CN216200230U - Novel stepless speed change device - Google Patents

Abstract

The utility model provides a novel stepless speed change device, includes all along input shaft and the output shaft that left right direction set up, the input shaft is located the output shaft right side, and input shaft left side and right side are provided with left automatic pressurization mechanism and right automatic pressurization mechanism respectively, and left automatic pressurization mechanism and right automatic pressurization mechanism are preceding at the input shaft, the rear side transmission respectively is equipped with a gyro wheel position output mechanism that radially slides, and two gyro wheel position output mechanism's that radially slides power take off end and output shaft transmission are connected. The first locking nut and the second locking nut respectively limit the first pressurizing disc and the third pressurizing disc, positive pressure between the friction disc and the roller is sealed on the input shaft, and bearings at two ends of the input shaft do not bear the positive pressure, so that the stepless speed change device is suitable for high-speed rotation; the reversing mechanism enables the first friction disc and the second friction disc to rotate in opposite directions, so that the two friction discs can drive the roller at the same time, and the roller transmission mechanism is large in transmission torque, high in transmission efficiency and good in speed change performance.

Description

Novel stepless speed change device

Technical Field

The utility model belongs to the technical field of mechanical variable transmission, and particularly relates to a novel stepless speed change device.

Background

The existing stepless speed changing box (stepless speed changing box) uses two driving wheels with changeable diameters, and the middle sleeve is sleeved with a driving belt for driving. The stepless speed change principle is that two ends of a transmission belt are wound on a conical belt wheel, and the outer diameter of the belt wheel is steplessly changed according to the oil pressure. There are also continuously variable transmissions in which two variable-diameter drive wheels are changed to two non-concentric friction discs. When the two speed changing devices work, the driving wheel and the friction disc are both fixed on the box body of the speed changing box, and the box body of the speed changing box is stressed greatly.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the utility model provides the novel stepless speed change device which is compact in structure, high in transmission efficiency and free of stress on a gearbox body during working.

In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides a novel stepless speed change device, includes all along input shaft and the output shaft that left right direction set up, the input shaft is located the output shaft right side, and input shaft left side and right side are provided with left automatic pressurization mechanism and right automatic pressurization mechanism respectively, and left automatic pressurization mechanism and right automatic pressurization mechanism are preceding at the input shaft, the rear side transmission respectively is equipped with a gyro wheel position output mechanism that radially slides, and two gyro wheel position output mechanism's that radially slides power take off end and output shaft transmission are connected.

Left side automatic pressurization mechanism includes from the right side to the left side in proper order coaxial line install the first lock nut on the input shaft, first pressure dish, first rolling torque transmitter, the second pressure dish, thrust ball keeps ware and first friction disc, circle and input shaft excircle splined connection in the first pressure dish, first lock nut and input shaft excircle threaded connection, first lock nut left side and first pressure dish right side fastening crimping, first friction disc left surface is the friction surface, second pressure dish left surface and first friction disc right surface all be equipped with thrust ball crimping and the rolling complex ring channel in the thrust ball keeps ware, thrust ball keeps ware outside and speed change gear's casing fixed connection, first pressure dish left surface is through first rolling torque transmitter and second pressure dish right surface transmission crimping.

First roll moment of torsion transmitter includes that the coaxial line installs the first ball on the input shaft and keeps the ware, first ball keeps the ware to be equipped with the first ball of a plurality of along the circumferencial direction, the first right V type groove of a plurality of has been seted up to first pressurization dish left surface, all first right V type grooves are arranged along input shaft central line circumference array, the radial direction of input shaft is followed to the central line in first right V type groove, the first left V type groove that equals and the one-to-one with first right V type groove quantity is seted up to the second pressurization dish right surface, first ball sets up inside the rhombus space that first right V type groove and first left V type groove formed.

The right automatic pressurizing mechanism comprises a second locking nut, a third pressurizing disc, a second rolling torque transmitter and a second friction disc, wherein the second locking nut is coaxially mounted on the input shaft from left to right in sequence, the inner circle of the third pressurizing disc is in splined connection with the outer circle of the input shaft, the second locking nut is in threaded connection with the outer circle of the input shaft, the right side of the second locking nut is in fastening and crimping with the left side of the third pressurizing disc, the right side of the third pressurizing disc is in transmission and crimping with the left side of the second friction disc through the second rolling torque transmitter, and the right side of the second friction disc is a friction surface.

The second rolling torque transmitter comprises a second ball retainer coaxially mounted on the input shaft, a plurality of second balls are arranged on the second ball retainer along the circumferential direction, a plurality of second left V-shaped grooves are formed in the right side surface of the third pressurizing disc, all the second left V-shaped grooves are arranged along the circumferential array of the center line of the input shaft, the center line of each second left V-shaped groove is arranged along the radial direction of the input shaft, second right V-shaped grooves which are equal in number and correspond to the second left V-shaped grooves one to one are formed in the left side surface of the second friction disc, and the second balls are arranged inside rhombic spaces formed by the second left V-shaped grooves and the second right V-shaped grooves.

The two roller position radial sliding output mechanisms are identical in structure and are symmetrically arranged about the central line of the input shaft, each roller position radial sliding output mechanism comprises a central spline shaft perpendicular to the input shaft, rollers and a first bevel gear are coaxially mounted on the central spline shafts, the rollers are connected to the central spline shafts in a sliding mode, and the left side and the right side of each roller are respectively in rolling pressure connection with the right side face of the second friction disc and the left side face of the first friction disc; and a second bevel gear is installed on the output shaft, and the first bevel gears of the two roller position radial sliding output mechanisms are simultaneously meshed with the second bevel gear.

The left side and the right side of the first ball retainer are respectively provided with a first disc spring, the first disc spring on the left side is in compression joint with the right side of the second pressurizing disc, and the first disc spring on the right side is in compression joint with the left side of the first pressurizing disc.

And the left side and the right side of the second ball retainer are both provided with second disc springs, the second disc spring on the left side is in compression joint with the right side of the third pressurizing disc, and the second disc spring on the right side is in compression joint with the left side of the second friction disc.

By adopting the technical scheme, all the parts are arranged in the box body of the gearbox, and the right end of the input shaft and the left end of the output shaft respectively extend out of the left side and the right side of the box body. The first locking nut is used for positioning and locking the first pressurizing plate, the second locking nut is used for positioning and locking the third pressurizing plate, the two rollers are respectively in rotating fit with the first friction disc and the second friction disc, namely the first friction disc and the second friction disc lock the friction force of the two rollers to the axial direction of the input shaft, and the box body of the gearbox is not stressed any more, so that the structure is compact, the speed change performance is better, and the transmission efficiency is higher. The thrust ball retainer is fixed with the shell of the speed changing device, and the thrust ball retainer is used for retaining the position of the thrust ball, so that the second pressurizing disc, the thrust ball retainer and the first friction disc form a set of reversing mechanism, the rotation directions of the first friction disc and the second friction disc are opposite, the two friction discs can simultaneously drive two rollers, and the speed changing device is large in transmission torque, high in transmission efficiency and good in speed changing performance.

The first disc spring and the second disc spring both play a role in ensuring that the left side and the right side of the two idler wheels always keep the pressure of the second friction disc and the first friction disc, and ensuring the reliability of friction transmission.

The stepless speed regulation principle of the utility model is as follows: under the condition that the rotating speed of the input shaft is constant, linear speeds of friction surfaces of the first friction disk and the second friction disk at each point in the radial direction are different, and the purpose of changing the rotating speed is achieved by changing the contact positions of the roller and the friction surfaces of the friction disks. Two symmetrically arranged rollers symmetrically and synchronously slide along the central spline shaft, so that the position of a contact point on the friction surface of the roller and the friction disc can be changed, and stepless speed change is realized. The sliding driving mechanism of the roller along the central spline shaft is the prior conventional technology, and the specific construction is not described again.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

fig. 2 is a structural view of an embodiment of the present invention.

Detailed Description

As shown in fig. 1 and 2, the novel stepless speed change device comprises aninput shaft 1 and anoutput shaft 2 which are arranged along the left-right direction, theinput shaft 1 is positioned on the right side of theoutput shaft 2, the left side and the right side of theinput shaft 1 are respectively provided with a left automatic pressurizing mechanism and a right automatic pressurizing mechanism, a roller position radial sliding output mechanism is respectively arranged between the left automatic pressurizing mechanism and the right automatic pressurizing mechanism in a transmission manner at the front side and the rear side of theinput shaft 1, and the power output ends of the two roller position radial sliding output mechanisms are in transmission connection with theoutput shaft 2.

The left automatic pressurizing mechanism comprises afirst lock nut 3, a firstpressurizing plate 4, a first rolling torque transmitter, a secondpressurizing plate 22, athrust ball retainer 25 and afirst friction disc 6 which are coaxially arranged on theinput shaft 1 from right to left in sequence, circle and 1 excircle splined connection of input shaft in thefirst pressure disk 4,first lock nut 3 and 1 excircle threaded connection of input shaft, 3 left sides of first lock nut and the 4 right sides fastening crimping of first pressure disk, 6 left surfaces of first friction disk are the friction surface, 22 left surfaces of second pressure disk and 6 right surfaces of first friction disk all be equipped with thrust ball hold 5 crimping and the roll complex ring channel of thrust ball in theware 25, thrust ball holds 25 outsides and speed change gear's casing 26 fixed connection, the left surfaces offirst pressure disk 4 is through first rolling torque transmitter and the 22 right sides transmission crimping of second pressure disk.

First rolling moment of torsion transmitter includes that the coaxial line is installed on the input shaft first ball and keepsware 7, first ball keepsware 7 to be equipped with thefirst ball 8 of a plurality of along the circumferencial direction, the firstright V type 18 of a plurality of has been seted up tofirst pressurization dish 4 left surface, all firstright V type 18 are arranged along 1 central line circumference array of input shaft, the radial direction ofinput shaft 1 is followed to the central line in firstright V type 18, the firstleft V type 19 that equals and the one-to-one with firstright V type 18 quantity is seted up tosecond pressurization dish 22 right flank,first ball 8 sets up inside the rhombus space that firstright V type 18 and firstleft V type 19 formed.

Automatic pressurization mechanism on right side includes from left to right coaxial line in proper order and installssecond lock nut 9 oninput shaft 1,third pressure disk 10, second rolling torque transmitter andsecond friction disk 11, circle and 1 excircle splined connection of input shaft in thethird pressure disk 10,second lock nut 9 and 1 excircle threaded connection of input shaft, 9 right sides of second lock nut andthird pressure disk 10 left sides fastening crimping,third pressure disk 10 right flank passes through second rolling torque transmitter and 11 left surfaces transmission crimping of second friction disk, 11 right flank of second friction disk is the friction surface.

The second rolling torque transmitter includes that the coaxial line installs the second ball on the input shaft and keeps 12, second ball keeps 12 to be equipped with a plurality ofsecond ball 13 along the circumferencial direction, a plurality of second leftV type groove 20 has been seted up tothird pressurization dish 10 right side, all second leftV type grooves 20 are arranged along 1 central line circumference array of input shaft, the radial direction ofinput shaft 1 is followed to the central line in second leftV type groove 20, second rightV type groove 21 that equals and the one-to-one with second leftV type groove 20 quantity is seted up tosecond friction disk 11 left side,second ball 13 sets up inside the rhombus space that second leftV type groove 20 and second rightV type groove 21 formed.

The two roller position radial sliding output mechanisms are identical in structure and are symmetrically arranged about the center line of theinput shaft 1, each roller position radial sliding output mechanism comprises acentral spline shaft 14 perpendicular to theinput shaft 1, aroller 15 and afirst bevel gear 16 are coaxially mounted on thecentral spline shaft 14, theroller 15 is connected onto thecentral spline shaft 14 in a sliding mode, and the left side and the right side of theroller 15 are respectively in rolling pressure connection with the right side face of thesecond friction disc 11 and the left side face of thefirst friction disc 6; theoutput shaft 2 is provided with asecond bevel gear 17, and thefirst bevel gear 16 of the two roller position radial slip output mechanism is simultaneously meshed with thesecond bevel gear 17.

Thefirst disc spring 23 is arranged on each of the left side and the right side of thefirst ball retainer 7, thefirst disc spring 23 on the left side is in compression joint with the right side surface of the secondpressurizing plate 22, and thefirst disc spring 23 on the right side is in compression joint with the left side surface of the firstpressurizing plate 4.

Thesecond disc springs 24 are arranged on the left side and the right side of thesecond ball retainer 12, the leftsecond disc spring 24 is in pressure connection with the right side face of thethird pressure plate 10, and the rightsecond disc spring 24 is in pressure connection with the left side face of thesecond friction disc 11.

Thefirst disc spring 23 and thesecond disc spring 24 both ensure that the pressure of thesecond friction disc 11 and thefirst friction disc 6 is always kept on the left and right sides of the tworollers 15, and ensure the reliability of friction transmission.

The specific working process of the utility model is as follows: the power is transmitted from theinput shaft 1 to theoutput shaft 2, theinput shaft 1 rotates to drive the firstpressurizing plate 4 and the thirdpressurizing plate 10 to rotate, the right side of the thirdpressurizing plate 10 drives thesecond friction disc 11 to rotate through a plurality ofsecond balls 13, and thesecond ball retainer 12 limits that thesecond balls 13 can only rotate and cannot move along the radial direction; meanwhile, the left side surface of thefirst pressure plate 4 drives thesecond pressure plate 22 to rotate through the plurality offirst balls 8, thethrust ball retainer 25 is fixed with the shell 26 of the speed changing device, so that steel balls of thethrust balls 5 cannot rotate along an annular groove on the right side surface of thefirst friction plate 6, the transmission structure enables thesecond pressure plate 22, thethrust balls 5, thethrust ball retainer 25 and thefirst friction plate 6 to form a set of reverse mechanism, the rotation directions of thefirst friction plate 6 and thesecond friction plate 11 are opposite, thefirst friction plate 6 and thesecond friction plate 11 can drive the tworollers 15 to rotate simultaneously, therollers 15 drive thefirst bevel gears 16 to rotate through thecentral spline shaft 14, the twofirst bevel gears 16 simultaneously transmit motion to thesecond bevel gears 17, and thesecond bevel gears 17 drive theoutput shaft 2 to output power. During operation, the contact point positions of the tworollers 15 with thefirst friction disc 6 and thesecond friction disc 11 in the radial direction are synchronously changed, so that stepless speed change operation is realized.

The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the utility model as defined by the appended claims. The directions of "front, back, left, right, up, down" and the like are also only used to facilitate the understanding of the technical solutions by those skilled in the art, and do not limit the protection scope of the present invention.

Claims (8)

1. The utility model provides a novel infinitely variable device, includes input shaft and the output shaft that all sets up along left right direction, and the input shaft is located the output shaft right side, its characterized in that: the left side and the right side of the input shaft are respectively provided with a left automatic pressurizing mechanism and a right automatic pressurizing mechanism, a roller position radial sliding output mechanism is respectively arranged between the left automatic pressurizing mechanism and the right automatic pressurizing mechanism in a transmission way at the front side and the rear side of the input shaft, and the power output ends of the two roller position radial sliding output mechanisms are in transmission connection with an output shaft.

2. A novel continuously variable transmission as claimed in claim 1, wherein: left side automatic pressurization mechanism includes from the right side to the left side in proper order coaxial line install the first lock nut on the input shaft, first pressure dish, first rolling torque transmitter, the second pressure dish, thrust ball keeps ware and first friction disc, circle and input shaft excircle splined connection in the first pressure dish, first lock nut and input shaft excircle threaded connection, first lock nut left side and first pressure dish right side fastening crimping, first friction disc left surface is the friction surface, second pressure dish left surface and first friction disc right surface all be equipped with thrust ball crimping and the rolling complex ring channel in the thrust ball keeps ware, thrust ball keeps ware outside and speed change gear's casing fixed connection, first pressure dish left surface is through first rolling torque transmitter and second pressure dish right surface transmission crimping.

3. A novel continuously variable transmission as claimed in claim 2, wherein: first roll moment of torsion transmitter includes that the coaxial line installs the first ball on the input shaft and keeps the ware, first ball keeps the ware to be equipped with the first ball of a plurality of along the circumferencial direction, the first right V type groove of a plurality of has been seted up to first pressurization dish left surface, all first right V type grooves are arranged along input shaft central line circumference array, the radial direction of input shaft is followed to the central line in first right V type groove, the first left V type groove that equals and the one-to-one with first right V type groove quantity is seted up to the second pressurization dish right surface, first ball sets up inside the rhombus space that first right V type groove and first left V type groove formed.

4. A novel continuously variable transmission as claimed in claim 2, wherein: the right automatic pressurizing mechanism comprises a second locking nut, a third pressurizing disc, a second rolling torque transmitter and a second friction disc, wherein the second locking nut is coaxially mounted on the input shaft from left to right in sequence, the inner circle of the third pressurizing disc is in splined connection with the outer circle of the input shaft, the second locking nut is in threaded connection with the outer circle of the input shaft, the right side of the second locking nut is in fastening and crimping with the left side of the third pressurizing disc, the right side of the third pressurizing disc is in transmission and crimping with the left side of the second friction disc through the second rolling torque transmitter, and the right side of the second friction disc is a friction surface.

5. The novel continuously variable transmission device according to claim 4, characterized in that: the second rolling torque transmitter comprises a second ball retainer coaxially mounted on the input shaft, a plurality of second balls are arranged on the second ball retainer along the circumferential direction, a plurality of second left V-shaped grooves are formed in the right side surface of the third pressurizing disc, all the second left V-shaped grooves are arranged along the circumferential array of the center line of the input shaft, the center line of each second left V-shaped groove is arranged along the radial direction of the input shaft, second right V-shaped grooves which are equal in number and correspond to the second left V-shaped grooves one to one are formed in the left side surface of the second friction disc, and the second balls are arranged inside rhombic spaces formed by the second left V-shaped grooves and the second right V-shaped grooves.

6. The novel continuously variable transmission device according to claim 4, characterized in that: the two roller position radial sliding output mechanisms are identical in structure and are symmetrically arranged about the central line of the input shaft, each roller position radial sliding output mechanism comprises a central spline shaft perpendicular to the input shaft, rollers and a first bevel gear are coaxially mounted on the central spline shafts, the rollers are connected onto the central spline shafts in a sliding mode, and the left side and the right side of each sliding roller are respectively in rolling pressure connection with the right side face of the second friction disc and the left side face of the first friction disc; and a second bevel gear is installed on the output shaft, and the first bevel gears of the two roller position radial sliding output mechanisms are simultaneously meshed with the second bevel gear.

7. A novel continuously variable transmission as claimed in claim 5, wherein: the left side and the right side of the first ball retainer are respectively provided with a first disc spring, the first disc spring on the left side is in compression joint with the right side of the second pressurizing disc, and the first disc spring on the right side is in compression joint with the left side of the first pressurizing disc.

8. A novel continuously variable transmission as claimed in claim 5, wherein: and the left side and the right side of the second ball retainer are both provided with second disc springs, the second disc spring on the left side is in compression joint with the right side of the third pressurizing disc, and the second disc spring on the right side is in compression joint with the left side of the second friction disc.

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