CN215720367U - Elastic clutch protection mechanism of transmission pair - Google Patents

Abstract

The utility model relates to the technical field of mechanical clutch structures, in particular to an elastic clutch protection mechanism of a transmission pair, which comprises a motor, a transmission shaft, an output end gear, a clutch plate and a fixing structure, wherein the transmission shaft is in transmission connection with the motor; the output end gear is in clearance fit with the transmission shaft, and a plurality of grooves are formed in the end face of the output end gear; the clutch plate is elastic and comprises a base plate and a plurality of elastic arms arranged at intervals along the circumferential direction of the base plate, each elastic arm is provided with a bulge, and the clutch plate is in transmission connection with the transmission shaft; the fixing structure is used for enabling the end face of the substrate to be mutually abutted to the end face of the output end gear, and enabling the protrusion to be detachably connected with the groove.

Description

Elastic clutch protection mechanism of transmission pair

Technical Field

The utility model relates to the technical field of mechanical clutch structures, in particular to an elastic clutch protection mechanism of a transmission pair.

Background

In the prior art, the reduction mechanism is generally divided into two types: one is that the worm gear and worm are self-locking, can prevent the worm gear from transmitting to the worm in the opposite direction effectively, but does not allow to rotate the output gear by hand, if rotate the output gear by force the gear and worm is apt to destroy; the second is that the worm gear and the worm are not self-locking, which can allow the output gear to be manually rotated, but the requirement on the internal gear and the worm is higher, and if the output gear is tightly held or overloaded in normal operation, the internal gear and the worm are easily worn or damaged.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the technical problems to be solved by the utility model are as follows: the elastic clutch protection mechanism of the transmission pair can protect the internal gear worm from being damaged difficultly.

In order to solve the technical problems, the utility model adopts the technical scheme that: the elastic clutch protection mechanism of the transmission pair comprises a motor, a transmission shaft, an output end gear, a clutch plate and a fixed structure;

the transmission shaft is in transmission connection with the motor, the output end gear and the clutch plate are both arranged in the axial direction of the transmission shaft, and the fixing structure is fixed at the tail end of the transmission shaft;

the output end gear is in clearance fit with the transmission shaft, and a plurality of grooves are formed in the end face of the output end gear;

the clutch plate is elastic and comprises a base plate and a plurality of elastic arms arranged at intervals along the circumferential direction of the base plate, each elastic arm is provided with a bulge, and the clutch plate is in transmission connection with the transmission shaft;

the fixing structure is used for enabling the end face of the substrate to be mutually abutted to the end face of the output end gear, and enabling the protrusion to be detachably connected with the groove.

The transmission mechanism comprises a worm, a bevel gear and a transmission structure, wherein the worm and the bevel gear are self-locked with each other, and the transmission structure is in transmission connection with the bevel gear and the transmission shaft respectively.

Wherein a guide surface is arranged on the surface of the protrusion.

Wherein, the fixed knot constructs for machine tooth screw.

The motor is characterized by further comprising a gear set, wherein the gear set comprises an input end and an output end, the input end is in transmission connection with the motor, and the output end is in transmission connection with the transmission shaft.

The utility model has the beneficial effects that: the tail end of the transmission shaft is provided with a fixing structure, so that the end surface of the clutch plate is mutually attached to the end surface of the output end gear through the fixing structure, the bulge is kept in a state of being inserted into the groove, and the transmission between the transmission rod and the output end gear is realized through the matching of the bulge and the groove; the elastic arm connected with the bulge is elastic, so that when the output end gear is in a holding state, the elastic arm deforms to enable the bulge to be separated from the groove temporarily until the bulge enters the next groove, damage to a transmission structure between the transmission shaft and the motor due to the fact that the output end gear is in the holding state is avoided, and the service life of the elastic clutch protection mechanism of the transmission pair is prolonged; when the output end gear rotates reversely, the worm and the helical gear are self-locked to be separated from each other through the convex groove, so that damage to a transmission structure due to reverse rotation of the output end gear is avoided.

Drawings

FIG. 1 is a schematic structural diagram of an elastic clutch protection mechanism of a transmission pair according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a transmission structure according to an embodiment of the present invention;

FIG. 3 is a schematic view of the output gear according to the present invention;

fig. 4 is a schematic structural view of a clutch plate in the embodiment of the present invention.

Description of reference numerals: 1. a motor; 2. a drive shaft; 3. a fixed structure; 4. an output end gear; 41. a groove; 5. a clutch plate; 51. a substrate; 52. a resilient arm; 53. a protrusion; 6. a worm; 7. a helical gear; 8. a gear set.

Detailed Description

In order to explain technical contents, achieved objects, and effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.

Referring to fig. 1 to 4, the present invention relates to a transmission pair elastic clutch protection mechanism, which includes a motor 1, a transmission shaft 2, anoutput end gear 4, aclutch plate 5 and afixing structure 3; the transmission shaft 2 is in transmission connection with the motor 1, theoutput end gear 4 and theclutch plate 5 are both arranged in the axial direction of the transmission shaft 2, and thefixed structure 3 is fixed at the tail end of the transmission shaft 2; theoutput end gear 4 is in clearance fit with the transmission shaft 2, and a plurality ofgrooves 4 are formed in the end face of theoutput end gear 4; theclutch plate 5 is elastic, theclutch plate 5 comprises abase plate 51 and a plurality ofelastic arms 52 arranged at intervals along the circumferential direction of thebase plate 51, eachelastic arm 52 is provided with abulge 53, and theclutch plate 5 is in transmission connection with the transmission shaft 2; thefixing structure 3 is used for abutting the end face of thesubstrate 51 and the end face of theoutput end gear 4 against each other, and enabling theprotrusion 53 and thegroove 4 to be detachably connected.

Specifically, the transmission process of the utility model is as follows: the motor 1 is in transmission connection with the transmission shaft 2 to drive the transmission shaft 2 to rotate, and the transmission shaft 2 is in transmission connection with theclutch plate 5, and the transmission shaft 2 is in clearance fit with theoutput end gear 4, namely, the transmission shaft 2 is mutually matched with thegroove 4 of theoutput end gear 4 through thebulge 53 in theclutch plate 5 to realize the transmission connection of the transmission shaft 2 and theoutput end gear 4.

Theclutch plate 5 is elastic, that is, in one embodiment, theoutput end gear 4 is held tightly, at this time, theelastic arm 52 on theclutch plate 5 deforms due to the relative rotation between theclutch plate 5 and theoutput end gear 4, and the transmission connection between theoutput end gear 4 and theclutch plate 5 is released in a manner that theprotrusion 53 is separated from thegroove 4, so that in this condition, the motor 1 can be protected from being damaged.

It should be noted that theprotrusion 53 is detachably connected to thegroove 4, that is, theprotrusion 53 is connected to thegroove 4 to realize the transmission connection between theclutch plate 5 and theoutput end gear 4, and theprotrusion 53 is separated from thegroove 4 to realize the transmission disconnection between theclutch plate 5 and theoutput end gear 4, and theclutch plate 5 continues to rotate relative to theoutput end gear 4, so that theprotrusion 53 is connected to thegroove 4 again to realize the reconnection between theclutch plate 5 and theoutput end gear 4.

Preferably, an accommodating groove for accommodating theclutch plate 5 is arranged on the end face of theoutput end gear 4, so that the transmission shaft 2, theclutch plate 5 and theoutput end gear 4 are coaxially arranged.

From the above description, the beneficial effects of the present invention are: the tail end of the transmission shaft 2 is provided with afixing structure 3, so that the end surface of theclutch plate 5 is attached to the end surface of theoutput end gear 4 through thefixing structure 3, thebulge 53 is kept in a state of being inserted into thegroove 4, and the transmission between the transmission rod and theoutput end gear 4 is realized through the matching of thebulge 53 and thegroove 4; and because theelastic arm 52 connected with theprotrusion 53 is elastic, when theoutput end gear 4 is in a clasping state, theelastic arm 52 deforms to enable theprotrusion 53 to be separated from thegroove 4 for a short time until theprotrusion 53 enters thenext groove 4, so that damage to a transmission structure between the transmission shaft 2 and the motor 1 caused by the clasping state of theoutput end gear 4 is avoided, and the service life of the elastic clutch protection mechanism of the transmission pair is prolonged.

Further, the worm and the bevel gear are self-locked with each other, and the transmission structure is in transmission connection with the bevel gear and the transmission shaft respectively.

Referring to fig. 2, in one embodiment, the elastic clutch protection mechanism of the transmission pair further comprises a worm 6 and a bevel gear 7 which can be self-locked, and a transmission structure, specifically, the worm 6 is in transmission connection with the motor 1, the bevel gear 7 is meshed with the worm 6 and has self-locking property, and the transmission structure is arranged between the bevel gear 7 and the transmission shaft 2 so as to enable the bevel gear 7 and the transmission shaft 2 to be in transmission connection. When theoutput end gear 4 rotates reversely, the worm 6 and the helical gear 7 are self-locked, so that theprotrusion 53 on theclutch plate 5 is separated from thegroove 4 on the helical gear 7 temporarily, and the transmission structure is prevented from being damaged due to the reverse rotation of theoutput end gear 4.

Further, a guide surface is provided on the surface of theprojection 53.

As can be seen from the above description, the surface of theprotrusion 53 has a guiding surface, and preferably, theprotrusion 53 is a frustum so as to avoid theprotrusion 53 from being stuck in thegroove 4 to cause theclutch plate 5 to lose the clutch effect by the circumferential surface of the frustum being a slope.

Further, thefixing structure 3 is a machine thread screw.

As can be seen from the above description, thefixing structure 3 is configured as a machine tooth screw so as to mount theclutch plate 5 and theoutput gear 4 on the transmission shaft 2 during the production process, and also so as to change the pre-compression force of the machine tooth screw on theclutch plate 5 by changing the screwing-in distance of the machine tooth screw according to actual requirements.

Further, still include gear train 8, gear train 8 includes input and output, the input with motor 1 transmission is connected, the output with transmission shaft 2 transmission is connected.

In one embodiment, the transmission structure is a gear set 8, so as to respectively transmit and connect the motor 1 and theoutput gear 4 through the gear set 8, thereby realizing the transmission connection between the motor 1 and theoutput gear 4, and the gear set 8 can be set to adjust the rotation speed of theoutput gear 4 according to actual requirements.

It should be noted that, in this context, the "self-locking" is mainly achieved by designing the deployment rotation angle of the worm 6 to be smaller than the friction angle of the helical gear 7 in contact with the worm 6.

Example one

Referring to fig. 1 to 4, the transmission pair elastic clutch protection mechanism comprises a transmission pair elastic clutch protection mechanism, which comprises a motor 1, a transmission shaft 2, anoutput end gear 4, aclutch plate 5, afixing structure 3, a worm 6, a gear set 8 and a helical gear 7; the transmission shaft 2 is in transmission connection with the motor 1, theoutput end gear 4 and theclutch plate 5 are both arranged in the axial direction of the transmission shaft 2, and thefixed structure 3 is fixed at the tail end of the transmission shaft 2; theoutput end gear 4 is in clearance fit with the transmission shaft 2, threegrooves 4 are formed in the end face of theoutput end gear 4, and the threegrooves 4 are arranged at equal intervals along the circumferential direction of the end face of theoutput end gear 4; theclutch plate 5 is elastic, theclutch plate 5 comprises abase plate 51 and threeelastic arms 52 arranged at intervals along the circumferential direction of thebase plate 51, eachelastic arm 52 is provided with aprotrusion 53, theclutch plate 5 is in transmission connection with the transmission shaft 2, the position and the shape of eachprotrusion 53 correspond to thegroove 4, the motor 1 is in transmission connection with the worm 6, the worm 6 is meshed with the helical gear 7 and has self-locking performance, and the gear set 8 is arranged between the helical gear 7 and the transmission shaft 2 to realize the transmission connection of the helical gear 7 and the transmission shaft 2;

thefixing structure 3 is used for enabling the end face of thesubstrate 51 and the end face of theoutput end gear 4 to be mutually abutted, and enabling theprotrusion 53 and thegroove 4 to be detachably connected;

a guide surface is arranged on the surface of thebulge 53, and thebulge 53 is a frustum;

thefixing structure 3 is a machine tooth screw.

In summary, the utility model provides an elastic clutch protection mechanism for a transmission pair, wherein afixing structure 3 is arranged at the tail end of a transmission shaft 2, so that the end surface of aclutch plate 5 and the end surface of anoutput end gear 4 are attached to each other through thefixing structure 3, and aprotrusion 53 is kept in a state of being inserted into agroove 4, so that the transmission between a transmission rod and theoutput end gear 4 is realized through the matching of theprotrusion 53 and thegroove 4; theelastic arm 52 connected with thebulge 53 is elastic, so that when theoutput end gear 4 is in a holding state, theelastic arm 52 deforms to enable thebulge 53 to be separated from thegroove 4 for a short time until thebulge 53 enters thenext groove 4, damage to a transmission structure between the transmission shaft 2 and the motor 1 due to the fact that theoutput end gear 4 is in the holding state is avoided, and the service life of the elastic clutch protection mechanism of the transmission pair is prolonged; and when theoutput end gear 4 rotates reversely, the worm 6 and the helical gear 7 are self-locked so as to be separated from thegroove 4 on the helical gear 7 temporarily through thebulge 53 on theclutch plate 5, so that the transmission structure is prevented from being damaged due to the reverse rotation of theoutput end gear 4.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to the related technical fields, are included in the scope of the present invention.

Claims (5)

1. The elastic clutch protection mechanism of the transmission pair is characterized by comprising a motor, a transmission shaft, an output end gear, a clutch plate and a fixing structure;

the transmission shaft is in transmission connection with the motor, the output end gear and the clutch plate are both arranged in the axial direction of the transmission shaft, and the fixing structure is fixed at the tail end of the transmission shaft;

the output end gear is in clearance fit with the transmission shaft, and a plurality of grooves are formed in the end face of the output end gear;

the clutch plate is elastic and comprises a base plate and a plurality of elastic arms arranged at intervals along the circumferential direction of the base plate, each elastic arm is provided with a bulge, and the clutch plate is in transmission connection with the transmission shaft;

the fixing structure is used for enabling the end face of the substrate to be mutually abutted to the end face of the output end gear, and enabling the protrusion to be detachably connected with the groove.

2. The elastic clutch protection mechanism of the transmission pair as claimed in claim 1, further comprising a worm and a helical gear which are self-locked with each other, and a transmission structure, wherein the transmission structure is in transmission connection with the helical gear and the transmission shaft respectively.

3. The elastic clutch protection mechanism of the transmission pair as claimed in claim 1, wherein a guide surface is arranged on the surface of the projection.

4. The elastic clutch protection mechanism of the transmission pair as claimed in claim 1, wherein the fixing structure is a machine screw.

5. The elastic clutch protection mechanism of the transmission pair as claimed in claim 1, further comprising a gear set, wherein the gear set comprises an input end and an output end, the input end is in transmission connection with the motor, and the output end is in transmission connection with the transmission shaft.

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