Background technology
Bench vice is used to the universal fixturing of holding workpiece, is also one of instrument of tool and bench shop indispensability, and its effect is fixed workpiece to be processed, is convenient to further processing.Bench vice is fixing on the table by a base, and base connects rotatable caliper, caliper and jaw body form jaw, various workpiece can be clamped, jaw body can moving linearly under the drive of screw rod, can the size of adjusting jaw, plays clamping or loosens.
Under the prior art, in order to improve the strength of bench vice clamping, at bench vice screw rod tail through handle, the handle arm of force is large, thus more easily produces larger moment, thus can improve the strength of bench vice clamping; But adopt the mode of handle clamping to have unhandy feature, clamping speed is slow, have impact on the operating efficiency of bench vice.
Utility model content
Technical assignment of the present utility model is for above the deficiencies in the prior art, provides a kind of clamping fireballing bench vice.
The technical scheme in the invention for solving the technical problem is: the fireballing bench vice of a kind of clamping, and comprise bench vice main body, described bench vice main body comprises caliper, screw rod and jaw body, it is characterized in that: also comprise handwheel and speed change gear; Described speed change gear is positioned at the front end of jaw body, comprises power shaft, power transmission shaft, gear lever and gear, and described speed change gear shell is fixedly connected into jaw body and is integrated; Described power shaft mid portion is connected on speed change gear shell by bearing arrangement, and the front end of power shaft connects handwheel, and rear end connects a gear and No. two gears; Described screw front end connects No. three gears and No. four gears respectively, and four described gears are arranged by the order after forward direction successively according to the order of to No. four, and wherein No. two gears are identical with No. three gear set specifications; Described power transmission shaft two ends are connected on speed change gear shell by bearing arrangement, and wherein power transmission shaft two ends are matched in clearance with coordinating of bearing inner race; Described power transmission shaft pars intermedia connects No. five gears, No. six gears and No. seven gears respectively, five to No. seven described gears are according to order arrangement from front to back, spacing wherein between No. five gears and No. six gears equals the spacing between a gear and No. three gears, spacing between No. six gears and No. seven gears equals the spacing between No. two gears and No. four gears, the radius of No. five gears is less than the radius of a gear, the radius of No. six gears is greater than the radius of No. two gears and No. three gears, and the radius of No. seven gears is less than the radius of No. four gears; Described gear lever is for falling Y-shaped structure, and its bipod lower end is tubular structure, is nested on power transmission shaft, the both sides of No. six gears; Housing outer end is stretched out through the opening at speed change gear case body top in gear lever upper end.
No. two above-mentioned gears and power shaft are integral type structure, and No. three described gears and screw rod are integral type structure.
Compared with prior art, the utility model has following outstanding beneficial effect:
1, accelerate clamping hourly velocity fast, improve clamping efficiency;
2, slow down when clamping and can improve active force, can clamp with less active force.
Detailed description of the invention
Below in conjunction with specification drawings and specific embodiments, the utility model is further illustrated.
As shown in Figure 1, 2, the utility model comprises bench vice main body, handwheel 1 and speed change gear.Described bench vice main body is prior art, comprises caliper 14, screw rod 7 and jaw body 13.Be front for ease of the direction described corresponding to setting jaw body 13, after the direction corresponding to caliper 14 is.Described jaw body 13 and caliper 14 are slidably connected, described screw rod 7 one end is through jaw body 13 rear through hole, be rotationally connected with jaw body 13, but the two can not move axially, described screw rod 7 other end is through the nut in caliper 14, by bolt and nut mating reaction, screw rod 7 rotates can be with movable clamp port body 13 to move axially relative to caliper 14, plays clamping or loosens.
Described speed change gear is positioned at the front end of jaw body, comprises the power shaft 2, power transmission shaft 8, gear lever 11 and the gear that comprise in the enclosure.Described speed change gear shell and jaw body 13 are fixedly connected into and are integrated, and described power shaft 2 mid portion is connected on speed change gear shell by bearing arrangement, and the front end of power shaft 2 connects handwheel 1, and rear end connects a gear 3 and No. two gears 4; Described screw rod 7 front end connects No. three gears 5 and No. four gears 6 respectively, and four described gears are arranged by the order after forward direction successively according to the order of to No. four, and wherein No. two gears 4 are identical with No. three gear 5 specifications.Described power transmission shaft 8 two ends are connected on speed change gear shell by bearing arrangement, and wherein power transmission shaft 8 two ends are matched in clearance with coordinating of bearing inner race.Described power transmission shaft 8 pars intermedia connects No. five gears 9 respectively, No. six gears 10 and No. seven gears 12, five to No. seven described gears are according to order arrangement from front to back, spacing wherein between No. five gears 9 and No. six gears 10 equals the spacing between a gear 3 and No. three gears 5, spacing between No. six gears 10 and No. seven gears 12 equals the spacing between No. two gears 4 and No. four gears 6, the radius of No. five gears 9 is less than the radius of a gear 3, the radius of No. six gears 10 is greater than the radius of No. two gears 4 and No. three gears 5, the radius of No. seven gears 12 is less than the radius of No. four gears 6.
Described gear lever 11 is for falling Y-shaped structure, and its bipod lower end is respectively the tubular structure with body of rod long axis normal, is nested on power transmission shaft 8, the both sides of No. six gears 10.Housing outer end is stretched out through the strip gab at speed change gear case body top in gear lever 11 upper end, and the centre-to-centre spacing that the length of described strip gab fore-and-aft direction equals No. two gears 4 and No. three gears 5 adds gear lever 11 top thickness along the longitudinal direction.
Operating process is as follows: at the initial period of holding workpiece, gear lever 11 is placed in rear end, as shown in Figure 1, a gear 3 is meshed with No. five gears 9, No. three gears 5 are meshed with No. six gears 10, shake handwheel 1, power shaft 2 rotates, power transmission shaft 8 is driven to rotate by a gear 3 and No. five gears 9, power transmission shaft 8 drives screw rod 7 to rotate by No. six gears 10 and No. three gears 5, because gear 3 radius is greater than No. five gear 9 radiuses, so power transmission shaft 8 rotating speed is greater than power shaft 2 rotating speed, No. six gear 10 radiuses are greater than the radius of No. three gears 5, so the rotating speed of screw rod 7 is greater than the rotating speed of power transmission shaft 8, now speed change gear plays acceleration, clamping speed can be accelerated.Start after clamping puts in place work piece, now gear lever 11 is placed in front end, as shown in Figure 2, No. two gears 4 are meshed with No. six gears 10, No. seven gears 12 are meshed with No. four gears 6, because No. two gear 4 diameters are less than No. six gear 10 diameters, No. seven gear 12 diameters are less than No. four gear 6 diameters, so the rotating speed of power transmission shaft 8 is less than the rotating speed of power shaft 2, the rotating speed of screw rod 7 is less than the rotating speed of power transmission shaft 8, now speed change gear plays decelerating effect, can increase the moment of the rotation of screw rod 7 simultaneously, namely improves the strength of bench vice clamping.
In prioritization scheme, for improving structural strength, be convenient to assembling, described No. two gears 4 are integral type structure with power shaft 2, and described No. three gears 5 are integral type structure with screw rod 7.
It should be noted that; particular of the present utility model has been described in detail the utility model; for a person skilled in the art, the various apparent change carried out it when not deviating from spirit and scope of the present utility model is all within protection domain of the present utility model.