Bolt tightening equipment with adjustable distance between four shafts

Abstract

The utility model relates to a bolt tightening device with the distance between four shafts adjustable. The bolt tightening device comprises a machine frame, a first sliding base fixedly arranged on the machine frame, a second sliding base matched with the first sliding base and four bolt tightening shafts. The two first sliding seats are oppositely arranged in the left-right direction and can slide in the left-right direction relative to the rack. Every two of the four second sliding seats are matched into a group, and the four second sliding seats are correspondingly matched with the two first sliding seats respectively. The second sliding seat can slide in the front-back direction relative to the first sliding seat. The bolt tightening shafts are matched with the second sliding seats in a one-to-one correspondence mode and can move synchronously with the second sliding seats. And a main body of the bolt tightening shaft extends into the rack and is fixed. And shaft sleeves arranged on the bolt tightening shafts extend downwards to the outside relative to the rack. Linkage adjustment of the four tightening shafts can be achieved in the transverse direction and the longitudinal direction, so that the four tightening shafts can adapt to the tightening operation process of variable, complex and numerous bolts on an axle, the bolt tightening assembly efficiency can be improved, and the equipment purchase and maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bolt tightening, in particular to a bolt tightening device with adjustable four-axis spacing. Background Art

[0002] The tightening quality of the bolts on the front and rear axles of a car is related to the assembly performance of the entire vehicle and is a crucial factor affecting vehicle safety, driving stability and other indicators. Improving its assembly quality can play a certain role in improving the performance of the entire vehicle. Therefore, this field has long been continuously improving the axle bolt tightening device, and has fully transitioned from manual experience-based control of the tightening degree and consistency of the bolts to machine assembly tightening control.

[0003] Numerous bolts are installed in the axle area, and their spacing, both horizontally and vertically, is highly variable and complex. Current axle bolt tightening equipment often features fixed tightening axes or allows for adjustment of the spacing between the axes in only one direction. Consequently, the assembly shop must maintain multiple different bolt tightening equipment / tightening machines, which is time-consuming, labor-intensive, and wastes investment in equipment purchase and maintenance. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a four-axis adjustable bolt tightening device, which can simultaneously realize the linkage adjustment of the four tightening axes in the transverse and longitudinal directions, and can adapt to the changeable, complex and large number of bolt tightening operations on the axle, which helps to improve the efficiency of bolt tightening assembly and reduce equipment procurement and maintenance costs.

[0005] The technical solution adopted by the utility model to solve the technical problem is: a four-axis adjustable bolt tightening device, including a frame, a pair of first slides fixed on the frame, two pairs of second slides matching the first slides, and four bolt tightening shafts.

[0006] The two first slides are arranged opposite to each other and can slide relative to the frame along the left and right directions.

[0007] The four second slides form a group of two and are matched with the two first slides respectively. The two second slides in the same group are arranged front to back relative to each other and can slide relative to the first slides matched with them in the front to back direction.

[0008] The bolt tightening shafts are matched with the second slides in a one-to-one correspondence and are respectively fixedly connected to the corresponding second slides, so that they can move synchronously with the second slides relative to the first slide in the front-to-rear direction.

[0009] The main body of the bolt tightening shaft extends into the frame, and the shaft sleeves arranged at the lower end of the bolt tightening shaft extend downward relative to the frame and extend to the outside of the frame.

[0010] Optionally, a first drive assembly is fixedly mounted on the frame. The first drive assembly includes a motor, a belt drive mechanism, and a lead screw drive mechanism. The motor is matched with the input end of the belt drive mechanism, the output end of the belt drive mechanism is matched with the input end of the lead screw drive mechanism, and the two first slides are matched with the lead levers in the lead screw drive mechanism to form a lead screw slider drive mechanism, so that the first drive assembly can drive the two first slides to move synchronously in the left and right directions.

[0011] Optionally, a second drive assembly is fixedly provided on each of the two first slides.

[0012] The second drive assembly includes a motor, a belt drive mechanism and a screw drive mechanism, and the motor is matched with the input end of the belt drive mechanism, the output end of the belt drive mechanism is matched with the input end of the screw drive mechanism, and the two second slides in the same group are matched with the wire lever in the screw drive mechanism to form a screw slider drive mechanism, so as to achieve the purpose of the second drive assembly driving the two second slides to move synchronously in the left and right directions.

[0013] Optionally, a pair of linear rails extending in the front-to-back direction are fixed on each of the two first slides, and the paired linear rails are arranged alternately left and right; the two second slides arranged on each first slide are matched with the two linear rails, and the sleeve on the bolt tightening shaft corresponds to the lower side of the linear rail that is relatively on the inner side.

[0014] Optionally, the first slide is U-shaped, and the shaft sleeves of the two bolt tightening shafts arranged on the two paired second slides extend into the U-shaped openings of the first slide. The U-shaped openings on the two first slides are arranged opposite to each other.

[0015] When the paired second slides move relative to their matching first slides, the two bushings can move back and forth within the U-shaped opening. Therefore, the U-shaped openings on the first slides need to have an appropriate forward and backward extension. When the U-shaped openings on the two first slides approach each other, the four bushings on the two sets of second slides can also move closer together.

[0016] Optionally, the second slide is L-shaped, and the two end arms are matched with the track structure configured on the first slide. The corner of the second slide corresponds to the U-shaped opening on the first slide and is fixedly matched with the sleeve on the bolt tightening shaft.

[0017] The beneficial effect of the utility model is that the utility model can simultaneously realize the linkage adjustment of the four tightening shafts in the transverse direction and the longitudinal direction, so that it can more conveniently and flexibly adapt to the needs of the changeable, complex and large number of bolt tightening operations on the axle, help to improve the efficiency of bolt tightening assembly, and reduce equipment procurement and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0019] Figure 2 This is a schematic diagram of the main structure of the present utility model.

[0020] Figure 3 This is a schematic diagram of the bottom structure of the present invention.

[0021] In the figure: 10 frame; 20 first slide; 30 first drive assembly; 40 second slide; 50 second drive assembly; 60 bolt tightening shaft group one, 61 rear side bolt tightening shaft one, 611 shaft sleeve one, 62 front side bolt tightening shaft one, 621 shaft sleeve two; 70 bolt tightening shaft group two, 71 rear side bolt tightening shaft two, 711 shaft sleeve three, 72 front side bolt tightening shaft two, 721 shaft sleeve four. DETAILED DESCRIPTION

[0022] The structures, proportions, sizes, etc. illustrated in the drawings of the specification are only used to match the contents disclosed in the specification for the understanding and reading of those familiar with this technology. They are not used to limit the conditions for the implementation of the utility model and therefore have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed in the utility model without affecting the efficacy and purpose of the utility model. At the same time, terms such as "upper", "lower", "front", "back", and "middle" quoted in this specification are only for the convenience of description and are not used to limit the scope of the implementation of the utility model. Changes or adjustments in their relative relationships should also be considered as the scope of the implementation of the utility model without substantially changing the technical content.

[0023] like Figures 1 to 3The illustrated apparatus for tightening four bolts with adjustable spacing includes a frame 10, a pair of first slides 20 fixed to the frame 10, a first drive assembly 30 for driving the two first slides 20 to move synchronously, two pairs of second slides 40 matching the first slides 20, two second drive assemblies 50 for respectively driving the two groups of second slides 40 to move, and a first bolt tightening axis group 60 corresponding to one group of second slides 40 and a second bolt tightening axis group 70 corresponding to the other group of second slides 40. The first bolt tightening axis group 60 includes a first rear bolt tightening axis 61 with a first shaft sleeve 611 disposed thereon, and a first front bolt tightening axis 62 with a second shaft sleeve 621 disposed thereon. The second bolt tightening axis group 70 includes a second rear bolt tightening axis 71 with a third shaft sleeve 711 disposed thereon, and a second front bolt tightening axis 72 with a fourth shaft sleeve 721 disposed thereon.

[0024] The frame 10 is in the shape of a cube. The two first slides 20 are arranged opposite to each other in the left and right directions, and match the slide rail structure fixed on the lower end of the frame 10, so that the two first slides 20 can slide synchronously in the left and right directions relative to the frame 10. The four second slides 40 are grouped in pairs, respectively corresponding to the two first slides 20, and the two second slides 40 in the same group are arranged opposite to each other in the front and back directions, and match the slide rail structure fixed on the first slide 20, so that the two second slides in the group can slide synchronously in the front and back directions relative to the first slide 20 corresponding to them. The four bolt tightening shafts are matched one by one with the four second slides 40, and are fixedly connected to their respective corresponding second slides 40, so that they can move synchronously with the second slide 40 in the front and back directions relative to the first slide 20.

[0025] The main body of the bolt tightening shaft extends into the frame 10 , and the four shaft sleeves arranged at the lower end of the bolt tightening shaft extend downward relative to the frame 10 and extend to the outside of the frame 10 .

[0026] The first drive assembly 30 is fixed on the frame 10, and the two second drive assemblies 50 are respectively fixed on the two first slides 20. The first drive assembly 30 and the second drive assembly 50 each include a motor, a belt transmission mechanism and a screw transmission mechanism.

[0027] The motor on the first drive assembly 30 is matched with the input end of the corresponding belt transmission mechanism, so that the output end of the belt transmission mechanism is matched with the input end of the corresponding screw transmission mechanism, and the two first slides 20 are matched with the wire lever in the screw transmission mechanism to form a screw slider transmission mechanism, thereby achieving the purpose of the first drive assembly 30 driving the two first slides 20 to move synchronously in the left and right directions.

[0028] The motor on the second drive assembly 50 is matched with the input end of the corresponding belt transmission mechanism, so that the output end of the belt transmission mechanism is matched with the input end of the corresponding screw transmission mechanism, and the two second slides 40 in the same group are matched with the wire lever in the screw transmission mechanism to form a screw slider transmission mechanism, thereby achieving the purpose of the second drive assembly 50 driving the two second slides 40 to move synchronously in the left and right directions.

[0029] The above-mentioned solution of configuring the first drive assembly 30 and the second drive assembly 50 to include a motor, a belt drive mechanism and a screw drive mechanism helps to reduce the overall volume of the transmission mechanism / drive mechanism, making the entire device more compact and small, and convenient for flexible operation during operation.

[0030] A pair of linear rails extending in the front-to-back direction are fixed on each of the two first slides 20, and the paired linear rails are arranged alternately on the left and right; the two second slides 40 arranged on each first slide 20 are matched with the two linear rails, and the sleeve on the bolt tightening shaft corresponds to the lower side of the linear rail that is relatively on the inner side.

[0031] The first slide 20 is U-shaped. The two sleeves (i.e., sleeve 1 611 and sleeve 2 621, and sleeve 3 711 and sleeve 4 721) on the two bolt tightening shafts (i.e., rear bolt tightening shaft 1 61 and front bolt tightening shaft 1 62, and rear bolt tightening shaft 2 71 and front bolt tightening shaft 2 72) disposed on the paired second slides 40 extend into the U-shaped opening of the first slide 20. The U-shaped openings on the two first slides 20 are arranged opposite each other.

[0032] When the paired second slides 40 move relative to their mating first slides 20, the two sleeves can move back and forth within the U-shaped opening. Therefore, the U-shaped opening on the first slide 20 must have an appropriate forward and backward extension. When the U-shaped openings on the two first slides 20 approach each other, the four sleeves on the two sets of second slides 40 can also move closer together.

[0033] The second slide 40 is L-shaped, and its two end arms match the track structure configured on the first slide 20. The corner portion of the second slide 40 corresponds to the U-shaped opening on the first slide 20 and is fixedly matched with the sleeve on the bolt tightening shaft.

[0034] Setting the first slide 20 to be U-shaped and the second slide 40 to be L-shaped can make the front-to-back spacing and the left-to-right spacing of the four sleeves smaller when they are close to each other, which helps to broaden the scope of application of the four-axis adjustable spacing bolt tightening equipment and complete the tightening operation of four nuts with smaller spacing.

[0035] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. The present invention is susceptible to numerous improvements without departing from the overall concept. Those skilled in the art will appreciate the potential for modification or alteration of the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations accomplished by those skilled in the art without departing from the spirit and technical principles disclosed herein shall be encompassed by the claims of the present invention.

Claims

1. A bolt tightening device with adjustable four-axis spacing, comprising a frame and a bolt tightening axis; characterized in that: It also includes a pair of first slides fixed on the frame, and two pairs of second slides matching the first slides; the number of the bolt tightening shafts is four; The two first slides are arranged opposite to each other and can slide relative to the frame in the left and right directions; The four second slides are arranged in pairs into a group, and are matched with the two first slides respectively, and the two second slides in the same group are arranged front to back relative to each other and can slide relative to the first slides matched with them in the front to back direction; The bolt tightening shaft is matched with the second slide in a one-to-one manner, and is fixedly connected to the corresponding second slide respectively, and can move synchronously with the second slide relative to the first slide; the main body of the bolt tightening shaft extends into the frame and is fixed; the shaft sleeves arranged at the lower end of the bolt tightening shaft extend downward to the outside relative to the frame.

2. The four-axle spacing adjustable bolt tightening device according to claim 1 is characterized in that: A first drive assembly is fixed on the frame; the first drive assembly includes a motor, a belt drive mechanism and a screw drive mechanism, and the motor is matched with the input end of the belt drive mechanism, the output end of the belt drive mechanism is matched with the input end of the screw drive mechanism, and the two first slides are matched with the wire lever in the screw drive mechanism to drive the two first slides to move synchronously.

3. The four-axle spacing adjustable bolt tightening device according to claim 1 is characterized in that: A second drive assembly is fixed on each of the two first slides; the second drive assembly includes a motor, a belt drive mechanism and a screw drive mechanism, and the motor is matched with the input end of the belt drive mechanism, the output end of the belt drive mechanism is matched with the input end of the screw drive mechanism, and the two second slides in the same group are matched with the corresponding matching screw levers in the screw drive mechanism to drive the two groups of second slides to move synchronously.

4. The four-axle spacing adjustable bolt tightening device according to claim 3 is characterized in that: A pair of linear rails extending in the front-to-back direction are fixed on each of the two first slides, and the paired linear rails are arranged alternately left and right; the two second slides arranged on each first slide match the two linear rails at the same time, and the sleeve on the bolt tightening shaft corresponds to the lower side of the linear rail that is relatively on the inner side.

5. The four-axle spacing adjustable bolt tightening device according to any one of claims 1 to 4, characterized in that: The first slide is U-shaped, and the shaft sleeves of the two bolt tightening shafts arranged on the two paired second slides extend into the U-shaped openings of the first slide; the U-shaped openings on the two first slides are arranged opposite to each other.

6. The bolt tightening device with adjustable four-axle spacing according to claim 5, characterized in that: The second slide is L-shaped, and the two end arm sides match the track structure configured on the first slide; the corner portion of the second slide corresponds to the U-shaped opening on the first slide and matches the sleeve on the bolt tightening shaft.

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