Differential mechanism connecting bolt tightening tool

Abstract

The utility model provides a differential mechanism connecting bolt tightening tool. The differential mechanism connecting bolt tightening tool comprises a tightening wrench, a tightening sleeve and a counter-force block. Wherein the tightening sleeve is arranged on a shaft tube at the axis of the differential mechanism in a sleeving manner and is tightly clamped in the circumferential direction. A rotating shaft arranged at the rotating end of the counter-force block penetrates through a shaft hole in the axis of the tightening sleeve and extends into an axis hole of the differential mechanism. The tightening end of the counter-force block is connected with a tightening wrench used for tightening bolts in the circumferential direction of the differential mechanism. Compared with a tightening tool in the prior art, the tightening tool has the advantages that an external counter-force arm and additional equipment are omitted, fixation in the differential tightening process is reduced, and the production efficiency is improved. The tightening tool is simple in structure, convenient to operate and capable of controlling the torque and tracing torque data. In addition, different types of differential mechanism products can be installed and tightened by replacing the counter-force block through the tightening tool, and the production efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of differential technology, specifically to a differential connecting bolt tightening fixture. Background Technology

[0002] With the year-on-year increase in automobile sales, the demand for automotive production line parts has increased significantly, leading to longer delivery cycles, including for differentials. Furthermore, the installation process of the new differentials, resulting from technological improvements, differs from the original tightening process for reduction axle differentials. The old tightening robotic arms cannot be used in the existing areas, requiring the addition of new workstations to meet the demands of the new production cycle.

[0003] Based on the new layout and process requirements for the main reducer pre-assembly workstations, the differential tightening involves two rings of bolts, totaling 24 bolts. These bolts are evenly distributed on both sides of the differential's two circumferences and must be completed separately at one workstation using an electric tightening wrench to control the torque and track torque information. The original bolt tightening fixture was inefficient and could not meet the current differential installation requirements.

[0004] Therefore, there is an urgent need in this field for a tightening fixture that is quick to install, easy to control torque, widely applicable, convenient for information collection, and has a simple structure. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a differential connecting bolt tightening fixture to solve the problems of limited applicability, low tightening efficiency and complex structure in the prior art.

[0006] This utility model provides a differential connecting bolt tightening fixture, which includes: a tightening wrench, a clamping sleeve, and a reaction block. The clamping sleeve is sleeved on the shaft tube at the center of the differential and clamped in the circumferential direction. The rotating shaft of the rotating end of the reaction block passes through the shaft hole at the center of the clamping sleeve and extends into the shaft hole of the differential. The tightening end of the reaction block is connected to the tightening wrench for tightening the bolts in the circumferential direction of the differential.

[0007] Furthermore, the direction of extension of the reaction block is perpendicular to the axis of the differential.

[0008] Furthermore, the rotating end of the reaction block is provided with at least one rotating hole for mounting the rotating shaft.

[0009] Furthermore, the tightening end of the reaction block has a wrench hole, and the tightening head of the tightening wrench is locked in the wrench hole; the tightening head has a tightening sleeve for rotating and tightening the bolts on the differential.

[0010] Furthermore, the inner wall of the wrench hole and the tightening head have a spline structure for circumferential position restriction.

[0011] In this embodiment of the invention, the tightening wrench has a control module for setting the tightening torque and controlling the operation; the tightening wrench has a communication module electrically connected to the control module; and the tightening wrench also has a data interface for transmitting data.

[0012] Furthermore, the tightening wrench has a power module for supplying power.

[0013] As can be seen from the above embodiments, the differential connecting bolt tightening fixture provided by this utility model has at least the following advantages: Compared with the tightening fixtures in the prior art, this tightening fixture eliminates the external reaction arm and additional equipment, reduces the fixing during the differential tightening process, and improves production efficiency. Furthermore, this tightening fixture has a simple structure, is easy to operate, and can control the torque magnitude and trace the torque data. The reaction block is connected to the tightening wrench via a spline, ensuring reliable fixing and convenient disassembly. The connection between the sleeve clearance and the differential and reaction block ensures convenient operation of the differential during tightening, prevents movement due to tightening, and eliminates the need for external reaction arm support.

[0014] In addition, this tightening fixture can also be used to install and tighten different models of differential products by changing the reaction block, which greatly improves production efficiency.

[0015] It should be understood that the above general description and the following specific embodiments are merely exemplary and illustrative, and do not limit the scope of the present invention. Attached Figure Description

[0016] The accompanying drawings are part of the specification of this utility model and illustrate exemplary embodiments of the utility model. The drawings, together with the description in the specification, are used to illustrate the principles of this utility model.

[0017] Figure 1 This utility model provides a diagram showing the usage status of a differential connecting bolt tightening fixture.

[0018] Explanation of reference numerals in the attached figures:

[0019] 1-Tightening wrench, 2-Tightening sleeve, 3-Reaction block, 4-Differential gear;

[0020] 11-Tighten the head; 12-Tighten the sleeve;

[0021] 31 - Rotating shaft, 32 - Spline. Detailed Implementation

[0022] Various exemplary embodiments of the present invention are now described in detail. This detailed description should not be considered as a limitation of the present invention, but should be understood as a more detailed description of certain aspects, features and implementations of the present invention.

[0023] Various improvements and variations can be made to the specific embodiments described in this utility model without departing from the scope or spirit of this utility model, which will be obvious to those skilled in the art. Other embodiments derived from this utility model description will also be obvious to those skilled in the art. This application specification and embodiments are merely exemplary.

[0024] This utility model provides a tooling for tightening differential connecting bolts, such as... Figure 1 The diagram shows the tightening fixture in use. In a specific embodiment, the tightening fixture includes: a tightening wrench 1, a clamping sleeve 2, and a reaction block 3. The clamping sleeve 2 is fitted onto the shaft tube at the center of the differential 4 and is clamped in the circumferential direction. Specifically, during the tightening of the bolts, the clamping sleeve 2 and the differential 4 will not rotate relative to each other.

[0025] The rotating shaft 31 of the rotating end of the reaction block 3 passes through the shaft hole at the center of the clamping sleeve 2 and extends into the shaft hole of the differential 4. Specifically, the reaction block 3 can rotate relative to the clamping sleeve 2 and the differential 4, with the center of rotation at the shaft center of the differential 4.

[0026] The tightening end of the reaction block 3 is connected to a tightening wrench 1 for tightening the bolts in the circumferential direction of the differential 4. In this embodiment, the reaction block 3 is a long strip structure that can freely rotate around the axis of the clamping sleeve 2, and the extension direction of the reaction block 3 is perpendicular to the axis of the differential 4.

[0027] During bolt tightening, simply lift the reaction block 3 slightly and rotate it to the next bolt to be tightened, aligning the tightening wrench 1 with the bolt. Then lower the reaction block 3, engaging the lower end of the tightening wrench 1 with the bolt. Start tightening the bolt with the wrench 1, and repeat the process. The entire tightening process is simple and quick, greatly improving tightening efficiency.

[0028] Furthermore, the rotating end of the reaction block 3 is provided with at least one rotating hole for mounting the rotating shaft 31.

[0029] When two or more rotating holes are provided, the multiple rotating holes are distributed along the extension direction of the reaction block 3 to accommodate differentials 4 of different sizes, ensuring that the tightening wrench 1 at the tightening end of the reaction block 3 can correspond to the bolts on differentials 4 of different sizes.

[0030] Furthermore, the tightening end of the reaction block 3 has a wrench hole, and the tightening head 11 of the tightening wrench 1 is locked in the wrench hole.

[0031] The tightening head 11 has a tightening sleeve 12 for rotating and tightening the bolts on the differential 4.

[0032] Furthermore, a spline structure 32 is provided between the inner wall of the wrench hole and the tightening head 11 to limit the circumferential position, ensuring that the reaction block 3 and the tightening wrench 1 are in a relatively stationary state when tightening the bolt, and do not rotate relative to each other.

[0033] In a specific embodiment of this utility model, the tightening wrench 1 has a control module, a communication module, and a data interface. The control module is used to set the tightening torque and control the tightening operation of the wrench. The communication module is electrically connected to the control module and is used to connect to external devices for torque data transmission and parameter setting operations. The data interface can transmit and export the torque data from the tightening wrench 1 via a data cable, facilitating data storage and traceability.

[0034] Furthermore, the tightening wrench 1 has a power module for supplying power. The electric tightening wrench ensures convenient and reliable tightening during the tightening process, thereby meeting the requirements for reliable torque control and production cycle time.

[0035] The differential connecting bolt tightening fixture provided by this utility model can realize the functions of bolt installation and tightening, and torque traceability during differential assembly. Furthermore, different models of differentials 3 can be installed and tightened by adjusting different rotating holes on the reaction block 3 of the rotating shaft 31 and by replacing the reaction block 3.

[0036] In addition, the reaction block 3 is connected to the tightening wrench 1 by the spline, which is reliable and easy to disassemble. The sleeve 2 is connected to the differential 4 and the reaction block 3 by the clearance fit, which cancels the tightening torque of the differential 4 during the tightening process. The differential will not move due to the tightening process, and no external reaction arm is required, which greatly simplifies the structure of the entire tooling.

[0037] The above description is merely an illustrative embodiment of this utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of this utility model shall fall within the scope of protection of this utility model.

Claims

1. A fixture for tightening differential connecting bolts, characterized in that, The tightening fixture includes: a tightening wrench (1), a tightening sleeve (2), and a reaction block (3), wherein, The clamping sleeve (2) is sleeved on the shaft tube at the center of the differential (4) and clamped in the circumferential direction; The rotating shaft (31) provided at the rotating end of the reaction block (3) passes through the shaft hole at the center of the clamping sleeve (2) and extends into the shaft hole of the differential (4); The tightening end of the reaction block (3) is connected to the tightening wrench (1) for tightening the bolts in the circumferential direction of the differential (4).

2. The differential connecting bolt tightening fixture according to claim 1, characterized in that, The direction of extension of the reaction block (3) is perpendicular to the axis of the differential (4).

3. The differential connecting bolt tightening fixture according to claim 2, characterized in that, The rotating end of the reaction block (3) is provided with at least one rotating hole for mounting the rotating shaft (31).

4. The differential connecting bolt tightening fixture according to claim 2 or 3, characterized in that, The tightening end of the reaction block (3) has a wrench hole, and the tightening head (11) of the tightening wrench (1) is locked in the wrench hole; The tightening head (11) has a tightening sleeve (12) for rotating and tightening the bolts on the differential (4).

5. The differential connecting bolt tightening fixture according to claim 4, characterized in that, The inner wall of the wrench hole and the tightening head (11) have a spline structure (32) for circumferential position restriction.

6. The differential connecting bolt tightening fixture according to claim 1, characterized in that, The tightening wrench (1) has a control module for setting the tightening torque and controlling the operation; The tightening wrench (1) is equipped with a communication module that is electrically connected to the control module; The tightening wrench (1) also has a data interface for transmitting data.

7. The differential connecting bolt tightening fixture according to claim 6, characterized in that, The tightening wrench (1) has a power module for supplying power.

Images