A hoist for bevel gears

Abstract

The utility model discloses a hoist of driving bevel gear relates to hoisting equipment technical field. The hoist includes the lifting ring, and the bottom of lifting ring is connected with the connecting seat, and the lower end of connecting seat is hinged with two downward setting upper connecting rods, and the lower end of upper connecting rod all is hinged with lower connecting rod, and lower connecting rod cross hinged, and the lower end of lower connecting rod all is connected with the clamping arm, and the lower end of clamping arm is equipped with the arc claw, one clamping arm is positioned through the inner side wall of arc claw and the outer circumferential wall of bearing mounting seat, and the other clamping arm is positioned through the inner side wall of arc claw and the outer circumferential wall of tooth end flange, to hold the driving bevel gear together. The utility model can be in the case of no manual auxiliary adjustment, and the driving bevel gear is accurately embedded in the inner cavity assembly station of main reduction shell with the fixed posture of " the shaft end is downward, and the tooth end is upward", thereby improves the assembly quality and efficiency of automobile main speed reducer, and reduced the assembly cost, thereby solves the problem of existing driving bevel gear assembly technology.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts assembly tools, and in particular to a device for lifting the drive bevel gear during the assembly of an automotive main reducer. Background Technology

[0002] In the automotive manufacturing industry, the final drive is a core component of the vehicle's transmission system. Its assembly quality directly determines the vehicle's power transmission efficiency, driving stability, and handling safety, making it a crucial factor in ensuring the overall performance of the vehicle. The drive bevel gear, as the core power transmission element within the final drive, undertakes the core functions of power transmission, speed conversion, and torque regulation. Its assembly precision, installation posture, and surface integrity have a decisive impact on the final drive's transmission accuracy, load-bearing capacity, and service life, thus affecting the vehicle's power performance and driving reliability.

[0003] In the standardized assembly process of automotive main reducers, the assembly posture of the driving bevel gear has strict technical requirements: it must be precisely inserted into the inner cavity of the main reducer housing in a fixed posture with the shaft end facing down and the tooth end facing up, while the inner cavity of the main reducer housing must remain facing upwards during assembly. The core purpose of this specific assembly posture is to ensure that the driving bevel gear, after being installed, can form a precise meshing relationship with key components such as the driven bevel gear in the main reducer housing, ensuring that the gear meshing clearance meets the design standards, thereby achieving stable and efficient power transmission, avoiding problems such as transmission jamming, abnormal noise, or accelerated wear caused by assembly posture deviations, and ensuring the core transmission performance of the main reducer.

[0004] Currently, in the automotive manufacturing industry, there is no specialized and standardized lifting tool solution for the lifting operations of the aforementioned specific assembly posture of the drive bevel gear. Existing lifting methods mainly rely on ordinary hooks or temporary self-made clamps. Such solutions have significant technical defects and quality risks, specifically as follows: Firstly, the attitude control precision is insufficient. The structural design of ordinary hooks and temporary clamps is not optimized for the assembly posture of the driving bevel gear with the shaft end facing down and the tooth end facing up. Lacking attitude positioning and locking mechanisms, the driving bevel gear is prone to deflection and tilting during hoisting, making it difficult to quickly and accurately align with the assembly station when it is hoisted above the main reduction housing cavity. Therefore, in actual operation, operators often need to manually adjust the attitude of the driving bevel gear.

[0005] Secondly, the surface quality of the parts is easily damaged. During manual adjustment, the driving bevel gear lacks stable constraint protection, and its precision surfaces such as tooth surfaces and journals are easily scratched or collided with the inner edge of the main reducer housing or surrounding tooling, causing surface defects such as tooth surface scratches and journal wear. These defects not only affect the appearance qualification rate of the parts, but also damage the accuracy of the gear meshing surface and the fitting accuracy of shaft parts, leading to impact loads during the transmission of the main reducer, shortening the service life of the main reducer, and even causing driving safety hazards.

[0006] Third, the assembly quality is unstable. The subjectivity and randomness of manual operation lead to differences in the posture adjustment accuracy of different operators and different work batches, which cannot guarantee the consistency of the assembly posture of the drive bevel gear. This results in excessive fluctuations in gear meshing clearance, and some assembled products exhibit quality problems such as reduced transmission efficiency and abnormal noise.

[0007] Fourth, labor and management costs are relatively high. To ensure assembly quality, the company needs to employ dedicated operators for posture adjustment and also needs to add a quality inspection process to test the meshing accuracy of the assembled main reducer, resulting in a significant increase in labor and management costs. In addition, problems such as parts scrapping and rework caused by improper hoisting further exacerbate the company's production cost pressure. Summary of the Invention

[0008] This utility model provides a lifting device for an active bevel gear. This device can accurately embed the active bevel gear into the inner cavity of the main reducer housing in a fixed posture with the shaft end facing down and the tooth end facing up without manual adjustment. This improves the assembly quality and efficiency of the automotive main reducer, reduces the assembly cost, and solves the above-mentioned problems existing in the current active bevel gear assembly technology.

[0009] To solve the above problems, the technical solution adopted by this utility model is: The driving bevel gear includes a bearing mounting base and a tooth end flange. The lifting device for the driving bevel gear includes a lifting ring. The bottom of the lifting ring is connected to a connecting seat. The lower end of the connecting seat is hinged to two downward-facing upper connecting rods via a hinge shaft. The lower ends of the two upper connecting rods are each hinged to a lower connecting rod via a hinge shaft. The two lower connecting rods are cross-hinged via hinge shafts, and the lower end of each lower connecting rod is connected to a clamping arm. The lower end of each clamping arm is provided with an arc-shaped claw. One clamping arm is positioned by its inner sidewall of the arc-shaped claw against the outer peripheral wall of the bearing mounting base, and the other clamping arm is positioned by its inner sidewall of the arc-shaped claw against the outer circular wall of the tooth end flange, so as to jointly hold and clamp the driving bevel gear.

[0010] A more specific technical solution than the above-mentioned technical solution may be that the inner wall of the arc-shaped claw is an arc surface adapted to the clamping surface.

[0011] Furthermore, each of the hinge shafts is fitted with a wear-resistant bushing.

[0012] Furthermore, a limiting block is provided below the hinge point between the upper ends of the two upper connecting rods and the connecting seat to limit the relative contraction angle of the two upper connecting rods.

[0013] Furthermore, the arc-shaped jaws are made of copper with a hardness of HRB50-80.

[0014] Furthermore, the lifting ring and the connecting seat are detachably connected by threads.

[0015] By adopting the above technical solution, this utility model has the following beneficial effects compared with the prior art: The core working mechanism of this utility model is "adaptive clamping + attitude locking". Through the cooperation of the linkage hinge structure and the arc-shaped claws, the precise hoisting and assembly of the active bevel gear with the shaft end facing down and the tooth end facing up is achieved. Specifically, the two arc-shaped claws fit and hold the outer peripheral wall of the bearing mounting seat and the outer circular wall of the tooth end flange of the active bevel gear respectively. The "two-point support" is formed by the structure of the parts themselves, which forcibly locks the gear attitude and ensures that there is no deviation with the "shaft end facing down and tooth end facing up" during hoisting. Therefore, when hoisted to the main reduction housing assembly station, the active bevel gear is already in the preset assembly attitude and can be directly and accurately embedded into the station without manual adjustment, realizing "hoisting and alignment". Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the working state of this utility model – clamping. Figure 1 .

[0018] Figure 3 Schematic diagram of the assembly of this utility model Figure 2 .

[0019] Figures 1-3 In the diagram, the following components are labeled: 1 – driving bevel gear, 1-1 – bearing mounting seat, 1-2 – tooth end flange, 2 – lifting ring, 3 – connecting seat, 4 – hinge shaft, 5 – upper connecting rod, 6 – lower connecting rod, 7 – clamping arm, 8 – arc-shaped pawl, 9 – main reducer housing, 10 – wear-resistant bushing, and 11 – limit block. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings: Example

[0021] like Figure 1 As shown, a lifting device for an active bevel gear 1 includes a bearing mounting seat 1-1 and a tooth end flange 1-2. The lifting device includes a lifting ring 2, with a connecting seat 3 connected to the bottom of the lifting ring 2. The lower end of the connecting seat 3 is hinged to two downwardly positioned upper connecting rods 5 via a hinge shaft 4. The lower ends of the two upper connecting rods 5 are each hinged to a lower connecting rod 6 via a hinge shaft 4. The two lower connecting rods 6 are cross-hinged via the hinge shaft 4, and the lower end of each lower connecting rod 6 is connected to a clamping arm 7. Each clamping arm 7 has an arc-shaped claw 8 at its lower end. When the lifting ring 2 is pulled upward by a lifting force, the connecting seat 3 drives the two upper connecting rods 5 to retract, thereby pulling the cross-hinged lower connecting rods 6 to retract synchronously, causing the arc-shaped claws 8 of the two clamping arms 7 to move closer to the active bevel gear 1 from both sides, achieving the purpose of "self-adaptive clamping".

[0022] One clamping arm 7 is positioned by its inner wall of the arc-shaped claw 8 against the outer peripheral wall of the bearing mounting seat 1-1, while the other clamping arm 7 is positioned by its inner wall of the arc-shaped claw 8 against the outer circular wall of the tooth end flange 1-2, together holding and clamping the driving bevel gear 1. That is, the two arc-shaped claws 8 respectively hold and clamp the driving bevel gear 1 against the outer peripheral wall of the bearing mounting seat 1-1 and the outer circular wall of the tooth end flange 1-2, forming a "two-point support" using the structure of the parts themselves, forcibly locking the posture of the driving bevel gear 1, ensuring that there is no deflection during hoisting with the shaft end facing down and the tooth end facing up.

[0023] When the above-mentioned technical solution is used to hoist the active bevel gear 1 to the assembly station of the main reducer housing 9, the active bevel gear 1 is already in the preset assembly posture. Therefore, it can be directly and accurately embedded into the station without manual adjustment, realizing "hoisting and positioning". This solves the problems of insufficient control precision, easy damage to the surface quality of parts, poor assembly quality stability, and high labor and management costs in the existing active bevel gear 1 posture hoisting method.

[0024] Preferably, the inner wall of the arc-shaped claw 8 is designed as an arc surface that matches the clamping surface, thereby increasing the contact area between the arc-shaped claw 8 and the surface of the active bevel gear 1, improving clamping stability, and preventing the active bevel gear 1 from "slipping" during hoisting.

[0025] Preferably, each hinge shaft 4 is fitted with a wear-resistant bushing 10. This reduces frictional loss at the hinge point, extends the service life of the lifting device, ensures smooth linkage operation, prevents clamping jamming and attitude shifting caused by wear, and ensures stability during the lifting process. Preferably, the wear-resistant bushing can be made of copper.

[0026] Preferably, a limiting block 11 is provided below the hinge point between the upper ends of the two upper connecting rods 5 and the connecting seat 3 to limit the relative retraction angle of the two upper connecting rods 5. This prevents excessive retraction of the upper connecting rods 5, which could lead to excessive pressure on the clamping arm 7 and avoid deformation of the surface of the active bevel gear 1 or damage to the arc-shaped pawl 8. At the same time, since the limiting block 11 limits the maximum retraction range of the clamping arm 7, it can ensure the consistency of clamping force and posture in each hoisting operation, further improving the stability of assembly accuracy.

[0027] Preferably, the arc-shaped chuck 8 is made of copper with a hardness of HRB50-80. Copper has a low hardness (HRB50-80) and combines flexibility and wear resistance, which can prevent the arc-shaped chuck 8 from scratching or colliding with the tooth surface of the drive bevel gear 1, journal and other precision surfaces, thus protecting the integrity of the parts surface.

[0028] Preferably, the lifting ring 2 and the connecting seat 3 are detachably connected by threads. This not only facilitates the disassembly, maintenance, and replacement of the lifting device—when the lifting ring 2 or the connecting seat 3 is damaged, the component can be replaced individually without scrapping the entire lifting device, thus reducing operating costs—but also adapts to different lifting scenarios: different specifications of lifting rings can be replaced according to actual lifting requirements (such as lifting height and force), improving the versatility of the lifting device.

[0029] The workflow of this utility model is as follows: ① Clamping: such as Figure 2 As shown, the operator lowers the entire lifting device of this utility model above the active bevel gear 1, adjusts the position of the lifting device so that the two arc-shaped claws 8 correspond to the outer peripheral wall of the bearing mounting seat 1-1 and the outer circular wall of the tooth end flange 1-2 of the active bevel gear 1 respectively; ② Lifting: The lifting equipment continuously pulls the lifting device upward, causing the clamped drive bevel gear 1 to leave the storage position and be lifted to the area above the main reducer housing 9 assembly area; during the lifting process, the lifting traction force is converted into a continuous clamping force through the linkage structure, and the arc-shaped claw 8 is in close contact with the surface of the drive bevel gear 1 without relative sliding. At this time, the drive bevel gear 1 always maintains a fixed posture with the shaft end facing down and the tooth end facing up; ③ Assembly: such as Figure 3 As shown, the drive bevel gear 1, which is hoisted to the top of the main reducer housing 9, is aligned with the assembly station inside the main reducer housing 9, and the hoisting device is slowly lowered. Since the hoisting device has locked the preset assembly posture of the drive bevel gear 1, the shaft end of the drive bevel gear 1 is automatically aligned with the central axis of the assembly station, and the posture can be "hoisted and aligned" without manual adjustment. The matching arc surface of the arc-shaped claw 8 ensures that the drive bevel gear 1 is subjected to balanced force and there is no posture deviation during the lowering process. ④ Release: After confirming that the active bevel gear 1 is fully embedded in the assembly station and in the correct position, control the hoisting equipment to stop traction and slowly lower the lifting device; at this time, after the traction force of the lifting device decreases or disappears, the upper / lower connecting rods naturally open under their own weight and the reaction force of the active bevel gear 1 on the arc-shaped pawl 8, causing the two clamping arms 7 to separate to both sides, and the arc-shaped pawl 8 to disengage from the clamping surface of the active bevel gear 1.

[0030] It should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A lifting device for a driving bevel gear, the driving bevel gear comprising a bearing mounting base and a tooth end flange, characterized in that: The device includes a lifting ring, the bottom of which is connected to a connecting seat. The lower end of the connecting seat is hinged to two downward-facing upper connecting rods via hinge shafts. The lower ends of the two upper connecting rods are each hinged to a lower connecting rod via hinge shafts. The two lower connecting rods are cross-hinged via hinge shafts, and the lower end of each lower connecting rod is connected to a clamping arm. Each clamping arm has an arc-shaped claw at its lower end. One clamping arm is positioned against the outer peripheral wall of the bearing mounting seat through the inner side wall of its arc-shaped claw, and the other clamping arm is positioned against the outer circular wall of the tooth end flange through the inner side wall of its arc-shaped claw, so as to jointly hold and clamp the driving bevel gear.

2. The lifting device for the active bevel gear according to claim 1, characterized in that: The inner wall of the arc-shaped claw is an arc surface adapted to the clamping surface.

3. The lifting device for the driving bevel gear according to claim 1 or 2, characterized in that: Each of the hinge shafts is fitted with a wear-resistant bushing.

4. The lifting device for the driving bevel gear according to claim 3, characterized in that: Below the hinge joint between the upper ends of the two upper connecting rods and the connecting seat, there is a limiting block for limiting the relative contraction angle of the two upper connecting rods.

5. The lifting device for the active bevel gear according to claim 4, characterized in that: The arc-shaped chuck is made of copper with a hardness of HRB50-80.

6. The lifting device for the active bevel gear according to claim 5, characterized in that: The lifting ring and the connecting seat are detachably connected by threads.

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