A bushing diameter reduction and riveting and flanging integrated structure

Abstract

The utility model discloses a bushing shrinkage and riveting pressure flanging integrated structure relates to bushing production technical field, including lower limit ring, and the inside of lower limit ring is equipped with the base of cooperation, and the upper portion outside of base is equipped with a plurality of evenly distributed sliding slot, and the sliding slot is equipped with the slider of cooperation, and the upper surface of slider all is equipped with the shrinkage block, and the outside cooperation of shrinkage block is equipped with the shrinkage ring, the utility model discloses the flanging mode of shrinkage block circumferential even force application eliminates the axial stress concentration of traditional up and down force application, has reduced the product inner leakage rate, has guaranteed the damping characteristic of liquid filling bushing spare, and shrinkage block adopts the design of similar "bracket" shape, can make up and down flanging action contact with shrinkage block simultaneously, effectively prevents the liquid filling bushing and floats up in frock, thereby avoids flanging deviation, thereby avoids the damage of traditional mode up and down force application to the sealing structure in the liquid filling bushing cavity, has improved the production efficiency of product and reduced the comprehensive cost.

Description

Technical Field

[0001] This utility model relates to the field of bushing production technology, specifically to an integrated structure of bushing diameter reduction and riveting flange. Background Technology

[0002] In the automotive and construction machinery industries, liquid-filled bushings are used as key shock-absorbing and buffering components in core parts such as chassis and suspension systems. Their performance directly affects the operational stability, shock absorption effect, and service life of the equipment. During the processing of liquid-filled bushings, diameter reduction and flanging riveting are required to ensure the stability and sealing performance of the bushing structure.

[0003] In existing technology, the processing of the liquid-filled bushing for the vehicle body swing arm requires multiple independent processes, the specific process of which is as follows: First, after the bushing completes the internal liquid filling operation and achieves initial sealing, it needs to be transferred to the diameter reduction station. A special diameter reduction fixture is used to precisely reduce the outer diameter of the bushing, ensuring that its outer diameter is strictly controlled within the design specifications. After the diameter reduction process is completed, the bushing is removed from the diameter reduction fixture and transferred to the riveting station of another special equipment. The upper and lower force application mechanisms on the riveting fixture of this equipment apply uniform pressure to both ends of the bushing to complete the riveting and flanging operation (e.g., ...). Figure 8 and Figure 9 (As shown in the image) This processing mode has significant drawbacks: First, the process is cumbersome and inefficient. The bushings need to be manually or mechanically transferred between different equipment and workstations for diameter reduction and riveting / flanging, which increases the operation time of the intermediate transfer links. It is also easy for the bushing posture to shift during subsequent riveting / flanging due to positioning deviations during the transfer process, affecting the processing accuracy. Second, there is a significant quality hazard (internal leakage risk). During multiple transfers, the bushings may be subjected to collisions and vibrations, damaging the initial sealing structure and seriously affecting the bushing's shock absorption performance and service life. Third, the overall cost is high. Separate diameter reduction equipment and riveting equipment require separate investment in procurement funds, and the operation of the equipment requires dedicated operators. At the same time, the multi-process processing extends the production cycle and reduces the output efficiency per unit time. Fourth, the site utilization rate is low. The diameter reduction workstation and the riveting workstation need to occupy separate production spaces, resulting in a scattered production site layout and difficulty in improving the production output efficiency per unit area.

[0004] Patent CN204284279U discloses a shock-absorbing bushing diameter reduction device. The axial cross section of the sleeve is funnel-shaped. A base is fixed at the bottom of the sleeve, a pad is fixed on the base inside the sleeve, and a top plate is fixed above the pad. The device also includes a movable diameter reduction block, which forms a diameter reduction ring that cooperates with the inner wall of the sleeve's diameter-changing part.

[0005] However, this patent has the following drawbacks: the device can only perform diameter reduction on the bushing, and when riveting and flanging the bushing, it needs to be transferred to another tooling for work, resulting in low production efficiency. In addition, the bushing is subjected to collision and vibration during the transfer process, which damages the initial sealing structure and seriously affects the bushing's shock absorption performance and service life. Utility Model Content

[0006] To address the technical challenges in existing technologies, such as the need to transfer bushings across equipment and workstations during diameter reduction and riveting / flanging, which increases transfer time and causes collisions and vibrations during multiple transfers, damaging the bushing's sealing structure, affecting its shock absorption performance, and shortening its service life, this utility model provides an integrated structure for bushing diameter reduction and riveting / flanging.

[0007] The objective of this utility model can be achieved through the following technical solutions: A bushing diameter reduction and riveting flange integrated structure includes a lower limiting ring, a matching base inside the lower limiting ring, multiple evenly distributed sliding grooves on the upper outer side of the base, matching sliders inside the sliding grooves, diameter reduction blocks on the upper surface of the sliders, and diameter reduction rings matching the outer side of the diameter reduction blocks.

[0008] Furthermore, the base is circular in shape, the slide groove and the slider are both T-shaped, and the outer side of the lower limit ring is provided with evenly arranged first bolt holes.

[0009] Furthermore, the outer side of the slider is equipped with fixing bolts, and one end of the fixing bolt is a spring near the slider, with the other end of the spring connected to the slider.

[0010] Furthermore, the base has a slot inside, and a support seat is fitted inside the slot. The upper surface of the support seat has a bushing body.

[0011] Furthermore, the height of the reducing block is greater than the height of the bushing body. The side of the reducing block closest to the bushing body has a reducing surface, which is shaped like a bracket. The upper and lower ends of the reducing surface have rounded portions. The side of the reducing block furthest from the bushing body has an inclined surface.

[0012] Furthermore, the inner ring surface of the reducing ring is tapered, and the tapering of the inner ring surface of the reducing ring is matched with the inclined action surface of the reducing block. The inner ring diameter of the reducing ring gradually increases from top to bottom, and the height of the support base is lower than the height of the slot.

[0013] The beneficial effects of this utility model are: This invention eliminates the axial stress concentration caused by traditional top-to-bottom force application through a circumferentially uniform force-applying flanging method using a diameter reduction block. This reduces the internal leakage rate of the product, ensures the damping characteristics of the filling liner kit, and significantly improves vehicle ride comfort and handling stability. Furthermore, the diameter reduction block's bracket-like design allows simultaneous contact between the top and bottom flanging actions, effectively preventing the filling liner from floating up and down in the tooling, thus avoiding flanging offset and ensuring consistency and stability during processing. It replaces the traditional method of first reducing the diameter with a straight-end diameter reduction block and then applying top-to-bottom force for riveting. The diameter reduction tooling achieves the traditional two-step process in one step, thus avoiding damage to the sealing structure inside the filling liner cavity caused by the traditional top-to-bottom force application. This improves production efficiency and reduces overall costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a front sectional view of the present invention; Figure 3 This is an exploded view of the present invention; Figure 4 This is an exploded view of the groove and slider of this utility model; Figure 5 This is a schematic diagram of the bushing body structure of this utility model; Figure 6 This is a schematic diagram of the diameter reduction block structure of this utility model; Figure 7 This is a schematic diagram of the connection between the spring and the slider in this utility model; Figure 8 This is a schematic diagram of the prior art diameter reduction tooling of this utility model; Figure 9 This is a schematic diagram of the riveting fixture in the prior art of this utility model.

[0015] The attached diagram lists the components represented by each number as follows: 1. Lower limit ring; 101. First bolt hole; 2. Reduction ring; 201. Second bolt hole; 3. Reduction block; 301. Reduction action surface; 302. Inclined action surface; 4. Fixing bolt; 5. Slider; 6. Base; 7. Slide groove; 8. Slot; 9. Support seat; 10. Bushing body; 11. Spring. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-2 As shown, a bushing diameter reduction and riveting flange integrated structure includes a lower limiting ring 1. A first bolt hole 101 is opened on the outer side of the lower limiting ring 1. The first bolt holes 101 are evenly distributed around the outer side of the lower limiting ring 1. The first bolt holes 101 are used to fix the lower limiting ring 1 to the base 6.

[0018] Please see Figure 3-5 and Figure 7 As shown, the lower limit ring 1 has a matching base 6 inside. The base 6 is circular in shape. Multiple evenly distributed sliding grooves 7 are opened on the upper outer side of the base 6. The sliding grooves 7 are T-shaped. Matching sliders 5 are provided in the sliding grooves 7. The sliders 5 are T-shaped. Fixing bolts 4 are provided on the outer side of the sliders 5. A spring 11 is provided at one end of the fixing bolt 4 near the slider 5. One end of the spring 11 is connected to the slider 5. The spring 11 is used to reset the slider 5. The fixing bolts 4 are matched with the first bolt hole 101. The base 6 has a slot 8 inside. A support seat 9 is matched in the slot 8. A bushing body 10 is provided on the upper surface of the support seat 9.

[0019] Please see Figure 5-6 As shown, the upper surface of the slider 5 is provided with a diameter reduction block 3. The height of the diameter reduction block 3 is greater than the height of the bushing body 10. The side of the diameter reduction block 3 closest to the bushing body 10 is provided with a diameter reduction action surface 301. The diameter reduction action surface 301 is shaped like a "bracket". The upper and lower ends of the diameter reduction action surface 301 are provided with arc portions. The side of the diameter reduction block 3 away from the bushing body 10 is provided with an inclined action surface 302.

[0020] A diameter reduction ring 2 is provided on the outer side of the diameter reduction block 3. The inner ring surface of the diameter reduction ring 2 is tapered. The tapered surface of the inner ring surface of the diameter reduction ring 2 is matched with the inclined action surface 302 of the diameter reduction block 3.

[0021] The inner diameter of the reducing ring 2 gradually increases from top to bottom, which makes it easier to press the reducing ring 2 onto the outside of the reducing block 3; the upper surface of the reducing ring 2 is provided with a second bolt hole 201.

[0022] First, place the base 6 in the inner ring of the lower limit ring 1. The lower limit ring 1 has a limiting effect on the base 6. Then, place the support seat 9 and the bushing body 10 in the slot 8. The height of the support seat 9 is lower than the height of the slot 8.

[0023] Then, the reducing ring 2 is pressed down from top to bottom, the spring 11 is shortened, and the slider 5 moves simultaneously in the groove 7 toward the bushing body 10. The movement of the slider 5 drives the reducing block 3 to move simultaneously toward the bushing body 10; thus realizing the reduction of the bushing body and the riveting and flanging of both ends.

[0024] The design of the reducing block 3 allows the upper and lower flanging actions to contact the reducing block 3 simultaneously, effectively preventing the liquid filling bushing from floating up and down in the tooling, thereby avoiding flanging offset and ensuring the consistency and stability of the processing.

[0025] The flange method, which uses uniformly arranged diameter reduction blocks to apply force evenly in three circumferences, eliminates the axial stress concentration caused by the traditional top and bottom force application. The internal leakage rate of the product is reduced from 3% to 5% in the traditional process to less than 0.1%, ensuring the damping characteristics of the liquid filling liner kit and significantly improving vehicle ride comfort and handling stability.

[0026] The riveting and flange reducing block 3 adopts a design similar to a "bracket". It replaces the traditional method of first reducing the diameter of the straight end reducing block 3 and then applying force from top to bottom to rivet. The reducing tooling achieves the traditional two-step process in one reduction, thereby avoiding the damage to the sealing structure inside the liquid filling bushing cavity caused by the traditional method of applying force from top to bottom. This greatly improves production efficiency and reduces overall costs.

[0027] Working principle: First, the base 6 of the bushing body 10 is placed into the inner ring cavity of the lower limit ring 1. The lower limit ring 1 provides stable support for the base 6 through radial constraint, ensuring that the base 6 will not shift horizontally during subsequent processing. Then, the support seat 9 and the bushing body 10 are placed in the pre-set slot 8 of the tooling. It is necessary to ensure that the top surface of the support seat 9 is lower than the upper opening of the slot 8, so as to reserve sufficient space for the subsequent diameter reduction riveting process.

[0028] Then, the reducing ring 2 is driven to apply pressure to the tooling body from top to bottom in the vertical direction; under the pressure, the spring 11 inside the tooling is compressed and shortened, which in turn pushes the slider 5 to move synchronously along the preset groove 7 towards the central axis of the bushing body 10; the synchronous movement of the slider 5 will drive multiple sets of reducing blocks 3 to move towards the bushing body 10 at the same time, and finally complete the reducing and shaping of the bushing body and the riveting and flanging of the two ends of the bushing in one go.

[0029] This ensures that the flanging action at both ends of the bushing contacts and is subjected to force by the reducing block 3 at the same time. This effectively limits the vertical movement of the liquid-filled bushing within the tooling and avoids the problem of flanging offset caused by asynchronous force application. Ultimately, this guarantees the consistency of product dimensions and the stability of the production process during batch processing.

[0030] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A bushing diameter reduction and riveting flange integrated structure, comprising a lower limiting ring (1), characterized in that, The lower limit ring (1) is provided with a matching base (6). Multiple evenly distributed sliding grooves (7) are provided on the upper outer side of the base (6). Matching sliders (5) are provided in the sliding grooves (7). A reduction block (3) is provided on the upper surface of the slider (5). A reduction ring (2) is provided on the outer side of the reduction block (3).

2. The bushing diameter reduction and riveting flange integrated structure according to claim 1, characterized in that, The base (6) is in the shape of a ring, and the slide groove (7) and the slider (5) are both T-shaped. The outer side of the lower limit ring (1) is provided with first bolt holes (101) arranged in a uniform manner.

3. The bushing diameter reduction and riveting flange integrated structure according to claim 2, characterized in that, Each slider (5) is provided with a fixing bolt (4) on its outer side. The fixing bolt (4) is connected to a spring (11) at one end of the slider (5). One end of the spring (11) is connected to the slider (5).

4. The bushing diameter reduction and riveting flange integrated structure according to claim 3, characterized in that, The base (6) has a slot (8) inside, and a support seat (9) is provided in the slot (8). The upper surface of the support seat (9) is provided with a bushing body (10).

5. The bushing diameter reduction and riveting flange integrated structure according to claim 4, characterized in that, The height of the reducing block (3) is greater than the height of the bushing body (10). The reducing block (3) has a reducing action surface (301) on the side close to the bushing body (10). The shape of the reducing action surface (301) is "bracket". The upper and lower ends of the reducing action surface (301) are provided with arc parts. The reducing block (3) has an inclined action surface (302) on the side away from the bushing body (10).

6. The bushing diameter reduction and riveting flange integrated structure according to claim 5, characterized in that, The inner ring surface of the reduced diameter ring (2) is tapered. The tapered inner ring surface of the reduced diameter ring (2) is matched with the inclined action surface (302) of the reduced diameter block (3). The inner ring diameter of the reduced diameter ring (2) gradually increases from top to bottom. The height of the support base (9) is lower than the height of the slot (8).

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