Hot strong pressing tool for return spring set

Abstract

The utility model relates to the field of spring manufacturing, and aims to provide a hot strong pressing tool for a return spring set, which solves the problem that a plurality of springs are difficult to compress and heat at the same time, and comprises a pressing component and a positioning component, the pressing component comprises a core column and a pressing sleeve, a ring disc is arranged at the bottom of the core column, and the positioning component is arranged on the ring disc. A compression area is formed between the pressing sleeve and the annular disc, the core column is sleeved with the positioning assembly, and the positioning assembly is located in the compression area; the positioning assembly comprises at least two lantern rings, the lantern ring on the bottom layer is flatly laid on the ring disc, a plurality of positioning pieces are arranged, the positioning pieces are used for penetrating springs, the springs are arranged on the positioning pieces in a sleeving mode, the pressing sleeve is pressed on the lantern ring on the uppermost layer, and the springs start to retract from the natural stretching state till the springs retract to the set length range. And then the tool and the springs are sent to a tempering furnace to be heated, so that the multiple springs can be compressed and heated at a time, and the problem that the multiple springs are difficult to compress and heat at the same time is solved.

Description

Technical Field

[0001] This utility model relates to the field of spring manufacturing, and in particular to a hot-pressing tooling for a return spring assembly. Background Technology

[0002] Currently, during the assembly of spring components, the spring components are subjected to high-pressure treatment at room temperature. However, this process does not meet the requirement that the load loss in the thermal constant temperature test is less than 6%, and the product performance cannot meet the standards and production process requirements.

[0003] The return spring assembly used in automotive transmission clutches has high requirements for thermal decay performance, which cannot be met by ordinary cold-pressing processes. Utility Model Content

[0004] The purpose of this invention is to provide a hot-pressing tool for a spring assembly, which solves the problem of difficulty in simultaneously compressing and heating multiple springs.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] This utility model provides a hot-pressing fixture for a return spring assembly, including a pressing component and a positioning component.

[0007] The pressing assembly includes a core column and a pressing sleeve. A ring disk is provided at the bottom of the core column. A compression zone is formed between the pressing sleeve and the ring disk. The pressing sleeve has a cavity. The core column is sleeved in the cavity. The positioning assembly is sleeved on the core column and is located in the compression zone.

[0008] The positioning assembly includes at least two collars, with the bottom collar laid flat on the ring disc, and a compression zone formed between two adjacent collars. At least one collar is provided with multiple positioning elements, which are located within the compression zone. The positioning elements are used to insert springs, and the pressure sleeve is used to press on the top collar.

[0009] Optionally, the collar includes a thick ring and a thin ring, with the thick ring disposed between the two thin rings.

[0010] Furthermore, the positioning element includes an upper top post and a lower top post, which are respectively disposed on the two end faces of the thick ring, with the upper top post and the lower top post being disposed opposite to each other.

[0011] Furthermore, a first positioning ring and a second positioning ring are respectively provided on the two thin rings. The first positioning ring is located in the extension direction of the upper top column, and the second positioning ring is located in the extension direction of the lower top column. The first positioning ring and the second positioning ring are used to sleeve the spring.

[0012] Furthermore, the two thin rings are respectively provided with a first clearance hole and a second clearance hole, the first clearance hole communicating with the first positioning ring and the second clearance hole communicating with the second positioning ring.

[0013] Optionally, the pressing assembly further includes a pressure ring for pressing onto the uppermost collar, and the pressure sleeve presses onto the pressure ring.

[0014] Furthermore, the pressing assembly also includes a limiting rod that passes through the core post and whose two ends press against the pressure ring.

[0015] Furthermore, the pressure sleeve is provided with a first clearance groove and a second clearance groove, and the two ends of the limiting rod are respectively located in the first clearance groove and the second clearance groove.

[0016] Optionally, the core post has a converging hole that extends through both ends of the core post.

[0017] Furthermore, the sidewall of the core post is provided with multiple flow holes, which communicate with the converging hole.

[0018] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0019] This utility model discloses a hot-pressing fixture for a return spring assembly. Multiple positioning components are provided, through which springs are inserted. The springs are sleeved on the positioning components and pressed against the uppermost collar by a pressure sleeve. The springs retract from their natural extension state until they reach a set length. Then, the fixture, along with the springs, is sent to a tempering furnace for heating. This allows for the simultaneous compression and heating of multiple springs, thus solving the problem of the difficulty in simultaneously compressing and heating multiple springs. Attached Figure Description

[0020] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0021] Figure 1 This is a perspective view of a hot-pressing fixture for a return spring assembly according to a preferred embodiment of the present invention;

[0022] Figure 2 yes Figure 1 A stereoscopic view from another perspective;

[0023] Figure 3 It is a three-dimensional view showing the sleeve and core separated;

[0024] Figure 4This is a three-dimensional view of the pressed components;

[0025] Figure 5 This is a 3D view of the positioning component;

[0026] Figure 6 It is a stereoscopic view of the positioning component from another perspective.

[0027] The reference numerals in the attached figures are explained as follows:

[0028] 1. Pressing assembly; 2. Positioning assembly; 3. Spring; 11. Core post; 12. Pressure sleeve; 13. Ring disc; 14. Compression zone; 15. Cavity; 16. Pressure ring; 17. Converging hole; 18. Flow hole; 19. Limiting rod; 21. Collar; 22. Extrusion zone; 23. Positioning component; 25. First positioning ring; 26. Second positioning ring; 27. First clearance hole; 28. Second clearance hole; 121. First clearance groove; 122. Second clearance groove; 211. Coarse ring;

[0029] 212. Thin ring; 213. First reinforcing ring; 214. Second reinforcing ring; 231. Upper top post; 232. Lower top post. Detailed Implementation

[0030] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0031] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0033] like Figure 1 and Figure 2 and Figure 3As shown, a hot-pressing tooling for a return spring assembly includes a pressing assembly 1 and a positioning assembly 2. The pressing assembly 1 includes a core column 11 and a pressing sleeve 12. A ring disk 13 is provided at the bottom of the core column 11. The outer diameter of the ring disk 13 is larger than the outer diameter of the core column 11. The pressing sleeve 12 has a cavity 15. The core column 11 is sleeved in the cavity 15. A compression zone 14 is formed between the pressing sleeve 12 and the ring disk 13.

[0034] The positioning component 2 is sleeved on the core column 11 and is located in the compression zone 14. The positioning component 2 is used to fix and compress the spring 3, and the pressure sleeve 12 can slide on the core column 11.

[0035] The positioning component 2 includes at least two collars 21. The collars 21 are fitted onto the core column 11. The bottom collar 21 is laid flat on the ring disk 13. The pressure sleeve 12 is used to press on the top collar 21. The spring 3 is placed on the bottom collar 21. A compression zone 22 is formed between two adjacent collars 21. The compression zone 22 is used to place the spring 3. At least one collar 21 is provided with multiple positioning elements 23. The positioning elements 23 are located in the compression zone 22. The positioning elements 23 are used to insert the spring 3, that is, the spring 3 is fitted onto the positioning element 23. When the pressure sleeve 12 is pressed on the top collar 21, the spring 3 contracts on the positioning element 23. The positioning element 23 can prevent the spring 3 from bending when it contracts. The positioning element 23 can also play a guiding role. The amount of contraction of the spring 3 is set according to the process requirements. Different weights of pressure sleeves 12 cause the spring 3 to contract to different lengths.

[0036] The pressing assembly 1 also includes a pressing ring 16, which is used to press on the uppermost collar 21. In this example, the pressing ring 16 presses on the upper thin ring 212, and the pressing sleeve 12 presses on the pressing ring 16.

[0037] The pressing assembly 1 also includes a limiting rod 19, which passes through the core column 11. Both ends of the limiting rod 19 press on the pressure ring 16. After the springs 3 are stacked, the pressure sleeve 12 is pressed down and the limiting rod 19 is put on. The limiting rod 19 presses on the pressure ring 16, so that all the springs 3 are compressed and fixed.

[0038] The pressure sleeve 12 is provided with a first clearance groove 121 and a second clearance groove 122. The two ends of the limiting rod 19 are respectively located in the first clearance groove 121 and the second clearance groove 122. At this time, the pressure sleeve 12 presses on the pressure ring 16. The pressure sleeve 12 moves downward, and the two ends of the limiting rod 19 are still in the first clearance groove 121 and the second clearance groove 122. The pressure sleeve 12 compresses all the springs 3 to the set length range. The first clearance groove 121 and the second clearance groove 122 can accommodate springs 3 with different layers. In addition, the pressure sleeve 12 is pressed down a little more so that the limiting rod 19 can pass into the first clearance groove 121 and the second clearance groove 122.

[0039] like Figure 4 and Figure 5 and Figure 6As shown, the collar 21 includes a thick ring 211 and a thin ring 212. The thick ring 211 is disposed between two thin rings 212. One thick ring 211 and two thin rings 212 form a compression group. At this time, a spring 3 is placed on the upper surface of the lower thin ring 212, and a spring 3 is also placed on the upper surface of the thick ring 211. The upper thin ring 212 is used to press on the upper spring 3, and the thick ring 211 is used to press on the lower spring 3.

[0040] The positioning component 23 includes an upper top post 231 and a lower top post 232, which are respectively disposed on the two end faces of the thick ring 211. The upper top post 231 and the lower top post 232 are disposed opposite to each other. The thickness of the thick ring 211 is greater than that of the thin ring 212, so that the thick ring 211 can more effectively support the upper top post 231 and the lower top post 232.

[0041] Two thin rings 212 are respectively provided with a first positioning ring 25 and a second positioning ring 26. The first positioning ring 25 and the second positioning ring 26 are arranged opposite to each other. The first positioning ring 25 is located in the extension direction of the upper top post 231, and the second positioning ring 26 is located in the extension direction of the lower top post 232. The first positioning ring 25 and the second positioning ring 26 are used to sleeve the spring 3. The upper top post 231 and the lower top post 232 are respectively provided with a tip. When the upper thin ring 212 is pressed down, the upper top post 231 can easily enter the upper spring 3, and then the bottom end of the upper spring 3 is pressed against the thick ring 211. When the thick ring 211 is pressed down, the lower top post 232 can also easily enter the lower spring 3.

[0042] Two thin rings 212 are respectively provided with a first clearance hole 27 and a second clearance hole 28. The first clearance hole 27 communicates with the first positioning ring 25 and penetrates both ends of the upper thin ring 212. The second clearance hole 28 communicates with the second positioning ring 26 and penetrates both ends of the lower thin ring 212. The upper top post 231 can pass through the upper spring 3, enter the first positioning ring 25, and then enter the first clearance hole 27. The lower top post 232 can pass through the lower spring 3, enter the second positioning ring 26, and then enter the second clearance hole 28.

[0043] The core post 11 has a converging hole 17 that passes through both ends of the core post 11 and communicates with the ring disk 13. When the spring 3 on the outside of the core post 11 is heated, the heat is transferred to the inside of the core post 11. The converging hole 17 enables the heat to flow.

[0044] Multiple flow holes 18 are provided on the side wall of the core post 11. The flow holes 18 are connected to the converging holes 17. Since heat is transferred from the periphery to the center, there is a distance between the spring 3 and the side wall of the core post 11. Thus, the heat from the periphery passes through the flow holes 18 and enters the converging holes 17, realizing the flow of heat. In this way, the inner part of the spring 3 is also heated, and all surfaces of the spring 3 are heated.

[0045] The inner end of the upper thin ring 212 has a first reinforcing ring 213, and the inner end of the lower thin ring 212 has a second reinforcing ring 214. The first reinforcing ring 213 and the second reinforcing ring 214 are arranged opposite to each other. The first reinforcing ring 213 makes the upper thin ring 212 less prone to bending, and the second reinforcing ring 214 makes the lower thin ring 212 less prone to bending. The first reinforcing ring 213 extends toward the second reinforcing ring 214, and the second reinforcing ring 214 extends toward the first reinforcing ring 213.

[0046] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the protection scope of this utility model.

Claims

1. A hot-pressing fixture for a return spring assembly, comprising a pressing assembly (1) and a positioning assembly (2), characterized in that, The pressing assembly (1) includes a core column (11) and a pressing sleeve (12). The bottom of the core column (11) is provided with a ring disk (13). A compression zone (14) is formed between the pressing sleeve (12) and the ring disk (13). The pressing sleeve (12) has a cavity (15). The core column (11) is sleeved in the cavity (15). The positioning assembly (2) is sleeved on the core column (11) and is located in the compression zone (14). The positioning component (2) includes at least two collars (21), the bottom collar (21) is laid flat on the ring disk (13), and a compression zone (22) is formed between two adjacent collars (21). At least one collar (21) is provided with a plurality of positioning elements (23), the positioning elements (23) are located in the compression zone (22), the positioning elements (23) are used to insert springs, and the pressure sleeve (12) is used to press on the top collar (21).

2. The hot-pressing fixture for the return spring assembly according to claim 1, characterized in that, The collar (21) includes a thick ring (211) and a thin ring (212), with the thick ring (211) disposed between the two thin rings (212).

3. The hot-pressing fixture for the return spring assembly according to claim 2, characterized in that, The positioning component (23) includes an upper top post (231) and a lower top post (232), which are respectively disposed on the two end faces of the thick ring (211), with the upper top post (231) and the lower top post (232) being disposed opposite to each other.

4. The hot-pressing fixture for the return spring assembly according to claim 3, characterized in that, The two thin rings (212) are respectively provided with a first positioning ring (25) and a second positioning ring (26). The first positioning ring (25) is located in the extension direction of the upper top post (231), and the second positioning ring (26) is located in the extension direction of the lower top post (232). The first positioning ring (25) and the second positioning ring (26) are used to fit the spring.

5. The hot-pressing fixture for the return spring assembly according to claim 4, characterized in that, The two thin rings (212) are respectively provided with a first clearance hole (27) and a second clearance hole (28). The first clearance hole (27) communicates with the first positioning ring (25), and the second clearance hole (28) communicates with the second positioning ring (26).

6. The hot-pressing fixture for the return spring assembly according to claim 1, characterized in that, The pressing assembly (1) further includes a pressing ring (16), which is used to press on the uppermost collar (21), and the pressing sleeve (12) presses on the pressing ring (16).

7. The hot-pressing fixture for the return spring assembly according to claim 6, characterized in that, The pressing assembly (1) also includes a limiting rod (19) that passes through the core post (11) and whose two ends press against the pressure ring (16).

8. The hot-pressing fixture for the return spring assembly according to claim 7, characterized in that, The pressure sleeve (12) is provided with a first clearance groove (121) and a second clearance groove (122), and the two ends of the limiting rod (19) are respectively located in the first clearance groove (121) and the second clearance groove (122).

9. The hot-pressing fixture for the return spring assembly according to claim 1, characterized in that, The core post (11) has a converging hole (17) that extends through both ends of the core post (11).

10. The hot-pressing fixture for the return spring assembly according to claim 9, characterized in that, The core post (11) has a plurality of flow holes (18) on its side wall, and the flow holes (18) are connected to the converging holes (17).

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