A device for increasing the torque of a seat tube tooth plate

Abstract

The utility model provides a device that improves seat pipe toothed plate torque, this device that improves seat pipe toothed plate torque, including seat steel pipe, clamping frock, first fixed part, toothed plate and boss frock mechanism, boss frock mechanism contains mounting plate, mounting block, boss block, conical hole and positioning pin, wherein boss block is equipped with slot and protrusion, through the seat steel pipe is fixed in clamping frock, boss frock enters the steel pipe, utilizes the accurate positioning of positioning pin, and then with the press drive conical mandrel inserts boss frock conical hole and makes it open, forces steel pipe wall material to flow into toothed plate spline groove. The device that improves seat pipe toothed plate torque effectively improves toothed plate and steel pipe torque to above 500MPa, avoids skidding, guarantees seat backrest adjustment stability, improves production efficiency, reduces cost, enhances process stability and product quality consistency through standardization process and reusable frock simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of seat processing technology, specifically to a device for increasing the torque of a seat tube tooth plate. Background Technology

[0002] In the field of seat manufacturing, the seat back adjustment function relies on the reliable connection between the seat tube and the toothed plate. Torque, as a key parameter for measuring connection strength, directly affects the user experience and safety of the seat. Currently, the market requires a stringent torque of more than 500MPa for the steel tube toothed plate. However, the traditional stirrup process has obvious limitations. Its connection method makes it difficult for the steel tube and the toothed plate to form a tight mechanical engagement, resulting in insufficient contact area between the two and low torque transmission efficiency. A large number of products become unqualified due to insufficient torque. In actual use, the slippage between the toothed plate and the steel tube caused by insufficient torque occurs frequently, making it impossible to adjust the seat back stably. This not only reduces the practicality of the seat but also poses safety hazards. As the market's requirements for seat quality continue to increase, developing a new technology solution that can effectively improve the torque of the seat tube toothed plate and meet the needs of production and use has become an important problem that the industry urgently needs to solve. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this utility model provides a device and its method for increasing the torque of a seat tube tooth plate, thus solving the problems of insufficient torque and potential product quality issues.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a device for increasing the torque of a seat tube toothed plate, comprising: a seat steel tube, wherein a clamping fixture is provided on the outer surface of the seat steel tube, a first fixing member is provided on the outer side of the seat steel tube, a toothed plate is fixedly connected to the front end of the first fixing member, and a boss fixture mechanism is provided at the upper end of the seat steel tube.

[0007] The boss tooling mechanism includes:

[0008] Mounting plate, located at the upper end of the seat steel tube;

[0009] The mounting block has a mounting hole on the upper surface of the mounting plate near the right end, and the mounting block is located inside the mounting hole;

[0010] A boss block, which is connected to the bottom of the mounting block;

[0011] A tapered hole is formed through the interior of the boss block;

[0012] The positioning pin has a first pin hole on the upper surface of the mounting plate near the left end, and the bottom of the positioning pin is inserted into the first pin hole.

[0013] Preferably, a first limiting block is fixedly connected to the outer surface of the seat steel tube near the upper end, a second limiting block is provided at the upper end of the first limiting block, the inner wall of the second limiting block is fixedly connected to the seat steel tube, the first fixing member is located between the first limiting block and the second limiting block, and its upper and lower ends abut against the bottom of the second limiting block and the top of the first limiting block, respectively.

[0014] Preferably, the first fixing member has a through hole inside, and the inner wall of the through hole is provided with a spline groove, the side of the spline groove near the center of the through hole is in contact with the seat steel tube.

[0015] Preferably, the toothed plate has a groove on its upper surface near the outer front end, and a tooth groove on the outer surface of the front end of the toothed plate.

[0016] Preferably, the upper end of the mounting block is provided with a tapered mandrel, the bottom of which penetrates the mounting block and extends into the tapered hole, and slides in cooperation with the inner wall of the tapered hole.

[0017] Preferably, the boss block has a slot in the middle, which divides the boss block into two symmetrical left and right parts. The outer surfaces of the two boss blocks near the bottom are fixedly connected with protrusions, and the outer surfaces of the protrusions are in contact with the inner wall of the seat steel tube.

[0018] Preferably, the front end of the toothed plate is provided with a second fixing member, and the top of the second fixing member near the front end is provided with a second pin hole, and the bottom of the positioning pin passes through the second pin hole.

[0019] A method for increasing the torque of a seat toothed plate, based on any one of the devices for increasing the torque of a seat toothed plate, includes the following steps:

[0020] S1. Check the tooling, equipment and materials to ensure that components such as the boss tooling mechanism and the seat steel tube tooth plate meet the design requirements;

[0021] S2. Fix the clamping fixture to the worktable to ensure stable clamping of the seat steel tube without affecting subsequent installation;

[0022] S3. Place the steel pipe in the tooling and fix it to prevent it from shifting during processing;

[0023] S4. Place the boss tooling mechanism into the seat steel tube, insert the positioning pin, and ensure that the boss tooling mechanism is located in the center of the seat steel tube.

[0024] S5. Start the press and set the parameters. Press in the tapered mandrel to make the boss block in the boss tooling mechanism expand and drive the outer side of the seat steel tube to be embedded in the spline groove, thus completing the torque increase of the seat steel tube tooth plate.

[0025] S6. Disassemble the boss tooling mechanism for inspection and maintenance, test the product torque and quality, and handle defective products.

[0026] (III) Beneficial Effects

[0027] This utility model provides a device and its method for increasing the torque of a seat toothed plate. It has the following beneficial effects:

[0028] This solution for improving the torque of the seat tube toothed plate significantly increases the contact area between the two by allowing the steel tube wall material to flow into the spline groove of the toothed plate. This effectively increases the torque between the toothed plate and the steel tube to over 500MPa, preventing slippage and ensuring the stable and reliable adjustment function of the seat backrest, thus significantly improving the safety and comfort of the seat.

[0029] To enhance product market competitiveness, standardized operating procedures and tooling design ensure a clear and standardized production process. Precise positioning of mechanical clamping fixtures and locating pins reduces installation and debugging time. Reusable boss tooling and supporting equipment avoid frequent tooling changes, accelerate production pace, shorten the processing cycle of individual products, and meet the needs of large-scale production. Boss tooling only undergoes quenching and tempering treatment on the working part, while the rest maintains good ductility, extending tooling service life, reducing tooling replacement frequency, and lowering tooling procurement costs. At the same time, precise process control reduces defective products caused by insufficient torque, reduces material waste and rework costs, and achieves cost reduction and efficiency improvement in the production process. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0031] Figure 2 This is a schematic diagram of the internal structure of this utility model;

[0032] Figure 3 This is a schematic diagram of the boss tooling mechanism of this utility model;

[0033] Figure 4 This is a schematic diagram of the positioning pin insertion position of this utility model;

[0034] Figure 5 This is a schematic diagram showing the position of the spline groove in this utility model;

[0035] Figure 6 This is a top view of the present invention.

[0036] Among them, 1. Seat steel tube; 2. Clamping fixture; 3. First limiting block; 4. Second limiting block; 5. First fixing component; 6. Spline groove; 7. Toothed plate; 8. Positioning pin; 9. Mounting plate; 10. Boss tooling mechanism; 11. Mounting block; 12. Boss block; 13. Tapered hole; 14. Protrusion; 15. Tapered mandrel; 16. First pin hole; 17. Second pin hole; 18. Second fixing component; 19. Groove; 20. Toothed groove; 21. Mounting hole; 22. Slot; 23. Through hole. Detailed Implementation

[0037] 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.

[0038] like Figure 1-6 As shown, this utility model embodiment provides a device for increasing the torque of a seat tube toothed plate, including a seat steel tube 1, a clamping fixture 2 provided on the outer surface of the seat steel tube 1, a first fixing member 5 provided on the outer side of the seat steel tube 1, a toothed plate 7 fixedly connected to the front end of the first fixing member 5, and a boss fixture mechanism 10 provided on the upper end of the seat steel tube 1.

[0039] The outer diameter of the boss tooling mechanism 10 is smaller than the inner diameter of the seat steel tube 1. The outer diameter of the boss block 12 including the protrusion 14 is φ22.2, the height of the protrusion 14 is 2mm, the width of the slot 22 of the boss tooling mechanism 10 is 5mm, and the boss tooling mechanism 10 has a tapered hole 13 inside. Only the working position of the boss tooling mechanism 10 is quenched and tempered, and the other parts are tempered to ensure high ductility.

[0040] A first limiting block 3 is fixedly connected to the outer surface of the seat steel tube 1 near the upper end. A second limiting block 4 is provided at the upper end of the first limiting block 3. The inner wall of the second limiting block 4 is fixedly connected to the seat steel tube 1. A first fixing member 5 is located between the first limiting block 3 and the second limiting block 4, and its upper and lower ends abut against the bottom of the second limiting block 4 and the top of the first limiting block 3, respectively. A through hole 23 is provided inside the first fixing member 5. A spline groove 6 is provided on the inner wall of the through hole 23. The side of the spline groove 6 near the center of the through hole 23 contacts the seat steel tube 1. A groove 19 is provided on the upper surface of the toothed plate 7 near the outer front end. A toothed groove 20 is provided on the outer surface of the front end of the toothed plate 7.

[0041] The boss tooling mechanism 10 includes:

[0042] Mounting plate 9 is located at the upper end of seat steel tube 1.

[0043] Mounting block 11, mounting plate 9 has a mounting hole 21 on its upper surface near the right end, and mounting block 11 is located inside mounting hole 21.

[0044] Boss 12 is connected to the bottom of mounting block 11.

[0045] A tapered hole 13 is formed through the interior of the boss block 12.

[0046] The positioning pin 8 and the mounting plate 9 have a first pin hole 16 on the upper surface near the left end. The bottom of the positioning pin 8 is inserted into the first pin hole 16.

[0047] The upper end of the mounting block 11 is provided with a tapered mandrel 15. The bottom of the tapered mandrel 15 passes through the mounting block 11 and extends into the tapered hole 13, and slides with the inner wall of the tapered hole 13. The middle part of the boss block 12 is provided with a slot 22, which divides the boss block 12 into two symmetrical left and right parts. The outer surfaces of the two boss blocks 12 near the bottom are fixedly connected with protrusions 14, and the outer surfaces of the protrusions 14 are in contact with the inner wall of the seat steel tube 1.

[0048] The front end of the toothed plate 7 is provided with a second fixing member 18, and the top of the second fixing member 18 near the front end is provided with a second pin hole 17, and the bottom of the positioning pin 8 passes through the second pin hole 17.

[0049] A method for increasing the torque of a seat toothed plate, based on any one of the devices for increasing the torque of a seat toothed plate, includes the following steps:

[0050] S1. Check the tooling, equipment and materials to ensure that components such as the boss tooling mechanism 10 and the seat steel pipe 1 toothed plate 7 meet the design requirements.

[0051] S2. Fix the clamping fixture 2 to the worktable to ensure that it can stably clamp the seat steel pipe 1 without affecting subsequent installation.

[0052] S3. Place the steel pipe inside the tooling and fix it in place to prevent it from shifting during processing.

[0053] S4. Place the boss tooling mechanism 10 into the seat steel tube 1, insert the positioning pin 8, and ensure that the boss tooling mechanism 10 is located in the center of the seat steel tube 1.

[0054] S5. Start the press and set the parameters. Press the tapered mandrel 15 to make the boss block 12 in the boss tooling mechanism 10 expand and drive the outer side of the seat steel tube 1 to be embedded in the spline groove 6, thus completing the torque increase of the toothed plate 7 of the seat steel tube 1.

[0055] S6. Disassemble the boss tooling mechanism 10 for inspection and maintenance, test product torque and quality, and handle defective products.

[0056] Working principle: Based on the plasticity of the material and the interaction between the tooling and the parts, when the press is started, the press head drives the conical mandrel 15 to move down. The bottom of the conical mandrel 15 passes through the mounting block 11 and is inserted into the conical hole 13 of the boss block 12. Due to the characteristics of the conical structure, as the mandrel goes deeper, the boss block 12 is subjected to outward extrusion force. Also, because the boss block 12 has a slot 22 in the middle, it can be divided into two symmetrical left and right parts under pressure and expand outward. At this time, the protrusion 14 on the outer surface of the boss block 12 contacts the inner wall of the seat steel tube 1.

[0057] The outer diameter of the boss tooling mechanism 10 is smaller than the inner diameter of the seat steel tube 1. The outer diameter of the boss block 12 including the protrusion 14 is φ22.2, the height of the protrusion 14 is 2mm, the width of the slot 22 of the boss tooling mechanism 10 is 5mm, and the boss tooling mechanism 10 has a tapered hole 13 inside. Only the working position of the boss tooling mechanism 10 is quenched and tempered, and the other parts are tempered to ensure high ductility.

[0058] The seat steel tube 1 material has a certain degree of plasticity. Under the continuous pressure of the protrusion 14, the steel tube wall material begins to flow. Since the toothed plate 7 is adjacent to the seat steel tube 1 through the first fixing member 5, and the inner wall of the through hole 23 of the first fixing member 5 is provided with a spline groove 6 close to the seat steel tube 1, the flowing steel tube wall material will fill towards the spline groove 6. As more material flows into the spline groove 6, the contact area between the inner wall of the seat steel tube 1 and the toothed plate 7 increases significantly. According to the principle that friction is proportional to the contact area, the friction between the two increases, thereby realizing the torque increase between the toothed plate 7 and the seat steel tube 1, and meeting the torque strength requirements of the seat steel tube 1 in actual use.

[0059] 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, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for increasing the torque of a seat tube toothed plate, characterized in that, include: Seat steel tube (1), the outer surface of the seat steel tube (1) is provided with a clamping fixture (2), the outer side of the seat steel tube (1) is provided with a first fixing member (5), the front end of the first fixing member (5) is fixedly connected with a toothed plate (7), and the upper end of the seat steel tube (1) is provided with a boss fixture mechanism (10). The boss tooling mechanism (10) includes: Mounting plate (9), which is located at the upper end of the seat steel tube (1); Mounting block (11), mounting plate (9) has a mounting hole (21) on its upper surface near the right end, and the mounting block (11) is located inside the mounting hole (21); A boss (12) is attached to the bottom of a mounting block (11); A tapered hole (13) is formed through the interior of the boss block (12); The positioning pin (8) and the mounting plate (9) have a first pin hole (16) on the upper surface near the left end. The bottom of the positioning pin (8) is inserted into the first pin hole (16).

2. The device for increasing the torque of a seat tube gear plate according to claim 1, characterized in that: The outer surface of the seat steel tube (1) near the upper end is fixedly connected to a first limiting block (3), and a second limiting block (4) is provided at the upper end of the first limiting block (3). The inner wall of the second limiting block (4) is fixedly connected to the seat steel tube (1). The first fixing member (5) is located between the first limiting block (3) and the second limiting block (4), and its upper and lower ends abut against the bottom of the second limiting block (4) and the top of the first limiting block (3), respectively.

3. The device for increasing the torque of a seat tube tooth plate according to claim 1, characterized in that: The first fixing member (5) has a through hole (23) inside, and the inner wall of the through hole (23) is provided with a spline groove (6). The side of the spline groove (6) near the center of the through hole (23) is in contact with the seat steel tube (1).

4. The device for increasing the torque of a seat tube tooth plate according to claim 1, characterized in that: The toothed plate (7) has a groove (19) on its upper surface near the outer front end, and a toothed groove (20) on the outer surface of the front end of the toothed plate (7).

5. The device for increasing the torque of a seat tube tooth plate according to claim 1, characterized in that: The upper end of the mounting block (11) is provided with a tapered mandrel (15), the bottom of which penetrates the mounting block (11) and extends into the tapered hole (13), and slides in cooperation with the inner wall of the tapered hole (13).

6. The device for increasing the torque of a seat tube tooth plate according to claim 1, characterized in that: A slot (22) is provided in the middle of the boss block (12), the slot (22) divides the boss block (12) into two symmetrical left and right parts, and a protrusion (14) is fixedly connected to the outer surface of the two boss blocks (12) near the bottom, and the outer surface of the protrusion (14) is in contact with the inner wall of the seat steel tube (1).

7. The device for increasing the torque of a seat tube tooth plate according to claim 1, characterized in that: The front end of the toothed plate (7) is provided with a second fixing member (18), and the second fixing member (18) has a second pin hole (17) at the top near the front end, and the bottom of the positioning pin (8) passes through the second pin hole (17).

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