Die for manufacturing seat rear linkage tube extrusion assembly

Abstract

The utility model relates to the technical field of seat rear linkage pipes, in particular to a seat rear linkage pipe extrusion assembly manufacturing die which comprises a forming die, a first operation table, a second operation table and a control end. A group of upper dies and a group of lower dies are respectively arranged on the first operation table and the second operation table; a pair of first punches and a pair of second punches are arranged on the first operation table, and a pair of third punches are arranged on the second operation table; a first limiting assembly is arranged on the first operation table and used for positioning a pipe body of the seat rear linkage pipe placed on the lower die. A second limiting assembly is arranged on the first operation table and used for limiting a sector gear connecting rod support and a connecting rod support which are installed on the pipe body. In the tube extrusion assembly manufacturing process, a tube extrusion assembly manufacturing mold is used for manufacturing; the installation mode of welding a sector gear connecting rod support and a connecting rod support is replaced, the three stopping parts are formed on the pipe body of the seat rear linkage pipe in a pipe extruding mode, production steps are simplified, resources are saved, and production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of seat rear linkage pipes, and particularly relates to a manufacturing die for a seat rear linkage pipe extrusion assembly. Background Art

[0002] An automobile seat with a height adjustment function is rotatably installed between a seat rail and a cushion frame through a front link bracket and a rear link bracket to form a four-link structure, and the height of the seat is adjusted by driving a link bracket on one side of the seat rear linkage pipe provided with a sector gear. With the continuous development of the economy, the demand for automobiles is increasing, and new requirements are also put forward for the production efficiency of seat rear linkage pipes. The current production method of seat rear linkage pipes is to install two link brackets on the linkage pipe by welding. This production method has cumbersome steps, low production efficiency, and requires more welding resources, and has gradually been unable to meet the growing production demand of seat rear linkage pipes. Therefore, it is very necessary to invent a manufacturing die for a seat rear linkage pipe extrusion assembly to simplify the production steps, save resources, and improve production efficiency. Summary of the Utility Model

[0003] In view of the above problems, the utility model provides a manufacturing die for a seat rear linkage pipe extrusion assembly, and the technical solution used is as follows:

[0004] A manufacturing die for a seat rear linkage pipe extrusion assembly includes a forming die, a first operating table, a second operating table, and a control end; the forming die includes an upper die, a lower die, a first punch, a second punch, and a third punch; a set of upper die and lower die are provided on each of the first operating table and the second operating table; a pair of first punches and a pair of second punches are provided on the first operating table, and a pair of third punches are provided on the second operating table;

[0005] The lower die is fixedly installed on the first operating table or the second operating table; the upper die moves up and down to cooperate with the lower die; the first punches, the second punches, and the third punches of the same pair move towards each other; the first punch and the second punch alternately align with the pipe body of the seat rear linkage pipe on the lower die of the first operating table; the third punch aligns with the pipe body of the seat rear linkage pipe on the lower die of the second operating table;

[0006] A first placement groove is provided on the first operating table corresponding to the sector gear link bracket and the link bracket of the seat rear linkage pipe; a second placement groove is provided on the second operating table corresponding to the sector gear link bracket and the link bracket of the seat rear linkage pipe; a first limiting component is provided on the first operating table for positioning the pipe body of the seat rear linkage pipe placed on the lower die; a second limiting component is provided on the first operating table for limiting the sector gear link bracket and the link bracket installed on the pipe body;

[0007] The control end is used to control the operation of the entire extrusion die assembly for manufacturing.

[0008] Further, the upper die, the first punch, the second punch, and the third punch are all driven to move by a driving cylinder.

[0009] Further, the first limiting component includes a first limiting cylinder and a limiting plate; the first limiting cylinder is fixedly installed on the first operating table; the limiting plate is slidably installed on the telescopic end of the first limiting cylinder; the limiting plate intermittently moves to both sides of the lower die on the first operating table to position the body of the seat rear linkage tube placed on the lower die.

[0010] Further, the limiting plate is driven to slide by a threaded rod, and fixing screws are provided on the limiting plate.

[0011] Further, the second limiting component includes a second limiting cylinder, a clamping rod, a tooth-limiting block, and a limiting rod; there are two second limiting cylinders, which are fixedly installed on the first operating table; the two second limiting cylinders respectively correspond to the sector gear linkage bracket and the linkage bracket of the seat rear linkage tube; clamping rods are fixedly installed on the telescopic ends of the two second limiting cylinders for clamping the clamping holes on the sector gear linkage bracket or the linkage bracket; a tooth-limiting block is fixedly installed on the telescopic end of the second limiting cylinder corresponding to the sector gear linkage bracket for limiting the sector gear of the sector gear linkage bracket; a limiting rod is fixedly installed on the telescopic end of the second limiting cylinder corresponding to the linkage bracket for limiting the linkage bracket.

[0012] Further, two sets of lifting components are provided at both ends of the body of the seat rear linkage tube corresponding to the first operating table; each set of lifting components includes a first lifting cylinder, a driving plate, and a pushing plate; the first lifting cylinder is fixedly installed on the first operating table, and its telescopic end is fixedly connected to the driving plate; the driving plate is slidably installed on the first operating table, and a sloped limiting chute is provided thereon; the pushing plate is slidably installed on the first operating table and is slidably connected to the limiting chute for pushing out the seat rear linkage tube on the lower die of the first operating table.

[0013] Further, two second lifting cylinders are provided at both ends of the body of the seat rear linkage tube corresponding to the second operating table; the second lifting cylinders are fixedly installed on the second operating table, and their telescopic ends are used to push out the seat rear linkage tube on the lower die of the second operating table.

[0014] Since the present utility model adopts the above technical solutions, the present utility model has the following advantages:

[0015] Through the cooperative design of a forming die, a first limiting component, a second limiting component, a lifting component and a second lifting cylinder, the utility model replaces the welding and installation method of a sector gear connecting rod bracket and a connecting rod bracket. By means of pipe extrusion, three stop portions are formed on the pipe body of the rear linkage pipe of the seat. The first stop portion and the second stop portion can fix the sector gear connecting rod bracket and the connecting rod bracket, simplify the production steps, save resources and improve the production efficiency.

[0016] The first limiting component of the utility model enables the operator to accurately place the pipe body into the lower die, and the second limiting component enables the operator to accurately sleeved the sector gear connecting rod bracket and the connecting rod bracket into the pipe body, ensuring the stable quality of the rear linkage pipe of the seat; moreover, the lifting component and the second lifting cylinder can push out the pipe body in the lower die, and the operator does not need to exert effort to take out the pipe body from the lower die, saving manpower and improving the work efficiency. Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] Figure 2 It is a schematic diagram of the operation of the first limiting component of the utility model.

[0019] Figures 3 - 4 It is a schematic diagram of the structure of the first limiting component of the utility model.

[0020] Figure 5 It is a schematic diagram of the assembly structure of the second limiting component and the lifting component of the utility model.

[0021] Figures 6 - 7 It is a schematic diagram of the structure of the second limiting component of the utility model.

[0022] Figures 8 - 9 It is a schematic diagram of the structure of the lifting component of the utility model.

[0023] Figures 10 - 13 It is a schematic diagram of the operation of the first operating table before the first pipe extrusion of the utility model.

[0024] Figures 14 - 16 It is a schematic diagram of the operation of the first operating table before the second pipe extrusion of the utility model.

[0025] Figures 17 - 18 It is a schematic diagram of the operation of the first operating table after the second pipe extrusion of the utility model.

[0026] Figures 19 - 21 It is a schematic diagram of the operation of the first operating table before the third pipe extrusion of the utility model.

[0027] Figures 22 - 23 It is a schematic diagram of the operation of the first operating table after the third pipe extrusion of the utility model.

[0028] Figure 24 This is a schematic structural view of the body of the rear linkage tube of the utility model seat.

[0029] Figure 25 This is a schematic structural view of the rear linkage tube of the utility model seat after the first pipe extrusion.

[0030] Figure 26 This is a schematic structural view of the rear linkage tube of the utility model seat after the second pipe extrusion.

[0031] Figures 27 - 28 This is a schematic structural view of the rear linkage tube of the utility model seat after the third pipe extrusion.

[0032] Figure 29 This is a schematic connection view of the remote control end and the electrical components of the utility model.

[0033] Reference numerals in the drawings:

[0034] 1 - Rear linkage tube of the seat; 101 - Tube body; 102 - Sector gear link bracket; 103 - Link bracket; 104 - First stop portion; 105 - Second stop portion; 106 - Third stop portion;

[0035] 2 - Molding die; 201 - Upper die; 202 - Lower die; 203 - First punch; 204 - Second punch; 205 - Third punch;

[0036] 3 - First limiting component; 301 - First limiting cylinder; 302 - Limiting plate;

[0037] 4 - Second limiting component; 401 - Second limiting cylinder; 402 - Clamping rod; 403 - Tooth clamping limit block; 404 - Limiting rod;

[0038] 5 - Lifting component; 501 - First lifting cylinder; 502 - Driving plate (5021 - Limiting sliding groove); 503 - Pushing plate;

[0039] 6 - Second lifting cylinder;

[0040] 7 - First operating table; 701 - First placement groove;

[0041] 8 - Second operating table; 801 - Second placement groove;

[0042] 9 - Control end. Detailed implementation manners

[0043] The technical solution of the present utility model will be further specifically described below through embodiments in conjunction with the accompanying drawings. In the following description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0044] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inward", "outward", "front", "rear", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the invention product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. Embodiment

[0045] This embodiment is used to extrude the pipe on the pipe body 101 of the rear linkage pipe 1 of the seat to generate the first stop portion 104, the second stop portion 105, and the third stop portion 106, and install the sector gear linkage bracket 102 and the linkage bracket 103 on the pipe body 101 of the rear linkage pipe 1 of the seat.

[0046] As Figures 1 - 2 、 Figure 5 and Figure 23 shown, a manufacturing mold for an extrusion assembly of a rear linkage pipe of a seat includes a forming mold 2, a first operating table 7, and a second operating table 8; the forming mold 2 includes an upper mold 201, a lower mold 202, a first punch 203, a second punch 204, and a third punch 205;

[0047] A set of upper mold 201 and lower mold 202 are provided on each of the first operating table 7 and the second operating table 8; the lower mold 202 is fixedly installed on the first operating table 7 or the second operating table 8; the upper mold 201 is driven by a hydraulic cylinder to move up and down (not shown in the figure) and cooperate with the lower mold 202;

[0048] On both the left and right sides of the lower mold 202 on the first operating table 7, a first punch 203 and a second punch 204 are provided. The first punch 203 and the second punch 204 on the same side are fixedly installed on the same mounting plate; the two mounting plates are driven by a hydraulic cylinder to move (not shown in the figure). The two mounting plates can move towards each other and can move along the front-rear direction, so that the first punch 203 and the second punch 204 are alternately aligned with the pipe body 101 of the rear linkage pipe 1 of the seat on the lower mold 202 of the first operating table 7;

[0049] On both the left and right sides of the lower die 202 on the second operation table 8, there is a third punch 205; the two third punches 205 are driven by a hydraulic cylinder to move towards each other (not shown in the figure); the third punch 205 is aligned with the pipe body 101 of the seat rear linkage pipe 1 on the lower die 202 of the second operation table 8;

[0050] On the first operation table 7, there are first placement grooves 701 corresponding to the sector gear link brackets 102 and link brackets 103 of the seat rear linkage pipe 1; on the second operation table 8, there are second placement grooves 801 corresponding to the sector gear link brackets 102 and link brackets 103 of the seat rear linkage pipe 1;

[0051] On the first operation table 7, there is a first limit component 3 and a second limit component 4, and there are two groups of lifting components 5 corresponding to both ends of the pipe body 101 of the seat rear linkage pipe 1; on the second operation table 8, there is a second lifting cylinder 6.

[0052] As Figures 3 - 4 shown, the first limit component 3 includes a first limit cylinder 301 and a limit plate 302; there are two first limit cylinders 301, both horizontally and fixedly installed on the first operation table 7, and the telescopic ends move in the front-back direction; the limit plate 302 is horizontally slidably installed on the telescopic end of the first limit cylinder 301 and is driven to slide by a threaded rod, and the sliding direction is the left-right direction; there are fixing screws on the limit plate 302;

[0053] Specifically, the distance between the two limit plates 302 is adjusted through the threaded rod. After adjustment, the fixing screws fix the limit plate 302 on the telescopic end of the first limit cylinder 301; the first limit cylinder 301 drives the limit plate 302 to move, and the two limit plates 302 can move to the left and right sides of the lower die 202 of the first operation table 7 to position the pipe body 101 of the seat rear linkage pipe 1 placed on the lower die 202.

[0054] As Figures 6 - 7 shown, the second limit component 4 includes a second limit cylinder 401, a clamping rod 402, a tooth clamping limit block 403, and a limit rod 404; there are two second limit cylinders 401, which are symmetrically and fixedly installed on the first operation table 7 in the left-right direction; on the telescopic ends of the two second limit cylinders 401, a first connecting plate and a second connecting plate are respectively fixedly installed, and the first connecting plate and the second connecting plate respectively correspond to the sector gear link bracket 102 and the link bracket 103 of the seat rear linkage pipe 1;

[0055] Both the first connecting plate and the second connecting plate are fixedly installed with clamping rods 402 that are slidably installed on the first operating table 7 and are used to clamp the clamping holes on the sector gear connecting rod bracket 102 or the connecting rod bracket 103; the first connecting plate is also fixedly installed with a tooth clamping limit block 403 that is slidably installed on the first operating table 7 and is used to limit the sector gear of the sector gear connecting rod bracket 102; the second connecting plate is also fixedly installed with a limit rod 404 that is slidably installed on the first operating table 7 and is used to limit the connecting rod bracket 103.

[0056] Specifically, the two limit cylinders two 401 drive the first connecting plate and the second connecting plate to move towards each other; when the first connecting plate slides outwards, the clamping rod 402 and the tooth clamping limit block 403 on it extend outwards. After the sector gear connecting rod bracket 102 is sleeved on the pipe body 101, the sector gear connecting rod bracket 102 enters the first placement groove 701, the clamping rod 402 clamps the clamping hole on the sector gear connecting rod bracket 102, and the tooth clamping limit block 403 clamps the sector gear of the sector gear connecting rod bracket 102 to limit the sector gear connecting rod bracket 102; when the second connecting plate slides outwards, the clamping rod 402 and the limit rod 404 on it extend outwards. After the connecting rod bracket 103 is sleeved on the pipe body 101, the connecting rod bracket 103 enters the second placement groove 801, the clamping rod 402 clamps the clamping hole on the connecting rod bracket 103, and the limit rod 404 abuts against the upper edge of the connecting rod bracket 103 to limit the connecting rod bracket 103.

[0057] As Figures 8 - 9 shown, each set of lifting components 5 includes a first lifting cylinder 501, a driving plate 502 and a pushing plate 503; the first lifting cylinder 501 is fixedly installed on the first operating table 7 along the front-rear direction, and its telescopic end is fixedly connected to the driving plate 502; the driving plate 502 is vertically arranged and slidably installed on the first operating table 7 along the front-rear direction, and is provided with a limit chute 5021 that slopes downwards from front to back; the pushing plate 503 is vertically slidably installed on the first operating table 7 and is slidably connected to the limit chute 5021 through a pin shaft.

[0058] Specifically, the first lifting cylinder 501 drives the driving plate 502 to slide. When the driving plate 502 slides, the pin shaft of the pushing plate 503 slides along the limit chute 5021, driving the pushing plate 503 to move vertically up and down; when the pushing plate 503 moves upwards, it can push the seat rear linkage pipe 1 on the lower die 202 of the first operating table 7 upwards, so that the seat rear linkage pipe 1 is separated from the lower die 202.

[0059] As Figure 20 shown, two second lifting cylinders 6 are provided on the second operating table 8 corresponding to both ends of the pipe body 101 of the seat rear linkage pipe 1; the second lifting cylinders 6 are vertically fixedly installed on the second operating table 8, and their telescopic ends can push the seat rear linkage pipe 1 on the lower die 202 of the second operating table 8 upwards, so that the seat rear linkage pipe 1 is separated from the lower die 202.

[0060] The first limit cylinder 301, the second limit cylinder 401, the first lifting cylinder 501, and the second lifting cylinder 6 are all cylinders.

[0061] A manufacturing die for a seat rear linkage pipe extrusion assembly further includes a control terminal 9, as Figure 29 shown. The control terminal 9 includes a main controller, an interaction switch, an information transmission module, a storage module, and a power supply module. The main controller is electrically connected to the interaction switch, the information transmission module, the storage module, the power supply module, the hydraulic cylinder, the first limit cylinder 301, the second limit cylinder 401, the first lifting cylinder 501, and the second lifting cylinder 6. The main controller is used to control the operation of the entire extrusion assembly manufacturing die. The interaction switch is used to control the opening and closing of the hydraulic cylinder, the first limit cylinder 301, the second limit cylinder 401, the first lifting cylinder 501, and the second lifting cylinder 6. The information transmission module is used for information transmission between the main controller and the hydraulic cylinder, the first limit cylinder 301, the second limit cylinder 401, the first lifting cylinder 501, and the second lifting cylinder 6. The power supply module is used to provide stable power for the control terminal 9. The storage module is used to store the operation information data of the entire extrusion assembly manufacturing die.

[0062] A manufacturing process for a seat rear linkage pipe extrusion assembly uses the above-mentioned extrusion assembly manufacturing die for manufacturing. The specific process is as follows:

[0063] In the first step, the operator rotates the threaded rod and adjusts the position of the limit plate 302 according to the length of the pipe body 101 of the seat rear linkage pipe 1. After adjustment, the limit plate 302 is fixed on the telescopic end of the first limit cylinder 301 through a fixing screw. The first limit cylinder 301 drives the two limit plates 302 to move to the left and right sides of the lower die 202 of the first operation table 7.

[0064] In the second step, under the positioning action of the limit plate 302, the operator places the processed pipe body 101 on the lower die 202 of the first operation table 7 (as Figures 10 - 12 shown). The hydraulic cylinder drives the upper die 201 to descend onto the lower die 202 (as Figure 13 shown). The hydraulic cylinder drives the two first punches 203 to move and align with the left and right sides of the pipe body 101. The two first punches 203 both move towards the pipe body 101 to perform pipe extrusion on the pipe body 101, and two first stop portions 104 are formed on the pipe body 101 (as Figure 25 shown).

[0065] In the third step, the limit cylinder two 401 drives the connecting plate one and the connecting plate two to move outwards, and the clamping rod 402, the tooth clamping limit block 403, and the limit rod 404 all extend; the operator sleeved the sector gear connecting rod bracket 102 and the connecting rod bracket 103 onto the pipe body 101 respectively, and placed them in the corresponding first placement grooves 701 under the limiting action of the clamping rod 402, the tooth clamping limit block 403, and the limit rod 404. The sector gear connecting rod bracket 102 and the connecting rod bracket 103 are respectively in contact with the first stop portions 104 on both sides (as Figures 14 - 16 shown); the hydraulic cylinder drives the two second punches 204 to move and align with the left and right sides of the pipe body 101, and the two second punches 204 both move towards the pipe body 101 to extrude the pipe body 101 (as Figures 17 - 18 shown), and two second stop portions 105 are generated on the pipe body 101 (as Figure 26 shown);

[0066] In the fourth step, the hydraulic cylinder drives the upper die 201 on the first operation table 7 to move upwards, and the upper die 201 is separated from the lower die 202; the first lifting cylinder 501 drives the driving plate 502 to move, and the pushing plate 503 moves upwards and pushes the pipe body 101 out of the lower die 202; the operator takes out the pipe body 101;

[0067] In the fifth step, the operator places the pipe body 101 on the lower die 202 of the second operation table 8, and the sector gear connecting rod bracket 102 and the connecting rod bracket 103 are respectively placed in the corresponding second placement grooves 801. The hydraulic cylinder drives the upper die 201 on the second operation table 8 to descend onto the lower die 202 (as Figures 19 - 21 shown); the hydraulic cylinder drives the two third punches 205 to both move towards the pipe body 101 to extrude the pipe body 101 (as Figures 22 - 23 shown), and two third stop portions 106 are generated on the pipe body 101 (as Figure 27 shown);

[0068] In the sixth step, the hydraulic cylinder drives the upper die 201 on the second operation table 8 to move upwards, and the upper die 201 is separated from the lower die 202; the telescopic end of the second lifting cylinder 6 moves upwards and pushes the pipe body 101 out of the lower die 202, and the operator takes out the processed seat rear linkage pipe 1 as Figure 28 shown;

[0069] The above steps complete the manufacture of the extrusion assembly of the seat rear linkage pipe.

Claims

1. A seat rear linkage tube extrusion assembly manufacturing die, characterized in that: The invention comprises a forming die (2), a first operating table (7), a second operating table (8) and a control terminal (9); the forming die (2) comprises an upper die (201), a lower die (202), a first punch (203), a second punch (204) and a third punch (205); the first operating table (7) and the second operating table (8) are each provided with a set of upper dies (201) and lower dies (202); the first operating table (7) is provided with a pair of first punches (203) and a pair of second punches (204), and the second operating table (8) is provided with a pair of third punches (205); The lower die (202) is fixedly mounted on the first operating table (7) or the second operating table (8); the upper die (201) moves up and down to cooperate with the lower die (202); the first punch (203), the second punch (204) and the third punch (205) in the same pair move towards each other; the first punch (203) and the second punch (204) are alternately aligned with the tube body (101) of the seat rear linkage tube (1) on the lower die (202) of the first operating table (7); the third punch (205) is aligned with the tube body (101) of the seat rear linkage tube (1) on the lower die (202) of the second operating table (8); The first operating table (7) is provided with a first placement groove (701) on the sector gear connecting rod bracket (102) and the connecting rod bracket (103) corresponding to the seat rear linkage tube (1); the second operating table (8) is provided with a second placement groove (801) on the sector gear connecting rod bracket (102) and the connecting rod bracket (103) corresponding to the seat rear linkage tube (1); the first operating table (7) is provided with a limiting component 1 (3) for positioning the tube body (101) of the seat rear linkage tube (1) placed on the lower mold (202); the first operating table (7) is provided with a limiting component 2 (4) for limiting the sector gear connecting rod bracket (102) and the connecting rod bracket (103) installed on the tube body (101); The control end (9) is used to control the operation of the entire tube extrusion assembly manufacturing die.

2. According to the manufacturing mold of the seat rear linkage tube extrusion assembly according to claim 1, it is characterized in that: The upper die (201), the first punch (203), the second punch (204) and the third punch (205) are all driven to move by a driving cylinder.

3. According to the manufacturing mold of the seat rear linkage tube extrusion assembly as described in claim 1, it is characterized in that: The limiting assembly 1 (3) comprises a limiting cylinder 1 (301) and a limiting plate (302); the limiting cylinder 1 (301) is fixedly mounted on the first operating table (7); the limiting plate (302) is slidably mounted on the telescopic end of the limiting cylinder 1 (301); the limiting plate (302) intermittently moves to both sides of the lower mold (202) of the first operating table (7) to position the tube body (101) of the seat rear linkage tube (1) placed on the lower mold (202).

4. According to claim 3, a seat rear linkage tube extrusion assembly manufacturing mold is characterized in that: The limiting plate (302) is driven to slide by the threaded rod, and a fixing screw is provided on the limiting plate (302).

5. According to claim 3, a seat rear linkage tube extrusion assembly manufacturing mold is characterized in that: The second limiting assembly (4) comprises a second limiting cylinder (401), a clamping rod (402), a clamping tooth limiting block (403) and a limiting rod (404); two second limiting cylinders (401) are provided and fixedly mounted on the first operating table (7); the two second limiting cylinders (401) respectively correspond to the sector gear connecting rod bracket (102) and the connecting rod bracket (103) of the rear linkage tube (1) of the seat; the clamping rod (402) is fixedly mounted on the telescopic end of the two second limiting cylinders (401) for The clamping hole on the sector gear connecting rod bracket (102) or the connecting rod bracket (103) is clamped; a clamping tooth limit block (403) is fixedly installed on the telescopic end of the limit cylinder 2 (401) corresponding to the sector gear connecting rod bracket (102) for limiting the sector gear of the sector gear connecting rod bracket (102); a limit rod (404) is fixedly installed on the telescopic end of the limit cylinder 2 (401) corresponding to the connecting rod bracket (103) for limiting the connecting rod bracket (103).

6. The manufacturing mold for the seat rear linkage tube extrusion assembly according to claim 5, characterized in that: Two groups of lifting assemblies (5) are provided on the first operating platform (7) at the two ends of the tube body (101) of the rear seat linkage tube (1); each group of the lifting assemblies (5) comprises a first lifting cylinder (501), a driving plate (502) and a push plate (503); the first lifting cylinder (501) is fixedly mounted on the first operating platform (7), and its telescopic end is fixedly connected to the driving plate (502); the driving plate (502) is slidably mounted on the first operating platform (7), and is provided with a sloped limiting slide groove (5021); the push plate (503) is slidably mounted on the first operating platform (7), and is slidably connected to the limiting slide groove (5021), and is used to push out the rear seat linkage tube (1) on the lower mold (202) of the first operating platform (7).

7. The manufacturing mold for the seat rear linkage tube extrusion assembly according to claim 6, characterized in that: Two second lifting cylinders (6) are provided on the second operating platform (8) at the two ends of the tube body (101) of the seat rear linkage tube (1); the second lifting cylinders (6) are fixedly mounted on the second operating platform (8), and the telescopic ends thereof are used to push out the seat rear linkage tube (1) on the lower mold (202) of the second operating platform (8).

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