A chain assembly tool

Abstract

This utility model belongs to the field of harvester manufacturing technology and provides a chain assembly tool, including a support rod, a sliding seat, a gear, a first clamping rod, a second clamping rod, a backstop assembly, and a drive assembly. A rack along the length of the support rod is mounted on it. The sliding seat is slidably mounted on the support rod, and the gear is rotatably mounted on the sliding seat, meshing with the rack. The first clamping rod is connected to the end of the support rod, and the second clamping rod is connected to the sliding seat. The backstop assembly contacts the gear to allow it to rotate unidirectionally. The drive assembly drives the gear to rotate unidirectionally or releases the backstop assembly from contact with the gear. This utility model achieves high assembly efficiency and convenience by rapidly bringing the second and first clamping rods closer together, thereby bringing the two fixed shafts at both ends of the belt chain closer together. Then, the drive assembly drives the gear to rotate slightly in one direction, ensuring sufficient engagement between the two ends of the chain.

Description

Technical Field

[0001] This utility model relates to the field of harvester manufacturing technology, specifically to a chain assembly tool. Background Technology

[0002] During the installation of the harvester chain, the strip chain needs to be installed at the designated position on the harvester and the two ends need to be connected. In practice, it has been found that the chain is long and heavy. When the two ends of the strip chain are connected and assembled, the entire chain is in a taut state. It is difficult to bring the two ends close enough to be connected by relying solely on arm strength.

[0003] In existing technologies, the following methods are commonly used: Figure 1 The tensioner in the machine has a base 10, a drive shaft 11, a drive block 12, and two clamping arms 13. A drive hole 16 is provided on the base, and the drive shaft 11 is threadedly connected to the drive hole 16. The lower end of the drive shaft 11 is rotatably connected to the drive block 12, and both ends of the drive block 12 have drive windows 14 that allow the clamping arms to pass through. The upper ends of the clamping arms 13 are hinged to the base. A handle 15 drives the drive shaft 11 to rotate, causing the drive shaft 11 to move vertically, which in turn moves the drive block 12 downwards, thus bringing the two clamping arms 13 closer together, thus engaging the chain of the harvester. Figure 2 The fixed shafts 90 at both ends clamp and bring the chain ends close together before inserting the pin to complete the connection. However, the aforementioned tensioner requires multiple turnings of the drive shaft, resulting in a slow, inefficient, and inconvenient chain connection assembly process. Utility Model Content

[0004] In view of the shortcomings of the prior art, the present invention provides a chain assembly tool, which can solve or at least alleviate one or more of the above-mentioned problems and other problems existing in the prior art.

[0005] This utility model provides a chain assembly tool, including:

[0006] A support rod, on which a rack is laid along its length;

[0007] A sliding seat, which is slidably mounted on the support rod;

[0008] A gear, which is rotatably mounted on the sliding seat, and meshes with the rack;

[0009] A first clamping rod is connected to the end of the support rod;

[0010] The second clamping rod is connected to the sliding seat. The second clamping rod and the first clamping rod can cooperate to drive the two fixed shafts on the chain to move closer to each other.

[0011] A backstop assembly, disposed on the sliding seat, the backstop assembly being configured to contact the gear to cause the gear to rotate unidirectionally; and

[0012] A drive assembly for driving the gear to rotate in one direction or releasing the backstop assembly from contact with the gear.

[0013] Preferably, the sliding seat has a mounting hole and a mounting window; the support rod is slidably engaged with the mounting hole; the mounting window communicates with the mounting hole; and the gear is rotatably disposed within the mounting window.

[0014] The driving component includes:

[0015] The U-shaped arm has two ends that are rotatably connected to the two sides of the sliding seat, and the rotation center line of the U-shaped arm coincides with the rotation center line of the gear.

[0016] A drive rod, which is connected to the middle of the U-shaped arm;

[0017] The first mounting post has its two ends connected to the inner walls on both sides of the U-shaped arm;

[0018] The first locking block has one end rotatably connected to the first mounting post through an opening, and the other end of the first locking block is located on the side of the gear.

[0019] A first protrusion is connected to the end of the first locking block away from the first mounting post, and the end of the first protrusion away from the first locking block can be inserted into the tooth groove of the gear; and

[0020] A first torsion spring is sleeved on the first mounting post. The two ends of the first torsion spring are respectively connected to the inner side of the first locking block and the U-shaped arm. The first torsion spring drives the first locking block to rotate so that the first protrusion is inserted into the tooth groove of the gear.

[0021] As the gear gradually approaches the first clamping rod during rotation, the first protrusion is positioned in front of the first mounting post in the direction of gear rotation.

[0022] Preferably, the backstop assembly includes:

[0023] The second mounting post has its two ends connected to the inner walls of both sides of the mounting window, respectively.

[0024] The second locking block is rotatably connected to the second mounting post through an opening;

[0025] A second torsion spring, sleeved on the outside of the second mounting post, with its two ends connected to the second locking block and the inner wall of the mounting window, respectively; and

[0026] The second protrusion is connected to the end of the second locking block facing the gear, and the second protrusion can be inserted into the tooth groove of the gear;

[0027] As the gear gradually approaches the first clamping rod during rotation, the second protrusion is positioned in front of the gear in the direction of rotation relative to the second mounting post; the second torsion spring drives the second protrusion to insert into the tooth groove of the gear.

[0028] Preferably, the gear is located between the second mounting post and the first clamping rod; the side of the second locking block facing away from the gear can abut against the inner wall of the mounting window; the end face of the first locking block away from the first protrusion is a first arc-shaped guide surface; the side of the second locking block away from the second mounting post and close to the gear is a second arc-shaped guide surface; when the drive rod rotates close to the second locking block, the first arc-shaped guide surface of the first locking block can abut against the second arc-shaped guide surface on the second locking block.

[0029] Preferably, the end of the first clamping rod away from the support rod is connected to a first hook; the end of the second clamping rod away from the sliding seat is connected to a second hook; the second hook corresponds to the first hook.

[0030] Preferably, the end of the first clamping rod away from the support rod is connected to a third hook; the end of the second clamping rod away from the sliding seat is connected to a fourth hook; the third hook and the fourth hook correspond to each other; the plane containing the center line of the third hook is perpendicular to the plane containing the center line of the first hook.

[0031] Preferably, a limiting block is connected to one end of the support rod away from the first clamping rod; the limiting block can abut against the sliding seat; the sliding seat is located between the first clamping rod and the limiting block.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] In this invention, the sliding seat slides rapidly on the support rod, and the second clamping rod on the sliding seat and the first clamping rod on the support rod move closer to each other, thereby driving the two fixed shafts at both ends of the strip chain to move closer to each other. Then, the drive assembly drives the gear to rotate slightly in one direction, so that the two ends of the strip chain can be sufficiently connected. This results in high assembly efficiency and improved convenience. Attached Figure Description

[0034] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0035] Figure 1 This is a schematic diagram of a tension device in the prior art;

[0036] Figure 2 This is a schematic diagram of the chain conveyor structure in a harvester in the prior art;

[0037] Figure 3 This is a schematic diagram of a chain assembly tool performing chain docking assembly according to one embodiment of the present invention;

[0038] Figure 4 for Figure 3 A three-dimensional view of the assembly tool for the middle chain conveyor;

[0039] Figure 5 for Figure 4 Another 3D view (without gears, first locking block and second locking block);

[0040] Figure 6 for Figure 4 A schematic diagram of the internal structure at point S.

[0041] Figure label:

[0042] 10. Base; 11. Drive shaft; 12. Drive block; 13. Clamping arm; 14. Drive window; 15. Handle; 16. Drive hole;

[0043] 20. Support rod; 21. Rack; 22. Limiting block;

[0044] 30. Sliding seat; 31. Mounting hole; 32. Mounting window;

[0045] 40. Gear;

[0046] 50. First clamping rod; 51. First hook; 52. Third hook;

[0047] 60. Second clamping rod; 61. Second hook; 62. Fourth hook;

[0048] 70. Backstop assembly; 71. Second mounting post; 72. Second locking block; 73. Second torsion spring; 74. Second protrusion; 75. Second arc-shaped guide surface;

[0049] 80. Drive assembly; 81. U-shaped arm; 82. Drive rod; 83. First mounting post; 84. First locking block; 85. First protrusion; 86. First arc-shaped guide surface; 87. First torsion spring;

[0050] 90. Fixed shaft. Detailed Implementation

[0051] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0052] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

[0053] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", 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 are not intended to 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.

[0054] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.

[0055] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0056] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0057] See Figures 1 to 6 This embodiment provides a chain assembly tool, including a support rod 20, a sliding seat 30, a gear 40, a first clamping rod 50, a second clamping rod 60, a backstop assembly 70, and a drive assembly 80. The chain assembly is mainly used on harvesters, such as... Figure 2 As shown.

[0058] A rack 21 extending along the length of the support rod 20 is mounted on it. A sliding seat 30 is slidably mounted on the support rod 20. A gear 40 is rotatably mounted on the sliding seat 30, and the gear 40 meshes with the rack 21. A first clamping rod 50 is connected to the end of the support rod 20. A second clamping rod 60 is connected to the sliding seat 30, and the second clamping rod 60 and the first clamping rod 50 can cooperate to drive the two fixed shafts 90 at both ends of the chain to move closer together. Figure 2 The shaft between the two fixed shafts 90 is a pin. A backstop assembly 70 is mounted on the sliding seat 30. The backstop assembly 70 is used to contact the gear 40 to allow the gear 40 to rotate in one direction. The drive assembly 80 is used to drive the gear 40 to rotate in one direction or to release the backstop assembly 70 from contact with the gear 40.

[0059] See Figure 3 In this embodiment, the sliding seat 30 slides quickly on the support rod 20. The second clamping rod 60 on the sliding seat 30 and the first clamping rod 50 on the support rod 20 move closer to each other, which in turn drives the two fixed shafts 90 at both ends of the belt chain to move closer to each other. Then, the drive assembly 80 drives the gear 40 to rotate further in one direction, so that the two ends of the belt chain reach a sufficient degree of docking and then the pin is inserted. The chain docking can be completed in a single operation, which has high docking and assembly efficiency and improved convenience.

[0060] In one embodiment, the sliding seat 30 is provided with a mounting hole 31 and a mounting window 32; the support rod 20 is slidably engaged with the mounting hole 31; the mounting window 32 is connected to the mounting hole 31; and the gear 40 is rotatably disposed in the mounting window 32.

[0061] The drive assembly 80 includes: a U-shaped arm 81, a drive rod 82, a first mounting post 83, a first locking block 84, a first protrusion 85, and a first torsion spring 87.

[0062] The two ends of the U-shaped arm 81 are rotatably connected to the two sides of the sliding seat, and the rotation center line of the U-shaped arm 81 coincides with the rotation center line of the gear 40.

[0063] The drive rod 82 is connected to the middle of the U-shaped arm 81. Both ends of the first mounting post 83 are connected to the inner walls of both sides of the U-shaped arm 81. One end of the first locking block 84 is rotatably connected to the first mounting post 83 through an opening, and the other end of the first locking block 84 is located on the side of the gear 40. The U-shaped arm 81 is located between the support rod 20 and the drive rod 82, and the gear 40 is located between the first mounting post 83 and the support rod 20. The hole on the first mounting post 83 is clearance-fitted with the first mounting post 83.

[0064] The first protrusion 85 is connected to the end of the first locking block 84 away from the first mounting post 83, and the end of the first protrusion 85 away from the first locking block 84 can be inserted into the tooth groove of the gear 40. The first torsion spring 87 is sleeved on the first mounting post 83, and the two ends of the first torsion spring 87 are respectively connected to the inner side of the first locking block 84 and the U-shaped arm 81. The first torsion spring 87 drives the first locking block 84 to rotate so that the first protrusion 85 is inserted into the tooth groove of the gear 40.

[0065] As gear 40 gradually approaches the first clamping rod 50 during rotation, the first protrusion 85 is positioned in front of the first mounting post 83 in the direction of gear 40's rotation. Figures 4-6 In the gear 40, as it rotates clockwise, it gradually approaches the first clamping rod 50 on the right. The first protrusion 85 and the first mounting post 83 are distributed in the clockwise rotation direction of the gear 40, with the first protrusion 85 located in front. This causes the first protrusion 85 on the first locking block 84 to insert into the tooth groove of the gear 40 under the action of the first torsion spring 87. The gear 40 can only rotate clockwise. Once the gear 40 rotates counterclockwise, the first protrusion 85 is driven to the left by the gear 40 and thus locks itself, achieving unidirectional rotation of the gear 40.

[0066] In this embodiment, as Figure 5 The sliding seat 30 drives the second clamping rod 60 to approach the first clamping rod 50 at the end of the support rod 20. Then, the ends of the first clamping rod 50 and the second clamping rod 60 are inserted into the sides of the fixed shafts 90 at both ends of the chain. As the first clamping rod 50 and the second clamping rod 60 approach each other, the two fixed shafts 90 at both ends of the chain approach each other. Then, by pushing... Figures 4-6The clockwise rotation of the drive rod 82, utilizing the lever principle, causes the first protrusion 85 on the lower end of the first locking block 84 to further rotate the gear 40, causing the sliding seat 30 to move further to the right and closer to the first clamping rod 50. This brings the fixed shafts 90 at both ends of the chain at the lower ends of the first clamping rod 50 and the second clamping rod 60 close enough to meet the docking distance requirements. Because of the lever principle, the drive rod 82 can be pushed relatively easily, making operation more effortless and convenient. Simultaneously, with the drive rod 82 stationary, the gear 40 cannot rotate counterclockwise, thus locking the gear 40.

[0067] In one embodiment, the backstop assembly 70 includes: a second mounting post 71, a second locking block 72, a second torsion spring 73, and a second protrusion 74.

[0068] The two ends of the second mounting post 71 are connected to the inner walls of both sides of the mounting window 32, respectively. The second mounting post 71 is parallel to the first mounting post 83, and the axis of the second mounting post 71 is parallel to the axis of the gear 40. The second locking block 72 is rotatably connected to the second mounting post 71 through an opening, and the through hole on the second locking block 72 is clearance-fitted with the second mounting post 71. The second torsion spring 73 is sleeved on the outside of the second mounting post 71, and the two ends of the second torsion spring 73 are connected to the second locking block 72 and the inner wall of the mounting window 32, respectively. The second protrusion 74 is connected to the end of the second locking block 72 facing the gear 40, and the second protrusion 74 can be inserted into the tooth groove of the gear 40. When the gear 40 gradually approaches the first clamping rod 50 during rotation, the second protrusion 74 is located in front of the gear 40 in the direction of rotation relative to the second mounting post 71; the second torsion spring 73 drives the second protrusion 74 to insert into the tooth groove of the gear 40. The first torsion spring 87 and the second torsion spring 73 can each be provided in pairs, respectively disposed on both sides of the corresponding first locking block 84 and second locking block 72. More specifically, as... Figures 4-6 In the gear 40, when the gear 40 rotates clockwise, the surface of the first protrusion 85 that contacts the gear teeth of the gear 40 is approximately parallel to the surface of the corresponding gear teeth; when the gear 40 rotates counterclockwise, the surface of the first protrusion 85 that contacts the gear teeth of the gear 40 has a certain angle with the surface of the corresponding gear teeth, so that the rotation of the gear 40 can push the first protrusion 85 out of the tooth groove of the gear 40. The cooperation between the first protrusion 85 and the gear can be referred to as the cooperation between ratchet and ratchet. The cooperation between the second protrusion 74 and the gear 40 is similar.

[0069] In this embodiment, as Figures 4-6In this configuration, clockwise rotation of gear 40 causes the second clamping rod 60 to gradually approach the first clamping rod 50. Under the action of the second torsion spring 73, the second locking block 72 tends to rotate clockwise, and the second protrusion 74 on the second locking block 72 inserts into the tooth groove of gear 40. When gear 40 rotates clockwise, the second protrusion 74, guided by the inner wall of the tooth groove of gear 40, causes the second locking block 72 to intermittently rotate counterclockwise by a small angle before resuming clockwise rotation to approach gear 40. When gear 40 rotates counterclockwise, the second protrusion 74, within the tooth groove of gear 40, causes gear 40 to drive the second locking block 72 to rotate clockwise. The second protrusion 74 tends to move towards the center of gear 40, thereby locking gear 40 and achieving unidirectional rotation of gear 40. During operation, the first locking block 84 can be moved repeatedly by the drive rod 82 to drive the gear 40 to rotate multiple times. In conjunction with the second protrusion 74 on the second locking block 72 to lock the gear 40 in one direction, the two ends of the chain will keep getting closer.

[0070] In one embodiment, such as Figures 4-6 In this configuration, gear 40 is located between the second mounting post 71 and the first clamping rod 50. The side of the second locking block 72 facing away from gear 40 can abut against the inner wall of the mounting window 32. The end face of the first locking block 84 away from the first protrusion 85 is a first arc-shaped guide surface 86; the side of the second locking block 72 away from the second mounting post 71 and close to gear 40 is a second arc-shaped guide surface 75; when the drive rod 82 rotates and approaches the second locking block 72, the first arc-shaped guide surface 86 of the first locking block 84 can abut against the second arc-shaped guide surface 75 on the second locking block 72.

[0071] In this embodiment, when the chain assembly is completed, the drive rod 82... Figures 4-6 The drive rod 82 rotates counterclockwise, causing the first locking block 84 to rotate as well. The first arc-shaped guide surface 86 on the upper end of the first locking block 84 gradually comes into contact with the second arc-shaped guide surface 75 on the side of the second locking block 72, thus moving the second locking block 72 away from the gear 40. The one-way locking of the second protrusion 74 onto the gear 40 is released. The first locking block 84 then rotates further with the drive rod 82, and the first arc-shaped guide surface 86 on the first locking block 84 gradually comes into complete contact with the second arc-shaped guide surface 75 of the second locking block 72 (the two surfaces gradually become concentric). This causes the first locking block 84 to rotate counterclockwise a small angle on the first mounting post 83, thus moving the first protrusion 85 on the first locking block 84 away from the gear 40 and releasing the one-way locking of the gear 40. At this point, the sliding seat 30 can slide freely on the support rod 20. In other words, by rotating the drive rod 82 counterclockwise, the gear 40 can be quickly unlocked.

[0072] In one embodiment, the end of the first clamping rod 50 away from the support rod 20 is connected to a first hook 51; the end of the second clamping rod 60 away from the sliding seat 30 is connected to a second hook 61; the second hook 61 corresponds to the first hook 51.

[0073] In this embodiment, as the second clamping rod 60 and the first clamping rod 50 approach each other, the first hook 51 and the second hook 61 hook the fixed shaft 90 on both ends of the chain, thereby stably pulling the two ends of the chain and preventing the fixed shaft 90 from detaching from the device.

[0074] In one embodiment, the end of the first clamping rod 50 away from the support rod 20 is connected to a third hook 52; the end of the second clamping rod 60 away from the sliding seat 30 is connected to a fourth hook 62; the third hook 52 and the fourth hook 62 correspond to each other; the plane containing the center line of the third hook 52 is perpendicular to the plane containing the center line of the first hook 51.

[0075] In this embodiment, by adding a third hook 52 and a fourth hook 62, the device can hook the fixed shafts 90 at both ends of the chain from another angle, making it more flexible and convenient to use.

[0076] In one embodiment, a limiting block 22 is connected to one end of the support rod 20 away from the first clamping rod 50; the limiting block 22 can abut against the sliding seat 30; the sliding seat 30 is located between the first clamping rod 50 and the limiting block 22. By setting the limiting block 22, which cooperates with the first clamping rod 50, the sliding seat 30 is prevented from slipping off the support rod 20.

[0077] Numerous specific details are set forth in this specification. However, it will be understood that embodiments of this invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model.

Claims

1. A chain assembly tool characterized by, include: A support rod (20) is provided with a rack (21) along its length; A sliding seat (30) is slidably mounted on the support rod (20); A gear (40) is rotatably mounted on the sliding seat (30), and the gear (40) meshes with the rack (21); A first clamping rod (50) is connected to the end of the support rod (20); The second clamping rod (60) is connected to the sliding seat (30). The second clamping rod (60) and the first clamping rod (50) can cooperate to drive the two fixed shafts (90) on the chain to move closer to each other. A backstop assembly (70) is disposed on the sliding seat (30) and is used to contact the gear (40) to make the gear (40) rotate in one direction; as well as A drive assembly (80) is used to drive the gear (40) to rotate in one direction or to release the backstop assembly (70) from contact with the gear (40).

2. A chain assembly tool as claimed in claim 1, wherein, The sliding seat (30) is provided with a mounting hole (31) and a mounting window (32); the support rod (20) is slidably engaged with the mounting hole (31); the mounting window (32) is connected to the mounting hole (31); the gear (40) is rotatably disposed in the mounting window (32); The driving component (80) includes: The U-shaped arm (81) has two ends that are rotatably connected to the two sides of the sliding seat (30), and the rotation center line of the U-shaped arm (81) coincides with the rotation center line of the gear (40). A drive rod (82) is connected to the middle of the U-shaped arm (81); The first mounting post (83) has its two ends connected to the inner walls on both sides of the U-shaped arm (81); The first locking block (84) has one end rotatably connected to the first mounting post (83) through an opening, and the other end of the first locking block (84) is located on the side of the gear (40). A first protrusion (85) is connected to the end of the first locking block (84) away from the first mounting post (83), and the end of the first protrusion (85) away from the first locking block (84) can be inserted into the tooth groove of the gear (40); and A first torsion spring (87) is sleeved on the first mounting post (83). The two ends of the first torsion spring (87) are respectively connected to the inner side of the first locking block (84) and the U-shaped arm (81). The first torsion spring (87) drives the first locking block (84) to rotate so that the first protrusion (85) is inserted into the tooth groove of the gear (40). As the gear (40) gradually approaches the first clamping rod (50) during rotation, the first protrusion (85) is located in front of the gear (40) in the direction of rotation relative to the first mounting post (83).

3. A chain assembly tool as claimed in claim 2, wherein The backstop assembly (70) includes: The second mounting post (71) has two ends connected to the inner walls of both sides of the mounting window (32); The second locking block (72) is rotatably connected to the second mounting post (71) through an opening; A second torsion spring (73) is sleeved on the outside of the second mounting post (71), and both ends of the second torsion spring (73) are respectively connected to the second locking block (72) and the inner wall of the mounting window (32); and The second protrusion (74) is connected to the end of the second locking block (72) facing the gear (40), and the second protrusion (74) can be inserted into the tooth groove of the gear (40); As the gear (40) gradually approaches the first clamping rod (50) during rotation, the second protrusion (74) is located in front of the gear (40) in the direction of rotation relative to the second mounting post (71); the second torsion spring (73) drives the second protrusion (74) to insert into the tooth groove of the gear (40).

4. A chain assembly tool as claimed in claim 3, wherein, The gear (40) is located between the second mounting post (71) and the first clamping rod (50); the side of the second locking block (72) facing away from the gear (40) can abut against the inner wall of the mounting window (32); the end face of the first locking block (84) away from the first protrusion (85) is a first arc-shaped guide surface (86); the side of the second locking block (72) away from the second mounting post (71) and close to the gear (40) is a second arc-shaped guide surface (75); when the drive rod (82) rotates close to the second locking block (72), the first arc-shaped guide surface (86) of the first locking block (84) can abut against the second arc-shaped guide surface (75) on the second locking block (72).

5. A chain assembly tool as claimed in claim 4, wherein, The first clamping rod (50) is connected to a first hook (51) at one end away from the support rod (20); the second clamping rod (60) is connected to a second hook (61) at one end away from the sliding seat (30); the second hook (61) corresponds to the first hook (51).

6. A chain assembly tool as claimed in claim 5, wherein, The first clamping rod (50) is connected to a third hook (52) at one end away from the support rod (20); the second clamping rod (60) is connected to a fourth hook (62) at one end away from the sliding seat (30); the third hook (52) and the fourth hook (62) correspond to each other; the plane containing the center line of the third hook (52) is perpendicular to the plane containing the center line of the first hook (51).

7. A chain assembly tool as described in claim 6, characterized in that, A limiting block (22) is connected to one end of the support rod (20) away from the first clamping rod (50); the limiting block (22) can abut against the sliding seat (30); the sliding seat (30) is located between the first clamping rod (50) and the limiting block (22).

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