Chain connection press fitting tool

Abstract

The utility model relates to a chain connection press fitting tool which at least comprises a base, a chain fixing seat, a press fitting mechanism and a driving assembly, and positioning grooves which are arranged in parallel are formed in the base at intervals in the linear direction. The press-fitting mechanism comprises a pressing seat movably connected with the base, positioning pin shafts in one-to-one correspondence with the two adjacent positioning grooves and a pressing head arranged on the positioning pin shafts in a sleeving mode, and the positioning pin shafts have an extending state and a retracting state in the pressing head and are configured to move between the extending state and the retracting state. The positioning pin shaft is mounted in the pressing seat; and an elastic element is arranged between the positioning pin shaft and the base. And the chain fixing seat is fixedly connected with the base. The driving assembly drives the press-fitting mechanism to be close to the chain fixing base and drives the positioning pin shaft to be switched between the stretching-out state and the retracting state. The chain connection press-fitting tool has the advantages of being compact in structure, high in chain positioning accuracy, capable of accurately applying force between the chain plate and the pin shaft, easy to install the chain plate and the pin shaft, high in installation efficiency, good in safety and good in press-fitting effect.

Description

Technical Field

[0001] This utility model relates to the field of chain assembly technology, and in particular to a chain connection press-fitting tool. Background Technology

[0002] Chain drive is a common type of mechanical transmission that uses the interaction between a chain and sprockets to transfer power from an engine or electric motor to other equipment or components. Chain drives are characterized by high transmission efficiency, large transmission power, and long service life, and are widely used in various mechanical equipment.

[0003] like Figure 11 As shown, chain 6 is generally composed of inner chain plate 61, outer chain plate 62, pin 63, and roller 64. The inner chain plate 61 and roller 64 form the inner chain link, while the outer chain plate 62 and pin 63 form the outer chain link through an interference fit. The connecting chain is constructed by alternating hinges of multiple inner and outer chains. Chain joints are typically connected using pins and connecting pins for easy installation and disassembly. However, for chains with special requirements, connecting pins cannot be used, and the chain plate and pin must be directly connected. Because the chain plate and pin have an interference fit, assembly requires considerable force, necessitating the use of traditional tools such as hammers and vises to tighten them. Traditional methods have some technical drawbacks:

[0004] (1) The chain is suspended in the air during assembly without corresponding support points, making it difficult to accurately position and bear force, and making it difficult to install the chain plate and the pin. Due to the repeated application of large forces to the chain with traditional tools such as hammers and vises, the chain and chain plate may even be damaged.

[0005] (2) The chain is assembled using traditional tools, which results in low installation efficiency, poor safety and difficulty in ensuring the pressing effect. Summary of the Invention

[0006] The technical problem to be solved by this utility model is to provide a chain connection pressing tool with a compact structure, high chain positioning accuracy, accurate force application between the chain plate and the pin, easy installation of the chain plate and the pin, high installation efficiency, good safety, and good pressing effect.

[0007] To solve the above-mentioned technical problems, the present invention provides a chain connection pressing fixture, which includes at least:

[0008] The base protrudes outward to form a fixing part, and a plurality of positioning grooves extending downward from the top and arranged in parallel are provided on one side of the fixing part along a straight line.

[0009] The pressing mechanism includes at least a pressing seat near the positioning groove and movably connected to the base along the direction perpendicular to the positioning groove arrangement, a positioning pin corresponding to each of the two adjacent positioning grooves, and a pressing head sleeved on the positioning pin and fixedly connected to the pressing seat near the positioning groove. The free end of the positioning pin has an extended state and a retracted state in the pressing head and is configured to be movable between the extended state and the retracted state. The other end of the positioning pin is installed in the pressing seat, and an elastic element is provided between the end face of the positioning pin and the base.

[0010] A chain fixing seat is located between the fixing part and the pressing mechanism and is fixedly connected to the base. The top of the chain fixing seat is provided with a plurality of downwardly recessed grooves at intervals along the arrangement direction of the positioning grooves to form grooves that match the positioning grooves. A protrusion is formed between the grooves.

[0011] A drive assembly drives the pressing mechanism to approach the chain fixing seat and causes the positioning pin to switch between an extended state and a retracted state.

[0012] In a preferred embodiment, the base protrudes outward near the positioning groove to form a mounting portion, a guide groove is formed between the mounting portion and the fixing portion, the chain fixing seat is installed in the guide groove, the mounting portion is provided with a mounting cavity communicating with the guide groove, and the pressing mechanism is installed in the mounting cavity.

[0013] In a preferred embodiment, the groove is a U-shaped groove with a bottom arc surface, the groove includes a first groove and a second groove, the arc surface is on the same axis as the positioning pin, and the chain fixing seat has a step on the side away from the mounting cavity.

[0014] In a preferred embodiment, the pressure base includes a pressure block, a first mounting hole is provided at the center of the pressure block, and second mounting holes are symmetrically provided on both sides of the first mounting hole, corresponding one-to-one with the first groove and the second groove, penetrating the pressure block. The pressure head is embedded in the second mounting hole and fixedly connected to the pressure block.

[0015] In a preferred embodiment, the pressure head includes a connecting section adapted to the second mounting hole and a guide section one formed by axial stretching of the connecting section. The outer diameter of the guide section one is larger than the outer diameter of the connecting section. The pressure head is provided with a through hole along the axial direction. The positioning pin includes a working section whose outer diameter is adapted to the through hole and a guide section two formed by axial stretching of the working section. The outer diameter of the guide section two is larger than the outer diameter of the working section.

[0016] In a preferred embodiment, the outer walls on both sides of the pressure block extend outward to form symmetrically arranged sliding portions, and the inner walls on both sides of the mounting cavity are symmetrically arranged with slides adapted to the sliding portions along the direction perpendicular to the arrangement of the grooves.

[0017] In a preferred embodiment, the inner walls on both sides of the mounting cavity are provided with clearance grooves that communicate with the sliding part and are adapted to the sliding part.

[0018] In a preferred embodiment, the pressure seat further includes an elastic element fixing seat, the elastic element fixing seat includes a fixing seat body, the fixing seat body has a cavity with an open bottom, the bottom outer wall of the cavity extends outward to form a mounting part, and the elastic element fixing seat is fixedly connected to the pressure block through the mounting part.

[0019] In a preferred embodiment, the elastic element is installed in the cavity, the opening of the cavity is adapted to the outer diameter of the guide section two of the positioning pin, the working section of the positioning pin passes through the through hole and the guide section two extends into the cavity and abuts against the elastic element.

[0020] In a preferred embodiment, the drive assembly includes a clamping bolt, with a mounting hole three at one end of the clamping bolt away from the nut, and a threaded hole adapted to the clamping bolt on the side wall of the mounting cavity away from the guide groove. The end of the clamping bolt away from the nut passes through the threaded hole and is fixedly connected to the mounting hole one of the pressure block through the mounting hole three.

[0021] Compared with the prior art, the chain connection pressing fixture of this utility model has the following advantages:

[0022] (1) The chain connection pressing fixture of this utility model includes a base, a chain fixing seat, a pressing mechanism, and a drive assembly. The base protrudes outward to form a fixing part. On one side of the fixing part, several positioning grooves extending downward from the top and arranged in parallel are arranged at intervals along a straight line. The chain fixing seat is located between the fixing part and the pressing mechanism and is fixedly connected to the base. The top of the chain fixing seat has several downward recesses arranged at intervals along the arrangement direction of the positioning grooves to form grooves that match the positioning grooves. Protrusions are formed between the grooves. In this structural design, the shape of the grooves is adapted to the rollers of the chain, and the shape of the protrusions is adapted to the gap between the rollers of the chain. During the assembly process of the chain plate and the pin, the chain is fixed in all directions, solving the problem of the chain being suspended and unable to bear force. It has the advantages of compact structure and high chain positioning accuracy.

[0023] (2) The chain connection pressing fixture of this utility model includes at least a pressing base that is close to the positioning groove and is movably connected to the base along the vertical positioning groove arrangement direction, a positioning pin that corresponds to two adjacent positioning grooves one by one, and a pressing head that is sleeved on the positioning pin and fixedly connected to the pressing base close to the positioning groove. The free end of the positioning pin has an extended state and a retracted state in the pressing head and is configured to be movable between the extended state and the retracted state. The other end of the positioning pin is installed in the pressing base and an elastic element is provided between the end face of the positioning pin and the base. The chain plate is placed on the positioning pin through the chain plate hole and abuts against the pressure head. The drive component drives the pressing mechanism to approach the chain fixing seat, ensuring that the chain plate hole and the pin on the chain are accurately positioned during the assembly process. When the positioning pin abuts against the two pins on the chain, the positioning pin switches from the extended state to the retracted state. At the same time, the pressure head continues to press the chain plate closer to the chain under the action of the drive component, so that the chain plate hole connects with the pin on the chain. The structure is simple, the installation efficiency is high, and the force applied to the chain plate is precise and uniform in direction and magnitude, avoiding damage to the chain and chain plate.

[0024] (3) The drive assembly of this utility model includes a clamping bolt. The end of the clamping bolt away from the nut passes through the threaded hole and is fixedly connected to the mounting hole one of the pressure block through the mounting hole three. Only by manually rotating the clamping bolt can the chain plate and the pin on the chain be interference-fitted. Moreover, the preload of the clamping bolt can effectively control the installation strength of the chain plate and the pin on the chain, ensuring the clamping effect. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of a chain connection pressing tool according to this embodiment;

[0026] Figure 2 This is a schematic diagram of the base of a chain connection pressing fixture according to this embodiment;

[0027] Figure 3 This is a schematic diagram of the chain fixing seat of a chain connection pressing tool according to this embodiment;

[0028] Figure 4 This is a cross-sectional view of the overall assembly structure of a chain connection press-fitting fixture according to this embodiment;

[0029] Figure 5 This is a schematic diagram of the structure of the pressure block of a chain-connected pressing tool according to this embodiment;

[0030] Figure 6 This is a schematic diagram of the pressure head of a chain connection pressing tool according to this embodiment;

[0031] Figure 7 This is a schematic diagram of the elastic element fixing seat of a chain connection press fitting tool according to this embodiment;

[0032] Figure 8 This is a structural cross-sectional view of the elastic element fixing seat of a chain connection press fitting tool according to this embodiment;

[0033] Figure 9 This is a schematic diagram of the positioning pin of a chain connection press fitting tool according to this embodiment;

[0034] Figure 10 This is a schematic diagram of the clamping bolt of a chain connection press-fitting fixture according to this embodiment;

[0035] Figure 11 This is a schematic diagram of a chain structure in the prior art.

[0036] Explanation of reference numerals in the attached drawings: 1-base, 11-fixed seat, 12-positioning groove, 13-mounting part, 14-guide groove, 15-mounting cavity, 151-slide rail, 152-clearance groove, 153-threaded hole, 2-pressing mechanism, 21-pressing seat, 211-pressing block, 2111-mounting hole one, 2112-mounting hole two, 2113-sliding part, 2114-mounting hole four, 212-elastic element fixing seat, 2121-fixed seat body, 2122-cavity, 2123-connecting part, 2124-mounting Hole 5, 22-Positioning pin, 221-Working section, 222-Guide section 2, 23-Pressure head, 231-Connecting section, 232-Guide section 1, 233-Through hole, 24-Elastic element, 3-Chain fixing seat, 31-Groove, 311-Arc surface, 312-First groove, 313-Second groove, 32-Protrusion, 33-Step, 4-Drive assembly, 41-Pressure bolt, 411-Mounting hole 3, 5-Handle, 6-Chain, 61-Inner chain plate, 62-Outer chain plate, 63-Pin, 64-Roller. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0038] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0039] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to the internal connection of two components; they can refer to a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0040] This embodiment provides a chain connection press-fitting fixture, such as... Figure 1 As shown, the assembly includes a base 1, a pressing mechanism 2, a chain fixing seat 3, a drive assembly 4, and a handle 5. The handle 5 is fixedly connected to the base 1. During the assembly process of the outer chain plate 62 and the pin 63 of the chain 6, force is applied to the handle to ensure that the base 1 does not slip during assembly. The chain plate fixing seat is fixedly connected to the base.

[0041] like Figure 2 As shown, the base protrudes outward to form a fixing part 11. A plurality of parallel positioning grooves 12 extending downward from the top are spaced along one side of the fixing part in a straight line. In this embodiment, there are two positioning grooves, the shape of which matches the shape of the pin 63 of the chain 6. A mounting part 13 protrudes outward near the positioning grooves on the base. A guide groove 14 is formed between the mounting part and the fixing part, extending through the base 1. The mounting part has a mounting cavity 15 that communicates with the guide groove.

[0042] like Figure 1 and 3 As shown, the chain fixing seat 3 is installed in the guide groove 14. The top of the chain fixing seat has several downwardly recessed grooves 31 spaced along the arrangement direction of the positioning grooves, forming grooves 31 that match the positioning grooves. Protrusions 32 are formed between the grooves. In this embodiment, the grooves 31 include a first groove 312 and a second groove 313. The protrusions 32 are located between the first and second grooves. The grooves are U-shaped grooves with a bottom arc surface 311, which matches the shape of the rollers 64 in the chain 6 to be installed. The shape of the protrusions 32 matches the gap between the chain rollers. A step 23 is provided on the side of the chain fixing seat away from the mounting cavity 15. During the installation of the chain plate and the chain, two adjacent rollers 51 of the chain section to be installed are embedded into the first and second grooves. The protrusions 22 located between the first and second grooves are correspondingly embedded into the gap between the two rollers, thus fixing the chain in all directions. This ensures that the chain will not slip during assembly and ensures accurate positioning between the pin of the section to be installed and the chain plate hole of the chain plate to be installed.

[0043] The chain 6 to be installed is mounted in the guide groove of the base via the chain fixing seat 3, with the chain's extension direction aligned with the through direction of the guide groove on the base and the arrangement direction of the grooves on the chain fixing seat. The chain fixing seat has a stepped side that forms a gap groove with the inner wall of the guide groove away from the mounting cavity, used to accommodate the outer chain plate 62 already installed on the side of the chain away from the mounting cavity. The other side of the chain fixing seat forms a gap groove with the inner wall of the guide groove near the mounting cavity, used to accommodate the outer chain plate 62 already installed on the side of the chain near the mounting cavity. The positioning groove is used for radial positioning of two adjacent pins of the chain section to be installed, preventing tilting due to pressure on the pins, which would result in poor pressing effect between the chain plate and the pins.

[0044] like Figure 4 As shown, the pressing mechanism is installed in the mounting cavity 15. The pressing mechanism includes at least a pressing base 21 that is close to the positioning groove and is movably connected to the base along the vertical positioning groove arrangement direction, a positioning pin 22 that corresponds to two adjacent positioning grooves one by one, and a pressing head 23 that is sleeved on the positioning pin and fixedly connected to the pressing base close to the positioning groove. The free end of the positioning pin has an extended state and a retracted state in the pressing head and is configured to be movable between the extended state and the retracted state. The other end of the positioning pin is installed in the pressing base and an elastic element 24 is provided between the end face of the positioning pin and the base.

[0045] In this embodiment, the pressure base 21 includes a pressure block 211 and an elastic element fixing base 212, such as Figure 5 As shown, a mounting hole 2111 is provided at the center of the pressure block. On both sides of the mounting hole 2111, mounting holes 2112 are provided symmetrically, corresponding to the first groove and the second groove, and penetrate the pressure block. The mounting holes 2112 are coaxial with the central axis of the bottom arc surface of the first groove and the second groove, so that the pressure head 31 can be embedded and fixedly connected to the pressure block, ensuring that the pressure head and the positioning pin are coaxial with the central axis of the bottom arc surface of the first groove and the second groove.

[0046] The outer walls on both sides of the pressure block 211 extend outward to form symmetrically arranged sliding portions 2113, corresponding to, as Figure 2 As shown, the mounting cavity 15 of the base 1 has symmetrically arranged slide rails 1511 on both sides of the mounting cavity 15 along the direction perpendicular to the arrangement of the first and second grooves, which are adapted to the sliding part. The pressure block 211 can freely move closer to and away from the chain fixing seat through the sliding part and the slide rail. The inner walls of both sides of the mounting cavity 15 of the base 1, away from the guide groove 11, are provided with relief grooves 152 that communicate with the slide rails 151. The shape of the relief groove is adapted to the sliding part 2113 of the pressure block and is used to install the pressure block. The pressure block is provided with mounting holes four 2114 for installing the elastic element fixing seat 212. The two mounting holes four are located on the upper and lower sides of the mounting hole two 2112, respectively.

[0047] like Figure 6As shown, the pressure head 23 includes a connecting section 231 adapted to the second mounting hole and a guide section 232 formed by the axial stretching of the connecting part. The outer diameter of the guide section is larger than the outer diameter of the connecting section, and the pressure head is provided with a through hole 233 along the axial direction. When the pressure head is installed with the pressure block, the connecting section is embedded into the pressure block through the second mounting hole, and the side of the guide section near the connecting section abuts against the pressure block to ensure that the pressure block is fixedly connected to the pressure block.

[0048] like Figure 7-8 As shown, the elastic element fixing seat includes a fixing seat body 2121. The fixing seat body has a cavity 2122 with an open bottom. A spring is installed in the cavity. The bottom wall of the cavity extends outward to form a connecting part 2123. The connecting part is provided with a mounting hole 2124 that matches the mounting hole 2114 on the pressure block. The elastic element fixing seat is fixedly connected to the pressure block through the connecting part.

[0049] like Figure 9 As shown, the positioning pin includes a working section 221 whose outer diameter matches the through hole 233 of the pressure head, and a guide section 222 formed by axial stretching of the working section. The outer diameter of the guide section 222 is larger than that of the working section, and the outer diameter of the guide section 222 matches the opening of the cavity. The working section of the positioning pin passes through the through hole of the pressure head, and the guide section 222 extends into the cavity of the elastic element fixing seat 212 and abuts against the elastic element 24. The length of the working section of the positioning pin is greater than the length of the through hole of the pressure head.

[0050] like Figure 10 As shown, the drive assembly drives the pressing mechanism close to the chain fixing seat and causes the positioning pin to switch between an extended state and a retracted state. The drive assembly 4 includes a clamping bolt 41, and the end of the clamping bolt away from the nut is provided with a mounting hole 411, such as... Figure 1 As shown, the mounting cavity 12 of the base has a threaded hole 153 on the side wall away from the guide groove, which is adapted to the clamping bolt. The end of the clamping bolt away from the nut passes through the threaded hole. The mounting hole 3 411 of the clamping bolt and the mounting hole 1 of the pressure block 211 are fixedly connected by screws. The clamping bolt and the base are rotatably connected through the threaded hole 153.

[0051] The working principle of a chain connection press-fitting fixture in this embodiment:

[0052] The chain 6 to be installed is fixed in the guide groove of the base using the chain fixing seat 3, and the extension direction of the chain to be installed is consistent with the through direction of the guide groove on the base. Two adjacent rollers 64 of the section of the chain to be installed, where the outer chain plate 62 needs to be installed, are embedded into the first groove 312 and the second groove 313. Correspondingly, the protrusion 32 located between the first and second grooves is embedded into the gap between the two adjacent rollers. The outer chain plate 62 already installed on the side of the chain away from the mounting cavity is correspondingly embedded into the gap groove formed by the stepped side of the chain fixing seat and the inner wall of the guide groove on the side away from the mounting cavity. The installed outer chain plate 62 is in the gap groove and abuts against the inner wall of the guide groove. The outer chain plate 62 to be installed is installed onto the positioning pin 22 through the chain plate hole. The outer chain plate 62 and the positioning pin 22 are in clearance fit, with a clearance size of 0.02mm-0.04mm. Too large a clearance will cause the chain plate to wobble and be inaccurately positioned; too small a clearance will make installation of the chain plate and the positioning pin difficult.

[0053] Hold the handle 5 and apply force to the base to ensure it does not slip during installation. Tighten the nut of the clamping bolt with a wrench, which drives the pressure block to move along the slide 151. Since the pressure head and the positioning pin are coaxial with the central axis of the bottom arc surface of the first and second grooves, the positioning pin abuts against the pin 63 of the chain section to be installed as the pressure block moves. Driven by the clamping bolt, the pressure block continues to move toward the chain, while the clamping bolt causes the free end of the positioning pin to switch from the extended state of the pressure head to the retracted state. The positioning pin gradually compresses the spring located in the cavity, and the outer chain plate 62 moves toward the chain on the positioning pin under the action of the pressure head. The pressure head continues to compress the chain plate, and the outer chain plate 62 engages with the pin 63 on the chain, thereby installing the chain plate onto the pin of the chain.

[0054] Once the chain plate is installed, reverse the tightening bolt. The bolt will retract, and the pressure block will move away from the chain along the slide. Under the action of the spring inside the cavity, the positioning pin will switch from a retracted state to an extended state. When the positioning pin is completely disengaged from the chain, the chain can be removed.

[0055] In summary, the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A chain connection press fitting, characterized in that: At least: A base (1), the base protruding outward to form a fixing portion (11), one side of the fixing portion being provided with a plurality of positioning grooves (12) extending downward from the top end and arranged in parallel at intervals along a straight line direction; A press-fitting mechanism (2), the press-fitting mechanism at least comprising a press seat (21) close to one side of the positioning groove and movably connected to the base along a direction perpendicular to the arrangement of the positioning grooves, a positioning pin shaft (22) corresponding to two adjacent positioning grooves one by one, and a pressing head (23) sleeved on the positioning pin shaft and fixedly connected to one side of the press seat close to the positioning groove, the free end of the positioning pin shaft having an extended state and a retracted state in the pressing head and being configured to be movable between the extended state and the retracted state, the other end of the positioning pin shaft being installed in the press seat and an elastic element (24) being provided between the end surface of the positioning pin shaft and the base; A chain fixing seat (3), the chain fixing seat being located between the fixing portion and the pressing mechanism and being fixedly connected to the base, the top of the chain fixing seat being provided with a plurality of grooves (31) recessed downwards and matching with the positioning grooves at intervals along the arrangement direction of the positioning grooves, and convex portions (32) being formed between the grooves; A driving assembly (4) drives the pressing mechanism to approach the chain fixing seat and drives the positioning pin shaft to switch between an extended state and a retracted state.

2. A chain connection press fitting according to claim 1, characterized in that: The base protrudes outwards at a position close to the positioning groove to form a mounting portion (13), a guide groove (14) is formed between the mounting portion and the fixing portion, the chain fixing seat (3) is installed in the guide groove, the mounting portion is provided with a mounting cavity (15) connected to the guide groove, and the press-fitting mechanism is installed in the mounting cavity.

3. A chain connection press fitting according to claim 2, characterized in that: The groove is a U-shaped groove with a bottom arc surface (311), the groove comprises a first groove (312) and a second groove (313), the arc surface and the positioning pin are on the same axis, and a step (33) is provided on the side of the chain fixing seat away from the installation cavity.

4. A chain connection press fitting according to claim 3, characterized in that: The pressure seat comprises a pressure block (211), a mounting hole 1 (2111) is arranged at the center of the pressure block, mounting holes 2 (2112) penetrating the pressure block are symmetrically arranged on both sides of the mounting hole 1 and correspond one-to-one with the first groove and the second groove, and the pressure head (23) is embedded in the mounting hole 2 and fixedly connected to the pressure block.

5. A chain connection press fitting according to claim 4, characterized in that: The pressure head (23) comprises a connecting section (231) adapted to the second mounting hole and a guiding section (232) formed by axial stretching of the connecting section, wherein the outer diameter of the guiding section (232) is larger than the outer diameter of the connecting section, and the pressure head is provided with a through hole (233) along the axial direction, and the positioning pin shaft (22) comprises a working section (221) with an outer diameter adapted to the through hole and a guiding section (222) formed by axial stretching of the working section, wherein the outer diameter of the guiding section (22) is larger than the outer diameter of the working section.

6. A chain connection press fitting according to claim 5, characterized in that: The outer walls of both sides of the pressing block (211) extend outward to form symmetrically arranged sliding parts (2113), and the inner walls of both sides of the installation cavity are symmetrically provided with slideways (151) adapted to the sliding parts along a direction perpendicular to the arrangement of the grooves.

7. A chain connection press fitting according to claim 6, characterized in that: Positions of the inner wall surfaces on both sides of the installation cavity away from the guide groove (14) are provided with clearance grooves (152) which are connected to the slideway (151) and matched with the sliding part (2113).

8. A chain connection press fitting according to claim 7, characterized in that: The pressure seat also includes an elastic element fixing seat (212), the elastic element fixing seat includes a fixing seat body (2121), a cavity (2122) with an open bottom is provided in the fixing seat body, the bottom outer wall of the cavity extends outward to form a connecting portion (2123), and the elastic element fixing seat is fixedly connected to the pressure block via the connecting portion.

9. A chain connection press fitting according to claim 8, characterized in that: The elastic element (24) is installed in the cavity (2122), the opening of the cavity is matched with the outer diameter of the second guide section (222) of the positioning pin shaft (22), the working section (221) of the positioning pin shaft passes through the through hole and the second guide section (222) extends into the cavity and abuts against the elastic element.

10. A chain connection press fitting according to any one of claims 5 to 9, characterized in that: The driving assembly comprises a clamping bolt (41), an end of the clamping bolt away from the nut is provided with a mounting hole three (411), a wall surface of the mounting cavity away from the guide groove is provided with a threaded hole (153) adapted to the clamping bolt, and an end of the clamping bolt away from the nut passes through the threaded hole and is fixedly connected to the mounting hole one of the pressure block (211) through the mounting hole three (411).

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