Assembling device for connection of reinforcing steel bar and connecting sleeve
The assembly device addresses the complexity and unreliability of existing steel bar connections by using a push-up and reducing sleeve arrangement to securely deform the connecting sleeve around the steel bars, ensuring stable and efficient on-site connections.
Patent Information
- Application Number
- CN202411660263.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2024-09-14
- Filing Date
- 2024-11-20
- Publication Date
- 2025-01-03
AI Technical Summary
Existing steel bar connection methods using metal sleeves are complicated, difficult to maintain coaxiality, and result in unreliable connections due to foreign matter entry and misalignment during on-site construction, leading to inefficient operations.
An assembly device with a first and second seat body that linearly displace, featuring a push-up sleeve and reducing sleeve with a tapered cavity, allowing for concentric arrangement and radial deformation of the connecting sleeve to securely wrap the steel bars, ensuring stable connections.
The device provides a simple, reliable, and stable connection process that ensures high yield rates and easy operation, maintaining connection quality despite on-site challenges.
Smart Images
Figure CN119244012A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of engineering construction, and in particular relates to an assembly device for connecting a steel bar with a connecting sleeve. Background Art
[0002] The method of mechanically connecting two steel bars with metal sleeves has been widely used due to its advantages such as flexible operation in a small space, fast connection speed, and convenient maintenance and inspection of the connection nodes.
[0003] Prior art such as Chinese patent CN113898126A discloses a steel bar axial cold extrusion mechanical connection sleeve and a special tool. The mechanical connection sleeve includes an inner sleeve, an outer sleeve and an extrusion sleeve. The inner sleeve is a multi-petal structure. The outer sleeve is sleeved on the outer periphery of the inner sleeve and one end of the outer sleeve has a flange with the outer sleeve. The inner diameter of the extrusion sleeve is smaller than the outer diameter of the outer sleeve. During the connection process, the outer sleeve flange abuts against the fixed arm of the special tool. The extrusion sleeve is displaced from the other end of the outer sleeve close to the outer sleeve flange under the action of the sliding head of the special tool. When the outer sleeve is displaced, the outer sleeve is extruded. The outer sleeve contracts radially and extrudes the inner sleeve, thereby connecting the two steel bars to the entire sleeve assembly as a whole. This connecting sleeve has a multi-layer nested structure. The installation of the inner sleeve, outer sleeve and extrusion sleeve is relatively complicated, and the installation coaxiality requirements of each layer of sleeves are also high. During on-site construction, foreign matter enters the gap between the sleeves or the coaxial posture of the sleeves cannot be well maintained, which will cause the displacement of the extrusion sleeve to be obstructed and the effective connection between the sleeve assembly and the steel bar cannot be achieved. The on-site construction is difficult and inefficient.
[0004] Chinese patent CN218406070U discloses an axial steel bar connector and an extrusion tool. The axial steel bar connector includes a straight cylindrical connecting sleeve, and the steel bars are inserted into the central connecting hole of the connecting sleeve from the two axial ends of the connecting sleeve; the extrusion tool includes an upper jaw and a lower jaw, and the upper jaw and the lower jaw are respectively detachably connected with a locking sleeve, and the inner hole of the locking sleeve is conical. A limit block is required to be provided at one end of the upper jaw and the lower jaw away from the extrusion channel. The two limit blocks need to be symmetrically arranged about the center of the extrusion channel to ensure that the connecting sleeve becomes thicker and reinforced at the center position after extrusion, thereby ensuring the stability of the connection between the two steel bars; during the extrusion operation, the hydraulic cylinder drives the upper jaw to move toward the lower jaw, driving one end of the connecting sleeve to be pushed into the lower jaw, and the other end is also continuously squeezed by the upper jaw, and when one end reaches the limit block, it is resisted, limiting its movement to the resisted end, and then the upper jaw contacts the lower jaw to complete the circumferential extrusion of the connecting sleeve. The connecting sleeve extruded by this scheme is in the shape of an axial tube with a large outer diameter in the middle and small outer diameters at both ends. However, it is difficult to ensure that the thickened reinforcement section is located in the middle of the connecting sleeve during on-site construction. The operating personnel cannot observe the connection position of the two steel bars from the outside of the connecting sleeve, and it is also impossible to ensure that the thickened reinforcement section of the connecting sleeve is located in the connection gap between the two steel bars. The quality of the steel bar connection cannot be effectively guaranteed. Summary of the invention
[0005] The purpose of the present invention is to provide an assembly device for connecting a steel bar and a connecting sleeve, which is easy to operate and has stable and reliable connection quality.
[0006] To achieve the above objectives, the technical solution adopted by the present invention is: an assembly device for connecting a steel bar and a connecting sleeve, comprising a first seat body and a second seat body that are linearly displaced toward and away from each other, the first seat body arm on the first seat body has a push-up sleeve extending toward the side where the second seat body is located, the second seat body arm of the second seat body is provided with a reducing sleeve, the push-up sleeve and the reducing sleeve are concentrically arranged and the central axes of the two are parallel to the linear displacement direction of the first seat body and the second seat body, the inner tube cavity of the reducing sleeve comprises a tapered tube cavity arranged adjacent to the first seat body, the large diameter end of the tapered tube cavity is arranged adjacent to the first seat body, and the minimum inner diameter of the tapered tube cavity is greater than or equal to the outer diameter of the push-up sleeve.
[0007] Compared with the prior art, the present invention has the following technical effects: when in use, the abutting sleeve abuts against the connecting sleeve to limit its axial displacement, and then drives the reducing sleeve to move toward the abutting sleeve, and the conical tube cavity of the reducing sleeve can exert a radial inward force on the connecting sleeve to make it shrink and deform to wrap the steel bar, thereby realizing a reliable connection of the steel bar. The assembly device has a simple structure and is easy to operate. While ensuring the stability and reliability of the assembly device itself, it can also ensure the yield rate of the steel bar connection operation at the construction site. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] The following is a brief description of the contents and symbols in the drawings of this specification:
[0009] Figure 1 is a three-dimensional schematic diagram of an embodiment;
[0010] Figure 2 It is a three-dimensional schematic diagram of the embodiment without the top sleeve and the diameter-reducing sleeve;
[0011] Figure 3 It is a half-cut three-dimensional schematic diagram of the embodiment with the top sleeve and the diameter-reducing sleeve hidden;
[0012] Figure 4 is a half-cutaway perspective schematic diagram of the first seat body and the second seat body in the initial position in the use state of the embodiment;
[0013] Figure 5 is a half-cut three-dimensional schematic diagram of the first seat body and the second seat body in the end position in the use state of the embodiment;
[0014] Figure 6 , 7 It is a three-dimensional schematic diagram of the top cover;
[0015] Figure 8 It is a semi-cut three-dimensional schematic diagram of the push sleeve in a separated state;
[0016] Fig. 9 , 10 It is a three-dimensional schematic diagram of the reducing sleeve;
[0017] Fig.11 It is a semi-cut three-dimensional schematic diagram of the reduction sleeve in a separated state. DETAILED DESCRIPTION
[0018] The specific implementation of the present invention is further described in detail below through description of embodiments in conjunction with the accompanying drawings.
[0019] An assembly device for connecting a steel bar and a connecting sleeve comprises a first seat body 10 and a second seat body 20 which are linearly displaced toward and away from each other, a first seat body arm portion 11 on the first seat body 10 having a butt sleeve 30 extending toward the side where the second seat body 20 is located, a second seat body arm portion 21 of the second seat body 20 is provided with a reducing sleeve 40, the butt sleeve 30 and the reducing sleeve 40 are concentrically arranged and their axis are parallel to the linear displacement direction of the first seat body 10 and the second seat body 20, an inner tube cavity of the reducing sleeve 40 comprises a tapered tube cavity 41 arranged adjacent to the first seat body 10, a large diameter end of the tapered tube cavity 41 is arranged adjacent to the first seat body 10, and a minimum inner diameter of the tapered tube cavity 41 is greater than or equal to an outer diameter of the butt sleeve 30.
[0020] In this embodiment, the power source of the first seat body 10 and the second seat body 20 is a hydraulic cylinder. The first seat body 10 and the cylinder body form a synchronous displacement, and the second seat body 20 and the piston cylinder form a synchronous displacement. The relative displacement direction of the piston cylinder and the cylinder body of the hydraulic cylinder is the linear displacement direction of the first seat body 10 and the second seat body 20. In other embodiments, other commonly used power equipment can also be used as a power source. When this embodiment is used, as shown in the attached Figure 4 , 5As shown, two steel bars B are respectively inserted into the tube cavities of the top sleeve 30 and the diameter-reducing sleeve 40, and the connecting ends of the two steel bars B are located between the top sleeve 30 and the diameter-reducing sleeve 40 and inserted into the tube cavity of the connecting sleeve A. On this basis, the first seat body 10 and the second seat body 20 are displaced toward each other, and the top sleeve 30 and the diameter-reducing sleeve 40 respectively arranged on the two seats are displaced toward each other, and the distance between them is reduced. After one end of the connecting sleeve A is abutted against the top sleeve 30, the diameter-reducing sleeve 40 covers the other end of the connecting sleeve A. As the distance between the top sleeve 30 and the diameter-reducing sleeve 40 is reduced, the connecting sleeve A inserted through the diameter-reducing sleeve 40 is deformed by the radial force applied to it by the conical tube cavity 41 and tightly wraps the steel bars B, thereby realizing a fixed connection between the steel bars B and the connecting sleeve A. In the present embodiment, the second seat body 20 provided with the reducing sleeve 40 is fixedly connected to the piston cylinder, so that during the connection operation, the positions of the push sleeve 30 and the connecting sleeve A are fixed, and the reducing sleeve 40 is displaced toward the push sleeve 30 along the radial direction of the connecting sleeve A to realize the connection between the steel bar B and the connecting sleeve A. In other embodiments, the reducing sleeve 40 can also be kept fixed, and the push sleeve 30 is driven to push the connecting sleeve A to the side where the reducing sleeve 40 is located to complete the steel bar sleeve connection operation.
[0021] If the entire connecting sleeve A is to be extruded, the small diameter end of the tapered tube cavity 41 of the reducing sleeve 40 should be able to move from one end of the connecting sleeve A to the other end and separate from the connecting sleeve A. However, the abutting sleeve 30 abuts against the displacement terminal of the reducing sleeve 40. Therefore, under the premise that the outer shape of the abutting sleeve 30 is smaller than the inner diameter of the small diameter section of the tapered tube cavity 41, the axial dimension of the sleeve body of the abutting sleeve 30 exposed outside the first seat arm 11 should also be larger than the axial dimension of the tapered tube cavity 41. In this way, as shown in the attached Figure 5 As shown, after the processing is completed, the connecting sleeve A is located outside the small diameter end of the tapered tube cavity 41 of the reducing sleeve 40, and the workpiece after the connection operation is completed can be separated from the assembly device by axially pulling out the reducing sleeve 40.
[0022] When the first seat body 10 and the second seat body 20 are displaced toward each other, the top sleeve 30 and the diameter reducing sleeve 40 first need to bear the same axial force. On this basis, the diameter reducing sleeve 40 also needs to squeeze the sleeve A to be connected to shrink and deform it, so it needs to have greater strength. In order to facilitate production and processing, the top sleeve 30 and the diameter reducing sleeve 40 in this embodiment are made of the same material. In order to ensure that the sleeve strength of the diameter reducing sleeve 40 meets the requirements, the diameter reducing sleeve 40 should have a greater wall thickness, especially the wall thickness of the tapered tube cavity 41 of the diameter reducing sleeve should be greater than the wall thickness of the top sleeve 30. Similarly, the second seat body arm 21 should also provide a stronger radial limiting effect on the diameter reducing sleeve 40. Therefore, when the top sleeve 30 and the diameter reducing sleeve 40 are concentrically arranged, the overhanging end face of the second seat body arm 21 in this embodiment is located outside the first seat body arm 11.
[0023] In order to meet the connection requirements of steel bars B with different outer diameters, in this embodiment, the abutting sleeve 30 is detachably matched with the first seat body arm portion 11, and the reducing sleeve 40 is detachably matched with the second seat body arm portion 21.
[0024] Specifically, the end of the push sleeve 30 away from the second seat body 20 has an external push sleeve convex ring 31, and the push sleeve convex ring 31 and the first seat body arm 11 form a detachable insertion fit. When the push sleeve convex ring 31 is inserted into the first seat body arm 11, it forms a limit fit with the first seat body arm 11 in the seat body linear displacement direction. In this embodiment, the installation and removal direction of the push sleeve convex ring 31 on the first seat body arm 11 is perpendicular to the seat body linear displacement direction. Figure 2 , 3 As shown, the first seat arm 11 is provided with a limiting groove 112, the groove depth direction and the groove opening of the limiting groove 112 are perpendicular to the linear displacement direction of the seat body, and the limiting groove 112 includes an external guide section 112a and a built-in positioning section 112b, the guide section 112a is a straight groove, the positioning section 112b is an arc groove, and the groove length of the limiting groove 112 composed of the guide section 112a and the positioning section 112b is U-shaped as a whole. Figure 6 , 7 As shown in Figures 8 and 9, the cross-sectional shape of the top sleeve convex ring 31 is consistent with the cross-sectional shape of the groove cavity of the limiting groove 112. The outer peripheral surface of the top sleeve convex ring 31 includes two parallel and oppositely arranged guide surfaces 32. The guide surfaces 32 are displaced to insert into the limiting groove 112 or withdraw from the limiting groove 112 under the guidance of the guide section 112a of the limiting groove 112. The groove depth of the positioning section 112b is less than or equal to the protruding dimension of the top sleeve convex ring 31. In this way, when the inner end of the top sleeve convex ring 31 is in contact with the groove bottom of the positioning section 112b, the groove wall of the limiting groove 112 will not block the middle pipe hole of the top sleeve 30.
[0025] In a preferred embodiment, the limiting groove 112 is arranged adjacent to the second seat body 20. Figure 4 As shown, the thickness of the arm body on the side of the limiting groove 112 away from the second seat body 20 is greater than the thickness of the arm body on the side adjacent to the second seat body 20. Obviously, the greater thickness of the arm body away from the second seat body 20 can provide reliable axial support for the top sleeve 30, so that a smaller-sized first seat body arm 11 can meet the usage requirements.
[0026] The assembly device shown in the accompanying drawings is arranged vertically, and the upper push sleeve 30 is inserted and matched with the limiting groove 112 whose opening is perpendicular to the linear displacement direction of the seat body, which can effectively prevent the push sleeve 30 from falling, thereby maintaining its installation posture. In another embodiment, if the assembly device is operated horizontally or horizontally, the push sleeve 30 can also be inserted into the first seat body arm 11 along the axial direction of the sleeve body. However, since the axial dimension of the push sleeve 30 is relatively large, in order to prevent the push sleeve 30 from being deflected during operation, it is necessary to increase the axial insertion depth of the push sleeve 30 in the first seat body arm 11, increase the volume of the first seat body arm 11, make the first seat body 10 or the assembly device more bulky, and reduce the portability of the assembly device.
[0027] In this embodiment, the butt collar 31 and the first seat arm 11 have a mating surface perpendicular to the linear displacement direction of the seat. To prevent the first seat arm 11 from twisting, the mating surface is symmetrically arranged relative to the center plane of the first seat arm 11 in the width direction. This makes the first seat arm 11 evenly stressed in the width direction of the first seat arm 11, thereby avoiding uneven stress on both sides of the overall U-shaped mating surface, thereby ensuring the stability and reliability of the assembly device during operation.
[0028] As attached Figure 4 , 5 As shown, the displacement of the reducing sleeve 40 from bottom to top drives the connecting sleeve A to deform, and there may be a deformed convex portion on the upper end surface of the connecting sleeve A. In this embodiment, in order to ensure that the reducing sleeve 40 can be smoothly guided to the outer periphery of the abutting sleeve 30, the end surface of the abutting sleeve 30 adjacent to the second seat body 20 is transitionally connected to the outer peripheral surface of the cylindrical sleeve body through a conical surface with a small outer surface and a large inner surface, wherein the side adjacent to the second seat body 20 is the outer side, and the side away from the second seat body 20 is the inner side, that is, the attached Figure 8 In actual application, a portion for accommodating the deformed convex position of the sleeve A to be connected can be formed between the conical surface and the adjacent end surface of the connecting sleeve A, so as to prevent the reduction sleeve 40 from being stuck at this position and making it difficult to separate from the connecting sleeve A.
[0029] Specifically, the reducing sleeve 40 and the second seat arm 21 form a detachable insertion fit in the seat body linear displacement direction. When the reducing sleeve 40 is inserted into the second seat arm 21, the displacement of the reducing sleeve 40 away from the first seat 10 and perpendicular to the seat body linear displacement direction is limited by the second seat arm 21. Figure 2 , 3As shown in Figures 4 and 5, the wall surface of the second seat arm 21 adjacent to the first seat 10 is recessed inward to form a concave cavity 212, and the cavity wall of the concave cavity 212 matches the outer contour of the diameter reducing sleeve 40 to ensure the reliable positioning of the diameter reducing sleeve 40 in the axial direction of its sleeve body when it is installed. The recessed depth of the concave cavity 212 is less than or equal to the axial dimension of the diameter reducing sleeve 40. In this embodiment, the recessed depth of the concave cavity 212 is equal to the axial dimension of the diameter reducing sleeve 40, that is, the upper surface of the diameter reducing sleeve 40 adjacent to the first seat 10 is flush with the upper surface of the second seat arm 21 in the installed state. The concave cavity 212 has a sinking platform 213 with the table surface facing the first seat 10, and the sinking platform 213 abuts against the bottom surface of the diameter reducing sleeve 40 to limit the displacement of the diameter reducing sleeve 40 in the recessed direction of the concave cavity 212. The cavity wall of the concave cavity 212 adjacent to the second seat arm 21 is a limiting wall 214 with the wall surface facing the connecting end of the second seat arm 21 . The limiting wall 214 abuts against the outer wall surface of the reducing sleeve 40 to limit the displacement of the reducing sleeve 40 away from the connecting end of the second seat arm 21 .
[0030] In this embodiment, the insertion direction of the push sleeve 30 on the first seat arm 11 is consistent with the extension direction of the arm 11 of the first seat arm, and the insertion direction of the reducing sleeve 40 on the second seat arm 21 is consistent with the linear displacement direction of the second seat 20. In other words, the insertion directions of the push sleeve 30 and the reducing sleeve 40 are perpendicular to each other. The different insertion directions of the two can effectively avoid the safety accidents caused by the imbalance of force during the extrusion operation of the connecting sleeve, which may cause the push sleeve 30 and the reducing sleeve 40, that is, the internal penetrating components thereof to fall out of the seat, thereby ensuring construction safety.
[0031] To further enhance the convenience of on-site construction, in this embodiment, a first U-shaped notch 111 is provided at the arm end of the first seat arm 11, and a second U-shaped notch 211 is provided at the arm end of the second seat arm 21. The openings of the first U-shaped notch 111 and the second U-shaped notch 211 point in the same direction, so that the steel bars B can be inserted through the notches of the first U-shaped notch 111 and the second U-shaped notch 211, respectively, to simplify the operation.
[0032] The opening direction of the first U-shaped notch 111 is perpendicular to the linear displacement direction of the seat body, and the opening direction of the first U-shaped notch 111 is consistent with the arm length direction of the first seat body arm 11. Figure 2 As shown, the limiting groove 112 is provided at the inner wall of the first U-shaped notch 111, the groove depth direction of the limiting groove 112 is consistent with the notch extension direction of the first U-shaped notch 111, and the notch of the limiting groove 112 extends to the edge end surface of the first U-shaped notch 111. Figure 1 , 2 As shown, the abutting sleeve 30 can be inserted from the edge end surface of the first U-shaped notch 111 .
[0033] The opening of the second U-shaped notch 211 is perpendicular to the linear displacement direction of the seat body and is consistent with the arm length direction of the second seat body arm 21. Figure 2 As shown, the surface of the sinking platform 213 is U-shaped as a whole, and the inner edge of the surface of the sinking platform 213 is closed, so that the surface area of the sinking platform 213 adjacent to the arm end of the second seat body arm 21 can be increased, thereby increasing the matching area between the reducing sleeve 40 adjacent to the arm end of the second seat body arm 21 and the sinking platform 213, compensating for the reduction in the matching area caused by the sleeve body of the reducing sleeve 40 located in the second U-shaped notch 211 not being supported, and ensuring the effective transmission of force between the reducing sleeve 40 and the second seat body arm 21. The end edge of the sinking platform 213 intersects with the limiting wall 214, and the limiting wall 214 is arranged at a distance from the end face of the mouth of the second U-shaped notch 211, and the spacing between the limiting wall 214 and the end face of the mouth of the second U-shaped notch 211 constitutes the wall thickness between the outer end face of the concave cavity 212 and the outer end face of the second seat body arm 21. The sleeve body of the reducing sleeve 40 passes through the gap between the two limiting walls 214 and extends to the edge end surface of the second U-shaped notch 211. The wall surface of the limiting wall 214 is parallel to the arm end surface of the second U-shaped notch 211. The operator can conveniently install and remove the reducing sleeve 40 by holding the protruding portion.
[0034] The top sleeve 30 and the diameter reducing sleeve 40 in this embodiment are construction parts, which do not need to be fixedly connected to the connecting sleeve A or the steel bar B, and need to be removed after the extrusion operation of the connecting sleeve A is completed. In order to facilitate the installation and separation of the top sleeve 30 and the diameter reducing sleeve 40 from the workpiece to be processed, the top sleeve 30 and the diameter reducing sleeve 40 in this embodiment are of a petal structure.
[0035] Specifically, the top sleeve 30 is composed of a top inner half body 30a and a top outer half body 30b. The top inner half body 30a is cut along the tube axis through the tube core plane, so that the top inner half body 30a can rotate in the limiting groove 112, and can reliably support and adjust the installation position of the steel bar B during assembly. The half-body dividing surface of the top inner half body 30a and the top outer half body 30b is perpendicular to the guide surface 32, so that the axial force of the two halves is relatively uniform. Similarly, the diameter reduction sleeve 40 is composed of a diameter reduction inner half body 40a and a diameter reduction outer half body 40b. The half-body dividing surface of the diameter reduction inner half body 40a and the diameter reduction outer half body 40b passes through the tube core and is perpendicular to the arm length direction of the second seat arm 21.
[0036] The guide surface 32 of the push sleeve 30 is arranged at the push sleeve convex ring 31 of the push outer half body 30b, so that the push outer half body 30b can limit the rotation of the push inner half body 30a after being inserted and installed in the limiting groove 112, thereby realizing the positioning of the steel bar B inserted therein. In order to prevent the push outer half body 30b from escaping from the limiting groove 112 during operation, the push outer half body 30b should be tightly matched with the limiting groove 112. The protruding dimension of the butt collar 31 of the butt outer half 30b in the extending direction of the guide surface 32 is greater than the protruding dimension of the butt collar 31 of the butt inner half 30a, so that the protruding dimension of the butt collar 31 on the butt outer half 30b in the extending direction of the guide surface 32 can be increased, thereby increasing the matching area between the butt outer half 30a and the first seat arm 11, compensating for the fact that part of the butt collar 31 of the butt outer half 30b is located in the first U-shaped notch 111, resulting in a reduction in the matching surface of the two components and causing force concentration, thereby ensuring the reliability of force transmission and the stability of the structure.
[0037] The reducing sleeve 40 is different from the abutting sleeve 30. The reducing inner half 40a and the reducing outer half 40b need to be enclosed around the outer periphery of the steel bar B to be connected between the first seat arm 11 and the second seat arm 21, and then the two halves are inserted into the concave cavity 212 while maintaining their posture. The small diameter end of the tapered tube cavity 41 in the reducing sleeve 40 extends axially away from the first seat 10 to form a straight tube cavity 42. When in use, the straight tube cavity 42 can further reshape the deformed connecting sleeve A and maintain its deformed state.
Claims
1. An assembly device for connecting a steel bar to a connecting sleeve, characterized in that: The invention comprises a first seat body (10) and a second seat body (20) which are arranged to move toward and away from each other in a linear manner. The first seat body arm portion (11) on the first seat body (10) has a butt sleeve (30) extending toward the side where the second seat body (20) is located. The second seat body arm portion (21) of the second seat body (20) is provided with a reducing sleeve (40). The butt sleeve (30) and the reducing sleeve (40) are arranged concentrically and their core axes are parallel to the linear displacement direction of the first seat body (10) and the second seat body (20). The inner tube cavity of the reducing sleeve (40) comprises a conical tube cavity (41) arranged adjacent to the first seat body (10). The large diameter end of the conical tube cavity (41) is arranged adjacent to the first seat body (10). The minimum inner diameter of the conical tube cavity (41) is greater than or equal to the outer diameter of the butt sleeve (30).
2. The assembly device according to claim 1, characterized in that: The axial dimension of the sleeve body of the abutting sleeve (30) exposed and arranged outside the first seat body arm portion (11) is greater than the axial dimension of the conical tube cavity (41); The wall thickness of the abutting sleeve (30) is smaller than the wall thickness of the conical tube cavity (41) of the reducing sleeve, and the cantilevered arm end of the second seat body arm portion (21) is located outside the cantilevered arm end of the first seat body arm portion (11).
3. The assembly device according to claim 1, characterized in that: The end of the push sleeve (30) away from the second seat body (20) is provided with an external push sleeve convex ring (31), and the push sleeve convex ring (31) and the first seat body arm portion (11) form a detachable insertion fit, and when the push sleeve convex ring (31) is inserted into the first seat body arm portion (11), it forms a limit fit with the first seat body arm portion (11) in the seat body linear displacement direction.
4. The assembly device according to claim 3, characterized in that: The first seat arm (11) is provided with a limiting groove (112), the groove depth direction and the groove opening direction of the limiting groove (112) are perpendicular to the linear displacement direction of the seat, the cross-sectional shape of the abutting sleeve convex ring (31) is consistent with the cross-sectional shape of the groove cavity of the limiting groove (112), and the limiting groove (112) includes an external guide section (112a) and an internal positioning section (112b), the guide section (112a) is a straight groove, and the positioning section (112b) is an arc-shaped groove. The limiting groove (112) formed by the groove and the guide section (112a) and the positioning section (112b) is generally U-shaped; the outer peripheral surface of the top sleeve convex ring (31) includes two parallel and oppositely arranged guide surfaces (32); the guide surfaces (32) are displaced and inserted into the limiting groove (112) or withdrawn from the limiting groove (112) under the guidance of the guide section (112a); the groove depth of the positioning section (112b) is less than or equal to the protruding dimension of the top sleeve convex ring (31).
5. The assembly device according to claim 4, characterized in that: A first U-shaped notch (111) is provided at the arm end of the first seat body arm (11), the opening of the first U-shaped notch (111) is directed perpendicular to the seat body linear displacement direction, and the opening of the first U-shaped notch (111) is directed in the same direction as the arm length of the first seat body arm (11); a limiting groove (112) is provided at the inner wall of the notch of the first U-shaped notch (111), the groove depth direction of the limiting groove (112) is consistent with the notch extension direction of the first U-shaped notch (111), and the notch of the limiting groove (112) extends to the end surface of the mouth edge of the first U-shaped notch (111); The push sleeve (30) is composed of a push inner half body (30a) and a push outer half body (30b). The push inner half body (30a) is obtained by cutting the tubular component along the tube axis direction through the tube core plane. The half body dividing surfaces of the push inner half body (30a) and the push outer half body (30b) are perpendicular to the guide surface (32). The guide surface (32) is arranged at the push sleeve convex ring (31) of the push outer half body (30b). The protruding dimension of the push sleeve convex ring (31) of the push outer half body (30b) in the extension direction of the guide surface (32) is greater than the protruding dimension of the push sleeve convex ring (31) of the push inner half body (30a).
6. The assembly device according to claim 4, characterized in that: The limiting groove (112) is arranged adjacent to the second seat body (20); The butting sleeve convex ring (31) and the first seat body arm portion (11) have a matching surface perpendicular to the seat body linear displacement direction, and the matching surface is symmetrically arranged relative to the center plane of the first seat body arm portion (11) in the width direction; The end surface of the abutting sleeve (30) adjacent to the second seat body (20) is transitionally connected to the outer peripheral surface of the cylindrical sleeve body through a conical surface with a smaller outer surface and a larger inner surface.
7. The assembly device according to any one of claims 1 to 6, characterized in that: The reducing sleeve (40) and the second seat body arm portion (21) form a detachable plug-in fit in the seat body linear displacement direction. When the reducing sleeve (40) is inserted into the second seat body arm portion (21), the displacement of the reducing sleeve (40) away from the first seat body (10) and in a direction perpendicular to the seat body linear displacement direction is limited by the second seat body arm portion (21).
8. The assembly device according to claim 7, characterized in that: The wall surface of the second seat body arm (21) adjacent to the first seat body (10) is inwardly recessed to form a concave cavity (212); the cavity wall of the concave cavity (212) matches the outer contour of the diameter reducing sleeve (40); the recessed depth of the concave cavity (212) is less than or equal to the axial dimension of the diameter reducing sleeve (40); the concave cavity (212) has a sinking platform (213) whose table surface faces the first seat body (10); the sinking platform (213) limits the displacement of the diameter reducing sleeve (40) in the recessed direction of the concave cavity (212); the cavity wall of the concave cavity (212) adjacent to the second seat body arm (21) is a limiting wall (214) whose wall surface faces the connecting end of the second seat body arm (21); the limiting wall (214) limits the displacement of the diameter reducing sleeve (40) away from the connecting end of the second seat body arm (21).
9. The assembly device according to claim 8, characterized in that: A second U-shaped notch (211) is provided at the arm end of the second seat body arm (21); the opening of the second U-shaped notch (211) is perpendicular to the seat body linear displacement direction and consistent with the arm length direction of the second seat body arm (21); the openings of the first U-shaped notch (111) and the second U-shaped notch (211) are consistent; The table top of the sinking platform (213) is in a U-shape as a whole, and the inner edge of the table top of the sinking platform (213) is in a closed shape; The end edge of the sink (213) intersects with the limiting wall (214), the limiting wall (214) and the end face of the mouth edge of the second U-shaped notch (211) are arranged at intervals, the sleeve body of the reducing sleeve (40) passes through the notch between the two limiting walls (214) and extends to the end face of the mouth edge of the second U-shaped notch (211), and the wall surface of the limiting wall (214) is parallel to the end face of the arm end of the second U-shaped notch (211).
10. The assembly device according to claim 9, characterized in that: The small diameter end of the tapered tube cavity (41) in the reducing sleeve (40) axially extends away from the first seat body (10) to form a straight tube cavity (42); the reducing sleeve (40) is composed of a reducing inner half body (40a) and a reducing outer half body (40b); the dividing surfaces of the reducing inner half body (40a) and the reducing outer half body (40b) pass through their tube cores and are perpendicular to the arm length direction of the second seat body arm portion (21).