A device and method for cold extrusion riveting of reinforcing steel to prevent eccentric loading

Abstract

The application discloses a kind of steel bar's anti-bias load cold extrusion riveting device and method, it is related to steel bar connecting technical field, it can solve the problem of existing riveting device bias load influence service life.This embodiment of a kind of steel bar's anti-bias load cold extrusion riveting device, including guide sleeve and at least two drivers, and thrust transmission seat and base assembly;The driving rod of two or more drivers is evenly arranged in parallel, and the driving rod is connected on the thrust transmission seat;The peripheral wall of guide sleeve is provided with working window;Thrust transmission seat is slidably arranged in guide sleeve, and thrust transmission seat has push part;Base assembly is fixedly connected to the bottom of guide sleeve;It further includes riveting assembly, and riveting assembly includes sleeve compression ring main body, sleeve ring main body and steel sleeve;When riveting, sleeve compression ring main body and sleeve ring main body are sleeved on two steel bar main bodies, steel sleeve is simultaneously sleeved on two steel bar main bodies, and sleeve compression ring main body is installed on push part, and sleeve ring main body is installed on base assembly.

Description

Technical Field

[0001] This invention relates to the field of rebar connection technology, specifically to a rebar anti-eccentric load cold extrusion riveting device and method. Background Technology

[0002] As a core technology in reinforced concrete structures and large steel structure projects, rebar connection is widely used in major engineering fields such as bridges, high-rise buildings, and large industrial infrastructure. The quality of its connection directly affects the overall stability and durability of the structure.

[0003] Currently, the mainstream rebar connection methods mainly include three categories: lap splicing, welding, and mechanical connection. Each method has significant technical limitations: lap splicing is simple to construct, efficient, and does not damage the rebar itself, but it results in serious waste of rebar material and deformation at the connection point; welding, while saving rebar usage, has quality risks such as damage to the rebar substrate, insufficient joint strength, and susceptibility to rust and weld breakage, and it also consumes a lot of energy; mechanical connection, as a mainstream alternative developed in recent years, includes forms such as tapered sleeve axial compression connection, threaded connection, and grouting sleeve connection. Among them, tapered sleeve axial compression connection has problems such as numerous structural components, high cost, and complex locking plate processing technology; threaded connection has poor on-site operability, joint performance is greatly affected by human factors, and lacks stability; grouting sleeve connection faces bottlenecks such as high cost, difficult on-site construction, and difficulty in joint installation quality inspection.

[0004] Existing hydraulic riveting tools have revealed key technical defects in the practical application of tapered sleeve axial extrusion connections: During the riveting process, the thrust exerted on the reinforcing bar when it is extruded is not aligned with the central axis of the reinforcing bar itself. The reinforcing bar is eccentric relative to the drive mechanism. Therefore, when the reinforcing bar is subjected to thrust and then extruded for connection, the drive mechanism will be subjected to the reverse force of eccentric loads such as deflection force and lateral force. These forces directly cause deformation of the cylinder and piston rod, which in turn leads to seal failure. After riveting a certain number of reinforcing bars, seal failure will cause leakage in the hydraulic system, preventing the hydraulic cylinder from reaching the rated working pressure. Ultimately, this will lead to the interruption of the riveting operation, requiring frequent replacement of seals or even the entire cylinder. This not only seriously affects the construction quality and efficiency of reinforcing bar riveting, but also prolongs the construction cycle and increases project costs.

[0005] Based on the above background, the inventors have proposed a device and method for preventing eccentric loading and cold extrusion riveting of reinforcing bars, which solves at least one of the above problems, and hereby submit this application. Summary of the Invention

[0006] The purpose of this application is to provide a cold extrusion riveting device and method for preventing eccentric load on reinforcing bars, which solves the problem that cold extrusion riveting of reinforcing bars in the prior art is easily affected by eccentric load, resulting in a short service life of the riveting device.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following solution: On the one hand, this application provides a cold extrusion riveting device for preventing eccentric loading of reinforcing bars, including a guide sleeve and at least two drivers connected to the guide sleeve, as well as a thrust transmission seat and a base assembly; The drive rods of two or more drivers are arranged in parallel, and the drive rods are all connected to the thrust transmission seat; The guide sleeve has a working window on its peripheral wall; The thrust transmission seat is slidably disposed within the guide sleeve, and the thrust transmission seat has a pushing part exposed through the working window; The base assembly is fixedly connected to the bottom of the guide sleeve; It also includes a riveting assembly, which includes a collar body, a collar body, and a rebar sleeve for being set within the working window; In the riveting state, the main body of the compression ring and the main body of the collar are respectively fitted onto the main bodies of the two steel bars to be riveted, and the steel bar sleeve is simultaneously fitted onto the main bodies of the two steel bars to be riveted. The main body of the compression ring is installed on the pushing part, and the main body of the collar is installed on the base assembly.

[0008] Optionally, the top of the guide sleeve is provided with a first steel bar receiving groove located at the top of the working window; The thrust section is provided with a second rebar receiving groove located directly below the first rebar receiving groove; The base assembly includes a base body and a base matching component; The base body is provided with an outward protrusion located directly below the working window, and the outward protrusion is provided with a third steel bar receiving groove. The base matching component is detachably mounted on the protruding part, and the base matching component has a rebar receiving matching groove that is disposed opposite to the third rebar receiving groove.

[0009] Optionally, the top of the base body is provided with a semi-circular first mounting step; The base fitting component includes an integrally formed fitting body and a semi-circular suspension arm, with the suspension arm located at the top of the fitting body. The top of the protruding part is also provided with a support step that matches the shape of the bottom of the suspension arm, and the side wall of the protruding part is provided with a matching part mounting groove for installing the matching part body. The matching component body is inserted into the matching component mounting slot, the suspension arm is fixed on the supporting step, and the base matching component is suspended on the outer protrusion of the base body through the suspension arm. The top of the suspension arm is provided with a second mounting step that is opposite to the first mounting step. The second mounting step is semi-circular and can form an annular mounting step with the first mounting step for mounting the collar body.

[0010] Optionally, the pushing part is provided with a sleeve retaining ring groove; The top of the sleeve ring body is provided with a sleeve ring retaining protrusion that is adapted to the sleeve ring retaining groove, and the sleeve ring body is engaged in the sleeve ring retaining groove of the pushing part through the sleeve ring retaining protrusion.

[0011] Optionally, the main body of the compression ring is a split structure; One half of the main body of the compression ring is locked inside the compression ring groove, and the other half is locked outside the compression ring groove. The main body of the sleeve pressure ring also includes a reduced diameter section disposed at the bottom of the sleeve pressure ring retaining protrusion and an equal diameter section disposed at the bottom of the reduced diameter section.

[0012] Optionally, the drive rod is detachably connected to the thrust transmission seat circumferentially along the central axis of the guide sleeve.

[0013] Optionally, the driver further includes a drive housing, and the end of the drive housing near the free end of the drive rod is provided with a connecting thread; The top of the guide sleeve is provided with multiple connecting screw holes, and the driver is detachably connected to the guide sleeve through the connecting threads on the drive housing; The thrust transmission seat is also provided with a mounting hole located directly below the connecting screw hole, and the drive rod is detachably connected to the thrust transmission seat.

[0014] Optionally, the drive rod is oscillatingly connected to the thrust transmission seat, and the oscillation angle range of the drive rod is 1° to 3°.

[0015] Optionally, the guide sleeve may also have two oppositely arranged detection windows, which are strip-shaped and vertically arranged.

[0016] On the other hand, this application provides a method for anti-eccentric load cold extrusion riveting of reinforcing bars, applicable to any of the above-described anti-eccentric load cold extrusion riveting devices for reinforcing bars, specifically including the following steps: S1. Assemble the two main bodies of the reinforcing bars to be riveted onto the main body of the compression ring and the main body of the compression ring, respectively, and then fit the reinforcing bar sleeve onto the two main bodies of the reinforcing bars to be riveted, thus completing the assembly of the main bodies of the reinforcing bars to be riveted: S2. Install the assembled steel bar body and riveting components onto the thrust transmission seat and base assembly respectively to complete the riveting preparation work of the steel bar body. S3. Simultaneously start all the drivers, so that the drive rods of the drivers push the thrust transmission seat, which in turn causes the sleeve ring body on the thrust transmission seat to move downward, thereby squeezing the steel sleeve to deform, so that the two steel bodies complete the cold extrusion riveting process.

[0017] The beneficial effects of this invention are: I. This application, by setting up multiple parallel actuators, a guide sleeve, and a thrust transmission seat slidably disposed in the guide sleeve, and the main body of the riveting assembly's compression ring disposed in the thrust transmission seat, allows the riveting device of this application to transmit the driving force of multiple actuators simultaneously to the main body of the riveting assembly's compression ring through the thrust transmission seat during riveting. Furthermore, the thrust transmission seat is slidably disposed within the guide sleeve. Therefore, even if an eccentric load occurs during the riveting of the reinforcing steel body, the eccentric load can be limited by the guide sleeve and the thrust transmission seat, preventing it from affecting the drive rod of the actuator. In particular, since this application has multiple actuators, the eccentric load, after being weakened by the first round of the thrust transmission seat, can be reduced in impact on a single actuator by the simultaneous bearing of multiple actuators.

[0018] Therefore, the core technical concept of this application is to limit and weaken the off-center load force during the riveting process by using a guide sleeve and a thrust transmission seat, and at the same time use multiple drivers to share the weakened off-center load force so that the off-center load force during the riveting process will not have an adverse effect on the drivers.

[0019] Second, the drive rod of this application can be fixedly or movably connected to the thrust transmission seat. When the drive rod is movably connected to the thrust transmission seat, this application not only uses the guiding effect between the guide sleeve and the thrust transmission seat to weaken the influence of the off-center load, but also uses the fact that the drive rod can swing to a certain extent to directly isolate the influence of the off-center load. That is, when the entire device is subjected to riveting force during the riveting process, the thrust transmission seat effectively plays a role in weakening and isolating the off-center load, so that the off-center load will not be transmitted to the driver at all, which can completely solve the technical problem. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of Embodiment 1 of this application.

[0021] Figure 2 This is a three-dimensional exploded structure diagram of Embodiment 1 of this application.

[0022] Figure 3 This is a three-dimensional structural diagram of the base body in Embodiment 1 of this application.

[0023] Figure 4 This is a three-dimensional structural diagram of the base matching component in Embodiment 1 of this application.

[0024] Figure 5 This is a three-dimensional structural diagram of the main body of the compression ring in Embodiment 1 of this application.

[0025] Figure 6 This is a schematic diagram of the left-side structure of Embodiment 1 of this application.

[0026] Figure 7This is a schematic diagram of the main structure of Embodiment 1 of this application.

[0027] Figure 8 for Figure 4 A schematic diagram of the cross-sectional structure of AA.

[0028] Figure 9 This is a cross-sectional view of the structure of Embodiment 2 of this application when the drive rod is oscillatingly connected to the thrust transmission seat.

[0029] Explanation of reference numerals in the attached figures: 1-Rebar body, 2-Driver, 21-Drive rod, 211-Hemispherical connection end, 212-Expansion joint, 22-Drive housing, 221-Connecting thread, 3-Guide sleeve, 301-Guide cavity, 302-Working window, 303-Detection window, 304-Connecting thread, 305-First rebar receiving groove, 4-Base assembly, 41-Base body, 411-Outer protrusion, 412-Supporting step, 413-First mounting step, 414-Third rebar receiving groove, 415-Piece Accessory mounting slot, 42-base matching part, 421-matching part body, 422-rebar receiving matching slot, 423-suspension arm, 424-second mounting step, 5-thrust transmission seat, 501-mounting hole, 51-pressing part, 511-second rebar receiving slot, 512-clasp ring groove, 6-riveting assembly, 61-clasp ring body, 611-reduced diameter section, 612-equal diameter section, 613-clasp ring protrusion, 62-clasp ring body, 63-rebar sleeve, 7-lifting lug, 8-connecting nut. Detailed Implementation

[0030] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0031] Example 1: like Figures 1 to 8 As shown, this embodiment provides a cold extrusion riveting device for preventing eccentric loading of reinforcing bars, including a guide sleeve 3 and at least two drivers 2 connected to the guide sleeve 3, as well as a thrust transmission seat 5 and a base assembly 4; The drive rods 21 of two or more actuators 2 are arranged in parallel, and the drive rods 21 are all connected to the thrust transmission seat 5; The guide sleeve 3 has a working window 302 on its peripheral wall; The thrust transmission seat 5 is slidably disposed inside the guide sleeve 3, and the thrust transmission seat 5 has a pushing part 51 exposed through the working window 302; The base assembly 4 is fixedly connected to the bottom of the guide sleeve 3; It also includes a riveting assembly 6, which includes a collar body 61, a collar body 62 and a steel bar sleeve 63 for being disposed within the working window 302; In the riveting state, the sleeve pressure ring body 61 and the sleeve ring body 62 are respectively fitted onto the two steel bar bodies 1 to be riveted, and the steel bar sleeve 63 is simultaneously fitted onto the two steel bar bodies 1 to be riveted. The sleeve pressure ring body 61 is installed on the pushing part 51, and the sleeve ring body 62 is installed on the base assembly 4.

[0032] This embodiment uses multiple parallel actuators 2, a guide sleeve 3, and a thrust transmission seat 5 slidably disposed on the guide sleeve 3. The main body 61 of the riveting assembly 6 is disposed on the thrust transmission seat 5. This allows the riveting device of this application to transmit the driving force of multiple actuators 2 to the main body 61 of the riveting assembly 6 simultaneously through the thrust transmission seat 5 during riveting. Furthermore, the thrust transmission seat 5 is slidably disposed within the guide sleeve 3. Therefore, even if an off-center load occurs during the riveting process of the steel bar body 1, the off-center load can be limited by the guide sleeve 3 and the thrust transmission seat 5, preventing it from affecting the driving rod 21 of the actuator 2. In particular, since multiple actuators 2 are provided in this application, the off-center load, after being weakened by the first round of the thrust transmission seat 5, can be reduced in its impact on a single actuator 2 by the simultaneous bearing of multiple actuators 2.

[0033] Therefore, the core technical concept of this embodiment is to use the guide sleeve 3 and the thrust transmission seat 5 to limit and weaken the off-center load during the riveting process, and at the same time use multiple drivers 2 to share the weakened off-center load, so that the off-center load during the riveting process will not have an adverse effect on the drivers 2.

[0034] In this embodiment, the guide sleeve 3 is also provided with a lifting lug 7, which facilitates the installation and transfer of the entire riveting device.

[0035] In this embodiment, the top of the guide sleeve 3 is provided with a first steel bar receiving groove 305 located at the top of the working window 302; The thrust section is provided with a second steel bar receiving groove 511 located directly below the first steel bar receiving groove 305; The base assembly 4 includes a base body 41 and a base matching part 42; The base body 41 is provided with an outward protrusion 411 located directly below the working window 302, and the outward protrusion 411 is provided with a third steel bar receiving groove 414. The base matching component 42 is detachably mounted on the protrusion 411, and the base matching component 42 has a steel bar receiving matching groove 422 that is disposed opposite to the third steel bar receiving groove 414.

[0036] In this embodiment, since the length of the main body 1 of the steel bar to be riveted is not fixed, the length of the main body 1 of the steel bar needs to be determined according to the actual application scenario. Therefore, the main body 1 of the steel bar must be offset during riveting. By setting the first steel bar receiving groove 305, the second steel bar receiving groove 511, and the third steel bar receiving groove 414, this application can make the two main bodies of the steel bar as close as possible to the central axis of the guide sleeve 3 during riveting, thereby reducing the off-center load of the riveting device.

[0037] In this embodiment, a semi-circular first mounting step 413 is provided on the top of the base body 41; The base matching component 42 includes an integrally formed matching component body 421 and a semi-circular annular suspension arm 423, with the suspension arm 423 located on top of the matching component body 421. The top of the protruding part 411 is also provided with a support step 412 that is adapted to the shape of the bottom of the suspension arm 423, and the side wall of the protruding part 411 is provided with a matching part mounting groove 415 for installing the matching part body 421. The matching component body 421 is inserted into the matching component mounting groove 415, the suspension arm 423 is clipped onto the supporting step 412, and the base matching component 42 is suspended on the outer protrusion 411 of the base body 41 through the suspension arm 423. The top of the suspension arm 423 is provided with a second mounting step 424 that is opposite to the first mounting step 413. The second mounting step 424 is semi-circular and can form an annular mounting step with the first mounting step 413 for mounting the collar body 62.

[0038] In this embodiment, by setting a first mounting step 413 and a second mounting step 424, and the first mounting step 413 and the second mounting step 424 can form an annular mounting step, the collar body 62 in this embodiment can be installed into the annular mounting step, thereby limiting the collar body 62 during riveting in terms of shape and structure, ensuring the stability of the rebar riveting. Since the base matching part 42 is suspended and fixed on the outer protrusion 411 of the base body 41 by the suspension arm 423, when it is necessary to install the rebar body 1 with the collar body 62 into the third rebar receiving groove 414 of the outer protrusion 411, it can be directly snapped in. When installing the rebar body 1 with the collar body 62, it can be first snapped into the third rebar receiving groove 414, and then the base matching part 42 can be installed into the outer protrusion 411 to form an annular mounting step, and then the collar body 62 can be snapped into the annular mounting step. This design in this embodiment takes into account both the convenience of installation and the stability during the riveting process. Furthermore, the collar body 62 serves as a pressure-bearing component during the riveting process. Its installation on the annular mounting step allows the pressure generated during riveting to be evenly transmitted to the outer protrusion 411 of the entire base assembly 4 through the annular mounting step, preventing the problem of concentrated load distribution and ensuring the stability of the riveting.

[0039] In this embodiment, the pushing part 51 is provided with a sleeve pressure ring groove 512; The top of the sleeve ring body 61 is provided with a sleeve ring retaining protrusion 613 that is adapted to the sleeve ring retaining groove 512. The sleeve ring body 61 is engaged in the sleeve ring retaining groove 512 of the pushing part 51 through the sleeve ring retaining protrusion 613.

[0040] In this embodiment, by setting the sleeve pressure ring groove 512, the sleeve pressure ring body 61 can be directly inserted into the sleeve pressure ring groove 512 to complete the installation and fixation, and the whole installation process is extremely convenient.

[0041] In this embodiment, as Figure 5 As shown, the main body 61 of the sleeve pressure ring is a split structure composed of two parts; One half of the main body 61 of the compression ring is engaged inside the compression ring groove 512, and the other half is engaged outside the compression ring groove 512. The main body 61 of the compression ring also includes a reduced diameter section 611 disposed at the bottom of the compression ring retaining protrusion 613 and an equal diameter section 612 disposed at the bottom of the reduced diameter section 611.

[0042] In this embodiment, by setting a split-type compression ring body 61, the assembly and disassembly of the compression ring body 61 can be made more convenient. When installing the rebar body 1 into the first rebar receiving groove 305 and the second rebar receiving groove 511, a part of the compression ring body 61 can be installed into the compression ring slot 512 first, and then the rebar body 1 can be directly inserted into the first rebar receiving groove 305 and the second rebar receiving groove 511. Then, the other part of the compression ring body 61 can be inserted into the compression ring slot 512 to complete the installation. This split-type design of the compression ring body 61 in this embodiment eliminates the need for high-precision control of the height position of the rebar body 1 when installing the rebar body 1, and eliminates the need to constantly consider whether the compression ring protrusion 613 of the compression ring body 61 is aligned with the compression ring slot 512, which can effectively reduce the installation difficulty.

[0043] In this embodiment, the drive rod 21 is detachably connected to the thrust transmission seat 5 in a uniform circumferential direction along the central axis of the guide sleeve 3, which can avoid thrust concentration and improve the uniformity of thrust transmission in the thrust transmission seat 5.

[0044] In this embodiment, the driver 2 further includes a driver housing 22, and a connecting thread 221 is provided at one end of the driver housing 22 near the free end of the driver rod 21. The top of the guide sleeve 3 is provided with multiple connecting screw holes 304, and the driver 2 is detachably connected to the guide sleeve 3 through the connecting thread 221 on the drive housing 22. The thrust transmission seat 5 is also provided with a mounting hole 501 located directly below the connecting screw 304, and the drive rod 21 is detachably connected to the thrust transmission seat 5.

[0045] In this embodiment, the drive housing 22 of the driver 2 is detachably connected to the guide sleeve 3, and the drive rod 21 is detachably connected to the thrust transmission seat 5, which facilitates the replacement and maintenance of the driver 2. In this embodiment, the actuator 2 can be a hydraulic cylinder. In some embodiments, a linear actuator 2 such as a pneumatic cylinder or an electric cylinder can also be used, which will not be elaborated here.

[0046] In this embodiment, the guide sleeve 3 is further provided with two oppositely arranged detection windows 303, which are strip-shaped and arranged vertically.

[0047] In this embodiment, photoelectric sensors can be set on both sides of the detection window 303 to detect whether the thrust transmission seat 5 has moved down into place. Other sensors can also be set to detect or directly observe. This detection method is a conventional detection method and is not the focus of this embodiment. It will not be described in detail here.

[0048] In this embodiment, the drive rod 21 is fixedly connected to the thrust transmission seat 5 by the connecting nut 8. Example 2: In this embodiment, the drive rod 21 is oscillatingly connected to the thrust transmission seat 5. The oscillation angle of the drive rod 21 is 2°. Technicians can also set it to other angles as needed, such as 1° or 3°, which will not be elaborated here.

[0049] In this embodiment, as Figure 9 As shown, the free end of the drive rod 21 is a hemispherical connecting end 211, and a deformation joint 212 is provided at the hemispherical connecting end 211. The thrust transmission seat 5 is provided with a ball head mounting groove that matches the shape of the hemispherical connecting end 211, so that the drive rod 21 can be swung and connected to the thrust transmission seat 5.

[0050] In this embodiment, since the drive rod 21 is swayably connected to the thrust transmission seat 5, this embodiment not only uses the guiding effect between the guide sleeve 3 and the thrust transmission seat 5 to weaken the influence of the off-center load, but also uses the swaying of the drive rod 21 to a certain extent to directly isolate the influence of the off-center load. That is, when the entire device is subjected to riveting force during the riveting process, the thrust transmission seat 5 effectively plays the role of weakening and isolating, so that the off-center load will not be transmitted to the driver 2 at all, which can completely solve the technical problem.

[0051] The remaining structures in this embodiment are the same as those in Embodiment 1 above, and will not be described again here.

[0052] Example 3: This embodiment provides a method for preventing eccentric load cold extrusion riveting of reinforcing bars, applicable to a method for preventing eccentric load cold extrusion riveting of reinforcing bars according to Embodiment 1 or Embodiment 2 above, specifically including the following steps: S1. Assemble the two main bodies 1 of the reinforcing bars to be riveted onto the main body 61 and the main body 62 of the collar respectively, and then fit the reinforcing bar sleeve 63 onto the two main bodies 1 of the reinforcing bars to be riveted, thus completing the assembly of the main bodies 1 of the reinforcing bars to be riveted: S2. Install the assembled steel bar body 1 and riveting assembly 6 onto the thrust transmission seat 5 and the base assembly 4 respectively to complete the riveting preparation work of the steel bar body 1. S3. Simultaneously start all the drivers 2, so that the drive rod 21 of the driver 2 pushes the thrust transmission seat 5, thereby causing the sleeve pressure ring body 61 on the thrust transmission seat 5 to move downward, thereby squeezing the steel bar sleeve 63 to deform, so that the two steel bar bodies 1 complete the cold extrusion riveting process.

[0053] In this embodiment, after the riveting process is completed, the process further includes S4, disassembling the riveted steel bar body 1. During disassembly, the base matching part 42 of the base assembly 4 needs to be disassembled first. Then, the riveted steel bar body 1 and the remaining parts on the steel bar body can be directly removed from the first steel bar receiving groove 305, the second steel bar receiving groove 511 and the third steel bar receiving groove 414 to complete a single steel bar riveting process.

[0054] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A cold extrusion riveting device for preventing eccentric loading of reinforcing bars, characterized in that, Includes a guide sleeve (3) and at least two actuators (2) connected to the guide sleeve (3), as well as a thrust transmission seat (5) and a base assembly (4); The drive rods (21) of two or more drivers (2) are arranged in parallel, and the drive rods (21) are all connected to the thrust transmission seat (5); The guide sleeve (3) has a working window (302) on its peripheral wall; The thrust transmission seat (5) is slidably disposed in the guide sleeve (3), and the thrust transmission seat (5) has a pushing part (51) exposed through the working window (302). The base assembly (4) is fixedly connected to the bottom of the guide sleeve (3); It also includes a riveting assembly (6), which includes a collar body (61), a collar body (62), and a steel bar sleeve (63) for being disposed in the working window (302). In the riveting state, the main body of the compression ring (61) and the main body of the compression ring (62) are respectively fitted onto the main bodies of the two steel bars to be riveted (1), and the steel bar sleeve (63) is simultaneously fitted onto the main bodies of the two steel bars to be riveted (1). The main body of the compression ring (61) is installed on the pushing part (51), and the main body of the compression ring (62) is installed on the base assembly (4).

2. The anti-eccentric cold extrusion riveting device for reinforcing bars according to claim 1, characterized in that, The top of the guide sleeve (3) is provided with a first steel bar receiving groove (305) located at the top of the working window (302); The thrust section is provided with a second steel bar receiving groove (511) located directly below the first steel bar receiving groove (305); The base assembly (4) includes a base body (41) and a base matching part (42). The base body (41) is provided with an outward protrusion (411) located directly below the working window (302), and the outward protrusion (411) is provided with a third steel bar receiving groove (414). The base matching member (42) is detachably disposed on the protrusion (411), and the base matching member (42) has a steel bar receiving matching groove (422) disposed opposite to the third steel bar receiving groove (414).

3. The anti-eccentric cold extrusion riveting device for reinforcing bars according to claim 2, characterized in that, The top of the base body (41) is provided with a semi-circular first mounting step (413). The base matching component (42) includes an integrally formed matching component body (421) and a semi-circular ring suspension arm (423), with the suspension arm (423) located on top of the matching component body (421); The top of the protruding part (411) is also provided with a support step (412) that is adapted to the shape of the bottom of the suspension arm (423), and the side wall of the protruding part (411) is provided with a matching part mounting groove (415) for installing the matching part body (421). The matching component body (421) is inserted into the matching component mounting groove (415), the suspension arm (423) is locked on the supporting step (412), and the base matching component (42) is suspended on the outer protrusion (411) of the base body (41) through the suspension arm (423); The top of the suspension arm (423) is provided with a second mounting step (424) that is opposite to the first mounting step (413). The second mounting step (424) is semi-circular and can form an annular mounting step with the first mounting step (413) for mounting the collar body (62).

4. The anti-eccentric cold extrusion riveting device for reinforcing bars according to claim 1, characterized in that, The pushing part (51) is provided with a sleeve ring groove (512); The top of the sleeve ring body (61) is provided with a sleeve ring retaining protrusion (613) that is adapted to the sleeve ring retaining groove (512). The sleeve ring body (61) is engaged in the sleeve ring retaining groove (512) of the pushing part (51) through the sleeve ring retaining protrusion (613).

5. The anti-eccentric cold extrusion riveting device for reinforcing bars according to claim 4, characterized in that, The main body (61) of the sleeve pressure ring is a split structure; One half of the main body (61) of the compression ring is engaged inside the compression ring groove (512), and the other half is engaged outside the compression ring groove (512). The main body (61) of the compression ring also includes a reduced diameter section (611) disposed at the bottom of the compression ring protrusion (613) and an equal diameter section (612) disposed at the bottom of the reduced diameter section (611).

6. The anti-eccentric cold extrusion riveting device for reinforcing bars according to claim 1, characterized in that, The drive rod (21) is detachably connected to the thrust transmission seat (5) in a uniform circumferential direction along the central axis of the guide sleeve (3).

7. A cold extrusion riveting device for preventing eccentric loading of reinforcing bars according to claim 6, characterized in that, The driver (2) also includes a drive housing (22), and a connecting thread (221) is provided at one end of the drive housing (22) near the free end of the drive rod (21). The top of the guide sleeve (3) is provided with multiple connecting screw holes (304), and the driver (2) is detachably connected to the guide sleeve (3) through the connecting thread (221) on the drive housing (22); The thrust transmission seat (5) is also provided with a mounting hole (501) located directly below the connecting screw (304), and the drive rod (21) is detachably connected to the thrust transmission seat (5).

8. The anti-eccentric cold extrusion riveting device for reinforcing bars according to claim 7, characterized in that, The drive rod (21) is oscillatingly connected to the thrust transmission seat (5), and the oscillation angle range of the drive rod (21) is 1° to 3°.

9. A cold extrusion riveting device for preventing eccentric loading of reinforcing bars according to claim 1, characterized in that, The guide sleeve (3) also has two oppositely arranged detection windows (303), which are strip-shaped and arranged vertically.

10. A method for preventing eccentric load cold extrusion riveting of reinforcing bars, applicable to the eccentric load cold extrusion riveting device for reinforcing bars as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. Assemble the two steel bar bodies (1) to be riveted onto the sleeve ring body (61) and the sleeve ring body (62) respectively, and fit the steel bar sleeve (63) onto the two steel bar bodies (1) to be riveted, thus completing the assembly of the steel bar bodies (1) to be riveted: S2. Install the assembled steel bar body (1) and riveting assembly (6) onto the thrust transmission seat (5) and base assembly (4) respectively to complete the riveting preparation work of the steel bar body (1); S3. Simultaneously start all the drivers (2), so that the drive rod (21) of the driver (2) pushes the thrust transmission seat (5), thereby causing the sleeve pressure ring body (61) on the thrust transmission seat (5) to move downward, thereby squeezing the steel sleeve (63) to deform, so that the two steel bodies (1) complete the cold extrusion riveting process.

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