Self-centering type feeding device

Abstract

The technical scheme belongs to the technical field of steel bar processing equipment and specifically relates to a self-centering type feeding device, which comprises a rack, a driving mechanism arranged on the rack, a feeding mechanism driven by the driving mechanism, two clamping components movably arranged on the rack and a driving motor, a pipe material channel for pipe materials to pass through being formed between the two clamping components, a linkage mechanism comprising a linkage member rotatably arranged on the rack, a swing rod penetrating through the linkage member and two pivot members, the two pivot members being rotatably connected to the two clamping components respectively, the pivot members being provided with sleeve holes, and the two ends of the swing rod penetrating into the sleeve holes corresponding to the pivot members respectively. When the driving motor drives one of the clamping components to move, the swing rod and the linkage member are driven to rotate, the clamping components on the two sides are relatively synchronously away from or close to each other through the rotation cooperation of the pivot members, and the size of the pipe material channel is adjusted.

Description

Technical Field

[0001] This technical solution relates to the field of steel bar processing equipment technology, specifically to a self-centering feeding device. Background Technology

[0002] In the field of construction engineering, steel bars are an important building material, and their processing is crucial to the quality and efficiency of the project. Steel bar cutting machines are one of the essential pieces of equipment in steel bar processing. They are mainly used to cut steel bars to a fixed length and are equipped with a feeding device to transport the steel.

[0003] For example, Chinese Patent Publication No. CN204096569U discloses an automatic feeding device, which includes a motor, a reducer, and a pressure roller assembly. The pressure roller assembly has a clamping pressure roller and an X-shaped cross device. A large gear is provided on the output shaft of the reducer, and a small gear is provided on the clamping pressure roller. The large gear and the small gear mesh to realize the transmission of power. The intersection of the cross device is hinged to the machine base by a pin. The connecting rod I and connecting rod II of the cross device can rotate relative to each other. When subjected to force, they generate shear force and clamp the round steel clamp that passes through the cross device through the clamping pressure roller.

[0004] In existing automated feeding equipment, the gap adjustment and pressure control between the aforementioned pressure roller assemblies usually rely on manual or mechanical step-by-step adjustment. When processing materials such as round steel of different diameters or thicknesses, operators need to adjust the position of each pressure roller and its corresponding cross linkage mechanism one by one. This is not only cumbersome and time-consuming, but also makes it difficult to ensure the uniformity and synchronization of pressure at multiple clamping points. This can easily lead to uneven force on the material during conveying, resulting in slippage, deviation, or surface damage. This affects the accuracy and continuity of subsequent processing steps, leading to reduced production efficiency. Utility Model Content

[0005] This technical solution addresses the problem of cumbersome and inefficient operation caused by the need for manual step-by-step adjustment of the pressure roller in existing feeding devices, by providing a self-centering feeding device.

[0006] The purpose of this technical solution is achieved as follows: A self-centering feeding device, comprising: frame; The drive mechanism is mounted on the frame; The feeding mechanism is driven by the drive mechanism. The feeding mechanism includes two clamping components movably disposed on the frame and a drive motor. A pipe channel for pipes to pass through is formed between the two clamping components. A linkage mechanism is provided on the frame, which drives the two clamping components to move away from or towards each other synchronously, thereby adjusting the size of the pipe channel.

[0007] Through the above technical solution, in normal use, a self-centering feeding device drives a clamping component directly connected to it to move along the frame via a drive motor. The clamping component, through a linkage mechanism, drives another clamping component to cooperate. The two components move closer or further apart synchronously, thereby symmetrically adjusting the size of the tube channel formed between them, achieving automatic centering, applying synchronous and uniform clamping force to the tube, and improving convenience. Preferably, the linkage mechanism includes a linkage component rotatably mounted on the frame, a sway bar passing through the linkage component, and two pivot components. The two pivot components are respectively rotatably connected to two clamping assemblies. Each pivot component has a sleeve hole, and both ends of the sway bar pass through the sleeve holes of the corresponding pivot components. When the drive motor drives one of the clamping components to move, the clamping component drives the linkage component to rotate, and through the rotational engagement of the pivot component, it drives the other clamping component to move relative to it.

[0008] With the above technical solution, when the clamping component on one side moves, it drives the pivot component connected to it to move. The pivot component drives one end of the swing rod passing through its sleeve hole to swing accordingly. The swing rod will force the linkage component to rotate, so that the other end of the swing rod pushes the other pivot component and the corresponding clamping component to move in the opposite direction. Only a single drive input is needed to make the two clamping components move closer or further away from each other synchronously.

[0009] Preferably, the linkage component includes: A mounting base is disposed on the frame. The mounting base has a connecting part and a mounting part. The frame is provided with a corresponding through hole. The connecting part passes through the through hole and has an external thread structure for threaded connection of the connecting parts. The linkage wheel has a clearance hole that matches the mounting part. The linkage wheel is rotatably sleeved on the mounting part through the clearance hole. The linkage wheel is connected to the sway rod.

[0010] Through the above technical solution, the linkage is the rotation fulcrum of the yaw rod. One end of the connecting part of the mounting base passes through the through hole on the frame and is locked to the external thread structure with a nut. The mounting base is fixed on the frame. The clearance hole in the center of the linkage wheel is fitted onto the mounting part through a bearing or bushing, so that it can rotate freely relative to the mounting base. This enables the yaw rod and the linkage wheel to rotate stably around the mounting part when the yaw rod is subjected to forces from both ends. It provides a precise and low-friction rotation center, ensuring the smoothness of force transmission and the accuracy of motion.

[0011] Preferably, the clamping assembly includes: The sliding seat is provided with a guide rod on the frame, and the sliding seat is movably mounted on the guide rod. Several rotating shafts, rotatably connected to the sliding seat; and The feeding wheel is coaxially fixed to the front end of the rotating shaft. The feeding wheels corresponding to the two clamping components rotate in coordination to clamp and transport the pipe fittings.

[0012] With the above technical solution, the sliding seat moves linearly along the axis of the guide rod, and the feeding wheels of the two clamping components are arranged in pairs to form a clamping point. Multiple pairs of such feeding wheels are arranged along the feeding direction to form a continuous pipe channel. When the drive mechanism drives the rotating shaft to rotate, all feeding wheels rotate synchronously. The linear conveying of the pipe is achieved by relying on the friction with the surface of the pipe. The movement of the sliding seat is used to adjust the gap between the pairs of feeding wheels to accommodate pipes of different diameters.

[0013] Preferably, the feeding wheel has an annular groove recessed along its outer side wall.

[0014] Through the above technical solution, the cross-sectional shape of the annular groove of the feeding wheel is adapted to the shape of the round steel or pipe to be conveyed, so that when the pipe is clamped between the feeding wheels, its surface will be partially embedded in the annular groove, preventing the pipe from axially moving or shifting during the conveying process, thus improving the reliability of the conveying.

[0015] Preferably, the sliding seat is provided with an assembly cavity that matches the linkage component. The cavity wall of the assembly cavity is provided with a clearance groove. The clearance groove is provided with a limiting hole and a limiting groove along the opposite groove wall. The two ends of the pivot component are respectively rotatably limited within the limiting hole and the limiting groove.

[0016] Through the above technical solution, the assembly cavity on the sliding seat is used to accommodate the side of the pivot component. One end of the pivot component is inserted into and rotated in the rotation limiting hole, while the other end is inserted into the rotation limiting groove to rotate, thereby limiting the rotation position of the pivot component. The clearance groove provides the necessary space for the pivot component to swing, preventing it from interfering with the sliding seat body.

[0017] Preferably, the inner wall of the rotation limiting groove is provided with a clearance cavity for avoiding the sway bar.

[0018] Through the above technical solution, an avoidance cavity is machined inward on the inner wall of the rotation limiting groove. The avoidance cavity further extends outward from the outer end of the swing rod through the sleeve hole to provide additional movement space, thereby expanding the swing range and angle of the swing rod and avoiding accidental interference and collision.

[0019] Preferably, the two clamping components are divided into a first clamping component and a second clamping component, the output shaft of the drive motor is connected to the sliding seat of the first clamping component, and a universal coupling is provided between the drive mechanism and the rotating shaft of the second clamping component.

[0020] Through the above technical solution, the drive motor directly drives the first clamping component to adjust the gap between the two clamping components; while the drive mechanism transmits power to the rotating shaft on the second clamping component through a universal coupling. The universal coupling compensates for the displacement and angle deviation of the second clamping component, ensuring that the power can still be continuously and smoothly transmitted to all the feeding wheels of the second clamping component during the movement of the clamping component, so as to realize the synchronous rotation and conveying of the feeding wheels on both sides.

[0021] Preferably, the frame is provided with a plurality of elongated holes corresponding to the rotating shaft of the second clamping component, and the length direction of the elongated holes is parallel to the moving direction of the second clamping component.

[0022] Through the above technical solution, the rear end of the shaft of the second clamping component passes through these elongated holes and is connected to the universal coupling, so that the second clamping component is driven to move, and its shaft will move up and down relative to the frame. The rear end of the shaft can slide freely in the elongated holes along the length direction, thereby adapting to this position change and providing the necessary floating space.

[0023] Preferably, the frame is provided with a gearbox, and the drive mechanism is installed inside the gearbox. The drive mechanism includes: The main drive shaft, which is rotatably mounted inside the gearbox, is used to connect to the drive source; The drive gear is rotatably disposed within the gearbox and meshes with the main drive shaft; A drive shaft is coaxially fixed to the drive gear, and the two rotate synchronously. The drive shaft is perpendicular to the rotation axis of the main drive shaft. At least two driven shafts are rotatably disposed within the gearbox, and the driven shafts are perpendicular to the rotation axis of the drive shaft; The driven shaft is fitted with a first bevel gear, and the end of the drive shaft is fitted with a second bevel gear that meshes with the first bevel gear. The outer end of the driven shaft is used to connect to a universal coupling.

[0024] Through the above technical solution, the drive mechanism is integrated into a gearbox. The main drive shaft receives power from an external drive source and drives the active gear that meshes with it to rotate. The transmission shaft rotates synchronously with the active gear. The horizontal rotation of the transmission shaft is converted into the rotational motion of multiple driven shafts through a bevel gear pair. The outer end of the driven shaft is then connected to the shaft through a universal coupling, which ultimately drives the loading wheel to rotate. This realizes the power distribution and direction conversion from a single power source to multiple output shafts. The structure is compact and the transmission is reliable.

[0025] The key and beneficial technical effects of this technical solution compared to existing technologies are: 1. This technical solution achieves synchronous reverse movement of two clamping components through a single drive motor and linkage mechanism. The drive motor is directly connected to one clamping component to drive its movement, and drives the swing rod to swing through the pivot component. The swing rod forces the linkage component to rotate, causing the other clamping component to move synchronously in the opposite direction. The two clamping components can automatically move closer or further apart, thereby symmetrically adjusting the size of the formed pipe channel, realizing the automatic centering function, and applying synchronous and uniform clamping force to the pipe, improving the convenience of operation.

[0026] 2. This technical solution provides a pivot point for the yaw rod through a linkage component, enabling the yaw rod to rotate stably around the mounting part together with the linkage wheel when subjected to forces at both ends. This ensures both the smoothness of force transmission and improves motion accuracy.

[0027] 3. This technical solution achieves stable installation and reliable swing of the pivot component by opening a clearance groove on the side wall of the assembly cavity of the sliding seat and setting corresponding rotation limiting holes and rotation limiting grooves on the opposite groove walls. The clearance groove provides clearance space for the swing of the swing rod, ensuring the linkage between the pivot component and the swing rod, enhancing the rigidity and motion accuracy of the mechanism, and improving the overall reliability of operation. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of Example 1.

[0029] Figure 2 This is a schematic diagram of a partial explosion in Example 1.

[0030] Figure 3 This is a partial exploded view of the two clamping components in Example 1.

[0031] Figure 4 This is a partial exploded view of the first clamping component in Example 1.

[0032] Figure 5 This is one of the partial cross-sectional schematic diagrams of the linkage mechanism in Example 1.

[0033] Figure 6 This is the second partial cross-sectional schematic diagram of the linkage mechanism in Example 1.

[0034] Figure 7 As in Example 1 Figure 1 Another perspective illustration.

[0035] Figure 8 This is a schematic diagram of the overall structure of the drive mechanism in Example 1.

[0036] Figure 9 This is a partial cross-sectional view of Example 2.

[0037] Reference numerals: 1. Frame; 2. Drive mechanism; 21. Main drive shaft; 22. Drive gear; 23. Transmission shaft; 24. Driven rotating shaft; 3. Clamping assembly; 31. Sliding seat; 32. Rotating shaft; 33. Feeding wheel; 4. Linkage mechanism; 41. Linkage component; 411. Mounting seat; 412. Linkage wheel; 42. Swing rod; 43. Pivot component; 5. Drive motor; 6. Tube material channel; 7. Sleeve hole; 81. Connecting part; 82. Mounting part; 9. Clearance hole; 10. Guide rod; 11. Annular groove; 12. Clearance groove; 13. Rotation limiting hole; 14. Rotation limiting groove; 15. Clearance cavity; 16. Elongated hole; 17. Gearbox; 181. Bevel gear one; 182. Bevel gear two; 19. Assembly cavity; 301. First clamping assembly; 302. Second clamping assembly; 100. Through hole; 200. Universal coupling. Detailed Implementation

[0038] The specific implementation of this technical solution will be further described in detail below with reference to the accompanying drawings.

[0039] Example 1: See Figure 1 A self-centering feeding device includes a frame 1, on which a drive mechanism 2, a feeding mechanism, and a linkage mechanism 4 are mounted. The feeding mechanism includes two clamping components 3 and a drive motor 5. The two clamping components 3 are located on the front side of the frame 1, and each clamping component 3 is movably arranged relative to the frame 1 in the direction of vertical movement. The two clamping components 3 are specifically a first clamping component 301 and a second clamping component 302. The first clamping component 301 is located above the second clamping component 302, and a pipe channel 6 for pipes to pass through is formed between the first clamping component 301 and the second clamping component 302. The drive motor 5 is mounted on the top of the frame 1, and its output end passes downward through the frame 1 and connects to the first clamping component 301. The drive motor 5 drives the first clamping component 301 to move. The first clamping component 301 moves away from or towards the second clamping component 302 in a relatively synchronous manner through the linkage mechanism 4, which is used to adjust the size of the pipe channel 6 to adapt to the feeding of pipes of different sizes.

[0040] See Figure 2 Each clamping assembly 3 includes a sliding seat 31, several rotating shafts 32, and a feeding wheel 33. The sliding seat 31 is slidably connected to the frame 1. The specific sliding method is as follows: the frame 1 is provided with two guide rods 10 in parallel, and the rods are arranged vertically. The sliding seat 31 is sleeved on the two guide rods 10 through guide sleeves to realize movement along the direction of the guide rods 10. There are two rotating shafts 32, which are spaced apart at both ends of the sliding seat 31. They are rotatably connected to the sliding seat 31 through bearings. The front end of the rotating shaft 32 is exposed off the sliding seat 31 away from the frame 1. The feeding wheel 33 is sleeved on the exposed end of the rotating shaft 32 and is coaxially fixed with the corresponding rotating shaft 32.

[0041] Among them, the feeding wheel 33 has an annular groove 11 recessed along its outer peripheral wall. In the two clamping components 3, the gap between the feeding wheels 33 arranged vertically opposite each other forms the above-mentioned pipe channel 6. The pipe is clamped between the feeding wheels 33 on both sides, and the two sides of the pipe are respectively limited in the annular grooves 11 on both sides.

[0042] See Figure 3 and Figure 4 The linkage mechanism 4 includes a linkage component 41, a swing rod 42, and a pivot component 43. The linkage component 41 is located between two sliding seats 31 and includes a mounting seat 411 and a linkage wheel 412. The mounting seat 411 is fixedly connected to the frame 1 and has a connecting part 81 and a mounting part 82. The mounting part 82 is located at the front end of the connecting part 81 and its size is larger than that of the connecting part 81. The inner side of the linkage wheel 412 has a clearance hole 9 that matches the mounting part 82. The clearance hole 9 is aligned with the mounting part 82 and fitted. The linkage wheel 412 is rotatably connected to the mounting part 82 through a bearing. Its rotation axis is parallel to the rotation axis of the rotating shaft 32. Each sliding seat 31 near the linkage wheel 412 has a clearance cavity 15 that matches the outer contour of the linkage wheel 412. The cavity 19 is fan-shaped and its cavity wall is arc-shaped. The clearance cavity 15 ensures that the sliding seats 31 on both sides can be as close as possible.

[0043] The mounting base 411 is fixed by the following method: the frame 1 has a through hole 100 that matches the connecting part 81. Since the cross-sectional dimension of the mounting part 82 is larger than the channel dimension of the through hole 100, after the connecting part 81 passes through the through hole 100, the plane of the mounting part 82 abuts against the outer peripheral side wall of the through hole 100 for positioning. The connecting part 81 has an external thread structure along its outer surface. The connector is tightened onto the external thread structure, and the connector and the mounting part 82 cooperate to abut against the opposite two end faces of the plate of the frame 1, thereby completing the installation of the mounting base 411.

[0044] The sway bar 42 is mounted on the linkage wheel 412 and fixed to the linkage wheel 412. The midpoint of the sway bar 42 is set at the rotation axis of the linkage component 41. The linkage wheel 412 is the rotation fulcrum of the sway bar 42. The linkage wheel 412 and the sway bar 42 rotate synchronously.

[0045] The pivot member 43 is roughly cylindrical in shape. There are two pivot members 43, which correspond one-to-one with the two sliding seats 31. The pivot member 43 is rotatably connected to the corresponding sliding seat 31. Each pivot member 43 has a through hole 7 on its side, and the diameter of the hole matches the cross-sectional size of the swing rod 42. The two ends of the swing rod 42 are respectively embedded in the through holes 7 of the two pivot members 43.

[0046] The pivot member 43 is rotated by the following method: the cavity wall of the assembly cavity 19 of the sliding seat 31 is provided with a relief groove 12. The inner side wall of the relief groove 12 near the frame 1 passes through the limited rotation hole 13, and the outer side wall opposite to the limited rotation hole 13 is provided with a limited rotation groove 14. The pivot member 43 passes through the limited rotation hole 13 and the relief groove 12 until its end is engaged in the relief groove 12. At this time, both ends are respectively limited in the limited rotation hole 13 and the relief groove 12, and rotate around its own axis.

[0047] See Figure 5 and Figure 6 This demonstrates the change in the size of the pipe channel 6 from small to large. The sliding seat 31 of the first clamping assembly 301 is driven upward by the drive motor 5. The sliding seat 31 drives the pivot 43 to move synchronously. The pivot 43 will swing around the fulcrum, and the linkage wheel 412 will rotate in coordination. During this process, the pivot 43 rotates around its own axis to adapt to the swing rod 42 passing through it. The pivot 43 slides a distance relative to the swing rod 42 along the sleeve hole 7. In this embodiment, the swing rod 42 uses the lever principle. The other end of the swing rod 42 cooperates with the pivot 43 of the second clamping assembly 302 to drive the sliding seat 31 of the second clamping assembly 302 to move downward, thereby realizing the mutual separation of the two clamping assemblies 3. Conversely, the mutual proximity of the two clamping assemblies 3 is also operated in the above manner to realize the change in the size of the pipe channel 6 from large to small.

[0048] It should be noted that the control drive amount of the drive motor 5 is set by the control system to ensure that the end of the swing rod 42 is always embedded within the length range of the sleeve hole 7, so as to avoid the swing rod 42 and the pivot 43 from disengaging and affecting normal operation.

[0049] See Figure 7 and Figure 8The frame 1 is equipped with a gearbox 17, and a drive mechanism 2 is installed inside the gearbox 17. The drive mechanism 2 includes a main drive shaft 21, a drive gear 22, a transmission shaft 23, and at least two driven shafts 24. The main drive shaft 21 is rotatably connected to the gearbox 17 via bearings, and its rotation axis is horizontal and parallel to the rotation axis of the drive shaft 22. The rear end of the main drive shaft 21 extends out of the gearbox 17 for connection to a drive source. The teeth of the drive gear 22 mesh with the teeth of the main drive shaft 21, and it is rotatably connected to the gearbox 17, with its rotation axis perpendicular to the rotation axis of the main drive shaft 21. The transmission shaft 23 passes through the drive gear 22 and is fixed coaxially with it. Bevel gears 182 are fixed at both ends of the transmission shaft 23. Two driven shafts 24 are located on both sides of the transmission shaft 23 and are rotatably connected inside the gearbox 17. Their rotation axes are perpendicular to the rotation axis of the transmission shaft 23. Each driven shaft 24 is coaxially fixed with a bevel gear 181 that meshes with the second bevel gear 182. One end of the driven shaft 24 extends out of the gearbox 17. The two driven shafts 24 are set one-to-one with the two shafts 32 of the second clamping assembly 302. A universal coupling 200 is connected between the driven shaft 24 and the corresponding shaft 32. The universal coupling 200 is prior art and will not be described in detail here. For details, please refer to a feeding device disclosed in Chinese Patent Publication No. CN222552023U to realize multi-directional transmission cooperation of rotation and rotation.

[0050] The frame 1 is provided with two elongated holes 16. The length direction of the elongated holes 16 is parallel to the moving direction of the sliding seat 31 of the second clamping component 302. The two elongated holes 16 are provided one-to-one with the two rotating shafts 32 of the two second clamping components 302. The rotating shafts 32 pass through the corresponding elongated holes 16 and are confined to move within the holes.

[0051] The power source drives the main drive shaft 21 to rotate. The rotation of the main drive shaft 21 drives the active gear 22 that meshes with it to rotate. The transmission shaft 23 rotates synchronously with the active gear 22. The transmission shaft 23 drives the driven shafts 24 on both sides to rotate synchronously through the second bevel gear 182 and the first bevel gear 181. The two driven shafts 24 drive the two shafts 32 of the second clamping assembly 302 to rotate synchronously through the universal coupling 200. The two shafts 32 drive the corresponding two feeding wheels 33 to rotate. The feeding wheels 33 use surface friction to drive the pipe to be conveyed in a straight line.

[0052] The specific work process of this plan is as follows: This technical solution uses a drive motor 5 to drive a clamping component 3 directly connected to it to move along the frame 1. The clamping component 3 will drive the pivot component 43 rotatably connected to it to move. The pivot component 43 will drive one end of the swing rod 42 passing through its sleeve hole 7 to swing accordingly. The swing rod 42 will force the linkage component 41 to rotate, so that the other end of the swing rod 42 will push another pivot component 43 and the corresponding clamping component 3 to move in the opposite direction. Only a single drive input is needed to make the two clamping components 3 synchronously move closer or further away from each other, thereby symmetrically adjusting the size of the pipe channel 6 formed between them, realizing automatic centering, applying synchronous and uniform clamping force to the pipe, and improving convenience.

[0053] Example 2: See Figure 9 The difference from Embodiment 1 is that each limiting groove 14 has an inner wall with a relief cavity 15, providing additional movement space. The relief cavity 15 avoids the end of the swing rod 42, allowing the swing rod 42 to be a longer rod. When the two sliding seats 31 are close together, the end of the swing rod 42 can pass through the sleeve hole 7 and enter the relief cavity 15. When the two sliding seats 31 are far apart, the end of the swing rod 42 can slide along the sleeve hole 7 for a longer distance, thereby expanding the swing range and angle of the swing rod 42, increasing the distance between the two sliding seats 31, and obtaining a larger adjustment range of the pipe channel 6.

[0054] The foregoing has shown and described the basic principles, main features, and advantages of this technical solution. Those skilled in the art should understand that this technical solution is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this technical solution. Various changes and modifications can be made to this technical solution without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed technical solution. The scope of protection of this technical solution is defined by the appended claims and their equivalents.

Claims

1. A self-centering feeding device, characterized in that: Rack (1); A drive mechanism (2) is disposed on the frame (1); The feeding mechanism is driven by the driving mechanism (2). The feeding mechanism includes two clamping components (3) movably disposed on the frame (1) and a drive motor (5). A pipe channel (6) for pipes to pass through is formed between the two clamping components (3). The linkage mechanism (4) is located on the frame (1). The linkage mechanism (4) drives the two clamping components (3) to move away or closer to each other in a relatively synchronous manner, which is used to adjust the size of the pipe channel (6).

2. The self-centering feeding device according to claim 1, characterized in that: The linkage mechanism (4) includes a linkage member (41) rotatably mounted on the frame (1), a swing rod (42) passing through the linkage member (41), and two pivot members (43). The two pivot members (43) are rotatably connected to two clamping assemblies (3). The pivot member (43) is provided with a sleeve hole (7). The two ends of the swing rod (42) are respectively inserted into the sleeve holes (7) of the corresponding pivot members (43). When the drive motor (5) drives one of the clamping components (3) to move, the clamping component (3) drives the swing rod (42) and the linkage (41) to rotate. Through the rotational cooperation of the pivot (43), the other clamping component (3) is driven to move relative to it.

3. The self-centering feeding device according to claim 2, characterized in that: The linkage component (41) includes: Mounting base (411) is provided on the frame (1). The mounting base (411) has a connecting part (81) and a mounting part (82). The frame (1) is provided with a through hole (100). The connecting part (81) passes through the through hole (100) and the connecting part (81) has an external thread structure for threaded connection of the connecting parts. The linkage wheel (412) has a clearance hole (9) that matches the mounting part (82). The linkage wheel (412) is rotatably sleeved on the mounting part (82) through the clearance hole (9). The linkage wheel (412) is connected to the sway rod (42).

4. The self-centering feeding device according to claim 2, characterized in that: The clamping assembly (3) includes: A sliding seat (31) is provided on the frame (1), and the sliding seat (31) is movably mounted on the guide rod (10). Several rotating shafts (32) are rotatably connected to the sliding seat (31); and The feeding wheel (33) is coaxially fixed at the front end of the rotating shaft (32). The feeding wheels (33) corresponding to the two clamping components (3) rotate in coordination to clamp and transport the pipe fittings.

5. A self-centering feeding device according to claim 4, characterized in that: The feeding wheel (33) has an annular groove (11) recessed along its outer side wall.

6. The self-centering feeding device according to claim 4, characterized in that: The sliding seat (31) is provided with an assembly cavity (19) that matches the linkage (41). The cavity wall of the assembly cavity (19) is provided with a relief groove (12). The relief groove (12) is provided with a limited rotation hole (13) and a limited rotation groove (14) along the opposite groove wall. The two ends of the pivot (43) are respectively rotatably limited in the limited rotation hole (13) and the limited rotation groove (14).

7. A self-centering feeding device according to claim 6, characterized in that: The inner wall of the rotation limiting groove (14) is provided with a relief cavity (15) for avoiding the swing rod (42).

8. A self-centering feeding device according to claim 6 or 7, characterized in that: The two clamping components (3) are divided into a first clamping component (301) and a second clamping component (302). The output shaft of the drive motor (5) is connected to the sliding seat (31) of the first clamping component (301). A universal coupling (200) is provided between the drive mechanism (2) and the rotating shaft (32) of the second clamping component (302).

9. A self-centering feeding device according to claim 8, characterized in that: The frame (1) is provided with a plurality of elongated holes (16) corresponding to the rotating shaft (32) of the second clamping assembly (302), and the length direction of the elongated holes (16) is parallel to the moving direction of the second clamping assembly (302).

10. A self-centering feeding device according to claim 1, characterized in that: The frame (1) is provided with a gearbox (17), and the drive mechanism (2) is installed inside the gearbox (17). The drive mechanism (2) includes: The main drive shaft (21) is rotatably disposed within the gearbox (17) and is used to connect to the drive source; The drive gear (22) is rotatably disposed in the gearbox (17) and meshes with the main drive shaft (21); The transmission shaft (23) is coaxially fixed on the drive gear (22), and the two rotate synchronously. The transmission shaft (23) is perpendicular to the rotation axis of the main drive shaft (21). At least two driven shafts (24) are rotatably disposed within the gearbox (17), and the driven shafts (24) are perpendicular to the rotation axis of the drive shaft (23); The driven shaft (24) is fitted with a bevel gear one (181), and the end of the transmission shaft (23) is fitted with a bevel gear two (182) that meshes with the bevel gear one (181). The outer end of the driven shaft (24) is used to connect with the universal coupling (200).

Images