Pipe clamp device for a pipe bender

Abstract

The utility model discloses a pipe clamp device for pipe bender belongs to steel pipe processing equipment technical field, including moving mechanism, and install drive mechanism and clamping mechanism on moving mechanism, and clamping mechanism is transmission connection with drive mechanism, and clamping mechanism includes pipe axle, clamping jaw subassembly, connecting sleeve and drive assembly, and pipe axle rotates and cooperates on drive mechanism, and clamping jaw subassembly installs in pipe axle front end and middle part and communicates with pipe axle, and drive assembly installs in pipe axle rear end, and connecting sleeve is movably sleeved on pipe axle, and the front end of connecting sleeve is matched with clamping jaw subassembly, and rear end is matched with drive assembly, and be equipped with the elastic member on clamping jaw subassembly and make it keep open state under normality, still be equipped with the inclined guide surface for urging clamping jaw subassembly to close tightly, through connecting sleeve relative pipe axle moves forward and backward, and cooperate the elastic member and guide surface on clamping jaw subassembly, have realized the automatic open and close tightly of clamping jaw subassembly, have solved the problem that pipe fitting is difficult to insert or take out in the prior art, and improved production efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of steel pipe processing equipment, and in particular to a pipe clamp device for a pipe bending machine. Background Technology

[0002] Pipe bending machines are widely used in furniture, decoration, and other fields, primarily for the precise bending of steel pipes. During operation, the stable clamping of the pipe is crucial for ensuring bending accuracy and forming quality. Existing technology, such as the automatic pipe bending machine disclosed in Chinese Patent Publication No. CN202420052905.2, uses a clamping device in the feeding assembly to clamp the pipe for subsequent bending operations. This clamping device includes an enlarged section with four equidistant expansion joints on its outer edge. The expansion section is compressed by a compression cylinder, causing the expansion joints to shrink, thereby reducing the size of the clamp and achieving the purpose of clamping the pipe.

[0003] However, the clamping device described in the aforementioned patent still has some drawbacks in practical applications. First, the device is relatively difficult to insert and remove, especially when handling larger or thicker pipes. Due to the large deformation of the enlarged part of the clamp after compression, i.e., the large pre-tightening force, it is difficult to insert or remove the pipe smoothly, thus reducing production efficiency.

[0004] Secondly, the clamping force of the pipe clamp is not adjustable. Once the pipe clamp is tightened, the clamping force remains fixed and cannot be flexibly adjusted according to the material, wall thickness, and other characteristics of the pipe. This may cause the pipe to be damaged due to excessive clamping force during bending, or the pipe to slip due to insufficient clamping force, affecting the bending accuracy. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a pipe clamping device for a pipe bending machine to solve the problems of relatively difficult pipe insertion and removal, as well as the problem of non-adjustable clamping force.

[0006] A pipe clamping device for a pipe bending machine includes a moving mechanism, a driving mechanism and a clamping mechanism mounted on the moving mechanism, wherein the clamping mechanism is pulsatorically connected to the driving mechanism.

[0007] The clamping mechanism includes a tube shaft, a gripper assembly, a connecting sleeve, and a drive assembly. The tube shaft is rotatably fitted onto the drive assembly. The gripper assembly is installed at the front end of the tube shaft and communicates with the tube shaft in the middle. The drive assembly is installed at the rear end of the tube shaft. The connecting sleeve is movably fitted onto the tube shaft. The front end of the connecting sleeve cooperates with the gripper assembly, and the rear end cooperates with the drive assembly.

[0008] The gripper assembly is provided with an elastic element to keep it in an open state under normal conditions, and also has an inclined guide surface. The front end of the connecting sleeve slides against the guide surface. When the drive assembly drives the connecting sleeve to move back and forth relative to the tube shaft, the gripper assembly is tightened through the guide surface.

[0009] Furthermore, the side wall of the connecting sleeve is provided with a limiting hole, and a limiting pin is used to pass through the limiting hole and be fixedly connected to the tube shaft so that the connecting sleeve rotates with the tube shaft, and the limiting hole extends along the axial direction so that the connecting sleeve can move back and forth relative to the tube shaft.

[0010] In this utility model, the clamping mechanism further includes an adjusting sleeve, which is adjustablely connected to the front end of the connecting sleeve, and its front end fits on the guide surface.

[0011] Furthermore, the inner edge of the front end of the adjusting sleeve is chamfered, and the chamfered plane cooperates with the guide surface; the adjusting sleeve is connected to the connecting sleeve by a threaded connection, the outer surface of the front end of the connecting sleeve is provided with an external thread, and the inner surface of the rear end of the adjusting sleeve is provided with an internal thread that cooperates with the external thread. Rotating the adjusting sleeve can change its relative length, thereby changing the initial position of pressing against the guide surface to adjust the preload.

[0012] In this utility model, the gripper assembly includes a mounting head and at least two sets of gripping arms. The mounting head has a stepped shaft structure and a through hole that runs through the front and rear of the middle. The mounting head includes an outer shaft part and an inner shaft part. The diameter of the outer shaft part is larger than the diameter of the inner shaft part. After the mounting head is connected to the tube shaft, the through hole communicates with the tube shaft.

[0013] One end of the clamping arm is hinged to the outer shaft of the mounting head, and the other end extends forward to the front end of the inner shaft for clamping the pipe. The elastic element is installed on the inner shaft and abuts against the inner side of the clamping arm, which normally opens the clamping arm outward. The guide surface is located on the outer side of the clamping arm.

[0014] Furthermore, a clamping toe is detachably installed on the inner side of the front end of the clamping arm. The inner side of the clamping toe is provided with an arc-shaped clamping surface. The clamping surface fits against the outer wall of the pipe fitting. When replacing pipe fittings of different diameters, the clamping toe with the corresponding arc can be replaced.

[0015] In this invention, the driving assembly includes a driver, a driving seat, and a driving arm. The driver is mounted on the side of the connecting sleeve, and the driving seat is mounted on the rear of the connecting sleeve. The driving arm has a fork-shaped structure, with one end of the double handles hinged to the driving seat, and one end of the single handle deflected towards the driver and hinged to the driving end of the driver. Guide blocks are respectively provided in the middle of the driving arm and above and below the connecting sleeve. The guide blocks are rotatably connected to the driving arm. The rear end of the connecting sleeve is provided with a guide groove that surrounds the entire shaft. The two guide blocks slide in the guide groove. When the driver drives the driving arm to rotate around the driving seat, the guide blocks drive the connecting sleeve to move back and forth relative to the tube shaft through the guide groove.

[0016] In this utility model, the moving mechanism includes two parallel guide rails, a slider that slides on the parallel guide rails, a carrying plate mounted on the slider, and a first drive motor connected to the carrying plate. The first drive motor drives the carrying plate to move along the guide rails, and the first drive motor and the carrying plate are driven by a screw transmission mechanism.

[0017] Furthermore, the drive mechanism includes a rotating seat mounted on the carrier plate, in which the tube shaft is rotatably fitted, and a second drive motor mounted on the rotating seat for driving the tube shaft to rotate, wherein the second drive motor and the tube shaft are driven by a synchronous belt.

[0018] The beneficial effects of this utility model are:

[0019] This utility model discloses a pipe clamping device for a pipe bending machine. By moving the connecting sleeve back and forth relative to the pipe shaft, and cooperating with the elastic element and guide surface on the clamping jaw assembly, the automatic opening and closing of the clamping jaw assembly is achieved. This solves the problem of pipe fittings being difficult to insert or remove smoothly in the prior art, thus improving production efficiency. At the same time, by setting an adjusting sleeve and adopting a threaded connection, the pre-tightening degree of the clamping jaw assembly can be flexibly adjusted, thereby adjusting the clamping force on the pipe fitting. This avoids the problem of pipe fittings being damaged due to excessive clamping force or pipe fittings sliding due to insufficient clamping force, which affects bending accuracy. It is convenient to make flexible adjustments according to the material, wall thickness, and other characteristics of the pipe fitting, thus improving the practicality and reliability of the device. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a schematic diagram of the pipe bending machine in this embodiment;

[0022] Figure 2 This is a schematic diagram of the pipe clamp device in this embodiment;

[0023] Figure 3This is a partial disassembly diagram of the pipe clamp device in this embodiment;

[0024] Figure 4 This is a partial disassembly diagram of the clamping mechanism in this embodiment;

[0025] Figure 5 This is a schematic diagram of the gripper assembly in this embodiment;

[0026] The attached figures are labeled as follows: frame 1, pipe bending device 2, pipe clamping device 3, moving mechanism 31, driving mechanism 32, clamping mechanism 33, pipe shaft 331, gripper assembly 332, connecting sleeve 333, driving assembly 334, adjusting sleeve 335, limiting hole 3331, limiting pin 3332, elastic element 3321, guide surface 3322, mounting head 3323, clamping arm 3324, outer shaft part 3325, inner shaft part 3326, gripper toe 3327, clamping surface 3328, driver 3341, drive seat 3342, drive arm 3343, guide block 3344, parallel guide rail 311, slider 312, carrier plate 313, first drive motor 314, lead screw transmission mechanism 315, rotating seat 321, second drive motor 322. Detailed Implementation

[0027] This utility model provides a pipe clamping device for a pipe bending machine. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0028] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] Please see Figures 1 to 5 :

[0030] This embodiment discloses a pipe clamping device for a pipe bending machine. The pipe bending machine includes a frame 1 and a pipe bending device 2 installed at the front end of the frame 1. The pipe clamping device 3 is movably installed on the top of the frame 1. The pipe clamping device 3 includes a moving mechanism 31 installed on the frame 1, a driving mechanism 32 and a clamping mechanism 33 installed on the moving mechanism 31. The clamping mechanism 33 is connected to the driving mechanism 32. The clamping mechanism 33 is used to clamp the pipe fitting. The moving mechanism 31 is used to drive the pipe fitting to move in the front-back direction. The driving mechanism 32 is used to drive the pipe fitting on the clamping mechanism 33 to rotate around its own axis. The mechanism 33 includes a tube shaft 331, a gripper assembly 332, a connecting sleeve 333, and a drive assembly 334. The tube shaft 331 is a tubular structure and is rotatably fitted onto the drive mechanism 32. The gripper assembly 332 is installed at the front end of the tube shaft 331 and has an opening in its middle communicating with the tube shaft 331 so that a tube can be inserted through the opening. The drive assembly 334 is fixed on the moving mechanism 31 and located at the rear end of the tube shaft 331. The connecting sleeve 333 is movably fitted onto the tube shaft 331. The front end of the connecting sleeve 333 engages with the gripper assembly 332, and the rear end engages with the drive assembly 334. The side of the connecting sleeve 333... The wall is also provided with a limiting hole 3331. After the connecting sleeve 333 is installed, a limiting pin 3332 passes through the limiting hole 3331 and is fixedly connected to the tube shaft 331, so that the connecting sleeve 333 can rotate with the tube shaft 331. In addition, the limiting hole 3331 extends along the axial direction, so that the connecting sleeve 333 can also move back and forth relative to the tube shaft 331. Furthermore, the gripper assembly 332 is provided with an elastic element 3321. The elastic element 3321 keeps the gripper assembly 332 in an open state under normal conditions. The gripper assembly 332 is also provided with an inclined guide surface 3322. The guide surface 3322 is used for... The clamping jaw assembly 332 is tightened by sliding the front end of the connecting sleeve 333 against the guide surface 3322. When the driving assembly 334 drives the connecting sleeve 333 to move forward relative to the tube shaft 331, the front end of the connecting sleeve 333 drives the clamping jaw assembly 332 to tighten through the guide surface 3322, thereby clamping the tube. When the driving assembly 334 drives the connecting sleeve 333 to move backward relative to the tube shaft 331, the clamping jaw assembly 332, in conjunction with the elastic element 3321, resets and opens. This allows for easy removal of the processed tube and facilitates the insertion of the next tube to be processed, improving work efficiency.

[0031] like Figure 3 and Figure 4As shown, to facilitate adjustment of the clamping force, the clamping mechanism 33 further includes an adjusting sleeve 335. The adjusting sleeve 335 is adjustablely connected to the front end of the connecting sleeve 333. The front end of the adjusting sleeve 335 mates with the guide surface 3322. To reduce friction, a chamfer is provided on the inner edge of the front end of the adjusting sleeve 335, and the adjusting sleeve 335 mates with the guide surface 3322 through the chamfered plane. In this embodiment, the adjusting sleeve 335 preferably mates with the connecting sleeve 333 by means of a threaded connection. Specifically, an external thread is provided on the outer surface of the front end of the connecting sleeve 333, and an internal thread that mates with the external thread is provided on the inner surface of the rear end of the adjusting sleeve 335. The relative length of the adjusting sleeve 335 can be changed by rotating it, that is, the initial position of the adjusting sleeve 335 pressing against the guide surface 3322 can be changed, thereby changing the pre-tightening degree. When the adjusting sleeve 335 is rotated outward, the length of the adjusting sleeve 335 increases relatively, which increases the pre-tightening force of the gripper assembly 332. After the gripper assembly 332 is tightened, the clamping force on the pipe is increased. When the adjusting sleeve 335 is rotated inward, the length of the adjusting sleeve 335 decreases relatively, which decreases the pre-tightening force on the gripper assembly 332. After the gripper assembly 332 is tightened, the clamping force on the pipe is decreased. This allows for flexible adjustment of the clamping force and facilitates use.

[0032] like Figure 5 As shown, the gripper assembly 332 includes a mounting head 3323 and at least two sets of gripping arms 3324. The mounting head 3323 has a stepped shaft structure and a through hole running through the center. The mounting head 3323 includes an integrally formed or separately formed outer shaft portion 3325 and an inner shaft portion 3326. The diameter of the outer shaft portion 3325 is larger than the diameter of the inner shaft portion 3326. After the mounting head 3323 is connected to the tube shaft 331, its through hole communicates with the tube shaft 331. One end of each gripping arm 3324 is hinged to the mounting head 3323. On the outer shaft portion 3325 of the head 3323, the other end extends forward to the front end of the inner shaft portion 3326 for clamping the pipe. The elastic element 3321 is installed on the inner shaft portion 3326 and abuts against the inner side of the clamping arm 3324. Under normal conditions, the elastic element 3321 pushes the clamping arm 3324 outward, while the guide surface 3322 is provided on the outer side of the clamping arm 3324. In addition, this embodiment preferably provides three sets of clamping arms 3324, and the three sets of clamping arms 3324 are evenly distributed around the axial direction of the mounting head 3323.

[0033] Furthermore, to improve the clamping effect of the clamping arm 3324 on the pipe fitting, a clamping toe 3327 is detachably installed at the front end of the clamping arm 3324. The clamping toe 3327 is specifically fixed to the inner side of the clamping arm 3324 by bolt connection. At the same time, the inner side of the clamping toe 3327 is provided with an arc-shaped clamping surface 3328. The clamping surface 3328 fits against the outer wall of the pipe clamp. When changing pipe fittings of different diameters, the clamping toe 3327 with the corresponding arc can be replaced to ensure the fit between the clamping surface 3328 and the surface of the pipe fitting, thereby improving the clamping effect.

[0034] Furthermore, the drive assembly 334 includes a driver 3341, a drive seat 3342, and a drive arm 3343. The driver 3341 is mounted on the side of the connecting sleeve 333, and the drive seat 3342 is mounted on the rear of the connecting sleeve 333. The drive arm 3343 has a fork-shaped structure and is connected between the driver 3341 and the drive seat 3342. Specifically, one end of the double-handled drive arm 3343 is hinged to the drive seat 3342, and one end of the single-handled drive arm is deflected towards the driver 3341 and hinged to the drive end of the driver 3341. The drive arm 3343 also has a drive arm located in the middle and above and below the connecting sleeve 333. Guide block 3344 is rotatably connected to drive arm 3343. Drive arm 3343 cooperates with connecting sleeve 333 through guide block 3344. Specifically, a guide groove 3333 is provided around the rear end of connecting sleeve 333. Two guide blocks 3344 are slidably engaged in the guide groove 3333. When the driver 3341 drives drive arm 3343 to rotate around drive seat 3342 as fulcrum, guide block 3344 on drive arm 3343 drives connecting sleeve 333 to move back and forth relative to tube shaft 331 through guide groove 3333. Driver 3341 is a telescopic cylinder.

[0035] In this embodiment, as Figure 3 As shown, the moving mechanism 31 includes two parallel guide rails 311, a slider 312 that slides on the parallel guide rails 311, a carrying plate 313 mounted on the slider 312, and a first drive motor 314 connected to the carrying plate 313. The first drive motor 314 drives the carrying plate 313 to move along the parallel guide rails 311. The first drive motor 314 and the carrying plate 313 are transmitted by a screw drive mechanism 315. The screw drive mechanism 315 is existing technology, and its specific structure and working principle will not be described in detail.

[0036] Furthermore, the drive mechanism 32 includes a rotating seat 321 mounted on the carrier plate 313, the tube shaft 331 is rotatably fitted in the rotating seat 321, and a second drive motor 322 mounted on the rotating seat 321 for driving the tube shaft 331 to rotate. The second drive motor 322 and the tube shaft 331 are driven by a synchronous belt. Specifically, synchronous pulleys are respectively set on the drive end of the second drive motor 322 and the tube shaft 331, and the synchronous belt is sleeved on the two sets of synchronous pulleys for transmission. The synchronous belt transmission method can achieve precise control of the angle, thereby precisely controlling the rotation angle of the tube.

[0037] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of the present invention.

Claims

1. A tube clamping device for a tube bender, characterized in that It includes a moving mechanism, and a driving mechanism and a clamping mechanism mounted on the moving mechanism, wherein the clamping mechanism is drively connected to the driving mechanism; The clamping mechanism includes a tube shaft, a gripper assembly, a connecting sleeve, and a drive assembly. The tube shaft is rotatably fitted onto the drive assembly. The gripper assembly is installed at the front end of the tube shaft and communicates with the tube shaft in the middle. The drive assembly is installed at the rear end of the tube shaft. The connecting sleeve is movably fitted onto the tube shaft. The front end of the connecting sleeve cooperates with the gripper assembly, and the rear end cooperates with the drive assembly. The gripper assembly is provided with an elastic element to keep it in an open state under normal conditions, and also has an inclined guide surface. The front end of the connecting sleeve slides against the guide surface. When the drive assembly drives the connecting sleeve to move back and forth relative to the tube shaft, the gripper assembly is tightened through the guide surface.

2. A tube clamping device for a tube bender as defined in claim 1, characterized in that The side wall of the connecting sleeve is provided with a limiting hole. A limiting pin passes through the limiting hole and is fixedly connected to the tube shaft so that the connecting sleeve rotates with the tube shaft. The limiting hole extends along the axial direction so that the connecting sleeve can move back and forth relative to the tube shaft.

3. A pipe clamp apparatus for a pipe bender as defined in claim 1 wherein, The clamping mechanism also includes an adjusting sleeve, which is adjustablely connected to the front end of the connecting sleeve, and its front end fits on the guide surface.

4. A pipe clamping device for a pipe bending machine according to claim 3, characterized in that, The inner edge of the front end of the adjusting sleeve is chamfered, and the chamfered plane cooperates with the guide surface. The adjusting sleeve is connected to the connecting sleeve by a threaded connection. The outer surface of the front end of the connecting sleeve is provided with an external thread, and the inner surface of the rear end of the adjusting sleeve is provided with an internal thread that cooperates with the external thread. Rotating the adjusting sleeve can change its relative length, thereby changing the initial position of pressing against the guide surface to adjust the preload.

5. A pipe clamp apparatus for a pipe bender as defined in claim 1, wherein, The gripper assembly includes a mounting head and at least two sets of gripping arms. The mounting head has a stepped shaft structure and a through hole in the middle. The mounting head includes an outer shaft part and an inner shaft part. The diameter of the outer shaft part is larger than the diameter of the inner shaft part. After the mounting head is connected to the tube shaft, the through hole communicates with the tube shaft. One end of the clamping arm is hinged to the outer shaft of the mounting head, and the other end extends forward to the front end of the inner shaft for clamping the pipe. The elastic element is installed on the inner shaft and abuts against the inner side of the clamping arm, which normally opens the clamping arm outward. The guide surface is located on the outer side of the clamping arm.

6. A tube clamping device for a tube bender as defined in claim 5, characterized in that The inner side of the front end of the clamping arm is detachably equipped with a clamping toe. The inner side of the clamping toe is provided with an arc-shaped clamping surface. The clamping surface fits against the outer wall of the pipe. When changing pipes of different diameters, the clamping toe with the corresponding arc can be replaced.

7. A pipe clamp apparatus for a pipe bender as defined in claim 1, wherein, The drive assembly includes a driver, a drive base, and a drive arm. The driver is mounted on the side of the connecting sleeve, and the drive base is mounted on the rear of the connecting sleeve. The drive arm has a fork-shaped structure, with one end of the double handles hinged to the drive base, and one end of the single handle deflected towards the driver and hinged to the drive end of the driver. Guide blocks are respectively provided in the middle of the drive arm, above and below the connecting sleeve. The guide blocks are rotatably connected to the drive arm. The rear end of the connecting sleeve has a guide groove that surrounds the entire shaft. The two guide blocks slide within the guide groove. When the driver drives the drive arm to rotate around the drive base, the guide blocks drive the connecting sleeve to move back and forth relative to the tube shaft through the guide groove.

8. A pipe clamp apparatus for a pipe bender as defined in claim 1, wherein, The moving mechanism includes two parallel guide rails, a slider that slides on the parallel guide rails, a carrier plate mounted on the slider, and a first drive motor connected to the carrier plate. The first drive motor drives the carrier plate to move along the guide rails, and the first drive motor and the carrier plate are driven by a screw transmission mechanism.

9. A tube clamping device for a tube bender as defined in claim 8, characterized in that The drive mechanism includes a rotating seat mounted on a carrier plate, in which the tube shaft is rotatably fitted. It also includes a second drive motor mounted on the rotating seat for driving the tube shaft to rotate, and the second drive motor and the tube shaft are driven by a synchronous belt.

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