Rigid chuck of pipe cutting machine

Abstract

The utility model relates to the technical field of machining, in particular to a pipe cutting machine rigid chuck which comprises a chuck device which comprises a frame body, a chuck body, two clamping jaws, a first oil cylinder and a transmission assembly. The transmission assembly comprises a first sliding block, a second sliding block, a third sliding block, a first crank arm connected with the first sliding block and the third sliding block and a second crank arm connected with the second sliding block and the third sliding block, the two clamping jaws are fixedly connected with the first sliding block and the second sliding block respectively, and the output end of the first oil cylinder is fixedly connected with the third sliding block. One oil cylinder is used for controlling the two clamping jaws to move face to face or back to back at the same time, clamping and releasing are achieved, the overall structure is simple, the synchronization precision of the two clamping jaws is high, and the clamping speed is high. The automatic tightness adjustment of the clamping jaws is controlled by the oil cylinder, the clamping force and amplitude are adjustable and controllable, the device can adapt to steel pipes with different diameters, operation and use are convenient, vibration and deformation in the machining process can be effectively reduced, and the machining quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to a rigid chuck of a pipe cutting machine. Background Art

[0002] The pipe cutting machine is a device used to cut pipes. The rigid chuck is one of the core components of the pipe cutting machine, which is mainly used to fix and position the pipe. The structural form of the rigid chuck directly affects the clamping speed, the synchronization accuracy of the clamping jaws, the clamping stability and the ease of operation.

[0003] There are various drawbacks in the chucks currently on the market. For example, the transmission structure is not ideal, resulting in low clamping accuracy, and the rigid chuck has a complex structure, resulting in relatively complex installation and debugging. For example, the electric chuck has a slow clamping speed and a high motor damage rate.

[0004] Therefore, it is necessary to propose an improvement to overcome the defects of the prior art. Utility Model Content

[0005] The utility model aims to solve the problems in the prior art and provide a rigid chuck for a pipe cutting machine which has high clamping accuracy, fast clamping speed and convenient operation.

[0006] The technical solution of the utility model is:

[0007] A rigid chuck of a pipe cutting machine comprises a chuck device, wherein the chuck device comprises a frame, a chuck body fixed on the frame, two claws, a first oil cylinder fixed on the chuck body and a transmission assembly arranged inside the chuck body, the two claws and the first oil cylinder are connected through the transmission assembly, the chuck body is provided with a clamping area for accommodating a workpiece to be clamped at the position of a machining main axis, the two claws are symmetrically arranged along the center of the clamping area, the transmission assembly comprises a first slider, a second slider symmetrically arranged with the first slider about the machining main axis, a third slider, a first crank arm connecting the first slider and the third slider, a second crank arm connecting the second slider and the third slider, a slideway respectively matched with the first slider, the second slider and the third slider is provided in the chuck body, the two claws are respectively fixedly connected to the first slider and the second slider, and the output end of the first oil cylinder is fixedly connected to the third slider.

[0008] The first oil cylinder is extended to drive the third slider to move, the third slider drives the first crank arm and the second crank arm to move, and the first crank arm and the second crank arm drive the first slider and the second slider to move, so as to achieve the clamping and loosening of the claws. One oil cylinder controls two claws at the same time, and the two claws have high synchronization accuracy, fast clamping speed and convenient operation.

[0009] As a preferred technical solution, a first curved waist-shaped hole is provided on the third slider close to the first crank arm, a second curved waist-shaped hole is provided on the third slider close to the second crank arm, a first groove and a second groove are provided on the first slider respectively, one end of the first crank arm extends into the first groove, and the other end is connected to the first waist-shaped hole through a movable connecting piece, one end of the second crank arm extends into the second groove, and the other end is connected to the second waist-shaped hole through a movable connecting piece.

[0010] As a preferred technical solution, the first slider and the second slider are respectively provided with limit holes for limiting the movement of the first slider and the second slider, and a limit rod is provided in the limit hole, and the limit rod is fixed relative to the chuck body. The clamping claw moves toward or away from the first slider to achieve clamping and loosening, and can adapt to steel pipes of different diameters.

[0011] As a further preferred technical solution, the first crank arm and the second crank arm are L-shaped, and the first crank arm and the second crank arm are rotatably connected to the frame through a pin shaft.

[0012] As a preferred technical solution, the chuck body is provided with a proximity switch and a signal transmitting block for detecting the starting and ending positions of the oil cylinder.

[0013] As a preferred technical solution, the rigid chuck of the pipe cutting machine also includes a locking device, the chuck device is slidably connected to the locking device, and the locking device includes a second oil cylinder, a sliding clamping shaft and a support seat, the second oil cylinder is fixed on the support seat, one end of the sliding clamping shaft is sleeved on the frame, and the other end of the sliding clamping shaft is connected to the output end of the second oil cylinder. When the second oil cylinder retracts, it drives the sliding clamping shaft to brake the frame and the support seat to ensure safety.

[0014] As a further preferred technical solution, two second oil cylinders and two sliding clamping shafts are symmetrically arranged along the main processing axis. The left-right symmetrical arrangement allows for uniform force, making the brake more effective and the chuck device more stable.

[0015] As a preferred technical solution, the two clamping claws are respectively connected to the first slider and the second slider by screws. After the clamping claws are worn out after long-term use, they can be easily disassembled and replaced.

[0016] As a further preferred technical solution, the surface of the clamping claw in contact with the workpiece is provided with an anti-skid groove to avoid slipping when clamping the workpiece, making the workpiece clamping more stable and ensuring the processing accuracy.

[0017] The beneficial effects of the utility model are as follows:

[0018] The utility model discloses a rigid chuck for a pipe cutting machine, which realizes clamping and releasing by controlling the movement of two clamping jaws toward or away from each other through an oil cylinder at the same time. The overall structure is simple, the two clamping jaws have high synchronization accuracy and fast clamping speed. The automatic tightness adjustment of the clamping jaws is controlled by the oil cylinder, and the clamping force and amplitude are adjustable and controllable, which can adapt to steel pipes of different diameters, is easy to operate and use, can effectively reduce vibration and deformation during processing, and improve processing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view of the rigid chuck of the pipe cutting machine of the utility model;

[0020] Figure 2 This is a left view of the rigid chuck of the pipe cutting machine of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the chuck device of the utility model;

[0022] Figure 4 For this utility model Figure 3 Middle A-direction view;

[0023] Among them, 1. claw; 2. first slider; 3. limit hole; 4. limit rod; 5. first groove; 6. first crank arm; 7. third slider; 8. first waist-shaped hole; 9. first oil cylinder; 10. second slider; 11. second groove; 12. second crank arm; 13. second waist-shaped hole; 14. proximity switch; 15. signal block; 16. frame; 17. second oil cylinder; 18. sliding clamping shaft; 19. support seat; 20. pin shaft. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] like Figure 1-3 As shown, a rigid chuck of a pipe cutting machine in this embodiment includes a chuck device and a locking device, and the chuck device is slidably connected to the locking device.

[0028] The chuck device comprises a frame 16, a chuck body, two clamping jaws 1, a first oil cylinder 9 and a transmission assembly, and the two clamping jaws 1 and the first oil cylinder 9 are connected through the transmission assembly.

[0029] The chuck body is fixed on the frame 16. The chuck body is provided with a clamping area for accommodating the workpiece to be clamped at the position of the main axis of the machining. The two clamping jaws 1 are symmetrically arranged along the center of the clamping area. The surfaces of the two clamping jaws 1 contacting the workpiece are provided with anti-slip grooves to increase the friction between the clamping jaws 1 and the steel pipe, thereby ensuring that the steel pipe is clamped safely and stably.

[0030] The transmission assembly includes a first slider 2, a second slider 10 symmetrically arranged with the first slider 2 about the machining main axis, a third slider 7, a first crank arm 6, and a second crank arm 12. The chuck body is provided with slideways respectively matched with the first slider 2, the second slider 10, and the third slider 7. The two claws 1 are respectively connected with the first slider 2 and the second slider 10 by screws, and the output end of the first oil cylinder 9 is fixedly connected with the third slider 7. The first crank arm 6 and the second crank arm 12 are L-shaped, and the first crank arm 6 and the second crank arm 12 are rotatably connected to the frame 16 by a pin 20.

[0031] A curved first waist-shaped hole 8 is provided on the third slider 7 near the first crank arm 6, a first groove 5 capable of accommodating the first crank arm 6 is provided on the first slider 2, one end of the first crank arm 6 extends into the first groove 5, and the other end is connected to the first waist-shaped hole 8 through a movable connecting member. A curved second waist-shaped hole 13 is provided on the third slider 7 near the second crank arm 12, a second groove 11 capable of accommodating one end of the second crank arm 12 is provided on the second slider 10, one end of the second crank arm 12 extends into the second groove 11, and the other end is connected to the second waist-shaped hole 13 through a movable connecting member.

[0032] The first slider 2 and the second slider 10 are respectively provided with limiting holes 3 for limiting the moving stroke of the first slider 2 and the second slider 10 . A limiting rod 4 is arranged in the limiting hole 3 . The limiting rod 4 is fixed relative to the chuck body.

[0033] The locking device includes two second oil cylinders 17, two sliding clamping shafts 18 and a support seat 19. The two second oil cylinders 17 are fixed on the support seat 19. One end of the two sliding clamping shafts 18 is sleeved on the frame 16, and the other end is connected to the output end of the second oil cylinder 17. The two second oil cylinders 17 and the two sliding clamping shafts 18 are symmetrically arranged along the main axis of the processing. The setting of the locking device enables the chuck device to not only provide accurate positioning and clamping during the processing process, but also maintain stability during the clamping process of the workpiece to prevent the workpiece from shifting due to external factors.

[0034] like Figure 4 As shown, a proximity switch 14 and a signaling block 15 for detecting the starting and ending positions of the oil cylinder are provided on the chuck body.

[0035] Working principle: The first oil cylinder 9 extends to drive the third slider 7 to move. The first crank arm 6 and the second crank arm 12 move along the trajectory of the first waist-shaped hole 8 and the second waist-shaped hole 13 respectively with the movement of the third slider 7. The first crank arm 6 drives the first slider 2 to move toward the main axis of processing. The second crank arm 12 drives the second slider 7 to move toward the main axis of processing. The two claws 1 move toward each other under the drive of the first slider 2 and the second slider 7 to clamp the steel pipe. The first oil cylinder 9 retracts, the first crank arm 6 and the second crank arm 12 drive the first slider 2 and the second slider 7 to move in opposite directions, and the two claws 1 release the steel pipe and return to the original position. The second oil cylinder 17 retracts, driving the sliding clamping shaft 18 to brake the frame 16 and the support seat 19.

[0036] The above description is only a preferred embodiment of the utility model, and is not intended to limit the scope of implementation of the utility model. That is, all equivalent changes and modifications made according to the content of the patent application scope of the utility model should belong to the technical scope of the utility model.

Claims

1. A rigid chuck for a pipe cutting machine, characterized in that: The invention comprises a chuck device, the chuck device comprising a frame (16), a chuck body fixed on the frame (16), two clamping claws (1), a first oil cylinder (9) fixed on the chuck body and a transmission assembly arranged inside the chuck body, the two clamping claws (1) and the first oil cylinder (9) being connected via the transmission assembly, the chuck body being provided with a clamping area for accommodating a workpiece to be clamped at the position of the machining main axis, the two clamping claws (1) being symmetrically arranged along the center of the clamping area, the transmission assembly comprising a first slide block (2), a first slide block (2) and a second slide block (3) connected to the first slide block (2) A second slider (10), a third slider (7), a first crank arm (6) connecting the first slider (2) and the third slider (7), and a second crank arm (12) connecting the second slider (10) and the third slider (7) are symmetrically arranged about the machining main axis; a slideway is arranged in the chuck body and is respectively matched with the first slider (2), the second slider (10), and the third slider (7); two claws (1) are respectively fixedly connected to the first slider (2) and the second slider (10); and an output end of the first oil cylinder (9) is fixedly connected to the third slider (7).

2. A rigid chuck for a pipe cutting machine according to claim 1, characterized in that: A first curved waist-shaped hole (8) is provided on the third slider (7) on a side close to the first crank arm (6), and a second curved waist-shaped hole (13) is provided on the third slider (7) on a side close to the second crank arm (12). A first groove (5) and a second groove (11) are provided on the first slider (2) and the second slider (10) respectively. One end of the first crank arm (6) extends into the first groove (5), and the other end is connected to the first waist-shaped hole (8) through a movable connecting member. One end of the second crank arm (12) extends into the second groove (11), and the other end is connected to the second waist-shaped hole (13) through a movable connecting member.

3. A rigid chuck for a pipe cutting machine according to claim 1, characterized in that: The first slider (2) and the second slider (10) are respectively provided with a limit hole (3) for limiting the moving stroke of the first slider (2) and the second slider (10), and a limit rod (4) is arranged in the limit hole (3), and the limit rod (4) is fixedly arranged relative to the chuck body.

4. A rigid chuck for a pipe cutting machine according to claim 1, characterized in that: The first crank arm (6) and the second crank arm (12) are L-shaped, and the first crank arm (6) and the second crank arm (12) are rotatably connected to the frame body (16) via a pin shaft (20).

5. A rigid chuck for a pipe cutting machine according to claim 1, characterized in that: The chuck body is provided with a proximity switch (14) and a signaling block (15) for detecting the starting and ending positions of the oil cylinder.

6. A rigid chuck for a pipe cutting machine according to claim 1, characterized in that: The rigid chuck of the pipe cutting machine also includes a locking device, the chuck device is slidably connected to the locking device, and the locking device includes a second oil cylinder (17), a sliding clamping shaft (18) and a support seat (19). The second oil cylinder (17) is fixed on the support seat (19), one end of the sliding clamping shaft (18) is sleeved on the frame (16), and the other end of the sliding clamping shaft (18) is connected to the output end of the second oil cylinder (17).

7. A rigid chuck for a pipe cutting machine according to claim 6, characterized in that: Two of the second oil cylinders (17) and the sliding clamping shafts (18) are symmetrically arranged along the machining main axis.

8. A rigid chuck for a pipe cutting machine according to any one of claims 1 to 7, characterized in that: The two clamping claws (1) are respectively connected to the first sliding block (2) and the second sliding block (10) via screws.

9. A rigid chuck for a pipe cutting machine according to claim 8, characterized in that: The surface of the clamping claw (1) in contact with the workpiece is provided with an anti-slip groove.

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