Automatic clamping device for tubular workpiece

Abstract

The utility model discloses an automatic clamping device for tubular workpieces. The automatic clamping device comprises a headstock base provided with a positioning sleeve, a clamping assembly and a control assembly used for controlling the clamping assembly. The clamping assembly comprises a clamping jaw support and clamping jaws, the clamping jaw support is coaxially and rotationally connected with the positioning sleeve, and the multiple clamping jaws are evenly distributed on the clamping jaw support in the circumferential direction and can slide in the radial direction of the clamping jaw support. The control assembly comprises a sliding part and a rotating part. The sliding part comprises a sliding sleeve which is arranged on the positioning sleeve and can slide in the axial direction of the positioning sleeve and a push-pull mechanism used for driving the sliding sleeve to slide. The rotating part comprises a pusher dog support and pusher dogs, the pusher dog support is rotationally connected with the sliding sleeve and can rotate around the axis of the positioning sleeve, the pusher dogs are evenly distributed on the pusher dog support in the circumferential direction, the number of the pusher dogs is the same as that of the clamping dogs, the pusher dogs are matched with the clamping dogs, and the clamping dogs can be separated or gathered by sliding the sliding sleeve. By means of the clamping device, the technical problems that an existing clamping device needs manual clamping, clamping is not firm, and universality is poor can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing equipment, in particular to an automatic clamping device for tubular workpieces. Background Art

[0002] This machine, used to harden straight pipes used in concrete pump trucks, uses a transformer to drive the movement of internal and external sensors, scanning and heating the supported and compressed pump pipe. While highly adaptable, it can harden a wide range of pump pipe types. However, it presents several challenges with clamping tubular workpieces.

[0003] Conventional technology clamps tubular workpieces by manually opening and closing a split central upper and lower retaining sleeve. This system has several drawbacks: First, it's prone to slippage and requires manual tightening and loosening. Second, clamping workpieces of varying diameters requires replacing the central retaining sleeve with a different diameter. Manually removing and replacing the retaining sleeve is time-consuming, leading to low quenching efficiency. Furthermore, unstable clamping also hinders efficient production. Summary of the Invention

[0004] The utility model aims to provide an automatic clamping device for tubular workpieces, which can solve the technical problems of existing clamping equipment that require manual clamping, the clamping is not firm and the versatility is poor.

[0005] In order to achieve the above-mentioned purpose, the present utility model adopts the following technical solutions.

[0006] An automatic clamping device for tubular workpieces comprises a headstock base provided with a positioning sleeve, a clamping assembly for clamping the tubular workpiece, and a control assembly for controlling the clamping assembly to clamp or release the tubular workpiece.

[0007] The clamping assembly includes a claw support and multiple claws arranged on the claw support. The claw support is coaxially connected to the positioning sleeve for rotation. The multiple claws are evenly distributed along the circumference of the claw support and the claws can slide radially along the claw support. The clamping assembly also includes a driving mechanism arranged on the base of the headboard box for driving the claw support to rotate.

[0008] The control component comprises a sliding part and a rotating part. The sliding part comprises a sliding sleeve arranged on the positioning sleeve and capable of sliding along the axial direction of the positioning sleeve, and a push-pull mechanism arranged on the bedside box base for driving the sliding sleeve to slide.

[0009] The rotating part includes a claw support and a plurality of claws arranged on the claw support. The claw support is rotatably connected to the sliding sleeve and can rotate around the axis of the positioning sleeve. The claws are evenly distributed along the circumference of the claw support and the number is consistent with the number of the claws. One end of the claw is fixed on the claw support, and the other end cooperates with the claw. The sliding sleeve makes the claw support approach or move away from the claw support. The claws can separate or gather from each other under the action of the claws.

[0010] Furthermore, the length direction of the pusher claw and the axis of the positioning sleeve are in the same plane and an angle is set between them. The pusher claw approaches or moves away from the clamping claw along the axial direction of the positioning sleeve, and the clamping claw can move away from or approach the axis under the guidance of the pusher claw.

[0011] Furthermore, a guide hole is provided on the claw, and the pusher claw passes through the guide hole and cooperates with the claw.

[0012] Furthermore, guide wheels are provided at both ends of the guide hole in the radial direction to reduce friction between the guide hole and the pusher dog.

[0013] Furthermore, a transmission pin is provided on the claw support, which is evenly distributed along the circumference of the claw support. The axis of the transmission pin is parallel to the axis of the positioning sleeve. One end of the transmission pin is fixed on the claw support, and the other end passes through the corresponding pin hole on the claw support, so as to make the claw support and the rotating part rotate synchronously.

[0014] Furthermore, the claw support is coaxially rotatably connected to the positioning sleeve via a first bearing.

[0015] Furthermore, the pusher claw support is rotatably connected to the sliding sleeve through a second bearing.

[0016] Furthermore, the driving mechanism is a motor, the output shaft of the motor is provided with a driving gear, the claw support is provided with a driven gear, and the motor drives the claw support to rotate through the engagement of the driving gear and the driven gear.

[0017] Furthermore, the push-pull mechanism is a cylinder, the cylinder body is fixedly arranged on the bedside box base, the telescopic rod of the cylinder is fixedly connected to the sliding sleeve, and the sliding sleeve is controlled to slide on the positioning sleeve by controlling the telescopic movement of the telescopic rod of the cylinder.

[0018] Furthermore, the clamping claw is provided with a detachable pad at one end that contacts the tubular workpiece.

[0019] After adopting the above technical solution, the utility model has the following beneficial effects:

[0020] 1. The utility model is provided with three clamping claws to clamp the tubular workpiece together. Compared with the upper and lower fixed sleeve clamping in the prior art, the clamping is more secure;

[0021] 2. The utility model clamps the tubular workpiece by three claws, which can adapt to a larger range and does not require the replacement of fixed sleeves of different sizes, making the operation easier;

[0022] 3. The utility model can realize automatic clamping and releasing by setting a control component and a clamping component, and the clamping efficiency is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1It is a three-dimensional structural diagram of the utility model.

[0024] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model from another angle (protective cover omitted).

[0025] Figure 3 This is a schematic diagram of the structure of the utility model from a top view (protective cover omitted).

[0026] Figure 4 yes Figure 3 Schematic diagram of the cross-sectional structure in the AA direction.

[0027] Figure 5 yes Figure 4 Schematic diagram of the cross-sectional structure in the middle BB direction.

[0028] Figure 6 yes Figure 4 Schematic diagram of the cross-sectional structure in the CC direction.

[0029] Description of the drawings: 1. Bedside box base, 11. Positioning sleeve, 12. Protective cover, 2. Clamping assembly, 21. Claw support, 211. Driven gear, 22. Claw, 221. Guide hole, 222. Guide wheel, 223. Pad, 23. Driving mechanism, 231. Output shaft, 232. Driving gear, 24. Pin hole, 25. First bearing, 3. Control assembly, 31. Sliding sleeve, 32. Push-pull mechanism, 321. Telescopic rod, 33. Push claw support, 34. Push claw, 35. Transmission pin, 36. Second bearing. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the features and performance of an automatic clamping device for tubular workpieces in the present invention are further described in detail below with reference to the accompanying drawings and embodiments.

[0031] Please see the attached Figures 1 to 6 An automatic clamping device for tubular workpieces includes a headstock base 1 equipped with a positioning sleeve 11, a clamping assembly 2 for clamping the tubular workpiece, and a control assembly 3 for controlling the clamping assembly 2 to tighten or loosen the tubular workpiece. The positioning sleeve 11 is fixed to the headstock base 1, which is also equipped with a protective cover 12.

[0032] The clamping assembly 2 comprises a jaw support 21 and multiple jaws 22 mounted on the jaw support 21. The jaw support 21 is coaxially connected to the positioning sleeve 11 via a first bearing 25. The multiple jaws 22 are evenly distributed along the circumference of the jaw support 21 and can slide radially along the jaw support 21. To ensure a secure grip on tubular workpieces, three jaws 22 are provided in this embodiment. A removable spacer 223 is installed at the end of the jaw 22 that contacts the tubular workpiece.

[0033] The clamping assembly 2 also includes a drive mechanism 23 disposed on the headboard base 1 for driving the claw support 21 to rotate. Specifically, the drive mechanism 23 is a motor, whose output shaft 231 is provided with a driving gear 232, and the claw support 21 is provided with a driven gear 211. The motor drives the claw support 21 to rotate through the engagement of the driving gear 232 with the driven gear 211.

[0034] The control assembly 3 includes a sliding portion and a rotating portion. The sliding portion includes a sleeve 31 mounted on the positioning sleeve 11 and capable of sliding axially along the positioning sleeve 11, and a push-pull mechanism 32 mounted on the headboard base 1 for driving the sleeve 31 to slide. Specifically, the push-pull mechanism 32 is a cylinder, the cylinder body of which is fixedly mounted on the headboard base 1. The cylinder's telescopic rod 321 is fixedly connected to the sleeve 31, and the sleeve 31 is controlled to slide on the positioning sleeve 11 by controlling the extension and retraction of the cylinder's telescopic rod 321. To ensure uniform distribution of the thrust or pull acting on the sleeve 31, three cylinders are evenly distributed along the axial direction of the sleeve 31. The three cylinders operate synchronously to drive the sleeve 31 to slide along the positioning sleeve 11.

[0035] The rotating part includes a pusher claw support 33 and a plurality of pusher claws 34 provided on the pusher claw support 33. The pusher claw support 33 is rotatably connected to the sliding sleeve 31 through a second bearing 36 and can rotate around the axis of the positioning sleeve 11.

[0036] The pusher dogs 34 are evenly distributed along the circumference of the pusher dog support 33, and their number matches the number of the claws 22. One end of the pusher dog 34 is fixed to the pusher dog support 33, and the other end engages the claw 22. Specifically, the claw 22 is provided with a guide hole 221, through which the pusher dog 34 passes and engages with the claw 22. Guide wheels 222 are provided at both radial ends of the guide hole 221 to reduce friction with the pusher dog 34. As the sliding sleeve 31 and the pusher dog support 33 move toward or away from the claw support 21, the claws 22 can be separated or brought together by the pusher dog 34.

[0037] In a specific configuration, the length direction of the pusher pawl 34 and the axis of the positioning sleeve 11 are coplanar, and an angle is defined between them. The pusher pawl 34 approaches or moves away from the clamping claw 22 along the axial direction of the positioning sleeve 11, and the clamping claw 22 can move away from or toward the axis under the guidance of the pusher pawl 34. By changing the angle between the length direction of the pusher pawl 34 and the axis of the positioning sleeve 11, or by changing the axial sliding distance of the pusher pawl 34, the movable range of the clamping claw 22 can be changed to achieve different clamping ranges.

[0038] The pusher claw support 33 is also provided with a transmission pin 35. The transmission pins 35 are evenly distributed along the circumference of the pusher claw support 33. The axis of the transmission pin 35 is parallel to the axis of the positioning sleeve 11. One end of the transmission pin 35 is fixed to the pusher claw support 33, and the other end passes through the corresponding pin hole 24 in the clamping claw support 21, which is used to synchronize the rotation of the clamping claw support 21 and the rotating part. In a specific arrangement, three transmission pins 35 are evenly distributed along the circumference of the pusher claw support 33 and are staggered with the pusher claw 34.

[0039] During specific implementation, the cylinder is operated to extend the telescopic rod 321 , pushing the sliding sleeve 31 to slide along the positioning sleeve 11 close to the clamping assembly 2 , and the claws 22 on the clamping assembly 2 are synchronously moved away from each other under the action of the pusher claws 34 .

[0040] Place the tubular workpiece to be clamped in the working area so that the axis of the tubular workpiece coincides with the axis of the positioning sleeve 11. Operate the cylinder to retract the telescopic rod 321, pull the sliding sleeve 31 to slide along the positioning sleeve 11 away from the clamping assembly 2, and the claws 22 on the clamping assembly 2 approach each other synchronously under the action of the pusher claws 34. At this time, the three claws 22 stably clamp the tubular workpiece.

[0041] The starting motor drives the clamping jaw support 21 to rotate around the axis, and drives the tubular workpiece clamped by the clamping jaw 22 to rotate around the axis together for quenching treatment.

[0042] Driven by the transmission pin 35, the rotating portion of the control assembly 3 rotates synchronously with the claw support 21. Since the rotating portion and the sliding portion are rotatably connected via the second bearing 36, that is, the pusher claw support 33, the pusher claw 34, and the transmission pin 35 can slide axially with the sliding sleeve 31 while rotating around the axis, the rotation does not affect the clamping force of the claw 22.

[0043] After quenching is completed, the cylinder is operated to extend the telescopic rod 321, pushing the sliding sleeve 31 to slide along the positioning sleeve 11 close to the clamping assembly 2. The claws 22 on the clamping assembly 2 are synchronously moved away from each other under the action of the pusher claws 34, releasing the tubular workpiece, and an operation cycle is completed.

[0044] It should be noted that the parts not described in detail in this solution are all existing technologies. The above embodiments are only used to illustrate the present invention, but the present invention is not limited to the above embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention fall within the scope of protection of the present invention.

Claims

1. An automatic clamping device for tubular workpieces, comprising a headstock base (1) provided with a positioning sleeve (11), characterized in that: It also includes a clamping assembly (2) for clamping the tubular workpiece and a control assembly (3) for controlling the clamping assembly (2) to clamp or release the tubular workpiece; The clamping assembly (2) includes a claw support (21) and a plurality of claws (22) provided on the claw support (21), the claw support (21) being coaxially rotatably connected to the positioning sleeve (11), the plurality of claws (22) being evenly distributed along the circumference of the claw support (21), and each claw (22) being capable of sliding radially along the claw support (21), and the clamping assembly (2) further includes a driving mechanism (23) provided on the headboard base (1) for driving the claw support (21) to rotate. The control assembly (3) includes a sliding portion and a rotating portion. The sliding portion includes a sliding sleeve (31) provided on the positioning sleeve (11) and capable of sliding along the axial direction of the positioning sleeve (11), and a push-pull mechanism (32) provided on the bedside box base (1) for driving the sliding sleeve (31) to slide. The rotating portion includes a claw support (33) and a plurality of claws (34) provided on the claw support (33). The claw support (33) is rotatably connected to the sliding sleeve (31) and can rotate around the axis of the positioning sleeve (11). The claws (34) are evenly distributed along the circumference of the claw support (33) and the number is consistent with the number of the claws (22). One end of the claw (34) is fixed on the claw support (33) and the other end cooperates with the claw (22). The sliding sleeve (31) makes the claw support (33) approach or move away from the claw support (21). The claws (22) can separate from or gather together under the action of the claws (34).

2. The automatic clamping device for tubular workpieces according to claim 1, characterized in that: The length direction of the pusher claw (34) and the axis of the positioning sleeve (11) are in the same plane, and an angle is provided between the two. The pusher claw (34) approaches or moves away from the clamping claw (22) along the axial direction of the positioning sleeve (11), and the clamping claw (22) can move away from or approach the axis under the guidance of the pusher claw (34).

3. The automatic clamping device for tubular workpieces according to claim 1, characterized in that: A guide hole (221) is provided on the claw (22), and the pusher claw (34) passes through the guide hole (221) and cooperates with the claw (22).

4. The automatic clamping device for tubular workpieces according to claim 3, characterized in that: The guide hole (221) is provided with guide wheels (222) at both ends in the radial direction, for reducing friction between the guide hole (221) and the pusher claw (34).

5. The automatic clamping device for tubular workpieces according to claim 1, characterized in that: A transmission pin (35) is also provided on the claw support (33), and the transmission pin (35) is evenly distributed along the circumferential direction on the claw support (33). The axis of the transmission pin (35) is parallel to the axis of the positioning sleeve (11). One end of the transmission pin (35) is fixed on the claw support (33), and the other end passes through the corresponding pin hole (24) on the claw support (21) for making the claw support (21) rotate synchronously with the rotating part.

6. The automatic clamping device for tubular workpieces according to claim 1, characterized in that: The claw support (21) is coaxially rotatably connected to the positioning sleeve (11) via a first bearing (25).

7. The automatic clamping device for tubular workpieces according to claim 1, characterized in that: The pusher claw support (33) is rotatably connected to the sliding sleeve (31) via a second bearing (36).

8. The automatic clamping device for tubular workpieces according to claim 1, characterized in that: The driving mechanism (23) is a motor, the output shaft (231) of the motor is provided with a driving gear (232), the claw support (21) is provided with a driven gear (211), and the motor drives the claw support (21) to rotate through the engagement of the driving gear (232) and the driven gear (211).

9. The automatic clamping device for tubular workpieces according to claim 1, characterized in that: The push-pull mechanism (32) is a cylinder, the cylinder body of which is fixedly mounted on the bedside box base (1), the telescopic rod (321) of the cylinder is fixedly connected to the sliding sleeve (31), and the sliding sleeve (31) is controlled to slide on the positioning sleeve (11) by controlling the telescopic movement of the telescopic rod (321) of the cylinder.

10. The automatic clamping device for tubular workpieces according to claim 1, characterized in that: The clamping claw (22) is provided with a detachable pad (223) at one end that contacts the tubular workpiece.

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