Adjustable rotary pipe cutting device

Abstract

The utility model discloses an adjustable rotary pipe cutting device which comprises a knife rest which can be opened and closed and is round after being closed, a knife assembly and a plurality of pipe positioning assemblies evenly distributed along the knife rest are arranged on the knife rest, and each pipe positioning assembly comprises a positioning rod installation seat and a positioning rod arranged in the positioning rod installation seat. The positioning rod can slide in the radial direction of the tool rest. A set of positioning idler wheels are arranged at the end, close to the circle center of the tool rest, of the positioning rod, a plurality of gear adjusting grooves are formed in the side face of the positioning rod, and adjusting buckles matched with the gear adjusting grooves are arranged on the positioning rod installation base. According to the pipe cutting device, the adjusting buckles are matched with the different gear adjusting grooves, so that the same pipe cutting device can be suitable for cutting pipes of different common specifications, and the applicability is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe cutting, in particular to an adjustable rotary pipe cutting device. Background Art

[0002] Pipes are very common in people's daily lives. When constructing pipe fittings, pipes usually need to be cut according to the required length. For cutting pipes with a larger diameter, ordinary handheld cutting scissors will not meet the usage requirements. Currently, generally an encircling cutting tool is used. The cutting tool with a circular ring structure holds the pipe, and then the cutting is performed on the pipe surface by a cutter. However, the current structure generally can only position a certain specification of pipe and cannot be adjusted, so the applicability is poor. In addition, the feeding structure of the cutter and its operation are also relatively complex and cumbersome, and it is not convenient to use. Summary of the Utility Model

[0003] The purpose of the utility model is to provide an adjustable rotary pipe cutting device to solve the problems existing in the prior art.

[0004] To achieve the above purpose, the utility model provides the following technical solutions:

[0005] The adjustable rotary pipe cutting device includes a tool rest that can be opened and closed and forms a circle after closing. A cutter assembly and several pipe positioning assemblies evenly distributed along the tool rest are provided on the tool rest. The pipe positioning assembly includes a positioning rod mounting seat and a positioning rod arranged in the positioning rod mounting seat. The positioning rod can slide radially along the tool rest. A set of positioning rollers is provided at one end of the positioning rod close to the center of the tool rest. Several gear position adjustment grooves are provided on the side of the positioning rod, and an adjustment buckle cooperating with the gear position adjustment grooves is provided on the positioning rod mounting seat.

[0006] Preferably, the cutter assembly includes a cutter mounting seat and a frame arranged in the cutter mounting seat. The frame can slide radially along the tool rest. A cutter blade is provided at one end of the frame close to the center of the tool rest. A threaded rod that can rotate freely is arranged in the frame. A rotary handle is fixedly connected to the end of the threaded rod far from the cutter blade. A cutter lock is provided on the cutter mounting seat. The relative middle part of the cutter lock is arranged on the cutter mounting seat through a rotating shaft. A claw matching the threaded rod is provided at one end of the cutter lock, and the other end extends outwards to form a button. A return torsion spring is provided on the rotating shaft of the cutter lock.

[0007] Preferably, the cutter blade is circular and can rotate freely.

[0008] Preferably, a return tension spring is provided between the cutter mounting seat and the frame.

[0009] Preferably, the tool rest is composed of an upper tool rest and a lower tool rest which are respectively semi-circular. One end of the upper tool rest and the lower tool rest is hinged to each other, and a tool rest locking mechanism is provided at the other end.

[0010] Preferably, the tool rest locking mechanism includes a locking bolt hinged to the upper tool rest and a U-shaped groove provided on the lower tool rest, and a rotating nut is provided at the outer end of the locking bolt.

[0011] Preferably, a return spring is provided between the positioning rod and the positioning rod mounting seat.

[0012] Preferably, the side of the gear position adjusting groove away from the center of the tool rest is wedge-shaped.

[0013] Preferably, the relative middle part of the adjusting buckle is arranged on the positioning rod mounting seat through a rotating shaft. One end of the adjusting buckle is matched with the adjusting card slot, and the other end extends outward; a return torsion spring is provided on the rotating shaft of the adjusting buckle.

[0014] Preferably, the positioning roller is a bearing.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] 1. Through the cooperation of the adjusting buckle and different gear position adjusting grooves, the same pipe cutting device can be applied to the cutting of a variety of different commonly used specifications of pipes, and the applicability is enhanced.

[0017] 2. As a preferred embodiment of the present utility model, the positioning roller adopts a bearing with smoother rotation and smaller rotation error.

[0018] 3. As a preferred embodiment of the present utility model, the tool feeding structure is simpler and the operation is convenient. By pressing the button on the tool assembly to open the tool locking buckle, the tool can be initially fed to contact the pipe, then the second feeding is carried out by rotating the handle, and then the cutting device is rotated around the pipe to cut the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is the overall structural schematic diagram of the present utility model.

[0020] Figure 2 is the structural schematic diagram of the tool assembly in the present utility model.

[0021] Figure 3 is the matching schematic diagram of the frame body and the tool locking buckle in the present utility model.

[0022] Figure 4 is the structural schematic diagram of the pipe positioning assembly in the present utility model.

[0023] In the figure: 1. Tool rest, 11. Upper tool rest, 12. Lower tool rest, 13. Locking bolt, 14. U-shaped groove, 15. Rotating nut;

[0024] 2. Tool component, 21. Tool mounting seat, 22. Frame body, 23. Blade, 24. Threaded rod, 25. Rotating handle, 26. Claw, 27. Button;

[0025] 3. Pipe positioning component, 31. Positioning rod mounting seat, 32. Positioning rod, 33. Positioning roller, 34. Gear position adjustment groove, 35. Adjusting buckle. Specific implementation mode

[0026] In order to make the purpose, technical solution and advantages of the present utility model clearer and more understandable, the present utility model will be further specifically described below through embodiments.

[0027] Embodiment: An adjustable rotary pipe cutting device, as Figures 1-4 shown, includes a tool rest 1 with an overall circular shape. There is a tool component 2 and four pipe positioning components 3 evenly distributed along the tool rest on the tool rest 1.

[0028] The tool rest 1 is composed of a semi-circular upper tool rest 11 and a lower tool rest 12. One end of the two is hinged to each other, and the other end is opened and closed through a tool rest locking mechanism. Specifically, the tool rest locking mechanism includes a locking bolt 13 hinged to the upper tool rest and a U-shaped groove 14 provided on the lower tool rest. The outer end of the locking bolt 13 is provided with a rotating nut 15. Rotating the locking bolt 13 into the U-shaped groove 14 and then tightening the rotating nut 15 can fix the tool rest, and vice versa to open it.

[0029] The tool component 2 includes a tool mounting seat 21 fixedly arranged on the tool rest and a frame body 22 arranged in the tool mounting seat. The tool mounting seat 21 is in the shape of a square tube, and the cross-sectional contour shape of the frame body 22 matches that of the tool mounting seat, so that the frame body 22 can slide radially along the tool rest, but its circumferential degree of freedom is restricted. One end of the frame body 22 close to the center of the tool rest is provided with a blade 23. The blade 23 is circular and can rotate freely. A freely rotatable threaded rod 24 is arranged in the frame body 22. The end of the threaded rod 24 far from the blade passes out of the frame body and is fixedly connected with a rotating handle 25.

[0030] The surface of the tool mounting seat 21 has a hollowed-out area, within which a tool locking buckle is provided. The relative middle part of the tool locking buckle is arranged on the tool mounting seat 21 through a rotating shaft, forming a lever structure. One end of the tool locking buckle is provided with a claw 26 that meshes with the threaded rod, and the other end extends outward to form a button 27. Moreover, a return torsion spring is provided on the rotating shaft of the tool locking buckle. Pressing the button 27 can disengage the claw 26 from the threaded rod 24. When the button 27 is released, under the action of the return torsion spring, the claw 26 meshes with the threaded rod 24 to position the tool assembly. At this time, the threaded rod 24 and the claw 26 form a lead screw-nut structure. That is, at this time, rotating the rotating handle 25 can make the tool assembly achieve fine adjustment of feeding or retracting through the relative rotation of the threaded rod 24 and the claw 26. A return tension spring (not shown in the figure, and the two ends of this return tension spring can be respectively fixed at different positions of the tool mounting seat and the frame) is also provided between the tool mounting seat 21 and the frame 22. After pressing the button 27, the frame 22 pops outwards under the action of the return tension spring, and the tool can be reset after cutting is completed.

[0031] The pipe positioning assembly 3 includes a positioning rod mounting seat 31 and a positioning rod 32 arranged inside the positioning rod mounting seat. The positioning rod mounting seat 31 has a square pipe structure, and the cross-sectional shape of the positioning rod 32 matches the internal shape of the positioning rod mounting seat, so that the positioning rod 32 can slide radially along the tool rest. One end of the positioning rod 32 close to the center of the tool rest is provided with a set of positioning rollers 33. In this embodiment, bearings with smoother rotation are selected. Three gear adjustment grooves 34 are provided on the side of the positioning rod 32, and the setting of each gear adjustment groove 34 corresponds to a common pipe diameter specification, such as the three common calibers of 200mm, 225mm, and 250mm. An adjustment buckle 35 that cooperates with the gear adjustment groove is provided on the side of the positioning rod mounting seat 31.

[0032] Specifically, the relative middle part of the adjustment buckle 35 is arranged on the positioning rod mounting seat 31 through a rotating shaft to form a lever structure. One end of the adjustment buckle 35 matches the gear adjustment groove 34, and the other end extends outward to form a pressing part; a return torsion spring is also provided on the rotating shaft of the adjustment buckle 35 for the reset of the adjustment buckle in the non-pressed state. When the pressing part is pressed, the adjustment buckle 35 disengages from the gear adjustment groove 34, and when released, the adjustment buckle 35 can be snapped into the corresponding gear adjustment groove 34.

[0033] In the above structure, the side of the gear adjustment groove 34 away from the center of the tool rest is wedge-shaped. When the positioning rod 32 is fed towards the center of the tool rest, it can be easily pushed by the cooperation of the adjustment buckle 35 and the wedge-shaped transition surface without manually pressing the pressing part. When retracting in the reverse direction, the adjustment buckle 35 can be resisted by the other side of the gear adjustment groove 34. In addition, a return tension spring (not shown in the figure, and the two ends of this return tension spring can be respectively fixed at different positions of the positioning rod mounting seat and the positioning rod) is provided between the positioning rod 32 and the positioning rod mounting seat 31 for the automatic reset of the positioning rod 32 when it retracts.

[0034] In the specific implementation of this embodiment, first, the tool rest locking mechanism is opened. After the tool rest is opened, it is sleeved outside the pipe to be cut, and the tool rest 1 is locked through the tool rest locking mechanism. Then, according to the pipe specifications, the pipe positioning component 3 is adjusted to the corresponding gear position. During the adjustment, directly push the positioning rod 32 and make the adjustment buckle 35 snap into the corresponding gear adjustment groove 34. At this time, the four groups of positioning rollers 33 clamp the pipe to achieve positioning. Then, the tool locking buckle is opened through the button 27, and the frame body 22 can be pushed forward initially until the blade 23 contacts the pipe. After releasing the button 27, the claw 26 meshes with the threaded rod 24 for tool positioning, and then the second feed is performed by rotating the handle 25. Then, the cutting device is rotated around the pipe to cut the pipe. After cutting is completed, press the button 27, and the tool resets under the action of the return spring; press the pressing part in the pipe positioning component 3, and the positioning rod 32 also resets under the action of the return spring.

[0035] The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly. It cannot be used to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. An adjustable rotary pipe cutting device, comprising a knife holder that can be opened and closed and is circular when closed, wherein the knife holder is provided with a knife assembly and a plurality of pipe positioning assemblies evenly distributed along the knife holder, characterized in that: The pipe positioning assembly includes a positioning rod mounting seat and a positioning rod arranged in the positioning rod mounting seat, and the positioning rod can slide radially along the tool holder; a group of positioning rollers are provided at one end of the positioning rod close to the center of the tool holder, and a plurality of gear adjustment grooves are provided on the side of the positioning rod, and an adjustment buckle that cooperates with the gear adjustment groove is provided on the positioning rod mounting seat.

2. The adjustable rotary pipe cutting device according to claim 1, characterized in that: The tool assembly comprises a tool mounting seat and a frame body arranged in the tool mounting seat, the frame body being capable of sliding radially along the tool holder; a blade is provided at one end of the frame body close to the center of the tool holder; a threaded rod which can rotate freely is provided in the frame body, and a rotating handle is fixedly connected to the end of the threaded rod away from the blade; a tool locking buckle is provided on the tool mounting seat, and the relative middle part of the tool locking buckle is arranged on the tool mounting seat through a rotating shaft, a claw matching the threaded rod is provided at one end of the tool locking buckle, and the other end extends outward to form a button, and a reset torsion spring is provided on the rotating shaft of the tool locking buckle.

3. The adjustable rotary pipe cutting device according to claim 2, characterized in that: The blade is circular and can rotate freely.

4. The adjustable rotary pipe cutting device according to claim 2, characterized in that: A reset tension spring is arranged between the tool mounting seat and the frame body.

5. The adjustable rotary pipe cutting device according to claim 1, characterized in that: The tool holder is composed of an upper tool holder and a lower tool holder which are both semicircular in shape. One end of the upper tool holder and the lower tool holder are hinged to each other, and the other end is provided with a tool holder locking mechanism.

6. The adjustable rotary pipe cutting device according to claim 5, characterized in that: The tool holder locking mechanism comprises a locking bolt hinged to the upper tool holder and a U-shaped groove arranged on the lower tool holder, and a rotating nut is arranged at the outer end of the locking bolt.

7. The adjustable rotary pipe cutting device according to claim 1, characterized in that: A reset tension spring is arranged between the positioning rod and the positioning rod mounting seat.

8. The adjustable rotary pipe cutting device according to claim 7, characterized in that: The side of the gear adjustment groove away from the center of the tool holder is wedge-shaped.

9. The adjustable rotary pipe cutting device according to claim 8, characterized in that: The relative middle part of the adjusting buckle is arranged on the positioning rod mounting seat through a rotating shaft, one end of the adjusting buckle matches the adjusting slot, and the other end extends outward; a reset torsion spring is arranged on the rotating shaft of the adjusting buckle.

10. The adjustable rotary pipe cutting device according to claim 1, characterized in that: The positioning roller is a bearing.

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