TW202045279A - Tube cutter capable of adjusting pressure of cutter - Google Patents

Abstract

A tube cutter includes a main member, a cutter feeding assembly connected to the main member, a cutting assembly having a cutter connected to the cutter feeding assembly and several rollers pivoted on the main member, and a pressure adjusting assembly including an adjustor and a spring. The adjustor is movably connected to the cutter feeding assembly, and the spring has opposite ends urging the cutter feeding assembly and the adjustor. The spring force is adjustable by moving the adjustor.

Description

Adjustable pre-pressure pipe cutter

The invention relates to the technical field of a hand tool, in particular to a pipe cutter with adjustable preload.

Generally, a special pipe cutter is used to cut a pipe. Firstly, the pipe to be cut is set on the pipe cutter, and then the pipe cutter is operated to press the cutting knife against the pipe. Finally, the pipe cutter is continuously rotated to make the cutter pass through the outer peripheral surface of the pipe until the pipe is cut.

In order to provide the pipe cutter with automatic knife feeding function, the pipe cutter is usually provided with a spring to provide the cutter with a pre-compression, so that the cutter can cut the pipe according to the state of the pipe being cut. Automatically advance until the pipe is cut off.

However, depending on the material of the pipe being cut, the preload provided to the cutter should be different. For example, when the pipe to be cut is soft, the preload should be relatively small; conversely, when the pipe to be cut is hard, the preload should be relatively large. However, the conventional cutter can only provide a preload size and cannot be adjusted according to the pipe being cut.

The main purpose of the present invention is to provide a pipe cutter with adjustable preload, which allows the user to adjust the size of the preload according to the material properties of the pipe to be cut.

In order to achieve the above-mentioned object of the invention, the adjustable pre-pressure pipe cutter provided by the present invention includes: a body with a cutting space; a feed assembly with a shaft tube installed on the body and one end at the cutting The space can be moved relative to the main body, but is not rotatable. A base is installed on the shaft tube. The base has a screw hole, a screw, screwed into the screw hole of the shaft tube, and a rotating drum connected In the screw, when the drum is rotated, the screw is driven to rotate; a cutting assembly has a cutter and a plurality of rollers; wherein, the cutter and the rollers are located in the cutting space; the cutter and the rollers One of the rollers is installed on one end of the shaft tube located in the cutting space, and the other is installed on the main body; and an adjustable pre-compression assembly with a pre-compression spring and an adjustment member; the adjustment member Installed on the shaft tube; the pre-compression spring is arranged between the adjustment member and the base, and the two ends of the pre-compression spring elastically press against the adjustment member and the base.

The user can manipulate the adjustment piece to move it relative to the shaft tube to adjust the distance between the adjustment piece and the base, and accordingly change the elastic force of the pre-compression spring.

The following is a detailed description of the preferred embodiments according to the objectives, effects, and structural configuration of the present invention.

Please refer to Figures 1 to 3, the adjustable pre-pressure pipe cutter provided by a preferred embodiment of the present invention mainly includes: a main body 10, a feed assembly 22, a cutting assembly 60, and An adjustable pre-compression assembly 68.

The main body 10 has a C-shaped arc portion 12 and a tube portion 14 connected to one end of the arc portion 12. The tube portion 14 has a non-circular tube hole 16, which in this embodiment is a rectangular hole. The tube 14 has an external thread 18 on the outer peripheral surface. The concave portion of the arc portion 12 forms a cutting space 20.

The feeding assembly 22 has a shaft tube 24, a base 36, a screw 42, an inner cover 48, and a rotating drum 54. The shaft tube 24 is a tube body with a shape symmetrical to the non-circular tube hole 16 of the tube portion 14, one end has two parallel mounting portions 26, and the other end is provided with a pair of guide grooves 28. The two guide grooves 28 extend along the long axis of the shaft tube 24. The shaft tube 24 is further provided with two notches 30 connecting the side of the shaft tube 24 and the two guide grooves 28. The shaft tube 24 is provided with a circular shaft hole 32 in the center, and an adjusting thread 34 is provided on the inner side of the shaft tube 24. The base 36 has a threaded hole 38 with a shaft 40 on both sides. The shaft portion 40 of the base 36 enters the two guide grooves 28 through the two notches 30, so that the base 36 is mounted on the shaft tube 24 in a manner movable along the two guide grooves 28, and the base The screw hole 38 of 36 is aligned with the shaft hole 32 of the shaft tube 24. The shaft tube 24 is inserted into the tube portion 14 of the base 36, and the two mounting portions 26 extend out of the tube portion 14 and are located in the cutting space 20. Due to the shapes of the shaft tube 24 and the tube hole 16, the shaft tube 24 can only move back and forth along the axial direction of the tube portion 14, but cannot rotate. The screw 42 is screwed into the screw hole 38 of the base 36 to have a section in the shaft tube 24. One end of the screw 42 has a retaining wall 44 and a head 46 located outside the tube 14. The inner cover 48 has a cover hole 50 at one end. The cover hole 50 is smaller than the blocking wall 44 but larger than the head 46. The inner cover 48 further has an inner thread 52. The inner cover 48 is locked to one end of the tube portion 14 so that the inner thread 52 of the inner cover 48 is engaged with the outer thread 18 of the tube portion 14. At this time, the head 46 of the screw 42 passes through the cover hole 50 of the inner cover 48, but the blocking wall 44 is blocked by the inner cover 48. One end of the rotating drum 54 has an elliptical cylindrical hole 56; the shape of the head 46 is symmetrical to the elliptical cylindrical hole 56. The rotating drum 54 is sleeved on the tube portion 14 so that the inner cover 48 is located in the rotating drum 54 and the head 46 passes through the oval hole 56. The rotating drum 54 is locked into the head 46 with a screw 58 so as to be in a fixed state with the screw 42. Thereby, rotating the drum 54 can drive the screw 42 to rotate.

The cutting assembly 60 has a cutting knife 62 and a plurality of rollers 64. In this embodiment, the cutter 62 is installed between the two installation portions 26 of the shaft tube 24 by a pivot 66; the rollers 64 are pivoted on the inner side of the arc portion 12 to make the cutting The knife 62 and the rollers 64 are all located in the cutting space 20. In another embodiment, the cutter is installed on the arc part; the rollers are pivoted on the shaft tube (not shown).

The adjustable pre-compression assembly 68 has a pre-compression spring 70 and an adjusting member 72. The adjusting member 72 has an external thread 74. The adjusting member 72 is installed in the shaft tube 24 so that the external thread 74 is engaged with the adjusting thread 34 of the shaft tube 24. The pre-compression spring 70 is disposed in the shaft tube 24 between the adjustment member 72 and the base 36, and two ends of the pre-compression spring 70 elastically press against the adjustment member 72 and the base 36.

The operation mode of the adjustable pre-compression pipe cutter of the present invention in cutting a pipe (not shown in the figure) is the same as that of the conventional pipe cutter, and will not be repeated.

Please refer to Fig. 4, if the pre-pressure of the pipe cutter needs to be adjusted to be small, the user only needs to use a tool 76, such as a flat-head screwdriver, to extend into the opening through the shaft hole 32 between the two installation parts 26 In the shaft tube 24, the adjusting member 72 is rotated to increase the distance between the adjusting member 72 and the base 36, so that the elastic force of the pre-compression spring 70 can be reduced. On the contrary, please refer to Fig. 5. If the pre-pressure of the pipe cutter needs to be increased, it is only necessary to rotate the adjusting member 72 in the reverse direction to reduce the distance between the adjusting member 72 and the base 36, and so on. The elastic force of the pre-compression spring 70 can be increased.

In summary, the adjustable pre-pressure pipe cutter provided by the present invention can provide users with adjusting the pre-pressure of the pipe cutter according to the conditions of the pipe to be cut (material, pipe wall thickness, etc.) to obtain excellent Cutting operations.

The above-mentioned embodiments are only illustrative of the technology and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with this technology can modify and change the above-mentioned embodiments without violating the technical principle and spirit of the present invention. Therefore, the protection scope of the present invention should be listed in the scope of patent application described later .

10: main body 12: Curved part 14: Pipe Department 16: pipe hole 18: External thread 20: cutting space 22: Feed components 24: Shaft tube 26: Installation Department 28: Guide groove 30: gap 32: Shaft hole 34: Adjust thread 36: Pedestal 38: screw hole 40: Shaft 42: Screw 44: Block the Wall 46: head 48: inner cover 50: cover hole 52: Internal thread 54: rotating drum 56: barrel hole 58: Screw 60: Cutting component 62: Cutter 64: scroll wheel 66: pivot 68: Adjustable preload components 70: Preload spring 72: adjustment parts 74: External thread 76: Tools

Figure 1 is a perspective view of a preferred embodiment of the present invention. Figure 2 is an exploded view of a preferred embodiment of the present invention. Figure 3 is a cross-sectional view of a preferred embodiment of the present invention. Figure 4 is a partial cross-sectional view of a preferred embodiment of the present invention, showing a state where the preload is adjusted to a smaller state. Figure 5 is a partial cross-sectional view of a preferred embodiment of the present invention, showing the state of adjusting the preload to a larger state.

10: main body

12: Curved part

14: Pipe Department

16: pipe hole

18: External thread

20: cutting space

22: Feed components

24: Shaft tube

26: Installation Department

28: Guide groove

30: gap

32: Shaft hole

36: Pedestal

38: screw hole

40: Shaft

42: Screw

44: Block the Wall

46: head

48: inner cover

50: cover hole

52: Internal thread

54: rotating drum

56: barrel hole

58: Screw

60: Cutting component

62: Cutter

64: scroll wheel

66: pivot

68: Adjustable preload components

70: Preload spring

72: adjustment parts

74: External thread

Claims (8)

A pipe cutter with adjustable pre-compression, including: A body with a cutting space; A feed assembly with a shaft tube installed on the main body, one end in the cutting space, movable relative to the main body, but non-rotatable, a base installed on the shaft tube, the base having a screw hole , A screw, screwed into the screw hole of the shaft tube, and a rotating drum connected to the screw, when the rotating drum is rotated, the screw is driven to rotate; A cutting assembly having a cutting knife and a plurality of rollers; wherein the cutting knife and the rollers are located in the cutting space; the cutting knife and one of the rollers are installed in the shaft tube in the cutting space One end, the other is installed in the main body; and An adjustable pre-compression assembly has a pre-compression spring and an adjustment piece; the adjustment piece is installed on the shaft tube; the pre-compression spring is arranged between the adjustment piece and the base, and two of the pre-compression spring The end is elastically pressed against the adjustment piece and the base; the adjustment piece can be operated to move relative to the shaft tube to adjust the distance between the adjustment piece and the base, thereby changing the elastic force of the pre-compression spring. As described in the first item of the scope of patent application, the adjustable preload pipe cutter, wherein the main body has an arc portion and a pipe portion; the cutting space is formed in the recess of the arc portion; the pipe portion has a A non-circular tube hole, the shaft tube has an outer shape symmetrical with the tube hole of the tube portion, so as to be inserted into the tube hole. As described in the first item of the scope of patent application, the adjustable pre-compression pipe cutter, wherein the shaft tube is provided with a pair of guide grooves extending along the long axis of the shaft tube; the base has a pair of shaft parts connected respectively In the two guide grooves, the base is installed on the shaft tube in a manner movable along the two guide grooves. As described in item 3 of the scope of patent application, the tube cutter with adjustable preload, wherein the shaft tube is further provided with two notches, which communicate with the side of the shaft tube and the two guide grooves for the two shafts to pass through the two To enter the second guide groove. As described in item 1 of the scope of patent application, the adjustable preload pipe cutter, wherein the shaft tube has a shaft hole, the inner side of the shaft hole is provided with an adjustment thread; the adjustment piece has an external thread; the adjustment piece is provided In the shaft hole of the shaft tube, the external thread of the adjustment piece is engaged with the adjustment thread; thereby, the distance between the adjustment piece and the base can be adjusted by rotating the adjustment piece. As described in item 1 of the scope of patent application, the adjustable preloading pipe cutter, wherein one end of the shaft tube has a mounting portion located in the cutting space; the cutter or the rollers are mounted on the mounting portion on. As described in item 1 of the scope of patent application, the adjustable pre-compression pipe cutter further includes an inner cover disposed on the main body and located between the main body and the drum to prevent the screw from leaving the main body. As described in item 7 of the scope of patent application, the adjustable pre-compression pipe cutter, wherein one end of the screw has a block and a head; the inner cover has a cover hole, the cover hole is smaller than the block, but Larger than the head; the blocking wall is blocked by the inner cover; the head of the screw passes through the cover hole of the inner cover to connect the drum.

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