WO2012059021A1

WO2012059021A1 - Pipe cutter

Info

Publication number: WO2012059021A1
Application number: PCT/CN2011/081459
Authority: WO
Inventors: 许小平; 赵智杰
Original assignee: 杭州博达设计咨询有限公司
Priority date: 2010-11-04
Filing date: 2011-10-27
Publication date: 2012-05-10

Abstract

Disclosed is a pipe cutter, comprising a cutter body, a power apparatus and a transmission mechanism disposed within the cutter body, and a cutting blade disposed at the head of the cutter body. The cutting blade comprises a cutting assembly and a clamping assembly. The movable joint region between the cutting assembly and the clamping assembly is provided with a gear rack fixedly connected to the clamping assembly, and a side plate fixedly connected to the cutting assembly. The upper part of the gear rack is provided with a feeding component with the lower end able to mesh with the gear rack, and an eccentric wheel with a rocker for driving the feeding component. Two identical guide slots are provided on the side plate, and the side wall of the feeding component is provided with two guide pins sliding within the two guide slots respectively. A return spring is provided between the left end of the feeding component and the left end of the side plate. Compared to the prior art, the present invention can rapidly cut and reset when cutting a pipe, is convenient to operate, has high efficiency, is structurally simple and is of relatively low cost.

Description

Pipe cutting machine

Technical field

The invention relates to a pipe cutter for a metal pipe.

Background technique

In the air conditioning and refrigeration and automotive industries, a large number of metal pipe fittings having a diameter ranging from 12 to 28 mm and a maximum wall thickness of 1 mm are used. For the cutting of these metal pipe fittings, a pipe cutter is required. The existing pipe cutter is mainly composed of a fuselage, an electric motor and a transmission mechanism disposed in the fuselage, and a cutting cutter head disposed at the head of the fuselage, the cutting cutter head including a rotary blade. A cutting assembly and a clamping assembly for holding the tube to be cut. In the process of cutting the pipe, the cutting feed amount of the rotary blade needs to be manually rotated by a screw, and the cutting pitch is relatively moved toward the clamping assembly by the rotating pitch of the screw to complete the cutting feed. The pipe cutting machine of this structure has the following drawbacks: first, due to the need for manual operation, the labor intensity is high; secondly, after the cutting is completed, the screw is required to be reset, and the cutting efficiency is low.

Summary of the invention

The object of the present invention is to provide an automatic feed magnetic reset pipe cutting machine, which can automatically provide the cutting feed force of the rotary blade during the process of cutting the metal pipe fitting, and the cutting cutter head can be automatically reset after the cutting is completed, and the cutting efficiency is high, labor The strength is small, and the structure is simple, durable, and low in cost.

In order to achieve the above object, the present invention can adopt the following technical solutions:

A pipe cutting machine of the present invention includes a fuselage, a power device and a transmission mechanism disposed in the fuselage, and a cutting bit disposed at a head of the body, the cutting blade including a rotating blade and a cutting assembly of the blade compression spring, and a clamping assembly for holding the pipe to be cut, and a rack and a cutting assembly fixed to the clamping assembly are disposed in a movable engaging region of the cutting assembly and the clamping assembly a fixed side plate, a feeding member at a lower end of the rack being engageable therewith, and an eccentric provided on the side plate with a rocker for driving the feeding member, The side plates are provided with the same two guiding slots, the guiding slots are divided into two communicating left and right sections, the left section of the guiding slot is parallel to the rack, and the right section of the guiding slot is upward Tilting, two guide pins respectively sliding in the two guiding grooves are fixed on the side wall of the feeding member, and are disposed between the left end portion of the feeding member and the left end portion of the side plate a return spring; the feeding member meshes with the rack when the rocker is pressed A guide pin located in the left section of the left end of the guide groove, the rocker in the reset state, the feeding with the rack member separated from the guide pin at the right end of the right section of the guide groove.

In the pipe cutting machine of the present invention, a transmission link may be disposed between the transmission mechanism and the rocker.

In the pipe cutting machine of the present invention, the cutting bit can be rotatably connected to the transmission mechanism through a gear, and a rocker stopper is arranged at a lower portion of the opening of the fuselage head, and the right end of the rocker block is outside A rocker reset magnet is provided.

A pipe cutting machine according to the present invention, a first compression spring is disposed between a left end portion of the cutting assembly and a casing of the cutting bit, and a shell at the right end of the clamping assembly and the cutting head A second compression spring is arranged between the bodies.

DRAWINGS

1 is an enlarged schematic view showing the internal structure of a cutting head in a rocker reset state according to the present invention;

Figure 2 is a schematic view showing the internal structure of the cutting head of the rocker of Figure 1 in a pressed state;

Figure 3 is a perspective structural view of the eccentric with the rocker of Figure 1;

Figure 4 is a perspective view showing the three-dimensional structure of the fuselage head of the present invention;

Figure 5 is a schematic view showing the structure of the cutting head of the present invention which is rotatably connected by a gear and a transmission mechanism;

Figure 6 is a schematic view showing the structure of the rocker of the present invention under the state of being pressed by the rocker block;

Fig. 7 is a structural schematic view showing the rocker of Fig. 6 in a state in which the rocker is reset.

detailed description

Example 1

As shown in FIG. 1 to FIG. 4, the pipe cutting machine of the present invention comprises a fuselage 1, a power unit and a transmission mechanism disposed in the body 1, and a cutting head disposed on the body head 2. 3. The cutting bit 3 comprises a cutting assembly 3a provided with a rotary blade 301 and a blade compression spring 302, and a clamping assembly 3b for holding the pipe member 303 to be cut, at the cutting assembly 3a and the clamping assembly 3b The movable engaging area is provided with a rack 304 fixed to the clamping assembly 3b, a side plate 305 fixed to the cutting assembly 3a, and a feeding member 306 at a lower portion of the rack 304 for engaging the lower end thereof. And an eccentric wheel 308 provided on the side plate 305 with a rocker 307 for driving the feeding member 306, and a transmission link is provided between the rocker 307 and the transmission mechanism, The side plate 305 is provided with the same two guiding grooves 309, and the guiding grooves 309 are divided into two left and right segments, and the left portion of the guiding groove 309 is parallel to the rack 304. The right side of the guiding groove 309 is inclined upward, and two guiding pins 310 respectively sliding in the two guiding grooves are fixed on the side wall of the feeding member 306. A return spring 311 is disposed between the left end portion of the feeding member 306 and the left end portion of the side plate 305, and a portion is disposed between the left end portion of the cutting assembly 3a and the casing of the cutting bit 3 a compression spring 6, between the right end of the clamping assembly 3b and the housing of the cutting bit 3 is provided with a second compression spring 7; in the state in which the rocker 307 is pressed, the feeding member 306 is engaged with the rack 304, the guide pin 310 is located at the left end of the left section of the guide groove 309, and in the reset state of the rocker 307, the feeding member 306 is separated from the rack 304, the guide The pin 310 is located at the right end of the right section of the guide groove 309.

In the pipe cutting machine of the first embodiment, since the side plate with the guide groove and the eccentric wheel for driving the feeding member with the rocker are used, after the pipe to be cut is placed in the cutting head, the rocker is moved. Turning counterclockwise, the eccentric drive the feed member to the left, and the guide pin fixed to the feed member moves to the lower left along the right side of the guide groove, the feed member meshes with the rack, and the eccentric continues to drive the feed member to the left. The guide pin moves to the left along the left side of the guide groove, and the feeding member drives the rack to move to the left. The clamp assembly fixed to the rack moves to the left relative to the cutting assembly, and when the rocker turns counterclockwise to the limit position, it enters the pressing state. The feed member reaches the leftmost end, at which time the guide pin is located at the left end of the left section of the guide groove, and the clamp assembly fixed to the rack moves to the left to the left end with respect to the cutting assembly, and the cutting assembly passes through the pipe to be cut Squeeze the rotary blade to the left so that the blade compression spring has a pre-compression that clamps the pipe to be cut. Since the eccentric has a self-locking function after tightening the feeding member, the operator does not need to hold the rocker, and then presses Rotate the blade cutter and rotate the blade Cutting the pipe, because the blade compression spring has a pre-compression, the rotary blade automatically feeds under the pressure of the blade compression spring until the pipe is cut, the moving rocker rotates clockwise to reset and enters the reset state, and the eccentric releases the feeding component. The guide pin on the component returns to the right end of the right section of the guide groove along the guide groove under the elastic force of the return spring, and the feed member moves to the rightmost end, because the feed member is lifted up along the right guide groove, and the rack is at the In the non-engaged state, the clamp assembly integrated with the rack is in a non-clamped state, ready for the next clamping of the pipe to be cut. Compared with the above prior art, the above structure makes the structure of the invention simple and reliable, and the cost is low. By moving the rocker, the feeding and resetting of the cutting pipe can be completed quickly, the operation is convenient, and the cutting efficiency is high. Moreover, the pipe cutting machine of Embodiment 1 is provided with a transmission link between the transmission mechanism and the rocker, thereby realizing automatic control of the rocker, further improving cutting efficiency and reducing labor intensity.

Example 2

As shown in FIGS. 1 to 7, a pipe cutting machine includes a body 1, a power unit and a transmission mechanism disposed in the body 1, and a cutting bit 3 disposed on the body head 2, The cutting bit 3 includes a cutting assembly 3a provided with a rotary blade 301 and a blade compression spring 302, and a clamping assembly 3b for holding the pipe member 303 to be cut, in the active engagement region of the cutting assembly 3a and the clamping assembly 3b Provided with a rack 304 fixed to the clamping assembly 3b, a side plate 305 fixed to the cutting assembly 3a, and a feeding member 306 at the upper portion of the rack 304 for engaging the lower end thereof, and The eccentric wheel 308 of the rocker 307 for driving the feeding member 306 is provided with the same two guiding grooves 309 on the side plate 305, and each of the guiding grooves 309 is divided into two left and right segments. The left section of the guide groove 309 is parallel to the rack 304, and the right section of the guide groove 309 is inclined upward. Two guides respectively sliding in the two guide grooves are fixed on the side wall of the feeding member 306. a pin 310, between the left end of the feeding member 306 and the left end of the side plate 305, a return spring 311 is provided, left at the cutting assembly 3a Between the housing and the housing of the cutting head 3 is provided with a first compression spring 6, between the right end of the clamping assembly 3b and the housing of the cutting head 3 is provided with a second compression spring 7; The cutting head 3 is rotatably connected to the transmission mechanism by a gear, and a rocker stopper 4 is disposed at a lower portion of the opening of the fuselage head 2, and a rocker reset magnet is disposed outside the right end of the rocker stopper 4 5, in the state in which the rocker 307 is pressed, the feeding member 306 is engaged with the rack 304, and the guide pin 310 is located at the left end of the left portion of the guide groove 309, and the rocker 307 is in the reset state. The feed member 306 is separated from the rack 304, and the guide pin 310 is located at the right end of the right portion of the guide groove 309.

The pipe cutter having the automatic feed magnetic force reset function of the above embodiment 2 employs a side plate with a guide groove, an eccentric wheel with a rocker for driving the feed member, a rocker baffle plate and a reset magnet, After the pipe to be cut is placed in the cutting head, the cutting head is driven to rotate clockwise by the transmission mechanism, and the free end of the rocker is rotated counterclockwise by the rocker baffle, and the eccentric wheel drives the feeding component to the left. The guide pin fixed to the component moves to the lower left along the right side of the guide groove, the feeding member meshes with the rack, the eccentric continues to drive the feeding member to the left, the guide pin moves to the left along the left side of the guide groove, and the feeding member drives the tooth The bar is moved to the left, and the clamp assembly fixed to the rack is moved to the left relative to the cutting assembly. When the rocker is turned counterclockwise to the limit position, the pressing state is entered, and the feeding member reaches the leftmost end, and the guide pin is located at this time. The left end of the left side of the guide groove, the clamp assembly fixed to the rack moves to the left with respect to the cutting assembly to the leftmost end, and the cutting assembly presses the rotary blade to the left through the pipe to be cut, so that the blade compression spring has a pre-compression , clamp the pipe to be cut, this When the cutting blade is controlled to stop, the rotary blade cutting switch is pressed, and the rotating blade starts to cut the pipe. Since the blade compression spring has a pre-compression, the rotating blade automatically feeds under the pressure of the blade pressing spring until the pipe is cut, and then the cutting is controlled. The cutter head rotates counterclockwise. When the free end of the rocker passes the reset magnet, the free end of the rocker is rotated clockwise to reset and enter the reset state. The eccentric releases the feed member, and the guide pin on the feed member is at the return spring. Under the action of the elastic force, return to the right end of the right section of the guide groove along the guide groove, and the feeding member moves to the rightmost end, because the feeding member is lifted upward along the right guide groove, and the rack is non-engaged with the rack, and the rack is fixed The integrated clamping assembly is in a non-clamped state and is ready for the next clamping of the pipe to be cut. Compared with the prior art described above, the present invention adopts a structure with a guide side plate, an eccentric wheel for driving the feeding member with a rocker, a rocker baffle and a reset magnet, and has a simple structure and a low cost. The cutting and resetting of the cutting pipe can be completed quickly and automatically, the cutting efficiency is high, and the labor intensity is small; the adoption of the reset magnet can not only realize the automatic reset of the rocker, but also does not generate noise due to no impact, which is beneficial to environmental protection and operation. The health of the person, the corresponding parts are not easily damaged, so the service life of the cutting head can be extended.

Claims

A pipe cutter comprising a fuselage (1), a power device and a transmission mechanism disposed in the body (1), and a cutting bit (3) disposed at the fuselage head (2), The cutting bit (3) comprises a cutting assembly (3a) provided with a rotary blade (301) and a blade compression spring (302), and a clamping assembly (3b) for holding the tubular member (303) to be cut, characterized in that : a rack (304) fixed to the clamping assembly (3b) and a side fixed to the cutting assembly (3a) at a movable engagement area of the cutting assembly (3a) and the clamping assembly (3b) a plate (305) having a feeding member (306) at a lower end of the rack (304) engageable with the lower end, and a rocker (307) disposed on the side plate (305) The eccentric (308) for driving the feeding member (306) is provided with the same two guiding grooves (309) on the side plate (305), and the guiding groove (309) is divided into the communicating left, In the right two segments, the left segment of the guide groove (309) is parallel to the rack (304), and the right segment of the guide groove (309) is inclined upward, in the The side wall of the component (306) is fixed with two guide pins (310) respectively sliding in the two guiding grooves, at the left end of the feeding member (306) and the side plate (305) A return spring (311) is disposed between the left end portions; the feeding member (306) is engaged with the rack (304) under the pressing state of the rocker (307), and the guide pin (310) Located at the left end of the left section of the guide groove (309), in the reset state of the rocker (307), the feeding member (306) is separated from the rack (304), and the guide pin (310) is located The right end of the right segment of the slot (309).
The pipe cutting machine according to claim 1, wherein a transmission link is provided between the transmission mechanism and the rocker (307).
A pipe cutting machine according to claim 1, wherein said cutting bit (3) is rotatably coupled to said transmission mechanism via a gear, and a rocker is provided at a lower portion of said opening of said body head (2) The stopper (4) is provided with a rocker reset magnet (5) outside the right end of the rocker stopper (4).
A pipe cutting machine according to claim 1 or 2 or 3, characterized in that a first compression spring is arranged between the left end of the cutting assembly (3a) and the casing of the cutting bit (3) ( 6) A second compression spring (7) is provided between the right end of the clamping assembly (3b) and the housing of the cutting bit (3).