Plastic pipe cutting device for welding machine

Abstract

The utility model discloses a plastic pipe cutting device for a welding machine, which comprises a machine body, and a motor and a cutterhead arranged on the machine body, and further comprises a transmission mechanism used for transmitting kinetic energy of the motor to the cutterhead, the transmission mechanism comprises a sleeve, a worm and a worm wheel, the sleeve is fixed in the machine body, the worm is rotatably connected in the sleeve, and the worm wheel is fixed in the machine body. One end of the worm is in transmission connection with an output shaft of the motor, an avoiding groove used for containing the turbine is formed in the outer circumferential face of the sleeve, the turbine fixed in the machine body is meshed with the worm, and the inner side wall of the cutter head is in transmission connection with the turbine. Kinetic energy of the motor is transmitted to the cutterhead through the turbine and the worm, the stability is higher, the precision of the end face of a cut pipeline is correspondingly high, and compared with belt or chain transmission, the plastic pipe cutting device of the welding machine is low in noise when working.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic pipe welding machines, and more specifically, it relates to a plastic pipe cutting device for a welding machine. Background Art

[0002] When two plastic pipes are hot-melt welded, the welding ends of the two plastic pipes need to be trimmed by a cutting device. The traditional plastic pipe cutting device includes a machine body, a cutter head and a motor installed on the machine body. The cutter head and the motor are driven by a belt. The cutter head is rotatably connected to the machine body through a bearing, and the motor is fixedly connected to the machine body.

[0003] During the use of the traditional plastic pipe cutting device, the torque of the motor cannot be perfectly transmitted to the cutter head, resulting in weak cutting force of the cutter head. In addition, the resistance generated when the cutter head cuts the plastic pipe reduces the rotation speed of the cutter head. When the rotation speed of the cutter head is different from that of the motor, the belt will shake, causing an increase in the vibration of the machine body and reducing the cutting accuracy of the pipe end face. Therefore, it is necessary to improve the traditional plastic pipe cutting device. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is that the traditional plastic pipe cutting device has small cutting force and large amplitude, so as to provide a plastic pipe cutting device for a welding machine to solve the above problems.

[0005] The technical solution adopted by the utility model to solve its technical problems is as follows:

[0006] A plastic pipe cutting device for a welding machine includes a machine body, a motor and a cutter head arranged on the machine body, and further includes a transmission mechanism for transmitting the kinetic energy of the motor to the cutter head.

[0007] The transmission mechanism includes a sleeve, a worm and a worm gear. The sleeve is fixed in the machine body. The worm is rotatably connected in the sleeve. One end of the worm is in transmission connection with the output shaft of the motor. An avoidance groove for placing the worm gear is formed on the outer circumferential surface of the sleeve. The worm gear fixed in the machine body meshes with the worm, and the inner side wall of the cutter head is in transmission connection with the worm gear.

[0008] Preferably: A transmission rod is coaxially and fixedly connected to the worm gear, and one end of the transmission rod is fixedly connected to the inner side wall of the cutter head.

[0009] Preferably: The worm gear includes a shaft cylinder and a plurality of teeth. The plurality of teeth are circumferentially and uniformly distributed on the outer circumferential surface of the shaft cylinder. An arc-shaped groove is formed at the middle position of the tooth crest of the teeth.

[0010] Preferably: Hanging ears are arranged on both sides of the cutter head on the machine body, and a self-locking mechanism is arranged on one or both of the hanging ears.

[0011] Preferably, the self-locking mechanism includes a ball rod, a compression spring and a pressing block. The rod-shaped end of the ball rod is inserted into the machine body and extends into the inside of the hanging ear. The top end of the pressing block is provided with a hollow, the compression spring is arranged in the hollow area of the pressing block, and the port of the hollow area of the pressing block is movably and limit-connected with the rod-shaped end of the ball rod.

[0012] Preferably, the transmission rod is key-connected to the shaft cylinder.

[0013] Preferably, the transmission rod is in interference fit with the shaft cylinder.

[0014] Preferably, the hanging ear is U-shaped, and the depth of the hanging ear is greater than its width.

[0015] The beneficial effects of the utility model are as follows: The use of a worm gear and a worm to transmit the kinetic energy of the motor to the cutter head has higher stability, and the precision of the cut pipe end face is also relatively high. Moreover, when the plastic pipe cutting device of the welding machine works, the noise is lower compared with belt or chain transmission. Description of the Drawings

[0016] Figure 1 It is a schematic diagram of a plastic pipe cutting device for a welding machine;

[0017] Figure 2 It is a schematic diagram of a transmission mechanism;

[0018] Figure 3 It is a schematic diagram of a worm gear;

[0019] Figure 4 It is a schematic diagram of the transmission of a worm gear and a worm;

[0020] Figure 5 It is a schematic diagram of a self-locking mechanism;

[0021] In the figure: 1, machine body; 11, hanging ear; 2, motor; 3, cutter head; 4, transmission mechanism; 41, sleeve; 42, worm; 43, worm gear; 44, transmission rod; 5, self-locking mechanism; 51, ball rod; 52, compression spring; 53, pressing block. Detailed Description of the Invention

[0022] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0023] It should be pointed out that unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0024] In the present utility model, unless otherwise specified, the directions such as "upper" and "lower" generally refer to the directions shown in the drawings, or to the vertical, perpendicular or gravitational directions; similarly, for the convenience of understanding and description, "left" and "right" generally refer to the left and right shown in the drawings; "inner" and "outer" refer to the inner and outer of the contour of each component itself, but the above direction terms are not used to limit the present utility model.

[0025] As shown in Figures 1-5 the figure, a plastic pipe cutting device for a welding machine includes a machine body 1, a motor 2 and a cutter head 3 arranged on the machine body 1, and further includes a transmission mechanism 4 for transmitting the kinetic energy of the motor 2 to the cutter head 3. The transmission mechanism 4 includes a sleeve 41, a worm 42 and a worm wheel 43. The machine body 1 includes an upper shell and a lower shell. The upper shell is provided as the outer shell of the motor 2. The lower shell is made of aluminum material. The cutter head 3 made of aluminum material is rotatably connected to the lower shell. The transmission mechanism 4 is arranged in the lower shell. A protective cylinder is sleeved on the output shaft of the motor 2, and the protective cylinder plays a role in connecting the upper shell and the lower shell. The output shaft of the motor 2 extends into the lower shell and is in transmission connection with the transmission mechanism 4. Hanging ears 11 are arranged on both sides of the lower shell where the cutter head 3 is located. A self-locking mechanism 5 is arranged on one of the hanging ears 11 or both of the hanging ears 11. The hanging ear 11 is provided in a U shape, and the depth of the hanging ear 11 is greater than its width.

[0026] As shown in Figures 2-4 the figure, the worm 42 is rotatably connected in the sleeve 41. One end of the worm 42 is coaxially and fixedly connected to the output shaft of the motor 2. An avoidance groove for placing the worm wheel 43 is formed on the outer circumferential surface of the sleeve 41. The worm wheel 43 includes a shaft cylinder and a plurality of teeth. The plurality of teeth are circumferentially and evenly distributed on the outer circumferential surface of the shaft cylinder. An arc-shaped groove is formed in the middle position of the tooth crest of the tooth. The teeth of the worm wheel 43 are engaged with the threads of the worm 42. The arc-shaped teeth can increase the contact area with the threads, so that the torque of the transmission between the worm wheel 43 and the worm 42 is greater. A transmission rod 44 is coaxially and fixedly connected to the worm wheel 43. One end of the transmission rod 44 is fixedly connected to the inner side wall of the cutter head 3, and the other end of the transmission rod 44 is key-connected or interference-fitted with the shaft cylinder. In the present utility model, the connection mode between the transmission rod 44 and the shaft cylinder adopts interference fit.

[0027] As shown in Figure 5As shown in the figure, the self-locking mechanism 5 includes a ball rod 51, a compression spring 52 and a pressing block 53. The rod-shaped end of the ball rod 51 is inserted into the machine body 1 and extends into the inside of the hanging ear 11. The top end of the pressing block 53 is hollowly arranged. The compression spring 52 is arranged in the hollow area of the pressing block 53. The port of the hollow area of the pressing block 53 is movably and limit-connected to the rod-shaped end of the ball rod 51. The ball rod 51 is composed of a ball head fixedly connected to one end of a round rod. When the hanging ear 11 is installed on the hydraulic piston rod of the welding machine, hold the handle of the upper shell, so that the inner side wall of the hanging ear 11 abuts against the circumferential surface of the hydraulic piston rod, thereby preventing the plastic pipe cutting equipment from shaking during pipe cutting. The self-locking mechanism 5 is provided to prevent the hanging ear 11 from sliding on the hydraulic piston rod. When the hanging ear 11 is installed on the hydraulic piston rod of the welding machine, the pressing block 53 abuts against the hydraulic piston rod under the action of the compression spring 52. The pressing block 53 is arranged in an arc shape, so as to increase the contact area between the inner side surface of the pressing block 53 and the hydraulic piston rod. An internal threaded hole is opened on the outer arc surface of the pressing block 53, and an external threaded section for threadedly connecting with the internal threaded hole is arranged at the free end of the ball rod 51. In addition, a placement hole, that is, a hollow area, is opened at the position of the hanging ear 11 on the lower shell. A limit thread is arranged on the ball rod 51, and the limit thread is arranged at an interval from the external threaded section. A limit internal thread for cooperating with the limit thread is arranged at the outer hole opening of the placement hole to prevent the compression spring 52 from jumping out of the placement hole when releasing elastic force.

[0028] Combined with Figures 1-5 As shown in the figure, using the worm gear 43 and the worm 42 to transfer the kinetic energy of the motor 2 to the cutter head 3 has higher stability, and the accuracy of the cut pipe end face is also relatively high. Moreover, when the plastic pipe cutting device of this welding machine works, the noise is lower compared with belt or chain drive.

[0029] It should be noted that the terms used here are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used here, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0030] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of the present application are used to distinguish similar objects and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here.

[0031] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A plastic pipe cutting device for a welding machine, comprising a machine body (1) and a motor (2) and a cutter disc (3) arranged on the machine body (1), wherein: It also includes a transmission mechanism (4) for transmitting kinetic energy of the motor (2) to the cutter disc (3). The transmission mechanism (4) comprises a sleeve (41), a worm (42) and a worm wheel (43); the sleeve (41) is fixed in the machine body (1); the worm (42) is rotatably connected in the sleeve (41); one end of the worm (42) is drivingly connected to the output shaft of the motor (2); an escape groove for accommodating the worm wheel (43) is provided on the outer circumferential surface of the sleeve (41); the worm wheel (43) fixed in the machine body (1) is meshed with the worm (42); and the inner side wall of the cutter disc (3) is drivingly connected to the worm wheel (43).

2. The plastic pipe cutting device for a welding machine according to claim 1, characterized in that: A transmission rod (44) is coaxially and fixedly connected to the worm wheel (43), and one end of the transmission rod (44) is fixedly connected to the inner side wall of the cutter disc (3).

3. The plastic pipe cutting device for a welding machine according to claim 2, characterized in that: The worm wheel (43) comprises a shaft cylinder and a plurality of teeth, wherein the plurality of teeth are evenly distributed on the outer circumferential surface of the shaft cylinder, and an arc-shaped groove is provided at the middle position of the tooth peak of the teeth.

4. The plastic pipe cutting device for a welding machine according to claim 3 is characterized in that: The machine body (1) is provided with hanging ears (11) on both sides of the cutter disc (3), and a self-locking mechanism (5) is provided on one of the hanging ears (11) or both hanging ears (11).

5. The plastic pipe cutting device for a welding machine according to claim 4, characterized in that: The self-locking mechanism (5) comprises a ball rod (51), a compression spring (52) and a pressure block (53); a rod-shaped end of the ball rod (51) is inserted into the machine body (1) and extends into the interior of the hanging ear (11); the top end of the pressure block (53) is hollow; the compression spring (52) is arranged in the hollow area of ​​the pressure block (53); and a port in the hollow area of ​​the pressure block (53) is movably limitedly connected to the rod-shaped end of the ball rod (51).

6. The plastic pipe cutting device for a welding machine according to claim 5, characterized in that: The transmission rod (44) is key-connected to the shaft cylinder.

7. The plastic pipe cutting device for a welding machine according to claim 5, characterized in that: The transmission rod (44) is interference fit with the shaft cylinder.

8. The plastic pipe cutting device for a welding machine according to claim 6 or 7, characterized in that: The hanging ear (11) is arranged in a U shape, and the depth of the hanging ear (11) is greater than its width.

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