WO2015010616A1

WO2015010616A1 - Multi-head pipe cutter

Info

Publication number: WO2015010616A1
Application number: PCT/CN2014/082786
Authority: WO
Inventors: 唐敏
Original assignee: Tang Min
Priority date: 2013-07-23
Filing date: 2014-07-23
Publication date: 2015-01-29
Also published as: CN103394752A; CN103394752B

Abstract

Disclosed is a multi-head pipe cutter having multiple pipe-cutting units for cutting pipe-shaped materials simultaneously, relating to the technical field of pipe-shaped material machining. The pipe cutter comprises a machine frame (100), a motive power device (110) and at least two sets of pipe-cutting units (120), wherein the motive power device (110) and the pipe-cutting units (120) are both mounted on the machine frame (100); each pipe-cutting unit (120) comprises a transmission device (121) and a cutting device (122); the cutting device (122) is mounted on the transmission device (121); and the motive power device (110) is connected to the transmission devices (121) in the various pipe-cutting units (120), respectively. Only one motive power device (110) is required to directly drive the transmission devices (121) in all of the pipe-cutting units (120), thereby driving the cutting devices (122) to cut off pipe-shaped materials to be machined. As a result, the cost is effectively reduced, and opportunity of failure is greatly decreased.

Description

Multi-head pipe cutting machine

Technical field

The invention relates to the technical field of tubular material processing, in particular to a multi-head pipe cutter having a plurality of pipe cutting units and simultaneously cutting a tubular material.

Background technique

In the processing industry of pipes, especially metal pipes, it is often necessary to cut pipes in accordance with certain size requirements. This simple and repetitive work was done entirely by manual cutting in the early days. Subsequently, there was a device on the market dedicated to cutting pipes, namely a pipe cutter.

The pipe cutting machine mainly comprises a frame, and a set of pipe cutting unit is installed on the frame, which mainly comprises a motor, a worm gear and a saw blade, and the motor is decelerated by the worm gear and drives the saw blade to rotate, and then the manual or control mechanism is to be used. The processed pipe is sent to the saw blade for cutting piece by piece. Although this kind of cutting machine realizes certain automation, it can only cut one section at a time. If a pipe needs to be cut into multiple sections, it needs multiple cutting, which is slow and low in efficiency.

In this regard, the prior art also provides a multi-head pipe cutting machine, which comprises a frame, a control mechanism, an induction mechanism, a plurality of sets of cutting mechanisms, a feeding mechanism, a plurality of sets of clamping mechanisms and a receiving mechanism. During operation, the pipe material is pre-placed on the discharge bracket. After the equipment is started, the pipe material enters the feeding guide rail until the feeding plate triggers the induction device, and then the control mechanism starts the feeding cylinder and the clamping cylinder to lift the pipe material, and at the same time, controls The mechanism also drives a plurality of sets of cutting mechanisms. The hydraulic cylinder pushes the motor, the reducer, the saw blade through the slide rails, the saw blade cuts off the pipe material, and then returns from the slide rail, and the cut pipe material is automatically collected by the receiving mechanism.

This multi-head pipe cutting machine can cut the pipe material once and is more efficient. However, its defects are also obvious: First, each set of cutting mechanism needs to be equipped with a motor, the cost is very high, and as long as one of these motors fails or is damaged, the entire equipment must be shut down for maintenance, and the failure rate is very high; Secondly, when cutting work, it is necessary to push the entire cutting mechanism including the motor to push the working load of the cylinder and damage the motor. Finally, in order to move the entire cutting mechanism, it is necessary to The cutting mechanism of the table is equipped with slide rails, which makes the structure of the whole equipment extremely complicated and has high manufacturing and maintenance costs.

technical problem

The technical problem to be solved by the present invention is to provide a multi-head pipe cutting machine which is not only simple in structure, easy to manufacture and maintain, but also reliable in operation and low in failure rate.

Technical solution

A multi-head pipe cutting machine is provided, which comprises a frame, a power device, a pushing device and at least two sets of pipe cutting units, wherein the power device, the pushing device and the pipe cutting unit are all mounted on a frame, the pipe cutting tube The unit includes a transmission device and a cutting device, the cutting device is mounted on the transmission device, and the power device is respectively connected with a transmission device in each pipe cutting unit, and the pushing device can make the pipe cutting unit The cutting device moves relative to the pipe to be cut.

As an improvement, the multi-head pipe cutter includes two or more of the pushing devices respectively corresponding to the pipe cutting unit, the power device includes a motor and a speed reducer connected to the motor, the deceleration The machine includes an output shaft, wherein the transmissions of the respective tube cutting units are movably mounted on the output shaft, the pushing device is coupled to the transmission device, and the cutting device is urged to move relative to the power device. In this way, each pushing device can perform the sawing work by pushing the transmission in the corresponding pipe cutting unit to push the cutting device to move.

Further preferably, the multi-head pipe cutter further includes a one-way bearing, and the power device drives the transmission device and the cutting device in the pipe cutting units through the one-way bearing, so that only the power device and the transmission device can be single To the drive. The repulsive force generated when cutting the pipe will not act on the cutting device, but will be absorbed by the one-way bearing, which causes the cutting device to no longer bear both positive and negative forces. Compared with the prior art, the pressure of the cutting device is greatly reduced, and the service life of the cutting device is effectively improved.

As a preferred improvement described above, the multi-head pipe cutter includes at least two one-way bearings respectively corresponding to the respective pipe cutting units, and the transmission device includes a casing and a transmission shaft, the one-way bearing Each includes an outer ring and an inner ring, and the inner ring is sleeved on the transmission shaft, and the outer ring is tightly engaged with the casing. Although the drive shaft may be the output shaft of the power unit, it may also be the drive shaft in the transmission between the power unit and the cutting unit, but the latter is better than the former. When cutting, the inner ring rotates with the drive shaft. When the rebound force occurs, the friction between the outer ring and the casing will cancel the rebound force of the drive shaft to the inner ring.

As another improvement, the rack is further provided with a feeding device, the feeding device comprises a guiding transmission shaft, a pulling cylinder and at least two guiding units, and the guiding unit comprises a guiding material. a plate, a gear mounted on the guide drive shaft, and a rack meshing with the gear, the guide plate is movably connected to the rack, the pull cylinder can drive the gear and pass the tooth The strip drives the guide plate to rotate to achieve the guide. This can further improve the automation of the present invention.

Further preferably, the transmission device comprises a first transmission gear, a second transmission gear and a third transmission gear, wherein the first transmission gear is mounted on the output shaft of the reduction gear, the second transmission gear, and the third The transmission gears are respectively meshed with the first transmission gear and the second transmission gear, and the relative positions between the first transmission gear, the second transmission gear and the third transmission gear are fixed, and the cutting device is mounted on the gear of the third transmission gear. On the shaft. The use of a combination of three gears can reduce the size of the gears, thereby reducing the impact on the operation of the cutting device.

Further, the transmission device further includes a fixing plate connected to the two ends of the gear shafts of the first transmission gear, the second transmission gear and the third transmission gear, and the pushing device is connected to the fixing plate. The cutting device can be pushed to rotate around the output shaft of the reducer.

Further, the fixing plate is provided with a pushing gear, and the pushing device is connected with a rack, and the rack meshes with the pushing gear. In this way, the cutting can be completed by pushing the rack and the gear to rotate the cutting device.

Another preferred embodiment, the transmission device includes a first transmission gear, a second transmission gear and a third transmission gear, wherein the first transmission gear is mounted on the output shaft of the reducer, the second transmission gear, and the third The transmission gears are respectively meshed with the first transmission gear and the second transmission gear, and the relative positions between the first transmission gear, the second transmission gear and the third transmission gear are variable, and the cutting device is mounted on the third transmission gear. On the gear shaft. Since the relative position between the first, second and third transmission gears is variable, the gear shaft of the third transmission gear and the cutting device can be translated.

Further improved, the transmission device further includes a fixing plate slidably mounted on the frame and fitted at two ends of the gear shaft of the third transmission gear, the transmission device further including a first a rocking mechanism and a second rocking mechanism, wherein the first rocking mechanism is respectively connected to the gear shafts of the first transmission gear and the second transmission gear, and the second swing mechanism is respectively coupled to the gears of the second transmission gear and the third transmission gear The axes are connected. In this way, the gear shaft of the third transmission gear and the cutting device are translated by the sway of the rocking mechanism.

The features of the present invention will be more readily understood and understood by the following description of the appended claims.

Beneficial effect

With such a structure, only one power unit is required to directly drive the transmissions in all the pipe cutting units, thereby driving the cutting device to cut the pipe to be processed. Compared with the prior art, no matter how many sets of pipe cutting units, only one power device is needed, which not only effectively reduces the cost, but also reduces the probability of failure.

DRAWINGS

1 is a partial structural schematic view of a first embodiment of the present invention;

Figure 2 is an enlarged schematic view showing a partial structure of Figure 1;

Figure 3 is a schematic view showing a further improved structure of the first embodiment provided by the present invention;

Figure 4 is a schematic view showing another modified structure of the first embodiment provided by the present invention;

Figure 5 is a partial structural view of a second embodiment of the present invention;

Figure 6 is a schematic cross-sectional view showing the partial structure of Figure 5;

Figure 7 is a partial structural view showing a third embodiment of the present invention;

Figure 8 is a schematic view showing a third modified structure of the first embodiment provided by the present invention;

Figure 9 is a schematic cross-sectional view showing the structure of Figure 8;

Fig. 10 is a view showing a fourth modified structure of the first embodiment provided by the present invention.

Embodiments of the invention

In order to make the technical problems, technical solutions, and advantages of the present invention more comprehensible, the present invention will be further described in detail below with reference to the accompanying drawings. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

All figures show only those parts that are closely related to the present invention, rather than the overall structure of the pipe cutter. A first embodiment of the invention as shown in Figures 1-4 is a multi-head pipe cutter. As shown, it includes a frame 100, a power unit 110, a pushing unit 130, and at least two sets of tube cutting units 120. The structure of the pipe cutting unit 120 can be the same, and the number can be determined according to actual needs, and five sets are shown in FIG. Generally, multiple sets can be configured. In actual use (before the sawing work), the position can be increased, decreased, and moved according to the number of segments to be cut.

The power unit 110 and the pipe cutting unit 120 are all mounted on the frame 100. The power unit 110 can be selected in the prior art according to actual needs, such as an electric motor, a pneumatic machine, or the like. The power unit 110 in this embodiment includes a motor 111 and a speed reducer 112. One end of the reducer 112 is connected to the motor 111, and the other end is connected to a transmission in each of the pipe cutting units 120. The speed reducer 112 can be selected in the prior art as needed, and the speed reducer 112 in the present embodiment is a planetary speed reducer. With such a reducer, the failure rate is low and the transmission efficiency is high. Each of the tube cutting units 120 has the same structure (refer to FIG. 2 with emphasis), and both include a transmission device 121 and a cutting device 122. In this embodiment, the cutting device 122 is a saw blade. The cutting device 122 is mounted on a transmission device 121 that is coupled to a transmission 121 in each of the tube cutting units 120, respectively.

The pushing device 130 can be selected as needed, and in the present embodiment is a hydraulic cylinder. The pushing device 130 is mounted on the frame 100 and can relatively move between the cutting device 122 in the pipe cutting unit 120 and the pipe 200 to be cut. The number of pushing devices 130 is determined depending on whether the cutting device 122 or the tubing 200 is being pushed. If the cutting device 122 is pushed, the number should be the same as the number of the pipe cutting units 120; if the pipe is pushed, it can be as few as one. In this embodiment, the number of the pushing device 130 and the pipe cutting unit 120 are the same, and there are five.

In this way, only one power unit 110 is needed to directly drive the transmission unit 121 of all the pipe cutting units 120, thereby driving the cutting device 122 to cut the pipe 200 to be processed. Such tubing 200 may be metallic or non-metallic; the cross section may be circular or square or polygonal. Compared with the prior art, no matter how many sets of pipe cutting units 120 are provided, only one power unit 110 needs to be provided, which not only effectively reduces the cost, but also reduces the probability of failure.

In more detail, the speed reducer 112 includes an output shaft 113 (please refer to FIG. 1), and the transmission device 121 in each of the pipe cutting units 120 is movably mounted on the output shaft 113, so-called "active" "It means that during operation, the transmission 121 can not only transmit the rotational force of the power unit 110, but also can move relative to the power unit 110 at a relative position. The pushing device 130 is coupled to the transmission 121 and can push the cutting device 122 to move relative to the power unit 110. During operation, the motor 111 drives the output shaft 113 of the reducer 112 to rotate, thereby driving the transmission 121 in each of the pipe cutting units 120. As shown in FIGS. 1 to 3, the output shaft 113 in the transmission 121 is generally a circular shaft, but other prior art may be used. As a preferred, the output shaft 113 of the reduction gear 112 has a square or polygonal cross section. It can be matched directly to the gear, and the gear can be mounted on it without the need for a flat key or the like. Each of the pushing devices 130 can perform the sawing work by pushing the transmission device 121 in the corresponding pipe cutting unit 120 to push the cutting device 122 to move.

As a further refinement of the above improvements, the transmission 121 includes at least two gears, and the urging means 130 can push the cutting device 122 to rotate relative to the power unit 110 so as to be rotatable to move the tube 200 to be processed until it is severed. This structure uses a common gear set transmission to replace the traditional worm gear transmission structure, which can significantly improve the efficiency of the transmission and is not easily damaged.

As shown in FIG. 4, in an alternative to this embodiment, the transmission 121 includes two gears, a first transmission gear 123 and a second transmission gear 124. The first transmission gear 123 is mounted on the output shaft 113 of the speed reducer 112, that is, the output shaft 113 serves as a gear shaft of the first transmission gear 123. The second transfer gear 124 meshes with the first transfer gear 123, and the cutting device 122 is mounted on the gear shaft of the second transfer gear 124 and is rotatable with the gear shaft. The pushing device 130 can push the cutting device 122 to rotate relative to the power device 110 so as to be movable in a rotatable manner to the pipe 200 to be processed until it is severed.

Since the combination of the two gears requires a large gear size, it will affect the range in which the cutter can be cut. Therefore, the present embodiment adopts another preferred solution. The transmission device 121 includes three transmission gears. Referring to FIG. 2, the first transmission gear 123, the second transmission gear 124, and the third transmission gear 125 are included. The first transmission gear 123 is mounted on the output shaft 113 of the reduction gear 112, that is, the output shaft 113 of the reduction gear 112 as its gear shaft. The second transmission gear 124 is meshed with the first transmission gear 123, and the third transmission gear 125 is meshed with the second transmission gear 124. The relative position between the first transmission gear 123, the second transmission gear 124 and the third transmission gear 125 is fixed, that is, the three transmission gears are rotated together, and no relative movement occurs between the three. The cutting device 122 is mounted on the gear shaft of the third transfer gear 125 and is rotatable with the gear shaft. The use of a combination of three gears can reduce the size of the gears, thereby reducing the impact on the operation of the cutting device 122.

As a further improvement of the above improvements, the transmission 121 may further include a fixing plate 126. The fixing plate 126 is connected to both ends of the gear shaft of the first transmission gear 123, the second transmission gear 124, and the third transmission gear 125. Specifically, the structure of the fixing plate 126 can be selected according to the prior art. For example, the two plates can be respectively installed at the two ends of the gear shaft of the three transmission gears, or can be a box body, and three transmission gears are used. They are all installed therein, and both ends of the gear shaft are respectively mounted on the two side plates of the box. The pushing device 130 is connected to the fixing plate 126. In detail, as shown in FIGS. 1 and 2, the pushing device 130 can use an oil cylinder, one end of which is rotatably mounted on the frame 100, and the other end is movably connected to the fixing plate 126. That is, when the cylinder pushes the fixed plate 126 to rotate, both ends of the cylinder can rotate accordingly, thereby finally achieving the output shaft 113 that pushes the cutting device 122 around the reducer 112, that is, the gear shaft of the first transmission gear 123. Turn.

As another improvement described above, please refer to FIG. 3. The fixing plate 126 is provided with a pushing gear 127. Specifically, the improvement is that an independent gear is additionally fixed on the fixing plate 126, and the rotation of the gear 127 is also driven to drive the rotation of the fixing plate 126. Of course, as an alternative, the corresponding portion of the fixed plate 126 can also be machined into a gear (not shown). In order to match the gear, a rack 128 is attached to the pushing device 130, i.e., the cylinder, and the rack 128 is engaged with the push gear 127. Thus, the rack 128 can be pushed by the cylinder, and the gear 127 can be pushed to rotate the cutting device 122 around the output shaft 113 of the speed reducer 112, that is, the gear shaft of the first transmission gear 123, to complete the cutting.

Figures 5 and 6 show a second embodiment of the present invention, which is a tube machine. Compared to the first embodiment, the difference is that the transmission 121 includes at least three gears that can push the cutting device 122 to translate relative to the power unit 110. The translation is relative to the rotation of the first embodiment, and it is not necessarily horizontal as long as it is linear. That is to say, the cutting device 122 of the present embodiment, that is, the saw blade, is in a translational manner, and as shown in FIG. 5, is moved horizontally to the pipe 200 to be processed (see FIG. 6). The two gears are unable to translate the cutting device 122. Therefore, in the present embodiment, the transmission device 121 must have at least three gears.

More specifically, as shown in Fig. 6, the transmission 121 includes a first transmission gear 123', a second transmission gear 124', and a third transmission gear 125'. The first transmission gear 123' is mounted on the output shaft 113 of the reduction gear 112, the second transmission gear 124' is meshed with the first transmission gear 123', and the third transmission gear 125' is in meshing engagement with the second transmission gear 124'. To achieve the transmission of power. In order to achieve the purpose of shifting the gear shaft of the third transfer gear 125' and the cutting device 122, the relative position between the first transfer gear 123', the second transfer gear 124' and the third transfer gear 125' should be variable. The cutting device 122, i.e., the saw blade, is mounted on the gear shaft of the third transfer gear 125' and is rotatable therewith.

As a further improvement, the transmission device 121 further includes a first rocking mechanism 141 and a second rocking mechanism 142, and the first rocking mechanism 141 and the gear shaft of the first transmission gear 123' and the second transmission gear 124', respectively. Connected, the second swinging mechanism 142 is coupled to the gear shafts of the second transmission gear 124' and the third transmission gear 125', respectively. Thus, the relative position between the first transmission gear 123', the second transmission gear 124', and the third transmission gear 125' should be made variable.

More specifically, the transmission device 121 further includes a fixing plate 126', and the first rocking mechanism 141 and the second rocking mechanism 142 each include two rocking pieces. For details, refer to FIG. 6 (only the figure is shown). a swinging piece). The fixing plate 126' is slidably mounted on the frame and fitted over both ends of the gear shaft of the third transmission gear 125'. The fixing plate 126' can be slidably mounted on the frame by using various solutions provided by the prior art, for example, a sliding rail is disposed on the frame, and the fixing plate 126' can be translated along the sliding rail; or sliding can be used. To achieve. The two rocking pieces of the first rocking mechanism 141 are respectively disposed at two ends of the gear shafts of the first transmission gear 123' and the second transmission gear 124', and the two rocking pieces of the second rocking mechanism 142 are respectively set in the Both ends of the gear shaft of the second transmission gear 124' and the third transmission gear 125'. Thus, the gear shaft of the third transmission gear 125' and the cutting device 122 are translated by the sway of the rocking piece.

As shown in FIG. 7, a third embodiment of the present invention is different from the first embodiment in that the entire pipe cutting unit 120 is fixed to the frame 100 during operation, and the pushing device 130' is installed close to One side of the pipe 200. Thereby, the tube 200 to be cut can be pushed toward the rotating cutting device 122, thereby completing the cutting.

A third modification of the first embodiment of the present invention is shown in Figures 8 and 9, which further includes a one-way bearing 150. After the power device 110 outputs power, the transmission device 121 and the cutting device 122 in each of the pipe cutting units 120 are driven by the one-way bearing 150. This improvement causes the repulsive force generated when the tube is cut to not act on the cutting device 122, but is absorbed by the one-way bearing 150, which causes the cutting device 122 to no longer be subjected to both positive and negative forces. Compared with the prior art, the pressure of the cutting device 122 is greatly reduced, and the service life of the cutting device 122 is effectively improved.

As a further preferred embodiment of the above aspect, the multi-head pipe cutting machine includes at least two one-way bearings 150 respectively corresponding to the respective pipe cutting units 120, that is, each pipe cutting unit 120 has a single corresponding thereto. To the bearing 150. The transmission device 121 of each of the pipe cutting units includes a casing 143 and a transmission shaft 142. Each of the one-way bearings 150 includes an outer ring 151 and an inner ring 152 (refer to FIG. 9). A roller 153 is provided between the 152 and the outer ring 151 (please refer to FIG. 8).

When not assembled, the inner ring 152 can drive the outer ring 151 to rotate in a certain direction by the action of the roller 153, and the inner ring 152 can be idling in the opposite direction, and the outer ring 151 does not follow the rotation. When installed, the inner ring 152 is fitted on the drive shaft 142, and the outer ring 151 is tightly engaged with the casing 143, and ensures that the inner ring 152 is idling when the saw blade is rotationally cut, and is not affected by the outer ring 151. Interference; and when the saw blade is reversed, the outer ring 151 can stop the rotation of the inner ring 152. Thus, during the cutting operation, the inner ring 152 will follow the drive shaft 142 without being affected by the outer ring 151; when the rebound force occurs, the friction between the outer ring 151 and the casing 143 will cancel the drive shaft 142 to the inside. The rebound force of the ring 152. Although the one-way bearing 150 can be directly mounted on the output shaft of the power unit 110, the effect is not as good as that of the transmission shaft mounted in the transmission unit 121, and of course, it is particularly preferable to be mounted on the transmission shaft that connects the cutting unit 122.

FIG. 10 is a fourth modification of the first embodiment of the present invention. The rack 100 is further provided with a feeding device 160. The feeding device 160 includes a guiding transmission shaft 161, a drawing cylinder 162 and at least two guiding units 163. In this embodiment, there are three guide units 163, each of the guide units 163 includes a guide plate 164, a gear 165 mounted on the guide transmission shaft 161 and meshing with the gear. a rack 166. One end of the guide plate 164 is rotatably connected to the frame 100, and the other end is movably connected to the rack 166. The push rod of the pull cylinder 162 is also provided with a rack for driving the gear 165. Further, in order to cooperate with the meshing connection of the gear and the rack, two pulleys 167 may be disposed. Thus, the pulling cylinder can push the gear 165 to rotate, and drive the other gears 165 through the guide transmission shaft 161, thereby driving the guiding units. The rack 166 pushes the guide plate 164 up and down to allow the material placed on the guide plate 164 to automatically slide down to the feeding position, thereby further improving the automation of the present invention.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. Within the scope.

Claims

A multi-head pipe cutting machine comprises a frame, a power device, a pushing device and at least two sets of pipe cutting units, wherein the power device, the pushing device and the pipe cutting unit are all mounted on the frame, the pipe cutting tube The unit includes a transmission device and a cutting device, the cutting device being mounted on the transmission device, wherein the power device is respectively connected to a transmission device in each pipe cutting unit, and the pushing device can make the The cutting device in the tube cutting unit moves relative to the tube to be cut.
The multi-head pipe cutting machine according to claim 1, wherein the multi-head pipe cutting machine comprises two or more of the pushing devices respectively corresponding to the pipe cutting unit, the power device comprising a motor and a a speed reducer connected to the motor, the speed reducer includes an output shaft, wherein a transmission device in each of the pipe cutting units is movably mounted on the output shaft, and the pushing device is connected to the transmission device and can be driven The cutting device moves relative to the power device.
The multi-head pipe cutting machine according to claim 1, wherein the multi-head pipe cutting machine further comprises a one-way bearing, and the power device drives the transmission device and the cutting in the pipe cutting units through the one-way bearing The device allows only one-way transmission between the power unit and the transmission.
The multi-head pipe cutting machine according to claim 3, wherein the multi-head pipe cutting machine comprises at least two one-way bearings respectively corresponding to the respective pipe cutting units, and the transmission device comprises a casing And a transmission shaft, the one-way bearing comprises an outer ring and an inner ring, the inner ring is sleeved on the transmission shaft, and the outer ring is fastened with the casing.
The multi-head pipe cutting machine according to claim 1, wherein the frame is further provided with a feeding device, wherein the feeding device comprises a guiding transmission shaft, a pulling cylinder and at least two guiding units. The guiding units all include a guiding plate, a gear mounted on the guiding transmission shaft and a rack meshing with the gear, the guiding plate is movably connected with the rack, and the pulling The material cylinder can drive the gear and drive the guide plate through the rack to achieve feeding.
The multi-head pipe cutting machine according to claim 2, wherein the transmission device comprises a first transmission gear, a second transmission gear and a third transmission gear, wherein the first transmission gear is mounted at the deceleration On the output shaft of the machine, the second transmission gear and the third transmission gear are respectively meshed with the first transmission gear and the second transmission gear, and the relative positions between the first transmission gear, the second transmission gear and the third transmission gear are fixed. The cutting device is mounted on a gear shaft of the third transmission gear.
A multi-head pipe cutting machine according to claim 6, wherein said transmission device further comprises a fixing plate connected to both ends of the gear shaft of the first transmission gear, the second transmission gear and the third transmission gear The pushing device is connected to the fixing plate and can push the cutting device to rotate around the output shaft of the speed reducer.
The multi-head pipe cutting machine according to claim 7, wherein the fixing plate is provided with a pushing gear, and the pushing device is connected with a rack, and the rack meshes with the pushing gear.
The multi-head pipe cutting machine according to claim 2, wherein the transmission device comprises a first transmission gear, a second transmission gear and a third transmission gear, wherein the first transmission gear is mounted on the reduction gear On the output shaft, the second transmission gear and the third transmission gear are respectively meshed with the first transmission gear and the second transmission gear, and the relative position between the first transmission gear, the second transmission gear and the third transmission gear is variable. The cutting device described is mounted on the gear shaft of the third transmission gear.
A multi-head pipe cutting machine according to claim 9, wherein said transmission further comprises a fixing plate slidably mounted on said frame and fitted to the gear of the third transmission gear The transmission device further includes a first rocking mechanism and a second rocking mechanism, wherein the first rocking mechanism is respectively connected to the gear shafts of the first transmission gear and the second transmission gear, and the second rocking mechanism They are respectively connected to the gear shafts of the second transmission gear and the third transmission gear.