Crawler pull machine

Abstract

The present invention discloses a crawler-type pulling machine, which belongs to the field of mechanical processing and is capable of enhancing the stability of equipment during drawing and extending the service life of the equipment. The crawler-type pulling machine of the present invention comprises a frame, wherein an upper and a lower support frame is arranged on the frame, an outer crawler for clamping and drawing a pipe is arranged on the outer periphery of the support frame, an inner crawler for reducing the friction generated during transmission is arranged between the outer crawler and the support frame, a movable clamping device is arranged on the frame between the two support frames, the clamping device is used to clamp the end of the pipe just inserted into the frame, and pull the pipe to move to complete the initial drawing, a plurality of synchronous rotating arms connected to the two support frames are arranged on the frame, and the plurality of synchronous rotating arms can drive the two support frames to open and close relative to each other in the vertical direction when rotating, the clamping device can move when the two support frames are separated, and the two support frames can clamp and draw the pipe when combined.

Description

[Technical field]

[0001] The invention relates to the field of mechanical processing, in particular to a crawler belt pulling machine. [Background technology]

[0002] The existing drawing machines have insufficient overall stability during drawing operation, making it difficult to ensure the quality of the produced pipes. In addition, during operation, the huge friction will cause wear on the equipment. The heat generated by the friction will also affect the normal use of the equipment, reducing the life of the equipment and some parts, and requiring a lot of time and manpower and material resources for maintenance.

[0003] In the initial stage of drawing, there is a lack of drawing of the tube, and the end length of the tube formed by die extrusion is only a small section, which makes it difficult to easily enter the normal production process. A lot of time will be spent in this step, reducing production efficiency. [Summary of the invention]

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and propose a crawler-type pulling machine, thereby enhancing the stability of the equipment during pulling and extending the service life of the equipment.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] The crawler pulling machine comprises a frame, wherein two support frames are arranged at intervals in an upper and lower direction, and outer crawlers for clamping and pulling pipes are arranged on the outer circumferences of the two support frames, and inner crawlers for reducing the friction generated during transmission are arranged between the outer crawlers and the support frames, and a movable clamping device is arranged on the frame between the two support frames, and the clamping device is used to clamp the end of the pipe just inserted into the frame and pull the pipe to move to complete the initial drawing, and a plurality of synchronous rotating arms connected to the two support frames are arranged on the frame, and when the plurality of synchronous rotating arms rotate, the two support frames can be driven to open and close relative to each other in the vertical direction, and the clamping device can move when the two support frames are separated, and can clamp and pull the pipes when the two support frames are combined.

[0007] The crawler pulling machine is used to pull the pipe, reduce the diameter and wall thickness of the pipe, and pull the short thick pipe into a long thin pipe. The pipe can be clamped by the outer crawler, and as the outer crawler is driven, the clamped pipe is pulled. There will be uninterrupted friction between the outer crawler and the support frame during transmission. After long-term use, the support frame and the outer crawler will have great wear and tear, and will also generate great heat. In addition, it takes a lot of energy to overcome the friction. The inner crawler is located between the outer crawler and the support frame, and the outer crawler is driven on the outside of the inner crawler. The contact area between the outer crawler and the inner crawler is small, so the wear will be less. The jaw device is used to clamp the pipe in the initial stage of pipe drawing, and then start to move with the pipe, which can ensure that the outer crawler can be stably pulled, and the movement of the jaw device will collide with the support frame. For this reason, the upper and lower support frames can open and close relative to each other in the vertical direction, which is convenient for the movement of the jaw device and the clamping and pulling of the pipe.

[0008] Furthermore, sprockets for controlling the transmission of the outer crawler are provided on both sides of the support frame, and a plurality of joint drawing dies with die grooves are provided on the outer crawler. When the outer crawler draws the pipe, the pipe is clamped in the die groove. The inner crawler is composed of rollers and outer chain plates. The rollers are in contact with the outer crawler and the support frame, and the friction between the outer crawler and the inner crawler is rolling friction. The track plate with the joint drawing die can clamp the pipe. When the outer crawler is driven, friction will be generated between the outer crawler and the inner crawler, and the rollers can be driven to rotate under the action of the friction. Since there is a large friction between the rollers and the support frame, the inner crawler composed of rollers can be driven along the outer periphery of the support frame while the outer crawler is driven. There will also be a certain relative sliding between the outer crawler and the inner crawler. However, it is obvious that the friction generated will be lower, and the wear between the outer crawler and the rollers is extremely small, so it can be used for a long time without wear and is not prone to overheating.

[0009] Furthermore, the outer track is composed of a plurality of track shoes, the joint-pull mold is slidably matched with the track shoes, and a plurality of pairs of pressure plates are provided on both sides of the outer track to limit the displacement of the joint-pull mold on the track shoes, and one side of the pressure plates on both sides is removable. After the joint-pull mold is slidably matched with the track shoes, its displacement in the vertical direction is limited. At the same time, in the horizontal direction, except for the sliding direction of the joint-pull mold on the track shoes, the movement in other directions is limited. The pressure plate is used to limit the displacement of the joint-pull mold in the sliding direction on the track shoes. When replacing the joint-pull mold, the joint-pull mold can be removed by removing the pressure plate on one side.

[0010] Furthermore, the jaw device includes a jaw seat, the front end of the jaw seat is provided with an open jaw opening, the jaw opening is provided with a jaw seat for clamping the pipe, and the rear end of the jaw seat is provided with a pipe passage connected to the jaw opening. The pipe extends from the jaw opening into the jaw seat, and the pipe can be firmly clamped by the jaw seat. As the jaw device moves, the pipe is pulled, and then the outer crawler starts to pull the pipe, and the pulled pipe is transmitted out of the frame through the jaw opening and the pipe passage.

[0011] Furthermore, a tail cylinder is provided at the rear end of the frame, and the tail cylinder controls the displacement of the jaw device from the frame to the support frame. A baffle is provided on the side of the jaw seat, and blocking protrusions are provided on both sides of the outer track, and the blocking protrusions can resist the baffle to control the displacement of the jaw device between the two support frames. Since the stroke of the cylinder is limited, it cannot meet the conditions for controlling the entire operation process. Although the outer track can control the displacement of the jaw device, the necessary condition for the outer track to control the movement of the jaw device is that the jaw device needs to be close to the outer track. Therefore, the displacement of the jaw device is divided into two parts, the displacement of the first part is controlled by the tail cylinder assembly, and the displacement of the second part is controlled by the outer track.

[0012] Furthermore, a hydraulic cylinder is provided on the right side of the frame, the hydraulic cylinder is connected to the telescopic seat, the upper and lower surfaces of the telescopic seat are provided with racks, the multiple synchronous rotating arms on the same level are connected by a pull rod, and the synchronous rotating arms at the middle ends of the multiple synchronous rotating arms on the same level are provided with a quarter gear meshed with the rack. The hydraulic cylinder can stably generate a great thrust, can smoothly push the synchronous rotating arm to rotate, and can control the telescopic speed of the telescopic seat through a program to achieve the speed of controlling the lifting and lowering of the outer crawler. The connection between the synchronous rotating arm and the telescopic seat is meshing, and the movement and power of the telescopic seat are transmitted to the synchronous rotating arm. The rack and pinion transmission has a large power transmission and is suitable for controlling the movement of the heavy support frame and the outer crawler. The coordination of the rack and pinion transmission and the hydraulic cylinder can ensure a constant transmission ratio. The pull rod between the synchronous rotating arms can ensure that the movement between the synchronous rotating arms rotating in the same direction remains synchronized to meet the actual use requirements.

[0013] Furthermore, the synchronous rotating arm is provided with an eccentric shaft, and the synchronous rotating arm is connected to the support frame through the eccentric shaft, and the support frame is provided with a horizontal elliptical hole, and the eccentric shaft extends into the horizontal elliptical hole. When the synchronous rotating arm rotates, the eccentric shaft will also rotate synchronously, and when loosening the pipe, the eccentric shaft end of the upper outer track moves from the end of the horizontal elliptical hole to the highest point of the horizontal elliptical hole, and the eccentric shaft end of the lower outer track moves from the end of the horizontal elliptical hole to the lowest point of the horizontal elliptical hole; when clamping the pipe, the eccentric shaft end of the upper outer track moves from the highest point of the horizontal elliptical hole to the end of the horizontal elliptical hole, and the eccentric shaft end of the lower outer track moves from the lowest point of the horizontal elliptical hole to the end of the horizontal elliptical hole.

[0014] Furthermore, a dual-output synchronous reducer is provided on the right side of the frame, and the dual-output synchronous reducer is connected to the sprocket through a universal coupling. The transmission of the outer track is controlled by the sprocket, and the sprocket can only rotate when the transmission shaft transmits the rotation. When the support frame moves, the sprocket will also move synchronously with it. Therefore, the transmission shaft is selected as a universal coupling, which can meet the use requirements, and the dual-output synchronous reducer and the sprocket are still connected when the support frame and the sprocket move.

[0015] Furthermore, the two support frames are provided with a plurality of tensioning blocks for tensioning the outer track and the inner track, and the plurality of tensioning blocks are divided into a first tensioning block, a second tensioning block and a third tensioning block. The first tensioning block and the second tensioning block tension the outer track and the inner track in the vertical direction, and the third tensioning block tensions the outer track and the inner track at both ends.

[0016] Furthermore, the support frame is provided with an oil cylinder connected to the first tensioning block, and the support frame is also provided with a push rod connected to the third tensioning block and a nut seat for controlling the extension and retraction of the push rod. The oil cylinder can control the rapid lifting and lowering of the first tensioning block and the second tensioning block to quickly tension the outer crawler and the inner crawler, and the third tensioning blocks at both ends are controlled to expand by manually adjusting the nut seat to eliminate the gap between the inner crawler and the support frame at both ends.

[0017] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings.

Brief Description of the Drawings

[0018] The present invention will be further described below in conjunction with the accompanying drawings:

[0019] Figure 1 It is a front view of the crawler-type pulling machine in the first embodiment of the present invention;

[0020] Figure 2 It is a rear view of the crawler belt pulling machine in the first embodiment of the present invention;

[0021] Figure 3 It is an axonometric view of the outer crawler and the inner crawler in the first embodiment of the present invention;

[0022] Figure 4 It is a schematic diagram of the structure of the outer crawler and the inner crawler in the first embodiment of the present invention;

[0023] Figure 5 This is an axonometric view of the support frame in the first embodiment of the present invention;

[0024] Figure 6 It is a front view of the jaw device in the second embodiment of the present invention;

[0025] Figure 7 is a cross-sectional view of a jaw device in a second embodiment of the present invention;

[0026] Figure 8 This is a schematic diagram of the structure of the combination of the tail cylinder and the jaw device in the second embodiment of the present invention;

[0027] Fig. 9 It is a left side view of the jaw device in the second embodiment of the present invention;

[0028] Fig.10 It is an axonometric view of the outer crawler in the second embodiment of the present invention;

[0029] Fig.11 It is a rear view of the crawler belt pulling machine in the third embodiment of the present invention;

[0030] Fig.12 It is a cross-sectional view of the crawler belt pulling machine in the third embodiment of the present invention;

[0031] Fig.13 It is a right sectional view of the crawler belt pulling machine in the third embodiment of the present invention;

[0032] Fig.14 The structure of the support frame in the fourth embodiment of the present invention is shown in FIG. Figure 1 ;

[0033] Fig.15 The structure of the support frame in the fourth embodiment of the present invention is shown in FIG. Figure 2 .

[0034] Reference numerals:

[0035] Rack 100;

[0036] Support frame 200, outer crawler 210, mold groove 211, joint pulling mold 212, crawler shoe 213, pressing plate 214;

[0037] Inner crawler 220, roller 221, outer link plate 222;

[0038] Support protrusion 230, sprocket 240, tooth groove 241, blocking protrusion 250;

[0039] The jaw device 300, the jaw seat 310, the jaw opening 311, the jaw seat 312, the pipe passage 313, and the baffle 320;

[0040] Synchronous rotating arm 400, hydraulic cylinder 410, telescopic seat 420, rack 430, pull rod 440, quarter gear 450, eccentric shaft 460, horizontal elliptical hole 470;

[0041] Dual output synchronous reducer 480, universal coupling 490;

[0042] The tail cylinder 500, the plug block 510, the side cylinder 520, the latch 530, and the socket 540;

[0043] A first tensioning block 600 , a second tensioning block 610 , a third tensioning block 620 , an oil cylinder 630 , a push rod 640 , and a nut seat 650 . [Specific implementation method]

[0044] The technical solutions of the embodiments of the present invention are explained and described below in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0045] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0046] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more, unless otherwise clearly specified.

[0047] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0049] Embodiment 1:

[0050] Reference Figures 1 to 4 The crawler-type pulling machine comprises a frame 100, and two support frames 200 are arranged at intervals in an upper and lower direction on the left side of the frame 100. The outer periphery of the two support frames 200 is provided with an outer crawler 210 for clamping and drawing the pipe, and an inner crawler 220 for reducing the friction generated during transmission is provided between the outer crawler 210 and the support frame 200. A movable jaw device 300 is provided between the two support frames 200 on the frame 100. The jaw device 300 is used to clamp the end of the pipe just inserted into the frame 100 and pull the pipe to move to complete the initial drawing. A plurality of synchronous rotating arms 400 connected to the two support frames 200 are provided on the right side of the frame 100. When the plurality of synchronous rotating arms 400 rotate, the two support frames 200 can be driven to open and close relative to each other in the vertical direction. When the two support frames 200 are separated, the jaw device 300 can move, and when the two support frames 200 are combined, the pipe can be clamped and drawn.

[0051] It should be noted that: Figure 1 is the standard, where the right side in the figure is the front end, the left side in the figure is the rear end, the directions perpendicular to the drawing are the left and right sides, the direction entering the drawing is the right side, and the direction extending from the drawing to the outside is the left side.

[0052] The crawler-type pulling machine is used to draw the pipe, reduce the diameter and wall thickness of the pipe, and draw the short thick pipe into a long thin pipe. The pipe can be clamped by the outer crawler 210, and the clamped pipe is pulled as the outer crawler 210 is driven. There is uninterrupted friction between the outer crawler 210 and the support frame 200 during transmission. After long-term use, the support frame 200 and the outer crawler 210 will have great wear and tear, and will also generate great heat. In addition, it takes a lot of energy to overcome the friction. The inner crawler 220 is located between the outer crawler 210 and the support frame 200, and the outer crawler 210 is driven on the outside of the inner crawler 220. The contact area between the inner track 220 is small, so the wear will be less. The jaw device 300 is used to clamp the pipe in the initial stage of pipe drawing, and then start to move with the pipe, which can ensure that the outer track 210 can be pulled stably. The movement of the jaw device 300 will collide with the support frame 200. For this reason, the upper and lower support frames 200 can open and close relative to each other in the vertical direction, and the movement is convenient for the jaw device 300 to move and clamp and pull the pipe. Figure 4 and 5 Sprockets 240 for controlling the transmission of the outer track 210 are provided on both sides of the support frame. A plurality of connecting dies 212 with die grooves 211 are provided on the outer track 210. When the outer track 210 draws the pipe, the pipe is clamped in the die groove 211. The inner track 220 is composed of rollers 221 and outer link plates 222. The rollers are in contact with the outer track 210 and the support frame 200. The friction between the outer track 210 and the inner track 220 is rolling friction. The track plate with the connecting die 212 can clamp the pipe. When the outer track 210 is driven, friction will be generated between it and the inner track 220. The roller 221 can be driven to rotate under the action of the friction. Since there is a large friction between the roller 221 and the support frame 200, the inner track 220 composed of the roller 221 can be driven along the outer periphery of the support frame 200 while the outer track 210 is driven. There will also be a certain relative sliding between the outer track 210 and the inner track 220. However, it is obvious that the friction generated will be lower, and the wear between the outer track 210 and the roller 221 is extremely small. It can be used for a long time without wear and is not prone to overheating.

[0053] The sprocket 240 controls the transmission of the outer track 210 in the following manner: a plurality of support protrusions 230 are provided on both sides of the outer track 210, and the support protrusions 230 are inserted into the tooth grooves 241 of the sprocket 240. When the sprocket 240 rotates, the outer track 210 is driven to transmit by meshing with the support protrusions 230. With such a transmission method, the sprocket 240 will not contact the inner track 220 when rotating.

[0054] The outer track 210 is composed of a plurality of track plates 213. The connecting mold 212 is slidably matched with the track plates 213. A plurality of pairs of pressure plates 214 are provided on both sides of the outer track 210 to limit the displacement of the connecting mold 212 on the track plates 213. One side of the pressure plates 214 on both sides is removable. The track plates 213 are provided with dovetail grooves. After the connecting mold 212 is slidably matched with the track plates 213, the connecting mold 212 is restricted by the dovetail grooves and cannot move in the vertical direction. In the horizontal direction, except for the sliding direction of the connecting mold 212 on the track plates 213, the movement in other directions is restricted. The pressure plates 214 are used to limit the displacement of the connecting mold 212 in the sliding direction on the track plates 213. When replacing the connecting mold 212, the connecting mold 212 can be removed by removing the pressure plates 214 on one side.

[0055] Considering that one side of the outer track 210 is relatively close to the frame 100, it is impossible to install it on the track shoe 213 from the dovetail groove notch close to the frame 100 side. Therefore, the joint drawing mold 212 gradually approaches the frame 100 during the sliding cooperation with the track shoe 213. The pressing plate 214 can be installed on the joint drawing mold 212 or the track shoe 213. If it is installed on the joint drawing mold 212, the non-detachable pressing plate 214 is located on the side away from the frame 100. Then, the pressing plate 214 is installed on the joint drawing mold 212 close to the frame 100 side. The pressing plate 214 can be installed on this layer, but because the distance from the frame 100 is too close, the operation is not directional. If the pressing plate 214 is installed on the track shoe 213, the fixed pressing plate 214 can be set close to the frame 100. On the track shoe 213 on one side, after installing the linked drawing mold 212, it is more convenient to install the pressing plate 214 on the track shoe 213 on the side away from the frame 100.

[0056] Embodiment 2:

[0057] This embodiment specifically describes the structure of the jaw device 300: Figure 6 and 7 The jaw device 300 includes a jaw seat 310, a jaw opening 311 is provided at the front end of the jaw seat 310, a jaw seat 312 for clamping the pipe is provided in the jaw opening 311, the jaw seat 312 can slide in the jaw opening 311, and an open pipe passage 313 connected to the jaw opening 311 is provided at the rear end of the jaw seat 310. The pipe extends into the jaw seat 310 from the jaw opening 311, and the pipe can be firmly clamped by the jaw seat 312. As the jaw device 300 moves, the pipe is pulled, and then the outer crawler 210 starts to pull the pipe, and the pulled pipe is transmitted out of the frame 100 through the jaw opening 311 and the pipe passage 313.

[0058] In addition, this embodiment also proposes a structure for controlling the movement of the jaw device 300: Figure 8 and9 , a tail cylinder assembly is provided at the rear end of the frame 100, and the tail cylinder assembly controls the displacement of the jaw device 300 from the frame 100 to the support frame 200, a baffle 320 is provided on the side of the jaw seat 310, and blocking protrusions 250 are provided on both sides of the outer track 210, and the blocking protrusions 250 can resist the baffle 320 to control the displacement of the jaw device 300 between the two support frames 200. Due to the limited stroke of the cylinder, it cannot meet the conditions for controlling the entire operation process, and although the outer track 210 can control the displacement of the jaw device 300, the necessary condition for the outer track 210 to control the movement of the jaw device 300 is that the jaw device 300 needs to be close to the outer track 210, so the displacement of the jaw device 300 is divided into two parts, the displacement of the first part is controlled by the tail cylinder assembly, and the displacement of the second part is controlled by the outer track 210.

[0059] Further explanation: See Fig.10 The tail cylinder assembly includes a tail cylinder 500 and an insert block 510. The jaw device 300 is provided with a side cylinder 520 assembly, which includes a side cylinder 520 and a latch 530. The jaw device 300 is provided with a socket 540. The tail cylinder 500 controls the insert block 510 to be inserted into the socket 540. The side cylinder 520 controls the latch 530 to be inserted into the socket 540 from the side and clamps the insert block 510. The insert block 510 is controlled by the tail cylinder 500 to complete the plug-in connection with the socket 540. The side cylinder 520 controls the latch 530 to clamp the insert block 510 to prevent the insert block 510 from moving out of the socket 540. Such a setting enables the jaw device 300 to always maintain connection with the insert block 510 during the movement process, and the displacement of the first section of the jaw device 300 can be completed.

[0060] For other contents not described in this embodiment, please refer to Embodiment 1.

[0061] Embodiment three:

[0062] This embodiment proposes a method for controlling the up and down movement of the support frame 200. Specifically, refer to Fig.11and 12, a hydraulic cylinder 410 is provided on the right side of the frame 100, the hydraulic cylinder 410 is connected to the telescopic seat 420, and racks 430 are provided on the upper and lower surfaces of the telescopic seat 420. A plurality of synchronous rotating arms 400 on the same level are connected by a pull rod 440, and a quarter gear 450 meshing with the rack 430 is provided on the synchronous rotating arm 400 at the middle end of the plurality of synchronous rotating arms 400 on the same level. The hydraulic cylinder 410 can stably generate a great thrust, can smoothly push the synchronous swing arm 400 to rotate, and can control the extension and retraction speed of the telescopic seat 420 through the program to achieve the speed of controlling the lifting and lowering of the outer track 210. The synchronous swing arm 400 and the telescopic seat 420 are connected in a meshing manner, and the movement and power of the telescopic seat 420 are transmitted to the synchronous swing arm 400. The rack and pinion transmission has large power transmission and is suitable for controlling the movement of the heavy support frame 200 and the outer track 210. The coordination of the rack and pinion transmission and the hydraulic cylinder 410 can ensure a constant transmission ratio. The pull rod 440 between the synchronous swing arms 400 can ensure that the movements of the synchronous swing arms 400 rotating in the same direction remain synchronized to meet actual usage requirements.

[0063] The method for controlling the support frame 200 to move only in the vertical direction is as follows: an eccentric shaft 460 is provided on the synchronous rotating arm 400, the synchronous rotating arm 400 is connected to the support frame 200 through the eccentric shaft 460, and a horizontal elliptical hole 470 is provided on the support frame 200, and the eccentric shaft 460 extends into the horizontal elliptical hole 470. When the synchronous rotating arm 400 rotates, the eccentric shaft 460 also rotates synchronously. When loosening the pipe, the end of the eccentric shaft 460 of the upper outer track 210 moves from the end of the horizontal elliptical hole 470 to the highest point of the horizontal elliptical hole 470, and the end of the eccentric shaft 460 of the lower outer track 210 moves from the end of the horizontal elliptical hole 470 to the lowest point of the horizontal elliptical hole 470; when clamping the pipe, the end of the eccentric shaft 460 of the upper outer track 210 moves from the highest point of the horizontal elliptical hole 470 to the end of the horizontal elliptical hole 470, and the end of the eccentric shaft 460 of the lower outer track 210 moves from the lowest point of the horizontal elliptical hole 470 to the end of the horizontal elliptical hole 470.

[0064] When the outer crawler 210 controls the jaw device 300 and pulls the pipe, its body will be driven on the support frame 200. Considering that the support frame 200 will move up and down, this embodiment proposes a method for providing power to the outer crawler 210: Fig.13, a dual-output synchronous reducer 480 is provided on the right side of the frame 100, and the dual-output synchronous reducer 480 is connected to the sprocket 240 through a universal coupling 490. The transmission of the outer track 210 is controlled by the sprocket 240, and the sprocket 240 can only rotate when the transmission shaft transmits the rotation. When the support frame 200 moves, the sprocket 240 will also move synchronously with it. Therefore, the universal coupling 490 is selected as the transmission shaft, which can meet the use requirements. When the support frame 200 and the sprocket 240 move, the dual-output synchronous reducer 480 and the sprocket 240 are still connected.

[0065] For other contents not described in this embodiment, reference may be made to the above embodiments.

[0066] Embodiment 4:

[0067] In this embodiment, refer to Fig.14 , the two support frames 200 are provided with multiple tensioning blocks for tensioning the outer crawler 210 and the inner crawler 220, and the multiple tensioning blocks are divided into a first tensioning block 600, a second tensioning block 610 and a third tensioning block 620. The first tensioning block 600 and the second tensioning block 610 tension the outer crawler 210 and the inner crawler 220 in the vertical direction, and the third tensioning block 620 tensions the outer crawler 210 and the inner crawler 220 at both ends.

[0068] Take the upper support frame 200 as an example for explanation:

[0069] When the first tensioning block 600 moves upward, it pushes the outer track 210 and the inner track 220 to move upward, and the second tensioning block 610 is located on both sides of the first tensioning block 600. One end of the second tensioning block 610 is rotatably connected to the support frame 200, and the other end of the second tensioning block 610 is rotatably connected to the first tensioning block 600. When the first tensioning block 600 expands outward, it drives the second tensioning block 610 to tension the outer track 210 and the inner track 220. The third tensioning block 620 is located at both ends of the support frame 200. The third tensioning block 620 expands outward to tension the outer track 210 and the inner track 220 located at both ends of the support frame 200. After the outer track 210 and the inner track 220 located at the top position of the support frame 200 are tensioned, a gap may appear between the inner track 220 at both ends and the support frame 200. Adjusting the third tensioning block 620 can reduce the gap and make the inner track 220 in close contact with the support frame 200.

[0070] The method of controlling multiple tension blocks is as follows: Fig.15The support frame 200 is provided with an oil cylinder 630 connected to the first tensioning block 600, and the support frame 200 is also provided with a push rod 640 connected to the third tensioning block 620 and a nut seat 650 for controlling the extension and retraction of the push rod 640. Considering the weight of the support frame 200 and the sprocket 240, the oil cylinder 630 is selected as the power component of the automatic adjustment component. The oil cylinder 630 can generate a large thrust, and can control the first tensioning block 600 and the second tensioning block 610 to rise and fall quickly, and quickly tension the outer crawler 210 and the inner crawler 220. By manually adjusting the nut seat 650, the nut seat 650 controls the push rod 640 to move slowly through the threaded fit, and the expansion of the third tensioning block 620 at both ends can be adjusted little by little, eliminating the gap between the inner crawler 220 and the support frame 200 at both ends.

[0071] For other contents not described in this embodiment, reference may be made to the above embodiments.

[0072] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. Tracked puller, Features: The machine comprises a frame, an upper and a lower support frame is arranged on the frame, an outer crawler for clamping and pulling the pipe is arranged on the outer periphery of the support frame, an inner crawler for reducing the friction generated during transmission is arranged between the outer crawler and the support frame, a movable jaw device is arranged on the frame between the two support frames, the jaw device is used to clamp the end of the pipe just inserted into the frame, and pull the pipe to move to complete the initial drawing, a plurality of synchronous rotating arms connected to the two support frames are arranged on the frame, and the plurality of synchronous rotating arms can drive the two support frames to open and close relative to each other in the vertical direction when rotating, the jaw device can move when the two support frames are separated, and can Clamping and pulling pipes; a hydraulic cylinder is provided on the right side of the frame, and the hydraulic cylinder is connected to the telescopic seat. Racks are provided on the upper and lower surfaces of the telescopic seat. Multiple synchronous rotating arms on the same level are connected by pull rods, and the synchronous rotating arms at the middle ends of the multiple synchronous rotating arms on the same level are provided with a quarter gear meshing with the rack. Multiple tensioning blocks for tensioning the outer crawler and the inner crawler are provided on the two support frames, and the multiple tensioning blocks are divided into a first tensioning block, a second tensioning block and a third tensioning block. The first tensioning block and the second tensioning block tension the outer crawler and the inner crawler in the vertical direction, and the third tensioning block tensions the outer crawler and the inner crawler at both ends.

2. The crawler belt pulling machine according to claim 1, Features: Sprockets for controlling the transmission of the outer crawler are provided on both sides of the support frame. A plurality of connecting drawing dies with die grooves are provided on the outer crawler. When the outer crawler draws the pipe, the pipe is clamped in the die groove. The inner crawler is composed of rollers and outer chain plates. The rollers are in contact with the outer crawler and the support frame. The friction force between the outer crawler and the inner crawler is rolling friction.

3. The crawler belt pulling machine according to claim 2, Features: The outer track is composed of a plurality of track plates, the connecting die is slidably matched with the track plates, and a plurality of pairs of pressure plates are provided on both sides of the outer track to limit the displacement of the connecting die on the track plates, wherein the pressure plate away from the side of the frame is detachable.

4. The crawler belt pulling machine according to claim 1, Features: The jaw device comprises a jaw seat, the front end of which is provided with an open jaw opening, the jaw seat for clamping the pipe is provided inside the jaw opening, and the rear end of the jaw seat is provided with a pipe passage communicating with the jaw opening.

5. The crawler belt pulling machine according to claim 4, Features: A tail cylinder is provided at the rear end of the frame, and the tail cylinder controls the displacement of the jaw device from the frame to the support frame. A baffle is provided on the side of the jaw seat, and blocking protrusions are provided on both sides of the outer track. The blocking protrusions can be offset from the baffle to control the displacement of the jaw device between the two support frames.

6. The crawler belt pulling machine according to claim 2, Features: An eccentric shaft is arranged on the synchronous rotating arm, and the synchronous rotating arm is connected to the supporting frame through the eccentric shaft. A horizontal elliptical hole is arranged on the supporting frame, and the eccentric shaft extends into the horizontal elliptical hole.

7. The crawler belt pulling machine according to claim 6, Features: A dual-output synchronous reducer is arranged on the right side of the frame, and the dual-output synchronous reducer is connected to the sprocket through a universal coupling.

8. The crawler belt pulling machine according to claim 1, Features: The support frame is provided with an oil cylinder connected to the first tensioning block, and the support frame is also provided with a push rod connected to the third tensioning block and a nut seat for controlling the extension and retraction of the push rod.

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