CN110697496A

CN110697496A - Flat belt tractor

Info

Publication number: CN110697496A
Application number: CN201911102056.7A
Authority: CN
Inventors: 范杨; 戚明智; 卢飞; 王淼淼
Original assignee: Hefei Smarter Technology Group Corp
Current assignee: Hefei Smarter Technology Group Corp
Priority date: 2019-11-12
Filing date: 2019-11-12
Publication date: 2020-01-17

Abstract

The invention discloses a flat belt tractor which comprises a support, an upper crawler belt and a lower crawler belt, wherein the upper crawler belt and the lower crawler belt are symmetrically arranged, a left wheel is arranged at one end of each of the upper crawler belt and the lower crawler belt, a right wheel is arranged at the other end of each of the upper crawler belt and the lower crawler belt, the middle parts of the left wheel and the right wheel which are connected with the lower crawler belt are connected with a rotating shaft, and the same end of each rotating shaft is connected with a speed reducer. Can solve current flat belt tractor because lack and press from both sides tight mechanism to between two tracks for two tracks appear easily because of the contact surface is not enough or the not enough phenomenon that skids appears of frictional force between track and the submarine cable at the in-process of pulling the submarine cable, and because lack the mechanism of adjusting crawler tension, the condition that leads to the track to appear taking off the wheel or even damage easily because of tension is not enough when the function takes place, simultaneously because current flat belt tractor often need be equipped with a plurality of driving motor when can realizing the forward and reverse traction in needs.

Description

Flat belt tractor

Technical Field

The invention relates to the field of tractors, in particular to a flat belt tractor.

Background

The cable is received in carrying out the submarine cable, it pulls to need to use flat belt tractor among the cable laying work process, but current flat belt tractor still has certain defect when using, at first, because lack the mechanism of pressing from both sides tightly between two tracks, make two tracks appear easily because of the contact surface is not enough or the not enough phenomenon that skids of frictional force appears between track and the submarine cable at the in-process of pulling the submarine cable, and because lack the mechanism of adjusting crawler tension, the condition that leads to the track to appear easily taking off the wheel or even damage when the function takes place because tension is not enough, simultaneously because current flat belt tractor often can realize being equipped with a plurality of driving motor when just reversing the traction in needs, thereby lead to the manufacturing cost of tractor higher.

The publication number is: the patent of CN204057451U discloses a crawler tractor, which, compared with the present application, cannot solve the problems proposed by the present application: the existing flat belt tractor is lack of a mechanism for clamping two crawler belts when in use, so that the phenomenon of slipping between the crawler belts and a submarine cable due to insufficient contact surface or insufficient friction force easily occurs in the process of dragging the submarine cable by the two crawler belts, and the lack of a mechanism for adjusting the tension of the crawler belts causes the situation that the crawler belts are easy to slip or even damaged due to insufficient tension when in operation, and meanwhile, the existing flat belt tractor is often required to be provided with a plurality of driving motors when in forward and reverse traction, so that the production cost of the tractor is high.

Disclosure of Invention

The invention aims to provide a flat belt tractor which can solve the problems that the existing flat belt tractor is lack of a mechanism for clamping two crawler belts when in use, so that the phenomenon of slipping between the crawler belts and a submarine cable due to insufficient contact surface or insufficient friction force is easy to occur in the process of dragging the submarine cable by the two crawler belts, the crawler belts are easy to wheel off or even damaged due to insufficient tension force due to the lack of a mechanism for adjusting the tension force of the crawler belts when in operation, and meanwhile, the existing flat belt tractor is often required to be provided with a plurality of driving motors when forward and reverse traction is required, so that the production cost of the tractor is higher.

The invention protects the traction structural form, namely, a main motor drives a synchronous belt pulley and a transmission shaft to drive two speed reducers, thus realizing the forward and reverse traction of traction;

the protective cylinder pressing and releasing device drives the connecting rod mechanism through the expansion and contraction of the cylinder, drives the flat belt through the connecting rod mechanism to achieve the clamping and releasing of the traction flat belt and automatically centers the belt all the time;

the chain tensioning mode is protected, namely the chain is arched by pushing the chain wheel through the cylinder to achieve the tensioning purpose.

The purpose of the invention can be realized by the following technical scheme:

a flat belt tractor comprises a bracket, an upper crawler belt and a lower crawler belt, wherein the upper crawler belt and the lower crawler belt are symmetrically arranged, one end of each of the upper crawler belt and the lower crawler belt is provided with a left wheel, the other end of each of the upper crawler belt and the lower crawler belt is provided with a right wheel, the middle parts of the left wheel and the right wheel which are connected with the lower crawler are both connected with a rotating shaft, the same end of the rotating shaft is respectively connected with a speed reducer, a transmission shaft is arranged between the two speed reducers for connection, one side of the transmission shaft is provided with a motor fixed on the bracket, a driving shaft of the motor is connected with a synchronous belt wheel positioned on the transmission shaft through a synchronous belt, the middle parts of the upper part of the upper crawler and the lower part of the lower crawler are respectively provided with a tensioning mechanism fixed on the bracket, and a plurality of clamping mechanisms fixed on the bracket are arranged between the upper crawler and the lower crawler;

the two tensioning mechanisms respectively comprise a top cylinder, a pneumatic rod and a traction rod, the top cylinders are fixed on the bracket, and the side wall of the top cylinder is connected with a pneumatic rod connected with a traction wheel, one end of the pneumatic rod is connected with a traction rod which is obliquely arranged, one end of the traction rod is connected with a connecting rod, one end of the connecting rod is connected with a traction wheel, one of the traction wheels is contacted with the inner wall of the upper crawler belt, the other traction wheel is contacted with the inner wall of the lower crawler belt, two sides of the two traction wheels are respectively provided with a limiting wheel, the two limiting wheels close to the upper crawler belt are contacted with the outer wall of the upper crawler belt, two limiting wheels close to the upper crawler belt are positioned on the same horizontal straight line, two limiting wheels close to the lower crawler belt are in contact with the outer wall of the lower crawler belt, and two limiting wheels close to the lower crawler belt are positioned on the same horizontal straight line;

each clamping mechanism comprises a bottom cylinder, a lower pressing plate and an upper pressing plate, the bottom cylinder is connected with the lower pressing plate through a screw rod, the top of the lower pressing plate is in contact with the inner wall of the lower crawler belt, the bottom cylinder is connected with the upper pressing plate through another screw rod, and the bottom of the upper pressing plate is in contact with the inner wall of the upper crawler belt.

Preferably, the upper crawler and the lower crawler are both composed of a chain and a plurality of rubber blocks which are uniformly distributed on the chain.

Preferably, the traction wheel is movably connected with the upper crawler and the lower crawler through a pneumatic rod, a traction rod and a connecting rod, a shaft connected between the connecting rod and the traction rod is connected with the support, and the traction wheel moves towards the top cylinder from the initial position of the traction wheel when moving.

Preferably, the upper pressure plate and the lower pressure plate are movably connected through screw rods which are respectively connected.

Preferably, all of the upper platen bottoms are held parallel and all of the lower platen tops are held parallel.

Preferably, the two speed reducers are in transmission connection with the motor through a transmission shaft, one of the speed reducers is disconnected with the transmission shaft when the motor is started, and the other speed reducer is in butt joint with the transmission shaft.

Preferably, the working method of the flat belt tractor comprises the following specific steps:

the method comprises the following steps: the submarine cable to be pulled is placed between an upper crawler belt and a lower crawler belt, then a clamping mechanism and a tensioning mechanism are started to adjust a tractor, a bottom cylinder is started to adjust the distance between an upper pressing plate and the lower pressing plate, the bottom cylinder drives the lower pressing plate to vertically move through the expansion of one screw rod, the bottom cylinder drives the upper pressing plate to vertically move through the expansion of the other screw rod, all the upper pressing plates synchronously move, all the lower pressing plates synchronously move to clamp the submarine cable, a top cylinder drives a pneumatic rod to extend, so that a traction rod is driven to rotate around a shaft between the traction rod and a connecting rod, the traction rod drives a traction wheel to rotate around the shaft between the traction rod and the connecting rod in the process of rotating around the shaft, and the movement direction of the traction wheel is inclined from a left wheel to a top cylinder, so that the upper crawler belt is adjusted, The lower crawler belt is arched, so that the purpose of tensioning the crawler belt is achieved;

step two: the speed reducer and the transmission shaft are adjusted, when the tractor needs forward traction, the transmission shaft is connected with one speed reducer, the other speed reducer is empty, when the tractor needs reverse traction, the transmission shaft is connected with the other speed reducer, the speed reducer during the original forward traction is empty, the upper crawler which is not connected with the drive is dragged by the lower crawler and the submarine cable to rotate, and therefore the submarine cable is dragged under the driving of the clamping rotation of the two crawlers.

The invention has the beneficial effects that: because of the existence of the clamping mechanism, the space between the upper pressure plate and the lower pressure plate can be adjusted by starting the bottom cylinder, when the bottom cylinder is started, the bottom cylinder drives the lower pressure plate to move up and down along the vertical direction through the extension of one screw rod, the bottom cylinder drives the upper pressure plate to move up and down along the vertical direction through the extension of the other screw rod, all the upper pressure plates synchronously move, all the lower pressure plates synchronously move, the upper crawler and the lower crawler are always centered, the sea cable is clamped, the contact area between the crawler and the sea cable is increased due to the existence of the clamping mechanism, the friction force is effectively improved, the slipping between the sea cable and the crawler in the process of dragging the sea cable can be effectively prevented, and meanwhile, the upper crawler which is not connected with the driving can be dragged by the lower crawler and the sea cable to rotate, therefore, one motor can drive the whole tractor to operate, when the tractor needs forward traction, the transmission shaft is connected with one speed reducer, the other speed reducer is empty, when the tractor needs reverse traction, the transmission shaft is connected with the other speed reducer, and the speed reducer in the original forward traction is empty, so that the function that one motor can drive the whole tractor to rotate forwards and backwards is realized;

due to the existence of the tensioning mechanism, the tension of the upper crawler belt and the lower crawler belt can be adjusted by starting the top cylinder, the top cylinder is used for driving the pneumatic rod to extend, so that the traction rod is driven to rotate around a shaft between the traction rod and the connecting rod, the traction rod drives the traction wheel to rotate around the shaft between the traction rod and the connecting rod in the process of rotating around the shaft, and the movement direction of the traction wheel is inclined from the left wheel to the top cylinder, so that the upper crawler belt and the lower crawler belt are arched, and the purpose of tensioning the crawler belt is achieved.

Drawings

In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic bottom view of the present invention;

in the figure: 1. a support; 2. an upper crawler belt; 3. a lower crawler belt; 4. a clamping mechanism; 5. a tensioning mechanism; 6. a left wheel; 7. a right wheel; 8. a top cylinder; 9. a pneumatic rod; 10. a draw bar; 11. a traction wheel; 12. a limiting wheel; 13. a bottom cylinder; 14. a screw rod; 15. a lower pressing plate; 16. an upper pressure plate; 17. a motor; 18. a synchronous belt; 19. a synchronous pulley; 20. a drive shaft; 21. a speed reducer; 22. a rotating shaft.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, a flat belt tractor comprises a support 1, an upper crawler 2 and a lower crawler 3, wherein the upper crawler 2 and the lower crawler 3 are symmetrically arranged, one end of each of the upper crawler 2 and the lower crawler 3 is provided with a left wheel 6, the other end of each of the upper crawler 2 and the lower crawler 3 is provided with a right wheel 7, the middle parts of the left wheel 6 and the right wheel 7 connected with the lower crawler 3 are respectively connected with a rotating shaft 22, the same end of the rotating shaft 22 is respectively connected with a speed reducer 21, a transmission shaft 20 is arranged between the two speed reducers 21 and connected with each other, one side of the transmission shaft 20 is provided with a motor 17 fixed on the support 1, the driving shaft of the motor 17 is connected with a synchronous belt wheel 19 positioned on the transmission shaft 20 through a synchronous belt 18, the middle parts below the upper crawler 2 and the lower crawler 3 are respectively provided with a tensioning, a plurality of clamping mechanisms 4 fixed on the bracket 1 are arranged between the upper crawler 2 and the lower crawler 3;

the two tensioning mechanisms 5 respectively comprise a top cylinder 8, a pneumatic rod 9 and a traction rod 10, the top cylinders 8 are fixed on the bracket 1, and the side wall of the top cylinder 8 is connected with a pneumatic rod 9 connected with a traction wheel 11, one end of the pneumatic rod 9 is connected with a traction rod 10 which is arranged obliquely through a shaft, one end of the traction rod 10 is connected with a connecting rod through a shaft, one end of the connecting rod is connected with the traction wheel 11 through a shaft, one traction wheel 11 is contacted with the inner wall of the upper crawler 2, the other traction wheel 11 is contacted with the inner wall of the lower crawler 3, two limiting wheels 12 are respectively arranged at two sides of the two traction wheels 11, the two limiting wheels 12 close to the upper crawler 2 are contacted with the outer wall of the upper crawler 2, the two limiting wheels 12 close to the upper crawler 2 are positioned on the same horizontal straight line, the two limiting wheels 12 close to the lower crawler 3 are in contact with the outer wall of the lower crawler 3, and the two limiting wheels 12 close to the lower crawler 3 are positioned on the same horizontal straight line;

each clamping mechanism 4 comprises a bottom cylinder 13, a lower pressing plate 15 and an upper pressing plate 16, the bottom cylinder 13 is connected with the lower pressing plate 15 through a screw rod 14, the top of the lower pressing plate 15 is in contact with the inner wall of the lower crawler 3, the bottom cylinder 13 is connected with the upper pressing plate 16 through another screw rod 14, and the bottom of the upper pressing plate 16 is in contact with the inner wall of the upper crawler 2.

The upper crawler 2 and the lower crawler 3 are both composed of a chain and a plurality of rubber blocks which are uniformly distributed on the chain.

The traction wheel 11 is movably connected with the upper crawler 2 and the lower crawler 3 through a pneumatic rod 9, a traction rod 10 and a connecting rod, a shaft connected between the connecting rod and the traction rod 10 is connected with the bracket 1, and the traction wheel 11 moves towards the top cylinder 8 from the initial position of the traction wheel 11 when moving.

The upper pressure plate 16 and the lower pressure plate 15 are movably connected through the screw rods 14 which are respectively connected.

All upper platens 16 remain parallel at the bottom and all lower platens 15 remain parallel at the top.

The two speed reducers 21 are in transmission connection with the motor 17 through a transmission shaft 20, when the motor 17 is started, one of the speed reducers 21 is disconnected with the transmission shaft 20, and the other speed reducer 21 is in butt joint with the transmission shaft 20.

The working method of the flat belt tractor comprises the following specific steps:

the method comprises the following steps: the submarine cable to be towed is placed between an upper crawler belt 2 and a lower crawler belt 3, then a clamping mechanism 4 and a tensioning mechanism 5 are started to adjust the towing machine, a bottom cylinder 13 is started to adjust the distance between an upper pressing plate 16 and a lower pressing plate 15, the bottom cylinder 13 drives the lower pressing plate 15 to move up and down along the vertical direction through the extension and retraction of one screw rod 14, the bottom cylinder 13 drives the upper pressing plate 16 to move up and down along the vertical direction through the extension and retraction of the other screw rod 14, all the upper pressing plates 16 synchronously move, all the lower pressing plates 15 synchronously move to clamp the submarine cable, a top cylinder 8 is used for driving a pneumatic rod 9 to extend, so as to drive a towing bar 10 to rotate around a shaft between the towing bar 10 and a connecting rod, the towing bar 10 drives a towing wheel 11 to also rotate around the shaft between the towing bar 10 and the connecting rod in the process of rotating around the shaft, and the moving direction of the towing wheel 11 is inclined from a left wheel 6, the upper crawler belt 2 and the lower crawler belt 3 are arched, so that the purpose of tensioning the crawler belts is achieved;

step two: the speed reducers 21 and the transmission shafts 20 are adjusted, when the tractor needs forward traction, the transmission shafts 20 are connected with one speed reducer 21, the other speed reducer 21 is empty, when the tractor needs reverse traction, the transmission shafts 20 are connected with the other speed reducer 21, the speed reducer 21 during the original forward traction is empty, the upper crawler 2 which is not connected with driving is dragged by the lower crawler 3 and the submarine cable to rotate, and therefore the submarine cable is dragged under the clamping rotation driving of the two crawlers.

The tractor drives two speed reducers by adopting a mode that one motor 17 drives a synchronous belt wheel 19 and a transmission shaft 20 to rotate, and then the clamping mechanism 4 is matched, so that an upper crawler 2 which is not connected with the drive can be dragged by a lower crawler 3 and a submarine cable to rotate, the whole tractor can be driven to operate by one motor 17, when the tractor needs forward traction, the transmission shaft 20 is connected with one speed reducer 21, the other speed reducer 21 is empty, when the tractor needs reverse traction, the transmission shaft 20 is connected with the other speed reducer 21, and the speed reducer 21 during the forward traction is empty, so that the function that one motor 17 can drive the whole tractor to rotate forward and backward is realized.

Due to the existence of the clamping mechanism 4, the distance between the upper pressing plate 16 and the lower pressing plate 15 can be adjusted by starting the bottom cylinder 13, when the bottom cylinder 13 is started, the bottom cylinder 13 drives the lower pressing plate 15 to move up and down in the vertical direction through the extension and retraction of one screw rod 14, the bottom cylinder 13 drives the upper pressing plate 16 to move up and down in the vertical direction through the extension and retraction of the other screw rod 14, all the upper pressing plates 16 synchronously move, all the lower pressing plates 15 synchronously move, the upper crawler 2 and the lower crawler 3 are always centered, the clamping of the submarine cable is realized, otherwise, the release of the submarine cable can be realized, the contact area between the crawler belt and the submarine cable is increased due to the existence of the clamping mechanism 4, the friction force is effectively improved, and the slip condition between the submarine cable and the crawler belt in the process of dragging the submarine cable can be effectively prevented;

due to the existence of the tensioning mechanism 5, the tension of the upper crawler 2 and the lower crawler 3 can be adjusted by starting the top cylinder 8, the top cylinder 8 is used for driving the pneumatic rod 9 to extend, so that the traction rod 10 is driven to rotate around a shaft between the traction rod 10 and the connecting rod, the traction rod 10 drives the traction wheel 11 to rotate around the shaft between the traction rod 10 and the connecting rod in the process of rotating around the shaft, and the movement direction of the traction wheel 11 is inclined from the left wheel 6 to the top cylinder 8, so that the upper crawler 2 and the lower crawler 3 are arched, and the purpose of tensioning the crawlers is achieved.

When the invention is used, firstly, the whole flat belt tractor is assembled, an upper crawler 2 is arranged on the upper half section of a bracket 1, a left wheel 6 and a right wheel 7 are respectively arranged at two ends of the upper crawler 2, a lower crawler 3 is arranged on the lower half section of the bracket 1, a left wheel 6 and a right wheel 7 are respectively arranged at two ends of the lower crawler 3, a rotating shaft 22 is respectively connected with the middle parts of the left wheel 6 and the right wheel 7 on the lower crawler 3, the same end of the two rotating shafts 22 is respectively connected with a speed reducer 21, a transmission shaft 20 is arranged between the two speed reducers 21, the transmission shaft 20 is always connected with one speed reducer 21, a motor 17 is arranged on one side of the transmission shaft 20, the driving shaft of the motor 17 is connected with a synchronous belt wheel 19 positioned on the transmission shaft 20 through a synchronous belt 18, a tensioning mechanism 5 fixed on the bracket 1 is respectively arranged above the upper crawler 2 and in the middle part below the lower crawler 3, two limiting wheels 12 positioned on the same horizontal straight, go up and install a plurality of clamping mechanism 4 of fixing on support 1 between track 2 and the track 3 down, be close to two spacing wheels 12 of last track 2 and contact with the outer wall of last track 2, be close to two spacing wheels 12 of track 3 down and contact with the outer wall of track 3 down, install a plurality of clamping mechanism 4 between last track 2 and track 3 down afterwards, can put into use after the completion. The submarine cable to be towed is placed between an upper crawler belt 2 and a lower crawler belt 3, then a clamping mechanism 4 and a tensioning mechanism 5 are started to adjust the towing machine, due to the existence of the clamping mechanism 4, the distance between an upper pressing plate 16 and a lower pressing plate 15 can be adjusted by starting a bottom cylinder 13, when the bottom cylinder 13 is started, the bottom cylinder 13 drives the lower pressing plate 15 to move up and down along the vertical direction through the extension and retraction of one lead screw 14, the bottom cylinder 13 drives the upper pressing plate 16 to move up and down along the vertical direction through the extension and retraction of the other lead screw 14, all the upper pressing plates 16 move synchronously, all the lower pressing plates 15 move synchronously, the upper crawler belt 2 and the lower crawler belt 3 are kept centered all the time, the submarine cable is clamped, the contact area between the crawler belt and the submarine cable is increased due to the existence of the clamping mechanism 4, the friction force is effectively improved, and the situation that the submarine cable and the crawler belt slip in the process of towing the submarine cable can be, meanwhile, the clamping mechanism 4 is arranged, so that the upper crawler 2 which is not connected and driven can be pulled by the lower crawler 3 and the submarine cable to rotate, the whole tractor can be driven to operate by one motor 17, when the tractor needs forward traction, the transmission shaft 20 is connected with one speed reducer 21, the other speed reducer 21 is empty, when the tractor needs reverse traction, the transmission shaft 20 is connected with the other speed reducer 21, the speed reducer 21 in the original forward traction is empty, the function that the whole tractor can be driven to rotate forward and backward by one motor 17 is realized, due to the existence of the tensioning mechanism 5, the tension of the upper crawler 2 and the lower crawler 3 can be adjusted by starting the top cylinder 8, the top cylinder 8 is used for driving the pneumatic rod 9 to extend, so that the traction rod 10 is driven to rotate around a shaft between the traction rod 10 and the connecting rod, and the traction rod 10 drives the traction wheel 11 to rotate around the shaft between the traction rod 10 and the connecting rod in the process of rotating around the shaft And the moving direction of the traction wheel 11 is from the left wheel 6 to the top cylinder 8, so that the upper crawler 2 and the lower crawler 3 are arched, and the purpose of tensioning the crawlers is achieved. After the adjustment is completed, the motors 17 are started, and one motor 17 can drive the positive and negative rotation of the whole tractor through the synchronous belt wheel 19 and the transmission shaft 20, so that the submarine cable can be pulled under the driving of the clamping rotation of the two crawler belts.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A flat belt tractor comprises a support (1), an upper crawler (2) and a lower crawler (3), and is characterized in that the upper crawler (2) and the lower crawler (3) are symmetrically arranged, one end of the upper crawler (2) and one end of the lower crawler (3) are respectively provided with a left wheel (6), the other end of the upper crawler (2) and the other end of the lower crawler (3) are respectively provided with a right wheel (7), the middle parts of the left wheel (6) and the right wheel (7) which are connected with the lower crawler (3) are respectively connected with a rotating shaft (22), the same end of the rotating shaft (22) is respectively connected with a speed reducer (21), a transmission shaft (20) is arranged between the two speed reducers (21) to be connected, one side of the transmission shaft (20) is provided with a motor (17) fixed on the support (1), and a driving shaft of the motor (17) is connected with a synchronous belt pulley (19) arranged on the transmission shaft (20) through a synchronous belt, a tensioning mechanism (5) fixed on the support (1) is respectively arranged above the upper crawler (2) and in the middle of the lower part of the lower crawler (3), and a plurality of clamping mechanisms (4) fixed on the support (1) are arranged between the upper crawler (2) and the lower crawler (3);

the two tensioning mechanisms (5) respectively comprise a top cylinder (8), a pneumatic rod (9) and a traction rod (10), the top cylinder (8) is fixed on the support (1), the side wall of the top cylinder (8) is connected with the pneumatic rod (9) of the traction wheel (11), one end of the pneumatic rod (9) is connected with the traction rod (10) which is obliquely arranged, one end of the traction rod (10) is connected with a connecting rod, one end of the connecting rod is connected with the traction wheel (11), one traction wheel (11) is in contact with the inner wall of the upper crawler (2), the other traction wheel (11) is in contact with the inner wall of the lower crawler (3), two limiting wheels (12) are arranged on two sides of the traction wheel (11), and the two limiting wheels (12) close to the upper crawler (2) are in contact with the outer wall of the upper crawler (2), two limiting wheels (12) close to the upper crawler (2) are positioned on the same horizontal straight line, two limiting wheels (12) close to the lower crawler (3) are in contact with the outer wall of the lower crawler (3), and two limiting wheels (12) close to the lower crawler (3) are positioned on the same horizontal straight line;

every clamping mechanism (4) all includes bottom cylinder (13), holding down plate (15) and top board (16), bottom cylinder (13) are through a lead screw (14) connection holding down plate (15), the inner wall of holding down plate (15) top and lower track (3) contacts, bottom cylinder (13) are through another lead screw (14) connection holding down plate (16), top board (16) bottom contacts with the inner wall of last track (2).

2. A flat belt traction machine according to claim 1, characterized in that said upper track (2) and lower track (3) are each constituted by a chain and a plurality of evenly distributed rubber blocks on the chain.

3. The flat belt tractor according to claim 1, characterized in that the traction wheel (11) is movably connected with the upper track (2) and the lower track (3) through a pneumatic rod (9), a traction rod (10) and a connecting rod, a shaft connected between the connecting rod and the traction rod (10) is connected with the bracket (1), and the traction wheel (11) moves from the initial position of the traction wheel (11) to the direction of the top cylinder (8) during movement.

4. The flat belt traction machine according to claim 1, characterized in that the upper platen (16) and the lower platen (15) are movably connected by a screw (14) connected to each other.

5. A flat belt traction machine according to claim 1, characterized in that all the upper platens (16) are kept parallel at the bottom and all the lower platens (15) are kept parallel at the top.

6. The flat belt traction machine according to claim 1, wherein the two speed reducers (21) are in transmission connection with the motor (17) through a transmission shaft (20), one of the speed reducers (21) is disconnected with the transmission shaft (20) when the motor (17) is started, and the other speed reducer (21) is butted with the transmission shaft (20).

7. The flat belt traction machine according to claim 1, wherein the operation method of the flat belt traction machine comprises the following specific steps:

the method comprises the following steps: the submarine cable to be pulled is placed between an upper crawler belt (2) and a lower crawler belt (3), then a clamping mechanism (4) and a tensioning mechanism (5) are started to adjust the tractor, a bottom cylinder (13) is started to adjust the distance between an upper pressing plate (16) and a lower pressing plate (15), the bottom cylinder (13) drives the lower pressing plate (15) to move up and down along the vertical direction through the stretching of a lead screw (14), the bottom cylinder (13) drives the upper pressing plate (16) to move up and down along the vertical direction through the stretching of the lead screw (14), all the upper pressing plates (16) move synchronously, all the lower pressing plates (15) move synchronously to clamp the submarine cable, a top cylinder (8) is used for driving a pneumatic rod (9) to extend, so that a traction rod (10) is driven to rotate around a shaft between the traction rod (10) and a connecting rod, and the traction rod (10) drives a traction wheel (11) to also rotate around the shaft between the traction rod (10) and the connecting rod in the process of rotating around the The rotation is carried out, and the moving direction of the traction wheel (11) is inclined from the left wheel (6) to the top cylinder (8), so that the upper crawler belt (2) and the lower crawler belt (3) are arched, and the purpose of tensioning the crawler belts is achieved;

step two: the speed reducers (21) and the transmission shafts (20) are adjusted, when the tractor needs forward traction, the transmission shafts (20) are connected with one speed reducer (21), the other speed reducer (21) is empty, when the tractor needs reverse traction, the transmission shafts (20) are connected with the other speed reducer (21), the speed reducers (21) during original forward traction are empty, the upper crawler (2) which is not connected with drive is dragged by the lower crawler (3) and the submarine cable to rotate, and therefore the submarine cable is dragged under the clamping rotation drive of the two crawlers.