Variable tension hydraulic traction equipment

Abstract

The invention provides a variable pulling force hydraulic traction device, which belongs to the technical field of power equipment for railway derailment pulling and rescue; the purpose is to solve the problems that the traction cylinder and its supporting parts are too heavy, the fixing method with the rail is unstable, the disassembly and assembly are inconvenient, the railway fastener system is easy to be damaged, and the whole set of equipment has many parts; the technical scheme includes a traction rope, a wire rope segmented positioning lock, a hollow cylinder and a rail clamp, the front and rear ends of the hollow cylinder are both provided with a top block connected to the piston, the top block includes a first wedge block and a second wedge block, the two wedge blocks are arranged at a V-shaped angle, the two wedge blocks can be stretched open by the wire rope segmented positioning lock and can automatically return to their positions, one end of the wire rope segmented positioning lock is connected to the traction rope, and the other end passes through the hollow cylinder, the hollow cylinder is connected to the rail clamp by a rope, and the rail clamp adopts an eccentric, lever-type self-locking structure; the technical effect is that the cylinder unit of the invention has a small weight, is easy to install, has few parts, and locks the rails safely and reliably.

Description

Technical Field

[0001] The invention belongs to the technical field of power equipment for railway derailment recovery and rescue, and specifically relates to a variable pulling force hydraulic traction tool. Background Art

[0002] At present, the known hydraulic traction equipments are all fixed pulling forces, and there are traction equipments with pulling forces of 30t and 40t.

[0003] The 30t traction equipment is mainly composed of a gasoline engine pump station, a traction cylinder, a traction cable segment, a traction sling, a rail clamp, etc. Figure 1 As shown, the whole set of tools is tied to the rail and the sleeper by a fixed chain, and the other end is connected to the accident locomotive and vehicle through a hook, and the accident locomotive and vehicle are towed back to the rails through the matching use of a hollow cylinder and a traction cable. The tool has the following problems: multiple traction cable segments need to be installed and fastened on site, which is time-consuming and labor-intensive; the whole set of tools is tied to the intersection of the rail and the sleeper by a chain, which is highly destructive to the fasteners and cumbersome to install; the traction force provided does not meet the requirements for pulling and restoring derailed heavy-loaded locomotives and vehicles.

[0004] The 40t traction equipment is mainly composed of a gasoline engine pump station, a traction cylinder, a traction chute, a traction rope, a fixed chain, etc. The whole set of equipment is bound to the rail and the sleeper through a fixed chain, and the other end is connected to the accident locomotive and vehicle through a hook. The traction cylinder uses a step-by-step self-locking movement to pull the accident locomotive and vehicle along the traction chute to re-rail. The equipment has the following problems: the chute of this type of equipment is composed of multiple pieces of monomers installed on site, which is time-consuming and labor-intensive; the whole set of equipment is bound to the intersection of the rail and the sleeper with a chain, which is highly destructive to the fasteners and cumbersome to install; in order to meet the requirement of a rated traction force of 400kN, the mass of the traction cylinder and the traction chute is too large, affecting the use effect of the equipment. Summary of the invention

[0005] The present invention overcomes the shortcomings of the prior art and proposes a variable pulling force hydraulic traction device, aiming to solve the problem that the traction cylinder and its supporting components are too heavy when pulling and recovering heavy-load accident locomotives and vehicles; the fixing method of the whole set of equipment and the rails is unstable, the installation and disassembly are inconvenient, and the railway fastener system is easily damaged; the whole set of equipment has many parts and the on-site installation is time-consuming.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions.

[0007] A variable tension hydraulic traction device, comprising a traction rope for connecting to a rescue vehicle, a steel wire rope segmented positioning rope, a hollow oil cylinder and a rail clamp for installation above a steel rail, wherein the steel wire rope segmented positioning rope comprises a steel wire rope and a compression sleeve arranged on the steel wire rope at intervals, wherein the compression sleeve is a hollow cylindrical structure, wherein a conical structure is arranged at one end of the compression sleeve away from the rescue vehicle, wherein the maximum diameter of the conical structure is equal to the diameter of the compression sleeve; wherein the hollow oil cylinder comprises a piston, a top block connected to the piston, wherein the top block comprises an upper support plate, a lower support plate and a compression sleeve arranged on the upper support plate. A first wedge block and a second wedge block between the support plate and the lower support plate, the first wedge block and the second wedge block are arranged at a V-shaped angle, the opening of the V-shaped angle is opposite to the pulling direction, and the two wedge blocks are provided with through holes on the side surfaces of the ends close to each other, the aperture of the through holes is between the minimum diameter and the maximum diameter of the conical surface structure, the first wedge block is provided with a first pin at one end away from the second wedge block, and the second wedge block is provided with a second pin at one end away from the first wedge block, the axes of the first pin and the second pin are perpendicular to the through holes, and the first pin passes through the The upper support plate is vertically connected to the first connecting plate, the second pin shaft penetrates the upper support plate and is vertically connected to the second connecting plate, a slide groove is arranged on the first connecting plate, a slider is arranged on the second connecting plate, the slider is arranged in the slide groove, the first connecting plate is connected to the upper support plate through a spring, the top block includes a front top block arranged at the front end of the piston and a rear top block arranged at the rear end of the piston; one end of the steel wire rope is connected to the traction rope, and the other end penetrates the hollow cylinder; the hollow cylinder is connected to the The track clamp is connected; the track clamp comprises a clamping block body and a connecting body connected to the clamping block body, the clamping block body and the connecting body are arranged at an angle, a rope pin is arranged on the connecting body for connecting with the rope, a clamping groove is arranged below the clamping block body, circular grooves are arranged on both side walls of the clamping groove, the two circular grooves are staggered along the length direction of the rail, a semicircular slider is arranged in the circular groove, a positioning pin is arranged at the bottom of the clamping block body, a positioning pin guide groove is arranged at the bottom of the semicircular slider, and one end of the positioning pin is arranged in the positioning pin guide groove.

[0008] Furthermore, the track clamp includes a first track clamp and a second track clamp, the hollow oil cylinder is connected to the first track clamp via a rope, the end of the traction rope away from the wire rope segmented positioning rope is connected to the second track clamp via a connecting device, the connecting device includes a pulley, a connecting clamp and a traction hook, one end of the connecting clamp is connected to the pulley via a clamp pin, and the other end is connected to the hook via a hook pin, the traction rope is arranged on the pulley, and the traction hook is used to be connected to the vehicle to be rescued.

[0009] Furthermore, two second track baffles are provided, and the two second track baffles are symmetrically arranged with respect to the traction rope.

[0010] Furthermore, a cylindrical cap is provided at one end of the clamping plate pin shaft to facilitate the plugging of the clamping plate pin shaft.

[0011] Furthermore, the first track fixture is provided

[0012] There are two first rail clamps, and the two first rail clamps are symmetrically arranged about the axis of the hollow oil cylinder.

[0013] Furthermore, one end of the semicircular sliding block for contacting the rail is configured as a tooth groove structure.

[0014] Furthermore, the upper support plate and the lower support plate are connected via an intermediate support plate, the intermediate support plate is vertically arranged, and a hole for the pressing sleeve to pass through is arranged on the intermediate support plate in a horizontal direction.

[0015] Furthermore, the traction rope is connected to the vehicle to be rescued through a connecting device.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the traction equipment and the rail fixing device of the present invention are easy and reliable to install, the step-by-step traction mode has a steady and controllable speed, and when the traction force is constant, the mass of the cylinder unit is small, which can meet the needs of ordinary vehicle pulling and rescue and heavy-loaded locomotive vehicle pulling and rescue; the rail clamp adopts an eccentric, lever-type self-locking rail clamping method, which is easy to install and disassemble, and the rail locking is safe and reliable; the hollow cylinder is used in conjunction with the wire rope segmented positioning rope, which reduces the number of components and facilitates installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings;

[0018] Figure 1 It is a structural schematic diagram of a 30t traction tool in the prior art;

[0019] Figure 2 It is a front view of Example 1;

[0020] Figure 3 is a top view of Example 1;

[0021] Figure 4 for Figure 3 A partial enlarged view of the A direction;

[0022] Figure 5 It is a front view of Example 2;

[0023] Figure 6 is a top view of Example 2;

[0024] Figure 7It is a structural schematic diagram of a steel wire rope with a knotted positioning cable;

[0025] Figure 8 It is a structural schematic diagram of a semicircular slider;

[0026] Fig. 9 is a structural schematic diagram of a first rail clamp;

[0027] Fig.10 It is a schematic diagram of the structure of the first rail clamp installed on the rail;

[0028] Fig.11 It is the front cross-sectional view of the hollow cylinder;

[0029] Fig.12 It is a top sectional view of a hollow oil cylinder;

[0030] Fig.13 for Fig.12 A local enlarged view in the D direction;

[0031] Fig.14 A schematic diagram of the structure after the first wedge block and the second wedge block are installed;

[0032] Fig.15 is a schematic diagram of the structure of the connecting device;

[0033] Among them, 1 is a wire traction rope, 2 is a wire rope with a node positioning rope, 3 is a hollow cylinder, 4 is a first track clamp, 5 is a vehicle to be rescued, 6 is a tooth groove structure, 7 is a positioning pin guide groove, 8 is a second track clamp, 9 is an upper support plate, 10 is a lower support plate, 11 is a rear top block, 12 is a front top block, 13 is a first wedge block, 14 is a second wedge block, 15 is a first connecting plate, 16 is a second connecting plate, 17 is a through hole, 19 is a spring, 20 is a connecting splint, 21 is a splint pin shaft, 22 is a pulley, 23 is a hook, 24 is a hook pin shaft, 25 is a cylindrical cap, 31 is a steel pressure sleeve, 32 is a wire rope, 41 is a block body, 42 is a connector, 421 is a lifting ear structure, 43 is a slot, 44 is a circular slot, 45 is a positioning pin, and 46 is a rope pin. DETAILED DESCRIPTION

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail in conjunction with the embodiments and the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. The technical solutions of the present invention are described in detail below in conjunction with the embodiments and the accompanying drawings, but the scope of protection is not limited thereto.

[0035] Example 1

[0036] like Figure 2-4As shown in FIG. 1 , the variable tension hydraulic traction device of the present invention comprises a steel wire traction rope 1 for connecting with a rescue vehicle 5, a steel wire rope with a segmented positioning rope 2, a hollow oil cylinder 3 and a first rail clamp 4 for installation above the rail, as shown in FIG. Figure 7 As shown, the wire rope segmented positioning rope 2 includes a wire rope 32 and a steel pressure sleeve 31 which is spaced apart on the wire rope 32. The steel pressure sleeve 31 is a hollow cylindrical structure. A conical structure is provided at one end of the steel pressure sleeve 31 away from the vehicle to be rescued 5. The maximum diameter of the conical structure is equal to the diameter of the steel pressure sleeve 31, that is, the steel pressure sleeve 31 includes a vertical end and a conical end.

[0037] like Figure 11-13 As shown, the hollow oil cylinder 3 includes a piston and a top block connected to the piston, the top block includes a horizontally arranged upper support plate 9, a horizontally arranged lower support plate 10, and a first wedge block 13 and a second wedge block 14 arranged between the upper support plate 9 and the lower support plate 10. The upper support plate 9 and the lower support plate 10 are connected through an intermediate support plate, the intermediate support plate is vertically arranged, and a hole for the steel press sleeve 31 to pass through is arranged on the intermediate support plate in the horizontal direction, as shown in FIG. Fig.14 As shown, the first wedge block 13 and the second wedge block 14 are arranged at a V-shaped angle, and the opening direction of the V-shaped angle is opposite to the pulling direction. The two wedge blocks are provided with horizontal through holes 17 on the side faces of the ends close to each other, and the aperture of the through holes 17 is between the minimum diameter and the maximum diameter of the conical structure. The end of the first wedge block 13 away from the second wedge block 14 is provided with a vertical first pin shaft, and the end of the second wedge block 14 away from the first wedge block 13 is provided with a vertical second pin shaft. The first pin shaft penetrates the upper support plate 9 and is vertically connected to the first connecting plate 15. The second pin shaft penetrates the upper support plate 9 and is vertically connected to the second connecting plate 16. A slide groove is provided on the first connecting plate 15, and a slider is provided on the second connecting plate 16. The slider is arranged in the slide groove. The first connecting plate 15 is connected to the upper support plate 9 by a spring 19. The top block includes a front top block 12 arranged at the front end of the piston and a rear top block 11 arranged at the rear end of the piston. One end of the wire rope segmented positioning rope 2 is connected to the wire traction rope 1, and the other end is arranged through the hollow cylinder 3.

[0038] like Figure 9-10As shown, the first rail clamp 4 includes a clamping block body 41 and a connecting body 42 connected to the clamping block body 41, the clamping block body 41 and the connecting body 42 are arranged at an angle, and the overall appearance of the first rail clamp 4 is an inner angled square, that is, the clamping block body 41 and the connecting body 42 are not arranged on the same straight line, the connecting body 42 includes two horizontal ear structures 421 arranged up and down, a gap is arranged between the two ear structures 421, the two ear structures 421 are provided with holes, and a rope pin 46 is arranged through the hole, and the rope is arranged on the part of the rope pin 46 located between the two ears, and a U-shaped groove 43 is arranged below the clamping block body 41 for matching with the upper part of the rail, and circular grooves 44 are arranged on both side walls of the groove 43, and the two circular grooves 44 are staggered along the length direction of the rail, that is, the two circular grooves 44 are not axisymmetrically arranged about the center line of the length direction of the rail, and the forces on both sides of the circular groove 43 are different. The non-axisymmetric design can maximize the use of the structural size, such as Figure 8 As shown, a semicircular slider is provided in the circular groove 44, and one end of the semicircular slider for contacting the rail is provided with a tooth groove structure 6 for increasing the friction coefficient and the bite force. A positioning pin 45 is provided at the bottom of the block body 41, and a positioning pin guide groove 7 is provided at the bottom of the semicircular slider. One end of the positioning pin 45 is provided in the positioning pin guide groove 7. The positioning pin guide groove 7 cooperates with the positioning pin 45, which improves the positioning accuracy of the semicircular slider during the rotation of the upper structure of the block body 41 and prevents the slider from falling during the installation process, thereby ensuring the safety of the device and personnel.

[0039] According to the relationship diagram between the friction coefficient μ required by the device and the vertical distance from the rope threading hole to the center of the rope pin 46, the block body 41 and the connecting body 42 are designed to be an inner angle structure. This design has the following advantages: ① The inner angle structure reduces the vertical distance from the rope threading hole to the center of the rotating pin, thereby reducing the friction coefficient required by the device; ② It is easy to distinguish the left and right blocks and is convenient to use.

[0040] The two sides of the hollow cylinder 3 are connected to the two first rail clamps 4 by ropes respectively. The two first rail clamps 4 are symmetrically arranged along the axis of the hollow cylinder 3. The connecting body 42 deflects in the pulling direction relative to the clamping block body 41. When the hollow cylinder 3 starts to work, the clamping block body 41 starts to rotate under the traction of the rope pin 46, driving the two semicircular sliders to clamp the rail head. The greater the traction force, the greater the normal force of the contact surface between the slider and the rail, and the greater the friction force, the self-locking of the device is completed, which can be regarded as being consolidated with the rail, safe and reliable.

[0041] The traction equipment of this embodiment is suitable for traction of unloaded vehicles, and the pulling distance is large at one time. The main parameters of the traction equipment are as follows. The size of the traction distance affects the length of the traction rope and the node positioning rope of the wire rope 32. The traction distance of this embodiment is determined to be about 4.6m.

[0042] (1) Ultra-high pressure pump station

[0043] Power: 4.0kW;

[0044] Output flow: 2.3L / min.

[0045] (2) Titanium alloy traction hollow cylinder 3

[0046] Main cylinder diameter / rod diameter: 92mm / 82mm;

[0047] Rated working pressure: 50MPa;

[0048] Cylinder stroke: 330mm;

[0049] Cylinder traction capacity: 200kN.

[0050] (3) First track clamp 4

[0051] Rated clamping force: 200kN;

[0052] Fixing method: self-locking fixation;

[0053] Applicable rail types: 60, 75kg / m.

[0054] (4) Wire rope 32 jointed positioning rope

[0055] Wire rope 32 specifications: φ21-1*37-1870;

[0056] Wire rope 32 breaking force: 400kN;

[0057] Steel sleeve 31 consolidation force: 200kN;

[0058] Pitch / number of sections: 270mm / 38 sections.

[0059] (5) Wire traction rope 1

[0060] Specification: d24-6*37+FC-1870;

[0061] Length: 11m;

[0062] Breaking force: 318kN.

[0063] (6) Ultra-high pressure oil pipe

[0064] Maximum working pressure: 50MPa;

[0065] Length: 9m.

[0066] According to the pitch of 270mm of the node positioning rope of the wire rope 32, taking into account the extensibility of the node positioning rope of the wire rope 32, 4 pitches lie in the cylinder when in use, and the distance between the front top block 12 and the rear top block 11 in the free state is designed to be 780mm. The length of the hollow cylinder 3 when fully extended is 1110mm. When the 4 sections of the steel pressure sleeve 31 are in the cylinder, there is a remaining margin of 30mm to ensure that the rear top block 11 can support the vertical end of the steel pressure sleeve 31. When the hollow cylinder 3 is fully retracted, the 3 steel pressure sleeves 31 are in the cylinder. The hollow cylinder 3 extends 30mm to push the wire rope 32 pressure sleeve forward, and the effective stroke of 1 cylinder can pull the wire traction rope 1 to move 300mm.

[0067] The working process is that the hollow oil cylinder 3 extends outward under the drive of the pump station. At this time, the front top block 12, under the action of the piston, presses against the vertical end (bearing end) of the steel pressing sleeve 31 in the segmented positioning rope of the segmented steel wire rope 32 and pulls it forward. The conical end (passing end) of the steel pressing sleeve 31 presses against the two wedge blocks of the rear top block 11. The two wedge blocks rotate around the first pin and the second pin respectively. The two wedge blocks of the rear top block 11 are stretched open, so that the steel pressing sleeve 31 passes through. After the steel pressing sleeve 31 passes through, the two wedge blocks of the rear top block 11 The wedge blocks are reset under the action of the spring 19. When a steel pressing sleeve 31 is completely pulled out, the control valve is operated to move the hollow cylinder 3 back. At this time, the rear top block 11 presses against the vertical end of the steel pressing sleeve 31, and the front top block 12 retracts along the conical end of a steel pressing sleeve 31 arranged behind the pulled out steel pressing sleeve 31, that is, the rear steel pressing sleeve 31 passes through the front top block 12 so that the front top block 12 can press against it when the hollow cylinder 3 is extended next time. This reciprocating cycle is repeated to complete the rerailing of the accident locomotive and vehicle.

[0068] Example 2

[0069] like Figure 5-6 As shown, the difference between this embodiment and embodiment 1 is that: the end of the traction rope away from the steel wire rope segmented positioning rope is connected to the second track device 8 through a fixed pulley 22, the structure of the second track device 8 is exactly the same as the structure of the first track device 4, the fixed pulley 22 is connected to the rescue vehicle 5 through a hook, the fixed pulley 22 is hinged to the end of the hook away from the rescue vehicle 5, two second track devices 8 are provided, the two second track devices 8 are symmetrically arranged about the steel wire traction rope 1, and the end of the traction rope away from the steel wire rope segmented positioning rope is connected to the second track device 8 through a connecting device, as shown in FIG. Fig.15 As shown, the connecting device includes a pulley 22, a connecting splint 20 and a traction hook 23. The pulley 22 is hinged to the connecting splint 20 through a splint pin 21. The traction hook 23 is hinged to the connecting splint 20 through a hook pin 24. The traction rope is set on the pulley 22. The traction hook 23 is used to connect to the rescue vehicle 5. A cylindrical cap 25 is set at one end of the splint pin 21 to facilitate the insertion of the splint pin 21.

[0070] The diameter of the pulley 22 groove of the pulley 22 is larger than the diameter of the wire traction rope 1. In the present embodiment, the diameter of the pulley 22 groove is 1.1 times the diameter of the wire traction rope 1. Because the pulley 22 moves in the clamping plate groove of the closed structure through the clamping plate pin 21, the wire traction rope 1 will not jump out of the pulley 22, so the height of the pulley 22 groove is set to be equal to the diameter of the wire traction rope 1.

[0071] The traction equipment of this embodiment is suitable for traction of heavy-loaded locomotives or fully loaded trucks, and is connected using a pulley 22. At this time, the traction force is increased to twice that of the traction cylinder, which can meet the requirements of pulling and rescuing heavy-loaded locomotives and vehicles.

[0072] The hydraulic traction equipment and rail fixing device of the present invention are easy and reliable to install, the step-by-step traction mode has a steady and controllable speed, and the mass of the cylinder unit is small when the traction force is constant. Through the coordinated use of the equipment and the rail rerailer, the rescue needs of locomotives and vehicles in various special environments such as tunnels and bridges when there is no other power for pulling the rerailer can be met.

[0073] The beneficial effects of the machine of the present invention compared with the prior art are as follows:

[0074] (1) The hydraulic traction equipment adopts the pulley 22 mechanism for the first time, which greatly reduces the mass of the oil cylinder. The equipment has two usage modes: ordinary vehicle pulling and rescue can be carried out without the pulley 22 device, and the pulling and rescue distance is large; heavy-loaded locomotive vehicle pulling and rescue can use the pulley 22 device, which has a large traction force.

[0075] (2) The track clamp adopts an eccentric, lever-type self-locking track clamping method, which is easy to install and disassemble, and the track locking is safe and reliable. The non-axisymmetric semicircular clamping groove 43 design can maximize the use of the structural dimensions. The clamping block with an inner angle structure reduces the vertical distance from the rope threading hole to the center of the rotating pin, reduces the friction coefficient required for the device, and is conducive to distinguishing the left and right clamping blocks, which is convenient for installation.

[0076] (3) The hollow oil cylinder 3 is used in conjunction with the steel wire rope 32, which reduces the number of components and facilitates installation.

[0077] The above content is a further detailed description of the present invention in combination with a specific preferred embodiment. It cannot be determined that the specific embodiments of the present invention are limited to this. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the present invention, which should be regarded as belonging to the present invention and the scope of patent protection determined by the submitted claims.

Claims

1. A variable pulling force hydraulic traction machine, characterized in that: It includes a traction rope for connecting with the vehicle to be rescued, a steel wire rope with a segmented positioning rope, a hollow oil cylinder and a rail clamp for installation above the rail, the steel wire rope with a segmented positioning rope includes a steel wire rope and a compression sleeve sleeved on the steel wire rope at intervals, the compression sleeve is a hollow cylindrical structure, and a conical structure is provided at one end of the compression sleeve away from the vehicle to be rescued, and the maximum diameter of the conical structure is equal to the diameter of the compression sleeve; The hollow oil cylinder comprises a piston and a top block connected with the piston, the top block comprises an upper support plate, a lower support plate and a first wedge block and a second wedge block arranged between the upper support plate and the lower support plate, the first wedge block and the second wedge block are arranged at a V-shaped angle, the opening direction of the V-shaped angle is opposite to the pulling direction, the two wedge blocks are provided with through holes on the side surfaces of the ends close to each other, the aperture of the through holes is between the minimum diameter and the maximum diameter of the conical surface structure, the first wedge block is provided with a first pin at one end away from the second wedge block, the second wedge block is provided with a second pin at one end away from the first wedge block, the axes of the first pin and the second pin are both perpendicular to the through holes, the first pin passes through the upper support plate and is vertically connected to the first connecting plate, the second pin passes through the upper support plate and is vertically connected to the second connecting plate, the first connecting plate is provided with a slide groove, the second connecting plate is provided with a slider, the slider is arranged in the slide groove, the first connecting plate is connected to the upper support plate through a spring, the top block comprises a front top block arranged at the front end of the piston and a rear top block arranged at the rear end of the piston; The upper support plate and the lower support plate are connected by an intermediate support plate, the intermediate support plate is vertically arranged, and a hole for the pressing sleeve to pass through is arranged on the intermediate support plate in a horizontal direction; One end of the steel wire rope with a node positioning rope is connected to the traction rope, and the other end is arranged through the hollow oil cylinder; The hollow oil cylinder is connected to the rail clamp through a rope; The rail clamp comprises a clamping block body and a connecting body connected to the clamping block body, wherein the clamping block body and the connecting body are arranged at an angle, a rope pin is arranged on the connecting body for connecting with the rope, a clamping groove is arranged below the clamping block body, circular grooves are arranged on both side walls of the clamping groove, and the two circular grooves are arranged staggered along the length direction of the rail, a semicircular slider is arranged in the circular groove, a positioning pin is arranged at the bottom of the clamping block body, a positioning pin guide groove is arranged at the bottom of the semicircular slider, and one end of the positioning pin is arranged in the positioning pin guide groove; One end of the semicircular sliding block that is used for contacting the rail is arranged as a tooth groove structure.

2. The variable tension hydraulic traction tool according to claim 1, characterized in that: The track clamp comprises a first track clamp and a second track clamp, the hollow oil cylinder is connected to the first track clamp via a rope, the end of the traction rope away from the wire rope segmented positioning rope is connected to the second track clamp via a connecting device, the connecting device comprises a pulley, a connecting splint and a traction hook, one end of the connecting splint is connected to the pulley via a splint pin, and the other end is connected to the hook via a hook pin, the traction rope is arranged on the pulley, and the traction hook is used to be connected to the vehicle to be rescued.

3. The variable tension hydraulic traction tool according to claim 2, characterized in that: There are two second track baffles, and the two second track baffles are symmetrically arranged with respect to the traction rope.

4. The variable tension hydraulic traction tool according to claim 2, characterized in that: One end of the clamping plate pin is provided with a cylindrical cap to facilitate the plugging of the clamping plate pin.

5. The variable tension hydraulic traction tool according to claim 2, characterized in that: There are two first rail clamps, and the two first rail clamps are symmetrically arranged about the axis of the hollow oil cylinder.

6. The variable tension hydraulic traction implement according to claim 1, characterized in that: The traction rope is connected to the vehicle to be rescued through a connecting device.

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