Saddle-type traction seat and mobile rescue vehicle

Abstract

The invention relates to the technical field of saddle traction seats and solves the technical problem that locking is easy to occur when a pull rod is displaced due to relying on spring locking. The invention comprises a saddle traction frame, an inner side of the saddle traction frame is provided with a saddle arc groove, an outer side of the saddle arc groove is provided with a positioning card slot, the saddle traction frame is rotatably connected to the embracing frame through a second traction shaft, the second traction shaft is sleeved with a coil spring, an embracing extension plate is fixedly installed on the outer side of the embracing frame, a supporting spring is provided inside the embracing extension plate, a positioning card block is fixedly installed on the supporting spring, a release frame is rotatably installed in the saddle arc groove through the first traction shaft, an adjustment plate is slidably provided at the inner end head of the saddle arc groove, and a limiting slider is fixedly installed on the other end of the release frame, and the limiting slider slides on the inner side of the adjustment plate through the limiting slide slot. Since the locking of the invention relies on the positioning card block to be stuck in the positioning card slot, it can still be locked normally, thereby reducing safety hazards.

Description

Technical Field

[0001] The invention relates to the technical field of saddle-type traction seats, in particular to a saddle-type traction seat and a motorized rescue vehicle. Background Art

[0002] The saddle-type traction seat is a special device used to tow and separate the towed device of a motorized rescue vehicle. It is mainly used on motor vehicles. Rescue vehicles are now mostly motorized rescue vehicles. They are then used in conjunction with a saddle-type traction seat for traction and rescue. They can also be used in conjunction with rescue equipment for rescue.

[0003] During the actual use of the saddle-type traction seat, customers have reported that the locking shaft may be detached. Once the locking shaft is detached during the traction process, it may cause a great safety hazard, so the risk of saddle-type traction detachment must be reduced.

[0004] After analysis by R&D personnel, it was found that the internal locking of the current saddle-type traction seat mainly relies on the springs of the structure on both sides. When the springs are excessively worn or broken, it will cause a safety hazard to the locking, causing the towed device to disengage. In addition, the locking and release are performed by a sliding rod. If the rod is accidentally touched or displaced due to vibration, the towed device will also be disengaged, thereby causing a safety risk of locking.

[0005] Moreover, when the saddle-type traction seat is locked for traction, the saddle-type traction seat and the locking shaft of the towed device are in rigid contact. During the traction process, the saddle-type traction seat and the locking shaft will cause friction damage due to shaking. In order to reduce wear, lubricating oil will be manually applied during traction, and automatic lubrication cannot be achieved.

[0006] In addition, since the main locking of the saddle type traction seat is completed by the spring, after long-term use, if an emergency occurs during the traction process, the spring of the saddle type traction seat will be completely destroyed, which will cause a great safety hazard. The existing saddle type traction seat has no further backup safety measures.

[0007] On this basis, the present invention provides a saddle-type traction seat and a motorized rescue vehicle to solve the above problems. Summary of the Invention

[0008] In view of the above situation, in order to overcome the defects of the existing technology, the present invention provides a saddle-type traction seat and a mobile rescue vehicle. The present invention has an ingenious structure and focuses on practicality. It effectively solves the technical problems that the existing saddle-type traction seat structure design mainly relies on spring locking, and the displacement of the pull rod is prone to locking risks, the saddle-type traction seat cannot be automatically lubricated, and there are no further backup safety measures.

[0009] To achieve the above object, the present invention adopts the following technical solutions:

[0010] The saddle-type traction seat comprises a saddle-type traction frame, wherein the inner side of the saddle-type traction frame is provided with a saddle-type arc groove, and the outer side of the saddle-type arc groove is provided with two symmetrical positioning slots. The saddle-type traction frame is internally connected to the embracing frame by two symmetrically arranged second traction shafts, and the second traction shaft is sleeved with a coil spring connected to the embracing frame. The outer side of the embracing frame is fixedly installed with an embracing extension plate, and a supporting spring is provided inside the embracing extension plate. One end of the supporting spring is fixedly installed with a positioning block that slides inside the embracing extension plate and slides with the positioning slot. A release frame that can contact the positioning block is rotatably installed in the saddle-type arc groove by two symmetrically arranged first traction shafts, and an adjustment plate is slidably provided at the inner end of the saddle-type arc groove. A limiting slider is fixedly installed on the other end of the release frame, and each limiting slider is slidably connected to the inner side of the adjusting plate through a limiting slot provided on the adjusting plate.

[0011] Preferably, a threaded sleeve is fixed inside the saddle-type arc groove, a first threaded rod is threadedly connected inside the threaded sleeve, a knob placed outside the saddle-type traction frame is welded to one end of the first threaded rod, and the first threaded rod is rotatably mounted on one side of the adjustment plate.

[0012] Preferably, the inner wall of the encircling frame is provided with an inner cavity connected to the outside, the lower end of the inner cavity is connected to an oil supply box placed in the encircling frame, the bottom of the oil supply box is provided with an oil collecting groove, the upper end of the oil supply box is connected to an air bag placed in the inner cavity and one side is placed outside, a plurality of oil supply pipes are installed in the oil supply box, one end of the oil supply pipe is placed in the oil collecting groove, the other end of the oil supply pipe extends from the upper end of the air bag and is bent inward, an auxiliary sponge that wraps the plurality of oil supply pipes is fixed to the upper end of the air bag, the air bag is connected to an external air supply source, and the oil supply box is connected to an external oil supply tank.

[0013] Preferably, the airbag is externally connected to a small air supply pump via a solenoid valve, a liquid level sensor is installed in the oil supply box, and the oil supply box is connected to the oil supply tank via an oil filling pipe and a solenoid valve.

[0014] Preferably, the coil spring is connected to the controller via a first force sensor, and the support spring is connected to the controller via a second force sensor.

[0015] Preferably, a connecting shaft is installed on the outer side of the embracing frame, which is symmetrically arranged and rotatably placed on the saddle-type traction frame. A spare embracing is fixedly connected to the surface of the connecting shaft. A reset spring is sleeved on the connecting shaft. An annular electromagnet is sleeved on the outer side of the connecting shaft. The upper end of the electromagnet contacts a ferromagnetic metal ring that is integrally connected to the connecting shaft.

[0016] Preferably, the limiting sliding groove is an elliptical groove, the limiting sliding block is cylindrical, and the limiting sliding block is tangent to the inner wall of the limiting sliding groove.

[0017] Preferably, the number of the embracing frames is two, and each embracing frame is provided with two semicircular embracing rings spaced apart from each other, and the four embracing rings are installed in an interlaced manner.

[0018] Preferably, the number of the backup rings is two, and the two backup rings are symmetrically arranged.

[0019] A motorized rescue vehicle also includes a motor vehicle body and a mounting frame fixedly mounted on the motor vehicle body. A saddle-type traction seat is fixedly mounted on the rear end of the mounting frame, and rescue equipment is provided on the mounting frame.

[0020] The present invention has the following technical effects.

[0021] 1. The present invention uses a coil spring to limit the position, so that the embracing frame can always be kept in the expanded state before being subjected to external force, and can more conveniently and safely complete the connection between the saddle traction frame and the locking shaft. When the locking shaft gradually approaches the inside of the saddle traction frame, the locking shaft pushes the embracing frame to rotate, thereby driving the embracing extension plate to rotate accordingly. When the embracing extension plate moves to the positioning slot position, the positioning block is not restricted. At this time, the supporting spring directly pushes the positioning block out and snaps it into place to complete self-locking. At the same time, the embracing frame embracing the locking shaft is connected, which is simple to operate and has high connection efficiency. When the coil spring is excessively worn or broken, the locking can still be normally locked because the locking relies on the positioning block to be stuck in the positioning slot, reducing safety hazards. When the first threaded rod is rotated, the adjustment plate is driven to move with the help of the fixedly installed threaded sleeve, and the adjustment plate pushes the release frame to slide inside the adjustment plate, and at the same time drives the release frame to swing with the first traction shaft as the axis. The release frame can push the positioning block out of the positioning slot, thereby completing the unlocking work efficiently and conveniently, and the process is simple. The first threaded rod is a threaded rotation connection, and even if it is accidentally touched or shaken, it will not cause the lock to be released.

[0022] 2. The present invention provides an airbag because the locking shaft and the embracing frame are bound to be squeezed and collided during actual operation. When the airbag is squeezed, the lubricating oil inside the airbag is squeezed out from the oil supply box and the oil supply pipe, and the surface of the locking shaft is lubricated with the help of an auxiliary sponge that can absorb and diffuse. The application of lubricating oil is used to reduce impact friction and can effectively protect the connection.

[0023] 3. The present invention can lock the metal ring and the spare ring by setting an electromagnet. Even if the coil spring and the support spring are all damaged, the spare ring can temporarily surround and protect the locking shaft, reducing the risk of the locking shaft detaching. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0026] Figure 2 It is a front view structural schematic diagram of the present invention.

[0027] Figure 3 It is a schematic diagram of the cross-sectional structure of the saddle-type traction seat in the present invention.

[0028] Figure 4 The three-dimensional cross-sectional structure of the saddle type traction seat in the present invention is shown in FIG. Figure 1 .

[0029] Figure 5 The three-dimensional cross-sectional structure of the saddle type traction seat in the present invention is shown in FIG. Figure 2 .

[0030] Figure 6 for Figure 5 Enlarged view of point A in the middle.

[0031] Figure 7 It is a schematic cross-sectional view of the encircling frame of the present invention.

[0032] Reference numerals:

[0033] 1-saddle type traction frame; 2-saddle type arc groove; 3-positioning card slot; 4-second traction shaft; 5-encircling frame; 6-coil spring; 7-encircling extension plate; 8-support spring; 9-positioning card block; 10-first traction shaft; 11-release frame; 12-adjustment plate; 13-limiting slider; 14-limiting slide groove; 15-threaded sleeve; 16-first threaded rod; 17-knob; 18-inner cavity; 19-oil supply box; 20-oil collecting tank; 21-airbag; 22-oil supply pipe; 23-auxiliary sponge; 24-liquid level sensor; 25-oil filling pipe; 26-first force sensor; 27-second force sensor; 28-connecting shaft; 29-spare encircling frame; 30-reset spring; 31-electromagnet; 32-metal ring; 33-motor vehicle body; 34-mounting frame; 35-traction plate; 36-locking shaft. DETAILED DESCRIPTION

[0034] The above and other technical contents, features and effects of the present invention are described below with reference to the attached Figures 1 to 7 The details of the embodiments will be clearly presented. The contents mentioned in the following embodiments are all based on the accompanying drawings.

[0035] Various exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

[0036] The present invention is a saddle-type traction seat, which is mainly used to solve the problem that the existing saddle-type traction seat structure design mainly relies on spring locking and the pull rod is prone to locking risks when it is displaced. It includes a saddle-type traction frame 1, the overall appearance of which is saddle-shaped, the top of the saddle-type traction frame 1 cooperates with a traction plate 35 of a traction device, the traction plate 35 is equivalent to a part of the traction device, a locking shaft 36 is fixed on the traction plate 35, a saddle-type arc groove 2 is provided on the inner side of the saddle-type traction frame 1, two symmetrically arranged positioning slots 3 are provided on the outer side of the saddle-type arc groove 2, two symmetrically arranged second traction shafts 4 are fixed inside the saddle-type traction frame 1, the second traction shaft 4 is rotatably connected to an embracing frame 5, the embracing frame 5 is an arc structure, and its curvature is consistent with the locking shaft 36 The outer shape of the circumferential frame 5 is adapted to be used for limiting and fixing it. The interior of the circumferential frame 5 is clamped with a locking shaft 36 fixedly installed at the bottom of the pulled plate 35. The second traction shaft 4 is provided with a coil spring 6 connected to the circumferential frame 5. The coil spring 6 can limit the elastic force of the circumferential frame 5. An circumferential extension plate 7 is fixedly installed on the outside of the circumferential frame 5. A supporting spring 8 is fixed inside the circumferential extension plate 7. One end of the supporting spring 8 is fixedly mounted with a positioning block 9 that is slidably adapted to the positioning slot 3, and the positioning block 9 is slidably arranged in the circumferential extension plate 7, so that the supporting spring 8 can continuously push the positioning block 9 to expand outward to assist positioning. When expanded, the supporting spring 8 is in a natural state or a compressed state.

[0037] When the locking shaft 36 is in the state of compression, the locking block 9 is in the state of compression against the supporting spring 8, so that the locking shaft 36 can be pressed against the inner arc part of the surrounding frame 5, thereby pushing the surrounding frame 5 to rotate around the second traction shaft 4.

[0038] Two symmetrically arranged first traction shafts 10 are fixed inside the saddle-type arc groove 2. The first traction shaft 10 is rotatably installed with a release frame 11 that can contact the surface of the positioning block 9. An adjustment plate 12 is slidably installed at the internal end of the saddle-type arc groove 2. A limit slider 13 is fixedly installed at the other end of the release frame 11. Limiting grooves 14 are provided on both sides of the adjustment plate 12. The limit slider 13 can slide in the limiting groove 14. The limiting groove 14 is an elliptical groove, and the limiting slider 13 is cylindrical. The limiting slider 13 is tangent to the inner wall of the limiting groove 14. The two limiting sliders 13 slide in the limiting grooves 14 at both ends of the same adjustment plate 12.

[0039] A threaded sleeve 15 is fixed inside the saddle-type arcuate groove 2, and a first threaded rod 16 is threadedly connected to the inside of the threaded sleeve 15. A knob 17 is welded to one end of the first threaded rod 16. The knob 17 is placed on the outside of the saddle-type traction frame 1. The first threaded rod 16 is rotatably mounted on one side of the adjustment plate 12. Specifically, it can be connected by a sleeve or a bearing seat, so that when the first threaded rod 16 is rotated, only the adjustment plate 12 is pulled to move, without driving the adjustment plate 12 to rotate.

[0040] There are two embracing frames 5, and each embracing frame 5 is provided with two semicircular embracing rings spaced apart from each other, and the four embracing rings are installed in an interlaced manner.

[0041] When the traction frame 5 is in the initial state of being in the expanded state, the positioning block 9 is initially compressed and placed on the outer wall of the saddle-type arc groove 2. When the locking shaft 36 gradually approaches the saddle-type traction frame 1 from the outside, it enters the traction frame 5 and contacts the arc portion inside the traction frame 5, thereby pushing the traction frame 5 to start rotating. The positioning block 9 moves to a position close to the positioning slot 3. When the traction frame 5 drives the traction extension plate 7 to rotate to the position of the positioning slot 3, the supporting spring 8 pushes the positioning block 9 out and snaps into the positioning slot 3 to achieve locking. At the same time, the traction frame 5 is completely connected to the locking shaft 36. The four interlaced traction rings lock the locking shaft 36. When the traction plate 35 needs to be disengaged, the rotation The knob 17 is turned to drive the first threaded rod 16 to rotate, and the adjusting plate 12 is driven to move backward with the help of the fixed threaded sleeve 15. The adjusting plate 12 pulls the release frame 11 to swing. When the release frame 11 contacts the positioning block 9 and pushes the positioning block 9 into the interior of the embracing extension plate 7 after contact, the motor vehicle body 33 is driven forward or the traction plate 35 is moved backward. The locking shaft 36 moves away from the saddle type traction frame 1, and in the process of moving away, the locking shaft 36 pushes the outer arc-shaped part of the embracing frame 5 outward, so that the embracing extension plate 7 and the positioning block 9 are disengaged from the positioning slot 3, and the positioning block 9 is re-compressed against the outer wall of the saddle type arc slot 2. At this time, with the action of the coil spring 6, the embracing frame 5 is reset to its initial state, completing the traction and disengagement of the saddle type traction frame 1.

[0042] As an embodiment, an inner cavity 18 is provided on the inner side wall of the embracing frame 5. The inner cavity 18 is equivalent to an arc-shaped groove. The lower end of the inner cavity 18 is connected to an oil supply box 19 provided in the embracing frame 5. Only the upper end of the oil supply box 19 is connected to the inner cavity 18. An oil collecting groove 20 is provided at the bottom of the oil supply box 19. The oil collecting groove 20 is inclined and can store lubricating oil in the oil collecting groove 20. An airbag 21 is installed in the inner cavity 18. There are two embodiments for installing the airbag 21:

[0043] First, the airbag 21 is opened at the lower end and communicates with the oil supply box 19. Part of the airbag 21 is placed in the inner cavity 18, and part is placed on the outside of the surrounding frame 5. The connection between the airbag 21 and the oil supply box 19 is a sealed connection.

[0044] Second, the airbag 21 is independently sealed. The airbag 21 is plugged into the inner cavity 18. Part of the airbag 21 extends into the oil supply box 19, and part of it is placed on the outside of the surrounding frame 5. The connection between the airbag 21 and the oil supply box 19 is a sealed connection.

[0045] During traction, the airbag 21 can contact the locking shaft 36, and multiple oil supply pipes 22 are installed in the oil supply box 19. The oil supply pipes 22 can cooperate with the airbag 21 to supply oil to the locking shaft 36. The multiple oil supply pipes 22 are evenly distributed in the oil supply box 19, one end of the oil supply pipe 22 is placed in the oil collecting tank 20, and the other end extends to the airbag 21 and passes through the airbag 21 upward and then bends inward. An auxiliary sponge 23 with the same curvature as the embrace frame 5 is fixed at the upper end of the airbag 21. The auxiliary sponge 23 wraps the multiple oil supply pipes 22, and the auxiliary sponge 23 can absorb and diffuse the lubricating oil, reducing the situation where the lubricating oil drips onto the ground and causes waste. At the same time, when the motor vehicle body 33 is turning, the collision friction between the locking shaft 36 and the embrace frame 5 is large, and the auxiliary sponge 23 can be used to apply a large area of ​​​​the surface of the locking shaft 36. There is an air supply pipe on the airbag 21, and the air supply pipe is connected to the air supply source, and the oil supply box 19 is connected to the oil supply tank.

[0046] The air bag 21 is connected to an air supply pipe, which can be connected to an external manual air supply device, such as a manual inflation pipe. An air inlet valve and an air outlet valve switch are installed on the air supply pipe.

[0047] The air bag 21 is connected to the air supply pipe, which can be connected to an external automatic air supply device. A solenoid valve is installed on the air supply pipe, which has its own air intake and outlet functions. The air supply pipe is connected to a small air supply pump, and the solenoid valve and the electric small air supply pump are connected to a small controller unit and a power supply.

[0048] A liquid level sensor 24 is installed in the oil supply box 19, and the oil supply box 19 is connected to the oil filling pipe 25, the oil filling pipe 25 is connected to the solenoid valve, and the oil filling pipe 25 is connected to the oil supply tank. The solenoid valve and the liquid level sensor 24 are connected to the small controller unit and the power supply.

[0049] During the traction process, the locking shaft 36 shakes and squeezes the airbag 21, causing the air pressure inside the oil supply box 19 to increase, and the lubricating oil is squeezed from the oil supply pipe 22 into the auxiliary sponge 23 to wet the auxiliary sponge 23 to lubricate the locking shaft 36. Since the auxiliary sponge 23 has adsorption properties, a large amount of lubricating oil will not drip after being squeezed out, thereby avoiding a large amount of lubricating oil waste.

[0050] At the beginning of traction, the airbag 21 is inflated, causing the air pressure in the oil supply box 19 to increase, so that the lubricating oil in the oil supply box 19 is squeezed onto the auxiliary sponge 23 through the oil supply pipe 22 in advance, and no manual application is required.

[0051] The pressure variation range when squeezing the airbag 21 is not large, and as the lubricating oil in the oil supply box 19 decreases, the pressure of the lubricating oil needs to be greater each time it is squeezed out, so the liquid level sensor 24 is used to detect the height of the lubricating oil level. When a certain liquid level is reached, the oil supply tank replenishes the oil supply box 19.

[0052] If the airbag 21 is installed in the first manner, squeezing the airbag 21 will directly increase the air pressure in the oil supply box 19, thereby achieving oil supply.

[0053] If the second installation method of the airbag 21 is used, squeezing the airbag 21 will cause the airbag 21 placed in the oil supply box 19 to expand, indirectly causing the air pressure in the oil supply box 19 to increase, thereby achieving oil supply.

[0054] As an embodiment, a first force sensor 26 is connected to the end of the coil spring 6 that is subjected to force, and a second force sensor 27 is connected to the end of the support spring 8 that is subjected to force. The first force sensor 26 and the second force sensor 27 are connected to a controller and a power supply.

[0055] Two symmetrically arranged connecting shafts 28 are fixedly mounted on the outside of the embracing frame 5. Both connecting shafts 28 are rotatably mounted on the saddle-type traction frame 1. A spare embracing 29 is fixedly connected to the connecting shaft 28. The spare embracing 29 is semicircular. A reset spring 30 is sleeved on the connecting shaft 28. An annular electromagnet 31 is sleeved on the outside of the connecting shaft 28. The electromagnet 31 is fixed on the saddle-type traction frame 1, that is, the electromagnet 31 does not rotate. The electromagnet 31 is connected to the controller and the power supply, and a metal ring 32 is integrally fixed on the connecting shaft 28. The metal ring 32 is ferromagnetic, for example, it is made of iron, and the upper end face of the electromagnet 31 contacts the lower end face of the metal ring 32.

[0056] In this embodiment, the two spare rings 29 are close to each other in the natural state of the return spring 30. During normal traction, the locking shaft 36 first touches the two spare rings 29. Since the force of the towed device moving forward or the motor vehicle body 33 moving backward is much greater than the force of the return spring 30, the locking shaft 36 first squeezes the spare rings 29 forward to rotate. Since there is a distance between the surround frame 5 and the spare ring 29, when the locking shaft 36 is squeezed to the extreme position of the spare ring 29, the locking shaft 36 continues to move forward into the surround frame 5. At this time, the locking shaft 36 is out of contact with the spare ring 29, and the locking shaft 36 continues to move forward. The spare ring 29 is reset under the action of the return spring 30.

[0057] When an emergency occurs, for example, when the coil spring 6 and the support spring 8 are all damaged, the positioning block 9 will be separated from the positioning slot 3 due to shaking during the traction process, and the embracing frame 5 will be separated from the locking shaft 36 due to the traction shaking. Then, the two spare embracing frames 29 can have a certain blocking effect on the locking shaft 36 in a natural state, so that the locking shaft 36 will slowly separate instead of suddenly separating.

[0058] However, the force of the return spring 30 is not enough to prevent the locking shaft 36 from being locked for a long time. This is to give the staff time to react.

[0059] The first force sensor 26 detects the elastic force signal of the coil spring 6, and the second force sensor 27 detects the signal of the support spring 8, for example:

[0060] During the traction process, the safe elastic force value range of the coil spring 6 is between F1 and F2, and the safe elastic force range of the support spring 8 is between F3 and F4.

[0061] If the signal detection of the support spring 8 is out of the range between F3 and F4, the support spring 8 is damaged. However, since the positioning block 9 is still stuck in the positioning slot 3, the locking shaft 36 is still in a locked state, but the support spring 8 needs to be detected and replaced.

[0062] If the signal detection of the coil spring 6 is out of the range of F1-F2, the coil spring 6 is damaged and the positioning block 9 may be out of the positioning slot 3. Then a signal is sent to the controller, and the controller sends a signal to energize the electromagnet 31. At this time, the electromagnet 31 has strong magnetism after being energized, and can absorb the metal ring 32 so that the connecting shaft 28 and the spare ring 29 are locked and immovable. At this time, the two spare rings 29 are close to each other. Once the locking shaft 36 is detached, it will be blocked by the two spare rings 29 to prevent it from detaching. Subsequent staff will repair and replace it.

[0063] Then, when the elastic force range of the coil spring 6 is out of the way, a signal controller is required to be sent, and the controller sends a signal to energize the electromagnet 31 .

[0064] The best thing is that when either the coil spring 6 or the support spring 8 is out of range, a signal needs to be sent to the controller, and the controller sends a signal to energize the electromagnet 31.

[0065] It should be noted that the upper surface of the electromagnet 31 is in contact with the metal ring 32. When the electromagnet 31 is energized, its strong magnetism is sufficient to fix the metal ring 32 so that it does not rotate. However, since the connection is a rotating contact connection, a more reliable connection method is now proposed.

[0066] A plurality of lower card slots are provided at evenly spaced intervals on the upper surface of the electromagnet 31, and a plurality of upper card slots are provided at corresponding positions on the lower surface of the metal ring 32. A plurality of upper card blocks are slidably installed in the upper card slots via small springs. The upper card blocks are placed in the upper card slots in a natural state. When the electromagnet 31 is energized, the upper card blocks are adsorbed and moved into the lower card slots for locking.

[0067] It should be noted that the positions of the electromagnet 31 and the metal ring 32 can be replaced, that is, the electromagnet 31 is fixed to the upper inner wall inside the saddle-type traction frame 1, and the metal ring 32 is fixed to the upper end of the connecting shaft 28, but is placed on the lower end face of the electromagnet 31. A lower card slot is provided on the lower surface of the electromagnet 31, and an upper card slot is provided on the upper surface of the metal ring 32. The upper card block is adsorbed and slides upward to be clamped into the lower card slot.

[0068] A motorized rescue vehicle. Most rescue vehicles are now motor vehicles, and corresponding rescue equipment is installed on them, including but not limited to excavators, openers, fire fighting equipment, etc.

[0069] It also includes a motor vehicle body 33, on which a mounting frame 34 is fixed, and a saddle-type traction seat is fixedly installed at the rear end of the mounting frame 34. Rescue equipment is equipped on the mounting frame 34. The rescue equipment is equipped according to actual needs. The present invention provides an embodiment of the rescue equipment.

[0070] For example, the rescue equipment is an excavator. The excavator includes a rotatably mounted cab, a control console, and a grab equipment. The grab equipment consists of a grab body and two support arms. The grab body and the support arms, and the two support arms are connected by hinges. Hydraulic cylinders are connected between the grab body and the support arms, and the two support arms.

[0071] Working principle:

[0072] When the rescue vehicle is saddle-towing, the motor vehicle body 33 can be driven to a position just in front of the towed plate 35 connected to the towed device. At this time, the motor vehicle body 33 is controlled to move backward or the towed device is controlled to move forward. When the saddle-towing frame 1 at the rear end of the motor vehicle body 33 gradually approaches the locking shaft 36 at the bottom of the towed plate 35, the locking shaft 36 first contacts the spare ring 29, and the spare ring 29 rotates inward. As the locking shaft 36 continues to move forward, the spare ring 29 disengages from the locking shaft 36, and the spare ring 29 is reset under the action of the reset spring 30, and the locking shaft 36 begins to enter the encircling frame 5.

[0073] The locking shaft 36 enters the embracing frame 5 and pushes the arc-shaped part inside the embracing frame 5, thereby driving the embracing frame 5 to rotate. When the embracing extension plate 7 on one side of the embracing frame 5 is pushed to the position of the positioning slot 3, the positioning block 9 is not restricted. At this time, the supporting spring 8 pushes the positioning block 9 out and snaps it into the inside of the positioning slot 3. At the same time, the embracing frame 5 just encircles and limits the locking shaft 36.

[0074] After the locking shaft 36 is limited, the airbag 21 is manually pressed to allow the lubricating oil to enter the auxiliary sponge 23 through the oil supply pipe 22, and no manual application is required.

[0075] During operation, with the collision and extrusion between the locking shaft 36 and the airbag 21, the lubricating oil automatically enters the auxiliary sponge 23 from the oil supply box 19. The auxiliary sponge 23 absorbs the lubricating oil to prevent the lubricating oil from dripping continuously, thereby reducing friction damage through the lubricating oil. It should also be noted that since the encircling rings on the encircling frame 5 are arranged at intervals up and down, only the airbag 21, auxiliary sponge 23 and other accessories need to be installed on one of the encircling rings. The locking shaft 36 is still in contact with the encircling frame 5, rather than completely in contact with the airbag 21. Therefore, the locking shaft 36 still needs to be lubricated. In order to avoid waste of lubricating oil, the outlet size of the oil supply pipe 22 is adjustable. In order to ensure that the lubricating oil is supplied with sufficient pressure, the liquid level sensor 24 detects the lubricating oil level to ensure the capacity of the lubricating oil in the oil supply box 19.

[0076] When an emergency occurs, when any detection signal of the coil spring 6 and the support spring 8 is out of range, a signal is sent to the controller, and the controller sends a signal to energize the electromagnet 31. The electromagnet 31 strongly magnetically attracts the metal ring 32, thereby fixing the spare ring 29 and alerting through the built-in alarm of the controller.

[0077] Even if the electromagnet 31 is damaged, the two spare rings 29 can block the locking shaft 36 to a certain extent due to the presence of the return spring 30, so that it will not disengage instantly. When the locking shaft 36 disengages from the spare ring 29, it needs to overcome the elastic force of the return spring 30, which can slow down the towed device to a certain extent and give the staff time to react, thereby further improving the safety of the towing process.

[0078] The present invention has the following technical effects.

[0079] 1. The present invention uses a coil spring to limit the position, so that the embracing frame can always be kept in the expanded state before being subjected to external force, and can more conveniently and safely complete the connection between the saddle traction frame and the locking shaft. When the locking shaft gradually approaches the inside of the saddle traction frame, the locking shaft pushes the embracing frame to rotate, thereby driving the embracing extension plate to rotate accordingly. When the embracing extension plate moves to the positioning slot position, the positioning block is not restricted. At this time, the supporting spring directly pushes the positioning block out and snaps it into place to complete self-locking. At the same time, the embracing frame embracing the locking shaft is connected, which is simple to operate and has high connection efficiency. When the coil spring is excessively worn or broken, the locking can still be normally locked because the locking relies on the positioning block to be stuck in the positioning slot, reducing safety hazards. When the first threaded rod is rotated, the adjustment plate is driven to move with the help of the fixedly installed threaded sleeve, and the adjustment plate pushes the release frame to slide inside the adjustment plate, and at the same time drives the release frame to swing with the first traction shaft as the axis. The release frame can push the positioning block out of the positioning slot, thereby completing the unlocking work efficiently and conveniently, and the process is simple. The first threaded rod is a threaded rotation connection, and even if it is accidentally touched or shaken, it will not cause the lock to be released.

[0080] 2. The present invention provides an airbag because the locking shaft and the embracing frame are bound to be squeezed and collided during actual operation. When the airbag is squeezed, the lubricating oil inside the airbag is squeezed out from the oil supply box and the oil supply pipe, and the surface of the locking shaft is lubricated with the help of an auxiliary sponge that can absorb and diffuse. The application of lubricating oil is used to reduce impact friction and can effectively protect the connection.

[0081] 3. The present invention can lock the metal ring and the spare ring by setting an electromagnet. Even if the coil spring and the support spring are all damaged, the spare ring can temporarily surround and protect the locking shaft, reducing the risk of the locking shaft detaching.

[0082] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description is not intended to limit the present invention. Various modifications and substitutions of the present invention will be readily apparent to those skilled in the art after reading the above description. Therefore, the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A saddle-type traction seat, comprising a saddle-type traction frame (1), characterized in that: The saddle-type traction frame (1) has a saddle-type arc groove (2) on the inner side, and two symmetrical positioning slots (3) are formed on the outer side of the saddle-type traction frame (2). The saddle-type traction frame (1) is internally connected to an embracing frame (5) through two symmetrically arranged second traction shafts (4). The second traction shafts (4) are sleeved with a coil spring (6) connected to the embracing frame (5). An embracing extension plate (7) is fixedly installed on the outer side of the embracing frame (5). A support spring (8) is provided inside the embracing extension plate (7). One end of the support spring (8) is fixedly installed with a spring that slides in the embracing frame. A positioning block (9) is provided inside the extension plate (7) and is slidably adapted to the positioning slot (3); a release frame (11) capable of contacting the positioning block (9) is rotatably installed in the saddle-shaped arc groove (2) via two symmetrically arranged first traction shafts (10); an adjustment plate (12) is slidably provided at the inner end of the saddle-shaped arc groove (2); a limiting slider (13) is fixedly installed at the other end of the release frame (11); each limiting slider (13) is slidably connected to the inner side of the adjustment plate (12) via a limiting slot (14) provided on the adjustment plate (12); The inner wall of the encircling frame (5) is provided with an inner cavity (18) connected to the outside, the lower end of the inner cavity (18) is connected to an oil supply box (19) placed in the encircling frame (5), the bottom of the oil supply box (19) is provided with an oil collecting groove (20), the upper end of the oil supply box (19) is connected to an air bag (21) placed in the inner cavity (18) and one side is placed outside, a plurality of oil supply pipes (22) are installed in the oil supply box (19), one end of the oil supply pipe (22) is placed in the oil collecting groove (20), the other end of the oil supply pipe (22) extends from the upper end of the air bag (21) and is bent inwardly, an auxiliary sponge (23) is fixed to the upper end of the air bag (21) for wrapping the plurality of oil supply pipes (22), the air bag (21) is connected to an external air supply source, and the oil supply box (19) is connected to an external oil supply tank.

2. A saddle-type traction seat according to claim 1, characterized in that: A threaded sleeve (15) is fixed inside the saddle-type arcuate groove (2), and a first threaded rod (16) is threadedly connected inside the threaded sleeve (15). A knob (17) is welded to one end of the first threaded rod (16) and is placed outside the saddle-type traction frame (1). The first threaded rod (16) is rotatably mounted on one side of the adjustment plate (12).

3. The saddle type fifth wheel according to claim 1, characterized in that: The air bag (21) is externally connected to a small air supply pump via a solenoid valve, a liquid level sensor (24) is installed in the oil supply box (19), and the oil supply box (19) is connected to the oil supply tank via an oil filling pipe (25) and a solenoid valve.

4. The saddle type fifth wheel according to claim 1, characterized in that: The coil spring (6) is connected to the controller via a first force sensor (26), and the support spring (8) is connected to the controller via a second force sensor (27).

5. The saddle type fifth wheel according to claim 4, characterized in that: A connecting shaft (28) symmetrically arranged and rotatably placed on the saddle-type traction frame (1) is fixedly mounted on the outer side of the embracing frame (5); a spare embracing frame (29) is fixedly connected to the surface of the connecting shaft (28); a return spring (30) is sleeved on the connecting shaft (28); an annular electromagnet (31) is sleeved on the outer side of the connecting shaft (28); the upper end of the electromagnet (31) contacts a ferromagnetic metal ring (32) integrally connected to the connecting shaft (28).

6. The saddle type fifth wheel according to claim 1, characterized in that: The limiting slide groove (14) is an elliptical groove, the limiting slider (13) is cylindrical, and the limiting slider (13) is tangent to the inner wall of the limiting slide groove (14).

7. The saddle type fifth wheel according to claim 1, characterized in that: The number of the embracing frames (5) is two, and each embracing frame (5) is provided with two semicircular embracing rings spaced apart from each other, and the four embracing rings are interlaced with each other.

8. The saddle type fifth wheel according to claim 5, characterized in that: The number of the spare rings (29) is two, and the two spare rings (29) are symmetrically arranged.

9. A mobile rescue vehicle, characterized in that: The invention comprises a saddle-type traction seat as claimed in any one of claims 1 to 8, and further comprises a motor vehicle body (33), a mounting frame (34) fixedly mounted on the motor vehicle body (33), a saddle-type traction seat being fixedly mounted at the rear end of the mounting frame (34), and a rescue device being provided on the mounting frame (34).

Images