Mechanical self-locking anti-falling traction locking device

Abstract

The invention discloses a mechanical self-locking anti-falling traction locking device which is characterized in that a traction pin is vertically fixed on a base, a traction pin locking rod which is horizontally arranged is fixed at the top end of the traction pin, and the axial direction of the traction pin locking rod is perpendicular to the traction advancing direction; the top end of the base is further sequentially and fixedly provided with an anti-disengaging lock rod and a hinge seat in the traction advancing direction. The traction pin lock rod and a rotating shaft on the hinge seat are both parallel to the anti-disengaging lock rod. The hinging seat is rotationally connected with a supporting plate through a rotating shaft, and the traction pin locking rod correspondingly penetrates through the traction pin locking rod through hole and is arranged above the supporting plate; the anti-falling lock rod correspondingly penetrates through the anti-falling lock rod through hole and is arranged above the supporting plate; a traction pin lock hook installation base corresponding to the traction pin lock rod and an anti-disengaging lock hook installation base corresponding to the anti-disengaging lock rod are fixed to the upper portion of the top face of the supporting plate, and a traction pin lock hook matched with the traction pin lock rod is rotationally connected to the traction pin lock hook installation base. And the anti-falling lock hook mounting seat is rotationally connected with an anti-falling lock hook matched with the anti-falling lock rod.

Description

Technical Field

[0001] The invention relates to the technical field of towing equipment, and in particular to a mechanical self-locking anti-falling towing locking device. Background Art

[0002] With the rapid development of the aviation industry and the increase in the number of flights, the passenger throughput is large, and the use of apron towing equipment such as trailer towing equipment, support trailer towing equipment, and vehicle accessory trailer towing equipment has also increased significantly. In particular, the baggage transporter is a frequently used trailer towing equipment. It is mainly used for the transportation of luggage and cargo. It can deliver passengers' checked luggage and cargo to passenger planes. It can handle large amounts of luggage and cargo efficiently, quickly and reliably, reduce the burden on passengers, and improve travel comfort. In addition, the luggage transporter can also improve the operating efficiency of the airport, reduce luggage handling time, and improve passenger satisfaction.

[0003] The luggage transport vehicle comprises a luggage tractor and a multi-section trailer connected to the rear thereof. The rear end of the front trailer is rotatably connected to a traction bracket, on which a traction ring is fixed, and the front end of the rear trailer is fixed to a base, which is connected to the traction ring by a traction pin. When the luggage transport vehicle is bumpy during transportation, the traction pin is prone to jump, jump up, or even detach from the traction seat, posing a safety hazard of the pin coming off. Once the traction pin falls off, the corresponding trailer will lose control, and the trailer will deviate from its route under the action of its own inertia, which is very likely to cause unsafe incidents such as collisions with aircraft, vehicles, and personnel, resulting in serious economic losses. Summary of the invention

[0004] The purpose of the present invention is to provide a mechanical self-locking anti-falling traction locking device.

[0005] The present invention is implemented by the following technical solutions: a mechanical self-locking anti-falling traction locking device, which includes a base, a support plate, and a traction pin;

[0006] The traction pin is vertically fixed on the base, and a horizontally arranged traction pin locking rod is fixed on the top of the traction pin, and the axial direction of the traction pin locking rod is perpendicular to the traction travel direction;

[0007] The top of the base is also fixed with an anti-dropout locking rod and an articulated seat in sequence along the traction direction, and the traction pin locking rod and the rotating shaft on the articulated seat are both arranged parallel to the anti-dropout locking rod;

[0008] The hinge seat is rotatably connected to the support plate via the rotating shaft, and a traction pin lock rod through hole and an anti-drop lock rod through hole matching the traction pin lock rod and the anti-drop lock rod are respectively provided on the support plate, and the traction pin lock rod passes through the traction pin lock rod through hole and is placed above the support plate; the anti-drop lock rod passes through the anti-drop lock rod through hole and is placed above the support plate;

[0009] Above the top surface of the support plate, a hitch pin lock hook mounting seat corresponding to the hitch pin lock rod and an anti-disengagement lock hook mounting seat corresponding to the anti-disengagement lock rod are fixedly installed. A hitch pin lock hook, which is rotatably connected to the hitch pin lock hook mounting seat and is arranged in cooperation with the hitch pin lock rod, and an anti-disengagement lock hook, which is rotatably connected to the anti-disengagement lock hook mounting seat and is arranged in cooperation with the anti-disengagement lock rod, are provided.

[0010] Furthermore, the hitch pin lock hook mounting seat and the anti-disengagement lock hook mounting seat with the same structure both include two parallel vertical plates, which are vertically fixed above the top surface of the support plate. A hook rotating shaft parallel to the hitch pin lock rod is arranged between the two parallel vertical plates. The hitch pin lock hook and the anti-disengagement lock hook are respectively rotatably arranged on the hook rotating shafts of the hitch pin lock hook mounting seat and the anti-disengagement lock hook mounting seat.

[0011] Furthermore, a hook disengaging and engaging device is arranged between the hitch pin lock hook mounting seat and the anti-disengagement lock hook mounting seat.

[0012] Furthermore, the hook disengaging and engaging device includes a bottom plate. The hitch pin lock hook and the anti-disengagement lock hook have the same structure. The hitch pin lock hook is T-shaped. One end of the horizontal bar of the T shape is rotatably connected to the hitch pin lock hook mounting seat. A hook portion, which is arranged in cooperation with the hitch pin lock rod, is fixed at the end of the vertical bar of the T shape. The other end of the horizontal bar of the T shape is movably abutted against the top surface of the bottom plate.

[0013] Furthermore, limiting and guiding grooves for the bottom plate are respectively formed on the side walls of the opposite vertical plates of the hitch pin lock hook mounting seat and the anti-disengagement lock hook mounting seat. Both sides of the bottom plate are respectively arranged in cooperation with the corresponding limiting and guiding grooves. The limiting and guiding grooves are composed of a plurality of arc-shaped grooves arranged vertically; the arc-shaped grooves between the two relatively arranged limiting and guiding grooves are arranged in a staggered manner.

[0014] Furthermore, a lifting device for the bottom plate is arranged between the hitch pin lock hook mounting seat and the anti-disengagement lock hook mounting seat. The lifting device includes a top cover and a connecting member. The top cover is movably covered between the tops of the hitch pin lock hook mounting seat and the anti-disengagement lock hook mounting seat. A connecting member is fixed at the bottom end of the top cover. The bottom end of the connecting member is slidably connected to the bottom plate along the traction traveling direction.

[0015] Furthermore, a hook limiting baffle is fixed on the connecting member. The bottom end of the hook limiting baffle is respectively movably abutted against the top of the end of the horizontal bar of the hitch pin lock hook and the end of the horizontal bar of the anti-disengagement lock hook away from the hook rotating shaft.

[0016] Further, it further includes a protective cover. The outside of the towing pin hook mounting seat and the anti-disengagement hook mounting seat is covered with the protective cover. The bottom end of the protective cover is fixedly connected to the top end of the support plate, and the top end of the protective cover is movably covered with the top cover.

[0017] Further, the connecting member includes a connecting plate and two vertically arranged vertical plates. The connecting plate is fixed between the top ends of the vertical plates. The bottom ends of the two vertical plates are slidably connected to the sliding member of the bottom plate along the towing direction. And the two side walls of the vertical plates are in movable contact with the limiting and guiding grooves. A through opening is formed at the top of the protective cover. The connecting plate extends to the outside of the protective cover through the through opening and is fixedly connected to the top cover.

[0018] Further, the sliding member includes a fixing plate. A chute is formed on the fixing plate along the towing direction. A slider is slidably connected in the chute. The slider is fixedly connected to the bottom of the vertical plate.

[0019] Further, a horizontally arranged limiting plate is fixedly connected between the outer walls of the tops of the towing pin hook mounting seat and the anti-disengagement hook mounting seat. The limiting plate is in movable abutment with the sliding member.

[0020] Further, the connecting member includes a vertically arranged connecting rod. The connecting rod is arranged between the towing pin hook and the anti-disengagement hook. And the bottom end of the connecting rod is slidably connected to the top end of the bottom plate along the towing direction. A guiding sleeve opposite to the connecting rod is fixedly connected to the inner wall of the top end of the protective cover. The top end of the connecting rod passes through the guiding sleeve and extends to the outside of the protective cover and is fixedly connected to the top cover.

[0021] Further, it further includes a triggering device. The triggering device includes a triggering block, a lever, a connecting seat, and a push rod. The connecting seat is fixed in the base. The lever is rotatably connected to the connecting seat. The triggering block is fixed to one end of the lever. A triggering block outlet corresponding to the triggering block is formed on the top wall of the base. The other end of the lever is hinged with the push rod. The push rod is arranged on the side of the hinge seat away from the anti-disengagement lock rod. A push rod outlet corresponding to the push rod is formed on the top wall of the base. The top end of the push rod passes through the push rod outlet and is in movable abutment with the support plate. A push block is fixed to one end of the support plate close to the hinge seat. The push block is in movable abutment with the push rod.

[0022] Advantages of the present invention: The towing ring is sleeved on the towing pin, and the towing ring is automatically locked through the triggering device. The operation is simple, and the locking of the towing ring can be completed only in one step, solving the problem that the operator forgets to lock the towing pin.

[0023] The draw pin is directly fixed on the base with high stability. When cooperating with the draw ring, the draw ring is sleeved on the draw pin and is not easily detached, achieving the first-stage locking of the draw ring. When the luggage transporter fluctuates back and forth during traveling or braking, under the action of the draw pin locking hook, anti-disengagement locking hook, draw pin locking rod, and anti-disengagement locking rod, the draw ring is limited on the draw pin, achieving the second-stage locking of the draw ring. Under the action of the bottom plate and the limit guiding groove, the up-and-down movement of the bottom plate is limited. The bottom plate can only move upward with the help of external force in a certain direction, so that when the luggage transporter bumps up and down during transportation, the bottom plate will not fluctuate up and down, ensuring the stable position of the bottom plate, and thus ensuring the stable positions of the draw pin locking hook and the anti-disengagement locking hook, reducing the risk of the draw pin locking hook detaching from the draw pin locking rod and the anti-disengagement locking hook detaching from the anti-disengagement locking rod, further reducing the risk of the draw ring detaching from the draw pin, and achieving the third-stage locking of the draw ring. By using the locking hook limit baffle to limit the rotation of the draw pin locking hook and the anti-disengagement locking hook, when there is an up-and-down bump, the problem of hook detachment caused by the rotation of the draw pin locking hook and the anti-disengagement locking hook is effectively reduced, achieving the fourth-stage locking of the draw ring. Through the above four-stage locking of the draw ring, during the driving of the luggage transporter, the firmness of the connection between the trailers is ensured, and the incidence of airport ground safety accidents caused by trailer disconnection is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0025] Figure 1 It is a schematic diagram of the partial structure of the base of the invention;

[0026] Figure 2 It is a schematic diagram of the structure of the draw pin locking hook of the invention;

[0027] Figure 3 It is a schematic diagram of the overall structure of Embodiment 1;

[0028] Figure 4 It is a sectional view of the overall structure of Embodiment 1;

[0029] Figure 5 It is a partial perspective view of Embodiment 1;

[0030] Figure 6 It is a schematic diagram of the lifting device in the lifted state of Embodiment 1;

[0031] Figure 7 It is a schematic diagram of the opened state of Embodiment 1;

[0032] Figure 8 Schematic diagram of the connection between the bottom plate and the connecting member in Embodiment 1 Figure One ;

[0033] Figure 9 Schematic diagram of the connection between the bottom plate and the connecting member in Embodiment 1 Figure Two ;

[0034] Figure 10 Schematic diagram of the overall structure of Embodiment 2;

[0035] Figure 11 Schematic diagram of the lifting state of the lifting device in Embodiment 2;

[0036] Figure 12 Partial perspective view of Embodiment 2;

[0037] In the figure: base 1, towing pin 2, reinforcing plate 3, towing pin locking rod 4, anti - detachment locking rod 5, hinge seat 6, rotating shaft 7, support plate 8, through - hole of towing pin locking rod 9, through - hole of anti - detachment locking rod 10, mounting seat of towing pin locking hook 11, vertical plate 11.1, locking hook rotating shaft 11.2, mounting seat of anti - detachment locking hook 12, towing pin locking hook 13, cross bar 13.1, vertical bar 13.2, hook part 13.3, anti - detachment locking hook 14, locking hook detaching and attaching device 15, bottom plate 15.1, limit guiding groove 16, arc - shaped groove 16.1, lifting device 17, top cover 17.1, connecting member 17.2, connecting plate 17.21, vertical plate 17.22, connecting rod 17.23, locking hook limit baffle 18, protective outer cover 19, sliding member 20, fixing plate 20.1, sliding groove 20.2, sliding block 20.3, through - port 21, limit plate 22, triggering device 23, triggering block 23.1, lever 23.2, connecting seat 23.3, ejector rod 23.4, triggering block outlet 24, ejector rod outlet 25, pushing block 26, guiding sleeve 27. Detailed implementation manners

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0039] Embodiment 1:

[0040] As Figures 1-9 shown, a mechanical self - locking anti - detachment traction locking device, which includes a base 1, a support plate 8, and a towing pin 2;

[0041] A draw pin 2 is vertically fixed on a base 1. Specifically, the bottom end of the draw pin 2 penetrates through the top wall of the base 1 and is fixedly connected to the inner wall of the bottom end of the base 1 through a reinforcing plate 3, which increases the firmness and strength of the draw pin 2 and has a strengthening effect. A horizontally arranged draw pin lock rod 4 is fixed to the top end of the draw pin 2, and the axis of the draw pin lock rod 4 is perpendicular to the traction traveling direction. The function of the draw pin 2 is to connect the traction ring of the front trailer under the cooperation of the base 1. Compared with the pluggable draw pin 2 in the prior art, the draw pin 2 fixed on the base 1 has higher stability, realizes the first-stage locking function of the traction ring, and provides the firmness of the connection between the trailers.

[0042] A horizontally arranged draw pin lock rod 4 is fixed to the top end of the draw pin 2, and the axis of the draw pin lock rod 4 is perpendicular to the traction traveling direction. An anti-disengagement lock rod 5 and a hinge seat 6 are sequentially fixed to the top end of the base 1 along the traction traveling direction. The draw pin lock rod 4 and the rotating shaft 7 on the hinge seat 6 are both parallel to the anti-disengagement lock rod 5.

[0043] The hinge seat 6 is rotatably connected to a support plate 8 through a rotating shaft 7. At the same time, the top end face of the draw pin 2 is movably abutted against the bottom end face of the support plate 8, which has a supporting and limiting effect on the support plate 8. A draw pin lock rod through hole 9 and an anti-disengagement lock rod through hole 10 matching the draw pin lock rod 4 and the anti-disengagement lock rod 5 are respectively formed on the support plate 8. The draw pin lock rod 4 correspondingly passes through the draw pin lock rod through hole 9 and is placed above the support plate 8. The anti-disengagement lock rod 5 correspondingly passes through the anti-disengagement lock rod through hole 10 and is placed above the support plate 8.

[0044] Above the top surface of the support plate 8, a draw pin lock hook mounting seat 11 corresponding to the draw pin lock rod 4 and an anti-disengagement lock hook mounting seat 12 corresponding to the anti-disengagement lock rod 5 are fixed. A draw pin lock hook 13 cooperating with the draw pin lock rod 4 is rotatably connected to the draw pin lock hook mounting seat 11, and an anti-disengagement lock hook 14 cooperating with the anti-disengagement lock rod 5 is rotatably connected to the anti-disengagement lock hook mounting seat 12.

[0045] After the first - stage locking of the towing ring by the towing pin 2, with the cooperation of the towing - pin locking hook 13, the anti - detachment locking hook 14, the towing - pin locking rod 4, and the anti - detachment locking rod 5, the movement range of the towing ring is limited. Further, the towing ring is restricted on the towing pin 2. Under the action of the towing - pin locking hook 13 and the anti - detachment locking hook 14 arranged along the towing direction, when the trailer jolts back and forth and generates a force along the towing direction on the base 1, the towing - pin locking hook 13 plays a role and rotates towards the side of the towing - pin locking rod 4, firmly hooking the towing - pin locking rod 4. At the same time, with the cooperation of the bottom plate 15.1 and the limit guiding groove 16, the anti - detachment locking hook 14 is further limited to ensure that it does not disengage from the anti - detachment locking hook 14. When a force in the opposite direction of the towing direction is generated, the anti - detachment locking hook 14 plays a role and rotates towards the side of the anti - detachment locking rod 5, firmly hooking the anti - detachment locking rod 5. Through the mutual cooperation of the towing - pin locking hook 13 and the anti - detachment locking hook 14, when there is a front - to - back displacement between two adjacent trailers during the movement of the luggage transport vehicle, the second - stage locking of the towing ring is achieved.

[0046] The towing - pin locking - hook mounting seat 11 and the anti - detachment locking - hook mounting seat 12 with the same structure both include two parallel vertical plates 11.1. The vertical plates 11.1 are vertically fixed above the top surface of the support plate 8. Between the two parallel vertical plates 11.1, there is a locking - hook rotating shaft 11.2 parallel to the towing - pin locking rod 4. The towing - pin locking hook 13 and the anti - detachment locking hook 14 are correspondingly rotatably arranged on the locking - hook rotating shaft 11.2 of the towing - pin locking - hook mounting seat 11 and the anti - detachment locking - hook mounting seat 12.

[0047] There is a locking - hook disengaging device 15 between the towing - pin locking - hook mounting seat 11 and the anti - detachment locking - hook mounting seat 12. Through the locking - hook disengaging device 15, the towing - pin locking hook 13 is disengaged from the towing - pin locking rod 4, and the anti - detachment locking hook 14 is disengaged from the anti - detachment locking rod 5, unlocking the towing ring from the towing pin 2, which is convenient for connecting and disassembling the trailers on the luggage transport vehicle or for maintenance work.

[0048] The locking - hook disengaging device 15 includes a bottom plate 15.1. The towing - pin locking hook 13 and the anti - detachment locking hook 14 have the same structure. Among them, the towing - pin locking hook 13 is T - shaped. One end of the horizontal bar 13.1 of the T - shape is rotatably connected to the towing - pin locking - hook mounting seat 11. At the end of the vertical bar 13.2 of the T - shape, there is a hook portion 13.3 arranged in cooperation with the towing - pin locking rod 4. The other end of the horizontal bar 13.1 of the T - shape is in movable contact with the top surface of the bottom plate 15.1. When locking the towing ring, under the action of its own gravity, the bottom plate 15.1 contacts the top surface of the support plate 8. When it is necessary to unlock the towing ring, the bottom plate 15.1 needs to move upward. By moving the bottom plate 15.1 up and down, the towing - pin locking hook 13 and the anti - detachment locking hook 14 are driven to rotate. After the towing - pin locking hook 13 and the anti - detachment locking hook 14 rotate, they are automatically disengaged from the towing - pin locking rod 4 and the anti - detachment locking rod 5.

[0049] The side walls of the relative standing plates 11.1 of the traction pin lock hook mounting seat 11 and the anti-drop lock hook mounting seat 12 are respectively provided with limiting guide grooves 16 of the bottom plate 15.1, and the two sides of the bottom plate 15.1 are respectively provided with corresponding limiting guide grooves 16, and the limiting guide grooves 16 are composed of a plurality of arc grooves 16.1 arranged in the vertical direction; the arc grooves 16.1 between the two relatively arranged limiting guide grooves 16 are staggered, and the function of setting the limiting guide grooves 16 is to limit the up and down movement of the bottom plate 15.1, and the bottom plate 15.1 moves upward. The movement can only be achieved with the help of external force in a certain direction. When the luggage transport vehicle bumps up and down during transportation, the bottom plate 15.1 will not fluctuate up and down with the cooperation of the bottom plate 15.1 and the limiting guide groove 16, thereby ensuring the stability of the bottom plate 15.1, and thus ensuring the stability of the positions of the traction pin lock hook 13 and the anti-detachment lock hook 14, reducing the risk of the traction pin lock hook 13 being separated from the traction pin lock rod 4 and the anti-detachment lock hook 14 being separated from the anti-detachment lock rod 5, further reducing the risk of the traction ring being separated from the traction pin 2, and realizing the third-level locking of the traction ring.

[0050] A lifting device 17 of the base plate 15.1 is provided between the traction pin lock hook mounting seat 11 and the anti-detachment lock hook mounting seat 12. The function of the lifting device 17 is to achieve up and down traction on the base plate 15.1, so as to facilitate the up and down movement of the base plate 15.1, so as to achieve the detachment of the traction pin lock hook 13 from the traction pin lock rod 4 and the detachment of the anti-detachment lock hook 14 from the anti-detachment lock rod 5. The lifting device 17 includes a top cover 17.1 and a connecting piece 17.2. The movable cover of the top cover 17.1 is provided between the top ends of the traction pin lock hook mounting seat 11 and the anti-detachment lock hook mounting seat 12. The bottom end of the top cover 17.1 is fixed with a connecting piece 17.2, and the bottom end of the connecting piece 17.2 is slidably connected to the base plate 15.1 along the traction direction.

[0051] A lock hook limiting baffle 18 is fixed on the connecting piece 17.2, and the bottom end of the lock hook limiting baffle 18 is movably abutted with the top of the cross bar 13.1 of the traction pin lock hook 13 and the cross bar 13.1 of the anti-detachment lock hook 14 away from the lock hook rotating shaft 11.2 respectively. The function of the lock hook limiting baffle 18 is that in the process of transportation of the luggage conveyor, under the action of the limiting guide groove 16 and the bottom plate 15.1, when up and down bumps occur, the rotation of the traction pin lock hook 13 and the anti-detachment lock hook 14 is further limited by the lock hook limiting baffle 18, which effectively reduces the unhooking problem caused by the rotation of the traction pin lock hook 13 and the anti-detachment lock hook 14, and realizes the fourth level locking of the traction ring. At the same time, when the traction pin lock hook 13 and the anti-detachment lock hook 14 are detached and hung later, the lock hook limiting baffle 18 moves together with the bottom plate 15.1, and does not interfere with the detachment and hanging operation of the traction pin lock hook 13 and the anti-detachment lock hook 14.

[0052] It further includes a protective cover 19. The outside of the towing pin hook mounting seat 11 and the anti-disengagement hook mounting seat 12 is provided with the protective cover 19. The bottom end of the protective cover 19 is fixedly connected to the top end of the support plate 8, and the top end of the protective cover 19 is movably covered with a top cover 17.1. The cooperation of the protective cover 19 and the top cover 17.1 has the functions of dust prevention and waterproofing, and extends the service life of its internal parts.

[0053] The connecting member 17.2 includes a connecting plate 17.21 and two vertically arranged vertical plates 17.22 which are arranged in parallel. A connecting plate 17.21 is fixed between the top ends of the vertical plates 17.22. The bottom ends of the two vertical plates 17.22 are slidably connected to the sliding member 20 of the bottom plate 15.1 along the towing traveling direction, and the two side walls of the vertical plates 17.22 are in movable contact with the limiting guide groove 16.

[0054] When the two vertical plates 17.22 move up and down, they can be in movable contact with the limiting guide groove 16 and have a guiding effect. During the process of lifting the top cover 17.1, under the cooperation of the vertical plates 17.22 and the arc-shaped groove 16.1 of the limiting guide groove 16, the bottom plate 15.1 slides left and right relative to the vertical plates 17.22 and then moves upward. The two relatively arranged limiting guide grooves 16 form a moving channel for the bottom plate 15.1. When an external force in the vertical up and down direction is applied, the bottom plate 15.1 can be lifted upward. A through hole 21 is opened at the top of the protective cover 19. The connecting plate 17.21 extends to the outside of the protective cover 19 through the through hole 21 and is fixedly connected to the top cover 17.1. With the cooperation of the top cover 17.1, it is convenient to grasp the connecting member 17.2, and then the lifting operation of the bottom plate 15.1 can be realized.

[0055] The sliding member 20 includes a fixing plate 20.1. A sliding groove 20.2 arranged along the towing traveling direction is opened on the fixing plate 20.1. A sliding block 20.3 is slidably connected in the sliding groove 20.2, and the sliding block 20.3 is fixedly connected to the bottom of the vertical plate 17.22.

[0056] A horizontally arranged limiting plate 22 is fixedly connected between the top outer walls of the towing pin hook mounting seat 11 and the anti-disengagement hook mounting seat 12. The limiting plate 22 is in movable abutment with the sliding member 20. The function of the limiting plate 22 is to limit the hook disengaging and engaging device 15. When disengaging and engaging the towing pin hook 13 and the anti-disengagement hook 14, the bottom plate 15.1 of the hook disengaging and engaging device 15 can be effectively limited between the towing pin hook mounting seat 11 and the anti-disengagement hook mounting seat 12.

[0057] It further includes a triggering device 23, which includes a triggering block 23.1, a lever 23.2, a connecting seat 23.3, and a ejector rod 23.4. The connecting seat 23.3 is fixed inside the base 1. The lever 23.2 is rotatably connected to the connecting seat 23.3. One end of the lever 23.2 is fixed with the triggering block 23.1. A triggering block outlet 24 corresponding to the triggering block 23.1 is provided on the top wall of the base 1. The other end of the lever 23.2 is hinged with the ejector rod 23.4. The ejector rod 23.4 is placed on the side of the hinge seat 6 away from the anti-disengagement locking rod 5. A ejector rod outlet 25 corresponding to the ejector rod 23.4 is provided on the top wall of the base 1. The top end of the ejector rod 23.4 passes through the ejector rod outlet 25 and is in movable abutment with the support plate 8. A push block 26 is fixed at one end of the support plate 8 close to the hinge seat 6. The push block 26 is in movable abutment with the ejector rod 23.4.

[0058] After the traction ring is sleeved on the traction pin 2, due to the weight of the traction ring and the traction bracket of the traction frame itself, the triggering block 23.1 is pressed down. Under the action of the lever 23.2, the triggering block 23.1 drives the ejector rod 23.4 to move upward until the ejector rod 23.4 contacts the push block 26, pushing the push block 26, and then pushing the support plate 8 to rotate downward until the support plate 8 is buckled on the traction pin locking rod 4 and the anti-disengagement locking rod 5. At this time, under the action of the self-weight of the traction pin locking hook 13 and the anti-disengagement locking hook 14, they are hooked on the traction pin locking rod 4 and the anti-disengagement locking rod 5, realizing the locking operation of the traction ring. Only by sleeving the traction ring on the traction pin 2, the triggering device 23 automatically locks the traction ring. The operation is simple and only one step is required to complete the locking of the traction ring, solving the problem that the operator forgets to lock the traction pin 2.

[0059] The specific operation process of this embodiment:

[0060] Under the initial adjustment, the device is in an unlocked state. The support plate 8 is away from the traction pin locking rod 4 and the anti-disengagement locking rod 5. At the same time, under the action of the top cover 17.1 and the vertical plate 17.22 of the lifting device 17, the bottom plate 15.1 is driven to move away from the support plate 8. At this time, the traction pin locking hook 13 and the anti-disengagement locking hook 14 approach each other under the action of the bottom plate 15.1.

[0061] When the towing ring needs to be locked, when the towing ring is sleeved on the towing pin 2, under the action of its own gravity, the towing ring presses down the trigger block 23.1, so that the trigger block 23.1 drives the ejector rod 23.4 to move upward under the action of the lever 23.2 until the ejector rod 23.4 contacts the push block 26, pushing the push block 26, and then pushing the support plate 8 to rotate downward until the support plate 8 is buckled on the towing pin locking rod 4 and the anti-disengagement locking rod 5. At this time, the bottom plate 15.1 contacts the top surface of the support plate 8 under the action of gravity, and the towing pin locking hook 13 and the anti-disengagement locking hook 14 are hooked on the towing pin locking rod 4 and the anti-disengagement locking rod 5 under the action of the bottom plate 15.1 and their own weights, limiting the towing ring on the towing pin 2 to realize the locking operation of the towing ring;

[0062] When the towing ring needs to be unlocked in the locked state of the device, it is necessary to lift the top cover 17.1 of the lifting device 17. The top cover 17.1 drives the vertical plate 17.22 to move upward, and the vertical plate 17.22 drives the bottom plate 15.1 to gradually move upward along the limit guiding groove 16 until the towing pin locking hook 13 is disengaged from the towing pin locking rod 4 and the anti-disengagement locking hook 14 is disengaged from the anti-disengagement locking rod 5 under the action of the bottom plate 15.1. At this time, under the action of the lifting device 17, the support plate 8 is driven to rotate away from the base 1 along the hinge seat 6, and the towing ring can be removed from the towing pin 2.

[0063] Embodiment 2:

[0064] As Figure 1 、 Figure 2 、 Figures 10-12 shown, the mechanical self-locking anti-detachment towing locking device is different from that of Embodiment 1 in that the connecting member 17.2 includes a vertically arranged connecting rod 17.23. The connecting rod 17.23 is placed between the towing pin locking hook 13 and the anti-disengagement locking hook 14, and the bottom end of the connecting rod 17.23 is slidably connected to the top end of the bottom plate 15.1 along the towing direction. The specific sliding connection method is that a sliding groove 20.2 arranged along the towing direction is opened at the top end of the bottom plate 15.1 and is slidably connected to the slider at the bottom end of the connecting rod 17.23. A guiding sleeve 27 opposite to the connecting rod 17.23 is fixed on the inner wall of the top end of the protective outer cover 19. The top end of the connecting rod 17.23 passes through the guiding sleeve 27 and extends to the outside of the protective outer cover 19 and is fixedly connected to the top cover 17.1. The guiding sleeve 27 limits the moving direction of the connecting rod 17.23. At the same time, when the bottom plate 15.1 is lifted upward through the connecting rod 17.23, the guiding sleeve 27 limits the locking hook disengaging device 15, and can effectively limit the bottom plate 15.1 of the locking hook disengaging device 15 between the towing pin locking hook mounting seat 11 and the anti-disengagement locking hook mounting seat 12.

[0065] The specific operation process of this embodiment:

[0066] Under the initial condition, the device is in an unlocked state. The support plate 8 is far away from the towing pin lock rod 4 and the anti-disengagement lock rod 5. At the same time, under the action of the top cover 17.1 of the lifting device 17 and the connecting rod 17.23, the bottom plate 15.1 is driven to move away from the support plate 8. At this time, the towing pin lock hook 13 and the anti-disengagement lock hook 14 approach each other under the action of the bottom plate 15.1.

[0067] When the towing ring is sleeved on the towing pin 2, under the action of its own gravity, the towing ring presses down the trigger block 23.1, so that the trigger block 23.1 drives the ejector rod 23.4 to move upward under the action of the lever 23.2 until the ejector rod 23.4 contacts the push block 26 and pushes the push block 26, and then pushes the support plate 8 to rotate downward until the support plate 8 is buckled on the towing pin lock rod 4 and the anti-disengagement lock rod 5. At this time, under the action of gravity, the bottom plate 15.1 moves downward and contacts the top surface of the support plate 8. The towing pin lock hook 13 and the anti-disengagement lock hook 14 are hooked on the towing pin lock rod 4 and the anti-disengagement lock rod 5 under the action of the bottom plate 15.1 and their own weights, restricting the towing ring on the towing pin 2 to achieve the locking operation of the towing ring.

[0068] When the device is in the locked state and the towing ring needs to be unlocked, the top cover 17.1 of the lifting device 17 needs to be lifted upward. The top cover 17.1 drives the connecting rod 17.23 to move upward. The connecting rod 17.23 moves vertically upward along the guiding sleeve 27, driving the bottom plate 15.1 to gradually move upward along the limit guiding groove 16 until the towing pin lock hook 13 is disengaged from the towing pin lock rod 4 and the anti-disengagement lock hook 14 is disengaged from the anti-disengagement lock rod 5 under the action of the bottom plate 15.1. At this time, under the action of the lifting device 17, the support plate 8 is continuously driven to rotate away from the base 1 along the hinge seat 6, and the towing ring can be removed from the towing pin 2.

[0069] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A mechanical self-locking anti-drop traction locking device, characterized in that, It includes a base, a support plate, and a draw pin; The draw pin is vertically fixed on the base, and a horizontally arranged draw pin locking rod is fixed at the top end of the draw pin. The axial direction of the draw pin locking rod is perpendicular to the traction traveling direction; An anti - detachment locking rod and a hinge seat are sequentially fixed on the top end of the base along the traction traveling direction. The draw pin locking rod and the rotating shaft on the hinge seat are both parallel to the anti - detachment locking rod; The hinge seat is rotatably connected to the support plate through the rotating shaft. The support plate is respectively provided with a draw pin locking rod through - hole and an anti - detachment locking rod through - hole that match the draw pin locking rod and the anti - detachment locking rod. The draw pin locking rod correspondingly passes through the draw pin locking rod through - hole and is placed above the support plate; the anti - detachment locking rod correspondingly passes through the anti - detachment locking rod through - hole and is placed above the support plate; Above the top surface of the support plate, a draw pin locking hook mounting seat corresponding to the draw pin locking rod and an anti - detachment locking hook mounting seat corresponding to the anti - detachment locking rod are fixed. A draw pin locking hook that cooperates with the draw pin locking rod is rotatably connected to the draw pin locking hook mounting seat, and an anti - detachment locking hook that cooperates with the anti - detachment locking rod is rotatably connected to the anti - detachment locking hook mounting seat.

2. The mechanical self-locking anti-drop traction locking device according to claim 1, wherein The draw pin locking hook mounting seat and the anti - detachment locking hook mounting seat with the same structure both include two parallel vertical plates. The vertical plates are vertically fixed above the top surface of the support plate. A hook rotating shaft parallel to the draw pin locking rod is arranged between the two parallel vertical plates. The draw pin locking hook and the anti - detachment locking hook are correspondingly rotatably arranged on the hook rotating shafts of the draw pin locking hook mounting seat and the anti - detachment locking hook mounting seat.

3. The mechanical self-locking anti-drop traction locking device according to claim 2, characterized in that, A hook detaching and attaching device is arranged between the draw pin locking hook mounting seat and the anti - detachment locking hook mounting seat.

4. The mechanical self-locking anti-drop traction locking device according to claim 3, characterized in that, The hook detaching and attaching device includes a bottom plate. The draw pin locking hook and the anti - detachment locking hook have the same structure. The draw pin locking hook is T - shaped. One end of the horizontal bar of the T - shape is rotatably connected to the draw pin locking hook mounting seat, and a hook portion that cooperates with the draw pin locking rod is fixed at the end of the vertical bar of the T - shape. The other end of the horizontal bar of the T - shape is movably abutted against the top surface of the bottom plate.

5. The mechanical self-locking anti-drop traction locking device according to claim 4, characterized in that, Limiting and guiding grooves for the bottom plate are respectively opened on the side walls of the opposite vertical plates of the draw pin locking hook mounting seat and the anti - detachment locking hook mounting seat. The two sides of the bottom plate are respectively arranged in cooperation with the corresponding limiting and guiding grooves. The limiting and guiding grooves are composed of a plurality of arc - shaped grooves arranged vertically; the arc - shaped grooves between the two relatively arranged limiting and guiding grooves are arranged in a staggered manner.

6. The mechanical self-locking anti-drop traction locking device according to claim 5, wherein A lifting device for the bottom plate is arranged between the draw pin locking hook mounting seat and the anti - detachment locking hook mounting seat. The lifting device includes a top cover and a connecting piece. The top cover is movably covered between the top ends of the draw pin locking hook mounting seat and the anti - detachment locking hook mounting seat. A connecting piece is fixed at the bottom end of the top cover, and the bottom end of the connecting piece is slidably connected to the bottom plate along the traction traveling direction.

7. The mechanical self-locking anti-drop traction locking device according to claim 6, wherein, A hook limiting baffle is fixed on the connecting piece. The bottom end of the hook limiting baffle is respectively movably abutted against the top of the horizontal bar of the draw pin locking hook and the horizontal bar of the anti - detachment locking hook away from the hook rotating shaft.

8. The mechanical self-locking anti-drop traction locking device according to claim 7, characterized in that, It further includes a protective cover. The outside of the towing pin hook mounting seat and the anti-disengagement hook mounting seat is covered with the protective cover. The bottom end of the protective cover is fixedly connected to the top end of the support plate, and the top end of the protective cover is movably covered with the top cover.

9. The mechanical self-locking anti-drop traction locking device according to claim 8, characterized in that, The connecting member includes a connecting plate and two vertically arranged vertical plates. The connecting plate is fixed between the top ends of the vertical plates. The bottom ends of the two vertical plates are slidably connected to the sliding member of the bottom plate along the towing direction. And the two side walls of the vertical plates are in movable contact with the limiting and guiding grooves. A through opening is formed at the top of the protective cover. The connecting plate extends to the outside of the protective cover through the through opening and is fixedly connected to the top cover.

10. The mechanical self-locking anti-drop traction locking device according to claim 9, characterized in that, The sliding member includes a fixing plate. A chute is formed in the fixing plate along the towing direction. A slider is slidably connected in the chute. The slider is fixedly connected to the bottom of the vertical plate.

11. The mechanical self-locking anti-drop traction locking device according to claim 10, characterized in that, A horizontally arranged limiting plate is fixedly connected between the outer walls of the tops of the towing pin hook mounting seat and the anti-disengagement hook mounting seat. The limiting plate is in movable abutment with the sliding member.

12. The mechanical self-locking anti-drop traction locking device according to claim 8, wherein The connecting member includes a vertically arranged connecting rod. The connecting rod is arranged between the towing pin hook and the anti-disengagement hook. And the bottom end of the connecting rod is slidably connected to the top end of the bottom plate along the towing direction. A guiding sleeve opposite to the connecting rod is fixedly connected to the inner wall of the top end of the protective cover. The top end of the connecting rod passes through the guiding sleeve and extends to the outside of the protective cover and is fixedly connected to the top cover.

13. The mechanical self-locking anti-drop traction locking device according to any one of claims 1 to 12, characterized in that, It further includes a triggering device. The triggering device includes a triggering block, a lever, a connecting seat, and a push rod. The connecting seat is fixed in the base. The lever is rotatably connected to the connecting seat. The triggering block is fixed to one end of the lever. A triggering block outlet corresponding to the triggering block is formed in the top wall of the base. The other end of the lever is hinged with the push rod. The push rod is arranged on the side of the hinge seat away from the anti-disengagement lock rod. A push rod outlet corresponding to the push rod is formed in the top wall of the base. The top end of the push rod passes through the push rod outlet and is in movable abutment with the support plate. A push block is fixed to one end of the support plate close to the hinge seat. The push block is in movable abutment with the push rod.

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