Locking mechanism of concave underframe and piggyback transport vehicle

Abstract

The utility model relates to a locking mechanism of a concave chassis and a piggyback transport vehicle, the piggyback transport vehicle comprises the concave chassis, the locking mechanism of the concave chassis comprises a driving part and two locking parts, and each locking part comprises a lock hook; the driving part comprises a driving shaft, screw rods are arranged at the ends of the two sides of the driving shaft respectively, the thread directions of the two screw rods are opposite, the two screw rods are in threaded connection with nuts respectively, the two nuts are correspondingly connected with the two locking parts respectively, and the nuts can move in the axial direction of the driving shaft and drive the lock hook to lock or unlock the concave underframe. According to the locking mechanism of the concave underframe, the concave underframe can be locked and unlocked conveniently and quickly, the stability of the concave underframe in the transportation process is guaranteed, and then the safety of goods in a vehicle and the driving safety are guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of railway freight transport, and in particular to a locking mechanism of a recessed chassis and a piggyback transport vehicle. Background Art

[0002] The concave frame of the piggyback transport vehicle can take the middle bogie center plate as the center and complete the lifting and rotating functions through its own mechanism. After rotation, the concave frame can adapt to the operation requirements of the semi-trailer to go up and down by itself.

[0003] However, during the transportation of the vehicle, the undercarriage needs to remain stable to avoid lateral rotation and longitudinal and vertical movement to ensure the safety of the cargo in the vehicle and driving safety. Therefore, the undercarriage needs to be locked by a locking mechanism, and the locking mechanism can be unlocked when the undercarriage needs to be separated from the vehicle body.

[0004] How to provide a locking mechanism for a recessed chassis that can conveniently and quickly achieve locking and unlocking of the recessed chassis is a technical problem that those skilled in the art urgently need to solve. Utility Model Content

[0005] The purpose of the present application is to provide a locking mechanism for a recessed chassis and a piggyback transport vehicle, which can conveniently and quickly achieve locking and unlocking of the recessed chassis, ensure the stability of the recessed chassis during transportation, and further ensure the safety of cargo in the vehicle and driving safety.

[0006] In order to solve the above technical problems, the present application provides a locking mechanism for a recessed chassis, comprising a driving part and two locking parts, the locking part comprising a locking hook; the driving part comprises a driving shaft, and screw rods are respectively provided at both side ends of the driving shaft, the thread directions of the two screw rods are opposite and the two screw rods are respectively threadedly connected with nuts, the two nuts are respectively connected to the two locking parts, and the nuts can move along the axial direction of the driving shaft and drive the locking hooks to lock or unlock the recessed chassis.

[0007] Optionally, it further includes a first mounting seat, which is fixed to the vehicle body, the drive shaft passes through the first mounting seat and can rotate relative to the first mounting seat, and the end of the drive shaft extends out of the vehicle body.

[0008] Optionally, the drive shaft is also fixed with two limit blocks, and the two limit blocks are located on the inner sides of the two first mounting seats, or the two limit blocks are respectively located on the outer sides of the two first mounting seats, and the drive shaft is limited to move axially relative to the first mounting seat by the limit blocks and the first mounting seat.

[0009] Optionally, hand wheels are respectively provided at both ends of the driving shaft.

[0010] Optionally, the locking portion also includes a locking rod and a second mounting seat, the locking hook is fixed at one end of the locking rod, the second mounting seat is fixed to the vehicle body, one end of the locking rod away from the locking hook is connected to the nut, the locking rod is hinged to the second mounting seat, and the hinge point is located between the two ends of the locking rod.

[0011] Optionally, it also includes a connecting rod assembly connected between the locking rod and the nut, the connecting rod assembly includes a first connecting rod, a corner connecting rod and a second connecting rod that are hingedly connected in sequence, one end of the first connecting rod away from the corner connecting rod is hinged to the nut, one end of the second connecting rod away from the corner connecting rod is hinged to the locking rod, and the middle part of the first connecting rod is also hingedly connected to a third mounting seat, and the third mounting seat is fixed to the vehicle body.

[0012] Optionally, the driving shaft includes a connecting rod connected between the two screw rods, and the connecting rod is detachably connected to the screw rods.

[0013] Optionally, the connecting rod is a tubular structure, and the end of the tubular structure is sleeved outside the screw rod and connected to the screw rod by bolts, and the bolts are arranged along the radial direction of the screw rod.

[0014] The present application also provides a piggyback transport vehicle, comprising an end chassis, a recessed chassis and the locking mechanism as described above, wherein the driving portion of the locking mechanism is arranged on the end chassis, the outer side wall of the recessed chassis is provided with a locking hole, and the locking hook of the locking mechanism can cooperate with and disengage from the locking hole.

[0015] Optionally, the end chassis and the concave chassis are also respectively provided with mutually adapted traction hooks, and the traction hook provided on the concave chassis is provided with the locking hole;

[0016] The locking mechanism is arranged below the floor of the end chassis, and the locking portion of the locking mechanism and the end of the driving shaft extend out of the side beams on both sides of the end chassis.

[0017] The locking mechanism of the recessed chassis and the piggyback transport vehicle provided by the present application have the following excellent technical effects:

[0018] A locking hole is provided on the outer side wall of the recessed chassis. When the nut moves along the screw rod, the locking part can be driven to make the locking hook engage with or disengage from the locking hole. When the locking hook engages with the locking hole, the locking mechanism is in a locked state, which can play a role in mechanically preventing the recessed chassis from falling off, so that the recessed chassis and the end chassis remain stable. When the locking hook disengages from the locking hook, the locking mechanism is in an unlocked state, and the recessed chassis can move and rotate relative to the end chassis.

[0019] The threads of the two screws are in opposite directions, so when the drive shaft rotates, the two nuts can move closer to or farther from each other along the axial direction of the screw (i.e., the drive shaft). On one side of the body of the piggyback transport vehicle, by rotating the drive shaft, the two screws can be rotated synchronously, and the two nuts can be moved along the axial direction of the screws, and the locking part is driven to act, so that the two lock hooks can be engaged with or disengaged from the corresponding lock holes, thereby achieving the locking and unlocking of the recessed chassis. Compared with the solution of locking and unlocking the recessed chassis through push-pull operations, this method is more labor-saving and convenient to operate.

[0020] Furthermore, by rotating the drive shaft to a locked or unlocked state, the threaded cooperation between the nut and the screw rod can play a limiting role, so that the position of the lock hook is stable, and there is no need to set up an additional locking component. This can prevent the lock hook from being separated from the lock hole due to vibration of the vehicle body during transportation. In other words, the locking mechanism of the recessed chassis provided in this embodiment has a self-locking function, which simplifies the overall structure while ensuring the stability of the locked and unlocked states. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a partial top view of a piggyback transport vehicle provided in an embodiment of the present application;

[0022] Figure 2 yes Figure 1 The main view of

[0023] Figure 3 yes Figure 2 A magnified view of middle;

[0024] Figure 4 is a structural schematic diagram of a locking mechanism of a recessed chassis provided in an embodiment of the present application;

[0025] Figure 5 yes Figure 4 A partial enlarged view of

[0026] Figure 6 yes Figure 5 A top view of

[0027] Figure 7 It is a structural schematic diagram of the piggyback transport vehicle when the locking mechanism is in a locked state;

[0028] Figure 8 It is a structural schematic diagram of the piggyback transport vehicle with the locking mechanism in the unlocked state.

[0029] Attached Figure 1-Figure 8 In the figure, the reference numerals are described as follows:

[0030] 100 locking mechanism; 200 recessed chassis, 201 locking hole; 300 end chassis; 400 towing hook;

[0031] 1 driving part, 11 screw rod, 12 nut, 13 connecting rod, 14 bolt, 15 limit block, 16 hand wheel, 17 driving shaft;

[0032] 2 locking part, 21 locking hook, 22 locking rod, 23 second mounting seat;

[0033] 3 connecting rod assembly, 31 first connecting rod, 32 corner connecting rod, 33 second connecting rod, 34 third mounting seat;

[0034] 4 First mounting seat. DETAILED DESCRIPTION

[0035] In order to enable those skilled in the art to better understand the technical solution of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0036] The embodiment of the present application provides a locking mechanism of a recessed chassis and a piggyback transport vehicle, wherein: Figure 1 and Figure 2 As shown, the body of the piggyback transport vehicle includes a locking mechanism 100 of a recessed chassis, a recessed chassis 200 and an end chassis 300. The end chassis 300 and the recessed chassis 200 are respectively provided with mutually adapted traction hooks 400, and cooperate with the traction hooks 400 to achieve longitudinal traction. The locking mechanism 100 is provided on the end chassis 300 and can cooperate with the recessed chassis 200 to achieve locking and unlocking of the recessed chassis 200. The recessed chassis 200 is used to carry goods. When the recessed chassis 200 needs to move and rotate relative to the end chassis 300, the locking mechanism 100 is in an unlocked state. During transportation, when there is no need for relative movement or rotation between the recessed chassis 200 and the end chassis 300, the locking mechanism 100 is in a locked state, so as to ensure the stability of the position of the recessed chassis 200, and to ensure the safety of the goods in the vehicle and the driving safety.

[0037] like Figure 3-Figure 5 As shown, the locking mechanism 100 of the recessed chassis 200 includes a driving portion 1 and two locking portions 2, each locking portion 2 includes a locking hook 21, the driving portion 1 includes a driving shaft 17, and screw rods 11 are respectively provided at both ends of the driving shaft 17, each screw rod 11 is threadedly connected with a nut 12, and the two nuts 12 are respectively arranged corresponding to the two locking portions 2, and the thread directions of the two screw rods 11 are opposite. Therefore, when the driving shaft 17 rotates, the two nuts 12 can respectively approach or move away from each other along the axial direction of the screw rod 11 (i.e., the driving shaft 17).

[0038] The outer wall of the recessed bottom frame 200 is provided with a locking hole 201. When the nut 12 moves along the screw rod 11, it can drive the locking part 2 to make the locking hook 21 engage with or disengage from the locking hole 201. When the locking hook 21 engages with the locking hole 201, as shown in FIG. Figure 7As shown, the locking mechanism 100 is in a locked state, which can play a role in mechanically preventing the recessed chassis 200 from falling off, so that the recessed chassis 200 and the end chassis 300 remain stable. When the locking hook 21 is separated from the locking hook 21, as shown in FIG. Figure 8 As shown, the locking mechanism 100 is in an unlocked state, and the recessed chassis 200 can move and rotate relative to the end chassis 300 .

[0039] like Figure 4 and Figure 5 As shown, the two locking parts 2 and the two nuts 12 are symmetrically arranged about the central radial section P of the drive shaft 17 in the length direction. In the installed state, the central radial section P of the drive shaft 17 is coplanar with the central plane in the transverse direction of the vehicle body.

[0040] On one side of the body of the saddleback transport vehicle, by rotating the drive shaft 17, the two screw rods 11 can be rotated synchronously, and the two nuts 12 can be moved along the axial direction of the screw rods 11. At the same time, the locking part 2 is driven to act, so that the two locking hooks 21 can respectively cooperate with or disengage from the corresponding locking holes 201, thereby realizing the locking and unlocking of the recessed bottom frame 200. Compared with the solution of locking and unlocking the recessed bottom frame 200 through push-pull operations, this method is more labor-saving and convenient to operate.

[0041] Furthermore, by rotating the drive shaft 17 to a locked or unlocked state, the threaded cooperation between the nut 12 and the screw rod 11 can play a limiting role, so that the position stability of the lock hook 21 is good, and there is no need to set up an additional locking component. During transportation, the lock hook 21 can be prevented from being separated from the lock hole 201 due to vibration of the vehicle body. In other words, the locking mechanism 100 of the recessed chassis 200 provided in this embodiment has a self-locking function, which simplifies the overall structure while ensuring the stability of the locked and unlocked states.

[0042] like Figure 3 As shown, the lock hole 201 is provided on the traction hook 400 of the concave chassis 200. Figure 7 and Figure 8 As shown, the locking mechanism 100 is arranged under the floor of the end frame 300, and the ends of the locking part 2 and the driving shaft 17 are extended out of the side beams on both sides of the end frame 300, which is convenient for rotating the driving shaft 17 and can ensure that the locking hook 21 of the locking part 2 can cooperate with and disengage from the locking hole 201 from the outside.

[0043] Furthermore, placing the locking mechanism 100 below the floor of the end chassis 300 can avoid affecting the space above the floor of the end chassis 300, while also providing protection for the locking mechanism 100 to avoid damage from collision with heavy objects or rust from contact with rain, thereby ensuring the service life of the locking mechanism 100.

[0044] like Figure 4-Figure 6 As shown, the end of the driving shaft 17 is connected to a hand wheel 16, and the driving shaft 17 is rotated by the hand wheel 16. Of course, in this embodiment, the end of the driving shaft 17 can also be set to a hexagonal head structure, which can be an inner hexagonal structure or an outer hexagonal structure, and the driving shaft 17 can be rotated by operating a wrench in cooperation with the hexagonal head structure, and the setting of the hand wheel 16 can improve the convenience of operation.

[0045] like Figure 5 and Figure 6 As shown, the locking mechanism 100 further includes a first mounting seat 4, which is fixed to the vehicle body, specifically to the end chassis 300, the drive shaft 17 can pass through the first mounting seat 4 and can rotate relative to the first mounting seat 4, the end of the drive shaft 17 extends out of the vehicle body, and the first mounting seat 4 can provide support for the drive shaft 17 to ensure the stability of the locking mechanism 100 installed on the vehicle body. Of course, the side beam of the end chassis 300 can also be provided with a mounting hole, the drive shaft 17 passes through the mounting hole, and is supported by the hole wall of the mounting hole, and the provision of the first mounting seat 4 can ensure the installation stability of the locking mechanism 100 while reducing the strength requirements of the side wall of the mounting hole.

[0046] Specifically, the first mounting seat 4 can be an integrated structure and be provided with a mounting hole, and the drive shaft 17 passes through the mounting hole. Alternatively, the first mounting seat 4 can also be set as a split structure and include a first component and a second component. The first component and the second component are respectively fixed to the end base frame 300 and enclosed to form a mounting hole. No specific limitation is made here.

[0047] like Figure 5 and Figure 6 As shown, the drive shaft 17 is fixed with two limit blocks 15, and the limit blocks 15 can be fixed to the drive shaft 17 by welding. The two limit blocks 15 are respectively located on the outer sides of the two first mounting seats 4. Through the abutment between the limit blocks 15 and the first mounting seats 4, the drive shaft 17 is limited to move axially relative to the first mounting seats 4, thereby ensuring the position stability of the locking mechanism 100 relative to the vehicle body in the lateral direction of the vehicle body.

[0048] Of course, two limit blocks 15 may be located between the first mounting seat 4 and arranged close to one side of the first mounting seat 4. The limit blocks 15 and the first mounting seat 4 may also be used to limit the locking mechanism 100 to ensure the position stability of the locking mechanism 100 relative to the vehicle body in the lateral direction of the vehicle body.

[0049] like Figure 5As shown, the locking part 2 also includes a locking rod 22 and a second mounting seat 23, the locking hook 21 is fixed to one end of the locking rod 22, the end of the locking rod 22 away from the locking hook 21 is connected to the nut 12 through the connecting rod assembly 3, the second mounting seat 23 is fixed to the end chassis 300, and the second mounting seat 23 is hinged to the locking rod 22, and the hinge point is located in the middle position between the two ends of the locking rod 22, which can be the middle position in the length direction or any position between the two ends. When the nut 12 moves and drives one end of the locking rod 22 to move through the connecting rod assembly 3, the locking rod 22 can rotate around the hinge point and drive the locking hook 21 to move to match or disengage with the lock hole 201.

[0050] like Figure 5 As shown, the hinge point is located in the middle of the locking rod 22 on the side close to the connecting rod assembly 3, that is, the distance between the hinge point and the locking hook 21 is greater than the distance between the hinge point and the connecting rod assembly 3. In this way, the nut 12 can move a small distance to drive the locking hook 21 to move a large distance through the connecting rod assembly 3, thereby simplifying manual operation in the process of locking and unlocking the recessed chassis 200.

[0051] In this embodiment, the lock hook 21 and the lock rod 22 can be an integrated structure or a split structure and can be fixed by welding, fastener connection, etc.

[0052] Of course, in this embodiment, the nut 12 can also be directly connected to the locking rod 22 of the locking part 2, and the setting of the connecting rod assembly 3 can improve the flexibility of the installation of the driving part 1, so that there is a certain distance between the axis of the driving shaft 17 and the position of the locking hook, thereby avoiding the setting of the driving part 1 from interfering with the bogie located under the end frame 300.

[0053] In this embodiment, there is no limitation on the specific structure of the connecting rod assembly 3. Figure 6 As shown, the connecting rod assembly 3 includes a first connecting rod 31, a corner connecting rod 32, and a second connecting rod 33 which are hingedly connected in sequence, wherein one end of the first connecting rod 31 away from the corner connecting rod 32 is hingedly connected to the nut 12, and one end of the second connecting rod 33 away from the corner connecting rod 32 is hingedly connected to the lock rod 22, and a third mounting seat 34 is also hingedly connected to the middle part of the first connecting rod 31, and the third mounting seat 34 is fixed to the end chassis 300. The corner connecting rod 32 is connected between the first connecting rod 31 and the second connecting rod 33, and the second connecting rod 33 is driven to move through the first connecting rod 31. When the nut 12 moves, it can act on the first connecting rod 31 to make the first connecting rod 31 rotate around the third mounting seat 34, and drive the second connecting rod 33 to move through the corner connecting rod 32, thereby driving the lock rod 22 to rotate, so as to achieve locking and unlocking.

[0054] The axes of the first connecting rod 31 and the second connecting rod 33 are not in the same plane. The corner connecting rod 32 can realize force transmission and simplify the overall structure. Of course, in this embodiment, the corner connecting rod 32 and the first connecting rod can be set as an integral structure, or the corner connecting rod 32 and the second connecting rod 33 can be set as an integral structure, and when the first connecting rod 31, the second connecting rod 33 and the corner connecting rod 32 are respectively set as split structures, the length of the corner connecting rod 32 is smaller, which can avoid deformation at the corner after long-term use and improve the service life.

[0055] Alternatively, in this embodiment, the connecting rod assembly 3 can also be set as a rigid connecting piece. The setting of the connecting rod assembly 3 can avoid deformation after long-term use, ensure that the lock hook 21 can accurately cooperate with and disengage from the lock hole 201, and extend the service life of the locking mechanism 100.

[0056] like Figure 5-Figure 8 As shown, the driving shaft 17 also includes a connecting rod 13 connected between the two screw rods 11. The connecting rod 13 is connected to the screw rods 11, and the outer surface of the connecting rod 13 is not provided with threads, which can simplify the processing technology and reduce costs.

[0057] The connecting rod 13 and the screw rod 11 are detachably connected, which is convenient for overall assembly. In addition, the length of the connecting rod 13 can be set according to the actual width of the vehicle body, etc., which is convenient for replacement of the connecting rod 13. At the same time, when one of the screw rods 11 is damaged, it is convenient to replace it separately, which is easy to operate and economical.

[0058] Furthermore, the connecting rod 13 is a tubular structure, which can achieve the purpose of lightweight. The end of the tubular structure is sleeved outside the screw rod 11 and connected by a bolt 14. The bolt 14 is arranged along the radial direction of the screw rod 11 and passes through the connecting rod 13 and the screw rod 11. Alternatively, the connecting rod 13 and the screw rod 11 can also be key-connected to achieve coaxial transmission. No specific restrictions are made here.

[0059] Alternatively, in the present embodiment, a sleeve can be provided to achieve connection between the connecting rod 13 and the screw rod 11. One end of the sleeve is sleeved and fixed to the screw rod 11, and the other end of the sleeve is sleeved and fixed to the connecting rod 13. When the connecting rod 13 is provided as a tubular structure, the overall structure can be simplified and the overall weight can be reduced.

[0060] Herein, the hinged connection between the connecting rods and the hinged connection between the connecting rods and the mounting seat can be achieved by fastener connection or pin connection, and no specific limitation is made here.

[0061] The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A locking mechanism for a recessed chassis, characterized in that: It comprises a driving part (1) and two locking parts (2), wherein the locking parts (2) comprise locking hooks (21); The driving portion (1) comprises a driving shaft (17), and screw rods (11) are respectively provided at the two side ends of the driving shaft (17), the two screw rods (11) have threads in opposite directions and are respectively threadedly connected to nuts (12), the two nuts (12) are respectively connected to the two locking portions (2), and the nuts (12) are capable of moving along the axial direction of the driving shaft (17) and driving the locking hooks (21) to lock or unlock the recessed chassis (200).

2. The locking mechanism of the recessed chassis according to claim 1, characterized in that: It also comprises a first mounting seat (4), the first mounting seat (4) being fixed to the vehicle body, the drive shaft (17) passing through the first mounting seat (4) and being rotatable relative to the first mounting seat (4), and the end of the drive shaft (17) extending out of the vehicle body.

3. The locking mechanism of the recessed chassis according to claim 2, characterized in that: The drive shaft (17) is further provided with two limit blocks (15), the two limit blocks (15) being located on the inner sides of the two first mounting seats (4), or the two limit blocks (15) being located on the outer sides of the two first mounting seats (4), respectively, and the drive shaft (17) is restricted from axial movement relative to the first mounting seat (4) by the limit blocks (15) and the first mounting seat (4).

4. The locking mechanism of the recessed chassis according to claim 2, characterized in that: Hand wheels (16) are respectively provided at both ends of the driving shaft (17).

5. The locking mechanism of the recessed chassis according to claim 1, characterized in that: The locking portion (2) further comprises a locking rod (22) and a second mounting seat (23); the locking hook (21) is fixedly mounted on one end of the locking rod (22); the second mounting seat (23) is fixed to the vehicle body; one end of the locking rod (22) away from the locking hook (21) is connected to the nut (12); the locking rod (22) and the second mounting seat (23) are hingedly connected, and the hinge point is located between the two ends of the locking rod (22).

6. The locking mechanism of the recessed chassis according to claim 5, characterized in that: It also includes a connecting rod assembly (3) connected between the locking rod (22) and the nut (12), the connecting rod assembly (3) including a first connecting rod (31), a corner connecting rod (32) and a second connecting rod (33) which are hingedly connected in sequence, one end of the first connecting rod (31) away from the corner connecting rod (32) is hingedly connected to the nut (12), one end of the second connecting rod (33) away from the corner connecting rod (32) is hingedly connected to the locking rod (22), and the middle part of the first connecting rod (31) is also hingedly connected to a third mounting seat (34), and the third mounting seat (34) is fixed to the vehicle body.

7. The locking mechanism of the recessed chassis according to any one of claims 1 to 6, characterized in that: The drive shaft (17) comprises a connecting rod (13) connected between the two screw rods (11), and the connecting rod (13) is detachably connected to the screw rods (11).

8. The locking mechanism of the recessed chassis according to claim 7, characterized in that: The connecting rod (13) is a tubular structure, the end of which is sleeved outside the screw rod (11) and connected to the screw rod (11) via a bolt (14), and the bolt (14) is arranged along the radial direction of the screw rod (11).

9. A piggyback transport vehicle, characterized in that: The invention comprises an end base frame (300), a recessed base frame (200), and a locking mechanism (100) according to any one of claims 1 to 8, wherein a driving portion (1) of the locking mechanism (100) is arranged on the end base frame (300), an outer side wall of the recessed base frame (200) is provided with a locking hole (201), and a locking hook (21) of the locking mechanism (100) can be engaged with and disengaged from the locking hole (201).

10. The piggyback transport vehicle according to claim 9, characterized in that: The end chassis (300) and the recessed chassis (200) are also respectively provided with mutually adapted traction hooks (400), and the traction hook (400) provided on the recessed chassis (200) is provided with the locking hole (201); The locking mechanism (100) is arranged below the floor of the end chassis (300), and the locking portion (2) of the locking mechanism (100) and the end of the driving shaft (17) extend out of the side beams on both sides of the end chassis (300).

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