A cargo box traction lock

Abstract

The present invention discloses a cargo box towing lock, comprising a lock shaft and a lock body, and also comprising a main lock hook for locking the lock shaft, a secondary lock hook for locking the main lock hook, a secondary lock hook driving member for driving the secondary lock hook to rotate, and a secondary lock hook retaining member for keeping the secondary lock hook and the main lock hook in a separated state, the main lock hook and the secondary lock hook are both rotatably connected to the lock body, the lock body is provided with a first torsion spring for driving the main lock hook to reset and a second torsion spring for driving the secondary lock hook to reset, the secondary lock hook driving member is installed on the lock body, one end of the secondary lock hook retaining member is rotatably connected to the lock body, and an elastic member is connected between the other end and the lock body. The cargo box towing lock provided by the present invention has the advantages of simple structure, low cost, good reliability and can meet different application scenarios.

Description

Technical Field

[0001] The invention relates to the technical field of locking and towing, and in particular to a cargo box towing lock. Background Art

[0002] When an unmanned vehicle carries a cargo box, it is necessary to set up a cargo box carrying platform. The cargo box and the goods loaded inside it sometimes weigh hundreds of kilograms. How to reliably lock the cargo box to the unmanned vehicle's carrying platform so that the cargo box can be safely and stably raised, lowered, and moved with the carrying platform has become an urgent problem to be solved.

[0003] At present, an unmanned vehicle usually only carries one cargo box. In order to increase the transportation volume and other purposes, an unmanned vehicle may need to carry multiple cargo boxes in the future. To ensure stability and safety during transportation, the cargo boxes need to be reliably locked.

[0004] In addition, when an unmanned vehicle delivers a cargo box to the destination for unloading (for example, delivers it to a post station to wait for collection or pickup), how to lock the cargo box in a designated area to prevent accidental movement or loss also becomes a problem that needs to be solved.

[0005] Conventional locking devices cannot meet the requirements of the above-mentioned multiple application scenarios at the same time, so it is necessary to design a new type of cargo box towing lock. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a cargo box towing lock which has a simple structure, low cost, good reliability and can meet the requirements of different application scenarios.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A cargo box towing lock comprises a lock shaft and a lock body, and also comprises a main lock hook for locking the lock shaft, a secondary lock hook for locking the main lock hook, a secondary lock hook driving member for driving the secondary lock hook to rotate, and a secondary lock hook retaining member for keeping the secondary lock hook and the main lock hook in a separated state. The main lock hook and the secondary lock hook are both rotatably connected to the lock body, the lock body is provided with a first torsion spring for driving the main lock hook to reset and a second torsion spring for driving the secondary lock hook to reset, the secondary lock hook driving member is installed on the lock body, one end of the secondary lock hook retaining member is rotatably connected to the lock body, and the other end is connected to the lock body with an elastic member.

[0009] As a further improvement of the above technical solution: a locking portion is provided on the side of the secondary lock hook close to the main lock hook, a first abutment portion and a second abutment portion are provided on the side of the secondary lock hook away from the main lock hook, the secondary lock hook driving member is a telescopic driving member and abuts against the first abutment portion, and the secondary lock hook retaining member abuts against the second abutment portion.

[0010] As a further improvement of the above technical solution: a first mounting shaft is provided on the lock body, the main lock hook and the auxiliary lock hook retaining member are rotatably mounted on the first mounting shaft, and the elastic member is located on a side of the auxiliary lock hook away from the main lock hook.

[0011] As a further improvement of the above technical solution: hook portions are provided at both ends of the elastic member, a first connecting pin is provided on the lock body, a second connecting pin is provided on the auxiliary lock hook retaining member, the hook portion at one end of the elastic member is connected to the first connecting pin, and the hook portion at the other end of the elastic member is connected to the second connecting pin.

[0012] As a further improvement of the above technical solution: a first stop portion is provided on the lock body, and the lock shaft and the first stop portion are provided on both sides of the auxiliary lock hook retainer.

[0013] As a further improvement of the above technical solution: the first torsion spring is arranged on the first mounting shaft, a torsion arm of the first torsion spring is connected to the main locking hook, and the other torsion arm of the first torsion spring is in contact with the first stop portion.

[0014] As a further improvement of the above technical solution: a second mounting shaft and a second stop portion are also provided on the lock body, the auxiliary lock hook is rotatably installed on the second mounting shaft, the second torsion spring is arranged on the second mounting shaft, one torsion arm of the second torsion spring is connected to the auxiliary lock hook, and the other torsion arm of the second torsion spring is abutted against the second stop portion.

[0015] As a further improvement of the above technical solution: the second abutting portion is provided with a pin shaft, the auxiliary lock hook retaining member is provided with a positioning groove matching with the pin shaft, and a torsion arm of the second torsion spring is connected to the pin shaft.

[0016] As a further improvement of the above technical solution: a V-shaped guide groove is provided on one side of the lock body close to the lock shaft.

[0017] As a further improvement of the above technical solution: the auxiliary lock hook driving component is a cylinder, an oil cylinder or an electric push rod.

[0018] As a further improvement of the above technical solution: the elastic member is a coil spring or an elastic rope.

[0019] Compared with the prior art, the advantages of the present invention are as follows: the cargo box towing lock disclosed in the present invention can be used to install the lock shaft on one cargo box and the lock body on another cargo box, so that the cargo boxes can be locked together, so that each cargo box forms a whole, which is conducive to ensuring the stability of each cargo box on the unmanned vehicle; or the lock shaft is installed on the load-bearing platform and the lock body is installed on the cargo box, so that the load-bearing platform and the cargo box can be locked together, so that the cargo box can be safely and stably lifted and moved with the load-bearing platform; or the lock shaft is installed on the ground and the lock body is installed on the cargo box, so that the cargo box can be locked at the destination, which can meet the requirements of different application scenarios. Specifically, when the lock shaft and the lock body are close to each other, the lock shaft can push the main lock hook to rotate and get stuck in the main lock hook, and then the auxiliary lock hook is driven by the auxiliary lock hook to lock the main lock hook, so as to prevent the main lock hook from rotating in the opposite direction, thereby achieving reliable locking. When unlocking is required, the auxiliary lock hook driving member drives the auxiliary lock hook to rotate in the opposite direction and separate from the main lock hook. When the lock shaft and the lock body move away from each other, the lock shaft can push the main lock hook to rotate in the opposite direction and finally separate from the main lock hook to achieve unlocking. The structure is simple and the cost is low. After unlocking, regardless of whether the auxiliary lock hook driving member is reset, the auxiliary lock hook retaining member, under the elastic force of the elastic member, keeps the auxiliary lock hook and the main lock hook separated, and the next locking action can be performed directly without detection and confirmation, which has good reliability and is more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the cargo box towing lock of the present invention in the unlocked state.

[0021] Figure 2 It is a structural schematic diagram of the cargo box traction lock in a locked state of the present invention.

[0022] Figure 3 It is a schematic diagram of the three-dimensional structure of the cargo box towing lock of the present invention after the lock shaft is hidden.

[0023] The numbers in the figure represent: 1. lock shaft; 2. lock body; 21. first mounting shaft; 22. first stop portion; 23. first torsion spring; 24. second mounting shaft; 25. second stop portion; 26. second torsion spring; 27. guide groove; 28. first connecting pin; 3. main lock hook; 4. auxiliary lock hook; 41. locking portion; 42. first abutment portion; 43. second abutment portion; 5. auxiliary lock hook driving member; 6. auxiliary lock hook retaining member; 61. positioning groove; 62. second connecting pin; 7. elastic member; 71. bent hook portion. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Embodiment 1

[0026] like Figure 1 , Figure 2 and Figure 3 As shown, the cargo box towing lock of this embodiment includes a lock shaft 1 and a lock body 2, and also includes a main lock hook 3 for locking the lock shaft 1, a secondary lock hook 4 for locking the main lock hook 3, a secondary lock hook driving member 5 for driving the secondary lock hook 4 to rotate, and a secondary lock hook retaining member 6 for keeping the secondary lock hook 4 and the main lock hook 3 separated. The main lock hook 3 and the secondary lock hook 4 are both rotatably connected to the lock body 2, and the lock body 2 is provided with a first torsion spring 23 for driving the main lock hook 3 to reset and a second torsion spring 26 for driving the secondary lock hook 4 to reset. The secondary lock hook driving member 5 is installed on the lock body 2, and one end of the secondary lock hook retaining member 6 is rotatably connected to the lock body 2, and an elastic member 7 is connected between the other end and the lock body 2. The elastic member 7 can be, for example, a common spiral spring, elastic rope, etc., with hooks 71 at both ends of the elastic member 7, a first connecting pin 28 on the lock body 2, a second connecting pin 62 on the auxiliary lock hook retainer 6, the hook 71 at one end of the elastic member 7 is connected to the first connecting pin 28, and the hook 71 at the other end of the elastic member 7 is connected to the second connecting pin 62, which has a simple structure and is easy to install and disassemble. In this embodiment, the lock shaft 1 is installed on one cargo box, and the lock body 2 (or other components except the lock shaft 1) is installed on another cargo box.

[0027] The cargo box traction lock of this embodiment is specifically used. When the lock shaft 1 and the lock body 2 move with the two cargo boxes to approach each other (both cargo boxes move or one cargo box remains stationary and the other cargo box moves), the lock shaft 1 can push the main lock hook 3 to rotate and get stuck in the main lock hook 3, and then the auxiliary lock hook 4 rotates and locks the main lock hook 3 under the action of the auxiliary lock hook driving member 5 to prevent the main lock hook 3 from rotating in the opposite direction, thereby realizing reliable locking between the two cargo boxes. By locking all cargo boxes in pairs in sequence to form a whole, it is helpful to ensure the stability of each cargo box on the unmanned vehicle. When unlocking is required, the auxiliary lock hook driving member 5 drives the auxiliary lock hook 4 to rotate in the opposite direction and separate from the main lock hook 3. When the lock shaft 1 and the lock body 2 move away from each other with the two cargo boxes (both cargo boxes move or one cargo box remains stationary and the other cargo box moves), the lock shaft 1 can push the main lock hook 3 to rotate in the opposite direction and finally separate from the main lock hook 3, and the two cargo boxes are unlocked from each other. The structure is simple and the cost is low. After unlocking, regardless of whether the auxiliary lock hook driving component 5 is reset, the auxiliary lock hook retaining component 6, under the elastic force of the elastic component 7, keeps the auxiliary lock hook 4 and the main lock hook 3 separated, and the next locking action can be performed directly without detection and confirmation, which has good reliability and is more convenient to use.

[0028] Furthermore, in this embodiment, a locking portion 41 is provided on the side of the secondary lock hook 4 close to the primary lock hook 3, a first abutting portion 42 and a second abutting portion 43 are provided on the side of the secondary lock hook 4 away from the primary lock hook 3, the secondary lock hook driving member 5 is a telescopic driving member and abuts against the first abutting portion 42, and the secondary lock hook retaining member 6 abuts against the second abutting portion 43. Figure 2Since the secondary lock hook 4 is pressed against by the secondary lock hook driving member 5, the secondary lock hook 4 cannot rotate counterclockwise, and under the action of the secondary lock hook 4, the main lock hook 3 cannot rotate clockwise, and the lock shaft 1 is restricted in the main lock hook 3 and cannot be separated from the main lock hook 3, that is, the lock shaft 1 is effectively locked. Figure 2 to Figure 1 When unlocking is required, the secondary lock hook driving member 5 extends out and pushes the secondary lock hook 4 to rotate clockwise, so that the secondary lock hook 4 is separated from the main lock hook 3. The lock shaft 1 can drive the main lock hook 3 to rotate clockwise and finally separate from the main lock hook 3 to achieve unlocking. After unlocking, regardless of whether the secondary lock hook driving member 5 remains in the extended state, the secondary lock hook retaining member 6, under the elastic force of the elastic member 7, keeps the secondary lock hook 4 and the main lock hook 3 separated, and the next locking action can be performed directly without detection and confirmation, which has good reliability and is more convenient to use. Preferably, the secondary lock hook driving member 5 can be, for example, a cylinder, an oil cylinder or an electric push rod.

[0029] Furthermore, in this embodiment, the lock body 2 is provided with a first mounting shaft 21, the primary lock hook 3 and the secondary lock hook retainer 6 are rotatably mounted on the first mounting shaft 21, and the elastic member 7 is located on the side of the secondary lock hook 4 away from the primary lock hook 3. Since the distance between the elastic member 7 and the first mounting shaft 21 is relatively far, when the lock shaft 1 drives the secondary lock hook retainer 6 to rotate counterclockwise, the elastic member 7 can produce a large elastic deformation, and the stored force is large (see Figure 2 At this time, since the auxiliary lock hook holder 6 is tightly pressed against the lock shaft 1, the elastic force cannot drive the auxiliary lock hook holder 6 to rotate clockwise, and the auxiliary lock hook holder 6 cannot drive the auxiliary lock hook 4 to rotate clockwise, resulting in failure to unlock. Figure 1 After unlocking, the large elastic force generated by the elastic member 7 can ensure that the auxiliary lock hook retaining member 6 can automatically rotate clockwise, thereby ensuring that the auxiliary lock hook 4 is separated from the main lock hook 3 and is in a separated state.

[0030] Furthermore, in this embodiment, the lock body 2 is provided with a first stopper 22, and the lock shaft 1 and the first stopper 22 are respectively provided on both sides of the auxiliary lock hook retainer 6. Figure 2 During the locking process, when the secondary lock hook retainer 6 rotates counterclockwise under the action of the lock shaft 1 and abuts against the first stop portion 22, it indicates that the lock shaft 1 has been locked in place, which can prevent the lock shaft 1 from driving the main lock hook 3 to rotate too much.

[0031] As a preferred embodiment, the first torsion spring 23 is arranged on the first mounting shaft 21, one torsion arm of the first torsion spring 23 is connected to the main lock hook 3, and the other torsion arm of the first torsion spring 23 is in contact with the first stopper 22. When the main lock hook 3 rotates clockwise under the action of the lock shaft 1, the first torsion spring 23 is twisted, which can provide a certain resistance to prevent the lock shaft 1 and the lock body 2, and the main lock hook 3 and the first stopper 22 from colliding. After the auxiliary lock hook 4 is separated from the main lock hook 3, the elastic deformation of the first torsion spring 23 is restored, driving the main lock hook 3 to quickly reset, facilitating the separation of the lock shaft 1 from the main lock hook 3, and the structure is simple, reliable, and highly automated.

[0032] As a preferred embodiment of the present invention, the lock body 2 is further provided with a second mounting shaft 24 and a second stopper 25, the auxiliary lock hook 4 is rotatably mounted on the second mounting shaft 24, the second torsion spring 26 is provided on the second mounting shaft 24, one torsion arm of the second torsion spring 26 is connected to the auxiliary lock hook 4, and the other torsion arm of the second torsion spring 26 abuts against the second stopper 25. The second torsion spring 26 can provide a certain resistance to prevent the auxiliary lock hook 4 from malfunctioning. When the auxiliary lock hook driving member 5 extends to push the auxiliary lock hook 4 to rotate clockwise, the second torsion spring 26 is twisted. After the auxiliary lock hook driving member 5 is retracted, the elastic deformation of the second torsion spring 26 is restored, driving the auxiliary lock hook 4 to reset, the structure is simple, reliable, and the degree of automation is high. Furthermore, the second abutting portion 43 is provided with a pin shaft, and the auxiliary lock hook retainer 6 is provided with a positioning groove 61 that cooperates with the pin shaft, which helps the auxiliary lock hook retainer 6 to drive the auxiliary lock hook 4 to rotate clockwise and maintain a separated state from the main lock hook 3; one torsion arm of the second torsion spring 26 is connected to the pin shaft, the structure is simple, and the connection is convenient.

[0033] As a preferred embodiment, a V-shaped guide groove 27 is provided on one side of the lock body 2 close to the lock shaft 1. The guide groove 27 can provide a guiding function to guide the lock shaft 1 to be smoothly inserted into the main lock hook 3.

[0034] The working principle of the cargo box traction lock of this embodiment is as follows:

[0035] Locking process:

[0036] Depend on Figure 1 to Figure 2 , the lock shaft 1 and the lock body 2 are close to each other, the main lock hook 3 and the auxiliary lock hook retainer 6 rotate counterclockwise around the first installation axis 21 under the action of the lock shaft 1, the lock shaft 1 is stuck in the main lock hook 3, and the first torsion spring 23 is twisted, and the elastic member 7 is stretched. When the auxiliary lock hook retainer 6 rotates counterclockwise under the action of the lock shaft 1 and presses against the first stopper 22, it indicates that the lock shaft 1 has been locked in place. After the lock shaft 1 is locked in place, the auxiliary lock hook driving member 5 retracts, and the auxiliary lock hook 4 rotates counterclockwise to reset under the elastic force of the second torsion spring 26. The auxiliary lock hook 4 presses against the main lock hook 3 to prevent the main lock hook 3 from rotating clockwise, achieving reliable locking.

[0037] Unlocking process:

[0038] Depend on Figure 2 to Figure 1 , the secondary lock hook driving member 5 extends out, pushing the secondary lock hook 4 to rotate clockwise, and at the same time the second torsion spring 26 is twisted, the secondary lock hook 4 is separated from the main lock hook 3, and the elastic deformation of the first torsion spring 23 is restored, driving the main lock hook 3 to rotate clockwise and quickly reset, and the lock shaft 1 can be separated from the main lock hook 3 to achieve unlocking. After unlocking, even if the secondary lock hook driving member 5 is retracted, at this time, the secondary lock hook retaining member 6, under the elastic force of the elastic member 7, prevents the secondary lock hook 4 from rotating counterclockwise and remains separated from the main lock hook 3, and the next locking action can be performed directly without detection and confirmation, which has good reliability and is more convenient to use.

[0039] Embodiment 2

[0040] The structure of the cargo box traction lock of this embodiment is basically the same as that of the first embodiment, except that: in this embodiment, the lock shaft 1 is installed on the load-bearing platform, the lock body 2 (or other components except the lock shaft 1) is installed on the cargo box, the lock shaft 1 rises and falls with the load-bearing platform, and the other parts of the cargo box traction lock remain stationary, so that the locking and unlocking between the load-bearing platform and the cargo box can be realized, and the cargo box can be safely and stably lifted and moved with the load-bearing platform when locked. Of course, in another embodiment, the lock body 2 (or other components except the lock shaft 1) can also be installed on the load-bearing platform, and the lock shaft 1 can be installed on the cargo box.

[0041] Embodiment 3

[0042] The structure of the cargo box traction lock of this embodiment is basically the same as that of the first embodiment, except that: in this embodiment, the lock shaft 1 is installed on the ground (for example, the target position of the post station), the lock body 2 (or other components except the lock shaft 1) is installed on the cargo box, the lock shaft 1 remains stationary, and the remaining parts of the cargo box traction lock move with the cargo box, which can also realize the locking and unlocking process of the first embodiment. When locking, the cargo box can be fixed at the target position to prevent the cargo box from moving unnecessarily. Of course, in another embodiment, the lock body 2 (or other components except the lock shaft 1) can also be installed on the ground, and the lock shaft 1 can be installed on the cargo box.

[0043] Embodiment 4

[0044] The structure of the cargo box towing lock of this embodiment is basically the same as that of the third embodiment, except that: in this embodiment, the lock shaft 1 is installed on the ground and is a telescopic structure, and the lock body 2 (or other components except the lock shaft 1) is installed on the cargo box. Although the lock shaft 1 cannot move, it can be extended and retracted up and down. When the cargo box needs to be locked, the lock shaft 1 is extended from under the ground, and then the locking and unlocking process in the first embodiment is performed. After the unlocking is completed, the lock shaft 1 is retracted to the ground and does not take up space.

[0045] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A cargo box towing lock, comprising a lock shaft (1) and a lock body (2), characterized in that: The lock body (2) further comprises a main lock hook (3) for locking the lock shaft (1), a secondary lock hook (4) for locking the main lock hook (3), a secondary lock hook driving member (5) for driving the secondary lock hook (4) to rotate, and a secondary lock hook retaining member (6) for keeping the secondary lock hook (4) and the main lock hook (3) in a separated state; the main lock hook (3) and the secondary lock hook (4) are both rotatably connected to the lock body (2); the lock body (2) is provided with a first torsion spring (23) for driving the main lock hook (3) to reset and a second torsion spring (26) for driving the secondary lock hook (4) to reset; the secondary lock hook driving member (5) is installed on the lock body (2); On the lock body (2), one end of the auxiliary lock hook retaining member (6) is rotatably connected to the lock body (2), and the other end is connected to the lock body (2) with an elastic member (7), and the elastic member (7) is a coil spring or an elastic rope; the auxiliary lock hook (4) is provided with a locking portion (41) on the side close to the main lock hook (3), and the auxiliary lock hook (4) is provided with a first abutting portion (42) and a second abutting portion (43) on the side away from the main lock hook (3); the auxiliary lock hook driving member (5) is a telescopic driving member and abuts against the first abutting portion (42), and the auxiliary lock hook retaining member (6) abuts against the second abutting portion (43).

2. The cargo box towing lock according to claim 1, characterized in that: The lock body (2) is provided with a first mounting shaft (21), the main lock hook (3) and the auxiliary lock hook retaining member (6) are rotatably mounted on the first mounting shaft (21), and the elastic member (7) is located on a side of the auxiliary lock hook (4) away from the main lock hook (3).

3. The cargo box towing lock according to claim 2, characterized in that: Hook portions (71) are provided at both ends of the elastic member (7), a first connecting pin (28) is provided on the lock body (2), and a second connecting pin (62) is provided on the auxiliary lock hook retaining member (6), the hook portion (71) at one end of the elastic member (7) is connected to the first connecting pin (28), and the hook portion (71) at the other end of the elastic member (7) is connected to the second connecting pin (62).

4. The cargo box towing lock according to claim 2, characterized in that: The lock body (2) is provided with a first stop portion (22), and the lock shaft (1) and the first stop portion (22) are respectively arranged on two sides of the auxiliary lock hook retaining member (6).

5. The cargo box towing lock according to claim 4, characterized in that: The first torsion spring (23) is arranged on the first installation shaft (21), one torsion arm of the first torsion spring (23) is connected to the main locking hook (3), and the other torsion arm of the first torsion spring (23) is in contact with the first stop portion (22).

6. The cargo box towing lock according to claim 1, characterized in that: The lock body (2) is also provided with a second mounting shaft (24) and a second stopper (25); the auxiliary lock hook (4) is rotatably mounted on the second mounting shaft (24); the second torsion spring (26) is arranged on the second mounting shaft (24); one torsion arm of the second torsion spring (26) is connected to the auxiliary lock hook (4); and the other torsion arm of the second torsion spring (26) is in contact with the second stopper (25).

7. The cargo box towing lock according to claim 6, characterized in that: The second abutment portion (43) is provided with a pin shaft, the auxiliary lock hook retainer (6) is provided with a positioning groove (61) that cooperates with the pin shaft, and a torsion arm of the second torsion spring (26) is connected to the pin shaft.

8. The cargo box towing lock according to any one of claims 1 to 7, characterized in that: A V-shaped guide groove (27) is provided on one side of the lock body (2) close to the lock shaft (1).

9. The cargo box towing lock according to any one of claims 1 to 7, characterized in that: The auxiliary lock hook driving component (5) is a pneumatic cylinder, an oil cylinder or an electric push rod.

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