A locking device

Abstract

A locking device comprises a lock pin and a lock body, the lock body is provided with a locking part, a lock cylinder, a ratchet and a pawl, the lock cylinder is provided with a plurality of lock cylinder teeth in the circumferential direction, the ratchet is coaxially installed with the lock cylinder, the lock body is provided with a first elastic member for making the pawl contact with the ratchet and an unlocking mechanism for making the pawl separate from the ratchet, the pawl is provided with a guide slot, the lock body is provided with a limiting pin and a second elastic member for pushing the limiting pin to move along the guide slot to make the pawl separate from the ratchet, the limiting pin is provided with a reset part for contacting with the lock cylinder teeth to realize reset. Since the ratchet has the one-way rotation characteristic, the lock pin can be clamped into the locking part along the rotation direction of the ratchet under the action of external force or by using the relative movement with the lock body, only when the pawl separates from the ratchet by the action of the unlocking mechanism, the lock pin can drive the ratchet to rotate reversely and separate from the locking part, and after unlocking, no matter whether the pawl is reset or not, the next locking action can be directly performed without detection and confirmation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of logistics equipment, in particular to a locking device. BACKGROUND

[0002] In the end of the traditional factory logistics chain, the carrier such as pallet, trolley, transfer box is generally used as the transfer unit. Under the trend of intelligent logistics, the carrier such as pallet, trolley, transfer box also needs to be intelligently upgraded. The locking and unlocking of the carrier such as pallet, trolley, transfer box becomes crucial. However, the traditional carrier such as pallet, trolley, transfer box lacks effective automatic locking and even does not lock during the transfer process, which is easy to cause damage and safety hazards during transportation. SUMMARY

[0003] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art, and to provide a locking device with simple structure, good reliability, high automation and the ability to meet the needs of unmanned logistics scenarios.

[0004] To solve the above technical problems, the present application adopts the following technical scheme:

[0005] A locking device, comprising a locking pin and a lock body, wherein the lock body is provided with a locking portion, a lock cylinder, a ratchet and a pawl, the lock cylinder is provided with a plurality of lock cylinder teeth in the circumferential direction for locking the locking pin to the locking portion, the ratchet is coaxially installed with the lock cylinder, the lock body is provided with a first elastic member for contacting the pawl with the ratchet and an unlocking mechanism for separating the pawl from the ratchet, the pawl is provided with a guide groove, the lock body is provided with a limit pin and a second elastic member for pushing the limit pin to move along the guide groove to keep the pawl separated from the ratchet, and the limit pin is provided with a reset portion for contacting with the lock cylinder teeth to realize reset.

[0006] As a further improvement of the above technical scheme, the ratchet is provided with two, the lock cylinder is located between the two ratchets, and the pawl is also provided with two and arranged one by one corresponding to the two ratchets.

[0007] As a further improvement of the above technical scheme, the two ends of the limit pin are located in the guide grooves of the two pawls respectively, the reset portion is a flange provided on the outer periphery of the limit pin, and the flange is located between the two pawls.

[0008] As a further improvement of the above technical scheme, a first connecting pin is provided between the two pawls, the lock body is provided with a connecting portion, the first elastic member is a tension spring, one end of the tension spring is connected with the connecting portion, and the other end is connected with the first connecting pin.

[0009] As a further improvement of the above technical solution: the second elastic member is a torsion spring, the lock body is provided with an abutting portion, one torsion arm of the torsion spring abuts against the limiting pin, and the other torsion arm abuts against the abutting portion.

[0010] As a further improvement of the above technical solution: the guide groove is a V-shaped groove.

[0011] As a further improvement of the above technical solution: the lock cylinder is provided with a plurality of lock cylinders and is connected as a whole by a second connecting pin.

[0012] As a further improvement of the above technical solution: the unlocking mechanism comprises a swing arm coaxially installed with the pawl and an unlocking driving member for driving the swing arm to rotate.

[0013] As a further improvement of the above technical solution: the unlocking driving member is of a telescopic structure.

[0014] As a further improvement of the above technical solution: the locking portion is a V-shaped locking groove.

[0015] Compared with the prior art, the locking device disclosed by the application has the advantages that: the locking device disclosed by the application utilizes a ratchet and pawl mechanism to control the rotation of the lock cylinder. Since the ratchet has a one-way rotation characteristic, the locking pin can be clamped into the locking portion along the rotation direction of the ratchet under the action of an external force or by relative movement with the lock body. The locking pin is reliably locked in the locking portion by the lock cylinder teeth. Only after the pawl is separated from the ratchet by the action of the unlocking mechanism, the locking pin can drive the ratchet to rotate in the reverse direction and separate from the locking portion. After unlocking, the limiting pin is moved in the guide groove by the second elastic member, so that the pawl and the ratchet remain separated, avoiding premature locking. Only after the locking pin rotates by a certain angle and the lock cylinder teeth contact and press the limiting pin to reset, the pawl can again contact and lock the ratchet. The structure is simple and effective, the degree of automation is high, the needs of unmanned logistics scenarios can be met, and after unlocking, whether the pawl is reset or not, the next locking action can be directly performed without detection and confirmation. The locking pin will not have a rigid collision with the lock cylinder teeth, use is more convenient, and reliability is better. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a perspective structural schematic view of the locking device of the application.

[0017] Figure 2 is a perspective structural schematic view of the inside of the lock body in the application.

[0018] Figure 3 is Figure 2 is a structural schematic view of the structure after hiding the front ratchet and pawl.

[0019] Figure 4 is a front view structural schematic view of the inside of the lock body in the application.

[0020] Figure 5 is Figure 4 Structure diagram of the structure after hiding the front side pawl.

[0021] Figure 6 is the front structure diagram of the unlocking state inside the lock body in the application.

[0022] In the figure, the numbers represent: 1, lock pin; 2, lock body; 21, locking part; 22, connecting part; 23, abutting part; 3, lock cylinder; 31, lock cylinder tooth; 32, second connecting pin; 4, ratchet wheel; 5, pawl; 51, guide groove; 52, first connecting pin; 53, first elastic member; 6, unlocking mechanism; 61, swing arm; 62, unlocking driving member; 7, limiting pin; 71, reset part; 72, second elastic member. DETAILED DESCRIPTION

[0023] The application will be further described in detail below in combination with the drawings and specific embodiments of the application.

[0024] Figures 1 to 6 An embodiment of the locking device of the application is shown. The locking device of the embodiment includes a lock pin 1 and a lock body 2. The lock body 2 is provided with a locking part 21, a lock cylinder 3, a ratchet wheel 4 and a pawl 5. The lock cylinder 3 is provided with a plurality of lock cylinder teeth 31 for locking the lock pin 1 in the locking part 21 in the circumferential direction. The ratchet wheel 4 is coaxially installed with the lock cylinder 3. The lock body 2 is provided with a first elastic member 53 for making the pawl 5 contact with the ratchet wheel 4 and an unlocking mechanism 6 for making the pawl 5 separate from the ratchet wheel 4. The pawl 5 is provided with a guide groove 51. The lock body 2 is provided with a limiting pin 7 and a second elastic member 72 for pushing the limiting pin 7 to move along the guide groove 51 to make the pawl 5 separate from the ratchet wheel 4. The limiting pin 7 is provided with a reset part 71 for contacting with the lock cylinder tooth 31 to realize reset.

[0025] The locking device of the embodiment controls the rotation of the lock cylinder 3 by using the ratchet wheel and pawl mechanism. Since the ratchet wheel 4 has the characteristic of one-way rotation, the lock pin 1 can be clamped into the locking part 21 along the rotation direction of the ratchet wheel 4 under the action of external force or by using the relative movement with the lock body 2, and then the lock pin 1 is reliably locked in the locking part 21 by the lock cylinder tooth 31. Only after the pawl 5 is separated from the ratchet wheel 4 by the action of the unlocking mechanism 6, the lock pin 1 can drive the ratchet wheel 4 to rotate reversely and separate from the locking part 21. The structure is simple and effective, the degree of automation is high, the demand in the unmanned logistics scene can be met, and after unlocking, whether the pawl 5 is reset or not, the next locking action can be directly performed without detection and confirmation. The lock pin 1 will not have rigid collision with the lock cylinder tooth 31 (the lock cylinder tooth 31 can rotate to release force when subjected to the force of the lock pin 1), the use is more convenient, and the reliability is better. For details, see Figure 4 and Figure 5, the limiting pin 7 is located at the rightmost side of the guide groove 51, and the second elastic member 72 is in a force storage state. Specifically referring to Figure 6 , the unlocking mechanism 6 acts to rotate the pawl 5 clockwise to separate from the ratchet wheel 4, the pawl 5 no longer restricts the rotation of the ratchet wheel 4, and the unlocking is realized. At the same time, the limiting pin 7 moves to the leftmost side of the guide groove 51 under the elastic force of the second elastic member 72, which can prevent the pawl 5 from rotating counterclockwise to contact the ratchet wheel 4, so that the pawl 5 and the ratchet wheel 4 remain separated to avoid premature locking. After unlocking, the lock pin 1 can move upward to separate from the lock body 2, and at the same time, the lock pin 1 drives the lock cylinder 3 and the ratchet wheel 4 to rotate clockwise through the lock cylinder teeth 31. When the lock cylinder teeth 31 contact the reset part 71 on the limiting pin 7, the limiting pin 7 is pressed to move to the rightmost side of the guide groove 51, and the reset is realized. At this time, the pawl 5 can rotate counterclockwise to reset to contact the ratchet wheel 4 again. The structure is ingenious and effective, and the reliability of the locking device is further improved. Preferably, when the limiting pin 7 is at the rightmost side of the guide groove 51, the lock cylinder teeth 31 are tangent to the reset part 71.

[0026] As a preferred embodiment, the ratchet wheel 4 is provided with two, the lock cylinder 3 is located between the two ratchet wheels 4, and the pawl 5 is also provided with two and arranged one-to-one corresponding to the two ratchet wheels 4. The two ratchet wheels 4 jointly restrict the rotation of the lock cylinder 3, which can provide greater locking force for the lock pin 1, further improve the safety and reliability, and the balance of force is better.

[0027] Further, in the embodiment, the two ends of the limiting pin 7 are located in the guide grooves 51 of the two pawls 5 respectively, and the reset part 71 is a flange arranged on the outer periphery of the limiting pin 7, which is located between the two pawls 5. The flange on the outer periphery of the limiting pin 7 cooperates with the lock cylinder teeth 31, which is conducive to making the action of the limiting pin 7 and the lock cylinder 3 more smooth and avoiding jamming; the flange is located between the two pawls 5, which is conducive to ensuring the balance of force of the limiting pin 7.

[0028] Further, in the embodiment, a first connecting pin 52 is arranged between the two pawls 5, thereby connecting the two pawls 5 into a whole and synchronously acting, a connecting part 22 is arranged on the lock body 2, and the first elastic member 53 is a tension spring, one end of which is connected with the connecting part 22 and the other end of which is connected with the first connecting pin 52. When the pawl 5 rotates clockwise to separate from the ratchet wheel 4, the first elastic member 53 is in a force storage state; after the limiting pin 7 moves to the rightmost side of the guide groove 51 to reset, the elastic force of the first elastic member 53 is transmitted to the pawl 5 through the first connecting pin 52, thereby driving the pawl 5 to rotate counterclockwise to reset. The structure is simple and reliable.

[0029] Further, in the embodiment, the second elastic member 72 is a torsion spring, the lock body 2 is provided with an abutting portion 23, one torsion arm of the torsion spring abuts against the limiting pin 7, and the other torsion arm abuts against the abutting portion 23. In the locked state, the limiting pin 7 is located at the rightmost side of the guide groove 51, and the second elastic member 72 is in a force storage state. When the unlocking mechanism 6 is actuated, the limiting pin 7 is moved to the leftmost side of the guide groove 51 under the elastic force of the second elastic member 72, thereby ensuring smooth movement.

[0030] As a preferred embodiment, the guide groove 51 is a V-shaped groove, which cooperates with the second elastic member 72 and the lock cylinder teeth 31 to guide the limiting pin 7 to accurately reach the set position, and the structure is simple and reasonable.

[0031] Further, in the embodiment, the lock cylinder 3 is provided with a plurality of lock cylinders which are connected as a whole by the second connecting pin 32. Compared with the single lock cylinder 3, the plurality of lock cylinders 3 are connected as a whole by the second connecting pin 32, thereby forming a thickened design. After the locking pin 1 is locked, the contact area between the lock cylinder 3 and the locking pin 1 is increased, the coaxiality is improved, and the shaking and jamming are reduced.

[0032] As a preferred embodiment, the unlocking mechanism 6 includes a swing arm 61 coaxially installed with the pawl 5 and an unlocking driving member 62 for driving the swing arm 61 to rotate. When unlocking is needed, the unlocking driving member 62 drives the swing arm 61 to rotate clockwise, and the pawl 5 rotates synchronously with the swing arm 61 to separate from the ratchet wheel 4, and the structure is simple and effective. Since the pawl 5 is provided with two pawls, the swing arm 61 is preferably arranged between the two pawls 5, which is beneficial to ensure force balance. The two pawls 5 and the swing arm 61 can be connected as a whole by a plurality of connecting pins to realize synchronous rotation.

[0033] As a preferred embodiment, the unlocking driving member 62 is of a telescopic structure. The unlocking driving member 62 preferably adopts an electric push rod. When unlocking is needed, the electric push rod is extended to push the swing arm 61 to rotate clockwise. Of course, in other embodiments, the unlocking driving member 62 can also adopt a hydraulic cylinder or an air cylinder.

[0034] As a preferred embodiment, the locking portion 21 is a V-shaped locking groove. The V-shaped locking groove is used to guide the locking pin 1 to accurately reach the locking position, and the structure is simple and effective.

[0035] The working principle of the locking device is as follows:

[0036] Locking: The locking pin 1 is clamped into the locking portion 21 by external force or relative movement with the lock body 2. When the locking pin 1 contacts with the lock cylinder teeth 31, the lock cylinder 3 and the ratchet wheel 4 are driven to rotate counterclockwise, and the pawl 5 slides into the next ratchet wheel 4 tooth, thereby completing the locking. At this time, since the ratchet wheel 4 and the lock cylinder 3 cannot rotate clockwise, the locking pin 1 cannot move upward to escape from the lock body 2, and the locking is very reliable.

[0037] Unlocking: the electric push rod extends, the swing arm 61 rotates clockwise, the pawl 5 rotates clockwise with the swing arm 61 and is separated from the ratchet wheel 4, no longer restricting the rotation of the ratchet wheel 4, realizing unlocking, at the same time, the limit pin 7 moves to the leftmost side of the guide groove 51 under the elastic force of the second elastic element 72, which can prevent the pawl 5 from rotating counterclockwise and resetting in advance and contacting the ratchet wheel 4. After unlocking, the locking pin 1 can move upward and come out of the lock body 2, and at the same time, the locking pin 1 drives the lock core 3 and the ratchet wheel 4 to rotate clockwise through the lock core teeth 31, when the lock core teeth 31 contact the reset part 71 on the limit pin 7, the reset part 71 is extruded, and the limit pin 7 moves to the rightmost side of the guide groove 51, realizing resetting, at this time, the elastic force of the first elastic element 53 is transmitted to the pawl 5 through the first connecting pin 52, thereby driving the pawl 5 to rotate counterclockwise and reset, and again restricting the clockwise rotation of the ratchet wheel 4.

[0038] The application scenario of the locking device is as follows:

[0039] I. The locking pin 1 is installed on the towing vehicle, and the lock body 2 is installed on the tray, the dolly or the transfer box, when the tray carrying unit moves, it can accurately hit the locking pin 1 to realize locking. When unlocking, the tray carrying unit supplies power to the electric push rod in the lock body 2, which can drive the pawl 5 to separate from the ratchet wheel 4 and realize unlocking.

[0040] II. The locking pin 1 is installed on the wall or the ground, and the lock body 2 is installed on the tray, the dolly or the transfer box, and the corresponding working process is the same as that in the application scenario I, which will not be repeated here.

[0041] III. The locking pin 1 is installed on the front side of the tray carrying unit, and the lock body 2 is installed on the rear side, which can realize the connection between two trays, and so on, so that multiple trays can be reliably connected into a row.

[0042] Although the present application has been disclosed with the preferred embodiments as above, it is not intended to limit the present application. Any skilled person in the art can make many possible changes and modifications to the technical solutions of the present application, or modify equivalent embodiments with equivalent changes, without departing from the scope of the technical solutions of the present application, by using the disclosed technical content. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application shall fall within the scope of protection of the technical solutions of the present application.

Claims

1. A locking device comprising a locking bolt (1) and a lock body (2), characterized in that: The lock body (2) is provided with a locking portion (21), a lock cylinder (3), a ratchet wheel (4) and a pawl (5), the lock cylinder (3) is provided with a plurality of lock cylinder teeth (31) for locking the lock pin (1) to the locking portion (21) in the circumferential direction, the ratchet wheel (4) is coaxially installed with the lock cylinder (3), the lock body (2) is provided with a first elastic member (53) for enabling the pawl (5) to contact the ratchet wheel (4) and an unlocking mechanism (6) for enabling the pawl (5) to separate from the ratchet wheel (4), the pawl (5) is provided with a guide groove (51), the lock body (2) is provided with a limiting pin (7) and a second elastic member (72) for pushing the limiting pin (7) to move along the guide groove (51) to enable the pawl (5) to keep separated from the ratchet wheel (4), the limiting pin (7) is provided with a reset portion (71) for contacting the lock cylinder tooth (31) to realize reset.

2. The locking device of claim 1, wherein: The ratchet wheel (4) is provided with two, the lock cylinder (3) is located between the two ratchet wheels (4), and the pawl (5) is also provided with two and is arranged one by one corresponding to the two ratchet wheels (4).

3. The locking device of claim 2, wherein: The two ends of the limiting pin (7) are located in the guide grooves (51) of the two pawls (5) respectively, and the reset portion (71) is a flange provided on the outer periphery of the limiting pin (7), and the flange is located between the two pawls (5).

4. The locking device of claim 3, wherein: A first connecting pin (52) is arranged between the two pawls (5), the lock body (2) is provided with a connecting portion (22), the first elastic member (53) is a tension spring, one end of the tension spring is connected with the connecting portion (22), and the other end is connected with the first connecting pin (52).

5. The locking device of claim 4, wherein: The second elastic member (72) is a torsion spring, the lock body (2) is provided with an abutting portion (23), one torsion arm of the torsion spring abuts against the limiting pin (7), and the other torsion arm abuts against the abutting portion (23).

6. The locking device of claim 1, wherein: The guide groove (51) is a V-shaped groove.

7. The locking device of claim 1, wherein: The lock cylinder (3) is provided with a plurality of and is connected as a whole through a second connecting pin (32).

8. The locking device according to any one of claims 1 to 7, characterized in that: The unlocking mechanism (6) comprises a swing arm (61) coaxially installed with the pawl (5) and an unlocking driving member (62) for driving the swing arm (61) to rotate.

9. The locking device of claim 8, wherein: The unlocking driving member (62) is of a telescopic structure.

10. The locking device according to any one of claims 1 to 7, characterized in that: The locking portion (21) is a V-shaped locking groove.

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