CN220645568U - Locking device with emergency unlocking hole - Google Patents

Abstract

The utility model provides a locking device with an emergency unlocking hole, which relates to the technical field of locking equipment and comprises a clamping hook assembly and a locking assembly, wherein the clamping hook assembly comprises a telescopic clamping hook, a fixed clamping hook and a telescopic structure, and the telescopic clamping hook and the fixed clamping hook are connected to the telescopic structure; the locking assembly comprises a locking structure, a hand wheel, a lock cylinder outer cover and a sign pad pasting, wherein the locking structure is connected to the telescopic structure, the hand wheel is rotatably connected to the locking structure, the hand wheel can lock or release the telescopic structure in the rotating process, the locking structure comprises a lock cylinder, the lock cylinder outer cover is provided with a lock hole corresponding to the lock cylinder and a standby lock hole, and the sign pad pasting covers the standby lock hole and is provided with a cutting seam corresponding to the position of the standby lock hole. The position on the identification film corresponding to the standby lock hole is provided with a cutting seam, so that sand and dust can be prevented from entering the hand wheel, and emergency unlocking can be realized without using an additional tool under the emergency condition that the normal lock hole is blocked, and the device is simple in structure and convenient to operate.

Description

Locking device with emergency unlocking hole

Technical Field

The utility model relates to the technical field of locking equipment, in particular to a locking device with an emergency unlocking hole.

Background

The train tail device is a special transportation safety device developed for improving the safety of railway transportation, can be arranged at the tail part of a train, and can improve the safety of railway transportation under the condition that the cargo train is in a non-guard condition at the tail part. Before each train departure, an operator locks the train tail device at the tail part of the train, and after the train arrives at the transit station, the operator can replace the train tail device in time.

In actual use, the train tail device needs to be fixed at the tail of a train by means of the locking device, and because the use scene of the locking device is relatively bad, a key hole of the locking device possibly enters sundries such as sand dust to influence unlocking, so that the train tail device can be quickly replaced in a short time, and the locking device needs to be provided with a corresponding emergency unlocking structure so as to meet the requirement that the train tail device can be quickly picked and hung when a main unlocking hole fails.

The existing partial locking device is provided with a standby unlocking hole, however, the standby unlocking hole of the existing locking device is covered by the lock cylinder outer cover, the standby unlocking hole can not be quickly unlocked under emergency conditions only by disassembling the lock cylinder outer cover by means of tools such as a screwdriver. In addition, under normal conditions, after the operator uses the key to unlock, the key is easy to fall off from the key hole in the unlocking process, and the operation efficiency is affected. Meanwhile, as the train usually runs in the open field and is usually parked and grouped in various factories and mines, sundries such as sand dust and the like easily enter the key holes to cause key hole blockage, and normal unlocking is affected.

Disclosure of Invention

The utility model provides a locking device with an emergency unlocking hole, which is used for solving the defect that the emergency unlocking hole of the locking device cannot be quickly opened under the emergency condition in the prior art.

The utility model provides a locking device with an emergency unlocking hole, which comprises:

the clamping hook assembly comprises a telescopic clamping hook, a fixed clamping hook and a telescopic structure, wherein the telescopic clamping hook and the fixed clamping hook are connected to the telescopic structure, a clamping space for clamping a train tail coupler is formed between the telescopic clamping hook and the fixed clamping hook, and the telescopic structure can drive the telescopic clamping hook and the fixed clamping hook to move relatively;

the locking assembly comprises a locking structure, a hand wheel, a lock cylinder outer cover and a mark film, wherein the locking structure is connected to the telescopic structure, the hand wheel is rotatably connected to the locking structure, the hand wheel can drive the locking structure to rotate forward or reversely, and the telescopic structure can be locked or released when the locking structure rotates forward or reversely;

the locking structure comprises a lock cylinder, the lock cylinder is coaxially and rotatably installed in the hand wheel, the lock cylinder is connected to the telescopic structure, when the lock cylinder is rotated to a locking state, the telescopic structure can only shrink towards the locking direction, when the lock cylinder is rotated to an unlocking state, the telescopic structure can shrink towards the locking direction or stretch towards the releasing direction, the lock cylinder outer cover is connected to the hand wheel, the lock cylinder outer cover is located at one side of the lock cylinder, which is away from the telescopic structure, the lock cylinder outer cover is provided with a lock hole and a standby lock hole, which correspond to the lock cylinder, the identification film is attached to one side of the lock cylinder outer cover, which is away from the lock cylinder, and the position of the identification film, which corresponds to the standby lock hole, is provided with a cutting joint.

According to the locking device with the emergency unlocking hole, the telescopic structure comprises a telescopic sleeve, a shaft sleeve and a screw rod, the telescopic clamping hooks are connected to the telescopic end of the telescopic sleeve, the screw rod is inserted into the connecting end of the telescopic sleeve in a threaded connection mode, the connecting end of the telescopic sleeve is inserted into the shaft sleeve in a movable mode, and the fixed clamping hooks are connected to the shaft sleeve and are opposite to the telescopic clamping hooks.

According to the locking device with the emergency unlocking hole, the locking structure further comprises an inner ratchet, a pawl and an elastic element, the inner ratchet is fixedly connected to one end, far away from the telescopic clamping hook, of the shaft sleeve, a T-shaped groove is formed in one end, far away from the telescopic clamping hook, of the screw rod, the pawl and the elastic element are both placed in the T-shaped groove, the elastic element is arranged between the outer wall of the pawl and the side wall of the T-shaped groove, teeth of the pawl are opposite to tooth grooves on the inner ratchet, the pawl can slide along the direction pointing to or deviating from the tooth grooves of the inner ratchet, so that the pawl is meshed with or released from the inner ratchet, the pawl is provided with a groove, and the lock cylinder is placed in the groove.

According to the locking device with the emergency unlocking hole, the hand wheel is sleeved outside the inner ratchet wheel, the hand wheel is connected with the screw rod through the synchronous pin, the locking hole transversely penetrates through the lock cylinder outer cover to correspond to the lock cylinder in position, and the standby locking hole transversely penetrates through the lock cylinder outer cover to be close to the tooth of the pawl in position.

According to the locking device with the emergency unlocking hole, the boss protruding towards the standby locking hole is arranged at the position, close to the teeth, of the pawl, and after a key is inserted into the standby locking hole, the key can pull out the boss to enable the pawl to be separated from the inner ratchet wheel.

According to the locking device with the emergency unlocking hole, the bearing surface which is abutted against the lock cylinder is formed on the inner wall of the groove, the lock cylinder can move to the second end of the bearing surface along the first end of the bearing surface in the process of rotating from the locking position to the unlocking position, a peak part which protrudes towards the lock cylinder is arranged between the first end and the second end of the bearing surface, and the lock cylinder needs to pass through the peak part when sliding along the bearing surface in the process of switching between the unlocking state and the locking state.

According to the locking device with the emergency unlocking hole, the locking assembly further comprises the lock cylinder baffle and the elastic reset piece, the lock cylinder baffle is arranged on one side, facing the lock hole, of the lock cylinder and covers the lock hole, and the elastic reset piece is sleeved on the periphery of the lock cylinder and applies elastic acting force to the elastic reset piece so that the lock cylinder baffle seals the lock hole.

According to the locking device with the emergency unlocking hole, the lock cylinder housing is opposite to the lock cylinder, a blind groove used for limiting a key is formed in one end, facing the lock cylinder, of the lock cylinder housing, the blind groove is connected to the locking hole, and the blind groove and the locking hole are approximately in a cross structure.

According to the locking device with the emergency unlocking hole, the lock cylinder is provided with the engagement groove for engaging a key on one side facing the locking hole, and the lock cylinder baffle is provided with the engagement part which is positioned in the engagement groove.

According to the locking device with the emergency unlocking hole, the lock cylinder baffle is provided with the outwards protruding clamping part towards one side of the lock cylinder outer cover, the lock cylinder outer cover is provided with the first positioning hole and the second positioning hole, the clamping part can be inserted into the first positioning hole when the lock cylinder is located at the locking position, and the clamping part can be inserted into the second positioning hole when the lock cylinder is located at the unlocking position.

The locking device provided by the utility model comprises the clamping hook component and the locking component, wherein the clamping hook component is used for clamping the coupler at the tail part of the train, the locking component can be fixed or moved to release the clamping hook component, in the locking component, the mark film can cover the standby lock hole, and the position, corresponding to the standby lock hole, on the mark film is provided with a cutting seam, so that sand and dust can be prevented from entering the hand wheel, and the emergency unlocking can be realized without using an additional tool under the emergency condition that the normal lock hole is blocked.

Drawings

In order to more clearly illustrate the utility model or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a locking device with an emergency unlocking hole according to one embodiment of the present utility model;

FIG. 2 is a schematic view of the locking device of FIG. 1 from a further perspective;

FIG. 3 is a cross-sectional view taken along the direction A-A in FIG. 1;

FIG. 4 is a cross-sectional view taken along B-B in FIG. 2, with the lock cylinder in a locked position;

FIG. 5 is a cross-sectional view taken along B-B in FIG. 2, with the lock cylinder in an unlocked position;

FIG. 6 is a cross-sectional view taken along the direction B-B in FIG. 2, with a key inserted into the spare key hole;

FIG. 7 is a schematic view of the installation of a hand wheel in the locking device shown in FIG. 1;

FIG. 8 is a schematic view of the cylinder housing in the hand wheel of the locking device shown in FIG. 1;

FIG. 9 is a schematic diagram of the structure of a key in one embodiment according to the utility model;

FIG. 10 is a schematic view of the pawl in the locking device shown in FIG. 1;

FIG. 11 is a schematic view of the structure of the lock cylinder in the locking device shown in FIG. 1;

FIG. 12 is a schematic view of the lock cylinder block of the locking device shown in FIG. 1;

FIG. 13 is a schematic view of the end face of the hand wheel of the locking device of FIG. 1 with a key inserted into the locking aperture in a locked position;

FIG. 14 is a cross-sectional view taken along the direction C-C in FIG. 13;

FIG. 15 is a schematic view of the end face of the hand wheel of the locking device of FIG. 1 with a key inserted into the locking aperture in an unlocked position;

fig. 16 is a sectional view taken along the direction D-D in fig. 15.

Reference numerals:

1. a telescopic clamping hook; 2. fixing the clamping hook; 3. a telescoping tube; 4. a shaft sleeve; 5. a screw; 6. a rotation stopping key; 7. a hand wheel; 8. Labeling a film; 9. a lock core; 10. A lock hole; 11. A standby lock hole; 12. An inner ratchet; 13. a pawl; 14. an elastic element; 15. a bolt; 16. A boss; 17. A peak; 18. a lock cylinder baffle; 19. an elastic reset piece; 20. a blind groove; 21. a joint; 22. a clamping part; 23. a first positioning hole; 24. a second positioning hole; 25. a synchronizing pin; 26. a snap spring retainer ring; 27. a key; 28. a rotating seat; 29. and a lock cylinder outer cover.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In one embodiment according to the present utility model, a locking device with an emergency unlocking hole is provided, the locking device comprising a hook assembly for hooking an end coupler of a train and a locking assembly that can be fixed or moved to release the hook assembly. Hereinafter, the locking device in this embodiment will be further described with reference to fig. 1 to 16.

As shown in fig. 1 to 4, the locking device with an emergency unlocking hole in the present embodiment includes a hook assembly and a locking assembly.

The clamping hook assembly comprises a telescopic clamping hook 1, a fixed clamping hook 2 and a telescopic structure, wherein the telescopic clamping hook 1 and the fixed clamping hook 2 are connected to the telescopic structure, a clamping space for clamping a train tail coupler is formed between the telescopic clamping hook 1 and the fixed clamping hook 2, and the telescopic structure can drive the telescopic clamping hook 1 and the fixed clamping hook 2 to move relatively.

Illustratively, as shown in fig. 3, the telescopic structure includes a telescopic tube 3, a shaft sleeve 4, and a screw 5, the telescopic hook 1 is connected to a telescopic end of the telescopic tube 3, the screw 5 is inserted in a threaded connection manner in a connection end of the telescopic tube 3, the connection end of the telescopic tube 3 is movably inserted in the shaft sleeve 4, and the fixed hook 2 is connected to the shaft sleeve 4 and is disposed opposite to the telescopic hook 1.

It can be understood that in this embodiment, the telescopic hook 1 and the fixed hook 2 are both configured as hook structures and are disposed opposite to each other, and the telescopic hook 1 and the fixed hook 2 are close to each other and then can hook the coupler at the tail of the train.

The telescopic tube 3 is constructed as a tubular structure with one end being open, one end with an opening is a connecting end, the other end is a telescopic end, and the tail end of the telescopic hook 1 can be fixedly connected to the telescopic end of the telescopic tube 3 in a welding, screwing or riveting mode. The inner wall of the telescopic tube 3 is formed with an internal thread structure, the outer wall of the screw 5 is provided with an external thread structure, one end of the screw 5 can be inserted into the telescopic tube 3 through the opening of the telescopic tube 3, and the internal thread structure of the telescopic tube 3 is meshed with the external thread structure of the screw 5.

The telescopic tube 3 is provided with an open connecting end inserted into the shaft sleeve 4, the telescopic tube 3 can move along the axial direction of the shaft sleeve 4, a groove extending along the axial direction of the telescopic tube is formed in the outer wall of the telescopic tube 3 for preventing the telescopic tube 3 from rotating relative to the shaft sleeve 4, a rotation stopping key 6 is fixedly arranged on the inner wall of the shaft sleeve 4, the rotation stopping key 6 is convexly arranged in the groove of the telescopic tube 3, and the rotation stopping key 6 can move in the groove of the telescopic tube 3 in the process of rotating the screw 5 to drive the telescopic tube 3 to enable the telescopic end of the telescopic tube 3 to extend or retract relative to the shaft sleeve 4.

Furthermore, the tail end of the fixing hook 2 may be fixedly connected to the sleeve 4 by welding, screwing or riveting. Thereby, during the extension or retraction of the telescopic tube 3 relative to the sleeve 4, the telescopic hook 1 and the fixed hook 2 can be moved closer to or further away from each other, thereby allowing the locking device to be fixed to or removed from the end of the train.

Further, as shown in fig. 3 and 7, the locking assembly includes a locking structure, a hand wheel 7, a lock cylinder housing 29 and a label film 8, the locking structure is connected to the telescopic structure, the hand wheel 7 is rotatably connected to the locking structure, the hand wheel 7 can lock or release the telescopic structure in the rotating process, for example, the hand wheel 7 can drive the locking structure to rotate forward or reverse, and the locking structure can lock or release the telescopic structure when rotating forward or reverse.

The locking structure comprises a lock cylinder 9, the lock cylinder 9 is coaxially and rotatably arranged in the hand wheel 7, the lock cylinder 9 is connected to the telescopic structure, when the lock cylinder 9 rotates to a locking state, the locking structure can only rotate forward and lock the telescopic structure, the telescopic structure can only shrink towards the locking direction, when the lock cylinder 9 rotates to an unlocking state, the locking structure can not only rotate forward to lock the telescopic structure, but also rotate reversely to release the telescopic structure, and the telescopic structure can extend towards the releasing direction. The lock cylinder housing 29 is connected to the hand wheel 7, the lock cylinder housing 29 is located on the side of the lock cylinder 9 facing away from the telescopic structure, and the lock cylinder housing 29 is provided with a lock hole 10 and a spare lock hole 11 corresponding to the lock cylinder 9. The identification film 8 is attached to the side of the cylinder housing 29 facing away from the cylinder 9, the identification film 8 covers the spare lock hole 11, and a slit is provided at a position of the identification film 8 corresponding to the spare lock hole 11.

In this embodiment, the locking structure can be connected to the telescopic structure, and the lock cylinder 9 in the locking structure can control the locking state of the telescopic structure, i.e., the lock cylinder 9 can control the locking state of the screw 5.

Specifically, as shown in fig. 3 to 6, the locking structure further includes an inner ratchet 12, a pawl 13 and an elastic element 14, the inner ratchet 12 is fixedly connected to one end of the sleeve 4 away from the telescopic hook 1, one end of the screw 5 away from the telescopic hook 1 is provided with a T-shaped groove, the pawl 13 and the elastic element 14 are both placed in the T-shaped groove, the elastic element 14 is arranged between the outer wall of the pawl 13 and the side wall of the T-shaped groove, teeth of the pawl 13 are opposite to tooth grooves on the inner ratchet 12, and the pawl 13 can slide along a direction approaching or departing from the tooth grooves of the inner ratchet 12 so as to enable the pawl 13 to be meshed with or released from the inner ratchet 12. The pawl 13 has a recess and the lock cylinder 9 is placed in the recess.

Illustratively, as shown in fig. 3, the inner ratchet 12 is fixedly connected to an end of the sleeve 4 remote from the telescopic hook 1. The inner ratchet 12 and the sleeve 4 may be integrally formed.

The end of the screw 5 away from the telescopic hook 1 may be matched with the size of the inner ratchet 12, for example, a flange is provided at the end of the screw 5 away from the telescopic hook 1, the flange is provided at the inner side of the inner ratchet 12, and the outer diameter of the flange is slightly smaller than the inner diameter of the inner ratchet 12, i.e. the outer peripheral surface of the flange is close to teeth of the inner ratchet 12. The flange may be integrally formed with the screw 5, that is, the other end of the screw 5 may be formed in a flange shape, and the outer surface of the flange may be brought into close contact with the teeth of the inner ratchet 12.

The other end of the screw 5 is provided with a T-shaped groove, which may be provided in the radial direction of the flange, and one end of which penetrates the outer periphery of the flange, as shown in fig. 4 to 6, for example. The T-shaped groove is provided with a first wall surface, a second wall surface and a third wall surface which are connected in sequence, and the first wall surface and the third wall surface are parallel and oppositely arranged.

A pawl 13 is slidably disposed in the T-shaped slot, and two ends of the pawl 13 are respectively limited between the first wall surface and the third wall surface. The side of the pawl 13 facing the first wall is provided with a recess for receiving the lock cylinder 9. Optionally, the recess is provided in a central position of the pawl 13.

The elastic member 14 is provided between the second wall surface and the pawl 13, both ends of the elastic member 14 are respectively abutted to the second wall surface and the pawl 13, and can apply a driving force to the pawl 13 to move it toward the inner ratchet 12, and teeth of the pawl 13 are provided on a side away from the second wall surface. Alternatively, the resilient element 14 may be a spring, or other element capable of recovering after compression.

In this embodiment, as shown in fig. 3, one side of the lock cylinder 9 away from the pawl 13 is configured to be in a shape matching with a key, the other side of the lock cylinder 9 facing the pawl 13 is provided with a cam, and the cam portion of the lock cylinder 9 is placed in the groove of the pawl 13, and during the rotation of the lock cylinder 9 in the groove of the pawl 13, the cam of the lock cylinder 9 is in cam follower matching with the side wall of the groove on the pawl 13.

As shown in fig. 4, in the initial locked state, the cam of the lock cylinder 9 contacts the side wall of the groove of the pawl 13, the teeth of the pawl 13 are engaged with the inner ratchet 12, the elastic element 14 is in the unfolded state, the lock cylinder 9 and the pawl 13 are both in the locked position, the worker can only rotate the hand wheel 7 clockwise, the screw 5 can only rotate in one direction, and the distance between the telescopic hook 1 and the fixed hook 2 can only be reduced, but cannot be increased. That is, when the lock core 9 is rotated to the lock closing state, the hand wheel 7 can only drive the locking structure to rotate forward, the telescopic structure can only shrink towards the locking direction, and the telescopic hook 1 and the fixed hook 2 can only approach each other.

Thereafter, the lock cylinder 9 can be shifted by means of the key, shifting the pawl 13 to the unlocking position.

Specifically, as shown in fig. 5, after the key is engaged and the lock cylinder 9 is turned, the cam of the lock cylinder 9 contacts with another position of the groove side wall of the pawl 13, and at this time, the elastic element 14 is in a compressed state, in this unlocking state, both the lock cylinder 9 and the pawl 13 are in an unlocking position, the teeth of the pawl 13 are separated from the inner ratchet 12, the operator can rotate the hand wheel 7 clockwise or counterclockwise as required, the screw 5 can rotate in two directions, and the distance between the telescopic hook 1 and the fixed hook 2 can be increased or decreased. That is, when the lock core 9 is rotated to an unlocking state, the hand wheel 7 can drive the locking structure to rotate forward or reverse, the telescopic structure can shrink in the locking direction or extend in the releasing direction, and the telescopic hook 1 and the fixed hook 2 can be close to each other or far away from each other.

In this embodiment, the staff can be with the help of the position of key adjustment lock core 9, can realize locking fast and open this locking structure, convenient operation, stable in structure can prevent effectively that screw rod 5 from reversing rotation from taking place to loosen under the lock closing state moreover and take place to take off, has improved locking device's reliability and stability.

Alternatively, in order to achieve synchronous rotation of the hand wheel 7 and the screw 5, as shown in fig. 3, a fish eye hole is provided on the side where the hand wheel 7 contacts the screw 5, a blind hole is provided on the side where the screw 5 contacts the hand wheel 7, and a synchronizing pin 25 is inserted into the two holes, whereby the hand wheel 7 and the screw 5 can be rotated synchronously.

In addition, a snap spring retainer ring 26 is arranged between the hand wheel 7 and the shaft sleeve 4, so that the hand wheel 7 can be prevented from falling off from one end of the shaft sleeve 4 with the inner ratchet wheel 12. And the screw 5 can be driven to rotate easily by rotating the hand wheel 7, so that the locking and unlocking functions of the locking device are realized.

During maintenance and disassembly, parts such as the lock cylinder 9, the synchronous pin 25 and the like are scattered, so that the parts are easy to lose, and the maintenance is inconvenient. The hand wheel that this patent relates to is an holistic part, and this part of hand wheel subassembly can be dismantled to pull down jump ring retaining ring 26, spills parts such as screw rod 5, pawl 13, and it is convenient to maintain, and the part of hand wheel part can not scatter, lose. And convenience in maintenance and replacement is improved.

Further, in the present embodiment, the key cylinder housing 29 is provided with the lock hole 10 and the spare lock hole 11 as shown in fig. 7 and 8 for convenience in opening the locking structure under normal and emergency conditions.

Specifically, as shown in fig. 7, 8 and 14, the hand wheel 7 includes a cylindrical rotary seat 28, a cylinder housing 29 is provided in the rotary seat 28, and the lock hole 10 and the spare lock hole 11 are provided on the cylinder housing 29.

The lock hole 10 transversely passes through the lock cylinder housing 29 and corresponds to the position on the lock cylinder 9 configured to be matched with the key, under the normal condition that the lock hole 10 is not blocked, a worker can insert the key into the lock hole 10 to be engaged with the lock cylinder 9, and the pawl 13 can be engaged with or disengaged from the inner ratchet 12 by pulling the lock cylinder 9 forward or backward through the key, so that the purpose of controlling the locking or releasing of the locking structure is achieved.

The spare lock hole 11 transversely passes through the lock cylinder housing 29 and is opposite to the tooth position of the pawl 13, the identification film 8 is attached to one side of the hand wheel 7, which is away from the lock cylinder 9, the identification film 8 covers the spare lock hole 11, and a cutting seam is arranged at the position of the identification film 8 corresponding to the spare lock hole 11. Alternatively, the identification patch 8 may be secured to the end face of the handwheel 7 by means of a plurality of bolts 15.

In a normal state, the spare lock hole 11 is covered by the label film 8. When the lock core 9 is fated by dust or cannot be rotated for other unknown reasons, a key can be inserted into the hand wheel 7 from the cutting joint, and then the teeth of the pawl 13 are pulled away from the inner ratchet 12, so that the inner ratchet 12 and the shaft sleeve 4 can be rotated, and unlocking is realized.

Therefore, in the embodiment, through setting up the kerf in the position that corresponds to reserve lockhole 11 on sign pad pasting 8, both can prevent that sand and dust from getting into inside the hand wheel 7, can not only realize the emergent unblanking with the help of the direct key of extra instrument under the emergent condition that normal lockhole 10 blockked up again, simple structure, convenient operation, the effect is obvious.

In the present embodiment, a key is insertable into the lock hole 10 to be engaged with the lock cylinder 9, and fig. 9 shows a conventional key 27, and the front end of the key 27 is provided with two dials which are disposed opposite to each other and are formed in a straight shape on both sides, and the dials are engageable with the lock cylinder 9 to rotate the lock cylinder 9.

In order to allow a key inserted into the spare lock hole 11 to toggle the lock cylinder 9 more effectively, in this embodiment, as shown in fig. 6 and 10, the pawl 13 is provided with a boss 16 protruding toward the spare lock hole 11 near the tooth position, and the boss 16 can abut against the side of the key away from the tooth of the pawl 13 after the key is inserted into the spare lock hole 11. After the key is inserted into the spare lock hole 11, the key can be pulled out of the boss 16 so that the pawl 13 is retracted toward the inside, thereby disengaging from the inner ratchet 12.

In an emergency situation, as shown in fig. 6, when the key 27 shown in fig. 9 is inserted into the hand wheel 7 through the spare lock hole 11, the side of the key 27 away from the teeth of the pawl 13 can abut against the boss 16, and the boss 16 can be shifted, so that the whole pawl 13 moves toward the side away from the inner ratchet 12, the teeth of the pawl 13 are separated from the inner ratchet 12, thereby conveniently rotating the hand wheel 7, the telescopic hook 1 away from the fixed hook 2, and the screw 5 can rotate in two directions, and the whole locking device is released.

In addition, in the existing locking device, the gear sense of the matching position of the lock cylinder 9 for poking the pawl 13 is unclear, the lock cylinder 9 is easy to jump from the unlocking state to the locking state, the practical application effect is poor, and the key is one of reasons for recovering the key from the unlocking state to the locking state.

In this regard, in the present embodiment, as shown in fig. 4, 5 and 10, the inner wall of the recess in the pawl 13 is formed with a receiving surface that abuts against the lock cylinder 9, and the receiving surface may be a second wall surface, and the lock cylinder 9 may be moved along a first end of the receiving surface to a second end of the receiving surface during rotation from the lock position to the unlock position, wherein a peak 17 protruding toward the lock cylinder 9 is provided between the first end and the second end of the receiving surface.

In actual use, when a worker rotates the key to stir the lock cylinder 9 to rotate, the cam of the lock cylinder 9 can abut against and move along the bearing surface of the groove on the pawl 13, and when the cam moves between the first end and the second end, certain resistance can be applied to the rotation of the key due to the existence of the peak 17, so that the worker can feel the existence of the resistance, and more effective feedback can be provided for the worker. And due to the obstruction of the peaks 17, the pawl 13 is less likely to loosen from the unlocked to the locked position even if the entire device is moved.

Through setting up peak 17 in the engaged position that lock core 9 stirred pawl 13, lock core 9 is in the switching process between unlocking and locking two kinds of states, and peak 17 is all needed to be passed over when lock core 9 slides along the face of accepting, can strengthen the gear sense that the staff opened and lock in the switching process, can make the gear sense of unblanking, closing the lock clear, no intermediate state, avoid the position of pawl 13 to appear not hard up simultaneously.

Further, in this embodiment, as shown in fig. 3, the locking assembly further includes a lock cylinder blocking piece 18 and an elastic restoring piece 19, the lock cylinder blocking piece 18 is disposed on a side of the lock cylinder 9 facing the lock hole 10 and covers the lock hole 10, and the elastic restoring piece 19 is sleeved on the periphery of the lock cylinder 9 and applies elastic force to the lock cylinder blocking piece 18 so that the lock cylinder blocking piece 18 closes the lock hole 10.

As shown in fig. 11, the lock cylinder 9 is provided with an outwardly protruding flange in its circumferential direction, on both sides of which the shape of the lock cylinder 9 to be fitted with a key and the cams to be engaged with a ratchet are located, respectively. The elastic restoring member 19 is configured as a spring, which is sleeved on the periphery of the key matching shape, one end of the elastic restoring member 19 is abutted to the flange, the other end is abutted to the lock cylinder blocking piece 18, and the elastic restoring member 19 applies elastic acting force to the lock cylinder blocking piece 18, so that the lock cylinder blocking piece 18 is abutted to the inner wall of the hand wheel 7 and closes the lock hole 10.

Therefore, under the elastic action of the elastic reset piece 19, the lock cylinder baffle 18 can seal the lock hole 10, so that foreign matters such as outside sand wind and the like are prevented from entering the lock hole 10, and when unlocking is needed, a worker can directly insert a key into the lock hole 10 to jack the lock cylinder baffle 18 to realize unlocking.

In practical use, the key needs to be continuously inserted into the lock hole 10 to conveniently rotate the hand wheel 7 to unlock, however, the key is easy to fall off from the lock hole 10, and the working efficiency is affected. In contrast, in the present embodiment, the cylinder housing 29 is opposed to the cylinder 9, and as shown in fig. 8, the end of the cylinder housing 29 facing the cylinder 9 is further provided with a blind groove 20 for restricting a key, the blind groove 20 is connected to the lock hole 10, and the blind groove 20 and the lock hole 10 are formed in a substantially cross-shaped structure.

When the key is inserted into the lock hole 10 and rotated to the unlocking position, the key gradually drops out under the action of the elastic reset piece 19 and the lock cylinder blocking piece 18, and at this time, since the blind groove 20 is arranged on the inner side of the lock cylinder housing 29, the key is blocked in the blind groove 20, and neither rotates relative to the hand wheel 7 nor drops out. If the key is to be removed, the key may be pushed directly to the inside of the hand wheel 7 and then turned back to the lock position, and then removed from the lock hole 10.

Further, in order to facilitate the mating connection between the lock cylinder 9 and the key, in this embodiment, as shown in fig. 11, an engagement groove for engaging the key is provided on a side of the lock cylinder 9 facing the lock hole 10, and as shown in fig. 12, the lock cylinder stopper 18 has an engagement portion 21, and the engagement portion 21 of the lock cylinder stopper 18 can be placed in the engagement groove of the lock cylinder 9.

Thus, when the key is inserted into the lock hole 10 and the key blade 18 is pushed open, the engaging portion 21 of the key blade 18 can enter the engaging groove of the key cylinder 9 together with the two turning blocks at the front end of the key, whereby the key blade 18 can be turned in synchronization with the key.

Alternatively, as shown in fig. 12, the lock cylinder blocking piece 18 is provided with an outwardly protruding clamping portion 22 toward one side of the lock cylinder housing 29, and as shown in fig. 8, the lock cylinder housing 29 is provided with a first positioning hole 23 and a second positioning hole 24, the clamping portion 22 can be inserted into the first positioning hole 23 when the lock cylinder 9 is in the lock-closing position, and the clamping portion 22 can be inserted into the second positioning hole 24 when the lock cylinder 9 is in the unlock position.

In actual use, when the lock cylinder 9 is located at the lock closing position, the lock cylinder blocking piece 18 abuts against the inner wall of the lock cylinder housing 29 under the elastic force of the elastic reset piece 19 and can close the lock hole 10, meanwhile, the clamping portion 22 of the lock cylinder blocking piece 18 is inserted into the first positioning hole 23, at this time, the position of the lock cylinder 9 cannot be changed, and foreign matters such as external sand and stone cannot enter the hand wheel through the lock hole 10.

When the locking device needs to be unlocked, as shown in fig. 13 and 14, a worker can insert a key 27 into the lock hole 10, the key 27 can push the lock cylinder stopper 18 open, and push the engagement portion 21 of the lock cylinder stopper 18 into the engagement groove of the lock cylinder 9 together, and at this time, the engagement portion 22 of the lock cylinder stopper 18 will leave the first positioning hole 23.

Thereafter, the key 27 is turned so that the lock cylinder 9 is in the unlocking position. As shown in fig. 15 and 16, after the operator releases the key 27, under the action of the elastic restoring member 19, the key 27 enters the blind groove 20 inside the lock cylinder housing 29, and the clamping portion 22 of the lock cylinder blocking piece 18 enters the second positioning hole 24, and at this time, the positions of the lock cylinder 9 and the key 27 are defined.

Thus, the locking device with the emergency unlocking hole in the present embodiment has the following advantages:

the locking device in this embodiment includes pothook subassembly and locking subassembly, and the pothook subassembly is used for the tight train afterbody coupling of hook, and locking subassembly then can fix or remove and loosen the pothook subassembly, in locking subassembly, the sign pad pasting can cover reserve lockhole, and the position that corresponds to reserve lockhole on the sign pad pasting sets up the joint cutting moreover, both can prevent sand and dust entering hand wheel inside, can not use the key to realize the emergent unblanking with the help of extra instrument directness under the emergent condition that normal lockhole blockked up again, simple structure, convenient operation, the effect is obvious.

The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present utility model without undue burden.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (10)

1. A locking device with an emergency unlocking hole, comprising:

the clamping hook assembly comprises a telescopic clamping hook, a fixed clamping hook and a telescopic structure, wherein the telescopic clamping hook and the fixed clamping hook are connected to the telescopic structure, a clamping space for clamping a train tail coupler is formed between the telescopic clamping hook and the fixed clamping hook, and the telescopic structure can drive the telescopic clamping hook and the fixed clamping hook to move relatively;

the locking assembly comprises a locking structure, a hand wheel, a lock cylinder outer cover and a mark film, wherein the locking structure is connected to the telescopic structure, the hand wheel is rotatably connected to the locking structure, the hand wheel can drive the locking structure to rotate forward or reversely, and the telescopic structure can be locked or released when the locking structure rotates forward or reversely;

the locking structure comprises a lock cylinder, the lock cylinder is coaxially and rotatably installed in the hand wheel, the lock cylinder is connected to the telescopic structure, when the lock cylinder is rotated to a locking state, the telescopic structure can only shrink towards the locking direction, when the lock cylinder is rotated to an unlocking state, the telescopic structure can shrink towards the locking direction or stretch towards the releasing direction, the lock cylinder outer cover is connected to the hand wheel, the lock cylinder outer cover is located at one side of the lock cylinder, which is away from the telescopic structure, the lock cylinder outer cover is provided with a lock hole and a standby lock hole, which correspond to the lock cylinder, the identification film is attached to one side of the lock cylinder outer cover, which is away from the lock cylinder, and the position of the identification film, which corresponds to the standby lock hole, is provided with a cutting joint.

2. The locking device with an emergency unlocking hole according to claim 1, wherein the telescopic structure comprises a telescopic tube, a shaft sleeve and a screw rod, the telescopic hook is connected to the telescopic end of the telescopic tube, the screw rod is inserted in the connecting end of the telescopic tube in a threaded connection manner, the connecting end of the telescopic tube is inserted in the shaft sleeve in a movable manner, and the fixed hook is connected to the shaft sleeve and is arranged opposite to the telescopic hook.

3. The locking device with an emergency unlocking hole according to claim 2, wherein the locking structure further comprises an inner ratchet wheel, a pawl and an elastic element, the inner ratchet wheel is fixedly connected to one end of the shaft sleeve, which is far away from the telescopic clamping hook, a T-shaped groove is formed in one end of the screw rod, which is far away from the telescopic clamping hook, the pawl and the elastic element are both placed in the T-shaped groove, the elastic element is arranged between the outer wall of the pawl and the side wall of the T-shaped groove, teeth of the pawl are opposite to tooth grooves on the inner ratchet wheel, the pawl can slide along the direction pointing to or departing from the tooth grooves of the inner ratchet wheel so that the pawl is meshed with or released from the inner ratchet wheel, the pawl is provided with a groove, and the lock cylinder is placed in the groove.

4. The locking device with emergency unlocking hole according to claim 3, wherein the hand wheel is sleeved outside the inner ratchet wheel, the hand wheel is connected with the screw rod through a synchronous pin, the locking hole transversely penetrates through the lock cylinder outer cover to correspond to the lock cylinder in position, and the spare locking hole transversely penetrates through the lock cylinder outer cover to be close to teeth of the pawl.

5. The locking device with emergency unlocking hole according to claim 4, wherein the pawl is provided with a boss protruding toward the spare locking hole at a position near the tooth, and after a key is inserted into the spare locking hole, the key can be pulled out of the boss so that the pawl is disengaged from the inner ratchet.

6. The locking device with an emergency unlocking hole according to claim 4, wherein a bearing surface which is abutted against the lock cylinder is formed on the inner wall of the groove, the lock cylinder can move along the first end of the bearing surface to the second end of the bearing surface in the process of rotating from the locking position to the unlocking position, a peak part which protrudes towards the lock cylinder is arranged between the first end and the second end of the bearing surface, and the lock cylinder needs to pass over the peak part when sliding along the bearing surface in the process of switching between the unlocking state and the locking state.

7. The locking device with an emergency unlocking hole according to claim 4, wherein the locking assembly further comprises a lock cylinder blocking piece and an elastic reset piece, the lock cylinder blocking piece is arranged on one side of the lock cylinder, which faces the lock hole, and covers the lock hole, and the elastic reset piece is sleeved on the periphery of the lock cylinder and applies elastic acting force to the elastic reset piece so that the lock cylinder blocking piece seals the lock hole.

8. The locking device with emergency unlocking hole according to claim 7, wherein the lock cylinder housing is opposite to the lock cylinder, a blind groove for limiting a key is further provided at an end of the lock cylinder housing facing the lock cylinder, the blind groove is connected to the lock hole, and the blind groove and the lock hole are formed in a substantially cross-shaped structure.

9. The locking device with emergency unlocking hole according to claim 7, wherein an engagement groove for engaging a key is provided on a side of the lock cylinder facing the locking hole, and the lock cylinder shutter has an engagement portion, the engagement portion being located in the engagement groove.

10. The locking device with an emergency unlocking hole according to claim 9, wherein a side of the lock cylinder blocking piece, which faces the lock cylinder housing, is provided with an outwardly protruding clamping portion, the lock cylinder housing is provided with a first positioning hole and a second positioning hole, the clamping portion can be inserted into the first positioning hole when the lock cylinder is located at the locking position, and the clamping portion can be inserted into the second positioning hole when the lock cylinder is located at the unlocking position.