CN215927081U - Locking device and working machine - Google Patents

Abstract

The utility model provides a locking device and a working machine, comprising: the lock core is movably inserted into the lock shell; the lock comprises a connecting rod and an operating part, wherein the first end of the connecting rod is hinged with the lock shell, the second end of the connecting rod is hinged with the first hinged part of the operating part, and the first end of the lock core is hinged with the second hinged part of the operating part to form a connecting rod mechanism. Wherein the operating portion is switchable between a first dead center position and a second dead center position of the link mechanism. When the operation portion is located at the first dead point position, the key cylinder is in the unlocked state. When the operating portion is located at the second dead point position, the key cylinder is in the locked state. So set up, utilize link mechanism to carry out the unblock of lock core and the switching between the locking state through the operating portion, it is more convenient, laborsaving to operate. And the unlocking state and the locking state are both positioned at the dead point position of the link mechanism, and the locking reliability is improved by utilizing the dead point principle of the link mechanism.

Description

Locking device and working machine

Technical Field

The utility model relates to the technical field of working machinery, in particular to a locking device and the working machinery.

Background

When the concrete pump truck works, the support legs need to be unfolded, so that the concrete pump truck is supported on the solid ground to prevent the concrete pump truck from tipping. In the running process of the pump truck, the supporting legs need to be folded so as to ensure the safe passing of the pump truck. To prevent the legs from being accidentally unfolded in the folded-in state, the legs need to be locked.

The existing supporting leg locking device mostly adopts a cam structure, and the locking and unlocking states of the lock core are switched, so that the supporting leg is locked and unlocked. And the spring is sleeved on the lock cylinder to realize the automatic reset of the lock cylinder so as to ensure the reliability of locking. However, the spring coefficient of the required spring is large, so that the force required when the locking state and the unlocking state are switched is also large, the switching is laborious, and the operation is inconvenient. And rely on spring force to carry out the locking, the reliability is also relatively poor.

Therefore, how to solve the problems that the locking device of the supporting leg in the prior art is labor-consuming in switching the locking state and the unlocking state, the operation is inconvenient, and the reliability is poor due to the fact that the locking device is locked by the elastic force of the spring becomes an important technical problem to be solved by the technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a locking device and a working machine, which are used for solving the problems in the prior art.

The present invention provides a lock device including:

the lock comprises a lock core and a lock shell, wherein the lock core is movably inserted into the lock shell;

the first end of the connecting rod is hinged with the lock shell, the second end of the connecting rod is hinged with the first hinge joint of the operating part, and the first end of the lock cylinder is hinged with the second hinge joint of the operating part to form a connecting rod mechanism;

wherein the operating portion is switchable between a first dead center position and a second dead center position of the link mechanism; when the operating part is located at the first dead point position, the lock cylinder is in an unlocking state, and the first hinge joint is closer to the second end of the lock cylinder relative to the second hinge joint along the central shaft direction of the lock cylinder; when the operating part is located at the second dead point position, the lock cylinder is in a locked state, and the second hinge is closer to the second end of the lock cylinder relative to the first hinge along the central axis direction of the lock cylinder; wherein the second end of the lock cylinder is opposite the first end of the lock cylinder.

According to the utility model, the locking device also comprises an elastic piece which is arranged between the lock cylinder and the lock shell,

wherein, in a case where the operating portion is moved from the first dead center position to the second dead center position, an amount of compression of the elastic member is gradually reduced to facilitate the operating portion to move to the second dead center position.

According to the lock device provided by the present invention, when the operation portion continues to move in the direction exceeding the second dead point position, the compression amount of the elastic member gradually increases to prevent the operation portion from continuing to move and to promote the operation portion to return to the second dead point position.

According to the locking device provided by the utility model, the lock cylinder is provided with the first step surface, the lock shell is internally provided with the second step surface, the elastic piece is sleeved on the lock cylinder, one end of the elastic piece abuts against the first step surface, and the other end of the elastic piece abuts against the second step surface.

The locking device provided by the utility model also comprises a limit stop which is arranged on the connecting rod,

when the operating part moves to the first dead point position, the limit stop abuts against the operating part to prevent the operating part from moving in a direction exceeding the first dead point position; and/or the presence of a gas in the gas,

when the operating portion moves to the second dead point position, the limit stopper abuts against the operating portion to prevent the operating portion from continuing to move beyond the second dead point position.

According to the locking device provided by the utility model, the operating part is provided with a first contact surface which is abutted against the limit stop under the condition that the operating part moves to the first dead point position; and/or the presence of a gas in the gas,

the operating part is provided with a second contact surface which is abutted against the limit stop when the operating part moves to the second dead point position.

According to the locking device provided by the utility model, the locking device also comprises a mounting flange arranged on the lock shell.

According to the locking device provided by the utility model, the connecting rod comprises a first rod piece and a second rod piece which are respectively arranged at two sides of the lock shell,

the two ends of the first rod piece are hinged to the lock shell and the operating part respectively, and the two ends of the second rod piece are hinged to the lock shell and the operating part respectively.

According to the lock device provided by the present invention, the operation portion includes:

the handle is provided with the first hinge joint so as to enable the handle to be hinged with the connecting rod;

the connecting boss is convexly arranged on the handle and provided with the second hinge joint so as to enable the connecting boss to be hinged with the lock cylinder;

wherein, in a case where the operating portion is located at the first dead point position, the handle is closer to a second end of the key cylinder with respect to the connecting boss in a central axis direction of the key cylinder; when the operating part is located at the second dead center position, the connecting boss is closer to the second end of the key cylinder relative to the handle in the central axis direction of the key cylinder.

The utility model also provides a working machine, which comprises a vehicle body and a supporting leg arranged on the vehicle body, wherein the supporting leg is provided with the locking device or the vehicle body is provided with the locking device.

The utility model provides a locking device, comprising: the lock core is movably inserted into the lock shell; the lock comprises a connecting rod and an operating part, wherein the first end of the connecting rod is hinged with the lock shell, the second end of the connecting rod is hinged with the first hinged part of the operating part, and the first end of the lock core is hinged with the second hinged part of the operating part to form a connecting rod mechanism. Wherein the operating portion is switchable between a first dead center position and a second dead center position of the link mechanism. When the operating part is located at the first dead point position, the lock cylinder is in an unlocking state, and the first hinge is closer to the second end of the lock cylinder than the second hinge along the central axis direction of the lock cylinder. When the operating part is located at the second dead point position, the lock core is in a locking state, and the second hinge joint is closer to the second end of the lock core than the first hinge joint along the central axis direction of the lock core. So set up, utilize link mechanism to carry out the unblock of lock core and the switching between the locking state through the operating portion, come to carry out the locking to the landing leg, it is more convenient, laborsaving to operate. And the unlocking state and the locking state are both positioned at the dead point position of the link mechanism, and the locking reliability is improved by utilizing the dead point principle of the link mechanism. Thereby the locking means who has solved among the prior art landing leg is comparatively hard when locking and unblock state switch, and the operation is inconvenient to and rely on spring force to carry out the locking, the poor problem of reliability.

Drawings

In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is an exploded view of a locking arrangement provided by the present invention;

FIG. 2 is a schematic structural view of the locking device provided by the present invention in an unlocked state;

FIG. 3 is one of the cross-sectional views of the locking device provided by the present invention in the unlocked position;

FIG. 4 is a second cross-sectional view of the locking device of the present invention in an unlocked position;

FIG. 5 is a schematic structural view of the locking device provided by the present invention in a locked state;

FIG. 6 is one of the cross-sectional views of the locking device provided by the present invention in a locked condition;

FIG. 7 is a second cross-sectional view of the locking device of the present invention in a locked state;

FIG. 8 is a schematic structural view of a lock cylinder provided by the present invention;

FIG. 9 is a schematic structural view of a lock housing provided in accordance with the present invention;

FIG. 10 is a cross-sectional view taken along line A-A of FIG. 9;

FIG. 11 is a schematic structural view of a connecting rod provided by the present invention;

FIG. 12 is a schematic view of the structure of the operation part provided by the present invention;

reference numerals:

1: a lock cylinder; 2: a lock case; 3: a connecting rod;

4: an operation section; 5: an elastic member; 6: a first step surface;

7: a second step surface; 8: a limit stop block; 9: a first contact surface;

10: a second contact surface; 11: installing a flange; 12: a first bar member;

13: a second bar member; 14: a handle; 15: connecting the bosses;

16: a first hinge hole; 17: a first hinge shaft; 18: a second hinge hole;

19: a second hinge shaft; 20: a third hinge hole; 21: a third hinge shaft.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The locking device of the present invention will be described below with reference to fig. 1 to 12.

As shown in fig. 1 to 7, an embodiment of the present invention provides a lock device including a key cylinder 1, a lock case 2, a link 3, and an operation portion 4.

Specifically, the lock cylinder 1 is movably inserted into the lock case 2, so that the lock cylinder 1 can extend out of the lock case 2 or retract into the lock case 2. As shown in fig. 2 and 5, the first end of the connecting rod 3 is hinged to the lock case 2, the second end is hinged to the first hinge of the operating part 4, and the first end of the lock cylinder 1 is hinged to the second hinge of the operating part 4 to form a link mechanism. In terms of the arrangement position of the locking device shown in fig. 2 and 5, the left end of the connecting rod 3 in the drawing is the first end of the connecting rod 3, and the right end of the connecting rod 3 in the drawing is the second end of the connecting rod 3; the right end of the lock cylinder 1 in the figure is the first end of the lock cylinder 1, and the left end of the lock cylinder 1 in the figure is the second end of the lock cylinder 1.

Wherein the operating part 4 is switchable between a first dead center position and a second dead center position of the linkage mechanism. As shown in fig. 2, in a case where the operation portion 4 is located at the first dead point position, the key cylinder 1 is in the unlocked state, and the first hinge is closer to the second end of the key cylinder 1 than the second hinge in the central axis direction of the key cylinder 1; at this time, as shown in fig. 4, the operation unit 4 is located at the upper part of the apparatus. As shown in fig. 5, in the case where the operation portion 4 is located at the second dead point position, the key cylinder 1 is in the locked state, and the second hinge is closer to the second end of the key cylinder 1 than the first hinge in the central axis direction of the key cylinder 1; at this time, as shown in fig. 7, the operation portion 4 is located at the lower portion of the apparatus. Wherein the second end of the lock cylinder 1 is opposite to the first end of the lock cylinder 1. In the present embodiment, the vertical direction in the drawings is the vertical direction in the positional relationship of the locking device shown in fig. 4 and 7.

So set up, adopt link mechanism, through pulling the operating portion and carry out the unblock of lock core and the switching between the locking state, come to carry out the locking to the landing leg, it is more convenient, laborsaving to operate. And the unlocking state and the locking state are both positioned at the dead point position of the connecting rod mechanism by utilizing the dead point principle of the connecting rod mechanism. The locking is realized through a mechanical structure, and the reliability of the locking is improved. Thereby the locking means who has solved among the prior art landing leg is comparatively hard when locking and unblock state switch, and the operation is inconvenient to and rely on spring force to carry out the locking, the poor problem of reliability.

In the embodiment of the present invention, the locking device further includes an elastic member 5, and the elastic member 5 is disposed between the lock cylinder 1 and the lock case 2. In the case where the operating portion 4 is moved from the first dead center position to the second dead center position, the elastic member 5 is in a compressed state, and the amount of compression thereof is gradually reduced to urge the operating portion 4 to move to the second dead center position, so that it is possible to assist the automatic movement of the operating portion 4 from the first dead center position to the second dead center position. Wherein, the elastic member 5 may be a spring.

As shown in fig. 3, when the lock cylinder 1 is in an unlocked state and needs to be locked, the operating portion 4 needs to be pulled downward, the link mechanism drives the lock cylinder 1 to move leftward, and the lock cylinder 1 extends out of the lock case 2. As shown in fig. 6, when the link mechanism moves to the second dead point position, the locking is completed. Since the spring is in a compressed state, the spring always exerts a force to the left on the lock cylinder 1 during this movement. Thus, when the operating part 4 is pulled down away from the first dead center position, the spring force assists the engagement to automatically move the link mechanism to the second dead center position.

With this arrangement, the link mechanism can be automatically brought to the second dead point position by the reaction force generated by the elastic member, and the lock is performed. Because the elastic member plays an auxiliary role, the required elastic force is small, so the elastic coefficient is small, and compared with the prior art, the required force when the operating part is pulled is also relatively small.

Further, as shown in fig. 7, when the operation portion 4 is pulled to exceed the second dead point position and continue moving leftward during locking, the link mechanism drives the key cylinder 1 to move rightward. Therefore, in the embodiment of the present invention, an elastic member 5 is disposed between the key cylinder 1 and the lock case 2, and the elastic member 5 is in a compressed state. When the operation portion 4 continues to move beyond the second dead point position, the amount of compression of the elastic member 5 gradually increases, so that the operation portion 4 can be prevented from continuing to move. And the elastic member 5 urges the operating part 4 to return to the second dead point position by the elastic force of the elastic member 5, so that the operating part 4 can automatically return to the second dead point position. With this arrangement, even if the operating portion is pulled to move the link mechanism beyond the second dead center position during locking, the elastic force of the elastic member automatically returns the link mechanism to the second dead center position, thereby performing locking.

As shown in fig. 8, the key cylinder 1 is provided with a first step surface 6. As shown in fig. 10, a second step surface 7 is provided in the lock case 2. The elastic piece 5 is sleeved on the lock core 1, one end of the elastic piece 5 abuts against the first step surface 6, and the other end abuts against the second step surface 7. Thereby, the operation part 4 is automatically moved to the second dead point position by the elastic force of the elastic member 5, and locking is performed.

In the embodiment of the utility model, the locking device further comprises a limit stop 8, and the limit stop 8 is arranged on the connecting rod 3. When the operation unit 4 moves to the first dead point position, the limit stopper 8 abuts against the operation unit 4, and the operation unit 4 can be prevented from moving further beyond the first dead point position. And/or, when the operation portion 4 moves to the second dead point position, the limit stopper 8 abuts against the operation portion 4, thereby preventing the operation portion 4 from continuing to move beyond the second dead point position.

Specifically, as shown in fig. 2, when the lock cylinder 1 is in an unlocked state and needs to be locked, the operating portion 4 needs to be pulled downward, the link mechanism drives the lock cylinder 1 to move leftward, and the lock cylinder 1 extends out of the lock case 2. And completing the locking when the link mechanism moves to the second dead point position. Due to the provision of the limit stopper 8, the operating portion 4 does not exceed the second dead point position. As shown in fig. 5, when the lock cylinder 1 is in a locked state and needs to be unlocked, the operating part 4 needs to be pulled upwards, the link mechanism drives the lock cylinder 1 to move rightwards, and the lock cylinder 1 gradually retracts into the lock case 2. And completing unlocking until the link mechanism moves to the first dead point position. Due to the provision of the limit stopper 8, the operation portion 4 does not exceed the first dead point position. So set up, utilize limit stop, restricted the motion range of operation portion, realize the convenience of operation.

In an embodiment of the utility model, the operating portion 4 is provided with a first contact surface 9. As shown in fig. 2, when the operation unit 4 moves to the first dead point position, the first contact surface 9 abuts against the limit stopper 8, and the operation unit 4 rotates to the proper position to complete the unlocking. And/or the operating part 4 is provided with a second contact surface 10. As shown in fig. 5, when the operation portion 4 moves to the second dead point position, the second contact surface 10 abuts against the limit stopper 8, and at this time, the operation portion 4 rotates to the proper position, and the locking is completed. Therefore, the operation is convenient and fast, and the use is reliable.

In an embodiment of the utility model, the locking arrangement further comprises a mounting flange 11 arranged on the lock housing 2. The mounting flange 11 is uniformly provided with a plurality of mounting holes so as to mount and fix the locking device.

As shown in fig. 11, the connecting rod 3 includes a first rod 12 and a second rod 13 respectively disposed at both sides of the lock case 2, and both ends of the limit stopper 8 are respectively connected to the first rod 12 and the second rod 13. The first ends of the first rod 12 and the second rod 13 and the lock case 2 are correspondingly provided with a first hinge hole 16 for inserting a first hinge shaft 17, so that the connecting rod 3 is hinged with the lock case 2. The second ends of the first rod 12 and the second rod 13 and the operating part 4 are provided with a second hinge hole 18 for inserting a second hinge shaft 19, so that the connecting rod 3 is hinged to the operating part 4.

As shown in fig. 12, the operating portion 4 includes a handle 14 and a connecting boss 15 provided protrudingly on the handle 14. In order to provide a certain movement space for the lock cylinder 1, the handle 14 is provided with a through slot, and connecting bosses 15 are provided on both sides of the through slot. The handle 14 is provided with a first hinge and the connecting boss 15 is provided with a second hinge. Specifically, the connecting boss 15 and the lock cylinder 1 are correspondingly provided with a third hinge hole 20 for inserting a third hinge shaft 21, so that the connecting boss 15 is hinged to the lock cylinder 1 to form a second hinge. The handle 14 is provided with a second hinge hole 18, and the handle 14 is hinged to the connecting rod 3 by inserting a second hinge shaft 19 to form a first hinge. As shown in fig. 3, when the operating portion 4 is located at the first dead point position, the handle 14 is closer to the second end of the key cylinder 1 than the connecting boss 15 along the central axis direction of the key cylinder 1. As shown in fig. 6, when the operating portion 4 is located at the second dead point position, the coupling boss 15 is closer to the second end of the key cylinder 1 with respect to the handle 14 in the central axis direction of the key cylinder 1.

The present invention provides a working machine, and the working machine described below and the locking device described above are referred to in correspondence with each other.

The embodiment of the utility model also provides the operation machine, and particularly relates to the operation machine such as a concrete pump truck, a fire engine and the like. The working machine comprises a vehicle body and a leg arranged on the vehicle body, wherein the leg is provided with the locking device provided by each embodiment or the vehicle body is provided with the locking device provided by each embodiment. Therefore, the connecting rod mechanism is utilized, the unlocking state and the locking state of the lock cylinder are switched through the operation part, the supporting leg is locked, and the operation is more convenient and labor-saving. And the unlocking state and the locking state are both positioned at the dead point position of the link mechanism, and the locking reliability is improved by utilizing the dead point principle of the link mechanism. The derivation process of the advantageous effect is substantially similar to the derivation process of the advantageous effect of the locking device, and therefore, the description thereof is omitted.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. A locking device, comprising:

the lock comprises a lock core and a lock shell, wherein the lock core is movably inserted into the lock shell;

the first end of the connecting rod is hinged with the lock shell, the second end of the connecting rod is hinged with the first hinge joint of the operating part, and the first end of the lock cylinder is hinged with the second hinge joint of the operating part to form a connecting rod mechanism;

wherein the operating portion is switchable between a first dead center position and a second dead center position of the link mechanism; when the operating part is located at the first dead point position, the lock cylinder is in an unlocking state, and the first hinge joint is closer to the second end of the lock cylinder relative to the second hinge joint along the central shaft direction of the lock cylinder; when the operating part is located at the second dead point position, the lock cylinder is in a locked state, and the second hinge is closer to the second end of the lock cylinder relative to the first hinge along the central axis direction of the lock cylinder; wherein the second end of the lock cylinder is opposite the first end of the lock cylinder.

2. The lock mechanism of claim 1, further comprising a spring disposed between the lock cylinder and the lock housing,

wherein, in a case where the operating portion is moved from the first dead center position to the second dead center position, an amount of compression of the elastic member is gradually reduced to facilitate the operating portion to move to the second dead center position.

3. The lock device according to claim 2, wherein in a case where the operation portion continues to move in a direction exceeding the second dead center position, a compression amount of the elastic member gradually increases to prevent the operation portion from continuing to move and promote the operation portion to return to the second dead center position.

4. The lock assembly of claim 2, wherein the lock cylinder has a first step surface, the lock housing has a second step surface, the resilient member is disposed over the lock cylinder, and one end of the resilient member abuts against the first step surface and the other end abuts against the second step surface.

5. The lock-out mechanism of claim 1, further comprising a limit stop disposed on the linkage,

when the operating part moves to the first dead point position, the limit stop abuts against the operating part to prevent the operating part from moving in a direction exceeding the first dead point position; and/or the presence of a gas in the gas,

when the operating portion moves to the second dead point position, the limit stopper abuts against the operating portion to prevent the operating portion from continuing to move beyond the second dead point position.

6. The lock-out mechanism of claim 5, wherein the operating portion is provided with a first contact surface that abuts against the limit stopper in the case where the operating portion is moved to the first dead-center position; and/or the presence of a gas in the gas,

the operating part is provided with a second contact surface which is abutted against the limit stop when the operating part moves to the second dead point position.

7. A lock arrangement according to any one of claims 1 to 6, further including a mounting flange provided on the housing.

8. The lock mechanism as claimed in any one of claims 1 to 6, wherein the link comprises a first rod member and a second rod member respectively disposed on either side of the lock housing,

the two ends of the first rod piece are hinged to the lock shell and the operating part respectively, and the two ends of the second rod piece are hinged to the lock shell and the operating part respectively.

9. The lock-out device of any one of claims 1-6, wherein the operating portion comprises:

the handle is provided with the first hinge joint so as to enable the handle to be hinged with the connecting rod;

the connecting boss is convexly arranged on the handle and provided with the second hinge joint so as to enable the connecting boss to be hinged with the lock cylinder;

wherein, in a case where the operating portion is located at the first dead point position, the handle is closer to a second end of the key cylinder with respect to the connecting boss in a central axis direction of the key cylinder; when the operating part is located at the second dead center position, the connecting boss is closer to the second end of the key cylinder relative to the handle in the central axis direction of the key cylinder.

10. A work machine comprising a vehicle body and a leg arranged on the vehicle body, characterized in that the leg is provided with a locking device according to any of claims 1-9, or the vehicle body is provided with a locking device according to any of claims 1-9.

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