CN112125173A

CN112125173A - Locking device and engineering machinery

Info

Publication number: CN112125173A
Application number: CN202010911222.4A
Authority: CN
Inventors: 薛国能; 李小飞; 周露; 赵建阳; 沈昌武
Original assignee: Zoomlion Heavy Industry Science and Technology Co Ltd
Current assignee: Zoomlion Heavy Industry Science and Technology Co Ltd
Priority date: 2020-09-02
Filing date: 2020-09-02
Publication date: 2020-12-25

Abstract

The invention relates to the field of engineering machinery and discloses a locking device and engineering machinery, wherein the locking device is used for releasably locking at least two structures relatively, through holes are formed in the two structures correspondingly, the locking device comprises a mounting seat, a locking piece, a resetting piece, a rotating supporting shaft and a cam part, the mounting seat is provided with an opening capable of corresponding to the through holes, the locking piece is positioned in the mounting seat, a first end can extend out of the opening and be inserted into the through holes, the resetting piece provides resetting force which is in direct proportion to the extending length of the first end and faces the mounting seat for the locking piece, the rotating supporting shaft is mounted on the mounting seat, the cam part is connected with the rotating supporting shaft and can rotate around the axis of the rotating supporting shaft from a first position to a second position to a third position, and when the first position is in the mounting seat, the first end is in; when the first end of the locking piece is extended out of the mounting seat by a first distance, the locking piece is pushed to move to a second position; when the locking piece is pushed to extend out of the mounting seat by a second distance in a second direction, the first distance is larger than the second distance.

Description

Locking device and engineering machinery

Technical Field

The invention relates to the field of engineering machinery, in particular to a locking device and engineering machinery.

Background

Mobilizable mobile crane is engineering machine tool commonly used in modern industry, and under the general condition, mobile crane all includes telescopic activity landing leg, generally includes fixed landing leg and activity landing leg, and fixed landing leg is installed on mobile crane's chassis, and activity landing leg cover is established in fixed landing leg, and set up to follow stretch out among the fixed landing leg, and the activity landing leg can include a plurality of that the successive layer overlaps and establishes, under specific operating mode, need use locking means to make activity landing leg and fixed landing leg unable continuation stretch out or retract each other with movable landing leg locking each other, and current locking means has usually that the structure is complicated, the locking is perhaps not convenient, locking state reliability is poor and causes mobile crane to travel or the operation in-process landing leg rock shortcoming such as unsafe.

Disclosure of Invention

The invention aims to provide a locking device and engineering machinery.

In order to achieve the above object, the present invention provides a locking device for releasably locking at least two structures with through holes formed in the corresponding structures, the locking device comprising a mounting seat, a locking member, a reset member, a rotating support shaft and a cam portion, wherein the mounting seat is formed with an opening corresponding to the through holes, the locking member is mounted in the mounting seat and is configured such that a first end can protrude from the opening into the through holes outside the mounting seat and a second end is limited in the mounting seat, the locking member is used for applying a reset force to the first end of the locking member toward the inside of the mounting seat and the reset force is provided in proportion to the length of the first end protruding out of the mounting seat, the rotating support shaft is mounted in the mounting seat, and the cam portion is connected to the rotating support shaft, A cam portion that is in contact with the lock member and is sequentially rotatable about an axis of the rotation support shaft from a first orientation to a second orientation to a third orientation, the cam portion being provided: when the locking piece is positioned at the first direction, the first end of the locking piece is positioned in the mounting seat; when the cam part is positioned at the second orientation, the cam part pushes the locking piece to enable the first end to extend out of the mounting seat by a first distance; when the cam part is located at the second position, the cam part pushes the locking piece to enable the first end to extend out of the mounting seat by a second distance, wherein the first distance is larger than the second distance.

Preferably, the locking member is a locking pin, the reset member is a spring, a channel extending along a first direction is formed on the mounting seat, the end of the channel is formed as the opening, the locking pin is installed in the channel, and is set such that a first end can extend out of the channel to the outside of the mounting seat to be inserted into the through hole, a second end is limited in the channel, and the spring is sleeved on the periphery of the locking pin and limited between the second end of the locking pin and the body of the mounting seat.

Preferably, the cam portion comprises a cam body and a handle connected, the cam portion being arranged such that when in the third orientation, the handle interferes with the mount such that the cam portion (5) cannot continue to rotate.

Preferably, the cam body and the handle are integrally formed.

Preferably, the rotation support shaft is located outside the second end of the lock pin, and an axis of the rotation support shaft extends in a second direction perpendicular to the first direction.

Preferably, the mounting seat is oppositely formed with two mounting through holes at two sides of the channel, the rotating support shaft includes a support shaft, a movable nut and two shaft sleeves, one end of the support shaft is provided with a fixed nut, the other end of the support shaft is formed with a thread capable of being matched with the movable nut, the shaft sleeves and the cam portion are all sleeved on the rotating support shaft, the two shaft sleeves are respectively located at two sides of the cam portion, and two ends of each shaft sleeve respectively abut against the cam portion and the mounting seat at the corresponding side.

Preferably, a through groove is formed on the mount corresponding to the passage, through which the cam portion passes when the cam portion rotates about the axis of the rotation support shaft.

Preferably, the mounting portion is mounted on one of the at least two structures.

According to another aspect of the invention, a construction machine is provided, wherein the construction machine comprises the locking device.

Preferably, the engineering machinery comprises a fixed supporting leg and at least one movable supporting leg sleeved in the fixed supporting leg, and the at least two structures comprise the fixed supporting leg and the movable supporting leg.

Preferably, the engineering machinery is an automobile crane.

Through the technical scheme, the locking operation can be realized by rotating the cam part in a certain direction, and when the locking is required to be released, only the cam part needs to be rotated in the opposite direction, at the moment, only force needs to be applied to enable the cam part to return to the second position, and the cam part can automatically rotate under the action of the reset force of the reset piece and then return to the first position. And, because the first distance is greater than the second distance, the reset force that the cam part needs to overcome in the second orientation is greater than the reset force that needs to overcome in the third orientation, if the cam part is not acted on in the opposite direction, the cam part will not produce the movement tendency that returns to the second orientation from the third orientation, therefore, can guarantee effectively that the cam part in the third orientation keeps the third orientation steadily and is difficult to return to the second orientation, thus guarantee the stability of the locking state.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a cross-sectional and perspective view of a locking device according to one embodiment of the present invention with a cam portion in a first orientation;

FIG. 2 is a cross-sectional and perspective view of the locking device of FIG. 1 with the cam portion in a second orientation;

FIG. 3 is a cross-sectional and perspective view of the locking device of FIG. 1 with the cam portion in a third orientation;

FIG. 4 is an exploded view of the various components of the locking arrangement of FIG. 1;

FIGS. 5a to 5c are views of the locking device of FIG. 1 applied to a leg, with the movable leg of FIGS. 5a to 5c in fully retracted, half extended and fully extended positions, respectively, within, from and out of the fixed leg;

fig. 6 is an enlarged partial sectional view taken along line a-a in fig. 5.

Description of the reference numerals

1 locking pin; 2, mounting a base; 21 channels; 22 through grooves; 3, a spring; 31 a central channel; 4 rotating the supporting shaft; 41 supporting the shaft; 42 a removable nut; 43 shaft sleeves; 5a cam part; 51 a cam body; 52 a handle; 6 fixing the supporting legs; 7 Movable supporting leg

Detailed Description

In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.

In the present invention, it is to be understood that the terms "away", "toward", and the like indicate an orientation or positional relationship corresponding to an orientation or positional relationship in actual use; "inner and outer" refer to the inner and outer relative to the profile of the components themselves. These are merely for convenience in describing the invention and to simplify the description, and are not intended to indicate that the device or component in question must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The invention provides a locking device for releasably locking at least two structures which are correspondingly and respectively provided with a through hole, the locking device comprises a mounting seat 2, a locking piece, a resetting piece, a rotary supporting shaft 4 and a cam part 5, wherein the mounting seat 2 is provided with an opening which can correspond to the through hole, the locking piece is mounted in the mounting seat 2 and is arranged that a first end can extend out of the opening into the through hole outside the mounting seat 2, a second end is limited in the mounting seat 2, the resetting force is proportional to the length of the first end extending out of the mounting seat 2, the rotary supporting shaft 4 is mounted in the mounting seat 2, the cam part 5 is connected to the rotary supporting shaft 4 and is in contact with the locking piece, And is rotatable in order about the axis of the rotation support shaft 4 from a first orientation to a second orientation and then to a third orientation, the cam portion 5 being provided: when the first direction is located, the first end of the locking piece is located in the sitting seat 2; in the second orientation, the cam portion 5 pushes the latch member such that the first end extends a first distance out of the mounting block 2; in the second orientation, the cam portion 5 pushes the latch member such that the first end extends out of the mounting block 2 a second distance, wherein the first distance is greater than the second distance.

With the locking device of the present invention, when the cam portion 5 is in the first orientation, the first end of the locking member is located in the mounting seat 2, i.e. the first end of the locking member does not protrude from the mounting seat 2 through the opening to the outside of the mounting seat 2, and there is no relative locking relationship between the at least two structures, and the locking device is in a release state, in which the reset member (e.g. the spring 3) may be in a natural state; when the cam part 5 rotates to a second orientation (clockwise or anticlockwise), the first end of the locking piece extends out of the opening by a first distance under the pushing of the cam part 5 and overcoming the reset force of the reset piece; when the cam part 5 continues to rotate to the third orientation, the first end of the locking piece extends out of the opening by a second distance under the pushing of the cam part 5 and overcoming the reset force of the reset piece, so that by inserting the locking members projecting from the mounting seat 2 into the corresponding through holes of said at least two structures, it is possible to lock the at least two structures relative to each other, without producing relative movements, including linear or rotational movements, by rotating the cam part 5 in a certain direction, when the locking is required to be released, the cam part 5 only needs to be rotated in the opposite direction, and at the moment, after the cam part 5 is returned to the second orientation by applying force, the cam part 5 can be automatically rotated to return to the first orientation by the action of the resetting force of the resetting piece, it can be seen that the locking device of the present invention has a simple structure, and the locking operation and the unlocking (releasing) operation are very convenient.

Because the first distance is greater than the second distance, the resetting force of the resetting piece required to be overcome by the cam part 5 in the second orientation is greater than the resetting force of the resetting piece required to be overcome in the third orientation, and if the cam part 5 is not acted in the opposite direction, the cam part 5 does not generate a movement trend of returning from the third orientation to the second orientation, so that the cam part 5 in the third orientation can be effectively ensured to be stably maintained in the third orientation and not easily return to the second orientation, and the stability of the locking state is ensured.

More specifically, as an option, the locking member may be a locking pin 1, the resetting member may be a spring 3, a channel 21 extending in a first direction is formed on the mounting seat 2, an end of the channel 21 is formed as the opening, the locking pin 1 is installed in the channel 21, and is configured such that a first end can protrude from the channel 21 to the outside of the mounting seat 2 and insert into the through hole, a second end is limited in the channel 21, the spring 3 is sleeved on the periphery of the locking pin 1 and limited between the second end of the locking pin 1 and the body of the mounting seat 2, and the cam portion 5 abuts against the second end of the locking pin 1.

It is understood that in the present embodiment, when the cam portion 5 is in the first orientation, the first portion of the cam portion 5 is in contact with the first end of the striker 1, when the cam portion 5 is in the second orientation, the second portion of the cam portion 5 is in contact with the first end of the striker 1, and when the cam portion 5 is in the third orientation, the third portion of the cam portion 5 is in contact with the first end of the striker 1, the shape of the cam portion 5 is set as: the distance from the axis of the rotation support shaft 8 to the first location is smaller than the distance from the axis of the rotation support shaft 8 to the second location and the distance from the axis of the rotation support shaft 8 to the third location, and the distance from the axis of the rotation support shaft 8 to the second location is larger than the distance from the axis of the rotation support shaft 8 to the third location.

In addition, in some embodiments, the outer edge of the cam portion 5 is smoothly transited from the first portion to the second portion to the third portion, so that the rotation operation of the cam portion 5 is facilitated. Preferably, when the cam part 5 rotates from the second orientation to the third orientation, the angle through which the rotation passes is large, and for example, the angle may be controlled within 30 °, and the first distance and the second distance may also be controlled within a certain range, so that when the cam part 5 is rotated in the opposite direction to release the lock, the operation is easier and more labor-saving.

Further, the cam portion 5 includes a cam main body 51 and a handle 52 connected, and the cam portion 5 is configured such that when in the third orientation, the handle 52 interferes with the mount 2 such that the cam portion 5 cannot rotate any further. For example, the handle 52 may be linear, when the cam portion 5 is in the third orientation, a third portion of the cam main body 51 is in contact with the first end of the latch bolt 1, the handle 52 extends along a tangent line of the cam main body 51 at the third portion, so that when the cam portion 5 rotates to the third portion, the side wall of the handle 52 abuts against the latch bolt 1, and the handle 2 extends for a certain length, so that the handle 52 interferes with the mounting seat 2, and the cam portion 5 cannot continue to rotate in the original direction in the through groove 22, that is, after the cam portion 5 can only rotate in one direction from the first orientation to the third orientation, the cam portion 5 cannot continue to rotate in the one direction.

In the present embodiment, the cam main body 51 and the handle 52 are integrally formed, and referring to fig. 1, the entire cam portion 5 is formed by bending a rod-shaped object, the bent portion is formed as the cam main body 51, and the straight portion is formed as the handle 52; and the bent portion of the cam main body 51 is set to exceed 180 deg. to obtain a more stable locked state.

Referring to fig. 1, in the present embodiment, specifically, the rotation support shaft 4 is located outside the second end of the lock pin 1, and the axis of the rotation support shaft 4 extends in a second direction perpendicular to the first direction. And, at the position corresponding to the passage 21, a through groove 22 is formed on the mount base 2, and when the cam portion 5 rotates about the axis of the rotation support shaft 4, the cam portion 5 passes through the through groove 22, wherein, on the two side walls of the mount base 5 corresponding to the passage 21 and parallel to the second direction, opposing grooves may be opened to form the through groove 22 passing through the groove and through a part of the passage 21, and the plane of extension of the through groove 22 is perpendicular to the second direction, that is, the plane of rotation of the cam portion 5 is perpendicular to the second direction.

As a preferred embodiment, the mounting seat 2 is oppositely formed with two mounting through holes at two sides of the channel 21, the rotating support shaft 4 includes a support shaft 41, a movable nut 42 and two shaft sleeves 43, one end of the support shaft 41 is provided with a fixed nut, the other end is formed with a thread capable of cooperating with the movable nut 42, the shaft sleeves 43 and the cam portion 5 are both sleeved on the rotating support shaft 4, the two shaft sleeves 43 are respectively located at two sides of the cam portion 5, and two ends of each shaft sleeve 43 respectively abut against the cam portion 5 and the mounting seat 2 at the corresponding side, so that the cam portion 5 can further rotate in the through slot 22 by the two shaft sleeves 43. In this way, the cam portion 5 and the rotation support shaft 4 are detachably mounted to facilitate the removal or replacement of the cam portion 5 when necessary, and the cam portion 5 having different cam parameters can be designed to be mounted on the mounting seat 2 to adapt to different application environments.

The locking bolt 7 may have an outer collar of larger outer diameter at the second end and an inner collar projecting radially inwardly at one end of the passage 21 of the mounting socket 2, the outer collar and inner collar forming a restriction to prevent the second end of the locking bolt 7 from being removed from the passage 21.

Additionally, the mounting portion is mounted on one of the at least two structures. For example, the bottom of the mounting base 2 may have a mounting base plate, the mounting base plate includes mounting tabs extending from two sides, the mounting tabs are formed with mounting holes, and the mounting base 2 may be mounted to one of the at least two structures by fasteners passing through the mounting holes.

According to another aspect of the invention, a working machine is provided, comprising a locking device according to the invention.

Specifically, the engineering machine may be a truck crane or the like. The engineering machinery can comprise a fixed supporting leg 6 and at least one movable supporting leg 7 sleeved in the fixed supporting leg 6, and the at least two structures comprise the fixed supporting leg 6 and the movable supporting leg 7. Specifically, the mounting seat 2 can be mounted on the fixed leg 6, through holes can be correspondingly formed in the fixed leg 6 and the movable leg 7 at different positions, the locking pin 1 penetrates out of the mounting seat 2 and penetrates through the through holes in the fixed leg 6 and the movable leg 7, the fixed leg 6 and the movable leg 7 can be locked relatively, the locking state can be that the movable leg 7 is retracted into the fixed leg 6 completely, the movable leg 7 is extended out of the fixed leg 6 in half, the movable leg 7 is extended out of the fixed leg 6 completely, and the like, and it can be understood that the movable leg 7 can comprise a plurality of through holes, and the fixed leg 6 can be sleeved with the movable leg 7 layer by. When the locking device is applied to the supporting leg of the automobile crane, the operation is convenient, the locking is reliable, and the problem that the supporting leg shakes during the driving or operation process of the automobile crane can be effectively reduced.

In addition, it will be appreciated that the locking device may also be used for locking the outriggers of other work machines, or the locking device may also be used for locking other structures of other work machines than outriggers, for example, inter-arm joint locking.

In the description herein, reference to the terms "one embodiment," "some embodiments," "for example," or "example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the various embodiments or examples and features of the various embodiments or examples described in this specification can be combined and combined by those skilled in the art without contradiction.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention. Including each of the specific features, are combined in any suitable manner. The invention is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.

Claims

1. A locking device for releasably locking at least two structures relative to each other, the at least two structures being correspondingly formed with through holes, characterized in that the locking device comprises a mounting base (2), a locking member, a reset member, a rotation support shaft (4) and a cam portion (5), the mounting base (2) being formed with an opening corresponding to the through holes, the locking member being mounted in the mounting base (2) and being arranged such that a first end is capable of protruding from the opening out of the mounting base (2) into the through holes, a second end is confined in the mounting base (2), the reset member being adapted to apply a reset force to the first end of the locking member towards the inside of the mounting base (2) and being provided with a reset force having a magnitude proportional to the length of the first end protruding out of the mounting base (2), the rotary supporting shaft (4) is mounted on the mounting seat (2), the cam part (5) is connected to the rotary supporting shaft (4), contacts with the locking piece and can rotate around the axis of the rotary supporting shaft (4) from a first position to a second position and then to a third position in sequence, and the cam part (5) is arranged as follows: when the locking piece is positioned at the first direction, the first end of the locking piece is positioned in the mounting seat (2); when in the second orientation, the cam portion (5) pushes the locking member such that the first end extends out of the mounting seat (2) a first distance; in the second orientation, the cam portion (5) pushes the latch member such that the first end extends out of the mounting block (2) a second distance, wherein the first distance is greater than the second distance.

2. The locking device of claim 1, wherein the locking member is a locking pin (1), the reset member is a spring (3), the mounting seat (2) is formed with a channel (21) extending along a first direction, the end of the channel (21) is formed as the opening, the locking pin (1) is installed in the channel (21) and is configured such that a first end can protrude from the channel (21) to the outside of the mounting seat (2) and be inserted into the through hole, a second end is limited in the channel (21), and the spring (3) is sleeved on the periphery of the locking pin (1) and is limited between the second end of the locking pin (1) and the body of the mounting seat (2).

3. The locking arrangement as claimed in claim 2, characterized in that the rotation support shaft (4) is located outside the second end of the locking pin (1) and the axis of the rotation support shaft (4) extends in a second direction, which is perpendicular to the first direction.

4. The locking device according to claim 2, characterized in that the mounting seat (2) is oppositely formed with two mounting through holes at two sides of the channel (21), the rotating support shaft (4) comprises a support shaft (41), a movable nut (42) and two shaft sleeves (43), one end of the support shaft (41) is provided with a fixed nut, the other end is formed with a thread capable of being matched with the movable nut (42), the shaft sleeves (43) and the cam portion (5) are sleeved on the rotating support shaft (4), the two shaft sleeves (43) are respectively located at two sides of the cam portion (5), and two ends of each shaft sleeve (43) respectively abut against the cam portion (5) and the mounting seat (2) at the corresponding side.

5. The locking device according to claim 2, characterized in that a through slot (22) is formed on the mounting seat (2) in correspondence of said passage (21), said cam portion (5) passing through said through slot (22) when said cam portion (5) rotates about the axis of said rotation support shaft (4).

6. The locking arrangement of claim 1, wherein the cam portion (5) comprises a cam body (51) and a handle (52) connected, the cam portion (5) being arranged such that when in the third orientation, the handle (52) interferes with the mounting (2) such that the cam portion (5) cannot rotate further.

7. The locking device of claim 6, characterized in that the cam body (51) and the handle (52) are formed integrally.

8. The lock-out mechanism of claim 1, wherein the mounting portion is mounted to one of the at least two structures.

9. A working machine, characterized in that the working machine comprises a locking arrangement according to any one of claims 1-8.

10. A working machine according to claim 9, characterized in that the working machine comprises a fixed leg (6) and at least one movable leg (7) nested inside the fixed leg (6), and that the at least two structures comprise the fixed leg (6) and the movable leg (7).

11. A working machine according to claim 10, characterized in that the working machine is a truck crane.