WO2013029392A1

WO2013029392A1 - Locking device for locking outrigger in engineering machinery

Info

Publication number: WO2013029392A1
Application number: PCT/CN2012/075579
Authority: WO
Inventors: 姜校林; 李世勋
Original assignee: 北汽福田汽车股份有限公司; 北京智科投资管理有限公司
Priority date: 2011-08-29
Filing date: 2012-05-16
Publication date: 2013-03-07
Also published as: CN102951129B; EP2752383A1; CN102951129A; EP2752383A4; EP2752383B1

Abstract

A locking device for locking an outrigger in engineering machinery comprises a housing (1) having a limited chamber inside and having a left end provided with an opening (10); a latch (2) disposed in the chamber, capable of moving between a first position and a second position in a left/right direction, and provided with a protruding shoulder (21) being at a predetermined distance away from a left end thereof, wherein when in the first position, the left end of the latch extends out of the chamber from the opening and the protruding shoulder abuts against a left side wall of the chamber, and when in the second position, the left end of the latch retracts into the chamber; an elastic member (3) sleeving the latch and pressing the protruding shoulder in a leftward direction in a biased manner; and a driving assembly (5), the driving assembly being used for driving the latch to move from the first position to the second position. The locking device is capable of reducing labor intensity and is reliable in locking.

Description

Locking device for locking legs in engineering machinery

The present invention relates to the field of construction machinery, and more particularly to an engineering machine for locking a leg and a locking device thereof. Background technique

In construction machinery such as pump trucks and cranes, when the boom is unfolded or hoisted, the legs will be extended to meet the stability requirements, and when the work is completed, the legs will be closed to reduce the volume. To meet the needs of walking, in order to avoid the accidental swing of the legs during walking, the design specifications of engineering vehicles such as pump trucks require mechanical locking devices to ensure that the legs are in the car body. Do not open. To this end, all pump trucks are currently equipped with mechanical locking devices.

At present, all such locking devices are manually operated, that is, the locking device is manually opened, the legs are extended, the legs are retracted after the work is completed, and the mechanical locking device is manually locked. That is, the following work cycle: Manually open the leg locks one by one to unfold the legs one by one to retract the legs one by one to manually lock the leg locks. Therefore, it is necessary to operate the leg lock twice for each work cycle, which is labor intensive and will cause a leak lock due to human forgetting. Summary of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Accordingly, it is an object of the present invention to provide a locking device for a locking leg for use in a construction machine that reduces labor intensity and lock.

A locking device according to an embodiment of the present invention includes: a housing defining a chamber inside and having an opening at a left end; and a locking tongue, the locking tongue being between the first position and the second position in the left-right direction Movingly disposed in the chamber, the bolt is formed with a shoulder having a predetermined distance from a left end thereof, wherein a left end of the bolt protrudes from the opening into the chamber when the first position is a shoulder abutting against a left side wall of the chamber, a second end of the locking tongue retracting into the chamber; and an elastic member, the elastic member being sleeved on the locking tongue The resilient member biases the shoulder in a leftward direction; and a drive assembly for driving the latch to move from the first position to the second position.

Therefore, in the present invention, the locking tongue can be automatically returned without manual operation by the cooperation between the locking tongue, the elastic member and the driving device, so that the present invention can reduce the labor intensity of the worker, and The lock tongue needs to be driven from the first position to the second position first, so that the phenomenon that the leg 100 is locked after being swinged back does not occur, and the lock is reliable.

In addition, the locking device for a locking leg in a construction machine according to the invention also has the additional technical feature that preferably the right end of the locking tongue is connected to a push rod, the upper part of which extends into Inside the chamber and perpendicularly connected to the locking tongue, and a lower portion protruding from the housing, the driving assembly is pivotally connected to the housing and used to push the lower portion of the push rod to the right. To drive the bolt from the first position to the second position.

Preferably, the drive assembly includes a handle and a cam coupled to one end of the handle, the drive assembly being configured to freely rotate the handle counterclockwise a predetermined angle when the bolt is in the second position.

Further, the locking device further includes two connecting plates respectively disposed on the front and rear sides of the driving assembly and respectively connected to the housing; and a pin shaft, the pin shaft Both ends are supported between the two connecting plates, wherein the drive assembly is pivotally disposed on the pin.

Preferably, the front side of the left end of the bolt forms a first slope and a straight line segment that is adjacent to the first slope and is located to the right of the first slope.

Preferably, the rear side of the left end of the bolt forms a second inclined surface, wherein a length of the first inclined surface extending in the left-right direction is smaller than a length of the second inclined surface extending in the left-right direction, and the first inclined surface is opposite to the first inclined surface The inclination angle of the left and right direction and the second slope relative to the left and right sides 2012/075579

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The inclination angles of the directions are approximately equal.

Preferably, the lock tongue has a cylindrical shape with an axis in the left-right direction, and the shoulder is formed around the lock tongue.

Preferably, the housing is a hollow cylinder having an axis in the left-right direction, and an annular boss is formed on a peripheral wall of the chamber adjacent to the right side wall thereof, wherein a rear end of the elastic member abuts against the boss On the front surface, wherein the elastic member is a compression spring, and a rear end of the compression spring abuts against a front surface of the boss.

Still further, an end cap is included, wherein a left side of the housing is open and the end cap encloses a left side of the housing, and the opening is formed on the end cap.

The upper portion of the push rod is connected to the bolt by a screw.

The additional aspects and advantages of the invention will be set forth in part in the description which follows. DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the preferred embodiments of the invention.

Figure 1 is a front elevational view of the locking device of the locking device in a first position in accordance with a preferred embodiment of the present invention;

Figure 2 is a plan view of the locking device shown in Figure 1;

Figure 3 is a left side view of the locking device shown in Figure 1;

Figure 4 is a cross-sectional view taken along line A-A of Figure 3;

Figure 5 is a front elevational view of the locking device of the locking device in a second position in accordance with a preferred embodiment of the present invention

Figure 6 is a plan view showing the locked state shown in Figure 5;

Figure 7 is a left side view of the locking device shown in Figure 5;

Figure 8 is a cross-sectional view taken along line BB of Figure 7; 9-11 are schematic views of the free rotation of the drive assembly when the bolt is in the second position in the locking device in accordance with a preferred embodiment of the present invention. detailed description

The preferred embodiments of the present invention are described in detail below, and the examples of the preferred embodiments are illustrated in the drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions. The preferred embodiments described below with reference to the accompanying drawings are intended to illustrate the invention and are not to be construed as limiting.

In the description of the present invention, it is to be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", etc. are based on The orientation or positional relationship shown in the drawings is merely for the convenience of the description of the present invention and the description of the invention, and is not intended to indicate or imply that the device or component referred to has a specific orientation, is constructed and operated in a specific orientation, and therefore cannot be understood as Limitations of the invention. Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that the terms "installation", "connected", and "connected" are to be understood broadly, and may be fixed or detachable, for example, unless otherwise explicitly defined and defined. Connected, or integrally connected; may be mechanically connected; may be directly connected, or may be indirectly connected through an intermediate medium, and may be internal to the two elements. The specific meaning of the above terms in the present invention can be understood in a specific case by those skilled in the art.

Further, in the description of the present invention, "multiple" means two or more unless otherwise stated.

A locking device for a locking leg in a construction machine in accordance with a preferred embodiment of the present invention will now be described with reference to Figs.

A locking device according to a preferred embodiment of the present invention includes: a housing 1, a locking tongue ² , an elastic member 3, a push rod 4, and a drive assembly 5, with the legs being stopped by the front side of the locking device The block is taken as an example for explanation. T/CN2012/075579

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As shown in Figures 1 - 4, the interior of the housing 1 defines a chamber, and the left end of the housing 1 has an opening 10. The lock tongue 2 is movably disposed in the chamber between the first position and the second position in the left-right direction, and the lock tongue 2 is formed with a shoulder 21 having a predetermined distance from the left end thereof. The front side of the left end of the bolt 2 forms a first slope 22, for example, as shown in Fig. 2, on the front side of the left end of the bolt 2 includes a first slope 22 and a straight section 24 which is in contact with the first slope 22. As shown in Figure 4, when the locking tongue 2 is in the first position, that is, the left end of the locking tongue 2 extends from the opening 10 and the shoulder 21 abuts against the left side wall of the chamber, at the front of the locking tongue 2 The straight section 24 stops against the leg 100 such that the leg 100 is in a locked state. As shown in Figures 5-8, the locking tongue 2 is in the second position, i.e., the left end of the locking tongue 2 is retracted into the chamber, at which time the leg 100 is unlocked, i.e. the leg 100 can pass over the locking tongue 2 put out.

The elastic member 3 is sleeved on the bolt 2 and the elastic member 3 biases the shoulder 21 in the leftward direction. Alternatively, the elastic member 3 is a compression spring. In the second embodiment, the second end of the bolt is moved from the first position. In the present embodiment, the right end of the bolt is connected with a push rod 4, and the upper portion of the push rod 4 projects into the chamber and is perpendicularly connected to the bolt 2, Alternatively, the upper portion of the push rod 4 is screwed to the lock tongue 2, and the lower portion of the push rod 4 projects out of the housing 1. And the locking device comprises a drive assembly 5, which in the present embodiment is pivotally connected to the housing 1 and is used to push the lower portion of the push rod 4 to the right to drive the bolt 2 to move from the first position Go to the second position.

After the leg 100 is not working, the locking tongue 2 is located in the first position in FIG. 4 and stops against the leg 100. When it is desired to operate the leg 100, the drive assembly 5 is first urged to push the pusher 4 to move the bolt 2 to the second position, i.e., the leg 100 is no longer locked, i.e., the leg lock is opened. At this time, the leg 100 can pass the locking device for normal operation, and when the leg passes over the locking device, the locking tongue will automatically return to the first position under the action of the elastic member 5. After the operation of the leg 100 is completed, before the operation of the leg 100, the lock tongue 2 needs to be driven to the second position first. After the leg 100 swings back, the lock tongue automatically returns again after the action of the elastic member 5. Go to the first position and lock the leg 100. Therefore, by the cooperation between the locking tongue, the elastic member and the driving device, the locking tongue can be automatically returned without manual operation, so the invention can reduce the labor intensity of the worker, and since the leg 100 needs to be placed back Driving the bolt to the second position, so that the leg 100 is not leaked after being swung back 12 075579

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The phenomenon of lock, the lock is reliable.

In the following, a preferred embodiment of the present invention and its working work will be described in detail with reference to the accompanying drawings, in which the entire movement is achieved by the cooperative movement between the drive assembly 5, the push rod 4 and the elastic member 3. When the leg is in the working cycle, it is only necessary to manually operate the locking device once, that is, to open the leg lock, and the step of re-manually locking the leg is omitted. In other words, it is only necessary to operate the lock device twice in each of the previous work cycles to become the operation lock device.

In accordance with a preferred embodiment of the present invention, as shown in Figure 4, the drive assembly 5 includes a handle 52 and a cam 51 coupled to one end of the handle 52, the drive assembly 5 being configured to provide free handle 52 when the latch 2 is in the second position Turn the ground counterclockwise by a predetermined angle. Initially, as shown in Fig. 4, the cam 51 is vertical, at which time the handle 52 is rotated clockwise so that the cam 51 pushes the push rod 4 to the right, as shown in Fig. 8, when the push rod 4 is pushed to a certain position 51 is separated from the push rod 4 and is in a free state. At this time, the cam 51 and the handle 52 are in the state shown in FIG. 9, and then the handle 52 is rotated counterclockwise by a predetermined angle due to gravity, as shown in FIG. 10, until returning to FIG. The position shown in 1 , wherein the size of the predetermined angle can be determined by a specific design. At this time, the left end of the lock tongue 2 is projected to the left due to the urging force of the elastic member 3 to expose the straight line portion 24, as in the state of Fig. 4, thereby locking the leg portion 100.

In addition, preferably, the locking device further comprises two connecting plates 6 and a pin shaft 7, as shown in FIG. 1 to FIG. 11, two connecting plates 6 are respectively disposed on the front and rear sides of the driving assembly 5 and respectively respectively. 1 is connected, and both ends of the pin 7 are supported between the two connecting plates 6, wherein the drive assembly 5 is pivotally provided on the pin 7.

As shown in FIG. 1 , preferably, the rear side of the left end of the locking tongue 2 forms a second inclined surface 23 , wherein the length of the first inclined surface 22 extending in the left-right direction is smaller than the length of the second inclined surface 23 extending in the left-right direction, and the first The inclination angle of the inclined surface 22 with respect to the left-right direction and the inclination angle of the second inclined surface 23 with respect to the left-right direction are substantially equal.

Further, as shown in FIG. 4, the lock tongue 2 has a cylindrical shape in which the axis is in the left-right direction, and the shoulder 21 is formed around the lock tongue 2. Alternatively, as shown in FIG. 4, the casing 1 is a hollow cylinder whose axis is in the left-right direction, that is, the chamber is also cylindrical in the left-right direction of the axis. An annular boss 11 is formed in the peripheral wall of the chamber adjacent to the right side wall thereof, wherein the rear end of the elastic member 3 abuts against the front surface of the boss 11.

As shown in Fig. 4, the locking device further comprises an end cap 8, wherein the left side of the housing 1 is open and the end cap 8 closes the left side of the housing 1, wherein the opening 10 is formed on the end cap 8, that is, The left end of the bolt 2 is movable left and right through the opening 10 in the end cap 8.

The operation of locking and unlocking the leg 100 by the locking device according to a preferred embodiment of the present invention will now be described with reference to Figs.

The locked state of the leg 100 is shown in Figs. At this time, the rear end of the elastic member 3 fitted over the bolt 2 is placed on the front surface of the annular boss 11 of the housing, and the front end is placed on the shoulder 21 of the bolt 2, so the shoulder 21 of the bolt 2 Resting on the right surface of the end cap 8, at this time, as shown in Figs. 1 and 4, the cam 51 is in a vertical state, and the first slope 22 and the second slope 23 of the bolt 2 are completely extended, as shown in Fig. 3. As shown, the straight section of the bolt 2 swings the stop leg 100 and the leg 100 is locked in the defined position.

The use state of the leg 100 is shown in Fig. 5-8. In order to swing the legs, the handle 52 of the drive drive assembly 5 is rotated clockwise, i.e., rotated from the position of the handle 52 of Fig. 4 to the position of the handle 52 of Fig. 8, and the cam 51 attached to the handle 52 pushes the push rod. 4 moves to the right, causing the bolt 2 to move to the right and further compress the elastic member 3, at which time the bolt 2 is retracted, and the first slope 22 of the bolt 2 is in the position shown in the top view of FIG. At this time, the first inclined surface 22 on the locking tongue 1 is aligned with the supporting leg 100 (as shown in the top view of FIG. 6), and when the supporting leg 100 is swung from the front to the rear, the leg 100 will hit the first inclined surface 22 The lock tongue 2 is further retracted, so that the leg 100 is detached from the restraint of the leg lock device, thereby releasing the leg lock.

During this process, when the leg 100 hits the first inclined surface 22, the locking tongue 2 is further moved to the right to compress the elastic member 3, thereby driving the push rod 4 to the right, and thus, as shown in FIG. 9, the push rod 4 and the cam 51 The surface is separated, the cam 51 is in a free state, and under the action of gravity, the driving assembly 5 will be rotated counterclockwise by a predetermined angle to the position shown in FIG. 10, after the leg 100 is knocked out, the spring force is made. In the following, the push rod 4 is moved to the left to collide with the cam 51 that has rotated a certain angle, so that a torque for rotating the handle 52 counterclockwise is generated. As shown in FIG. 9, the handle 52 is brought back to the position, and the figure is shown in FIG. 1 to FIG. The original state shown, that is, the tongue 2 is fully extended.

After the leg 100 is finished working, the operating leg 100 is returned to the front to cause it to hit the locking device. Since the locking tongue 2 has been automatically returned, the second inclined surface 23 faces the leg 100, and the leg 100 hits the locking tongue. The second inclined surface 23 of the second leg 23 retracts the locking tongue 2, and after the leg 100 passes over the locking tongue 2, the locking tongue 2 returns to the original position under the elastic force of the elastic member 3 (as shown in FIGS. 1 to 4). At this time, the straight section of the tongue 2 is aligned with the leg 100, and the leg 100 cannot swing freely, thereby achieving the purpose of safe locking.

In summary, the locking device for the locking leg in the construction machine provided by the preferred embodiment of the present invention can change the two operation locking devices in the conventional leg working cycle into one operation, that is, only It is necessary to manually operate the locking device to unlock the legs. The entire project can save 50% of the operation, achieve the purpose of automatic locking, reduce the labor intensity, and the locking device is reliable and locked relative to the manual locking. A leak lock will occur because of human forgetting.

In the description of the present specification, reference is made to the terms "one embodiment", "some embodiments", "illustrative embodiments", "preferred embodiments", "example", "specific examples", or "some examples", etc. The description means that specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms does not necessarily mean the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

While the preferred embodiment of the invention has been shown and described, it will be understood Variations, the scope of the invention is defined by the claims and their equivalents.

Claims

Rights request

What is claimed is: 1. A locking device for a locking leg in a construction machine, comprising: a housing, wherein the housing defines a chamber and the left end has a mouth;

a locking tongue, the locking tongue is movably disposed in the chamber between the first position and the second position in a left-right direction, and the locking tongue is formed with a shoulder having a predetermined distance from a left end thereof, wherein the first position The left end of the bolt protrudes from the opening into the chamber, and the shoulder abuts against the left side wall of the chamber, and the left end of the bolt retracts into the cavity when in the second position In the room;

An elastic member, the elastic member is sleeved on the bolt and the elastic member biases the shoulder in a leftward direction;

a drive assembly for driving the bolt to move from the first position to the second position.

2. The locking device according to claim 1, wherein a right end of the bolt is connected with a push rod, and an upper portion of the push rod extends into the chamber and is vertically connected to the lock tongue And a lower portion extending from the housing, the drive assembly being pivotally coupled to the housing and for urging a lower portion of the push rod to move to the right to drive the lock tongue to move from the first position To the second position.

3. The locking device according to claim 2, wherein the drive assembly comprises a handle and a cam connected to one end of the handle, the drive assembly being configured to be located when the lock tongue is located In the two positions, the handle is free to rotate counterclockwise by a predetermined angle.

4. The locking device according to claim 3, wherein the locking device further comprises:

Two connecting plates respectively disposed on front and rear sides of the driving assembly and respectively connected to the housing; and a pin, two ends of the pin are supported between the two connecting plates, wherein the driving assembly is pivotally disposed on the pin.

The locking device according to claim 1, wherein a front side of the left end of the bolt forms a first inclined surface and a straight line portion that is in contact with the first inclined surface and is located to the right of the first inclined surface.

The locking device according to claim 5, wherein a rear side of the left end of the bolt forms a second inclined surface, wherein a length of the first inclined surface extending in the left-right direction is smaller than the second inclined surface a length extending in the left-right direction, and an inclination angle of the first slope with respect to the left-right direction and an inclination angle of the second slope with respect to the left-right direction are substantially equal.

The lock device according to any one of claims 1 to 6, wherein the lock tongue has a cylindrical shape in which the axis is in the left-right direction, and the shoulder is formed around the lock tongue.

The locking device according to claim 7, wherein the housing is a hollow cylinder whose axis is in the left-right direction, and an annular boss is formed on the peripheral wall of the chamber adjacent to the right side wall thereof, wherein The elastic member is a compression spring, and a rear end of the compression spring abuts against a front surface of the boss.

9. The locking device according to claim 1, wherein the locking device further comprises:

An end cap, wherein a left side of the housing is open and the end cap encloses a left side of the housing, and the opening is formed on the end cap.

10. The locking device according to claim 2, wherein an upper portion of the push rod is coupled to the bolt by a screw.