CN106698214B - Locking device for movable outriggers, outriggers of truck-mounted cranes and truck-mounted cranes - Google Patents

Abstract

The invention discloses a movable support leg locking device, a support leg of a truck-mounted crane and a truck-mounted crane. The locking device of the movable outrigger includes: a bolt assembly and a driving part; the bolt assembly includes a fixed sleeve, a bolt and a reset elastic member; Sliding in the fixed sleeve, the reset elastic member is abutted between the fixed sleeve and the bolt; the first end of the driver is fixedly connected with the bolt, the second end of the driver is located outside the fixed sleeve, and the bolt can be positioned between the driver Driven by it, it moves against the elastic force of the reset elastic member. The device has a simple structure and is easy to operate, simplifies the process of adjusting the position of the movable outrigger relative to the outrigger box, saves the process of deliberately aligning the pin hole of the outrigger box with the pin hole of the movable outrigger, and can easily realize the pinning of the outrigger Insert and pull out, work efficiency is greatly improved.

Description

Locking device for movable outriggers, outriggers of truck-mounted cranes and truck-mounted cranes

technical field

The invention relates to the technical field of cranes, in particular to a movable leg locking device, a truck-mounted crane leg and a truck-mounted crane.

Background technique

According to relevant national standards, all truck-mounted cranes should be designed with outrigger pins. On the one hand, it is to ensure the safety of the truck-mounted crane and prevent the movable outriggers from protruding from the outrigger box during transportation, especially in the chassis of the truck. When turning, it is easy to cause the outrigger to be thrown out of the outrigger box due to centrifugal force, resulting in driving danger. On the other hand, it is to prevent the movable outrigger from stretching and contracting when the crane is hoisting, causing damage to the crane or even a safety accident.

At present, the truck-mounted cranes in the market are all designed with manual latches, and the movable outriggers can be horizontally extended and retracted relative to the outrigger box in the outrigger box, and the top of the outrigger box and the top of the movable outriggers are correspondingly provided with pin holes. When the operator needs to fix the movable outrigger. First, you need to align the pin holes on the outriggers with the pin holes on the outrigger box to insert the pins in.

However, under normal circumstances, the diameter of the pin, the diameter of the pin hole of the outrigger box and the diameter of the pin hole of the movable leg are not much different. Align the outrigger pin holes. For manually stretched movable outriggers, it is usually necessary to repeatedly adjust the position of the movable outriggers to insert the latch, which is time-consuming, laborious and inefficient.

Contents of the invention

The object of the present invention is to provide a locking device for outriggers of a truck-mounted crane and a truck-mounted crane to solve the problem that in the prior art, it is usually necessary to repeatedly adjust the position of the movable outriggers to insert the pin into the pin hole of the outrigger box, which is time-consuming. Laborious, inefficient technical issues.

The invention provides a movable outrigger locking device, which includes a bolt assembly and a driving part; the bolt assembly includes a fixed sleeve, a latch and a reset elastic member; Inside the barrel, the return elastic part is abutted between the fixed sleeve and the bolt; the first end of the driving part is fixedly connected with the bolt, and the second end of the driving part is located outside the fixed sleeve, and the bolt can be driven by the driving part to overcome the Resetting the elastic force movement of the elastic member.

Further, the bolt is in a stepped shape, one end of the restoring elastic member abuts against one end of the fixing sleeve, and the other end abuts against the step of the bolt.

Further, the bolt assembly also includes a baffle; the first end of the fixed sleeve is used for fixed connection with the movable leg, and the baffle is connected to the end of the bolt close to the driving member, and can be connected to the first end of the fixed sleeve. The two ends are abutted; the first end of the driver is connected to the bolt through a fastener, and a connecting hole passing through the fastener is arranged on the baffle; the first end of the driver is connected to the bolt through a fastener, and the baffle There are connecting holes through the fasteners.

Further, the latch assembly also includes an L-shaped support plate; one end of the support plate is connected to the fixed sleeve, and the other end is arranged at a distance from the second end of the fixed sleeve; the first end of the driver passes through the support plate and the latch connect.

Further, the movable leg locking device further includes a handle assembly; the handle assembly includes a bracket, the bracket is used to be fixed outside the movable leg, and the second end of the driving member is hinged to the bracket.

Further, the handle assembly also includes a handle; one end of the handle is rotatably connected to the bracket, and the other end is hinged to the second end of the driving member.

Further, the handle assembly further includes a limiting plate; the limiting plate is connected to the side wall of the bracket, the second end of the driver passes through the limiting plate and is hinged to the handle, and the handle can abut against the limiting plate.

Further, the driving part is a flexible shaft; the first flexible shaft joint of the flexible shaft is connected with the bolt, the second flexible shaft joint of the flexible shaft is hinged with the handle, and the first hose joint of the flexible shaft is fixedly connected with the limit plate.

The invention provides an outrigger of a truck-mounted crane, which includes a long movable outrigger and an outrigger box, and also includes a locking device for the movable outrigger provided by the invention, and the movable outrigger is slidably arranged in the outrigger box , the inner wall of the outrigger box is provided with a plurality of pin holes at intervals along the extension direction of the outrigger box; the fixed sleeve is fixedly connected with the end of the movable outrigger inserted into the outrigger box, and the pin is inserted in the pin hole; when the pin is driven Driven by the piece, when the elastic force of the reset elastic piece is overcome to move, the latch moves in a direction away from the latch hole.

The present invention also provides a truck-mounted crane, including the outrigger legs of the truck-mounted crane provided by the invention.

When using the outrigger locking device of the truck-mounted crane provided by the present invention, the bolt assembly is arranged at one end of the movable outrigger inserted into the outrigger box, the fixed sleeve is connected with the outrigger box, and the first end of the bolt is inserted into the outrigger box. In the pin hole, the movable outrigger and the outrigger box are relatively fixed. When it is necessary to adjust the position of the movable outrigger relative to the outrigger box, the driving part in the linkage assembly is pulled, and the driving part drives the latch to move away from the outrigger box until the latch is disengaged from the pin hole of the outrigger box, thereby making the The operator can pull or push the movable outrigger to adjust its position. During the adjustment process, the driving part can be released. During this process, the reset elastic part is in a compressed state. When the pin reaches the next pin hole of the outrigger box, the reset elastic part will The latch is reset, and the latch is automatically inserted into the latch hole, thereby realizing the relative fixation of the movable outrigger and the outrigger box again. The device has a simple structure and is easy to operate, simplifies the process of adjusting the position of the movable outrigger relative to the outrigger box, saves the process of deliberately aligning the pin holes of the outrigger box with the pin holes of the movable outrigger, and can easily realize the pinning of the outrigger Insert and pull out, work efficiency is greatly improved.

Description of drawings

The drawings constituting a part of the present invention are used to provide a further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the attached picture:

Fig. 1 is a schematic structural view of a movable leg locking device provided by an embodiment of the present invention;

Fig. 2 is a structural schematic diagram of the latch assembly in the movable outrigger locking device shown in Fig. 1;

Fig. 3 is a structural schematic diagram of the handle assembly in the movable outrigger locking device shown in Fig. 1;

Fig. 4 is a schematic structural view of a truck-mounted crane provided by an embodiment of the present invention;

Fig. 5 is a schematic structural diagram of a truck-mounted crane provided by another embodiment of the present invention.

In the figure: 1-bolt assembly; 2-driver; 3-handle assembly; 4-movable outrigger; 5-leg box; 11-fixed sleeve; 12-bolt; ; 15-supporting plate; 31-support; 32-handle; 33-limiting plate.

Detailed ways

It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

Fig. 1 is a schematic structural view of a movable leg locking device provided by an embodiment of the present invention; Fig. 2 is a structural schematic view of a latch assembly in the movable leg locking device shown in Fig. 1 .

As shown in Figures 1 and 2, the present invention provides a locking device for movable legs, including a latch assembly 1 and a driver 2; the latch assembly 1 includes a fixed sleeve 11, a latch 12 and a reset elastic member 13; the fixed sleeve 11 is used for fixed connection with the movable leg, the bolt 12 is passed through the fixed sleeve, and the reset elastic member 13 is abutted between the fixed sleeve 11 and the bolt 12; the first end of the driving member 2 is fixedly connected with the bolt 12, The second end of the driving member 2 is located outside the fixing sleeve 11 , and the latch 12 can move against the elastic force of the restoring elastic member 13 driven by the driving member 2 .

Wherein, the structural form of latch 12 has many kinds, is not only limited to the definition of latch 12 usually in the prior art, can also be bar shape, columnar or plate shape etc., the cross-sectional shape of latch 12 can be circular, square, oval or triangle etc. The latch 12 is used for inserting the movable leg 4 into the leg box 5 so that the movable leg 4 and the leg box 5 are relatively fixed.

There are many types of return elastic elements, such as compression springs, extension springs or leaf springs.

There are various structural forms of the driving member 2, for example: steel wire rope, iron wire or rope and the like.

Driven by the driver 2 , the latch 12 can move against the elastic force of the restoring elastic member 13 , either compressing the restoring elastic member 13 or stretching the restoring elastic member 13 . For example: along the direction in which the driver 2 pulls the bolt 12 to move, one of the two ends of the fixed sleeve 11 is the first end, the other end is the second end, and one of the two ends of the bolt 12 is the first end and the other end is the The second end; when the return elastic member 13 abuts between the first end of the fixed sleeve 11 and the first end of the bolt 12, the return elastic member 13 is stretched, in this case, it can be at the first end of the bolt 12 Two ends are provided with protrusions to be able to insert the leg box 5; when the reset elastic member 13 abuts between the second end of the fixed sleeve 11 and the second end of the bolt 12, the reset elastic member 13 is compressed, and the bolt 12 The first end can be used for plugging with the outrigger box 5 .

When the movable leg 4 locking device provided by the present invention is used, the fixed sleeve 11 is fixed on the outer movable leg 4 , and in the locked state, the latch 12 is inserted in the latch hole of the leg box 5 . When it is necessary to adjust the position of the movable leg 4 relative to the leg box 5, pull the driver 2 so that the driver 2 drives the latch 12 to overcome the elastic movement of the reset elastic member 13 until the latch 12 and the latch hole of the leg box 5 disengagement; when the bolt 12 is disengaged from the pin hole of the outrigger box 5, the operator can push or pull the movable outrigger 4 to expand and contract relative to the outrigger box 5, so as to adjust the position of the movable outrigger 4 relative to the outrigger box 5. During the adjustment process, if the pulling force applied to the driver 2 is removed, the latch 12 loses the external force. When reaching the next latch hole of the outrigger box 5, the latch 12 is automatically inserted into the latch hole under the elastic force of the reset elastic member 13. Movable support leg 4 is locked relative to support leg box 5.

The movable leg 4 locking device provided by this embodiment has a simple structure and is easy to operate, which simplifies the process of adjusting the position of the movable leg 4 relative to the outrigger box 5, and eliminates the need to deliberately install the pin hole of the leg box 5 and the movable leg. 4. This process of aligning the pin holes can easily realize the insertion and extraction of the pin 12 of the support leg, greatly improving the work efficiency.

As shown in Figure 1 and Figure 2, on the basis of the above embodiment, further, the bolt 12 is stepped, one end of the reset elastic member 13 is in contact with one end of the fixing sleeve 11, and the other end is in contact with the step of the bolt 12. catch.

In this embodiment, the bolt 12 is in a stepped shape, and the shaft section with a larger diameter is a large-diameter shaft section, and the shaft section with a smaller diameter is a small-diameter shaft section. Along the direction in which the driving member 2 pulls the bolt 12, the large-diameter shaft section can be arranged upstream, and the small-diameter shaft section can be arranged downstream. One end of the reset elastic member 13 is in contact with the first end of the fixed sleeve 11, and the other end is in contact with the bolt 12. The step of the large-diameter shaft section is close to the annular end face of the small-diameter shaft section. In this case, when the latch 12 is pulled, the reset elastic member 13 is stretched; along the direction in which the driver 2 pulls the latch 12, the large The diameter shaft section can also be arranged downstream, and the small diameter shaft section is arranged upstream, and one end of the reset elastic member 13 abuts against the second end of the fixed sleeve 11, and the other end and the step of the latch 12, that is, the large diameter shaft section is close to the small diameter shaft section In this case, when the bolt 12 is pulled, the return elastic member 13 is compressed.

The latch 12 adopts a stepped shape, has a simple structure, is convenient to process, and facilitates the setting of the elastic element.

As shown in Figures 1 and 2, on the basis of the above embodiments, further, the bolt 12 assembly 1 further includes a baffle 14; the first end of the fixed sleeve 11 is used for fixed connection with the movable leg 4, and the The baffle 14 is connected to one end of the bolt 12 close to the driver 2, and can abut against the second end of the fixed sleeve 11; the first end of the driver 2 is connected to the bolt 12 through a fastener, and the baffle 14 is provided with a connecting hole passing through the fastener.

In this embodiment, when the reset elastic member 13 pushes the latch 12 to reset, when the latch 12 moves to a preset distance (this distance can be that the latch 12 is inserted into the latch hole of the leg box 5), the baffle plate 14 and the fixed sleeve The second end of the barrel 11 abuts to prevent the bolt 12 from continuing to move, prevent the bolt 12 from completely detaching from the fixing sleeve 11 and make the locking invalid, and also prevent the end of the bolt 12 close to the driving member 2 from detaching from the second end of the fixing sleeve 11 , so as to avoid that when the driver 2 pulls the bolt 12 to move, the bolt 12 is inclined and cannot slide outward from the second end of the fixed sleeve 11, so that the bolt 12 is stuck, so that the other end of the bolt 12 cannot be separated from the leg box 5 Pin hole.

As shown in Figures 1 and 2, on the basis of the above embodiments, further, the latch assembly 1 further includes an L-shaped support plate 15; one end of the support plate 15 is connected to the fixed sleeve 11, and the other end is connected to the fixed sleeve The second end of the barrel 11 is facing and spaced apart; the first end of the driving member 2 passes through the supporting plate 15 and is connected with the bolt 12 .

In this embodiment, the driver 2 passes through the end of the supporting plate 15 that is opposite to the second end of the fixed sleeve 11 and then connects with the bolt 12, so that the part of the driving member 2 that is located between the supporting plate 15 and the bolt 12 Consistent with the sliding direction of the bolt 12 along the fixed sleeve 11, the movement of the driving member 2 pulling the bolt 12 is smoother, more labor-saving and more efficient.

Fig. 3 is a structural schematic diagram of the handle assembly in the movable leg locking device shown in Fig. 1 . As shown in Figure 1 and Figure 3, on the basis of the above embodiment, further, the movable leg locking device further includes a handle assembly 3; , the second end of the driver 2 is hinged to the bracket 31 .

When using the locking device for the movable leg 4 provided in this embodiment, the bracket 31 can be fixed on the end of the movable leg 4 away from the leg box 5 , and can also be fixed on the fixed leg connected to the movable leg 4 . When the second end of the driver 2 is hinged to the bracket 31, when it is necessary to adjust the position of the movable leg 4 relative to the leg box 5, the driver 2 is pulled to rotate relative to the bracket 31. After the latch 12 breaks away from the latch hole, It only needs to remove the external force on the second end of the driving part 2, and there is no need to fix or organize the second end of the driving part 2, which is convenient for use.

As shown in FIG. 1 and FIG. 3 , on the basis of the above embodiments, the handle assembly 3 further includes a handle 32 ;

In this embodiment, when it is necessary to adjust the position of the movable outrigger 4 relative to the outrigger box 5, the handle 32 is rotated clockwise relative to the bracket 31, thereby pulling the driving member 2, and then pulling the latch 12 to overcome the movement of the reset elastic member 13, Finally, it is released from the pin hole. During the process of adjusting the movable outrigger 4, the external force exerted on the handle 32 can be removed.

As shown in Figure 1 and Figure 3, on the basis of the above embodiment, further, the handle assembly 3 further includes a limiting plate 33; the limiting plate 33 is connected to the side wall of the bracket 31, and the second end of the driving member 2 passes through The limit plate 33 is hinged to the handle 32 , and the handle 32 can abut against the limit plate 33 .

In this embodiment, during the reset process of the bolt 12 under the elastic force of the reset elastic member 13, when the bolt 12 moves a predetermined distance, the limit plate 33 abuts against the handle 32, preventing the handle 32 from continuing to rotate, and giving the handle 32 a limit. position, which is convenient for the operator to use.

As shown in Figure 1 and Figure 3, on the basis of the above embodiment, further, the driving member 2 is a flexible shaft; the first flexible shaft joint of the flexible shaft is connected to the latch 12, and the second flexible shaft joint of the flexible shaft is connected to the handle 32 is hinged, and the first hose joint of the flexible shaft is fixedly connected with the limiting plate 33.

In this embodiment, the driving part 2 adopts a flexible shaft, which is easy to install and reliable in transmission, which can ensure the normal operation of the locking device of the movable leg 4 .

Fig. 4 is a schematic structural diagram of a truck-mounted crane provided by one embodiment of the present invention; Fig. 5 is a schematic structural diagram of a truck-mounted crane provided by another embodiment of the present invention.

As shown in Figure 4, the present invention provides an outrigger of a truck-mounted crane, including elongated movable outriggers 4 and outrigger boxes 5, as well as the movable outrigger locking device provided by the present invention, the movable outrigger The legs 4 are slidingly arranged in the outrigger box 5, and the inner wall of the outrigger box 5 is provided with a plurality of pin holes at intervals along the extending direction of the outrigger box 5; the fixed sleeve 11 and the movable outrigger 4 are inserted into one end of the outrigger box 5 Fixedly connected, the latch 12 is inserted in the latch hole; when the latch 12 is driven by the driver 2 and overcomes the elastic force of the reset elastic member 13 to move, the latch 12 moves toward the direction away from the latch hole.

Wherein, the fixed sleeve 11 can be connected with the end face of one end of the movable leg 4 inserted into the leg box 5, and a cavity can also be formed in the movable leg 4, and the fixed sleeve 11 is fixed on the upper bottom of the inner cavity of the movable leg 4 , the lower bottom or the side wall, correspondingly, the latch hole on the leg box 5 can be arranged on the upper bottom, the lower bottom or the side wall of the leg box 5.

Preferably, the fixed sleeve 11 is fixed on the lower bottom of the inner cavity of the movable leg 4, and the pin hole is arranged on the lower bottom of the leg box 5, which avoids setting the fixed sleeve 11 in the inner cavity of the movable leg 4. The side wall of the cavity is inconvenient for the driver 2 to pull the latch 12 to move, and it also avoids the gravity of the latch 12 to be overcome by the reset elastic member 13 when the fixed sleeve 11 is arranged on the upper bottom of the inner cavity of the movable leg 4.

When it is necessary to adjust the position of the movable leg 4 relative to the leg box 5, pull the driver 2 so that the driver 2 drives the latch 12 to overcome the elastic movement of the reset elastic member 13 until the latch 12 and the latch hole of the leg box 5 disengagement; when the bolt 12 is disengaged from the pin hole of the outrigger box 5, the operator can push or pull the movable outrigger 4 to expand and contract relative to the outrigger box 5, so as to adjust the position of the movable outrigger 4 relative to the outrigger box 5. During the adjustment process, if the pulling force applied to the driver 2 is removed, the latch 12 loses the external force. When reaching the next latch hole of the outrigger box 5, the latch 12 is automatically inserted into the latch hole under the elastic force of the reset elastic member 13. Movable support leg 4 is locked relative to support leg box 5.

The movable outrigger 4 of the truck-mounted crane provided by this embodiment is easy to adjust and has high working efficiency.

The present invention also provides a truck-mounted crane, including the outrigger legs of the truck-mounted crane provided by the invention. Also included is a crane base to which crane outriggers are attached.

In the truck-mounted crane provided by the present invention, when the position of the movable outrigger 4 on the truck-mounted crane relative to the outrigger box 5 needs to be adjusted, the driver 2 is pulled so that the driver 2 drives the latch 12 to overcome the elastic force of the return elastic member 13 until the bolt 12 is disengaged from the pin hole of the outrigger box 5; when the bolt 12 is disengaged from the pin hole of the outrigger box 5, the operator can push or pull the movable outrigger 4 to expand and contract relative to the outrigger box 5 to adjust the activity During the adjustment of the position of the outrigger 4 relative to the outrigger box 5, if the pulling force applied to the driver 2 is removed, the latch 12 loses the external force. Under the elastic force of the part 13, it is automatically inserted into the latch hole, so that the movable support leg 4 is locked relative to the support leg box 5. The adjustment process is simple and convenient, and the efficiency is high.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (8)

1. A locking device for movable outriggers, comprising: a latch assembly and a driver; The latch assembly includes a fixed sleeve, a latch and a reset elastic member; the fixed sleeve is used for fixed connection with the movable leg, the latch is passed through the fixed sleeve, and can be placed in the fixed sleeve Sliding inside, the return elastic member abuts between the fixing sleeve and the latch; The first end of the driving part is fixedly connected with the bolt, the second end of the driving part is located outside the fixed sleeve, and the bolt can overcome the reset elastic part driven by the driving part elastic movement of It also includes a handle assembly; the handle assembly includes a bracket, the bracket is used to be fixed outside the movable leg, and the second end of the driver is hinged to the bracket; The handle assembly also includes a handle; one end of the handle is rotatably connected to the bracket, and the other end is hinged to the second end of the driving member. 2. The locking device for movable outriggers according to claim 1, wherein the pin is in a stepped shape, one end of the reset elastic member abuts against one end of the fixing sleeve, and the other end abuts against the fixed sleeve. The step abutment of the latch. 3. The locking device for movable outriggers according to claim 2, wherein the latch assembly further comprises a baffle; the first end of the fixed sleeve is used for fixed connection with the movable outrigger, and the baffle is connected with the movable outrigger One end of the bolt close to the driver is connected, and can abut against the second end of the fixed sleeve; the first end of the driver is connected to the bolt through a fastener, and the baffle is provided with a passing fastener the connecting hole; The first end of the driving member is connected to the bolt through a fastener, and a connection hole passing through the fastener is provided on the baffle. 4. The movable outrigger locking device according to claim 3, wherein the latch assembly further comprises an L-shaped support plate; one end of the support plate is connected to the fixed sleeve, and the other end is connected to the fixed sleeve. The second end of the fixed sleeve is arranged oppositely and at intervals; The first end of the driving member passes through the supporting plate and is connected with the bolt. 5. The movable outrigger locking device according to claim 1, wherein the handle assembly further comprises a limit plate; the limit plate is connected to the side wall of the bracket, and the first drive member The two ends pass through the limiting plate and are hinged to the handle, and the handle can abut against the limiting plate. 6. The movable outrigger locking device according to claim 5, wherein the driving member is a flexible shaft; the first flexible shaft joint of the flexible shaft is connected to the bolt, and the first flexible shaft joint of the flexible shaft The two flexible shaft joints are hinged to the handle, and the first hose joint of the flexible shaft is fixedly connected to the limiting plate. 7. An outrigger of a truck-mounted crane, including a long movable outrigger and an outrigger box, characterized in that it also includes a movable outrigger locking device according to any one of claims 1-6 , the movable outriggers are slidably arranged in the outrigger box, and the inner wall of the outrigger box is provided with a plurality of bolt holes at intervals along the extension direction of the outrigger box; the fixed sleeve and the movable One end of the outrigger inserted into the outrigger box is fixedly connected, and the pin is inserted in the pin hole; When the bolt is driven by the driving member and moves against the elastic force of the reset elastic member, the bolt moves toward a direction away from the bolt hole. 8. A truck-mounted crane, comprising the outrigger of the truck-mounted crane according to claim 7.