Automatic locking mechanism and method for movable supporting leg, supporting leg structure and engineering equipment

Abstract

The invention provides a movable supporting leg automatic locking mechanism and method, a supporting leg structure and engineering equipment, the movable supporting leg automatic locking mechanism comprises a movable supporting leg automatic locking device, the movable supporting leg automatic locking device comprises a fixed support, a plug pin, an elastic piece and a follow-up assembly, and the plug pin is in sliding connection with the fixed support; the elastic piece is arranged between the bolt and the fixed support, and the follow-up assembly is at least connected with the bolt; when the telescopic supporting leg stretches out, the telescopic supporting leg drives the plug pin to move in the locking direction through the follow-up assembly, and the movable supporting leg and the frame are locked through the plug pin. And when the telescopic supporting leg retracts, the plug pin moves towards the unlocking direction under the elastic force action of the elastic piece, so that the plug pin unlocks the movable supporting leg and the frame. According to the automatic locking mechanism for the movable supporting leg, the movable supporting leg and the frame can be automatically locked and unlocked while the telescopic supporting leg stretches out and draws back, manual operation is not needed, and the problems of operation potential safety hazards, part damage and the like caused by forgetting to insert or pull out a plug pin can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of movable outrigger locking structure, in particular to a movable outrigger automatic locking mechanism and method, an outrigger structure and engineering equipment. BACKGROUND

[0002] The truck crane is generally provided with a telescopic movable outrigger, and the main function of the movable outrigger is to increase the support spacing of the truck crane frame to improve the stability and lifting capacity of the truck crane.

[0003] In order to ensure the safety of the truck crane, a latch is generally provided on the truck crane, and when the movable outrigger is horizontally extended and the telescopic legs on the movable outrigger are extended downward and supported on the ground, the latch is manually inserted into the latch hole on the movable outrigger and the frame to limit the movable outrigger through the latch, so as to avoid accidents such as rollover caused by the retraction of the movable outrigger.

[0004] However, the manual latch has the following disadvantages: 1. During operation, the latch needs to be manually inserted, and after the operation is completed, the latch needs to be manually pulled out, which is inconvenient to use; 2. After the movable outrigger is extended, if the operator forgets to insert the latch, there is a safety hazard when the crane is operating; 3. After the crane operation is completed, if the operator forgets to pull out the latch and performs the leg retraction action (i.e. the movable outrigger is retracted), the un-pulled-out latch will jam the movable outrigger, making the movable outrigger unable to retract, which is easy to cause damage to the movable outrigger, the frame and other components. SUMMARY

[0005] The purpose of the present application is to provide a movable outrigger automatic locking mechanism, which can automatically complete the locking and unlocking of the movable outrigger and the frame while the telescopic legs are extended and retracted, without manual operation, and can avoid the operation safety hazards, component damage and other problems caused by forgetting to insert or pull out the latch.

[0006] The present application provides a movable outrigger automatic locking mechanism, comprising a movable outrigger automatic locking device, the movable outrigger automatic locking device comprising a fixed support, a latch, an elastic member and a follow-up assembly, the fixed support being fixedly installed on the movable outrigger or the frame; the latch being in sliding connection with the fixed support, the latch having opposite locking and unlocking directions, and the latch being capable of moving relative to the fixed support along the locking and unlocking directions; the elastic member being arranged between the latch and the fixed support, and the elastic member being used for applying an elastic force to the latch in the unlocking direction; the follow-up assembly being connected with at least the latch, and the follow-up assembly being used for connecting with the telescopic legs on the movable outrigger; When the telescopic leg is extended, the telescopic leg drives the latch to move towards the locking direction through the follow-up assembly, so that the latch locks the movable support leg and the vehicle frame; when the telescopic leg is retracted, the latch moves towards the unlocking direction under the elastic force of the elastic member, so that the latch unlocks the movable support leg and the vehicle frame.

[0007] Further, the fixed support includes a sleeve, at least part of the latch is located in the sleeve, and the latch is capable of sliding along the axial direction of the sleeve; an end of the latch along the locking direction is a plug-in part; When the latch moves towards the locking direction, the plug-in part is capable of extending out of the sleeve and locking the movable support leg and the vehicle frame; when the latch moves towards the unlocking direction, at least part of the plug-in part is capable of retracting into the sleeve and unlocking the movable support leg and the vehicle frame.

[0008] Further, the elastic member is a spring, the elastic member is located between the inner side wall of the sleeve and the outer side wall of the latch, a first stop part is arranged on the outer side wall of the latch, a second stop part is arranged on the inner side wall of the sleeve, and the two ends of the elastic member are respectively in abutment with the first stop part and the second stop part; when the latch moves towards the locking direction, the elastic member is capable of being compressed to store force.

[0009] Further, an end of the sleeve along the locking direction is provided with a first opening, the first opening is used for extending the plug-in part out of the sleeve; the fixed support further includes a support seat, the support seat is fixedly connected with the end of the sleeve close to the first opening, and the support seat is used for being fixedly installed on the movable support leg or the vehicle frame.

[0010] Further, the follow-up assembly is a connecting rod assembly, the follow-up assembly includes a first connecting rod, a second connecting rod and a connecting piece, a first end of the first connecting rod is hingedly connected with an end of the latch away from the plug-in part, a first end of the second connecting rod is hingedly connected with an end of the sleeve along the locking direction, and a second end of the first connecting rod is hingedly connected with a second end of the second connecting rod; the connecting piece is connected with the hinged parts of the first connecting rod and the second connecting rod, and the connecting piece is used for being connected with the telescopic leg.

[0011] Further, an outer side wall of an end of the latch away from the plug-in part is provided with a first connecting seat, an outer side wall of an end of the sleeve along the locking direction is provided with a second connecting seat, the first end of the first connecting rod is hingedly connected with the first connecting seat, and the first end of the second connecting rod is hingedly connected with the second connecting seat; The side wall of the sleeve is provided with an avoiding hole, the avoiding hole is a long strip structure extending along the axial direction of the sleeve, and the avoiding hole penetrates the end face of one end of the sleeve in the unlocking direction, and the first connecting seat extends out of the sleeve through the avoiding hole; when the bolt slides along the axial direction of the sleeve, the first connecting seat can move in the avoiding hole.

[0012] Further, the movable leg automatic locking mechanism further comprises a pull rope, and the follow-up assembly is connected with the telescopic leg through the pull rope.

[0013] The application also provides a movable leg automatic locking method based on the movable leg automatic locking mechanism, and the movable leg automatic locking method comprises the following steps: The telescopic leg is extended, the telescopic leg applies a pulling force to the follow-up assembly, the follow-up assembly drives the bolt to move towards the locking direction under the action of the pulling force of the pull rope, and the bolt locks the movable leg and the vehicle frame; The telescopic leg is retracted, the telescopic leg removes the pulling force applied to the follow-up assembly, and the bolt moves towards the unlocking direction under the action of the elastic force of the elastic member, so that the bolt releases the locking of the movable leg and the vehicle frame.

[0014] The application also provides a leg structure comprising a movable leg and the movable leg automatic locking mechanism, and the movable leg is provided with a telescopic leg; the movable leg automatic locking device is arranged in the movable leg, and the fixed support is fixedly installed on the movable leg; the movable leg is provided with a through hole, and the movable leg is provided with a rope supporting frame near the through hole; one end of the pull rope is connected with the follow-up assembly, and the other end of the pull rope passes through the through hole to the outside of the movable leg after winding around the rope supporting frame and is connected with the telescopic leg.

[0015] The application also provides an engineering equipment comprising the leg structure.

[0016] The movable leg automatic locking mechanism provided by the application can realize the automatic plugging and unplugging of the bolt by setting the fixed support, the bolt, the elastic member and the follow-up assembly, connecting the follow-up assembly with the telescopic leg of the movable leg, and using the telescopic movement of the telescopic leg itself and the elastic force of the elastic member, thereby realizing the automatic locking and unlocking of the bolt to the movable leg and the vehicle frame, so that the bolt does not need to be manually operated, and the complex driving device and control device do not need to be additionally set, the safety hidden danger caused by the operator forgetting to plug in the bolt during operation is eliminated, and the risk that the movable leg cannot be retracted, the movable leg and the vehicle frame are damaged and the like caused by the operator forgetting to pull out the bolt after the operation is completed is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The figure is a structural schematic diagram of the automatic locking device of the movable support leg in the embodiment of the present application.

[0018] Figure 2 The figure is a structural schematic diagram of the explosion. Figure 1

[0019] Figure 3 The figure is a sectional schematic diagram of the automatic locking device of the movable support leg in the embodiment of the present application in the locked state.

[0020] Figure 4 The figure is a sectional schematic diagram of the automatic locking device of the movable support leg in the embodiment of the present application in the unlocked state.

[0021] Figure 5 The figure is a structural schematic diagram of the support leg structure in the embodiment of the present application when the automatic locking mechanism of the movable support leg is in the locked state.

[0022] Figure 6 The figure is a structural schematic diagram of the support leg structure in the embodiment of the present application when the automatic locking mechanism of the movable support leg is in the unlocked state. DETAILED DESCRIPTION

[0023] The specific embodiments of the present application are described in further detail below in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0024] The terms "first", "second", "third", "fourth" and the like (if any) in the description and claims of the present application are used to distinguish similar objects, and do not necessarily have to be used to describe a particular order or sequence.

[0025] The terms "up", "down", "left", "right", "front", "back", "top", "bottom" and the like (if any) in the description and claims of the present application are defined with the structure in the figure and the position of the structure relative to each other, only to express the technical solution clearly and conveniently. It should be understood that the use of the terms should not limit the scope of the application claimed.

[0026] As Figures 1 to 6 ​As shown, this embodiment of the invention provides an automatic locking mechanism for a movable outrigger 6, used for automatically locking and unlocking the movable outrigger 6 to the frame 5. The automatic locking mechanism includes an automatic locking device 100, which comprises a fixed support 1, a pin 2, an elastic element 3, and a follower assembly 4. The fixed support 1 is fixedly mounted on the movable outrigger 6 or the frame 5. The pin 2 is slidably connected to the fixed support 1, and has opposite locking directions S1 and unlocking directions S2. The pin 2 is movable relative to the fixed support 1 along the locking direction S1 and unlocking direction S2. The pin 2 has a cylindrical structure, and the locking direction S1 and unlocking direction S2 are parallel to the axial direction of the pin 2. The elastic element 3 is disposed between the pin 2 and the fixed support 1, and applies a spring force to the pin 2 in the unlocking direction S2. The follower assembly 4 is at least connected to the pin 2 and is used to connect to the telescopic outrigger 7 on the movable outrigger 6.

[0027] Among them, the movable support leg 6 can extend and retract horizontally relative to the frame 5, and the telescopic support foot 7 can extend and retract vertically relative to the movable support leg 6 (for details on the movement and working principle of the movable support leg 6 and the telescopic support foot 7, please refer to existing technologies, such as patents like CN201580922U, which will not be elaborated here). Figure 3 and Figure 5 As shown, when the telescopic outrigger 7 extends downward, it applies a pulling force to the follower assembly 4. The telescopic outrigger 7, through the follower assembly 4, drives the pin 2 to move in the locking direction S1, thus locking the movable outrigger 6 and the frame 5. Figure 4 and Figure 6 As shown, when the telescopic outrigger 7 retracts upward, the telescopic outrigger 7 removes the pulling force applied to the follower component 4, and the pin 2 moves in the unlocking direction S2 under the elastic force of the elastic element 3, so that the pin 2 releases the lock on the movable outrigger 6 and the frame 5.

[0028] The automatic locking mechanism for the movable outrigger provided in this embodiment of the invention, by setting a fixed support 1, a pin 2, an elastic element 3, and a follower component 4, with the follower component 4 connected to the telescopic outrigger 7 on the movable outrigger 6, utilizes the telescopic movement of the telescopic outrigger 7 itself and the elastic force of the elastic element 3 to realize the automatic insertion and removal action of the pin 2 (i.e., relying on the mechanical movement of the telescopic outrigger 7 itself to lock the pin 2), thereby realizing the automatic locking and unlocking of the movable outrigger 6 and the frame 5 by the pin 2. In this way, no manual operation of the pin 2 is required, saving time and effort, and no additional complex drive and control devices are required. At the same time, it eliminates the safety hazards caused by the operator forgetting to insert the pin 2 during operation, and also avoids the risk of the movable outrigger 6 not being able to retract, the movable outrigger 6 and the frame 5 being stuck and damaged because the operator forgot to remove the pin 2 after the operation.

[0029] Specifically, the movable support leg 6 is provided with a first locking hole 60, and the frame 5 is provided with a second locking hole 50. For example... Figure 3 and Figure 5 As shown, during operation, the movable support leg 6 extends horizontally relative to the frame 5. After the movable support leg 6 extends to its full position, the first locking hole 60 on the movable support leg 6 corresponds to the second locking hole 50 on the frame 5. Then, the telescopic support leg 7 extends downward relative to the movable support leg 6 and finally supports the ground. During the downward extension of the telescopic support leg 7, the telescopic support leg 7 drives the pin 2 to move in the locking direction S1 through the follower component 4, so that the pin 2 is simultaneously inserted into the first locking hole 60 and the second locking hole 50, thereby automatically locking the movable support leg 6 and the frame 5. Figure 4 and Figure 6 As shown, after the operation is completed, the telescopic outrigger 7 retracts upward relative to the movable outrigger 6. During this process, the telescopic outrigger 7 removes the tension applied to the follower component 4, and the pin 2 moves in the unlocking direction S2 under the elastic force of the elastic element 3, causing the pin 2 to be pulled out from the first locking hole 60 and the second locking hole 50, thereby automatically releasing the lock on the movable outrigger 6 and the frame 5. Since the telescopic movement of the movable outrigger 6 and the telescopic outrigger 7 are actions that the construction machinery itself needs to perform during operation, the movable outrigger automatic locking device 100 in this embodiment can achieve locking and unlocking actions by relying on the mechanical movement of the construction machinery itself.

[0030] Furthermore, such as Figures 1 to 6 As shown, in this embodiment, the fixed support 1 includes a sleeve 11, which is a hollow cylindrical structure with openings at both ends. At least part of the pin 2 is located inside the sleeve 11 (i.e., the pin 2 can be partially located inside the sleeve 11, or the entire pin 2 can be located inside the sleeve 11). The pin 2 can slide along the axial direction of the sleeve 11 within the sleeve 11. One end of the pin 2 along the locking direction S1 is a insertion part 21.

[0031] like Figure 3 and Figure 5 As shown, when the pin 2 moves in the locking direction S1, the insertion part 21 can extend out of the sleeve 11 and lock the movable support leg 6 and the frame 5; Figure 4 and Figure 6 As shown, when the pin 2 moves in the unlocking direction S2, at least a portion of the insertion part 21 can retract into the sleeve 11 and release the locking of the movable outrigger 6 and the frame 5. In this embodiment, when the movable outrigger automatic locking device 100 is in the unlocked state, the entire insertion part 21 retracts into the sleeve 11; of course, in other embodiments, when the movable outrigger automatic locking device 100 is in the unlocked state, only a portion of the insertion part 21 may retract into the sleeve 11.

[0032] Furthermore, such as Figures 1 to 4As shown, in this embodiment, the outer diameter of the pin 2 is smaller than the inner diameter of the sleeve 11. The elastic element 3 is a spring, located inside the sleeve 11 and sleeved outside the pin 2, that is, the elastic element 3 is located between the inner wall of the sleeve 11 and the outer wall of the pin 2. A first stop portion 22 is provided on the outer wall of the pin 2, which is located near one end of the pin 2 along the unlocking direction S2. A second stop portion 111 is provided on the inner wall of the sleeve 11, which is located near one end of the sleeve 11 along the locking direction S1. The two ends of the elastic element 3 abut against the first stop portion 22 and the second stop portion 111, respectively. When the pin 2 moves toward the locking direction S1, the elastic element 3 can compress and store force; thus, the elastic element 3 can apply a spring force to the pin 2 toward the unlocking direction S2.

[0033] Specifically, in this embodiment, the first stop 22 is an annular structure arranged along the circumference of the pin 2. The first stop 22 and the pin 2 can be fixed by welding or be an integral structure. The second stop 111 is an annular structure arranged along the circumference of the sleeve 11. The second stop 111 and the sleeve 11 can be fixed by welding or be an integral structure. Of course, in other embodiments, the first stop 22 and the second stop 111 can also be non-annular structures. In addition to serving as abutment and limiting for the elastic member 3, the first stop 22 and the second stop 111 can also prevent or reduce the lateral movement of the pin 2 relative to the sleeve 11. Specifically, since the inner wall of the sleeve 11 and the outer wall of the pin 2 need to reserve space for the installation of the elastic element 3, the outer diameter of the pin 2 is smaller than the inner diameter of the sleeve 11. If the first stop 22 and the second stop 111 are not provided, the gap between the inner wall of the sleeve 11 and the outer wall of the pin 2 will be large. When the pin 2 is subjected to the pulling force of the follower component 4, it will cause the pin 2 to move left and right in the sleeve 11, which is not conducive to the stable movement of the pin 2 and will also increase the wear of the automatic locking device 100 of the movable support leg. By providing the first stop 22 and the second stop 111, the first stop 22 is close to or in contact with the inner wall of the sleeve 11, and the second stop 111 is close to or in contact with the outer wall of the pin 2. That is, the first stop 22 and the second stop 111 form two support parts, thereby preventing or reducing the left and right movement of the pin 2 relative to the sleeve 11. In one embodiment, the outer diameter of the first stop portion 22 is the same as the inner diameter of the sleeve 11, or the outer diameter of the first stop portion 22 is slightly smaller than the inner diameter of the sleeve 11; the inner diameter of the second stop portion 111 is the same as the outer diameter of the pin 2, or the inner diameter of the second stop portion 111 is slightly larger than the outer diameter of the pin 2.

[0034] Furthermore, such as Figures 1 to 4As shown, in this embodiment, one end of the sleeve 11 along the locking direction S1 is provided with a first opening 11A, which allows the insertion part 21 to extend out of the sleeve 11; that is, when the pin 2 moves in the locking direction S1, the insertion part 21 can extend out of the sleeve 11 through the first opening 11A. The fixed support 1 also includes a support base 12, which is fixedly connected to the end of the sleeve 11 near the first opening 11A, and the support base 12 does not obstruct the first opening 11A. The support base 12 is used to be fixedly installed on the movable support leg 6 or the frame 5. Specifically, in this embodiment, the support base 12 is a support plate, and the support base 12 and the sleeve 11 can be fixed by welding; the support base 12 is provided with screw holes (not labeled in the figure), and the support base 12 is fixedly installed on the movable support leg 6 or the frame 5 by bolts. Of course, in other embodiments, the support base 12 can also be in other structural forms.

[0035] Furthermore, such as Figures 1 to 4 As shown, in this embodiment, the pin 2 is a hollow structure, thereby reducing its weight and lowering costs. Of course, in other embodiments, the pin 2 can also be a solid structure.

[0036] Furthermore, such as Figures 1 to 4 As shown, in this embodiment, the follower component 4 is a linkage assembly. The follower component 4 is hinged to the pin 2 and the fixed support 1 respectively. Specifically, the follower component 4 is hinged to one end of the pin 2 along the unlocking direction S2 and one end of the fixed support 1 along the locking direction S1 respectively. The follower component 4 can convert the pulling force applied by the telescopic leg 7 into the driving force for the pin 2 to move along the locking direction S1.

[0037] Furthermore, such as Figures 1 to 4 As shown, in this embodiment, the follower assembly 4 is located outside the sleeve 11. The follower assembly 4 includes a first connecting rod 41, a second connecting rod 42, and a connector 43. The first end of the first connecting rod 41 is hinged to the end of the pin 2 away from the insertion part 21. The first end of the second connecting rod 42 is hinged to one end of the sleeve 11 along the locking direction S1 (i.e., the end near the first opening 11A). The second end of the first connecting rod 41 is hinged to the second end of the second connecting rod 42. The first connecting rod 41 and the second connecting rod 42 are arranged in a V-shape. The connector 43 is connected to the hinged part of the first connecting rod 41 and the second connecting rod 42, and the connector 43 is used to connect to the telescopic support leg 7.

[0038] Furthermore, such as Figures 1 to 4As shown, in this embodiment, a first connecting seat 23 is provided on the outer wall of the end of the pin 2 away from the insertion part 21, and the first connecting seat 23 and the pin 2 can be fixed by welding; a second connecting seat 112 is provided on the outer wall of one end of the sleeve 11 along the locking direction S1, and the second connecting seat 112 and the sleeve 11 can be fixed by welding; the first end of the first connecting rod 41 is hinged to the first connecting seat 23, and the first end of the second connecting rod 42 is hinged to the second connecting seat 112. In this embodiment, the first connecting seat 23 and the first stop part 22 are arranged close to each other, and the first connecting seat 23 is located on the side of the first stop part 22 facing the unlocking direction S2.

[0039] The sleeve 11 has a second opening 11B at one end along the unlocking direction S2. A clearance hole 113 is provided on the side wall of the sleeve 11, penetrating the side wall of the sleeve 11 (i.e., the clearance hole 113 penetrates both the inner and outer surfaces of the sleeve 11). The first connecting seat 23 extends out of the sleeve 11 through the clearance hole 113. The clearance hole 113 is an elongated structure extending axially along the sleeve 11, and it penetrates the end face of the sleeve 11 at one end along the unlocking direction S2, i.e., the clearance hole 113 penetrates the end face of the sleeve 11 near the second opening 11B, but does not penetrate the end face of the sleeve 11 at one end along the locking direction S1. This facilitates the installation of the pin 2 into the sleeve 11 through the second opening 11B, and also facilitates the installation of the first connecting seat 23 into the clearance hole 113. When the pin 2 slides along the axial direction of the sleeve 11, the first connecting seat 23 can move within the clearance hole 113. The clearance hole 113 not only provides clearance for the movement of the first connecting seat 23, but also guides the movement of the first connecting seat 23, enabling the pin 2 to move more stably along the set path.

[0040] Specifically, when the telescopic outrigger 7 extends downward, it applies a pulling force to the connector 43. At this time, the connector 43 moves diagonally downward, and the second link 42 rotates around the second connecting seat 112 under the pulling force of the connector 43. The first link 41 moves under the combined force of the connector 43 and the second link 42, reducing the V-shaped angle between the first link 41 and the second link 42. Simultaneously, the first link 41 drives the pin 2 to move in the locking direction S1, shortening the distance between the first stop 22 and the second stop 111, thereby compressing and storing force in the elastic element 3. When the telescopic outrigger 7 retracts upward, it gradually removes the pulling force applied to the connector 43. The pin 2 moves in the unlocking direction S2 under the elastic force of the elastic element 3, while the V-shaped angle between the first link 41 and the second link 42 increases.

[0041] Furthermore, such as Figures 1 to 4As shown, in this embodiment, the first connecting rod 41 and the first connecting seat 23, the second connecting rod 42 and the second connecting seat 112, and the first connecting rod 41 and the second connecting rod 42 are all hinged by pin assemblies (not labeled in the figure). Each pin assembly includes a pin 45 and a spring pin 46. The pin 45 is inserted into the pin hole of the corresponding hinge part, and the two ends of the pin 45 are limited by the head 451 of the pin 45 and the spring pin 46, respectively, so as to realize the hinge of each component.

[0042] Furthermore, such as Figures 1 to 4 As shown, in this embodiment, the first connecting seat 23 includes a first hinge plate (not labeled in the figure), and two first connecting rods 41. The first ends of the two first connecting rods 41 are located on opposite sides of the first hinge plate, and both first ends of the two first connecting rods 41 are hinged to the first hinge plate. The second connecting seat 112 includes two spaced-apart second hinge plates (not labeled in the figure), and one second connecting rod 42. The first end of the second connecting rod 42 is located between the two second hinge plates, and both first ends of the second connecting rod 42 are hinged to both second hinge plates. The second end of the second connecting rod 42 is located between the second ends of the two first connecting rods 41, and both second ends of the second connecting rod 42 are hinged to both second ends of the first connecting rods 41. This arrangement improves the stability of the follower assembly 4.

[0043] Furthermore, such as Figures 1 to 6 As shown, in this embodiment, the automatic locking mechanism of the movable outrigger also includes a pull rope 8, and the follower component 4 is connected to the telescopic outrigger 7 via the pull rope 8. Specifically, the connector 43 is a spring clip, and the connector 43 is connected to the telescopic outrigger 7 via the pull rope 8. In this embodiment, the second end of the second connecting rod 42 is provided with a transition plate 44. The transition plate 44 and the second connecting rod 42 can be connected by welding or as an integral structure; the connector 43 is connected to the transition plate 44 (specifically, the connector 43 is connected to the hole on the transition plate 44). Of course, in other embodiments, the connector 43 can also be connected to the hinge portion of the first connecting rod 41 and the second connecting rod 42 in other ways, for example, the connector 43 can be directly connected to the pin 45 at the hinge of the first connecting rod 41 and the second connecting rod 42.

[0044] like Figure 5 and Figure 6As shown, this embodiment of the invention also provides a support leg structure, including a movable support leg 6 and an automatic locking mechanism for the movable support leg as described above. The fixed support 1 of the automatic locking device 100 is fixedly installed on the movable support leg 6 or the frame 5. The movable support leg 6 is provided with a telescopic foot 7, which can extend and retract relative to the movable support leg 6. The telescopic foot 7 is connected to the follower component 4 of the automatic locking device 100 via a pull rope 8, which can specifically be a steel wire rope. When the telescopic foot 7 extends downward, it applies a pulling force to the follower component 4 via the pull rope 8. Under the pulling force of the pull rope 8, the follower component 4 drives the pin 2 to move in the locking direction S1, thereby locking the movable support leg 6 and the frame 5.

[0045] Furthermore, such as Figure 5 and Figure 6 As shown, in this embodiment, the automatic locking device 100 for the movable outrigger 6 is disposed inside the movable outrigger 6, and the fixed support 1 of the automatic locking device 100 is fixedly installed on the movable outrigger 6. The movable outrigger 6 has a through hole 61, and a rope support frame 62 is disposed inside the movable outrigger 6 near the through hole 61. The rope support frame 62 is fixed to the movable outrigger 6. One end of the pull rope 8 is connected to the follower component 4 of the automatic locking device 100, and the other end of the pull rope 8 passes around the rope support frame 62 and exits through the through hole 61 to the outside of the movable outrigger 6, connecting with the telescopic outrigger 7. Specifically, in this embodiment, the telescopic outrigger 7 is disposed at the end of the movable outrigger 6 away from the frame 5, and the through hole 61 is disposed on the movable outrigger 6 near the telescopic outrigger 7. The rope support frame 62 is used to steer the pull rope 8, reducing the contact between the pull rope 8 and the inner wall of the through hole 61 when the pull rope 8 passes through it, thereby reducing wear on the pull rope 8 during movement. The rope support frame 62 may specifically include a pulley, through which the pull rope 8 passes, and the pulley rotates as the pull rope 8 moves. Of course, in other embodiments, the rope support frame 62 may also have other structural forms. In other embodiments, the automatic locking device 100 for the movable outriggers may also be mounted on the frame 5; for example, the automatic locking device 100 for the movable outriggers may also be mounted on the outer wall of the frame 5.

[0046] Furthermore, such as Figure 5 and Figure 6As shown, in this embodiment, the telescopic outrigger 7 includes a telescopic cylinder 71 and an outrigger plate 72. The telescopic cylinder 71 is connected to the movable outrigger 6, and the outrigger plate 72 is connected to the telescopic cylinder 71. The telescopic cylinder 71 is used to drive the outrigger plate 72 to move up and down. In this embodiment, the pull rope 8 is connected to the telescopic cylinder 71; when the telescopic cylinder 71 extends downward, it can drive the pull rope 8 to move, thereby applying a pulling force to the follower component 4 through the pull rope 8; when the telescopic cylinder 71 retracts upward, the pull rope 8 becomes slack, thereby removing the pulling force applied to the follower component 4. In this embodiment, the telescopic cylinder 71 is provided with a fixing plate 73, and the pull rope 8 is connected to the fixing plate 73 through a buckle 74, thereby realizing the connection between the pull rope 8 and the telescopic cylinder 71; wherein, the structure of the buckle 74 is similar to the structure of the connecting member 43 mentioned above. In this embodiment, since the foot plate 72 and the telescopic cylinder 71 are movably connected (the foot plate 72 can rotate and / or swing relative to the telescopic cylinder 71), the pull rope 8 is not connected to the foot plate 72 (if the pull rope 8 is connected to the foot plate 72, it will affect the normal operation of the foot plate 72, and the foot plate 72 cannot provide a stable pulling force for the pull rope 8); in other embodiments, when the foot plate 72 and the telescopic cylinder 71 are fixedly connected, the pull rope 8 can also be connected to the foot plate 72.

[0047] This invention also provides an automatic locking method for a movable outrigger based on the automatic locking mechanism for the movable outrigger described above, the method comprising: like Figure 5 As shown, the telescopic outrigger 7 extends downwards, and the telescopic outrigger 7 applies a pulling force to the follower component 4 through the pull rope 8. Under the pulling force of the pull rope 8, the follower component 4 drives the pin 2 to move in the locking direction S1, so that the pin 2 locks the movable outrigger 6 and the frame 5. like Figure 6 As shown, the telescopic outrigger 7 retracts upward, and the telescopic outrigger 7 removes the tension applied to the pull rope 8, that is, the telescopic outrigger 7 removes the tension applied to the follower component 4. Under the elastic force of the elastic element 3, the pin 2 moves in the unlocking direction S2, so that the pin 2 releases the lock on the movable outrigger 6 and the frame 5.

[0048] This invention also provides an engineering device, including the outrigger structure described above. This engineering device can be a crane (e.g., a truck-mounted crane), a concrete pump truck, etc.

[0049] Furthermore, the engineering equipment also includes a frame 5, with movable outriggers 6 mounted on the frame 5, and the movable outriggers 6 are capable of horizontal telescopic movement relative to the frame 5.

[0050] Furthermore, in this embodiment, the frame 5 includes a fixed support leg (not labeled in the figure), the fixed support leg is part of the frame 5, the movable support leg 6 is connected to the fixed support leg, and the movable support leg 6 can move horizontally and telescopically relative to the fixed support leg; the movable support leg automatic locking mechanism can lock and unlock the movable support leg 6 and the fixed support leg.

[0051] The working principle of the automatic locking mechanism for the movable outriggers in this embodiment is as follows: like Figure 3 and Figure 5 As shown, during operation, the movable outrigger 6 extends horizontally relative to the frame 5. After the movable outrigger 6 extends to its position, the telescopic cylinder 71 in the telescopic foot 7 drives the foot plate 72 to extend downward, so that the foot plate 72 is supported on the ground. During the downward extension of the telescopic foot 7, the telescopic foot 7 applies a pulling force to the follower component 4 through the pull rope 8, thereby driving the pin 2 to move in the locking direction S1, so that the pin 2 is simultaneously inserted into the first locking hole 60 on the movable outrigger 6 and the second locking hole 50 on the frame 5, thereby automatically locking the movable outrigger 6 and the frame 5. At the same time, the elastic element 3 is compressed and stored.

[0052] like Figure 4 and Figure 6 As shown, after the operation is completed, the telescopic cylinder 71 in the telescopic outrigger 7 drives the outrigger plate 72 to retract upward, so that the outrigger plate 72 leaves the ground; during the process of the telescopic outrigger 7 retracting upward, the telescopic outrigger 7 gradually removes the tension applied to the pull rope 8, the pull rope 8 becomes slack, thereby removing the tension applied to the follower component 4, and the pin 2 moves in the unlocking direction S2 under the elastic force of the elastic element 3, so that the pin 2 is pulled out from the first locking hole 60 and the second locking hole 50, thereby automatically releasing the lock on the movable outrigger 6 and the frame 5.

[0053] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An automatic locking mechanism for a movable outrigger, characterized in that, The system includes an automatic locking device (100) for movable outriggers. The automatic locking device (100) for movable outriggers includes a fixed support (1), a pin (2), an elastic element (3), and a follower assembly (4). The fixed support (1) is used to fix the movable outrigger (6) or the frame (5). The pin (2) is slidably connected to the fixed support (1). The pin (2) has opposite locking directions (S1) and unlocking directions (S2). The pin (2) can move relative to the fixed support (1) along the locking direction (S1) and the unlocking direction (S2). The elastic element (3) is disposed between the pin (2) and the fixed support (1). The elastic element (3) is used to apply a spring force to the pin (2) toward the unlocking direction (S2). The follower assembly (4) is connected to at least the pin (2). The follower assembly (4) is used to connect to the telescopic outrigger (7) on the movable outrigger (6). When the telescopic support leg (7) extends, the telescopic support leg (7) drives the pin (2) to move in the locking direction (S1) through the follower component (4), so that the pin (2) locks the movable support leg (6) and the frame (5); when the telescopic support leg (7) retracts, the pin (2) moves in the unlocking direction (S2) under the elastic force of the elastic member (3), so that the pin (2) releases the lock on the movable support leg (6) and the frame (5).

2. The automatic locking mechanism for the movable outrigger as described in claim 1, characterized in that, The fixed support (1) includes a sleeve (11), at least part of the pin (2) is located inside the sleeve (11), and the pin (2) is slidable along the axial direction of the sleeve (11); one end of the pin (2) along the locking direction (S1) is a plug-in portion (21). When the pin (2) moves toward the locking direction (S1), the plug (21) can extend out of the sleeve (11) and lock the movable leg (6) and the frame (5); when the pin (2) moves toward the unlocking direction (S2), at least part of the plug (21) can retract into the sleeve (11) and release the locking of the movable leg (6) and the frame (5).

3. The automatic locking mechanism for the movable outrigger as described in claim 2, characterized in that, The elastic element (3) is a spring, and the elastic element (3) is located between the inner wall of the sleeve (11) and the outer wall of the pin (2); the outer wall of the pin (2) is provided with a first stop (22), and the inner wall of the sleeve (11) is provided with a second stop (111). The two ends of the elastic element (3) abut against the first stop (22) and the second stop (111) respectively; when the pin (2) moves toward the locking direction (S1), the elastic element (3) can compress and store force.

4. The automatic locking mechanism for the movable outrigger as described in claim 2, characterized in that, The sleeve (11) has a first opening (11A) at one end along the locking direction (S1), the first opening (11A) is used for the insertion part (21) to extend out of the sleeve (11); the fixed support (1) also includes a support base (12), the support base (12) is fixedly connected to the end of the sleeve (11) near the first opening (11A), and the support base (12) is used to be fixedly installed on the movable support leg (6) or the frame (5).

5. The automatic locking mechanism for the movable outrigger as described in claim 2, characterized in that, The follower assembly (4) includes a first link (41), a second link (42), and a connector (43). The first end of the first link (41) is hinged to the end of the pin (2) away from the insertion part (21). The first end of the second link (42) is hinged to the end of the sleeve (11) along the locking direction (S1). The second end of the first link (41) is hinged to the second end of the second link (42). The connector (43) is connected to the hinged parts of the first link (41) and the second link (42). The connector (43) is used to connect to the telescopic support leg (7).

6. The automatic locking mechanism for the movable outrigger as described in claim 5, characterized in that, The pin (2) is provided with a first connecting seat (23) on the outer side wall of the end away from the insertion part (21), and the sleeve (11) is provided with a second connecting seat (112) on the outer side wall of one end along the locking direction (S1). The first end of the first connecting rod (41) is hinged to the first connecting seat (23), and the first end of the second connecting rod (42) is hinged to the second connecting seat (112). The sleeve (11) has a clearance hole (113) on its side wall. The clearance hole (113) is an elongated structure extending along the axial direction of the sleeve (11) and the clearance hole (113) penetrates the end face of the sleeve (11) along the unlocking direction (S2). The first connecting seat (23) extends out of the sleeve (11) through the clearance hole (113). When the pin (2) slides along the axial direction of the sleeve (11), the first connecting seat (23) can move inside the clearance hole (113).

7. The automatic locking mechanism for the movable outrigger as described in any one of claims 1-6, characterized in that, The automatic locking mechanism of the movable outrigger also includes a pull rope (8), and the follower component (4) is connected to the telescopic outrigger (7) through the pull rope (8).

8. A method for automatically locking a movable outrigger based on the automatic locking mechanism of the movable outrigger as described in claim 7, characterized in that, The automatic locking method for the movable outrigger includes: The telescopic outrigger (7) extends, and the telescopic outrigger (7) applies a pulling force to the follower component (4) through the pull rope (8). Under the pulling force of the pull rope (8), the follower component (4) drives the pin (2) to move in the locking direction (S1), so that the pin (2) locks the movable outrigger (6) and the frame (5). The telescopic support leg (7) retracts, the telescopic support leg (7) removes the pulling force applied to the follower component (4), and the pin (2) moves in the unlocking direction (S2) under the elastic force of the elastic member (3), so that the pin (2) releases the lock on the movable support leg (6) and the frame (5).

9. A leg structure, characterized in that, The device includes a movable support leg (6) and an automatic locking mechanism for the movable support leg as described in claim 7. The movable support leg (6) is provided with a telescopic support foot (7). The automatic locking device (100) for the movable support leg is disposed inside the movable support leg (6). The fixed support (1) is fixedly installed on the movable support leg (6). The movable support leg (6) is provided with a through hole (61). A rope support frame (62) is provided inside the movable support leg (6) near the through hole (61). One end of the pull rope (8) is connected to the follower component (4). The other end of the pull rope (8) passes around the rope support frame (62) and passes through the through hole (61) to the outside of the movable support leg (6) and is connected to the telescopic support foot (7).

10. An engineering device, characterized in that, Includes the leg structure as described in claim 9.

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