Method and device for detecting in-place retraction state of X-shaped supporting leg and crane

Abstract

The invention belongs to the field of engineering machinery, and particularly relates to a method and device for detecting the in-place retraction state of an X-shaped supporting leg and a crane. The X-shaped supporting leg comprises four sets of horizontal supporting legs which extend in the width direction of a vehicle to form an X shape, and the ends, away from the vehicle, of the horizontal supporting legs are connected with vertical supporting legs when the horizontal supporting legs extend; and ball socket devices matched and locked with oil cylinder balls of the vertical supporting legs are arranged below the vertical supporting legs on the two groups of horizontal supporting legs on the front side. The device can ensure that in the driving process of the large-tonnage crane, the horizontal supporting leg of the large-tonnage crane is prevented from losing control due to unforeseen circumstances such as oil leakage or failure of the swing oil cylinder and further swinging at will so as not to threaten the driving safety of a vehicle, and can also prevent the horizontal supporting leg from accidentally stretching out due to misoperation when the supporting leg is in a retracting state so as not to affect the driving safety of the vehicle. And the driving cab in front of the frame is collided, so that the driving cab is damaged.

Description

Technical Field

[0001] The invention belongs to the field of engineering machinery, and in particular relates to a method and a device for detecting a state of an X-shaped outrigger being retracted into position, and a crane. Background Art

[0002] In the field of construction machinery, a wheeled crane is a device for lifting heavy objects. In order to improve the chassis stability and safety of the crane during operation, the chassis is usually equipped with an outrigger device, which includes a swing cylinder, horizontal outriggers, and vertical outriggers. X-type outriggers are a form of support for the crane's movable outriggers, which are used to maintain the stability of the crane. Figure 1 , Figure 2 As shown, it mainly includes a cab, horizontal outriggers, a swing cylinder and a frame.

[0003] During operation, the four horizontal legs are pushed by the swing cylinder to spread out in an "X" shape around the hinge point to the outside of the frame to ensure that the crane has enough span to maintain the stability of the operation; after the operation is completed, the horizontal legs are retracted to the initial state on both sides of the frame with the assistance of the swing cylinder. On the one hand, in order to meet the requirements of road driving, the widest part of the retracted legs cannot exceed the width of the frame, and it is also necessary to ensure that the horizontal legs cannot swing out of control at will during the driving process of the crane due to sudden situations such as oil leakage or failure of the swing cylinder, which will affect the driving safety of the vehicle; on the other hand, if someone mistakenly operates the horizontal legs when the legs are retracted, the horizontal legs will be extended, which may easily damage the cab in front of the frame.

[0004] Patent No. 201220019058.7 "Crane and its outrigger retraction detection device" (CN202429931U) introduces a crane and its outrigger retraction detection device, such as Figure 3 The detection device can ensure that the outriggers are fully retracted to prevent the operator from forgetting to retract the other outriggers before the fifth outrigger is fully retracted, thereby preventing the fifth outrigger from being damaged. It can further prevent the operator from driving when the fifth outrigger is not fully retracted to avoid safety accidents, thereby improving the safety of crane operation and having the advantage of a simple structure. However, it only introduces the detection of the fifth outrigger being retracted to its full position, and does not involve the detection of the extension of other outriggers. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a method and device for detecting the retracted position of an X-shaped outrigger, and a crane, to ensure that during the driving process of a large-tonnage crane, the horizontal outriggers will not lose control due to unexpected situations such as oil leakage or failure of the swing cylinder, and then swing randomly, thereby threatening the driving safety of the vehicle. It can also prevent the horizontal outriggers from accidentally extending out due to misoperation when the outriggers are in the retracted position, thereby colliding with the cab in front of the frame, causing damage to the cab.

[0006] The technical solution provided by the present invention is as follows:.

[0007] The present invention provides a method for detecting the retracted state of an X-shaped outrigger, wherein the X-shaped outrigger comprises four groups of horizontal outriggers extending in an X-shape along the width direction of a vehicle, wherein one end of the horizontal outriggers away from the vehicle when extended is connected to a vertical outrigger, and a ball socket device matched and locked with a ball head of an oil cylinder of the vertical outrigger is provided below the vertical outriggers on the two front groups of horizontal outriggers; The detection method comprises: Obtaining position information of the two sets of horizontal legs at the front side, and determining whether the two sets of horizontal legs at the front side are in a fully swung back state; When the two groups of horizontal outriggers on the front side are in the fully swung back state, and the ball heads of the vertical outrigger cylinders are correctly locked in the ball and socket devices, confirm that the X-type outriggers are in the safe swung back state; If the two sets of front horizontal outriggers are not in the fully retracted state or the ball heads of the vertical outrigger cylinders are not properly locked in the ball and socket devices, an alarm will sound and the vehicle will be prohibited from starting or moving until all outriggers are properly swung back and locked.

[0008] Furthermore, the position information of the horizontal legs is obtained by a first detection switch disposed on a fixing frame welded below the hinge between the two front sets of horizontal legs and the vehicle; the detection switch is used to obtain the position of the detection block.

[0009] Furthermore, when the first detection switch detects that the two front groups of horizontal legs are in a fully swung back state, the extension of the front horizontal legs is restricted.

[0010] Furthermore, the first detection switch is used to obtain the position of the detection block; the detection block is located at the arc-shaped edge of the tail of the two front groups of horizontal legs, and the detection block corresponds to the two front groups of horizontal legs fully swinging back to the position.

[0011] Furthermore, the detection block includes a first fully shrinkable detection block and a second fully shrinkable detection block and are symmetrically arranged on both sides of the arc edge.

[0012] Furthermore, a second detection switch is provided at the ball and socket device, and the second detection switch is used to cooperate with the detection block on the ball head of the vertical leg. When the two groups of horizontal legs located on the front side are in a fully swung back state, the vertical legs are controlled to be extended. When the ball head of the vertical leg is in the ball and socket device, the second detection switch is closed and a signal to stop extending the vertical legs is sent to the controller to stop the vertical leg extension action.

[0013] Furthermore, a signal from the detection switch is obtained, and whether the detection switch is operating normally is determined based on the signal from the detection switch. If the detection switch fails, an alarm is issued.

[0014] The present invention also provides an X-type leg retracted position detection device, wherein the X-type leg comprises four groups of horizontal legs extending in an X-shape along the width direction of the vehicle, wherein one end of the horizontal legs away from the vehicle when extended is connected to a vertical leg, and a ball socket device matching and locking with a ball head of a vertical leg oil cylinder is provided below the vertical legs on the two front groups of horizontal legs; The detection device comprises: A position detection module is used to obtain the position information of the two sets of horizontal legs on the front side and determine whether the two sets of horizontal legs on the front side are in a fully swung back state; The locking state detection module is used to detect whether the ball heads of the vertical leg cylinders are correctly locked in the ball and socket devices when the two sets of horizontal legs at the front side are in the fully swung back state; The control module is used to confirm that the X-shaped legs are in a safe swing-back state when the detection results of the position detection module and the locking state detection module show that the two front horizontal legs are in a fully swing-back state and the ball heads of the vertical leg cylinders are correctly locked in the ball and socket devices; if the two front horizontal legs are not in a fully retracted state or the ball heads of the vertical leg cylinders are not correctly locked in the ball and socket devices, an alarm is issued through the alarm module, and the vehicle control system is used to prohibit the vehicle from starting or moving until all the legs are correctly swung back and locked.

[0015] Furthermore, the device also includes a leg panel, which is used to issue horizontal leg and vertical leg extension and retraction instructions.

[0016] The present invention also provides a crane, comprising the above-mentioned X-shaped outrigger retracted position state detection device.

[0017] Beneficial Effects

[0018] 1. The present invention uses a detection switch to place the vertical support leg in the detection ball and socket device, thereby preventing the support leg from swinging out of control due to sudden situations such as oil leakage or failure of the swing cylinder, thereby affecting vehicle driving and personal safety. The driving safety of the vehicle is improved.

[0019] 2. The present invention limits the extension of the horizontal outriggers by detecting the switch when the outriggers are retracted, thereby preventing someone from misoperating the horizontal outriggers and extending the horizontal outriggers to hit the cab in front of the frame, thereby damaging the cab. This reduces the damage to the cab and reduces the maintenance cost of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the prior art X-leg retracted state (1, cab; 2, horizontal leg; 3, swing cylinder; 4-frame);

[0021] Figure 2This is a schematic diagram of the prior art X-leg unfolding state (1, cab; 2, horizontal leg; 3, swing cylinder; 4-frame);

[0022] Figure 3 It is a schematic diagram of the fifth leg of the prior art being retracted to the detection position;

[0023] Figure 4 is a schematic diagram of the X-leg device of the present invention;

[0024] Figure 5 is a schematic diagram of a ball and socket device of the present invention;

[0025] Figure 6 It is a schematic diagram of the position of the swing back detection switch of the present invention;

[0026] Figure 7 It is a flow chart of the X-type outrigger safety control method of the present invention.

[0027] Explanation of the reference numerals: 1. cab; 2. horizontal support leg; 21. fixed bracket; 22. first detection switch; 3. swing cylinder; 4. vertical support leg; 41. ball and socket device; 42. second detection switch; 5. frame. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0031] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the invented product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0032] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0033] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Example 1

[0035] An embodiment of the present invention provides a method for detecting the retracted state of an X-shaped outrigger, wherein the X-shaped outrigger comprises four groups of horizontal outriggers 2 extending in an X-shape along the width direction of a vehicle, wherein one end of the horizontal outriggers 2 away from the vehicle when extended is connected to a vertical outrigger 4, and a ball socket device 41 matching and locking with a ball head of an oil cylinder of the vertical outrigger 4 is provided below the vertical outriggers 4 on the two front groups of horizontal outriggers 2; The detection method comprises: Obtaining position information of the two groups of horizontal legs 2 at the front side, and determining whether the two groups of horizontal legs 2 at the front side are in a fully swung back state; When the two groups of horizontal legs 2 on the front side are in a fully swung back state, and the cylinder ball heads of the vertical legs 4 are correctly locked in the ball and socket device 41, it is confirmed that the X-shaped legs are in a safe swung back state; If the two front horizontal legs 2 are not in a fully retracted state or the cylinder ball heads of the vertical legs 4 are not properly locked in the ball and socket device 41, an alarm is sounded and the vehicle is prohibited from starting or moving until all legs are properly swung back and locked.

[0036] In this embodiment, the position information of the horizontal legs is obtained through a first detection switch 22 disposed on a fixing frame welded below the hinge between the two front sets of horizontal legs 2 and the vehicle.

[0037] In this embodiment, when the first detection switch 22 detects that the two front groups of horizontal legs 2 are in the fully swung back state, the extension of the front horizontal legs 2 is restricted.

[0038] In this embodiment, the first detection switch 22 is used to obtain the position of the detection block; the detection block is located at the arc-shaped edge at the tail of the two front groups of horizontal legs 2, and the detection block corresponds to the two front groups of horizontal legs 2 fully swinging back to the position.

[0039] In this embodiment, the detection blocks include a first fully shrinkable detection block and a second fully shrinkable detection block and are symmetrically arranged on both sides of the arc edge.

[0040] In this embodiment, a second detection switch 42 is provided at the ball socket device 41, and the second detection switch 42 is used to cooperate with the detection block on the ball head of the vertical leg 4. When the two groups of horizontal legs 2 located on the front side are in a fully swung back state, the vertical leg 4 is controlled to extend. When the ball head of the vertical leg 4 is in the ball socket device 41, the second detection switch 42 is closed and sends a signal to the controller to stop the extension of the vertical leg 4 to stop the extension of the vertical leg 4.

[0041] In this embodiment, a signal from the detection switch is obtained, and whether the detection switch operates normally is determined based on the signal from the detection switch. If the detection switch fails, an alarm is issued.

[0042] Example 2

[0043] The present invention provides an embodiment to provide an X-shaped leg retracted state detection device, which mainly includes an X-shaped leg device, a detection switch (proximity switch), a ball and socket device 41, a controller, and a display. The specific implementation scheme is as follows:

[0044] a. Leg device such as Figure 4 It mainly includes a cab 1, four sets of horizontal outriggers 2, a swing cylinder 3, a vertical outrigger 4, and a frame 5.

[0045] b. Ball and socket device Figure 5 As shown: the detection switch 42 is installed at the ball socket device 41. When the legs are in the retracted state, the oil cylinder ball head of the vertical leg 4 is extended to the ball socket device 41, the purpose is to limit the vertical leg 4 from swinging outward when in the retracted state. When the second detection switch 42 located at the ball socket device 41 detects the oil cylinder ball head of the vertical leg 4, the second detection switch 42 is closed, and the signal of the second detection switch 42 is transmitted to the controller, and the controller outputs a command to stop the extension of the vertical leg 4, so as to avoid excessive extension and retraction of the vertical leg 4 and damage to the ball socket device 41.

[0046] c. Horizontal leg swing back detection device Figure 6 As shown: the first detection switch 22 is fixed to the fixed bracket 21 welded at the hinge of the two front horizontal legs 2 and the frame 5. When the two front horizontal legs 2 are in a fully swung back state, the first detection switch 22 detects the swung back horizontal legs 2, and the second detection switch 22 lights up and transmits an electrical signal to the controller. The controller receives the signal from the second detection switch 22 and issues a limit to the horizontal extension of the horizontal legs. When the vehicle is in the retracted state, it is prevented from extending the horizontal legs 2 by mistake, thereby damaging the cab 1 in front of the frame 5.

[0047] dX-type outrigger safety control method flow chart and X-type outrigger safety control system diagram, such as Figure 7 As shown, the system includes an outrigger panel, a controller, an outrigger detection switch, and a display. The specific detection implementation is as follows:

[0048] a) The outrigger panel is responsible for operating the swing cylinder 3, the horizontal outrigger 2 and the vertical outrigger 4 to issue extension and retraction instructions. After the controller receives the extension and retraction instructions of the corresponding outriggers sent by the outrigger panel, the swing cylinder 3, the horizontal outrigger device and the vertical outrigger device execute the action instructions sent by the controller.

[0049] b) When the two groups of horizontal legs 2 on the front side are in a fully retracted state, when the controller receives a signal from the first detection switch 22 at the tail of the horizontal legs 2, the controller sends an action to stop the horizontal legs 2 from extending horizontally; When the horizontal leg 2 is in the retracted state, the controller receives a signal from the second detection switch 42 at the ball and socket device 41, and the controller initiates an action to stop the vertical leg 4 from extending;

[0050] c) The display is set with an interface for the detection switch status of the horizontal leg 2 and the vertical leg 4. When the detection switch at a leg fails or fails, the display interface can accurately display the status of the detection switch. It can also display the fault information of the detection switch and accurately locate the position of the detection switch to facilitate fault troubleshooting.

[0051] The main interface of the outrigger operation displays the status of the outrigger detection switch in real time, allowing the operator to intuitively check whether the outrigger is fully extended or retracted.

[0052] Example 3

[0053] The embodiment of the present invention further provides an X-shaped leg retracted position detection device, wherein the X-shaped leg comprises four groups of horizontal legs 2 extending in an X-shape along the width direction of the vehicle, wherein one end of the horizontal legs 2 away from the vehicle when extended is connected to a vertical leg 4, and a ball socket device 41 matching and locking with the ball head of the oil cylinder of the vertical leg 4 is provided below the vertical leg 4 on the two front groups of horizontal legs 2; The detection device comprises: A position detection module is used to obtain the position information of the two groups of horizontal legs 2 at the front side, and determine whether the two groups of horizontal legs 2 at the front side are in a fully swung back state; The locking state detection module is used to detect whether the ball heads of the cylinders of the vertical legs 4 are correctly locked in the ball and socket devices 41 when the two groups of horizontal legs 2 located at the front side are in a fully swung back state; The control module is used to confirm that the X-shaped legs are in a safe swing-back state when the detection results of the position detection module and the locking state detection module show that the two front horizontal legs 2 are in a fully swing-back state and the ball heads of the vertical legs 4 cylinders are correctly locked in the ball-socket device 41; if any detection result in the position detection module or the locking state detection module shows an abnormality, that is, the two front horizontal legs 2 are not in a fully retracted state or the ball heads of the vertical legs 4 cylinders are not correctly locked in the ball-socket device 41, an alarm is issued through the alarm module, and the vehicle is prohibited from starting or moving through the vehicle control system until all the legs are correctly swung back and locked.

[0054] In this embodiment, the device further comprises a leg panel, and the leg panel is used to issue extension and retraction instructions for the horizontal legs 2 and the vertical legs 4.

[0055] Example 4

[0056] A crane comprises the X-type outrigger retracted position detection device described in Example 3.

[0057] Definitions of Abbreviations and Key Terms

[0058] X-type outriggers: A type of support with movable outriggers that can swing freely around the hinge point. In the working state, the four outriggers are spread out in an "X" shape.

[0059] Detection switch (proximity switch): A position switch that does not require direct mechanical contact with moving parts. When an object approaches the switch sensing surface to the action distance, the switch can be turned on or off. A contactless proximity switch.

[0060] Controller: It is composed of microprocessor, memory, input / output interface (I / O), analog-to-digital converter (A / D), and large-scale integrated circuits such as shaping and driving. It is a safe and intelligent controller that converts input signals into output signals through calculation.

[0061] Display: A display tool that displays certain electronic signals on a screen through a specific transmission device. A display device used to display and store the working status of a vehicle.

[0062] Outrigger panel: An electrical device used to control the extension and retraction of outriggers.

Claims

1. A method for detecting the retracted state of an X-shaped outrigger, characterized in that: The X-shaped legs include four groups of horizontal legs extending in an X-shape along the width direction of the vehicle, one end of the horizontal legs away from the vehicle when extended is connected to a vertical leg, and a ball and socket device matching and locking with the ball head of the vertical leg cylinder is provided below the vertical legs on the two front groups of horizontal legs; The detection method comprises: Obtaining position information of the two sets of horizontal legs at the front side, and determining whether the two sets of horizontal legs at the front side are in a fully swung back state; When the two groups of horizontal outriggers on the front side are in the fully swung back state, and the ball heads of the vertical outrigger cylinders are correctly locked in the ball and socket devices, confirm that the X-type outriggers are in the safe swung back state; If the two sets of front horizontal outriggers are not in the fully retracted state or the ball heads of the vertical outrigger cylinders are not properly locked in the ball and socket devices, an alarm will sound and the vehicle will be prohibited from starting or moving until all outriggers are properly swung back and locked.

2. The method for detecting the retracted state of an X-shaped outrigger according to claim 1, characterized in that: The position information of the horizontal legs is obtained through a first detection switch arranged on a fixing frame welded below the hinged joints of the two front sets of horizontal legs and the vehicle.

3. The method for detecting the retracted state of the X-shaped legs according to claim 2, characterized in that: When the first detection switch detects that the two groups of front horizontal legs are in the fully swung back state, the extension movement of the front horizontal legs is restricted.

4. The method for detecting the retracted state of the X-shaped legs according to claim 2, characterized in that: The first detection switch is used to obtain the position of the detection block; the detection block is located at the arc-shaped edge of the tail of the two front groups of horizontal legs, and the detection block corresponds to the two front groups of horizontal legs fully swinging back to the position.

5. The method for detecting the retracted state of the X-shaped legs according to claim 4, characterized in that: The detection blocks include a first fully-contracted detection block and a second fully-contracted detection block and are symmetrically arranged on both sides of the arc edge.

6. The method for detecting the retracted state of an X-shaped outrigger according to claim 1, characterized in that: A second detection switch is provided at the ball and socket device, and the second detection switch is used to cooperate with the detection block on the ball head of the vertical leg. When the two groups of horizontal legs located on the front side are in a fully swung back state, the vertical legs are controlled to be extended. When the ball head of the vertical leg is in the ball and socket device, the second detection switch is closed and a signal to stop extending the vertical legs is sent to the controller to stop the vertical leg extension action.

7. The method for detecting the retracted state of an X-shaped outrigger according to claim 2 or 6, characterized in that: Get the signal of the detection switch, and judge whether the detection switch is operating normally according to the signal of the detection switch. If the detection switch fails, an alarm prompt will be issued.

8. An X-shaped leg retracted position detection device, characterized in that: The X-shaped legs include four groups of horizontal legs extending in an X-shape along the width direction of the vehicle, one end of the horizontal legs away from the vehicle when extended is connected to a vertical leg, and a ball and socket device matching and locking with the ball head of the vertical leg cylinder is provided below the vertical legs on the two front groups of horizontal legs; The detection device comprises: A position detection module is used to obtain the position information of the two sets of horizontal legs on the front side and determine whether the two sets of horizontal legs on the front side are in a fully swung back state; The locking state detection module is used to detect whether the ball heads of the vertical leg cylinders are correctly locked in the ball and socket devices when the two sets of horizontal legs at the front side are in the fully swung back state; The control module is used to confirm that the X-shaped legs are in a safe swing-back state when the detection results of the position detection module and the locking state detection module show that the two front horizontal legs are in a fully swing-back state and the ball heads of the vertical leg cylinders are correctly locked in the ball and socket devices; if the two front horizontal legs are not in a fully retracted state or the ball heads of the vertical leg cylinders are not correctly locked in the ball and socket devices, an alarm is issued through the alarm module, and the vehicle control system is used to prohibit the vehicle from starting or moving until all the legs are correctly swung back and locked.

9. The X-shaped leg retracted position detection device according to claim 8, further comprising a leg panel, wherein the leg panel is used to issue horizontal leg and vertical leg extension and retraction instructions.

10. A crane, characterized in that: It includes the X-shaped leg retracted position detection device as described in claim 8.

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