Mobile crane two-way operating system and mobile crane

Abstract

The utility model relates to the technical field of hoist, disclose a kind of truck crane bidirectional operation system and truck crane. Truck crane bidirectional operation system includes first operation subassembly, and first operation subassembly includes first operating lever, and first operating lever is connected with the main valve of truck crane;Second operation subassembly, and second operation subassembly includes second operating lever and connecting piece, and second operating lever is located in the side opposite to first operating lever, and one end of connecting piece is connected with second operating lever, and the other end of connecting piece is connected with main valve. The utility model is by being set in first side first operating lever and driving main valve movement to realize the operation of first side, by being set in second side second operating lever, and by connecting piece, second operating lever is connected with main valve, realize the operation in second side, to form the bidirectional operation of truck crane, avoid the vision of operator when unilateral operation to be blocked, to accurately control the movement state of crane.

Description

Technical Field

[0001] This utility model relates to the field of crane technology, specifically to a two-way operating system for truck-mounted cranes and a truck-mounted crane. Background Technology

[0002] A truck-mounted crane is a device that uses a hydraulic lifting and telescopic system to lift, rotate, and transport goods, and is typically mounted on a truck. With the rapid rise of the logistics and transportation industry and the continuous increase in labor costs, truck-mounted cranes, which integrate lifting and transportation, have emerged as a new industry within the category of engineering lifting machinery. They are of great significance in reducing labor intensity, saving manpower, lowering logistics costs, and accelerating construction speed.

[0003] A truck-mounted crane typically consists of a truck chassis (including the cab), a cargo box, and a crane. The crane's extension, retraction, and rotation are usually controlled manually via a control lever on the main valve.

[0004] However, the operator's field of vision will be obstructed, making it difficult to accurately control the crane's movement. Utility Model Content

[0005] This utility model provides a two-way operating system for a truck-mounted crane and a truck-mounted crane to solve the problem that the operator's field of vision is obstructed, making it difficult to accurately control the crane's movement.

[0006] In a first aspect, this utility model provides a two-way operating system for a truck-mounted crane, a first operating component, the first operating component including a first operating lever, the first operating lever being connected to the main valve of the truck-mounted crane; The second operating component includes a second operating lever and a connector. The second operating lever is located on the side opposite to the first operating lever. One end of the connector is connected to the second operating lever, and the other end of the connector is connected to the main valve. Displacement sensors, controllers, and control valves; The displacement sensor is installed inside the main valve and is used to detect the valve core displacement of the main valve. Both the displacement sensor and the control valve are electrically connected to the controller. The control valve is used to adjust the throttle opening and closing degree of the truck-mounted crane according to the valve core displacement.

[0007] Beneficial effects: Since the first operating lever is connected to the main valve of the truck-mounted crane, the movement of the first operating lever can drive the valve core of the main valve to move and complete the reversal. The reversal of the valve core can drive the actuator of the truck-mounted crane to perform telescopic, rotary and other actions. The operation of the truck-mounted crane can be realized on this side of the first operating lever.

[0008] Since one end of the connector is connected to the second operating lever, pulling the second operating lever in a third direction can cause the connector to move with the second operating lever. Since the other end of the connector is connected to the main valve, the movement of the connector can cause the valve core of the main valve to be displaced and complete the reversal. The reversal of the valve core can drive the actuator of the truck crane to perform telescopic, rotary and other actions. The operation of the truck crane can be realized on this side of the second operating lever through the second operating lever and the connector.

[0009] The second operating lever is located on the opposite side of the first operating lever, meaning they are on opposite sides, thus enabling bidirectional operation of the truck-mounted crane. When the operator's view is obstructed on one side, they can switch to operating the crane from the other side, ensuring unobstructed vision and precise control of the crane's actuators. Furthermore, when the operator's view is unobstructed, they can choose the side closest to them to operate the crane, reducing unnecessary movement.

[0010] In addition, by setting up displacement sensors, controllers and control valves to realize the linkage between the movement of the main valve core and the movement of the throttle, the driver can drive the throttle to open and close when controlling the main valve on the second side, avoiding the difficulty for the driver to control the movement of the main valve and the movement of the throttle at the same time after adjusting the operating position.

[0011] In one alternative embodiment, the connector includes a pivot and a linkage mechanism; The second operating lever extends along a first direction, and the rotating shaft is connected to the second operating lever, with the axis of the rotating shaft extending along a second direction; One end of the linkage mechanism is connected to the rotating shaft, and the other end is connected to the main valve.

[0012] Beneficial effect: The second operating lever is connected to the rotating shaft. The second operating lever extends in the first direction, and the axis of the rotating shaft extends in the second direction, so that when the second operating lever is pulled in the third direction, the second operating lever drives the rotating shaft to rotate in the second direction.

[0013] One end of the linkage mechanism is connected to the rotating shaft, allowing the shaft to rotate and drive the linkage mechanism to move in a third direction. Since the other end of the linkage mechanism is connected to the main valve, it further displaces the valve core and reverses its direction. This reversal of the valve core drives the crane's actuator to perform extension, retraction, and rotation actions, which are then controlled via the second operating lever. The linkage mechanism creates a large lever arm, reducing the operating force required on the second operating lever side and making operation easier.

[0014] In one alternative embodiment, the linkage mechanism includes a first link, a second link, and a third link; The first end of the first link is connected to the rotating shaft, the first link extends in a third direction, and the second end of the first link is connected to the first end of the second link; The second link extends along the first direction, and the second end of the second link is connected to the first end of the third link, the second end of the third link being connected to the main valve.

[0015] Beneficial effect: The second operating lever is connected to the rotating shaft. The second operating lever extends in the first direction, and the axis of the rotating shaft extends in the second direction, so that when the second operating lever is pulled in the third direction, the second operating lever drives the rotating shaft to rotate in the second direction.

[0016] The first link is connected to a rotating shaft at its first end. The first link extends along a third direction, so that when the rotating shaft rotates, it drives the first link to move along that third direction. Since the second link, extending along a first direction, is connected to the first link, it can move along the third direction with the first link. Furthermore, since the two ends of the third link are connected to the second link and the main valve respectively, it further drives the third link and the main valve to move along the third direction.

[0017] The second operating lever is connected to the main valve through multiple linkages, without changing the internal spring and operating mechanism of the main valve core, thus ensuring that the operating force characteristics and control performance of the main valve are not affected.

[0018] In one optional embodiment, the rotating shaft includes a rotating part and a fixed part, the rotating part being rotatably connected relative to the fixed part; The second operating lever and the first connecting rod are both mounted on the rotating part, and the fixing part is used to mount the rotating shaft on the structural component of the truck-mounted crane.

[0019] Beneficial effects: By fixing the shaft, the shaft can be mounted on the structural components of the truck-mounted crane, which increases the structural strength of the shaft.

[0020] In one alternative embodiment, the connector includes a flexible shaft; The second operating lever includes an operating part and a connecting part; The operating part extends along a first direction, and the connecting part extends along a third direction; The operating part is connected to the bottom of the connecting part, the first end of the flexible shaft is rotatably connected to the top of the connecting part, and the second end of the flexible shaft is connected to the side of the main valve facing away from the first operating lever.

[0021] Beneficial effects: By connecting the bottom of the operating part and the connecting part, and rotatably connecting the first end of the flexible shaft to the top of the connecting part, the operating part, the connecting part, and the flexible shaft form a lever structure. When the operating part is pressed down along the third direction, the connecting part and the flexible shaft rotate relative to each other, tightening the flexible shaft. The second end of the flexible shaft is connected to the side of the main valve opposite to the first operating lever, so that when the flexible shaft is tightened, it can pull the valve core of the main valve to move and complete the reversing, thereby realizing the operation on the side of the second operating lever.

[0022] Flexible shaft drives are characterized by flexible arrangement and strong adaptability of transmission paths, which can reduce force loss during transmission and make operation easier.

[0023] In one alternative embodiment, the connector further includes a first bushing and a second bushing; The first bushing is fitted onto the portion of the flexible shaft near the first operating lever, and the second bushing is fitted onto the portion of the flexible shaft near the second operating lever.

[0024] Beneficial effects: By setting a first bushing and a second bushing on the outer periphery of the flexible shaft, wear on the flexible shaft can be reduced and the flexible shaft can be protected.

[0025] In one optional implementation, the second operating component further includes a first card plate and a second card plate; The first plate has a first mounting hole and a first mounting part, the first bushing passes through the first mounting hole, and the first mounting part is used to connect the structural components on the truck-mounted crane; The second plate has a second mounting hole and a second mounting part, the second bushing passes through the second mounting hole, and the second mounting part is used to connect the structural components on the truck-mounted crane.

[0026] Beneficial effect: By setting the first clamping plate, the first bushing can be connected to the structural components on the truck-mounted crane, thereby supporting and protecting the side of the flexible shaft near the first operating lever.

[0027] By setting a second clamping plate, the second bushing can be connected to the structural components on the truck-mounted crane, thereby providing support and protection for the side of the flexible shaft closest to the second operating lever.

[0028] In one alternative embodiment, the operating end of the first operating lever has a first handle portion; And / or, the operating end of the second operating lever has a second handle portion.

[0029] Beneficial effect: By setting a first handle at the operating end of the first operating lever, it is convenient for the operator to pull the first operating lever.

[0030] By providing a second handle at the operating end of the second operating lever, it is easier for the operator to pull the second operating lever.

[0031] Secondly, this utility model also provides a truck-mounted crane, including an actuator, a main valve, and a two-way operating system for the truck-mounted crane as described in any of the above items; The main valve is connected to the actuator; The first operating lever and connecting parts of the bidirectional operating system of the truck-mounted crane are both connected to the main valve.

[0032] Beneficial effects: Since the truck-mounted crane provided by this utility model includes the bidirectional operating system of the truck-mounted crane mentioned in any of the above-mentioned items, it has at least the beneficial effects mentioned in any of the above-mentioned items, which will not be elaborated here. Attached Figure Description

[0033] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of a two-way operating system for a truck-mounted crane according to an embodiment of the present invention, viewed from a first perspective. Figure 2 This is a schematic diagram of the structure of a two-way operating system for a truck-mounted crane according to an embodiment of the present invention, viewed from a second perspective. Figure 3 for Figure 2 Enlarged view of the structure within the dashed line section; Figure 4 This is a schematic diagram of the structure of another bidirectional operating system for a truck-mounted crane, near the first operating lever, according to an embodiment of the present invention. Figure 5 This is a schematic diagram of the structure of another bidirectional operating system for a truck-mounted crane, near the second operating lever, according to an embodiment of the present invention.

[0035] Explanation of reference numerals in the attached figures: 1. First operating component; 2. Second operating component; 3. Main valve; 10. First operating lever; 11. First handle section; 20. Second operating lever; 21. Operating part; 22. Connecting part; 23. Second handle part; 30. Connectors; 31. Rotating shaft; 311. Rotating part; 312. Fixed part; 32. Linkage mechanism; 321. First link; 322. Second link; 323. Third link; 33. Flexible shaft; 331. First connecting structure; 332. Second connecting structure; 34. Connecting shaft; 35. First bushing; 36. Second bushing; 37. First clamping plate; 371. First mounting hole; 38. Second card plate; 381. Second mounting hole. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0037] There is a technical problem in the relevant technology where the operator's field of vision is obstructed, making it difficult to accurately control the movement of the crane. The reason for this problem is that when the operator operates the control lever of the main valve on one side to control the crane of the truck-mounted crane to complete actions such as extension, retraction and rotation, the operator's field of vision is obstructed by the mechanical arm and other structures when operating the truck-mounted crane on one side, making it difficult to accurately control the movement of the crane.

[0038] To address the aforementioned technical problems, this utility model embodiment achieves operation on the first side by setting a first operating lever on the first side to drive the main valve to move, and achieves operation on the second side by setting a second operating lever on the second side and connecting the second operating lever to the main valve through a connector. This forms a bidirectional operation for the truck-mounted crane, avoiding obstruction of the operator's view when operating on one side, thereby enabling precise control of the crane's movement status.

[0039] The following is combined with Figures 1 to 5 The following describes embodiments of the present invention.

[0040] In this paper, the first direction, the second direction, and the third direction are perpendicular to each other. The first direction can be... Figures 1-5 The left and right directions in the middle, the second direction can be Figures 1-5 The forward and backward directions, and the third direction can be... Figures 1-5 The up and down directions in the middle.

[0041] According to an embodiment of this utility model, in one aspect, a two-way operating system for a truck-mounted crane is provided, with reference to... Figures 1-3The truck-mounted crane's bidirectional operating system includes a first operating component 1 and a second operating component 2. The first operating component 1 is used to operate the truck-mounted crane from a first side. The first operating component 1 includes a first operating lever 10, which is connected to the truck-mounted crane's main valve 3. The truck-mounted crane's main valve controls the crane's actuators, such as the hoist, to perform extension, retraction, and rotation actions. The first operating lever 10 can be connected to the control lever of the main valve 3. For example, pulling the first operating lever 10 causes the control lever of the main valve 3 to move. The control lever of the main valve 3 causes the valve core of the main valve 3 to shift and complete the reversal. The reversal of the valve core then drives the crane's actuators, such as the hoist, to perform extension, retraction, and rotation actions. The first operating lever 10 can be a strip-shaped lever or a column-shaped lever; this application does not limit its application in this regard.

[0042] refer to Figure 1 and Figure 3 The second operating component 2 is used to operate the truck-mounted crane from the other side. The second operating component 2 includes a second operating lever 20 and a connecting member 30. The second operating lever 20 can be a strip-shaped lever or a column-shaped lever; this application does not limit its application. The connecting member 30 is used to connect the second operating lever 20 to the main valve 3, so as to transmit the movement of the second operating lever 20 to the main valve 3. For example, pulling the second operating lever 20 transmits its movement to the control lever of the main valve 3 through the connecting member 30, causing the control lever of the main valve 3 to move. The control lever of the main valve 3 causes the valve core of the main valve 3 to displace and complete the reversal. The reversal of the valve core can drive the crane and other actuators of the truck-mounted crane to perform telescopic, slewing, and other actions.

[0043] The second operating lever 20 is located on the side opposite to the first operating lever 10. For example, if the first operating lever 10 is located on the left side of the truck-mounted crane, then the second operating lever 20 is located on the right side. Alternatively, if the first operating lever 10 is located on the front side of the truck-mounted crane, then the second operating lever 20 is located on the rear side. This enables bidirectional operation of the truck-mounted crane. When the operator's view is obstructed on one side, they can switch to operating the crane on the other side, avoiding obstruction of their view and allowing for precise control of the crane and other actuators. Furthermore, when the operator's view is unobstructed, they can choose to operate the crane from the side closest to them, reducing unnecessary movement.

[0044] The truck-mounted crane's two-way operating system also includes a displacement sensor, a controller, and a control valve. The displacement sensor detects displacement signals and converts them into electrical signals. The controller can be an electronic controller or an onboard computer, and can be located inside the cab or on the side beam of the chassis; this application does not limit its location. The control valve can be installed on the throttle inlet line and can be a throttle valve or a flow control valve.

[0045] A displacement sensor is installed inside the main valve 3, for example, by attaching it to the valve core of the main valve 3, to detect the displacement of the valve core of the main valve 3. Both the displacement sensor and the control valve are electrically connected to the controller; this electrical connection can be wired or wireless.

[0046] When the valve core of main valve 3 is displaced, the displacement detector detects the displacement and converts it into an electrical signal. The controller receives the electrical signal and outputs a drive signal that matches the displacement amount. The control valve receives the drive signal and adjusts the throttle opening / closing degree accordingly. This design allows the throttle opening / closing degree to be automatically matched according to the valve core displacement, improving the overall economic efficiency of the truck-mounted crane, reducing the frequency of manual throttle adjustments, and increasing the operating efficiency of the truck-mounted crane.

[0047] Furthermore, after adjusting the operating position, the driver faces the challenge of simultaneously controlling the movement of the main valve and the throttle. For example, with the throttle positioned near the first side of the main unit, the driver can easily control the throttle opening and closing by moving the valve core of the main valve 3 via the first operating lever 10. However, when the driver moves the valve core of the main valve 3 via the second operating lever 20 from the second side, the throttle becomes difficult to control due to its proximity to the first side. By incorporating a displacement sensor, controller, and control valve to link the movement of the main valve 3's valve core with the throttle movement, the driver can control the throttle opening and closing when operating the main valve 3 from the second side, thus avoiding the difficulty of simultaneously controlling the main valve and throttle movement after adjusting the operating position.

[0048] In one embodiment, reference Figures 1-3 The connecting member 30 includes a rotating shaft 31 and a linkage mechanism 32. The rotating shaft 31 may include a rotating part 311 and a fixed part 312. The rotating part 311 is rotatably connected to the fixed part 312. For example, the fixed part 312 is a shaft body, and the rotating part 311 is a bushing, with the bushing fitted onto the shaft body to achieve relative rotation. The shaft body is connected to a structural component of the truck-mounted crane, which may be the outrigger box or the base frame of the truck-mounted crane. The shaft body can be connected to the structural component of the truck-mounted crane via threaded connections or welding. The axis of the rotating shaft 31 extends along a second direction, and the axial direction of the rotating shaft 31 can be longitudinal, allowing the rotating shaft 31 to rotate about the second direction.

[0049] refer to Figure 2 and Figure 3 The second operating lever 20 extends along the first direction, that is, the second operating lever 20 can extend in the left and right directions. The rotating shaft 31 is connected to the second operating lever 20, and one end of the second operating lever 20 and one end of the linkage mechanism 32 can be installed on the rotating part 311 of the rotating shaft 31 by means of threaded connection, welding, snap-fit, etc.

[0050] The rotating shaft 31 is connected to the second operating lever 20. The second operating lever 20 extends along the first direction, and the axis of the rotating shaft 31 extends along the second direction, so that when the second operating lever 20 is pulled along the third direction, the second operating lever 20 drives the rotating shaft 31 to rotate along the second direction.

[0051] One end of the linkage mechanism 32 is connected to the rotating shaft 31, so that when the rotating shaft 31 rotates, it can drive the linkage mechanism 32 to move in a third direction. Since the other end of the linkage mechanism 32 is connected to the main valve, it further drives the valve core of the main valve 3 to displace and complete the reversal. The reversal of the valve core can drive the actuator of the truck-mounted crane to perform telescopic, rotary and other actions, thereby realizing the operation through the second operating lever 20. The linkage mechanism 32 can form a large lever arm, thereby reducing the operating force required when operating on the second operating lever 20 side, making the operation easier.

[0052] In one embodiment, reference Figures 1-3 The linkage mechanism 32 includes a first link 321, a second link 322, and a third link 323. The first link 321, the second link 322, and the third link 323 can all be strip-shaped or column-shaped, and this application does not limit them.

[0053] The first end of the first connecting rod 321 is connected to the rotating shaft 31. The first end of the first connecting rod 321 can be installed on the rotating part 311 of the rotating shaft 31 by means of threaded connection, welding, or snap-fit. The first connecting rod 321 extends in a third direction and can extend vertically. The second end of the first connecting rod 321 is rotatably connected to the first end of the second connecting rod 322. The second connecting rod 322 extends in a first direction and can extend horizontally. The second end of the second connecting rod 322 is rotatably connected to the first end of the third connecting rod 323, and the second end of the third connecting rod 323 is installed on the main valve 3.

[0054] Since the rotating shaft 31 is connected to the second operating lever 20, the second operating lever 20 extends along the first direction, and the axis of the rotating shaft 31 extends along the second direction, so that when the second operating lever 20 is pulled along the third direction, the second operating lever 20 drives the rotating shaft 31 to rotate along the second direction.

[0055] Since the first end of the first connecting rod 321 is connected to the rotating shaft 31, and the first connecting rod 321 extends along a third direction, the rotation of the rotating shaft 31 can drive the first connecting rod 321 to move along the third direction. Since the second connecting rod 322, which extends along the first direction, is connected to the first connecting rod 321, the second connecting rod 322 can move along the third direction with the first connecting rod 321. Furthermore, since the two ends of the third connecting rod 323 are respectively connected to the second connecting rod 322 and the main valve 3, the third connecting rod 323 and the main valve 3 are further driven to move along the third direction.

[0056] The second operating lever 20 is connected to the main valve 3 through multiple linkages, without changing the internal spring and operating mechanism of the valve core of the main valve 3, thus ensuring that the operating force characteristics and control performance of the main valve 3 are not affected.

[0057] In one embodiment, reference Figure 2 and Figure 3 The rotating shaft 31 may include a rotating part 311 and a fixed part 312. The rotating part 311 is rotatably connected to the fixed part 312. For example, the fixed part 312 is a shaft body, and the rotating part 311 is a bushing. The bushing is fitted onto the shaft body to form relative rotation. The shaft body is connected to the structural components of the truck-mounted crane, which may be the outrigger box or the underframe of the truck-mounted crane.

[0058] The second operating lever 20 and the first connecting rod 321 can both be installed on the rotating part 311 by means of threaded connection, welding or snap-fit, etc. The fixing part 312 is used to install the rotating shaft 31 on the structural parts of the truck crane. The fixing part 312 can be connected to the structural parts of the truck crane by means of threaded connection or welding or other means.

[0059] By using the fixing part 312 of the rotating shaft 31, the rotating shaft 31 can be mounted on the structural components of the truck-mounted crane, thereby increasing the structural strength of the rotating shaft 31.

[0060] In one embodiment, reference Figure 4 and Figure 5 The connector 30 includes a flexible shaft 33, which can be a metal strip structure with flexibility. The material of the flexible shaft 33 can be spring steel or alloy steel.

[0061] refer to Figure 5 The second operating lever 20 includes an operating part 21 and a connecting part 22. The operating part 21 extends in a first direction, that is, it extends in a left-right direction. The connecting part 22 extends in a third direction, that is, it extends in a vertical direction. The bottom of the connecting part 22 is connected to the operating part 21. The connecting part 22 can be welded to the operating part 21, threadedly connected, or integrally formed with the operating part 21. A rib can also be provided between the operating part 21 and the connecting part 22. One side of the rib is connected to the operating part 21, and the other side is connected to the connecting part 22 to enhance the structural strength of the second operating lever 20.

[0062] refer to Figure 5The first end of the flexible shaft 33 is rotatably connected to the top of the connecting portion 22. For example, a connecting shaft 34 extending in a second direction is provided through the top of the connecting portion 22, and the top of the connecting portion 22 can rotate around the connecting shaft 34. The first end of the flexible shaft 33 has a first connecting structure 331 and a second connecting structure 332. The first end of the first connecting structure 331 is inserted into the connecting shaft 34, and the second end of the first connecting structure 331 is connected to the second connecting structure 332 by means of threaded connection, snap-fit, etc. The second connecting structure 332 is connected to the first end of the flexible shaft 33, and the second connecting structure 332 can be integrally formed with the flexible shaft 33.

[0063] The second end of the flexible shaft 33 is connected to the side of the main valve 3 facing away from the first operating lever 10.

[0064] Since the bottom of the operating part 21 is connected to the bottom of the connecting part 22, and the first end of the flexible shaft 33 is rotatably connected to the top of the connecting part 22, the operating part 21, the connecting part 22, and the flexible shaft 33 form a lever structure. When the operating part 21 is pressed down along the third direction, the connecting part 22 and the flexible shaft 33 rotate relative to each other, thus tightening the flexible shaft 33. Since the second end of the flexible shaft 33 is connected to the side of the main valve 3 facing away from the first operating lever 10, when the flexible shaft 33 is tightened, it can pull the valve core of the main valve 3 to move and complete the reversal, thereby realizing the operation on the side of the second operating lever 20.

[0065] Flexible shaft drives are characterized by flexible arrangement and strong adaptability of transmission paths, which can reduce force loss during transmission and make operation easier.

[0066] In one embodiment, reference Figure 4 and Figure 5 The connector 30 also includes a first bushing 35 and a second bushing 36. The first bushing 35 is fitted onto the portion of the flexible shaft 33 near the first operating lever 10, and the second bushing 36 is fitted onto the portion of the flexible shaft 33 near the second operating lever 20. The first bushing 35 and the second bushing 36 can be made of elastic rubber or plastic. This design allows the first bushing 35 or the second bushing 36 to deform synchronously with the bending and slight deformation of the flexible shaft 33, preventing scratches on the flexible shaft 33.

[0067] By providing a first bushing 35 and a second bushing 36 on the outer periphery of the flexible shaft 33, wear on the flexible shaft 33 can be reduced and the flexible shaft 33 can be protected.

[0068] In one embodiment, reference Figure 4 and Figure 5 The second operating component 2 also includes a first card plate 37 and a second card plate 38.

[0069] The first mounting plate 37 has a first mounting hole 371 and a first mounting part. The first bushing 35 passes through the first mounting hole 371. The first mounting part is used to connect to structural components on the truck-mounted crane. The first mounting part can be a threaded connection, a snap-fit ​​connection, or other connection structure. The structural components on the truck-mounted crane can be the outrigger box or the base frame of the truck-mounted crane. By setting the first mounting plate 37, the first bushing 35 can be connected to the structural components on the truck-mounted crane, thereby supporting and protecting the side of the flexible shaft 33 near the first operating lever 10.

[0070] The second mounting plate 38 has a second mounting hole 381 and a second mounting part. The second bushing 36 passes through the second mounting hole 381, and the second mounting part is used to connect to structural components on the truck-mounted crane. The structural components on the truck-mounted crane can be the outrigger box or the underframe of the truck-mounted crane. By setting the second mounting plate 38, the second bushing 36 can be connected to the structural components on the truck-mounted crane, thereby supporting and protecting the side of the flexible shaft 33 near the second operating lever 20.

[0071] In one embodiment, reference Figures 1-5 The operating end of the first operating lever 10 has a first handle portion 11, which can be block-shaped or column-shaped for easy operation by the operator. By providing the first handle portion 11 at the operating end of the first operating lever 10, it is convenient for the operator to pull the first operating lever 10.

[0072] And / or, the operating end of the second operating lever 20 has a second handle portion 23. The second handle portion 23 may be block-shaped or column-shaped for easy operation by the operator. By providing the second handle portion 23 at the operating end of the second operating lever 20, it is convenient for the operator to pull the second operating lever 20.

[0073] According to an embodiment of the present invention, another aspect provides a truck-mounted crane, including an actuator, a main valve 3, and a two-way operating system for the truck-mounted crane as described in any of the above embodiments.

[0074] The main valve 3 is connected to the actuator, which can be a structure that performs telescopic, slewing, and other actions on a crane or other truck-mounted crane.

[0075] The first operating lever 10 and the connecting piece 30 of the two-way operating system of the truck-mounted crane are both connected to the main valve 3.

[0076] Since the truck-mounted crane provided by this utility model includes the bidirectional operating system of the truck-mounted crane mentioned in any of the above-mentioned items, it has at least the beneficial effects mentioned in any of the above-mentioned items, which will not be elaborated here.

[0077] It should be noted that the truck-mounted crane's two-way operating system and the number of main valves 3 can be multiple. Each main valve 3 is connected to the corresponding two-way operating system of the truck-mounted crane, and each main valve 3 is connected to an actuator. Multiple main valves 3 control the actuator to perform different actions such as extension, retraction, outward rotation, and inward rotation.

[0078] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0079] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A two-way operating system for a truck-mounted crane, characterized in that, include: The first operating component (1) includes a first operating lever (10) which is connected to the main valve (3) of the truck-mounted crane. The second operating component (2) includes a second operating lever (20) and a connector (30). The second operating lever (20) is located on the side opposite to the first operating lever (10). One end of the connector (30) is connected to the second operating lever (20), and the other end of the connector (30) is connected to the main valve (3). Displacement sensors, controllers, and control valves; The displacement sensor is installed inside the main valve (3) and is used to detect the valve core displacement of the main valve (3); Both the displacement sensor and the control valve are electrically connected to the controller. The control valve is used to adjust the throttle opening and closing degree of the truck-mounted crane according to the valve core displacement.

2. The bidirectional operating system for truck-mounted cranes according to claim 1, characterized in that, The connector (30) includes a rotating shaft (31) and a linkage mechanism (32); The second operating lever (20) extends along a first direction, and the rotating shaft (31) is connected to the second operating lever (20), and the axis of the rotating shaft (31) extends along a second direction; One end of the linkage mechanism (32) is connected to the rotating shaft (31), and the other end is connected to the main valve (3).

3. The bidirectional operating system for truck-mounted cranes according to claim 2, characterized in that, The linkage mechanism (32) includes a first link (321), a second link (322) and a third link (323); The first end of the first link (321) is connected to the rotating shaft (31), the first link (321) extends in a third direction, and the second end of the first link (321) is connected to the first end of the second link (322). The second link (322) extends along the first direction, and the second end of the second link (322) is connected to the first end of the third link (323), and the second end of the third link (323) is connected to the main valve (3).

4. The bidirectional operating system for truck-mounted cranes according to claim 3, characterized in that, The rotating shaft (31) includes a rotating part (311) and a fixed part (312), wherein the rotating part (311) is rotatably connected to the fixed part (312); The second operating lever (20) and the first connecting rod (321) are both mounted on the rotating part (311), and the fixing part (312) is used to mount the rotating shaft (31) on the structural component of the truck crane.

5. The bidirectional operating system for truck-mounted cranes according to claim 1, characterized in that, The connector (30) includes a flexible shaft (33); The second operating lever (20) includes an operating part (21) and a connecting part (22); The operating part (21) extends in a first direction, and the connecting part (22) extends in a third direction; The operating part (21) is connected to the bottom of the connecting part (22), the first end of the flexible shaft (33) is rotatably connected to the top of the connecting part (22), and the second end of the flexible shaft (33) is connected to the side of the main valve (3) facing away from the first operating lever (10).

6. The bidirectional operating system for truck-mounted cranes according to claim 5, characterized in that, The connector (30) also includes a first bushing (35) and a second bushing (36); The first bushing (35) is fitted on the portion of the flexible shaft (33) near the first operating lever (10), and the second bushing (36) is fitted on the portion of the flexible shaft (33) near the second operating lever (20).

7. The bidirectional operating system for truck-mounted cranes according to claim 6, characterized in that, The second operating component (2) also includes a first card plate (37) and a second card plate (38); The first plate (37) has a first mounting hole (371) and a first mounting part. The first bushing (35) passes through the first mounting hole (371). The first mounting part is used to connect the structural components on the truck crane. The second plate (38) has a second mounting hole (381) and a second mounting part, the second bushing (36) passes through the second mounting hole (381), and the second mounting part is used to connect the structural components on the truck crane.

8. The bidirectional operating system for truck-mounted cranes according to any one of claims 1-7, characterized in that, The operating end of the first operating lever (10) has a first handle portion (11). And / or, the operating end of the second operating lever (20) has a second handle portion (23).

9. A truck-mounted crane, characterized in that, Includes an actuator, a main valve (3), and a two-way operating system for the truck-mounted crane as described in any one of claims 1-8; The main valve (3) is connected to the actuator; The first operating lever (10) and the connecting piece (30) of the bidirectional operating system of the truck-mounted crane are both connected to the main valve (3).

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