A outrigger positioning device for an off-road tyre crane

Abstract

The application discloses a outrigger positioning device of an off-road tire crane, and belongs to the technical field of cranes, which comprises a rack, a controller is assembled on one side of the front end of the rack, fixed blocks are fixedly installed at both ends of the rack, supporting legs are rotatably assembled between the two groups of fixed blocks, hydraulic rods are installed at the end of the supporting legs, supporting seats are arranged at the end of the hydraulic rods, and auxiliary components for improving work safety are arranged beside the supporting legs. The application discloses a driving assembly, which discards the traditional driving mode of single hydraulic cylinder and single supporting leg, can realize synchronous operation of two supporting legs on the same side, effectively reduces the production investment cost of the equipment, can stably lock the working posture of the supporting leg by relying on the self-locking characteristics of the screw rod thread, prevents the deflection of the supporting leg caused by faults, and avoids shaking and deviation in the work process by matching the arc-shaped limiting structure to constrain the movement track of the supporting leg, so that the stability and reliability of the whole machine supporting work are remarkably improved.

Description

Technical Field

[0001] This invention belongs to the field of crane technology, and specifically relates to a leg positioning device for an all-terrain tire crane. Background Technology

[0002] In engineering operations, all-terrain tire cranes are widely used in various complex terrains due to their strong adaptability and stability. A key feature of all-terrain tire cranes is their ability to mount tires as the base for moving and carrying equipment.

[0003] Existing outrigger positioning devices for all-terrain cranes generally use a single hydraulic rod to drive the rotation of a single outrigger to complete the positioning and support. This structure is relatively expensive, and when the hydraulic components fail, the outrigger is prone to unexpected deflection, resulting in insufficient operational stability. At the same time, the conventional structure relies solely on the support base to bear the frame load and lacks auxiliary protective support structures, resulting in weak overall machine operation protection capabilities and a low overall safety factor. Summary of the Invention

[0004] To address the problems mentioned in the background section, this invention provides a leg positioning device for an all-terrain tire crane, which features lower structural cost and better operational stability.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a leg positioning device for an all-terrain tire crane, comprising a frame, a controller mounted on one side of the front end of the frame, fixing blocks fixedly mounted at both ends of the frame, a support leg rotatably mounted between the two sets of fixing blocks, a hydraulic rod mounted at the end of the support leg, a support seat mounted at the end of the hydraulic rod, auxiliary components for improving operational safety arranged beside the support leg, and drive components for driving the rotation of the support leg mounted on both sides of the upper part of the frame;

[0006] The drive assembly includes a strip box, which is fixedly installed at the center of both sides of the upper part of the frame. A motor is installed at the top of the strip box, and the output end of the motor is connected to a lead screw. A threaded seat is threaded on the outer side of the lead screw. A movable seat is slidably installed on the upper part of the frame corresponding to the position of the threaded seat. A sliding groove matching the movable seat is opened inside the frame. The movable seat and the threaded seat are rigidly connected by a crossbar. A hinged rotating rod connects the movable seat and the support leg.

[0007] Preferably, the drive assembly further includes an arc-shaped plate, which is positioned above the fixed block and the two are fixedly connected by a connecting column. An arc-shaped groove is formed on the side of the arc-shaped plate, and a slider is slidably assembled inside the arc-shaped groove. The slider is connected to the support leg by a connecting rod.

[0008] Preferably, the two ends of the rotating rod are respectively hinged to the movable seat and the support leg by means of a pivot pin, and the side wall of the movable seat is in close sliding fit with the inner wall of the slide groove.

[0009] Preferably, the bottom end of the support base has several tapered protrusions evenly arranged, and a bearing rotating seat is installed at the connection between the lead screw and the strip box.

[0010] Preferably, the support leg is rotatably connected to the fixed block via a pivot, and the arc-shaped groove is formed on the side wall of the arc-shaped plate with the pivot as the center.

[0011] Preferably, the auxiliary component includes a fixed cylinder, which is fixedly disposed on the side of the support leg. A screw is threaded inside the fixed cylinder, a knob is fixedly disposed at the top of the screw, a movable plate is connected to the bottom of the screw, a sliding column is fixedly connected to the lower end of the movable plate, and a cross plate is fixedly installed at the bottom of the sliding column.

[0012] Preferably, the auxiliary component further includes a fixing seat, which is fixedly installed on the output end of the hydraulic rod. A locking block is fixedly provided on the top of the support seat, and a slot adapted to the locking block is opened at the bottom of the fixing seat. The locking block and the fixing seat are locked together by fixing bolts, and fixing holes matching the fixing bolts are opened on the side wall of the locking block.

[0013] Preferably, a bearing rotating seat is assembled between the screw and the moving plate, and a threaded hole adapted to the screw is opened at the top of the fixed cylinder.

[0014] Preferably, the bottom end of the fixed cylinder has a sliding hole adapted to the sliding column, and the sliding column adopts a rectangular cross-section structure.

[0015] Preferably, after the card block is embedded in the card slot, its outer wall fits tightly against the inner wall of the card slot, and the side wall of the fixing seat has a through hole for the fixing bolt to be inserted.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. By setting up a drive component, this invention abandons the traditional single hydraulic cylinder-controlled leg drive mode, enabling synchronous operation of two outriggers on the same side, effectively reducing equipment production costs. Relying on the self-locking characteristics of the screw thread, it can stably lock the working posture of the outriggers, preventing outrigger deflection caused by malfunctions. Combined with the arc-shaped limit structure to constrain the movement trajectory of the outriggers, it avoids shaking and deviation during operation, significantly improving the stability and reliability of the entire machine's support operation.

[0018] 2. By setting a limiting and coordinating structure, the present invention can form a lateral limiting constraint throughout the entire rotation adjustment of the outrigger, accurately control the rotation range of the outrigger, prevent abnormal swinging and deviation of the outrigger, ensure smooth linkage of the overall transmission structure, and provide stable and continuous action response. It effectively improves the shortcomings of insufficient positioning accuracy of the original device, makes the outrigger positioning operation more regular and standardized, and further strengthens the safety foundation of crane operation from the structural level.

[0019] 3. By setting auxiliary components, this invention can form a secondary bottom support protection after the main support structure is subjected to force. Even if the hydraulic components suddenly fail, it can effectively offset the falling force and avoid the risk of equipment tipping over. At the same time, the snap-bolt combination disassembly and assembly structure allows for quick disassembly and replacement of worn parts, making maintenance simple and time-saving. It can also maintain stable support and load-bearing performance for a long time, greatly improving the overall practicality and adaptability. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present invention;

[0021] Figure 2 This is a bottom-view perspective view of the present invention;

[0022] Figure 3 This is a cross-sectional perspective view of the present invention;

[0023] Figure 4 This is a cross-sectional perspective view of the support leg of the present invention;

[0024] Figure 5 This is a perspective view of the support base of the present invention during installation;

[0025] In the diagram: 1. Frame; 2. Drive assembly; 21. Strip box; 22. Motor; 23. Slide groove; 24. Moving seat; 25. Rotating rod; 26. Crossbar; 27. Lead screw; 28. Threaded seat; 29. ​​Arc plate; 210. Connecting column; 211. Arc groove; 212. Slider; 213. Connecting rod; 3. Auxiliary assembly; 31. Fixed cylinder; 32. Screw; 33. Knob; 34. Moving plate; 35. Slide column; 36. Cross plate; 37. Fixed seat; 38. Locking block; 39. Locking groove; 310. Fixing bolt; 311. Fixing hole; 4. Controller; 5. Fixing block; 6. Support leg; 7. Hydraulic rod; 8. Support base. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] See Figure 1-5A leg positioning device for an all-terrain tire crane includes a frame 1, which serves as the overall load-bearing base for the device, providing stable mounting points and load-bearing support for all components. A controller 4 is fixedly mounted on one side of the front end of the frame 1, allowing operators to uniformly control the equipment's start-up and shutdown, as well as various operational actions such as outrigger extension, retraction, and rotation. Fixed blocks 5 are fixedly mounted on both ends of the frame 1, with support legs 6 rotatably mounted between the two sets of opposing fixed blocks 5. The support legs 6 can rotate and retract using the fixed blocks 5 as fulcrums, flexibly adjusting their operational support posture. A hydraulic rod 7 is fixedly mounted on the end of the support leg 6 furthest from the frame 1, outputting vertical support force through the extension and retraction of the hydraulic rod 7. A support seat 8 is provided at the extension end of the hydraulic rod 7, directly contacting the ground to complete the load-bearing support operation of the entire machine. Auxiliary components 3 are arranged on the side of the support leg 6 to enhance the safety protection capability during equipment operation. Drive components 2 are symmetrically mounted on both sides of the upper part of the frame 1, and the entire drive component 2 can stably drive the support legs 6 to complete rotation and swinging movements.

[0028] See Figure 1-4 The drive assembly 2 includes a strip box 21. The strip box 21 is fixedly installed at the center of both sides of the upper part of the frame 1. The strip box 21 can protect and limit the internal transmission components. The motor 22 is fixedly installed at the top of the strip box 21. The motor 22 outputs rotational torque as a power source. The output shaft of the motor 22 is connected to the lead screw 27. The lead screw 27 is vertically arranged in the internal cavity of the strip box 21. The outer surface of the lead screw 27 is threaded with a thread seat 28. The thread seat 28 can rotate with the lead screw 27 to achieve vertical displacement. The movable seat 24 is slidably installed on the upper part of the frame 1 corresponding to the position of the thread seat 28. The frame 1 has a groove 23 with specifications matching the movable seat 24. The movable seat 24 and the thread seat 28 are rigidly fixedly connected by a crossbar 26 to ensure that their displacement movements are completely synchronized. The movable seat 24 and the side wall of the support leg 6 are hinged to a rotating rod 25 to realize the power transmission conversion.

[0029] See Figure 1-3The drive assembly 2 also includes an arc-shaped plate 29, which is stably mounted above the fixed block 5. Multiple connecting columns 210 are vertically fixed between the bottom surface of the arc-shaped plate 29 and the top surface of the fixed block 5. The connecting columns 210 are evenly arranged to form a solid support structure, effectively locking the installation position of the arc-shaped plate 29 so that it will not shake or shift during equipment operation. The side of the arc-shaped plate 29 has an arc-shaped groove 211 cut along the arc trajectory. The inner wall of the arc-shaped groove 211 is smoothly processed to reduce sliding friction resistance. The slider 212 is slidably assembled inside the arc-shaped groove 211. The outer dimensions of the slider 212 are precisely matched with the internal space of the groove, allowing it to slide flexibly and smoothly along the inner wall of the arc-shaped groove 211. A connecting rod 213 is horizontally fixed to the outer end face of the slider 212. The other end of the connecting rod 213 is firmly connected and fixed to the side wall surface of the support leg 6. When the support leg 6 performs a rotary swing operation, it can drive the slider 212 to move synchronously along the trajectory of the arc-shaped groove 211, effectively limiting the swing amplitude of the support leg 6 and avoiding the problem of lateral displacement of the support leg.

[0030] See Figure 1-3 Both ends of the rotating rod 25 adopt a pivot pin hinge structure, which is rotatably connected to the side of the moving seat 24 and the outer wall of the support leg 6 respectively. The hinge structure rotates flexibly without jamming, and the power transmission is smooth and stable. The moving seat 24 is embedded in the slide groove 23 inside the frame 1. The outer wall of the moving seat 24 is tightly fitted with the inner wall of the slide groove 23 to form a sliding fit. The moving seat 24 slides in a straight line along the preset route of the slide groove 23 throughout the entire process. The overall operation is stable and there will be no adverse working conditions such as lateral deviation, shaking, or jamming.

[0031] See Figure 1-3 The bottom surface of the support base 8 is evenly distributed with multiple sets of integrally formed conical protrusions. The protrusion structure has high hardness and excellent wear resistance. When the equipment is supported on the ground, it can effectively increase the contact friction between the support base 8 and the ground, and prevent the crane from slipping and shifting during operation. The upper and lower ends of the lead screw 27 are equipped with bearing rotating seats at the connection positions with the box body of the strip box 21. The bearing structure can significantly reduce the mechanical friction resistance generated during the rotation of the lead screw 27, reduce the wear and tear of parts, and ensure the stable rotation transmission of the lead screw 27 for a long time.

[0032] See Figure 1-3 The support leg 6 is installed between two sets of fixed blocks 5 through a horizontal pivot at its base. The support leg 6 can rotate freely to switch between extension and retraction. The arc groove 211 on the side wall of the arc plate 29 is precisely machined with the central pivot as the center. The arc trajectory of the arc groove 211 is perfectly matched with the actual rotation and swing path of the support leg 6, which can accurately constrain the maximum rotation angle of the support leg 6, prevent the support leg from swinging too much and hitting the surrounding components, and ensure the safety of equipment operation.

[0033] See Figure 1-5The auxiliary component 3 includes a fixed cylinder 31, which is vertically and firmly fixed to the outer wall of the support leg 6. The overall installation structure is tight and stable. The hollow cavity inside the fixed cylinder 31 is machined with internal threads, and the internal threads of the cavity are matched with the screw 32. The screw 32 can move vertically up and down inside the fixed cylinder 31 by means of thread meshing transmission. A knob 33 is fixedly installed on the top end face of the screw 32. The operator can easily control the lifting, stopping and movement of the screw 32 by manually turning the knob 33. A moving plate 34 is fixedly connected to the bottom end face of the screw 32. The moving plate 34 follows the screw 32 to complete the vertical displacement action synchronously. A sliding column 35 is vertically fixedly connected to the lower surface of the moving plate 34. The sliding column 35 extends downward in the vertical direction. A cross plate 36 is fixedly installed at the bottom of the sliding column 35. The cross plate 36 has a wide contact area and can form a large-area stable support surface after landing.

[0034] See Figure 1-5 The auxiliary component 3 also includes a fixed base 37, which is fastened to the telescopic output end of the hydraulic rod 7 and serves as a reference base for the disassembly and assembly of the support base 8. A fixed block 38 is integrally formed at the center of the top surface of the support base 8. A slot 39 with the same outer dimensions as the slot 38 is opened on the lower end surface of the fixed base 37. During equipment assembly and maintenance, the slot 38 can be accurately embedded into the slot 39 to complete the initial positioning and docking. A fixing bolt 310 is inserted between the fixed base 37 and the slot 38 to lock and fix them. A fixing hole 311 is opened laterally on the side wall of the slot 38. The diameter of the fixing hole 311 matches the rod body of the fixing bolt 310 to facilitate the bolt to pass through and complete the locking and positioning.

[0035] See Figure 3 A bearing rotating seat is installed at the connection position between the bottom end of the screw 32 and the moving plate 34. The bearing can isolate the torsional force generated by the rotation of the screw 32. During the rotation of the screw 32, it will not drive the moving plate 34 to rotate together, but will only drive the moving plate 34 to make a pure vertical linear motion. A threaded hole that matches the outer diameter of the screw 32 is opened at the center of the top of the fixed cylinder 31. The thread precision of the inner wall of the threaded hole is good, which can ensure that the screw 32 rotates and rises smoothly and stably without jamming or stuck.

[0036] See Figure 4 The bottom center of the fixed cylinder 31 is provided with a sliding hole adapted to the vertical movement of the sliding column 35. The inner wall of the sliding hole is regular and smooth. The sliding column 35 adopts a rectangular cross-section structure design. The rectangular structure can effectively limit the rotation behavior of the sliding column 35, prevent rotational deviation, and ensure that the vertical movement trajectory of the sliding column 35 is straight and stable throughout the process.

[0037] See Figure 5After the card block 38 is fully embedded in the card slot 39, the outer wall of the card block 38 and the inner wall of the card slot 39 fit tightly without gaps, resulting in high assembly positioning accuracy and strong overall connection. The side wall of the fixing seat 37 has a through hole at the corresponding position for the fixing bolt 310 to be inserted laterally. The through hole positions are aligned and regular, making it convenient for the bolt to be quickly inserted and locked. After assembly, the connection is firm and reliable, and there will be no loosening or separation under load.

[0038] The working principle and usage process of this invention are as follows: When carrying out support and positioning operations, the operator starts the motor 22 by issuing a running command through the controller 4. The motor 22 outputs rotational torque to drive the lead screw 27 to rotate continuously at a uniform speed. The rotation of the lead screw 27 drives the outer threaded seat 28 to make vertical displacement along the inner cavity of the strip box 21. During the movement of the threaded seat 28, the rigidly connected crossbar 26 synchronously drives the moving seat 24, so that the moving seat 24 slides smoothly downward along the inner slide groove 23 of the frame 1. When the moving seat 24 slides down, it pushes the hinged rotating rod 25 to deflect at an angle. The rotating rod 25 further pushes the support leg 6, causing the support leg 6 to slowly rotate and swing around the inner rotating shaft of the fixed block 5 until the support leg 6 rotates and adjusts to a horizontal standard working posture.

[0039] After the posture adjustment is completed, the hydraulic rod 7 extends outward, and the hydraulic rod 7 pushes the end support seat 8 to press tightly against the ground, so as to smoothly raise the frame 1 to the specified working height and successfully complete the crane's overall support and positioning process. This device adopts an integrated drive structure, which can drive the two support legs 6 on the same side to rotate synchronously. It abandons the traditional structure mode of equipping a single support leg with a separate hydraulic cylinder, effectively reducing the equipment's production and processing costs. At the same time, the screw 27 has excellent thread self-locking performance, which can firmly lock the position of the support leg and effectively prevent the support leg 6 from moving unexpectedly during operation, greatly improving the safety factor of crane operation.

[0040] During the entire process of adjusting the rotation angle of the support leg 6, the connecting rod 213 connected to the side wall of the support leg 6 drives the end slider 212 to slide smoothly along the predetermined trajectory of the arc groove 211 on the side of the arc plate 29. With the help of the limiting and guiding structure of the arc plate 29, it can effectively limit the lateral displacement and swaying of the support leg 6, and accurately control the rotation amplitude and limit stroke range of the support leg 6, so as to avoid structural collision damage caused by the excessive swing of the support leg.

[0041] When the support leg 6 is in a horizontal working state, the hydraulic rod 7 drives the support seat 8 to compact the ground and stably lift the frame 1. Then, the operator manually turns the knob 33. The knob 33 drives the screw 32 to rotate synchronously. The screw 32 moves vertically downward along the inside of the fixed cylinder 31 by means of thread transmission. The downward movement of the screw 32 synchronously drives the bottom moving plate 34 and the sliding column 35 to descend vertically together. Finally, the cross plate 36 at the bottom of the sliding column 35 firmly presses against the ground. The auxiliary component 3 and the hydraulic support structure work together to build a double safety support and protection system. Even if the hydraulic rod 7 suddenly fails and loses its support load-bearing capacity during operation, the cross plate 36 can still hold the machine body, effectively preventing the crane body from falling rapidly and effectively avoiding major safety accidents such as equipment tipping over.

[0042] The support base 8 is subjected to the heavy pressure of the entire machine and friction wear from the ground for a long time, making it prone to wear, deformation and damage. Routine inspection, replacement and maintenance operations are simple and quick. During maintenance, simply unscrew the fixing bolt 310 inside the fixing hole 311 on the side wall of the locking block 38 to remove the aged and damaged support base 8 from the bottom of the fixing base 37. Select a new support base 8, align its top locking block 38 with the locking groove 39 at the bottom of the fixing base 37 to complete the alignment, and then insert the fixing bolt 310 horizontally and tighten it to lock it. The replacement of the support base 8 parts can be completed quickly to ensure that the equipment support structure always has a stable and reliable load-bearing capacity.

[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A positioning device for the outriggers of an off-road tyre crane comprising a frame (1), characterised in that: The frame (1) is equipped with a controller (4) on one side of the front end. Fixed blocks (5) are fixedly installed at both ends of the frame (1). Support legs (6) are rotatably mounted between the two sets of fixed blocks (5). Hydraulic rods (7) are installed at the ends of the support legs (6). Support seats (8) are provided at the ends of the hydraulic rods (7). Auxiliary components (3) for improving operational safety are arranged on the side of the support legs (6). Drive components (2) that can drive the support legs (6) to rotate are installed on both sides of the upper part of the frame (1). The drive assembly (2) includes a strip box (21). The strip box (21) is fixedly installed at the center of both sides of the upper part of the frame (1). A motor (22) is installed at the top of the strip box (21). The output end of the motor (22) is connected to a lead screw (27). A threaded seat (28) is threaded on the outside of the lead screw (27). A movable seat (24) is slidably installed on the upper part of the frame (1) at the position corresponding to the threaded seat (28). A sliding groove (23) matching the movable seat (24) is opened inside the frame (1). The movable seat (24) and the threaded seat (28) are rigidly connected by a crossbar (26). A hinged rotating rod (25) is connected between the movable seat (24) and the support leg (6).

2. An outrigger positioning device for an off-the-road tire crane as set forth in claim 1, characterized in that: The drive assembly (2) is also provided with an arc plate (29), which is located above the fixed block (5). The two are fixedly connected by a connecting column (210). An arc groove (211) is opened on the side of the arc plate (29). A slider (212) is slidably assembled inside the arc groove (211). The slider (212) is connected to the support leg (6) by a connecting rod (213).

3. The outrigger positioning device for an all-terrain tire crane according to claim 1, characterized in that: The two ends of the rotating rod (25) are respectively hinged to the movable seat (24) and the support leg (6) by means of the shaft pin. The side wall of the movable seat (24) is in contact with the inner wall of the slide groove (23) for sliding cooperation.

4. The outrigger positioning device for an all-terrain tire crane according to claim 1, characterized in that: The bottom of the support base (8) is evenly arranged with several conical protrusions, and a bearing rotating seat is installed at the connection between the lead screw (27) and the strip box (21).

5. The outrigger positioning device for an all-terrain tire crane according to claim 3, characterized in that: The supporting leg (6) is rotatably connected to the fixed block (5) via a rotating shaft, and the arc groove (211) is opened on the side wall of the arc plate (29) with the rotating shaft as the center.

6. The outrigger positioning device for an all-terrain tire crane according to claim 1, characterized in that: The auxiliary component (3) includes a fixed cylinder (31), which is fixedly mounted on the side of the support leg (6). The fixed cylinder (31) is threaded with a screw (32), and a knob (33) is fixedly mounted on the top of the screw (32). The bottom of the screw (32) is connected to a moving plate (34), and a sliding column (35) is fixedly connected to the lower end of the moving plate (34). A cross plate (36) is fixedly installed at the bottom of the sliding column (35).

7. The outrigger positioning device for an all-terrain tire crane according to claim 6, characterized in that: The auxiliary component (3) also includes a fixed seat (37), which is fixedly installed on the output end of the hydraulic rod (7). A locking block (38) is fixedly provided on the top of the support seat (8). A slot (39) adapted to the locking block (38) is opened at the bottom of the fixed seat (37). The locking block (38) and the fixed seat (37) are locked and fixed by a fixing bolt (310). A fixing hole (311) matching the fixing bolt (310) is opened on the side wall of the locking block (38).

8. The outrigger positioning device for an all-terrain tire crane according to claim 7, characterized in that: A bearing rotating seat is assembled between the screw (32) and the moving plate (34), and a threaded hole adapted to the screw (32) is opened at the top of the fixed cylinder (31).

9. The outrigger positioning device for an all-terrain tire crane according to claim 7, characterized in that: The bottom end of the fixed cylinder (31) is provided with a sliding hole adapted to the sliding column (35), and the sliding column (35) adopts a rectangular cross-section structure.

10. The outrigger positioning device for an all-terrain tire crane according to claim 8, characterized in that: After the card block (38) is embedded in the card slot (39), its outer wall fits tightly against the inner wall of the card slot (39), and the side wall of the fixing seat (37) has a through hole for the fixing bolt (310) to pass through.

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