Pump-controlled double-winch system of crawler crane

Abstract

The utility model relates to the technical field of cranes, in particular to a crawler crane pump control double-winch system which comprises a crane rack and a suspension arm, the suspension arm is arranged above the crane rack, a supporting plate is fixedly connected above the suspension arm, a pump control double-winch mechanism is arranged above the supporting plate, and a support is fixedly connected to the upper surface of the supporting plate. The fixed pump sucks hydraulic oil from the oil tank, pressurizes the hydraulic oil and then feeds the hydraulic oil into the hydraulic motor, the variable pump is used for changing the flow and pressure of the hydraulic oil so as to control the speed of the hydraulic motor, the reversing valve achieves forward and reverse rotation of the output direction of the hydraulic motor, the hydraulic motor drives the winding roller to rotate through the reversing valve, the winding roller unwinds the lifting rope, and the lifting rope drives the supporting plate to descend. The reversing valve controls the winding roller to rotate reversely, the winding roller winds the lifting rope, friction between the lifting rope and the winding roller is small, and the timeliness of damage to the lifting rope and the uncertainty of fracture of the lifting rope are relieved.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a pump-controlled double-winch system for a crawler crane. Background Art

[0002] With the expansion of the application scenarios of cranes in engineering operations, the lifting systems of cranes are increasingly designed with double winches and single hooks to improve the lifting capacity of cranes.

[0003] For example, the patent number CN110683474A is a synchronous control method and device for a crane double winch hoisting system, including a controller, two laser rangefinders, two ranging baffles, and two rotary encoders; the two laser rangefinders are symmetrically fixed on both sides of the crane boom; the two ranging baffles are symmetrically fixed on both sides of the hook; the laser rangefinder is used to collect the distance between the two sides of the hook and the crane boom. The above document still has deficiencies. When in use, the distance signal of the laser rangefinder is differentiated to determine whether the laser ranging control is effective. If it fails, the control mode is switched to the encoder-based control mode. The synchronous control of code feedback and the code feedback control method as a backup control method further improve the safety of the entire control process. However, the rope needs to cross the distance between the two pulley blocks, which easily causes the pulley block to be unbalanced. Not only are the transmission components such as the bearings inside the pulley block easily damaged due to the unbalanced load, but the rope will also be worn due to friction between the rope and the pulley, which accelerates the timeliness of the rope damage and the uncertainty of its breakage, resulting in low safety of the winch system. At the same time, when the rope is reeled in, the rope is easily accumulated on one side of the outer wall of the reel, which makes it inconvenient to evenly wind the rope around the outer wall of the reel. Utility Model Content

[0004] The utility model aims to solve the problem of low safety of a winch system and proposes a crawler crane pump-controlled double winch system.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A crawler crane pump-controlled double winch system is designed, comprising a crane frame and a boom, a boom is arranged above the crane frame, a support plate is fixedly connected above the boom, a pump-controlled double winch mechanism is arranged above the support plate, a bracket is fixedly connected to the upper surface of the support plate, a uniform wire arrangement mechanism is arranged inside the bracket, a roller is rotatably connected to the inside of the support plate through a bearing, and an operating room is fixedly connected above the crane frame.

[0007] Preferably, the pump-controlled double winch mechanism includes a fixed pump, which is fixedly connected to the upper surface of the support plate, and the output end of the fixed pump is fixedly connected to a variable pump, and the output end of the variable pump is fixedly connected to a hydraulic motor, and the variable pump and the hydraulic motor are both fixedly connected to the upper surface of the support plate, and the two output ends of the hydraulic motor are both fixedly connected to a reversing valve, and the reversing valve is fixedly connected to the outer wall of the bracket, and the output end of the reversing valve is fixedly connected to a rotating rod, and the outer walls at both ends of the rotating rod are rotatably connected to the bracket through bearings, and the outer wall of the rotating rod is fixedly connected to a winding roller, and the outer wall of the winding roller is wrapped with a lifting rope.

[0008] Preferably, the uniform wire arrangement mechanism includes a reciprocating screw, the outer walls at both ends of the reciprocating screw are rotatably connected to the bracket through bearings, the end of the reciprocating screw is fixedly connected with a first gear, the first gear is meshingly connected with a second gear, the second gear is fixedly connected to the end of the rotating rod, the outer wall of the reciprocating screw is threadedly connected with a screw nut, and the outer wall of the screw nut is fixedly connected with a ring.

[0009] Preferably, walking tracks are provided on both the front and rear sides of the crane frame.

[0010] Preferably, a support plate is fixedly connected to the end of the suspension rope, and a bearing seat is fixedly connected below the support plate.

[0011] Preferably, a hook is rotatably connected to the lower side of the bearing seat via a bearing.

[0012] The utility model proposes a crawler crane pump-controlled double winch system, which has the following beneficial effects: through the cooperation between a fixed pump, a variable pump, a hydraulic motor, a reversing valve, a rotating rod, a winding roller and a lifting rope, the fixed pump sucks the hydraulic oil from the oil tank and sends it into the hydraulic motor after pressurization; the variable pump is used to change the flow and pressure of the hydraulic oil, thereby controlling the speed of the hydraulic motor; the reversing valve realizes the forward and reverse rotation of the hydraulic motor output direction; the hydraulic motor drives the winding roller to rotate through the reversing valve, the winding roller releases the lifting rope, the lifting rope drives the support plate to descend, and then drives the hook to descend, so that the lifting hook is connected with the cargo; the reversing valve controls the winding roller to rotate in the opposite direction, the winding roller reels the lifting rope, the friction between the lifting rope and the winding roller is small, the timeliness of the damage of the lifting rope and the uncertainty of its breakage are reduced, and the safety of the winch system is improved.

[0013] Through the cooperation between the lead screw, the first gear, the second gear, the lead screw nut and the ring, when the winding roller reels the rope, the rotating rod drives the second gear to rotate, the second gear drives the first gear to rotate, the first gear drives the reciprocating lead screw to rotate, the reciprocating lead screw drives the lead screw nut to reciprocate, the lead screw nut drives the ring to move, the ring drives the rope to reciprocate left and right, and the winding roller makes the rope evenly wound around the outer wall of the winding roller, and the rope will not accumulate on one side of the outer wall of the winding roller, so that the rope is evenly wound around the outer wall of the winding roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a structural sectional view of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the connection between the support, the support plate and the reciprocating screw in the utility model;

[0017] Figure 4 It is a structural schematic diagram of the connection between the support plate, the hook and the support plate in the utility model;

[0018] Figure 5 It is a structural schematic diagram of the connection between the fixed pump, the variable pump and the hydraulic motor in the utility model;

[0019] Figure 6 It is a schematic structural diagram of the connection between the support plate, the first gear and the second gear in the utility model.

[0020] In the figure: 1, crane frame, 2, boom, 3, pump-controlled double winch mechanism, 301, fixed pump, 302, variable pump, 303, hydraulic motor, 304, reversing valve, 305, rotating rod, 306, winding roller, 307, lifting rope, 4, uniform wire arrangement mechanism, 401, reciprocating screw, 402, first gear, 403, second gear, 404, screw nut, 405, ring, 4a1, slider, 4a2, slide rod, 5, support plate, 6, bracket, 7, roller, 8, operating room, 9, walking track, 10, support plate, 11, bearing seat, 12, hook. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings:

[0022] Embodiment 1:

[0023] See attached Figure 1-6 In the present embodiment, a pump-controlled double winch system of a crawler crane comprises a crane frame 1 and a boom 2, a boom 2 is arranged above the crane frame 1, a support plate 5 is fixedly connected above the boom 2, a pump-controlled double winch mechanism 3 is arranged above the support plate 5, the pump-controlled double winch mechanism 3 controls the lifting and lowering of the hook 12, a bracket 6 is fixedly connected to the upper surface of the support plate 5, a uniform wire arrangement mechanism 4 is arranged inside the bracket 6, the uniform wire arrangement mechanism 4 realizes the uniform winding of the suspension rope 307, a drum 7 is rotatably connected to the inside of the support plate 5 through a bearing, the rolling friction between the drum 7 and the suspension rope 307 replaces the sliding friction between the suspension rope 307 and the support plate 5, an operating room 8 is fixedly connected above the crane frame 1, and walking tracks 9 are arranged on the front and rear sides of the crane frame 1.

[0024] The pump-controlled double winch mechanism 3 includes a fixed pump 301, a variable pump 302, a hydraulic motor 303, a reversing valve 304, a rotating rod 305, a winding roller 306 and a suspension rope 307. The fixed pump 301 is fixedly connected to the upper surface of the support plate 5. The model of the fixed pump 301 is PV1801L1TNFWS. The output end of the fixed pump 301 is fixedly connected to the variable pump 302. The model of the variable pressure pump 302 is A7V78. The output end of the variable pump 302 is fixedly connected to the hydraulic motor 303. The variable pressure pump 302 drives the hydraulic motor 303 to start. The variable pump 302 and the hydraulic motor 303 are both fixedly connected to the upper surface of the support plate 5. The two output ends of the hydraulic motor 303 are both fixedly connected to the reversing valve 304. The reversing valve 304 allows the conveying direction of the hydraulic motor 303 to be reversed and adjusted.

[0025] Pump-controlled hydraulic lifting mechanism is a common hydraulic transmission mechanism, which is mainly composed of a fixed pump, a variable pump, a hydraulic motor, a reversing valve, etc. When working, the direction and speed of the hydraulic motor are controlled by changing the working of the variable pump, thereby realizing the control of the lifting mechanism. Specifically, the hydraulic pump sucks the hydraulic oil from the oil tank, pressurizes it and sends it to the hydraulic motor. The variable pump is used to change the flow and pressure of the hydraulic oil, thereby controlling the direction and speed of the hydraulic motor. The hydraulic motor drives the various components of the crane to perform lifting, retracting, etc. according to different input signals;

[0026] The reversing valve 304 is fixedly connected to the outer wall of the bracket 6, and the output end of the reversing valve 304 is fixedly connected to the rotating rod 305. The reversing valve 304 drives the rotating rod 305 to rotate. The outer walls of both ends of the rotating rod 305 are rotatably connected to the bracket 6 through bearings. A winding roller 306 is fixedly connected to the outer wall of the rotating rod 305. The rotating rod 305 drives the winding roller 306 to rotate. A suspension rope 307 is wound around the outer wall of the winding roller 306. The winding roller 306 retracts and releases the suspension rope 307. The end of the suspension rope 307 is fixedly connected to a support plate 10. The suspension rope 307 drives the support plate 10 to move. A bearing seat 11 is fixedly connected to the lower part of the support plate 10. The support plate 10 drives the bearing seat 11 to move. The lower part of the bearing seat 11 is rotatably connected to a suspension hook 12 through a bearing. The direction of the suspension ring 12 can be rotated.

[0027] The fixed pump 301 sucks the hydraulic oil from the oil tank and sends it to the hydraulic motor 303 after pressurization. The variable pump 302 is used to change the flow and pressure of the hydraulic oil, thereby controlling the speed of the hydraulic motor 303. The reversing valve 304 realizes the forward and reverse rotation of the output direction of the hydraulic motor 303. The hydraulic motor 303 drives the winding roller 306 to rotate through the reversing valve 304. The winding roller 306 releases the lifting rope 307. The lifting rope 307 drives the support plate 10 to descend, and then drives the hook 12 to descend, so that the hook 12 is connected to the cargo. The reversing valve 304 controls the winding roller 306 to rotate in the opposite direction. The winding roller 306 reels the lifting rope 307. The friction between the lifting rope 307 and the winding roller 306 is small, which reduces the timeliness of the damage of the lifting rope 307 and the uncertainty of its breakage, thereby improving the safety of the winch system.

[0028] The uniform wire arrangement mechanism 4 includes a reciprocating screw 401, a first gear 402, a second gear 403, a screw nut 404 and a collar 405. The outer walls of both ends of the reciprocating screw 401 are rotatably connected to the bracket 6 through bearings. The end of the reciprocating screw 401 is fixedly connected with the first gear 402, the first gear 402 drives the reciprocating screw 401 to rotate, the first gear 402 is meshed and connected with the second gear 403, and the second gear 403 drives the first gear 402 to rotate;

[0029] The second gear 403 is fixedly connected to the end of the rotating rod 305, and the rotating rod 305 drives the second gear 403 to rotate. The outer wall of the reciprocating screw 401 is threadedly connected with a screw nut 404, and the reciprocating screw 401 drives the screw nut 404 to move. The outer wall of the screw nut 404 is fixedly connected with a collar 405, and the reciprocating screw 404 drives the collar 405 to move, and the suspension rope 405 passes through the collar 405;

[0030] When the winding roller 306 is winding the suspension rope 307, the rotating rod 305 drives the second gear 403 to rotate, the second gear 403 drives the first gear 402 to rotate, the first gear 402 drives the reciprocating screw 401 to rotate, the reciprocating screw 401 drives the screw nut 404 to reciprocate, the screw nut 404 drives the ring 405 to move, the ring 405 drives the suspension rope 307 to reciprocate left and right, the winding roller 306 makes the suspension rope 307 evenly wound around the outer wall of the winding roller 306, the suspension rope 307 will not accumulate on one side of the outer wall of the winding roller 306, so that the suspension rope 307 is evenly wound around the outer wall of the winding roller 306.

[0031] Working principle:

[0032] When the cargo is hoisted by using the crawler crane pump-controlled double winch system, the traveling crawler 9 facilitates the crane to move to the designated position, and the operation room 8 controls the crane;

[0033] Pump-controlled double winch mechanism startup phase:

[0034] The direction and speed of the hydraulic motor 303 are controlled by changing the operation of the variable pump 302, thereby realizing the control of the lifting mechanism. Specifically, the fixed pump 301 sucks the hydraulic oil from the oil tank, and sends it into the hydraulic motor 303 after pressurization. The variable pump 302 is used to change the flow and pressure of the hydraulic oil, thereby controlling the speed of the hydraulic motor 303. The reversing valve 304 realizes the forward and reverse rotation of the output direction of the hydraulic motor 303. The hydraulic motor 303 drives the winding roller 306 to rotate through the reversing valve 304. The winding roller 306 releases the lifting rope 307. The lifting rope 307 drives the support plate 10 to descend, and then drives the hook 12 to descend, so that the hook 12 is connected with the cargo. The reversing valve 304 controls the winding roller 306 to rotate in the opposite direction. The winding roller 306 reels the lifting rope 307, and the cargo is lifted. The friction between the lifting rope 307 and the winding roller 306 is small, which reduces the timeliness of the damage of the lifting rope 307 and the uncertainty of its breakage, thereby improving the safety of the hoisting system.

[0035] Evenly winding stage of the sling:

[0036] When the winding roller 306 is winding the suspension rope 307, the rotating rod 305 drives the second gear 403 to rotate, the second gear 403 drives the first gear 402 to rotate, the first gear 402 drives the reciprocating screw 401 to rotate, the reciprocating screw 401 drives the screw nut 404 to reciprocate, the screw nut 404 drives the ring 405 to move, the ring 405 drives the suspension rope 307 to reciprocate left and right, the winding roller 306 makes the suspension rope 307 evenly wound around the outer wall of the winding roller 306, the suspension rope 307 will not accumulate on one side of the outer wall of the winding roller 306, so that the suspension rope 307 is evenly wound around the outer wall of the winding roller 306.

[0037] Embodiment 2:

[0038] See attached Figure 1-6 : In this embodiment, a crawler crane pump-controlled double winch system, the uniform wire arrangement mechanism 4 also includes a slider 4a1 and a slide bar 4a2, the slider 4a1 is fixedly connected to the bottom of the screw nut 404, the screw nut 404 drives the slider 4a1 to move, the screw nut 404 is slidably connected to the outer wall of the slide bar 4a2, the slider 4a1 slides on the outer wall of the slide bar 4a2, and both ends of the slide bar 4a2 are fixedly connected to the bracket 6;

[0039] Through the cooperation between the slider 4a1 and the slide rod 4a2, the lead screw nut 404 drives the slider 4a1 to move when it moves, and the slider 4a1 slides on the outer wall of the slide rod 4a2. The slider 4a1 and the slide rod 4a2 guide the movement of the lead screw nut 404.

[0040] Working principle:

[0041] When the lead screw nut 404 moves, it drives the slider 4a1 to move. The slider 4a1 slides on the outer wall of the slide rod 4a2. The slider 4a1 and the slide rod 4a2 guide the movement of the lead screw nut 404.

[0042] Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A crawler crane pump-controlled double winch system, comprising a crane frame (1) and a boom (2), wherein the boom (2) is arranged above the crane frame (1), and characterized in that: A support plate (5) is fixedly connected above the boom (2), a pump-controlled double winch mechanism (3) is arranged above the support plate (5), a bracket (6) is fixedly connected to the upper surface of the support plate (5), a uniform wire arrangement mechanism (4) is arranged inside the bracket (6), a roller (7) is rotatably connected to the inside of the support plate (5) via a bearing, and an operating room (8) is fixedly connected above the crane frame (1).

2. A crawler crane pump-controlled double winch system according to claim 1, characterized in that: The pump-controlled double winch mechanism (3) comprises a fixed pump (301), the fixed pump (301) is fixedly connected to the upper surface of the support plate (5), the output end of the fixed pump (301) is fixedly connected to a variable pump (302), the output end of the variable pump (302) is fixedly connected to a hydraulic motor (303), the variable pump (302) and the hydraulic motor (303) are both fixedly connected to the upper surface of the support plate (5), the two output ends of the hydraulic motor (303) are both fixedly connected to a reversing valve (304), the reversing valve (304) is fixedly connected to the outer wall of the bracket (6), the output end of the reversing valve (304) is fixedly connected to a rotating rod (305), the outer walls at both ends of the rotating rod (305) are rotatably connected to the bracket (6) via bearings, the outer wall of the rotating rod (305) is fixedly connected to a winding roller (306), and the outer wall of the winding roller (306) is wound with a suspension rope (307).

3. A crawler crane pump-controlled double winch system according to claim 1, characterized in that: The uniform wire arrangement mechanism (4) comprises a reciprocating screw (401), the outer walls of both ends of the reciprocating screw (401) are rotatably connected to the bracket (6) via bearings, a first gear (402) is fixedly connected to the end of the reciprocating screw (401), the first gear (402) is meshingly connected to a second gear (403), the second gear (403) is fixedly connected to the end of a rotating rod (305), the outer wall of the reciprocating screw (401) is threadedly connected to a screw nut (404), and the outer wall of the screw nut (404) is fixedly connected to a collar (405).

4. A crawler crane pump-controlled double winch system according to claim 1, characterized in that: Walking crawlers (9) are provided on both the front and rear sides of the crane frame (1).

5. The crawler crane pump-controlled double winch system according to claim 2, characterized in that: The end of the suspension rope (307) is fixedly connected to a support plate (10), and the lower part of the support plate (10) is fixedly connected to a bearing seat (11).

6. A crawler crane pump-controlled double winch system according to claim 5, characterized in that: A hook (12) is rotatably connected to the lower portion of the bearing seat (11) via a bearing.

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