A kind of based on hoisting machinery equipment limiting device

Abstract

This invention discloses a limiting device for lifting machinery, relating to the field of lifting machinery technology. It includes a mounting frame, with winding rollers for winding ropes arranged between the mounting frames. The winding rollers are fixedly connected to the output end of a first motor. A guide wheel for threading the rope is arranged on one side of the winding rollers. The guide wheel is rotatably arranged between U-shaped frames, and a pressure wheel is also rotatably arranged on the guide wheel, forming a reserved gap between the pressure wheel and the guide wheel for threading the rope. The U-shaped frame is connected to a drive mechanism that drives it to move horizontally along the axial direction of the winding roller. During rotation, the winding roller winds the rope around it. After the rope has wound multiple turns at a certain point on the surface of the winding roller, the drive mechanism drives the U-shaped frame to move a preset distance along the axial direction of the winding roller, ensuring the rope is fully wound around the winding roller and preventing rope accumulation.

Description

Technical Field

[0001] This invention relates to the field of lifting machinery technology, and specifically to a limiting device for lifting machinery equipment. Background Technology

[0002] Cranes, as multi-action lifting machinery that can vertically lift and horizontally move heavy objects within a certain range, are widely used in production sites such as ports, ships, and construction sites. Cranes are usually equipped with hoisting mechanisms, luffing mechanisms, and slewing mechanisms to control various actions. Cranes are equipped with crane limit devices, which are safety protection devices used to limit the operation of each mechanism. When each mechanism moves to its limit position, the limit device sends a signal and automatically stops the corresponding action to avoid continuing to operate when the limit position is reached, which could cause irreversible safety accidents such as mechanical collisions, falling heavy objects, or personal injury.

[0003] In the prior art, such as the patent document with announcement number CN110371872A, a crane limiting device is disclosed, which also discloses a support frame fixed on the crane and a fixed pulley rotatably connected to the support frame. The support frame is provided with a limiting mechanism located below the fixed pulley. The limiting mechanism includes an outer sleeve rotatably connected to the support frame, an inner sleeve inside the outer sleeve, and a flexible layer that is tightly attached to the wire rope on the inner wall of the inner sleeve.

[0004] While existing technology can confine the rope to a fixed pulley, during the winding or unwinding process, the axial length of the winding roller makes it easy for the rope to bunch up when it passes through the fixed pulley and winds onto the winding roller, making it impossible to fully cover the winding roller along the axial direction. Summary of the Invention

[0005] The purpose of this invention is to provide a limiting device for lifting machinery and equipment, and to solve the following technical problems:

[0006] During the winding or unwinding of rope, because the winding roller has a certain axial length, the rope is prone to bunching when it passes through the fixed pulley and winds onto the winding roller, making it impossible to fully cover the winding roller along the axial direction.

[0007] The objective of this invention can be achieved through the following technical solutions:

[0008] A limit device for lifting machinery includes a mounting frame, with winding rollers for winding ropes arranged between the mounting frames, and the winding rollers are fixedly connected to the output end of a first motor.

[0009] One side of the winding roller is provided with guide wheels for inserting ropes;

[0010] The guide wheel is rotatably arranged between the U-shaped frames, and a pressure wheel is also rotatably arranged on the guide wheel. A reserved gap is formed between the pressure wheel and the guide wheel for inserting the rope.

[0011] The U-shaped frame is connected to a drive mechanism that drives it to move horizontally along the axial direction of the winding roller.

[0012] Preferably, the U-shaped frame has grooves on both sides, and the pressure roller has pins fixedly arranged at both ends, which are slidably embedded in the grooves, with the ends of the pins rotatably connected to the adjusting seat;

[0013] The U-shaped frame has two ends with first telescopic cylinders arranged opposite each other. The end of the first telescopic cylinder is fixed to the adjustment seat, and a spring mechanism connected to the telescopic rod is provided in the first telescopic cylinder.

[0014] Preferably, the drive mechanism includes a screw arranged on the winding roller, the end of the screw being fixed to the output end of the second motor, and a nut being helically sleeved on the screw, the nut being fixed to the U-shaped frame by an L-shaped bracket.

[0015] Preferably, one end of the winding roller is fixedly connected to a turntable, and an arc-shaped speed reduction plate is provided on one side of the turntable. The arc-shaped speed reduction plate is connected to a lifting mechanism that drives it to move toward or away from the turntable.

[0016] Preferably, a second telescopic cylinder is fixedly arranged on the arc-shaped speed reduction plate, and the second telescopic cylinder is fixed to the first rack;

[0017] The second telescopic cylinder is equipped with a first spring.

[0018] Preferably, the lifting mechanism includes a support rod fixedly arranged on an L-shaped bracket, the end of the support rod being fixed to a mounting base, and a roller that rotates and fits against the rolling motion of the rope being arranged inside the mounting base;

[0019] The mounting frame has a support plate fixedly installed on one side, and a first guide rod is provided on one side of the support plate.

[0020] Preferably, the lifting mechanism further includes a second rack, which is slidably arranged on the first guide rod. A second spring is provided on the first guide rod, and a gear is also provided on the support plate. One side of the gear meshes with the first rack, and the other side meshes with the second rack. The first rack and the second rack are arranged in parallel and staggered. A third guide rod fixed to the L-shaped bracket is slidably arranged between the second racks.

[0021] The beneficial effects of this invention are:

[0022] (1) The present invention conveys the rope on the winding roller by interlacing it in the reserved gap between the guide wheel and the pressure wheel, so that even if the rope swings, it will always be embedded in the reserved gap under the pressure of the pressure wheel, thus making it more stable.

[0023] (2) The present invention drives the winding roller to rotate by starting the first motor. During the rotation of the winding roller, the rope is wound around the winding roller. When the rope is wound around the winding roller multiple times at a certain point on the surface of the winding roller, the driving mechanism drives the U-shaped frame to move a preset distance along the axial direction of the winding roller, so that the rope can be fully wound around the winding roller and avoid the phenomenon of rope winding and gathering. Attached Figure Description

[0024] The invention will now be further described with reference to the accompanying drawings.

[0025] Figure 1 This is a schematic diagram of the structure of a limiting device for lifting machinery equipment according to the present invention. Figure 1 ;

[0026] Figure 2 This is a schematic diagram of the structure of a limiting device for lifting machinery equipment according to the present invention. Figure 2 ;

[0027] Figure 3 This is a schematic diagram of the structure of a limiting device for lifting machinery equipment according to the present invention. Figure 3 ;

[0028] Figure 4 This is a schematic diagram of the structure of a limiting device for lifting machinery equipment according to the present invention. Figure 4 ;

[0029] Figure 5 This is the present invention. Figure 1 Enlarged structural diagram at point A in the middle.

[0030] In the diagram: 1. Mounting frame; 2. Winding roller; 3. Guide wheel; 4. Rope; 5. Roller; 6. Screw; 7. Second rack; 101. Support plate; 201. First motor; 301. L-shaped bracket; 302. Third guide rod; 303. Slide groove; 304. Pin; 305. Adjusting seat; 306. First telescopic cylinder; 307. Pressure roller; 308. U-shaped frame; 501. Mounting seat; 502. Support rod; 601. Nut; 602. Second motor; 701. Gear; 702. First guide rod; 703. Second spring; 704. First rack; 705. Second telescopic cylinder; 706. First spring; 707. Arc-shaped speed reducer; 708. Turntable. Detailed Implementation

[0031] 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.

[0032] Example 1

[0033] Please see Figures 1-2 As shown, the present invention is a limiting device based on lifting machinery equipment, including a mounting frame 1, and winding rollers 2 for winding rope 4 are arranged between the mounting frames. The winding rollers 2 are fixedly connected to the output end of the first motor 201. In one embodiment of this invention, the mounting frame 1 is configured as a U-shaped structure.

[0034] A guide wheel 3 for threading the rope 4 is arranged on one side of the winding roller 2. The guide wheel 3 is rotatably arranged between the U-shaped frames 308. A pressure wheel 307 is also rotatably arranged on the guide wheel 3. A reserved gap for threading the rope 4 is formed between the pressure wheel 307 and the guide wheel 3. Specifically, in actual application, the rope 4 on the winding roller 2 is threaded and arranged in the reserved gap between the guide wheel 3 and the pressure wheel 307 for conveying. Even if the rope 4 swings, it will always be embedded in the reserved gap under the pressure of the pressure wheel 307, so that the stability is higher.

[0035] The U-shaped frame 308 is connected to a drive mechanism that drives it to move horizontally along the axial direction of the winding roller 2. It can be explained that when the crane lifts a heavy object, it first starts the first motor 201 to drive the winding roller 2 to rotate. During the rotation of the winding roller 2, the rope 4 is wound around the winding roller 2. When the rope 4 is wound multiple times on a certain part of the surface of the winding roller 2, the drive mechanism drives the U-shaped frame 308 to move a preset distance along the axial direction of the winding roller 2, so that the rope 4 can be fully wound around the winding roller 2, avoiding the phenomenon of the rope 4 being wound and gathered.

[0036] Example 2

[0037] Based on Example 1, please refer to Figure 4 The U-shaped frame 308 has sliding grooves 303 on both sides. The pressure roller 307 has pins 304 fixedly arranged at both ends and slidably embedded in the sliding grooves 303. The ends of the pins 304 are rotatably connected to the adjusting seat 305. The two ends of the U-shaped frame 308 are arranged opposite each other with first telescopic cylinders 306. The ends of the first telescopic cylinders 306 are fixed to the adjusting seat 305. A spring mechanism connected to the telescopic rod is provided in the first telescopic cylinders 306. It can be noted that, in this embodiment, by arranging the first telescopic cylinders 306 and the spring mechanism, the pressure roller 307 can be raised and lowered based on the thickness of the rope 4 to adjust the reserved gap height. At the same time, the spring mechanism can give the pressure roller 307 a clamping force moving towards the rope 4, further improving the stability of the rope 4 moving on the guide wheel 3 and avoiding the phenomenon of the rope 4 detaching.

[0038] As a further embodiment, the driving mechanism includes a screw 6 disposed on the winding roller 2. The end of the screw 6 is fixed to the output end of the second motor 602. A nut 601 is screwed onto the screw 6. The nut 601 is fixed to the U-shaped frame 308 through the L-shaped bracket 301. It can be explained that when adjusting the position of the guide wheel 3, the second motor 602 is started to drive the screw 6 to rotate. When the nut 601 is moved on the screw 6, it is moved by the U-shaped frame 308 through the L-shaped bracket 301.

[0039] In this embodiment, the second motor 602 is vertically mounted on the mounting frame 1 and connected to a set of telescopic rods;

[0040] When the output power of the first motor 201 is constant, when the rope 4 is wound on the surface of the winding roller 2, as the diameter of the winding disc increases, if the rotation speed of the winding roller 2 is kept constant, the lifting speed of the rope 4 will gradually increase when it is lifted at noon. If the speed is too fast, the lifting will be unstable.

[0041] In this embodiment, one end of the winding roller 2 is fixedly connected to the turntable 708, and an arc-shaped speed reduction plate 707 is provided on one side of the turntable 708. The arc-shaped speed reduction plate 707 is connected to a lifting mechanism that drives it to move toward or away from the turntable 708. It can be explained that when it is necessary to reduce the speed of the winding roller 2, the lifting mechanism drives the arc-shaped speed reduction plate 707 to fit against the turntable 708, and the speed of the turntable 708 is limited by adjusting the pressing force between the arc-shaped speed reduction plate 707 and the turntable 708.

[0042] A second telescopic cylinder 705 is fixedly mounted on the arc-shaped speed reducer 707. The second telescopic cylinder 705 is fixed to the first rack 704. The second telescopic cylinder 705 is equipped with a first spring 706. It can be explained that the first rack 704 is first moved by the lifting mechanism. The first rack 704 drives the arc-shaped speed reducer 707 to contact or separate from the turntable 708 through the second telescopic cylinder 705. During this process, when the arc-shaped speed reducer 707 initially contacts the turntable 708, the clamping force after the initial contact is not large because the first spring 706 is provided on the second telescopic cylinder 705. Therefore, the clamping force can be gradually increased by continuously driving the first rack 704 towards the turntable 708 through the lifting mechanism, thereby simultaneously reducing the rotation speed of the winding roller 2 and achieving the effect of linear adjustment.

[0043] Please see Figure 5The lifting mechanism includes a support rod 502 fixedly mounted on an L-shaped bracket 301. The end of the support rod 502 is fixed to a mounting base 501. A roller 5 that rolls and contacts the rope 4 is rotatably mounted inside the mounting base 501. A support plate 101 is fixedly mounted on one side of the mounting frame 1. A first guide rod 702 is provided on one side of the support plate 101. The lifting mechanism also includes a second rack 7, which is slidably mounted on the first guide rod 702. A second spring 703 is provided on the first guide rod 702. A gear 701 is also provided on the support plate 101. One side of the gear 701 meshes with the first rack 704, and the other side meshes with the second rack 7. The first rack 704 and the second rack 7 are arranged in parallel and staggered. A third guide rod 302 fixed to the L-shaped bracket 301 is slidably mounted between the second racks 7.

[0044] It can be explained that as the rope 4 is wound around the winding roller 2, the roller 5 is pushed to rise as the disc diameter increases. The roller 5 drives the second rack 7 to rise through the mounting base 501, the L-shaped bracket 301 and the third guide rod 302. The second rack 7 then drives the gear 701 to rotate. The gear 701 then drives the first rack 704 to descend, so as to drive the arc-shaped speed reducer 707 to move towards the turntable 708.

[0045] The working principle of this invention is as follows: When the crane lifts a heavy object, it first starts the first motor 201 to drive the winding roller 2 to rotate. During the rotation of the winding roller 2, the rope 4 is wound around the winding roller 2. When the rope 4 is wound multiple times on a certain part of the surface of the winding roller 2, the drive mechanism drives the U-shaped frame 308 to move a preset distance along the axial direction of the winding roller 2, so that the rope 4 can be fully wound around the winding roller 2. As the rope 4 is wound around the winding roller 2, the diameter of the disc increases, pushing the roller 5 to rise. The roller 5 drives the second rack 7 to rise through the mounting base 501, the L-shaped bracket 301 and the third guide rod 302. The second rack 7 then drives the gear 701 to rotate. The gear 701 then drives the first rack 704 to descend, so as to drive the arc-shaped speed reducer 707 to move towards the turntable 708. The rotation speed of the turntable 708 is limited by adjusting the clamping force between the arc-shaped speed reducer 707 and the turntable 708.

[0046] In the description of this invention, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on the invention. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "multiple" means two or more.

[0047] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0048] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A limit device based on lifting machinery equipment, comprising a mounting frame (1), and winding rollers (2) for winding ropes (4) are arranged between the mounting frames, the winding rollers (2) being fixedly connected to the output end of a first motor (201); Its features are, A guide wheel (3) for inserting the rope (4) is arranged on one side of the winding roller (2). Among them, the guide wheel (3) is rotatably arranged between the U-shaped frame (308), and the pressure wheel (307) is also rotatably arranged on the guide wheel (3), and a reserved gap for inserting the rope (4) is formed between the pressure wheel (307) and the guide wheel (3); The U-shaped frame (308) is connected to a drive mechanism that drives it to move horizontally along the axial direction of the winding roller (2); The U-shaped frame (308) has sliding grooves (303) on both sides, and the pressure roller (307) has pins (304) that are slidably embedded in the sliding grooves (303) fixed at both ends. The ends of the pins (304) are rotatably connected to the adjusting seat (305). The U-shaped frame (308) has two ends with first telescopic cylinders (306) arranged opposite each other. The end of the first telescopic cylinder (306) is fixed to the adjusting seat (305). A spring mechanism connected to the telescopic rod is provided in the first telescopic cylinder (306). One end of the winding roller (2) is fixedly connected to the turntable (708). An arc-shaped deceleration plate (707) is arranged on one side of the turntable (708). The arc-shaped deceleration plate (707) is connected to a lifting mechanism that drives it to move towards or away from the turntable (708). A second telescopic cylinder (705) is fixedly arranged on the arc-shaped speed reduction plate (707), and the second telescopic cylinder (705) is fixed to the first rack (704); a first spring (706) is provided on the second telescopic cylinder (705). The lifting mechanism includes a support rod (502) fixedly mounted on an L-shaped bracket (301), the end of the support rod (502) being fixed to a mounting base (501), and a roller (5) rotatably mounted inside the mounting base (501) to roll and fit against the rope (4); a support plate (101) is fixedly mounted on one side of the mounting frame (1), and a first guide rod (702) is provided on one side of the support plate (101).

2. The limit device for lifting machinery and equipment according to claim 1, characterized in that, The driving mechanism includes a screw (6) arranged on the winding roller (2), the end of the screw (6) is fixed to the output end of the second motor (602), and a nut (601) is spirally sleeved on the screw (6). The nut (601) is fixed to the U-shaped frame (308) by an L-shaped bracket (301).

3. A limit device for lifting machinery and equipment according to claim 1, characterized in that, The lifting mechanism also includes a second rack (7), which is slidably arranged on the first guide rod (702). The first guide rod (702) is provided with a second spring (703), and the support plate (101) is also provided with a gear (701). One side of the gear (701) meshes with the first rack (704), and the other side meshes with the second rack (7). The first rack (704) and the second rack (7) are arranged in parallel and staggered. A third guide rod (302) fixed to the L-shaped bracket (301) is slidably arranged between the second racks (7).

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