Lifting structure for crane roller
By designing extension components and positioning planes on the crane drum and using centrifugal force to limit the rotation of the rotating shaft, the problem of rapid falling objects caused by mechanical failure is solved, and safety locking is achieved to prevent accidents.
Patent Information
- Application Number
- CN202422759144.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-13
- Publication Date
- 2025-09-16
- Estimated Expiration
- 2034-11-13
AI Technical Summary
When a mechanical failure occurs in the crane drum, the rope loosens quickly, causing the object to fall rapidly, posing a safety hazard.
A lifting structure was designed, including a mounting frame, a rotating shaft, a reel, an extension assembly and a fixed shell. Centrifugal force was used to trigger the extension bar to enter the extension slot, and the rotation of the rotating shaft was restricted by the positioning plane to prevent the object from falling.
In case of mechanical failure, the object's position can be quickly locked to prevent it from falling and ensure safety.
Smart Images
Figure CN223342285U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of crane drums, and more particularly to a lifting structure for crane drums. Background Art
[0002] A crane drum is a mechanical device specifically used for winding and storing ropes. It is widely used in construction machinery such as loaders, tower cranes, and cranes. Its main function is to smoothly release and reel in the rope during the operation of the crane, thereby achieving the lifting and lowering of objects.
[0003] When some mechanical failure occurs, the motor will lose control of the crane drum. At this time, the rope wrapped around the drum will quickly loosen from the drum surface, and the object pulled by the rope will fall rapidly under the action of its own gravity, causing danger. Utility Model Content
[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a lifting structure for a crane drum to solve the problems existing in the above-mentioned background technology.
[0005] The utility model provides the following technical solution: a lifting structure for a crane drum, comprising a mounting frame, a rotating shaft rotatably mounted on the mounting frame, a drum fixedly mounted on the surface of the rotating shaft, a traction rope wound around the surface of the drum, one end of the traction rope is fixedly connected to the surface of the drum, a fixed shell is fixedly mounted on one side of the mounting frame, one end of the rotating shaft passes through the fixed shell and extends outward, a rotating plate is provided inside the fixed shell, the rotating plate is fixedly mounted on the surface of the rotating shaft, and an extension component is installed on one side of the rotating plate.
[0006] The extension assembly includes a fixed shaft, an extension bar and a receiving block. The fixed shaft and the receiving block are fixedly installed on one side of the rotating plate. One end of the extension bar is rotatably installed on the surface of the fixed shaft. A built-in groove is opened on the receiving block, and a motion rod and a sliding block are arranged inside the built-in groove.
[0007] Preferably, an extension groove is provided on the inner wall of the fixed shell, and the extension groove array is provided with three, and the extension component is provided with three corresponding extension groove arrays. The extension groove wall is provided with a first positioning plane, and the other end of the extension strip is provided with a second positioning plane, and the first positioning plane matches the second positioning plane.
[0008] Preferably, a guide hole is formed through the stretch bar, a guide post is provided in the guide hole, and one end of the guide post is fixedly connected to one side of the rotating plate.
[0009] Preferably, a trigger arc surface is provided at one end of the motion rod, the other end of the motion rod passes through the built-in groove wall, and the other end of the motion rod is fixedly connected to the stretch bar, and a trigger plane is provided on one side of the sliding block, and the trigger arc surface matches the trigger plane.
[0010] Preferably, the built-in groove wall is fixedly connected to a fixed block, a sliding rod is provided on the fixed block, one end of the sliding rod is fixedly connected to the surface of the fixed block, the other end of the sliding rod is fixedly connected to the limiting block, the sliding block is sleeved on the surface of the sliding rod, and a compression spring is sleeved on the surface of the sliding rod, one end of the compression spring is fixedly connected to the side of the sliding block away from the limiting block, and the other end of the compression spring is fixedly connected to the side of the fixed block toward the sliding block.
[0011] The technical effects and advantages of this utility model are:
[0012] When a mechanical failure occurs and the motor loses control of the rotating shaft, the object falls rapidly, and the rotating shaft also rotates rapidly around its own axis. The stretch bar and the motion rod rotate around the fixed axis under the action of centrifugal force, and the trigger arc surface slides along the trigger plane and squeezes the sliding block. The sliding block slides along the sliding rod, and the stretch bar enters the extension groove. The second positioning plane and the first positioning plane conflict with each other, making it impossible for the rotating shaft to continue to rotate. The utility model can quickly lock the position of the object and prevent the object from falling and causing danger when a failure occurs. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0014] Figure 2 This is a schematic diagram of the internal structure of the fixed shell of the present utility model.
[0015] Figure 3 This is a schematic diagram of the internal structure of the fixed shell of the present utility model.
[0016] Figure 4 This is a schematic structural diagram of the rotating plate and extension assembly of the utility model.
[0017] Figure 5 For this utility model Figure 3 A magnified view of the structure in Figure 2.
[0018] The accompanying drawings are marked as follows: 1. Mounting frame; 2. Rotating shaft; 3. Reel; 4. Pull rope; 5. Fixed shell; 51. Extension slot; 511. First positioning plane; 6. Rotating plate; 7. Extension assembly; 71. Fixed shaft; 72. Extension bar; 721. Guide hole; 722. Guide column; 723. Second positioning plane; 73. Receiving block; 731. Built-in slot; 74. Moving rod; 741. Trigger arc surface; 75. Sliding block; 751. Trigger plane; 76. Fixed block; 77. Sliding rod; 771. Limit block; 78. Compression spring. DETAILED DESCRIPTION
[0019] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are merely examples. The lifting structure for a crane drum involved in the present invention is not limited to the various structures recorded in the following embodiments. All other implementations obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.
[0020] The utility model provides a lifting structure for a crane drum, including a mounting frame 1, a rotating shaft 2 is rotatably mounted on the mounting frame 1, a drum 3 is fixedly mounted on the surface of the rotating shaft 2, a traction rope 4 is wound around the surface of the drum 3, one end of the traction rope 4 is fixedly connected to the surface of the drum 3, a fixed shell 5 is fixedly mounted on one side of the mounting frame 1, one end of the rotating shaft 2 passes through the fixed shell 5 and extends outward, a rotating plate 6 is provided inside the fixed shell 5, the rotating plate 6 is fixedly mounted on the surface of the rotating shaft 2, and an extension component 7 is installed on one side of the rotating plate 6.
[0021] The extension assembly 7 includes a fixed shaft 71, an extension bar 72 and a receiving block 73. The fixed shaft 71 and the receiving block 73 are both fixedly mounted on one side of the rotating plate 6. One end of the extension bar 72 is rotatably mounted on the surface of the fixed shaft 71. A built-in groove 731 is provided on the receiving block 73, and a moving rod 74 and a sliding block 75 are arranged inside the built-in groove 731.
[0022] Furthermore, an extension groove 51 is provided on the inner wall of the fixed shell 5, and three extension grooves 51 are arranged in an array. Three extension grooves 51 are arranged in an array corresponding to the extension component 7. A first positioning plane 511 is provided on the wall of the extension groove 51, and a second positioning plane 723 is provided on the other end of the extension bar 72. The first positioning plane 511 matches the second positioning plane 723. When the first positioning plane 511 and the second positioning plane 723 conflict with each other, the rotation of the rotating shaft 2 and the rotating plate 6 as a whole around the axis of the rotating shaft 2 can be restricted.
[0023] Furthermore, a guide hole 721 is formed through the stretch bar 72, and a guide column 722 is provided in the guide hole 721. One end of the guide column 722 is fixedly connected to one side of the rotating plate 6. When the stretch bar 72 rotates around the axis of the fixed shaft 71, the guide column 722 can slide along the guide hole 721, thereby improving the stability of the movement of the stretch bar 72.
[0024] Furthermore, a trigger arc surface 741 is provided at one end of the motion rod 74, and the other end of the motion rod 74 passes through the wall of the built-in groove 731, and the other end of the motion rod 74 is fixedly connected to the stretch bar 72, and a trigger plane 751 is provided on one side of the sliding block 75, and the trigger arc surface 741 matches the trigger plane 751. When the trigger arc surface 741 slides along the trigger plane 751, the motion rod 74 can squeeze the sliding block 75, and the wall of the built-in groove 731 is fixedly connected to the fixed block 76. A sliding rod 77 is provided on the fixed block 76, and one end of the sliding rod 77 is connected to the fixed block 731. 6 surface, the other end of the sliding rod 77 is fixedly connected to the limit block 771, the sliding block 75 is sleeved on the surface of the sliding rod 77, the sliding block 75 and the sliding rod 77 form a sliding guide along the axis of the sliding rod 77, and a compression spring 78 is sleeved on the surface of the sliding rod 77. One end of the compression spring 78 is fixedly connected to the side of the sliding block 75 away from the limit block 771, and the other end of the compression spring 78 is fixedly connected to the side of the fixed block 76 toward the sliding block 75. The elastic force of the compression spring 78 can drive the sliding block 75 to move in the direction close to the limit block 771.
[0025] The working principle of the present utility model is as follows: Under normal circumstances, the motor pulls the rotating shaft 2 to rotate around its own axis through the transmission mechanism, and the rotating shaft 2 rotates and drives the reel 3 to rotate synchronously around the axis of the rotating shaft 2. When the reel 3 rotates forward, the traction rope 4 is loosened from the surface of the reel 3, thereby realizing the descent of the object. When the reel 3 reverses, the traction rope 4 is wound around the surface of the reel 3, thereby realizing the lifting of the object. During this process, the rotating shaft 2 rotates slowly and at a uniform speed, and the rotating shaft 2 rotates and drives the rotating plate 6 and the extension component 7 to rotate synchronously around the axis of the rotating shaft 2 as a whole. The extension bar 72 is always in contact with the receiving block 73, and the extension bar 72 is separated from the extension slot 51.
[0026] When a mechanical failure occurs and the motor loses control of the rotating shaft 2, the object falls rapidly. Under the action of the object's gravity, the rotating shaft 2 also rotates rapidly around its own axis. At this time, the acceleration is large, and the stretching bar 72 is affected by the centrifugal force and rotates around the axis of the fixed shaft 71 in the direction away from the center of the rotating plate 6. The stretching bar 72 moves and drives the moving rod 74 to rotate synchronously around the axis of the fixed shaft 71. The triggering arc surface 741 slides along the triggering plane 751 and squeezes the sliding block 75. The sliding block 75 moves along the sliding rod 77 in the direction away from the limit block 771. The compression spring 78 contracts under the squeezing of the sliding block 75. At this time, the stretching bar 72 enters the extension groove 51, and then the second positioning plane 723 and the first positioning plane 511 conflict with each other, so that the rotating shaft 2 can no longer rotate and the object stops falling.
[0027] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense, and may refer to mechanical or electrical connections, internal communication between two components, or direct connection. "Up," "down," "left," and "right" are only used to indicate relative positional relationships. When the absolute positions of the objects being described change, the relative positional relationships may also change.
[0028] Secondly: The drawings of the embodiments disclosed in this utility model only involve structures related to the embodiments disclosed in this utility model. Other structures can refer to common designs. In the absence of conflicts, the same embodiment and different embodiments of the utility model can be combined with each other.
[0029] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A lifting structure for a crane drum, comprising a mounting frame (1), characterized in that: A rotating shaft (2) is rotatably mounted on the mounting frame (1), a reel (3) is fixedly mounted on the surface of the rotating shaft (2), a traction rope (4) is wound around the surface of the reel (3), one end of the traction rope (4) is fixedly connected to the surface of the reel (3), a fixed shell (5) is fixedly mounted on one side of the mounting frame (1), one end of the rotating shaft (2) passes through the fixed shell (5) and extends outward, a rotating plate (6) is provided inside the fixed shell (5), the rotating plate (6) is fixedly mounted on the surface of the rotating shaft (2), and an extension component (7) is mounted on one side of the rotating plate (6); The stretching assembly (7) comprises a fixed shaft (71), a stretching bar (72) and a receiving block (73); the fixed shaft (71) and the receiving block (73) are both fixedly mounted on one side of the rotating plate (6); one end of the stretching bar (72) is rotatably mounted on the surface of the fixed shaft (71); the receiving block (73) is provided with a built-in groove (731); a motion rod (74) and a sliding block (75) are provided inside the built-in groove (731).
2. A hoisting structure for a crane drum according to claim 1, characterized in that: An extension groove (51) is provided on the inner wall of the fixed shell (5), and an array of three extension grooves (51) is provided. The extension assembly (7) is provided with three corresponding extension grooves (51) in the array. A first positioning plane (511) is provided on the wall of the extension groove (51), and a second positioning plane (723) is provided on the other end of the extension strip (72), and the first positioning plane (511) matches the second positioning plane (723).
3. A hoisting structure for a crane drum according to claim 2, characterized in that: A guide hole (721) is provided through the stretching strip (72), a guide post (722) is provided in the guide hole (721), and one end of the guide post (722) is fixedly connected to one side of the rotating plate (6).
4. A hoisting structure for a crane drum according to claim 3, characterized in that: One end of the motion rod (74) is provided with a trigger arc surface (741), the other end of the motion rod (74) passes through the groove wall of the built-in groove (731), and the other end of the motion rod (74) is fixedly connected to the stretching bar (72), and one side of the sliding block (75) is provided with a trigger plane (751), and the trigger arc surface (741) matches the trigger plane (751).
5. The hoisting structure for a crane drum according to claim 4, characterized in that: The wall of the built-in groove (731) is fixedly connected with a fixed block (76), and a sliding rod (77) is provided on the fixed block (76). One end of the sliding rod (77) is fixedly connected to the surface of the fixed block (76), and the other end of the sliding rod (77) is fixedly connected to the limit block (771). The sliding block (75) is sleeved on the surface of the sliding rod (77), and a compression spring (78) is sleeved on the surface of the sliding rod (77). One end of the compression spring (78) is fixedly connected to the side of the sliding block (75) away from the limit block (771), and the other end of the compression spring (78) is fixedly connected to the side of the fixed block (76) toward the sliding block (75).