A foldable wire rope over-release protector
By designing a foldable wire rope over-release protector, and using a braking component and encoder to monitor the rope slack, the problem of easy damage of traditional protectors is solved, thereby improving stability and installation flexibility, and making it suitable for narrow spaces.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGSHA MAIXIN ELECTRONIC TECH CO LTD
- Filing Date
- 2025-07-15
- Publication Date
- 2026-07-03
Smart Images
Figure CN224450128U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of crane technology, and more specifically, relates to a foldable wire rope over-release protector. Background Technology
[0002] Crane wire rope over-release protectors (also known as lower limit protectors or depth limiters) are crucial safety devices. Their core function is to prevent the hook or grab bucket from excessively lowering during descent, which could lead to serious safety accidents such as the wire rope coming off the drum, becoming tangled, or even the hook falling off. Existing traditional rigidly installed levers or limit switches (especially fixed switches near the hook path) are easily damaged by accidental swinging hooks, heavy objects, or obstacles (bending, breaking, or the switch body shattering), causing the protection function to fail and requiring frequent replacements. Therefore, a foldable wire rope over-release protector with good stability and easy installation is needed. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a foldable wire rope over-discharge protector, which can improve the stability of the over-discharge protector, reduce the hardware damage rate caused by accidental impact, reduce downtime and spare parts costs caused by the protector's own damage, and at the same time improve the spatial adaptability and flexibility of installation, making it suitable for application scenarios with narrow spaces.
[0004] This utility model discloses a folding wire rope over-release protector, which includes a winch, a frame, a braking assembly, and a traction rope. The winch includes a pulley and a fixed plate, with the pulley rotatably disposed between the fixed plates. One end of the pulley is fixedly connected to a drive assembly to drive the pulley to rotate. The traction rope is wound around the pulley. The frame is fixedly disposed on the lower side of the winch, and the lower part of the fixed plate is fixedly connected to the upper side of the frame. The braking assembly includes a limiting plate and a mounting plate. The mounting plate is fixedly disposed on the rear side of the frame, and the limiting plate and the mounting plate are rotatably connected. The braking assembly is connected to a rotating assembly to allow the limiting plate to rotate toward the mounting plate. The traction rope is located between the limiting plate and the mounting plate.
[0005] As a further improvement of this utility model, a number of engagement grooves are evenly provided on the mounting plate; a number of limiting protrusions are fixedly provided on the side of the limiting plate near the mounting plate; when the winch is braked, the limiting plate rotates to the side of the mounting plate, and the traction rope is engaged between the engagement grooves and the limiting protrusions.
[0006] As a further improvement of this utility model, the braking assembly also includes a rotating shaft and a torsion spring; the rotating shaft is fixedly disposed between the frames, and the limiting plate and the mounting plate are respectively nested in the rotating shaft; the torsion spring is nested on the outside of the rotating shaft, and the torsion arm of the torsion spring abuts against the limiting plate and the mounting plate respectively.
[0007] As a further improvement of this utility model, the frame is provided with an installation groove and a winding groove; the winding grooves are symmetrically provided on the left and right sides of the frame; the winding grooves are symmetrically provided on the upper and lower sides of the frame.
[0008] As a further improvement of this utility model, the drive assembly includes a traction motor; the traction motor is positioned at the same horizontal height as the winch, and the output end of the traction motor is fixedly connected to the pulley of the winch to drive the pulley to wind or release the traction rope.
[0009] As a further improvement of this utility model, the rotating component includes a rotating motor; the rotating motor is disposed on the outside of the frame, and the output end of the rotating motor is rotatably connected to the braking component through a coupling to drive the limiting plate closer to the mounting plate.
[0010] As a further improvement of this utility model, it also includes an encoder, which is mounted on the winch and electrically connected to the rotating motor through the control system. The encoder is used to calculate the remaining quantity of the traction rope. When the remaining quantity calculated by the control system reaches or falls below a preset threshold, the control system generates an electrical signal and transmits it to the rotating motor.
[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0012] By setting up a braking component, the traction rope can be clamped between the limit plate and the mounting plate, thereby improving the stability of the over-discharge protector, reducing the hardware damage rate caused by accidental impacts, and reducing downtime and spare parts costs due to protector damage. At the same time, it improves the spatial adaptability and flexibility of installation, making it suitable for applications with limited space. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0014] Figure 2 This is a schematic diagram of the braking component of this utility model when it is not stopped;
[0015] Figure 3 This is a schematic diagram of the operation of the braking component of this utility model;
[0016] Figure 4 This is another schematic diagram of the braking assembly of this utility model;
[0017] Figure 5 This is a schematic diagram of the limiting plate of this utility model.
[0018] Explanation of the labels in the diagram:
[0019] 1. Winch reel, 2. Traction motor, 3. Frame, 31. Mounting slot, 32. Rewinding slot, 4. Braking assembly, 41. Limiting plate, 42. Mounting plate, 43. Shaft, 44. Torsion spring, 45. Engaging groove, 46. Limiting block. Detailed Implementation
[0020] Specific Implementation Example 1: Please refer to Figures 1-5 A folding wire rope over-release protector includes a winch 1, a traction motor 2, a frame 3, a braking assembly 4, and a traction rope 5.
[0021] The winch 1 includes a pulley and a fixed plate. The pulley is rotatably mounted between the fixed plates, and one end of the pulley is fixedly connected to a drive assembly to drive the pulley to rotate. A traction rope 5 is wound around the pulley. In this embodiment, the traction rope 5 is a steel wire rope, and the drive assembly is a traction motor 2. The traction motor 2 is positioned at the same horizontal height as the winch 1, and its output end is fixedly connected to the pulley of the winch 1 to drive the pulley to wind or release the traction rope 5.
[0022] The frame 3 is fixedly mounted on the lower side of the winch 1, and the lower part of the fixing plate is fixedly connected to the upper side of the frame 3. The frame 3 has an installation groove 31 and a winding groove 32. The winding grooves 32 are symmetrically located on the left and right sides of the frame 3. The winding grooves 32 are symmetrically located on the upper and lower sides of the frame 3, and the traction rope 5 moves up and down through the winding grooves 32.
[0023] The braking assembly 4 includes a limiting plate 41, a mounting plate 42, a rotating shaft 43, and a torsion spring 44. The mounting plate 42 is fixedly mounted on the rear side of the frame 3, and the limiting plate 41 is rotatably connected to the mounting plate 42. The outer side of the limiting plate 41 is connected to a rotating assembly to allow the limiting plate 41 to rotate toward the mounting plate 42. The traction rope 5 is located between the limiting plate 41 and the mounting plate 42.
[0024] The mounting plate 42 has a plurality of evenly spaced engagement grooves 45. A plurality of limiting protrusions 46 are fixedly mounted on the side of the limiting plate 41 near the mounting plate 42. When the winch 1 is braked, the limiting plate 41 rotates towards the mounting plate 42, and the traction rope 5 engages between the engagement grooves 45 and the limiting protrusions 46. The engagement grooves 45 are located on the left side of the mounting plate 42, and the limiting protrusions 46 correspond one-to-one with the engagement grooves 45 when the limiting plate 41 rotates to be parallel to the mounting plate 42.
[0025] The rotating shaft 43 is fixedly installed between the frames 3, and the limiting plate 41 and the mounting plate 42 are respectively nested in the rotating shaft 43. The torsion spring 44 is nested on the outside of the rotating shaft 43, and the torsion arm of the torsion spring 44 abuts against the limiting plate 41 and the mounting plate 42 respectively.
[0026] In this embodiment, the rotating component can be a rotary motor or a push rod motor. When a rotary motor is used, it is located on the outside of the frame 3 (not shown in the figure), and its output end is rotatably connected to the rotating shaft 43 via a coupling to drive the limiting plate 41 closer to the mounting plate 42. When a push rod motor is used, it is located on the outside of the frame 3 (not shown in the figure), and its output end is connected to the limiting plate 41 to push the limiting plate 41 to rotate toward the mounting plate 42. It should be noted that using a rotary motor and coupling to drive the rotating shaft 43 to rotate, and using a push rod motor to push the limiting plate 41, are both existing conventional technologies, and their specific connection relationships and working principles will not be elaborated here.
[0027] Preferably, this protector also includes an encoder, which is installed between the winch 1 and the traction motor 2. The encoder is electrically connected to the rotary motor or push rod motor through a control system. The encoder includes a code disk, a read head, and electronic circuitry. The code disk is directly mounted on the output shaft of the traction motor 2 via a bushing. The read head includes an infrared LED and a photodetector. The read head is mounted on the stator housing (stationary part) of the motor via a fixed bracket. The optical center axis of the read head coincides with the center axis of the code disk, and the photosensitive surface is parallel to the surface of the code disk. The encoder is used to calculate the remaining quantity of the traction rope 5. When the remaining quantity calculated by the control system reaches or falls below a preset threshold, the control system generates an electrical signal and transmits it to the rotary motor.
[0028] Working principle:
[0029] The encoder is used to calculate the remaining quantity of the traction rope 5. When the remaining quantity calculated by the control system reaches or falls below a preset threshold, the control system generates an electrical signal and transmits it to the rotating motor. The limit plate 41 rotates towards the mounting plate 42, engaging the traction rope 5 between the engagement groove 45 and the limit protrusion 46. By braking and clamping the traction rope between the limit plate and the mounting plate, the stability of the over-discharge protector can be improved, the hardware damage rate caused by accidental impact can be reduced, and the downtime and spare parts costs caused by the protector's own damage can be reduced. At the same time, the space adaptability and flexibility of the installation can be improved, making it suitable for applications with limited space.
Claims
1. A folding wire rope overpay protector characterized by: The assembly includes a winch (1), a frame (3), a braking assembly (4), and a traction rope (5). The winch (1) includes a pulley and a fixed plate. The pulley is rotatably disposed between the fixed plates. One end of the pulley is fixedly connected to the drive assembly to drive the pulley to rotate. The traction rope (5) is wrapped around the pulley. The frame (3) is fixedly disposed on the lower side of the winch (1). The lower part of the fixed plate is fixedly connected to the upper side of the frame (3). The braking assembly (4) includes a limiting plate (41) and a mounting plate (42). The mounting plate (42) is fixedly disposed on the rear side of the frame (3). The limiting plate (41) and the mounting plate (42) are rotatably connected. The braking assembly (4) is connected to the rotating assembly to make the limiting plate (41) rotate toward the mounting plate (42). The traction rope (5) is located between the limiting plate (41) and the mounting plate (42).
2. A folding wire rope overwind protector according to claim 1, characterized in that: The mounting plate (42) has several evenly spaced engagement grooves (45); the limiting plate (41) has several limiting protrusions (46) fixedly installed on the side near the mounting plate (42); when the winch (1) is braked, the limiting plate (41) rotates towards the mounting plate (42), and the traction rope (5) is engaged between the engagement grooves (45) and the limiting protrusions (46).
3. The folding wire rope overpay protector of claim 1, wherein: The braking assembly (4) also includes a rotating shaft (43) and a torsion spring (44); the rotating shaft (43) is fixedly disposed between the frame (3), and the limiting plate (41) and the mounting plate (42) are respectively nested in the rotating shaft (43); the torsion spring (44) is nested on the outside of the rotating shaft (43), and the torsion arm of the torsion spring (44) abuts against the limiting plate (41) and the mounting plate (42) respectively.
4. The folding wire rope overload protector of claim 1, wherein: The frame (3) is provided with mounting groove (31) and winding groove (32); the winding groove (32) is symmetrically provided on the left and right sides of the frame (3); the winding groove (32) is symmetrically provided on the upper and lower sides of the frame (3).
5. The folding wire rope overload protector of claim 1, wherein: The drive assembly includes a traction motor (2); the traction motor (2) is positioned at the same horizontal level as the winch (1), and the output end of the traction motor (2) is fixedly connected to the pulley of the winch (1) to drive the pulley to wind or release the traction rope (5).
6. The folding wire rope overload protector of claim 1, wherein: The rotating assembly includes a rotating motor; the rotating motor is located on the outside of the frame (3), and the output end of the rotating motor is rotatably connected to the braking assembly (4) through a coupling to drive the limiting plate (41) to approach the mounting plate (42).
7. A folding wire rope over-release protector according to claim 6, characterized in that: It also includes an encoder, which is installed on the winch (1) and electrically connected to the rotating motor through the control system. The encoder is used to calculate the remaining quantity of the traction rope (5). When the remaining quantity calculated by the control system reaches or falls below a preset threshold, the control system generates an electrical signal and transmits it to the rotating motor.