Bidirectional self-locking hoist

Abstract

The utility model discloses a kind of two-way self-locking winch, it is related to winch technical field, to solve the technical problem that current winch cannot enable different independent self-locking components respectively when drum slow and fast, including winch component, the winch component includes rack and drum, the drum can be driven by speed reduction driving component;Fast self-locking component is arranged at the drum one end of winch component, the utility model has when drum slow rotation, by slow speed self-locking component locking winch component and drum, when drum fast rotation, by centrifugal force triggering fast self-locking component, emergency locking the drum of winch component, then by slow speed self-locking component locking drum, two-way self-locking and apply two independent self-locking components to lock when drum different speed, alleviate using a set of self-locking components, self-locking sensitivity is difficult to balance, prone to the situation of " false lock " or " lock lag ".

Description

Technical Field

[0001] This utility model relates to the field of winch technology, and more specifically, to a bidirectional self-locking winch. Background Technology

[0002] A winch is a lifting machine that uses a drum to wind ropes or chains to lift and pull heavy objects. It is widely used in construction, mining, water conservancy, forestry, logistics and other fields, and is an important piece of equipment for realizing the vertical lifting or horizontal movement of heavy objects.

[0003] Winches can be divided into several types: electric winches and manual winches (hand-cranked winches). Manual winches rely on human power to turn the crank handle and are suitable for light loads, situations without power, or emergency scenarios, such as small hoisting and field operations. Among them, electric winches are the most common. They are driven by an electric motor and are suitable for fixed operation scenarios. They are highly efficient and easy to control. The basic working principle of a winch is to drive the drum to rotate through a power device. The friction between the drum and the rope drives the rope to wind or release, thereby lifting or pulling heavy objects.

[0004] Existing winches have the following drawbacks: self-locking sensitivity is difficult to balance, easily leading to "false locking" or "locking delay." If the trigger threshold of the self-locking component is set too strictly (e.g., excessive brake pad preload or excessive torsion spring force), it may trigger self-locking even with minor external force fluctuations (such as slight rope swaying) during normal operation, resulting in "false locking" and affecting work efficiency. If the threshold is set too loosely, locking delay may occur in sudden situations (such as sudden load drop or loss of control), failing to brake in time and posing a safety hazard. Therefore, we propose a bidirectional self-locking winch. Utility Model Content

[0005] The purpose of this invention is to provide a bidirectional self-locking winch to address the aforementioned shortcomings in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a hoisting assembly, the hoisting assembly including a frame and a drum, the drum being driven by a speed reduction drive assembly;

[0007] A quick self-locking assembly is provided at one end of the drum of the hoisting assembly. It includes an elastic guide assembly vertically installed at one end of the drum of the hoisting assembly, an inner toothed ring fixed to the outer side wall of the frame of the hoisting assembly, and a magnetic suction assembly. The end of the elastic guide assembly is equipped with a locking tooth block, which can mesh with the inner toothed ring.

[0008] The magnetic attraction assembly includes an annular electromagnet mounted on the outer wall of the inner tooth ring, and a magnetic attraction block that can magnetically engage with the annular electromagnet is mounted on the outer wall of the locking tooth block.

[0009] The slow-speed self-locking component is located at the other end of the drum of the hoisting assembly.

[0010] As a further description of the above technical solution: the elastic guide assembly includes a guide sleeve that is vertically fixed to one end of the drum of the hoisting assembly. A slider is slidably connected inside the guide sleeve. One end of a spring and one end of a guide post are fixed to the two ends of the slider, respectively. The spring is located inside the guide sleeve and its other end is fixed inside the guide sleeve.

[0011] As a further description of the above technical solution: the magnetic attraction force of the magnetic attraction component is greater than the spring force when the spring rebounds.

[0012] As a further description of the above technical solution: the cross-sections of the guide sleeve and the guide post are both polygonal.

[0013] As a further description of the above technical solution: a speed reduction drive assembly is installed on the inner side wall of the frame of the hoisting assembly. The speed reduction drive assembly includes a motor, sprockets and chains, and there are several sprockets with different diameters.

[0014] The bidirectional self-locking winch provided by this utility model, as described above, has the following beneficial effects:

[0015] This invention features a two-way self-locking mechanism that locks the winch assembly and the winch assembly through a slow-speed self-locking component when the winch is rotating at a slow speed. When the winch is rotating at a fast speed, centrifugal force triggers a fast-speed self-locking component to lock the winch assembly's ... Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0018] Figure 2 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0019] Figure 3 An exploded view of the quick-locking assembly provided in this embodiment of the utility model;

[0020] Figure 4 This is a cross-sectional structural diagram of the fast self-locking component provided in an embodiment of the present invention.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Hoisting assembly; 2. Fast self-locking assembly; 3. Slow self-locking assembly; 4. Gear reduction drive assembly;

[0023] 201. Elastic guide assembly; 202. Locking tooth block; 203. Internal toothed ring; 204. Magnetic suction assembly;

[0024] 2011, Guide sleeve; 2012, Spring; 2013, Slider; 2014, Guide post;

[0025] 2041, Ring electromagnet; 2042, Magnetic block. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0027] Please see Figures 1-4 The present invention provides a technical solution: including a hoisting assembly 1, the hoisting assembly 1 including a frame and a drum, the drum being driven by a speed reduction drive assembly 4;

[0028] The hoist assembly 1 includes a frame and a drum. The frame provides support for the overall structure and is used to fix the drum, the speed reduction drive assembly 4 and other auxiliary components to ensure the stability of the equipment during operation. The drum is the core working component, used to wind steel wire rope or chain, and to lift or pull heavy objects by forward and reverse rotation. The two ends of the drum are respectively connected to the fast self-locking assembly 2 and the slow self-locking assembly 3, which can rotate under the drive of the speed reduction drive assembly 4.

[0029] The quick self-locking component 2 is set at one end of the drum of the hoisting component 1. It includes an elastic guide component 201 vertically installed at one end of the drum of the hoisting component 1, an inner toothed ring 203 fixed to the outer side wall of the frame of the hoisting component 1, and a magnetic suction component 204. A locking tooth block 202 is installed at the end of the elastic guide component 201. The locking tooth block 202 can mesh with the inner toothed ring 203.

[0030] In another embodiment of the present invention, preferably, the elastic guide component 201 includes a guide sleeve 2011 vertically fixed to one end of the drum of the hoisting component 1. A slider 2013 is slidably connected inside the guide sleeve 2011. One end of a spring 2012 and one end of a guide post 2014 are respectively fixed to both ends of the slider 2013. The spring 2012 is located inside the guide sleeve 2011 and its other end is fixed inside the guide sleeve 2011.

[0031] In another embodiment of this utility model, both the guide sleeve 2011 and the guide post 2014 have polygonal cross-sections.

[0032] The magnetic attraction assembly 204 includes an annular electromagnet 2041 installed on the outer wall of the inner tooth ring 203, and a magnetic attraction block 2042 installed on the outer wall of the locking tooth block 202, which can magnetically engage with the annular electromagnet 2041.

[0033] In another embodiment of the present invention, the magnetic attraction force of the magnetic attraction component 204 is greater than the elastic force of the spring 2012 when it rebounds.

[0034] The quick-locking assembly 2 is located at one end of the drum and is designed to deal with emergencies such as sudden falls or uncontrolled acceleration caused by rapid drum rotation. It locks by centrifugal force to achieve emergency braking. It includes an elastic guide assembly 201, which is vertically installed at one end of the drum and provides radial guidance and elastic restoring force for the locking tooth block 202.

[0035] In the preferred embodiment, the elastic guide assembly 201 consists of a guide sleeve 2011, a spring 2012, a slider 2013, and a guide post 2014. The guide sleeve 2011 is vertically fixed to the end face of the drum and internally slidably connected to the slider 2013. One end of the slider 2013 is connected to the spring 2012 (the other end of the spring 2012 is fixed inside the guide sleeve 2011), and the other end is connected to the guide post 2014. The cross-sections of the guide sleeve 2011 and the guide post 2014 are both polygonal (such as square or hexagonal), which can effectively prevent relative rotation and ensure guiding stability. The locking tooth block 202 is installed at the end of the guide post 2014 of the elastic guide assembly 201, and its tooth shape can be adapted to the internal tooth ring 203. The internal tooth ring 203 is fixed to the outer wall of the frame and forms a meshing engagement with the locking tooth block 202.

[0036] When the roller of the hoisting assembly 1 rotates at high speed, the centrifugal force causes the locking tooth block 202 at the end of the elastic guide assembly 201 to be thrown out. When the locking tooth block 202 is embedded in the inner tooth ring 203, it can directly prevent the drum from rotating.

[0037] The magnetic attraction assembly 204 includes an annular electromagnet 2041 mounted on the outer wall of the inner tooth ring 203, and a magnetic attraction block 2042 (such as a permanent magnet) fixed to the outer wall of the locking tooth block 202.

[0038] It should be noted that the magnetic attraction force of the magnetic component 204 is greater than the rebound force of the spring 2012, ensuring that the locking tooth block 202 can be stably attracted in the locked state, and preventing the spring 2012 from rebounding and causing the locking tooth block 202 to separate from the inner tooth ring 203 in the locked state.

[0039] The slow-speed self-locking component 3 is located at the other end of the drum of the hoisting component 1.

[0040] Located at the other end of the drum, it can lock the drum in slow conditions. It includes a gear fixed to the other end of the drum and an arc-shaped tooth that can be driven to translate by an existing power component and can mesh with the gear. The arc-shaped tooth is driven to translate by the existing power component to mesh with the outer wall of the gear at the other end of the drum, thereby achieving locking. The existing power component includes a self-locking electric telescopic rod; it also includes a motor, a self-locking worm gear and lead screw displacement drive component.

[0041] In another embodiment of the present invention, a speed reduction drive assembly 4 is installed on the inner side wall of the frame of the hoist assembly 1. The speed reduction drive assembly 4 includes a motor, sprockets and chains, and there are several sprockets with different diameters.

[0042] The speed reduction drive assembly 4 is installed on the inner side wall of the frame. It provides power to the drum and adjusts the speed. It consists of an electric motor, multiple sprockets of different diameters and chains. By using different combinations of sprockets, speed reduction and torque increase are achieved to ensure that the drum can output sufficient torque to drive the heavy object. At the same time, the rotation speed is controlled to adapt to different working conditions.

[0043] Working Principle: This embodiment provides a bidirectional self-locking winch. In use, an external power supply is used, and the annular electromagnet 2041 is turned on by an external switch. When the drum is running at a normal speed (not high speed, not stationary) driven by the reduction drive assembly 4, that is, when the drum is rotating slowly, the winch assembly 1 and the drum are locked by the slow self-locking assembly 3. In the fast self-locking assembly 2, the drum also rotates at a normal speed. Centrifugal force causes the elastic guide assembly 201 to be thrown out, but it is thrown out a short distance, so that there is a distance between the locking tooth block 202 and the inner tooth ring 203, allowing the drum to still rotate smoothly. In actual use, a spring 2012 with appropriate elasticity needs to be selected according to the usage requirements. When it is necessary to lock the drum, an external power supply can be used, and the slow self-locking assembly 3 can be turned on by an external switch to lock the drum. The drum is directly locked by mechanical constraint to prevent the load from slowly sliding down due to gravity and to ensure the stability of the position during operation.

[0044] When the drum speed increases sharply due to a sudden malfunction (such as loss of power control or signs of rope breakage), under the action of centrifugal force, the locking tooth block 202 of the fast self-locking component 2 overcomes the elastic force of the spring 2012 (centrifugal force > spring 2012 return force), and the locking tooth block 202 at the end of the elastic guide component 201 is thrown out and quickly engages with the inner tooth ring 203. At the same time, the magnetic block 2042 enters the magnetic attraction range of the annular electromagnet 2041 and is attracted by the normally open annular electromagnet 2041 (magnetic attraction force > spring 2012 return force), maintaining a relatively stable locking state and achieving emergency braking to prevent the drum from continuing to accelerate. At the same time, the slow self-locking component 3 responds synchronously, further enhancing the locking effect and forming a double guarantee to avoid the safety risks caused by the failure of a single component.

[0045] When the roller rotates rapidly, the rapid self-locking component 2 is triggered by centrifugal force to lock the roller of the hoisting component 1 in an emergency. Then, the roller is locked by the slow self-locking component 3. The roller is self-locked in both directions and two independent self-locking components are used to lock the roller at different speeds. This reduces the difficulty in balancing the self-locking sensitivity when using a single self-locking component, which can easily lead to "false locking" or "locking delay".

[0046] In case of an emergency requiring the release of the bidirectional graded locking mechanism, an external power supply is used to turn off the annular electromagnet 2041 via an external switch. The spring 2012's rebound force pulls the locking tooth block 202 out of the inner tooth ring 203 and resets it, thus releasing the locking state of the slow-speed self-locking component 3. The drum can then resume normal operation (the hoisting component 1, the reduction drive component 4, and the annular electromagnet 2041 are all existing products and are all connected to an external power supply and an external switch).

[0047] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A bidirectional self-locking winch, characterized in that, Includes a hoisting assembly (1), which includes a frame and a drum, the drum being driven by a speed reduction drive assembly (4); A quick self-locking assembly (2) is provided at one end of the drum of the hoisting assembly (1), including an elastic guide assembly (201) vertically installed at one end of the drum of the hoisting assembly (1), an inner toothed ring (203) fixed to the outer side wall of the frame of the hoisting assembly (1), and a magnetic suction assembly (204). A locking tooth block (202) is installed at the end of the elastic guide assembly (201), and the locking tooth block (202) can mesh with the inner toothed ring (203). The magnetic attraction assembly (204) includes an annular electromagnet (2041) installed on the outer wall of the inner tooth ring (203), and a magnetic attraction block (2042) that can magnetically engage with the annular electromagnet (2041) is installed on the outer wall of the locking tooth block (202). The slow-speed self-locking component (3) is located at the other end of the drum of the hoisting component (1).

2. The bidirectional self-locking winch according to claim 1, characterized in that, The elastic guide assembly (201) includes a guide sleeve (2011) vertically fixed to one end of the drum of the hoisting assembly (1). A slider (2013) is slidably connected inside the guide sleeve (2011). One end of a spring (2012) and one end of a guide post (2014) are fixed to the two ends of the slider (2013). The spring (2012) is located inside the guide sleeve (2011) and its other end is fixed inside the guide sleeve (2011).

3. A bidirectional self-locking winch according to claim 2, characterized in that, The magnetic attraction force of the magnetic component (204) is greater than the elastic force of the spring (2012) when it rebounds.

4. A bidirectional self-locking winch according to claim 3, characterized in that, The cross-sections of both the guide sleeve (2011) and the guide post (2014) are polygonal.

5. A bidirectional self-locking winch according to claim 4, characterized in that, The hoist assembly (1) has a speed reduction drive assembly (4) installed on the inner side wall of the frame. The speed reduction drive assembly (4) includes a motor, sprockets and chains. There are several sprockets with different diameters.

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