Self-locking anti-unhooking mechanism for crane
By combining the design of limit strips, electric actuators and positioning plates, a multi-layer anti-detachment protection is formed, which solves the problem of hooks easily falling off in the existing technology and improves the safety and reliability of hooks.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 苗现正
- Filing Date
- 2025-06-11
- Publication Date
- 2026-04-24
AI Technical Summary
Existing technologies such as spring baffle anti-disengagement devices are prone to failure and self-weight baffle devices are prone to detachment, resulting in weak hook safety and inability to effectively prevent suspended goods from falling off.
The first layer of anti-detachment protection consists of a limit strip, a first electric push rod, a positioning plate, and a cutting block. The second layer of anti-detachment protection is achieved by pressing the positioning plate into the positioning groove. The third layer of anti-detachment protection is achieved by pressing the second electric push rod into the limit groove. Combined with the support frame supporting the electric push rod, a multi-layer anti-detachment mechanism is formed.
It achieves multi-layered anti-detachment protection, improves the safety of the hook during use, ensures that the suspended goods are not easily detached, and enhances the reliability of the hook.
Smart Images
Figure CN224160294U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of crane hoisting equipment technology, specifically to a self-locking anti-disengagement mechanism for cranes. Background Technology
[0002] In applications such as automobile repair and steel hoisting, gantry cranes are typically used, which in turn employ hooks to lift the items that need to be hoisted. To prevent hook detachment, more reliable hooks are required to ensure that the rope does not come loose.
[0003] Related anti-disengagement devices include spring-loaded baffle devices and self-weight stop bar type disengagement devices. The spring-loaded baffle device has a spring-loaded cover installed at the hook opening; the cover can only be pressed down, preventing the rigging from slipping out of the opening. The self-weight stop bar type disengagement device has two U-shaped parts made of round steel welded together at 60-90° at the hook opening. The front U-shaped part is slightly longer than the hook opening distance, and the rear U-shaped part is longer than the front U-shaped part. Gravity holds the front U-shaped part tightly against the inside of the hook, preventing the rigging from slipping out of the opening.
[0004] The disadvantages of spring baffle anti-disengagement devices include: springs are prone to failure and breakage; baffles are easily deformed and fail due to impacts; their service life is short; they need to be replaced frequently, increasing maintenance costs. The disadvantages of self-weight lever-type disengagement devices include: when the hook swings laterally and jumps up and down, the front U-shaped part easily detaches from the hook, losing its protective function. Most of the hooks described above only have one type of anti-disengagement protection; when the initial anti-disengagement protection fails, the lugs of the suspended goods can easily detach from the hook, making the hook less safe to use. To solve these problems, a self-locking anti-disengagement mechanism for cranes is proposed. Utility Model Content
[0005] In view of this, the present invention provides a self-locking anti-detachment hook mechanism for cranes. The present invention provides the first layer of anti-detachment protection for the hook lugs by using a limiting strip. Then, by activating the first electric push rod, the positioning plate and the cutting block connected to it are moved. By pressing the positioning plate into the positioning groove, the cutting block is then moved into the cutting groove, thus providing the second layer of anti-detachment protection. Finally, the second electric push rod presses the limiting rod into the limiting groove, thus providing the third layer of anti-detachment protection for the hook lugs inside the hook.
[0006] To solve the above-mentioned technical problems, this utility model provides a self-locking anti-disengagement mechanism for cranes, including a sling installed on the crane, a pulley frame installed at the sling's bearing end, a hook rotatably installed at the bottom of the pulley frame, the hook head being rotatably connected to the pulley frame via a bearing, a first electric push rod symmetrically arranged on the upper part of the hook body, a positioning plate being provided at the telescopic end of the first electric push rod, and a positioning groove being provided at the bottom of the hook body, the positioning groove being adapted to the positioning plate.
[0007] A fixing block is provided on the surface of the drive end of the first electric actuator. The fixing block is used to connect the first electric actuator to the pulley frame, thereby supporting the first electric actuator. The fixing block is connected to the outer wall of the pulley frame.
[0008] A blade block is fixedly installed at the bottom of the positioning plate. The blade block is used to engage with the blade groove, thereby preventing the positioning plate from falling out after entering the positioning groove. A blade groove is provided at the bottom of the positioning groove, which is used to receive the blade block, thereby connecting the positioning plate, the blade block, and the hook. The blade groove and the blade block are compatible.
[0009] A limiting strip is provided at the bottom of the blade groove. The limiting strip is used to prevent the hook lug or other supporting parts inside the hook from falling off the inner ring of the hook. The limiting strip is arc-shaped and fixed to the inner ring of the hook.
[0010] The hook has an opening at the tail end from top to bottom. The opening is used to allow the second electric actuator to drive the limiting rod into the limiting groove, thereby locking the hook. The bottom of the opening has a limiting groove for receiving the limiting rod. The top of the opening has a second electric actuator for driving the limiting rod to move up and down. The second electric actuator is also used to connect the limiting rod to the support frame.
[0011] The bottom of the telescopic end of the second electric actuator is equipped with a limit rod. The limit rod is used to insert into the limit groove, thereby sealing and locking the hook's mounting port. The bottom end of the limit rod fits into the limit groove.
[0012] The top of the drive end of the second electric actuator is provided with a support frame. The support frame is used to fix the drive end of the second electric actuator, thereby connecting the second electric actuator to the outer wall of the pulley frame and supporting the second electric actuator. The support frame is U-shaped and is connected to the top of the outer wall of the pulley frame.
[0013] In summary, compared with the prior art, the present invention has at least one of the following beneficial technical effects:
[0014] 1. The first layer of anti-detachment protection for the hook ear is provided by the limiting strip. Then, the positioning plate and blade block connected to it are moved by activating the first electric push rod. The positioning plate is pressed into the positioning groove, and the blade block is then put into the blade groove, thus providing the second layer of anti-detachment protection. The second electric push rod is then pressed into the limiting groove, thus providing the third layer of anti-detachment protection for the hook ear.
[0015] 2. The opening is used to allow the second electric actuator to drive the limit rod into the limit groove, thereby locking the hook. The second electric actuator is used to drive the limit rod to move up and down, and the second electric actuator is also used to connect the limit rod to the support frame.
[0016] 3. The support frame is used to fix the drive end of the second electric push rod, thereby connecting the second electric push rod to the outer wall of the pulley frame, and thus supporting the second electric push rod. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the main structure of this utility model;
[0018] Figure 2 This utility model Figure 1 A magnified view of part A;
[0019] Figure 3 This is a schematic diagram of the assembly structure of this utility model;
[0020] Figure 4 This is a side sectional view of the present invention.
[0021] Explanation of reference numerals in the attached drawings: 100, sling; 101, pulley frame; 102, hook; 200, first electric actuator; 201, positioning plate; 202, positioning groove; 203, fixing block; 204, cutting edge block; 205, cutting edge groove; 206, limiting strip; 300, opening; 301, limiting groove; 302, second electric actuator; 303, support frame; 304, limiting rod. Detailed Implementation
[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the following will be described in conjunction with the accompanying drawings of the embodiments of this utility model. Figure 1-4 The technical solutions of the embodiments of this utility model are clearly and completely described below. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.
[0023] like Figure 1-4 As shown: This embodiment provides a self-locking anti-disengagement mechanism for a crane, including a sling 100 mounted on the crane. The sling 100 is made of stainless steel. A pulley frame 101 is mounted on the receiving end of the sling 100. A pulley block is mounted inside the pulley frame 101 and connected to the sling 100. A hook 102 is rotatably mounted at the bottom of the pulley frame 101. The hook 102 is a ram's horn type hook. The hook head of the hook 102 is rotatably connected to the pulley frame 101 via a bearing. A first electric push rod 200 is symmetrically mounted on the upper part of the hook body of the hook 102. A positioning plate 201 is mounted on the telescopic end of the first electric push rod 200. The positioning plate 201 is fixed to the telescopic end of the first electric push rod 200 by bolts. A positioning groove 202 is mounted on the bottom of the hook body of the hook 102. The positioning groove 202 is embedded in the hook body of the hook 102 and corresponds to and is adapted to the positioning plate 201.
[0024] When in use, after the hook ear enters the hook of the hook 102, the limiting strip 206 provides the first layer of anti-detachment protection for the hook ear. Then, by activating the first electric push rod 200, the positioning plate 201 and the blade block 204 connected to it are moved. By pressing the positioning plate 201 into the positioning groove 202, the blade block 204 is moved into the blade groove 205, thus providing the second layer of anti-detachment protection. Then, the second electric push rod 302 presses the limiting rod 304 into the limiting groove 301, thus providing the third layer of anti-detachment protection for the hook ear in the hook 102.
[0025] This embodiment provides a self-locking anti-disengagement mechanism for cranes.
[0026] like Figure 1 , 2 As shown in Figures 3 and 4: A fixing block 203 is provided on the surface of the driving end of the first electric actuator 200. A through hole is provided in the fixing block 203 for the movement of the telescopic end of the first electric actuator 200. The fixing block 203 is used to connect the first electric actuator 200 to the pulley frame 101, thereby supporting the first electric actuator 200. The fixing block 203 and the outer wall of the pulley frame 101 can be welded or connected by bolts.
[0027] Its effect is as follows: the fixing block 203 is provided with a through hole for the telescopic end of the first electric push rod 200 to move. The fixing block 203 is used to connect the first electric push rod 200 with the pulley frame 101, thereby supporting the first electric push rod 200.
[0028] like Figure 1 , 2 As shown in Figure 4: A blade block 204 is fixedly provided at the bottom of the positioning plate 201. The blade block 204 is welded to the positioning plate 201. The blade block 204 is used to fit into the blade groove 205, thereby preventing the positioning plate 201 from falling after entering the positioning groove 202. A blade groove 205 is provided at the bottom of the positioning groove 202. The blade groove 205 is embedded in the hook body of the hook 102. The blade groove 205 is used to support the blade block 204, thereby connecting the positioning plate 201, the blade block 204 and the hook 102. The blade groove 205 and the blade block 204 are compatible.
[0029] Its effect is as follows: the blade block 204 is used to be inserted into the blade groove 205, thereby preventing the positioning plate 201 from falling after entering the positioning groove 202. The blade groove 205 is used to receive the blade block 204, thereby connecting the positioning plate 201, the blade block 204 and the hook 102, thereby providing a second layer of anti-detachment protection for the hook 102.
[0030] like Figure 1 , 2As shown in Figure 4: A limiting strip 206 is provided at the bottom of the blade groove 205. The limiting strip 206 is welded to the hook body of the hook 102 or integrally cast. The limiting strip 206 is used to prevent the hook ear or other supporting parts that enter the hook 102 from falling off the inner ring of the hook 102. The limiting strip 206 is arc-shaped and fixed to the inner ring of the hook 102.
[0031] Its effect is as follows: the limiting strip 206 is used to prevent the hook ear or other supporting parts inside the hook 102 from falling off the inner ring of the hook 102. The limiting strip 206 is arc-shaped and fixed to the inner ring of the hook 102. The limiting strip 206 provides the first layer of anti-detachment protection for the hook 102.
[0032] like Figure 1 , 2 As shown in Figures 3 and 4: The hook tail end of hook 102 is provided with an opening 300 from top to bottom. The opening 300 passes through the hook tail of hook 102. The opening 300 is used to allow the second electric push rod 302 to drive the limiting rod 304 into the limiting groove 301, thereby locking hook 102. The bottom of the opening 300 is provided with a limiting groove 301. The bottom of the limiting groove 301 is provided with a structure for locking the limiting rod 304. The limiting groove 301 and the hook tail of hook 102 can be fixed by bolts or welded. The limiting groove 301 is used to receive the limiting rod 304. The top of the opening 300 is provided with a second electric push rod 302. The driving end of the top of the second electric push rod 302 is fixed to the support frame 303 by bolts. The second electric push rod 302 is used to drive the limiting rod 304 to move up and down. The second electric push rod 302 is also used to connect the limiting rod 304 to the support frame 303.
[0033] Its effect is as follows: the opening 300 is used to allow the second electric push rod 302 to drive the limiting rod 304 to insert into the limiting groove 301, thereby locking the hook 102. The second electric push rod 302 is used to drive the limiting rod 304 to move up and down. The second electric push rod 302 is also used to connect the limiting rod 304 to the support frame 303.
[0034] like Figure 1 , 2 As shown in Figure 4: A limiting rod 304 is provided at the bottom of the telescopic end of the second electric actuator 302. The limiting rod 304 can be welded to the telescopic end of the second electric actuator 302. The limiting rod 304 is used to insert into the limiting groove 301, thereby sealing and locking the mounting port of the hook 102. The bottom end of the limiting rod 304 fits into the limiting groove.
[0035] Its effect is as follows: the limiting rod 304 is used to insert into the limiting groove 301, thereby sealing and locking the mounting port of the hook 102, so that the hook 102 gets a third layer of anti-detachment protection.
[0036] like Figure 1 , 2As shown in Figure 4: A support frame 303 is provided on the top of the drive end of the second electric actuator 302. The support frame 303 is used to fix the drive end of the second electric actuator 302, thereby connecting the second electric actuator 302 to the outer wall of the pulley frame 101 and supporting the second electric actuator 302. The support frame 303 is U-shaped and consists of two symmetrical vertical support rods and one horizontal support rod. The drive end of the second electric actuator 302 is connected and fixed to the horizontal support rod on the support frame 303. The vertical support rod on the support frame 303 is connected to the top of the outer wall of the pulley frame 101 by bolts.
[0037] Its effect is as follows: the support frame 303 is used to fix the drive end of the second electric push rod 302, thereby connecting the second electric push rod 302 to the outer wall of the pulley frame 101, thereby supporting the second electric push rod 302.
[0038] Working principle: After the lug enters the hook of the hook 102, the limiting strip 206 provides the first layer of anti-detachment protection for the lug. Then, by activating the first electric push rod 200, the positioning plate 201 and the blade block 204 connected to it are moved. By pressing the positioning plate 201 into the positioning groove 202, the blade block 204 is moved into the blade groove 205, thus providing the second layer of anti-detachment protection. Then, the second electric push rod 302 presses the limiting rod 304 into the limiting groove 301, thus providing the third layer of anti-detachment protection for the lug inside the hook 102. Thus, the hook 102 has multiple layers of protection when hanging goods, thereby improving the safety of the hook during operation.
[0039] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0040] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.
Claims
1. A self-locking anti-disengagement mechanism for a crane, comprising a sling (100) mounted on the crane, a pulley frame (101) mounted on the receiving end of the sling (100), and a hook (102) rotatably mounted on the bottom of the pulley frame (101), characterized in that: The hook head of the hook (102) is rotatably connected to the pulley frame (101) via a bearing. A first electric push rod (200) is symmetrically arranged on the upper part of the hook body of the hook (102). The telescopic end of the first electric push rod (200) is provided with a positioning plate (201). A positioning groove (202) is provided at the bottom of the hook body of the hook (102). The positioning groove (202) is adapted to the positioning plate (201).
2. The self-locking anti-disengagement mechanism for a crane as described in claim 1, characterized in that: A fixing block (203) is provided on the surface of the driving end of the first electric actuator (200), and the fixing block (203) is connected to the outer wall of the pulley frame (101).
3. The self-locking anti-disengagement mechanism for a crane as described in claim 2, characterized in that: The bottom of the positioning plate (201) is fixedly provided with a blade block (204), and the bottom of the positioning groove (202) is provided with a blade groove (205), which is adapted to the blade block (204).
4. A self-locking anti-disengagement mechanism for a crane as described in claim 3, characterized in that: The bottom of the cutting groove (205) is provided with a limiting strip (206), which is arc-shaped and fixed to the inner ring of the hook (102).
5. A self-locking anti-disengagement mechanism for a crane as described in claim 4, characterized in that: The hook (102) has an opening (300) at the hook end from top to bottom, a limiting groove (301) at the bottom of the opening (300), and a second electric push rod (302) at the top of the opening (300).
6. A self-locking anti-disengagement mechanism for a crane as described in claim 5, characterized in that: The bottom of the telescopic end of the second electric actuator (302) is provided with a limiting rod (304), and the bottom end of the limiting rod (304) fits into the limiting groove.
7. A self-locking anti-disengagement mechanism for a crane as described in claim 6, characterized in that: The second electric actuator (302) has a support frame (303) at the top of its drive end. The support frame (303) is U-shaped and is connected to the top of the outer wall of the pulley frame (101).