Safe chain block

Abstract

The utility model discloses a safe chain block, and relates to the technical field of chain blocks. The safety chain block comprises a chain block body, a chain wheel used for installing a limiting module is welded to the chain block body, the lower end of the chain block body is connected with a hook through a connecting base welded to the chain block body, the hook is provided with an anti-falling module, and the limiting module comprises a notch formed in the chain wheel. The chain wheel is in limiting connection with a chain used for hanging through a notch, limiting sliding openings are formed in the circle centers of the two end faces of the chain wheel in an array mode, the chain wheel is slidably connected with an expansion sliding block through the limiting sliding openings, and a hydraulic rod with the other end provided with a connecting block is installed on the expansion sliding block in a limiting mode. According to the chain block, the expansion sliding block is matched with the hydraulic rod connected with the connecting block to push and slide in the limiting sliding opening, then the chain is limited and clamped by the clamping plate at the bottom of the embedded arc plate on the expansion sliding block, the stability of the chain in the hoisting process is guaranteed, and finally the safety of the chain block is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hand chain hoists, in particular to a safety hand chain hoist. Background Art

[0002] Hand chain hoist is also called fairy hoist, chain hoist, chain hoist, jinbulu, manual hoist. It is a manual lifting machinery that is simple to use and easy to carry. It is also called chain hoist or chain hoist. It is suitable for short-distance lifting of small equipment and goods. The lifting weight generally does not exceed 10T, the maximum can reach 20T, and the lifting height generally does not exceed 6m. The shell material of hand chain hoist is high-quality alloy steel, which is strong and wear-resistant and has high safety performance. When the hand chain hoist lifts the heavy object upward, the manual chain is pulled clockwise and the hand chain wheel rotates. When descending, the hand chain is pulled counterclockwise. The brake seat is separated from the brake pad, the ratchet is stationary under the action of the pawl, and the five-tooth long shaft drives the lifting sprocket to run in the opposite direction, so as to steadily lower the heavy object. The hand chain hoist generally adopts a ratchet friction plate one-way brake, which can brake itself under load. The pawl engages with the ratchet under the action of the spring to make the brake work safely.

[0003] At present, there are certain safety hazards in the use of hand chain hoists. When the hoist chain suddenly drops to the bottom, the sprocket and the nut are easily locked, causing brake failure and creating safety hazards. At the same time, the structure of the hook lacks a certain degree of fixity, which makes it easy for the hook and the cargo to fall off, causing damage to the cargo, which is inconvenient to use.

[0004] For example, a high-security hand chain hoist disclosed in Chinese patent publication number CN217894981U has a sprocket in the middle of the front end of the hand chain hoist, and a chain is arranged on the sprocket, and then a stop washer and a metal part are used for limiting, thereby preventing the sprocket and the nut from being locked when the hoist chain drops to the bottom, eliminating safety hazards. At the same time, a groove is arranged on the hook, so that one end of the resisting plate is engaged with the corresponding groove, and a fixing bolt passes through the corresponding through hole and is threadedly connected with a nut, so that the goods will not fall off after being hung on the hook, and the goods will not fall and be damaged, making it more convenient to use.

[0005] However, during the process of lifting the goods by the above-mentioned device, the sprocket lacks a corresponding limiting mechanism during the suspension process. When the goods shake in a suspended state, the chain can easily cause shaking or slight movement in the notch of the sprocket, resulting in difficulty in hovering the goods in the air or movement during the hovering process. The stop washer of the above-mentioned device is difficult to limit directly with the chain, making lifting docking difficult and the safety weak. Utility Model Content

[0006] In view of the deficiencies in the prior art, the utility model provides a safety hand chain hoist, which solves the problems raised in the above-mentioned background technology.

[0007] To achieve the above purpose, the utility model is implemented through the following technical solutions: a safety hand chain hoist, including a hand chain hoist body, a sprocket for installing a limit module is welded on the hand chain hoist body, a hook is connected to the lower end of the hand chain hoist body through a connecting seat welded thereon, and an anti-drop module is arranged on the hook;

[0008] The limiting module includes a recess opened on the sprocket, and the sprocket is limitedly connected to the chain for suspension through the recess, and the limiting slides are arranged in a circle center array at the end faces of both ends of the sprocket, and the sprocket is slidably connected to an expansion slider through the limiting slide, and a hydraulic rod with a connecting block installed on the other end of the expansion slider; the chain is sleeved in the recess of the sprocket, because the chain in the recess will shake or slightly shift to the side wall of the sprocket during the suspension process, then in response to the above situation, in this embodiment, the expansion slider is pushed by the hydraulic rod connected to the connecting block, slides in the limiting slide, and then the clamping plate at the bottom of the embedded arc plate on the expansion slider limits and clamps the chain, thereby ensuring the stability of the chain during the lifting process, and ultimately improving the safety of the hand winch.

[0009] A further improvement of the technical solution of the utility model lies in that: the connecting block is welded to the sprocket, the same interlocking arc plate is welded on both sides of the recess of adjacent expansion sliders, and a clamping plate matching the chain connecting port is welded at the end face of the interlocking arc plate close to the chain; the clamping plate of the interlocking arc plate is interlocked and clamped with the connecting port of the chain, or the clamping plate of the interlocking arc plate is fitted to the chain, both of which can achieve the limitation of the chain on the sprocket.

[0010] A further improvement of the technical solution of the utility model is that one end of the expansion slider is located in a slide groove in the main body of the hand hoist, and the expansion slider is slidably connected to the main body of the hand hoist through the slide groove, and the sum of the angles between adjacent expansion sliders is three hundred and sixty degrees; in order to ensure the stable sliding of the expansion slider in the main body of the hand hoist, a movable slide groove of the expansion slider is provided, and further, the number of expansion sliders can be set in multiple ways according to actual conditions.

[0011] A further improvement of the technical solution of the utility model is that the anti-drop module includes an opening opened at the bottom of the hook, an electric push rod with the other end connected to the propulsion gasket is fixedly installed in the opening, and a limiting gasket is slidably installed in the arc area of ​​the hook.

[0012] A further improvement of the technical solution of the utility model is that a fixed block with a hinge shaft installed inside is welded to the outer wall of the propulsion gasket, a connecting rod with the other end connected to the fixed shaft is hinged on the hinge shaft, the fixed shaft is limitedly installed in an extension block welded to the outer wall of the limiting gasket, and the limiting gasket slides on the hook.

[0013] A further improvement of the technical solution of the utility model is that: the arc-shaped side wall of the hook is provided with a positioning opening for inserting the positioning rod, and the positioning rod passes through the limiting gasket and is limitedly inserted into the positioning opening in the hook.

[0014] Beneficial Effects

[0015] The utility model provides a safe hand chain hoist. Compared with the prior art, it has the following beneficial effects:

[0016] 1. The safety hand chain hoist is pushed forward by the hydraulic rod connected to the expansion slider and the connecting block, slides in the limit sliding mouth, and then the clamping plate at the bottom of the embedded arc plate on the expansion slider clamps the chain to ensure the stability of the chain during the lifting process, and finally improves the safety of the hand chain hoist.

[0017] 2. The safety hand chain hoist completes the traction of the connecting rod by pushing the gasket, the hinge shaft and the fixed block thereon. Finally, the connecting rod completes the sliding of the limiting gasket on the hook. At this time, the limiting area formed by the limiting gasket and the arc-shaped side wall of the hook changes, completing the lifting of different goods. The positioning port and the positioning rod are set to prevent the goods from falling off the hook. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a front view of the utility model;

[0020] Figure 3 It is a schematic diagram of the limit module of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the anti-drop module of the utility model.

[0022] In the figure: 1. Hand chain hoist body; 2. Sprocket; 3. Connecting seat; 4. Hook;

[0023] 201, notch; 202, chain; 203, limit slide; 204, expansion slider; 205, connection block; 206, hydraulic rod;

[0024] 204a, interlocking arc plate; 204b, clamping plate; 204c, sliding groove;

[0025] 401, opening; 402, pushing gasket; 403, electric push rod; 404, limiting gasket; 405, positioning rod; 406, positioning port;

[0026] 402a, hinge shaft; 402b, fixed block; 402c, fixed shaft; 402d, connecting rod; 402e, extension block. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] Reference Figure 1-Figure 4 , this utility model provides 3 technical solutions:

[0029] Embodiment 1:

[0030] A safety hand chain hoist comprises a hand chain hoist body 1, a sprocket 2 for installing a limit module is welded on the hand chain hoist body 1, a hook 4 is connected to the lower end of the hand chain hoist body 1 through a connecting seat 3 welded thereon, and an anti-drop module is arranged on the hook 4;

[0031] The limiting module includes a notch 20101 opened on the sprocket 2, and the sprocket 2 is limitedly connected to the chain 202 for suspension through the notch 201. The limiting slides 203 are arranged in a circle center array at the end faces of both ends of the sprocket 2. The sprocket 2 is slidably connected to an expansion slider 204 through the limiting slide 203. The expansion slider 204 is limitedly installed with a hydraulic rod 206 with a connecting block 205 installed at the other end.

[0032] In the present embodiment, the chain 202 is sleeved in the recess 20101 of the sprocket 2. Since the chain 202 in the recess 20101 may shake or slightly shift to the side wall of the sprocket 2 during the suspension process, in response to the above situation, in the present embodiment, the expansion slider 204 is pushed forward by the hydraulic rod 206 connected to the connecting block 205, slides in the limiting slide 203, and then the clamping plate 204b at the bottom of the embedded arc plate 204a on the expansion slider 204 clamps the chain 202 to ensure the stability of the chain 202 during the lifting process, thereby ultimately improving the safety of the hand winch.

[0033] The connecting block 205 is welded to the sprocket 2, and the adjacent expansion sliders 204 are welded with the same interlocking arc plate 204a on both sides of the notch 20101, and the end face of the interlocking arc plate 204a close to the chain 202 is welded with a clamping plate 204b matching the connecting port of the chain 202.

[0034] The clamping plate 204b of the embedded arc plate 204a is embedded and clamped with the connecting port of the chain 202, or the clamping plate 204b of the embedded arc plate 204a is fitted to the chain 202, both of which can achieve the limitation of the chain 202 on the sprocket 2.

[0035] One end of the expansion slider 204 is located in the slide groove 204c in the hand chain hoist body 1, and the expansion slider 204 is slidably connected to the hand chain hoist body 1 through the slide groove 204c, and the sum of the angles of adjacent expansion sliders 204 is 360 degrees. In order to ensure the stable sliding of the expansion slider 204 in the hand chain hoist body 1, a movable slide groove 204c of the expansion slider 204 is provided, and further, the number of expansion sliders 204 can be set in various ways according to actual conditions.

[0036] Embodiment 2:

[0037] Based on Example 1:

[0038] The anti-drop module includes an opening 401 opened at the bottom of the hook 4, an electric push rod 403 whose other end is connected to a push pad 402 is fixedly installed in the opening 401, and a limit pad 404 is slidably installed in the arc area of ​​the hook 4.

[0039] A fixed block 402b with a hinge shaft 402a installed inside is welded to the outer wall of the pushing gasket 402, and a connecting rod 402d with the other end connected to the fixed shaft 402c is hinged on the hinge shaft 402a. The fixed shaft 402c is limitedly installed in an extension block 402e welded to the outer wall of the limiting gasket 404, and the limiting gasket 404 slides on the hook 4.

[0040] In this embodiment, after the propulsion gasket 402 is raised and lowered in height by the electric push rod 403, the propulsion gasket 402 completes the traction of the connecting rod 402d through the hinge shaft 402a and the fixed block 402b thereon, and finally the connecting rod 402d completes the sliding of the limiting gasket 404 on the hook 4. At this time, the limiting area formed by the limiting gasket 404 and the arc-shaped side wall of the hook 4 changes, thereby completing the lifting of different goods.

[0041] The arc-shaped side wall of the hook 4 is provided with a positioning hole 406 for inserting the positioning rod 405 . The positioning rod 405 passes through the limiting gasket 404 and is limitedly inserted into the positioning hole 406 in the hook 4 .

[0042] In the above, the limiting area formed by the limiting gasket 404 and the arc-shaped side wall of the hook 4 needs to be limited and clamped during hoisting, so the positioning port 406 and the positioning rod 405 are provided to prevent the cargo from falling off the hook 4.

[0043] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A safety hand chain hoist, comprising a hand chain hoist body (1), characterized in that: A sprocket (2) for installing a limit module is welded on the main body (1) of the hand chain hoist, and a hook (4) is connected to the lower end of the main body (1) of the hand chain hoist via a connecting seat (3) welded thereon, and an anti-drop module is arranged on the hook (4); The limiting module comprises a notch (201) formed on the sprocket (2); the sprocket (2) is limit-connected to a chain (202) for suspension via the notch (201); limiting sliding openings (203) are arranged in a circle center array at both ends of the end surface of the sprocket (2); the sprocket (2) is slidably connected to an expansion slider (204) via the limiting sliding opening (203); a hydraulic rod (206) having a connection block (205) mounted at the other end of the expansion slider (204) is limit-mounted.

2. A safety hand chain hoist according to claim 1, characterized in that: The connecting block (205) is welded to the sprocket (2), and the same embedded arc plate (204a) is welded on both sides of the recess (201) of the adjacent expansion slider (204), and a clamping plate (204b) matching the connecting port of the chain (202) is welded on the end surface of the embedded arc plate (204a) close to the chain (202).

3. A safety hand chain hoist according to claim 1, characterized in that: One end of the expansion slider (204) is located in a slide groove (204c) in the hand chain hoist body (1), and the expansion slider (204) is slidably connected to the hand chain hoist body (1) via the slide groove (204c), and the total angle between adjacent expansion sliders (204) is three hundred and sixty degrees.

4. A safety hand chain hoist according to claim 1, characterized in that: The anti-drop module comprises an opening (401) formed at the bottom of the hook (4), an electric push rod (403) having the other end connected to a propulsion gasket (402) being fixedly installed in the opening (401), and a limiting gasket (404) being slidably installed in the arc region of the hook (4).

5. A safety hand chain hoist according to claim 4, characterized in that: A fixed block (402b) with a hinge shaft (402a) installed therein is welded on the outer wall of the propulsion gasket (402); a connecting rod (402d) with the other end connected to the fixed shaft (402c) is hinged on the hinge shaft (402a); the fixed shaft (402c) is limitedly installed in an extension block (402e) welded on the outer wall of the limiting gasket (404); and the limiting gasket (404) slides on the hook (4).

6. A safety hand chain hoist according to claim 5, characterized in that: The arc-shaped side wall of the hook (4) is provided with a positioning opening (406) for inserting the positioning rod (405), and the positioning rod (405) passes through the limiting gasket (404) and is limitedly inserted into the positioning opening (406) in the hook (4).

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