Anti-locking chain block

Abstract

The utility model relates to the field of chain blocks, in particular to an anti-locking chain block which comprises a block body, one side of the block body is provided with a protective shell, and the inner side of the protective shell is rotationally connected with a hand chain wheel. The anti-shake mechanism is installed at the lower end of the protective shell, and the surface of the anti-shake mechanism extends to the inner bottom wall of the protective shell; wherein the anti-shake mechanism comprises two shake relieving assemblies arranged at the lower end of the protective shell, and the two shake relieving assemblies are stacked and distributed along the central axis of the protective shell; according to the device, under the condition that the chain shakes, the shaking range of the chain is restrained through the rubber buffer pipe, the hard rubber reinforcing ribs and the positioning strips are matched, the positioning effect on the rubber buffer pipe is enhanced, the relieving effect of the rubber buffer pipe on the shaking of the chain is enhanced, and the situation that the hand-pulling chain wheel and the chain are in contact and stuck due to excessive shaking of the chain is reduced; and the use smoothness of the device is ensured.

Description

Technical Field

[0001] The utility model relates to the field of chain hoists, and particularly relates to a chain hoist that prevents jamming. Background Art

[0002] A chain hoist is an upgraded pulley that fully inherits the advantages of a pulley. The chain hoist saves effort by using the principle of mechanics. By manually driving the hand chain, traction force is generated. Using the gear transmission method, a small gear drives a large gear to transmit the amplified torque, so as to drive the lifting chain to complete the lifting of goods.

[0003] After searching the prior art for "a chain hoist that prevents jamming", the publication number is "CN217578128U". This device is convenient for removing the block for replacement. However, when the operator manually operates, since pulling the chain will cause the chain to shake, the shaking chain will cause misalignment when contacting the internal hand chain wheel, resulting in the hoist jamming and affecting the smooth use of the chain hoist.

[0004] Therefore, a chain hoist that prevents jamming is proposed to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide a chain hoist that prevents jamming to solve the above problems, and improves the situation that pulling the chain will cause the chain to shake, and the shaking chain will cause misalignment when contacting the internal hand chain wheel, resulting in the hoist jamming and affecting the smooth use of the chain hoist.

[0006] The utility model realizes the above purpose through the following technical solutions. A chain hoist that prevents jamming includes: a hoist body, a protective shell is installed on one side of the hoist body, and a hand chain wheel is rotatably connected to the inner side of the protective shell; an anti-shake mechanism, the anti-shake mechanism is installed at the lower end of the protective shell, and the surface of the anti-shake mechanism extends to the inner bottom wall of the protective shell; wherein, the anti-shake mechanism includes two jitter mitigation components arranged at the lower end of the protective shell, the two jitter mitigation components are distributed symmetrically along the central axis of the protective shell, and a chain guiding component is arranged between the two jitter mitigation components, and the chain guiding component is installed on the inner bottom wall of the protective shell.

[0007] Preferably, the jitter mitigation component includes a metal guide tube fixedly connected to the lower end of the protective shell. The upper end of the metal guide tube communicates with the surface of the protective shell. The lower end of the metal guide tube is fixedly connected with a rubber buffer tube. The lower end of the metal guide tube communicates with the upper end of the rubber buffer tube. Two hard rubber reinforcing ribs are respectively fixedly connected to both sides of the rubber buffer tube. A plurality of brushes are fixedly connected to the inner wall of the metal guide tube. When the operator pulls the chain during the use of the device, the rubber buffer tube is provided to reduce the occurrence of chain jitter during the pulling process. At the same time, the hard rubber reinforcing ribs are provided to improve the rubber buffer tube's ability to mitigate the jitter during the chain pulling process. The brushes assist in cleaning the impurities on the surface of the chain during the pulling process to avoid jamming.

[0008] Preferably, the chain guiding component includes a guiding frame fixedly connected to the inner bottom wall of the protective shell. The guiding frame is located between the two jitter mitigation components. A circular bin is fixedly connected to the middle of the upper end of the guiding frame. A sheave is rotatably connected to the inner top wall of the circular bin. Two steel wire ropes are wound around the surface of the sheave. The other ends of the steel wire ropes are fixedly connected with steel wire coils. When the sheave rotates, it drives the two steel wire ropes to move towards the circular bin. At this time, through the steel wire coils, the chain is brought closer to the surface of the hand chain wheel, reducing the instability of the connection between the hand-pulled chain and the hand chain wheel.

[0009] Preferably, two clamping seats are fixedly connected to the surface of the metal guide tube near the hard rubber reinforcing ribs. A clamping block is clamped inside the clamping seats.

[0010] Preferably, a positioning rope is fixedly connected to the surface of the steel wire coil. The positioning rope is fixedly connected to the inner wall of the protective shell. Two elastic tapered tubes are sleeved on the surface of the steel wire coil. The elastic tapered tubes are arranged in a conical shape, and the narrow ends of the elastic tapered tubes face towards the circular bin direction. Thus, the chain passes through the inside of the steel wire coil and contacts the surfaces of the two elastic tapered tubes. At this time, the narrow ends of the elastic tapered tubes are relatively loose. Under the action of the two elastic tapered tubes, the chain is brought closer to the surface of the hand chain wheel, ensuring the connection stability between the hand chain wheel and the hand-pulled chain and reducing the occurrence of jamming.

[0011] Preferably, a coil spring is fixedly connected to the inner wall of the circular bin. The other end of the coil spring is fixedly connected to the surface of the sheave. With the setting of the coil spring, when the chain cannot pass through the steel wire coil smoothly, the chain can drive the elastic tapered tubes to deflect at a certain angle. At this time, the steel wire rope is pulled to make the sheave rotate. Then the chain passes through, and the coil spring resets the sheave to maintain contact with the chain.

[0012] The beneficial effects of the present utility model are:

[0013] 1. The above anti-lock hand chain hoist can relieve the chain shaking during the operation of the hand chain under the action of the shaking relief component. The device forms a constraint on the shaking range of the chain through the rubber buffer tube in the case of chain shaking, and cooperates with the hard rubber reinforcing rib and the positioning strip to enhance the positioning effect of the rubber buffer tube, enhance the relief effect of the rubber buffer tube on the chain shaking, reduce the situation that the chain shakes too much and causes the hand chain wheel and the chain to be stuck, and ensure the smooth use of the device.

[0014] 2. By setting the chain guiding component, it can form an auxiliary guiding effect on the chain under the action of the chain guiding component. The elastic tapered tube of the device is set to be conical, and the narrow end of the elastic tapered tube faces the direction of the round bin. The chain passes through the inside of the wire coil and contacts the surfaces of the two elastic tapered tubes. At this time, the narrow end of the elastic tapered tube is relatively loose. The chain approaches the surface of the hand chain wheel under the action of the two elastic tapered tubes, ensuring the connection stability between the hand chain wheel and the hand chain and reducing the occurrence of jamming. Description of the Drawings

[0015] Figure 1 is a structural schematic diagram of the present invention;

[0016] Figure 2 is an exploded structural schematic diagram of the anti-shaking mechanism of the present invention;

[0017] Figure 3 is an exploded cross-sectional view of the shaking relief component of the present invention;

[0018] Figure 4 is a structural schematic diagram of the chain guiding component of the present invention;

[0019] Figure 5 is a partial cross-sectional view of the chain guiding component of the present invention.

[0020] In the figure: 1. Hoist body; 2. Protective shell; 21. Hand chain wheel; 3. Anti-shaking mechanism; 31. Shaking relief component; 311. Metal guiding tube; 312. Rubber buffer tube; 313. Hard rubber reinforcing rib; 314. Card seat; 315. Block; 316. Positioning strip; 317. Brush; 32. Chain guiding component; 321. Guiding frame; 322. Round bin; 323. Positioning rope; 324. Wire coil; 325. Elastic tapered tube; 326. Steel wire rope; 327. Groove wheel; 328. Coil spring. Detailed Description of the Invention

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0022] During specific implementation: As Figures 1-5 shown, an anti-lock hand chain hoist includes: a hoist body 1, a protective shell 2 is installed on one side of the hoist body 1, and a hand chain wheel 21 is rotatably connected to the inner side of the protective shell 2; an anti-shake mechanism 3, the anti-shake mechanism 3 is installed at the lower end of the protective shell 2, and the surface of the anti-shake mechanism 3 extends to the inner bottom wall of the protective shell 2; wherein, the anti-shake mechanism 3 includes two jitter mitigation components 31 arranged at the lower end of the protective shell 2, the two jitter mitigation components 31 are distributed symmetrically along the central axis of the protective shell 2, and a chain guiding component 32 is arranged between the two jitter mitigation components 31, and the chain guiding component 32 is installed on the inner bottom wall of the protective shell 2;

[0023] As Figure 1 、 Figure 2 and Figure 3 shown, the jitter mitigation component 31 includes a metal guiding tube 311 fixedly connected to the lower end of the protective shell 2, the upper end of the metal guiding tube 311 is communicated with the surface of the protective shell 2, the lower end of the metal guiding tube 311 is fixedly connected with a rubber buffer tube 312, the lower end of the metal guiding tube 311 is communicated with the upper end of the rubber buffer tube 312, two hard rubber reinforcing ribs 313 are respectively fixedly connected to both sides of the rubber buffer tube 312, a plurality of brushes 317 are fixedly connected to the inner wall of the metal guiding tube 311, two card seats 314 are fixedly connected to the surface of the metal guiding tube 311 close to the hard rubber reinforcing rib 313, a card block 315 is clamped in the inner wall of the card seat 314, a positioning strip 316 is fixedly connected to the side of the card block 315 away from the card seat 314, and the lower end of the positioning strip 316 penetrates to one side of the hard rubber reinforcing rib 313 and is fixedly connected to the surface of the hard rubber reinforcing rib 313;

[0024] During the use of the device, when the operator pulls the chain, the rubber buffer tube 312 provided reduces the occurrence of chain jitter during the pulling process. At the same time, the hard rubber reinforcing ribs 313 provided improve the rubber buffer tube 312's ability to relieve the jitter during the chain pulling process. The brushes 317 assist in cleaning the impurities on the surface of the chain during the pulling process to avoid the occurrence of jamming. Among them, the card seat 314 forms a stable positioning effect on the card block 315. The card block 315 further enhances the positioning effect of the hard rubber reinforcing rib 313 on the rubber buffer tube 312 through the positioning strip 316, improving the rubber buffer tube 312's ability to relieve chain jitter;

[0025] AsFigure 2 , Figure 4 and Figure 5 As shown in Figure 2 , Figure 4 and Figure 5 , the chain guiding assembly 32 includes a guiding frame 321 fixedly connected to the inner bottom wall of the protective shell 2. The guiding frame 321 is located between two jitter mitigation assemblies 31. In the middle of the upper end of the guiding frame 321, a circular bin 322 is fixedly connected. The inner top wall of the circular bin 322 is rotatably connected with a grooved pulley 327. Two steel wire ropes 326 are wound on the surface of the grooved pulley 327. The other ends of the steel wire ropes 326 are fixedly connected with a steel wire coil 324. A positioning rope 323 is fixedly connected to the surface of the steel wire coil 324. The positioning rope 323 is fixedly connected to the inner wall of the protective shell 2. Two elastic tapered tubes 325 are sleeved on the surface of the steel wire coil 324. A winding spring 328 is fixedly connected to the inner wall of the circular bin 322. The other end of the winding spring 328 is fixedly connected to the surface of the grooved pulley 327;

[0026] When the grooved pulley 327 rotates, it drives the two steel wire ropes 326 to move towards the circular bin 322. At this time, the chain is brought closer to the surface of the hand chain wheel 21 through the steel wire coil 324, reducing the unstable connection between the hand-pulled chain and the hand chain wheel 21. The elastic tapered tube 325 is set in a conical shape, and the narrow end of the elastic tapered tube 325 faces the direction of the circular bin 322. The chain passes through the inside of the steel wire coil 324 and contacts the surfaces of the two elastic tapered tubes 325. At this time, the narrow end of the elastic tapered tube 325 is relatively loose. Under the action of the two elastic tapered tubes 325, the chain is brought closer to the surface of the hand chain wheel 21, ensuring the connection stability between the hand chain wheel 21 and the hand-pulled chain and reducing the occurrence of jamming. Through the setting of the winding spring 328, when the chain passes through the steel wire coil 324 smoothly, the chain can drive the elastic tapered tube 325 to deflect by a certain angle. At this time, the steel wire rope 326 is pulled to make the grooved pulley 327 rotate. After the chain passes through, the grooved pulley 327 is reset by the winding spring 328 to maintain the contact with the chain.

[0027] When the utility model is in use, the operator pulls the chain by hand. The rubber buffer tube 312 reduces the jitter of the chain during the hand-pulling process. The hard rubber reinforcing rib 313 improves the ability of the rubber buffer tube 312 to mitigate the chain jitter. The brush 317 assists in cleaning the impurities on the surface of the chain during the pulling process. The clamping seat 314 forms a stable positioning for the clamping block 315. The clamping block 315 further enhances the positioning effect of the hard rubber reinforcing rib 313 on the rubber buffer tube 312 through the positioning strip 316, improving the situation of the rubber buffer tube 312 mitigating the chain jitter. The chain passes through the inside of the steel wire coil 324 and contacts the surfaces of the two elastic tapered tubes 325. The narrow ends of the elastic tapered tubes 325 are relatively loose. Under the action of the two elastic tapered tubes 325, the chain is brought closer to the surface of the hand chain wheel 21, ensuring the connection stability between the hand chain wheel 21 and the hand-pulled chain and reducing the occurrence of jamming.

[0028] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment contains only an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A hand chain hoist with anti-lock function, characterized in that, Comprising: A gourd body (1), on one side of the gourd body (1) is installed a protective shell (2), and a hand zipper wheel (21) is rotatably connected to the inner side of the protective shell (2); An anti-shake mechanism (3), the anti-shake mechanism (3) is installed at the lower end of the protective shell (2), and the surface of the anti-shake mechanism (3) extends to the inner bottom wall of the protective shell (2); Among them, the anti-shake mechanism (3) includes two jitter mitigation components (31) arranged at the lower end of the protective shell (2), the two jitter mitigation components (31) are symmetrically distributed along the central axis of the protective shell (2), and a chain guiding component (32) is arranged between the two jitter mitigation components (31), and the chain guiding component (32) is installed on the inner bottom wall of the protective shell (2).

2. The anti-blocking chain block according to claim 1, characterized in that: The jitter mitigation component (31) includes a metal guiding tube (311) fixedly connected to the lower end of the protective shell (2), the upper end of the metal guiding tube (311) is communicated with the surface of the protective shell (2), the lower end of the metal guiding tube (311) is fixedly connected with a rubber buffer tube (312), the lower end of the metal guiding tube (311) is communicated with the upper end of the rubber buffer tube (312), two hard rubber reinforcing ribs (313) are respectively fixedly connected to both sides of the rubber buffer tube (312), and a plurality of brushes (317) are fixedly connected to the inner wall of the metal guiding tube (311).

3. The anti-blocking chain block according to claim 1, characterized in that: The chain guiding component (32) includes a guiding frame (321) fixedly connected to the inner bottom wall of the protective shell (2), the guiding frame (321) is located between the two jitter mitigation components (31), a circular bin (322) is fixedly connected to the middle of the upper end of the guiding frame (321), a grooved wheel (327) is rotatably connected to the inner top wall of the circular bin (322), two steel wire ropes (326) are wound around the surface of the grooved wheel (327), and the other end of the steel wire rope (326) is fixedly connected with a steel wire coil (324).

4. The anti-blocking chain hoist according to claim 2, characterized in that: Two clamping seats (314) are fixedly connected to the surface of the metal guiding tube (311) close to the hard rubber reinforcing rib (313), and a clamping block (315) is clamped in the inner wall of the clamping seat (314).

5. The anti-blocking chain block according to claim 4, characterized in that: One side of the clamping block (315) away from the clamping seat (314) is fixedly connected with a positioning strip (316), and the lower end of the positioning strip (316) penetrates to one side of the hard rubber reinforcing rib (313) and is fixedly connected with the surface of the hard rubber reinforcing rib (313).

6. The anti-lock hand chain hoist according to claim 3, characterized in that: A positioning rope (323) is fixedly connected to the surface of the steel wire coil (324), the positioning rope (323) is fixedly connected to the inner wall of the protective shell (2), and two elastic tapered tubes (325) are sleeved on the surface of the steel wire coil (324).

7. The anti-blocking chain hoist according to claim 6, wherein: A coil spring (328) is fixedly connected to the inner wall of the circular bin (322), and the other end of the coil spring (328) is fixedly connected to the surface of the grooved wheel (327).

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