WO2015042936A1

WO2015042936A1 - Manual hoist

Info

Publication number: WO2015042936A1
Application number: PCT/CN2013/084685
Authority: WO
Inventors: 高则行; 于公满; 李建文; 李维元
Original assignee: 高则行
Priority date: 2013-09-30
Filing date: 2013-09-30
Publication date: 2015-04-02

Abstract

Provided is a manual hoist (1), comprising: a manual chain wheel (2), a manual chain (3) borne on the manual chain wheel (2) and used for driving the manual chain wheel (2), and a gear shaft (4) driven by the manual chain wheel (2). The manual hoist (1) further comprises: a first load-lifting chain wheel (5) sheathed on the gear shaft (4) and rotating synchronously with the gear shaft (4); a gear set having a driving gear (6) and a driven gear (7), the driving gear (6) being sheathed on the gear shaft (4) and rotating synchronously with the gear shaft (4), and the driven gear (7) driving the rotation of a driving shaft (8); a second load-lifting chain wheel (9) sheathed on the driving shaft (8) and rotating synchronously with the driving shaft (8); an endless load-lifting chain (10) which passes around the first load-lifting chain wheel (5) in a clockwise or counter-clockwise winding direction with a buffer section (11) being left, and then passes around the second load-lifting chain wheel (9) in a winding direction opposite to the first load-lifting chain wheel (5) with a load-bearing section (12) being left, and then goes back to the first load-lifting chain wheel (5). The present manual hoist significantly increases the speed at which heavy goods are lifted, and is especially suitable for use with heavy goods requiring long-distance lifting, thereby improving load-lifting efficiency of the manual hoist.

Description

Chain hoist

The invention relates to a chain hoist. Background technique

Hand chain hoists, also known as "chain hoists" or "inverted chains", are portable cranes that are easy to carry. The lifting capacity is generally 0.5 to 50 tons, basically no more than 100 tons, and the lifting height is usually within 30 meters. . It is suitable for the production and construction of factories, miners, agriculture, electricity, buildings, cargo lifting, vehicle loading and unloading, etc., especially for open air and no power supply operations, it has more important functions. In addition to being used alone, the chain hoist can be used with all types of hand-drawn monorails to form a hand-lifting transport trolley, which can realize the function of lifting heavy objects from left to right. It is suitable for monorail overhead transportation, single girder overhead crane and cantilever type. On the crane.

The basic structure of the chain hoist includes: lifting device, manual chain, bracelet wheel and so on. When the chain hoist lifts the weight upwards, the manual chain and the hand wheel are rotated, and the rotation is transmitted to the lifting device through a common gear shaft. The lifting device includes, in addition to the gear shaft, a hoisting sprocket fixed to the gear shaft and a hoisting chain for carrying a weight. The keyway sprocket enables the hoisting sprocket to rotate synchronously with the gear shaft, thereby driving the hoisting chain, thereby smoothly lifting the weight. When the gear is lowered, the manual chain is operated in the opposite direction, so that the gear shaft drives the hoisting sprocket to run in the opposite direction, thereby smoothly lowering the weight.

For the chain hoist, the commonly used lifting device includes a lifting sprocket and a lifting chain, and the lifting chain is hoisted at the same speed as the hand wheel. However, this is obviously a countervailing and time-consuming defect for the case where the lifting height is high, which further complicates the operation of the chain and the excessive consumption of manpower.

Thus, it is apparent that an improved chain hoist is urgently needed to solve the above technical problems or at least to improve the current use situation in the art. Summary of the invention

Therefore, according to the present invention, a chain hoist is provided, which comprises: a hand wheel, carried on The hand-drawn hoist of the invention further includes: a first heavy sprocket, the first hoisting sprocket is sleeved on the gear shaft and synchronously rotates with the gear shaft; a gear set having a driving wheel and a driven wheel, the driving wheel sleeve On the gear shaft and synchronously rotating with the gear shaft, the driven wheel drives the transmission shaft to rotate; the second lifting sprocket, the second lifting sprocket is sleeved on the transmission shaft and synchronized with the transmission shaft Rotating; an endless lifting chain, the hoisting chain leaving a section of the buffer after bypassing the first lifting sprocket in a clockwise or counterclockwise winding direction, and then winding in the opposite direction to the first lifting sprocket Bypassing the second hoisting sprocket, returning to the first hoisting sprocket after leaving the load section. Through the setting of the gear set, the first hoisting sprocket and the first hoisting sprocket have a certain speed ratio, thereby greatly improving the speed of lifting the weight with the chain hoist under the premise of the rotation speed of the bracelet wheel. It is especially suitable for heavy objects that need long distance lifting, which improves the lifting efficiency of the chain hoist.

According to a preferred embodiment of the present invention, the first and second lifting sprocket wheels may be disposed between the hand wheel and the gear set. According to another preferred embodiment of the present invention, the gear set may also be disposed between the hand wheel and the first and second hoisting sprocket wheels. The actual layout, such as the weight of the lifting weight, the weight ratio of the gear set and the two lifting sprocket, and the size of the space inside the casing of the entire chain hoist, can be selected. Preferably, the difference between the number of teeth of the driving wheel and the driven wheel of the gear set is one.

According to a preferred embodiment of the present invention, the gear shaft and the transmission shaft are rotatably supported on the housing of the chain hoist, respectively. For this purpose, a support seat can be integrally formed on the inner wall of the casing of the chain hoist for supporting the gear shaft and the transmission shaft so that the rotational movement of the gear shaft and the transmission shaft is not disturbed.

According to a preferred embodiment of the present invention, a hook for suspending the chain hoist is provided above the chain hoist. This enables the mounting or fixing of the chain hoist and other equipment, and is easy to disassemble and replace.

According to a preferred embodiment of the invention, the load carrying section of the hoisting chain is provided with a hook for hanging a heavy object.

Instead of connecting the components of the heavy object, DRAWINGS

The invention will now be described, by way of example only, with reference to the accompanying drawings in which FIG.

Fig. 2 shows a schematic view of another embodiment of the chain hoist of the present invention; and Fig. 3 shows a schematic view of an embodiment of the hoisting chain of the present invention wound on two hoisting sprocket wheels. detailed description

Figure 1 shows a schematic view of one embodiment of the chain hoist of the present invention. The chain hoist 1 of the present invention comprises: a hand wheel 2, a manual chain 3 carried on the hand wheel 2 for driving the hand wheel 2, and a gear shaft driven by the hand wheel 2 (only the axis position is shown by a broken line) 4. A first hoisting sprocket 5 is disposed on the gear shaft 4, and the first hoisting sprocket 5 rotates synchronously with the gear shaft 4. The chain hoist of the present invention is further provided with a gear set having a driving wheel 6 and a driven wheel 7; the driving wheel 6 is sleeved on the gear shaft 4 and rotates synchronously with the gear shaft, and the driven wheel 7 drives the transmission shaft (only The axis position is shown by a broken line. 8 Rotate. A second hoisting sprocket 9 is disposed on the drive shaft 8, and the second hoisting sprocket 9 rotates synchronously with the drive shaft 8. The hoisting chain 10 is an endless chain, and the hoisting chain 10 bypasses the winding direction of clockwise (see Fig. 1-3) or counterclockwise (not shown) as seen from the side of the side of the hand sprocket 2 After the heavy sprocket 5 is left together, a long enough buffer section 1 1 is left, and then the second lifting sprocket 9 is wound in the winding direction opposite to the first lifting sprocket 5, after leaving the load section 12 Returning to the first lifting sprocket 5, thereby forming an endless chain.

Here, the rotational speed ratio of the first heavy sprocket 5 and the second lifting sprocket 9 depends on the gear ratio of the gear set that is transmitted between them. Here, it is preferable that the difference between the number of teeth of the driving wheel 6 and the driven wheel 7 of the gear set is 1, for example, when the number of teeth of the driving wheel is 28, the number of teeth of the driven wheel is 27. The first heavy sprocket 5 and the second lifting sprocket 9 may be the same or different sized lifting sprocket as long as the load carrying the weight can be satisfied.

In the embodiment of Fig. 1, the first heavy sprocket 5 and the second lifting sprocket 9 are disposed between the hand wheel 2 and the gear sets 6, 7. In the embodiment of Figure 2, the gear sets 6, 7 are set Between the bracelet wheel 3 and the first lifting sprocket 5 and the second lifting sprocket 9. The actual arrangement, such as the weight of the lifting weight, the weight ratio of the gear set and the two lifting sprocket, and the size of the space inside the casing of the entire chain hoist, can be selected.

Fig. 2 shows a schematic view of another embodiment of the chain hoist of the present invention. In addition to the arrangement of the gear sets 6, 7 between the hand wheel 3 and the two lifting sprockets 5, 9, the manner in which the lifting chain 10 is wound is also shown, namely: from the direction of the side of the hand wheel 2, The hoisting chain 10 first bypasses the first hoisting sprocket 5 in a clockwise winding direction, then leaves a sufficiently long buffer section 1 1 and then bypasses the hoisting chain 10 in a counterclockwise winding direction. The hoisting sprocket 9, then leaving the load section 12, and finally returning to the first hoisting sprocket 5, constitutes a closed, endless hoisting chain 10.

Figure 3 shows a schematic view of one embodiment of the hoisting chain of the present invention wound on two hoisting sprocket wheels. The schematic of Figure 3 is also shown from the direction of one side of the bracelet wheel. Here you can learn more about how the hoisting chain 10 is wound. However, it is also possible to adopt a reverse winding manner not shown in the drawing, that is, the lifting chain 10 first bypasses the first lifting sprocket 5 in a counterclockwise winding direction, and then leaves a buffer section 11 long enough. Then, the lifting chain 10 is bypassed by the second lifting sprocket 9 in a clockwise winding direction, then the load section 12 is left, and finally returned to the first lifting sprocket 5 to form a closed endless endless Lifting chain 10.

Due to the arrangement of the gear sets 6, 7, the gear shaft 4 is opposite to the direction of rotation of the drive shaft 8, so that the first and second lifting sprocket wheels 5, 5, which rotate with each other, also rotate in opposite directions. It is thus determined that the hoisting chain 10 is wound in such a manner as to ensure that the first hoisting sprocket 5 and the second hoisting sprocket 9 are rotated in opposite directions.

Both the gear shaft 4 and the transmission shaft 9 may be shaft members commonly used in the prior art, and will not be described herein. The gear shaft 4 and the transmission shaft 9 are rotatably supported on the housing (not shown) of the chain hoist 1 respectively. For this purpose, a support base can be integrally formed on the inner wall of the casing of the chain hoist for supporting the gear shaft 4 and the transmission shaft 9, so that the rotational movement of the gear shaft and the transmission shaft is not disturbed.

A hook for suspending the chain hoist may be provided above the chain hoist of the present invention. This enables the mounting or fixing of the chain hoist and other equipment, and is easy to disassemble and replace. In addition, the load section of the hoisting chain may be provided with a hook for hanging a heavy object, such a hook It is also possible to replace other components suitable for connecting heavy objects according to actual application conditions.

Although the preferred embodiments of the present invention have been described in detail, the scope of the present invention is not limited to the specific embodiments, but all changes and alternatives falling within the scope of the invention are covered.

Claims

claims

1. A hand chain hoist, including: a hand chain wheel, a manual chain carried on the hand chain wheel for driving the hand chain wheel, and a gear shaft driven by the hand chain wheel;

It is characterized in that the hand chain hoist also includes:

a first lifting sprocket, which is placed on the gear shaft and rotates synchronously with the gear shaft;

A gear set with a driving wheel and a driven wheel, the driving wheel is set on the gear shaft and rotates synchronously with the gear shaft, and the driven wheel drives the transmission shaft to rotate;

a second lifting sprocket, which is sleeved on the transmission shaft and rotates synchronously with the transmission shaft;

Endless lifting chain, the lifting chain wraps around the first lifting sprocket in a clockwise or counterclockwise winding direction, leaving a buffer section, and then wraps around the first lifting sprocket in the opposite winding direction The second lifting sprocket, after leaving the load section, returns to the first lifting sprocket.

2. The hand chain hoist of claim 1, wherein the first lifting sprocket and the second lifting sprocket are provided between the hand sprocket and the gear set.

3. The hand chain hoist according to claim 1, characterized in that the gear set is provided between the hand chain wheel and the first lifting sprocket wheel and the second lifting sprocket wheel.

4. The hand chain hoist according to any one of claims 1 to 3, characterized in that the difference in the number of teeth between the driving wheel and the driven wheel of the gear set is 1.

5. The hand chain hoist according to any one of claims 1 to 3, characterized in that the gear shaft and the transmission shaft are respectively rotatably supported on the shell of the hand chain hoist. physically.

6. The hand chain hoist according to any one of claims 1 to 3, characterized in that a hook for hanging the hand chain hoist is provided above the hand chain hoist.

7. The hand chain hoist according to any one of claims 1 to 3, characterized in that the load-bearing section of the lifting chain is provided with a hook for hanging heavy objects.