Chain block transmission structure and chain block

Abstract

The utility model relates to the field of hoisting tools, in particular to a chain block transmission structure and a chain block. The chain block transmission structure is characterized in that the chain block transmission structure comprises a fixed shell, and a fixed hook fixedly connected with the fixed shell is arranged above the fixed shell; the first connecting shaft is provided with a hand chain wheel which is fixedly connected or movably connected, and one surface of the hand chain wheel is provided with a small gear which is fixedly connected; the other surface of the hand chain wheel is fixedly connected with a ratchet wheel; the hand chain wheel, the first connecting shaft, the pinion and the ratchet wheel are respectively positioned on the same axis; the pawl is movably mounted on the fixed shell; the pawl is located vertically above the ratchet wheel; the second connecting shaft is provided with a big gear which is movably connected or fixedly connected, and one surface of the big gear is provided with a hoisting chain wheel which is fixedly connected; the second connecting shaft, the large gear and the hoisting chain wheel are located on the same axis.

Description

Technical Field

[0001] This utility model relates to the field of hoisting tools, specifically to a hand chain hoist transmission structure and a hand chain hoist. Background Technology

[0002] A hand chain hoist, also known as a manual chain hoist, is a simple and portable manual lifting machine. It is suitable for short-distance lifting of small equipment and goods. The hoist's outer shell is made of high-quality alloy steel, making it sturdy, wear-resistant, and highly safe. When lifting a heavy object, pulling the manual chain clockwise rotates the hand chain wheel; when lowering, pulling the chain counter-clockwise separates the brake seat from the brake pads. The ratchet stops under the action of the pawl, and the five-tooth long shaft drives the lifting chain wheel in the opposite direction, thus smoothly lowering the heavy object. Hand chain hoists generally use a ratchet friction plate type one-way brake, which can automatically brake under load. The pawl engages with the ratchet under the action of a spring, ensuring safe operation of the brake. It features safety and reliability, easy maintenance, high mechanical efficiency, low bracelet tension, light weight for easy carrying, beautiful appearance and small size, and durability. It is suitable for use in factories, mines, construction sites, docks, shipyards, warehouses, etc. for installing machinery and lifting goods. It is especially superior for open-air and power-free operations.

[0003] There are many styles of hand chain hoists available now, but they have at least the following shortcomings:

[0004] 1. Although current hand chain hoists are not large in size, they are composed of a large number of parts, including at least: hand chain wheel, hand chain, friction plate, spike wheel, ratchet, brake seat, five-tooth long shaft, disc gear, four-tooth short shaft, splined gear, lifting chain wheel, etc. Some models of hand chain hoists even have hundreds of parts, which leads to high production costs and complicated assembly.

[0005] 2. One of the main functions of current chain hoists is to save labor, but they suffer from low efficiency and slow pulling speed. This is especially true when lifting or lowering very light items, which is very time-consuming. Therefore, when lifting or lowering light items, pulleys are often used directly, which is faster. However, pulleys have the problem of not being able to position themselves in real time. Utility Model Content

[0006] The purpose of this invention is to at least solve the problems of existing hand chain hoists, such as numerous parts, high production costs, slow speed, and low efficiency.

[0007] To solve the above-mentioned technical problems, the transmission structure of this utility model for a hand chain hoist is characterized by comprising:

[0008] A fixed housing with a fixed hook for fixed connection on its upper part;

[0009] A first connecting shaft has a hand chain wheel that is either fixedly or movably connected. One side of the hand chain wheel has a pinion that is fixedly connected to it, and the other side of the hand chain wheel has a ratchet that is fixedly connected to it. The hand chain wheel, the first connecting shaft, the pinion, and the ratchet are all located on the same axis.

[0010] A pawl, which is movably mounted on the fixed housing; the pawl is positioned vertically above the ratchet;

[0011] The second connecting shaft has a large gear that is either movably or fixedly connected, and one side of the large gear has a fixedly connected lifting sprocket; the second connecting shaft, the large gear, and the lifting sprocket are all on the same axis.

[0012] As a preferred embodiment of the transmission structure of the hand chain hoist of this utility model, it includes a control arm, one end of which is movably connected to the fixed shell, and the other end of which has a first roller and a second roller movably connected; the middle part of the control arm is movably connected to the pawl.

[0013] As a preferred embodiment of the transmission structure of the hand chain hoist of this utility model, it includes a pull rod, one end of which is movably connected to the control arm, and the other end of which is movably connected to the pawl.

[0014] In a preferred embodiment of the transmission structure of the hand chain hoist of this utility model, the fixed shell has a third connecting shaft that is movably connected, and the control arm is movably connected to the third connecting shaft.

[0015] In a preferred embodiment of the transmission structure of the hand chain hoist of this utility model, a first limiting sleeve is installed on the surface of the first connecting shaft. One end of the first limiting sleeve abuts against the inner wall of the fixed shell, and the other end of the first limiting sleeve abuts against the side of the pinion.

[0016] In a preferred embodiment of the transmission structure of the hand chain hoist of this utility model, a second limiting sleeve is installed on the surface of the second connecting shaft. One end of the second limiting sleeve abuts against the inner wall of the fixed shell, and the other end of the second limiting sleeve abuts against the side of the large gear.

[0017] In a preferred embodiment of the transmission structure of the hand chain hoist of this utility model, the first roller and the second roller are deleted and replaced with a sliding sleeve.

[0018] The present invention relates to a hand chain hoist, characterized in that the transmission structure of the hand chain hoist described in any of the above claims further includes a hand chain, which connects to the hand chain wheel and passes between the first roller and the second roller;

[0019] It includes a lifting chain that is connected to the lifting sprocket and has a lifting hook at one end.

[0020] Beneficial effects

[0021] This utility model solves the above-mentioned existing problems and other existing problems not mentioned above, and brings at least the following innovative advantages:

[0022] This utility model relates to a hand chain hoist transmission structure and hand chain hoist. By making the hand chain wheel, pinion, and ratchet a fixedly connected integrated structure, and the large gear and lifting chain wheel a fixedly connected integrated structure, the overall number of parts is greatly reduced compared to existing hand chain hoists. Furthermore, it results in lower production costs and easier assembly. When used in a hand chain hoist, this utility model offers fast pulling speed and high efficiency.

[0023] This utility model relates to a hand chain hoist transmission structure and a hand chain hoist. The hand chain passes over the hand chain wheel and then through the space between the first and second rollers. When the operator pulls the hand chain, it moves to the right, which in turn pushes the control arm via the second roller. The control arm then pulls the pawl, disengaging it from the ratchet wheel for quick clockwise or counterclockwise rotation of the hand chain wheel. For positioning, the hand chain can be moved to the left, which in turn pushes the control arm via the first roller, causing the control arm to engage the pawl with the ratchet wheel, achieving positioning. Thus, this utility model achieves both rapid opening and closing efficiency and a conveniently adjustable positioning function. Attached Figure Description

[0024] Figure 1 This is a three-dimensional rendering of the present invention;

[0025] Figure 2 This is a three-dimensional view of the present invention from another angle;

[0026] Figure 3 This is an exploded view of the present invention;

[0027] Figure 4 This is a top view of the present invention.

[0028] Figure 5 for Figure 4 Cross-sectional view of position AA in the middle;

[0029] Figure 6 This is a three-dimensional rendering of the bracelet wheel, ratchet, and pinion of this utility model.

[0030] In the diagram: 1. Fixed shell, 2. Fixed hook, 3. First connecting shaft, 4. Hand chain wheel, 5. Small gear, 6. Ratchet, 7. Pad, 8. Second connecting shaft, 9. Large gear, 10. Lifting sprocket, 11. Control arm, 12. First roller, 13. Second roller, 14. Pull rod, 15. Third connecting shaft, 16. First limiting sleeve, 17. Second limiting sleeve. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings.

[0032] In the accompanying drawings, the same reference numerals represent the same parts. It should be noted that the described embodiments are only some, not all, of the embodiments disclosed herein.

[0033] Based on the embodiments described in this disclosure, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this disclosure.

[0034] Example 1

[0035] The transmission structure of the hand chain hoist includes a fixed housing 1, such as... Figure 1 and Figure 2 As shown, the upper part of the fixed shell 1 has a fixed hook 2 for fixed connection;

[0036] Including the first connecting shaft 3, Figure 1 , Figure 2 , Figure 3 and Figure 6 This demonstrates that the first connecting shaft 3 has a hand chain wheel 4 with a fixed or movable connection, such as Figure 3 Therefore, one side of the hand chain wheel 4 has a small gear 5 fixedly connected; such as Figure 6 As shown, the other side of the chain wheel 4 has a ratchet 6 fixedly connected to it. Figure 3 and Figure 6 The hand chain wheel 4, the first connecting shaft 3, the pinion 5, and the ratchet 6 are all located on the same axis.

[0037] Including pawl 7, Figure 1 and Figure 2 The pawl 7 is shown to be movably mounted on the fixed housing 1; the pawl 7 is positioned vertically above the ratchet 6;

[0038] Second connecting shaft 8, Figure 1 , Figure 2 , Figure 3 ,and Figure 6The second connecting shaft 8 is shown to have a large gear 9 with either a movable or fixed connection, such as... Figure 2 and Figure 3 As shown, one side of the large gear 9 has a fixedly connected lifting sprocket 10; the second connecting shaft 8, the large gear 9 and the lifting sprocket 10 are respectively on the same axis.

[0039] This utility model relates to a hand chain hoist transmission structure. By making the hand chain wheel 4, pinion 5, and ratchet 6 a fixedly connected integrated structure, and the large gear 9 and lifting chain wheel 10 a fixedly connected integrated structure, the overall number of parts is greatly reduced compared to existing hand chain hoists. Furthermore, it has lower production costs and is easier to assemble. When used in a hand chain hoist, this utility model results in fast pulling speed and high efficiency.

[0040] like Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, it also includes a control arm 11, one end of which is movably connected to the fixed housing 1, and the other end of which has a first roller 12 and a second roller 13 movably connected; the middle part of the control arm 11 is movably connected to the pawl 7. It also includes a pull rod 14. Figure 5 This demonstrates that one end of the pull rod 14 is movably connected to the control arm 11, and the other end of the pull rod 14 is movably connected to the pawl 7. (As shown) Figure 5 As shown, when this utility model is used, the hand chain passes around the hand chain wheel 4 and then passes between the first roller 12 and the second roller 13. When the operator pulls the hand chain, as... Figure 5 As shown, when the hand chain moves to the right, it can push the control arm 11 via the second roller 13, causing the control arm 11 to pull the pawl 7, disengaging the pawl 7 from the ratchet 6, allowing for quick clockwise or counterclockwise rotation of the hand chain wheel 4; and when positioning is required, such as... Figure 5 As shown, the hand chain can be moved to the left, which in turn pushes the control arm 11 via the first roller 12, causing the control arm 11 to push the pawl 7 into the ratchet 6, thus achieving positioning. This allows the present invention to maintain rapid opening and closing efficiency while providing a convenient and adjustable positioning function.

[0041] like Figure 1 and Figure 2As shown, the fixed housing 1 has a movably connected third connecting shaft 15, and the control arm 11 is movably connected to the third connecting shaft 15; that is, the movable connection between the control arm 11 and the fixed housing 1 is achieved through the third connecting shaft 15. A first limiting sleeve 16 is installed on the surface of the first connecting shaft 3. One end of the first limiting sleeve 16 abuts against the inner wall of the fixed housing 1, and the other end of the first limiting sleeve 16 abuts against the side of the small gear 5. A second limiting sleeve 17 is installed on the surface of the second connecting shaft 8. One end of the second limiting sleeve 17 abuts against the inner wall of the fixed housing 1, and the other end of the second limiting sleeve 17 abuts against the side of the large gear 9.

[0042] Example 2

[0043] This embodiment 2 includes all the schemes of embodiment 1, so the similarities will not be repeated. The difference is that the first roller 12 and the second roller 13 in embodiment 1 are deleted and replaced with a sliding sleeve. That is, when it is replaced with a sliding sleeve and applied to the hand chain hoist, the hand chain passes through the first roller 12 and the second roller 13 as described in embodiment 1, and then passes through the sliding sleeve.

[0044] Example 3

[0045] The hand chain hoist, in this embodiment 3, includes all the solutions of embodiment 1 or embodiment 2. Therefore, the similarities with embodiment 1 and embodiment 2 will not be repeated. In addition to including embodiment 1 or embodiment 2, it also includes: a hand chain, which connects to the hand chain wheel 4 and passes between the first roller 12 and the second roller 13;

[0046] It includes a lifting chain that is connected to the lifting sprocket 10 and has a lifting hook at one end.

[0047] The terms "first," "second," and similar words used in the specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, terms such as "an," "a," or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. Terms such as "comprising" or "including" indicate that the elements or objects preceding "comprising" encompass the elements or objects listed following "comprising" or their equivalents, and do not exclude other elements or objects. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly. The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of protection of the present invention is defined by the appended claims. For those skilled in the art, other embodiments can be obtained based on the accompanying drawings without creative effort, and any modifications based on the claims of the present invention are also within the scope of protection of the present invention.

Claims

1. A chain hoist drive structure, characterized by, The hand chain block transmission structure comprises: a fixed shell, which is provided with a fixed hook connected to the top of the fixed shell; a first connecting shaft, which is provided with a hand sprocket connected to the first connecting shaft fixedly or movably, one side of the hand sprocket is provided with a pinion connected to the hand sprocket fixedly, and the other side of the hand sprocket is provided with a ratchet connected to the hand sprocket fixedly, the hand sprocket, the first connecting shaft, the pinion and the ratchet are arranged on the same axis respectively; a pawl, which is movably arranged on the fixed shell, and the pawl is arranged vertically above the ratchet; a second connecting shaft, which is provided with a bull gear connected to the second connecting shaft movably or fixedly, one side of the bull gear is provided with a lifting sprocket connected to the bull gear fixedly, and the second connecting shaft, the bull gear and the lifting sprocket are arranged on the same axis respectively.

2. The hand hoist drive structure according to claim 1, characterized in that a control arm, one end of the control arm is movably connected to the fixed shell, and the other end of the control arm is provided with a first roller and a second roller connected to the control arm movably, and the middle part of the control arm is movably connected to the pawl.

3. The handline drive structure according to claim 2, wherein a pull rod, one end of the pull rod is movably connected to the control arm, and the other end of the pull rod is movably connected to the pawl.

4. The handline drive structure according to claim 2, wherein the fixed shell is provided with a third connecting shaft connected to the fixed shell movably, and the control arm is movably connected to the third connecting shaft.

5. The handline drive structure according to claim 1, wherein a first limiting sleeve is arranged on the surface of the first connecting shaft, one end of the first limiting sleeve abuts against the inner wall of the fixed shell, and the other end of the first limiting sleeve abuts against the side surface of the pinion.

6. The handline drive structure according to claim 1, wherein a second limiting sleeve is arranged on the surface of the second connecting shaft, one end of the second limiting sleeve abuts against the inner wall of the fixed shell, and the other end of the second limiting sleeve abuts against the side surface of the bull gear.

7. The handline drive structure according to claim 2, wherein the first roller and the second roller are replaced by a sliding sleeve.

8. A hoist characterised by the hand chain block transmission structure according to any one of claims 1 to 7 further comprises a hand chain, the hand chain is connected to the hand sprocket and passes through the first roller and the second roller; the hand chain block transmission structure further comprises a lifting chain, the lifting chain is connected to the lifting sprocket, and a lifting hook is connected to the end of the lifting chain.

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