Portable integral aluminum alloy housing hand hoist

Abstract

The utility model relates to a portable whole aluminum alloy shell hand winch, including shell, hook, suspension shaft subassembly, chain, hand wheel and wrench, the chain is hung around the winch of suspension shaft subassembly, the shell is composed of aluminum alloy box body and aluminum alloy bottom cover of integrated die casting, the winch cavity is formed in the aluminum alloy box body, the through -hole that communicates with winch cavity is formed to the side surface of aluminum alloy box body simultaneously, a pair of cross chain threading holes are formed in the aluminum alloy bottom cover, the winch is positioned into winch cavity through the through -hole on the aluminum alloy box body, the chain is threaded in a pair of cross chain threading holes in the aluminum alloy bottom cover when leading out from the shell, the utility model discloses a light weight, high mechanical strength aluminum alloy material integrated die casting forms the whole closed shell, on one hand, the self weight of product is greatly reduced, makes the product more portable, on one hand, the winch part of suspension shaft forms all -round protection, improves the reliability when using the product, prolongs the service life of product.

Description

Technical Field

[0001] This utility model relates to the field of lever hoist technology, and in particular to a lightweight lever hoist with an integral aluminum alloy shell. Background Technology

[0002] A lever hoist is a small, lightweight, easy-to-use, efficient, and portable manual lifting (hoisting) tool. Lightweight (miniature) lever hoists typically do not include a reduction gear set, resulting in a simpler and lighter overall structure. They achieve lifting and hoisting functions directly through manual operation of the winch shaft, with the operating torque directly amplified by the gear mechanism, eliminating the need for an additional reduction gear. These lever hoists are mainly used for small lifting operations under 1 ton, such as in interior decoration and agricultural machinery, and are the preferred tool due to their portability, compact size, and low price.

[0003] However, the shell (outer shell) of these small and micro lever hoists still uses the same design structure as that of large and medium-sized hoists, namely the "two-part structure": it consists of two corresponding plate-shaped half-shells connected by 3 to 4 connecting pins or bolts. To ensure strength, the shell is usually made of heavy alloy steel or stainless steel, and the winch of the lifting shaft is located in the gap between the two plate-shaped half-shells. At the same time, the lifting chain hanging on the winch also passes through the gap between the two plate-shaped half-shells. The disadvantages of this shell structure are: first, the shell itself is relatively heavy, resulting in a large overall weight of the lever hoist; second, the shell cannot provide all-round closed protection for the lifting shaft winch (the lifting shaft winch is directly exposed on all sides), which makes the winch part of the lever hoist product susceptible to external impurities, corrosion, jamming, or mechanical damage during transportation, use, and storage due to harsh environments, resulting in a shortened product life or scrap. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a lightweight, integral aluminum alloy shell lever hoist to overcome the defects and shortcomings of the existing technology and products as described in the background art.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a lightweight, integral aluminum alloy shell lever hoist, including a shell, hook, lifting shaft assembly, lifting chain, ratchet locking mechanism, handwheel, and wrench. The lifting shaft assembly includes a winch, and the lifting chain is wound around the winch. The ratchet locking mechanism includes a ratchet fitted on the lifting shaft assembly and a locking piece adapted to the ratchet. The shell is composed of an integrally die-cast aluminum alloy box and an aluminum alloy bottom cover. The aluminum alloy bottom cover is embedded in the bottom of the aluminum alloy box and locked together by a connecting pin. The top of the housing has a hook mounting hole, and the aluminum alloy housing has a winch cavity that matches the shape of the winch of the lifting shaft assembly. At the same time, a through hole communicating with the winch cavity is formed on one side surface of the aluminum alloy housing. A locking plate mounting position is formed next to the through hole and a locking plate is installed. A pair of cross-shaped chain passage holes are formed in the aluminum alloy bottom cover. The winch of the lifting shaft assembly enters the winch cavity through the through hole on the aluminum alloy housing and is positioned there. When the chain hanging on the winch is led out from the housing, it passes through the pair of cross-shaped chain passage holes in the aluminum alloy bottom cover.

[0006] Furthermore, a U-shaped chain guide groove is also formed inside the aluminum alloy box. The two outlets of the U-shaped chain guide groove are respectively opposite to the two cross-shaped chain passage holes in the aluminum alloy bottom cover. When the chain is hung on the winch, it is also locked in the U-shaped chain guide groove.

[0007] To go further, a ratchet protective arc is formed on the surface of the aluminum alloy box near the perimeter of the through hole.

[0008] Preferably, the handwheel is also made of aluminum alloy.

[0009] Preferably, the wrench is made of rubber.

[0010] The beneficial effects of this utility model are as follows: The lightweight integrated aluminum alloy shell lever hoist of this utility model is formed by integral die casting of lightweight and high mechanical strength aluminum alloy material to create a fully enclosed shell. On the one hand, it greatly reduces the weight of the product (less than half the weight of existing shell structure lever hoists), making the product lighter, easier to carry and use. On the other hand, it provides all-round protection for the winch part of the lifting shaft assembly, thereby improving the reliability of the product during use and extending the service life of the product. At the same time, it makes the product structure more compact, smaller in size, and more beautiful in appearance. Attached Figure Description

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0013] Figure 2This is a three-dimensional structural diagram of the shell in this utility model;

[0014] Figure 3 , Figure 4 All are schematic diagrams of the assembly structure of the shell in this utility model (from different perspectives);

[0015] Figure 5 , Figure 6 These are front and bottom views of the aluminum alloy box body in this utility model.

[0016] Figure 7 for Figure 5 A schematic diagram of the AA-direction cross-section structure;

[0017] Figure 8 , Figure 9 These are front and bottom view structural schematic diagrams of the aluminum alloy bottom cover of this utility model.

[0018] In the diagram: 1. Housing; 1-1. Aluminum alloy box; 1-1-1. Hook mounting hole; 1-1-2. Winch cavity; 1-1-3. Through hole; 1-1-4. Locking plate mounting position; 1-1-5. U-shaped chain guide groove; 1-1-6. Ratchet protective arc stop; 1-2. Aluminum alloy bottom cover; 1-2-1. Cross-shaped chain passage hole; 2. Hook; 3. Ratchet; 4. Locking plate; 5. Handwheel; 6. Wrench; 7. Connecting pin. Detailed Implementation

[0019] A lightweight, one-piece aluminum alloy casing lever hoist, such as Figures 1 to 9 As shown, it includes a housing 1, a hook 2, a lifting shaft assembly, a lifting chain, a ratchet locking mechanism, a handwheel 5, and a wrench 6. The lifting shaft assembly includes a winch, and the lifting chain is wound around the winch. The ratchet locking mechanism includes a ratchet 3 fitted onto the lifting shaft assembly and a locking plate 4 adapted to the ratchet 3. The housing 1 is composed of an integrally die-cast aluminum alloy box body 1-1 and an aluminum alloy bottom cover 1-2. The aluminum alloy bottom cover 1-2 is fitted into the bottom of the aluminum alloy box body 1-1 and locked by a connecting pin 7. A hook mounting hole 1-1-1 is formed on the top of the aluminum alloy box body 1-1, and a hook for connecting the lifting shaft assembly is formed inside the aluminum alloy box body 1-1. The winch cavity 1-1-2 is adapted to the shape of the disc. At the same time, a through hole 1-1-3 communicating with the winch cavity 1-1-2 is formed on one side surface of the aluminum alloy housing 1-1. A locking plate mounting position 1-1-4 is formed next to the through hole 1-1-3 and a locking plate 4 is installed. A pair of cross-shaped chain passage holes 1-2-1 are formed in the aluminum alloy bottom cover 1-2. The winch of the shaft assembly enters the winch cavity 1-1-2 and is positioned through the through hole 1-1-3 on the aluminum alloy housing 1-1. When the chain hanging on the winch is led out from the housing 1, it passes through the pair of cross-shaped chain passage holes 1-2-1 in the aluminum alloy bottom cover 1-2.

[0020] By using lightweight, high-strength aluminum alloy material for one-piece die casting to form a fully enclosed shell, the product's weight is greatly reduced, making it lighter, easier to carry and use. At the same time, it provides all-round protection for the winch part of the hanging shaft assembly, thereby improving the reliability of the product during use and extending its service life. In addition, it makes the product structure more compact, smaller in size, and more aesthetically pleasing.

[0021] See Figure 4 , Figure 6 and Figure 7 In this example, a U-shaped chain guide groove 1-1-5 is also formed inside the aluminum alloy housing 1-1. The two outlets of the U-shaped chain guide groove 1-1-5 are respectively opposite to the two cross-shaped chain passage holes 1-2-1 in the aluminum alloy bottom cover 1-2. When the chain is hung on the winch, it is precisely locked in the U-shaped chain guide groove 1-1-5. Currently, existing hand-operated winches with shell structures guide and stabilize the moving chain by setting pulleys next to the winch. However, installing additional pulleys not only increases the complexity of the mechanical structure, but the guiding and stabilizing effect of pulleys on the chain is far inferior to that of the guide groove. This solution makes good use of the internal space of the shell, simplifying the structure and improving the efficiency.

[0022] In order to improve the protection of the ratchet 3 mounted on the hanging shaft assembly and prevent it from being disturbed or damaged by external forces, a ratchet protection arc 1-1-6 is formed on the surface of the aluminum alloy housing 1-1 near the periphery of the through hole 1-1-3.

[0023] In this example, handwheel 5 is also made of aluminum alloy, and wrench 6 is made of rubber to improve the grip feel.

[0024] The above embodiments are only used to explain the present utility model and are not intended to limit the protection of the present utility model. Any non-substantial modifications made based on the essential solution of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A lightweight, integral aluminum alloy housing lever hoist, comprising a housing (1), a hook (2), a lifting shaft assembly, a lifting chain, a ratchet locking mechanism, a handwheel (5), and a wrench (6), wherein the lifting shaft assembly includes a winch, the lifting chain is wound around the winch, and the ratchet locking mechanism includes a ratchet (3) fitted on the lifting shaft assembly and a locking plate (4) adapted to the ratchet (3), characterized in that: The housing (1) is composed of an integrally die-cast aluminum alloy box body (1-1) and an aluminum alloy bottom cover (1-2). The aluminum alloy bottom cover (1-2) is embedded in the bottom of the aluminum alloy box body (1-1) and locked by a connecting pin (7). A hook mounting hole (1-1-1) is formed on the top of the aluminum alloy box body (1-1). A winch cavity (1-1-2) adapted to the shape of the winch of the lifting shaft assembly is formed inside the aluminum alloy box body (1-1). At the same time, a surface on one side of the aluminum alloy box body (1-1) is formed that communicates with the winch cavity (1-1-2). The through hole (1-1-3) is formed next to the through hole (1-1-3) and a locking plate mounting position (1-1-4) is formed thereon and a locking plate (4) is installed thereon. A pair of cross-shaped chain passage holes (1-2-1) are formed in the aluminum alloy bottom cover (1-2). The winch of the shaft assembly enters the winch cavity (1-1-2) through the through hole (1-1-3) on the aluminum alloy box (1-1) and is positioned thereon. When the chain hanging on the winch is led out from the housing (1), it passes through a pair of cross-shaped chain passage holes (1-2-1) in the aluminum alloy bottom cover (1-2).

2. The lightweight integral aluminum alloy shell lever hoist according to claim 1, characterized in that: A U-shaped chain guide groove (1-1-5) is also formed inside the aluminum alloy box (1-1). The two outlets of the U-shaped chain guide groove (1-1-5) are respectively opposite to the two cross-shaped chain passage holes (1-2-1) in the aluminum alloy bottom cover (1-2). When the chain is hung on the winch, it is also locked in the U-shaped chain guide groove (1-1-5).

3. The lightweight integral aluminum alloy shell lever hoist according to claim 1, characterized in that: A ratchet protective arc stop (1-1-6) is formed on the surface of the aluminum alloy box (1-1) near the periphery of the through hole (1-1-3).

4. The lightweight integral aluminum alloy shell lever hoist according to claim 1, characterized in that: The handwheel (5) is also made of aluminum alloy.

5. The lightweight integral aluminum alloy shell lever hoist according to claim 1, characterized in that: The wrench (6) is made of rubber.

Images