Hoist hook assembly with improved structure

Abstract

The utility model provides a hoist hook assembly with an improved structure, and belongs to the technical field of machinery. The problem that an existing hook is inconvenient to assemble is solved. The two supporting plates are fixed together through a bolt and nut assembly, the hook comprises a hook body and a connecting rod, a positioning block is arranged between the two supporting plates, the two ends of the positioning block are fixedly connected with the two supporting plates respectively, a center hole for the upper end of the connecting rod to penetrate through is formed in the middle of the positioning block, and the upper end of the connecting rod is in threaded connection with a limiting nut. The center hole is a stepped hole and is composed of a large hole and a small hole matched with the connecting rod, a positioning hole penetrates through the side wall of the connecting rod in the radial direction, a positioning pin is inserted into the positioning hole, and the two ends of the positioning pin extend out of the positioning hole; the length of the positioning pin is greater than the aperture of the small hole; the positioning pin is always limited in the positioning hole under the action of the hole wall of the large hole, and the lower end of the connecting rod is provided with a limiting structure for limiting upward movement of the hook. The hoist hook assembly with the improved structure is convenient to assemble.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical technology and relates to a hoist hook assembly, particularly a hoist hook assembly with an improved structure. Background Technology

[0002] A hoist is a special lifting device that is installed on rails made of rectangular steel, H-beams, or other steel beams, and is used to lift or load / unload heavy objects.

[0003] The hook assembly is an important component of the hoist, and its structure is as described in the hoist hook assembly previously proposed by the applicant (application number: 202421281076.1). It includes a hook and two symmetrical support plates. A guide wheel is rotatably provided between the upper ends of the two support plates. The two support plates are fixedly connected in the middle by a horizontally arranged stud. The hook includes a hook body and a connecting rod, and the connecting rod is vertically arranged between the lower ends of the two support plates. A stop block is integrally formed on the inner side of the lower end of the support plate. The two stop blocks are attached together and form a vertically penetrating through hole between them. The upper end of the connecting rod passes through the through hole. A retaining ring is integrally formed on the outer wall of the upper end of the connecting rod. The retaining ring is coaxially arranged with the connecting rod, and the outer diameter of the retaining ring is larger than the diameter of the through hole. The retaining ring presses on the two stop blocks, and the two stop blocks are fixedly connected to the retaining ring by vertically arranged screws. The two stop blocks are welded together.

[0004] When assembling the hook assembly, the connecting rod must first be inserted into the through hole before the two stops can be fixed. Since the two stops are fixed together by welding, the hook semi-finished product needs to be transferred to the welding station for clamping and welding during assembly. After welding, it needs to be transferred to the assembly station for subsequent assembly, making the whole operation not only cumbersome but also inefficient. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing an improved gourd hook assembly with a convenient assembly structure.

[0006] The objective of this utility model can be achieved through the following technical solution: an improved hoist hook assembly, comprising a hook and two symmetrical support plates, the two support plates being fixed together by a bolt and nut assembly, the hook comprising a hook body and a connecting rod, a positioning block provided between the two support plates, the two support plates being fixedly connected to the two ends of the positioning block respectively, the positioning block having a central hole in the middle for the upper end of the connecting rod to pass through, a limit nut being screwed onto the upper end of the connecting rod, and the limit nut pressing against the top of the positioning block, characterized in that the central hole is a stepped hole, which consists of a large hole and a small hole matching the connecting rod, with the large hole positioned above the small hole; a positioning hole is radially penetrating the side wall of the connecting rod, a positioning pin matching it is inserted into the positioning hole, and both ends of the positioning pin extend out of the positioning hole; the positioning pin is located in the large hole, and the length of the positioning pin is greater than the diameter of the small hole; the positioning pin is always confined in the positioning hole under the action of the large hole wall, and a limiting structure for restricting the upward movement of the hook is provided at the lower end of the connecting rod.

[0007] In the large hole, the locating pin is always confined within the locating hole, and the length of the locating pin is set to be greater than the diameter of the small hole. This way, even if the limit nut falls off, the locating pin will still abut against the bottom wall of the large hole to support the connecting rod upwards, preventing the hook from falling, thus ensuring good safety.

[0008] With the cooperation of limit nuts, positioning pins, and limit structures, the hook can be stably positioned and prevented from falling at the same time, while effectively avoiding welding operations. This reduces assembly steps and allows the entire assembly process to be completed at the same station, thereby greatly improving assembly convenience and efficiency.

[0009] In the improved hoist hook assembly described above, the limiting structure is a pressure ring sleeved and fixed on the connecting rod, with the pressure ring pressing against the bottom of the positioning block. This design offers advantages such as simple structure and stable limiting.

[0010] In the improved hoist hook assembly described above, the pressure ring and the connecting rod are screwed together by threads, so that rotating the pressure ring can change its position and height for easy adjustment.

[0011] In the improved hoist hook assembly described above, a threaded hole is radially formed on the lower end sidewall of the connecting rod. A limit bolt is screwed into the threaded hole, and the distance between the pressure ring and the limit bolt is less than the distance required for the locating pin to move upwards and extend out of the large hole. The limit bolt is used to limit the downward movement distance of the pressure ring, so that even after the pressure ring moves downwards, the locating pin is still confined in the large hole, ensuring the stable achievement of the hook's anti-fall purpose.

[0012] As an alternative, in the improved hoist hook assembly described above, the pressure ring and the connecting rod are tightly connected in contact.

[0013] In the improved gourd hook assembly described above, the inner wall of the large hole has a vertically arranged positioning groove that matches the positioning pin, with the upper end of the positioning groove open; there are two positioning grooves, and the two ends of the positioning pin are inserted into the two positioning grooves respectively. The positioning groove and the positioning pin cooperate to further restrict the hook in the circumferential direction and prevent the hook from rotating.

[0014] In the improved gourd hook assembly described above, the two ends of the positioning pin are respectively positioned close to the bottom wall of the two positioning grooves to further ensure that the positioning pin is confined in the positioning hole, so that the anti-fall function of this hook assembly is more stably realized.

[0015] In the improved hoist hook assembly described above, the axial direction of the locating pin is perpendicular to the arrangement direction of the two support plates, so that the support plates avoid the insertion position of the locating pin, making it convenient for the locating pin to be installed.

[0016] Compared with existing technologies, the improved hoist hook assembly has the following advantages:

[0017] 1. In the large hole, the positioning pin is always confined in the positioning hole, and the length of the positioning pin is set to be greater than the diameter of the small hole. In this way, even if the limit nut falls off, the positioning pin will still abut against the bottom wall of the large hole to support the connecting rod upward and prevent the hook from falling, which is safer.

[0018] 2. With the cooperation of the limit nut, positioning pin, and limit structure, the hook can be stably positioned and prevented from falling at the same time, while effectively avoiding welding operations. This reduces assembly steps and allows the entire assembly process to be completed at the same station, thereby greatly improving assembly convenience and efficiency.

[0019] 3. The limit bolt is used to limit the downward movement distance of the pressure ring. This way, even after the pressure ring moves downward, the positioning pin is still confined in the large hole, ensuring that the hook anti-fall purpose is stably achieved. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of the improved gourd hook assembly.

[0021] Figure 2 This is a cross-sectional schematic diagram of the improved gourd hook assembly.

[0022] Figure 3 This is a schematic diagram of the fit between the locating pin and the locating groove.

[0023] In the diagram, 1. Hook; 1a. Hook body; 1b. Connecting rod; 2. Support plate; 3. Bolt and nut assembly; 4. Positioning block; 4a. Shaft; 4b. Center hole; 4b1. Large hole; 4c. Positioning groove; 5. Nut II; 6. Limiting nut; 7. Positioning pin; 8. Pressure ring; 9. Limiting bolt. Detailed Implementation

[0024] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0025] Example 1: As Figure 1 and Figure 2 As shown, the improved hoist hook assembly includes a hook 1 and two symmetrical support plates 2.

[0026] in,

[0027] The support plate 2 is generally triangular in structure, with rounded corners at each of the three support feet. The two support plates 2 are fixed together by bolt and nut assemblies 3, preferably three sets of which are distributed at the three corners of the support plates 2. Specifically, each bolt and nut assembly 3 includes a bolt and a nut, with external threads at both ends of the bolt. The bolt is horizontally positioned between the two support plates 2, with both ends passing through the corresponding support plate 2 and screwed onto the aforementioned nut. An anti-slip washer is provided between each nut and its corresponding support plate 2 to stably connect the two support plates 2 together. In the actual product, the upper bolt is fitted with a matching guide wheel, with both ends of the guide wheel positioned close to the two support plates 2 to ensure stable rotation.

[0028] The hook 1 is an integral structure, including a hook body 1a and a connecting rod 1b. The connecting rod 1b is vertically arranged, and the lower end of the connecting rod 1b is connected to the hook body 1a.

[0029] like Figure 1 and Figure 2 As shown, a positioning block 4 is provided between the lower sides of the two support plates 2, and the two support plates 2 are fixedly connected to both ends of the positioning block 4. Specifically, both ends of the two positioning blocks 4 have horizontally arranged shafts 4a, and the two shafts 4a pass through the two support plates 2 and are screwed with nuts 5. Anti-slip pads are provided between the two nuts 5 and the two support plates 2 to stably position the positioning block 4. In the actual product, the support plates 2 are provided with clearance holes for the shafts 4a to pass through, and the outer wall of the shaft 4a and the inner wall of the clearance hole are connected by a polygonal surface contact to prevent the positioning block 4 from rotating relative to the support plates 2.

[0030] Specifically, the positioning block 4 has a central hole 4b in its middle for the upper end of the connecting rod 1b to pass through. A limit nut 6 is screwed onto the upper end of the connecting rod 1b, and the limit nut 6 presses against the top of the positioning block 4. The central hole 4b is a stepped hole, consisting of a large hole 4b1 and a small hole that matches the connecting rod 1b. The large hole 4b1 and the small hole are connected, and the large hole 4b1 is located above the small hole. Preferably, the inner wall of the small hole and the outer wall of the connecting rod 1b are in contact through a circumferential surface. Figure 2 and Figure 3 As shown, a positioning hole is radially penetrating the side wall of the connecting rod 1b, meaning the positioning hole is horizontally positioned at this time. A matching positioning pin 7 is inserted into the positioning hole, with both ends of the positioning pin 7 extending out of the positioning hole; the positioning pin 7 is located within the large hole 4b1, and the length of the positioning pin 7 is greater than the diameter of the small hole; the positioning pin 7 is always confined within the positioning hole by the action of the wall of the large hole 4b1, and a limiting structure is provided at the lower end of the connecting rod 1b to restrict the upward movement of the hook 1.

[0031] In the large hole 4b1, the positioning pin 7 is always confined in the positioning hole, and the length of the positioning pin 7 is set to be greater than the diameter of the small hole. In this way, even if the limit nut 6 falls off, the positioning pin 7 will still abut against the bottom wall of the large hole 4b1 to support the connecting rod 1b upward and prevent the hook 1 from falling, which provides good safety.

[0032] With the cooperation of the limiting nut 6, the positioning pin 7, and the limiting structure, the hook 1 can be stably positioned and prevented from falling at the same time, while the welding operation can be effectively avoided. This reduces the number of assembly steps and allows the entire assembly process to be completed at the same station, thereby greatly improving the convenience and efficiency of assembly.

[0033] In this embodiment, the limiting structure is a pressure ring 8 sleeved and fixed on the connecting rod 1b, and the pressure ring 8 presses against the bottom of the positioning block 4. This design has the advantages of simple structure and stable limiting. Preferably, the pressure ring 8 and the connecting rod 1b are screwed together, so that rotating the pressure ring 8 can change its position and height, which is convenient for adjustment.

[0034] To further explain, a threaded hole is radially formed on the lower side wall of the connecting rod 1b, meaning the threaded hole is horizontally positioned. A limit bolt 9 is screwed into the threaded hole, and the distance between the pressure ring 8 and the limit bolt 9 is less than the distance required for the locating pin 7 to move upwards and extend out of the large hole 4b1. The limit bolt 9 is used to limit the downward movement distance of the pressure ring 8, so that even after the pressure ring 8 moves downwards, the locating pin 7 remains confined within the large hole 4b1, ensuring the stable achievement of the anti-fall purpose of the hook 1.

[0035] like Figure 2 and Figure 3 As shown, the inner wall of the large hole 4b1 has a vertically arranged positioning groove 4c that matches the positioning pin 7. The upper end of the positioning groove 4c is open. There are two positioning grooves 4c, and the two ends of the positioning pin 7 are respectively inserted into the two positioning grooves 4c. The positioning grooves 4c and the positioning pin 7 cooperate to further restrict the hook 1 in the circumferential direction and prevent the hook 1 from rotating. Preferably, the two ends of the positioning pin 7 are respectively set close to the bottom wall of the two positioning grooves 4c to further ensure that the positioning pin 7 is confined in the positioning hole, so that the anti-fall function of the hook 1 assembly is more stably realized.

[0036] In actual products, the axial direction of the locating pin 7 is perpendicular to the arrangement direction of the two support plates 2, so that the support plates 2 avoid the insertion position of the locating pin 7, making it convenient for the locating pin 7 to be installed.

[0037] Example 2: The structure and principle of Example 2 are basically the same as those of Example 1. The difference is that the pressure ring 8 and the connecting rod 1b are in close contact and fixed together.

[0038] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A modified hoist hook assembly, comprising a hook (1) and two symmetrical support plates (2), the two support plates (2) being fixed together by a bolt and nut assembly (3), the hook (1) comprising a hook body (1a) and a connecting rod (1b), a positioning block (4) being provided between the two support plates (2), the two support plates (2) being fixedly connected at both ends of the positioning block (4), the positioning block (4) having a central hole (4b) in the middle for the upper end of the connecting rod (1b) to pass through, a limiting nut (6) being screwed onto the upper end of the connecting rod (1b), and the limiting nut (6) pressing against the top of the positioning block (4), characterized in that, The type of the center hole (4b) is a stepped hole. The center hole (4b) consists of a large hole (4b1) and a small hole that matches the connecting rod (1b), and the large hole (4b1) is above the small hole. A positioning hole is radially penetrating the side wall of the connecting rod (1b). A positioning pin (7) matching the positioning pin is inserted into the positioning hole, and both ends of the positioning pin (7) extend out of the positioning hole. The positioning pin (7) is inside the large hole (4b1), and the length of the positioning pin (7) is greater than the diameter of the small hole. The positioning pin (7) is always confined in the positioning hole under the action of the hole wall of the large hole (4b1). The lower end of the connecting rod (1b) is provided with a limiting structure for restricting the upward movement of the hook (1).

2. The improved gourd hook assembly according to claim 1, characterized in that, The aforementioned limiting structure is a pressure ring (8) sleeved and fixed on the connecting rod (1b), and the pressure ring (8) presses against the bottom of the positioning block (4).

3. The improved gourd hook assembly according to claim 2, characterized in that, The pressure ring (8) and the connecting rod (1b) are screwed together by threads.

4. The improved gourd hook assembly according to claim 3, characterized in that, A threaded hole is radially opened on the lower end side wall of the connecting rod (1b), and a limit bolt (9) is screwed into the threaded hole. The distance between the pressure ring (8) and the limit bolt (9) is less than the distance required for the positioning pin (7) to move upward to the protruding large hole (4b1).

5. The improved gourd hook assembly according to claim 2, characterized in that, The pressure ring (8) and the connecting rod (1b) are in close contact and fixed together.

6. The improved gourd hook assembly according to claim 1, characterized in that, The inner wall of the large hole (4b1) has a vertically arranged positioning groove (4c) that matches the positioning pin (7). The upper end of the positioning groove (4c) is open. There are two positioning grooves (4c), and the two ends of the positioning pin (7) are inserted into the two positioning grooves (4c) respectively.

7. The improved gourd hook assembly according to claim 6, characterized in that, The two ends of the positioning pin (7) are respectively set close to the bottom wall of the two positioning grooves (4c).

8. The improved gourd hook assembly according to claim 1, characterized in that, The axial direction of the positioning pin (7) is perpendicular to the arrangement direction of the two support plates (2).

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