A chain-and-loop hoist clutch regulating device

Abstract

The utility model belongs to the technical field of hoisting machinery relates to a kind of ring chain hoist clutch adjusting device, including gear box, clutch assembly is arranged in gear box, the output end of clutch assembly is connected output shaft, bearing press sleeve is sleeved on the output shaft, the first bearing of supporting output shaft and the oil seal of sealing gear box are arranged in bearing press sleeve, the one end of bearing press sleeve close to clutch assembly is provided with outer thread section, the outer thread section is screwed with the internal thread hole of gear box, the outer periphery of the one end of bearing press sleeve away from clutch assembly is provided with transmission gear part;It also includes transmission gear and adjusting gear, the transmission gear is engaged with the transmission gear part of bearing press sleeve, the adjusting gear is engaged with transmission gear, the adjusting gear is equipped with the drive end of outward extension, for the rotation of external tool driving it. The ring chain hoist clutch adjusting device provided by the utility model has the advantages of convenient operation, labor saving, and high adjustment accuracy.

Description

Technical Field

[0001] This utility model belongs to the technical field of lifting machinery and relates to a clutch adjustment device for a chain hoist. Background Technology

[0002] As a type of light and small lifting equipment, the performance of the clutch in a chain hoist directly affects transmission efficiency, operational safety, and component lifespan. The clutch needs to maintain a suitable tightness (i.e., the clamping force between the friction plates): too loose will lead to transmission slippage and low efficiency; too tight will accelerate friction plate wear and increase motor load.

[0003] In existing technologies, the adjustment of the clutch of a chain hoist is mostly achieved by directly applying pressure with an end nut. For example, Chinese utility model patent CN203272515U (publication date: 2013.11.06) discloses a "clutch-adjustable electric chain hoist," which directly compresses a disc spring by rotating an adjusting nut at the end of the motor rotor shaft, thereby changing the clutch pressure. Its shortcomings are: 1. Adjustment requires directly overcoming the resistance of the threaded pair and the internal spring force, making operation laborious; 2. Adjustment accuracy depends on the operator's feel, making it difficult to achieve precise and linear control; 3. The adjustment point (nut) is usually located at the axial end of the structure, and its operating position is limited by the overall layout, making adjustment extremely inconvenient in situations with limited space or where it is difficult to access after installation. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing a chain hoist clutch adjustment device, which has the advantages of convenient operation, labor saving, and high adjustment accuracy.

[0005] To solve the above-mentioned technical problems, the objective of this utility model is achieved through the following technical solution: A chain hoist clutch adjustment device includes a gearbox, a clutch assembly is provided inside the gearbox, the output end of the clutch assembly is connected to an output shaft, a bearing sleeve is fitted around the output shaft, a first bearing supporting the output shaft and an oil seal sealing the gearbox are provided inside the bearing sleeve, an external thread section is provided at the end of the bearing sleeve near the clutch assembly, the external thread section is screwed into an internal thread hole in the gearbox, and a transmission tooth is provided on the outer periphery of the end of the bearing sleeve away from the clutch assembly; It also includes a transmission gear and an adjusting gear. The transmission gear meshes with the transmission teeth of the bearing sleeve, and the adjusting gear meshes with the transmission gear. The adjusting gear has an outwardly extending drive end for external tools to drive its rotation.

[0006] In the above-mentioned chain hoist clutch adjustment device, the axes of the bearing sleeve, the transmission gear and the adjustment gear are arranged in parallel and located in the same plane.

[0007] The above-mentioned chain hoist clutch adjustment device also includes a clutch adjustment plate, which is disposed on the outside of the gearbox, and the transmission gear and the adjustment gear are both rotatably disposed on the clutch adjustment plate.

[0008] In the above-mentioned chain hoist clutch adjustment device, a fixed shaft is provided on the clutch adjustment plate, and the transmission gear is located on the inner side of the clutch adjustment plate and is rotatably mounted on the fixed shaft through a second bearing; the fixed shaft may be a pin structure.

[0009] In the above-mentioned chain hoist clutch adjustment device, the adjustment gear passes through the clutch adjustment plate and is supported by a third bearing for rotation. The outer side forms the drive end, and the inner side forms the transmission teeth that mesh with the transmission gear.

[0010] In the aforementioned chain hoist clutch adjustment device, the inner end of the adjustment gear extends inward and is mounted on the gearbox, and a fourth bearing supporting its rotation is provided between the inner end of the adjustment gear and the gearbox.

[0011] In the above-mentioned chain hoist clutch adjustment device, preferably, the second bearing, the third bearing and the fourth bearing are all needle roller bearings.

[0012] In the above-mentioned chain hoist clutch adjustment device, the number of teeth of the adjusting gear is less than the number of teeth of the transmission gear, and the adjusting gear and the transmission gear form a reduction transmission pair.

[0013] In the above-mentioned chain hoist clutch adjustment device, the drive end is hexagonal, and the external tool can be a general-purpose wrench or socket tool.

[0014] Compared with the prior art, this utility model has the following advantages: This invention provides a clutch adjustment device for a chain hoist, employing an adjusting gear-transmission gear transmission adjustment structure. This structure offers smooth transmission, and the fixed lead of the threaded pair achieves a linear correspondence between the rotation angle and the change in clamping force, resulting in high adjustment accuracy and good repeatability. The adjusting gear-transmission gear uses a reduction gear transmission, which requires less effort. The adjusting transmission chain adopts a parallel shaft side-mounted layout, allowing the drive end to be flexibly placed in an easily accessible location such as the side of the gearbox, completely solving the problem of inconvenient traditional end-adjustment operations. Furthermore, the modular adjustment mechanism and exposed adjustment points allow for clutch tightness adjustment and calibration without disassembling the main body of the equipment, greatly simplifying maintenance. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the present invention; Figure 2 This is a perspective view of the adjustment component of this utility model; Reference numerals: 1. Clutch assembly; 2. Output shaft; 3. Bearing sleeve; 4. First bearing; 5. Oil seal; 6. Transmission gear; 7. Adjusting gear; 8. Drive end; 9. Clutch adjusting plate; 10. Fixed shaft; 11. Second bearing; 12. Third bearing; 13. Fourth bearing. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figure 1-2 : A chain hoist clutch adjustment device includes a gearbox, in which a clutch assembly 1 is disposed. The output end of the clutch assembly 1 is connected to an output shaft 2. A bearing sleeve 3 is fitted over the output shaft 2. A first bearing 4 supporting the output shaft 2 and an oil seal 5 sealing the gearbox are disposed inside the bearing sleeve 3. An external thread section is provided at the end of the bearing sleeve 3 near the clutch assembly 1. The external thread section is screwed into an internal thread hole in the gearbox. A transmission tooth is provided on the outer periphery of the end of the bearing sleeve 3 away from the clutch assembly 1. It also includes a transmission gear 6 and an adjusting gear 7. The transmission gear 6 meshes with the transmission teeth of the bearing sleeve 3. The adjusting gear 7 meshes with the transmission gear 6. The number of teeth of the adjusting gear 7 is less than the number of teeth of the transmission gear 6. The adjusting gear 7 and the transmission gear 6 form a reduction transmission pair. The adjusting gear 7 is provided with an outwardly extending drive end 8 for external tools to drive its rotation. The drive end 8 is hexagonal. The external tool can be a general-purpose wrench or socket tool.

[0017] The adjustment principle of this embodiment is as follows: When it is necessary to tighten the clutch, place a standard wrench on the drive end 8 of the adjusting gear 7 and turn the wrench clockwise. The adjusting gear 7 drives the transmission gear 6 to rotate at a higher torque and a lower speed. The transmission gear 6 drives the transmission teeth of the bearing sleeve 3 that meshes with it, causing the bearing sleeve 3 to rotate around the axis of the output shaft 2. Due to the constraint between the external thread section of the bearing sleeve 3 and the fixed internal thread hole of the gearbox, its rotational motion is converted into axial movement. By moving the bearing sleeve 3 axially toward the clutch assembly 1, the clutch assembly 1 can be tightened, increasing the normal pressure between the friction plates, thereby achieving "tightening". When it is necessary to loosen, turn the adjusting gear 7 counterclockwise, and the above process is reversed. The bearing sleeve 3 moves axially toward the outside of the gearbox, releasing the clamping force on the clutch assembly 1. Throughout the entire adjustment stroke, due to the sufficient tooth width design of the transmission teeth on the bearing sleeve 3, it always maintains effective meshing with the transmission gear 6, ensuring continuous and stable power transmission.

[0018] The structure of the bearing sleeve 3 that changes the tightness of the clutch assembly 1 adopts a conventional structure in the art. For example, the bearing sleeve 3 presses against a ball bearing, the inner ring of which is interference-fitted with the output shaft 2 for radial support of the output shaft 2; its outer ring is axially close to the flange of the bearing sleeve 3. The clutch assembly 1 (such as the end pressure plate of the friction plate assembly or related components) is axially adjacent to the end face of the inner ring of the bearing. When the bearing sleeve 3 moves axially toward the clutch assembly 1, its flange pushes the outer ring of the bearing that it is tightly fitted with. The outer ring of the bearing transmits the axial thrust to the inner ring of the bearing through the balls, and the inner ring of the bearing then transmits the axial thrust to the clutch assembly 1 adjacent to its end face, thereby increasing the clamping force between the friction plates and achieving tightening. When moving in the opposite direction, the axial thrust decreases or is released, achieving loosening.

[0019] This embodiment further adopts a modular design. The clutch adjustment device also includes a clutch adjustment plate 9, which is located on the outside of the gearbox. The transmission gear 6 and the adjustment gear 7 are both rotatably mounted on the clutch adjustment plate 9. The specific assembly method is as follows: a fixed shaft 10 is provided on the clutch adjustment plate 9. The transmission gear 6 is located on the inside of the clutch adjustment plate 9 and is rotatably mounted on the fixed shaft 10 through a second bearing 11. The fixed shaft 10 can be a pin structure. The adjustment gear 7 passes through the clutch adjustment plate 9 and is supported for rotation by a third bearing 12. The outer side forms the drive end 8, and the inner side forms the transmission teeth that mesh with the transmission gear 6. The inner end of the adjustment gear 7 extends inward and is mounted on the gearbox. A fourth bearing 13 is provided between the inner end of the adjustment gear 7 and the gearbox to support its rotation. In the above modular design, the axes of the bearing sleeve 3, the transmission gear 6, and the adjustment gear 7 are arranged parallel to each other and located in the same plane.

[0020] Preferably, the first bearing 4 is a deep groove ball bearing, and the second bearing 11, the third bearing 12 and the fourth bearing 13 are all needle roller bearings.

[0021] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A chain hoist clutch adjustment device, comprising a gearbox, wherein a clutch assembly (1) is disposed within the gearbox, and the output end of the clutch assembly (1) is connected to an output shaft (2), characterized in that, The output shaft (2) is fitted with a bearing sleeve (3), and the bearing sleeve (3) is provided with a first bearing (4) supporting the output shaft (2) and an oil seal (5) sealing the gearbox. The bearing sleeve (3) is provided with an external thread section at one end near the clutch assembly (1), and the external thread section is screwed into an internal thread hole in the gearbox. The bearing sleeve (3) is provided with a transmission tooth on the outer periphery at one end away from the clutch assembly (1). It also includes a transmission gear (6) and an adjusting gear (7), wherein the transmission gear (6) meshes with the transmission teeth of the bearing sleeve (3), and the adjusting gear (7) meshes with the transmission gear (6), and the adjusting gear (7) is provided with an outwardly extending drive end (8) for external tools to drive its rotation.

2. The chain hoist clutch adjustment device according to claim 1, characterized in that, The axes of the bearing sleeve (3), transmission gear (6) and adjusting gear (7) are arranged in parallel and located in the same plane.

3. The chain hoist clutch adjustment device according to claim 1, characterized in that, It also includes a clutch adjusting plate (9), which is located on the outside of the gearbox. The transmission gear (6) and the adjusting gear (7) are both rotatably mounted on the clutch adjusting plate (9).

4. The chain hoist clutch adjustment device according to claim 3, characterized in that, The clutch adjusting plate (9) is provided with a fixed shaft (10), and the transmission gear (6) is located inside the clutch adjusting plate (9) and is rotatably mounted on the fixed shaft (10) via the second bearing (11).

5. The chain hoist clutch adjustment device according to claim 3, characterized in that, The adjusting gear (7) is mounted on the clutch adjusting plate (9) and supported by the third bearing (12) for rotation. The outer side forms the driving end (8), and the inner side forms the transmission teeth that mesh with the transmission gear (6).

6. The chain hoist clutch adjustment device according to claim 5, characterized in that, The inner end of the adjusting gear (7) extends inward and is mounted on the gearbox. A fourth bearing (13) supporting its rotation is provided between the inner end of the adjusting gear (7) and the gearbox.

7. The chain hoist clutch adjustment device according to claim 1, characterized in that, The number of teeth of the adjusting gear (7) is less than the number of teeth of the transmission gear (6).

8. The chain hoist clutch adjustment device according to claim 1, characterized in that, The driving end (8) is hexagonal.

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