A multi-stage transmission mechanism of a hoist reduction gear

Abstract

The application discloses a multi-stage transmission mechanism of a winch speed reducer, which comprises a main shell, left and right end covers and three-stage transmission shafts, the main shell is provided with a partition plate, and the cavity is divided into a worm gear transmission cavity near the left end cover and a cylindrical gear transmission cavity near the right end cover; a motor mounting seat is arranged on the front side of the main shell, a connecting shaft is connected with a motor at one end and a worm section at the other end, and the worm section is engaged with a worm gear on the first-stage transmission shaft; the first-stage transmission shaft penetrates through the partition plate, a first-stage gear shaft of the first-stage transmission shaft is engaged with a first cylindrical gear of the second-stage transmission shaft, a second-stage gear shaft of the second-stage transmission shaft is engaged with a second cylindrical gear of the third-stage transmission shaft, and the third-stage transmission shaft extends to the right end cover and is connected with a winch roller. The connecting shaft is perpendicular to the first-stage transmission shaft, the axis of the third-stage transmission shaft is parallel, and the center lines of the circles form an acute-angled triangle; the end covers and the partition plate are provided with positioning groove seats and mounting hole seats, and are provided with sealing rings and sealing bearings. The mechanism has the advantages of large torque, high efficiency, compact structure, suitability for limited space, strong stability, easy maintenance and applicability to winch lifting operation.

Description

Technical Field

[0001] This application relates to the field of winch reducer transmission technology, and specifically to a multi-stage transmission mechanism for a winch reducer. Background Technology

[0002] As a key piece of equipment in lifting and transportation, the performance of the reducer in a winch directly affects the overall working efficiency and safety of the machine. Existing multi-stage transmission reducers have the following technical shortcomings when adapted to winches:

[0003] While a transmission mechanism using multiple worm gears can provide high torque, it results in a large reducer size, which is difficult to adapt, especially in situations where installation space is limited (such as aerial work platforms).

[0004] Although full worm gear transmission has high torque, it has low efficiency and high energy consumption during long-term operation; while full gear transmission has insufficient torque output for the same volume.

[0005] For example, the multi-stage worm gear transmission mechanism disclosed in patent CN220227683U is relatively large and inefficient; while the gear transmission mechanism in patent CN220910402U has a compact structure, its torque output is limited. Therefore, there is a need to develop a winch reducer transmission mechanism that is compact in size and combines high torque with high efficiency. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this application is to provide a multi-stage transmission mechanism for a winch reducer to solve the problems mentioned in the background art.

[0007] According to one aspect of this application, a multi-stage transmission mechanism for a hoist reducer includes a main housing, a right end cover, a left end cover, a primary transmission shaft, a secondary transmission shaft, and a tertiary transmission shaft. The main housing has a hollow cavity inside. The right end cover is detachably connected to the right end of the main housing, and the left end cover is detachably connected to the left end of the main housing. A partition plate is fixedly provided in the middle of the main housing. The plane of the partition plate is parallel to the planes of the right and left end covers. The partition plate divides the cavity of the main housing into a worm gear transmission cavity and a cylindrical gear transmission cavity. The transmission cavity is located near the left end cover, and the cylindrical gear transmission cavity is located near the right end cover. A motor mounting base is fixedly provided on the front side wall of the main housing. The motor mounting base is used to install a motor. A through hole is provided on the motor mounting base, which communicates with the worm gear transmission cavity. A connecting shaft is rotatably mounted in the through hole via a first sealed bearing. One end of the connecting shaft extends outward and is connected to the motor output shaft. The other end of the connecting shaft extends into the worm gear transmission cavity and is rotatably mounted on the inner side wall of the worm gear transmission cavity via a bearing. The worm gear transmission cavity is located within the worm gear transmission cavity. A worm gear section is fixedly mounted on the connecting shaft, and the worm gear section meshes with a worm wheel for transmission. The worm wheel is fixedly mounted on a primary transmission shaft. The two ends of the primary transmission shaft are rotatably mounted on the right end cover and the left end cover respectively via first positioning bearings. The middle of the primary transmission shaft passes through the partition plate. A second sealing bearing is installed between the primary transmission shaft and the partition plate. A primary gear shaft is fixedly mounted on the primary transmission shaft located in the cylindrical gear transmission cavity. The primary gear shaft meshes with a first cylindrical gear for transmission. The first cylindrical gear is fixedly mounted on the secondary transmission shaft. On the drive shaft, both ends of the secondary drive shaft are rotatably mounted on the partition plate and the right end cover respectively via the second positioning bearing. A secondary gear shaft is also fixedly mounted on the secondary drive shaft. The secondary gear shaft meshes with and is connected to the second cylindrical gear. The second cylindrical gear is fixedly mounted on the tertiary drive shaft. One end of the tertiary drive shaft is rotatably mounted on the partition plate via the third positioning bearing. The other end of the tertiary drive shaft passes through the right end cover and extends outward to connect to the winch drum. A third sealed bearing is installed between the tertiary drive shaft and the right end cover.

[0008] Preferably, the axis of the connecting shaft is perpendicular to the axis of the first-stage transmission shaft, and the connecting shaft is located above the first-stage transmission shaft. The axes of the first-stage transmission shaft, the second-stage transmission shaft, and the third-stage transmission shaft are parallel to each other. The second-stage transmission shafts are all located above the first-stage transmission shaft and the third-stage transmission shaft, and an acute-angled triangle is formed between the lines connecting the centers of the first-stage transmission shaft, the second-stage transmission shaft, and the third-stage transmission shaft.

[0009] Preferably, a bracket is fixedly provided inside the worm gear transmission cavity, and a bearing seat is fixedly provided on the bracket by bolts, and the bearing at the end of the connecting shaft is embedded in the bearing seat.

[0010] Preferably, a right sealing ring is embedded between the edge of the right end cover and the edge of the right end of the main housing, and a left sealing ring is embedded between the edge of the left end cover and the edge of the left end of the main housing.

[0011] Preferably, both the left end cover and the right end cover are fixedly connected to the left and right ends of the main housing by bolts.

[0012] Preferably, the worm gear and the primary drive shaft are fixedly connected by a key and a keyway.

[0013] Preferably, the connecting shaft and the worm gear section are integrally formed, the first-stage transmission shaft and the first-stage gear shaft are integrally formed, the second-stage transmission shaft, the first cylindrical gear and the second-stage gear shaft are integrally formed, and the third-stage transmission shaft and the second cylindrical gear are integrally formed.

[0014] Preferably, the right end cover, the left end cover, and the partition plate are respectively provided with a first positioning groove seat, a second positioning groove seat, and a third positioning groove seat at the positions corresponding to the first positioning bearing, the second positioning bearing, and the third positioning bearing, respectively. The first positioning bearing, the second positioning bearing, and the third positioning bearing are respectively fixedly embedded in the first positioning groove seat, the second positioning groove seat, and the third positioning groove seat. The partition plate and the right end cover are respectively provided with a first mounting hole seat and a second mounting hole seat at the positions corresponding to the second sealing bearing and the second sealing bearing, respectively. The second sealing bearing and the second sealing bearing are respectively fixedly embedded in the first mounting hole seat and the second mounting hole seat.

[0015] The advantages of this application compared to the prior art are as follows: This application discloses a multi-stage transmission mechanism for a winch reducer. This mechanism divides the main housing cavity into a worm gear transmission cavity and a cylindrical gear transmission cavity through a partition plate, forming a combined transmission structure of "worm gear + cylindrical gear". The worm gear transmission section (worm section meshing with worm gear) can fully utilize the high torque advantage of worm gear transmission to meet the high load requirements of winch lifting operations; the subsequent cylindrical gear transmission section (first-stage gear shaft-first cylindrical gear meshing, second-stage gear shaft-second cylindrical gear meshing) utilizes the high efficiency of gear transmission to compensate for... The design overcomes the shortcomings of low efficiency and high energy consumption in long-term operation of worm gear transmissions. By designing the primary, secondary, and tertiary transmission shafts to be parallel to each other, with the secondary transmission shaft located above the primary and tertiary transmission shafts, and the line connecting the centers of the three shafts forming an acute triangle, this layout minimizes the space occupied by the transmission shafts within the housing while ensuring the transmission ratio, thus avoiding the problem of bulky multi-stage worm gear mechanisms. Both the right and left end covers are detachably connected to the main housing by bolts, facilitating the opening of the housing for inspection or replacement of internal worm gears, gears, bearings, and other components. Attached Figure Description

[0016] Figure 1 This is a perspective view of a multi-stage transmission mechanism of a winch reducer according to an embodiment of this application.

[0017] Figure 2 This is a three-dimensional split left-side view of the entire multi-stage transmission mechanism of a winch reducer according to an embodiment of this application.

[0018] Figure 3 This is a three-dimensional, split right-side view of the entire multi-stage transmission mechanism of a winch reducer according to an embodiment of this application.

[0019] Figure 4 This is a right-side view of a multi-stage transmission mechanism of a winch reducer according to an embodiment of this application.

[0020] Figure 5 This is a left-side view of a multi-stage transmission mechanism of a winch reducer according to an embodiment of this application.

[0021] Figure 6 This is a right-side view of the main housing of a multi-stage transmission mechanism of a winch reducer according to an embodiment of this application.

[0022] Figure 7 This is a left-side view of the main housing of a multi-stage transmission mechanism of a winch reducer according to an embodiment of this application.

[0023] Reference numerals: 1. Main housing; 2. Right end cover; 3. Left end cover; 4. First-stage drive shaft; 5. Second-stage drive shaft; 6. Third-stage drive shaft; 7. Partition plate; 8. Worm gear drive cavity; 9. Cylindrical gear drive cavity; 10. Motor mounting base; 11. First sealed bearing; 12. Connecting shaft; 13. Worm section; 14. Worm gear; 15. First positioning bearing; 16. Second sealed bearing; 17. First-stage gear shaft; 18. First cylindrical gear; 19. Second positioning bearing; 20. Second-stage gear shaft; 21. Second cylindrical gear; 22. Third positioning bearing; 23. Third sealed bearing; 24. Bracket; 25. Bearing housing; 26. Right sealing ring; 27. Left sealing ring; 28. First positioning slot seat; 29. ​​Second positioning slot seat; 30. Third positioning slot seat; 31. First mounting hole seat; 32. Second mounting hole seat. Detailed Implementation

[0024] To make the content of this application easier to understand, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to the accompanying drawings. Figure 1 In this context, the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. Furthermore, terms such as "first," "second," etc., are used for descriptive purposes only and should not be interpreted as indicating or implying relative importance.

[0025] like Figures 1 to 7As shown, a multi-stage transmission mechanism for a winch reducer includes a main housing 1, a right end cover 2, a left end cover 3, a first-stage transmission shaft 4, a second-stage transmission shaft 5, and a third-stage transmission shaft 6. The main housing 1 has a hollow cavity inside. The right end cover 2 is detachably connected to the right end of the main housing 1, and the left end cover 3 is detachably connected to the left end of the main housing 1. The left end cover 3 and the right end cover 2 are both fixedly connected to the left and right ends of the main housing 1 by bolts. A right sealing ring 26 is embedded between the edge of the right end cover 2 and the edge of the right end of the main housing 1, and a left sealing ring 27 is embedded between the edge of the left end cover 3 and the edge of the left end of the main housing 1. A partition plate 7 is fixedly provided in the middle of the main housing 1. The plane of the partition plate 7 is parallel to the plane of the right end cover 2 and the left end cover 3. The partition plate 7 divides the cavity of the main housing 1 into a worm gear transmission cavity 8 and a cylindrical gear transmission cavity 9. The worm gear transmission cavity 8 is closer to the left end cover 3, and the cylindrical gear transmission cavity 9 is closer to the right end cover 2. A motor mounting base 10 is fixedly provided on the front side wall of the main housing 1. The motor mounting base 10 is used to install the motor. The motor mounting base 10 has a through hole that connects to the worm gear transmission cavity 8. The motor is rotatably mounted in the through hole through a first sealed bearing 11. There is a connecting shaft 12, one end of which extends outward and is connected to the motor output shaft. The other end of the connecting shaft 12 extends into the worm gear transmission cavity 8 and is fitted with a bearing. A bracket 24 is fixed on the inner wall of the worm gear transmission cavity 8. A bearing seat 25 is fixed on the bracket 24 by bolts. The bearing at the end of the connecting shaft 12 is embedded in the bearing seat 25. A worm section 13 is fixed on the connecting shaft 12 located in the worm gear transmission cavity 8. The connecting shaft 12 and the worm section 13 are integrally formed structures. The worm section 13 meshes with the worm gear 14 for transmission. A worm gear 14 is fixedly mounted on a primary drive shaft 4, and the worm gear 14 and the primary drive shaft 4 are fixedly connected by a key and keyway. The two ends of the primary drive shaft 4 are rotatably mounted on the right end cover 2 and the left end cover 3 respectively via first positioning bearings 15. A partition plate 7 passes through the middle of the primary drive shaft 4, and a second sealing bearing 16 is installed between the primary drive shaft 4 and the partition plate 7. A primary gear shaft 17 is fixedly mounted on the primary drive shaft 4 located within the cylindrical gear transmission cavity 9. The primary drive shaft 4 and the primary gear shaft 17 are integrally formed. The primary gear shaft 17 meshes with a first cylindrical gear 18, which is fixedly mounted on a secondary drive shaft 5. The two ends of the secondary drive shaft 5 are rotatably mounted on the partition plate 7 and the right end cover 2 respectively via second positioning bearings 19. A secondary gear shaft 20 is also fixedly mounted on the secondary drive shaft 5. The secondary drive shaft 5, the first cylindrical gear 18, and the secondary gear shaft 20 are integrally formed.The secondary gear shaft 20 meshes with the second cylindrical gear 21 for transmission. The second cylindrical gear 21 is fixedly installed on the tertiary transmission shaft 6. The tertiary transmission shaft 6 and the second cylindrical gear 21 are integrally formed. One end of the tertiary transmission shaft 6 is rotatably installed on the partition plate 7 through the third positioning bearing 22. The other end of the tertiary transmission shaft 6 passes through the right end cover 2 and extends outward to connect to the winch drum. A third sealing bearing 23 is installed between the tertiary transmission shaft 6 and the right end cover 2.

[0026] In this design, the main housing 1 cavity is divided into a worm gear transmission cavity 8 and a cylindrical gear transmission cavity 9 by a partition plate 7, forming a combined transmission structure of "worm gear 14 + cylindrical gear": the worm gear 14 transmission section (worm section 13 meshes with worm gear 14) can give full play to the high torque advantage of worm gear 14 worm transmission to meet the high load requirements of winch lifting operations; the subsequent cylindrical gear transmission section (first stage gear shaft 17-first cylindrical gear 18 meshes with second stage gear shaft 20-second cylindrical gear 21) takes advantage of the high efficiency of gear transmission to make up for the defects of low efficiency and high energy consumption of the entire worm gear 14 worm transmission.

[0027] A right sealing ring 26 is embedded between the right end cover 2 and the main housing 1, and a left sealing ring 27 is embedded between the left end cover 3 and the main housing 1. Sealed bearings are used at the joints between the connecting shaft 12, the first-stage transmission shaft 4, the third-stage transmission shaft 6 and the housing / end cover. The multi-seal structure can effectively prevent the leakage of lubricating oil in the housing, while avoiding the entry of external dust and moisture into the cavity, reducing the risk of rust and wear of parts, and extending the maintenance cycle and overall service life of the mechanism.

[0028] Both the right end cover 2 and the left end cover 3 are detachably connected to the main housing 1 by bolts, which facilitates opening the housing to inspect or replace internal parts such as the worm gear 14, gears, and bearings. In addition, the connecting shaft 12 and the worm section 13, the first-stage transmission shaft 4 and the first-stage gear shaft 17, the second-stage transmission shaft 5 and the first cylindrical gear 18 / second-stage gear shaft 20, and the third-stage transmission shaft 6 and the second cylindrical gear 21 are all integrally molded, which reduces the number of parts to be assembled and the assembly error, and reduces the risk of failure caused by assembly gaps.

[0029] The axis of connecting shaft 12 is perpendicular to the axis of the primary drive shaft 4, and connecting shaft 12 is located above the primary drive shaft 4. The axes of the primary drive shaft 4, the secondary drive shaft 5, and the tertiary drive shaft 6 are parallel to each other. The secondary drive shaft 5 is located above the primary drive shaft 4 and the tertiary drive shaft 6, and the lines connecting the centers of the primary drive shaft 4, the secondary drive shaft 5, and the tertiary drive shaft 6 form an acute triangle. In this design, by having the axes of the primary drive shaft 4, the secondary drive shaft 5, and the tertiary drive shaft 6 parallel to each other, and the secondary drive shaft 5 located above the primary and tertiary drive shafts 6, and the lines connecting their centers forming an acute triangle, this layout, while ensuring the transmission ratio, minimizes the space occupied by the drive shafts within the housing, avoiding the problem of the large size of multiple worm gear 14 worm mechanisms.

[0030] The right end cover 2, the left end cover 3, and the partition plate 7 are respectively provided with a first positioning groove seat 28, a second positioning groove seat 29, and a third positioning groove seat 30 at the positions corresponding to the first positioning bearing 15, the second positioning bearing 19, and the third positioning bearing 22. The first positioning bearing 15, the second positioning bearing 19, and the third positioning bearing 22 are respectively fixedly embedded in the first positioning groove seat 28, the second positioning groove seat 29, and the third positioning groove seat 30. The partition plate 7 and the right end cover 2 are respectively provided with a first mounting hole seat 31 and a second mounting hole seat 32 at the positions corresponding to the second sealing bearing 16. The second sealing bearing 16 is respectively fixedly embedded in the first mounting hole seat 31 and the second mounting hole seat 32. In this design, the parallelism of the axes of the first to third stage transmission shafts 6 is ensured by the precise installation of "slot seat / hole seat + bearing", avoiding meshing deviation caused by axis offset during transmission; the end of the connecting shaft 12 is fixed to the bearing seat 25 by the bracket 24, which further improves the meshing accuracy of the worm section 13 and the worm wheel 14, reduces vibration and wear, and ensures transmission smoothness.

[0031] The above embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them. Although the embodiments of this application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features, without departing from the spirit and scope defined by the claims of this application.

Claims

1. A multi-stage transmission mechanism of a hoist reduction gear, comprising a main housing (1), a right end cover (2), a left end cover (3), a first-stage transmission shaft (4), a second-stage transmission shaft (5) and a third-stage transmission shaft (6), characterized in that, The main housing (1) has a hollow cavity inside. The right end cover (2) is detachably connected to the right end of the main housing (1), and the left end cover (3) is detachably connected to the left end of the main housing (1). A partition plate (7) is fixedly provided in the middle of the main housing (1). The plane of the partition plate (7) is parallel to the plane of the right end cover (2) and the left end cover (3). The partition plate (7) divides the cavity of the main housing (1) into a worm gear transmission cavity (8) and a cylindrical gear transmission cavity (9). The worm gear transmission cavity (8) is close to the left end cover (3), and the cylindrical gear transmission cavity (9) is close to the right end cover (2). A motor mount is fixedly provided on the front side wall of the main housing (1). Mounting base (10), the motor mounting base (10) is used to install the motor. The motor mounting base (10) has a through hole, the through hole is connected to the worm gear transmission cavity (8). A connecting shaft (12) is rotatably installed in the through hole through a first sealed bearing (11). One end of the connecting shaft (12) extends outward and is connected to the motor output shaft. The other end of the connecting shaft (12) extends into the worm gear transmission cavity (8) and is rotatably installed on the inner wall of the worm gear transmission cavity (8) through a bearing. A worm section (13) is fixedly provided on the connecting shaft (12) located in the worm gear transmission cavity (8). The worm section (13) is meshed and connected to the worm wheel (14). 4) A primary drive shaft (4) is fixedly mounted on the first-stage drive shaft (4). The two ends of the primary drive shaft (4) are rotatably mounted on the right end cover (2) and the left end cover (3) respectively via a first positioning bearing (15). The middle part of the primary drive shaft (4) passes through the partition plate (7). A second sealing bearing (16) is installed between the primary drive shaft (4) and the partition plate (7). A primary gear shaft (17) is fixedly mounted on the primary drive shaft (4) located in the cylindrical gear transmission cavity (9). The primary gear shaft (17) meshes with the first cylindrical gear (18) for transmission. The first cylindrical gear (18) is fixedly mounted on the secondary drive shaft (5). The two ends of the secondary drive shaft (5) are... The two ends are respectively rotatably mounted on the partition plate (7) and the right end cover (2) via the second positioning bearing (19). The second-stage transmission shaft (5) is also fixedly provided with a second-stage gear shaft (20). The second-stage gear shaft (20) meshes with the second cylindrical gear (21) for transmission. The second cylindrical gear (21) is fixedly mounted on the third-stage transmission shaft (6). One end of the third-stage transmission shaft (6) is rotatably mounted on the partition plate (7) via the third positioning bearing (22). The other end of the third-stage transmission shaft (6) passes through the right end cover (2) and extends outward to connect to the winch drum. A third sealed bearing (23) is installed between the third-stage transmission shaft (6) and the right end cover (2).

2. A multi-stage transmission mechanism of a hoist reduction gear according to claim 1, characterized in that, The axis of the connecting shaft (12) is perpendicular to the axis of the first-stage transmission shaft (4), and the connecting shaft (12) is located above the first-stage transmission shaft (4). The axes of the first-stage transmission shaft (4), the second-stage transmission shaft (5), and the third-stage transmission shaft (6) are parallel to each other. The second-stage transmission shaft (5) is located above the first-stage transmission shaft (4) and the third-stage transmission shaft (6), and an acute triangle is formed between the lines connecting the centers of the first-stage transmission shaft (4), the second-stage transmission shaft (5), and the third-stage transmission shaft (6).

3. A multi-stage transmission mechanism of a hoist reduction gear according to claim 1, wherein A bracket (24) is fixedly provided on the inner wall of the worm gear transmission cavity (8), and a bearing seat (25) is fixedly provided on the bracket (24) by bolts. The bearing at the end of the connecting shaft (12) is embedded in the bearing seat (25).

4. The multi-stage transmission mechanism of a hoist reduction gear according to claim 1, wherein A right sealing ring (26) is embedded between the edge of the right end cover (2) and the edge of the right end of the main housing (1), and a left sealing ring (27) is embedded between the edge of the left end cover (3) and the edge of the left end of the main housing (1).

5. The multi-stage transmission mechanism of a winch reducer according to claim 1, characterized in that, The left end cover (3) and the right end cover (2) are both fixedly connected to the left and right ends of the main housing (1) by bolts.

6. The multi-stage transmission mechanism of a winch reducer according to claim 1, characterized in that, The worm gear (14) and the primary drive shaft (4) are fixedly connected by a key and a keyway.

7. The multi-stage transmission mechanism of a winch reducer according to claim 1, characterized in that, The connecting shaft (12) and the worm section (13) are integrally formed, the first-stage transmission shaft (4) and the first-stage gear shaft (17) are integrally formed, the second-stage transmission shaft (5) and the first cylindrical gear (18) and the second-stage gear shaft (20) are integrally formed, and the third-stage transmission shaft (6) and the second cylindrical gear (21) are integrally formed.

8. The multi-stage transmission mechanism of a winch reducer according to claim 1, characterized in that, The right end cover (2), the left end cover (3), and the partition plate (7) are respectively provided with a first positioning groove seat (28), a second positioning groove seat (29), and a third positioning groove seat (30) at the positions corresponding to the first positioning bearing (15), the second positioning bearing (19), and the third positioning bearing (22). The first positioning bearing (15), the second positioning bearing (19), and the third positioning bearing (22) are respectively fixedly embedded in the first positioning groove seat (28), the second positioning groove seat (29), and the third positioning groove seat (30). The partition plate (7) and the right end cover (2) are respectively provided with a first mounting hole seat (31) and a second mounting hole seat (32) at the positions corresponding to the second sealing bearing (16). The second sealing bearing (16) and the second sealing bearing (16) are respectively fixedly embedded in the first mounting hole seat (31) and the second mounting hole seat (32).

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