Axial clearance adjusting device for speed reducer

Abstract

The utility model discloses an axial clearance adjusting device for a speed reducer, which relates to the technical field of speed reducers and comprises a shell, a movable turntable is arranged in the shell, and a transmission disc is rotatably arranged on one side, far away from a threaded rod, of the turntable. The side, close to the rotary disc, of the transmission disc is provided with two first gears which are connected in a meshed mode, the two first gears are correspondingly located at the axis position and the off-axis position of the rotary disc respectively, and the first gear located at the axis position of the rotary disc is fixedly connected with the transmission disc and is coaxially arranged with the transmission disc. A driven assembly is arranged on the side, away from the transmission disc, of the end, along the axis, of the first gear at the off-axis position of the rotary disc, and a planet assembly is arranged on the side, away from the rotary disc, of the transmission disc.

Description

Technical Field

[0001] This utility model relates to the field of speed reducer technology, specifically to an axial clearance adjustment device for a speed reducer. Background Technology

[0002] A speed reducer is an independent component consisting of gear drives, worm drives, or gear-worm drives enclosed in a rigid housing. It is commonly used as a speed reduction transmission device between a prime mover and a driven machine. It plays a role in matching speeds and transmitting torque between the prime mover and the driven machine or actuator, and its applications are extremely widespread in modern machinery.

[0003] In the prior art, patent announcement number CN115095650A discloses a planetary reducer with adjustable axial clearance, including a housing, a mounting base fixedly installed inside the housing, an input shaft rotatably mounted on the mounting base, one end of the input shaft rotatably extending out of the housing, and a sun gear fixedly fitted on one end of the input shaft; a gear sleeve is fixedly installed on the inner circumference of the housing, and the gear sleeve is connected to a planetary gear adjustable along the length direction of the gear sleeve via the sun gear;

[0004] While the above solution offers many advantages, it also has the following drawbacks: the device uses the engagement of a threaded rod and a connecting block to adjust the position of the transmission disc. However, since the threaded rod is located on one side of the transmission disc, the force on the transmission disc shifts or tilts to one side, resulting in different force intensities at different angles. Over time, this can cause the transmission disc to tilt or deform, thus reducing the practicality and service life of the axial clearance adjustment device used in the reducer.

[0005] Therefore, it is necessary to design an axial clearance adjustment device for speed reducers to improve their service life. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing an axial clearance adjustment device for a speed reducer, thereby solving the problems mentioned in the background section.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an axial clearance adjustment device for a speed reducer, comprising a housing, a movable turntable disposed inside the housing, a transmission disc rotatably disposed on the side of the turntable away from the threaded rod, two meshing first gears disposed on the side of the transmission disc near the turntable, the two first gears being respectively located at the axis center and off-axis center of the turntable, the first gear located at the axis center of the turntable being fixedly connected to the transmission disc and coaxially disposed, a driven component disposed on the side of the first gear off-axis center of the turntable away from the transmission disc along the axis, and a planetary assembly disposed on the side of the transmission disc away from the turntable.

[0008] The present invention further describes that the driven component includes a drive shaft, one end of which passes through the turntable and is fixedly connected to the first gear at the off-center. The driven shaft is slidably sleeved on the end of the drive shaft away from the first gear. The cross-sectional shape of the drive shaft is a regular hexagonal structure. A hexagonal cavity is correspondingly opened on the end of the driven shaft near the drive shaft. The drive shaft slides in the hexagonal cavity. The end of the driven shaft away from the drive shaft passes through the housing and is rotatably connected to the housing.

[0009] The present invention further describes that the planetary assembly includes a sun gear and a gear sleeve. The gear sleeve is fixedly connected to the inner wall of the housing. The sun gear is located at the center inside the gear sleeve and is coaxially arranged with the gear sleeve. Two planetary gears are meshed between the gear sleeve and the sun gear. An input shaft is fixedly connected to the end of the sun gear away from the transmission disk. The outer side of the input shaft away from the sun gear penetrates the housing. The two planetary gears are rotatably connected to a drive shaft at the end of their axes near the turntable. One end of the drive shaft is fixedly connected to the transmission disk.

[0010] This utility model further illustrates that the length of the gear sleeve along the axial direction is greater than the length of the sun gear along the axial direction, and the length of the sun gear along the axial direction is greater than the length of the planetary gear along the axial direction.

[0011] The present invention further describes that the turntable has guide holes arranged in a circular array on its outer side, and guide rods are slidably connected in the guide holes, with both ends of the guide rods fixedly connected to the inner wall of the housing.

[0012] The present invention further describes that a threaded rod is fixedly connected to one end of the turntable at the center, and a threaded tube is threadedly sleeved on the outer side of the threaded rod, and the threaded tube is rotatably connected to the inner wall of the housing.

[0013] This utility model further illustrates that a worm gear is fixedly sleeved at the end of the threaded tube away from the threaded rod, a worm is meshed with one side of the worm gear, the worm is rotatably connected to the inner wall of the housing, the worm and the threaded tube are arranged perpendicular to each other, and a rotating block is fixedly connected at the end of the worm that passes through the housing.

[0014] Compared with existing technologies, the beneficial effects achieved by this invention are as follows: This invention, by rotating the worm gear to drive the worm wheel and the thread mechanism, causes the turntable and the connected planetary gear set to slide axially, allowing for axial adjustment of the meshing position of the planetary gears. When a certain part of the tooth surface of the planetary gear, sun gear, or gear sleeve is severely worn, this adjustment function can be used to move the meshing point of the gear pair to an unworn or lightly worn tooth surface area to continue operation. This effectively avoids the scrapping of the entire gear due to localized wear, greatly improving the overall service life of the reducer. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a side sectional view of the overall structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the turntable and the first gear structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the turntable and the first gear of this utility model.

[0020] Figure 5 This is a schematic diagram of the driven component and planetary component structure of this utility model;

[0021] In the diagram: 1. Housing; 2. Turntable; 3. Guide hole; 4. Guide rod; 5. Threaded rod; 6. Threaded tube; 7. Worm gear; 8. Worm; 9. Rotary block; 10. Transmission disc; 11. First gear; 12. Driven assembly; 13. Planetary assembly; 14. Transmission shaft; 15. Driven shaft; 16. Round opening; 17. Sun gear; 18. Gear sleeve; 19. Planetary gear; 20. Input shaft; 21. Drive shaft. Detailed Implementation

[0022] The following detailed, non-limiting description of the present invention, in conjunction with preferred embodiments and accompanying drawings, is provided. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0023] Please see Figure 1-5 The present invention provides a technical solution: an axial clearance adjustment device for a speed reducer, comprising a housing 1, a turntable 2 disposed inside the housing 1, the turntable 2 being able to slide within the housing 1, specifically, a guide hole 3 distributed in a circular array is provided on the outer side of the turntable 2, a guide rod 4 is slidably connected within the guide hole 3, and both ends of the guide rod 4 are fixedly connected to the inner wall of the housing 1.

[0024] A threaded rod 5 is fixedly connected to one end of the turntable 2 at the center. A threaded tube 6 is threadedly sleeved on the outside of the threaded rod 5. The threaded tube 6 is rotatably connected to the inner wall of the housing 1.

[0025] A worm gear 7 is fixedly sleeved at the end of the threaded tube 6 away from the threaded rod 5. A worm 8 is meshed with one side of the worm gear 7. The worm 8 is rotatably connected to the inner wall of the housing 1. The worm 8 and the threaded tube 6 are arranged perpendicular to each other. A rotating block 9 is fixedly connected at the end of the worm 8 away from the worm gear 7 after passing through the housing 1.

[0026] A transmission disk 10 is rotatably mounted on the side of the turntable 2 away from the threaded rod 5. Two first gears 11 are provided on the side of the transmission disk 10 close to the turntable 2, and the two first gears 11 are respectively located at the axis and the off-axis of the turntable 2.

[0027] Among them, the first gear 11 located at the center of the turntable 2 is fixedly connected to the transmission disk 10 and is set on the same axis.

[0028] A driven component 12 is provided on one end of the first gear 11 at the off-center of the turntable 2, away from the transmission disk 10, and a planetary component 13 is provided on the side of the transmission disk 10 away from the turntable 2.

[0029] Driven component 12 includes drive shaft 14, one end of drive shaft 14 passes through turntable 2 and is fixedly connected to first gear 11 at the off-center.

[0030] A driven shaft 15 is slidably sleeved at the end of the drive shaft 14 away from the first gear 11. The cross-sectional shape of the drive shaft 14 is a regular hexagonal structure. A hexagonal cavity is correspondingly opened at the end of the driven shaft 15 close to the drive shaft 14. The drive shaft 14 slides in the hexagonal cavity.

[0031] A through-hole 16 is provided at the corresponding position of the drive shaft 14 and the turntable 2. The drive shaft 14 is located inside the 16 and does not contact the inner wall of the 16.

[0032] One end of the driven shaft 15, away from the transmission shaft 14, extends out of the housing 1 and is rotatably connected to the housing 1.

[0033] The planetary assembly 13 includes a sun gear 17 and a gear sleeve 18. The gear sleeve 18 is fixedly connected to the inner wall of the housing 1. The sun gear 17 is located at the center inside the gear sleeve 18 and is coaxially arranged with the gear sleeve 18. Two planetary gears 19 are meshed between the gear sleeve 18 and the sun gear 17.

[0034] An input shaft 20 is fixedly connected to the end of the sun gear 17 away from the transmission disk 10, and the outer side of the input shaft 20 away from the sun gear 17 penetrates the housing 1.

[0035] Both planetary gears 19 are rotatably connected to drive shafts 21 at one end of their axis near the turntable 2, and one end of the drive shafts 21 is fixedly connected to the transmission disc 10.

[0036] The length of the gear sleeve 18 along the axial direction is greater than the length of the sun gear 17 along the axial direction, and the length of the sun gear 17 along the axial direction is greater than the length of the planet gear 19 along the axial direction.

[0037] In this embodiment, the rotating block 9 drives the rotating worm 8, which in turn drives the threaded tube 6 to rotate via the worm wheel 7. The threaded tube 6 drives the threaded rod 5 to move along its axial direction, and then continues to drive the turntable 2 to slide within the housing 1 along the axial direction of the guide rod 4. This causes the transmission disk 10 and the drive shaft 21 to continue to drive the planetary gear 19 to slide within the gear sleeve 18, thereby changing the contact position between the planetary gear 19 and the sun gear 17 and the gear sleeve 18.

[0038] When a gear on planetary assembly 13 is severely worn, it can continue to operate by adjusting its meshing position in the axial direction, thereby increasing the service life of the reducer.

[0039] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has 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. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An axial clearance adjustment device for a speed reducer, characterized in that: The device includes a housing (1), inside which is a movable turntable (2). A transmission disk (10) is rotatably mounted on the side of the turntable (2) away from the threaded rod (5). Two meshing first gears (11) are mounted on the side of the transmission disk (10) near the turntable (2). The two first gears (11) are respectively located at the axis and off-axis of the turntable (2). The first gear (11) located at the axis of the turntable (2) is fixedly connected to the transmission disk (10) and is coaxially mounted. A driven component (12) is mounted on the side of the first gear (11) off-axis away from the transmission disk (10) along the axis. A planetary component (13) is mounted on the side of the transmission disk (10) away from the turntable (2).

2. The axial clearance adjustment device for a speed reducer according to claim 1, characterized in that: The driven component (12) includes a drive shaft (14). One end of the drive shaft (14) passes through the turntable (2) and is fixedly connected to the first gear (11) at the off-center. The end of the drive shaft (14) away from the first gear (11) is slidably fitted with a driven shaft (15). The cross-sectional shape of the drive shaft (14) is a regular hexagonal structure. The end of the driven shaft (15) close to the drive shaft (14) is provided with a corresponding hexagonal cavity. The drive shaft (14) slides in the hexagonal cavity. The end of the driven shaft (15) away from the drive shaft (14) passes through the housing (1) and is rotatably connected to the housing (1).

3. The axial clearance adjustment device for a speed reducer according to claim 2, characterized in that: The planetary assembly (13) includes a sun gear (17) and a gear sleeve (18). The gear sleeve (18) is fixedly connected to the inner wall of the housing (1). The sun gear (17) is located at the center inside the gear sleeve (18) and is coaxial with the gear sleeve (18). The gear sleeve (18) and the sun gear (17) are meshed with two planetary gears (19). The end of the sun gear (17) away from the transmission disk (10) is fixedly connected to an input shaft (20). The side of the input shaft (20) away from the sun gear (17) penetrates the housing (1). The two planetary gears (19) are rotatably connected to a drive shaft (21) at the end of the axis close to the turntable (2). One end of the drive shaft (21) is fixedly connected to the transmission disk (10).

4. The axial clearance adjustment device for a speed reducer according to claim 3, characterized in that: The length of the gear sleeve (18) along the axial direction is greater than the length of the sun gear (17) along the axial direction, and the length of the sun gear (17) along the axial direction is greater than the length of the planetary gear (19) along the axial direction.

5. The axial clearance adjustment device for a speed reducer according to claim 4, characterized in that: The turntable (2) has guide holes (3) arranged in a circular array on the outside. A guide rod (4) is slidably connected in the guide hole (3). Both ends of the guide rod (4) are fixedly connected to the inner wall of the housing (1).

6. The axial clearance adjustment device for a speed reducer according to claim 5, characterized in that: A threaded rod (5) is fixedly connected to one end of the turntable (2) at the center. A threaded tube (6) is threaded on the outside of the threaded rod (5). The threaded tube (6) is rotatably connected to the inner wall of the housing (1).

7. An axial clearance adjusting device for a speed reducer according to claim 6, characterized in that: The threaded tube (6) is fixedly fitted with a worm gear (7) at one end away from the threaded rod (5). A worm (8) is meshed with one side of the worm gear (7). The worm (8) is rotatably connected to the inner wall of the housing (1). The worm (8) and the threaded tube (6) are arranged perpendicular to each other. The end of the worm (8) away from the worm gear (7) passes through the housing (1) and is fixedly connected with a rotating block (9).

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