Low-noise motor spline synchronous transmission structure

Abstract

The utility model discloses a low noise type motor spline synchronous transmission structure, which relates to the technical field of spline synchronous transmission structures, and comprises an inner spline shaft and an outer spline shaft, the outer spline shaft is sleeved in the inner spline shaft, the inner spline shaft is internally and fixedly connected with fixed teeth, the outer spline shaft is externally and fixedly connected with an outer rack, and the outer rack is sleeved in the outer spline shaft. The outer racks and the fixing teeth are distributed correspondingly, adjusting teeth are arranged between the outer racks and the fixing teeth in a sliding mode, second diagonal planes are arranged on the adjusting teeth, first diagonal planes are arranged on the fixing teeth, and the first diagonal planes are matched with the second diagonal planes. According to the low-noise type motor spline synchronous transmission structure, by arranging the adjusting teeth, the outer rack, the fixed teeth and other structures, the buffering effect is achieved, and therefore the stress of the spline is reduced, the service life is prolonged, and operation noise is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of spline synchronous transmission structures, in particular to a low-noise motor spline synchronous transmission structure. Background Art

[0002] Splines are used in coaxial torque transmission situations in rotating machinery. They are made by the cooperation of the teeth of the spline sleeve and the spline shaft. They have a simple structure, mature technology and low cost.

[0003] However, since the effective cooperation of the spline pair requires a certain length, for the convenience of assembly, a certain gap is retained between the tooth sides of the spline shaft and the spline sleeve. Under normal circumstances, when the spline shaft is driven as the active part, the spline shaft and the spline sleeve cooperate as one tooth surface; when the spline sleeve is driven as the active part, the spline sleeve needs to rotate an angle relative to the spline shaft, eliminate the gap between the tooth sides, and then cooperate with the other tooth side surface to drive the spline shaft. During the relative conversion between the active and passive spline shaft and the spline sleeve, the tooth side gap needs to be eliminated before contact is made. There is discontinuity in torque transmission, resulting in impact and noise during power transmission, affecting the smoothness of the overall mechanism, causing faster wear and noise. This situation will increase the tooth side gap of the spline, and the situation will worsen after a long time.

[0004] Therefore, it is necessary to propose a low-noise motor spline synchronous transmission structure to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a low-noise motor spline synchronous transmission structure to solve the problem that during the active and passive relative conversion process between the spline shaft and the spline sleeve, the tooth side clearance needs to be eliminated before contact can be made, and the torque transmission is discontinuous, resulting in impact and noise during the power transmission process, affecting the smoothness of the overall mechanism, causing faster wear and accompanied by noise. This situation will increase the tooth side clearance of the spline, and the situation will worsen after a long time.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a low-noise motor spline synchronous transmission structure, comprising an inner spline shaft and an outer spline shaft, the outer spline shaft is sleeved into the inner spline shaft, the inner part of the inner spline shaft is fixedly connected with a fixed tooth, the outer part of the outer spline shaft is fixedly connected with an external rack, the external rack and the fixed teeth are distributed correspondingly, an adjusting tooth is slidably arranged between the external rack and the fixed teeth, the adjusting tooth is provided with a second beveled surface, the fixed tooth is provided with a first beveled surface, and the first beveled surface cooperates with the second beveled surface.

[0007] Preferably, a buffer assembly is provided between the adjusting tooth and the outer rack, and the buffer assembly includes a first square groove, a sliding rod, a second square groove and a sliding plate, the first square groove is opened on a surface of the outer rack close to the fixed tooth, the second square groove is opened inside the outer rack, the second square groove is connected to the first square groove, the length and width of the second square groove are both greater than the length and width of the first square groove, the sliding plate is slidably connected to the inside of the second square groove, the sliding rod is slidably connected to the inside of the first square groove, and the sliding plate is fixedly connected to the sliding rod.

[0008] Preferably, the buffer assembly further comprises a spring, wherein the spring is located inside the second square groove, one end of the spring is fixedly connected to the slide plate, and the other end of the spring is fixedly connected to the inner wall of the second square groove.

[0009] Preferably, the number of the fixed teeth is multiple and the multiple fixed teeth are evenly distributed, and the number of the external racks is multiple and the multiple external racks are evenly distributed.

[0010] Preferably, an inner toothed rack is provided between each of two adjacent fixed teeth, the inner toothed rack is fixedly connected to the inner spline shaft, and the inner toothed rack is meshed with the outer toothed rack.

[0011] Preferably, an O-ring is provided at the interface between the inner spline shaft and the outer spline shaft.

[0012] Technical effects and advantages of the utility model:

[0013] 1. The utility model achieves a buffering effect by setting structures such as adjusting teeth, external racks and fixed teeth, thereby reducing the force on the spline, extending the service life and reducing operating noise;

[0014] 2. An O-ring is provided at the interface between the inner spline shaft and the outer spline shaft, which can effectively reduce noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the low-noise motor spline synchronous transmission structure of the utility model.

[0016] Figure 2 It is a schematic diagram of the structure of the inner spline shaft and the outer spline shaft of the utility model.

[0017] Figure 3 It is a schematic diagram of the structure of the outer rack, fixed teeth and adjusting teeth of the utility model.

[0018] Figure 4 For this utility model Figure 3 A schematic diagram of the enlarged structure in the middle.

[0019] Figure 5 It is a schematic diagram of the structure of the inner rack and the outer rack of the utility model.

[0020] In the figure: 1. internal spline shaft; 2. external spline shaft; 3. internal rack; 4. external rack; 5. fixed tooth; 6. adjusting tooth; 7. first beveled surface; 8. second beveled surface; 9. first square groove; 10. sliding rod; 11. second square groove; 12. sliding plate; 13. spring; 14. O-ring. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clarify the technical solutions in the embodiments of the utility model; it is completely described. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] The utility model provides Figure 1 to Figure 5 A low-noise motor spline synchronous transmission structure shown in the figure includes an inner spline shaft 1 and an outer spline shaft 2. The outer spline shaft 2 is inserted into the inner spline shaft 1. When in use, the outer spline shaft 2 can be connected to the motor, and the motor drives the outer spline shaft 2 to rotate during operation. The inner spline shaft 1 is fixedly connected with a fixed tooth 5, which is provided in a plurality and evenly distributed. The outer spline shaft 2 is fixedly connected with an outer rack 4, which is provided in a plurality and evenly distributed. The outer rack 4 is distributed correspondingly to the fixed tooth 5.

[0023] An inner rack 3 is disposed between each two adjacent fixed teeth 5 . The inner rack 3 is fixedly connected to the inner spline shaft 1 , and the inner rack 3 is meshed with the outer rack 4 .

[0024] A buffer assembly is provided between the adjustment tooth 6 and the outer rack 4, and the buffer assembly includes a first square groove 9, a slide bar 10, a second square groove 11 and a slide plate 12. The first square groove 9 is provided on a side of the outer rack 4 close to the fixed tooth 5, the second square groove 11 is provided inside the outer rack 4, the second square groove 11 is connected to the first square groove 9, the slide plate 12 is slidably connected inside the second square groove 11, the slide bar 10 is slidably connected inside the first square groove 9, and the slide plate 12 is fixedly connected to the slide bar 10. The length and width of the second square groove 11 are both greater than the length and width of the first square groove 9, so that the slide plate 12 will not slide out.

[0025] The buffer assembly also includes a spring 13 , which is made of a strong material. The spring 13 is located inside the second square groove 11 , one end of the spring 13 is fixedly connected to the slide plate 12 , and the other end of the spring 13 is fixedly connected to the inner wall of the second square groove 11 .

[0026] An adjusting tooth 6 is slidably arranged between the outer rack 4 and the fixed tooth 5 . A second beveled surface 8 is formed on the adjusting tooth 6 . A first beveled surface 7 is formed on the fixed tooth 5 . The first beveled surface 7 matches with the second beveled surface 8 .

[0027] When the motor drives the external spline shaft 2 in the rapid acceleration process, the external rack 4 drives the adjusting tooth 6 to rotate through the slide bar 10. Under the cooperation of the first beveled surface 7 and the second beveled surface 8, the impact force of the external spline shaft 2 and the internal spline shaft 1 first acts between the adjusting tooth 6 and the fixed tooth 5. The adjusting tooth 6 slides inside the second square groove 11 by squeezing the slide plate 12 through the slide bar 10, and compresses the spring 13 to shrink. After eliminating the side clearance between the internal rack 3 and the external rack 4, power transmission is realized. In this process, part of the impact force is absorbed by the spring 13 to achieve a buffering effect, thereby reducing the force on the spline, extending the service life and reducing the operating noise. At the same time, during normal operation, due to torque fluctuations, when the matching surfaces of the internal rack 3 and the external rack 4 produce relative displacement and micro-wear, the displacement can also be absorbed by the spring 13, which also plays a role in avoiding wear, reducing noise and extending service life.

[0028] An O-ring 14 is provided at the interface between the inner spline shaft 1 and the outer spline shaft 2. The O-ring 14 can effectively reduce noise.

Claims

1. A low-noise motor spline synchronous transmission structure, comprising an inner spline shaft (1) and an outer spline shaft (2), characterized in that: The external spline shaft (2) is inserted into the internal spline shaft (1); the internal part of the internal spline shaft (1) is fixedly connected with a fixed tooth (5); the external part of the external spline shaft (2) is fixedly connected with an external rack (4); the external rack (4) and the fixed tooth (5) are distributed correspondingly; an adjusting tooth (6) is slidably arranged between the external rack (4) and the fixed tooth (5); a second beveled surface (8) is provided on the adjusting tooth (6); a first beveled surface (7) is provided on the fixed tooth (5); the first beveled surface (7) matches the second beveled surface (8).

2. A low-noise motor spline synchronous transmission structure according to claim 1, characterized in that: A buffer assembly is arranged between the adjusting tooth (6) and the outer rack (4), and the buffer assembly comprises a first square groove (9), a slide bar (10), a second square groove (11) and a slide plate (12), wherein the first square groove (9) is arranged on a surface of the outer rack (4) close to the fixed tooth (5), the second square groove (11) is arranged inside the outer rack (4), the second square groove (11) is connected to the first square groove (9), the length and width of the second square groove (11) are both greater than the length and width of the first square groove (9), the slide plate (12) is slidably connected inside the second square groove (11), the slide bar (10) is slidably connected inside the first square groove (9), and the slide plate (12) is fixedly connected to the slide bar (10).

3. A low-noise motor spline synchronous transmission structure according to claim 2, characterized in that: The buffer assembly also includes a spring (13), which is located inside the second square groove (11), one end of the spring (13) is fixedly connected to the slide plate (12), and the other end of the spring (13) is fixedly connected to the inner wall of the second square groove (11).

4. A low-noise motor spline synchronous transmission structure according to claim 1, characterized in that: The fixed teeth (5) are provided in a plurality, and the plurality of fixed teeth (5) are evenly distributed; the external racks (4) are provided in a plurality, and the plurality of external racks (4) are evenly distributed.

5. A low-noise motor spline synchronous transmission structure according to claim 4, characterized in that: An inner toothed rack (3) is provided between each of two adjacent fixed teeth (5); the inner toothed rack (3) is fixedly connected to the inner spline shaft (1); and the inner toothed rack (3) is meshed with the outer toothed rack (4).

6. A low-noise motor spline synchronous transmission structure according to claim 1, characterized in that: An O-type sealing ring (14) is provided at the interface between the inner spline shaft (1) and the outer spline shaft (2).

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