Spline transmission mechanism of zero-back-clearance motor main shaft

Abstract

The utility model discloses a zero backlash motor main shaft spline transmission mechanism, relates to spline transmission mechanism technical field, including spline shaft and spline housing, the spline housing is sleeved outside spline shaft in sliding mode, the inner wall of spline housing is provided with limit slot, the inside of limit slot is provided with latch, and the latch is provided with the backlash motor main shaft spline transmission mechanism. The clamping teeth comprise long strip parts and triangular parts, the long strip parts and the triangular parts are integrally formed and fixedly connected to the spline shaft, a round sleeve is arranged in the spline sleeve in a sliding mode, and clamping blocks are arranged in the limiting grooves and fixedly connected to the round sleeve. According to the zero-back-clearance motor spindle spline transmission mechanism, by arranging the long strip part, the triangular part, the clamping block, the clamping groove and other structures, as the triangular part abuts against the interior of the clamping groove all the time, torque transmission is continuous, impact and noise generated in the power transmission process are reduced, and the smoothness of the whole mechanism is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of spline transmission mechanisms, in particular to a zero-backlash motor spindle spline transmission mechanism. Background Art

[0002] Zero backlash refers to a common industrial deceleration device. When the coupling is rotating in the forward direction, if the rotation direction is suddenly changed, if there is a gap in the middle elastic body of the coupling, there will be a momentary no-load phenomenon. This return gap will cause a series of adverse effects such as loss of transmission torque and reduced control accuracy. Therefore, backlash should be avoided as much as possible in precision transmission.

[0003] When the zero backlash motor is used, the tooth side clearance needs to be eliminated before the spline shaft and spline sleeve can be contacted during the relative conversion between active and passive. The torque transmission is discontinuous, which causes 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 over time.

[0004] Therefore, it is necessary to propose a zero backlash motor spindle spline transmission mechanism to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a zero backlash motor main shaft spline transmission mechanism to solve the problem that when the zero backlash motor is used, the spline shaft and the spline sleeve need to eliminate the tooth side clearance before contacting during the active and passive relative conversion process, and the torque transmission is discontinuous, resulting in impact and noise during the power transmission process, affecting the smoothness of the overall mechanism, causing rapid 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 zero backlash motor spindle spline transmission mechanism, comprising a spline shaft and a spline sleeve, the spline sleeve sliding sleeve is arranged on the outside of the spline shaft, a limiting groove is provided on the inner wall of the spline sleeve, a latch tooth is arranged inside the limiting groove, the latch tooth comprises a long strip portion and a triangular portion, the long strip portion and the triangular portion are integrally formed, the long strip portion and the triangular portion are both fixedly connected to the spline shaft, a circular sleeve is slidingly provided inside the spline sleeve, a latch block is provided inside the limiting groove, the latch block is fixedly connected to the circular sleeve, a latch groove is provided at one end of the latch block close to the latch tooth, the latch groove is in a V-shaped structure, and the triangular portion abuts against the inside of the latch groove.

[0007] Preferably, the limiting grooves are provided in plurality, and the plurality of limiting grooves are distributed in a circular array around the inner wall of the spline sleeve.

[0008] Preferably, the slot includes a first inclined wall and a second inclined wall, and the angle between the first inclined wall and the second inclined wall is degrees.

[0009] Preferably, a buffer assembly is provided between the circular sleeve and the inner wall of the spline sleeve.

[0010] Preferably, the buffer assembly includes a round seat and a spring, the round seat is located on the side of the round sleeve facing away from the spline shaft, the round seat is fixedly connected to the inner wall of the spline sleeve, the spring is located between the round sleeve and the round seat, one end of the spring is fixedly connected to the round sleeve, and the other end of the spring is fixedly connected to the round seat.

[0011] Preferably, a round rod is fixedly connected to the spline shaft, a round hole is opened on the round sleeve for the round rod to pass through, one end of the round rod away from the spline shaft is inserted into the round seat, the round rod is rotatably connected to the round seat, and the spring is sleeved on the outside of the round rod.

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

[0013] 1. The utility model is provided with a strip part, a triangular part, a clamping block and a clamping slot. Since the triangular part is always in contact with the inside of the clamping slot, the torque transmission is continuous, the impact and noise generated during the power transmission process are reduced, and the smoothness of the overall mechanism is improved;

[0014] 2. The slot is V-shaped, and continuous torque transmission can be achieved by rotating it clockwise or counterclockwise. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the zero backlash motor spindle spline transmission mechanism of the utility model.

[0016] Figure 2 It is a schematic cross-sectional structure diagram of the zero backlash motor spindle spline transmission mechanism of the utility model.

[0017] Figure 3 This is a schematic diagram of the structure of the spline shaft and spline sleeve of the utility model.

[0018] Figure 4 This is a schematic diagram of the circular sleeve and the clamping block structure of the utility model.

[0019] In the figure: 1, spline shaft; 2, spline sleeve; 3, long strip part; 4, round sleeve; 5, round seat; 6, round rod; 7, spring; 8, block; 9, slot; 10, triangular part; 11, limit slot; 12, latch tooth; 13, first inclined wall; 14, second inclined wall. DETAILED DESCRIPTION

[0020] 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.

[0021] The utility model provides Figure 1 to Figure 4 A zero backlash motor spindle spline transmission mechanism shown includes a spline shaft 1 and a spline sleeve 2, and the spline sleeve 2 is slidably sleeved on the outside of the spline shaft 1. A limit groove 11 is provided on the inner wall of the spline sleeve 2, and a plurality of limit grooves 11 are provided, and the plurality of limit grooves 11 are distributed in a circular array around the inner wall of the spline sleeve 2. A latch tooth 12 is provided inside the limit groove 11, and the latch tooth 12 includes a long strip portion 3 and a triangular portion 10, and the long strip portion 3 and the triangular portion 10 are integrally formed, and the long strip portion 3 and the triangular portion 10 are both fixedly connected to the spline shaft 1. Since a certain length is required for the effective cooperation between the spline shaft 1 and the spline sleeve 2, a certain gap needs to be retained between the limit groove 11 and the latch tooth 12 for the convenience of assembly. When in use, the spline shaft 1 or the spline sleeve 2 is connected to the zero backlash motor spindle.

[0022] Taking into account that during the active and passive relative conversion of the spline shaft 1 and the spline sleeve 2, it is necessary to eliminate the gap between the limit groove 11 and the latch tooth 12 before contact is made, there is discontinuity in the torque transmission, which leads to impact and noise in the power transmission process, affecting the smoothness of the overall mechanism. In order to improve the efficiency of use, a circular sleeve 4 is provided for internal sliding of the spline sleeve 2, and a clamping block 8 is provided inside the limit groove 11. The clamping block 8 is fixedly connected to the circular sleeve 4. A clamping groove 9 is provided at one end of the clamping block 8 close to the latch tooth 12. The clamping groove 9 has a V-shaped structure, and the triangular part 10 abuts against the inside of the clamping groove 9. The clamping groove 9 includes a first inclined wall 13 and a second inclined wall 14. The angle between the first inclined wall 13 and the second inclined wall 14 is 60 degrees, which can improve the stability of the fit. At the same time, the angle between the first inclined wall 13 and the second inclined wall 14 can be adjusted according to the specific usage. During the active and passive relative conversion of the spline shaft 1 and the spline sleeve 2, before the limit groove 11 and the latching tooth 12 are eliminated, the triangular part 10 is always in contact with the inside of the latching groove 9, so that the torque transmission is continuous, the impact and noise generated during the power transmission process are reduced, and the smoothness of the overall mechanism is improved.

[0023] The latching tooth 12 first squeezes the block 8 through the triangular part 10 to move away from the spline shaft 1, and then the latching tooth 12 contacts the limiting groove 11; and the groove 9 is a V-shaped structure, and continuous torque transmission can be achieved by rotating clockwise or counterclockwise.

[0024] A buffer assembly is provided between the round sleeve 4 and the inner wall of the spline sleeve 2, and the buffer assembly includes a round seat 5 and a spring 7. The round seat 5 is located on the side of the round sleeve 4 facing away from the spline shaft 1, the round seat 5 is fixedly connected to the inner wall of the spline sleeve 2, the spring 7 is located between the round sleeve 4 and the round seat 5, one end of the spring 7 is fixedly connected to the round sleeve 4, and the other end of the spring 7 is fixedly connected to the round seat 5.

[0025] During operation, during the active and passive relative conversion of the spline shaft 1 and the spline sleeve 2, before the limiting groove 11 and the latching tooth 12 are eliminated, under the elastic force of the spring 7, the triangular part 10 always abuts against the inside of the latching groove 9, so that the torque transmission is continuous; then the latching tooth 12 first squeezes the block 8 through the triangular part 10 to move away from the spline shaft 1, and squeezes the spring 7 to contract, and then the latching tooth 12 contacts with the limiting groove 11.

[0026] To improve the stability of use, a round rod 6 is fixedly connected to the spline shaft 1, and a round hole is opened on the round sleeve 4 for the round rod 6 to pass through. The end of the round rod 6 away from the spline shaft 1 is inserted into the round seat 5, and the round rod 6 is rotatably connected to the round seat 5. The spring 7 is sleeved on the outside of the round rod 6.

Claims

1. A zero-backlash motor spindle spline transmission mechanism, comprising a spline shaft (1) and a spline sleeve (2), characterized in that: The spline sleeve (2) is slidably sleeved on the outside of the spline shaft (1); a limiting groove (11) is provided on the inner wall of the spline sleeve (2); a latching tooth (12) is provided inside the limiting groove (11); the latching tooth (12) comprises a long strip portion (3) and a triangular portion (10); the long strip portion (3) and the triangular portion (10) are integrally formed; the long strip portion (3) and the triangular portion (10) are both fixedly connected to the spline shaft (1); a circular sleeve (4) is slidably provided inside the spline sleeve (2); a latching block (8) is provided inside the limiting groove (11); the latching block (8) is fixedly connected to the circular sleeve (4); a latching groove (9) is provided at one end of the latching block (8) close to the latching tooth (12); the latching groove (9) is of a V-shaped structure; the triangular portion (10) abuts against the inside of the latching groove (9).

2. A zero backlash motor spindle spline transmission mechanism according to claim 1, characterized in that: The limiting grooves (11) are arranged in a plurality, and the plurality of limiting grooves (11) are distributed in a circular array around the inner wall of the spline sleeve (2).

3. The zero backlash motor spindle spline transmission mechanism according to claim 1, characterized in that: The clamping slot (9) comprises a first inclined wall (13) and a second inclined wall (14), and the angle between the first inclined wall (13) and the second inclined wall (14) is 60 degrees.

4. The zero backlash motor spindle spline transmission mechanism according to claim 1, characterized in that: A buffer component is provided between the circular sleeve (4) and the inner wall of the spline sleeve (2).

5. A zero backlash motor spindle spline transmission mechanism according to claim 4, characterized in that: The buffer assembly comprises a round seat (5) and a spring (7); the round seat (5) is located on the side of the round sleeve (4) facing away from the spline shaft (1); the round seat (5) is fixedly connected to the inner wall of the spline sleeve (2); the spring (7) is located between the round sleeve (4) and the round seat (5); one end of the spring (7) is fixedly connected to the round sleeve (4); and the other end of the spring (7) is fixedly connected to the round seat (5).

6. A zero backlash motor spindle spline transmission mechanism according to claim 5, characterized in that: A round rod (6) is fixedly connected to the spline shaft (1), a round hole for the round rod (6) to pass through is opened on the round sleeve (4), one end of the round rod (6) away from the spline shaft (1) is inserted into the round seat (5), the round rod (6) is rotatably connected to the round seat (5), and the spring (7) is sleeved on the outer side of the round rod (6).

Images