Rotating mechanism with low back clearance

Abstract

The utility model discloses a rotating mechanism with low back clearance, which adopts a rotating device comprising a first synchronous wheel, a second synchronous wheel and a synchronous belt which is sleeved on the first synchronous wheel and the second synchronous wheel in a tensioning manner, and adopts the first synchronous wheel smaller than the second synchronous wheel to reduce the back clearance generated by a driving device as much as possible so as to reduce the error. The transmission efficiency and accuracy are ensured, meanwhile, the use of metal parts is reduced by adopting the synchronous belt, and the noise generated during transmission is reduced.

Description

Technical Field

[0001] The utility model relates to the field of transmission machines, in particular to a low backlash rotating mechanism. Background Art

[0002] Backlash is a performance parameter in a speed reducer, referring to the gap between the gears in the gear transmission mechanism. Backlash exists primarily to ensure smooth operation of the gears during transmission, preventing them from becoming stuck or overtightened due to heat expansion during operation.

[0003] However, in the fields of precision mechanics and robotics, backlash is a crucial concept because it can cause unintended or uncontrolled motion in mechanical transmission systems, directly impacting control system accuracy and equipment performance. Excessive backlash can reduce control system accuracy, affecting equipment performance and reliability. Therefore, controlling backlash is an important step in improving mechanical system accuracy. Utility Model Content

[0004] Purpose of the invention: The purpose of the present invention is to reduce the error caused by backlash during precision transmission as much as possible, thereby providing a low-backlash rotating mechanism.

[0005] A low backlash rotary mechanism adopts the following technical solution:

[0006] A low-backlash rotary mechanism comprises an input shaft and an output shaft, wherein a reducer and a transmission device are provided between the input shaft and the output shaft, and the input shaft, the reducer, the transmission device and the output shaft are connected in sequence;

[0007] Reducer: including housing, first shaft and second shaft;

[0008] Transmission device: includes a first synchronous wheel, a second synchronous wheel, and a synchronous belt tensioned between the first synchronous wheel and the second synchronous wheel;

[0009] The reducer is provided with a mounting position for the first synchronous wheel, and the output shaft is provided with a mounting position for the second synchronous wheel.

[0010] By adopting the above technical solution, the input shaft is transmitted to the output shaft through the belt in the transmission device, avoiding the use of metal parts and avoiding backlash caused by wear or pressure of metal parts; the belt tensioning sleeve is arranged on the first synchronous wheel and the second synchronous wheel to ensure transmission efficiency while reducing noise.

[0011] Furthermore, the reducer includes a housing, the first shaft is rotatably disposed inside the housing, a thread is provided on the portion of the first shaft disposed inside the housing, and the first shaft also includes an installation length extending out of the housing and cooperating with the input shaft.

[0012] Furthermore, the second shaft includes a first portion disposed inside the housing and a second portion outside the housing.

[0013] Furthermore, the first synchronous wheel is disposed on the second portion of the second shaft.

[0014] Preferably, the reducer may be a worm gear reducer.

[0015] By adopting the above technical solution, the pressure between the gear and the thread on the shaft is reduced, which can effectively reduce the backlash caused by excessive pressure. When the reducer is a worm gear reducer, it can increase the torque, increase the load, provide self-locking, and change the transmission direction.

[0016] Furthermore, the output shaft is arranged at the center of the second synchronous wheel.

[0017] Furthermore, the first synchronizing wheel and the second synchronizing wheel are on the same plane.

[0018] Furthermore, the diameter of the first synchronizing wheel is smaller than the diameter of the second synchronizing wheel.

[0019] Preferably, the first synchronizing wheel and the second synchronizing wheel both have replacement parts of different specifications.

[0020] By adopting the above technical solution, the transmission efficiency between the first synchronous wheel and the second synchronous wheel is improved and the transmission loss is reduced.

[0021] Furthermore, a coupling is provided at the connection between the reducer and the output shaft.

[0022] By adopting the above technical solution, the shaft of the reducer and the output shaft are connected through a coupling so that they rotate together and transmit torque, thereby realizing mechanical transmission of the two shafts.

[0023] In summary, this application has at least one of the following beneficial effects:

[0024] 1. Using a synchronous wheel to reduce the speed of the reducer and the output shaft to reduce the backlash of the reducer can effectively avoid the backlash caused by deformation caused by excessive pressure on the contact surface between metal parts;

[0025] 2. By using a transmission device, the transmission between metal parts is reduced, the transmission efficiency is improved while minimizing the backlash, and the noise during the transmission process is reduced;

[0026] 3. Use worm gear reducer to increase torque, increase load, provide self-locking, and change transmission direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1It is an overall diagram of the utility model;

[0028] Figure 2 It is a top view of the utility model;

[0029] Figure 3 It is a cross-sectional view of point A of the present utility model;

[0030] Figure 4 It is a cross-sectional view of point B of the present utility model.

[0031] Reference numerals: 1 input shaft; 2 speed reducer; 21 housing; 22 first shaft; 23 second shaft; 231 first part; 232 second part; 3 transmission device; 31 first synchronous wheel; 32 second synchronous wheel; 33 synchronous belt; 4 output shaft; 5 coupling. DETAILED DESCRIPTION

[0032] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Example 1

[0034] refer to Figure 1 A low backlash rotating mechanism includes an input shaft 1, a reducer 2, a transmission device 3 and an output shaft 4 connected in sequence. The input shaft 1 is connected to the first shaft 22 of the reducer 2 through a coupling 5. When the input shaft 1 rotates, the coupling 5 can drive the first shaft 22 to rotate along the direction of rotation of the input shaft 1.

[0035] Combine Figure 1 、 2 The first shaft 22 of the reducer 2 is arranged inside the housing 21 , and the first shaft 22 also has an installation length extending out of the housing 21 to cooperate with the input shaft 1 .

[0036] Combine Figure 1 、 3 4. A second shaft 23 is provided in the shell 21. The second shaft 23 has a first portion 231 located inside the shell 21 and a second portion 232 outside the shell 21. The first portion 231 of the second shaft 23 is provided with a thread that is threadedly engaged with the first shaft 22. The first shaft 22 and the second shaft 23 are perpendicular to each other. When the first shaft 22 transmits power to the second shaft 23, the second shaft 23 rotates.

[0037] Recombination Figure 1 、 2The second shaft 23 connects to the first synchronous gear 31 at its center, and the output shaft 4 connects to the second synchronous gear 32. A timing belt 33 is tensioned between the first and second synchronous gears 31, 32. The diameter of the first synchronous gear 31 is smaller than that of the second synchronous gear 32. When the second shaft 23 drives the first synchronous gear 31 to rotate, it can also drive the second synchronous gear 32 to rotate. When backlash occurs in the system, the first shaft 22 experiences an angular offset. Because the first synchronous gear 31 is smaller than the second synchronous gear 32 and the first and second synchronous gears 31, 32 are connected by the timing belt 33, the angular offset generated by the first synchronous gear 31 is reduced by the second synchronous gear 32, reducing the impact of backlash on the transmission.

[0038] Example 2

[0039] Referring to the solution in Example 1, replacing the reducer 2 with a worm gear reducer 2 can further reduce the backlash generated by the transmission between the first shaft 22 and the second shaft 23. The rest of the implementation is the same as that of Example 1.

[0040] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A low backlash rotary mechanism comprising an input shaft and an output shaft, characterized in that: A reducer and a transmission device are provided between the input shaft and the output shaft, and the input shaft, the reducer, the transmission device and the output shaft are connected in sequence; Reducer: including housing, first shaft and second shaft; Transmission device: includes a first synchronous wheel, a second synchronous wheel, and a synchronous belt tensioned between the first synchronous wheel and the second synchronous wheel; The first synchronous wheel is arranged on the reducer, and the second synchronous wheel is arranged on the output shaft.

2. A low backlash rotary mechanism according to claim 1, characterized in that: Furthermore, the reducer includes a housing, the first shaft is rotatably disposed inside the housing, a thread is provided on the portion of the first shaft disposed inside the housing, and the first shaft also includes an installation length extending out of the housing and cooperating with the input shaft.

3. A low backlash rotary mechanism according to claim 2, characterized in that: The second shaft includes a first portion disposed within the housing and a second portion outside the housing.

4. A low backlash rotary mechanism according to claim 3, characterized in that: The first synchronous wheel is passed through the second portion of the second shaft.

5. The low backlash rotary mechanism according to claim 1, characterized in that: The output shaft is arranged at the center of the second synchronous wheel.

6. A low backlash rotary mechanism according to claim 5, characterized in that: The first synchronous wheel and the second synchronous wheel are on the same plane.

7. A low backlash rotary mechanism according to claim 6, characterized in that: The diameter of the first synchronous wheel is smaller than the diameter of the second synchronous wheel.

8. The low backlash rotary mechanism according to claim 1, characterized in that: A coupling is provided at the connection between the reducer and the output shaft.

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