CN201129416Y - A new type of cycloid steel ball reducer - Google Patents

Abstract

The utility model relates to a novel cycloidal steel ball reducer, which belongs to the technical field of mechanical manufacturing. It is composed of an input part and an output part meshed. Its main technical feature is that an eccentric shaft is provided at one end of the input shaft, and a dynamic cycloid disc is provided on the eccentric shaft through a bearing. The center of the cycloidal groove is provided with an oil storage tank with a concave section, and the other end surface of the cycloidal disc is provided with a circular steel ball socket, which is evenly distributed on the same radius of the dynamic cycloidal disc. The input shaft and The output shaft is rollingly connected by the fixed cycloid disk, the movable cycloid disk and the steel ball. The utility model has the advantages of simple structure, small volume, flexible operation, low noise, fast heat dissipation, high power transmission efficiency and low manufacturing cost. It is widely used in the field of automatic mechanical transmission technology.

Description

A new type of cycloid steel ball reducer

1. Technical field

The utility model relates to a speed reducer, in particular to a novel cycloid steel ball speed reducer, which belongs to the technical field of mechanical transmission device manufacturing.

2. Background technology

At present, most of the reducers we use are gear devices, and their structure is that gear teeth are provided on the circumference of the cylinder, and the purpose of deceleration is achieved by meshing with different numbers of teeth. This kind of reducer has a relatively stable reduction ratio and reliable operation, but it has a large volume and weight, requires a large amount of steel raw materials, and has high manufacturing costs. Moreover, this kind of reducer works with a lot of noise and vibration. Because of the above defects of the gear reducer, people invented and developed the pulley reducer, ball reducer, electromagnetic reducer and cycloid reducer. Compared with the gear reducer, this kind of reducer expands the transmission ratio range, reduces the volume and weight, greatly reduces the noise and vibration, reduces the manufacturing cost of the reducer, improves the work efficiency, and improves the service life of the reducer. extend.

And the cycloid reducer closest to the utility model is to process cycloid grooves on the end faces of two discs, and the meshing is driven by steel balls between the two cycloid grooves, but this cycloid reducer During the use of the device, the axial pretension device is prone to loosening due to vibration during operation. The heat generated by the friction of the circular shell is not easy to dissipate during work, and the side of the track that is stressed near the top of the tooth is easy to wear during overload operation, and the track is prone to deformation, so that the gap between the track and the ball becomes larger. Looseness and noise are generated.

3. Contents of utility model

The purpose of this utility model is to solve the problems existing in the structural design of the current cycloidal reducer, which is easy to loose during use, and the heat is not easy to dissipate, so as to provide a new technical solution.

In order to achieve the above object, the utility model can be realized through the following schemes:

A new type of cycloid steel ball reducer, which is composed of an input part and an output part. The input part is provided with a shaft hole at one end of the casing, and a fixed cycloid disk, an input shaft, a steel ball and a moving shaft are installed in the shaft hole. Cycloid disk, the output part is provided with a shaft hole at the other corresponding end of the housing, and a dynamic cycloid disk, steel balls and output shaft are arranged in the shaft hole, and the input shaft and output shaft are connected through the dynamic cycloid disk and the steel ball. Rolling connection, an eccentric shaft e (e is the eccentricity) is provided at the right end of the input shaft, and a dynamic cycloid disk is installed on the eccentric shaft through a bearing, and a cycloid groove is made on one end surface of the dynamic cycloid disk. Cycloidal grooves are also made on the corresponding end faces of the disk and the dynamic cycloidal disk, and steel balls are installed between the cycloidal grooves of the fixed cycloidal disk and the dynamic cycloidal disk; An annular socket with a diameter of 2e is made on one end surface, and a steel ball socket is made on the end surface of the output shaft corresponding to the cycloid disk, and the W output mechanism is formed after the steel ball is embedded.

The cycloid groove on one end surface of the movable cycloid disk and the cycloid groove on the corresponding end surface of the fixed cycloid disk are annular in shape, and a concave oil storage tank is provided at the bottom of the cycloid groove for oil storage and mating Partially lubricate. A thrust nut is arranged axially on the output shaft.

The utility model has the advantages of simple structure, small size, light weight, low cost, long service life, stable and flexible operation during operation, high transmission efficiency, no looseness during use, and very good heat dissipation effect. The utility model is widely used in the occasions requiring relatively small volume, relatively large transmission ratio and mainly transferring motion, such as robots, medical equipment, servo systems, and aerospace vehicles.

4. Description of drawings

Accompanying drawing 1 is a kind of structural representation of embodiment of the utility model;

Accompanying drawing 2 is the enlarged schematic view of the structure of the cycloid disc (5) in the accompanying drawing 1 of the utility model;

Accompanying drawing 3 is the right view structural representation of accompanying drawing 2 of the utility model cycloid disc (5);

Accompanying drawing 4 is the left view structural representation of accompanying drawing 2 of the utility model cycloid disc (5).

5. Specific implementation

The utility model is described in further detail with specific embodiment now in conjunction with accompanying drawing:

In the utility model, shaft holes are arranged at the corresponding two ends of the housing, and an input part is arranged in one shaft hole; an output part is arranged in the other shaft hole. The input part is composed of the input shaft 1, the bearing and the cycloid disk 5, the input shaft 1 is fixedly connected with the bearing cover 2 through the bearing, and the bearing cover 2 plays a role of sealing and fastening here; the output part is composed of the dynamic cycloid disk 5, Steel ball 4, counterweight 6, output shaft 14 are made up, output shaft 14 is fastened by bearing 8,10 and preload nut 13, sealing ring 11 is housed between bearing 10 and preload nut 13. Bearings 8 and 10 play a supporting role here, and a thrust nut 12 is provided on the preload nut 13 . The deceleration part composed of the moving cycloid disk 5 with the cycloid groove 15, the fixed cycloid disk 3 and a certain number of steel balls 4 is made on the surface corresponding to the fixed cycloid disk 3. This embodiment is provided with twelve steel ball sockets 17 and is made up of twelve steel balls. One side of the moving cycloid disk 5 is provided with a closed annular cycloidal groove 15, and the other side is made with an annular steel ball socket 17 on the same radius, and its size is determined by the radius of the steel ball. When the input shaft 1 rotates, the eccentric shaft on it is driven by the rotating arm bearing to make the cycloid disc 5 revolve. The inner and outer cycloid grooves carved on the end faces of the two cycloid discs form a closed circular track, the steel ball 4 in the circular track is purely rolling, and the moving cycloid disc 5 is fixed on the shell 7, forcing the swing The coil 5 rotates around its own axis while revolving, thereby forming a planetary motion and realizing a deceleration motion. The other end surface of the cycloid disk 5 is made with a steel socket 17 with a diameter of 2e (e is the eccentricity), and the opposite end surface of the output shaft 14 is engraved with twelve steel ball sockets, which form a W output after the steel balls are embedded. mechanism. The annular groove and steel ball socket are designed according to the principle of parallelogram mechanism to ensure the correctness of motion transmission. Under the movement of the steel ball 4 , the movement of the cycloid disc 5 is transmitted to the output shaft 14 , thereby realizing the low-speed rotation of the output shaft 14 . A bolt 9 is provided at the lower end of the housing 7 to unload oil. A thrust nut 12 is installed in the axial direction of the output shaft 14, so that the thrust nut 12 and the original preload nut 13 play a role of parallel tightening, which solves the problem of axial looseness caused by vibration during the movement of the reducer. The vibration is reduced, the friction is also reduced, and the heat generated by the vibration is naturally reduced. At the bottom of the cycloidal groove 15, an oil storage tank 16 with a concave cross-section is added to store oil, lubricate the meshing parts, and reduce heat generation of the reducer. The experiment proves that: under the loading test state, compared with the prior art, the oil temperature is lowered by 10°C, and the noise is lowered by 5dB.

Claims (3)

1. A new type of cycloidal steel ball reducer, which is composed of an input part and an output part. The input part is provided with a shaft hole at one end of the casing (7), and a fixed cycloid disc (3) is installed in the shaft hole. , the input shaft (1), the steel ball (4) and the cycloid disc (5), the output part is provided with a shaft hole at the other corresponding end of the housing (7), and the shaft hole is provided with a cycloid disc ( 5), the steel ball (4) and the output shaft (14), the input shaft (1) and the output shaft (14) are rollingly connected through the cycloid disk (5) and the steel ball (4), and the characteristics are: The right end of the shaft (1) is provided with an eccentric shaft e (e is the eccentric distance), on which a dynamic cycloid disk (5) is installed through a bearing, and a cycloid groove is made on one end surface of the dynamic cycloid disk (5) (15), the end face corresponding to the fixed cycloid disk (3) and the dynamic cycloid disk (5) is also made with a cycloid groove, and the cycloid of the fixed cycloid disk (3) and the dynamic cycloid disk (5) A steel ball (4) is installed between the groove and the cycloidal groove; an annular socket (17) with a diameter of 2e is made on the other end surface of the cycloidal disk (5), and an annular socket (17) with a diameter of 2e is made between the output shaft (14) and the cycloidal A steel ball socket is made on the corresponding end surface of the disk (5), and the W output mechanism is formed after the steel ball is embedded. 2. A new type of cycloidal steel ball reducer according to claim 1, characterized in that: the cycloidal groove (15) and the fixed cycloidal disc (3) on one end surface of the movable cycloidal disc (5) The cycloid groove on the corresponding end face is annular in shape, and a concave oil storage tank (16) is provided at the bottom of the cycloid groove (15). 3. A new cycloidal steel ball reducer according to claim 1 or 2, characterized in that: a thrust nut (12) is provided in the axial direction of the output shaft (14).

Images