CN207935369U - a kind of transmission device - Google Patents

Abstract

The utility model discloses a transmission device for a piston pump, which comprises a box body, an inner ring gear, a main shaft, a motor and an output shaft; the motor is fixedly connected with the box body, the rear end of the main shaft is connected with the motor shaft of the motor, and the front end of the main shaft passes The bearing is installed in the box, and the inner ring gear is fixed on the inner wall of the box and is located between the main shaft and the motor; there is an eccentric mounting hole on the front end of the main shaft, and the output shaft is installed in the eccentric mounting hole of the main shaft through the bearing; the front end of the output shaft is provided with The output interface, the output interface is installed eccentrically on the front end of the output shaft, the middle part of the output shaft is provided with a gear part, the gear part protrudes from the main shaft and meshes with the inner ring gear, and the rear end of the output shaft is assembled and connected with the rear end of the main shaft through a bearing. The utility model converts the rotary motion of the motor into linear motion by utilizing the gears and the eccentric structure meshing with each other.

Description

a transmission

technical field

The utility model relates to a transmission device, which can change the motion mode, and converts the rotational motion of a motor into linear reciprocating motion by using mutually meshing gears and an eccentric structure.

Background technique

The transmission device used in the past piston pump has problems such as high cost, short life, high noise, and unstable lifting pressure.

Contents of the invention

In order to solve the above problems existing in the prior art, the utility model provides a transmission device, which converts the rotational motion of the motor into linear reciprocating motion by using mutually meshing gears and an eccentric structure, and can also convert the linear reciprocating motion according to needs Output for rotary motion.

The purpose of this utility model is achieved through the following technical solutions, in conjunction with the accompanying drawings:

A transmission device, comprising a box body 1, an inner ring gear 2, a main shaft 3, a motor 5, a bearing 6, and an output shaft 7; the motor 5 is fixedly connected to the box body 1, the rear end of the main shaft 3 is connected to the motor shaft of the motor 5, and the main shaft The front end is installed in the box body 1 through the bearing 6, the inner ring gear 2 is fixed on the inner wall of the box body 1 and is located between the main shaft and the motor; the front end of the main shaft is provided with an eccentric mounting hole 32, and the output shaft 7 is installed on the side of the main shaft 3 through the bearing. In the eccentric mounting hole 32; the front end of the output shaft 7 is provided with an output interface 71, the output interface 71 is eccentrically installed on the front end of the output shaft, the middle part of the output shaft 7 is provided with a gear part 73, the gear part 73 protrudes from the main shaft and meshes with the ring gear 2 , the rear end of the output shaft 7 is assembled and connected with the rear end of the main shaft 3 through a bearing.

Further, the front end of the main shaft is the front end flange 31 of the main shaft, the eccentric mounting hole 32 is arranged on the front end flange 31 of the main shaft, a hollow part 33 is provided in the middle part of the main shaft 3 corresponding to the ring gear 2, and the output shaft 7 The gear part 73 is clamped at the hollow part 33 of the main shaft, so that the gear part 73 can partially protrude from the hollow part 33 and mesh with the ring gear 2 .

Further, the front end of the output shaft 7 is provided with an output shaft flange 72 , and the output interface 71 is eccentrically mounted on the output shaft flange 72 .

Further, the number of teeth of the inner ring gear 2 is twice the number of teeth of the gear part 73 of the output shaft. Whenever the motor 5 drives the main shaft 3 to rotate x° clockwise or counterclockwise, the output shaft 7 will rotate counterclockwise or clockwise. Turn 2x°.

Further, the eccentricity between the eccentric mounting hole 32 on the main shaft and its axis is equal to the eccentricity between the output interface 71 of the output shaft and the axis of the output shaft flange 72 .

Further, the motor 5 is a brushless DC motor.

The utility model provides a transmission device, which converts the rotary motion of the motor into a linear motion by using mutually meshing gears and an eccentric structure. The service life of the piston pump is greatly improved.

Description of drawings

Fig. 1 is the structural axonometric schematic diagram of the utility model;

Fig. 2 is a front sectional view of the utility model structure;

Fig. 3 is the structural cross-sectional view of the utility model after removing the motor;

Fig. 4 is the axonometric schematic view of the output shaft structure of the utility model;

Fig. 5 (a) is the front view of the utility model output shaft structure;

Fig. 5 (b) is a left half sectional view of Fig. 5 (a);

Fig. 6 (a) is the front view of the utility model inner ring gear structure;

Fig. 6 (b) is a left side sectional view of Fig. 6 (a);

Fig. 7 is the axonometric schematic diagram of the spindle structure of the utility model;

Fig. 8 is a front sectional view of the main shaft of the present invention;

Fig. 9 (a) is a schematic diagram of the motion track position of the output shaft output interface of the utility model;

Fig. 9 (b) is the second schematic diagram of the motion track position of the output shaft output interface of the utility model;

Fig. 9 (c) is a schematic diagram of the third position of the motion trajectory of the output shaft output interface of the utility model;

Fig. 9 (d) is a schematic diagram of the four schematic diagrams of the motion track position of the output shaft output interface of the utility model;

In the picture:

1-box, 2-internal gear, 3-main shaft, 31-front flange of main shaft, 32-eccentric mounting hole, 33-hollowout, 4-transfer shaft, 5-motor, 6-bearing, 7-output Shaft, 71-output interface, 72-output shaft flange, 73-gear part, A-internal ring gear index circle, B-gear part gear index circle

Detailed ways

Introduce the technical scheme of the utility model in detail below in conjunction with accompanying drawing:

As shown in Figures 1 to 8, a transmission device is composed of a box body 1, an inner ring gear 2, a main shaft 3, an adapter shaft 4, a motor 5, a bearing 6, and an output shaft 7. The motor 5 is fixedly connected to the box body 1, the rear end of the main shaft 3 is connected to the motor shaft of the motor 5 through the adapter shaft 4, the front flange 31 of the main shaft is installed in the box body 1 through the bearing 6, and the inner ring gear 2 is fixed in the box body 1 The inner wall is located behind the flange 31 at the front end of the main shaft. An eccentric mounting hole 32 is provided on the end face of the main shaft front end flange 31, a hollow part 33 is provided at the corresponding position between the main shaft 3 and the ring gear 2, an output shaft flange 72 is provided at the front end of the output shaft 7, and an output shaft flange 72 is provided on the output shaft flange 72. There is an output interface 71, and the output interface 71 is eccentrically installed on the output shaft flange 72; the middle part of the output shaft 7 is provided with a gear part 73, and the output shaft 7 is installed in the eccentric mounting hole 32 of the main shaft 3 through a bearing, and the gear part of the output shaft 7 73 is clamped at the hollow part 33 of the main shaft, so that the gear part 73 can protrude from the hollow part 33 and mesh with the ring gear 2, and the rear end of the output shaft 7 is assembled with the rear end of the main shaft 3 through a bearing.

As shown in Figure 9(a) to Figure 9(d), the number of teeth of the inner ring gear 2 is twice the number of teeth of the output shaft gear part 73, and the motor 5 drives the main shaft 3 to rotate x° clockwise or counterclockwise, and the output shaft 7 will turn 2x° counterclockwise or clockwise.

As shown in Figure 9(a) to Figure 9(d), the eccentric distance between the eccentric mounting hole 32 on the main shaft and its axis is equal to the eccentric distance between the output interface 71 of the output shaft and the axis of the output shaft flange 72, that is, eccentric The eccentric distance between the mounting hole and the output interface is equal, therefore, when the motor drives the main shaft to rotate, the output interface 71 of the output shaft will perform linear reciprocating motion.

The motor 5 is a brushless DC motor.

The tank 1 can be the casing of a piston pump.

Briefly introduce the working principle of the present utility model below:

The motor 5 drives the main shaft 3 to rotate, and then drives the output shaft 7 to rotate together, so that the gear part 73 of the output shaft 7 is engaged with the ring gear 2 for transmission. Since the number of teeth of the ring gear 2 is twice the number of teeth of the gear part 73 of the output shaft, therefore , every time the motor 5 drives the main shaft 3 to rotate x° clockwise or counterclockwise, the output shaft 7 will rotate 2x° counterclockwise or clockwise; The distances are equal, therefore, when the motor drives the main shaft to rotate, the output interface 71 of the output shaft performs linear reciprocating motion. The output interface is used to radially connect the piston rod of the piston pump, thus driving the piston rod to perform linear reciprocating motion synchronously with the output interface.

Claims (6)

1. A transmission device, characterized in that it comprises a casing (1), an internal ring gear (2), a main shaft (3), a motor (5), an output shaft (7); the motor (5) and the casing (1 ) is fixedly connected, the rear end of the main shaft (3) is connected to the motor shaft of the motor (5), the front end of the main shaft is installed in the box body (1) through bearings, and the inner ring gear (2) is fixed on the inner wall of the box body (1) and is located on the main shaft between the motor and the motor; an eccentric mounting hole (32) is provided on the front end of the main shaft, and the output shaft (7) is installed in the eccentric mounting hole (32) of the main shaft (3) through a bearing; an output interface is provided at the front end of the output shaft (7) (71), the output interface (71) is eccentrically installed on the front end of the output shaft, the middle part of the output shaft (7) is provided with a gear part (73), the gear part (73) protrudes from the main shaft and meshes with the ring gear (2), the output shaft (7) The rear end is assembled and connected with the rear end of the main shaft (3) through a bearing. 2. A transmission device according to claim 1, characterized in that the front end of the main shaft is a front end flange (31) of the main shaft, and the eccentric mounting hole (32) is arranged on the front end flange (31) of the main shaft, A hollow part (33) is provided in the middle part of the main shaft (3) corresponding to the ring gear (2), and the gear part (73) of the output shaft (7) is snapped into the hollow part (33) of the main shaft, so that the gear part ( 73) It can partially protrude from the hollow part (33) and mesh with the ring gear (2). 3. A transmission device according to claim 1, characterized in that, the front end of the output shaft (7) is provided with an output shaft flange (72), and the output interface (71) is eccentrically mounted on the output shaft flange (72). )superior. 4. A transmission device as claimed in claim 1, characterized in that, the number of teeth of the internal ring gear (2) is twice the number of teeth of the output shaft gear part (73), and the motor (5) drives the main shaft (3 ) rotate x° clockwise or counterclockwise, the output shaft (7) will rotate 2x° counterclockwise or clockwise. 5. A transmission device according to claim 1, characterized in that, the eccentric distance between the eccentric mounting hole (32) on the main shaft and its axis center, the output interface (71) of the output shaft and the flange of the output shaft (72) The eccentric distances between the axes are equal. 6. A transmission device according to claim 1, characterized in that the motor (5) is a brushless DC motor.