Improved motor connection assembly for a speed reducer

Abstract

The utility model discloses an improved reducer motor connecting assembly relates to a connecting structure of reducer and motor, and its purpose is to provide a kind of installation convenient, error small, low in cost's reducer motor connecting assembly.The utility model discloses an improved reducer motor connecting assembly including motor, reducer and wave generator, and the one side of the wave generator installation of reducer body is provided with connecting flange, and the inside of connecting flange is provided with the cylindrical surface of positioning, motor is fixedly connected with connecting flange, and the cylindrical surface cooperation of the outside of boss on motor and the inside of connecting flange is installed, wave generator is installed on reducer, and is connected with motor, and wave generator and motor are located the same side of the reducer body.

Description

Technical Field

[0001] This utility model relates to the field of speed reducer technology, and in particular to an improved speed reducer motor connection assembly. Background Technology

[0002] Robots are used in industries, military, medical, educational and entertainment fields, and can perform a variety of tasks such as welding, painting, assembly, handling, testing, reconnaissance, surveillance, attack and mine clearance.

[0003] In existing technologies, common industrial robot joints often employ harmonic reducers, driven by servo motors to achieve high torque and low speed rotation. However, due to machining and assembly errors in the harmonic reducer, motor, and related connecting parts, the connection between the motor and the harmonic reducer often fails to form a coaxial connection, causing robot joint vibration and abnormal robot noise, thus affecting production and use.

[0004] The above situation can be addressed by improving the machining and assembly precision of harmonic reducers, motors, and related connecting parts. However, this would lead to a significant increase in costs, which is impractical for businesses.

[0005] like Figure 3 The diagram shows an assembly schematic of a Harmonic Drive reducer from Harmonic Drive Systems, a globally renowned manufacturer of harmonic reducers. This is also the primary assembly method for industrial robot joints. The harmonic reducer includes the main reducer body 25 and the existing wave generator 24. The reducer can only function properly when the wave generator and the reducer body are coaxially connected. The existing wave generator 24 is directly connected to the existing motor 21, which can be approximated as the wave generator and the motor's output shaft being coaxial. The reducer body is indirectly connected to the motor via a motor mounting flange 22 and a connecting part 23. For ease of assembly, this indirect connection typically uses a clearance fit, resulting in installation gaps between the parts. Additionally, each part has its own machining and assembly errors. For example, the motor mounting flange 22 connects both the existing motor 21 and the connecting part 23, and there is a coaxial machining error between its first cylindrical surface 26 and second cylindrical surface 27, causing a misalignment between the axis of the motor mounting flange 22 and the axis of the connecting part 23. In summary, due to the large number of intermediate parts, the machining errors of each part, and the assembly gaps between parts, the wave generator and the reducer body cannot be coaxially installed or their axis is offset beyond the installation requirements. This causes the robot joints to vibrate and make abnormal noises, reducing the service life of the reducer. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide an improved reducer motor connection assembly that is easy to install, has small error, and low cost.

[0007] This utility model relates to an improved reducer motor connection assembly, which includes a motor, a reducer, and a wave generator. A connecting flange is provided on the side of the reducer body where the wave generator is installed. A positioning cylindrical surface is provided on the inner side of the connecting flange. The motor is fixedly connected to the connecting flange. At the same time, the outer side of the boss on the motor is fitted with the cylindrical surface on the inner side of the connecting flange. The wave generator is installed on the reducer and connected to the motor. The wave generator and the motor are located on the same side of the reducer body.

[0008] This utility model relates to an improved speed reducer motor connection assembly, wherein the connecting flange and the speed reducer body are connected by a dial indicator.

[0009] This utility model relates to an improved speed reducer motor connection assembly, wherein the motor and the connecting flange are connected by screws.

[0010] The present invention relates to an improved reducer motor connection assembly, wherein the output shaft of the motor extends into the cavity of the reducer body.

[0011] The present invention relates to an improved reducer motor connection assembly, wherein the wave generator is installed in the cavity of the reducer body and is connected to the output shaft of the motor via a key.

[0012] The present invention relates to an improved reducer motor connection assembly, wherein a mounting plate is provided on the end face of the motor, the mounting plate being used to fasten the wave generator and the motor together.

[0013] The present invention relates to an improved reducer motor connection assembly, wherein the mounting plate is fixed to the end face of the motor by locking screws.

[0014] The improved reducer motor connection assembly of this utility model differs from the prior art in that it provides a connection method between an industrial robot reducer and a motor, reducing the use of intermediate parts, thereby ensuring minimal processing and assembly errors in structure, improving the coaxiality of the reducer body and the motor or wave generator; and by reducing the use of parts, it reduces the assembly time of enterprises and improves enterprise efficiency.

[0015] In this invention, the wave generator is first connected to the motor, and then installed into the reducer body along with the motor, which reduces the difficulty of assembly.

[0016] This invention can reduce the length of the motor output shaft by changing the height of the connecting flange, which can reduce the bending deformation of the motor output shaft and further optimize the operating conditions of the reducer.

[0017] The improved speed reducer motor connection assembly of this utility model will be further described below with reference to the accompanying drawings. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the improved reducer motor connection assembly of this utility model; Figure 2 This is a cross-sectional view of the improved speed reducer motor connection assembly of this utility model; Figure 3 This is a schematic diagram of a speed reducer assembly in the prior art; The markings in the diagram are as follows: 1-Motor; 101-Motor body; 102-Output shaft; 2-Reducer; 201-Connecting flange; 202-Reducer body; 3-Wave generator; 4-Mounting pressure plate; 5-Locking screw; 6-Cylindrical surface; 21-Existing motor; 22-Motor mounting flange; 23-Connecting parts; 24-Existing wave generator; 25-Existing reducer body; 26-First cylindrical surface; 27-Second cylindrical surface. Detailed Implementation

[0019] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention. Example

[0020] like Figure 1 and Figure 2 As shown, the improved reducer motor connection assembly of this utility model includes a motor 1, a reducer 2, a wave generator 3, a mounting plate 4, and a locking screw 5.

[0021] The reducer body 202 is connected to a connecting flange 201 via screws on the side where the wave generator 3 is mounted. The inner side of the connecting flange 201 has a positioning cylindrical surface 6, which is used to mate with the motor 1. The connection flange 201 and the reducer body 202 are mounted using a dial indicator. This dial indicator mounting method ensures the coaxiality between the positioning cylindrical surface 6 and the reducer body 202 even when the components are manufactured with low precision.

[0022] Motor 1 and wave generator 3 are located on the same side of reducer 2. Motor 1 is connected to connecting flange 201 by screws, and the outer side of the boss on motor 1 mates with the cylindrical surface 6 on the inner side of connecting flange 201. Motor 1 is mounted on the positioning cylindrical surface 6, ensuring coaxiality between motor 1 and reducer body 202. The output shaft 102 of motor 1 extends into the cavity of reducer body 202. When the height of connecting flange 201 changes, the length of output shaft 102 of motor 1 can be adjusted accordingly, thus keeping the bending deformation of output shaft 102 within a suitable range to optimize the operating conditions of the reducer.

[0023] Wave generator 3 is installed in the cavity of reducer body 202 through connecting flange 201 and is connected to the output shaft 102 of motor 1 by a key. The installation of wave generator 3 and motor 1 occurs before wave generator 3 is installed inside reducer body 202, thus reducing assembly difficulty. A mounting plate 4 is provided on the end face of motor 1, and the mounting plate 4 is fixedly connected to the motor end face by locking screws 5. The inner surface of mounting plate 4 contacts the outer surface of wave generator 3, and mounting plate 4 is used to fasten wave generator 3 and motor 1 together. Since wave generator 3 and motor 1 are located on the same side of reducer 2, the output shaft 102 of motor 1 can be adjusted according to the height of connecting flange 201; if wave generator 3 and motor 1 are located on opposite sides of reducer 2, the length of output shaft 102 of motor 1 cannot be shortened due to the installation position limitation of wave generator 3.

[0024] When installing the improved reducer motor connection assembly of this utility model, first install the wave generator 3 on the motor output shaft 102, put in the mounting plate 4, and fasten the wave generator 3 and the motor 1 together with the locking screw 5; then add an appropriate amount of lubricating grease to the cavity of the reducer 2; then install the motor 1 connected to the wave generator 3 on the reducer 2 with screws.

[0025] In actual production, the connection between the flange and the reducer body can be pre-assembled by the reducer supplier. The robot manufacturer only needs to install the motor onto the reducer body with screws, and then install the wave generator onto the motor using pressure plates and locking screws. This significantly improves the robot manufacturer's assembly efficiency. This connection method allows the motor and reducer to be pre-assembled as components outside the robot body, facilitating subsequent dynamic installation and further improving the coaxiality of the reducer and motor assembly.

[0026] This utility model's improved reducer motor connection assembly redesigns the connection structure between the reducer and the motor. The motor is directly mounted on the reducer's connecting flange, which is connected to the main structure of the reducer. Compared to existing technologies... Figure 3 According to the technical solution in the present invention, the connection between the motor and the rest of the reducer body is reduced by one intermediate part, which can reduce the assembly coaxiality error between the motor output shaft or wave generator and the reducer.

[0027] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. An improved reducer motor connection assembly, characterized in that: The device includes a motor, a reducer, and a wave generator. The reducer body has a connecting flange on the side where the wave generator is installed. The inner side of the connecting flange has a positioning cylindrical surface. The motor is fixedly connected to the connecting flange. At the same time, the outer side of the boss on the motor is fitted with the cylindrical surface on the inner side of the connecting flange. The wave generator is installed on the reducer and connected to the motor. The wave generator and the motor are located on the same side of the reducer body.

2. The improved reducer motor connection assembly according to claim 1, characterized in that: The connecting flange is installed to the reducer body using a dial indicator.

3. The improved reducer motor connection assembly according to claim 1, characterized in that: The motor is connected to the connecting flange by screws.

4. The improved reducer motor connection assembly according to claim 1, characterized in that: The output shaft of the motor extends into the cavity of the reducer body.

5. The improved reducer motor connection assembly according to claim 4, characterized in that: The wave generator is installed in the cavity of the reducer body and is connected to the output shaft of the motor via a key.

6. The improved reducer motor connection assembly according to claim 1, characterized in that: The motor end face is provided with a mounting plate, which is used to fasten the wave generator and the motor together.

7. The improved reducer motor connection assembly according to claim 6, characterized in that: The mounting plate is fixed to the end face of the motor by locking screws.

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