Coaxial gear motor

Abstract

The utility model discloses a coaxial speed reduction motor, which is characterized in that a speed reduction gear set is meshed with a motor output shaft and a speed reducer output shaft, so that the output rotating speed of the motor output shaft is gradually reduced along the direction from the motor output shaft to the speed reducer output shaft, and finally, the speed reducer output shaft outputs lower rotating speed, thereby achieving the speed reduction effect. In the process, the central axis of the output shaft of the motor coincides with the central axis of the output shaft of the speed reducer, and the rotation speed is transmitted only through the speed reduction gear set in the middle, so that the whole structure is simple, the energy loss is small, the transmission precision is high, and the obtained speed reduction effect is more obvious and controllable; therefore, the diameter of the whole device is smaller than that of a previous speed reducer, the speed reducer can be suitable for a more precise device, and the applicability of the speed reducer is also remarkably improved.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of reduction motors, in particular to a coaxial reduction motor. Background Art

[0002] A reduction motor is an integrated unit of a reducer and a motor. It is widely used in the steel industry, machinery industry, etc. Its function is to convert the high-speed, low-torque output power of the motor into a low-speed, high-torque output of the reduction mechanism to drive other control mechanisms to move. The commonly used reduction motor is an eccentric reducer. The core structure of the eccentric reducer is an eccentric wheel, whose axis does not coincide with the axis of rotation and there is an eccentric distance between them. The eccentric wheel is connected to the planetary wheel through a transmission sleeve rod under the output shaft. When the planetary wheel is driven by the gear of the eccentric wheel, the planetary wheel begins to rotate around the eccentric wheel. The rotation of the planetary wheel causes the output shaft to rotate, thereby realizing the speed change of the output shaft. However, the eccentric reducer has a complex structure, is prone to fatigue damage after long-term use, has a short life, and the motor output shaft and the reducer output shaft are not coaxial, which makes the precision lacking. Therefore, a coaxial reduction motor with a simpler structure and better effect is needed. Summary of the invention

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a coaxial reduction motor.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A coaxial reduction motor comprises a motor and a reducer connected thereto, wherein the reducer comprises a reduction gear set formed by a plurality of double gears meshing in sequence and a reducer output shaft, wherein the input end of the reduction gear set meshes with the motor output shaft, the output end of the reduction gear set meshes with the reducer output shaft, and the central axis of the reducer output shaft coincides with the central axis of the motor output shaft.

[0006] As a further improvement of the above technical solution:

[0007] The reduction gear set comprises at least two installation shafts, which are distributed circumferentially around the motor output shaft; and mutually meshing double gear sleeves are arranged on adjacent installation shafts.

[0008] Along the direction from the motor output shaft to the reducer output shaft, the rotation speed of the mutually meshing double gears decreases successively.

[0009] Adjacent duplex gears on the same mounting shaft are provided with a gap.

[0010] The reducer also includes a housing, and the reduction gear set is built in the housing.

[0011] The shell comprises a cylindrical side plate and end plates which are covered at both ends of the cylindrical side plate, and the mounting shaft is connected to the end plates.

[0012] The reducer also includes a bracket connected to the end plate and used for supporting the output shaft of the reducer. A convex block is formed on the bracket, and the convex block abuts against the center of the output shaft of the reducer.

[0013] Compared with the prior art, the advantages of the utility model are:

[0014] This device reduces the speed of the motor output shaft through the reduction gear set and transmits it to the reducer output shaft. The overall structure is simple, the energy loss is small, and the transmission accuracy is high. Therefore, the deceleration effect achieved is more obvious and controllable. In addition, since the motor and the reducer are coaxially output, the diameter of the overall device is smaller than that of previous reducers, so it can be used in more sophisticated devices, and its applicability has also been significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of a coaxial reduction motor;

[0016] Figure 2 It is a schematic diagram of the structure of the coaxial reduction motor (the cylindrical side plate is not shown);

[0017] Figure 3 It is a partial schematic diagram of gear meshing.

[0018] The reference numerals in the figure indicate: 1, motor; 11, motor output shaft; 2, reducer; 21, reduction gear set; 211, double gear; 212, mounting shaft; 22, reducer output shaft; 23, housing; 231, cylindrical side plate; 232, end plate; 24, bracket; 241, bump. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] Example

[0021] like Figures 1 to 3As shown, the coaxial reduction motor of this embodiment includes a motor 1 and a reducer 2 connected thereto, the reducer 2 includes a reduction gear group 21 and a reducer output shaft 22 formed by a plurality of double gears 211 meshing in sequence, the input end of the reduction gear group 21 meshes with the motor output shaft 11, the output end of the reduction gear group 21 meshes with the reducer output shaft 22, and the central axis of the reducer output shaft 22 coincides with the central axis of the motor output shaft 11. The reducer 2 is connected to the motor 1, and the output speed of the motor 1 is outputted outwardly by the reducer 2 after being decelerated inside the reducer 2. The specific process is: the motor output shaft 11 is meshed with the input end of the reduction gear set 21, and the output end of the reduction gear set 21 is meshed with the reducer output shaft 22. Because the reduction gear set 21 is formed by a plurality of double gears 211 meshing in sequence, and along the direction from the motor output shaft 11 to the reducer output shaft 22, the plurality of double gears 211 are all installed in the forward direction, therefore, due to the transmission ratio between the large and small gears of the double gears 211, the high speed outputted by the motor output shaft 11 is reduced in sequence by a plurality of reduction gear sets 21 to become a lower speed, and then transmitted to the reducer output shaft 22, thereby achieving the deceleration effect. In this process, the central axes of the motor output shaft 11 and the reducer output shaft 22 coincide with each other, and the rotational speed is transmitted only through the reduction gear set 21. Therefore, the overall structure is simple, the energy loss is small, and the transmission accuracy is high. Therefore, the deceleration effect achieved is more obvious and controllable. In addition, since the motor 1 and the reducer 2 are coaxially output, the diameter of the overall device is smaller than that of the previous reducer, and it can be used in more sophisticated devices, and its applicability has also been significantly improved.

[0022] In this embodiment, the reduction gear set 21 includes two installation shafts 212, and the installation shafts 212 are distributed circumferentially around the motor output shaft 11; the mutually meshing double gears 211 are sleeved on adjacent installation shafts 212, and the large gear of the first-stage double gear 211 is meshed with the output shaft 11 of the motor 1, and the speed is reduced in sequence through a total of seven stages of double gears 211, and the small gear of the last stage of double gears 211 is meshed with the reducer output shaft 22 to output the reduced speed. By setting different numbers of double gears 211 and stacking them on at least two installation shafts 212 in sequence, not only can different levels of speed reduction effects be achieved according to actual needs, but also the structure is made more compact, reducing the occupied space of the overall device.

[0023] In this embodiment, adjacent double gears 211 on the same mounting shaft 212 are provided with gaps to prevent different levels of double gears 211 from influencing each other's rotation speeds due to contact, thereby making the rotation speeds of each level unmatched and affecting the operation of the device.

[0024] In this embodiment, the reducer 2 also includes a housing 23, and the reduction gear set 21 is built into the housing 23 to prevent dust and other external environments from affecting the interior of the reducer 2 and damaging the operation of the reduction gear set 21, thereby ensuring the precision of the overall device.

[0025] In this embodiment, the outer shell 23 includes a cylindrical side plate 231 and end plates 232 (the bottom end plate 232 is not shown) covered at both ends of the cylindrical side plate. The mounting shaft 212 is connected to the end plate 232 to prevent the mounting shaft 212 from swinging due to unstable installation when the reduction gear group 21 is running, thereby affecting the reduction matching effect.

[0026] In this embodiment, the reducer 2 also includes a bracket 24 connected to the end plate 232 and used to support the reducer output shaft 22. A protrusion 241 is formed on the bracket 24, and the protrusion 241 abuts against the center of the reducer output shaft 22. The bracket 24 is fixedly mounted on the end plate 232, and its protrusion 241 abuts against the center of the reducer output shaft 22 to prevent the reducer output shaft 22 from being offset or falling off, thereby affecting the output effect of the reducer 2.

[0027] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A coaxial reduction motor, comprising a motor (1) and a reduction gear (2) connected thereto, characterized in that: The reducer (2) comprises a reduction gear set (21) formed by a plurality of double gears (211) meshing in sequence and a reducer output shaft (22); the input end of the reduction gear set (21) meshes with the motor output shaft (11); the output end of the reduction gear set (21) meshes with the reducer output shaft (22); and the central axis of the reducer output shaft (22) coincides with the central axis of the motor output shaft (11).

2. The coaxial reduction motor according to claim 1, characterized in that: The reduction gear set (21) comprises at least two installation shafts (212), and the installation shafts (212) are distributed around the circumference of the motor output shaft (11); the mutually meshing double gears (211) are sleeved on adjacent installation shafts (212).

3. The coaxial reduction motor according to claim 1, characterized in that: Along the direction from the motor output shaft (11) to the reducer output shaft (22), the rotation speeds of the mutually meshing double gears (211) decrease in sequence.

4. The coaxial reduction motor according to claim 1, characterized in that: Adjacent duplex gears (211) on the same mounting shaft (212) are provided with a gap.

5. The coaxial reduction motor according to claim 1, characterized in that: The reducer (2) further comprises a housing (23), and the reduction gear set (21) is built in the housing (23).

6. The coaxial reduction motor according to claim 5, characterized in that: The housing (23) comprises a cylindrical side plate (231) and end plates (232) mounted on both ends of the cylindrical side plate, and the mounting shaft (212) is connected to the end plates (232).

7. The coaxial reduction motor according to claim 6, characterized in that: The reducer (2) also includes a bracket (24) connected to the end plate (232) and used to support the reducer output shaft (22); a convex block (241) is formed on the bracket (24), and the convex block (241) abuts against the center of the reducer output shaft (22).

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