Walking speed reducer driven by permanent magnet synchronous motor

Abstract

A walking speed reducer driven by a permanent magnet synchronous motor relates to the technical field of walking speed reducers, and can be matched with a high-speed permanent magnet synchronous motor for use by adding a primary cylindrical helical tooth planetary gear train on a traditional walking speed reducer, thereby assisting the electric driving process of engineering machinery. The walking speed reducer driven by the permanent magnet synchronous motor comprises a cylindrical helical tooth planetary gear train, and a high-speed gear ring in the cylindrical helical tooth planetary gear train is connected with a motor connecting base through a spline and limits rotation of the motor connecting base. A planet wheel bearing is arranged in the high-speed-stage planet wheel, the high-speed-stage planet wheel and the high-speed-stage planet wheel are integrally arranged in a double-arm planet carrier and are positioned through a planet shaft, and meanwhile, the planet shaft is positioned through a second clamping spring; the assembled double-arm planet carrier is integrally arranged in the motor connecting seat and is limited through the first positioning bearing and the second positioning bearing, and the first positioning bearing is in contact with the high-speed gear ring; the high-speed sun gear is arranged in the connecting sleeve, rotation of the high-speed sun gear is limited through spline connection, and meanwhile axial movement of the high-speed sun gear is limited through a third clamping spring.

Description

Technical Field

[0001] The utility model relates to the technical field of travel reducers, in particular to a travel reducer driven by a permanent magnet synchronous motor. Background Art

[0002] At present, under the background of the "dual carbon" national strategy, the development of low-carbon, green and energy-saving new energy engineering machinery has become a new trend. Driven by policies, the progress of engineering machinery towards new energy is accelerating.

[0003] Most construction machinery travel drives are wheel-driven, using a motor and reducer combination. To achieve electric drive, the drive system needs to be changed to a motor and reducer combination. However, motors have higher speeds than motors, which results in traditional travel reducer structures experiencing excessive noise and vibration during high-speed operation, making them unusable.

[0004] Therefore, in order to realize the transformation of engineering machinery to electric drive, it is urgent to develop high-speed travel reducers. Utility Model Content

[0005] The purpose of this utility model is to provide a travel reducer driven by a permanent magnet synchronous motor. By adding a first-stage cylindrical helical planetary gear train to the traditional travel reducer, it can be used in conjunction with a high-speed permanent magnet synchronous motor, thereby facilitating the electric drive process of engineering machinery.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A travel reducer driven by a permanent magnet synchronous motor, comprising: a cylindrical helical gear planetary gear train, wherein the cylindrical helical gear planetary gear train is mainly composed of a high-speed ring gear, a high-speed planetary gear, a high-speed sun gear, a double-arm planetary carrier, a planetary gear bearing, a first locating bearing, a second locating bearing, a connecting sleeve, a planetary shaft, a second retaining spring, and a third retaining spring;

[0008] The high-speed ring gear is connected to the motor connecting seat through a spline, and limits the rotation of the high-speed ring gear; the planetary gear bearings are installed in the high-speed planetary gear, and the two are installed as a whole in the double-arm planetary carrier, and are positioned by the planetary shaft, and the planetary shaft is positioned by the second retaining spring; the assembled double-arm planetary carrier is installed as a whole in the motor connecting seat, and is limited by the first locating bearing and the second locating bearing, and the first locating bearing is in contact with the high-speed ring gear; the high-speed sun gear is installed in the sleeve, and the rotation of the high-speed sun gear is limited by a spline connection, and the axial movement of the high-speed sun gear is limited by the third retaining spring.

[0009] In actual application, the cylindrical helical planetary gear train further includes: a bearing seat, in which a skeleton oil seal and a third locating bearing are installed; and the assembled connecting sleeve is integrally installed in the bearing seat.

[0010] The bearing seat is installed in the motor connecting seat, and the bearing seat is in contact with the first positioning bearing, and the axial movement of the bearing seat is limited by the first retaining spring.

[0011] Specifically, the connecting sleeve is connected to the output shaft of the motor via a spline.

[0012] Compared with the prior art, the travel reducer driven by the permanent magnet synchronous motor described in the present invention has the following advantages:

[0013] In the travel reducer driven by the permanent magnet synchronous motor provided by the present invention, since the permanent magnet synchronous motor has a high speed, a first-level cylindrical helical planetary gear train is added at the input end of the reducer. The gear design of this planetary gear train adopts helical fine and high teeth. This tooth shape design can improve the load-bearing capacity, reduce noise and vibration, run smoothly, and adapt to high-speed operation. Therefore, after the input speed is decelerated by the cylindrical helical planetary gear train, the speed can be reduced by three to four times. The input speed of the next-level planetary gear train is consistent with the input speed of the traditional travel reducer. It can use a cylindrical spur planetary gear transmission and can be designed using the traditional travel reducer design method. Therefore, the travel reducer driven by the permanent magnet synchronous motor provided by the present invention can be used in conjunction with a high-speed permanent magnet synchronous motor, thereby helping the electrification process of engineering machinery. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of a travel reducer driven by a permanent magnet synchronous motor provided in an embodiment of the utility model.

[0015] Reference numerals:

[0016] 1-high-speed ring gear; 2-first locating bearing; 3-double-arm planetary carrier; 4-high-speed sun gear; 5-connecting sleeve; 6-second locating bearing; 7-output shaft; 8-skeleton oil seal; 9-third locating bearing; 10-planetary gear bearing; 11-high-speed planetary gear; 12-bearing seat; 13-first retaining spring; 14-motor connecting seat; 15-planetary shaft; 16-second retaining spring; 17-third retaining spring; 18-next-stage sun gear. DETAILED DESCRIPTION

[0017] For ease of understanding, the permanent magnet synchronous motor driven travel reducer provided in the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings.

[0018] The present invention provides a travel reducer driven by a permanent magnet synchronous motor. Figure 1As shown, it includes: a cylindrical helical gear planetary gear train, and the cylindrical helical gear planetary gear train is mainly composed of a high-speed ring gear 1, a high-speed planetary gear 11, a high-speed sun gear 4, a double-arm planetary carrier 3, a planetary gear bearing 10, a first locating bearing 2, a second locating bearing 6, a sleeve 5, a planetary shaft 15, a second retaining spring 16 and a third retaining spring 17;

[0019] The high-speed ring gear 1 is connected to the motor connecting seat 14 through a spline connection, and the rotation of the high-speed ring gear 1 is restricted; the high-speed planetary gear 11 is equipped with a planetary gear bearing 10, and the two (high-speed planetary gear 11 and planetary gear bearing 10) are integrally installed in the double-arm planetary carrier 3 and positioned by the planetary shaft 15, and the planetary shaft 15 is positioned by the second retaining spring 16; the assembled double-arm planetary carrier 3 is integrally installed in the motor connecting seat 14, and is limited by the first locating bearing 2 and the second locating bearing 6, and the first locating bearing 2 is in contact with the high-speed ring gear 1; the high-speed sun gear 4 is installed in the socket 5, and the rotation of the high-speed sun gear 4 is restricted by the spline connection, and the axial movement of the high-speed sun gear 4 is restricted by the third retaining spring 17.

[0020] Compared with the prior art, the travel reducer driven by the permanent magnet synchronous motor described in the embodiment of the utility model has the following advantages:

[0021] In the travel reducer driven by the permanent magnet synchronous motor provided in the embodiment of the present invention, due to the high speed of the permanent magnet synchronous motor, a first-level cylindrical helical planetary gear system is added at the input end of the reducer. The gear design of this planetary gear system adopts helical fine and high teeth. This tooth shape design can improve the load-bearing capacity, reduce noise and vibration, run smoothly, and adapt to high-speed operation. Therefore, after the input speed is decelerated by the cylindrical helical planetary gear system, the speed can be reduced by three to four times. The input speed of the next-level planetary gear system is consistent with the input speed of the traditional travel reducer. It can use a cylindrical spur planetary gear transmission and can be designed using the traditional travel reducer design method; therefore, the travel reducer driven by the permanent magnet synchronous motor provided in the embodiment of the present invention can be used in conjunction with a high-speed permanent magnet synchronous motor, thereby helping the electrification process of engineering machinery.

[0022] In actual application, such as Figure 1 As shown, the cylindrical helical planetary gear train may further include: a bearing seat 12 , in which a skeleton oil seal 8 and a third locating bearing 9 are installed; and the assembled connecting sleeve 5 is integrally installed in the bearing seat 12 .

[0023] Among them, Figure 1 As shown, the above-mentioned bearing seat 12 is installed in the motor connecting seat 14, and the bearing seat 12 is in contact with the first locating bearing 2. At the same time, the axial movement of the bearing seat 12 is limited by the first retaining spring 13, thereby effectively limiting the axial movement of the first locating bearing 2 and the high-speed gear ring 1.

[0024] Specifically, if Figure 1 As shown, the above-mentioned sleeve 5 can be connected to the output shaft 7 of the motor through a spline, so that the motor can be well installed in the high-speed travel reducer.

[0025] The transmission path of the travel reducer driven by the permanent magnet synchronous motor provided in the embodiment of the utility model is described in detail with the help of the accompanying drawings:

[0026] like Figure 1 As shown, the transmission type of the cylindrical helical planetary gear train is a fixed ring gear, a sun gear input, and a planet carrier output; the power is input to the travel reducer by the output shaft 7 of the permanent magnet synchronous motor, and the sleeve 5 drives the high-speed sun gear 4 to rotate. The power is split through the planetary gear train and output to the next-level sun gear 18 by the double-arm planet carrier 3.

[0027] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A travel reducer driven by a permanent magnet synchronous motor, characterized in that: include: A cylindrical helical gear planetary gear train mainly composed of a high-speed ring gear, a high-speed planetary gear, a high-speed sun gear, a double-arm planetary carrier, a planetary gear bearing, a first locating bearing, a second locating bearing, a connecting sleeve, a planetary shaft, a second retaining spring, and a third retaining spring; The high-speed ring gear is connected to the motor connecting seat through a spline, and limits the rotation of the high-speed ring gear; the planetary gear bearings are installed in the high-speed planetary gear, and the two are installed as a whole in the double-arm planetary carrier, and are positioned by the planetary shaft, and the planetary shaft is positioned by the second retaining spring; the assembled double-arm planetary carrier is installed as a whole in the motor connecting seat, and is limited by the first locating bearing and the second locating bearing, and the first locating bearing is in contact with the high-speed ring gear; the high-speed sun gear is installed in the sleeve, and the rotation of the high-speed sun gear is limited by a spline connection, and the axial movement of the high-speed sun gear is limited by the third retaining spring.

2. The travel reducer driven by a permanent magnet synchronous motor according to claim 1, characterized in that: The cylindrical helical planetary gear train further includes a bearing seat, in which a skeleton oil seal and a third positioning bearing are installed; and the assembled connecting sleeve is entirely installed in the bearing seat.

3. The travel reducer driven by a permanent magnet synchronous motor according to claim 2, characterized in that: The bearing seat is installed in the motor connecting seat, and the bearing seat is in contact with the first positioning bearing, and the axial movement of the bearing seat is limited by the first retaining spring.

4. The travel reducer driven by a permanent magnet synchronous motor according to any one of claims 1 to 3, characterized in that: The connecting sleeve is connected to the output shaft of the motor through a spline.

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