Motor drive unit

Abstract

The present invention provides a motor group driving device, which comprises a frame, an output shaft, at least two motors, a first driven gear and a second driven gear. The at least two motors are respectively arranged on different side walls of the frame, the driving axes of the at least two motors are arranged in parallel, the driving axes of the at least two motors are located on the same plane, the driving ends of the at least two motors are respectively connected with driving gears, the driving gears are respectively meshed and connected with the first driven gear and the second driven gear, and the output shaft is fixedly connected with the second driven gear. With the above structure, the output power of the motor group driving device can be adjusted by rotating and superimposing the driving ends of the motors at different positions. According to the size of the output power required by the motor group driving device, the number of motors with output power is increased or decreased, thereby adjusting the power obtained by the output shaft, thereby realizing the controllable output power and energy saving.

Description

Technical Field

[0001] The present invention relates to the field of power drive devices, and in particular to a motor group drive device. Background Art

[0002] Currently, large mobile machinery products on the market are using high-power electric motors to provide the power of movement. However, such high-power motors are relatively large in size and have relatively high energy losses. Such high-power motors lose a lot of energy under low load conditions, resulting in economic price differences and unable to meet the energy-saving requirements of today's market. Summary of the invention

[0003] The main purpose of the present invention is to provide a motor group driving device with adjustable and controllable output power.

[0004] In order to achieve the above-mentioned main purpose, the motor group driving device provided by the present invention includes a frame, an output shaft, at least two motors, a first driven gear and a second driven gear, the at least two motors are respectively arranged on different side walls of the frame, the driving axes of at least two motors are arranged in parallel, the driving axes of at least two motors are located on the same plane, the driving ends of at least two motors are respectively connected to driving gears, the driving gears are respectively meshed and connected with the first driven gear and the second driven gear, and the output shaft is fixedly connected to the second driven gear.

[0005] It can be seen from the above scheme that the output power of the motor group drive device can be adjusted by superimposing the rotation of the driving ends of the motors at different positions. When the motor group drive device needs to output high power, since multiple motors are connected to the output shaft through a gear meshing structure, the power of multiple motors is output simultaneously, so that the output shaft obtains a larger instantaneous power. When the power required to be output by the motor group drive device becomes smaller, the number of motors with output power is reduced, thereby reducing the power obtained by the output shaft, thereby achieving the controllable output power and energy saving. When multiple motors drive the driving gear to rotate and drive the first driven gear and the second driven gear to rotate, the setting of the first driven gear can improve the stability between the multiple driving gears, so that the multiple driving gears can drive the second driven gear to rotate more stably and accurately at the same time.

[0006] A further solution is that the central axis of the output shaft is arranged perpendicularly to the driving axes of at least two motors.

[0007] A further solution is that the number of motors is four, and the four motors are respectively arranged on different side walls of the frame. The four motors surround a transmission cavity, and the central axis of the output shaft passes through the center point of the transmission cavity.

[0008] It can be seen that the output shaft located in the axial extension direction at the center of the transmission cavity can obtain the power output by each motor more timely and concentratedly.

[0009] A further solution is that the first driven gear, the second driven gear and the driving gear are bevel gears respectively.

[0010] It can be seen that when the output shaft and the driving axis of each motor are arranged vertically, the driving gear is directly meshed and connected with the first driven gear and the second driven gear respectively, without the need for other intermediate transmission parts, so that the number of transmission parts of the motor group drive device is reduced and the structure is simpler.

[0011] A further solution is that the driving device includes a speed measuring component, the speed measuring component includes a rotating plate and a speed sensor, the output shaft is connected to the rotating plate, the speed sensor is provided with a groove, the rotating plate rotates in the groove, a plurality of through grooves are provided on the rotating plate, and the plurality of through grooves are evenly arranged radially from the output shaft along the radial direction of the output shaft.

[0012] It can be seen that the speed of the output shaft can be known through the speed measuring component, and different speeds can be adjusted according to different usage scenarios, thereby correspondingly increasing or decreasing the number of motors with output power.

[0013] A further solution is that the frame includes a motor mounting side plate, an upper cover and a lower cover, the motor mounting side plate is annular, at least two motors are arranged on different side walls of the motor mounting side plate, the driving gear is located inside the motor mounting side plate, the upper cover and the lower cover are respectively connected to the motor mounting side plate, the upper cover and the lower cover are arranged opposite to each other, the output shaft is arranged on the side wall of the upper cover away from the motor mounting side wall, the second driven gear is arranged on the side wall of the lower cover facing the motor mounting side plate, and the first driven gear rotates relative to the lower cover.

[0014] It can be seen that the upper cover is the mounting carrier of the output shaft and the second driven gear, and the lower cover is the mounting carrier of the second driven gear. The first driven gear, the second driven gear and each driving gear are concentrated in the motor mounting side plate, making their connection more compact while avoiding exposure of transmission components. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a stereoscopic diagram of an embodiment of a motor group driving device of the present invention.

[0016] Figure 2 It is a structural diagram of the motor group driving device embodiment of the present invention after removing the lower cover.

[0017] Figure 3 It is a cross-sectional view of an embodiment of a motor group driving device of the present invention.

[0018] The present invention is further described below in conjunction with the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0019] The motor group drive device of the present invention achieves energy saving by adjusting the output power of the motor group drive device by superimposing the rotation of the driving ends of multiple motors, so that the output shafts connected to the motors can obtain greater instantaneous power. The motor group drive device can be used as a driving source for various mobile bodies, which may include drones, new energy vehicles or ships, etc.

[0020] See also Figure 1 The motor group driving device includes a frame 1, an output shaft 2 and four motors 3. The frame 1 includes a motor mounting side plate 11, an upper cover 12 and a lower cover 13. The four motors 3 are arranged on different side walls of the motor mounting side plate 11. The upper cover 12 and the lower cover 13 are respectively connected to the motor mounting side plate 11. The upper cover 12 and the lower cover 13 are arranged opposite to each other. The output shaft 2 is arranged on the side wall of the upper cover 12 away from the motor mounting side plate 11.

[0021] In this embodiment, the motor mounting side plate 11 is rectangular, the corners between every two adjacent outer side walls in the motor mounting side plate 11 are rounded, and the motor mounting side plate 11 is formed with four outer side walls 111. There are four motors 3, one motor 3 is correspondingly mounted on one outer side wall 111, and the driving end of each motor 3 passes through the motor mounting side plate 11. The driving axes of the four motors 3 are arranged in parallel, and the driving axes of the four motors 3 are located on the same plane, so that the positions of the four motors 3 are relatively flush with each other, making it easier to achieve that the four motors are connected to the transmission middleware and the output shaft 2 at the same time.

[0022] See also Figure 2 and Figure 3 The motor drive device further includes a first driven gear 4 and a second driven gear 5. The first driven gear 4 is arranged on the side wall of the lower cover 13 facing the motor installation side plate 11. In this embodiment, a positioning rod 41 is arranged on the side wall of the first driven gear 4 facing the lower cover 13. The positioning rod 41 penetrates the lower cover 13, and the first driven gear 4 rotates relative to the lower cover 13. The second driven gear 5 is arranged on the side wall of the upper cover 12 facing the motor installation side plate 11, and the output shaft 2 penetrates the upper cover 12 and is fixedly connected to the second driven gear 5.

[0023] The driving ends of the four motors 3 are respectively connected with driving gears 31, and the driving gears 31 and the second driven gears 5 serve as transmission intermediate parts for the four motors to drive the output shaft 2 to rotate; the four driving gears 31, the first driven gear 4 and the second driven gear 5 are respectively located in the motor installation side plate 11, and the upper cover 12 and the lower cover 13 respectively cover the inside of the motor installation side plate 11 to prevent the internal parts of the motor installation side plate 11 from being exposed. The driving gears 31 of the four motors 3 are respectively meshed with the second driven gears 5, and the output shaft 2 is fixedly connected to the second driven gear 5 through the upper cover 12, and the driving gears 31 of the four motors 3 are respectively meshed with the first driven gear 4. When the four motors 3 rotate simultaneously, the first driven gear 4 and the second driven gear 5 are driven to rotate simultaneously, and the rotation of the second driven gear 5 drives the rotation of the output shaft 2, so that the driving ends of the four motors 3 rotate and superimpose power on the output shaft 2. Since the driving gears 31 on the four motors 3 are respectively meshed with the first driven gear 4, the provision of the first driven gear 4 can improve the connection stability between the multiple driving gears 31, so that the multiple driving gears 31 can drive the second driven gear 5 to rotate more stably and accurately at the same time. In this embodiment, the first driven gear 4, the second driven gear 5 and the driving gear 31 are respectively bevel gears, so that the first driven gear 4 and the second driven gear 5 can respectively and smoothly mesh with the four driving gears 31 directly at the same time, without adding an intermediate transmission gear between the driving gear 31 and the first driven gear 4 or the second driven gear 5, so that the transmission structure has fewer components, the transmission efficiency is high, and the structure can be simplified to the minimum.

[0024] The four driving gears 31 in the motor mounting side plate 11 and the first driven gear 4 and the second driven gear 5 form a transmission cavity 112. In this embodiment, the central axis of the output shaft 2 is vertically arranged with the driving axes of the four motors 3 respectively; the central axis of the output shaft 2 passes through the transmission cavity 112, and the central axis of the output shaft 2 passes through the center point of the transmission cavity 112, and the center point is at the same distance from each driving gear 31; so that the output power of the four motors 3 is more timely and more concentratedly superimposed on the output shaft 2. The four motors 3 are respectively connected to the first driven gear 4 through the driving gears 31, so that the motor 3 can drive the first driven gear 4 to rotate, so that the positioning rod 41 on the first driven gear 4 can also be used as an output shaft, and the axis of the positioning rod on the lower cover 13 is colinearly arranged with the axis of the output shaft 2 on the upper cover 12, so that two output shafts 2 are formed in one motor group drive device.

[0025] In this embodiment, the motor 3 is an outer rotor motor 3, and the motor 3 includes a rotor 32 and a stator 33. The rotor 32 rotates relative to the stator 33. The stator 33 includes a magnetic steel frame 331 and a plurality of windings, and the plurality of windings are arranged on the magnetic steel frame 331. The rotor 32 includes an annular mounting plate 321, a plurality of permanent magnets 322, a motor upper cover 323, a motor bottom cover 324 and a rotating shaft 325. The stator 33 is arranged in the annular mounting plate 321, and the stator 33 is arranged on the motor bottom cover 324. The motor bottom cover 324 rotates relative to the stator 33. The plurality of permanent magnets 322 are respectively arranged on the inner side wall of the annular mounting plate 321, and the motor upper cover 323 and the motor bottom cover 324 are respectively connected to the annular mounting plate 321, and the motor upper cover 323 and the motor bottom cover 324 are arranged relative to each other. The motor upper cover 323 and the motor bottom cover 324 respectively cover the stator 33 in the annular mounting plate 321, and a plurality of heat dissipation holes 3231 are provided on the motor upper cover 323. The rotating shaft 325 is fixedly connected to the side wall of the motor upper cover 323 facing the stator 33, and the rotating shaft 325 passes through the magnetic steel frame 331, the motor bottom cover 324 and the motor mounting side plate 11 in the annular mounting plate 321 in sequence. The driving end of the motor 1 is located on the rotating shaft 325, and the rotating shaft 325 passes through the motor mounting side plate 11 and is connected to the driving gear 31.

[0026] By superimposing the rotation of the driving ends of the motors 3 at different positions, the output power of the motor group drive device is adjusted. When the motor group drive device needs to output high power, since multiple motors 3 are connected to the output shaft 2 through a gear meshing structure, the power of multiple motors 3 is output simultaneously, so that the output shaft 2 obtains a larger instantaneous power. When the power required to be output by the motor group drive device becomes smaller, the number of motors 3 with output power is reduced, thereby reducing the power obtained by the output shaft 2, thereby achieving controllable output power and energy saving. When multiple motors 3 drive the driving gear 31 to rotate and drive the first driven gear 4 and the second driven gear 5 to rotate, the setting of the first driven gear 4 can improve the stability between the multiple driving gears 31, so that the multiple driving gears 31 can drive the second driven gear 5 to rotate more stably and accurately at the same time.

[0027] The motor group driving device includes a speed measuring component 6, which is located on the side wall of the upper cover 12 away from the motor mounting side plate 11. The speed measuring component 6 includes a rotating plate 61 and a speed sensor 62. The output shaft 2 is connected to the rotating plate 61. The speed sensor 62 has a groove 621. The rotating plate 61 rotates in the groove 621. The rotating plate 61 is provided with a plurality of through grooves 611, and the plurality of through grooves 611 are evenly arranged radially from the output shaft 2 along the radial direction of the output shaft 2. The power obtained by the output shaft 2 can be known through the speed measuring component 6, and different speeds can be adjusted according to different usage scenarios, thereby correspondingly increasing or decreasing the number of motors 3 with output power.

[0028] Finally, it should be emphasized that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A motor drive device, characterized in that: include: A frame, an output shaft, at least two motors, a first driven gear and a second driven gear, wherein the at least two motors are respectively arranged on different side walls of the frame, the driving axes of at least two of the motors are arranged in parallel, the driving axes of at least two of the motors are located on the same plane, the driving ends of at least two of the motors are respectively connected to driving gears, the driving gears are respectively meshed and connected with the first driven gear and the second driven gear, and the output shaft is fixedly connected with the second driven gear; The central axis of the output shaft is arranged perpendicularly to the driving axes of at least two of the motors respectively; The number of the motors is four, and the four motors are respectively arranged on different side walls of the frame. The four motors form a transmission cavity, and the central axis of the output shaft passes through the transmission cavity.

2. The motor drive device according to claim 1, characterized in that: The first driven gear, the second driven gear and the driving gear are bevel gears respectively.

3. The motor drive device according to claim 1 or 2, characterized in that: The driving device includes a speed measuring component, which includes a rotating plate and a speed sensor. The output shaft is connected to the rotating plate. The speed sensor is provided with a groove. The rotating plate rotates in the groove. The rotating plate is provided with a plurality of through grooves, and the plurality of through grooves are evenly arranged radially from the output shaft along the radial direction of the output shaft.

4. The motor drive device according to claim 3, characterized in that: The frame includes a motor mounting side plate, an upper cover and a lower cover, the motor mounting side plate is annular, at least two of the motors are arranged on different side walls of the motor mounting side plate, the driving gear is located in the motor mounting side plate, the upper cover and the lower cover are respectively connected to the motor mounting side plate, the upper cover and the lower cover are arranged opposite to each other, the output shaft is arranged on the side wall of the upper cover away from the motor mounting side wall, the second driven gear is arranged on the side wall of the lower cover facing the motor mounting side plate, and the first driven gear rotates relative to the lower cover.

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