Driving motor with half shaft structure

Abstract

The utility model discloses a driving motor with a half-shaft structure, which comprises a motor shell, the motor shell is axially butted with a driven device, a stator is arranged on the radial inner side of the motor shell, a rotor is arranged on the radial inner side of the stator, the radial inner side of the rotor is connected with a half-shaft core, and the half-shaft core is connected with the motor shell. The first end of the half shaft core is connected with the motor shell through a radial bearing, the second end of the half shaft core is provided with a shaft hole used for being matched with a driving shaft of a driven device, a rotor can be effectively supported through the half shaft core, and the direct connection operation problem of the high-power motor is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of drive motors, in particular to a drive motor with a half-shaft structure. Background Art

[0002] In the field of motor drive, in addition to the traditional drive motor, a shaftless direct drive motor is gradually being promoted and applied. Figure 2 The rotor is directly connected to the driving shaft of the driven equipment, without the need for intermediate connecting links such as couplings, and has high transmission efficiency, simple structure and low cost.

[0003] But this drive structure also has some problems:

[0004] 1. In the case of high power, such as above 37kW, due to the weight and volume of the motor rotor, it is very difficult to connect it to the drive shaft of the driven equipment, and the connection strength cannot guarantee stable operation.

[0005] 2. The rigidity requirements for the drive shaft of the driven equipment are high. During operation, the rotor vibration is often large, the efficiency is poor, and failures are prone to occur, especially serious failures such as rotor bore sweeping.

[0006] 3. In practical applications, a last resort measure is to enlarge the gap between the rotor and stator of the motor. The direct consequence is that the efficiency of the motor is reduced, resulting in a waste of electric energy, and the motor will also suffer from excessive temperature rise, shortening its life. Utility Model Content

[0007] The utility model provides a driving motor with a half-shaft structure, which can solve the problem that the connection strength and rigidity of the existing shaftless direct-drive motor cannot meet the requirements of stable operation and is prone to failure.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a driving motor with a half-shaft structure, comprising: a motor housing, the motor housing being axially connected to a driven device, a stator being arranged on the radial inner side of the motor housing, a rotor being arranged on the radial inner side of the stator, a half-shaft core being connected to the radial inner side of the rotor, a first end of the half-shaft core of the half-shaft core being connected to the motor housing via a radial bearing, a second end of the half-shaft core of the half-shaft core being arranged with an axial hole for cooperating with a driving shaft of the driven device, the rotor can be effectively supported by the half-shaft core, and the problem of direct-connected operation of high-power motors is solved.

[0009] Preferably, the motor housing also includes an end plate, which is arranged at the first end of the motor housing, and the radial bearing is installed at the center position of the end plate. The second end of the motor housing is connected to the driven equipment, and the end plate can be set to a detachable structure to facilitate the installation of the bearing.

[0010] Preferably, a first connecting flange is provided at the second end of the motor housing, and the first connecting flange is fixedly connected to a second connecting flange on the driven device, thereby ensuring a stable connection between the motor housing and the driving device.

[0011] Preferably, the first end of the semi-shaft core of the semi-shaft core is provided with a connecting bolt which is slidably inserted toward the second end of the semi-shaft core, and the connecting bolt is connected to the drive shaft through a thread, thereby further improving the connection firmness between the drive shaft and the semi-shaft core.

[0012] Preferably, a heat dissipation blade is sleeved and installed on the outer circle of the first end of the semi-shaft shaft core of the semi-shaft shaft core, which can generate wind flow when the semi-shaft shaft core rotates to drive the heat generated by the stator and the rotor when they are working.

[0013] Preferably, the drive motor is a DC motor, an AC asynchronous motor, or a permanent magnet synchronous motor.

[0014] Preferably, the radial bearing is a rolling bearing, a sliding bearing or a magnetic bearing.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The use of a half-shaft core and radial bearings can effectively support the rotor, so that the vibration of the drive motor is small during operation, and the gap between the stator and rotor of the motor can be further reduced, thereby improving the operating efficiency of the motor, improving the stability and safety of the motor operation, reducing the operating noise of the motor, and extending the service life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional structural diagram of the utility model;

[0018] Figure 2 It is a cross-sectional structural diagram of the prior art of the utility model.

[0019] Reference numerals:

[0020] 1. Driven equipment, 2. Motor housing, 3. Stator, 4. Rotor, 5. Connecting bolts, 6. Half-shaft core, 7. Shaft hole, 8. First end of half-shaft core, 9. Radial bearing, 10. Drive shaft, 11. Cooling fan blade, 12. End plate, 13. First connecting flange, 14. Second connecting flange, 15. Second end of half-shaft core. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0022] The utility model aims to solve the problem that the connection strength and rigidity of the existing shaftless direct drive motor cannot meet the requirements of stable operation and is prone to failure. Figure 1 As shown, the following technical solution is provided: a driving motor with a half-shaft structure, comprising: a motor housing 2, the motor housing 2 is axially connected to a driven device 1, a stator 3 is arranged on the radial inner side of the motor housing 2, a rotor 4 is arranged on the radial inner side of the stator 3, a half-shaft core 6 is connected to the radial inner side of the rotor 4, a first end 8 of the half-shaft core 6 is connected to the motor housing 2 through a radial bearing 9, a second end 15 of the half-shaft core 6 is provided with an axial hole 7 for cooperating with a driving shaft 10 of the driven device 1, the rotor 4 can be effectively supported by the half-shaft core 6, and the problem of direct connection operation of high-power motors is solved.

[0023] Specifically, the stator 3 and the rotor 4 of the driving motor in this embodiment can be matched according to different types of driving motors, such as a DC motor or an AC asynchronous motor or a permanent magnet synchronous motor, which are all suitable for the half-shaft core 6 in this embodiment. At the same time, the driven device 1 can be any device that needs to be driven by a motor, such as a gearbox, a water pump, an air pump, etc., as long as the driving shaft 10 and the half-shaft core 6 are axially connected.

[0024] The first end 8 of the semi-shaft core 6 can be set as a shaft neck to facilitate connection with the radial bearing 9. The radial bearing 9 can adopt various radial bearings in the prior art, for example, the radial bearing 9 can adopt a rolling radial bearing, a sliding radial bearing, a magnetically suspended radial bearing, etc.

[0025] In order to make the structure of the driving motor in this embodiment more reasonable, the motor housing 2 also includes an end plate 12, which is arranged at the first end of the motor housing 2, and the radial bearing 9 is installed at the center position of the end plate 12. The second end of the motor housing 2 is connected to the driven device 1. The end plate 12 can be set as a detachable structure, and a bearing installation cavity can be set on the inner wall of the end plate 12 to facilitate the installation and positioning of the radial bearing 9.

[0026] In this embodiment, if Figure 1As shown, the second side of the motor housing 2 is provided with a first connecting flange 13, and the first connecting flange 13 is fixedly connected to the second connecting flange 14 on the driven device 1, which can ensure a stable connection between the motor housing 2 and the driving device 1, and the first connecting flange 13 and the second connecting flange 14 can be connected by a plurality of connecting screws arranged around the circumference.

[0027] In order to further provide stability of the connection, the first end 8 of the semi-shaft core 6 is provided with a connecting bolt 5 which is slidably inserted toward the second end 15 of the semi-shaft core. The connecting bolt 5 is connected to the drive shaft 10 through a thread, further improving the connection strength between the drive shaft 10 and the semi-shaft core 6. A hole can be opened on the end plate 12, and after the semi-shaft core 6 is connected to the radial bearing 9, the connecting bolt 17 can be inserted from the outside of the end plate 12, which is very convenient.

[0028] In order to improve the heat dissipation efficiency of the driving motor, a heat dissipation blade 11 is sleeved and installed on the outer circle of the first end 8 of the half-shaft core 6. When the half-shaft core 6 rotates, air flow is generated to drive the heat generated by the stator 3 and the rotor 4 when they are working. The heat dissipation blade 11 can be arranged on one or both axial sides of the stator 3 and the rotor 4. As for the specific structure of the heat dissipation blade 11, the conventional structure in the existing motor can be adopted. At the same time, a vent can be arranged on the motor housing 2 to cooperate with the heat dissipation blade 11 to realize the circulation of air flow.

[0029] During installation, the stator 3 and the motor housing 2 must first be fixedly connected, and the half-shaft core 6 and the rotor 4 are also assembled in advance. Then the combination of the motor housing and the stator is axially connected and fixed to the driven equipment 1. Next, the combination of the half-shaft core 6 and the rotor 4 is axially plugged and connected to the drive shaft 10, and reinforced with connecting bolts 17, and then the radial bearing 9 and the end plate 12 are installed.

[0030] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A driving motor with a half-shaft structure, comprising: A motor housing (2), wherein the motor housing (2) is axially connected to a driven device (1), a stator (3) is arranged on the radial inner side of the motor housing (2), and a rotor (4) is arranged on the radial inner side of the stator (3), characterized in that a half-shaft core (6) is connected to the radial inner side of the rotor (4), a first end (8) of the half-shaft core (6) is connected to the motor housing (2) via a radial bearing (9), and a second end (15) of the half-shaft core (6) is provided with an axial hole (7) for cooperating with a drive shaft (10) of the driven device (1).

2. The driving motor with a half-shaft structure according to claim 1, characterized in that: The motor housing (2) further comprises an end plate (12), wherein the end plate (12) is arranged at a first end of the motor housing (2), the radial bearing (9) is installed at a central position of the end plate (12), and the second end of the motor housing (2) is connected to the driven device (1).

3. The driving motor with a half-shaft structure according to claim 2, characterized in that: The second end of the motor housing (2) is provided with a first connecting flange (13), and the first connecting flange (13) is fixedly connected to a second connecting flange (14) on the driven equipment (1).

4. The driving motor with a half-shaft structure according to claim 1, characterized in that: The first end (8) of the semi-axle core (6) is provided with a connecting bolt (5) which is slidably inserted toward the second end (15) of the semi-axle core, and the connecting bolt (5) is connected to the driving shaft (10) through a thread.

5. The driving motor with a half-shaft structure according to claim 1, characterized in that: A heat dissipation blade (11) is sleeved and installed on the outer circle of the first end (8) of the semi-shaft core (6).

6. The driving motor with a half-shaft structure according to claim 1, characterized in that: The driving motor is a DC motor, an AC asynchronous motor or a permanent magnet synchronous motor.

7. The driving motor with a half-shaft structure according to claim 1, characterized in that: The radial bearing (9) is a rolling bearing, a sliding bearing or a magnetic bearing.

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