Motor structure

Abstract

The utility model discloses a motor structure. Comprising a motor shell, the front end of the motor shell comprises a limiting plate, and the limiting plate is provided with one or more oil passing holes communicated with fluid in an inner cavity of the motor shell; the front end cover is arranged at the front end of the motor shell and comprises an oil inlet communicated with fluid of the oil passing hole; and the rear end cover is arranged at the rear end of the motor shell and comprises an oil outlet which is communicated with fluid of the oil passing hole. Oil in the oil tank is pumped into the motor through pressure generated by movement of the gear at the front end of the motor and enters the motor shell through the oil passing hole to cool and lubricate the stator and the rotor, then the oil is discharged into the oil tank through the oil outlet, the structure is simple, and the cooling and lubricating effects are good.

Description

Technical Field

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

[0002] As industrial automation continues to improve, the requirements for motor performance are also increasing. Especially in some high-load, long-running application scenarios, how to effectively control motor temperature has become a pressing issue.

[0003] Existing motor cooling methods typically use the following three methods: natural cooling, air cooling, and casing liquid cooling. Casing liquid cooling offers superior heat dissipation compared to both natural and air cooling methods. With casing liquid cooling, cooling water channels are typically provided within the casing, separated from the internal structure. These channels serve only for cooling and are not used for lubrication. Lubrication of the motor relies on lubricating oil applied to the internal structure of the casing. In other words, in existing technology, motor lubrication and cooling are typically separate.

[0004] Therefore, how to make the lubrication and cooling phase structure play both lubrication and cooling roles is a technical problem that needs to be solved urgently. Utility Model Content

[0005] The utility model aims to solve the deficiencies in the prior art and provides a motor structure in which a lubricating oil channel is designed inside the motor and the lubricating oil is caused to circulate, so that the lubricating oil can be used not only for lubrication but also for cooling.

[0006] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0007] A motor structure comprising

[0008] The motor housing includes a limit plate at the front end, and the limit plate is provided with one or more oil holes in fluid communication with the inner cavity of the motor housing;

[0009] a front end cover mounted on the front end of the motor housing and comprising an oil inlet in fluid communication with the oil hole; and

[0010] The rear end cover is mounted on the rear end of the motor housing and includes an oil outlet in fluid communication with the oil hole.

[0011] In the above technical solution, preferably, a through hole for the rotor to pass through is opened in the middle of the limiting plate.

[0012] In the above technical solution, preferably, a stator is installed in the motor housing, and a gap is provided between the stator and the inner wall of the motor housing, which is in fluid communication with the oil hole.

[0013] In the above technical solution, preferably, the outer wall of the stator includes a plurality of protrusions for abutting against the inner wall of the motor housing.

[0014] In the above technical solution, preferably, a plurality of through slots are uniformly provided on the stator in a circumferential direction.

[0015] In the above technical solution, preferably, the limiting plate includes a lower portion without the oil holes and an upper portion with the oil holes, and the oil holes are uniformly arranged in the circumferential direction at the upper portion of the limiting plate.

[0016] In the above technical solution, preferably, the oil inlet is connected to the oil tank through a pipeline, and the oil tank is connected to the oil outlet through a pipeline.

[0017] In the above technical solution, preferably, an oil pump for pumping the oil in the oil tank into the front end of the motor housing is installed on the motor housing or the front end cover.

[0018] In the above technical solution, preferably, a ring gear is installed at the front end of the motor housing, a main gear is connected to the front end of the motor rotor, and a plurality of planetary gears are arranged between the ring gear and the main gear, and the planetary gears are meshed with the ring gear and the main gear respectively;

[0019] When the front end cover is installed on the motor housing, a receiving chamber for accommodating the planetary gear and the ring gear is formed between the two, and the receiving chamber is fluidically connected to the oil inlet so that when the planetary gear is driven to operate, the oil in the oil tank can be drawn into the receiving chamber.

[0020] In the above technical solution, preferably, a planetary frame is also included, which includes a main frame body and a plurality of connecting heads arranged on the inside of the main frame body, and an output head arranged on the outside of the main frame body. The connecting heads are passed through the corresponding planetary gears to drive the output heads to rotate and output power through the circumferential movement of the planetary gears.

[0021] The beneficial effects of the utility model are:

[0022] The utility model uses the pressure generated by the movement of the gear at the front end of the motor to draw the oil in the oil tank into the motor, and enters the motor housing through the oil hole to cool and lubricate the stator and rotor, and then discharges the oil into the oil tank through the oil outlet. The structure is simple and the cooling and lubricating effects are good. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the utility model.

[0024] Figure 2 This is a schematic diagram of the utility model in an exploded state.

[0025] Figure 3 This is a schematic diagram of the front end structural layout of the motor housing of the present invention.

[0026] Figure 4 This is a schematic diagram of the motor housing of the present utility model.

[0027] Figure 5 This is a schematic diagram of the matching state of the motor housing and stator of the utility model.

[0028] Figure 6 This is a schematic diagram of the front end cover of the present invention.

[0029] Figure 7 It is a schematic diagram of the rear end cover of the utility model.

[0030] Figure 8 This is a schematic diagram of the planetary carrier of the present utility model.

[0031] Figure 9 This is a schematic diagram of the motor gearbox structure of the utility model. DETAILED DESCRIPTION

[0032] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0033] See also Figures 1-9 , including a motor housing 1, a front end cover 2 and a rear end cover 3, wherein the front end cover 2 is installed at the front end of the motor housing 1, and the rear end cover 3 is installed at the rear end of the motor housing 1. The outer periphery of the front end cover 2 includes an annular extension wall to form a cavity inside it, and after the front end cover 2 is installed on the motor housing 1, a receiving cavity for accommodating related components is formed.

[0034] In this embodiment, the front end cover 2 includes an oil inlet 21, which is connected to an oil tank (not shown in the figure) through a pipeline. The oil tank is used to accommodate oil for lubrication and cooling, such as engine oil or lubricating oil; the rear end cover 3 includes an oil outlet 31, which is connected to the oil tank through a pipeline, serving as a flow path for the external fluid of the motor.

[0035] In this embodiment, the front end of the motor housing 1 includes a limit plate 4. In one embodiment, the limit plate 4 is welded to or integrally formed with the main body of the motor housing 1. One or more oil holes 41 are defined in the limit plate 4. These holes 41 connect the accommodating chamber with the inner cavity of the motor housing. The accommodating chamber, in turn, connects to the oil inlet 41, which in turn connects to the oil outlet 31, serving as a fluid flow path within the motor.

[0036] Thus, the oil tank is fluidically connected to the oil inlet 21 through a pipeline, so that the oil in the oil tank can enter the accommodating chamber through the oil inlet 21, lubricate and cool the components arranged in the accommodating chamber, and then enter the inner cavity of the motor housing through the oil hole 41, lubricate and cool the components (including the stator and rotor) in the inner cavity of the motor housing, and finally flow back to the oil tank through the oil outlet 31.

[0037] The cooling at the oil tank can be done by natural cooling, air cooling or water cooling to cool the oil in the tank.

[0038] As one embodiment, the limiting plate 4 includes a lower portion 42 without an oil hole 41 and an upper portion with an oil hole 41. The lower portion 42 of the limiting plate 4 does not have an oil hole 41 so that the oil can accumulate there. A certain amount of oil can be stored to help the oil flow speed in the motor and improve the oil coverage in the motor. The upper portion of the limiting plate 4 can be evenly circumferentially provided with multiple oil holes 41, such as Figure 4 shown.

[0039] Furthermore, a stator 5 is installed in the motor housing 1. There is a gap 52 between the stator 5 and the inner wall of the motor housing 1, which is in fluid communication with the oil hole 41. After passing through the oil hole 41, the oil flows back to the oil outlet 31 through the gap 52. Part of the oil can splash onto the stator and rotor to lubricate them, and the reflux process in the gap 52 mainly plays a cooling role.

[0040] Due to the existence of the gap, in order to position the stator 5, in this embodiment, a plurality of protrusions 53 are provided on the outer wall of the stator 5 for abutting the inner wall of the motor housing 1. The provision of the protrusions 53 can not only effectively position the stator 5, but also will not affect the normal return flow of the oil.

[0041] The stator 5 is provided with a plurality of through slots 51 , which are arranged axially along the motor housing 1 , with one end opening connected to the corresponding oil hole 41 . The through slots 51 can be evenly arranged circumferentially on the stator 5 .

[0042] One end of the rotor 6 mounted on the motor housing 1 extends outside the motor housing 1 . Accordingly, a through hole 43 for the rotor 6 to pass through is defined in the middle of the limiting plate 4 .

[0043] As for how to pump the oil in the oil tank into the motor, an oil pump can be installed on the motor housing 1 or the front end cover 2, and the oil in the oil tank can be pumped into the motor through the oil pump.

[0044] As another embodiment, the oil in the oil tank can be drawn into the motor by relying on the pressure generated by the gearbox of the motor after startup. The relevant structure of the gearbox can refer to the Chinese patent application document 202421670737X filed by the applicant on July 15, 2024. A reduction motor, specifically, a ring gear 71 is installed at the front end of the motor housing 1, and a main gear 72 is connected to the front end of the rotor 6. Several planetary gears 73 are arranged between the ring gear 71 and the main gear 72. The planetary gears 73 are meshed with the ring gear 71 and the main gear 72 respectively, and also include a planetary carrier. The planetary carrier includes a main frame body 74 and several connecting heads 75 arranged on the inner side of the main frame body 74, and an output head 76 arranged on the outer side of the main frame body 74. The connecting head 75 is passed through the corresponding planetary gear 73 to drive the output head 76 to rotate and output power through the circumferential movement of the planetary gear 73.

[0045] That is, when the planetary gear 73 is driven to operate, the oil in the oil tank can be drawn into the accommodating chamber, and at the same time, through the movement of the planetary gear 73, the oil is thrown to the oil hole 41, enters the motor housing 1 through the oil hole 41, and finally flows back to the oil tank through the oil outlet 31, forming a circulation path for lubrication and cooling.

[0046] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A motor structure, characterized in that: include The motor housing includes a limit plate at the front end, and the limit plate is provided with one or more oil holes in fluid communication with the inner cavity of the motor housing; A front end cover is mounted on the front end of the motor housing and includes an oil inlet in fluid communication with the oil hole; as well as The rear end cover is mounted on the rear end of the motor housing and includes an oil outlet in fluid communication with the oil hole.

2. The motor structure according to claim 1, characterized in that: A through hole is provided in the middle of the limiting plate for the rotor to pass through.

3. The motor structure according to claim 1, characterized in that: A stator is installed in the motor housing, and a gap is provided between the stator and the inner wall of the motor housing, which is in fluid communication with the oil hole.

4. The motor structure according to claim 3, characterized in that: The outer wall of the stator includes a plurality of protrusions for abutting against the inner wall of the motor housing.

5. The motor structure according to claim 3, characterized in that: The stator is evenly provided with a plurality of through slots in a circumferential direction.

6. A motor structure according to any one of claims 1 to 4, characterized in that: The limiting plate includes a lower portion without the oil holes and an upper portion with the oil holes. The oil holes are evenly distributed in the circumferential direction at the upper portion of the limiting plate.

7. The motor structure according to claim 1, characterized in that: The oil inlet is connected to the oil tank through a pipeline, and the oil tank is connected to the oil outlet through a pipeline.

8. The motor structure according to claim 7, characterized in that: An oil pump for pumping the oil in the oil tank into the front end of the motor housing is installed on the motor housing or the front end cover.

9. The motor structure according to claim 7, characterized in that: A ring gear is installed at the front end of the motor housing, and a main gear is connected to the front end of the motor rotor. A plurality of planetary gears are arranged between the ring gear and the main gear, and the planetary gears are meshed with the ring gear and the main gear respectively; When the front end cover is installed on the motor housing, a receiving chamber for accommodating the planetary gear and the ring gear is formed between the two, and the receiving chamber is fluidically connected to the oil inlet so that when the planetary gear is driven to operate, the oil in the oil tank can be drawn into the receiving chamber.

10. The motor structure according to claim 9, characterized in that: It also includes a planetary frame, which includes a main frame body, a plurality of connecting heads arranged on the inside of the main frame body, and an output head arranged on the outside of the main frame body. The connecting heads are passed through the corresponding planetary gears to drive the output heads to rotate and output power through the circumferential movement of the planetary gears.

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