Oil cooling motor

Abstract

The utility model relates to an oil-cooled motor, which comprises a cylindrical shell, a cover-shaped head shell for sealing the open end of the cylindrical shell, a stator fixedly connected in the cylindrical shell, and a rotor which supports the cover-shaped head shell and the cylindrical shell and is positioned in the stator, the cover-shaped head shell is provided with an end face groove which is embedded into the adjacent end of the cover-shaped head shell to form a sealing structure, and therefore closed oil containing spaces between the stator and the head shell and between the stator and the closed end of the shell and between the stator and the rotor in the shell are formed. According to the utility model, the penetration of metal dust is avoided, and the service life of the motor is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of electric tools, in particular to an oil-cooling motor. Background Art

[0002] For a long time, motors in power tools like angle grinders have been air-cooled to suppress their temperature rise during operation. However, metal dust generated during the use of these tools inevitably enters the motor through bearing gaps and other factors, affecting the service life of the motor, especially the recently developed high-voltage brushless motors. Summary of the Invention

[0003] The purpose of the utility model is to address the shortcomings of the prior art and to provide an oil-cooled motor that is not only dustproof but also has a good cooling effect.

[0004] To achieve the above objectives, the basic technical solution of the oil-cooled motor of the present invention is as follows: an oil-cooled motor comprising a cylindrical housing, a cap-shaped head shell closing an open end of the cylindrical housing, a stator fixedly connected to the housing, and a rotor supporting the head shell and the housing and located within the stator, characterized in that:

[0005] The head shell is provided with an end face groove embedded in the adjacent end of the shell to form a sealing structure; the inner hole of the head shell is sealed with a head end bearing supporting the rotor; the sealed end of the shell is sealed with a tail end bearing supporting the rotor; thereby forming a closed oil-containing space between the stator and the head shell and the closed end of the shell and the rotor in the shell.

[0006] Furthermore, the rotor has a main shaft, on which a lock nut, a small bevel gear, a washer, and a head end bearing are sequentially sleeved. The lock nut is detachably connected to the main shaft, the small bevel gear is engaged with the output shaft in the cover-shaped head shell, the washer is arranged between the small bevel gear and the head end bearing, and the washer is positioned in the cover-shaped head shell.

[0007] Furthermore, the rotor has a main shaft, the rear end of the main shaft is provided with a brake block, the brake block is located on the rear side of the tail end bearing, the fan is positioned on the brake block, and the fan and the brake block are both located outside the cylindrical shell.

[0008] Furthermore, it also includes a first sealing ring, which is located between the bottom of the end surface groove and the front end surface of the cylindrical shell.

[0009] Furthermore, it also includes a second sealing ring, which is located between the rear end surface of the head shell and the front end surface of the cylindrical shell.

[0010] Furthermore, it also includes a flat washer, which is located between the rear end surface of the head shell and the front end surface of the cylindrical shell, and the flat washer is tightly arranged on the inner wall of the cylindrical shell.

[0011] Furthermore, the cylindrical shell includes an insulating upper cover, an aluminum shell, and an insulating end cover. The insulating upper cover is fixed between the cap-shaped head shell and the aluminum shell, and the insulating end cover is detachably connected to one end of the aluminum shell.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The motor is enclosed in an aluminum shell to prevent dust generated by grinding from entering the motor and affecting its efficiency, thereby increasing its lifespan. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural diagram of an embodiment of the present utility model.

[0015] Figure 2 for Figure 1 Schematic diagram of the three-dimensional exploded structure of the embodiment.

[0016] In the figure: head shell 1, lock nut 2, small bevel gear 3, washer 4, head end bearing 5, first sealing ring 6, end face groove 61, second sealing ring 7, insulating upper cover 8, aluminum shell 9, insulating end cover 10, flat washer 11, tail end bearing 12, stator 13, rotor 14, brake block 15, fan 16, main shaft 17. DETAILED DESCRIPTION

[0017] The oil-cooled motor of this embodiment is as follows Figure 1 and Figure 2 As shown, an oil-cooled motor includes a cylindrical shell, a cover-shaped head shell 1 that closes the open end of the cylindrical shell, a stator 13 fixedly connected to the shell, and a rotor 14 that supports the head shell 1 and the shell and is located in the stator 13. The head shell 1 is provided with an end face groove 61 that is embedded in the adjacent end of the shell to form a sealing structure. The head end bearing 5 that supports the rotor 14 is sealed in the inner hole of the head shell 1; the sealed end of the shell is sealed with a tail end bearing 12 that supports the rotor 14; thereby forming a closed oil-containing space in the shell between the stator 13 and the head shell 1 and the closed end of the shell, as well as between the stator 13 and the rotor 14.

[0018] Furthermore, the rotor 14 has a main shaft 17, on which a lock nut 2, a small bevel gear 3, a washer 4, and a head end bearing 5 are sequentially sleeved. The lock nut 2 is detachably connected to the main shaft 17, the small bevel gear 3 is engaged with the output shaft in the cover-shaped head shell 1, the washer is arranged between the small bevel gear 3 and the head end bearing 5, and the washer 4 is positioned in the cover-shaped head shell 1.

[0019] Furthermore, the rotor 14 has a main shaft 17, and the rear end of the main shaft 17 is provided with a brake shoe 15, which is located on the rear side of the tail end bearing 12, and the fan 16 is positioned on the brake shoe 15. The fan 16 and the brake shoe 15 are both located outside the cylindrical shell.

[0020] Furthermore, a first sealing ring 6 is included, and the first sealing ring 6 is located between the bottom of the end surface groove 61 and the front end surface of the cylindrical shell.

[0021] Furthermore, a second sealing ring 7 is included, and the second sealing ring 7 is located between the rear end surface of the head shell 1 and the front end surface of the cylindrical shell.

[0022] Furthermore, a flat washer 11 is included. The flat washer 11 is located between the rear end surface of the head shell 1 and the front end surface of the cylindrical shell. The flat washer 11 is tightly arranged on the inner wall of the cylindrical shell.

[0023] Furthermore, the cylindrical shell includes an insulating upper cover 8, an aluminum shell 9, and an insulating end cover 10. The insulating upper cover 8 is fixed between the cap-shaped head shell 1 and the aluminum shell 9, and the insulating end cover 10 is detachably connected to one end of the aluminum shell 9.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] The motor is enclosed in the aluminum shell 9 to prevent grinding dust from entering the motor and affecting the efficiency of the motor. It can be seen that the use of the utility model avoids the infiltration of metal dust and increases the life of the motor.

Claims

1. An oil-cooled motor comprising a cylindrical housing, a cap-shaped head shell closing an open end of the cylindrical housing, a stator fixedly connected to the housing, and a rotor supporting the head shell and the housing and located within the stator, characterized in that: The head shell is provided with an end face groove embedded in the adjacent end of the shell to form a sealing structure; the inner hole of the head shell is sealed with a head end bearing supporting the rotor; the sealed end of the shell is sealed with a tail end bearing supporting the rotor; thereby forming a closed oil-containing space between the stator and the head shell and the closed end of the shell and the rotor in the shell.

2. The oil-cooled motor according to claim 1, characterized in that: The rotor has a main shaft, on which a lock nut, a small bevel gear, a washer, and a head end bearing are sequentially sleeved. The lock nut is detachably connected to the main shaft, the small bevel gear is engaged with the output shaft in the cover-shaped head shell, the washer is arranged between the small bevel gear and the head end bearing, and the washer is positioned in the cover-shaped head shell.

3. The oil-cooled motor according to claim 2, characterized in that: The rear end sleeve of the main shaft is provided with a brake block, the brake block is located on the rear side of the tail end bearing, the fan is fixed on the brake block, and the fan and the brake block are both located outside the cylindrical shell.

4. The oil-cooled motor according to claim 3, characterized in that: It also includes a first sealing ring, which is located between the bottom of the end surface groove and the front end surface of the cylindrical shell.

5. The oil-cooled motor according to claim 4, characterized in that: It also includes a second sealing ring, which is located between the rear end surface of the head shell and the front end surface of the cylindrical shell.

6. The oil-cooled motor according to claim 5, characterized in that: It also includes a flat washer, which is located between the rear end surface of the head shell and the front end surface of the cylindrical shell, and is tightly arranged on the inner wall of the cylindrical shell.

7. The oil-cooled motor according to claim 6, characterized in that: The cylindrical shell comprises an insulating upper cover, an aluminum shell and an insulating end cover. The insulating upper cover is fixed between the cap-shaped head shell and the aluminum shell, and the insulating end cover is detachably connected to one end of the aluminum shell.

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