Oil-cooled motor and high-pressure brushless angle grinder using same

Abstract

The utility model relates to an oil cooling motor and a high-voltage brushless angle grinder using the same, the oil cooling motor comprises an insulating end cover at the front end and an insulating upper cover at the rear end, the insulating end cover and the insulating upper cover are provided with an aluminum shell, and a motor and liquid cooling oil are arranged in the aluminum shell. By adopting the high-voltage brushless angle grinder, especially in a severe environment of metal dust, dust and the like are prevented from entering the motor, the heat dissipation efficiency of the motor is improved, the service life of the motor is ensured, and the durability of the high-voltage brushless angle grinder is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of angle grinders, in particular to an oil-cooling motor and a high-voltage brushless angle grinder using the oil-cooling motor. Background Art

[0002] Traditional motors use a stator fixed in the casing. Since air cooling is used to cool the motor, the rotor will suck in iron powder from the outside of the casing through the vents. Since the stator or rotor of the motor is made of magnetic material, such as neodymium iron boron or ferrite, it will absorb iron powder. Once too much iron powder is absorbed, it will cause iron to be stuck in the motor, affecting the life of the motor. Utility Model Content

[0003] The purpose of the utility model is to provide an oil-cooled motor structure and a high-pressure brushless angle grinder with the motor to address the problems existing in the prior art. The motor is oil-cooled and will not inhale iron powder, thereby ensuring the life of the motor.

[0004] In order to achieve the above-mentioned purpose, the basic technical solution of the oil-cooled motor of the utility model is:

[0005] An oil-cooled motor comprises a head shell at the front end and an insulating end cover at the rear end, an insulating upper cover and an aluminum shell are arranged between the head shell and the insulating end cover, an oil containing space is formed among the insulating upper cover, the aluminum shell, the head shell and the insulating end cover, and a motor and liquid cooling oil are arranged in the oil containing space.

[0006] Furthermore, an oil seal is provided at the insulating end cover, and a sealing ring is provided at the insulating end cover.

[0007] Furthermore, heat dissipation ribs are arranged on the outer side of the aluminum shell.

[0008] Furthermore, the motor includes a stator and a rotor. The rotor has a main shaft. The main shaft extends from the insulating upper cover side to the outer side of the insulating end cover. The main shaft is provided with fan blades.

[0009] A high-voltage brushless angle grinder using an oil-cooled motor comprises: a head shell, a head shell supporting shield, an output shaft is arranged in the shield, an insulating end cover is provided at the rear end, an insulating upper cover and an aluminum shell are arranged between the head shell and the insulating end cover, an oil containing space is formed between the insulating upper cover, the aluminum shell, the head shell and the insulating end cover, a motor and liquid cooling oil are arranged in the oil containing space, the motor has a main shaft, and the main shaft is vertically meshed with the output shaft.

[0010] Furthermore, the motor includes a stator and a rotor, the rotor has a main shaft, a motor fixing sleeve is arranged on the main shaft, the stator is fixed on the motor fixing sleeve, a front bearing is arranged at the front end of the main shaft, and the front bearing supports the head shell.

[0011] Furthermore, the main shaft extends from the insulating upper cover side to the outer side of the insulating end cover, and the main shaft is provided with fan blades.

[0012] Furthermore, a rear bearing is provided at the rear end of the main shaft, an oil seal is provided at the insulating end cover, the oil seal is located between the rear bearing and the insulating end cover, a sealing ring is provided at the insulating end cover, and the sealing ring is provided between the head shell and the insulating upper cover.

[0013] Furthermore, heat dissipation ribs are arranged on the outside of the aluminum shell, the heat dissipation ribs are evenly distributed along the circumferential direction of the aluminum shell, and the heat dissipation ribs extend axially.

[0014] Furthermore, the aluminum shell is cylindrical, and the heat dissipation ribs are made of aluminum.

[0015] The beneficial effect of the utility model is that when working, the cooling oil is input from the inlet and fills the entire oil space in the shell, so that the cooling oil is stirred during the operation of the motor rotor, fully absorbs the internal heat of the motor, and exchanges heat with the shell, and then dissipates heat to the air through the aluminum heat dissipation ribs, thereby obtaining an ideal cooling effect. It can be seen that the use of the utility model not only prevents dust and other dust from entering the motor in a harsh environment of metal dust, but also has a good cooling effect, is safe and reliable, and is cost-effective, ensuring the life of the motor and improving the durability of the high-voltage brushless angle grinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the oil-cooled motor in the high-pressure brushless angle grinder of the utility model.

[0017] Figure 2 A side view of the structure of an oil-cooled motor.

[0018] Figure 3 for Figure 2 Cross-section at AA.

[0019] Figure 4 This is a schematic diagram of the structure of the high-pressure brushless angle grinder of the utility model.

[0020] Explanation of the reference numerals: head shell 10; insulating end cover 11; oil seal 111; insulating upper cover 12; sealing ring 121; aluminum shell 13; heat dissipation rib 131; motor 14; stator 141; motor fixing sleeve 142; rotor 143; main shaft 15; front bearing 151; rear bearing 152; fan blade 153; shield 16; output shaft 161. DETAILED DESCRIPTION Example

[0021] The oil-cooled motor of this embodiment is Figure 1As shown, the front end includes a head shell 10, the rear end includes an insulating end cover 11, an insulating upper cover 12 and an aluminum shell 13 are arranged between the head shell 10 and the insulating end cover 11, and an oil containing space is formed between the insulating upper cover 12, the aluminum shell 13, the head shell 10, and the insulating end cover 11, and a motor and liquid cooling oil are arranged in the oil containing space. The aluminum shell 13 is arranged to facilitate the temperature of the liquid cooling oil to be brought out, thereby reducing the temperature of the motor and improving the efficiency and life of the motor.

[0022] like Figure 2 and Figure 3 As shown, an oil seal 111 is provided at the insulating end cover 11, and a sealing ring 121 is provided at the insulating end cover 11. Therefore, leakage of cooling oil inside the aluminum shell 13 is prevented.

[0023] The aluminum shell 13 is provided with heat dissipation ribs 131 on its outer side, thereby improving the heat dissipation efficiency of the aluminum shell 13.

[0024] The motor includes a stator 141 and a rotor 143. The rotor 143 has a main shaft 15. The main shaft 15 extends from the insulating upper cover 12 to the outside of the insulating end cover 11. The main shaft 15 is provided with a fan blade 153. Therefore, negative pressure is generated by the fan blade 153, and the heat on the heat dissipation rib 131 outside the aluminum shell 13 is extracted from the casing, thereby reducing the temperature of the motor and reducing the temperature rise of the motor.

[0025] like Figure 4 As shown, a high-voltage brushless angle grinder using an oil-cooled motor includes: a head shell 10, the head shell 10 supports a shield 16, an output shaft 161 is arranged in the shield 16, an insulating end cover 11 is arranged at the rear end, an insulating upper cover 12 and an aluminum shell 13 are arranged between the head shell 10 and the insulating end cover 11, a groove is arranged at the end of the head shell 10, the insulating upper cover 12 is inserted into the groove, an oil-containing space is formed between the insulating upper cover 12, the aluminum shell 13, the head shell 10, and the insulating end cover 11, a motor and liquid cooling oil are arranged in the oil-containing space, and the motor has a main shaft 15, and the main shaft 15 is vertically meshed with the output shaft 161. Therefore, the insulation problem of the oil-cooled motor used in the high-voltage brushless angle grinder is prevented.

[0026] The motor includes a stator 141 and a rotor 143 . The rotor 143 has a main shaft 15 . A motor fixing sleeve 142 is provided on the main shaft 15 . The stator 141 is fixed on the motor fixing sleeve 142 . A front bearing 151 is provided at the front end of the main shaft 15 . The front bearing 151 supports the head shell 10 .

[0027] The main shaft 15 extends from the insulating upper cover 12 to the outside of the insulating end cover 11, and a fan blade 153 is arranged on the main shaft 15. The fan blade 153 is used to absorb the heat on the aluminum shell 13 to reduce the temperature rise of the motor.

[0028] A rear bearing 152 is provided at the rear end of the main shaft 15, an oil seal 111 is provided at the insulating end cover 11, the oil seal 111 is located between the rear bearing 152 and the insulating end cover 11, a sealing ring 121 is provided at the insulating end cover 11, and the sealing ring 121 is provided between the head shell 10 and the insulating upper cover 12. Therefore, a sealed space is formed to prevent cooling oil from leaking from the oil space.

[0029] The aluminum shell 13 is provided with heat dissipation ribs 131 on the outside. The heat dissipation ribs 131 are evenly distributed along the circumference of the aluminum shell 13 and extend axially. This further increases the heat dissipation area of ​​the aluminum shell 13 and improves the heat dissipation efficiency. The aluminum shell 13 is cylindrical, and the heat dissipation ribs 131 are made of aluminum.

[0030] The working of the utility model is as follows: when working, cooling oil is input from the inlet and fills the entire oil-containing space in the shell, so that the cooling oil is stirred during the operation of the rotor 143 when the motor is powered on, and the cooling oil fully absorbs the heat generated by the movement of the motor, and exchanges heat with the aluminum shell 13 through heat transfer, and then dissipates heat to the casing through the aluminum heat dissipation ribs 131, and utilizes the negative pressure generated by the fan blades 153 to draw heat from the casing to the outside of the angle grinder, thereby obtaining an ideal cooling effect for the motor.

[0031] In addition to the above embodiments, the present invention may also have other implementations. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the present invention.

Claims

1. An oil-cooled motor, characterized in that: The invention comprises a head shell at the front end and an insulating end cover at the rear end, an insulating upper cover and an aluminum shell are arranged between the head shell and the insulating end cover, an oil containing space is formed among the insulating upper cover, the aluminum shell, the head shell and the insulating end cover, and a motor and liquid cooling oil are arranged in the oil containing space.

2. The oil-cooled motor according to claim 1, characterized in that: An oil seal is arranged at the insulating end cover, and a sealing ring is arranged at the insulating upper cover.

3. The oil-cooled motor according to claim 2, characterized in that: Heat dissipation ribs are arranged on the outside of the aluminum shell.

4. The oil-cooled motor according to claim 3, characterized in that: The motor comprises a stator and a rotor. The rotor has a main shaft, which extends from the insulating upper cover side to the outer side of the insulating end cover. The main shaft is provided with fan blades.

5. A high-pressure brushless angle grinder using an oil-cooled motor, characterized in that: include: A head shell supports a protective cover, an output shaft is arranged in the protective cover, an insulating end cover is provided at the rear end, an insulating upper cover and an aluminum shell are arranged between the head shell and the insulating end cover, an oil containing space is formed between the insulating upper cover, the aluminum shell, the head shell and the insulating end cover, a motor and liquid cooling oil are arranged in the oil containing space, the motor has a main shaft, and the main shaft is vertically meshed with the output shaft.

6. The high-pressure brushless angle grinder according to claim 5, characterized in that: The motor comprises a stator and a rotor. The rotor has a main shaft. A motor fixing sleeve is arranged on the main shaft. The stator is fixed on the motor fixing sleeve. A front bearing is arranged at the front end of the main shaft. The front bearing supports the head shell.

7. The high-pressure brushless angle grinder according to claim 6, characterized in that: The main shaft extends from the insulating upper cover side to the outer side of the insulating end cover, and the main shaft is provided with fan blades.

8. The high-pressure brushless angle grinder according to claim 7, characterized in that: A rear bearing is arranged at the rear end of the main shaft, an oil seal is arranged at the insulating end cover, the oil seal is located between the rear bearing and the insulating end cover, a sealing ring is arranged at the insulating end cover, and the sealing ring is arranged between the head shell and the insulating upper cover.

9. The high-pressure brushless angle grinder according to claim 8, characterized in that: Heat dissipation ribs are arranged on the outside of the aluminum shell. The heat dissipation ribs are evenly distributed along the circumferential direction of the aluminum shell and extend axially.

10. The high-pressure brushless angle grinder according to claim 9, characterized in that: The aluminum shell is cylindrical, and the heat dissipation ribs are made of aluminum.

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