CN211193359U - Novel hand-held type electricity grinds - Google Patents

Abstract

The utility model discloses a novel hand-held electric grinder, which comprises a casing, a front end sleeve and a chuck, wherein the front end surface of the casing is fixedly provided with an aluminum intermediate cover, and the front end sleeve is connected with the casing through the aluminum intermediate cover; a push button is embedded in the shell of the shell and connected with a pull rod switch; an outer rotor motor is also arranged in the machine shell and is provided with a motor shaft; one end of the motor shaft is connected with a first bearing arranged in the shell, the other end of the motor shaft is fixedly connected with a connector, and the connector is fixedly arranged in the middle cover of the aluminum piece and is connected with an output shaft; the output shaft is positioned in the front end sleeve and is fixedly connected with the chuck, and a second bearing is further arranged on the output shaft. The electric grinder adopts the outer rotor motor to directly output power to drive the drill bit of the electric grinder to rotate, does not need other speed change mechanisms to transmit power, does not have the abrasion condition of the speed change mechanisms, effectively reduces energy loss, prolongs the service life of the electric grinder and also improves output power.

Description

Novel hand-held type electricity grinds

Technical Field

The utility model relates to an electric grinder especially relates to a novel hand-held type electric grinder.

Background

The electric grinder is commonly called as a grinding head machine, is an indispensable electric tool in the industries such as die industry, machining industry, furniture and the like, and the consumption of the electric grinder is continuously increased along with the rapid development of economy in China. At present, all electric grinders in the market adopt an inner rotor motor as a power mechanism to drive a grinding head at the front end of the electric grinder to rotate; however, the inner rotor motor has the defect of high torque and low torque during power transmission, so that the output power is low, and more energy consumption is consumed.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects of the prior art, the utility model provides a novel handheld electric grinder.

In order to solve the technical problem, the utility model discloses a technical scheme is: a novel handheld electric grinder comprises a machine shell, a front end sleeve and a chuck, wherein an aluminum intermediate cover is fixedly arranged on the front end surface of the machine shell, and the front end sleeve is connected with the machine shell through the aluminum intermediate cover; a push button is embedded in the shell of the shell, the push button is connected with a pull rod switch, and the pull rod switch is positioned in the shell;

an outer rotor motor is also arranged in the machine shell and is provided with a motor shaft; one end of the motor shaft is connected with a first bearing which is fixedly arranged in the shell; the other end of the motor shaft is fixedly connected with a connector which is fixedly arranged in the middle cover of the aluminum piece and is connected with an output shaft;

the output shaft is positioned in the front end sleeve, and a second bearing is arranged on the output shaft and is fixedly arranged in the front end sleeve and positioned at one end of the output shaft connected with the connector;

the chuck is located the front end of front end sleeve, and the chuck extends to in the front end sleeve and with output shaft fixed connection.

Furthermore, the output shaft is also provided with a shaft check ring, and the shaft check ring is positioned at one end of the second bearing.

Furthermore, the outer rotor motor also comprises a fan blade, an outer rotor and an inner stator, wherein the inner stator is sleeved on the motor shaft, the outer rotor is sleeved outside the inner stator and fixedly connected with the motor shaft, and the fan blade is sleeved on the motor shaft and fixedly connected with the outer rotor.

Furthermore, an aluminum bracket is arranged on one side of the outer rotor motor, and the aluminum bracket is fixedly installed in the machine shell and fixedly connected with the inner stator.

The utility model discloses a novel hand-held type electricity grinds adopts the external rotor motor as power unit, through the direct output power of the motor shaft of external rotor motor, effectively reduces energy loss, improves output. Meanwhile, the outer rotor motor arranged in the shell has a stable mounting structure, and the grinding head of the electric grinder driven by the outer rotor motor can work normally.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of the internal structure of fig. 1.

In the figure: 1. a housing; 2. a push button; 3. a front end sleeve; 4. a chuck; 5. an aluminum intermediate cover; 6. a pull rod switch; 7. a first bearing; 8. a fan blade; 9. an outer rotor; 10. an inner stator; 11. a motor shaft; 12. a connector; 13. a second bearing; 14. a retainer ring for a shaft; 15. an output shaft; 16. an aluminum bracket.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 and 2, the novel handheld electric grinder comprises a casing 1, a front end sleeve 3 and a chuck 4, wherein an aluminum intermediate cover 5 is fixedly arranged on the front end surface of the casing 1, the casing 1 is wrapped by the aluminum intermediate cover 5, and meanwhile, the aluminum intermediate cover 5 is more convenient for connecting the front end sleeve 3 with the casing 1; the front end sleeve 3 is connected to the front end of the shell 1, so that the output shaft 15 is protected, and meanwhile, the connection between the chuck 4 and the output shaft 15 is facilitated; the chuck 4 is a chuck which is universal for electric grinding and is used for fixing a grinding head of the electric grinding.

Meanwhile, as shown in fig. 2, a push button 2 is embedded in the housing of the housing 1, the push button 2 is connected with a pull rod switch 6, the pull rod switch 6 is located in the housing 1, and the push button 2 is exposed out of the housing 1, so that the operation is more convenient; the pull rod switch 6 is a working switch of the novel handheld electric grinder, the pull rod switch 6 is used for starting or closing the outer rotor motor in a power supply control mode commonly used in the industry, the pull rod switch is electrically connected with a controller, such as a switch power supply chip TB6812, and the controller is respectively and electrically connected with a plug and the outer rotor motor, so that when the pull rod switch 6 is closed, power is supplied to the outer rotor motor, and the outer rotor motor works; when the pull rod switch 6 is turned off, the power supply to the outer rotor motor is stopped, and the outer rotor motor does not work. For the power supply, can be alternating current, also can be the direct current, set up the plug that is connected with the controller electricity on the casing 1 of electric mill, the plug passes through the transformer and connects alternating current power supply, or the plug direct connection battery package (direct current) to realize the power supply.

For the utility model discloses a novel hand-held type electric grinder compares with traditional electric grinder, is provided with the external rotor motor in casing 1, adopts the external rotor motor as power unit, utilizes the advantage that the external rotor motor has higher output torque and output, and direct output power drives the bistrique work of electric grinder, has effectively reduced energy loss. The outer rotor motor has the following setting modes: as shown in fig. 2, the outer rotor motor has a motor shaft 11; the wind driven generator further comprises a wind blade 8, an outer rotor 9 and an inner stator 10, wherein the inner stator 10 is sleeved on the motor shaft 11, the outer rotor 9 is sleeved outside the inner stator 10 and fixedly connected with the motor shaft 11, and the wind blade 8 is sleeved on the motor shaft 11 and fixedly connected with the outer rotor 9. Meanwhile, in order to further improve the stability of the inner stator 10, an aluminum bracket 16 is disposed at one side of the outer rotor motor, and the aluminum bracket 16 is fixedly installed in the casing 1 and is fixedly connected with the inner stator. Meanwhile, one end of the motor shaft 11 is connected with a first bearing 7, and the first bearing 7 is fixedly arranged in the machine shell 1; the other end of the motor shaft 11 is fixedly connected with a connector 12, the motor shaft 11 is connected with an output shaft 13 through the connector 12, a second bearing 13 is arranged on the output shaft 15, and the second bearing 13 is fixedly arranged in the front end sleeve 3 and is positioned at one end, connected with the connector 12, of the output shaft 15; connect motor shaft 11 and output shaft 15 by connector 12, connector 12 sets firmly in aluminium spare intermediate cover 5 to prevent that connector 12 from rocking, and, further support motor shaft 11 and output shaft 15 jointly by a bearing 7, No. two bearings 13, effectively ensure this novel hand-held type electric drill external rotor motor's job stabilization nature. In addition, in order to further provide the stability of the second bearing 14, a shaft retainer 14 is also mounted on the output shaft 15, and the shaft retainer 14 is positioned at one end of the second bearing 13.

The output shaft 15 is located in the front end sleeve 3, the output shaft 15 serves as an output end of the motor shaft 11 and is connected with the chuck 4, the chuck 4 is located at the front end of the front end sleeve 3, and the chuck 4 extends into the front end sleeve 3 and is fixedly connected with the output shaft 15, so that the outer rotor motor drives the grinding head in the chuck 4 to rotate to work.

The utility model discloses a hand-held type electric grinder adopts external rotor motor direct output power, and the drill bit that drives the electric grinder rotates, need not other speed change mechanism and carries out power transmission, does not have speed change mechanism's the wearing and tearing condition, also effectively reduces energy loss, has improved the life of electric grinder, also improves output.

The above embodiments are not intended to limit the present invention, and the present invention is not limited to the above examples, and the technical personnel in the technical field are in the present invention, which can also belong to the protection scope of the present invention.

Claims (4)

1. The utility model provides a novel hand-held type electricity grinds, includes casing (1), front end sleeve (3), chuck (4), its characterized in that: an aluminum intermediate cover (5) is fixedly arranged on the front end face of the machine shell (1), and the front end sleeve (3) is connected with the machine shell (1) through the aluminum intermediate cover (5); a push button (2) is embedded in the shell of the machine shell (1), the push button (2) is connected with a pull rod switch (6), and the pull rod switch (6) is positioned in the machine shell (1);

an outer rotor motor is also arranged in the machine shell (1), and is provided with a motor shaft (11); one end of the motor shaft (11) is connected with a first bearing (7), and the first bearing (7) is fixedly arranged in the shell (1); the other end of the motor shaft (11) is fixedly connected with a connector (12), the connector (12) is fixedly arranged in the aluminum piece middle cover (5), and the connector (12) is connected with an output shaft (15);

the output shaft (15) is positioned in the front end sleeve (3), a second bearing (13) is arranged on the output shaft (15), and the second bearing (13) is fixedly arranged in the front end sleeve (3) and positioned at one end of the output shaft (15) connected with the connector (12);

the chuck (4) is positioned at the front end of the front end sleeve (3), and the chuck (4) extends into the front end sleeve (3) and is fixedly connected with the output shaft (15).

2. The novel hand-held electric grinder as claimed in claim 1, wherein: and the output shaft (15) is also provided with a shaft retainer ring (14), and the shaft retainer ring (14) is positioned at one end of the second bearing (13).

3. The novel hand-held electric grinder as claimed in claim 1, wherein: the outer rotor motor further comprises a fan blade (8), an outer rotor (9) and an inner stator (10), the inner stator (10) is sleeved on the motor shaft (11), the outer rotor (9) is sleeved outside the inner stator (10) and fixedly connected with the motor shaft (11), and the fan blade (8) is sleeved on the motor shaft (11) and fixedly connected with the outer rotor (9).

4. The novel hand-held electric grinder as claimed in claim 3, wherein: an aluminum support (16) is arranged on one side of the outer rotor motor, and the aluminum support (16) is fixedly installed in the machine shell (1) and fixedly connected with the inner stator.

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