CN212977827U

CN212977827U - Direct-drive electric angle grinder

Info

Publication number: CN212977827U
Application number: CN202021280391.4U
Authority: CN
Inventors: 柳文; 赵乾麟; 周群; 赵屹; 方炳平; 管秀玉; 李光祖; 黄乾利; 周长妹
Original assignee: Zhejiang Cheering Sewing Machine Co ltd
Current assignee: Zhejiang Cheering Sewing Machine Co ltd
Priority date: 2020-07-04
Filing date: 2020-07-04
Publication date: 2021-04-16
Anticipated expiration: 2030-07-04

Abstract

The utility model discloses a directly drive electronic angle mill, including aircraft nose and handle casing, brushless motor's drive module installs in the handle casing, and the aircraft nose portion of casing is equipped with the louvre, and the tail end of handle is equipped with cooling fan, and handle shell is equipped with the air intake with cooling fan's fan blade department of being relative, forms an inside cooling air duct of organism from the air intake of handle shell tail end to the louvre of aircraft nose portion. Because the utility model discloses cooling air duct has been set up inside the angle grinder to provide the cooling air by installing in the special radiator fan of handle tail end, not only guaranteed the cooling of setting at the control module at handle middle part, also because of increaseing air intake and operating device's distance, this probability that the dust that just reduces the work portion and produce gets into the motor inside.

Description

Direct-drive electric angle grinder

Technical Field

The utility model relates to an electric tool technical field especially relates to a directly drive angle mill.

Background

An electric angle grinder is a grinding tool for grinding, cutting, derusting, and polishing metal members using a thin grinding wheel, a rubber grinding wheel, a wire wheel, and the like that rotate at high speed. In order to improve the work efficiency of electronic angle mill, the applicant has proposed the utility model patent application of 201921202136.5 'a directly drive electronic angle mill', improved the electronic angle mill of drive mode of conventional angle mill, and its realization basis is utilizing high power density brushless motor to replace the series excited machine, has realized that the motor directly drives the working shaft. The direct-drive electric angle grinder generally comprises a motor, a grinding head box, a grinding wheel, a grinding head handle and other components, wherein the grinding wheel arranged on a shaft head is driven by a main shaft of the motor to rotate to work. After the brushless motor is used for realizing the direct drive of the angle grinder, the heat dissipation effect of the motor is close to the work efficiency of the special motor of the guest, so that the heat dissipation design of the angle grinder directly influences the service life of the machine. The existing heat dissipation design of the angle grinder is generally to arrange a heat dissipation fan at a machine head. When the motor works, the fan works simultaneously, and cooling air is introduced from the front end or the rear end of the machine head to dissipate heat of the motor. However, when the brushless motor works, the control module of the motor needs to be cooled at the same time, so that when the brushless motor is used as the driving power of the existing angle grinder instead, the cooling system of the existing angle grinder cannot effectively provide cooling for the control module, and the working efficiency of the brushless angle grinder is reduced. In addition, when the angle grinder works, a large amount of dust is often generated, and due to the ventilation design of the existing angle grinder, the distance between an air inlet and a working part is close, so that the working dust is easy to enter a motor to damage the motor.

Disclosure of Invention

Technical defect to current angle mill existence, the utility model discloses a change the cooling duct of current angle mill and arrange to solve brushless angle mill's control module cooling and the harm problem of work dust diagonal angle mill effectively.

The utility model discloses a realize through following mode: the utility model provides a direct drive type electric angle grinder, includes aircraft nose and handle casing, the aircraft nose is including the head and the brushless motor that are equipped with the abrasive disc, brushless motor sets up inside the aircraft nose, just brushless motor's main shaft is direct to be connected with the abrasive disc and is used for driving the abrasive disc and rotates handle casing in have brushless motor's drive module, its characterized in that the aircraft nose of casing be equipped with the louvre, the tail end of handle be equipped with radiator fan, handle shell is equipped with the air intake with radiator fan's fan blade department relatively, form an inside cooling air duct of organism from the air intake of handle shell tail end to the louvre of aircraft nose.

Furthermore, a heat dissipation tongue is arranged on the wall of the motor shell in the machine head, the heat dissipation tongue protrudes outwards, and after the machine head and the handle are assembled, the heat dissipation tongue is inserted into a cooling air duct inside the handle shell to form a fin type heat exchange area so as to increase the exchange area of hot air and heat dissipation fins.

Because the utility model discloses set up a cooling duct from the air intake of the tail end of handle to the louvre of aircraft nose end inside the angle mill to provide the cooling air by installing in the special radiator fan of handle tail end, not only guaranteed the cooling of setting at the control module at handle middle part, also because of increaseing the distance of air intake and operating device, this just reduces the dust that the work portion produced and gets into the inside probability of motor.

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

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic sectional view of the present invention;

FIG. 3 is a schematic structural view of a handpiece housing;

FIG. 4 is a schematic view of the bottom end of the handle housing;

fig. 5 is a schematic structural view of the handpiece housing in embodiment 2.

In the figure: 1. A machine head; 2. a handle; 3. an air inlet; 4. heat dissipation holes; 5. a motor; 6. a control module; 7. a heat radiation fan; 8. and a heat sink.

Detailed Description

Example 1: as shown in fig. 1 and 2, a direct-drive electric angle grinder comprises a machine head 1 and a handle 2, wherein the machine head 1 comprises a head provided with a grinding plate and a brushless motor 5, the brushless motor 5 is installed inside the machine head 1, and a main shaft of the brushless motor 5 is directly connected with the grinding plate to drive the grinding plate to rotate.

As shown in fig. 3, the handpiece 1 is cup-shaped, and a cylinder for mounting the stator of the motor 5 is provided inside the handpiece 1, and the stator of the brushless motor 5 is pressed into the cylinder, thereby realizing integration of the motor 5 and the handpiece 1.

A certain space is reserved between the cylinder and the shell of the machine head 1, and the shell wall of the machine head 1 is provided with heat dissipation holes 4. The heat dissipation hole 4, the cavity in the machine head 1, the cavity in the handle 2 and the air inlet 3 at the tail end of the handle 2 form a cooling air duct together.

The open end of the machine head 1 is connected with a handle 2 of the electric angle grinder, a driving module of a brushless motor 5 is arranged in a shell of the handle 2, and a control signal and a driving power supply are provided for the brushless motor 5 by the control module 6.

As shown in fig. 2 and 4, a heat dissipation fan 7 is disposed at the tail end of the handle 2, an air inlet 3 is disposed at a position of the housing of the handle 2 opposite to the fan blade of the heat dissipation fan 7, a cooling air duct inside the handle 2 is formed from the air inlet 3 at the tail end of the housing of the handle 2 to the heat dissipation hole 4 at the head 1, and the control module 6 is mounted on the cooling air duct.

When the angle grinder works, the grinding disc works, the cooling fan 7 arranged at the tail end of the handle 2 works simultaneously, and cold air is sucked from the air inlet 3 at the tail end of the handle 2. After entering the air inlet 3, the cold air flows through the general control module 6 arranged in the handle 2 and then flows out through the heat dissipation holes 4 at the handpiece 1, so that the hand control module 6 and the brushless motor 5 are cooled simultaneously.

In addition, the air inlet 3 is arranged at the tail end of the handle 2, so that the damage of the motor 5 caused by the fact that dust coming out of the grinding sheet enters a coil of the motor 5 is avoided.

Example 2: as shown in fig. 1 and 2, a direct-drive electric angle grinder comprises a machine head 1 and a handle 2, wherein the machine head 1 comprises a head provided with a grinding plate and a brushless motor 5, the brushless motor 5 is installed inside the machine head 1, and a main shaft of the brushless motor 5 is directly connected with the grinding plate to drive the grinding plate to rotate.

As shown in fig. 5, a cylinder for mounting a stator of the motor 5 is provided in the cup-shaped head 1, and the stator of the brushless motor 5 is pressed into the cylinder, thereby achieving integration of the motor 5 and the head 1.

The head 1 of the machine shell is provided with a heat dissipation hole 4. The heat dissipation hole 4, the cavity in the machine head 1, the cavity in the handle 2 and the air inlet 3 at the tail end of the handle 2 form a cooling air duct together.

The plurality of radiating fins 8 are pulled out from the outer wall of the cylinder towards the opening direction of the machine head 1 and protrude out of the opening surface of the machine head 1, and the radiating fins 8 are directly inserted into the shell of the handle 2 at the rear end, so that the radiating area of the motor 5 is increased, and the radiating effect of the motor 5 is enhanced.

The rear end of the machine head 1 is connected with a handle 2 of the electric angle grinder, a driving module of a brushless motor 5 is arranged in a shell of the handle 2, and a control signal and a driving power supply are provided for the brushless motor 5 by the control module 6.

Claims

1. The utility model provides a directly drive electronic angle mill, includes electronic angle mill's aircraft nose and handle casing, the aircraft nose is including the head and the brushless motor that are equipped with the abrasive disc, brushless motor sets up inside the aircraft nose, just brushless motor's main shaft is direct to be connected with the abrasive disc and is used for driving the abrasive disc and rotates handle casing in have brushless motor's drive module, its characterized in that the aircraft nose portion be equipped with the louvre, the tail end of handle be equipped with radiator fan, handle shell is equipped with the air intake with radiator fan's fan blade department relatively, form an inside cooling air duct of organism from the air intake of handle shell tail end to the louvre of aircraft nose portion.

2. The direct-drive electric angle grinder of claim 1, further characterized in that a heat sink is disposed on a wall of a motor housing in a head of the electric angle grinder, the heat sink protrudes outward, and after the head is assembled with the handle, the heat sink is inserted into a cooling air duct inside the handle housing to form a fin-type heat exchange area.