Electric grinding device

Abstract

The utility model relates to the technical field of polishing tools, in particular to an electric polishing device which comprises a polishing machine body, a rotating shaft, a sealing component and a butt joint component, the rotating shaft is connected with the butt joint component, and the polishing machine body is provided with a shell. The sealing part is installed in the shell and divides a cavity in the shell into a first cavity with an opening and a sealed second cavity, the second cavity is externally connected with an inflation assembly, and the second cavity is provided with an exhaust assembly. According to the utility model, gas transmission and pressurization are carried out in the space where the motor is located, so that the motor is effectively prevented from being in contact with water and dust, and the heat dissipation effect of the motor is also improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of polishing tool, specifically, relates to electric polishing device. BACKGROUND

[0002] The polishing and polishing equipment is an important electric tool, and is widely used in the fields of mechanical manufacturing, automobile maintenance, furniture manufacturing, metal processing, plastic processing, glass product and the like. The working principle is mainly that the high-speed rotation or vibration of the grinding head and the adjustment of the operation handle are used to grind and polish the surface of the workpiece. The high-speed rotation or vibration of the grinding head can remove burrs, protrusions and the like on the surface of the material, so that the surface is more flat and smooth. The operation handle can adjust the angle and direction of the grinding head, so as to process workpieces of different shapes and positions.

[0003] In the existing surface polishing and polishing processing, as shown in the disclosure No. CN217750840U, a brushless motor is arranged in the second cavity, which is a closed cavity. The motor is not easy to dissipate heat during work, and dust and water vapor are easy to enter the second cavity during long-term polishing, which has an adverse effect on the work of the motor. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing the electric polishing device to the space where the motor is located is carried out gas charging, and the water and dust are not easy to enter, and the heat dissipation effect of the motor is improved.

[0005] The utility model discloses the following technical scheme is realized: electric polishing device, including the polishing machine body, rotation axis, sealing parts and the docking part, rotation axis with the docking part is connected, the polishing machine body is provided with the shell, the sealing parts are installed in the shell and the cavity in the shell is divided into the first cavity with the opening and the second cavity that is sealed, including the second cavity is connected with the inflation assembly, and the second cavity is provided with the exhaust assembly.

[0006] Further, the inflation assembly includes a gas pipe joint, and the gas pipe joint is fixedly installed on the outside of the shell and is in communication with the second cavity.

[0007] Further, the exhaust assembly includes an exhaust hole, and the exhaust hole is arranged on the inner wall surface of the second cavity.

[0008] Further, the gas pipe joint is installed at the bottom of the second cavity, and the exhaust hole is arranged above the second cavity.

[0009] Further, the exhaust assembly further includes a silencer, and the silencer is installed at the exhaust hole.

[0010] Further, the abutting component is detachably connected with a polishing disc; the polishing disc adopts a circular truncated cone structure.

[0011] Further, a through slot and a mounting through hole through which a power supply wire passes are arranged at one end of the second cavity away from the sealing component.

[0012] The technical scheme of the utility model has at least the following advantages and beneficial effects: the utility model inflates and deflates in the second cavity where the motor is arranged, so that the pressure in the second cavity is relatively large, thereby preventing water vapor and dust from entering the second cavity, and the purpose of waterproofing and dustproofing is achieved; in addition, the flowing air current can improve the heat dissipation effect of the motor. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a structural schematic view of the electric polishing device in the utility model;

[0014] Figure 2 It is a top view of the electric polishing device in the utility model;

[0015] Figure 3 It is Figure 2 A-A cross-sectional view in the utility model.

[0016] Reference Signs: 1-polishing machine body, 11-housing, 111-first cavity, 112-second cavity, 2-inflation assembly, 21-air pipe joint, 3-exhaust assembly, 31-exhaust hole, 32-silencer, 4-sealing component, 5-abutting component, 6-polishing disc, 7-through slot, 71-mounting through hole, 8-rotating shaft. DETAILED DESCRIPTION

[0017] The following is further described in combination with specific embodiments, with reference to Figures 1-3 The embodiment is an electric polishing device, comprising a polishing machine body 1, a rotating shaft 8, a sealing component 4 and an abutting component 5, the rotating shaft 8 is connected with the abutting component 5, the polishing machine body 1 is provided with a housing 11, the sealing component 4 is installed in the housing 11 and divides the cavity in the housing 11 into a first cavity 111 with an opening and a second cavity 112 which is sealed, the second cavity 112 is connected with an inflation assembly 2, and the second cavity 112 is provided with an exhaust assembly 3; specifically, the abutting component 5 is used for polishing the surface of a workpiece by being connected with a polishing head, the rotating shaft 8 is connected with a motor in the second cavity 112 and is driven, the inflation assembly 2 injects air with a certain air pressure into the second cavity 112, so that the air pressure in the second cavity 112 is greater than that in the first cavity 111, and water vapor and dust are not easy to enter the second cavity 112 and contact the motor, therefore, the space where the motor is located has the effects of waterproofing and dustproofing; in addition, the inflation assembly 2 and the exhaust assembly 3 form an air current channel, which can take out the heat generated when the motor works, thereby achieving the effect of heat dissipation.

[0018] As Figure 3 shown, the second cavity 112 is protected, and the influence of the surface polishing treatment liquid and the residue generated by the surface polishing treatment on the brushless outer rotor motor is isolated, so that the working environment of the brushless outer rotor motor is in a dry and dust-free state; the working personnel and the brushless outer rotor motor are protected at the same time, the safety of the working personnel is improved, and the service life of the brushless outer rotor motor is prolonged.

[0019] As Figure 3 shown, the air charging assembly 2 in this embodiment includes an air pipe joint 21, which is fixedly installed on the outside of the shell 11 and connected with the second cavity 112; specifically, the air pipe joint 21 is connected with a gas supply device, such as an air compressor or a gas feeder.

[0020] Referring to Figure 3 shown, the air exhaust assembly 3 in this embodiment includes an air exhaust hole 31, which is arranged on the inner wall surface of the second cavity 112; the air pipe joint 21 is installed at the bottom of the second cavity 112, and the air exhaust hole 31 is arranged above the second cavity 112; specifically, the airflow enters from the bottom of the second cavity 112, and the air is heated and floats up to be exhausted from the air exhaust hole 31 above, so that the heat dissipation effect is better.

[0021] In order to reduce the noise in the exhaust process, the air exhaust assembly 3 in this embodiment further includes a silencer 32, which is installed at the air exhaust hole 31, so that the noise of the polishing device during the working process is relatively small.

[0022] Optionally, the polishing disc 6 is detachably connected to the connecting part 5, and the connecting part 5 is provided with a screw hole, and the tail end of the polishing disc 6 is screwed into the connecting part 5.

[0023] As Figure 1 shown, the polishing disc 6 adopts a circular truncated cone structure.

[0024] A through slot 7 and a mounting through hole 71 for a power supply line are arranged at one end of the second cavity 112 away from the sealing part 4; specifically, the power supply line is used for power supply of the motor.

[0025] The above is only a preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An electric polishing device, comprising a polishing machine body (1), a rotating shaft (8), a sealing part (4) and a docking part (5), the rotating shaft (8) being connected with the docking part (5), the polishing machine body (1) being provided with a shell (11), the sealing part (4) being installed in the shell (11) and dividing a cavity in the shell (11) into a first cavity (111) with an opening and a second cavity (112) being sealed, characterized in that: The second cavity (112) is circumscribed by an inflation assembly (2), and the second cavity (112) is provided with an exhaust assembly (3).

2. The power sander of claim 1, wherein: The inflation assembly (2) comprises a tracheal connector (21) fixedly installed outside the shell (11) and communicating with the second cavity (112).

3. The power sander of claim 2, wherein: The exhaust assembly (3) comprises an exhaust hole (31) arranged on the inner wall surface of the second cavity (112).

4. The power sander of claim 3, wherein: The tracheal connector (21) is installed at the bottom of the second cavity (112), and the exhaust hole (31) is arranged above the second cavity (112).

5. The power sander of claim 3, wherein: The exhaust assembly (3) further comprises a silencer (32) installed at the exhaust hole (31).

6. The power sander of claim 1, wherein: The docking component (5) is detachably connected with a polishing disc (6).

7. The power sander of claim 6, wherein: The polishing disc (6) adopts a circular truncated cone structure.

8. The power sander of claim 1, wherein: A through slot (7) for a power supply wire and a mounting through hole (71) are arranged at one end of the second cavity (112) away from the sealing component (4).

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