Electric polishing machine

Abstract

The present application discloses an electric polishing machine, including a housing, a motor, an eccentric device and a polishing disc, wherein the motor is installed in the housing, the eccentric device is fixedly connected to the rotating shaft of the motor, the eccentric device is provided with an eccentric structure different from the axis of the rotating shaft, and the polishing disc is coaxially connected to the eccentric structure. The eccentric structure on the eccentric device of the present application is different from the axis of the motor rotating shaft, while the axis of the polishing disc is the same as the eccentric structure, so that the axis of the motor rotating shaft is different from the axis of the polishing disc. When the motor rotating shaft on the housing drives the eccentric device to rotate, the eccentric device drives the polishing disc to rotate and causes the polishing disc to shake, so that the concentric lines generated when the polishing disc rotates and polishes are covered by the shaking of the polishing disc, thereby avoiding the generation of concentric lines during grinding and polishing.

Description

Technical Field

[0001] The embodiment of the utility model relates to the technical field of electric tools, and in particular to an electric polishing machine. Background Art

[0002] An electric polisher is an electric tool used to polish the surface of an object. It uses various driving mechanisms to make the grinding disc rotate continuously and quickly, and then applies pressure to the workpiece by hand to polish it on the rotating polisher, thereby polishing the workpiece surface and reducing the surface roughness of the workpiece to obtain a bright and smooth surface. Compared with pneumatic polishers, the speed of an electric polisher will be constant when rotating, and there will be no situation where the air pressure is low and the speed is slow.

[0003] However, when the grinding disc of the current electric polishing machine is running at high speed, the cutting force on the grinding disc will increase with the increase of radius, resulting in inconsistent cutting force of the polishing disc on the workpiece, making it very easy to produce concentric lines on the workpiece after polishing, affecting the polishing effect. Utility Model Content

[0004] The embodiment of the utility model provides an electric polishing machine, which is used to solve the technical problem that the current electric polishing machine generates concentric lines on the workpiece when polishing the workpiece.

[0005] To achieve the above-mentioned purpose, an embodiment of the utility model provides an electric polishing machine, including a shell, a motor, an eccentric device and a polishing disk, the motor is installed in the shell, the eccentric device is fixedly connected to the rotating shaft of the motor, the eccentric device is provided with an eccentric structure different from the axis of the rotating shaft, and the polishing disk is coaxially connected to the eccentric structure.

[0006] Preferably, the eccentric structure is a cylindrical hole, and a cylinder connected to the cylindrical hole is provided at the axis of the polishing disc, and the cylinder is coaxially inserted into the cylindrical hole.

[0007] Preferably, the eccentric device further comprises a counterweight block, the center of gravity of the counterweight block is not located on the axis of the rotating shaft, and the eccentric structure is a cylindrical hole opened on the counterweight block.

[0008] Preferably, it further comprises a bearing, wherein the bearing is arranged in the cylindrical hole, the outer ring of the bearing is fixedly connected to the eccentric structure, and the inner ring of the bearing is fixedly connected to the cylinder.

[0009] Preferably, it also includes a connecting shaft, on which a threaded hole matching the cylinder is provided, the connecting shaft is fixedly connected to the inner ring of the bearing, and the polishing disc is threadedly connected to the connecting shaft.

[0010] Preferably, when the outer ring of the bearing rotates, the inner ring of the bearing will rotate along with it due to the damping between the bearings.

[0011] Preferably, the eccentric device and the rotating shaft of the motor are integrally formed.

[0012] Preferably, a sealing ring is provided between the polishing disc and the housing, and / or a cooling fan is provided on the rotating shaft of the motor, and the cooling fan is used to dissipate heat for the motor.

[0013] Preferably, the housing comprises a cylindrical first cavity for accommodating the motor, and a trumpet-shaped second cavity for accommodating the eccentric device, the first cavity is coaxial with the motor, and the side of the motor is fixedly connected to the inner side of the housing.

[0014] Preferably, a fixing plate is further provided at one end of the shell away from the polishing disc, and the shell is connected to the fixing plate by bolts.

[0015] The embodiments of the utility model have the following beneficial effects: the eccentric structure on the eccentric device is different from the axis of the motor shaft, while the axis of the polishing disk is the same as the eccentric structure, so that the axis of the motor shaft is different from the axis of the polishing disk; when the motor shaft on the shell drives the eccentric device to rotate, the eccentric device drives the polishing disk to rotate and causes the polishing disk to shake, so that the concentric lines generated when the polishing disk rotates and polishes are covered by the shaking of the polishing disk, thereby avoiding the generation of concentric lines during grinding and polishing.

[0016] In addition to the above-described purposes, features and advantages, the embodiments of the present utility model have other purposes, features and advantages. The embodiments of the present utility model will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of this application are used to provide a further understanding of the embodiments of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 It is a three-dimensional structural schematic diagram of the electric polishing machine of the utility model;

[0019] Figure 2 It is an exploded view of the electric polishing machine of the utility model;

[0020] Figure 3 It is a side projection view of the electric polishing machine of the utility model;

[0021] Figure 4 yes Figure 3 AA section view;

[0022] Figure 5 It is a structural schematic diagram of the motor shaft of the electric polishing machine of the utility model;

[0023] Figure 6 It is a structural schematic diagram of the housing of the electric polishing machine of the utility model.

[0024] The reference numerals are as follows:

[0025] 1. Shell; 11. First cavity; 12. Second cavity; 2. Motor; 21. Eccentric device; 211. Eccentric structure; 212. Counterweight; 22. Rotating shaft; 3. Polishing disc; 31. Cylinder; 4. Bearing; 5. Connecting shaft; 6. Sealing ring; 7. Cooling fan; 8. Fixing plate; 9. Bolt. DETAILED DESCRIPTION

[0026] The following is a further detailed description of the technical solution of the utility model embodiment in conjunction with the accompanying drawings and specific embodiments of the specification. In addition, unless otherwise defined, the technical terms or scientific terms used in the description of this application should be the usual meanings understood by the general technicians in the field to which this application belongs. The words "upper", "lower", "left", "right", "center", "vertical", "horizontal", "inside", "outside" and other words indicating orientation used in the description of this application are only used to indicate the relative direction or positional relationship, and do not imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. When the absolute position of the described object changes, its relative positional relationship may also change accordingly, so it cannot be understood as a limitation to this application. The "first", "second", "third" and similar terms used in the description of this application are only used for descriptive purposes to distinguish different components, and cannot be understood as indicating or implying relative importance. The similar words "one", "one" or "the" used in the description of this application should not be understood as an absolute limitation on quantity, but should be understood as the existence of at least one. The words “include” or “comprising” and the like used in the description of this application mean that the elements or objects preceding the words include the elements or objects listed after the words and their equivalents, but do not exclude other elements or objects.

[0027] It should also be noted that, unless otherwise clearly specified and limited, the words "installed", "connected", "connected" and similar terms used in the description of this application should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. Technical personnel in the field can understand their specific meanings in this application according to the specific circumstances.

[0028] like Figures 1 to 4As shown, the electric polishing machine of this embodiment includes a housing 1, a motor 2, an eccentric device 21 and a polishing disk 3. The motor 2 is installed in the housing 1, the eccentric device 21 is fixedly connected to the rotating shaft 22 of the motor 2, the eccentric device 21 is provided with an eccentric structure 211 which is different from the axis of the rotating shaft 22, and the polishing disk 3 is coaxially connected to the eccentric structure 211.

[0029] The eccentric structure 211 on the eccentric device 21 is different from the axis of the rotating shaft 22 of the motor 2, while the axis of the polishing disk 3 is the same as the eccentric structure 211. Therefore, the axis of the rotating shaft 22 of the motor 2 is different from the axis of the polishing disk 3. There is an eccentric distance between the rotating shaft 22 and the polishing disk 3. When the rotating shaft 22 of the motor 2 on the shell 1 drives the eccentric device 21 to rotate, the eccentric device 21 drives the polishing disk 3 to rotate and causes the polishing disk 3 to shake, so that the concentric lines generated when the polishing disk 3 rotates and polishes are covered by the shaking of the polishing disk 3, thereby avoiding the generation of concentric lines during grinding and polishing.

[0030] Optional, such as Figure 5 As shown, the eccentric device 21 includes a counterweight block 212 , and the center of gravity of the counterweight block 212 is not located on the axis of the rotating shaft 22 .

[0031] Specifically, the eccentric device 21 and the rotating shaft 22 of the motor 2 are integrally formed, so that the counterweight block 212 and the rotating shaft 22 of the motor 2 constitute an eccentric shaft. When the motor 2 is started, the rotating shaft 22 and the counterweight block 212 rotate together, and the counterweight block 212 can provide centrifugal force for the rotating shaft, thereby increasing the torque of the rotating shaft 22.

[0032] Optionally, the eccentric structure 211 is a cylindrical hole, which is provided on the counterweight block 212 , and a cylindrical body 31 connected to the cylindrical hole is provided at the axis of the polishing disc 3 , and the cylindrical body 31 is coaxially inserted into the cylindrical hole.

[0033] The axis of the cylindrical hole is coaxial with the cylinder 31, and the cylinder 31 is coaxial with the polishing disk 3, but the cylindrical hole is different from the axis of the rotating shaft 22, that is, it is not coaxial with the rotating shaft 22 and the polishing disk 3, and there is an axial center distance between the two, so that when the rotating shaft 22 rotates, the polishing disk 3 will shake while rotating. In other embodiments, the eccentric structure 211 can also be a cylinder, and a coaxial cylindrical hole is provided at the axis center of the polishing disk 3. The eccentric structure is inserted into the cylindrical hole of the polishing disk 3 so that the polishing disk 3 is connected to the eccentric structure.

[0034] Optionally, the electric polishing machine further includes a bearing 4 , which is disposed in the cylindrical hole, wherein the outer ring of the bearing 4 is fixedly connected to the eccentric structure 211 , and the inner ring of the bearing 4 is fixedly connected to the cylinder 31 .

[0035] The bearing 4 is arranged in the cylindrical hole of the eccentric structure 211. The axis of the bearing 4 is consistent with the cylindrical hole and there is an axial center distance between the axis of the rotating shaft 22. The cylinder 31 is fixedly connected to the inner ring of the bearing 4. When the outer ring of the bearing 4 is driven by the rotating shaft 22 to rotate eccentrically, the bearing 4 and the polishing disk 3 revolve along the rotating shaft 22, so that the inner ring of the bearing 4 rotates due to the centrifugal force. Therefore, the bearing 4 and the polishing disk 3 rotate while revolving along the rotating shaft 22. The high-speed rotation and revolution of the polishing disk 3 make the revolution of the polishing disk 3 form a shaking effect. The shaking of the polishing disk 3 can effectively eliminate the concentric lines generated when the polishing disk 3 is polished.

[0036] Specifically, the bearing 4 is a large damping bearing. When the outer ring of the bearing 4 rotates, the inner ring of the bearing 4 will rotate along due to the damping between the bearings, so that the inner ring of the bearing 4 is simultaneously affected by centrifugal force and resistance, increasing the torque of the inner ring of the bearing 4.

[0037] Optionally, the electric polishing machine further comprises a connecting shaft 5 , on which a threaded hole matching the cylinder 31 is provided, the connecting shaft 5 is fixedly connected to the inner ring of the bearing 4 , and the polishing disc 3 is threadedly connected to the connecting shaft 5 .

[0038] The cylindrical body 31 of the polishing disc 3 is provided with an external thread, and the cylindrical body 31 is threadedly connected to the connecting shaft 5, and then the connecting shaft 5 is connected to the inner ring of the bearing 4, so as to facilitate the disassembly and assembly of the polishing disc 3.

[0039] In some embodiments, Figure 6 As shown, the housing 1 includes a cylindrical first cavity 11 for accommodating the motor 2 and a trumpet-shaped second cavity 12 for accommodating the eccentric device 21 . The first cavity 11 is coaxial with the motor 2 , and the side of the motor 2 is fixedly connected to the inner side of the housing 1 .

[0040] The motor 2 is coaxial with the first cavity 11 and is fixedly connected to the inner side of the shell 1 through the side of the motor 2, thereby ensuring that the center of gravity of the motor 2 is located in the center of the shell 1 and maintaining the stability of the motor 2. The trumpet-shaped second cavity 12 can use a polishing disk 3 with a larger area at the end and can adapt to polishing disks 3 of different diameters.

[0041] In some embodiments, a sealing ring 6 is provided between the polishing disc 3 and the housing 1 , and / or a cooling fan 7 is provided on the rotating shaft 22 of the motor 2 , and the cooling fan 7 is used to dissipate heat for the motor 2 .

[0042] In order to prevent the polishing liquid from entering the second cavity 12 during the polishing process, a sealing ring 6 is provided between the polishing disk 3 and the shell 1. The sealing ring 6 is located at the edge of the second cavity 12 and the polishing disk 3. The top of the sealing ring 6 abuts the shell 1. There is a certain gap between the bottom of the sealing ring 6 and the polishing disk 3 to avoid affecting the rotation of the polishing disk 3. The cooling fan 7 is fixed on the rotating shaft 22 of the motor 2 and can rotate with the rotation 22 of the motor 2. In order to save space in the second cavity 12, the cooling fan 7 is provided with a groove for accommodating the counterweight 212. The cooling fan 7 and the counterweight 212 rotate synchronously. In order to enable the cooling fan 7 to dissipate heat for the stator of the motor 2, a through hole for air to pass is opened on the connecting structure between the motor 2 and the shell 1.

[0043] Optionally, a fixing plate 8 is further provided at one end of the shell 1 away from the polishing disc 3. The shell 1 is connected to the fixing plate 8 via bolts 9. The fixing plate 8 is used to strengthen the strength of the shell 1 and facilitate the connection of the electric polishing machine with other tools.

[0044] The electric polishing machine provided in the above-mentioned embodiment of the present application forms an eccentric shaft through the counterweight block 212 and the rotating shaft 22 of the motor 2, which provides centrifugal force for the rotating shaft 22 when the rotating shaft 22 rotates, thereby enhancing the torque of the rotating shaft 22. At the same time, the axial center distance between the axis of the polishing disk 3 and the axis of the rotating shaft 22 of the motor 2 causes the polishing disk 3 to shake while rotating. The shaking of the polishing disk 3 eliminates the concentric lines caused by the rotation of the polishing disk 3.

[0045] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An electric polishing machine, characterized in that: The invention comprises a housing (1), a motor (2), an eccentric device (21) and a polishing disc (3); the motor (2) is installed in the housing (1); the eccentric device (21) is fixedly connected to a rotating shaft (22) of the motor (2); an eccentric structure (211) having an axis different from that of the rotating shaft (22) is provided on the eccentric device (21); and the polishing disc (3) is coaxially connected to the eccentric structure (211).

2. An electric polishing machine according to claim 1, characterized in that: The eccentric structure (211) is a cylindrical hole, and a cylindrical body (31) connected to the cylindrical hole is provided at the axis of the polishing disc (3), and the cylindrical body (31) is coaxially inserted into the cylindrical hole.

3. An electric polishing machine according to claim 2, characterized in that: The eccentric device (21) further comprises a counterweight block (212), the center of gravity of the counterweight block (212) is not located on the axis of the rotating shaft (22), and the eccentric structure (211) is a cylindrical hole opened on the counterweight block (212).

4. An electric polishing machine according to claim 2, characterized in that: It also includes a bearing (4), wherein the bearing (4) is arranged in the cylindrical hole, the outer ring of the bearing (4) is fixedly connected to the eccentric structure (211), and the inner ring of the bearing (4) is fixedly connected to the cylinder (31).

5. An electric polishing machine according to claim 4, characterized in that: It also comprises a connecting shaft (5), on which a threaded hole matching the cylinder (31) is provided, the connecting shaft (5) is fixedly connected to the inner ring of the bearing (4), and the polishing disc (3) is threadedly connected to the connecting shaft (5).

6. An electric polishing machine according to claim 4, characterized in that: When the outer ring of the bearing (4) rotates, the inner ring of the bearing (4) will rotate along with it due to the damping effect between the bearings.

7. An electric polishing machine according to claim 1, characterized in that: The eccentric device (21) and the rotating shaft (22) of the motor (2) are integrally formed.

8. An electric polishing machine according to claim 1, characterized in that: A sealing ring (6) is provided between the polishing disc (3) and the housing (1), and / or a cooling fan (7) is provided on the rotating shaft (22) of the motor (2), and the cooling fan (7) is used to dissipate heat for the motor (2).

9. An electric polishing machine according to claim 1, characterized in that: The housing (1) comprises a cylindrical first cavity (11) for accommodating the motor (2), and a trumpet-shaped second cavity (12) for accommodating the eccentric device (21); the first cavity (11) is coaxial with the motor (2), and the side of the motor (2) is fixedly connected to the inner side of the housing (1).

10. The electric polishing machine according to claim 1, characterized in that: A fixing plate (8) is also provided at one end of the housing (1) away from the polishing disc (3), and the housing (1) is connected to the fixing plate (8) via bolts (9).

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