Eccentric fan structure of polishing machine

Abstract

The utility model discloses an eccentric fan structure of a polishing machine, which comprises a polishing disc, a transmission shaft synchronously rotating with the polishing disc is arranged on the polishing disc, and an eccentric component rotationally connected with the transmission shaft is arranged on the outer layer of the transmission shaft; the eccentric assembly comprises an eccentric block, a cooling fan blade and a dust collection fan blade, and the eccentric block, the cooling fan blade and the dust collection fan blade are integrally formed; the dust collection fan blades are arranged towards the grinding disc, and the cooling fan blades are arranged back to the dust collection fan blades. The eccentric block, the cooling fan blade and the dust collection fan blade are designed into the eccentric assembly of the integrally-formed structure, the overall axial length of the eccentric assembly is short, the gravity center is low, and therefore the polishing disc rotates more stably and reliably.

Description

Technical Field

[0001] The utility model belongs to the technical field of polishing machine accessories, and particularly relates to an eccentric fan structure of a polishing machine. Background Art

[0002] A polishing machine is a commonly used grinding tool and is relatively common in daily life. A self-aspirating polishing machine is disclosed in the existing patent document with the patent number CN102430981A; the existing disclosed self-aspirating polishing machine includes a machine shell, a motor is arranged inside the machine shell, the motor drives an output shaft to rotate through a speed-changing gear, and then the output shaft drives a grinding disc to rotate; the rotating shaft of the motor and the output shaft are eccentrically arranged, a dust suction fan blade and a cooling fan blade are both installed on the rotating shaft of the motor, and the speed-changing gear is arranged below the dust suction fan blade; it can be seen that the dust suction fan blade, the cooling fan blade and the speed-changing gear are arranged side by side up and down, and the three are of a split structure; due to the excessive axial length of the dust suction fan blade, the cooling fan blade and the speed-changing gear along the axis of the motor, the overall axial height of the polishing machine is relatively high; because the overall height of the polishing machine is relatively high, the center of gravity of the grinding disc is relatively high; the higher the center of gravity of the grinding disc, the more unstable the polishing machine is during operation; when using the polishing machine for grinding, the high center of gravity of the grinding disc will cause a large swing in the holding part of the polishing machine handle. Therefore, it is necessary to design an eccentric fan structure of a polishing machine to overcome the above difficulties. Summary of the Invention

[0003] Aiming at the problems existing in the prior art, the utility model designs an eccentric fan structure of a polishing machine. The utility model designs an eccentric component with an integrally formed structure of an eccentric block, a cooling fan blade and a dust suction fan blade. The overall axial length of the eccentric component is short and the center of gravity is low, so that the rotation of the grinding disc is more stable and reliable.

[0004] The invention object of the utility model is realized through the following technical solutions: an eccentric fan structure of a polishing machine, including a grinding disc, a transmission shaft synchronously rotating with the grinding disc is arranged on the grinding disc, and an eccentric component rotatably connected with the transmission shaft is arranged outside the transmission shaft; the eccentric component includes an eccentric block, a cooling fan blade and a dust suction fan blade, and the eccentric block, the cooling fan blade and the dust suction fan blade are integrally formed; the dust suction fan blade faces the grinding disc, and the cooling fan blade faces away from the dust suction fan blade.

[0005] Preferably, the inside of the eccentric block is hollow, and a plurality of first bearings connecting the two are arranged between the eccentric block and the transmission shaft; a first step is arranged on the outer wall of the transmission shaft, and a second step is arranged inside the eccentric block; the lower first bearing abuts against the first step, and the upper first bearing abuts against the second step; the two first bearings are arranged side by side up and down.

[0006] By arranging the first step and the second step, axial limit of the first bearing is achieved, and relative movement of the first bearing relative to the eccentric block is avoided.

[0007] Preferably, an annular clamping groove is provided inside the eccentric block, and a snap ring is provided in the annular clamping groove; when the lower first bearing abuts against the first step, the snap ring abuts against the lower first bearing. By providing a snap ring in the annular clamping groove, the first bearing is limited, preventing the first bearing from disengaging from the inside of the eccentric block.

[0008] Preferably, a first clamping groove is further provided on the outer layer of the transmission shaft, and a first retaining ring is provided in the first clamping groove; when the upper first bearing abuts against the second step, the first retaining ring abuts against the upper first bearing. Through the mutual cooperation of the first retaining ring and the second step, the transmission shaft is axially limited, preventing the transmission shaft from axially moving relative to the first bearing.

[0009] Preferably, the central axis of the eccentric block and the transmission shaft are eccentrically arranged; an installation disk integrally formed with the eccentric block is provided on the outside of the eccentric block, a cooling air blade is provided on the upper end surface of the installation disk, and a dust suction air blade is provided on the lower end surface of the installation disk.

[0010] An installation disk is provided on the outer layer of the eccentric block, which facilitates the setting of the cooling air blade and the dust suction air blade on the installation disk; since the cooling air blade, the dust suction air blade and the eccentric block are integrally formed, the assembly error between parts is reduced; at the same time, the axial length of the eccentric assembly composed of the cooling air blade, the dust suction air blade and the eccentric block is shorter, and the center of gravity is lower, increasing the stability of the grinding disk during operation; secondly, the eccentric assembly is integrally processed, and the overall dimensional error is small, increasing the manufacturing accuracy.

[0011] Preferably, the cooling air blades are distributed in a circumferential array on the edge of the installation disk; an arc-shaped retaining strip is provided on the edge of the lower end surface of the installation disk, and the arc-shaped retaining strip is adjacent to the dust suction air blade.

[0012] Preferably, a columnar protrusion is provided on the top of the eccentric block, and a second bearing connecting the main body of the polishing machine is provided on the outer layer of the columnar protrusion. By providing the columnar protrusion, it is convenient to install the second bearing. The second bearing is installed in the main body of the polishing machine, which is not shown in the drawing of the main body of the polishing machine. The columnar protrusion is connected to the rotating shaft of the motor, so that the eccentric assembly can be driven to rotate when the motor rotates.

[0013] Preferably, a waist-shaped protrusion is provided at the end of the transmission shaft, and a waist-shaped groove is provided on the grinding disk; the waist-shaped protrusion is arranged in the waist-shaped groove, and the outer contour of the waist-shaped protrusion and the waist-shaped groove match each other; a fastener for fixing the two is provided between the transmission shaft and the grinding disk. Through the mutual cooperation of the waist-shaped protrusion and the waist-shaped groove, the transmission shaft can reliably drive the grinding disk to rotate.

[0014] Preferably, the cooling air blade and the dust suction air blade are coaxially arranged, and the axial length of the cooling air blade and the dust suction air blade is less than the axial length of the eccentric block.

[0015] Compared with the prior art, the utility model has the following beneficial effects: 1. The utility model integrally forms an eccentric block, a cooling fan blade and a dust suction fan blade into an eccentric assembly, thereby shortening the axial length of the polishing machine along the motor, reducing the overall height of the polishing machine, lowering the overall center of gravity of the polishing machine and making it more stable and reliable during operation. 2. The eccentric block, the cooling fan blade and the dust suction fan blade are integrally formed, reducing the assembly error between components. The assembly accuracy is higher. 3. The eccentric block, the cooling fan blade and the dust suction fan blade are integrally formed, reducing the error of the overall size of the eccentric assembly and increasing the manufacturing accuracy of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a perspective view of the utility model;

[0017] Figure 2 is an internal structure diagram of the utility model;

[0018] Figure 3 is an exploded view of the utility model;

[0019] Figure 4 is an internal structure diagram of the eccentric assembly;

[0020] Figure 5 is a perspective view of the eccentric assembly;

[0021] Reference numerals in the drawings: 1, grinding disc; 2, transmission shaft; 3, eccentric assembly; 31, eccentric block; 32, cooling fan blade; 33, dust suction fan blade; 34, mounting disc; 35, arc-shaped bar; 36, columnar protrusion; 4, first bearing; 5, first step; 6, second step; 7, annular clamping groove; 8, circlip; 9, first clamping groove; 10, first retaining ring; 11, second bearing; 12, kidney-shaped protrusion; 13, kidney-shaped groove; 14, fastener. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following further describes the utility model in conjunction with the embodiments shown in the drawings:

[0023] As Figures 1 to 5 shown, this embodiment discloses a polishing machine eccentric fan structure, including a grinding disc 1, a transmission shaft 2 synchronously rotating with the grinding disc 1 is provided on the grinding disc 1, and an eccentric assembly 3 rotatably connected to the outer layer of the transmission shaft 2; the eccentric assembly 3 includes an eccentric block 31, a cooling fan blade 32 and a dust suction fan blade 33, and the eccentric block 31, the cooling fan blade 32 and the dust suction fan blade 33 are integrally formed; the dust suction fan blade 33 is arranged facing the grinding disc 1, and the cooling fan blade 32 is arranged back to the dust suction fan blade 33.

[0024] The inside of the eccentric block 31 is hollow, and a plurality of first bearings 4 connecting the two are provided between the eccentric block 31 and the transmission shaft 2; a first step 5 is provided on the outer wall of the transmission shaft 2, and a second step 6 is provided inside the eccentric block 31; the lower first bearing 4 abuts against the first step 5, and the upper first bearing 4 abuts against the second step 6; the two first bearings 4 are arranged side by side vertically. An annular clamping groove 7 is provided inside the eccentric block 31, and a snap ring 8 is provided in the annular clamping groove 7; when the lower first bearing 4 abuts against the first step 5, the snap ring 8 abuts against the lower first bearing 4. A first clamping groove 9 is further provided on the outer layer of the transmission shaft 2, and a first retaining ring 10 is provided in the first clamping groove 9; when the upper first bearing 4 abuts against the second step 6, the first retaining ring 10 abuts against the upper first bearing 4.

[0025] The central axis of the eccentric block 31 and the transmission shaft 2 are eccentrically arranged; an installation disc 34 integrally formed with the eccentric block 31 is provided on the outside of the eccentric block 31, a cooling air blade 32 is provided on the upper end surface of the installation disc 34, and a dust suction air blade 33 is provided on the lower end surface of the installation disc 34. The cooling air blades 32 are distributed in a circumferential array at the edge of the installation disc 34; an arc-shaped retaining strip 35 is provided at the edge of the lower end surface of the installation disc 34, and the arc-shaped retaining strip 35 is adjacent to the dust suction air blade 33. A columnar protrusion 36 is provided at the top of the eccentric block 31, and a second bearing 11 connecting the polishing machine main body is provided on the outer layer of the columnar protrusion 36.

[0026] A kidney-shaped protrusion 12 is provided at the end of the transmission shaft 2, and a kidney-shaped groove 13 is provided on the grinding disc 1; the kidney-shaped protrusion 12 is arranged in the kidney-shaped groove 13, and the outer contour of the kidney-shaped protrusion 12 and the kidney-shaped groove 13 match each other; a fastener 14 for fixing the two is provided between the transmission shaft 2 and the grinding disc 1. The cooling air blade 32 and the dust suction air blade 33 are coaxially arranged, and the axial lengths of the cooling air blade 32 and the dust suction air blade 33 are smaller than the axial length of the eccentric block 31.

[0027] The specific operation process of this embodiment is as follows. First, install the first retaining ring 10 on the first card slot 9 of the transmission shaft 2, and then install the transmission shaft 2 into the inside of the eccentric block 31 through the first bearing 4. Then, install the snap ring 8 in the annular card slot 7 to prevent the first bearing 4 from falling off. Then, align the kidney-shaped groove 13 of the grinding disc 1 and the kidney-shaped protrusion 12 of the transmission shaft 2 and fix the grinding disc 1 and the transmission shaft 2 through the fastener 14. Finally, thread-connect the eccentric assembly 3 and the rotating shaft of the motor, and then install the eccentric assembly 3 into the polishing machine main body through the second bearing 11. The polishing machine main body and the motor are not shown in the drawings. When the rotating shaft of the motor works, the eccentric assembly 3 rotates synchronously. When the eccentric assembly 3 rotates, the cooling fan blade 32 and the dust suction fan blade 33 rotate synchronously. The motor can be continuously cooled through the cooling fan blade 32, and the impurities on the grinding disc 1 can be sucked through the dust suction fan blade 33. Since the eccentric block 31, the cooling fan blade 32, and the dust suction fan blade 33 are integrally formed into the eccentric assembly 3, the axial length of the polishing machine main body along the motor is shortened, the height of the polishing machine main body is reduced, the center of gravity of the polishing machine main body is low, and it is more stable and reliable during operation.

[0028] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways to substitute, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An eccentric fan structure of a polishing machine, comprising a polishing disc (1), on which a transmission shaft (2) rotating synchronously with the polishing disc (1) is provided, characterized in that: The outer layer of the transmission shaft (2) is provided with an eccentric assembly (3) rotatably connected thereto; the eccentric assembly (3) comprises an eccentric block (31), a cooling fan blade (32) and a dust suction fan blade (33); the eccentric block (31), the cooling fan blade (32) and the dust suction fan blade (33) are integrally formed; the dust suction fan blade (33) is arranged toward the grinding disc (1), and the cooling fan blade (32) is arranged away from the dust suction fan blade (33).

2. The eccentric fan structure of the polishing machine according to claim 1, characterized in that: The eccentric block (31) is hollow inside, and a plurality of first bearings (4) are provided between the eccentric block (31) and the transmission shaft (2) to connect the two. A first step (5) is provided on the outer wall of the transmission shaft (2), and a second step (6) is provided inside the eccentric block (31). The lower first bearing (4) abuts against the first step (5), and the upper first bearing (4) abuts against the second step (6); and the two first bearings (4) are arranged side by side up and down.

3. The eccentric fan structure of the polishing machine according to claim 2, characterized in that: An annular groove (7) is provided inside the eccentric block (31), and a retaining spring (8) is provided inside the annular groove (7); when the first bearing (4) below abuts against the first step (5), the retaining spring (8) abuts against the first bearing (4) below.

4. The eccentric fan structure of the polishing machine according to claim 2, characterized in that: The outer layer of the transmission shaft (2) is further provided with a first retaining groove (9), and a first retaining ring (10) is provided in the first retaining groove (9); when the upper first bearing (4) abuts against the second step (6), the first retaining ring (10) abuts against the upper first bearing (4).

5. The eccentric fan structure of the polishing machine according to claim 1, characterized in that: The central axis of the eccentric block (31) and the transmission shaft (2) are eccentrically arranged; a mounting plate (34) formed integrally therewith is provided on the outer side of the eccentric block (31); a cooling fan blade (32) is provided on the upper end surface of the mounting plate (34); and a dust suction fan blade (33) is provided on the lower end surface of the mounting plate (34).

6. The eccentric fan structure of the polishing machine according to claim 5, characterized in that: The cooling blades (32) are distributed in a circular array on the edge of the mounting plate (34); an arc-shaped retaining strip (35) is provided on the edge of the lower end surface of the mounting plate (34); the arc-shaped retaining strip (35) and the dust collecting blades (33) are arranged adjacent to each other.

7. The eccentric fan structure of the polishing machine according to claim 1, characterized in that: A columnar protrusion (36) is provided on the top of the eccentric block (31), and a second bearing (11) connected to a polishing machine body is provided on the outer layer of the columnar protrusion (36).

8. The eccentric fan structure of the polishing machine according to claim 1, characterized in that: A waist-shaped protrusion (12) is provided at the end of the transmission shaft (2), and a waist-shaped groove (13) is provided on the grinding disc (1); the waist-shaped protrusion (12) is arranged in the waist-shaped groove (13), and the outer contours of the waist-shaped protrusion (12) and the waist-shaped groove (13) match each other; and a fastener (14) is provided between the transmission shaft (2) and the grinding disc (1) for fixing the two.

9. The eccentric fan structure of a polishing machine according to claim 1, characterized in that: The cooling fan blade (32) and the dust suction fan blade (33) are coaxially arranged, and the axial lengths of the cooling fan blade (32) and the dust suction fan blade (33) are smaller than the axial length of the eccentric block (31).

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