Eccentric disc

Abstract

The utility model provides an eccentric disc, and belongs to the technical field of polishing equipment. Comprising a polishing disc, a base, an eccentric shaft fixedly arranged on the polishing disc and a main shaft rotationally connected to the base, the side, away from the polishing disc, of the eccentric shaft is arranged in the main shaft in a penetrating mode, the main shaft can drive the eccentric shaft to rotate, and the axis of the main shaft and the axis of the eccentric shaft are staggered; the eccentric shaft is sequentially sleeved with an eccentric bearing cover, a plurality of single-cover type deep groove ball bearings and an inner core ring from top to bottom in height, the side, away from the polishing disc, of the inner core ring is fixed to the eccentric shaft through a bolt, and a plane bearing and a polyurethane film are arranged below the inner core ring. According to the utility model, the structure of the eccentric shaft is changed, so that the problem that the eccentric shaft cannot rotate due to insufficient torsion caused by overlarge pressure is solved, the service life of the eccentric disc is prolonged, the frequency of replacing accessories is reduced, the manual maintenance cost is reduced, and the polishing efficiency is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of polishing equipment, and in particular relates to an eccentric disc. Background Art

[0002] In the related technology, during the process of polishing the target object, a certain pressure is generated due to the contact between the workpiece and the polishing disc of the eccentric disk. When the pressure is too large, the torque of the eccentric shaft is insufficient, causing the eccentric disk to be unable to rotate. Because there is a gap between the bottom end of the eccentric shaft and the bottom of the eccentric hole of the main shaft, the eccentric shaft is suspended in the air, and the pressure points are all concentrated on the bearings, which can easily cause excessive wear of the bearings, resulting in frequent replacement of the bearings, reducing the service life of the bearings, and increasing labor maintenance costs.

[0003] In view of this, this application is proposed. Utility Model Content

[0004] In order to improve the problem of short service life of the eccentric disk, the present application provides an eccentric polishing head.

[0005] The eccentric disc provided in this application adopts the following technical solution:

[0006] An eccentric disk comprises a throwing disk, a base, an eccentric shaft fixed to the throwing disk, and a main shaft rotatably connected to the base, wherein the side of the eccentric shaft away from the throwing disk is inserted into the main shaft, the main shaft can drive the eccentric shaft to rotate, and the axis line of the main shaft is misaligned with the axis line of the eccentric shaft; an air-sealing plate pressure ring is arranged at one end of the base facing the throwing disk, a waterproof outer ring is arranged at the center of the air-sealing plate pressure ring, the air-sealing plate pressure ring and the waterproof outer ring are both sleeved on the main shaft, and the air-sealing plate pressure ring A stepped positioning groove is provided on the side facing the throwing disc, which are a first positioning groove and a second positioning groove respectively; a first annular plate is provided on the side facing the base of the air-sealing plate pressure ring; the waterproof outer ring is installed in the first positioning groove of the air-sealing plate pressure ring and cooperates with the air-sealing plate pressure ring to form an air-sealing gap; a middle-layer waterproof cover is installed in the second positioning groove of the air-sealing plate pressure ring; a water storage tank is provided on the side facing the throwing disc of the middle-layer waterproof cover, and the height of the side wall of the water storage tank away from the axis is greater than the height of the side wall close to the axis.

[0007] Preferably, an oil nozzle is provided on the outer wall of the base, and the oil nozzle is connected to the interior of the base.

[0008] Preferably, the eccentric shaft is provided with an eccentric bearing cover, a plurality of single-cover deep groove ball bearings and an inner core ring in sequence from top to bottom in height. The inner core ring is fixed to the eccentric shaft by bolts on the side away from the throwing disk, and a plane bearing and a high-strength film are provided below the inner core ring.

[0009] Preferably, the plane bearing is composed of an upper plane washer, a plane retainer assembly with steel balls and a lower plane washer, and the plane bearing is placed at the bottom of the eccentric hole of the main shaft; a high-strength rubber film is arranged below the plane bearing.

[0010] Preferably, the outer side wall of the eccentric bearing cover is fixed to the inner side wall of the eccentric hole, and the eccentric shaft passes through the eccentric bearing cover.

[0011] Preferably, a skeleton oil seal is provided between the eccentric bearing cover and the eccentric shaft, and an outer wall of the skeleton oil seal is fixed to the eccentric bearing cover and the side wall of the eccentric shaft.

[0012] Preferably, an outer wall of the base is provided with an oil nozzle, the oil nozzle is communicated with the interior of the base, and lubrication is provided to the main shaft through the oil nozzle.

[0013] Preferably, the main shaft includes an integrally formed eccentric portion, a first mounting portion and a second mounting portion, the eccentric portion is provided with an eccentric hole along the axial direction, the eccentric shaft is passed through the eccentric hole, the mounting portion is provided with a mounting hole along the axial direction for mounting the driving end of the driving member, and the axial centerline of the eccentric hole is offset from the axial centerline of the mounting hole.

[0014] Preferably, a deep groove ball bearing is sleeved on the first mounting position of the main shaft, and the end of the deep groove ball bearing close to the base is affixed to the boss of the first mounting part, and the end close to the throwing plate is affixed to the first annular plate of the air seal plate pressure ring; in this way, a deep groove ball bearing is sleeved on the second mounting position, and the deep groove ball bearing on the second mounting position is affixed to the boss of the second mounting position.

[0015] Preferably, a counterweight is provided at one end of the main shaft facing the throwing disc.

[0016] Preferably, an O-ring is sleeved on one end of the base away from the casting disc, and the O-ring is used for sealing the eccentric disc.

[0017] In summary, the technical solution adopted in this application can achieve the following beneficial effects:

[0018] By arranging a plane bearing under the eccentric shaft, the plane bearing can obtain high axial load and high rigidity in a very small space, thereby changing the structure of the eccentric shaft, and transferring the pressure generated by the contact between the polishing disc and the workpiece from the original deep groove ball bearing to the plane bearing, thus avoiding the problem of insufficient torque of the eccentric shaft causing it to be unable to rotate due to excessive pressure, increasing the service life of the eccentric disc, reducing the frequency of replacing accessories, reducing labor maintenance costs, and thereby improving polishing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments of the utility model or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0021] Figure 2 yes Figure 1 Sectional view in the AA direction;

[0022] Figure 3 yes Figure 2 A magnified view of part I;

[0023] Figure 4 It is an exploded diagram of the overall structure of the embodiment of the present application;

[0024] Figure 5 It is a schematic diagram of the overall structure of the eccentric small shaft of an embodiment of the present application.

[0025] In the figure: 1. throwing disc; 2. base; 3. eccentric shaft; 4. main shaft; 41. eccentric part; 411. eccentric hole; 421. first installation position; 422. second installation position; 43. installation hole; 5. air seal plate pressure ring; 51. first positioning groove; 52. second positioning groove; 53. air seal gap; 54. first annular plate; 6. middle waterproof cover; 61. water storage tank; 7. waterproof outer ring; 8. eccentric bearing cover; 9. skeleton oil seal; 10. air nozzle; 11. counterweight; 12. excellent rubber film; 13. deep groove ball bearing; 14. single cover deep groove ball bearing; 15. O-ring; 16. oil nozzle; 17. inner core ring; 18. plane bearing; 181. upper plane washer; 182. plane retainer assembly with steel ball; 183. lower plane washer. DETAILED DESCRIPTION

[0026] The following description provides many different embodiments or examples for implementing different features of the present invention. The components and arrangements described in the following specific examples are only used to simplify the present invention and are only used as examples, not to limit the present invention.

[0027] In the description of the present utility model, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features.

[0028] The following is combined with Figure 1-5 This application is described in further detail.

[0029] The embodiment of the present application discloses an eccentric disk.

[0030] Reference Figure 1 and Figure 2 The eccentric polishing head includes a polishing disc 1, a base 2, an eccentric shaft 3, a main shaft 4, an air-sealed plate pressure ring 5, a middle waterproof cover 6 and a waterproof outer ring 7. The main shaft 4 is rotatably connected to the base 2. When the main shaft 4 rotates, it drives the eccentric shaft 3 to rotate together. The eccentric shaft 3 drives the polishing disc 1 to rotate together. The air-sealed plate pressure ring 5, the middle waterproof cover 6 and the waterproof outer ring 7 prevent external water from entering the base 2. Specifically, one end of the eccentric shaft 3 is fixed on the throwing disk 1, and the other end of the eccentric shaft 3 is passed through the main shaft 4. A plane bearing 18 and a high-strength film 12 are installed under the eccentric shaft 3; the main shaft 4 can drive the eccentric shaft 3 to rotate, and the axis of the main shaft 4 is misaligned with the axis of the eccentric shaft 3; the base 2 is provided with an air-sealing plate pressure ring 5 at one end facing the throwing disk 1, and a waterproof outer ring 7 is provided at the center of the air-sealing plate pressure ring 5, and the air-sealing plate pressure ring 5 and the waterproof outer ring 7 are both sleeved on the main shaft 4, and the air-sealing plate pressure ring 5 is provided with a side facing the throwing disk 1. The stepped positioning grooves are respectively a first positioning groove 51 and a second positioning groove 52. A first annular plate 54 is provided on the side of the air-sealing plate pressure ring 5 facing the base 2; the waterproof outer ring 7 is installed in the first positioning groove of the air-sealing plate pressure ring 5 and cooperates with the air-sealing plate pressure ring 5 to form an air-sealing gap 53; a middle-layer waterproof cover 6 is installed in the second positioning groove 52 of the air-sealing plate pressure ring 5; a water storage tank 61 is provided on the side of the middle-layer waterproof cover 6 facing the throwing disk 1, and the height of the side wall of the water storage tank 61 away from the axis is greater than the height of the side wall close to the axis.

[0031] Reference Figure 1 Specifically, in the embodiment of the present application, an oil nozzle 16 is provided on the outer wall of the base 2, and the oil nozzle 16 is connected to the interior of the base 2. By adding lubricating oil to the oil nozzle, the main shaft 4 inside the base 2 can always be kept in a lubricated state, and it can also play a cooling role.

[0032] Reference Figure 2 and Figure 3 as well as Figure 5The eccentric shaft 3 is sequentially sleeved with an eccentric bearing cover 8, a plurality of single-cover deep groove ball bearings 14 and an inner core ring 17 from top to bottom in height. The inner core ring 17 is fixed to the eccentric shaft 3 by bolts on the side away from the throwing plate 1. A plane bearing 18 and a high-strength rubber sheet 12 are arranged below the inner core ring 17. By placing the plane bearing 18 and the high-strength rubber sheet 12 inside the eccentric hole 411 of the main shaft 4, the eccentric shaft 3 is installed in the eccentric hole 411 without causing the eccentric shaft 3 to be suspended in the air; the plane bearing 18 below the eccentric shaft 3 utilizes its own characteristics of being able to obtain a very high axial load and a high rigidity in a very small space, and is a single-cover deep groove ball shaft of the eccentric shaft 3. The bearing 14 provides a longer service life; at the same time, because during the polishing process of the target object, a certain pressure is generated due to the contact between the workpiece and the throwing disc 1 of the eccentric disc. When the pressure is too large, the torque of the eccentric shaft 3 is insufficient, resulting in the eccentric disc being unable to rotate. For this reason, the structure of the eccentric shaft 3 is changed, so that the pressure generated by the throwing disc 1 when contacting the workpiece is transferred from the original single-cover deep groove ball bearing 14 to the plane bearing 18, avoiding the problem of insufficient torque of the eccentric shaft caused by excessive pressure causing the eccentric shaft to be unable to rotate, thereby increasing the service life of the eccentric disc, reducing the frequency of replacing accessories, reducing labor maintenance costs, and thereby improving polishing efficiency.

[0033] Reference Figure 5 The plane bearing 18 is composed of an upper plane washer 181, a plane retainer assembly 182 with steel balls and a lower plane washer 183. The plane bearing 18 is placed at the bottom of the eccentric hole 411 of the main shaft 4; a high-strength film 12 is arranged below the plane bearing 18. By arranging the high-strength film 12 below the plane bearing 18, the high-strength film 12 acts as a spring here. It is more durable and oil-resistant than a spring at that time. Relatively speaking, the high-strength film 12 also plays a buffering role; the plane bearing 18 is mainly composed of three parts. When the pressure generated by the contact between the workpiece and the throwing disc 1 is too large, the torque of the eccentric shaft 3 will be insufficient, causing the eccentric shaft 3 to be unable to rotate, further causing serious wear of the deep groove ball bearing, for this reason, a high-strength film 12 is arranged below the eccentric shaft 3. A plane bearing 18 is provided, and the cover bearing is composed of an upper plane washer 181, a plane retainer assembly 182 with steel balls and a lower plane washer 183. Because the upper plane washer 181 and the lower plane washer 183 of the plane bearing 18 are both planes, the contact area with the eccentric shaft 3 is increased. When the deep groove ball bearing 14 cannot rotate under force, since the plane bearing 18 is provided below and the plane retainer assembly 182 with steel balls is provided in the plane bearing 18, it can still rotate when subjected to excessive pressure, thereby transferring the force point of the eccentric shaft 3 from the deep groove ball bearing 14 to the plane bearing 18, reducing the frequency of replacing accessories, reducing labor maintenance costs, and increasing the service life of the eccentric disk, thereby improving the polishing efficiency.

[0034] Reference Figure 2 and Figure 5The outer wall of the eccentric bearing cover 8 is fixed to the inner wall of the eccentric hole 411, the eccentric shaft 3 is passed through the eccentric bearing cover 8, and a skeleton oil seal 9 is arranged between the eccentric bearing cover 8 and the eccentric shaft 3. The outer wall of the skeleton oil seal 9 is fixed to the side wall of the eccentric bearing cover 8 on the eccentric shaft 3.

[0035] The main shaft 4 includes an integrally formed eccentric portion 41, a first mounting portion 421 and a second mounting portion 422. The eccentric portion 41 is axially provided with an eccentric hole 411, the eccentric shaft 3 is passed through the eccentric hole 411, and the mounting portion 42 is axially provided with a mounting hole 43 for mounting the driving end of the driving member, and the axis center line of the eccentric hole 411 is offset from the axis center line of the mounting hole 43.

[0036] A deep groove ball bearing 13 is sleeved on the first mounting position 421 of the main shaft 4. The end of the deep groove ball bearing 13 close to the base 2 is attached to the boss of the first mounting portion 421, and the end close to the throwing disc 1 is tightly attached to the first annular plate 54 of the air seal plate pressure ring 5; in this way, a deep groove ball bearing 13 is sleeved on the second mounting position 422, and the deep groove ball bearing 13 on the second mounting position 422 is tightly attached to the boss of the second mounting position 422.

[0037] Reference Figure 2 and Figure 3 The outer wall of the air-sealing plate pressure ring 5 is provided with an air nozzle 10, and the oil nozzle 10 is connected with the inside of the air-sealing plate pressure ring 5. The air nozzle 10 can be inserted into the air pipe to inject gas into the air-sealing plate pressure ring 5, and the injected gas flows out from the water storage tank 61 of the middle waterproof cover through the air-sealing gap 53 between the air-sealing plate pressure ring 5 and the waterproof outer ring 7, so that the water in the water storage tank 61 is not easy to flow into the base 2. Accordingly, while the gas flows inside the base 2, it takes out the heat generated by the high-speed rotation of the main shaft 4 to the outside, which plays a role in cooling, so that the temperature of the eccentric disk is not easy to be too high, thereby improving the working efficiency of the eccentric disk.

[0038] Reference Figure 1 and Figure 2 A counterweight block 11 is provided at one end of the main shaft 4 facing the casting disc 1. The counterweight block 11 increases the mass of the main shaft 4 and makes the eccentric effect better.

[0039] The implementation principle of an eccentric polishing head in the embodiment of the present application is as follows: by placing a plane bearing 18 and a high-strength film 12 inside the eccentric hole 411 of the main shaft 4, the eccentric shaft 3 is installed in the eccentric hole 411 without causing the eccentric shaft 3 to be suspended; the plane bearing 18 below the eccentric shaft 3 uses its own characteristics of being able to obtain a very high axial load and high rigidity in a very small space, thereby providing a longer service life for the single-cover deep groove ball bearing 14 of the eccentric shaft 3; at the same time, during the polishing of the target object, a certain pressure is generated due to the contact between the workpiece and the throwing disc 1 of the eccentric disc. When the pressure is too large, the torque of the eccentric shaft 3 is insufficient, resulting in the eccentric disc being unable to rotate. For this reason, the structure of the eccentric shaft 3 is changed, so that the pressure generated by the throwing disc 1 when contacting the workpiece is transferred from the original single-cover deep groove ball bearing 14 to the plane bearing 18, thereby avoiding the problem of the eccentric shaft being unable to rotate due to insufficient torque caused by excessive pressure; by arranging the high-strength film 12 below the plane bearing 18, the high-strength film 12 here acts as a spring, which is more durable than a spring at that time. , oil resistant, relatively speaking, the excellent film 12 also plays a buffering role; the plane bearing 18 is mainly composed of three parts. When the pressure generated by the contact between the workpiece and the throwing disc 1 is too large, it will cause the eccentric shaft 3 to have insufficient torque, causing the eccentric shaft 3 to be unable to rotate, further causing serious wear of the deep groove ball bearing. For this reason, a plane bearing 18 is arranged under the eccentric shaft 3. The cover bearing is composed of an upper plane washer 181, a plane cage assembly with steel balls 182 and a lower plane washer 183. Because the upper plane washer 181 and the plane bearing 18 The lower plane washers 183 are all flat, which increases the contact area with the eccentric shaft 3. When the deep groove ball bearing 14 cannot rotate under force, due to the flat bearing 18 arranged below, the flat bearing 18 has a flat retainer assembly 182 with steel balls, so that it can still rotate when subjected to excessive pressure, thereby transferring the force point of the eccentric shaft 3 from the deep groove ball bearing 14 to the flat bearing 18, reducing the frequency of replacing accessories, reducing labor maintenance costs, and increasing the service life of the eccentric disk, thereby improving the polishing efficiency.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An eccentric disk, characterized in that: The invention comprises a throwing disk (1), a base (2), an eccentric shaft (3) fixed to the throwing disk (1), and a main shaft (4) rotatably connected to the base (2); the eccentric shaft (3) is inserted into the main shaft (4) at a side away from the throwing disk (1); the main shaft (4) can drive the eccentric shaft (3) to rotate; the axis of the main shaft (4) is misaligned with the axis of the eccentric shaft (3); an air-sealing plate pressure ring (5) is arranged at one end of the base (2) facing the throwing disk (1); a waterproof outer ring (7) is sleeved at the center of the air-sealing plate pressure ring (5); the air-sealing plate pressure ring (5) and the waterproof outer ring (7) are both sleeved on the main shaft (4); the air-sealing plate pressure ring (5) ) is provided with stepped positioning grooves on one side facing the throwing disc (1), namely a first positioning groove (51) and a second positioning groove (52); a first annular plate (54) is provided on the side facing the base (2); the waterproof outer ring (7) is installed in the first positioning groove of the air-sealing plate pressure ring (5) and cooperates with the air-sealing plate pressure ring (5) to form an air-sealing gap (53); a middle waterproof cover (6) is installed in the second positioning groove (52) of the air-sealing plate pressure ring (5); a water storage groove (61) is provided on the side facing the throwing disc (1); the height of the side wall of the water storage groove (61) away from the axis is greater than the height of the side wall close to the axis.

2. The eccentric disk according to claim 1, characterized in that: An oil nozzle (16) is provided on the outer wall of the base (2), and the oil nozzle (16) is communicated with the interior of the base (2).

3. The eccentric disk according to claim 1, characterized in that: The eccentric shaft (3) is provided with an eccentric bearing cover (8), a plurality of single-cover deep groove ball bearings (14) and an inner core ring (17) in sequence from top to bottom in height. The inner core ring (17) is fixed to the eccentric shaft (3) by bolts on the side away from the throwing disc (1). A plane bearing (18) and a high-strength film (12) are provided below the inner core ring (17).

4. The eccentric disk according to claim 3, characterized in that: The plane bearing (18) is composed of an upper plane washer (181), a plane retainer assembly with steel balls (182) and a lower plane washer (183). The plane bearing (18) is placed at the bottom of the eccentric hole (411) of the main shaft (4); a high-strength film (12) is arranged below the plane bearing (18).

5. The eccentric disk according to claim 4, characterized in that: The outer wall of the eccentric bearing cover (8) is fixed to the inner wall of the eccentric hole (411), and the eccentric shaft (3) passes through the eccentric bearing cover (8).

6. The eccentric disk according to claim 4, characterized in that: A skeleton oil seal (9) is provided between the eccentric bearing cover (8) and the eccentric shaft (3), and an outer wall of the skeleton oil seal (9) is fixed to the side wall of the eccentric bearing cover (8) and the eccentric shaft (3).

7. The eccentric disk according to claim 1, characterized in that: An oil nozzle (16) is provided on the outer wall of the base (2); the oil nozzle (16) is communicated with the interior of the base (2) and lubrication is provided to the main shaft (4) through the oil nozzle.

8. The eccentric disk according to claim 1, characterized in that: The main shaft (4) comprises an integrally formed eccentric portion (41), a first mounting position (421) and a second mounting position (422); the eccentric portion (41) is provided with an eccentric hole (411) along the axial direction, and the eccentric shaft (3) is inserted into the eccentric hole (411).

9. The eccentric disk according to claim 8, characterized in that: A deep groove ball bearing (13) is sleeved on the first mounting position (421) of the main shaft (4), and the end of the deep groove ball bearing (13) close to the base (2) is fitted on the boss of the first mounting position (421), and the end close to the throwing disc (1) is tightly attached to the first annular plate (54) of the air seal plate pressure ring (5); thus, a deep groove ball bearing (13) is sleeved on the second mounting position (422), and the deep groove ball bearing (13) on the second mounting position (422) is tightly attached to the boss of the second mounting position (422).

10. The eccentric disk according to claim 1, characterized in that: A counterweight block (11) is provided at one end of the main shaft (4) facing the throwing disc (1).

11. The eccentric disk according to claim 1, characterized in that: An O-ring is sleeved on one end of the base (2) away from the casting disc (1), and the O-ring is used for sealing the eccentric disc.

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