Waterproof main shaft for high-precision grinding machine

Abstract

The utility model discloses a waterproof main shaft for a high-precision grinding machine. The waterproof main shaft comprises a main shaft body, the first paired bearing is mounted at the front section of the main shaft body; the second paired bearing is mounted at the rear end of the main shaft body; the outer sleeve is arranged on the circumferential outer surface of the main shaft body in a sleeving manner; the first water outlet is positioned at the front end of the main shaft body and is arranged on one side of the first waterproof cover; and the second water outlet is positioned at the rear end of the main shaft body and is arranged on one side of the second waterproof cover. Compared with the prior art, water is not prone to entering the waterproof spindle, and the service life of the spindle is prolonged.

Description

Technical Field

[0001] The invention relates to a waterproof spindle for a high-precision grinding machine. Background Art

[0002] At present, the spindles used in high-precision grinders are prone to water ingress, which shortens their service life. When water enters the spindle, water enters the inside of the bearing, the lubrication function of the bearing decreases, and the bearing fails prematurely.

[0003] Therefore, providing a device that is not easy to get into water and prolongs the service life of the main shaft is a problem to be solved at present. Utility Model Content

[0004] The purpose of the invention is to provide a waterproof spindle for a high-precision grinding machine which is not easy to be infiltrated with water and has a prolonged service life of the spindle.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A waterproof spindle for a high-precision grinding machine, comprising:

[0007] Spindle body;

[0008] a first paired bearing, the first paired bearing being mounted on a front section of the main shaft body;

[0009] a second paired bearing, the second paired bearing being mounted at the rear end of the main shaft body;

[0010] An outer sleeve, the outer sleeve being sleeved on the circumferential outer surface of the main shaft body;

[0011] A first end cover, which passes through the front end of the main shaft body and presses the outer sleeve to form a fixed end;

[0012] A second end cover, the second end cover passes through the rear cover from the rear end of the main shaft body and is on the outer sleeve, and a gap is provided between the outer sleeve and the first end cover to form a floating end;

[0013] a first waterproof cover, the first waterproof cover covering the first end cover;

[0014] a second waterproof cover, the second waterproof cover being covered on the second end cover;

[0015] A first drain port, the first drain port is located at the front end of the main shaft body and is arranged on one side of the first waterproof cover;

[0016] The second drainage port is located at the rear end of the main shaft body and is arranged on one side of the second waterproof cover.

[0017] Furthermore, the first end cover is fixed to the outer sleeve by a bolt fastener, and the first waterproof cover is fixed to the first end cover by a bolt fastener; the second end cover is fixed to the outer sleeve by a bolt fastener, and the second waterproof cover is fixed to the second end cover by a bolt fastener.

[0018] Furthermore, the first paired bearings are installed in a TBT pairing manner using angular contact bearings.

[0019] Furthermore, the second paired bearings are installed in a BD pairing manner using angular contact bearings.

[0020] Furthermore, a first bearing spacer is provided between the first pair of bearings, and a second bearing spacer is provided between the second pair of bearings.

[0021] Furthermore, it also includes a first waterproof labyrinth and a second waterproof labyrinth, wherein the first waterproof labyrinth is located between the first end cover and the first waterproof cover, and the second waterproof labyrinth is located between the second end cover and the second waterproof cover.

[0022] Furthermore, it also includes a first sealing ring and a second sealing ring, wherein the first sealing ring is located between the first end cover and the outer sleeve, and the second sealing ring is located between the second end cover and the outer sleeve.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: due to the first waterproof cover and the second waterproof cover, and the first drainage port is located at the front end of the main shaft body and is arranged on one side of the first waterproof cover, and the second drainage port is located at the rear end of the main shaft body and is arranged on one side of the second waterproof cover. During the cutting process, a large amount of coolant will be flushed by the workpiece, which will first be blocked by the outer waterproof cover, that is, a small amount of water will penetrate from the gap of the shaft to the inner layer, and when it hits the high-speed rotating nut inside, the water will be thrown out immediately, and the drainage port is left below to allow the penetrated water to be discharged from the body, thereby extending the life of the waterproof main shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is the structural diagram of the waterproof spindle for this new high-precision grinder. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clearly understood, the spirit of the contents disclosed in the present invention will be clearly explained with the accompanying drawings and detailed descriptions below. After understanding the embodiments of the contents of the present invention, any technician in the relevant technical field can change and modify the contents of the present invention by the techniques taught by the contents of the present invention without departing from the spirit and scope of the contents of the present invention.

[0026] The exemplary embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention. In addition, the elements / components with the same or similar reference numerals used in the drawings and embodiments are used to represent the same or similar parts.

[0027] The terms “first”, “second”, etc. used in this document do not particularly refer to an order or sequence, nor are they used to limit the present invention. They are only used to distinguish elements or operations described with the same technical terms.

[0028] The directional terms used in this document, such as up, down, left, right, front or back, etc., are only used to refer to the directions of the drawings. Therefore, the directional terms used are used to illustrate and not to limit the present invention.

[0029] The words “include,” “including,” “have,” “contain,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0030] As used herein, "and / or" includes any or all combinations of the items described.

[0031] The terms "substantially" and "approximately" used herein are used to modify any quantity or error that may vary slightly, but these slight changes or errors do not change their essence. Generally speaking, the range of slight changes or errors modified by such terms may be 20% in some embodiments, 10% in some embodiments, 5% in some embodiments, or other values. Those skilled in the art should understand that the aforementioned values ​​can be adjusted according to actual needs and are not limited thereto.

[0032] Certain terms used to describe the present application are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art regarding the description of the present application.

[0033] The embodiment of the present invention provides a waterproof spindle for a high-precision grinding machine, such as Figure 1 As shown, including:

[0034] Spindle body 1;

[0035] The first paired bearing 2 is installed in the front section of the spindle body 1. The first paired bearing 2 is designed as a fixed end. The first paired bearing 2 and the hole are matched with JS3 grade precision tolerance, and the target clearance is 3~7um. When installing the first paired bearing 2, you can gently push it into the sleeve by hand;

[0036] The second paired bearing 3 is installed at the rear end of the spindle body 1 to improve the accuracy of the grinder. The second paired bearing 3 and the hole are matched with H3 grade precision tolerance, and the target clearance is 8~13um. When installing the second paired bearing 3, it can be easily pushed into the sleeve by hand;

[0037] An outer sleeve 4, wherein the outer sleeve 4 is sleeved on the circumferential outer surface of the spindle body 1;

[0038] The first end cover 5 passes through the front end of the main shaft body 1 and presses the outer sleeve 4 to form a fixed end.

[0039] The second end cover 6 passes through the rear cover from the rear end of the main shaft body 1 on the outer sleeve 4. A gap 7 is provided between the outer sleeve 4 and the second end cover 5 to form a floating end. When the second paired bearing expands and contracts due to heat during operation, the second paired bearing can slide freely in the axial direction to release the displacement of the shaft and ensure that the position of the front end remains fixed.

[0040] A first waterproof cover 8, wherein the first waterproof cover 8 covers the first end cover 5;

[0041] A second waterproof cover 9, wherein the second waterproof cover 9 covers the second end cover 6;

[0042] A first drain port 10, which is located at the front end of the main shaft body and is arranged on one side of the first waterproof cover;

[0043] The second drainage port 11 is located at the rear end of the main shaft body 1 and is arranged on one side of the second waterproof cover 9 .

[0044] Specifically, since the first waterproof cover 8 and the second waterproof cover 9 are provided, and the first drainage port 10 is located at the front end of the spindle body and is provided on one side of the first waterproof cover 8, and the second drainage port 11 is located at the rear end of the spindle body and is provided on one side of the second waterproof cover 9, a large amount of coolant will be flushed by the workpiece during the cutting process, which will first be blocked by the outer waterproof cover, that is, a small amount of water will penetrate from the gap of the shaft to the inner layer, and when it hits the high-speed rotating nut inside, the water will be thrown out immediately, and the drainage port is left below to allow the penetrated water to be discharged from the body, thereby extending the life of the waterproof spindle.

[0045] Specifically, the first end cover 5 is fixed to the outer sleeve 4 by a bolt fixing part, and the first waterproof cover is fixed to the first end cover by a bolt fixing part 12; the second end cover 6 is fixed to the outer sleeve by a bolt fixing part, and the second waterproof cover is fixed to the second end cover by a bolt fixing part, ensuring that the first end cover and the second end cover can be firmly fixed to the outer sleeve. The bearing is mainly lubricated by grease in the raceway. When the main shaft is flooded, water enters the bearing, and the lubrication function of the bearing is reduced, resulting in premature failure of the bearing.

[0046] Specifically, the first paired bearing 2 is installed in a TBT pairing manner using an angular contact bearing, and the second paired bearing 3 is installed in a BD pairing manner using an angular contact bearing. The fit between the bearing and the main shaft uses an H3 level precision tolerance, with a target interference amount of 2~3um. The bearing is installed using a hot-fitting method, the inner ring is heated, quickly installed on the shaft, and then the bearing is compacted using a press.

[0047] In addition, it should be noted that a first bearing spacer 13 is provided between the first paired bearings 2 to avoid collision or friction between the first paired bearings 2, and a second bearing spacer 14 is provided between the second paired bearings to avoid collision or friction between the second paired bearings 3.

[0048] In addition, it is worth mentioning that it also includes a first waterproof maze 15 and a second waterproof maze 16. The first waterproof maze is located between the first end cover 5 and the first waterproof cover 8, and the second waterproof maze 15 is located between the second end cover 6 and the second waterproof cover 9. The first waterproof maze 15 and the second waterproof maze 16 are designed to be a V-shaped maze structure. A large amount of coolant will be flushed into the workpiece during the cutting process. It will first be blocked by the outer waterproof cover, that is, a small amount of water will penetrate into the inner layer from the gap of the shaft. When it hits the high-speed rotating nut inside, the water will be thrown out immediately. A drainage port is left below to allow the penetrated water to be discharged from the body.

[0049] In addition, in order to further waterproof, a first sealing ring 17 and a second sealing ring 18 are also included. The first sealing ring is located between the first end cover and the outer sleeve, and the second sealing ring is located between the second end cover and the outer sleeve.

[0050] The above description is only an illustrative specific implementation of the present invention. Without departing from the concept and principle of the present invention, any equivalent changes and modifications made by those skilled in the art should fall within the scope of protection of the present invention.

Claims

1. A waterproof spindle for a high-precision grinder, characterized in that: include: Spindle body; a first paired bearing, the first paired bearing being mounted on a front section of the main shaft body; a second paired bearing, the second paired bearing being mounted at the rear end of the main shaft body; An outer sleeve, the outer sleeve being sleeved on the circumferential outer surface of the main shaft body; A first end cover, which passes through the front end of the main shaft body and presses the outer sleeve to form a fixed end; A second end cover, the second end cover passes through the rear cover from the rear end of the main shaft body and is on the outer sleeve, and a gap is provided between the outer sleeve and the first end cover to form a floating end; a first waterproof cover, the first waterproof cover covering the first end cover; a second waterproof cover, the second waterproof cover being covered on the second end cover; A first drain port, the first drain port is located at the front end of the main shaft body and is arranged on one side of the first waterproof cover; a second drain port, the second drain port being located at the rear end of the main shaft body and being arranged on one side of the second waterproof cover, the first end cover being fixed to the outer sleeve by a bolt fixing member, the first waterproof cover being fixed to the first end cover by a bolt fixing member; the second end cover being fixed to the outer sleeve by a bolt fixing member, the second waterproof cover being fixed to the second end cover by a bolt fixing member; It also includes a first waterproof labyrinth and a second waterproof labyrinth, wherein the first waterproof labyrinth is located between the first end cover and the first.

2. The waterproof spindle for a high-precision grinder according to claim 1, characterized in that: The first paired bearings are installed in a TBT pairing manner using angular contact bearings.

3. The waterproof spindle for a high-precision grinder according to claim 2, characterized in that: The second paired bearings are installed in a BD pairing manner using angular contact bearings.

4. The waterproof spindle for a high-precision grinder according to claim 1, characterized in that: A first bearing spacer is provided between the first pair of bearings, and a second bearing spacer is provided between the second pair of bearings.

5. The waterproof spindle for a high-precision grinder according to claim 1, characterized in that: The second waterproof labyrinth is located between the second end cover and the second waterproof cover.

6. The waterproof spindle for a high-precision grinder according to claim 1, characterized in that: It also includes a first sealing ring and a second sealing ring, wherein the first sealing ring is located between the first end cover and the outer sleeve, and the second sealing ring is located between the second end cover and the outer sleeve.

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