An external cylindrical grinder spindle

Abstract

The utility model discloses a cylindrical grinding machine main shaft, including the axle body, the shell, the inner cover, the outer cover, the air curtain hole, the drain hole, the axle body is coaxially loaded in the shell, the both ends of shell are covered with the inner cover, the outer cover is stacked with the inner cover outside, be provided with first water retaining ring on the axle body, the inner cover is provided with the integrative second water retaining ring, the second water retaining ring installs in the port inner wall of shell, first water retaining ring, second water retaining ring mutually cooperate and form the zigzag water retaining joint, the inner cover is provided with the air curtain hole in the outer end port of water retaining joint, the outer cover is cooperated in the axle body outer peripheral surface and forms the water inlet joint. Through above -mentioned mode, the utility model provides a cylindrical grinding machine main shaft, forms the quick drainage channel through the air curtain hole and the drain hole, and realizes directional control and arranges simultaneously with air seal groove and guide angle, and the bearing distribution structure is optimized to the grinding wheel load simultaneously, thereby significantly improved the waterproof sealing performance and running stability of main shaft whole.

Description

Technical Field

[0001] This utility model relates to the field of spindles, and more particularly to a spindle for an external cylindrical grinding machine. Background Technology

[0002] During the rotation of the grinding wheel, the spindle of an external cylindrical grinding machine generates a large amount of water vapor. This water vapor can easily seep into the spindle, causing internal corrosion and affecting its lifespan and machining accuracy. Existing technologies usually use a bent joint structure to achieve a water-blocking effect. However, the water film accumulated in the gap will continue to cause seepage under the centrifugal force during high-speed operation, resulting in poor waterproof performance and a short spindle lifespan. Utility Model Content

[0003] The main technical problem solved by this utility model is to provide a cylindrical grinding machine spindle that forms a rapid drainage channel through air curtain holes and drainage holes, and achieves directional drainage control by using air seal grooves and guide angles. At the same time, the bearing distribution structure is optimized for the grinding wheel load, thereby significantly improving the overall waterproof sealing performance and operational stability of the spindle.

[0004] To solve the above-mentioned technical problems, the present invention provides a cylindrical grinding machine spindle, comprising a spindle body, a housing, an inner cover, an outer cover, an air curtain hole, and a drainage hole. The spindle body is coaxially mounted inside the housing. The inner cover covers both ends of the housing. An outer cover is stacked on the outer side of the inner cover. A first water-blocking ring is provided on the spindle body. An integrally formed second water-blocking ring is provided on the inner cover. The second water-blocking ring is installed on the inner wall of the port of the housing. The first water-blocking ring and the second water-blocking ring cooperate with each other to form a tortuous water-blocking joint. An air curtain hole is provided at the outer end port of the water-blocking joint of the inner cover. The outer cover fits on the outer circumferential surface of the spindle body to form a water inlet joint. A drainage hole is provided at the water inlet joint of the outer cover. The air curtain hole communicates with the drainage hole.

[0005] In a preferred embodiment of the present invention, a tapered loading interface is provided at the front end of the shaft for mounting a grinding wheel, and a drive pulley is provided at the rear end of the shaft.

[0006] In a preferred embodiment of the present invention, four heavy-duty bearings are provided at each end of the inner wall of the outer shell, and the shaft is loaded inside the heavy-duty bearings.

[0007] In a preferred embodiment of the present invention, the first water-blocking ring is coaxially mounted on the shaft body by embedding a first sealing ring, and the second water-blocking ring is coaxially mounted inside the outer casing by embedding a second sealing ring.

[0008] In a preferred embodiment of the present invention, the outer cover has a water storage groove on the mating surface with the shaft, and the drain hole is opened in the water storage groove.

[0009] In a preferred embodiment of this utility model, the distance between the drainage hole and the air curtain hole is in the range of 90°~180° or 120°±15%.

[0010] In a preferred embodiment of the present invention, the inner cover is provided with an air seal groove that communicates with the air curtain hole, the first water baffle ring is provided with an outwardly inclined guide angle, the guide angle is directly opposite the air seal groove, and the surface of the guide angle is provided with a flow guide groove.

[0011] The beneficial effects of this utility model are: the external cylindrical grinding machine spindle provided by this utility model forms a rapid drainage channel through air curtain holes and drainage holes, and realizes directional drainage by using air seal grooves and guide angles. At the same time, the bearing distribution structure is optimized for the grinding wheel load, thereby significantly improving the overall waterproof sealing performance and operational stability of the spindle. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0013] Figure 1 This is an overall structural diagram of a preferred embodiment of the external cylindrical grinding machine spindle of this utility model;

[0014] Figure 2 This is a front end structural diagram of a preferred embodiment of the spindle of an external cylindrical grinding machine according to the present invention;

[0015] Figure 3 This is a guide angle structure diagram of a preferred embodiment of the spindle of an external cylindrical grinding machine according to the present invention. Detailed Implementation

[0016] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] like Figure 1-3 As shown, the embodiments of this utility model include:

[0018] A cylindrical grinding machine spindle includes a spindle body 1, a housing 2, an inner cover 3, an outer cover 4, an air curtain hole 5, and a drain hole 6. The spindle body 1 is coaxially mounted inside the housing 2. The housing 2 is covered by the inner cover 3 at both ends. The outer cover 4 is stacked on the outer side of the inner cover 3. A first water-blocking ring 7 is provided on the spindle body 1. The inner cover 3 is provided with an integrally formed second water-blocking ring 8. The second water-blocking ring 8 is installed on the inner wall of the port of the housing 2. The first water-blocking ring 7 and the second water-blocking ring 8 cooperate with each other to form a tortuous water-blocking joint 9. The inner cover 3 is provided with an air curtain hole 5 at the outer end of the water-blocking joint 9. The outer cover 4 is fitted on the outer circumferential surface of the spindle body 1 to form a water inlet joint 10. The outer cover 4 has a drain hole 6 at the water inlet joint 10. The air curtain hole 5 communicates with the drain hole 6.

[0019] The shaft 1 has a tapered loading interface 11 at its front end for mounting a grinding wheel, and a drive pulley 12 at its rear end.

[0020] Furthermore, four heavy-duty bearings 13 are provided at each end of the inner wall of the outer shell 2, and the shaft 1 is loaded inside the heavy-duty bearings 13.

[0021] Furthermore, the first water-blocking ring 7 is coaxially mounted on the shaft body 1 by embedding a first sealing ring 14, and the second water-blocking ring 8 is coaxially mounted inside the outer casing 2 by embedding a second sealing ring 15.

[0022] Furthermore, the outer cover 4 has a water storage tank 16 on the mating surface with the shaft 1, and the drain hole 6 is opened in the water storage tank 16.

[0023] Furthermore, the distance between the drain hole 6 and the air curtain hole 5 is in the range of 90°~180° or 120°±15%.

[0024] Furthermore, the inner cover 3 has an air seal groove 17 that communicates with the air curtain hole 5, and the first water baffle ring 7 has an outwardly inclined guide angle 18, which is directly opposite the air seal groove 17, and a flow guide groove is formed on the surface of the guide angle 18.

[0025] This product is a high-precision, high-rigidity cylindrical grinding machine spindle, whose main features are excellent water-proof protection and rapid drainage performance.

[0026] Its outer cover 4 is mainly used for protection. It fits on the shaft 1 and has a very small gap reserved to initially block the entry of water. The inner cover 3 provides further water-proof sealing, constructs an air curtain to block water ingress, and accelerates the directional discharge of internal water vapor through compressed air in the air seal channel. Combined with the guide angle 18 and / or the guide groove, the water vapor is drawn out more quickly.

[0027] This product is driven by a synchronous belt pulley set. The shaft 1 is supported by eight heavy-duty bearings 13, which provides high rigidity for the stable operation of the grinding wheel, thereby improving the texture roughness / surface smoothness and making the mirror effect better.

[0028] As the grinding wheel rotates, the water vapor surrounding it is first intercepted in the water tank 16 and discharged through the drain hole 6. When the water vapor further penetrates to the air seal groove 17, it is blown out by compressed air. The blown-out water vapor accumulates in the water tank 16 until it is discharged through the drain hole 6. A very small amount of water vapor further penetrates into the water-blocking joint 9, which is a bend in the seam similar to a zigzag bridge structure. The water vapor accumulates and condenses within the joint and is trapped at the bend, preventing further penetration.

[0029] In summary, this utility model provides a cylindrical grinding machine spindle that forms a rapid drainage channel through the air curtain hole 5 and the drainage hole 6, and achieves directional drainage control by using the air seal groove 17 and the guide angle 18. At the same time, the bearing distribution structure is optimized for the grinding wheel load, thereby significantly improving the overall waterproof sealing performance and operational stability of the spindle.

[0030] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A cylindrical grinding machine spindle, characterized in that, The device includes a shaft, a housing, an inner cover, an outer cover, an air curtain hole, and a drain hole. The shaft is coaxially mounted inside the housing. The housing is covered by the inner cover at both ends. An outer cover is stacked on the outside of the inner cover. A first water-blocking ring is provided on the shaft. The inner cover is provided with an integrally formed second water-blocking ring. The second water-blocking ring is installed on the inner wall of the port of the housing. The first and second water-blocking rings cooperate with each other to form a zigzag water-blocking joint. An air curtain hole is provided at the outer end of the water-blocking joint of the inner cover. The outer cover fits on the outer circumferential surface of the shaft and forms a water inlet joint. A drain hole is provided at the water inlet joint of the outer cover. The air curtain hole communicates with the drain hole.

2. The cylindrical grinding machine spindle according to claim 1, characterized in that, The front end of the shaft is provided with a tapered loading interface for mounting a grinding wheel, and the rear end of the shaft is provided with a drive pulley.

3. The cylindrical grinding machine spindle according to claim 1, characterized in that, Four heavy-duty bearings are provided at each end of the inner wall of the outer casing, and the shaft is loaded inside the heavy-duty bearings.

4. The cylindrical grinding machine spindle according to claim 1, characterized in that, The first water-blocking ring is coaxially mounted on the shaft body by embedding a first sealing ring, and the second water-blocking ring is coaxially mounted inside the outer casing by embedding a second sealing ring.

5. The cylindrical grinding machine spindle according to claim 1, characterized in that, The outer cover has a water storage groove on the mating surface with the shaft, and the drain hole is opened in the water storage groove.

6. The cylindrical grinding machine spindle according to claim 1, characterized in that, The distance between the drainage hole and the air curtain hole is in the range of 90°~180° or 120°±15%.

7. The cylindrical grinding machine spindle according to claim 1, characterized in that, The inner cover has an air seal groove that connects to the air curtain hole, and the first water baffle ring has an outwardly inclined guide angle that faces the air seal groove. The surface of the guide angle has a flow guide groove.

Images