阅读说明：本技术 一种主轴内部轴承保护装置 (Main shaft inner bearing protection device ) 是由 江河秀 江先宗 于 2020-06-01 设计创作，主要内容包括：本发明公开了一种主轴内部轴承保护装置,包括芯轴、前端盖、前端盖外环、前端盖内环、套筒、外迷宫环组、内迷宫环和轴承,前端盖和套筒均套设在芯轴的外侧面上,前端盖外环和前端盖内环套设在前端盖和芯轴之间,外迷宫环组套设在内迷宫环的外侧面上并形成迷宫部,轴承套设在芯轴的外侧面上并设置在外迷宫环组和内迷宫环的上方。本发明通过外迷宫环组与内迷宫环组形成迷宫部制造一个压差环境对主轴进行防护,当主轴旋转过程中,内迷宫环旋转引起压差产生气流,使得外迷宫环组远离轴承的一侧向外吹气把液体向前端吹出,同时带动外迷宫环组靠近轴承一侧的空气向前端流动,带走因轴承旋转产生的热量实现散热降温,从而达到保护轴承的目的。(The invention discloses a main shaft internal bearing protection device which comprises a mandrel, a front end cover outer ring, a front end cover inner ring, a sleeve, an outer labyrinth ring group, an inner labyrinth ring and a bearing. The outer labyrinth ring group and the inner labyrinth ring group form a labyrinth part to manufacture a pressure difference environment to protect the main shaft, when the main shaft rotates, the inner labyrinth ring rotates to cause pressure difference to generate airflow, so that one side of the outer labyrinth ring group, which is far away from the bearing, blows air outwards to blow out liquid to the front end, meanwhile, the air on one side of the outer labyrinth ring group, which is close to the bearing, is driven to flow to the front end, and heat generated by the rotation of the bearing is taken away to realize heat dissipation and cooling, thereby achieving the purpose of protecting the bearing.)

1. A protection device for a bearing inside a main shaft is characterized by comprising a core shaft, a front end cover outer ring, a front end cover inner ring, a sleeve, an outer labyrinth ring group, an inner labyrinth ring and a bearing, the front end cover and the sleeve are sleeved on the outer side surface of the mandrel, the sleeve is arranged above the front end cover, the front end cover outer ring and the front end cover inner ring are sleeved between the front end cover and the mandrel, the front end cover inner ring is arranged above the front end cover outer ring, and is tightly matched and connected with the front end cover outer ring, the inner labyrinth ring is sleeved on the outer side surface of the mandrel and is arranged above the front end cover outer ring and the front end cover inner ring, the outer labyrinth ring group is sleeved on the outer side surface of the inner labyrinth ring and forms a labyrinth part, and the bearing is sleeved on the outer side surface of the mandrel and is arranged above the outer labyrinth ring group and the inner labyrinth ring.

2. The protection device for the inner bearing of the spindle according to claim 1, wherein the outer labyrinth ring set comprises an upper outer labyrinth ring and a lower outer labyrinth ring, the upper outer labyrinth ring is sleeved on the upper end of the inner labyrinth ring, the lower outer labyrinth ring is sleeved on the lower end of the inner labyrinth ring, and inner side surfaces formed by the upper outer labyrinth ring and the lower outer labyrinth ring are matched with the outer side surface of the inner labyrinth ring to form a labyrinth part.

3. The protection device for the internal bearing of the spindle according to claim 2, wherein the bottom surface of the upper outer labyrinth ring is recessed inwards to form a first groove, the inner side surface of the upper outer labyrinth ring extends downwards to form a first convex ring, the top surface of the inner labyrinth ring is recessed inwards to form a second groove matched with the first convex ring, the outer side surface of the upper outer labyrinth ring extends upwards to form a second convex ring matched with the first groove, the first convex ring is matched and inserted with the second groove, and the second convex ring is matched and inserted with the first groove.

4. The internal bearing protection device for the spindle according to claim 2, wherein the outer side surface of the inner labyrinth ring extends outwards to form a third convex ring with a conical cross section, the inner side surfaces of the upper outer labyrinth ring and the lower outer labyrinth ring form a third groove matched with the third convex ring in shape and size, and the third convex ring is matched and inserted with the third groove.

5. The protection device for the internal bearing of the spindle according to claim 4, wherein the third convex ring of the inner labyrinth ring is symmetrically provided with a plurality of notches along the axis of the third convex ring.

6. A spindle inner bearing protection device according to claim 5, wherein the gap is a circular arc gap.

Technical Field

The invention relates to the field of design and manufacture of a main shaft, in particular to a protection device for a bearing inside the main shaft.

Background

With the development of economy and industrial transformation in China, machining centers and numerical control machines are used more and more in the machining industry. The main shaft of the machine tool is an indispensable part in the numerical control lathe, the internal structure of the main shaft clamps a cutter, and the servo motor drives the main shaft to rotate under the action of starting force.

At present, a main shaft on the market forms a protection device to protect a bearing through a front end cover outer ring and a front end cover inner ring. However, the protection device formed by only the front end cover outer ring and the front end cover inner ring still has defects, the phenomena of bearing water inflow and grease overflow are easy to occur, and the service life of the bearing cannot be ensured.

Disclosure of Invention

The present invention provides a protection device for a main shaft inner bearing to solve the above-mentioned problems in the prior art.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a protection device for a main shaft inner bearing comprises a mandrel, a front end cover outer ring, a front end cover inner ring, a sleeve, an outer labyrinth ring group, an inner labyrinth ring and a bearing, the front end cover and the sleeve are sleeved on the outer side surface of the mandrel, the sleeve is arranged above the front end cover, the front end cover outer ring and the front end cover inner ring are sleeved between the front end cover and the mandrel, the front end cover inner ring is arranged above the front end cover outer ring, and is tightly matched and connected with the front end cover outer ring, the inner labyrinth ring is sleeved on the outer side surface of the mandrel and is arranged above the front end cover outer ring and the front end cover inner ring, the outer labyrinth ring group is sleeved on the outer side surface of the inner labyrinth ring and forms a labyrinth part, and the bearing is sleeved on the outer side surface of the mandrel and is arranged above the outer labyrinth ring group and the inner labyrinth ring.

As a further elaboration of the above technical solution:

in the above technical scheme, outer labyrinth ring group includes outer labyrinth ring and lower outer labyrinth ring, it establishes to go up outer labyrinth ring cover the upper end of interior labyrinth ring, outer labyrinth ring cover establishes down the lower extreme of interior labyrinth ring, go up outer labyrinth ring with the medial surface that outer labyrinth ring formed down with the lateral surface cooperation of interior labyrinth ring forms labyrinth portion.

In the technical scheme, the bottom surface of the upper outer labyrinth ring is inwards recessed to form a first groove, the inner side surface of the upper outer labyrinth ring extends downwards to form a first convex ring, the top surface of the inner labyrinth ring is inwards recessed to form a second groove matched with the first convex ring, the outer side surface of the upper outer labyrinth ring extends upwards to form a second convex ring matched with the first groove, the first convex ring is matched and spliced with the second groove, and the second convex ring is matched and spliced with the first groove.

In the technical scheme, the outer side surface of the inner labyrinth ring extends outwards to form a third convex ring with a conical cross section, the inner side surfaces of the upper outer labyrinth ring and the lower outer labyrinth ring form a third groove matched with the third convex ring in shape and size, and the third convex ring is matched with and spliced with the third groove.

In the above technical solution, the third convex ring on the inner labyrinth ring is symmetrically provided with a plurality of notches along the axis thereof.

In the above technical scheme, the opening is an arc opening.

Compared with the prior art, the invention has the beneficial effects that:

1. the outer labyrinth ring group and the inner labyrinth ring group form a labyrinth part to manufacture a pressure difference environment to protect the main shaft, when the main shaft rotates, the inner labyrinth ring rotates to cause pressure difference to generate airflow, so that one side of the outer labyrinth ring group, which is far away from the bearing, blows air outwards to blow out liquid to the front end, meanwhile, the air on one side of the outer labyrinth ring group, which is close to the bearing, is driven to flow to the front end, and heat generated by the rotation of the bearing is taken away to realize heat dissipation and cooling, thereby achieving the purpose of protecting the bearing.

2. The outer side surface of the inner labyrinth ring extends outwards to form a third convex ring with a conical cross section, the inner side surfaces of the upper outer labyrinth ring and the lower outer labyrinth ring form a third groove matched with the third convex ring in shape and size, the third convex ring is matched and spliced with the third groove, the third convex ring on the inner labyrinth ring is symmetrically provided with a plurality of notches along the axis of the third convex ring, and the notches are arranged to generate pressure difference when the main shaft rotates, so that air flow is formed, and the bearing is cooled.

Drawings

FIG. 1 is a partial sectional view of the present invention;

FIG. 2 is a schematic view of the inner labyrinth ring according to the present invention;

FIG. 3 is a cross-sectional view of the inner labyrinth ring in accordance with the present invention;

FIG. 4 is a schematic structural view of an outer labyrinth ring set according to the present invention.

In the figure: 1. a mandrel; 2. a front end cover; 3. a front end cover outer ring; 4. an inner ring of the front end cover; 5. a sleeve; 6. an outer labyrinth ring set; 61. an upper outer labyrinth ring; 62. a lower outer labyrinth ring; 63. a first groove; 64. a first convex ring; 65. a third groove; 7. an inner labyrinth ring; 71. a second groove; 72. a second convex ring; 73. a third convex ring; 74. opening the gap; 8. and a bearing.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The embodiments described by referring to the drawings are exemplary and intended to be used for explaining the present application and are not to be construed as limiting the present application. In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus should not be considered limiting. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise. In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate. In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

As shown in fig. 1-4, a spindle inner bearing protection device includes a spindle 1, a front end cover 2, a front end cover outer ring 3, a front end cover inner ring 4, a sleeve 5, an outer labyrinth ring group 6, an inner labyrinth ring 7 and a bearing 8, wherein the front end cover 2 and the sleeve 5 are both sleeved on the outer side surface of the spindle 1, the sleeve 5 is disposed above the front end cover 2, the front end cover outer ring 3 and the front end cover inner ring 4 are sleeved between the front end cover 2 and the spindle 1, the front end cover inner ring 4 is disposed above the front end cover outer ring 3 and is tightly connected with the front end cover outer ring 3, the inner labyrinth ring 7 is sleeved on the outer side surface of the spindle 1 and is disposed above the front end cover outer ring 3 and the front end cover inner ring 4, the outer labyrinth ring group 6 is sleeved on the outer side surface of the inner labyrinth ring 7 and forms a labyrinth part, bearing 8 cover is established on the lateral surface of dabber 1 and is set up outer labyrinth ring group 6 with the top of interior labyrinth ring 7, outer labyrinth ring group 6 and interior labyrinth ring 7 group form a pressure differential environment of labyrinth portion manufacturing and protect the main shaft, and when the rotatory in-process of main shaft, interior labyrinth ring 7 is rotatory to be caused pressure differential and to produce the air current for one side that bearing 8 was kept away from to outer labyrinth ring group 6 is outwards blown and is blown out liquid to the front end, drives the air that outer labyrinth ring group 6 is close to bearing 8 one side simultaneously and flows to the front end, takes away because of the rotatory heat that produces of bearing 8 realizes the heat dissipation cooling, thereby reaches the purpose of protection bearing 8.

Wherein, dabber 1 is as the main driving medium of main shaft. The front end cover 2 protects the front end of the mandrel 1 and prevents the mandrel 1 from being damaged due to collision of external conditions on the mandrel 1. The front end cover outer ring 3 and the front end cover inner ring 4 form a protection device, liquid is prevented from flowing back to the bearing 8, and the service life of the bearing 8 is influenced. The sleeve 5 serves as a housing to protect the internal structure of the spindle and at the same time serves as a coupling for mounting the spindle to a machine tool. The bearing 8 is the most important element in the main shaft and plays a role in supporting the main shaft to rotate, reducing friction during movement and ensuring rotation precision.

In this embodiment, as shown in fig. 2 to 4, the outer labyrinth ring set 6 includes an upper outer labyrinth ring 61 and a lower outer labyrinth ring 62, the upper outer labyrinth ring 61 is sleeved on the upper end of the inner labyrinth ring 62, the lower outer labyrinth ring 62 is sleeved on the lower end of the inner labyrinth ring 7, and an inner side surface formed by the upper outer labyrinth ring 61 and the lower outer labyrinth ring 62 is matched with an outer side surface of the inner labyrinth ring 7 to form a labyrinth portion. Specifically, the bottom surface of the upper outer labyrinth ring 61 is inwards recessed to form a first groove 63, the inner side surface of the upper outer labyrinth ring extends downwards to form a first convex ring 64, the top surface of the inner labyrinth ring 7 is inwards recessed to form a second groove 71 matched with the first convex ring 6, the outer side surface of the upper outer labyrinth ring extends upwards to form a second convex ring 72 matched with the first groove 63, the first convex ring 64 is matched and spliced with the second groove 63, and the second convex ring 72 is matched and spliced with the first groove 63. Specifically, the outer side surface of the inner labyrinth ring 7 extends outwards to form a third convex ring 73 with a tapered cross section, the inner side surfaces of the upper outer labyrinth ring 61 and the lower outer labyrinth ring 62 form a third groove 65 matched with the third convex ring 73 in shape and size, and the third convex ring 73 is matched and spliced with the third groove 65.

Preferably, as shown in fig. 2, the third convex ring 73 on the inner labyrinth ring 7 is symmetrically provided with a plurality of notches 74 along the axis thereof, and through the arrangement of the notches 74, when the main shaft rotates, a pressure difference is generated inside, so as to form an air flow, thereby cooling the bearing 8. In this embodiment, 7 openings 74 are symmetrically arranged along the axis of the inner labyrinth ring 7, and the openings 74 are circular arc-shaped openings. Of course, the specific number, distribution and shape of the openings 74 can be set according to different models of products and the functional requirements of different products, and are not limited in this embodiment.

According to the invention, a pressure difference environment is manufactured to protect the main shaft by the labyrinth part formed by the outer labyrinth ring group 6 and the inner labyrinth ring group 7, when the main shaft rotates, the surface of the outer labyrinth ring group 6 close to the bearing generates air flow to cool the inside of the bearing 8, so that the temperature of the bearing 8 in the rotation process of the main shaft is reduced, the surface of the outer labyrinth ring group 6 far away from the bearing 8 blows liquid generated at the front end of the main shaft outwards, the water inlet of the bearing 8 is avoided, the bearing 8 is effectively protected, and the service life of the bearing 8 is ensured.

The technical scope of the present invention is not limited to the above embodiments, and any modifications, equivalent variations and modifications made to the above embodiments according to the technical spirit of the present invention still fall within the technical scope of the present invention.