阅读说明：本技术 防油污主轴结构 (Oil pollution prevention main shaft structure ) 是由 胡真清 欧昭 于 2019-12-24 设计创作，主要内容包括：本发明属于机床技术领域,尤其涉及防油污主轴结构,包括主轴套和芯轴,主轴套的内孔中设有轴承,芯轴穿过轴承的内圈；主轴套的内圈设有向内延伸的凸环,凸环的内圈与主轴的外圈将主轴套的内部分成上、下腔体,轴承位于下腔体内；主轴套上设有排油孔,排油孔与上腔体连通,芯轴上紧密地套设有挡油圈,挡油圈位于凸环的上方芯轴的外部进入到主轴套内部的切削液在会积累在挡油圈的顶面,并且在主轴高速的旋转下,挡油圈上的切削液产生较大的离心力,从而将甩在主轴套的内壁,再流向凸环的顶部,再有排油孔排出；因此避免了切削液进入到轴承内,从而达到对主轴内的轴承起到保护作用,保证了轴承的使用寿命。(The invention belongs to the technical field of machine tools, and particularly relates to an oil-stain-proof spindle structure which comprises a spindle sleeve and a spindle, wherein a bearing is arranged in an inner hole of the spindle sleeve, and the spindle penetrates through an inner ring of the bearing; the inner ring of the main shaft sleeve is provided with a convex ring extending inwards, the inner ring of the convex ring and the outer ring of the main shaft divide the interior of the main shaft sleeve into an upper cavity and a lower cavity, and the bearing is positioned in the lower cavity; the spindle sleeve is provided with an oil discharge hole which is communicated with the upper cavity, the mandrel is tightly sleeved with an oil baffle ring, cutting fluid entering the interior of the spindle sleeve from the outside of the mandrel above the convex ring of the oil baffle ring can be accumulated on the top surface of the oil baffle ring, and under the high-speed rotation of the spindle, the cutting fluid on the oil baffle ring generates a larger centrifugal force, so that the cutting fluid is thrown to the inner wall of the spindle sleeve and then flows to the top of the convex ring, and the oil is discharged through the oil discharge hole; therefore, the cutting fluid is prevented from entering the bearing, the bearing in the main shaft is protected, and the service life of the bearing is ensured.)

1. The oil pollution prevention main shaft structure comprises a main shaft sleeve and a core shaft, wherein a bearing is arranged in an inner hole of the main shaft sleeve, and the core shaft penetrates through an inner ring of the bearing; the inner ring of the spindle sleeve is provided with a convex ring extending inwards, the inner ring of the convex ring and the outer ring of the mandrel divide the interior of the spindle sleeve into an upper cavity and a lower cavity, and the bearing is positioned in the lower cavity; the oil drain hole is formed in the main shaft sleeve and communicated with the upper cavity body, the mandrel is tightly sleeved with the oil blocking ring, and the oil blocking ring is located above the convex ring.

2. The grease proofing dirty main shaft structure of claim 1, characterized in that: the top surface of the convex ring is a conical surface, the high point of the conical surface is close to the mandrel, and the root of the conical surface is connected with the spindle sleeve; the outer ring of the oil baffle ring extends to the upper part of the conical surface.

3. The grease proofing dirty main shaft structure of claim 1, characterized in that: the bottom end of the oil discharge hole is not higher than the lowest position of the top surface of the convex ring.

4. The grease proofing dirty main shaft structure of claim 1, characterized in that: the axis of the oil drain hole is flush with the top surface of the convex ring, or the axis of the oil drain hole intersects with the lowest point of the convex ring.

5. An oil fouling prevention main shaft structure according to any one of claims 1 to 4, characterized in that: the oil baffle ring is higher than the top surface of the oil discharge hole.

6. An oil fouling prevention main shaft structure according to any one of claims 1 to 4, characterized in that: the mandrel is further provided with a conical part, and the lower end of the conical part extends to the top of the oil baffle ring.

7. The grease proofing dirty main shaft structure of claim 1, characterized in that: the convex ring and the spindle sleeve are integrally formed.

8. The grease proofing dirty main shaft structure of claim 1, characterized in that: a pull rod is arranged in the mandrel and used for opening a clamping structure of a tool blind rivet when the spindle is used for tool changing; two sides of the upper end of the mandrel are symmetrically provided with clearance holes, the upper end of the pull rod is connected with a push block, and two ends of the push block penetrate through the corresponding clearance holes; the upper end of the main shaft sleeve is also provided with a tail end cover; the upper end of the mandrel is sleeved with a sliding sleeve, the sliding sleeve extends into the upper cavity, and the upper end of the sliding sleeve penetrates through the tail end cover and is in sliding connection with the tail end cover; a piston ring is further arranged at one end, extending into the upper cavity, of the sliding sleeve, is in sliding fit with the inner wall of the spindle sleeve, a first sealing ring is sleeved on the piston ring, and the piston ring separates the upper cavity to form an upper piston cavity and a lower piston cavity; the inner ring of the tail end cover is provided with a second sealing ring, the lower end of the lower piston cavity extends inwards to form an annular bulge, and the inner ring of the annular bulge is provided with a third sealing ring; two oil pipe joints are arranged on the main shaft sleeve, one oil pipe joint is communicated with the upper piston cavity, and the other oil pipe joint is communicated with the lower piston cavity; the inside of sliding sleeve is equipped with the step hole, the roof in step hole is used for spacing the ejector pad.

9. The grease proofing dirty main shaft structure of claim 1, characterized in that: the bottom end of the main shaft sleeve is also provided with a plurality of temperature detecting holes, and the temperature detecting holes extend to one side of a bearing mounting position of the main shaft sleeve; the temperature detecting hole is used for installing a temperature sensor.

10. The grease proofing dirty main shaft structure of claim 1, characterized in that: a plurality of cooling grooves are uniformly formed in the outer ring of the main shaft sleeve, and the cooling grooves are annular grooves; and adjacent cooling grooves form annular rings, and gaps are formed in one side of each annular ring and the other side of the adjacent annular ring.

Technical Field

The invention belongs to the technical field of cutting machine tools, and particularly relates to an oil-stain-proof spindle structure.

Background

The numerical control machining center is a device commonly used in the machining industry at present. The numerical control machining center drives the cutter to rotate at a high speed through the main shaft, so that the workpiece is machined. The main shaft rotates at a high speed, and can rotate at a high speed through the bearing so as to meet the requirement of high-speed rotation of the bearing; grease is therefore required to lubricate the bearings. In the actual course of working, cutting fluid or cutting oil collide with the rotatory cutter of high speed to can produce water smoke, oil mist, and oil mist and water smoke can accumulate at the top of main shaft, therefore the oil mist of overstocking and water smoke form liquid, enter into the main shaft inside from the clearance of assembly, thereby can wash and dissolve the lubricating grease of bearing, thereby accelerate bearing wear, reduce the practical life of main shaft.

Disclosure of Invention

The invention aims to provide an oil-stain-proof main shaft structure, and aims to solve the problem that oil mist and water mist enter a bearing during processing to wash and dissolve lubricating grease of the bearing in the prior art.

In order to achieve the purpose, the oil pollution prevention spindle structure provided by the embodiment of the invention comprises a spindle sleeve and a spindle, wherein a bearing is arranged in an inner hole of the spindle sleeve, and the spindle penetrates through an inner ring of the bearing; the inner ring of the spindle sleeve is provided with a convex ring extending inwards, the inner ring of the convex ring and the outer ring of the mandrel divide the interior of the spindle sleeve into an upper cavity and a lower cavity, and the bearing is positioned in the lower cavity; the oil drain hole is formed in the main shaft sleeve and communicated with the upper cavity body, the mandrel is tightly sleeved with the oil blocking ring, and the oil blocking ring is located above the convex ring.

Further, the top surface of the convex ring is a conical surface, the high point of the conical surface is close to the mandrel, and the root of the conical surface is connected with the spindle sleeve; the outer ring of the oil baffle ring extends to the upper part of the conical surface.

Further, the bottom end of the oil drain hole is not higher than the lowest position of the top surface of the convex ring.

Further, the axis of the oil drain hole is flush with the top surface of the convex ring, or the axis of the oil drain hole intersects with the lowest point of the convex ring.

Further, the oil baffle ring is higher than the top surface of the oil discharge hole.

Further, a conical part is further arranged on the mandrel, and the lower end of the conical part extends to the top of the oil baffle ring.

Further, the convex ring and the spindle sleeve are integrally formed.

Further, a pull rod is arranged in the mandrel and used for opening a clamping structure of a tool blind rivet when the spindle is used for tool changing; two sides of the upper end of the mandrel are symmetrically provided with clearance holes, the upper end of the pull rod is connected with a push block, and two ends of the push block penetrate through the corresponding clearance holes; the upper end of the main shaft sleeve is also provided with a tail end cover; the upper end of the mandrel is sleeved with a sliding sleeve, the sliding sleeve extends into the upper cavity, and the upper end of the sliding sleeve penetrates through the tail end cover and is in sliding connection with the tail end cover; a piston ring is further arranged at one end, extending into the upper cavity, of the sliding sleeve, is in sliding fit with the inner wall of the spindle sleeve, a first sealing ring is sleeved on the piston ring, and the piston ring separates the upper cavity to form an upper piston cavity and a lower piston cavity; the inner ring of the tail end cover is provided with a second sealing ring, the lower end of the lower piston cavity extends inwards to form an annular bulge, and the inner ring of the annular bulge is provided with a third sealing ring; two oil pipe joints are arranged on the main shaft sleeve, one oil pipe joint is communicated with the upper piston cavity, and the other oil pipe joint is communicated with the lower piston cavity; the inside of sliding sleeve is equipped with the step hole, the roof in step hole is used for spacing the ejector pad.

Furthermore, a plurality of temperature detecting holes are formed in the bottom end of the main shaft sleeve, and the temperature detecting holes extend to one side of a bearing mounting position of the main shaft sleeve; the temperature detecting hole is used for installing a temperature sensor.

Further, a plurality of cooling grooves are uniformly arranged on the outer ring of the main shaft sleeve, and the cooling grooves are annular grooves; and adjacent cooling grooves form annular rings, and gaps are formed in one side of each annular ring and the other side of the adjacent annular ring.

One or more technical schemes in the oil-stain-proof main shaft structure provided by the embodiment of the invention at least have the following technical effects:

1. when the vaporous cutting fluid forming liquid enters the interior of the spindle sleeve from the assembly gap at the top end of the spindle, the cutting fluid entering through the inner wall of the spindle sleeve can be accumulated at the top of the convex ring, and when the cutting fluid is accumulated to a certain degree, the cutting fluid is discharged out of the spindle sleeve through the oil discharge hole; the cutting fluid entering the main shaft sleeve through the outside of the mandrel can be accumulated on the top surface of the oil baffle ring, and under the high-speed rotation of the mandrel, the cutting fluid on the oil baffle ring generates a larger centrifugal force, so that the cutting fluid is thrown on the inner wall of the main shaft sleeve and then flows to the top of the convex ring, and is discharged through an oil discharge hole; therefore, the cutting fluid is prevented from entering the bearing, the bearing in the main shaft is protected, and the service life of the bearing is ensured.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a perspective view of an oil contamination prevention spindle structure provided in an embodiment of the present invention.

Fig. 2 is a top view of the oil contamination prevention spindle structure according to the embodiment of the present invention.

Fig. 3 is a sectional view taken along line a-a of fig. 2.

Fig. 4 is a sectional view taken along line B-B of fig. 2.

Fig. 5 is a partially enlarged view of fig. 4.

Fig. 6 is a sectional view of an upper end portion of the spindle of the oil contamination prevention spindle structure according to the embodiment of the present invention.

Fig. 7 is a partially enlarged view of fig. 5.

Wherein, in the figures, the respective reference numerals:

100-main shaft sleeve 110-bearing 120-convex ring

130-oil discharge hole 141-oil pipe joint 142-oil pipe joint

150-temperature detecting hole 101-tail end cover 102-second sealing ring

103-annular boss 104-second seal ring 200-mandrel

210-oil retaining ring 220-conical part 230-pull rod

231-push block 201-clearance hole 300-sliding sleeve

301-piston ring 302-first sealing ring.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be illustrative of the embodiments of the present invention, and should not be construed as limiting the invention.

In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

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 embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.

In an embodiment of the present invention, as shown in fig. 1 to 7, the oil contamination prevention spindle structure includes a spindle sleeve 100 and a spindle 200, a bearing 110 is disposed in an inner hole of the spindle sleeve 100, and the spindle 200 passes through an inner ring of the bearing 110; an inwardly extending convex ring 120 is arranged on the inner ring of the spindle sleeve 100, the inner ring of the convex ring 120 and the outer ring of the mandrel 200 divide the interior of the spindle sleeve 100 into an upper cavity and a lower cavity, and the bearing 110 is located in the lower cavity; an oil discharge hole 130 is formed in the main shaft sleeve 100, the oil discharge hole 130 is communicated with the upper cavity, an oil blocking ring 210 is tightly sleeved on the mandrel 200, and the oil blocking ring 210 is located above the convex ring 120. In this embodiment, when mist-like cutting fluid forming liquid enters the spindle cover 100 from the fitting gap between the mandrel 200 and the tip end of the spindle cover 100, the cutting fluid entering through the inner wall of the spindle cover 100 is accumulated on the top of the convex ring 120, and when the cutting fluid is accumulated to a certain extent, the cutting fluid is discharged out of the spindle cover 100 through the oil discharge hole 130. The cutting fluid entering the spindle sleeve 100 through the outside of the mandrel 200 accumulates on the top surface of the oil baffle ring 210, and under the high-speed rotation of the mandrel 200, the cutting fluid on the oil baffle ring 210 generates a large centrifugal force, so that the cutting fluid is thrown to the inner wall of the spindle sleeve 100, flows to the top of the convex ring 120, and is discharged through the oil discharge hole 130; therefore, the cutting fluid is prevented from entering the bearing 110, so that the bearing 110 of the mandrel 200 is protected, and the service life of the bearing 110 is ensured.

Further, referring to fig. 3 to 7, the top surface of the convex ring 120 is a conical surface, a high point of the conical surface is close to the mandrel 200, and a root of the conical surface is connected to the spindle sleeve 100; the outer ring of the oil deflector 210 extends above the cone surface. In this embodiment, since the top surface of the protruding ring 120 is a tapered surface, the cutting fluid accumulated on the tapered surface flows down to the root of the protruding ring 120 along the tapered surface, thereby facilitating the discharge of the cutting fluid. The outer ring of the oil deflector 210 extends above the conical surface, and the cutting fluid can directly drop on the conical surface when the spindle 200 stops or rotates at a low speed.

Further, the clearance between the inner ring of the convex ring 120 and the outer ring of the mandrel 200 is 0.01-0.02 mm. Therefore, oil and water can be further prevented from entering the lower cavity.

Further, referring to fig. 3 and 4, the bottom end of the oil drain hole 130 is not higher than the lowest position of the top surface of the male ring 120. In this embodiment, when the cutting fluid is on the top surface of the convex ring 120, the cutting fluid can be directly discharged through the oil discharge hole 130, thereby preventing the accumulation of oil and water in the main shaft cover 200.

Further, the axis of the oil discharge hole 130 is flush with the top surface of the collar 120, or the axis of the oil discharge hole 130 intersects the lowest point of the collar 120. In this embodiment, the cutting fluid is more easily discharged.

Further, the oil deflector 210 is higher than the top surface of the oil drainage hole 130. In the present embodiment, when the spindle 200 rotates at a high speed, the cutting fluid is prevented from being directly thrown out of the oil drain hole 130 when being thrown out by the oil baffle 210; the oil cutting fluid is prevented from splashing.

Further, referring to fig. 3 to 6, the mandrel 200 is further provided with a conical portion 220, and a lower end of the conical portion 220 extends to a top of the oil deflector 210. In this embodiment, when the cutting fluid flows down from the outer ring of the spindle 200, the cutting fluid is guided by the conical portion 220 and flows directly to the oil deflector 210, and when the spindle rotates at a high speed, the conical portion 220 guides the cutting fluid, so that the cutting fluid is thrown out from the outer ring of the spindle 200.

Further, the convex ring 120 is integrally formed with the spindle cover 100.

Further, referring to fig. 3 to 6, a pull rod 230 is arranged inside the mandrel 200 and used for a clamping structure of the mandrel 200 for tool changing and tool pulling nail opening. Two sides of the upper end of the mandrel 200 are symmetrically provided with clearance holes 201, the upper end of the pull rod 230 is connected with a push block 231, and two ends of the push block 231 penetrate through the corresponding clearance holes 201. The upper end of the main shaft sleeve 100 is also provided with a tail end cover 101; the upper end cover of dabber 200 is equipped with sliding sleeve 300, sliding sleeve 300 stretches into in the upper chamber body, sliding sleeve 300's upper end is passed tail end lid 101, and sliding connection. A piston ring 301 is further arranged at one end, extending into the upper cavity, of the sliding sleeve 300, the piston ring 301 is in sliding fit with the inner wall of the spindle sleeve 100, a first sealing ring 302 is sleeved on the piston ring 301, and the piston ring 301 separates the upper cavity to form an upper piston cavity and a lower piston cavity; a second sealing ring 102 is arranged on the inner ring of the tail end cover 101, an annular bulge 103 extends inwards from the lower end of the lower piston cavity, and a third sealing ring 104 is arranged on the inner ring of the annular bulge 103; two oil pipe joints 141 and 142 are arranged on the main shaft sleeve 100, one oil pipe joint 141 is communicated with the upper piston cavity, and the other oil pipe joint 142 is communicated with the lower piston cavity; the sliding sleeve 300 is provided with a step hole 303 inside, and the top wall of the step hole 303 is used for limiting the push block 231. In this embodiment, when the mandrel 200 needs to replace a cutting tool, the oil pipe connected to the oil pipe joint 141 injects hydraulic oil into the upper piston cavity, so that the sliding sleeve 300 moves downward, the top wall of the stepped hole 303 is used for limiting the push block 231, and the pull rod 230 is pushed to move downward, so as to push the clamping structure for clamping a tool blind rivet to open, thereby never realizing tool changing.

Further, referring to fig. 4, a plurality of temperature detecting holes 150 are further disposed at the bottom end of the spindle sleeve 100, and the temperature detecting holes 150 extend to one side of the bearing installation position of the spindle sleeve 100; the temperature detecting hole 150 is used for installing a temperature sensor. In this embodiment, the temperature sensor extends into the temperature detecting hole 150, so that the temperature sensor can be closer to the bearing, thereby providing the accuracy of detecting the temperature of the bearing.

Further, a plurality of cooling grooves 106 are uniformly arranged on the outer ring of the spindle cover 100, and the cooling grooves 106 are annular grooves; an annular ring 107 is formed adjacent to the cooling groove 106, and one side of the annular ring 107 and the other side of the annular ring 107 adjacent to the annular ring 107 are provided with notches. In this embodiment, when the spindle cover 100 is assembled into the spindle base, the cooling groove 106 forms a cooling water path.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.