阅读说明：本技术 动密封式主轴箱 (Dynamic sealed spindle box ) 是由 汪洋 刘辉 汪传宏 王小玲 饶贝宁 于 2019-11-27 设计创作，主要内容包括：本发明涉及主轴箱技术领域,具体公开了一种动密封式主轴箱,包括箱体和密封单元,密封单元包括第一圆环、第二圆环和第三圆环,第一圆环固装在箱体的侧壁上,第一圆环和箱体侧壁之间夹紧有内橡胶垫圈,第二圆环、第三圆环均与主轴过盈配合,第一圆环开设有环形滑槽,第二圆环设有环形滑轨,第三圆环与第一圆环、第二圆环贴合,第一圆环的侧壁开设有环形咬合槽,第三圆环的侧壁设有环形咬合部,第三圆环内部开设有排水通道和倾斜设置且连通的第一、第二气道,排水通道与第一气道连通。本方案利用主轴转动时产生的离心力将气道内的冷却水和水雾凝结成的水珠经排水通道甩出,避免液体进入箱体内,延长主轴箱的使用寿命。(The invention relates to the technical field of spindle boxes, and particularly discloses a dynamic seal type spindle box which comprises a box body and a seal unit, wherein the seal unit comprises a first circular ring, a second circular ring and a third circular ring, the first circular ring is fixedly arranged on the side wall of the box body, an inner rubber gasket is clamped between the first circular ring and the side wall of the box body, the second circular ring and the third circular ring are in interference fit with a spindle, an annular sliding groove is formed in the first circular ring, an annular sliding rail is arranged on the second circular ring, the third circular ring is attached to the first circular ring and the second circular ring, an annular meshing groove is formed in the side wall of the first circular ring, an annular meshing part is formed in the side wall of the third circular ring, a drainage channel and a first air passage and a second air passage which are obliquely arranged and communicated are formed in the inner part of the third circular ring, and the drainage channel is communicated with. The centrifugal force that this scheme produced when utilizing the main shaft to rotate throws away the cooling water in the air flue and the drop of water that the water smoke condenses into through drainage channel, avoids in the liquid gets into the box, prolongs the life of headstock.)

1. Move sealed formula headstock, including the box, the box runs through there is the main shaft, is connected its characterized in that through bearing assembly between main shaft and the box: sealing units are arranged on two sides of the box body and comprise a first circular ring, a second circular ring and a third circular ring, the first circular ring penetrates through the main shaft and then is fixedly installed on the side wall of the box body, an inner rubber gasket is clamped between the first circular ring and the side wall of the box body, and the end part of the inner rubber gasket is abutted against the end face of the bearing assembly; the second ring and the third ring are in interference fit with the main shaft, the second ring is positioned in the ring of the first ring, the circumferential wall of the first ring close to the second ring is provided with a plurality of annular sliding grooves, the circumferential wall of the second ring close to the first ring is provided with a plurality of annular sliding rails in clearance fit with the annular sliding grooves, and the clearance value between the annular sliding rails and the annular sliding grooves is zero; the third circular ring is attached to the first circular ring and the second circular ring, a plurality of annular occlusion grooves are formed in the side wall of the first circular ring, a plurality of annular occlusion parts matched with the annular occlusion grooves are formed in the side wall of the third circular ring, and the gap value between the annular occlusion grooves and the annular occlusion parts is zero; a drainage channel, a first air passage and a second air passage which are obliquely arranged are formed in the third circular ring, the first air passage penetrates through the third circular ring, one end of the first air passage is connected with the annular meshing part, and the distance from one end, close to the bearing assembly, of the first air passage to the spindle is larger than the distance from one end, far away from the bearing assembly, of the first air passage to the spindle; the drainage channel is communicated with the first air passage, the second air passage is opposite to the first air passage in the inclination direction, one end of the second air passage is connected with the annular occlusion part, and the other end of the second air passage is communicated with the first air passage.

2. The dynamic seal type spindle box according to claim 1, characterized in that: the sealing unit further comprises a fourth ring, the fourth ring is in interference fit with the main shaft, and the fourth ring is located inside the box body; an elastic sealing ring is fixedly connected to the circumferential wall of the fourth ring, and the elastic sealing ring is abutted to the side wall of the box body.

3. The dynamic seal type spindle box according to claim 2, characterized in that: a plurality of sealing convex rings are integrally formed on the circumferential wall of the elastic sealing ring, and a plurality of annular grooves matched with the sealing convex rings are formed in the side wall of the box body.

4. A dynamically sealed spindle box according to claim 3, wherein: the elastic sealing ring is internally provided with a cavity.

5. The dynamic seal type spindle box according to claim 1, characterized in that: the sealing unit also comprises an inner sealing block, the inner sealing block is a trapezoidal column and a cylinder which are integrally formed, the inner sealing block is in interference fit with the main shaft, and the inner sealing block is arranged inside the box body; the lateral wall of box and the periphery wall clearance fit of interior seal piece, and the lateral wall of box and the clearance value of interior seal piece are zero.

6. The dynamic seal type spindle box according to claim 5, characterized in that: the lateral wall of box has seted up the runner, and the top and the interior sealing block of runner link up, and the lateral wall of box is run through to the bottom of runner, and the inner wall of runner is pasted and is had fibre drier piece.

7. The dynamic seal type spindle box according to claim 1, characterized in that: the first circular ring is fixedly installed on the outer side wall of the box body through screws.

8. The dynamic seal type spindle box according to claim 7, wherein: the outside of interior rubber packing ring is equipped with outer rubber packing ring, and the screw is located between outer rubber packing ring and the interior rubber packing ring.

9. The dynamically sealed spindle box according to claim 8, wherein: and a rubber strip is arranged between the outer rubber gasket and the inner rubber gasket and is connected with the inner rubber gasket and the outer rubber gasket.

10. The dynamically sealed spindle box of claim 9, wherein: and a drying agent bag is arranged between the outer rubber gasket and the inner rubber gasket, and a fiber drying agent is filled in the drying agent bag.

Technical Field

The invention relates to the technical field of spindle boxes, and particularly discloses a dynamic seal type spindle box.

Background

The main spindle box generally includes a box body, a main spindle penetrating the box body, a bearing assembly, a brake unit, a lubrication unit, and the like, and the main spindle is connected to a sidewall of the box body through the bearing assembly. One end of the main shaft is connected with the power source, the other end of the main shaft is provided with a clamp mounting part, and a part to be processed is fixed at the end of the main shaft through a clamp so as to process the part. Because in the course of working, the high-speed rotatory cutter and the friction heat production of spare part, consequently can generally water the purpose of cooling water in order to reach the cooling to the processing position, the in-process produces water smoke easily, and then, cooling water and water smoke get into the bearing assembly on this side headstock lateral wall easily, lead to bearing assembly impaired, have shortened bearing assembly's life.

Disclosure of Invention

The invention aims to provide a dynamic seal type main spindle box to solve the problem that cooling water and water mist easily enter a bearing assembly to cause damage to the bearing assembly.

In order to achieve the purpose, the basic scheme of the invention is as follows: the movable sealing type spindle box comprises a box body, a spindle penetrates through the box body, the spindle is connected with the box body through a bearing assembly, sealing units are arranged on two sides of the box body and comprise a first circular ring, a second circular ring and a third circular ring, the first circular ring penetrates through the spindle and then is fixedly installed on the side wall of the box body, an inner rubber gasket is clamped between the first circular ring and the side wall of the box body, and the end part of the inner rubber gasket abuts against the end face of the bearing assembly; the second ring and the third ring are in interference fit with the main shaft, the second ring is positioned in the ring of the first ring, the circumferential wall of the first ring close to the second ring is provided with a plurality of annular sliding grooves, the circumferential wall of the second ring close to the first ring is provided with a plurality of annular sliding rails in clearance fit with the annular sliding grooves, and the clearance value between the annular sliding rails and the annular sliding grooves is zero; the third circular ring is attached to the first circular ring and the second circular ring, a plurality of annular occlusion grooves are formed in the side wall of the first circular ring, a plurality of annular occlusion parts matched with the annular occlusion grooves are formed in the side wall of the third circular ring, and the gap value between the annular occlusion grooves and the annular occlusion parts is zero; a drainage channel, a first air passage and a second air passage which are obliquely arranged are formed in the third circular ring, the first air passage penetrates through the third circular ring, one end of the first air passage is connected with the annular meshing part, and the distance from one end, close to the bearing assembly, of the first air passage to the spindle is larger than the distance from one end, far away from the bearing assembly, of the first air passage to the spindle; the drainage channel is communicated with the first air passage, the second air passage is opposite to the first air passage in the inclination direction, one end of the second air passage is connected with the annular occlusion part, and the other end of the second air passage is communicated with the first air passage.

The working principle and the beneficial effects of the basic scheme are as follows: in this basic scheme, through the sealed of outer rubber packing ring and interior rubber packing ring for cooling water and the passageway that water smoke can get into the bearing assembly shifts to the junction of first ring and third ring, and the junction of first ring and second ring. However, the annular meshing groove and the annular meshing portion form a primary sealing structure, namely, a primary sealing structure is formed between the first circular ring and the third circular ring, and the annular sliding groove and the annular sliding rail form a secondary sealing structure, namely, a secondary sealing structure is formed between the first circular ring and the second circular ring, so that cooling water and water mist are difficult to enter the bearing assembly. Moreover, the first air passage obliquely arranged on the third ring can guide the cooling water entering the primary sealing structure into the first air passage and discharge the cooling water through the drainage channel under the action of centrifugal force; and even if the cooling water and the water mist enter the first-stage sealing structure, the cooling water and the water mist are thrown into the second air passage under the action of centrifugal force and are discharged through the drainage passage before entering the second-stage sealing structure. Therefore, this basic scheme increases substantially the degree of difficulty that cooling water and water smoke got into the bearing subassembly, effectively avoids cooling water and water smoke to get into in the bearing subassembly promptly, prolongs bearing subassembly's life.

Optionally, the sealing unit further includes a fourth ring, the fourth ring is in interference fit with the spindle, and the fourth ring is located inside the box body; an elastic sealing ring is fixedly connected to the circumferential wall of the fourth ring, and the elastic sealing ring is abutted to the side wall of the box body.

One side of keeping away from first ring through fourth ring and elastic sealing ring seal bearing subassembly improves the sealed degree to bearing assembly.

Optionally, a plurality of sealing convex rings are integrally formed on the circumferential wall of the elastic sealing ring, and a plurality of ring grooves matched with the sealing convex rings are formed on the side wall of the box body.

The sealing convex ring and the annular groove form a bent inner sealing structure, so that the sealing effect is improved.

Optionally, a cavity is opened inside the elastic sealing ring.

The elastic sealing ring is internally provided with a cavity so as to improve the deformation capacity of the elastic sealing ring and facilitate better use.

Optionally, the sealing unit further comprises an inner sealing block, the inner sealing block is a trapezoidal column and a cylinder which are integrally formed, the inner sealing block is in interference fit with the spindle, and the inner sealing block is arranged inside the box body; the lateral wall of box and the periphery wall clearance fit of interior seal piece, and the lateral wall of box and the clearance value of interior seal piece are zero.

The lateral wall of box and interior seal block clearance fit form special-shaped inner seal structure, realize keeping away from the sealed of one side of first ring to bearing assembly, improve the sealed degree to bearing assembly.

Optionally, a flow channel is formed in the side wall of the box body, the top end of the flow channel is connected with the inner sealing block, the bottom end of the flow channel penetrates through the side wall of the box body, and a fiber desiccant sheet is adhered to the inner wall of the flow channel.

Because the inner sealing block is in interference fit with the main shaft, the inner sealing block rotates, water mist is thrown into the flow channel under the action of centrifugal force and gravity after entering the inner sealing structure, the fiber drying agent sheets in the flow channel absorb the water mist, the dryness of the inner sealing structure is kept, and the water mist is prevented from entering the bearing assembly.

Optionally, the first ring is fixedly mounted on the outer side wall of the box body through screws.

The first ring is convenient to disassemble and the inner rubber gasket is convenient to replace.

Optionally, an outer rubber gasket is arranged on the outer side of the inner rubber gasket, and the screw is located between the outer rubber gasket and the inner rubber gasket.

Set up outer rubber gasket and interior rubber gasket, carry out dual waterproof function, further avoid cooling water and water smoke to get into in the bearing subassembly.

Optionally, a rubber strip is arranged between the outer rubber gasket and the inner rubber gasket, and the rubber strip is connected with the inner rubber gasket and the outer rubber gasket.

When the inner rubber gasket is connected with the outer rubber gasket, a worker can conveniently take and place the inner rubber gasket and the outer rubber gasket at one time, and the operation is convenient.

Optionally, a desiccant bag is arranged between the outer rubber gasket and the inner rubber gasket, and a fiber desiccant is filled in the desiccant bag.

The fibrous desiccant in the desiccant packet is capable of absorbing moisture so that the air between the outer rubber gasket and the inner rubber gasket remains dry, adding a protective layer to prevent cooling water and water mist from entering the bearing assembly.

Drawings

FIG. 1 is a schematic structural diagram of a first embodiment of a dynamic seal type spindle box according to the present invention;

FIG. 2 is a longitudinal cross-sectional view of the case;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is a longitudinal sectional view of a housing in a second embodiment of a dynamically sealed spindle head according to the present invention;

FIG. 5 is an enlarged view of portion B of FIG. 4;

FIG. 6 is a longitudinal sectional view of a third case of the embodiment of the movable sealed spindle head of the present invention;

fig. 7 is an enlarged schematic view of portion C of fig. 6.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the drying device comprises a box body 1, a main shaft 2, a bearing assembly 3, a first ring 4, a second ring 5, a third ring 6, screws 7, an outer rubber gasket 8, an inner rubber gasket 9, a drying agent bag 10, an annular slide rail 11, an annular meshing part 12, a primary sealing structure 13, a secondary sealing structure 14, a drainage channel 15, a first air channel 16, a second air channel 17, a fourth ring 18, an elastic sealing ring 19, a sealing convex ring 20, a cavity 21, an inner sealing structure 22, an inner sealing block 23, a flow channel 24 and a fiber drying agent sheet 25.