CN214869039U

CN214869039U - Machine tool

Info

Publication number: CN214869039U
Application number: CN202120398931.7U
Authority: CN
Inventors: 陈云法
Original assignee: Zhejiang Shuangzheng Technology Co ltd
Current assignee: Zhejiang Shuangzheng Technology Co ltd
Priority date: 2020-07-15
Filing date: 2021-02-06
Publication date: 2021-11-26
Anticipated expiration: 2031-02-06
Also published as: CN111702550A

Abstract

The utility model provides a machine tool belongs to mechanical equipment technical field, a serial communication port, include: a frame; the workbench main shaft extends along the horizontal direction and is rotatably arranged on the rack; the main shaft supporting sleeve is cylindrical, is fixedly arranged on the rack and is sleeved on the main shaft of the workbench; and the center of the workbench is fixedly arranged on a workbench main shaft, wherein an annular sealing convex part is arranged on the end surface of the workbench close to the workbench main shaft, the main shaft supporting sleeve is inserted into the sealing convex part, a gas storage cavity is arranged between the end surface of the main shaft supporting sleeve and the end surface of the workbench, a sealing ring and a dust ring are arranged between the outer wall of the main shaft supporting sleeve and the inner wall of the sealing convex part, the sealing ring is positioned on one side close to the gas storage cavity, a gas passing channel is arranged between the sealing ring and the gas storage cavity, and a sealing lip which enables the sealing ring to be matched with the dust ring and the wall surface of the main shaft supporting sleeve for sealing when the gas storage cavity is inflated is arranged on the sealing ring.

Description

Machine tool

Technical Field

The utility model belongs to the technical field of mechanical equipment, concretely relates to lathe.

Background

The multi-station combined machine tool can process the metal blank into a required finished workpiece by clamping the metal blank at one time. The multi-station combined machine tool is provided with a plurality of stations and power heads corresponding to the stations, a metal blank is rotated to the stations through a workbench, and then the power heads perform machining procedures such as drilling, boring, turning, chamfering, tapping, milling, drawing or threading on the metal blank.

The metal blanks are clamped on the workbench through a plurality of clamps which are distributed circumferentially, each clamp is provided with an oil cylinder which provides clamping force, and each oil cylinder distributes external hydraulic oil through an oil separator. In the machining process, a large amount of dust can be generated and adhered to the synchronous clamp of the workbench, and metal scraps wrapped by cooling liquid for scouring metal blanks can be adhered to the synchronous clamp to corrode the synchronous clamp, so that the clamping and positioning accuracy of workpieces can be affected. Therefore, the machine tool is provided with a flushing mechanism, and the synchronous clamp is flushed by air flow when the workbench stops rotating. According to the integrated workbench spindle and workbench structure of the waterwheel type special plane disclosed in the patent document (application number: 201720014689.2), the rear end cover, the workbench spindle, the workbench end cover and the workbench are all provided with medium channels, the medium channels are used for transporting high-pressure air or lubricating oil, the high-pressure air is used for purging to ensure cleaning of a workpiece machining face and a synchronous clamp mounting position, the lubricating oil is used for lubricating, the medium channels are sealed through two oil seals, and the inner space of the workbench spindle is sealed through three oil seals.

The structure is sealed through the oil seal, but because the main shaft of the workbench rotates relative to the frame, the oil seal arranged between the main shaft of the workbench and the frame can prevent dust and cooling liquid (water or oil) wrapped with metal chips from entering a medium channel when the workbench rotates, and can stop rotating on the workbench to seal the medium channel gas flushed by the synchronous clamp. The oil seal needs to have a higher sealing grade when sealing gas with certain air pressure, a larger pressing force is provided between the oil seal and the workbench main shaft at the moment, and the workbench main shaft rotates to generate larger abrasion on the oil seal, so that the service life is influenced, namely, the sealing performance and the service life are difficult to be considered.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, a machine tool is provided, the utility model adopts the following technical scheme:

the utility model provides a machine tool, a serial communication port, include: a frame; the workbench main shaft extends along the horizontal direction and is rotatably arranged on the rack; the main shaft supporting sleeve is cylindrical, is fixedly arranged on the rack and is sleeved on the main shaft of the workbench; and the center of the workbench is fixedly arranged on a workbench main shaft, wherein an annular sealing convex part is arranged on the end surface of the workbench close to the workbench main shaft, the main shaft supporting sleeve is inserted into the sealing convex part, a gas storage cavity is arranged between the end surface of the main shaft supporting sleeve and the end surface of the workbench, a sealing ring and a dust ring are arranged between the outer wall of the main shaft supporting sleeve and the inner wall of the sealing convex part, the sealing ring is positioned on one side close to the gas storage cavity, a gas passing channel is arranged between the sealing ring and the gas storage cavity, and a sealing lip which enables the sealing ring to be matched with the dust ring and the wall surface of the main shaft supporting sleeve for sealing when the gas storage cavity is inflated is arranged on the sealing ring.

The utility model provides a lathe can also have such characteristic, and wherein, the inner wall of sealed convex part has dust ring mounting groove and the sealing washer mounting groove of adjacent setting, and the dust ring mounting groove sets up the one side of keeping away from the gas storage chamber at the sealing washer mounting groove, and the dust ring setting is in the dust ring mounting groove, and the sealing washer setting is in the sealing washer mounting groove, crosses gas passage intercommunication gas storage chamber and sealing washer mounting groove.

The utility model provides a lathe can also have such characteristic, and wherein, the internal diameter of sealing washer is greater than the main shaft and supports the external diameter of the part in the sealed protruding portion of cover insert table.

The utility model provides a lathe can also have such characteristic, and wherein, the sealing washer is the star type sealing washer, and this star type sealing washer has and is the annular and is close to first lip and the second lip that the dust ring set up, and first lip supports the direction slope extension of cover to being close to the main shaft, and the second lip supports the direction slope extension of cover to keeping away from the main shaft.

The utility model provides a lathe can also have such characteristic, and wherein, the border that the inner circle of dust ring is close to the sealing washer is provided with first chamfer, and the border that the sealing washer mounting groove is close to the dust ring mounting groove is provided with the second chamfer, when the gas storage chamber is aerifyd, first lip embedding first chamfer, and second lip embedding second chamfer seals simultaneously.

The utility model provides a lathe can also have such characteristic, and wherein, star type sealing washer has the third lip and the fourth lip that are the annular and are close to the terminal surface setting of workstation, and the third lip supports the direction slope extension of cover to being close to the main shaft, and the fourth lip supports the direction slope extension of cover to keeping away from the main shaft.

The utility model provides a lathe can also have such characteristic, and wherein, the thickness of sealing washer is less than the width of dust ring to the sealing washer mounting groove.

The utility model provides a lathe can also have such characteristic, wherein, the dust ring has the clearance between the periphery wall of the one end that is close to the sealing washer and main shaft support cover, and the one side that the sealing washer was kept away from to the dust ring has the lip limit, and the one end that the gas storage chamber was kept away from to sealed convex part is provided with the gland for carry out spacing messenger's lip limit to the dust ring and press on the periphery wall of main shaft support cover, the dust ring mounting groove is provided with the seal groove towards the terminal surface of dust ring, is provided with sealed the pad in the seal groove.

The utility model provides a machine tool, can also have such characteristic, wherein, the main shaft supports the cover including bearing frame and bearing cap, be equipped with first bearing between bearing frame and the workstation main shaft, the bearing cap sets up and supports in the one end that the cover main part is close to the workstation inserts sealed convex part at the main shaft, form the gas storage chamber between bearing cap and the workstation, be provided with the skeleton oil blanket between bearing cap inboard and the workstation main shaft, dust ring and sealing washer set up between bearing cap and sealed convex part, the external diameter of bearing cap is less than the internal diameter of sealed convex part, form gas channel between the periphery wall of bearing cap and the inner wall of sealed convex part.

The utility model provides a lathe can also have such characteristic, and wherein, be provided with the inlet channel in external air supply of intercommunication and gas storage chamber on the perisporium of main shaft support cover, the workstation is close to the outlet channel who is provided with intercommunication gas storage chamber and workstation on the end wall in gas storage chamber.

Utility model with the functions and effects

According to the utility model provides a machine tool, support cover and workstation including frame, workstation main shaft, main shaft. The workbench main shaft extends along the horizontal direction and is rotatably arranged in the rack in a penetrating mode, the main shaft supporting sleeve is sleeved outside the workbench main shaft, the center of the workbench is fixed to one end of the workbench main shaft, and an annular sealing convex portion is arranged at the end portion of the workbench main shaft and used for installing the main shaft supporting sleeve. A gas storage cavity is formed between the end face of the main shaft supporting sleeve and the sealing convex portion, a sealing ring and a dustproof ring are arranged between the outer wall of the main shaft supporting sleeve and the inner wall of the sealing convex portion, and the sealing ring is located on one side close to the gas storage cavity. When the gas storage cavity is inflated, the sealing lip on the sealing ring can be unfolded and pressed on the dustproof ring, and the dustproof ring and the main shaft supporting sleeve are sealed. When the air storage cavity is in an uninflated state, the dust ring seals and prevents dust for the main shaft support sleeve and the workbench, and the sealing ring is not basically sealed at the moment, so that the abrasion between the sealing ring and the workbench due to the rotation of the main shaft support sleeve is avoided; and when the workstation stopped rotating, the gas storage chamber was aerifyd, and the sealing washer seals main shaft support cover and workstation because atmospheric pressure, and gaseous can carry out blowing and sweeping to anchor clamps through the workstation. The dust ring prevents outside dust from entering the workbench, so that the clamping and positioning accuracy of workpieces is influenced, the sealing ring ensures the sealing between the workbench and the main shaft support sleeve when the scavenging gas enters the workbench, and the metal chips swept by the scavenging gas and the cooling liquid wrapped with the metal chips are prevented from entering the workbench. And the dustproof ring and the sealing ring respectively play a role when the gas storage cavity is inflated and not inflated, so that the abrasion of the sealing ring is reduced while the sealing effect is ensured, and the service lives of the dustproof ring and the sealing ring are prolonged.

Drawings

Fig. 1 is a schematic perspective view of a machine tool according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional structure diagram of a machine tool according to an embodiment of the present invention;

fig. 3 is a schematic sectional view a of the main shaft support sleeve, the workbench main shaft and the workbench according to the embodiment of the present invention;

fig. 4 is a schematic cross-sectional structural diagram b of the main shaft support sleeve, the workbench main shaft and the workbench according to the embodiment of the present invention;

fig. 5 is an enlarged view of the structure at a in fig. 4.

Detailed Description

The invention aims to solve the problems in the prior art, and provides a machine tool which is used for solving the problem that how to ensure the sealing effect and prolong the service life of the existing machine tool.

The purpose of the invention can be realized by the following technical scheme: a machine tool comprises a frame, a cylindrical main shaft support sleeve fixed on the frame, a workbench main shaft penetrating in the main shaft support sleeve and a workbench fixed at one end of the workbench main shaft, wherein an annular sealing convex part is arranged on the side surface of the workbench in the circumferential direction, the machine tool is characterized in that the end part of the main shaft support sleeve is inserted into the inner side of the sealing convex part and forms an air storage cavity with the side surface of the workbench, a sealing ring and a dust ring capable of preventing dust in the air storage cavity are sequentially arranged between the sealing convex part and the main shaft support sleeve from the air storage cavity to the outside, a limiting part which is formed by concave and/or convex and can limit the sealing ring and the dust ring is arranged between the sealing convex part and the main shaft support sleeve, when the air storage cavity is in an uninflated state, the dust ring seals the space between the sealing convex part and the main shaft support sleeve more tightly than the sealing ring, the sealing ring has a sealing lip on its circumference which can be spread apart and pressed against the spindle support sleeve and/or the sealing lip when the air reservoir is inflated.

The air storage cavity is formed by inserting the end part of the main shaft support sleeve into the inner side of the sealing convex part, so that a dust ring between the sealing convex part and the outer peripheral wall of the main shaft support sleeve can seal a gap between the main shaft support sleeve and the sealing convex part, the air storage cavity is communicated with an external air source, when the workbench stops rotating, the air in the air storage cavity needs to be inflated, the air in the air storage cavity enters the workbench to wash the clamp, when the workbench rotates, the air stops inflating, the dust ring is used for preventing dust from entering the air storage cavity, particularly, the dust ring plays a role of dust prevention when the workbench rotates, when the air is inflated in the air storage cavity, the dust ring is difficult to well seal the air, leakage is easy to occur, and due to the existence of the dust ring between the sealing convex part and the main shaft support sleeve, the conventional means of technicians in the field naturally increases the sealing pressure between the dust ring and the main shaft support sleeve, thereby increasing the sealing performance, the inner side of the dust ring is provided with the sealing ring and is limited by the limiting part, the sealing ring is made of flexible and deformable conventional materials, such as a rubber ring, a silica gel ring and the like, when the gas storage cavity is inflated, gas can reach the sealing ring through a gap between the main shaft supporting sleeve and the sealing convex part and act on the end face of the sealing ring and the sealing lip part, when the sealing ring is arranged on the sealing convex part under the action of gas pressure, the sealing lip part can be pressed on the outer peripheral wall of the main shaft supporting sleeve to play a sealing role, when the sealing ring is arranged on the main shaft supporting sleeve, the sealing lip part can be pressed on the inner peripheral wall of the sealing convex part to play a sealing role, the higher the gas pressure is, the tighter the sealing effect is better, the end face of the sealing ring is also acted by the gas pressure, certain radial expansion can also occur under the gas pressure, and the sealing lip part is assisted to be pressed on the outer peripheral wall of the main shaft supporting sleeve or the inner peripheral wall of the sealing convex part, the dust ring and the sealing ring are arranged at the same time, the inflation cavity is not inflated when the workbench rotates, the sealing ring basically does not play a sealing role, the sealing ring is prevented from being abraded due to rotation friction, the service life is prolonged, the dust ring plays a dustproof role mainly by the dust ring, and when the workbench stops rotating and inflates the inflation cavity, the sealing ring realizes sealing through the existing gas in the gas storage cavity, so that the dust ring and the sealing ring respectively play their roles, sealing in different process stages is realized, and the sealing effect is ensured; further, when the gas storage chamber is in the uninflated state, that is to say when the workstation is in the rotation state, need prevent dust this moment, for this dust ring to sealed convex part and main shaft support between the cover than the sealing ring to sealed convex part and main shaft support between the cover inseparabler, that is to say only need the dust ring to exert basic dustproof effect, this sealed degree demand is less to the wearing and tearing of dust ring, and the sealing washer does not exert sealed effect basically, has avoided the sealing washer wearing and tearing to appear, thereby improve the life of dust ring and sealing washer.

In the above machine tool, the limit portion includes a first step formed by recessing the inner edge of the end face of the sealing convex portion and a second step formed by recessing the inner edge of the step face of the first step, the dust ring is fixed on the first step, and the seal ring is located on the second step. The structure of first step and second step makes and keeps away from workstation one side and is the opening form, and the dust ring is installed earlier to the sealing washer of being convenient for, installs again, and the dust ring can fix a position through the gland, and the sealing washer then carries on spacingly through the step face of dust ring and second step to guarantee the stability of dust ring and sealing washer when the workstation is rotatory and the gas storage chamber is aerifyd.

In the above machine tool, the inner diameter of the seal ring is larger than the outer diameter of the inner portion of the seal convex portion into which the spindle support sleeve is inserted. The sealing washer is in natural state when the gas storage chamber does not aerify, and the internal diameter is greater than the external diameter that its cover established position main shaft and supports the cover, and consequently the sealing washer can rotate along with the workstation when the workstation rotates, can not support the cover with the main shaft and produce the friction, mainly leans on the dust ring to play dustproof effect this moment to reduce the turning resistance of workstation, make the rotation more smooth, certainly also can reduce the wearing and tearing to the sealing washer, thereby improve its life on guaranteeing dirt-proof basis.

In the machine tool, the sealing ring is positioned between the end face of the dust ring and the step face of the second step, and the thickness of the sealing ring is smaller than the distance between the end face of the dust ring and the step face of the second step. The sealing washer carries on spacingly through the dust ring, form the space around the sealing washer simultaneously, when aerifing the chamber and aerifing, gas can push away the sealing washer to the dust ring earlier, thereby make a way out in the one side that is close to the gas storage chamber, make gas get into second step department and abundant, even act on the sealing washer terminal surface, the sealing washer is supporting deformation and the radial expansion that can be even after leaning on the dust ring, thereby seal between sealed convex part and the main shaft support cover after the workstation stops rotating, and then improve the sealed effect of gas storage chamber.

In the above machine tool, the seal ring has two seal lips projecting toward the outer peripheral wall of the spindle support sleeve, one of the seal lips is inclined in a direction toward the table, and the other seal lip is inclined in a direction away from the table. When the sealing ring enters gas, the sealing ring and the sealing lip part can be acted on, the sealing lip part inclined towards the workbench can be expanded inwards along the radial direction under the action of air pressure, namely, the sealing lip part is compressed on the peripheral wall of the main shaft supporting sleeve after being expanded and deformed to form sealing, the sealing ring is pressed against the dustproof ring, and meanwhile, the sealing lip part inclined towards the direction far away from the workbench is compressed between the dustproof ring and the main shaft supporting sleeve, so that a gap between the dustproof ring and the main shaft supporting sleeve is sealed, and the sealing ring has a higher sealing effect.

In the above machine tool, a gap is provided between the inner peripheral wall of the dust seal and the outer peripheral wall of the spindle support sleeve, and a lip is circumferentially provided on the outer end surface of the dust seal and pressed against the outer peripheral wall of the spindle support sleeve. Have the clearance between dust ring internal perisporium and the main shaft support cover periphery wall to reduce wear when the workstation is rotatory, it just can realize better dustproof effect through the lip limit, and above-mentioned clearance then is used for crowding into to the inclined seal lip of dust ring when gas fills, and the seal lip is crowded into between dust ring internal perisporium and the main shaft support cover periphery wall, realizes better sealed effect.

In the above machine tool, the seal ring further includes two seal lips circumferentially arranged in a ring shape and protruding toward the side wall of the second step, one of the seal lips is inclined in a direction toward the table, and the other seal lip is inclined in a direction away from the table. In a similar way, when gas is filled, one sealing lip can be deformed along the radial outward expansion and then is pressed tightly on the side wall of the second step to realize sealing, and the other sealing lip can seal between the dust ring end face and the step face of the first step, so that a better sealing effect is achieved.

In the machine tool, the inner edge of the inner end face of the dust ring is circumferentially provided with a first chamfer, and the inner edge of the step face of the first step is circumferentially provided with a second chamfer. When gas is filled, the two sealing lips inclined to the workbench are radially expanded and are respectively pressed on the peripheral wall of the main shaft support sleeve and the side wall of the first step, the two sealing lips inclined to the dust ring are respectively extruded into the first chamfer and the second chamfer, the first chamfer and the second chamfer both play a role in guiding the sealing lips during deformation and limiting the sealing, and therefore the sealing between the waterproof ring and the main shaft support sleeve and between the waterproof ring and the sealing convex part is better, and the sealing effect is improved.

In the machine tool, the main shaft support sleeve comprises a cylindrical base body and an annular bearing cover which is fixed at the end part of the base body, the bearing cover is inserted into the inner side of the sealing convex part and forms the gas storage cavity with the workbench, a framework oil seal is arranged between the inner side of the bearing cover and the main shaft of the workbench, and a dust ring and a sealing ring are sleeved on the outer side of the bearing cover. The main shaft of the workbench penetrates through the base body and the bearing cover and is connected through the bearing, and the dustproof and sealing between the bearing cover and the sealing convex part are realized through the dustproof ring and the sealing ring.

In the above machine tool, the outer diameter of the bearing cap is smaller than the inner diameter of the sealing convex portion, so that a gas passing channel for communicating the gas storage cavity with the second step position is formed between the outer peripheral wall of the bearing cap and the inner peripheral wall of the sealing convex portion. Different from the present clearance that reduces as far as possible between main shaft support cover periphery wall and the sealed convex part internal perisporium in order to realize sealed, this application will increase the clearance between the two instead in order to form the gas channel, seals through letting gas outflow gas storage chamber supplementary sealing washer to make it have higher sealed effect when needs.

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings and examples.

< example >

The embodiment provides a machine tool, which is used for machining a workpiece to be machined after a power head is installed.

Fig. 1 is a schematic perspective view of a machine tool according to an embodiment of the present invention, and fig. 2 is a schematic sectional view of the machine tool according to an embodiment of the present invention.

As shown in fig. 1 to 2, in the present embodiment, the machine tool 100 is a water wheel type machine tool. The machine tool 100 includes a frame 1, a spindle support sleeve 2, a table spindle 3, a table 4, and an oil protective sleeve 5.

The frame 1 has a rectangular shape with two side plate portions 11 arranged in parallel and opposed to each other in the vertical direction.

The main shaft support sleeve 2 is inserted into the side plate 11 of the frame 1, and includes a cylindrical bearing seat 21 and an annular bearing cover 22. The bearing housing 21 is provided at one end of the bearing cover 22 near the center of the housing 1.

The workbench main shaft 3 is fixed in the bearing seat 21 in a penetrating manner along the horizontal direction, and a bearing 24 is installed between the workbench main shaft 3 and the bearing seat 21, so that the workbench main shaft 3 can rotate. One of the bearings 24 is provided at one end of the bearing housing 21 of the main shaft support housing near the bearing cap 22, and the bearing cap 22 is provided at the outer periphery of the bearing 24.

The table 4 is disposed between the side plate portions 11 at one end of the table main shaft 3 near the center of the frame 1. The end surface of the table 4 close to the table main shaft 3 is provided with a sealing convex portion 41 in an annular shape. The workbench 4 rotates along with the workbench spindle 3, and a plurality of clamps are distributed on the circumference of the workbench 4.

The bearing cap 22 is disposed in the seal projection 41, and an end surface of the bearing cap 22 close to the table 4 is spaced apart from the table 4. The bearing housing 21 is provided at an end of the bearing cover 22 remote from the table 4, and an axis thereof coincides with the rotational axis, and an end of the bearing housing 21 remote from the table 4 is fixed to the side plate portion 11.

The outer diameter of the bearing cap 22 is smaller than the inner diameter of the sealing protrusion 41, that is, the outer diameter of the spindle support sleeve 2 inserted into the sealing protrusion 31 is smaller than the inner diameter of the sealing protrusion 41. An annular framework oil seal 23 is further arranged between the inner wall of one end, away from the bearing seat 21, of the bearing cover 22 and the outer peripheral wall of the workbench main shaft 3.

The end face of the working table 4, namely the face of the working table 4 close to the main shaft support sleeve 2, the inner wall of the sealing convex part 41, the end face of the bearing cover 22, the end face of the framework oil seal 23 and the outer wall of the working table main shaft 3 are combined to form an air storage cavity 6.

Fig. 3 is the sectional structure schematic diagram a of the utility model discloses after main shaft supports cover, workstation main shaft and the workstation cooperation, fig. 4 is the utility model discloses after main shaft supports cover, workstation main shaft and the workstation cooperation sectional structure schematic diagram b. Fig. 3 and 4 are two different angle cross-sectional views.

As shown in fig. 3, an air inlet passage 211 is opened on the peripheral wall of the bearing seat 21, and the air inlet passage 211 has a first passage which is communicated with each other and extends from the outer wall of the bearing seat 21 along the radial direction of the bearing seat 21 and a second passage which extends along the axial direction of the bearing seat 21 to the end surface of the bearing seat 21 close to the bearing cover 22; the peripheral wall of the bearing cap 22 is provided with a ventilation channel 221 extending to the air storage chamber 6 along the axial direction of the bearing cap 22 at a position corresponding to the second channel, two ends of the ventilation channel 221 respectively penetrate through two end faces of the bearing cap 22, and the air inlet channel 611, the ventilation channel 221 and the air storage chamber 6 are communicated. One end of the first channel of the air inlet channel 211 penetrating to the outer peripheral surface of the bearing seat 21 is connected with an external air source.

An air outlet channel 42 is formed in the side wall, close to the air storage cavity 6, of the workbench 4, the air outlet channel 42 extends along the axial direction of the workbench 4 and is communicated with the air storage cavity 6 and the inner cavity of the workbench 4. When the workbench stops rotating, an external air source leads air into the air storage cavity 6 through the air inlet channel 211 and the air vent channel 221 on the main shaft support sleeve 2, and then the air enters the workbench 4 from the air storage channel 42 to clean the synchronous clamp.

Fig. 5 is an enlarged view of the structure at a in fig. 4.

As shown in fig. 5, the sealing convex portion 41 is provided with a dust ring mounting groove 411 and a sealing ring mounting groove 412, and the dust ring mounting groove 411 is located on a side away from the air storage chamber 6. The depth of the dust ring mounting groove 411 is greater than that of the seal ring mounting groove 412. Because the outer diameter of the bearing cap 22 is smaller than the inner diameter of the sealing convex part 41, a gap is formed between the outer wall of one end of the bearing cap 22 close to the end surface of the workbench and the inner wall of the sealing convex part 41, namely, the air passing channel 9 is formed, and the air passing channel 9 is communicated with the air storage cavity 6 and the sealing ring mounting groove 412.

A sealing ring 7 and a dust ring 8 are sequentially arranged between the sealing convex part 41 and the main shaft supporting sleeve 2 from the air storage cavity 6 to the outside. The seal ring 7 is disposed in the seal ring mounting groove 412, and the dust ring 8 is disposed in the dust ring mounting groove 411.

The dust ring 8 is made of wear-resistant material and comprises a lip edge 81 and a dust ring main body 83 which are annular, and the lip edge 81 is arranged at one end of the dust ring main body 83 far away from the air storage cavity 6. The inner diameter of the lip edge 81 gradually increases from the end surface far away from the gas storage cavity 6 to the direction close to the gas storage cavity 6, the outer diameter of the lip edge 81 gradually increases from the end surface far away from the gas storage cavity 6 to the direction close to the gas storage cavity 6, and the thickness of the lip edge 81 also gradually increases from the end surface far away from the gas storage cavity 6 to the direction close to the gas storage cavity 6. The outer edge of lip 81 with a smaller thickness abuts against the outer peripheral surface of bearing cover 22, i.e. the inner peripheral surface of the end of lip 81 remote from the air storage chamber is closely attached to the outer wall of bearing cover 22. Lip 81 has a clearance with the outer peripheral surface of bearing 22 except for the edge that abuts the outer peripheral surface of bearing cap 22. The outer peripheral surface of the dust seal body 83 is in close contact with the wall surface of the dust seal installation groove 411, and the inner diameter of the dust seal body 83 is larger than the outer diameter of the bearing cover 22, that is, a gap is provided between the inner peripheral surfaces of the portions where the dust seal body 83 abuts against the lip 81 and the bearing cover 22 and the outer peripheral wall of the bearing cover 22.

The dust ring main body 83 is close to the air storage cavity 6 and the bearing cover 22, that is, the inner end surface of the dust ring 8 is close to the circumferential direction of the edge of the air storage cavity 6 and is further provided with a first chamfer 82.

An annular gland 416 is further fixed on one end of the sealing convex part 41 far away from the air storage cavity 6, a sealing groove 414 extending along the axial direction of the sealing convex part 41 is further arranged on the end face of the dust seal installation groove 411 facing the dust seal 8, and an O-shaped ring 415, namely a sealing gasket, is arranged in the sealing groove 414. Gland 416 and dust ring mounting groove 411 hug closely mutually towards the terminal surface of dust ring 8 and the terminal surface of dust ring main part 83, carry on spacingly to dust ring 8, and gland 416 compresses tightly dust ring 8 and realizes fixing on the surface of sealing washer mounting groove 411 promptly, compresses tightly O shape circle 415 simultaneously and realizes sealing. The edge of the sealing ring installation groove 412 close to the dust ring 8 is provided with a second chamfer 413.

The first chamfer 82 and the second chamfer 413 are both rounded chamfers.

The sealing ring 7 is annular and is made of deformable flexible materials, and in the embodiment, the sealing ring 7 is a star-shaped sealing ring and is made of rubber materials. The seal ring 7 has four identical and protruding annular seal lips in the circumferential direction, namely a first lip 71, a second lip 72, a third lip 73, and a fourth lip 74. The cross section of the sealing ring 7 is in a shape of a four-corner edge with central symmetry by the sealing lips, and the side surface of each sealing lip is in smooth transition with the outer surface of the sealing ring 7, so that an arc-shaped concave surface is formed between every two adjacent sealing lips. When the sealing ring 7 receives air pressure, the sealing lip part is deformed and expands outwards.

The first lip 71 and the second lip 72 are protruded in a direction approaching the dust seal 8, and the first lip 71 is inclined in a direction approaching the bearing cap 22, that is, the first lip 71 is protruded in a direction of the first chamfer 82; the second lip 72 is inclined in a direction approaching the inner wall of the packing installation groove 412, that is, the second lip 72 projects in a direction of the second chamfer 413.

The third lip 73 and the fourth lip 74 project in a direction toward the end surface of the table 4, the third lip 73 is inclined in a direction toward the bearing cap 22, that is, the third lip 73 projects in a direction toward the air passage 9, and the fourth lip 74 is inclined in a direction away from the bearing cap 22, that is, the fourth lip 74 projects toward the inner corner of the seal ring mounting groove 412.

When the air reservoir 6 is not inflated, i.e. the sealing ring 7 is not subjected to air pressure, the inner diameter of the sealing ring 7 is larger than the outer diameter of the bearing cap 22 inside the sealing protrusion 41, i.e. the inner diameter of the sealing ring 7 is larger than the outer diameter of the inner portion of the spindle support sleeve 2 inserted into the sealing protrusion 41.

The width of the dust ring 8 along the radial direction of the bearing cover 22 is greater than the depth of the seal ring mounting groove 411, so that the dust ring 8 protrudes out of the side wall of the seal ring mounting groove 412, the seal ring 7 is positioned in the seal ring mounting groove 412, the seal ring 7 is positioned between the end surface of the seal ring mounting groove 412 and the end surface of the dust ring 8, the inner diameter of the seal ring 7 is greater than the outer diameter of the inner part of the main shaft support sleeve 2 inserted into the sealing convex part 41, therefore, the workbench 4 can drive the seal ring 7 to rotate when rotating, friction between the seal ring 7 and the bearing cover 22 cannot occur, the thickness of the seal ring 7 is smaller than the distance between the end surface of the dust ring 8 and the side surface of the seal ring mounting groove 412, and a space is formed around the seal ring 7.

Therefore, when the gas storage chamber 6 is in an uninflated state, that is, when gas does not pass through the gas passage 9 to apply pressure to the seal ring 7, because one end of the lip edge of the dust ring 8 abuts against the bearing cap 22, the dust ring 8 seals between the sealing protrusion 41 and the spindle support sleeve 2, and the seal ring 7 cannot seal between the sealing protrusion 41 and the spindle support sleeve 2, that is, the seal between the dust ring 8 and the sealing protrusion 41 and the spindle support sleeve 2 is tighter than the seal between the seal ring 7 and the sealing protrusion 41 and the spindle support sleeve 2, thereby playing a role of dust prevention.

When the machine tool 100 is in operation, the table 4 is rotated and the dust ring 8 is used to prevent dust from entering the gas storage chamber 6. When the worktable 4 stops rotating, an external gas source inputs gas into the gas storage cavity 6 through the gas inlet channel 211 and the ventilation channel 221; under the action of the gas pressure, the seal ring 7 can be abutted against the end face of the dust seal ring 8, and at the same time, the third lip 73 and the fourth lip 74 respectively radially expand in the direction of the outer wall of the bearing cap 22 and the inner wall face of the seal ring mounting groove 412 and respectively abut against the outer wall of the bearing cap 22 and the inner wall face of the seal ring mounting groove 412 to form a seal between the main shaft support sleeve 2 and the seal convex portion 41, the first lip 71 radially expands inward, the first lip 71 is fitted into the first chamfer 82 to seal a gap between the dust seal ring 8 and the bearing cap 22, the second lip 72 radially expands outward, the second lip 72 is fitted into the second chamfer 413 to seal between the dust seal ring 8 and the seal convex portion 41, and the sealing effect is further improved. Because of the sealing ring 7, gas flows from the gas outlet channel 42 of the worktable 4 to each synchronous clamp of the worktable 4 for purging.

Examples effects and effects

The embodiment provides a machine tool, which comprises a machine frame, a workbench main shaft, a main shaft supporting sleeve and a workbench. The workbench main shaft extends along the horizontal direction and is rotatably installed in the rack, the main shaft supporting sleeve is sleeved outside the workbench main shaft, the center of the workbench is fixed at one end of the workbench main shaft, and an annular sealing convex part is arranged at the end part of the workbench main shaft and used for installing the main shaft supporting sleeve. A gas storage cavity is formed between the end face of the main shaft supporting sleeve and the sealing convex portion, a sealing ring and a dustproof ring are arranged between the outer wall of the main shaft supporting sleeve and the inner wall of the sealing convex portion, and the sealing ring is located on one side close to the gas storage cavity. When the gas storage cavity is inflated, the sealing lip on the sealing ring can be unfolded and pressed on the dustproof ring, and the dustproof ring and the main shaft supporting sleeve are sealed. When the air storage cavity is in an uninflated state, the dust ring seals and prevents dust for the main shaft support sleeve and the workbench, and the sealing ring is not basically sealed at the moment, so that the abrasion between the sealing ring and the workbench due to the rotation of the main shaft support sleeve is avoided; and when the workstation stopped rotating, the gas storage chamber was aerifyd, and the sealing washer seals main shaft support cover and workstation because atmospheric pressure, and gaseous can carry out blowing and sweeping to anchor clamps through the workstation. The dust ring prevents outside dust from entering the workbench, so that the clamping and positioning accuracy of workpieces is influenced, the sealing ring ensures the sealing between the workbench and the main shaft support sleeve when the scavenging gas enters the workbench, and the metal chips swept by the scavenging gas and the cooling liquid wrapped with the metal chips are prevented from entering the workbench. And the dustproof ring and the sealing ring respectively play a role when the gas storage cavity is inflated and not inflated, so that the abrasion of the sealing ring is reduced while the sealing effect is ensured, and the service lives of the dustproof ring and the sealing ring are prolonged.

Further, the sealed convex part of the lathe that this embodiment provided has dust ring mounting groove and sealing washer mounting groove, dust ring and sealing washer set up respectively in dust ring mounting groove and sealing washer mounting groove, sealed convex part one end opening, be convenient for install the sealing washer earlier, install the dust ring again, the dust ring is fixed a position through the gland, the sealing washer then carries on spacingly through dust ring and step face, thereby the stability of dust ring and sealing washer has been guaranteed when the workstation is rotatory and the gas storage chamber is aerifyd, also easy to assemble.

Further, the sealing lip of the sealing washer of lathe that this embodiment provided has and is the annular and first lip and the second lip that are close to the dust ring setting, and first lip is to the direction slope that is close to main shaft support cover, and the second lip is to the direction slope of keeping away from main shaft support cover, and first lip and second lip can press on the dust ring because atmospheric pressure when the gas storage chamber is aerifyd, and first lip also can press on the main shaft support cover realize with the sealed of main shaft support cover, have increased the sealing capacity of sealing washer.

Further, the terminal surface has first chamfer in the dust ring of the lathe that this embodiment provided, and the sealing washer mounting groove has the second chamfer near the border of dust ring, and when letting fill gas, two chamfers are embedded into respectively to sealed lip, let two chamfers all play the guide effect when deformation to sealed lip and the limiting displacement when sealed, and then better support the cover and seal up forming between the convex part to the main shaft and seal up sealedly, improved sealed effect.

Further, the sealed lip of the sealing washer of lathe that this embodiment provided still has third lip and the fourth lip that is close to the setting of gas storage chamber, can radially expand when gas storage chamber is inflated, extends to the outer wall of main shaft support cover and the inner wall of sealed convex part respectively and presses, increases the sealing strength of sealing washer.

Further, the inner diameter of the seal ring of the machine tool provided by the embodiment is larger than the outer diameter of the inner part of the sealing convex part, into which the spindle support sleeve is inserted. The sealing washer is in natural state when the gas storage chamber does not aerify, and the internal diameter is greater than the external diameter that its cover established position main shaft and supports the cover, and consequently the sealing washer can rotate along with the workstation when the workstation rotates, can not support the cover with the main shaft and produce the friction, mainly leans on the dust ring to play dustproof effect this moment to reduce the turning resistance of workstation, make the rotation more smooth, certainly also can reduce the wearing and tearing to the sealing washer, thereby improve its life on guaranteeing dirt-proof basis.

Further, the main shaft of lathe that this embodiment provided supports cover includes the bearing cap, and the bearing cap inserts sealed convex part inboard and with the workstation between form the gas storage chamber, be equipped with the skeleton oil blanket between the bearing cap inboard and the workstation main shaft, dust ring and sealing washer all overlap and establish in the bearing cap outside. The main shaft of the workbench penetrates through the base body and the bearing cover and is connected through the bearing, and the dustproof and sealing between the bearing cover and the sealing convex part are realized through the dustproof ring and the sealing ring. Simultaneously, the external diameter of bearing cap is less than the internal diameter of sealed convex part, forms gas passing channel between the periphery wall of bearing cap and the inner wall of sealed convex part, compares in the reduction clearance in conventional technique, and the clearance of increase makes the clearance form gas passing channel and can make gas flow through gas passing channel between the bearing cap of this embodiment and the sealed convex part to supplementary sealing washer seals, has further improved sealed effect.

Further, the main shaft of the lathe that this embodiment provided supports the cover and is provided with the inlet channel who communicates external air supply and go out the gas cavity, and the workstation is provided with in the intercommunication workstation and the outlet channel who stores the gas cavity, and inlet channel can guarantee that the external air supply provides being used for the gaseous letting in that sweeps, and outlet channel makes gaseous position that can flow to each synchronous anchor clamps through the workstation sweep.

The above embodiments are merely illustrative of specific embodiments of the present invention, and the present invention is not limited to the description of the above embodiments.

In the above-mentioned embodiment, sealed convex part is provided with dust ring mounting groove and sealing washer mounting groove, dust ring and sealing washer set up respectively in dust ring mounting groove and sealing washer mounting groove, in other embodiments, can not set up dust ring mounting groove and sealing washer mounting groove on the sealed convex part, the internal diameter of sealed convex part evenly sets up promptly, and simultaneously, tip at the bearing cap sets up dust ring mounting groove and sealing washer mounting groove, with dust ring and sealing washer setting in the dust ring mounting groove and the sealing washer mounting groove of bearing cap.

Claims

1. A machine tool, comprising:

a frame;

the workbench main shaft extends along the horizontal direction and is rotatably arranged on the rack;

the main shaft supporting sleeve is cylindrical, is fixedly arranged on the rack and is sleeved on the main shaft of the workbench; and

the center of the workbench is fixedly arranged on the workbench main shaft,

wherein the end surface of the workbench close to the workbench main shaft is provided with an annular sealing convex part, the main shaft support sleeve is inserted into the sealing convex part,

an air storage cavity is arranged between the end surface of the main shaft supporting sleeve and the end surface of the workbench,

a sealing ring and a dustproof ring are arranged between the outer wall of the main shaft supporting sleeve and the inner wall of the sealing convex part, the sealing ring is positioned at one side close to the air storage cavity,

a gas passing channel is arranged between the sealing ring and the gas storage cavity,

and a sealing lip which enables the sealing ring to be matched with the dustproof ring and the wall surface of the main shaft supporting sleeve for sealing when the air storage cavity is inflated is arranged on the sealing ring.

2. The machine tool of claim 1, wherein:

wherein the inner wall of the sealing convex part is provided with a dustproof ring mounting groove and a sealing ring mounting groove which are adjacently arranged,

the dustproof ring mounting groove is arranged at one side of the sealing ring mounting groove, which is far away from the gas storage cavity, the dustproof ring is arranged in the dustproof ring mounting groove, the sealing ring is arranged in the sealing ring mounting groove,

the air passing channel is communicated with the air storage cavity and the sealing ring mounting groove.

3. The machine tool of claim 1, wherein:

wherein an inner diameter of the seal ring is larger than an outer diameter of a portion of the main shaft support sleeve inserted into the sealing protrusion of the table.

4. The machine tool of claim 1, wherein:

wherein the sealing ring is a star-shaped sealing ring which is provided with a first lip and a second lip which are annular and are arranged close to the dust ring,

the first lip portion extends obliquely in a direction approaching the main shaft support sleeve,

the second lip portion extends obliquely in a direction away from the main shaft support sleeve.

5. The machine tool of claim 4, wherein:

wherein, the edge of the inner ring of the dust ring close to the sealing ring is provided with a first chamfer,

the edge of the sealing ring mounting groove close to the dust ring mounting groove is provided with a second chamfer,

when the air storage cavity is inflated, the first lip portion is embedded into the first chamfer, and meanwhile, the second lip portion is embedded into the second chamfer for sealing.

6. The machine tool of claim 4, wherein:

wherein the star-shaped sealing ring is provided with a third lip and a fourth lip which are annular and are arranged close to the end surface of the workbench,

the third lip portion extends obliquely in a direction approaching the main shaft support sleeve,

the fourth lip portion extends obliquely in a direction away from the main shaft support sleeve.

7. The machine tool of claim 2, wherein:

wherein, the thickness of sealing washer is less than the dust ring extremely the width of sealing washer mounting groove.

8. The machine tool of claim 2, wherein:

wherein a gap is arranged between one end of the dust ring close to the sealing ring and the peripheral wall of the main shaft supporting sleeve,

the side of the dust ring far away from the sealing ring is provided with a lip edge,

a gland is arranged at one end of the sealing convex part far away from the gas storage cavity and used for limiting the dust ring so that the lip edge is pressed on the outer peripheral wall of the main shaft support sleeve,

the dust ring mounting groove faces towards the end face of the dust ring, a sealing groove is formed in the end face of the dust ring, and a sealing gasket is arranged in the sealing groove.

9. The machine tool of claim 1, wherein:

wherein the main shaft supporting sleeve comprises a bearing seat and a bearing cover,

a first bearing is arranged between the bearing seat and the main shaft of the workbench,

the bearing cover is arranged in the sealing convex part inserted at one end of the main shaft supporting sleeve body close to the workbench,

the bearing cover and the workbench form the air storage cavity,

a framework oil seal is arranged between the inner side of the bearing cover and the main shaft of the workbench,

the dust ring and the sealing ring are arranged between the bearing cover and the sealing convex part,

the outer diameter of the bearing cover is smaller than the inner diameter of the sealing convex part, and a gas passing channel is formed between the outer peripheral wall of the bearing cover and the inner wall of the sealing convex part.

10. The machine tool of claim 1, wherein:

wherein, the peripheral wall of the main shaft supporting sleeve is provided with an air inlet channel communicated with an external air source and the air storage cavity,

and an air outlet channel communicated with the air storage cavity and the workbench is arranged on the end wall of the workbench close to the air storage cavity.