CN207139280U

CN207139280U - A kind of fluid pressure turntable

Info

Publication number: CN207139280U
Application number: CN201721176941.6U
Authority: CN
Inventors: 顾青龙; 吴云; 季永达
Original assignee: Anji Yuanmo Machinery Technology Co ltd
Current assignee: Anji Circular Grinding Machinery Technology Co ltd
Priority date: 2017-09-14
Filing date: 2017-09-14
Publication date: 2018-03-27
Anticipated expiration: 2027-09-14

Abstract

It the utility model is related to a kind of fluid pressure turntable, including mandrel, the absorbent module being fixedly connected with the mandrel, the driving conducting subassembly, bearing, sleeve, upper end cover and the bottom end cover that are fixedly connected with the mandrel；Core sleeve is in bearing, and bearing holder (housing, cover) is in sleeve；Opened up on the inner peripheral surface that bearing contacts with mandrel and be connected with the bearing bore of fluid and produce oil pressure and make mandrel side be suspended in fluid to be rotated；The top surface oil pocket for being connected with fluid is set to make directly to contact with the fluid in top surface oil pocket because bottom surface oil pocket produces the mandrel that suspends upwards of oil pressure on the lower surface of upper end cover, mandrel surrounding contacts with fluid during rotation, and rotation precision and stability are higher；Connected between each oil pocket and fuel supply chamber by pore, throttling control is carried out by pore, solves the technical problem that static pressure turntable precision is not high, stability is poor in the prior art.

Description

A kind of fluid pressure turntable

Technical field

The utility model belongs to precision manufactureing equipment technology field, and in particular to a kind of fluid pressure turntable.

Background technology

Accurate and ultra-precision machine tool is accurate and Ultra-precision Turning basis；Lathe turntable precision directly affects work pieces process Precision, therefore turntable is the core component that ultra-precision machine tool ensures machining accuracy, not only to have high running accuracy, Er Qieyao With high-mechanic rigidity, good hot expansibility, vibration resistance and process and assemble etc..

Turntable is due to make it that machining accuracy is low using conventional contacts bearing at present, the problems such as static pressure turntable bearing capacity difference, Traditional direct contact bearing frictional resistance is big, and hydrostatic bearing, which is operated in extremely low rotating speed, to be occurred creeping and crawl, work Temperature rise is also easy to produce under high rotating speed, vibration and noise are larger；Lubricant has pollution to environment；Fatal weak of rolling bearing Point is short life, and life-span distribution is discrete, and particularly high-speed bearing is more very.

High precision high rigidity closed type fluid static pressure disclosed in Chinese patent CN101407024A/pressure/dynamic-static pressure rotary work Platform, the method for giving another raising rigidity is the multiple axially and radially loading bearings installed vertically by multiple times Change and bearing guide are fixed, if equalizer bearing balances, the kinematic pair synchronous axial system connection of multiple bearings, fixed joint passes through work Platform base connects；The bearing pair of the secondary sliding pair of journal bearing and cod is synchronized with the movement into rigid unitary, each bearing There is oil pocket on the sliding surface of its geo-stationary of sliding pair.

But the pressure/dynamic-static pressure rotary table, due to setting multiple bearings, oil pressure caused by each bearing is difficult to holding one Cause, cause mandrel certain inclination when rotating to be present, the precision and stability of rotation is not good enough.

Utility model content

The purpose of this utility model is in view of the shortcomings of the prior art, there is provided a kind of fluid pressure turntable, by setting axle Hold chamber, bottom surface oil pocket and top surface oil pocket and produce oil pressure and mandrel is suspended in fluid and rotate, solve prior art intermediate station The technical problem that machining accuracy is low, frictional resistance is big, stability is poor.

To achieve the above object, the utility model provides following technical scheme：

A kind of fluid pressure turntable, including mandrel, the absorbent module that is fixedly connected with the mandrel and with the mandrel The driving conducting subassembly being fixedly connected, it is characterised in that also include：

Bearing, the bearing is arranged circumferentially to be opened up with the mandrel and on its internal inner peripheral surface contacted with mandrel There is the internal bearing bore for being connected with fluid, the internal bottom surface oil pocket for being connected with fluid is circumferentially offered on the upper surface of the bearing；Work When making, inside is connected with the bearing bore of fluid and bottom surface oil pocket produces oil pressure and mandrel bottom surface and side is suspended in fluid；

Sleeve, the sleeve be arranged with the bearing, its be internally provided with for the fuel supply chamber to each oil pocket fuel feeding and Oil circuit；

Upper end cover, the upper end cover are fixedly connected with the sleeve and contact setting with the mandrel, and it is contacted with mandrel The internal top surface oil pocket for being connected with fluid is circumferentially offered on face；During work, the top surface oil pocket that inside is connected with fluid produces oil pressure Mandrel top surface is set to be suspended in fluid；And

Bottom end cover, the bottom end cover are sheathed on the mandrel and are fixedly connected with the sleeve, it is with mandrel, sleeve it Between form fluid space.

As an improvement, the bearing bore is integrated setting.

As an improvement, the bearing bore is uniformly arranged for interruption, its quantity is at least six.

As an improvement, being provided with annular boss in the middle part of the inner peripheral surface of the sleeve, the annular boss includes being opened in On its upper surface to bottom surface oil pocket fuel feeding and with the bottom surface fuel supply chamber of the oil communication and be opened in its middle part give bearing bore supply Oil and with the side fuel supply chamber of the oil communication.

As an improvement, circumferentially offered on the upper surface of the sleeve to top surface oil pocket fuel feeding and with the oil communication Bottom surface fuel supply chamber.

As an improvement, the bearing bore and side fuel supply chamber, top surface oil pocket and top surface fuel supply chamber and bottom surface oil pocket and bottom Connected between the fuel supply chamber of face by some pores.

As an improvement, the mandrel is set along linear direction in step, it includes the core that diameter from bottom to up increases successively Axle first step, mandrel second step, the step of mandrel the 3rd, the step of mandrel the 4th and diameter increases successively from top to bottom mandrel 5th step, the step of mandrel the 6th and the step of mandrel the 7th, the stepped diameters of mandrel the 7th are more than the 4th stepped diameters, described The step outer circumference surface of mandrel the 7th is arranged at intervals with the sleeve inner peripheral surface.

As an improvement, the absorbent module includes being sheathed on the step of mandrel the 5th and being fixedly connected with the mandrel Adpting flange and the magnechuck that is fixedly connected with the adpting flange, the upper surface interval of the adpting flange and the sleeve Set.

As an improvement, it is described driving conducting subassembly include be arranged with the belt pulley on the mandrel second step and be arranged and Conducting slip ring on the mandrel first step.

As an improvement, the lower surface gap setting of the bottom end cover upper surface and the step of mandrel the 4th and being arranged thereon There is oil sealing.

The beneficial effects of the utility model are：

(1) the utility model is connected with the bearing bore of fluid by being opened up on the inner peripheral surface that is contacted in bearing with mandrel and produced Oil pressure makes mandrel side be suspended in fluid to be rotated, and mandrel side directly contacts with the fluid in bearing bore during rotation, rubs Wiping coefficient is relatively direct smaller with bearing touch, improves rotation precision when mandrel rotates；The edge on bearing upper surface simultaneously The bottom surface oil pocket for being connected with fluid is circumferentially opened up, the mandrel that bottom surface oil pocket produces oil pressure and makes to be positioned at the bearing upper surface hangs upwards It is floating, by fluid support mandrel, in order to avoid mandrel floats all the way up, set on the lower surface of upper end cover and be connected with fluid Top surface oil pocket makes directly to contact with the fluid in top surface oil pocket because bottom surface oil pocket produces the mandrel that suspends upwards of oil pressure, during rotation Mandrel surrounding contacts with fluid, and rotation precision and stability are higher；

(2) connected between each oil pocket of the utility model and fuel supply chamber by pore, fuel supply chamber is by being evenly distributed The pore of setting carries out fuel feeding to oil pocket, and throttling control is carried out by pore when passing through pore, controls the oil in oil pocket The flow of liquid, while oil pressure caused by oil pocket is controlled, make the circumferential uniform force in fluid of mandrel surrounding, avoid circumferential stress not Uniformly causing inclined arbor to cause, mandrel rotation precision is low, stability is poor；

In a word, the advantages that the utility model has simple in construction, and turntable rotation precision is high, stability is good.

Brief description of the drawings

It is required in being described below to embodiment for the technical scheme of clearer explanation the utility model embodiment The accompanying drawing used is briefly described, it should be apparent that, drawings discussed below is only some embodiments of the utility model, For one of ordinary skill in the art, on the premise of not paying creative work, it can also be obtained according to these accompanying drawings Obtain other accompanying drawings.

Fig. 1 is overall structure sectional view of the present utility model；

Fig. 2 is the utility model middle (center) bearing structural representation；

Fig. 3 is the utility model middle sleeve structural representation；

Fig. 4 is the utility model middle sleeve structure sectional view；

Fig. 5 is upper end cover structural representation in the utility model；

Fig. 6 is core shaft structure schematic diagram in the utility model.

Embodiment

The technical scheme in the embodiment of the utility model is clearly and completely illustrated below in conjunction with the accompanying drawings.

Embodiment one

Embodiment of the present utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning Same or similar element is represented to same or similar label eventually or there is the element of same or like function.Below by ginseng The embodiment for examining accompanying drawing description is exemplary, it is intended to for explaining the utility model, and it is not intended that to the utility model Limitation.

As shown in figure 1, a kind of fluid pressure turntable, including mandrel 1, be fixedly connected with the mandrel 1 absorbent module 2, And the driving conducting subassembly 3 being fixedly connected with the mandrel 1, in addition to：

Bearing 4, the bearing 4 be arranged with the mandrel 1 and on its internal inner peripheral surface contacted with mandrel 1 circumferentially The internal bearing bore 41 for being connected with fluid is offered, the internal bottom surface for being connected with fluid is circumferentially offered on the upper surface of the bearing 4 Oil pocket 42；During work, inside is connected with the bearing bore 41 of fluid and bottom surface oil pocket 42 produces oil pressure and the bottom surface of mandrel 1 and side is suspended In fluid；

Sleeve 5, the sleeve 5 are arranged and on the bearing 4, it is internally provided with for the fuel supply chamber to each oil pocket fuel feeding 51 and oil circuit 52；

Upper end cover 6, the upper end cover 6 are fixedly connected with the sleeve 5 and contact setting with the mandrel 1, itself and mandrel 1 The internal top surface oil pocket 61 for being connected with fluid is circumferentially offered on contact surface；During work, inside is connected with the top surface oil pocket 61 of fluid Producing oil pressure makes the top surface of mandrel 1 be suspended in fluid；And

Bottom end cover 7, the bottom end cover 6 are sheathed on the mandrel 1 and are fixedly connected with the sleeve 5, its with mandrel 1, Fluid space 71 is formed between sleeve 5.

Oil is produced it should be noted that being opened up on the inner peripheral surface that bearing 4 contacts with mandrel 1 and being connected with the bearing bore 41 of fluid Pressure makes the side of mandrel 1 be suspended in fluid to be rotated, and the side of mandrel 1 directly contacts with the fluid in bearing bore 41 during rotation, Coefficient of friction is relatively direct smaller with bearing touch, improves rotation precision when mandrel rotates；Simultaneously on the upper surface of bearing 4 The bottom surface oil pocket 42 for being connected with fluid is circumferentially opened up, bottom surface oil pocket 42 produces the mandrel 1 that oil pressure makes to be positioned at the upper surface of bearing 4 Suspend, by fluid support mandrel 1, in order to avoid mandrel 1 floats all the way up, set on the lower surface of upper end cover 6 upwards Be connected with the top surface oil pocket 61 of fluid make due to bottom surface oil pocket 42 produce the mandrel 1 that suspends upwards of oil pressure directly with top surface oil pocket 61 Fluid contact, the surrounding of mandrel 1 contacts with fluid during rotation, and rotation precision and stability are higher；

Further, as a preferred embodiment, the bearing bore 41 is integrated setting.

It should be noted that bearing bore 41 is wholely set the area for increasing bearing bore 41, make to be in oil level therein Product also increases, and mandrel 1 and fluid contact area increase, the face contacted equivalent to the script of mandrel 1 with the inner peripheral surface of bearing 4 during rotation Product is completely converted into the area that contact with fluid, mandrel 1 is rotated caused frictional force smaller, and precision is higher during rotation.

Further, as shown in figure 1, being provided with annular boss 53 in the middle part of the inner peripheral surface of the sleeve 5, the convex annular Platform includes opening up the bottom surface fuel supply chamber 511 connected to the fuel feeding of bottom surface oil pocket 42 on end face and with the oil circuit 52 thereon and opened up The fuel feeding of bearing bore 41 and the side fuel supply chamber 512 connected with the oil circuit 52 are given in its middle part, bottom surface fuel supply chamber 511 and side supply Oil pocket 512 carries out fuel feeding to bottom surface oil pocket 42 and bearing bore 41 respectively makes its internal generation oil pressure.

Further, as shown in figure 1, circumferentially offered on the upper surface of the sleeve 5 to the fuel feeding of top surface oil pocket 61 and The top surface fuel supply chamber 513 connected with the oil circuit 52, top surface fuel supply chamber 513 are used to make inside it to the progress fuel feeding of top surface oil pocket 61 Produce oil pressure.

It should be noted that bearing 4 is arranged and on the sleeve 5, in order to prevent bearing 4, drop will be in sleeve 5 downwards Portion sets an annular boss 53 to position bearing 4, and to be set with the end face contacted and periphery in annular boss 53 Corresponding bottom surface fuel supply chamber 511 and side fuel supply chamber 512 carry out fuel feeding to bottom surface oil pocket 42 and bearing bore 41 makes its internal generation Oil pressure is suspended among fluid with support mandrel 1 and rotated.

Further, as shown in figure 1, the bearing bore 41 and side fuel supply chamber 512, top surface oil pocket 61 and top surface fuel supply chamber Connected between 511 and bottom surface oil pocket 42 and bottom surface fuel supply chamber 513 by some pores 514.

It should be noted that being connected between each oil pocket and fuel supply chamber by pore, fuel supply chamber is by being evenly distributed The pore 514 of setting carries out fuel feeding to oil pocket, and throttling control, control oil are carried out by pore 514 when by pore 514 The flow of the fluid of intracavitary, while oil pressure caused by oil pocket is controlled, make the circumferential uniform force in fluid of the surrounding of mandrel 1, avoid Circumferential discontinuity causes the inclination of mandrel 1 to cause, and mandrel rotation precision is low, stability is poor.

Further, as shown in figure 3, the mandrel 1 along linear direction in step set, it include from bottom to up diameter according to The mandrel first step 11 of secondary increase, mandrel second step 12, the step 13 of mandrel the 3rd, the step 14 of mandrel the 4th and from top to bottom The step 15 of mandrel the 5th, the step 16 of mandrel the 6th and the step 17 of mandrel the 7th that diameter increases successively, the step of mandrel the 7th 17 diameters are more than the diameter of the 4th step 14, and the outer circumference surface of the 7th step of mandrel 17 is set with the inner peripheral surface interval of sleeve 5 Put.

It should be noted that the mandrel 1 will realize that the high rotation of high accuracy, stability will be on sleeve 5 and bearing 4 Complete to be rotated again after positioning, the positioning of mandrel 1 leans on the lower surface backstop of the step 17 of mandrel the 7th in the upper end of the bearing 4 On face, the lower surface backstop of the top end cap 6 of positioning of upper end cover 6 is on the upper surface of the 7th step 17.

Further, as shown in figure 1, the absorbent module 2 include be sheathed on the step 15 of mandrel the 5th and with institute State the adpting flange 11 that mandrel 1 is fixedly connected and the magnechuck 22 being fixedly connected with the adpting flange 21, the adpting flange 21 are arranged at intervals with the upper surface of the sleeve 5.

The magnechuck 22 of absorbent module 2 is driven to rotate it should be noted that mandrel 1 rotates, magnechuck 22 passes through electricity Magnetic suck clamps workpiece and rotated, and to realize that the high-precision rotary of magnechuck 22 should ensure that magnechuck 22 and the mandrel 1 height with one heart, by setting adpting flange 21 between magnechuck 22 and mandrel 1, is improved between magnechuck 22 and mandrel 1 Sealing.

Further, it is described driving conducting subassembly 3 include be arranged with the belt pulley 31 on the mandrel second step 12 and Be arranged with the conducting slip ring 32 on the mandrel first step 11, for being driven conduction to static pressure turntable, it is ensured that turntable has Driving force is driven.

Further, the lower surface gap setting of the upper surface of bottom end cover 7 and the step 14 of mandrel the 4th and thereon It is arranged with oil sealing 72.

It should be noted that the lower surface gap setting of the bottom end cover 7 and the step 14 of mandrel the 4th, bottom end cover 7 On be not provided with oil pocket, the fluid in static pressure turntable after each oil pocket after oil circuit is entered in fluid space 71 and cached by Oil-out is discharged, and is set oil sealing 72 to prevent fluid from leaking, is polluted.

Embodiment two

Identical wherein with embodiment one or corresponding part use with one corresponding reference of embodiment, risen to be easy See, hereafter only description and the distinctive points of embodiment one.The difference of the embodiment two and embodiment one is：As shown in Fig. 2 In the present embodiment, the bearing bore 41 is uniformly arranged for interruption, and its quantity is at least six.

It should be noted that in embodiment one, the bearing bore 41 is integrated setting, increases connecing for fluid and mandrel 1 Contacting surface is accumulated, and reduces frictional resistance, and the bearing bore 41 interruption is uniformly arranged in the present embodiment, between each bearing bore 41 by Respective pore 514 carries out fuel feeding and throttling, it is ensured that the oil pressure of each bearing bore 41 is consistent, ensure the surrounding of mandrel 1 by Power is uniform, further increases rotation precision and stability.

The course of work：

Oil inlet is passed through fluid into sleeve 5, and fluid is flowed in sleeve 5 between each oil circuit, enters bottom surface fuel feeding Chamber 513, side fuel supply chamber 512 and top surface fuel supply chamber 511, have and open up some pores 514 thereon to bottom surface oil pocket 42, axle Hold chamber 41 and top surface oil pocket 61 carries out fuel feeding and carries out the consistent oil pressure of throttling generation by the pore 514, mandrel 1 is in oil pressure Supporting role low suspension is in fluid, while driving conducting subassembly 3 to be driven mandrel 1 makes it under suspended state in fluid The middle connected magnechuck 22 of rotation drive that carries out rotates, and the absorption of magnechuck 22 clamps work and entered by external equipment Row processing.

In description of the present utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width Degree ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer ", The orientation or position relationship of the instructions such as " clockwise ", " counterclockwise " be based on orientation shown in the drawings or position relationship, be only for Be easy to describe the utility model and simplify to describe, rather than instruction or imply signified equipment or element must have it is specific Orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.

In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or Implicitly include one or more this feature.In description of the present utility model, " multiple " are meant that two or two More than, unless otherwise specifically defined.

The foregoing description of the disclosed embodiments, make those skilled in the art do not depart from it is of the present utility model spirit and In the case of scope, various changes or equivalence replacement can be carried out to these features and embodiment.In addition, of the present utility model Under teaching, these features and embodiment can be modified new without departing from this practicality to adapt to particular situation and material The spirit and scope of type.Therefore, the utility model is not limited to the particular embodiment disclosed, and falls with the application Right in embodiment belong to the scope of protection of the utility model.

Claims

1. a kind of fluid pressure turntable, including mandrel (1), the absorbent module (2) being fixedly connected with the mandrel (1), Yi Jiyu The driving conducting subassembly (3) that the mandrel (1) is fixedly connected, it is characterised in that also include：

Bearing (4), the bearing (4) are arranged and edge on the inner peripheral surface contacted on the mandrel (1) and inside it with mandrel (1) The internal bearing bore (41) for being connected with fluid is circumferentially offered, circumferentially offering inside on the upper surface of the bearing (4) is connected with oil The bottom surface oil pocket (42) of liquid；During work, inside is connected with the bearing bore (41) of fluid and bottom surface oil pocket (42) produces oil pressure and makes mandrel (1) bottom surface and side are suspended in fluid；

Sleeve (5), the sleeve (5) are arranged and on the bearing (4), it is internally provided with for the fuel feeding to each oil pocket fuel feeding Chamber (51) and oil circuit (52)；

Upper end cover (6), the upper end cover (6) are fixedly connected with the sleeve (5) and contact setting with the mandrel (1), its with The internal top surface oil pocket (61) for being connected with fluid is circumferentially offered on mandrel (1) contact surface；During work, inside is connected with the top of fluid Face oil pocket (61), which produces oil pressure, makes mandrel (1) top surface be suspended in fluid；And

Bottom end cover (7), the bottom end cover (6) are sheathed on the mandrel (1) and are fixedly connected with the sleeve (5), itself and core Fluid space (71) are formed between axle (1), sleeve (5).

2. a kind of fluid pressure turntable according to claim 1, it is characterised in that the bearing bore (41), which is integrated, to be set Put.

3. a kind of fluid pressure turntable according to claim 1, it is characterised in that the bearing bore (41) is uniform for interruption Set, its quantity is at least six.

4. a kind of fluid pressure turntable according to claim 1, it is characterised in that the inner peripheral surface of the sleeve (5) Middle part is provided with annular boss (53), the annular boss include opening up thereon on end face to bottom surface oil pocket (42) fuel feeding and with institute State oil circuit (52) connection bottom surface fuel supply chamber (511) and be opened in its middle part to bearing bore (41) fuel feeding and with the oil circuit (52) The side fuel supply chamber (512) of connection.

A kind of 5. fluid pressure turntable according to claim 1, it is characterised in that edge on the upper surface of the sleeve (5) The bottom surface fuel supply chamber (513) for circumferentially offering to top surface oil pocket (61) fuel feeding and being connected with the oil circuit (52).

6. a kind of fluid pressure turntable according to claim 1, it is characterised in that the bearing bore (41) and side fuel feeding Between chamber (512), top surface oil pocket (61) and top surface fuel supply chamber (511) and bottom surface oil pocket (42) and bottom surface fuel supply chamber (513) Connected by some pores (514).

7. a kind of fluid pressure turntable according to claim 1, it is characterised in that the mandrel (1) is in along linear direction Step is set, and it includes mandrel first step (11), mandrel second step (12), mandrel that diameter from bottom to up increases successively the Three steps (13), the step (14) of mandrel the 4th and diameter increases successively from top to bottom the step (15) of mandrel the 5th, mandrel the 6th Step (16) and the step (17) of mandrel the 7th, mandrel the 7th step (17) diameter is more than the 4th step (14) diameter, described Step (17) outer circumference surface of mandrel the 7th is arranged at intervals with the sleeve (5) inner peripheral surface.

8. a kind of fluid pressure turntable according to claim 7, it is characterised in that the absorbent module (2) includes being arranged In on the step (15) of mandrel the 5th and the adpting flange (21) that is fixedly connected with the mandrel (1) and with the adpting flange (21) magnechuck (22) being fixedly connected, the adpting flange (21) and the upper surface of the sleeve (5) are arranged at intervals.

9. a kind of fluid pressure turntable according to claim 7, it is characterised in that the driving conducting subassembly (3) includes It is arranged and the belt pulley (31) on the mandrel second step (12) and is arranged and the conduction on the mandrel first step (11) Slip ring (32).

10. a kind of fluid pressure turntable according to claim 7, it is characterised in that bottom end cover (7) upper surface and institute State the lower surface gap setting of the step (14) of mandrel (1) the 4th and be arranged with oil sealing (72) thereon.