CN207900668U - A kind of high precision turntable - Google Patents

Abstract

The utility model discloses a kind of high precision turntables, it is related to rotary table apparatus field, the problem of aiming to solve the problem that turntable Lack of support, its key points of the technical solution are that the lower end of the pedestal is detachably provided with bottom plate, thrust ball bearing is provided between the bottom plate and the rotating shaft for being placed on chassis interior, and the bottom plate offers the groove for placing thrust ball bearing；The table top lower end is detachably provided with sealing cover, and the insertion groove plugged for rotating shaft is offered on the sealing cover；The lower end of the sealing cover be provided with the lateral wall of pedestal close to coaming plate, be provided between the coaming plate and pedestal turn stop component, to achieved the effect that increase turntable bearing capacity.

Description

A kind of high precision turntable

Technical field

The utility model is related to rotary table apparatus fields, more specifically, it relates to a kind of high precision turntable.

Background technology

Rotary table refers to carrying rotatable table top, to clamping workpiece and realizes the lathe that revolution and indexing position Attachment.

Existing Authorization Notice No. is that the Chinese patent of CN202411846U discloses a kind of high level of accuracy turntable comprising Pedestal and the rotating shaft being connect with base rotation, and NN type Biserial cylindrical roller bearings are provided between pedestal and rotating shaft.Bottom Seat lower part is provided with bottom plate, backing plate is equipped on bottom plate, and be provided with steel ball between backing plate and the bottom centre of rotating shaft.It utilizes Steel ball carries out axially position, reduces cumulative errors and improves the precision of revolution.

But when the pressure being applied on table top is larger, rotating shaft can be by table top and the object being placed on it Gravity.Because the contact area of rotating shaft and steel ball is smaller, when the load being applied on table top is larger, steel ball is applied to The reaction force of rotating shaft only acts upon the center position of rotating shaft, to reduce the service life of rotating shaft, therefore limits The bearing capacity of table top is made.

Utility model content

In view of the deficienciess of the prior art, the purpose of this utility model is to provide a kind of high precision turntable, have Increase the advantage of turntable bearing capacity.

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

A kind of high precision turntable, includes the rotating shaft of pedestal, table top and supporting bable tops, and the rotating shaft connects with base rotation It connects, the lower end of the pedestal is detachably provided with bottom plate, is set between the bottom plate and the rotating shaft for being placed on chassis interior It is equipped with thrust ball bearing, and the bottom plate offers the groove for placing thrust ball bearing；The table top lower end is removably set It is equipped with sealing cover, the insertion groove plugged for rotating shaft is offered on the sealing cover；The lower end of the sealing cover be provided with The lateral wall of pedestal close to coaming plate, be provided between the coaming plate and pedestal turn stop component.

By using above-mentioned technical proposal, table top is fixed by sealing cover and rotating shaft, and when work table rotation, setting exists Thrust ball bearing rotation between rotating shaft and bottom plate, so that table top can rotate movement relative to pedestal.Thrust Ball bearing can bear thrust load when running at high speed, and the contact area of thrust ball bearing and rotating shaft is larger, so as to Enough so that the reaction force that bottom plate is applied to rotating shaft uniformly acts on rotating shaft.It is avoided back by the way that thrust ball bearing is arranged The bottom stress of shaft is concentrated, and on the one hand can be increased the bearing capacity of table top, on the other hand can be ensured the effect in big load The rotating accuracy of following table.In addition the area of setting table top is more than the area of sealing cover, so that the lubrication flowed down along table top It being not easily accessed inside sealing cover and rotating shaft, the coaming plate for being also secured to sealing cover lower end is located on pedestal, to Reduce the liquid such as the lubricating oil between inflow pedestal and rotating shaft.Simultaneously be arranged between coaming plate and pedestal turn stop component energy It is enough to suspend table top, so that table top and pedestal are relatively fixed.

Further, described turn stop component include with the fixed inserted block of pedestal, with coaming plate is fixed abuts block and can It plugs into the bolt inside inserted block, the cross section of the bolt vertically is T-shaped, and the inserted block is offered to be coordinated with bolt Pin hole, it is described abut block lower face be less than bolt upper surface.

By using above-mentioned technical proposal, when needing to lock table top, bolt is plugged into inserted block, because of bolt edge The cross section of vertical direction is T-shaped, so the lower end of bolt is plugged into inserted block, the upper end of bolt and the upper surface of inserted block It abuts.Because the lower end for the abutting block being fixed on coaming plate is less than the upper end of bolt, to suspend table top.When table top needs When making rotary motion, push table top to which the latch-release between block and bolt will be abutted.Then it will plug into inside inserted block Bolt extract, abut the lower end of block and there are gap the upper end of inserted block, to relieve the lock between table top and pedestal It is fixed so that table top can make rotary motion relative to pedestal.

Further, the abutting block includes the link block being embedded inside coaming plate and is detachably configured with link block Movable block.

Block is abutted by using above-mentioned technical proposal, when table top locks and bolt abuts, and block is abutted after long-term use Lower end deforms upon due to the extruding by bolt, to reduce the locking effect of table top and pedestal.Therefore block will be abutted The link block that is arranged to be embedded in coaming plate and removably movable block, and movable block can be abutted with bolt.Therefore detachable The movable block on ground is convenient for changing and uses.

Further, the movable block is provided with cushion pad close to the lower face of inserted block.

By using above-mentioned technical proposal, cushion pad can buffer the collision abutted between block and inserted block, to movable block and Bolt has certain protective effect.

Further, the sealing cover is provided with locating piece close to the upper surface of table top, and the table top is offered and positioned The locating slot of block cooperation.

By using above-mentioned technical proposal, when reducing table top revolution by the cooperation of locating piece and locating slot, table top and Relative displacement between sealing cover.So that the fixation between table top and sealing cover is more stablized.

Further, the locating piece is in quadrangle.

By using above-mentioned technical proposal, quadrangularly is arranged in locating piece, locating piece is reduced and the opposite of locating slot turns It is dynamic, so as to increase stability between table top and sealing cover.

Further, it is provided with gasket between the table top and sealing cover.

By using above-mentioned technical proposal, gasket can increase the leakproofness between table top and sealing cover, to reduce Enter between table top and sealing cover along the liquid that table top flows down, to influencing fixed stability between table top and sealing cover, And the precision of table top revolution.

Further, the bottom wall of the insertion groove is provided with friction pad.

By using above-mentioned technical proposal, friction pad can increase the stiction between insertion groove and rotating shaft, to Increase fixed stability between rotating shaft and sealing cover.

In conclusion the utility model has the advantages that：

1, by the way that rotating shaft, thrust ball bearing, locating piece and locating slot is arranged, by uniformly disperseing rotating shaft and thrust Active force between ball bearing increases the bearing capacity of table top while ensureing rotating accuracy；

2, by the way that inserted block is arranged, abuts block and bolt, the pause of table top rotary motion can be controlled.

Description of the drawings

Fig. 1 is the overall schematic of high precision turntable in embodiment；

Fig. 2 is sectional view when high precision turntable is turned round in embodiment；

Fig. 3 is the enlarged drawing of part A in Fig. 2；

Fig. 4 is the enlarged drawing of part B in Fig. 2；

Fig. 5 is the enlarged drawing of C portion in Fig. 2；

Fig. 6 is sectional view when high precision turntable is suspended in embodiment；

Fig. 7 is the enlarged drawing of the parts D in Fig. 6.

In figure：1, pedestal；11, object placing cavity；12, lock chamber；13, annular groove；14, NN types Biserial cylindrical roller bearing；2, bottom Plate；21, groove；3, table top；31, gasket；32, locating slot；4, rotating shaft；5, thrust ball bearing；51, foundation ring；52, blowout patche； 53, steel ball；6, sealing cover；61, coaming plate；62, insertion groove；621, friction pad；63, locating piece；7, inserted block；71, pin hole；72, it inserts Pin；8, block is abutted；81, link block；82, movable block；821, cushion pad.

Specific implementation mode

The utility model is described in further detail below in conjunction with attached drawing.

This specific embodiment is only the explanation to the utility model, is not limitations of the present invention, ability Field technique personnel can as needed make the present embodiment the modification of not creative contribution after reading this specification, but As long as all being protected by Patent Law in the right of the utility model.

Embodiment：

A kind of high precision turntable, referring to Fig.1 comprising the table top 3 that can be turned round and the pedestal 1 being arranged below table top 3, Pedestal 1 is fixed by foundation bolt and ground or other supporters in the present embodiment.

With reference to Fig. 2, the setting of pedestal 1 is in inverted T-type, the upper end of pedestal 1 downwards concave shape at object placing cavity 11.Pedestal 1 Lower end offer the lock chamber 12 that setting is connected to object placing cavity 11, be provided in lock chamber 12 neat with the lower face of pedestal 1 The bottom plate 2 of flat setting, the present embodiment bottom plate 2 and pedestal 1 are fixed by several dormant bolts.

With reference to Fig. 2, the lower face of table top 3 is provided with sealing cover 6, the upper surface of sealing cover 6 and the lower end face paste of table top 3 It closes, and is fixedly connected by several dormant bolts.The lower face of sealing cover 6 is surrounded with the outside with pedestal 1 vertically downward Wall close to coaming plate 61, the lateral wall of coaming plate 61 and the lateral wall of sealing cover 6 flush setting, sealing cover 6 and is enclosed in the present embodiment Plate 61 is integrally formed.

With reference to Fig. 2, the upper surface of sealing cover 6 is provided with locating piece 63, and table top 3 offers the positioning coordinated with locating piece 63 Slot 32, in order to improve the stability of the connection between table top 3 and sealing cover 6, quadrangularly is arranged in locating piece 63.

With reference to Fig. 2 and Fig. 3, table top 3 is bonded with gasket 31 close to the lower face of sealing cover 6, can increase 3 He of table top Leakproofness between sealing cover 6.6 preferred caulking gum of sealing cover in the present embodiment.

With reference to Fig. 2, it is placed with the rotating shaft 4 being rotatablely connected with bottom plate 2 in object placing cavity 11, is set between rotating shaft 4 and pedestal 1 It is equipped with NN types Biserial cylindrical roller bearing 14, and is interference fitted between NN types Biserial cylindrical roller bearing 14 and rotating shaft 4.To Reduce the rotation error between rotating shaft 4 and pedestal 1, improves the rotating accuracy of rotating shaft 4.

With reference to Fig. 2 and Fig. 3, the lower face of sealing cover 6 offers the insertion groove 62 plugged for rotating shaft 4, in order to increase back Frictional force between shaft 4 and insertion groove 62, the bottom wall of insertion groove 62 are bonded with friction pad 621, friction pad 621 in the present embodiment Preferred rubber pad.

With reference to Fig. 2 and Fig. 4, thrust ball bearing 5 is provided between rotating shaft 4 and bottom plate 2, thrust ball bearing 5 includes foundation ring 51, blowout patche 52 and several steel balls 53.The bottom of rotating shaft 4 is plugged into the inside of blowout patche 52, and the upper surface of bottom plate 2 offers and puts The groove 21 of bottom set circle 51, so as to the displacement of limit thrust ball bearing 5.

It with reference to Fig. 2 and Fig. 5, is provided between coaming plate 61 and pedestal 1 and turns to stop component, turn to stop component to include being fixed on pedestal 1 On inserted block 7 and the abutting block 8 that is fixed in coaming plate 61.The lateral wall of pedestal 1 thereto thimble around offering annular groove 13, inserted block 7 are weldingly fixed in annular groove 13, and side of the inserted block 7 far from annular groove 13 offers pin hole 71.

With reference to Fig. 5, it includes the work for being embedded the link block 81 inside coaming plate 61 and being detachably connected with coaming plate 61 to abut block 8 Motion block 82.In order to increase link block 81 and movable block 82 and 61 fixed stability of coaming plate, link block 81 and living in the present embodiment Motion block 82, which is all provided with, is set to T-type, and link block 81 is fixedly connected with movable block 82 by dormant bolt.The lower face of movable block 82 and There are certain gaps between the upper surface of inserted block 7 so that table top 3（With reference to Fig. 2）Rotary motion can be done.

Referring to figure 6 and figure 7, turn to stop component to further include the bolt 72 that can be plugged in inside inserted block 7.It needs to stop table top 3 When rotation stop is moved, bolt 72 is plugged into pin hole 71（With reference to Fig. 5）Inside.Vertically transversal of bolt 72 in the present embodiment Face is T-shaped.After plugging bolt 72 into 71 inside of pin hole, the upper end of bolt 72 and inserted block 7 contact, to consolidate bolt 72 It is scheduled on inserted block 7.The lower face of movable block 82 is located at the lower section of 72 upper surface of bolt, is connect with bolt 72 when movable block 82 is turned back to When tactile position, bolt 72 and the collision of movable block 82 are to suspend table top 3.

With reference to Fig. 7, the side wall of movable block 82 is bonded with cushion pad 821, can buffer between movable block 82 and bolt 72 Collision.821 preferred rubber pad of cushion pad in the present embodiment.

Operation principle is as follows：

When table top 3 turns round, rotating shaft 4, sealing cover 6 and coaming plate 61 can follow the rotation of table top 3 to move together, be arranged at this time Thrust ball bearing 5 between rotating shaft 4 and bottom plate 2 rotates, and reduces the turn error between table top 3 and pedestal 1, to keep The rotating accuracy of table top 3.

During table top 3 rotates, the coaming plate 61 being arranged on 6 lower face of sealing cover can do synchronous rotation with table top 3 Transhipment is dynamic.There are certain gaps between movable block 82 and inserted block 7 at this time, therefore the setting of inserted block 7 will not produce rotary motion It is raw to hinder and influence.

When needing to suspend the rotary motion of table top 3, bolt 72 is plugged into the inside of pin hole 71.It is turned round in table top 3 During, when movable block 82 and bolt 72 offset, because the lower face of movable block 82 is less than the upper surface of bolt 72, therefore Table top 3 stops operating because of the obstruction of bolt 72.

Claims (8)

1. a kind of high precision turntable, including pedestal（1）, table top（3）And supporting bable tops（3）Rotating shaft（4）, the rotating shaft （4）With pedestal（1）Rotation connection, it is characterised in that：The pedestal（1）Lower end be detachably provided with bottom plate（2）, described Bottom plate（2）Be placed on pedestal（1）Internal rotating shaft（4）Between be provided with thrust ball bearing（5）, and the bottom plate（2）It opens Equipped with placement thrust ball bearing（5）Groove（21）；The table top（3）Lower end is detachably provided with sealing cover（6）, described Sealing cover（6）On offer for rotating shaft（4）The insertion groove plugged（62）；The sealing cover（6）Lower end be provided with and bottom Seat（1）Lateral wall close to coaming plate（61）, the coaming plate（61）And pedestal（1）Between be provided with turn stop component.

2. high precision turntable according to claim 1, it is characterised in that：Described turn is stopped component and includes and pedestal（1）It is fixed Inserted block（7）With coaming plate（61）Fixed abutting block（8）And it can plug into inserted block（7）Internal bolt（72）, described to insert Pin（72）Cross section vertically is T-shaped, the inserted block（7）It offers and bolt（72）The pin hole of cooperation（71）, described Abut block（8）Lower face be less than bolt（72）Upper surface.

3. high precision turntable according to claim 2, it is characterised in that：The abutting block（8）Including being embedded in coaming plate （61）Internal link block（81）And and link block（81）Detachably it is configured movable block（82）.

4. high precision turntable according to claim 3, it is characterised in that：The movable block（82）Close to inserted block（7）Under End face is provided with cushion pad（821）.

5. according to the high precision turntable described in any claim in claim 1-4, it is characterised in that：The sealing cover（6） Close to table top（3）Upper surface be provided with locating piece（63）, the table top（3）It offers and locating piece（63）The locating slot of cooperation （32）.

6. high precision turntable according to claim 5, it is characterised in that：The locating piece（63）In quadrangle.

7. according to the high precision turntable described in any claim in claim 1-4, it is characterised in that：The table top（3）With Sealing cover（6）Between be provided with gasket（31）.

8. according to the high precision turntable described in any claim in claim 1-4, it is characterised in that：The insertion groove（62） Bottom wall be provided with friction pad（621）.