CN105345040A - Device used for vertical lathe and used for pre-tightening main shaft bearing through round nut - Google Patents

Device used for vertical lathe and used for pre-tightening main shaft bearing through round nut Download PDF

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Publication number
CN105345040A
CN105345040A CN201510789811.9A CN201510789811A CN105345040A CN 105345040 A CN105345040 A CN 105345040A CN 201510789811 A CN201510789811 A CN 201510789811A CN 105345040 A CN105345040 A CN 105345040A
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CN
China
Prior art keywords
main shaft
round nut
vertical lathe
bearing
shaft bearing
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Granted
Application number
CN201510789811.9A
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Chinese (zh)
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CN105345040B (en
Inventor
智伯雄
刘洪兵
毕俊喜
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Individual
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Individual
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/70Stationary or movable members for carrying working-spindles for attachment of tools or work

Abstract

The invention discloses a device used for a vertical lathe and used for pre-tightening a main shaft bearing through a round nut. The device comprises a main motor, fixed cylindrical cavities, rotating cylindrical cavities, cylindrical hollow hydraulic cylinders, rotating pull rods and a clamping device. The positioning and pre-tightening device used for the vertical lathe and used for pre-tightening the main shaft bearing through the round nut is a cylindrical device. The main motor is connected with a drive shaft to drive driven shafts to rotate. The driven shafts are pre-tightened with the rotating cylindrical cavities through large plane bearings and rotate relative to the fixed cylindrical cavities. The rotating pull rods are arranged in the fixed cylindrical cavities. The rotating pull rods exert pressure on the hydraulic hollow hydraulic cylinders through large hydraulic cylinders and control the rotating pull rods to axially move with a disc-shaped spring set. The rotating pull rods drive the clamping device to axially move through pin sets. The rotating cylindrical cavities drive the clamping device to rotate in the radial direction under meshing of upper meshing teeth and lower meshing teeth. The round nut to be pre-tightened can be driven to be screwed in under radial rotation of the clamping device in the radial direction of a main shaft to be pre-tightened. The rotating speed and the rotating angle of the main motor are controlled so that the stroke of the round nut to be pre-tightened can be controlled, and the aim of accurately pre-tightening the main shaft bearing of the vertical lathe can be achieved.

Description

A kind of for vertical lathe with the device of round nut mode pretension main shaft bearing
Technical field
The invention belongs to Modern mechanical design technical field, be specifically related to a kind of for vertical lathe with the device of round nut mode pretension main shaft bearing.
Background technology
At present, China's vertical type numerically controlled machine development is swift and violent, more and more higher to the requirement of machine tool accuracy.Platen main shaft belongs to larger rotation shaft, and bearing moves in a circle with workbench main shaft in workbench main shaft rotation process middle (center) bearing inner ring.But because bearing exists the not enough problem that play amount is excessive or the excessive play amount caused of pretightning force is too small caused of pretightning force in workbench main shaft rotary course.Cause machine tool chief axis end face run-out precision, circular runout precision inaccurate, thus affect the assembly quality of whole lathe.
Therefore, in order to ensure the rational play amount of bearing, a kind of cod location pre-tightening apparatus need be developed to keep the reasonability of main shaft bearing play amount, thus improving machine tool workbench main shaft rotation precision.
Summary of the invention
In order to solve above-mentioned Problems existing, the invention provides a kind of for vertical lathe with the device of round nut mode pretension main shaft bearing.
The present invention is achieved through the following technical solutions:
A kind of for vertical lathe with the device of round nut mode pretension main shaft bearing, comprise mair motor, holding cylindrical cavity, rotational circle cylindrical chamber, cylinder type hollow hydraulic cylinder, rotating rod, gripping mechanism, described mair motor is that stepper motor is connected by shaft coupling with driving shaft; Described driving shaft, driven shaft, respectively by two groups of angular contact ball bearing axial location, are rotated by helical gear engagement; Described holding cylindrical cavity and described rotational circle cylindrical chamber consist of taper roll bearing relative motion; Described cylinder type hollow hydraulic cylinder is a kind of hollow hydraulic means, moves axially, and rebounded by disk spring in order to promote rotating rod along main shaft; Described gripping mechanism is cylinder shape belt cylinder shape groove, rotates to pin location by rotating rod, and biting teeth is engaged disk spring convergent force and rotational circle cylindrical chamber is fixed, and pass through the device of jackscrew connecting machine tool main shaft round nut groove.
As further prioritization scheme of the present invention, the shaft shoulder axial location of described disk spring rotating rod, the range of pull bar by described cylinder type hollow hydraulic cylinder range and disk spring maximum by compressive strength two ore control.
As further prioritization scheme of the present invention, described taper roll bearing is in order to the radial location to holding cylindrical cavity and rotational circle cylindrical chamber.By adjustment pad peace spherical bearing to the relative axial position holding pretension to keep two cavitys of taper roller axle.
As further prioritization scheme of the present invention, described jackscrew group utilizes on machine tool chief axis round nut and carries top wire hole, drives round nut to rotate by gripping mechanism.
As further prioritization scheme of the present invention, described biting teeth is the band saw profile of tooth steel part be separately fixed at by four pairs of bolt groups on rotational circle cylindrical chamber and gripping mechanism, in order to ensure the mutually locked of rotational circle cylindrical chamber and gripping mechanism.Described rotational circle cylindrical chamber is provided with one group of dial plate near shaft coupling one end.Described dial plate rotarily drives holding cylindrical cavity by stepper motor and the relative motion of rotational circle cylindrical chamber produces registration.
This bearing pre-tightening device is by controlling the rotating cycle of main shaft round nut, the size of moment of torsion on round nut can be calculated by main motor current and revolution and be reflected on dial plate, thus the pretightning force that bearing is fixed, and effectively ensure that the reasonability of the play amount for pretension main shaft bearing; In addition, by changing the gripping mechanism of different size, pretension can be carried out to the machine tool chief axis of different-diameter.Compared with prior art, the invention has the beneficial effects as follows: compact conformation of the present invention, easy to operate, motion accurately, effectively can alleviate manual labor, can be used for machine tool chief axis or as leading screw, the pretension of speed reduction box shaft class.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention when unclamping;
Fig. 2 is the structural representation of the present invention when being engaged;
Fig. 3 is the partial enlarged drawing of the present invention's pull bar when unclamping.
Fig. 4 is the partial enlarged drawing of the present invention's pull bar when being engaged.
In figure: 1, mair motor; 2, shaft coupling; 3, dial plate; 4, holding cylindrical chamber end cap bolt group; 5, driving shaft; 6, bevel pinion; 7, driving shaft angular contact ball bearing; 8, holding cylindrical cavity; 9, taper roll bearing; 10, rotational circle cylindrical chamber; 11, large plane bearing; 12, cylindrical adjustment pad; 13, rotational circle cylindricality chamber end cap; 14, upper gripping tooth bolt group; 15, lower biting teeth; 16, lower biting teeth bolt group; 17, gripping mechanism; 18, jackscrew group; 19, pin group; 20, cylinder plate; 21, cylinder plate set bolt; 22, rotating rod; 23, driven shaft bolt group; 24, upper gripping tooth; 25, rotational circle cylindricality chamber end cap; 26, large hydraulic cylinder; 27, driven shaft; 28, large helical gear; 29, driven shaft angular contact ball bearing; 30, hydraulic cylinder button; 31, large hydraulic cylinder pipe joint; 32, disk spring group; 33, pull bar plane bearing; 34, cylinder type hollow hydraulic cylinder; 35, driven shaft end cap; 36, cylinder type hollow hydraulic cylinder pipe joint; 37, pull bar angular contact ball bearing; 38, knob; 39, holding cylindrical chamber end cap; 40 pin hole groups.
Detailed description of the invention
Below in conjunction with accompanying drawing and detailed description of the invention, the present invention is described in further detail.
Shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, of the present invention a kind of for vertical lathe with the location pre-tightening apparatus of round nut mode pretension main shaft bearing, include mair motor 1, driving shaft 5, driven shaft 27, rotational circle cylindrical chamber 10, holding cylindrical cavity 8, hydraulic means 34, rotating rod 22, gripping mechanism 17, described mair motor 1 is connected with described driving shaft 5 by described shaft coupling 2; Described driving shaft 5 is located by driving shaft angular contact ball bearing 7 described in a pair and is engaged rotation by described bevel pinion 6 with described large helical gear 29; Described large helical gear 29 is located by driven shaft 27 shaft shoulder and is driven described driven shaft 27 to rotate; Described driven shaft 27 is located by driven shaft angular contact ball bearing 29 described in a pair; The outer race of driven shaft angular contact ball bearing 29 described in driving shaft angular contact ball bearing 7 described in described a pair and a pair respectively with described holding cylindrical chamber end cap 39 interference fit; Described holding cylindrical chamber end cap 39 is connected by holding cylindrical chamber end cap bolt group 4 with described holding cylindrical cavity 8; Described holding cylindrical chamber end cap is installed described hydraulic cylinder button 30, described large hydraulic cylinder pipe joint 31, described dial plate 3; Described taper roll bearing 9 is by described holding cylindrical cavity 8 rigid bearing inner ring; Described taper roll bearing 9 outer race is fixed by described rotational circle cylindrical chamber 10 and is provided pretightning force by by described cylindrical adjustment pad 12 and described rotational circle cylindricality chamber end cap 25; Described rotational circle cylindricality chamber end cap 25 is connected by described rotational circle cylindrical chamber bolt group 14 with described rotational circle cylindrical chamber 10; Described rotational circle cylindricality chamber end cap 25 is connected by described driven shaft bolt group 23 with described cylindrical adjustment pad 12; Described large plane bearing 11 pressed on ring is located by the straight mouth of described holding cylindrical cavity 8; Described large plane bearing 11 times rings provide pretightning force by described rotational circle cylindricality chamber end cap 25 and described cylindrical adjustment pad 12; Described upper gripping tooth 24 is connected by described upper gripping tooth bolt group 14 with the described circular cylindrical cavity end cap 25 that turns; Described lower biting teeth 15 is connected by described lower biting teeth bolt group 16 with described gripping mechanism 17; Described gripping mechanism 17 is equipped with described jackscrew 18; Described gripping mechanism 17 has described pin hole group 40; When described rotating rod 22 is strained, described pin group 19 and described pin hole group 40 coordinate described upper gripping tooth 24 and described lower biting teeth 15 to be engaged simultaneously and drive described rotational circle cylindrical chamber 10 to rotate; Described pin group 19 interference fit is in described cylinder plate 20; Described cylinder plate 20 is fixed by described cylinder plate set bolt 21 with described rotating rod 22; Described disk spring group 32 and described cylinder type hollow hydraulic cylinder 34 and described its axial stretching of rotating rod 22 connection control; Described pull bar plane bearing 32 pressed on ring and described cylinder type hollow hydraulic cylinder 34 compress; The shaft shoulder of described pull bar plane bearing 32 times rings and described rotating rod 22 compresses; Described cylinder type hollow hydraulic cylinder 34 is connected by pull bar angular contact ball bearing 37 described in a group with described driven shaft 27; Described rotating rod 22 is connected with described knob 38; Described cylinder type hollow hydraulic cylinder pipe joint 36 is connected with described large hydraulic cylinder pipe joint 31;
Described structure installment of the present invention has mair motor, by controlling the rotating, corner etc. of mair motor, the size of be applied to machine tool mainshaft bearing pretightning force can be obtained by mathematical computations, and be reflected on dial plate by rotational circle cylindrical chamber and the relative motion of holding cylindrical cavity.Mair motor is by the effect fixedly serving double reduction of helical gear engagement and driven shaft and rotational circle cylindrical chamber on driving shaft, driven shaft.By controlling the flexible of cylinder type hollow hydraulic cylinder, rotating knob and controlling rotating rod position to reach the object of plug pin group, upper and lower biting teeth is engaged.Gripping mechanism, by jackscrew group, directly utilizes the screwed hole of the round nut for pretension to carry out radial location.Also according to different nut size, shape, different gripping mechanisms can be changed by rotating rod releasing orientation.

Claims (7)

1. one kind for vertical lathe with the device of round nut mode pretension main shaft bearing, comprise mair motor (1), holding cylindrical cavity (8), rotational circle cylindrical chamber (10), cylinder type hollow hydraulic cylinder (34), rotating rod (22), gripping mechanism (17), described mair motor (1) is connected with driven shaft (27) by driving shaft (5) with described holding cylindrical cavity (8), described holding cylindrical cavity (8) is connected by bearing with described rotational circle cylindrical chamber (10), in described holding cylindrical cavity (8), described rotating rod (22) is installed, described cylinder type hollow hydraulic cylinder (8) is installed in described rotating rod (22) end, described gripping mechanism (17) drives clamping by described rotating rod (22).
2. according to claim 1 a kind of for vertical lathe with the device of round nut mode pretension main shaft bearing, it is characterized in that: described mair motor (1) connects described driving shaft (5), described driven shaft (27) is driven to rotate by engagement, and be connected in holding cylindrical cavity by two groups of angular contact ball bearings, and be connected with described gripping mechanism (17) realize multi-stage speed-reducing by described driven shaft (27).
3. according to claim 1 a kind of for vertical lathe with the device of round nut mode pretension main shaft bearing, it is characterized in that: described holding cylindrical cavity (8) seals by described large hydraulic cylinder (26) counterweight and by described holding cylindrical chamber end cap (39) and described holding cylindrical chamber end cap (39) is provided with described dial plate (3) and the large hydraulic cylinder of control to the described hydraulic cylinder button (30) of hydraulic pressure.
4. according to claim 1 a kind of for vertical lathe with the device of round nut mode pretension main shaft bearing, it is characterized in that: described holding cylindrical cavity (8) and described rotational circle cylindrical chamber (10) are by (9) radial location of described taper roll bearing and by described pull bar plane bearing (33) axial location.
5. according to claim 1 a kind of for vertical lathe with the device of round nut mode pretension main shaft bearing, it is characterized in that: described cylinder type hollow hydraulic cylinder (34) provides hydraulic pressure by described large hydraulic cylinder (26), by the shaft shoulder of rotating rod described in jack-up (22), promote rotating rod to move vertically, and rebounded by described disk spring group.
6. according to claim 1 a kind of for vertical lathe with the device of round nut mode pretension main shaft bearing, it is characterized in that: described rotating rod (22) is provided with knob (38) and described pull bar angular contact ball bearing (37), and lower end is connected with described cylinder plate (20).
7. according to claim 1 a kind of for vertical lathe with the device of round nut mode pretension main shaft bearing, it is characterized in that: described gripping mechanism (17) has cylinder shape groove by described cylinder plate (20) axial location, be engaged radial location by described upper gripping tooth (24) and described lower biting teeth (15), described gripping mechanism (17) is provided with jackscrew group (18).
CN201510789811.9A 2015-11-17 2015-11-17 It is a kind of for vertical lathe with the device of round nut mode pretension main shaft bearing Expired - Fee Related CN105345040B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510789811.9A CN105345040B (en) 2015-11-17 2015-11-17 It is a kind of for vertical lathe with the device of round nut mode pretension main shaft bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510789811.9A CN105345040B (en) 2015-11-17 2015-11-17 It is a kind of for vertical lathe with the device of round nut mode pretension main shaft bearing

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CN105345040A true CN105345040A (en) 2016-02-24
CN105345040B CN105345040B (en) 2017-05-31

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU530752A1 (en) * 1975-03-24 1976-10-05 Предприятие П/Я В-8424 Spindle assembly machine
US6286374B1 (en) * 1998-11-09 2001-09-11 Nsk Ltd. Preload measuring apparatus of rolling bearing
CN103231078A (en) * 2013-04-07 2013-08-07 北京航空航天大学 Device suitable for pre-tightening main shaft bearing of precision machine tool
CN103659256A (en) * 2013-12-13 2014-03-26 安徽巨一自动化装备有限公司 Main core nut differential screwing mechanism of drive axle assembly
CN205218071U (en) * 2015-11-17 2016-05-11 智伯雄 A device that is used for vertical lathe with round nut mode pretension main shaft bearing

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU530752A1 (en) * 1975-03-24 1976-10-05 Предприятие П/Я В-8424 Spindle assembly machine
US6286374B1 (en) * 1998-11-09 2001-09-11 Nsk Ltd. Preload measuring apparatus of rolling bearing
CN103231078A (en) * 2013-04-07 2013-08-07 北京航空航天大学 Device suitable for pre-tightening main shaft bearing of precision machine tool
CN103659256A (en) * 2013-12-13 2014-03-26 安徽巨一自动化装备有限公司 Main core nut differential screwing mechanism of drive axle assembly
CN205218071U (en) * 2015-11-17 2016-05-11 智伯雄 A device that is used for vertical lathe with round nut mode pretension main shaft bearing

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