CN208681084U - The steel bushing combination unit being pre-stretched convenient for lead screw - Google Patents
The steel bushing combination unit being pre-stretched convenient for lead screw Download PDFInfo
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- CN208681084U CN208681084U CN201821214824.9U CN201821214824U CN208681084U CN 208681084 U CN208681084 U CN 208681084U CN 201821214824 U CN201821214824 U CN 201821214824U CN 208681084 U CN208681084 U CN 208681084U
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- lead screw
- steel bushing
- combination unit
- bushing
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Abstract
The utility model relates to lead screws to be pre-stretched field, disclose the steel bushing combination unit being pre-stretched convenient for lead screw, including the supporting element being set on lead screw, through-hole is offered in the middle part of supporting element, and the bearing steel bushing being set on lead screw is installed in through-hole, is equipped with holding tank in bearing steel bushing, bearing group is arranged on lead screw, bearing group is located in holding tank, and one end and the bearing steel bushing of bearing group offset, and the other end of bearing group is equipped with regulating mechanism.The technical program solves in the prior art at the both ends of lead screw while the problem of be pre-stretched, easily cause lead screw torsional deformation due to both ends unbalance stress.
Description
Technical field
The utility model relates to lead screws to be pre-stretched field, and in particular to attach together convenient for the steel bushing group that lead screw is pre-stretched
It sets.
Background technique
Lead screw is the basic mechanical driving device in NC machine tool feed system, and the precision of lead screw will have a direct impact on numerical control machine
The machining accuracy of bed.Screw rod can generate high-speed rotation during the work time, and screw rod can generate heat because of rotation at this time.It is cold according to heat expansion
The principle of contracting, lead screw fever can expand deformation, to increase lead, influence the precision of transmission and the positioning of lead screw.
It is thermally expanded to compensate lead screw, usually pre-stretching processing is carried out to lead screw, so that when lead screw operational heat,
The pre-stretching amount of lead screw can offset each other with thermal expansion amount, so that lead screw length in the case where internal tensile stress declines does not occur
Variation.Lead screw generallys use the fixed mounting means in both ends and is installed in the prior art, by being arranged simultaneously at lead screw both ends
Locking member carries out both ends stretching, but the mode that this both ends are pre-stretched simultaneously will lead to silk since stress is distinguished at both ends
Thick stick both ends unbalance stress easily causes the stretching torsional deformation of lead screw.
Utility model content
The utility model is intended to provide the steel bushing combination unit being pre-stretched convenient for lead screw, to solve to exist in the prior art
The problem of both ends of lead screw are pre-stretched simultaneously, easily cause lead screw torsional deformation due to both ends unbalance stress.
In order to achieve the above objectives, the technical solution of the utility model is as follows: the steel bushing combination being pre-stretched convenient for lead screw
Device offers through-hole, is equipped with and is set on lead screw in through-hole including the supporting element being set on lead screw in the middle part of supporting element
Bearing steel bushing, holding tank is equipped in bearing steel bushing, is arranged with bearing group on lead screw, bearing group is located in holding tank, bearing group
One end offset with bearing steel bushing, the other end of bearing group is connected with regulating mechanism.
The steel bushing combination unit being pre-stretched by adopting the above technical scheme convenient for lead screw, when practical application: supporting element is used
In the end of fixed lead screw, the one degree of freedom of lead screw is limited, stable support, supporting element are provided for subsequent prestretching process
The through-hole that opens up of middle part also function to the effect supported and fixed for accommodating bearing steel bushing, bearing steel bushing, while for accommodating
With the position of limited bearing group, regulating mechanism is used for the abutting power to lead screw transmitting pre-stretching, will push against power and is passed by bearing group
It is delivered on bearing steel bushing and supporting element, so that lead screw generates amount of tension with respect to bearing steel bushing and supporting element, in the lead screw course of work
In, which offsets each other with thermal expansion amount, compensates as screw travel.
The beneficial effect of the technical program is:
1. being the prestretching of force side by the way of single-ended pre-stretching in the technical program, when being pre-stretched to lead screw
Stretch is unified, avoids and at the both ends of lead screw while being pre-stretched in the prior art, is easily caused due to both ends unbalance stress
The problem of lead screw torsional deformation.
2. on the one hand the technical program will be arranged to supporting element and bearing steel bushing to the support of lead screw to be supported jointly can reduce
On the other hand the difficulty of processing can make bearing steel bushing and supporting element share the power of prestretching process jointly, what reduction was respectively subject to
Abrasion, extends the service life of equipment.
Further, regulating mechanism includes the bearing inner race bushing being set on lead screw, one end of bearing inner race bushing and axis
It holds group to offset, the other end of bearing inner race bushing is equipped with the rotating nuts connecting with threads of lead screw, is arranged outside bearing inner race bushing
There is bearing outer ring gland, bearing outer ring gland offsets with bearing steel bushing.
Rotating nuts are rotated, rotating nuts can be rotated relative to lead screw and be moved axially along lead screw, since rotating nuts are turning
It will receive the limitation of bearing inner race bushing during dynamic, so that rotating nuts generate axial abutting power, axis to bearing inner race bushing
Remake and use in bearing group to power is pushed against, bearing group will push against power again and act on to bearing steel bushing and supporting element, bearing steel bushing and
Supporting element to rotating nuts have it is reversed push against power so that rotating nuts can not relative support generate displacement, still, rotate spiral shell
Mother the axial of lead screw can generate displacement relatively, i.e. lead screw can be stretched to the opposite direction that rotating nuts are displaced, in the process,
The application that pretightning force is carried out by rotating nuts, so that lead screw circumferential direction uniform force, amount of tension are consistent.
Further, the axial section shape of through-hole is ladder-like.
Into a ladder by through-hole setting, on the one hand in order to accommodate bearing steel bushing, so that bearing steel bushing and supporting element cooperation are tight
It is close, guarantee the stable delivery of support force, meanwhile, through-hole setting is stepped can be also fixed bearing steel set and clamping, protected
Both cards part is stably connected with.
Further, supporting element is cast-iron chock.
Due to the technical program supporting element and the cooperation support of bearing steel bushing, the rigidity of bearing steel bushing supports preload enough
Power, thus supporting element is arranged to cast-iron chock, cast-iron chock reduces equipment relative to traditional cast-steel chock
Investment.
Further, one end that bearing outer ring gland and bearing steel bushing offset is equipped with the protrusion being stuck in bearing steel bushing, protrusion
It offsets with bearing group.
Bearing outer ring gland, on the one hand can be with bearing inner race bushing and bearing in the axial abutting power by rotating nuts
Group collective effect pushes against bearing steel bushing, so that axial abutting power is uniformly applied to bearing steel and puts on；Another aspect bearing outer ring
Protrusion on gland can squeeze bearing group, so that protrusion push against admittedly to the position of bearing group jointly with bearing inner race bushing
It is fixed；Simultaneously as protrusion is stuck in bearing steel bushing, it is also ensured that being stably connected between bearing outer ring gland and bearing steel bushing.
Further, bearing group is two angular contact bearings, and two angular contact bearings are contrary.
Angular contact bearing is used for Auxiliary support lead screw, while the contrary setting of two angular contact bearings, so that in lead screw
Axial abutting power can be also saved in prestretching process, guarantee the drawing effect of lead screw.
Further, adjusting pad is equipped between cast-iron chock and bearing steel bushing.
The effect of adjusting pad is to carry out thickness match grinding according to the rigging error of bearing steel bushing and cast-iron chock.
Detailed description of the invention
Fig. 1 is the structure sectional view for the steel bushing combination unit being pre-stretched in the utility model embodiment convenient for lead screw.
Specific embodiment
It is further described below by specific embodiment:
Appended drawing reference in Figure of description includes: lead screw 1, cast-iron chock 2, bearing steel bushing 3, angular contact bearing 4, axis
Hold inner ring bushing 5, rotating nuts 6, bearing outer ring gland 7, adjusting pad 8, bolt 9, protrusion 10.
Embodiment is substantially as shown in Fig. 1: the steel bushing combination unit being pre-stretched convenient for lead screw, including is set in lead screw
Supporting element on 1, the supporting element in the present embodiment are cast-iron chock 2, and the middle part of cast-iron chock 2 offers stair-stepping logical
Hole is equipped with the bearing steel bushing 3 being set on lead screw 1 in through-hole, and adjusting pad is equipped between cast-iron chock 2 and bearing steel bushing 3
8, the effect of adjusting pad 8 is to carry out thickness match grinding according to the rigging error of bearing steel bushing 3 and cast-iron chock 2.Bearing steel bushing 3
It is interior to be equipped with holding tank, bearing group is arranged on lead screw 1, bearing group is two angular contact bearings 4, two 4 directions of angular contact bearing
On the contrary, i.e. two back-to-back settings of angular contact bearing 4, bearing group are located in holding tank, the right end and bearing steel bushing 3 of bearing group
It offsets, the left end of bearing group is connected with regulating mechanism.
Regulating mechanism includes the bearing inner race bushing 5 being set on lead screw 1, the right end and bearing group of bearing inner race bushing 5
It offsets, the left end of bearing inner race bushing 5 is connected with the rotating nuts 6 being threadedly coupled with lead screw 1, is arranged outside bearing inner race bushing 5
There is bearing outer ring gland 7, bearing outer ring gland 7 offsets with bearing steel bushing 3, and leads between bearing outer ring gland 7 and bearing steel bushing 3
It crosses bolt 9 to fix, one end that bearing outer ring gland 7 and bearing steel bushing 3 offset is integrally formed with the protrusion being stuck in bearing steel bushing 3
10, protrusion 10 offsets with bearing group.
The concrete operations that lead screw 1 is pre-stretched using the technical program are as follows: rotation rotating nuts 6, so that rotation spiral shell
Mother 6 axially to the right, when the right end of rotating nuts 6 offsets with bearing inner race bushing 5, continues to rotate rotation spiral shell along lead screw 1
Mother 6, the then axial direction that rotating nuts 6 can be made to apply to the right bearing inner race bushing 5 push against power, and bearing inner race bushing 5 squeezes to the right
Bearing group is stably fixed to bearing group in holding tank, since two angular contact bearings 4 are contrary, can save axial direction
Push against power so that it is axial push against that power is not consumed act on bearing steel bushing 3.
Meanwhile rotating nuts 6 can also apply axial abutting power to the right to bearing outer ring gland 7, so that bearing outer ring pressure
Lid 7 and the left part for pushing against bearing steel bushing 3 to the right, protrusion 10 on bearing outer ring gland 7 can and bearing inner race bushing 5 jointly
Bearing group is squeezed to the right, abutting fixation is carried out to the position of two angular contact bearings 4, so that bearing group is to the formation of bearing steel bushing 3
Stable inside support, guarantees the uniform force of bearing steel bushing 3.
It, can be to bearing group and bearing outer ring gland after bearing steel bushing 3 and cast-iron chock 2 are pushed against power by axial direction to the right
7 apply axial support force to the left, and rotating nuts 6 can not opposite cast-iron chock 2 under the action of axial support force to the left
Displacement is generated to the right, and still, since rotating nuts 6 are threaded on lead screw 1, the opposite lead screw 1 of the meeting of rotating nuts 6 is generated to the right
Displacement, i.e., lead screw 1 is stretched to the left by rotating nuts 6, generates pre-stretching amount.
The present embodiment is pre-stretched lead screw 1 by rotating rotating nuts 6, and the force side of pre-stretching is unique, and passes through
When bearing inner race bushing 5 and bearing steel bushing 3 stretch lead screw 1, so that the circumferential uniform force of lead screw 1, avoids lead screw 1 from existing
Skew is generated in prestretching process, lead screw 1 generates pre-stretching amount after pre-stretching, when lead screw 1 is during the work time due to high speed
When rotation generates heat and generates thermal expansion, which offsets each other with thermal expansion amount, compensates as 1 stroke of lead screw, guarantees silk
The precision of transmission and the positioning of thick stick 1.
Above-described is only the embodiments of the present invention, well known specific technical solution and/or characteristic etc. in scheme
Common sense does not describe excessively herein.It should be pointed out that for those skilled in the art, not departing from the utility model technology
Under the premise of scheme, several modifications and improvements can also be made, these also should be considered as the protection scope of the utility model, these
It all will not influence the effect and patent practicability of the utility model implementation.This application claims protection scope should be with its right
It is required that content subject to, the records such as specific embodiment in specification can be used for explaining the content of claim.
Claims (7)
1. the steel bushing combination unit being pre-stretched convenient for lead screw, it is characterised in that: including the supporting element being set on lead screw, branch
Through-hole is offered in the middle part of support member, and the bearing steel bushing being set on lead screw is installed in through-hole, is equipped with holding tank in bearing steel bushing,
Bearing group is arranged on the lead screw, bearing group is located in holding tank, and one end and the bearing steel bushing of bearing group offset, bearing group
The other end is connected with regulating mechanism.
2. the steel bushing combination unit according to claim 1 being pre-stretched convenient for lead screw, it is characterised in that: the adjusting
Mechanism includes the bearing inner race bushing being set on lead screw, and one end and the bearing group of bearing inner race bushing offset, bearing inner race lining
The other end of set is equipped with the rotating nuts connecting with threads of lead screw, and bearing outer ring gland, bearing are arranged with outside bearing inner race bushing
Outer ring gland offsets with bearing steel bushing.
3. the steel bushing combination unit according to claim 1 being pre-stretched convenient for lead screw, it is characterised in that: the through-hole
Axial section shape be it is ladder-like.
4. the steel bushing combination unit according to claim 1 to 3 being pre-stretched convenient for lead screw, it is characterised in that: institute
Stating supporting element is cast-iron chock.
5. the steel bushing combination unit according to claim 2 being pre-stretched convenient for lead screw, it is characterised in that: the bearing
One end that outer ring gland and bearing steel bushing offset is equipped with the protrusion being stuck in bearing steel bushing, and the protrusion offsets with bearing group.
6. the steel bushing combination unit according to claim 5 being pre-stretched convenient for lead screw, it is characterised in that: the bearing
Group is two angular contact bearings.
7. the steel bushing combination unit according to claim 4 being pre-stretched convenient for lead screw, it is characterised in that: the cast iron
Adjusting pad is equipped between bearing block and bearing steel bushing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821214824.9U CN208681084U (en) | 2018-07-28 | 2018-07-28 | The steel bushing combination unit being pre-stretched convenient for lead screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821214824.9U CN208681084U (en) | 2018-07-28 | 2018-07-28 | The steel bushing combination unit being pre-stretched convenient for lead screw |
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| Publication Number | Publication Date |
|---|---|
| CN208681084U true CN208681084U (en) | 2019-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821214824.9U Active CN208681084U (en) | 2018-07-28 | 2018-07-28 | The steel bushing combination unit being pre-stretched convenient for lead screw |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108581584A (en) * | 2018-07-28 | 2018-09-28 | 重庆宏钢数控机床有限公司 | The steel bushing combination unit being pre-stretched convenient for leading screw |
-
2018
- 2018-07-28 CN CN201821214824.9U patent/CN208681084U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108581584A (en) * | 2018-07-28 | 2018-09-28 | 重庆宏钢数控机床有限公司 | The steel bushing combination unit being pre-stretched convenient for leading screw |
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