CN203176289U - Ball screw - Google Patents
Ball screw Download PDFInfo
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- CN203176289U CN203176289U CN 201320166375 CN201320166375U CN203176289U CN 203176289 U CN203176289 U CN 203176289U CN 201320166375 CN201320166375 CN 201320166375 CN 201320166375 U CN201320166375 U CN 201320166375U CN 203176289 U CN203176289 U CN 203176289U
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- nut body
- ball screw
- ball
- face
- screw
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Abstract
The utility model relates to a ball screw, which comprises a screw, a screw cap and a plurality of balls, wherein the screw cap is arranged on the screw in a sliding mode. A ball channel is arranged between the screw cap and the screw. The screw cap comprises a screw cap body and at least one flow return device. The screw cap body is provided with at least one assembled opening. The assembled opening extends from one end surface to the other end surface of the screw cap body, and runs through the outer surface and the inner surface of the screw cap body. The flow return device is arranged at the assembled opening. The balls are contained in the ball channel. The ball screw disclosed by the utility model has the advantages that the processing difficulty and the manufacturing cost of the ball screw are reduced, and the positioning and assembling precision of the flow return device on the screw cap body is improved.
Description
Technical field
The utility model is about a kind of ball screw.
Background technique
Ball screw is a kind of device that is widely used in many machinery, and the purpose of its setting is to provide the transmission agency of precision, by rotatablely moving and straight line motion in the mechanically actuated, and then makes the board of carrying or object carry out start on rectilinear direction.
Present applied ball screw mainly comprises a screw rod, a nut, a plurality of ball, screw surface has spiral groove, the internal surface of nut also has spiral internal channel, form a ball channel between energy and screw rod, ball is placed in wherein, and form the relation of relative rolling with screw rod, nut, to reduce between screw rod and the nut frictional force in relative rotation.And wherein, ball moves to the other end by an end of ball channel, that is after moving to the other end by an end of nut, must be back to the starting point of ball channel by a return channel, could continue thus to roll in ball channel.
The form of return channel has a variety of, but on the whole it all is to be arranged on the outer surface of nut body, or is arranged at the end caps of nut body.So no matter be above-mentioned which kind of the position is set, in the prior art, in order to form the groove of ccontaining return channel, but the nut body must be through the complicated procedure that the height-precision requirement be arranged.But owing in the nut body course of working, for forming groove, often cause the thick degree of meat to reduce, therefore after heat treatment, often because thick thinner its heat distortion amount that makes of meat increases, and cracked problem is easily arranged more.Even make groove part structure generation distortion, and then cause the return channel assembling to be difficult for, make that the ball groove in the return channel can't positively mate with ball channel, and have influence on the smooth degree of the shuttling movement of ball further.
In brief, the past is in order to keep machining accuracy, but do not wish to take place above-mentioned problem, and its result promotes processing difficulties degree and cost exactly.In addition, the unmanageable problem of return channel Location accuracy that still has the processing rear groove to provide.
Therefore, how a kind of ball screw is provided, to utilize its novel structure design, reach the purpose of simplifying procedure, in addition, this structure Design also can reduce processing degree of difficulty and manufacture cost, and locating effect and the assembly precision of reinforcement return channel on the nut body, form a complete ball channel that does not have the section difference, single unit system can carry out stable start when guaranteeing to use, and has become one of important topic.
The model utility content
Because above-mentioned problem, the purpose of this utility model is for providing a kind of ball screw, to utilize its novel structure design, reach the purpose of simplifying procedure, in addition, this structure Design also can reduce processing degree of difficulty and manufacture cost, and strengthens locating effect and the assembly precision of return channel on the nut body, form a complete ball channel that does not have the section difference, single unit system can carry out stable start when guaranteeing to use.
For reaching above-mentioned purpose, comprise a screw rod, a nut and a plurality of ball according to a kind of ball screw of the present utility model.Nut is slidedly arranged on screw rod.Has a ball channel between nut and screw rod.Nut comprises a nut body and at least one return channel.The nut body has at least one assembling opening.The assembling opening extends to the direction of other end from an end face of nut body, and connects outer surface and the internal surface of nut body.Return channel is arranged at the assembling opening.A plurality of balls are placed in ball channel.
In one embodiment, return channel comprises two reflux assemblies.Two reflux assemblies have a clamping face respectively and with respect to one of clamping face face are set.Return channel arranges face with two and contacts with the nut body.
In one embodiment, two reflux assemblies one of them in the clamping mask one trip is arranged.Wherein another has an engagement portion in the clamping mask.Two reflux assemblies engage mutually by trip and engagement portion.
In one embodiment, two reflux assemblies one of them in the clamping mask one protuberance is arranged.Wherein another has a slot part in the clamping mask.Protuberance and slot part be the common leak stoppage structure that forms when two reflux assemblies engage mutually.
In one embodiment, reflux assembly has two protuberances respectively in two sides of clamping face.Another reflux assembly has two slot parts respectively in two sides of clamping face.
In one embodiment, the nut body has two winding inclined-planes in the both sides of assembling opening.The extension on two winding inclined-planes has an angle of cut.Return channel arranges face with two and contacts with two winding inclined-planes of nut body.
In one embodiment, the angle of the angle of cut is between 1～170 degree.
In one embodiment, the extension on two winding inclined-planes is towards the direction of the axis of nut body.
In one embodiment, the extension on two winding inclined-planes is away from the direction of the axis of nut body.
In one embodiment, nut also comprises at least one dust preventing component.Dust preventing component has a positioning part.The positioning part is fixed in the assembling opening.
From the above, according to ball screw of the present utility model, connect the outer surface of nut body and the assembling opening of internal surface by formation on the nut body, for the return channel setting.Specifically, the assembling opening not only connects this inside and outside of nut, and the end face from the nut body extends to the direction of other end, and therefore assembling opening presents an open hatch frame with respect to the nut body, is fit to use open processing method to make.And open processing method, for example turnning and milling etc. is relatively easy, and is easy to the manufacturing process of QC.
Only on the outer surface of nut body or end face, form non-through groove structure compared to prior art, the utility model need not additionally to consider whether the meat of nut body is thick enough, and do not have because cause the meat thicknessization through processing, after after heat treatment, be easy to generate the big and cracked problem easily of heat distortion amount.Moreover ball screw of the present utility model also is difficult for producing distortion at the assembling opening in course of working, influences follow-up assembly precision.
Generally speaking, ball screw of the present utility model can be finished by easy procedure for processing because of the particular design of its structure, the difficulty that not only significantly reduces processing with expend time in, the more accuracy of manufacturing that can improve further and yield, the stability when promoting the ball screw overall operation.
Description of drawings
Figure 1A is the schematic appearance according to the utility model one embodiment's ball screw.
Figure 1B is the decomposing schematic representation of the ball screw shown in Figure 1A.
Fig. 1 C is the perspective view of the return channel of the ball screw shown in Figure 1A.
Fig. 1 D is the combination schematic representation of the return channel of the ball screw shown in Fig. 1 C.
Fig. 1 E is that the ball screw shown in Figure 1A is in the generalized section at hatching A-A place.
Fig. 2 is the generalized section according to the ball screw shown in another embodiment of the utility model.
Embodiment
Hereinafter with reference to relevant drawings, a kind of ball screw according to the utility model preferred embodiment is described, wherein identical assembly will be illustrated with identical reference marks.
Figure 1A is the schematic appearance according to the utility model one embodiment's ball screw, and Figure 1B is the decomposing schematic representation of the ball screw shown in Figure 1A.Please also refer to shown in Figure 1A and Figure 1B, ball screw S is formed by a plurality of assemblying, and those assemblies mainly comprise a screw rod 1, a nut 2 and a plurality of ball 3.Wherein, nut 2 is slidedly arranged on screw rod 1, and nut 2 and 1 common ball channel that forms of screw rod, and ball 3 then is placed in ball channel.Below incite somebody to action first structure characteristic and assembly at above-mentioned ball screw S it is described.
In present embodiment, nut 2 comprises a nut body 21, and nut body 21 forms by processing a nut body material (not shown).Specifically, nut body material can be metal bulk or columnar material, forms nut body 21 and thin portion structure thereof again after abrasive machining.Certainly, the processing molding method of nut body 21 is non-to be restricted person, and in practical application, nut body 21 also can mode such as be made as casting moulding, forging molding method, the turnning and milling method of forming by other and make.Nut body 21 can be a ring-type cylinder, and is formed with ball grooves 211 in the inboard.Certainly, in actual manufacture process, can on nut body material, be drilled with positions, hole such as flange hole, oilhole, return port according to user demand, or even by carrying out the surface heat processing in nut body material with the hardness of stiffnut body, the utility model also is not limited thereto.
In present embodiment, nut body 21 has at least one assembling opening, and explanation is especially earlier, and the assembling opening is used for a return channel setting, and its implementation detail will be described in back segment.Please refer to shown in Figure 1B, it is example that present embodiment has two assembling openings 212,213 with nut body 21, and two are assembled the opposite side that opening 212,213 is arranged at nut body 21.Specifically, two assembling openings 212,213 all extend to the direction of other end from an end face of nut body 21, with the assembling opening 212 be the example explanation, its first end face ES1 from nut body 21 extends to the direction of the second end face ES2, simultaneously, assembling opening 212 has also connected outer surface OS and the internal surface IS of nut body 21, and then presents the breach form of one " open " with respect to nut body 21.Therefore, on processing procedure, present embodiment only must can be adopted the mode of open operation by the mode, the particularly mode of CNC turnning and milling of lathe milling, on nut body 21, for example from the first end face ES1 or from outer surface OS, the former is to the second end face ES2, and the latter is to internal surface IS, directly eliminate the block of preliminary dimension, and form assembling opening 212.In practical application, assembling opening 212 also can be via turning or cutting process moulding.In addition, nut body 21 defines that the limit wall of assembling opening 212 is follow-up more can be removed remaining burr after the thick moulding by grinding and/or mode such as polishing be handled, and helps the reduction tolerance, and the utility model is not limited thereto.Again, above-mentioned unaccounted other operative section should be to have in the technical field under the utility model knows that usually the knowledgeable can the person of understanding, repeats no more in this.
In addition, worth special instruction is can make by the mode of open processing because assemble opening 212, and for running through inside and outside opening, when historical facts or anecdotes is executed QC, have detection easy, the advantage of measuring device simplification.
Hold above-mentioned, compared to prior art, nut body 21 of the present utility model and assembling opening 212,213 thereof, particularity because of its structural design, can form by open processing mode, the difficulty that not only significantly reduces small structure processing with expend time in, more be conducive to improve assembling opening 212,213 precision.
Fig. 1 C is the perspective view of the return channel of the ball screw shown in Figure 1A, please also refer to Figure 1A to Fig. 1 C, at first at the return channel explanation.Single structure can be according to return channel of the present utility model, the composite structure of the multicompartment shown in Fig. 1 C can also be.When return channel was single structure, processing procedure was comparatively simple, and the composite structure of right multicompartment has more and can improve precision, reduced the problem of inner processing ball channel difficulty.
In the present embodiment, to form return channels 22 be example to make up two reflux assemblies, and for clearly demonstrating thin portion structure and the compound mode of two reflux assemblies, be referred to as with one first reflux assembly 221 and one the twoth reflux assembly 222 respectively, right and unrestricted both must be for identical or different.
For strengthening the clamping stability, in present embodiment, the first clamping face 221a has two engagement portion 221c, the second clamping face 222a then corresponding two engagement portion 221c has two trip 222c, and two reflux assemblies engage mutually by above-mentioned trip 222c and engagement portion 221c and form aforesaid return channel 22.On the other hand, combination definable by first reflux assembly 221 and second reflux assembly 222 goes out a backflow hole 223, the return flow line 214 on backflow hole 223, the nut body 21 and the mutual close communication of aforesaid ball channel and constitute a ball-recirculation approach.
Certainly, in other embodiments, can also be with the location swap of trip and engagement portion, or on two reflux assemblies, other engaging or fixed structure are set additionally, about the shape of trip and engagement portion, position and all non-the utility model of quantity institute limitr are set.
Fig. 1 D is the combination schematic representation of the return channel of the ball screw shown in Fig. 1 C, please refer to shown in Fig. 1 C and Fig. 1 D, after first reflux assembly 221 and second reflux assembly 222 were combined to form return channel 22, two reflux assemblies can form a leak stoppage structure L jointly simultaneously.Specifically, first reflux assembly 221 has a slot part 221d in the first clamping face 221a, and second reflux assembly 222 has a protuberance 222d in the second clamping face 222a, and the shape of protuberance 222d with the effect that the position produces similar eaves is set.Protuberance 222d and slot part 221d be the common leak stoppage structure L that forms when first, second reflux assembly 221,222 engages mutually.Protuberance 222d and the slot part 221d of present embodiment indication refers in particular to " ending oily protuberance " and " ending oil groove portion ", specifically, because the directional ring that arranges of protuberance 222d and slot part 221d is around in part ball-recirculation approach CP in the return channel 22, so when lubricant oil when this part ball-recirculation approach CP oozes out, because will pass through protuberance 222d and the formed leak stoppage structure L with at least twice bending of slot part 221d, also be difficult for oozing out again return channel 22 surfaces, in other words, see it (shown in Fig. 1 D) by the outward appearance of return channel, the first clamping face 221a and the formed slit 224 of the second clamping face 222a are not the shape for straight line, and present the configuration (having twice bending) of a labyrinth-like.Be with, design by leak stoppage structure L, return channel 22 can prevent that the lubricant oil that is added into backflow hole 223, return flow line 214 and ball channel from being oozed out by the slit 224 between first, second reflux assembly 221,222, better, can prevent the oil seepage problem that knockdown return channel 22 produces when the problem on deformation that is subjected to external force or produces because of heat treatment.
What must illustrate especially is, first reflux assembly 221 of present embodiment is provided with two slot part 221d in two sides of the first clamping face 221a, and be provided with two protuberance 222d in corresponding two the slot part 221d of second reflux assembly 222, by this can be further on the return channel 22 easily two of seepage leak-stopping is provided, prevent the effect of oozing out, only in practical application, can also be with the location swap of slot part 221d and protuberance 222d, or in first, second reflux assembly 221, other leak stoppage structure L additionally is set on 222, in addition, about the shape of slot part 221d and protuberance 222d, the all non-the utility model of position and quantity institute limitr is set.
Fig. 1 E is that the ball screw shown in Figure 1A is in the generalized section at hatching A-A place.Please refer to shown in Figure 1B and Fig. 1 E, in present embodiment, nut body 21 has two winding inclined-planes 215,216 in assembling opening 212,213 both sides, and return channel 22 arranges face 221b, 222b with first, second of two reflux assembly and contacts with two winding inclined-planes 215,216 of nut body 21 respectively, certainly, first, second arranges face 221b, 222b and has the gradient corresponding with this two windings inclined-plane 215,216.
Hold above-mentionedly, shown in Fig. 1 E, two winding inclined-planes 215,216 extension have an angle of cut θ, and certainly, " extension " of indication is virtual extension herein.Wherein, the angle of angle of cut θ can be between 1～170 degree.By the design of gradient, can prevent effectively that return channel 22 from toward the direction displacement of screw rod 1, producing spacing effect.In present embodiment, alleged winding inclined-plane 215,216 extension refer to extend towards the direction of the axis of nut body 21, and what must illustrate especially is that " direction of axis " of the nut body 21 of indication refers to the direction parallel with the major axis of screw rod 1 herein.Particularly, present embodiment two winding inclined-planes 215,216 present a shape that extends out with respect to screw rod 1, when combination return channel 22, have the advantage of the assembling of promoting and location easness.
In addition, in present embodiment, return channel 22 with screw 23 respectively with each reflux assembly screw lock in nut body 21, non-limiting person for this reason, in practical application, return channel 22 also can be fixed in nut body 21 by engaging, bonding, mode sealed, chimeric or its combination, or even at the contact position of return channel 22 with nut body 21, add viscose by the first end face ES1 or the second end face ES2 outside and bind, do not limit in this.
In addition, in the present embodiment, ball screw has two dust preventing component 24.Dust preventing component 24 has more a positioning part 241, and when dust preventing component 24 was assembled with nut body 21, two positioning parts 241 were individually fixed in the assembling opening 212,213.Compared to the combination of existing dust preventing component, the utility model by winding inclined-plane 215,216 with the cooperating of the positioning part 241 of dust preventing component 24, exempted the additional step of screw locking, simplified the combination of dust preventing component 24 with nut body 21; More preferably, because positioning part 241 is fixed in assembling opening 212, can't rotates in 213, the effect that provides restriction dust preventing component 24 to rotate, and then dust preventing component 24 is provided give the better dustproof effect of nut body 21.
In addition, dust preventing component 24 has more a tongue 242, and tongue 242 is arranged on the some of inner edge 243 of dust preventing component 24.Specifically, the part that tongue 242 is defined out by continuing on the inner edge 243 to extend to the center of dust preventing component 24, and the shape that extends out is ligulate or semilune, so can be referred to as by tongue 242.Then in fact the utility model is not limited with above-mentioned shape, in practical application, even shape is not exclusively similar to ligulate or semilune, and the also scope that contains for the utility model.
By the combination of above-mentioned each parts, can sheathed nut body 21 in screw rod 1, form ball channel with nut body 21, return channel 22 and 1 of screw rod, and a plurality of balls 3 be placed in this ball channel.Only the actual start of ball screw S and application mode are that the utility model person with usual knowledge in their respective areas can the person of understanding, repeat no more in this.
Fig. 2 is the generalized section according to the ball screw shown in another embodiment of the utility model, please refer to shown in Figure 2, in present embodiment, the nut body 21 ' of ball screw and the have identical a plurality of features of return channel 22 ' with previous embodiment, only two winding inclined-planes 215 ', 216 ' extension are away from the direction of the axis of nut body 21 ', particularly, present embodiment two winding inclined-planes 215 ', 216 ' present the shape of an indent with respect to screw rod 1 ', and better dustproof effect is provided in addition.
In sum, according to ball screw of the present utility model, connect the outer surface of nut body and the assembling opening of internal surface by formation on the nut body, for the return channel setting.Specifically, the assembling opening not only connects this inside and outside of nut, and the end face from the nut body extends to the direction of other end, and therefore assembling opening presents an open hatch frame with respect to the nut body, is fit to use open processing method to make.And open processing method, for example turnning and milling etc. is relatively easy, and is easy to the manufacturing process of QC.
Only on the outer surface of nut body or end face, form non-through groove structure compared to existing, the utility model need not additionally to consider whether the meat of nut body is thick enough, and do not have because cause the meat thicknessization through processing, after after heat treatment, be easy to generate the big and cracked problem easily of heat distortion amount.Moreover ball screw of the present utility model also is difficult for producing distortion at the assembling opening in course of working, influences follow-up assembly precision.
Generally speaking, ball screw of the present utility model can be finished by easy procedure for processing because of the particular design of its structure, the difficulty that not only significantly reduces processing with expend time in, the more accuracy of manufacturing that can improve further and yield, the stability when promoting the ball screw overall operation.
The above only is illustrative, and non-limiting.Anyly do not break away from spirit of the present utility model and category, and to its equivalent modifications of carrying out or change, all should be contained in the appended claim.
Symbol description
(having now)
Do not have
(the utility model)
1,1 ': screw rod
11: rail slot
2: nut
21,21 ': the nut body
211: interior ball grooves
212,213: the assembling opening
214: the return flow line
215,215 ', 216,216 ': the winding inclined-plane
22,22 ': return channel
221: the first reflux assemblies
221a: the first clamping face
221b: first arranges face
221c: engagement portion
221d: slot part
222: the second reflux assemblies
222a: the second clamping face
222b: second arranges face
222c: trip
222d: protuberance
223: the backflow hole
224: the slit
23: screw
24: dust preventing component
241: the positioning part
242: tongue
243: inner edge
3,3 ': ball
A: hatching
CP: circulation approach
ES1: first end face
ES2: second end face
IS: internal surface
L: leak stoppage structure
OS: outer surface
S: ball screw
θ: the angle of cut.
Claims (10)
1. ball screw comprises:
One screw rod;
One nut is slidedly arranged on described screw rod, and has a ball channel between described nut and described screw rod, and described nut comprises:
One nut body has at least one assembling opening, and its end face from described nut body extends to the direction of other end, and connects outer surface and the internal surface of described nut body; And
At least one return channel is arranged at described assembling opening; And
A plurality of balls are placed in described ball channel.
2. ball screw as claimed in claim 1, wherein said return channel comprises that two reflux assemblies and described two reflux assemblies have a clamping face respectively and with respect to one of described clamping face face are set, and described return channel arranges face with described two and contacts with described nut body.
3. ball screw as claimed in claim 2, one of them has a trip in described clamping mask wherein said two reflux assemblies, wherein another has an engagement portion in described clamping mask, and described two reflux assemblies engage mutually by described trip and described engagement portion.
4. ball screw as claimed in claim 2, one of them has a protuberance in described clamping mask wherein said two reflux assemblies, wherein another has a slot part in described clamping mask, and described protuberance and described slot part common leak stoppage structure that forms when described two reflux assemblies engage mutually.
5. ball screw as claimed in claim 4, wherein said reflux assembly has two described protuberances respectively in two sides of described clamping face, and another described reflux assembly has two described slot parts respectively in two sides of described clamping face.
6. ball screw as claimed in claim 2, wherein said nut body has two winding inclined-planes in the both sides of described assembling opening, the extension on described two winding inclined-planes has an angle of cut, and described return channel arranges face with described two and contacts with the described two winding inclined-planes of described nut body.
7. ball screw as claimed in claim 6, the angle of the wherein said angle of cut is between 1～170 degree.
8. ball screw as claimed in claim 6, the extension on wherein said two winding inclined-planes is towards the direction of the axis of described nut body.
9. ball screw as claimed in claim 6, the extension on wherein said two winding inclined-planes is away from the direction of the axis of described nut body.
10. ball screw as claimed in claim 1, wherein said nut also comprises at least one dust preventing component, described dust preventing component has a positioning part, and described positioning part is fixed in the described assembling opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320166375 CN203176289U (en) | 2013-04-03 | 2013-04-03 | Ball screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320166375 CN203176289U (en) | 2013-04-03 | 2013-04-03 | Ball screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203176289U true CN203176289U (en) | 2013-09-04 |
Family
ID=49072989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320166375 Expired - Lifetime CN203176289U (en) | 2013-04-03 | 2013-04-03 | Ball screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203176289U (en) |
-
2013
- 2013-04-03 CN CN 201320166375 patent/CN203176289U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130904 |