CN203442063U - Rolling and sliding composite lead screw pair - Google Patents
Rolling and sliding composite lead screw pair Download PDFInfo
- Publication number
- CN203442063U CN203442063U CN201320509001.XU CN201320509001U CN203442063U CN 203442063 U CN203442063 U CN 203442063U CN 201320509001 U CN201320509001 U CN 201320509001U CN 203442063 U CN203442063 U CN 203442063U
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- nut
- sliding
- rolling
- ball
- screw
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- Expired - Fee Related
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Abstract
A rolling and sliding composite lead screw pair comprises a nut base, wherein a rolling nut is fixedly connected to the nut base, a ball screw is connected to the interior of the rolling nut through a steel ball, a sliding nut is further connected to the ball screw in a threaded mode, the sliding nut is fixedly connected with the nut base, an adjusting cushion is arranged between the sliding nut and the nut base, and a gap is reserved between the sliding nut and the nut base.
Description
Technical field
The utility model relates to a kind of lathe, relates in particular to a kind of rolling, the compound lead screw pair of sliding.
Background technique
The feed mechanism of most of lathes is all straight line motion, its power source mostly is and rotatablely moves again, a kind of Linear feed mechanism the most frequently used on lathe is screw-nut body, different with purposes according to the precision of lathe, screw-nut body can be divided into Mechanism of Sliding Leadscrew Nut, ball-screw nut body and static-pressure screw nut mechanism three classes.Mechanism of Sliding Leadscrew Nut screw pair produces the spiral of sliding friction while doing relative movement, relatively simple for structure, the engagement of nut and screw rod is continuous, stable working, is easy to self-locking, but between screw thread, friction is large, wearing and tearing are large, efficiency is low (generally between 0.25 ~ 0.70, during self-locking, efficiency is less than 50%), low speed and fine setting easily produce and creep, and positioning precision and axial stiffness are poor, are not suitable for for high speed and high-power transmission; Ball-screw nut screw pair produces the spiral of rolling friction while doing relative movement, and the surface friction drag of rolling screw is little, and transmission efficiency high (more than 90%), weares and teares little, and precision easily keeps, but complex structure, cost is high, can not self-locking.The occasion that rolling screw is mainly used in transmission accuracy to have relatively high expectations.Static-pressure screw nut mechanism be by static pressure application of principle in power screw, static-pressure screw nut mechanism surface friction drag is little, transmission efficiency high (can reach more than 90%), but complex structure, need oil supply system, be applicable to require in highi degree of accuracy, high efficiency important transmission, in the power screw of numerical control, precision machine tool, testing apparatus or automatic control system.
Summary of the invention
The purpose of this utility model is to provide that a kind of transmission efficiency is high, rolling, the compound lead screw pair of sliding that can self-locking.
For achieving the above object, the technical solution adopted in the utility model is: a kind of rolling, the compound lead screw pair of sliding, comprise nut seat, on nut seat, be fixedly connected with ball nut, in ball nut, by steel ball, be connected with ball screw, it is characterized in that: the sliding nut that has also been threaded on ball screw, sliding nut is fixedly connected with nut seat, between sliding nut and nut seat, be designed with spacer, between sliding nut and nut seat, be designed with gap.
The utility model has the advantages of and be: due to this structure of the present utility model, so 1, transmission efficiency is high, can reach more than 90%, and lead screw pair response equivalent is high, low speed is without creeping;
2, by spacer, can be suitable to ball pretension, reach high rigidity, and heating value is lower than ball screw pair, and can there is auto-lock function;
3, adopt ball transmitting torque, the life-span of lead screw pair is 4-10 times of slip screw, and positioning precision and repetitive positioning accuracy higher than lead screw.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
In accompanying drawing: 1, ball nut; 2, steel ball; 3, nut seat; 4, sliding nut; 5, spacer; 6, ball screw.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
The utility model as shown in Figure 1, a kind of rolling, the compound lead screw pair of sliding, comprise nut seat 3, on nut seat 3, be fixedly connected with ball nut 1, in ball nut 1, by steel ball 2, be connected with ball screw 6, it is characterized in that: the sliding nut 4 that has also been threaded on ball screw 6, sliding nut 4 is fixedly connected with nut seat 3, between sliding nut 4 and nut seat 3, be designed with spacer 5, between sliding nut 4 and nut seat 3, be designed with gap.In the present embodiment, described gap is 2mm.
Spacer can be in order to adjust the pretension amount between ball screw and two nuts, and spacer and sliding nut are mainly used in the secondary whole rigidity of adjusting screw and realize auto-lock function.During work, ball screw transmitting torque is mainly converted into straight line motion by ball nut.
Claims (2)
1. a rolling, the compound lead screw pair of sliding, comprise nut seat (3), on nut seat (3), be fixedly connected with ball nut (1), in ball nut (1), by steel ball (2), be connected with ball screw (6), it is characterized in that: sliding nut (4) has also been threaded on ball screw (6), sliding nut (4) is fixedly connected with nut seat (3), between sliding nut (4) and nut seat (3), be designed with spacer (5), between sliding nut (4) and nut seat (3), be designed with gap.
2. rolling according to claim 1, the compound lead screw pair of sliding, is characterized in that: described gap is 2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320509001.XU CN203442063U (en) | 2013-08-20 | 2013-08-20 | Rolling and sliding composite lead screw pair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320509001.XU CN203442063U (en) | 2013-08-20 | 2013-08-20 | Rolling and sliding composite lead screw pair |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203442063U true CN203442063U (en) | 2014-02-19 |
Family
ID=50093120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320509001.XU Expired - Fee Related CN203442063U (en) | 2013-08-20 | 2013-08-20 | Rolling and sliding composite lead screw pair |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203442063U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103410940A (en) * | 2013-08-20 | 2013-11-27 | 山东威达重工股份有限公司 | Rolling and sliding composite lead screw pair |
-
2013
- 2013-08-20 CN CN201320509001.XU patent/CN203442063U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103410940A (en) * | 2013-08-20 | 2013-11-27 | 山东威达重工股份有限公司 | Rolling and sliding composite lead screw pair |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140219 Termination date: 20210820 |