CN201335131Y - Differential thread displacement device - Google Patents
Differential thread displacement device Download PDFInfo
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- CN201335131Y CN201335131Y CNU2009201051081U CN200920105108U CN201335131Y CN 201335131 Y CN201335131 Y CN 201335131Y CN U2009201051081 U CNU2009201051081 U CN U2009201051081U CN 200920105108 U CN200920105108 U CN 200920105108U CN 201335131 Y CN201335131 Y CN 201335131Y
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- screw thread
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Abstract
A differential thread displacement device comprises a frame, a movable base, a movable guiding rail, a screw rod, nuts and a runner. The frame is fixedly connected with the movable guiding rail; the movable base is connected with the movable guiding rail in a sliding manner; the runner is fixedly connected with the screw rod; two threads are formed on the screw rod, which are a first thread and a second thread respectively; the thread pitches of the two threads are different; the number of the nuts is two, wherein, one is a fixed nut and fixedly connected with the frame, and the other is a movable nut and fixedly connected with the movable base; threads of the two nuts are respectively matched with the first thread and the second thread; the fixed nut is mounted on the first thread; and the movable nut is mounted on the second thread. When the screw rod rotates for a circle, the movable nut moves for the difference or the sum of the thread pitches of the two threads, thereby realizing minute distance displacement or large-scale displacement.
Description
Technical field
The utility model relates to a kind of screw thread Displacement system, particularly a kind of differential thread Displacement system.
Background technique
Adopt thread mechanism to rotatablely move to be converted to mobile, have accurate, steady, reliable characteristics, so in the equipments such as machinery, instrument and apparatus, often use thread mechanism to realize the displacement of component, but, the only suitable displacement amount of realizing mesoscale of common screw thread Displacement system.Too small displacement amount, because the pitch of screw thread is subjected to the restriction of process conditions, can not do too for a short time, when the screw rod nominal diameter is not less than 1 millimeter, pitch generally should not be less than 0.2 millimeter, and too little pitch can make the strength and stiffness of thread mechanism obviously reduce, transmitting movement reliablely and stablely, more can't transferring power: excessive pitch can make the constraint deficiency of screw rod to nut, causes the nut operation not steady, in order to improve the steep-pitch thread mechanism stability, just need to use multiple thread mechanism, but the manufacture cost height of multiple thread mechanism, machining error is big, can't realize accurate transmission of movement and transmission of power.Because thread mechanism is realized the method for displacement bigger narrow limitation is arranged, in order to realize micro-displacement or large scale displacement, just thread mechanism and linkage mechanism or gear mechanism etc. need be used, but this has obviously increased design and manufacture cost again, has strengthened the size and the weight of product.
The model utility content
Can't realize the deficiency of micro-displacement and large scale displacement in order to remedy the regular screw threads displacement mechanism, the utility model proposes a kind of differential thread Displacement system, employed technological scheme is: the differential thread Displacement system, comprise frame, move seat, moving railing, screw rod, nut and runner, frame is fixedlyed connected with moving railing, moving seat is slidingly connected with moving railing, runner is fixedlyed connected with screw rod, 2 sections screw threads are set on the screw rod, are respectively first screw thread and second screw thread, the pitch of 2 sections screw threads is inequality, nut is 2, one is set screw nut and fixedlys connected with frame, another be travelling nut and with move seat and fixedly connected, the screw thread of 2 nuts adapts with first screw thread and second screw thread respectively, set screw nut is installed on first screw thread, and travelling nut is installed on second screw thread.
First screw thread and second screw thread, thread rotary orientation is identical.
First screw thread and second screw thread, thread rotary orientation is inequality.
First screw thread and second screw thread, nominal diameter is identical.
First screw thread and second screw thread, nominal diameter is inequality.
First screw thread and second screw thread, thread rotary orientation is inequality, and the pitch of screw thread is identical.
First screw thread and second screw thread, thread rotary orientation is inequality, and one section screw thread at least wherein is a multiple thread.
The connection part of screw rod and nut is provided with thread pitch and eliminates mechanism.
Use differential thread Displacement system of the present utility model, the technique effect that can obtain is: the screw rod of differential thread Displacement system is provided with 2 sections screw threads that pitch is inequality, the screw thread of 2 nuts adapts with first screw thread and second screw thread respectively, when screw rod revolves when turning around, travelling nut moves difference or 2 sections thread pitch sums of 2 sections thread pitch, thereby can realize slight distance displacement or large scale displacement.
First screw thread and second screw thread, thread rotary orientation is identical, and screw rod is revolved when turning around, and travelling nut moves the poor of 2 sections thread pitch.Under the diameter of in adopting the regular screw threads NBS, stipulating and the numerical value situation of pitch, when the external diameter of screw thread is 2.5 millimeters, the pitch of one section screw thread adopts 0.45 millimeter coarse thread pitch, when the pitch of another section screw thread adopts 0.35 millimeter closely-pitched pitch, screw rod revolves and turns around, travelling nut moves 0.45 millimeter-0.35 millimeter=0.1 mm distance, has only the less than 30% of 0.35 millimeter of minimum pitch under the screw thread normal condition of 2.5 mm dias.Consider the screw thread Displacement system that is used for precision optical machinery or instrument, belong to the special circumstances under the extreme service condition, if be not subjected to the numerical limits of diameter and pitch in the regular screw threads NBS, use differential thread Displacement system of the present utility model, just can design and produce and satisfy the screw thread Displacement system that needed any displacement amount is adjusted in precision optical machinery or instrument displacement.
First screw thread and second screw thread, thread rotary orientation is inequality, and screw rod is revolved when turning around, and travelling nut moves 2 sections thread pitch sums.Under the diameter of in adopting the regular screw threads NBS, stipulating and the numerical value situation of pitch, when the external diameter of screw thread is 2.5 millimeters, the pitch of one section screw thread adopts 0.45 millimeter coarse thread pitch, when the pitch of another section screw thread adopts 0.35 millimeter closely-pitched pitch, screw rod revolves and turns around, travelling nut moves 0.45 millimeter+0.35 millimeter=0.8 mm distance, surpasses 1.7 times of 0.45 millimeter of maximum pitch under the screw thread normal condition of 2.5 mm dias.Because the common precision of screw thread of little nominal diameter is higher, use the screw thread of little nominal diameter, fine pitch to realize the large scale displacement, can improve displacement accuracy.
First screw thread and second screw thread, nominal diameter is identical, can simplified design, manufacturing work, make the index such as intensity, rigidity, working life of 2 sections helical thread portions close, help realizing the conformity of each component life.
First screw thread and second screw thread, nominal diameter is inequality, under the diameter that can in adopting the regular screw threads NBS, stipulate and the numerical value situation of pitch, design more, the differential thread Displacement system of micro displacement numerical value more, for example: when the external diameter that adopts one section screw thread is 3 millimeters, pitch is 0.5 millimeter coarse thread pitch, the external diameter of another section screw thread is 2.5 millimeters, when pitch is 0.45 millimeter coarse thread pitch, screw rod revolves and turns around, travelling nut moves 0.5 millimeter-0.45 millimeter=0.05 mm distance, has been under the situation of manual tune, the least limit yardstick that can reach.Even under need situation than the major thread diameter, adopt nominal diameter first screw thread and second screw thread inequality, still how obtain micro displacement, the external diameter of one section screw thread is 6 millimeters as adopting wherein, and pitch is 0.75 millimeter closely-pitched pitch, and the external diameter of another section screw thread is 5 millimeters, when pitch is 0.8 millimeter coarse thread pitch, not only can obtain bigger driving force, and screw rod revolves and turn around, travelling nut only moves 0.8 millimeter-0.75 millimeter=0.05 millimeter slight distance.Adopt two sections different screw threads of nominal diameter, can also under the situation that obtains micro-displacement, use the standard thread cutter to process first screw thread and second screw thread, reduced processing cost, guaranteed machining accuracy.
First screw thread and second screw thread, thread rotary orientation is inequality, and the pitch of screw thread is identical, and when screw rod revolves when turning around, travelling nut moves 2 times of pitch, under the prerequisite that realizes the large scale displacement, has simplified design, manufacturing work, has made things convenient for operation.
First screw thread and second screw thread, thread rotary orientation is inequality, and one section screw thread at least wherein is a multiple thread, can further strengthen screw rod and revolve when turning around the yardstick that travelling nut moves.
The connection part of screw rod and nut is provided with thread pitch and eliminates mechanism, can realize eliminating the influence of thread pitch in the process of micro-displacement and large scale displacement at the differential thread Displacement system, guarantees precision, repeatability and the stability of displacement.
Use differential thread Displacement system of the present utility model, can utilize that structure is the simplest, cost is minimum, make the Displacement system of most convenient, realize micro-displacement and large scale displacement that the regular screw threads Displacement system can't be realized.The technological scheme that the utility model proposed, not only can be applied to v thread, can also be applied to thread mechanism commonly used such as trapezoidal thread, square threaded form, except the thread mechanism that is applied to sliding friction, also can be applied to the thread mechanism of rolling friction, make differential thread Displacement system of the present utility model can adapt to the demand of multiple motion and transmission of power
Description of drawings
Accompanying drawing 1 is differential thread Displacement system first screw thread of the present utility model and the identical structural representation of the second screw thread nominal diameter.
Accompanying drawing 2 is differential thread Displacement system first screw thread of the present utility model and second screw thread nominal diameter structural representation inequality.
Sign implication in the accompanying drawing is as follows:
The 1-frame, 2-moves seat, 3-moving railing, 4-screw rod, 5-first screw thread, 6-second screw thread, 7-set screw nut, 8-travelling nut, 9-runner, 10-spring.
Embodiment
| The rotation direction relation of |
|
| Identical | The pitch difference of |
| Inequality | The pitch of |
The nominal diameter of first screw thread 5 and second screw thread 6 can be identical or inequality, and nominal diameter is identical, can simplified design, manufacturing work, and make the index such as intensity, rigidity, working life of 2 sections helical thread portions close, help realizing the conformity of each component life; Nominal diameter is inequality, under the diameter that can stipulate in adopting the regular screw threads NBS and the numerical value situation of pitch, designs differential thread Displacement system more, more micro displacement numerical value.Consider the screw thread Displacement system that is used for precision optical machinery or instrument, belong to the special circumstances under the extreme service condition, can not be subjected to the numerical limits of diameter and pitch in the regular screw threads NBS in case of necessity, design and produce and satisfy the screw thread Displacement system that any displacement amount of needs is adjusted in precision optical machinery or instrument displacement.Adopt under the numerical value situation of the diameter stipulated in the regular screw threads NBS and pitch, 2 sections screw thread nominal diameters are identical and inequality, selectable pitch difference and pitch be exemplified below table:
| The nominal diameter of 2 sections screw threads | Selectable pitch | Attainable pitch difference | Attainable pitch and |
| Identical 2.5 millimeters | 0.35 the millimeter, 0.45 millimeter | 0.1 millimeter | 0.8 millimeter |
| 2.5 the millimeter, 3 millimeters | 0.35 the millimeter, 0.45 millimeter, 0.5 millimeter | 0.05 the millimeter, 0.1 millimeter, 0.15 millimeter | 0.8 the millimeter, 0.85 millimeter, 0.95 millimeter |
When the thread rotary orientation of first screw thread 5 and second screw thread 6 was inequality, the pitch of first screw thread 5 and second screw thread 6 can be identical, and at this moment screw rod 4 revolves when turning around, move seat 2 and move 2 times of pitch, under the prerequisite that realizes the large scale displacement, simplified design, manufacturing work, made things convenient for operation.
When the thread rotary orientation of first screw thread 5 and second screw thread 6 was inequality, one section screw thread at least wherein was a multiple thread, can further strengthen screw rod 4 and revolve when turning around, and moved seat 2 yardsticks that move.
Accompanying drawing 2 is differential thread Displacement system first screw thread 5 of the present utility model and second screw thread, 6 nominal diameters structural representation inequality, and its principle is identical with accompanying drawing 1.
Use differential thread Displacement system of the present utility model, can utilize that structure is the simplest, cost is minimum, make the Displacement system of most convenient, realize micro-displacement and large scale displacement that the regular screw threads Displacement system can't be realized.The technological scheme that the utility model proposed, not only can be applied to v thread, can also be applied to thread mechanism commonly used such as trapezoidal thread, square threaded form, except the thread mechanism that is applied to sliding friction, also can be applied to the thread mechanism of rolling friction, make differential thread Displacement system of the present utility model can adapt to the demand of multiple motion and transmission of power
Differential thread Displacement system of the present utility model on the basis of the foregoing description, adopts the embodiment that method produced of replacement or conversion, all within protection domain of the present utility model.
Claims (8)
1, the differential thread Displacement system, comprise frame, move seat, moving railing, screw rod, nut and runner, frame is fixedlyed connected with moving railing, moving seat is slidingly connected with moving railing, runner is fixedlyed connected with screw rod, it is characterized in that: 2 sections screw threads are set on the screw rod, are respectively first screw thread and second screw thread, the pitch of described 2 sections screw threads is inequality, nut is 2, one is set screw nut and fixedlys connected with frame, another be travelling nut and with move seat and fixedly connected, the screw thread of described 2 nuts adapts with first screw thread and second screw thread respectively, set screw nut is installed on first screw thread, and travelling nut is installed on second screw thread.
2, the described differential thread Displacement system of claim 1, it is characterized in that: described first screw thread and second screw thread, thread rotary orientation is identical.
3, the described differential thread Displacement system of claim 1, it is characterized in that: described first screw thread and second screw thread, thread rotary orientation is inequality.
4, the described differential thread Displacement system of claim 1, it is characterized in that: described first screw thread and second screw thread, nominal diameter is identical.
5, the described differential thread Displacement system of claim 1, it is characterized in that: described first screw thread and second screw thread, nominal diameter is inequality.
6, the described differential thread Displacement system of claim 3 is characterized in that: described first screw thread and second screw thread, and thread rotary orientation is inequality, and the pitch of screw thread is identical.
7, the described differential thread Displacement system of claim 3 is characterized in that: described first screw thread and second screw thread, and thread rotary orientation is inequality, and one section screw thread at least wherein is a multiple thread.
8, the described differential thread Displacement system of claim 1 is characterized in that: the connection part of described screw rod and nut is provided with thread pitch and eliminates mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201051081U CN201335131Y (en) | 2009-01-14 | 2009-01-14 | Differential thread displacement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009201051081U CN201335131Y (en) | 2009-01-14 | 2009-01-14 | Differential thread displacement device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201335131Y true CN201335131Y (en) | 2009-10-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009201051081U Expired - Fee Related CN201335131Y (en) | 2009-01-14 | 2009-01-14 | Differential thread displacement device |
Country Status (1)
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| CN (1) | CN201335131Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102840820A (en) * | 2012-08-29 | 2012-12-26 | 西安理工大学 | Fine adjustment device for capacitive sensor |
| CN103101336A (en) * | 2013-02-25 | 2013-05-15 | 温州博览展示器材有限公司 | Spray head frame of printer |
| CN105114578A (en) * | 2015-07-28 | 2015-12-02 | 重庆长安汽车股份有限公司 | Quick high-precision micro-distance adjusting device |
| CN108544024A (en) * | 2018-05-18 | 2018-09-18 | 丹阳市宝利锯业机械有限公司 | A kind of longitudinal fine tuning differential attachment of gear grinding machines feed mechanism |
| CN111487742A (en) * | 2020-05-29 | 2020-08-04 | 中国科学院长春光学精密机械与物理研究所 | Differential heavy-load fine adjustment mechanism |
| CN112436673A (en) * | 2020-12-03 | 2021-03-02 | 大连交通大学 | Magnetic stepless speed regulator for differentially adjusting magnetic gap |
-
2009
- 2009-01-14 CN CNU2009201051081U patent/CN201335131Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102840820A (en) * | 2012-08-29 | 2012-12-26 | 西安理工大学 | Fine adjustment device for capacitive sensor |
| CN102840820B (en) * | 2012-08-29 | 2015-06-03 | 西安理工大学 | Fine adjustment device for capacitive sensor |
| CN103101336A (en) * | 2013-02-25 | 2013-05-15 | 温州博览展示器材有限公司 | Spray head frame of printer |
| CN103101336B (en) * | 2013-02-25 | 2015-12-23 | 温州博览展示器材有限公司 | A kind of printer head frame |
| CN105114578A (en) * | 2015-07-28 | 2015-12-02 | 重庆长安汽车股份有限公司 | Quick high-precision micro-distance adjusting device |
| CN108544024A (en) * | 2018-05-18 | 2018-09-18 | 丹阳市宝利锯业机械有限公司 | A kind of longitudinal fine tuning differential attachment of gear grinding machines feed mechanism |
| CN111487742A (en) * | 2020-05-29 | 2020-08-04 | 中国科学院长春光学精密机械与物理研究所 | Differential heavy-load fine adjustment mechanism |
| CN112436673A (en) * | 2020-12-03 | 2021-03-02 | 大连交通大学 | Magnetic stepless speed regulator for differentially adjusting magnetic gap |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091028 Termination date: 20110114 |