CN1300489C - Screw reversing mechanism in a state of rolling friction - Google Patents
Screw reversing mechanism in a state of rolling friction Download PDFInfo
- Publication number
- CN1300489C CN1300489C CNB2004100409791A CN200410040979A CN1300489C CN 1300489 C CN1300489 C CN 1300489C CN B2004100409791 A CNB2004100409791 A CN B2004100409791A CN 200410040979 A CN200410040979 A CN 200410040979A CN 1300489 C CN1300489 C CN 1300489C
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- China
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- pin
- fixed
- screw nut
- nut
- swing body
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Abstract
The present invention relates to a spiral reverse mechanism in the state of rolling friction, which is mainly composed of an upper stop block, a limit stop, a lower stop block, screw rod, a fixed-point pin, a floating pin, a swing body, a screw nut and a guide rod, wherein the fixed-point pin positioned in the screw nut can rotate along the shaft line of the fixed-point pin; the floating pin eccentrically positioned in the swing body can rotate along the shaft line of the floating pin; the swing body is positioned in the screw nut, and a sliding bearing is arranged between the swing body and the screw nut which can rotate correspondingly; the limit stop is fixed to the swing body; the upper stop block and the lower stop block are fixed to the screw nut; the screw nut moves upwards and downwards along the guide rod. The present invention has the technical scheme that slide blocks in the spiral reverse mechanism are replaced by double pins, and a continuous single-direction rotation motion is changed into a reciprocating rectilinear motion by left spiral lines and right spiral lines with the front ends and the tail ends connected; sliding friction is changed into rolling friction. The present invention has the advantages of simple and novel structure, reliable performance, high transmission efficiency, high motion speed and long service life.
Description
Technical field
The present invention relates to be in the spiral changement of rolling friction state.
Background technique
In now using the spiral changement that unidirectional rotary motion is changed into linear reciprocating motion, because the intersection of helix on screw rod of two left and right rotation directions, make on the helicoid and " ditch " occurred, for the driving component on the nut that makes changement can be crossed these " ditches ", driving component has to adopt length greater than " ditch " wide slide block.So this mechanism is in the sliding friction state at the volley, the mill resistance is big, efficient is low, movement velocity is slow, the relative movement part life-span short.
Summary of the invention
The object of the present invention is to provide the spiral changement that is in the rolling friction state, the left and right helix that revolves that this mechanism utilizes tandem array changes continuous unidirectional rotary motion into linear reciprocating motion, novel structure, reliable performance, the working efficiency and the working life of having improved changement.
The present invention is achieved in that in the spiral changement driving component on the nut becomes the rolling friction transmission with the sliding friction transmission, to improve transmission efficiency with replacing slide block around the pin that self axis rotates.
Be in the spiral changement of rolling friction state, it is characterized in that, mainly by upper limit position block, block, lower position block, screw rod, the fixed point pin, pin floats, swing member, nut, guide rod is formed, described fixed point pin is arranged in nut, can be along himself rotational, described unsteady pin is arranged in swing member, can be along himself rotational, described swing member is arranged in nut, and sliding bearing is arranged between the two, can relatively rotate, described block is fixed on the swing member, described upper limit position block, lower position block is fixed on the nut, and described nut can move up and down along guide rod, but can not rotate around screw rod.
The present invention changes the sliding friction transmission with the spiral changement now into the rolling friction transmission with replacing slide blocks around two pins that self axis rotates.
Fall into for fear of the transmission pin in " ditch " of left and right sides helix infall, transmission can not be carried out, the present invention has adopted double-pin (the fixed point pin and the pin that floats) structure, during work, the alternately carrying of two pins, alternately the helix by left and right rotation direction intersects in formed " ditch ", thereby realizes continuous transmission.
When two pins respectively are in diverse location in the spiral chute that becomes the lift angle section, the pitch difference of Chan Shenging at the volley, the swing by swing member compensates.I.e. swing by swing member makes the unsteady displacement that produces on the screw axis direction of selling, and becomes the pitch difference that lift angle spiral fluted diverse location is caused, " stuck " phenomenons of avoiding two pins to produce because of the lift difference to compensate to float to sell and fix a point to sell because of being in.
Compared with prior art, the present invention has following beneficial effect:
(1) the present invention replaces the slide block in the spiral changement with the double-pin filial generation, utilize the left and right helix that revolves of tandem array, the mechanism continuous unidirectional rotary motion changes linear reciprocating motion into becomes rolling friction with sliding friction, novelty simple in structure, reliable performance;
(2) the present invention the time is in commutation and waits acceleration, uniform retarded motion state, is in the uniform speed motion state during work done;
(3) the present invention has improved transmission efficiency, movement velocity and mechanism's life-span greatly.
Description of drawings
Fig. 1 is a spiral changement plan view of the present invention
Fig. 2 is a spiral changement plan view of the present invention
Fig. 3 is a spiral changement principle schematic of the present invention
Embodiment
Describe concrete details and the working condition of installing of the present invention in detail below in conjunction with Fig. 1, Fig. 2 and Fig. 3.
Be in the spiral changement of rolling friction state, mainly by upper limit position block 1, block 2, lower position block 3, screw rod 4, fixed point pin 5, pin 6 floats, swing member 7, nut 8, guide rod 9 is formed, described fixed point pin 5 is arranged in nut 8, can be along himself rotational, described unsteady pin 6 is arranged in swing member 7, can be along himself rotational, described swing member 7 is arranged in nut 8, sliding bearing is arranged between the two, can relatively rotate, described block 2 is fixed on the swing member 7, described upper limit position block 1, lower position block 3 is fixed on the nut 8, described nut 8 can move up and down along guide rod 9, but can not rotate around screw rod 4.
When main shaft turns clockwise, that floats that pin 6 and fixed point pin 5 all be arranged in the right-hand screw groove waits the lift angle section, load on the nut is downward at this moment, the pin 6 that floats is subjected to the counter-force of the following groove face of right-hand screw groove, force the block 2 on the swing member 7 to kill on lower position block 3, so two pin relative positions are fixed, in waiting lift angle spiral chute, drive nut and move upward.
When " ditches " that move to left and right sides helix infall when the pin 6 that floats were gone up, fixed point pin 5 was born whole load alone on helicoid, allowing the pin 6 that floats cross " ditch "; When fixed point pin 5 moved to " ditch " and goes up, the pin 6 that floats had passed through " ditch ", and bears whole load alone, allows fixed point pin 5 cross " ditch ", and so alternately carrying replaced " ditch ", made the nut motion continuously.
When two pins have all been crossed last helix intersection, upper end, enter when not having the change of " ditch " lift angle spiral chute, the lead angle of selling 6 loca places of floating is sold 5 loca place spiral fluted lead angles less than fixed point, angle of screw rod rotation this moment, the lift of the spiral groove face at place, unsteady pin 6 places is just sold the lift of the spiral groove face of locating at 5 places less than fixed point, so load just all acts on the fixed point pin 5, and the drive nut continues to rise.And the pin 6 that floats breaks away from following groove face and contacts with upper groove surface.And under the effect of upper groove surface reaction force, drive swing member and rotate counterclockwise, the unsteady pin 6 on the swing member just moves down, thus the lift that has compensated two pins is poor, makes two pins can be not stuck in spiral chute.This moment, nut was done uniformly retarded motion (being determined by the spiral chute design parameter) in becoming the lift angle section, and when arriving the summit, the rate of climb of nut drops to zero.Cross the spiral fluted peak in succession with latter two pin and enter left-handed groove, the pin 6 that floats continues to promote the swing member rotation, compensates the pitch difference of two pins.
When two pins all enter the left hand screw groove etc. after the lead angle section, block 2 on the rotor is crushed to death on upper limit position block 1, two pin alternately carryings again, replaced " ditch ", nut is at the uniform velocity descended, go round and begin again, just the continuous unidirectional rotary motion of screw rod 4 has been transformed into the linear reciprocating motion of nut 8.In the movement process, guide rod 9 guarantees that nut 8 can only move up and down, but can not rotate around screw rod 4.
Claims (1)
1 is in the spiral changement of rolling friction state, it is characterized in that, mainly by upper limit position block (1), block (2), lower position block (3), screw rod (4), fixed point pin (5), pin (6) floats, swing member (7), nut (8), guide rod (9) is formed, described fixed point pin (5) is arranged in nut (8), can be along himself rotational, described unsteady pin (6) is arranged in swing member (7), can be along himself rotational, described swing member (7) is arranged in nut (8), sliding bearing is arranged between the two, can relatively rotate, described block (2) is fixed on the swing member (7), described upper limit position block (1), lower position block (3) is fixed on the nut (8), and described nut (8) can move up and down along guide rod (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100409791A CN1300489C (en) | 2004-11-04 | 2004-11-04 | Screw reversing mechanism in a state of rolling friction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100409791A CN1300489C (en) | 2004-11-04 | 2004-11-04 | Screw reversing mechanism in a state of rolling friction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1603663A CN1603663A (en) | 2005-04-06 |
| CN1300489C true CN1300489C (en) | 2007-02-14 |
Family
ID=34664829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100409791A Expired - Fee Related CN1300489C (en) | 2004-11-04 | 2004-11-04 | Screw reversing mechanism in a state of rolling friction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1300489C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5096551B2 (en) * | 2010-12-20 | 2012-12-12 | Ｔｈｋ株式会社 | Screw motion mechanism and damping device using the same |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3779094A (en) * | 1972-06-12 | 1973-12-18 | Norco Inc | Reversing nut for a diamond thread screw |
| US4343200A (en) * | 1980-09-08 | 1982-08-10 | James Alworth | Reversing attachment for diamond thread screw |
| CN2106939U (en) * | 1991-08-05 | 1992-06-10 | 邓隽钧 | Reversal rolling screw pair |
| CN2305525Y (en) * | 1997-08-22 | 1999-01-27 | 崔长江 | Reciprocating and circular motion reversable switching equipment |
| CN2596108Y (en) * | 2002-12-23 | 2003-12-31 | 张金泉 | Double-sprial electric reciprocating device |
-
2004
- 2004-11-04 CN CNB2004100409791A patent/CN1300489C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3779094A (en) * | 1972-06-12 | 1973-12-18 | Norco Inc | Reversing nut for a diamond thread screw |
| US4343200A (en) * | 1980-09-08 | 1982-08-10 | James Alworth | Reversing attachment for diamond thread screw |
| CN2106939U (en) * | 1991-08-05 | 1992-06-10 | 邓隽钧 | Reversal rolling screw pair |
| CN2305525Y (en) * | 1997-08-22 | 1999-01-27 | 崔长江 | Reciprocating and circular motion reversable switching equipment |
| CN2596108Y (en) * | 2002-12-23 | 2003-12-31 | 张金泉 | Double-sprial electric reciprocating device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1603663A (en) | 2005-04-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20070214 Termination date: 20091204 |