CN105221695B - Low friction space perseverance torsion spring cam mechanism - Google Patents
Low friction space perseverance torsion spring cam mechanism Download PDFInfo
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- CN105221695B CN105221695B CN201510696936.7A CN201510696936A CN105221695B CN 105221695 B CN105221695 B CN 105221695B CN 201510696936 A CN201510696936 A CN 201510696936A CN 105221695 B CN105221695 B CN 105221695B
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- Prior art keywords
- cam
- spring
- swing rod
- reel
- power input
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
- F16H37/12—Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these types
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
- Springs (AREA)
- Friction Gearing (AREA)
Abstract
Low friction space perseverance torsion spring cam mechanism, belongs to constant force load maintainer technical field, and the present invention has the problem of radial dimension is big to solve existing plane low friction spring cam structure.The present invention includes cam pack, spring and swing rod, cam pack includes cam, roller and reel, one end connection power input shaft of swing rod, reel connection clutch end, connected between swing rod and cam pack by spring, realize the moment of torsion transmission between swing rod and cam；Power input shaft is inside reel, and reel and power input shaft are concentric, the profile of cam is fixedly connected on the madial wall of reel, and roller is rolled in the slot rolling of cam, one end of spring is fixedly connected on roller, and the other end of spring is fixedly connected on the other end of swing rod.The present invention is used for passive type constant force mechanisms.
Description
Technical field
The invention belongs to constant force load maintainer technical field.
Background technology
Constant force load maintainer is widely used in the fields such as coil paper, thermal power generation, the testing of materials, space equipment, and it can be straight
Connect the safety and reliability for having influence on equipment.Especially in space industry, by constant force mechanisms provide the compensation of micro- low gravitation come
Verify spacecraft performance, be through frequently with ground validation mode.Traditional gravity compensation presentation mode has breeding balance, gas
Floating, water is floating, suspension method etc., and wherein suspension method gravity simulation has Active Compensation and passive compensation two ways.
In the prior art, scroll spring or torsion spring, such constant force device are used the passive type constant force output device used more
Limitation be embodied in following two aspects：One is that the torque of output is gradual change torque, and moment values are with the change of rotational angle
Linear change, to ensure that torque exports the torque nargin of end, makes final output gross energy much larger than requiring, produces extra punching
Hit；Two be that moment values are relatively low, it is impossible to realizes the output of high-torque, it is difficult to adapt to the demand of multiple-task.
There are some shortcomings in the design of existing plane low friction spring cam constant force mechanisms, its radial dimension is too big, it is impossible to
Meet and require, in many occasions, the volume that we want this mechanism is small as far as possible.
The content of the invention
The invention aims to solve existing plane low friction spring cam structure to have the problem of radial dimension is big, carry
A kind of permanent torsion spring cam mechanism in low friction space is supplied.
The permanent torsion spring cam mechanism in low friction space of the present invention, it includes cam pack, spring and swing rod, cam
Component includes cam, roller and reel, one end connection power input shaft of swing rod, reel connection clutch end, swing rod and convex
Connected between wheel assembly by spring, realize the moment of torsion transmission between swing rod and cam；Power input shaft is inside reel, and volume
Cylinder and power input shaft are concentric, and the profile of cam is fixedly connected on the madial wall of reel, and roller is rolled in the slot rolling of cam
Dynamic, one end of spring is fixedly connected on roller, and the other end of spring is fixedly connected on the other end of swing rod.
Advantages of the present invention：The present invention proposes a kind of wide applicable torque scope, output torque value stabilization height, radial ruler
The very little permanent torsion spring cam mechanism in small low friction space.The permanent torsion spring cam mechanism in low friction space of the present invention is used
In passive type constant force mechanisms, the load changed for high frequency provides constant force output.
Brief description of the drawings
Fig. 1 is the structural representation of the permanent torsion spring cam mechanism in low friction space of the present invention；
Fig. 2 has been to determine the space cam profile that the satisfaction obtained after spring, swing rod and constant-torque is required.
Embodiment
Embodiment one：Illustrate present embodiment with reference to Fig. 1, low friction space perseverance is turned round described in present embodiment
Square spring cam mechanism, it includes cam pack, spring 3 and swing rod 4, and cam pack includes cam 1, roller 2 and reel 5, pendulum
One end connection power input shaft of bar 4, the connection clutch end of reel 5 is connected between swing rod 4 and cam pack by spring 3,
Realize the moment of torsion transmission between swing rod 4 and cam 1；Power input shaft is inside reel 5, and reel 5 and power input shaft are coaxial
The heart, the profile of cam 1 is fixedly connected on the madial wall of reel 5, and roller 2 is rolled in the slot rolling of cam 1, one end of spring 3
It is fixedly connected on roller 2, the other end of spring 3 is fixedly connected on the other end of swing rod 4.
In present embodiment, the profile of space cam 1 is fixedly connected on the reel 5 of cylindrical type, and constant moment of force is passed to
Reel, by reel folding and unfolding hoist cable, realizes the permanent pulling force on hoist cable.
In present embodiment, space cam is as the output end of permanent moment of torsion, and its outer end can be connected with cylinder reel, export
Constant force.Connected between the profile of swing rod 4 and space cam 1 by spring 3, realize the moment of torsion transmission between two parts, simultaneously
Suppress impulsive disturbance.
Embodiment two：Illustrate present embodiment with reference to Fig. 1, present embodiment is made into one to embodiment one
Step explanation, spring 3 uses cylindroid helical-coil extension spring.
Embodiment three：Illustrate present embodiment with reference to Fig. 1, present embodiment is made into one to embodiment one
Step explanation, the connection power input shaft of swing rod 4, the power input shaft is motor shaft or reducer shaft.
In present embodiment, the moment of torsion that motor is exported is input in cam by swing rod 4 as torque input end.
Embodiment four：Illustrate present embodiment with reference to Fig. 1, present embodiment is made into one to embodiment one
There are N groups step explanation, the axial direction of spring 3 and cam pack along power input shaft, and wherein N is positive integer.
Embodiment five：Illustrate present embodiment with reference to Fig. 1, present embodiment is made into one to embodiment one
Step explanation, meets the profile Special composition curved surface of spring 3 and all cams 1 of the constant-torque condition of swing rod 4.
In present embodiment, any one curve all meets constant force requirement on the space curved surface, is here easy to use, choosing
The reel 5 of cylinder is taken to go to cut this space curved surface, intersection curve is the profile of cam 1.
The present invention operation principle be：When stable transmission, swing rod 4 is relative to cam pack without rotation, the elastic force of spring 3
Keep constant, there is provided stable constant moment of force while the acting force arm holding of elastic force is constant；
When reel 5 is caused angle to change by load displacement, cam pack rotates relative to swing rod 4, and spring 3 is adaptive
To equilbrium position, the elastic force of spring 3 changes, while the acting force arm of elastic force changes, but can keep output
Torque remains set constant.
In the present invention, the theory of constant moment of force output is realized using the variable arm of force, can realize in whole transmission process and continue
Constant moment is exported, and, it is considered to the layout of plane can cause the size of radial direction than larger, therefore, spring is expanded into space
In, also, can be seen that and have found under same parameter according to Fig. 2, there are no array space profiles can meet requirement.The present invention
The torque that the permanent torsion spring cam mechanism in the low friction space of proposition can be provided has stability height, the interference that is hit is small, export
The characteristics of scope is wide, while having radial dimension small, flexible design is simple in construction, the characteristics of highly versatile.
Claims (5)
1. low friction space perseverance torsion spring cam mechanism, it is characterised in that it includes cam pack, spring (3) and swing rod
(4), cam pack includes cam (1), roller (2) and reel (5), one end connection power input shaft of swing rod (4), reel (5)
Clutch end is connected, swing rod (4) is connected by spring (3) between cam pack, realized between swing rod (4) and cam (1)
Moment of torsion transmission；Power input shaft is internal in reel (5), and reel (5) and power input shaft are concentric, the profile of cam (1)
On the madial wall for being fixedly connected on reel (5), roller (2) is rolled in the slot rolling of cam (1), and one end of spring (3), which is fixed, to be connected
It is connected on roller (2), the other end of spring (3) is fixedly connected on the other end of swing rod (4).
2. the permanent torsion spring cam mechanism in low friction space according to claim 1, it is characterised in that spring (3) is using circle
Post spiral stretching spring.
3. the permanent torsion spring cam mechanism in low friction space according to claim 1, it is characterised in that swing rod (4) connection is dynamic
Power input shaft, the power input shaft is motor shaft or reducer shaft.
4. the permanent torsion spring cam mechanism in low friction space according to claim 1, it is characterised in that spring (3) and cam
There are N groups axial direction of the component along power input shaft, and wherein N is positive integer.
5. the permanent torsion spring cam mechanism in low friction space according to claim 1, it is characterised in that meet spring (3) and
The profile Special composition curved surface of all cams (1) of swing rod (4) constant-torque condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510696936.7A CN105221695B (en) | 2015-10-23 | 2015-10-23 | Low friction space perseverance torsion spring cam mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510696936.7A CN105221695B (en) | 2015-10-23 | 2015-10-23 | Low friction space perseverance torsion spring cam mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105221695A CN105221695A (en) | 2016-01-06 |
| CN105221695B true CN105221695B (en) | 2017-11-03 |
Family
ID=54990840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510696936.7A Active CN105221695B (en) | 2015-10-23 | 2015-10-23 | Low friction space perseverance torsion spring cam mechanism |
Country Status (1)
| Country | Link |
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| CN (1) | CN105221695B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2903010A1 (en) * | 1979-01-25 | 1980-07-31 | Mannesmann Ag | Constant force suspension for pipeline - uses cam and coil spring arrangement to provide constant torque on shaft |
| EP0306786A1 (en) * | 1987-09-08 | 1989-03-15 | IWK Regler und Kompensatoren GmbH | Permanent hanger |
| EP0942258A2 (en) * | 1998-03-13 | 1999-09-15 | Mitutoyo Corporation | Constant-pressure mechanism and constant-torque mechanism for a measuring gauge |
| CN101000282A (en) * | 2006-12-15 | 2007-07-18 | 哈尔滨工业大学 | Multifunction test device for wheel motion performance of planetary detection robot |
| TW201219679A (en) * | 2010-11-08 | 2012-05-16 | Univ Nat Sun Yat Sen | Transmission mechanism having coaxial cam assemblies |
| CN102749191A (en) * | 2012-07-19 | 2012-10-24 | 哈尔滨工业大学 | Comprehensive test stand for simulating lunar soil exploration coring thermal property parameters |
| CN202642891U (en) * | 2012-05-22 | 2013-01-02 | 北京印刷学院 | Speed change paper feed mechanism |
| CN103496603A (en) * | 2013-09-29 | 2014-01-08 | 天津航天机电设备研究所 | Constant-force mechanism |
-
2015
- 2015-10-23 CN CN201510696936.7A patent/CN105221695B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2903010A1 (en) * | 1979-01-25 | 1980-07-31 | Mannesmann Ag | Constant force suspension for pipeline - uses cam and coil spring arrangement to provide constant torque on shaft |
| EP0306786A1 (en) * | 1987-09-08 | 1989-03-15 | IWK Regler und Kompensatoren GmbH | Permanent hanger |
| EP0942258A2 (en) * | 1998-03-13 | 1999-09-15 | Mitutoyo Corporation | Constant-pressure mechanism and constant-torque mechanism for a measuring gauge |
| CN1231437A (en) * | 1998-03-13 | 1999-10-13 | 株式会社三丰 | Constant pressure mechanism and constant torsion mechanism |
| CN101000282A (en) * | 2006-12-15 | 2007-07-18 | 哈尔滨工业大学 | Multifunction test device for wheel motion performance of planetary detection robot |
| TW201219679A (en) * | 2010-11-08 | 2012-05-16 | Univ Nat Sun Yat Sen | Transmission mechanism having coaxial cam assemblies |
| CN202642891U (en) * | 2012-05-22 | 2013-01-02 | 北京印刷学院 | Speed change paper feed mechanism |
| CN102749191A (en) * | 2012-07-19 | 2012-10-24 | 哈尔滨工业大学 | Comprehensive test stand for simulating lunar soil exploration coring thermal property parameters |
| CN103496603A (en) * | 2013-09-29 | 2014-01-08 | 天津航天机电设备研究所 | Constant-force mechanism |
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| Publication number | Publication date |
|---|---|
| CN105221695A (en) | 2016-01-06 |
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