CN104820446A - Curved surface constant-force mechanism - Google Patents
Curved surface constant-force mechanism Download PDFInfo
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- CN104820446A CN104820446A CN201510197530.4A CN201510197530A CN104820446A CN 104820446 A CN104820446 A CN 104820446A CN 201510197530 A CN201510197530 A CN 201510197530A CN 104820446 A CN104820446 A CN 104820446A
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- rolling bearing
- assembly
- curved surface
- constant force
- roller assembly
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Abstract
The invention provides a curved surface constant-force mechanism. The mechanism is composed of a base assembly, a pushing force assembly and a constant-force assembly; the base assembly is composed of a cover plate, an outer cylinder and a bottom plate, and all the parts are successively and fixedly connected; the pushing-force assembly is composed of a screw, an upper limit rod, a spring, a lower limit rod and a wedge block assembly, and all the parts are successively connected; the wedge block assembly is composed of a wedge block, a rolling bearing and a mandrel, and the rolling bearing is installed on the wedge block through the mandrel; the pushing-force assembly is installed in the base assembly; the constant-force assembly is composed of a roller assembly and a curved surface push rod, and the roller assembly contacts the curved surface push rod; the roller assembly is composed of a support rack, a rolling bearing and a mandrel, and the rolling bearing is installed on the wedge block through the mandrel; and the constant-force assembly is installed in the base assembly and contacts the pushing-force assembly. The curved surface constant-force mechanism has the advantages of the small size, the simple structure and high reliability, and is not limited by an installation position.
Description
Technical field
The present invention relates to a kind of constant force load maintainer, particularly relate to a kind of curved surface constant force mechanisms.
Background technology
Constant force mechanisms is used widely at numerous areas, as coil paper, material test, space equipment, thermal power generation etc., has material impact to the safety and reliability of equipment.And the method for the constant force that can obtain at present has: Mechatronics control, the methods such as gravitational equilibrium.Mechatronics control can the accurate control of realizable force by retroactive effect, but generally this structure is comparatively complicated, volume is comparatively large, reliability is not high.The gravity that gravitational equilibrium method is subject to by weight, as the input of constant force, can obtain very high precision, but this device requires higher to installation site, is difficult to meet practical application condition.
Summary of the invention
The object of the invention is to overcome existing constant force mechanisms above shortcomings, the curved surface constant force mechanisms that a kind of volume is little, structure is simple, reliability is high is provided.
The present invention by the following technical solutions.
Curved surface constant force mechanisms of the present invention is made up of base assembly, thrust assemblies and constant force assembly:
1) described base assembly is made up of cover plate, urceolus and base plate; Cover plate, urceolus and base plate are connected successively;
2) described thrust assemblies is made up of screw, upper limit bar, spring, lower limit bar and wedge assemblies; Screw, upper limit bar, spring, lower limit bar are connected successively with wedge assemblies; Upper limit bar and cover plate are connected by screw, and wedge assemblies contacts with the chute in urceolus; Described wedge assemblies is made up of voussoir, rolling bearing and axle; Rolling bearing is fixed on voussoir by axle, and wedge assemblies is contacted with the chute in urceolus by rolling bearing;
3) described constant force assembly is made up of roller assembly and curved surface push rod; The curved face contact of roller assembly and curved surface push rod; Roller assembly is arranged on base plate, the contact of incline plane of roller assembly and voussoir, and curved surface push rod is through pressing plate center; Described roller assembly is made up of bracing frame, rolling bearing and axle; Rolling bearing is fixed on bracing frame by axle, and roller assembly is by rolling bearing and curved surface push rod, voussoir and contacts baseplate.
In such scheme, installation of staggering between the rolling bearing on wedge assemblies in different axle, rolling bearing is arranged symmetrically with, and make one-piece construction compacter, stressing conditions is better.
In such scheme, installation of staggering between the rolling bearing on roller assembly in different axle, rolling bearing is arranged symmetrically with, and make one-piece construction compacter, stressing conditions is better.
In such scheme, thrust assemblies is identical with constant force component count, is at least two groups, and is uniformly distributed round curved surface push rod center line.
It is power decomposition principle that constant force of the present invention realizes principle.Specific implementation: the power that spring produces is applied to the roller on roller assembly, the curved face contact of roller and curved surface push rod, roller with roller assembly in the process away from the movement of base plate center, spring is compressed, the power of spring action on roller increases on the one hand, and the slope of roller and curved face contact point increases on the other hand, and final effect is that the acting force between roller and inclined-plane is being remained unchanged perpendicular to the component on roller movement direction, and by this masterpiece for exporting, thus realize constant force.
The invention has the beneficial effects as follows: 1. the present invention adopts pure physical construction, and reliability is high; 2. adopt power decomposition principle, Principles and methods is simple, and organization volume is reduced; 3. not produce constant force by gravity, not by the restriction of installation site.
Accompanying drawing explanation
Fig. 1 is the main cut-open view of curved surface constant force mechanisms.
Fig. 2 is the structure diagram of constant force mechanisms.
Fig. 3 is the one-piece construction figure of wedge assemblies.
Fig. 4 is the one-piece construction figure of roller assembly.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
As shown in Figure 1, the invention provides a kind of version of embodiment, in the present embodiment, constant force mechanisms is important comprises base assembly, thrust assemblies and constant force assembly;
Described base assembly is made up of cover plate (1), urceolus (2) and base plate (3); Cover plate (1), urceolus (2) and base plate (3) are connected successively;
Described thrust assemblies is made up of screw (4), upper limit bar (5), spring (6), lower limit bar (7) and wedge assemblies; Screw (4), upper limit bar (5), spring (6), lower limit bar (7) are connected successively with wedge assemblies; Upper limit bar (5) is connected by screw (4) with cover plate (1), and wedge assemblies contacts with the chute in urceolus (2);
Described wedge assemblies is made up of voussoir (8), rolling bearing (9) and axle (10); Rolling bearing (9) is fixed on voussoir (8) by axle (10), and wedge assemblies is contacted with the chute in urceolus (2) by rolling bearing (9).Stagger between rolling bearing (9) on wedge assemblies in different axle (10) installation, rolling bearing (9) is arranged symmetrically with.
Described constant force assembly is made up of roller assembly and curved surface push rod (11); The curved face contact of roller assembly and curved surface push rod (11); Roller assembly is arranged on base plate (3), and roller assembly contacts with wedge assemblies, and curved surface push rod (11) is through cover plate (1) center.
Described roller assembly is made up of bracing frame (12), rolling bearing (13) and axle (14); Rolling bearing is fixed on bracing frame by axle, and roller assembly is by rolling bearing and curved surface push rod, voussoir and contacts baseplate.Stagger between rolling bearing (13) on roller assembly in different axle (14) installation, rolling bearing (13) is arranged symmetrically with.
Whole device is symmetric.During original state, two roller assembly contacts, curved surface push rod (11) contacts with two roller assemblies simultaneously.Spring (6) has certain precompressed, and precompressed length is equal with bearing (13) radius, in order to make the precompressed length of spring comparatively accurate, is finely tuned by screw (4).After precompressed completes, by curved surface push rod (11) toward pressing down, make it contact base plate (3), and by curved surface push rod (11) upper end be applied component contact.When the slight pressure acting on curved surface push rod (11) upper end reduces, curved surface push rod (11) will up move, until be applied to the constant force that the power be applied on parts reaches setting.
Be constant force mechanisms structure diagram as shown in Figure 2 (a) shows, be made up of a circle and a curve, circle can only do tangential movement along x-axis, and curve can only move up and down along y-axis.When circle is in position A, the stressing conditions of curve as shown in figure (b), and is known according to the relation of acting force and reacting force, and suffered making a concerted effort is ∑ F, and the component gone up in the horizontal direction is F, and the component vertically gone up is F
n; When circular motion is to position A ', what curve was subject to makes a concerted effort for ∑ F ', because the size of horizontal direction component F meets certain funtcional relationship with the angle of making a concerted effort, makes the component vertically gone up still be F
n, and by this masterpiece for exporting, reach constant force effect.
Be illustrated in figure 3 the one-piece construction figure of wedge assemblies, be arranged on installation of staggering between the rolling bearing (9) in different axle (10), one-piece construction can be made compacter, and rolling bearing (9) is symmetrical about mid-plane, makes one-piece construction stressing conditions better.
Be illustrated in figure 4 the one-piece construction figure of roller assembly, be arranged on installation of staggering between the rolling bearing (13) in different axle (14), one-piece construction can be made compacter, and rolling bearing (13) is symmetrical about mid-plane, makes one-piece construction stressing conditions better.
Claims (4)
1. a curved surface constant force mechanisms, is characterized in that: it comprises base assembly, thrust assemblies and constant force assembly;
Described base assembly is made up of cover plate (1), urceolus (2) and base plate (3); Cover plate (1), urceolus (2) and base plate (3) are connected successively;
Described thrust assemblies is made up of screw (4), upper limit bar (5), spring (6), lower limit bar (7) and wedge assemblies; Screw (4), upper limit bar (5), spring (6), lower limit bar (7) are connected successively with wedge assemblies; Upper limit bar (5) is connected by screw (4) with cover plate (1), and wedge assemblies contacts with the chute in urceolus (2);
Described wedge assemblies is made up of voussoir (8), rolling bearing (9) and axle (10); Rolling bearing (9) is fixed on voussoir (8) by axle (10), and wedge assemblies is contacted with the chute in urceolus (2) by rolling bearing (9);
Described constant force assembly is made up of roller assembly and curved surface push rod (11); The curved face contact of roller assembly and curved surface push rod (11); Roller assembly is arranged on base plate (3), and roller assembly contacts with wedge assemblies, and curved surface push rod (11) is through cover plate (1) center;
Described roller assembly is made up of bracing frame (12), rolling bearing (13) and axle (14); Rolling bearing (13) is fixed on bracing frame (12) by axle (14), and roller assembly is contacted with base plate (3) with curved surface push rod (8), voussoir (9) by rolling bearing (13).
2. curved surface constant force mechanisms according to claim 1, is characterized in that: installation of staggering between the rolling bearing (9) on wedge assemblies in different axle (10), rolling bearing (9) is arranged symmetrically with.
3. curved surface constant force mechanisms according to claim 1, is characterized in that: installation of staggering between the rolling bearing (13) on roller assembly in different axle (14), rolling bearing (13) is arranged symmetrically with.
4. curved surface constant force mechanisms according to claim 1, is characterized in that: thrust assemblies is identical with constant force component count, is at least two groups, and is uniformly distributed round curved surface push rod (11) center line.
Priority Applications (1)
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CN201510197530.4A CN104820446B (en) | 2015-04-24 | 2015-04-24 | A kind of curved surface constant force mechanisms |
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CN201510197530.4A CN104820446B (en) | 2015-04-24 | 2015-04-24 | A kind of curved surface constant force mechanisms |
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CN104820446A true CN104820446A (en) | 2015-08-05 |
CN104820446B CN104820446B (en) | 2017-06-16 |
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CN201510197530.4A Expired - Fee Related CN104820446B (en) | 2015-04-24 | 2015-04-24 | A kind of curved surface constant force mechanisms |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105487563A (en) * | 2016-01-07 | 2016-04-13 | 四川大学 | Adjustable constant force mechanism |
CN113154005A (en) * | 2021-04-23 | 2021-07-23 | 成都理工大学 | Adjustable constant force output mechanism of curved surface cam |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6128968A (en) * | 1998-03-13 | 2000-10-10 | Mitutuyo Corporation | Constant-pressure mechanism and constant-torque mechanism |
US20030173076A1 (en) * | 2002-03-13 | 2003-09-18 | Sheiretov Todor K. | Constant force actuator |
CN103438141A (en) * | 2013-09-03 | 2013-12-11 | 北京工业大学 | Adjustable constant force device |
CN204650299U (en) * | 2015-04-24 | 2015-09-16 | 四川大学 | A kind of curved surface constant force mechanisms |
-
2015
- 2015-04-24 CN CN201510197530.4A patent/CN104820446B/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6128968A (en) * | 1998-03-13 | 2000-10-10 | Mitutuyo Corporation | Constant-pressure mechanism and constant-torque mechanism |
US20030173076A1 (en) * | 2002-03-13 | 2003-09-18 | Sheiretov Todor K. | Constant force actuator |
CN103438141A (en) * | 2013-09-03 | 2013-12-11 | 北京工业大学 | Adjustable constant force device |
CN204650299U (en) * | 2015-04-24 | 2015-09-16 | 四川大学 | A kind of curved surface constant force mechanisms |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105487563A (en) * | 2016-01-07 | 2016-04-13 | 四川大学 | Adjustable constant force mechanism |
CN105487563B (en) * | 2016-01-07 | 2018-04-20 | 四川大学 | A kind of adjustable constant force mechanisms |
CN113154005A (en) * | 2021-04-23 | 2021-07-23 | 成都理工大学 | Adjustable constant force output mechanism of curved surface cam |
CN113154005B (en) * | 2021-04-23 | 2022-08-02 | 成都理工大学 | Adjustable constant force output mechanism of curved surface cam |
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Granted publication date: 20170616 |