CN201428779Y - Quick automatic tensioning mechanism for dynamic triple connecting rod - Google Patents
Quick automatic tensioning mechanism for dynamic triple connecting rod Download PDFInfo
- Publication number
- CN201428779Y CN201428779Y CN2009201096415U CN200920109641U CN201428779Y CN 201428779 Y CN201428779 Y CN 201428779Y CN 2009201096415 U CN2009201096415 U CN 2009201096415U CN 200920109641 U CN200920109641 U CN 200920109641U CN 201428779 Y CN201428779 Y CN 201428779Y
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- hinge
- connecting rod
- tensioning
- tensioning mechanism
- extension spring
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Abstract
The utility model discloses a quick automatic tensioning mechanism for a dynamic triple connecting rod. The tensioning mechanism comprises a machine frame, a hinge I and a hinge II are arranged on themachine frame, and the hinge I and the hinge II form a connecting rod II; the tensioning mechanism further comprises a connecting rod III, the connecting rod III is a cylindrical spiral extension spring, and the lower end of the cylindrical spiral extension spring is connected with the hinge I; the lower end of a connecting rod I is connected with the hinge II, the middle part thereof is connected with the upper end of the cylindrical spiral extension spring, a pinch roller is hinged with the middle part of the connecting rod I, and the hinge I, the hinge II as well as the middle part of theconnecting rod I and the tie point of the cylindrical spiral extension spring form a triangular structure. The tensioning mechanism has the advantages of quick mechanism, automatic tensioning, no periodical tensioning, improved capability of transmitted load, raised transmission efficiency, prolonged service life of bearings and adhesive tapes, simple mechanism, low manufacturing cost, and convenient operation.
Description
Technical field
The utility model relates to a kind of tensioning mechanism, the fast automatic tensioning mechanism of particularly a kind of dynamic three link rods
Background technique
In the band transmission, the pretightening force of band all has a significant impact its transmission capacity, life-span and axial pressure.The pretightening force deficiency, the ability of transmitted load reduces, and efficient is low, and driving pulley is sharply generated heat, the adhesive tape wearing and tearing; Pretightening force is excessive, and the life-span of band is reduced, and the load on axle and the bearing increases, bearing heating, wearing and tearing.Therefore suitable pretightening force is the key factor that guarantees band transmission proper functioning.
The tensioning mode that we use always generally has two kinds: the first, and the adjusting axle spacing; The second, use Idle wheel; Ask for an interview accompanying drawing 1,2, among the figure, 10 is tensioning screw, and 11 are the tensioning moving track, and 12 is Idle wheel.We know from figure:
First kind of tensioning mode: make the end of screw rod be close to support by the rotation tensioning screw support integral body that belt wheel is housed is moved to the direction away from another belt wheel.1. tensioning moving tracks are absolutely necessary in this structure; And the accuracy of manufacturing of tensioning track and the parallelism of installation require all very high; 2. in the tensioning process adjusting of screw rod be a kind of slowly and the work that repeats, and the big or small bad grasp of tension force; 3. because belt can increase to some extent than original state in the running, so the tensioning regularly of this structure.
Second kind of tensioning mode: the Idle wheel that has nut is moved up and down to play the effect of tightening belt by the rotation tensioning screw; With first kind of tensioning mode duplicate in the tensioning process adjusting of screw rod be a kind of slowly and the work that repeats, and the big or small bad grasp of tension force, this structure is tensioning regularly also.
These two kinds of tensioning modes lax (from) or the rotation tensioning screw that must not stop during tensioning (closing) just can reach the purpose of lax or tensioning, these two kinds of tensioning mode complex structures, manufacturing cost height.
Summary of the invention
The purpose of this utility model provides the fast automatic tensioning mechanism of a kind of dynamic three link rods, and the tensioning fast and automatically of this mechanism need not regular tensioning, improve the ability of transmitted load, improve transmission efficiency, prolong the working life of bearing, adhesive tape, mechanism is simple, low cost of manufacture, and easy to operate.
For reaching above-mentioned goal of the invention, the utility model by the following technical solutions:
The fast automatic tensioning mechanism of this dynamic three link rods comprises: frame, frame is provided with hinge I, hinge II, and hinge I and hinge II form connecting rod II, and tensioning mechanism also comprises: connecting rod III, it is a cylindroid helicalcoil extension spring, the following termination hinge I of cylindroid helicalcoil extension spring; The lower end that on hinge II, connects connecting rod I, its middle part is connected with the upper end of cylindroid helicalcoil extension spring, links a pinch roller at the middle part of connecting rod I, and hinge I, hinge II and connecting rod I middle part form triangular structure with the tie point of cylindroid helicalcoil extension spring.
Described triangular structure is AB and BC's and less than the length under the spring test mass (limit load); AB＜BC＜AC; The angle of the AB and the belt pulley line of centres is α, and 0 °＜α＜45 °.
The pinch roller of the middle part of described connecting rod I hinge joint, it is positioned at the C point is on the normal of BC of intersection point, or overlaps with the C point or on the elongation line of BC, so the resulting pressure 〉=F of pinch roller.
The material of described spring is an alloy spring wire.
Described tensioning mechanism also comprises the tensioning of other travelling belt except that the tensioning of power transmission belt, such as the fast automatic tensioning mechanism of these dynamic three link rods is installed and can be carried out tensioning to travelling belt in the belt bilateral symmetry of broadband transportation, the Idle wheel of this moment becomes hitch roll, the two ends of hitch roll are hinged with the connecting rod I of the fast automatic tensioning mechanism of dynamic three link rods of travelling belt both sides respectively, and the fast automatic tensioning mechanism of dynamic three link rods of both sides is connected as a single entity; The perpendicularity of suitably regulating hitch roll and transporting direction can solve the sideslip problem of travelling belt.
Advantage of the present utility model is:
1. quick: belt from be combined within 1 second and can finish.Just can realize the quick tensioning of belt as long as connecting rod I swung;
2. auto-tensioning: since reasonable use the elastic force of spring, tension force can be regulated automatically, need not regular tensioning;
3. respond to the pretightening force of belt automatically, improve the ability of transmitted load, the working life of improving transmission efficiency, prolongation bearing, adhesive tape;
4. mechanism is simple;
5. low cost of manufacture.
Description of drawings
Fig. 1: a kind of structural representation of tensioning mode commonly used
Fig. 2: the structural representation of another kind of tensioning mode commonly used
Fig. 3: the structural representation of tensioning mechanism of the present invention
Fig. 4 a: the present invention is applied in the force analysis figure () in the v belt transmission
Fig. 4 b: the present invention is applied in force analysis figure (two) in the v belt transmission
Embodiment
Among Fig. 1, Fig. 2, Fig. 3, A is that hinge I, B are hinge II; Hinge I and hinge II are connected to the diverse location of frame 1, and hinge I, hinge II form connecting rod II, and its size and fixed-site are constant; 2 is connecting rod I, 3 is connecting rod III, termination hinge II under the connecting rod I, connecting rod I middle part is connected with cylindroid helicalcoil extension spring as connecting rod III, its tie point is C, that connecting rod I, the BC ' that BC constitutes tensioning (closing) state constitutes is lax (from) the connecting rod I of state, the length dimension of connecting rod I is constant, and the position can swing by movable hinge I; AC (C
1, C
2, C
3... C
n) the connecting rod III, the AC ' that constitute tensioning (closing) state constitute lax (from) the connecting rod III of state; Connecting rod III is made of spring.
The position of C point (another end points of connecting rod III just): a). can be changed to C ' by C along with the swing of connecting rod I; B). the C point can not stop along with the tension force of belt in the tensioning state of belt is changed to (C
1, C
2, C
3... C
n); So tension force required when belt tension is put to death in the length of connecting rod III and position, 12 is Idle wheel, and 5 is belt.
In the v belt transmission, should be used as a simple force analysis to the fast automatic tensioning mechanism of dynamic three link rods below, describe the characteristic that regular tensioning was regulated, be need not to tension force automatically with this.
Among Fig. 4 a, Fig. 4 b, triangle ABC is the tensioning state (note: Idle wheel necessarily is placed in the bel-drivenn slack list) in the power transmission, and we can see that the Idle wheel the tensioning mechanism is subjected to F all the time under the effect of elastic force and support force from free-body diagram
1, F
2The counter-force that produced when F and belt tension of making a concerted effort, triangle ABC is in steady state when this two equilibrium of forces, if this two force unbalance then have two kinds of phenomenons and take place:
When counter-force during greater than F, the C point is rotated counterclockwise up to this counter-force and F balance, this moment ABC be in steady state in this structure Design, must note the angle that is rotated counterclockwise be less than ∠ A and ∠ C and, (this moment counter-force be 0) C point can not be above the elongation line of AB when just belt was in relaxed state.
When counter-force during less than F (belt can increase to some extent after using the regular hour or belt does not have tensioning to put in place) C point turns clockwise up to this counter-force and F balance, triangle ABC is in another steady state at this moment.
When the afterbody of moving connecting rod I with hand counterclockwise (that is: the elongation line of BC), as long as C point arrive continue again on the elongation line of AB the angle that firmly just is rotated counterclockwise greater than ∠ A and ∠ C with, this tensioning mechanism is in the relaxed state See Figure automatically so: triangle ABC ' is the relaxed state in the power transmission, and what this moment, mechanism was suffered is combined into 0 (spring does not have deformation or utilizes frame to apply certain counter-force).This moment, triangle ABC ' was in steady state.
Claims (4)
1, the fast automatic tensioning mechanism of a kind of dynamic three link rods, it is characterized in that: it comprises: frame, frame is provided with hinge I, hinge II, hinge I and hinge II form connecting rod II, tensioning mechanism also comprises: connecting rod III, it is a cylindroid helicalcoil extension spring, the following termination hinge I of cylindroid helicalcoil extension spring; The lower end that on hinge II, connects connecting rod I, its middle part is connected with the upper end of cylindroid helicalcoil extension spring, links a pinch roller at the middle part of connecting rod I, and hinge I, hinge II and connecting rod I middle part form triangular structure with the tie point of cylindroid helicalcoil extension spring.
2, the fast automatic tensioning mechanism of a kind of dynamic three link rods according to claim 1 is characterized in that: described triangular structure is AB and BC's and less than the length under the spring test mass; AB＜BC＜AC; The angle of the AB and the belt pulley line of centres is α, and 0 °＜α＜45 °.
3, the fast automatic tensioning mechanism of a kind of dynamic three link rods according to claim 1 and 2 is characterized in that: the pinch roller of the middle part of described connecting rod I hinge joint, it is positioned at the C point is on the normal of BC of intersection point, or overlaps with the C point or on the elongation line of BC.
4, the fast automatic tensioning mechanism of a kind of dynamic three link rods according to claim 1, it is characterized in that: the material of described spring is an alloy spring wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201096415U CN201428779Y (en) | 2009-07-01 | 2009-07-01 | Quick automatic tensioning mechanism for dynamic triple connecting rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201096415U CN201428779Y (en) | 2009-07-01 | 2009-07-01 | Quick automatic tensioning mechanism for dynamic triple connecting rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201428779Y true CN201428779Y (en) | 2010-03-24 |
Family
ID=42032516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201096415U Expired - Lifetime CN201428779Y (en) | 2009-07-01 | 2009-07-01 | Quick automatic tensioning mechanism for dynamic triple connecting rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201428779Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936371B (en) * | 2009-07-01 | 2013-08-07 | 绿友机械集团股份有限公司 | Quick automatic tensioning mechanism of dynamic triple connecting rod |
| CN103896107A (en) * | 2012-12-31 | 2014-07-02 | 周敏亮 | Swing cable guide |
| CN112081888A (en) * | 2020-09-18 | 2020-12-15 | 中冶东方工程技术有限公司 | Conveniently-installed guide tensioning device and belt tensioning system |
-
2009
- 2009-07-01 CN CN2009201096415U patent/CN201428779Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936371B (en) * | 2009-07-01 | 2013-08-07 | 绿友机械集团股份有限公司 | Quick automatic tensioning mechanism of dynamic triple connecting rod |
| CN103896107A (en) * | 2012-12-31 | 2014-07-02 | 周敏亮 | Swing cable guide |
| CN112081888A (en) * | 2020-09-18 | 2020-12-15 | 中冶东方工程技术有限公司 | Conveniently-installed guide tensioning device and belt tensioning system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100324 Effective date of abandoning: 20090701 |
|
| RGAV | Abandon patent right to avoid regrant |