CN205298435U - Chain tensioning ware based on cam - Google Patents
Chain tensioning ware based on cam Download PDFInfo
- Publication number
- CN205298435U CN205298435U CN201521107281.7U CN201521107281U CN205298435U CN 205298435 U CN205298435 U CN 205298435U CN 201521107281 U CN201521107281 U CN 201521107281U CN 205298435 U CN205298435 U CN 205298435U
- Authority
- CN
- China
- Prior art keywords
- cam
- chain
- extension arm
- magnet
- chain tensioning
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a chain tensioning ware based on cam, include: chain tensioning ware based on cam, its characterized in that includes: the fixed axle, the tensioning cam, its cover is established on the fixed axle to can wind its swing, the support arm, it includes the common port, connect an extension arm and the 2nd extension arm that common port symmetry set up jointly, an extension arm with the 2nd extension arm fixes at the fixed axle both ends, shock attenuation strutting arrangement, its one end supports at the support arm common port, and the other end supports at tensioning cam distal end for the resilient mounting of tensioning cam.
Description
Technical field
This utility model relates to a kind of chain tensioning device, particularly relates to a kind of chain tensioning device based on cam.
Background technology
Stretcher is holding means conventional on chain or belt drive system. Stretcher acts on driving chain or driving belt, driving chain or driving belt plays tensioning and guide effect, and makes it be in best tensioning state all the time. Chain or belt because the stress of self and abrasion, can deform and elongate the reduction causing chain or Belt Transmission Efficiency in life-time service. In order to be able to allow chain or belt keep suitable rate of tension, namely do not jump tooth be not also damaged because of tension because crossing pine, it is desirable to have a set of suitable tensioner, make them keep suitable rate of tension. Therefore the quality of stretcher directly affects quality and the transmission efficiency of chain or belt power drive system.
Architectural characteristic due to chain self so that it is want many at transmission process relative to the number of belt, amplitude of beating is big, and therefore generally drive system is higher to the requirement of chain tensioning device device. Although the structure of chain tensioning device is varied on market, but some chain tensioning devices are while ensureing tensioning and guide effect, chain number can not be efficiently reduced in chain drive process and weaken chain and beat amplitude, this transmission efficiency that will certainly affect chain and the service life of self. The chain tensioning device self-adjustable spring structure of many employings conventional at present, its meeting is along with the preload of the timely automated adjustment chain of energy of beating and wear and tear of chain self, but the frequency that in the chain drive process that can not effectively decay, chain is beated and amplitude.
Utility model content
A purpose of the present utility model is to devise a kind of chain tensioning device based on cam, this device is ensureing in chain drive process while tensioning and guide effect, moreover it is possible to remain the effect of best tensile force, decay drive system jumping frequency rate and amplitude.
The technical scheme that this utility model provides is:
Based on a kind of chain tensioning device of cam, including:
Fixing axle;
Tension cam, on its sheathed fixing axle, and can swing around it;
Support arm, it includes common port; Common connection symmetrically arranged first extension arm of described common port and the second extension arm, described first extension arm and described second extension arm are fixed on described fixing axle two ends;
Shock-absorbing supporting device, its one end is supported on described support arm common port, and the other end is supported on described tension cam far-end, for the flexible support of described tension cam.
Preferably, the base circle portion of described tension cam is concentric with described fixing axle.
Preferably, described shock-absorbing supporting device includes:
Amortisseur, its one end is supported on described support arm common port, and the other end is supported on described tension cam far-end;
Spring, it is set in outside described amortisseur, and one end is supported on described support arm common port, and the other end is supported on described tension cam far-end.
Preferably, described fixing axle both sides are provided with torsionspring.
Preferably, described first extension arm and the second extension arm are arc.
Preferably, described tension cam is single-degree-of-freedom cam.
Preferably, described tension cam outer peripheral edge is provided with smooth trench, is used for placing chain.
Beneficial effect
This utility model has that structure is relatively easy, good reliability, can be easily installed in the power drive system of existing chain drive; While can guarantee that best tensioning and guide effect, can effectively weaken again the adverse effect brought because its amplitude of beating in transmission process is excessive. Compared with existing tensioner, this device has the advantage such as good reliability, easy care.
Accompanying drawing explanation
Fig. 1 is the structural representation of chain tensioning device described in the utility model.
Fig. 2 is tension cam lifting curve described in the utility model.
Fig. 3 is another example structure schematic diagram of shock-absorbing supporting device described in the utility model.
Fig. 4 is another example structure schematic diagram of shock-absorbing supporting device described in the utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, this utility model is described in further detail, to make those skilled in the art can implement according to this with reference to description word.
As it is shown in figure 1, a kind of chain tensioning device based on cam that this utility model provides, including: fixing axle 100, tension cam 200, support arm 300 and shock-absorbing supporting device 400.
Wherein, fixing axle 100 maintains static, and plays fixation, and fixing axle both sides are provided with torsionspring, ensures that chain operating in transmission process is more steady.
On the sheathed fixing axle 100 in its one end of tension cam 200, and can swing around it, it is provided with smooth trench outside tension cam 200, for placing chain, the base circle portion of tension cam 200 is concentric with fixing axle 100, and can swing around fixing axle 100, smooth trench it is provided with to place chain outside the cam lift of tension cam 200, it play the guiding role, can effectively prevent chain left and right sliding in transmission process, tensioning, as shown in Figure 2, for the relation curve between cam angle and cam lift, it is approximately relational expression y=(1.74x2-0.3x+0.15) R,
Wherein, y is cam lift; X is cam radian; R is cam angle is the cam lift that zero degree is corresponding;
The lifting curve of tension cam 200 is arc, beating and swing up and down around fixing axle with chain, plays the effect of tensioning and guiding, it is possible to ensure that chain operating in transmission process is more steady.
Support arm 300, it includes common port 310, connect symmetrically arranged first extension arm 320 and the second extension arm 330 of common port 310, first extension arm 320 and the second extension arm 330 are fixed on fixing axle 100 two ends, first extension arm 320 and the second extension arm 330 are arc, do not rotate with fixing axle 100.
As it is shown on figure 3, shock-absorbing supporting device 400 includes: amortisseur, its one end is supported on described support arm common port, and the other end is supported on described tension cam far-end;
Spring, it is set in outside described amortisseur, and one end is supported on described support arm common port, and the other end is supported on described tension cam far-end; Ensure the tensioning state of chain, it is prevented that jumping frequency rate and the excessive phenomenon of amplitude occurs in transmission process in chain, and self abrasion reducing chain to beat overfrequency and aggravating, frequency that miniature amortisseur energy effective attenuation chain is beated and amplitude.
In another embodiment, as it is shown on figure 3, shock-absorbing supporting device 400, including sleeve 410, its upper and lower two ends are provided with the first magnet 421 and the second magnet 422, and one end of the first magnet 421 and the second magnet 422 identical polar is oppositely arranged; Spring, including the first spring 431 and the second spring 432, wherein, first spring 431 one end connects the first magnet 421, the other end is fixed on the common port 310 of support arm 300, and second spring 432 one end connects the second magnet 422, and the other end is fixed on tension cam 200 distal bottom, and under the complete compressive state of spring, the first magnet 421 and the second magnet 422 are not fitted completely.
First magnet 421 is electromagnet, second magnet 422 is permanent magnet, it is provided with rubber washer 423 between first magnet 421 and the second magnet 422, first magnet 421 is connected to field current controller, by regulating the size of current of field current controller, could alter that the magnetic force of the first magnet 421, electric current is more big, the magnetic force of the first magnet 421 is more big, the gap of the first magnet 421 and the second magnet 422 is more big, shock-absorbing supporting device 400 extends, the magnetic force of more little first magnet 421 of electric current is more little, the gap of the first magnet 421 and the second magnet 422 is more little, shock-absorbing supporting device 400 shortens.
Shock-absorbing supporting device 400 two ends connect support arm 300 and tension cam 200 respectively, by changing the interval of the first magnet 421 and the second magnet 422 by regulating the size of current of field current controller, ensure the length of shock-absorbing supporting device 400, ensure the tensioning state of chain, prevent chain from jumping frequency rate and the excessive phenomenon of amplitude occurring in transmission process, and self abrasion reducing chain to beat overfrequency and aggravating, frequency that miniature amortisseur energy effective attenuation chain is beated and amplitude.
In another embodiment, fixing axle 100 both sides are provided with torsionspring 110, the initial position that torsionspring 100 is installed is in free state, torsionspring 100 one end is fixed on tension cam 200, and can effectively slow down chain jumping frequency rate and shock-absorbing supporting device 400 reacts on impact and the elastic force of chain, make chain remain suitable rate of tension.
In another embodiment, between bottom the common port 310 of support arm 300 and tension cam 200, it is provided with distance measuring sensor, for detecting the length of shock-absorbing supporting device 400.
In another embodiment, first magnet 421 is connected to field current controller, it is DC control circuit, the magnetic force size of the first magnet is changed by changing size of current, first magnet 421 is laminar composite, it is crossed grinding and sintering be composited by flake ferrite permanent-magnet materials and Tie Tong, when field current controller is opened, the first magnet has magnetic because of magnetoelectric effect, when field current controller is closed the first magnet because of own material in include ferrite permanent-magnet materials still there is magnetic, thus together with after ensureing power-off, the first magnet 421 will not be touched with the second magnet 422.
As shown in Figure 4, in another embodiment, it is filled with hydraulic oil in sleeve 410, under the complete compressive state of spring 430, the electromagnetic force of the first magnet 421 and the second magnet 422 is bigger than load pressure on piston movement direction in the frictional force summation of movable part, first magnet 421 is hollow shell, and the side relative with the second magnet 422 is provided with multiple micropore 421a, when the adaptation length of shock-absorbing supporting device 400 under the length of shock-absorbing supporting device 400 is less than chain the best tensioning state, reduce the electric current of field current controller, so as to diminish, the magnetic force of the first magnet 421 diminishes, the gap of the first magnet 421 and the second magnet 422 diminishes, in sleeve 410, hydraulic oil is entered by micropore 421a in the hollow shell of the first magnet 421.
When the adaptation length of shock-absorbing supporting device 400 under the length of shock-absorbing supporting device 400 is more than chain the best tensioning state, increase the electric current of field current controller, so as to become big, the magnetic force of the first magnet 421 becomes big, the gap of the first magnet 421 and the second magnet 422 becomes big, shock-absorbing supporting device 400 extends, and enters hydraulic oil in the hollow shell of the first magnet 421 and is flowed out by micropore 421a.
Lubricating oil in this embodiment plays lubrication, reduces the frictional force of movable part, is passed by the heat that the first magnet 421 and the second magnet 422 electromagnetic action produce simultaneously.
Although embodiment of the present utility model is disclosed as above, but listed utilization that it is not restricted in description and embodiment, it can be applied to various applicable field of the present utility model completely, for those skilled in the art, it is easily achieved other amendment, therefore, under the general concept limited without departing substantially from claim and equivalency range, this utility model is not limited to specific details and shown here as the legend with description.
Claims (7)
1. based on a kind of chain tensioning device of cam, it is characterised in that including:
Fixing axle;
Tension cam, on its sheathed fixing axle, and can swing around it;
Support arm, it includes common port; Common connection symmetrically arranged first extension arm of described common port and the second extension arm, described first extension arm and described second extension arm are fixed on described fixing axle two ends;
Shock-absorbing supporting device, its one end is supported on described support arm common port, and the other end is supported on described tension cam far-end, for the flexible support of described tension cam.
2. a kind of chain tensioning device based on cam according to claim 1, it is characterised in that the base circle portion of described tension cam is concentric with described fixing axle.
3. a kind of chain tensioning device based on cam according to claim 1, it is characterised in that described shock-absorbing supporting device includes:
Amortisseur, its one end is supported on described support arm common port, and the other end is supported on described tension cam far-end;
Spring, it is set in outside described amortisseur, and one end is supported on described support arm common port, and the other end is supported on described tension cam far-end.
4. a kind of chain tensioning device based on cam according to claim 1, it is characterised in that described fixing axle both sides are provided with torsionspring.
5. a kind of chain tensioning device based on cam according to claim 1, it is characterised in that described first extension arm and the second extension arm are arc.
6. a kind of chain tensioning device based on cam according to claim 1, it is characterised in that described tension cam is single-degree-of-freedom cam.
7. a kind of chain tensioning device based on cam according to claim 6, it is characterised in that described tension cam outer peripheral edge is provided with smooth trench, is used for placing chain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521107281.7U CN205298435U (en) | 2015-12-28 | 2015-12-28 | Chain tensioning ware based on cam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521107281.7U CN205298435U (en) | 2015-12-28 | 2015-12-28 | Chain tensioning ware based on cam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205298435U true CN205298435U (en) | 2016-06-08 |
Family
ID=56473028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521107281.7U Expired - Fee Related CN205298435U (en) | 2015-12-28 | 2015-12-28 | Chain tensioning ware based on cam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205298435U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106051075A (en) * | 2016-07-14 | 2016-10-26 | 广东格兰仕微波炉电器制造有限公司 | Belt-transmission shock absorption structure |
-
2015
- 2015-12-28 CN CN201521107281.7U patent/CN205298435U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106051075A (en) * | 2016-07-14 | 2016-10-26 | 广东格兰仕微波炉电器制造有限公司 | Belt-transmission shock absorption structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160608 Termination date: 20161228 |