CN101886691A - Pawl type tension device provided with novel latching mechanism - Google Patents
Pawl type tension device provided with novel latching mechanism Download PDFInfo
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- CN101886691A CN101886691A CN 201010212437 CN201010212437A CN101886691A CN 101886691 A CN101886691 A CN 101886691A CN 201010212437 CN201010212437 CN 201010212437 CN 201010212437 A CN201010212437 A CN 201010212437A CN 101886691 A CN101886691 A CN 101886691A
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- plunger
- bar
- plunger piston
- pawl
- housing
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Abstract
The invention provides a pawl type tension device provided with novel latching mechanism, relating to a pawl type tension device. The invention aims at solving the problem that the existing tensioner is poor in limit effect. The technical scheme includes: the tension device comprises a case, a plunger piston is arranged in the containing cavity on the case, under the action of an inner cavity spring arranged at the bottom of the containing cavity, the plunger piston can move forward and backward in the containing cavity and the front end part of the plunger piston can partially stretch out of the containing cavity, one side of the plunger piston is opened with a bar-type tooth, a pawl is movably connected on the case, and the pawl tooth of the pawl is meshed with the bar-type tooth to limit the plunger piston to stretch out only but not draw back, the side of the plunger piston corresponding to the bar-type tooth is opened with a bar-type groove, when the plunger piston is completely located in the containing cavity, the position corresponding to the bar-type groove on the case is opened with a pin hole, a pin can be simultaneously inserted in the pin hole and the bar-type groove, so as to limit the plunger piston to move forward. The invention is mainly applied to applying tension to timing chain of vehicle engine.
Description
Technical field
The present invention relates to a kind of pawl type stretcher, particularly relate to a kind of pawl type tension device that plunger in the stretcher is had better limit function.
Technical background
Between the bent axle of motor and cam in the timing chain transmission device of transferring power, be extensive use of the pawl type stretcher always, it applies suitable tension force by plunger to the slack-side of timing chain, is used to cushion vibration and the inhibition transmission noise that motor is produced at work.
Pawl type stretcher plunger all is in off-position before installation, be that the plunger extended position is lower than the real work position, be beneficial to the motor assembling and prevent the assembling interference, after being assemblied in it on motor, plunger is stretched out to chain apply suitable tension force, and to make stretcher realize this function, need on stretcher, to design position-limit mechanism, plunger is in the setting restriction site when unassembled to reach, after finishing, assembling removes the limit function of this mechanism, so that plunger extend out to the working position.
In the prior art,, all be to adopt of the rotation of restriction ratchet around axle in order to limit the initial mounting point of plunger, because of the rotation of ratchet limited, be subjected under the effect of spring force protrudingly when plunger, plunger side one bar shaped tooth contacts with pawl teeth, and plunger is limited in this position.The structure that realizes this ways to restrain generally adopts ratchet and axle to cross drive fit, and axle cooperates with the locking plate riveted joint.And by a steel wire latch a pre-processed spacing hole on the stretcher housing is run through mutually with the locking plate spacing hole, the rotation by the restriction locking plate reaches the purpose of restriction plunger in initial mounting point.
Said structure stretches out by the restriction of the spacing hole on housing plunger, must guarantee some in this process: locking plate has the enough power of riveting tightly with axle, does not rotate when being subjected to warping force to guarantee axle; Axle has enough close-fitting resultants with ratchet, does not produce rotation to guarantee ratchet when the restriction plunger stretches out; Locking plate hole and housing bore align at the center when assembling.
From foregoing description as can be seen, the shortcoming of prior art is mainly in the following aspects: cooperating easily and go wrong between ratchet and the axle, ratchet rotation and can not limit stretching out of plunger; Ratchet when assembling by pressure break or recessive crackle occurs, make assembly when assembling, scrap or lost efficacy at work; Rotate relative of axle with locking plate, and can not limit stretching out of plunger; Assembly is when assembling, and housing bore and locking plate hole do not align, and latch can not insert housing bore and locking plate hole simultaneously.
Summary of the invention
The purpose of this invention is to provide a kind of simple in structure, the spacing pawl type tension device that more effectively has novel latching mechanism.
For achieving the above object, the technical solution used in the present invention is: the pawl type tension device with novel latching mechanism, comprise housing, plunger is arranged in the receiving cavity on the housing, under the effect of the inner chamber spring that bottom receiving cavity, is provided with, plunger can move forward and backward in receiving cavity and the plunger front end can partly stretch out receiving cavity, offer the bar shaped tooth on one side of plunger, ratchet is movably connected on the housing, and can limit plunger after the engagement of the pawl teeth of ratchet and bar shaped tooth can only stretch out and can not retreat, offer a bar-shaped trough on the side of described plunger with respect to the bar shaped tooth, when plunger all is in receiving cavity, offer a pin-and-hole with the corresponding position of bar-shaped trough on the housing, latch can be inserted in simultaneously and be used to limit plunger in pin-and-hole and the bar-shaped trough and move forward.
Described ratchet is movably connected on the housing by bearing pin, and wherein ratchet and bearing pin flexibly connect, and bearing pin is fixedlyed connected with housing.
From the feature of the invention described above as can be seen, its advantage is:
1, reduces the number of spare parts of limting mechanism, reduced cost;
2, lockable mechanism is simple, has increased assembling stability, locking reliability;
3, reduce assembling difficulty, improved manufacturing efficiency;
4, the present invention has realized the function that the restriction plunger stretches out under the condition that does not change prior art products basic structure.
Description of drawings
The present invention will illustrate by way of compared with accompanying drawings and combined with example:
Fig. 1 is an assembly structure schematic representation of the present invention
Fig. 2 is a structure cross-sectional schematic of the present invention
The 4th, inner chamber spring 5 is that bar shaped tooth 6 is that ratchet 7 is pawl teeth
The 8th, bar-shaped trough 9 is that pin-and-hole 10 is that latch 11 is bearing pins
Embodiment
The present invention is described further by embodiment below in conjunction with accompanying drawing:
Preferred embodiment
The pawl type tension device that has novel latching mechanism as depicted in figs. 1 and 2, cancelled the locking plate that is used to limit detent positions in the middle of the prior art, locking plate hole and latch and hinge last etc., the one side of bar shaped tooth 5 begins a bar-shaped trough 8 relatively on plunger 2, offer a pin-and-hole 9 with bar-shaped trough 8 corresponding positions on the housing 1, in the time of in plunger 2 is in receiving cavity 3, the position consistency of bar-shaped trough 8 and pin-and-hole 9, by a latch 10 pin-and-hole 9 and bar-shaped trough 8 are limited in together, being used to limit plunger 2 outwards moves, this moment, whole pawl type stretcher was in off-position, when needs are in the real work position with plunger 2, only latch 10 need be taken out, this moment, plunger 2 outwards moved under the effect of inner chamber spring 4 up to being in the real work position, ratchet 6 is in engagement with restriction plunger 2 with the bar shaped tooth 5 of plunger 2 then, and plunger 2 can only shift out and can not move backward this moment.
For the better position to ratchet 6 is limited, we are movably connected in ratchet 6 on the housing 1 by bearing pin 11, and wherein ratchet 6 flexibly connects with bearing pin 11, and bearing pin 11 is fixedlyed connected bearing pin 11 and housing 1 drive fit in other words with housing 1.
Disclosed all features in this specification except mutually exclusive feature, all can make up by any way.
Disclosed arbitrary feature in this specification (comprising any accessory claim, summary and accompanying drawing) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or the similar characteristics.
Claims (2)
1. the pawl type tension device that has novel latching mechanism, comprise housing (1), plunger (2) is arranged in the receiving cavity (3) on the housing (1), under the effect of the inner chamber spring (4) that bottom receiving cavity (3), is provided with, plunger (2) can move forward and backward in receiving cavity (3) and plunger (2) front end can partly stretch out receiving cavity (3), offer bar shaped tooth (5) on one side of plunger (2), ratchet (6) is movably connected on the housing (1), and can limit plunger (2) after the engagement of the pawl teeth (7) of ratchet (6) and bar shaped tooth (5) can only stretch out and can not retreat, it is characterized in that offering a bar-shaped trough (8) on the side of described plunger (2) with respect to bar shaped tooth (5), when plunger (2) all is in receiving cavity (3), housing (1) is gone up and the corresponding position of bar-shaped trough (8) offers a pin-and-hole (9), and latch (10) can be inserted in simultaneously and be used to limit plunger (2) in pin-and-hole (9) and the bar-shaped trough (8) and move forward.
2. the pawl type tension device with novel latching mechanism according to claim 1, it is characterized in that ratchet (6) is movably connected on the housing (1) by bearing pin (11), wherein ratchet (6) flexibly connects with bearing pin (11), and bearing pin (11) is fixedlyed connected with housing (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010212437 CN101886691A (en) | 2010-06-29 | 2010-06-29 | Pawl type tension device provided with novel latching mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010212437 CN101886691A (en) | 2010-06-29 | 2010-06-29 | Pawl type tension device provided with novel latching mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101886691A true CN101886691A (en) | 2010-11-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010212437 Pending CN101886691A (en) | 2010-06-29 | 2010-06-29 | Pawl type tension device provided with novel latching mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101886691A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103671773A (en) * | 2012-09-17 | 2014-03-26 | 重庆长安汽车股份有限公司 | Hydraulic tensioner for timing chain of engine |
| CN105736655A (en) * | 2014-12-09 | 2016-07-06 | 舍弗勒技术有限两合公司 | Ratchet type hydraulic tensioner |
| CN105805249A (en) * | 2016-04-28 | 2016-07-27 | 广州汽车集团股份有限公司 | Timing chain moving guide way and tensioning system |
| CN111188821A (en) * | 2018-11-14 | 2020-05-22 | 舍弗勒技术股份两合公司 | Chain tensioner |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1532388A (en) * | 2003-03-20 | 2004-09-29 | �������ɡ�Ī��˹TEC�ձ���ʽ���� | Hydranlic tensioner |
| JP2007516386A (en) * | 2003-07-03 | 2007-06-21 | ザ ゲイツ コーポレイション | Adjustable tensioner |
| CN101514644A (en) * | 2008-02-18 | 2009-08-26 | 株式会社椿本链索 | Hydraulic tensioning device |
| DE102008059191A1 (en) * | 2008-11-27 | 2010-06-02 | Schaeffler Kg | Clamping unit for a traction device clamping device |
-
2010
- 2010-06-29 CN CN 201010212437 patent/CN101886691A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1532388A (en) * | 2003-03-20 | 2004-09-29 | �������ɡ�Ī��˹TEC�ձ���ʽ���� | Hydranlic tensioner |
| JP2007516386A (en) * | 2003-07-03 | 2007-06-21 | ザ ゲイツ コーポレイション | Adjustable tensioner |
| CN101514644A (en) * | 2008-02-18 | 2009-08-26 | 株式会社椿本链索 | Hydraulic tensioning device |
| DE102008059191A1 (en) * | 2008-11-27 | 2010-06-02 | Schaeffler Kg | Clamping unit for a traction device clamping device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103671773A (en) * | 2012-09-17 | 2014-03-26 | 重庆长安汽车股份有限公司 | Hydraulic tensioner for timing chain of engine |
| CN105736655A (en) * | 2014-12-09 | 2016-07-06 | 舍弗勒技术有限两合公司 | Ratchet type hydraulic tensioner |
| CN105736655B (en) * | 2014-12-09 | 2020-02-18 | 舍弗勒技术有限两合公司 | Ratchet type hydraulic tensioner |
| CN105805249A (en) * | 2016-04-28 | 2016-07-27 | 广州汽车集团股份有限公司 | Timing chain moving guide way and tensioning system |
| CN111188821A (en) * | 2018-11-14 | 2020-05-22 | 舍弗勒技术股份两合公司 | Chain tensioner |
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| PB01 | Publication | ||
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| C12 | Rejection of a patent application after its publication | ||
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Open date: 20101117 |