CN108291616A - It is integrated with the stretcher of non return part and locking piece - Google Patents

Abstract

The present invention relates to a kind of stretcher (1),Including main body (2),The main body accommodates piston (3),The piston relative to main body (2) slide and by the first return mechanism (4) from leave at main body (2) return,Main body (2) includes pawl (5) on the region of its periphery,The pawl is arranged on axis (6) and is equipped with the first stopper (5a),To be engaged simultaneously then by pawl (5) in the tooth (5a with a recess (7a) in the recess (7a) of piston (3) serial (7) in the downstream of the departure direction relative to piston (3) of pivotal axis (6) by the tooth (5a),5b) place's stinging brake and realize non-return to piston (3),It is characterized in that,Pawl (5) includes locking teeth (5c),To nibble stinging brake and realizing locking for merga pass pawl (5) in the recess (7a) of the upstream of axis (6) and recess serial (7) by the tooth (5c).

Description

It is integrated with the stretcher of non return part and locking piece

Technical field

The present invention relates to a kind of stretchers being integrated with non return part and locking piece.

Background technology

Hydraulic chain adjuster includes the main body for limiting interior room, and interior room fills hydraulic fluid, main body at least portion inside it Point ground accommodates piston, and piston slides relative to main body and returns to original position from main body from stretching out in by spring.Interior room connects everywhere Hydraulic fluid source under pressure.Piston excessively suddenly returns in main body in order to prevent, and hydraulic tensioner may include non-return Device.

Chain tensioning device has had check device.These check devices, which usually have, to be pivotly assembled in main body Pawl and equipped with being engaged on tooth in a series of recesses that piston includes.These check devices are locked by two kinds of locking system It is fixed.

The locking system of the first type for check device is using must take out and reinsert from stretcher (jeter) pin rod (pige) or pin.The locking system of second of type for check device is using under the effect of gravity The pivot hook of unlock.

For the stretcher of the locking system equipped with pin, which can be assembled in certain applications of chain, example Such as in the structure of well formula chain engine.In addition, the pin that should be taken out in an assembling process before assembly may be unexpected It loses, to no longer can guarantee its locking effect.Finally, this locking system equipped with pin is needed using at least one additional Component.

For the stretcher by the locking system of Gravity-lock, caused problem is that it needs and passes through weight Power unlocks the orientation to match, this is sometimes impossible in certain applications of chain.It is this by Gravity-lock Locking system another disadvantage is that its need three additional components, in addition to generate material, high quality manufacture and fit on Cost except, also generate the additional source of trouble.

Document US-A-4 822 320 discloses a kind of stretcher of the ratchet type with main body and sliding plunger, uses In the tension for the chain for keeping being wrapped on gear, pinion gear or pulley.A series of recesses that piston includes with pivotly connect It is connected to the pawl engagement of main body.

In such assembling, piston cannot be exited or be returned completely, because in both cases, piston all can Make pawl overturning for be resisted against on the side of the relevant spring of pawl, so as to make pawl return to some position.The pawl can It can stop piston so that piston can only be assembled in unique extreme position, positioned away from completely for piston herein.

Invention content

Therefore, be based on problem of the invention is that, for hydraulic chain adjuster be equipped with it is associated with the check device of piston Piston locking system, which does not have the system for unlocking equipped with pin or lacking by the hook system of gravity unlocking It falls into.

In order to realize the purpose, according to the present invention, a kind of stretcher, including main body are provided, the main body is inside it Accommodating piston at least partly, the piston is slided relative to main body and is returned from main body by the first return mechanism from leaving, Main body includes pawl on the region of its periphery, and the pawl is arranged on pivotal axis relative to main body and is equipped with the first non-return Tooth, with a recess by the tooth in the downstream in the direction of pivotal axis left relative to piston and the recess series of piston It engages and check function of the piston in main body, feature is then ensured to the brake of stinging of piston at the stopper by pawl It is, pawl includes locking teeth, and merga pass spine is nibbled with a recess by the tooth in the upstream of pivotal axis and recess series Pawl ensures the lock function of piston left relative to main body at the tooth to the brake of stinging of piston.

Have the technical effect that there is single-pawl, a combination thereof to be exclusively used in the tooth of non-return and be exclusively used in another tooth of locking, And therefore the locking system of the piston of stretcher is directly integrated into the non-return system of the piston.This allows no longer to need existing The use of the hook to pin and by gravity proposed in technology, and therefore reduce the quantity of component, to improving property Energy.Thus obtained lock function no longer needs to orient relative to gravity direction.

Each supplementary features can be set alone or in combination：

In a variant, pawl is associated with the second return mechanism, and second return mechanism is arranged so that pawl It is pivoted to the updrift side of the departure direction relative to piston.

In a variant, pawl includes supporting area, can realize that pawl is strong downstream to the pressure of the supporting area System pivots, to contribute to the disengagement of stopper and the placement of locking teeth.

In a variant, the pawl includes the second stopper, is suitable for the recess in the downstream of pivotal axis and piston Engagement, second tooth and the first tooth coordinate to provide between overturning (basculement) of the pawl in recess and non-return locking Piston upstream direction translation distance, the distance be more than recess between distance.

In a variant, recess series includes the wall for the upstream end thereof for limiting series, and the wall is higher than recess, locking teeth Radius and stopper radius and their differential seat angle be chosen to be resisted against work outside recess series when locking teeth When beyond the Great Wall, piston is resisted against by stopper on the wall of end to keep.

In a variant, the stretcher is the hydraulic tensioner for accommodating hydraulic fluid.Hydraulic tensioner helps It is left in position in piston is maintained at it.

The invention further relates to a kind of closure belt or the transmission components of chain, which is characterized in that the transmission component includes Belt or the tensioning of the chain device as described above for being tensioned closure.

The invention further relates to a kind of Thermal Motors, which is characterized in that it includes this transmission component.

The invention further relates to a kind of methods locking stretcher according to the present invention by user, which is characterized in that Since the initial position that piston is kept by the stopper being arranged on the pawl in the recess series for being inserted into piston：

User applies pressure to the supporting area of pawl, makes that it is pivoted downstream and stopper leaves and its phase Associated recess then applies pressure to piston, pushes it to body interior until desired latched position, pressure is protected always It holds on pawl,

Gradually release is to the pressure of piston, while keeping the pressure to pawl so that pawl upstream direction pivot and Locking teeth is introduced at the desired latched position relative to main body in recess series,

Discharge the pressure to the supporting area of pawl.

In a variant, wherein since desired latched position, piston is pressed with second by upstream direction Pivot pawl upstream direction under the action of return mechanism to allow locking teeth to be discharged from the recess that it is inserted into, to unlock Piston.

Description of the drawings

By reading the specific implementation mode that is hereafter provided with non-limiting example and with reference to attached drawing so that of the invention its Its feature, objects and advantages are shown, and wherein：

- Fig. 1 is according to the present invention include the locking system formed by the pawl of three teeth hydraulic tensioner decomposition The schematic diagram of perspective view,

- Fig. 2 to Figure 10 and Fig. 2 a to Figure 10 a is hydraulic tensioner respectively and a series of mating recesses for including with piston Pawl longitudinal sectional view, Fig. 2 a to Figure 10 a show various lockings and non-return in the way to enlarge relative to Fig. 2 to Figure 10 Position, Fig. 9 b are the enlarged cross-sectional views that the third tooth of pawl is contacted with the recess that piston includes in the position of Fig. 9 and Fig. 9 a, are owned Hydraulic tensioner and pawl in these attached drawings are hydraulic tensioners and pawl according to the present invention.

Hereinafter, in combination with reference to all attached drawings.When with reference to one or more certain figures, these attached drawings By reference numeral signified for identification together with other attached drawings.

Specific implementation mode

Referring especially to Fig. 1, hydraulic tensioner is shown in a manner of decomposition perspective view.According to preferred embodiment, this hair Bright to be related to a kind of hydraulic tensioner 1, which can be adapted for the transmission component of the chain being closed or belt.Hydraulic pressure Tight device 1 includes the main body 2 for limiting interior room, and interior room fills hydraulic fluid, and main body is accommodated at least partly relative to master inside it Body 2 slide and by the first return mechanism from stretch out in from main body 2 return piston 3.Especially as shown in Figure 1, in order to simplify See, the first return mechanism can be the form of the first spring 4.Piston 3 may include the blind indent for being labeled as 9 in other attached drawings Portion is connected to the interior room of main body 2 and accommodates the first spring 4 at least partly.

Main body 2 includes pawl 5 on the region of its periphery, which is assembled on the stiff shaft 10 kept by main body 2, should Axis 10 is used as the pivotal axis 6 relative to main body 2.Pawl 5 ensures non-return effect of the piston 3 in main body 2.In this embodiment, Pawl 5 is additionally provided with the first tooth and the second tooth 5a, 5b, hereon referred to as stopper, the stopper are engaged on the recess that piston 3 includes In the series 7 of 7a, to limit movement of the piston 3 relative to main body 2.The series 7 of recess 7a extends in the length of piston 3, changes Yan Zhi, recess 7a extend at least in the part that the length by piston 3 limits along the length direction of piston.

For simplicity, only there are one recesses to be labeled as 7a in figure, but the label 7a of the recess is for recess Any other recess in row 7 is all effective.These the first tooth 5a and the second tooth 5b ensure stopping for the piston 3 in main body 2 Function is returned, this will be described more fully with later.Piston 3 is maintained at its departure direction by two tooth 5a, no one of 5b teeth On.In this embodiment, the cooperation of two teeth at the pawl 5 between the entering and leaving of piston 3 for realizing lag (hyst érésis)。

According to the present invention, pawl 5 includes third tooth 5c, and third tooth 5c is also known as locking teeth, and penetrate recess 7a is To ensure locking of the piston 3 relative to main body 2 in the return position of piston 3 in row 7, that is, prevent piston 3 from being returned by first Device 4 leaves movement.Therefore, lock function is related to the check function on identity element, the identity element, that is, pawl 5.Cause This, need not be by using locking system of the gravity equipped with hook or including removable locking member (such as pin) System.

Stroke of the pivotal axis 6 of pawl 5 basically perpendicular to piston 3 extends.Pawl 5 is associated with the second return mechanism.This A little second return mechanisms are configured to that 5 upstream direction of pawl is made to pivot, and limit upstream relative to the departure direction of piston 3 herein The downstream and.Especially as shown in Figure 1, for simplicity, the second return mechanism can be the form of the second return spring 8.

Second return spring 8 can be contained in the groove formed in main body 2, and one end of second spring 8 is against groove Bottom, and the other end of second spring 8 is against pawl 5.

Fig. 2 to Fig. 4 and Fig. 2 a to Fig. 4 a shows check function present in hydraulic tensioner referring concurrently to Fig. 1.When When hydraulic tensioner 1 is not yet full of oil, the movement of the function restriction piston 3 during the starting stage of engine, the oil leads to It crosses limitation movement and ensures damping function, while avoiding the irritating sound and/or abnormal sound of sonic boom type.

Fig. 2 and Fig. 2 a combinations Fig. 1 shows first position or overturning (basculement) threshold value.When the piston 3 of main body 2 When leaving, pawl 5 is overturn under rolling (the d é filement) effect of the recess 7a of piston 3 on its axis 6, and wherein recess is inserted into In the tooth 5a, 5b of pawl 5.When piston 3 leaves, piston 3 and pawl 5 occupy 5b pairs of vertex and the tooth of their recess 7a Neat position (Fig. 2 a).Second return mechanism 8 tends to that pawl 5 is made to rotate along updrift side, and the updrift side is and piston 3 In the opposite direction, then leaving for piston 3 causes tooth 5b to reinsert in recess 7a for the side left, but is specifically piston 3 Including series 7 recess N+1, and recess N is the recess previously engaged.

Fig. 3 and Fig. 3 a combinations Fig. 1 shows the second position of the latched position as non-return.When tooth 5a, 5b are inserted into recessed When in mouth 7a, so that piston 3 is returned at the tooth 5a, 5b for causing pawl 5 in the recess 7a for being inserted into piston 3 and sting brake (arc- boutement).The contact point of tooth 5a, 5b in their recess 7a is aligned relative to piston 3 with the rotary shaft 6 of pawl 5 Point P stings brake towards displaced downstream, to allow for this.In order to allow this to sting brake, the relevant radii Ra and Rb of tooth 5a and 5b More than the distance of 6 range points P of axis.This brake of stinging allows for check function.Therefore piston 3 cannot return to the master of stretcher 1 In body 2.

There are a lag areas between being referred to as the first position and the second position that turn threshold and non-return lock.By In the geometry of the tooth 5a, 5b of pawl 5, the cooperation of pawl 5 makes when a flip occurs, and tooth 5b changes recess but tooth 5a exists It stings in brake position and is not yet in its recess.Therefore, piston 3 can be moved back in main body 2 and pawl 5 is due to the second return spring 8 is pivoted, stings brake position until tooth 5a is reached, in other words reaches non-return latched position.Advantageously, this to be arranged such that piston 3 return on the translation direction in main body 2 in piston 3 with certain degree of freedom, flip bit of the pawl in recess 7a The distance for setting the translation between non-return latched position is more than distance between recess 7a.Pass through the good of the transmission component of chain or belt Good luck row needs the lag area.

With reference to Fig. 4 to Figure 10, Fig. 4 a to Figure 10 a and Fig. 9 b, locking and unlocking function, the locking will be described in now It is realized by the same pawl 5 equipped with locking teeth 5c with unlocking function.

Fig. 4 and Fig. 4 a combinations Fig. 1 shows the first position in locking means.In this position, hydraulic tensioner 1 is being torn open It is completely removed after unloading or unlocking.Then, the hydraulic tensioner 1 of unlock leaves piston 3 under the action of the first spring 4, Tooth 5b is turned to another recess up to the upstream end of the series 7 of recess from a recess.The geometry of pawl 5 does not allow piston 3 pop up from the main body 2 of hydraulic tensioner 1, because piston 3 is held against by the second tooth 5b of pawl 5 is limiting series 7 On the wall 7b of upstream end, wall 7b is disposed above recess 7a so that leaving for piston 3 further pivots pawl 5.Then, Third tooth 5c with the rotation of blocking pawl 5 and prevents tooth 5b from leaving wall 7b against piston 3.The radius Rc (Fig. 8) of locking teeth and only The radius Rb (Fig. 3 a) and these differential seat angle for returning tooth 5b are chosen to be resisted against outside the series 7 of recess as locking teeth 5c Piston 3 on when, piston 3 is resisted against by stopper 5b and is kept on the wall 7b of end.

It should be noted that since fluid generates damping action, it can not filled with the especially oily hydraulic tensioner 1 of hydraulic fluid It is locked or is difficult to be locked.Lock step only for not yet fill the new hydraulic tensioner 1 of hydraulic fluid be only it is possible. It should also determine the second spring 8 that the size of pawl 5 and selection make pawl 5 return so that itself and the manual force for being applied to pawl 5 It matches.

Therefore, the initial position in locking means according to the present invention can be that hydraulic tensioner 1 does not include hydraulic fluid And piston 3 is located at the position for leaving main body 2 completely as shown in Fig. 4 and Fig. 4 a.

Fig. 5 and Fig. 5 a combinations Fig. 1 shows the second position in locking means.Pawl 5 can have supporting area 5d.Such as Pressure of the finger of user on the 5d of supporting area so that (therefore opposite with second spring 8) is forced pivot to pawl 5 downstream Turn, is detached from so as to cause a recess 7a in the series 7 of the second tooth 5b recesses for including with piston 3.

Tooth 5a to 5c and supporting area 5d can be carried by the periphery of pawl 5.First tooth and the second tooth 5a and 5b can be opposite In close to each other, to penetrate in each close recess 7a, but it is not necessarily adjacent in the series 7 of recess 7a.

For example, the corresponding recess 7a of the first tooth 5a and the second tooth 5b can among them be inserted into and there are recesses.The Three tooth 5c are positioned at certain intervals relative to the first tooth 5a and the second tooth 5b.Three tooth 5a to 5c direction pistons 3, and supporting area 5d In a part for the periphery of pawl 5, a part for the periphery of pawl 5 is radially almost with 5 periphery of pawl with tooth The region of 5a to 5c is opposite.

Advantageously, supporting area 5d is in the form of step, for allowing the finger of user to be placed against the step.

Therefore, pressure of the finger of user on the 5d of supporting area ensures that pawl 5 maintains the second tooth 5b and is detached from from recess 7 This position in.This allows the inside for the main body 2 for making piston 3 back to hydraulic tensioner 1.With reference to Fig. 5, used first Then the bearing of the finger of person can carry out the return of piston 3.

Fig. 6 to Fig. 9, Fig. 6 a to Fig. 9 a and Fig. 9 b combinations Fig. 1 show the third place in locking means.In the position At the end of, hydraulic tensioner 1 is locked, and piston 3 returns in the main body 2 of hydraulic tensioner.

Since the latched position as shown in Fig. 6 and Fig. 6 a, piston 3 is pressed into return position.Than in previous step The manual force of manual force bigger can further compress the second spring 8 of pawl 5, and therefore two recess 7a of piston 3 it Between engagement for locking third tooth 5c.It should be noted that the locking is suitable for difference of the piston between pairs of different recesses 7 Position, such as hydraulic tensioner 1 can be locked in midway.

Therefore, in this step according to the method for the present invention, the finger of user applies pressure to the supporting area of pawl 5 Power makes pawl pivot downstream, and the second tooth 5b leaves from recess associated there, and then the hand of user is to work 3 application pressure of plug is to which piston to be pushed in main body 2, and until reaching desired latched position, the pressure of finger remains On the supporting area of pawl 5.

Then, as shown in Fig. 7 and Fig. 7 a, the Manual pressure being applied on piston 3 gradually discharges, while keeping finger to spine The bearing of pawl 5, so that it is guaranteed that good engagements of the third tooth 5c of pawl 5 between the recess 7a of piston 3.

In addition, as shown in Fig. 8 and Fig. 8 a, once the Manual pressure on piston 3 discharges completely, on the supporting area of pawl 5 The pressure of finger can also be released.Since the first spring 4 is used to make piston from the power for stretching out in the return of main body 2, piston 3 is still protected It holds in return position.Piston 3 can not leave, because when third tooth 5c is engaged in recess 7a, the first return mechanism 4 is by piston It releases, pawl 5 is caused to sting brake at locking teeth.Rotation with pawl 5 of contact points of the tooth 5c in its recess 7a relative to piston 3 The point P that shaft 6 is aligned is deviated towards upstream, this makes it possible to achieve this and stings brake.In other words, the radius Rc of tooth 5c is more than 6 distance of axis The distance of point P.In order to keep system reliable and be in equilibrium state, it is transmitted to the force compensating and pawl 5 of the first spring 4 of pawl 5 The power of associated second spring 8.

In the lock step, gradually discharge the pressure on piston 3, then unclamps bearing of the finger to pawl 5 The pressure in area.This causes 5 upstream direction of pawl to pivot, and third tooth 5c is introduced into the series 7 of recess 7a, to make Piston 3 locks in place relative to main body 2.

The gradual release of piston 3 combines the movement for maintaining the permission of the Manual pressure on pawl 5 along with piston 3.Once Pressure on piston 3 discharges completely, and pawl 5 would not move, because the torque that the first spring 4 generates on tooth 5c is more than second The torque that spring 8 generates on pawl 5, this is forced stings brake on third tooth 5c.

The unlock of piston 3 will now be described.Fig. 9,9a and 9b show the first unlocked position, which is root According to the position of the unlock threshold value in the unlocking method of the present invention.

Piston 3 is simply pressed by upstream direction unlocks hydraulic tensioner 1 from latched position to execute.In hydraulic pressure After stretcher 1 is installed with locking mode, during the first time of engine starts, which can be manually or by drawing What the movement of the removable guiding piece of guide chain item generated.

With locking on the contrary, 5 upstream direction of pawl pivots.Then the displacement of piston 3, which reaches, allows third tooth 5c second The threshold value being detached under the return action of spring 8.When third tooth 5c is no longer held in recess, Fig. 9 b are shown in the way to enlarge Third tooth 5c leaves recess on the point of its recess 7a, and pawl 5 is no longer by the third between two recess 7a of piston Tooth 5c is kept, and continues up roam all around the would to pivot under the action of second spring 8, is located at recess 7a until being changed to tooth 5b In.Due to previously holding the movement after line-locked third tooth 5c is no longer detached from piston 3 on the contrary, therefore the disengaging will make work again The movement of plug 3 outward is possibly realized.

Figure 10 and Figure 10 a show the second unlocked position, which is the operating position of hydraulic tensioner 1, And the operating position of the piston 3 after lock set is especially solved in locking means.

Once the disengaging step of third tooth 5c is completed, piston 3 is just escaped freely out to reach its operating position, such as against On the removable guiding piece for the chain that hydraulic tensioner should be tensioned, or if hydraulic tensioner 1 is unassembled starting In machine or when removing, piston returns to its position initially occupied, and in other words, stretcher moves (d é completely after removal Battu position).

Therefore, in the unlocking method after locking means mentioned above, in hydraulic tensioner associated with chain First time during use, Manual press to the free end of piston or the pressing generated by the movement of chain lead to pawl 5 Upstream direction pivots, this is opposite with locking.It is then advantageous to the recess that ground is inserted under the action of second spring 8 from third tooth Third tooth 5c is discharged in 7a, and generates the movement that piston 3 stretches out in main body.

Therefore, such hydraulic tensioner can be a part for the chain being closed or the transmission component of belt, piston It free end can be against intermediate system itself and with chain or belt contacts so that it is tensioned.In the case of chain, centre system System e.g. chain guide.In the case of belt, intermediate system can be guide wheel.The chain or belt of closure can be heat The chain or belt of the distributor of force engine, the engine can be provided on vehicle.

Hydraulic tensioner according to the present invention has the following advantages：Non-return system using the pivotable pawl equipped with tooth is same When can also realize the locking of piston, this only needs to make modification slightly to pawl, i.e., increases third tooth or locking teeth on pawl. The non-return and locking system of piston realize this two functions using identical component.

Compared with the non-return system for the separation that the prior art provides and system for unlocking, the combination of this non-return and locking system The non-return system of separation and the number of components of locking system can be reduced, four components rather than seven components are only needed.This is also The quality and robustness of hydraulic tensioner can be improved, and reduces the component that may be broken down or fail.

This locking system is unrelated with gravity direction, and there is no need to specific positions.Such system is provided with for making The supporting area of the finger of user so that it can be manually locked without tool.

The performance of system enhancement locking.Manual locking is simplified and is not necessarily to increased element, and the locking system It is unrelated with gravity.

The present invention is not limited to described embodiments.In modification, pawl may only there are one stoppers.However, at this Kind in the case of, since there is no the second stopper, thus can not upstream direction obtain be more than recess between lag area.Another In a modification, stretcher can not be hydraulic pressure, in other words, assist maintaining piston without accommodating hydraulic fluid.

Claims (10)

1. a kind of stretcher (1), including main body (2), the main body accommodates piston (3), the work at least partly inside it Plug is slided relative to main body (2) and by the first return mechanism (4) from return at main body (2) is left, and main body (2) is in its periphery Include pawl (5) on region, the pawl is arranged relative to main body (2) on pivotal axis (6) and is equipped with the first stopper (5a), With serial in the downstream in the direction of pivotal axis (6) left relative to piston and the recess (7a) of piston (3) by the tooth (5a) (7) then a recess (7a) engagement in simultaneously carrys out the brake of stinging of piston (3) at the stopper (5a, 5b) by pawl (5) Ensure check function of the piston (3) in main body (2), which is characterized in that pawl (5) includes locking teeth (5c), to pass through the tooth The recess (7a) of (5c) in the upstream of pivotal axis (6) and recess serial (7) nibbles merga pass pawl (5) at the tooth (5c) Stinging brake and ensure the lock function of piston (3) left relative to main body (2) to piston (3).

2. stretcher (1) according to claim 1, wherein pawl (5) is associated with the second return mechanism (8), and described Two return mechanisms are arranged so that pawl (5) is pivoted to the updrift side of the departure direction relative to piston (3).

3. the stretcher (1) according to claim 1 or claim 2, wherein pawl (5) includes supporting area (5d), to this The pressure of supporting area (5d) can realize that pawl (5) is forced to pivot downstream.

4. stretcher (1) according to any one of the preceding claims, which is characterized in that the pawl (5) includes second Stopper (5b) is suitable for engaging with the recess (7a) of piston (3) in the downstream of pivotal axis, second tooth (5a) and the first tooth (5b) cooperation is to provide the flat of piston (3) upstream direction between overturning of the pawl (5) in recess (7a) and non-return locking Distance is moved, the distance is more than distance between recess.

5. stretcher (1) according to any one of the preceding claims, which is characterized in that recess series (7) includes limiting The wall (7b) of the upstream end thereof of serial (7), the wall higher than recess (7a), the radius of locking teeth and the radius of stopper and it Differential seat angle be chosen to when locking teeth (5c) is resisted against on the piston (3) of recess serial (7) outside, piston (3) is logical It crosses stopper (5b) and is resisted against and kept on the wall (7b) of end.

6. stretcher (1) according to any one of the preceding claims, which is characterized in that the stretcher is for accommodating The hydraulic tensioner of hydraulic fluid.

7. a kind of transmission component being closed belt or chain, which is characterized in that the transmission component includes being wanted according to aforementioned right The belt or the tensioning of the chain device (1) for be tensioned closure described in any one of asking.

8. a kind of Thermal Motor, which is characterized in that it includes transmission component according to claim 6.

9. the method that one kind locking stretcher according to any one of claim 3 to 6 (1) by user, feature exist In from piston (3) by the initial of the stopper holding on the pawl (5) in recess (7a) series for being inserted into piston (3) is arranged Position starts：

User applies pressure to the supporting area of pawl (5), so that it is pivoted downstream and stopper (5a) leaves and it Associated recess (7a) then applies pressure to piston (3), and it is internal until desired locking bit to push it to main body (2) It sets, pressure remains on pawl (5),

The pressure to piston (3) is gradually discharged, while keeping the pressure to pawl (5) so that pawl (5) upstream direction pivot Turn and locking teeth (5c) be introduced at the desired latched position relative to main body (2) in recess (7a) serial (7),

Discharge the pressure to the supporting area of pawl (5).

10. according to the method described in previous item claim, wherein since desired latched position, pass through upstream direction Pressing piston (3) with make under the action of the second return mechanism pawl (5) upstream direction pivot allow locking teeth (5c) from Release in its recess (7a) being inserted into, to unlock piston (3).