CN103562595B - Stretcher - Google Patents
Stretcher Download PDFInfo
- Publication number
- CN103562595B CN103562595B CN201180071300.3A CN201180071300A CN103562595B CN 103562595 B CN103562595 B CN 103562595B CN 201180071300 A CN201180071300 A CN 201180071300A CN 103562595 B CN103562595 B CN 103562595B
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- CN
- China
- Prior art keywords
- propulsive element
- locking block
- locking
- cartridge
- locking tooth
- Prior art date
- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H7/0848—Means for varying tension of belts, ropes, or chains with means for impeding reverse motion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H2007/0802—Actuators for final output members
- F16H2007/0806—Compression coil springs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H7/00—Gearings for conveying rotary motion by endless flexible members
- F16H7/08—Means for varying tension of belts, ropes, or chains
- F16H7/0848—Means for varying tension of belts, ropes, or chains with means for impeding reverse motion
- F16H2007/0853—Ratchets
Abstract
The invention provides and for the high-frequency vibration carrying out since engine, there is good trackability and the unconfined stretcher of shape of locking block of processing of locking block can be carried out simply.This stretcher possesses the propulsive element (3) of movement of retreating vertically in the inside of cartridge (1), to the locking tooth (1c) of the outer surface of the propelling spring (4) of mobile force of propulsive element (3) forward direction, the inner surface being formed at cartridge (1) or propulsive element (3), the locking block (2) being formed with the locking tooth (21) engaged with locking tooth (1c).Locking block (2) possesses the load receiving portion (22) of load when carrying propulsive element (3) retreats, is formed with the connecting portion (24) of the above locking tooth forming portion (23) of two row of locking tooth (21), one connection locking tooth forming portion (23), and locking block is rotatable relative to cartridge (1) and propulsive element (3).
Description
Technical field
The present invention relates to the stretcher that the tension force for band or chain in order to make ring-type keeps certain.
Background technology
Such as, stretcher is pressed against timing chain or the timing belt of use in the electromotor of automobile with the power of regulation, and acts on when timing chain or timing belt elongation occur or be lax so that it is tension force keeps necessarily.
Figure 21 illustrates the state of the engine body 200 that stretcher 100 is installed on automobile.In the inside of engine body 200, being configured with pair of cams sprocket wheel 210 and crank and chain-wheel 220, timing chain 230 is formed as ring-type and is arranged between above-mentioned sprocket wheel 210,220.On the mobile route of timing chain 230, rotatably configuration chain guide 240, timing chain 230 slides along chain guide 240.Engine body 200 is formed installed surface 250, stretcher 100 be inserted on installed surface 250 formed installing hole 260, be fixed on installed surface 250 by bolt 270.In this case, unshowned lubricating oil is enclosed in the inside of engine body 200.
Figure 22 illustrates the existing stretcher 300 described in patent documentation 1.The propulsive element 310 of the shaft-like retreated vertically inserts shell 370.Propulsive element 310 is exerted a force by the propelling spring 340 being arranged in shell 370 and enters from shell 370.
In shell 370, being provided with and be kept the keeper 330 that spring 360 exerts a force along the direction of advance of propulsive element 310, supporting at this keeper 330 has two locking blocks (lockingpiece) 320.Locking block 320 is formed as the shape being split to form by solid nut, is formed with cone shape cam ramp 321 on the outer peripheral face of rear side.To this, the inner peripheral surface of keeper 330 is formed with the cam ramp 331 of cam ramp 321 contact of locking block 320.The cam ramp 331 of keeper 330 is formed as the coniform of depression.Locking block 320 is supported by support member 330 when cam ramp 321,331 contacts.350 be for by locking block 320 to keeper 330 press by pressing spring.The inner peripheral surface of locking block 320 forms locking tooth 323, the locking tooth 313 that the locking tooth 323 being simultaneously formed with locking block 320 on the outer peripheral face of propulsive element 310 is engaged and engages.
In such structure, propelling spring 340 along direction of advance, propulsive element 310 is exerted a force.Now, because locking block 320 moves the engagement releasing between the locking tooth 313 of locking tooth 323 and propulsive element 310 along expanding direction, so propulsive element 310 can enter.To this, if propulsive element 310 is acted on by overload in the reverse direction, then owing to locking block 320 moves along cam ramp 331 to undergauge direction engage with propulsive element 310 according to the power applied by pressing spring 350, the therefore retrogressing locked (lock) of propulsive element 310.By these actions, it is possible to give tension force to timing chain 230.
Look-ahead technique document
Patent documentation
Patent documentation 1: No. 3538662 publications of Japanese Patent No.
In stretcher, in order to carry the high-frequency powerful vibration of since engine, it is preferable that propulsive element 310 and locking block 320 are high to the trackability of vibration.In order to make this trackability improve, it is preferable that lightweight.But, owing to the locking block 320 in existing stretcher is formed by splitting solid nut, the problem of the good trackability that therefore there is the lightweight being difficult to locking block 320, corresponding vibration can not be obtained.
Additionally, the locking block 320 split solid nut and formed utilizes cutting or sintering to make., in machining, during divided nut, there is burr, it is necessary to while being removed, the machining cycle is extended.On the other hand, in sintering processing, the restriction of shapable shape is applied, it is difficult to carry out the processing of taper, semicircle etc., and be difficult to locking shaping of teeth.Additionally, density of material is uneven, produce shortcoming, it is impossible to obtain sufficient intensity.Further, when processing locking block 320 in the processing utilizing thin plate panel beating, the problem that there is the forming difficulty of part that sink, production shortcoming.
Summary of the invention
The present invention considers that the problems referred to above point completes, and its object is to provide a kind of stretcher, this stretcher that the high-frequency vibration carrying out since engine has good trackability, can carry out the processing of locking block simultaneously simply, and the shape of locking block does not limit.Additionally, present invention aim at providing the propulsive element when propulsive element is from engine bearing high capacity successfully carry out return action and be prevented from the stretcher of overload.
The stretcher of a first aspect of the present invention includes: propulsive element, movement of retreating vertically in the inside of cartridge；Propelling spring, exerts a force to the movement of described propulsive element forward direction；Locking tooth, is formed at the inner surface of described cartridge or the outer surface of described propulsive element；And locking block, it is formed with the locking tooth engaged with described locking tooth, the locking tooth of described locking block is configured between described cartridge and propulsive element when engaging with the locking tooth of the locking tooth or propulsive element of described cartridge to carry out propulsive element locking in the reverse direction, wherein, described locking block includes: load receiving portion, bears load when described propulsive element retreats；The locking tooth forming portion that two row are above, is formed with described locking tooth；And connecting portion, integrally connecting described locking tooth forming portion, described locking block can rotate relative to described cartridge and propulsive element.
Stretcher according to the first aspect of the invention, in second aspect present invention, in the way of making the closure that load direction that described load receiving portion bears and described connecting portion connect described locking tooth forming portion become different directions, described load receiving portion and connecting portion are arranged at the position being not directly contacted with.
Stretcher according to the first aspect of the invention, in a third aspect of the present invention, described load receiving portion be along the direction of propulsion of described propulsive element tilt coniform, be formed with the cone shape supporting surface contacted with described load receiving portion at described propulsive element or cartridge.
Stretcher according to the first aspect of the invention, in a fourth aspect of the present invention, adjusting parts and be arranged on the inside of described cartridge in revolvable mode, described adjustment parts can allow the movement to the direction of propulsion of described propulsive element of the described locking block and the movement to the radial direction intersected with described direction of propulsion.
Stretcher according to the first aspect of the invention, in a fifth aspect of the present invention, described locking block is shaped by the pressure processing to plate-shaped member.
Stretcher according to the first aspect of the invention, in a sixth aspect of the present invention, described stretcher is additionally provided with the oil pressure source making oil pressure effect, and described oil pressure makes described propulsive element advance.
Invention effect
According to the present invention, owing to being formed locking block by load receiving portion, locking tooth forming portion and connecting portion, therefore, it is possible to shape locking block by plate-shaped member, and locking block lightweight can be made.Therefore, the trackability of electromotor is good, and process simple.In addition, owing to locking block can rotate relative to cartridge and propulsive element, therefore, when propulsive element carrying carrys out the load of since engine, locking block can retreat with the engagement with cartridge, and propulsive element can carry out return action to prevent overload.
Accompanying drawing explanation
Fig. 1 is the longitdinal cross-section diagram of the stretcher of the first embodiment illustrating the present invention.
Fig. 2 is local excision's axonometric chart of the stretcher of the first embodiment.
Fig. 3 is the axonometric chart illustrating propulsive element and locking block.
The (a) and (b) of Fig. 4, (c) are the front view of locking block, top view, axonometric chart.
Fig. 5 is the chart of the trackability illustrating the vibration to electromotor.
Fig. 6 is the axonometric chart of the stretcher that the chart of Fig. 5 uses.
Fig. 7 is local excision's axonometric chart of the stretcher illustrating the second embodiment.
Fig. 8 is the axonometric chart of the stretcher of the second embodiment.
Fig. 9 is the sectional view of the stretcher illustrating the 3rd embodiment.
Figure 10 is the c-c line sectional view in Fig. 8.
Figure 11 is the partial perspective view of the stretcher of the 3rd embodiment.
The (a) and (b) of Figure 12, (c), (d) are for the front view of locking block of the 3rd embodiment, top view, rearview, axonometric chart.
Figure 13 is the sectional view of the situation of the locking block manufacturing the 3rd embodiment.
The (a) and (b) of Figure 14, (c) are to illustrate the front view of locking block of pressure forming difficulty, top view, rearview.
The (a) and (b) of Figure 15, (c) can be used for the front view of other locking blocks of the 3rd embodiment, top view, rearview.
Figure 16 is the rearview of other the first shapes illustrating locking block.
Figure 17 is the rearview of other the second shapes illustrating locking block.
Figure 18 is the rearview of other the 3rd shapes illustrating locking block.
The (a) and (b) of Figure 19, (c) are the rearviews of other the 4th shapes illustrating locking block.
Figure 20 is the sectional view of the stretcher of the 4th embodiment illustrating the present invention.
Figure 21 is configured with the side view of the engine body of stretcher.
The (a) and (b) of Figure 22 are the sectional view and the a-a line sectional view that illustrate existing stretcher.
Detailed description of the invention
[the first embodiment]
Fig. 1～Fig. 4 illustrates first embodiment of the present invention, Fig. 1 is the longitdinal cross-section diagram of the stretcher of present embodiment, Fig. 2 is mounted to the axonometric chart of the state of engine body, Fig. 3 is the axonometric chart illustrating the relation between locking block and propulsive element, and Fig. 4 is the front view of locking block, top view, axonometric chart.
The stretcher of present embodiment possesses cartridge 1, locking block 2, propulsive element 3, propelling spring 4 and by pressing spring 5.
Cartridge 1 is connected with main part 1a and the flange part 1b of rear end side (for upper end side in Fig. 1 and Fig. 2), and cartridge 1 is formed as the cylindrical shape of both ends opening.Flange part 1b is abutted by the installed surface 250 with engine body 200, thus becoming the state being fixed in engine body 200.The cartridge 1 including main part 1a and flange part 1b whole inner surface be formed with locking tooth 1c.
Locking block 2 is configured in the inside of cartridge 1 with the locking tooth 1c of cartridge 1 when engaging.Locking block 2 is formed with the locking tooth 1c of the inner surface with cartridge 1 locking tooth 21 engaged, and can rotate relative to cartridge 1 under the state that locking tooth 21 is engaged with locking tooth 1c and engages.Locking block 2 is by abutting with the supporting surface 3c of aftermentioned propulsive element 3, and is supported on supporting surface 3c.In the present embodiment, as in figure 2 it is shown, support on the circumferencial direction of propulsive element 3 and have multiple (four) locking block 2.
As shown in FIG. 1 to 3, propulsive element 3 is formed as possessing the shaft-like that the rear end side (upper end side) of big diameter section 3a and big diameter section 3a is connected the little diameter section 3b of setting.The entirety of propulsive element 3 inserts the inside of cartridge 1, and can retreat vertically relative to cartridge 1.It is formed with flange part 3d, flange part 3d in the leading section (upper end) of big diameter section 3a to abut with the chain guide 240 of engine body 200.The big diameter section 3a of propulsive element 3 is formed as the external diameter that the internal diameter than the locking tooth 1c of the inner surface of cartridge 1 is somewhat little.Accordingly, the gap of the radial direction between big diameter section 3a and the inner surface of cartridge 1 of propulsive element 3 can reduce.Seal member between 12 front end (lower end) and the propulsive elements 3 being disposed on cartridge 1, by arranging seal member 12 such that it is able to the sealing of oil pressure when guaranteeing to make oil pressure effect in cartridge 1.
The boundary portion between big diameter section 3a and little diameter section 3b in propulsive element 3 is formed with supporting surface 3c.Supporting surface 3c become diameter to the direction of advance of propulsive element 3 expand gradually coniform.Supporting surface 3c is formed as coniform, and supporting locking block 2 can rotate.
Propelling spring 4 uses coil spring.Propelling spring 4 is to insert the main part 1a inserting in cartridge 1 outside the state between the flange part 3d of propulsive element 3 and the flange part 1b of cartridge 1, and force makes propulsive element 3 enter axially into.
Formed by coil spring by pressing spring 5, between this coil spring is arranged on the pressing tablet 9 of the little diameter section 3b being installed on propulsive element 3 and is arranged in the packing ring (washer) 6 of rear side (upside) of locking block 2.By packing ring 6 locking block 2 exerted a force by pressing spring 5 and pressed on the supporting surface 3c of propulsive element 3.By this force, locking block 2 is pressed against the supporting surface 3c of propulsive element 3, and locking block 2 is exerted a force to move along expanding direction.Accordingly, the locking tooth 21 of locking block 2 and the locking tooth 1c of cartridge 1 become the engagement reducing gap of non-loosening.It addition, pressing tablet 9 utilizes C-shaped ring 10 to prevent the little diameter section 3b from propulsive element 3 from coming off.
In the present embodiment, installation lid 11 is used.Lid 11 is installed formed by the flange part 11b of lid body 11a and the outer circumferential side of lid body 11a.Lid 11 is installed for cartridge 1 and propulsive element 3 are fixed on engine body 200, with the rear side (upside) of the little diameter section 3b of the flange part 1b and propulsive element 3 that cover cartridge 1.Then, as in figure 2 it is shown, by making the bolt hole 271 of the through flange part 11b of bolt 270 and bolt 270 and engine body 200 screw togather, thus being fixed in the installed surface 250 of engine body 200.Being fixed by this, cartridge 1, propulsive element 3, propelling spring 4 are installed on engine body 200 by lid body 11a.
As shown in Figure 4, locking block 2 possesses load receiving portion 22, locking tooth forming portion 23 and connecting portion 24.Locking tooth forming portion 23 is the tabular of two row, and the locking tooth forming portion 23 of two strake shapes is connected as one by connecting portion 24.Each front end face in the locking tooth forming portion 23 of two strake shapes forms locking tooth 21.As it has been described above, locking tooth 21 is engaged with the locking tooth 1c of cartridge 1 and engages.Connecting portion 24 connects locking tooth forming portion 23 with the state of tabular.So, by locking tooth forming portion 23(locking tooth 21) connected by connecting portion 24, and become torsional rigid height, structure that mechanical strength also improves.
Load receiving portion 22 is formed as corresponding with the supporting surface of propulsive element 3 coniform.That is, load receiving portion 22 becomes coniform and with propulsive element 3 the supporting surface 3c that the direction of propulsion along propulsive element 3 tilts and carries out face and contact.Being contacted by this face, load receiving portion 22 carries load when propulsive element 3 retreats.Load receiving portion 22 is formed as conus portion, and this load receiving portion 22 contacts with being similarly formed as cone shape supporting surface 3c, thus locking block 2 can rotate relative to propulsive element 3.Accordingly, locking block 2 can rotate relative to propulsive element 3 and cartridge 1, and locking block 2 can be movable independently along direction of rotation relative to propulsive element 3 and cartridge 1.
As shown in Figure 3 and 4, due to locking block 2 without sagging (undercut) partly, formless restriction, therefore, it is possible to utilize plate-shaped member pressure processing make locking block 2.Therefore, it is not necessary to utilize cutting, sintering to make locking block 2, the making of locking block 2 becomes easy, and production is remarkable.Additionally, make locking block 2 because utilizing the pressure of plate-shaped member, so needing not to be solid structure, it is provided that the lightweight of locking block 2 and cheap.
In above stretcher, owing to locking block 2 being exerted a force by by pressing spring 5, therefore in the direction of advance of propulsive element 3, supporting surface 3c along propulsive element 3, moving in undergauge direction, owing to locking tooth 21 crosses the locking tooth 1c of cartridge 1, therefore propulsive element 3 can smoothly enter.When propulsive element 3 retreats, owing to locking block 2 is pressed by supporting surface 3c and moves up expanding side, therefore locking tooth 21 engages with the locking tooth 1c of cartridge 1.Accordingly, the retrogressing of propulsive element 3 is locked.
Additionally, due to locking block 2 can rotate relative to cartridge 1 and propulsive element 3, therefore when propulsive element 3 bears the load of since engine, being rotated by locking block 2, locking block 2 is to retreat relative to cartridge 1 with cartridge 1 engagement.Therefore, propulsive element 3 can carry out return action.Thus, even if also being able to prevent overload when tightening at engine temperature rising, timing chain 230.
Further, by utilizing the pressure processing of plate-shaped member to shape locking block 2 such that it is able to make locking block 2 lightweight.By locking block 2 lightweight such that it is able to improve the trackability to the high-frequency vibration carrying out since engine.Then, by the trackability of the high-frequency vibration carrying out since engine is uprised, additionally it is possible to reduce the load by pressing spring 5 that locking block 2 is pressed on propulsive element 3.
Fig. 5 marks and draws the vibration of since engine at transverse axis, marks and draws the chart of thrust in order to vibrate servo-actuated required propulsive element 3 with it at the longitudinal axis.The chart of Fig. 5 is the diameter of the big diameter section 3a in the propulsive element 3 shown in Fig. 6 be 16mm, little diameter section 3b diameter be 6mm, the supporting surface 3c of this propulsive element 3 installs two locking blocks constitute and make to carry out, by the stretcher of pressing spring 5 effect, the result that Theoretical Calculation obtains.Curve M illustrates the measurement result of the locking block 2 of present embodiment.As locking block 2, the sheet material of the thickness of slab 1mm that pressure processing is made up of carbon steel is used to become the material of external diameter 16mm, internal diameter 6mm, high 10mm, wide 8mm.This locking block 2 weight is 1.0g.Curve L and the identical material of locking block 2 of present embodiment, same size and same number, it is the calculated results of the situation at the locking block 2 using solid construction.The weight of the locking block 2 in curve L is 2.0g.
Known as shown in Figure 5: in the locking block of the present embodiment utilizing the pressure processing of sheet material to make, it is the thrust that vibration is less than solid locking block, the trackability of high-frequency vibration is good.
[the second embodiment]
Fig. 7 and Fig. 8 illustrates second embodiment of the present invention.The stretcher of this embodiment is mounted with to adjust parts 14 relative to the stretcher of the first embodiment, and other structures are identical with the first embodiment.
Adjusting parts 14 is the structure with sagging multiple (four) foot 16 of top plate portion 15, top plate portion 15.Middle body at top plate portion 15 is formed with the non-circular handle holes 17 such as hexagonal.Multiple foots 16 are sagging from the quartering position of the circumference of top plate portion 15, as shown in Figure 8, are formed with the claw 18 bent to the inside in the bottom of each foot 16.
It is configured on locking block 2 in the way of foot 16 enters between four locking blocks 2 as it is shown in fig. 7, adjust parts 14.Then, engaged with the ditch portion 3e of the bottom of the supporting surface 3c being formed in propulsive element 3 by claw 18, to prevent from being installed in when coming off on propulsive element 3.Engaged with ditch portion 3e by claw 18, can rotate thus adjusting parts 14, but activity vertically is restricted.Such adjustment parts 14, by being arranged on propulsive element 3, thus allowing moving radially and axial movement of locking block 2, but are restricted relative to the activity of the direction of rotation of the locking block 2 of line orthogonal to the axial direction.Additionally, enter between locking block 2 by foot 16, adjust the movable integration that parts 14 make the direction of rotation of locking block 2.
In such adjustment parts 14, if insert the instruments such as spanner to this handle hole 17 and make adjustment parts 14 rotate, then this locking tooth 21 rotates with the locking tooth 1c of the cartridge 1 locking block 2 engaged and retreats vertically movement in the same direction.Accordingly, propulsive element 3 can be axially moveable.Therefore, it is possible to carry out following operation: make propulsive element 3 retreat and loosen timing chain 230 or before making propulsive element 3 and then when aligning chain 230 give tension force.Accordingly, there is the advantage being easy to maintenance.Other effects are identical with the first embodiment.
[the 3rd embodiment]
Fig. 9～Figure 13 is the 3rd embodiment of the present invention, and Fig. 9～Figure 11 illustrates the stretcher of this embodiment.
As it is shown in figure 9, the stretcher of this embodiment possesses shell 31, multiple (two) locking block 32, the propulsive element 33 of the shaft-like inserted in shell 31 and the keeper 41 being arranged in shell 31.
Shell 31 is formed as the tubular of axial leading section opening, and propulsive element 33 can move back and forth insertion.In order to propulsive element 33 being exerted a force along direction of advance, propelling spring 34 is arranged in shell 31.Propulsive element 33 is formed with flange shape spring load portion 33a at axial mid portion, and the power that propelling spring 34 applies acts on spring load portion 33a.
Outer peripheral face at propulsive element 33 is formed with locking tooth 33c.Locking tooth 33c is formed on the outer peripheral face than spring load portion 33a more front side.It is provided with guide part (the シ ュ portion) 33d abutted with chain guide 240 in the leading section of propulsive element 33, and is axially formed screwed hole 33e in rearward end.
Keeper 41 is formed as the tubular of strip, between the check plate 36 of the front of its spring receiving portion 33a being configured at propulsive element 33 and shell 31.In this embodiment, the shell 31 of tubular and the keeper 41 of tubular are equivalent to the cartridge 1 in the first embodiment and the second embodiment.At the inner surface of keeper 41, it is formed with cone shape supporting surface 42.Supporting surface 42 is formed at 33a side, spring load portion, and it is expanding coniform gradually to the direction of advance of propulsive element 33 that it becomes diameter.By keeping spring 43 to exert a force to move in the direction of advance of propulsive element 33 to keeper 41.
Locking block 32 is arranged at by the state to contact with the supporting surface 42 of keeper 41 and is supported on supporting surface 42 in keeper 41.By by pressing spring 35, locking block 32 is exerted a force on the direction contacted with the supporting surface 42 of keeper 41.Additionally, locking block 32 is formed and the locking tooth 33c of the propulsive element 33 locking tooth 32a engaged.
As shown in figs. 11 and 12, locking block 32 possesses load receiving portion 32b, locking tooth forming portion 32c and connecting portion 32d.Locking tooth forming portion 32c is the tabular of two row, and the front end face at each locking tooth forming portion 32c is formed with above-mentioned locking tooth 32a.The locking tooth forming portion 32c of two row is connected to one by connecting portion 32d.Connecting portion 32d connects the back part 32e of locking tooth forming portion 32c.Such locking block 32 can rotate relative to keeper 41, can rotate relative to propulsive element 33 simultaneously.
Load receiving portion 32b is formed as being arranged in the opposition side of the back part 32e of locking tooth forming portion 32c.Thus, so that load receiving portion 32b and connecting portion 32d is arranged on the position being not directly contacted with by the direction different modes that the load of load receiving portion 32b carrying is connected locking tooth forming portion 32c with connecting portion 32d.Accordingly, due in the sagging part of locking block 32, formless restriction, therefore, it is possible to utilize the pressure processing of plate-shaped member to make locking block 32.Now, load receiving portion 32b is formed as having the coniform of the inclination corresponding with the supporting surface 42 of keeper 41.
In such stretcher, make the maintenance bolt 45 of the screwed hole 33e of propulsive element 33 and the rear end side of shell 2 screw togather, make propulsive element 33 be in holding state.In this condition, shell 31 is installed on engine body 200, releases and keep screwing togather between bolt 45 and screwed hole 33e.Accordingly, utilizing propelling spring 34 extrusion propulsive element 33, its guide part 33d abuts with chain guide 240.
In such structure, power that propulsive element 33 applies according to propelling spring 34 and advance.Now, owing to locking block 32 moves up expanding side, locking tooth 32a releases engaging of the locking tooth 33c with propulsive element 33, and therefore propulsive element 33 successfully advances.If propulsive element 33 is acted on overload in the reverse direction, then the power owing to applying by pressing spring 35, load receiving portion 32b moves up along the supporting surface 42 of keeper 41 at necking square, and locking tooth 32a engages with the locking tooth 33c recommending parts 33.Accordingly, the retrogressing of propulsive element 33 is locked.
At this, owing to locking block 32 can rotate relative to keeper 41 and propulsive element 33, therefore when propulsive element 33 bears the load of since engine, being rotated by locking block 32, propulsive element 33 retreats.Therefore, even if raising at engine temperature, timing chain 230 situation about tightening, it is also possible to carry out preventing overload.
As it has been described above, by utilizing the pressure processing of plate-shaped member to shape locking block 32 such that it is able to make locking block 32 lightweight.By making locking block 32 lightweight, it is possible to increase correspondence carrys out the trackability of the vibration of since engine high frequency.Then, the trackability of the vibration of since engine high frequency is carried out by correspondence, it is also possible to reduce the load by pressing spring 35 being pressed against on keeper 41 by locking block 32.
Figure 14 illustrates load receiving portion 32b and the locking block 420 with the connecting portion 32d structure being directly connected to.That is, load receiving portion 32b and connecting portion 32d is directly connected to by being connected setting unit 421.In the locking block 420 of Figure 14, it is enclosed in the inner side of locking tooth forming portion 32c owing to connecting setting unit 421, therefore becomes embossed shape, pressure processing difficulty.On the other hand, when drawing processes the locking block 420 of Figure 14, due to the complicated traction of material, locking tooth 32a deforms.Therefore, the engagement of propulsive element 33 and locking tooth 33c becomes difficulty.Q illustrates the direction of traction in fig. 14.
For the locking block 420 of Figure 14, the locking block 32 of this embodiment is not directly contacted with due to load receiving portion 32b and connecting portion 32d, and therefore pressure processing is easy.Figure 13 illustrates this pressure processing, presses punching press raw sheet by utilizing a pair by compression mould 51 such that it is able to do not make the depression distribution Radix Rehmanniae make locking block 32.
Figure 15～Figure 19 is shown respectively other examples of the locking block that can be used in the stretcher shown in Fig. 9.In the locking block 61 of Figure 15, connecting portion 32d connects the upper surface of locking tooth forming portion 32c.In this shape, due to part of not sinking, it is possible to carry out pressure processing, plate-shaped member can be used as material, hereby it is possible to lightweight, and the function of stretcher can be improved.
The locking tooth 32a of the locking block 62 of Figure 16 offsets tooth pitch (pitch) α and is formed.This locking block 62 can be suitable as the situation of screw thread that the engagement locking tooth 21 of the other side, 33c have the phase place of circumferencial direction, and tooth pitch α is set to offset the phase mass of the locking tooth being equivalent to opponent side.
The locking block 63 of Figure 17 is all formed with a locking tooth 32a at each locking tooth forming portion 32c.The locking block 64 of Figure 18 is that locking tooth 32a only tilts β and formed, and it can with the threaded engagement of screw thread.The locking block 65 of Figure 19 is provided with four row locking tooth forming portion 32c.The above shape of locking tooth 32a, the number of teeth, denture can suitably change.
[the 4th embodiment]
Figure 20 illustrates the 4th embodiment of the present invention.The stretcher of this embodiment is the structure that oil pressure source 70 is connected with the stretcher of the first embodiment, and the oil pressure 71 of oil pressure source 70 acts on the direction of advance of propulsive element 3.
As shown in figure 20, cartridge 1 both ends opening, seal member 12 is installed between inner surface and the propulsive element 3 of front, be fitted together at the inner surface of rear end side has blind cover 73 simultaneously.Rear end side at cartridge 1 offers oil pressure communication port 74, from the inside being arranged at the oil pressure 71 of oil pressure source 70 of engine body 200 side and being filled into from oil pressure communication port 74 cartridge 1.
Seal member 12, while the oil pressure sealed in cartridge 1, carries out the anticreep of propulsive element 3.Thus, if propulsive element 3 moves on, then the locking tooth 21 passing through to be arranged on the locking block 2 of the supporting surface 3c of propulsive element 3 props up seal member 12, thus preventing the advance of propulsive element 3.
Fixed based on bolt by U-shaped folder 77 cartridge 1 is arranged in the shallow concave mounting groove 202 that engine body 200 wears with the lower outer surface in rearward end.Now, the seal member 79 of the surrounding by being inlaid in oil pressure communication port 75 is configured to relative and consistent with the oil pressure communication port 75 of oil pressure source 70 connection being arranged on engine body 200 side and the oil pressure communication port 74 of cartridge 1.
U-shaped folder 13 has the cartridge 1 of load of belt or the chain guide 240 stoping carrying to abut from propulsive element 3 and slides and the function that retreats.
It addition, at the inwall 201 of engine body 200, it is provided with the flange part 3d of propulsive element 3 and relative to the withdrawing portion (escaping げ portion) 203 of belt or chain guide 240 along the direction of propulsion of propulsive element 3 with being connected with mounting groove 202.
Even if in this embodiment, being identically formed locking block 2 with the first embodiment.Accordingly, there is the effect same with the first embodiment.On this basis, owing to passing through to make the direction of propulsion effect of the oil pressure 71 propulsive element 3 along cartridge 1, the propulsive force of propulsive element 3 improves, and sets, therefore, it is possible to use correspondingly, the small-sized propelling spring 4 that compression stress is relatively low.Additionally, due to oil pressure oil has viscosity, so the action of the movable member of propulsive element 3 and locking block 2 etc. is applied to utilize damping and the lubricant effect of the viscous drag of oil pressure oil.Therefore, by improving the effect of amplitude when stably suppressing propulsive element 3 to retreat, suppress the abrasion of these movable members can improve durability simultaneously.The stretcher of such embodiment has suitable in from comparing the design freedom that the put-put of light load operation obtains to the medium duty engine of load operation carrying out.
In the present invention, as the locking tooth 33c of the propulsive element 3 in the locking tooth 1c of the cartridge 1 in the first embodiment, the second embodiment, the 4th embodiment and locking tooth the 21, the 3rd embodiment of locking block 21 that engages and the locking tooth 32a of locking block 32,61,62,63,64,65 that engages, it is possible to the flat tooth using axial tooth pitch to be zero or the screw-like tooth with tooth pitch.When flat tooth, it is possible to keep intensity, in screw-like tooth situation, it can be ensured that intensity and the engagement of nipping being well on.Additionally, can be one or more than three relative to the number of the locking block 2,32,61,62,63,64,65 of cartridge and propulsive element.
Symbol description
1 cartridge 1c, 22 locking tooths
2,32,61,62,63,64,65 locking block
3,33 propulsive element 3c supporting surface
4,34 propelling springs 5,35 press pressing spring
14 adjust parts 22 load receiving portion
23 locking tooth forming portion 24 connecting portions
Claims (6)
1. a stretcher, described stretcher includes: propulsive element, movement of retreating vertically in the inside of cartridge；Propelling spring, exerts a force so that it moves in direction of advance to described propulsive element；Locking tooth, is formed at the inner surface of described cartridge or the outer surface of described propulsive element；And locking block, it is formed with the locking tooth engaged with described locking tooth, the locking tooth of described locking block is configured between described cartridge and propulsive element when engaging with the locking tooth of the locking tooth or propulsive element of described cartridge to lock propulsive element in direction of retreat, described stretcher is characterised by
Described locking block includes: load receiving portion, bears load when described propulsive element retreats；The locking tooth forming portion that two row are above, is formed with the locking tooth of described locking block；And connecting portion, integrally connecting described locking tooth forming portion, described locking block can rotate relative to described cartridge and propulsive element.
2. stretcher according to claim 1, it is characterised in that
In the way of making the closure that load direction that described load receiving portion bears and described connecting portion connect described locking tooth forming portion become different directions, described load receiving portion and connecting portion are arranged at the position being not directly contacted with.
3. stretcher according to claim 1, it is characterised in that
Described load receiving portion be along the direction of propulsion of described propulsive element tilt coniform, be formed with the cone shape supporting surface contacted with described load receiving portion at described propulsive element or cartridge.
4. stretcher according to claim 1, it is characterised in that
Adjusting parts and be arranged on the inside of described cartridge in revolvable mode, described adjustment parts can allow the movement to the direction of propulsion of described propulsive element of the described locking block and the movement to the radial direction intersected with described direction of propulsion.
5. stretcher according to claim 1, it is characterised in that
Described locking block is shaped by the pressure processing to plate-shaped member.
6. stretcher according to claim 1, it is characterised in that
Described stretcher is additionally provided with the oil pressure source making oil pressure effect, and described oil pressure makes described propulsive element advance.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2011/062634 WO2012164707A1 (en) | 2011-06-01 | 2011-06-01 | Tensioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103562595A CN103562595A (en) | 2014-02-05 |
| CN103562595B true CN103562595B (en) | 2016-07-06 |
Family
ID=47258592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180071300.3A Expired - Fee Related CN103562595B (en) | 2011-06-01 | 2011-06-01 | Stretcher |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103562595B (en) |
| WO (1) | WO2012164707A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016021567A1 (en) * | 2014-08-08 | 2016-02-11 | 日本発條株式会社 | Load application device |
| CN108644328A (en) * | 2018-05-28 | 2018-10-12 | 重庆隆鑫发动机有限公司 | Timing tensioning apparatus and engine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08152051A (en) * | 1994-09-26 | 1996-06-11 | Nhk Spring Co Ltd | Driving force imparting device |
| CN1205060A (en) * | 1995-12-21 | 1999-01-13 | 本田技研工业株式会社 | Propelling force application apparatus |
| JP2004190842A (en) * | 2002-12-13 | 2004-07-08 | Tsubakimoto Chain Co | Chain take-up device |
| CN101278143A (en) * | 2005-09-30 | 2008-10-01 | 日本发条株式会社 | Tensioner |
| WO2010038620A1 (en) * | 2008-10-01 | 2010-04-08 | 日本発條株式会社 | Tensioner |
| JP2010084878A (en) * | 2008-10-01 | 2010-04-15 | Nhk Spring Co Ltd | Tensioner |
-
2011
- 2011-06-01 CN CN201180071300.3A patent/CN103562595B/en not_active Expired - Fee Related
- 2011-06-01 WO PCT/JP2011/062634 patent/WO2012164707A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08152051A (en) * | 1994-09-26 | 1996-06-11 | Nhk Spring Co Ltd | Driving force imparting device |
| CN1205060A (en) * | 1995-12-21 | 1999-01-13 | 本田技研工业株式会社 | Propelling force application apparatus |
| JP2004190842A (en) * | 2002-12-13 | 2004-07-08 | Tsubakimoto Chain Co | Chain take-up device |
| CN101278143A (en) * | 2005-09-30 | 2008-10-01 | 日本发条株式会社 | Tensioner |
| WO2010038620A1 (en) * | 2008-10-01 | 2010-04-08 | 日本発條株式会社 | Tensioner |
| JP2010084878A (en) * | 2008-10-01 | 2010-04-15 | Nhk Spring Co Ltd | Tensioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103562595A (en) | 2014-02-05 |
| WO2012164707A1 (en) | 2012-12-06 |
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