CN106415067B - Stretcher - Google Patents
Stretcher Download PDFInfo
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- CN106415067B CN106415067B CN201580026792.2A CN201580026792A CN106415067B CN 106415067 B CN106415067 B CN 106415067B CN 201580026792 A CN201580026792 A CN 201580026792A CN 106415067 B CN106415067 B CN 106415067B
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- Prior art keywords
- shaft component
- wind spring
- leader
- hook portion
- component
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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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
- Springs (AREA)
- Tension Adjustment In Filamentary Materials (AREA)
Abstract
Provided is a kind of stretcher, due to being disposed concentrically upon for building block and can it is more compact, and can prevent on wind spring roll up during fluctuation and torsion.The cylindrical guide portion (13) of the rotation of restricted second shaft component (4) is formed on bearing (6)；Spring locking seam (18) is formed on leader (13)；It rotates and pushes the hook portion (5c) of the other side of the wind spring (5) of the first shaft component (3) to lock seam (18) from spring and be pulled to outside, and be movably locked in leader (13).During being rolled up on wind spring (5), even if the quantity of coil section (5a) coil increases, since the hook portion (5c) of the other side is mobile along leader (13) according to the increase, so also there is no fluctuations and torsion in coil section (5a).
Description
Technical field
The present invention relates to a kind of of the main body (hereinafter referred to " engine main body ") of engine to be attached to automobile
Tight device, the timing chain or timing belt tension being applied in engine main body.
Background technique
The stretcher of timing chain or timing belt that tension is applied in engine main body is attached at the outer of engine main body
On surface.The rotary force that stretcher is used to push timing chain or timing belt by using spring will generate from the torque of spring
It is converted into driving force.Therefore, stretcher includes (1) first shaft component and the second shaft component threadedly engaged with one another；(2) bias
At the spring for rotating the first shaft component, such as wind spring or disc spring；(3) rotation of the second shaft component is limited and by the second axis structure
The rotary force of part is converted into the bearing of driving force；(4) the above-mentioned component of receiving and the shell for the outer surface for being attached to engine main body；
And the gasket that (5) prevent the first shaft component and the second shaft component from skidding off from shell.
In addition, in order to make the stretcher suitable for that, with purpose used in two-wheeled vehicle, can reduce in compact vehicle
The size of stretcher.This reduction size is preferably, this is because it ensures the advance of the second shaft component to push timing chain
Or the stroke of timing belt will not reduce, so that it is guaranteed that keeping the tension on timing chain or timing belt.
Therefore, in the conventional technology, by the first shaft component it is external place a gasket and with the first axle
The second shaft component that component is threadedly engaged it is external place another gasket, this gasket it is external place wind spring (we by this
Kind structure is called " this component "), and this component is contained in shell (see patent document 1), there is stretcher in diameter
To on direction from its Inside To Outside it is concentric and four part-structures.Not needing using this concentric and four part-structures
It is placed on the structure on the longitudinal direction of stretcher using by component, and is thus allowed while ensuring the stroke of the second shaft component
Reduce size.
Listed bibliography
Patent document
Patent document 1
Publication date is the Japan Patent of " on May 18th, 1989 " and Publication No. " Japanese Laid-Open Patent Publication 01-126461 "
Summary of the invention
The present invention will solve the problems, such as
The traditional stretcher for reducing size due to four part-structures has a structure in which, wherein the side of wind spring
On hook portion be locked on the joint close of the first shaft component, and the hook portion on the other side of wind spring is locked in the slot of shell
In portion.In this configuration, if winding wind spring by making the rotation of the first shaft component, the number of turns of the coil section of wind spring increases
Add, and coil section extends, the latched position of the hook portion on the other side is caused to change along the axial direction of coil section.So
And because the hook portion on the other side is locked in the groove portion of shell and generates torque, displacement in the axial direction
Freedom degree reduces, this can apply excessive power from the hook portion on the other side on coil section.Accordingly, it is possible to coil section occur
Waviness and winding, this meeting is so that it can not steadily wind wind spring.
Above-mentioned condition is explained with reference to the stretcher of four part-structure shown in figure 15.Stretcher in Figure 15 is manufactured
At the component of four part-structures comprising: a pair of of the shaft component being made of the first shaft component and the second shaft component, this pair of of axis structure
Part is threadedly engaged with one another on threaded portion；Cylindrical spacer, the gasket is around the outside of this pair of of shaft component；And wind spring,
The wind spring surrounds the outside of gasket.In this component, while the coil section of wind spring surrounds the outside of cylindrical spacer,
The hook portion of the side of wind spring is locked on the joint close of bottom end (lower end) of the first shaft component, and the hook portion of the other side is locked
It is scheduled on shell.Second is limited by the way that the component of this four part-structure is integrated in shell and is fixed at top (upper end)
The bearing of the rotation of shaft component, to assemble stretcher.By making the rotation of the first shaft component (wherein engaging axis to be inserted into joint close)
To wind wind spring, the torque that generation rotates the first shaft component.
If shortening the overall length of above-mentioned stretcher to reduce its size, the overall length of wind spring must be shortened.Therefore, wind spring
The number of turns of coil section reduces.If the number of turns of the coil section of wind spring reduces, the wind spring in the first free state it is straight
Difference between diameter and the diameter of the coil section when it is set as stretcher and wind spring is wound increases.It is this variation due to
Lower true and become more prominent: stretcher is smaller, then the number of turns of wind spring is fewer；In the internal diameter and wind spring of the coil section of wind spring
Difference between the diameter of gasket becomes much larger.In this case, if wind spring is wound, be likely to occur wind spring waviness and
Winding, this is because for the hook portion of the other side, in the axial direction with the displacement freedom of very little.
The above problem is already have accounted for when generating the present invention, the present invention is intended to provide a kind of stretcher, allows to pass through
Arranged concentric component reduces size, and its winding be biased so that first axle component rotation wind spring when can prevent
Above-mentioned waviness and winding.
Solution to the problem
The feature of this stretcher is as described below.It has four part-structures, comprising: by the first shaft component and the second shaft component
A pair of of shaft component of composition, this pair of of shaft component are threadedly engaged with one another on threaded portion and for so that passing through the first axle
The rotation of component drives second shaft component；Cylindrical gasket, the gasket are placed such that gasket is a pair of around this
The outside of shaft component；Wind spring, the coil section of the wind spring are placed such that the coil section surrounds the outside of the gasket, and
And spring can be wound to carry out bias, so that first shaft component rotates；And bearing, the bearing are fixed to plate
The installation component of shape is simultaneously placed such that the bearing around the wind spring.The bearing includes: fixed part, which passes through
Fixed part is fixed to the installation component；Leader, the leader on the direction that second shaft component advances from
The fixed part is at cylindrically extending, and the leader surrounds the outside of the wind spring；And hole, the hole are formed in
The top end of leader, and the second shaft component passes through the hole and with the sliding of the state of limited swivel.The wind spring has one
Hook portion on end, the hook portion are locked in the hook portion on first shaft component and on the other end, and the hook portion is locked
On the bearing and it is biased so that first shaft component rotates.It is formed on the leader in the pair of axis
The spring locking seam extended on the axial direction of component, also, the hook portion on the other end of the wind spring is from the spring
Locking seam withdraws and is locked on leader outward, enables the hook portion on the other end in the longitudinal direction side of leader
It moves up, is increasedd or decreased with matching any of coiling the number of turns of the wind spring.
It is formed with recess in the present invention, it is preferred to sew in spring locking, the hook portion of the other side of the wind spring
It is engaged into the recess and with the recess.The recess be preferably directed towards the direction that second shaft component advances be gradually increased for
Taperer.Moreover, the hook portion that the recess is preferably formed in the other side reaches the position of the coil end of the wind spring,
And the recess preferably linearly extends in the circumferential direction of the wind spring.
Advantageous effects of the invention
In the present invention, cylindrical guide portion is formed on the bearing of rotation for limiting the second shaft component, and
It is formed with spring locking seam on this leader, also, is biased on the other side for the wind spring for rotating the first shaft component
Hook portion withdraws outward from spring locking seam and is locked on leader.Due to this construction, the hook portion of the other side can draw
It leads and is moved on the longitudinal direction of part, increasedd or decreased with matching any of coiling the number of turns of wind spring；Even if the circle of coil section
Number increaseds or decreases while wind spring is wound, and the hook portion of the other side can still be moved along leader, keep up with this increase
Or reduce.Therefore, while wind spring is wound, be not in excessive stress on coil section, lead to coil section not
There are waviness and winding.Therefore, wind spring can steadily be wound.
Detailed description of the invention
Fig. 1 is the longitdinal cross-section diagram of the stretcher of the embodiment of the present invention 1.
Fig. 2 is the plan view of embodiment 1.
Fig. 3 (a) is the plan view of wind spring, and Fig. 3 (b) is the front view of wind spring.
It is the longitdinal cross-section diagram of bearing that Fig. 4 (a), which is the plan view of bearing, Fig. 4 (b), and Fig. 4 (c) is the bottom view of bearing.
Fig. 5 is the front view of stretcher, and it illustrates the stretchers before wind spring is wound.
Fig. 6 is the plan view of stretcher shown in fig. 5.
Fig. 7 is the front view of the stretcher after wind spring has been wound.
Fig. 8 is the plan view of stretcher shown in Fig. 7.
Fig. 9 is the front view of the stretcher of the embodiment 2 before wind spring is wound.
Figure 10 is the plan view of stretcher shown in Fig. 9.
Figure 11 is the front view of the stretcher of the embodiment 2 after wind spring has been wound.
Figure 12 is the plan view of stretcher shown in Figure 11.
Figure 13 is the front view of the stretcher of the embodiment 3 after wind spring has been wound.
Figure 14 is the plan view of stretcher shown in Figure 13.
Figure 15 is the sectional view for reducing the stretcher of the conventional construction of size due to four part-structures.
Specific embodiment
Hereinafter, according to showing that the embodiment of the present invention is specifically explained the present invention.In these embodiments
In description, identical component is indicated by identical alphanumeric character, to ensure that it corresponds to each other.
Embodiment 1
Fig. 1 to Fig. 8 shows the stretcher 1 of the embodiment of the present invention 1.Fig. 1 is the longitudinal cross-section of stretcher 1 on the whole
Figure, Fig. 2 is the plan view of stretcher 1.Fig. 3 shows wind spring, and Fig. 4 shows bearing, and Fig. 5 to Fig. 8 shows the behaviour of stretcher
Make state.
As depicted in figs. 1 and 2, stretcher 1 is equipped with installation component 2, a pair of of shaft component 3 and 4, wind spring 5, bearing 6 and pad
Piece 7.
Installation component 2 is formed as the slab for being attached to engine main body, and the diagram of engine main body is omitted.In order to enable
Installation component 2 can be attached to engine main body, and installation component 2 has multiple mounting hole 2a, these mounting holes pass through the depth of plate
Direction, so that bolt (not shown) may pass through mounting hole 2a (see Fig. 2).In Fig. 2,2b is that the contact on installation component 2 is started
The surface in the outside of owner's body, and be inserted into bolt when outside of the stretcher 1 by contacting engine main body as mounting surface 2b
Mounting hole 2a (then, these bolts are screwed into engine main body) and be attached to engine main body.Bearing 6 is fixed to installation
Component 2.For this purpose, on the depth direction of installation component 2, it is formed on installation component 2 from recessed more of mounting surface 2b
A fixing groove 2c.As shown in Fig. 2, each fixing groove 2c is formed about round arc when in plan view, also,
The fixing piece 16 described below bearing 6 will be inserted into these mounting grooves 2c with pressure.
This pair of of shaft component 3 and 4 includes the first shaft component 3 and the second shaft component 4 threadedly engaged with one another；First shaft component
It is configured such that the second shaft component 4 advances in engine main body due to the rotation of the first shaft component 3 with the second shaft component.
As shown in Figure 1, axle portion 3a is located on the side (bottom end side) of the installation component 2 of the first shaft component 3, and in axial direction
The threaded portion 3b extended on direction from axle portion 3a is integral, and is formed with external screw thread on the outer circumference of threaded portion 3b
Part 8.The rotation of the bottom end of axle portion 3a is supported, wherein the containing seat in installation component 2 is inserted into the bottom end contact with pressure
19.On the bottom end surface of axle portion 3a, it is formed with joint close (seaming slit) 3c, joining jig 20 is inserted into joint close 3c
So that the first shaft component 3 rotates.By by joining jig 20 be inserted into joint close 3c in and rotate the first shaft component 3, behind retouch
The wind spring 5 stated can be wound.After this winding, by the way that sealing-plug 21 is cooperated to connecing on the outside of joint close 3c
It closes in hole and blocks the hole.
Second shaft component 4 is formed cylinder, and is formed with female thread portion on the inner surface of the second shaft component 4
9, and the female thread portion is engaged with the male thread portion 8 of the first shaft component 3.Rotation of second shaft component 4 due to the first shaft component 3
Then advance in engine main body, and the second shaft component 4 pushes the timing chain or timing belt in engine main body, and leads to
It crosses to do so and tension is applied to it.The top of this second shaft component 4 is covered by lid 10.
Wind spring 5 includes: coil section 5a, and the axial direction along this pair of of shaft component 3 and 4 threadedly engaged with one another prolongs
It stretches；And side hook portion 5b and the other side hook portion 5c, positioned at coil section 5a both ends on (see Fig. 3).Such as Fig. 3 institute
Show, the hook portion 5b of side curves inwardly on coil section 5a, is inserted into and is then locked into positioned at the bottom of the first shaft component 3
In joint close 3c on end surfaces.The hook portion 5c of the other side is bent outwardly on coil section 5a, and it is locked in bearing 6
On, as described in below.In this configuration, it can apply and turn round by due to winding wind spring 5 and rotating the first shaft component 3
Square, to make 5 bias of wind spring, rotate the first shaft component 3 by this torque.
The bearing 6 for limiting the rotation of the second shaft component 4 includes leader 13, fixed part 14 and hole 15, such as Fig. 1 and figure
Shown in 4.Fixed part 14 is fixed to installation component 2, and leader 13 on the direction that the second shaft component 4 advances from this
A fixed part 14 is at cylindrically extending.Therefore, leader 13 be in its from the mounting surface 2b of installation component 2 upwards and to
In the state of preceding extension (upside in Fig. 1).The elongated end part of leader 13 is formed in aduncate in the radial direction
Bending part 13a, and hole 15 is formed on the 13a of this bending part.
Second shaft component 4 passes through hole 15 while free to slide.The inside in hole 15 can have elliptical shape, be cut into
So that shape, rectangular shape or another non-circular shape that two pairs of opposite sides of the shape are parallel to each other.Second shaft component 4
Outside may be alternatively formed to non-circular shape corresponding with hole 15, allow bearing 6 to limit the rotation of the second shaft component 4.At this
In kind of construction, when the first shaft component 3 is rotated due to the torque of wind spring 5, the second axis structure for being threadedly engaged with the first shaft component 3
Part 4 linearly advances in the axial direction without rotating, and applies tension on timing chain or timing belt.
Fixed part 14 with the bottom end of leader 13 substantially orthogonal to direction on be in bending state guidance
Part 13 connects.In this embodiment, fixed part 14 is by curved more from the bottom end of leader 13 in radial directions
A (4) fixing piece 16 formation.Each fixing piece 16 is bent outwardly by radial directions from the bottom end of leader 13 curved
The folded portion 16b shape that bent portions 16a and the direction upwardly extended from the end of bending part 16a towards leader 13 fold
At.Folded portion 16b is formed approximate circular arc, dimensionally corresponds to the fixing groove 2c (see Fig. 2) of installation component 2, and
And since folded portion 16b to be inserted into the fixing groove 2c of installation component 2 with pressure, by being upwardly extended from installation component 2
Bearing 6 be fixed to installation component 2.Moreover, by the way that installation component 2 is fixed to engine main body to cause mounting surface 2b to contact
The outer surface of engine main body, fixing piece 16 can be grasped between installation component 2 and the outer surface of engine main body, this makes
Bearing 6 can be firmly fixed, and stretcher 1 is enabled to be stably attached to engine main body.
Spring locking seam 18 is formed on bearing 6.As shown in figure 4, spring locking seam 18 is by along leader 13
Longitudinal direction side partly the leader 13 of intaglio bearing 6 and formed.Therefore, spring locking seam 18 is with identical as leader 13
Mode upwardly extended in the side that the second shaft component 4 advances.In this embodiment, 18 strokes of spring locking seam are in leader
At two points to each other on 13；However, it is acceptable to these point quantity be one or three or more.Such as
Shown in Fig. 1, spring locking seam 18 passes through spring for the hook portion 5c of the other side of wind spring 5 to be retracted to the outside of bearing 6
The hook portion 5c for the other side that locking seam 18 is withdrawn is locked on leader 13.
Gasket 7 is formed to be cylindrical, and its lower end is formed in the diameter of gasket 7 on the longitudinal direction of gasket 7
The aduncate bending part 7a on direction, also, the upper end be formed in a longitudinal direction gasket 7 in the radial direction to
The bending part 7b of outside sweep.The part 7a that curves inwardly contacts the bottom end surface of the second shaft component 4, and is bent outwardly part 7b
Bending part 13a on the leader 13 of contact bearing 6.Due to this construction, gasket 7 prevents this to shaft component 3 and 4 from axis
6 are held to skid off.
In this embodiment, due to being inserted into this in gasket 7 threadedly engaged with one another to shaft component 3 and 4, so gasket
7 are placed with and make it around this outside to shaft component 3 and 4.Wind spring 5 is placed with the outside for making it surround this gasket 7, and
And the hook portion 5b of the side of wind spring 5 is inserted into and then is locked in the joint close 3c of the first shaft component 3.Then, the second shaft component 4
It is inserted into the slide opening 15 of bearing 6, and threadedly engaged with one another this is attached to bearing 6 to shaft component 3 and 4.At this point, wind spring 5
The hook portion 5b of side the outside of bearing 6 18 is retracted to by spring locking seam, and be locked in the leader 13 of bearing 6
On, this construction is manufactured into component.After this, bearing 6 is by being inserted into installation structure for the fixing piece 16 of bearing 6 pressure
It is fixed to installation component 2 in each fixing groove 2c of part 2, and installation component 2 is attached to engine main body with by this structure
Manufacture is made into stretcher 1.
In such configuration, this threadedly engaged with one another is surrounded the outside of shaft component 3 and 4 by gasket 7, outside gasket 7
Side is surrounded by wind spring 5, and the outside of wind spring 5 is surrounded by bearing 6, this is a kind of four part-structures.Due to this construction, tensioning
The length of device can be shortened.Moreover, drawing because the rear end of the second shaft component 4 can move in the leader 13 of bearing 6
The inside for leading part 13 can be used as the effective travel of the second shaft component 4.Therefore, it even if the length of stretcher shortens, still can ensure that
Enough strokes of second shaft component 4, this causes good tension to be applied to the timing chain in engine main body or timing.
Moreover, because this embodiment is configured such that spring locking seam 18 is formed in the leader 13 of bearing 6
On longitudinal direction, and makes the hook portion 5c of the other side of wind spring 5 withdraw and be then locked by spring locking seam 18 and draw
It leads on part 13, the hook portion 5c of the other side can be moved up in the longitudinal direction (longitudinal direction of spring locking seam 18) of leader 13
It is dynamic, to be wound respectively or matching any of coil diameter associated with the number of turns is wound increaseds or decreases when unwinding when wind spring 5,
And when wind spring 5 is wound, the hook portion 5c of the other side can be mobile towards the front side of leader 13.Fig. 5 to Fig. 8 is shown separately
The state that the hook portion 5c of side has been retracted.
Fig. 5 and Fig. 6 shows before wind spring 5 is wound and has advanced it towards front side from bearing 6 in the second shaft component 4
Preceding state.At this point, as shown in figure 5, the diameter of the gasket 7 of wind spring 5 increases and its length reduces, and the other side of wind spring 5
Hook portion 5c be positioned approximately in bearing 6 leader 13 longitudinally middle position, and be then locked into leader 13
On.Fig. 7 and Fig. 8, which is shown, makes the rotation of the first shaft component 3 by using joining jig 20 to wind the state of wind spring 5.Due to
The winding of wind spring 5, so the number of turns of coil section 5a increases, meanwhile, the coil diameter of coil section 5a reduces and coil section
5a extends.At this point, because the hook portion 5c of the other side of wind spring 5 becomes able to move on the longitudinal direction of leader 13, institute
It can be moved forward along leader 13 with the hook portion 5c of the other side, match the increase of the number of turns of coil section 5a.Therefore, it is rolling up
Be not in excessive stress on coil section 5a while spring is wound, lead to coil section 5a there is no waviness or twine
Around.Therefore, wind spring 5 can steadily be wound.In addition, when the second shaft component 4 advances in engine main body, the circle of wind spring 5
Number reduces and coil diameter increases；During this diameter of wind spring 5 is increased, the hook portion 5c of the other side is along leader
13 move backward.Therefore, the second shaft component 4 can smoothly advance.
Embodiment 2
Fig. 9 to Figure 12 shows stretcher 1A, is the embodiment of the present invention 2；Fig. 9 and Figure 10 shows wind spring 5 and is rolled up
Around state before, Figure 11 and Figure 12 show the state after wind spring 5 has been wound.
Stretcher 1A has structure identical with the stretcher 1 of embodiment 1, in addition to the shape on the leader 13 of bearing 6
Other than recess 31.
In a manner of identical with the stretcher 1 of embodiment 1, bearing 6 is installed by being inserted into multiple fixing pieces 16 with pressure
Installation component 2 is fixed in the fixing groove 2c of component 2.Due to being fixed to installation component 2, so the leader 13 of bearing 6
It upwardly extends from installation component 2, is upwardly extended in the side that the second shaft component 4 advances.It is threadedly engaged with one another in leader 13
This to shaft component 3 and 4, gasket 7 and wind spring 5 from Inside To Outside in the radial direction by this sequence place.
Spring locking seam 18 is formed on leader 13, to extend along this to the axial direction of shaft component 3 and 4, and
And the hook portion 5c of the other side of wind spring 5 is retracted to outside by spring locking seam 18, and is then locked into leader
On 13.In this embodiment, recess 31 is formed on spring locking seam 18.Recess 31 is the hook portion of the other side of wind spring 5
The recess that 5c is contacted and engaged.Recess 31 is formed to cross spring from middle section on the longitudinal direction of leader 13
Locking seam 18 extends to its top (part that the hook portion 5c of the other side reaches the end of the coil of wind spring 5).
In this embodiment, recess 31 is gradually increased on the direction that the second shaft component 4 advances as taperer.This meaning
Recess 31 be formed on leader 13 with towards the second shaft component 4 advance direction with the angle tilt of α.The angle quilt of α
It is set as about in 0 degree to 30 degree of approximate range, this depends on the coil diameter of wind spring 5.This conical depression 31 is used as
Guiding surface, passes through that spring locking seam 18 is withdrawn and the hook portion 5c of the other side of wind spring 5 that is locked on leader 13 is in quilt
Engage times for increaseing or decreasing associated coil diameter respectively with the matching when wind spring 5 is wound or unwinding and coiling the number of turns
It is slided on the guiding surface while what is increasedd or decreased.
Fig. 9 and Figure 10 is shown before wind spring 5 is wound and the second shaft component 4 advances from bearing 6 towards front side
State.At this point, as shown in figure 5, the diameter of the coil section 5a of wind spring 5 increases and its length reduces, and the other side of wind spring 5
The hook portion 5c leader 13 that is positioned in bearing 6 longitudinally middle position in and be locked on leader 13.Figure 11
The state that wind spring 5 has been wound is shown with Figure 12.Due to the winding of wind spring 5, so the number of turns of coil section 5a increases, simultaneously
The coil diameter of coil section 5a reduces and coil section 5a extends.When coiling the number of turns of this coil section 5a increases, separately
The hook portion 5c of side slides through conical depression 31, and moves and reach the end of coil towards front side along leader 13.
That is, hook portion 5c increaseing or decreasing for coil diameter according to caused by the winding as wind spring 5 of the other side and it is mobile logical
Cross conical depression 31.Due to this move mode of the hook portion 5c of the other side, so in coiled portion while wind spring 5 is wound
Dividing on 5a is not in excessive stress, this causes on coil section 5a, and there is no waviness or windings.Therefore, wind spring 5 can
Steadily wound.In addition, coiling the number of turns of wind spring 5 reduces and coils when the second shaft component 4 advances in engine main body
Diameter increases；During this diameter of wind spring 5 is increased, the second shaft component 4 can smoothly advance, this is because the other side
Hook portion 5c moved along conical depression 31 towards rear portion.
Embodiment 3
Figure 13 and Figure 14 shows stretcher 1B, is the embodiment of the present invention 3, and shows wind spring 5 and be wound
State.
For the stretcher 1B of this embodiment, spring locking seam 18 is formed on the leader 13 of bearing 6, and
And recess 33 is formed on spring locking seam 18.In addition to this, the construction of this embodiment is identical as the construction of embodiment 1.
The hook portion 5c that recess 33 is formed in the other side is reached at the position of the end of the coil of wind spring 5.Recess 33 is formed in
The end on the longitudinal direction of spring locking seam 18.About this point, recess 33 is linear in the circumferential direction of wind spring 5
Ground extends.In such configuration, before wind spring 5 is wound, dynamic coiled portion is pulled up by the axial direction in coil section 5a
Divide 5a, the hook portion 5c of the other side is locked on recess 33.Due to this locking, the hook portion 5c of the other side is maintained at recess 33
On.If wind spring 5 is wound in such state, the top (upper end) of coil section 5a is extended upwardly near recess 33
One point and in the axial direction correspond to the point.In such configuration, when wind spring 5 is wound coil diameter or length
Variation can be processed, to be not in excessive stress on wind spring 5 while wind spring 5 is wound, cause coiling
Waviness or winding are not present on the 5a of part.Therefore, wind spring 5 can steadily be wound.
The list of reference symbol
1,1A and 1B: stretcher
3. the first shaft component
4. the second shaft component
5. wind spring
5a. coil section
The hook portion of the side 5b.
The hook portion of the other side 5c.
6. bearing
7. gasket
13. leader
14. fixed part
15. slide opening
16. fixing piece
18. spring locking seam
31 and 33: recess
Claims (4)
1. a kind of stretcher of four part-structures, the stretcher includes: a pair of of shaft component, and the pair of shaft component is by first axle
Component and the second shaft component composition, the pair of shaft component is threadedly engaged with one another on threaded portion and is used for so that by described
The rotation of first shaft component drives second shaft component；Cylindrical gasket, the gasket are placed such that the pad
Piece surrounds the outside of the pair of shaft component；Wind spring, the coil section of the wind spring are placed such that the coil section encloses
With the first shaft component described in bias and thus around the outside of the gasket, and the wind spring can be wound, and make the first axle
Component rotation；And bearing, the bearing are fixed to the installation component of plate and are placed such that the bearing around institute
State wind spring；
The bearing includes fixed part, and the bearing is fixed to the installation component by the fixed part；Guide portion
Point, the leader on the direction that second shaft component advances from the fixed part at cylindrically extending, and
The leader surrounds the outside of the wind spring；And hole, the hole are formed in the top end of the leader, and institute
It states the second shaft component and the hole is passed through with the state of limited swivel；
It is characterized in that, the wind spring has a hook portion on the one end being locked on first shaft component, and it is being locked to
On the bearing and the first shaft component described in bias is so as to have a hook portion on the other end of first shaft component rotation；
Wherein, the springlock extended on the axial direction of the part of the pair of shaft component is formed in the leader
Fixed seam,
Wherein, the hook portion on the other end of the wind spring is retracted to the other side and quilt from spring locking seam
It is locked on the leader, enables the hook portion on the other end in the direction of the length of the leader
Upper movement is increasedd or decreased with matching any of wind spring the number of turns.
2. stretcher according to claim 1, wherein it is sewed in spring locking and is formed with recess, the wind spring
The hook portion on the other end is inserted into the recess and engages with the recess.
3. stretcher according to claim 2, wherein the direction that the recess advances along second shaft component is gradually
It is increased to taperer.
4. stretcher according to claim 2, wherein the recess is formed in the making described another of spring locking seam
On the part for the coil end that the hook portion on one end reaches the wind spring, and the recess is in the circumferential direction side of the wind spring
Linearly extend upwards.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014082577 | 2014-04-14 | ||
| JP2014-082577 | 2014-04-14 | ||
| PCT/JP2015/061044 WO2015159782A1 (en) | 2014-04-14 | 2015-04-08 | Tensioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106415067A CN106415067A (en) | 2017-02-15 |
| CN106415067B true CN106415067B (en) | 2018-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201580026792.2A Active CN106415067B (en) | 2014-04-14 | 2015-04-08 | Stretcher |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6431049B2 (en) |
| CN (1) | CN106415067B (en) |
| BR (1) | BR112016024025B1 (en) |
| WO (1) | WO2015159782A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1336499A (en) * | 2000-07-31 | 2002-02-20 | 日本发条株式会社 | Driving device and tension device |
| CN1829871A (en) * | 2003-08-04 | 2006-09-06 | 日本发条株式会社 | Tensioner |
| CN101278143A (en) * | 2005-09-30 | 2008-10-01 | 日本发条株式会社 | Tensioner |
| CN101627227A (en) * | 2007-03-08 | 2010-01-13 | 日本发条株式会社 | Tensioner |
| CN103649591A (en) * | 2011-06-08 | 2014-03-19 | 盖茨公司 | Tensioner |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4355902B2 (en) * | 2003-06-20 | 2009-11-04 | 株式会社ジェイテクト | Auto tensioner |
| US7448974B2 (en) * | 2004-11-05 | 2008-11-11 | Dayco Products, Llc | Belt tensioner and method for making a belt-tensioner arm and a spring case |
-
2015
- 2015-04-08 CN CN201580026792.2A patent/CN106415067B/en active Active
- 2015-04-08 WO PCT/JP2015/061044 patent/WO2015159782A1/en active Application Filing
- 2015-04-08 BR BR112016024025-1A patent/BR112016024025B1/en active IP Right Grant
- 2015-04-08 JP JP2016513739A patent/JP6431049B2/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1336499A (en) * | 2000-07-31 | 2002-02-20 | 日本发条株式会社 | Driving device and tension device |
| CN1829871A (en) * | 2003-08-04 | 2006-09-06 | 日本发条株式会社 | Tensioner |
| CN101278143A (en) * | 2005-09-30 | 2008-10-01 | 日本发条株式会社 | Tensioner |
| CN101627227A (en) * | 2007-03-08 | 2010-01-13 | 日本发条株式会社 | Tensioner |
| CN103649591A (en) * | 2011-06-08 | 2014-03-19 | 盖茨公司 | Tensioner |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2015159782A1 (en) | 2015-10-22 |
| JP6431049B2 (en) | 2018-11-28 |
| CN106415067A (en) | 2017-02-15 |
| JPWO2015159782A1 (en) | 2017-04-13 |
| BR112016024025B1 (en) | 2023-03-28 |
| BR112016024025A2 (en) | 2017-08-15 |
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