CN103671774A

CN103671774A - Tension device for traction member and engine with the traction member and the tension device

Info

Publication number: CN103671774A
Application number: CN201310426328.5A
Authority: CN
Inventors: N.特罗恩奎伊; R.莱斯科雷尔
Original assignee: SKF AB
Current assignee: SKF AB
Priority date: 2012-09-20
Filing date: 2013-09-18
Publication date: 2014-03-26
Also published as: BR102013024098A2; FR2995648A1

Abstract

The invention relates to a tensioning device comprising a mounting plate; a tensioning roller, centered on the roller axis, having a mounting configuration around a pivot axis (offset with respect to the roller axis) and an active configuration (for tensioning positioned on the tensioning roller at least one rotational degree of freedom between the traction members on the plate), movably mounted on the plate; means for locking the tension roller relative to the plate; and anti-return blocking means for preventing the tension roller from returning from the active configuration to the mounted configuration relative to the plate , which is different from the locking device. The anti-return blocking device comprises a convex anti-return element formed by a protrusion belonging to a first member from the plate and the tension roller; a concave anti-return element formed on the outer edge of a second member from the plate and the tension roller A cavity in the peripheral recess is formed; in the active configuration the protrusion is housed in the cavity, the faces facing each other abut each other, the anti-return element cooperates while preventing the tension roller from returning to the installed configuration. The invention also relates to an engine equipped with at least one traction member and one tensioning device.

Description

Tension device and the motor that has traction piece and tension device for traction piece

Technical field

The present invention relates to for example, tension device for driving component (band of the explosive motor of assembly line motor vehicle or chain).The invention still further relates to the motor that is equipped with such tension device.The field of the invention is the field of tension device.

Background technique

Conventionally, such tension device is used to be applied to the constant-tension within the scope of predetermined tension on driving component, and/or for revising partly the traction loop that comprises this member.In the time of in being installed in traction loop, driving component is driven by least one motor apparatus, especially, and by the crank-driven of assembling explosive motor, and the device that drives at least one to connect it and be set up motion, especially compressor or generator.

In fact, driving component is connected to motor apparatus and by the device with wheel drive being arranged on this device.So driving component is due to this tension device by tensioning under the use tension force enough, to avoid any slip of belt wheel, and the running of the optimization in loop is drawn in permission.

US-A-2008/0207367 has described the tension device that comprises lever arm and spring, and it is provided for tensioning haulage gear.Owing to having lever arm and spring, therefore such tension device has very large volume, and is not useable for some application.And, owing to forming a lot of parts of tension device, thus its cost and the installation time relatively high.Finally, spring may relax in time, makes to be thus applied to the tension recovery on driving component by tension device, and causes the running of the bad change in traction loop.

Summary of the invention

The object of the invention is to propose a kind of improved tension device.

For this reason, the present invention relates to a kind of tension device, comprising: mounting plate; Hitch roll, center on roll axis, movably be arranged on described plate, have around pivot axis and be positioned at least one mounting construction of the driving component on hitch roll and at least one rotary freedom between an effect structure, described pivot axis departs from respect to roll axis; Locking device, for being locked in hitch roll the not isostructure of tension device with respect to plate; With the anti-blocking device that returns, stop hitch roll from effect structure, to turn back to mounting construction with respect to described plate, it is described that anti-to return to blocking device different from described locking device.Described tension device is characterised in that, describedly anti-ly returns to blocking device and comprises:

Protruding resisting returned to element, by the projection belonging to from the first member in plate and hitch roll, formed; With

The recessed anti-element that returns, is formed by the chamber being formed in the outer peripheral peripheral recess of second component, and described second component is from described plate and hitch roll;

And it is characterized in that, in effect structure, projection is accommodated in chamber, and the face of wherein facing abuts each other, under the effect of the stress applying at the driving component by hitch roll, the described anti-element that returns coordinates by stoping hitch roll to turn back to mounting construction.

Thereby, the invention enables, can keep with gratifying tension force in time, making driving component stretch by tension device, hitch roll is stopped in place with respect to described plate reliably and securely simultaneously.Be for example applied to tension force on driving component, by existing the existing apparatus (being the device in conjunction with spring or cylinder) of lax in time risk to compare, the anti-blocking device that returns according to the present invention stops hitch roll to leave effect structure.And tension device volume according to the present invention is not very large, is easy to manufacture, and can realizes being arranged on and draw in loop.

Consider alone or in combination according to other favorable characteristics of the present invention:

When at tension device in use time, in the situation that locking device is unlocked, the anti-blocking device that returns automatically stops hitch roll to rotate around pivotal axis in effect structure.

Chamber and peripheral recess are formed in the part of support hitch roll of plate, and the part of the spring bearing of projection and hitch roll is integrated.

Chamber and peripheral recess are formed in the part of hitch roll spring bearing, and the part of the support hitch roll of projection and plate is integrated.

Protrudingly anti-return to element and recessedly anti-ly return to element and be axially formed in the first member and second component respectively about pivot axis.

Protrudingly anti-return to element and recessedly anti-ly return to element and be radially formed in the first member and second component respectively about pivot axis.

In mounting construction, projection is contained in peripheral recess.

Peripheral recess be formed at most plate support hitch roll part girth 1/4th on.

From mounting construction, changing between effect tectonic epochs, locking device is unlocked, and hitch roll and plate are parallel to pivotable axial separation, otherwise projection abuts the face of recess, and, after making the more close plate of hitch roll, in effect structure, anti-return to blocking device and automatically stop hitch roll to turn back to mounting construction, the no matter locked or release of locking device.

The invention still further relates to the motor that is equipped with at least one driving component, it is characterized in that, it is also equipped with at least one tension device as described above.Preferably, the rear plate of tension device is fastened to the wall of described motor.

Accompanying drawing explanation

When below reading, only as non-limiting example, provide and carry out with reference to accompanying drawing description time, the present invention will be understood better, in accompanying drawing:

Fig. 1 be with mounting construction, show according to the front elevation of tension device of the present invention;

Fig. 2 be similar to Fig. 1 demonstration the front elevation of this tension device in effect structure of driving component;

Fig. 3 is the three-dimensional view that shows the tension device in effect structure, for simple and clear object, does not show driving component;

Fig. 4 is that tension device is along the rear view of the arrow IV of Fig. 3;

Fig. 5 is the sectional view along the larger proportion of the V-V line of Fig. 4;

Fig. 6 be similar to Fig. 3 for according to the three-dimensional view of the tension device substantially showing with mounting construction of second embodiment of the invention;

Fig. 7 is the view of the larger proportion of the thin VII of portion in Fig. 6;

Fig. 8 is the view that is similar to the tension device showing with effect structure of Fig. 6;

Fig. 9 is the view showing with effect structure for a third embodiment in accordance with the invention tension device that is similar to Fig. 4.

Embodiment

Tension device 2 is applicable to tensioning driving component 1 in a controlled manner.As a non-limiting example, this driving component 1 can be band or the chain that belongs to the traction loop that is equipped with motor.For the sake of simplicity, only in Fig. 2, partly and schematically shown and be with 1, and do not shown motor and draw other constituent elements in loop, for example with 1 coordinated for transmit the belt wheel of motion in traction loop.

Tension device 2 is included in the rear mounting plate 3 on motor outer wall, and centers on roll axis X4 and be movably arranged on the hitch roll 4 on plate 3." afterwards " limits towards the orientation of the wall orientation of motor, and the orientation of the wall opposed orientation of " front " restriction and motor.When tension device 2 is equipped with motor, rear plate 3 is positioned at the rear portion of tension device 2, and hitch roll 4 is positioned at the front portion of tension device 2.

Especially, hitch roll 4 is movably arranged on plate 3, has around at least one rotary freedom of pivot axis (it is eccentric about roll axis X4), as described later.Due to the motion between rear plate 3 and hitch roll 4, tension device 2 can have not isostructure.More specifically, tension device 2 has at least one mounting construction C1, for plate 3 being arranged on to the wall of motor, and tension band 1 not; And have effect structure C2, for being arranged on by tension force F tensioning, on hitch roll 4, be with 1, described tension force F is radially applied to described being with on 1 with controlled manner about axis X 4.Mounting construction C1 is presented in Fig. 1, and effect structure C2 is presented in Fig. 2 to 5.

Rear plate 3 has the shape of integral elongated between two ends 31 and 32.Plate 3 also comprises supporting part 33, and it is provided for receiving hitch roll 4; And comprise core 34, it is connected to supporting part 33 by two ends 31 and 32.Along the fore-and-aft direction of the X4 that parallels to the axis, core 34 is thinner than

end

31 and 32, and thinner than supporting part 33.

End

31 and 32 is respectively arranged with two through

holes

311 and 321, and these two through holes form along two axle X31 and the X32 of parallel to each other and the X4 that parallels to the axis.These through

holes

311 and 321 are provided for being received in the fastener of the plate 3 on motor outer wall, and therefore receive tension device 2.Cascade housing 312 and 322 forms around opening 311 and 321 respectively on the front side of plate 3, and is formed for the bearing surface of described fastener, and described fastener is not shown for the reason such as simple and clear.Advantageously, hole 311 is oval, so that plate 3 is arranged in engine wall according to the positioning error in this wall, described wall is for receiving hole, and this hole is for the fastener of dash receiver 3.

End

31 and 32 comprises the

protuberance

313 and 323 on the rear side that is formed on plate 3.These

protuberances

313 and 323 arrange has

plane surface

314 and 324, and it bears against the wall of motor perpendicular to axle X31 and X32.For improve plate 3 with and to the mechanical strength of the fixed area of motor,

protuberance

313 and 323 thicker than core 34.

Intensity in order to ensure plate 3 in the optimization at itself and hitch roll 4 lock seaming places, and avoid any friction risk with respect to the hitch roll 4 of plate 3 pivotables, the thickness of supporting part 33 is greater than the thickness of core 34.Thereby supporting part 33 forms protuberance on the front side of plate 3, and arrange and to have plane surface 331, this plane surface 331 is perpendicular to axle X31 and X32, and is orientated on the front side relative with hitch roll 4 of plate 3.And supporting part 33 arranges has through hole 36, this through hole has the axis X 36 that is parallel to axle X4, X31 and X32.This hole 36 is set up to screw thread (tapped), to receive for hitch roll 4 being remained on to the screw 6 on plate 3.Screw 6 extends along the axis X 4 overlapping with axis 36, and is provided with the screw head 61 on the front side that is positioned at hitch roll 4.

Hitch roll 4 comprises belt wheel 7, and this belt wheel centers on roll axis X4, and is arranged in the periphery of this belt wheel with 1.Belt wheel 7 comprises boring 71, and bearing 8 is positioned in hole 71, and described bearing 8 centers in axis X 4, and supports belt wheel around the rotation of axis X 4.Bearing 8 comprises outer race 81 and inner race 82, about axis X 4, radially defines rolling chamber.Rolling bearing cover 83 is positioned in this chamber, is provided for keeping rolling element, for example the ball in Fig. 5 84.Alternatively, rolling element can be roller.

Belt wheel 7 rigidity are arranged on the outer race 8 of bearing 8, and bearing 8 stationary positioned are in hole 71.Two abutments (abutment) 72 and 73 directions along the X4 that parallels to the axis are formed on each side in hole 71.

Abutment

72 and 73 outer race 81 of holding, and stop belt wheel 7 any axial motion along axis X 4 with respect to bearing 8.

Hitch roll 4 also comprises the roller support 9 centering on roll axis X4.Roller support 9 comprises cylinder 91 and annular disk 92, and this annular disk has the diameter larger than the diameter of cylinder 91.The inner race 82 of bearing 8 comprises that diameter is substantially equal to the hole of the diameter of cylinder 91, and cylinder 91 is mounted wherein.Advantageously, on the front side of hitch roll 4, inner race 82 can be secured to cylinder 91 by the crimping against inner race 82 being integrated with post 91.On the rear side of hitch roll 4, circular disk 92 contacts inner races 82, and is formed for the other axial abutment of this seat ring 82.

Roller support 9 is also provided with through hole 93, and it centers on screw axis X6, and this axis X 6 is about roll axis 4 radial deflections and be parallel to roll axis 4.Through hole 93 is provided for receiving screw 6, and then screw 6 can screw in tapped hole 36, so that hitch roll 4 is held in place with respect to plate 3.Roller support 9 is also provided with back plane surface 94, and back plane surface 94 is provided for forming and contacting with the front surface 331 of plate 3.Roller support 9 is also provided with frontal plane surface 95, and screw head 51 supports this frontal plane surface 95 when screw 6 is threaded in tapped hole 36.In order to increase it against the bearing surface on this surface 95, screw head 61 can be advantageously provided flange 62, and flange 62 is fixed to described screw head 61.Alternatively, packing ring 62 can be discrete with screw head 61.

When hitch roll 4 is installed on plate 3, and screw 6 is while being positioned in

opening

93 and 36, and axle X6 and X36 overlap, simultaneously parallel and about roll axis X4 radial disbalance.Thereby when screw 6 is not held against roller support 9, hitch roll 4 can be around pivot axis X6 rotation, pivot axis X6 is limited by screw 6, with respect to its axis X 4 bias.Preferably, hitch roll 4 can be moved by instrument being inserted to (blind) housing 97 of an end opening that is formed on surperficial 95 places in roller support 9 by operator.Alternatively, housing 97 is not an end opening, but the X4 that parallels to the axis is through roller support 9.

In fact, screw 6 and tapped hole 36 form locking device, for respect to plate 3, hitch roll 4 being locked in to the different structure of tension device 2, construct in particular in C1 and C2.

First, especially, when it gives the operator who is responsible for installation traction loop, hitch roll 4 is locked in the mounting construction C1 of Fig. 1.Then the

hole

311 and 321 of plate 3 can be got involved in the front portion of tension device 2 by operator.Thereby allow and be convenient to the installation of plate 3 in engine wall.

And before tension band 1, and particularly when being with 1 to be stretched, hitch roll 4 may be locked in the effect structure C2 of Fig. 2 to 5.The hole 311 of plate 3 no longer can be got involved by the front portion of tension device 2 by operator.In this effect structure C2, by tending to locking

device

6 and 36 releases with 1 effect of stress being applied on hitch roll 4, and thereby make hitch roll 4 turn back to mounting construction C1 or surpass mounting construction C1 from effect structure C2.These stress arrow Fc relative with arrow F in Fig. 2 schematically shows.In this case, no longer satisfactory with the operational risk in traction loop with 1 tension force.

By being provided for stoping hitch roll 4 to turn back to the anti-blocking device that returns of mounting construction C1 with respect to plate 3 from effect structure C2, the invention enables and can solve this defect.According to the present invention, these are anti-returns to blocking device and

locking device

6 and 36 is discrete, and make in effect structure C2, to avoid hitch roll 4 around any rotation of pivot axis X6, particularly in the situation that locking

device

6 and 36 is unlocked when tension device 2 uses.

Roller support 9 is also provided with projection 98, and it extends back outstanding along the direction that is totally parallel to axle X4 and X6 towards plate 3 from surface 94.Preferably, projection 98 is integrated with roller support 9, and for example the two is by the molded single-piece that forms, and then the profile of projection 98 is defined in roller support 9 by machining.Alternatively, projection 98 can be to be attached to the discrete parts (for example inserting in the dedicated openings of roller support 9) on roller support 9.And projection 98 can have and is anyly suitable for shape of the present invention, and does not exceed scope of the present invention.In the example of Fig. 1 to 3, projection 98 has planar side, and it extends perpendicular to surface 94, and connects by 98a after plane, and 98a is parallel to surface 94 and extends after plane.

When tension device 2 is assembled, projection 98 is accommodated in the peripheral recess 37 on the outward edge of the supporting part 33 that is formed on exclusively plate 3.More specifically, recess 37 is formed in the part 33 at surperficial 331 places, on the radially relative edge of the axis X 36 of the front side with plate 3.Preferably, recess 37 is formed at the most on 1/4th of girth on the surface 331 of part 33.

In the example of Fig. 3, recess 37 comprises inclined-plane 37a, the front side of its slave plate 3 orientation, and tilting along chamber 37 so that the gap between inclined-plane 37a and surface 94 along with the end 32 of slave plate 3 away from and reduce.Recess 37 has parallelepiped section along comprising in the axial cross section of planar interception of axis X 6, and described section develops along plane of inclination 37a.Recess 37 is being for circular sector (circular sector), unless when cutting planes and plane of inclination 37a are when crossing about axis X 6 in cross section radially.

In this fan-shaped end that approaches end 31 most of recess 37, this recess 37 comprises chamber 38, and plane of inclination 37a exposes in chamber 38.In the example of Fig. 3 to 5, this chamber 38 comprises a planar side, and it extends perpendicular to surface 331 and connects by being parallel to before the planes of extending on surface 331.In the present circumstance, the side of chamber 38 and having above and the side of projection 98 and corresponding layout and size below.

When tension device 2 is in effect structure C2, projection 98 is accommodated in chamber 38, and wherein their faces respect to one another abut each other, as shown in Figure 3.Thereby the machinery by described chamber 38 and projection 98 coordinates, hitch roll 4 is stoped automatically around any rotation of the pivot axis X6 being limited by screw 6 and chamber 93.In other words, chamber 38 and projection 98 form hitch roll 4 about the anti-blocking device that returns of plate 3.Chamber 38 formations belong to the protruding anti-of plate 3 and return to element, and projection forms the recessed anti-element that returns that belongs to hitch roll 4.Chamber 38 and projection 98 axially form with respect to axis X 6.

In this stage, it should be noted, in order to be converted to effect structure C2 from mounting construction C1 when

locking device

6 and 36 is unlocked, the operator X6 that hitch roll 4 and plate 3 must be paralleled to the axis divides out.Otherwise projection 98 abuts the inclined-plane 37a of recess 37, and can no longer stretch in chamber 38.If separated with plate 3, hitch roll 4 can be around axis X 6 pivotables, and projection 98 can low location relative to chamber 38.After making the more close plate 3 of hitch roll 4, in acting on structure C2, the

anti-blocking device

38 and 98 that returns stops hitch rolls 4 to turn back to mounting construction C1 automatically, and no matter

locking device

6 and 36 locks or releases, and needn't force operator that its instrument is remained in hole 97.Thereby operator is more practical and more do not handle tension device 2 not tiredly.

Finally, for tension device 2 being locked in effect structure C2, operator uses fastened tools (for example screw-driver) that appointment moment of torsion is applied on screw head 61.

Anti-return blocking device

38 and 98 therefore with

locking device

6 and 36 complementations, improve thus tension device 2 performance in time.

Fig. 5-9 have shown other embodiments according to tension device 2 of the present invention.Some elements are similar to the first embodiment's recited above constituent element, and have identical reference character.For the sake of simplicity, the difference about the first embodiment has hereinafter only been described.

Fig. 5 to 8 has shown the second embodiment of tension device, comprises projection 198, and this projection 198 has about the slightly different structure of the first embodiment's projection 98, but similarly running.

Under existing conditions, plate 3 comprises supporting part 133, and its supporting part 33 than the first embodiment is lighter.Be formed on chamber 38 in this part 133 and comprise two planar side 38b and the 38c being connected by plane 38a, as in the first embodiment.This projection comprises two side 198b and the 198c being connected by plane 198a.In projection 198, be positioned as when relative with chamber 38, operator can feel that face 198b abuts face 38b.In effect structure C2, when driving component stretches, face 198c abuts face 38c.

Main difference involvement aspect 198a between projection 198 and projection 98, it tilts along a gradient, is similar to the gradient of plane of inclination 37a.Thereby, if operator forgets, hitch roll 4 and plate 3 are axially separated along the X6 that parallels to the axis, to change effect structure into from mounting construction C1, face 198a supporting surface 7a, reduces the risk that this face 37a is damaged.

Fig. 9 has shown the 3rd embodiment of tension device 2.Plate 3 is provided with reference R 3, and hitch roll 4 is provided with reference R 4.In the non-limiting example of Fig. 9, reference R 3 is positioned in the recess 33a of supporting part 33, and reference R 3 is positioned on surface 94.When tension device 2 is in mounting construction C1, reference R 3 and R4 orientate as toward each other.Therefore be convenient to about plate 3, orientate hitch roll 4 as mounting construction C1 before being delivered to the operator who is responsible for installation traction loop.

Alternatively or in addition, tension device 2 can have and is arranged so that and can identifies its heteroid different objects of reference, and described structure is the effect structure C1 of tensioning driving component particularly.

And tension device 2 can differently configure from Fig. 1 to 9, and does not exceed scope of the present invention.Especially, resist and return to any layout, shape and/or the size that blocking device can have the application of being applicable to.

In unshowned alternative form, anti-return to blocking device and can comprise protruding element and the recessed element radially forming about pivot axis X6.

According to unshowned another alternative form, protrudingly anti-return to element and belong to plate 3, and recessedly anti-ly return to element and belong to hitch roll 4.

According to another unshowned alternative form, the protruding anti-blocking device that returns can comprise and belongs to the some protruding element of plate 3 or hitch roll 4 and the recessed element of some complementations.

And all or some technical characteristicss of different embodiments can combination with one another.Thereby tension device can be used according to cost, function and performance.

Claims

1. A tensioning device (2) comprising:

mounting plate (3);

A tensioning roller (4) centered on the roller axis (X4) and movably mounted on said plate (3) has a pivot axis ( X6) At least one rotational degree of freedom between at least one mounting configuration (C1) and one active configuration (C2) for tensioning (F) positioned on the tensioning roller (4) traction member (1);

locking means (6, 36) for locking the tensioning roller (4) in the different configurations (C1, C2) of the tensioning device (2) relative to the plate (3); and

anti-return blocking means (38,98; 38,198) preventing return of the tensioning roller (4) relative to the plate (3) from the active configuration (C2) to the installed configuration (C1), said anti-return blocking means (38,98; 38,198) are different from locking devices (6,36);

It is characterized in that said anti-return blocking device (38,98; 38,198) comprises:

a convex anti-return element formed by a protrusion (98; 198) belonging to the first member from the plate (3) and the tension roller (4), and

Concave anti-return element, formed by a cavity (38) formed in a peripheral recess (37) on the outer edge of the second member from the plate (3) and the tension roller (4 );

And it is characterized in that, in the active configuration (C2), the protrusion (98; 198) is accommodated in the hollow part (38), wherein the opposite faces of said protrusion and the hollow part abut each other, when the traction member (1) exerts Under the action of the stress on the tension roller (4), said anti-return elements (38, 98; 38, 198) cooperate while preventing the tension roller (4) from returning to the installed configuration (C1).

2. Tensioning device (2) according to claim 1, characterized in that the anti-return block is provided in case the locking means (6, 36) are unlocked when the tensioning device (2) is in use The means ( 38 , 98 ; 38 , 198 ) automatically prevent the rotation of the tensioning roller ( 4 ) about the pivot axis ( X6 ) in the active configuration ( C2 ).

3. The tensioning device (2) according to claim 1, characterized in that the chamber (38) and the peripheral recess (37) are formed in the part of the plate (3) supporting the tensioning roller (4) ( 33), and the protrusion (98; 198) is integrated with the part (9) of the support bearing (8) of the tension roller (4).

4. The tensioning device (2) according to claim 1, characterized in that the cavity (38) and the peripheral recess (37) are formed in the support bearing (8) of the tensioning roller (4) In the part (9), the protrusion (98; 198) is integrated with the part (33) of the plate (3) supporting the tension roller (4).

5. The tensioning device (2) according to claim 1 , characterized in that the male anti-return element (98; 198) and the female anti-return element (38) are respectively axially aligned with respect to the pivot axis (X6). Formed in the first member and the second member.

6. The tensioning device (2) according to claim 1 , characterized in that the male anti-return element (98; 198) and the female anti-return element (38) are respectively radial with respect to the pivot axis (X6) Formed in the first member and the second member.

7. The tensioning device (2) according to claim 1 , characterized in that, in the mounted configuration (C1 ), the protrusion (98; 198) is housed in the peripheral recess (37).

8. The tensioning device (2) according to claim 1, characterized in that the peripheral recess (37) is formed at most the circumference of the part (33) of the plate (3) supporting the tensioning roller (4) on a quarter of.

9. Tensioning device (2) according to claim 1, characterized in that during the transition from the installed configuration (C1) to the active configuration (C2) the locking means (6, 36) are unlocked and the tensioning roller (4) separate from the plate (3) parallel to the pivot axis (X6), otherwise the protrusion (98; 198) abuts against the face (37a) of the recess (37) and is characterized in that the tension roller ( 4) After a closer approach towards the plate (3), in the active configuration (C2), the anti-return blocking means (38, 98; 38, 198) automatically block the tensioning rollers regardless of whether the locking means (6, 36) are locked or unlocked (4) Return toward the installation configuration (C1).

10. An engine equipped with at least one traction member (1 ), characterized in that it is also equipped with at least one tensioning device (2) according to one of the preceding claims.