CN201531571U - Novel belt tensioning device of automobile engine - Google Patents
Novel belt tensioning device of automobile engine Download PDFInfo
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- CN201531571U CN201531571U CN2009200745606U CN200920074560U CN201531571U CN 201531571 U CN201531571 U CN 201531571U CN 2009200745606 U CN2009200745606 U CN 2009200745606U CN 200920074560 U CN200920074560 U CN 200920074560U CN 201531571 U CN201531571 U CN 201531571U
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Abstract
The utility model discloses a novel belt tensioning device of an automobile engine. The utility mode solves the problems of eliminating or reducing slippage of a belt by putting forward the technical solution that the novel belt tensioning device comprises a base (1) and the like, and is characterized by further comprising a close cover (7), an elastic plate (10) and an asymmetric damping block (6), wherein the closed cover (7) is located at a circular cavity (13) on a first end of a rocker arm (5), one face of the closed cover (7) corresponding to the cavity is provided with a protruded push structure (12), the asymmetric damping block (6) is elastically connected with a divided push structure through the elastic plate (10) and the push structure, the upper end surface and the lower end surface of the asymmetric damping block are of planes, the front portion is small, the back portion thereof is large, the outer lateral face of the damping block is of circular arc, and is inosculated with a circular wall (13-1), the inner lateral face is of sunken arc shape, and the outer lateral face of each divided push structure is of convex arc shape. The novel belt tensioning device has the beneficial effects that the problems of the slippage and shaking of the belt, large vibration amplitude, vibration and noise of the engine and the like can be eliminated or reduced owing to different counter damps.
Description
Technical field
The utility model relates to automobile technical field, particularly relates to a kind of novel belt stretcher of motor car engine.
Background technique
Drivign belt on the motor car engine, when motor car engine is worked, for can be efficiently backward level transmit energy, need make drivign belt keep good tension force, be that tension force remains in certain number range, tension force too big or too little to energy transfer, motor etc. is unfavorable.
In order to reach above-mentioned target, Hyundai Motor generally uses belt stretcher.The compressing of Idle wheel in the belt stretcher is on drivign belt, and it carries out the adjusting of both direction: when belt tension force occurs too small the time, Idle wheel can press down automatically towards lower direction, to keep tension force constant substantially; When overtension appearred in belt, Idle wheel direction was up lifted on automatically, to keep tension force constant substantially.
In order to reach the good technical effect, belt stretcher inside not only is provided with torsion spring, also is provided with the damping part, being belt stretcher is depressing or is lifting Idle wheel, keeping in the constant substantially process to keep tension force, and the action of Idle wheel is except main influence that mainly is subjected to torsion spring, also be subjected to the influence of damping force.
The product of prior art, employing be symmetrical damping, i.e. the belt stretcher of motor car engine of the prior art, its Idle wheel is keeping automatically, is regulating in the process of drivign belt rate of tension, the damping of both direction is equally big, the defective of its existence is as follows.
1. if damping is provided with greatlyyer, the problem that will occur is: when a. further depressed belt at belt resilience, Idle wheel, the damping direction will consume too much spring torque because opposite with the spring torque direction, make belt tension not enough, produce the noise that skids; B. may cause rocking arm and Idle wheel in time not to reply, make belt and Idle wheel throw off, perhaps belt slippage perhaps produces the noise that belt and Idle wheel are patted, and influences the life-span.
2. if damping is provided with lessly, the problem that will occur is: when belt was pressed to tension pulley, spring torque and damping sum were less, situations such as shake of train belt and rocking arm Oscillation Amplitude are bigger can occur, and motor is easy to generate vibration and noise.
The model utility content
The belt stretcher of prior art, if damping is provided with greatlyyer, the problem that will occur is: when a. further depresses belt at belt resilience, Idle wheel, the damping direction is because opposite with the spring torque direction, too much spring torque will be consumed, make belt tension not enough, produce the noise that skids; B. may cause belt and rocking arm in time not to reply, make belt and Idle wheel throw off, perhaps belt slippage perhaps produces the noise that belt and belt pulley are patted, and influences the life-span; If damping is provided with lessly, the problem that will occur is: when belt was pressed to tension pulley, spring torque and damping sum were less, situations such as shake of train belt and rocking arm Oscillation Amplitude are bigger can occur, and motor is easy to generate vibration and noise.In order to solve the problems of the technologies described above, the utility model proposes following technological scheme.
1. the novel belt stretcher of a motor car engine comprises base, is arranged on the torsion spring in the base, has the rocking arm of first end, second end, central shaft, and Idle wheel keeps predetermined torque power and the limit structure that limits the rocking arm rotation angle;
Described torsion spring is involute shape, has two ends that one end thereof is inner end, is positioned at the centre that its another be the outer end, be positioned at the outside; Second end of described Idle wheel and rocking arm is rotationally connected;
The outer end of torsion spring is connected with base; Central shaft, it is from top to bottom in regular turn: fixedly connected with base, be rotationally connected with rocking arm first end, fixedly connected with capping; The inner end of torsion spring is connected with first end of rocking arm; Second end of Idle wheel and rocking arm is rotationally connected;
Comprise: capping, four spring sheets, four asymmetric damping pieces;
Described rocking arm first end is provided with round chamber, and promptly the bottom of cavity is that the wall of disk, cavity is a circular wall; Central shaft passes the bottom of cavity and is rotationally connected with rocking arm first end;
Capping is positioned at the round chamber place of rocking arm first end and fixedlys connected with the upper end of central shaft;
Capping is provided with the promotion structure of projection towards the one side of cavity, and described promotion structure comprises the promotion separation structure; The quantity that promotes separation structure is that four and its shape and structure are the rotation symmetry;
Described asymmetric damping piece is made by elastic material, and it is between circular wall and promotion separation structure; Spring sheet, its front end is connected with the rear portion of asymmetric damping piece, its rear end is connected with the promotion separation structure, and promptly the asymmetric damping piece realizes that with the promotion separation structure elasticity is connected by spring sheet;
Each asymmetric damping piece, its upper and lower end face are that plane, its front portion are major part for microcephaly, rear portion, and its side outwardly is a circular arc and identical with the shape of circular wall, and its side inwardly is the arc of depression; Each promotes separation structure, and adjacent with the asymmetric damping piece is the arc that protrudes towards outer side surface; Each promotes separation structure and all offers backer's structure of slotted eye being installed and being equipped with projection;
Each spring sheet, it is the shape of bending, and its rear and low part is inserted in to be installed in the slotted eye, and its front upper part is positioned at the front side of backer's structure and offsets with the rear elastic of asymmetric damping piece.
2. described central shaft, its axis place is a hollow-core construction.
3. the outer end of described torsion spring is connected with base, and its connection is meant fixedly connected or is meant that the elbow structure formula connects; Described elbow structure formula connects the outer end that refers to torsion spring and is fabricated to the structure that snaps in that can snap in elbow is set on elbow-shaped, the base, and the outer end of elbow-shaped packs into and snaps in structure;
The inner end of described torsion spring is connected with first end of rocking arm, and its connection is meant fixedly connected or is meant that the elbow structure formula connects; Described elbow structure formula connects and refers to that the inner end of torsion spring is fabricated to elbow-shaped, and first end of rocking arm is provided with the structure that snaps in that can snap in elbow, and the inner end of torsion spring elbow-shaped packs into snapping in the structure of rocking arm.
4. described belt stretcher has comprised at interval and the interlayer sheet of the effect of reducing wear that it is arranged between torsion spring and the rocking arm, and all rotation contacts with rocking arm with torsion spring.
5. described limit structure is the first projection piece to be set on the rocking arm, the second projection piece and the 3rd projection piece are set on base; Three projection pieces on the same circular arc line and the first projection piece be arranged between other two projection pieces, under the situation that Idle wheel is not under pressure, the first projection piece and the second projection piece butt touch, be subjected at Idle wheel under the situation of normal pressure, the first projection piece is positioned at the middle position of the second projection piece and the 3rd projection piece, be subjected at Idle wheel under the situation of super large pressure, the first projection piece and the second projection piece butt touch.
The beneficial effects of the utility model
A kind of novel belt stretcher of asymmetric damping has been proposed, that is: when becoming big when the rate of tension of dynamo belt is increased by the normal value trend or by normal value, novel belt stretcher of the present utility model regulates, keeps rate of tension in the scope of normal value with the high damping state automatically; When diminishing when the rate of tension of dynamo belt is reduced by the normal value trend or by normal value, novel belt stretcher of the present utility model regulates, keeps rate of tension in the scope of normal value with the low resistance state automatically.
Say that further the utility model also has following benefit:
In tensioning belt occur under the situation of further tensioning; rocking arm still can rotate, drive Idle wheel flexibly and lift, reduces and recover rate of tension in than the state of high damping; also can eliminate problems such as the shake of train belt, rocking arm Oscillation Amplitude are bigger simultaneously, avoids or obviously reduces vibration and the noise that motor produces.
2. when diminishing when the rate of tension of drivign belt is reduced by the normal value trend or by normal value, owing to be in the state of low resistance, Idle wheel can press down, make the rate of tension of belt in time to be improved under the drive of rocking arm rapidly and recover.
3. when Idle wheel pressed down belt, owing to be to carry out under the condition of low resistance, so that spring torque consumes is little, and pressing action was timely rapidly, and belt does not produce and skids and problem such as noise.
Description of drawings
Fig. 1 is the utility model motor car engine belt stretcher schematic perspective view, has made separating treatment among the figure;
Fig. 2 is the plan view of the utility model motor car engine belt stretcher;
Fig. 3 is the right elevation of Fig. 2;
Fig. 4 is the rear view of Fig. 2;
Fig. 5 is the width of cloth plan view identical with Fig. 2 visual direction but has done the local processing of analysing and observe;
Fig. 6 is the left view of Fig. 2, has done the local processing of analysing and observe among the figure;
Fig. 7 is the shape and structure of central shaft, asymmetric damping piece, spring sheet, promotion structure, round chamber, circular wall and the schematic representation of annexation;
Fig. 8 is the schematic perspective view of capping, and capping is provided with the promotion structure of projection towards the one side of cavity, promotes structure and comprises and promote four rotational symmetric separation structures;
Fig. 9 is one of schematic perspective view of asymmetric damping block;
Figure 10 be asymmetric damping block schematic perspective view two;
Figure 11 is the schematic perspective view of spring sheet;
Figure 12 is the schematic representation that rocking arm first end is provided with round chamber, and the bottom of cavity is that the wall of disk, cavity is a circular wall;
Figure 13 is the schematic representation among the embodiment one;
Figure 14 is the schematic representation of the first projection piece, the second projection piece and the 3rd projection piece, this figure can with Fig. 2 paired observation.
Label declaration among the figure: the 1st, base; 1-1 is the second projection piece; 1-2 is the 3rd projection piece; The 2nd, torsion spring; The 3rd, central shaft; The 4th, the interlayer sheet; The 5th, rocking arm; 5-1 is the first projection piece; 5-2 snaps in notch; The 6th, asymmetric damping block; The 7th, capping; The 9th, Idle wheel; The 10th, spring sheet; The 12nd, promote structure; The 13rd, round chamber; 13-1 is a circular wall; The 14th, spring; The 15th, generator; The 16th, runner; The 17th, belt stretcher; The 18th, runner; The 19th, motor; The 20th, belt; The 21st, driving pulley.
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Embodiment
Below, earlier the technical solution of the utility model is carried out overall description, introduction and explanation.
The novel belt stretcher of a kind of motor car engine of the present utility model, referring to Fig. 1 to Fig. 4, it comprises: base 1, be arranged on the torsion spring 2 in the base 1, Rocker arm 5 with first end, second end, central shaft 3, Idle wheel 9 keeps predetermined torque power and the limit structure that limits the Rocker arm 5 rotation angle; Described torsion spring 2 is involute shape, has two ends that one end thereof is inner end, is positioned at the centre that its another be the outer end, be positioned at the outside; Described Idle wheel 9 is rotationally connected with second end of Rocker arm 5; The outer end of torsion spring 2 is connected with base 1; Central shaft 3, it is from top to bottom in regular turn: fixedly connected with base 1, be rotationally connected with Rocker arm 5 first end, fixedly connected with capping 7; The inner end of torsion spring 2 is connected with first end of Rocker arm 5; Idle wheel 9 is rotationally connected with second end of Rocker arm 5.
Describe (because drawing length relation, Figure 12 is reduced into 50% and draws) in conjunction with Fig. 5 to Figure 12 again: distinguished is that belt stretcher of the present utility model also comprises: 10, four asymmetric damping pieces 6 of 7, four spring sheets of capping;
Described Rocker arm 5 first end is provided with round chamber 13, and promptly the bottom of cavity is that the wall of disk, cavity is circular wall 13-1; Central shaft 3 passes the bottom of cavity and is rotationally connected with Rocker arm 5 first end;
Capping 7 is positioned at round chamber 13 places of Rocker arm 5 first end and fixedlys connected with the upper end of central shaft 3;
Capping 7 is provided with the promotion structure 12 of projection towards the one side of cavity, and described promotion structure 12 comprises the promotion separation structure; The quantity that promotes separation structure is that four and its shape and structure are the rotation symmetry.
Described asymmetric damping piece 6 is made by elastic material, and it is at circular wall 13-1 and promote between the separation structure.Asymmetric damping piece 6 is made by elastic material, specifically makes the elastic material of asymmetric damping piece 6, can be nylon, plastics or specific rubber etc., and selection is the wear resistance that will consider material, robustness, rigidity and flexible or the like.Spring sheet 10, its front end is connected with the rear portion of asymmetric damping piece 6, its rear end is connected with the promotion separation structure, and promptly asymmetric damping piece 6 realizes that with the promotion separation structure elasticity is connected by spring sheet 10;
Each asymmetric damping piece 6, its upper and lower end face are that plane, its front portion are major part for microcephaly, rear portion, and its side outwardly is a circular arc and identical with the shape of circular wall 13-1, and its side inwardly is the arc of depression; Each promotes separation structure, and is adjacent with asymmetric damping piece 6 towards the arc of outer side surface for protruding; Each promotes separation structure and all offers backer's structure of slotted eye being installed and being equipped with projection;
Each spring sheet 10, it is the shape of bending, and its rear and low part is inserted in to be installed in the slotted eye, and its front upper part is positioned at the front side of backer's structure and offsets with the rear elastic of asymmetric damping piece 6.Spring sheet 10 can be to insert to install in the slotted eye, can also be to be adhesively fixed with powerful viscose glue more afterwards in inserting the installation slotted eye.Above-mentioned spring sheet 10 also can be described as spring sheet, and it has the better elastic performance.
In conjunction with Fig. 7 description and interpretation: asymmetric damping piece 6 side inwardly, promote the adjacent side of separation structure and asymmetric damping piece 6, these two sides have following a and b character:
A. it is motionless relatively that hypothesis promotes separation structure, when asymmetric damping piece 6 under the acting in conjunction of circular wall 13-1 and spring sheet 10, when a certain clockwise relatively rotates, between these two sides more and more closely, compressing power is increasing.
B. it is motionless relatively that hypothesis promotes separation structure, when asymmetric damping piece 6 under the acting in conjunction of circular wall 13-1 and spring sheet 10, when a certain opposite clockwise relatively rotates, between these two sides more and more far, compressing power is more and more littler.
Above-mentioned a and b character are: when Rocker arm 5 a certain direction takes place rotated, what it was subjected to was big damping and increasing; Otherwise when Rocker arm 5 generation counter-rotation, what it was subjected to is less damping and more and more littler.
Above the technical solution of the utility model is carried out overall description, introduction and explanation.Below each further technological scheme of the present utility model is described, introduces and illustrates.
Further technological scheme 1.
Described central shaft 3, its axis place is a hollow-core construction.The technical program is compared with the central shaft 3 of solid construction, and cost is low, easy to process, allows the two ends of hollow-core construction central shaft 3 be dilatating and deformable as long as exert pressure, and just can make base 1, capping 7 fixedly connected.
Further technological scheme 2.
The outer end of described torsion spring 2 is connected with base 1, and its connection is meant fixedly connected or is meant that the elbow structure formula connects; Described elbow structure formula connects the outer end that refers to torsion spring 2 and is fabricated to the structure that snaps in that can snap in elbow is set on elbow-shaped, the base 1, and the outer end of elbow-shaped packs into and snaps in structure;
The inner end of described torsion spring 2 is connected with first end of Rocker arm 5, and its connection is meant fixedly connected or is meant that the elbow structure formula connects; Described elbow structure formula connects and refers to that the inner end of torsion spring 2 is fabricated to elbow-shaped, and first end of Rocker arm 5 is provided with the structure that snaps in that can snap in elbow, and the inner end of torsion spring 2 elbow-shaped packs into snapping in the structure of Rocker arm 5.
" fixedly connected " in the above-mentioned literal can be to be screwed connection, riveted joint or other fixation method to connect.
" connection of elbow structure formula " in the above-mentioned literal can be understood referring to Fig. 1 and Figure 12.As shown in Figure 1: the outer end of torsion spring 2 is fabricated to elbow-shaped and snaps on the base 1 upper process piece; As Fig. 1 and shown in Figure 12: what the inner end of torsion spring 2 was fabricated to elbow-shaped and inserted Rocker arm 5 among Fig. 1 snaps in notch 5-2 (this snaps in notch 5-2 as shown in Figure 12).Because torsion spring 2 has been preset the torque force that shrinks, the outer end of torsion spring 2, inner end snap in the back and can not fall down under the effect of torque force, are fixed firmly.
Further technological scheme 3.
Described belt stretcher has comprised at interval and the interlayer sheet 4 of the effect of reducing wear that it is arranged between torsion spring 2 and the Rocker arm 5, and all rotation contacts with Rocker arm 5 with torsion spring 2.The technical program can be understood referring to Fig. 1.
Further technological scheme 4.
Described limit structure is the first projection piece 5-1 to be set on the Rocker arm 5, the second projection piece 1-1 and the 3rd projection piece 1-2 are set on base 1; Three projection pieces on the same circular arc line and the first projection piece 5-1 be arranged between other two projection pieces, under the situation that Idle wheel 9 is not under pressure, the first projection piece 5-1 and the second projection piece 1-1 butt touch, be subjected at Idle wheel 9 under the situation of normal pressure, the first projection piece 5-1 is positioned at the middle position of the second projection piece 1-1 and the 3rd projection piece 1-2, be subjected at Idle wheel 9 under the situation of super large pressure, the first projection piece 5-1 and the second projection piece 1-1 butt touch.
The technical program can be understood referring to Fig. 2 and Figure 14.
As shown in Figure 2, under the situation that Idle wheel 9 is not under pressure, because the effect of torsion spring 2, the left side of the right side of the first projection piece 5-1 and the second projection piece 1-1 is inconsistent.
Be subjected at Idle wheel 9 under the situation of increasing pressure, a part of torque force of torsion spring 2 is overcome, Idle wheel 9 moves right and drives the Rocker arm 5 rotation, and Rocker arm 5 rotates and drives first projection piece 5-1 disengaging and second projection piece 1-1 conflict again, also turns left counterclockwise.In the said process, base 1 is fixed motionless.
When factory inspection, if Idle wheel 9 is continued to apply bigger pressure, the torque force that is overcome is more; Rocker arm 5 is rotated further; the right side until the left side of the first projection piece 5-1 and the 3rd projection piece 1-2 is inconsistent, and as shown in figure 14, Rocker arm 5 has also just stopped rotation.
Embodiment one
In conjunction with Fig. 1 to Fig. 8, and Figure 13, totally 9 width of cloth figure describe.Fig. 1 is the utility model motor car engine belt stretcher schematic perspective view, has made separating treatment among the figure; Fig. 2 is the plan view of the utility model motor car engine belt stretcher; Fig. 3 is the right elevation of Fig. 2; Fig. 4 is the rear view of Fig. 2; Fig. 5 is the width of cloth plan view identical with Fig. 2 visual direction but has done the local processing of analysing and observe; Fig. 6 is the left view of Fig. 2, has done the local processing of analysing and observe among the figure; Fig. 7 is the shape and structure of central shaft, asymmetric damping piece, spring sheet, promotion structure, round chamber, circular wall and the schematic representation of annexation; Fig. 8 is the schematic perspective view of capping, and capping is provided with the promotion structure of projection towards the one side of cavity, promotes structure and comprises and promote four rotational symmetric separation structures; Figure 13 originally is the schematic representation among the embodiment one.
As shown in figure 13, the output shaft of motor 19 drives driving pulley 21 and rotates, and driving pulley 21 drives generators 15 by drivign belt 20 and rotates, thereby mechanical energy is changed into electric energy, makes the generator output current, and is bright or the like to storage battery charging and steam supply licence.Among Figure 13, the belt stretcher 17 of the utility model motor car engine, fixedly connected with motor 19 (more specifically: be that base 1 is fixedlyed connected with motor 19 by support) by support, the Idle wheel 9 on the belt stretcher 17 is pressed on the drivign belt 20.
Above mechanical structure can make the tension force of drivign belt 20 remain in the suitable number range automatically; That is: when overtension, Rocker arm 5 is the center of circle, rotates automatically in the direction of the clock with the axis of central shaft 3, thereby lifts Idle wheel 9, reduced the tension force of belt 20, and the tension force on the belt 20 is remained in the range of normal value; Otherwise, when tension force is too small, Rocker arm 5 with the axis of central shaft 3 be the center of circle, by counterclockwise rotating automatically, thereby further press down Idle wheel 9, improved the tension force of belt 20, the tension force on the belt 20 is remained in the range of normal value.In course of action described above, Rocker arm 5 rotates but base 1 does not rotate.
In the belt stretcher 17 of the present utility model, torsion spring 2 is arranged in the base 1, and it is involute shape, fixedlys connected with base 1 in its outer end that is positioned at outside left, and its inner end that is positioned at the intermediate portion is fixedlyed connected with first end of Rocker arm 5.Belt stretcher 17 is after the assembling completion, perhaps said before being installed on the motor 19, its torsion spring 2 has been preset torque force, in order to prevent that torsion spring 2 resiliences in other words for the torque force that keeps presetting on the torsion spring 2 is constant, also are provided with limit structure in the device.The limit structure effect has two: the one, before belt stretcher 17 is installed on the motor 19, keep torque force default on the torsion spring 2 constant, the 2nd, after belt stretcher 17 is installed on the motor 19, the slewing area of Rocker arm 5 is done to limit, is that Rocker arm 5 only allows to rotate, thereby stipulated extreme lower position that Idle wheel 9 is depressed and the extreme higher position of lifting in certain angular range.
Central shaft (3, fixedly connected with base 1 in its lower end, fixedly connected with capping 7 in its top, so both kept base 1 and capping 7 can not split away off, kept again relative rotation can taking place between base 1 and the capping 7, promoted thus also relative rotation can not take place between structure and the base 1.
When belt stretcher 17 is installed on the motor 19, after Idle wheel 9 is pressed on the belt 20 and all assembling and setting is finished, tension force on the Idle wheel 9 meets the requirements, compare with preceding situation is installed this moment, and the inner end of Rocker arm 5 and torsion spring 2 has rotated certain angle (rotation of being said here is relative and base).
In general, for on being installed to motor 19 and debugged for the qualified belt stretcher 17, when motor 19 remains static; the position of Rocker arm 5; neither in the lower position that is allowed, also not at the upper limit position that is allowed, but better in the middle position, when motor 19 work; keep automatically for tension force, two-way all have a bigger regulation range.
Upper limit position and lower position rely on limit structure to realize.For limit structure, face before describing present embodiment is further being done detailed introduction in the technological scheme, just no longer repeats to have given unnecessary details here.
When engine operation was moved, if belt 20 tension force diminish, torsion spring 2 discharged Rocker arm 5 among torque forces, Figure 13 and rotated counterclockwise and drive Idle wheel 9 and press down this moment, thereby tension force on the belt 20 is strengthened and kept within the limits prescribed; If belt 20 tension force become big, torsion spring 2 was increased Rocker arm 5 among torque force, Figure 13 and clockwise rotated and drive Idle wheel 9 and lift this moment, thereby tension force on the belt 20 is reduced and kept within the limits prescribed.More concretely, the adjusting moment of mentioned strain, promote the strength that rocking arm rotates, mainly be belt 20 tension force that changed and the torque force of torsion spring 2, in addition from the more analysis of refinement, the asymmetric damping of using the asymmetric damping piece and producing has also influenced regulating effect in moment, and the asymmetric damping component that the utility model uses, its effect characteristics are: when belt 20 tension force are diminished by normal value, when needing Idle wheel 9 to press down; Rocker arm 5 rotates counterclockwise that to regulate the damping be subjected to little; can rotate Rocker arm 5 rapidly like this, belt 20 tension force are improved rapidly; When belt 20 tension force become big by normal value, the damping that is subjected to is big, and the tension force that increases newly like this will be smaller.
Make clear for further situation, describe and explain in conjunction with Fig. 5, Fig. 7, Fig. 8, Fig. 9, Figure 10, Figure 11 and Figure 12 now asymmetric damping.Fig. 5 is the width of cloth plan view identical with Fig. 2 visual direction but has done the local processing of analysing and observe; Fig. 6 is the left view of Fig. 2, has done the local processing of analysing and observe among the figure; Fig. 7 is the shape and structure of central shaft, asymmetric damping piece, spring sheet, promotion structure, round chamber, circular wall and the schematic representation of annexation; Fig. 8 is the schematic perspective view of capping, and capping is provided with the promotion structure of projection towards the one side of cavity, promotes structure and comprises and promote four rotational symmetric separation structures; Fig. 9 is one of schematic perspective view of asymmetric damping block; Figure 10 be asymmetric damping block schematic perspective view two; Figure 11 is the schematic perspective view of spring sheet; Figure 12 is the schematic representation that rocking arm first end is provided with round chamber, and the bottom of cavity is that the wall of disk, cavity is circular wall (because drawing length relation, Figure 12 is reduced into 50% and draws).
Have projection to promote the capping 7 of structure 12 among Fig. 8, it promotes structure and comprises four rotational symmetric separation structures of promotion.These capping 7 parts are aluminum alloy material, use one-time formed extrusion process manufacturing, i.e. capping 7 and top promotion structure 12 thereof are fabricated to one.
As shown in Figure 5, device comprises 10, four asymmetric damping pieces 6 of 7, four spring sheets of capping; Rocker arm 5 first end is provided with round chamber 13, and promptly the bottom of cavity is that the wall of disk, cavity is circular wall 13-1; Central shaft 3 passes the bottom of cavity and is rotationally connected with Rocker arm 5 first end; Capping 7 is positioned at round chamber 13 places of Rocker arm 5 first end and fixedlys connected with the upper end of central shaft 3; Capping 7 is provided with the promotion structure 12 of projection towards the one side of cavity, and described promotion structure 12 comprises the promotion separation structure; The quantity that promotes separation structure is that four and its shape and structure are the rotation symmetry; Described asymmetric damping piece 6 is made by elastic material, and it is at circular wall 13-1 and promote between the separation structure; Spring sheet 10, its front end is connected with the rear portion of asymmetric damping piece 6, its rear end is connected with the promotion separation structure, and promptly asymmetric damping piece 6 realizes that with the promotion separation structure elasticity is connected by spring sheet 10; Each asymmetric damping piece 6, its upper and lower end face are that plane, its front portion are major part for microcephaly, rear portion, and its side outwardly is a circular arc and identical with the shape of circular wall 13-1, and its side inwardly is the arc of depression; Each promotes separation structure, and is adjacent with asymmetric damping piece 6 towards the arc of outer side surface for protruding; Each promotes separation structure and all offers backer's structure of slotted eye being installed and being equipped with projection; Each spring sheet 10, it is the shape of bending, and its rear and low part is inserted in to be installed in the slotted eye, and its front upper part is positioned at the front side of backer's structure and offsets with the rear elastic of asymmetric damping piece 6.Spring sheet 10 can be to insert to install in the slotted eye, can also be to be adhesively fixed with powerful viscose glue more afterwards in inserting the installation slotted eye.
When the tension force of belt 20 diminishes, base 1 is motionless, the promotion structure 12 of capping 7 and projection thereof is also motionless; Rocker arm 5 is that the center of circle rotates counterclockwise with the axis of central shaft 3; be equivalent to circular wall 13-1 and rotate counterclockwise, at spring sheet 10 and promote under the acting in conjunction of separation structure, as can be seen: asymmetric damping piece (6) side inwardly; promote separation structure and the adjacent side of asymmetric damping piece (6), between these two sides more and more far, compressing power is more and more littler; Promptly the asymmetric damping piece (6) that this moment, circular wall 13-1 was subjected to is less damping and more and more littler.
When the tension force of belt 20 becomes, base 1 is motionless, the promotion structure 12 of capping 7 and projection thereof is also motionless; Rocker arm 5 is that the center of circle clockwise rotates with the axis of central shaft 3; be equivalent to circular wall 13-1 and clockwise rotate, at spring sheet 10 and promote under the acting in conjunction of separation structure, as can be seen: asymmetric damping piece (6) side inwardly; promote separation structure and the adjacent side of asymmetric damping piece (6), and is more and more tightr between these two sides, compressing power is increasing; Promptly the asymmetric damping piece (6) that this moment, circular wall 13-1 was subjected to is big damping and increasing.
In sum, in the utility model, when motor drivign belt 20 compressed Idle wheel, tension pulley 9 can provide higher damping; When motor drivign belt 20 unclamped Idle wheel 9, the damping of tension pulley was less.Its benefit is: 1. under belt 20 tensionings, the situation of appearance than high damping, Rocker arm 5 still can rotate flexibly, and can eliminate problems such as the train belt is shaken, the Rocker arm 5 Oscillation Amplitude is bigger, avoids motor to produce vibration and noise; 2. in the moment that belt 20 and Idle wheel 9 unclamp, Rocker arm 5 can be replied tightening belt 20 rapidly.3. the moment of unclamping when belt 20 relative Idle wheels 9, because damping is little, the torque consumption of torsion spring 2 is little, and the time compole of moment is short, tension force is exceedingly fast and returns to normal value, does not skid and problem such as noise so belt 20 does not produce.
Claims (5)
1. the novel belt stretcher of a motor car engine comprises base (1), is arranged on the torsion spring (2) in the base (1), rocking arm (5) with first end, second end, central shaft (3), Idle wheel (9) keeps predetermined torque power and the limit structure that limits rocking arm (5) rotation angle;
Described torsion spring (2) is involute shape, has two ends, and one end thereof is inner end, is positioned at the centre that its another be the outer end, be positioned at the outside; Described Idle wheel (9) is rotationally connected with second end of rocking arm (5);
The outer end of torsion spring (2) is connected with base (1); Central shaft (3), it is from top to bottom in regular turn: fixedly connected with base (1), be rotationally connected with rocking arm (5) first ends, fixedly connected with capping (7); The inner end of torsion spring (2) is connected with first end of rocking arm (5); Idle wheel (9) is rotationally connected with second end of rocking arm (5);
It is characterized in that: comprising: capping (7), four spring sheets (10), four asymmetric damping pieces (6);
Described rocking arm (5) first ends are provided with round chamber (13), and promptly the bottom of cavity is that the wall of disk, cavity is circular wall (13-1); Central shaft (3) passes the bottom of cavity and is rotationally connected with rocking arm (5) first ends;
The round chamber (13) that capping (7) is positioned at rocking arm (5) first ends is located and is fixedlyed connected with the upper end of central shaft (3);
Capping (7) is provided with the promotion structure (12) of projection towards the one side of cavity, and described promotion structure (12) comprises the promotion separation structure; The quantity that promotes separation structure is that four and its shape and structure are the rotation symmetry;
Described asymmetric damping piece (6) is made by elastic material, and it is positioned at circular wall (13-1) and promotes between the separation structure; Spring sheet (10), its front end is connected with the rear portion of asymmetric damping piece (6), its rear end is connected with the promotion separation structure, and promptly asymmetric damping piece (6) realizes that with the promotion separation structure elasticity is connected by spring sheet (10);
Each asymmetric damping piece (6), its upper and lower end face are that plane, its front portion are major part for microcephaly, rear portion, and its side outwardly is a circular arc and identical with the shape of circular wall (13-1), and its side inwardly is the arc of depression; Each promotes separation structure, and adjacent with asymmetric damping piece (6) is the arc that protrudes towards outer side surface; Each promotes separation structure and all offers backer's structure of slotted eye being installed and being equipped with projection;
Each spring sheet (10), it is the shape of bending, and its rear and low part is inserted in to be installed in the slotted eye, and its front upper part is positioned at the front side of backer's structure and offsets with the rear elastic of asymmetric damping piece (6).
2. the novel belt stretcher of a kind of motor car engine according to claim 1, it is characterized in that: described central shaft (3), its axis place is a hollow-core construction.
3. the novel belt stretcher of a kind of motor car engine according to claim 1 is characterized in that:
The outer end of described torsion spring (2) is connected with base (1), and its connection is meant fixedly connected or is meant that the elbow structure formula connects; Described elbow structure formula connects the outer end that refers to torsion spring (2) and is fabricated on elbow-shaped, the base (1) structure that snaps in that can snap in elbow is set, and the outer end of elbow-shaped packs into and snaps in structure;
The inner end of described torsion spring (2) is connected with first end of rocking arm (5), and its connection is meant fixedly connected or is meant that the elbow structure formula connects; Described elbow structure formula connects and refers to that the inner end of torsion spring (2) is fabricated to elbow-shaped, and first end of rocking arm (5) is provided with the structure that snaps in that can snap in elbow, and the inner end of torsion spring (2) elbow-shaped packs into snapping in the structure of rocking arm (5).
4. the novel belt stretcher of a kind of motor car engine according to claim 1, it is characterized in that: described belt stretcher has comprised at interval and the interlayer sheet (4) of the effect of reducing wear, it is arranged between torsion spring (2) and the rocking arm (5), and all rotation contacts with rocking arm (5) with torsion spring (2).
5. the novel belt stretcher of a kind of motor car engine according to claim 1, it is characterized in that: described limit structure is the first projection piece (5-1) to be set on the rocking arm (5), the second projection piece (1-1) and the 3rd projection piece (1-2) are set on base (1); Three projection pieces on the same circular arc line and the first projection piece (5-1) be arranged between other two projection pieces, under the situation that Idle wheel (9) is not under pressure, the first projection piece (5-1) touches with second projection piece (1-1) butt, be subjected under the situation of normal pressure at Idle wheel (9), the first projection piece (5-1) is positioned at the middle position of the second projection piece (1-1) and the 3rd projection piece (1-2), be subjected under the situation of super large pressure at Idle wheel (9), the first projection piece (5-1) touches with second projection piece (1-1) butt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200745606U CN201531571U (en) | 2009-09-28 | 2009-09-28 | Novel belt tensioning device of automobile engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200745606U CN201531571U (en) | 2009-09-28 | 2009-09-28 | Novel belt tensioning device of automobile engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201531571U true CN201531571U (en) | 2010-07-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200745606U Expired - Fee Related CN201531571U (en) | 2009-09-28 | 2009-09-28 | Novel belt tensioning device of automobile engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201531571U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012030464A1 (en) * | 2010-09-02 | 2012-03-08 | Dayco Products, Llc | Tensioner with expanding spring for radial frictional asymmetric damping |
| US8617013B2 (en) | 2010-09-02 | 2013-12-31 | Dayco Ip Holdings, Llc | Tensioner with expanding spring for radial frictional asymmetric damping |
| CN104005843A (en) * | 2013-02-26 | 2014-08-27 | 通用汽车环球科技运作有限责任公司 | Engine accessory mount for improved stretch belt installation |
| CN104048006A (en) * | 2014-06-03 | 2014-09-17 | 上海贝尼汽车科技有限公司 | Damping device for tensioner and damping equipment for tensioner |
-
2009
- 2009-09-28 CN CN2009200745606U patent/CN201531571U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012030464A1 (en) * | 2010-09-02 | 2012-03-08 | Dayco Products, Llc | Tensioner with expanding spring for radial frictional asymmetric damping |
| JP2013536929A (en) * | 2010-09-02 | 2013-09-26 | デイコ アイピー ホールディングス，エルエルシー | Tensioner with extension spring for asymmetric radial friction damper action |
| US8545352B2 (en) | 2010-09-02 | 2013-10-01 | Dayco Ip Holdings, Llc | Tensioner with expanding spring for radial frictional asymmetric damping |
| US8617013B2 (en) | 2010-09-02 | 2013-12-31 | Dayco Ip Holdings, Llc | Tensioner with expanding spring for radial frictional asymmetric damping |
| CN104005843A (en) * | 2013-02-26 | 2014-08-27 | 通用汽车环球科技运作有限责任公司 | Engine accessory mount for improved stretch belt installation |
| CN104048006A (en) * | 2014-06-03 | 2014-09-17 | 上海贝尼汽车科技有限公司 | Damping device for tensioner and damping equipment for tensioner |
| CN104048006B (en) * | 2014-06-03 | 2018-03-27 | 上海贝序汽车科技有限公司 | A kind of damping unit for being used in stretcher and a kind of damping device for being used in stretcher |
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Granted publication date: 20100721 Termination date: 20110928 |