CN103375553B - Stretcher core body and there is stretcher and the commutator of this core body - Google Patents
Stretcher core body and there is stretcher and the commutator of this core body Download PDFInfo
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- CN103375553B CN103375553B CN201210121606.1A CN201210121606A CN103375553B CN 103375553 B CN103375553 B CN 103375553B CN 201210121606 A CN201210121606 A CN 201210121606A CN 103375553 B CN103375553 B CN 103375553B
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Abstract
A kind of stretcher core body, be arranged on housing, described stretcher core body comprises: plunger, intercalation slidably in the plunger reception hole of housing and its one end extend from plunger reception hole, described plunger has the hollow portion of cylindric opening towards plunger reception hole longitudinal direction; First spring, stretches out plunger reception hole direction to described plunger and exerts a force to plunger in the hollow portion that described plunger is stretched in one end; Described stretcher core body also comprises: adjusting nut, and be positioned at one end of extending from plunger reception hole away from plunger of plunger reception hole, described adjusting nut is threaded with plunger reception hole; Supporting sleeve, one end is stretched into the hollow portion of described plunger and is pressed on the other end of the first spring in advance, and the other end of supporting sleeve supports described adjusting nut.The hydraulic fluid chamber with oil pressure of a sealing is formed between the hollow portion of described supporting sleeve and described plunger.Stretcher core body superior performance of the present invention, can meet the job requirement of annular flexible component very well.
Description
Technical field
The present invention relates to a kind of stretcher putting on transmission annular flexible component, to keep annular flexible member at certain tensioning state.
Background technique
At present, the reducing gear that electric booster steering device (REPS) often adopts is toothed belt transmission, and primarily of motor, small pulley, Timing Belt, the large component such as belt wheel and ball screw pair composition, driven by motor small pulley rotates, by toothed belt transmission, for commutator provides power-assisted.Above-mentioned reducing gear adopts toothed belt transmission, require higher to the processing of component and assembly precision, toothed belt transmission is comparatively strict to its mounting center distance, centre distance is less than normal, cause Timing Belt tension force less than normal, produce during V belt translation and loosen or skidding, affect transmission efficiency and produce abnormal sound, affecting reliability and the travelling comfort of motor turning; Centre distance is bigger than normal, causes Timing Belt over-tension, causes Timing Belt to assemble difficulty, and affects the working life of Timing Belt and belt wheel; And reducing gear may occur extremely to cause Timing Belt to produce vibration at work.Therefore need stretcher to limit Timing Belt, suppress the vibration produced during Timing Belt work, and maintain suitable tension force.Stretcher has a variety of, but its effect is all in order to the annular flexible components such as Timing Belt can work normally, the patent No. be ZL200710308143.9 patent discloses a kind of hydraulic tensioner, as shown in Figure 1, the plunger 120 of this stretcher 100 is intercalated in the plunger reception hole 111 of housing 110 sliding freely, plunger 120 is formed with the cylindric hollow portion 121 of one end open, along plunger reception hole 111 and cylindric hollow portion 121, storage is to the plunger force spring 130 stretching out direction and exert a force to plunger 120, and check valve assembly 140 is set in the hyperbaric chamber R that the cylinder hollow portion 121 by plunger reception hole 111 and plunger 120 is formed, described check valve assembly 140 comprises ball seat 141, the unidirectional valve ball 142 opposed with ball seat 141, to ball seat 141, unidirectional valve ball 142 is pushed to the ball force spring 143 of force, support the mitriform holder 144 of this ball force spring 143, described mitriform holder 144 is provided with the slit S forming oil each other and guide, the oil circuit of described ball seat 141 carries out by described oily guiding slit S the oil that described in supply, hyperbaric chamber R inner high voltage oil is revealed to outside via the slip peripheral wall surfaces of plunger reception hole 111 in the R of hyperbaric chamber, the stretcher vibration damping structure of this kind of structure is single, cannot effectively to the damping effect of high vibration under line belt non-normal working.
Summary of the invention
First object of the present invention be solve stretcher can not to the problem of effective vibration damping during high vibration under annular flexible component non-normal working, a kind of structure of ad hoc meter is simple, the stretcher core body that can successfully manage annular flexible component high vibration.
A kind of stretcher core body of the present invention, be arranged on housing, described stretcher core body comprises: plunger, intercalation sliding freely in the plunger reception hole of housing and its one end extend from plunger reception hole, described plunger has the hollow portion of cylindric opening towards plunger reception hole longitudinal direction; First spring, stretches out plunger reception hole direction to described plunger and exerts a force to plunger in the hollow portion that described plunger is stretched in one end; Described stretcher core body also comprises: supporting sleeve, the bottom of the plunger reception hole of housing is supported by the first spring supporting, form the hydraulic fluid chamber that has oil pressure between the hollow portion of described supporting sleeve and described plunger, and described supporting sleeve has first through hole be connected with hydraulic fluid chamber; Pressure regulating cover, is tightly connected with supporting sleeve between the bottom of the plunger reception hole of supporting sleeve and housing, described pressure regulating cover be formed one be connected with the first through hole of supporting sleeve and there is the pressure regulating cavity of resiliently deformable effect.
Through improving further, between described hydraulic fluid chamber and the pressure regulating cover of pressure regulating cover, form the hydraulic oil accommodating chamber that has sealing.
Through improving further, described supporting sleeve is formed with the extension part extended plunger force direction towards the first spring, and described extension part and described hollow portion are sealed and matched and can slide in opposite hollow portion.
Through improving further, described supporting sleeve is arranged with the seal ring for the fitting surface between sealed plunger and supporting sleeve.
Through improving further, described stretcher core body also comprises one and is set in seal snap ring on described pressure regulating cover, and described pressure regulating cover is tightly connected by seal snap ring and supporting sleeve.
Through improving further, described seal snap ring has support end, and described supporting sleeve supports the bottom of the plunger reception hole of housing by the support end of seal snap ring.
Through improving further, the axis of the first through hole of described supporting sleeve and the dead in line of plunger, positive corresponding described first through hole of pressure regulating cavity of described pressure regulating cover.
Through improving further, described stretcher core body also comprises the outer sliding sleeve, inner sliding sleeve and the second spring that are arranged in hydraulic fluid chamber, described inner sliding sleeve supports described supporting sleeve by the second spring supporting on described outer sliding sleeve, one end away from inner sliding sleeve of described outer sliding sleeve is supported on plunger, and described outer sliding sleeve can with plunger motion under the support force of plunger and the elastic force effect of the second spring.
Through improving further, described outer sliding sleeve comprises bottom first sidepiece and first of formation one first cavity, described inner sliding sleeve comprises bottom second sidepiece and second of formation one second cavity, described inner sliding sleeve second bottom to stretch in the first cavity of outer sliding sleeve and be pressed on described second spring in advance, described second spring be positioned at the first cavity of outer sliding sleeve and bottom first of precompressed outer sliding sleeve on, second sidepiece of described inner sliding sleeve is supported described supporting sleeve and is slidably matched with the first sidepiece of outer sliding sleeve, and the first bottom support of described outer sliding sleeve is on plunger.
Through improving further, the second sidepiece of described inner sliding sleeve is provided with at least one by-pass hole.
Through improving further, described inner sliding sleeve second bottom be provided with the second through hole of the second cavity of a connection inner sliding sleeve and the first cavity of outer sliding sleeve.
Through improving further, described stretcher core body also comprises the valve ball be located in the second cavity of inner sliding sleeve, 3rd spring, 4th spring, 5th spring and spring seat, described spring seat is pressed in advance between the 4th spring and the 5th spring and with the second sidepiece of inner sliding sleeve and is slidably matched, one end away from spring seat of described 4th spring and the 5th spring support respectively supporting sleeve and inner sliding sleeve second bottom, described spring seat is provided with valve port, described valve ball by opening and closing the valve port of spring seat on the 3rd spring supporting is bottom second of inner sliding sleeve under the effect of oil pressure and spring force.
Through improving further, described supporting sleeve is formed with the extension part extended in the hollow portion of described plunger, is formed with gap between the first sidepiece of described outer sliding sleeve and described extension part.
Through improving further, described supporting sleeve is arranged with the seal ring for the fitting surface between sealed plunger and supporting sleeve.
Through improving further, described plunger is arranged with the seal ring for the fitting surface between sealed plunger and plunger reception hole.
Through improving further, being provided with from one end that plunger reception hole extends of described plunger one can the roller of rotation.
Known by the technological scheme of stretcher core body of the present invention, stretcher core body is provided with supporting sleeve and adjustable cap, the hollow portion of supporting sleeve and plunger forms the hydraulic fluid chamber with oil pressure, and pressure regulating cover is tightly connected with supporting sleeve and be formed with the pressure regulating cavity with resiliently deformable effect be connected with hydraulic fluid chamber, like this, when the unexpected high vibration of annular flexible component, oil pressure is excessive, the capacity of pressure regulating cavity can be increased by the pressure regulating cavity resiliently deformable of pressure regulating cover, to hold more hydraulic oil, namely the effect of buffering energy-absorbing is played, thus greatly slackened the vibrational energy of annular flexible component.
Second object of the present invention provides a kind of stretcher, and described housing is provided with plunger reception hole, and described stretcher core body is stretcher core body of the present invention.
Known by the technological scheme of stretcher of the present invention, described stretcher has stretcher core body of the present invention, thus has the damping effect effectively to high vibration under line belt non-normal working.
3rd object of the present invention provides a kind of commutator, comprise for moment transmission driving wheel, follower and be enclosed within driving wheel and follower and make driving wheel and follower carry out the driving belt of moment transmission, described commutator also comprises the stretcher for keeping line belt tensioning state, and described stretcher is stretcher of the present invention.
Known by the technological scheme of commutator of the present invention, described commutator is provided with stretcher of the present invention, thus effectively can ensure that the line belt of commutator remains within the scope of the tensioning of defined, make line belt that vibration and abnormal sound not easily occur, substantially increase the service behaviour of commutator.
4th object of the present invention provides a kind of commutator, comprising housing, driving wheel, follower for moment transmission and being enclosed within driving wheel and follower makes driving wheel and follower carry out the driving belt of moment transmission, described commutator also comprises and being integrated on housing for keeping the stretcher core body of line belt tensioning state, described housing is provided with plunger reception hole, and described stretcher core body is stretcher core body of the present invention.
Known by the technological scheme of commutator of the present invention, the housing of described commutator is integrated with stretcher core body of the present invention, thus effectively can ensure that the line belt of commutator remains within the scope of the tensioning of defined, make line belt that vibration and abnormal sound not easily occur, substantially increase the service behaviour of commutator, stretcher core body is directly integrated on steering gear housing not only cost-saving simultaneously, and avoid stretcher core body is arranged on the stretcher with housing, stretcher is bolted on the error that steering gear housing brings, namely improve the stability keeping line belt tensioning state.
Accompanying drawing explanation
Fig. 1 is existing a kind of stretcher sectional view.
Fig. 2 is the sectional view of the first mode of execution of a kind of stretcher core body provided by the invention.
Fig. 3 is the sectional view of the second mode of execution of a kind of stretcher core body provided by the invention.
Fig. 4 is the sectional view of the third mode of execution of a kind of stretcher core body provided by the invention.
Fig. 5 is the sectional view of a kind of mode of execution of a kind of commutator provided by the invention.
Embodiment
In order to make technical problem solved by the invention, technological scheme and beneficial effect clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Fig. 2 is the sectional view of the first embodiment of a kind of stretcher core body of the present invention.This stretcher core body is arranged on housing 1, described stretcher core body comprises: plunger 2, intercalation slidably in the plunger reception hole 11 of housing 1 and its one end extend from plunger reception hole 11, described plunger 2 has the cylindric hollow portion 21 towards plunger reception hole 11 longitudinal direction; First spring a1, stretches out plunger reception hole direction to described plunger and exerts a force to plunger in the hollow portion that described plunger is stretched in one end; Described stretcher core body also comprises: supporting sleeve 4, supported by the first spring a1 and support the bottom of the plunger reception hole 11 of housing 1, form the hydraulic fluid chamber R that has oil pressure between described supporting sleeve 4 and the hollow portion 21 of described plunger 2, and described supporting sleeve 4 has first through hole 41 be connected with hydraulic fluid chamber R; Pressure regulating cover 5, is tightly connected with supporting sleeve 4 between the bottom of the plunger reception hole 11 of supporting sleeve 4 and housing 1, described pressure regulating cover be formed one be connected with the first through hole 41 of supporting sleeve 4 and there is the pressure regulating cavity 51 of resiliently deformable effect.
Stretcher core body operationally, its plunger 2 is used for and annular flexible member contact from one end that plunger reception hole 11 extends, and to the certain precompression of annular flexible component, annular flexible component is at work because the factors such as working environment such as may to be beated at the unusual fluctuation, annular flexible component tension force changes, at this moment the power that therefore plunger 2 is subject to annular flexible component also changes thereupon, and the oil pressure in the first spring a1 and hydraulic fluid chamber R also changes to the power of plunger 2, when the power that plunger 2 is subject to annular flexible component diminishes, certain recovery is obtained gradually by the spring a that compresses and oil pressure, plunger 2 is made to move to the direction that plunger reception hole 11 extends to keep the precompression certain to annular flexible component, when the power that plunger 2 is subject to annular flexible component becomes large, plunger 2 runs back, namely stretch into further gradually in plunger reception hole 11, at this moment the hydraulic oil in the first spring a1 and hydraulic fluid chamber R is compressed, namely resistance is increased to overcome the power of annular flexible component to plunger 2, in a word, stretcher core body makes annular flexible component remain on certain tensioning state, namely the normal work of annular flexible member is kept.The stretcher core body of the present embodiment is provided with supporting sleeve 4 and adjustable cap 5, supporting sleeve 4 forms the hydraulic fluid chamber R with oil pressure with the hollow portion 21 of plunger 2, and pressure regulating cover 5 is tightly connected with supporting sleeve 4 and be formed with the pressure regulating cavity 51 with resiliently deformable effect be connected with hydraulic fluid chamber R, like this, when annular flexible component generation high vibration, oil pressure is excessive, the capacity of pressure regulating cavity 51 can be increased by pressure regulating cavity 51 resiliently deformable of pressure regulating cover 5, to hold more hydraulic oil, namely the effect of buffering energy-absorbing is played, thus greatly slackened the vibrational energy of annular flexible component, effectively inhibit the high vibration of annular flexible component.
Leakage fluid force feed is not easily there is in order to make stretcher core body, can be designed between described hydraulic fluid chamber R and the pressure regulating cover 51 of pressure regulating cover 5, form the hydraulic oil accommodating chamber that has sealing, described supporting sleeve 4 is formed with the extension part 42 extended plunger 2 force direction towards the first spring a1, and described extension part 42 is sealed and matched with described hollow portion 21 and can slides in opposite hollow portion 21.The extension part 42 of the present embodiment extends in the hollow portion 21 of described plunger, described extension part 42 is pressed on the first spring a1 in advance, such design not only structure is simple, and the sealing of hydraulic fluid chamber R can be kept well, other forms can certainly be designed to, as plunger 2 extend into the inner side of extension part 42, as long as ensure the sealing of plunger 2 and extension part 42 fitting surface like this.
And the seal ring c1 described supporting sleeve 4 of the present embodiment is arranged with for the fitting surface between sealed plunger 2 and supporting sleeve 4.
Institute's stretcher core body of the present embodiment also comprises one and is set in seal snap ring 6 on described pressure regulating cover 5, and described pressure regulating cover 5 is tightly connected by seal snap ring 6 and supporting sleeve 4.Pressure regulating cover 5 is connected with supporting sleeve 4 by seal snap ring 6, the sealing effect that both can play, also can prevent pressure regulating cover 5 from getting loose, by direct for pressure regulating cover sulfuration on supporting sleeve 4, can certainly can play better sealing effect, also can prevent pressure regulating cover 5 from getting loose, also or first by pressure regulating cover sulfuration on supporting sleeve 4, and then fit on seal snap ring 6, not only sealing effect is better, also can prevent pressure regulating cover 5 from getting loose better.
And the seal snap ring 6 of the present embodiment has support end 61, described supporting sleeve 4 supports the bottom of plunger reception hole 11 by the support end 61 of seal snap ring 6.Such design can make seal snap ring 6 when pressure regulating cover 5 is subject to the impact force distortion of hydraulic oil, and seal snap ring 6 can not get loose, thus the possibility that therefore pressure regulating cover 5 also can not get loose.
In order to make system stress balance, the axis of the first through hole 41 of the described supporting sleeve 4 of the present embodiment and the dead in line of plunger 2, positive corresponding described first through hole 41 of pressure regulating cavity 51 of described pressure regulating cover 5.
The described plunger 2 of the present embodiment is in addition arranged with the seal ring c2 for the fitting surface between sealed plunger 2 and plunger reception hole 11.
In order to reduce the adverse effect to annular flexible component rotation work, being provided with from one end that plunger reception hole 11 extends of the described plunger 2 of the present embodiment one can the roller 22 of rotation, to reduce the frictional force to annular flexible component, thus make annular flexible component rotation work more smoothly.
Fig. 3 is the sectional view of the third embodiment of a kind of stretcher core body of the present invention, described stretcher core body is except having the component described in the second embodiment, described stretcher core body also comprises the outer sliding sleeve 7, inner sliding sleeve 8 and the second spring a2 that are arranged in hydraulic fluid chamber R, described inner sliding sleeve 8 to be supported on described outer sliding sleeve 7 by the second spring a2 and to support described supporting sleeve 4, one end away from inner sliding sleeve 8 of described outer sliding sleeve 7 is supported on plunger 2, and described outer sliding sleeve 7 can move with plunger 2 under the support force of plunger 2 and the elastic force effect of the second spring a2.The stretcher core body of the present embodiment is except the effect had in embodiment two, also there is the tension effects better to the annular flexible component of strenuous exercise, plunger 2 axially moves reciprocatingly along plunger reception hole 11 by the active force of the change of annular flexible member force and oil pressure, the first spring a1, and the part in the variable quantity of the vibration force of annular flexible component can be overcome by the second spring a2, thus annular flexible component Oscillation Amplitude is reduced further, more restrained effectively the vibration of annular flexible component.
And the described outer sliding sleeve 7 of the present embodiment comprise formation one first cavity 71 the first sidepiece 72 and first bottom 73, bottom the second sidepiece 82 and second that described inner sliding sleeve 8 comprises formation one second cavity 81 83, described inner sliding sleeve 8 second bottom 83 to stretch in the first cavity 71 of outer sliding sleeve 7 and to be pressed on described second spring a2 in advance, described second spring a2 is positioned at the first cavity 71 of outer sliding sleeve 7 and bottom first of precompressed outer sliding sleeve 7 on 73, second sidepiece 82 of described inner sliding sleeve is supported described supporting sleeve 4 and is slidably matched with the first sidepiece 72 of outer sliding sleeve 7, described outer sliding sleeve 7 first bottom 73 to be supported on plunger 2.When such outer sliding sleeve 7 moves to supporting sleeve 4 direction with plunger 2, outer sliding sleeve 7 compress the first cavity 71 of outer sliding sleeve and inner sliding sleeve 8 second bottom the space that formed between 83, the hydraulic oil namely in this space is compressed energy-absorbing, also can play certain damping effect.And the present embodiment is provided with the second through hole 831 of the second cavity 81 of a connection inner sliding sleeve 8 and the first cavity 71 of outer sliding sleeve 7 on 83 bottom second of described inner sliding sleeve, when hydraulic oil bottom second of the first cavity 71 of outer sliding sleeve and inner sliding sleeve 8 between 83 is compressed, a part flows in the second cavity 81 of inner sliding sleeve 8 by the second through hole 831, because the hydraulic oil in this space can only flow in the second cavity 81 of inner sliding sleeve 8 by the second through hole 831, so hydraulic oil is obstructed and slows down when flowing through the second through hole 831, when in like manner returning, hydraulic oil is obstructed equally and slows down, finally can play certain effectiveness in vibration suppression to annular flexible component.
In addition, gap b is formed with between the first sidepiece 72 of the described outer sliding sleeve 7 of the present embodiment and described extension part 42.When such hydraulic oil comes and goes gap b, all owing to being obstructed by energy-absorbing, to reach the effect of further energy-absorbing, thus also play certain effectiveness in vibration suppression to annular flexible component.
In order to make the running of hydraulic power oil in hydraulic fluid chamber R, there is more alleviation effects, the present embodiment is provided with at least one by-pass hole 821 on the second sidepiece 82 of described inner sliding sleeve 8, be connected with outside the second cavity 81 to make the second cavity 81 of inner sliding sleeve 8, the hydraulic oil outside the hydraulic oil in the second cavity 81 and the second cavity 81 can be made to interact and energy-absorbing, to slow down the flow velocity of hydraulic oil, time running of hydraulic power oil more relax, thus also illustrate there is certain effectiveness in vibration suppression to annular flexible component.
Fig. 4 is the sectional view of the third embodiment of a kind of stretcher core body of the present invention, described stretcher core body is except having the component described in the third embodiment, stretcher core body also comprises the valve ball 9 be located in the second cavity 81 of inner sliding sleeve 8, 3rd spring a3, 4th spring a4, 5th spring a5 and spring seat 10, described spring seat 10 is pressed in advance between the 4th spring a4 and the 5th spring a5 and with the second sidepiece 82 of inner sliding sleeve 8 and is slidably matched, one end away from spring seat 10 of described 4th spring a4 and the 5th spring a5 support respectively supporting sleeve 4 and inner sliding sleeve 8 second bottom 83, described spring seat 10 is provided with valve port, and (valve port is the part overlapping with valve ball in diagram, do not indicate in figure), described valve ball 9 by the 3rd spring a3 be supported on inner sliding sleeve second bottom can open and close the valve port of spring seat 10 on 83 under the effect of oil pressure and spring force.The stretcher core body of the present embodiment is except the effect had in embodiment two, also have better under high rotary speed working environment and Oscillation Amplitude requires the tension effects of less annular flexible component, annular flexible component is in the process of running up, it is higher and in the vibration processes that amplitude is larger that it is in vibration frequency always, and the spring seat 10 of the stretcher core body of the present embodiment and valve ball 9 in the second cavity 81 of inner sliding sleeve with the effect to-and-fro motion of oil pressure and spring force, because annular flexible component vibration frequency is higher, spring seat 10 and valve ball 9 just change in vibration force in a direction movement process and when also not stopping, namely spring seat 10 is relative with the vibration force direction that spring seat 10 and valve ball 9 are subject to annular flexible component with the direction that valve ball 9 moves, thus due to interaction energy absorbing vibrational energy greatly, and when to the motion of supporting sleeve 4 direction, compression hydraulic oil pocket R makes oil pressure excessive to plunger 2, the active force of oil pressure counter the 3rd spring a3 can make valve ball 9 open the valve port of spring seat 10, make the balance that the oil pressure of hydraulic oil everywhere keeps certain.
The embodiment of a kind of stretcher of the present invention, stretcher comprises housing and stretcher core body, and described housing establishes plunger reception hole, and described stretcher core body can be the stretcher core body described in above-mentioned any embodiment.Like this because the stretcher of the present embodiment has the stretcher core body described in above-described embodiment, thus also there is the beneficial effect described in above-described embodiment.
The embodiment of a kind of commutator of the present invention, commutator comprise for moment transmission driving wheel, follower and be enclosed within driving wheel and follower and make driving wheel and follower carry out the driving belt of moment transmission, described commutator also comprises the stretcher for keeping line belt tensioning state, and described stretcher is the stretcher described in above-described embodiment.Therefore the commutator of the present embodiment at work its line belt not easily there are the abnormal conditions such as abnormal sound, skidding, thus improve the service behaviour of commutator.
Fig. 5 is the another kind of embodiment of a kind of commutator of the present invention, this commutator comprises housing d4, for the driving wheel d1 that moment is transmitted, follower d2 and be enclosed within driving wheel d1 and follower d2 and make driving wheel d1 and follower d2 carry out the driving belt d3 of moment transmission, described commutator also comprises and being integrated on housing d4 for keeping the stretcher core body e of line belt tensioning state, described stretcher core body e can be the stretcher core body described in above-mentioned any embodiment, described housing d4 is provided with plunger reception hole 11, the stretcher core body e of the commutator of the present embodiment is the stretcher core body described in above-mentioned 4th kind of stretcher core body embodiment, the housing d4 of described commutator is integrated with the stretcher core body described in above-described embodiment, thus effectively can ensure that the line belt d3 of commutator remains within the scope of the tensioning of defined, make line belt d3 that vibration and abnormal sound not easily occur, substantially increase the service behaviour of commutator, stretcher core body e is directly integrated on the housing d4 of commutator simultaneously, not only cost-saving, and avoid stretcher core body is arranged on the stretcher with housing, stretcher is bolted on the error that steering gear housing brings, namely improve the stability and reliability that keep line belt tensioning state.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (19)
1. a stretcher core body, be arranged on housing (1), described stretcher core body comprises: plunger (2), intercalation sliding freely in the plunger reception hole (11) of housing (1) and its one end extend from plunger reception hole (11), described plunger (2) has the hollow portion (21) of cylindric opening towards plunger reception hole (11) longitudinal direction; First spring (a1), stretches out plunger reception hole (11) direction to described plunger (2) and exerts a force to plunger (2) in the hollow portion (21) that described plunger (2) are stretched in one end; It is characterized in that:
Described stretcher core body also comprises: supporting sleeve (4), supported by the first spring (a1) and support the bottom of the plunger reception hole (11) of housing (1), form the hydraulic fluid chamber (R) that has oil pressure between the hollow portion (21) of described supporting sleeve (4) and described plunger (2), and described supporting sleeve (4) has first through hole (41) be connected with hydraulic fluid chamber (R); Pressure regulating cover (5), be tightly connected with supporting sleeve (4) between the bottom being positioned at the plunger reception hole (11) of supporting sleeve (4) and housing (1), described pressure regulating cover be formed one be connected with first through hole (41) of supporting sleeve (4) and there is the pressure regulating cavity (51) of resiliently deformable effect.
2. a kind of stretcher core body according to claim 1, is characterized in that: form the hydraulic oil accommodating chamber that has sealing between the pressure regulating cavity (51) of described hydraulic fluid chamber (R) and pressure regulating cover (5).
3. a kind of stretcher core body according to claim 2, it is characterized in that: described supporting sleeve (4) is formed with the extension part (42) extended plunger (2) force direction towards the first spring (a1), described extension part (42) and described hollow portion (21) are sealed and matched and can slide in opposite hollow portion (21).
4. a kind of stretcher core body according to claim 3, is characterized in that: described supporting sleeve (4) is arranged with the seal ring (c1) for the fitting surface between sealed plunger (2) and supporting sleeve (4).
5. a kind of stretcher core body according to claim 1, it is characterized in that: described stretcher core body also comprises one and is set in seal snap ring (6) on described pressure regulating cover (5), and described pressure regulating cover (5) is tightly connected by seal snap ring (6) and supporting sleeve (4).
6. a kind of stretcher core body according to claim 5, it is characterized in that: described seal snap ring (6) has support end (61), described supporting sleeve (4) supports the bottom of the plunger reception hole (11) of housing (1) by the support end (61) of seal snap ring (6).
7. a kind of stretcher core body according to claim 1, it is characterized in that: the axis of first through hole (41) of described supporting sleeve (4) and the dead in line of plunger (2), positive corresponding described first through hole (41) of pressure regulating cavity (51) of described pressure regulating cover (5).
8. a kind of stretcher core body according to claim 1, it is characterized in that: described stretcher core body also comprises the outer sliding sleeve (7) being arranged in hydraulic fluid chamber (R), inner sliding sleeve (8) and the second spring (a2), described inner sliding sleeve (8) is supported on described outer sliding sleeve (7) by the second spring (a2) and goes up and support described supporting sleeve (4), one end away from inner sliding sleeve (8) of described outer sliding sleeve (7) is supported on plunger (2), and described outer sliding sleeve (7) can move with plunger (2) under the support force of plunger (2) and the elastic force effect of the second spring (a2).
9. a kind of stretcher core body according to claim 8, it is characterized in that: bottom the first sidepiece (72) and first that described outer sliding sleeve (7) comprises formation one first cavity (71) (73), bottom the second sidepiece (82) and second that described inner sliding sleeve (8) comprises formation one second cavity (81) (83), described inner sliding sleeve (8) second bottom (83) to stretch in first cavity (71) of outer sliding sleeve (7) and to be pressed on described second spring (a2) in advance, described second spring (a2) is positioned at first cavity (71) of outer sliding sleeve (7) and bottom first of precompressed outer sliding sleeve (7) on (73), second sidepiece (82) of described inner sliding sleeve is supported described supporting sleeve (4) and is slidably matched with first sidepiece (72) of outer sliding sleeve (7), described outer sliding sleeve (7) first bottom (73) be supported on plunger (2).
10. a kind of stretcher core body according to claim 9, is characterized in that: second sidepiece (82) of described inner sliding sleeve (8) is provided with at least one by-pass hole (821).
11. a kind of stretcher core bodys according to claim 9, is characterized in that: described inner sliding sleeve second bottom (83) be provided with second through hole (831) of second cavity (81) of a connection inner sliding sleeve (8) and first cavity (71) of outer sliding sleeve (7).
12. a kind of stretcher core bodys according to claim 11, it is characterized in that: described stretcher core body also comprises the valve ball (9) be located in second cavity (81) of inner sliding sleeve (8), 3rd spring (a3), 4th spring (a4), 5th spring (a5) and spring seat (10), described spring seat (10) is pressed in advance between the 4th spring (a4) and the 5th spring (a5) and with second sidepiece (82) of inner sliding sleeve (8) and is slidably matched, one end away from spring seat (10) of described 4th spring (a4) and the 5th spring (a5) support respectively supporting sleeve (4) and inner sliding sleeve (8) second bottom (83), described spring seat (10) is provided with valve port, described valve ball (9) by the 3rd spring (a3) be supported on inner sliding sleeve second bottom (83) upper and the valve port of spring seat (10) can be opened and closed under the effect of oil pressure and spring force.
13. a kind of stretcher core bodys according to claim 9, it is characterized in that: described supporting sleeve (4) is formed with the extension part (42) extended in the hollow portion (21) of described plunger, is formed with gap (b) between first sidepiece (72) of described outer sliding sleeve (7) and described extension part (42).
14. a kind of stretcher core bodys according to claim 1, is characterized in that: described supporting sleeve (4) is arranged with the seal ring (c1) for the fitting surface between sealed plunger (2) and supporting sleeve (4).
15. a kind of stretcher core bodys according to claim 1, is characterized in that: described plunger (2) is arranged with the seal ring (c2) for the fitting surface between sealed plunger (2) and plunger reception hole (11).
16. a kind of stretcher core bodys according to claim 1, is characterized in that: being provided with from one end that plunger reception hole (11) extends of described plunger (2) one can the roller (22) of rotation.
17. 1 kinds of stretchers, comprise housing and stretcher core body, it is characterized in that: described housing is provided with plunger reception hole, the stretcher core body of described stretcher core body any one of claim 1 to claim 16 described in claim.
18. 1 kinds of commutators, comprise for moment transmission driving wheel, follower and be enclosed within driving wheel and follower and make driving wheel and follower carry out the driving belt of moment transmission, it is characterized in that: described commutator also comprises the stretcher for keeping line belt tensioning state, described stretcher is stretcher according to claim 17.
19. 1 kinds of commutators, the driving wheel (d1), the follower (d2) that comprise housing (d4), transmit for moment and be enclosed within driving wheel (d1) and follower (d2) and make driving wheel (d1) and follower (d2) carry out the driving belt (d3) of moment transmission, it is characterized in that: described commutator also comprises and being integrated on housing (d4) for keeping the stretcher core body of line belt tensioning state, described housing is provided with plunger reception hole, the stretcher core body of described stretcher core body any one of claim 1 to claim 16 described in claim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210121606.1A CN103375553B (en) | 2012-04-24 | 2012-04-24 | Stretcher core body and there is stretcher and the commutator of this core body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210121606.1A CN103375553B (en) | 2012-04-24 | 2012-04-24 | Stretcher core body and there is stretcher and the commutator of this core body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103375553A CN103375553A (en) | 2013-10-30 |
| CN103375553B true CN103375553B (en) | 2016-03-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210121606.1A Active CN103375553B (en) | 2012-04-24 | 2012-04-24 | Stretcher core body and there is stretcher and the commutator of this core body |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9765856B2 (en) * | 2015-09-01 | 2017-09-19 | GM Global Technology Operations LLC | Hydraulic chain tensioner with oil reservoir for inverted installations |
| CN107867324B (en) * | 2016-09-28 | 2019-11-08 | 比亚迪股份有限公司 | Motor pump assembly, steering system and vehicle |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5700213A (en) * | 1995-08-18 | 1997-12-23 | Borg-Warner Automotive, Inc. | Integral inlet and pressure relief valve for an automotive tensioner |
| CN1428523A (en) * | 2001-12-28 | 2003-07-09 | 博格沃纳·莫尔斯Tec日本株式会社 | Hydraulic tensioner with ratchet mechanism |
| CN1667297A (en) * | 2004-03-08 | 2005-09-14 | 株式会社椿本链索 | Hydraulic tensioner |
| CN102135162A (en) * | 2010-01-25 | 2011-07-27 | 谢夫勒科技有限两合公司 | Hydraulic tensioning element |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5311226B2 (en) * | 2009-07-14 | 2013-10-09 | Ｎｔｎ株式会社 | Auto tensioner |
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2012
- 2012-04-24 CN CN201210121606.1A patent/CN103375553B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5700213A (en) * | 1995-08-18 | 1997-12-23 | Borg-Warner Automotive, Inc. | Integral inlet and pressure relief valve for an automotive tensioner |
| CN1428523A (en) * | 2001-12-28 | 2003-07-09 | 博格沃纳·莫尔斯Tec日本株式会社 | Hydraulic tensioner with ratchet mechanism |
| CN1667297A (en) * | 2004-03-08 | 2005-09-14 | 株式会社椿本链索 | Hydraulic tensioner |
| CN102135162A (en) * | 2010-01-25 | 2011-07-27 | 谢夫勒科技有限两合公司 | Hydraulic tensioning element |
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| CN103375553A (en) | 2013-10-30 |
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