CN210680393U - Damping force adjustable suspension type electronic accelerator pedal with hysteresis effect - Google Patents
Damping force adjustable suspension type electronic accelerator pedal with hysteresis effect Download PDFInfo
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- CN210680393U CN210680393U CN201921191458.4U CN201921191458U CN210680393U CN 210680393 U CN210680393 U CN 210680393U CN 201921191458 U CN201921191458 U CN 201921191458U CN 210680393 U CN210680393 U CN 210680393U
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Abstract
The utility model discloses a damping force adjustable suspension type electronic accelerator pedal with hysteresis effect, including pedal connecting rod, base, its characterized in that, the front end of pedal connecting rod stretches into the base inner chamber and is connected with the base is articulated through the sensor axle, is equipped with slider installation cavity and first spring mounting boss on the pedal connecting rod, is equipped with two sliders about the slider installation cavity, and two sliders are connected through the pressure spring, and two sliders about the left and right sides of pressure spring placing cavity stretch out respectively under the spring action of pressure spring and are connected with the both sides face sliding friction of base inner chamber, and the pressure spring is in the compression state all the time; the pedal connecting rod rotates around the sensor shaft to drive the two sliding blocks to slide up and down in the inner cavity of the base to generate damping force. The accelerator pedal can produce a continuous and stable hysteresis effect in the driving process, so that signals are stably output, driving comfort is improved while consumption and emission are reduced, and fatigue of feet of a driver is reduced.
Description
Technical Field
The utility model relates to an automobile manufacturing technical field, concretely relates to damping force adjustable suspension type electronic accelerator pedal with hysteresis effect.
Background
The electronic accelerator pedal accurately controls the opening of the throttle valve by outputting an electric signal, and the instability of the electric signal can cause the instability of the opening of the throttle valve, so that the rotation speed of an engine is suddenly increased or decreased to cause poor fuel combustion, thereby increasing the fuel consumption and the emission. The method can make the fuel burn more fully and thoroughly by accurately controlling the air intake of the engine, and is one of effective methods for reducing the exhaust emission of the motor vehicle.
Today, the economy and science and technology are continuously developed, the modeling and horsepower of the automobile is continuously improved, and the requirement on driving comfort is higher and higher. The position of an accelerator pedal is controlled by feet of a person in the driving process of an automobile, when the automobile runs on a bumpy road, the position of the pedal is difficult to keep stable, the stability of an electric signal output by the pedal is directly influenced, great inconvenience is caused to driving of the automobile, meanwhile, the driving fatigue of a driver is increased, and the riding comfort is influenced.
The electronic accelerator pedal is used as a carrier for accelerating and decelerating the vehicle, if the electronic accelerator pedal is provided with a hysteresis generating mechanism, a driver can well control the position of the pedal, a stable hysteresis effect is always kept in the driving process, signals are stably output, the driving comfort is improved while the consumption and the emission are reduced, the fatigue feeling of feet of the driver is reduced, the driving safety is indirectly improved, and traffic accidents are reduced.
The hysteresis mechanism of the existing suspension type electronic accelerator pedal is composed of a pedal connecting rod, a base, a reset spring, a spring mounting boss and a left sliding block and a right sliding block, wherein a sliding block mounting cavity is arranged at the front end of the pedal connecting rod, the sliding block mounting cavity is provided with openings on the left side, the right side and the upper side, the left sliding block and the right sliding block are respectively arranged in the sliding block mounting cavity, the sliding blocks extend out of the left opening and the right opening to be in contact with the two side walls of the inner cavity of the base, the spring mounting boss is arranged in the upper opening of the sliding block. The reset spring is in a compressed state in an initial state, two inclined planes at the lower end of the reset pressure spring mounting boss extrude the two sliding blocks to enable the two sliding blocks to be in contact with two side walls of the inner cavity of the base, and the sliding blocks move on the friction surface of the base along with the rotation of the pedal and generate friction damping force with the base. In the positive stroke, the return spring is continuously compressed, the spring force is increased, the contact pressure between the left and right sliding blocks and the friction surface of the base is increased, and the generated friction damping force is also increased. During the return stroke, the frictional damping force is continuously reduced. The damping force generated by the existing hysteresis mechanism cannot be determined by calculation, the damping force is constantly changed, the output signal is unstable, and a driver cannot stably control the accelerator pedal.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a damping force adjustable suspension type electronic accelerator pedal with hysteresis effect can provide and last reliable big or small adjustable damping force, produces stable hysteresis effect at the driving in-process, makes things convenient for the driver to control the footboard position well, improves the driving comfort when consumption reduction and emission reduction.
Therefore, the utility model discloses a technical scheme is:
a suspension type electronic accelerator pedal with hysteresis effect comprises a pedal connecting rod and a base, and is characterized in that the front end of the pedal connecting rod extends into an inner cavity of the base and is hinged with the base through a sensor shaft, a slider mounting cavity and a first spring mounting boss are arranged on the pedal connecting rod positioned on the front side of the sensor shaft, a left slider and a right slider are arranged in the slider mounting cavity and are connected through a pressure spring, the left slider and the right slider extend out of the left side and the right side of a pressure spring placing cavity respectively under the elastic action of the pressure spring and are in sliding friction connection with two side faces of the inner cavity of the base, and the pressure spring is always in a compression state; a return spring is arranged in the first spring mounting boss, the lower end of the return spring abuts against the pedal connecting rod, and the upper end of the return spring abuts against the top surface of the inner cavity of the base; the pedal connecting rod rotates around the sensor shaft to drive the two sliding blocks to slide up and down in the inner cavity of the base to generate damping force.
The purpose of the damping force is to enable a driver to stably control an accelerator pedal and maintain stable signal output. This application produces damping force through setting up two sliders that the pressure spring is connected and base inner chamber friction, and the spring force of pressure spring can preset according to customer's needs to adjust the damping force size between slider and the base.
Furthermore, two side surfaces of the inner cavity of the base are oppositely and inwards obliquely arranged. The preferred angle of inclination θ is 87 ° to 90 °.
As the pedal is depressed from the idle position, the loading force is gradually increased, and the damping force needs to be continuously increased to maintain a good hysteresis effect. If the damping force is kept unchanged, the ratio of the damping force to the loading force is smaller in the tail end stroke of the pedal movement, and the hysteresis effect is poor. When the friction inclined plane arranged obliquely enables the sliding block to slide upwards, the positive pressure is gradually increased, the friction damping is continuously increased, and the change rate of the damping force can be realized by adjusting the inclined angle.
Further, the slider is made of a POM wear resistant material. POM (polyformaldehyde crystal) is a thermoplastic engineering plastic with high hardness and high crystallinity, and has high strength and good wear resistance;
furthermore, the reset spring is a double-spiral cylindrical spring, a second spring mounting boss is arranged on the inner side face of the top face of the inner cavity of the base, the first spring mounting boss and the second spring mounting boss are formed by an inner boss and an outer boss, the inner boss is matched with an inner spring of the double-spiral cylindrical spring, the outer boss is matched with an outer spring of the double-spiral cylindrical spring, the lower end of the double-spiral cylindrical spring is mounted on the first spring mounting boss, and the upper end of the double-spiral cylindrical spring is mounted on the second spring mounting boss.
By adopting the technical scheme, the strength and the elastic supporting force of the reset spring can be improved by the design of the double-spiral cylindrical spring; the arrangement of the spring mounting boss can limit the displacement of the return spring in work.
Furthermore, the pedal connecting rod is connected with the sensor shaft in an interference fit mode through a shaft hole, and the sensor shaft is connected with the base in a clearance fit mode through the shaft hole. Furthermore, a long strip-shaped clamping groove is axially formed in the part, connected with the pedal connecting rod, of the sensor shaft, and rib positions matched with the clamping groove are arranged on the pedal connecting rod.
By adopting the technical scheme, the axial and radial movement of the sensor shaft can be limited after the sensor shaft is installed.
Furthermore, the sensor shaft is provided with four long grooves, wherein the width of one long groove is slightly larger than the widths of the other three long grooves; four rib positions are arranged in the through hole of the pedal connecting rod, the width of one rib position is slightly larger than the width of the other three rib positions, and the wide and long grooves are matched with the wide rib positions.
By adopting the technical scheme, errors in the installation direction of the sensor shaft can be prevented by arranging the rib positions and the clamping grooves with inconsistent widths.
Further, suspension type electronic accelerator pedal still includes the shield, and the shield is equipped with six buckles, is equipped with the draw-in groove around the base inner chamber under shed, draw-in groove and buckle interference fit. Simple structure, the cooperation is inseparable, can effectively prevent that the dust from getting into the friction surface of damping fin and influencing hysteresis power.
Furthermore, a pressure spring mounting groove is formed in the bottom surface of the sliding block, a pressure spring is mounted in the pressure spring mounting groove, a friction boss is arranged on the top surface of the sliding block, a sliding block mounting cavity is a cavity with an opening at the bottom, and openings matched with the sliding block friction boss in size are formed in two side walls of the cavity. The arrangement of the pressure spring mounting groove can limit the displacement of the pressure spring in work, so that the slide block works more reliably.
The utility model has the advantages that:
1. the utility model discloses an electronic accelerator pedal is through setting up hysteresis mechanism between pedal connecting rod and base, this hysteresis mechanism can turn into the sliding friction of slider and base with the pedal power that driver foot was applyed to pedal connecting rod, produce frictional damping power promptly, the driver just can control the footboard position well, the hysteresis effect that remains stable throughout driving the in-process, make signal stable output, improve driving comfort when consumption reduction and emission reduction, reduce the tired sense of driver foot, this has also improved driving safety indirectly, the emergence of traffic accident has been reduced.
2. The spring force of the pressure spring can be preset according to the requirement of a customer, so that the damping force between the sliding block and the base is adjusted.
Drawings
Fig. 1 is an external view showing an electronic accelerator pedal according to embodiment 1 of the present application.
Fig. 2 is a schematic diagram showing a configuration of an electronic accelerator pedal according to embodiment 1 of the present application.
Fig. 3 is an exploded view of fig. 1.
Fig. 4 is a schematic view showing a pedal link structure of an electronic accelerator pedal according to embodiment 1 of the present application.
Fig. 5 is a schematic view showing a base structure of an electronic accelerator pedal according to embodiment 1 of the present application; (a) is a right side view of (b), (b) is a bottom view from the bottom of the base, and (c) is a left side view of (b).
Fig. 6 is a schematic diagram showing a structure of a slider of an electronic accelerator pedal according to embodiment 1 of the present application.
Fig. 7 is a schematic view showing a structure of a sensor shaft of an electronic accelerator pedal according to embodiment 1 of the present application; (a) is the left view of (b), and (b) is a schematic three-dimensional structure.
Fig. 8 is a schematic view showing the structure of a dust cover of an electronic accelerator pedal according to embodiment 1 of the present application.
Fig. 9 is a schematic configuration diagram showing an electronic box of an electronic accelerator pedal according to embodiment 1 of the present application.
Fig. 10 is a schematic diagram showing a friction model of an electronic accelerator pedal according to embodiment 1 of the present application.
Fig. 11 is a schematic view of a mechanical model of an electronic accelerator pedal according to embodiment 1 of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings and a preferred embodiment.
In the following description, taking the electronic accelerator pedal shown in fig. 1 as an example, one end of the pedal link coupled to the base is a front end of the electronic accelerator pedal, and vice versa is a rear end.
Embodiment 1
Referring to fig. 1, 2 and 3, the application provides a damping force adjustable suspension type electronic accelerator pedal with hysteresis effect, which comprises a pedal connecting rod 1, a base 2, inner and outer compression springs 3-1 and 3-2, a sensor shaft 4, a slider 5, a slider compression spring 6, a dust cover 7, an electronic box 8 and a screw 9. The inner and outer compression springs 3-1 and 3-2 form a return spring.
In this embodiment, the internal and external compression springs 3-1, 3-2 are double helical cylindrical springs.
Referring to fig. 4, a first mounting hole 1-3 of the sensor shaft is formed in the front end of the pedal connecting rod 1, the first mounting hole 1-3 penetrates through the front side surface and the rear side surface of the pedal connecting rod, four long rib positions are uniformly distributed in the hole in the axial direction, and the width of one rib position 1-3-1 is slightly larger than the width of the other three rib positions 1-3-2. A pedal connecting rod at the front side of the first mounting hole 1-3 is provided with an inner and outer pressure spring first mounting boss and a sliding block mounting cavity 1-1, and the sliding block mounting cavity 1-1 is provided with openings at the left, right and lower side surfaces; the openings 1-1-1 on the left side and the right side are matched with the size of the sliding block. The first mounting boss is arranged on the upper side face of the pedal connecting rod and integrally formed with the pedal connecting rod, the first mounting boss comprises an inner boss 1-2-1 and an outer boss 1-2-2, the inner boss 1-2-1 is matched with the inner pressure spring 3-1, and the outer boss 1-2-2 is matched with the outer pressure spring 3-2.
Referring to fig. 5, the base 2 includes a bottom plate, a top cover, front and rear side plates, and left and right side plates, which enclose a base inner cavity, the bottom and rear sides of the base inner cavity are provided with openings, and the lower end of the bottom plate surrounding the openings is provided with six slots 2-4 matched with the dust cap. The inner side surfaces of the left and right side plates are friction surfaces of the inner cavity of the base, and the two side plates are obliquely arranged, so that the cross section of the inner cavity of the base is gradually reduced from bottom to top. The two side plates are provided with a second mounting hole 2-1-1 and a third mounting hole 2-1-2 of the sensor shaft in a penetrating way, and four screw holes 2-2 for mounting the electronic box are arranged outside the second mounting hole 2-1-1. The inner side surface of the base top plate is provided with an inner and outer pressure spring second mounting boss, the second mounting boss comprises an inner boss 2-3-1 and an outer boss 2-3-2, the inner boss 2-3-1 is matched with the inner pressure spring 3-1, and the outer boss 2-3-2 is matched with the outer pressure spring 3-2.
Referring to fig. 6, two sliding blocks 5 are provided, a sliding block pressure spring installation groove 5-1 is provided on the bottom surface of the sliding block, and a friction boss 5-2 contacting with the friction surface of the inner cavity of the base is provided on the top surface of the sliding block. The two sliding blocks are symmetrically arranged and are connected through sliding block compression springs 6 arranged in the two sliding block compression spring mounting grooves 5-1.
Referring to fig. 7, the sensor shaft 4 is a stepped shaft and comprises a small end 4-3, a middle section and a large end 4-2 which are sequentially connected, the outer diameter of the middle section is matched with the aperture of a first mounting hole 1-3 of the sensor shaft, four long grooves are axially and uniformly distributed on the peripheral surface of the middle section, and the width of one groove 4-1-1 is slightly larger than the width of the other three grooves 4-1-2; the groove 4-1-2 is matched with the rib position 1-3-2, the groove 4-1-1 is matched with the rib position 1-3-1, and mistake proofing is performed by setting the width of the rib position and the groove; the large end of the sensor shaft is provided with a limiting surface 4-2, and the limiting surface 4-2 is a step surface.
Referring to fig. 8, the dust cap is provided with six fasteners 7-1 adapted to the slots 2-4 of the base 2, and the base 2 and the dust cap 7 are fixed together by interference fit of the fasteners 7-1 and the slots 2-4.
Referring to fig. 9, the electronic box 8 is provided with four screw holes 8-1, and the electronic box 8 is fixed on the base 2 by screws 9.
Referring to fig. 1, 2 and 3, the front end of the pedal connecting rod 1 is inserted into the inner cavity of the base from the opening at the rear end of the inner cavity of the base, the inner and outer compression springs 3-1 and 3-2 are placed on the compression spring mounting bosses of the pedal connecting rod 1 and the base 2, the upper end of the inner compression spring 3-1 is placed on the outer side of the inner boss 2-3-1, the lower end is placed on the outer side of the inner boss 1-2-1, the upper end of the outer compression spring 3-2 is placed on the outer side of the outer boss 2-3-2, and the lower end is placed on the outer side of the outer; a sliding block pressure spring 6 is arranged in a pressure spring mounting groove 5-1 of two sliding blocks 5, the two sliding blocks 5 are pressed by hands and placed into a sliding block mounting cavity 1-1 from an opening at the bottom of the sliding block mounting cavity 1-1, the sliding blocks 5 move towards two sides under the action of the sliding block pressure spring 6 after being placed in the sliding block mounting cavity, a boss 5-2 on the outer side of each sliding block extends out of a left opening 1-1-1 of the sliding block mounting cavity 1-1, a boss surface 5-2 is in contact with two friction surfaces of an inner cavity of a base 2, and the sliding block pressure spring 6 is; the small end 4-3 of the sensor shaft 4 sequentially penetrates through the second mounting hole 2-1-1 of the sensor shaft, the first mounting hole 1-3 of the sensor shaft and the third mounting hole 2-1-2 of the sensor shaft, four long rib positions 1-3-1 and 1-3-2 in the first mounting hole 1-3 of the pedal connecting rod 1 are respectively clamped in four long grooves 4-1-1 and 4-1-2 on the sensor shaft 4, the middle section of the sensor shaft 4 is in interference fit with the first mounting hole 1-3 and is in clearance fit with the second mounting hole 2-1-1 and the third mounting hole 2-1-2, and the limiting surface 4-2 of the large end of the sensor shaft 4 abuts against the outer side surface of the second mounting hole 2-1-1 of the base 2. The slide block 5 is driven by the pedal connecting rod 1 to slide up and down in the base 2, and generates friction force, namely damping force, with the inner cavity surface of the base 2. When the pedal connecting rod pedal 1 is moved by external force, the internal and external compression springs 3-1 and 3-2 provide initial force and resilience force for the whole pedal movement.
The working principle of the present invention is further explained with reference to fig. 10 and fig. 11 as follows:
referring to fig. 1 and 11, when the automobile is running, the foot of the driver applies an external force to the pedal connecting rod 1, the pedal connecting rod 1 rotates around the sensor shaft 4, the sliding block 5 installed at the front end of the pedal connecting rod 1 slides up and down along with the pedal connecting rod 1 in the inner cavity of the base 2, namely, sliding friction force is generated between the sliding block 5 and the inner cavity friction surface of the base 2, and the sliding block pressure spring 6 is always in a compressed state between the two sliding blocks 5. The friction surface of the inner cavity of the base 2 is provided with an inclination, the pedal connecting rod 1 drives the sliding block to slide up and down, and the compression amount of the sliding block compression spring 6 is continuously changed to realize the change of a positive force, namely the change of a damping force.
A friction force simple mechanical model as shown in FIG. 10 is established:
friction force: f is 2 f';
Fn＝Ft×sinθ；Ft＝k*x；
fˊ＝Fn×μ＝Ft×sinθ×μ。
the damping force can be changed by adjusting the theta angle and the slide block compression spring, and in the example, the pedal damping force is basically required to be constant, so that the influence of the theta angle can be ignored, and Fn is approximately equal to Ft.
Wherein: μ denotes coefficient of friction (known)
f: indicating frictional force
Ft is a slider spring force
Fn represents the positive force of the slide block.
A mechanical model diagram as shown in FIG. 11 is established:
balance formula FxL ═ Ft × i + F × i; ① (positive stroke)
Ft × i-F × i; (return stroke) ②
Damping force of 2F × i/L or F × L ③
F ═ Δ FxL/(2 × i); ④
And the friction force: f is 2 f';
fˊ＝Fn×μ；⑤
a slide block compression spring: according to the formula④ and ⑤ are available, and the method comprises the following steps,
the return pressure spring can be obtained according to formulas ① and ④,
according to the above formula, Ft and Fn can be obtained respectively.
Wherein: f: indicating a force is applied at the location of the step; (known)
△ F, damping force (known)
μ denotes a friction coefficient; (known)
f: the friction force is expressed, and the magnitude of f can be adjusted through a slide block compression spring;
ft represents a return spring force;
fn: representing the slider compression spring force;
l: representing a pedal moment arm; (known)
I: representing a spring force, friction force arm (known).
Claims (10)
1. A suspension type electronic accelerator pedal with hysteresis effect and adjustable damping force comprises a pedal connecting rod and a base, and is characterized in that the front end of the pedal connecting rod extends into an inner cavity of the base and is hinged with the base through a sensor shaft, a slider mounting cavity and a first spring mounting boss are arranged on the pedal connecting rod positioned on the front side of the sensor shaft, a left slider and a right slider are arranged in the slider mounting cavity and are connected through a pressure spring, the left slider and the right slider extend out from the left side and the right side of a pressure spring placing cavity respectively under the elastic force action of the pressure spring and are in sliding friction connection with two side faces of the inner cavity of the base, and the pressure spring is always in a; a return spring is arranged in the first spring mounting boss, the lower end of the return spring abuts against the pedal connecting rod, and the upper end of the return spring abuts against the top surface of the inner cavity of the base; the pedal connecting rod rotates around the sensor shaft to drive the two sliding blocks to slide up and down in the inner cavity of the base to generate damping force.
2. The suspended electronic accelerator pedal according to claim 1, wherein two side surfaces of the inner cavity of the base are oppositely and inwardly inclined.
3. The suspended electronic accelerator pedal according to claim 2, wherein the angle (θ) at which the two side surfaces of the inner cavity of the base are inclined inward is 87 ° to 90 °.
4. The suspended electronic accelerator pedal according to claim 1, wherein the slider is made of POM abrasion resistant material.
5. The suspended electronic accelerator pedal according to claim 1, wherein the return spring is a double-helical cylindrical spring, the inner side surface of the top surface of the inner cavity of the base is provided with a second spring mounting boss, each of the first and second spring mounting bosses is composed of an inner boss and an outer boss, the inner boss is adapted to the inner spring of the double-helical cylindrical spring, the outer boss is adapted to the outer spring of the double-helical cylindrical spring, the lower end of the double-helical cylindrical spring is mounted on the first spring mounting boss, and the upper end of the double-helical cylindrical spring is mounted on the second spring mounting boss.
6. The suspended electronic accelerator pedal according to claim 1, wherein the pedal connecting rod is in interference fit connection with the sensor shaft through a shaft hole, and the sensor shaft is in clearance fit connection with the base through a shaft hole.
7. The suspended electronic accelerator pedal according to claim 6, wherein the sensor shaft is axially provided with a strip-shaped slot at the portion connected with the pedal connecting rod, and the pedal connecting rod is provided with a rib position matched with the slot.
8. The suspended electronic accelerator pedal according to claim 7, wherein the sensor shaft is provided with four elongated slots, wherein the width of one elongated slot is slightly larger than the widths of the other three elongated slots; four rib positions are arranged in the through hole of the pedal connecting rod, the width of one rib position is slightly larger than the width of the other three rib positions, and the wide and long grooves are matched with the wide rib positions.
9. The suspended electronic accelerator pedal according to claim 1, further comprising a dust cover, wherein the dust cover is provided with six fasteners, and a clamping groove is formed around the lower opening of the inner cavity of the base and is in interference fit with the fasteners.
10. The suspended electronic accelerator pedal according to claim 1, wherein a pressure spring mounting groove is formed on the bottom surface of the slide block, the pressure spring is mounted in the pressure spring mounting groove, a friction boss is arranged on the top surface of the slide block, the slide block mounting cavity is a cavity with an opening at the bottom, and openings matched with the size of the friction boss are formed in two side walls of the cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921191458.4U CN210680393U (en) | 2019-07-26 | 2019-07-26 | Damping force adjustable suspension type electronic accelerator pedal with hysteresis effect |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921191458.4U CN210680393U (en) | 2019-07-26 | 2019-07-26 | Damping force adjustable suspension type electronic accelerator pedal with hysteresis effect |
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| CN210680393U true CN210680393U (en) | 2020-06-05 |
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| CN201921191458.4U Active CN210680393U (en) | 2019-07-26 | 2019-07-26 | Damping force adjustable suspension type electronic accelerator pedal with hysteresis effect |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114211958A (en) * | 2022-01-13 | 2022-03-22 | 安徽江淮汽车集团股份有限公司 | Accelerator pedal assembly |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114211958A (en) * | 2022-01-13 | 2022-03-22 | 安徽江淮汽车集团股份有限公司 | Accelerator pedal assembly |
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