Pedal structure of booster clutch

Abstract

A pedal structure of a power-assisted clutch comprises a pedal mounting seat, a track plate, a pedal assembly and an elastic power-assisted assembly, a power-assisted track surface is arranged on the track plate, and a power-assisted shifting fork is arranged on the pedal assembly; the track plate is fixedly arranged on the pedal mounting seat; the pedal assembly is hinged to the pedal mounting seat; one end of the elastic power-assisted assembly is hinged to the pedal mounting seat, and the other end of the elastic power-assisted assembly abuts against the power-assisted track surface of the track plate and is movably connected with a power-assisted shifting fork of the pedal assembly; when the clutch pedal is treaded, the end portion, movably connected with the pedal assembly, of the elastic boosting assembly moves along the boosting track surface of the track plate, and the treading boosting force provided by the elastic boosting assembly is controlled by the boosting track surface, so that the force of treading the clutch pedal is obviously reduced, and the clutch pedal can be more stably treaded. And meanwhile, the force change of treading the clutch pedal is consistent with the working curve when the clutch is separated, so that the accuracy of the space-time travel of treading the clutch pedal and the separation position of the clutch is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery equipment, in particular to a power-assisted clutch pedal structure. Background Art

[0002] Agricultural machinery needs to change gears frequently during operation, so the clutch pedal needs to be stepped on frequently; as the power of agricultural machinery continues to increase, the driving force required for clutch operation is getting greater and greater, so the pedaling force required to overcome the clutch action is also getting greater and greater. Frequent and forceful stepping on the clutch pedal can easily cause fatigue to agricultural machinery operators and reduce work efficiency.

[0003] The utility model patent with application number 202323475783.2 discloses an air-assisted clutch pedal structure and assembly, which provides assistance to the clutch pedal during the operation of agricultural machinery and significantly reduces the force of stepping on the clutch pedal; however, during the implementation of the air-assisted clutch pedal structure and assembly, agricultural machinery manufacturers reported the following problems: 1. For a single clutch, the use of the air-assisted clutch pedal structure and assembly will cause the feeling of the empty travel to disappear when the clutch pedal is stepped on, and the clutch separation position cannot be accurately felt; 2. For a dual clutch, when the clutch pedal is stepped on, the transition feeling between the primary and secondary clutches is not obvious, and the secondary clutch cannot be accurately controlled, which can easily cause the secondary clutch to slip when it does not need to be separated, thereby making the secondary clutch easy to wear and shortening the service life of the secondary clutch. Utility Model Content

[0004] In order to overcome the shortcomings in the background technology, the utility model discloses a power-assisted clutch pedal structure. On the basis of the structure disclosed in the utility model patent application No. 202323475783.2, a track plate with a power-assisted track surface is added; when stepping on the clutch pedal, the end of the elastic power-assisted component movably connected to the foot pedal component moves along the power-assisted track surface of the track plate, and the pedaling assistance provided by the elastic power-assisted component is controlled by the power-assisted track surface, and provides a pedaling assistance that matches and changes with the working characteristic curve when the clutch is separated, which not only significantly reduces the force of stepping on the clutch pedal, but also keeps the force change of stepping on the clutch pedal consistent with the working characteristic curve when the clutch is separated; therefore, when the power-assisted clutch pedal structure is applied to a single clutch, it has an obvious feeling of stepping on the empty travel, and can accurately feel the clutch separation position; when applied to a dual clutch, the transition feeling between the primary and secondary clutches can be clearly felt, so that the secondary clutch can be accurately controlled to separate, avoiding the secondary clutch from slipping when it does not need to be separated, resulting in the problem of shortening the service life of the secondary clutch.

[0005] In order to achieve the purpose of the utility model, the utility model adopts the following technical scheme: a power-assisted clutch pedal structure, including a pedal mounting seat, a track plate, a foot pedal assembly, and an elastic power-assisted assembly. The track plate is provided with a power-assisted track surface, and the foot pedal assembly is provided with a power-assisted fork; the track plate is fixedly arranged on the pedal mounting seat, and the foot pedal assembly is hingedly connected to the pedal mounting seat; one end of the elastic power-assisted assembly is hingedly connected to the pedal mounting seat, and the other end abuts against the power-assisted track surface of the track plate, and is movably connected to the power-assisted fork of the foot pedal assembly; when stepping on the clutch pedal, the end of the elastic power-assisted assembly movably connected to the foot pedal assembly moves along the power-assisted track surface of the track plate, and the pedaling power provided by the elastic power-assisted assembly is controlled by the power-assisted track surface, and provides a pedaling power that changes with the working characteristic curve when the clutch is separated, so that when the power-assisted clutch pedal structure is used in a single clutch, it has an obvious feeling of stepping on the empty travel, and the clutch separation position can be accurately felt; when used in a dual clutch, the transition between the primary and secondary clutches can be clearly felt, so that the secondary clutch separation can be accurately controlled to avoid slipping when the secondary clutch does not need to be separated.

[0006] Furthermore, the vertical projection of the power-assisting track surface is the power-assisting track line, and the power-assisting track line is formed by splicing a number of curves or straight lines.

[0007] Furthermore, the clutch is divided into a single clutch and a dual clutch. When the single clutch is separated, the working characteristic curve is designed to obtain a single-assistance track line, and when the dual clutch is separated, the working characteristic curve is designed to obtain a dual-assistance track line.

[0008] Furthermore, several curve segments in the power-assisting track line are irregular curves, circular arcs, sine curves, involutes or logarithmic curves.

[0009] Furthermore, the power-assist track line is designed according to the unassisted pedaling force curve when the clutch is disengaged (i.e., the working characteristic curve when the clutch is disengaged); there are two methods for designing the power-assist track line: one is to design through mathematical modeling, and the other is to design through two-dimensional mapping software. The technical solution of this patent application adopts the design through two-dimensional mapping software.

[0010] Furthermore, the pedal mounting seat includes a base plate and a hinged plate. There are two hinged plates, which are symmetrically arranged on the upper part of the base plate by welding. The track plate is an arched plate, and the inner side of the arched plate is a power-assisting track surface. The arched plate is fixed between the two hinged plates by welding, close to the lower part of the base plate.

[0011] Furthermore, the pedal assembly includes an articulated sleeve, a pedal connecting rod, a power-assist fork, and a pull rod connecting piece. The power-assist fork is provided with two pieces, and a fork slide groove is provided on the power-assist fork; the pedal connecting rod, the power-assist fork, and the pull rod connecting piece are fixed on the outer circumferential surface of the articulated sleeve by welding, wherein the power-assist fork is symmetrically arranged on the outer circumferential surface of the articulated sleeve; the power-assist clutch pedal structure is connected to the clutch pull rod when working, and the clutch separation is controlled by the clutch pull rod; the force arms formed by the pedal connecting rod, the power-assist fork, the pull rod connecting piece and the axis of the articulated sleeve are L3, L2, and L1 respectively, and angles are set between L3, L2, and L1, wherein the angle between L1 and L2 is 27.6°, and the angle between L1 and L3 is 62.6°; the articulated sleeve of the pedal assembly is arranged between the two articulated plates of the pedal mounting seat, and is hingedly connected to the articulated plates through an articulated shaft. When the foot pedal is stepped on, the pedal assembly rotates around the articulated shaft.

[0012] Furthermore, the elastic power-assisting component is an energy storage device, which provides a pedal assist when the clutch pedal is stepped on; the elastic power-assisting component includes a power-assisting cylinder, a piston rod, a roller shaft, and a roller. The power-assisting cylinder is hingedly connected to a base plate or a track plate. In the drawings of the patent application document, only the structure in which the power-assisting cylinder and the track plate are hingedly connected is shown. In the structure disclosed in the utility model patent with application number 202323475783.2, the structure in which the power-assisting cylinder and the base plate are hingedly connected is shown. In the elastic power-assisting component, the piston rod is movably arranged in the power-assisting cylinder, and the high-pressure gas filled in the sleeve is Or a pre-stressed spring is provided to drive the piston rod to move outward; the roller shaft is arranged at the end of the piston rod, and three rollers are provided, one is arranged in the middle of the roller shaft, and the other two are symmetrically arranged at the ends of the roller shaft, wherein the outer cylindrical surface of the roller arranged in the middle of the roller shaft conflicts with the power-assisting track surface, and the rollers symmetrically arranged at both ends of the roller shaft are movably arranged in the shift fork slide groove. The purpose of arranging the rollers is to reduce friction and prevent the power-assisting track surface and the shift fork slide groove from being worn during the long-term operation of the power-assisting clutch pedal structure, especially to prevent the power-assisting track surface from being worn, which affects the pedaling force curve after the assist.

[0013] Furthermore, the elastic assisting component is a gas spring, or an elastic element is provided in the elastic assisting component as an energy storage device.

[0014] Due to the adoption of the technical solution as described above, the utility model has the following beneficial effects: the utility model discloses a power-assisted clutch pedal structure, comprising a pedal mounting seat, a track plate, a foot pedal assembly, and an elastic power-assisted assembly, wherein the track plate is provided with a power-assisted track surface, and the foot pedal assembly is provided with a power-assisted fork; the track plate is fixedly arranged on the pedal mounting seat; the foot pedal assembly is hingedly connected to the pedal mounting seat; one end of the elastic power-assisted assembly is hingedly connected to the pedal mounting seat, and the other end abuts against the power-assisted track surface of the track plate, and is movably connected to the power-assisted fork of the foot pedal assembly; when the clutch pedal is stepped on, the end of the elastic power-assisted assembly movably connected to the foot pedal assembly moves along the power-assisted track surface of the track plate, and the elastic power-assisted assembly The pedal assist provided is controlled by the assist track surface, and the pedal assist that changes with the working characteristic curve when the clutch is disengaged is provided through the assist fork of the foot pedal assembly, which not only significantly reduces the force of stepping on the clutch pedal, but also makes the change of the force of stepping on the clutch pedal consistent with the working curve when the clutch is disengaged; therefore, when the assist clutch pedal structure is used in a single clutch, it has an obvious pedaling empty travel feeling, and the clutch disengagement position can be accurately felt; when used in a dual clutch, the transition feeling between the primary and secondary clutches can be clearly felt, so that the secondary clutch can be accurately controlled to be disengaged, avoiding the secondary clutch from slipping when it does not need to be disengaged, resulting in the problem of shortened service life of the secondary clutch. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the appearance of the power-assisted clutch pedal structure;

[0016] Figure 2 It is a schematic diagram of the structure of the power-assisted clutch pedal;

[0017] Figure 3 This is a schematic diagram of the appearance of the pedal mounting seat and the track plate;

[0018] Figure 4 This is the front view of the single-boost track plate;

[0019] Figure 5 This is the front view of the double-assist track plate;

[0020] Figure 6 This is a schematic diagram of the appearance of the pedal assembly;

[0021] Figure 7 It is a schematic diagram of each lever arm of the pedal assembly;

[0022] Figure 8 This is a schematic diagram of the appearance of the elastic booster component;

[0023] Fig. 9 This is a schematic diagram of the roller assembly structure at the end of the piston rod;

[0024] Fig.10It is a schematic diagram of a single power-assisted track line;

[0025] Fig.11 It is a schematic diagram of the double-assistance track line;

[0026] Fig.12 This is a schematic diagram of the initial position of the power-assisted clutch pedal structure;

[0027] Fig.13 This is a schematic diagram of the force analysis of the initial position of the power-assisted clutch pedal structure;

[0028] Fig.14 This is a schematic diagram of the power-assist inflection point position of the power-assist clutch pedal structure;

[0029] Fig.15 This is a schematic diagram of the force analysis of the assist inflection point of the assist clutch pedal structure;

[0030] Fig.16 This is a schematic diagram of the power-assisting position of the power-assisting clutch pedal structure;

[0031] Fig.17 This is a schematic diagram of the force analysis of the power-assisting position of the power-assisting clutch pedal structure;

[0032] Fig.18 It is a schematic diagram of the measured curves of the pedaling force without power assistance and the pedaling force after power assistance of a single clutch;

[0033] Fig.19 It is a schematic diagram of the measured curves of the unassisted pedaling force and the assisted pedaling force of the dual-clutch.

[0034] In the figure: 1. Pedal mounting base;

[0035] 1.1. Base plate; 1.2. Articulated plate; 2. Track plate; 2.1. Power-assisted track surface; 3. Pedal assembly; 3.1. Articulated sleeve; 3.2. Pedal connecting rod; 3.3. Power-assisted fork; 3.3.1. Fork slide groove; 3.4. Pull rod connecting piece; 4. Elastic power-assisted assembly; 4.1. Power-assisted cylinder; 4.2. Piston rod; 4.2.1. Articulated ear at the end of the piston rod; 4.3. Roller shaft; 4.4. Roller; 4.5. Spacer; 4.6. Gasket; 4.7. Shift ring. DETAILED DESCRIPTION

[0036] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0037] See the instruction manual Figure 1 , 2 : A power-assisted clutch pedal structure, comprising a pedal mounting seat 1, a track plate 2, a foot pedal assembly 3, and an elastic power-assisted assembly 4;

[0038] See the instruction manual Figure 3 : The pedal mounting seat 1 includes a base plate 1.1 and a hinge plate 1.2. The hinge plates 1.2 are provided with two pieces, which are symmetrically arranged on the upper part of one side of the base plate 1.1 by welding, and the two hinge plates 1.2 are provided with hinge holes correspondingly; the track plate 2 is fixedly arranged on the same side of the base plate 1.1 by welding, and is arranged between the two hinge plates 1.2, close to the lower part of the base plate 1.1;

[0039] See the instruction manual Figure 4 , 5 : The track plate 2 is an arched plate, and a power-assisted track surface 2.1 is provided on the inner side of the arched plate. The vertical projection of the power-assisted track surface 2.1 is a power-assisted track line, and the power-assisted track line is formed by tangent splicing of several curves or straight lines; the several curves in the power-assisted track line can be irregular curves, circular arcs, sine curves, involutes or logarithmic curves; the power-assisted track line is designed according to the non-power-assisted pedaling force curve when the clutch is separated. Since the clutch is divided into a single clutch and a double clutch, the power-assisted track line can be designed to form a single power-assisted track line or a double power-assisted track line; a hinge hole is provided at the lower part of the track plate 2;

[0040] See the instruction manual Figure 6 : The pedal assembly 3 includes an articulated sleeve 3.1, a pedal connecting rod 3.2, a power fork 3.3, and a pull rod connecting piece 3.4. The power fork 3.3 is provided with a fork slide groove 3.3.1. The pedal connecting rod 3.2, the power fork 3.3, and the pull rod connecting piece 3.4 are fixedly arranged on the outer cylindrical surface of the articulated sleeve 3.1 by welding; wherein the power fork 3.3 is provided with two pieces, which are symmetrically arranged on the outer cylindrical surface of the articulated sleeve 3.1; see the attached manual Figure 7 : The lever arms formed by the rotation of the pedal connecting rod 3.2, the power fork 3.3 and the pull rod connecting piece 3.4 around the axis of the articulated sleeve 3.1 are L3, L1 and L2 respectively, the angle between L3 and L1 is 62.6°, and the angle between L1 and L2 is 27.6°; it is additionally explained that during the operation of the power-assisted clutch pedal structure, since the positions of the rollers 4.4 symmetrically arranged at both ends of the roller shaft 4.3 in the fork slide groove 3.3.1 are changing, the lever arm L1 of the power fork 3.3 around the axis of the articulated sleeve 3.1 is also continuously changing and is not a fixed value. The specific values ​​of the lever arm L1 in different states can be obtained by drawing; see the attached figure of the manual Figure 1 : The hinge sleeve 3.1 of the foot pedal assembly 3 is arranged between the two hinge plates 1.2 and is hingedly connected to the hinge plates through a hinge shaft;

[0041] See the instruction manual Figure 8: The elastic booster assembly 4 is a gas spring, including a booster cylinder 4.1, a piston rod 4.2, a roller shaft 4.3, and a roller 4.4. The piston rod 4.2 is movably arranged in the booster cylinder 4.1, and the high-pressure gas filled in the booster cylinder 4.1 pushes the piston rod 4.2 to move outward to provide assistance when stepping on the clutch pedal; see the attached manual Fig. 9 : The outer end of the piston rod 4.2 is provided with two hinged ears, the roller shaft 4.3 is arranged in the through hole of the hinged ears, and the roller 4.4 is provided with three, one is rotatably arranged between the two hinged ears, and the other two are symmetrically rotatably arranged on both sides of the roller shaft 4.3; see the attached manual Figure 1 , 2 : The outer cylindrical surface of the roller 4.4 arranged in the middle of the roller shaft 4.3 is in conflict with the power-assisting track surface 2.1, and the rollers 4.4 symmetrically arranged at both ends of the roller shaft 4.3 are movably arranged in the fork slide groove 3.3.1; the bottom of the power-assisting cylinder 4.1 is also provided with two hinged ears, and the hinged ears at the bottom of the power-assisting cylinder 4.1 are hingedly connected to the hinge hole of the track plate 2 through a hinge shaft; in addition, the elastic power-assisting component 4 can also adopt a spring-acting energy storage element, and the spring is arranged in the power-assisting cylinder 4.1, and the two ends are respectively in conflict between the power-assisting cylinder 4.1 and the piston rod 4.2. When the spring-acting energy storage element is adopted, as the piston rod 4.2 is guided outward along the power-assisting cylinder 4.1, the power provided by it will be significantly reduced;

[0042] The power-assisted clutch pedal structure is also provided with an initial position limiting structure, which is disclosed in detail in the utility model patent application number 202323475783.2;

[0043] When the clutch pedal is stepped on, the roller 4.4 arranged in the middle of the roller shaft 4.3 rolls along the power-assisting track surface 2.1 of the track plate 2, and the rollers 4.4 arranged on both sides of the roller shaft 4.3 roll in the fork slide groove 3.3.1; when the roller 4.4 in the middle of the elastic power-assisting component 4 rolls along the power-assisting track surface 2.1 of the track plate 2, the pedaling assistance provided by the elastic power-assisting component 4 is controlled by the power-assisting track surface 2.1, and provides a pedaling assistance that changes with the working characteristic curve when the clutch is separated, so that the power-assisting clutch pedal structure has an obvious feeling of pedaling empty travel when applied to a single-stage clutch, and the clutch separation position can be accurately felt; when applied to a dual-stage clutch, the transition feeling between the primary and secondary clutches can be clearly felt, so that the separation of the secondary clutch can be accurately controlled to avoid the slipping of the secondary clutch when it does not need to be separated.

[0044] There are two methods for designing the power-assisting track line of the power-assisting track surface 2.1. One is to establish a mathematical model according to the structure of the power-assisting clutch pedal structure, and design the power-assisting track line according to the mathematical model and the working characteristic curve when the clutch is separated; the other is to adopt a drawing method, that is, to draw the original power-assisting track line by a plane drawing method, and then further modify the original power-assisting track line according to the actual measurement results, and finally obtain the power-assisting track line;

[0045] In the present utility model, the power track line design adopts the drawing method, and the specific process is as follows:

[0046] According to the overall dimensions of the power-assisted clutch pedal structure, the structural dimensions of the foot pedal assembly 3 and the original relative position of the elastic power-assisted assembly 4 are preliminarily drawn;

[0047] Firstly, the actual pedaling force of the pedal assembly 3 under the unassisted state at several rotation angles is measured, and the unassisted pedaling force curve is made according to the measured value; then, the assisted pedaling design curve is drawn according to the unassisted pedaling force curve;

[0048] According to the rotation angle of the foot pedal assembly 3 corresponding to several points in the post-assisted pedaling design curve, the relative position of the corresponding foot pedal assembly 3 and the elastic power-assisting assembly 4 is drawn, and the extension distance of the piston rod 4.2 relative to the power-assisting cylinder 4.1 is preliminarily determined, and then the force analysis of the roller 4.4 in the middle of the roller shaft 4.3 is performed by drawing; in the force analysis process, by repeatedly adjusting the extension distance of the piston rod 4.2 relative to the power-assisting cylinder 4.1, the optimal extension distance of the piston rod 4.2 relative to the power-assisting cylinder 4.1 is finally obtained (at this time, the foot pedal assembly 3 maintains a balance of rotational torque under the post-assisted pedaling force and other forces at the corresponding rotation angle), and at this time, the intersection point of the axis of the elastic power-assisting assembly 4 and the outermost circumference of the roller 4.4 is a point on the power-assisting track line of the foot pedal assembly 3 at the corresponding rotation angle;

[0049] Repeat step 3 to obtain points on the power-assistance track line corresponding to other points in the power-assistance post-pedaling design curve;

[0050] Use straight lines or curves to fit all the points obtained in step 4, and then obtain the power-assistance track line. It is also noted that when drawing force analysis, for the convenience of drawing, it is assumed that the contact point between the roller 4.4 and the power-assistance track line is on the axis of the elastic power-assistance component 4. Therefore, the actual contact point between the roller 4.4 and the power-assistance track line is different, which will cause drawing calculation errors. This error is compensated by correcting the shape of the power-assistance track line in subsequent actual sample tests, until the error between the measured pedaling force curve after the power-assistance and the designed pedaling curve after the power-assistance is finally controlled within the set range of 0.2KG.

[0051] If a satisfactory power-assisting track line cannot be obtained through the above steps, the structural dimensions of the pedal assembly 3 and the relative original setting position with the elastic power-assisting assembly 4 are adjusted, and then steps 1-6 are repeated until a satisfactory power-assisting track line is finally obtained.

[0052] The following specifically describes the drawing force analysis process. First, when the elastic booster assembly 4 adopts a gas spring, the force F of the piston rod 4.2 remains basically unchanged within the entire stroke range. Therefore, when implementing this patent, a gas spring is preferably used; if the elastic booster assembly 4 adopts a spring as an energy storage element, the force F of the piston rod 4.2 changes within the entire stroke range, which increases the complexity of the booster track line; see the attached manual Fig.12 , 13 : Instruction manual attached Fig.12 The figure shows the relative positions of the foot pedal assembly 3 and the elastic booster assembly 4 in the initial state of the power-assisted clutch pedal structure. Fig.13 The force analysis diagram in the initial state is shown; in the initial state, the position of the pedal assembly 3 is limited by the initial position limit structure; according to the attached manual Fig.18 , showing that in the initial state, it takes about 2.5KG of force to step on the clutch pedal; see the attached manual Fig.13In the initial state, the elastic assisting component 4 provides a force F for the roller 4.4, which is represented by a set fixed length in the drawing (such as 100mm represents 5.0KG), the angle between the arm L1 and the force F is α, and the components of the force F along the arm L1 and the perpendicular arm L1 are F2 and F1 respectively (the lengths of F2 and F1 can be directly measured in the figure, and then calculated according to the proportional relationship of 100mm representing 5.0KG), where F2 coincides with the arm L1 and does not generate any rotational torque, and can be ignored, where F1=F*sinα; because the length of F1 in the figure corresponds to the length of force F in the figure, the specific value of the component force F1 can be calculated by measuring the length of F1 in the figure; in the initial state, the force W driving the clutch to separate is 0 (so the torque M2 is 0), and when the clutch pedal is not stepped on, the separation F1 drives the pedal assembly 3 to generate a counterclockwise rotational torque M1, which is increased from the initial position The limit structure offsets and keeps the driving pedal assembly 3 in the initial position; when the clutch pedal is stepped on to apply a pedal force P to drive the pedal assembly 3 to rotate clockwise, the torque on the pedal assembly 3 should satisfy M1≦M3, that is, it must satisfy F1*L1=P*L3, so it can be obtained that F1=P*L3 / L1, and after substitution, sinα=(2.5*L3) / (F*L1) must be satisfied, that is, in the initial state, when the pedal is stepped on with a force of 2.5KG to drive the pedal assembly 3 to rotate, it must satisfy sinα=(2.5*L3) / (F*L1); when the relative original setting position of the pedal assembly 3 and the elastic power-assisting assembly 4 is constant, the angle α is continuously adjusted and changed by drawing to adjust the extension distance of the piston rod 4.2 relative to the power-assisting cylinder 4.1, until finally sinα=(2.5*L3) / (F*L1) is satisfied, and a point on the power-assisting track line of the power-assisting clutch pedal structure in the initial state is obtained;

[0053] See the instruction manual Fig.14 , 15 : Instruction manual attached Fig.14 The figure shows the relative position of the foot pedal assembly 3 and the elastic booster assembly 4 when the booster clutch pedal structure is at the booster inflection point (the booster inflection point is the point beyond which the elastic booster assembly 4 begins to provide boost for clutch separation; when designed, the position of this point basically coincides with the end point of the clutch pedal's idle travel). Fig.15 The force analysis diagram at the inflection point is shown; at the inflection point, the force F coincides with the lever arm L1, and the elastic booster assembly 4 does not provide any boost at this time; usually, when designing, the point of the booster inflection point on the booster track line is not determined first, but is obtained by naturally connecting two adjacent points on the left and right near the inflection point on the booster track line;

[0054] See the instruction manual Fig.16 , 17 : Instruction manual attached Fig.16 The figure shows the relative position of the power-assisted clutch pedal structure and the elastic power-assisted component 4 when the foot pedal component 3 rotates 25 degrees. Fig.17 The force analysis diagram shown is when the pedal assembly 3 is rotated 25° with assistance; Fig.18 , showing that when the foot pedal assembly 3 is rotated 25°, it takes about 7.0KG of force to step on the clutch pedal; see the attached manual Fig.17 , when the pedal assembly 3 rotates 25°, the elastic power-assisting assembly 4 provides a force F for the roller 4.4, the angle between the lever arm L1 and the force F is β, the components of the force F along the lever arm L1 and the perpendicular lever arm L1 are F2 and F1 respectively, where F2 coincides with the lever arm L1, does not generate any rotational torque, and can be ignored, where F1=F*sinβ; when the pedal assembly 3 rotates 25°, the torque received by the pedal assembly 3 should satisfy M1+M3≧M2, that is, it must satisfy F1*L1+P*L3=W1*L2 (where W is the force driving the clutch to disengage, which can be obtained by actual measurement; W1 is the component of W in the direction perpendicular to the lever arm L2, which is calculated by measuring the length of W1 in the figure), so it can be obtained that F1=((W1*L 2)-(P*L3)) / L1, and after substitution, we get sinβ=((W1*L2)-(7.0*L3)) / (L1*F), that is, when the pedal assembly 3 is rotated 25°, when the pedal is stepped on with a force of 7.0KG to drive the pedal assembly 3 to rotate, sinβ=((W1*L2)-(7.0*L3)) / (L1*F) must be satisfied; when the pedal assembly 3 is rotated 25°, the angle β is continuously adjusted and changed by adjusting the extension distance of the piston rod 4.2 relative to the boost cylinder 4.1 by drawing, until finally sinβ=((W1*L2)-(7.0*L3)) / (L1*F) is satisfied, and a point on the boost track line of the boost clutch pedal structure in the boost state when the pedal assembly 3 rotates 25° is obtained;

[0055] The above process is repeated to finally obtain all points on the power-assisted track line corresponding to several points in the power-assisted pedaling design curve.

[0056] See the instruction manual Fig.10 , shows a schematic diagram of an actual single-assistance track line; in this figure, the single-assistance track line is composed of a straight line C1 and an irregular curve C2; ​​the curves CS and CE outside the straight line C1 and the irregular curve C2 are formed by natural extension of the structural design;

[0057] See the instruction manual Fig.11, shows a schematic diagram of an actual dual-power-assistance track line; in this figure, the dual-power-assistance track line is composed of a non-circular arc C1 and irregular curves C2, C3, and C4; the curves CS and CE outside the circular arc C1 and the irregular curve C4 are formed by natural extensions of the structural design.

[0058] See the instruction manual Fig.18 :This figure shows the comparison of the measured pedal force curve without power assistance and the measured pedal force curve after power assistance when the power-assisted clutch pedal structure is applied to single clutch operation. The measured pedal force curve after power assistance has a similar trend to the measured pedal force curve without power assistance, with only one rising power assistance section. However, the maximum pedal force has decreased significantly, from about 25KG to about 10KG.

[0059] See the instruction manual Fig.19 : This figure shows a comparison between the measured pedaling force curve without assistance and the measured pedaling force curve after assistance when the power-assisted clutch pedal structure is applied to dual-clutch operation. The measured pedaling force curve after assistance is similar to the measured pedaling force curve without assistance, with two rising power-assisted sections, but the maximum pedaling force has dropped significantly, and the maximum pedaling force has dropped from about 45KG to about 25KG. In addition, in the measured pedaling force curve after assistance, there is an inflection point of decreased pedaling force between the first rising power-assisted section and the second rising power-assisted section. This inflection point can be clearly felt as the transition between the first clutch and the second clutch when the clutch pedal is depressed.

[0060] The parts not described in detail in this utility model are prior art.

Claims

1. A power-assisted clutch pedal structure, comprising a pedal mounting seat (1), a foot pedal assembly (3), and an elastic power-assisted assembly (4), wherein the foot pedal assembly (3) is provided with a power-assisted shift fork (3.3); the foot pedal assembly (3) is hingedly connected to the pedal mounting seat (1); one end of the elastic power-assisted assembly (4) is hingedly connected to the pedal mounting seat (1), and the other end is movably connected to the power-assisted shift fork (3.3) of the foot pedal assembly (3); Its characteristics are: The invention also comprises a track plate (2), on which a power-assisting track surface (2.1) is provided, and the track plate (2) is fixedly arranged on the pedal mounting seat (1); when the clutch pedal is stepped on, the end of the elastic power-assisting component (4) movably connected to the pedal component (3) moves along the power-assisting track surface (2.1) of the track plate (2).

2. The power-assisted clutch pedal structure according to claim 1, Its characteristics are: The vertical projection of the power-assisting track surface (2.1) is the power-assisting track line, which is formed by tangently splicing a number of curves or straight lines.

3. The power-assisted clutch pedal structure according to claim 2, Its characteristics are: The power-assisted track line is divided into a single-power-assisted track line and a double-power-assisted track line.

4. The power-assisted clutch pedal structure according to claim 2, Its characteristics are: Several curve sections in the power-assisting track line are irregular curves, circular arcs, sine curves, involutes or logarithmic curves.

5. The power-assisted clutch pedal structure according to claim 1, Its characteristics are: The pedal mounting seat (1) comprises a base plate (1.1) and a hinged plate (1.2); the hinged plates (1.2) are provided with two pieces and are symmetrically arranged on the upper part of the base plate (1.1); and the track plate (2) is arranged between the two hinged plates (1.2).

6. The power-assisted clutch pedal structure according to claim 5, Its characteristics are: The pedal assembly (3) comprises an articulated sleeve (3.1), a pedal connecting rod (3.2), a power-assisting fork (3.3), and a pull rod connecting piece (3.4); the power-assisting fork (3.3) is provided with a fork slide groove (3.3.1); the pedal connecting rod (3.2), the power-assisting fork (3.3), and the pull rod connecting piece (3.4) are fixedly arranged on the outer circumferential surface of the articulated sleeve (3.1); wherein the power-assisting fork (3.3) is provided with two pieces, which are symmetrically arranged on the outer circumferential surface of the articulated sleeve (3.1); the articulated sleeve (3.1) of the pedal assembly (3) is arranged between two articulated plates (1.2) and is articulatedly connected to the articulated plates.

7. The power-assisted clutch pedal structure according to claim 6, Its characteristics are: pedal An included angle is provided between the force arm formed by the connecting rod (3.2), the power-assisting shift fork (3.3), the pull rod connecting piece (3.4) and the axis of the hinge sleeve (3.1).

8. The power-assisted clutch pedal structure according to claim 6, Its characteristics are: The elastic booster assembly (4) comprises a booster cylinder (4.1), a piston rod (4.2), a roller shaft (4.3), and a roller (4.4); the booster cylinder (4.1) is hingedly connected to a base plate (1.1) or a track plate (2); the piston rod (4.2) is slidably arranged in the booster cylinder (4.1); the roller shaft (4.3) is arranged at the end of the piston rod (4.2); three rollers (4.4) are provided, one is arranged in the middle of the roller shaft (4.3), and the other two are symmetrically arranged on both sides of the roller shaft (4.3); the outer cylindrical surface of the roller (4.4) arranged in the middle of the roller shaft (4.3) contacts the booster track surface (2.1), and the rollers (4.4) symmetrically arranged at both ends of the roller shaft (4.3) are movably arranged in the shift fork slide groove (3.3.1).

9. The power-assisted clutch pedal structure according to claim 1, Its characteristics are: The elastic boosting component (4) is a gas spring, or an elastic energy storage element is provided in the elastic boosting component (4).

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