CN108394275B - Clutch pedal boosting mechanism and tractor - Google Patents
Clutch pedal boosting mechanism and tractor Download PDFInfo
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- CN108394275B CN108394275B CN201810173007.1A CN201810173007A CN108394275B CN 108394275 B CN108394275 B CN 108394275B CN 201810173007 A CN201810173007 A CN 201810173007A CN 108394275 B CN108394275 B CN 108394275B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K23/00—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for
- B60K23/02—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for for main transmission clutches
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Abstract
The invention provides a clutch pedal boosting mechanism and a tractor, which relate to the technical field of agricultural machinery equipment and comprise a rotating shaft, a pedal assembly and a boosting elastic assembly, wherein the pedal assembly is rotationally connected with the rotating shaft; the rocker arm is connected with the pedal assembly, is connected with the first power-assisted elastic component through a rotating hinge point, and can rotate around the axis of the rotating shaft; the first power-assisted elastic component is connected with a fixed hinge pivot fixed on the vehicle body; along the axial direction of the rotating shaft, the rotating hinge fulcrum when the pedal assembly is at the initial position and the rotating hinge fulcrum when the pedal assembly is at the final position are positioned at two sides of a straight line connecting the rotating shaft and the fixed hinge fulcrum; the second boosting elastic component is connected with the pedal assembly and used for providing boosting force. The invention can realize higher matching of the power-assisted arrangement mode, the clutch separation characteristic and the clutch control movement characteristic, effectively reduce the control force of the pedal and improve the comfort of operation.
Description
Technical Field
The invention relates to the technical field of agricultural machinery equipment, in particular to a clutch pedal boosting mechanism and a tractor.
Background
At present, a tractor needs to shift gears frequently in the working process, so that a clutch pedal needs to be stepped frequently. The tractor has complicated working conditions and continuously upgraded horsepower, and the operating force of the clutch is heavy. If the clutch control power-assisted mechanism is not added, the requirement of people on the comfort of the tractor is difficult to meet, long-term fatigue of people is caused, and the working efficiency is reduced.
At present, an external servo mechanism (an air pump or a hydraulic pump) is mostly adopted in a power-assisted mode of the tractor to reduce the force of a clutch pedal. And the adoption of an external servo mechanism has the disadvantages of difficult arrangement and complex assembly, and increases the manufacturing cost of the tractor.
Therefore, a clutch operation assisting structure which is simple to assemble and has higher matching performance of an assisting arrangement mode and a clutch and clutch operation is the key point of research and development of the technical personnel in the field.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide a clutch pedal power-assisted mechanism and a tractor, which adopt a novel clutch control power-assisted mode, have simple structure and easy assembly, can realize higher matching of a power-assisted arrangement mode and the clutch separation characteristic, and can realize higher matching of the power-assisted mode and the clutch control motion characteristic, thereby effectively reducing the control force of a pedal and improving the operation comfort.
In order to achieve the purpose, the invention provides the following technical scheme:
in a first aspect, the invention provides a clutch pedal boosting mechanism, which comprises a rotating shaft, a pedal assembly and a boosting elastic assembly, wherein one end of the pedal assembly is rotatably connected with the rotating shaft, and the boosting elastic assembly comprises a rocker arm, a first boosting elastic part and a second boosting elastic part;
one end of the rocker arm is connected with the pedal assembly, and the other end of the rocker arm is connected with the first power-assisted elastic component through a rotating hinged point and can rotate around the axis of the rotating shaft along with the pedal assembly;
one end of the first power-assisted elastic component, which is far away from the rotating hinge point, is connected with a fixed hinge point fixed on the vehicle body;
along the axial direction of the rotating shaft, the rotating hinge point when the pedal assembly part is at the initial position and the rotating hinge point when the pedal assembly part is at the final position are positioned at two sides of a straight line connecting the rotating shaft and the fixed hinge point;
the second boosting elastic component is connected with the pedal assembly and used for providing boosting force for pushing the pedal assembly from the initial position to the final position.
Further, when the pedal assembly is in the initial position, the arm length of the rocker arm is L1; a moment arm length of the rocker arm is L1' when the pedal assembly is in a final position; and L1 is equal to L1'.
Further, the length of the rocker arm is larger than that of the first boosting elastic component.
Further, the first boosting elastic component comprises a guide rod, a guide sleeve, a limiting piece and a return elastic piece;
the guide sleeve is connected with the fixed hinge pivot, the guide rod is connected with the rocker arm, the guide rod is connected with the guide sleeve through the limiting piece, and the guide rod can reciprocate along the axis direction of the guide sleeve;
the return elastic piece is sleeved on the guide rod and the guide sleeve and can stretch along the axis direction of the guide sleeve.
Furthermore, a limiting groove is formed in the guide sleeve, one end of the guide rod extends into the guide sleeve, and the limiting groove is matched with the limiting part to limit the maximum telescopic degree of the return elastic part.
Furthermore, one end, deviating from the fixed hinge fulcrum, of the limiting groove is provided with a first limiting surface, and the limiting part is matched with the first limiting surface to prevent the guide rod from sliding out of the guide sleeve.
Further, when the pedal assembly is in the initial position, the return elastic piece is subjected to a preset pressure stress.
Further, the second boosting elastic part comprises a torsion spring which is connected with the pedal assembly.
Further, the torsion spring is provided with a preset acting force when the pedal assembly is at the initial position and is used for providing an assisting force for pushing the pedal assembly to the final position.
In a second aspect, the invention further provides a tractor, which comprises a vehicle body and the clutch pedal power-assisted mechanism of any one of the first aspect, wherein the clutch pedal power-assisted mechanism is mounted on the vehicle body.
The clutch pedal power-assisted mechanism and the tractor provided by the invention have the following beneficial effects:
the invention provides a clutch pedal boosting mechanism, which comprises a rotating shaft, a pedal assembly and a boosting elastic component, wherein one end of the pedal assembly is rotatably connected with the rotating shaft, and the boosting elastic component comprises a rocker arm, a first boosting elastic component and a second boosting elastic component; one end of the rocker arm is connected with the pedal assembly, and the other end of the rocker arm is connected with the first power-assisted elastic component through a rotating hinged point and can rotate around the axis of the rotating shaft along with the pedal assembly; one end of the first power-assisted elastic component, which is far away from the rotating hinge point, is connected with a fixed hinge point fixed on the vehicle body; along the axial direction of the rotating shaft, the rotating hinge fulcrum when the pedal assembly is at the initial position and the rotating hinge fulcrum when the pedal assembly is at the final position are positioned at two sides of a straight line connecting the rotating shaft and the fixed hinge fulcrum; the second boosting elastic component is connected with the pedal assembly and is used for providing boosting force for pushing the pedal assembly from the initial position to the final position.
In the clutch pedal power-assisted mechanism provided by the first aspect of the invention, the pedal assembly comprises a rotating arm connected with the rotating shaft and a pedal connected with the rotating arm, and when the pedal assembly rotates to a sudden change position from an initial position around the rotating shaft, the rotating hinge fulcrum is positioned on the right side of a straight line connecting the rotating shaft and the fixed hinge fulcrum, the rotating arm applies compressive stress to the first power-assisted elastic component, the first power-assisted elastic component plays a return role on the pedal, and the second power-assisted elastic component plays a power-assisted role on the pedal; when the pedal assembly rotates to the final position from the sudden change position around the rotating shaft, the rotating hinge fulcrum is positioned on the left side of a straight line connecting the rotating shaft and the fixed hinge fulcrum, the first power-assisted elastic component applies upward return force to the rotating arm, the first power-assisted elastic component plays a power-assisted role on the pedal, and the second power-assisted elastic component plays a power-assisted role on the pedal; the sudden change position is the position of the pedal assembly when the rotating shaft, the rotating hinge fulcrum and the fixed hinge fulcrum are positioned on the same straight line. One end of the first power-assisted elastic component, which deviates from the rotating arm, is connected with a fixed hinge pivot fixed on the vehicle body, the rotating arm is installed on a pedal assembly, the first power-assisted elastic component is integrated, the installation and the disassembly are convenient, and the problems of difficult assembly and low operation efficiency of a common power-assisted spring are solved.
The clutch pedal power assisting mechanism provided by the first aspect of the invention adopts a novel clutch operation power assisting mode, has a simple structure, is easy to assemble, can realize higher matching between the power assisting arrangement mode and the clutch separation characteristic, and can realize higher matching with the clutch operation motion characteristic, so that the pedal operation force is effectively reduced, and the operation comfort is improved.
The tractor provided by the second aspect of the invention is provided with the clutch pedal power-assisted mechanism provided by the first aspect of the invention, so that all the beneficial effects of the clutch pedal power-assisted mechanism provided by the first aspect of the invention are achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a simplified schematic diagram of a clutch pedal assist mechanism according to an embodiment of the present invention, wherein the pedal assembly is in an initial position;
FIG. 2 is a simplified schematic diagram of a clutch pedal assist mechanism according to an embodiment of the present invention, wherein the pedal assembly is in a final position;
FIG. 3 is a schematic structural diagram of an assisted elastic member according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a guide rod of an assisted elastic component according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a guide sleeve in an assisted elastic component according to an embodiment of the present invention;
FIG. 6 is a first diagram of a clutch stroke and a power assisting effect analyzed by Admas software in embodiment 1 of the invention;
FIG. 7 is a diagram showing the clutch stroke and the boosting effect analyzed by Admas software in comparative example 1.
Icon: 1-fixing a hinge pivot; 2-rotating the hinge fulcrum; 3-a pedal assembly; 4-a rotating shaft; 5-a second force-assisted elastic component; 6-rocker arm; 7-a first assistive elastic component; 71-a guide bar; 72-a guide sleeve; 73-a stop; 74-return spring.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
Referring to fig. 1 to 7, a clutch pedal assist mechanism and a tractor according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
The embodiment of the first aspect of the invention provides a clutch pedal boosting mechanism, which comprises a rotating shaft 4, a pedal assembly 3 and a boosting elastic component, wherein one end of the pedal assembly 3 is rotatably connected with the rotating shaft 4, and the boosting elastic component comprises a rocker arm 6, a first boosting elastic component 7 and a second boosting elastic component 5;
one end of the rocker arm 6 is connected with the pedal assembly 3, and the other end of the rocker arm is connected with the first power-assisted elastic component 7 through the rotary hinge fulcrum 2 and can rotate around the axis of the rotating shaft 4 along with the pedal assembly 3;
one end of the first power-assisted elastic component 7, which is far away from the rotating hinge fulcrum 2, is connected with a fixed hinge fulcrum 1 fixed on the vehicle body;
along the axial direction of the rotating shaft 4, the rotating hinge fulcrum 2 when the pedal assembly 3 is at the initial position and the rotating hinge fulcrum 2 when the pedal assembly 3 is at the final position are positioned at two sides of a straight line connecting the rotating shaft 4 and the fixed hinge fulcrum 1;
the second boosting elastic member 5 is connected to the pedal assembly 3 for providing boosting force for pushing the pedal assembly 3 from the initial position to the final position.
In the clutch pedal boosting mechanism provided by the embodiment of the first aspect of the invention, the pedal assembly 3 comprises a rotating arm connected with the rotating shaft 4 and a pedal connected with the rotating arm, and when the pedal assembly 3 rotates from an initial position to a sudden change position around the rotating shaft 4, the rotating hinge point 2 is positioned on the right side of a straight line connecting the rotating shaft 4 and the fixed hinge point 1, the rotating arm applies compressive stress to the first boosting elastic component 7, the first boosting elastic component 7 plays a return role on the pedal, and the second boosting elastic component 5 plays a boosting role on the pedal, as viewed along the axial lead direction of the rotating shaft 4, the separation motion of the clutch is completed by the clockwise motion of the pedal assembly 3 around the rotating shaft 4; when the pedal assembly 3 rotates around the rotating shaft 4 from the sudden change position to the final position, the rotating hinge fulcrum 2 is positioned on the left side of a straight line connecting the rotating shaft 4 and the fixed hinge fulcrum 1, the first power-assisted elastic component 7 applies upward return force to the rotating arm, the first power-assisted elastic component 7 plays a power-assisted role on the pedal, and the second power-assisted elastic component 5 plays a power-assisted role on the pedal; the sudden change position is the position of the pedal assembly 3 when the rotating shaft 4, the rotating hinge fulcrum 2 and the fixed hinge fulcrum 1 are positioned on a straight line. One end of the first power-assisted elastic component 7, which is far away from the rotating arm, is connected with a fixed hinge pivot 1 fixed on a vehicle body, and the rocker arm 6 is arranged on the pedal assembly 3, for example, one end of the rocker arm 6 is welded with the pedal assembly 3; the first power-assisted elastic component 7 is integral, is convenient to install and disassemble, and solves the problems of difficult assembly and low operation efficiency of a common power-assisted spring. The second boosting elastic component 5 is arranged at one end of the rotating arm connected with the rotating shaft 4.
The clutch pedal power assisting mechanism provided by the embodiment of the first aspect of the invention adopts a novel clutch operation power assisting mode, has a simple structure, is easy to assemble, can realize higher matching between the power assisting arrangement mode and the clutch separation characteristic, and can realize higher matching with the clutch operation motion characteristic, thereby effectively reducing the pedal operation force and improving the operation comfort.
In an alternative embodiment, further, when the pedal assembly 3 is in the initial position, the arm length of the swing arm 6 is L1; when the pedal assembly 3 is in the final position, the arm length of the rocker arm 6 is L1'; and L1 is equal to L1'.
In an alternative embodiment, the length of the rocker arm 6 is greater than the length of the first boosting elastic part 7.
In an alternative embodiment of the present invention, further, the first elastic boosting component 7 includes a guide rod 71, a guide sleeve 72, a limiting member 73, and a return elastic member 74;
the guide sleeve 72 is connected with the fixed hinge pivot 1, the guide rod 71 is connected with the rocker arm 6, the guide rod 71 is connected with the guide sleeve 72 through a limiting piece 73, and the guide rod 71 can reciprocate along the axial direction of the guide sleeve 72;
the return elastic member 74 is fitted over the guide rod 71 and the guide sleeve 72, and is extensible and contractible in the axial direction of the guide sleeve 72.
In an optional scheme of this embodiment, furthermore, a limiting groove is formed on the guide sleeve 72, one end of the guide rod 71 extends into the guide sleeve 72, and the limiting groove cooperates with the limiting member 73 to limit the maximum extension degree of the return elastic member 74.
In an optional scheme of this embodiment, further, a first limiting surface is disposed at an end of the limiting groove away from the fixed hinge pivot 1, and the limiting member 73 is engaged with the first limiting surface to prevent the guide rod 71 from sliding out of the guide sleeve 72.
In at least one embodiment, the guide sleeve 72 is relatively opened with two limiting grooves, the length of the limiting member 73 is greater than the diameter of the guide groove, and the limiting member 73 passes through the guide groove and is limited by the two limiting grooves; the limiting member 73 can be, but not limited to, a limiting pin, and the guide rod 71 and the guide sleeve 72 are connected by the limiting pin; the first power-assisted elastic part 7 is convenient to assemble and disassemble integrally, and the initial installation length is kept by means of self-limiting of large power assistance.
In an alternative embodiment, further, when the pedal assembly 3 is in the initial position, the return elastic member 74 is under a predetermined compressive stress. In at least one embodiment, the return spring 74 is a spring.
In an alternative embodiment, the second elastic assisting component 5 comprises a torsion spring, and the torsion spring is connected with the pedal assembly 3.
In an alternative embodiment, further, the torsion spring is preset with a predetermined force when the pedal assembly 3 is in the initial position, and is used for providing the assisting force for pushing the pedal assembly 3 to the final position.
The invention adopts a double-boosting mode of clutch operation by a pressure spring and a torsion spring, and the separation movement of the clutch is completed by clockwise movement of the pedal assembly 3 around the center of the rotating shaft 4. The rocker arm 6 and the first power-assisted elastic component play a role in returning the pedal before the center of the rotating shaft 4, the rotating hinge fulcrum 2 and the fixed hinge fulcrum 1 move to a straight line, and play a role in assisting power after the point passes through, and the power-assisted action range of the torsion spring on the pedal is selected according to requirements. Therefore, the assistance of the pressure spring and the torsion spring is adopted, and the assistance effect is not influenced by free stroke sensing, so that the assistance size can be adjusted at will. The pure pressure spring assistance is used for obtaining larger assistance, and the larger operating force of the initial position of the clutch pedal is not easy to sense the free stroke, so that the adjustment of the free stroke of the clutch is difficult; the assisting force is too small, the assisting effect is not obvious, and the clutch operating force cannot be effectively reduced.
As shown in fig. 1, pedal force: f ═ F1*L1/L2+T/L2Wherein F is the initial pedal force, F1To assist the initial return force of the resilient member 7, L1Is a moment arm of the force-assisted elastic part 7, L2Is the force arm of the pedal force, and T is the initial assisting force moment of the torsion spring;
as shown in fig. 2, pedal force: f ═ F1*L1＇/L2+T/L2Wherein F is the final pedal force, F1For final assistance of the elastic means 7, L1Arm of force of the resilient member 72Is the force arm of the pedal force, and T is the final assisting force moment of the torsion spring; wherein L is1And L1Are equal.
The power-assisted elastic assembly realizes two functions of initial limit and final limit of the clutch control system, and an additional limit mechanism is cancelled. The pedal has certain return force at the initial position, and the return force generated by the power-assisted elastic component and the torsion spring realizes the initial limit of the clutch control system by means of the limit function of the power-assisted elastic component; the acting force generated by the human foot at the final position is possibly larger than the separating force required by the clutch when the clutch generates separating motion, at the moment, the clutch has the motion trend of continuous separation, the use reliability of the clutch is reduced by the continuous motion, and the continuous separation of the clutch is prevented by the limiting mechanism of the power-assisted spring mechanism, so that the final limiting function of the clutch operating system is realized.
Example 1
The free stroke requirement of the clutch operating pedal is 45mm, and the total stroke of the clutch operating pedal is 225 mm; admas input parameters are that the total travel of a clutch operating pedal is 225mm, the initial spring force (calculated according to a tractor design manual) and the spring stiffness (calculated according to the tractor design manual) of a power-assisted spring mechanism, the initial spring force (calculated according to the tractor design manual) of a torsion spring and the torsional angle stiffness (calculated according to the tractor design manual) of the torsion spring. From the analysis chart, the initial pedal return force of the clutch pedal in fig. 6 is 35N, the final pedal power of the clutch pedal is 75N, and the pedal travel with the zero power value is 95 mm; the invention has the advantages of easy perception of initial force, smooth return of the pedal and obvious final boosting effect. The characteristics of the pedal return force, the final assisting force, the assisting force value being zero and the like are not limited in the embodiment, and can be adjusted according to the clutch separation characteristic and the motion characteristic of clutch operation.
Comparative example 1
Admas analysis of a pure pressure spring boosting clutch operating tractor with a free stroke of 40mm and a full stroke of 205mm for a certain clutch operating pedal is as follows: admas input parameters are that the total stroke of a clutch operating pedal is 205mm, the initial spring force of a spiral spring (basic parameters of a measuring spring are calculated by a tractor design manual) and the spring stiffness (basic parameters of the measuring spring are calculated by the tractor design manual). From the analysis of fig. 7, it can be seen that the initial pedal return force of the clutch pedal is 55N, the final pedal assist force of the clutch pedal is 56N, and the pedal stroke with the assist value of zero is 95 mm. The initial return force of the pedal is basically equivalent to the final assisting force of the pedal, namely the assisting effect and the free stroke perception cannot be considered at the same time.
An embodiment of the second aspect of the present invention provides a tractor (not shown in the figures), which comprises a vehicle body, and further comprises a clutch pedal power-assisted mechanism in any one of the above embodiments, wherein the clutch pedal power-assisted mechanism is mounted on the vehicle body.
The tractor provided by the embodiment of the second aspect of the invention is provided with the clutch pedal boosting mechanism provided by the embodiment of the first aspect of the invention, so that all the beneficial effects of the clutch pedal boosting mechanism provided by the embodiment of the first aspect of the invention are achieved.
The clutch pedal assist mechanism and the tractor according to the present invention have been described above, but the present invention is not limited to the above-described specific embodiments, and various modifications and changes can be made without departing from the scope of the claims. The present invention includes various modifications and alterations within the scope of the claims.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, those skilled in the art will appreciate that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A clutch pedal boosting mechanism comprises a rotating shaft, a pedal assembly and a boosting elastic component, wherein one end of the pedal assembly is rotatably connected with the rotating shaft;
one end of the rocker arm is connected with the pedal assembly, and the other end of the rocker arm is connected with the first power-assisted elastic component through a rotating hinged point and can rotate around the axis of the rotating shaft along with the pedal assembly;
one end of the first power-assisted elastic component, which is far away from the rotating hinge point, is connected with a fixed hinge point fixed on the vehicle body;
along the axial direction of the rotating shaft, the rotating hinge point when the pedal assembly part is at the initial position and the rotating hinge point when the pedal assembly part is at the final position are positioned at two sides of a straight line connecting the rotating shaft and the fixed hinge point;
the second boosting elastic component is connected with the pedal assembly and used for providing boosting force for pushing the pedal assembly to the final position from the initial position, and when the pedal assembly rotates to the final position from the sudden change position around the rotating shaft, the second boosting elastic component plays a boosting role on the pedal.
2. The clutch pedal assist mechanism of claim 1 wherein the rocker arm has a moment arm length of L1 when the pedal assembly is in the initial position; a moment arm length of the rocker arm is L1' when the pedal assembly is in a final position; and L1 is equal to L1'.
3. The clutch pedal assist mechanism according to claim 1, wherein the length of the rocker arm is greater than the length of the first assist elastic member.
4. The clutch pedal assist mechanism according to claim 1, wherein the first assist elastic member includes a guide rod, a guide sleeve, a stopper and a return elastic member;
the guide sleeve is connected with the fixed hinge pivot, the guide rod is connected with the rocker arm, the guide rod is connected with the guide sleeve through the limiting piece, and the guide rod can reciprocate along the axis direction of the guide sleeve;
the return elastic piece is sleeved on the guide rod and the guide sleeve and can stretch along the axis direction of the guide sleeve.
5. The clutch pedal assist mechanism according to claim 4, wherein a limiting groove is formed in the guide sleeve, one end of the guide rod extends into the guide sleeve, and the limiting groove and the limiting piece are matched to limit the maximum extension degree of the return elastic piece.
6. The clutch pedal assist mechanism according to claim 5, wherein a first limiting surface is arranged at one end of the limiting groove, which is far away from the fixed hinge pivot, and the limiting member is matched with the first limiting surface to prevent the guide rod from sliding out of the guide sleeve.
7. The clutch pedal assist mechanism according to claim 4, wherein the return elastic member is pre-stressed in a pressing force when the pedal assembly is in the initial position.
8. The clutch pedal assist mechanism of claim 1 wherein the second assist resilient member comprises a torsion spring coupled to the pedal assembly.
9. The clutch pedal assist mechanism of claim 8 wherein the torsion spring is biased to provide an assist force urging the pedal assembly toward the final position when the pedal assembly is in the initial position.
10. A tractor comprising a vehicle body, characterized by further comprising the clutch pedal assist mechanism of any one of claims 1 to 9, said clutch pedal assist mechanism being mounted to said vehicle body.
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| CN201810173007.1A CN108394275B (en) | 2018-03-01 | 2018-03-01 | Clutch pedal boosting mechanism and tractor |
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| CN201810173007.1A CN108394275B (en) | 2018-03-01 | 2018-03-01 | Clutch pedal boosting mechanism and tractor |
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| CN108394275B true CN108394275B (en) | 2020-11-03 |
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| CN113217558A (en) * | 2021-05-31 | 2021-08-06 | 江苏沃得农业机械股份有限公司 | Tractor clutch control power assisting mechanism and power assisting method |
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| CN203601015U (en) * | 2013-12-10 | 2014-05-21 | 襄阳群龙汽车部件股份有限公司 | Adjustable passive assistant clutch pedal |
| CN203920431U (en) * | 2014-07-04 | 2014-11-05 | 约翰迪尔（天津）有限公司 | With the control linkage of boosting mechanism, unify for the pedal of clutch system of trac. |
| CN106553542A (en) * | 2015-09-24 | 2017-04-05 | 上海汽车集团股份有限公司 | Automobile and its clutch, clutch operating device, clutch pedal assembly |
| CN107199885A (en) * | 2017-05-02 | 2017-09-26 | 贵州省毕节市精工不锈钢制品有限公司 | Clutch power-assisted pedal |
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| CN108394275A (en) | 2018-08-14 |
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