CA2022689C - Pedal pressure relief apparatus - Google Patents
Pedal pressure relief apparatusInfo
- Publication number
- CA2022689C CA2022689C CA 2022689 CA2022689A CA2022689C CA 2022689 C CA2022689 C CA 2022689C CA 2022689 CA2022689 CA 2022689 CA 2022689 A CA2022689 A CA 2022689A CA 2022689 C CA2022689 C CA 2022689C
- Authority
- CA
- Canada
- Prior art keywords
- pedal
- actuating arm
- arm portion
- pressure relief
- relief apparatus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
- G05G1/00—Controlling members, e.g. knobs or handles; Assemblies or arrangements thereof; Indicating position of controlling members
- G05G1/30—Controlling members actuated by foot
- G05G1/48—Non-slip pedal treads; Pedal extensions or attachments characterised by mechanical features only
- G05G1/487—Pedal extensions
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
- G05G7/00—Manually-actuated control mechanisms provided with one single controlling member co-operating with one single controlled member; Details thereof
- G05G7/02—Manually-actuated control mechanisms provided with one single controlling member co-operating with one single controlled member; Details thereof characterised by special provisions for conveying or converting motion, or for acting at a distance
- G05G7/04—Manually-actuated control mechanisms provided with one single controlling member co-operating with one single controlled member; Details thereof characterised by special provisions for conveying or converting motion, or for acting at a distance altering the ratio of motion or force between controlling member and controlled member as a function of the position of the controlling member
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Mechanical Control Devices (AREA)
- Arrangement And Mounting Of Devices That Control Transmission Of Motive Force (AREA)
Abstract
A pedal pressure relief apparatus comprising a pedal which is fitted to a car body rotatably at one end thereof, an actuating arm having a bent shape in which the rotating center of the pedal is disposed inside, one end thereof is fitted rotatably to the middle part of said pedal and another end thereof is a free end, and a tension spring retained by the car body at one end thereof and by the free end of said actuating arm at another end thereof, wherein it is structured so that a line connecting the center of rotation of said actuating arm, the center of rotation of the pedal and the retaining end of the tension spring on the car body side show an almost straight line.
Description
SPECIFICATION
1. TITLE OF THE INVENTION
PEDAL PRESSURE RELIEF APPARATUS
1. TITLE OF THE INVENTION
PEDAL PRESSURE RELIEF APPARATUS
2. FIELD OF THE INVENTION AND RELATED ART STATEMENT
The present invention relates to a pedal pressure relief apparatus for operating a clutch and the like of an automobile.
Conventionally, a return spring using a torsion spring is fitted to a clutch pedal and the like of an automobile so that the worked pedal may be returned easily by means of this return spring. In such a const-ruction, however, there has been such a drawback that a large pedal pressure is required due to the urging force of the spring, and one has a heavy feeling in working the pedal.
Therefore, as a pedal pressure relief apparatus of this type, those that are shown in Fig. 3 and Fig. 4 have been proposed for instance. In the pedal pressure relief apparatus shown in Fig. 3, when a pedal 51 is worked in a direction shown with an arrow mark A, a coupling pin 52 rotates with a support pin 53 as a center and the central point of the coupling pin 52 moves toward a line n-n connecting central points of 2022~89 pivot pins 53 and 54 with each other, thereby compressing a compression spring 55. When the central point of the coupling pin 52 crosses the line n-n, a pressing force of the compression spring 55 acts on the pedal 51 in the direction shown with the arrow mark A, and the pedal pressure on the pedal 51 is relieved.
Further, in a pedal pressure relief apparatus shown in Fig. 4, when a pedal 61 is worked from a return position shown with a solid line in the direction shown with an arrow mark B, an arm 62 rotates in a direction shown with an arrow mark C with a pivot pin 64 as the center through a rod 65. A pivot pin 63b of a pedal arm 66 and an end part 63a of the arm 62 are connected with each other by means of a spring 63. As described above, the arm 62 rotates and the spring 63 extends.
However, the urging force of the spring 63 operates as the force of rotating the arm 62 in the direction shown with an arrow mark C since after the line connecting both ends of the spring 63 passes over the pin 64 which is the center of rotation of the arm 62, and this rotating force acts as a force of relieving the pedal pressure on the pedal 61 through the rod 65.
In the apparatus shown in Fig. 3, however, hysteresis is increased at the working time of the compres-sion spring 55, and the compression spring 55 is liable to become fatigued. In addition, since spring 55 has to be installed after being compressed, the assembly work is troublesome, and even 12 to 13 pieces of parts are required, thus causing disadvantage in point of cost due to numerous number of parts.
Further, in the apparatus shown in Fig. 4, although a spring retaining end portion 63a of the arm 62 moves with working on the pedal 61, the tension of the spring 63 is reduced gradually with the progress of working on the pedal 61 because a retaining end 63b on the side of a pedal shaft 66 is fixed. That is, when such an operation is considered as a rotating force of the arm 62 in the direction shown with an arrow mark C, the foregoing means that the rotating force of the arm 62 reaches a peak in the first half of the pedal stroke and the torque is lowered thereafter. Therefore, a suf-ficient pedal pressure relief effect is unobtainable in the vicinity of the middle of the pedal stroke where the utmost aiding force of the pedal pressure is required.
Moreover, there are such drawbacks that the number of parts is large and the product cost is expensive similarly 20226"''' to the relief apparatus shown in Fig. 3.
The present invention relates to a pedal pressure relief apparatus for operating a clutch and the like of an automobile.
Conventionally, a return spring using a torsion spring is fitted to a clutch pedal and the like of an automobile so that the worked pedal may be returned easily by means of this return spring. In such a const-ruction, however, there has been such a drawback that a large pedal pressure is required due to the urging force of the spring, and one has a heavy feeling in working the pedal.
Therefore, as a pedal pressure relief apparatus of this type, those that are shown in Fig. 3 and Fig. 4 have been proposed for instance. In the pedal pressure relief apparatus shown in Fig. 3, when a pedal 51 is worked in a direction shown with an arrow mark A, a coupling pin 52 rotates with a support pin 53 as a center and the central point of the coupling pin 52 moves toward a line n-n connecting central points of 2022~89 pivot pins 53 and 54 with each other, thereby compressing a compression spring 55. When the central point of the coupling pin 52 crosses the line n-n, a pressing force of the compression spring 55 acts on the pedal 51 in the direction shown with the arrow mark A, and the pedal pressure on the pedal 51 is relieved.
Further, in a pedal pressure relief apparatus shown in Fig. 4, when a pedal 61 is worked from a return position shown with a solid line in the direction shown with an arrow mark B, an arm 62 rotates in a direction shown with an arrow mark C with a pivot pin 64 as the center through a rod 65. A pivot pin 63b of a pedal arm 66 and an end part 63a of the arm 62 are connected with each other by means of a spring 63. As described above, the arm 62 rotates and the spring 63 extends.
However, the urging force of the spring 63 operates as the force of rotating the arm 62 in the direction shown with an arrow mark C since after the line connecting both ends of the spring 63 passes over the pin 64 which is the center of rotation of the arm 62, and this rotating force acts as a force of relieving the pedal pressure on the pedal 61 through the rod 65.
In the apparatus shown in Fig. 3, however, hysteresis is increased at the working time of the compres-sion spring 55, and the compression spring 55 is liable to become fatigued. In addition, since spring 55 has to be installed after being compressed, the assembly work is troublesome, and even 12 to 13 pieces of parts are required, thus causing disadvantage in point of cost due to numerous number of parts.
Further, in the apparatus shown in Fig. 4, although a spring retaining end portion 63a of the arm 62 moves with working on the pedal 61, the tension of the spring 63 is reduced gradually with the progress of working on the pedal 61 because a retaining end 63b on the side of a pedal shaft 66 is fixed. That is, when such an operation is considered as a rotating force of the arm 62 in the direction shown with an arrow mark C, the foregoing means that the rotating force of the arm 62 reaches a peak in the first half of the pedal stroke and the torque is lowered thereafter. Therefore, a suf-ficient pedal pressure relief effect is unobtainable in the vicinity of the middle of the pedal stroke where the utmost aiding force of the pedal pressure is required.
Moreover, there are such drawbacks that the number of parts is large and the product cost is expensive similarly 20226"''' to the relief apparatus shown in Fig. 3.
3.OBJECT AND SUMMARY OF THE INVENTION
It is an object of the present invention which has been made in view of such actual circumstances to provide a pedal pressure relief apparatus which is able to eliminate above-described drawbacks.
According to a broad aspect the present invention provides a pedal pressure relief apparatus, comprising: a pedal member having a pivot point, pivotably connected to a pedal bracket for pivoting with respect to the pedal bracket in a first plane, said pivot point located at one end of said pedal member; an actuating arm including a first actuating arm portion and a second actuating arm portion, said first and second actuating arm portions being connected to form a bent shape member, said first actuating arm portion having a rotatable end, rotatably connected to a middle part of said pedal member so as to permit rotation of the actuating arm in a second plane parallel with but a spaced distance from the first plane, said first actuating arm portion having a length which is substantially equal to a length of said second actuating arm portion, said first actuating arm portion and said second actuating arm portion being disposed relative to one another so as to define an acute angle; and a tension spring disposed substantially in said second plane and having a retaining end connected to said pedal bracket and having a connection end connected to a free end of said second actuating arm portion such that said first actuating arm portion is positioned at one side of said pivot point and said 202268q second actuating arm portion is positioned at an opposite side of said pivot point to position said actuating arm such that said pedal pivot, said rotation end of said first actuating arm and said retaining end of said tension spring lie along a straight line.
4.BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a side view of a pedal provided with a pedal pressure relief apparatus according to the present invention;
Fig. 2 is a front view of the pedal pressure relief apparatus shown in Fig. 1;
Fig. 3 is a side view of a pedal provided with a conventional pedal pressure relief apparatus; and Fig. 4 is a side view of a pedal provided with another conventional pedal pressure relief apparatus.
It is an object of the present invention which has been made in view of such actual circumstances to provide a pedal pressure relief apparatus which is able to eliminate above-described drawbacks.
According to a broad aspect the present invention provides a pedal pressure relief apparatus, comprising: a pedal member having a pivot point, pivotably connected to a pedal bracket for pivoting with respect to the pedal bracket in a first plane, said pivot point located at one end of said pedal member; an actuating arm including a first actuating arm portion and a second actuating arm portion, said first and second actuating arm portions being connected to form a bent shape member, said first actuating arm portion having a rotatable end, rotatably connected to a middle part of said pedal member so as to permit rotation of the actuating arm in a second plane parallel with but a spaced distance from the first plane, said first actuating arm portion having a length which is substantially equal to a length of said second actuating arm portion, said first actuating arm portion and said second actuating arm portion being disposed relative to one another so as to define an acute angle; and a tension spring disposed substantially in said second plane and having a retaining end connected to said pedal bracket and having a connection end connected to a free end of said second actuating arm portion such that said first actuating arm portion is positioned at one side of said pivot point and said 202268q second actuating arm portion is positioned at an opposite side of said pivot point to position said actuating arm such that said pedal pivot, said rotation end of said first actuating arm and said retaining end of said tension spring lie along a straight line.
4.BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a side view of a pedal provided with a pedal pressure relief apparatus according to the present invention;
Fig. 2 is a front view of the pedal pressure relief apparatus shown in Fig. 1;
Fig. 3 is a side view of a pedal provided with a conventional pedal pressure relief apparatus; and Fig. 4 is a side view of a pedal provided with another conventional pedal pressure relief apparatus.
5.DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
The present invention will be described in detail hereafter with reference to an embodiment illustrated in the drawings.
Fig. 1 and Fig 2 show an embodiment of a pedal pressure relief apparatus according to the present invention.
In those figures, a numeral 1 indicates a pedal bracket fixed on a car body side, and an upper end of a pedal 2 is fitted rotatably to this bracket 1 by means of a pedal shaft 3. the pedal 2 consists of a pedal arm 4 and a pedal tread portion 5 2 0 2 2 6 ~, provided at the lower end of the pedal arm 4, and is constructed so as to be rotatable with the pedal shaft 3 as the center.
One end 6a of an actuating arm 6 which is formed in an almost L-shape on the whole is fitted rotatably to the middle part of the pedal arm 4 by means of a pivot pin 7, and a free end 6b is formed at another end of this actuating arm 6. Further, the pedal shaft 3 which is the center of rotation of the pedal 2 is disposed so as to be positioned inside the actuating arm 6. The shape of the actuating arm 6 may be an optional shape such as an almost L-shape, a boomerang shape and the like as shown so far as the pedal shaft 3 can be disposed inside. The pivot pin 7 has a length which is sufficient to rotatably connect the actuating arm 6 to the pedal arm 4 in a manner which allows the actuating arm 6 to pivot in a plane which is parallel with, but spaced from, the pivot plane of the pedal arm 4.
A support pin 8 is protruded on the pedal bracket 1 above said pedal 2, and one end of a tension spring 9 is retained at the point portion of the support pin 8.
Another end of the tension spring 9 is retained at the free end 6b of the actuating arm 6. Here, a line connecting the center of rotation (pivot pin 7) of the actuating arm 6, the center rotation (pedal shaft 3) of the pedal 2 and the retaining end (support pin 8) on the side of the bracket 1 of the tension spring 9 is set to show an almost straight line at a predetermined position (for example, the position of an imaginary line in the figure) in accordance 20226",'~
with working on the pedal 2.
The support pin 8 is required to maintain the spring 9 in the same plane as the plane in which actuating arm 6 rotates.
Besides, in Fig. 1, 10 indicates a clutch cable connected to the point of the pedal 2 at one end thereof, and this clutch cable 10 moves vertically interlocking the rotation of the pedal 2.
In the pedal pressure relief apparatus constructed as described ahove when the pedal 2 is located at a non-working position (a position shown with a solid line in Fig.
1), a resultant force of the tension of the tension spring 9 and the force of the clutch cable 10 in the direction shown with an arrow mark F3 acts in the direction shown with an arrow mark F1. When the pedal 2 is continued to be worked starting from this state, the tension of the tension spring 9 is changed from the direction shown 2~22~8J
with the arrow mark Fl over to the direction shown with the arrow mark F2 with the pedal position (a position shown with a chain line in Fig. 1) where the line con-necting centers of the pivot pin 7, the pedal shaft 3 and the support pin 8 shows an almost straight line as the boundary. With this, a resultant force of the force of the clutch cable 10 and the tension of the tension spring 9 applied in a reverse direction thereto through the actuating arm 6 acts on a pedal tread portion 5 and energizes the pedal 2 in a working direction. Thus, the pedal pressure on the pedal 2 is relieved.
Further, when working on the pedal 2 is released, the tension of the tension spring 9 acts on the pedal 2 in a direction reverse to the working direction through the actuating arm 6. Therefore, the pedal 2 returns to the non-working position.
Since the pedal pressure relief apparatus of the present embodiment is composed of the actuating arm 6, two pieces of pins 7 and 8, and the tension spring 9, sliding portions are less and the number of parts can be reduced by a large margin as compared with a conventional apparatus.
An embodiment of the present invention has 2022~8~
been described above. However, the present invention is not limited to the embodiment which has been described, but variety of modifications and alterations can be made based on the technical concept of the present invention.
For example, the present invention has been applied to the pedal 2 in which a torsion spring which acts as a return spring is not fitted to the pedal shaft 3 in above-said embodiment. However, it is needless to say that the present invention is applicable to the pedal 2 fitted with a torsion spring.
The present invention will be described in detail hereafter with reference to an embodiment illustrated in the drawings.
Fig. 1 and Fig 2 show an embodiment of a pedal pressure relief apparatus according to the present invention.
In those figures, a numeral 1 indicates a pedal bracket fixed on a car body side, and an upper end of a pedal 2 is fitted rotatably to this bracket 1 by means of a pedal shaft 3. the pedal 2 consists of a pedal arm 4 and a pedal tread portion 5 2 0 2 2 6 ~, provided at the lower end of the pedal arm 4, and is constructed so as to be rotatable with the pedal shaft 3 as the center.
One end 6a of an actuating arm 6 which is formed in an almost L-shape on the whole is fitted rotatably to the middle part of the pedal arm 4 by means of a pivot pin 7, and a free end 6b is formed at another end of this actuating arm 6. Further, the pedal shaft 3 which is the center of rotation of the pedal 2 is disposed so as to be positioned inside the actuating arm 6. The shape of the actuating arm 6 may be an optional shape such as an almost L-shape, a boomerang shape and the like as shown so far as the pedal shaft 3 can be disposed inside. The pivot pin 7 has a length which is sufficient to rotatably connect the actuating arm 6 to the pedal arm 4 in a manner which allows the actuating arm 6 to pivot in a plane which is parallel with, but spaced from, the pivot plane of the pedal arm 4.
A support pin 8 is protruded on the pedal bracket 1 above said pedal 2, and one end of a tension spring 9 is retained at the point portion of the support pin 8.
Another end of the tension spring 9 is retained at the free end 6b of the actuating arm 6. Here, a line connecting the center of rotation (pivot pin 7) of the actuating arm 6, the center rotation (pedal shaft 3) of the pedal 2 and the retaining end (support pin 8) on the side of the bracket 1 of the tension spring 9 is set to show an almost straight line at a predetermined position (for example, the position of an imaginary line in the figure) in accordance 20226",'~
with working on the pedal 2.
The support pin 8 is required to maintain the spring 9 in the same plane as the plane in which actuating arm 6 rotates.
Besides, in Fig. 1, 10 indicates a clutch cable connected to the point of the pedal 2 at one end thereof, and this clutch cable 10 moves vertically interlocking the rotation of the pedal 2.
In the pedal pressure relief apparatus constructed as described ahove when the pedal 2 is located at a non-working position (a position shown with a solid line in Fig.
1), a resultant force of the tension of the tension spring 9 and the force of the clutch cable 10 in the direction shown with an arrow mark F3 acts in the direction shown with an arrow mark F1. When the pedal 2 is continued to be worked starting from this state, the tension of the tension spring 9 is changed from the direction shown 2~22~8J
with the arrow mark Fl over to the direction shown with the arrow mark F2 with the pedal position (a position shown with a chain line in Fig. 1) where the line con-necting centers of the pivot pin 7, the pedal shaft 3 and the support pin 8 shows an almost straight line as the boundary. With this, a resultant force of the force of the clutch cable 10 and the tension of the tension spring 9 applied in a reverse direction thereto through the actuating arm 6 acts on a pedal tread portion 5 and energizes the pedal 2 in a working direction. Thus, the pedal pressure on the pedal 2 is relieved.
Further, when working on the pedal 2 is released, the tension of the tension spring 9 acts on the pedal 2 in a direction reverse to the working direction through the actuating arm 6. Therefore, the pedal 2 returns to the non-working position.
Since the pedal pressure relief apparatus of the present embodiment is composed of the actuating arm 6, two pieces of pins 7 and 8, and the tension spring 9, sliding portions are less and the number of parts can be reduced by a large margin as compared with a conventional apparatus.
An embodiment of the present invention has 2022~8~
been described above. However, the present invention is not limited to the embodiment which has been described, but variety of modifications and alterations can be made based on the technical concept of the present invention.
For example, the present invention has been applied to the pedal 2 in which a torsion spring which acts as a return spring is not fitted to the pedal shaft 3 in above-said embodiment. However, it is needless to say that the present invention is applicable to the pedal 2 fitted with a torsion spring.
Claims (2)
1. A pedal pressure relief apparatus, comprising: a pedal member having a pivot point, pivotably connected to a pedal bracket for pivoting with respect to the pedal bracket in a first plane, said pivot point located at one end of said pedal member; an actuating arm including a first actuating arm portion and a second actuating arm portion, said first and second actuating arm portions being connected to form a bent shape member, said first actuating arm portion having a rotatable end, rotatably connected to a middle part of said pedal member so as to permit rotation of the actuating arm in a second plane parallel with but a spaced distance from the first plane, said first actuating arm portion having a length which is substantially equal to a length of said second actuating arm portion, said first actuating arm portion and said second actuating arm portion being disposed relative to one another so as to define an acute angle; and a tension spring disposed substantially in said second plane and having a retaining end connected to said pedal bracket and having a connection end connected to a free end of said second actuating arm portion such that said first actuating arm portion is positioned at one side of said pivot point and said second actuating arm portion is positioned at an opposite side of said pivot point to position said actuating arm such that said pedal pivot, said rotation end of said first actuating arm and said retaining end of said tension spring lie along a straight line.
2. A pedal pressure relief apparatus according to claim 1, wherein at least one of said first actuating arm and said second actuating arm is curved to provide a continuous curved portion from said rotation end to said free end.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9527289U JPH0334119U (en) | 1989-08-11 | 1989-08-11 | |
| JP95272/1989 | 1989-08-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2022689A1 CA2022689A1 (en) | 1991-02-12 |
| CA2022689C true CA2022689C (en) | 1998-08-18 |
Family
ID=14133139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2022689 Expired - Fee Related CA2022689C (en) | 1989-08-11 | 1990-08-03 | Pedal pressure relief apparatus |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH0334119U (en) |
| CA (1) | CA2022689C (en) |
| DE (1) | DE4025147C2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008047318A1 (en) | 2008-09-16 | 2010-04-15 | Volkswagen Ag | Clutch pedal arrangement for motor vehicle, has tension spring directly fastened at bearing block or to fixed component, where force vector reverses during exceeding of middle axis and spring force acting opposite to actuation direction |
| DE102009038051A1 (en) | 2009-08-19 | 2011-02-24 | Volkswagen Ag | Clutch pedal arrangement |
| DE102013216483A1 (en) | 2013-08-20 | 2015-02-26 | Volkswagen Aktiengesellschaft | foot pedal |
| CN106042920B (en) * | 2016-07-08 | 2018-03-30 | 合肥创智汽车技术开发有限公司 | A kind of pedal gear |
| JP7148791B2 (en) * | 2018-09-06 | 2022-10-06 | 有限会社プレテックミヤ | clutch pedal unit |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4911903B1 (en) * | 1968-08-03 | 1974-03-20 | ||
| JPS6033059Y2 (en) * | 1979-09-17 | 1985-10-02 | トヨタ自動車株式会社 | clutch pedal mechanism |
| DE3841719A1 (en) * | 1987-12-22 | 1989-07-06 | Volkswagen Ag | Compression spring device, especially over-centre helper spring device for the foot pedal mechanism of a motor vehicle |
-
1989
- 1989-08-11 JP JP9527289U patent/JPH0334119U/ja active Pending
-
1990
- 1990-08-03 CA CA 2022689 patent/CA2022689C/en not_active Expired - Fee Related
- 1990-08-08 DE DE19904025147 patent/DE4025147C2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2022689A1 (en) | 1991-02-12 |
| JPH0334119U (en) | 1991-04-03 |
| DE4025147A1 (en) | 1991-04-25 |
| DE4025147C2 (en) | 1994-05-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |