JPH0649734U - Accelerator pedal overload prevention mechanism - Google Patents

Abstract

(57) [Summary] [Purpose] The accelerator pedal has a characteristic that it does not operate during normal accelerator operation but operates when the throttle valve is locked, and the structure is simple and easy to assemble, and initial power adjustment is easy. It is to provide a load prevention mechanism. An initial power applying member for fixing an end of a leaf spring integrally having a wire engaging portion to an accelerator pedal arm and elastically deforming the vicinity of the wire engaging portion of the leaf spring is provided on the accelerator pedal arm. Alternatively, a member for applying an initial power capable of elastically deforming a desired amount is attached.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vehicle accelerator pedal overload prevention mechanism.

[0002]

[Prior art and its technical problem]

 In a carburetor system of a gasoline automobile, a throttle valve for adjusting the inflow amount of air and fuel is arranged in an intake passage, and the throttle valve is connected to an arm end of an accelerator pedal via a wire. In this accelerator pedal, the accelerator arm is tilted by stepping on the pedal surface at the other end of the arm, and the throttle valve opening is adjusted by pulling the wire, but after the throttle valve reaches the full throttle angle, the accelerator pedal is further moved. If the dull is stepped on, there is a risk that the throttle valve will be destroyed by the overload transmitted from the wire. As a countermeasure against this, an accelerator pedal with an overload prevention mechanism is known that does not work under normal accelerator pedal depression load and prevents the throttle valve from being pulled by the wire when the throttle valve locks. There is.

As a mechanism for preventing overload of the accelerator pedal, conventionally, as shown in FIG. 9, a rubber-like elastic body 101 is attached to the upper part of the accelerator pedal arm 100, and a wire 3 is inserted through the rubber-like elastic body 101. It is known that a rubber-like elastic body 101 is fixed to the rear end of a compression piece 102 that can be compressed from the back side. As another mechanism, as shown in FIG. 10, a cantilever pin 103 extending in a direction intersecting the pedal axis is attached to the upper portion of the accelerator pedal arm 100, and the cantilever pin 103 has a receiving metal fitting 104 having a connecting portion for the wire 3. Is rotatably mounted, a torsion coil spring 105 is arranged around the cantilever pin in the receiving metal fitting 104, one end 106 of the spring 105 is locked to the accelerator pedal arm side, and the other end 107 is fixed. A structure in which the metal fitting 104 is locked is known. However, the former has a simple structure, but since the wire 3 compresses the rubber-like elastic body 101 via the compression piece 102 when the accelerator is operated, elastic force is applied from before the full throttle of the throttle valve, that is, at the time of initial movement. To pull the throttle wire. For this reason, there was a problem that the throttle response deteriorated. On the other hand, the latter has a good response because it does not operate at normal throttle, but it requires a large number of parts such as cantilever pins, retaining parts, brackets and torsion springs, and the shape of the bracket is complicated. Since they had to be assembled, there was a problem that the cost was high. Moreover, it is difficult to assemble, and it is especially difficult to hook both ends of the torsion coil spring against the repulsive force on the pedal side and the bracket side, and at that time there is a high risk of injury to hands and fingers. was there. In addition, in any of the prior arts, it is necessary to replace the rubber-like elastic body or the torsion spring itself in order to adjust the initial power for preventing overload, which is complicated and lacks freedom.

The present invention has been devised to solve the above problems, and a first object thereof is to have a characteristic that it does not operate during normal accelerator operation but operates when the throttle valve is locked. Another object of the present invention is to provide an accelerator pedal overload prevention mechanism that is simple in structure, easy to assemble, and inexpensive. In addition to the first object, a second object of the present invention is to provide an overload prevention mechanism for an accelerator pedal in which the initial power can be easily adjusted.

[0005]

[Means for Solving the Problems]

 In order to achieve the above first object, the present invention is to fix an end of a leaf spring integrally having a wire locking portion to an accelerator pedal arm, and to the accelerator pedal arm in the vicinity of a wire locking portion of a plate spring. An initial power applying portion for elastically deforming is provided. In order to achieve the second object, the present invention fixes an end of a leaf spring integrally having a wire locking portion to an accelerator pedal arm, and the accelerator pedal arm is provided near a wire locking portion of a plate spring. A member for applying initial power that can elastically deform the desired amount is attached. A typical initial power application member is a protrusion, and a typical initial power application member is a push bolt.

[0006]

【Example】

 An embodiment of the present invention will be described below with reference to the accompanying drawings. 1 to 4 show an embodiment of an accelerator pedal overload prevention mechanism according to the present invention. In FIG. 1, 1 is an accelerator pedal arm, 2 is a throttle valve, 3 is a throttle valve 2 and an accelerator pedal arm 1. Wires (cables) for connecting the wires 3 and 4 are leaf springs for locking the wire 3. In this embodiment, the accelerator pedal arm 1 is made of synthetic resin or a composite material of synthetic resin and reinforcing fiber and has a groove-shaped cross section, and a tread surface portion 1a is formed at the lower portion in the longitudinal direction. As shown in FIGS. 1 and 2, a cylindrical hole-shaped rotation fulcrum portion 1b is formed in the middle portion, and the shaft 8 is penetrated through the rotation fulcrum portion 1b to be supported by the bracket 9. Can be tilted.

As shown in FIGS. 1, 2 and 3, the accelerator pedal arm 1 has a web and a flange integrally formed with the rib 1c below the rotation fulcrum portion 1b, and is formed above the rotation fulcrum portion 1b. The web is missing. A support wall 1d is formed in the upper end area of the accelerator pedal arm 1 and is bent from the side opposite to the tread surface to the top surface. The support wall 1d has a slot 10 for fitting the cable 3 in the center and a slot 10 rather than the slot 10. Stopper portions 11, 11 extending downward are provided. The support wall 1d may be separated left and right, and the stopper portions 11 and 11 are not limited to being separated left and right as shown in FIG. On the other hand, a boss portion 12 is formed on the side of the support wall 1d opposite to the stopper portions 11 and 11 via a rib connecting the flanges, and a spring receiving wall 13 is formed in the middle of the groove of the accelerator pedal arm 1. Is formed, and an opening 14 for inserting a leaf spring and for attaching the stopper piece 30 is formed between the boss portion 12 and the top end of the support wall, and the spring receiving wall 13 and the stopper portions 11, 11 are formed. A leaf spring working space 17 is formed between them. Further, a fixing seat portion 15 connecting the flanges is formed near the rotation fulcrum portion 1b. A support 16 is formed near the fixing seat 15 so as to connect the flanges, and the leaf spring 4 is inserted between the tip surface of the support 16 and the upper surface of the fixing seat 15. There is a gap to allow. Bolt mounting holes 120 and 150 are provided in the boss portion 12 and the fixing seat portion 15, respectively.

The leaf spring 4 has a length sufficient for the tip end to be positioned behind the stopper wall 11, 11 behind the support wall with the rear end positioned on the fixing seat portion 15. An engaging portion 40 of the stopper piece 30 fixed to the end portion of the wire 3 is provided in the portion, and a through hole 41 corresponding to the bolt mounting hole 150 is provided in the rear end portion. The locking portion 40 is curved or bent, and a slit 400 for inserting the wire 3 is provided in the center portion in the width direction. The leaf spring 4 is inserted into the groove through the opening 14, and the rear end portion is positioned on the fixing seat portion 15 through the gap between the front end surface of the support 16 and the upper surface of the second boss portion 15, and the washer 7 It is fixed by the fixing bolt 5 which passes through the through hole 41 and the bolt mounting hole 150 via the. On the other hand, in the bolt mounting hole 120 of the boss portion 12, there is a push bolt 6 as a member for initial power application that pushes the vicinity of the wire locking portion of the leaf spring 4 from the front side to elastically deform the desired amount. Is screwed from.

FIG. 5 shows another embodiment of the present invention, in which a boss portion 12, a spring receiving wall 13, and a second boss portion 15 are formed in series, and a washer is a bolt. It is integrated with. FIG. 6 shows another embodiment of the present invention. In this embodiment, the initial power applying portion for elastically deforming by pressing the vicinity of the wire locking portion of the leaf spring 4 from the front side is a spring bearing. The projection 6 ′ is integrally formed with the wall 13. The fixing seat portion 15 may be provided in two or more places, and when fixing the leaf spring 4 in several positions in the width direction, a plurality of through holes of the leaf spring 4 are provided and the fixing seat portion 15 is provided. The bolt mounting hole 120 may be provided at one location, for example, the center of the fifteenth portion, and a boss may be provided at the other portion. Furthermore, the fixing method of the leaf spring 4 is not limited to the bolt tightening, and may be adhesion, insert molding, or the like. FIG. 7 shows an embodiment in which the leaf spring 4 is fixed by the insert molding method, and the rear end portion of the leaf spring 4 is inserted between the support 16 and the end portion 13 ′ of the spring receiving wall 13. It is fixed in shape. Reference numeral 19 is an opening for mounting and dismounting a core that forms a space for elastic deformation of the leaf spring 4. In FIG. 1, reference numeral 18 is a stopper on the body side.

[0010]

[Operation of the embodiment]

 To assemble in the embodiment of FIGS. 1 to 5, the leaf spring 4 is inserted and set from the opening 14 of the accelerator pedal arm 1, and is fixed together with the washer 7 with the bolt 5. Then, when the push bolt 6 is tightened, the push bolt 6 projects, so that the leaf spring 4 is elastically deformed, and the initial power is set as shown in FIGS. 2 and 5. After that, the accelerator pedal arm 1 may be attached to the bracket 9, attached to the body of the vehicle, the wire 3 may be inserted into the slot 10 of the supporting wall 1d, and the stopper piece 30 may be hooked on the locking portion 40 of the leaf spring 4. Therefore, it is very easy to assemble, and it is safe because it does not engage with levers against the reaction force of the spring. Further, the initial dynamic force can be freely set by adjusting the screwing of the push bolt 6. In FIG. 1, when the tread surface 1a of the accelerator pedal arm 1 is depressed, the upper portion of the accelerator pedal arm 1 tilts clockwise with the pivotal support of the bracket 9 as a fulcrum. As a result, the wire 3 is pulled through the leaf spring 4, but since the leaf spring 4 is already provided with a repulsive force, the leaf spring 4 is not deformed under a normal load and remains in the state of FIG. When the wire 3 is pulled, the throttle valve 2 tilts. Then, when a load is further applied to the tread portion 1a and the throttle valve 2 reaches the maximum tilt angle and reaches the locked state, the traction force that acts on the leaf spring 4 from the wire 3 increases rapidly. Therefore, the leaf spring 4 is elastically deformed as shown by the phantom lines in FIGS. 1 and 2, whereby the tension of the wire 3 is relaxed and the throttle valve 2 is protected from breakage. In the embodiment of FIG. 6, since the protrusion 6'as the initial power applying portion is integrally formed with the accelerator pedal arm 1, the number of parts can be reduced. The initial power cannot be adjusted up to this point, but by allowing the amount of protrusion of the protrusion 6'to be variable with the mold, one mold can support multiple models.

FIG. 8 shows the results of a field test of the overload prevention mechanism according to the present invention and the conventional overload prevention mechanism. Incidentally, the conventional product 1 is a rubber-like elastic body type, and the conventional product 2 is a torsion spring type. As is apparent from FIG. 7, the conventional product 1 has poor responsiveness because it works from a low load, whereas the conventional product 2 and the device of the present invention operate when the load exceeds a certain load. Moreover, it can be seen that the product of the present invention has less hysteresis than the conventional product 2 and has good accuracy. When the support 16 is provided in the vicinity of the fixing seat 15, it is possible to avoid stress concentration on the bolt 5 when the deformation of the leaf spring 4 starts, and the bolt 5 is loosened. Sometimes it is possible to activate the overload prevention function. Further, the stopper portions 11, 11 of the support wall 11d face the front side of the deformed side of the leaf spring 4. Therefore, even if a strong pulling force acts on the wire 3 and the leaf spring 4 is deformed, it will not be deformed any more when it comes into contact with the stopper portions 11, 11. Therefore, no functional failure due to excessive deformation of the plate bar 4 occurs.

[0012]

[Effect of device]

 According to the first aspect of the present invention described above, the overload preventing mechanism does not operate when the accelerator is normally used, and the basic function that operates only when the throttle body is locked at the full throttle is ensured and the parts are The number is small and the structure is simple, and even when assembled, it can be easily and safely performed without applying a biasing force to the springs, so that it has an excellent effect that cost can be reduced. According to the second aspect, it is possible to obtain an excellent effect that the initial power can be set easily and the initial power can be freely changed.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing an embodiment of an accelerator pedal overload preventing mechanism according to the present invention.

FIG. 2 is a partially enlarged view of FIG.

FIG. 3 is an enlarged front view of FIG.

FIG. 4 is a rear view of FIG.

FIG. 5 is a partial vertical sectional side view showing another embodiment of the present invention.

FIG. 6 is a partial vertical cross-sectional side view showing another embodiment of the present invention.

FIG. 7 is a partial vertical sectional side view showing another embodiment of the present invention.

FIG. 8 is a diagram showing the results of a load-displacement test for the product of the present invention and the conventional product.

FIG. 9 is a partially cutaway side view of a conventional accelerator pedal overload prevention mechanism.

FIG. 10 is a partially enlarged view of a conventional accelerator pedal overload prevention mechanism.

[Explanation of symbols]

 1 accelerator pedal arm 4 leaf spring 6 push bolt 6'projection 30 stopper 40 locking part

Claims (3)

[Scope of utility model registration request] 1. An initial power applying portion for fixing an end portion of a leaf spring integrally having a wire engaging portion to an accelerator pedal arm and elastically deforming the vicinity of the wire engaging portion of the leaf spring for the accelerator pedal arm. An accelerator pedal overload prevention mechanism characterized by being provided with. 2. An initial power for fixing an end portion of a leaf spring integrally having a wire locking portion to an accelerator pedal arm and elastically deforming the accelerator pedal arm in the vicinity of the wire locking portion of the leaf spring by a desired amount. An accelerator pedal overload prevention mechanism characterized in that an applying member is attached. 3. The accelerator pedal overload preventing mechanism according to claim 1, wherein the accelerator pedal arm includes a stopper for preventing excessive deformation of the leaf spring.