JP7390720B2 - pedal drive mechanism - Google Patents

Description

The present invention relates to a pedal drive mechanism.

For example, Patent Document 1 discloses a brake drive device for unmanned automobile operation. This brake drive device has a brake air cylinder for operating a brake pedal. The brake drive device also includes a separate DC motor for operating the accelerator pedal.

Japanese Patent Application Publication No. 5-004566

The brake drive device disclosed in Patent Document 1 operates the brake pedal and the accelerator pedal independently using different drive sources. Therefore, there has been a need for a device that operates the brake pedal and the accelerator pedal with a simple structure.

The present invention has been made in consideration of such circumstances, and an object of the present invention is to provide a pedal drive mechanism that can operate a brake pedal and an accelerator pedal with a simple structure.

In order to solve the above-mentioned problem, the pedal drive mechanism of the present invention is a pedal drive device that is attached to a vehicle and includes a brake pedal and an accelerator pedal that is arranged on the right side of the brake pedal. a cylinder rod that moves between a position, a second position, and a neutral position between the first position and the second position, the cylinder rod being moved between the first position and the neutral position between the first position and the second position; a cylinder that reciprocates the cylinder rod between and the second position; a brake depression section having a depressed state in which the brake pedal is depressed; and a non- depressed state in which the brake pedal is not depressed; and the accelerator pedal. an accelerator depression part having a depression state in which the accelerator pedal is depressed and a non-depression state in which the accelerator pedal is not depressed; the cylinder rod is connected to the brake depression part and the accelerator depression part; If the cylinder rod is between the neutral position and the second position, the brake depression part is in the depression state, the accelerator depression part is in the non-depression state, and the cylinder rod is between the neutral position and the second position. In this case, the brake depression part is in the non-depression state, the accelerator depression part is in the depression state, and when the cylinder rod is in the neutral position, the brake depression part and the accelerator depression part are in the non-depression state. It is equipped with a section and a section.

The pedal drive mechanism of the present invention allows the brake pedal and the accelerator pedal to be operated with a simple structure.

FIG. 1 is an explanatory diagram showing a driver's seat of a dump truck equipped with a pedal drive mechanism that is an embodiment of the pedal drive mechanism of the present invention. FIG. 3 is a perspective view showing a pedal drive mechanism. An overhead view of the pedal drive mechanism in which the brake pedal is in a depressed state. An overhead view of the pedal drive mechanism in which the accelerator depression section is in a depressed state.

Embodiments of the pedal drive mechanism of the present invention will be described based on the accompanying drawings. The pedal drive mechanism of the present invention is installed in various vehicles having an accelerator pedal and a brake pedal arranged to the left of the accelerator pedal. An example of a vehicle is a vehicle-based construction machine such as a dump truck.

FIG. 1 is an explanatory diagram showing a driver's seat of a dump truck 1 equipped with a pedal drive mechanism 6, which is an embodiment of the pedal drive mechanism of the present invention.

FIG. 2 is a perspective view showing the pedal drive mechanism 6.

FIG. 3 is an overhead view of the pedal drive mechanism 6 in which the brake depression portion 85 is in a depressed state.

FIG. 4 is an overhead view of the pedal drive mechanism 6 with the accelerator depression section 95 in a depressed state.

In the following description, "front", "rear", "right", "left", "upper" and "lower" follow the definitions in FIGS. 1 to 4. Note that "front" is the forward direction of the dump truck 1, and "rear" is the backward direction.

Dump truck 1 is a construction machine that has a handle 2 and pedals (both an accelerator pedal and a brake pedal, not shown). The dump truck 1 has an air unit 4, a handle operation unit 5, and a pedal drive mechanism 6 as a remote control device. Air unit 4 has an air compressor and an air tank. The handle operation unit 5 and the pedal drive mechanism 6 are driven by compressed air supplied from the air unit 4 based on control values input by the user. Further, the dump truck 1 has a control unit 7 as an autopilot device. The control unit 7 automatically operates the dump truck 1 by automatically calculating control amounts for the steering wheel 2 and pedals according to the surrounding environment collected by a sensor (not shown).

The handle operation unit 5 and the pedal drive mechanism 6 are installed with a space secured so that the driver can sit on the seat 8. Further, the handle operation unit 5 and the pedal drive mechanism 6 have a mechanism for switching between remote/automatic control and manual control so that the user (driver) sitting on the seat 8 can operate the steering wheel operation unit 5 and the pedal drive mechanism 6. That is, the dump truck 1 has three operation modes: remote control, automatic control, and manual control.

The pedal drive mechanism 6 includes a base 10, an air cylinder 20, a return spring mechanism 30, a cylinder fixture 40, a connection unit 50, a pedal drive shaft 70, a brake depression unit 80, and an accelerator depression unit 90. , has.

The base 10 is a part that constitutes the foundation of the pedal drive mechanism 6. The base 10 supports the cylinder fixture 40, the connection unit 50, and the pedal drive shaft 70.

The air cylinder 20 reciprocates the cylinder rod 21 using air pressure supplied from the air unit 4. The cylinder rod 21 moves between a retracted position (first position), an extruded position (second position), and a neutral position between the retracted and extruded positions. That is, when the air cylinder 20 is supplied with compressed air (driving force) from the air unit 4 (driving source), the air cylinder 20 reciprocates the cylinder rod 21 so as to move between a retracted position, a neutral position, and an extruded position. Exercise.

The air cylinder 20 has an air valve (not shown) in a compressed air supply path from the air unit 4. When the power supply to the air unit 4 is lost (stopped), that is, when compressed air is no longer supplied from the air unit 4 to the air cylinder 20, the air valve releases the compressed air inside the air cylinder 20 and closes the cylinder rod. 21 is brought into a movable neutral state by applying force in the axial direction.

The return spring mechanism 30 mainly includes a spring and a spring rod 32. The spring is housed in the cover 31 and expands and contracts along the axial direction of the spring rod 32. The front end of the spring is fixed to a spring rod 32. The rear end of the spring is fixed to a rear support plate 36. The spring rod 32 passes through the front support plate 34 and the rear support plate 36. The spring rod 32 is fixed to the connecting unit 50 at the front end, and is not fixed to the rear support plate 36 at the rear end. The spring rod 32 receives the restoring force of the spring in the direction of movement toward the rear support plate 36 side. This restoring force is a force in a direction that moves the cylinder rod 21 connected to the spring rod 32 to the retracted position when the cylinder rod 21 is movable.

The cylinder fixture 40 fixes the air cylinder 20 and the return spring mechanism 30 so that the cylinder rod 21 and the spring rod 32 extend substantially in the front-rear direction, and the cylinder rod 21 is located below the spring rod 32. The cylinder fixture 40 holds the air cylinder 20 rotatably around the vertical axis on the rear end 20a side of the air cylinder 20. The cylinder fixture 40 rotatably holds the return spring mechanism 30 around the vertical axis via the rear support plate 36 of the return spring mechanism 30. The cylinder fixture 40 is fixed and supported by the base 10 at the front.

The connection unit 50 (connection section) connects the air cylinder 20 and return spring mechanism 30 (cylinder rod 21) to the brake depression section 85 and the accelerator depression section 95. Specifically, the connection unit 50 connects the cylinder rod 21 and the brake depression portion 85 via the drive shaft rotating portion 82, the pedal drive shaft 70, and the brake side base portion 81. Further, the connection unit 50 connects the cylinder rod 21 and the accelerator depression part 95 via the accelerator side base part 91.

The connection unit 50 includes a rotating part 51, a brake side arm 65, and an accelerator side arm 66.

The rotating part 51 converts the reciprocating motion of the cylinder rod 21 into a rotational motion around the vertical axis. The rotating portion 51 includes a cylinder connecting portion 52, a transmitting portion 55, push-out pins 60a, 60b, and arm connecting portions 61a, 61b.

The cylinder connecting portion 52 has a main body 53 and a connecting shaft 54 .

The main body 53 is a member having a substantially C-shaped longitudinal section and opening toward the rear, and connects the cylinder rod 21 and the spring rod 32 with a connecting shaft 54 . The connecting shaft 54 restrains the front end 21a of the cylinder rod 21 and the front end 32a of the spring rod 32 so as to be rotatable around the vertical axis. Thereby, the spring rod 32 is connected to the cylinder rod 21. The connecting shaft 54 is arranged on the left end 52a side of the cylinder connecting portion 52 when the cylinder rod 21 is in the neutral position.

The transmission section 55 has a main body 56, a pin attachment hole 57, a rotation shaft 58, and a support shaft 59.

The main body 56 is a member having a substantially C-shaped longitudinal section and opening at the front and having an internal space 56a. The main body 56 is located at approximately the center position in the left-right direction of the cylinder connecting portion 52 when the cylinder rod 21 is in the neutral position (hereinafter, the direction may be defined on the assumption that the cylinder rod 21 is in the neutral position). Fixed. The main body 56 has a reference position for rotation around the rotating shaft 58 when the cylinder rod 21 is in the neutral position. When the cylinder rod 21 moves to the retracted position, the main body 56 rotates counterclockwise around the rotation axis 58 from the reference position, and when it moves to the extrusion position, it rotates clockwise from the reference position around the rotation axis 58. .

The pin attachment holes 57 are holes that are formed in two substantially symmetrical locations in the left-right direction of the main body 56 and open in the vertical direction. The rotating shaft 58 is a shaft that is disposed at a substantially central position in the left-right direction of the main body 56 and in front of the pin attachment hole 57, and protrudes upward from the upper surface of the main body 56. The rotating shaft 58 is rotatably supported in a shaft hole 11 formed in the base 10. The support shaft 59 is disposed approximately at the center of the main body 56 in the left-right direction and between the pin attachment hole 57 and the rotating shaft 58 in the front-rear direction. The support shaft 59 has an axial direction extending in the vertical direction, and is disposed in the internal space 56a of the main body 56.

The push-out pins 60a and 60b are a pair of pins whose axial direction is along the up-down direction, and can be inserted into and removed from the pin attachment hole 57 as desired. The push-out pins 60a, 60b consist of a brake-side push-out pin 60a that acts on depression of the brake pedal, and an accelerator-side push-out pin 60b that acts on depression of the accelerator pedal. The structure of the connection unit 50 including the extrusion pins 60a and 60b functions as a release mechanism for disconnecting the cylinder rod 21 from the brake depression section 85 and the accelerator depression section 95.

The arm connecting portions 61a and 61b are a pair of plate-like members consisting of a brake side connecting portion 61a and an accelerator side connecting portion 61b. One ends of the brake-side connecting portion 61a and the accelerator-side connecting portion 61b are rotatably supported by the support shaft 59. The other end of the brake side connecting portion 61a protrudes from the internal space 56a and is connected to the brake side arm 65. The other end of the accelerator side connecting portion 61b protrudes from the internal space 56a and is connected to the accelerator side arm 66. Each arm connecting portion 61a, 61b is in contact with or faces the corresponding extrusion pin 60a, 60b in the front-rear direction with a certain gap therebetween. As a result, each arm connecting part 61a, 61b is pushed out by each extrusion pin 60a, 60b that has moved forward as the rotating part 51 rotates around the rotating shaft 58, and rotates around the supporting shaft 59.

The brake side arm 65 connects the brake side connecting portion 61a and the brake side base portion 81. The accelerator side arm 66 connects the accelerator side connecting portion 61b and the accelerator side base portion 91.

The pedal drive shaft 70 is a shaft that is arranged behind the brake pedal and the accelerator pedal and in front of the connection unit 50 and extends in the left-right direction. The pedal drive shaft 70 is fixed to the base 10 at both ends.

The brake depression unit 80 includes a brake side base portion 81 , a drive shaft rotating portion 82 , and a brake depression portion 85 .

The brake side base 81 (first base) penetrates the pedal drive shaft 70 in a fixed state. The brake side base portion 81 is arranged on the left end side of the pedal drive shaft 70.

Like the brake side base 81, the drive shaft rotation part 82 penetrates the pedal drive shaft 70 in a fixed state, and is arranged on the right end side of the pedal drive shaft 70 and to the right with respect to the accelerator side base 91. . The drive shaft rotating portion 82 has a brake side arm connecting portion 83 on the right end side in the axial direction. The brake-side arm connecting portion 83 extends substantially upward and is connected to the brake-side arm 65 located above.

The brake depression part 85 (one depression part) is connected to the brake side base part 81 at one end, and rotates from this connection point as the brake side base part 81 rotates. Thereby, the brake depression portion 85 has a depression state in which the brake pedal is depressed, and a non- depression state in which the brake pedal is not depressed. The brake depression portion 85 has a brake depression surface 86 and a brake push-out portion 87 . The brake depression surface 86 is a portion that receives a depression operation by a user sitting on the seat 8 when the connection is released by the release mechanism. The brake push-out portion 87 is disposed on the front end side of the brake depression surface 86 opposite to the depression operation surface, and pushes out the brake pedal of the dump truck 1 as the brake depression surface 86 rotates.

The accelerator depression unit 90 has an accelerator side base 91 and an accelerator depression part 95.

The accelerator side base 91 (second base) penetrates the pedal drive shaft 70 in a non-fixed state. The accelerator side base 91 is arranged between the brake side base 81 of the pedal drive shaft 70 and the drive shaft rotating section 82 . The accelerator side base portion 91 has an accelerator side arm connection portion 93 on the right end side in the axial direction. The accelerator arm connecting portion 93 extends substantially upward and is connected to the accelerator arm 66 located above.

The accelerator depression part 95 (the other depression part) is connected to the accelerator side base 91 at one end, and rotates from this connection point as the accelerator side base 91 rotates. Accordingly, the accelerator depression section 95 has a depression state in which the accelerator pedal is depressed, and a non-depression state in which the accelerator pedal is not depressed. The accelerator depression section 95 has an accelerator depression surface 96 and an accelerator push-out section 97 . The accelerator depression surface 96 is a part that receives a depression operation by a user sitting on the seat 8 when the connection is released by the release mechanism. The accelerator pushing part 97 is disposed on the front end side of the accelerator depression surface 96 opposite to the depression operation surface, and pushes out the accelerator pedal of the dump truck 1 as the accelerator depression surface 96 rotates.

In such a pedal drive mechanism 6, the brake depressing part 85 and the accelerator depressing part 95 are arranged at the rear and overlap with the brake pedal and the accelerator pedal in the front-rear direction. Furthermore, the air cylinder 20, the return spring mechanism 30, the cylinder fixture 40, and the connection unit 50 are arranged to the right of the brake pedal and the accelerator pedal so that they do not overlap in the left-right direction.

Next, the operation of the pedal drive mechanism 6 will be explained. First, the operation of the pedal drive mechanism 6 during remote/automatic control will be explained.

In the pedal drive mechanism 6, the air cylinder 20 reciprocates between a retracted position and an extruded position using compressed air from the air cylinder 20 under the control of the control unit 7 in order to press the brake pedal or the accelerator pedal by a required amount. In the return spring mechanism 30, since compressed air as a driving force is supplied to the air cylinder 20 (during the driving force being supplied), the spring rod 32 connected to the cylinder rod 21 by the connecting shaft 54 receives the restoring force of the spring. It is interlocked with the cylinder rod 21 against the force.

The cylinder rod 21 is connected to the brake depression section 85 via the connection unit 50, the drive shaft rotation section 82, the pedal drive shaft 70, and the brake side base section 81. Further, the cylinder rod 21 is connected to an accelerator depression portion 95 via a connection unit 50 and an accelerator side base portion 91. Therefore, as the cylinder rod 21 moves, the brake pedal and the accelerator pedal are operated by the brake depression section 85 and the accelerator depression section 95.

Specifically, as shown in FIG. 3, when the cylinder rod 21 is between the neutral position and the retracted position, the rotating portion 51 is rotated counterclockwise with respect to the reference position. Then, the brake-side connecting portion 61a is pushed out by the brake-side push-out pin 60a, thereby causing the brake-side connecting portion 61a to rotate around the support shaft 59. The brake-side connecting portion 61a pushes out the connected brake-side arm 65, and the brake-side arm 65 rotates the drive shaft rotating portion 82. Since the drive shaft rotating portion 82 is fixed to the pedal drive shaft 70, the rotation of the pedal drive shaft 70 causes the brake side base portion 81, which is also fixed, to rotate. Finally, the brake depressing part 85 rotates toward the front brake pedal starting from the brake side base 81, so that the brake pushing part 87 depresses the brake pedal. That is, when the cylinder rod 21 is between the neutral position and the retracted position, the connection unit 50 rotates the drive shaft rotation part 82 around the pedal drive shaft 70 to bring the brake depression part 85 into the depression state. On the other hand, when the cylinder rod 21 is between the neutral position and the retracted position, the accelerator depression portion 95 is in a non-depression state, with no driving force being transmitted by the connection unit 50.

As shown in FIG. 4, when the cylinder rod 21 is between the neutral position and the extrusion position, the rotating part 51 is in a state of being rotated clockwise with respect to the reference. Then, the accelerator-side connecting portion 61b is pushed out by the accelerator-side push-out pin 60b, so that the accelerator-side connecting portion 61b rotates around the support shaft 59. The accelerator side connecting portion 61b pushes out the connected accelerator side arm 66, and the accelerator side arm 66 rotates the accelerator side base 91. Since the accelerator side base 91 is not fixed to the pedal drive shaft 70, only the accelerator side base 91 rotates without the pedal drive shaft 70 rotating. Finally, the accelerator depression part 95 rotates toward the front accelerator pedal from the accelerator side base 91, so that the accelerator push-out part 97 depresses the accelerator pedal. That is, when the cylinder rod 21 is between the neutral position and the pushed-out position, the connection unit 50 rotates the accelerator side base 91 around the pedal drive shaft 70, thereby placing the accelerator depression part 95 in the depressed state. On the other hand, when the cylinder rod 21 is between the neutral position and the pushed-out position, the brake depression portion 85 is in a non-depression state as no driving force is transmitted by the connection unit 50 .

Further, when the cylinder rod 21 is in the neutral position, the rotating part 51 is in the reference position, and both the brake depression part 85 and the accelerator depression part 95 are not driven and are in a non-depression state.

Next, the operation of the pedal drive mechanism 6 when switching from remote/automatic control to manual control will be explained.

The pedal drive mechanism 6 switches from remote/automatic control to manual control when the push-out pins 60a, 60b serving as release mechanisms are removed. That is, the pedal drive mechanism 6 converts the reciprocating motion of the cylinder rod 21 into a rotational motion in the connection unit 50 and transmits it to the brake depression unit 80 and the accelerator depression unit 90. However, in the connection unit 50, when the push-out pins 60a and 60b are removed, the connection between the cylinder rod 21 and the brake depression section 85 and the accelerator depression section 95 is released. Specifically, the connection unit 50 does not transmit the driving force caused by the rotation of the rotating part 51 to the brake side connection part 61a and the accelerator side connection part 61b. Thereby, the pedal drive mechanism 6 can be switched to manual operation in which the brake depression unit 80 and the accelerator depression unit 90 are driven by the user's depression operation received via the respective depression surfaces 86 and 96.

Next, the operation of the pedal drive mechanism 6 when the operation of the air cylinder 20 is unintentionally stopped due to an abnormality such as loss of power to the air unit 4 will be described.

When the operation of the air unit 4 is unexpectedly stopped and compressed air is no longer supplied to the air cylinder 20 (when driving force is not supplied), the compressed air inside the air cylinder 20 is released by the air valve. The cylinder rod 21 is in a movable neutral state. Then, the spring rod 32 receives the restoring force of the spring and moves toward the rear support plate 36 side. Since the spring rod 32 and the cylinder rod 21 are connected by the connecting shaft 54, as the spring rod 32 moves, the cylinder rod 21 also moves rearward. That is, the spring rod 32 receives a restoring force in the direction of moving the cylinder rod 21 to the retracted position, and moves the cylinder rod 21. As a result, when compressed air is not supplied to the air cylinder 20, the return spring mechanism 30 functions to move the cylinder rod 21 to the retracted position, so that the brake depression portion 85 can be in the depressed state. Therefore, the dump truck 1 can be stopped safely.

Such a pedal drive mechanism 6 connects one air cylinder 20 to the brake depression unit 80 and the accelerator depression unit 90 through the connection unit 50, so that the brake pedal and the accelerator pedal can be operated with a simple structure. Furthermore, since the pedal drive mechanism 6 has a return spring mechanism 30, if the air unit 4 unexpectedly stops operating and compressed air is no longer supplied, such as when the power is lost, the pedal drive mechanism 6 uses the restoring force of the spring. The dump truck 1 can be safely stopped by operating the brake pedal.

Furthermore, the air cylinder 20, the return spring mechanism 30, and the connection unit 50 are arranged on the right side with respect to the seat 8. The brake depression unit 80 and the accelerator depression unit 90 are arranged in front of the seat 8 and to the left of the air cylinder 20, the return spring mechanism 30, and the connection unit 50. That is, in the pedal drive mechanism 6, each of the depression surfaces 86 and 96 of the brake depression unit 80 and the accelerator depression unit 90 are arranged so as to be operable by a user sitting on the seat 8. Further, the pedal drive mechanism 6 includes push-out pins 60a and 60b (release mechanism) for easily switching between remote/automatic control and manual control. Therefore, the pedal drive mechanism 6 can realize an override mechanism that instantly switches to manual operation even during remote/automatic operation with the pedal drive mechanism 6 attached to the dump truck 1.

Although several embodiments of the invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the gist of the invention. These and their modifications are included within the scope and gist of the invention, as well as within the scope of the invention described in the claims and its equivalents.

Although compressed air is used as the driving source for the cylinder, any known driving source other than compressed air may be used.

The drive shaft rotating portion 82 and the brake side base portion 81 that operate in conjunction with the pedal drive shaft 70 may be part of the pedal drive shaft 70 .

Although the pedal drive mechanism 6 has been described in which the air cylinder 20, the return spring mechanism 30, and the connection unit 50 are arranged on the right side with respect to the seat 8, they may be arranged on the left side with respect to the seat 8. In this case, the pedal drive mechanism includes an accelerator side base (first base) that passes through the pedal drive shaft in a fixed state and connects with the accelerator depression part, and an accelerator side base (first base) that passes through the pedal drive shaft in a non-fixed state and brake The brake pedal includes a brake-side base (second base) that connects to the brake pedal, and a drive shaft rotation unit that penetrates the pedal drive shaft in a fixed state and is disposed adjacent to the brake pedal in the left direction. . The connection unit (connection section) connects the cylinder rod and the accelerator depression section via the drive shaft rotating section, the pedal drive shaft, and the accelerator side base, and connects the cylinder rod and the brake depression section via the brake side base. Connecting. Furthermore, the connection unit brings the accelerator depression part into the depressed state by rotating the drive shaft rotating part around the pedal drive shaft, and puts the brake depression part into the depression state by rotating the brake side base part about the pedal drive shaft.

1 Dump truck 2 Handle 4 Air unit 5 Handle operation unit 6 Pedal drive mechanism 7 Control unit 8 Seat 10 Base 11 Shaft hole 20 Air cylinder 21 Cylinder rod 30 Return spring mechanism 31 Cover 32 Spring rod 34 Front support plate 36 Rear support plate 40 Cylinder fixture 50 Connecting unit 51 Rotating part 52 Cylinder connecting part 53 Main body 54 Connecting shaft 55 Transmitting part 56 Main body 56a Internal space 57 Pin mounting hole 58 Rotating shaft 59 Support shaft 60a Brake side extrusion pin 60b Accelerator side extrusion pin 61a Brake side Connection part 61b Accelerator side connection part 65 Brake side arm 66 Accelerator side arm 70 Pedal drive shaft 80 Brake depression unit 81 Brake side base 82 Drive shaft rotation part 83 Brake side arm connection part 85 Brake depression part 86 Brake depression surface 87 Brake pushing part 90 Accelerator depression unit 91 Accelerator side base 93 Accelerator side arm connection part 95 Accelerator depression part 96 Accelerator depression surface 97 Accelerator push-out part

Claims (4)

A pedal drive device that is attached to a vehicle and includes a brake pedal and an accelerator pedal located to the right of the brake pedal,
It has a cylinder rod that moves between a first position, a second position, and a neutral position between the first position and the second position, and the first position is moved by a driving force from a driving source. a cylinder that reciprocates the cylinder rod between the position and the second position;
a brake depression section having a depression state in which the brake pedal is depressed and a non- depression state in which the brake pedal is not depressed;
an accelerator depression section having a depression state in which the accelerator pedal is depressed and a non- depression state in which the accelerator pedal is not depressed;
The cylinder rod is connected to the brake depression part and the accelerator depression part, and when the cylinder rod is between the neutral position and the first position, the brake depression part is brought into the depression state, and the accelerator depression part is brought into the depression state. the depressing part is in the non-depressing state, and when the cylinder rod is between the neutral position and the second position, the brake depressing part is in the non-depressing state, and the accelerator depressing part is in the depressing state, A pedal drive mechanism, comprising: a connection part that brings the brake depression part and the accelerator depression part into the non-depression state when the cylinder rod is in the neutral position. Further comprising a return spring mechanism having a spring and a spring rod receiving the restoring force of the spring,
The connecting portion connects the cylinder rod and the spring rod,
the cylinder allows the cylinder rod to move when the driving force is not supplied;
The spring rod interlocks with the cylinder rod against the restoring force when the driving force is supplied, and applies the restoring force in a direction to move the cylinder rod to the second position when the driving force is not supplied. 2. The pedal drive mechanism according to claim 1, wherein the pedal drive mechanism receives a pedal drive mechanism. a pedal drive shaft disposed behind the brake pedal and the accelerator pedal and extending in the left-right direction;
a first base that penetrates the pedal drive shaft in a fixed state and connects to one of the brake depression part and the accelerator depression part;
a second base that penetrates the pedal drive shaft in a non-fixed state and connects to the other of the brake depression part or the accelerator depression part;
further comprising: a drive shaft rotation part that penetrates the pedal drive shaft in a fixed state and is disposed adjacent to the other stepping part in the left and right direction;
The connecting portion is
Connecting the cylinder rod and the one stepping part via the drive shaft rotation part, the pedal drive shaft and the first base part,
connecting the cylinder rod and the other stepping portion via the second base;
by rotating the drive shaft rotation part around the pedal drive shaft, the one depression part is brought into the depression state;
The pedal drive mechanism according to claim 1 or 2, wherein the other depression section is brought into the depression state by rotating the second base part around the pedal drive shaft. The connecting part has a release mechanism that releases the connection between the cylinder rod, the brake depression part, and the accelerator depression part,
The pedal drive mechanism according to any one of claims 1 to 3, wherein the brake depression section and the accelerator depression section each have a depression surface that accepts a depression operation by a user when the connection is released.

Images