JPH0675018U - Operation pedal device - Google Patents

Abstract

(57) [Summary] [Structure] The first link 22a and the second link 2 are attached to the link support bracket 19a fixed to the cab floor 16.
Each one end of 3a is pivotally supported by the first link support shaft 20 and the second link support shaft 24, and the first link 22a,
The other end of the second link 22b is connected to both links 22a and 23a.
Are pivotally supported by pins 26a and 27a so as to be substantially parallel to each other, a pedal main body 28a is provided above the pedal support link 25a, and a reach rod connecting bracket 33a is fixed to the first link 22a. [Effect] Pedal support link 25a, first link 22
a, the second link 23a, the link support bracket 19a
Since the parallelogram link mechanism is formed by the above, the pedal upper surface angle of the pedal body 28a does not change regardless of the stepping amount.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an operation pedal device.

[0002]

[Prior art]

 FIGS. 4 and 5 show an example of a conventional operation pedal device. 1 is a driver's cab floor of a construction machine in which the operation pedal device is installed, and 2 is a hollow operation lever stand with an open bottom. The operation lever stand 2 is erected on the upper surface of the front A side end of the cab floor 1.

An arm insertion hole 3 is provided in the lower part of the rear B side end surface of the operation lever stand 2, and a rod insertion hole 4 is provided in the cab floor 1.

Reference numeral 5 denotes an arm support bracket fixed to an upper part of the inside of the operation lever stand 2, 6 is a pedal support arm having a curved side surface, and one end of the pedal support arm 6 is at the operation lever stand 2 Is inserted into the arm insertion hole 3 so that the other end is located on the rear B side of the operation lever stand 2.

One end of the pedal support arm 6 is pivotally supported on the arm support bracket 5 by a pin 7 extending substantially horizontally in the left-right direction of the cab floor 1, and the other end of the pedal support arm 6 is provided with a pedal. The body 8 is fixed.

Reference numeral 9 denotes a connecting rod that extends substantially vertically. The connecting rod 9 is inserted into the rod insertion hole 4 and its upper end is near one end of the pedal support arm 6 (near the pivot point of the pin 7). It is pivotally attached by a pin 10 parallel to the pin 7.

Reference numeral 11 is a link support bracket, and the link support bracket 11 is provided below the cab floor 1 so as to be located substantially below the pedal body 8.

Reference numeral 12 is a link having a substantially L-shaped side surface, and an intermediate portion of the link 12 is pivotally supported by a link support bracket 11 by a pin 13 parallel to the pin 7.

A lower end of the connecting rod 9 is pivotally attached to one end of the link 12 by a pin 14 parallel to the pin 7, and a pin hole 15 provided at the other end of the link 12 has a remote end not shown. The end of the reach rod of the machine to be operated (for example the reach rod of the winch braking device) is connected.

Further, the link 12 is urged to the rear B side by the other end operation rod connecting end of the link 12 by an elastic body such as a spring (not shown). Normally, as shown in FIG. The other end of the support arm 6 on which the pedal body is supported protrudes largely to the rearward B side of the operation lever stand 2, and the pedal body 8 is positioned above.

In the operation pedal device having the above-described configuration, when the driver steps on the pedal body 8, the pedal body 8 moves downward and the pedal support arm 6 is centered around the pin 7 in FIG. It rotates counterclockwise and the connecting rod 9 moves upward.

When the connecting rod 9 moves upward, the link 12 rotates about the pin 13 counterclockwise in FIG. 4, and the reach rod of the machine to be remotely operated connected to the other end of the link 12 is moved. Move to the front A side.

On the other hand, when the driver releases his / her foot from the pedal body 8, the link 12 pivots clockwise around the pin 13 in FIG. When the reach rods connected to each other return to the rear B side, the connection rod 9 moves downward.

When the connecting rod 9 moves downward, the pedal support arm 6 rotates clockwise around the pin 7 in FIG. 4, and the pedal body 8 moves upward.

[0015]

[Problems to be solved by the device]

 However, in the operation pedal device shown in FIGS. 4 and 5, the pedal body 8 is fixed to the other end of the pedal support arm 6 whose one end is pivotally supported by the pin 7. When the pedal 8 is depressed, the pedal upper surface angle α of the pedal body 8 with respect to the horizontal line H increases as the amount of depression of the pedal body 8 increases.

Therefore, depending on the physique of the driver who operates the operation pedal device, it may be very difficult to operate the pedal body 8, and it may not be possible to operate the operation pedal device efficiently.

The present invention has been made in view of the above situation, and an object thereof is to provide an operation pedal device in which the pedal upper surface angle of the pedal body does not change regardless of the amount of depression of the pedal body.

[0018]

[Means for Solving the Problems]

 In order to achieve the above object, in the operation pedal device of the present invention, the link support bracket fixed to the fixed structure portion and one end thereof is pivotally supported by the first support shaft which is substantially horizontal to the link support bracket. A first link; a second link whose one end is pivotally supported on the link support bracket by a second support shaft substantially parallel to the first support shaft; A pedal support link that pivots the other ends of the second links by third and fourth support shafts that are substantially parallel to the first support shaft so that both links are substantially parallel, and the pedal support link. A pedal body provided on an upper portion of the link and a reach rod connecting bracket which is fixed to at least one of the first and second links and is connectable to a reach rod of a machine to be remotely operated. There is.

[0019]

In the operation pedal device of the present invention, since the parallelogram link mechanism is formed by the pedal support link, the first link, the second link, and the link support bracket, the pedal main body provided on the pedal support link. The pedal upper surface angle of the pedal body does not change regardless of how much the pedal is depressed.

[0020]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 show an embodiment of an operation pedal device of the present invention, 16 is a cab floor portion of a construction machine in which the operation pedal device is installed. Are provided with link insertion holes 17a and 17b.

Reference numeral 18 denotes a bracket mounting seat, and 19 a, 19 b, and 19 c denote link support brackets. The bracket mounting seat 18 of the cab floor 1 is located closer to the rear B side than the link insertion hole 17. The link support brackets 19a, 19b and 19c are fixed to the lower surface and are attached to the end surface of the bracket mounting seat 18 on the front A side substantially parallel to each other.

Reference numeral 20 denotes a first link support shaft. The first link support shaft 20 extends in the left-right direction of the driver's cab floor 16 and holds the link support brackets 19 a, It is attached to 19b and 19c.

Reference numerals 21a and 21b are rotary cylinders having a hollow structure. The rotary cylinder 21a is rotatable with respect to the first link support shaft 20 so as to be located between the link support brackets 19a and 19b. The first link support shaft 20 is fitted onto the first link support shaft 20 so as not to move in the axial direction, and the rotary cylinder 21b is positioned between the link support brackets 19b and 19c with respect to the first link support shaft 20. It is fitted so as to be rotatable and not to move in the axial direction of the first link support shaft 20.

Reference numerals 22a and 22b are first links, and one ends of the first links 22a and 22b are fixed to the rotating cylinders 21a and 21b, respectively.

Reference numerals 23 a and 23 b are second links, and one ends of the second links 23 a and 23 b are substantially parallel to the first link support shaft 20 and more than the first link support shaft 20. The second link support shafts 24 are attached to the link support brackets 19a, 19b, and 19c so as to be located below, respectively, and are pivotally supported.

Reference numerals 25 a and 25 b are pedal support links, and the lower ends of the pedal support links 25 a and 25 b are located below the cab floor 16 and the upper and other ends thereof are located above the cab floor 16. , Are respectively inserted into the link insertion holes 17a and 17b.

At the lower end of the pedal support link 25 a, the other end of the first link 22 a and the other end of the second link 23 a are connected to the pin 26 a, which is parallel to the first link support shaft 20. Both links 22a and 23a are pivoted by 27a so that they are parallel to each other.

Further, at the lower end of the pedal support link 25b, the other end of the first link 22b and the other end of the second link 23b are parallel to the first link support shaft 20. Both links 22b and 23b are pivotally attached by 26b and 27b so as to be parallel to each other.

28a and 28b are pedal bodies, and the pedal bodies 28a and 28b are fixed to the upper ends of the pedal support links 25a and 25b, respectively.

Reference numerals 29a and 29b are restoring devices, and the restoring devices 29a and 29b are elastic repellent bodies 30a and 30b such as coil springs having an elastic repulsive force against the force to bend from the outside. It has cylindrical connecting members 31a and 31b fixed to one ends of the elastic bodies 30a and 30b.

The connecting members 31a and 31b of the restoring devices 29a and 29b are connected to the link supporting brackets 19a and 19c by the pins 32a and 32b, respectively, and the non-connecting member ends of the repelling bodies 30a and 30b are rotatable cylinders. It is fixed to 21a and 21b respectively.

When the first links 22a and 22b are rotated clockwise about the first link support shaft 20 in FIG. 1, the above-mentioned elastic repellent bodies 30a and 30b pass through the rotation cylinders 21a and 21b. The first links 22a and 22b are urged counterclockwise.

Reference numerals 33a and 33b are reach rod connecting brackets, and the reach rod connecting brackets 33a and 33b are fixed to the rotating cylinders 21a and 21b, respectively, and are attached to the respective reach rod connecting brackets 33a and 33b. Is connected to the end of a reach rod of a machine to be operated remotely, which is not shown.

In the operation pedal device having the above-described configuration, when the driver steps on the pedal body 28a, the pedal body 28a and the pedal support link 25a move downward.

At this time, the pedal support link 25a, the pin 26a, the first link 22a, the first link support shaft 20, the link support bracket 19a, the second link support shaft 24, the second link 23a, the pin 27a. Since the parallelogram linkage mechanism is formed by, the pedal body 28a moves downward without changing the angle of the upper surface.

When the pedal support link 25a is displaced downward, the rotary cylinder 21a fixed to the first link 22a rotates clockwise around the first link support shaft 20 in FIG. The reach rod of the machine to be remotely operated connected to the rod connecting bracket 33a moves to the front A side.

When the driver steps on the pedal body 28b, the pedal support link 25b moves downward and is fixed to the first link 22a, similarly to when the pedal body 28a is operated. The rotating cylinder 21a that is rotating rotates, and the reach rod of the machine to be remotely operated, which is connected to the reach rod connecting bracket 33b, moves to the front A side.

At this time, the pedal support link 25b, the pin 26b, the first link 22b, the first link support shaft 20, the link support bracket 19c, the second link support shaft 24, the second link 23b, the pin 27ba. Since a parallelogram linkage mechanism is formed by, the pedal body 28b moves downward without changing the angle of the upper surface.

On the other hand, when the driver releases his / her foot from the pedal body 28a, the revolving force of the repellent body 30a causes the rotary cylinder 21a to rotate counterclockwise in FIG. 2 around the first link support shaft 20. The reach rod of the machine that is rotated and is connected to the reach rod connecting bracket 33a to be remotely operated returns to the rear side b, and the pedal support link 25a and the pedal body 28a arm 6 are moved by the first link 22a. Move up.

Further, when the driver releases his / her foot from the pedal body 28b, the revolving force of the repellent body 30b causes the revolving cylinder 21b to revolve, thereby performing a remote operation connected to the reach rod connecting bracket 33b. The reach rod of the power machine is returned to the rear side b, and the pedal support link 25b and the pedal body 28b are moved upward by the first link 22b.

It should be noted that the operation pedal device of the present invention is not limited to the above-mentioned embodiment, and the link support bracket, the first and second links, etc. are arranged on the floor surface of the cab. That is, instead of fixing the reach rod connecting bracket to the first link via the rotary cylinder, the reach rod connecting bracket is fixed to the second link. It goes without saying that the restoring device may be omitted when the reach rod of the machine to be remotely operated has a self-returning function, and various changes may be made without departing from the scope of the present invention.

[0043]

[Effect of device]

 As described above, according to the operation pedal device of the present invention, various excellent effects as described below can be obtained.

(1) Since the parallelogram linkage mechanism is formed by the pedal support link, the first link, the second link, and the link support bracket, the pedal depression amount of the pedal body provided on the pedal support link is slightly different. Regardless of this, the pedal top angle of the pedal body does not change.

(2) Since the pedal upper surface angle of the pedal body does not change, the pedal body can be operated easily, and the operation pedal device can be efficiently operated.

[Brief description of drawings]

FIG. 1 is a side view showing a non-depressed state of a pedal body in an embodiment of an operation pedal device of the present invention.

FIG. 2 is a side view showing the depressed state of the pedal body in the embodiment of the operation pedal device of the present invention.

FIG. 3 is a view taken along the line III-III in FIG.

FIG. 4 is a side view showing a non-depressed state of a pedal body in an example of a conventional operation pedal device.

FIG. 5 is a side view showing a depressed state of a pedal body in an example of a conventional operation pedal device.

[Explanation of symbols]

 16 Driver's floor part (fixed structure part) 19a-19c Link support bracket 20 1st link support shaft (1st support shaft) 22a, 22b 1st link 23a, 23b 2nd link 24 2nd link support Shaft (second support shaft) 25a, 25b Pedal support link 26a, 26b Pin (third support shaft) 27a, 27b Pin (fourth support shaft) 28a, 28b Pedal body 33a, 33b Reach rod connecting bracket

Claims (1)

[Scope of utility model registration request] 1. A link supporting bracket fixed to a fixed structure, a first link having one end pivotally supported by a first supporting shaft substantially horizontal to the link supporting bracket, and one end supporting the link. A second link pivotally supported on the bracket by a second support shaft that is substantially parallel to the first support shaft, and a second link that extends vertically and is substantially parallel to the other ends of the first and second links. So that the pedal support links pivotally supported by third and fourth support shafts substantially parallel to the first support shaft, a pedal main body provided above the pedal support link, and the first support shaft. And a reach rod connecting bracket which is fixed to at least one of the second links and can be connected to a reach rod of a machine to be remotely operated.