JPH0577350U - Control equipment for construction machinery - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] When the control box of the prior art is tilted, the driver holds the knob with his / her fingers and holds the control box by hand, which is troublesome. . In addition, a hydraulic excavator that allows access to both the left and right sides of the driver's seat is inconvenient because the left and right control boxes must be unlocked separately. The present invention solves the above problems. [Configuration] In steering apparatus of the present invention is fixedly fork end to the proximal end of the unlocking lever 19 _L disposed to the front side of the control box 16 _L, fitted with a tip portion of the fork end to the horizontal axis 15 On the other hand, the cam plates are fixedly installed inside the left and right control boxes,
The lock release lever and the control box were connected via the cam plate. In addition, the left and right control boxes were connected by tie rods.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a work control device mounted near a driver's seat of a construction machine such as a hydraulic excavator or a work vehicle.

[0002]

[Prior Art]

 FIG. 9 is a side view of a partially cutaway main portion showing a conventional steering device. As shown in FIG. 9, the lower part of the control box 1L (1R of the pair of left and right control boxes 1L and 1R is not visible) is attached to the bracket 3 fixed to the floor plate 2 in the front-rear direction. .. An arm 4 that moves integrally with the control box 1L is provided on the lower side of the control box 1L. A bracket 5 was erected on the floor plate 2, and a mechanical lock mechanism 6 was connected between the arm 4 and the bracket 5. On the other hand, a knob 8 is provided above the control box 1L near the operation lever 7. The knob 8 and the mechanical lock mechanism 6 are connected via a push bar 9 and a push-pull cable 10. Then, when the knob 8 is pushed, the pushing force acts on the mechanical lock mechanism 6 via the push bar 9 and the push-pull cable 10, and the locking operation of the mechanical lock mechanism 6 is released. If the knob 8 is kept pressed there, the tilt of the control box 1L can be adjusted with a light force. When the control box 1L is tilted to the required tilt angle position of the driver, if the finger is released from the knob 8, the knob 8 will return to its original position and the mechanical lock mechanism 6 will be in the locked state, so that the control box 1L will be locked. Can be suspended. Reference numeral 11 indicates the driver's seat, reference numeral a indicates the front tilt end of the control box 1L, reference numeral b indicates the rear tilt end, and angle a indicates the tiltable angle range of the control box 1L.

[0003]

[Problems to be solved by the device]

 In the conventional control device, when the driver tilts the control box according to the work situation, or when returning the control box to the rear tilt end when getting off the vehicle, the driver holds the knob with his / her fingers to mechanically lock the mechanical lock mechanism. I had to hold the control box by hand and manually rotate it to the rear end position while unlocking the. The above operation is a one-touch operation type rather than a one-touch operation type because the driver's fingers and hands are used for turning operation. Also, with a hydraulic excavator that can be accessed from either the left or right side of the driver's seat, the driver had to individually unlock the left and right control boxes, which is very inconvenient. there were. An object of the present invention is to provide a control device that can solve the above problems.

[0004]

[Means for Solving the Problems]

 In the control device of the present invention, the fork end is fixed to the base end of the unlocking lever arranged on the front side of the control box, and the tip of the fork end is attached to the horizontal shaft. Is fixed so that it can rotate in the longitudinal direction of the horizontal axis, and bars with roller parts in the front-rear direction are fixed near the above-mentioned portion, while cam plates are fixed inside the left and right control boxes. Then, the locking release lever and the control box are coupled via the cam plate by guiding and moving the roller portion into the cam hole portion of the cam plate. In addition, the left and right control boxes are connected with tie rods in order to eliminate the shift in the operating positions of the lock release levers in the cam holes of the left and right cam plates. Also, by operating the lock release lever, the control box can be locked simultaneously at any tilt angle position within the tiltable angle range that extends from the front tilt end to the rear tilt end of the control box.

[0005]

【Example】

 FIG. 1 is a side view showing a control device of the present invention. In the figure, 12 is a floor plate, 13 is an underframe fixed to the upper surface of the floor plate 12, 14 is a bracket erected on the underframe 13, 15 is a horizontal axis, 16L is a left control box, 17L is a remote control valve, 18 L is an operating lever for operating the remote control valve 17 L, 19 L is a lock release lever for releasing the lock of the control box 16 L, 20 is a small bracket fixed to the underframe 13, and 21 is a control box 16 L. A pipe fixed to the inner side, 22 is a mechanical lock mechanism, and 0-0 ′ is a vertical center line as seen from the side of the control box 16L. FIG. 2 is seen from AA of FIG. 1 ( However, the left and right lock release levers 19L and 19R are seen from A '). In the figure, 16R is a control box on the right side, 23 is a boss fixed to the center of the horizontal shaft 15, 24 is a link plate rotatably attached to the boss 23, and 25 is a driver's seat shown by phantom lines. .. Since the left and right control boxes 16L and 16R are arranged symmetrically with each other, the reference numerals of related parts are attached to the control box 16L side. Reference numeral 26 is a fork end fixed to the base end portion of the lock release lever 19L, and 27 is attached with a bias so that the fork end 26 returns to the locked position state when the lock release lever 19L is not operated. Spring, 28 is a pin that pivotally supports the tip of the fork end 26 on the horizontal shaft 15, 29 and 30 are first and second push-pull cables, and 31 and 32 are left and right control boxes 16L and 16R. Each of them is a seat plate fixed to the inner surface portion, and 33 is a tie rod.

FIG. 3 is a partially cutaway side view showing a state in which the control box 16L is tilted to the rearward tilting end. In the figure, 34 is a bar with a roller part fixed in the front-rear direction to the fork end 35 of the fork end 26, 36 is a roller part of the bar with a roller part 34, and angle b is the position of the control box 16L in FIG. This is the angle at which the rearward tilted end also tilts. FIG. 4 is a view showing the cam plate 37 as seen from BB in FIG. In the figure, 38 is a cam hole formed in the cam plate 37, 36 is a roller portion shown in phantom, and reference numeral C is a locking position where the roller portion 36 of the locking release lever 19L is held when the control box 16L is locked. , Reference numeral D is a guide groove portion for pushing out when the locking release lever 19L is operated in the pushing direction, and the roller portion 36 is held by sliding. Reference numeral E is a roller portion when the locking release lever 19L is operated in the pulling direction. 36 is a retracting guide groove portion in which 36 slides and is held. FIG. 5 is a side view of the lock release lever 19L. In the figure, 39 is a pin hole opened at the tip of the fork end 26. FIG. 6 is a view of the base end portion side of the lock release lever 19L in FIG. 5 viewed from C. FIG. 7 is a plan view of an essential part seen from D in FIG. FIG. 8 is a front view showing a state of the left side portion at the time of unlocking operation of the control device of the present invention.

Next, the configuration of the control device of the present invention will be described with reference to FIGS. In the control device of the present invention, the bracket 14 is erected on the underframe 13 fixed on the floor plate 12 below the driver's seat 25, and the bracket 14 is provided with the horizontal shaft 15 in the left-right direction. The control boxes 16L and 16R were attached to the horizontal shaft 15 so as to be tiltable in the front-rear direction. The fork end 26 (the control boxes 16L and 16R are provided symmetrically at the base end portions of the lock release levers 19L and 19R arranged on the front sides of the control boxes 16L and 16R, respectively) (The reference numeral is a single number) is fixed, and the tip of the fork end 26 is attached to the horizontal shaft 15, and the fork end 35 of the fork end 26 is formed so as to be rotatable in the longitudinal direction of the horizontal shaft 15. Further, a bar 34 with a roller portion in the front-rear direction is fixed near the above-mentioned strut 35. On the other hand, cam plates 37 are fixedly installed inside the left and right control boxes 16L and 16R, respectively, and the roller portions 36 of the roller-equipped bars 34 are guided and moved into the cam hole portions 38 of the cam plates 37. As a result, the unlocking levers 19L and 19R and the control boxes 16L and 16R are connected via the cam plate 37, respectively. The left and right controller boxes 16L and 16R are connected by a tie rod 33 in order to eliminate the displacement of the locking release levers 19L and 19R from each other in the cam holes 38 of the left and right cam plates 37. In addition, by operating the lock release lever 19L or 19R (including simultaneous operation of 19L and 19R), the control boxes 16L and 16R are controlled within the tiltable angle range extending from the front tilt end to the rear tilt end. The boxes 16L and 16R are configured so that they can be locked at any tilt angle position simultaneously on the left and right.

Next, the operation of the control device of the present invention will be described. First, when the lock release levers 19L and 19R are not operated at all, the longitudinal direction of the fork end 26 is orthogonal to the longitudinal direction of the horizontal shaft 15 due to the spring force of the spring 27, as shown in FIG. Is in a state. In this case, since the first and second push-pull cables 29, 30 are both in a tension state and the mechanical lock mechanism 22 is in the lock operation, the control boxes 16L and 16R are locked to the left and right sides of the driver's seat ( Has been fixed).

Next, when the driver wants to perform deep digging by operating the operation levers 18L and 18R (the right operation lever 18R is not shown) while visually observing the work situation, such as immediately below the front, or when getting off the vehicle ( When attempting to evacuate, the control boxes 16L and 16R must be tilted forward or backward. In this case, one of the locking release levers 19L and 19R, whichever is more convenient to operate, is tilted inward while the locking release lever is moved forward or backward as required. Tilt to. When this operation is performed, the roller portion 36 of the roller portion-equipped bar 34 fixedly mounted on the fork end 26 slides along the cam hole portion 38 of the cam plate 37, and the guide groove portion for pulling out or pulling in. It is guided by the hour guide groove e. As shown in FIG. 8, the tip corners of the fork end 26 rotate in the left and right directions about the pin 28 while compressing the spring 27. The fork end portion 35 of the fork end 26 and the front end portion (shown in FIG. 7) of the link plate 24 are connected by a first push-pull cable 29, and the front end portion of the link plate 24 and the mechanical lock mechanism 22 are connected. The remote control mounting portion (shown in FIG. 8) is connected by a second push-pull cable 30, and the mechanical lock mechanism 22 is provided between the bracket 20 of the underframe 13 and the pipe 21 inside the control box 16L. Installed. Therefore, since the link plate 24 is rotated via the first push-pull cable 29, the second push-pull cable 30 is in a relaxed state. For the rear end portion of the link plate 24 (shown in FIG. 7), another first and second push-pull cable 29 is provided from the right control box 16R side so as to interlock with the left control box 16L. 'And 30' are connected. Therefore, both the left and right control boxes 16L and 16R mechanical lock mechanisms 22 are unlocked simultaneously, so that the control boxes 16L and 16R can be tilted as required. When the lock release lever is released when the control boxes 16L and 16R are at the required tilting angle positions, the longitudinal direction of the fork end 26 and the longitudinal direction of the horizontal shaft 15 are orthogonal to each other due to the spring force of the spring 27. Return to. Therefore, the control boxes 16L and 16R can be immediately locked.

[0010]

[Effect of the device]

 In the prior art control device, when the control box is tilted, it is difficult for the driver to operate by holding the knob with fingers and holding the control box by hand. In addition, the hydraulic excavator that allows access from both the left and right sides of the driver's seat was inconvenient because the left and right control boxes had to be unlocked separately. However, in the control device of the present invention, the fork end is fixed to the base end of the lock release lever arranged on the front side of the control box, the tip of the fork end is attached to the horizontal shaft, and the fork end is attached to the fork end. Are mounted so that they can rotate in the longitudinal direction of the horizontal shaft, and bars with roller parts in the front-rear direction are fixed near the above-mentioned part, while cam plates are fixed inside the left and right control boxes. The locking release lever is connected to the control box via the cam plate by moving the roller part into the cam hole of the cam plate. Therefore, when tilting the control box, tilt the lock release lever inward and operate it in the required front-back direction, and the roller provided on the base end side of the lock release lever will move into the cam hole of the cam plate. The control box will be unlocked after being guided along. That is, since the control box can be tilted via the cam plate, the lock release lever can be operated smoothly, and the lock of the control box can be released with one touch without holding the control box by hand. Further, in the control device of the present invention, the left and right control boxes are connected by tie rods separately from the horizontal shaft on which the left and right control boxes are mounted. As a result, due to the mounting relationship of the component parts in the left and right control boxes, even if there is a difference in assembly due to slight manufacturing errors during manufacturing, operate the left or right lock release lever, whichever is more convenient. At this time, both of the above-mentioned lock release levers can be fitted into the guide groove portions in the cam hole portion of the cam plate without shifting the operation position. Further, in the control device of the present invention, the control box can be locked at any tilting angle position simultaneously on the left and right by one-touch operation of the lock release lever, so that the driver can operate the control lever while observing the work situation, for example, immediately below the front. It is very convenient when you want to dig deeper by manipulating it or when you want to get off the car, because you can easily tilt the control box immediately to the required position.

[Brief description of drawings]

FIG. 1 is a side view showing a control device of the present invention.

FIG. 2 is a view seen from AA in FIG.

FIG. 3 is a partially cutaway side view showing a state where the control box of the present invention is tilted to a rearward tilting end.

FIG. 4 is a diagram showing a cam plate viewed from BB of FIG.

FIG. 5 is a side view of a lock release lever of the present invention.

6 is a view of a base end portion side of the lock release lever in FIG. 5 viewed from C. FIG.

FIG. 7 is a plan view of an essential part seen from D in FIG.

FIG. 8 is a front view showing a state of the left side portion at the time of unlocking operation of the control device of the present invention.

FIG. 9 is a partial cutaway side view showing a conventional steering device.

[Explanation of symbols]

1L, 1R, 16L, 16R Control box 6,22 Mechanical lock mechanism 7,18L, 18R Operation lever 10, 29, 29 ', 30, 30' Push-pull cable 13 Underframe 15 Horizontal shaft 19L, 19R Lock release lever 24 Link plate 26 Fork end 27 Spring 33 Tie rod 34 Roller section bar 35 Alternate section 36 Roller section 37 Cam plate 38 Cam hole section

Claims (3)

[Scope of utility model registration request] 1. A control box with operating levers for operating various hydraulic actuators is provided near the driver's seat, and a horizontal frame is provided in the underframe on the lower side of the driver's seat, and a horizontal axis is provided in the front-rear direction about the horizontal axis. A control device with a control box mounted so that it can rotate, and a locking mechanism provided between the floorboard side and the control box, at the base end of the locking release lever arranged on the front side of the control box. The fork end is fixed, the tip of the fork end is attached to a horizontal shaft, and the fork end is formed so that it can rotate in the longitudinal direction of the horizontal shaft. The bar with a part is fixed, while the cam plates are fixed inside the left and right control boxes, respectively, and the above-mentioned rollers are installed in the cam holes of the cam plate. A control device for a construction machine, wherein a locking release lever and a control box are coupled to each other via a cam plate by moving a roller portion by a guide. 2. The control device for a construction machine according to claim 1, wherein the right and left of the left and right cam plates of the cam hole of the left and right cam plates are displaced from each other in order to eliminate the displacement of the operation positions of the lock release levers. Control equipment for construction machinery, characterized in that the control box of is connected by tie rods. 3. The control device for a construction machine according to claim 1 or 2, wherein the control box can be tilted over a front tilt end and a rear tilt end by operating a lock release lever. A control device for a construction machine, characterized in that the control box can be locked simultaneously at any tilting angle position within the angle range.