JP4464776B2 - Operation lever device - Google Patents

Description

  The present invention relates to an operation lever device that is provided in a construction machine such as a hydraulic excavator and has a grip portion that can rotate in the left-right direction and the front-rear direction.

  There exists a thing shown by patent document 1 as this type of prior art. FIG. 8 is a side view showing the arrangement of the operation lever device shown in Patent Document 1, and FIG. 9 is a perspective view showing the main part of the operation lever device shown in Patent Document 1.

  This prior art is disposed, for example, in a driver's cab of a hydraulic excavator. As shown in FIG. 8, a grip portion that can be gripped by an operator sitting on the driver's seat 41 at a position in front of the driver's seat 41 having an armrest portion 40. 42 is provided.

  Further, as shown in FIG. 9, this prior art detects a rotation of the grip portion 42 in the left-right direction and outputs a first operation angle detector 43 including a rotary potentiometer that outputs an electric operation signal, and the like. And a second rotation angle detector 47 including a rotary potentiometer that detects rotation and outputs an electric operation signal. The first rotation angle detector 43 includes a rotation shaft 46 in the casing 45. Similarly, the second rotation angle detector 47 also includes a rotation shaft 50 in the casing 49. The grip portion 42 and the rotation shaft 46 of the first rotation angle detector 43 are connected by a first input lever portion 44, and a casing 45 of the first rotation angle detector 43 and a second rotation angle detector 47. The rotation shaft 50 is connected by a second input lever portion 48. Although the second rotation angle detector 47 is fixed by the fixing means, the first rotation angle detector 43 can swing in the front-rear direction.

  The position of the intersection of the axis 51 of the rotation shaft 46 of the first rotation angle detector 43 and the axis 52 of the rotation shaft 50 of the second rotation angle detector 47 is the position of the joint P of the wrist of the operator. The shape dimensions of the first input lever portion 44 and the second input lever portion 48 are set so as to coincide with the positions.

  In this prior art, when the grip portion 42 gripped by the operator is rotated, for example, in the left-right direction, the rotation shaft 46 of the first rotation angle detector 43 is rotated via the first input lever portion 44. An electrical operation signal corresponding to the operation amount of the grip part 42 is output from the one rotation angle detector 43. Further, for example, when the grip portion 42 rotates in the front-rear direction, the second rotation angle detector 47 passes through the first input lever portion 44, the casing 45 of the first rotation angle detector 43, and the second input lever portion 48. The rotation shaft 50 rotates, and an electric operation signal corresponding to the operation amount of the grip portion 42 is output from the second rotation angle detector 47. In accordance with these electric operation signals, the corresponding directional control valves for controlling the driving of hydraulic actuators such as booms and arms are switched.

  In this prior art, the operator can rotate the grip portion 42 almost by moving the wrist around the wrist joint P, that is, the operator can perform the turning operation of the grip portion 42. Can realize a light turning operation without greatly moving its own arm, thereby reducing the operator's fatigue during the operation.

  By the way, as described above, the shape and size of the first input lever portion 44, the second input lever portion 48, and the like can be set according to the wrist joint P of the operator. There are both large and small persons, and the distance between the gripped grip portion 42 and the wrist joint P of the operator is often different for each operator. In consideration of such circumstances, in the above-described conventional technology, a technology that can vary the distance between the gripped grip portion 42 and the joint P of the operator's wrist has been proposed.

  10 is a side view showing the structure of the length adjusting means of the second input lever portion and the like in the conventional operating lever device shown in FIG. 9, and FIG. 11 is an enlarged view of a portion E in FIG.

  In the above-described prior art, in order to adapt to the size of the operator's hand, that is, when the grip portion 42 is gripped, the position of the joint P of the operator's wrist described above is the rotation of the first rotation angle detector 43. As shown in FIG. 10, the second input lever portion 48 is moved so as to coincide with the position of the intersection between the axis 51 of the moving shaft 46 and the axis 52 of the rotation shaft 50 of the second rotation angle detector 47. A structure has been proposed in which the length can be adjusted as a combination of the split lever portion 48 a and the split lever portion 48 b, and the tilt angle of the grip portion 42 can be adjusted by a set screw 53.

  As shown in FIG. 11, a screw portion 48a1 is formed at the end of the above-described split lever portion 48a, and a screw hole into which the screw portion 48a1 of the split lever portion 48a is screwed into the end portion of the split lever portion 48b. 48b1 is formed, and the split lever portion 48a and the split lever portion 48b are fixed by the lock nut 54 after the length adjustment.

JP 2000-132258 A

  By the way, in the above-described conventional technology, there is a concern that it is necessary to adjust the length of the second input lever portion 48 every time the operator who sits on the driver's seat 41 and grips and operates the grip portion 42 changes to another person. Therefore, there is a problem that the operator is bothered and the operability cannot be improved in this respect.

  The present invention has been made from the above-described state of the art, and the purpose of the present invention is to allow an operator sitting in a positioned driver's seat to perform a light operation that requires only a wrist movement without requiring an adjustment operation. To provide an operation lever device.

In order to achieve the above object, the present invention includes a grip portion that can be rotated in the left-right direction and the front-rear direction, and an operation signal output unit that outputs an operation signal according to the rotation of the grip portion. The operating lever device includes a rotating body capable of rotating in the left-right direction and the front-rear direction, and the grip portion is provided integrally with the rotating body at the rotation center of the rotating body, and the operation signal is hydraulically operated. The operation signal output means comprises a hydraulic operation valve that outputs the hydraulic operation signal according to the rotation of the rotating body .

  According to the present invention configured as described above, regardless of the size of the hand of the operator sitting in the positioned driver's seat, the portion of the hand gripping the grip portion provided in the rotating body is the center of rotation of the rotating body. Match. Therefore, the operator holding the grip part moves his / her wrist to rotate the grip part in the left-right direction or the front-rear direction to rotate the rotating body, and the amount of rotation of the rotating body from the operation signal output means That is, an operation signal corresponding to the operation amount can be output. As described above, according to the present invention, an operation signal can be output immediately with a light operation such as moving the wrist without any adjustment operation.

The present invention also relates to an operation lever device including a grip portion that can be rotated in the left-right direction and the front-rear direction, and an operation signal output unit that outputs an operation signal according to the rotation of the grip portion. And a rotating body capable of rotating in the front-rear direction, and the grip portion is provided integrally with the rotating body at the rotating center of the rotating body, and the rotating body is formed of a sphere, and the sphere is a hand. It has an opening for allowing insertion, and has a storage portion made of a concave spherical surface in which the rotating body is stored.

  Further, the present invention is characterized in that, in the above-mentioned invention, the construction machine is provided in the cab of a construction machine having a swivel body having an cab.

  In the present invention, the grip portion is provided at the center of rotation of the rotating body, so that the operator sitting on the positioned driver's seat can move the wrist immediately without holding any adjustment operation just by gripping the grip portion. Therefore, there is no concern that the operator will be bothered by the adjustment operation described above, and the operability can be improved as compared with the conventional case.

  The best mode for carrying out the operating lever device according to the present invention will be described below with reference to the drawings.

  FIG. 1 is a side view of a hydraulic excavator cited as an example of a construction machine provided with an embodiment of an operation lever device according to the present invention.

  As shown in FIG. 1, a hydraulic excavator provided with an operation lever device according to the present invention includes a traveling body 1, a revolving body 2 disposed on the traveling body 1, and a rotating body 2 in the vertical direction. A boom 3 that is movably coupled, an arm 4 that is pivotably coupled to the boom 3 and a bucket 5 that is pivotably coupled to the arm 4 are provided. In addition to the boom cylinder 3a for driving the boom 3, the arm cylinder 4a for driving the arm 4, and the bucket cylinder 5a for driving the bucket 5, a travel motor (not shown) that travels the traveling body 1 and a revolving body 2 are swung. Various hydraulic actuators such as a swing motor (not shown) are provided.

  The boom 3, arm 4, bucket 5, etc. described above constitute a working machine that performs excavation work of earth and sand. A driver's cab 6 is provided at the front side position of the swivel body 2, and an operating lever device according to the present invention for operating the various hydraulic actuators described above is disposed in the driver's cab 6.

  FIG. 2 is a side view showing the arrangement of the first embodiment of the operating lever device according to the present invention. FIG. 2A is a view showing a state in which the position of the driver's seat is close to that of the first embodiment. FIG. 4 is a diagram showing a state where the position of the driver's seat is slightly separated from the first embodiment.

  As shown in FIG. 2, the operating lever device 10 according to the first embodiment of the present invention is placed in front of a driver's seat 8 having an armrest portion 7 disposed in the driver's cab 6 shown in FIG. The operation panel 9 is installed. The driver's seat 8 is slidable in the front-rear direction as indicated by an arrow 24 in FIG. (A) The figure has shown the position of the driver's seat 8 when a comparatively small operator sits down, for example, and the driver's seat 8 is positioned in the position close | similar to the operation lever apparatus 10. FIG. (B) The figure shows, for example, the position of the driver's seat 8 when a relatively large operator sits. (A) The driver's seat 8 is slightly slid rearward from the state shown in FIG. It is positioned at a position slightly away from the operation lever operation 10. Thus, the driver's seat 8 can be slid to a position where the operator can most easily operate the operation lever device 10 according to the physique of the operator.

  FIG. 3 is a front view showing the first embodiment of the present invention, FIG. 4 is a side sectional view showing the first embodiment of the present invention, and FIG. 5 is a rear view showing an enlarged main part of the present invention. FIG. 4A is a diagram showing a neutral state, and FIG. 4B is a diagram showing an operation state.

  The operating lever device 10 according to the first embodiment of the present invention is arranged in the left-right direction indicated by the arrow 25 in FIG. 3 and in the front-rear direction indicated by the arrow 26 in FIG. In this direction, a rotating body 11 made of, for example, a sphere that can rotate is provided. A grip portion 14 that can be gripped by the operator is provided integrally with the rotating body 11 at the center of rotation of the rotating body 11. The rotating body 11 is formed with an opening 13 that allows the operator's hand to be inserted. As shown in FIG. 4, the operation panel 9 is formed with a storage portion 12 made of a concave spherical surface in which the rotating body 11 is rotatably stored.

  Further, as shown in FIG. 4, an operation signal corresponding to the rotation of the grip portion 14, that is, the rotation of the rotating body 11 integral with the grip portion 14, for example, a hydraulic operation signal can be output in the operation panel 9. An operation signal output means, that is, a hydraulic operation valve 15 is arranged.

  As shown in FIGS. 5 (a) and 5 (b), a protrusion 16 formed at the lower end of the rotating body 11 and a small pipe 17 having a relatively small diameter are connected by a first universal joint 18. A cam plate 20 is integrally provided at the lower end of a large pipe 19 having a large diameter in which the small pipe 17 is slidably accommodated. The cam plate 20 stands on the lower end portion of the cam plate 20 and the central portion of the hydraulic operation valve 15. The provided support column 21 is connected to the second universal joint 18.

  The hydraulic operation valve 15 includes a total of four slidable spools 23, two in the left-right direction indicated by the arrow 25 in FIG. 3 and two in the front-rear direction indicated by the arrow 26 in FIG. As shown in FIG. 5A, in the state where the hydraulic operation valve 15 is held at the neutral position as the rotating body 11 does not rotate, the upper ends of the four spools 23 are placed on the cam plate 20. Each of them comes into contact. When one of the spools 23 is pushed down, a pilot pressure, that is, a hydraulic operation signal is supplied to a pilot line provided in association with the corresponding spool 23.

  In order to make the explanation easy to understand, in FIG. 5, the hydraulic operation valve 15 is illustrated in an enlarged manner as compared with that shown in FIG. 4. Further, FIG. 5 shows only two spools 23 that slide in accordance with the rotation in the left-right direction among the four spools 23 provided in the hydraulic operation valve 15, and according to the rotation in the front-rear direction. The other two spools 23 that slide in this manner are not shown.

  Further, although not shown in the figure, the pilot pressure output as the hydraulic operation valve 15 is actuated, that is, the hydraulic operation signal is given to the pilot chambers of the respective directional control valves that control the driving of the various hydraulic actuators described above. It is supposed to be.

  In the first embodiment configured as described above, an operator sitting in the driver's seat 8 shown in FIG. 2 slides the driver's seat 8 appropriately according to his / her physique, positions the driver's seat 8, and then moves his / her hand. When the grip part 14 is gripped by inserting into the opening 13 of the rotating body 11 shown in FIGS. 3 and 4 and rotated in the left-right direction indicated by the arrow 25 in FIG. 3, for example, the rotating body 11 rotates, for example, FIG. 5 (b), the first universal joint 18 moves leftward in FIG. 5 (b), the small pipe 17 accommodated in the large pipe 19 extends, and the cam plate 20 tilts. The corresponding spool 23 of the hydraulic operation valve 15 is lowered. Along with this, a hydraulic operation signal is supplied from the hydraulic operation valve 15 to a pilot chamber of a corresponding directional control valve (not shown), and the directional control valve is switched to be controlled by the directional control valve. Is supplied with pressure oil from a main pump (not shown), and this hydraulic actuator is driven.

  Further, for example, when the grip portion 14 is gripped and rotated in the front-rear direction indicated by the arrow 26 in FIG. 4, the rotating body 11 is rotated, the cam plate 20 is tilted in the same manner as described above, and the hydraulic operation valve 15 is A spool different from the above is lowered. Accordingly, a hydraulic operation signal is supplied to a corresponding pilot chamber such as another directional control valve (not shown), and the other directional control valve is switched and controlled by the other directional control valve. Pressure oil from a main pump (not shown) is supplied to a hydraulic actuator different from that, and the hydraulic actuator is driven.

  According to the first embodiment, regardless of the size of the hand of the operator sitting on the positioned driver's seat 8, the part of the hand that grips the grip portion 14 provided in the rotating body 11 is the rotating body 11. Matches the center of rotation. Therefore, as described above, the operator who grips the grip portion 14 rotates the rotating body 11 by moving the wrist in the left-right direction, the front-rear direction, and further in the middle direction between the left-right direction and the front-rear direction. An operation signal corresponding to the rotation amount of the rotating body 11, that is, the operation amount, can be output from the type operation valve 15. As described above, according to the first embodiment, it is possible to output a hydraulic operation signal with a simple operation that only requires moving the wrist without requiring any adjustment operation. In addition, since no adjustment operation is required as described above, there is no concern that the operator is bothered by such an adjustment operation. Thereby, the outstanding operativity is securable.

  FIG. 6 is a front view showing a second embodiment of the present invention, and FIG. 7 is a side sectional view showing the second embodiment of the present invention. This second embodiment is, for example, a rotary potentiometer that outputs an electric operation signal as an operation signal output means capable of outputting an operation signal corresponding to the rotation of the rotating body 11 in the left-right direction indicated by an arrow 25 in FIG. The first rotation angle detector 30 is provided, and a second rotation angle detector 31 composed of, for example, a rotary potentiometer that outputs an operation signal corresponding to the rotation of the rotating body 11 in the front-rear direction indicated by an arrow 26 in FIG. I have.

  The electric operation signals output from the first rotation angle detector 30 and the second rotation angle detector 31 are input to, for example, a controller (not shown), processed in the controller, and a drive control signal is output from the controller. In response to the drive control signal, a directional control valve (not shown) associated with each hydraulic actuator is switched. The other configuration is the same as that of the first embodiment described above, for example.

  Similarly to the first embodiment, the second embodiment configured as described above can be adjusted without an adjustment operation by the operator sitting in the positioned driver's seat 8 holding the grip portion 14 of the rotating body 11. It is possible to realize a light operation that only requires moving the wrist immediately, and to obtain the same effect as the first embodiment.

  Even in the existing hydraulic operation lever device, the existing operation lever portion is used for the rotating body 11, the small pipe 17, the large pipe 19, the cam plate 20, etc. having the grip portion 14 shown in the first embodiment. By exchanging, the first embodiment of the present invention can be configured. Similarly, even in the case of an existing electric operation lever device, the second embodiment of the present invention is configured by replacing the operation lever portion with a rotating body 11 having the grip portion 14 shown in the second embodiment. Can be made. Thus, the present invention can also be applied to an existing operating lever device.

1 is a side view of a hydraulic excavator cited as an example of a construction machine provided with an embodiment of an operation lever device according to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a side view which shows the arrangement | positioning form of 1st Embodiment of the operating lever apparatus based on this invention, (a) A figure shows the state which brought the position of the driver's seat close to 1st Embodiment, (b) The figure is a driver's seat. It is a figure which shows the state which left | separated the position slightly from 1st Embodiment. It is a front view which shows 1st Embodiment of this invention. It is a sectional side view which shows 1st Embodiment of this invention. It is the rear view which expanded and showed the principal part of this invention, (a) A figure is a figure which shows the state at the time of neutrality, (b) A figure is a figure which shows the state at the time of operation. It is a front view which shows 2nd Embodiment of this invention. It is a sectional side view which shows 2nd Embodiment of this invention. It is a side view which shows the arrangement | positioning form of the conventional operation lever apparatus. It is a perspective view which shows the principal part of the conventional operation lever apparatus. FIG. 10 is a side view showing the structure of the second input lever portion length adjusting means and the like in the conventional operating lever device shown in FIG. 9. It is the E section enlarged view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 2 Revolving body 6 Driver's cab 7 Armrest part 8 Driver's seat 9 Operation panel 10 Operation lever apparatus 11 Rotating body 12 Storage part 13 Opening part 14 Grip part 15 Hydraulic operation valve (operation signal output means)
16 Projection 17 Small pipe 18 First universal joint 19 Large pipe 20 Cam plate 21 Strut 22 Second universal joint 23 Spool 30 First rotation angle detector (operation signal output means)
31 Second rotation angle detector (operation signal output means)

Claims (3)

In an operation lever device comprising a grip part capable of turning in the left-right direction and the front-rear direction, and an operation signal output means for outputting an operation signal according to the turning of the grip part.
A rotating body capable of rotating in the left-right direction and the front-rear direction is provided , and the grip portion is provided integrally with the rotating body at the rotation center of the rotating body ,
The operation signal consists of a hydraulic operation signal,
The operation lever device , wherein the operation signal output means comprises a hydraulic operation valve that outputs the hydraulic operation signal according to the rotation of the rotating body . In an operation lever device comprising a grip part capable of turning in the left-right direction and the front-rear direction, and an operation signal output means for outputting an operation signal according to the turning of the grip part.
A rotating body capable of rotating in the left-right direction and the front-rear direction is provided, and the grip portion is provided integrally with the rotating body at the rotation center of the rotating body,
The rotating body is composed of a sphere, and the sphere has an opening that allows insertion of a hand,
An operating lever device, comprising: a storage portion comprising a concave spherical surface in which the rotating body is stored . In the invention according to claim 1 or 2 ,
An operation lever device arranged in the cab of a construction machine having a swivel body having an cab .

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