KR100255978B1 - Multi-manipulator for hydraulic system of crane - Google Patents

Abstract

PURPOSE: A multi-control device for a crane hydraulic system is provided to make easy a crane operation and an engine rpm(revolutions per minute) from both sides of crane base, to control an rpm and to operate the crane even stepping around a cap of vehicle for ensuring view. CONSTITUTION: A multi-control device comprises a main accelerator control lever(51) at a bottom of a main manipulation lever(31) of a main control valve(2); a primary subsidiary accelerator control lever(52) installed at a vertical support shaft of a fixed frame(42); plural primary links(35) connecting the main accelerator control lever and the primary subsidiary accelerator control lever as well as the main manipulation lever and the primary subsidiary manipulation lever interlockingly; two driven gears engaged to be rotatable interlocked with left and right movements of first links, axially connected to two driven gears arranged in the frame and a first accelerator connecting wire(63) joining an accelerator lever of driven shaft of one side and an accelerator lever of engine side. With simple manipulation of main manipulation levers(31) or a primary subsidiary manipulation lever(41), the main accelerator control lever(51) or the primary subsidiary accelerator control lever(52), an rpm is freely controlled. And overload on crane is simply relieved.

Description

Multi-manipulator for hydraulic system of crane

According to the present invention, the operation and the crane operation for compensating the flow rate during overload in a vehicle crane which draws out the driving force of the vehicle engine and uses it as a hydraulic power source can be performed at either the left or right side of the crane base, When the field of view is difficult to operate when the driving is difficult, the present invention relates to a multi-manipulator for a hydraulic system of a crane for a vehicle that can be operated while securing a field of view even near a cap of a vehicle.

The vehicle crane draws the driving force of the engine through the PTO shaft and uses it to drive the hydraulic pump, so that it is used as a hydraulic power source for manipulating various moving parts. Such a crane for a vehicle is mounted on a vehicle and has an outrigger at both ends, and a crane base having a turntable at a center of an upper surface thereof, a column rotatably installed vertically on an upper portion of the turntable, and inclined upwardly from the column to the upper and lower sides. It includes a boom undulating and a winch installed along the boom to lift and unload heavy loads.

The crane base is provided with various hydraulic mechanisms such as a hydraulic motor, an oil tank, a hydraulic valve, and the hydraulic transmission is performed by the driving force of the engine drawn out through the PTO shaft. That is, the driving force of the engine is transmitted to the hydraulic pump through the PTO shaft, the hydraulic oil contained in the oil tank is pumped to the main control valve. The hydraulic oil introduced into the main control valve is pumped to the cylinders or the hydraulic motor of each operation unit according to the selective operation of the operation levers for switching the flow path of each valve, so that the operation of the crane can be performed as each operation unit is selectively operated. The oil pushed to each operation part is returned to the oil tank via the main control valve.

On the other hand, the main control valve is a swing valve for turning the boom left and right by turning the column of the upper turntable from side to side in order from bottom to top, an extension valve for stretching the boom, and a derrick valve for turning the boom up and down, and And four valves including a winch operating valve for driving the winch.

The flow path of each valve of the main control valve is made by the movement of the spool, and the movement of the spool is independently made by the selective operation of the casting levers that are connected to each spool and one end in order to protrude out of the main control valve. Is done. And even if there is an operator on the opposite side of the main control valve, the crane base is installed on the fixed frame of the rectangular frame on one side of the crane base so that the flow path can be changed to the valve base. Is installed. Since the casting levers and the auxiliary operating levers are connected to each other by the links, the spool is moved by the linkage of the first links even when the casting levers or the auxiliary operating levers are operated on the left and right sides of the crane base, thereby opening the flow path of the valves. You can switch organically.

The hydraulic pressure for operating the crane is set by adjusting the flow rate by adjusting the number of revolutions of the vehicle engine in consideration of the average workload to be able to perform a suitable working speed and work capacity. In the crane work process, the moving part is driven while receiving various loads from no load to overload, and the flow rate of the operating hydraulic pressure of the moving part must be changed immediately according to such various loads, but conventionally, the engine rotation speed is controlled by the accelerator control lever installed separately. Since the casting levers or the auxiliary control levers had to be manipulated while adjusting, the operation of the crane becomes quite inconvenient.

Therefore, in many cases, the crane is operated under no load, but the engine speed is maintained at a high speed so as to obtain a hydraulic pressure larger than the hydraulic pressure corresponding to the average work load. In the case of maintaining the engine speed at a low speed, if an overload occurs during the operation of the crane, it is difficult to perform the crane work because the required hydraulic pressure cannot be immediately satisfied.

In addition, if the field of view is not secured, the operation levers are operated by alternating between the left and right sides of the crane base, but the operation of the crane can not be resolved and the opposite side can not be confirmed. This can lead to serious safety accidents. In order to solve this problem, the operator and the operator who check the working position may operate the crane together.However, when the two persons operate the crane, not only is it a labor cost increase factor, but also it is not easily communicated with each other. If you do cause a major accident.

The present invention has been made in view of the above-described conventional problems, and improves responsiveness by allowing the operation and crane operation for compensating the flow rate at the time of overload to be performed immediately at either the left and right sides of the crane base, and also the crane The object of the present invention is to provide a multi-manipulator for a hydraulic system of a crane for a vehicle that can be operated while securing a field of view even near a cap of a vehicle when the field of vision is difficult to operate on the left and right sides.

1 is a schematic plan view showing a crane base of a crane equipped with a multi-manipulator according to the present invention.

Figure 2 is a plan view of the main part showing the operating state of the casting operation lever portion and the first main accelerator control lever constituting the multi-control apparatus according to the present invention.

3 is a view seen from the direction III of FIG.

Figure 4 is a plan view of the main part showing the operating state of the first auxiliary operation lever unit and the first auxiliary accelerator control lever constituting the multi-control apparatus according to the present invention.

FIG. 5 is a view seen from the direction V of FIG. 1.

6 is a front sectional view of the main portion viewed from the direction VI of FIG. 2.

7 is a perspective view of main parts of a first auxiliary operating lever constituting a multiple steering apparatus according to the present invention;

8 is a perspective view of another main portion of the first auxiliary operating lever portion constituting the multiple steering apparatus according to the present invention.

9 is a cross-sectional view of the main portion of the first auxiliary control lever constituting the multiple control apparatus according to the present invention.

10 is a plan view showing a crane base provided with a second auxiliary operation lever portion constituting a multi-control apparatus according to the present invention.

11 is a perspective view illustrating a main part cutaway showing a coupling relationship between a second auxiliary operating lever part and first links constituting a multiple steering apparatus according to the present invention;

12 is a plan view showing a crane base provided with another second auxiliary operation lever portion constituting a multi-control apparatus according to the present invention.

<Explanation of symbols for the main parts of the drawings>

1: Crane base 2: Main control valve

3: casting lever 4: the first auxiliary operation lever

7: second auxiliary operation lever 21: valve

24: Spool 31: Casting Lever

32, 45: vertical support shaft 33, 46: rotating bracket

35: 1st link 41: 1st auxiliary operation lever

42: fixed frame 44: lower plate

51: main accelerator control lever 52: the first auxiliary accelerator control lever

53: spacer 54: nut

55: driven shaft 56: support bracket

57: dog 58: drive bracket

59: driven gear 60: driven lever

61: spring 63: first accelerator connection wire

71: support frame 72: horizontal support shaft

73: second auxiliary operation lever 75: second link

76: accelerator pedal 77: second accelerator connection wire

79: 2nd auxiliary accelerator control lever

In order to achieve the above object, the multiple control device according to the present invention includes: a main accelerator control lever installed to be rotatable back and forth adjacent to lower portions of the casting operation levers of the main control valve installed on the left side of the crane base; The first auxiliary accelerator control is installed on the right side of the crane base so as to be able to swing back and forth on the vertical support shaft of the fixed frame having a rectangular frame shape to support the first auxiliary operating levers in correspondence with the main accelerator control levers. A lever; A plurality of first links connecting the casting operation levers and the first auxiliary operation levers to be interoperable, and linking the main accelerator control levers and the first auxiliary accelerator control levers to each other; Two driven gears which are respectively fixed to two driven shafts which are rotatably installed in parallel with the vertical support shafts at predetermined intervals in the fixed frame and are engaged with each other by interlocking with the left and right movements of the first links; And, by connecting the one side driven shaft and the accelerator lever of the engine side to each other, the first accelerator connecting wire to be pulled and returned in accordance with the engagement rotation amount of the driven gear to adjust the rotational speed of the engine by turning the engine side accelerator lever It is characterized by comprising.

According to the present invention, two driving brackets are sequentially installed at the portions corresponding to the first auxiliary operating levers and the first auxiliary accelerator adjusting lever side of each first link at intervals wider than the interval between the driven shafts, and protrude forward. Correspondingly, both dogs which contact the driving brackets and move in the direction of movement of the first link when the first links are moved left and right are sequentially fixed to the driven shafts by both support brackets. In addition, a driven lever having one end of the first accelerator connecting wire connected to the right driven shaft on the right driven shaft is protruded obliquely toward the front left side of the fixed frame, so that the first accelerator connecting wire is turned by turning the driven lever according to the rotation of the driven shaft. Can be towed and returned.

The first auxiliary accelerator control lever is pivotally coupled to the lower end of the vertical support shaft installed in the fixed frame via spacers, and the operating force of the first auxiliary accelerator control lever is adjusted according to the amount of rotation of the lower nut fixing the vertical support shaft. (1) The auxiliary accelerator control lever can be pivoted to fix its pivoting position at that position.

Further, according to the present invention, a support frame having a horizontal support shaft installed in the transverse direction at the center of the first link of the crane base, that is, the cap side of the vehicle, is installed, the four second auxiliary operation lever on the horizontal support shaft The secondary auxiliary control levers protrude upward between the crane and the cab of the vehicle by supporting the stop of the field so as to be able to pivot back and forth. The lower ends of the second auxiliary operating levers are sequentially connected to the first links through four second links such that the four first links connecting the casting operation levers and the first auxiliary operation levers are moved left and right during the front and rear operation. In addition, an accelerator pedal connected to the engine side accelerator lever through the second accelerator connection wire may be further installed at one upper side of the support frame.

In addition, according to the present invention, instead of the accelerator pedal, a second auxiliary accelerator control lever may be further installed on the horizontal support shaft of the support frame so as to be rotatable back and forth, in this case, the lower end of the second auxiliary accelerator control lever. The first link connecting the main accelerator control lever and the first subsidiary accelerator control lever at the time of forward and backward rotation is connected via a second link that is further employed to move left and right.

According to the multiple steering apparatus of the present invention configured as described above, the engine speed is appropriately adjusted by operating the main accelerator control lever or the first auxiliary accelerator control lever to correspond to the average workload. When the main accelerator control lever or the first auxiliary accelerator control lever is operated, the dog rotates according to the movement of the first link connecting them, and accordingly, the driven shaft rotates so that the first accelerator connection wire is tensioned to control the engine speed. have.

Next, the crane operation is performed by operating the casting operation levers or the first auxiliary operation levers to switch the flow path of the main control valve. If the flow rate of working hydraulic pressure is overloaded during operation of the crane, if the turning angle of the casting levers or the first auxiliary operating lever is increased, the dogs will pivot as the first links connecting them move. Accordingly, the first accelerator connection wire is tensioned and the engine-side accelerator lever is turned to increase the rotation speed of the engine, thereby eliminating the overload as the flow rate increases.

On the other hand, when the working position is covered by a column or the like, when the field of view cannot be secured on the left and right sides of the crane base, the second auxiliary operating levers, the accelerator pedal, or the second auxiliary accelerator control which protrudes to the upper side of the supporting frame while securing the field of view is secured. When the lever is operated, the first links are moved left and right through the second links, thereby adjusting the engine speed.

Other features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

Description of the direction in this invention is made by setting the cab 19 direction of a vehicle forward as shown in FIG.

Reference numeral 1 is a crane base mounted on a vehicle, and outriggers are installed on the left and right in order to stably support the crane work load, and a turntable 11 is installed at the upper part of the center, and the turntable 11 supports the boom. It has a turntable bearing 12 on its top surface to pivotally support the column.

In addition, an oil tank 13 is installed at the rear side of the crane base 1, and the oil tank 13 is connected to the hydraulic pump 14 driven by the PTO shaft for drawing the engine output. Therefore, the discharge flow rate of the hydraulic pump 14 is determined by the rotation speed of the engine.

The hydraulic pump 14 is connected through the main control valve 2 and the supply pipe 15 installed on the upper left of the crane base 1, and the hydraulic oil discharged from the hydraulic pump 14 is pumped to the main control valve 2. .

As shown in Figs. 2 and 3, the main control valve 2 has four valves 21, 21, 21, 21 installed in order from the bottom to the top, and the bottom valve 21 is boom by rotating the column. Is a swing valve for turning left and right, the upper valve 21 is an extension valve for stretching the boom, the upper valve 21 is a derrick valve for undulating the boom up and down, and The valve 21 is a winch operating valve for driving the winch. The lower part of the main control valve 2 is provided with a supply port part 22 connected through the hydraulic pump 14 and the supply pipe 15, and the oil tank 13 and the drain pipe at the top of the main control valve 2. A drain port portion 23 connected through 16 is provided.

Port switching by the movement of the spool 24 of each valve 21 of the main control valve 2 is made independently by the individual operation of the casting lever 31 constituting the casting lever portion (3). That is, a vertical support shaft 32 is installed on the left side of the main control valve 2, and as shown in FIG. 6, the vertical support shaft 32 is installed at the end of the casting levers 31, so that each valve 21 is provided. Rotating brackets 33 connected to the spools 24 are rotatably coupled in turn so that the casting work levers 31 are installed vertically in a state in which they are extended to the left side as shown in FIGS. 1 and 2. do.

As shown in FIG. 6, the casting work levers 31 are rotatable back and forth by being inserted through the forward and backward slots 36 formed in the rotary bracket 33, and adjacent to the rotary bracket 33. The spring 38 interposed between the outer ring 34 and the inner ring 37, which is fluidly inserted around the casting work levers 31, is compressed and restored in accordance with the turning of the casting work lever 31. If no external force is applied to the operation lever 31, the casting operation lever 31 is maintained in a neutral state.

That is, when the casting work lever 31 is rotated, the spool 24 is moved to convert the flow path, and when the casting work lever 31 is further rotated in this state, the spool 24 is maintained in the spring while being moved. As the 38 is compressed, only the casting work lever 31 is further pivoted along the slot 36. When the casting work lever 31 is released in this state, the casting work lever 31 is maintained in a neutral state by the restoring force of the compressed spring 38, and the spool 24 is neutral by the spring installed in the valve 21. Return to.

In the neutral state of the spool 24, the hydraulic oil pumped from the hydraulic pump 14 through the supply pipe 15 and the supply port part 22 passes through each valve 21 and passes through the drain port part 23 to the oil tank ( 13). When the free end of the casting work lever 31 is pulled and operated in the neutral state, the hydraulic oil is pumped to the cylinders or hydraulic motors of the respective moving parts through the valves 21 as the flow paths of the valves 21 are changed. The pressurized hydraulic oil is drained to the oil tank 13 through the drain port part 23 and the drain pipe 16 in turn via each valve 21.

On the other hand, due to the relationship that the main control valve (2) is located on the left side of the crane base (1), when the crane driver operates the casting levers 31 on the right side of the crane base (1) to operate the crane by covering the column, etc. Difficult cases arise. Accordingly, the casting levers 31 are disposed on the upper right side of the crane base 1 in correspondence with the casting lever part 3 so that the flow path switching of the main control valve 2 can be performed even on the right side of the crane base 1. And a first subsidiary operation lever part 4 having first subsidiary operation levers 41 corresponding thereto. The first auxiliary operating levers 41 are sequentially connected to the casting operation levers 31 by the first links 35.

As shown in FIGS. 4 and 5, the first auxiliary operating lever part 4 is a fixed frame having a substantially rectangular frame shape vertically installed behind the first links 35 of the upper right end of the crane base 1. (42), the vertical support shaft 45 for connecting the upper ends of the upper plate 43 and the lower plate 44 of the fixed frame 42 with each other, and rotates independently of the vertical support shaft 45, respectively It is possible to include the first auxiliary operating lever 41 is connected to one end.

The first auxiliary operating levers 41 are pivotally connected to the vertical support shaft 45 through the rotation bracket 46 formed in the same manner as the rotation bracket 33. As shown in FIG. 4, the connecting members 47 are installed at the ends of the first auxiliary operating levers 41 to protrude forward and correspondingly, as shown in FIGS. 2 and 6. At the end, the connecting members 37 are respectively installed and protrude forward, and the free ends of these connecting members 37 and 47 are connected in turn by the first links 35 so that the casting levers 31 and the first ones are connected. The auxiliary operation levers 41 become interlockable.

Accordingly, when the first auxiliary operation levers 41 are pulled and manipulated, the spools 24 move as the casting operation levers 31 rotate by the interlocking action of the first links 35 and the connection members 37 and 47. When the first auxiliary operation levers 41 are released, the casting operation levers 31 are returned to their original positions by the springs 38 and the spools 24 are neutral by the springs built in the valves 21. It returns to the state.

On the other hand, according to the present invention, as shown in Figure 2 and 3, reference numeral 51 is a main accelerator control lever, as the front and rear pivot connection structure of the casting work lever 31 of the casting work lever portion 31 One end is supported to be able to swing back and forth adjacent to the lower part. That is, another channel-type rotary bracket 33 is further pivotally coupled to the lower end of the vertical support shaft 32, and one end of the main accelerator control lever 51 is connected to the additional rotary bracket 33. The main accelerator control lever 51 may be turned back and forth.

4 and 5, reference numeral 52 is a first auxiliary accelerator control lever, and a rotation bracket coupled to the lower end of the vertical support shaft 45 in correspondence with the main accelerator control lever 51. One end is connected to 46 so that it can be turned back and forth.

According to the present invention, as shown in FIGS. 2 to 5, the first auxiliary accelerator control is similar to the method of connecting the casting work levers 31 shown in FIG. 6 and the method of connecting the first auxiliary work levers 41. Another connecting member 47 protrudes further forward at the end of the lever 52, and another connecting member 37 protrudes further forward at the end of the main accelerator control lever 51. The free ends of the connecting members 37 and 47 are rotatably connected to each other by an additional first link 35, so that the main accelerator control lever 51 and the first auxiliary accelerator control lever 52 are connected to each other. It can be interlocked.

Accordingly, when the main accelerator control lever 51 is turned back and forth, the first auxiliary accelerator is adjusted by interlocking with the first link 35 and the connecting members 37 and 47 connecting the first accelerator accelerator lever 52 and the first auxiliary accelerator control lever 52. Even if the lever 52 pivots back and forth and the first auxiliary accelerator control lever 52 is turned back and forth, the main accelerator control lever 51 is interlocked and turned back and forth.

Further, according to the present invention, the turning force of the rotation bracket 46 connected to the first auxiliary accelerator control lever 52 is shown in Figure 9, of the spacers 53 which are installed at the lower end of the vertical support shaft 45 It can be adjusted by intervening. That is, the diameter is reduced so that the journal portion is formed at the lower end of the vertical support shaft 45, and the rotary bracket 46 is rotatably sandwiched through the two spacers 53 and 53 at the journal portion, and the lower plate 44 is provided. The first auxiliary accelerator control lever by fastening the nut 54 to the vertical support shaft 45 protruding downward, and pushing the lower plate 44 upward in accordance with the amount of rotation of the nut 54 to clamp the rotating bracket 46. The turning force of 52 can be adjusted. Therefore, as the nut 54 is tightened, the turning state of the first auxiliary accelerator control lever 52 can be well fixed by turning and then releasing the first auxiliary accelerator control lever 52.

Meanwhile, according to the present invention, between the upper plate 43 and the lower plate 44 of the fixed frame 42, two driven shafts 55 and 55 at predetermined intervals in parallel with the vertical support shaft 45. This is in turn rotatably installed.

As shown in FIGS. 4 and 7, both ends of the driven shafts 55 are provided with support brackets 56 protruding forward, and both ends of the dogs 57 are sequentially connected to the ends of the support brackets 56, respectively. As a result, the dogs 57 are installed in parallel with them in front of the driven shafts 55. In addition, the two driving brackets 58 and 58 at predetermined intervals, with the dogs 57 and 57 interposed between the fixing frames 42 of the first links 35 in correspondence with the dogs 57, respectively. ) Are sequentially projected to the rear. Therefore, when the casting levers 31, the first auxiliary operation levers 41, the main accelerator control lever 51, or the first auxiliary accelerator control lever 52 are selectively turned, the first link 35 is left and right. And the left and right drive brackets 58 of the first link 35 push the left and right dogs 57 to the left and right, so that the left driven shaft 55 rotates clockwise and the right driven shaft 55 is counterclockwise. Direction of rotation.

Further, according to the present invention, the driven gears 59 are fitted to the interruption portions of the driven shafts 55 in a state where they are engaged with each other. These driven gears 59 are preferably formed in a substantially fan shape. Accordingly, when the left driven shaft 55 rotates clockwise as the first link 35 moves to the right, the right driven shaft 55 rotates counterclockwise by the engagement of the driven gear 59. Conversely, when the right follower shaft 55 rotates counterclockwise as the first link 35 moves to the left side, the left follower shaft 55 rotates clockwise. That is, even when the first link 35 moves in any of the left and right directions, the left driven shaft 55 rotates clockwise and the right driven shaft 55 rotates counterclockwise due to the engagement of the driven gears 59. do.

In addition, according to the present invention, as shown in Figures 4 and 7, the driven lever 60 is condensed to the lower end of the right driven shaft 55 is protruded inclined toward the rear left of the fixed frame 42. The driven lever 60 may be integrally formed with the lower support bracket 56, as shown in FIG. In this case, it is preferable that the valley curved portion between the driven lever 60 and the lower support bracket 56 is fixed to the right driven shaft 55.

4 and 5, one end of the spring 61 is connected to the front protrusion of the driven lever 60, and the other end of the spring 61 is connected to the lower plate 44 of the fixing frame 42. do. The other end of the spring 61 is preferably connected to the guide protrusion 62 protruding upward on the upper surface of the lower plate 44. Therefore, when the right driven shaft 55 rotates counterclockwise, the spring 61 is tensioned as the driven lever 60 also turns counterclockwise. When the external force acting on the driven shafts 55 and 55 in the tensioned state of the spring 61 is removed, the driven shaft 60 pivots clockwise by the restoring force of the spring 61 so that the driven shafts 55 return to their original positions. As a result, the first link 35 is pushed back by the turning amount of the dogs 57. The main accelerator control lever 51 and the first auxiliary accelerator control lever 52 are pivotally adjusted by the distance between the dogs 57 and the driving bracket 58 in a neutral state according to the amount of rotation of the nut 54. It can keep the state.

Further, according to the present invention, one end of the first accelerator connecting wire 63 is connected to the free end of the driven lever 60, and the other end of the first accelerator connecting wire 63 is connected to the accelerator lever on the engine side. One end of the first accelerator connecting wire 63 is preferably connected to the free end of the driven lever 60 via the guide protrusion 62.

Therefore, when the driven lever 60 rotates in the counterclockwise direction, the first accelerator connecting wire 63 is pulled and the accelerator lever on the engine side turns to increase the amount of fuel supplied to the engine, thereby increasing the engine speed. Therefore, the overload of the operation part can be eliminated by increasing the discharge pressure and the flow rate of the hydraulic pump 14. Then, when the driven lever 60 returns to its original position by the restoring force of the spring 61, as the towed first accelerator connecting wire 63 returns to its original position, the accelerator lever on the engine side also returns to the original position, thereby rotating the engine. The number maintains the rotation speed set by the main accelerator control lever 51 or the first auxiliary accelerator control lever 52.

In addition, according to the present invention, when the crane is difficult to work because the field of vision is not secured even on the left and right of the crane base 1, the crane work and the engine speed can be easily operated even in the vicinity of the cap 19 of the vehicle. have.

To this end, according to the present invention, as shown in Figures 10 and 11, the support having a horizontal support shaft 72 installed in the transverse direction at the center in the front position of the first link (35) of the crane base (1) The frame 71 is installed, and the interruption portions of the four second auxiliary operation levers 73 constituting the second auxiliary operation lever 7 are supported on the horizontal support shaft 72 so as to be able to rotate back and forth. The support frame 71 is preferably installed at a height approximately similar to the height of the cap 19 of the vehicle, the support frame (71) so that the second auxiliary operation lever (73) can be easily operated on the support frame (71) The upper end of the 71 is preferably made to be able to act as a step by bending toward the cap 19, that is to the front.

The lower ends of the second auxiliary operation levers 73 are four first links 35 connecting the casting operation lever 31 and the first auxiliary operation levers 41 to the front and rear operation of the second auxiliary operation levers 73. ) Are sequentially connected to the first link 35 through the second link 75 so as to move left and right. The second links 75 are formed in an approximately L shape so that the lower ends of the second auxiliary operating levers 73 move left and right, so that the first links 35 are moved left and right, so that the engine as described above. The rotation speed of can be adjusted.

In addition, according to the present invention, the upper one side of the support frame 71 through the second accelerator connecting wire 77 so that the rotation speed of the engine can be set in advance even if necessary, even near the cab 19 of the vehicle according to the work average load. An accelerator pedal 76 connected to the engine side accelerator lever may be further installed.

In addition, according to the present invention, as shown in Figure 12 so that instead of the accelerator pedal 76, the stopping portion is supported on the horizontal support shaft 72 of the support frame 71 to be able to rotate back and forth. The second auxiliary accelerator control lever 79 may be further installed, in which case the lower end of the second auxiliary accelerator control lever 79 is the main accelerator control lever 51 and the first auxiliary accelerator control lever at the time of forward and backward rotation thereof. The first link 35 connecting the 52 is connected to the first link 35 through the second link 75 which is added to move left and right. In addition, the connection structure of the second auxiliary accelerator control lever 79 and the horizontal support shaft 72 is the same as the connection structure of the first auxiliary accelerator control lever 52 with respect to the vertical support shaft 45. It is desirable to allow the pivoting state of the accelerator adjustment lever 79 to be fixed at an arbitrary position.

Next, the operation of the multi-pilot apparatus according to the present invention configured as described above will be described.

By operating the main accelerator control lever 51 or the first auxiliary accelerator control lever 52, the engine speed is set at a predetermined engine speed in accordance with the average workload. The pivot state of the main accelerator control lever 51 or the first auxiliary accelerator control lever 52 can be fixed by the spacers 53 holding the rotary bracket 46 in accordance with the rotation of the nut 54.

Since the casting levers 31 and the first auxiliary operating lever 41 are initially in a neutral state, the hydraulic oil is supplied from the oil tank 13 to the hydraulic pump 14 by suction force driven by the hydraulic pump 14. And by returning back to the oil tank 13 via the main control valve (2) the operating part of the crane is not driven.

In order to perform the crane work in such a state, when the casting lever 31 connected to the spool 24 of the valve 21 or the first auxiliary operating lever 41 connected thereto is turned, the first link 35 and the connection thereof. The flow path of the valve 21 can be switched by moving the spool 24 by the interlocking of the members 37 and 47.

In the process of crane operation by switching the flow paths of the valves 21, the casting levers 31 or the first auxiliary operation levers 41 are further turned when the operation part is overloaded. For example, when the first auxiliary operating lever 41 is further turned forward, the first link 35 is moved to the right by the interlocking of the first link 35 connecting the casting auxiliary lever 31 with each other. Since the right driving bracket 58 of the first link 35 pushes the right dog 57 to the left, the right dog 57 is turned counterclockwise. The right driven shaft 55 rotates counterclockwise by the counterclockwise rotation of the right dog 57, and the right driven gear 59 and the driven lever 60 which are fixed to the right driven shaft 55 are also half Rotate together clockwise. In addition, the left driven gear 59 fixed to the left driven shaft 55 rotates in a clockwise direction according to the counterclockwise rotation of the right driven gear 59, and accordingly, the left driven shaft 55 also rotates in a clockwise direction. Turn around. Since this operation is similarly performed even when the casting lever 31 is pulled backward, the description thereof will be omitted.

In the turning process of the driven shafts 55 as described above, the first accelerator connecting wire 63 is tensioned while the spring 61 connected to the driven lever 60 is tensioned by the counterclockwise turning of the driven lever 60. By being pulled, the accelerator lever on the engine side connected to the other end of the first accelerator connecting wire 63 is pivoted, and thus the engine speed is rapidly increased by increasing the amount of fuel supplied to the combustion chamber of the engine, and this increased engine The driving force according to the rotational speed of the pump is drawn out through the PTO shaft and immediately transferred to the hydraulic pump 14, so that the discharge flow rate of the hydraulic pump 14 is increased, so that the operating hydraulic pressure acting on the operating part is increased, thereby overloading the operating part of the crane. Can be resolved immediately.

If the first auxiliary operating lever 41 is turned backward, the first link 35 is moved to the right by the interlocking of the first link 35 connecting the first auxiliary operating lever 41 and the casting operation lever 31. Since the left driving bracket 58 of the first link 35 pushes the left dog 57 to the right, the left dog 57 pivots clockwise. The left driven shaft 55 rotates clockwise by the clockwise turning of the left dog 57, and the left driven gear 59, which is fixed to the left driven shaft 55, also rotates clockwise. According to the clockwise rotation of the left driven gear 59, the right driven gear 59 meshed with the left driven gear 59 rotates counterclockwise and the right driven shaft 55 also rotates counterclockwise. You get Since the same result as above is obtained even when the casting work lever 31 is rotated forward, the description thereof is omitted.

That is, regardless of the left and right movement of the first link 35, the left driven shaft 55 is always rotated clockwise and the right driven shaft 55 is rotated counterclockwise so that the connecting wire 63 is driven lever 60. When the external force is removed by the counterclockwise turning of), the driven lever 60 is rotated clockwise by the restoring force of the spring 61 to return to its original position, and the engine rotational speed is also changed to the initial rotational speed.

If the rotational speed of the engine does not match the average workload while operating the casting operation lever 31 and the first auxiliary operation lever 41, the main accelerator control lever 51 or the first auxiliary accelerator control lever ( 52) by turning again to fix the engine speed.

On the other hand, on the left and right sides of the crane base 1, when the field of view is obstructed and the operation is not possible, the robot is moved up the support frame 71 to operate the second auxiliary operation levers 73 of the second auxiliary operation lever part 7. When the second auxiliary operation levers 73 are turned back and forth, the second link 75 is turned left and right so that the first link 35 is moved from side to side, and thus, the casting operation levers 31 or the first auxiliary parts as described above. As in the case of operating the operating levers 41, the flow path switching and the engine speed adjustment for the valves 21 can be performed.

In addition, when the engine speed is lower than the average workload, when the pedal pedal 76 is pedaled, the engine speed may be increased by the traction of the second accelerator connection wire 77. When the second auxiliary accelerator adjusting lever 79 is installed, the second auxiliary accelerator adjusting lever 79 is further turned back and forth. A lower end of the second auxiliary accelerator control lever 79 is connected to the first link 35 connecting the main accelerator control lever 51 and the first auxiliary accelerator control lever 52 to each other through the second link 75. Therefore, the first link 35 is moved left and right, and thus the rotation speed of the engine is adjusted as in the case of operating the main accelerator control lever 51 and the first auxiliary accelerator control lever 52 as described above. By operating the second auxiliary operation levers 73 in this state, the same result as when the casting operation lever 41 and the first auxiliary operation levers 51 are operated can be obtained.

According to the multiple control device according to the present invention configured as described above, the casting operation levers 31 or the first auxiliary operation lever 41, the main accelerator control lever 51 or the first auxiliary accelerator control lever 52 Since the engine speed can be arbitrarily adjusted simply by simple operation of the engine, even when the crane is overloaded, this can be easily solved, and thus the crane work can be efficiently performed.

In addition, through the second auxiliary operation lever portion 7, the accelerator pedal 76 or the second auxiliary accelerator control lever 79, the flow path switching of the valves 21 while ensuring a good field of view near the cab 19 of the vehicle and Since the rotation speed of the engine can be adjusted, the crane work can be performed more easily, and the safety accident can be prevented.

Claims (6)

A main accelerator control lever installed to be able to swing back and forth adjacent to lower portions of the casting operation levers of the main control valve installed on the left side of the crane base; A first auxiliary accelerator which is installed on the right side of the crane base in a vertical support shaft of a fixed frame in which the first auxiliary operating levers are rotatably supported forward and backward in correspondence with the main accelerator control lever, Control lever; A plurality of first links connecting the casting operation levers and the first auxiliary operation levers to be interoperable, and linking the main accelerator control levers and the first auxiliary accelerator control levers to each other; Two driven gears which are respectively fixed to two driven shafts rotatably installed side by side with a vertical support shaft at predetermined intervals in the fixed frame and interlock with each other in cooperation with the horizontal movement of the first links; And, A crane comprising: a first accelerator connecting wire for connecting the one driven shaft and the accelerator lever on the engine side to each other and being pulled and returned by the linkage according to the left and right movement of the first link to control the engine speed. Multi-manipulators for hydraulic systems. According to claim 1, wherein both ends of the driven shaft support brackets are sequentially installed toward the first link, the free ends of the support brackets are coupled in combination with both ends of the dog arranged in parallel with the driven shaft, On both sides of the fixed frame of the one link, the two driving brackets for pivoting the dogs in the direction of movement of the first link when the first link to move the left and right between the first link, the multi-control for the hydraulic system of the crane, characterized in that Device. According to claim 2, wherein the right driven shaft is inclined to the rear left inclined driven lever, the free end of the driven lever is connected to the end of the first accelerator connecting wire, and the free end of the driven lever in the lower plate Multi-controlling device for a hydraulic system of a crane, characterized in that the other end of the driven lever return spring is connected to one end. According to claim 1, wherein the support frame having a horizontal support shaft in the center is installed at the position in front of the first link of the crane base, the support shaft four second auxiliary protruding upward between the crane base and the cap of the vehicle The stopper portion of the operation lever is rotatably coupled back and forth, and the lower ends of the second auxiliary operation levers are sequentially connected to the first links by four second links so as to move the first links left and right when turning back and forth. Multiple control device for the hydraulic system of the crane, characterized in that. The hydraulic pressure of the crane according to claim 4, wherein an accelerator pedal is installed at one end of the support frame, and the other end of the second accelerator connection wire, one end of which is connected to the accelerator lever on the engine side, is connected to the accelerator pedal. Multipilot for the system. The stopper of the second auxiliary accelerator control lever is further supported forward and backward on the horizontal support shaft, and the lower end of the second auxiliary accelerator control lever moves the first link left and right during the forward and backward swing. A multiple control apparatus for a hydraulic system of a crane, characterized in that connected to the first link by one second link.