JPH04125929U - Batsukuho - Google Patents

Abstract

(57) [Summary] [Purpose] The operation box A placed on the side of the seat S
Avoid obstructing the operator's getting on and off. [Structure] An accelerator lever 1 is installed upright on an operation box A provided on the side of the seat S, and on the side of the accelerator lever 1,
A lever return stopper 2 is provided, and in conjunction with the operation of moving the operation box A, the rotational speed of the engine E is reduced to idling rotation.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is used in backhoes with an operation button that has an operation lever and an accelerator lever upright. Regarding the structure of the box.

0002

[Conventional technology]

Conventionally, in construction machinery such as backhoes, the operation box has been placed on the side of the seat. However, the technology of erecting the operating lever and accelerator lever from the operating box is not known to the public. It is.

0003

[Problem that the idea aims to solve]

However, if the operation box is placed on the side of the seat, the operator will be able to get on and off the seat. The problem was that the exit passageway was narrow. The present invention is based on such conventional techniques. In order to eliminate any malfunctions, the operator must use the control box when getting on and off. The operation box can be moved to make it easier for the operator to get on and off the machine. The accelerator lever is configured to return to the engine's idling position. This is what I did.

0004

[Means to solve the problem]

The problems to be solved by this invention are as described above, and the following are the means to solve the problems. Explain. That is, the operation box A is placed on the side of the seat, and the operation box A is placed on the side of the seat. A control lever 3 and an accelerator lever 1 are installed upright, and the operator must operate them when getting on or off the vehicle. In a configuration where box A is movable, move operation box A to the evacuation side. The configuration is such that the accelerator lever 1 is forcibly moved to the idle rotation side of the engine E. This is what I did.

[0005]

[Effect]

Next, the operation of the present invention will be explained. This invention is based on an operation box placed on the side of the seat S. Move the operation box A if it interferes with the operator getting on and off the vehicle. In conjunction with the operation, the rotation speed of engine E is reduced to idling speed. be.

[0006]

【Example】

Next, an example will be described. Figure 1 is an overall side view of the backhoe of the present invention, and Figure 2 is its operation. Figure 3 is a side view of an embodiment in which box A can be rotated and retracted. A side view of an embodiment that can be slid and retracted, FIG. 4 is a view of the bucket arm 8 A cross-sectional view of the pivot portion of the bucket 6, FIG. 5 shows the work light 22 attached to the main boom 24. FIG. 6 is a perspective view showing how the work light 22 is installed, and FIG. 7 is a sectional view showing how the work light 22 is installed. 8 is a circuit diagram showing the starting safety circuit of engine E, and FIG. 8 shows the installation state of the conventional work light 22. FIG. 9 is a side view of the main boom 24 showing the mounting state of the conventional work light 22. FIG.

[0007] In Figure 1, an operation box A is placed on the side of a seat S of a backhoe. An accelerator lever 1 and an operation lever 3 are installed upright in the operation box A. . A main boom 24 is installed in front of the backhoe. The boom 24 is moved up and down by a boom cylinder 31. Also, the main boom 24 A bucket arm 8 is pivotally supported at the front end, and the bucket arm 8 is connected to an arm cylinder. It is rotated up and down by the driver 30. A bucket 6 is pivoted at the tip of the bucket arm 8. supported. Operation box A is located in the engine compartment located behind the seat. It is.

[0008] Referring to FIG. 2, the configuration of the operation box A and the accelerator lever 1 will be described. Operation box A is located on the side of seat S, on the operator's boarding and alighting passage. . Therefore, when the operator gets on and off, move the operation box A out of the way. We need to open the road. In the embodiment shown in FIG. 2, the operation box A is a box turner. It is rotatable upwards around a moving shaft 4. The operation box A has multiple operation levers. -3 is attached, and the accelerator lever 1 is also installed upright on the operation box A. Ru. The accelerator lever 1 is pivotally supported on a lever pivot shaft 13. When the accelerator lever 1 is rotated around 13, via the link or wire 12, The accelerator arm 11 of the engine E can be rotated to increase or decrease the number of revolutions.

[0009] In this configuration, the position where the accelerator lever 1 interferes above the lever pivot shaft 13 A lever return stopper 2 fixed to the side of the box rotation shaft 4 protrudes. Applicable The lever return stopper 2 does not rotate together with the rotation of the operation box A. , while operating accelerator lever 1 to the high speed rotation position, rotate operation box A. Then, the middle part of the accelerator lever 1 interferes with the lever return stopper 2, causing the low-speed acceleration It is configured so that it is returned to the idling rotation position. operator Even if the operator returns the operation box A to its original position after getting on and off the machine, the operator cannot operate it. Accelerator lever 1 should not return from the idling position unless It consists of

0010 In the embodiment shown in FIG. It is possible to slide. Then, when sliding the operation box A backward, When the accelerator lever 1 is operated to the high speed side, the lever return stopper 2 and Accelerator lever 1 interferes, and accelerator lever 1 is in the low-speed idling position. It will be returned to.

[0011] Next, the configuration of the pivot portion of the bucket 6 with respect to the bucket arm 8 will be explained with reference to FIG. do. Since the bucket 6 is repeatedly moved up and down to scoop up soil, the bucket Because play occurs between the pivot tube 16 at the tip of the cut arm 8 and the bucket pivot shaft 7, be. Conventionally, in order to absorb the play that occurs, a shim is fitted to the adjustment collar 10. The backlash was adjusted by adjusting the number of shims. This invention is equipped with an adjustment collar 10 that replaces the insertion and removal of the shim. be. A bearing collar 17 is fitted inside the pivot tube 16 at the tip of the bucket arm 8. The bucket pivot shaft 7 is fitted inside the bearing collar 17, and the bucket pivot shaft 7 is fitted inside the bearing collar 17. The shaft 7 has pivot brackets 14 and 15 projecting from the side of the bucket 6. Then, an adjustment collar 10 is interposed between the pivot brackets 15 on the side of the pivot tube 16. ing.

0012 The adjustment collar 10 is attached to a portion protruding from the pivot bracket 15 by a cover body 21. The adjustment screw 9 is screwed between the lid body 21 and the bucket pivot shaft 7, and the lid body 21 is closed. It is locked with a lock nut 9a. By screwing in the adjustment screw 9, the adjustment can be made. The maintenance collar 10 presses the pivot tube 16, and the pivot tube is pressed between the collar of the bucket pivot shaft 7 and the pivot tube 16. The racket 14 is held between them. In this state, the pivot bracket 14 is attached to the bucket pivot. By being held between the support shaft 7 and the pivot tube 16, the play of the bucket 6 is eliminated. It is.

[0013] O-rings 18 are fitted around the outer periphery of the pivot tube 16, and the adjustment collar 1 An O-ring 20 is also fitted inside the bearing collar 17, and the lubricating grease on the bearing collar 17 This prevents the thieves from escaping.

[0014] Conventionally, the work light 22 attached to the backhoe is as shown in FIGS. 8 and 9. It was arranged to protrude from the side of the main boom 24. Therefore, colliding with an obstacle In cases where there is no need to use the work light 22 during the daytime because it is easily destroyed by It was blocking Rator's view. The present invention is as shown in Figures 5 and 6. , a storage recess 25 is configured inside the main boom 24, and a storage recess 25 is formed inside the storage recess 25. This allows the business light 22 to be stored. That is, the mounting base 23 of the work light 22 is pivotally supported. It is pivotally supported by a shaft 27, and the mounting base 23 can be operated by the operator from the seat. The wire 26 enables the protrusion and storage operation.

[0015] FIG. 7 shows the safety circuit of the starting motor when engine E is started. i.e. starting motor - When the engine is rotated when the temperature is below 0℃ in cold weather, engine E sends pressure oil to the work equipment. Since the pressure pump P is being driven, the starting torque may vary due to the high viscosity of this hydraulic oil. There was a problem that the engine was always high and the gear teeth of the startup motor broke. It is. In this configuration, a temperature detection sensor 31 is provided, and the temperature detection sensor 31 detects a temperature below 0°C, the hydraulic oil is passed through the work machine hydraulic circuit 28. A short-circuit valve 29 is provided to allow the flow to flow back to the hydraulic oil tank without causing the oil to pass through the bypass. It is. Further, the bypass circuit is provided with a relief valve 30 for increasing the oil temperature.

[0016]

[Effect of the idea]

Since the present invention is configured as described above, it has the following effects. That is, When the operator gets on or off the vehicle, the engine E speed must be at idling. Since the rotation speed decreases, it is safe even if the backhoe is operated incorrectly when the backhoe is not on board. Also, when rotating operation box A to get off the vehicle, move operation of operation box A. and operating the accelerator lever 1 to low rotation without performing the two operations. Since only one operation of rotating A is required, it is possible to save time and effort.

[Brief explanation of drawings]

FIG. 1 is an overall side view of a backhoe according to the present invention.

FIG. 2 is a side view of an embodiment in which the operation box A can be rotated and retracted.

FIG. 3 is a side view of an embodiment in which the operation box A can be slid and retracted.

4 is a cross-sectional view of the pivoting portion of the bucket 6 relative to the bucket arm 8. FIG.

FIG. 5 is a perspective view showing how the work light 22 attached to the main boom 24 is attached.

FIG. 6 is a cross-sectional view showing how the work light 22 is attached.

FIG. 7 is a circuit diagram showing a starting safety circuit for engine E.

FIG. 8 is a side view of the main boom 24 showing a state in which a conventional work light 22 is attached.

FIG. 9 is a front view showing a state in which a conventional work light 22 is attached.

[Explanation of symbols]

A Operation box E engine S seat 1 Accelerator lever 2 Lever return stopper 3 Operation lever 4 Box rotation axis 6 bucket

Claims (1)

[Scope of utility model registration request] [Claim 1] An operation box A is arranged on the side of the seat,
An operating lever 3 and an accelerator lever 1 are installed upright on the operating box A, and when the operator gets on or off the operating box A, the operating lever 3 and the accelerator lever 1 are set up.
A backhoe characterized in that the accelerator lever 1 is forcibly moved to the idle rotation side of the engine E when the operation box A is moved to the retract side.