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JP-2026074571-A - Work vehicle

JP2026074571AJP 2026074571 AJP2026074571 AJP 2026074571AJP-2026074571-A

Abstract

[Problem] To provide a work vehicle that can effectively and inexpensively suppress vibrations of the control unit. [Solution] A coil spring 21 is provided between a holding member 20 attached to the vehicle body and the control unit 16. The coil spring 21 holds the control unit 16 in a suspended state to the holding member 20 and absorbs vibrations. [Selection Diagram] Figure 3

Inventors

  • 美澤 晴太
  • 北 侑祐
  • 中川 貴央
  • 橋本 泉希
  • 日向 黎

Assignees

  • 株式会社クボタ

Dates

Publication Date
20260507
Application Date
20241021

Claims (5)

  1. Control unit and A retaining member attached to the vehicle body, A work vehicle is provided with a coil spring, which is placed between the holding member and the control unit, and which holds the control unit in the holding member in a suspended and supported state, and absorbs vibrations.
  2. A guide rod formed in the control unit in an upward-extending manner is held by the holding member in a manner that allows it to pass through the unit holding portion provided in the holding member so as to be able to move up and down. The work vehicle according to claim 1, wherein the coil spring is fitted onto the guide rod above the unit holding portion and is sandwiched between the spring receiving portion provided on the guide rod and the unit holding portion to suspend and support the control unit, and is elastically deformed by the downward movement of the control unit relative to the holding member.
  3. A guide rod formed in the control unit in an upward-extending manner is held by the holding member in a manner that allows it to pass through the unit holding portion provided in the holding member so as to be able to move up and down. The coil spring is fitted onto the guide rod above the unit holding portion and is sandwiched between the spring receiving portion provided on the guide rod and the unit holding portion to suspend and support the control unit, and is elastically deformed by the downward movement of the control unit relative to the holding member. A second coil spring is provided, fitted onto the guide rod below the unit holding portion. The work vehicle according to claim 1, wherein the second coil spring is sandwiched between the second spring receiving portion provided on the guide rod and the unit holding portion, and is elastically deformed by the upward movement of the control unit relative to the holding member.
  4. The work vehicle according to claim 3, wherein the guide rod, the coil spring, and the second coil spring are provided at multiple locations in the lateral direction of the control unit.
  5. The guide rod forming member that forms the guide rod is connected to the control unit, thereby forming the guide rod on the control unit. The work vehicle according to claim 2 or 3, wherein the guide rod forming member is connected to the control unit via a cushioning material.

Description

This invention relates to a work vehicle. As shown in Patent Document 1, there is a work vehicle (tractor) equipped with a control unit (engine control unit). Japanese Patent Publication No. 2012-201159 This is a side view of the tractor, seen from the left side.This is a side view showing the support structure of the control unit.This is a front view showing the support structure of the control unit.This is a cross-sectional view taken along line IV-IV in Figure 3. Hereinafter, an embodiment of the present invention will be described based on the drawings. In the following explanation, with respect to the tractor (an example of a "work vehicle"), the direction of arrow F shown in Figures 1 and 2 is referred to as the "front of the vehicle," the direction of arrow B shown in Figures 1 and 2 is referred to as the "rear of the vehicle," the direction of arrow U shown in Figures 1 and 2 is referred to as the "upper part of the vehicle," and the direction of arrow D shown in Figures 1 and 2 is referred to as the "lower part of the vehicle." The direction of arrow L shown in Figure 3, which is on the front side of the paper in Figure 1, is referred to as the "left side of the vehicle," and the direction of arrow R shown in Figure 3, which is on the back side of the paper in Figure 1, is referred to as the "right side of the vehicle." The left-right direction of the vehicle corresponds to the width of the vehicle. [Overall configuration of the tractor] The tractor shown in Figure 1 is a ride-on type implement configured by connecting various working devices, such as a rotary tiller, to the rear of the vehicle body. As shown in Figure 1, the tractor has a vehicle body 4 equipped with a vehicle frame 3. The vehicle frame 3 is composed of an engine 1, a transmission case 2 extending rearward from the rear of the engine 1, etc. A pair of left and right front wheels 5 are mounted on the front of the vehicle frame 3 so as to be steerable and drivable. A pair of left and right rear wheels 6 are mounted on the rear of the vehicle frame 3 so as to be drivable. A drive unit 7 is formed at the front of the vehicle body 4. The drive unit 7 is equipped with an engine 1, as well as an engine bonnet 8, etc. A driver's compartment 9 is formed at the rear of the vehicle body 4. The driver's compartment 9 is equipped with a driver's seat 10, a steering wheel 11 for steering the front wheels 5, and an instrument panel 12. The rear of the transmission case 2 is provided with a linkage mechanism 14 that connects to the work device so that it can be raised and lowered, and a power extraction shaft (not shown) that extracts power from the engine 1 and transmits it to the work device. [Control Unit] As shown in Figure 1, a control unit 16 (hereinafter referred to as "ECU 16") is provided inside the rear portion 8a of the engine bonnet 8, behind the engine 1 and below the instrument panel 12. In this embodiment, the ECU 16 is responsible for controlling the engine 1. As shown in Figures 2 and 3, a retaining member 20 is provided above the ECU 16 on the vehicle body 4. The ECU 16 is suspended and supported by a first coil spring 21 provided between the ECU 16 and the retaining member 20, and is held by the retaining member 20 via the first coil spring 21. In this embodiment, the first coil spring 21 is provided at two locations in the lateral direction of the ECU 16. Vibrations are absorbed by the first coil spring 21 between the retaining member 20 and the ECU 16, suppressing vibrations of the ECU 16 caused by driving vibrations and engine vibrations transmitted to the retaining member 20. More specifically, as shown in Figure 2, the retaining member 20 is fixed to a support rod 23 that extends in the lateral direction of the vehicle body at a location corresponding to the rear of the retaining member 20. The retaining member 20 is fixed to the support rod 23 by welding. The support rod 23 is supported by the handle post 24, which is erected on the vehicle body frame 3. The retaining member 20 is mounted on the vehicle body 4, connected to the vehicle body frame 3 via the support rod 23 and the handle post 24. The support rod 23 supports the clutch pedal 17 (see Figure 1), brake pedal (not shown), etc. As shown in Figures 2 and 3, the holding member 20 is composed of a strip material formed in a U-shape that opens backward in a plan view. A unit holding portion 20a, which is an L-shaped plate member in a side view, is provided at the front of the holding member 20. The L-shaped plate member is connected to the holding member 20 by connecting bolts. Two upward-extending guide rods 26 are formed at two locations in the lateral direction of the ECU 16. The two guide rods 26 on the ECU 16 are formed by connecting a guide rod forming member 27, which has the two guide rods 26 at its upper part, to the ECU 16. The two guide rods 26 are inserted vertically and horizontally into through holes 20b provided in the unit holding portion 20a and are