Work vehicle

• US 10,458,309 B2
• Filed: 12/28/2016
• Issued: 10/29/2019
• Est. Priority Date: 12/28/2016
• Status: Active Grant

• Current Assignee: Komatsu Ltd.
• Original Assignee: Komatsu Ltd.
• Inventors: Seto, Yohei
• Primary Examiner(s): Huynh, Hai H
• Application Number:
  US15/533,163
• Publication Number:
  US 20180258831A1
• Time in Patent Office: 1,035 Days
• Field of Search: 123 417, 123 4149
• CPC Class Codes: B60K 11/04 Arrangement or mounting of radiators, radiator shutters, or radiator blinds B60K11/085 takes precedence
• CPC Class Codes: B60Y 2200/41 Construction vehicles, e.g. graders, excavators
• CPC Class Codes: E02F 9/0866 Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment
• CPC Class Codes: F01P 11/10 Guiding or ducting cooling-air, to, or from, liquid-to-air heat exchangers
• CPC Class Codes: F01P 2070/50 mounting fans to heat-exchangers
• CPC Class Codes: F01P 5/02 Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
• CPC Class Codes: F01P 5/06 Guiding or ducting air to, or from, ducted fans
• CPC Class Codes: F04D 19/002 Axial flow fans
• CPC Class Codes: F04D 25/04 the pump being fluid-driven pumps driven by exhaust gases F02B37/00, F02B39/00; turbochargers F02C6/12
• CPC Class Codes: F04D 29/601 specially adapted for elastic fluid pumps
• CPC Class Codes: F04D 29/703 specially for fans, e.g. fan guards

Abstract

A work vehicle includes a blower unit that includes a movable bracket rotatably supported to a vehicle body, a fan supported to the movable bracket and rotationally driven around an axis, and a movable shroud covering the fan from an outer peripheral side. The movable shroud includes a shroud body supported so as to face the movable bracket and surrounding the fan, a ring shroud formed in an annular shape and provided between the shroud body and an outer peripheral end of the fan, and a bolt fixing the ring shroud to the shroud body from a side opposite to a side on which is supported to the movable bracket when viewed from the shroud body.

Claims

1. A work vehicle, comprising:

a vehicle body that includes a heat exchange room in which an opening portion facing a rear side is formed;

a cooling unit that is provided in the heat exchange room and includes a rear surface facing the rear side; and

a blower unit that includes;

a structure member rotatably supported to the vehicle body at one end of the vehicle body in a width direction of the vehicle body around a rotation axis extending in a vertical direction,

a fan supported to the structure member and rotationally driven around an axis, and

a movable shroud covering the fan from an outer peripheral side,

wherein the blower unit is rotatable between a closed position and an open position, the closed position being a position at which the blower unit faces the rear surface of the cooling unit and the axis is positioned in a forward-backward direction of the vehicle body, the open position being the position at which the blower unit exposes the rear surface of the cooling unit,

wherein the movable shroud includes

a shroud body that is supported so as to face the structure member and surrounds the fan,

a ring shroud that is formed in an annular shape and is provided between the shroud body and an outer peripheral end of the fan, and

a fixing portion that fixes the ring shroud to the shroud body from a side opposite to a side on which the shroud body is supported to the structure member.

2. The work vehicle according to claim 1,

wherein the ring shroud is configured of a plurality of segment pieces formed by a segmentation of the ring shroud in a peripheral direction, and

wherein the fixing portion fixes each segment piece to the shroud body.

3. The work vehicle according to claim 2,

wherein the ring shroud includes

a tubular portion that includes an inner peripheral surface facing the outer peripheral end of the fan in the peripheral direction, and

a flange portion that is provided to extend from the tubular portion to the outer peripheral side, abuts on the shroud body from the opposite side, and is fixed to the shroud body by the fixing portion.

4. The work vehicle according to claim 3,

wherein the shroud body includes a bolt fixing-hole extending in a direction of the axis,

wherein the flange portion of the ring shroud includes a bolt through-hole penetrating the flange portion in the direction of the axis, and

wherein the fixing portion is a bolt that includes a shaft portion penetrating the bolt through-hole and fixed to the bolt fixing-hole.

5. The work vehicle according to claim 4,

wherein an inner diameter of the bolt through-hole is larger than an outer diameter of the shaft portion, and

wherein the bolt abuts on the flange portion from the opposite side, and further includes a head portion having an outer diameter that is larger than the inner diameter of the bolt through-hole.

6. The work vehicle according to claim 3,

wherein the fan includes

a hydraulic motor that is driven by a hydraulic pressure, and

a fan body that includes a plurality of blades fixed to a drive shaft of the hydraulic motor,

wherein the work vehicle further includes a hydraulic pipe which is provided on the other side of the shroud body in the direction of the axis and through which a hydraulic pressure is supplied to the hydraulic motor.

7. The work vehicle according to claim 2,

wherein the fan includes

a hydraulic motor that is driven by a hydraulic pressure, and

a fan body that includes a plurality of blades fixed to a drive shaft of the hydraulic motor,

wherein the work vehicle further includes a hydraulic pipe which is provided on the other side of the shroud body in the direction of the axis and through which a hydraulic pressure is supplied to the hydraulic motor.

8. The work vehicle according to claim 2,

wherein the vehicle body includes

a pair of rear frame that extends in the forward-backward direction at intervals therebetween in a width direction of the vehicle body;

an exterior cover that is provided above the rear frame and in which the heat exchange room is formed inside the exterior cover; and

a bumper that is provided to extend in the width direction over the pair of rear frames on the rear sides of the rear frames, includes an upper surface which becomes the rear passage, and partitions and forms the opening portion along with the exterior cover,

wherein the shroud body is supported to the structure member from the rear side when the blower unit is at the closed position, and

wherein the fixing portion fixes the shroud body to the ring shroud from the front side when the blower unit is at the closed position.

9. The work vehicle according to claim 2,

wherein the ring shroud has four segment pieces.

10. The work vehicle according to claim 1,

wherein the ring shroud includes

a tubular portion that includes an inner peripheral surface facing the outer peripheral end of the fan in the peripheral direction, and

a flange portion that is provided to extend from the tubular portion to the outer peripheral side, abuts on the shroud body from the opposite side, and is fixed to the shroud body by the fixing portion.

11. The work vehicle according to claim 10,

wherein the shroud body includes a bolt fixing-hole extending in a direction of the axis,

wherein the flange portion of the ring shroud includes a bolt through-hole penetrating the flange portion in the direction of the axis, and

wherein the fixing portion is a bolt that includes a shaft portion penetrating the bolt through-hole and fixed to the bolt fixing-hole.

12. The work vehicle according to claim 11,

wherein an inner diameter of the bolt through-hole is larger than an outer diameter of the shaft portion, and

wherein the bolt abuts on the flange portion from the opposite side, and further includes a head portion having an outer diameter that is larger than the inner diameter of the bolt through-hole.

13. The work vehicle according to claim 12,

wherein the fan includes

a hydraulic motor that is driven by a hydraulic pressure, and

a fan body that includes a plurality of blades fixed to a drive shaft of the hydraulic motor,

wherein the work vehicle further includes a hydraulic pipe which is provided on the other side of the shroud body in the direction of the axis and through which a hydraulic pressure is supplied to the hydraulic motor.

14. The work vehicle according to claim 12,

wherein the vehicle body includes

a pair of rear frame that extends in the forward-backward direction at intervals therebetween in a width direction of the vehicle body;

an exterior cover that is provided above the rear frame and in which the heat exchange room is formed inside the exterior cover; and

a bumper that is provided to extend in the width direction over the pair of rear frames on the rear sides of the rear frames, includes an upper surface which becomes the rear passage, and partitions and forms the opening portion along with the exterior cover,

wherein the shroud body is supported to the structure member from the rear side when the blower unit is at the closed position, and

wherein the fixing portion fixes the shroud body to the ring shroud from the front side when the blower unit is at the closed position.

15. The work vehicle according to claim 11,

wherein the fan includes

a hydraulic motor that is driven by a hydraulic pressure, and

a fan body that includes a plurality of blades fixed to a drive shaft of the hydraulic motor,

wherein the work vehicle further includes a hydraulic pipe which is provided on the other side of the shroud body in the direction of the axis and through which a hydraulic pressure is supplied to the hydraulic motor.

16. The work vehicle according to claim 11,

wherein the vehicle body includes

a pair of rear frame that extends in the forward-backward direction at intervals therebetween in a width direction of the vehicle body;

an exterior cover that is provided above the rear frame and in which the heat exchange room is formed inside the exterior cover; and

a bumper that is provided to extend in the width direction over the pair of rear frames on the rear sides of the rear frames, includes an upper surface which becomes the rear passage, and partitions and forms the opening portion along with the exterior cover,

wherein the shroud body is supported to the structure member from the rear side when the blower unit is at the closed position, and

wherein the fixing portion fixes the shroud body to the ring shroud from the front side when the blower unit is at the closed position.

17. The work vehicle according to claim 10,

wherein the fan includes

a hydraulic motor that is driven by a hydraulic pressure, and

a fan body that includes a plurality of blades fixed to a drive shaft of the hydraulic motor,

wherein the work vehicle further includes a hydraulic pipe which is provided on the other side of the shroud body in the direction of the axis and through which a hydraulic pressure is supplied to the hydraulic motor.

18. The work vehicle according to claim 10,

wherein the vehicle body includes

a pair of rear frame that extends in the forward-backward direction at intervals therebetween in a width direction of the vehicle body;

an exterior cover that is provided above the rear frame and in which the heat exchange room is formed inside the exterior cover; and

a bumper that is provided to extend in the width direction over the pair of rear frames on the rear sides of the rear frames, includes an upper surface which becomes the rear passage, and partitions and forms the opening portion along with the exterior cover,

wherein the shroud body is supported to the structure member from the rear side when the blower unit is at the closed position, and

wherein the fixing portion fixes the shroud body to the ring shroud from the front side when the blower unit is at the closed position.

19. The work vehicle according to claim 1,

wherein the fan includes

a hydraulic motor that is driven by a hydraulic pressure, and

a fan body that includes a plurality of blades fixed to a drive shaft of the hydraulic motor,

wherein the work vehicle further includes a hydraulic pipe which is provided on the other side of the shroud body in the direction of the axis and through which a hydraulic pressure is supplied to the hydraulic motor.

20. The work vehicle according to claim 1,

wherein the vehicle body includes

a pair of rear frame that extends in the forward-backward direction at intervals therebetween in a width direction of the vehicle body;

an exterior cover that is provided above the rear frame and in which the heat exchange room is formed inside the exterior cover; and

a bumper that is provided to extend in the width direction over the pair of rear frames on the rear sides of the rear frames, includes an upper surface which becomes the rear passage, and partitions and forms the opening portion along with the exterior cover,

wherein the shroud body is supported to the structure member from the rear side when the blower unit is at the closed position, and

wherein the fixing portion fixes the shroud body to the ring shroud from the front side when the blower unit is at the closed position.