JP2010184620A - Air introduction device of engine type industrial vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the intake load of air supplied to an engine. <P>SOLUTION: The portion of a left rear post 20L having a fill opening 26 above the fill opening 26 has a hollow structure to form an air introduction passage 42. An air inlet port 41 is provided in the upper part of the air introduction passage 42, and an outlet port 43 is provided in the lower part of the air introduction path 42. A partition plate 44 is located between the outlet port 43 and the fill opening 26. The outlet port 43 is provided above the fill opening 26. An outlet box 46 that is in communication with the outlet port 43 is attached to the left rear post 20L. An air cleaner 48 is provided immediately beneath the outlet box 46. The air cleaner 48 and the intake port of an engine 21 is interconnected by an air introducing hose 49. Thus, the distance from the air cleaner to the intake port of the engine is shortened, and a flow passage resistance is reduced. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an air introduction device that uses a hollow head guard post as an air introduction path in an engine-type industrial vehicle such as a forklift or an excavator loader.

  Conventionally, for example, as shown in Patent Document 1, a head guard post that supports a ceiling guard member on a driver seat of a forklift is formed in a hollow shape and used as an air introduction path for supplying combustion air to an engine. .

  A head guard that covers the driver's seat of the forklift, except for a small one, has a pair of left and right head guard posts standing on the front and rear of the vehicle body 2, and upper ends of the front and rear head guard posts. A ceiling guard member is supported on the wall. As shown in FIG. 6, an engine room 3 is formed in the vehicle body 2 in which the left and right rear head guard posts 1 </ b> R and 1 </ b> L are erected, and the engine 4 is mounted in the center of the engine room 3. A fuel tank 5 is disposed on the left side of the engine 4, an air supply port of a carburetor 4 a provided integrally with the engine 4, and an oil tank 6 for cargo handling is disposed on the right side of the engine 4. . Further, a fuel filler opening 7 for supplying fuel to the fuel tank 5 is provided at the lower end portion of the left rear post 1L close to the fuel tank 5. A space in the right rear head guard post 1R is formed into a hollow shape to serve as an air introduction passage 7, an air inlet 7a is formed at the upper end of the air introduction passage 7, and a connection duct 7b is connected to the lower end. Yes. The connection duct 7 b is connected to the air cleaner 8, and the outlet of the air cleaner 8 is connected to the air supply port of the carburetor 4 a via the air introduction duct 9 and the manifold 10. Here, the fuel and the combustion air are supplied to the vaporizer 4a from the same side.

Utility model registration No. 2500225

However, in the above conventional structure, the air introduction duct 9 for introducing air from the air cleaner 8 bypasses the upper part of the engine 4 and is connected to the manifold 10, and the distance from the intake port 7a to the air supply port of the carburetor 4a. However, there was a problem that the intake load was large.
An object of the present invention is to solve the above problems and to provide an air introduction device for an engine-type industrial vehicle that can reduce the intake load.

  According to the first aspect of the present invention, a fuel tank is installed on the side of the air supply port of the engine in the engine room, and a pair of left and right head guard posts that are erected from the vehicle body and support the ceiling guard member are provided on both sides of the engine room. An air introduction device for an engine-type industrial vehicle provided with a fuel filler port connected to the fuel tank at a lower part of the head guard post on the air supply port side of the left and right head guard posts, An upper portion of the head guard post having an oil supply port is formed hollow to form an air introduction passage, an intake port is formed at the upper portion of the air introduction passage, and an outlet port is formed at the lower portion. A partition plate is provided between the outlet and the fuel filler port, a lead-out box communicated with the lead-out port is provided on the head guard post having the fuel filler port, and a direct connection of the lead-out box is provided. The air cleaner installed in parts, which are connected to the air supply port of the engine the outlet box through the air cleaner.

  According to a second aspect of the present invention, in the configuration of the first aspect, a rainwater inflow guard projects from the periphery of the outlet into the air introduction passage, and is provided on the bottom surface of the outlet box and around the opening connected to the air cleaner. The rainwater inflow prevention weir projecting upward from the bottom surface is formed, and drainage holes are formed at the four corners of the partition plate.

  According to the first aspect of the present invention, on the same side as the fuel filler opening, an air introduction passage is formed in the head guard post on the side where the air supply port of the engine is arranged, and immediately below the lead box attached to the lead outlet. The air cleaner is placed in the air cleaner, and the distance from the air cleaner to the fueling port of the engine carburetor is shortened sufficiently, so the air flow resistance from the intake port to the air supply port can be reduced to reduce the intake load. it can. Further, the partition plate can prevent inflow of air from other than the intake port.

  According to the second aspect of the present invention, the rainwater that flows in along with the air from the intake port into the air introduction passage by the rainwater inflow guard provided at the outlet and the rainwater inflow prevention weir provided at the outlet box. Can be effectively eliminated to prevent inflow, and rainwater can be drained from a drain hole formed in the partition plate.

1 is a schematic cross-sectional view of an engine room of a vehicle body showing an embodiment of an air introducing device for a forklift that is an engine-type industrial vehicle according to the present invention. It is a whole perspective view which shows a forklift. The right rear part head guard post of a forklift is shown, (a) is a side view, (b) is a perspective view. It is an expansion cross section which shows the outlet port and outlet box of an air introduction apparatus. The structural member of an air introduction apparatus is shown, (a) is a perspective view which shows a rainwater inflow guard, (b) is a perspective view which shows a partition plate, (c) is a longitudinal cross-sectional view which shows a rainwater inflow prevention weir. It is a general | schematic cross-sectional view which shows the air introduction apparatus of the conventional forklift.

Hereinafter, an embodiment of an air introducing device for a forklift which is an engine-type industrial vehicle according to the present invention will be described with reference to FIGS.
As shown in FIG. 2, the forklift is provided with a cargo lifting device 14 at a front portion of a vehicle body 11 having a pair of left and right driving front wheels 12 and a pair of left and right steering rear wheels 13. A balance weight 15 is provided at the rear, and a driver's seat 16 is provided at the center of the upper surface. The head guard 17 that protects the driver's seat 16 includes a top guard member 18 that covers the upper portion of the driver's seat 16 and a pair of left and right front head guard posts 19 that are erected on the front of the vehicle body 11 and a rear portion. Are supported by a pair of left and right rear head guard posts (hereinafter referred to as rear posts) 20R and 20L which are erected on the front portion of the balance weight 15.

  Further, as shown in FIG. 1, in the vehicle body 11, an engine room 23 is formed from the inside of the hood 22 below the seat 16 a of the driver seat 16 to the inside of the balance weight 15. A stationary engine 21 is installed, a fuel tank 24 is disposed on the left side of the engine 21, an air supply port of a carburetor 21 a provided integrally with the engine 21 is formed, and a right side of the engine 21 is formed. A cargo handling oil tank 25 is disposed.

  As shown in FIGS. 1, 3, and 4, a fuel filler port 26 connected to the fuel tank 24 is provided at the lower end of the left rear post 20 </ b> L. The fuel filler 26 has a front opening 32 formed in the outer surface plate 31 of the left rear post 20L, a curved concave fuel filler apron member 33 is attached, and a fuel filler cap 34 with a fuel cap 35 is attached to the bottom hole thereof. ing. A hose outlet hole 36 is formed in the inner surface plate 30, and a fuel hose 37 connected to the fuel filler 34 is led out through the hose outlet hole 36 and connected to the fuel tank 24.

  The air introduction device 40 according to the present invention has a left rear post 20L having a fuel filler opening 26 formed in a hollow shape above the fuel filler opening 26 to form an air introduction passage 42, which is formed on the outer surface plate 31 above the left rear post 20L. An air inlet 41 having a plurality of louvers 41a that are inclined from the inner upper side to the outer lower side to prevent the inflow of rainwater is formed. A lead-out port 43 is formed in the inner surface plate 30 above the fuel filler port 26 of the left rear post 20L. Further, a partition for preventing air from flowing into the air introduction passage 42 from the engine room 23 through the hose outlet hole 36 between the outlet port 43 and the fuel supply apron member 33 of the fuel supply port 26 in the left rear post 20L. A plate 44 is provided.

  As shown in FIG. 5 (b), the partition plate 44 includes a flat surface portion 44a and inclined surface portions 44c formed near the rear side of the flat surface portion 44a via bent portions 44b, and the four corner portions thereof. A drain hole is formed between the inner surface of the left rear post 20L by forming a notch 44d. The left rear post 20L has an upper end inclined toward the center side of the vehicle body 11 and forward, so that a flat portion 44a attached along the cross section in the left rear post 20L is inclined, and the flat portion 44a With the inclined surface portion 44c, rainwater flowing into the air introduction passage 42 can be guided to the cutout portion 44d and further discharged to the engine room 23 through the hose outlet hole 36. Further, since the partition plate 44 is bent at the bent portion 44b, the partition plate 44 does not fall when the partition plate 44 is disposed with the inner surface plate 30 or the outer surface plate as the lower surface, and the partition plate 44 can be easily brought into the left rear post 20L by welding. Can be positioned and attached.

  In the left rear post 20L, a rainwater inflow guard 45 protrudes from the periphery of the outlet 43 to the air introduction passage 42 so that rainwater flowing into the air introduction passage 42 is not blown into the outlet 43. As shown in FIG. 5A, the rainwater inflow guard 45 is formed in a gate shape corresponding to the rectangular shape of the outlet port 43, which includes left and right sides and an upper side, and the bottom side is deleted. It is fitted inside and protrudes and fixed to the air introduction passage 42.

  A lead-out box 46 communicated with the lead-out port 43 is attached to the inner surface plate 30 of the left rear post 20L, and the top of the lead-out box 46 is fitted into the notch 22a of the bonnet 22 so as to be on the hood 22. It is protruding. The lead-out box 46 is formed in a substantially box shape from which the mounting surface facing the lead-out port 43 is removed, and a short pipe (tubular body) 47 is connected in a vertical direction to a through hole on the bottom surface. An air cleaner 48 is disposed immediately below the outlet box 46, and the short pipe 47 and the supply port 48 i of the air cleaner 48 facing the short pipe 47 are connected via a connection hose 51. Further, as shown in FIG. 5C, the short pipe 47 protrudes upward from the bottom surface of the lead-out box 46 by a distance L or more and forms a rainwater inflow prevention weir 47a that prevents inflow of rainwater by this protrusion. Yes.

An air introduction hose 49 connected to the discharge port 48 o of the air cleaner 48 is connected to the air supply port of the carburetor 21 a of the engine 21 via the manifold 50.
In the above-described configuration, the air sucked into the air introduction passage 42 in the left rear post 20L from the intake port 41 is sent out from the lead-out port 43 to the lead-out box 46, and is arranged directly below the lead-out box 46 via the short pipe 47. The air cleaner 48 is introduced to remove dust through a filter. Then, it is sent from the discharge port 48 o of the air cleaner 48 to the carburetor 21 a of the engine 21 through the air introduction hose 49 and the manifold 50.

  According to the above configuration, the upper part of the left rear post 20L on the side close to the fuel tank 24 provided with the fuel filler port 26L is formed in a hollow shape to form the air introduction passage 42, and the upper part of the air introduction passage 42 The inlet 41 is provided at the bottom, the outlet 43 is provided at the lower portion, and the air cleaner 48 is disposed immediately below the outlet box 46 attached to the outlet 43 so that the air cleaner 48 is provided on the fuel tank 24 side of the engine 21. The distance of the air introduction hose 49 to the fueling port of the carburetor 21a can be made sufficiently short. Thereby, the flow resistance of air can be reduced and the intake load can be reduced.

Further, the partition plate 44 installed between the fuel filler port 26 and the outlet port 43 below the left rear post 20L can effectively prevent the air from flowing into the engine room 23.
Further, a rainwater inflow guard 45 projecting from the outlet 43 to the air introduction passage 42 in the left rear post 20L, and a rainwater inflow provided at an upper portion of a short pipe 47 penetrating the bottom surface of the outlet box 46. With the prevention weir 47a, the rainwater flowing into the air introduction passage 42 can be effectively removed and introduced into the air cleaner 48 without being accompanied by air. Further, the rainwater flowing into the air introduction passage 42 can be discharged to the engine room 23 side by the drain hole 44d formed in the partition plate 44.

20R, 20L Rear post (rear head guard post)
21 Engine 21a Vaporizer 22 Bonnet 23 Engine room 24 Fuel tank 26 Refueling port 32 Front opening 33 Refueling apron member 34 Refueling port 35 Fuel cap 36 Hose outlet hole 37 Refueling hose 40 Air introducing device 41 Inlet 42 Air introducing passage 43 Exit 44 Partition plate 44b Bending portion 44d Notch 45 Rainwater inflow guard 46 Derivation box 47 Short pipe (tubular body)
47a Rainwater inflow prevention weir 48 Air cleaner 49 Air introduction hose 50 Manifold

Claims (2)

A fuel tank is installed on the side of the engine air supply port in the engine room, and a pair of left and right head guard posts that are erected from the vehicle body and support the ceiling guard member are provided on both sides of the engine room. Among them, an air introduction device for an engine type industrial vehicle provided with a fuel filler port connected to the fuel tank at a lower portion of the head guard post on the air supply port side,
In the head guard post having the oil filler port, the upper part from the oil filler port is formed into a hollow shape as an air introduction passage, the intake port is formed at the upper part of the air introduction passage and the outlet port is formed at the lower part,
A partition plate is provided between the outlet port and the fuel filler port,
While providing a lead-out box communicated with the lead-out port in the head guard post having the oil filler port, an air cleaner is installed immediately below the lead-out box,
An air introduction device for an engine-type industrial vehicle, wherein the lead-out box is connected to an air supply port of the engine via the air cleaner. A rainwater inflow guard protrudes from the periphery of the outlet to the air introduction passage.
On the bottom surface of the lead-out box, around the opening connected to the air cleaner, a rainwater inflow prevention weir protruding upward from the bottom surface is formed,
The air introduction device for an engine-type industrial vehicle according to claim 1, wherein drain holes are formed at four corners of the partition plate.

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