JP2011246215A - Forklift - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely install an oil tank in a vehicle body frame, without separately arranging an installation member for installing the oil tank in the vehicle body frame of a forklift.SOLUTION: The oil tank 1 is constituted of a tank part 2 for storing a hydraulic fluid, a tank cover part 3 for covering an opening 21 of the tank part 2, and a base part 4 arranged between the tank part 2 and the tank cover part 3 and capable of installing the tank cover part 3 in the tank part 2. The base part 4 is integrally formed with installation parts 43a and 43b for installing the oil tank 1 in the vehicle body frame 50. The oil tank 1 is stored in a storage part 51 formed of the vehicle body frame 50. An installation bolt 46 is inserted into and fastened-fixed to an installation hole 45 of the installation parts 43a and 43b and an installation hole of side surfaces 51a and 51b of the storage part 51, and thereby, the oil tank 1 is installed in the vehicle body frame 50.

Description

  The present invention relates to an oil tank mounting structure in a forklift.

  The forklift is provided with an elevating mechanism composed of a fork or the like for carrying out cargo handling. Since the elevating mechanism is generally operated by hydraulic pressure, the forklift includes an oil tank that stores hydraulic oil required for operating the elevating mechanism. The oil tank is attached to the body frame of the forklift.

  A conventional forklift oil tank mounting structure is shown in FIG. The forklift includes an oil tank 60 described in Patent Document 1. The forklift includes a vehicle body frame 61 that constitutes a vehicle body, and the oil tank 60 is stored in a storage portion 62 formed by the vehicle body frame 61. Further, the forklift includes an attachment member 63, and the oil tank 60 stored in the storage portion 62 is pressed against the bottom surface of the storage portion 62 from above by the attachment member 63. Then, in a state where the oil tank 60 is pressed by the mounting member 63, the mounting member 63 is mounted to the side surface of the storage portion 62 with the mounting bolt 64, and the oil tank 60 is pressed and fixed to the bottom surface of the storage portion 62. It was.

  However, such an attachment structure of the oil tank 60 by the attachment member 63 has a problem that the cost of the entire forklift increases due to the necessity of the attachment member 63. Further, the oil tank 60 itself is substantially only pressed from above by the mounting member 63, and the fixing is unstable.

JP 2002-195202 A

  Therefore, a problem to be solved by the present invention is to provide a forklift capable of securely attaching an oil tank to a vehicle body frame without separately providing an attachment member.

In order to solve the above problems, a forklift according to the present invention is a forklift equipped with an oil tank.
The oil tank has an opening for storing oil, a tank cover for covering the opening, a base for attaching the tank cover to the tank, and an attachment for attaching the oil tank to the body frame. And the mounting portion is formed integrally with the base portion.

  Preferably, the attachment portion is provided on the front side or the rear side and the left side or the right side with respect to the vehicle body.

  Preferably, the attachment portion is formed to protrude upward on the side surface of the base portion.

  Preferably, when the oil tank is stored in the vehicle body frame, the attachment surface of the attachment portion and the attachment surface of the vehicle body frame are combined.

  Preferably, the base part is welded to the edge of the opening of the tank part.

  Preferably, the base part is integrally formed with the tank part.

  In the forklift according to the present invention, the attachment portion for attaching the oil tank to the vehicle body frame is formed integrally with the base portion for attaching the tank cover portion to the tank portion.

  Therefore, the oil tank can be attached to the vehicle body frame without providing a separate attachment member as in the prior art. That is, the cost of the entire forklift can be reduced by eliminating the need for the attachment member.

  In addition, the oil tank can be securely fixed to the vehicle body frame, not the unstable fixing such as the conventional case where the oil tank is pressed from above with the mounting member and fixed.

It is a figure which shows the oil tank attached to the forklift which concerns on this invention. 2A and 2B are diagrams illustrating a configuration of an oil tank, in which FIG. 2A shows a tank cover portion, FIG. 2B shows a base portion, and FIG. 2C shows a tank portion. It is a side view which shows the base part of an oil tank. It is a perspective view which shows the vehicle body of the forklift which concerns on this invention. It is a figure which shows the attachment structure of the oil tank of the forklift which concerns on this invention. It is a figure which shows the attachment structure of the conventional oil tank.

  Hereinafter, embodiments of a forklift according to the present invention will be described with reference to the drawings.

  The forklift includes an oil tank 1 that stores oil (hydraulic oil) for a hydraulic circuit, as shown in FIG. The oil tank 1 is configured as follows.

  As shown in FIG. 2C, the oil tank 1 includes a tank portion 2 as a container for storing oil. The tank portion 2 is made of resin, and a rectangular opening 20 is formed on the upper surface. Further, a rectangular frame-shaped edge portion 21 is formed at the edge of the opening 20.

  Further, the oil tank 1 includes a metal tank cover portion 3 as shown in FIG. 2A. The tank cover portion 3 includes a cover body 30 formed in a rectangular shape so as to cover the opening 20 of the tank portion 2. An oil supply port 31 for supplying oil to the tank unit 2 is formed in the cover main body 30, and a cap 32 for closing the oil supply port 31 is attached to the oil supply port 31. Furthermore, the tank cover portion 3 includes two hydraulic pipes 33 and 34 so as to penetrate the cover body 30 up and down. One of the pipes for hydraulic piping 33 is a suction pipe 33 for supplying the oil stored in the tank unit 2 to the hydraulic circuit, and the other 34 is connected to the hydraulic circuit via the return filter 35. This is a return pipe 34 for allowing oil to flow into the tank 2 again.

  Furthermore, the oil tank 1 includes a base portion 4 for enabling the tank cover portion 3 to be attached to the tank portion 2 as shown in FIGS. 2B and 3. The base portion 4 includes a resin portion 40 made of a rectangular frame-shaped resin, and a rectangular frame-shaped metal (iron) bracket 41 in which a tap hole 42 for attaching the tank cover portion 3 is formed at an appropriate position on the upper surface. Is provided. As shown in FIG. 3, the bracket 41 is insert-molded into the resin portion 40 and integrated with the resin portion 40, and the upper surface 4 a of the base portion 4 is attached to the bracket 41 for mounting the tank cover portion 3. The lower surface 4b and the side surface 4c of the base portion 4 are formed of a resin portion 40 for welding with the tank portion 1.

  Furthermore, the base portion 4 includes two attachment portions 43a and 43b for attaching the oil tank 1 to the vehicle body 5 (FIG. 4). The attachment portions 43 a and 43 b are made of resin and are formed integrally with the resin portion 40. Further, the attachment portions 43 a and 43 b are formed so as to protrude upward on the side surface 4 c of the base portion 4. The mounting portions 43 a and 43 b are provided with a mounting surface 44 formed of a vertical surface and a mounting hole 45 penetrating horizontally for mounting to the vehicle body 5 at the protruding portions.

  Of the two attachment portions 43a and 43b, one attachment portion 43a is provided at the right end of the rear side surface 4c of the base portion 4 with respect to the vehicle body 5, and the other attachment portion 43b is provided on the left side of the base portion with respect to the vehicle body 5. It is provided at the front end of the side surface 4c.

  The oil tank 1 includes the tank part 2, the tank cover part 3, and the base part 4 as described above. The base portion 4 is attached to the tank portion 2 by welding the lower surface 4b made of the resin portion 40 and the upper surface of the edge portion 21 of the tank portion 2 made of resin by ultrasonic welding. Integrated into

  Further, the lower part of the cover 33 for hydraulic piping of the tank cover part 3 from the cover body 30 is inserted into the tank part 2 through the opening 20 so that the cover body 30 covers the entire opening 20 of the tank part 2. And disposed on the upper surface 4 a of the base portion 4. Then, the bolt 36 is inserted into the hole formed in the cover body 30 and the tap hole 42 of the base portion 4 corresponding to this hole, and the cover body 30 is fixed to the upper surface 4 a of the base portion 4. Thus, the tank cover portion 3 is attached to the tank portion 2 via the base portion 4, and the oil tank 1 shown in FIG. 1 is configured.

  FIG. 4 shows a vehicle body 5 of a forklift to which the oil tank 1 having the above configuration is attached. In front of the vehicle body 5, an elevating mechanism (not shown) composed of a fork controlled by hydraulic pressure is provided to constitute a forklift.

  The vehicle body 5 includes a vehicle body frame 50 that constitutes the vehicle body 5. By the vehicle body frame 50, a storage portion 51 for storing the oil tank 1 is formed on the front right side of the vehicle body 5 below the operation portion 52 such as a handle and behind the front wheel 53. When the oil tank 1 is attached to the vehicle body frame 50, the oil tank 1 is stored in the storage portion 51.

  FIG. 5 shows how the oil tank 1 is attached to the vehicle body frame 50. When the oil tank 1 is stored in the storage portion 51, the mounting surfaces 44 of the mounting portions 43a and 43b are aligned with the mounting surfaces 51a and 51b of the vehicle body frame. At this time, the mounting surface 44 of one mounting portion 43 a is aligned with the rear side surface 51 a of the storage portion 51, and similarly, the mounting surface 44 of the other mounting portion 43 b is aligned with the left side surface 51 b of the storage portion 51. .

  Then, the mounting holes 45 of the mounting portions 43a and 43b and the mounting holes (not shown) of the side surfaces 51a and 51b of the storage portion 51 are aligned, the mounting bolts 46 are inserted into these, and the mounting portions 43a and 43b are connected to the storage portion 51. The oil tank 1 is attached to the vehicle body frame 50 by being fastened and fixed to the side surfaces 51a and 51b.

  Further, the suction pipe 33 and the return pipe 34 of the tank cover part 3 are connected to a hydraulic mechanism such as an elevating mechanism, and the attachment of the oil tank 1 to the forklift is completed.

  In mounting the oil tank 1, one mounting portion 43 a is provided on the rear side with respect to the vehicle body 5, and the other mounting portion 43 b is provided on the left side with respect to the vehicle body 5. As described above, the mounting portions 43a and 43b are provided at two positions on the rear side and the left side with respect to the vehicle body 5 and are attached to the vehicle body frame 50, so that the oil tank 1 can be accommodated in the storage portion 51 by the vibrations of the vehicle body 5 in the front and rear directions. Can be prevented from shaking inside. That is, the oil tank 1 can be stably fixed so that it can withstand both forward and backward vibrations.

  Further, when the oil tank 1 is mounted, the mounting portions 43 a and 43 b are formed so as to protrude upward from the side surface 4 c of the base portion 4. As a result, the attachment portions 43 a and 43 b are positioned above the cover body 30 attached to the upper surface 4 a of the base portion 4. That is, the mounting holes 45 of the mounting portions 43 a and 43 b are configured to be located higher than the upper surface of the oil tank 1. By providing the mounting hole 45 at a position higher than the upper surface of the oil tank 1 in this way, when the oil tank 1 stored in the storage portion 51 is fixed by the mounting bolt 46, the operator attaches the mounting bolt 46 to the mounting hole 45. The oil tank 1 can be easily inserted and tightened, and the workability of mounting the oil tank 1 is improved.

  Further, in the mounting of the oil tank 1, one mounting portion 43a is connected to the right end of the rear side surface of the base portion 4 with respect to the vehicle body 5, and the other mounting portion 43b is connected to the front end of the left side surface of the base portion 4 with respect to the vehicle body 5. Provided. As described above, by providing the two attachment portions 43a and 43b on the side surface 4c of the base portion 4 at symmetrical positions, the oil tank 1 can be more stably fixed. Further, by providing the two attachment portions 43a and 43b at the end of the side surface 4c of the base portion 4, when the operator connects the pipes 33 and 34 for hydraulic piping to the hydraulic circuit, the attachment portions 43a and 43b. However, this connection work is not disturbed.

  In this embodiment, in the base portion 4, a metal bracket 41 in which a tap hole 42 is formed is insert-molded in the resin portion 40, and the tank cover portion 3 is attached by the bracket 41. However, instead of insert-molding the bracket 41 into the resin portion 40, a nut corresponding to the bolt 36 may be insert-molded into the resin portion 40, and the tank cover portion 3 may be attached by this nut.

  In this embodiment, the base portion 4 on which the attachment portions 43 a and 43 b are formed is welded to the tank portion 2, but the base portion 4 may be formed integrally with the tank portion 2. That is, a member to be the base portion 4 is not separately provided and welded to the tank portion 2, but, for example, attachment portions 43a and 43b are formed on the edge portion 21 of the tank portion 2 and the bracket 41 is insert-molded. It may be a configuration. Thereby, the member which comprises the base part 4 can also be abbreviate | omitted, and the cost as the whole forklift can be further reduced.

  In the present embodiment, the attachment portion 43a of the base portion 4 is provided on the rear side with respect to the vehicle body 5, but this may be on the front side. Similarly, the attachment portion 43b may be on the right side instead of the left side with respect to the vehicle body 5. That is, if the oil tank 1 is mounted so as to be able to withstand both the front and rear and left and right vibrations of the vehicle body 5, the mounting portions 43a and 43b are either on the front side or the rear side of the vehicle body 5 in the base portion 4. It may be provided on either the left side or the right side of the vehicle body 5.

Oil tank 1
Tank part 2
Opening 20
Edge 21
Tank cover part 3
Cover body 30
Suction pipe 33
Return pipe 34
Base part 4
Resin part 40
Bracket 41
Tap hole 42
Mounting part 43a, 43b
Mounting surface 44
Mounting hole 45
Mounting bolt 46
Body 5
Body frame 50
Storage part 51
Side surface of storage part (mounting surface of body frame) 51a, 51b

Claims (7)

Forklifts with oil tanks
The oil tank is
A tank portion having an opening for storing oil;
A tank cover that covers the opening;
A base portion for attaching the tank cover portion to the tank portion;
An attachment portion for attaching the oil tank to the vehicle body frame,
The forklift characterized in that the attachment portion is formed integrally with the base portion.   The forklift according to claim 1, wherein the attachment portion is provided on a front side or a rear side and a left side or a right side with respect to a vehicle body.   The forklift according to claim 1, wherein the attachment portion is formed to protrude upward on a side surface of the base portion.   The forklift according to claim 3, wherein when the oil tank is stored in the vehicle body frame, the mounting surface of the mounting portion and the mounting surface of the vehicle body frame are combined.   The forklift according to any one of claims 1 to 4, wherein the attachment portion is made of resin.   The forklift according to any one of claims 1 to 5, wherein the base portion is welded to an edge of the opening of the tank portion.   The forklift according to any one of claims 1 to 5, wherein the base portion is formed integrally with the tank portion.

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