JP5290037B2 - Construction vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a construction vehicle for making a gas spring, assisting opening and closing of a vehicle body cover, to function even when a vehicle body frame, having one end being mounted, is dismounted. <P>SOLUTION: A hydraulic shovel 1 has a structure wherein the gas spring 20, assisting opening and closing of an engine hood 14, has one end (first-end 20a) mounted on a first vehicle body frame 31 dismountable from a vehicle body section 6. The structurer additionally includes an area (first-end provisional fixing portion 32a) for provisionally fixing the first-end 20a of the gas spring 20. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a construction vehicle including a body cover that can be opened and closed.

  In recent years, working machines such as a cab including a driver's cab where an operator gets on and off a swivel mounted on a self-propelled traveling body, a boom, an arm, a bucket, etc. attached to the front or side of the cab. A hydraulic excavator equipped with a counterweight for balancing the swivel is used.

In such a hydraulic excavator, an engine cover that can be opened and closed is provided on the rear side of a vehicle body portion to which a counterweight is attached.
For example, Patent Document 1 discloses a construction machine in which an engine cover is divided into an openable / closable cover part and a fixed cover part that cannot be opened and closed, and a power source or the like to be maintained is arranged below the openable / closable cover part. Has been. As a result, it is possible to reduce the burden when opening and closing the engine cover and to improve the workability during maintenance.

However, the conventional construction machine has the following problems.
That is, in the construction machine disclosed in the above publication, the frame to which one end of the gas spring is attached may be removed in order to improve workability while the engine cover is opened during maintenance work or the like. In this case, the frame for supporting one end is lost, and it is necessary to remove the gas spring together. For this reason, there is a problem that there is no support in the state where the engine cover is opened.

  An object of the present invention is to provide a construction vehicle capable of functioning a gas spring that assists in opening and closing a vehicle body cover even when a vehicle body frame with one end attached is removed.

  A construction vehicle according to a first aspect of the present invention includes a vehicle body portion, a first vehicle body frame, a second vehicle body frame, a vehicle body cover, a telescopic member, and a first temporary placement portion. The first body frame is detachable from the body portion. The second body frame is disposed in the vicinity of the first body frame and cannot be detached from the body portion. The vehicle body cover is attached to the vehicle body portion so as to be openable and closable. The elastic member has one end attached to the detachable first vehicle body frame and the other end attached to the vehicle body cover, and supports the vehicle body cover when the vehicle body cover is opened and closed. The first temporary placement portion is provided on the second vehicle body frame side, and one end of the telescopic member is temporarily fixed when the first vehicle body frame is removed.

  Here, in a construction vehicle such as a hydraulic excavator, one end of a telescopic member such as a gas spring that assists in opening and closing a vehicle body cover such as an engine hood is attached to a detachable frame (first vehicle body frame). When the first vehicle body frame is removed to open the vehicle body cover and perform maintenance or the like in the vehicle body portion in order to increase the work space, the one end of the expansion / contraction member is fixed to the frame (first Temporarily fixed to the first temporary placement portion provided on the (2 body frame) side.

Here, as the first temporary placement portion, for example, a sheet metal member in which an opening is formed can be used so that one end of the elastic member can be temporarily fixed.
Thereby, even when one end of the telescopic member is fixed to the detachable first body frame, when the first body frame is removed, the first body frame is provided on the second body frame side to which the one end is fixed. The temporary opening and closing of the vehicle body cover can be supported by the expansion and contraction member by temporarily fixing to the one temporary placement portion. Therefore, it is possible to remove the first vehicle body frame to ensure a sufficient working space, and to open and close while supporting the vehicle body cover by the elastic member.

  A construction vehicle according to a second invention is the construction vehicle according to the first invention, wherein the telescopic member is fully retracted when the body cover is closed in a state where one end is temporarily fixed to the first temporary placement portion. When the state is shifted, the vehicle body cover is supported in a state where a predetermined gap is provided from the vehicle body portion.

  Here, when the vehicle body cover is closed and the expansion / contraction member shifts to the fully contracted state in a state where one end of the expansion / contraction member is temporarily fixed to the first temporary placement portion, the expansion / contraction member remains in a state where the vehicle body cover is in a predetermined gap. Supported by.

  Thereby, the operator who removed the 1st body frame for maintenance etc. recognizes that the end of an expansion-contraction member is temporarily fixed to the 1st temporary placement part from the body cover not closing completely. Can do. Therefore, it can prevent forgetting to move an expansion-contraction member to a normal attachment position.

A construction vehicle according to a third aspect of the present invention is the construction vehicle according to the first or second aspect of the present invention, wherein the vehicle body cover has a second temporary placement portion to which the other end of the telescopic member is temporarily fixed.
Here, a temporary storage place for temporarily fixing the other end of the elastic member is also provided on the vehicle body cover side.

  Thereby, even when it is necessary to remove both ends of the expansion and contraction member, the both ends can be temporarily fixed to the first and second temporary placement parts, so that the vehicle body cover can be opened and closed by the expansion and contraction member.

A construction vehicle according to a fourth aspect of the present invention is the construction vehicle according to any one of the first to third aspects, wherein the vehicle body cover is an engine hood.
Here, an engine hood is used as the vehicle body cover that can be opened and closed.

  Thus, while the engine hood that is normally opened and closed is supported by the expansion and contraction member, the first body frame can be removed and work such as inspection and repair of equipment installed around the engine can be performed.

  According to the construction vehicle according to the present invention, the first vehicle body frame to which one end of the expansion / contraction member is fixed can be removed to secure a sufficient working space, and the vehicle body cover is supported by the expansion / contraction member while opening and closing. Can do.

1 is an overall view showing a configuration of a hydraulic excavator according to an embodiment of the present invention. FIG. 2 is a side view showing a state when the engine hood mounted on the hydraulic excavator in FIG. 1 is opened and closed with a gas spring in a normal position. The side view which shows a state when opening and closing about the engine hood mounted in the hydraulic shovel of FIG. 1 in the state which exists in the position where the gas spring was temporarily fixed. (A), (b) is the perspective view and side view which show the structure of the attachment part vicinity in case one end of a gas spring exists in a regular position. (A) is a perspective view which shows the state which has the end of a gas spring in a regular position. (B) is a perspective view showing a configuration around a mounting portion of a first vehicle body frame that is detachable from the vehicle body portion. (A), (b) is the front view and side view which show the structure of the attachment part periphery in the engine hood in which the other end of a gas spring is attached. (A), (b) is the front view and perspective view which show the structure of the attachment part periphery in case one end of a gas spring exists in a temporarily fixed position. The perspective view which shows the structure of an engine room periphery. The perspective view which shows the state which installed the engine hood in the engine room of FIG. The perspective view which shows the structure inside an engine hood. The side view which shows the structure inside an engine hood.

  A hydraulic excavator (construction vehicle) 1 according to an embodiment of the present invention will be described below with reference to FIGS.

[Configuration of hydraulic excavator 1 as a whole]
As shown in FIG. 1, a hydraulic excavator 1 according to the present embodiment includes a lower traveling body 2, a swivel base 3, a work implement 4, a counterweight 5, a vehicle body portion 6, an equipment room 9, and a cab 10. And.

  The lower traveling body 2 has the crawler belt P wound around the left and right ends in the traveling direction to rotate the hydraulic excavator 1 forward and backward, and the swivel base 3 is mounted on the upper surface side in a state where the swivel base 3 can be turned. Yes.

The swivel base 3 can turn in any direction on the lower traveling body 2, and has a work machine 4, a counterweight 5, a vehicle body portion 6, and a cab 10 mounted on the upper surface.
The work machine 4 is configured to include a boom 11, an arm 12 attached to the tip of the boom 11, and a bucket 13 attached to the tip of the arm 12. The work machine 4 moves the boom 11, the arm 12, the bucket 13 and the like up and down by the hydraulic cylinders 11a, 12a and 13a included in a hydraulic circuit (not shown), and the earth and sand and gravel on the site of the civil engineering work. Excavation work.

  The counterweight 5 is made of, for example, scrap iron or concrete in a box formed by assembling steel plates and hardened. The counterweight 5 has a vehicle body portion 6 on the swivel base 3 to balance the vehicle body during mining. It is provided behind.

  As shown in FIG. 1, the vehicle body 6 is disposed at a position adjacent to the counterweight 5 and has an upper opening for inspection covered by an openable engine hood 14. The vehicle body 6 accommodates an engine, a cooling core, and the like (not shown) that are power sources for driving the lower traveling body 2 and the work implement 4. The opening / closing structure of the engine hood 14 provided in the vehicle body 6 will be described in detail later.

The equipment room 9 is disposed behind the work machine 4 and houses a fuel tank, a hydraulic oil tank, an operation valve, and the like (not shown).
The cab 10 has an indoor space in which an operator of the hydraulic excavator 1 gets on and off, and is disposed on the left front side which is the side of the work machine 4 on the swivel 3 so that the tip of the work machine 4 can be seen. ing.

(Opening and closing structure of engine hood 14)
In the present embodiment, the openable / closable engine hood 14 disposed behind the vehicle body 6 is opened and closed using a gas spring (expandable member) 20 while assisting opening and closing. Then, when performing maintenance of various devices around the engine disposed below the upper opening covered by the engine hood 14, the mounting position of the gas spring 20 is the first part of the skeleton portion of the vehicle body 6. The engine hood 14 is opened and closed by moving from the vehicle body frame 31.

  As shown in FIGS. 1 to 3 and FIGS. 8 and 9, the engine hood 14 is attached so that the rear end portion is disposed in the vicinity of the first vehicle body frame 31 disposed at a position adjacent to the counterweight 5. Yes. Further, as shown in FIGS. 10 and 11, the engine hood 14 has a second end attachment portion 14a and a second end temporary fixing portion (second temporary attachment portion) to which the second end 20b of the gas spring 20 is attached on the inner surface. And a placing portion) 14b. The second end attachment portion 14 a is provided near the end portion on the inner wall surface of the engine hood 14. The second end temporary fixing portion 14 b is provided closer to the center portion of the inner wall surface of the engine hood 14.

  As shown in FIGS. 2, 3, 8, and 9, the first vehicle body frame 31 is located in the vicinity of the center of the engine room in the width direction along the width direction of the vehicle body portion 6. Are installed in adjacent positions.

  As shown in FIGS. 2, 3, 8, and 9, the second vehicle body frame 32 is disposed at a position adjacent to the counterweight 5 at the end of the engine room on the side of the vehicle body. The first body frame 31 is supported at the portion.

  First, as shown in FIG. 2, one end portion (first end 20 a) of the gas spring 20 is attached to the first end attachment portion 31 a of the first vehicle body frame 31 in a normal state. The other end (second end 20 b) is attached to a second end attaching portion 14 a fixed inside the engine hood 14. That is, the gas spring 20 assists the opening and closing of the engine hood 14 while extending and contracting with the first end 20a attached to the first vehicle body frame 31 and the second end 20b attached to the engine hood 14, respectively. The first end attachment portion 31a is provided in the middle of the detachable first body frame 31 and slightly closer to the second body frame 32.

  On the other hand, when the engine hood 14 is opened and maintenance work or the like is performed, the first end 20a of the gas spring 20 is attached at the normal time as shown in FIG. 3 in order to widen the maintenance space and improve workability. The first body frame 31 thus removed is removed. That is, the first body frame 31 is detachable. Therefore, when the 1st vehicle body frame 31 is removed from the vehicle body part 6, the 1st end 20a of the gas spring 20 fixed to there will lose an attachment destination.

  In the present embodiment, in the configuration in which the engine hood 14 is opened and closed using the gas spring 20 having the first end 20a fixed to the detachable first body frame 31, the first end 20a is temporarily set. A temporary storage area for fixing is provided at another position.

  Specifically, the first end 20 a of the gas spring 20 attached to the first vehicle body frame 31 is a first end temporary fixing portion (first temporary placement portion) of the second vehicle body frame 32 fixed to the vehicle body portion 6. Part) 32a. Here, the second vehicle body frame 32 is not attachable to and detachable from the vehicle body portion 6. The first end temporary fixing portion 32 a is provided in the vicinity of the joint portion of the second vehicle body frame 32 with the first vehicle body frame 31.

  Thereby, even when the detachable first vehicle body frame 31 is removed during maintenance work or the like, the first end 20a of the gas spring 20 is provided on the second vehicle body frame 32 fixed to the vehicle body portion 6. By moving to the one-end temporary fixing portion 32a, the engine hood 14 can be opened and closed with the gas spring 20 still functioning.

  Further, in the present embodiment, along with the transfer of the first end 20a, the second end 20b on the engine hood 14 side is also provided at a position different from the second end mounting portion 14a on the inner surface of the engine hood 14. It is moved to the second end temporary fixing part 14b.

  Here, with the first end 20a transferred to the first end temporary fixing portion 32a and the second end 20b transferred to the second end temporary fixing portion 14b, the engine hood 14 is closed while the gas spring 20 is expanded and contracted. Then, as shown in FIG. 3, even if the gas spring 20 is fully contracted, the engine hood 14 is opened by a predetermined gap d.

  Thereby, for example, an operator who performs maintenance opens the engine hood 14, removes the first vehicle body frame 31, moves the first end 20a and the second end 20b of the gas spring 20 to the temporarily fixed position, and performs the work. When the engine hood 14 is closed as it is, the engine hood 14 is not completely closed, so that the operator can recognize that the gas spring 20 has been moved to the temporarily fixed position. Therefore, after the work is completed, the operator can avoid the gas spring 20 from being returned to the normal position or the removed first body frame 31 from being attached to the original position. can do.

<Relocation of gas spring 20>
In the present embodiment, as described above, the first end 20a and the second end 20b of the gas spring 20 are attached to the normal attachment as the first body frame 31 is removed from the body portion 6 during maintenance work or the like. Move from position to temporarily fixed position.

  First, at the normal time, the second end 20b of the gas spring 20 is a second end provided on the inner surface of the engine hood 14 as shown in FIGS. 4 (a), 4 (b), and 5 (a). It is attached to the attachment portion 14a. One end of the second end attachment portion 14a is a sheet metal member welded and fixed to the inner surface of the engine hood 14, and is formed in the vicinity of the center portion of the support portion 14aa formed by bending the tip portion thereof. Opening 14ab. Then, the snap pin 41 is attached to the tip end portion of the pin 42 in a state where the pin 42 is inserted into the central opening of the washer 43 in the second end attaching portion 14a. As a result, the pin 42 is inserted into the opening formed in the second end 20b and fixed by the snap pin 41, thereby improving the detachability on the second end 20b side and transferring the gas spring 20 described above. It can be done easily.

  Next, the first end 20a of the gas spring 20 at the normal time is attached to a first end attaching portion 31a provided on the first vehicle body frame 31, as shown in FIG. The first end attachment portion 31a has a support portion 31aa where the tip of the sheet metal member is bent and an opening portion 31ab formed near the center of the support portion 31aa. When fixing the first end 20a of the gas spring 20 to the first end mounting portion 31a, a pin (not shown) is inserted into the opening 31ab and the opening of the first end 20a, and the above-described pin clip or the like is inserted. Use to fix.

  As described above, in the normal state, the gas spring 20 has the first end 20a on the first end mounting portion 31a of the first body frame 31 and the second end 20b on the second end mounting portion 14a on the engine hood 14 side. , Each attached.

  On the other hand, when the first vehicle body frame 31 is removed during the maintenance work described above, first, the engine hood 14 is opened, and the first end 20a of the gas spring 20 is removed from the first vehicle body frame 31. Then, the second end 20 b is removed from the engine hood 14.

  Next, the first end 20 a of the gas spring 20 is transferred to the first end temporary fixing portion 32 a of the second vehicle body frame 32, and the second end 20 b is transferred to the second end temporary fixing portion 14 b of the engine hood 14.

  As shown in FIGS. 6A and 6B, the second end temporary fixing portion 14b is provided in the vicinity of the second end mounting portion 14a on the inner surface of the engine hood 14 (FIGS. 2 and 3). FIG. 5 (a)). Similarly to the second end mounting portion 14a, the second end temporary fixing portion 14b is a sheet metal member that is welded and fixed to the inner surface of the engine hood 14, and is formed by bending the tip portion thereof. And an opening 14bb formed near the center of the support 14ba. When attaching the second end 20b of the gas spring 20, the bolt 51 is inserted into the opening of the second end 20b and the opening 14bb of the second end temporary fixing portion 14b, and the bolt 51 is screwed into the nut 14bc. And conclude.

  As shown in FIGS. 7A and 7B, the first end temporary fixing portion 32a is provided on the upper portion of the second vehicle body frame 32 disposed in the vicinity of the first vehicle body frame 31, and gas The bolt 52 is inserted into the opening of the first end 20a of the spring 20, and the first end 20a is fixed by screwing with a female screw on the first end temporary fixing portion 32a side.

  As described above, in the hydraulic excavator 1 according to the present embodiment, one end (first end 20 a) of the gas spring 20 that assists in opening and closing the engine hood 14 is attached to the first vehicle body frame 31 that is detachable from the vehicle body portion 6. In the attached structure, a place (first end temporary fixing portion 32a) for temporarily fixing the first end 20a of the gas spring 20 is separately provided.

  Thus, even when the first end attachment portion 31a to which the first end 20a of the gas spring 20 is attached is removed along with the removal of the first vehicle body frame 31, the first end temporary fixing portion 32a is temporarily attached. By fixing, the gas spring 20 can be made to function again. Therefore, at the time of maintenance work or the like, the work space can be expanded by removing the first body frame 31, and the engine hood 14 can be opened and closed while maintaining the function of the gas spring 20 as it is.

[Other Embodiments]
As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of invention.

(A)
In the above embodiment, when maintenance or the like in the engine hood 14 is performed, as shown in FIG. 3, when the first vehicle body frame 31 is removed, both ends (first end 20a, second end) of the gas spring 20 are removed. 20b) is moved to the temporary fixing positions (first end temporary fixing portion 32a, second end temporary fixing portion 14b) and the engine hood 14 is opened and closed. However, the present invention is not limited to this.

  For example, the engine hood 14 may be opened and closed by moving only the detachable first end 20a of the gas spring 20 on the first body frame 31 side to the temporarily fixed position.

(B)
In the above embodiment, the engine hood 14 that can be opened and closed in the vertical direction has been described as an example of the vehicle body cover that can be opened and closed with respect to the vehicle body portion 6. However, the present invention is not limited to this.

  For example, the present invention may be applied to a construction vehicle equipped with a gas spring or the like that opens and closes an openable door that can be opened and closed in the horizontal direction.

(C)
In the said embodiment, the example which used the gas spring 20 as an expansion-contraction mechanism which assists opening and closing of the engine hood 14 was given and demonstrated. However, the present invention is not limited to this.
For example, an oil damper or the like may be used as the expansion / contraction mechanism.

(D)
In the said embodiment, the hydraulic excavator 1 was mentioned as an example and demonstrated as the construction vehicle which concerns on this invention. However, the present invention is not limited to this.

  For example, the present invention can be similarly applied to other construction vehicles such as a wheel loader or a bulldozer in which an opening / closing door is attached to the vehicle body.

  The construction vehicle of the present invention can secure a sufficient work space by removing the first body frame to which one end of the gas spring is fixed, and can be opened and closed while supporting the body cover by the gas spring. Since it produces an effect, it can be widely applied to various construction vehicles equipped with an open / close door supported by a gas spring.

1 Hydraulic excavator (construction vehicle)
DESCRIPTION OF SYMBOLS 2 Lower traveling body 3 Turning base 4 Working machine 5 Counterweight 6 Car body part 9 Equipment room 10 Cab 11 Boom 11a Hydraulic cylinder 12 Arm 12a Hydraulic cylinder 13 Bucket 13a Hydraulic cylinder 14 Engine hood 14a 2nd end attachment part 14aa Support part 14ab opening Portion 14b second end temporary fixing portion (second temporary placement portion)
14ba support part 14bb opening part 14bc nut 20 gas spring (expandable member)
20a 1st end 20b 2nd end 31 1st vehicle body frame 31a 1st end attachment part 31aa Support part 31ab Opening part 32 2nd vehicle body frame 32a 1st end temporary fixing part (1st temporary placement part)
41 Snap pin 42 Pin 43 Washer 51, 52 Bolt d Clearance

JP 2006-56326 A (published March 2, 2006)

Claims (4)

The body part,
A first body frame detachable from the body part;
A second body frame that is disposed in the vicinity of the first body frame and cannot be detached from the body portion;
A vehicle body cover that is attached to the vehicle body portion in an openable and closable state;
One end is attached to the detachable first body frame, and the other end is attached to the body cover, and a telescopic member that supports the body cover when the body cover is opened and closed,
A first temporary placement portion provided on the second vehicle body frame side, to which the one end of the telescopic member is temporarily fixed when the first vehicle body frame is removed;
Construction vehicle equipped with. When the vehicle body cover is closed and transitions to a fully contracted state in a state where the one end is temporarily fixed to the temporary placement portion, the vehicle body cover is provided with a predetermined gap from the vehicle body portion. Support,
The construction vehicle according to claim 1. The vehicle body cover has a second temporary placement part to which the other end of the elastic member is temporarily fixed.
The construction vehicle according to claim 1 or 2. The vehicle body cover is an engine hood.
The construction vehicle according to any one of claims 1 to 3.

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