JP2000309282A - Chassis frame for truck - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to easily change a fixing position in a cross member to fix a rear part of a transmission using common parts without decreasing strength of a chassis frame. SOLUTION: A chassis frame 11 comprises a pair of side members 12, 12 arranged extendedly in a direction of travel of a truck and a plurality of cross members 14 installed widthwise over a pair of the side members 12, 12. A fixing portion 14a to fix a rear part of transmission of a truck is arranged in a central portion of the upper surface of a cross member 14 among the plurality of cross members. The fixing portion 14a is arranged in a manner deflected forwardly or rearwardly of the truck with respect to the centerline of the cross member 14 extending widthwise. The installed cross member 14 is configured so that it can be installed over the pair of side members with its front and back inverted and the fixing portion 14a facing upward. It is preferable to interpose reinforcing plates between respective side members and cross member and form a plurality of fixing holes on the side members beforehand.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a truck chassis frame provided with a pair of side members and a plurality of cross members provided on the side members. More particularly, the present invention relates to a chassis frame of a truck having an alligator-type cross member provided with a mounting portion for mounting a rear portion of a transmission.

[0002]

2. Description of the Related Art Heretofore, there has been known a chassis frame having a pair of side members and a plurality of cross members provided on the side members. The engine provided in front of the truck is arranged between a pair of side members and is supported by the pair of side members. A transmission provided at the rear of the engine is disposed between a pair of side members at the rear of the engine, and a rear end of the transmission is attached to one of the cross members. By supporting the rear end of the transmission by the cross member in this manner, it is possible to suppress the so-called transmission irregularity when the truck travels on a rough road or the like. On the other hand, the length of the engine and the transmission provided in the rear part differ depending on the type of truck. For example, an engine has a different length due to a difference in displacement, and a transmission having only a main transmission and a transmission having a main transmission and a subtransmission have different lengths. For this reason,
Conventionally, the mounting position of the cross member for mounting the rear part of the transmission is changed based on the length of the engine and the transmission according to the type of truck, or the rear part of the transmission is mounted on a mounting member provided separately from the cross member. I was

[0003]

However, changing the mounting position of the cross member for mounting the rear part of the transmission involves a change in the process of manufacturing the chassis frame. In particular, in a chassis frame in which a cross member is erected through a plurality of mounting holes formed in a side member, creating a plurality of types of side members in which the plurality of mounting holes are shifted increases the number of man-hours for managing the side members. There are some defects. Also, attaching the rear part of the transmission to an attachment member provided separately from the cross member requires equipment and a process for manufacturing the separate member, and further separates the separate member and the side member into a process for manufacturing the chassis frame. Since an additional step of erection is added, the change operation is relatively difficult, and there is a problem that the unit price of the chassis frame itself is increased.

In order to solve this problem, a plurality of mounting holes more than the number required for the side members are formed in advance.
It is conceivable to change the mounting position of the cross member by selecting a predetermined mounting hole from the plurality of mounting holes and erection of the cross member. However, since the unused mounting holes remain in the side members, there is a problem that the strength of the chassis frame itself is reduced due to the presence of the holes. SUMMARY OF THE INVENTION An object of the present invention is to provide a chassis frame of a truck in which parts to be used can be shared without lowering the strength of the chassis frame, and a mounting portion of a cross member for mounting a rear portion of a transmission can be easily changed forward or rearward. .

[0005]

The invention according to claim 1 is
As shown in FIGS. 1 and 5, a pair of side members 12, 12 are provided extending in the track traveling direction, and a plurality of cross members 14 are installed on the pair of side members 12, 12 to extend in the vehicle width direction. Mounting portion 14a for mounting the rear portion of the truck transmission 10c at the center of the upper surface of one cross member 14 of the plurality of cross members.
Is an improvement of the chassis frame 11 of the truck provided with the symbol. The characteristic configuration is that the mounting portion 14a is provided so as to be deviated forward or rearward of the truck 10 with respect to the center line of the cross member 14 extending in the vehicle width direction, and the mounted cross member 14 is turned upside down. It is configured so that it can be installed on the pair of side members 12 with the upper surface 14a. In the invention according to the first aspect, the cross member 14 is installed on the pair of side members 12, 12 with the front and rear portions thereof reversed, so that the cross member 14 is provided, for example, so as to be biased forward of the track with respect to the center line of the cross member 14. As shown in FIG. 6, the mounting portion 14a shown in FIG. 1 is provided so as to be deviated rearward of the track 10 with respect to its center line, and the mounting portion 14a substantially moves rearward.

The invention according to claim 2 is the invention according to claim 1, and furthermore, as shown in FIG. 2, a pair of side members 12 are spaced apart from each other at the upper end of the outer wall 12a and the outer wall 12a. The first mounting hole 12d is formed at the lower end of the upper side flange 12b in which the first mounting holes 12d are formed and the lower end of the outer wall 12a.
and a lower flange 12c in which five second mounting holes 12e are formed, respectively, in opposition to the upper flange 12b. One cross member 14 is a continuous four of the five first mounting holes 12d of the upper flange 12b. Four third mounting holes 1 corresponding to
Four fourth mounting holes 14f are provided at both ends so that 4e corresponds to four continuous ones of the five second mounting holes 12e of the upper member 14b and the lower flange 12c respectively formed at both ends. And a lower member 14c formed and joined to the upper member 14b.
The first reinforcing plate 17 in which five fifth mounting holes 17a are formed corresponding to 2d is interposed between both ends of the upper member 14b and the upper flange 12b, respectively, and the five second mounting holes 12e are provided. The second reinforcing plate 18 in which five sixth mounting holes 18a are formed so as to correspond to, is interposed between both ends of the lower member 14c and the lower flange 12c, respectively.
The fastening member 19 is inserted into the third and fifth mounting holes 12d, 14e, 17a, and the second, fourth, and sixth mounting holes 12e, 1
By inserting the fastening member 19 into the 4f, 18a, the cross member 14 is bridged between the pair of side members 12, 12, and the remaining first and fifth portions where the third mounting holes 14e do not face each other.
The fastening member 19 is inserted into the mounting holes 12d and 17a and the fourth
Remaining second and sixth mounting holes 1 not facing mounting holes 14f
By inserting the fastening member 19 into the 2e, 18a, the first
A truck chassis frame in which the reinforcing plate 17 and the second reinforcing plate 18 are fixed to the upper flange 12b and the lower flange 12c, respectively.

In the invention according to claim 2, the cross member 1
4, four third and fourth mounting holes 14 respectively.
e and 14f are selectively made to correspond to the five first and second mounting holes 12d and 12e, respectively, formed in the side member 12, so that the cross member 14 is moved from the state of FIG. 1 to the state shown in FIG. Moving from the rear to the front or from the state of FIG. 6 to the front to the rear as shown in FIG.
a moves forward or backward with the movement. on the other hand,
The remaining first mounting hole 12 not facing the third mounting hole 14e
The fastening member 19 is inserted into the remaining second mounting hole 12 e where the fourth mounting hole 14 f is not opposed to the first reinforcing plate 17.
And the second reinforcing plate 18 is fixed to the upper flange 12b and the lower flange 12c, respectively.
Are reinforced and do not reduce the strength of the chassis frame 11.

[0008]

Embodiments of the present invention will now be described in detail with reference to the drawings. As shown in FIG. 5, the engine 1 mounted on the front of the chassis frame 11 of the truck 10
A transmission 10c is connected to the rear end of Oa via a clutch 10b. The chassis frame 11 has a pair of side members 12 (only one side is shown) extending in the track traveling direction and arranged in parallel with each other, and a plurality of cross members 14 extending on the pair of side members 12 so as to extend in the vehicle width direction. (Only 1 is shown in the figure). Engine 10a, clutch 10b and transmission 10c
Is disposed between the pair of side members 12. The transmission 10c in this embodiment is a normal five- or six-speed transmission composed of a main transmission, and a speed increasing device is connected to the rear end of the main transmission in order to further increase the number of stages of the main transmission. It is formed shorter than the transmission. The rear portion of the transmission 10c is attached to an attachment portion 14a of the cross member 14 via an attachment member 16.

As shown in FIGS. 1 and 2, the side member 12 is formed in a channel shape, and has an outer wall 12a, an upper flange 12b connected to an upper end of the outer wall 12a, and a lower end of the outer wall 12a. Lower flange 12c connected continuously
And Five first mounting holes 12d are formed at intervals on the upper flange 12b, and five second mounting holes 12d are formed on the lower flange 12c so as to face the first mounting holes 12d.
Mounting holes 12e are respectively formed.

As shown in FIGS. 3 and 4, the cross member 14 to which the rear part of the transmission 10c is mounted via the mounting member 16 has an inverted hat shape in cross section with an upper member 14b having a hat shape in cross section. This is a so-called alligator-type cross member made by superposing the lower member 14c formed on the upper surface and joining the overlapping flange portions with rivets 14d. FIG.
As shown in FIG. 3, the upper member 14b has four third mounting holes 14e at both ends thereof corresponding to four continuous ones of the five first mounting holes 12d of the upper flange 12b. The lower member 14c is formed with four continuous four mounting holes 12e of the lower flange 12c.
Fourth mounting holes 14f are formed at both ends so as to correspond to the individual pieces. By forming in this manner, the cross member 14 is formed bilaterally symmetrically. Even if the cross member 14 is turned upside down, a pair of side members 12
It can be installed on

As shown in FIG. 1 and FIG.
Is formed at the center of one of the overlapped flanges of the upper member 14b and the lower member 14c, and the center of the flange is formed wider than the other flange. The mounting portion 14a is formed by the wide flange portion and four member holes 14g (FIG. 3) formed in the flange portion. By forming the mounting portion 14a on one flange portion in this manner,
The mounting portion 14a is a cross member 14 extending in the vehicle width direction.
The track 10 is provided so as to be deviated forward or backward of the track 10 with respect to the center line of the track 10.

As shown in FIG. 2, first reinforcing plates 17 are interposed between both ends of the upper member 14b and the upper flange 12b, respectively, and are provided between both ends of the lower member 14c and the lower flange 12c. Are provided with the second reinforcing plates 18 respectively. As shown in FIGS. 2 and 3, the first reinforcing plate 17 includes
Five fifth mounting holes 17a are formed to correspond to the five first mounting holes 12d, and five fifth mounting holes 17a are formed in the second reinforcing plate 18 so as to correspond to the five second mounting holes 12e. 6 mounting holes 18
a is formed. The first and second reinforcing plates 17, 18
Is resistance-welded in advance with the respective mounting holes aligned with the upper member 14b and the lower member 14c, as shown in FIG. As shown in FIG. 2, the first reinforcing plate 17 is interposed between both ends of the upper member 14b and the upper flange 12b by disposing the cross member 14 on the pair of side members 12, 12 in that state. , The second reinforcing plate 18 is connected to both ends of the lower member 14c and the lower flange 12.
c, respectively.

As shown in FIG. 2, the first, third and fifth mounting holes 12d, 14e and 17 communicate with each other by disposing the cross member 14 on the pair of side members 12, 12.
A fastening member 19 is inserted into a, and the fastening member 19 is also inserted into the second, fourth, and sixth mounting holes 12e, 14f, and 18a. The fastening member in this embodiment is a rivet 1
9, whereby the cross member 14 is bridged between the pair of side members 12. On the other hand, the third mounting hole 14
e of the remaining first and fifth mounting holes 12d and 1
A rivet 19 is also inserted into 7a, and the remaining second and sixth mounting holes 12e and 18a are not opposed to the fourth mounting hole 14f.
Similarly, the rivet 19 is inserted. This makes the first
The reinforcing plate 17 and the second reinforcing plate 18 are fixed to the upper flange 12b and the lower flange 12c, respectively, and the strength of the chassis frame 11 is not reduced by reinforcing the side members 12 of the unused mounting holes.

As shown in FIGS. 1 and 5, one cross member 14 of the chassis frame 11 constructed as described above is used.
The rear end of the transmission 10c is attached to the transmission.
The mounting is performed via the mounting member 16 and the mounting member 1
6 has one end screwed to the rear end of the transmission 10c. As shown in FIG. 1, the other end of the mounting member 16 faces the mounting portion 14a of the cross member 14, and the facing portion is mounted to the mounting portion 14a by a rivet 19 through a member hole 14g. As described above, the rear end of the transmission 10c is supported by the cross member 14, and the transmission 10c having the rear end supported is the truck 10c.
Is suppressed when the vehicle travels on a bad road or the like.

In order to mount transmissions having different lengths on the chassis frame 11 having such a configuration, the front and rear of the cross member 14 are reversed or the five members formed on the side members 12 and 12 are formed in accordance with the length. First
And the cross member 14 itself is moved forward or backward in the range of the second mounting holes 12d and 12e. For example, as shown in FIG. 7, a case where the transmission 20c has a main transmission 20a and a speed increasing device 20b connected to the rear end of the main transmission 20a will be described. The mounting portion 14a shown in FIG. 1 is provided so as to be deviated to the front of the track 10 with respect to the center line thereof as shown in FIG. Thus, the mounting portion 14a moves rearward. By attaching the other end of the mounting member 16 to the mounting portion 14a moved rearward in this way and mounting the facing portion to the mounting portion 14a, the rear end of the transmission 20c can be cross-membered without providing a new member. 14 can be attached.

When the cross member 14 itself is to be moved forward or backward, four third and fourth mounting holes 14e and 14f formed in the cross member 14 are respectively provided.
This is performed by selectively corresponding to the five first and second mounting holes 12d and 12e formed in the side member 12, respectively. As a result of this selection, when the cross member 14 moves forward as shown in FIG. 8 from the state of FIG. 1, the mounting portion 14a of the cross member 14 also moves forward along with the movement, as shown in FIG. 9 from the state of FIG. As described above, when the cross member 14 moves rearward, the mounting portion 1 of the cross member is moved.
4a moves backward with the movement. By attaching the other end of the attachment member 16 to the attachment portion 14a moved forward or backward in this way, the rear end of the transmission 10c or 20c can be attached to the cross member 14 without providing a new member. In this case, if the first and second reinforcing plates 17 and 18 are fixed to the upper member 14b and the lower member 14c in advance, the worker can make the fifth and sixth reinforcing plates 17 and 18 of the five types. Mounting holes 17a, 18
a into the first and second mounting holes 12d, 12e of the side members.
The cross member 14 is connected to the pair of side members 1 by a simple operation of merely inserting the rivet 19 so as to face each other.
2 and 12 can be reliably installed in a desired state.

[0017]

As described above, according to the present invention, the mounting portion is provided so as to be deviated forward or rearward with respect to the center line of the cross member, and the cross member which is turned upside down is installed on the pair of side members. Since the configuration is made possible, it is possible to easily change the mounting portion to the front or the rear without providing a new member by a simple operation change in which the front and rear sides are erected. In particular, in a chassis frame in which a cross member is erected through a plurality of mounting holes formed in the side member, five mounting holes for mounting the cross member are formed in each of the side members, and of the five mounting holes. If four mounting holes are formed at both ends of the cross member so as to correspond to four continuous ones, the cross member moves forward or backward by arbitrarily selecting the mounting hole.
In this case, since the fastening member is inserted in a state where the reinforcing member is attached to the unused mounting hole, the side member is reinforced, and the strength of the chassis frame does not decrease. As a result,
It is possible to easily change the position of the mounting portion for mounting the transmission rear portion of the cross member without lowering the strength of the chassis frame.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a chassis frame of the present invention.

FIG. 2 is a cross-sectional view of FIG.
FIG.

FIG. 3 is a top view of the cross member.

FIG. 4 is a front view of the cross member.

FIG. 5 is a perspective view of a truck showing a state in which a rear portion of a transmission is attached to the cross member.

FIG. 6 is a perspective view corresponding to FIG. 1 showing a chassis frame in which the cross member is inverted and installed on a side member.

FIG. 7 is a perspective view of a truck showing a state in which a rear portion of a transmission is attached to a cross member which is erected and inverted.

FIG. 8 is a perspective view corresponding to FIG. 1, showing a chassis frame in which the cross member moves forward and is mounted on a side member.

FIG. 9 is a perspective view corresponding to FIG. 6, showing the chassis frame in which the cross member moves rearward and is mounted on the side member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Truck 10c Transmission 11 Chassis frame 12 Side member 12a Outer side wall 12b Upper flange 12c Lower flange 12d First mounting hole 12e Second mounting hole 14 Cross member 14a Mounting portion 14b Upper member 14c Lower member 14e Third mounting hole 14f 4 mounting hole 17 first reinforcing plate 17a fifth mounting hole 18 second reinforcing plate 18a sixth mounting hole 19 fastening member

Claims (2)

[Claims] 1. A pair of side members (12, 12) extending in a track traveling direction, and said pair of side members
A plurality of cross members extending in the vehicle width direction at (12, 12), and one of the plurality of cross members is provided.
Transmission of the truck (10) in the center of the upper surface of the
(10c) In a truck chassis frame (11) provided with a mounting portion (14a) for mounting a rear portion, the cross member in which the mounting portion (14a) extends in the vehicle width direction.
(14) is provided so as to be deviated to the front or rear of the track (10) with respect to the center line of the track (10), and the bridged cross member (14) is turned upside down so that the mounting portion (14a) faces upward. A truck chassis frame characterized in that it can be installed on the pair of side members (12, 12). 2. A pair of side members (12) are formed on an outer wall (12a).
And an upper flange (12b) in which five first mounting holes (12d) are formed at intervals at the upper end of the outer wall (12a) and the first mounting hole (12) at the lower end of the outer wall (12a). A lower flange (12c) in which five second mounting holes (12e) are respectively formed facing the second flange (12d), and one cross member (14) is provided on the first flange of the upper flange (12b). Four upper mounting members (14b) and four lower mounting flanges (12c) each having four third mounting holes (14e) formed at both ends thereof so as to correspond to four consecutive mounting holes (12d). Of the second mounting holes (12e) of the
And a lower member (14c) formed at both ends thereof and joined to the upper member (14b), and the four first mounting holes (14d) are formed in the five first mounting holes (12d). A first reinforcing plate (17) in which five fifth mounting holes (17a) are formed correspondingly is interposed between both ends of the upper member (14b) and the upper flange (12b), respectively. A second reinforcing plate (18) formed with five sixth mounting holes (18a) corresponding to the five second mounting holes (12e) is provided at both ends of the lower member (14c) and the second reinforcing plate (18). A fastening member (19) is inserted between the lower flanges (12c), respectively, and the first, third, and fifth mounting holes (12d, 14e, 17a) are inserted into the second, fourth, and fourth mounting holes (12d, 14e, 17a). 6th mounting hole (12
e, 14f, 18a), the cross member (14) is bridged over the pair of side members (12, 12) by inserting the fastening member (19) into the pair of side members (12, 12), and the third mounting holes (14e) do not face each other. Remaining first and fifth
Insert the fastening member (19) into the mounting holes (12d, 17a) and
The remaining second and sixth mounting holes (12
e, 18a) by inserting a fastening member (19) into the first reinforcing plate.
The chassis frame of a truck according to claim 1, wherein (17) and a second reinforcing plate (18) are fixed to the upper flange (12b) and the lower flange (12c), respectively.