JP5138841B2 - Cab mounting method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for mounting at a plurality of locations of the frame and cab of the vehicle by a fastening member.
[0002]
[Prior art]
To attach the cab to the vehicle frame, install multiple cab mounts at the bottom of the cab, attach the mounting bracket to the frame, and secure the cab mount and mounting bracket to the frame using bolts and nuts. A cab is attached.
[0003]
In the conventional cab mount 3, as shown in FIG. 6, a bolt fastening nut 7 for fastening a mounting bolt (not shown) extending from the frame side is fixed to a plate 12 provided on the cab mount 3 by welding. There was something that was done.
[0004]
[Problems to be solved by the invention]
However, since a plurality of the above-described cab mounts 3 are provided, very high positional accuracy is required when attaching to the cab, which makes it difficult to attach. Further, when the mounting position of the cab mount 3 varies, the position of the frame with respect to the mounting bracket shifts, so that the mount bolt is inserted into the bolt tightening nut 7 at an angle, and the required motion performance is obtained. There is a problem that durability strength and quality of vibration noise cannot be secured.
[0005]
Therefore, without fixing the bolt tightening nut to the cab mount, the round hole for the bolt penetration of the mounting bracket is enlarged, and the mounting position of the bolt tightening nut is adjusted to absorb variations. However, in this case, there is a problem that the cab is not accurately positioned with respect to the frame.
[0006]
Therefore, the present invention has been devised to solve the above-described problems, and the object of the present invention is to absorb variations in the mounting position of the cab mount to the cab and to accurately position the cab with respect to the frame. The object is to provide a cab mounting method .
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the invention of claim 1 is a method of attaching a vehicle frame and a cab at a plurality of locations by fastening members provided on a plurality of cab mounts, and among the plurality of cab mounts, a fastening member. The first cab mount to which is fixed is attached to the first place among the plurality of places, and the cover body in which an elongated hole for restricting the supported fastening member to be movable only in one direction is formed in the one direction. A first step of attaching a second cab mount provided along the linear direction passing through the first location and the second location away from the first location to the second location; and the cab of the movement and a second step for fixing the said first portion and said frame, after said second step, the fastening member is regulated by the cover member, to be tightened in the long hole A third step of fixing the said second portion and the frame of the cab from, after the third step, the position different from the first location and the second location of the plurality of locations The fourth step of attaching the fastening member so as to be movable within a predetermined range is performed.
[0009]
According to a second aspect of the present invention, the second location is behind the first location .
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0011]
Figure 1 is a sectional view showing a cab mounting structure for applying a cab mounting method according to the present invention, FIG. 2 is a schematic plan view of a cab mounting structure for applying a cab mounting method according to the present invention, FIG. 3 4 is a perspective view and a side view showing a bolt fastening nut in which a nut is supported so as to be movable in the horizontal direction, and FIG. 5 is a diagram showing a nut supported so as to be movable in the longitudinal direction of the vehicle. FIG. 6 is a perspective view showing a cab mount provided with a bolt fastening nut fixed by welding. Note that FIG. 2 shows the left side of the figure as the front of the vehicle.
[0012]
First, the structure of the cab mounting structure to which the cab mounting method according to the present invention is applied will be described.
[0013]
In order to attach the cab 2 to the vehicle frame 1, as shown in FIGS. 1 and 2, the cab 2 is attached via a plurality of cab mounts 3 attached to the cab 2.
[0014]
A plurality of mounting brackets 4 are provided outside the frame 1 assembled in a ladder shape. The mounting bracket 4 is formed with a round hole 5 for penetrating bolts, through which the mount bolt 6 is passed from the lower part, and the mount bolt 6 is provided for tightening the bolt provided to each cab mount 3 respectively. The nuts 7, 8, 8 'are fastened and fixed. The round hole 5 of the mounting bracket 4 is formed with a diameter equivalent to the outer diameter of the mount bolt 6.
[0015]
As shown in FIGS. 3 and 6, the cab mount 3 has a plate 12 fixed to a concave portion of a cab mount main body 11 having a concave cross section.
[0016]
A bolt fastening nut 7 is welded and fixed to a plate 12 in one of the plurality of cab mounts 3 (in the present embodiment, the leftmost frontmost cab mount 3) (see FIG. 6). ).
[0017]
Each of the other cab mounts 3 is provided with floating nuts on the plate 12 as bolt fastening nuts 8 and 8 'for freely determining a fixing position of the mounting bolt 6 extending from the frame 1 side within a predetermined range. Yes.
[0018]
As shown in FIG. 4, the bolt fastening nut 8 includes a nut body 16 in which a rectangular base 15 is formed below the nut 14, and the nut body 16 is fixedly supported so as to be movable in a horizontal direction 360 ° within a predetermined range. And a cover body 17 to be configured.
[0019]
The base 15 is formed with a hole 20 (see FIG. 4B) whose upper end is coaxial with the screw hole 18 of the nut 14 and whose lower part is enlarged in a tapered shape.
[0020]
The cover body 17 is formed so as to surround the nut body 16. A substantially circular bolt through hole 19 larger than the outer diameter of the mount bolt 6 is formed on the lower surface of the cover body 17. A round hole 21 larger than the outer diameter of the nut 14 is formed on the upper surface of the cover body 17, and the nut body 16 is inserted into the cover body 17 so that the nut 14 protrudes upward from the round hole 21. The nut 14 can be moved within a range in which the nut 14 can move in the round hole 21.
[0021]
One of the plurality of bolt tightening nuts 8 (the leftmost rearmost in this embodiment) is a bolt tightening nut 8 'which is a bolt in which the mounting position of the mount bolt 6 is fixed by welding. It is restricted along only one direction (in the present embodiment, the front-rear direction of the vehicle) substantially along the linear direction passing through the tightening nut 7.
[0022]
As shown in FIG. 5, the bolt fastening nut 8 ′ is formed with an oval long hole 22 extending along the front-rear direction of the vehicle on the upper surface of the cover body 17 ′. The nut body 25 of the bolt tightening nut 8 ′ is composed of a nut 26 and a base 15 formed in a columnar shape. The nut 26 has a diameter equivalent to the short diameter of the long hole 22. As a result, the movement of the nut body 25 is allowed only in the long diameter direction of the long hole 22.
[0023]
In addition, about another structure, since it is equivalent to the nut 8 for bolt fastening of FIG. 4, the same code | symbol is attached | subjected and description is abbreviate | omitted.
[0024]
A rubber cushioning material 24 having a hole 23 through which a bolt passes is provided between the cab mount 3 and the mounting bracket 4 and below the mounting bracket 4. It is designed to absorb shocks.
[0025]
Next, a cab mounting method according to the present invention will be described.
[0026]
When attaching the cab 2 to the frame 1, first, a plurality of cab mounts 3 are attached to the cab 2, and the cab mount 3 is provided with a bolt fastening nut 7 that is fixed to the forefront of the left side of the vehicle and is fixed by welding. The mounting bolt 6 is inserted into and fixed.
[0027]
At this time, the cab mount 3 including the bolt tightening nut 7 is attached to the cab 2 with high attachment position accuracy.
[0028]
Next, the mount bolt 6 is inserted and fixed to the cab mount 3 that is fixed to the rearmost left side and includes a bolt fastening nut 8 ′ having a long hole 22.
[0029]
At this time, in the front cab mount 3, the mount bolt 6 is tightened by the bolt tightening nut 7, so the position thereof is determined. On the other hand, in the rear cab mount 3, the elongated hole 22 of the bolt fastening nut 8 ′ is formed to extend in the front-rear direction, so the cab 2 tries to rotate around the bolt fastening nut 7. The cab 2 can be accurately positioned. At this time, even if the cab mount 3 is attached to the cab 2 so as to be displaced in the longitudinal direction of the vehicle, the attachment error (variation) can be absorbed.
[0030]
However, if the rear cab mount 3 is attached to the cab 2 so as to be shifted in the width direction of the vehicle, the mounting position of the cab 2 is shifted (the cab 2 is tightened from the normal position with the bolt tightening nut 7). Therefore, it is necessary to increase the mounting accuracy of the cab mount 3 in the vehicle width direction. However, the mounting accuracy in the vehicle width direction can be ensured relatively easily because the distance between the vehicle width direction end of the cab 2 and the end of the cab mount 3 is short.
[0031]
Thereafter, the mount bolts 6 are respectively inserted from below the respective mounting brackets 4 of the frame 1 and tightened with the bolt tightening nuts 8 to attach the respective cab mounts 3 and the frame 1, whereby the cab 2 is attached to the frame 1. To fix.
[0032]
At this time, since the mount bolt 6 is tightened with the bolt tightening nut 8, each nut body 16 moves and the cab mount is within the movable range of the nut body 16 of the bolt tightening nut 8. 3 can be absorbed and all the mounting bolts 6 can be inserted vertically. As a result, the cab 2 can be securely attached to the frame 1, and the necessary motion performance, durability strength and vibration noise quality can be ensured.
[0033]
In this embodiment, the bolt tightening nut 7 is provided on the left front cab mount 3, and the bolt tightening nut 8 ′ having the long hole 22 is provided on the left rear cab mount 3. Although attached, the attachment position is not limited to this. For example, as shown in FIG. 7, the cab mount 3 provided with the bolt fastening nut 7 fixed by welding and the cab mount 3 provided with the bolt fastening nut 8 ′ having the elongated hole 22 are diagonally connected to each other. You may arrange so that. In this case, the extending direction of the long hole 22 is a direction along the diagonal line (a direction substantially along a linear direction passing through the bolt fastening nut 7).
[0034]
Further, the mounting positions of the cab mounts 3 provided with the bolt tightening nuts 7 and 8 'are not limited to the frontmost and rearmost cab mounts.
[0035]
In this embodiment, the long hole 22 is formed to extend in the front-rear direction of the vehicle. However, if the cab 2 does not rotate around the bolt fastening nut 7, The extending direction may be slightly deviated from the above-described front-rear direction.
[0036]
【Effect of the invention】
In short, according to the present invention, the excellent effect that the cab can be accurately positioned with respect to the frame of the vehicle is exhibited .
[Brief description of the drawings]
1 is a cross-sectional view of a cab mounting structure for applying a cab mounting method according to the present invention.
It is a schematic plan view of a cab mounting structure for applying a cab mounting method according to the invention; FIG.
FIG. 3 is a perspective view showing a cab mount.
FIGS. 4A and 4B are a perspective view and a side view showing a bolt tightening nut in which the nut is supported so as to be movable in the horizontal direction. FIGS.
FIG. 5 is a perspective view showing a bolt tightening nut in which the nut is supported so as to be movable in the front-rear direction of the vehicle.
FIG. 6 is a perspective view showing a cab mount provided with a bolt fastening nut fixed by welding.
7 is a schematic plan view showing another cab mounting structure for applying a cab mounting method according to the present invention.
[Explanation of symbols]
1 Frame 2 Cab 3 Cab mount 6 Mount bolt 7, 8, 8 'Bolt tightening nut

Claims (2)

A method of attaching a vehicle frame and a cab at a plurality of locations by fastening members provided on a plurality of cab mounts ,
A first cab mount having a fastening member fixed among the plurality of cab mounts is attached to the first place among the plurality of places, and an elongated hole is formed to restrict the supported fastening member to be movable in only one direction. A second cab mount provided so that the cover body extends along the linear direction passing through the first location and the second location away from the first location in the one direction. A first step of attaching to the
A second step of fixing the first portion of the cab and the frame;
After said second step, a third step of fixing the said second portion and the frame of the cab from the fastening member is regulated by the cover member, is movable in the long hole fastening,
After the third step, a fourth step of attaching the fastening member to a place different from the first place and the second place among the plurality of places so as to be freely movable within a predetermined range. A cab mounting method characterized by being performed. The cab mounting method according to claim 1, wherein the second location is behind the first location .

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