JPH0516568U - Hinge mounting structure for tilt type cab - Google Patents

Abstract

(57) [Summary] [Purpose] The cab mount bracket and the hinge bracket are connected from the side of the vehicle body to improve workability. [Structure] By forming a shaft hole 7a directed in the left-right direction at the lower end portion of the hinge bracket 7, both side pieces 2b of the frame side bracket 2 with the vibration-proof material 4 and the bush 15 assembled in the shaft hole 7a in advance. The taper bolt 12 placed between them and inserted toward the taper hole 15a of the bush 15 can be tightened from the side of the vehicle body with an impact wrench or the like, and the work of attaching the hinge bracket 7 to the frame side bracket 2 becomes extremely simple. .

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a mounting structure for mounting a hinge in a tilt-type cab in which a driver's cab leans forward to a frame on a vehicle body side.

[0002]

[Prior Art]

 In a cab-over type truck, etc., as shown in FIG. 6, since the engine E is located almost directly under the cab C, in order to facilitate maintenance and inspection of the cab C, the cab C It is general to use a tilt type in which the entire body rotates forward around a hinge H at the front.

FIG. 5 shows a conventional hinge mounting structure for such a tilt-type cab (a left-right symmetric type, only the right side in the traveling direction is shown). Side rails (frames) 2 facing in the front-rear direction of the figure are generally U-shaped cab mount brackets, and the downward pieces 2a continuously connected to the inside (left side) thereof are fixed to the side rails 1 with bolts 3. As a result, it is provided so as to be placed on the upper surface of the side rail 1.

Between the both side pieces 2b, 2b of the cab mount bracket 2, a bush 20 and a vibration-proof material (rubber mount) 4 externally fitted to the bush 20 are rotated by a bolt 5 penetrating the both side pieces 2b. It is supported freely.

Reference numeral 6 denotes a cab frame fixed to a lower surface of a floor panel (not shown) of the cab C. The lower end portion of the cab frame has a lower end surface which can be fitted to the upper half of the vibration isolator 4 in a downward direction. A hinge bracket 7 having a semi-cylindrical support is fixed by bolts 8 and 8.

Reference numeral 9 denotes a hinge cap that makes a pair with the hinge bracket 7, and has an upward semi-cylindrical support portion that can be fitted to the lower half portion of the vibration isolator 4.

When the front part of the cab C is attached to the cab mount bracket 2, the cab C is preliminarily fixed to the cab frame 6 and the cab C is hoisted and conveyed by a crane or the like to remove the hinge bracket 7. Place it on the upper surface of the vibration isolator 4 that has been previously attached to the cab mount bracket 2. Then, the hinge cap 9 is fitted to the lower half portion of the vibration isolator 4, and the bolts 10 inserted from the front and rear flange portions 9a are screwed toward the hinge bracket 7. , Rotatably supported.

[0008]

[Problems to be solved by the device]

 In the above-described conventional hinge mounting structure, the bolts 10 for fixing the hinge cap 9 to the hinge bracket 7 are located between the two side pieces 2b of the cab mount bracket 2, and the head of the bolt is attached to the side rail 1. Since it is located directly above, it was not possible to use an automatic tightening machine such as impact lending, which was a factor in reducing work efficiency.

Further, since the bush 20 and the vibration-proof material 4 are assembled in advance to the cab mount bracket 2, the hinge bracket 7 is placed on the cab mount bracket 2, and further fixed by the hinge cap 9, the number of assembly steps in the line is increased. There is also.

The present invention has been made in order to solve the above problems, and the workability and work efficiency are improved by connecting the cab mount bracket and the hinge bracket from the side of the vehicle body. It is an object of the present invention to provide a mounting structure for a hinge part in a tilt-type cab that can be improved.

[0011]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a pair of left and right frame side brackets fixed to lower frames on both sides of the vehicle body facing forward and backward, and a pair of left and right hinge brackets fixed to a lower front end of a cab. Is a hinge mounting structure that is mounted so as to be rotatable in the front-rear direction, and has a shaft hole facing the left-right direction at the lower end of the hinge bracket and a taper facing the left-right direction centered on the shaft hole. The present invention is characterized in that a vibration isolator having a hole is fitted therein, and a taper bolt having both end portions supported by the frame-side bracket is inserted into the taper hole of the vibration isolator in a close contact manner.

In addition, the above-mentioned object is a semi-cylindrical shape formed on the lower half of the hinge bracket in the upper half and the lower half of the vibration-proof material rotatably supported by the frame side bracket. The support part and the hinge cap forming a pair with the support part are fitted together, and the flange parts facing in the vertical direction can be overlapped with each other at opposite ends of the support part and the hinge cap on both sides of the vibration isolator. And the taper bolts are inserted into the left and right taper holes that are centered on the hinge bracket side and are biased downward from the hinge bracket side. It can also be achieved by doing what is done.

[0013]

[Action]

 The lower end of the hinge bracket was drilled in the left-right direction, so that the vibration-damping material was mounted on the frame-side bracket in the state of being assembled in the shaft hole in advance, and was inserted toward the taper hole of the vibration-damping material. The taper bolt can be tightened from the side with an impact wrench, etc., and the work of attaching the hinge bracket to the frame side bracket is extremely easy.

Further, even if the centers of the hinge bracket and the frame-side bracket are slightly deviated from each other, their centers are automatically aligned due to the centripetal action when the taper bolt is tightened.

By displacing the center of the tapered hole formed in the bracket on the hinge cap side slightly downward, even though the taper bolt is tightened from the side, the hinge cap has an upward direction orthogonal to the tightening direction. The tightening force of is applied and firmly fixed to the hinge bracket. Therefore, unlike the conventional hinge cap, it is not necessary to tighten the bolt from below, and workability is improved (claim 2).

[0016]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

The same members as those in the conventional example described above are designated by the same reference numerals, and detailed description thereof will be omitted.

FIG. 1 shows a first embodiment of the present invention, in which a large-diameter shaft hole 7a is formed in the lower end portion of the hinge bracket 7 in the left-right direction, and the shaft hole 7a is provided with a protective hole. The vibration material 4 is press-fitted.

A taper bolt 12 composed of a taper shaft 11a and a screw shaft 11b is supported on both side pieces 2b of the hinge bracket 7 in the left-right direction, and is projected to one side (inward). The nuts 14 and 14 are screwed into the projecting end of the through the washer 13 so that the nut 14 is held so as not to rotate.

Reference numeral 15 is a bush that is rotatably fitted to the tapered shaft 11a between the both side pieces 2b, has a tapered hole 15a in the center, and has a straight outer periphery.

When attaching the hinge bracket 7 to the cab mount bracket 2, first, the cab frame 6 integrated with the cab C is fixed to the hinge bracket 7 with bolts 8 in advance, and the vibration isolator 9 has a shaft hole. After inserting the bush 15 into the, the hinge bracket 7 is lowered until its lower end abuts the supporting surface 2c between the side pieces 2b.

Next, the taper bolt 12 is inserted from the outside toward the taper hole 15a of the bush 15, and the nut 14 screwed into the screw shaft 11b through the washer 13 is tightened. It is rotatably supported while slightly floating from 2c.

In the first embodiment, the cab mount bracket 2 is simply assembled by attaching the vibration isolator 9 and the bush 15 to the hinge bracket 7 in advance and simply tightening the taper bolt 12 from the side of the vehicle body. Since it can be mounted on the base, the workability and work efficiency are significantly improved compared to the conventional mounting structure using a hinge cap.

Further, due to the synergistic action of the taper bolt 12 and the taper hole 15a of the bush 15, even when the hinge bracket 7 is placed on the support surface 2c, even if the center position of the hinge bracket 7 is slightly displaced, the centripetal action at the time of fastening the nut 14 causes The centers of the cab mount bracket 2 and the hinge bracket 7 are automatically aligned with each other.

Next, a second embodiment of the present invention will be described with reference to FIGS.

In this embodiment, the shapes of the lower end portion of the hinge bracket 7 and the hinge cap 9 having the same shape as the conventional example are changed so that they can be fixed from the side.

That is, downward flange portions 7b, 7b are continuously provided on the lower left end side of the hinge bracket 7 straddling the vibration isolator 4, and the left end portion of the hinge cap 9 has an upward and downward flange portion 9a, 9a are continuously provided so as to overlap the flange portion 7b, and the flange portions 7b and 9a are fastened together by a taper bolt 16 and a nut 17.

At the time of this tightening, the center of the taper hole 18 formed in the flange portion 7b on the hinge bracket 7 side is adjusted so that the upward tightening force on the hinge bracket 7 side acts on the hinge cap 9. As shown in FIG. 4, when the nut 17 is tightened, relative loads in the directions of the arrows approaching each other act on the taper hole 19 formed in the flange portion 9a on the hinge cap 9 side. I am doing it.

Also in the second embodiment, the hinge bracket 7 can be easily attached to the cab mount bracket 2 from the side of the vehicle body without being hindered by the side rails 1 or the like.

Although the bushes 15 and 20 are molded separately in the first and second embodiments, they are integrally formed on the inner peripheral surface of the vibration isolator 4 in advance by baking or the like. You may keep it fixed.

[0031]

[Effect of the device]

 According to the present invention, the following effects can be obtained. (A) Since the hinge bracket can be attached to the frame side bracket from the side of the vehicle body without being hindered by side rails or the like, workability and work efficiency are significantly improved (claims 1 and 2). (B) Since the vibration isolator and the like can be assembled in advance in the shaft hole formed in the hinge bracket, the number of assembly steps on the line is reduced (claim 1). (C) Since the centers of the hinge bracket and the frame side bracket are automatically aligned by the centripetal action at the time of tightening the taper bolt, the hinge bracket can be easily positioned with respect to the frame side bracket (claim 1).

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing a first embodiment of the present invention.

FIG. 2 is a partially cutaway front view showing a second embodiment of the present invention.

3 is an enlarged left side view of FIG.

FIG. 4 is a front view of an enlarged vertical section taken along the line AA in FIG.

FIG. 5 is a partially cutaway front view of a conventional example.

FIG. 6 is a schematic side view of a front portion of a vehicle including a tilt type cab.

[Explanation of symbols]

1 Side Rail (Frame) 2 Cab Mount Bracket (Frame Side Bracket) 3 Bolt 4 Anti-Vibration Material 5 Bolt 6 Cab Frame 7 Hinge Bracket 7a Shaft Hole 7b Flange Part 8 Bolt 9 Hinge Cap 9a Flange Part 10 Bolt 11a Tapered Shaft 11b Screw Shaft 12 Tapered bolt 13 Washer 14 Nut 15 Bushing 15a Tapered hole 16 Tapered bolt 17 Nut 18,19 Tapered hole 20 Bush C Driver's cab

Claims (2)

[Scope of utility model registration request] 1. A pair of left and right hinge brackets fixed to the lower front end of the cab on a pair of left and right frame side brackets fixed to lower frames on both sides of the vehicle body facing in the front-rear direction.
A hinge part mounting structure that is mounted so as to be rotatable in the front-rear direction of a vehicle body, wherein a shaft hole directed in the left-right direction is formed in a lower end part of the hinge bracket, and a taper directed in the left-right direction is centered in the shaft hole. A hinge portion in a tilt-type cab, characterized in that a vibration-proof material having a hole is fitted therein, and a taper bolt whose both end portions are supported by the frame-side bracket is inserted into the taper hole of the vibration-proof material in a close contact manner. Mounting structure. 2. A pair of left and right frame-side brackets fixed to lower frames on both sides of the vehicle body facing the front-rear direction, and a pair of left-and-right hinge brackets fixed to a lower front end of the cab.
A hinge part mounting structure is mounted so as to be rotatable in a front-rear direction of a vehicle body, wherein the hinge bracket is attached to an upper half part and a lower half part of a vibration isolator rotatably supported by the frame side bracket. A semi-cylindrical support portion formed at the lower end portion and a hinge cap paired with the support portion are fitted to each other, and the support portions and the hinge cap have opposite ends on both sides across the vibration isolator in the vertical direction. Taper holes facing in the left and right direction with the center of the hinge cap side slightly offset downward from the hinge bracket side, which are formed by connecting the flange portions facing each other so that they can overlap each other. A structure for mounting a hinge portion in a tilt-type cab, characterized in that a taper bolt is inserted and fastened to the.