JPH0867270A - Mounting structure for shock absorber of cab suspension - Google Patents

Abstract

PURPOSE: To prevent low suction noise and wearing according to contact between an inner cylinder and a pin and between the inner cylinder and a nut by constituting the inner cylinder of a pair of resin-made collars, forming an annular flame part swollen in an external end part of each resin-made collar, and mounting a cushion member between the flame parts of both the resin-made collars. CONSTITUTION: An inner cylinder 18 is constituted of a pair of resin-made collars 26, 28, to avoid contact between the fellow metals. That is, a pin 14 and a nut 27 are prevented from coming into direct contact with the other metals. Thus even when the resin-made collars 26, 28 are vibrated at running time or the like, since the small resin-made collars 26, 28 of small coefficient of friction are brought into contact with the pin 14, while ensuring essential vibration absorption of a mounting part 16 of a rubber bush 20 of a shock absorber 24, generating a low suction noise and wearing the pin 14 can be prevented. Further, since each resin-made collar 26, 28 is slidably mounted on the pin 14, even when a cab is tilted, the pin 14 can be smoothly rotated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a shock absorber mounting structure for a cab suspension.

[0002]

2. Description of the Related Art A cab such as a tilt cab type cab overtrack is conventionally used in a torsion bar 10 shown in FIGS.
It is possible to rotate and tilt around the axis. Then, the pin 1 is fixed to the bracket 12 that supports the cab (not shown), the inner cylinder 3 is attached to the mounting portion 2 of the pin 1,
The outer cylinder 5 is mounted on the outer surface of the inner cylinder 3 via a cushion member such as a rubber bush, and the other end of the shock absorber 6 fixed to the frame A is connected to the outer cylinder 5 so that the shock absorber 6 It absorbs shock to improve riding comfort. In addition, B is a bearing and C is a collar.

By the way, according to the shock absorber mounting structure of this cab suspension, as shown in FIG. 5, the inner cylinder 3 is attached to the mounting portion 2 of the pin 1 fixed to the bracket 12 for supporting the cab. An outer cylinder 5 is attached to the outer surface of the cylinder 3 via a rubber bush 4, and the outer cylinder 5 is connected to one end of a shock absorber 6.

However, in such a shock absorber mounting structure, a gap is provided between the inner cylinder 3 and the side surface of the pin 1 and between the inner cylinder 3 and the nut 7 so that the cab can be smoothly rotated and tilted during the cavitating. a is formed.

[0005]

However, when the gap a is formed between the inner cylinder 3 and the side surface of the pin 1 and between the inner cylinder 3 and the nut 7 as described above, the inner cylinder 3 and the pin 1 and the nut 7 during traveling.
There is a fear that a low-grade sound (abnormal noise) is generated due to the contact between the metal and the metal, and the low-grade sound is transmitted to the inside of the cab to give a driver discomfort. In addition, abrasion is caused due to aging and lacks durability.

An object of the present invention is to provide a shock absorber mounting structure for a cab suspension which can prevent generation of low-grade noise and wear due to contact between the inner cylinder and the pins and nuts.

[0007]

According to a first aspect of the invention for achieving the above object, a pin is fixed to a bracket for supporting a cab, and an inner cylinder is attached to a mounting portion of the pin. In the shock absorber mounting structure of the cab suspension, the outer cylinder is mounted on the outer surface via a cushion member, the outer cylinder is connected to one end of the shock absorber, and the inner cylinder is held by the fastening member on the mounting portion of the pin. The inner cylinder is composed of a pair of resin collars, an annular collar portion is bulged at the outer end of each resin collar, and the cushion member is mounted between the collar portions of both resin collars. Is a shock absorber mounting structure for the cab suspension.

According to a second aspect of the present invention, a washer is mounted between the collar portion of each of the resin collars and the cushion member, and a shock absorber for a cab suspension according to the first aspect is attached. It is a structure.

According to the third aspect of the present invention, the pin is fixed to the bracket for supporting the cab, the inner cylinder is mounted on the mounting portion of the pin, and the outer cylinder is mounted on the outer surface of the inner cylinder via the cushion member. In a shock absorber mounting structure of a cab suspension in which an outer cylinder is connected to one end of a shock absorber, and an inner cylinder is held by a fastening member on a mounting portion of a pin, the inner cylinder is made of a tubular resin collar. A shock absorber mounting structure for a cab suspension characterized in that resin washers are mounted on both ends of the tubular resin collar, and the cushion member is mounted between the resin washers on the outer surface of the resin collar. Is.

[0010]

According to the invention of claim 1, since each resin collar is slidably mounted on the mounting portion of the pin and the cushion member is mounted between both resin collars, the elastic cushion member The reaction force eliminates the gap between the resin collar and the side surface of the pin and between the resin collar and the nut. Since there is no gap between the resin collar and the side surface of the pin and between the resin collar and the nut, the resin collar does not move to the left or right while traveling, and the inner cylinder is made of the resin collar. , Metal contact is avoided, and low-grade sound is eliminated.

Further, since the resin collar having a small coefficient of friction is brought into contact with the metal pin and the nut, the occurrence of wear due to aging is small. According to the invention of claim 2, since the washer is provided between the collar portion of the resin collar and the cushion member, the cushion member is reliably supported and stabilized.

According to the third aspect of the present invention, the inner cylinder is made of a single resin collar, and resin washers are attached to both ends of the resin collar. Since the pin contacts the resin collar and the resin washer having a small coefficient of friction, and the nut and the resin washer respectively contact with each other, there is no movement of the resin collar and the resin washer in the same manner as in the invention of claim 1, and when traveling or the like. The generation of low-grade sound is avoided, and the occurrence of wear due to aging is reduced.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.
FIG. 1 shows an essential part of an embodiment of a mounting structure for a shock absorber of a cab suspension according to the invention of claims 1 and 2. The overall configuration of the cab suspension is as shown in FIGS. 3 and 4 described above.

As described above, also in this embodiment, the pin 1
The mounting portion 16 is formed on the tip side of the mounting portion 1.
An inner cylinder 18 is slidably attached to the unit 6. This inner cylinder 1
Rubber bush 2 as a cushion member on the outer surface of 8
0 is installed. An outer cylinder 22 is attached to the outer peripheral side of the rubber bush 20, and one end of the outer cylinder 22 is connected to one end of a shock absorber 24. And pin 1
The inner cylinder 18 is held by tightening a nut (fastening member) 27 that is inserted into the mounting portion 16 of the shock absorber 2 of FIG.
4 is attached.

The inner cylinder 18 is a pair of resin collars 2.
6 and 28, each resin collar 26, 2
At the outer end portion of 8, annular collar portions 30 and 32 are formed so as to swell. The collars 30 and 32 of the resin collars 26 and 28 are divided into both ends of the mounting portion 16, and a gap 34 is formed between the resin collars 26 and 28 by the reaction force of the elastic rubber bush 20. It is mounted on the pin 14 in this state so that there is no gap between the resin collar 28 and the side surface of the pin 14 and between the resin collar 26 and the nut 27. Further, each collar portion 30, 32 and the rubber bush 2
The washers 36 and 38 are mounted between the two and 0, and the support of the rubber bush 20 is ensured.

As described above, in this embodiment, the inner cylinder 1
8 is composed of a pair of resin collars 26, 28 to avoid contact between metal members. That is, the pin 14 and the nut 27 are prevented from coming into direct contact with other metals. For this reason,
Even if the resin collars 26, 28 vibrate during traveling, the resin collars 26, 28 having a small friction coefficient come into contact with the pin 14, so that the original vibration absorption of the mounting portion 16 of the rubber bush 20 of the shock absorber 24 is absorbed. It is possible to prevent generation of low-grade sound and wear of the pin 14 while ensuring the above. Further, since the resin collars 26 and 28 are slidably attached to the pin 14, the pin 14 can be smoothly rotated even during cavitating.

Further, in the above embodiment, the washer 3
I mentioned the one with 6 and 38, but washer 3
Even if 6, 38 are omitted, substantially the same effect can be obtained. FIG. 2 shows an embodiment of the invention of claim 3.

In this embodiment, the inner cylinder 18 is composed of a cylindrical resin collar 40, and resin washers 42 and 44 are attached to both end sides of the resin collar 40.
A rubber bushing 20 is mounted between Nos. 2 and 44, and the inner cylinder 18 is held by the pin 14 with the nut 27. Since the other structure is the same as that of the above-mentioned embodiment, The same reference numerals are given and their description is omitted.

Also in this embodiment, since the inner cylinder 18 that contacts the nut 27 and the pin 14 and the resin washers 42 and 44 are made of a resin material so as to avoid the contact between metal members, the inner cylinder 18 is not likely to come into contact when traveling. Even if the cylinder 18 vibrates, it is possible to prevent the low-grade sound from being generated and the pin 14 to be worn. The pin 14 is a resin collar 4 having a small friction coefficient.
0, the nut 27 is in contact with the resin washer 44, and the nut 27 is in contact with the resin washer 42. Therefore, wear is reduced during the cavitating, and the nut 27 can be smoothly tilted.

[0020]

As described above, according to the inventions of claims 1 to 3, the low-grade sound due to the contact between the metals during traveling or the like is avoided, and the low-grade sound is not transmitted to the cab, so that it is transmitted to the driver. Discomfort is eliminated. In addition, wear of the mounting portion of the shock absorber is prevented from occurring, and durability is increased.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of an embodiment of the invention of claims 1 and 2.

FIG. 2 is a sectional view of an essential part of an embodiment of the invention of claim 3;

FIG. 3 is a rear view of a conventional shock absorber mounting structure for a cab suspension.

FIG. 4 is an exploded perspective view of one side of a shock absorber mounting structure of the cab suspension of FIG. 3;

FIG. 5 is a sectional view of an essential part of a conventional shock absorber mounting structure for a cab suspension.

[Explanation of symbols]

 12 bracket 14 pin 18 inner cylinder 20 rubber bush 22 outer cylinder 24 shock absorber 26, 28 resin collar 27 nut 30, 32 collar portion 36, 38 washer 40 resin collar 42, 44 resin washer

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Masashi Yamaguchi 1 of 827 Futatsumiyamae, Ageo City, Saitama Prefecture

Claims (3)

[Claims] 1. A pin is fixed to a bracket supporting a cab, an inner cylinder is attached to a mounting portion of the pin, an outer cylinder is attached to an outer surface of the inner cylinder via a cushion member, and the outer cylinder is a shock absorber. In the shock absorber mounting structure of the cab suspension, which is connected to one end of the inner cylinder and is held by the fastening member on the mounting portion of the pin, the inner cylinder is composed of a pair of resin collars, A shock absorber mounting structure for a cab suspension, characterized in that an annular collar portion is bulged at an outer end portion, and the cushion member is mounted between the collar portions made of both resin collars. 2. The shock absorber mounting structure for a cab suspension according to claim 1, wherein washers are mounted between the collar portion of each resin collar and the cushion member. 3. A pin is fixed to a bracket for supporting a cab, an inner cylinder is attached to a mounting portion of the pin, an outer cylinder is attached to an outer surface of the inner cylinder via a cushion member, and the outer cylinder is a shock absorber. In the shock absorber mounting structure of the cab suspension, which is connected to one end of the inner cylinder and is held at the mounting portion of the pin by the fastening member, the inner cylinder is made of a cylindrical resin collar. A shock absorber mounting structure for a cab suspension, characterized in that resin washers are mounted on both ends of the resin collar, and the cushion member is mounted between the resin washers on the outer surface of the resin collar.