JPH0526761U - Structure of the Cab Suspension - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] To reduce sway of the cab while driving. [Structure] The lateral spring constant of the inner-outer tubular insulator 20 is made larger than the vertical spring constant, and the insulator is oriented to the front side of the cab in the axial direction or the vehicle width direction, and the insulator is oriented to the rear side in the vehicle longitudinal direction. It is arranged as follows.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cab suspension structure.

[0002]

[Prior Art]

 Various such structures have been proposed, and a coil spring is mainly used.

[0003]

[Problems to be solved by the device]

 The conventional structure using a coil spring has a problem that the cab sways back and forth and left and right during traveling, resulting in lack of stability.

The present invention aims to provide a structure of a cab suspension that reduces sway of the cab during traveling.

[0005]

[Means for Solving the Problems]

 According to the present invention, the inner cylinder and the outer cylinder of the inner-outer cylinder type insulator are elastically coupled by the insulator rubber having a lateral spring constant larger than the vertical spring constant, and the inner and outer cylinder type insulator is attached to the front side of the cab with an axis line. It is arranged so as to face the width direction, and the inner and outer cylindrical insulators are arranged on the rear side of the cab so that the axis thereof is oriented in the vehicle front-rear direction.

The inner cylinder of the rear inner-outer cylinder type insulator is formed longer than the outer cylinder, and a floating bracket for locking the cab to the frame side is connected to the outer cylinder, and the inner cylinder is attached to the cab mount bracket in the front-rear direction. It is preferably fixed so as to be locked.

[0007]

[Action]

 In the structure of the cab suspension configured as described above, the force in the vertical direction of the cab is received by the front and rear insulators, and a conventionally well-known riding comfort can be obtained. In addition, the force in the left-right direction is mainly received by the rear insulator, and the force in the front-rear direction is mainly received by the front insulator, so that the sway of the cab in the front-rear direction is reduced. Further, the force at the time of a collision is transmitted from the inner cylinder of the rear insulator to the frame via the cab mount bracket, and the safety at the time of a collision is improved.

[0008]

【Example】

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

In FIGS. 1 to 3, tilt hinge brackets 3 and 3 are erected on both front end portions of the frame 1 so as to face each other. The left end portion of the torsion bar 4 is projected outward and fixed to the arm anchor 5 via serration, and the arm anchor 5 is bolted to the tilt hinge bracket 3. The right end of the torsion bar 4 is fixed to the tube 6 on which the cab mount levers 7, 7 are projecting via a serration. The tube 6 is supported by the tilt hinge brackets 3 and 3 via inner and outer tubular insulators 8 and 20. Then, shock absorbers 9, 9 are interposed between the cab mount lever 7 and the frame 1.

On the other hand, the floating brackets 10, 10 for locking the rear portion of the cab (not shown) to the frame 1 side are connected to the outer cylinder 21 of the inner-outer cylinder type insulator 20 by means not shown. The inner cylinder 22 of the insulator 20 is axially locked and fixed to a cab mount bracket 11 standing on the side surface of the frame 1 by a mounting bolt 12 in the front-rear direction. An arm 13 extending inward from the outer cylinder 21 is provided so as to project. The upper end of a shock absorber 14 arranged vertically is connected to the inner end of the arm 13, and the lower end of the shock absorber 14 is connected to the cab mount bracket 11.

4 and 5, the inner cylinder 22 of the inner-outer cylinder type insulator 20 is formed to be longer than the outer cylinder 21, and a rubber bush 23 is fixed between the outer cylinder 21 and the inner cylinder 22. There is. Horizontally long voids 24 and 25 are formed in the upper and lower portions of the rubber bush 23, respectively. Further, the rubber bush 23 is formed with rebound stopper rubbers 23a and 23b projecting up and down in the center of the space 24. Therefore, the lateral spring constant of the inner-outer tubular insulator 20 is formed to be larger than the vertical spring constant. Further, the front-side inner / outer cylinder type insulator 8 is configured substantially similarly to the rear-side inner / outer cylinder type insulator 20.

Next, the operation will be described. The vertical vibration of the cab during traveling is received by the front and rear insulators 8 and 20 having a small vertical spring constant, and the conventional center of gravity can be obtained. Further, the force in the left-right direction is mainly received by the rear insulator 20 having a large spring constant in the lateral direction, that is, the vehicle width direction, and the force in the front-rear direction is the front side having a large spring constant in the lateral direction, that is, the vehicle front-rear direction. It is mainly received by the insulator 8 of the vehicle, and therefore the swaying of the cab in the front, rear, left and right directions is reduced. Further, the force at the time of a collision is transmitted from the inner cylinder 22 of the insulator 20 on the rear side to the frame 1 via the cab mount bracket 11, and the safety at the time of a collision is improved.

[0013]

[Effect of the device]

 Since the present invention is configured as described above, it is possible to reduce the sway of the cab during traveling, improve the stability, and improve the safety during a collision.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a front sectional view showing details of a front portion of FIG.

FIG. 3 is a front view showing details of a rear portion of FIG.

FIG. 4 is a front view of an inner-outer cylinder type insulator.

5 is a side sectional view of FIG.

[Explanation of symbols]

 1 ... Frame 2 ... Cross member 3 ... Tilt hinge bracket 4 ... Torsion bar 5 ... Arm anchor 6 ... Tube 7 ... Cab mount lever 8, 20 ... Inner / outer cylinder Type insulator 9, 14 ... Shock absorber 10 ... Floating bracket 11 ... Cab mount bracket 12 ... Mounting bolt 13 ... Arm

Claims (1)

[Scope of utility model registration request] 1. An inner cylinder and an outer cylinder of an inner-outer cylinder type insulator are elastically coupled by an insulator rubber having a lateral spring constant larger than a vertical spring constant, and the inner-outer cylinder type insulator has an axis line on the front side of the cab. A structure of a cab suspension characterized in that the inner and outer cylindrical insulators are disposed so as to face in the vehicle longitudinal direction on the rear side of the cab.