JPH0665172U - Vehicle cab suspension system - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a cab suspension device for a vehicle that copes with a cab installation error. A sub-frame 3 is supported by a cab mounting bracket 1 via a coil spring 2, and a cab is supported by the sub-frame 3 via a rubber cushion 7. A cab suspension device for a vehicle receives an upper end of the coil spring 2. The elongated hole 13 is formed so that the mounting position of the rubber cushion 7 on the spring retainer 5 can be adjusted in the front-rear direction of the vehicle.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a vehicle cab suspension device.

[0002]

[Prior art]

 As a conventional cab suspension device for a vehicle, there is, for example, one shown in FIG. 5 (see Japanese Utility Model Laid-Open No. 4-26313).

To explain this, the subframe 3 is supported by the cab mounting bracket 1 via the coil spring 2. A spring retainer 4 that receives the lower end of the coil spring 2 is fixed to the cab mounting bracket 1, and a spring retainer 5 that receives the upper end of the coil spring 2 is fastened to the subframe 3 with a bolt 11 and a nut 12.

A rubber cushion 7 for cab mounting is fixed to the upper surface of the spring retainer 5, and the cab 9 is supported by the rubber cushion 7.

A stop rubber 8 is fixed to the lower surface of the spring retainer 5. The stop rubber 8 prevents the coil spring 2 from contracting further by coming into contact with the spring retainer 4.

[0006]

[Problems to be solved by the device]

 However, in such a conventional vehicle cab suspension device, when a slight manufacturing error occurs in the mounting position of the cab with respect to the cab mounting bracket 1, the cab is supported by the rubber cushion 7, The subframe 3 may be displaced together with the rubber cushion 7, and the coil spring 2 may be distorted, and the coil spring 2 and the subframe 3 may interfere with each other.

The present invention focuses on the above-mentioned problems, and an object thereof is to provide a cab suspension device that copes with a cab installation error.

[0008]

[Means for Solving the Problems]

 The present invention is a cab suspension device for a vehicle in which a subframe is supported by a cab mounting bracket via a coil spring, and the cab is supported by a rubber cushion on the subframe. Provide a means to adjust the mounting position of the cushion in the front-back direction of the vehicle.

[0009]

[Action]

 If there is a manufacturing error in the front-rear direction at the cab mounting position with respect to the cab mounting bracket, adjusting the rubber cushion mounting position with respect to the spring retainer in the front-rear direction of the vehicle avoids distortion of the coil springs. This allows the coil spring to exhibit the desired spring characteristics and prevents the coil spring from interfering with the subframe.

[0010]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, a subframe 3 is supported by a cab mounting bracket 1 via a coil spring 2. A spring retainer 4 that receives the lower end of the coil spring 2 is fixed to the cab mounting bracket 1, and a spring retainer 5 that receives the upper end of the coil spring 2 is fastened to the subframe 3 with a bolt 11 and a nut 12.

A stop rubber 8 is fixed to the lower surface of the spring retainer 5. When the stop rubber 8 contacts the spring retainer 4, the coil spring 2 is restricted from contracting further.

A cushion bracket 6 is joined to the upper surface of the sub-frame 3, and a pair of rubber cushions 7 are fixed to the upper surface of the cushion bracket 6. A cab 9 is supported on the rubber cushion 7 via a lock device 10.

A cushion bracket 6 is fastened to the subframe 3 with bolts 11 and nuts 12.

As a means for adjusting the mounting position of the rubber cushion 7 with respect to the spring retainer in the longitudinal direction of the vehicle, as shown in FIG. 3, the cushion bracket 6 is formed with an elongated hole 13 through which the bolt 11 is passed. The elongated hole 13 is formed in an oval shape extending in the front-rear direction of the vehicle.

Next, the operation will be described.

The cab 9 is elastically supported by the cab mounting bracket 1 via the coil spring 2 and the rubber cushion 7, and the vibrations transmitted from the cab mounting bracket 1 by the elastic deformation of the coil spring 2 and the rubber cushion 7 are prevented. The shock is absorbed.

When the mounting position of the cab 9 with respect to the cab mounting bracket 1 is displaced forward by a manufacturing error A, by adjusting the position where the long hole 13 is engaged with the bolt 11, as shown in FIG. The rubber cushion 7 can be attached to the spring retainer 5 in front of the spring retainer 5 with the manufacturing error A offset. As a result, the coil spring 2 can be prevented from being distorted, the coil spring 2 can exhibit desired spring characteristics, and the coil spring 2 and the sub-frame 3 can be prevented from interfering with each other.

[0019]

As described above, the present invention provides a cab suspension device for a vehicle, in which a subframe is supported by a cab mounting bracket through a coil spring, and a cab is supported by a subframe through a rubber cushion. Since a means for adjusting the mounting position of the rubber cushion with respect to the spring retainer that receives the upper end of the coil spring in the front-rear direction of the vehicle was provided, if there is a manufacturing error in the front-rear direction in the cab mounting position with respect to the cab mounting bracket, By adjusting the mounting position of the rubber cushion to the spring retainer in the front-back direction of the vehicle, it is possible to avoid distortion of the coil spring, and to achieve the desired spring characteristics for the coil spring, and at the same time, to improve the coil spring and subframe. Can be prevented from interfering with each other.

[Brief description of drawings]

FIG. 1 is a lateral cross-sectional view of a main part of a cab suspension device showing an embodiment of the present invention.

FIG. 2 is a transverse cross-sectional view showing the configuration of the cab suspension device.

FIG. 3 is a perspective view of a rubber cushion and the like.

FIG. 4 is a vertical sectional view of the cab suspension device.

FIG. 5 is a lateral cross-sectional view of a main part of a cab suspension device showing a conventional example.

[Explanation of symbols]

 1 Cab Mounting Bracket 2 Coil Spring 3 Sub Frame 4 Spring Retainer 5 Spring Retainer 6 Cushion Bracket 7 Rubber Cushion 9 Cab 11 Bolt 12 Nut 13 Oblong Hole (Adjusting Means)

Claims (1)

[Scope of utility model registration request] 1. In a cab suspension device of a vehicle in which a sub frame is supported by a cab mounting bracket via a coil spring, and a cab is supported by the sub frame via a rubber cushion, a rubber for a spring retainer that receives an upper end of the coil spring. A cab suspension device for a vehicle, comprising means for adjusting a mounting position of the cushion in a front-back direction of the vehicle.