JPH0643380U - Leaf spring suspension shackle - Google Patents

Abstract

(57) [Summary] [Object] The present invention provides a shackle capable of changing a spring constant in a leaf spring suspension according to a load applied to the leaf spring. [Structure] The leaf spring 2 is located from the position of the pin hole 6b of the shackle 5A to which the rear end of the leaf spring 2 is coupled.
Is characterized in that the abutting member 7 having an arcuate surface extending forward and contacting the upper surface of the leaf spring 2 in accordance with the bending of the leaf spring 2 is formed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 TECHNICAL FIELD The present invention relates to a shackle for swingably connecting a rear end of a leaf spring to a frame in a leaf spring suspension.

[0002]

[Prior art]

 As shown in FIG. 5, the leaf spring suspension connects the front end 2a of the leaf spring 2 to a front bracket 3a fixed to the frame 1 with a pin 4, and the rear end 2b of the leaf spring 2 is an H-shaped or Y-shaped shackle. 5, the pins are inserted into the pin holes 6a and 6b, and are connected so as to be swingable in the front-rear direction. In this case, the spring constant of the leaf spring does not change depending on the load.

As a structure in which the spring constant of a leaf spring is changed by a load, a pair of sliding sheets in which the front and rear ends of a sub-spring are in contact with each other is fixedly mounted on a frame, which is disclosed in Japanese Utility Model Publication No. 58-26809. 42222).

[0004]

[Problems to be solved by the device]

 The above Japanese Utility Model Publication No. 58-26809 (Japanese Utility Model Publication No. 54-42222) is effective in a leaf spring suspension having a sub spring, but is suitable in a leaf spring suspension in which a rear end is connected to a frame via a shackle. Cannot be used.

An object of the present invention is to make it possible to change the spring constant of a leaf spring in a leaf spring suspension in which a rear end is connected to a frame via a shackle.

[0006]

Means for Solving the Problems The object of the present invention to achieve the above object is to provide a shackle for swingably connecting a rear end of a leaf spring to a frame, in which a rear end of the leaf spring is coupled. The shackle has a circular arc-shaped contact member that extends toward the front of the leaf spring from the pin hole position and contacts the upper surface of the leaf spring according to the deflection of the leaf spring.

[0007]

[Action]

 With the above configuration, the upper surface of the leaf spring contacts the arc surface of the contact member provided on the shackle according to the deflection of the leaf spring due to the load, and the effective length of the leaf spring is changed to change the spring constant. is there.

[0008]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a frame, 2 is a leaf spring, 3a is a front bracket in which the front end of the leaf spring 2 is connected by a pin 4, 3b is a rear bracket, and both are fixed to the frame 1. Reference numeral 5A is a shackle that swingably connects the rear end of the leaf spring 2 to the rear bracket 3b.

As shown in FIGS. 2 and 3, the shackle 5A is provided with a pin hole 6a for connecting the rear bracket 3b with a pin and a pin hole 6b for connecting the rear end of the leaf spring 2 with a pin. The leaf spring 2 extends toward the front of the leaf spring 2 from the position of the pin hole 6b for connecting the rear end of the leaf spring 2 with a pin, and the upper surface of the leaf spring 2 contacts according to the bending of the leaf spring 2. This is a structure in which an abutting member 7 having an arc surface is formed.

Since the present invention has the above-described structure, as shown in FIG. 4, when the load G is applied to the leaf spring 2 and the load G gradually increases, the shackle 5A is connected to the rear bracket 3b. The pin member 6a is pivoted rearward about the pin hole 6a as a fulcrum, and the contact member 7 falls toward the upper surface of the leaf spring 2 so that the arcuate surface of the contact member 7 contacts the upper surface of the leaf spring 2.

As a result, the contact point of the contact member 7 supports the load G, the supporting span D of the leaf spring 2 is shortened by the contact range E of the contact member 7, and the effective length of the leaf spring 2 is reduced. Is shortened, and the spring constant rises and changes.

Since the contact member 7 is an arc surface, the tilt angle of the contact member 7 changes depending on the load G 1 applied to the leaf spring 2, and the arc surface of the contact member 7 with respect to the upper surface of the leaf spring 2 is changed. The contact point changes. Therefore, the contact area E of the contact member 7 is changed in length depending on the load G applied to the leaf spring 2, and the effective length of the leaf spring 2 is changed according to the load G applied to the leaf spring 2. The numbers change.

[0013]

[Effect of device]

 As described above, according to the present invention, the shackle that swingably connects the rear end of the leaf spring to the frame makes it possible to change the spring constant according to the load applied to the leaf spring.

[Brief description of drawings]

FIG. 1 is a side view of a leaf spring suspension using the shackle of the present invention.

FIG. 2 is an enlarged side view of the shackle of the present invention.

FIG. 3 is a perspective view of FIG.

FIG. 4 is an explanatory view of the operation of the present invention.

FIG. 5 is a side view of a conventional leaf spring suspension.

[Explanation of symbols]

 1 frame 2 leaf spring 3a front bracket 3b rear bracket 5 shackle 6a pin hole 6b pin hole 7 contact member

Claims (1)

[Scope of utility model registration request] 1. In a shackle for swingably connecting a rear end of a leaf spring to a frame, the leaf spring extends forward of the leaf spring from a pin hole position of the shackle to which the rear end of the leaf spring is coupled. A shackle for a leaf spring suspension, wherein an abutting member having an arcuate surface with which the upper surface of the leaf spring comes into contact according to the bending of the shackle is formed.