JPH0334975U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view of a rear wheel steering device according to an embodiment of the present invention, Fig. 2 is a cross-sectional plan view of the same device, and Fig. 3 is a cross section taken along the - line in Fig. 1. Figure 4 is a sectional view taken along the - line in Figure 1, Figure 5 is an enlarged sectional view of the neutral biasing mechanism in Figure 1,
6A and 6B are enlarged sectional views of the cushion retainer of FIG. 5, and FIGS. 7A and 7B are
FIGS. 8 and 9 are cross-sectional views showing modified examples of the cushion retainer shown in FIGS. A and 6B, and FIGS. 8 and 9 are cross-sectional views showing modified examples of the neutral biasing mechanism shown in FIG. 5. Explanation of symbols, FS...Front wheel steering system, FW1,
FW2...Front wheel, RW1, RW2...Rear wheel, RS
... Rotating shaft, CM ... Neutral biasing mechanism, 11
...Input shaft, 12a, 12b...Tie rod, 1
3... Operating rod, 16... Housing, 16a
... Cylindrical part, 18 ... Rotating member, 22 ... First support body, 25 ... Pinion, 26 ... Neutral biasing rod, 26b ... Step portion, 31, 32 ... Holder,
33, 34...Cushion retainer, 35, 36
...Spring retainer, 37...Spring,
43, 75...Plate, 46...Second support body,
48... Pin, 71, 72... Annular elastic member, 7
3,74...O ring.

Claims (1)

[Claims for Utility Model Registration] An input shaft that is connected to a front wheel steering device via a rotating shaft and rotates in conjunction with the steering of the front wheels, a rotating member that rotates in conjunction with the input shaft, and a rotating member that rotates in conjunction with the input shaft. A conversion mechanism that converts rotational motion into reciprocating motion; and a conversion rate changing mechanism that is connected to the conversion mechanism and changes the conversion rate of momentum from rotational motion to reciprocating motion in the same mechanism are housed in the housing; A rear wheel steering link mechanism is connected to the output side of the conversion mechanism and is connected to the rear wheels so that the rear wheels can be steered, and the rear wheels are steered in accordance with the reciprocating motion. and a rear wheel steering device for a front and rear wheel steered vehicle capable of changing a steering angle ratio of a rear wheel to a front wheel by controlling a change in the conversion rate, the rear wheel steering device comprising a part of the housing and configured in a rotation tangential direction of the rotating member. a cylindrical storage portion extending to the cylindrical storage portion; and a rack tooth disposed on the outer periphery of the front portion and spaced apart by a predetermined length, the rack teeth being accommodated in the cylindrical storage portion so as to be displaceable in the axial direction and meshing with a pinion formed on the rotating member. a neutral biasing rod having a pair of stopper portions provided on a rear outer periphery of the neutral biasing rod; a pair of retainers whose displacement in the outward direction is restricted by each inner wall of the cylindrical storage portion; and a pair of retainers assembled on the rear outer periphery of the neutral biasing rod and held at both ends in a compressed state. a pair of elastic springs having equal spring characteristics and interposed between each outer end surface of the pair of retainers and each inner wall of the cylindrical storage portion or each stopper portion of the neutral biasing rod; A rear wheel steering device for a front and rear wheel steered vehicle, characterized by comprising a member.