JPH0328077A - Installing method for rear wheel steering device of car - Google Patents

Abstract

PURPOSE:To provide possibility of easy and precise setting and enhance the easiness in assembly work by fitting a cam fixing bolt from an already existing hole in the housing, putting the tip in contact with a specified place of a cam plate, and locking the cam plate in a specified rotational position. CONSTITUTION:The dimensions, installing position, etc., of a follower shaft 37, cam member 40, etc., are set about the direction fore and aft. A set bolt 63 longer than a drain plug 62 is inserted from a drain hole 61 provided in the lower part of a front housing 32 and driven until the tip comes in contact with the junction 43p of a left and a right No.3 cam surface of the cam member 40. As this junction 43p is located right under the cam center 40c in the neutral condition of the cam member 40, fitting of this set bolt 63 makes it practicable to set the cam member 40 in the neutral position of steering and also maintain this set condition.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The third invention relates to a method for assembling a rear wheel steering device of a vehicle equipped with a cam type rear wheel steering mechanism.

[Journey's technology] Conventionally, so-called cam-type rear wheels have been used as rear wheel steering devices for vehicles such as automobiles, in which the rear wheels are steered by the action of a cam plate that rotates in response to the steering of the front wheels. Those equipped with a steering mechanism are generally well known.
In Publication No. 97468, a cam plate is attached to the input shaft of a rear wheel steering mechanism, and left and right driven levers for steering the rear wheels are brought into contact with the outer periphery of the cam plate, so that the human power shaft is linked to the steering wheel. A driven joint lever is actuated along the outer circumferential shape of the cam plate by rotating the cam plate, thereby steering the rear wheels in a direction opposite to the steering direction of the front wheels.

In the above-mentioned cam-type rear wheel steering device, the steering characteristics of the rear wheels (i.e., the cam The outer circumferential shape of the plate) is set, and in a four-wheel steering vehicle equipped with such a rear wheel steering device, when entering the garage or making a U-turn, etc.
Significantly improves the vehicle's ability to turn in a tight corner when turning with a small turning radius, that is, when turning the steering wheel significantly at low vehicle speeds.

By the way, when assembling the rear wheel steering device to the vehicle body, the initial setting is to set the front and rear wheel steering devices to neutral so that when the front wheels are in the neutral steering position with a steering angle of 0, the rear wheels are also maintained in the neutral steering state. It is necessary to set the positions so that they match.

In other words, in the case of the above cam type rear wheel steering device, the phase of the rotational direction of the cam plate is increased to a phase where the rear wheels are maintained in a neutral steering state, and this initial phase state is maintained! While doing so, assemble the rear wheel steering system to the vehicle body with the rear wheel alignment set to the straight-ahead direction, and then
This rear wheel steering device is connected to the front wheels maintained in a neutral steering state.

Conventionally, when adjusting the phase of the cam plate during initial settings, reference marks for initial phase adjustment are provided in advance on the housing side that houses the rear wheel steering mechanism and on the cam plate side, respectively, and these reference marks are compared to each other. By aligning the cam plates and assembling the cam plate into the housing, the initial phase of the cam plate is set to the neutral steering state, and furthermore, a bolt member etc. is inserted from the outside of the housing to control the rotation of the input shaft that drives the cam plate. By temporarily locking, during assembly to the vehicle body,
The rotational phase of the cam plate is maintained so as not to deviate from the initial phase.

[Problems to be Solved by the Invention] However, in the above conventional method, the cam plate is assembled into the housing while visually aligning the reference marks in order to adjust the initial phase of the cam plate. ,
Since the input shaft is locked in a separate process from this initial phase adjustment work, there is a problem in that it takes time and effort to initialize the rear wheel steering device to the neutral steering state. Further, a dedicated screw hole was provided in the housing for inserting the bolt member for the manual shaft lock from the outside, and a dedicated closing member was also required to close the screw hole after the assembly work was completed.

By the way, in the above-mentioned cam-type rear wheel steering device, a gear mechanism is usually provided in the device to drive the cam plate at a predetermined reduction ratio with respect to the input shaft, and lubrication for this gear mechanism is as follows. Depending on the usage conditions of the rear wheel steering system, oil lubrication is applied when grease lubrication is insufficient. This oil lubrication generally involves storing lubricating oil up to a predetermined level in the housing and supplying it to the gear mechanism's meshing mechanism.Normally, the lower part of the housing is used to store lubricating oil up to a predetermined level in the housing, and there is a lubricant at the bottom of the housing that is used during maintenance such as inspecting and repairing the inside of the device or replacing the lubricating oil. An oil discharge hole (drain hole) is provided for discharging lubricating oil to the outside of the housing, and this drain hole is normally closed by screwing in a drain plug.

This invention was made to improve the workability of assembling a cam-type rear wheel steering device. An object of the present invention is to provide a method for assembling a rear wheel steering device for a vehicle, which allows simultaneous initial phase setting and locking of a cam plate.

[Means for Solving the Problem] Therefore, the present invention provides a rear wheel steering mechanism including a cam plate that rotates in response to steering of the front wheels, and a hole portion for attaching a bolt member from the outside. In the method for assembling a rear wheel steering device of a vehicle, the rear wheel steering device is installed in a vehicle body, and the rear wheel steering device is housed in the housing. Before assembly, a cam fixing bolt member is installed in the hole, and the tip of the cam fixing bolt member is brought into contact with a predetermined part of the cam plate to fix the cam plate at a predetermined rotational position. After the rear wheel steering device is assembled to the vehicle body, the cam fixing bolt member is replaced with a bolt member shorter than the fixing bolt member.

[Effects of the Invention] According to the present invention, when locking the cam plate, the cam fixing bolt member is installed through the existing hole provided in the housing, and the tip of the cam fixing bolt member is inserted into the predetermined position of the cam plate. Since the cam plate is locked in a predetermined rotational position by contacting the cam plate with the cam plate, the cam plate should be set at the position where the cam fixing bolt member makes contact with the cam plate at a position where the cam plate is in a neutral steering state. Accordingly, the initial phase setting and locking of the cam plate can be performed simultaneously. As a result, the initial phase is set by visually aligning the reference marks, and the input shaft is locked in a separate process from this setting process, which makes setting easier and more accurate. Assembling workability of the wheel steering device can be improved.

In addition, since the cam fixing bolt member is installed using an existing hole provided in the housing, such as the above-mentioned drain hole, a dedicated hole for locking the input shaft (that is, the cam plate) The manufacturing cost of the housing can be reduced compared to the conventional case where a hole and a dedicated closing member are provided.

[Example] Hereinafter, an example of the present invention will be described in detail based on the accompanying drawings.

FIG. 10 is a plan view schematically showing the overall structure of the steering mechanism of the automobile according to this embodiment. The front wheel steering device 1O that steers the left and right front wheels 2 includes a steering shaft 12 that is rotatably supported on the vehicle body, and a first steering wheel that is fixed to the rear end of the steering shaft 12 and that is rotatably operated. It is extended so that it can be moved back and forth in the width direction of the vehicle.
A front wheel steering rod l5 is connected to the front wheels 2.2 via left and right tie rods 5 and knuckle arms 4, and the front wheel steering rod l5 is connected to the steering shaft I2.
A rack 16 that meshes with a binion l3 fixed to the front end of the
(main rack) is provided.

Then, steer the steering wheel 11 (rotation operation)
Then, the pinion l3 is rotated via the steering shaft 12, and the rotation of the pinion l3 moves the front wheel steering rod l5 in the vehicle width direction via the rack 16, and this movement causes the left and right tie rods 5 to move. The front wheels 2.2 are steered via the knuckle arms 4 and the knuckle arms 4.

Further, the front wheel steering rod l5 is provided with the main rack l6.
A sub-rack l8 is integrally provided, which is disposed parallel to the main rack 16' and has teeth formed in an opposite direction to the main rack 16'.
A binion 2l fixed to a connecting rod 20a connected to the front end of an intermediate shaft 20 extending in the front-rear direction along the lower surface of the vehicle floor 7 is engaged with the sub-rack l8.

When the front wheel steering lever 5 is moved in the vehicle width direction by steering the steering wheel l1, the auxiliary rack l8 is also moved in the same direction, and the intermediate sleeve is moved through the pinion 2l and the connecting rod 20a. 20 can be rotated in a direction opposite to the rotation direction of the steering wheel 11.

Although not specifically illustrated, the steering force of the steering wheel IT is power assisted by, for example, a hydraulic power steering mechanism.

The rear end of the intermediate shaft 20 is connected to the rear end of the intermediate shaft 20 via a coupling l9.
The wheel support 23 is connected to a rear wheel steering device 30 that steers the left and right rear wheels 22 supported by the vehicle body, respectively.As will be explained in detail later, the rear wheel steering device 30 controls the rotation of the intermediate shaft 20. The dynamic movement is converted into a movement movement of the rear wheel tie rod 2 5.2 5 in the vehicle width direction, and this movement causes the rear wheel 2 2.2 2 to be steered via the left and right wheel supports 23. There is. Incidentally, brackets 23a are fixed to the rear end portions of the wheel supports 2 3, 2 3, respectively, and the rear wheel tie rods 2
5 is rotatably connected to the bracket 23a via a pivot pin 24. Further, the rear wheel steering device 30 is arranged above and slightly diagonally rearward of the operating gear device 27 and the left and right axle canings 28, which are installed between the left and right rear wheels 2.

The internal structure of the rear wheel steering device 30 will be described below.

As shown in FIGS. 1 and 3, the rear wheel steering device 30 according to the present embodiment includes a hollow housing 31 extending in the vehicle width direction and accommodating the structural parts of the device 30, and Axis 2
Rear wheel steering system with 0 rotation movement! ! Input shaft 35 that transmits to 30
A drive gear 36 fixed to the rear end, a driven shaft 37 arranged parallel to the rotational axis of the input shaft 35 and rotatably supported by the housing 31 at both front and rear ends, and the driven shaft 3
A driven gear 38 is fixed coaxially to the front end of the drive shaft 37 and meshes with the driving gear 36, and a plate-shaped cam member 40 is integrally fixed in the middle of the driven shaft 37, and both ends thereof are connected to the left and right sides from the housing 3l, respectively. It is provided with one rear wheel steering rod 46 (output shaft) extending in the vehicle width direction so as to protrude outward, and both ends of the output shaft 46 are connected to universal joints 47, respectively.
It is connected to the left and right tie rods 25 via. still,
The connecting portion between the output shaft 46 and the tie rod 25 is covered with a bellows-shaped rubber member 26 for dustproofing.

The housing 3l has a dividing surface 3 as shown in FIG.
It is composed of a front housing 32 and a rear housing 33, which are divided into front and rear parts at 1a.
2.3 is bolted up with a large number of flanges 32r and 33r provided on its outer periphery. The driven shaft 37 has a front end supported in a shaft hole of the front housing 32 via a radial bearing 47, and a rear end supported in a shaft hole of the rear housing 33 via a radial bearing 48. The front end of the driven shaft 37 extends forward from a cap-shaped protrusion 32c of the front housing 32, and thrust bearings 51 and 52 are mounted on the inside and outside of the protrusion 32c, respectively. The thrust bearings 5l and 52 receive the axial load acting on the driven shaft 37 and prevent it from moving in the axial direction.

Further, as shown in detail in FIG. 2, an annular groove 35a is formed on the outer periphery of the input shaft 35, which is rotatably supported by the boss portion 32b of the front housing 32. A pin member 34 inserted from the outside is engaged with the pin member 34, and the input shaft 35 is prevented from moving in the axial direction.

The output shaft 46 is composed of left and right connecting rods 46Q46r connected to the tie rods 25, 25, respectively, and a plate-shaped central connecting rod 46c that integrally connects the inner ends of these two parts. The cam member 40 is housed in a space formed between the inner ends of the connecting rod parts 4612 and 46r on both the left and right sides of the output shaft 46 (that is, on the front side of the central connecting part 46c), and the cam member 40 is housed in a space formed between the inner ends of the connecting rod parts 4612 and 46r on both the left and right sides of the output shaft 46 (that is, on the front side of the central connecting part 46c). Part 4
At the inner ends of fl and 46r, a pair of left and right roller members 54 are provided which roll into contact with the outer circumferential surface (cam surface 40') of the cam member 40.
Q154r is rotatably attached.

Note that FIG. 3 above is a longitudinal section of the rear wheel steering device 30 viewed from the front side of the vehicle body, so FIG.
The left and right sides are displayed in the opposite direction compared to Figure 0.

Either one of the roller members 54&, 54r (for example, the left roller retainer 54Q) is fitted with a pair of front and rear rubber to prevent a gap from forming between the cam surface 40r and the surface of the roller members 54&, 54r. It is attached to the output shaft 46 via a pusher 55. That is, as shown in detail in FIG. 5, the left roller member 54Q has a sleeve 57 pressed onto the pivot shaft 56 and
The sleeve 5 is attached to the pivot shaft 56 via a bearing metal 58 fitted externally to the pivot shaft 56, and the sleeve 5 is attached to both front and rear ends of the pivot shaft 56.
Collars 5, 9, 5, and 9 that regulate the front and rear positions of the shafts 7 are mounted on the outside, and an annular rubber pusher 55 is installed between each collar 59 and the output shaft 4B. As shown in FIG. 6, the rubber push 55 includes a hard rubber body 55c which is compressed by applying a preload between a thin cylindrical metal inner tube 55a and an outer tube 55b which are arranged coaxially. The roller member 54Q is connected from the rear wheel 22 via the tie rod 25 and output shaft 46.
．． It is set to be able to withstand the load in the vehicle width direction that acts on 54r.

In this embodiment, since the rubber bushing 355.55 is provided only on one of the roller members 54Q, the elastic force of the rubber body 55c loaded with the bridle causes the cam surface 40f to contact the cam surface 40f during rotation of the cam member 40. Laura Rozai 54Q
, 54r, and the horizontal positional relationship between the cam member 40 and the output shaft 46 is determined by the fluctuation of the elastic force of the rubber pusher 55. Since the rear wheel is always held constant via the other roller member 54r, even if the elastic properties of the rubber deteriorate due to long-term use, such as when rubber push is provided on both the left and right sides, the rear wheels in the neutral steering state 2
2.2 There is no negative effect on the alignment of 2.

The cam retainer 40 is formed into a substantially heart shape that is symmetrical about the vertical axis, and the cam surface 40f on its outer periphery is located at the sleeve core of the driven shaft 37 (i.e., the cam center of the cam member 40). 40C), the left and right first cam surface portions 4N2 each having a circumferential surface with a predetermined radius R as the center;
41r (l-th cam surface) and the first cam surface 4112, 41
Starting point JQ, J from one end of r
Left and right second cam surface portions 42i2, 42r (second cam surface portions 42i, 42r) are set so that the distance from the cam center 40c increases as the distance from r increases (that is, the outer shape of the cam member 40 increases). ) and the first
Starting from the other end KQ, Kr of the cam surface 4112.41r, as the distance from the starting point KQ, Kr increases, the cam center 40
The distance from c is the second cam surface 42r facing each other,
Left and right third cam surface portions 4312 and 43r (third cam surfaces) are respectively set to decrease by the amount increased in 42Q (that is, so that the outer shape of the cam member 40 sinks). . The left and right third cam surfaces 43Q, 43r are joined to each other at a joint 43p located directly below the cam center 40c in the neutral steering state shown in FIG.

In this embodiment, the cam member 40 is replaced by the left and right roller members 5.
In order to improve the ease of assembly when assembling between 4Q and 54r, more preferably the second cam surfaces 4212 and 4
2r, a portion that is not actually used as a steering range, that is, the second cam surfaces 42Q.2r on both sides. There is a flat cutout near the part where 42r is joined.

Therefore, the length of the diameter passing through the cam center 40c is always constant (2R) regardless of the rotational state of the cam member 40 within the steering range, and is shorter than 2R outside the steering range. It is set.

The first cam surfaces 41ff and 41r correspond to the range in which the steering wheel 11 is rotated by a predetermined angle (for example, 200 degrees) left and right from the neutral position (i.e., the position where the vehicle travels straight with a steering angle of 0). When the steering wheel 11 is in the neutral position, the left and right roller retainers 54L54r are set to roll into contact with the center portions of the first cam surfaces 41Q and 41r.

Further, a driven shaft 37 is attached to the central shaft 46c of the output shaft 46.
An elongated hole 46d extending in the vehicle width direction is provided through which the rear end portion is inserted (see FIGS. 1 and 3).
The rotation of the cam member 40 accompanying the rotation of the cam surface 40
Rolling contact position P of roller member 5417.54r on r
, Q changes, the central shaft 46c is guided by the driven shaft 37 and restricted to move along the periphery of the elongated hole 46d, so that the entire output shaft 46 moves in the vehicle width direction. It is supposed to be done.

The operations of the front wheel steering device 10 and the rear wheel steering device 30 configured as described above will be described below.

When the steering wheel II is steered, for example, in the clockwise (clockwise) direction as shown by the solid arrow in FIG.
3 and the main rack 16, and this movement causes the tie rod 5.5 and the knuckle arm 4.
4, the left and right front wheels 2 are rotated in the clockwise direction about the pivot point of the knuckle arm 4.4 (that is, the vehicle is steered in the direction of turning the vehicle to the right).

On the other hand, the intermediate shaft 20 is rotated counterclockwise via the sub rack l8 and the binion 21, and the input shaft 25 for the rear wheel steering device 30 is also rotated in the same direction. Therefore, the driven shaft 37 and the cam member 40 are rotated clockwise via the driving gear 3G and the driven gear 38 (see the solid line arrow in FIG. 7), and the roller members 5412 and 54r on the cam surface 40f are rotated clockwise. The contact positions P and Q change. That is, the rolling contact position P of the left roller member 54Q changes toward the left third cam surface 43l2, and the rolling contact position Q of the right roller member 54r changes toward the right second cam surface 42r. . However, steering wheel II
When the steering angle is within a predetermined value (200 degrees) from the neutral position, the left and right roller retainers 54C, 54r are still in rolling contact with the first cams 41Q, 41r, and are not rolling from the cam center 40c. Since the distance jli (R) to the contact points P and Q is maintained equal on the left and right sides, the output shaft 4
6 is not moved in the vehicle width direction, and the rear wheels 2 2
．． The steering amount of 2 2 is zero.

When the steering wheel 11 is further steered clockwise beyond the predetermined value, the cam member 40 is further rotated to the right in FIG. 5412 is moved rightward along the shape of the cam surface while contacting with the third cam surface 4M on the left, and the roller retainer 54r on the right is moved to the right along the shape of the cam surface while contacting with the second cam surface 42r on the right. It is moved to the right by the same amount as the left roller member 54 (2) along the shape.

In other words, the cam surface 40f and the left and right roller members 5412
, 54r is maintained constant (2R), the entire output shaft 46 is moved to the right. As a result, the left and right rear wheels 22.22 have tie rods 2 5.2
5, the front wheels 2.2 are steered in a left-hand turning direction, contrary to the front wheels 2.2.

As described above, when the steering amount of the steering wheel l1 is smaller than the predetermined value (200 degrees), the rear wheel 22.22
is not steered, but if the amount of steering of the steering wheel 2 is greater than the predetermined value, the rear wheels 2 2
．． 2.2 is steered in a phase opposite to that of the front wheels 2.2. Note that the above explanation was for the case where the vehicle is turned to the right, but even when the vehicle is turned to the left, the operation of each component of the front wheel steering device 10 and the rear wheel steering device 30 is different from left to right. Since the same operation is performed just by reversing the direction, further explanation will be omitted.

Incidentally, in this embodiment, the meshing portion between the driving gear 36 and the driven gear 38 is lubricated by oil lubrication using lubricating oil stored up to a predetermined level in the housing 3I. In order to discharge lubricating oil to the outside of the housing 3l during maintenance such as internal inspection and repair of the rear wheel steering device 30 or lubricating oil replacement, a drain hole 6l is provided with a female thread in the lower part of the housing 3l.
(See Figure 3). The drain hole 61 is
It is provided on the front housing 32 side so as to be located at a portion directly below the cam center 40c of the cam retainer 40 in the assembled state of the rear wheel steering device 30, and the housing 3! The drain plug 62 is screwed on to close the drain plug 62 before lubricating oil is injected into the drain plug. Although not specifically shown, an injection hole for injecting lubricating oil into the housing 3l is provided in the upper part of the housing 3l.

Hereinafter, a method of assembling the rear wheel steering device 30 will be explained.

First, the cam member 4 integrally fixed to the driven shaft 37
0 is incorporated into the output shaft 46. At this time, as shown by the dashed line in FIG. 8, the cam member 40 is moved 90 degrees from the neutral state.
While maintaining the rotated position, the rear end side of the driven M37 is inserted into the elongated hole 46d of the output shaft 46. In this embodiment, as described above, the diameter of the portion of the cam member 40 outside the steering range is the distance between the contact surfaces of the left and right rollers 54L54r.
Since the cam member 4o is set smaller than the cam member 4o, the cam member 4o can be easily inserted between the left and right roller members. Then, the cam member 40 is rotated to bring the cam member 40 into a substantially neutral state.

Next, the driven gear 38, the radial bearings 47 and 48, and the thrust bearing 5l are assembled to the driven shaft 37.
and the output shaft 46, and the drive gear 36
After assembling the subassembly of the input shaft 35 and the input shaft 35 to the front housing 32 and meshing the driving gear 36 and the driven gear 38, the thrust bearing 52 is assembled to the front end of the driven shaft 37. At this time, the cam member 4o is
At least the front half is the housing dividing surface 3! The longitudinal dimensions, mounting positions, etc. of the driven shaft 37, cam member 40, etc. are set so that they are located closer to the front housing 32 than a (see FIG. 4).

Then, as shown in FIG. 9, the front housing 32
A bolt member 63 (set bolt) longer than the drain plug 62 is inserted into the drain hole 6l provided at the lower part of the drain plug 62, and the tip of the set bolt 63 joins the left and right third cam surfaces 43Q and 43r of the cam member 40. Screw the set bolt 63 until it stops against the portion 43p. The above joint part 4
31) is the cam center 4 when the cam member 40 is in the neutral state.
Since the drain hole 6 is located directly below the cam center 40c, the cam member 40 is set to the neutral steering state by installing the set bolt 63, and this set It will be locked to maintain its state. In this case, the cam member 40 is set to the neutral state by placing the tip of the set bolt 63 against the joint portion 431) of the left and right third cam surfaces 43Q, 43r. Compared to the case where the initial phase of the cam member 40 is adjusted by aligning the marks and then the input shaft is locked in a separate process, the setting can be performed more easily and accurately.

Next, the rear housing 3 is attached to the front housing 32.
3, bolt them up to assemble the rear wheel steering device 30, and then assemble this rear wheel steering device 1130 to the vehicle body. That is, with the rear wheel alignment set in the straight-ahead direction with the steering angle O, the rear wheel steering device 30 set in the neutral steering state is assembled between the left and right rear wheels 22, and the front wheels are further connected to the steering wheel 1l. The rear wheel steering device 30 and the front wheel steering device 10 are connected via the intermediate shaft 20 by the coupling 19 while maintaining the neutral state at a rotation angle of 0 (that is, the steering angle O of the front wheels 2.2). .

After completing the above assembly process, the set bolt 63 is unscrewed from the drain hole 6l, and a normal drain plug 62, which is shorter than the set bolt 63, is screwed into the drain hole 6l to close the drain hole 6l. And housing 31
Lubricating oil is injected into the tank to a predetermined level.

As explained above, according to this embodiment, the cam member 4
0, install the set bolt 63 from the existing hole (drain hole 6l) provided in the front housing 32, and insert the tip of the set bolt 63 into the cam center 40c when the cam member 40 is in the neutral state. The cam member 40 is brought into contact with the joint portion 43p located directly below.
Since the cam member 40 is locked in the neutral steering state, the initial phase of the cam member 40 can be set and locked at the same time, and the ease of assembling the rear wheel steering device 30 can be improved.

In addition, the set bolt 63 can be installed in the existing drain hole 6.
Since the drain plug 62 is normally used to close the cam member 40 after assembly, there is no need to provide a dedicated screw hole and a closing member for locking the cam member 40.

[Brief explanation of drawings]

The drawings are for explaining embodiments of the present invention, and FIG. 1 is a cross-sectional explanatory diagram of the rear wheel steering device, and FIG.
A cross-sectional explanatory diagram taken along the line A-A in the figure, and Figure 3 is taken along the line B-B in Figure 1.
4 is an explanatory side view in the C-C direction of FIG. 1, FIG. 5 is an enlarged sectional view of the mounting portion of the left roller member, and FIG. 6 is an explanatory longitudinal sectional view of the rubber pusher. FIG. 7 is a front explanatory view of the cam member and left and right roller members, FIG. 8 is a front explanatory view of the output shaft and the cam member in the assembled state, and FIG.
The figure is a front explanatory view of the cam member locked in the initial phase state by a set bolt within the housing, and FIG. 2... Front wheel, 22... Rear wheel, 30... Rear wheel steering device, 3l... Housing, 32... Front housing, 40... Cam member, 61... Drain hole, 62
...Drain plug, 63...Set bolt.

Claims (1)

[Claims] (1) A rear wheel steering mechanism equipped with a cam plate that rotates in accordance with the steering of the front wheels, and a housing that is provided with a hole for attaching a bolt member from the outside and houses the rear wheel steering mechanism. In the method for assembling a rear wheel steering device of a vehicle, after the rear wheel steering mechanism is housed in the housing, and before assembling the rear wheel steering device to the vehicle body, a cam fixing bolt member is installed in the hole. Then, the tip of the cam fixing bolt member is brought into contact with a predetermined portion of the cam plate to fix the cam plate at a predetermined rotational position, and after the rear wheel steering device is assembled to the vehicle body, the cam plate is fixed. A method for assembling a rear wheel steering system for a vehicle, comprising replacing a fixing bolt member with a bolt member shorter than the fixing bolt member.