JP2003127875A - Rack supporting device for rack-and-pinion steering device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that a different spring energizing a rack shaft is required for a different specification of a rack-and-pinion steering device, resulting in a plurality of springs. SOLUTION: In this rack support mechanism 1 for a steering device, a support member 7 supporting the rack shaft 3 can freely slide in a retention hole 30 of a housing 4 and is fixed at an inlet 31 of the retention hole 30 by a fixing member 8, and a compression spring 9 is put between the fixing member 8 and the support member 7. The spring 9 energizes the rack shaft 3 in a pinion shaft side 2 via the support member 7. A spring seat 12 receiving the spring 9, a detent mechanism 14 regulating the rotation of the spring seat 12, and a screw type drive mechanism 13 adjusting a set load of the spring 9 by making the spring seat 12 retreat are provided. The set load can be adjusted by adjusting the compression amount of the spring 9. Consequently, a spring 9 of the same specification can be commonly used between steering devices of different set loads, and the number of types of the springs 9 can be reduced.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a steering device. In particular, the present invention relates to a rack support device of a rack and pinion type steering device (hereinafter, also simply referred to as a steering device).

[0002]

A rack-and-pinion type steering device has a pinion that rotates integrally with a steering wheel and a rack shaft that meshes with the pinion, and these are housed in a housing. The rack support device supports the rack shaft. In the rack supporting device, a support member that supports the rack shaft is arranged on the opposite side of the pinion in the housing with the rack shaft interposed therebetween, and a compression coil spring is arranged behind the support member. A spring presses the rack shaft toward the pinion through a support member with a predetermined set load.

By the way, the set load is different depending on the specifications of the steering device, and accordingly, the compression coil spring is also different. However, as the specifications of the steering device increase, the types of compression coil springs corresponding to the specifications also increase, and it takes time and labor to manage the parts, which increases the cost. Therefore, an object of the present invention is to solve the above-mentioned technical problem, and even if the set loads are different in correspondence with various steering devices, the rack and pinion that requires a small number of types of compression coil springs for this purpose. A rack support device for a steering system is provided.

[0004]

According to a first aspect of the present invention, there is provided a support member which is slidably accommodated in a holding hole of a housing along an axial direction of the holding hole to support a rack shaft. A fixing member screwed into a threaded portion at the inlet of the holding hole to be fixed, and a compression coil spring interposed between the fixing member and the supporting member and biasing the rack shaft toward the pinion shaft side through the supporting member. In a rack support device of a rack and pinion steering device including: a spring seat for receiving the compression coil spring, a means for restricting rotation of the spring seat, and a set load of the compression coil spring for advancing and retracting the spring seat. A rack support device for a rack-and-pinion steering device, comprising: a screw drive mechanism for adjustment.

According to the present invention, since the set load can be adjusted by the screw drive mechanism, the compression coil springs having the same specifications can be shared by a plurality of steering devices having different set loads. Therefore, it is possible to reduce the number of types of compression coil springs that correspond to the specifications of various steering devices. Further, since the rotation of the spring seat is restricted, the behavior of the compression coil spring when the spring seat moves forward and backward is stable, and as a result, the set load can be adjusted accurately.

According to a second aspect of the present invention, in the rack supporting device of the rack and pinion type steering device according to the first aspect, the screw drive mechanism penetrates through the insertion holes of the fixing member and the supporting member, An externally operable screw shaft which is supported in a free-wheeling manner while being restricted in axial movement by a fixing member and a supporting member, and a screw hole which is provided in the spring seat and allows the screw shaft to be inserted therethrough. A rack support device for a rack and pinion type steering device is provided.

According to the present invention, since the screw shaft can be externally rotated while the axial movement is restricted, the screw shaft can be stably operated, and as a result, the set load can be easily adjusted. Moreover, it can be realized with a compact and practical configuration of the screw shaft and the screw hole. According to a third aspect of the present invention, in the rack supporting device of the rack-and-pinion type steering device according to the second aspect, the head portion of the screw shaft is exposed to the outside from the corresponding insertion hole of the fixing member, and screw operation is performed. A rack support device for a rack-and-pinion type steering device, characterized in that a tip end of a screw shaft is retained by a retaining ring from a corresponding insertion hole of a support member.

According to the present invention, regulation of axial movement of the screw shaft can be realized with a simple structure. Moreover, since the screw shaft connects the fixing member and the supporting member, it is possible to handle each of these parts as an integral unit, and as a result, it is possible to reduce the labor for assembling these parts into the housing.
According to a fourth aspect of the present invention, in the rack supporting device of the rack and pinion steering device according to the second or third aspect, the spring seat has a tubular portion that forms the screw hole. Is non-rotatably and axially movably inserted into the insertion hole of the fixing member, and the inner peripheral portion of the insertion hole of the fixing member constitutes means for restricting rotation of the spring seat. A rack support device for a rack and pinion type steering device is provided.

According to the present invention, the regulation of the rotation of the spring seat in the insertion hole of the fixing member can be realized compactly with a simple structure. The invention described in claim 5 is the invention according to claim 2.
The rack support device for a rack-and-pinion steering device according to any one of claims 1 to 4, further comprising a seal member that seals between an outer peripheral portion of the screw shaft and an inner peripheral portion of a corresponding insertion hole of the fixing member. A rack support device for a rack and pinion type steering device is provided.

According to the present invention, the seal member can prevent foreign matter from entering from the outside. Moreover, the seal member is
It is possible to impart a frictional force to the screw shaft and to prevent the screw shaft from rotating, and as a result, it is preferable to maintain the set load. The invention according to claim 6 is the invention according to claims 2 to 5.
The rack support device for a rack-and-pinion steering device according to any one of claims 1 to 5, further comprising means for holding the rotational position of the screw shaft with a predetermined holding force. A support device is provided.

According to the present invention, it is more preferable that the rotation of the screw shaft can be prevented and the set load can be maintained.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION A steering device according to an embodiment of the present invention will be described below. FIG. 1 is a partial cross-sectional front view of a steering device showing an embodiment of the present invention. The steering device A is a rack and pinion type steering device. The steering device A includes a pinion shaft 2 that rotates by a steering operation, a rack shaft 3 that meshes with the teeth of the pinion shaft 2, and a housing 4 that covers the rack shaft 3. The pinion shaft 2 has a tooth portion and a shaft portion, and is rotatably supported by the housing 4 on both sides of the shaft portion via bearings 6 (only a part is shown). Also,
Although not shown, one end of the shaft portion of the pinion shaft 2 is connected to the steering wheel so as to rotate integrally therewith. The rack shaft 3 has a bearing member (not shown) in the axial direction (see FIG.
Is movably supported along a direction (perpendicular to the paper surface of FIG. Both ends of the rack shaft 3 are connected to steering wheels via tie rods. As a result, as the steering wheel rotates, the rack shaft 3 moves in the axial direction, and steering is performed.

The housing 4 is formed of a hard metal member such as aluminum. The housing 4 moves from the meshing position of the rack shaft 3 and the pinion shaft 2 to the rack shaft 3
The holding hole 30 extends in a direction orthogonal to the axial direction of the. The holding hole 30 has a circular cross section,
The rack shaft 3 is sandwiched between the pinion shaft 2 and the rack shaft 3. In the following description, the direction in which the holding hole 30 of the housing 4 extends is also referred to as the axial direction (see arrow S).

The steering device A includes a rack support device 1 for supporting a rack shaft 3 and a holding hole 3 of a housing 4.
It has 0. The rack supporting device 1 includes a supporting member 7 arranged near the rack shaft 3, a fixing member 8 fixed to an inlet 31 on the side far from the rack shaft 3, and an interposing member between the fixing member 8 and the supporting member 7. And a compression coil spring 9 that operates. The fixing member 8 has a male screw on the outer circumference, and this male screw is screwed into the female screw of the screw portion 32 of the inlet 31 of the holding hole 30. The fixing member 8 is fixed by a lock nut 10. The inner end surface 35 of the fixed member 8 faces the end surface 40 of the support member 7 on the side farther from the rack shaft 3 with a predetermined gap. As a result, the amount of axial movement of the support member 7 can be regulated on the side away from the rack shaft 3, so that it is possible to prevent the amount of axial movement of the rack shaft 3 from becoming excessive and to cause rattling of the rack shaft 3. It is possible to prevent the generation of abnormal noise.

The support member 7 is formed of a metal hard member such as aluminum and has a substantially columnar shape. The end face 40 of the support member 7 is formed with a spring accommodating hole 41 made of a circular hole, and the compression coil spring 9 is formed in the spring accommodating hole 41.
Is housed. Further, the support member 7 is provided with a supporting recess 42 having an arc-shaped cross section, which is opposed to the end surface 40 and faces the rack shaft 3 and extends along the peripheral surface of the rack shaft 3.
The support member 7 is accommodated in the holding hole 30 so as to be slidable along the axial direction of the holding hole 30. The support member 7 is
The rack shaft 3 and the pinion shaft 2 support a portion of the rack shaft 3 which is opposite to the meshing portion of the rack shaft 3 where the rack shaft 3 and the pinion shaft 2 mesh with each other. At this time, the compression coil spring 9 is in a compressed state, and the rack shaft 3 is connected to the pinion shaft 2 via the support member 7.
It is urged to the side with a pressing force of a predetermined amount (hereinafter, also referred to as set load).

In particular, the rack supporting device 1 of the present steering device A has a load adjusting mechanism 11 for adjusting the set load.
have. Please refer to FIG. 1 and FIG. The load adjusting mechanism 11 includes a spring seat 12 that receives the compression coil spring 9, and a screw type drive mechanism 13 that moves the spring seat 12 forward and backward to adjust the set load of the compression coil spring 9. One end of the compression coil spring 9 has a spring accommodating hole 41 of the support member 7.
Received by the bottom of the. Also, the compression coil spring 9
The other end of the abutment portion 45 of the spring seat 12 and the screw type drive mechanism 1
It is received by the fixing member 8 via 3.

In the load adjusting mechanism 11, the screw type driving mechanism 1
3, the set load can be adjusted as described later.
As a result, the compression coil springs 9 having the same specifications can be shared by a plurality of steering devices having different set loads. Therefore, even when the set load is set differently according to the specifications of various steering devices, it is possible to reduce the number of types of the compression coil spring 9 for this purpose. In particular, the load adjusting mechanism 11 includes the spring seat 12
It has a detent structure 14 as a means for restricting the rotation of the. The anti-rotation structure 14 includes a pair of members facing each other in the rotation direction around the axis of the holding hole 30 and abutting against each other, for example, the inner peripheral portion 37 of the insertion hole 36 of the fixing member 8 and the tubular portion of the spring seat 12. And an outer peripheral portion 47 of 46 (see FIG. 3). As a result, the spring seat 12 is restricted from rotating around the axis of the holding hole 30 with respect to the fixed member 8, and thus rotates relative to the holding hole 30 and the compression coil spring 9 when adjusting the set load. Is also regulated. As a result, the spring seat 1
As a result of the behaviors of the spring seat 12 and the compression coil spring 9 being stabilized when the vehicle 2 moves forward and backward, the set load can be adjusted accurately. Therefore, it is possible to accurately realize a set load of a predetermined size according to the specifications of the steering device.

The screw type drive mechanism 13 is provided with the externally operable screw shaft 15 penetrating the insertion hole 36 of the fixing member 8 and the insertion hole 43 of the support member 7, and is provided in the spring seat 12 to insert the screw shaft 15 therethrough. And a screw hole 48. A male screw 50 provided at an intermediate portion of the screw shaft 15 is screwed into a female screw of the screw hole 48. The screw shaft 15 is supported rotatably while being restricted in axial movement by the fixing member 8 and the supporting member 7, and is rotatable relative to the fixing member 8 and the supporting member 7.

As a result, the screw shaft 15 can be rotated from the outside while the axial movement thereof is restricted.
As a result of being able to stably operate 5, the set load can be easily adjusted. Moreover, the screw-type drive mechanism 13 can be realized with a compact and practical configuration of the screw shaft 15 and the screw hole 48. The screw shaft 15 is a large-diameter head 51 provided at one end.
And a small-diameter shaft portion 52 extending from the head portion 51 in the axial direction. The shaft portion 52 has a large diameter portion in the middle portion, and the above-described male screw 50 is formed on the large diameter portion. Screw shaft 1
The shaft portion 52 of 5 is inserted through the inside of the compression coil spring 9.

The head portion 51 of the screw shaft 15 is exposed to the outside from the corresponding insertion hole 36 of the fixing member 8 to form the screw operating portion 16, and a slot for rotating the screw shaft by using a tool. Have Further, the head portion 51 of the screw shaft 15 has a larger diameter than the inner diameter of the insertion hole 36 of the fixing member 8, and restricts the movement of the screw shaft 15 in one axial direction. The tip portion 53 of the shaft portion 52 of the screw shaft 15 is retained by the retaining ring 17 from the corresponding insertion hole 43 of the support member 7, and restricts the movement of the screw shaft 15 in the other axial direction. A peripheral groove is formed on the outer periphery of the tip portion 53, and the retaining ring 17 is fitted in the peripheral groove. As the retaining ring 17, for example, a known one such as one formed in a substantially C shape can be used.

As described above, the screw operating portion 16 and the structure for restricting the movement of the screw shaft 15 in the axial direction can be realized with a simple structure. Further, since both ends of the screw shaft 15 are regulated in the axial direction and the radial direction by the fixing member 8 and the supporting member 7, the screw shaft 15 and the compression coil spring 9 can be further stabilized when adjusting the set load. Moreover, since the screw shaft 15 connects the fixing member 8 and the supporting member 7, these respective portions 7, 8, 15 and these respective portions 7,
The unit 18 which is an integral part of the parts to be assembled to the 8 and 15
Can also be treated as As a result, it is possible to reduce the labor for assembling the respective parts of the unit 18 into the housing 4 as compared with the case where the respective parts of the unit 18 are separately assembled into the housing 4.

The spring seat 12 is a disk-shaped contact portion 45 that contacts the end of the compression coil spring 9 that is closer to the inlet 31 of the holding hole 30, and a cylinder that is erected at the center of the contact portion 45. Portion 46
Have and. The tubular portion 46 forms a screw hole 48. The tubular portion 46 is inserted into the insertion hole 36 of the fixing member 8 so as not to be rotatable and axially movable. Outer peripheral portion 47 of tubular portion 46
Is formed in a polygonal column shape, for example, a hexagonal column shape, and correspondingly, the inner peripheral portion 37 of the insertion hole 36 of the fixing member 8 is formed in a polygonal column shape, for example, a hexagonal column shape. The above-mentioned detent structure 14 that restricts rotation is configured. In addition,
Outer peripheral portion 47 of the cylindrical portion 46 that constitutes the rotation stopping structure 14
The shape of the inner peripheral portion 37 of the insertion hole 36 may be, for example, an elliptical or substantially D-shaped cross-section that cuts in the axial direction. If there is

As a result, the rotation of the spring seat 12 can be restricted in the insertion hole 36 of the fixing member 8 with a simple structure.
Moreover, it can be realized compactly. The cylindrical portion 46 has an outer peripheral portion 47 that constitutes a part of the rotation stopping structure 14 and a screw hole 48 while being movable in the axial direction, and the insertion hole 3 of the fixing member 8.
6 can be arranged together and the axial length of the tubular portion 46 for securing the strength of the screw hole 48 can be secured, while the tubular portion 46 can be secured.
Can be prevented from increasing in size in the axial direction.

Further, in the corresponding insertion hole 36 of the fixing member 8, a sealing member for sealing between the outer peripheral portion 54 of the screw shaft 15 and the inner peripheral portion 37 of the corresponding insertion hole 36 of the fixing member 8 is provided. 19 are provided. The seal member 19 is an annular member having a rectangular cross section. It is arranged in a portion of the outer peripheral portion 54 of the screw shaft 15 that is closer to the head 51 than the male screw 50 of the shaft portion 52 of the screw shaft 15. In this way, the seal member 1
9 can prevent foreign matter such as dust from entering the male screw 50. Moreover, the seal member 19 is the screw shaft 1.
Since a frictional force can be applied to 5, the screw shaft 15 can be prevented from rotating, and as a result, it is preferable to maintain the set load.

The seal member 19 has a large diameter portion of the shaft portion 52 of the screw shaft 15 and a step portion 38 of the insertion hole 36 of the fixing member 8.
And the elastic restoring force of the compression coil spring 9 is transmitted from the screw shaft 15 to the fixing member 8 in the axial direction. It is also conceivable to provide a click mechanism 20 as a means for holding the turning position of the screw shaft 15 with a predetermined holding force. This click mechanism 20 is, as shown in FIG.
The ball 25 biased by the spring 24 may be housed in the hole 26 of one member, and the ball 25 may be retained by being fitted into the recess 27 of the other member. Ball 2
The force required for 5 to get over the peripheral edge of the recess 27 is the holding force. Further, as shown in FIG. 5, the recesses 28 and the protrusions 29 that mesh with each other may be provided in the portions facing each other. The holding force is the force required for the concave portion 28 and the convex portion 29 to get over each other. Thereby, a click feeling can be given. The click mechanism 20 is provided between the screw shaft 15 and a member that rotates relative to the screw shaft 15, for example, the fixing member 8. The one member and the other member described above are the fixing member 8 and the fixing member 8.
The screw shaft 15 can be exemplified.

With such a click mechanism 20, it is more preferable to prevent the screw shaft 15 from rotating and to maintain the set load. Further, in the case of the compression coil spring 9, the amount of bending can be made larger than that of the rubber plate or the disc spring, and the range of adjustment of the set load by the single compression coil spring 9 can be widened. Moreover, in the compression coil spring 9,
The relationship between the bending amount and the elastic restoring force changes linearly (see FIG. 7), which is preferable for obtaining a desired set load.

Further, the screw type drive mechanism 13 can increase the operating force applied to the screw operating portion 16 and transmit it as a force for moving the spring seat 12 back and forth in the axial direction, so that the elastic restoring force of the compression coil spring 9 is resisted. However, the amount of movement of the spring seat 12 in the axial direction can be easily adjusted, which is preferable. Unit 18
Is a supporting member 7, a fixing member 8, a compression coil spring 9, and a screw shaft 15 as a connecting member between the supporting member 7 and the fixing member 8.
And a spring seat 12, a retaining ring 17, a seal member 19, a click mechanism 20, and a lock nut 10. The unit may include at least the support member 7, the fixing member 8, the compression coil spring 9, the screw shaft 15, and the spring seat 12. With such a unit, the labor for assembling the components into the housing 4 can be reduced, and even if the labor for adjusting the set load is required, the takt time on the assembly line is not reduced.

Further, by making it into a unit, it is possible to prevent forgetting to assemble components such as the support member 7 and the compression coil spring 9 at the time of assembly. That is, in the conventional structure, after the support member and the compression coil spring are assembled to the housing, the fixing member is screwed into the holding hole. It was not possible to confirm it from the above, and it was not possible to prevent forgetting to assemble the above-mentioned parts. On the other hand, in the present embodiment, it is possible to confirm that each component of the unit 18 is assembled to the unit 18 in a state where the unit 18 is a single unit before being assembled to the housing 4. That is, the support member 7, the screw shaft 15 and the like can be easily visually recognized, and the compression coil spring 9, the spring seat 12 and the like are difficult to visually recognize after the unit is assembled. It can be easily confirmed whether or not it is. After confirmation, the unit 18 may be assembled to the housing 4. Unit 18 in housing 4
The presence / absence can be easily confirmed by visual check.

The set load is adjusted as follows. First, before adjusting the set load, the fixing member 8 and the supporting member 7
And are aligned in a predetermined axial position. That is, the support member 7 is provided along the rack shaft 3, and a predetermined gap is provided between the fixed member 8 and the support member 7. The predetermined axial position may be a position where the fixing member 8 and the supporting member 7 are in contact with each other, and in this case, after adjusting the set load, a predetermined gap is provided between the fixing member 8 and the supporting member 7. Will be opened and the set load will be adjusted in anticipation of this gap.

When adjusting the set load, the screw operating section 1 is used.
When 6 is rotated by a tool, the screw shaft 15 is rotated,
The spring seat 12 moves back and forth in the axial direction, and the amount of bending (compressive deformation amount) of the compression coil spring 9 changes. A set load can be obtained as an elastic restoring force corresponding to the amount of bending. The set load can be adjusted by adjusting the bending amount. For example, in the graph of FIG. 7, the amount of deflection is adjusted within the range of 2.5 mm to 3.5 mm, and correspondingly, the set load is adjusted within the range of about 300N to about 600N. In this way, the set load can be obtained by adjusting it in a wide range.

Further, in the present steering apparatus A, a desired set load can be realized by utilizing the existing compression coil spring 9 and adjusting the amount of bending of the compression coil spring 9. Therefore,
It is possible to promptly respond to changes in the specifications of the steering device. The spring seat 12 is provided so as to contact one end of the compression coil spring 9 that is closer to the rack shaft 3,
The other end of the compression coil spring 9 may be brought into direct contact with the fixing member 8.

Although a single compression coil spring 9 is provided, a plurality of compression coil springs 9 may be used in combination. In this case, all of the plurality of compression coil springs may be adjustably provided, or only a part of the plurality of compression coil springs may be adjustably provided. Besides, various modifications can be made within the scope of the claims of the present invention.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of a rack support device of a rack-and-pinion type steering device showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a main part of the load adjusting mechanism of FIG.

FIG. 3 is a sectional view of a detent structure.

FIG. 4 is a schematic diagram of a click mechanism.

FIG. 5 is a schematic view of another click mechanism.

FIG. 6 is a schematic view showing the operation of the load adjusting mechanism.

7 is a graph showing the relationship between the amount of flexure of the compression coil spring of FIG. 1 and the set load.

[Explanation of symbols]

1 Rack Support Device of Rack and Pinion Steering Device 2 Pinion Shaft 3 Rack Shaft 4 Housing 7 Support Member 8 Fixing Member 9 Compression Coil Spring 12 Spring Seat 13 Screw Type Drive Mechanism 14 Detent Structure (Regulating Rotation of Spring Seat) 15) Screw shaft 16 Screw operating portion 17 Retaining ring 19 Seal member 20 Click mechanism (means for holding the rotational position of the screw shaft with a predetermined holding force) 30 Holding hole 31 Holding hole inlet 32 Screw of holding hole inlet Part 36 Fixing member insertion hole 37 Inner peripheral part of fixing member insertion hole 43 Support member insertion hole 46 Spring seat cylindrical portion 48 Spring seat screw hole 51 Screw shaft head 53 Screw shaft tip 54 Screw Outer periphery of shaft S Axial direction of holding hole

Claims (6)

[Claims] 1. A support member which is slidably accommodated in a holding hole of a housing along an axial direction of the holding hole to support a rack shaft, and a fixing member which is screwed and fixed to a screw portion at an inlet of the holding hole. A rack support device for a rack-and-pinion steering device, comprising: a member; and a compression coil spring that is interposed between the fixing member and the support member and biases the rack shaft toward the pinion shaft side through the support member. A rack comprising a spring seat for receiving a coil spring, means for restricting rotation of the spring seat, and a screw drive mechanism for advancing and retracting the spring seat to adjust a set load of the compression coil spring. Rack support device for and pinion type steering device. 2. The rack support device for a rack and pinion steering device according to claim 1, wherein the screw drive mechanism penetrates through the insertion holes of the fixing member and the supporting member, and the shaft is formed by the fixing member and the supporting member. A rack-and-pinion type steering device characterized by including an externally operable screw shaft that is supported to rotate freely while restricting directional movement, and a screw hole that is provided in the spring seat and through which the screw shaft is inserted. Rack support device. 3. The rack supporting device for a rack and pinion steering device according to claim 2, wherein the head portion of the screw shaft is exposed to the outside from a corresponding insertion hole of the fixing member to form a screw operating portion. A rack support device for a rack and pinion type steering device, wherein a tip end portion of the screw shaft is retained by a retaining ring from a corresponding insertion hole of the support member. 4. A rack support device for a rack and pinion steering apparatus according to claim 2 or 3, wherein the spring seat has a tubular portion that forms the screw hole, and the tubular portion is a fixing member. A rack-and-pinion type, characterized in that it is inserted into the insertion hole so as not to be rotatable and axially movable, and the inner peripheral portion of the insertion hole of the fixing member constitutes means for restricting rotation of the spring seat. Rack support device for steering device. 5. A rack supporting device for a rack-and-pinion type steering device according to any one of claims 2 to 4, wherein a space between an outer peripheral portion of the screw shaft and an inner peripheral portion of a corresponding insertion hole of the fixing member is provided. A rack support device for a rack and pinion type steering device, further comprising a sealing member for sealing. 6. The rack supporting device for a rack and pinion steering device according to claim 2, further comprising means for holding the turning position of the screw shaft with a predetermined holding force. Rack and pinion type steering device rack support device.