JPS596169A - Seal structure for steering device - Google Patents

Abstract

PURPOSE:To protect the steering shaft and coupling means from open air with high sealing performance, by blocking the steering shaft and coupling means to be arranged at the outside of car from open air by means of a tubular resilient sealing member. CONSTITUTION:One end of a tubular resilient sealing member 18 is secured between a dash panel 1 and a column bracket 2a of a column tube 2 through a bolt 19. The other end is secured under pressure engaged state to the cover cap 20 of a power steering gear 4a. A lip projection 18a formed on said member 18 is engaged with a groove 20a formed in said cap 20 while the flange section 21a of the plate member 21 arranged at the rear of said projection 18a is secured to the end face of the power steering gear 4a through a bolt 22. Since an open air blocking space (S) is formed, a sealing member for the open air is not required but requiring only one sealing part.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a steering device seal flIlj f3
Change i to 1.

Examples of conventional steering devices include 1. f A steering device as shown in Fig. 1 is known.To explain its structure, 1 is a dash panel, 2 is a column tube, 3 is a steering shaft, 4 is a steering gear, and 5 is the steering gear. 4 gear shaft 6
This is a universal joint type shaft joint that connects the steering shaft 3 and the steering shaft 3. The steering seal structure consists of the steering shaft sealing material 7 and the column bracket vi2 of the column tube 2.
The structure consisted of a mount sealing material 8 and a gear shaft sealing material 9, which were clamped and fixed to a.

Therefore, in the conventional steering seal structure, in order to prevent the intrusion of dust, water, etc. from outside the vehicle, three parts are used as seal parts: the steering shaft seal material 7, the mount seal material 8, and the gear shaft seal material 9. This method uses seal parts, and not only does it have the problem of increasing the number of seal parts, but it also has the problem of increasing the number of seal parts.Furthermore, there is a sealing part in the part corresponding to the outside of the vehicle from the sealing position of the steering shaft seal material 7 to the steering gear 4. Unipersal joint type shaft joint 5
Since it is exposed to the outside air, it is not sufficiently protected and has the problem of deterioration of durability due to dust etc.

In addition, as a conventional steering device, a power steering device as shown in Fig. 2 is known, and its configuration is as follows: 1 is a dash panel, 2 is a column tube, 3 is a steering shaft, 4aG!
Control port - Power steering gear with 10' structure, 10 is steering shaft 3 divided into two parts
The rubber couplings "f-ring" and 11 that connect a and 3b are shaft joints that connect one steering shaft 3b and the valve shaft 12. The steering seal structure is composed of a steering shaft sealing material 7a having a needle bearing, a mount sealing material 8 clamped and fixed to the column bracket (Fd<2a) of the column tube 2, and an oil seal 13 that seals the valve shaft 12. Met.

The diameter is the power steering seal structure Jθ shown in Figure 2.
However, two seal parts, the steering shaft seal material 7a and the mount seal material 8, were used as seal parts, which not only had the problem of increasing the number of seal parts, but also had the problem of increasing the number of seal parts. Since the structure is a partially sealed structure similar to the conventional example shown in Fig. 1,
The rubber coupling IO and the shaft joint 11 are exposed to the outside air, and the rubber coupling 10 hardens over time, reducing the sound and vibration damping effect. This has the problem that dust intrusion into the oil seal 13 also reduces the sealing effect of the valve shaft 12.

The present invention has been made to solve the problems of the conventional steering seal structure as described above, and an object of the present invention is to provide a single seal structure as a five-piece seal, but to solve the problems of the conventional steering seal structure. The high sealing performance f? protects the steering shaft and connection means installed in this area from the outside air. The object of the present invention is to provide a seal structure for a steering device that exhibits the following properties.

That is, in order to achieve the above-mentioned object, the present invention provides a column tube supported by a dash panel, a steering gear shaft inserted into the column tube, and a steering wheel connected to the steering shaft via a connecting means. In the steering device having a gear, a planar elastic seal member is provided, one end of which is clamped and fixed to the dash panel and the column tube, and the other end of which is fixed to the steering gear, and the steering shaft and the connection are disposed outside the vehicle interior. The means is formed to be isolated from the outside air by a cylindrical elastic seal assembly.

Therefore, in such a seal structure, one end of the cylindrical elastic seal member is clamped and fixed to the dash panel and the column tube to provide the performance of the mount seal material, and also to isolate the exterior part of the vehicle from the outside air. Since seal parts such as shaft seals can be omitted, the number of seal parts can be reduced to one, and even though it is a single seal part, it can be used for steering gears that were conventionally installed outside the vehicle interior. This provides a high sealing effect that protects the foot and the connecting means from the outside air.

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

Incidentally, the same parts as those of the conventional model 11 will be described with the same reference numerals.

First, FIG. 6 and FIG. 4 are diagrams showing the first embodiment of the present invention, and to explain its structure, 1 is a dash panel, and the JET interior and engine roots (outside the vehicle interior).
It is set up to separate the two. 2 is the column tube, and is the column bracket attached to U9 at the bottom? 4MZa&thus, it is elastically supported by the dash panel 1. Reference numeral 3 denotes a steering shaft, which is inserted into the column tube 2. 4a is a power steering gear, which has a control pulp structure inside. It is a rubber coupling that connects 3a and 3b (steering shirt divided into two halves) and produces a swishing sound (squeezing sound) peculiar to power steering.
This prevents other vibrations and shocks from being transmitted to the driver via the steering shaft 3. 11 is a shaft joint for connecting one steering shaft 3b and the valve shaft 12, and 13 is an oil seal for sealing the valve shaft 125.

14 is a steering wheel provided at one end of the steering shaft 3, 15 is a column clamp, 16 is a dash guard, and 17 is a bitman arm.

To explain the seal h'η structure, 18 is a cylindrical elastic seal part 42, one end of which is attached to the dash panel 1.
and column clamp of column tube 2) F'1S2a
The bolt/nut is clamped between the cylindrical elastic seal member 18, and the other end is secured to the cover cap of the power steering gear 4a in a royal engagement state. The formed lip protrusion 18a is engaged with the concave groove 20a formed on the cover cap 20, and a plate member 21 is arranged behind the lip protrusion 18a.
The flange portion 21a of the plate member 21 and the end face of the power steering gear 4a are tightened and fixed by the bolts 22. The cylindrical body of the cylindrical elastic seal member 18 is connected to the end surfaces of the dash panel 1 and the power steering gear 4a, or to non-parallel surfaces! ``In order to maintain its structure, it has a truncated hollow cylindrical shape to suit the structure of the building.

Furthermore, in the first embodiment, one end of the cylindrical elastic seal assembly 18 is connected to the dash panel 1 and the column tube 2.
The cylindrical elastic seal toy 18 functions as a mount sealing material by clamping and fixing it to the column bracket part 2a of the vehicle, and the cylindrical elastic seal part toy 18 isolates the exterior part of the vehicle cabin from the outside air to form an outside air isolation space S. Since it is extended to the other end fixed to the gear 4a, there is no need for a sealing material to seal the steering shaft 3 and the valve shaft 12 from the outside air, and the sealing part point 11≦− can be satisfied.

Furthermore, as described above, although the cylindrical elastic seal member 18 is the only seal component, it has a comprehensive seal structure that forms the outside air isolation space S. b, the rubber cushion ring ゛lO as a connecting means and the shaft joint 11 are protected from the outside air, and the soundproofing effect is particularly reduced due to the hardening of the rubber cuff ring 10 over time.
It is possible to prevent dust from entering the oil seal 13, and the long-term maintenance of the valve shaft 12 can be achieved.

In addition, since the cylindrical elastic seal part J8 is made of elastic material such as rubber, it is difficult to propagate swish sounds and vibrations. ! j Lt≦Do not give a tube.

;1! In addition, in the first embodiment, the logic elastic seal part 4
Since the 18th protrusion 18a and the 18th protrusion 18a are engaged with each other in a biting manner, it is possible to achieve a good sealing performance.

;Next! To explain the second embodiment shown in 5th [4], the steering wheel configuration includes a power steering gear 71. Instead, an ordinary steering gear 4 is used, structure 7; ν is provided with a seal ring on the gear shaft 6, and a universal joint type shaft joint 5 is used to connect the steering shaft 3 and gear shaft 6. This embodiment differs from the first embodiment in that it is used.

Also, the seal structure? In the end, since the dash panel 1 and the end surface of the steering gear 4 are parallel surfaces,
This embodiment differs from the first embodiment in that the cylindrical main body of the cylindrical elastic seal member 18 has a hollow cylindrical shape.

Therefore, as in the first embodiment, the number of seal parts is
Since it has a comprehensive seal structure that can be rubbed and forms an outside air-blocking space S, the steering shaft 3 and the universal joint-type shaft joint 5 as a connecting means, which are disposed outside the vehicle, are protected against outside air. This prevents damage to the durability of the connecting means due to the intrusion of dust, water, etc., and also prevents deterioration of sealing performance due to the intrusion of dust into the seal ring.

Although the sealing structure of the steering apparatus of the present invention has been explained above using the illustrated embodiment, the specific structure is not limited to the illustrated embodiment, and for example, a rack and pinion type steering wheel may be used. Whether it's a device or a recirculating Doll type steering device,
Needless to say, the present invention can be applied to other types of steering devices, and can also be applied to power steering devices or ordinary steering devices N.

[Brief explanation of the drawing]

Figure 1 is a sectional view showing the conventional steering seal structure.
FIG. 2 is a sectional view showing a conventional steering seal structure on the other side, FIG. 6 is an overall view showing a steering device equipped with the seal structure of the present invention, and FIG. 4 is a first embodiment of the seal structure of the present invention. Show 2i! , 31'JA section enlarged sectional view, 5th
FIG. 1 is a sectional view showing a second example of 1ω. 1... Dash noggle, 2... Column tube, 3
...Steering shaft, 5...Universal joint type shaft joint (connection means), 10.
... Rubber coupling (connection means), 18 ... Cylindrical elastic seal member. Saba City Applicant Fl ) (<Autotun Co., Ltd.

Claims (1)

[Claims] 1) A column tube supported by a dash panel, a steering shaft inserted into the column tube,
In a steering device having a steering gear connected to the steering shaft via a connecting means, a cylindrical elastic seal member is provided, one end of which is clamped and fixed to the dash panel and the column tube, and the other end of which is fixed to the steering gear. 1. A seal structure for a steering device, characterized in that a steering shaft and a connecting means disposed outside a vehicle are formed to be isolated from outside air by a cylindrical elastic seal member.