KR200154278Y1 - Shock absorbing and blocking device for steering universal joint - Google Patents

Abstract

The present invention relates to a shock load absorbing and blocking device of a steering universal joint. The present invention relates to a shock load absorbing and blocking device of a universal joint which blocks the impact load by breaking and escaping while absorbing the impact load of the shaft.

The present invention forms a universal joint shock absorbing and blocking device with a bent connecting plate, and connects the upper and lower universal joint shafts respectively, so that the impact load during the collision of the vehicle is primarily absorbed by the breaking of the molding pin, Secondly, after the molding pin is broken, the connecting plate connected to the upper and lower universal joint shafts is twisted to absorb the impact load again, and finally the remaining impact is generated when the connecting plate connected to the upper and lower universal joint shafts is separated and separated. The present invention provides a steering universal joint impact load absorbing and blocking device for a vehicle configured to block loads from being transmitted to the driver.

Description

Steering Universal Joint Impact Load Absorption and Blocking of Vehicle

The present invention relates to a shock load absorbing and blocking device of a steering universal joint, and in detail, coupled to one end of the upper and lower universal joint shafts corresponding to each other, the upper and lower universal joint shafts are connected and fixed, respectively, in case of a vehicle collision. The present invention relates to a shock load absorbing and blocking device of a universal joint which blocks the impact load by breaking and twisting or breaking away the impact load of the lower universal joint shaft.

In general, the rotational force of the steering wheel is transmitted to the universal joint by the steering column and the universal joint is connected to the pinion gear shaft to transmit the rotational force of the steering column to the pinion gear shaft. The rotational force of the pinion gear is converted from linear rotation to linear movement through the rack gear to generate transmission steering force to the left and right wheels through the rack bar.

In a vehicle having such a steering device, in the event of an automobile crash accident, the driver's handle is collided with the steering wheel of the steering device and is often injured. Therefore, in order to avoid excessive collision with the steering wheel and to minimize human accidents, recently, various types of shock absorbing and blocking devices that can absorb and block impact loads during vehicle collision between the steering column of the vehicle and the pinion gear are applied.

1 is a cross-sectional view showing an example of a universal joint shaft in which a conventional shock load absorbing structure is installed. The serration is performed by broaching the inner diameter of the large universal joint shaft 5 connected to the pinion gear. And the serration is also formed at the end of the universal joint shaft (4) having a small diameter connected to the steering column, and the inner diameter of the universal joint shaft (5) is interconnected by the serration to the inner diameter, and thus the diameter of the connecting portion is The hole 6a is drilled at a predetermined position of the large universal joint shaft 5 and the smaller universal joint shaft to form a molding pin 6 through the tube 6a, thereby forming the upper and lower universal joint shafts 4 and 5. ), And when the impact of the car is applied, a predetermined or more impact load is applied to the serration when the impact load is applied through the universal joint shafts (4) and (5). And into the molding portion of the pin 6 and the frictional breaking the serration portion pushed by a buffer zone (p) is to absorb the impact load.

However, according to the conventional shock absorbing device, the gap between both shafts is precisely formed in order to generate an appropriate friction force between the universal shaft 5 having a larger diameter and the universal joint shaft 4 having a smaller diameter so as to absorb an impact. As a result, the manufacturing cost was increased accordingly, and the impact absorbing section L was too short when the vehicle crashed.

The present invention has been made through the above conventional problem, in separating the shock absorbing structure of the conventional universal joint into two shafts, a large diameter of the coupling coupled to the inner diameter of the upper universal joint shaft of the small diameter of the connection to the steering column is large The connection of the lower universal joint shaft is a shock absorbing device of the universal joint that can absorb the impact load of the vehicle by receiving a shock load during the collision of the vehicle and generating a frictional force in the connecting portion to cushion the movement along a certain moving distance. In the case of the difficulty of processing precision and the impact load caused by collision is large, the distance that can absorb the shock between upper and lower universal joint axes is limited, so that the impact load other than the shock absorption distance is transmitted to the driver. Bar, primary and secondary impact loads Phase with a structure which can be. The lower universal joint shaft is separated leaving the impact load caused by collision were to crash absorbing and blocking structure is required to block the transmitted to the driver.

Ultimately, the present invention increases the impact load at the moment of collision of the vehicle, and absorbs and sustains the impact load at the same time as the upper and lower universal joint shafts. Thus, there is a need for a shock absorbing and blocking device at the universal joint to obtain secondary absorption or buffering effects.

The present invention is to solve the problems of the conventional shock absorber of the universal joint as described above, and the primary shock absorbing function and the secondary upper and lower universal joint is separated from the connection to the impact absorbing device in the universal joint In consideration of the necessity, the impact load is quickly absorbed in the event of a collision and the collision load is blocked at the connection part which supports the universal joint shaft, and at the same time, it is twisted or separated again to prevent the impact load from reaching the driver, as well as the upper and lower universal joint shafts. The purpose of the present invention is to provide a shock absorbing and blocking device for a steering universal joint of a vehicle for achieving the effect of maintaining the fixation force of the vehicle and making it reusable by replacing only the connection part without damaging the universal lower and lower universal joints. There is this.

In detail, by bending and forming the universal joint shock absorbing and blocking device according to the present invention wrapped around the upper and lower universal joint shaft, respectively, the impact load during the collision of the vehicle primarily absorbs the impact load by breaking the molding pin Secondly, the connecting plate connected to the upper and lower universal joint shafts is twisted to absorb the impact load at the same time as the molding pin is broken, and finally, the upper and lower universal joint shafts are separated from each other to separate the remaining impact loads. It is characterized in that it is configured to be blocked from being delivered to the driver.

In addition, both sides of the bent connecting plate is formed by extending a predetermined height from the center to the upper portion by fastening with bolts and nuts to support and secure the upper and lower universal joint shafts and a plurality of peripheral surfaces of the connecting plate. Forming a cutaway groove is characterized in that it is formed to smooth the torsion of the connection plate during the impact load to increase the cushioning effect.

1 is a cross-sectional view according to an embodiment of a universal joint shaft installed with a conventional impact load absorbing structure,

Figure 2 is a perspective view of the universal joint shaft is installed shock absorbing structure according to the present invention,

3 is a cross-sectional view of the universal joint shaft coupling according to the present invention,

Figure 4a is a state before the collision of the universal joint shaft according to the present invention,

Figure 4b is a state showing that the joint member fixed and connected to the universal joint shaft in accordance with the present invention is broken,

Figure 4c is a state showing that the connection plate connected to the universal joint shaft is broken and separated according to the present invention.

＊＊＊ Explanation of symbols for main parts of drawings *＊＊

1 (11): Universal joint, 2 (12): Upper joint, 3 (13): Lower joint, 4 (14): Upper universal joint shaft, 5 (15): Lower universal joint shaft, 6 (23): Molding Pin, 6a (22): pipe, 16: connecting plate, 17: connecting piece, 18: fastening hole, 19: bolt, 20: nut, 21: cutting groove,

The present invention having the above characteristics has an upper universal joint shaft for connecting to a steering column, a lower universal joint shaft for connecting to a pinion gear, and a plurality of incision grooves for supporting the upper and lower universal joint shafts. The formed connection plate, through-holes respectively penetrated on both sides of the connection plate, molding pins for integrally fixing the upper and lower universal joint shafts through the pipes, bolts and nuts for detachably fastening the connection plate. Including a crash when the molding pin at the same time the upper and lower universal joint shaft connected to the connecting plate is twisted or at the same time separated from each other to provide a universal joint impact load absorbing and blocking device of the vehicle.

Preferably, the upper and lower universal joint shock absorbing and blocking devices are formed by bending connection plates to connect the upper and lower universal joint shafts, respectively, so that the impact load during the collision of the vehicle is primarily impacted by breaking the molding pin. The upper and lower universal joint shafts are twisted together to absorb the impact load, and finally the upper and lower universal joint shafts are separated from each other. Joint shock absorbing and blocking devices are provided.

In addition, by forming a plurality of cutting grooves on the circumferential surface of the bent connecting plate coupled to one end of the upper and lower universal joint shaft, to provide a universal joint shock absorbing and blocking device configured to more absorb the impact load due to torsion.

The upper and lower universal joint shafts are formed by extending both sides of the connecting plate from the center to the upper side by a predetermined height to be supported by fixing the upper and lower universal joint shafts. It provides a universal joint shock absorbing and blocking device that is easily fixed and configured to facilitate the separation and separation of the upper and lower universal joints during the impact load.

Hereinafter, with reference to the accompanying drawings an embodiment of the steering universal joint impact load absorbing and blocking device of the vehicle according to the present invention is as follows.

2 is a perspective view of a universal joint shaft having an impact load absorbing structure according to the present invention, one side of which is an upper universal joint shaft 14, and one side of a lower universal joint shaft 15 connected to a pinion gear; A connection plate 16 having a plurality of cutout grooves 21 formed on a circumferential surface thereof so as to correspond to one end portions of the lower universal joint shafts 14 and 15, respectively, and penetrating both sides of the connection plate 16. When the holes 22, the connecting plate 16 and the upper and lower universal joint shafts 14 and 15 are respectively coupled to the holes 22, molding pins 23 for fixing through the holes 22. ) And a bolt 19 and a nut 20 for detachably fastening the connecting plate 16.

3 is a coupling and longitudinal cross-sectional view of the universal joint shaft according to the present invention, the upper and lower universal joint shaft 14, 15 is coupled to the inside of the connecting plate 16, respectively, on both sides of the connecting plate 16 Fastening is fixed to the formed hole (22) by a molding pin (23), fastening formed on the connecting piece 17 formed by extending both sides of the connecting plate 16 by a predetermined height from the center in the combined state as described above It is sectional drawing of the state which showed the state which was integrally couple | bonded with the ball 18 by fastening etc. with fastening members, such as the bolt 19 and the nut 20.

When the upper and lower universal joints are joined, the upper and lower universal joint shafts 14 and 15 are connected in consideration of the rotational moment or bending moment applied to the shaft diameters of the upper and lower universal joints 14 and 15 that are expected during collision. A plurality of cutting grooves 21 are formed on the circumferential surface of the connecting plate 16 to be supported, and the upper and lower universal joint shafts 14 and 15 coupled to the inside of the connecting plate 16 are connected to the connecting plate ( 16) is integrally coupled and configured to be separated by some distance from the inside.

On the other hand, when the upper and lower universal joint shaft 14, 15 is formed to bend the connecting plate 16 for coupling, it is formed at a predetermined height in the center of the connecting play 16 and fastening holes (both sides) The connecting piece 17 having the 18 formed therein is formed, and a plurality of cutting grooves 21 are formed in the circumferential surfaces of the upper, lower and side surfaces of the connecting plate 16.

Then, at least two through-holes 22 are formed on both sides of the connection plate 16 on which the cutouts 21 are formed.

Meanwhile, bolts and nuts are used as fastening members for fastening both connecting pieces 17 of the connecting plate 16, but molding or riveting may also be used, and the upper and lower universal joint shafts 14 and 15 may be used. In addition to the molding pin 23 is fixed to the connection through the pipe 22 formed on both sides of the connecting plate 16 as a means for fixing) may be used by molding a rivet or synthetic resin made of metal.

Since the bent shape of the bent connecting plate 16 may be deformed as the shape of the rectangular member or the upper and lower universal joint shafts 14 and 15 is formed as a cylindrical or rectangular member, the shape It does not necessarily limit.

The universal joint configured as described above is when the vehicle collides with the upper and lower universal joint shafts 14 and 15 coupled to the connecting plate 16 with the molding pins 23, as shown in FIGS. 4A to 4C. As shown in FIG. 4B, the first shock is absorbed while the molding pin 23 is broken, and immediately after the molding pin 23 is broken, the connecting plate 16 is twisted as shown in FIG. 4C. The connecting plate 16 connected to the upper and lower universal joint shafts 14 and 15 is broken and the bolt 19 and the nut 20 fastened to the connecting piece 17 of the 16 together with the secondary impact load absorption. It acts to prevent the impact load from being transmitted to the driver while separating and dispersing the impact load.

And, by forming a plurality of cutting grooves 21 on the circumferential surface of the bent connecting plate 16 coupled to one end of the upper and lower universal joint shafts (14, 15), so as to more absorb the impact load due to torsion Works.

In addition, the fixing force between the upper and lower universal joint shafts 14 and 15 is properly maintained, and at the same time, only the connecting plate 16 is replaced without damaging the upper and lower universal joint shafts 14 and 15. You can make it reusable again.

As described above, the steering universal joint impact load absorbing and blocking device of a vehicle according to the present invention forms a connection plate so that the upper and lower universal joints can be integrally fastened and can be supported by molding pins and bolts and nuts. It is possible to provide a universal joint that can absorb more impact loads.

In addition, the primary impact load absorption is absorbed as the molding pin is broken, so it can be installed by changing only the molding pin freely according to the degree of the primary impact load, so that the primary load absorption structure can be easily modified according to the specification change. The impact load at the time of impact is absorbed primarily by the breaking of the molding pin, and the connecting plate connected to the upper and lower universal joint shafts at the same time as the molding pin is broken. Afterwards, the connection plate connected to the upper and lower universal joint shafts is separated and separated to prevent the remaining impact load from being transmitted to the driver, thereby minimizing the impact.

Claims (3)

An upper universal joint shaft for connection to a steering column; A lower universal joint shaft for connecting to the pinion gear; A connection plate having a plurality of cutout grooves for supporting the upper and lower universal joint shafts; A through hole respectively formed at both sides of the connection plate; A molding pin for integrally fixing the upper and lower universal joint shafts through the pipes; And Bolts and nuts for detachably fastening the connecting plate; Including collision, including the breaking of the molding pin at the same time the upper and lower universal joint shaft is connected to the connecting plate is twisted or at the same time separated from each other, the steering universal joint impact load absorbing and blocking device of the vehicle. According to claim 1, wherein the connecting plate is bent, both side pieces of the bent connection plate is extended to a predetermined height from the formed center portion to the upper portion to form a connection piece, bolts and nuts to be coupled to both sides of the connection piece Steering universal joint impact load absorbing and blocking device of a vehicle, characterized in that the fastening hole is formed. 3. The steering universal joint impact load absorbing and blocking device according to claim 2, wherein a plurality of cutouts are formed in the circumferential surface of the bent connecting plate.