MXPA00005578A - Wheel suspension assembly - Google Patents

Abstract

The invention relates to a wheel suspension assembly for the wheels of a motor vehicle which are driven. The wheels are each fastened to a locating face (2.1) of a brake body (2) in a detachable manner by means of wheel bolts (4). The brake body is rotationally mounted on a suspension assembly connected to the vehicle frame or vehicle body such that it can pivot and is also connected to a drive shaft. The end of the drive shaft on the side of the wheel is directly connected to the brake body (2) via a shaft section (1.2) having a polygonal outer contour (1.3) in order to provide a connection to the brake body (2), said connection being constructively simple and free of play in both an axial and as well as in a radial direction. In addition, the drive shaft is configured with a cylindrical shaft section (1.6), said section serving as a seat for the antifriction bearing (5), for the connection to said polygonal shaft section (1.2).

Description

INSTALLATION OF WHEEL SUSPENSION TECHNICAL FIELD The invention relates to a wheel suspension for the traction wheels 5 of a motor vehicle, which are each fixed removably by means of wheel bolts to a contact surface of a brake member, is say a brake drum or a brake disc, which in turn is installed rotatably by means of at least one roller bearing on a suspension rotatably connected to the frame or structure of the vehicle and connected to a driving arrow. Such wheel suspensions for the traction wheels of a motor vehicle are known in various versions. When a constant velocity joint is used for single wheel suspensions consisting of a ball joint, a ball star and balls installed in a ball cage, the ball joint in the Known structures are provided with a pin molded in one piece at its base, which serves as the driving arrow of the wheel and is fixedly connected for rotation to a bushing that is rotatably installed through at least one bearing of rollers on a guide bar connected to the frame or the structure of the vehicle. The non-slip connection between the bushing and the molded pin in the base of the patella, results by means of the meshing of the axial channel. Apart from the high costs of production, this meshing of the channel to be built both in the bushing and in the pin of the ball joint has the disadvantage that in the radial direction it does not allow the connection absolutely free of play between the two parts connected to each other in a non-slidable way. However, in view of the very high and dynamic load at this point that transmits the torque, even a small Radial play in the region of the axial channel indentation results in undesirable wear as well as undesirable noise and vibration.

SUMMARY OF THE INVENTION 5 The underlying objective of the invention is to provide a wheel suspension of the type described above for the traction wheels of a motor vehicle which, while simultaneously having a simplified structure, provides a connection between the drive shaft and the fixed wheel the brake member, which is absolutely free of play even in the radial direction, is say, without considering whether the brake member is a brake drum or a brake disc, and whether the traction wheel is a rear wheel with no steering or a steerable front wheel. The solution to this problem provided by the invention is characterized in that the end of the drive shaft on the side of the wheel is connected to through a section of the arrow having a polygonal outer contour, directly to the brake member, and that the driving arrow adjacent to this section of the polygonal arrow is constructed with a cylindrical section of the arrow that serves as a seat for the bearing of rollers. By means of this improvement according to the invention of the wheel suspension defined at the beginning, it is not required the hitherto necessary hub and its non-slip connection for the drive shaft of the wheel through the meshing of the axial channel, which does not allow any task clear of absolute and clear play in the direction radial. The end of the drive shaft on the side of the wheel is connected through the section of the arrow with a polygonal outer contour directly to the brake member, this polygonal arrow section clings to - - corresponding manner in a polygonal cavity of the brake member with the cancellation of any radial clearance. Since the drive shaft adjacent to the section of the polygonal shaft is further constructed at its end on the side of the wheel with a cylindrical shaft section serving as a seat for the inner ring of the roller bearing, the The hub function of the wheel used so far is used, partly by the brake member and partly by the drive shaft. In this way, in general, a structurally simpler wheel suspension comprising fewer components is produced, which is due to the elimination of a radial clearance unavoidable hitherto on the PTO side, taking additionally a considerably longer service life. According to a preferred practical embodiment of the invention, this wheel suspension finds application in single wheel suspensions in which the brake member is connected to the driving shaft by means of a constant velocity joint consisting of a ball joint, a ball and ball star installed in a ball cage. In these wheel suspensions it is proposed that the end of the ball joint on the side of the wheel constructed as a wheel drive shaft be connected through an arrow section having a polygonal outer contour directly to the brake member. In this specific mode the cylindrical section of the arrow that serves as a seat for the roller bearing, is builds between the section of the polygonal arrow and the kneecap. In this embodiment the advantage is also found in the elimination of the wheel hub as well as the radial clearance in the region of the brake / drive shaft member. According to a further feature of the invention the wheel drive wheel can be designed as a separate component and constructed through an end flange having a polygonal outer contour towards the - ball joint that is provided at its base with a cavity corresponding to the polygonal external contour of the extreme flange. This construction of the wheel drive shaft as a separate component and the free play connection of this component to the ball joint, provides the possibility of a further reduction in costs in the manufacture of the single wheel suspension according to the invention. In a preferred embodiment of the invention, the polygonal outer contour of the arrow section and / or the end flange of the wheel drive shaft is of conical construction in the axial direction so that a connection of the driving wheel arrow for the brake member on one side and for the ball joint on the other side which is free of play in both the axial and radial directions. According to a further feature of the invention, the drive shaft or the drive shaft of the wheel is provided with a thread for a fixing member which fixes the brake member on the drive shaft or the drive shaft of the wheel in the axial direction, being constructed the thread preferably as an internal thread for the threaded body of the fixing member constructed as a bolt, the head of the bolt of which rests against an annular contact surface of the brake member. This produces a very simple construction for the free play connection and without sliding of the brake member through the wheel drive motor for the ball joint, which according to the invention can further be developed in that at the same time the inner ring of the The roller bearing is held by the fixing member between the end flange and the driving shaft or wheel drive shaft and the contact surface. In order to use the pin simultaneously as a - tool for the installation and removal of the braking member of the driving shaft or driving wheel of the wheel, it is proposed by means of a further feature of the invention to provide the screw head with an inserted notch surface, in particular a hexagon insert, and for holding it in the brake member by means of a retaining member, for example a retaining ring, so that it can rotate but is substantially non-displaceable in the axial direction. In order to maintain a bolt in position in this manner in the brake member, the brake member and with it the roller bearing can not only be pushed towards the drive shaft, but the brake member can also be detached from the brake shaft. motor arrow without the need for a special tool for this purpose. The wheel suspension according to the invention is suitable not only for the traction rear wheels of a motor vehicle but also for the steerable front wheels of a motor vehicle equipped with front wheel drive. In the previous case, both the ball joint and the ball star of the constant velocity joint, they are constructed with arched ball rings for the balls, and the outer ring of the roller bearing is fixed on a steering pivot which in turn is installed on a guide rod in order to be rotated by means of a steering mechanism . Regardless of whether the suspension of the wheels according to the invention is a suspension for a traction rear wheel or for a front-wheel drive wheel, the brake member can be constructed as a brake disk or a brake drum.

BRIEF DESCRIPTION OF THE DRAWINGS An exemplary form of wheel suspension according to - »• *, - to the invention is illustrated in the drawings, which show: Figure 1, a longitudinal section through a wheel drive shaft connected in a non-slip manner to the brake member and the ball joint of a gasket constant velocity; Figure 2, a cross-section according to the section line I l-l I of Figure 1; and Figure 3, a cross section according to the lililí cut line of Figure 1.

DETAILED DESCRIPTION OF THE INVENTION The exemplified embodiment of the illustration is restricted to a single wheel suspension provided with a constant speed joint, although the illustrated type of wheel suspension can be used for all wheel suspensions, traction wheels . In the embodiment exemplified according to figures 1 to 3 only the relevant parts of this single-wheel suspension for a traction wheel of a motor vehicle, ie a wheel drive motor 1 which at its end in the side of the wheel is non-slidably connected to a brake member constructed in the embodiment exemplified as a brake disc 2, and in its Another end is again non-slidably connected to a ball joint 3 of a constant velocity joint, the remainder of which is not shown. Apart from the ball joint 3 in the illustration, this constant velocity joint comprises a ball star that is installed in a non-slidable manner in a drive shaft and works together, in a non-slidable manner, with the ball joint 3 through the ball installation in a cage of balls, working on one side the balls on the patella 3 and on the other side the ball star in the ball ring either in the rings of in-line or arched balls depending on whether the constant velocity joint is one with the possibility of axial displacement or is a constant velocity joint. Such constant speed joints are used both for the non-steered rear wheels 5 and for the steered front wheels of a motor vehicle. The torque transmitted by the drive shaft, which is not shown, towards the ball joint 3 is passed through the wheel drive shaft 1 to a wheel which can be detachably fixed to a contact surface 2.1 of the brake disc 2 by means of the wheel pins 4. The wheel that is not illustrated in the drawing, it centers on a central perforation constructed in its wheel reservoir by means of a centering flange 2.2 on the brake disc 2. The brake disc 2 in the exemplified embodiment illustrated is a ventilated brake disc. The wheel drive shaft 1 transmitting the torque from the ball joint 3 to the brake disk 2 is illustrated in the exemplified embodiment as a separate component, but can be constructed as a single piece with the ball joint 3. At the end of the wheel side, the driving arrow of the wheel 1 is constructed with an arrow section 1.2 having a polygonal external contour 1.3. This polygonal outer contour 1.3 of the arrow section 1.2 is best seen in the cross-section of FIG. 2. The brake disk 2 is provided with a corresponding polygonal cavity, so that in the assembled state according to Figure 1 there is a non-slip connection that transmits the torque between the wheel drive shaft 1 and the brake disc 2. Instead of the aforementioned polygon of a rounded equilateral triangle shown in Figure 2, any other polygonal outline shape can be selected. 25 The non-slip connection between ball joint 3 and the end on the side of - traction of the driving arrow of wheel 1, also results through a polygonal external contour 1.5, which is built in the lateral area of an extreme flange 1.4. This polygonal outer contour 1.5 of the end flange 1.4 of the wheel drive shaft 1 can be seen in figure 3, is compared to a corresponding polygonal cavity 3.1 at the base of the ball joint 3 so that at this point a non-slip connection between the wheel drive shaft 1 and the ball joint 3 also occurs. As can be seen in the exemplified embodiment, the polygonal outer contour 1.3 of the arrow section 1.2 and the polygonal outer contour 1.5 of the end flange 1.4 are of slightly conical construction in the axial direction so that when an axial force is applied, a connection between the driving wheel wheel 1 on one side, and the brake disc 2 or the ball joint 3 on the other hand, which are free of play in both axial and radial directions. Constructed between the end flange 1.4 and the arrow section 1.2 of the wheel drive shaft is an arrow section 1.6 with an outer cylindrical surface 1.7 which serves as the seat for the inner ring of a roller bearing 5 illustrated in FIG. the modality exemplified as a double ball bearing. The inner ring of this roller bearing 5 rests against the brake disc 2 between the end flange 1.4 of the wheel drive shaft 1 and the contact surface. Through the outer ring of this roller bearing 5, the wheel drive shaft 1 and with it, the brake disc 2 are installed rotatably on a guide rod which is not illustrated, and is rotatably connected to the frame or structure of the motor vehicle. As for the suspension of a wheel that is a suspension for a front wheel steered, the outer ring of the roller bearing 5 is ^^^ ¡^ i ^^ g ^ ¡* | g ¡^ * ^ - located on a steering pivot which in turn is installed on a guide rod of the motor vehicle in order to rotate around a rotating shaft. In order to secure the position of the parts shown in Figure 1, the wheel drive shaft 1 is provided with an internal thread 1.1 in which the threaded body 6.1 of the bolt 6 engages the head of the bolt 6.2, which rests against an annular contact surface 2.3, which according to FIG. 1, the centering flange 2.2 is built in the brake disc 2. It can also be seen from FIG. 1, that in the embodiment exemplified, the head Bolt 6.2 is provided with a groove surface constructed as an insert hexagon 6.3 and is held in the brake disc 2 so that it is rotatable but substantially not axially displaceable by means of a retaining member constructed as a retaining ring 7. As a result of this construction, if necessary, it is possible to remove the brake disc 2, together with the roller bearing 5, towards the driving shaft of wheel 1 only with the help of a bolt 6, and in doing so, simultaneously establish the connection between the drive shaft of the wheel 1 on the one hand, and the brake disk 2 as well as the ball joint 3 on the other hand, which they are free of play in the radial and axial directions. When removing the brake disc 2 out of the wheel drive shaft 1, it is also possible to use only the pin 6 since when it is unscrewed from the internal thread 1.1 of the wheel drive shaft 1 through the retaining ring 7, it carries the brake disk 2 together with it. ^ stat - ^ s ^. ra ~ a < a? ri8 «Éa» a? gN &> - > - »&-», ^. - ^^^^ f ^ ^ b-í ^ 'fhx ^^ iiiy? sStíÉ? - List of reference numbers 1 Wheel drive shaft 1.1 Internal thread 1.2 Arrow section 1.3 Polygonal external contour 1.4 End tab 1.5 Polygonal external contour 1.6 Arrow section 1.7 Surface cylindrical area 2 Brake disc 2.1 Contact surface 2.2 Centering tab 2.3 Contact surface 3 Ball joint 3.1 Polygonal cavity 4 Wheel bolt 5 Roller bearing 6 Bolt 6.1 Threaded body 6.2 Bolt head 6.3 Hexagon insert 7 Retaining ring

Claims (11)

- CLAIMS

1. The wheel suspension for the traction wheels of a motor vehicle which are each fixed removably by means of wheel bolts (4) to a contact surface (2.1) of a brake member (2), which for its part it is installed in a rotary manner by means of at least one roller bearing (5) in a suspension connected in a rotatable manner to the frame or structure of the vehicle and connected to a driving shaft, characterized in that the end of the driving shaft on the side of the wheel it is connected through an arrow section (1.2) having a polygonal outer contour (1.3) directly to the brake member (2) and that the driving arrow (1) adjacent to this polygonal arrow section (1.2) is constructed with a cylindrical arrow section (1.6) that serves as a seat for the roller bearing (5).

2. The wheel suspension according to claim 1 for a suspension of a single wheel in which the brake member 2 is connected to the driving shaft by means of a constant velocity joint consisting of a ball joint (3), a star of ball and balls installed in a ball cage, characterized in that the end of the ball joint (3) on the side of the wheel constructed as a wheel drive shaft (1), is connected through an arrow section (1.2) ) having a polygonal outer contour (1.3) directly to the brake member (2), the cylindrical arrow section (1.6) serving for the roller bearing (5) being constructed between this section of polygonal arrow (1.2) serving as a seat. and the patella (3). -

3. The wheel suspension according to claim 2, characterized in that the wheel drive shaft (1) is designed as a separate component and is connected through an end flange (1.4) having a contour 5 external polygonal (1.5) for the patella (3), which is provided at its base with a cavity (3.1) that corresponds to the polygonal external contour (1.5) of the extreme flange (1.4).

4. The wheel suspension according to at least one of the claims 1 to 3, characterized in that the polygonal external contour (1.3, 1.5) of the arrow section (1.2) and / or the end flange (1.4) is Conical construction in the axial direction.

5. The wheel suspension according to one of claims 1 to 4, characterized in that the drive shaft / wheel drive wheel (1) is provided with a thread (1.1) for a fastening member that fixes the brake member ( 2) on the drive shaft / wheel drive shaft (1) in the axial direction.

6. The wheel suspension according to claim 5, characterized in that the thread is constructed as an internal thread (1.1) for the threaded body (6.1) of the clamping member constructed as a pin (6), of which the Bolt head (6.2) rests against an annular contact surface (2.3) of the brake member (2). 25 -

7. The wheel suspension according to claim 5 or 6, characterized in that the inner ring of the roller bearing (5) is simultaneously clamped by the clamping member between the end flange (1.4) of the wheel drive shaft ( 1) and the contact surface in the brake member (2).

8. The wheel suspension according to claim 6 or 7, characterized in that the bolt head (6.2) is provided with an inserted notch surface (6.3) and is held in the brake member (2) in a manner rotating but substantially without axial displacement by means of a retaining member (7).

9. The wheel suspension according to at least one of claims 2 to 8, characterized in that the ball joint (3) and the ball star of the constant velocity joint are constructed with arched ball rings for the balls, and The outer ring of the roller bearing (5) is fixed to a steering pivot which in turn is installed on a guide rod in order to rotate by means of a steering mechanism.

10. The wheel suspension according to at least one of claims 1 to 9, characterized in that the brake member is constructed as a brake disc (2).

11. The wheel suspension according to at least one of claims 1 to 9, characterized in that the brake member is constructed as a brake drum. ^ gg ^^^ i ^^^^^^^^^^ g ^^^^^^^^ iáiliÉE ___ £ a_g ^ s¿¿¡í ^^^ srt ^ ßja ^