JPS5910413Y2 - Universal joint for vibration and noise prevention - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a universal joint used for a drive shaft, an operating shaft, etc. of a vehicle such as an automobile.

As shown in FIGS. 1 and 2, a conventionally known pot joint has a pin 2 press-fitted into a through hole 1a provided in a shaft 1, and bearing blocks 3 fitted into both ends of the pin 2.
The bearing blocks 3 are respectively assembled into the grooves 5 of the cylindrical member 4 to form a universal joint, and the shaft 1 is connected to the cylindrical member around the axis of the pin 2 and with the outer end surface of the bearing block 3 in contact with the inner surface of the cover 6. It can swing within the cylindrical hole 7 of the cylindrical member 4 and can also slide along the groove 5 of the cylindrical member 4.

However, due to dimensional accuracy, wear, etc., there is a gap between the cylindrical member 4 and the bearing block 3 at the fitting part, and from the shaft 1 (or the cylindrical member 4) to the cylindrical member 4 (or the shaft 1) When the torque transmitted to the motor changes, the above-mentioned gap may cause undesirable vibrations and noise to be generated at the same time as an impact is applied.

Therefore, in order to solve the above problem, as shown in FIGS. 3 and 4, a hole 8 is provided in one side of the bearing block 3, and an elastic member 9 is inserted into the hole 8. Pressing the pin 2 and the side surface of the groove 5 of the cylindrical member 4,
There is one in which the other side of the bearing block 3 is pressed against the other side of the groove 5.

However, in the structure provided with the elastic member 9, the dimensions of the elastic member are relatively small, so in order to obtain the target pressing force, it is necessary to increase the spring constant in the longitudinal direction of the elastic member. 2 and the side surface of the groove 5 of the cylindrical member 4 is a barrack, and the pressing force (elastic force) of the elastic member 9 is large.

Therefore, the pressing force (elastic force) may be too large, and in this case, the workability of assembling the bearing block 3 into the groove 5 deteriorates, and the surface pressure between the groove side of the cylindrical member 4 and the elastic member 9 increases. A problem occurred in that the bearing block 3 could no longer slide smoothly within the groove 5.

The present invention solves the above problems and consists of a shaft, a pin protruding from the end of the coaxial in a direction substantially perpendicular to the axis, a bearing block that fits into the pin, and a cylindrical shape into which the end of the coaxial fits inside. In a universal joint formed from a member and a notch provided in the inner wall of the cylindrical member, extending parallel to the central axis of the cylindrical member and slidably fitting the bearing block, both sides of the notch providing a through hole in the bearing block that is open to the surface and whose axis is substantially perpendicular to the pin; inserting an elastic member longer than the length of the through hole into the through hole; The gist is a universal joint for vibration and noise prevention, characterized in that both ends of the elastic member are arranged so as to elastically contact the sides of the notch,
The elastic member prevents vibration and noise generated between the bearing block and both side surfaces forming the groove of the cylindrical member, and since the elastic member is long, the spring constant can be lowered, and the bearing Even if the gap between the block and the side surface of the notch varies, there is little variation in the elastic force of the elastic member.

Therefore, the range of variation in elastic force is small and stable, making it easier to assemble the bearing block into the notch, and also allowing the bearing block to slide smoothly inside the notch. It has the effect of becoming

An embodiment of the present invention will be described with reference to FIGS. 5 to 7.

Note that parts or portions that are substantially the same as those of the conventional device are designated by the same reference numerals, and explanations thereof will be omitted.

10 is a through hole bored in the bearing block 3;
It is provided so as to have a gap with the pin 2 and to extend in a direction substantially perpendicular to the axis of the pin 2.

Numeral 11 is an elastic member that is inserted into the through hole 10 and is longer than the length of the through hole 10. The elastic member 11 is inserted into the through hole 10, and the bearing block 3 is assembled into the groove 5. When the elastic member 11 is compressed, the elastic member 11 is press-fitted into the through hole 10 of the bearing block 3, and both ends of the elastic member 11 are pressed against the side surfaces of the groove 5 of the cylindrical member 4. It looks like this.

According to the above structure, since the elastic member 11 is compressed to maintain elasticity between both sides of the groove 5 of the cylindrical member 4, the bearing block 3 and the groove 5 of the cylindrical member 4 are compressed. Shaft 1 (or cylindrical member 4)
This has the effect of being able to prevent vibrations and noise from occurring when the torque transmitted from the shaft to the cylindrical member 4 (or shaft 1) fluctuates.

In addition, since the elastic member 11 can be made longer in size than the conventional elastic member 9, the spring constant of the elastic member 11 can be lowered, and even if the gap between the bearing block 3 and the groove 5 of the cylindrical member 4 varies, the elastic member 11 Variations in elastic force are reduced.

Therefore, the range of variation in the elastic force is small and stable, making it easier to assemble the bearing block 3 into the groove 5, and also allowing the bearing block 3 to slide smoothly within the groove 5. play.

In the above embodiment, one through hole is provided in the bearing block 3, the elastic member 11 is inserted into the hole, and the elastic member is attached so as to press against both sides of the groove 5 of the cylindrical member 4. However, the number of holes is not limited to one location, and a plurality of holes may be provided, and elastic members may be attached to each of the plurality of holes.

[Brief explanation of drawings]

Figures 1 and 3 are longitudinal side views showing conventional pot joints, Figure 2 is a sectional view taken along line II-II in Figure 1, and Figure 4 is a cross-sectional view taken along line IV-IV in Figure 3. Figure, 5th
The figure is a vertical side view showing one embodiment of the present invention, and FIG.
A sectional view taken along the VI-VI line in the figure, FIG. 7 is Vl in FIG.
FIG. 3 is a cross-sectional view taken along the l-Vll line. 1: shaft, 2: pin, 3: bearing block, 4: cylindrical member, 10: through hole, 11: elastic member.

Claims (1)

[Scope of utility model registration request] A shaft, a pin protruding from the end of the coaxial in a direction substantially perpendicular to the axis, a bearing block that fits into the pin, a cylindrical member into which the end of the coaxial is fitted, and a pin provided on the inner wall of the cylindrical member. and a notch extending parallel to the central axis of the cylindrical member and into which the bearing block is slidably fitted; A through hole is provided in the bearing block so that the axis is substantially perpendicular to the pin, and an elastic member longer than the length of the through hole is inserted into the through hole, so that both ends of the elastic member are connected to the sides of the notch. A flexible cutter for vibration and noise prevention characterized by being structured so that it comes into contact with elasticity.