JPH04105652U - propeller shaft - Google Patents

Abstract

(57) [Summary] [Purpose] To obtain flexibility in the procedure for assembling a vibration isolator to a propeller shaft and to facilitate tuning work. [Configuration] The size of the mounting hole 31A of the vibration isolator 30 attached to the yoke 22 of the universal joint 20 is
It is sized to allow the flange yoke 21 of the universal joint 20 to pass through.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

In the present invention, the second yoke member is attached to the first yoke member attached to the end of the shaft. The vibration isolator that is connected and has a mounting hole formed in the center is aligned in the axial direction of the shaft. The present invention relates to a propeller shaft that is attached to a predetermined position.

0002

[Conventional technology]

Conventionally, this type of propeller shaft was disclosed in Japanese Utility Model Application Publication No. 63-25849. There are things listed.

0003 Such a propeller shaft has a structure on the outer peripheral surface of the shaft and on the inner peripheral surface side of the vibration isolator. It is designed to fit an elastic body or ball bearing.

0004

[Problem that the idea aims to solve]

By the way, in the case of the above-mentioned conventional propeller shaft, on the inner circumferential side of the vibration isolator The inner diameter of the elastic body or ball bearing is relatively small to match the outer diameter of the shaft. It is being cut out.

[0005] Therefore, when assembling the propeller shaft, various design considerations such as connection strength must be considered. When designing joints such as universal joints, which are relatively large due to The vibration isolator must be fitted onto the shaft before it is connected to the end of the shaft. Must be. This is because the yoke members that make up the joint are exposed to the vibration isolator. It is impossible to install a vibration isolator because it does not pass through the inside of the elastic body or ball bearing. This is because.

[0006] In this way, with conventional propeller shafts, the order in which the vibration isolators are assembled is regulated. This restricts the assembly procedure of the propeller shaft and makes it difficult to tune it. The problem was that it could not be done enough.

[0007] The purpose of this invention is to solve the above-mentioned conventional problems and to provide flexibility in the order in which vibration isolators are assembled. Providing a propeller shaft that can be obtained and easily perform tuning work. There are many things.

[0008]

[Means to solve the problem]

The propeller shaft of the present invention has a first yoke member attached to the end of the shaft. A vibration isolator is connected to the second yoke member and has a mounting hole formed in the center of the vibration isolator. In a propeller shaft that is installed at a predetermined position from the axial direction of the shaft, the above-mentioned The mounting hole of the vibration isolator is formed to have a size that allows at least the second yoke member to pass therethrough. It is characterized by the presence of

[0009]

[Effect]

In the present invention, a second yoke member is attached to the first yoke member attached to the end of the shaft. A vibration isolator installed at a predetermined position on the propeller shaft to which the The size of the central mounting hole is at least large enough for the second yoke member to pass through. , when assembling the propeller shaft, the order of assembling the vibration isolator and the second yoke member. becomes free.

0010 This allows for greater flexibility in the propeller shaft assembly procedure for tuning work. easily.

[0011]

【Example】

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

0012 The propeller shaft 1 of this embodiment is located at the rear from the transmission of an automobile. It transmits power to the front final reduction gear, as shown in schematic diagram 1. In this configuration, universal joints 10 and 20 are connected to both ends of the shaft 2. It becomes. Each of the universal joints 10 has a bifurcated shape. A pair of yokes 11 and 12 are connected by a cross-shaped journal 13. One yoke 11 (first yoke member) is attached to the shaft 2. The other yoke 12 (second yoke member) has a spline groove formed inside. It is a sleeve yoke having a sleeve 14 formed in the same manner. the other universe Similarly, the joint 20 has a pair of yokes 21 each having a forked shape. and 22 are connected by a cross-shaped journal 23. stop One yoke 21 (second yoke member) of this universal joint 20 is a flange yoke having a flange 24, and the other yoke 22 (first yoke member) is attached to the shaft 2.

[0013] FIG. 2 is an enlarged half-sectional view showing a specific configuration of the circle part II in FIG. 1. FIG. Figure 2 Smell 21A is a connection mounting hole drilled at the forked tip of the flange yoke 21. A bottomed cylindrical bearing race 25 is fitted into this mounting hole 21A. Ru. The open end edge of this bearing race 25 has a bent portion bent inward. 25A is formed. 26 is a knee disposed inside the bearing race 25. It is a dollar bearing and supports the shaft portion of the cross-shaped journal 23. 27 is Ji This seal member 27 is press-fitted into the shaft portion of the journal 5. A lubricant such as grease filled inside the bearing race 25 is sealed. Note that the shaft portion of the journal 5 is similarly connected to the forked tip of the yoke 22. It is.

[0014] 30 is a vibration isolator, and a hub 31 located on the inner periphery of the vibration isolator is connected to the outside of the yoke 22. After being press-fitted into the peripheral portion 22A, it is fixed by welding. Center of hub 31 A penetrating mounting hole 31A is formed in the mounting hole 31A as shown in FIG. It has a cross-sectional shape like that, and the universal joint 20 is connected to the propeller shaft. Similar to the maximum cross-sectional shape when taken in a direction perpendicular to the axis of 1, and its unit Passing the universal joint 20 from a direction substantially along the axis of the propeller shaft 1 It is large enough to be used. In the case of this embodiment, the flange yoke 21 is It has the largest cross-sectional shape in the versal joint 20. 32 and 33 are Go It is an annular elastic body made of rubber, and has inner and outer sleeves 34A, 34B and 35, respectively. A and 35B are vulcanized and bonded, and the outer sleeves 34B and 35B are These are press-fitted into the left and right inner circumferences of a metal vibrating ring 36 with a T-shaped cross section. Ru. In addition, a resin bearing 37 is press-fitted into the inner peripheral part of the center of the vibration ring 36. There is. Then, press fit the hub 31 into the inner sleeves 34A and 35A. This constitutes the vibration isolator 30.

[0015] Note that there is a small amount of dirt (not shown) between the inner circumference of the bearing 37 and the outer circumference of the hub 31. A gap is formed. Further, S1 is the volume of a predetermined portion of the elastic bodies 32 and 33. A space with a concave cross section, S2, is provided by metal contact between both the ring 36 and the hub 31. The space S3 is a space that allows the vibration ring 36 to vibrate when it resonates. It is a space for Also, S4 is formed when molding the elastic bodies 32 and 33. It is a space with a concave cross section.

[0016] Next, the effect will be explained.

[0017] The power transmitted from the car engine to the transmission is transmitted through the propeller shaft. In the power transmission path that is transmitted to the rear or front final reduction gear via The vibration transmitted from the engine to the propeller shaft 1 is absorbed by the vibration isolator 30. vibration to the final reduction gear is cut off.

[0018] That is, in the vibration isolator 30, the vibration ring 36 is Because it is supported on the outer circumference of the hub 31, the torsion applied to the propeller shaft 1 is When the input resonates with the natural frequency of the vibration isolator 30, the vibration ring 36 is activated by the propeller. The shaft 1 swings in the rotational direction and counter-rotation direction to absorb vibrations. At this time, a minute gap between the resin bearing 37 and the hub 31 causes the vibration ring 36 to Allow for runout. Also, when the propeller shaft 1 rotates at high speed, the elastic body 33 and 34 are compressed outward by centrifugal force, so that the resin bearing 37 and the hub 3 1, the gap between them disappears and they come into contact, and the entire vibration isolator 30 Rotates together with foot 1.

[0019] Therefore, the effective range of the control action of the vibration isolator 30 is the low speed rotation range, and the low speed In the rotation range, the gap between the resin bearing 37 and the hub 31 is maintained, resulting in the above-mentioned This will provide a damping effect during resonance. In addition, the resin bearing 37 , when resonating with the torsional input applied to the propeller shaft 1, the slurry with the hub 31 The strut functions to perform the idle function and also to prevent eccentricity of the vibration ring 6 in the high speed rotation range. It also functions as a wrapper. In addition, the space S1 is designed by reducing the volume of the rubber 8C and To make the vibration ring 36 easier to swing.

[0020] By the way, in the vibration isolator 30, the mounting hole 31A of the hub 31 constituting the inside thereof is flat. Because it is large enough to pass through the flange yoke 21, the vibration isolator 30 and flange yoke The following two ways can be freely selected as the order in which the blocks 21 are assembled.

[0021] When the yoke 22 is assembled to the shaft 2, first the yoke 22 is assembled to the shaft 2. The vibration isolator 30 is attached to the outer peripheral portion 22A of the yoke 22, and then the journal 23 is attached to the yoke 22. The flange yoke 21 is connected via the flange yoke 21.

[0022] When the yoke 22 is assembled to the shaft 2, first the yoke 22 is assembled to the shaft 2. The flange yoke 21 is connected via the journal 23 to the vibration isolator 30. Pass the flange yoke 21 through the mounting hole 31A of the flange yoke 21 in Then, the vibration isolator 30 is assembled to the outer peripheral portion 22A of the yoke 22.

[0023] In addition, in this embodiment, the vibration isolator 30 is attached to the universal joint 20. Since it is assembled near the joint, the weight increase due to the vibration isolator 30 increases. This will minimize the decrease in the primary bending eigenvalue of the propeller shaft 1. .

[0024] Also, the universal joint 10 on the other end side of the propeller shaft 1 (see Figure 1) ), the yoke 11 is provided with an outer periphery similar to the outer periphery 22 of the yoke 22. Therefore, it is possible to assemble the vibration isolator 30 to either the yoke 11 or 22. becomes.

[0025] Also, the shaft 2 is divided into two parts, a first shaft and a second shaft, which are divided into a third shaft. In the case of propeller shafts connected by universal joints, , a vibration isolator 30 is also provided for the yoke that constitutes the third universal joint. It is possible to assemble the In this case, the mounting hole 31 in the vibration isolator 30 The size of A is the entire universal joint 10 or the universal joint It should be large enough to allow the entire port 20 to pass through.

[0026] In addition, in the above embodiment, a vibration isolator is installed on the yoke that constitutes the universal joint. 30, but as shown by the two-dot chain line in Figure 1, the shaft It is also possible to configure the vibration isolating device 30 to be attached to the outer circumferential portion of 2. this place In this case, a vibration isolator 30 similar to the outer circumference 22 of the yoke 22 is provided on the outer circumference of the shaft 2. The size of the mounting hole 31A in the vibration isolator 30 is adjusted to the universal Passing through the entire monkey joint 10 or the entire universal joint 20 It should be of a size that allows for. Also, shaft 2 is connected to the first and second shafts. It is like being divided into two parts and connected by a third universal joint. In the case of a propeller shaft, a vibration isolator is installed on the outer periphery of the first or second shaft. All you have to do is assemble the

[0027]

[Effect of the idea]

As explained above, the present invention provides a first yoke portion attached to the end of the shaft. at a predetermined position on the propeller shaft to which the second yoke member is connected. The size of the mounting hole in the center of the vibration isolator to be mounted is at least as large as that of the second yoke part. Because the material is large enough to pass through, when assembling the propeller shaft, the vibration isolator and second The order of assembly with the yoke member can be freely changed.

[0028] As a result, you have more freedom in the propeller shaft assembly procedure and tuning work. It can be done easily.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention.

FIG. 2 is an enlarged half-sectional view of circle II in FIG. 1;

FIG. 3 is a view taken along arrow III of the vibration isolator shown in FIG. 2;

FIG. 4 is a sectional view taken along line IV-IV in FIG. 3;

5 is a view of only the hub of the vibration isolator shown in FIG. 2 in the direction of arrow III;

6 is a view taken along arrow III of the universal joint shown in FIG. 2; FIG.

[Explanation of symbols]

1 propeller shaft 2 shaft 10,20 universal joint 11, 22 Yoke (first yoke member) 12 Sleeve yoke (second yoke member) 21 Flange yoke (second yoke member) 30 Vibration isolator 31A mounting hole

Claims (1)

[Scope of utility model registration request] 1. A second yoke member is connected to a first yoke member attached to an end of the shaft, and a vibration isolator having a mounting hole formed in the center is attached to a predetermined position from the axial direction of the shaft. A propeller shaft, wherein the attachment hole of the vibration isolator is formed in a size that allows at least the second yoke member to pass therethrough.