JP2020046059A - Support mechanism and constant velocity universal joint - Google Patents

Abstract

To provide a support mechanism that can prevent propagation of vibration, and to provide a constant velocity universal joint.SOLUTION: A support mechanism 1 includes: a bracket 5 for supporting an outside joint member 3 of a constant velocity universal joint 2; a fixing part 7 for fixing the bracket 5 to a support structure 6; and buffer members 9a, 9b fixed to the fixing part 7 by a fastening member 8. The buffer members 9a, 9b are fixed between the fixing part 7 and the support structure 6 via the fastening member 8.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a support mechanism for supporting a constant velocity universal joint and a constant velocity universal joint including the support mechanism.

  A constant velocity universal joint that constitutes a power transmission system of automobiles and various industrial machines couples two shafts on a driving side and a driven side so that torque can be transmitted, and transmits rotational torque at a constant speed even when the two shafts have an operating angle. can do. Constant velocity universal joints are broadly classified into fixed type constant velocity universal joints that allow only angular displacement and sliding type constant velocity universal joints that allow both angular displacement and axial displacement. In a drive shaft for transmitting power from an automobile engine to drive wheels, a sliding constant velocity universal joint is used on a differential device side (inboard side), and a fixed type universal joint is used on a drive wheel side (outboard side). A speed universal joint is used.

  As an example, Patent Literature 1 discloses a roller that includes an outer joint member (tulip shaft) and an inner joint member (tripod shaft) and that is supported by a trunnion of the inner joint member via a needle bearing. Discloses a sliding type constant velocity universal joint (tripod type constant velocity universal joint) which is engaged with a roller groove formed in a cup portion (tulip portion).

  In the tripod type constant velocity universal joint, since there is a gap between the roller and the roller groove, there is a possibility that an unusual noise (play rattle) due to the collision between the roller and the roller groove may be generated when receiving an impact. is there. In the constant velocity universal joint disclosed in Patent Literature 1, an ear portion for urging the roller is provided on the needle retainer of the needle bearing, and the roller is brought into contact with the roller groove by the ear portion to prevent rattling noise. .

Japanese Utility Model Publication No. 55-68724

  By the way, in the sliding type constant velocity universal joint, there is a case where an outer joint member having a long shaft portion (long stem portion) is used. In this case, in order to secure a stable operation, the outer joint member is supported by a support structure such as an engine case via a support mechanism as an intermediate support portion including a bearing and a bracket.

  When such a support structure is employed, the vibration of the engine is directly transmitted to the constant velocity universal joint through the support mechanism. In the sliding type constant velocity universal joint, there is also a circumferential play (gap) between the roller groove of the outer joint member and the roller of the inner joint member, so the structure of the constant velocity universal joint according to Patent Document 1 This alone cannot prevent rattling noise.

  The present invention has been made in view of the above circumstances, and has as its object to provide a support mechanism capable of preventing propagation of vibration and a constant velocity universal joint including the support mechanism.

  The present invention is to solve the above-mentioned problem, and in a support mechanism for fixing a constant velocity universal joint including a joint member to a support structure, a bracket for supporting the joint member, and the bracket for supporting the joint member. And a cushioning member fixed to the fixing portion.

  According to this configuration, the vibration generated in the support structure such as the engine is reduced by the cushioning member provided in the fixed portion, so that the vibration hardly propagates to the joint member of the constant velocity universal joint supported by the bracket. Become. Thereby, generation of rattling noise in the constant velocity universal joint can be effectively prevented.

  The support mechanism having the above configuration may include a fastening member that fixes the fixing portion to the support structure, and the buffer member is fixed between the fixing portion and the support structure via the fastening member. May be done. Thereby, the cushioning member comes into contact with the support structure, so that the vibration generated in the support structure can be reduced, and the vibration can be prevented from propagating to the fixed portion.

  The fastening member may be a bolt having a head and a shaft, and the cushioning member may be fixed between the head and the fixing portion. This can prevent the vibration generated in the support structure from propagating to the fixing portion through the fastening member.

  The buffer member may be configured to be elastically deformable by rubber or resin. Thereby, the vibration generated in the support structure can be absorbed by the elastic deformation of the cushioning member.

  A constant velocity universal joint according to the present invention includes any one of the support mechanisms described above and the joint member supported by the support mechanism. This makes it difficult for the vibration generated in the support structure to propagate to the joint member, and effectively prevents rattling noise in the constant velocity universal joint.

  ADVANTAGE OF THE INVENTION According to this invention, propagation of vibration to a constant velocity universal joint can be prevented.

It is a perspective view of a support mechanism and a constant velocity universal joint. It is an exploded perspective view of a support mechanism.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. 1 and 2 show one embodiment of a support mechanism and a constant velocity universal joint according to the present invention.

  The support mechanism according to the present invention is configured as an intermediate support portion that fixes a constant velocity universal joint to a support structure and supports a middle part of the constant velocity universal joint. In the present embodiment, a support mechanism for fixing a sliding constant velocity universal joint used for an automobile to a support structure such as an engine case is illustrated, but the present invention is not limited to this configuration.

  As shown in FIG. 1, the support mechanism 1 includes a bearing 4 that rotatably supports a joint member 3 of the constant velocity universal joint 2, a bracket 5 (support portion) that supports the bearing 4, and a support structure 6. The vehicle includes a fixing portion 7 to be fixed, a fastening member 8 for fixing the fixing portion 7 to the support structure 6, and buffer members 9 a and 9 b attached to the fixing portion 7 via the fastening member 8.

  The joint member 3 of the constant velocity universal joint 2 is an outer joint member including a long stem portion 10 and a cup portion 11 formed at one end of the long stem portion 10. The length of the long stem portion 10 varies depending on the type of vehicle, but is generally 300 to 400 mm. The long stem portion 10 has a mounting portion 12 attached to the support mechanism 1 in the middle thereof. A roller groove is formed inside the cup portion 11. A roller supported by the trunnion of the inner joint member is fitted into the roller groove of the cup portion 11.

  The bearing 4 is constituted by a ball bearing or other rolling bearings. The bearing 4 includes an inner ring fixed to the mounting portion 12 of the long stem portion 10 of the joint member 3, an outer ring fixed to the bracket 5, a rolling surface formed on an outer diameter surface of the inner ring, and an inner diameter surface of the outer ring. And a ball as a rolling element disposed between the rolling surface and the rolling surface to be formed.

  As shown in FIGS. 1 and 2, the bracket 5 is formed in an annular shape so as to accommodate the outer ring of the bearing 4. The bracket 5 has a support surface 13 (see FIG. 2) on the inner side of which the outer ring of the bearing 4 is fixed.

  The fixing portion 7 is formed in a plate shape and is formed integrally with the bracket 5. The fixing portion 7 includes a first surface 14 facing the support structure 6, a second surface 15 located on the opposite side of the first surface 14 in the thickness direction, and a second surface 15 from the first surface 14. And a plurality of (three in this example) through holes 16 formed through the surface 15 (see FIG. 2). Each through-hole 16 penetrates the fixing portion 7 along a direction (for example, a perpendicular direction) intersecting the axial direction of the joint member 3 (long stem portion 10) supported by the bracket 5. Note that a rib 17 is integrally formed between the fixing portion 7 and the bracket 5.

  As the fastening member 8, for example, a bolt is used. The fastening member 8 has a head 18 and a shaft 19. The head 18 is configured to be larger than the through hole 16 of the fixing part 7. The shaft portion 19 has a male screw portion, and has a diameter that can be inserted into the through hole 16 of the fixing portion 7.

  The support structure 6 has a base portion 20 and a plurality of support portions 21 protruding from the base portion 20 and to which the support mechanism 1 is attached. The support portion 21 is configured in a columnar or cylindrical shape, but is not limited to this configuration. The support portion 21 protrudes from the base portion 20 along a direction (for example, an orthogonal direction) intersecting the axial direction of the joint member 3 (long stem portion 10) supported by the bracket 5. As shown in FIG. 2, the support portion 21 has a screw hole 22 into which the shaft portion 19 of the fastening member 8 fits.

  The support mechanism 1 aligns the through hole 16 of the fixing portion 7 with the screw hole 22 of the support portion 21 of the support structure 6, inserts the shaft portion 19 of the fastening member 8 into the through hole 16, and inserts the screw hole 22 into the screw hole 22. It is fixed to the support structure 6 by screwing.

  The buffer members 9a and 9b are formed in a disk shape by an elastic member, for example, rubber or resin. The buffer members 9a and 9b have a circular hole 23 at the center thereof (see FIG. 2). The shaft portion 19 of the fastening member 8 can be inserted into the hole 23.

  The buffer members 9a and 9b are provided with a first buffer member 9a disposed between the fixing portion 7 and the support structure 6, and a second buffer member disposed between the head portion 18 of the fastening member 8 and the fixing portion 7. Member 9b. However, the invention is not limited thereto, and the support mechanism 1 may include only the first buffer member 9a or may include only the second buffer member 9b.

  The first cushioning member 9 a is arranged between the first surface 14 of the fixing part 7 and the end face of the support part 21 of the support structure 6. Specifically, the shaft portion 19 of the fastening member 8 is inserted into the hole 23 of the first cushioning member 9a, and the fastening member 8 is fastened as described above. And is fixed in a state of being sandwiched between the end surface of the fixing portion 7 and the first surface 14 of the fixing portion 7.

  The second cushioning member 9 b is disposed between the second surface 15 of the fixing part 7 and the head 18 of the fastening member 8. Specifically, the shaft portion 19 of the fastening member 8 is inserted into the hole 23 of the second buffer member 9b, and the fastening member 8 is fastened as described above. Is fixed in a state sandwiched between the second surface 15 and the head 18 of the fastening member 8.

  In the present embodiment, vibrations generated from a vibration source such as an engine of an automobile tend to propagate to the support mechanism 1 and the constant velocity universal joint 2 through the support structure 6. However, in the present embodiment, the propagation of the vibration from the support structure 6 to the fixing portion 7 is suppressed by the elastic deformation of the buffer members 9a and 9b fixed to the fixing portion 7 according to the vibration. . Therefore, the support mechanism 1 can prevent the propagation of vibration to the joint member 3 of the constant velocity universal joint 2. As a result, rattling noise in the constant velocity universal joint 2 can be effectively prevented.

  Further, the buffer members 9a and 9b are fixed to the fixing portion 7 by inserting the shaft portion 19 of the fastening member 8 into the hole 23, so that the buffer members 9a and 9b are not easily dropped from the fixing portion 7. Thereby, the support mechanism 1 can prevent the propagation of the vibration for a long time.

  Note that the present invention is not limited to the configuration of the above-described embodiment, nor is it limited to the above-described effects. The present invention can be variously modified without departing from the gist of the present invention.

  In the above embodiment, an example is shown in which one cushioning member 9a, 9b is arranged between the support structure 6 and the fixing portion 7 and between the fixing portion 7 and the fastening member 8, but the present invention is not limited thereto. Is not limited to this configuration. That is, a plurality of cushioning members 9a and 9b may be arranged so as to overlap between the support structure 6 and the fixing portion 7 and between the fastening member 8 of the fixing portion 7.

  In the above-described embodiment, the first buffer member 9a and the second buffer member 9b may have the same size and thickness, or may have different sizes. The buffer members 9a and 9b may use metal spring members, but are preferably made of rubber or resin as described above from the viewpoint of preventing abnormal noise.

DESCRIPTION OF SYMBOLS 1 Support mechanism 2 Constant velocity universal joint 3 Outer joint member 5 Bracket 6 Support structure 7 Fixed part 8 Fastening member 9a First buffer member 9b Second buffer member 18 Head 19 Shaft

Claims (5)

In a support mechanism for fixing a constant velocity universal joint including a joint member to a support structure,
A support mechanism comprising: a bracket for supporting the joint member; a fixing part for fixing the bracket to the support structure; and a buffer member fixed to the fixing part. A fastening member for fixing the fixing portion to the support structure,
The support mechanism according to claim 1, wherein the cushioning member is fixed between the fixing portion and the support structure via the fastening member. A fastening member for fixing the fixing portion to the support structure,
The fastening member is a bolt including a head and a shaft,
The support mechanism according to claim 1, wherein the cushioning member is fixed between the head and the fixing portion.   The support mechanism according to any one of claims 1 to 3, wherein the buffer member is configured to be elastically deformable by rubber or resin. A constant velocity universal joint comprising: the support mechanism according to claim 1; and the joint member supported by the support mechanism.

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