JP5030846B2 - Torsional vibration reduction device - Google Patents

Description

  The present invention relates to a device for reducing torsional vibrations, wherein the radial wear of the spacer is promoted while the axial wear is not promoted.

  Some automobiles use an automatic transmission, and a torsional vibration reducing device is used to prevent the torsional vibration caused by torque fluctuations of the engine from being transmitted to the automatic transmission.

  As a conventional torsional vibration reduction device, for example, a device described in Patent Document 1 is known. The inner periphery of a pair of input members (drive plate and side plate) is coupled to the crankshaft of the engine via bolts, and the outer periphery of an output member (driven plate) that is rotatably provided between the pair of input members The part is coupled to the converter cover of the torque converter, and the pair of input member and output member are coupled in the circumferential direction by a compression spring.

The pair of input members and the output member are centered via a bearing disposed between the pair of input members, and a pilot boss and a crankshaft provided integrally with the converter cover are centered via a pilot bush. . In other words, since the bearing and the pilot bush are made of a resin material having a small rigidity and easy to wear, even if the shaft centers of the input member and the output member are slightly shifted due to wear, the shaft center is formed. The deviation is absorbed.
Japanese Patent Laid-Open No. 08-28628

  However, if the bearing and the pilot bush are to function not only as a bearing but also as an axial resin spacer for positioning parts in the axial direction, the bearing and the pilot bushing are worn. Since it is comprised with the easy resin material, there exists a subject that the function of positioning cannot be performed by abrasion.

  In addition, in the serration portion as an uneven high surface pressure contact portion, the sliding area increases and the surface pressure decreases as the projection portion wears, so the wear speed decreases in the middle, and within a predetermined time. There is a problem that a fixed amount of wear is not performed.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-described problems and provide a torsional vibration reduction device in which wear of a resin spacer is accelerated in the radial direction but wear is not promoted in the axial direction.

The invention according to claim 1 includes an input member connected to the crankshaft, an output member connected to the input shaft of the transmission and provided in the axial direction next to the input member and centered by the input member, and the output In the torsional vibration reduction device comprising a member and an elastic member that connects the input member in the circumferential direction,
An outer peripheral surface forming portion that protrudes in the axial direction toward the input member and forms an outer peripheral surface is formed on the radially inner peripheral side of the output member, and a spacer is provided between the output member and the input member in the axial direction. A cylindrical portion protruding in the axial direction is formed on the spacer, and the cylindrical portion is interposed between the outer peripheral surface forming portion of the output member and the inner peripheral surface of the input member,
Alternatively, an inner peripheral surface forming portion that protrudes in the axial direction toward the input member to form an inner peripheral surface is formed on the outer peripheral side in the radial direction of the output member, and between the axial direction of the output member and the input member A spacer is formed on the spacer, and a cylindrical portion protruding in the axial direction is formed on the spacer, and the cylindrical portion is interposed between the outer peripheral surface of the input member and the inner peripheral surface forming portion of the output member. And
Of the inner peripheral surface and the outer peripheral surface of the tubular portion, a surface that slides with the input member or the output member is formed with a wear portion that is worn by sliding.

  According to this invention, the spacer exists between the axial direction of the relatively rotating input member and output member, and wear in the axial direction is small. On the other hand, in the radial direction, the cylindrical portion of the spacer is interposed between the outer peripheral surface forming portion of the output member and the inner peripheral surface of the input member, or between the outer peripheral surface of the input member and the inner peripheral surface forming portion of the output member. Since the wear part which wears by sliding is formed in the surface which slides with the input member or the output member of the inner peripheral surface and the outer peripheral surface of the cylindrical part, the wear in the radial direction is Promoted. Therefore, the centering between the input member and the output member that wants to promote wear and absorb the axial misalignment, and the axial position between the input member and the output member that do not want to change without promoting the wear in the axial direction. Opposition to positioning is performed.

  According to a second aspect of the present invention, in the torsional vibration reduction device according to the first aspect, the wear portion includes a plurality of sliding portions that slide with the input member or the output member intermittently in a circumferential direction. It is characterized by a high surface pressure.

  According to this invention, a plurality of sliding portions are intermittently formed in the circumferential direction on the surface that slides with the input member or the output member of the inner peripheral surface and the outer peripheral surface of the cylindrical portion of the spacer, and the output Since the wear portion is formed by increasing the surface pressure of the portion sliding with the member or the input member, wear of the wear portion is promoted. Therefore, even if the axial center of the input member and the output member is slightly shifted, the shift of the axial center can be absorbed.

  According to a third aspect of the present invention, in the torsional vibration reducing device according to the second aspect, the sliding portions are alternately formed on the inner peripheral surface and the outer peripheral surface of the cylindrical portion along the circumferential direction. It is characterized by that.

  According to the present invention, since the sliding portions are alternately formed along the circumferential direction on the inner peripheral surface and the outer peripheral surface of the cylindrical portion, the cylindrical portion of the spacer is easily bent in the radial direction and has an elastic property. . Therefore, in addition to absorbing the shift of the shaft center due to wear of the cylindrical portion of the spacer, the absorption of the shift of the shaft center due to bending is added, and the function of absorbing the shift of the shaft center is further enhanced. In addition, when one of the sliding parts formed in the inner peripheral surface and outer peripheral surface of a cylinder part does not slide with respect to an input member or an output member, it becomes a contact part.

  The invention according to claim 4 is the torsional vibration reduction device according to any one of claims 1 to 3, wherein either the input member or the output member is constituted by a pair of side plates, and the other is the pair of side plates. A center plate sandwiched between axial directions of side plates and relatively rotatable, and a pair of spacers is interposed between the pair of side plates and the central plate in the axial direction, and at least one of the pair of spacers On the other hand, the cylindrical portion is formed.

  According to the present invention, since either the input member or the output member is constituted by a pair of side plates, the spacers disposed between the input member and the output member in the axial direction are also a pair.

  According to the invention which concerns on Claim 1, the wear part which wears by sliding is formed in the surface which slides with the input member or the output member of the inner peripheral surface and outer peripheral surface of the cylinder part of a spacer. Therefore, wear in the radial direction is promoted. Therefore, the centering between the input member and the output member that wants to promote wear and absorb the axial misalignment, and the axial position between the input member and the output member that do not want to change without promoting the wear in the axial direction. It is possible to perform an operation opposite to the positioning.

  According to the invention of claim 2, a plurality of sliding portions are intermittently formed in the circumferential direction, the surface pressure of the portion sliding with the output member or the input member is increased, and the inside of the cylindrical portion of the spacer Since the wear portion is formed on the peripheral surface or the outer peripheral surface, wear of the wear portion is promoted. Therefore, even if the axial center of the input member and the output member is slightly shifted, the shift of the axial center can be absorbed.

  According to the invention of claim 3, since the sliding portions are alternately formed along the circumferential direction on the inner peripheral surface and the outer peripheral surface of the cylindrical portion, the cylindrical portion of the spacer is easily bent in the radial direction and has an elastic property. To have. Therefore, in addition to absorbing the shift of the shaft center due to wear of the cylindrical portion of the spacer, the absorption of the shift of the shaft center due to bending is added, and the function of absorbing the shift of the shaft center is further enhanced.

  According to the fourth aspect of the present invention, since either the input member or the output member is constituted by a pair of side plates, the spacers disposed between the input member and the output member in the axial direction are also a pair.

Embodiments of a torsional vibration reducing device according to the present invention will be described below.
(A) Embodiment 1
First, the first embodiment will be described.
(Constitution)
As shown in FIG. 2, a flywheel mass 1 is coupled to a crankshaft (not shown) of the engine, and the flywheel mass 1 has an outer periphery of a drive plate 2 and a side plate 3 as a pair of side plates as input members. The parts are connected via a rivet 4. On the other hand, a driven plate 5 is provided as a central plate which is an output member, and the driven plate 5 is disposed between the drive plate 2 and the side plate 3 so as to be relatively rotatable. The driven plate 5 is connected to an input shaft of a transmission (not shown) via an output hub 6 disposed inside the driven plate 5. The driven plate 5 and the output hub 6 are coupled via a plurality of rivets 7.

  The drive plate 2, the side plate 3, and the driven plate 5 are connected in the circumferential direction via springs 8 as elastic members. That is, it is configured as follows. Four windows 2a and 3a are respectively formed in the drive plate 2 and the side plate 3 along the circumferential direction, and spring receiving portions 2b and 3b are respectively formed in portions located between the windows 2a and 3a. Has been. On the other hand, a spring receiving portion 5b protruding outward in the radial direction is formed at a position corresponding to the spring receiving portions 2b and 3b in the circumferential direction of the driven plate 5, and thereby a notch is formed between the spring receiving portions 5b. Part 5a is formed. A pair of springs 8 is accommodated in the window 2a, the window 3a, and the notch 5a.

  Each of the pair of springs 8 includes a parent spring 8a having a large outer diameter and a child spring 8b having a small outer diameter, and the child spring 8b is accommodated inside the parent spring 8a. The pair of springs 8 are connected in the circumferential direction via a floating equalizer 9. The floating equalizer 9 includes a ring-shaped annular portion 9 a and a connecting portion 9 b that protrudes radially inward from the annular portion 9 a. The connecting portion 9 b is interposed between a pair of springs 8. .

  Resin spacers 10 are interposed between the drive plate 2 and the driven plate 5 and between the side plate 3 and the driven plate 5, respectively. The shape of the resin spacer 10 is shown in FIG. The resin spacer 10 includes a flange portion 10a having a shape in which a plate-like material is drawn out in an arc shape, and a cylindrical portion 10b protruding in the axial direction from the inner peripheral side of the flange portion 10a. A wear portion that is worn by sliding is formed on the inner peripheral surface of the cylindrical portion 10b. The wear portion is formed by intermittently forming a plurality of sliding portions 10d having a sliding surface 10c that slides with an outer peripheral surface 6a, which will be described later, in the circumferential direction to increase the surface pressure with the outer peripheral surface 6a. .

  Next, the output hub 6 coupled to the radially inner peripheral side of the driven plate 5 functions as an outer peripheral surface forming portion protruding in the axial direction of the driven plate 5. Between the outer peripheral surface 6 a of the output hub 6 and the inner peripheral surface 3 c of the side plate 3, one cylindrical portion 10 b of the pair of resin spacers 10 is interposed. In order to integrally rotate the pair of resin spacers 10 with the drive plate 2 and the side plate 3, the following configuration is provided. While the drive plate 2 and the side plate 3 are formed with four holes along the circumferential direction, the outer peripheral portion of the flange portion 10a of the resin spacer 10 is formed with four notches 10e from the outer peripheral side, Stopper bolts 11 are inserted through the notches 10e and the four holes, and both ends of the stopper bolts 11 are caulked. In order to avoid the stopper bolt 11 from interfering with the driven plate 5, the stopper bolt 11 is positioned on the inner peripheral side of the notch 5 a formed on the outer peripheral portion of the driven plate 5 as shown in FIG. is doing.

In this embodiment, since the resin spacer 10 rotates integrally with the drive plate 2 and the side plate 3, the inner peripheral surface of the cylindrical portion 10 b becomes a surface that slides with the outer peripheral surface 6 a of the output hub 6. A wear part is formed. As shown in FIG. 3A, the wear portion is formed by intermittently forming a plurality of sliding portions 10d having a sliding surface 10c that slides on the outer peripheral surface 6a of the output hub 6 in the circumferential direction. Has been. By forming the sliding portion 10d intermittently along the circumferential direction, the surface pressure with the outer peripheral surface 6a of the output hub 6 is increased, and the wear of the sliding portion 10d is promoted. .
(Function)
Next, the operation of the torsional vibration reducing device will be described.

  The rotation of the engine is transmitted to the drive plate 2 and the side plate 3 through the crankshaft and the flywheel mass 1, and is transmitted from the drive plate 2 and the side plate 3 to the driven plate 5 through the spring 8. Then, it is transmitted from the driven plate 5 to the converter cover of the torque converter (not shown) via the output hub 6. Since the spring 8 is compressed, relative rotation is possible between the drive plate 2, the side plate 3 and the driven plate 5, so that torsional vibration is reduced.

  As shown in FIG. 1, resin spacers 10 exist between the driven plate 5 and the drive plate 2 and between the driven plate 5 and the side plate 3, and the drive plate 2, the driven plate 5, and the side plate 3. Relative positioning in the axial direction is performed. In addition, the presence of the resin spacer 10 avoids direct contact between the drive plate 2 and the side plate 3 and the driven plate 5 that rotate relatively, thereby preventing sound generation and wear due to direct contact. Since the driven plate 5 rotates relative to the resin spacer 10 that rotates integrally with the drive plate 2 and the side plate 3, the flange portion 10 a of the resin spacer 10 slides on the driven plate 5 in the axial direction. Wear.

  Next, the radial wear of the resin spacer 10 is as follows. The driven plate 5 is centered with respect to the side plate 3 via the cylindrical portion 10 b of the resin spacer 10. That is, the side plate 3 and the resin spacer 10 rotate integrally through the stopper bolt 11, and the output hub 6 integrated with the driven plate 5 with respect to the inner peripheral surface of the cylindrical portion 10 b of the resin spacer 10 on the right side in FIG. , The driven plate 5 rotates relative to the side plate 3 and the resin spacer 10.

  Here, since the sliding portion 10d is intermittently formed along the circumferential direction on the inner peripheral surface of the cylindrical portion 10b as shown in FIG. 3A, it slides on the outer peripheral surface 6a of the output hub 6. The surface pressure of the sliding surface 10c that moves is large. For this reason, the speed of wear of the sliding portion 10d is larger than that when the sliding surface 10c exists over the entire circumference. Therefore, in the radial direction of the resin spacer 10, the wear rate is faster than when the entire inner peripheral surface of the cylindrical portion 10b slides. For this reason, when the axial centers of the side plate 3 and the driven plate 5 are slightly shifted relative to each other, the sliding portion 10d is worn by use over time, and misalignment is absorbed.

  In other words, the resin spacer 10 can tolerate axial misalignment because the wear rate is accelerated in the radial direction, but the wear is not promoted in the axial direction, and the radial direction against the wear in the axial direction. It is possible to increase or decrease the rate of wear at. The increase / decrease in the wear rate can be adjusted by increasing / decreasing the circumferential length of the sliding portion 10d or increasing / decreasing the number of the sliding portions 10d. Further, as the resin spacer 10, it is preferable to use a material having a relatively high wear resistance so that axial wear is suppressed. For example, 66 nylon or the like is used.

  According to this invention, the resin spacer 10 exists between the axial direction of the drive plate 2, the side plate 3, and the driven plate 5 that rotate relatively, and wear in the axial direction is small. On the other hand, in the radial direction, the cylindrical portion 10 b of the resin spacer 10 is interposed between the outer peripheral surface 6 a of the output hub 6 coupled to the driven plate 5 and the inner peripheral surface 3 c of the side plate 3. Since the sliding portion 10d that is worn by sliding is formed on the inner circumferential surface of 10b and the surface that slides with the outer circumferential surface 6a of the output hub 6, wear in the radial direction is promoted. Therefore, the centering of the drive plate 2, the side plate 3 and the driven plate 5 that wants to promote wear and absorb the misalignment of the shaft center, and the shaft of the drive plate 2, the side plate 3 and the driven plate 5 without promoting wear. There is an effect opposite to the positioning in the axial direction in which the positional relationship of the direction is not desired to be changed.

  According to the present invention, a plurality of sliding portions 10d are intermittently formed in the circumferential direction on a surface that slides with the outer peripheral surface 6a of the output hub 6 on the inner peripheral surface of the cylindrical portion 10b of the resin spacer 10 for output. Since the wear portion is formed by increasing the surface pressure of the sliding portion with the outer peripheral surface 6a of the hub 6, the wear of the wear portion is promoted. Therefore, even if the shaft centers of the drive plate 2, the side plate 3, and the driven plate 5 are slightly shifted, the shift of the shaft center can be absorbed.

According to the present invention, since the input member is constituted by the drive plate 2 and the side plate 3 (a pair of side plates), the resin spacer disposed between the drive plate 2, the side plate 3 and the driven plate 5 in the axial direction. 10 is also a pair.
(B) Embodiment 2
Next, a second embodiment will be described. Since the second embodiment is obtained by changing a part of the first embodiment, only parts different from the first embodiment will be described.

  In FIG. 3 of the first embodiment, the sliding portion 10d is formed only on the inner peripheral surface of the cylindrical portion 10b. However, as shown in FIG. 4, the outer peripheral surface of the cylindrical portion 10b also slides with the inner peripheral surface 3c of the side plate 3. A plurality of sliding portions 10g having a sliding surface 10f that moves may be intermittently formed in the circumferential direction so that the sliding portions 10d and the sliding portions 10g are alternately arranged along the circumferential direction. . In this case, the stopper bolt 11 is not provided so that the sliding portion 10g and the inner peripheral surface 3c of the side plate 3 slide.

  According to the present invention, since the sliding portions 10d and the sliding portions 10g are alternately formed along the circumferential direction on the inner peripheral surface and the outer peripheral surface of the cylindrical portion 10b, the cylindrical portion 10b of the resin spacer 10 has a radius. It tends to bend in the direction and has an elastic property. Therefore, in addition to the absorption of the shift of the axial center due to the wear of the cylindrical portion 10b of the resin spacer 10, the absorption of the shift of the axial center due to the elastic property is added, and the function of absorbing the shift of the axial center is further enhanced. Note that the stopper bolt 11 may be provided so that the sliding portion 10g and the inner peripheral surface 3c of the side plate 3 that slides do not slide. In the case of a configuration that does not slide, the sliding portion 10g is a simple contact portion.

  In the first and second embodiments, the input member is constituted by a pair of side plates, while the output member is constituted by a central plate. However, the input member and the output member may be constituted by a single member. Further, the input member may be constituted by a central plate, while the output member may be constituted by a pair of side plates. Furthermore, although resin spacers are used as the spacers in the first and second embodiments, the present invention is not limited to resins, and other materials may be used. Furthermore, in the first and second embodiments, the case where the cylindrical portion of the resin spacer is disposed between the outer peripheral surface of the output hub as the outer peripheral surface forming portion and the inner peripheral surface of the side plate is shown. When the inner peripheral surface forming portion protruding in the axial direction is formed on the outer peripheral side in the direction, the cylindrical portion of the resin spacer is arranged between the outer peripheral surface of the side plate and the inner peripheral surface forming portion of the central plate. Furthermore, in the first and second embodiments, the outer peripheral surface of the output hub coupled to the central plate is used as the outer peripheral surface forming portion, but the outer peripheral surface forming portion protruding in the axial direction is integrally formed on the end surface of the central plate, An outer peripheral surface may be used. In the first and second embodiments, only one of the pair of resin spacers slides on the outer peripheral surface of the output hub, but both may slide. Furthermore, in the first embodiment, the inner peripheral surface of the cylindrical portion is a sliding surface, and in the first and second embodiments, the inner peripheral surface and the outer peripheral surface of the cylindrical portion are sliding surfaces. Although the portion is formed, the wear portion may be formed only on the outer peripheral surface with only the outer peripheral surface of the cylindrical portion sliding. Furthermore, the wear part is not limited to the structure in which the contact part is intermittently formed in the circumferential direction, and other materials that are easily worn may be attached.

Sectional drawing which shows the principal part of a torsional vibration reduction apparatus (Embodiment 1). FIG. 5A is a front view showing a torsional vibration reduction device with a part of a drive plate removed, and FIG. 5B is a sectional view taken along the line A-O-A in FIG. (A) is a front view, (b) is a sectional view (Embodiment 1). (A) is a front view, (b) is a sectional view (Embodiment 2).

Explanation of symbols

2 ... Drive plate (side plate, input member)
3. Side plate (side plate, input member)
3c ... inner peripheral surface 5 ... driven plate (center plate, output member)
6. Output hub (outer peripheral surface forming part)
6a ... outer peripheral surface 8 ... spring (elastic member)
10 ... Resin spacer (spacer)
10b ... Cylinder part 10c ... Sliding surface 10d ... Sliding part (wear part)
11 ... Stopper bolt

Claims (4)

An input member connected to the crankshaft, an output member connected to the input shaft of the transmission and centered by the input member adjacent to the input member in the axial direction, and the output member and the input member In the torsional vibration reduction device provided with an elastic member connected in the circumferential direction,
An outer peripheral surface forming portion that protrudes in the axial direction toward the input member and forms an outer peripheral surface is formed on the radially inner peripheral side of the output member, and a spacer is provided between the output member and the input member in the axial direction. A cylindrical portion protruding in the axial direction is formed on the spacer, and the cylindrical portion is interposed between the outer peripheral surface forming portion of the output member and the inner peripheral surface of the input member,
Alternatively, an inner peripheral surface forming portion that protrudes in the axial direction toward the input member to form an inner peripheral surface is formed on the outer peripheral side in the radial direction of the output member, and between the axial direction of the output member and the input member A spacer is formed on the spacer, and a cylindrical portion protruding in the axial direction is formed on the spacer, and the cylindrical portion is interposed between the outer peripheral surface of the input member and the inner peripheral surface forming portion of the output member. And
A torsional vibration reducing device characterized in that a wear portion that wears by sliding is formed on a surface that slides with the input member or the output member of the inner peripheral surface and the outer peripheral surface of the cylindrical portion. . The torsional vibration reducing device according to claim 1,
The torsional vibration reducing device, wherein the wear portion is configured such that a plurality of sliding portions sliding with the input member or the output member are intermittently formed in a circumferential direction, and the surface pressure is high. The torsional vibration reduction device according to claim 2,
The torsional vibration reducing device according to claim 1, wherein the sliding portions are alternately formed along an inner circumferential surface and an outer circumferential surface of the cylindrical portion along a circumferential direction. In the torsional vibration reducing device according to any one of claims 1 to 3,
Either one of the input member and the output member is constituted by a pair of side plates, and the other is constituted by a central plate that is sandwiched between the axial directions of the pair of side plates and is relatively rotatable. A torsional vibration reduction device, wherein a pair of the spacers are interposed between the central plate and the central plate, and the cylindrical portion is formed on at least one of the pair of spacers.

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