JP5346083B2 - Engagement ring for gear ratio engagement in planetary gear sets - Google Patents

Description

  The invention relates to an engagement ring for the engagement of a gear in a planetary gear set via an engagement sleeve, according to the preamble of claim 1. In particular, the present invention is intended to be a device for reducing noise arising from applications where the application is found in relation to automobiles, in particular planetary gear sets.

  Automobile transmission gear boxes typically have an input rotation shaft and an output rotation shaft. Its main purpose is the transmission of rotation with the possibility of selecting various rotating gear ratios between the input and output shafts.

  U.S. Pat. No. 6,057,071 discloses an example of a two-gear synchronous gear arrangement in a planetary gearing type range gear box, in which synchronization for each gear is via an engagement ring, a friction surface. A synchronization ring cooperating with the engagement ring, which is axially displaceable and arranged to rotate with an axially displaceable engagement sleeve, and a spring suspension element in the form of a garter spring Consists of. In this example of a synchronization device, a first engagement ring is fixedly connected to the range gear housing and a second engagement ring is fixedly connected to the output shaft of the range gear box. In another known range gear, a second engagement ring can alternatively be arranged to connect the engagement sleeve to the input shaft of the range gear. This means that the synchronization device can be divided and placed on both sides of the ring gear of the planetary gear set. In the example described through the document US Pat. No. 6,057,059, the entire synchronization device is provided on one side of the ring gear of the planetary gear set, and the ring gear is fixed to the engagement sleeve. The purpose of the garter spring is to transmit the supporting force from the ring gear to one of the synchronization rings during synchronization and shifting by cooperating with a recess in the engagement sleeve. During a shift, for example during a shift from a low range position (large gear ratio) to a high range position (high gear to low gear gear ratio is usually 1: 1), the ring gear is connected to the output shaft. Before it can be locked or engaged with it, its rotational rate must be adjusted relative to the rotational rate of the output shaft. This means that the supporting force is applied axially to the engagement sleeve towards the synchronization ring for the high range, i.e. the synchronization ring to adjust the rotation of the ring gear with respect to the rotation rate of the output shaft. Achieved by facts.

  When rotation speed synchronization is achieved, the engagement sleeve can be displaced axially at this point to engage the high range engagement ring, which rotates with the output shaft. The fact that they are connected locks the ring gear / engagement sleeve with the output shaft. The transmission bars provided on both synchronization rings ensure that they always rotate with the engagement sleeve, even when the ring gear is axially displaced with respect to each synchronization ring. During synchronization and shifting, each garter spring transmits support force from the ring gear to each synchronization ring via cooperation with a recess in the ring gear.

  When the low range is engaged, the engagement sleeve is connected to the range gear housing via the first engagement ring. When the planetary gear set is rotating, the meshing of the gear wheel teeth in the range gear can cause vibrations. These vibrations are transmitted to the range gear housing when the low range gear is engaged. In the worst case, the entire range gear box can act as a resonance box, thus amplifying vibrations and transmitting them to the surrounding air, creating noise for the environment. In the example disclosed in Patent Document 1, the connection between the engagement sleeve and the housing via the engagement ring is performed together with the teeth of the engagement ring that are connected to the engagement sleeve at the same time as being directed toward the housing. Since it is designed, it is almost 100% rigid. A known solution for attenuating noise is to encapsulate the range gear box and / or place a sound shield outside the range gear box to attenuate the noise. The aim of the present invention is to reduce noise in an alternative way.

US Pat. No. 4,667,538

  The main object of the present invention is therefore to solve the above problems and to provide an improved device for noise reduction. This is achieved by the device discussed in the introduction, the characteristics of which are defined in claim 1. Claims 2 to 8 describe different embodiments and developments of the device according to the invention.

  The device according to the invention is based on an engagement ring for the engagement of gears in a planetary gear set via an engagement sleeve. The engagement ring is arranged to connect the engagement sleeve to the housing when the gear is engaged. The invention is characterized in that a torsion damper is incorporated in the engagement ring to damp the transmission of vibrations from the planetary gear set to the housing when the gear is engaged.

  According to one embodiment of the invention, the engagement ring is configured to connect the engagement sleeve to the engagement ring and a first connection device arranged to connect the engagement ring to the housing. Includes a second connected device. The first and second connection devices are separated from each other. In a further embodiment of the invention, the engagement ring distance in the radial and / or axial direction between the first and second connection devices is adapted to damp the vibration. And a predetermined twist of the engagement ring between the first and second connection devices with respect to the geometric center axis.

  Additional advantageous embodiments of the invention will become apparent from the dependent claims (claims 2 to 8) of the appended claims.

  The invention will now be further described, by way of example, with reference to additional preferred embodiments of the invention and the accompanying drawings showing the technical background.

FIG. 4 is a cross-sectional view disclosing only the upper part of the cross section of the engagement ring for each embodiment, in cross section through the geometric central axis of six different embodiments of the engagement ring according to the present invention. FIG. 4 is a cross-sectional view disclosing only the upper part of the cross section of the engagement ring for each embodiment, in cross section through the geometric central axis of six different embodiments of the engagement ring according to the present invention. FIG. 4 is a cross-sectional view disclosing only the upper part of the cross section of the engagement ring for each embodiment, in cross section through the geometric central axis of six different embodiments of the engagement ring according to the present invention. FIG. 4 is a cross-sectional view disclosing only the upper part of the cross section of the engagement ring for each embodiment, in cross section through the geometric central axis of six different embodiments of the engagement ring according to the present invention. FIG. 4 is a cross-sectional view disclosing only the upper part of the cross section of the engagement ring for each embodiment, in cross section through the geometric central axis of six different embodiments of the engagement ring according to the present invention. FIG. 4 is a cross-sectional view disclosing only the upper part of the cross section of the engagement ring for each embodiment, in cross section through the geometric central axis of six different embodiments of the engagement ring according to the present invention.

  FIG. 1 discloses an engagement ring 1 with a first connection device 2 arranged to connect the engagement ring to a housing (not disclosed). The housing may be a planetary gear set transmission housing such as a range gear box housing as disclosed in Patent Document 1 described above. A conical friction surface 4 is arranged to interact with a corresponding surface on a synchronization ring not disclosed. The second connection device 3 is arranged to connect an engagement sleeve (not disclosed) to the engagement ring 1 in a known manner (see for example patent document 1). Thus, according to the present invention, the first and second connecting devices are separated from each other to allow relative movement in the circumferential direction. The vibrations that occur in the planetary gear set and are transmitted to the second connection device via the engagement sleeve are on the way to the first connection device and the transmission housing, and the torsion Damped by the damper 5. The part 5 of the engagement ring acts as a torsion damper and can span the entire path from the first connection device 2 to the second connection device 3. Therefore, the distance of the torsion damper portion 5 extending radially and axially between the first and second connection devices with respect to the geometric center axis of the engagement ring is It is intended to allow a certain predetermined twist of the engagement ring between the first and the second connection device. Furthermore, the selected thickness of the material of the torsion damper part 5 will affect the damping characteristics. Of course, the material chosen will also affect the damping characteristics. In the embodiment of FIG. 1, the torsion damper portion 5 of the engagement ring is formed so that it essentially has a U-shape with a relatively wide cross section of the torsion damper.

  FIG. 2 is another example of the shape of the engagement ring 21 according to the present invention. The conical friction surface 4, the first connecting device 2 and the second connecting device 3 in the embodiment of FIG. 2 can be the same as in the embodiment of FIG. In this embodiment, the torsion damper portion 25 of the engagement ring has a minimal extent in the axial direction. Therefore, the torsion damper portion 25 basically has a narrow U-shape.

  The embodiments according to the invention of FIGS. 4, 5 and 6 show engagement rings 41, 51 and 61, respectively, which are different variants of the engagement ring disclosed in FIG. The conical shaped friction surface, first and second connecting devices in the embodiment of FIGS. 4, 5, and 6 can be the same as in the embodiment of FIG. The only important difference is that each of the engagement rings 41, 51, and 61 includes two rings, a first ring that includes the first connecting device 2 and a second ring that includes the second connecting device 3. It consists of a ring.

  In the embodiment of FIG. 4 an embodiment of an engagement ring 41 according to the invention is shown, in which the first ring 42 is the first connection device 2 and most of the torsion damper part 45. Includes part. The second ring 43 includes the second connecting device 3 and the conical friction surface 4. The first and second rings are secured together by a third connecting device 46 disposed on the first ring and a fourth connecting device 47 disposed on the second ring.

  In the embodiment of FIG. 5, an embodiment of an engagement ring 51 according to the invention is shown, in which the corresponding first ring 52 basically contains only the first connection device 2. . The corresponding second ring 53 in this case encompasses the second connection device 3, the conical friction surface 4 and the majority of the torsion damper part 55. In this case as well, the first and second rings are corresponding third connection devices 56 arranged on the first ring and corresponding fourth connection devices 57 arranged on the second ring. Fixed to each other.

  In the embodiment of FIGS. 4 and 5, the third and fourth connection devices are disclosed as meshing teeth (or splines). In these examples, the teeth extend generally axially with respect to the geometric center axis of the illustrated engagement ring.

  The embodiment of FIG. 6 also shows an embodiment of the engagement ring 61 according to the invention, in which the corresponding first ring 62 basically contains only the first connection device 2. To do. The corresponding second ring 63 again contains the second connection device 3, the conical friction surface 4 and the majority of the torsion damper part 65. Again, the first and second rings are corresponding third connection devices 66 disposed on the first ring and corresponding fourth connection devices 67 disposed on the second ring. Fixed to each other. In the embodiment of FIG. 6, the third and fourth connection devices are also disclosed as meshing teeth (or splines). In this example, these teeth extend substantially radially with respect to the geometric center axis of the illustrated engagement ring.

  The embodiment disclosed by FIG. 3 shows an engagement ring 31 according to the invention, which has some similarity to the split engagement ring embodiment described through FIGS. . The conical friction surface 4, the first connecting device 2, and the second connecting device 3 in the embodiment of FIG. 3 can be the same as in the embodiments of the other figures. The embodiment of FIG. 3 also shows an embodiment of the engagement ring 31 according to the invention, in which the corresponding first ring 32 basically contains only the first connection device 2. To do. The corresponding second ring 33 again comprises the second connection device 3, the conical friction surface 4 and the majority of the torsion damper part 35. In this case as well, the first and second rings are corresponding third connection devices 36 arranged on the first ring and corresponding fourth connection devices 37 arranged on the second ring. Fixed to each other. In the embodiment of FIG. 3 as well, the third and fourth connection devices are disclosed as meshing teeth. In this example, the teeth of the third connection device 36 extend substantially in the axial direction and the teeth of the fourth connection device 37 extend substantially in the radial direction. The torsion damper portion 35 basically has the shape of an S-shaped mirror image with a somewhat collapsed width.

  In an alternative embodiment to the embodiment of FIG. 3, the left and right sides of the torsion damper portion 35 can be reversed to form the first ring 32 portion. Thus, the second ring basically consists of only the second connecting device, the conical friction surface and the fourth connecting device in this embodiment.

  The design, dimensions and materials, in particular that of the torsion damper parts 5, 25, 35, 45, 55 and 65, are arranged between the first and second connecting devices to dampen the vibration. Selected to allow a predetermined twist of the ring. Practical experiments have shown that the rigidity of the torsion damper portion that allows a torsion of about 0.00018 radians / kNm gives adequate vibration damping results. The torsion damper portion according to the present invention can provide adequate vibration damping if designed to allow torsion in the range of 0.00015 radians / kNm to 0.00025 radians / kNm.

  The embodiment of FIGS. 3-6 contributes to simplifying the manufacture of the engagement ring by dividing the engagement ring into first and second rings that are secured together.

  In the embodiment shown here, the first and second connecting devices can be, for example, engaging teeth according to the prior art. Correspondingly, the third and fourth connecting devices can be teeth that mesh with each other or can be splined.

  An example of the material used for the damper part or a plurality of it can be carburized steel. Other hardened or tempered steels can be used as well. Different composite materials are possible.

  The invention is not limited to the embodiments described above, but rather many additional variations and modifications are considered to fall within the scope of the following claims.

DESCRIPTION OF SYMBOLS 1 Engagement ring 2 1st connection device 3 2nd connection device 4 Conical-shaped friction surface 5 Torsion damper part 21 Engagement ring 25 Torsion damper part 31 Engagement ring 32 1st ring 33 2nd ring 35 Torsion damper portion 36 Third connection device 37 Fourth connection device 41 Engagement ring 42 First ring 43 Second ring 45 Torsion damper portion 46 Third connection device 47 Fourth connection device 51 Joint ring 52 First ring 53 Second ring 55 Torsion damper part 56 Third connection device 57 Fourth connection device 61 Engagement ring 62 First ring 63 Second ring 65 Torsion damper part 66 Second 3 connection devices 67 4th connection device

Claims (6)

An engagement ring (1, 21, 31, 41, 51, 61) for engagement of a gear in a planetary gear set via an engagement sleeve, wherein the engagement ring engages the gear A first connecting device (2) and the engagement sleeve arranged to connect the engagement sleeve to the housing when the engagement ring is arranged to connect the engagement ring to the housing Including a second connecting device (3) arranged to connect to the engagement ring;
The first and second connecting devices are separated from each other so as to be relatively movable in the circumferential direction, and are integrated into the engagement ring as a torsion damper (5, 25, 35, 45, 55, 65). ) is incorporated, and when said gear is engaged, in order to attenuate the transmission of vibrations from the planetary gear set to the housing, radially between said first and said second connection devices and The distance in the axial direction is such that the torsion damper allows a predetermined twist between the first and second connection devices with respect to the geometric center axis of the engagement ring. An engagement ring characterized by that. The predetermined twist is in the range of 0.00015 radians / kNm to 0.00025 radians / kNm,
The engagement ring according to claim 1. The engagement ring includes a first ring (32, 42, 52, 62) and a second ring (33, 43, 53, 63) , the rings are fixed to each other , and the first ring is Including a first connection device, wherein the second ring includes the second connection device;
The engagement ring according to claim 1 or 2. Said first ring is the third connection devices (36,46,56,66) and said second ring includes a fourth connecting device (37,47,57,67), said third and 4 connecting devices are arranged to secure the first ring with the second ring,
The engagement ring according to claim 3 . The first and second connection devices are teeth arranged to mate with corresponding teeth on the engagement sleeve and the housing,
The engagement ring according to any one of claims 1 to 4.   A range gear for a vehicle including a planetary gear set, the range gear including the engagement ring according to any one of claims 1-5.

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