JP2015064058A - Multi-disc transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To supply oil to a contact part of a disc even under a constitution that plural discs are mounted to one shaft and a collar is mounted between the discs.SOLUTION: Plural discs 11a are mounted to an input shaft 10. A collar 22 is interposed between the plural discs 11a. An inner oil path 10i extending in an axial direction, and an oil supply port 10p connected to the inner oil path 10i and opened between the plural discs 11a is formed on the input shaft 10. The collar 22 is constituted by plural pieces. The plural pieces are spaced from each other in a circumferential direction, so that a gap 22g connected to the oil supply port 10p is formed between the adjacent pieces.

Description

  The present invention relates to a multi-disc transmission.

  The present applicant forms a disk overlap area by partially overlapping the primary disk mounted on the input shaft and the secondary disk mounted on the output shaft, and presses a part of the same area from both sides. The primary disk and the secondary disk are brought into contact to realize power transmission between the input and output shafts, and the contact portion between the primary disk and the secondary disk is moved between the input shaft and the output shaft to move the input and output shafts. A multi-disc transmission that realizes a shift between the two has been proposed (Patent Document 1).

JP 2010-53995 A

  At the contact portion between the primary disk and the secondary disk, slippage occurs due to a peripheral speed difference or the like, and the contact portion generates heat. For this reason, it is necessary to supply oil to a contact part and to cool a contact part.

  As a cooling structure of the contact portion, an internal oil passage is formed on the input shaft and the output shaft, and an oil supply port that is connected to the internal oil passage and opens toward the contact portion is formed. The structure which supplies oil to a contact part by moving outside by centrifugal force can be considered.

  However, in a configuration in which there are a plurality of disks mounted on one shaft and a collar (spacer) for adjusting the distance between the disks to a specified value is interposed between the disks, the oil supply port is formed. However, the collar is in the way and cannot be supplied to the contact part.

  If the collar is thick enough, a passage for oil to flow from the inner periphery to the outer periphery of the collar can be formed on one side of the collar or inside the collar, but the distance between the disks is short. If the thickness is thin, such a configuration cannot be adopted.

  The present invention has been made in view of such a technical problem, and even if there is a plurality of disks mounted on one shaft and a collar is mounted between them, an oil is applied to the contact portion of the disk. Is intended to be supplied.

  According to an aspect of the present invention, there is provided a multi-disc transmission, which is an input shaft and an output shaft that are arranged in parallel, a primary disc that is attached to the input shaft, and a primary disc that is attached to the output shaft. A secondary disk that partially overlaps with each other to form a superposition region; and a part of the superposition region is pressed from both sides to bring the primary disc and the secondary disc into contact with each other, and the input shaft and the output shaft And a variable pressing mechanism that realizes a shift between the input shaft and the output shaft by moving the pressing portion between the input shaft and the output shaft. A plurality of disks are mounted on at least one of the input shaft and the output shaft, and a collar is interposed between the plurality of disks. An oil supply port that is opened between the plurality of disks is formed, the collar is composed of a plurality of pieces, and the plurality of pieces have gaps that connect to the oil supply port between adjacent pieces. There is provided a multi-disc transmission characterized in that it is circumferentially spaced as formed.

  According to the above aspect, the collar can supply oil to the contact portion without interfering with the oil supplied between the disks from the oil supply port.

1 is an overall schematic view of a vehicle including a multi-disc transmission. It is sectional drawing of an input shaft and an output shaft. FIG. 3 is a sectional view taken along line III-III in FIG. 2. It is a perspective view of a color. It is a top view of a color assembly shim. It is the figure which showed the use condition of the shim for color assembly.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 shows an overall configuration of a vehicle 1 including a multi-disc transmission according to an embodiment of the present invention.

  The vehicle 1 includes an engine 2 as a power source, a multi-disc transmission (hereinafter referred to as “transmission”) 3, left and right drive shafts 4 and 5, and left and right drive wheels 6 and 7. The transmission 3 includes a transmission case 9, an input shaft 10, a primary disk 11, a secondary disk 12, a pressing roller 13, an output shaft 14, a dry start clutch 15, a reverse gear 16, and a reverse gear. An idler gear 17, an output gear 18, a sleeve 19, a final gear 20, and a differential gear unit 21 are provided.

  The configuration of the transmission 3 will be described. The input shaft 10 and the output shaft 14 are arranged in parallel and are supported by the transmission case 9 via bearings 24.

  The primary disk 11 is composed of two circular disks 11a. As shown in FIG. 2, the two disks 11a are mounted on the input shaft 10 in the axial direction and fixed to the input shaft 10 with nuts 11c. A collar 22 (spacer) is interposed between the two disks 11a, and the interval between the two disks 11a is adjusted to a specified value.

  The secondary disk 12 includes a center disk 12a and two side disks 12b disposed on both sides of the center disk 12a. As shown in FIG. 2, the center disk 12a and the two side disks 12b are mounted on the output shaft 14 side by side in the axial direction, and are fixed to the output shaft 14 with nuts 12c. A collar 23 (spacer) is interposed between the center disk 12a and the side disk 12b, and the distance between the center disk 12a and the side disk 12b is adjusted to a specified value.

  The disk 11a of the primary disk 11 and the center disk 12a and side disk 12b of the secondary disk 12 are alternately arranged so as to partially overlap when viewed from the direction orthogonal to the disk surface. A disk overlap region is formed.

  The pressing roller 13 is configured to be movable between the input shaft 10 and the output shaft 14 by an actuator (not shown) and movable in a direction perpendicular to the disk surfaces of the primary disk 11 and the secondary disk 12.

  When the pressing roller 13 is displaced and a part of the disk overlap region is pressed from both sides by the pressing roller 13, the primary disk 11 and the secondary disk 12 are elastically deformed and contacted to form a contact portion. By forming the contact portion, power transmission between the input shaft 10 and the output shaft 14 is realized, and the position of the contact portion is moved between the input shaft 10 and the output shaft 14 so that the input is performed. A shift between the shaft 10 and the output shaft 14 is realized.

  By the way, in a contact part, slip generate | occur | produces by the circumferential speed difference etc. of the primary disk 11 and the secondary disk 12, and a contact part generate | occur | produces heat. For this reason, it is necessary to supply and cool oil to a contact part.

  Therefore, in the present embodiment, an oil supply structure described below is adopted.

  As shown in FIG. 2, the input shaft 10 and the output shaft 14 are respectively formed with internal oil passages 10i and 14i extending in the axial direction. Oil is supplied to the internal oil passages 10i and 14i from a hydraulic circuit (not shown).

  The input shaft 10 and the output shaft 14 are further formed with oil supply ports 10p and 14p that are connected to the internal oil passages 10i and 14i and open on the side surfaces of the shaft. The oil supply ports 10p and 14p are located between the disks mounted on the shaft on which they are formed (between two disks 11a if the oil supply port 10p, and the center disk 12a and the side disk if the oil supply port 14p. 12b). In the present embodiment, the oil supply ports 10p and 14p are configured by three holes extending radially from the internal oil passages 10i and 14i, respectively (see FIG. 3).

  Further, as shown in FIG. 4, the collars 22 and 23 are constituted by three fan-shaped pieces 22p and 23p arranged at intervals in the circumferential direction. The pieces 22p and 23p are positioned in the circumferential direction so that gaps 22g and 23g formed between pieces adjacent in the circumferential direction are connected to the oil supply ports 10p and 14p (see FIG. 3).

  When attaching the collars 22 and 23 to the input shafts 10 and 14, first, the gaps 22g and 23g between the curved surface 31 and the pieces shown in FIG. 5 which are thinner than the pieces 22p and 23p and contact the outer periphery of the pieces 22p and 23p. A plurality of collar assembling shims 30 having protrusions 32 to be inserted into are provided, and these surround the pieces 22p and 23p as shown in FIG.

  And in this state, it mounts | wears with the input shaft 10 and the output shaft 14, respectively, and fastens the primary disk 11 and the secondary disk 12 with the pieces 22p and 23p with the nuts 11c and 12c, respectively. By using such a color assembling shim 30, the pieces 22p and 23p can be efficiently and correctly arranged.

  After tightening the nuts 11c and 12c, the collar assembly shim 30 is removed from the pieces 22p and 23p. The collar assembling shim 30 is thinner than the pieces 22p and 23p, and no force acts on the pieces 22p and 23p from the nuts 11c and 12c. Can be pulled out.

  Then, the effect of this embodiment is demonstrated.

  In the present embodiment employing the oil supply structure, the oil in the internal oil passages 10i and 14i is supplied between the disks from the oil supply ports 10p and 14p through the gaps 22g and 23g (see arrows in FIG. 3). The oil supplied between the disks from the oil supply ports 10p and 14p moves in the radial direction of the disk by centrifugal force, and when the oil reaches the contact part, the contact part is lubricated and cooled.

  Therefore, in this embodiment, the collars 22 and 23 do not interfere with the oil supplied between the disks from the oil supply ports 10p and 14p, and can supply oil to the contact portion.

  The embodiment of the present invention has been described above, but the above embodiment is merely one example of application of the present invention, and the technical scope of the present invention is limited to the specific configuration of the above embodiment. is not.

  For example, the number and shape of the pieces 22p and 23p constituting the collars 22 and 23 are not limited to those of this embodiment, and the number of pieces 22p and 23p constituting the collars 22 and 23 may be increased or decreased. It may be rectangular, trapezoidal or the like.

DESCRIPTION OF SYMBOLS 10 Input shaft 10i Internal oil path 10p Oil supply port 11 Input disk 12 Secondary disk 13 Pressing roller (variable pressing mechanism)
14 Output shaft 14i Internal oil passage 14p Oil supply port 22 Color 22p piece 23 Color 23p piece

Claims (1)

A multi-disc transmission,
An input shaft and an output shaft arranged in parallel;
A primary disk mounted on the input shaft;
A secondary disk mounted on the output shaft and partially overlapping with the primary disk to form a superposition region;
A part of the overlapping region is pressed from both sides to bring the primary disk and the secondary disk into contact with each other to realize power transmission between the input shaft and the output shaft, and a pressing portion is connected to the input shaft and the input shaft. A variable pressing mechanism that realizes a shift between the input shaft and the output shaft by moving between the output shaft and the output shaft;
With
A plurality of disks are mounted on at least one of the input shaft and the output shaft,
A collar is interposed between the plurality of disks,
The at least one shaft is formed with an oil supply port that opens between the plurality of disks,
The collar is composed of a plurality of pieces, and the plurality of pieces are arranged at intervals in the circumferential direction so that a gap connecting to the oil supply port is formed between adjacent pieces.
A multi-disc transmission characterized by that.

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