JP2018194110A - Lubricating device of transmission - Google Patents

Abstract

To provide a lubricating device of a transmission that can supply sufficient lubricating oil to a machine element provided on a rotating shaft.SOLUTION: A lubricating device of a transmission supplies lubricating oil to a machine element provided on a rotating shaft, via an axial oil passage and a radial oil passage formed inside the rotating shaft incorporated in the transmission, and comprises a nozzle inserted into the axial oil passage from an opening part at a side of one end in an axial direction of the rotating shaft to supply the lubricating oil to the axial oil passage, and a seal member provided on an outer peripheral surface of one end part in the axial direction of the rotating shaft.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a transmission lubrication device.

  Patent Document 1 discloses lubrication that lubricates mechanical elements (for example, bearings, gears, and the like) provided on a rotating shaft by supplying lubricating oil to a lubricating oil passage formed inside the rotating shaft incorporated in the transmission. An apparatus is disclosed. In the case of such a lubricating device, a nozzle for injecting lubricating oil into the axial oil passage of the rotating shaft is inserted into the axial oil passage from the opening on one end side. Lubricating oil injected into the axial oil passage is supplied to each machine element through the axial oil passage and the radial oil passage of the rotating shaft.

JP2013-113305A

  By the way, in the case of the lubricating device as described above, the lubricating oil in the axial oil passage passes through the clearance between the inner peripheral surface of the rotating shaft and the outer peripheral surface of the nozzle that defines the axial oil passage. There is a possibility that a sufficient amount of lubricating oil will not be supplied to the machine element from the one end in the axial direction.

  An object of the present invention is to provide a lubricating device for a transmission capable of supplying sufficient lubricating oil to a machine element provided on a rotating shaft.

  One aspect of the lubrication device for a transmission according to the present invention lubricates a mechanical element provided on the rotary shaft through an axial oil passage and a radial oil passage formed in a rotary shaft incorporated in the transmission. A lubricating device for a transmission for supplying oil, the nozzle being inserted into the axial oil passage from an opening on one end side in the axial direction of the rotating shaft, and supplying the lubricating oil to the axial oil passage; And a seal member provided on the outer peripheral surface of one end portion in the axial direction of the rotation shaft.

  According to the lubricating device for a transmission of the present invention, sufficient lubricating oil can be supplied to the machine element provided on the rotating shaft.

It is sectional drawing which shows the lubricating device of the transmission which concerns on embodiment of this invention. It is the A section enlarged view of FIG. It is a perspective view of a sealing member. It is sectional drawing of a sealing member. It is an end view of a sealing member. It is sectional drawing which shows an example of the modification of a sealing member.

  Hereinafter, a transmission lubrication device according to an embodiment of the present invention will be described with reference to the drawings. The embodiment described below is an example of a transmission lubrication device according to the present invention, and the present invention is not limited to the embodiment.

[1. About Embodiment]
With reference to FIGS. 1-5, the structure of the lubricating device 1 of the transmission which concerns on this embodiment is demonstrated. FIG. 1 is a cross-sectional view showing a transmission lubricating device 1 according to the present embodiment. FIG. 2 is an enlarged view of part A in FIG. FIG. 3 is a perspective view of the seal member 11. FIG. 4 is a cross-sectional view of the seal member 11. FIG. 5 is an end view of the seal member 11.

[1.1 Outline of transmission lubrication system]
First, with reference to FIG. 1, the outline | summary of the lubrication apparatus 1 of the transmission which concerns on this embodiment is demonstrated. The transmission lubrication device 1 according to this embodiment includes an axial oil passage 201 and a radial oil passage 202 formed inside a counter shaft 20 (also simply referred to as a rotating shaft) incorporated in the transmission 2. Thus, lubricating oil is supplied to machine elements (for example, bearings, gears, etc.) provided on the countershaft 20. Such a transmission lubrication device 1 includes a nozzle 10 that is inserted into an axial oil passage 201 through an opening on one end side in the axial direction of a countershaft 20 and supplies lubricating oil to the axial oil passage 201, and a countershaft. 20 and a seal member 11 provided on the outer peripheral surface of one end portion in the axial direction.

  In the following description, “axial direction”, “radial direction”, and “circumferential direction” refer to the respective directions of the counter shaft 20 in the assembled state. Hereinafter, the members constituting the lubricating device 1 and the transmission 2 of the transmission will be described based on the state in which these members are incorporated in the lubricating device 1 and the transmission 2 of the transmission.

[1.2 Outline of transmission]
As described above, the transmission lubrication device 1 according to the present embodiment is incorporated into a transmission 2 as shown in FIG. 1, for example. Examples of the transmission in which the transmission lubrication device 1 according to the present embodiment is incorporated include a transmission such as an AMT (Automated Manual Transmission) or a manual transmission. Such a transmission performs gear stage switching processing based on the control of a control device (not shown) or the operation of a shift lever (not shown) by the driver. Hereinafter, as for the structure of the transmission 2, only the structure of the part necessary for the description of the lubricating device 1 of the transmission according to the present embodiment will be described. About another structure, it is the same as that of the structure of the various transmissions known conventionally.

  The counter shaft 20 is provided in parallel with the input shaft (not shown) of the transmission 2. Such a countershaft 20 has an axial oil passage 201 that opens to one end surface (left end surface in FIGS. 1 and 2) in the axial direction (left and right direction in FIGS. 1 and 2) and extends in the axial direction. doing. That is, such an axial oil passage 201 is defined by the inner peripheral surface of the hollow portion of the countershaft 20.

  In the case of this embodiment, the other end (not shown) in the axial direction of the axial oil passage 201 is not opened. That is, the other end in the axial direction of the axial oil passage 201 is located at an intermediate portion in the axial direction of the countershaft 20.

  The countershaft 20 has a plurality of radial oil passages 202. Note that any number of radial oil passages 202 can be formed in the portion of the countershaft 20 that is omitted in FIG.

  The radial oil passages 202 as described above open to the axial oil passage 201 (that is, the inner peripheral surface of the countershaft 20) and the outer peripheral surface of the countershaft 20, respectively. By the axial oil passage 201 and the radial oil passage 202 as described above, the lubricating oil supplied to the axial oil passage 201 from the opening on one end side in the axial direction becomes the axial oil passage 201 and the radial oil passage 202. And is supplied to the outer peripheral surface of the counter shaft 20.

  In the case of this embodiment, a counter gear 22 (for example, a reverse gear) is provided via a needle bearing 21 at a portion where the radial oil passage 202 is opened on the outer peripheral surface of the counter shaft 20.

  In addition, the mechanical element provided in the counter shaft 20 may be a mechanical element constituting a synchromesh mechanism, for example, as well as the counter gear 22 and the needle bearing 21 shown in FIG.

  The countershaft 20 has a small diameter portion 203 on the outer peripheral surface of one end portion in the axial direction. A locking groove 204 is formed on the entire outer peripheral surface of the small diameter portion 203.

  The counter shaft 20 as described above is supported by the case 23 of the transmission 2 via a rolling bearing 24 (in the illustrated case, a tapered roller bearing) fitted on the small diameter portion 203. In this state, the counter shaft 20 can rotate with respect to the case 23.

  The case 23 described above has a recess 230 into which one end portion in the axial direction of the countershaft 20 can be inserted. Specifically, the concave portion 230 includes a small-diameter concave portion 230a, a medium-diameter concave portion 230c, and a large-diameter concave portion 230e in order from one side (left side in FIGS. 1 and 2) in the axial direction.

  The outer ring 241 of the rolling bearing 24 described above is fitted in the large-diameter recess 230e. One end surface of the outer ring 241 in the axial direction is in contact with a step portion between the medium diameter recess 230c and the large diameter recess 230e.

  On the other hand, the inner ring 242 of the rolling bearing 24 is fixed to the small diameter portion 203 of the counter shaft 20 by press fitting. The other end surface of the inner ring 242 in the axial direction is in contact with a part of the clutch hub 25 provided on the other side in the axial direction.

  One end surface of the inner ring 242 in the axial direction is in contact with a retaining ring 26 (C ring in the case of the present embodiment) that is latched in the retaining groove 204 of the small diameter portion 203. In this way, the inner ring 242 is positioned on both sides in the axial direction.

  In the case of the present embodiment, in the rolling bearing 24, the smaller diameter side of the inner ring raceway of the inner ring 242 and the outer ring raceway of the outer ring 241 is disposed on one side in the axial direction. The rolling bearing 24 may be a ball bearing, for example.

[1.3 Specific configuration of transmission lubrication system]
Next, a specific configuration of the transmission lubrication device 1 according to the present embodiment will be described. The transmission lubricating device 1 includes a lubricating oil supply unit (not shown) including a pump and an oil passage (for example, a hose), a nozzle 10, and a seal member 11.

[1.3.1 Lubricating oil supply section]
The lubricating oil supply unit includes, for example, a pump that pumps up the lubricating oil accumulated in the lower part of the case 23 of the transmission 2, an oil whose one end is connected to the discharge port of the pump and the other end is connected to the recess 230 of the case 23. And a road (not shown). For example, the other end of the oil passage opens into a small-diameter recess 230a (portion indicated by a broken line X in FIGS. 1 and 2) of the recess 230. About such a lubricating oil supply part, since the structure known conventionally can be employ | adopted, detailed description is abbreviate | omitted.

[1.3.2 Nozzles]
The nozzle 10 is made of, for example, metal or synthetic resin, and injects the lubricating oil supplied from the lubricating oil supply unit into the axial oil passage 201 of the countershaft 20. Hereinafter, a specific structure of the nozzle 10 will be described.

  The nozzle 10 includes a nozzle body 100, a nozzle side annular part 101, and a nozzle side fitting cylinder part 102. The nozzle body 100 is cylindrical and has an outer diameter smaller than the diameter of the axial oil passage 201 of the countershaft 20 (that is, the inner diameter of the countershaft 20).

  Such a nozzle body 100 is inserted into the axial oil passage 201 from an opening on one end side in the axial direction. In this state, a predetermined radial gap 12 exists between the outer peripheral surface of the nozzle body 100 and the inner peripheral surface of the axial oil passage 201.

  The nozzle-side annular portion 101 extends outward from the nozzle body 100 in the radial direction. Specifically, the nozzle-side annular portion 101 has an annular shape, and an inner edge in the radial direction is continuous with one end portion in the axial direction of the nozzle body 100. The outer diameter of the nozzle-side annular ring portion 101 is larger than the outer diameter of the small-diameter portion 203 of the counter shaft 20 and smaller than the inner diameter of the medium-diameter concave portion 230 c of the concave portion 230.

  Such a nozzle-side annular portion 101 is disposed on one side in the axial direction with respect to the counter shaft 20. Between the other side surface in the axial direction of the nozzle-side annular portion 101 and one end surface in the axial direction of the countershaft 20, there is an axial gap 13 having a predetermined size.

  Further, the outer end portion in the radial direction of the nozzle-side circular ring portion 101 is disposed on the other side in the axial direction with respect to the first step portion 230f between the small-diameter concave portion 230a and the medium-diameter concave portion 230c. One side surface in the axial direction of the nozzle-side annular portion 101 and the first step portion 230f are opposed to each other with a slight gap in the axial direction.

  In this state, an oil space 14 in which the lubricating oil supplied from the lubricating oil supply unit described above can exist is formed between the small-diameter concave portion 230a of the concave portion 230 and the nozzle-side annular ring portion 101.

  The nozzle side fitting cylinder part 102 extends from the nozzle side annular part 101 to the other side in the axial direction. Specifically, the nozzle-side fitting cylinder portion 102 has a cylindrical shape, and one end portion in the axial direction is continuous with the outer end portion in the radial direction of the nozzle-side annular portion 101. The outer diameter of the nozzle-side fitting cylinder portion 102 is slightly smaller than the inner diameter of the medium-diameter concave portion 230c.

  Such a nozzle side fitting cylinder part 102 is arrange | positioned inside the radial direction of the medium diameter recessed part 230c. In this state, the outer peripheral surface of the nozzle-side fitting cylinder portion 102 is opposed to the inner peripheral surface of the medium-diameter concave portion 230c with a slight gap in the radial direction. In addition, the outer peripheral surface of the nozzle side fitting cylinder part 102 may be press-fitted in the inner peripheral surface of the medium diameter recessed part 230c.

  The other end surface in the axial direction of the nozzle-side fitting cylinder portion 102 is opposed to one end surface in the axial direction of the outer ring 241 of the rolling bearing 24 with a slight gap in the axial direction.

[1.3.3 Seal member]
The seal member 11 is made of, for example, metal or synthetic resin, and is provided on the outer peripheral surface of one end portion in the axial direction of the counter shaft 20. Specifically, the seal member 11 is provided between one end surface of the counter shaft 20 in the axial direction and the rolling bearing 24.

  The seal member 11 prevents the lubricating oil in the axial oil passage 201 of the countershaft 20 from flowing out to the other axial side of the seal member 11 (that is, the rolling bearing 24 side), or from the seal member 11. Is also provided for the purpose of adjusting the amount of the lubricating oil flowing out to the other side in the axial direction. Therefore, the seal member 11 does not have to have a structure capable of zeroing out the lubricating oil.

  Hereinafter, a specific structure of the seal member 11 will be described. The seal member 11 includes a fitting part 110, a seal plate part 111, a protruding piece 112, and a claw part 113.

  The fitting part 110 is cylindrical and is fixed to the countershaft 20 by press fitting. Specifically, the fitting portion 110 is press-fitted into one side portion in the axial direction from the locking groove 204 in the small diameter portion 203 of the countershaft 20.

  The seal plate portion 111 extends outward from the fitting portion 110 in the radial direction. Specifically, the seal plate portion 111 has an annular shape, and an end portion on the inner side in the radial direction is continuous with one end portion in the axial direction of the fitting portion 110. The outer diameter of the seal plate portion 111 is smaller than the inner diameter of the nozzle-side fitting cylinder portion 102 described above. The outer peripheral surface of such a seal plate portion 111 is opposed to the inner peripheral surface of the nozzle-side fitting tube portion 102 with a radial gap S therebetween.

  It should be noted that by adjusting the gap S, the amount of lubricating oil flowing out to the other side in the axial direction from the seal plate portion 111 can be adjusted. That is, when it is desired to reduce the amount of lubricating oil flowing out, the gap S is reduced.

  The protruding piece 112 has a partial cylindrical shape and protrudes from a part of the other end surface in the axial direction of the fitting portion 110 to the other side in the axial direction. The protruding piece 112 is disposed at a discontinuous portion of the retaining ring 26 (that is, the C ring).

  The claw portion 113 is formed on the inner side surface of the protruding piece 112 in the radial direction. Such a claw 113 regulates the displacement of the seal member 11 toward one side (left side in FIGS. 1 and 2) in the axial direction by engaging with the counter shaft 20. In the present embodiment, the claw portion 113 is engaged with one side surface in the axial direction of the locking groove 204 of the countershaft 20.

[1.4 Actions and effects of this embodiment]
According to the transmission lubricating apparatus 1 of the present embodiment having the above-described configuration, sufficient lubricating oil can be supplied to machine elements such as the counter gear 22 and the needle bearing 21 provided on the counter shaft 20. Hereinafter, this reason will be described.

  The lubricating oil supplied from the lubricating oil supply unit to the oil space 14 is injected by the nozzle 10 into the axial oil passage 201 of the countershaft 20 (see arrow α1 in FIG. 1). A part of the lubricating oil injected into the axial oil passage 201 passes through the radial gap 12 and the axial gap 13 as shown by broken arrows β1 and β2 in FIGS. Try to spill from. On the other hand, in the case of this embodiment, the seal member 11 is provided in the small diameter portion 203 of the counter shaft 20. In such a seal plate portion 111 of the seal member 11, the gap between the small diameter portion 203 of the counter shaft 20 and the inner peripheral surface of the nozzle side fitting cylinder portion 102 is adjusted to an appropriate size. For this reason, it is possible to adjust the amount of the lubricating oil flowing out from the seal plate portion 111 to the other side in the axial direction (that is, the rolling bearing 24 side). As a result, since the lubricating oil in the axial oil passage 201 can be maintained at an appropriate amount, a sufficient amount of lubricating oil is supplied to the counter gear 22 and the needle bearing 21 described above.

  In the case of the present embodiment, the rolling bearing 24 is a tapered roller bearing. Such a tapered roller bearing has a pumping action in which lubricating oil flows between the outer ring 241 and the inner ring 242 from left to right in FIGS. The pumping action acts to promote the outflow of lubricating oil from the axial oil passage 201. Even when such a pump action occurs, in the present embodiment, the amount of lubricating oil flowing out from the axial oil passage 201 can be adjusted to an appropriate amount by the seal member 11.

[1.5 Addendum]
As a modification of the above-described embodiment, a flow rate adjusting hole 114 may be formed in the seal plate portion 111a as in the seal member 11a shown in FIG. By forming such a flow rate adjusting hole 114, the amount of lubricating oil flowing out to the other side in the axial direction can be adjusted more finely than the seal plate portion 111a. When implementing such a modification, the outer peripheral surface of the seal plate portion 111a may be close to and opposed to the inner peripheral surface of the nozzle-side fitting tube portion 102 (see FIGS. 1 and 2).

  The present invention can be applied to a transmission such as an AMT or a manual transmission.

DESCRIPTION OF SYMBOLS 1 Lubricator of transmission 10 Nozzle 100 Nozzle main body 101 Nozzle side annular part 102 Nozzle side fitting cylinder part 11 Seal member 110 Fitting part 111 Seal plate part 112 Projection piece 113 Claw part 114 Flow rate adjustment hole 12 Radial direction gap 13 Axial clearance 14 Oil space 2 Transmission 20 Countershaft 201 Axial oilway 202 Radial oilway 203 Small diameter portion 204 Locking groove 21 Needle bearing 22 Counter gear 23 Case 230 Concave 24 Rolling bearing 26 Retaining ring

Claims (6)

A lubricating device for a transmission for supplying lubricating oil to a mechanical element provided on the rotary shaft through an axial oil passage and a radial oil passage formed inside a rotary shaft incorporated in the transmission,
A nozzle that is inserted into the axial oil passage from an opening on one end side in the axial direction of the rotating shaft, and supplies lubricating oil to the axial oil passage;
And a seal member provided on an outer peripheral surface of one end portion in the axial direction of the rotating shaft. The rotating shaft is supported by a case of the transmission via a bearing;
The seal member is provided on one end side in the axial direction of the rotary shaft from the bearing.
The transmission lubrication device according to claim 1.   The case has a recess into which one end in the axial direction of the rotating shaft can be inserted, and the outer peripheral surface of the seal member faces the inner peripheral surface of the concave portion in the radial direction of the rotating shaft. The transmission lubrication device according to claim 2.   The said seal member has a fitting part fitted by the said rotating shaft, and the sealing board part extended to the outer side in the radial direction of the said rotating shaft from the said fitting part. A transmission lubrication device according to claim 1.   The transmission lubrication device according to claim 4, wherein a flow rate adjusting hole is formed in the seal plate portion.   The transmission lubrication device according to any one of claims 1 to 5, wherein the seal member has a claw portion engageable with the rotation shaft.

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