JP2015102234A - Lubrication structure and lubrication method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lubrication structure which can efficiently supply a lubricant into an inner hole of a rotating body, and a lubrication method.SOLUTION: A lubrication structure supplies a lubricant which is scooped up and scattered by a reduction driven gear RG' into an inner hole 2b of an input shaft 2 via a penetration hole 2c formed at the input shaft 2. The penetration hole 2c has a center line CL which is offset to a rear side of the input shaft 2 in a rotating direction with respect to a virtual diameter direction line RL of the input shaft 2 so as to progress along a relative trace of the scattered lubricant. By this constitution, the scattered lubricant can be efficiently taken into the inner hole 2b of the input shaft 2 via the penetration hole 2c. Furthermore, the number of part items can be reduced compared with a conventional structure which needs an exclusive component for only supplying the lubricant into the inner hole 2b, thus providing the rationalized lubrication structure.

Description

  The present invention relates to a lubricating structure for supplying lubricating oil to an inner hole of a rotating body having an inner hole.

  Conventionally, this type of lubricating structure includes a main drive shaft that is rotatably supported by a casing, and a main shaft that is rotatably supported by a shaft inner hole of the main drive shaft via a needle bearing. In the machine, a structure for supplying lubricating oil to the needle bearing has been proposed (see, for example, Patent Document 1).

  In this lubrication structure, a radial hole penetrating the shaft inner hole is formed in the main drive shaft, and an oil plate is provided at a position corresponding to the radial hole of the main drive shaft, so that the lubrication existing around the main drive shaft is present. Oil is supplied to the shaft inner hole, that is, the needle bearing through the radial hole by the oil plate.

Japanese Utility Model Publication No. 61-85767

  However, the above-described lubrication structure is a configuration in which an oil plate is provided only for the purpose of feeding lubricant oil to the needle bearing, and cannot be said to be a rational component configuration. Even if the oil plate is provided, the lubricating oil cannot be efficiently supplied to the needle bearing due to the centrifugal force generated with the rotation of the main drive shaft.

  The present invention has been made in view of the above, and an object of the present invention is to provide a rational lubricating structure capable of efficiently supplying lubricating oil to the inner hole of a rotating body.

  The lubrication structure and lubrication method of the present invention employ the following means in order to achieve the above-described object.

  According to a preferred embodiment of the lubricating structure according to the present invention, the first rotating body having the inner hole and the second rotating body that performs rotation corresponding to the rotation of the first rotating body are provided. A lubrication structure is configured to supply the scraped lubricating oil to the inner hole. A through hole that penetrates from the outer peripheral surface of the first rotating body to the inner hole is formed in the first rotating body. And the through-hole is comprised along the relative locus | trajectory which is a locus | trajectory of the lubricating oil at the time of seeing the lubricating oil which is scraped up and scattered by the 2nd rotary body from the rotating 1st rotary body. In the present invention, “perform the rotation corresponding to the rotation of the first rotating body” typically corresponds to an aspect in which the second rotating body is rotated based on the rotation of the first rotating body. A mode in which the first rotating body is rotated based on the rotation of the second rotating body is suitably included. In addition, as an aspect in which the second rotating body or the first rotating body is rotated based on the rotation of the first rotating body or the second rotating body, the second rotating body or the first rotating body is the first rotating body or In addition to a mode in which the second rotating body is directly rotated, a mode in which the second rotating body or the first rotating body is indirectly rotated by the first rotating body or the second rotating body is included.

  The lubricating oil that is scraped and scattered by the second rotating body has a locus along the tangential direction of the outer peripheral surface of the second rotating body when viewed from a stationary reference point. When viewed from the first rotating body, it has a locus along a predetermined curve. According to the present invention, the through hole is a relative locus that is a locus of the lubricating oil when the lubricating oil that is scraped up and scattered by the second rotating body is viewed from the rotating first rotating body, that is, the predetermined Since it is comprised along the locus | trajectory along a curve, the lubricating oil which is scraped up and scattered by the 2nd rotary body can be efficiently supplied to the inner hole of a 1st rotary body via a through-hole. In addition, since a dedicated part for supplying lubricating oil to the inner hole of the first rotating body is unnecessary, the number of parts can be reduced, which is reasonable.

  According to the further form of the lubrication structure according to the present invention, the through hole has a center line that is offset from the radial direction line of the first rotating body to the rear in the rotational direction of the first rotating body. Have

  According to this embodiment, since the configuration is only to form a through hole having a center line that is offset rearward in the rotational direction of the rotating body with respect to the radial line of the rotating body, it is scraped up by the second rotating body. Therefore, it is possible to easily realize a configuration that follows the relative trajectory of the lubricating oil scattered.

  According to the further form of the lubricating structure which concerns on this invention, the 1st rotary body has a 1st rotating shaft and the 1st gearwheel provided in the said 1st rotating shaft. The second rotating body includes a second rotating shaft that is arranged in parallel to the first rotating shaft, and a second gear that is provided on the second rotating shaft and meshes with the first gear. And the through-hole is formed in the 1st rotating shaft.

  According to this embodiment, when the first rotating body or the second rotating body has the first rotating shaft, the second rotating shaft, the first gear, or the second gear, the through hole is formed in the first rotating shaft. Therefore, it is easier to configure the through hole so as to follow the locus of the lubricating oil that scatters as compared to the configuration in which the first gear is formed with the through hole. Further, the spattered lubricating oil is not inhibited from entering the through hole by the tooth surface of the first gear. Accordingly, even when the first rotating body or the second rotating body has the first rotating shaft, the second rotating shaft, the first gear, or the second gear, the lubricating oil can be rationally and efficiently provided. Can be supplied to the inner hole.

  According to the further form of the lubrication structure according to the present invention, the through hole is formed adjacent to the first gear. The second gear is configured to overlap the through hole in the axial direction.

  According to this embodiment, since the second gear is configured to overlap the through hole in the axial direction, the lubricating oil can be directly scraped up toward the through hole. Thereby, the lubricating oil can be supplied more efficiently to the inner hole through the through hole.

  According to the further form of the lubrication structure which concerns on this invention, it is further provided with the 3rd rotary body supported rotatably by the inner hole via the bearing member. And it is comprised so that the lubricating oil which is scraped up and scattered by the 2nd rotary body may be supplied to a bearing member through a through-hole.

  According to this embodiment, lubrication is necessary, but the lubrication oil can be efficiently supplied to the bearing member disposed at a position where it is difficult to supply the lubrication oil. For example, in the case of an input reduction type transmission that includes an input shaft and an output shaft that is supported so as to be relatively rotatable via a pilot bearing inside the input shaft, the input shaft rotates in response to the rotation of the input shaft. Lubricating oil that is scraped up and scattered by a rotating body (such as a gear) on the counter shaft can be efficiently supplied to the pilot bearing through a through hole formed in the input shaft. In the case of an output reduction type transmission that includes an input shaft and an output shaft that supports the input shaft so as to be relatively rotatable via a pilot bearing, the output shaft rotates in accordance with the rotation of the input shaft. Lubricating oil that is scraped and scattered by a rotating body (such as a gear) on the counter shaft can be efficiently supplied to the pilot bearing through a through hole formed in the output shaft.

  According to a preferred embodiment of the transmission according to the present invention, an input shaft having an inner hole, a reduction drive gear provided on the input shaft, a counter shaft arranged in parallel with the input shaft, and provided on the counter shaft. A reduction driven gear that meshes with the reduction drive gear, and an output shaft that is rotatably supported in the inner hole via a bearing member. The transmission is configured to supply the lubricating oil that is scooped up and scattered by the reduction driven gear to the inner hole using the lubricating structure according to the present invention in any of the above-described aspects.

  According to the present invention, since the lubricating oil is supplied to the inner hole using the lubricating structure according to the present invention in any one of the aspects described above, the same effects as the effects exhibited by the lubricating structure of the present invention, for example, For example, it is possible to provide a reasonable lubricating structure capable of efficiently supplying lubricating oil to the inner hole.

  According to a preferred embodiment of the transmission according to the present invention, an input shaft having an inner hole, a drive gear provided on the input shaft, a counter shaft arranged in parallel with the input shaft, and a drive provided on the counter shaft. A driven gear that meshes with the gear, an output drive gear that is provided on the counter shaft, an output shaft that is rotatably supported in the inner hole via a bearing member, and an output that is provided on the output shaft and meshes with the output drive gear And a driven gear. The transmission is configured to supply the lubricating oil that is scooped up and scattered by the output drive gear to the inner hole using the lubricating structure according to the present invention in any of the above-described aspects.

  According to the present invention, since the lubricating oil is supplied to the inner hole using the lubricating structure according to the present invention in any one of the aspects described above, the same effects as the effects exhibited by the lubricating structure of the present invention, for example, For example, it is possible to provide a reasonable lubricating structure capable of efficiently supplying lubricating oil to the inner hole.

  According to a preferred embodiment of the lubricating method of the present invention, the first rotating body having the inner hole and the second rotating body that performs rotation corresponding to the rotation of the first rotating body are provided, and the second rotating body A lubrication method for supplying the scraped lubricating oil to the inner hole is configured. A through hole that penetrates from the outer peripheral surface of the rotating body to the inner hole is formed in the rotating body. Then, the lubricating oil scraped up and scattered by the second rotating body is captured by the through hole and supplied to the inner hole.

  According to the present invention, since the lubricating oil that is scooped up and scattered by the second rotating body is captured by the through hole and supplied to the inner hole, the lubricating oil that is scooped up and scattered by the second rotating body is And can be efficiently supplied to the inner hole of the first rotating body through the through hole. In addition, since a dedicated part for supplying lubricating oil to the inner hole of the first rotating body is unnecessary, the number of parts can be reduced, which is reasonable.

  ADVANTAGE OF THE INVENTION According to this invention, the rational lubrication structure which can supply lubricating oil efficiently to the internal hole of a rotary body can be provided.

It is sectional drawing which shows the outline of a structure of the transmission 1 to which the lubrication structure which concerns on embodiment of this invention is applied. It is an enlarged view which expands and shows the principal part of the lubricating structure which concerns on embodiment of this invention. It is XX sectional drawing of FIG. It is explanatory drawing which shows the locus | trajectory of the lubricating oil which can reach | attain directly the inner hole 2b of the input shaft 2 among the lubricating oil which the reduction driven gear RG 'scoops up. 4 is an explanatory diagram showing a relative locus obtained by converting a locus of lubricating oil that can reach the inner hole 2b of the input shaft 2 into a rotational coordinate system in the input shaft 2. FIG. It is explanatory drawing which shows a mode that the lubricating oil which is scraped up and scattered by the reduction driven gear RG 'is supplied to the inner hole 2b of the input shaft 2 through the through-hole 2c.

  Next, the best mode for carrying out the present invention will be described using examples.

  FIG. 1 is a cross-sectional view schematically showing a configuration of a transmission 1 to which a lubrication structure according to an embodiment of the present invention is applied. FIG. 2 is an enlarged view of a main part of the lubrication structure according to the embodiment of the present invention. FIG. 3 is a cross-sectional view of a portion of the input shaft 2 where the through hole 2c is formed. As shown in FIG. 1, the transmission 1 includes an input shaft 2, a counter shaft 4 arranged in parallel with the input shaft 2, an output shaft 6 arranged coaxially with the input shaft 2, an input shaft 2 and a counter. A reduction gear mechanism GM that connects the shaft 4, a speed change mechanism TM that connects the input shaft 2 or the counter shaft 4 and the output shaft 6, and a casing 8 that houses them. Note that lubricating oil for lubricating the components of the transmission 1 is stored in the casing 8. The input shaft 2 corresponds to the “first rotating body”, “first rotating shaft”, and “input shaft” in the present invention, and the counter shaft 4 corresponds to the “second rotating body”, “second rotating shaft” in the present invention. The output shaft 6 is an example of an implementation configuration corresponding to the “third rotating body” and the “output shaft” in the present invention. In the present embodiment, for convenience of explanation, the side (lower side in FIG. 1) on which the input shaft 2 is arranged in the major axis direction of the transmission 1 is defined as “front side” or “front”, and the output shaft 6 1 is defined as “rear side” or “rearward”.

  The input shaft 2 is a shaft to which power of an engine (not shown) is input via a clutch (not shown), and is rotatably supported by the casing 8 via a bearing B1. As shown in FIGS. 1 and 2, the rear portion of the input shaft 2 (the portion opposite to the side where the clutch is disposed) is configured as a hollow portion in which an inner hole 2b is formed. Further, a reduction drive gear RG is integrally formed at the rear end portion of the input shaft 2. The reduction drive gear RG is an example of an implementation configuration corresponding to the “rotor”, the “first gear”, and the “reduction drive gear” in the present invention.

  Further, as shown in FIG. 2, the input shaft 2 is formed with a diameter-enlarged portion 2 a that is larger in diameter than the other portions on the front side (the side where the clutch is disposed) from the reduction drive gear RG. In addition, the front end surface of the enlarged diameter portion 2a is brought into contact with the bearing B1, thereby positioning in the axial direction. A through hole 2c penetrating from the outer peripheral surface to the inner hole 2b is formed in the enlarged diameter portion 2a. As shown in FIG. 3, three through holes 2c are formed at equal intervals (120 ° intervals) in the circumferential direction. The through-hole 2c is a rear side in the rotational direction of the input shaft 2 with respect to each of the virtual radial direction lines RL of the three input shafts 2 arbitrarily drawn from the center CP of the input shaft 2 so that the central angle becomes 120 °. The center line CL is offset to the center line CL. The offset amount is set to a value such that the through hole 2c follows the relative locus of the lubricating oil that is scraped up by a reduction driven gear RG 'described later. Details of the setting of the through hole 2c will be described later. The through hole 2c corresponds to the “through hole” in the present invention, and the virtual radial line RL is an example of an implementation configuration corresponding to the “radial line” in the present invention. Further, the aspect in which the through hole 2c has the center line CL that is offset to the rear side in the rotation direction of the input shaft 2 with respect to the virtual radial direction line RL of the input shaft 2 is “the through hole of the rotating body of the present invention”. It is an example of the implementation structure corresponding to "having the center line offset in the rotation direction back of the rotary body with respect to the radial direction line."

  As shown in FIG. 1, the counter shaft 4 is rotatably supported by the casing 8 at the front end portion and the rear end portion via bearings B <b> 2 and B <b> 3. A reduction driven gear RG ′ that meshes with the reduction drive gear RG is integrally formed at the front end portion of the counter shaft 4. As shown in FIG. 2, the tooth width of the reduction driven gear RG ′ is larger than the tooth width of the reduction drive gear RG, and the reduction driven gear RG is mounted in a state where the input shaft 2 and the counter shaft 4 are assembled to the casing 8. 'Is configured to protrude from the reduction drive gear RG toward the bearing B1 (front side). That is, the reduction driven gear RG ′ is configured to overlap in the axial direction with the through hole 2 c in the enlarged diameter portion 2 a of the input shaft 2. Thus, since the reduction driven gear RG 'is configured to overlap the through hole 2c in the axial direction, the lubricating oil can be directly scraped up toward the through hole 2c. A reduction gear mechanism GM is constituted by the reduction driven gear RG 'and the reduction drive gear RG. The power input to the input shaft 2 is transmitted to the counter shaft 4 by the reduction gear mechanism GM. The reduction driven gear RG 'is an example of an implementation configuration corresponding to the "second rotating body", "second gear", and "deceleration driven gear" in the present invention. Further, the aspect in which the reduction driven gear RG ′ overlaps the through hole 2c in the enlarged diameter portion 2a of the input shaft 2 in the axial direction is “the second gear overlaps the through hole in the axial direction” in the present invention. It is an example of the implementation structure corresponding to an aspect.

  The output shaft 6 is a shaft for outputting power, and as shown in FIG. 1, one end is rotatably supported in the inner hole 2b of the input shaft 2 via a pilot bearing PB, and the other end is It is rotatably supported by the casing 8 via a bearing B4. The pilot bearing PB is disposed inside the reduction drive gear RG as shown in FIG. That is, the pilot bearing PB is disposed such that the front end portion in the axial direction is adjacent to the through hole 2c. As shown in FIG. 2, the reduction drive gear RG is formed with a through hole 2d penetrating from the tooth bottom surface to the inner hole 2b. The pilot bearing PB is an example of an implementation configuration corresponding to the “bearing member” in the present invention.

  As shown in FIG. 1, the speed change mechanism TM includes a plurality of drive gears G provided on the countershaft 4, a plurality of driven gears G ′ meshed with the drive gear G and provided on the output shaft 6, and a drive gear. G or driven gear G ′ is composed of a plurality of synchro mechanisms S that selectively fix the counter shaft 4 or the output shaft 6 to the counter shaft 4 or the output shaft 6 so as to be rotatable relative to the counter shaft 4 or the output shaft 6. Yes. The power transmitted to the counter shaft 4 is output to the output shaft 6 through the speed change mechanism TM.

  Next, the setting of the through hole 2c in the input shaft 2 will be described in detail. FIG. 4 is an explanatory diagram showing the locus of the lubricating oil that can reach the inner hole 2b of the input shaft 2 directly among the lubricating oil that the reduction driven gear RG ′ scoops up, and FIG. 5 reaches the inner hole 2b of the input shaft 2. 4 is an explanatory diagram showing a relative locus obtained by converting a possible locus of lubricating oil into a rotational coordinate system in the input shaft 2. FIG.

  As shown in FIG. 4, the locus of the lubricating oil scraped up by the reduction driven gear RG ′ is a straight line along the tangential direction of the reduction driven gear RG ′. Of the lubricating oil scraped up and scattered by the reduction driven gear RG ′, it was released in the range from the point P1 (position of the rotation angle θ1) to the point P2 (position of the rotation angle θ2) on the circumference of the reduction driven gear RG ′. The lubricating oil can reach the inner hole 2 b of the input shaft 2. In other words, of the lubricating oil that is scraped up and scattered by the reduction driven gear RG ′, the locus of the lubricating oil that can reach the inner hole 2b of the input shaft 2 is the outer peripheral surface of the reduction driven gear RG ′ and the inner hole of the input shaft 2. It exists in the range from the common external tangent line EL to 2b to the common internal tangent line IL. If the lubricating oil having a locus in the range is captured, the lubricating oil can be efficiently supplied to the inner hole 2b. Here, since the input shaft 2 rotates, the locus of the lubricating oil swung up by the reduction driven gear RG ′ when viewed from the input shaft 2, that is, the relative locus, has a curved shape as shown in FIG. 5. Eggplant.

  The relative locus of the lubricating oil having the curved shape can be obtained by converting the linear lubricating oil locus along the tangential direction of the reduction driven gear RG ′ shown in FIG. 4 into the rotational coordinate system of the input shaft 2. The relative trajectory is determined by determining the gear diameter of the reduction driven gear RG ′, the center-to-center distance between the input shaft 2 and the counter shaft 4, and the gear ratio of the reduction drive gear RG and the reduction driven gear RG ′. It is uniquely determined regardless of the number of rotations.

  As shown in FIGS. 4 and 5, the through hole 2 c is formed of lubricating oil existing in a range from the common outer tangent line EL to the common inner tangent line IL between the outer peripheral surface of the reduction driven gear RG ′ and the inner hole 2 b of the input shaft 2. Of the loci, the locus LC (solid line in FIG. 4) of the lubricating oil passing through the center CP of the input shaft 2 is converted into a relative locus LC ′ (solid line in FIG. 5) obtained by converting it into the rotational coordinate system of the input shaft 2. Set along.

  Specifically, the portion of the relative trajectory LC ′ obtained as described above crosses a cross section perpendicular to the axial direction of the input shaft 2 (hereinafter referred to as an axial perpendicular cross section) is linearly approximated, and the straight line approximated is defined as a through hole. It is defined as a center line CL of 2c. Thereby, it is set as the structure where the through-hole 2c follows the relative locus | trajectory of lubricating oil. As a result, the center line CL exists at a position offset to the rear side in the rotation direction of the input shaft 2 with respect to the virtual radial direction line RL of the input shaft 2.

  Next, the operation of supplying the lubricating oil to the pilot bearing PB in the transmission 1 configured as described above will be described. FIG. 6 is an explanatory diagram showing a state where the lubricating oil that is scraped up and scattered by the reduction driven gear RG 'is supplied to the inner hole 2b of the input shaft 2 through the through hole 2c. When the input shaft 2 is rotated by inputting power to the input shaft 2, the counter shaft 4 is rotated via the reduction gear mechanism GM. At this time, the reduction driven gear RG ′ scoops up the lubricating oil stored under the casing 8.

  The lubricating oil that is scraped up and scattered by the reduction driven gear RG ′ has a curved relative locus as shown in FIG. 6 when viewed from the input shaft 2. In the present embodiment, the through hole 2c formed in the input shaft 2 has a configuration along the curved relative trajectory, so that the lubricating oil that is scraped and scattered by the reduction driven gear RG ′ can be efficiently used. It can be captured by the through hole 2c and taken into the inner hole 2b. Thereby, sufficient lubricating oil can be supplied to the pilot bearing PB. The relative locus of the lubricating oil is determined by determining the gear diameter of the reduction driven gear RG ′, the distance between the centers of the input shaft 2 and the counter shaft 4 and the gear ratio of the reduction drive gear RG and the reduction driven gear RG ′. Since it is uniquely determined regardless of the rotation speed of the shaft 2, the capture of the lubricating oil by the through hole 2 c and the supply of the lubricating oil to the inner hole 2 b through the through hole 2 c depend on the rotation speed of the input shaft 2. There is nothing to do. That is, it is possible to ensure a stable lubricating performance from the low rotational speed range of the input shaft 2 to the high rotational speed range where more lubricating oil is required. The aspect in which the lubricating oil that is scooped up and scattered by the reduction driven gear RG ′ is captured by the through hole 2c and taken into the inner hole 2b is “the lubricating oil that is scooped up and scattered by the second rotating body” It is an example of the implementation structure corresponding to "capturing and supplying to an inner hole."

  According to the lubricating structure according to the embodiment of the present invention described above, the input hole 2c formed in the input shaft 2 follows the relative locus of the lubricating oil that is scraped and scattered by the reduction driven gear RG ′. Since the center line CL is offset from the imaginary radial direction line RL of the shaft 2 to the rear side in the rotation direction of the input shaft 2, the lubricating oil scraped up and scattered by the reduction driven gear RG ′ is efficiently penetrated. It can be taken into the inner hole 2b of the input shaft 2 through the hole 2c. Thereby, sufficient lubricating oil can be supplied to the pilot bearing PB. In addition, the number of parts can be reduced as compared with the conventional structure that requires dedicated parts only for supplying lubricating oil into the inner hole 2b of the input shaft 2, which is reasonable. Moreover, since the through hole 2c is only offset to the rear side in the rotation direction of the input shaft 2 with respect to the virtual radial direction line RL of the input shaft 2, a configuration that follows the relative locus of the scattered lubricating oil is easy. Can be realized.

  Further, according to the lubricating structure according to the embodiment of the present invention, since the through hole 2c is formed in the enlarged diameter portion 2a of the input shaft 2, the through hole 2c is formed in the reduction drive gear RG. Therefore, it is easy to configure the through hole 2c so as to follow the relative locus of the scattered lubricating oil. Further, since the scattered lubricating oil does not contact the tooth surface of the reduction drive gear RG and the like before reaching the through hole 2c, the flow of the lubricating oil into the through hole 2c is not hindered. Lubricating oil can be efficiently supplied into the inner hole 2b.

  Further, according to the lubrication structure according to the embodiment of the present invention, the reduction driven gear RG ′ is configured to overlap the through hole 2c in the enlarged diameter portion 2a of the input shaft 2 in the axial direction. Lubricating oil can be scraped directly toward 2c. Thereby, the lubricating oil can be supplied more efficiently to the inner hole through the through hole.

  In the present embodiment, the center CP of the input shaft 2 out of the locus of the lubricating oil existing in the range from the common outer tangent line EL to the common inner tangent line IL between the outer peripheral surface of the reduction driven gear RG ′ and the inner hole 2b of the input shaft 2. The through hole 2c is set on the relative locus LC ′ (solid line in FIG. 5) obtained by converting the locus LC of the lubricating oil passing through to the rotational coordinate system of the input shaft 2. The through hole 2c may be set on the relative locus obtained by converting the locus of the lubricating oil that does not pass through the center CP into the rotational coordinate system. Further, in addition to the through hole 2c on the relative locus LC ′ obtained by converting the locus LC of the lubricating oil passing through the center CP of the input shaft 2 into the rotational coordinate system of the input shaft 2, the center CP of the input shaft 2 is obtained. The through hole may be set on the relative locus obtained by converting the locus of the lubricating oil that does not pass into the rotating coordinate system. According to this embodiment, the lubricating oil can be supplied to the inner hole 2b more effectively.

  In the present embodiment, the line in which the relative locus of the scattered lubricating oil crosses the section perpendicular to the axis of the input shaft 2 is linearly approximated as the center line CL of the through hole 2c. A portion where the trajectory crosses the cross section perpendicular to the axis of the input shaft 2 may be the through hole 2c.

  In the present embodiment, three through holes 2c are formed in the circumferential direction of the enlarged diameter portion 2a in the input shaft 2, but the number of through holes 2c is not limited to this. For example, the through hole 2c may be configured to be formed only at one place in the enlarged diameter portion 2a, or may be formed at four or more positions. In addition, when a plurality of through holes 2c are formed in the circumferential direction, it is not always necessary to form them at regular intervals in the circumferential direction.

  In the present embodiment, the through hole 2c is configured to be formed at only one location in the axial direction of the enlarged diameter portion 2a in the input shaft 2, but the through hole 2c is formed at two or more locations in the axial direction of the enlarged diameter portion 2a. It does not matter as a configuration.

  In the present embodiment, the structure is applied to the lubrication of the pilot bearing PB in the transmission 1. However, the present invention is not limited to this. For example, the idle gear of the driven gear G ′ is connected via the inner hole 2 b of the input shaft 2. A bearing that is rotatably supported and a configuration that is applied to lubrication of the synchro mechanism S may be used. In this case, a through hole penetrating in the radial direction toward the bearing or the synchro mechanism S is formed from the inner hole 2b of the input shaft 2 or the inner hole formed in the output shaft 6 so as to communicate with the inner hole 2b. What is necessary is just to be the structure to do.

  In this embodiment, although it was set as the structure applied to the transmission 1, it is applicable not only to this but the apparatus and mechanism which need to supply lubricating oil to the internal hole of a rotary body.

DESCRIPTION OF SYMBOLS 1 Transmission 2 Input shaft 2a Wide diameter part 2b Inner hole 2c Through hole 2d Through hole 4 Counter shaft 6 Output shaft 8 Casing B1 Bearing B2 Bearing B3 Bearing B4 Bearing GM Reduction gear mechanism TM Transmission mechanism RG Reduction drive gear RG 'Reduction driven gear CL Center line RL Virtual radial direction line PB Pilot bearing G Drive gear G 'Driven gear S Synchro mechanism EL Common external tangent line IL Common internal tangent line P1 point P2 point θ1 rotation angle θ2 rotation angle LC locus LC' relative locus CP Center of input shaft

Claims (8)

A first rotating body having an inner hole; and a second rotating body that rotates in accordance with the rotation of the first rotating body, and supplies the lubricating oil scraped up by the second rotating body to the inner hole. A lubricating structure
In the first rotating body, a through hole penetrating from the outer peripheral surface of the first rotating body to the inner hole is formed,
The through hole is configured so that the lubricating oil scraped up and scattered by the second rotating body follows a relative locus that is a locus of the lubricating oil when viewed from the rotating first rotating body. Construction.   2. The lubricating structure according to claim 1, wherein the through hole has a center line that is offset from the radial line of the first rotating body to the rear in the rotational direction of the first rotating body. The first rotating body has a first rotating shaft and a first gear provided on the first rotating shaft,
The second rotating body has a second rotating shaft arranged in parallel to the first rotating shaft, and a second gear provided on the second rotating shaft and meshing with the first gear,
The lubricating structure according to claim 1, wherein the through hole is formed in the first rotating shaft. The through hole is formed adjacent to the first gear;
The lubricating structure according to claim 3, wherein the second gear is configured to overlap the through hole in the axial direction. A third rotating body rotatably supported by the inner hole via a bearing member;
The lubricating structure according to any one of claims 1 to 4, wherein the lubricating oil that is scraped up and scattered by the second rotating body is supplied to the bearing member through the through hole. An input shaft having an inner hole;
A reduction drive gear provided on the input shaft;
A counter shaft arranged parallel to the input shaft;
A reduction driven gear provided on the counter shaft and meshing with the reduction driving gear;
An output shaft rotatably supported by a bearing member in the inner hole;
With
A transmission configured to supply lubricating oil that is scraped and scattered by the reduction driven gear to the inner hole using the lubricating structure according to any one of claims 1 to 5. An input shaft having an inner hole;
A drive gear provided on the input shaft;
A counter shaft arranged parallel to the input shaft;
A driven gear provided on the counter shaft and meshing with the driving gear;
An output drive gear provided on the counter shaft;
An output shaft rotatably supported by a bearing member in the inner hole;
An output driven gear provided on the output shaft and meshing with the output driving gear;
With
A transmission configured to supply lubricating oil that is scraped and scattered by the output drive gear to the inner hole using the lubricating structure according to any one of claims 1 to 5. A first rotating body having an inner hole; and a second rotating body that rotates in accordance with the rotation of the first rotating body, and supplies the lubricating oil scraped up by the second rotating body to the inner hole. A lubricating method for
In the first rotating body, a through hole penetrating from the outer peripheral surface of the first rotating body to the inner hole is formed,
The lubricating oil that is scraped up and scattered by the second rotating body is captured by the through-hole configured to follow a relative locus that is the locus of the lubricating oil when viewed from the rotating first rotating body. Lubrication method for supplying to the inner hole.