CN204610800U - Speed changer - Google Patents

Abstract

The utility model provides a kind of speed changer.On the running shaft of this speed changer, be provided with the axial bore of axial direction and the multiple radial holes for the machine oil imported in this axial bore being sent to radial outside, multiple radial hole is in the mutually isolated configuration of the axial direction of running shaft, on the internal face of axial bore, be provided with the same number of spiral chute with radial hole, each spiral fluted the inner is communicated with one to one with the internal side diameter opening of each radial hole.Based on said structure, need not send into interior of rotating shaft the engine oil quantity that too much machine oil also fully can guarantee to import to running shaft outside diameter.

Description

transmission

technical field

The utility model relates to a transmission.

Background technique

Patent Document 1 discloses a lubrication structure for a vehicle transmission. A hollow member with a closed inner end is embedded in the center hole of the input shaft of the transmission. Oil holes extending in the radial direction are provided at several locations in the axial direction of the input shaft and several locations in the axial direction of the hollow member. The oil hole of the input shaft and the oil hole of the hollow member are located at positions corresponding to each other and communicate with each other. Moreover, a helical guide groove is formed on the inner wall surface of the central hole of the hollow member.

In the above structure, the oil introduced from one end of the hollow member in the axial direction of the central hole enters the guide groove, and then is sent to the other end of the hollow member in the axial direction of the central hole. However, since the guide groove is not connected to the plurality of oil holes of the hollow member, the oil fed into the guide groove cannot necessarily be supplied to the plurality of oil holes of the hollow member.

That is, in the above-mentioned Patent Document 1, since the oil introduced into the central hole of the hollow member may not be effectively sent to the plurality of oil holes of the hollow member, as in the case where the above-mentioned helical guide groove is not provided, Oil needs to be excessively fed into the center hole of the hollow member. As a result, it is necessary to use a mechanism for excessively introducing the oil, resulting in an increase in equipment cost and an increase in weight.

[Patent Document 1]: Japanese Unexamined Patent Publication No. 2013-249913

Utility model content

In view of the above-mentioned technical problems, an object of the present invention is to provide a transmission that can sufficiently ensure the amount of oil introduced to the outer diameter side of the rotating shaft without sending too much oil into the rotating shaft.

As a technical solution to solve the above-mentioned technical problems, the utility model provides a transmission. On the rotating shaft of the transmission, an axial hole in the axial direction is provided, and the engine oil introduced into the axial hole is sent to the diameter. A plurality of radial holes facing the outside, the plurality of radial holes are arranged in isolation from each other in the axial direction of the rotating shaft, and on the inner wall surface of the axial hole, there are provided with the same number of radial holes spiral grooves, the inner ends of each spiral groove are connected one-to-one with the inner diameter side openings of each radial hole.

The transmission of the present invention having the above structure has the following advantages. That is, the engine oil introduced from one end of the axial hole in the axial direction flows into each helical groove due to the centrifugal force of the rotation of the rotating shaft, and the oil entering each helical groove is subjected to axial thrust generated by the rotation of the rotating shaft. , and has been sent to the opening of the inner diameter side of each radial hole, and then sent to the radial outside of the rotating shaft through each radial hole.

In this way, the engine oil can be efficiently supplied into each radial hole, so it is not necessary to send too much engine oil into the axial hole as in the past, so that there is no need to use a device for introducing too much oil, etc. It is beneficial to reduce equipment cost and reduce weight.

In addition, in the above-mentioned transmission of the present invention, preferably, the hole center line of the axial hole coincides with the central axis of the rotating shaft. By adopting this structure, the rotational centrifugal force of the oil acting on the axial hole is stronger, and the oil flows into each spiral groove more easily.

In addition, in the above-mentioned transmission of the present invention, preferably, the depth of the spiral groove is set to gradually become deeper from the oil introduction side toward the radial hole side. With this structure, the oil in the helical groove can flow to the radial hole more easily.

Description of drawings

FIG. 1 is a side view showing main parts of a transmission according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view showing a part of the transmission shown in Fig. 1 .

FIG. 3 is a cross-sectional view showing a cross-section of a single rotating shaft of the transmission shown in FIG. 1 .

Detailed ways

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

1 to 3 show an embodiment of the present utility model. The rotating shaft 1 in this embodiment is, for example, an input shaft provided in a vehicle transmission, but may also be an output shaft provided in a vehicle transmission.

Specifically, a plurality of transmission gears 2 are provided on the outer diameter side of the rotary shaft 1 . A through hole (referred to as an axial hole) 3 penetrating in the axial direction is provided inside the rotating shaft 1 . Through holes (referred to as radial holes) (4, 5) penetrating in the radial direction are provided at several positions (for example, two positions) in the axial direction of the rotating shaft 1 .

Here, the axial hole 3 is arranged along the central axis of the rotating shaft 1 (that is, the center line of the axial hole 3 coincides with the central axis of the rotating shaft 1), and the radial hole 4 and the radial hole 5 can be arranged according to Need to be arranged in the appropriate position, and its number is not limited. The axial hole 3 , the radial hole 4 and the radial hole 5 constitute an oil supply passage for supplying oil to the transmission gear 2 .

Specifically, the radial holes 4 and the radial holes 5 are arranged at a predetermined distance in the axial direction of the rotary shaft 1 . In order to effectively send the engine oil introduced into the axial hole 3 into the radial hole 4 and the radial hole 5, as shown in FIG. The spiral grooves (6,7) with the same number of holes (4,5).

One end (outer end) of the spiral groove 6 and the spiral groove 7 is located at one end of the axial direction of the rotating shaft 1, and the other end (inner end) of the spiral groove 6 and the spiral groove 7 is connected to the radial hole 4 and the radial hole 5 respectively. on the inner diameter side opening. Thereby, the inner end of the spiral groove (6, 7) communicates with the inner diameter side opening of the radial hole (4, 5) one-to-one (that is, the inner end of the spiral groove 6 communicates with the inner diameter side opening of the radial hole 4; The inner end of the spiral groove 7 communicates with the inner diameter side opening of the radial hole 5).

The width, depth and inclination angle of the spiral groove 6 are the same as those of the spiral groove 7 . Here, the depths of the helical grooves 6 and 7 are set to gradually become deeper from the oil introduction side toward the radial holes 4 and 5 . In FIG. 2 and FIG. 3 , in order to distinguish the spiral groove 6 from the spiral groove 7 , the spiral groove 6 is shaded with dots.

Seen from one end of the axial hole 3 in the axial direction (ie, the oil introduction side), the spiral grooves 6 and 7 may be formed in a clockwise or counterclockwise direction.

Next, the oil supply method will be described. The oil is fed into the axial hole 3 from one end in the axial direction of the rotary shaft 1 , and flows toward the other end in the axial direction of the axial hole 3 .

Here, the oil introduced into the axial hole 3 is thrown onto the inner wall surface of the axial hole 3 due to the rotational centrifugal force of the rotating shaft 1, flows toward the other end in the axial direction, and flows into the spiral groove 6, the spiral groove within 7.

The oil flowing into the helical grooves 6 and 7 is subjected to the axial thrust generated by the rotation of the rotating shaft 1, and is always sent to the openings on the inner diameter side of the radial hole 4 and the radial hole 5, and then, It reaches the transmission gear 2 side through the radial hole 4 and the radial hole 5 .

In addition, the oil flowing into the helical groove 6 and the helical groove 7 is subjected to an inertial force that tends to stay in place with respect to the rotation of the rotating shaft 1. As a component of the inertial force, there is The component force in the vertical direction; and the component force in the direction parallel to the spiral groove 6 and the spiral groove 7. Here, the component force in the direction parallel to the helical groove 6 and the helical groove 7 becomes an acting force that makes the oil in the helical groove 6 and the helical groove 7 flow to the other end of the axial hole 3 in the axial direction. The component force in the direction parallel to the spiral groove 6 and the spiral groove 7 will occur at any position of the spiral groove 6 and the spiral groove 7. The smaller the inclination angle of the spiral groove 6 and the spiral groove 7 relative to the central axis of the rotating shaft 1, the greater the above-mentioned component force. The greater the force, the stronger the effect of conveying the oil.

As described above, since the oil introduced from one end of the axial hole 3 in the axial direction can efficiently flow into the radial hole 4 and the radial hole 5, there is no need to send it into the axial hole 3 as in the past. Even with a large amount of engine oil, the amount of engine oil introduced to the outer diameter side of the rotary shaft 1 can be sufficiently ensured. Therefore, a mechanism for excessively introducing engine oil can be omitted, which contributes to reduction of equipment cost and equipment weight.

In addition, it is not necessary to necessarily set the width and depth of the respective helical grooves (6, 7) to be the same, and they may be set individually.

In addition, for example, when there are three or more spiral grooves (not shown), the intervals between them may be set to be non-equal intervals.

Furthermore, for example, one helical groove may communicate with one or more radial holes (not shown). In addition, when there are more than two helical grooves, one helical groove may communicate with one radial hole, and the remaining helical grooves may communicate with two or more radial holes (not shown).

In addition, for example, in the case where three or more radial holes are provided at predetermined intervals in the axial direction of the rotating shaft 1, in addition to the radial holes on the oil introduction side, the inner (oil The remaining radial holes on the opposite side to the introduction side) are individually connected to the helical groove (not shown). In this case, a sufficient amount of engine oil can be introduced into the inner radial hole, which is difficult for engine oil to reach conventionally.

Claims (3)

1. A speed changer, characterized in that: On the rotating shaft of the transmission, an axial hole in the axial direction and a plurality of radial holes for sending the oil introduced into the axial hole to the radially outer side are provided, The plurality of radial holes are arranged in isolation from each other in the axial direction of the rotating shaft, The inner wall surface of the axial hole is provided with the same number of spiral grooves as the radial holes, The inner ends of the respective helical grooves are in one-to-one communication with the inner diameter side openings of the respective radial holes. 2. The transmission according to claim 1, characterized in that: The center line of the axial hole coincides with the central axis of the rotating shaft. 3. The transmission according to claim 1 or 2, characterized in that: The depth of the spiral groove is set to gradually become deeper from the oil introduction side toward the radial hole side.