JP2013036492A - Lubricating device for transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a shortage of lubricating oil in a first chamber and a second chamber which are divided by a vertical wall in a casing of a transmission.SOLUTION: In this lubricating device for the transmission, inside of the casing 90 of the transmission is partitioned into a front chamber Ra (first chamber) and a rear chamber Rb (second chamber) by the vertical wall 91. Transmission gears and lubricating oil are stored in the front chamber Ra (first chamber) and transmission gears and lubricating oil are stored in the rear chamber Rb (second chamber). The lubricating oil within the front chamber Ra (first chamber) and the lubricating oil within the second chamber Rb (second chamber) can flow through a communication hole 91a formed on a bottom of the vertical wall 91. The communication hole 91a includes a control valve 80 which controls flowing of the lubricating oil from the first chamber to the second chamber caused by inertial force and flowing of the lubricating oil from the second chamber to the first chamber caused by inertial force.

Description

  The present invention relates to a transmission lubrication device applied to a vehicle, and in particular, a casing of a transmission is partitioned into a first chamber and a second chamber by a vertical wall, and a transmission gear and lubricating oil are provided in the first chamber. (The one that is scraped up by the transmission gear in the first chamber and at least lubricates the meshing portion of the transmission gear) is accommodated, and the transmission gear and lubricating oil (by the transmission gear in the second chamber) are stored in the second chamber. The present invention relates to a lubrication device for a transmission in which an object that at least lubricates a meshing portion of the transmission gear is housed.

  This type of transmission lubrication device is described in, for example, Patent Document 1 below, and the lubricating oil in the first chamber (for example, the front chamber) is communicated with the lubricating oil through the communication hole formed in the bottom of the vertical wall. Lubricating oil in the second chamber (for example, the rear chamber) is configured to be able to flow. The transmission described in Patent Document 1 is configured such that the shaft support portion of the transmission gear that is rotatably assembled to the output shaft is lubricated by the lubricating oil supplied from the oil pump. Yes.

JP 11-294565 A

  In the transmission described in Patent Document 1, for example, when the vehicle is traveling at a rapid acceleration or traveling on a steep slope, the lubrication in the first chamber (front chamber) is made through a communication hole formed at the bottom of the vertical wall. Oil may flow into the second chamber (rear chamber) and move, and the lubricating oil in the first chamber (front chamber) may become insufficient. Further, for example, when the vehicle is running at a sudden deceleration or running down a steep slope, the lubricating oil in the second chamber (rear chamber) flows into the first chamber (front chamber) through the communication hole formed at the bottom of the vertical wall. And the lubricating oil in the second chamber (rear chamber) may become insufficient.

  It is an object of the present invention to eliminate a shortage of lubricating oil in the first chamber and the second chamber by configuring a predetermined amount of lubricating oil to be stored in the first chamber and the second chamber during any travel described above. There is to do. In order to achieve this object, in the present invention, the inside of the casing of the transmission is partitioned into a first chamber and a second chamber by a vertical wall, and the transmission gear and lubricating oil are accommodated in the first chamber, The transmission gear and the lubricating oil are accommodated in the second chamber, and the lubricating oil in the first chamber and the lubricating oil in the second chamber can be circulated through a communication hole formed in the bottom of the vertical wall. In the transmission lubrication device, the flow of the lubricating oil is controlled by the inertia force when the lubricating oil flows from the first chamber to the second chamber through the communication hole, and from the second chamber to the first chamber. A control valve is provided in the chamber for controlling the flow of the lubricating oil when the lubricating oil flows by inertia.

  For this reason, in the transmission lubrication device according to the present invention, in the transmission, when the first chamber is disposed in the vehicle such as the front chamber and the second chamber is defined as the rear chamber, for example, Lubricating oil in the first chamber (front chamber) flows with inertial force into the second chamber (rear chamber) through the communication hole formed in the bottom of the vertical wall during rapid acceleration traveling or steep climbing. Sometimes, the flow of the lubricating oil is controlled by the control valve, and a predetermined amount of lubricating oil is stored in the first chamber and the second chamber, respectively. In addition, for example, when the vehicle is traveling at a sudden deceleration or traveling down a steep slope, the lubricating oil in the second chamber (rear chamber) is directed toward the first chamber (front chamber) through the communication hole formed in the bottom of the vertical wall. When the fluid flows with inertial force, the flow of the lubricating oil is controlled by the control valve, and a predetermined amount of lubricating oil is stored in the first chamber and the second chamber, respectively. Therefore, a predetermined amount of lubricating oil is stored in each of the first chamber and the second chamber during any of the above-described travels. For this reason, it is possible to eliminate the lack of lubricating oil in the first chamber and the second chamber.

  In carrying out the above-described present invention, the control valve is made of a material having a higher density than the density of the lubricating oil and is movable in the communication hole by an inertial force. The control valve is moved from the communication hole to the first chamber. A first valve hole extending toward the first valve hole, and a first valve seat provided in the first valve hole on which the inertia valve body can be seated / separated, and in cooperation with the inertia valve body. A first valve seat member for controlling the flow of lubricating oil from the two chambers to the first chamber; a second valve hole extending from the communication hole toward the second chamber; and the second valve hole. The inertia valve body has a second valve seat that can be seated and separated, and controls the flow of lubricating oil from the first chamber to the second chamber in cooperation with the inertia valve body. A valve seat member is provided, and when the inertial force acting toward the first chamber is equal to or greater than a first set value, the inertia valve body is seated on the first valve seat and the first set value is not The inertia valve body is set so as to be separated from the first valve seat, and the inertia valve body is moved to the second chamber when the inertial force acting toward the second chamber side is equal to or greater than a second set value. It is also possible to set the inertia valve body so as to be separated from the second valve seat when it is seated on the two valve seats and less than the second set value. In this case, the control valve provided in the communication hole of the casing can be simply configured and can be manufactured at low cost.

  Further, in this case, each valve seat may be provided with a passage that allows a predetermined amount of lubricating oil to flow even when the inertia valve body is seated. In this case, the lubricating oil in the casing can flow from the first chamber to the second chamber or from the second chamber to the first chamber even if the inertia valve body continues to sit on each valve seat for a long time, As compared with the case where the lubricating oil does not flow between the two chambers, the temperature rise of the lubricating oil in each chamber can be effectively suppressed.

1 is a schematic view schematically illustrating an embodiment of a transmission lubrication device according to the present invention. It is an enlarged view of the control valve shown in FIG. It is action | operation explanatory drawing of the control valve shown in FIG. It is the figure which showed the deformation | transformation embodiment of the control valve shown in FIG. It is the figure which showed the relationship between the inertia valve body and valve seat of deformation | transformation embodiment shown in FIG.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 schematically shows an embodiment of a transmission lubrication device according to the present invention. In the transmission 100 shown in FIG. 1, an input shaft 10 and an output shaft 20 that extend along the longitudinal direction of the vehicle. Are arranged so as to be coaxial and relatively rotatable, and a countershaft 30 is arranged in parallel to these shafts 10 and 20. A casing 90 that rotatably supports the shafts 10, 20, and 30 includes a vertical wall 91. The vertical wall 91 allows the casing 90 to have a front chamber Ra (first chamber) and a rear chamber Rb (first chamber). 2 rooms).

  In the transmission 100 shown in FIG. 1, the input gear pair Gi, the first speed gear pair G1, the second speed gear pair G2, the third speed gear pair G3, the 1-2 speed change mechanism C1, and the 3-4 speed change. The mechanism C2 is accommodated in the front chamber Ra, and a required amount of lubricating oil Oa is accommodated in the front chamber Ra. On the other hand, the fifth gear pair G5, the reverse gear train Gr, and the 5-R transmission mechanism C3 are accommodated in the rear chamber Rb, and a required amount of lubricating oil Ob is accommodated in the rear chamber Rb. Further, the lubricating oil Oa in the front chamber Ra and the lubricating oil Ob in the rear chamber Rb are configured to be able to flow through the communication hole 91 a formed in the bottom of the vertical wall 91.

  By the way, in this embodiment, the control valve 80 is provided in the communication hole 91a. The control valve 80 controls the flow of the lubricating oil when the lubricating oil flows from the front chamber Ra to the rear chamber Rb by the inertial force, and also when the lubricating oil flows from the rear chamber Rb to the front chamber Ra by the inertial force. As shown in an enlarged view in FIG. 2, an inertia valve body 81 and a first valve seat member 82 provided on the front chamber Ra side from the inertia valve body 81 are controlled. And a second valve seat member 83 provided on the rear chamber Rb side from the inertia valve body 81.

  The inertia valve body 81 is made of a material having a density higher than the density of the lubricating oils Oa and Ob described above, and is large in the communication hole 91a and the first valve hole 82a and the second valve hole 83a described later by inertia force in the vehicle longitudinal direction. This is a ball valve body that can move (roll) a diameter portion (a portion larger than the diameter of the inertia valve body 81) in the front-rear direction.

  The first valve seat member 82 is provided with a frustoconical first valve hole 82a extending from the communication hole 91a toward the front chamber Ra, and the inertia valve body 81 is seated and separated by the first valve hole 82a. It has a seatable circular first valve seat 82b and controls the flow of lubricating oil from the rear chamber Rb to the front chamber Ra in cooperation with the inertia valve body 81.

  The second valve seat member 83 is provided with a truncated cone-shaped second valve hole 83a extending from the communication hole 91a toward the rear chamber Rb, and the inertia valve body 81 is seated and separated by the second valve hole 83a. It has a seatable circular second valve seat 83b, and controls the flow of lubricating oil from the front chamber Ra to the rear chamber Rb in cooperation with the inertia valve body 81.

  Further, in the control valve 80 of this embodiment, the inertia valve body 81 is seated on the first valve seat 82b when the inertial force forward of the vehicle acting toward the front chamber Ra is greater than or equal to the first set value. The inertia valve body 81 is set so as to separate from the first valve seat 82b when it is less than one set value. The inertia valve body 81 is seated on the second valve seat 83b when the vehicle rear inertia force acting toward the rear chamber Rb is equal to or greater than the second set value, and the inertia valve is less than the second set value. The body 81 is set so as to be separated from the second valve seat 83b.

  In this embodiment, the first valve hole 82a and the first valve seat 82b and the second valve hole 83a and the second valve seat 83b described above are provided coaxially with respect to the communication hole 91a. Further, the second valve seat member 83 and the second valve seat member 83 are formed in the same shape so that the first set value and the second set value described above are the same. The first setting value and the second setting value described above may be set differently.

  In this embodiment configured as described above, the control valve 80 is in the state shown in FIG. 2 during normal times (for example, when traveling at a constant speed on a flat road), and the inertia valve body 81 is the first valve seat 82b. The lubricating oil Oa in the front chamber Ra and the lubricating oil Ob in the rear chamber Rb can flow through the communication hole 91a formed in the bottom of the vertical wall 91, A required amount of lubricating oil Oa is accommodated in the front chamber Ra, and a required amount of lubricating oil Ob is accommodated in the rear chamber Rb.

  For this reason, the lubricating oil Oa stored in the front chamber Ra is scraped up by the counter gears in the respective transmission gear pairs Gi, G1, G2, G3 in the front chamber Ra, and the transmission gear pairs Gi, G1, G2, It is possible to lubricate at least the meshing portion of G3. Further, the lubricating oil Ob stored in the rear chamber Rb is scraped up by the counter gear of the fifth speed gear pair G5, and at least the meshing portions of the fifth speed gear pair G5 and the reverse gear train Gr can be lubricated. It is.

  In this embodiment, for example, when the vehicle is traveling at a rapid acceleration or traveling up a steep slope (when the inertial force acting toward the rear chamber Rb is equal to or greater than the second set value), the control valve 80 is shown in FIG. In the state shown in (a), the inertia valve body 81 is seated on the second valve seat 83b and is separated from the first valve seat 82b. For this reason, when the lubricating oil Oa in the front chamber Ra flows into the rear chamber Rb with an inertia force through the communication hole 91a formed in the bottom of the vertical wall 91, the flow of the lubricating oil is controlled by the control valve 80. Controlled (regulated), a predetermined amount of lubricating oil is stored in each of the front chamber Ra and the rear chamber Rb.

  Further, for example, when the vehicle is running at a sudden deceleration or running down a steep slope (when the inertial force acting toward the front chamber Ra side is equal to or higher than the first set value), the control valve 80 is shown in FIG. In this state, the inertia valve body 81 is seated on the first valve seat 82b and is separated from the second valve seat 83b. For this reason, when the lubricating oil Ob in the rear chamber Rb flows into the front chamber Ra by an inertia force through the communication hole 91a formed in the bottom portion of the vertical wall 91, the flow of the lubricating oil is controlled by the control valve 80. Controlled (regulated), a predetermined amount of lubricating oil is stored in each of the front chamber Ra and the rear chamber Rb.

  Therefore, a predetermined amount of lubricating oil is stored in each of the front chamber Ra and the rear chamber Rb during any travel described above. For this reason, it is possible to eliminate the shortage of lubricating oil in the front chamber Ra and the rear chamber Rb.

  In this embodiment, the control valve 80 includes an inertia valve body 81, a first valve seat member 82, and a second valve seat member 83. For this reason, the control valve 80 provided in the communication hole 91a of the casing 90 can be configured simply and can be manufactured at low cost. In this embodiment, since the first valve seat member 82 and the second valve seat member 83 are formed in the same shape, the first valve seat member (82) and the second valve seat member (83) have different shapes. Compared with the case where it is formed, it can be manufactured at a low cost.

  The present invention is not limited to the above embodiment, and various modifications can be employed within the scope of the present invention. For example, in the above embodiment, as shown in FIG. 2, the inertia valve body 81 is a ball valve body, the first valve hole 82a and the second valve hole 83a are both frustoconical, and the inertia valve body 81 is circular. Although it was configured so that the lubricating oil does not flow when seated on the first valve seat 82b or the second valve seat 83b, as illustrated in FIG. 4, the inertia valve body 181 of the control valve 180 is a ball valve body. When the first valve hole 182a and the second valve hole 183a are both in the shape of a truncated pyramid, and the inertia valve body 181 is seated on the first valve seat 182b or the second valve seat 183b having a square shape (see FIG. 5). ), And configured so that the lubricating oil flows between the inertia valve body 181 and the first valve seat 182b or the second valve seat 183b (allowing a predetermined amount of lubricating oil to flow even when the inertia valve body is seated) A structure is provided in which each valve seat has a passage to be Are embodiments have been) it is also possible. In place of the configuration illustrated in FIG. 4, each valve seat 82b, 83b shown in FIG. 2 has a passage (communication groove) that allows a predetermined amount of lubricating oil to flow even when the inertia valve body 81 is seated on each valve. It is also possible to provide the seats 82b and 83b.

  In these cases, even if the inertia valve body (181) continues to sit on the valve seats (182b, 183b) for a long time, the lubricating oil in the casing 90 is removed from the first chamber to the second chamber or from the second chamber. It is possible to flow into one chamber, and it is possible to effectively suppress the temperature rise of the lubricating oil in each chamber as compared with the case where the lubricating oil does not flow between the two chambers. In an embodiment in which a passage that allows a predetermined amount of lubricant to flow even when the inertia valve is seated is provided in each valve seat, a passage for returning (returning) the lubricant is provided. It is desirable to carry out by providing it on a vertical wall.

  In the above embodiment, the description of the lubrication of the shaft support portion of each transmission gear that is rotatably assembled to the output shaft 20 is omitted. However, it is described in Patent Document 1 (Japanese Patent Laid-Open No. 11-294565). As in the case of the transmission, it is possible to perform the configuration by being lubricated with the lubricating oil supplied from the oil pump.

  Further, in the above embodiment, the present invention is implemented for a forward 5 speed / reverse 1 speed transmission. However, in the present invention, the casing of the transmission is partitioned into a first chamber and a second chamber by a vertical wall. The transmission chamber and the lubricating oil are accommodated in the first chamber, the transmission gear and the lubricating oil are accommodated in the second chamber, and the lubrication in the first chamber is performed through a communication hole formed in the bottom of the vertical wall. This can be implemented as long as the transmission is configured to allow oil and lubricating oil in the second chamber to circulate. For example, the transmission may be similarly or appropriately changed for a forward 6-speed / reverse 1-speed transmission. It is possible. Moreover, in the said embodiment, although this invention was implemented to the transmission with which a 1st chamber and a 2nd chamber are arrange | positioned along the front-back direction of a vehicle, a 1st chamber and a 2nd chamber are along the left-right direction of a vehicle. The present invention can also be implemented in a transmission that is arranged.

  DESCRIPTION OF SYMBOLS 10 ... Input shaft, 20 ... Output shaft, 30 ... Counter shaft, 80 ... Control valve, 81 ... Inertia valve body, 82 ... 1st valve seat member, 82a ... 1st valve hole, 82b ... 1st valve seat, 83 ... Second valve seat member, 83a ... second valve hole, 83b ... second valve seat, 180 ... control valve, 181 ... inertial valve element, 182 ... first valve seat member, 182a ... first valve hole, 182b ... first Valve seat, 183 ... second valve seat member, 183a ... second valve hole, 183b ... second valve seat, 90 ... casing, 91 ... vertical wall, 91a ... communication hole, Ra ... front chamber (first chamber), Rb ... rear chamber (second chamber), Gi ... input gear pair, G1 ... first speed gear pair, G2 ... second speed gear pair, G3 ... third speed gear pair, G5 ... fifth speed gear pair, Gr ... Reverse gear train, C1... 1-2 transmission mechanism, C2... 3-4 transmission mechanism, C3. 00 ... transmission, Oa ... the front room of the lubricating oil, Ob ... the back room of the lubricating oil

Claims (3)

The casing of the transmission is partitioned into a first chamber and a second chamber by a vertical wall, and the transmission gear and the lubricating oil are accommodated in the first chamber, and the transmission gear and the lubricating oil are accommodated in the second chamber. And a lubricating device for a transmission configured to allow the lubricating oil in the first chamber and the lubricating oil in the second chamber to flow through a communication hole formed in a bottom portion of the vertical wall,
When the lubricating oil flows from the first chamber to the second chamber with an inertial force in the communication hole, the flow of the lubricating oil is controlled, and the lubricating oil from the second chamber to the first chamber has an inertial force. A lubricating device for a transmission provided with a control valve for controlling the flow of the lubricating oil when flowing in the engine. The transmission lubrication device according to claim 1,
The control valve is made of a material having a higher density than the density of the lubricating oil and is movable in the communication hole by an inertial force. The first valve extends from the communication hole toward the first chamber. And a first valve seat provided in the first valve hole and capable of seating / separating the inertia valve body, and from the second chamber to the first chamber in cooperation with the inertia valve body. A first valve seat member for controlling the flow of the lubricating oil, a second valve hole extending from the communication hole toward the second chamber, and the inertia valve body seated on the second valve hole. A second valve seat member that has a second valve seat that can be separated and controls the flow of lubricating oil from the first chamber to the second chamber in cooperation with the inertia valve body; The inertia valve body is seated on the first valve seat when the inertial force acting toward the first chamber is greater than or equal to a first set value, and when the inertial valve body is less than the first set value, the inertia valve body is It is set so as to be separated from the valve seat, and when the inertial force acting toward the second chamber side is equal to or greater than a second set value, the inertia valve body is seated on the second valve seat and less than the second set value. A lubricating device for a transmission in which the inertia valve body is set so as to separate from the second valve seat at the time. The transmission lubrication device according to claim 2,
A lubricating device for a transmission, wherein each valve seat is provided with a passage that allows a predetermined amount of lubricating oil to flow even when the inertia valve body is seated.

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