JP6701820B2 - Oil supply mechanism - Google Patents

Description

  The present invention relates to an oil supply mechanism for supplying oil to a control box provided on a transmission case of a transmission.

  A control box for controlling the connection and disconnection of each gear in the transmission case is provided above the transmission case of the transmission. The control box accommodates a select/shift device for selecting a gear stage and connecting/disconnecting (shifting) the selected gear stage.

  This select/shift device is provided with a detent mechanism for positioning the select position and the shift position and a shift sensor for detecting the shift position.

  The detent mechanism consists of a detent groove provided on the shaft and a ball click device that engages and disengages with the detent groove for positioning, and the sensor has a device that follows the movement of the shaft. Needs refueling as well as sleeves.

  Conventionally, the gears in the transmission case are lubricated by the gears of each stage connected to the counter shaft scraping up the oil, and the oil is fed into the control box, so that the detent mechanism and the sensor are oiled. Is supplied and lubricated.

JP, 2008-157266, A JP 2012-117580 A JP 2001-74128 A

  However, the detent mechanism and the sensor are provided at the end of the shaft, and even if the oil is simply scraped up into the control box to supply oil, there is no guarantee that the oil will be reliably supplied to the detent mechanism and the sensor.

  In particular, in a select/shift device that performs selection and shift with one mechanism, the amount of oil supplied to the detent mechanism and the sensor becomes very small, and there is a risk that the detent mechanism will rust.

  Therefore, when a large amount of oil is scraped up and supplied to the control box, there is a problem that the oil leaks from the breather for sucking and discharging air provided in the control box.

  Therefore, an object of the present invention is to solve the above problems and provide an oil supply mechanism capable of reliably supplying oil to a detent mechanism and a sensor provided in a control box.

  In order to achieve the above object, the present invention provides a control box which is provided on an upper part of a transmission transmission case and which houses a select/shift device for controlling the transmission, and a control box which is provided on an upper surface of the control box. There is provided an oil supply mechanism including oil scraped up from the side and an oil guide path for guiding the oil to a detent mechanism of the select/shift device and a sensor.

  According to the present invention, by providing the oil guide path for guiding the detent mechanism and the sensor on the upper surface in the control box, it is possible to reliably supply oil to the detent mechanism and the sensor.

It is sectional drawing which shows one embodiment of this invention. It is the sectional view on the AA line of FIG. It is a bottom view of FIG. It is sectional drawing which shows other embodiment of this invention. It is the BB sectional view taken on the line of FIG.

  Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

  1 to 3, 10 is a control box provided on the transmission case 12 of the transmission 11, and a select/shift device 13 is provided in the control box 10.

  In the select/shift device 13, a shaft 14 for performing select and shift operations is provided on the control box 10 so as to be rotatable and axially movable, and a spline groove 15 of the shaft 14 is provided with a boss 16 for select/shift. An operating lever 17 for fitting and performing a select operation and a shift operation is integrally provided on the boss 16, and a tip end 18a of a select lever 18 provided on the control box 10 is fitted in a groove 19 of the boss 16.

  Although not shown in the figure, the shaft 14 is attached to the control box 10 in a direction orthogonal to the main shaft of the transmission 11, and is urged by the left and right springs 20 and 20 in the control box 10. Hold in neutral position.

  In the gear shift select operation, the boss 16 moves left and right by the rotation of the select lever 18, whereby the tip of the operation lever 17 shifts the shift fork of the gear shift stage (not shown). The shift stage is selected by moving to and shifting to the shift block.

  The shift operation of the selected gear is performed by rotating the shaft 14 in a direction shown by an arrow in the figure by a predetermined angle to rotate the boss 16 and to rotate the tip of the operating lever 17 to shift gears (not shown). The sleeve is shifted in the axial direction of the main shaft via the fork and brought into contact with the gear.

  Further, by rotating the shaft 14 in the opposite direction, the gear 14 is disconnected from the gear position to be in the neutral position, and when the shaft 14 is further rotated in the opposite direction by a predetermined angle, the sleeve comes into contact with the other gear position.

  An end 14e of the shaft 14 opposite to the rotational drive side is supported by a shaft hole 10e formed in the control box 10, and a cap 21 for detecting a detent and a rotational position straddling the end 14e and the spline groove 15. Are fitted. A detent groove projection 22 and an angle detection projection 23 are provided on the outer circumference of the cap 21.

  A detent groove 22d is formed on the outer periphery of the detent groove projection 22 to determine a shift position that comes into contact with a gear when shifting. The control box 10 is provided with a ball click 24 in the detent groove 22d and a detent mechanism 25. Composed. The shift position of the detent mechanism 25 is determined by fitting the ball click 24 into the detent groove 22d.

  1 and 3, the operation lever 17 is selectively moved to the right side (for example, the select position of 1st and Rev), the operation lever 17 is rotated from the neutral position to the shift position, and is moved to the detent groove 22d of the detent mechanism 25. The state where the ball click 24 is engaged and positioned is shown.

  The rotational position of the angle detecting projection 23 is detected by the sensor 26 provided in the control box 10.

  The select/shift operation by the select/shift device 13 is performed by an operation lever 17 provided integrally with the boss 16, and a lever guide 27 for guiding the operation lever 17 in the select direction and the shift direction is provided in the mission case. 12 is provided slidably in a select guide groove 29 provided in 12, and the operating lever 17 is provided so as to pass through a shift guide groove 28 formed in a lever guide 27.

  The lever guide 27 moves in the left-right direction together with the operation lever 17 when the operation lever 17 is selected, and when the operation lever 17 shifts, the lever guide 27 stops at the select stop position, and the operation lever 17 shifts to the shift guide groove 28. Shifting is performed by rotating between.

  Next, the oil supply mechanism in the present embodiment will be described.

  As described above, the oil is supplied into the control box 10 by scraping the oil by the gears provided on the counter shaft of the transmission 11, but in the illustrated select/shift device 13, the operating lever 17 is used. Since the lever guide 27 for guiding the oil is provided so as to partially cover the opening on the lower surface of the control box 10, the scraped oil is supplied to the detent mechanism 25 and the sensor 26 near the right side wall of the control box 10. The amount of oil consumed is very small.

  Here, as shown in FIG. 1, the lever guide 27 moves left and right while being guided by the select guide groove 29 of the mission case 12, but the lever guide 27 covers the opening on the lower surface of the control box 10. When in an arbitrary select position, an opening 30 connected to the mission case 12 is surely formed on either the left or the right.

  Therefore, the upper surface 10u in the control box 10 is provided with an oil guide path 32 that receives the oil scraped up from the transmission 11 side and guides the oil to the detent mechanism 25 and the sensor 26.

  As shown in FIG. 2, the oil guide path 32 is integrally formed on the upper surface 10u of the control box 10 and includes a pair of protrusions 31, 31 discharged downward. As shown in FIG. 1, the projection 31 is formed such that the lower end of the projection 31 gradually inclines downward toward the detent mechanism 25 so that the detent mechanism 25 is supplied with oil by flowing oil from the left end to the right end of the upper surface 10u. To be done. In this case, the upper surface 10u of the control box 10 is formed such that its thickness is thin on the left side and thick on the right side detent mechanism 25 side, so that the protrusion length from the upper surface 10u can be reduced even if the projection 31 is tilted downward. Even if the thickness is substantially constant, it can be inclined downward, and the oil induced by the wettability can be prevented from diffusing on the detent mechanism 25 side.

  The detent-side end 31e of the protrusion 31 is provided so as to be released from the side wall of the control box 10, so that the oil drip space 33 is formed therebetween.

  The breather is provided on the control box 10 on the side where the shaft 14 is rotated, but it may be provided on the upper surface 10u between the projections 31.

  Next, the operation of this embodiment will be described.

  First, as shown in FIG. 1, when the select position of the shaft 14 is on the right side and the opening 30 of the control box 10 is on the left side, part of the oil scraped up in the transmission case 12 is the opening. 2, the oil flows along the side surface in the control box 10 as shown by the dotted arrow in FIG. 2, and the oil is received by the protrusion 31.

  The oil adhering to the protrusion 31 travels on the surface of the protrusion 31 due to its adhesiveness, and while flowing to the right along the inclination of the protrusion 31, a part of the oil drops from the protrusion 31 and falls into the spline groove 15 of the shaft 14. As lubricating oil between the boss 16 and the boss 16, and the rest drops from the dripping space 33 near the detent mechanism 25 and the sensor 26 to lubricate them.

  The protrusion 31 can reliably supply oil to the detent mechanism 25 and the sensor 26 only by changing the shape of the upper surface 10u of the control box 10.

  4 and 5 show another embodiment of the present invention.

  In FIGS. 1 and 2, an example in which the protrusion 31 is provided on the upper surface 10u in the control box 10 to form the oil guide path 32 has been described, but in the present embodiment, the oil guide path 32 has a gutter shape. The oil guide plate 34 is used.

  The oil guide plate 34 is made of a metal plate or a resin plate and has a hat-shaped cross section. The oil guide plate 34 has a plate-shaped mounting portion extending from the left end to the right end so as to be joined to the upper surface 10u in the control box 10 at the center. 34u and a trough portion 34j formed in a J-shaped cross section on both sides of the mounting portion 34u. The length of the trough portion 34j is formed so as to flow toward the detent mechanism 25 side, and the oil guide plate 34 is formed. It is formed to gradually incline downward.

  To mount the oil guide plate 34, a nut 36 having a support washer 35 having a diameter slightly smaller than the width of the mounting portion 34u is applied to the mounting portion 34u, and a bolt 37 is screwed into the nut 36 from the upper surface 10u of the control box 10. ..

  At the end of the oil guide plate 34 on the detent mechanism 25 side, a length is formed so as to separate from the side wall of the control box 10, and a drip space 33 is formed therebetween.

  In the present embodiment, a part of the oil scraped up in the mission case 12 passes through the opening 30 and flows along the side surface inside the control box 10 as indicated by a dotted arrow in FIG. Is received by the gutter 34j of the oil guide plate 34, oil flows through the gutter 34j, and the oil is supplied from the drip space 33 to the detent mechanism 25 and the sensor 26.

  Further, the spline groove 15 of the shaft 14 is supplied with oil overflowing from the gutter portion 34j, but an oil supply hole may be appropriately formed in the gutter portion 34j to supply oil.

  As described above, in the present embodiment, by providing the oil guide path 32 on the upper surface 10u of the control box 10, it is possible to reliably supply oil to the detent mechanism 25 and the sensor 26, and the detent mechanism 25 rusts and malfunctions. Can be prevented.

  It should be noted that the present invention is not limited to the above-described embodiment, and modifications can be made without departing from the scope of the present invention. For example, the shaft 14 is arranged so as to be orthogonal to the main shaft of the transmission 11. However, the example of the select/shift device 13 that performs the select operation by moving the shaft 14 in the left-right direction and the shift operation in the rotational direction of the shaft has been described, but the shaft 14 is arranged in parallel with the main shaft of the transmission 11. It may be configured such that the selection operation is performed by rotating 14 and the shift operation is performed by moving the shaft in the left-right direction, and the shape of the oil guide path 32 for supplying oil to the detent mechanism is appropriately changed accordingly.

10 Control Box 11 Transmission 12 Mission Case 13 Select/Shift Device 14 Shaft 25 Detent Mechanism 26 Sensor 32 Oil Guideway

Claims (2)

A control box that is provided on the upper part of the transmission transmission case and that houses the select/shift device that controls the transmission, and an upper surface inside the control box that receives the oil scraped up from the transmission side, The oil is provided with an oil guide path for guiding the oil to the detent mechanism or sensor of the select/shift device ,
The oil guide path is composed of an oil guide plate having a hat-shaped cross section provided on the upper surface in the control box, and the gutter portion of the oil guide plate extends in the shaft direction of the select/shift device and faces the detent mechanism side. An oil supply mechanism characterized by being formed so as to gradually incline downward . The oil supply mechanism according to claim 1 , wherein a drip space for supplying oil to the detent mechanism is formed between a trough portion of the oil guide plate on the detent mechanism side and a side wall of the control box.

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