JP2763986B2 - Synchromesh clutch lubrication system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lubricating structure for a synchromesh clutch device used for a tractor transmission, for example.

[0002]

2. Description of the Related Art For example, a double-cone synchromesh type clutch device or the like is used for a forward / reverse transmission, a main transmission and the like of a transmission. In this clutch device, a shifter is mounted on a coupling fitted to a rotating shaft. The shifter is pushed in the axial direction to synchronously rotate the rotary transmission through synchronization members such as an outer cone, a center cone, and an inner cone, and is further meshed with the rotary transmission by pushing the shifter further. Is configured.

[0003]

SUMMARY OF THE INVENTION The clutch device comprises:
Although lubrication is performed by immersion in oil in the transmission case, continuous high-speed rotation may cause the synchro member to run out of oil, resulting in severe wear or seizure. Also, when the shifter is rotated (pushed) to one side in order to rotate and mesh with the one rotating transmission body, too much oil flows to the other synchro member,
One of the sync members could run out of oil.

According to the present invention, oil is supplied from the inside of a rotary shaft to a first / second synchro member via an oil passage formed in a coupling to lubricate the synchro member from its inner peripheral surface.
By shifting the phase of the oil passage in the circumferential direction, the lubricating oil spreads over the whole rather than one side,
It is an object of the present invention to solve the problems of the related art.

[0005]

According to the present invention, a shifter 17 is meshed with a coupling 16 fitted on a rotating shaft 9, and
1st and 2nd provided with the front and back of the shifter 17 by pushing the 17 in the axial direction
First and second rotary transmissions before and after via synchronization members 41 and 42
A synchromesh type clutch lubricating device that rotates the first and second rotary transmissions 8 and 10 by synchronously rotating the first and second rotary transmissions 8 and 10 and further pressing the shifter 17 to achieve the above object. The following technical measures have been taken:

That is, in the present invention according to claim 1, the coupling 16 includes a plurality of second oil passages 36 penetrating both end surfaces in the axial direction, and the rotating shaft 9 includes a lubricating oil in the second oil passage 36. and a first oil passage 30 and the radial direction of the communication oil passage 38 communicating with this axial communicating with the oil supply source to supply, the second oil
The first and second communication members communicating with the road 36 and the first and second synchronization members 41 and 42
(2) The radial grooves 39 and 40 are connected to the coupling 16 and the
A plurality is provided between each of the one and two rotation transmission bodies 8 and 10,
The first and second radial grooves 39 and 40 are connected to the oil passage 38 in the circumferential direction.
In which the phase is shifted .

Further, according to the present invention, the first and second synchro members 41 and 42 are connected to the second oil passages 36 formed in the coupling 16, respectively.
Two radial grooves 39, 40 are provided at both axial end surfaces of the coupling 16, and further, the oil communication hole 44 formed in the ball holding ring 43 of the shifter 17 and the first and second radial grooves 39 , 40 are formed. The phase is shifted in the direction.

[0008]

[Operation] For example, in FIG.
When the shifter 17 is moved in the R direction, the second gear 10 as the second rotation transmission member starts to rotate synchronously via the second synchronization member 42 such as the outer cone 28, the center cone 25, and the inner cone 22. When the shifter 17 is moved, the shifter 17 meshes with the first spline of the second gear 10 while meshing with the coupling 16, and connects the coupling 16 with the second gear 10.

While the rotating shaft 9 is rotating, oil from the first oil passage 30 communicated with the oil supply source is forcibly forced to the second oil passage 36 formed in the coupling 16 via the communication oil passage 38. Was introduced to
The first and second synchro members 41 and 42 are lubricated from the inner periphery. At this time, since the communication oil passage 38 as shown in FIG. 1 (B) is phase shifted in the circumferential direction with respect to the second oil passage 36 is not immediately introduced into the radial direction from the communication oil passage 38, the rotary shaft 9 circumferential direction
The first and second radial grooves 39, 40 and the
It reaches 2 oil passages 36, and both of the first and second synchro members 41 and 42
And it spreads all over the circumference .

[0010]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 3, reference numeral 1 denotes a transmission case of a tractor transmission, which is a main transmission 2, a forward / reverse transmission 3, an auxiliary transmission 4, and a power transmitted from an engine via a dry main clutch or a hydraulic clutch of a transmission.
And a PTO transmission 5 and the like, and the subtransmission 4 is connected to the differential via a differential drive shaft 6.

In the forward / reverse transmission 3, as shown in FIG. 2, a first gear 8 as a first rotary transmission is spline-fitted to a rear portion of a transmission shaft 7 which is an output shaft of the main transmission 2. On the other hand, a rotating shaft 9 is arranged concentrically, a second gear 10 as a second rotating transmission body is loosely fitted to the rotating shaft 9, and a gear body 12 is loosely fitted to a PTO transmission shaft 11 above them. 1st gear
8 meshes with the first gear portion 13 of the gear body 12, the second gear 10 meshes with the second gear portion 14 of the gear body 12 via the back gear 15, and the first and second gears 8, 10 ( A double-cone synchromesh type clutch device is disposed between the rotary transmissions.

As shown in FIGS. 1A and 1B, the clutch device includes a coupling 16 spline-fitted to the rotating shaft 9, and a coupling spline is formed on the outer periphery of the coupling 16. Each of the first and second gears 8 and 10 has a first spline and a second spline having the same shape as the coupling spline. However, the first and second splines of the first gear 8 are formed on the transmission shaft 7 side.

The shifter 17 is attached to the outer spline of the coupling 16.
The shifter 17 has a hollow portion between the inner and outer circumferences, and has a shift fork engaging portion 18 shown in FIG. 1 (A) on the outer circumference.
(A) is slid in the axial direction of arrows F and R. This shifter 17
Is selectively connected to the first spline on the left and right by sliding in the axial direction, and is connected to the first spline of the first rotary transmission body 8 so that the transmission shaft is connected via the coupling 16.
7 and the rotating shaft 9 are directly connected to each other to transmit forward power.
On the other hand, by connecting the shifter 17 to the first spline of the second rotary transmission, the second gear 10 is connected to the rotary shaft 9,
The reverse power is transmitted from the first gear 8 via the gear body 12 and the back gear 15.

First and second rotary transmissions (first and second gears) 8,10
Retainers 19, 20 are spline-fitted to the respective second splines, and the retainers 19, 20 are formed with a plurality of claws protruding inward of the shaft (toward the shifter 17) on the outer periphery. The shaft outer sides of the inner cones 21 and 22 are fitted to the inner peripheral sides of the inner cones 21 and 22, respectively. The inner cones 21 and 22 have a cone surface whose outer peripheral surface is tapered in the axial direction.
The synchronizer pin 23 has a concave portion with which the end portion engages. The center cones 24 and 25 having a cone surface parallel to the cone surfaces of the inner cones 21 and 22 on the inner and outer circumferences are inner cones 2 and
1 and 22, and engagement recesses formed on the outer surface of the shaft engage with the claws of the retainers 19 and 20.

In addition to the first synchronizer pin 23, the shifter 17 is provided with a second synchronizer pin 26 for regulating the axial movement of each of the center cones 24, 25. The first,
The second synchronizer pins 23 and 26 are arranged out of phase in the circumferential direction, each has a spherical end at each end, and comes into contact with the inner cones 21 and 22 and the center cones 24 and 25 at a point or a small surface close thereto. The lubricating oil easily enters between the inner cones 21 and 22 and the inner surfaces of the center cones 24 and 25.

Outer cones 27, 28 are fitted over the outer peripheral surfaces of the front and rear center cones 24, 25, and the inner peripheral surfaces of the cones 27, 28 are parallel to the cone surfaces of the center cones 24, 25. It has a cone surface, and each has a plurality of arms projecting in the opposite direction in the circumferential direction. Each arm is a shifter 17
And has a hollow on the inner peripheral surface side, and a ball 29 which is repelled by a spring is engaged.

That is, the shifter 17 fits the inner ring and the outer ring.
And the shift fork engaging portion 1
8 and a ball 29 and the ball
The spring that urges the
You. The outer ring is positioned at the position corresponding to the ball 29 on the outer race.
27, 28 has a hollow portion into which the arm is inserted,
Outer cones 27 and 28 are ring-shaped parts that form the cone surface
A plurality of arms protruding in the axial direction are formed in the circumferential direction,
Arms of both outer cones 27, 28 are inserted into the hollow part of the outer ring
The shifter
It can be moved in the axial direction together with 17. For example, Schiff
When the heater 17 is moved in the F direction, the first outer cone 27
Press the cone surface against the first center cone 24,
Horn 24 against the first inner cone 21, thereby
The outer cone 27 and the retainer 19 rotate synchronously.
When the movement of the first outer cone 27 stops,
The resistance between the ball 29 and the first outer cone 27 is
Only the lid 17 moves in the axial direction to form the spline of the transmission shaft 7
Mesh.

The rotary shaft 9 has an axial first oil passage 30 formed therein. The first oil passage 30 is provided in the PTO shown in FIG.
The valve of the hydraulic clutch 31 is connected by a communication passage 32 shown in FIG. 1A, and the valve is used as an oil supply source. As an oil supply source, a distance collar 33 fitted on the rotating shaft 9 as shown in FIG. 2 may be provided with a gear lubrication oil scooping member 34.

That is, the scooping member 34 has a box shape whose leading side in the rotational direction is open, scoops oil in the transmission case 1 by rotation of the rotating shaft 9, and forcibly supplies the oil to the first oil passage 30 through the passage 35. Solution. The coupling 16, the second oil passage 36 with a circumferential spacing which penetrates the axial end surfaces Yes forms plural form <br/>, the oil inlet portion of the second oil passage 36 Abura貯37 is formed in the circumferential direction.

The oil reservoir 37 of the first oil passage 30 and the second oil passage 36 has a communication oil passage 38 communicating the two oil passages 37 with the first oil passage 30 in a radial direction. The passage 36 and the connecting oil passage 38 are shifted in phase in the circumferential direction as shown in FIG. That is, when the coupling 16 is spline-fitted to the rotating shaft 9, the second oil passage 36 and the connecting oil passage 38 are spline-fitted so as to be out of phase in the circumferential direction.

The first and second end faces of the coupling 16 in the axial direction are
Two radial grooves 39 and 40 are formed, and the first radial groove 39
Is inner cone 21, center cone 24, outer cone 27
The first radial member 40 is formed of an inner cone 22, a center cone 24, an outer cone 28, and the like. It can be supplied from any direction.

In this case, the first and second radial grooves 39, 40 are
The second oil passage 36 has the same circumferential phase as the second oil passage 36 and the second radial direction.
Groove 40 is in communication with both Abura貯Ri 37, also by being displaced circumferentially phase with the communication oil passage 38, discharge oil from the oil passage 38 is not immediately supplied to the second synchronizer member 42, rotation Axis 9
Flows in the circumferential direction along the outer circumference of the first radial direction, and sufficiently spreads to the second radial groove 40 via the second oil passages 36 in the front and rear directions of rotation, so that the first synchro member 41 is also sufficiently lubricated.

A ball holding ring (the inner ring of the shifter 17) 43 having the ball 29 is spline-fitted to the coupling 16, and a hole 44 for lubricating the spline fitting portion.
Are formed. Therefore, when the sliding shifter 17 in the F direction in this embodiment, the oil spreads from the first radial groove 39 through the second oil passage 36 to the first synchronizer member 41, the second synchronizer member through holes 44 42 Will escape to the side.

First and second synchro members formed on shifter 17
As shown in FIG. 1 (B), the communication passages (holes) 44 of
The phase is circumferentially shifted from the oil passage 36 and the first and second radial grooves 39 and 40. The first oil passage 30 formed in the rotating shaft 9 is plugged with a screw plug 45 at the shaft end.
The ball bearing 46 supporting the rotating shaft 9 is provided with a seal to prevent leakage of lubricating oil in the shifter 17.

[0025]

The present invention is as described above. The lubricating oil from the first oil passage formed on the rotary shaft is applied not only to one (second) synchro member but also to the other (first) synchro member. It can be supplied from a second oil passage formed in the coupling. In particular, mosquitoes
Communication between the first and second radial grooves on the coupling side and the rotating shaft side
The number of communication passages is out of phase with the road in the circumferential direction.
Even if the number of radial grooves is less than the number of radial grooves, all radial grooves
Can be supplied evenly, not only one of the front and back but also both synchro parts
Lubricating oil can be spread over the material and the strength of the rotating shaft
Can be maintained .

[Brief description of the drawings]

1A and 1B show an embodiment of the present invention, wherein FIG. 1A is a side sectional view of a main part, and FIG.

FIG. 2 is a sectional view in which the embodiment of the present invention is applied to a forward / reverse transmission.

FIG. 3 is an explanatory sectional view of the whole.

[Explanation of symbols]

 8 First rotating transmission body 9 Rotating shaft 10 Second rotating transmission body 16 Coupling 17 Shifter 30 First oil passage 36 Second oil passage 38 Communication passage 41 First synchro member 42 Second synchro member

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F16H 57/04 B60K 17/02 F16D 23/06

Claims (2)

(57) [Claims] A coupling (16) fitted on a rotating shaft (9).
The shifter (17) is meshed with the first and second synchro members (4) provided before and after the shifter (17) by pushing the shifter (17) in the axial direction.
The first and second rotary transmissions (8) and (10) are synchronously rotated through the first and second rotary transmissions (1) and (42), respectively, and the shifter (17) is further pushed to move the first and second rotary transmissions. (8), a plurality of a lubrication system for synchromesh clutches, before Symbol coupling (16) passing through the axial end surfaces for engagement (10)
A second oil passage (36), and the rotary shaft (9) is adapted to supply lubricating oil to the second oil passage (36).
Axial first oil passage (30) communicating with the supply source and communicating with it
Radial communication oil passage (38), the second oil passage (36) and the first and second synchronization members (41), (42).
The first and second radial grooves (39) and (40) communicating with
Between the coupling (16) and the first and second rotating transmission bodies (8) and (10).
The first and second radial grooves (39),
A lubricating device for a synchromesh clutch , wherein the phase of the (40) and the communication oil passage (38) are shifted from each other in the circumferential direction . 2. A coupling (16) fitted on a rotating shaft (9).
Mesh with the shifter (17), and push this shifter (17) in the axial direction.
The first and second synchro members (4) provided before and after the shifter (17)
The front and rear first and second rotary transmissions (8) and (10) are connected via 1) and (42).
Rotate them synchronously and push the shifter (17) further
The first and second rotary transmissions (8), (10)
A lubricating device for an enchrome mesh type clutch, wherein said rotating shaft (9) is a first axial oil passage communicating with an oil supply source.
(30), wherein the coupling (16) is a second oil penetrating both end faces in the axial direction.
A passage (36) for communicating the first and second oil passages (30) and (36) with each other.
Communication oil whose phase is shifted in the circumferential direction with respect to the second oil passage (36)
Includes road (38) to said rotary shaft (9), the first-2 synchro member have respectively passed through with the second oil passage formed (36) on said coupling (16) (41), in (42) First and second radial grooves (39), (40) communicating with each other are provided on both axial end surfaces of the coupling (16), and further, an oil communication hole formed in a ball holding ring (43) of the shifter (17). wherein the (44) first and second radiation groove (39), (40) and the lubricating device of the synchromesh clutch, characterized in that are out of phase <br/> in the circumferential direction.