JPH11247974A - Lubricating structure of transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate lubrication failure of a sliding part by arranging a guide collar projecting in the central direction of an output shaft to guide a lubricating oil flowed in the space part to the sliding part of a synchronizer ring and the synchronous taper part. SOLUTION: A synchronous mechanism 46 is arranged in the vicinity of a transfer drive sprocket 38, and has a synchronizer ring 50 meshing with a synchronous hub 48 on the outer periphery of a first output shaft 10 and the synchronous taper part 52 to slide this. The connecting hole part 58 to the space part 56 is arranged in the synchronous taper part 52, and the guide collar part 60 projecting in the central direction of the first output shaft 10 is arranged in the end part of the synchronizer ring 50. Lubricating oil flowed in the space part 56 reaches the sliding part of the synchronizer ring 50 and the synchronous taper part 52 by the action of centrifugal force. Therefore, the lubricating oil can be forcedly guided to the sliding part to eliminate lubrication failure.

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 transmission, and more particularly, to changing the shape of a synchronizing means to guide lubricating oil to a sliding portion between a synchronizer ring and a synchro taper portion to eliminate poor lubrication. The present invention relates to a lubrication structure of a transmission to be obtained.

[0002]

2. Description of the Related Art An automobile is provided with a transmission as a power transmission mechanism for converting a driving force from a mounted internal combustion engine into a desired state in accordance with running conditions and taking out the desired state. The transmission includes a manual type and an automatic type.

[0003] Transmissions, for example, manual transmissions, have an input gear train and a first gear train.
It consists of a plurality of speed change gear trains such as a speed gear train and a reverse gear train,
By engaging a desired transmission gear train, the driving force of the internal combustion engine input through the input shaft is shifted to a predetermined state. Then, the wheels are driven via the output shaft by the shifted driving force.

In a transmission, 2
Some include a synchronization means for switching between a wheel drive state and a four-wheel drive state.

[0005] As a lubrication structure for the transmission, there is one disclosed in Japanese Utility Model Publication No. 5-58966. The synchronizer disclosed in this publication increases the cone angle of the conical inner peripheral surface of the synchronizer ring that can engage with the cone surface provided on the speed gear by a small angle from the cone angle of the cone surface, and between the two surfaces. A gap that increases toward the large diameter side of the cone surface is formed to promote the flow of the lubricating oil.

[0006] There is also one disclosed in Japanese Utility Model Publication No. 5-58966. The synchronizer disclosed in this publication includes a speed gear integrally provided with a clutch gear,
An oil hole for supplying lubricating oil toward a cone surface that can be engaged with the conical inner peripheral surface of the synchronizer ring is formed so as to have a rake angle in the opening direction of the speed gear so as to penetrate in the axial direction, The centrifugal action accompanying the opening of the speed gear actively supplies lubricating oil to the cone surface.

[0007]

As shown in FIG. 5, a synchronizing mechanism 146, which is a synchronizing means in a conventional transmission, is disposed near the transfer drive sprocket 138 and is disposed on the outer periphery of the first output shaft 110. Synchronizer hub 148 and a synchronizer ring 150 meshed with the synchro hub 148.
, A synchro taper portion 152 for sliding the synchronizer ring 150, and a sleeve 154.

However, the synchronizer ring 150
The structure does not have a structure for lubricating a sliding portion between the motor and the synchro taper portion 152.

That is, even if the lubricating oil scooped up by gears or the like flows into the inner space 156 from the communication hole 158 of the synchro taper portion 152, the sliding portion between the synchronizer ring 150 and the synchro taper portion 152 5 does not pass through the narrow sliding portion, but passes through the outside of the synchronizer ring 150 as shown by the arrow in FIG. 5, and lubricates the sliding portion between the synchronizer ring 150 and the synchro taper portion 152. There is no thing.

As a result, there are the following inconveniences due to poor lubrication of the sliding portion between the synchronizer ring 150 and the synchro taper portion 152. (1) The sliding resistance of the synchronization mechanism increases. (2) Abnormal heat generation occurs. (3) Abnormal wear occurs. (4) The shift cannot be performed by the synchronizer stick, and the feeling deteriorates.

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention slides a synchronizer hub provided on the outer periphery of an output shaft, a synchronizer ring meshing with the synchronizer hub, and a synchronizer ring. A synchro unit having a synchro taper portion is provided,
In the transmission that switches between the two-wheel drive state and the four-wheel drive state by the synchronization means, a space surrounded by the synchronization hub, the synchronizer ring, and the synchronization taper portion is provided, and the space from the outside to the inside of the synchronization taper portion is provided. Provide a communication hole to communicate with the part, at the end of the synchronizer ring on the space side,
In order to guide the lubricating oil that has flowed into the space to the sliding portion between the synchronizer ring and the synchro taper portion, a guide flange that projects in the center direction of the output shaft is provided.

A synchronizing means having a synchronizing hub arranged on the outer periphery of the output shaft, a synchronizing ring meshing with the synchronizing hub, and a synchronizing taper portion for sliding the synchronizing ring is provided. In a transmission for switching between a drive state and a four-wheel drive state, a space surrounded by the synchro hub, the synchronizer ring, and the synchro taper portion is provided, and a communication hole communicating from the outside to the inside of the synchro taper portion with the space portion. A protrusion protruding toward the center of the output shaft is provided at an end of the synchro taper portion on the space side, and a synchro taper portion before the protrusion is provided with lubrication flowing into the space. Oil is guided to the sliding part between the synchronizer ring and the synchro taper. Rubeku, characterized in that a lubricating oil guide hole communicating with said space and the sliding parts.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION
The lubricating oil scooped up by the gears of the transmission reaches the communication hole outside the synchro taper part, passes through this communication hole and flows into the space inside, and the lubricating oil is guided by the guide flange to the synchronizer. It is forcibly guided to the sliding portion between the ring and the synchro taper portion to eliminate poor lubrication.

Further, when the lubricating oil scooped up by the gear group of the transmission reaches the communication hole outside the synchro taper portion and flows through the communication hole into the inside space, the lubricating oil is formed by the projection. The lubricating oil is moved to the lubricating oil guide hole side, and the lubricating oil is guided to the sliding portion between the synchronizer ring and the synchro taper portion by the lubricating oil guide hole, thereby eliminating poor lubrication.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

1 to 3 show a first embodiment of the present invention. In FIG. 3, reference numeral 2 denotes a manual transmission, 4 denotes an input shaft, and 6 denotes a counter shaft.

As shown in FIG. 3, the transmission 2 includes an input shaft 4, a counter shaft 6 as a driving side shaft, a first output shaft 10 as a driven side shaft, and a reverse idler shaft 12 inside a transmission case 8. And are pivoted.

The input shaft 4 and the first output shaft 10 are connected so as to have the same center of rotation, and the counter shaft 6 is disposed in parallel with the input shaft 4 and the first output shaft 10. . A plurality of speed change gear trains 14 are provided between the respective shafts 6, 10, and 12. The plurality of speed change gear trains 14 include an input gear train 16, a first gear train 18 to a fifth gear train 24, and a reverse gear train 26.

A first-speed / second-speed switching mechanism 28 is provided between the first-speed gear train 18 and the second-speed gear train 20.
A third-speed / fourth-speed switching mechanism 32 is provided between the second gear 2 and the shaft end 30 of the input shaft 4, and a fifth-speed gear train 24 and a reverse gear train 2 are provided.
6, a 5-speed / reverse switching mechanism 34 is provided.

The first speed / second speed switching mechanism 28 selectively switches the meshing state between the first speed gear train 18 and the second speed gear train 20. The third-speed / fourth-speed switching mechanism 32 selectively switches the meshing state of the third-speed gear train 22 and the coupling state of the input shaft 4 and the first output shaft 10. The fifth speed / reverse switching mechanism 34 selectively switches the meshing state between the fifth speed gear train 24 and the reverse gear train 26.

Further, a second output shaft 36 is provided in parallel with the first output shaft 10.

A transfer drive sprocket 38 is supported on the first output shaft 10 by a bearing 40, and a transfer driven sprocket 42 is fixedly provided on the second output shaft 36. A transfer chain 44 is wound around the transfer driven sprocket 42.

In the transmission 2, a transfer drive sprocket 38 is connected to the first output shaft 10.
A synchro mechanism 46 is provided as a synchronizing means for switching between the two-wheel drive state and the four-wheel drive state by being separated.

The synchronizing mechanism 46 is disposed near the transfer drive sprocket 38 and, as shown in FIG. 1, a synchronizing hub 48 disposed on the outer periphery of the first output shaft 10 and a synchronizer meshing with the synchronizing hub 48. It has a ring 50, a synchro taper portion 52 for sliding the synchronizer ring 50, and a sleeve 54.

At this time, a space 56 surrounded by the synchro hub 48, the synchronizer ring 50, and the synchro taper portion 52 is provided, and a communication hole communicating from the outside of the synchro taper portion 52 to the inside space 56 is provided. A portion 58 is provided at an end of the synchronizer ring 50 on the space portion 56 side to guide the lubricating oil flowing into the space portion 56 to a sliding portion between the synchronizer ring 50 and the synchro taper portion 52. A guide brim portion 60 protruding toward the center of one output shaft 10 is provided.

More specifically, a communication hole 58 is provided in the synchro taper portion 52, and as shown by the arrow A in FIG. Then, lubricating oil is supplied into the space 56.

A guide flange 60 is provided at the end of the synchronizer ring 50 on the space 56 side. The guide flange 60 allows the space 56 as shown by the arrow B in FIG. 1 and the arrow B in FIG. The lubricating oil that has flowed into the inside is slid between the synchronizer ring 50 and the synchro taper 52.
Is to be guided.

The lubricating oil that has passed through the sliding portion S between the synchronizer ring 50 and the synchro taper portion 52 flows out of the synchro taper portion 52 as shown by arrows C in FIG. 1 and FIG. I do.

Next, the operation will be described.

When a driving force from an engine (not shown) is input to the input shaft 4 of the transmission 2, the counter shaft 6 and the first output shaft 10 rotate, and a gear group mounted on the counter shaft 6 supplies lubricating oil. Scrape up.

When the lubricating oil reaches the communication hole 58 outside the synchro taper portion 52, it passes through the communication hole 58 and, as shown by the arrow A in FIG. Flows into.

At this time, the lubricating oil flowing into the space 56 is guided by the guide flange 60 by the action of the centrifugal force as shown by the arrow B in FIG. 1 and the arrow B in FIG. After reaching the sliding portion S with the tapered portion 52, lubricating while passing through the sliding portion S, after passing through the sliding portion S, the arrow C in FIG. 1 and the arrow C in FIG.
As shown in the figure, it flows out of the synchro taper portion 52.

When switching between the two-wheel drive state and the four-wheel drive state by the synchro mechanism 46 of the transmission 2, the sleeve 54 is slid and engaged with and disengaged from the synchro taper portion 52.

Thus, the synchronizer ring 5
The lubricating oil flowing into the space 56 can be forcibly guided to the sliding portion S between the synchronizer ring 50 and the synchro taper 52 by the guide flange 60 provided at the end of the space 56 on the side of the space 56. In addition, poor lubrication can be eliminated, which is practically advantageous.

Further, since the configuration can be dealt with only by a simple change of the shape of the synchronizer ring 50, there is no fear that the configuration is unnecessarily complicated, the manufacture is easy, and the cost can be maintained at low cost. It is economically advantageous.

FIG. 4 shows a second embodiment of the present invention. In the second embodiment, portions that perform the same functions as those in the first embodiment will be described with the same reference numerals.

The second embodiment is characterized in that a protrusion 72 is provided at the end of the synchro taper portion 52 on the space 56 side to protrude toward the center of the first output shaft 10. The point is that a lubricating oil guide hole 74 that connects the sliding portion and the space 56 is provided in the synchro taper portion 52 before the portion 72.

That is, as shown in FIG. 3, there is provided a communication hole 58 communicating from the outside of the synchro taper portion 52 to the space 56 inside. The first output shaft 10 is attached to an end of the synchro taper portion 52 on the space 56 side.
Are provided in the center direction.

The synchro taper portion 52 located before the projecting portion 72 is provided with a lubricating oil guide hole 74 extending in the radial direction, and the lubricating oil guide hole 74 allows the synchronizer ring 50 to be synchronized with the synchro taper portion. The sliding portion with the space 52 is communicated with the space 56 to guide the lubricating oil flowing into the space 56 to the sliding portion.

When the lubricating oil flows into the space 56 through the communication hole 58 as shown by the arrow A in FIG. The lubricating oil is guided to the sliding portion between the synchronizer ring 50 and the synchro taper portion 52 by the lubricating oil guide hole 74 (see the arrow C in FIG. 4). As in the case of the first embodiment described above, poor lubrication can be eliminated, which is practically advantageous.

Further, since the configuration can be dealt with only by the simple change of the shape of the synchro taper portion 52, there is no fear that the configuration is unnecessarily complicated as in the case of the first embodiment, and the manufacture is easy. And can keep costs low,
It is economically advantageous.

The present invention is not limited to the above-described first and second embodiments, but can be variously modified.

For example, in the first embodiment of the present invention, the shape of the synchronizer ring is changed, and in the second embodiment, the shape of the synchronizer taper is changed. However, both the synchronizer ring and the synchronizer taper are changed. It is also possible to increase the amount of lubricating oil guided to the sliding portion between the synchronizer ring and the synchro taper portion by changing the shape of

[0044]

As described above in detail, according to the present invention, there is provided a synchro hub provided on the outer periphery of an output shaft, a synchronizer ring meshing with the synchro hub, and a synchro taper portion for sliding the synchronizer ring. And a space portion surrounded by a synchro hub, a synchronizer ring, and a synchro taper portion. In the transmission for switching between the two-wheel drive state and the four-wheel drive state by the synchro means, A communication hole communicating with the space is provided, and the end of the synchronizer ring on the space side is provided with an output shaft for guiding the lubricating oil flowing into the space to the sliding portion between the synchronizer ring and the synchro taper. A guide flange that protrudes in the center direction is provided. The lubricating oil that has flowed into The inter the sliding portion between the synchronizer ring and the synchro tapered portion can be forcibly guided, and give to eliminate poor lubrication, it is practically advantageous. In addition, since it is possible to deal with only the easy change of the shape of the synchronizer ring, there is no fear that the configuration is unnecessarily complicated, the production is easy, the cost can be maintained at a low cost, and economically. It is advantageous.

A synchronizing hub disposed on the outer periphery of the output shaft, a synchronizer ring meshing with the synchronizing hub,
A transmission is provided which has a synchro means having a synchro taper portion for sliding a synchronizer ring, and is surrounded by a synchro hub, a synchronizer ring and a synchro taper portion in a transmission for switching between a two-wheel drive state and a four-wheel drive state by the synchro means. A space portion is provided, a communication hole communicating from the outside to the inside space portion of the synchro taper portion is provided. In the synchro taper part before the part,
In order to guide the lubricating oil flowing into the space to the sliding part between the synchronizer ring and the synchro taper part, a lubricating oil guide hole that connects the sliding part and the space is provided.
The lubricating oil in the space is moved to the lubricating oil guide hole side by the protruding portion, and the lubricating oil can be guided to a sliding portion between the synchronizer ring and the synchro taper portion by the lubricating oil guide hole portion. Is practically advantageous. In addition, since the configuration can be dealt with only by the simple change of the shape of the synchro taper portion, there is no fear that the configuration is unnecessarily complicated. Is also advantageous.

[Brief description of the drawings]

FIG. 1 is a schematic enlarged sectional view of a synchro mechanism portion of a transmission showing a first embodiment of the present invention.

FIG. 2 is a schematic enlarged view of an arrow 〓〓 part of FIG. 2;

FIG. 3 is a schematic sectional view of a transmission.

FIG. 4 is a schematic enlarged sectional view of a synchro mechanism portion of a transmission showing a second embodiment of the present invention.

FIG. 5 is a schematic enlarged sectional view of a synchro mechanism portion of a transmission showing the prior art of the present invention.

[Explanation of symbols]

 2 Transmission 4 Input shaft 6 Counter shaft 10 First output shaft 12 Reversing idler shaft 14 Transmission gear train 36 Second output shaft 38 Transfer drive sprocket 42 Transfer driven sprocket 44 Transfer chain 46 Synchro mechanism 48 Synchro hub 50 Synchronizer ring 52 Synchro taper Part 54 sleeve 56 space part 58 communication hole part 60 guide flange part S sliding part

Claims (2)

[Claims] 1. A synchro hub arranged on an outer periphery of an output shaft,
A synchronizer ring that meshes with this synchro hub,
In a transmission for switching between a two-wheel drive state and a four-wheel drive state by providing a synchro means having a synchro taper portion for sliding the synchronizer ring, the synchro hub is surrounded by the synchronizer ring and the synchro taper portion. And a communication hole portion communicating from the outside to the inside of the synchro taper portion with the space portion. An end of the synchronizer ring on the space side is provided with a synchronizer for lubricating oil flowing into the space portion. A lubrication structure for a transmission, comprising: a guide flange projecting toward a center of the output shaft so as to guide a sliding portion between a ring and a synchro taper portion. 2. A synchro hub arranged around the output shaft,
A synchronizer ring that meshes with this synchro hub,
In a transmission for switching between a two-wheel drive state and a four-wheel drive state by providing a synchro means having a synchro taper portion for sliding the synchronizer ring, the synchro hub is surrounded by the synchronizer ring and the synchro taper portion. And a communication hole portion communicating from the outside to the inside of the synchro taper portion with the space portion, and a protrusion protruding toward the center of the output shaft at an end of the synchro taper portion on the space portion side. The sliding portion and the space portion are provided in the synchro taper portion before the projecting portion to guide the lubricating oil flowing into the space portion to the sliding portion between the synchronizer ring and the synchro taper portion. The transmission has a lubricating oil guide hole Smooth structure.