JPH0554830U - Lubrication structure of synchromesh clutch device - Google Patents

Abstract

(57) [Summary] [Structure] The shifter 4 is meshed with the coupling 3 fitted to the rotary shaft 2, and the shifter 4 is pushed in the axial direction to synchronously rotate the rotary transmission body via the synchro member. Further shifter 4
Is pushed to engage with the rotary transmission body. An oil passage 5 to which oil is supplied is formed in the rotary shaft 2, and this oil passage 5
Is opened to the outer circumference of the rotary shaft 2 at the axial end face of the coupling 3 and communicates with the radial groove 6 on the coupling axial end face side. [Effect] Oil can be supplied to the synchromesh clutch device 1 from the inside for lubrication, wear of the synchromesh member can be reduced, and seizure can be prevented.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a lubrication structure for a synchromesh clutch device used in, for example, a tractor transmission.

[0002]

[Prior Art]

 For example, a double cone synchromesh clutch device is used for the forward / reverse transmission of the transmission, the main transmission, etc. This clutch device engages a shifter with a coupling fitted to the rotating shaft, It is configured to push the shaft in the axial direction to synchronously rotate the rotary transmission body through the synchro members such as the outer cone, the center cone and the inner cone, and further push the shifter to mesh with the rotary transmission body. There is.

[0003]

[Problems to be solved by the device]

 The clutch device is immersed in oil in the transmission case for lubrication, but if it is rotated at a high speed continuously, the sync member may run out of oil, resulting in severe wear and seizure. It may happen. The present invention can solve the above-mentioned problems of the prior art by supplying oil from the inside of the rotary shaft through the groove on the end face side of the coupling and lubricating the synchronizing member from the inner peripheral side thereof. An object of the present invention is to provide a lubrication structure for a synchromesh clutch device.

[0004]

[Means for Solving the Problems]

 The concrete constitution for solving the problem in the present invention is that a shifter 4 is meshed with a coupling 3 fitted to a rotary shaft 2, and the shifter 4 is axially pushed to rotate a rotary transmission member via a synchro member. In the synchromesh clutch device in which the gears are synchronously rotated and the shifter 4 is pushed to mesh with the rotary transmission body, an oil passage 5 to which oil is supplied is formed in the rotary shaft 2, and the oil passage 5 is formed. That is, the axial end surface of the coupling 3 is opened to the outer circumference of the rotary shaft 2 and communicates with the radial groove 6 on the axial end surface side of the coupling 3.

[0005]

[Action]

 For example, in FIG. 1, when the shifter 4 of the forward / reverse transmission 13 is moved to the right, the second gear 17 as a rotary transmission body is moved through the synchronizing parts such as the outer cone 30, the center cone 29, and the inner cone 27. Starts to rotate synchronously, and when the shifter 4 is further moved, the shifter 4 meshes with the first spline of the second gear 17 while meshing with the coupling 3, and connects the coupling 3 and the second gear 17.

While the rotary shaft 2 is rotating, the receiving member 35 provided on the collar 34 scoops the oil in the mission case 11 and forcibly introduces the oil into the oil passage 5 to cause the coupling 3 of the coupling 3 to rotate. It is supplied to the inner peripheral side of the synchronizing member via the radial groove 6 on the axial end face side.

[0007]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. In the first embodiment shown in FIGS. 1 to 3, 11 is a transmission case of a tractor transmission, a main transmission 12 to which power is transmitted from an engine through a dry main clutch or a hydraulic clutch of a transmission, and a forward / reverse rotation. The transmission 13, the auxiliary transmission 14, the PTO transmission 47, etc. are built in.

In the forward / reverse transmission 13, the first gear 16 is spline-fitted to the rear portion of the transmission shaft 15 serving as the output shaft of the main transmission 12, and the rotary shaft 2 is arranged concentrically behind it. The second gear 17 is loosely fitted to the rotary shaft 2, the gear body 19 is loosely fitted to the PTO transmission shaft 18 above them, and the first gear 16 meshes with the first gear portion 20 of the gear body 19. The second gear 17 meshes with the second gear portion 21 of the gear body 19 via the back gear 22, and the double cone synchromesh type is provided between the first and second gears 16 and 17 (both are rotary transmission bodies). A clutch device 1 is arranged.

A coupling 3 is spline-fitted to the rotary shaft 2, a coupling spline is formed on the outer periphery of the coupling 3, and the left and right gears 16 and 17 have the same shape as the coupling spline. A first spline and a second spline are formed. However, the first and second splines of the first gear 16 are formed on the transmission shaft 15 side.

Reference numeral 4 denotes a shifter that is spline-fitted to a coupling spline, has a hollow portion between the inner and outer circumferences, has a shift fork engaging portion on the outer circumference, and slides in the axial direction by a shift fork (not shown). To be done. The shifter 4 slides in the axial direction to selectively connect to the left and right first splines, and to the left first spline to connect the transmission shaft 15 and the rotary shaft 2 via the coupling ring 3. Is connected directly to transmit forward power. In addition, by connecting the shifter 4 to the right first spline, the second gear 17 is connected to the rotary shaft 2 and the reverse power is transmitted from the first gear 16 through the gear body 19 and the back gear 22.

A retainer 26 is spline-fitted to each of the left and right second splines. The retainer 26 has a plurality of claws projecting inwardly of the shaft (on the side of the shifter 4) on the outer circumference thereof, and the outer side of the inner cone 27 is fitted on the inner peripheral side of the claws. The outer peripheral surface of the inner cone 27 has a cone surface that is tapered in the axial direction, and has a concave portion with which the end portion of the first synchronizer pin 28 is engaged. A center cone 29 having a cone surface parallel to the cone surface of the inner cone 27 on the inner and outer circumferences is fitted to the inner cone 27, and an engaging recess formed on the outer surface of the shaft engages with a claw of the retainer 26.

In addition to the first synchronizer pin 28, the shifter 4 is provided with a second synchronizer pin 32 that restricts left and right movements of the left and right center cones 29. The first and second synchronizer pins 28 and 32 are arranged with their phases shifted in the circumferential direction, and both ends thereof are formed in a spherical shape so that they contact the inner cone 27 and the center cone 29 at a point or a small surface close thereto. Therefore, the lubricating oil easily enters between the inner surface of the inner cone 27 and the inner surface of the center cone 29.

Reference numeral 30 denotes a pair of left and right outer cones, each of which has an inner peripheral surface having a cone surface parallel to the cone surface of the center cone 29, and each of which has a plurality of arms projecting in opposite directions in the circumferential direction. There is. Each arm is inserted into the hollow portion of the shifter 4, has an indentation on the inner peripheral surface side, and is engaged with a ball 31 that is repulsed by a spring. Reference numeral 34 is a collar as a spacer that is fitted on the rotating shaft 2 so as to be able to rotate integrally, and a box-shaped receiving member 35 is fixed to the outer periphery thereof. The receiving member 35 has an opening on the leading side in the rotation direction, and can rotate the rotation shaft 2 to scoop oil in the mission case 11. The inner part of the receiving member 35 communicates with a hole 36 formed in the collar 34.

An oil passage 5 is formed on the rotary shaft 2 by an axial groove and two radial grooves communicating with the axial groove, and one radial groove communicates with a hole 36 via a circumferential groove 37. However, oil can be taken in from the receiving member 35, and the other radial groove opens to the axial end face of the coupling 3 and communicates with the radial groove 6 formed on the end face of the coupling 3. Therefore, oil can be supplied to the inner side of the clutch device 1 from between the coupling 3 and the second gear 17.

In the second embodiment shown in FIGS. 4 and 5, a collar 34 that rotates integrally with the rotary shaft 2 and a bush 40 are fitted to the rear portion of the rotary shaft 2, and the bush 40 is mounted on the intermediate wall 41 by a bearing 42. A support 43 is disposed on the front side of the bearing 42, and the support 43 is attached to the intermediate wall 41 to position the bearing 42.

The rear end of the oil passage 5 communicates with the oil passage 45 in the support 43 via the circumferential groove 44 of the bush 40. Reference numeral 46 is a control valve for operating the hydraulic clutch 48 (shown in FIG. 2) of the PTO transmission 47, which has a priority valve in its drain oil passage, and squeezes the drain oil to be returned into the mission case 11 to partially Is made to flow to the oil drain pipe 49. The oil drain pipe 49 is connected to the lower portion of the mission case 11 and communicates with the oil passage 45 via an oil passage 50 formed in the intermediate wall 41 of the mission case 11.

The drain oil of the control valve 46 of the PTO transmission 47 is preferentially sent to the drain pipe 49, and is forcibly supplied to the oil passage 5 via the oil passages 45 and 50, and the clutch device from the oil passage 5 is supplied. 1 as a lubricating oil. It should be noted that the present invention is not limited to the above embodiment, but can be variously modified. For example, when the rotary shaft 2 does not have the collar 34, the rotary shaft 2 may be directly provided with the receiving member 35, and the radial groove 6 may be formed on both end faces of the coupling 3 or the rotary transmission body. It is sufficient that the oil in the oil passage 5 enters from the inner peripheral side of the clutch device 1.

[0018]

[Effect of the device]

 According to the present invention described in detail above, the oil passage 5 to which oil is supplied is formed in the rotary shaft 2, and the oil passage 5 is opened at the outer peripheral surface of the rotary shaft 2 at the axial end surface of the coupling 3 to form a coupling ring. Since it is in communication with the radial groove 6 on the end face side in the three-axis direction, oil can be supplied from the inside to the synchromesh clutch device 1 for lubrication, which reduces wear of the synchromesh member and prevents seizure. Can be prevented.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing a first embodiment of the present invention.

FIG. 2 is a cross-sectional explanatory view of the same.

FIG. 3 is a sectional view taken along line XX of FIG.

FIG. 4 is a sectional view of an essential part showing a second embodiment.

FIG. 5 is a front view of the same section.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Clutch device 2 Rotating shaft 3 Coupling 4 Shifter 5 Oil passage 6 Radial groove 16 First gear (rotary transmission body) 17 Second gear (rotation transmission body) 27 Inner cone (synchro member) 29 Center cone (synchro member) 30 Outer cone (synchro member)

Claims (1)

[Scope of utility model registration request] 1. A shifter (4) is meshed with a coupling (3) fitted to a rotating shaft (2), and the shifter (4) is axially pushed to move a rotary transmission body through a synchro member. In a synchromesh clutch device in which synchronous rotation is performed and a shifter (4) is pushed to mesh with a rotary transmission body, an oil passage (5) to which oil is supplied is formed in the rotary shaft (2), The oil passage (5) is opened to the outer circumference of the rotary shaft (2) at the axial end face of the coupling (3) and communicated with the radial groove (6) on the axial end face side of the coupling (3). Lubricating structure of synchromesh type clutch device.