JP3668265B2 - Vehicle transmission device - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a transmission device applied to various vehicles for agriculture or civil engineering.
[0002]
[Prior art]
2. Description of the Related Art A vehicle transmission device having a continuously variable transmission portion and a gear-type transmission portion that can be switched forward and backward in a transmission system from an engine to an axle is known (see, for example, Japanese Utility Model Publication No. 62-5942). Thus, this type of transmission device is generally provided with a steering transmission unit including a pair of left and right side clutches and side brakes in the gear type transmission unit.
[0003]
[Problems to be solved by the invention]
By the way, in a transmission device provided with a steering transmission unit consisting of a pair of left and right side clutches and side brakes in a gear type transmission unit, the side clutch and side brake are concentrically connected to the left and right axles as the final shaft of the device. -Although it is advantageous to make the entire device simple and compact when the key is composed, the axle portion is low speed and the transmission torque is extremely large, so that a large operating load is required to operate the side clutch and the side brake. It is difficult to operate.
[0004]
Therefore, in order to lightly operate the side clutch and the side brake provided on the axle, it is conceivable to configure the side clutch and the side brake to operate with hydraulic pressure. There is a problem that it becomes complicated and expensive. In order to reduce the operating force of the side clutch and the brake by mechanical means regardless of the oil pressure, it may be possible to incorporate a side brake with an extremely large number of braking plates into the axle, When such a side brake is incorporated in the axle portion, another problem arises in that the lateral width of the portion is extremely increased, which restricts the arrangement of other components of the vehicle. For this reason, at present, a low-torque side clutch shaft is provided one or two shafts higher than the axle portion, and a side clutch and a side brake are incorporated therein so that the operation thereof can be performed with a relatively light operating force. However, in this case, although the operating force is somewhat reduced, the transmission device is enlarged both vertically and horizontally, so that the problem of still restricting the arrangement of other components of the vehicle is It will not be resolved.
[0005]
The present invention has been made in view of the above-mentioned problems, and the object thereof is an apparatus in which a side clutch and a side brake are composed concentrically with left and right axle parts. It is an object of the present invention to provide a transmission device in which a side clutch and a brake can be operated lightly by mechanical operating means without increasing the lateral width of the device, and the vertical dimension of the device can be set freely.
[0006]
[Means for Solving the Problems]
The vehicle transmission device according to the present invention includes a continuously variable transmission (19) capable of switching forward and backward to a transmission system to the left and right axles (28) and (28) supported on the lower portion of the mission case (16). and a vehicle transmission apparatus having a steering transmission section of the geared, the left and right wheel axles (28) (28) a pair of left and right driven shaft in both axle and coaxially between the inner end (29) (29) Are connected to each of the passive shafts 29, 29 and the axles 28, 28 via planetary gear reduction mechanisms 30, 30 and both passive shafts 29 A passive sprocket (36) for directly passively driving power from a continuously variable transmission (19) connected to an upper portion of the mission case (16) at the inner end butting portion of (29), and both passive shafts (29) A ball support (41) consisting of a pair of left and right members wedged and supported by (29), and radial movement to the ball support (41). And a side clutch comprising balls (42) and (42) engaged and disengaged with the passive sprocket (36) by the clutch sliders (43) and (43), and the clutch sliders (43) and (43) ) And the planetary gear speed reduction mechanism (30) (30), a wet multi-plate type friction blur that brakes the passive shafts (29) and (29) separately by the outward movement of the clutch sliders (43) and (43). In a vehicle transmission device having a steering transmission section provided with a key (52) (52), shift forks ( 45 ) ( 45 ) respectively engaged with the left and right clutch sliders ( 43 ) ( 43 ) ) and mission in the upper side clutch housing portion Ke - scan (16) to pivot left and right rotation fulcrum shaft (47L) (47R) to the mounting left and right hydraulic a - arm (46L) (46R) to connect the left and right of the link mechanism between the actuating a - arm (4 L) (46R) are both allowed upwardly extending and their operation A - arm (46L) (46R) is the composition of the two link mechanisms of the left and right clutch toward and away from the same direction of movement.
[0007]
A pair of left and right passive shafts (29) and (29) are provided concentrically with the two axles between the inner end portions of the left and right axles (28) and (28), and each of the passive shafts (29) and (29) and the axle (28 ) And (28) are linked to each other via planetary gear reduction mechanisms (30) and (30), and the power from the continuously variable transmission (19) is connected to the inner end butt of both passive shafts (29) and (29). A passive sprocket (36) for directly passively passing, a ball support (41) comprising a pair of left and right members wedged and supported on both passive shafts (29, 29), and a ball support ( 41) is provided with a side clutch comprising a group of balls (42) and (42) which are supported by the clutch sliders (43) and (43) so as to be movable in the radial direction and are engaged with and disengaged from the passive sprocket (36); The passive shafts (29) and (29) are moved by the outward movement of the clutch sliders (43) and (43) between the clutch sliders (43) and (43) and the planetary gear speed reduction mechanisms (30) and (30). In a vehicle transmission apparatus provided with wet multi-plate friction brakes (52) and (52) for braking on the steering transmission section, the passive sprocket (36) is fitted on the boss section (37). It is supported by holders (39) and (39) provided in the mission case (16) via the left and right bearings (38) and (38), and the inner side in the radial direction of each bearing (38) and (38). the ball to - le (42) (42) a group is positioned, the left and right clutch slider (43) Shifutoho respectively engaging the (43) - and click (45) (45), the upper side clutch housing portion in beam (46L) (46R) and the left and right of the link mechanism between the - scan (16) to pivot left and right rotation fulcrum shaft (47L) (47R) to the mounting left and right hydraulic a - mission Ke there to connect, the operation a - arm (46L) both were upwardly extending the (46R), it Actuation A - is an arm (46L) vehicle transmission device (46R) has the composition of the two link mechanisms of the left and right clutch toward and away from the same direction of movement.
[0008]
[Action and effect of the invention]
In the transmission device according to claim 1, the pair of left and right side clutches and brakes are provided concentrically with the left and right axles (28) and (28), so that the entire device is simple and compact. The side clutch and brake are composed of left and right passive shafts (29) and (29) having lower torque than the left and right axles, and the side clutch is supported by the ball support (41) and moves in the radial direction. In addition, a compact structure having balls (42) and (42) for engaging and disengaging with the passive sprocket (36) has a wide space on the left and right sides, and has a large capacity without increasing the lateral width. Since the friction brakes (52) and (52) can be incorporated, the side clutch and the brake can be operated with a slight operating force by mechanical means regardless of the oil pressure. And the passive sprocket (36) provided in the axle part under the mission case (16) is the output shaft (20) of the continuously variable transmission (19) provided in the upper part of the mission case (16). The transmission device is composed by directly interlocking and connecting with the chain (35), so that the degree of freedom in setting the height of the entire device is large, and it is possible to easily obtain a device according to the relationship with other peripheral devices. Can do.
[0009]
In the transmission device according to claim 2, in the side clutch of the ball structure installed at the inner end butting portion of both the passive shafts (29) and (29), the passive sprocket (36) is connected to the boss portion (37). It is supported by holders (39) and (39) provided in the mission case (16) via left and right bearings (38) and (38) that are fitted externally, and the diameters of the respective bearings (38) and (38). Since the ball (42) (42) group is positioned on the inner side in the direction, the side clutch portion is made more robust and more compact, and the balls (42) (42) are made to be passive sprockets ( 36) Since the sliding strokes of the clutch sliders (43) and (43) for engaging with and disengaging from (36) can be made smaller, the space on the left and right sides of the clutch slider becomes larger and the wet multi-plate type friction brake is increased. (52) The incorporation of (52) is more advantageous.
[0010]
The transmission apparatus according to any one of claims 1 and 2 is provided above the shift clutches (45) and (45) engaged with the left and right clutch sliders (43) and (43) and the side clutch housing portion. The left and right actuating arms (46L) (46R) attached to the left and right rotating fulcrum shafts (47L) (47R) pivotally supported by the mission case (16) are connected by the left and right link mechanisms, respectively. The operating arms (46L) and (46R) are both extended upward so that both operating arms (46L) and (46R) can move the left and right clutches in the same direction. Since the link mechanism is composed, both operating arms (46L) and (46R) are separated from the ground and are less affected by mud, etc., and both operating arms (46L) and (46R) ) And the operating lever of the driving unit are simplified, It became a simple operation without confusion.
[0011]
【Example】
Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a partially cutaway front view of a transmission apparatus according to the present invention, FIG. FIG. 2 is a schematic plan view of a vehicle (combine) to which the device of the present invention is applied.
[0012]
First, the overall configuration of the combine will be schematically described with reference to FIG. 3. The illustrated combine includes an engine (12) on a vehicle body (11) having a pair of left and right crawler travel devices (10) (10), Various devices such as a driving device and a threshing device are provided, and a cutting and conveying device (13) is mounted on the front portion of the vehicle body (11) in the forward direction so as to be movable up and down.
[0013]
Then, the drive device (15) (15) of the crawler travel device (10) (10) is rotationally driven by the transmission device (14) interlocked with the engine (12) and travels, and the engine is in operation. The harvesting work is performed by driving a series of working devices such as a reaping and conveying device (13) and a threshing device with the power of (12).
[0014]
Next, the transmission device (14) will be described with reference to FIGS. An input sprocket (17) is rotatably supported on the upper portion of the mission case (16) via bearings (18) and (18), and a continuously variable transmission (HST. The output shaft (20) of 19) is inserted and wedged, and the rotational power in the forward or reverse direction set by the continuously variable transmission is transmitted to the input sprocket (17).
[0015]
Reference numeral (21) denotes an input pulley of the continuously variable transmission (19), and a belt (22) is wound around the input pulley (21) and the output pulley of the engine (12). Thus, the engine power is input to the continuously variable transmission (19).
Reference numeral (23) denotes a hydraulic pump and a valve for extending and retracting a hydraulic cylinder (not shown) for raising and lowering the cutting and conveying apparatus. The hydraulic pump is always fixed by power passive to the input pulley (21). The hydraulic oil is supplied to and discharged from a hydraulic pump or the like through the suction pipe (25) and the return pipe (26) while sharing the lubricating oil in the mission case. It is like that.
[0016]
Left and right axle cylinders (27) and (27) are detachably attached to the left and right side portions of the lower end portion of the mission case (16), and each of the axle cylinders (27) is driven by the crawler. The left and right axles (28) (28) to which the drive wheels (15) (5) of the apparatus are fitted are rotatably supported, and the inner shaft ends of the respective axles (28) are the mission cases (16). It is extended inside.
[0017]
A pair of left and right passive shafts (29) and (29) concentric with the axles (28) and (28) are disposed between the inner shaft ends of the two axles (28) and (28). The outer shaft end of the shaft (29) and the inner shaft end of the axle (28) are interlocked and connected via a planetary gear reduction mechanism (30), and each planetary gear reduction mechanism (30) , A ring gear (31) fixedly fixed between a support portion provided on the wall surface of the mission case and the inner end of the axle cylinder (27), and a sun gear (32) engraved on the passive shaft (29). And a planetary gear (34) which is supported by a carrier (33) wedged at the inner end of the axle and meshes with the ring gear (31) and the sun gear (32).
[0018]
In addition, a steering transmission unit including a pair of left and right side clutches and a steering brake is incorporated between the left and right planetary gear speed reduction mechanisms (30) and (30). The configuration is as follows.
An input sprocket (17) at the top of the mission case, that is, a passive sprocket (36) that is directly interlocked with a chain (35) to the output shaft (20) of the continuously variable transmission (19) is provided with a boss portion. The holder (39) (39) is rotatably supported by left and right bearings (38) (38) that are fitted on the outer periphery (37). A plurality of ball engaging grooves (40) in the direction are formed. The left and right holders (39) and (39) are formed integrally with each case half of the mission case formed by joining the right and left identical case halves.
[0019]
On the other hand, in the lumen portion of the boss part (37) of the passive sprocket (36), a ball support body (41) comprising a pair of left and right members wedged and supported by the left and right passive shafts (29) and (29) , respectively. ) And a pair of right and left ball support holes located on the radially inner side of the bearings (38) and (38) are formed in the outer peripheral ring portion of the ball support (41). The balls (42) are supported by the respective ball support holes so as to protrude outward in the radial direction.
[0020]
A clutch slider (slidably fitted to the left and right passive shafts (29) and (29)) and fitted to the left and right recesses (41a) and (41a) of the ball support (41). 43) and 43), the balls (42) and (42) are pushed up to engage with the ball engaging grooves (40) separately on the left and right sides. When the ball (42) is engaged with the ball engaging groove (40), the passive sprocket (36) and the ball support (41) are connected by the ball, and the power of the passive sprocket (36) is changed to the left and right. A ball-type side clutch is separately transmitted to the passive shafts (29) and (29).
[0021]
The left and right clutch sliders (43) and (43) are moved and urged inward by the coil springs (44) and (44), respectively, and the ball (42) engages with the ball engaging groove (40). Each clutch slider (43) is shifted against the coil spring (44) and the shift fork (4
5), the ball (42) group retreats into the ball support hole and is disengaged from the ball engaging groove (40) to the passive shaft (29). The transmission is cut off separately on the left and right. 1 and 2, the left side of the figure shows the clutch disengaged state, and the right side shows the clutch engaged state.
[0022]
The left and right shift hooks (45) and (45) are respectively connected to the operating arms (46L) and (46R) via the link mechanisms, and these operating arms (46L and 46R) are operated. A cable (not shown) is connected to an operation lever (not shown) provided in the combine driving device, and is moved outwardly of the clutch sliders (43) and (43) by left and right separate operations of the operation lever. However, the left and right operating arms (46L) and (46R) are higher than the part in which the side clutch is accommodated and are both extended upward and are the same. The clutch is similarly disengaged when it is turned in the direction, that is, when it is turned to the left in the figure.
[0023]
As described above, the left and right operating arms (46L) and (46R) are provided upward, and the left and right link mechanisms are configured as follows in order to operate them in the same direction.
1 and 2, the right link mechanism located on the left side includes a swing arm attached to the pivot shaft of the right shift fork (45) and a pivot shaft of the right operating arm (46R). The swing arm attached to (47R) is interlocked and connected with the right link (48), but the left link mechanism seen on the right side of the figure rotates about the rotation fulcrum shaft (49). The left link (51) pivotally attached to the swinging arm attached to the pivot shaft of the left shift hook (45) is pivotally attached to the swinging plate (50). At the same time, by connecting a swinging arm attached to the rotation fulcrum shaft (47L) of the left operating arm (46L) to the other part of the swinging plate (50), the operating direction is matched with the right link mechanism. Yes.
[0024]
Next, a wet multi-plate friction brake (52) is provided between the left and right clutch sliders (43) and (43) of the side clutch and the left and right planetary gear reduction mechanisms (30) and (30). ) (52).
When each of the friction brakes (52) is further slid and moved to the outside of the set dimension beyond the clutch disengagement position, the multi-plate type brake plate is turned into a planetary gear reduction mechanism (30). ) Is pressed against the side surface of the ring gear (31) to stop the passive shaft (29) from rotating, and conversely, when the clutch slider (43) is returned to the clutch disengagement position, the passive shaft (29 ) Is released. Reference numeral (53) denotes a parking brake for separately braking one friction clutch (52).
[Brief description of the drawings]
FIG. 1 is a partially cutaway front view of a transmission apparatus according to the present invention.
FIG. 2 is an enlarged cross-sectional view of a main part of a part of the device of the present invention.
FIG. 3 is a schematic plan view of a combine to which the device of the present invention is applied.
[Explanation of symbols]
16 mission case 19 continuously variable transmission portion 28 axle 29 passive shaft 30 planetary gear reduction mechanism 36 passive sprocket 37 boss portion 38 bearing 39 holder
41 Ball support 42 Ball 43 Clutch slider 45 Shift fork 46L Left operating arm 46R Right operating arm 47L Rotating fulcrum shaft 47R Rotating fulcrum shaft 52 Friction brake

Claims (2)

The transmission system to the left and right axles (28) and (28) supported at the lower part of the mission case (16) is equipped with a continuously variable transmission (19) and a gear-type steering transmission unit capable of switching forward and backward. A transmission device for a vehicle, wherein a pair of left and right passive shafts (29) and (29) are arranged concentrically with both axles between inner end portions of left and right axles (28) and (28), and each passive shaft ( 29) (29) and the axles (28), (28) are linked to each other via planetary gear speed reduction mechanisms (30), (30), and at the inner end butting portions of both passive shafts (29), (29) A passive sprocket (36) that directly and passively receives power from the continuously variable transmission (19) connected to the upper portion of the case (16), and a wedged support for each of the passive shafts (29) and (29). Bo pair of right and left members which are - le support (41), ball - clutch slider (43) is supported Le support (41) radially movably (43) by passive scan A side clutch comprising balls (42) and (42) engaged with and disengaged from the rocket (36) is provided, and between the clutch sliders (43) and (43) and the planetary gear speed reduction mechanisms (30) and (30). In addition, a wet multi-plate friction brake (52) (52) for braking the passive shafts (29) and (29) separately by the outward movement of the clutch sliders (43) and (43) is provided. in vehicle transmission device that is configured to, Shifutoho respectively engaging the left and right clutch slider (43) (43) - click and (45) (45), the mission Ke in the upper side clutch accommodating part - scan (16) to pivot left and right rotation fulcrum shaft (47L) (47R) to the mounting left and right hydraulic a - to connect arm (46L) (46R) and the left and right of the link mechanism between the operation a - arm (46L) (46R) are both allowed upwardly extending and their operation a - (46L) (46R) is a vehicle transmission device that is compositionally the two link mechanisms of the left and right clutch toward and away from the same direction of movement. A pair of left and right passive shafts (29) and (29) are provided concentrically with both axles between the inner ends of the left and right axles (28) and (28), and the passive shafts (29) and (29) and the axles (28) ( 28) are coupled to each other via planetary gear reduction mechanisms (30) and (30), and the power from the continuously variable transmission (19) is directly applied to the inner end butting portions of the passive shafts (29) and (29). Passive sprocket (36) passively, a ball support (41) consisting of a pair of left and right members each wedged and supported on both passive shafts (29) and (29), and a ball support (41) A side clutch comprising a group of balls (42) and (42) which are supported by the clutch sliders (43) and (43) so as to be engaged with and disengaged from the passive sprocket (36). (43) (43) and the planetary gear speed reduction mechanism (30) (30), the passive shafts (29) and (29) are individually controlled by the outward movement of the clutch sliders (43) and (43). In a vehicle transmission device provided with a wet multi-plate type friction brake (52) (52) and used as a steering transmission portion, the left and right sides of the passive sprocket (36) are fitted to the boss portion (37). The bearings are supported by holders (39) and (39) provided in the mission case (16) via bearings (38) and (38), and the bearings (38) and (38) are radially inward of the bearings. A shift fork ( 45 ) ( 45 ) that positions the balls (42) (42) group and engages with the left and right clutch sliders ( 43 ) ( 43 ) respectively , mission Ke - connected between the arm (46L) (46R) in the left and right link mechanisms - scan (16) to pivot left and right rotation fulcrum shaft (47L) operation a of the right and left attached to (47R) to, the actuating a - both were upwardly extending arm the (46L) (46R), their work A - arm (46L) (46R) is a vehicle transmission device that is compositionally the two link mechanisms of the left and right clutch toward and away from the same direction of movement.

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