JPH06239152A - Continuously variable transmission for rice transplanter - Google Patents

Abstract

PURPOSE:To make the whole device compact by projecting the input section at one end side and the direct output section at the other end side of the input shaft of the continuously variable transmission out of a transmission case and letting the direct output section be positioned at the direction side identical to that of the output section of the output shaft. CONSTITUTION:In the continuously variable transmission, a drive side split pulley 25 is fatted in an input shaft (drive shaft) 40 which is rotatably borne within a transmission case 39, concurrently a drive split pulley 27 is also fitted in an output shaft (driven shaft) 41, and a belt is installed between both the split pulleys 25 and 27. The input section 42 at one end side and the direct output section 43 at the other end side of the input shaft 40 are projected out of the case 39, and let the direct output section 43 be positioned at the direction side identical to that of a variable output section 78 projected out of the case 39 of the input shaft 41. Variable speed pulleys 44 and 45 are rotatably mounted on the input and output shafts 40 and 41 respectively, a timing belt 57 is installed between a large diameter pulley 56 integrated with the pulley 45 and a rotary pulley 52 integrated with a brake plate 50, so that the direct output section 43 can thereby be driven by the output shaft 40.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuously variable transmission, and more particularly to a continuously variable transmission which is effective when applied to rice transplanters.

[0002]

2. Description of the Related Art A continuously variable power transmission using a continuously variable transmission composed of a split pulley and a belt is disclosed in JP-A-60-73165.
It is shown in the publication.

[0003]

The above are the transmissions of the traveling device, and are not structured so that the working machine can be simultaneously driven while traveling. Moreover, the structure is complicated and the continuously variable transmission is not compactly casing. The agricultural work machine simultaneously takes out power for traveling speed change and power for directly driving the work machine, and there is no compact casing of only the continuously variable transmission mechanism. Therefore, an object of the present invention is to provide a continuously variable transmission capable of compactly casing the continuously variable transmission mechanism.

[0004]

SUMMARY OF THE INVENTION The present invention provides the following continuously variable transmission in order to achieve the above objects. That is, a set of split pulleys and a belt for continuously variable transmission are provided in a continuously variable transmission case, and an input shaft is supported on one side of the continuously variable transmission case and an output shaft is supported on the other side thereof. The split pulley is configured to be supported on the shaft and the output shaft, respectively, and an input portion at one end of the input shaft and a direct output portion at the other end on the opposite side are both provided so as to project out of the continuously variable transmission case. It is a continuously variable transmission characterized in that a variable output shaft protruding from a continuously variable transmission case of the output shaft is arranged on the same direction side as the direct output portion at the other end of the input shaft.

[0005]

[Function] The input shaft at one end of the input shaft and the direct output portion at the other end on the opposite side are both projected outside the continuously variable transmission case, and the variable output portion projecting from the continuously variable transmission case at the output shaft is connected to the other of the input shaft. Since it is located on the same direction side as the direct output part of the end, the continuously variable transmission consisting of the split pulley and the belt can be compactly housed in one casing, and it can be used for traveling speed change and work machine drive like an agricultural work machine. Can be used at the same time.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments shown in the drawings will be described below. First, the rice transplanter will be explained. In FIG. 5, (1) is a passenger vehicle body, and a planting portion (3) is connected to a rear portion of the passenger vehicle body (1) via a lift mechanism (2). The engine (5) is mounted on the body frame (4), and the front wheels (6) are located below the engine (5). The transmission case (7) has transmission cases (8) from the left and right sides thereof, and a rear wheel (9) at the rear end of the transmission case (8). (10) is a driver's seat, (11) is a footstep, and (12) is a steering wheel. The lift mechanism (2) is provided with a top link (13) and a lower link (14) of a link frame, and the link (1
3) The planting part (3) is moved up and down by rocking (14). The planting part (3) comprises a seedling table (15), a float (16) and a transmission case (17).
Further, (18) is a rotary case, and (19) shows a planting arm. The above transmission will be described with reference to FIG. 6. The engine (5) drives the pulley (20) and the belt (21) to drive the pulley (22), and further the pulley (20a) and the belt. The pulley (22a) is driven via (21a), and the hydraulic pump (23) is driven. The hydraulic pump (23) sends hydraulic oil to the elevating part of the planting part and the like. The shaft (24) of the pulley (22) is also provided with a split pulley (25) from which the split pulley (27) is driven via a belt (26).
The split pulley (27) is also connected to the shaft (29) (3) by the gear mechanism in the transmission case (7) via the main clutch (28).
Drive 0). The axis (30) represents a planted drive shaft. A gear (31) driven by a gear mechanism in the mission case (7) drives a propeller shaft (32), and a front wheel (6) and a rear wheel are transmitted via an operating gear mechanism (33) (34) in the differential case. (9) is driven. (35) shows a gear mechanism in a transmission case (8) for driving rear wheels, and (36)
(37) is a drive shaft for the front and rear wheels. Note that (38)
Is a tension pulley of the belt (21) and (22) is a counter pulley.

Next, a description will be given of the above continuously variable transmission in which the operating mechanism for moving the split pulley is provided between the drive-side split pulley (25) and the driven-side split pulley (27). That is, in FIG. 1, reference numeral (39) is a continuously variable transmission case, which is divided into two parts. In this case (39), a drive shaft (40) which is an input shaft and a driven shaft (which is an output shaft) ( 41), and one side of the drive shaft (40) is the input side (42) and the other side is the PTO shaft side.
The O-axis can also drive a car wash pump. Both the one-end input part (42) of the equal input shaft (40) and the direct output part (43) of the other end on the opposite side project outside the continuously variable transmission case. A pulley (25) shown in FIG. 6 is mounted on the drive shaft (40), that is, the input shaft.
1), that is, the output shaft includes the clutch (2
8) and the driven pulley (27) are mounted on the shaft, and the output (7) from the output shaft end (78) as a variable output part thereof is installed.
It is designed to transmit power to. Therefore, the split pulleys (25) and (27) are supported on the input shaft and the output shaft, respectively, and the variable output portion (78) projects out of the continuously variable transmission case (39) and the other parts of the input shaft. It is located on the same side as the direct output part (43) at the end. However, the clutch (28) is provided on the moving pulley (27b) side. Further, between the drive shaft (40) which is an input shaft and the driven shaft (41) which is an output shaft, pulleys (44) (45) for speed change servo are further mounted, respectively, and the pulley (44) Has a larger diameter than the pulley (45), and the pulley (45) is accelerated. A bearing (47) is interposed between the servo plate (46) having a boss screwed (48) to the boss of the pulley (44) and the boss of the movable pulley (25a), and the boss of the movable pulley (25a) shifts. It is inserted into the boss of the servo pulley (44) and can be moved in and out with a screw (48). However, the movable pulley (25a) is
0) is fitted with a spline (49). Moreover, the brake plates (50) (5
1) and the brake plate (50) on one side is the rotary pulley (5
The rotary pulley (52) is fixed to (2) and is externally fitted to a case (54) which is movable left and right via a bearing (53).
The other brake plate (51) is attached to the inner wall of the case (54) facing the brake plate (50) of the case (54). The case (54) is moved left and right by a switching shifter (55) which is operated by a planting lift lever (76) shown in FIG. The pulley (45) described above is integrally formed with the pulley (56).
And the pulley (56) has a larger diameter than the pulley (45), and the timing belt (57) is used to rotate the pulley (5).
2) is driven. In addition, a spring (59) is stretched between the outer side of the clutch housing (58) and the movable pulley (27b). The rotary pulley (52) and the corresponding pulley (56) have the same diameter. Reference numeral (68) in FIG. 5 is a main gear shift lever for moving the sliding gear (75) in the transmission (7).

When the switching shifter (55) is operated to bring the brake plate (50) into contact with the speed change servo plate (46), the pulley (52) becomes the pulleys (44) (45) (5).
6) Since the speed is increased via the timing belt (57), it is rotating faster than the pulley (44), and therefore the speed change servo plate (46) is also increased along with the pulley (52). However, the movable plate (25a) is slowly moved from low speed to high speed by the natural return of the screw pitch due to the difference in rotation between the pulley (44) and the speed change servo plate (46) with the screw (48). Next, when the brake plate (51) is brought into contact with the speed change servo plate (46) by the switching shifter (55), the brake plate (50) is separated from the speed change servo plate and the case (54) becomes the speed change case (39). On the other hand, since it is fixed after the movement, the brake plate (51) fixes the speed change servo plate (46). Despite the fixing of the speed change servo plate, the pulley (44) is still rotating, and therefore the rotation difference causes the movable pulley (25a) to move quickly from high speed to low speed. The stroke of the switching shifter (55) is regulated by applying it to the transmission case (39) as shown in FIG.

Further, the gear shifting servo plate (46) has a second portion.
There are fan holes (60) as shown in (a) and (b) to remove frictional heat from the brake plate. In addition, (61) is a separate boss provided at the end of the output shaft (41) of the transmission case (39), in which the shaft (29) of FIG. 6 is the movable output portion (78) of the output shaft (41). Be combined. Further, in FIGS. 3 and 4, when the clutch pedal (62) is depressed, the clutch arm (64) is operated via the rod (63), and the clutch (28) is engaged via the clutch shaft (41a).
The clutch arm (64) can be moved through the wire (65) from the clutch arm (64) to move the detinting release member of the planting up-and-down lever in the release direction. Can be switched to the low speed side. From the above, since the continuously variable transmission can be switched to the low speed side in conjunction with the operation of the main clutch, smooth start can always be performed at low speed, and seedling collapse, engine stall, etc. at the start can be eliminated.
Further, the wire (67) can be operated from the wire (65) through the connecting plate (66) so that the seedling clutch lever can also be operated. Therefore, conversely, if the seedling splicing clutch lever is operated, the main clutch (28) can be turned off, and the rice transplanter can be turned off and the planting drive can be turned off at once. When it is necessary to turn off the auxiliary drive, it is possible to turn them off at once without individually operating them.

Further, in FIGS. 3 and 4, the rod (63) operated by the main clutch pedal (62) is pivotally supported by the shaft (74) of the frame, and the clutch pedal (62) is constantly supported by the spring (69). ) Is urged to return to its original position. The arm (70) of the shaft (74) operated by the main clutch pedal (62) operates the pin (71) and the link (72), and the U-shaped metal fitting (73) is driven from the link (72), The clutch (28) can be disengaged from the clutch arm (64). In this case, the shaft (74) is a clutch pedal shaft, and the clutch pedal shaft (74) is provided close to the case portion (39a) near the clutch as shown in FIG. Is obtained.

In any case, according to the present invention, a set of split pulleys (25) (27) and a belt for continuously variable transmission are provided in the continuously variable transmission case (39), and the continuously variable transmission case (39) is provided. The input shaft (40) is supported on one side and the output shaft (41) is supported on the other side, and the input shaft (40) and the output shaft (4) are supported.
1) is configured to support the split pulleys (25) and (27) respectively, and the input portion (4) at one end of the input shaft (25) is configured.
2) and the direct output part (43) at the other end on the opposite side are both provided so as to project to the outside of the continuously variable transmission case (39), and the output shaft (41) is made to project to the continuously variable transmission case (39). It is characterized in that the output part (78) is located on the same direction side as the direct output shaft (43) at the other end of the input shaft. With the above-described structure, the power from the input shaft can directly drive the output section to drive the working machine or the like to drive the working machine, and the variable output section can continuously change the traveling speed. Further, since the variable output portion and the direct output portion are located on the same direction side with respect to the continuously variable transmission case, the layout from the engine is simplified.

[0012]

According to the present invention, the input shaft, the direct output section,
The variable output section can be simply and reasonably arranged in the continuously variable transmission case, and only the continuously variable transmission mechanism can be compactly casing.

[Brief description of drawings]

FIG. 1 is a cutaway front view showing a device of the present invention.

2 (a), (b), and (c) are a plan view and a sectional view of a shift servo plate, and a partial view of a switching shifter and a stroke regulating device.

FIG. 3 is a plan view of a continuously variable transmission case.

FIG. 4 is a partially cutaway front view of a continuously variable transmission case.

[Figure 5] Front view of rice transplanter

[Figure 6] Transmission mechanism diagram

[Explanation of symbols]

 5 Engine 7 Mission 25 Split pulley 27 Split pulley 28 Clutch 39 Continuously variable transmission case 40 Drive shaft (input shaft) 41 Driven shaft (output shaft) 42 Input section 43 Direct output section 44 Pulley 45 Pulley 46 Shift servo plate 52 Pulley 55 Switching shifter 56 Pulley 62 Clutch pedal 63 Clutch rod 64 Clutch arm 70 Arm 71 Pin 72 Link 73 U-shaped bracket 78 Variable output section

Claims (1)

[Claims] 1. A set of split pulleys and a belt for continuously variable transmission are provided in a continuously variable transmission case, and an input shaft is supported on one side of the continuously variable transmission case and an output shaft is supported on the other side thereof. ,
The split pulley is configured to be supported on the input shaft and the output shaft, respectively, and the input portion at one end of the input shaft and the direct output portion at the other end on the opposite side are both provided so as to project out of the continuously variable transmission case. A continuously variable transmission characterized in that a variable output shaft protruding from a continuously variable transmission case of the output shaft is arranged on the same direction side as the direct output portion at the other end of the input shaft.