JPH0697064B2 - Mobile agricultural machine transmission - Google Patents

Description

TECHNICAL FIELD The present invention relates to a transmission device for a mobile agricultural machine including a continuously variable transmission device and a gear transmission device.

[Conventional technology]

As a transmission of this type of mobile agricultural machine, a friction type continuously variable transmission is interlockingly connected to the transmission upper side of the input shaft, and a gear transmission is provided on the slightly lower side of the friction type continuously variable transmission. In some cases, the input shaft is extended to the lower transmission side and the end of the input shaft is interlocked with the first PTO shaft via a reduction gear attached to the outside of the transmission case. In many cases, the output shaft of the device is provided with a bevel gear at the end located in the above-mentioned power transmission side direction to constitute a power take-out portion for the traveling system (actually developed sho 56-117154).
Issue).

[Problems to be solved by the invention]

However, the above-described transmission is not provided with the second PTO shaft that shifts in synchronization with the shift of the rotational power to the traveling system.
Even if it is provided, it was difficult to extend the output shaft to form the second PTO shaft because the bevel gear and the shaft interfere with each other. Therefore, the working devices that can be linked to the transmission are limited to those that make use of the first PTO shaft or those that have a function of shifting the power from the first PTO shaft.

An object of the present invention is to provide a transmission device for a mobile agricultural machine, which can be used for multiple purposes, by paying attention to such an actual situation and by modifying the gear transmission device to allow the second PTO shaft to be provided side by side.

[Means for solving problems]

The characteristic configuration of the present invention made to achieve the above object is to interlockly connect a continuously variable transmission to the transmission upper hand side of an input shaft supported by a transmission case, and to output the rotary body for output of the continuously variable transmission. The first PTO shaft, which is integrally molded with or interlocked with the input shaft, projects from the transmission case toward the transmission lower side, while being linked to the gear transmission provided on the transmission lower side of the input shaft, and the output of the gear transmission. The shaft is arranged in parallel with the input shaft, one end of the output shaft is located between the continuously variable transmission and the gear transmission to serve as a power take-out portion for the traveling system, and the other end is from the mission case. The second PTO shaft is made to protrude, and the work device mounting portion is provided on the outer surface of the mission case from which both PTO shafts are made to protrude. The action and effect are as follows.

[Action]

That is, according to the above configuration, the gear transmission is further provided on the transmission lower side of the input shaft, and the output side end of the output side is located between the continuously variable transmission and the gear transmission. By making it a power take-out part for the traveling system,
The other end is projected from the mission case so that it can be used as the second PTO shaft, and the work device attached to the work device mounting portion can be interlocked with the first PTO shaft.

〔The invention's effect〕

Therefore, according to the present invention, by installing the second PTO shaft side by side, it becomes easy to install a working device that changes the working speed in synchronization with the change in the vehicle speed, and its application is broader and more versatile than the conventional transmission device of a mobile agricultural machine. Ready to use. For example,
This second PTO axis makes it easy to drive implants.

〔Example〕

Hereinafter, an example of a transmission device for a mobile agricultural machine to which the present invention is applied will be described with reference to FIG.

Around the input shaft (1) supported in the mission case (M), the drive gear (2) fitted to the input shaft (1) and the gear are interlocked to rotate about the shaft core (P). A disk-shaped output rotating body (4) provided with three taper cones (3) and contacting the taper surface portions (7a) of the taper cones (3) to impart frictional rotation resistance to the input shaft (4) The friction type continuously variable transmission (A), which is an example of the continuously variable transmission, is configured by being fitted to 1) so as to be relatively rotatable and slidable.

Then, the output rotating body (4) fitted onto the input shaft (1).
The cylinder shaft (4b) fitted to the boss (4a) is the input shaft (1)
When the input shaft (1) is driven, the drive gear (2) is integrated with the input shaft (1) by extending the end of the input shaft (1) by interlockingly connecting the end portion to the two-shaft non-clutch gear transmission (B). Rotates, the taper cone (3) rotates in conjunction with it, and this rotation power is further transmitted to the output rotating body (4) via frictional force, and the boss portion (4a) causes the cylinder shaft to rotate. It is configured to input to the gear transmission (B) via (4b).

The taper cone (3) is attached to a shaft portion (6) having a driven gear (5) that meshes with the drive gear (2),
The conical body (7) having the tapered surface portion (7a) is externally fitted so as to be slidable in the axial center (P) direction, and the automatic pressure adjusting device (D) is installed on the large diameter side of the conical body (7). It is provided and configured. The automatic pressure adjusting device (D) includes a hat-shaped cam member (8) fitted to a shaft portion (6) so as not to rotate relative to the shaft portion (6), a concave portion (8b) formed in the cam member (8), and a cone. Body (7)
Of the shaft (6), which includes a ball (9) for torque transmission and the like which is interposed between the ball (9) and the recess (7b) formed on the end surface on the large diameter side of
When rotation power is applied to the ball (9), the conical body (7) is urged toward the driven gear (2) side due to a torque reaction to try to escape from the recesses (7b) and (8b) to a flat surface. The taper surface portion (7a) is brought into pressure contact with the outer peripheral edge portion of the output rotating body (4) to increase the frictional force with the output rotating body (4).

In the figure, (10) is a spring for pressurization, and the cone (7) is driven by the driven gear (5) even when the rotation speed of the shaft (6) is low and the automatic pressure regulator (D) is not operating. ) Direction to generate a frictional force between the tapered surface portion (7a) and the output rotary body (4) sufficient to rotate the output rotary body (4).

The taper cone (3) is provided at two positions of the driven gear (5) side of the shaft portion (6) and the automatic pressure adjusting device (D) portion.
That is, the driven gear (5) side portion is directly supported by the mission case (M), and the automatic pressure regulator (D) portion is supported by the mission case (M) through the bearing holder (11). The bearing holder (11) rotatably holds the boss portion (8a) of the cam member (8) via a thrust bearing (12) and a radial bearing (13), and at the same time, a mission case (M). The holder is inserted and fixed to the holder insertion port (14) formed in the direction from the outside of the case in the direction along the axis of rotation (P).

Next, the gear transmission (B) will be described.

Three large and small sun gears (S ₁ ) at the end of the cylinder shaft,
(S ₂ ) and (S ₃ ) are integrally molded, and the first carrier (C ₁ ) is attached to the large-diameter first sun gear (S ₁ ) and the small-diameter second,
Third sun gear (S _2), second, third carriers _{(S 3) (C 2)} , are loosely fitted freely respectively relative rotation (C _3). A first planetary gear (P ₁₎ to bite the first sun gear (S ₁₎ to said first carrier (C _1), to bite a second sun gear (S ₂₎ to said second carrier (C ₂₎ Second planetary gear (P ₂ )
And a third planetary gear (P ₃ ) that meshes with the third sun gear (S ₃ ) is axially supported by the third carrier (C ₃ ). 1st, 2nd, 3rd planetary gears (P ₁ ), (P ₂ ), (P ₃ ), respectively
Three ring gears having inner teeth capable of engaging with, namely, the first, second and third ring gears (L ₁ ), (L ₂ ), (L ₃ ) are sun gears (S ₁ ), (S ₂ ). , (S ₃ ) are arranged on the same axis. Also, these first and second carriers (C ₁ ),
First, second, and third output gears (0 ₁ ), (0 ₂ ), and (0 ₃ ) are formed on the outer peripheral portion of (C ₂ ) and the outer peripheral portion of the third ring gear (L ₃ ), respectively. . The output shaft (17) is supported in parallel with the input shaft (1), and the first driven gear (F ₁ ) fitted to the output shaft (17) is used as the first output gear (0 ₁ ). , Second
The driven gear (F ₂ ) is always meshed with the second output gear (0 ₂ ), and the third driven gear (F ₃ ) is always meshed with the third output gear (0 ₃ ).

A lock mechanism (R) using a cam is provided on the opposite side of the output shaft (17) so that the input shaft (1) is symmetrical, and the first ring gear (L ₁ ), the second ring gear (L ₂ ) and one of the third carrier (C ₃₎ and alternatively fixed are to be able to disable rotation. The lock mechanism (R) is
1st, 2nd, 3rd connected to the mission case (M)
The first, second, and third stoppers (19a), (19b), (19c) are inserted into the through holes (18), (18), (18), respectively, and the ends thereof are input shafts (1). Of the variable speed cam shaft (21) arranged parallel to the input shaft (1) by attaching a ball (20) for biasing to the other end of the shift cam shaft (21). When contacting the ball (20), one of the stoppers (19a), (19b), (19c) is configured to project to the input shaft (1) side.

Then, the speed change cam shaft (21) is slid to operate so that the protrusion (21
When a) contacts the ball (20) of the first stopper (19a), the first stopper (19a) projects to lock the first ring gear (L ₁ ) and the ball (20) of the second stopper (19b). ), The second ring gear (L ₂ ) is locked, and when the ball (20) of the third stopper (19c) is contacted, the third stopper (19c) projects and the third carrier (C ₃ ) Is designed to lock. In addition, (22) is
This is a spring for pushing back the stoppers (19a), (19b), (19c) to release the lock when the projecting edge portion (21a) and the ball (20) are not in contact with each other.

As shown in FIG. 2, when the first ring gear (L ₁ ) is locked, the first planetary gear (P ₁ ) is interlocked with the rotation of the first sun gear (S ₁ ) and the first ring gear (L ₁ ). The first carrier (C ₁ ) rotates and revolves around the inner circumference of L ₁ ), and the first output gear (0 ₁ ) meshes with the first carrier (C ₁ ).
The rotational force is transmitted to the driven gear (F ₁ ) and the output shaft (17). When the second ring gear (L ₂ ) is locked, the second ring gear (L ₂ )
The planetary gear (P ₂ ) rolls around the inner circumference of the second ring gear (L ₂ ) in conjunction with the rotation of the second sun gear (S ₂ ), and revolves around the inner periphery of the second ring gear (L ₂ ). ₂₎ to transmit rotational force to the second driven gear to bite a second output gear rotates (0 ₂₎ (F ₂₎ and an output shaft (17). Also, when the third carrier (C ₃ ) is locked, the planet gear (P ₃ ) is restricted from revolving and rotates only in conjunction with the second sun gear (S ₂ ).
Along with that, the third ring gear (L ₃ ) rotates and transmits the rotational force to the third driven gear (F ₃ ) and the output shaft (17) that mesh with the third output gear (0 ₃ ). By the way, when the first ring gear (L ₁ ) is locked, a low speed forward drive force is applied to the output shaft (17), and when the second ring gear (L ₂ ) is locked, a high speed forward drive force, When the third carrier (C ₃ ) is locked, the reverse drive force is obtained.

The input shaft (1) is projected from the transmission case (M) to the transmission lower side to form a first PTO shaft (25), and power of a constant rotation speed directly connected to the engine portion can be transmitted to the work device.

A bevel gear (23) is provided in order to use the end of the output shaft (17) on the friction type continuously variable transmission (A) side as an output part, and a part for extracting the shift power from the power outlet (24) to the traveling system. In addition, the other end can be projected from the mission case (M) and used as the second PTO shaft (27) to transmit the shifting power to the work equipment such as rice transplanter that needs to change the work speed in synchronization with the vehicle speed. I am doing it.

The work device can be easily attached to the work device attachment portion (28) provided on the outer surface of the mission case (M) projecting the both PTO shafts (25) and (27). Has become.

The mission case (M) is a gear transmission (B)
Therefore, when installing the gear transmission (B) in the mission case (M), various gears and output shafts (17) are sequentially installed in the split case (m) from the bottom. After that, the stop member (26) for retaining and positioning them is attached to the split case (m) with bolts, and then the input shaft (1) and the sun gear (S) are mounted. ₁ ), (S ₂ ) and (S ₃ ) are guided to predetermined positions, and the split case (m) is joined to the mission case (M).

It should be noted that although numbers are added to the claims of the patent claims for convenience of comparison with the drawings, the present invention is not limited to the structures of the accompanying drawings by the entry.

[Brief description of drawings]

The drawings show an embodiment of a transmission device for a mobile agricultural machine according to the present invention. Fig. 1 is a vertical sectional side view, Fig. 2 is a sectional view taken along the line II-II in Fig. 1, and Fig. 3 is III- in Fig. 1. It is a III line sectional view. (1) …… Input shaft, (4) …… Rotator for output, (17) …… Output shaft, (25) …… First PTO shaft, (27) …… Second PTO shaft, (28) …… Work Device mounting part,
(A) …… Unauthorized transmission, (B) …… Gear transmission,
(M) …… Mission case.

Claims (1)

[Claims] 1. A continuously variable transmission (A) is interlockingly connected to a transmission side of an input shaft (1) supported by a transmission case (M), and an output rotor (of the continuously variable transmission (A) ( 4) is interlockingly connected to the gear transmission (B) provided on the transmission lower side of the input shaft (1), and the first PTO shaft (25) integrally molded or interlocking with the input shaft (1) is connected to the mission case. (M) is projected in the transmission downward direction, and the output shaft (17) of the gear transmission (B) is arranged in parallel with the input shaft (1), and one end of the output shaft (17) is continuously variable. It is positioned between the transmission (A) and the gear transmission (B) to serve as a power take-out portion for the traveling system, and the other end projects from the mission case (M) to form the second PTO shaft (27). Work on the outer surface of the mission case (M) with both PTO shafts (25) and (27) protruding. Transmission of the mobile agricultural machine is provided 置取 mounting portion (28).