JP3533793B2 - Crawler type vehicle transmission - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crawler-type traveling transmission device for a traveling vehicle.

[0002]

2. Description of the Related Art In order for a crawler-type traveling vehicle to change its course, a spin turn for rotating one crawler in the opposite direction to the other, a pivot turn for braking one crawler, and one crawler for the other. There are three types of turning methods, namely, a gentle turning, that is, a mild turning (applicant's registered trademark) , in which the crawler is driven in the same direction at a lower speed.

[0003]

A spin-mild transmission that executes all of the three turning methods as described above incorporates many gears and transmission shafts, so that the case of the entire transmission becomes large. Moreover, the manufacturing cost is high because the structure is different from that of the pivot specification which allows only the pivot turn.

Therefore, according to the present invention, by sharing the parts between the two specifications and assembling the transmission device of the spin / mild specification only by adding the special parts to the device of the pivot specification, the manufacturing unit price of the common parts can be reduced. The purpose is to reduce the number and to easily change the specifications.

[0005]

According to a first aspect of the present invention, a mission for independently transmitting the output of the engine to the crawlers on the left and right of the body is provided, and an input shaft 35 for introducing the output of the engine to the mission, A straight traveling gear 47 that transmits the rotation of the input shaft 35, a pair of left and right output gears 48 and 49 that are always connected to the left and right crawlers, and power transmission between the straight traveling gear 47 and the left and right output gears 48 and 49. A pair of left and right side clutches S that can be connected intermittently
a, Sb, a pair of left and right switching gears 42 and 43 that are always connected to the left and right output gears 48 and 49, and the switching gear 4
The left and right switching clutches 40 and 41, which connect the control shafts 38 and 43 to the control shaft 38 in an intermittent manner, and the brake 39, which brakes the control shaft 38, are further provided. 55 of the input shaft 35 is detachably connected to the transmission 55.
An auxiliary input shaft 56 to be connected to the control shaft 38, a spin mild control shaft 61 to be connected to the control shaft 38, and the auxiliary input shaft 56.
A movable gear 5 that rotates together with the movable gear 5 and can move along its axial direction.
7, a mild shaft 58 which is intermittently connected to the moving gear 57, a spin which is intermittently connected between any one of the auxiliary input shaft 56 and the mild shaft 58 and the spin / mild control shaft 61.・ Mild switching clutch 62
The brake 39 brakes both sides or one side of the left and right crawlers, and the spin / mild switching clutch 62 decelerates or reverses the control shaft 38 to decelerate or reverse the crawlers on one side. This will change the course of the aircraft. Invention of Claim 2
Uses the crawler type vehicle as a combine, and the cutting unit 1
Place the post-crop frame 70 diagonally upward from the rear part of 3
Then, after the mowing, the submission is made below the frame 70.
55 is arranged.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION An example of a combine embodying the present invention is shown in FIGS.

11 is a combine crawler, 12L,
Reference numeral 12R indicates the left and right crawler drive shafts. 13 is a mowing part, and 14 is a threshing part (see FIG. 1). FIG. 2 is a developed transverse cross-sectional view of a mission that transmits power of an engine (not shown) to the left and right crawlers 11, 11.

The power of the engine is input to the pump 16 of the hydrostatic continuously variable transmission (HST) via the input pulley 15, and the HST motor 17 is installed side by side with the pump 16. HST
The HST motor 17 is driven by the pump 16.

Reference numeral 18 denotes a mission HST motor shaft connected to the output side of the HST motor 17, and the HST motor shaft 1
A first transmission gear 19 is fixed to the gear 8.

Reference numeral 20 denotes a speed change shaft arranged downstream of the HST motor shaft 18, and an outer peripheral cylinder 21 is rotatably fitted to the outer circumference of the speed change shaft 20. A low speed gear 22, a medium speed gear 23 and a high speed gear 24 are spline-coupled to the outer peripheral cylinder 21. The low speed gear 22, the medium speed gear 23, and the high speed gear 24 rotate integrally and laterally move on the outer peripheral cylinder 21 by a fork member (not shown). The high speed gear 24 always meshes with the first transmission gear 19.

A shifter 25 having an annular groove is spline-coupled to the outer peripheral cylinder 21, and a reaping clutch 26 is arranged at the right end of the transmission shaft 20 against the shifter 25. A claw clutch is formed between the input side and the shifter 25. The output side of the reaping clutch 26 is connected to the transmission shaft 20. 28 is a shifter fork that moves the shifter 25.

A pulley 30 is fixed to the right end of the transmission shaft 20, and power is transmitted from the pulley 30 to the mowing section 14 via a mowing clutch 26.

Reference numeral 31 denotes a first intermediate shaft, which is arranged downstream of the speed change shaft 20 and has a second intermediate gear 32, a third intermediate gear 33 and a fourth intermediate gear 34 fixed to the first intermediate shaft 31. Further, the second transmission gear 32 meshes with the low speed gear 22, and the third transmission gear 33
Is meshed with the medium speed gear 23, and the fourth transmission gear 34 is meshed with the high speed gear 24.

An input shaft 35 is arranged downstream of the first intermediate shaft 31. The fifth transmission gear 36 is fixed to the center of the input shaft 35, and the sixth transmission gear 37 is fixed to the right end of the input shaft 35.
The sixth transmission gear 37 always meshes with the fourth transmission gear 34.

A control shaft 38 is arranged downstream of the input shaft 35.

The control shaft 38 is provided with a brake 39 at the left end and left and right switching clutches 40, 41 at the center. The driving side of the left and right switching clutches 40 and 41 is fixed to the control shaft 38, and the passive side is loosely fitted. Engaging teeth 40a and engaging teeth 40b are provided so as to face each other on the driving side and the passive side of the left switching clutch 40, respectively.

Similarly, the right switching clutch 41 is also provided with engaging teeth 41a and engaging teeth 41b on the driving side and the passive side.

Then, the left switching gear 42 and the right switching gear 43 are fixed to the passive sides of the left and right switching clutches 40, 41, respectively.

The brake 39 is in the form of a disk and comprises a brake body 44 and a brake case 45. The brake body 44 is fixed to the control shaft 38, and the brake case 45 is provided.
Sticks to the mission case. The brake 39 has a structure in which integral discs (not shown) on the brake body 44 side and integral discs (not shown) on the brake case side are alternately arranged.

Reference numeral 46 denotes a first transmission shaft, which is arranged downstream of the control shaft 38. A straight traveling gear 47 is fixed to the central portion of the first transmission shaft 46, and a left output gear 48 and a right output gear 49 are loosely fitted to the left and right of the straight transmission gear 47 on the first transmission shaft 46.

A left output gear 48 and a right output gear 49 are arranged on the left and right sides of the straight traveling gear 47, and left and right side clutches Sa and Sb are formed between the straight traveling gear 47 and these output gears 48 and 49. To do.

Each of the side clutches Sa and Sb is composed of an engaging tooth 48a on the output gear 48 side, an engaging tooth 49a on the right output gear 49 side, and an engaging tooth 47a on the rectilinear gear 47 side opposite to these. To do. Each output gear 48 and 49 is
The spring urges the straight-moving gear 47 side.

The thirteenth transmission gear 50 is fixed to the left output gear 48, and the left output gear 48 is always meshed with the left switching gear 42 to integrally move laterally. Similarly, the right output gear 49 has a first
The 4 transmission gear 51 is fixed, and the right output gear 49 is always meshed with the right switching gear 43 to integrally move laterally.

For example, as shown in FIG.
The engaging tooth 47a of the left output gear 48 is separated from the engaging tooth 47a of the left output gear 48, and the engaging tooth 40b on the passive side of the left switching clutch 40 engages with the engaging tooth 40a on the driving side.
0 is entered.

Further, the engaging tooth 47a of the straight-moving gear 47 and the engaging tooth 49a of the right output gear 49 are engaged with each other, and the passive side engaging tooth 41b of the right switching clutch 41 becomes the driving side engaging tooth 41a. When separated, the right switching clutch 41 is disengaged.

The thirteenth transmission gear 50 and the fourteenth transmission gear 51
A groove is formed in the fork, and fork members 54L and 54R having pins that engage with the groove are respectively arranged. The fifteenth transmission gear 52 is constantly meshed with the thirteenth transmission gear 50,
The sixteenth transmission gear 53 is constantly meshed with the fourteenth transmission gear 51. The fifteenth transmission gear 52 is fixed to the left crawler drive shaft 11L, and the sixteenth transmission gear 53 is fixed to the right crawler drive shaft 11R.

Next, spin turn and mild turn (exit
The applicant's registered trademark) submission 55 will be described.

Reference numeral 56 is an auxiliary input shaft, the tip of which is the input shaft 35.
Insert the plug into one end of the shaft so that both shafts can be connected on the same axis. A moving gear 57 is spline-coupled to the auxiliary input shaft 56, and the moving gear 57 is moved left and right by a shifter fork 64 (see FIG. 3).

Reference numeral 58 denotes a mild shaft, which is arranged downstream of the auxiliary input shaft 56, and has a reduction gear 59 and a seventeenth transmission gear 60 fixed thereto. The reduction gear 59 can be engaged with and disengaged from the moving gear 57. 61 is a spin-mild control axis, which is an auxiliary input axis 5
6 is disposed downstream of the control shaft 6, and the tip of the control shaft 38 is removably inserted into one end of the control shaft 38 to connect the both shafts on the same axis. A spin / mild switching clutch 62 is provided on the spin / mild control shaft 61, and a nineteenth transmission gear 63 adjacent to the spin / mild switching clutch 62 is loosely fitted to the spin / mild control shaft 61. The seventeenth transmission gear 60 always meshes with the nineteenth transmission gear 63 (see FIG. 3).

The spin / mild switching clutch 62 is in the form of a disk and comprises a clutch body and a clutch case.
This is a structure in which integrated disks are alternately arranged on the clutch body side and integrated disks on the clutch case side. The clutch body is splined to the spin / mild control shaft 61, and the clutch case is connected to the nineteenth transmission gear 63. The nineteenth transmission gear 63 is a spin mild control shaft 61.
Play with.

Here, in the case of the submission 55 side,
If a shaft 65 of a shifter fork 64 for moving the moving gear 57 is provided and a hole for the bearing is formed in the case on the side of the transmission 55 instead of the side of the transmission, after removing the transmission 55, the bearing is attached to the transmission. Since there is no hole left for use, it is convenient as it saves the work of closing the hole (see Fig. 3).

As shown in FIG. 4, when the submission 55 is removed from the mission, the subsequent portion is covered with a cover 66.

With the submission 55 attached,
The brake 39 is provided at the left end of the control shaft 38, and the auxiliary input shaft 56 is also provided.
Spin / mild switching clutches 62 are respectively located at the right ends of the. By doing so, the brake 39 and the spin / mild switching clutch 62 are located at both ends of the mission, which is convenient because they can be easily removed during repair and inspection.

In the example of FIG. 2, the left and right switching clutches 40 and 41 are provided on the control shaft 38 between the brake 39 and the spin / mild switching clutch 62. Then, the left output gear 48 and the right output gear 49 loosely fitted to the first transmission shaft 46 are moved by the fork members 54L and 54R, and at the same time, the passive sides of the switching clutches 40 and 41 are moved to move the switching clutch 4.
Although 0 and 41 are turned on and off, since the brake 39 and the spin / mild switching clutch 62 are provided one by one, the entire apparatus can be downsized.

Although the brake 39 and the spin / mild switching clutch 62 are of a wet type, their hydraulic oils are shared by the HST motor 17 and the HST pump 16, and the hydraulic system is unified so that the structure can be simplified. In addition, the control shaft 38 and the end of the spin / mild control shaft 61 do not need to be specially processed to allow the working oil to flow therethrough.
The strength of can be improved.

Further, a left output gear 48 is attached to the first transmission shaft 46,
The right output gear 49 is loosely fitted, and the straight output gear 47 arranged at the center of the first transmission shaft 46 is connected to the left output gear 48 and the right output gear 49.
To connect and disconnect freely. Therefore, the left output gear 48 and the right output gear 49 can be increased in size without coming into contact with the crawler drive shafts 11L and 11R, so that the reduction ratio can be increased with respect to the control shaft 38 and the capacity of the brake 39 can be reduced.

The mechanism of power transmission of this device is as follows.

First, when the power of the engine is transmitted to the HST motor shaft 18 via the HST pump 16 and the HST motor 17, and the first transmission gear 19 and the high speed gear 24 rotate, the rotation of the high speed gear 24 is integrated with the low speed gear. 22 and medium speed gear 23
Rotates. Then, by switching to a low speed, a medium speed or a high speed by a shifter fork (not shown), the second transmission gear 32, the third transmission gear 33, or the fourth transmission gear 34.
The first intermediate shaft 31 rotates via the.

The rotation of the first intermediate shaft 31 causes the fourth transmission gear 3 to rotate.
Transmitted from 4 to the input shaft 35 via the sixth transmission gear 37,
Further, the rotation of the input shaft 35 causes the fifth transmission gear 36 and the rectilinear gear 47 to rotate. Then, the left output gear 48 and the right output gear 49 are coupled to the straight-moving gear 47 to form the left output gear 48.
To rotate the left crawler shaft 12L via the tenth transmission gear 50 and the twelfth transmission gear 53, and move the right crawler shaft 12R from the right output gear 49 via the eleventh transmission gear 51 and the thirteenth transmission gear 54. Rotate. As a result, the left and right crawlers 11, 11 rotate at the same speed and the machine body moves straight.

When the auxiliary input shaft 56 rotates, the moving gear 57 meshes with the fifteenth transmission gear 59 or the seventeenth transmission gear 63. In either case, the seventeenth transmission gear 63 rotates, but since the spin / mild switching clutch 62 is in the disengaged state, the seventeenth transmission gear 63 simply idles, and the rotation of the sub-input shaft 56 rotates. Mild control axis 61
Do not communicate to.

In the case of the leftward pivot turn, the left side clutch Sa is disengaged by the left fork member 54L, and the left side switching clutch 40 is in the engaged state. At this time, the right switching clutch 41 is in the disengaged state.

Then, the control shaft 38 is braked by operating the left brake 39, and the left switching clutch 40, the left switching gear 42, the left output gear 48, the tenth transmission gear 50, the first transmission gear 50, and the first transmission gear 50.
5 The left crawler 11 is braked via the transmission gear 52 and the left crawler shaft 12L. In the case of a left spin turn, the rotation of the first intermediate shaft 31 rotates the input shaft 35 via the fourth transmission gear 34 and the sixth transmission gear 37 as in the case of going straight up to the input shaft 35. And the right crawler 1
The power transmission path to 1 is the same as when going straight.

On the other hand, in transmitting power to the left crawler 11, the auxiliary input shaft 56 rotates integrally with the input shaft 35, and the shifter fork 64 causes the moving gear 57 and the seventeenth transmission gear 6 to rotate.
The meshing of 3 rotates the control shaft 38 via the spin / mild switching clutch 62.

At this time, the left switching clutch 40 is turned on and the left side clutch Sa is turned off. The right switching clutch 41 is disengaged. The rotation of the control shaft 38 rotates the left output gear 48 via the left switching clutch 40 and the left switching gear 42. The left output gear 48 is separated from the straight-moving gear 47, and the rotation of the left output gear 48 is transmitted via the tenth transmission gear 50 and the fifteenth transmission gear 52 to the left crawler shaft 12L.
Communicate to.

In the case of a spin turn in the left direction, the power transmission path of the left crawler 11 has a control shaft 38, as compared with the power transmission path of the right crawler 11, so that the rotation of the right crawler 11 is prevented. It is rotating in reverse.

On the other hand, since the right crawler 11 rotates in the same manner as when going straight, the machine body turns to the left.

Next, a mild turn to the left (of the applicant
(Registered trademark) .

Up to the input shaft 35, it is the same as when going straight, and the power transmission path on the right side is rotated by the input shaft 35 so that the sub-input shaft 5
6 rotates together. The shifter fork 64 meshes the moving gear 57 with the reduction gear 59 to allow the mild intermediate shaft 5 to move.
The control shaft 38 is rotated via the eighth, seventeenth transmission gear 60, the nineteenth transmission gear 63, and the spin / mild switching clutch 62.

The left switching clutch 40 is turned on and the left side clutch Sa is turned off. The right switching clutch 41 is disengaged. The passive side is rotated by the rotation of the driving side of the left switching clutch 40. Then, the left switching gear 42 and the left output gear 48 are rotated to rotate the left output gear 48 at the tenth position.
It is transmitted to the left crawler shaft 12L via the transmission gear 50 and the fifteenth transmission gear 52.

In the case of Mild Turn (registered trademark of the applicant) , the crawler 11 on the left side is the crawler 1 on the right side due to the difference in gear ratio between the power transmission path on the right side and the power transmission path on the left side.
The aircraft turns left because it travels in the same direction and slower than 1.

In the case of turning to the right, the mechanism of power transmission is substantially the same as in the case of turning to the left.

As described above, in the example of FIG. 2, the pivot specification can be changed to the spin mild specification only by mounting the dedicated submission 55 on the mission. Therefore, by producing the mission and the submission separately and combining the two missions as necessary, it is possible to meet any of the specifications, so that the production cost of the mission can be reduced.

Next, in the example of FIGS. 5 and 6, the reaper 13
The post-crop frame 70 is disposed diagonally upward from the rear part of the rear part, and the part of the mission 55 of the mission is projected below the frame 70.

Since the conventional spin mild combine combine has a wide mission width, the distance between the right and left crawlers is long, and in order to avoid overlapping with the mission, the combine is installed in a space where the frame is cut off. There was a risk that there would be a problem in cutting and transporting the grain culm because it was unavoidable.

In this example, since the mission is small, such inconvenience is eliminated, and the transmission 55,
Since the mowing frame is arranged in the space surrounded by the crawler, the mowing frame and the traveling frame, there is an advantage that the space in this part can be effectively used.

[0056]

According to the present invention, by substituting the submission 55 for executing the spin turn and the mild turn (registered trademark of the applicant) to the mission for the pivot turn, the spin mild in which three kinds of turns are possible. Manufacture the specified mission. Therefore, the pivot specification mission can be used as it is for the spin mild specification mission, and most of the components are shared, so that the mission production cost can be reduced.

Further, the mission of the mission can be easily changed because the mission of the spin mild specification can be obtained only by adding the transmission 55 of the dedicated part to the mission of the pivot specification.

Further, compared to the conventional pivot turn specification mission, spin turn and mild turn
Since the exclusive submission (registered trademark of the applicant) 55 is detachable, the mission case can be downsized.

And spin turn, mild turn
According to the specification of (Applicant's registered trademark) , since the mission need only be increased by the amount of the submission 55, the arrangement of the mowing frame can be afforded, the assembling can be facilitated, and the overall productivity can be improved. Furthermore, the invention of claim 2
Then, using the crawler type vehicle as a combine,
Place the post-mowing frame 70 diagonally upward from the rear part
Then, after the mowing, the submission is made below the frame 70.
Since 55 is arranged, a problem occurs in cutting and transporting grain culms.
Absent.

[Brief description of drawings]

FIG. 1 is an overall side view of a combine of an embodiment of the present invention.

2 is a vertical cross-sectional view of the mission of FIG.

FIG. 3 is a side sectional view of a submission.

FIG. 4 is a longitudinal sectional view of a main part of a mission showing a state in which a submission is removed.

FIG. 5 is a partial side view of a reference example of a combine according to the present invention.

FIG. 6 is a partial plan view of a reference example of a combine according to the present invention.

[Explanation of symbols]

11 crawlers 12L, 12R crawler drive shaft 18 Input shaft 31 1st intermediate shaft 35 input shaft 38 control axes 39 brakes 40, 41 switching clutch 42,43 switching gear 47 Straight gear 48,49 output gear 55 Submission 56 Sub input shaft 61 Spin mild control axis 62 Spin / Mild switching clutch Sa, Sb side clutch

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) B62D 11/00

Claims (2)

(57) [Claims] 1. A mission for independently transmitting the output of the engine to the crawler on the left and right of the body, and an input shaft 35 for introducing the output of the engine to the mission, and a linear gear for transmitting the rotation of the input shaft 35. 47, a pair of left and right output gears 48 and 49 that are always connected to the left and right crawlers, and a pair of left and right side clutches that intermittently connect power transmission between the straight-moving gear 47 and the left and right output gears 48 and 49, respectively. Sa and Sb, a pair of left and right switching gears 42 and 43 that are always connected to the left and right output gears 48 and 49, and a left and right switching clutch 40 that intermittently connects between the switching gears 42 and 43 and the control shaft 38. , 41, and a brake 39 for braking the control shaft 38, and the case of the transmission 55 can be attached to and detached from one side of the case of the mission. The sub-input shaft 56 to be connected to the input shaft 35, and the spin mild control shaft 6 to be connected to the control shaft 38 are connected to the transmission 55.
1, a moving gear 57 that rotates together with the auxiliary input shaft 56 and is movable in the axial direction, a mild shaft 58 that is intermittently connected to the moving gear 57, the auxiliary input shaft 56 and the mild shaft 58. A spin / mild switching clutch 62 for intermittently connecting between one of the above and the spin / mild control shaft 61, and braking both sides or one side of the left and right crawlers by the brake 39. A travel transmission device for a crawler type vehicle characterized in that the spin / mild switching clutch 62 decelerates or reverses the control shaft 38 to decelerate or reverse one crawler, thereby changing the course of the machine body. 2. The crawler type vehicle is a combine,
Rear of the reaper 13 Diagonally upward from the frame after cutting
Place 70, Subsequent to the frame 70 after the mowing
The crawler according to claim 1, characterized in that
Drive system for traveling vehicles.