JPS641572Y2 - - Google Patents

Description

[Detailed Description of the Invention] (A) Field of Industrial Application The present invention relates to a hydraulic clutch type transmission including a hydraulic transmission shaft equipped with a plurality of hydraulic clutch devices.

(B) Prior Art Techniques relating to hydraulic clutch type transmissions that are equipped with a plurality of hydraulic clutch devices and that change gears by selectively engaging the hydraulic clutch devices are known.

Also known are techniques in which the diameter of the driven gear of the hydraulic clutch device is smaller than the diameter of the clutch housing of the hydraulic clutch device, and techniques in which the clutch housings are arranged on the left and right sides with the driven gear in between.

For example, Japanese Patent Application Laid-open No. 50-50548,
For example, Japanese Patent Publication No. 52374, Japanese Patent Application Laid-open No. 8665-1982, and Japanese Patent Publication No. 20767-1987.

However, in the conventional configuration, several sets of hydraulic clutch devices, driving gears, and driven gears are arranged on a single shaft, and these are connected by keys or splines, so it is difficult to assemble these hydraulic clutch devices. It becomes complicated.

In particular, oil passages are provided through the hydraulic transmission shaft, and the openings of these oil passages are arranged on the surface of the shaft, making it difficult to carve keys and splines.

(c) Problems to be solved by the invention In this way, the invention simplifies the arrangement of the hydraulic transmission shaft and hydraulic clutch device, which tend to have complicated configurations, and makes it compact and easy to assemble. A driven gear and left and right clutch housings are fixedly installed in the center of the hydraulic transmission shaft 4, and using this as a positioning force, the hydraulic clutches, drive bodies, and drive gears that make up the left and right hydraulic clutch devices are fitted from the left and right. It can be assembled by simply doing the following, and there is no need for fixing with keys or splines.In the end, a hydraulic clutch type transmission can be constructed by combining the left and right half cases M1 and right half case M2. It is composed of

(d) Means for solving the problem The purpose of the present invention is as described above. Next, the configuration for achieving the purpose will be explained.

A driven gear G3 is integrally formed in the shape of a collar at an intermediate position on one short hydraulic transmission shaft 4, and two clutch housings 34 having a diameter larger than that of the driven gear G3 are provided on the left and right sides of the driven gear G3. 34 are fitted and fixed back to back, and hydraulic clutches 37, 37 are fitted inside the clutch housings 34, 34 from the left and right openings, and the drive bodies 35,
Drive gears G2a, G2 integrally formed with 35
b is loosely fitted onto the hydraulic transmission shaft 4 outside the clutch housings 34, 34, and the drive gears G2a, G2
The left and right ends of the hydraulic transmission shaft 4 protruding from b are supported by bearings by a left half case M1, a right half case M2, and an oil passage plate 14, which constitute a transmission case M.

(e) Embodiments The purpose and structure of the present invention are as described above, and the details of the present invention will now be explained based on the embodiments shown in the attached drawings.

The transmission case M includes a drive shaft 2, a first-stage transmission shaft 3, a hydraulic transmission shaft 4, a hydraulic transmission shaft 5, a clutch shaft 6, an output shaft 7, a left traveling shaft 8, and a right traveling shaft 9.
are hung parallel to each other.

The transmission case M is formed by halving a left half case M1 and a right half case M2 facing each other and fixing them integrally with a fastener 10.A drive shaft 2 is attached to the side of the left half case M1. The input case 11 is fixed at the extended protrusion 2', the left steering brake case 12A is fixed to the side of the clutch shaft 6, and the left axle case 13A is fixed to the lower end.

Similar to the left half case M1, the right steering braking case 12B and the right axle case 13B are fixed to the right half case M2, and an oil road plate 14 is fixed adjacent thereto, and on the side of the oil road plate 14, A pump case 15 is fixed to the side of the drive shaft 2, and the hydraulic pump 1 is operated by a pump gear 16 built into the pump case 15 and a pump shaft 17 directly connected to the drive shaft 2.
8, and is located at the extension protrusions 4' and 5' of the hydraulic transmission shaft 4 and the hydraulic transmission shaft 5.
9 and 20 are fixed.

In the figure, 1 is an input shaft rotatably supported by input case 11, 22 is a pressure control valve mounted on the top wall of left half case M1, and 23 is right half case M
This is a hydraulic directional control valve mounted on the top wall of 2.

Transmission is transmitted between the input shaft 1 and the drive shaft 2 via bevel gears 24, 24', and the transmission is transmitted between the drive shaft 2 and the first stage transmission shaft 3 via the first stage transmission gear group 25. A large gear 27 loosely fitted to the speed change shaft 3 and the clutch shaft 6
A left intermediate gear 28A and a right intermediate gear 28B, which are loosely fitted to the clutch shaft 6, are transmitted to the side clutch 29 via a hydraulic clutch type transmission section 26.
The left steering brake case 12 can be selectively engaged with the large gear 27 by the brake clutches 30A and 30B.
A, it can be locked on the right 12B.

The left intermediate gear 28A and the right intermediate gear 28B are
Together with the gears 31A and 31B loosely fitted to the output shaft 7 and the gears 32A and 32B fixed to the running shafts 8 and 9, a final reduction gear group 33 is configured, and the rotation of the large gear 27 is transmitted to the running shafts 8 and 9 at a reduced speed. .

The hydraulic clutch type transmission unit 26 includes first-speed hydraulic clutch devices C1 and 3 mounted on the hydraulic transmission shaft 4.
By selectively operating four hydraulic clutch devices: a hydraulic clutch device C3 for gear shift, a hydraulic clutch device C2 for second gear mounted on the hydraulic gear shift shaft 5, and a hydraulic clutch device CR for reverse gear, the first gear shift shaft 3 and a large gear 27, gears G1a and G1b are fixed to the first stage gearshift shaft 3, driving gears G2a and G2b are loosely fitted to the hydraulic gearshift shaft 4, and the driven gear G3 is fixed. , the driving gears G3a and G3b are loosely fitted to the hydraulic transmission shaft 5, and the driven gear G4
to be fixed.

Regarding the hydraulic clutch devices C1 and C3, the driving bodies 35, 35 of the hydraulic clutches 37, 37 are formed integrally with the driving gears G2a, G2b, respectively, and the clutch housings 34, 34 are formed integrally with the driven gear G3.
Formed integrally with

The hydraulic transmission shaft 4, the hydraulic clutch devices C1 and C3 configured thereon, and the drive gear G2
In order to simplify the assembly of a and G2b, they are constructed as follows.

A driven gear 3 is integrally formed in a brim shape at an intermediate position on one short hydraulic transmission shaft 4, and two clutch housings 34 having a diameter larger than that of the driven gear G3 are provided on the left and right sides of the driven gear G3. 34 are fitted and fixed back to back, and hydraulic clutches 37, 37 are fitted into the clutch housings 34, 34 from the left and right openings, and the driving bodies 35, 3 of the hydraulic clutches 37, 37 are fitted.
Drive gears G2a and G2b integrally formed with 5
are loosely fitted onto the hydraulic transmission shaft 4 outside the clutch housings 34, 34, and the drive gears G2a, G2b
The left and right ends of the hydraulic transmission shaft 4 protruding from the transmission case M are supported by bearings by the left half case M1, the right half case M2 and the oil passage plate 14 that constitute the transmission case M.

Hydraulic clutch devices C2 and CR have their drives 35 connected to drive gears G3a and G3, respectively.
b, and is integrally formed with the clutch housing 34,
34 is fixed and integrally formed on the side surface of the driven gear G4 projecting above the flange on the hydraulic transmission shaft 4.

Hydraulic clutch devices C3 and C1, and C2 and
The clutch housing peripheral walls 36 of the CR are spaced apart from each other, and the clutch housing 34,
The driven gears G3 and G4 are arranged between the clutch housing 3 and the diameter of the driven gears G3 and G4.
4 and 34, spaces H and H exist around the driven gears G3 and G4.

Part of the spaces H and H are used to arrange the outer circumferences of the first speed change gear G0 and the large gear 27.

Gear G1a meshes with drive gears G2a and G3a, gear G1b meshes with drive gear G2b,
Transmission is transmitted to drive gears G2a, G2b, and G3a in the forward rotation direction, and transmission is transmitted to gear G1b and drive gear G3b via drive gear G2b, so that both are transmitted in the reverse rotation direction. The driven gear G3 and the driven gear G4 mesh with the large gear 27.

Hydraulic clutch devices C1, C from the hydraulic pump 18
The hydraulic oil to the cylinder chambers of 2, C3, and CR is supplied to the oil passage formed between the oil passage plate 14 and the side surface of the right half case M2, the oil passage transfer tubes 19 and 20, and the hydraulic transmission shafts 4 and 5. The oil is supplied via a drilled oil path under the control of a hydraulic directional control valve 23 and a pressure control valve 22.

The rotational force supplied to the input shaft 1 passes through the drive shaft 2, the first-stage gear group 25, gears G1a and G1b, and then is transferred to the drive gear G2a integrated with the drive body 35 of the hydraulic clutch devices C1, C2, C3, and CR. ,G2b,G
3a and G3b rotate in the normal direction, and the drive gear G3b rotates in the reverse direction.

By the operation of any one of the hydraulic clutch devices C1, C2, C3, CR, any one of the rotating driving gears G2a, G2b, G3a, G3b is connected to the driven gear G3 or G4 by the hydraulic clutch 37 as described above.
connected via.

The rotation of driven gears G3 and G4 is controlled by large gear 27, side clutches 29A, 29B, intermediate gear 28A,
28B, through the final reduction gear group 33, the traveling shafts 8 and 9
The aircraft equipped with the variable speed transmission of the present invention moves forward or backward at a desired speed.

(f) Effects of the invention Since the invention is constructed as described above, it has the following effects.

First, the clutch housings 34 are provided in the middle of the hydraulic transmission shaft 4 in the form of a flange and are provided on the driven gear G3, and two sets of clutch housings 34 are arranged symmetrically on the left and right around the driven gear G3.
34, hydraulic clutches 37, 37, and drive gear G2
By arranging G2b, when assembling, it is inserted from the outside and placed against the parts of the clutch housings 34, 34 and the driven gear G3, which form a collision, to form a semi-structured state, and finally the left side of the transmission case M Since the half case M1 and the right half case M2 can be assembled by fitting and tightening them from the left and right sides, there is no need to fix them to the shafts of each device with keys or splines, and the through-oil passage inside the hydraulic transmission shaft 4 can be assembled. The keyway and spline do not interfere with the opening from which the gas is discharged, making machining easier.

In addition, since the clutch housing and driven gear of the hydraulic clutch device are fixed to the hydraulic transmission shaft 4 from the beginning, there is no need to work to fix them to the hydraulic transmission shaft 4 during assembly. Assembling is easy because positioning can be done simply by inserting it from the outside.

Second, the two hydraulic clutch devices are placed adjacent to each other with a driven gear integrally formed with the hydraulic transmission shaft interposed therebetween, and the clutch housing of the hydraulic clutch device is integrally fixed to the hydraulic transmission shaft; Since the outer diameter of the driven gear is smaller than the outer diameter of the clutch housing of the hydraulic clutch device, a space H is created between the outer diameter of the driven gear and the outer diameter of the hydraulic clutch.
Since the clutch shaft 6 carrying these gears can be brought close to the hydraulic transmission shafts 4 and 5, the transmission case can be made smaller.

Third, the gear on the output side can be formed to have a large diameter regardless of the outer diameter of the hydraulic clutch, allowing a large reduction ratio with the driven gear, and reducing the speed between the hydraulic transmission shaft and the driving shaft. Since unreasonable deceleration is not required, the hydraulic clutch operates at a relatively high rotational speed, or in other words, at a low torque area, which has the effect of allowing the use of a clutch with a small torque transmission capacity.

[Brief explanation of the drawing]

Figure 1 is a skeleton of a speed change transmission device implementing the present invention, Figure 2 is a longitudinal sectional view of the same, and Figure 3 is a
It is a sectional view expanded and shown by the figure SS line. C1, C2, C3, CR...hydraulic clutch device,
G2a, G2b...driving gear, G3, G4...driven gear, 4, 5...hydraulic transmission shaft, 34...clutch housing, 35...driving body, 36...clutch housing peripheral wall, 37...hydraulic clutch.

Claims (1)

[Scope of utility model registration request] A driven gear G3 is integrally formed in a brim shape at an intermediate position on one short hydraulic transmission shaft 4, and two clutch housings 34 having a diameter larger than that of the driven gear G3 are provided on the left and right sides of the driven gear G3. 34 are fitted and fixed back to back, and hydraulic clutches 37, 37 are fitted inside the clutch housings 34, 34 from the left and right openings, and the drive bodies 35,
Drive gears G2a, G2 integrally formed with 35
b is loosely fitted onto the hydraulic transmission shaft 4 outside the clutch housings 34, 34, and the drive gears G2a, G2
A hydraulic clutch type transmission characterized in that the left and right ends of a hydraulic transmission shaft 4 protruding from b are supported by bearings by a left half case M1, a right half case M2 and an oil passage plate 14 that constitute a transmission case M.