JPS6129544Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a flexible joint device.

For example, in a front-wheel drive tractor, it absorbs and corrects misalignment of the differential output shaft, which is the front-wheel drive shaft, and also alleviates abnormal loads that are applied to the shaft. A flexible joint is provided on the differential output shaft for the purpose of preventing damage and also having the function of a safety device such as a differential device. However, when the differential output shaft is connected by a flexible joint, one side of the differential output shaft is connected to the differential device side,
Since the assembly method connects the other side to the front wheel side, when spline fitting one spline part of the differential output shaft to the differential output gear in the differential device, it is necessary to drive from the other side of the differential output shaft. At this time, since an impact load is applied to the ring plate formed of a flexible resin of the flexible joint, there is a high possibility that cracks or cracks will occur in the ring plate.

Therefore, in view of the above problems, the present invention reduces the impact load that acts on the ring plate of the flexible joint when an impact load in the axial direction acts on each shaft member connected by a flexible joint. This is designed to prevent the occurrence of cracks or cracks in the ring plate, and its features include a flange section provided at the end of each shaft member, and a flexible resin plate formed between the flange sections. In a flexible joint device connected through a ring plate, the flexible joint can be bent to each other through an opening in the ring plate in order to transmit an axial impact load acting on one shaft member to the other shaft member. Impact transmitting portions that abut against and do not deform in the axial direction are provided on mutually opposing end surfaces of each shaft member.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In FIGS. 1 to 4, 1 is a tractor body, which includes an engine 2, a transmission case 3, a front axle frame 4, and the like.

A radiator 5 is installed upright in the middle of the front axle frame 4.

A battery support 6 is detachably attached to the front end side of the front axle frame 4, and a battery 7 is mounted and fixed on the upper surface of this battery support.

8 is the bonnet, engine 2, radiator 5
etc. are covered so that they can be opened and closed from above.

Reference numeral 9 denotes a front wheel device, which has a built-in differential device 11 in the center of the front axle 10 in the axial direction. The front axle 10 is swingably suspended from the vehicle body 1 through cooperation between the front axle 10 and a protrusion 14 provided on an extension of the axial center of the differential drive shaft 12.

The front axle 10 has a pair of left and right cylindrical parts 15, 15, and the cylindrical parts 15 are made of sheet metal.

The differential output shaft 16 is surrounded by the cylindrical portion 15, and the inside of the cylindrical portion 16 is enclosed. At the outer end, the bearing device 17,1
The spline portion 19 at the inner end of the differential output shaft 16 is connected to the differential output gear 20 of the differential device 11, and the spline portion 21 at the outer end is connected to the reduction gear device 2.
The two bevel pinion gears 23 are spline-fitted to each other. The torque from the differential output shaft 16 is transmitted to the speed reduction device 22 to drive a pair of left and right front wheels 24, 24, respectively.

The differential output shaft 16 is divided into a first shaft member 25 and a second shaft member 26 approximately in the middle thereof, which are connected by a flexible joint 27. The flexible joint 27 is connected to the first shaft member 2 as shown in FIGS. 3 and 4.
5 and the connecting end of the second shaft member 26, there are cross plates 28, 29 (flange portions) arranged orthogonally to each other.
is fixed, and is formed by embedding glass fiber in thermosetting resin between the cross plates 28 and 29.
They are connected by fastening bolts 31 with a flexible ring plate 30 made of FRP interposed therebetween. After the connection, the impact transmitting parts 3 contact each other through the opening 32 formed at the center of the ring plate 30.
3 and 34 are the first shaft member 25 and the second shaft member 26
It protrudes from the center in the axial direction.

The end portions of each of the impact transmitting portions 33 and 34 are each formed into a spherical shape, and are brought into contact with each other so as to be bendable.

Since the embodiment of the present invention is constructed as described above, when the differential output shaft 16 is driven into the differential output gear 20 of the differential device 11 from the other end, an impact load in the axial direction is applied. However, since the impact load is transmitted through the impact transmission parts 33 and 34, the impact load acting on the ring plate 30 of the flexible joint 27 is small, and therefore, the ring plate 30 is not cracked when the differential output shaft 16 is assembled. This completely prevents the occurrence of cracks and allows for stronger driving.
Easy to assemble.

In addition, by preventing the ring plate 30 from being unintentionally damaged, the initial purpose of the function of absorbing and correcting axis misalignment and the function of absorbing and relieving ordinary loads can be fully exerted.

5 and 6 show other embodiments,
FIG. 5 shows a radial direction in which a spherical part 35 is formed at the end of the impact transmitting part 33 of the first shaft member 25, and the spherical part 35 can be freely fitted and removed at the end of the impact transmitting part 34 of the second shaft member 26. This embodiment shows an example in which a cylindrical hole 36 is formed, and in this embodiment, the impact load in the axial direction is transmitted through the impact transmitting portions 33 and 34 not only during driving but also during tensioning. , damage to the ring plate 30 can be more completely prevented. FIG. 6 shows that the second shaft member 26 is constituted by a cylindrical shaft member having a spline portion 37 formed on the inner periphery, an impact transmitting portion 34 is fixed to a cross plate 29, and A spline shaft 38 is fitted into a spline portion 37 of the biaxial member 26 so as to be movable forward and backward. Therefore, it can be optimally used in a front axle structure with freely adjustable tread.

In the above embodiments, a single flexible joint 27 is shown, but a plurality of flexible joints 27 may be provided. Further, a plurality of ring plates 30 may also be provided in a stacked manner. Furthermore, the cross plate 28,
The shape of 29 is also not limited to the shape of the example. In addition, although the differential output shaft 16 is provided with a flexible joint 27, the flexural joint 27 is
It may be provided between the shaft members, and is not limited to the differential output shaft 16.

In FIG. 1, between the front end of the bonnet 8 and the radiator 5 and above the battery 7, an auxiliary fuel tank 39 is mounted and held on auxiliary tank supports 40 extending upward from both sides of the battery support 6. It shows what is happening. It should be noted that the auxiliary fuel tank 39 may be connected through a pipe to the main fuel tank 41 provided at the rear of the engine 2, or the fuel may be transferred to the main fuel tank 41. Therefore, if such an auxiliary fuel tank 39 is provided, a large amount of fuel can be loaded and continuous work can be carried out for a long time in the field, saving the trouble of refueling during work and improving work efficiency. This has the advantage of improving performance.

The present invention is a flexible joint device in which shaft members are connected through a ring plate made of flexible resin, in which an axial impact load acting on one shaft member is transferred to the other shaft member. contacting each other refractably through the opening of the ring plate for the purpose of transmitting the information;
In addition, since the impact transmitting portion that does not deform in the axial direction is provided on the mutually opposing end surfaces of each shaft member, when an impact load in the axial direction acts between the shaft members, the impact load is transferred to the impact transmitting portion. Since the impact load is transmitted to the other shaft member via the flexible joint, the impact load acting on the ring plate of the flexible joint is reduced, and damage such as cracks and cracks to the ring plate can be prevented. Further, it has the advantage that it has a simple configuration and is easy to manufacture.

[Brief explanation of the drawing]

Fig. 1 is a side view of a tractor equipped with an embodiment of the present invention, Fig. 2 is a partially expanded sectional view of the front wheel device in Fig. 1, Fig. 3 is an enlarged sectional view of the main part of Fig. 2,
FIG. 4 is a sectional view taken along the line of FIG. 3, and FIGS. 5 and 6 are sectional views showing main parts of other embodiments. 25...First shaft member, 26...Second shaft member, 2
7... Flexible joint, 28, 29... Cross plate, 30
...Ring plate, 32...Opening, 33, 34...
Shock transmission part.

Claims (1)

[Scope of utility model registration request] A flange portion is provided at the end of each shaft member,
In a flexible joint device in which the flange portions are connected via a ring plate formed of flexible resin, an axial impact load acting on one shaft member is transmitted to the other shaft member. A flexible joint device characterized in that impact transmitting portions that bendably abut each other through an opening in a ring plate and do not deform in the axial direction are provided on mutually opposing end surfaces of each shaft member.