JPS6343389Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is an engine cylinder block and transmission case that has a function to prevent rolling vibration of the engine in the engine drive system outer casing of industrial vehicles such as forklifts and tractors. The present invention relates to an engine coupling device for making a coupling.

In industrial vehicles such as the forklift,
As shown in Fig. 1, a transmission case b such as a transmission or a torque converter is connected to a cylinder block a of an engine, and a gear case b such as a transmission or a torque converter is connected to the case b. A drive system outer casing e is constructed by connecting an axle housing d through which the drive shaft is inserted, and the rotation of the engine is transmitted via the transmission to the wheels f, through the drive shaft through the axle housing d.
f. As the engine is driven, rolling vibrations occur in the rotational direction, causing vibrations in the cylinder block. By the way, as shown in Fig. 1, this vibration is caused by the cylinder block a.
is attached to the main body frame g via a buffer rubber h, and its vibration is buffered and does not propagate to the main body frame g.However, since the axle housing d is connected to the main body frame g, the transmission case b, c and the axle housing d to the main body frame g. As a result, the main body frame g vibrates, leading to deterioration of the driving environment.

The present invention aims to eliminate the above-mentioned drawbacks,
A cylindrical end plate is provided on the cylinder block, a connecting cylinder provided on the transmission case is fitted onto the plate, and the end plate is attached to the engine cylinder block.
The transmission case is rotatably connected,
The rolling vibration generated in the engine is absorbed by the relative rotation between the end plate and the connecting cylinder,
This prevents vibrations from propagating to the main body frame g.

A first embodiment of the present invention will be described with reference to FIGS. Reference numeral 1 denotes an end plate having a collar 2 fixed to the connecting end of the cylinder block a, from which a cylindrical connecting ring 3 projects. An engaging groove 4 is formed on the outer periphery of the connecting ring 3. Reference numeral 6 denotes a connecting cylinder provided in the transmission case b, and its inner diameter is made equal to the outer diameter of the connecting ring 3. Further, its degree of protrusion is made equal to that of the connecting ring 3.

The connecting cylinder part 6 is externally fitted onto the connecting ring 3, the engaging pin 8 is screwed into the screw hole 7 formed in the connecting cylinder part 6, and the tip end thereof is inserted into the engaging groove 4.

The connecting cylinder portion 6 is rotatably fitted into the connecting ring 3 of the end plate 1, and the engaging pin 8 is engaged with the engaging groove 4, so that the connecting cylinder portion 6 is connected so as to be immovable back and forth. Therefore, even if rolling vibration is propagated from the cylinder block a of the engine to the end plate 1 side, the transmission case b side is held on the ground by the wheels f, f, so that the end plate 1 is The vibration is absorbed by the rotation relative to the main body frame g, and the vibration is prevented from spreading to the main body frame g.

In the embodiment described above, even if the end plate 1 is configured to be externally fitted onto the connecting cylinder portion 6, the effect remains the same.

4 and 5 show a second embodiment of the present invention,
On the outer periphery of the connecting ring 13 of the end plate 11 attached to the cylinder block a, four locking protrusions 14 are protruded at regular intervals at regular intervals in the front and rear thereof. The connecting cylinder portion 16 formed at the rear end of the transmission case b has its longitudinal protrusion length equal to that of the connecting ring 13,
The inner diameter thereof is made approximately equal to the degree of protrusion of the locking protrusion 14 from the center of the connecting ring 13. The connecting cylinder part 1
Four locking protrusions 17 having the same thickness and the same protrusion as the locking protrusions 14 are protruded from the inner surface of 6 at the center of the front and back.

When the connecting cylinder portion 16 is externally fitted onto the connecting ring 13 of the end plate 11, an annular gap S is created therebetween, and within the annular gap S, the locking protrusion 14 and the locking protrusion 17 are aligned in the circumferential direction. They will be placed alternately. Reference numeral 18 denotes a vibration isolating material made of a rubber material or the like that can be elastically contracted in the circumferential direction and provided between the locking projection 14 and the locking projection 17.
Each of the eight gaps created in between is interposed. Further, a roll bearing 19 is provided in the gap created between the collar 12 and the inner surface of the connecting cylinder part 16 before and after the locking protrusions 14 and 17.

The roll bearing 19 allows the end plate 11 and the connecting cylinder portion 16 to rotate smoothly, and the vibration isolating material 18
Elastic contraction and elasticity are alternately repeated in response to the rolling vibration, thereby absorbing the vibration more slowly than in the first embodiment.

In the embodiment described above, the roll bearing 19 may be omitted and only the locking protrusions 14, 17 and the vibration isolating material 18 may be provided in the annular gap S. Omit 18,
Only the roll bearing 19 may be interposed within the annular gap S.

As clarified in the above description, the present invention provides a drive system outer casing e of an engine of an industrial vehicle such as a forklift or a tractor, in which the cylinder block a is provided with cylindrical end plates 1 and 11,
Since the connecting cylinders 6 and 16 provided on the transmission case b are fitted onto the plates, and the transmission case b is rotatably connected to the engine cylinder block a, rolling in the rotational direction occurs in the engine cylinder block a. The vibration is caused by the cylinder block a.
Due to the relative rotation between the transmission case b and the transmission case b, the vibration is absorbed at the connecting part and transmitted to the axle housing d which is connected to the main body frame g, and the vibration to the main body frame g is significantly reduced. It has excellent effects such as improving the driving environment.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the installation state of the drive system outer casing, Figs. 2 and 3 show the first embodiment of the present invention, Fig. 2 is a partially cutaway side view, and Fig. 3 is Fig. 2A. 4 and 5 show the second embodiment, FIG. 4 is a partially cutaway side view, and FIG. 5 is a sectional view taken along line B--B in FIG. 4. a; cylinder block, b; transmission case, d; axle housing, e; drive system outer casing,
1, 11; End plate, 3, 13; Connecting ring,
6, 16; Connecting tube portion, 14, 17; Locking protrusion, 1
8; Vibration isolating material, 19; Roll bearing.

Claims (1)

[Claims for Utility Model Registration] 1. A transmission case is connected to a cylinder block of an engine, and an axle housing is connected to the case, through which a wheel drive shaft is inserted, and which is connected to the vehicle body. In the drive system outer casing, a cylindrical end plate is provided on the cylinder block, and a connecting cylinder provided on the transmission case is fitted onto the plate, so that the transmission case can be rotated around the engine cylinder block. A coupling device for an engine of an industrial vehicle, characterized in that the engine is coupled. 2. Locking protrusions 14 are formed at equal intervals on the outer or inner circumference of the cylindrical end plate of the cylinder block, and the same number of locking protrusions 14 as the locking protrusions 14 are formed on the inner or outer circumference of the connecting cylinder portion of the transmission case. A locking protrusion 17 is formed, and the connecting cylinder portion is fitted externally or internally to the end plate, and the locking protrusion 1 is inserted into the annular gap.
4 and 17 alternately, and the locking protrusions 14 and 1
By inserting a vibration isolating material that can be elastically contracted in the circumferential direction between the 7 and 7, the engine cylinder block
A coupling device for an engine of an industrial vehicle according to claim 1, characterized in that a case of a transmission is rotatably coupled. 3. The transmission case can be rotated around the engine cylinder block by fitting the connecting cylinder part of the transmission case externally or internally into the cylindrical end plate of the cylinder block, and inserting a roll bearing in the annular gap. A coupling device for an engine of an industrial vehicle according to claim 1, characterized in that the coupling device is movably coupled. 4 Locking protrusions 14 are formed at equal intervals on the outer or inner circumference of the cylindrical end plate of the cylinder block, and the same number of locking protrusions 14 as the locking protrusions 14 are formed on the inner or outer circumference of the connecting cylindrical portion of the transmission case. A locking protrusion 17 is formed, and the connecting cylinder portion is externally or internally fitted to the end plate, and the locking protrusions 14 and 17 are alternately faced in the annular gap. ，
A vibration damping material that can be elastically contracted in the circumferential direction is interposed between the locking protrusions 14 and 17, and a roll bearing is interposed in the longitudinal direction of the locking protrusions 14 and 17. A coupling device for an engine of an industrial vehicle according to claim 1, characterized in that the two are rotatably coupled.