JPS6018853B2 - shaft coupling - Google Patents

Description

[Detailed description of the invention] The present invention relates to a ball joint for transmitting rotational force.

For example, in some devices that move a converter around a trunnion shaft, there is a device that moves a converter on the ground side in order to transmit power from an electric motor and a reduction gear fixedly installed on the ground to a gear device suspended on the trunnion shaft. A shaft coupling is provided to connect the output drive shaft of the speed reducer and the input driven shaft of the gear device on the trunnion shaft side.

This type of ball joint is not only capable of transmitting large torque at low speeds, but also can reliably transmit torque even if there is relative misalignment of the axes when the drive shaft and driven shaft are installed or due to aging. It is desired that the material be able to absorb and absorb impactive force. The present invention was made in view of these demands, and provides a shaft coupling that can reliably transmit low-speed large torque even if two shafts are misaligned or intersect, and that can also absorb impact force. It provides: FIG. 1 is a partially cutaway side view of the shaft joint of the present invention, and FIG. 2 is a simplified sectional view taken along line n-0 of FIG. This shaft joint transmits the torque of the drive shaft 1 to the driven shaft 2.
The drive-side boss 3 of the drive shaft 11 is fixed by a key 4. Two brackets 5 and 6 are integrally formed on the outer periphery of the drive-side boss 3 in a straight line passing through the center. The driven side boss 11 is fixed to the driven shaft 2 by a key 12,
This boss 11 is formed with an outward facing collar 11a. The rod ends of the single-rod type double-acting cylinders 7 to 10 are pivoted to the brackets 5 and 6 via spherical bearings, that is, pins 7a.
˜10a. The head ends of the cylinders 7-10 are connected in clevis fashion via spherical bearings to the outward facing golden plate 11a by pivots or pins 7b-10b, respectively. Pin 7 that connects the rod end and head end
a to 10a and 7b to 10b are parallel to the marking lines of the drive shaft 1 and the driven shaft 2, respectively. Of these four cylinders 7, 8, 9, 10, the cylinders 7, 10 and 8, 9 installed in parallel each form two parallel sides of a parallelogram link. Pins 7a and 10a are parallel to the axis of drive shaft 1. And pin 7
a and 10a are planes parallel to the longitudinal axes of the cylinders 7, 10 and equidistant from such a plane passing through the axis of the drive shaft 1. The pins 7b to 10b are parallel to the axis of the driven shaft 2 and are equidistant from a plane passing through the wisteria line of the driven shaft 2, which is parallel to the longitudinal axis of the cylinders 7 and 10.
Similarly, pins 8a and 9a are parallel to the drive shaft 1, and pin 8
b, 9b are parallel to the driven shaft 2. Pins 8a and 9a are
The pins 8b and gb are located at the same distance from the plane passing through the axis of the drive shaft 1 which is parallel to the marking line of the cylinders 8 and 9, and the pins 8b and gb are
, 9 are equidistant from a plane passing through the trace line of the driven shaft 2 parallel to the axis of the driven shaft 2. cylinder 7, filled with an incompressible working shaft;
Each of the chambers 10 is connected by a pair of steerable conduits 19, 20, individually indicated by dashed lines, so that the fluid pressures generated in the cylinders 7, 10 by rotational forces cancel each other out. The piston pressure-receiving area of each chamber of the cylinder, which is transported by these two pipes 19, is formed to be equal. shilling 8
, 9 also have a pair of flexible conduits 1 indicated by broken lines.
The pressure receiving areas of the mutually interlocked chambers connected by 3 and 14 are formed to be equal. FIG. 3 shows a cross section taken along the section line m--m in FIG. In this embodiment, the piston 15 has a rod side pressure receiving surface 15a and a head side pressure receiving surface 15a.
It is formed in a stepped shape so that the area is equal to that of b. Reference numerals 16 and 17 indicate spherical bearings. other shillings 7,9,
10 is constructed in exactly the same manner. Incidentally, the cylinders 7 to 10 are attached to the outer collar 11a with the pins 7b to 10b through spherical bearings, and the head ends are attached to the bracket 5 through spherical bearings in a clevis manner. , 6 by pins 7a to 10a.

In the above-mentioned configuration, the operating situation will be explained next.

When the shaft 1 is driven in the direction of the arrow 70, the torque exerts a force on the piston rod of the cylinder 8 via the key 4, the shaft coupling boss 3, the bracket 5, the pin 8a, and the spherical bearing 17.
The hydraulic oil in the hydraulic chamber on the rod side is compressed. At this time, the hydraulic oil in the hydraulic chamber on the head side of the cylinder 9 is similarly compressed, and the pressure is balanced by the pipe 14. The pressure of hydraulic oil in each chamber on the head side of the cylinder 8 and on the rod side of the cylinder 9 is also balanced by the pipe line 13. Therefore, no relative displacement occurs between the cylinder 8 and the piston 15, and rotational torque is transmitted from the head end of the cylinder 8 to the spherical bearing 16 and the pin 8.
b, shaft 2 via outward flange 11, shaft joint boss 11, key 12
can be conveyed to. This means that the other paired cylinders 7,
The same goes for one river. Referring to FIG. 4, axis 1,
The mari lines of 2 are parallel, and the center 71 of axis 1 and the center 7 of axis 2
Assume that 2 and 2 are eccentric by 6.

The cylinders 8 and 9 remain in the shape of a parallelogram, and the hydraulic oil flowing out from the hydraulic chamber 73 on the head side of the cylinder 8 flows into the hydraulic chamber 74 on the rod side of the cylinder 9 via the pipe 13, and the hydraulic oil flows into the hydraulic chamber 74 on the rod side of the cylinder 9. Hydraulic oil flows from the hydraulic chamber 76 on the head side of the cylinder 9 to the hydraulic chamber 75 on the rod side via the conduit 14, and the cylinders 8 and 9 forming a pair tolerate eccentricity 6. The other pairs of cylinders 7 and 10 similarly allow eccentricity 8. Therefore, even if the shafts 1 and 2 are eccentric, they rotate synchronously through the parallelogram link, and rotational power is transmitted as described in the previous paragraph. By using spherical bearings (for example, reference numbers 16 and 17 in Fig. 3), the two shafts 1 and 2 may intersect, or the two shafts 1 and 2 may cross each other.
Even if cylinders 7 to 1 are displaced in the direction of koji, cylinders 7 to 1
0 allows for smooth expansion and contraction operations, making it possible to reliably transmit torque.

Therefore, the pipes 13, 14, 19, 20 and the cylinder 7
The hydraulic oil filled in each chamber of ~10 is
, 2 to alleviate the impact force of the displacement. As described above, according to the present invention, even if the axes of the drive shaft and the driven shaft are misaligned or both shafts are displaced toward the bag, rotational torque is reliably and synchronously transmitted.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway sectional view showing one embodiment of the present invention, and FIG.
The figure is a simplified low-D sectional view of FIG. 1, FIG. 3 is an enlarged sectional view taken along line mm of FIG. 1, and FIG. 4 is a diagram showing the operating state of the mechanism shown in FIG. 1. 1... Drive shaft, 2... Driven shaft, 3...
・・Drive side boss, 4・・・Drive side boss, 7 to 10
, 77, 78... cylinder, 13, 14, 19, 2
0...Pipeline, 15...Piston. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] 1. In a shaft coupling connecting a driving shaft and a driven shaft, the rod ends and head ends of at least one pair of single-rod type double-acting cylinders are arranged so that their longitudinal axes form two parallel sides of a parallelogram link. one of them is mounted on the drive shaft and the other on the driven shaft by a pivot shaft, and the pivot shafts provided on the drive shaft and the driven shaft are parallel to the longitudinal axis of the cylinder. Each chamber of one of the cylinders is spaced equidistantly from each other on both sides of each plane including the axes of the driving shaft and the driven shaft, and is arranged such that the fluid pressures generated in the cylinder due to rotational force cancel each other out. and the other cylinder are individually connected by a pair of pipes, and the piston pressure-receiving areas of the respective chambers communicated with each other by the pipes are formed to be equal.