JPH0515620Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a connecting device for connecting a hydraulic transmission installed in a construction machine such as a dozer to a load testing device in order to perform a load test after servicing the hydraulic transmission.

(Prior art) As shown in Fig. 1, the hydraulic transmission for construction machinery has an output shaft that is integrated with a bevel gear, and a space between the bevel gear and the case at the tip of the shaft.
It is impossible to connect a load tester to this bevel gear because it is designed to be small.

Therefore, in the past, when a transmission was serviced as a standalone unit, it was not possible to perform a load test and the transmission was shipped as is.

(Purpose) In order to eliminate such inconveniences, this project provides a load test connector that is compatible with output shaft bevel gears, and it is possible to relatively easily create connectors that are compatible with various bevel gears on-site. Not only can it be manufactured, but it can also be used repeatedly for the same type of bevel gear.

Furthermore, it is an object of the present invention to provide a connector that can be easily and reliably attached even if the distance between the rear surfaces of gears is narrow.

(Structure) This proposal relates to a connection device for load testing of a transmission output shaft, and includes a tray-shaped coupling case that surrounds the front surface of the bevel gear and the gear portion of the bevel gear at the end of the transmission output shaft. is provided so that its central axis coincides with the bevel gear, and a flanged tightening ring formed by a pair of half rings is fastened to the open end surface of the case, and the case is provided in a space inside the case. The synthetic resin injected from the injection port provided on the outer periphery is filled and integrated with the bevel gear, and is further connected to the bottom of the case via a universal joint connected to the rotating shaft of the load tester. The joint member is fixedly installed.

(Explanation of the figures) 1 is the transmission body, 1a is the front of the case, 2 is the output shaft, 3 is the bevel gear, 3a is the tooth, 4
is the front surface of the gear, and 5 is the center hole.

Reference numeral 6 denotes a tray-shaped coupling case, and the inner surface of a peripheral wall 7 has an uneven surface formed by vertical grooves 8.

The inner surface of the bottom surface 9 of the case is in contact with the front surface 4 of the bevel gear, and a center pin 10 for centering is screwed into the center thereof.

11 is a joint member attached to the bottom of the coupling case, and 12 is a universal joint connected to the rotating shaft of the load tester.

Reference numeral 13 denotes a flanged bevel gear tightening ring, which is composed of a pair of half rings 15 and 16.

Reference numeral 20 denotes a resin injection port bored in the peripheral wall of the coupling case 6, into which a mixed solution of polyurethane and curing agent in equal amounts is injected. As a result, the space inside the case is filled and solidified.

After the resin is completely cured, a load tester can be connected to perform various performance tests.

(Effect) Cured resin 2 molded inside the cut-off ring case
It has been confirmed that No. 1 maintains sufficient strength even against the torque of the load test, and it is economical because it can be used repeatedly on bevel gears of the same size. Since the bevel gear abutting part of this product is made of resin, it has the effect of reducing noise during rotation.

To remove the coupling case from the bevel gear, remove the bolts 18 and 14 of the tightening ring, separate and remove the half-rings 15 and 16, and push the case out to the front for easy removal. can.

In the present invention, the tightening ring combines a pair of half-rings and can be operated from the circumferential direction to connect or separate, so that it is easy to operate even in a narrow space on the back side of the bevel gear.

[Brief explanation of the drawing]

Figure 1 is a sectional view of the proposed connector installed on the bevel gear of the transmission output shaft, Figure 2 is a plan view of the inner surface of the coupling case, Figure 3 is a plan view of its outer side, and Figure 4 is a tightening case. A plan view of the inner surface of the attached ring, and FIG. 5 is a side view. 6... Tray-shaped coupling case, 13... Tightening ring with flange, 21... Hardened resin.

Claims (1)

[Scope of utility model registration request] A tray-shaped coupling case that surrounds the front surface and gear portion of the bevel gear at the end of the transmission output shaft is provided with its central axis aligned with the bevel gear, and a coupling case is provided on the open end surface of the case. A flanged tightening ring formed into a ring is fastened by a pair of half-rings, and the space inside the case is filled with synthetic resin injected from an injection port provided on the outer periphery of the case, and the above-mentioned bulk is filled. A connection device for load testing of a transmission output shaft, which is integrated with a gear and further has a joint member fixedly connected to the bottom of the case via a universal joint connected to the rotating shaft of a load tester. .