JPH027294Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a hydraulic clutch used in a main engine of a ship, etc.

[Conventional technology]

FIG. 2 shows an example of a conventional clutch used in a marine main engine. In the figure, 1 is a clutch case made of aluminum alloy, 8 is a cylinder recessed in the clutch case 1, 2 is an aluminum alloy piston that slides back and forth within the cylinder 8, and 3 is a cylinder made of aluminum alloy.
is a steel inner sleeve, 4 is a steel outer sleeve, and 5 is a steel outer sleeve.
1 is a steel bearing sleeve, 6 is a bearing, and 7 is a return spring for the piston 2.

The piston 2 reciprocates within the cylinder 8 by hydraulic pressure supplied to and discharged from the cylinder 8 through the oil inlet/outlet 9 . 10a and 10b are seal rings.

[Problems that the idea should solve]

In the above-mentioned clutch, the clutch case 1 is made of aluminum alloy in order to reduce the weight, the sleeves 3 and 4 made of steel with high wear resistance and strength are used for the sliding surface with the piston 2, and the bearing 6 is made of aluminum alloy. A steel sleeve 5 is used for support.

However, the conventional method described above has the following drawbacks.

(1) After the sleeves 4 and 5 are press-fitted into the clutch case 1, the inner diameter of the cylinder 8 and the inner diameter of the sleeve 5 must be machined, which increases the number of processing steps and increases costs.

(2) Since the sleeves 3, 4, and 5 are inserted, the outer diameter increases accordingly, making the device larger.

(3) The number of parts increases due to the sleeve, which also increases costs.

The present invention was developed in view of the above, and an object thereof is to provide a hydraulic clutch which is reduced in processing man-hours and number of parts, and is low in cost and compact.

[Means and actions for solving problems]

In order to solve the above-mentioned problems, the present invention constructs a cylinder by fixing a clutch case made of aluminum alloy and a bearing case made of steel etc. with bolts. It is characterized in that the inner surface of the bush inserted into the clutch case serves as the sliding contact surface on the outer circumferential side of the hydraulic piston, and a rolling bearing is attached to the inner circumference. This eliminates the need for a sleeve for sliding piston contact, a sleeve for press-fitting bearings, etc., and machining of the inside and outer circumferential surfaces of the cylinder can be performed individually before assembling the clutch case and bearing case.

〔Example〕

One embodiment of the present invention will be described below with reference to FIG. 1. Reference numeral 11 is a clutch case made of aluminum alloy, 12 is a bearing case made of steel, and 8 is defined by the clutch case 11 and the bearing case 12. 2 is a piston that slides back and forth within the cylinder 8, 7 is a return spring for the piston 2, 14 is a spring bearing, 4 is a steel sleeve press-fitted into the clutch case 11, and 6 is a rolling bearing.

The clutch case 11 has a plurality of bolts 1
3 is fixed to the bearing case 12. 10a,
10b is a seal ring.

When processing and assembling the clutch, the outer circumferential surface 8a and inner circumferential surface 8b of the cylinder 8 may be finished separately and matched at the pilot part 15 before the clutch case 11 and bearing case 12 are assembled. Therefore, machining of the inner and outer peripheral surfaces 8b and 8a of the cylinder 8 becomes easy.

Further, the piston 2 reciprocates within the cylinder 8 by hydraulic oil supplied and discharged from the oil inlet and outlet port 9, and the inner peripheral surface 8b is made of a bearing case 12 made of steel with high wear resistance.
Since the sleeve is constructed as follows, a sleeve like the conventional one is not required. Further, the bearing 6 may also be press-fitted into the bearing case 12 as it is.

[Effect of idea]

The present invention is constructed as described above.According to the present invention, the outer periphery of the steel bearing case is used as the sliding contact surface with the piston, and the inner periphery is used as the press-fitting surface of the bearing. is unnecessary, reducing the number of parts. Further, since the clutch case and the bearing case are provided separately and are connected by bolts, machining of the inside and outer circumferential surfaces of the cylinder becomes easy. Therefore, the manufacturing cost of the device is reduced compared to conventional ones.

Furthermore, the clutch can be made smaller by eliminating the sleeve.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of essential parts showing one embodiment of the present invention;
FIG. 2 is a diagram corresponding to FIG. 1 showing an example of a conventional clutch. 2... Piston, 6... Bearing, 8... Cylinder, 11... Clutch case, 12... Bearing case, 13... Bolt.

Claims (1)

[Scope of utility model registration request] A clutch case made of an aluminum alloy and a bearing case made of a material with high wear resistance such as steel are fixed with bolts to constitute a cylinder defined by the clutch case and the bearing case, and the outer circumferential surface of the bearing case is A bushing made of a highly wear-resistant material such as steel is inserted into the clutch case, and the inner surface of the bushing is the outer circumference of the hydraulic piston. A hydraulic clutch characterized in that it has a side sliding contact surface and a rolling bearing is attached to the inner periphery of the bearing case.