JPH0564098U - Tilt assist cylinder unit for outboard motors - Google Patents

Abstract

(57) [Summary] [Purpose] To enable tilting up even when the remote operation of the on-off valve is disabled when the outboard motor is tilting down. A first chamber S1 and a second chamber S2 are defined in a cylinder body 11 of a tilt assist cylinder unit, and a communication passage 16 that communicates between the first chamber S1 and the second chamber S2 is bypassed to form a first chamber S1 and a second chamber S2. A bypass passage 25 that connects the first chamber S1 and the second chamber S2 is formed, and an auxiliary opening / closing valve 26 that is manually opened and closed is provided in the bypass passage 25.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a tilt assist cylinder unit that assists in tilting up an outboard motor.

[0002]

[Prior Art]

 A small boat such as a motor boat supports an outboard motor so that it can be rotated up and down with respect to the hull, and a tilt assist cylinder unit is arranged between them (actually, between brackets). Although the tilt-up operation of the outer machine is assisted, the tilt assist cylinder unit disclosed in Japanese Patent Laid-Open No. 63-301197 is known as such a tilt assist cylinder unit.

In the tilt assist cylinder unit disclosed in this prior art, a rod 102 is inserted into a cylinder 101 as shown in FIG. 5, and when the cylinder unit is extended by a piston 103 fixed to the tip of this rod 102. A first chamber S1 that expands to a second chamber S2 and a second chamber S2 that compresses the first chamber S1 and a second chamber S2 that communicate with each other through a communication passage 104 and open / close the communication passage 104 by remote control. By providing a switch valve (switching valve) 105 that can be operated and connecting the operation rod 106 of the switch valve 105 to a lever operated by the driver of the hull via a link or a wire cable, the driver can open and close the switch valve 105 from the ship. The valve 107 of the on-off valve 105 is opened by remote control of the engine to assist in tilting up the outboard motor.

[0004]

[Problems to be solved by the device]

 However, in the conventional tilt assist cylinder unit described above, when the mechanism that remotely operates the on-off valve with the outboard motor tilted down fails due to damage to the link or wire cable, The operation is disabled and the outboard motor cannot be tilted up. Moreover, at this time, if the cause of the failure is the linking mechanism such as the damage of the link or the wire cable as described above, the outboard motor cannot be repaired by the bracket unless it is tilted up, which makes repair difficult.

[0005]

[Means for Solving the Problems]

 In order to solve the above problem, the present invention provides a bypass oil passage that bypasses the on-off valve and connects the first chamber and the second chamber in the cylinder, and an auxiliary device that can be manually operated from the outside in the bypass oil passage. An on-off valve was provided.

[0006]

[Action]

 When a failure occurs in the mechanism that operates the on-off valve remotely, the auxiliary on-off valve can be manually operated to connect the first chamber and the second chamber of the cylinder with the bypass passage, so that the outboard motor can be tilted. You will be able to upload.

[0007]

【Example】

 Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is a rear side view of a small boat to which the tilt assist cylinder unit according to the present invention is applied, FIG. 2 is an external view of the cylinder unit, and FIG. 3 is a cross-sectional view of the main part taken along the line AA of FIG. FIG. 4 is a circuit diagram of the cylinder unit.

A clamp bracket 2 is fixed to the rear part of the hull 1, a swivel bracket 3 is vertically rotatably connected to the clamp bracket 2, and an outboard motor 4 is supported by the swivel bracket 3 and each of the brackets The tilt assist cylinder unit 10 according to the present invention is attached between 2 and 3.

In the tilt assist cylinder unit 10, a rod 12 is inserted into a cylinder body 11, and a piston 13 slidably contacting the inner peripheral surface of the cylinder body 11 is fixed to the tip of the rod 12, and the cylinder unit is extended by the piston 13. A first chamber S1 that expands at this time and a second chamber S2 that compresses are defined, and an oil passage that connects the first chamber S1 and the second chamber S2 is formed in the piston 13, and these oil passages are checked. A valve 14 is provided.

A communication portion 15 is formed on a side portion of the cylinder body 11, and a communication passage 16 that communicates between the first chamber S1 and the second chamber of the cylinder body 11 is formed in the communication portion 15 and further, An on-off valve 17 that can be remotely operated to open and close the communication passage 16 is provided on the side of the main body 11.

The opening / closing valve 17 is configured such that a rod 19 is movably inserted into a valve body 18 screwed to a cylinder body 11, and a valve body 20 for opening and closing the communication passage 16 is attached to a tip of the rod 19. A spring 22 urges the rod 19 to close the valve body 20, and the rear end portion 23 of the rod 19 is connected to an operating lever on the ship via a wire cable or a link.

Further, a bypass passage 25, which bypasses the communication passage 16 and communicates the first chamber S1 and the second chamber S2, is formed in the lower portion of the cylinder body 11, and the bypass passage 25 is opened and closed manually. An auxiliary opening / closing valve 26 that can be moved forward and backward is provided. An O-ring 27 for sealing is fitted to the tip of the auxiliary opening / closing valve 26. However, the sealing means is not limited to the O-ring, and a lip of a rubber seal is printed on the tip of the auxiliary opening / closing valve 26, for example. Alternatively, the mating surface may be crimped and sealed.

Further, a cylindrical joint metal portion 28 provided at the lower end of the cylinder body 11 is rotatably connected to the clamp bracket 2, and the swivel bracket 3 is rotated to a joint metal portion 29 provided at the upper end of the rod 12. It is movably connected.

With the above configuration, when the outboard motor 4 is tilted down and the on-off valve 17 cannot be operated remotely due to a failure of a wire cable or a link, the auxiliary on-off valve 26 is manually operated from the outside. Since the first chamber S1 and the second chamber S2 in the cylinder body 11 are communicated with each other by rotating the bypass passage 25 to open the bypass passage 25, it is possible to assist the tilt-up of the outboard motor 4. As a result, the defective part can be repaired.

[0015]

[Effect of the device]

 As described above, according to the present invention, a bypass oil passage that bypasses the on-off valve and connects the first chamber and the second chamber in the cylinder is provided, and the bypass oil passage can be manually operated from the outside. Since the auxiliary on-off valve is provided, the outboard motor can be tilted up even if a failure occurs in the mechanism that remotely operates the on-off valve.

[Brief description of drawings]

FIG. 1 is a rear side view of a small boat to which a tilt assist cylinder unit according to the present invention is applied.

[Fig. 2] External view of the cylinder unit

FIG. 3 is a sectional view of a main part taken along the line AA of FIG.

FIG. 4 is a circuit diagram of the cylinder unit.

FIG. 5 is a schematic configuration diagram of a conventional tilt assist cylinder unit.

[Explanation of symbols]

4 ... Outboard motor, 10 ... Tilt assist cylinder unit,
11 ... Cylinder body, 12 ... Rod, 13 ... Piston,
16 ... Communication passage, 17 ... Open / close valve, 25 ... Bypass passage, 2
6 ... Auxiliary on-off valve, S1 ... 1st chamber, S2 ... 2nd chamber.

Claims (1)

[Scope of utility model registration request] 1. A rod is inserted into a cylinder, and a piston which defines the inside of the cylinder into a first chamber and a second chamber is attached to a tip portion of the rod to connect and disconnect the first chamber and the second chamber. In a tilt assist cylinder unit having a remotely operable on-off valve for mounting one of the cylinder and the rod to a bracket on the hull side and the other to a bracket on the outboard motor side, the first valve in the cylinder is bypassed by bypassing the on-off valve. A bypass oil passage that connects the first chamber and the second chamber is provided,
A tilt assist cylinder unit for an outboard motor, which is provided with an auxiliary opening / closing valve that can be manually operated from outside in this bypass oil passage.