JPH0540099U - Ship rudder grease injection structure - Google Patents

Abstract

(57) [Abstract] [Purpose] To achieve a rudder axis grease injection structure for a ship that is simple in structure and does not interfere with the rudder tube installation deck, and is therefore economical and makes effective use of deck space. A rudderstock 011 having a sleeve 04 fitted outside is inserted into an internally fitted bush 05 of a rudderstock tube 02 having a plurality of vertical ribs radially provided on the outer periphery, and the rudderstock tube 02 and the bush 0 are inserted.
In the rudder shaft grease injection structure of the ship, in which the rudder shaft 011 is lubricated by the grease press-fitted into the horizontal annular grease reservoir groove 06 formed between the rudder shaft pipe 02
A plurality of linear grease injection holes 1 that penetrate the rudder tube vertical ribs 2 obliquely downward from the top surface of the above and reach the grease reservoir groove 06.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a rudder axle grease injection structure for a ship.

[0002]

[Prior Art]

 As a rudder support member 01 of a ship, for example, as shown in the perspective view of FIG. 4, conventionally, a rudder shaft tube 02 is vertically installed at a rear end portion, and its outer circumference is provided by a plurality of radial rudder shaft tube vertical ribs 03. Reinforced products are known, and they are integrally manufactured by casting. By the way, in this type of rudder tube 02, as shown in the vertical sectional view of FIG. 5, regular grease injection is performed in order to prevent seizure due to rotational friction between the rudder axis sleeve 04 and the rudder tube bush 05. In order to do so, horizontal annular grease storage grooves 06 are respectively provided at two upper and lower positions between the rudderstock tube 02 and the bush 05, and the outer peripheral portion thereof is provided with a plurality of grease injection pipes 07 through the deck 08. Each of them is connected to a grease injection metal fitting 09 projecting upward, and its inner peripheral portion is connected between the sleeve 04 and the bush 05 via a plurality of grease supply holes 010. In addition, 011 is a rudder axle, 012 is a bottom girder, and the height H between the bottom outer plate 013 welded to the lower end flange of the rudder tube 02 and the deck 08 welded to the upper end flange is generally 700 mm. It has become a degree.

However, such a structure has the following drawbacks. (1) Since a plurality of grease injection pipes 07 are installed in a narrow section with a height of about 700 mm, the structure is complicated and therefore construction and maintenance are troublesome and uneconomical. (2) Since a plurality of grease injection fittings 09 are projected on the deck 08, it is an obstacle and it is difficult to effectively use the deck space.

[0004]

[Problems to be solved by the device]

 The present invention has been proposed in view of such circumstances, and has a simple structure and does not interfere with the rudderstock for installing the rudder shaft tube, and therefore is excellent in economy and effective use of deck space. It is intended to provide a grease injection structure.

[0005]

[Means for Solving the Problems]

 Therefore, according to the present invention, a rudder shaft having a sleeve externally fitted is inserted into an internally fitted bush of a rudder shaft tube having a plurality of vertical ribs radially provided on the outer periphery, and the rudder shaft tube and the bush are connected to each other. In a rudder axis grease injection structure of a ship in which the rudder axis is lubricated by grease press-fitted into a horizontal annular grease reservoir groove formed between the rudder axis vertical ribs from the top surface of the rudder tube. It is characterized in that it has a plurality of linear grease injection holes penetrating downward and reaching the grease reservoir groove.

[0006]

[Action]

 According to such a configuration, the following actions are performed. Since the grease injection hole that penetrates the rudder tube vertical rib linearly from the top surface of the rudder tube to reach the grease reservoir groove is drilled, the injection structure is simplified and multiple grease injection holes can be installed in a known narrow space. Eliminates the hassle of installing the grease injection pipe of.

[0007]

【Example】

 An embodiment of the present invention will be described with reference to the drawings, in which the same reference numerals as those in FIGS. 4 to 5 denote the same members, respectively. First, in FIG. From the counterbore 3 formed on the upper end of each rudder tube vertical rib 2, each rudder tube vertical rib 2 is drilled to form a plurality of linear grease injection holes that extend diagonally downward to the grease reservoir groove 06. The penetrating part of the grease injection hole 1 of the rudder tube vertical rib 2 is reinforced as a wall thickness as compared with the penetrating part of the known rudder tube vertical rib 03. The grease injection hole 1 may be integrally cast with the rudder tube vertical rib 2 or may be machined later. Next, in the partially enlarged view of FIG. 3, reference numeral 4 denotes an injection hole screw cap screwed to the upper end of the grease injection hole 1.

In such a structure, in order to inject the grease into the clearance between the sleeve 04 and the bush 05, the injection hole screw lid 4 is removed in FIG. 3, and the grease is injected from the upper end of the grease injection hole 1 with a grease gun. When press-fitted, the grease is supplied by flowing into the clearance between the sleeve 04 and the bush 05 through the grease injection hole 1, the grease reservoir groove 06, and the grease supply hole 010.

According to such a structure of the embodiment, the following effects can be obtained. (1) Since the grease injection hole that goes straight through the rudder tube vertical rib from the top surface of the rudder tube to reach the grease reservoir groove is drilled, the injection structure is simplified and the well-known narrow space There is no need to install a plurality of grease injection pipes at the same time, so construction and maintenance are easy and economic efficiency is improved. (2) Since the injection hole screw lid is screwed into the counterbore at the upper end of the grease injection hole, the injection hole screw lid does not protrude from the rudder tube mounting deck and does not get in the way, thus effectively utilizing the deck space. Is possible.

[0010]

[Effect of the device]

 In short, according to the present invention, a rudder shaft having a sleeve fitted outside is inserted into an internally fitted bush of a rudder shaft tube having a plurality of vertical ribs radially provided on the outer circumference, and the rudder shaft tube and the bush are connected to each other. In a rudder axis grease injection structure of a ship in which the rudder axis is lubricated by grease press-fitted in a horizontal annular grease reservoir groove formed between the rudder axis vertical ribs from the top surface of the rudder axis tube. Since it has a plurality of linear grease injection holes that extend diagonally downward to reach the grease reservoir groove, the structure is simple and it does not interfere with the rudder tube installation deck, thus improving economy and deck space. The present invention is extremely useful industrially because it provides a rudder axis grease injection structure for ships that is excellent in effective utilization of the above.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a partially enlarged view of FIG.

FIG. 4 is a perspective view showing a known rudder support member.

5 is a vertical cross-sectional view of the rudderstock tube portion of FIG. 4. FIG.

[Explanation of symbols]

 1 grease injection hole 2 rudder shaft vertical rib 3 counterbore 4 injection hole screw lid 01 rudder support material 02 rudder shaft tube 04 sleeve 05 bush 06 grease reservoir groove 08 deck 010 grease supply hole 011 rudder shaft 013 outer bottom plate

Claims (1)

[Scope of utility model registration request] 1. A rudder shaft having a sleeve externally fitted is inserted into an internally fitted bush of a rudder shaft tube having a plurality of vertical ribs radially provided on the outer circumference, and the rudder shaft is formed between the rudder shaft tube and the bush. In the rudder axis grease injection structure of a ship in which the above rudder axis is lubricated by the grease press-fitted into the horizontal annular grease reservoir groove, the rudder tube vertical rib penetrates diagonally downward from the top surface of the rudder tube. A rudder axle grease injection structure for a ship, comprising a plurality of linear grease injection holes that reach the grease reservoir groove.