Hydraulic adapter unit, hydraulic pipe member, and method for manufacturing hydraulic pipe member

1. A hydraulic adapter unit for coupling a hose with a hydraulic device, comprising:

a substantially cylindrical hose connecting member including: a hose fixing portion positioned at one end side of the hose connecting member and to which the hose is fixed; a first combining portion positioned at the other end side of the hose connecting member; and an intermediate portion linking the hose fixing portion and the first combining portion; and

a pipe member including: a substantially tubular pipe body; a second combining portion disposed at the one end side of the pipe body and separably combined to the first combining portion of the hose connecting member; and a flange portion disposed at the other end side of the pipe body and formed so as to project outward in the radial direction of the pipe body and fixed to the hydraulic device,

wherein the first combining portion of the hose connecting member has a male screw portion formed on an outer peripheral surface of the hose connecting member, and

wherein the second combining portion of the pipe member has a female screw portion formed on an inner peripheral surface of the pipe member and screwed to the male screw portion of the first combining portion.

2. The hydraulic adapter unit according to claim 1 ,

wherein the second combining portion of the pipe member is substantially annular and includes:

one end portion positioned at the one end side of the second combining portion and having the female screw portion formed on the inner peripheral side; and

the other end portion which is positioned at the other end side of the second combining portion and to which the pipe body is inserted and joined on the inner peripheral side,

wherein the thickness of the one end portion is greater than the thickness of the other end portion and greater than the thickness of the pipe body, and the thickness of the other end portion is closer to the thickness of the pipe body than the thickness of the one end portion.

3. The hydraulic adapter unit according to claim 2 ,

wherein the outer diameter of the other end portion is smaller than the outer diameter of the one end portion, and the outer peripheral surface of the other end portion is substantially parallel to the axial direction of the second combining portion.

4. The hydraulic adapter unit according to claim 3 ,

wherein the second combining portion of the pipe member has a tapered portion linking the one end portion and the other end portion and having an outer diameter continuously decreasing from the one end portion toward the other end portion.

5. The hydraulic adapter unit according to claim 1 ,

wherein the pipe body in the pipe member has a bent portion having a bent shape.

6. The hydraulic adapter unit according to claim 1 , further comprising

an annular sealing member fitted to the outer circumferential surface of the first combining portion on the proximal side of the male threaded portion that is screwed into the female threaded portion,

wherein the sealing member is sandwiched between the hose connecting member and the pipe member in a state where the hose connecting member and the pipe member are combined.

7. A hydraulic pipe member for coupling a hydraulic device with a hose connecting member having one end side to which a hose is fixed and the other end side on which a first combining portion is formed, comprising:

a tubular pipe body;

a second combining portion disposed on the one end side of the pipe body and separably combined to the first combining portion of the hose connecting member; and

a flange portion disposed on the other end side of the pipe body and formed to project outward in the radial direction of the pipe body and fixed to the hydraulic device,

wherein the first combining portion of the hose connecting member has a male screw portion formed on an outer peripheral surface of the hose connecting member, and

wherein the second combining portion of the pipe member has a female screw portion formed on an inner peripheral surface of the pipe member and screwed to the male screw portion of the first combining portion,

wherein the second combining portion of the pipe member is substantially annular and includes:

one end portion positioned at the one end side of the second combining portion and having the female screw portion formed on the inner peripheral side; and

the other end portion which is positioned at the other end side of the second combining portion and to which the pipe body is inserted and joined on the inner peripheral side,

wherein the thickness of the one end portion is greater than the thickness of the other end portion and greater than the thickness of the pipe body, and the thickness of the other end portion is closer to the thickness of the pipe body than the thickness of the one end portion, and

wherein the one end portion and the other end portion are each arranged at the respective axial terminal ends of the second combining portion.

8. The hydraulic pipe member according to claim 7 ,

wherein the outer diameter of the other end portion is smaller than the outer diameter of the one end portion, and the outer peripheral surface of the other end portion is substantially parallel to the axial direction of the second combining portion.

9. The hydraulic pipe member according to claim 7 ,

wherein the second combining portion has a tapered portion linking the one end portion and the other end portion and having an outer diameter continuously decreasing from the one end portion toward the other end portion.