JPH0225734Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a structure for attaching a reserve tank to a vessel body.

Conventionally, this type of mounting structure includes, for example, mounting a reserve tank to a brake master cylinder. The mounting structure is such that a fitting tube connected to a synthetic resin reserve tank is press-fitted onto the outer periphery of a mounting tube protruding from the cylinder body, and the outer periphery of the fitting tube is tightened. In this case, a tightening band made of steel wire is fitted to the outer periphery of the mounting tube in advance, and the fitting tube is press-fitted into the mounting tube with the tightening band loosened, so that the tightening band can be loosened. Since this is essential, press-fitting workability is poor, and since the tightening band method uses a stopper to tighten at one location, the tightening force tends to be weaker at the part of the mating tube that faces the stopper.
Therefore, it is difficult to tighten it evenly over its entire circumference.

The purpose of the present invention is to provide the above-mentioned mounting structure that can eliminate the above-mentioned problems, and includes a mounting tube that protrudes from the vessel body, and a mounting tube that is integrally connected to the synthetic resin reserve tank through a constriction. A fitting tube with a male thread on the outer circumferential surface is press-fitted onto the outer circumference of the fitting tube, and a fitting tube is loosely fitted into the constriction through the fitting tube, and the fitting tube is inserted from the constriction in the fitted state with the mounting tube of the fitting tube. It is characterized by a non-stretchable endless tightening ring having a female thread on the inner circumferential surface, which is screwed onto the outer circumference of the ring.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. M is a brake master cylinder, and a cylinder body 1 as a container has a mounting tube 2 protruding from it, and a reserve tank 3 is attached to the outer periphery of the mounting tube 2. The fitting tubes 4, which are integrally connected through the constricted portion 5, are press-fitted. The press-fitting depth of the fitting cylinder 4 is regulated by the opening end surface thereof abutting against the stepped portion 2a of the mounting cylinder 2.

A male thread 6 is formed on the outer peripheral surface of the fitting cylinder 4 .

The endless tightening ring 7 is made of a non-stretchable steel plate, and has a thread formed in its peripheral wall by press working, and the female thread 8 on the inner surface of the peripheral wall can be screwed into the male thread 6 of the fitting cylinder 4. The outer diameter of the fitting tube 4 is set to a size that allows the tightening ring 7 to be smoothly screwed in before the fitting tube 4 is press-fitted into the mounting tube 2. After press-fitting, the outer diameter of the fitting cylinder 4 is expanded, so that the tightening ring 7 cannot be screwed into the fitting cylinder 4 unless forced to do so.

Before attaching the reserve tank 3 to the cylinder body 1, the tightening ring 7 is screwed into the fitting tube 4 and passes through it, so that it is loosely fitted into the constriction portion 5 as shown by the chain line. As a result, the tightening ring 7 is held in the constricted portion 5 by the external thread 6 of the fitting cylinder 4, and in this state, the fitting cylinder 4 is press-fitted into the mounting cylinder 2, so that the workability is good.

After the above-mentioned press-fitting operation, the tightening ring 7 is screwed onto the fitting tube 4 again, but in this case, since the outer diameter of the fitting tube 4 has been expanded by the press-fitting, the tightening ring 7 is forced to tighten. When it is screwed onto the fitting tube 4, the fitting tube 4 is evenly pressed inward over its entire circumference and comes into close contact with the mounting tube 2, ensuring good sealing between the fitting tube 4 and the mounting tube 2. Become.

As described above, according to the present invention, since the tightening ring 7 is loosely fitted in advance into the constriction 5 provided in the reserve tank 3, the fitting tube 4 can be secured without being hindered by the tightening ring 7. The press-fitting work can be performed efficiently, and the loose-fitting work can also be performed by moving the tightening ring 7 into the fitting cylinder 4.
It is efficient because all you have to do is screw it into the thread and pass it through. Further, by screwing the tightening ring 7 onto the outer periphery of the fitting cylinder 4, the entire circumference of the fitting cylinder 4 can be evenly and closely contacted with the mounting cylinder 2, and good sealing performance can be maintained between the two.

[Brief explanation of the drawing]

The drawing is a front view, with main parts cut away, of an embodiment of the present invention. 1... Cylinder body as a container, 2... Mounting tube, 3... Reserve tank, 4... Fitting tube, 5...
...Constriction, 6...Male thread, 7...Tightening ring, 8...
...female thread.

Claims (1)

[Scope of utility model registration request] A mounting tube 2 protruding from the container body 1; and a male screw 6 on the outer circumferential surface, which is integrally connected to a synthetic resin reserve tank 3 via a constricted portion 5 and is press-fitted to the outer circumference of the attachment tube 2. a fitting cylinder 4 having a shape; loosely fitted into the constricted part 5 through the fitting cylinder 4, and in a state where the fitting cylinder 4 is fitted with the mounting cylinder 2, the fitting cylinder 4 is inserted from the constricted part 5; There is a female thread 8 on the inner circumferential surface that is screwed onto the outer circumference of the
a non-stretchable endless tightening ring 7;
Mounting structure of the reserve tank to the vessel body.