JP2008256173A - Spool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure wherein a spool can slide following the deformation of a block body when deformed. <P>SOLUTION: The spool 1 comprises a spool body 10 segmentalized at a selective axial position into segmentalized portions 10a, 10b connected to each other via a connection member 12. When the segmentalized portions 10a, 10b are subjected to outer face, the connection member 12 is freely deformed depending on the outer force. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a spool used for a switching valve or the like.

As shown in FIG. 3, the switching valve or the like using the spool has a fluid switching and opening / closing circuit by disposing a slidable spool 6 in the block body 5 constituting the fluid circuit. (As conventional structures of switching valves, JP 2000-170707, JP 2001-159470, etc.).
JP 2000-170707 (FIG. 1) Japanese Patent Laid-Open No. 2001-159470 (FIG. 1)

  By the way, the spool is a rigid body and does not bend. For this reason, when the block body is deformed by heat or an external force, the rigid spool cannot follow the deformation of the block body and cannot slide, causing problems in circuit switching and opening / closing operations.

  The present invention has been devised in view of the above problems, and an object of the present invention is to provide a structure in which the spool can slide following the deformation even if the block body is deformed.

  Therefore, the spool according to the present invention is a spool in which the spool body is divided at an arbitrary position in the axial direction, and the divided portions are connected to each other by a connecting member, and the connecting member has an external force applied to the divided portion. It is characterized by being deformable according to the external force when received.

  As a specific configuration in which the connecting member can be deformed in response to an external force, for example, the material is heat-resistant but is selected to be more plastic than the spool body (with such characteristics as an example) For example, a deformable metal or plastic) or a connection structure between the coupling member and the divided portion that allows the movement of the divided portion (for example, a play is provided in the bearing portion).

  Next, the operation will be described. When an external force is applied to the block body in which the spool of the present invention is incorporated, and the sliding portion inside the block body is deformed, the external force applied to the block body is applied to each part of the spool body. It also takes part. At this time, the divided portions are not deformed, but the connecting members that connect them can be deformed in accordance with the external force, so that the entire spool body follows the deformation of the block body by the deformation of the connecting members.

  According to the present invention, even if the block body is deformed, the spool can slide following the deformation, so that the spool becomes non-slidable as in the prior art, and there is a problem in circuit switching and opening / closing operations. Can be prevented in advance.

  A specific example of the present invention will be described with reference to FIG. The embodiment described below is an example of a spool used for a switching valve. In addition, it is natural that the present invention is not limited to the following embodiments, and may be used for a switching valve having another structure, and other parts may be used as well, such as the number and location of divided parts, and a configuration in which a connecting member is deformed. It may be a configuration.

  The switching valve 2 has a space 30 formed of a sliding surface inside the block body 3, and the spool 1 according to this embodiment is slidably inserted into the space 30. In the spool 1, the main body 10 is divided into two at the substantially central portion in the axial direction, and both divided portions 10a and 10b are connected by a connecting rod 12 penetrating the central portion serving as the substantially axial center thereof. ing. The connecting rod 12 has male threads at its distal end portions 12a and 12b, and its distal end portions 12a and 12b in the state of passing through the female threaded portions of the respective end portions 11a and 11b of both divided portions 10a and 10b are nuts 4. By being fastened, it is fixed to both divided portions 10a and 10b that penetrate therethrough.

  The spool body 10 (10a, 10b) is a tempered carbon steel (eg, sintered carbon steel, alloy steel, sintered alloy steel, etc.) that is a rigid body, while the connecting rod 12 is formed of the divided portion 10a. , 10b is subjected to non-tempered carbon steel (eg, aluminum alloy, stainless steel, acrylic, PTFE plastic, etc.) that is flexible enough to be deformable according to the external force. .

  Since the present embodiment is configured as described above, as shown in FIG. 2, when the block body 3 of the switching valve 2 is deformed by heat or external force and the internal space 30 is deformed, the external force accompanying the deformation is divided into each of the spool body 10. It also covers the parts 10a and 10b. At this time, the divided portions 10a and 10b are made of a rigid body and are not deformed. However, the connecting member 12 for connecting them is flexible, so that it deforms following the deformation of the block body 3. For this reason, even if the block body 3 is deformed, the divided portions 10a and 10b of the spool 1 are slidable, so that the problem of circuit switching does not occur.

  The present invention can be widely used as a spool for switching, opening and closing a fluid flow path.

It is sectional drawing of the embodiment which concerns on this invention. It is sectional drawing which showed the state of this example when a block body deform | transforms. It is a structural diagram of a spool in a conventional switching valve.

Explanation of symbols

1 spool
2 Switching valve
3 blocks
4 Nut
10 (10a, 10b) Spool body part
12 Connecting member

Claims (1)

  The spool body is divided at an arbitrary position in the axial direction, and the divided parts are connected by a connecting member, and the connecting member is deformed according to the external force when the divided part receives an external force. Spool characterized by being free.

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