JP-7855140-B2 - Pump mounting structure

Inventors

• 高野 崇弘
• 大森 裕介
• 加藤 史恭

Assignees

• カヤバ株式会社

Dates

Publication Date

20260507

Application Date

20240325

Priority Date

20230328

Claims (4)

1. A mounting structure for attaching a pump housing to an object to be mounted, The aforementioned housing is An insertion hole through which the fastening member is inserted, The pump has a suction port for guiding liquid to the pump or a discharge port for guiding liquid discharged from the pump, and a protruding portion formed to protrude from it. The mounting body is A fastening hole formed in the housing corresponding to the insertion hole, through which the fastening member is fastened, The housing has an insertion hole into which the protruding portion is inserted, The aforementioned mounting structure is A cylindrical portion is provided that protrudes from one of the insertion hole and the fastening hole, through which the fastening member is inserted, The other of the insertion hole and the fastening hole is provided with a fitting hole into which the cylindrical portion fits, There are three or more of the corresponding insertion holes and fastening holes. A pump mounting structure in which, of the three or more mutually corresponding insertion holes and fastening holes, the cylindrical portion and the fitting hole are provided in the two that maximize the area of a virtual triangle with the protruding portion and the two insertion holes as its vertices.
2. A mounting structure for attaching a pump housing to an object to be mounted, The aforementioned housing is An insertion hole through which the fastening member is inserted, The pump has a suction port for guiding liquid to the pump or a discharge port for guiding liquid discharged from the pump, and a protruding portion formed to protrude from it. The mounting body is A fastening hole formed in the housing corresponding to the insertion hole, through which the fastening member is fastened, The housing has an insertion hole into which the protruding portion is inserted, The aforementioned mounting structure is A cylindrical portion is provided that protrudes from one of the insertion hole and the fastening hole, through which the fastening member is inserted, The other of the insertion hole and the fastening hole is provided with a fitting hole into which the cylindrical portion fits, There are three or more of the corresponding insertion holes and fastening holes. A pump mounting structure in which the cylindrical portion and the fitting hole are provided among three or more mutually corresponding insertion holes and fastening holes such that the virtual triangle formed by the protruding portion and the two insertion holes is closest to an equilateral triangle.
3. A mounting structure for attaching a pump housing to an object to be mounted, The aforementioned housing is An insertion hole through which the fastening member is inserted, The pump has a suction port for guiding liquid to the pump or a discharge port for guiding liquid discharged from the pump, and a protruding portion formed to protrude from it. The mounting body is A fastening hole formed in the housing corresponding to the insertion hole, through which the fastening member is fastened, The housing has an insertion hole into which the protruding portion is inserted, The aforementioned mounting structure is A cylindrical portion is provided that protrudes from one of the insertion hole and the fastening hole, through which the fastening member is inserted, The other of the insertion hole and the fastening hole is provided with a fitting hole into which the cylindrical portion fits, There are three or more of the corresponding insertion holes and fastening holes. A pump mounting structure in which, of the three or more mutually corresponding insertion holes and fastening holes, the cylindrical portion and the fitting hole are provided in two locations that pass through the center of the pump's drive shaft and straddle a virtual line that divides the pump into a discharge side region and a suction side region.
4. A pump mounting structure according to claims 1 to 3, The cylindrical portion is a pump mounting structure which is press-fitted into a press-fit hole formed in one of the insertion hole and the fastening hole, having an inner diameter substantially the same as the inner diameter of the fitting hole.

Description

This invention relates to a pump mounting structure. Japanese Patent Publication No. 2021-4604 discloses a mounting structure for an electric pump device, comprising an electric pump device and a mounting body to which the electric pump device is attached. In this mounting structure, the positioning portion of the electric pump device engages with a positioning portion on the mounting surface of the mounting body, thereby ensuring the mounting accuracy of the electric pump device to the mounting body. In Japanese Patent Publication No. 2021-4604, the positioning part of the electric pump device is a pin that is fixed by press-fitting into a hole formed in the end face of the flange. Therefore, special machining is required for the hole into which the pin is press-fitted, increasing the number of machining steps. As a result, the manufacturing cost of the electric pump increases. The present invention aims to improve the mounting accuracy of a pump to an object at a low cost. According to one aspect of the present invention, there is a mounting structure for attaching a pump housing to a mounting body, wherein the housing has an insertion hole through which a fastening member is inserted, and a protruding portion formed to protrude from which a suction port for guiding liquid to the pump or a discharge port for guiding liquid discharged from the pump is provided, the mounting body has a fastening hole formed corresponding to the insertion hole of the housing and into which the fastening member is fastened, and an insertion hole into which the protruding portion of the housing is inserted, the mounting structure comprises a cylindrical portion provided to protrude from one of the insertion hole and the fastening hole and through which the fastening member is inserted, and a fitting hole provided on the other of the insertion hole and the fastening hole and into which the cylindrical portion is fitted, and there are three or more corresponding insertion holes and fastening holes, and of the three or more corresponding insertion holes and fastening holes, the cylindrical portion and fitting hole are provided in the two that have the largest area of a virtual triangle with the protruding portion and the two insertion holes as vertices . Furthermore, according to one aspect of the present invention, there is a mounting structure for attaching a pump housing to a mounting body, wherein the housing has an insertion hole through which a fastening member is inserted, and a protruding portion provided with a suction port for guiding liquid to the pump or a discharge port for guiding liquid discharged from the pump, and the mounting body has a fastening hole formed corresponding to the insertion hole of the housing and into which a fastening member is fastened, and an insertion hole into which the protruding portion of the housing is inserted, and the mounting structure has a cylindrical portion provided protruding from one of the insertion hole and the fastening hole through which a fastening member is inserted, and a fitting hole provided on the other of the insertion hole and the fastening hole into which the cylindrical portion is fitted, and there are three or more corresponding insertion holes and fastening holes, and of the three or more corresponding insertion holes and fastening holes, the cylindrical portion and fitting hole are provided in the two that make the virtual triangle with the protruding portion and the two insertion holes as vertices closest to an equilateral triangle. Furthermore, according to one aspect of the present invention, there is a mounting structure for attaching a pump housing to a mounting body, wherein the housing has an insertion hole through which a fastening member is inserted, and a protruding portion provided with a suction port for guiding liquid to the pump or a discharge port for guiding liquid discharged from the pump, and the mounting body has a fastening hole formed corresponding to the insertion hole of the housing and into which the fastening member is fastened, and an insertion hole into which the protruding portion of the housing is inserted, and the mounting structure has a cylindrical portion provided protruding from one of the insertion hole and the fastening hole through which the fastening member is inserted, and a fitting hole provided on the other of the insertion hole and the fastening hole into which the cylindrical portion is fitted, and there are three or more corresponding insertion holes and fastening holes, and of the three or more corresponding insertion holes and fastening holes, the cylindrical portion and fitting hole are provided on two of them that pass through the center of the pump drive shaft and straddle an imaginary line that divides the pump into a discharge side region and a suction side region. A side view of an electric pump and a mounting body according to an embodiment of the present invention, the mounting body is shown in cross-section.