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Oil pump mounting structure

An installation structure, oil pump technology, applied to pump components, rotary piston/swing piston pump components, machines/engines, etc., can solve problems such as noise and efficiency reduction, oil film rupture of seals, and reduction of oil pump operating efficiency, etc. To achieve the effect of preventing efficiency reduction and preventing abnormal noise

Active Publication Date: 2015-01-14
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the technique described in Patent Document 1, when the chamber of the oil pump moves from the discharge port to the suction port, the pressure generated when the chamber starts to increase in theoretical volume in an isolated state immediately before opening through the suction port Considering the reduction of the oil film rupture that occurs on the radially outer side of the sealing part
[0007] Therefore, depending on the operating conditions of the oil pump and the setting of the clearances between the various parts of the oil pump, oil film rupture may occur on the radially outer side of the seal portion, resulting in noise and reduced efficiency.
[0008] In the technique described in Patent Document 2, the radially outer side of the sealing portion is displaced from the position in the radial direction of the oil passage having a substantially isosceles triangular cross-section, so it is considered that it is difficult to prevent the radial direction of the sealing portion from oil film rupture
In addition, such an oil passage always communicates with each other with different pressure chambers formed in the circumferential direction of the oil pump, so there is a disadvantage that the operating efficiency of the oil pump is reduced.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] figure 1 It is an exploded perspective view showing an oil pump as a whole, including a cover, a rotor, a base plate, etc., based on the installation structure of the oil pump according to the first embodiment of the present invention, figure 2 is viewed from the opposite side figure 1 An exploded perspective view of the oil pump shown, image 3 is assembled figure 1 The top view of the oil pump shown in Fig. Figure 4 It is a plan view of the inner face side of the cover, Figure 5 is the top view of the bottom plate, Figure 6 is a perspective view of an oil pump, Figure 7 is viewed from the opposite side Figure 6 The perspective view of the oil pump shown, Figure 8 It is an explanatory cross-sectional view schematically showing the mounting structure of the oil pump of the first embodiment.

[0049] exist figure 1 The middle symbol 10 represents an oil pump (hydraulic pump). The oil pump 10 is constituted by an internal gear pump, and is housed in a tra...

Embodiment 2

[0071] Figure 9 shows the installation structure of the oil pump of the second embodiment of the present invention, and Figure 8 A cross-sectional view of a similar screw fastening portion.

[0072] In addition to the first, second, and third screw fastening portions 50, 62, and 60 described in the first embodiment, the second embodiment is configured such that the remaining screw fastening portions 52, 54, and 56 are used as the first screw fastening portions. 4 In the case of the threaded fastening part, the first, second and third external threads 50a, 62a, 60a that should be screwed into the first, second, and third thread fastening parts 50, 62, 60 should be screwed together. All of the second and third internal threads 50b, 62b, and 60b are formed on one of the cover member 26 and the transmission case 12, more specifically, the transmission case 12, and should be used to form the fourth screw fastening portion 52, The fourth internal threads 52b, 54b, 56b, which are...

Embodiment 3

[0082] Figure 11 shows the installation structure of the oil pump of the third embodiment of the present invention, and Figure 8 A cross-sectional view of a similar screw fastening portion.

[0083] In addition to the first, second, and third screw fastening parts 50, 62, and 60 described in the first embodiment, the third embodiment is constituted such that the rest of the screw fastening parts are connected in the same manner as the second embodiment. When 52, 54, and 56 are used as the fourth thread fastening portion, the first, second, and third external threads 50a, 62a, 50a, 62a, The first, second, and third internal threads 50b, 62b, and 60b screwed by 60a are all formed on one of the cover member 26 and the transmission case 12, more specifically, the transmission case 12, and will correspond to the configuration of the fourth The fourth internal threads 52b, 54b, 56b to which the fourth external threads 52a, 54a, 56a of the screw fastening parts 52, 54, 56 are scr...

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Abstract

The invention provides an oil pump mounting structure, wherein the sealing part of an oil pump is formed between a discharge port and a suction port arranged along the circumferential direction of a rotor, and the rupture of an oil membrane at the radial outer side of the sealing part is prevented. The oil pump comprises a sealing part formed between the discharge port and the suction port arranged along the circumferential direction of the rotor, wherein the rotor is received in a space (28) between a housing (20) and a cover member (26); and first, second and third threaded fastening parts (50, 62, 60) arranged at the periphery of the housing and the cover member. The cover member is adopted as the mounting surface of the oil pump, so that the oil pump is freely arranged at a mounting part (12). In the oil pump mounting structure, the first outer thread (50a) passing through the first threaded fastening part is threaded with a first inner thread (50b) to be formed on the cover member, while the second and third outer threads (62a, 60a) passing through the second and third threaded fastening parts are threaded with second and third inner thread (62b, 60b) to be formed on the mounting part.

Description

technical field [0001] The present invention relates to a mounting structure of an inline type oil pump (hydraulic pump) having a rotor composed of an inner rotor and an outer rotor. Background technique [0002] As a technique close to the present invention, the technique described in Patent Document 1 is currently known. The technical configuration described in Patent Document 1 is such that a recessed portion is provided in a seal portion (spacer portion) formed between the suction port and the discharge port of the oil pump so as to be spaced from the port, and a dedendum portion formed between the dedendum portion of the inner rotor and the outer rotor When the chamber (pump chamber) between the tooth tips goes from the discharge port to the suction port, it prevents the generation of local high pressure due to the volume reduction of the chamber but cannot be discharged, and reduces vibration and noise. [0003] In addition, the technique described in Patent Document ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04C15/00
Inventor 金原茂吉成大二郎
Owner HONDA MOTOR CO LTD