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Electric pump apparatus

A technology of electric pumps and equipment, applied in the direction of mechanical equipment, pumps, pump components, etc., to achieve the effect of enhancing certainty

Inactive Publication Date: 2013-09-18
JTEKT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the electric pump equipment in which the control device is integrally formed as described above, a short circuit occurs in the electrical system electrically connecting the power supply device (battery) and the motor, or the electrical system is damaged due to rainwater or the like. Possibility of failure due to deterioration of parts (circuits, etc.)

Method used

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  • Electric pump apparatus
  • Electric pump apparatus
  • Electric pump apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0028] Such as figure 1 As shown, the electric pump device 1 includes a casing 2 formed in an approximately cylindrical shape. A pump 3 that generates oil pressure, a motor 4 that drives the pump 3 , and a control device 5 that controls the operation of the motor 4 are housed integrally in the housing 2 . In the following description, one axial end side of housing 2 ( figure 1 The left side in) is called the front side, and the other axial end side ( figure 1 The right side in ) is called the rear side.

[0029] The casing 2 includes: an approximately annular pump casing 11; a pump plate 12 placed in front of the pump casing 11; a cylindrical motor casing 13 placed behind the pump casing 11; Cover 14. The pump housing 11 and the pump plate 12 are made of a metal material, and the motor housing 13 and the cover 14 are made of a resin material. The pump housing 11 , the pump plate 12 , and the motor housing 13 are coupled to each other by screws 15 , and the cover 14 is fix...

Embodiment approach 2

[0061] Figure 4 An electric pump device according to Embodiment 2 is shown. Embodiment 2 is constituted similarly to Embodiment 1 except for the manner of attachment of the control device 5 , and thus a detailed description of this part is omitted.

[0062]In Embodiment 2, the attachment portion is formed such that the circuit board 51 is in the horizontal direction in a state where the electric pump device 1 is attached to the vehicle body. The circuit board 51 is fixed to the motor housing 13 and the pump housing 11 by screws 54 . The control IC chip 53 is mounted on one surface of the circuit board 51, the power IC chip 52 is mounted on the other surface, and the control IC chip 53 is placed higher than the power IC chip 52 in the direction of gravity. In this embodiment, the positions where the terminals protrude from the power IC chip 52 are located at the lowest water level Hmin. The cover 14 is fixed to the base portion 42 of the motor housing 13 by other bolts 60 a...

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Abstract

To provide an electric pump apparatus in which it is possible to avoid an instance in which a fault detection circuit stops operating before a fault in an electrical system is detected, and in which it is possible to enhance the reliability of fault detection. A mounting unit (63) on a vehicle main body (61) is formed such that a circuit board (51) of a control device (5) is orthogonal to the horizontal direction in a state in which an electric pump device (1) is mounted to the vehicle main body (61). A control IC chip (53) constituting a microcomputer (72) for detecting a fault in an electrical system is arranged on the circuit board (51) so as to be higher with respect to the direction of gravity than a minimum water level Hmin at which water ingress into a housing (2) causes a short circuit in the electrical system.

Description

technical field [0001] The invention relates to an electric pump device to be mounted on a vehicle. Background technique [0002] In a vehicle equipped with a so-called idle stop function, which automatically stops the engine when the vehicle temporarily stops, the supply of oil pressure to the transmission etc. is generally ensured by using an electric pump device even in the case of an idle stop . Such an electric pump device is installed in a limited space of a vehicle. Therefore, miniaturization of electric pump equipment is strongly demanded. Therefore, an electric pump apparatus has generally been proposed in which a pump generating oil pressure, a motor driving the pump, and a control device controlling the operation of the motor are accommodated in a common housing to be integrated with each other, thereby making the electric pump apparatus Miniaturization (for example, see Patent Document 1). [0003] For example, in a case where the vehicle runs along a road co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04B53/00F04C14/28
CPCF01C21/007F04B17/03F04B49/06F04B51/00F04B53/16F04C2/10F04C14/28F04C15/008F04C2240/51F04C2240/808F04C2270/10F04C2270/60F04C2270/86
Inventor 日比勉今井深见
Owner JTEKT CORP