Motor-driven compressor and method of assembling motor-driven compressor

Patent metadata

Field	Value
Publication number	US-11437882-B2
Application number	US-202016852975-A
Country	US
Kind code	B2
Filing date	Apr 20, 2020
Priority date	Apr 25, 2019
Publication date	Sep 6, 2022
Grant date	Sep 6, 2022

Abstract

The cluster block accommodates connection terminals and has conductive member insertion holes, into which the conductive members are inserted. The cluster block is disposed between the bottom wall of the housing and second coil ends. The conductive member insertion holes are located on the radially outer side of the inner circumferential surface of the stator core. The cluster block includes a second wall portion in the vicinity of the electric motor and a first wall in the vicinity of the bottom wall of the housing. The second wall portion has a pressed surface on the radially inner side of the inner circumferential surface of the stator core. The outer surface of the first wall portion has a contact surface that is lined up with the pressed surface in the axial direction of the stator core. The contact surface is allowed to contact the bottom wall of the housing.

First claim

What is claimed is:

1. A motor-driven compressor comprising:
a compression portion, which compresses fluid;
an electric motor, which drives the compression portion and includes a stator, the stator including a tubular stator core and a coil end, which protrudes from an end face in an axial direction of the stator core;

a housing including
a circumferential wall, which includes an inner circumferential surface to which the stator core is fixed, and
an end wall, which is continuous with an end in the axial direction of the circumferential wall and is lined up with the electric motor in the axial direction of the stator core;
a motor drive circuit, which drives the electric motor;
a conductive member, which is electrically connected to the motor drive circuit via a through-hole in the housing;
a motor wire, which is routed out of the coil end;
a connection terminal, which connects the conductive member and the motor wire to each other; and
a cluster block, which accommodates the connection terminal and includes a conductive member insertion hole, into which the conductive member is inserted, the cluster block being disposed between the end wall of the housing and the coil end in the axial direction of the stator core, wherein
when viewed in the axial direction of the stator core, the conductive member insertion hole is located on an outer side in a radial direction of the inner circumferential surface of the stator core,
the cluster block includes a motor-side end face in the vicinity of the electric motor,
the motor-side end face includes a pressed surface,
when viewed in the axial direction of the stator core, the pressed surface is located on an inner side in the radial direction of the inner circumferential surface of the stator core,
the cluster block includes a housing-side end face in the vicinity of the end wall of the housing,
the housing-side end face includes a contact surface, which is lined up with the pressed surface in the axial direction of the stator core, and
the contact surface is allowed to contact the end wall of the housing.

2. The motor-driven compressor according to claim 1 , wherein the cluster block includes an engaging portion, which is engaged with a jig configured to press the pressed surface.

3. The motor-driven compressor according to claim 2 , wherein the cluster block includes another engaging portion.

4. The motor-driven compressor according to claim 1 , wherein
the cluster block includes a protrusion,
the protrusion protrudes from a part of a side surface that connects the housing-side end face and the motor-side end face to each other, the part being located on an inner side in the radial direction of the inner circumferential surface of the stator core when viewed in the axial direction of the stator core, and
the protrusion has a hole, which extends through the protrusion in the axial direction of the stator core.

5. The motor-driven compressor according to claim 1 , wherein
the end wall of the housing includes a motor-side wall surface in the vicinity of the electric motor,
the motor-side wall surface includes a recess, which accommodates a part of the cluster block, and
the contact surface of the contact surface is allowed to contact a bottom surface of the recess.

6. A method of assembling a motor-driven compressor, wherein the motor-driven compressor includes a compression portion, which compresses fluid,
an electric motor, which drives the compression portion and includes a stator, the stator including a tubular stator core and a coil end, which protrudes from an end face in an axial direction of the stator core,
a housing including
a circumferential wall, which includes an inner circumferential surface to which the stator core is fixed, and
an end wall, which is continuous with an end in the axial direction of the circumferential wall and is lined up with the electric motor in the axial direction of the stator core,

a motor drive circuit, which drives the electric motor,
a conductive member, which is electrically connected to the motor drive circuit via a through-hole in the housing,
a motor wire, which is routed out of the coil end,
a connection terminal, which connects the conductive member and the motor wire to each other, and
a cluster block, which accommodates the connection terminal and includes a conductive member insertion hole, into which the conductive member is inserted, the cluster block being disposed between the end wall of the housing and the coil end in the axial direction of the stator core,
the method of assembling the motor-driven compressor comprising:
disposing the cluster block between the end wall of the housing and the coil end in the axial direction of the stator core such that, when viewed in the axial direction of the stator core, the conductive member insertion hole is located on an outer side in a radial direction of an inner circumferential surface of the stator core;
pressing a part of the cluster block that is on an inner side in the radial direction of the inner circumferential surface of the stator core when viewed in the axial direction of the stator core toward the end wall of the housing from inside the stator core using a jig, thereby holding the cluster block with the jig and the end wall of the housing in a state in which a part of the cluster block that is located in the vicinity of the end wall of the housing and is lined up with a part pressed by the jig in the axial direction of the stator core is caused to contact the end wall of the housing;
inserting the conductive member into the through-hole of the housing and the conductive member insertion hole of the cluster block in a state in which the cluster block is held with the jig and the end wall of the housing; and
connecting the conductive member and the connection terminal to each other.

Assignees

• Toyota Jidoshokki Kk

Inventors

• Takimoto Shuji
• Adaniya Taku
• Hamana Shozo

Classifications

• F04C23/02 Primary

  Pumps characterised by combination with, or adaptation to, specific driving engines or motors · CPC title

• H02K3/522

  for generally annular cores with salient poles · CPC title

• H02K7/14

  Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06) · CPC title

• H02K11/0094

  Structural association with other electrical or electronic devices · CPC title

• F05B2230/60

  Assembly methods · CPC title