JP2006042409A - Motor integrated compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem of a conventional motor integrated compressor that an input terminal to take external power into a motor causes an increase in the radial length and the axial length of a motor, in its turn, a housing to accommodate the motor and the compressor. <P>SOLUTION: The motor integrated compressor comprises the housing 10 where internal space is sealed, the compressor 30 which is arranged in the housing, a rotor 42 which is juxtaposed, within the housing, with the compressor, and the motor 35 which is juxtaposed, within the housing, with the compressor, and includes a stator 36 and the input terminal 45 so as to drive the compressor. Here, the input terminal 45 includes a cluster 46 which is arranged at the peripheral face of the stator and extends in tangent direction and is equipped with a female terminal 55, and a hermetic terminal 60 which is equipped with a male terminal 63 conducted with the female terminal. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a motor-integrated compressor used in a vehicle or the like in which a compressor and a motor are integrated, and particularly to an improvement of an input terminal thereof.

  In a vehicle, an air conditioning compressor and a motor for driving the air conditioning compressor may be integrated due to demands for downsizing and the like. Specifically, the compressor and the motor are arranged side by side in a common (one) housing. In general, an AC motor including a rotor including a permanent magnet and a stator including a core and a coil is used as the motor, and the direct current of the in-vehicle battery is converted into alternating current by an inverter and then supplied to the stator coil via the input terminal. The

  As shown in FIG. 7, in the first conventional motor-integrated compressor (see Patent Document 1), a compressor 154 and a motor 156 are coaxially arranged in a housing 150 and arranged side by side. Specifically, the compressor 154 is accommodated in the first portion 151 of the housing 150, the motor 156 is accommodated in the second portion 152, and the inverter 158 is attached above the first portion 151. The hermetic terminal 160 passes through the first portion 151 of the housing 150 in the radial direction, and has one end connected to the inverter 158 and the other end connected to the stator coil 157 of the motor 156.

On the other hand, in the motor-integrated compressor of the second conventional example (see Patent Document 2), as shown in FIG. 8, a compressor 167 and a motor 169 are coaxially arranged in a housing 165 and aligned in the vertical direction. Yes. The inverter (not shown) and the stator coil 171 of the motor 169 are connected to each other by a connection line 173 that extends in the housing 165 in the axial direction.
JP 2003-214340 A JP 2000-232746 A

  Any of the above conventional examples has room for improvement in terms of downsizing the motor-integrated compressor. Vehicle air-conditioning compressors have limited mounting space and are required to be as compact as possible. Specifically, it is desired that the external dimensions (axial length, radial length) are short. However, in the first conventional example, since the hermetic terminal 160 penetrates the first portion 151 of the housing 150 in the radial direction, the dimension in the diameter direction of the housing 150 is increased accordingly. On the other hand, in the second conventional example, since the connecting wire 173 extends in the axial direction from the stator coil 171 of the motor 169, the axial dimension of the housing 165 is increased correspondingly.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a motor-integrated compressor in which an increase in radial length and axial length due to the arrangement of input terminals is suppressed as much as possible.

  The inventor of the present application has come up with the idea that the input terminal has a thin plate shape as a whole and is arranged in the tangential direction on the outer peripheral surface of the motor, thereby completing the present invention.

  According to a first aspect of the present invention, there is provided a motor-integrated compressor, comprising: a housing having a sealed internal space; a compressor disposed in the housing; and a rotor, a stator, and an input terminal that are juxtaposed with the compressor in the housing. And a motor for driving the compressor. Here, the input terminal was composed of a cluster provided on the outer peripheral surface of the stator and extending in the tangential direction and provided with a female terminal, and a hermetic terminal provided with a male terminal connected to the female terminal.

  In this motor-integrated compressor, when the male terminal of the hermetic terminal of the input terminal is inserted into the cluster housing of the cluster and conducted to the female terminal, external power is supplied to the motor via the input terminal, and the rotating motor drives the compressor To do.

  According to the motor-integrated compressor according to the present invention, the input terminal for supplying external power to the motor is disposed on the outer peripheral surface of the stator of the motor and extends in the tangential direction. There is little increase. That is, the input terminal could be arranged without increasing the outer dimension of the housing.

  According to the motor-integrated compressor of the second aspect, since the cluster housing of the input terminal has a thin plate shape and extends in the axial direction of the motor, an increase in the radial dimension of the housing can be further reduced. According to the motor-integrated compressor of claim 3, since the cluster housing is arranged on the side in the circumferential direction of the motor and is opened in the axial direction or the direction perpendicular to the axis, the connection between the input terminal and the hermetic terminal is easy. It is. According to the motor-integrated compressor of the fourth and fifth aspects, the configuration of the female terminal of the cluster and the male terminal of the hermetic terminal can be selected in consideration of the relationship with the peripheral members.

  The motor-integrated compressor of the present invention includes a housing, a compressor, and a motor. The “integrated” of the compressor and the motor means a type in which the compressor and the motor are coaxially arranged in a common housing and the compressor is directly driven by the driving force of the motor.

<Housing>
The housing has a shape suitable for accommodating the compressor and the motor, and the internal space is sealed (airtight). The reason why the airtightness is required is that the refrigerant is compressed by the compressor, and after being discharged from the compressor, the refrigerant flows through the inside for cooling the motor. For example, a housing can be comprised by the bottomed cylindrical main body, the sealing material which covers the opening, and a cover member. The main body portion includes a cylindrical first accommodating portion that accommodates the compressor, and a cylindrical second accommodating portion that accommodates the motor. The diameters and the axial lengths of the first and second accommodating portions can be selected as appropriate.

<Compressor>
The compressor constitutes a part of a refrigeration cycle such as an air conditioning system of a vehicle, and discharges after compressing a gas refrigerant. A general-purpose compressor can be used in the motor-integrated compressor.

<Motor, input terminal>
(A) An AC motor is generally used as the motor, is driven by an AC voltage obtained by converting a DC voltage of the on-vehicle battery by an inverter, and includes a stator, a rotor, and an output terminal. The stator includes a stator core fixed to the housing and a stator coil wound around the stator core. The rotor is attached to a rotating shaft that is rotatably supported by the housing. The motor can be used in a state where the rotation axis is horizontal or vertical.

  (B) The input terminal is arranged between the inverter and the motor, and supplies an alternating voltage to the stator coil to form a rotating magnetic field. The input terminal is roughly divided into a thin plate-shaped cluster and a pin-shaped hermetic terminal. . According to the invention, it is arranged tangentially on the outer peripheral surface of the motor.

a. The cluster is disposed at a predetermined position on the circumferential surface of the stator and extends in the tangential direction, and includes an insulating cluster housing and a conductive female terminal. The predetermined position is, for example, a side portion, an upper portion, or a lower portion. The cluster housing has a hollow thin plate shape and is open at both ends (see claim 2). One end opening serves as an insertion port for a hermetic pin, and the other end opening serves as a lead-out port for a lead wire connecting the female terminal and the stator coil. For example, when the input terminal is attached to the side portion of the stator core, the one-end opening may face upward or sideward.

  The female terminal mounted in the cluster housing has an annular shape or a cylindrical shape, and its hollow hole extends in the same direction as the opening direction of the cluster housing. When there are a plurality of female terminals, the hermetic terminals can be arranged at positions aligned with or shifted from the insertion direction of the male terminals (see claim 4).

b. Hermetic terminal The conductive hermetic terminal includes at least two pins (male terminals) inserted into the cluster housing and conducted to the female terminals, which is sufficient for a single-phase AC motor. In the case of a three-phase AC motor, three pins are required, and these are integrated in parallel by the main body. When there are a plurality of male terminals, they can have the same length or different lengths (see claim 5). The insertion direction of the male terminal varies depending on the arrangement location of the cluster and the opening direction of the cluster. However, since the cluster is arranged in the tangential direction of the stator, the tangential direction is the axial direction of the stator or the axis perpendicular direction. 3).

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

<Example>
(Constitution)
1, FIG. 2, FIG. 3 and FIG. 4 show a motor-integrated compressor of a first embodiment. This motor-integrated compressor includes a housing 10 and a pump (compressor) 30 and an AC motor 35 accommodated in the housing 10 side by side.

  A cylindrical housing 10 with both ends closed includes a bottomed cylindrical main body 11, a lid member 21 covering the opening, and a gasket 29 positioned between the main body 11 and the lid member 21. It is arranged in the horizontal direction (horizontal direction). The main body 11 has a relatively large-diameter cylindrical first accommodating portion 12 on one end side (right end side in FIG. 1), a relatively small-diameter cylindrical second accommodating portion 14 on the other end side (left end side), and one end. A wall 16 is included. The opening of the first housing portion 12 is covered with the lid member 21 via the gasket 29, and the internal space of the housing 10 is sealed.

  As can be seen from FIG. 2, a flat mounting surface 23 is formed on the upper surface of the second housing portion 14, and an inverter (not shown) is mounted thereon. Further, a rectangular protruding portion 25 is formed that slightly protrudes radially outward within a certain range in the vertical (height) direction and the horizontal (lateral) direction of the side portion of the second storage portion 14.

  Returning to FIG. 1, the compressor 30 accommodated in the 1st accommodating part 12 compresses and discharges a refrigerant | coolant. Therefore, the fixed scroll (not shown) fixed to the 1st accommodating part 12 and the rotor (not shown) revolving around the rotating shaft 40 with rotation of the rotating shaft 40 mentioned later are included, and a fixed scroll and a rotor are included. A small space is formed between the two. The volume of the small space is changed by the revolution of the rotor, and the refrigerant filled in the space is compressed. The refrigerant is then discharged from a discharge valve (not shown), circulates through the refrigeration cycle, is sucked from the suction port formed at the right end of the housing 10, flows through the space in the AC motor 35, and then returns to the compressor.

  The AC motor 35 housed in the second housing portion 14 includes a stator 36, a rotor 42, and an input terminal 45. The stator 36 includes an annular stator core 37 fixed to the inner peripheral surface of the second housing portion 14, and a stator coil 38 wound around the stator core 37. A rotor 42 made of a permanent magnet is attached to a rotating shaft 40 supported by a pair of bearings 41 (only the right side is shown and the left side is not shown), and faces the stator 36.

  Next, the input terminal 45 including the cluster 46 and the hermetic terminal 60 will be described in detail with reference to FIGS. 3 and 4 (the housing is not shown). The cluster 46 has a cluster housing 47 and three female terminals 55 mounted therein. The cluster housing 47 has a hollow thin plate shape as a whole, and a pair of rectangular side walls 48a and 48b opposed to each other at a predetermined interval and a pair of rectangular end walls (non-flat) extending in the vertical direction connecting the side edges of both side walls. The upper and lower ends are open. A lower portion of one end wall is cut out for drawing out the lead wire 58.

  A dovetail protrusion 51 having a trapezoidal cross section and extending in the left-right (axial) direction is formed on the outer surface of one side wall 48 a and is engaged with a dovetail groove 39 having a trapezoidal cross section formed in the axial direction on the outer peripheral surface of the stator core 37. Yes. Thereby, the cluster housing 47 is disposed in a tangential direction at a predetermined position on the outer peripheral surface of the stator core 37, and extends in the axial direction and the axis perpendicular direction of the stator core 37. Hollow holes of three annular female terminals 55 arranged side by side in the cluster housing 47 extend in the vertical direction. A lead wire 58 extending from the other end of the female terminal 55 is connected to the stator coil 38, and a curved portion 58 a serving as a cushion is formed in the middle of the lead wire 58.

  The hermetic terminal 60 includes an elongated rod-shaped main body 61 and three pins (male terminals) 63 extending in a direction orthogonal to the main body 61 and parallel to each other. The interval between the male terminals 61 is equal to the interval between the female terminals 55, and the male terminals 61 can be inserted downward into the female terminals 55. The upper end of the male terminal 61 is connected to the inverter.

(Function and effect)
Since the operation of the motor-integrated compressor is known per se and is not directly related to the present invention, the description thereof is omitted. When the hermetic terminal 60 is inserted into the cluster 46, as shown in FIG. 4, the male terminal 63 is inserted downward to conduct to the female terminal 55.

  According to this motor-integrated compressor, first, an increase in the dimension in the diameter direction of the second accommodating portion 14 of the housing 10 due to the arrangement of the input terminal 45 can be minimized. In other words, the input terminal 45 hardly increases the outer dimension of the second housing portion 14. As apparent from FIGS. 1 and 2, the thickness of the input terminal 45 (the vertical dimension in FIG. 1 and the horizontal dimension in FIG. 2) is much smaller than the horizontal dimension of the stator core 37. Further, the height (the vertical dimension in FIG. 2) of the input terminal 45 is smaller than the vertical dimension of the stator core 37. This is because the cluster 46 as a whole has a thin plate rectangular shape and is arranged in the tangential direction on the outer peripheral surface of the stator core 37.

  Secondly, since the input terminal 45 is arranged on the side portion (right side in FIG. 2) on the outer peripheral surface of the stator core 37, the hermetic terminal 60 can be inserted vertically in the tangential direction, and the insertion is easy. Further, a curved portion 58a as a cushion is provided in the middle of the lead wire 58 connecting the female terminal 55 of the cluster 46 and the stator coil 38, and the cluster 46 is provided on the dovetail 49 of the cluster housing 4 and the stator core 37. It is attached to the stator core 37 by engaging with a dovetail groove 39 that is larger in shape than the protrusion 49. As a result, even if the misalignment occurs in the axial direction of the stator core 37 when the hermetic terminal 60 is inserted, the cluster housing 47 can be easily moved and can be easily inserted.

  Even if the tangential displacement of the stator core 37 occurs, the dovetail protrusion 49 can move in the tangential direction in the dovetail groove 39, so that the hermetic terminal can be easily inserted. Furthermore, the stress at the joint between the lead wire 58 and the stator coil 38 can be relaxed.

<Modification>
5 and 6 show a modification of the above embodiment. These modified examples differ from the embodiments in specific configurations of clusters and hermetic terminals.

(1) First Modification In the first modification shown in FIG. 5, the cluster housing 102 of the cluster 100 is disposed laterally in the tangential direction on the side of the outer peripheral surface of the stator core 37, and the left end and the right end are open. The hollow holes of three (only one shown) annular female terminals 104 extend in the left-right direction. The lead wire 106 extends from the left end opening and includes a curved portion 107 in the middle thereof. On the other hand, the hermetic terminal 110 has the same configuration as that of the above embodiment, and includes a main body 111 and three male terminals 112. Other configurations are the same as those in the embodiment.

  In this first modification, when the hermetic terminal 110 is inserted into the cluster 100, the male terminal 112 is inserted into the female terminal 104 in the axial direction from one end surface side of the stator core 37. According to the first modified example, in addition to the effects of the above-described embodiment, a space for bending the lead lead from the female terminal by 90 ° is not necessary, and therefore, a unique effect that the housing accommodating portion can be further reduced. Is obtained.

(2) Second Modification In the second modification shown in FIG. 6, the cluster housing 122 of the cluster 120 fixed in the tangential direction to the side portion of the outer peripheral surface of the stator core 37 includes two step portions 123 on the upper surface. Three female terminals (only one is shown) 125 are arranged at positions shifted from the insertion direction of the hermetic terminal 130 (vertical direction in FIG. 6). The first female terminal 125 at the right end in the axial direction is arranged at the lowest position in the vertical direction, the third female terminal at the left end (not shown) is arranged at the highest position, and the second female terminal (not shown) at the middle is arranged in the middle. . Lead wires 128 connected to the three female terminals 125 and the like extend in the axial direction of the stator core 37 (leftward in FIG. 6).

  The three male terminals 133, 134, and 135 integrated with the main body 132 of the hermetic terminal 130 have different lengths corresponding to the positions of the female terminals 125, and the first male terminal 133 at the right end is The longest third male terminal 135 at the left end is the shortest, and the middle second male terminal 134 has a length between them.

  In this second modification, when inserting the male terminals 133 to 135 of the hermetic terminal 130 into the female terminals 125 of the cluster 120, they are inserted from the top to the bottom in the tangential direction of the stator core 37. According to this second modification, the same effect as in the first embodiment can be obtained.

It is a horizontal sectional view showing an example of the present invention. It is AA sectional drawing of FIG. It is a principal part enlarged view of FIG. It is a side view (however, a housing is omitted) of the above embodiment. It is a side view corresponding to FIG. 4 which shows the 1st modification of the said Example. It is a side view corresponding to FIG. 4 which shows the 2nd modification of the said Example. It is front sectional drawing which shows a 1st prior art example. It is front sectional drawing which shows a 2nd prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10: Housing 12: 1st accommodating part 14: 2nd accommodating part 30: Compressor 35: AC motor 36: Stator 37: Stator core 42: Rotor 45: Input terminal 46: Cluster 47: Cluster housing 55: Female terminal 60: Hermetic terminal 63: Male terminal

Claims (5)

A motor-integrated compressor comprising: a housing in which an internal space is sealed; a compressor disposed in the housing; and a motor that is disposed in parallel with the compressor in the housing and includes a rotor, a stator, and an input terminal and drives the compressor. In
The motor is characterized in that the input terminal includes a cluster having a female terminal disposed on an outer peripheral surface of the stator and extending in a tangential direction, and a hermetic terminal having a male terminal electrically connected to the female terminal. Body type compressor.   The cluster includes a hollow thin plate-shaped cluster housing that is insulative and has a predetermined length in the axial direction of the stator, and a plurality of annular or cylindrical female terminals mounted inside the cluster housing. The motor-integrated compressor according to 1.   The motor-integrated compressor according to claim 2, wherein the cluster housing is attached to a side portion in a circumferential direction of the stator and opens in an axial direction or a direction perpendicular to the axial direction of the stator.   4. The motor-integrated compressor according to claim 3, wherein the plurality of female terminals are arranged at positions aligned with or shifted from the insertion direction of the male terminals. 5. 5. The motor-integrated compressor according to claim 4, wherein the plurality of male terminals of the hermetic terminal have the same or different lengths and are inserted in the opening direction of the cluster housing.

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