JP2012188968A - Vane pump - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vane pump that achieves a reduction in the number of components in a vane pump driven by a brushless motor.SOLUTION: The vane pump 10 is provided coaxially with a shaft 27 of a brushless motor 28 so as to be driven by the brushless motor 28. The vane pump includes: a pump body 40 that has an inlet port 24 and an exhaust port 130 (an exhaust outlet 130) between a vane chamber (Fig.2, a code 81) for compressing air and a rotor 28e of the brushless motor 28 and is fitted with a bearing 102 which rotatably and pivotally supports the rotor 28e; a control circuit 25 provided in the pump body 40 in order to control the brushless motor 28; and a yoke 28a of the brushless motor 28 that has a form integral with the pump body 40. It allows the vane pump driven by the brushless motor to achieve a reduction in the number of components.

Description

  The present invention relates to a vane pump, for example, a vane pump used for generating a negative pressure of a negative pressure booster for a vehicle.

  As this type of vane pump, an electric air pump for automobiles has been proposed (see, for example, Patent Document 1 (FIG. 2)).

  The vane pump shown in FIG. 2 of Patent Document 1 includes a pump body (101) (the numbers in parentheses indicate the reference numerals described in Patent Document 1. The same applies hereinafter) and a brushless motor (119) are provided coaxially. ing. A suction port (113) and a discharge port (114) are formed on the side surface of the front plate (111).

By the way, a brushless motor requires a control circuit, and Patent Document 2 discloses a brushless motor in which a control circuit is arranged.
The technique of this patent document 2 is demonstrated below based on drawing.
FIG. 14 is a cross-sectional view of a brushless motor provided in a conventional vane pump. The vane pump 200 includes a vane pump main body 201 and a brushless motor 202. Yes.

  The brushless motor 202 includes a bearing 204 provided on the case member 203, a rotating shaft 205 provided rotatably on the bearing 204, and a rotor 206 provided so as to rotate integrally with the rotating shaft 205. A control circuit 207 provided on the opening side of the case member 203 and a stator coil 208 connected to the control circuit 207 are provided.

The case member 203 is fixed to the mounting member 209 by spot welding, and a nugget 210 is formed. For example, the vane pump 200 is assembled by fastening the attachment member 209 to the flange portion 211 of the vane pump main body 201 with the bolt 212. Further, in the case of coupling by the flange portion 211, the packing 213 is usually required. That is, the vane pump 200 includes a vane pump main body 201, a brushless motor 202, a plurality of bolts 212, and a packing 213, and has a large number of parts.
The outer diameter D1 of the flange portion 211 is larger than the outer diameter of the pump body 201.

International Publication No. 2004/029462 Pamphlet JP 2007-185040 A

  An object of the present invention is to provide a pump capable of reducing the number of parts in a vane pump driven by a brushless motor.

  The invention according to claim 1 is a vane pump that is provided coaxially with the shaft of the brushless motor and is driven by the brushless motor, and includes a suction port and an exhaust between a vane chamber that compresses air and the rotor of the brushless motor. A pump body having at least one of the ports and fitted with a bearing that pivotally supports the rotor, a control circuit provided in the pump body for controlling the brushless motor, and an integral part of the pump body And a yoke of the brushless motor having the above-described form.

  In the invention according to claim 2, the yoke is characterized in that the periphery of the yoke is caulked and joined to the pump body.

  In the invention according to claim 3, the pump body is characterized in that a control circuit is fixed to the pump body by a fastener at a portion facing the brushless motor.

  The invention according to claim 4 is characterized in that a concave portion for accommodating the control circuit is provided in a portion facing the brushless motor, and the control circuit is accommodated in the concave portion.

  In the invention according to claim 1, the yoke of the brushless motor is integrated with the pump body. Bolts and packing can be omitted by integration. As a result, a vane pump driven by a brushless motor can provide a pump capable of reducing the number of parts.

In the invention according to claim 2, the yoke includes the pump body and the peripheral edge portion of the yoke that is coupled by caulking all around. Since the entire periphery of the yoke is crimped to the pump body, the number of parts such as screws for fixing the yoke can be reduced.
In addition, since the periphery of the yoke is caulked and joined to the pump body, sealing performance can be achieved without using a seal member such as packing, and the number of parts can be further reduced.
Furthermore, since it is caulking all around, the flange portion is not required, the outer diameter can be reduced, and the vane pump can be downsized.

  In the invention which concerns on Claim 3, the control circuit is being fixed to the pump body by the fastener at the site | part which faces a brushless motor in the pump body. Since the control circuit is fixed to the pump body with a fastener and the control circuit is covered with the brushless motor, the control circuit can be effectively protected without providing a dedicated cover.

  In the invention which concerns on Claim 4, a recessed part is provided in a pump body, a control circuit is accommodated in this recessed part, and this control circuit is being fixed to the pump body with the fastener. Since the control circuit is housed in the recess, the control circuit can be more effectively protected. Moreover, since the space in the recess is used, the control circuit can be efficiently accommodated.

It is a figure which shows the example of arrangement | positioning of the vane pump which concerns on this invention. It is a disassembled perspective view of a pump part. It is a disassembled perspective view of a vane pump. It is a figure explaining the assembly | attachment procedure of a control circuit and a brushless motor. It is sectional drawing of the vane pump of Example 1. FIG. FIG. 6 is a sectional view taken along line 6-6 of FIG. FIG. 7 is a cross-sectional view taken along line 7-7 in FIG. 5. FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 5. It is a figure explaining the flow of the intake air from a connection pipe to a pump part. It is a figure explaining the flow of the exhaust_gas | exhaustion from a pump part to an exhaust port. It is a figure which shows the example of a change of FIG. It is sectional drawing of the vane pump of Example 2. FIG. It is sectional drawing of the vane pump of Example 3. FIG. It is a principle diagram of a conventional vane pump.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.

First, Embodiment 1 of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the vane pump 10 of the present invention is a kind of vacuum pump that makes negative pressure in a negative pressure chamber 12 of a negative pressure booster 11 provided in a vehicle.
When the vane pump 10 is operated, the negative pressure pipe 13, the negative pressure chamber 12, and the variable pressure chamber 14 are at negative pressure. When the brake pedal 16 is depressed in this state, the negative pressure chamber 12 and the variable pressure chamber 14 are cut off, air is introduced into the variable pressure chamber 14, and the diaphragm 17 is returned to the return spring by the differential pressure between the negative pressure chamber 12 and the variable pressure chamber 14. 18 is deformed to the compression side and push rod 19 is pushed out. As a result, a large braking force can be obtained with a small pedal effort. The vane pump 10 is fixed to the bracket 21 on the vehicle side with bolts 22.

Next, the pump part of the vane pump 10 will be described in detail below.
2 is an exploded perspective view of the pump unit 80. The pump unit 80 includes a non-circular cross-section vane chamber 81, a case 83 provided with a plurality of (four in this example) bolt holes 82, and a plurality of vane grooves 85. Are provided radially, and an involute spline hole 86 is provided at the center. The rotor 87 is rotatably accommodated in a vane chamber 81 having a non-circular cross section, and the vane 88 is accommodated in a plurality of vane grooves 85 movably. , An intake plate 94 having a plurality (four in this example) of bolt holes 91 and two upper and lower intake holes 92, 93, and a plurality (four in this example) of bolt holes 96 and two upper and lower exhaust holes 97. , 98 and a plurality (four in this example) of bolts 32 passed through the bolt holes 96, 82, 91.

The structure of the vane pump 10 will be described in detail below.
As shown in FIG. 3, the vane pump 10 includes a pump body 40 having a suction port 24 at the top, and a plurality of (two in this example) screws 26 attached to one side of the pump body 40. A control circuit 25 to be controlled, a brushless motor 28 which is coupled to a motor mounting portion 29 of the pump body 40 outside the control circuit 25 and whose motor shaft 27 is an involute spline shaft, and the other side surface of the pump body 40 are provided. A pump portion 80 which is attached by screwing a long bolt 32 into a plurality of (four in this example) female screw holes 31, a connection pipe 60 which is connected to the suction port 24 via a filter member 33, and a pump portion. 80 and a plurality (four in this example) of female screw holes 34 provided on the other surface of the pump body 40. A cover body 70. attached by screwing the scan 36.

A harness 35 for supplying power to the brushless motor 28 is provided on the side of the pump body 40.
Since the pump body 40 is a base for mounting the brushless motor 28 and connecting to the vehicle, it is desirable that the pump body 40 is made of a thick and rigid metal such as a casting. On the bottom surface of the pump body 40, a pair of fixing portions 41 attached to a vehicle-side bracket (FIG. 1, reference numeral 21) via bushes are provided so as to protrude downward. A shaft hole 42 into which the motor shaft 27 is inserted is provided at the center of the pump body 40.

  A side surface of the pump body 40 to which the pump unit 80 is attached is referred to as a pump attachment side surface 43. A seal material 44 such as an O-ring is provided on the pump mounting side surface 43 along the outer periphery of the pump mounting side surface 43.

  A semicircular intake groove 46 centered on the shaft hole 42 is provided on the pump mounting side surface 43 from the upper side to the lower side of the shaft hole 42, and a sealing material such as an O-ring surrounds the intake groove 46. 47 is provided on the pump mounting side surface 43.

  Furthermore, a plurality of (four chambers in the embodiment) chambers 51 to 54 are provided on the pump mounting side surface 43. The plurality of chambers 51 to 54 are disposed at the center in the vertical direction of the body portion 40, and are disposed between the first chamber 51 formed along the outer periphery of the body portion 40 and the first chamber 51 and the shaft hole 42. A second chamber 52 communicating with the first chamber 51 via the first communication groove 55, and a third chamber disposed below the shaft hole 42 and communicating with the second chamber 52 via the second communication groove 56. 53 and a fourth chamber 54 formed along the outer periphery of the body portion 40 immediately below the third chamber 53 and independent of the chambers 51 to 53.

  The connecting pipe 60 includes a fastening portion 63 that is fastened by screwing screws 62 into a plurality of (two in this example) female screw holes 61 provided on the upper surface of the body portion 40, and projects upward from the fastening portion 63. The main part 65 and the hose insertion part 66 extending in the axial direction 67 of the motor shaft 27 from the base part 65 are connected to the suction port 24 via a sealing material 68 such as an O-ring.

  The cover body 70 is a bottomed cylinder, and includes a bottom portion 71 that faces the pump mounting side surface 43, a cylindrical portion 72 that extends from the bottom portion 71 toward the pump mounting side surface 43, and a bowl shape at the end of the cylindrical portion 72. The flange portion 73 is formed.

Next, a procedure for mounting the control circuit and the brushless motor will be described with reference to FIG.
As shown in FIG. 4A, the pump body 40 is provided with a recess 45 that houses the control circuit 25 at a position facing the brushless motor 28. The control circuit 25 is inserted into the recess 45, a fastener 38 is passed through the hole 37 of the control circuit 25, and the control circuit 25 is fixed to the circuit attachment portion 39 by the fastener 38.

  As shown in FIG. 4B, the motor shaft 27 of the brushless motor 28 is inserted into the shaft hole 42. Further, the tip of the yoke 28 a of the brushless motor 28 is fitted into the motor mounting portion 29 of the pump body 40.

  In FIG. 4C, the peripheral edge 28 b of the yoke 28 a is crimped to the motor mounting portion 29 as indicated by ▽. By caulking all around, the yoke 28 a is coupled to the pump body 40 and integrated with the pump body 40.

The configuration of each part of the vane pump will be described in more detail with reference to FIGS.
FIG. 5 is a cross-sectional view of the vane pump 10 assembled based on FIGS.
As shown in FIG. 5, a bearing 102 is provided in the shaft hole 42, and the shaft 27 of the motor is supported by the bearing 102. The tip of the motor shaft 27 fits into the involute spline hole 86 of the rotor 87, and the tip reaches the vicinity of the exhaust plate 101.

The flange portion 73 of the cover body 70 is in contact with the entire circumference of the sealing material 44, and the sealing material 44 ensures airtightness in the cover body 70.
On the other hand, the surface of the intake plate 94 is in contact with the entire circumference of the sealing material 47, and the opening of the intake groove 46 is blocked by the sealing material 47 and the intake plate 94, thereby forming the intake passage 103. As a result, an intake path including the connection pipe 60, the intake port 24, the intake passage 103, and the two intake holes (reference numerals 92 and 93) is formed.

An exhaust port 130 (described later in detail) is provided between the pair of fixing portions 41 and 41.
The third chamber 53 and the exhaust port 130 are communicated with each other by the first discharge passage 104. The first discharge passage 104 includes a lateral passage 106 that extends from the inner wall of the third chamber 53 toward the motor 28, and a longitudinal passage 107 that extends downward from the end of the lateral passage 106 and opens to the exhaust port 130. The 4th chamber 54 and the exhaust port 130 are connected by the 2nd discharge passage 108 extended in a perpendicular direction.

  The brushless motor 28 includes a yoke 28a that also functions as a housing, a stator 28c that is fixed to the inside of the yoke 28a, a bearing 28d that is provided at the bottom of the yoke 28a, and a bearing 28d that is rotatably supported by the bearing 28d. A motor shaft 27, and a rotor 28e provided to rotate integrally with the motor shaft 27.

  In the brushless motor 28, the peripheral portion 28 b of the yoke 28 a is caulked and joined to the motor mounting portion 29 of the pump body 40. The control circuit 25 is housed in the recess 45 of the pump body 45, and the control circuit 25 is fixed to the circuit mounting portion 39 with a fastener 38.

  As shown in FIG. 6, the recess 45 of the pump body 40 has a circular shape when viewed from the direction of the shaft 27 of the motor. A control circuit 25 having a circular shape is arranged along the circumferential shape of the recess 45. A hole 48 is provided in the central portion of the control circuit 25, and the motor shaft 27 is passed through the hole 48. The control circuit 25 is fixed to the pump body 40 with four fasteners 38.

  In the embodiment, the control circuit 25 has a circular shape, but the control circuit 25 is not limited to this, and may have other shapes as long as it is accommodated in the recess 45 such as a rectangle or a triangle. In the embodiment, four fasteners 38 are used, but the number of fasteners 38 is not limited as long as the control circuit 25 can be fixed to the pump body 40 such as two or three.

Next, the configuration of the plurality of chambers will be described in detail with reference to FIGS.
As shown in FIG. 7, the chambers 51 to 54 and the communication grooves 55 and 56 each open to the pump part (FIG. 3, reference numeral 80) side.

  The first chamber 51 is formed in an arc shape centered on the motor shaft 27 and is formed in a band shape with a width W1. The fourth chamber 54 has an outer shape surrounded by a straight line extending from side to side and an arc centered on the motor shaft 27. In the drawing, the maximum width (vertical direction) at the center of the fourth chamber 54 is indicated by W2, and the total length in the left-right direction is indicated by L1.

FIG. 8 is a view showing a configuration in which the pump unit 80 and the cover body 70 are attached to the structure of FIG.
As shown in FIG. 8, the openings of the second and third chambers (FIG. 7, reference numerals 52 and 53) and the first and second communication grooves (FIG. 7, reference numerals 55 and 56) are air intake plates 94. The whole is blocked.

  On the other hand, the first chamber 51 and the fourth chamber 54 formed along the outer periphery of the body part 40 are partially closed by the cover body 70 and the intake plate 94.

  Of the cylindrical portion 72 of the cover body 70, a portion facing the first chamber 51 is recessed so as to protrude toward the shaft 27 of the motor, and the hollow portion 124 of the opening of the first chamber 51 is formed in the recessed portion 124. Block the part 72 side. Also, the motor shaft 27 side of the opening of the first chamber 51 is closed by the intake plate 94.

  As a result, the first chamber 51 communicates with the inside of the cover body 70 through a gap having a width W3 that is significantly smaller than the width W1. The narrow gap with the width W3 becomes the exhaust passage 126. Exhaust air from the exhaust holes 97 and 98 flows from the inside of the cover body 70 through the exhaust passage 126 to the first chamber 51.

  Further, in the cylindrical portion 72 of the cover body 70, a portion facing the fourth chamber 54 is recessed so as to protrude toward the motor shaft 27, and the recessed portion 125 opens the lower portion of the fourth chamber 54. Block. Further, the upper opening of the fourth chamber 54 is closed with the intake plate 94.

  As a result, the fourth chamber 54 communicates with the inside of the cover body 70 by a gap having a width W4 that is much smaller than the width W2 and a left and right gap having a length L2 that is much smaller than the length L1. The narrow gap with the width W4 becomes the exhaust passage 127, and the left and right narrow gaps with the length L2 become the exhaust passages 128, 128. Exhaust air from the exhaust holes 97 and 98 flows from the inside of the cover body 70 to the fourth chamber 54 after being restricted by the exhaust passage 127 and the exhaust passages 128 and 128.

The operation of the negative pressure pump described above will be described next.
As shown in FIG. 9, when the motor (FIG. 3, reference numeral 28) operates, outside air is sucked into the connection pipe 60 by the suction action of the pump unit 80. The intake air passes through the connection portion structure 110 and the filter member 33 and is sucked into the suction port 24 (arrow (1)).

  The intake air that has entered the intake port 24 enters the pump unit 80 through the intake hole 92 and is pressurized and discharged from the exhaust hole 97 (arrow (2)), or is pumped from the intake hole 93 through the intake passage 103. Part 80 is pressurized and discharged from the exhaust hole 98 (arrow (3)). Exhaust gas discharged from the upper and lower exhaust holes 97 and 98 flows into the cover body 70.

  As shown in FIG. 10, in the cover body 70, the exhaust is guided to the exhaust port 130 through one of the two exhaust paths. In one path, the exhaust gas flows through the gap between the side portion of the pump unit 80 and the cover body 70, and then flows into the first chamber 51 through the exhaust passage (reference numeral 126 in FIG. 8) (arrow (4) ), (5)). The exhaust gas flowing into the first chamber 51 moves to the second chamber 52 through the first communication groove 55 (arrow (6)). The exhaust gas flowing into the second chamber 52 moves to the third chamber 53 via the second communication groove 56 (arrow (7)). When the exhaust gas flowing into the third chamber 53 reaches the plug member 132 through the first discharge passage 104, the exhaust passes through the space 143 so as to avoid the plug member 132, and is discharged into the atmosphere from the exhaust passage 133. (Arrow (8)).

  In the other exhaust path, the exhaust flows through the gap between the lower surface of the pump unit 80 and the cover body 70 (arrow (9)), and flows into the fourth chamber 54 via the exhaust passage 127 or the exhaust passage 128 (arrow). (10)). When the exhaust gas flowing into the fourth chamber 54 reaches the plug member 132 through the second discharge passage 108, it passes through the space 143 so as to avoid the plug member 132, and is discharged into the atmosphere from the exhaust passage 133. Arrow (11)).

Next, a modified example of the embodiment will be described with reference to the drawings.
FIG. 11 is a diagram showing a modification of FIG. The difference from FIG. 4 is that a groove 49 is formed on the outer periphery of the motor mounting portion 29. The rest of the configuration is the same as that in FIG.

  As shown in FIG. 11A, a groove 49 is formed on the outer periphery of the motor mounting portion 29 of the pump body 40 over the entire periphery. The front end 28f of the yoke 28a is abutted against the receiving surface 57 of the pump body 40. As shown by the arrow, an external force is applied to the distal end portion 28f to crimp it.

  Then, as shown in FIG. 11B, the front end portion 28f is bent along the groove 49, and the all-around caulking connection is completed. As a result, the tip 28f of the yoke 28a is engaged with the groove 49, and the yoke 28a is further difficult to be detached from the pump body 40.

According to the negative pressure pump acting as described above, the following effects can be obtained.
As shown in FIG. 7, the first chamber 51 and the fourth chamber (FIG. 8, reference numeral 54) are formed by overlapping a cover body (FIG. 8, reference numeral 70) on the body portion 40. Since it is only necessary to form a recess in the body portion 40, the chamber is easily formed.

As a means for closing a part of the opening of the chamber, it is conceivable to newly procure a dedicated part such as a plate. However, when a dedicated part is procured, the number of parts increases and the product cost increases.
In this regard, in the present embodiment, a part of the opening of each of the first chamber 51 and the fourth chamber (FIG. 8, reference numeral 54) is blocked by the recessed portion (FIG. 8, reference numerals 124 and 125) of the cover body. As a result, no special parts are required. As a result, the product cost can be suppressed.

  Further, since the plurality of chambers and the plurality of communication grooves are covered with the intake plate (FIG. 8, reference numeral 94), no dedicated parts are required. That is, an increase in the number of components can be suppressed by using the intake plate also as a component that covers the chamber and the communication groove.

  Further, since the exhaust gas flows through the gap between the pump part (FIG. 8, reference numeral 80) and the cover body (FIG. 8, reference numeral 70) and goes to the exhaust passage (FIG. 8, reference numerals 126 to 128), the exhaust gas is exhausted from the exhaust hole. There is no need to process a dedicated passage for guiding the exhaust to the passage in the pump section or the like. As a result, the processing cost of parts can be suppressed.

  As shown in FIG. 10, the exhaust path at the exhaust port 130 is a maze formed of the first exhaust passage 104, the second exhaust passage 108, a complex-shaped space portion 143, and a plurality of exhaust passages 133. With this complicated labyrinth, even if water enters from the outlet of the exhaust passage 133, water can be prevented from flowing back to the upstream side (pump side) from the plug member 132. Therefore, even when the motor is stopped (when the negative pressure pump is stopped), it is possible to prevent water from entering from the exhaust port 130 into the pump section (reference numeral 80). As a result, the function and durability of the negative pressure pump can be maintained.

  As shown in FIG. 5, the vane pump 10 is provided coaxially with the shaft 27 of the brushless motor 28 and is driven by the brushless motor 28, and includes a vane chamber (FIG. 2, reference numeral 81) for compressing air and the brushless. A pump body 40 provided with at least one of a suction port 24 and an exhaust port 130 (exhaust port 130) between the rotor 28e of the motor 28 and a bearing 102 that rotatably supports the rotor 28e; A control circuit 25 provided in the pump body 40 for controlling the brushless motor 28 and a yoke 28a of the brushless motor 28 having a form integrated with the pump body 40 are provided.

  With this configuration, bolts and packing can be omitted. As a result, the vane pump 10 driven by the brushless motor 28 can provide a pump capable of reducing the number of parts.

  As shown in FIG. 4 described above, the yoke 28a is configured such that the peripheral edge portion 28b of the yoke 28a is caulked and joined to the pump body 40 over the entire circumference.

With this configuration, the peripheral edge portion 28b of the yoke 28a is caulked and joined to the pump body 40, so that the number of parts such as screws for fixing the yoke can be reduced.
In addition, since the peripheral edge portion 28b of the yoke 28a is caulked and joined to the pump body 40, sealing performance can be achieved without using a seal member such as packing, and the number of parts can be further reduced. .
Furthermore, since it is caulking all around, the flange portion is not required, the outer diameter can be reduced, and the vane pump 10 can be downsized.

  As shown in FIG. 5, a control circuit 25 is fixed to the pump body 40 by a fastener 38 at a portion facing the brushless motor 28 in the pump body 40.

  With this configuration, the control circuit 25 is fixed to the pump body 40 by the fastener 38, and the control circuit 25 is covered by the brushless motor 28. Therefore, the control circuit 25 can be effectively protected without providing a dedicated cover. it can.

  As shown in FIG. 5 described above, a concave portion 45 for accommodating the control circuit 25 is provided in a portion facing the brushless motor 28, and the control circuit 25 is accommodated in the concave portion 45.

  With this configuration, the control circuit 25 is housed in the recess 45, so that the control circuit 25 can be more effectively protected. In addition, since the space in the recess 45 is used, the control circuit 25 can be accommodated efficiently.

Next, a second embodiment of the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected about the same structure as the structure shown in FIG. 5, and detailed description is abbreviate | omitted.
As shown in FIG. 12, the pump body 40 includes a flat portion 111 on the brushless motor 28 side. A circuit attachment portion 39 is provided on the flat surface portion 111, and the control circuit 25 is attached to the circuit attachment portion 39.

  A flange portion 28g is provided at the end of the yoke 28a. The brushless motor 28 is fixed to the pump body by crimping the motor mounting portion 112 of the flat portion 111 to the flange portion 28g.

Next, Embodiment 3 of the present invention will be described with reference to the drawings. The same components as those shown in FIG. 12 are denoted by the same reference numerals, and detailed description thereof is omitted.
As shown in FIG. 13, the motor mounting portion 112 is provided on the flat portion 111. A flange portion 28g of the yoke 28a is detachably fixed to the motor mounting portion 112 by a bolt 113. By removing the bolt 113, the brushless motor 28 can be easily removed.

  The vane pump of the present invention is suitable for a vane pump for a vehicle for making the negative pressure chamber of a negative pressure booster provided in the vehicle negative pressure, but the application is not particularly limited, and is for general machinery. It can be applied to general-purpose machines and general equipment. Moreover, the vane pump of this invention is not limited to the structure of an Example, If the vane and a rotor make a structure, the shape and form of a vane pump are also arbitrary.

  The vane pump of the present invention is suitable for a vane pump for a vehicle for making negative pressure in a negative pressure chamber of a negative pressure booster provided in the vehicle.

  DESCRIPTION OF SYMBOLS 10 ... Vane pump, 24 ... Suction port, 25 ... Control circuit, 27 ... Motor shaft, 28 ... Brushless motor, 28a ... Yoke, 28b ... Peripheral part, 28e ... Rotor, 40 ... Pump body, 45 ... Recess, 63 ... Fastening , 81 ... vane chamber, 102 ... bearing, 130 ... exhaust port (exhaust port).

Claims (4)

A vane pump provided coaxially with a brushless motor shaft and driven by the brushless motor,
A pump body fitted with a bearing that includes at least one of an intake port and an exhaust port and rotatably supports the rotor between a vane chamber that compresses air and the rotor of the brushless motor;
A control circuit for controlling the brushless motor provided in the pump body;
A vane pump, comprising: a yoke of the brushless motor having a form integrated with the pump body. The vane pump according to claim 1, wherein
The yoke has a vane pump in which a peripheral portion of the yoke is caulked and joined to the pump body. The vane pump according to claim 1 or 2,
In the pump body, the control circuit is fixed to the pump body by a fastener at a portion facing the brushless motor. The vane pump according to claim 3,
A vane pump characterized in that a concave portion for accommodating the control circuit is provided at a portion facing the brushless motor, and the control circuit is accommodated in the concave portion.

Images