JPH085349Y2 - Complex structure of pump and generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is configured such that a pump and a generator are arranged adjacent to each other, and a rotor of the pump and a rotor of the generator are coaxially rotated. TECHNICAL FIELD The present invention relates to a composite structure of a pump and a generator, and more particularly, to a technique for improving the accuracy of coupling the pump and the generator and simplifying the structure, for example, a structure effectively used for mounting on an automobile.

[Conventional technology]

Generally, a vacuum pump for an automobile, which is required to operate mechanisms such as a master cylinder for a brake or a clutch, a door opening / closing device, and various actuators mounted on an automobile, is driven by a traveling engine via a V-belt. Often integrated with a generator to increase the space efficiency of the engine room.

An example of such a composite structure of a pump and a generator is shown in FIG. In the composite structure of the pump and the generator shown in FIG. 5, the pump 51 and the generator 55 are arranged adjacent to each other, and a part of the casing 52 of the pump 51 is located between the bracket 56 of the generator 55. The plate 58 is sandwiched between the two, and the roller 53 having the vane 54 and the rotor (not shown) of the generator are rotated by the same shaft 57. And pump
The casing 52 of the pump 51, the plate 58, and the bracket 56 of the generator 55, in order to ensure the alignment between the casing 52 and the rotor 53 of the 51 and the rotor shaft 57 of the generator 55,
Positioning is carried out by a seal joint 59 between the plate and the bracket and a knock pin 60 between the plate and the casing.

[Problems to be solved by the device]

However, in such a composite structure of a pump and a generator, it is impossible to relax the tolerance of each part because an error occurs at a total of 5 places as follows, and the plate 58 is coupled to the inro. Since the part 59 is formed, there is a problem that the manufacturing cost of the plate increases.

(1) Concentricity between the rotating shaft 57 and the inro joint part 59 of the generator 55.

(2) The play between the female inro joint part of the generator 55 and the male inro joint part of the plate 58.

(3) Position accuracy with respect to the knock pin fitting hole of the plate 58 with respect to the inro joint part 59 of the plate 58.

(4) The knock pin 60 driven into the plate 58 and the knock pin fitting hole of the pump casing 52 are loose.

(5) Position accuracy of the knock pin fitting hole with respect to the inner diameter of the pump casing 52.

An object of the present invention is to provide a composite structure of a pump and a generator, which can improve the coupling accuracy between the pump and the generator and can reduce the manufacturing cost.

[Means for solving the problem]

A composite structure of a pump and a generator according to the present invention comprises a plate in which the pump and the generator are arranged adjacent to each other and a part of the casing of the pump is sandwiched between the bracket of the generator and the plate. In the composite structure of the pump and the generator, in which the rotor having the vane and the rotor of the generator are rotated by the same axis, a knock pin fitting portion is provided in the casing of the pump. At a position on an extension line of a line connecting the eccentric point between the casing and the rotor, located at the tip clearance side between the casing and the rotor, and provided so as to extend in the axial direction. A knock pin fitting portion is formed on the bracket of the generator by a correlation between a center line of the rotor of the generator and a plurality of mounting portions of the generator and the pump. It is arranged at a position corresponding to the knock pin fitting portion of the pump, and is opened so as to extend in the axial direction, and the knock pin penetrates a part of the plate in each of the knock pin fitting portions. It is characterized by being inserted.

[Action]

According to the above-mentioned means, the pump casing and the bracket of the generator are directly positioned by the one knock pin, so that the error interposed between them is suppressed to a total of three places. As a result, the positioning accuracy is improved. Further, since the inro joint connecting portion between the bracket and the plate of the generator is abolished, the manufacturing cost of the plate can be reduced.

〔Example〕

FIG. 1 is an enlarged partial vertical sectional view showing a composite structure of a pump and a generator, which is an embodiment of the present invention, FIG. 2 is its front view, FIG. 3 is an overall side view, and FIG. It is sectional drawing which follows the IV-IV line of a figure.

In this embodiment, as shown in FIG. 3, the composite structure of the pump and the generator has a structure in which the vacuum pump 1 and the generator 2 are adjacent to each other and integrally coupled, and the rotor and the rotor are rotated. The child and the pulley are rotated by the pulley 3.

In this composite structure of a pump and a generator, the vacuum pump 1 is provided with a casing 6, and the casing 6 has a substantially disk-shaped plate 5 on a body 4 formed in a substantially cylindrical shape with one end open and the other end closed. The pump chamber is formed by abutting the opening so as to be closed. Inside the casing 6, a rotor 9 formed in a cylindrical shape having a diameter smaller than the inner diameter of the casing 6 has a center line O _{1 in} a predetermined direction with respect to the center line O _{2 of the} casing 6,
Further, it is arranged so as to be eccentric by a predetermined amount, and a female spline 10 is formed on the center line O ₁ of the rotor 9.

A plurality of grooves 7 are arranged on the outer peripheral surface of the rotor 9 at equal intervals in the circumferential direction so as to extend in the direction parallel to the center line O ₁ , and are substantially equal to each other on the normal line of the center line O _1. The vane 8 is formed so as to have a depth, and each vane 8 formed in a substantially flat plate shape is slidably fitted in each groove 7 so as to advance and retreat in the radial direction. Vane 8 is groove 7
The three sides, excluding the end side fitted in, are slidably in contact with both side surfaces and the inner peripheral surface of the pump chamber between the main body 4 and the plate 5, respectively.

A suction port 11 and a discharge port 12 are opened in the upper part and the lower part of the casing 6, respectively.
Are disposed so that their inner and outer peripheral surfaces are in the closest positional relationship to each other in the tip clearance portion X located slightly behind the discharge port 12 in the rotational direction of the rotor 9.

An oil supply passage 13 is opened in an end surface wall of the main body 4 of the casing 6 so as to face the end surface of the rotor 9.
A plurality of oil supply grooves 14 are engraved on the end face of each of them in conformal radial lines. An annular groove 16 for accommodating the seal ring 15 is formed in a circular shape in the end surface of the casing body 4 on the side of the opening 4a so as to surround the pump chamber, and a circular window hole 17 is formed in the plate 5 at the center of the casing 6. It is opened concentrically with line O ₂ .

Three flange portions 18 are radially provided on the outer peripheral portion of the main body 4 of the casing 6 on the side of the opening 4a, and the plate portion 5 is also provided with flange portions 19 so as to correspond thereto. Flange parts of casing and plate
Insertion holes 22 and 23 for inserting bolts 21 are formed in 18 and 19, respectively.

On the other hand, the generator 2 is provided with a bracket 25, and the bracket 25 is provided with a shaft hole 26. One end of a rotating shaft 27, in which a rotor (not shown) is fixed inside the generator 2, is inserted into the shaft hole 26, and a male spline 28 is formed on the inserting end of the rotating shaft 27. It is set up.

At least a part of the end surface of the bracket 25 on the spline side is formed so as to be able to contact the plate 5, and an annular groove 33 for accommodating the seal ring 32 is recessed in the contact end surface 29. At the outer position, a plurality of screw holes 34 are arranged so as to correspond to the insertion holes 22 and 23 of the casing and the plate, respectively.

In the present embodiment, the casing 6 of the pump 1 has a knock pin fitting hole 20 as a knock pin fitting portion, which is a line connecting the center line O ₂ of the pump casing 6 and the center line O _{1 of the} rotor 9 which are eccentric to each other. It is arranged on the extension line at the tip clearance portion X side of the vane 8,
It is opened so as to extend in the axial direction. Further, the bracket 25 of the generator 2 has a knock pin fitting hole 30 as a knock pin fitting portion, a center line O _{1 of the} rotor of the generator 2, and a plurality of the generator 2 and the pump 1. It is arranged at a position corresponding to the knock pin fitting hole 20 of the pump 1 which is obtained by the correlation of the screw hole 34 as the mounting portion, and is opened so as to extend in the axial direction. A knock pin 31 is provided in each of the fitting hole 20 and the fitting hole 30 as the knock pin fitting portions.
Are penetrated through the through holes 24 formed in each of the above.

 Next, the operation will be described.

The bracket 25 of the generator 2 and the casing 6 of the pump 1 configured as described above are assembled by the following work.

First, the casing 6, the bracket 25 and the plate 5
The respective end faces are joined together, and the knock pin fitting hole 20, the knock pin fitting hole 30, the through hole 24, and the screw holes 34 and the insertion holes 22, 23 are aligned.

Next, knock pin insertion hole 20 and knock pin insertion hole
A knock pin 31 is inserted into the through hole 24 and fitted into the bolt 30, and a bolt 21 is inserted into the insertion holes 22 and 23 and screwed into the screw hole 34. Inserting this knock pin 31 and bolt 21
Due to the fastening by, the bracket 25 and the casing 6 are integrally coupled with the plate 5 sandwiched therebetween.

In this fastened state, the seal rings 15 and 32 are sandwiched between the plate 5 and the casing 6 and the bracket 25 to seal the pump chamber. When the bracket 25 and the casing 6 are assembled, the center lines O ₁ and O ₂ are set in the above-described predetermined eccentric relationship, so that the rotating shaft 27 and the rotor 9 are separated from each other by the male and female splines 10 and 28. When they are meshed with each other, they are coupled so as to rotate integrally. The center line O ₁ of the rotor 9 and the center line of the rotating shaft 27 are concentric with each other.

Here, since the casing 6 of the pump 1 and the bracket 25 of the generator 2 are directly positioned by the one knock pin 31, the error interposed between the two 6 and 25 is suppressed to the following three places. . As a result, the positioning accuracy of both 5, 25 is greatly improved. Moreover, since the inro joint connecting portion between the bracket 25 of the generator 2 and the plate 5 is eliminated, the manufacturing cost of the plate 5 can be reduced.

(1) Position accuracy of the knock pin fitting hole 20 with respect to the center line O ₂ of the casing 6.

(2) Position accuracy of the knock pin insertion hole 30 with respect to the center line (O ₁ ) of the rotary shaft 27 of the bracket 25.

(3) The knock pin 31 fitted in the knock pin fitting hole 20 and the knock pin fitting hole 30 is rattled.

By the way, since the positioning of the casing 6 and the bracket 25 is performed by one knock pin 31, an error in the circumferential direction of the casing 6 and the bracket 25, that is, in the circumferential direction of the center lines O ₁ and O ₂ is performed. Deviation error is likely to occur. This is because the positional relationship between the casing 6 and the bracket 25 that determines the correlation between the center lines O ₁ and O ₂ can rotate around the knock pin 31.

However, in the pump action described later, the casing 6
If the positional accuracy of the tip clearance portion X between the rotor 9 and the rotor 9 in the radial direction is accurately ensured, a small error in the circumferential direction of the tip clearance portion X causes almost no problem. The knock pin 31 allows rotation of the casing 6 and the bracket 25, but hardly allows radial displacement, so that the positional accuracy of the tip clearance portion X in the radial direction can be precisely ensured. .

That is, according to the present embodiment, the predetermined pump performance is ensured, the processing accuracy and the assembly accuracy are improved, and the manufacturing cost is reduced.

In the composite structure of the pump and the generator configured as described above, the rotating shaft 27 is rotated by the engine, and the rotor of the generator 2 and the rotor 9 are integrally rotated in the direction indicated by the arrow a in FIG. Then, since the vane 8 receives the centrifugal force and the casing 6 and the rotor 9 are eccentric, the vane 8 advances and retreats with respect to the groove 7 while maintaining the pressing contact with the inner peripheral surface of the casing 6. It will revolve around. As the vanes 8 revolve, the pressure chambers defined by the adjacent vanes 8 are expanded and contracted, so that air is sucked from the suction port 11 and discharged from the discharge port 12.

At the same time, the lubricating oil in the oil supply groove 14 receives a centrifugal force as the rotor 9 rotates, so that the lubricating oil is supplied from the oil supply passage 13 to the oil supply groove 13.
It will be captured by 14 and will flow out radially. The flow of the lubricating oil lubricates the sliding contact surfaces of the casing 6, the rotor 9 and the vanes 8 and maintains the airtightness inside the casing 6.

Needless to say, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention.

In the above-mentioned embodiment, the case where the invention is applied to the vacuum pump has been described, but the invention can also be applied to a positive pressure pump, a hydraulic pump and the like.

[Effect of device]

As described above, according to the present invention, since the pump casing and the generator bracket are directly positioned by the single knock pin, the error interposed between the two is suppressed at a total of three places. As a result, the positioning accuracy can be improved. Further, since the inro joint connecting portion between the bracket and the plate of the generator is abolished, the manufacturing cost of the plate can be reduced.

[Brief description of drawings]

FIG. 1 is an enlarged partial vertical sectional view showing a composite structure of a pump and a generator, which is an embodiment of the present invention, and FIG. 2 is a front view thereof.
FIG. 3 is an overall side view, and FIG. 4 is a sectional view taken along the line IV-IV in FIG. FIG. 5 is an enlarged partial vertical sectional view showing a conventional example. 1 ... Vacuum pump, 2 ... Generator, 3 ... Pulley, 4 ... Main body,
5 ... Plate, 6 ... Casing, 7 ... Groove, 8 ... Vane,
9 ... Rotor, 10 ... Female spline, 11 ... Suction port, 12 ... Discharge port, 13 ... Oil supply passage, 14 ... Oil supply groove, 15, 32 ... Seal ring,
16, 33 ... Annular groove, 17 ... Window hole, 18, 19 ... Flange portion, 20 ...
Knock pin insertion hole, 21 ... Bolt, 22, 23 ... Bolt insertion hole, 24 ... Through hole, 25 ... Bracket, 27 ... Rotating shaft, 28 ... Male spline, 29 ... Bracket end face, 30 ... Knock pin insertion hole, 31 ... Knock pin , 34… Screw holes.

Claims (1)

[Scope of utility model registration request] 1. A pump and a generator are arranged adjacent to each other, and a part of a casing of the pump is constituted by a plate sandwiched between a bracket of the generator and a rotor having vanes and a generator. In a composite structure of a pump and a generator configured so that the rotor of the machine is rotated by the same shaft, a knock pin fitting portion connects a eccentric point between the pump casing and the rotor to the casing of the pump. A position on the extension line of the wire, which is arranged at a position on the tip clearance side of the casing and the rotor, is opened so as to extend in the axial direction, and a knock pin is provided on the bracket of the generator. The fitting portion is determined by the centerline of the rotor of the generator and the knock pin of the pump obtained by the correlation between a plurality of mounting portions of the generator and the pump. It is arranged at a position corresponding to the fitting portion and is opened so as to extend in the axial direction, and knock pins are inserted into both of these knock pin fitting portions by penetrating a part of the plate. A composite structure consisting of a pump and a generator.