JP6170752B2 - pump - Google Patents

Description

  The present invention relates to a pump having a reed valve (a valve made of a cantilever), and more particularly to a structure of a valve presser for limiting the lift amount of the valve.

Conventionally, as a pump having a reed valve, one that suppresses the operation of an intake / exhaust valve by a pressing member is known in order to improve durability and reduce a noise value by limiting a lift amount of the valve.
FIG. 10 is an exploded perspective view showing a configuration of a main part of a conventional pump 101, FIGS. 11A and 11B are sectional views showing a valve structure of a conventional pump, and FIG. 11 is at the top dead center position, FIG. 11B shows the case at the bottom dead center position.

As shown in FIG. 10, the pump 101 is provided with a pump chamber 102 at an upper portion of a drive unit 101 a, for example, and a piston portion 103 is inserted into the pump chamber 102.
The piston portion 103 is configured by screwing a cup packing 103b and a cup packing presser plate 103c that perform a sealing function while sliding on the connecting rod 103a.
A top plate 105 having an intake port 110 and an exhaust port 120 is provided above the pump chamber 102 via a cylinder gasket 104. A pump head cover 101b is provided above the top plate 105 via a gasket 108. It is attached.

As shown in FIGS. 11 (a) and 11 (b), in the prior art, the intake air is sucked into the pump chamber 102, that is, the intake side portion with respect to the intake port 110 of the top plate 105 provided in the upper portion of the pump chamber 102. A valve 111 is provided, and the intake valve 111 is attached to the top plate 105 with a screw 113 together with an intake valve pressing member 112.
Further, an exhaust valve 121 is provided outside the pump chamber 102, that is, on the exhaust side of the exhaust port 120 of the top plate 105. The exhaust valve 121 is connected to the top plate 105 by a screw 123 together with the exhaust valve holding member 122. Is attached.

  In the prior art having such a configuration, an intake valve 111 and an intake valve pressing member 112 are provided on the intake side portion of the top plate 105, and as shown in FIG. In order to avoid contact with the intake valve presser member 112 when located at the dead center, the intake valve 111 and the intake valve presser member 112 are arranged by stroking the top plate 105 and the intake valve 111 is fastened using the screw 113. For this reason, the top plate 105 becomes thicker, and there is an extra space in the exhaust port 120. Therefore, an extra space (dead space) is generated in the pump chamber 102, and it is difficult to improve the compression ratio. There is a problem.

  In addition, the conventional technology requires the intake valve holding member 112, the exhaust valve holding member 122, and the screws 113 and 123, respectively. Therefore, the number of parts is large, and the assembly process is complicated due to screw fastening and the like. There is also a problem that leads to.

Japanese Patent Laid-Open No. 10-68386

  The present invention has been made in view of the problems of the prior art as described above, and an object of the present invention is to reduce dead space in the pump chamber in a pump having an intake / exhaust valve composed of a reed valve. Therefore, it is an object of the present invention to provide a technique capable of improving the compression ratio, reducing the number of parts, and simplifying the assembly process.

The present invention, which has been made to solve the above problems, is a pump in which an intake valve and an exhaust valve composed of reed valves are provided in a head portion of a pump chamber, and the volume of the pump chamber is changed. A flat plate-like main body portion having an intake port and an exhaust port, and inclined on the exhaust side surface of the main body portion so as to become thinner toward the intake port, and A top plate having an intake valve pressing portion formed in a concave shape so as to be continuous with the intake port, and a flat plate-like main body portion positioned in close contact with the top surface plate on the exhaust side. And an intake valve member in which the intake valve is provided integrally with the main body portion so as to overlap with an intake port and an intake valve holding portion of the top plate, and a close contact with the top plate to the exhaust side. It has a flat plate-shaped main body part to be arranged, An exhaust valve member in which the exhaust valve is provided integrally with the main body portion so as to overlap with an exhaust port of the top plate, and a flat plate-like main body positioned in close contact with the intake valve member on the exhaust side A flat plate-like member that is positioned and arranged in close contact with the exhaust valve member with respect to the exhaust valve member, and an intake port member provided with an intake hole so as to overlap the intake valve on the main body portion An exhaust valve having a main body portion, an exhaust hole provided in the main body portion so as to overlap with the exhaust valve, and an exhaust valve holding portion provided integrally with the main body portion so as to overlap with the exhaust valve It possesses a pressing member, the distal end portion of the intake valve, with overlaps the intake port of the top plate does not contact with the edge of the air inlet, further protrude to the intake side side from the intake port of the top plate It is configured so that there is no.
The present invention is also effective when the intake valve member and the exhaust valve member are integrally configured.
The present invention is also effective when the intake port member and the exhaust valve pressing member are integrally formed .

In the present invention, the air inlet side (50a) of the main body (50) of the top plate (5) is inclined so as to become thinner toward the air inlet (51), and the air inlet (51 ) And the intake valve holding portion (52) having a concave shape so as to be continuous with the top surface plate (5), and an intake air having a flat plate-like main body portion positioned in close contact with the exhaust side surface (50a). A valve member is provided, and an intake valve (62) composed of a reed valve is provided on the main body of the intake valve member so as to overlap the intake port (51) and the intake valve retainer (52) of the top plate (5). Since it is provided integrally, the surface (50b) on the pump chamber side of the top plate (5), that is, the intake side surface (50b), except for the minimum necessary holes (for example, the intake port (51) and the exhaust port (53)). The surface can be flattened, and thereby the range of the thickness (wall thickness) of the top plate (5) In it is possible to provide a structure for pressing the intake valve (62), dead space in the pump chamber can be reduced greatly.
As a result, according to the present invention, the compression ratio can be improved to improve the flow rate in the intermediate pressure zone, and the pump head portion can be made thin, so that the weight of the pump can be reduced.

  In the present invention, the recessed intake valve pressing portion (52) is formed in the main body (50) of the top plate (5), and the intake valve (62) is provided integrally with the main body of the intake valve member. The exhaust valve (64) is provided integrally with the main body of the exhaust valve member, the exhaust valve presser (73) is provided integrally with the main body of the exhaust valve presser member, and the valve and valve presser member are Since it is provided without using any screws, the number of screws can be reduced and the assembly process such as screw fastening can be simplified, so that the cost can be reduced.

  In addition, since the intake valve pressing portion (52) is formed in the main body portion (50) of the top plate (5), the number of parts can be reduced by one point compared to the case where these are separate members, As a result, the number of component parts can be reduced and the assembly process can be simplified, so that further cost reduction can be achieved.

  In the present invention, when the intake valve member and the exhaust valve member are integrally configured (for example, the intake / exhaust valve member 6 described later), the number of parts is reduced by one point compared to the case where these are separate members. As a result, the number of components can be reduced and the assembling process can be simplified, so that further cost reduction can be achieved.

  In the present invention, when the intake port member and the exhaust valve pressing member are integrally formed (for example, an exhaust valve pressing member 7 described later), the number of parts is 1 as compared with the case where these are separate members. Since the number of components can be reduced and the number of components can be reduced and the assembling process can be simplified, the cost can be further reduced.

In the present invention, since the front end portion of the intake valves (62) is configured so as not to contact the edge of the inlet with overlaps the intake port of the top plate (5) (51), the intake valve The tip crack which is one of the failure modes of (62) can be prevented and durability can be improved. Moreover, noise can be reduced.

The disassembled perspective view which shows the principal part structure of embodiment of the pump which concerns on this invention (A)-(c): Shows the configuration of the top plate in the present embodiment, FIG. 2 (a) is a perspective view, FIG. 2 (b) is the exhaust side surface 50a side (arrow A on FIG. 2 (a)). FIG. 2C is a plan view seen from the intake side surface 50b side (arrow B direction side in FIG. 2A). (A) (b): The structure of the intake / exhaust valve member in the present embodiment is shown. FIG. 3 (a) is a perspective view, and FIG. 3 (b) is the exhaust side surface 60a side (arrow on FIG. 3 (a)). A plan view from the A direction side) (A) (b): This shows the positional relationship between the top plate 5 and the intake / exhaust valve member 6. FIG. 4 (a) is a perspective view, and FIG. 4 (b) is the intake side 50b side (FIG. 4 ( Plan view seen from arrow B direction side of a) (A) (b): Explanatory drawing which shows the dimensional relationship between the intake valve 62 of the intake / exhaust valve member 6 in this Embodiment, the intake valve pressing part 52 of the top | upper surface board 5, and the inlet 51. (A) (b): The structure of the exhaust valve pressing member 7 in this Embodiment is shown, FIG. 6 (a) is a perspective view, FIG.6 (b) is the exhaust side surface 70a side (FIG. 6 (a)). Plan view seen from arrow A direction side) (A) (b): The positional relationship of each part of the intake / exhaust valve member 6 and the exhaust valve pressing member 7 is shown, FIG. 7 (a) is a perspective view, FIG.7 (b) is the exhaust side surface 70a side (FIG. 7 (a) arrow A direction side plan view The perspective view which shows the positional relationship of each part of the top | upper surface board 5, the intake / exhaust valve member 6, and the exhaust valve pressing member 7. FIG. (A) (b): It is sectional drawing which shows the valve structure of the pump of this Embodiment, FIG.9 (a) is when the piston part 3 exists in a top dead center position, FIG.9 (b) is a bottom dead center position. If Exploded perspective view showing the main configuration of a conventional pump (A) (b): It is sectional drawing which shows the valve structure of the pump of a prior art, Fig.11 (a) is when the piston part 103 exists in a top dead center position, FIG.11 (b) exists in a bottom dead center position Case

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is an exploded perspective view showing a main configuration of an embodiment of a pump according to the present invention.
As shown in FIG. 1, the pump 1 of the present embodiment is provided with a head cover 1b on the top of a drive unit 1a (a drive source is omitted in the figure), and the following members are provided in the head cover 1b. Is arranged.

A pump chamber 2 is provided in the upper portion of the drive unit 1a, and a piston portion 3 that reciprocates by an eccentric shaft fastened to a motor (not shown) is inserted into the pump chamber 2.
The piston portion 3 is configured by screwing a cup packing 3b and a cup packing presser plate 3c that perform a sealing function while sliding on the connecting rod 3a.

On the other hand, a top plate 5 is attached to the upper part of the pump chamber 2 via a cylinder gasket 4.
An intake / exhaust valve member 6 and an exhaust valve pressing member 7 are sequentially provided on the exhaust side surface 50 a of the top plate 5, and a head gasket 8 is further provided on the exhaust valve pressing member 7.

  2A to 2C show the configuration of the top plate 5 in the present embodiment. FIG. 2A is a perspective view, and FIG. 2B is the exhaust side surface 50a side (FIG. 2A). 2) is a plan view seen from the arrow A direction side), and FIG. 2C is a plan view seen from the intake side surface 50b side (arrow B direction side in FIG. 2A).

As shown in FIGS. 2A to 2C, the top plate 5 of the present embodiment has a main body portion 50 made of, for example, aluminum die casting and formed in a disc shape with a predetermined thickness. . The exhaust side surface 50a of the main body 50 is configured so that the flatness of the entire surface is ensured and has high sealing properties when in close contact with the flat plate.
The main body 50 is provided with two intake ports 51 and two intake valve retainers 52. In the present invention, the number of the intake ports 51 and the intake valve pressing portions 52 is arbitrary.

In the case of the present embodiment, the intake port 51 penetrates the main body 50 and is formed in a semicircular shape.
On the other hand, the intake valve pressing portion 52 is, for example, inclined in a flat shape so that the thickness decreases toward the straight portion of the intake port 51, and is recessed so as to be continuous with the edge portion of the straight portion of the intake port 51. Are integrally formed.

In the case of the present invention, the intake valve pressing portion 52 may be curved or formed in a spherical shape.
Further, the intake valve pressing portion 52 is formed to correspond to an intake valve 62 described later.

  The portion corresponding to the intake valve pressing portion 52 on the intake side surface 50b of the main body 50 (the portion indicated by the reference numeral 52b in FIG. 2C) and the other portions are planar without providing irregularities that can become dead spaces. Is formed.

Exhaust ports 53 are provided at predetermined positions of the main body 50.
These two exhaust ports 53 penetrate the main body 50 and are formed in a circular shape, for example.
Furthermore, a plurality (two in this embodiment) of positioning pins 54 are provided on the edge of the exhaust side surface 50a of the main body 50.

  3 (a) and 3 (b) show the configuration of the intake / exhaust valve member 6 in the present embodiment. FIG. 3 (a) is a perspective view, and FIG. 3 (b) is the exhaust side surface 60a side (FIG. 3 ( It is the top view seen from the arrow A direction side of a).

As shown in FIGS. 3 (a) and 3 (b), the intake / exhaust valve member 6 of the present embodiment is an integral structure of the intake valve member and the exhaust valve member of the present invention.
The intake / exhaust valve member 6 has a main body portion 60 made of, for example, stainless steel and having a thickness smaller than that of the top surface plate 5 and formed in a disk shape having the same shape as the main body portion 50 of the top surface plate 5, for example.

Here, a plurality (two in the present embodiment) of positioning holes 65 are provided at the edge of the main body 60.
These positioning holes 65 are provided at the same intervals as the positioning pins 54 so as to fit the positioning pins 54 of the top plate 5 described above.

  Further, in addition to the positioning pins 54 of the top plate 5 and the positioning holes 65 of the intake / exhaust valve member 6 being fitted, the outer peripheral portions of the main body 50 of the top plate 5 and the main body 60 of the intake / exhaust valve member 6 are flush with each other. By being configured so as to be (smooth), the positioning accuracy of the intake valve 62 described below of the intake / exhaust valve member 6 and the intake valve pressing portion 52 of the top plate 5 is ensured.

  In the main body 60 of the intake / exhaust valve member 6, for example, a notch 61 is formed so that two intake valves 62 in the form of elongated tongue pieces (reed valve) are provided integrally with the main body 60. Yes.

As will be described later, the intake valve 62 is provided so as to correspond to the intake valve pressing portion 52 described above.
Further, the main body portion 60 of the intake / exhaust valve member 6 is provided with two long and slender tongue-shaped (reed valve-shaped) exhaust valves 64 by forming, for example, notches 63.

  4 (a) and 4 (b) show the positional relationship between the top plate 5 and the intake / exhaust valve member 6. FIG. 4 (a) is a perspective view, and FIG. It is the top view seen from the arrow B direction side of Fig.4 (a).

  4 (a) and 4 (b), in the present embodiment, the positioning pin 54 of the top plate 5 and the positioning hole 65 of the intake / exhaust valve member 6 are fitted to each other so that the exhaust side surface of the top plate 5 is fitted. The intake / exhaust valve member 6 is positioned and arranged in close contact with 50a.

  In this state, the intake valve 62 of the intake / exhaust valve member 6 overlaps the intake valve retainer 52 and the intake port 51 of the top plate 5, and the exhaust valve 64 of the intake / exhaust valve member 6 and the exhaust port of the top plate 5 53 is configured to overlap.

In this case, as shown in FIG. 4B, the intake valve 62 of the intake / exhaust valve member 6 is formed narrower than the intake valve retainer 52 and the intake port 51 of the top plate 5, and the tip of the intake valve 62 is The size, position and shape of the intake valve 62 of the intake / exhaust valve member 6 are determined so as to overlap the intake port 51 of the top plate 5 and not to contact the edge of the curved portion of the intake port 51.
Further, the size, position and shape of the exhaust valve 64 of the intake / exhaust valve member 6 are determined so that the exhaust valve 64 of the intake / exhaust valve member 6 covers the exhaust port 53 of the top plate 5.

5A and 5B are explanatory views showing the dimensional relationship between the intake valve 62 of the intake / exhaust valve member 6 and the intake valve pressing portion 52 and the intake port 51 of the top plate 5 in the present embodiment.
As shown in FIGS. 1 and 5A and 5B, in this embodiment, the intake valve 62 of the intake / exhaust valve member 6 is moved to the intake side surface of the top plate 5 of the pump chamber 2 in accordance with the intake operation of the pump 1. It is sucked to the 50b side and is configured to come into contact with and closely contact the intake valve presser portion 52 of the top plate 5.

  In the present embodiment, in the state shown in FIG. 5B, the tip end portion 62a of the intake valve 62 is prevented from protruding from the intake port 51 of the top plate 5 toward the intake side surface 50b. The length L of the tip 62a of the intake valve 62 shown, the inclination angle θ of the intake valve retainer 52 of the top plate 5, and the thickness T of the edge 51a of the intake port 51 of the top plate 5 are set.

  Specifically, when the intake valve holder 52 of the top plate 5 is flat, the length L of the tip 62a of the intake valve 62 and the intake valve holder of the top plate 5 are set so that L · Sinθ <T. The inclination angle θ of the portion 52 and the dimension of the thickness T of the edge portion 51a of the air inlet 51 of the top plate 5 are set.

  6A and 6B show the configuration of the exhaust valve pressing member 7 in the present embodiment. FIG. 6A is a perspective view, and FIG. 6B is the exhaust side surface 70a side (FIG. It is the top view seen from the arrow A direction side of a).

  As shown in FIGS. 6 (a) and 6 (b), the exhaust valve pressing member 7 of the present embodiment is configured by integrally forming the intake port member and the exhaust valve pressing member in the present invention. As will be described later, an intake hole 71 is provided in the main body 70 of the exhaust valve pressing member 7.

The exhaust valve pressing member 7 of the present embodiment has a main body portion 70 made of, for example, an aluminum sheet metal and formed in a disk shape having a predetermined thickness, for example, the same shape as the main body portion 50 of the top plate 5.
Here, a plurality (two in the present embodiment) of positioning holes 74 are provided at the edge of the main body 70.
These positioning holes 74 are provided at the same interval as the positioning pins 54 so as to fit with the positioning pins 54 of the top plate 5 described above.

  Then, as shown in FIG. 8 described later, in addition to the positioning pin 54 of the top plate 5, the positioning hole 65 of the intake / exhaust valve member 6 described above, and the positioning hole 74 of the exhaust valve pressing member 7 being fitted, By configuring the outer peripheral portion of the main body portion 50 of the top plate 5, the main body portion 60 of the intake / exhaust valve member 6, and the main body portion 70 of the exhaust valve holding member 7 to be flush, The positioning accuracy of the exhaust valve 64 of the exhaust valve member 6 and the exhaust valve retainer 73 of the exhaust valve retainer member 7 described below is ensured.

The main body 70 of the exhaust valve pressing member 7 is provided with two intake holes 71 that pass through the main body 70 and are formed in a circular shape, for example.
Further, in the main body portion 70 of the exhaust valve pressing member 7, for example, the main body portion 70 is notched to form an exhaust hole 72, so that an elongated tongue-shaped exhaust valve pressing portion 73 is integrated with the main body portion 70. Two are provided.

  The exhaust valve retainer 73 is formed to bend toward the exhaust side 70a with the intake side 70b side of the main body 70 as a fulcrum, and corresponds to the exhaust valve 64 of the intake / exhaust valve member 6 described above, as will be described later. Is provided.

  7 (a) and 7 (b) show the positional relationship between the intake / exhaust valve member 6 and the exhaust valve presser member 7, FIG. 7 (a) is a perspective view, and FIG. 7 (b) is an exhaust side surface 70a. It is the top view seen from the side (arrow A direction side of Fig.7 (a)).

  As shown in FIGS. 7 (a) and 7 (b), in the present embodiment, the intake / exhaust valve is in a state where the positioning hole 65 of the intake / exhaust valve member 6 and the positioning hole 74 of the exhaust valve holding member 7 overlap. The exhaust valve pressing member 7 is positioned and disposed in close contact with the exhaust side surface 60 a of the main body 60 of the member 6.

  In this state, the intake valve 62 of the intake / exhaust valve member 6 and the intake port 71 of the exhaust valve retainer member 7 overlap, the exhaust valve 64 of the intake / exhaust valve member 6, and the exhaust hole of the exhaust valve retainer member 7. The part 72 and the exhaust valve pressing part 73 are configured to overlap.

In this case, as shown in FIG. 7B, the size and position of the intake hole 71 so that the intake hole 71 of the exhaust valve pressing member 7 is covered with the intake valve 62 of the intake / exhaust valve member 6. Is stipulated.
On the contrary, the intake valve 62 of the intake / exhaust valve member 6 is set so that the intake hole 71 of this size can be sufficiently sealed on condition that the flow rate of the pump is satisfied.
Further, as shown in FIG. 7B, the outer portion 72 a of the exhaust hole 72 of the exhaust valve pressing member 7 is formed wider than the exhaust valve 64 of the intake / exhaust valve member 6.

FIG. 8 is a perspective view showing the positional relationship between the top plate 5, the intake / exhaust valve member 6, and the exhaust valve presser member 7.
FIGS. 9A and 9B are cross-sectional views showing the valve structure of the pump according to the present embodiment. FIG. 9A shows a case where the piston portion is at the top dead center position, and FIG. It shows the case where it is at the bottom dead center position.

  When the piston portion 3 is moved to the bottom dead center side in the present embodiment having the above-described configuration, the intake valve 62 of the intake / exhaust valve member 6 is curved toward the exhaust side surface 50a side of the top plate 5 and the exhaust valve holding member 7 is moved. And the intake valve 62 of the intake / exhaust valve member 6 is in close contact with the intake valve pressing portion 52 on the exhaust side surface 50 a of the top plate 5.

  In this state, as shown in FIGS. 4B and 5, there is a gap between the intake valve 62 of the intake / exhaust valve member 6 and the intake port 51 of the top plate 5. Gas is introduced into the pump chamber 2 through the intake hole 71, the notch 61 of the intake / exhaust valve member 6, and the intake port 51 of the top plate 5.

  At the same time, the exhaust valve 64 of the intake / exhaust valve member 6 is in close contact with the exhaust side surface 50 a of the main body 50 of the top plate 5, and the exhaust valve 64 closes the exhaust port 53 of the top plate 5. Thus, no gas is introduced into the pump chamber 2.

On the other hand, when the piston portion 3 is moved to the top dead center side, the exhaust valve 64 of the intake / exhaust valve member 6 is curved toward the exhaust valve holding members 7 and 70b, the exhaust port 53 of the top plate 5 is opened, The exhaust valve 64 of the intake / exhaust valve member 6 is in close contact with the exhaust valve retainer 73 of the exhaust valve retainers 7 and 70b.
Thereby, the gas is discharged out of the pump chamber 2 through the exhaust port 53 of the top plate 5, the notch 63 of the intake / exhaust valve member 6, and the exhaust hole 72 of the exhaust valve pressing member 7.

At the same time, the intake valve 62 of the intake / exhaust valve member 6 comes into close contact with the intake side surface 70b of the main body 70 of the exhaust valve retainer member 7, and the intake hole 71 of the exhaust valve retainer member 7 is closed by the intake valve 62. Therefore, no gas is sucked into the pump chamber 2 through the intake hole 71.
By repeating the above operation, desired intake and exhaust are performed.

  As described above, in the present embodiment, the exhaust side surface 50 a of the main body 50 of the top plate 5 is inclined so as to become thinner toward the intake port 51 and is continuous with the intake port 51. And the intake and exhaust valve member 6 having a flat plate-like main body portion 60 positioned in close contact with the exhaust side surface 50a with respect to the top plate 5 is provided. Since the intake valve 62 of the intake / exhaust valve member 6 is provided integrally with the main body 50 so as to overlap the intake port 51 and the intake valve retainer 52 of the top plate 5, the pump chamber 2 of the top plate 5 is provided. With respect to the inner side, that is, the intake side surface 50b, surfaces other than the minimum necessary holes (the intake port 51 and the exhaust port 53) can be formed into a flat surface, whereby the intake air is within the range of the thickness (thickness) of the top plate 5. Since a structure for pressing the valve 62 can be provided As shown in FIG. 9 (a) (b) and FIGS. 11 (a) (b), it is possible to significantly reduce the dead space in the pump chamber 2 as compared to the prior art.

  As a result, according to the present embodiment, the compression ratio can be improved to improve the flow rate in the intermediate pressure zone, and the pump head portion can be made thin, so that the weight of the pump can be reduced. .

  Further, in the present embodiment, the top plate 5 in which the recessed intake valve pressing portion 52 that can be positioned is formed in the main body 50, and the intake valve 62 and the exhaust valve 64 are integrally provided in the main body 60. The intake / exhaust valve member 6 and the exhaust valve retainer 73 are provided integrally with the main body 70, and the valve and the valve retainer are provided without using any screws. As a result, the number of screws can be reduced and the assembly process such as screw fastening can be simplified, so that the cost can be reduced.

  In addition, since the intake valve retainer 52 is formed on the main body 50 of the top plate 5, the number of parts can be reduced by one compared to the case where these are used as separate members, thereby reducing the number of components. In addition, since the assembly process can be simplified, further cost reduction can be achieved.

  In addition, in the present embodiment, the intake valve 62 and the exhaust valve 64 are integrally provided in the main body 60 of the intake / exhaust valve member 6, and the intake hole 71 is provided in the main body 70 of the exhaust valve holding member 7. Therefore, it is possible to reduce the number of parts by one point compared to the case where these are used as separate members, thereby reducing the number of component parts and simplifying the assembly process. Cost can be reduced.

  Furthermore, in the present embodiment, since the intake port 51 is arranged on the top plate 5 so as to overlap the tip of the intake valve 62, the tip of the intake valve 62 is placed on the top plate 5 when opening and closing the valve. Since it does not come into contact with the main body 50, it is possible to prevent the tip crack, which is one of the failure modes of the intake valve 62, and improve the durability. Moreover, noise can be reduced.

The present invention is not limited to the above-described embodiment, and various changes can be made.
For example, in the above-described embodiment, a configuration in which two intake valves 62 and two exhaust valves 64 are provided is employed. However, the present invention is not limited to the number of intake valves 62 and exhaust valves 64.

In the above-described embodiment, the intake valve 62 and the exhaust valve 64 are integrally provided in the main body 60 of the intake / exhaust valve member 6, but the present invention is not limited to this, and the intake valve member, the exhaust valve, Each member can also be provided.
However, from the viewpoint of reducing the number of parts, it is preferable to integrally configure the intake valve 62 and the exhaust valve 64 on the main body portion 60 of the intake / exhaust valve member 6 as in the above embodiment.

In addition, although the intake hole 71, the exhaust hole 72, and the exhaust valve retainer 73 are integrally provided in the main body 70 of the exhaust valve retainer member 7, the present invention is not limited to this, and the intake air An intake port member having a hole for use and an exhaust valve holding member having an exhaust hole and an exhaust valve presser can also be provided.
However, from the viewpoint of reducing the number of parts, the intake hole 71, the exhaust hole 72, and the exhaust valve retainer 73 are integrated with the main body 70 of the exhaust valve retainer 7 as in the above embodiment. Preferably, it is provided.

  Furthermore, the present invention is not only a piston pump as in the above embodiment, but also a bellows pump, a diaphragm pump, as long as it is a volume transfer type pump having an intake / exhaust valve composed of a reed valve and changing the volume in the pump chamber. It can be applied to various pumps such as a rotary pump.

DESCRIPTION OF SYMBOLS 1 ... Pump 2 ... Pump chamber 3 ... Piston part 5 ... Top plate 6 ... Intake / exhaust valve member 7 ... Exhaust valve pressing member 50 ... Main part 50a of top plate ... Exhaust side surface 50b ... Intake side surface 51 ... Intake port 52 ... Intake valve Presser 53 ... Exhaust port 60 ... Main body 60a of intake / exhaust valve member ... Exhaust side surface 60b ... Intake side surface 62 ... Intake valve 64 ... Exhaust valve 70 ... Exhaust valve presser member main body 70a ... Exhaust side surface 70b ... Intake side surface 71 ... Intake hole 72 ... Exhaust hole 73 ... Exhaust valve retainer

Claims (3)

An intake valve and an exhaust valve constituted by reed valves are provided in the head portion of the pump chamber, and the pump changes the volume in the pump chamber,
Arranged in the head portion of the pump chamber, having a flat plate-like main body portion having an intake port and an exhaust port, inclined on the exhaust side surface of the main body portion so as to become thinner toward the intake port, And the top plate having an intake valve pressing portion formed in a concave shape so as to be continuous with the intake port,
A flat plate-like main body portion positioned in close contact with the exhaust side with respect to the top plate, and the intake valve is disposed on the main plate so as to overlap the intake port and the intake valve retainer portion of the top plate. An intake valve member provided integrally with the main body,
It has a flat plate-like main body portion positioned in close contact with the top surface plate on the exhaust side, and the exhaust valve is integrated with the main body portion so as to overlap the exhaust port of the top plate. An exhaust valve member provided in
An intake port member having a flat plate-like main body portion positioned in close contact with the exhaust valve member on the exhaust side and provided with an intake hole portion on the main body portion so as to overlap the intake valve; ,
The exhaust valve member has a flat plate-like main body portion that is positioned in close contact with the exhaust side. The main body portion is provided with an exhaust hole so as to overlap the exhaust valve, and the exhaust valve exhaust valve pressing portion is closed and an exhaust valve retainer member provided integrally with the main body portion so as to overlap,
A front end portion of the intake valve overlaps with an intake port of the top plate, does not come into contact with an edge portion of the intake port, and further, does not protrude from the intake port of the top plate to the intake side surface side. pump.   The pump according to claim 1, wherein the intake valve member and the exhaust valve member are integrally formed. The pump according to any one of claims 1 and 2, wherein the intake port member and the exhaust valve pressing member are integrally formed .

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