TWI623687B - Pump - Google Patents

Abstract

An object of the present invention is to provide a pump having a suction valve and a discharge valve composed of a reed valve, which can increase the compression ratio by reducing the ineffective space in the pump chamber, and can reduce the number of parts while achieving Simplified technology for assembly steps.

The pump of the present invention is formed on the exhaust side surface (50a) of the main body portion (50) of the top panel (5) provided on the upper part of the pump chamber (2): it is formed to be thinner toward the suction port (51) The suction valve pressing portion (52) is inclined and connected to the suction port (51) and has a concave shape.

A suction / exhaust valve member (6) having "a flat plate-shaped body portion (60) positioned and arranged close to the exhaust side on the top panel (5)" is provided, and is integrally provided on the suction / exhaust valve member (6) The air inlet valve (62) of the main body portion (60) is provided so as to overlap the air inlet (51) and the air inlet valve pressing portion (52) of the top panel (5).

Description

Pump

The present invention relates to a pump having a reed valve (a valve formed by a cantilever), and more particularly to a structure of a valve guard (also referred to as a valve pressing member) for limiting a valve lift amount.

Conventionally, as for a pump having a reed valve, there is known a method of restricting the operation of an intake and exhaust valve by pressing a member in order to achieve an increase in durability and reduce a noise value by limiting a head amount of the valve. Technology.

Fig. 10 is an exploded perspective view showing an important structure of the pump 101 of the conventional technology, and Figs. 11 (a) and (b) are sectional views showing a valve structure of the pump of the conventional technology, of which Fig. 11 (a ) Shows the case where the piston portion is located at the top dead center position, and FIG. 11 (b) shows the case where the piston portion is located at the bottom dead center position.

As shown in FIG. 10, the pump 101 includes, for example, a pump chamber 102 provided on an upper portion of the driving portion 101a, so that the piston portion 103 is inserted. Into the pump chamber 102.

The cup packing 103b, which "seals the piston part 103 while sliding, can achieve a sealing function", and the cup-shaped pad pressing plate 103c are locked and fixed to the connecting rod 103a to constitute the piston part 103.

Next, a "top panel 105 having an intake port 110 and an exhaust port 120" is provided on the upper part of the pump chamber 102 via a cylinder gasket 104, and an upper part of the top panel 105 is provided with a pad therebetween. The sheet 108 is mounted with a pump head cover 101b.

As shown in Figs. 11 (a) and (b), in the conventional technology, the suction port 110 of the top panel 105 provided on the upper part of the pump chamber 102 is inside the pump chamber 102, which means An intake valve 111 is provided on the intake side, and the intake valve 111 is mounted on the top panel 105 together with the intake valve pressing member 112 by screws 113.

In addition, with respect to the exhaust port 120 of the top panel 105, an exhaust valve 121 is provided outside the pump chamber 102, that is, a portion on the exhaust side, and the exhaust valve 121 is borrowed together with the exhaust valve pressing member 122. The top plate 105 is attached by screws 123.

In the conventional technology having such a structure, an intake valve 111 and an intake valve pressing member 112 are provided on the suction side portion of the top plate 105, as shown in FIG. 11 (a), when the piston portion 103 is positioned At the top dead center, in order to avoid contact with the suction valve pressing member 112, the top panel 105 is drilled to configure the suction valve 111 and the suction valve pressing member 112, and the suction valve is locked with a screw 113 111 and increase the thickness of the top panel 105, because of the existence of excess space in the exhaust port 120, resulting in the pump chamber A dead space (dead space) is generated in 102, and there is a problem that it is difficult to increase the compression ratio.

In addition, in the conventional technology, since the intake valve pressing member 112, the exhaust valve pressing member 122, and the screws 113 and 123 are respectively required, the number of parts is large, and assembly steps such as fixing with screws are complicated, and thus are derived The so-called cost increase problem.

[Advanced technical literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 10-68386

The present invention has been developed in view of the problems of the above-mentioned conventional technology, and an object of the present invention is to provide a pump having a suction and exhaust valve constituted by a reed valve by reducing the pump chamber The technology can improve the compression ratio and reduce the number of parts while simplifying the assembly steps.

The present invention developed in order to solve the above-mentioned problems is a pump in which an intake valve and an exhaust valve composed of a reed valve are provided on the head of a pump chamber, and the volume of the pump chamber is changed, which includes: It is arranged on the head of the pump chamber, and has a "flat plate-shaped body portion having an air inlet and an air outlet". The top panel is formed by a thin and inclined port, and is connected to the suction port to form a concave-shaped suction valve pressing part "; and" a flat panel having a flat shape positioned and positioned close to the exhaust side on the top panel " A main body part, an intake valve member in which the intake valve and the main body part are integrated with each other so as to overlap the intake port and the intake valve pressing part of the top panel; and The flat-shaped body part positioned on the exhaust panel is positioned on the exhaust side, and the exhaust valve is integrally formed with the exhaust part of the top surface part in the body part. A member; and a "suction plate having a flat plate-shaped body portion positioned close to the exhaust side and arranged on said intake valve member, and an intake hole portion provided in the body portion so as to overlap with the intake valve" A port member; and "having a flat plate-shaped body portion positioned close to the exhaust side and arranged on said exhaust member, and an exhaust hole portion is provided on the body portion so as to overlap with the exhaust valve, And press the exhaust valve so as to overlap with the exhaust valve Portion and the body portion of the pressing member is provided integrally to the exhaust valve "in.

In the present invention, even when the intake valve member is integrally formed with the exhaust valve member, the same effect can be obtained.

In the present invention, the same effect is obtained even when the intake port member and the exhaust valve pressing member are integrally formed.

In the present invention, the same effect is obtained even in the case where "the suction port is arranged on the top panel so as to overlap the front end portion of the suction valve".

In the present invention, the exhaust side surface (50a) of the main body portion (50) of the top panel (5) is formed "toward the air intake port (51), and the thickness is inclined to be thinner, and it is connected to the air intake port (51). The suction valve pressing portion (52) having a recessed shape is provided, and the suction valve member is provided with "a flat body portion positioned in close contact with the exhaust side surface (50a) and positioned on the top panel (5)". In addition, an intake valve (62) composed of a reed valve is integrally provided on the intake valve member so as to overlap the intake port (51) and the intake valve pressing portion (52) of the top panel (5). Therefore, for the pump chamber inside of the top panel (5), that is, the surface (50b) on the suction side, the minimum required holes (such as the suction port (51), The surface other than the air port (53)) is set as a flat surface. In this way, the "structure for pressing the air intake valve (62)" can be provided within the range of the thickness (material thickness) of the top panel (5). In order to reduce the invalid space in the pump room.

As a result, according to the present invention, the compression ratio can be increased and the flow rate in the intermediate pressure zone can be increased. The pump head can be thinned, so that the weight of the pump can be reduced.

In addition, in the present invention, a concave-shaped suction valve pressing portion (52) is formed on the body portion (50) of the top panel (5), and the suction valve (62) is integrally provided on the body portion of the suction valve member. The exhaust valve (64) is integrally provided on the body portion of the exhaust valve member, and the exhaust valve pressing portion (73) is integrally provided on the body portion of the exhaust valve pressing member. Since the valve and the valve pressing member are completely free of screws, Because it is provided, the number of screws can be reduced and assembly steps such as tightening screws can be simplified, so that cost reduction can be achieved.

Moreover, since the suction valve pressing portion (52) is formed on the main body portion (50) of the top panel (5), the number of parts can be reduced compared to the case where the aforementioned members are independent members, thereby reducing the number of parts. The number and simplifies the assembly steps, so that cost reduction can be achieved even further.

In the present invention, when the intake valve member and the exhaust valve member are integrally formed (for example, the intake and exhaust valve member 6 described later), the number of parts can be reduced compared to the case where the aforementioned members are independent members. This reduces the number of parts and simplifies the assembly steps, thus achieving further cost reduction.

In the present invention, when the intake port member and the exhaust valve pressing member are integrally formed (for example, the exhaust valve pressing member 7 to be described later), the number can be reduced by one compared with the case where the aforementioned members are independent members. The number of parts reduces the number of parts and simplifies the assembly steps, thereby further reducing costs.

In the present invention, in the case where "the suction port (51) is arranged on the top panel (5) so as to overlap the front end portion of the suction valve (62)", Since the front end portion does not contact the main body portion (50) of the top panel (5), it is possible to prevent the front end of one of the failure modes of the suction valve (62) from rupturing and improve durability. In addition, noise can be reduced.

1‧‧‧ pump

2‧‧‧pump room

3‧‧‧Piston

5‧‧‧Top panel

6‧‧‧ Suction and exhaust valve components

7‧‧‧Exhaust valve pressing member

7a‧‧‧ Suction port member

50‧‧‧ Top panel body

50a‧‧‧Exhaust side

50b‧‧‧inspiratory side

51‧‧‧ Suction port

52‧‧‧suction valve pressing part

53‧‧‧Exhaust valve

60‧‧‧ Main body of suction and exhaust valve member

60a‧‧‧Exhaust side

60b‧‧‧inspiratory side

62‧‧‧ Suction valve

64‧‧‧ exhaust valve

70‧‧‧ body part of exhaust valve pressing member

70a‧‧‧Exhaust side

70b‧‧‧inspiratory side

71‧‧‧Inhalation hole

72‧‧‧Exhaust hole

73‧‧‧Exhaust valve pressing part

FIG. 1 is a diagram showing the main structure of a pump according to an embodiment of the present invention Exploded perspective view.

Figures 2 (a) ~ (c): shows the structure of the top panel in this embodiment, where Figure 2 (a) is a perspective view, and Figure 2 (b) is from the exhaust side 50a side (Figure 2) (a) The top view seen from the direction of arrow A in the middle), and FIG. 2 (c) is the top view seen from the suction side 50b side (the direction of arrow B in FIG. 2 (a)).

Figures 3 (a) and (b): shows the structure of the suction and exhaust valve member in this embodiment, wherein Figure 3 (a) is a perspective view, and Figure 3 (b) is from the exhaust side 60a side ( A plan view as viewed in the direction of the arrow A in FIG. 3 (a).

Figures 4 (a) and (b): shows the positional relationship between the top panel 5 and each part of the suction and exhaust valve member 6 in this embodiment, wherein Figure 4 (a) is a perspective view, and Figure 4 (b ) Is a plan view as viewed from the suction side 50a side (the arrow B direction side in FIG. 4 (a)).

5 (a) and 5 (b) show the dimensions between the intake valve 62 of the intake and exhaust valve member 6 and the intake valve pressing portion 52 and the intake port 51 of the top panel 5 in this embodiment. Illustrative diagram of the relationship.

6 (a) and 6 (b) are diagrams showing the structure of the exhaust valve pressing member 7 in this embodiment, in which FIG. 6 (a) is a perspective view, and FIG. 6 (b) is an exhaust side 70a side (A side in the direction of arrow A in Fig. 6 (a)).

7 (a) and 7 (b) are diagrams showing the positional relationship between each part of the suction and exhaust valve member 6 and the exhaust valve pressing member 7 in this embodiment. FIG. 7 (a) is a perspective view, and FIG. Figure (b) is from the exhaust side 70a side (A side in the direction of the arrow A in Fig. 7 (a)).

FIG. 8 is a perspective view showing the positional relationship between the top panel 5 and the respective parts of the intake and exhaust valve member 6 and the exhaust valve pressing member 7.

9 (a) and 9 (b) are sectional views showing the structure of the pump valve in this embodiment. FIG. 9 (a) shows a case where the piston portion 3 is located at the top dead center position, and FIG. 9 (b ) Is located at the bottom dead center position.

Fig. 10 is an exploded perspective view showing a structure of a main part of a pump of the conventional technology.

11 (a) and 11 (b) are cross-sectional views showing the structure of a pump valve in the conventional technology, where FIG. 11 (a) is a case where the piston portion 103 is located at the top dead center position, and FIG. 11 (b ) Is located at the bottom dead center position.

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 structure of a main part of an embodiment of a pump according to the present invention.

As shown in FIG. 1, the pump 1 according to the present embodiment is provided with a head cover 1 b on an upper portion of the driving portion 1 a (the driving source is omitted in the figure), and the following components are arranged in the head cover 1 b.

A pump chamber 2 is provided on the upper part of the driving portion 1a, and is formed in the pump chamber 2 by inserting a piston portion "reciprocating by locking an eccentric shaft of a motor not shown in the drawing" 3.

"The piston part 3 can be sealed while sliding" The cup-shaped gasket 3 b and the cup-shaped gasket pressing plate 3 c are locked and fixed to the connecting rod 3 a to constitute the piston portion 3.

In addition, a top panel 5 is attached to an upper portion (head) of the pump chamber 2 via a cylinder gasket 4.

On the exhaust side surface 50a of the top panel 5 (refer to Figs. 2 (a) and (b)), an intake and exhaust valve member 6 and an exhaust valve pressing member 7 are provided in this order, and the exhaust valve pressing member 7 A head gasket 8 is provided thereon.

Figures 2 (a) to (c) show the structure of the top panel 5 in this embodiment, where Figure 2 (a) is a perspective view, and Figure 2 (b) is from the side 50a of the exhaust side (second A plan view viewed from the arrow A direction side in FIG. (A), and a second view (c) is a plan view viewed from the suction side 50b side (the arrow B direction side in FIG. 2 (a)).

As shown in Figs. 2 (a) to (c), the top panel 5 of this embodiment is formed by, for example, an aluminum die casting, and has a main body portion 50 having a thickness such as a disc shape, for example. . The exhaust side surface 50a of the main body portion 50 has a high sealing performance when the flatness of the entire surface is ensured, and the surface is in close contact with the flat plate.

The body portion 50 is provided with two intake ports 51 and an intake valve pressing portion 52. In the present invention, the number of the above-mentioned intake ports 51 and intake valve pressing portions 52 is not limited to two, and may be any number.

In the case of this embodiment, the air inlet 51 is formed in a semicircular shape through the main body portion 50.

In addition, the intake valve pressing portion 52 is inclined toward a straight portion of the intake port 51 to have a thin thickness, for example, flat, and is formed in a recessed shape integrally with the edge portion of the linear portion of the intake port 51.

In the case of the present invention, the suction valve pressing portion 52 may be curved or may be formed in a spherical shape.

The intake valve pressing portion 52 corresponds to an intake valve 62 described later.

On the suction side 50b of the main body portion 50, the portion corresponding to the suction valve pressing portion 52 (the portion shown in Fig. 52b in Fig. 2 (c)) and other portions are not provided with "concavities and convexities that become an invalid space." ", But formed a flat shape.

Exhaust ports 53 are provided at specific positions of the main body portion 50.

The two suction ports 53 described above are formed into a circular shape, for example, penetrating through the body portion 50.

In addition, a plurality of (two in this embodiment) positioning pins 54 are provided on the edge of the exhaust side surface 50 a of the main body portion 50.

Figures 3 (a) and (b) show the structure of the intake and exhaust valve member 6 in this embodiment. Figure 3 (a) is a perspective view, and Figure 3 (b) is a view from the exhaust side 60a side ( A plan view as viewed in the direction of the arrow A in FIG. 3 (a).

As shown in FIGS. 3 (a) and (b), the intake and exhaust valve member 6 of the present embodiment is a member that integrates the intake valve member and the exhaust valve member in the present invention.

The intake / exhaust valve member 6 is made of, for example, stainless steel, and has a thin plate-shaped body portion 60 having the same shape as the body portion 50 of the top plate 5 with a thinner thickness than the top plate 5.

Here, a plurality of (two in the present embodiment) positioning holes 65 are provided at the edge portion of the main body portion 60.

These positioning holes 65 are provided at the same intervals as the positioning pins 54 for fitting with the positioning pins 54 of the top panel 5.

Next, in addition to the fitting of the positioning pin 54 of the top panel 5 and the positioning hole 65 of the intake / exhaust valve member 6, the main body portion 50 of the top panel 5 and the main body portion 60 of the intake / exhaust valve member 6 are configured. The outer peripheral portion of the flat surface is formed to ensure a positioning accuracy between the suction valve 62 described below and the suction valve pressing portion 52 of the top panel 5.

The body portion 60 of the suction / exhaust valve member 6 includes, for example, two "slim tongue-shaped (reed valve-shaped)" suction valves 62 provided integrally with the body portion 60 by forming a notch 61.

As described later, the intake valves 62 are provided so as to correspond to the intake valve pressing portions 52 of the top panel 5, respectively.

In addition, the body portion 60 of the suction and exhaust valve member 6 is provided with two "slender tongue-like (reed valve-like)" exhaust valves 64 by forming a notch 63, for example.

Figures 4 (a) and (b) show the positional relationship between the top panel 5 and each part of the suction and exhaust valve member 6 in this embodiment. Figure 4 (a) is a perspective view and Figure 4 (b) From the suction side 50a side (The arrow B direction side in FIG. 4 (a)).

As shown in FIGS. 4 (a) and 4 (b), in the present embodiment, the positioning pin 54 of the top panel 5 and the positioning hole 65 of the suction and exhaust valve member 6 are fitted to each other to make the suction and exhaust The valve member 6 is in close contact with the exhaust side surface 50 a of the top panel 5 to form a positioning arrangement.

Next, in this state, 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 panel 5 overlap each other, and the exhaust of the intake / exhaust valve member 6 is configured. The valve 64 overlaps the exhaust port 53 of the top panel 5.

In this case, as shown in FIG. 4 (b), the intake valve 62 of the intake and exhaust valve member 6 is formed to have a narrower width than the intake valve pressing portion 52 and the intake port 51 of the top panel 5. The front end portion of the air valve 62 overlaps the air inlet 51 of the top panel 5, and the air valve 62 determines the air inlet valve 62 of the air inlet and outlet valve member 6 without being in contact with the edge portion of the curved portion of the air inlet 51. Size (size), location and shape.

In addition, the exhaust valve 64 of the suction and exhaust valve member 6 determines the size (size), position, and shape of the exhaust valve 64 of the suction and exhaust valve member 6 on the premise that the exhaust port 53 of the top panel 5 is covered. .

5 (a) and 5 (b) show the dimensional relationship between the intake valve 62 of the intake and exhaust valve member 6 and the intake valve pressing portion 52 and the intake port 51 of the top panel 5 in this embodiment. Illustration.

As shown in FIGS. 1 and 5 (a) and (b), in the present embodiment, the suction valve 62 of the suction and discharge valve member 6 is attracted to the pump in accordance with the suction operation of the pump 1. The suction side 50b side of the top panel 5 of the chamber 2 and The suction valve pressing portion 52 which is in contact with the top panel 5 is configured to be in close contact.

In this embodiment, in order to prevent the front end portion 62a of the intake valve 62 from protruding from the intake port 51 of the top panel 5 to the intake side 50b in the state shown in FIG. 5 (b), the following is set Dimensions: the length L of the front end portion 62a of the suction valve 62 shown in FIG. 5 (a), the inclination angle θ of the suction valve pressing portion 52 of the top panel 5, and the edge portion of the suction port 51 of the top panel 5 The thickness T of 51a.

Specifically, in the case where the suction valve pressing portion 52 of the top panel 5 is flat, in order to form L. Sinθ <T, and set the following dimensions: the length L of the front end portion 62a of the intake valve 62, the inclination angle θ of the intake valve pressing portion 52 of the top panel 5, the edge portion 51a of the intake port 51 of the top panel 5 Thickness T.

6 (a) and 6 (b) show the structure of the intake and exhaust valve member 7 in the present embodiment, wherein FIG. 6 (a) is a perspective view, and FIG. 6 (b) is an exhaust side 70a side ( A plan view as viewed from the direction of arrow A in FIG. 6 (a).

As shown in FIGS. 6 (a) and (b), the exhaust valve pressing member 7 of this embodiment is a member that integrates the intake port member and the exhaust valve pressing member in the present invention. Specifically, As will be described later, the intake hole portion 71 is provided in the body portion 70 of the exhaust valve pressing member 7.

The intake / exhaust valve member 7 of this embodiment is formed of, for example, an aluminum alloy plate, and has a circular plate-shaped body portion 70 having a specific thickness, for example, the same shape as the body portion 50 of the top plate 5.

Here, a plurality of (two in the present embodiment) positioning holes 74 are provided at the edge portion of the main body portion 70.

These positioning holes 74 are provided at the same interval as the positioning pins 54 for fitting with the positioning pins 54 of the top panel 5.

Next, as shown in FIG. 8 later, in addition to the fitting of the positioning pin 54 of the top panel 5, the positioning hole 65 of the suction and exhaust valve member 6, and the positioning hole 74 of the exhaust valve pressing member 7, The “surrounding portion of the main body portion 50 of the top panel 5, the main body portion 60 of the suction and exhaust valve member 6, and the main portion 70 of the exhaust valve pressing member 7 forms a flat surface.” The positioning accuracy of the exhaust valve 64 of the member 6 and the exhaust valve pressing portion 73 of the exhaust valve pressing member 7 described below.

The body portion 70 of the exhaust valve pressing member 7 is provided with two through-body portions 70 and formed with, for example, a circular suction hole portion 71.

Further, in the body portion 70 of the exhaust valve member 7, for example, by cutting the body portion 70 and forming an exhaust hole portion 72, two "slender tongue-like (spring-shaped) springs are formed integrally with the body portion 70. Sheet valve shape) "of the exhaust valve pressing portion 73.

The exhaust valve pressing portion 73 is formed to bend toward the exhaust side surface 70a with the intake side surface 70b of the main body portion 70 as a fulcrum, and is provided so as to correspond to the exhaust of the exhaust valve member 6 as described later. Valve 64.

Figs. 7 (a) and 7 (b) show the positional relationship between each part of the suction and exhaust valve member 6 and the exhaust valve pressing member 7 in this embodiment. Fig. 7 (a) is a perspective view and Fig. 7 (b) is a plan view from the side 70a of the exhaust side (the direction of the arrow A in FIG. 7 (a)). Illustration.

As shown in FIGS. 7 (a) and 7 (b), in this embodiment, the positioning hole 65 of the suction and exhaust valve member 6 and the positioning hole 74 of the exhaust valve pressing member 7 overlap each other, The exhaust valve pressing member 7 is brought into close contact with the exhaust side surface 60 a of the body portion 60 of the intake and exhaust valve member 6 to form a positioning arrangement.

Next, in this state, the intake valve 62 of the intake / exhaust valve member 6 and the intake port 71 of the exhaust valve pressing member 7 are overlapped, and the exhaust valve 64 of the exhaust valve member 6 and The exhaust hole portion 72 and the exhaust valve pressing portion 73 of the exhaust valve pressing member 7 overlap each other.

In this case, as shown in FIG. 7 (b), it is determined on the premise that the intake hole portion 71 of the exhaust valve pressing member 7 is covered by the intake valve 62 of the exhaust valve member 6. The size (size) and position of the suction hole portion 71.

Conversely, the size (size) of the air intake valve 62 of the air intake and exhaust valve member 6 is set in order to fully seal the air intake hole portion 71 of this size in accordance with the flow rate of the pump 1 as a condition. .

In addition, as shown in FIG. 7 (b), the outer portion 72a of the exhaust hole portion 72 of the exhaust valve pressing member 7 is formed to be wider than the exhaust valve 64 of the exhaust valve member 6.

FIG. 8 is a perspective view showing the positional relationship between the top panel 5 and the respective parts of the intake and exhaust valve member 6 and the exhaust valve pressing member 7.

In addition, Figs. 9 (a) and (b) are cross-sectional views showing the structure of the pump valve in this embodiment, and Fig. 9 (a) shows the piston portion on the upper side. In the case of the dead center position, Fig. 9 (b) shows the case where the lower center position is located.

In the present embodiment having the above-mentioned structure, once the piston portion 3 is moved to the bottom dead center side, the suction valve 62 of the suction and exhaust valve member 6 is bent toward the exhaust side 50a side of the top panel 5 to exhaust the air. The suction hole portion 71 of the valve pressing member 7 is opened, and the suction valve 62 of the suction and exhaust valve member 6 is brought into close contact with the suction valve pressing portion 52 of the exhaust side surface 50 a of the top panel 5.

In this state, as shown in FIGS. 4 (b) and 5 (b), there is a gap between the intake valve 62 of the intake and exhaust valve member 6 and the intake port 51 of the top panel 5, so that The gas is introduced into the pumping chamber 2 through the suction hole portion 71 of the exhaust valve pressing member 7, the cutout portion 61 of the suction and exhaust valve member 6, and the suction port 51 of the top panel 5.

At the same time, since the exhaust valve 64 of the suction and exhaust valve member 6 is in close contact with the exhaust side surface 50 a of the body portion 50 of the top panel 5, and the exhaust port 53 of the top panel 5 is closed by the exhaust valve 64, The gas is introduced into the pump chamber 2 through the exhaust port 53.

In addition, when the piston portion 3 is moved to the top dead center side, the exhaust valve 64 of the suction and exhaust valve member 6 is bent toward the exhaust valve pressing members 7 and 70b, so that the exhaust port 53 of the top panel 5 is opened, and The exhaust valve 64 of the suction and exhaust valve member 6 is brought into close contact with the exhaust valve pressing portion 73 on the side of the exhaust valve pressing members 7, 70b.

In this way, the gas is discharged to the outside of the pump chamber 2 through the exhaust port 53 of the top panel 5, the cutout portion 63 of the intake and exhaust valve member 6, and the exhaust hole portion 72 of the exhaust valve pressing member 7.

At the same time, since the intake valve 62 of the exhaust valve member 6 is in close contact with the intake side 70b of the body portion 70 of the exhaust valve pressing member 7, the suction of the exhaust valve pressing member 7 is closed by the intake valve 62. Since the air hole portion 71 does not allow the gas to be sucked into the pump chamber 2 through the air suction hole portion 71.

By repeating the above-mentioned operations, desired intake and exhaust can be performed.

As described above, in the present embodiment, the exhaust side surface 50 a of the main body portion 50 of the top panel 5 is formed to be “inclined toward the air intake port 51, the thickness of which is thinner and inclined, and it is connected to the air intake port 51 and has a concave shape. The intake valve pressing portion 52 is provided with the intake and exhaust valve member 6 "having a flat plate-shaped body portion 60 positioned in close contact with the exhaust side surface 50a and positioned on the top panel 5", and the intake and exhaust valve The suction valve 62 of the member 6 is integrally provided on the main body portion 50 so as to overlap with the suction port 51 and the suction valve pressing portion 52 of the top panel 5, so that the inside of the pump chamber 2 of the top panel 5 is, Refers to the air intake side 50b, which can form a plane other than the minimum required holes (intake port 51, exhaust port 53). In this way, since it can be in the range of the thickness (material thickness) of the top panel 5 "Structure for pressing the suction valve 62" is installed inside, so as shown in Figs. 9 (a) and (b) and Fig. 11 (a) and (b), the pump can be greatly reduced compared with the conventional technology Ineffective space in room 2.

As a result, according to the present embodiment, the compression ratio can be increased and the flow rate in the intermediate pressure zone can be increased. The pump head can be thinned, so that the weight of the pump can be reduced.

In addition, in the embodiment, a top panel including a “recessed suction valve pressing portion 52 formed in the main body portion 50” which can be positioned separately is provided. 5. The suction valve member 6 which is provided integrally with the intake valve 62 and the exhaust valve 64 in the main body portion 60, and the exhaust valve pressing unit where the exhaust valve pressing portion 73 is integrally provided in the main body portion 70. The member 7 and the valve and the valve pressing member are provided without using screws at all, so the screws can be reduced and assembly steps such as tightening the screws can be simplified, thereby reducing costs.

Moreover, since the suction valve pressing portion 52 is formed on the main body portion 50 of the top panel 5, the number of parts can be reduced compared to the case where the aforementioned members are independent members, which can reduce the number of parts and simplify the assembly steps. Therefore, cost reduction can be achieved even further.

In addition, in this embodiment, the intake valve 62 and the exhaust valve 64 are integrally provided on the body portion 60 of the intake and exhaust valve member 6, and the body portion 70 of the exhaust valve pressing member 7 is provided. Compared with the case where each of the components is an independent component, the suction hole portion 71 can reduce the number of parts by one, which can reduce the number of parts and simplify the assembly steps, and thus can further reduce the cost.

Moreover, in the embodiment, the suction port 51 is arranged on the top panel 5 so as to overlap the front end portion of the suction valve 62. Therefore, when the valve is opened and closed, the front end portion of the suction valve 62 does not overlap with the body of the top panel 5. Since the portion 50 is in contact, it is possible to prevent the front end of one of the failure modes of the intake valve 62 from being broken, and to improve durability. In addition, noise can be reduced.

However, the present invention is not limited to the above-mentioned embodiments, and various changes can be made.

For example, although the structure in which the intake valve 62 and the exhaust valve 64 are respectively provided in the above-mentioned embodiment is adopted, the present invention The number of the air valve 62 and the exhaust valve 64 is not limited to this.

In addition, in the above-mentioned embodiment, the intake valve 62 and the exhaust valve 64 are integrally provided in the main body portion 60 of the intake and exhaust valve member 6, but the present invention is not limited to this, and the intake may be provided separately. Air valve member and exhaust valve member.

However, from the viewpoint of reducing the number of parts, it is preferable that the intake valve 62 and the exhaust valve 64 are integrally provided in the main body portion 60 of the intake / exhaust valve member 6 as in the embodiment described above.

In addition, although the intake hole portion 71, the exhaust hole portion 72, and the exhaust valve pressing portion 73 are integrally provided in the body portion 70 of the exhaust valve pressing member 7, the present invention is not limited to this, and may be There are separately provided an intake port member having an intake hole portion, and an exhaust valve pressing member having an exhaust hole portion and an exhaust valve pressing portion.

However, from the viewpoint of reducing the number of parts, it is preferable to integrally provide the intake hole portion 71, the exhaust hole portion 72, and the exhaust gas in the body portion 70 of the exhaust valve pressing member 7 as in the embodiment described above.阀 压 部 73。 Valve pressing portion 73.

In addition, the present invention is not limited to the piston pump of the above embodiment as long as it is a "volume transfer pump having an exhaust valve formed by a reed valve and capable of changing the volume in the pump chamber". Suitable for various pumps such as bellows pumps, diaphragm pumps, rotary pumps, etc.

Claims (3)

A pump is a pump in which an intake valve and an exhaust valve composed of a reed valve are arranged on the head of a pump chamber and the volume of the pump chamber is changed. The pump is characterized by having a top plate, The top panel is disposed on the head of the pump chamber, and has a flat plate-shaped body portion having an air inlet and an air outlet, and an exhaust side surface of the body portion having an air inlet facing the air inlet. The suction valve pressing portion having a concave shape is formed so as to be reduced in thickness and connected to the suction port; and the suction valve member has a flat plate-shaped body portion which is closely attached to the exhaust gas. The side panel is positioned on the top panel, and the main body part and the suction port and the suction valve pressing part of the top panel are overlapped with each other, and the suction valve is integrated with the main body part; and an exhaust valve member, The exhaust valve member has a flat plate-shaped body portion, which is positioned on the top panel in close contact with the exhaust side, and the body portion and the exhaust port of the top panel overlap each other to form the exhaust valve. Integrated with the body portion; and a suction port member, The intake port member has a flat plate-shaped body portion which is positioned close to the exhaust side and is positioned on the intake valve member, and an intake hole is provided on the body portion so as to overlap the intake valve. And an exhaust valve pressing member, the exhaust valve pressing member having a flat plate-shaped body portion, the body portion being positioned close to the exhaust side and arranged on the exhaust valve member, and on the body portion, the exhaust valve pressing member The air valve is provided with an exhaust hole portion, and the exhaust valve pressing portion is integrated with the main body portion so as to overlap the exhaust valve. The front end portion of the intake valve is connected to the air inlet of the top panel. It overlaps with each other and does not make contact with the edge of the suction port, and is configured not to protrude from the suction port of the top panel to the suction side. According to the pump described in claim 1, the suction valve member and the exhaust valve member are integrally formed. According to the pump described in claim 1, the suction port member and the exhaust valve pressing member are integrally formed.