阅读说明：本技术 柱塞泵 (Plunger pump ) 是由 王东晖 于 2020-10-10 设计创作，主要内容包括：本发明涉及一种柱塞泵,该柱塞泵包括：马达；附接到所述马达的支架；固定到所述支架的保持构件；在轴向方向上延伸的柱塞；泵头,所述泵头保持所述柱塞,使得所述柱塞能够在所述轴向方向上旋转和往复运动；以及接头机构,所述接头机构用于将所述马达的旋转转换成所述柱塞的旋转和往复运动,其中,所述保持构件包括各自形成为平板形状的第一板构件和第二板构件,并且所述第一板构件和所述第二板构件彼此平行以将所述泵头夹在中间。(The present invention relates to a plunger pump comprising: a motor; a bracket attached to the motor; a retaining member secured to the bracket; a plunger extending in an axial direction; a pump head holding the plunger such that the plunger is rotatable and reciprocatable in the axial direction; and a joint mechanism for converting rotation of the motor into rotation and reciprocation of the plunger, wherein the holding member includes a first plate member and a second plate member each formed in a flat plate shape, and the first plate member and the second plate member are parallel to each other to sandwich the pump head.)

1. A plunger pump, comprising:

a motor;

a bracket attached to the motor;

a retaining member secured to the bracket;

a plunger extending in an axial direction;

a pump head holding the plunger such that the plunger is rotatable and reciprocatable in the axial direction; and

a joint mechanism for converting rotation of the motor into rotation and reciprocation of the plunger,

wherein the holding member includes a first plate member and a second plate member each formed in a flat plate shape, and

the first and second plate members are parallel to each other to sandwich the pump head.

2. The plunger pump of claim 1,

the first and second plate members are fixed to the pump head by first and second fixing members, respectively, and

the second fixing member is located between the distal end of the pump head and the first fixing member.

3. The plunger pump according to claim 1 or 2, wherein the pump head comprises a pump bracket made of synthetic resin.

4. The plunger pump of claim 3,

the pump holder includes a suction nozzle and a discharge nozzle formed integrally with the pump holder, and

the outer surface of the suction nozzle and the outer surface of the discharge nozzle are each formed with a male screw portion.

Technical Field

The present invention relates to a plunger pump.

Background

Patent document 1 describes a plunger pump including a front frame to which a pump head is fixed.

[ Prior art documents ]

[ patent document ]

[ patent document 1] Japanese patent No.5981669

Disclosure of Invention

[ problem to be solved by the invention ]

The front frame is formed by bending a single metal plate member. The flange of the pump head is secured to the distal surface of the front frame. In the case where the dimensional accuracy deteriorates, the vibration of the pump head may increase. Therefore, for the front frame having such a shape, the bending process is preferably performed with good dimensional accuracy, but this may increase the manufacturing cost.

It is therefore an object of the present invention to provide a plunger pump with reduced manufacturing costs.

[ means for solving problems ]

The above object is achieved by a plunger pump comprising: a motor; a bracket attached to the motor; a retaining member secured to the bracket; a plunger extending in an axial direction; a pump head holding the plunger such that the plunger is rotatable and reciprocatable in the axial direction; and a joint mechanism for converting rotation of the motor into rotation and reciprocation of the plunger, wherein the holding member includes a first plate member and a second plate member each formed in a flat plate shape, and the first plate member and the second plate member are parallel to each other to sandwich the pump head.

[ Effect of the invention ]

According to the present invention, a plunger pump with reduced manufacturing costs can be provided.

Drawings

FIG. 1 is an external view of a plunger pump;

FIG. 2 is an external view of the plunger pump;

FIG. 3 is an external view of the plunger pump;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 3; and

fig. 5 is a view of only the plate member.

Detailed Description

Fig. 1 to 3 are external views of the plunger pump 1. Fig. 4 is a cross-sectional view taken along line a-a of fig. 3. The plunger pump 1 includes a motor 10, a bracket 20, a plate member 30, a joint mechanism 40, a plunger 50, a nut 60, and a pump head 70. The bracket 20 is fixed to an outer surface of the motor 10 from which the rotational shaft 12 thereof protrudes. The holder 20 includes: a fixing plate portion 22 fixed to an outer surface of the motor 10; and two connecting wall portions 24 that protrude from the fixed plate portion 22 toward the distal end side of the rotary shaft 12 of the motor 10 and are parallel to each other. Proximal end portions of the two plate members 30 are fixed to the two connecting wall portions 24, respectively. The pump head 70 is held by the distal ends of the two connecting wall portions 24.

The plate member 30 is fixed to the connecting wall portion 24 so as to adjust the angular position of the plate member 30 relative to the connecting wall portion 24. Specifically, the plate member 30 is fixed to overlap with the connecting wall portion 24 by socket head cap screws (hereinafter referred to as bolts) B1 and B2. The receiving hole 25 formed in the connecting wall portion 24 through which the bolt B1 passes is formed in an arc shape. The center of the arc is a screw hole formed in the connecting wall portion 24 through which the bolt B2 passes. On the other hand, the plate member 30 is formed with screw holes 35 and 36 to which bolts B1 and B2 are screwed, respectively. Bolt B1 can secure panel member 30 in any angular position within arcuate receiving bore 25. Thus, the plate member 30 is fixed to the connecting wall portion 24 at an adjustable angular position within the range of the receiving hole 25 around the bolt B2.

As shown in fig. 4, a joint mechanism 40 is fixed to the distal end of the rotary shaft 12 protruding from the motor 10. The joint mechanism 40 connects the distal end of the rotary shaft 12 and the proximal end of the plunger 50, so that the rotary motion of the rotary shaft 12 is converted into the rotary motion of the plunger 50 and the reciprocating linear motion of the plunger 50 in the axial direction. The plunger 50 performs a reciprocating linear motion while rotating. Specifically, the joint mechanism 40 includes a spherical bearing 41, a pin 42, and a sleeve 43. The spherical bearing 41 holds the proximal end of the pin 42 such that the pin 42 pivots on its proximal end. The distal end of pin 42 is connected to the proximal end of plunger 50 via sleeve 43. When the joint mechanism 40 rotates, the spherical bearing 41 rotates about the axis of the rotary shaft 12, and the pin 42 pivots. In response to this, since the axial direction of the plunger 50 is inclined with respect to the axial direction of the rotary shaft 12, the plunger 50 linearly reciprocates while rotating. The spherical bearing 41, the pin 42, and the sleeve 43 are made of metal, but are not limited thereto. The plunger 50 is rotated only in a posture in which the axial direction of the rotary shaft 12 is the same as the axial direction of the plunger 50. The plunger 50 is made of, for example, ceramic, but is not limited thereto.

The pump head 70 includes a pump bracket 71 and a cylinder 78 held within the pump bracket 71. The cylinder 78 has a cylindrical shape, and is fitted into a cylindrical inner surface formed in the pump mount 71. The proximal end of the pump holder 71 is screwed together with the nut 60 to prevent liquid from leaking from the gap between the pump holder 71 and the cylinder 78. The distal end of the plunger 50 is inserted into the cylinder 78 via the nut 60. The plunger 50 linearly reciprocates while rotating within the cylinder 78. The cylinder chamber S is defined by the distal end of the pump bracket 71, the inside of the cylinder 78, and the distal end of the plunger 50. The internal volume of the cylinder chamber S increases or decreases in response to the linear reciprocating motion of the plunger 50. A cutting surface, not shown, is provided on the outer surface of the plunger 50 distally within the cylinder 78. The cutting surface having a predetermined length in the axial direction is grooved in a half range in the circumferential direction. The cutting surface is spaced from the inner surface of the cylinder 78. A predetermined clearance is ensured between the cutting surface and the inner surface of the cylinder 78. The gap and the cylinder chamber S communicate with each other.

The suction nozzle 73a and the inlet nozzle 75a are formed on one of the two sides of the pump bracket 71 that are not sandwiched by the two plate members 30. The discharge nozzle 73b and the outlet nozzle 75b are formed on the other of the two sides of the pump bracket 71 not sandwiched by the two plate members 30. The suction nozzle 73a and the discharge nozzle 73b are located close to the distal side, but the inlet nozzle 75a and the outlet nozzle 75b are located far from the distal side. The suction nozzle 73a, the discharge nozzle 73b, the inlet nozzle 75a, and the outlet nozzle 75b each have a flow path communicating to the inside of the cylinder 78 through the pump bracket 71. When the plunger 50 linearly reciprocates while rotating, a flow path of the suction nozzle 73a and a flow path of the discharge nozzle 73b are alternately communicated to the cylinder chamber S through the cutting surface, and the volume of the cylinder chamber S increases and decreases. Accordingly, the liquid introduced from the suction nozzle 73a is discharged from the discharge nozzle 73b through the cylinder chamber S. An inlet nozzle 75a and an outlet nozzle 75b are provided for introducing and discharging the cleaning liquid from the interior.

Here, the pump bracket 71 of the pump head 70 is made of synthetic resin. Therefore, compared to the case where the pump bracket 71 is made of metal, the manufacturing cost is reduced and the weight is reduced. The pump bracket 71 is integrally formed with the suction nozzle 73a, the discharge nozzle 73b, the inlet nozzle 75a, and the outlet nozzle 75 b. Male screw portions are formed around the circumferences of the suction nozzle 73a and the discharge nozzle 73b, respectively. The male screw portion of the suction nozzle 73a is screwed with the female screw portion of the pipe for supplying liquid. The male screw portion of the discharge nozzle 73b is screwed with the female screw portion of the pipe for discharging the liquid. The male screw portions of the suction nozzle 73a and the discharge nozzle 73b are also made of synthetic resin. This reduces the manufacturing cost, compared to the case where the male screw portion is made of metal, for example, as described above. The cylinder 78 is also made of synthetic resin, but may be made of metal.

Next, the plate member 30 will be described. Fig. 5 is a view of only the plate member 30. The plate member 30 is formed in a flat plate shape, and the bending process is not performed in the plate member 30. Therefore, the manufacturing cost is reduced as compared with a plate member subjected to bending processing. The two plate members 30 are examples of holding members, and are examples of a first plate member and a second plate member.

As shown in fig. 1 and 5, bolts B7 and B8 for fixing the plate member 30 to the pump bracket 71 of the pump head 70 are screwed into the screw holes 37 and 38, respectively. Here, the screw holes 37 and 38 are aligned in the axial direction of the plunger 50. Accordingly, bolt B8 is near the distal end of pump head 70, to which bolt B7 is not near. In other words, bolt B8 is located between the distal end and bolt B7. Thus, the two plate members 30 are held proximal to pump head 70 with bolt B7 and distal to pump head 70 with bolt B8. This dampens the pump head 70 from vibrating proximally and distally in response to the actuation of the plunger 50. Bolts B7 and B8 are examples of the first fixing member and the second fixing member, respectively. The first fixing member and the second fixing member are not limited thereto, and may be screws.

Although the exemplary embodiments of the present invention have been illustrated in detail, the present invention is not limited to the above-described embodiments, and other embodiments, modifications, and changes may be made without departing from the scope of the present invention.