JP2006144661A - Piston pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a very small size piston pump excellent in isolation of vibration and noise including a pump main body having a reciprocating piston member built therein. <P>SOLUTION: The piston pump 1 including the pump main body 10 having the reciprocating piston member built therein is provided with support rods 50, 60 provided on the pump main body to project outward from the pump main body 10 and a fixing member fixing a part where the support rods 50, 60 abut by the support rods 50, 60 formed out of a vibration damping member 81. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a piston pump.

  Conventionally, in a piston pump (also referred to as a plunger pump) including a pump body in which a reciprocating piston member is built, there is a problem that vibration and sound are generated by the reciprocating motion of the piston member. In order to solve such a problem, a vibration-proof and sound-proof structure in which a vibration damping member such as rubber is interposed between the piston pump and the ground surface of the piston pump so that the vibration is hardly transmitted to the surroundings. (See Patent Document 1).

  On the other hand, some of the above-described piston pumps are used for the purpose of supplying cooling water to remove heat generated from electronic equipment or supplying fuel to a fuel cell. Since the piston pump used for such a purpose is built in an electronic device or the like, it is configured as small as possible.

Therefore, even in such a minimally configured piston pump, when the above-described vibration and soundproof structure is adopted for the purpose of vibration and soundproofing, the size of the piston pump itself is reduced by the interposed vibration damping member. The problem of becoming large was left. That is, the original purpose constituted as a very small piston pump cannot be achieved.
JP 2002-310460 A

  The present invention has been made in view of such circumstances, and is a piston pump configured to be ultra-compact including a pump main body in which a reciprocating piston member is incorporated, and is excellent in vibration and soundproofing. The purpose is to provide.

In order to solve the above problems, the present invention provides a piston pump having the following means.
The piston pump according to the present invention is a piston pump including a pump body in which a reciprocating piston member is incorporated, and a support rod provided on the pump body so as to protrude outward from the pump body, and the support A portion abutting on the rod is formed of a damping member, and a fixing member for fixing the support rod is provided.

  In the piston pump according to the present invention, the portion that comes into contact with the support rod protruding from the pump body is fixed by a fixing member formed of a damping member. The generated vibration is suppressed by the vibration control member that comes into contact with the support bar, and is difficult to be transmitted from the support bar to the fixed member. Therefore, according to this piston pump, the vibration generated by the reciprocation of the piston member built in the pump main body is difficult to be transmitted to the periphery of the pump main body, and as a result, the piston pump with an anti-vibration effect is obtained. It becomes.

  The piston pump according to the present invention is characterized in that the pump body is supported by the support rod so that the pump body floats in a hollow state.

  In the piston pump according to the present invention, since the pump main body is supported so as to float in the hollow, the pump main body is supported so as not to come into contact with anything other than the support rod provided in the pump main body. That is, the vibration generated by the reciprocation of the piston member built in the pump main body is not transmitted to other members that do not contact, but is transmitted only to the support rod provided in the pump main body. Therefore, according to this piston pump, the vibration generated by the reciprocation of the piston member built in the pump main body is difficult to be transmitted to the periphery of the pump main body, and as a result, an anti-vibration effect is obtained. It becomes a piston pump.

  The support rod is constituted by a pipe communicating with the pressure chamber of the pump body.

  In the piston pump according to the present invention, the support rod is constituted by a pipe and communicates with the pressure chamber of the pump body, so that a medium such as a fluid can be sucked into the pressure chamber of the pump body from the pipe, or The piston pump can discharge from the pump body to the pipe. Therefore, according to this piston pump, since at least one of the suction pipe and the discharge pipe, which is indispensable for the piston pump, is configured as the support rod, the support rod is not provided in the pump body, and the entire piston pump The bulk of can be reduced.

  The pipe is composed of two suction pipes and a discharge pipe, and the suction pipe and the discharge pipe are arranged so as to be orthogonal to each other.

  In the piston pump according to the present invention, as described above, the suction pipe and the discharge pipe, which are indispensable in configuring the piston pump, are configured as the support rods, so that it is not necessary to provide the support rods in the pump body. In addition, the bulk of the entire piston pump can be reduced. Furthermore, since the suction pipe and the discharge pipe that also serve as a support rod are arranged so as to be orthogonal to each other, the pump body is suitably fixed by a fixing member from the vertical direction and the horizontal direction. Therefore, according to this piston pump, the pump body is stably fixed with little vibration in the vertical and horizontal directions due to vibration.

  The discharge pipe is provided coaxially with a central axis of the piston member.

  In the piston pump according to the present invention, since the discharge pipe is provided coaxially with the central axis of the piston member in the reciprocating motion direction of the piston member, it is obtained by the piston motion of the piston member. The pressure can be used to discharge the fluid without waste. Therefore, the piston motion loss is reduced, and the piston pump can discharge the fluid suitably.

  The pump main body is covered with a casing, and a sound control unit is interposed between the pump main body and the casing.

  In the piston pump according to the present invention, the sound generated by the reciprocation of the piston member built in the pump body is insulated by the casing. Further, the generated sound is suitably suppressed by a sound suppression unit interposed between the housing and the pump body. Therefore, according to this piston pump, the sound generated by the reciprocation of the piston member built in the pump body is difficult to be transmitted to the periphery of the pump body, and as a result, the piston having a soundproofing effect is obtained. It becomes a pump.

  A motor unit including a rotation shaft, a central axis direction is parallel to the rotation axis direction of the motor unit, a piston unit provided adjacent to the motor unit, and engaged with the rotation shaft; A piston pump integrally connected to a power transmission unit for transmitting power to a piston member provided, and is connected to a pressure chamber of the piston unit and is coaxially arranged with a central axis of the piston unit. The discharge pipe and the suction pipe that is orthogonal to the discharge pipe and communicates with the pressure chamber of the piston portion are fixed by a fixing member via a damping member.

  In the piston pump according to the present invention, the motor part and the piston part are adjacent to each other so that the rotational axis direction of the motor part and the central axis direction of the piston part which is the reciprocating motion direction of the piston member are parallel to each other. Therefore, the motor part and the piston part are disposed without a useless space. And since the discharge pipe and the suction pipe communicated with the pressure chamber of the small-sized piston pump are fixed by the fixing member via the damping member, the vibration generated by the reciprocation of the piston member or the like is Since the vibration is suppressed by the vibration control member, the vibration is hardly transmitted to the fixed member. Therefore, according to this piston pump, it is configured to be extremely small, and vibration generated by the reciprocation of the piston member is difficult to be transmitted to the periphery of the pump body, and as a result, an anti-vibration effect is obtained. Piston pump.

  According to the piston pump of the present invention, it is possible to obtain a piston pump that is ultra-compact and includes a pump body that includes a reciprocating piston member.

  Hereinafter, the best embodiment of a piston pump according to the present invention will be described with reference to FIGS. 1 is a perspective view of a piston pump according to the present invention, FIG. 2 is a partially cutaway perspective view of a pump body provided with a suction pipe and a discharge pipe, and FIG. 3 is a top sectional view of the pump body of FIG. 4 is an exploded view when the pump body of FIG. 2 is covered with a casing, and FIG. 5 is a cross-sectional view of the pump body covered with the casing and a cross-sectional view of the fixing member.

  The piston pump 1 shown in FIG. 1 shows that a suction pipe 50 and a discharge pipe 60 provided in a pump body 10 covered with a housing are fixed to other members by a fixing member 80. First, the pump body 10 of the piston pump 1 will be described with reference to FIGS. The pump main body 10 shown in FIG. 1 is covered with a sound insulation housing 70 which will be described later.

The pump body 10 is formed by opening a suction port 11 through which the fluid F is sucked and a discharge port 12 through which the fluid F is discharged in directions orthogonal to each other. The motor part 20 which generate | occur | produces, the power transmission part 30 which transmits the motive power generated from the motor part 20, and the piston part 40 in which the piston member 45 which reciprocates with the motive power is incorporated is comprised.
The motor unit 20 and the piston unit 40 are disposed adjacent to each other so that the rotational axis direction and the central axis direction are parallel to each other. The power transmission unit 30 is disposed so that one side end of the motor unit 20 and one side end of the piston unit 40 are in contact with each other. As will be described later, the discharge pipe 60 is provided coaxially with the central axis of the piston portion 40, and the suction pipe 50 is in a direction orthogonal to the discharge pipe 60 and adjacent to the motor portion 20. It is provided on the opposite side. By arranging each part in this way, the pump body 10 can be configured to be ultra-small.

  The motor unit 20 is configured by housing an electric motor 22 in a motor housing case 21. A shaft gear 24 is provided on the outer periphery of the rotary shaft 23 provided in the electric motor 22, and the shaft gear 24 and a first gear 32 of the power transmission unit 30 described later mesh with each other. The rotational drive of the rotary shaft 23 is transmitted. The storage casing 21 is connected to a piston storage casing 41 of the piston portion 40 described later via pin members 25a and 25b.

  Next, the power transmission unit 30 that transmits the rotational drive of the rotary shaft 23 of the motor unit 20 will be described. The power transmission unit 30 includes a gear housing case 31, a first gear 32 whose end is pivotally supported at an appropriate position of the gear housing case 31 and meshing with the shaft gear 24, and the first gear 32. And a second gear 33 that rotates together with the second gear 33 and a third gear 34 that meshes with the second gear 33. Further, the third gear 34 is provided with a spiral guide portion 35 protruding from the side portion thereof and having a spiral groove 35a formed in the periphery thereof. Further, a reciprocating member 36 provided with a roller portion 36 a to be guided by being fitted in the concave groove 35 a is provided adjacent to the third gear 34. Reference numeral 37 denotes a guide shaft that supports the reciprocating motion of the reciprocating member 36.

  Accordingly, when the various gears 32, 33, and 34 described above are rotated, the spiral guide portion 35 is also rotated, and the roller portion 36a is guided in the groove 35a of the spiral guide portion 35 in the drawing. Move left and right. That is, the rotational drive of the various gears 32, 33, 34 is converted into the reciprocating motion of the reciprocating member 36. The reciprocating member 36 is configured such that an end portion in a direction in which the discharge pipe 60 is provided sandwiches a pressing plate 46 disposed at an end portion of a piston member 45 of the piston portion 40 described later. Therefore, according to the reciprocating motion of the reciprocating member 36, the piston member 45 is also reciprocated. The reciprocating member 34 is reciprocated by the roller portion 36a guided along the concave groove 35a. However, due to the restoring force of the bent flexible cylindrical portion 44 described later, It may be configured to return to the right side in the figure after being guided to the left end.

  Next, the piston part 40 will be described. The piston part 40 includes a piston member 45 in a piston housing case 41 having a working chamber 42 and a pressure chamber 43 that are communicated with each other through a communication hole 48. The piston member 45 is formed with a bowl-shaped flange portion 49 opened toward the discharge port 12. Further, the piston member 45 is formed with a bottom hole 49 a connected to the suction port 11 at a portion corresponding to the inner bottom of the flange portion 49. A stop ball 49b formed in a spherical shape is movably disposed in the flange 49. Reference numeral 49c denotes a stopper that prevents the stop ball 49b from falling off the collar.

  A piston auxiliary member 47 is screwed to the base end (right end in the figure) of the piston member 45. In addition, around the piston auxiliary member 47, there is provided a flexible cylindrical portion 44 having a cylindrical shape with both ends opened so as to cover the piston auxiliary member 47. The base end (right end in the figure) of the piston auxiliary member 47 is integrated with the pressing plate 46 via an inner flange 44a formed by projecting one end of the flexible cylindrical portion 44 in the radial direction. The screw member 46a is screwed together. Further, an outer flange 44b formed to project in the radial direction at the other end of the opening of the flexible cylindrical portion 44 is fixed to the piston housing case 41 by a stopper 48a. The flexible cylindrical portion 44 has a property of being restored to return to a normal cylindrical shape while having a flexible property. Therefore, as described above, the pressing plate 46 and the reciprocating member 34 to be connected are urged toward the power transmission unit 30 (the right direction in the drawing).

  The piston part 40 configured in this way moves as follows. That is, the stop ball 49 b is provided inside the flange 49 when the fluid F is discharged to the discharge port 12, that is, when the piston member 45 moves so as to approach the discharge port 12. It moves so as to close the bottom hole 49a. At the same time, the fluid F is sucked into the pressure chamber 43 from the suction port 11. Then, when the piston member 45 moves away from the discharge port 12, the stop ball 49b contacts and closes so as to close so that the fluid F moves into the flange portion 49. It moves away from the bottom hole 49a. A communication hole 49 c through which the fluid F can flow into the flange 49 is formed in the vicinity of the bottom hole 49 a of the flange 49 in the piston member 45.

  The discharge port 12 connected to the pressure chamber 43 is formed in the opening direction of the flange portion, whereas the suction port 11 connected to the pressure chamber 43 is formed in the lateral direction with respect to the flange portion 49. It is formed. Therefore, as the suction port 11 and the discharge port 12 are formed so as to be opened in directions orthogonal to each other, they are connected to the suction port 11 and the discharge port 12. The suction pipe 50 and the discharge pipe 60 formed in a tubular shape that can move F are provided in directions orthogonal to each other. The suction pipe 50 and the discharge pipe 60 correspond to the support rod in the present invention.

Next, the suction pipe 50 and the discharge pipe 60 connected to the suction port 11 and the discharge port 12 of the pump body 10 configured as described above will be described.
First, the suction pipe 50 will be described. The suction pipe 50 is attached to the suction port 11 of the pump body 10 so that the inside thereof communicates with the pressure chamber 43. Between the two, an attachment member 52 having both ends opened is interposed. Further, an O-ring 53 is interposed between the suction port 11 and the mounting member 52 and between the mounting member 52 and the suction pipe main body 51 for the purpose of improving adhesion. . The attachment member 52 is press-fitted into the suction port 11, and the suction pipe body 51 is also press-fitted into the attachment member 52.

  Next, the discharge pipe 60 will be described. Like the suction pipe 50, the discharge pipe 60 is attached to the discharge port 12 of the pump body 10 so that the inside communicates with the pressure chamber 43. Between the pipe main body 61, a discharge member 62 having both ends opened is interposed. The inside of the discharge member 62 opens to the discharge pipe 60 side like the flange portion 49 of the piston member 45 to form a mortar-shaped pot portion 63 and a stop ball 64 formed in a spherical shape. Are arranged to be movable. An opening hole 65 communicating with the discharge port 12 is formed in a portion corresponding to the bottom of the bowl portion 63 with a diameter smaller than the diameter of the retaining ball 64.

  Accordingly, when the fluid F is discharged to the discharge port 12, that is, when the piston member 45 moves so as to approach the discharge port 12, the stop ball 64 in the discharge member 62 is moved to the opening hole 65. It moves to the position spaced apart from the opening hole 65 so as to open. In addition, when the fluid F flows into the flange portion 49, that is, when the piston member 45 moves away from the discharge port 12, the stop ball 64 in the discharge member 62 has the opening hole 65. It moves to the position which contacts and closes the opening hole 65 so as to close. Further, an O-ring 66 is interposed between the discharge port 12 and the discharge member 62 and between the discharge member 62 and the discharge pipe main body 61 for the purpose of improving adhesion. . The discharge member 62 is screwed by a screw 69 so as to be integrated with the piston housing case 41 and the gear housing case 31 from the outside. The discharge pipe body 61 is press-fitted into the discharge member 62.

  As shown in FIG. 4, the pump main body 10 configured in this way is provided with a sound insulation casing 70 so as to cover the pump main body 10 in order to prevent the sound generated by the reciprocating motion of the piston member 45. It is done. Note that rubber 73 and 74 are attached to the suction pipe 50 and the discharge pipe 60 in the sound insulation housing 70.

  As shown in the figure, the sound insulation case 70 is configured by combining two divided members 71 and 72. Specifically, the upper member 71 is formed of an upper plate 71a and two side plates 71b and 71c, and the lower member 72 is formed of a lower plate 72a and two side plates 72b and 72c. The members 79 and 72 are combined by a member 79 so as to form an integral casing. The side plate 71 b of the upper member 71 is formed with a hole 71 d that matches the outer diameter of the suction pipe 50 so that the suction pipe 50 protrudes outward from the sound insulation housing 70. The side plate 72b of the lower member 72 is formed with a hole 72d that matches the outer diameter of the discharge pipe 60 so that the discharge pipe 60 protrudes outward from the sound insulation casing 70. The upper member 71 is formed with a hole 77 through which the screw member 79 can be inserted, and the lower member 72 is formed with a hole 78b through which the screw member 79 can be inserted in the contact side plate 78a. .

  When the sound insulation case 70 covers the pump main body 10, the sound insulation case 70 includes inner surfaces of the upper plate 71 a, side plates 71 b, 71 c, 72 b, 72 c, and lower plate 72 a of the sound insulation case 70. An appropriate space is formed between the pump body 10 and the outer surface. Specifically, as shown in FIG. 5A, 1 mm is provided between the pump main body 10, the inner surfaces of the side plates 71 b, 71 c, 72 b, 72 c of the sound insulation housing 70 and the outer surface of the pump main body 10. A clearance C1 of 0.5 mm is formed between the pump body 10 and the inner surfaces of the upper plate 71a and the lower plate 72a of the sound insulation housing 70 and the outer surface of the pump body 10. Yes. That is, the rubbers 73 and 74 described below support the pump main body 10 so that the pump main body 10 does not come into contact with the inner surface of the sound insulating casing 70. Note that these clearances C1 and C2 correspond to the sound control portion in the present invention formed so as not to directly propagate the sound.

  Further, the rubbers 73 and 74 are formed of an elastic resin that can be expanded and contracted. As shown in the cross-sectional view of FIG. 5A, the upper parts 73a and 74a and the lower parts 73b and 74b Is formed so as to be pressed and fixed to the inner surface of the upper plate 71b and the inner surface of the lower plate 72b. That is, the height and thickness of the rubbers 73 and 74 are formed such that they are sandwiched between the upper plate 71b of the upper member 71 and the lower plate 72b of the lower member 72 without backlash. Further, insertion holes 73 c and 74 c formed with a diameter slightly smaller than the diameters of the suction pipe 50 and the discharge pipe 60 are provided at the centers of the rubbers 73 and 74. Accordingly, when the suction pipe 50 and the discharge pipe 60 are inserted into the insertion holes 73c and 74c, the suction pipe 50 and the discharge pipe 60 are preferably crimped and fixed.

  Although not shown in FIG. 4, the specific location where the rubber 73, 74 presses and fixes the suction pipe 50 and the discharge pipe 60 is the attachment member 52, in the suction pipe 50. The discharge pipe 60 is the outer periphery of the discharge member 62. Further, the rubber 73, 74 has a cross section that is perpendicular to the pipe insertion direction, with the center portions of the upper parts 73a, 74a and the lower parts 73b, 74b cut away so that back and forth, left and right rattling is reduced. It is formed so as to have a letter shape.

  The suction pipe 50 and the discharge pipe 60 of the pump main body 10 provided with the sound insulation casing 70 are provided with the following fixing members 80 to constitute the piston pump 1. The piston pump 1 is fixed to another member by the fixing member 80.

  That is, as shown in FIG. 1 and FIG. 5B, the fixing member 80 is attached to the pipe clamping portion 81 made of a material made of rubber and formed into a cylindrical shape, and a material made of metal. It is comprised from the fixed plate part 85 formed in plate shape. In the pipe sandwiching portion 81 formed in a cylindrical shape, the inner diameter in the cylinder is formed to be slightly smaller than the outer diameters of the suction pipe 50 and the discharge pipe 60. Accordingly, when the suction pipe 50 and the discharge pipe 60 are inserted into the cylindrical interior 82 of the pipe holding portion 81, the suction pipe 50 and the discharge pipe 60 are preferably brought into contact with each other by the elasticity of the rubber, and the suction pipe 50 And the discharge pipe 60 is clamped. The fixing plate portion 85 is formed with a hole 86 through which the screw member 89 is inserted when the fixing plate portion 85 is screwed to another member. As a result, the fixing member 85 can be screwed to another member by inserting the screw member 89 through the hole 86. In addition, the said pipe clamping part 81 is corresponded to the damping member contact | abutted to the support rod (the said suction pipe 50 and the discharge pipe 60) in this invention.

  Further, as shown in the drawing, the fixing member 80 holds the suction pipe 50 and the discharge pipe 60 by the pipe holding portion 81 so that the pump body 10 is floated in the air. That is, the pump body 10 is supported so that an appropriate clearance C3 is formed. In this way, the piston pump 1 in which the fixing member 80 is provided in the pump body 10 is fixed so that the portions other than the fixing member 80 do not come into contact with other members. Appropriate tubes T1 and T2 are attached to the openings 50A and 60A of the suction pipe 50 and the discharge pipe 60, and the fluid F is sucked and discharged by the piston pump 1.

  According to this piston pump 1, as described above, by fixing the pump body 10 with the fixing member 80, the portions other than the fixing member 80 are not in contact with other members, and the built-in piston The vibration generated by the reciprocating motion of the member 45 is not transmitted to other members. Further, even in the fixing member 80 that is in contact with other members only, the pipe clamping portion 81 that clamps the pipes 50 and 60 is made of elastic rubber, so that the vibration is buffered. It will come into contact in form. That is, a piston pump having excellent vibration proofing properties can be obtained.

  Further, since the pump main body 10 is covered with the sound insulation housing 70 as described above, the sound generated by the reciprocating motion of the built-in piston member 45 is insulated. Furthermore, since the sound insulation case 70 incorporates the pump body 10 with clearances (sound control parts) C1 and C2 interposed between the pump body 10 and the sound insulation case 70, the sound insulation case 70 The sound generated in the housing 70 is not directly transmitted, and the generated sound is more effectively insulated. That is, a piston pump excellent in soundproofing can be obtained.

  In addition, since the piston pump 1 has the suction pipe 50 for sucking the fluid F and the discharge pipe 60 for discharging the fluid F arranged so as to be orthogonal to each other, it is preferable to prevent vibration generated in the front-rear and left-right directions. Further, the vibration prevents the suction pipe 50 or the discharge pipe 60 from coming out of the pipe holding portion 81.

In addition, as described above, the sound insulation housing 70 covering the pump body 10 is configured by assembling two divided members (upper member 71 and lower member 72). This reduces the number of assembly steps. Therefore, the troublesome work for assembling the piston pump is eliminated.
Further, in the upper member 71 and the lower member 72 constituting the sound insulation casing 70, the side plates 71b and 72b in which holes 71d and 72d for inserting the pipes 50 and 60 are formed are respectively provided. A side plate is not formed on the opposite side. Accordingly, when the suction pipe 50 or the discharge pipe 60 provided in the pipe body 10 is to be inserted into the holes 71d and 72d, no side plate is formed on the opposite side, so that The suction pipe 50 or the discharge pipe 60 can be easily inserted into the holes 71d and 72d by moving the pipe body 10. That is, it is possible to easily perform the assembling work when configuring the sound insulation case 70.

  In the rubbers 73 and 74, the center portions of the upper parts 73a and 74a and the lower parts 73b and 74b are notched so that the pressing force of the surface to be crimped can be concentrated on the end parts. As a result, the rubbers 73 and 74 are arranged with less backlash, and the pump body 10 can be supported more preferably.

  In addition, according to the piston pump 1, the motor unit 20 and the piston unit 40 have the rotation axis direction of the motor unit 20 and the reciprocating motion direction of the piston member 45, and the central axis direction of the piston unit 40. Since they are parallel to each other and are provided adjacent to each other, useless spaces other than the motor unit 20 and the piston unit 40 are eliminated, thereby contributing to space saving. In addition, since the discharge pipe 60 and the suction pipe 50 communicated with the pressure chamber 43 of the piston pump 1 configured as described above are fixed by a fixing member 85 provided with a pipe clamping portion (vibration control member) 81, The vibration generated by the reciprocation of the piston member 45 or the like is suppressed by the pipe clamping portion (vibration suppression member) 81 and is not easily transmitted to the fixed member 85. Therefore, according to this piston pump 1, while being configured to be minimal, vibration generated by the reciprocation of the piston member 45 is difficult to be transmitted to the periphery of the pump body 10, and as a result, the vibration isolation effect The resulting piston pump.

  Further, according to the piston pump 1, the discharge pipe 60 is provided coaxially with the central axis of the piston portion 40, which is the reciprocating direction of the piston member 45, so that it is obtained by the piston movement of the piston member 45. The discharged pressure can be used as the discharge force of the fluid F without waste. Therefore, the loss of piston motion is reduced, and the piston pump can discharge the fluid F suitably.

In addition, this invention is not limited to said embodiment, In the range which does not deviate from the meaning, an appropriate selection is possible.
That is, in the piston pump 1 in the above-described embodiment, the damping member (pipe holding portion 81) that is a portion that contacts the support rod (the suction pipe 50 and the discharge pipe 60) of the fixed member, Although all the materials are made of rubber and are formed in a cylindrical shape, the present invention is not limited to this, and is formed at an appropriate thickness on a portion that abuts on the support rod (the suction pipe 50 and the discharge pipe 60). There is no problem as long as the rubber is arranged. For example, what is necessary is just to comprise so that it may be interposed. That is, in the pipe clamping part 81, rubber is formed as a single unit. However, for example, the rubber circulates around the contact portion of the support rod (the suction pipe 50 and the discharge pipe 60). Even if it has a two-layer structure in which members made of metal or the like are arranged around the rubber, a desired effect can be obtained and no problem is caused.
Further, in the piston pump 1 in the above-described embodiment, the sound damping portion is formed with appropriate clearances C1 and C2. However, the present invention is not limited to this, and an elastic material having a sound insulation effect is used instead of the clearances C1 and C2. It may be configured to be interposed. Similarly, even in the clearance C3 formed below the pump body 10, an elastic material having an effect of suppressing vibration is interposed in place of the clearances C1 and C2. Also good.
Further, in the piston pump 1 in the above-described embodiment, the pump body 10 is supported by the fixing member 80 so as to float in the hollow, but the present invention is not limited to this, and an appropriate restriction is imposed on the hollowed portion. There is no problem even if the vibration member is interposed.

It is a perspective view of the piston pump which concerns on this invention. It is a partially cutaway perspective view of a pump body provided with a suction pipe and a discharge pipe. FIG. 3 is a top sectional view of the pump body of FIG. 2. It is an exploded view at the time of covering the pump main body of FIG. 2 with a housing | casing. It is the cross-sectional view of the pump main body covered with the housing | casing, and the cross-sectional view of a fixing member.

Explanation of symbols

1 Piston pump 10 Pump body 50 Support rod (suction pipe)
60 Support rod (discharge pipe)
80 Fixed member 81 Damping member

Claims (7)

A piston pump comprising a pump body with a built-in reciprocating piston member,
A support rod provided on the pump body so as to protrude outward from the pump body;
A piston pump comprising: a fixing member that is formed of a damping member at a portion in contact with the support rod and fixes the support rod.   2. The piston pump according to claim 1, wherein the pump body is supported by the support rod so that the pump body is floated in a hollow state.   3. The piston pump according to claim 1, wherein the support rod is constituted by a pipe communicating with a pressure chamber of the pump main body. The pipe is composed of two suction pipes and a discharge pipe,
The piston pump according to claim 3, wherein the suction pipe and the discharge pipe are arranged so as to be orthogonal to each other.   The piston pump according to claim 4, wherein the discharge pipe is provided coaxially with a center axis of the piston member.   The piston according to any one of claims 1 to 5, wherein the pump body is covered with a casing, and a sound control unit is interposed between the pump body and the casing. pump. A motor unit including a rotation shaft, a central axis direction is parallel to the rotation axis direction of the motor unit, a piston unit provided adjacent to the motor unit, and engaged with the rotation shaft; A piston pump that is connected to and integrated with a power transmission unit that transmits power to a piston member provided,
A damping member that communicates with the pressure chamber of the piston portion and is disposed coaxially with the central axis of the piston portion, and a suction pipe that is orthogonal to the discharge pipe and communicates with the pressure chamber of the piston portion. Piston pump characterized by being fixed by a fixing member via

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