JP4343712B2 - Reciprocating compressor - Google Patents

Description

  The present invention relates to a reciprocating compressor suitable for use in compressing a fluid such as air.

  In general, as a reciprocating compressor, the crankshaft is driven to rotate using a motor, and the piston is reciprocated in the cylinder using the crankshaft in a reciprocating compression portion composed of a cylinder and a piston. Those are known (for example, see Patent Document 1). In such a prior art, a motor and a reciprocating compression part are attached to an airtight container via a coil spring, and the vibration generated by the motor and the reciprocating compression part is reduced using the coil spring.

Japanese Patent Laid-Open No. 5-141352

  In this case, the crankshaft is arranged in the vertical direction (Z-axis direction) and the piston is reciprocated in the left-right direction (X-axis direction). Further, the coil spring is disposed on a straight line (Y-axis direction) perpendicular to the reciprocating direction of the piston, passing through the center of gravity of the compressor unit including the motor and the reciprocating compression unit, and perpendicular to the crankshaft. At this time, the reciprocating inertial force of the piston, the centrifugal force of the crankshaft, and the like are generated in the left-right direction, whereas these forces are distributed around the straight line extending in the Y-axis direction through the center of gravity of the compressor unit. Acts as a center of inertia. For this reason, the reciprocating inertia force of the piston is converted into, for example, vibration in the vertical direction and acts on the coil spring arranged on the straight line passing through the center of gravity. At this time, since the coil spring is disposed close to the center position of the moment of inertia, the prior art is configured to reduce vibrations acting on the coil spring.

  By the way, in the above-described conventional reciprocating compressor, the reciprocating inertia force of the piston, the centrifugal force of the crankshaft, and the like are generated in the left-right direction, while the coil spring absorbs these forces as vertical vibrations. It is the composition to do. However, since the reciprocating inertial force of the piston is generated in the left-right direction, all the vibrations in the left-right direction cannot be converted in the up-down direction, and the vibration in the left-right direction tends to be applied to the coil spring. As a result, there is a problem that a force in a direction in which the coil spring is twisted or bent by the vibration of the compressor unit acts, and the durability of the coil spring is likely to be lowered.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to prevent a force acting in a plurality of directions from acting on a vibration absorbing member such as a spring and to improve the durability of the vibration absorbing member. It is an object of the present invention to provide a reciprocating compressor capable of improving the efficiency.

In order to solve the above-described problems, the invention of claim 1 is directed to a motor, a crankshaft that is rotationally driven by the motor and has an eccentric diameter with respect to the rotational axis of the motor, In the reciprocating compressor comprising the reciprocating compression portion comprising a piston that reciprocates in the direction perpendicular to the rotation axis of the motor, and a mounting member on which the motor and the reciprocating compression portion are placed. The mounting member includes an attachment portion attached to at least one of the motor and the reciprocating compression portion, an extension portion extending from the attachment portion in the reciprocating direction of the piston, and an extension direction of the extension portion. a support member a tip side have a, an arm portion disposed in the inner area of the eccentric diameter of the crankshaft relative to the reciprocating direction of the piston, for supporting the said motor and reciprocating compression section, Arm portion of the support member A pedestal member provided at a distance from each other in the direction of reciprocation of the piston for, is characterized by being configured by the vibration absorbing member provided between the arms of the pedestal member and the support member.

According to a second aspect of the present invention, the piston of the reciprocating compression portion is configured to reciprocate in the vertical direction, the pedestal member is disposed below the arm portion of the support member, and the arm portion of the support member and the pedestal The vibration absorbing member is sandwiched between the members.

In the invention of claim 3, the upper end position of the previous SL vibration absorbing member is disposed below the eccentric amount when at above the axis of rotation of the motor, and a piston of the reciprocating compression section has come to the upper end It is configured to do.

According to a fourth aspect of the present invention, the vibration absorbing member absorbs vibration in a direction parallel to the reciprocating direction of the piston.

  According to the first aspect of the present invention, the arm portion of the support member and the pedestal member are provided apart from each other in the reciprocating direction of the piston, and the vibration absorbing member is provided between the arm portion and the pedestal member. Even when vibration is generated in the reciprocating direction of the piston by the dynamic compression portion, a force parallel to the reciprocating direction of the piston can be applied to the vibration absorbing member via the support member. Vibrations due to motors and the like can be absorbed. In addition, since a force in a single direction parallel to the reciprocating direction of the piston acts on the vibration absorbing member, it is possible to prevent the vibration absorbing member from being twisted or bent due to the force from a plurality of directions. Reliability and durability can be improved.

  In addition, since the arm part of the support member is arranged in the inner region of the eccentric diameter of the crankshaft with respect to the reciprocating direction of the piston, vibrations by the motor and the reciprocating compression part act as inertia moments around the crankshaft. Even when this is done, the moment of inertia acting on the vibration absorbing member can be reduced. As a result, the vibration force acting on the vibration absorbing member can be reduced and reliably absorbed, and the transmission of vibration to the pedestal member can be suppressed, and vibration and noise can be reduced.

Further, the support member includes a mounting portion attached to a motor or the like, and extending VITA extending portion to the reciprocating direction of the piston from the mounting portion, the arm portion provided on the distal end side of the extending direction of the extending portion Therefore, the present invention can be easily applied to reciprocating compressors that have been widely used in the past by fixing the mounting portion of the support member to a motor or the like.

According to the invention of claim 2 , the piston of the reciprocating compression portion is configured to reciprocate in the vertical direction, the pedestal member is disposed below the arm portion of the support member, and the arm portion of the support member, the pedestal member, Since the vibration absorbing member is sandwiched between, the arm portion of the support member is placed on the upper side of the pedestal member so as to absorb the vibration generated by the motor and the reciprocating compression portion, While being able to reduce, the weight of a motor etc. can be supported by a base member.

According to the invention of claim 3 , since the upper end position of the vibration absorbing member is arranged above the rotational axis of the motor and below the eccentric amount when the piston of the reciprocating compression unit comes to the upper end, Even when the vertical vibration caused by the motor and the reciprocating compression portion acts as an inertia moment around the crankshaft, the inertia moment acting on the vibration absorbing member can be reduced. As a result, the vibration force acting on the vibration absorbing member can be reduced and reliably absorbed, and the transmission of vibration to the pedestal member can be suppressed, and vibration and noise can be reduced.

  At this time, since the vibration absorbing member is provided between the support member and the base member, the vibration in the vertical direction generated by the motor and the reciprocating compression unit can be reliably absorbed by the vibration absorbing member. In addition, since the same vertical force as the reciprocating direction of the piston acts on the vibration absorbing member, it is possible to prevent the vibration absorbing member from being twisted or bent due to the force from multiple directions, and the reliability of the vibration absorbing member , Can increase durability.

According to the invention of claim 4 , since the vibration absorbing member is configured to absorb the vibration in the direction parallel to the reciprocating direction of the piston, the vibration absorbing member disposed between the support member and the pedestal member, Even when a vibration acts in the reciprocating direction of the piston by the motor and the reciprocating compression unit, the vibration can be reliably absorbed using the vibration absorbing member.

  Hereinafter, a case where the reciprocating compressor according to the embodiment of the present invention is applied to a reciprocating air compressor will be described as an example and described in detail with reference to the accompanying drawings.

  1 and 2 show an air compressor according to a first embodiment of the present invention. In the figure, 1 is an electric motor (motor) as a drive source, and the electric motor 1 is, for example, a DC brushless motor. (DCBL motor) and the like, and includes a motor housing 2, a stator 5, a rotor 6, a rotating shaft 7, and the like, which will be described later.

  Reference numeral 2 denotes a motor housing that forms the outer shape of the electric motor 1. The motor housing 2 includes a housing main body 3 whose one end is closed by a partition wall 3 </ b> A, and a covered cylindrical lid that covers the other end of the housing main body 3. It consists of a body 4. The housing body 3 is integrally formed with a cylindrical body portion 3B extending from the end face of the partition wall portion 3A toward one side in the axial direction, and the body portion 3B constitutes a crankcase 12 described later together with the partition wall portion 3A and the like. is doing. A through hole 3 </ b> C that allows a crank chamber A (described later) to communicate with the cylinder 16 is formed in the body portion 3 </ b> B. Further, four leg portions 3D are provided on the bottom surface side of the motor housing 2, and the leg portions 3D are fixed on the base 31 using bolts 32 described later.

  Reference numeral 5 denotes a stator fixed to the inner peripheral side of the housing body 3, and the stator 5 is constituted by, for example, a stator coil, and surrounds the rotor 6 from the outer peripheral side.

  Reference numeral 6 denotes a rotor provided on the inner peripheral side of the stator 5, and the rotor 6 is constituted by, for example, a permanent magnet, and a rotation shaft 7 is integrally provided at the center position thereof.

  Reference numeral 7 denotes a rotating shaft fixed to the rotor 6. The rotating shaft 7 extends in the horizontal direction (lateral direction) and is rotatably supported by bearings 8 provided on the partition wall 3 </ b> A and the lid body 4. Has been. Further, one end side of the rotary shaft 7 projects into the crankcase 12 to form an output shaft portion 7A. The rotating shaft 7 is configured to rotate together with the rotor 6 around the rotation axis O1-O1.

  Reference numeral 9 denotes a partition plate that blocks the crank chamber A from the outside. The partition plate 9 is formed in a substantially disc shape, and covers the front end side of the body portion 3B of the housing body 3 to cover one end of the crankcase 12. Part. Further, an insertion hole 9A is formed in the central portion of the partition plate 9, and the distal end side of the output shaft portion 7A of the rotating shaft 7 is inserted into the insertion hole 9A.

  Reference numeral 10 denotes a cover attached to the front end side of the body 3B of the housing body 3. The cover 10 is formed in a covered cylinder shape and has a large number of vent holes 10A. The cover 10 defines a fan chamber B between the cover plate 9 and a cooling fan 11 attached to the front end side of the output shaft portion 7A is accommodated in the fan chamber B.

  Reference numeral 12 denotes a crankcase formed in a box shape by the partition wall portion 3A, the body portion 3B and the partition plate 9 of the housing body 3. The crankcase 12 defines a crank chamber A therein, and the crank chamber A A crankshaft 13, a balance weight 14 and the like, which will be described later, are accommodated.

  Reference numeral 13 denotes a crankshaft that is rotatably provided in the crankcase 12. The crankshaft 13 includes an output shaft portion 7 A of the rotating shaft 7 protruding into the crankcase 12. The weight 14 is integrally formed. The crankshaft 13 has an eccentric axis O2-O2 that is displaced (eccentric) by a certain eccentric diameter r with respect to the rotational axis O1-O1 of the rotating shaft 7, and the piston 19 described later is substantially equal to the eccentric diameter r. Reciprocating in the vertical direction with the same amount of eccentricity.

  Reference numeral 15 denotes a reciprocating compression portion attached to the crankcase 12, and the reciprocating compression portion 15 includes a cylinder 16, a piston 19, and the like which will be described later.

  Reference numeral 16 denotes a cylindrical cylinder mounted on the crankcase 12. The cylinder 16 communicates with the inside of the crank chamber A through the through hole 3C of the body portion 3B, and a piston 19 (to be described later) is slidable therein. Is inserted. A valve plate 17 is airtightly fixed to the upper end side of the cylinder 16.

  A cylinder head 18 is mounted on the cylinder 16 via a valve plate 17. The cylinder head 18 forms a discharge chamber with the valve plate 17 and is compressed in the cylinder 16 through the external discharge port 18A. Air is discharged to the outside.

  A piston 19 is slidably provided in the cylinder 16, and the piston 19 reciprocates in a vertical direction (vertical direction) perpendicular to the rotation axis O1-O1. Further, the piston 19 is integrally formed with a piston rod 20 in the center on the lower surface side to constitute a so-called rocking piston. On the other hand, a retainer 21 is fitted and fixed to the upper surface side of the piston 19, and an annular lip seal 22 as a seal member is disposed between the retainer 21 and the piston 19. The lip seal 22 is in sliding contact with the inner peripheral surface of the cylinder 16 and hermetically seals a gap formed between the cylinder 16 and the piston 19.

  Here, the lower end side of the piston rod 20 is rotatably connected to the crankshaft 13 via the bearing 23, and the rotation of the crankshaft 13 is transmitted to the piston 19, thereby swinging the piston 19 in the cylinder 16. Reciprocate. The piston 19 defines a compression chamber in the cylinder 16 with the valve plate 17 and compresses the air sucked into the compression chamber via an intake valve 25 described later.

  An intake hole 24 is provided in the piston 19 and the retainer 21. The intake hole 24 communicates with the crank chamber A and the compression chamber, and an intake valve 25 is attached to the intake hole 24 so as to be opened and closed. . The intake valve 25 opens in the intake stroke of the piston 19 and closes in the discharge stroke (compression stroke).

  A discharge hole 26 is formed in the valve plate 17. The discharge hole 26 communicates the compression chamber and the discharge chamber, and a discharge valve 27 is attached to the opening on the discharge chamber side so as to be opened and closed. . The discharge valve 27 is configured to close in the intake stroke of the piston 19 and open in the discharge stroke when the pressure in the compression chamber exceeds a predetermined pressure value.

  A control unit 28 is mounted on the motor housing 2 adjacent to the reciprocating compression unit 15. The control unit 28 includes a drive circuit 29 including, for example, an inverter circuit, and a control unit cover 30 that covers the drive circuit 29. And the number of revolutions of the electric motor 1 is controlled.

  Reference numeral 31 denotes a base as a supporting member that constitutes a mounting member together with a later-described gantry 33 and a vibration isolating rubber 34. 15 and the control unit 28 are supported. The base 31 includes an attachment portion 31A to which the leg portion 3D of the electric motor 1 is attached, and an extending portion 31B extending in parallel with the reciprocating direction (vertical direction) of the piston 19 from the outer peripheral edge of the attachment portion 31A. And an arm portion 31C provided on the distal end side (upper end side) of the extending portion 31B in the extending direction and extending in the horizontal direction.

  The mounting portion 31A has, for example, a flat plate shape arranged along a horizontal plane. The leg portion 3D of the motor housing 2 is placed on the surface of the mounting portion 31A, and the leg portion 3D is screwed and fixed using a bolt 32. ing. For example, four extending portions 31B are provided on the outer peripheral edge of the mounting portion 31A, and these four extending portions 31B surround the electric motor 1 with the rotation axis O1-O1 interposed therebetween.

  Further, a total of four arm portions 31C are provided at positions sandwiching the rotation axis O1-O1 corresponding to each extending portion 31B, for example, and the arm portions 31C are directed away from the electric motor 1 with respect to the extending portion 31B. While extending, it is disposed in the inner region of the eccentric diameter r of the crankshaft 13 with respect to the reciprocating direction of the piston 19. That is, at least the lower surface side of the arm portion 31C supported by a vibration-proof rubber 34 described later is higher by an eccentric diameter r and lower by an eccentric diameter r than the rotation axis O1-O1 of the electric motor 1 with respect to the vertical direction. It is located in the area sandwiched between the positions.

  Reference numeral 33 denotes a pedestal as a pedestal member provided apart from the arm portion 31C of the base 31 in the reciprocating direction of the piston 19, and the pedestal 33 is, for example, two pieces erected by bending in an L shape. The lower end side is installed and fixed in a place where an air compressor is used, for example. Further, the upper end side of the gantry 33 forms a receiving portion 33A extending in the horizontal direction so as to be parallel to the arm portion 31C, and the receiving portion 33A faces the arm portion 31C while being positioned below the arm portion 31C. ing.

  34 is an anti-vibration rubber as a vibration absorbing member provided between the arm portion 31C of the base 31 and the receiving portion 33A of the gantry 33. The anti-vibration rubber 34 is provided between the arm portion 31C and the receiving portion 33A. It is pinched. Thereby, the upper end position of the vibration isolating rubber 34 is arranged in a region between a position that is higher than the rotational axis O1-O1 of the electric motor 1 by the eccentric diameter r and a position that is lower by the eccentric diameter r with respect to the vertical direction. Preferably, the electric motor 1 is arranged above the rotational axis O1-O1 and below the eccentric amount (eccentric diameter r) when the piston 19 of the reciprocating compression unit 15 comes to the upper end. The anti-vibration rubber 34 has a rubber hardness that minimizes the vibration F, and is configured to absorb vibrations in the reciprocating direction (vertical direction) of the piston 19.

  The reciprocating type air compressor according to the present embodiment has the above-described configuration. Next, the operation thereof will be described.

  First, when the rotary shaft 7 is rotationally driven by the electric motor 1, the rotation of the output shaft portion 7A of the rotary shaft 7 and the rotation of the crankshaft 13 is transmitted to the piston 19 through the bearing 23 and the piston rod 20, and the piston 19 is a cylinder. While reciprocating in 16, it reciprocates in the vertical direction over a distance twice the eccentric diameter r of the crankshaft 13.

  The piston 19 reciprocates in the cylinder 16, so that in the suction stroke in which the piston 19 reaches from the top dead center to the bottom dead center, the pressure in the compression chamber becomes negative. Air is inhaled. In the compression stroke in which the piston 19 reaches from the bottom dead center to the top dead center in the cylinder 16, the discharge valve 27 is opened by compressing the air in the compression chamber, so that the compressed air is discharged through the discharge chamber. The compressed air is stored in an external air tank (not shown) or the like.

  Here, with the reciprocating motion of the piston 19 and the piston rod 20, vibration along the reciprocating motion direction (vertical direction) of the piston 19 is generated in the reciprocating compression portion 15. At this time, the centrifugal force accompanying the rotational movement of the crankshaft 13, the balance weight 14 and the like also tends to act greatly in the same vertical direction as the reciprocating direction of the piston 19, so that the electric motor 1, the reciprocating compression unit 15 and the control are controlled. A vertical vibration F acts on the portion 28.

  In particular, when the rotational speed of the electric motor 1 is variably controlled using the control unit 28 including an inverter control circuit or the like, the piston 19 can be used even when the weight balance with the piston 19 or the like is achieved using the balance weight 14. The moment of inertia generated by the above cannot be canceled out sufficiently, and the electric motor 1, the reciprocating compression unit 15 and the like tend to vibrate greatly in the vertical direction in which the piston 19 reciprocates.

  On the other hand, in the present embodiment, the arm portion 31C of the base 31 and the receiving portion 33A of the gantry 33 are provided apart from each other in the reciprocating direction of the piston 19, and the arm portion 31C and the receiving portion 33A are protected from each other. Since the vibration rubber 34 is provided, even when vibration F is generated in the reciprocating direction of the piston 19 by the electric motor 1 and the reciprocating compression unit 15, the vibration isolating rubber 34 is reciprocated via the base 31. A vertical force parallel to the moving direction can be applied. As a result, the vibration F caused by the electric motor 1, the reciprocating compression unit 15 and the like can be absorbed by the vibration isolating rubber 34.

  Further, since a single directional force parallel to the reciprocating direction of the piston 19 acts on the anti-vibration rubber 34, the anti-vibration rubber 34 can be prevented from being twisted or bent due to the force from a plurality of directions. The reliability and durability of the vibration rubber 34 can be improved.

  Further, since the arm portion 31C of the base 31 is disposed in the inner region of the eccentric diameter r of the crankshaft 13 with respect to the reciprocating direction of the piston 19, vibration F caused by the electric motor 1 and the reciprocating compression portion 15 is caused by the crankshaft 13. Even when acting as a moment of inertia around the vicinity (around the rotation axis O 1 -O 1), the moment of inertia acting on the vibration-proof rubber 34 can be reduced. As a result, the force of the vibration F acting on the anti-vibration rubber 34 can be reduced and reliably absorbed, and the transmission of vibration to the gantry 33 can be suppressed, and vibration and noise can be reduced. .

  Furthermore, the base 31 includes an attachment portion 31A attached to the electric motor 1 and the like, an extension portion 31B extending in parallel to the reciprocating direction of the piston 19 from the attachment portion 31A, and an extension direction of the extension portion 31B. Since the arm portion 31C is provided on the distal end side, the leg portion 3D of the electric motor 1 can be easily fixed to the attachment portion 31A in a state where the electric motor 1 is placed on the attachment portion 31A of the base 31. . Further, by fixing the leg portion 3D of the electric motor 1 to the attachment portion 31A of the base 31, the present invention can be easily applied to a reciprocating compressor that has been widely used in the past. , Noise can be reduced.

  In addition, the piston 19 of the reciprocating compression unit 15 is configured to reciprocate in the vertical direction, and the receiving portion 33A of the gantry 33 is disposed below the arm portion 31C of the base 31, and the arm portion 31C and the receiving portion 33A Since the anti-vibration rubber 34 is sandwiched between the electric motor 1 and the reciprocating compression unit, the arm portion 31C of the base 31 is placed on the upper side of the receiving portion 33A of the gantry 33 with the anti-vibration rubber 34 interposed therebetween. The vibration F generated by the motor 15 can be absorbed to reduce vibration and noise, and the weight of the electric motor 1 and the like can be supported by the gantry 33.

  Next, FIG. 3 shows a second embodiment according to the present invention. The feature of this embodiment is that the arm portions of the base are arranged on both ends of the rotation axis O1-O1. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  Reference numeral 41 denotes a base as a supporting member according to the present embodiment, and the base 41 constitutes a mounting member together with a later-described gantry 42 and a vibration isolating rubber 43, and an electric motor via a leg 3 </ b> D of the motor housing 2 1. The reciprocating compression unit 15 and the control unit 28 are supported. Similarly to the base 31 according to the first embodiment, the base 41 includes a mounting portion 41A to which the leg portion 3D of the electric motor 1 is mounted, and the reciprocating direction of the piston 19 from the outer peripheral edge of the mounting portion 41A ( The extending portion 41B extends parallel to the vertical direction) and the arm portion 41C is provided on the distal end side (upper end side) in the extending direction of the extending portion 41B and extends in the horizontal direction. However, the base 41 of the present embodiment has a bottomed box shape with the upper end opened as a whole, and its arm portion 41C has both ends of the rotation axis O1-O1 sandwiching the electric motor 1 and the reciprocating compression portion 15. It differs from the base 31 according to the first embodiment in that it is arranged on the side.

  The mounting portion 41A has, for example, a flat plate shape arranged along a horizontal plane. The leg portion 3D of the motor housing 2 is placed on the surface of the mounting portion 41A, and a leg portion 3D using a bolt (not shown) or the like. Is fixed with screws. In addition, the extending portion 41B is a four-side wall erected over the entire circumference of the outer peripheral edge of the mounting portion 41A, and surrounds the electric motor 1 and the reciprocating compression portion 15.

  Furthermore, a total of four arm portions 41C are provided, for example, two at each end of the rotation axis O1-O1 in the distal end side of the extending portion 41B, and the electric motor 1 and the reciprocating compression portion 15 are connected to the extending portion 41B. It extends in the direction away from it, and is arranged in the inner region of the eccentric diameter r of the crankshaft 13 with respect to the reciprocating direction of the piston 19 as in the arm portion 31C according to the first embodiment.

  Reference numeral 42 denotes a pedestal as a pedestal member provided apart from the arm portion 41C of the base 41 in the reciprocating direction of the piston 19. The pedestal 42 is, for example, two pieces that are erected by bending in an L shape. The lower end side is installed and fixed in a place where an air compressor is used, for example. The upper end side of the gantry 42 has a receiving portion 42A extending in the horizontal direction so as to be parallel to the arm portion 41C, and the receiving portion 42A faces the arm portion 41C in a state of being positioned below the arm portion 41C. ing.

  43 is an anti-vibration rubber as a vibration absorbing member provided between the arm portion 41C of the base 41 and the receiving portion 42A of the gantry 42. The anti-vibration rubber 43 is provided between the arm portion 41C and the receiving portion 42A. It is pinched. As a result, the upper end position of the anti-vibration rubber 43 is arranged in a region between a position that is higher by an eccentric diameter r and a position that is lower by an eccentric diameter r than the rotation axis O1-O1 of the electric motor 1 in the vertical direction. Preferably, the electric motor 1 is arranged above the rotational axis O1-O1 and below the eccentric amount (eccentric diameter r) when the piston 19 of the reciprocating compression unit 15 comes to the upper end. The anti-vibration rubber 43 has a rubber hardness that minimizes the vibration F and is configured to absorb vibrations in the reciprocating direction (vertical direction) of the piston 19.

  Thus, in the present embodiment configured as described above, it is possible to obtain substantially the same operational effects as those of the first embodiment.

  In each of the above-described embodiments, the vibration isolating rubbers 34 and 43 are used as the vibration absorbing member. However, the present invention is not limited to this, and for example, a configuration using a coil spring, a damper, or the like as the vibration absorbing member. Good. Further, in each of the above embodiments, the crankshaft 13 is formed separately from the rotating shaft 7. However, for example, the crankshaft may be formed integrally with the rotating shaft.

  In each of the above embodiments, the receiving portions 33A and 42A of the gantry 33 and 42 are arranged below the arm portions 31C and 41C of the bases 31 and 41. For example, the receiving portion of the gantry is the base arm. It is good also as a structure which absorbs a vibration by arrange | positioning above a part and providing vibration absorption members, such as a vibration-proof rubber, between these receiving parts and an arm part.

  In each of the above embodiments, the rotation axis O1-O1 of the electric motor 1 is disposed in the horizontal direction, and the piston 19 of the reciprocating compression unit 15 is reciprocated in the vertical direction (vertical direction). The arm portions 31C and 41C and the receiving portions 33A and 42A of the gantry 33 and 42 are arranged so as to be spaced apart in the vertical direction with the anti-vibration rubbers 34 and 42 interposed therebetween. However, the present invention is not limited to this, for example, the rotation axis of the electric motor is arranged in the vertical direction, the piston of the reciprocating compression unit is reciprocated in the horizontal direction, and the arm part of the base and the receiving part of the gantry are prevented. It is good also as a structure arrange | positioned spaced apart in the horizontal direction on both sides of a vibration rubber.

  Moreover, in each said embodiment, although it was set as the structure which attaches the bases 31 and 41 to the leg part 3D of the electric motor 1, it is good also as a structure which attaches a base to a reciprocating compression part, for example. In each of the above embodiments, the electric motor 1 and the bases 31 and 41 as support members are formed as separate members. For example, an arm portion extending in the horizontal direction is integrally formed on the side of the motor housing of the electric motor. The support member may be constituted by the arm portion.

  Further, in each of the above embodiments, a reciprocating air compressor has been described as an example of the reciprocating compressor. However, the present invention is not limited to this, and can be widely applied to, for example, vacuum pumps, refrigerant compressors, and the like.

It is a longitudinal section showing a reciprocating type air compressor by a 1st embodiment of the present invention. It is the cross-sectional view which looked at the reciprocating type air compressor by 1st Embodiment from the arrow II-II direction in FIG. It is a longitudinal cross-sectional view which shows the reciprocating type air compressor by 2nd Embodiment.

Explanation of symbols

1 Electric motor (motor)
2 Motor housing 3D Leg part 7 Rotating shaft 13 Crankshaft 15 Reciprocating compression part 16 Cylinder 19 Piston 31,41 Base (support member)
31A, 41A Mounting portion 31B, 41B Extending portion 31C, 41C Arm portion 33, 42 Mounting base (base member)
33A, 42A receiving part 34, 43 Anti-vibration rubber (vibration absorbing member)
O1 Rotating axis O2 Eccentric axis r Eccentric diameter (Eccentricity)

Claims (4)

A motor, a crankshaft that is rotationally driven by the motor and has an eccentric diameter with respect to the rotational axis of the motor, and a piston that reciprocates in the cylinder in a direction orthogonal to the rotational axis of the motor by being driven by the crankshaft. In a reciprocating compressor composed of a reciprocating compression unit, and a mounting member on which the motor and the reciprocating compression unit are mounted,
The mounting member includes an attachment portion attached to at least one of the motor and the reciprocating compression portion, an extension portion extending from the attachment portion in the reciprocating direction of the piston, and an extension of the extension portion. a direction of the distal end side have a, an arm portion disposed in the inner area of the eccentric diameter of the crankshaft relative to the reciprocating direction of the piston, the support member for supporting said motor and reciprocating compression section And a pedestal member provided apart from the arm portion of the support member in the reciprocating direction of the piston, and a vibration absorbing member provided between the pedestal member and the arm portion of the support member. A reciprocating compressor characterized by that. The piston of the reciprocating compression part is configured to reciprocate in the vertical direction, the pedestal member is disposed below the arm part of the support member, and the vibration is provided between the arm part of the support member and the pedestal member. The reciprocating compressor according to claim 1, wherein the reciprocating compressor is configured to sandwich the absorbing member. The upper end position of the previous SL vibration absorbing member is a above the axis of rotation of the motor, and to claim 2 in which the piston of the reciprocating compression section is configured so as to disposed below eccentricity when come to the upper end The described reciprocating compressor. The vibration absorbing member, reciprocating compressor as claimed in claim 1, 2 or 3 comprising a structure that absorbs the vibrations of the reciprocating direction parallel to the direction of the piston.

Images