WO2019148911A1 - Pompe à fluide - Google Patents

Pompe à fluide Download PDF

Info

Publication number
WO2019148911A1
WO2019148911A1 PCT/CN2018/112844 CN2018112844W WO2019148911A1 WO 2019148911 A1 WO2019148911 A1 WO 2019148911A1 CN 2018112844 W CN2018112844 W CN 2018112844W WO 2019148911 A1 WO2019148911 A1 WO 2019148911A1
Authority
WO
WIPO (PCT)
Prior art keywords
swash plate
retainer
piston
piston assembly
ball joint
Prior art date
Application number
PCT/CN2018/112844
Other languages
English (en)
Chinese (zh)
Inventor
李涌权
Original Assignee
上海海压特智能科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 上海海压特智能科技有限公司 filed Critical 上海海压特智能科技有限公司
Publication of WO2019148911A1 publication Critical patent/WO2019148911A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/22—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
    • F04B1/2014—Details or component parts

Definitions

  • the present invention relates to a fluid pump, and more particularly to a disc-shaped retainer disposed on a swash plate and independently rotating the swash plate so that the piston connected to the retainer generates fluid pressure (oil pressure or Hydraulic pump for water pressure).
  • a conventional fluid pump such as a hydraulic pump, utilizes a phenomenon in which the phase changes when rotating on a swash plate that is inclined to one side.
  • a simple observation of the structure reveals that the piston that generates fluid pressure by linear motion inside the cylinder is connected to the retainer through the plunger shoe.
  • the retainer acts to suspend the plunger shoe, as the retainer is adjacent to the swashplate, with the result that the piston can be in intimate contact with the swashplate.
  • the retainer is connected to the cylinder with the piston as a medium, so that the retainer also rotates inside the casing.
  • the retainer is located between the swash plate and the plunger shoe so that the inclined surface of the swash plate can push or pull the force of the piston through the retainer to the piston.
  • a piston located inside the cylinder is connected to the retainer by the plunger shoe, so that the retainer may be pulled during the rotation of the retainer along the inclined surface of the swash plate.
  • the holder can be inclined in a plurality of directions during the rotation.
  • the holder can simultaneously roll and spiral around other axes than the basic axis of rotation. Therefore, wear of the retainer easily occurs during use of the pump, and there is a problem of poor durability.
  • connection structure between the piston and the swash plate is composed of a plurality of members, there is a problem in that the number of components is increased and the assemblability is deteriorated.
  • the assembly between the retainer and the plunger shoe, and the assembly between the piston and the plunger shoe are required, the assembly requires precise operation, which makes automation difficult and further increases Manufacturing costs.
  • the present invention has been made to solve the above-mentioned problems of the prior art, and an object of the present invention is to make a disc-shaped retainer in close contact with a swash plate to rotate the retainer while maintaining a certain angle.
  • Another object of the present invention is to facilitate the assembly of the piston and the retainer while inserting the piston into the retainer to function as a plunger shoe.
  • the fluid pump of the present invention comprises: a housing having a driving space formed therein; and a swash plate located in a driving space of the housing to be fixed a state having an inclined surface; a cylinder block located in the drive space and rotating through a drive shaft, wherein a plurality of cylinder bores extend in the same direction as the drive shaft; a plurality of piston assemblies, at least a portion of the piston assembly being inserted
  • the inside of the cylinder bore of the cylinder block linearly moves inside the cylinder bore while the cylinder block rotates, and has a ball joint at one end thereof; and a disc-shaped retainer, the retainer and the swash plate
  • the swash plate can be independently rotated, and the ball joint of the piston assembly is connected, in a state in which the piston assembly is in close contact with the inclined surface of the swash plate, The piston assembly rotates together.
  • the holder is rotatably coupled to a central portion of the swash plate through a rotary joint, and is rotated with a certain inclination angle corresponding to the inclined surface of the swash plate.
  • the retainer is in the shape of a disk having a certain thickness, and the central portion passes through the drive shaft, has a center hole embedded in the rotary joint, and a plurality of retainings are formed in the circumferential direction around the central hole The hole is pressed into the ball joint.
  • the piston assembly includes: a piston body inserted into a cylinder bore of the cylinder block; and a ball joint, one end of which is rotatably coupled to a portion of the piston body facing the outside of the cylinder bore, and the other end Connected to the holder.
  • both ends of the ball joint are rotatably connected to the piston body and the retainer of the piston assembly, respectively.
  • one end of the ball joint is press-fitted into a joint mounting hole fitted to the piston body, and the other end has a ball that is in close contact with the inclined surface of the swash plate by the retainer.
  • an opposite side of the portion of the piston body to which the ball joint is coupled is coupled with a pressurizing unit that pressurizes a fluid in a cylinder bore of the cylinder block.
  • the retainer that closely contacts the piston with the swash plate is rotatably coupled to the swash plate, and thus rotates while being in close contact with the inclined surface of the swash plate while maintaining a certain rotation angle. Therefore, during the movement of the pump, it is possible to prevent the retainer from being arbitrarily rotated or tilted around the other rotating shafts which are not related to the basic rotating shaft, thereby preventing the wear occurring in the process and having an effect of improving durability.
  • the retainer of the present invention rotates at a certain inclination angle corresponding to the inclined surface of the swash plate, noise caused by the sway of the retainer is reduced during the operation of the pump, and the retainer and the piston connected thereto can be realized.
  • the stable action can improve the operational reliability of the pump.
  • the assembly between the piston and the retainer is achieved when the ball joint connected to the piston is pressed into the retainer hole of the retainer. Therefore, the complicated assembly process between the retainer and the plunger shoe can be omitted, and the number of components of the retainer and the plunger shoe can be reduced. This has the effect of reducing the manufacturing cost of the fluid pump.
  • the retainer is rotatably fixed to the swash plate so that it can be substantially stably operated, so that the allowable error for the stable operation of the retainer and the manufacture/assembly of the respective members for preventing wear can be relatively increased, thereby reducing the Part of the manufacturing cost factor.
  • the retainer also functions to share the plunger shoe so that the interval between the pistons is always kept constant, thereby also having a smoother and smoother running effect.
  • Figure 1 is a perspective view showing the structure of an embodiment of a fluid pump of the present invention
  • Figure 2 is an exploded perspective view showing the members constituting the embodiment of Figure 1 in an exploded state
  • FIG. 3 is a perspective view showing a state in which a part is cut in order to show the internal structure of the casing shown in the member of FIG. 2;
  • Figure 4 is a cross-sectional view taken along line II' of Figure 1;
  • Figure 5 is an exploded perspective view showing the structure of the exploded piston assembly in the member shown in Figure 2;
  • Fig. 6 is a perspective view showing the internal structure of the housing removed in Fig. 1.
  • 10 is the first housing
  • 11 is the main body of the first housing
  • 13, 13' is a first communication slot and a second communication slot
  • 18a, 18c are a first port, a second port, and 18b is a discharge hole
  • 19 is the first flange, 19' is the first fastening hole,
  • 33 is the first shaft hole, 34 is the base,
  • 35 is a swashplate, 36 is an inclined surface,
  • 55a is the piston part
  • 55b is the fluid flow part
  • 70 is the piston assembly
  • 71 is the piston body
  • 72 is a joint mounting hole
  • 72' is the assembly protrusion
  • 74 is a ball
  • 75 is the piston connection
  • 76 is a pressurizing unit, 77 is the assembly tank,
  • 80 is the holder, 81 is the main body of the disc,
  • 82 is a retainer hole
  • 83 is the center hole
  • 91 is the main body of the shaft
  • 92 is the drive connection
  • 93 is a cylinder connection portion.
  • the present invention relates to a fluid pump that generates a hydraulic pressure or a hydraulic pressure by rotating a drive shaft 90 by an electric motor, an engine, or the like, and converting a rotational force of the drive shaft 90 into a parallel motion of the piston.
  • the swash plate 35 is fixed without being rotated, and the holder 80 is independently rotated with respect to the swash plate 35, but is fixed in a rotatable manner with respect to the swash plate 35.
  • the holder 80 is always rotated in such a manner as to maintain a certain inclination angle, thereby preventing the holder 80 from tilting or shaking during the rotation.
  • the frame of the present invention is formed from housings 10,30.
  • the housings 10, 30 are generally cylindrical and have a drive space 12 therein.
  • the housings 10, 30 can be considered to be composed of two.
  • the housings 10, 30 are composed of a first housing 10 and a second housing 30.
  • a sealed driving space 12 is formed therein.
  • the second housing 30 can be considered a cover.
  • the first housing 10 and the second housing 30 are separated from each other.
  • the first casing 10 has a drive space 12 inside the main body 11 of the first casing 10 and a communication groove inside the drive space 12.
  • the communication groove is roughly divided into two parts, and the communication groove can be divided into a first communication groove 13 and a second communication groove 13' which are separated from each other.
  • the first communication groove 13 and the second communication groove 13' are connected to the inlet and outlet of the piston assembly 70 described below.
  • the first port 18a as a part is connected to the first communication groove 13, and the remaining second port 18c is connected to the second communication groove 13'.
  • the fluid extruded by the piston assembly 70 can be discharged through the first communication groove 13 or the second communication groove 13'.
  • the first communication groove 13 is connected to the first port 18a, and the second communication groove 13' is connected to the second port 18c.
  • the first port 18a and the second port 18c are both open to the outside of the fluid pump, and the first port 18a and the second port 18c may be connected to an external device such as a manipulator (not shown) Or a fluid reservoir (not shown).
  • a manipulator not shown
  • a fluid reservoir not shown.
  • the number, position, and shape of the first communication groove 13, the second communication groove 13', and the first port 18a and the second port 18c connected thereto as described above are merely examples and may be changed.
  • the drive space 12 of the first housing 10 has an inner housing 15 and a locking ring portion 14.
  • the inner casing 15 is in close contact with the inner surface of the first casing 10, and the lock ring portion 14 is located at the innermost side of the drive space 12, here locked to the edge portion of the cylinder block 50 as described below.
  • the inner casing 15 and the locking ring portion 14 may be omitted or integrally formed with the first casing 10.
  • the cover 17 at the end of the first housing 10 is integrally formed with the first housing 10. Since the synthetic resin material of the first casing 10 is formed by injection molding, the cover body 17 may also be formed together as a part of the first casing 10. Of course, the lid body 17 may be separately assembled with the first casing 10 and then assembled.
  • Reference numeral 18b denotes one of the external communication holes 18, which indicates the discharge hole 18b that discharges the compressed air during the assembly of the drive shaft 90.
  • the discharge hole 18b constitutes an external communication hole 18 formed in the first casing 10 together with the first port 18a and the second port 18c described above.
  • a first flange 19 is provided at an edge of the first housing 10.
  • the first flange 19 protrudes from an edge portion of the first housing 10 and is a portion assembled with the second flange 31 of the second housing 30.
  • the first flange 19 and the second flange 31 are in close contact with each other, and if the fasteners (not shown) are fastened at this portion, they can be assembled with each other.
  • the first housing 10 and the second housing 30 are assembled.
  • a second flange 31 protrudes from the second casing 30, and a plurality of second fastening holes 32 are formed through the second flange 31.
  • the second fastening holes 32 are formed in the same number at the same position as the first fastening holes 19' of the first flange 19.
  • the fastener passes through the second fastening hole 32, a part of which moves toward the first fastening hole 19' and assembles each other, and for this, the inner surfaces of the first fastening hole 19' and the second fastening hole 32 are machined Thread.
  • a cylindrical base body 34 is protruded from the second housing 30, and a swash plate 35 is provided on the base body 34.
  • the swash plate 35 is a portion that protrudes from the second housing 30 in an inclined shape, and the swash plate 35 is located in the drive space 12 when the first housing 10 and the second housing 30 are assembled to each other. Due to the inclined shape of the swash plate 35, the member rotating relative to the swash plate 35, more specifically, the cylinder block 50, the piston assembly 70, and the retainer 80 are rotated along the inclined surface 36 of the swash plate 35, and the phase is constantly A change has occurred.
  • the swash plate 35 Since the swash plate 35 is fixed to the housings 10, 30, it does not rotate by itself, but its height changes during the rotation of the relatively rotating piston assembly 70 around the circumference of the swash plate 35.
  • the swash plate 35 is integrally formed with the second housing 30, and may be separately manufactured and assembled.
  • the projecting outer surface of the swash plate 35 more specifically, the outer surface facing the cylinder block 50 has an inclined surface 36 having a first shaft hole 33 at the center thereof.
  • the first shaft hole 33 is a portion through which the drive shaft 90 passes as described below. Due to the inclined shape of the swash plate 35, the inclined surface 36 has a portion that protrudes more toward the cylinder block 50 and a portion that is less protruded.
  • the inclined surface 36 is located in the swash plate 35 in this embodiment, but the inclined surface 36 may also be located in the cylinder block 50. That is, as long as the cylinder block 50 and the inclined surface 36 are inclined with respect to each other, the outer surface of the cylinder block 50 facing the swash plate 35 can be formed to be inclined with respect to the ground.
  • a cylinder block 50 is provided at a position facing the swash plate 35.
  • the cylinder block 50 is assembled in the drive space 12 and rotates relative to the fixed housings 10, 30 and the swash plate 35.
  • the cylinder block 50 is a member that is rotated by the drive shaft 90, and has a substantially cylindrical shape as shown in Fig. 2 .
  • a second shaft hole 52 is formed in the center of the cylinder block 50, and a drive shaft 90 is fitted in the second shaft hole 52.
  • the second shaft hole 52 is connected to the first shaft hole 33.
  • the cylinder block 50 has a plurality of cylinder bores 55.
  • a piston body 71 constituting the piston assembly 70 is inserted into the cylinder bore 55.
  • the piston body 71 moves linearly along the cylinder bore 55 during which fluid is compressed or drawn in.
  • a plurality of cylinder bores 55 are formed in the circumferential direction around the center periphery of the cylinder block 50, and each cylinder block is embedded therein.
  • the cylinder bore 55 is formed of two portions having different diameters.
  • the relatively large diameter portion is the piston portion 55a into and out of the piston body 71, and the relatively small diameter portion is the fluid flow portion 55b that discharges or attracts fluid.
  • the fluid flow portion 55b is connected to the first communication groove 13 and the second communication groove 13' as described above.
  • the shape and size of the piston portion 55a and the fluid flow portion 55b can be variously changed.
  • a piston assembly 70 is provided between the cylinder block 50 and the swash plate 35.
  • the piston assembly 70 is constructed of a plurality of the same number as the cylinder bores 55 of the cylinder block 50 as described above.
  • the piston assembly 70 functions to compress or draw in fluid while entering and exiting the cylinder bore 55.
  • the piston assembly 70 is in close contact with the inclined surface 36 of the swash plate 35 by the retainer 80 as described below, and enters the inside and the outside of the cylinder bore 55 in accordance with the phase which changes during the rotation around the inclined surface 36, and performs linear reciprocating motion.
  • the piston assembly 70 can be seen that the piston assembly 70 can be roughly divided into a piston body 71, a ball joint 73, and a pressurizing unit 76.
  • the piston body 71 is a portion that linearly reciprocates inside the cylinder bore 55, and is formed in a cylindrical shape.
  • a ball joint 73 and a pressurizing unit 76 are respectively connected to both ends of the piston body 71, and move together with the piston body 71.
  • a joint mounting hole 72 is fitted to one end of the piston body 71, and an assembly projection 72' is provided at the other end.
  • the ball joint 73 is rotatably pressed into the joint mounting hole 72, and the pressurizing unit 76 is press-fitted into the assembly projection 72'.
  • the ball joint 73 is used to connect the piston body 71 with the retainer 80.
  • the ball joint 73 connects the piston body 71 and the holder 80 in a rotatable manner. More specifically, the piston connecting portion 75 on the side of the ball joint 73 is rotatably coupled to a portion of the piston body 71 facing the outer side of the cylinder bore 55, that is, the joint mounting hole 72, and the other side of the retainer is connected. The portion is rotatably coupled to the retainer aperture 82 of the retainer 80.
  • the ball joint 73 maintains a state of being freely rotatable between the retainer 80 and the piston body 71 to some extent, and thus the inclined surface of the swash plate 35 during the relative movement of the retainer 80 and the piston assembly 70 can be compensated for. 36 generated gap.
  • the piston connecting portion 75 and the retainer connecting portion of the ball joint 73 are substantially spherical and are press-fitted into the joint mounting hole 72 and the retainer hole 82, respectively. Further, balls 74 are provided at the holder connecting portion. The balls 74 are pressed into the ball press-fitting holes inside the holder connection portion and are rotatably connected. The ball 74 is a portion that is in close contact with the inclined surface 36 of the swash plate 35 by the holder 80. The balls 74 serve to reduce the friction between the ball joint 73 and the inclined surface 36 of the swash plate 35 during the rotation of the piston assembly 70.
  • the pressurizing unit 76 constituting the piston assembly 70 is coupled to the opposite side portion of the portion of the piston body 71 that is connected to the ball joint 73.
  • the assembly groove 77 formed in the pressurizing unit 76 is pressed. It is incorporated into the assembly projection 72' of the piston body 71 as described above.
  • the pressurizing unit 76 functions to pressurize the fluid in the cylinder bore 55 of the cylinder block 50.
  • the pressurizing unit 76 is a portion that substantially pushes the fluid during the movement of the piston assembly 70, and closely contacts the inner surface of the piston portion 55a of the cylinder bore 55 to strongly push the fluid.
  • the pressurizing unit 76 When water is used in the fluid, the pressurizing unit 76 is required, but in the case of using oil, the pressurizing unit 76 may be omitted.
  • the holder 80 is in close contact with the swash plate 35.
  • the holder 80 is maintained in a state of being in close contact with the inclined surface 36 of the swash plate 35, but is rotated independently of the swash plate 35.
  • the holder 80 has a disk-shaped disc main body 81 having a circular plate-like structure, and is connected to the ball joint 73 of the piston assembly 70 to serve to closely contact the piston assembly 70 with the inclined surface of the swash plate 35.
  • the role of 36 That is, the retainer 80 holds the ball joint 73 of the piston assembly 70, preventing the ball joint 73 from being detached from the swash plate 35.
  • the holder 80 is rotatably coupled to a central portion of the swash plate 35.
  • the holder 80 is rotatable at a constant inclination angle corresponding to the inclined surface 36 of the swash plate 35 without swaying. That is, the holder 80 is rotated in a state of being kept parallel to the inclined surface 36 of the swash plate 35.
  • the retainer 80 can be prevented from arbitrarily rotating or tilting about other axes of rotation that are independent of the basic axis of rotation during operation of the pump.
  • the rotary joint 88 is embedded in the edge of the center hole 83 of the retainer 80.
  • the rotary joint 88 may be attached to the swash plate 35 as a separate member from the swash plate 35, or may be integrally formed with the swash plate 35.
  • the retainer 80 is assembled to the swash plate 35 in such a manner that the rotary joint 88 is fitted into the center hole 83 of the retainer 80.
  • a plurality of holder holes 82 are formed in the circumferential direction around the center hole 83.
  • the retainer connection of the ball joint 73 is embedded in the retainer bore 82.
  • the retainer bore 82 extends through the retainer 80, and when the retainer attachment portion is embedded in the retainer bore 82, the ball 74 of the retainer attachment portion passes through the retaining bore 82, and the inclined face 36 of the swash plate 35 contact. Such a state is shown in FIG.
  • Reference numeral 90 denotes a drive shaft 90.
  • a drive connecting portion 92 located on one side of the shaft main body 91 is connected to a driving portion (not shown) such as a motor and receives a rotational force, and the other cylinder connecting portion 93 is coupled to the cylinder block 50.
  • the connection and transmission of the rotational force of the driving portion to the cylinder block 50 are performed.
  • the drive coupling portion 92 is in a state of protruding toward the outside of the housings 10, 30.
  • the housings 10, 30, the cylinder block 50, the piston assembly 70 and the retainer 80 may each be made of a synthetic resin material. That is to say, they can all be assembled after being produced by injection molding.
  • the synthetic resin material is easily formed, and each member can be elastically deformed to some extent, making assembly by press-in easier.
  • the drive unit rotates the drive shaft 90.
  • the drive shaft 90 is rotated in the direction of the arrow 1
  • the cylinder block 50 fixed to the drive shaft 90 rotates together.
  • the cylinder block 50 rotates in the same direction as the drive shaft 90, and arrow 2 indicates the rotational direction of the cylinder block 50.
  • the rotation axis of the cylinder block 50 becomes the drive shaft 90.
  • the piston assembly 70 inserted in the cylinder block 50 rotates together. Since the piston body 71 of the piston assembly 70 is inserted into the cylinder bore 55 of the cylinder block 50, the piston assembly 70 also rotates together with the rotation of the cylinder block 50. The piston assembly 70 inserted into the plurality of cylinder bores 55 is simultaneously rotated.
  • the retainer 80 coupled to the piston assembly 70 also rotates.
  • the ball joint 73 of the piston assembly 70 is coupled to the retainer 80 while being coupled to the piston body 71.
  • the piston assembly 70 rotates the retainer 80.
  • the holder joints of the ball joints 73 are respectively pressed into the holder holes 82 of the holder 80 and are rotatable. Since the holder 80 is rotatable independently of the swash plate 35, it rotates relative to the fixed swash plate 35. Arrow 3 indicates the direction of rotation of the holder 80.
  • the holder 80 When the holder 80 is rotated, the holder 80 is rotated at an angle that is parallel to the inclined surface 36 of the swash plate 35.
  • the reason for this is that the retainer 80 maintains a state of being in close contact with the swash plate 35 through the rotary joint 88, with the result that the retainer 80 does not rattle during the rotation to have a certain value corresponding to the inclined surface 36 of the swash plate 35. Rotate with the tilt angle. Therefore, it is possible to prevent the holder 80 from being arbitrarily rotated or tilted about another rotation axis independent of the basic rotation axis during the operation of the pump.
  • the piston assembly 70 undergoes a compression/extension motion during which the fluid is compressed or drawn in.
  • the fluid present in the cylinder bore 55 is compressed during the ascent of the piston assembly 70 and discharged through the first communication port 13 through the first port 18a.
  • the descending piston assembly 70 draws fluid through the second port 18c to the inside of the second communication groove 13', thereby being prepared to be compressed in the next process.
  • the first port 18a or the second port 18c of the housing 10, 30 can be switched to the inlet or outlet of the fluid. That is, when the cylinder block 50 is rotated in the clockwise direction with reference to the specific piston assembly 70, the piston assembly 70 performs a compression motion, and when the cylinder block 50 rotates counterclockwise, the piston assembly 70 performs an extension motion. Thereby, the first port 18a and the second port 18c are switched in direction by discharging or sucking in fluid. This is an advantage obtained when the swash plate 35 is fixed and the cylinder block 50 is rotated, and has an advantage that the direction in which the oil pressure is formed can be easily switched by switching the rotation direction of the drive shaft 90.
  • the retainer connecting portion of the ball joint 73 is provided with balls 74, and the balls 74 are in close contact with the inclined surface 36 of the swash plate 35.
  • the balls 74 are press-fitted into the ball press-fitting holes provided inside the holder connecting portion and rotatably connected, and the balls 74 serve to reduce the ball joint 73 and the swash plate 35 during the rotation of the piston assembly 70. The effect of friction between the inclined faces 36.
  • the fluid pump of the present invention is capable of rotatably coupling the piston in close contact with the swash plate to the swash plate, thereby rotating in close contact with the inclined surface of the swash plate while maintaining a certain rotation angle. Therefore, during the movement of the pump, it is possible to prevent the retainer from being arbitrarily rotated or tilted around the other rotating shafts which are not related to the basic rotating shaft, thereby preventing the wear occurring in the process and having an effect of improving durability.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)

Abstract

L'invention concerne une pompe à fluide qui comporte : une enveloppe (10, 30) dans laquelle un espace d'entraînement (12) est formé ; un plateau oscillant (35) situé dans l'espace d'entraînement (12) de l'enveloppe (10, 30), le plateau oscillant étant retenu en un état fixe et présentant une surface inclinée (36) ; un bloc-cylindres (50) situé à l'intérieur de l'espace d'entraînement (12) et pouvant tourner par l'intermédiaire d'un arbre d'entraînement (90), une pluralité de trous de cylindre (55) s'étendant dans la même direction que l'arbre d'entraînement (90) à l'intérieur du bloc-cylindres (50) ; un ensemble d'une pluralité de pistons (70), au moins une partie de l'ensemble piston (70) étant introduite à l'intérieur des trous de cylindre (55) du bloc-cylindres (50), effectuant un déplacement linéaire à l'intérieur des trous de cylindre (55) lorsque le bloc-cylindres (50) tourne, et une extrémité de l'ensemble piston ayant un joint à rotule (73) ; un support discoïde (80) combiné au plateau oscillant (35) et maintenant un contact étroit avec la surface inclinée (36), le support discoïde (80) pouvant tourner indépendamment du plateau oscillant (35), le support discoïde (80) étant relié au joint à rotule (73) de l'ensemble piston (70), et le support discoïde (80) tournant conjointement avec l'ensemble piston (70) lorsque l'ensemble piston (70) est en contact étroit avec la surface inclinée (36) du plateau oscillant (35). Pendant le mouvement de la pompe à fluide, l'usure du support (80) est réduite, ainsi que le bruit.
PCT/CN2018/112844 2018-02-01 2018-10-31 Pompe à fluide WO2019148911A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201810101727.7A CN108131266B (zh) 2018-02-01 2018-02-01 流体泵
CN201810101727.7 2018-02-01

Publications (1)

Publication Number Publication Date
WO2019148911A1 true WO2019148911A1 (fr) 2019-08-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/112844 WO2019148911A1 (fr) 2018-02-01 2018-10-31 Pompe à fluide

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CN (1) CN108131266B (fr)
WO (1) WO2019148911A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108131266B (zh) * 2018-02-01 2019-08-30 李涌权 流体泵
US10670003B1 (en) * 2019-10-24 2020-06-02 CW Holdings Ltd. Tilt linkage for variable stroke pump

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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