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CN-224214312-U - Plunger piston shoe assembly

CN224214312UCN 224214312 UCN224214312 UCN 224214312UCN-224214312-U

Abstract

The utility model discloses a plunger sliding shoe assembly, which comprises a plunger rod and a sliding shoe, wherein a ball head is fixed at one end of the plunger rod, close to the sliding shoe, a hemispherical groove is formed in one side, close to the plunger rod, of the sliding shoe, a detachable annular plate is fixedly connected to one side, close to the plunger rod, of the sliding shoe, the ball head is positioned in the annular plate and the hemispherical groove, the annular plate is formed by splicing two symmetrical semicircular rings, and a plurality of grooves are formed in the outer side wall of the sliding shoe. According to the utility model, the plunger rod, the ball head, the sliding shoe, the annular plate and the inner hexagon bolts are arranged, the annular plate is formed by splicing two semicircular rings, the semicircular rings are fixed on the side face of the sliding shoe through the inner hexagon bolts, the ball head on the plunger rod can be limited in the hemispherical groove of the sliding shoe through the annular plate, when a large gap is generated between the ball head and the hemispherical groove due to friction, the ball head is conveniently taken out of the hemispherical groove in a mode of disassembling the semicircular rings, the sliding shoe or the plunger rod and the ball head are replaced, and the use cost is reduced.

Inventors

  • WENG CHUNJIE
  • GU JIANJIAN

Assignees

  • 嘉兴太平洋江茂电子有限公司
  • 浙江远铭精密机械有限公司

Dates

Publication Date
20260508
Application Date
20250729

Claims (7)

  1. 1. A plunger sliding shoe assembly comprises a plunger rod (1) and a sliding shoe (3) and is characterized in that a ball head (2) is fixed at one end, close to the sliding shoe (3), of the plunger rod (1), a hemispherical groove (31) is formed in one side, close to the plunger rod (1), of the sliding shoe (3), a detachable annular plate (4) is fixedly connected to one side, close to the plunger rod (1), of the sliding shoe (3), the ball head (2) is located inside the annular plate (4) and the hemispherical groove (31), the annular plate (4) is formed by splicing two symmetrical semicircular rings (41), a plurality of grooves (33) are formed in the outer side wall of the sliding shoe (3), and balls (34) are rotatably connected inside the grooves (33).
  2. 2. The plunger piston shoe assembly of claim 1, wherein a negative pressure cavity (101) is formed in one end, far away from the ball head (2), of the plunger rod (1), a flow channel (102) communicated with the negative pressure cavity (101) is formed in the middle of the ball head (2), and an oil hole (35) communicated with the flow channel (102) is formed in the middle of the sliding shoe (3).
  3. 3. The plunger shoe assembly of claim 2, wherein the oil hole (35) is provided with a second bell mouth (36) near one end of the flow passage (102), and the flow passage (102) is provided with a first bell mouth (103) near one end of the oil hole (35).
  4. 4. The plunger sliding shoe assembly according to claim 1, wherein a plurality of annular grooves are formed in the outer side wall of the plunger rod (1) in an equidistant mode, and a sealing ring (6) is clamped in each annular groove.
  5. 5. A plunger shoe assembly as claimed in claim 1, wherein a plurality of said grooves (33) are equidistantly arranged on the surface of the shoe (3).
  6. 6. The plunger piston shoe assembly of claim 1, wherein two thread grooves (32) are formed in one side, close to the annular plate (4), of the piston shoe (3), screw holes (42) are formed in positions, close to the thread grooves (32), of each semicircular ring (41), and inner hexagon bolts (5) are connected inside the screw holes (42) and the corresponding thread grooves (32) together.
  7. 7. The plunger piston shoe assembly of claim 6, wherein a sinking groove (43) is formed in the position, close to the inner hexagon bolt (5), of the surface of the semicircular ring (41), and a nut of the inner hexagon bolt (5) is located inside the sinking groove (43).

Description

Plunger piston shoe assembly Technical Field The utility model relates to the technical field of plunger pumps, in particular to a plunger sliding shoe assembly. Background The plunger piston shoe component is a core movement component in an axial plunger pump and a motor, is formed by precisely matching two parts of a plunger and a piston shoe, and is mainly used for realizing the conversion of reciprocating movement and rotary movement and simultaneously transmitting high-pressure oil power. The working principle is that the plunger makes linear reciprocating motion in the cylinder hole, and the axial thrust is converted into rotary torque through the contact of the sliding shoes and the sloping cam plate. The sliding shoes are usually made of copper alloy or steel-based composite materials, the bottom surface is arc-shaped to reduce friction and abrasion with a swash plate, and efficient operation is realized through a static pressure support or oil film lubrication technology. The sliding shoe of the existing plunger sliding shoe is of an integral structure generally, a ball head on the plunger is located in a spherical groove of the sliding shoe, when a return disc of the plunger pump drives the sliding shoe to move, the sliding shoe can drive the ball head and the plunger to move, but after the plunger sliding shoe is used for a long time, gaps between the ball head and the spherical groove of the sliding shoe become large due to friction, and at the moment, the whole sliding shoe and the plunger can only be replaced, so that the use cost is increased. Second, friction is also generated between the return disc and the outer sidewall of the slipper during rotation. Accordingly, in view of the above-mentioned shortcomings, the present utility model proposes a plunger shoe assembly. Disclosure of utility model The utility model aims to solve the defects in the prior art and provides a plunger sliding shoe assembly. In order to achieve the purpose, the plunger sliding shoe assembly comprises a plunger rod and a sliding shoe, wherein a ball head is fixed at one end of the plunger rod, close to the sliding shoe, a hemispherical groove is formed in one side, close to the plunger rod, of the sliding shoe, a detachable annular plate is fixedly connected to one side, close to the plunger rod, of the sliding shoe, the ball head is located inside the annular plate and the hemispherical groove, the annular plate is formed by splicing two symmetrical semicircular rings, a plurality of grooves are formed in the outer side wall of the sliding shoe, and balls are rotatably connected inside each groove. Further, a negative pressure cavity is arranged at one end, far away from the ball head, of the plunger rod, a flow channel communicated with the negative pressure cavity is arranged in the middle of the ball head, and an oil hole communicated with the flow channel is arranged in the middle of the sliding shoe. Further, a second bell mouth is arranged at one end, close to the flow channel, of the oil hole, and a first bell mouth is arranged at one end, close to the oil hole, of the flow channel. Furthermore, the outer side wall of the plunger rod is equidistantly separated from the plunger rod to form a plurality of annular grooves, and sealing rings are clamped inside the annular grooves. Further, a plurality of grooves are equidistantly arranged on the surface of the slipper. Further, two thread grooves are formed in one side, close to the annular plate, of the sliding shoe, screw holes are formed in the positions, close to the thread grooves, of each semicircular ring, and inner hexagon bolts are connected inside the screw holes and the corresponding thread grooves. Further, a sinking groove is formed in the surface of the semicircular ring and close to the inner hexagon bolt, and a nut of the inner hexagon bolt is located inside the sinking groove. The utility model has the beneficial effects that: 1. When the plunger sliding shoe assembly is used, the plunger rod, the ball head, the sliding shoe, the annular plate and the inner hexagonal bolt are arranged, the annular plate is formed by splicing two semicircular rings, the semicircular rings are fixed on the side face of the sliding shoe through the inner hexagonal bolts, the ball head on the plunger rod can be limited in the hemispherical groove of the sliding shoe through the annular plate, when a large gap is generated between the ball head and the hemispherical groove due to friction, the ball head can be conveniently taken out of the hemispherical groove in a mode of disassembling the semicircular rings, the sliding shoe or the plunger rod and the ball head are replaced, and the use cost is reduced. 2. When the plunger piston shoe assembly is used, the piston shoes are arranged, the outer side walls of the piston shoes are provided with a plurality of balls at equal intervals, and when the return disc of the plunger pump rotates with the piston shoes, the ball