Plunger piston shoe assembly

Abstract

The plunger and sliding shoe assembly comprises a plunger rod and a sliding shoe, a ball head is fixed to the end, close to the sliding shoe, of the plunger rod, a hemispherical groove is formed in the side, close to the plunger rod, of the sliding shoe, a detachable annular plate is fixedly connected to the side, close to the plunger rod, of the sliding shoe, and the ball head is located 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. The plunger rod, the ball head, the sliding shoe, the annular plate and the inside hexagonal bolt are arranged, the annular plate is formed by splicing the two semicircular rings, the semicircular rings are fixed to the side face of the sliding shoe through the inside hexagonal bolt, the ball head on the plunger rod can be limited in the semispherical groove of the sliding shoe through the annular plate, and when a large gap is generated due to friction between the ball head and the semispherical groove, the sliding shoe can be fixed to the piston rod through the annular plate. And the ball head can be conveniently taken out from the hemispherical groove by disassembling the semicircular ring, so that the piston shoe or the plunger rod and the ball head can be conveniently replaced, and the use cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of plunger pump technology, and in particular to a plunger slipper assembly. Background Technology

[0002] The plunger slipper assembly is a core moving component in axial piston pumps and motors. It consists of a plunger and a slipper that fit together precisely, primarily used to convert reciprocating motion into rotary motion while transmitting high-pressure hydraulic power. Its working principle is as follows: the plunger performs linear reciprocating motion within the cylinder bore, and through contact with the swashplate via the slipper, the axial thrust is converted into rotational torque. The slipper is typically made of copper alloy or steel-based composite material, with an arc-shaped bottom surface to reduce friction and wear with the swashplate, and achieves efficient operation through hydrostatic support or oil film lubrication technology.

[0003] Existing plunger slides are generally integral structures, with the ball head of the plunger located inside the spherical groove of the slide. The slide can only move the ball head and plunger when the return plate of the plunger pump moves the slide. However, after prolonged use, friction causes the gap between the ball head and the spherical groove of the slide to widen, requiring the replacement of the entire slide and plunger, increasing operating costs. Furthermore, friction also occurs when the return plate rotates against the outer wall of the slide. Therefore, to address these shortcomings, this invention proposes a plunger slide assembly. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a plunger slipper assembly.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a plunger slipper assembly, comprising a plunger rod and a slipper, wherein a ball head is fixed to one end of the plunger rod near the slipper, a hemispherical groove is formed on one side of the slipper near the plunger rod, and a detachable annular plate is fixedly connected to one side of the slipper near the plunger rod, the ball head is located inside the annular plate and the hemispherical groove, the annular plate is composed of two symmetrical semicircular rings spliced ​​together, and multiple grooves are formed on the outer wall of the slipper, and a ball is rotatably connected inside each groove.

[0006] Furthermore, the plunger rod has a negative pressure chamber at the end away from the ball head, a flow channel communicating with the negative pressure chamber is opened in the middle of the ball head, and an oil hole communicating with the flow channel is opened in the middle of the slipper.

[0007] Furthermore, the oil hole is provided with a second flared opening at one end near the flow channel, and the flow channel is provided with a first flared opening at one end near the oil hole.

[0008] Furthermore, the outer wall of the plunger rod is provided with multiple annular grooves at equal intervals, and a sealing ring is engaged inside each annular groove.

[0009] Furthermore, the plurality of grooves are arranged at equal intervals on the surface of the slipper.

[0010] Furthermore, the slipper has two threaded grooves on the side near the annular plate, and each semicircular ring has a threaded hole near the threaded groove. The threaded hole and the corresponding threaded groove are connected to an internal hex bolt.

[0011] Furthermore, a groove is formed on the surface of the semi-circular ring near the hexagon socket head cap screw, and the nut of the hexagon socket head cap screw is located inside the groove.

[0012] The beneficial effects of this utility model are:

[0013] 1. In use, this utility model provides a plunger slide shoe assembly comprising a plunger rod, a ball head, a slide shoe, an annular plate, and an internal hex bolt. The annular plate is composed of two semicircular rings joined together, which are fixed to the side of the slide shoe by the internal hex bolt. The annular plate can limit the ball head on the plunger rod to be within the hemispherical groove of the slide shoe. When a large gap is generated between the ball head and the hemispherical groove due to friction, it is easy to remove the ball head from the hemispherical groove by disassembling the semicircular rings. This facilitates the replacement of the slide shoe, plunger rod, or ball head, reducing the cost of use.

[0014] 2. In use, this utility model is a plunger slipper assembly with a slipper and multiple balls evenly spaced on the outer side wall of the slipper. When the return plate of the plunger pump rotates with the slipper, the balls can reduce the friction between the return plate and the slipper, thereby reducing wear. Attached Figure Description

[0015] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 : Overall sectional view of this utility model;

[0017] Figure 2 : A three-dimensional view of the ski boot of this utility model;

[0018] Figure 3 : A three-dimensional view of the annular plate of this utility model;

[0019] Figure 4 The present utility model Figure 1 Enlarged view of point A in the middle.

[0020] The attached figures are labeled as follows:

[0021] 1. Piston rod; 101. Negative pressure chamber; 102. Flow channel; 103. First flared end; 2. Ball head; 3. Slipper; 31. Hemispherical groove; 32. Threaded groove; 33. Groove; 34. Ball; 35. Oil hole; 36. Second flared end; 4. Annular plate; 41. Semicircular ring; 42. Threaded hole; 43. Countersunk groove; 5. Socket head cap bolt; 6. Sealing ring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figures 1-4 As shown, a plunger slipper assembly is disclosed, including a plunger rod 1 and a slipper 3. A ball head 2 is fixed to one end of the plunger rod 1 near the slipper 3. A hemispherical groove 31 is provided on the side of the slipper 3 near the plunger rod 1. A detachable annular plate 4 is fixedly connected to the side of the slipper 3 near the plunger rod 1. The ball head 2 is located inside the annular plate 4 and the hemispherical groove 31. The annular plate 4 is composed of two symmetrical semicircular rings 41 spliced ​​together. A plurality of grooves 33 are provided on the outer wall of the slipper 3, and a ball bearing 34 is rotatably connected inside each groove 33.

[0024] The plunger rod 1 has a negative pressure chamber 101 at the end away from the ball head 2, the ball head 2 has a flow channel 102 in the middle that communicates with the negative pressure chamber 101, and the slipper 3 has an oil hole 35 in the middle that communicates with the flow channel 102.

[0025] By setting up flow channel 102 and oil hole 35, the negative pressure chamber 101 is connected to flow channel 102 and oil hole 35, providing space for hydraulic oil to flow. The specific working principle is the same as that of existing technology.

[0026] The oil hole 35 is provided with a second flared mouth 36 at one end near the flow channel 102, and the flow channel 102 is provided with a first flared mouth 103 at one end near the oil hole 35.

[0027] When the slipper 3 rotates with the return plate, the oil hole 35 and the flow channel 102 are inclined, and the contact space between the flow channel 102 and the oil hole 35 is increased by the second horn 36 and the first horn 103, ensuring that the oil hole 35 is always connected to the flow channel 102.

[0028] Multiple annular grooves are evenly spaced on the outer wall of the plunger rod 1, and a sealing ring 6 is engaged inside each annular groove.

[0029] By setting the sealing ring 6, the sealing performance between the plunger rod 1 and the inner wall of the plunger pump cylinder can be increased.

[0030] Multiple grooves 33 are arranged at equal intervals on the surface of the slipper 3.

[0031] By equidistantly setting the balls 34, when the return disc rotates on the surface of the slipper 3, the balls 34 can reduce the friction between the slipper 3 and the return disc, thereby increasing the service life.

[0032] The slipper 3 has two threaded grooves 32 on the side near the annular plate 4. Each semicircular ring 41 has a screw hole 42 near the threaded groove 32. The screw hole 42 and the corresponding threaded groove 32 are connected to an internal hex bolt 5.

[0033] When installing the semi-circular ring 41, place the semi-circular ring 41 onto the surface of the ball head 2, ensuring that the screw hole 42 on the semi-circular ring 41 aligns with the threaded groove 32 on the slipper 3. Then, screw in the hexagon socket head cap screw 5 into the threaded groove 32 and the screw hole 42 to install and fix the semi-circular ring 41. At this point, the slipper 3 can pull or push the ball head 2 and the plunger rod 1 to move.

[0034] When it is necessary to disassemble the semi-circular ring 41, simply unscrew the internal hex bolt 5 from the threaded groove 32 and the screw hole 42.

[0035] A groove 43 is provided on the surface of the semi-circular ring 41 near the socket head cap bolt 5, and the nut of the socket head cap bolt 5 is located inside the groove 43.

[0036] By setting a recess 43, when the hexagon socket bolt 5 is screwed into the screw hole 42, the nut of the hexagon socket bolt 5 is located inside the recess 43, thereby ensuring that the surface of the annular plate 4 is flat.

[0037] Working principle: When assembling this component, first insert the ball head 2 on the plunger rod 1 into the hemispherical groove 31 of the slipper 3. Then, fit two semicircular rings 41 onto the surface of the ball head 2, so that the two semicircular rings 41 are spliced ​​together to form an annular plate 4, and fit the annular plate 4 into the slipper 3. Subsequently, screw in the hexagonal socket head cap screws 5 into the screw holes 42 on the semicircular rings 41 and the threaded grooves 32 on the slipper 3 to fix the semicircular rings 41. At this time, the ball head 2 can rotate inside the hemispherical groove 31 and the annular plate 4, and the ball head 2 will not detach from the hemispherical groove 31. The installation principle of this component and the plunger pump is the same as that of existing technology.

[0038] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A plunger slipper assembly, comprising a plunger rod (1) and a slipper (3), characterized in that: The plunger rod (1) has a ball head (2) fixed at one end near the slipper (3). The slipper (3) has a hemispherical groove (31) on the side near the plunger rod (1). A detachable annular plate (4) is fixedly connected to the side of the slipper (3) near the plunger rod (1). The ball head (2) is located inside the annular plate (4) and the hemispherical groove (31). The annular plate (4) is composed of two symmetrical semicircular rings (41) spliced ​​together. The outer wall of the slipper (3) has multiple grooves (33), and each groove (33) is rotatably connected to a ball (34).

2. The plunger slipper assembly according to claim 1, characterized in that: The plunger rod (1) has a negative pressure chamber (101) at the end away from the ball head (2), the ball head (2) has a flow channel (102) in the middle that communicates with the negative pressure chamber (101), and the slipper (3) has an oil hole (35) in the middle that communicates with the flow channel (102).

3. A plunger slipper assembly according to claim 2, characterized in that: The oil hole (35) is provided with a second flared mouth (36) at one end near the flow channel (102), and the flow channel (102) is provided with a first flared mouth (103) at one end near the oil hole (35).

4. A plunger slipper assembly according to claim 1, characterized in that: The plunger rod (1) has multiple annular grooves at equal intervals on its outer side wall, and each annular groove is fitted with a sealing ring (6).

5. A plunger slipper assembly according to claim 1, characterized in that: The plurality of grooves (33) are arranged at equal intervals on the surface of the slipper (3).

6. A plunger slipper assembly according to claim 1, characterized in that: The slipper (3) has two threaded grooves (32) on the side near the annular plate (4). Each semicircular ring (41) has a screw hole (42) near the threaded groove (32). The screw hole (42) and the corresponding threaded groove (32) are connected together by an internal hex bolt (5).

7. A plunger slipper assembly according to claim 6, characterized in that: A groove (43) is provided on the surface of the semi-circular ring (41) near the internal hexagonal bolt (5), and the nut of the internal hexagonal bolt (5) is located inside the groove (43).

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