CN113664088A

CN113664088A - Plunger piston shoe closing-in tool

Info

Publication number: CN113664088A
Application number: CN202111088032.8A
Authority: CN
Inventors: 孔青松; 孟嘉嘉; 刘伟; 李航; 刘宝林; 焦文华; 王亚飞; 赵亮; 王轩; 王刘朝
Original assignee: Henan Aerospace Hydraulic and Pneumatic Technology Co Ltd
Current assignee: Henan Aerospace Hydraulic and Pneumatic Technology Co Ltd
Priority date: 2021-09-16
Filing date: 2021-09-16
Publication date: 2021-11-19
Anticipated expiration: 2041-09-16
Also published as: CN113664088B

Abstract

The invention provides a plunger piston shoe closing tool which comprises a shell provided with an outlet and a hydraulic oil inlet; a piston and a piston shoe are arranged in the shell, a plunger is arranged in the piston in a penetrating manner, and the piston shoe is tightly propped against the shell by a ball head of the plunger; a forming sleeve is arranged between the piston and the sliding shoe, and the piston extrudes the sliding shoe through the forming sleeve. The pressure is applied to the sliding shoe in a hydraulic mode, the pressure application process is easier to control, and the tool is simple in structure, small in size and not easy to break down; the shell, the gland and the piston are universal parts, so that the tool can be suitable for products of various specifications, and waste caused by the fact that the tool is too exclusive can be avoided; by arranging the forming sleeve, the pressure of the hydraulic oil pushing piston is better transmitted, and the forming of the sliding shoe is promoted; the product is prevented from being excessively deformed by the limiting pad, and the sliding shoe and the piston are positioned so as not to be tilted during assembly; through setting up the ejector pin, the back of shore plunger prevents the reverse movement of the in-process plunger of exerting pressure.

Description

Plunger piston shoe closing-in tool

Technical Field

The invention relates to the field of pumps, in particular to a plunger piston shoe closing-in tool.

Background

The plunger piston shoe is a component part of a hydraulic pump, and is particularly suitable for an axial plunger type hydraulic pump. Before the plunger piston shoe is installed in the plunger pump, the plunger piston shoe needs to be closed, and deformation is caused by extrusion of the piston shoe, so that the ball head of the plunger is contained by the piston shoe and the rotation of the plunger is not hindered. The existing closing-in tool is large in size and easy to damage, the sliding shoe is pressed in a mechanical pressing mode, and the pressing process is not well controlled.

Disclosure of Invention

Aiming at the technical problem, the invention provides a plunger piston shoe closing-in tool, which is used for solving the problem that the mechanical pressing process of the plunger piston shoe closing-in tool in the prior art is difficult to control.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a plunger piston shoe closing-in tool comprises a shell provided with an outlet and a hydraulic oil inlet; a piston and a piston shoe are arranged in the shell, a plunger is arranged in the piston in a penetrating manner, and the piston shoe is tightly propped against the shell by a ball head of the plunger; a forming sleeve is arranged between the piston and the sliding shoe, and the piston extrudes the sliding shoe through the forming sleeve.

Preferably, the forming sleeve is sleeved on the plunger, and the forming sleeve is positioned between the piston and the plunger.

Preferably, the forming sleeve is provided with an inwardly inclined ramp at an end thereof adjacent the shoe and presses the shoe via the ramp.

Preferably, the forming sleeve comprises two symmetrical semi-forming sleeves.

Preferably, the sliding shoe is sleeved with a limiting pad, and the limiting pad is abutted to the end part of the piston.

Preferably, the spacing pad comprises two symmetrical semi-spacing pads.

Preferably, the shell is connected with a gland, a push rod penetrates through the gland, and the plunger is tightly pressed against the sliding shoe by the push rod.

Preferably, one end of the ejector rod, which is positioned on the outer side of the gland, is in threaded connection with a locking nut.

Preferably, the hydraulic oil inlet of the shell is connected with an oil inlet joint.

Preferably, the shell is provided with a limiting groove for limiting the sliding shoe.

The invention has the beneficial effects that: the pressure is applied to the sliding shoe in a hydraulic mode, the pressure application process is easier to control, and the tool is simple in structure, small in size and not easy to break down; by arranging the forming sleeve and arranging the inward inclined plane in the forming sleeve to be abutted against the sliding shoe, the pressure of the hydraulic oil pushing piston is better transmitted, and the forming of the sliding shoe is promoted; the shell, the gland and the piston are universal parts, so that the tool can be suitable for products of various specifications, and waste caused by the fact that the tool is too exclusive can be avoided; by arranging the limiting pad, on one hand, the transitional movement of the piston is limited, so that the transitional deformation of a product is prevented, and on the other hand, the sliding shoe and the piston are positioned simultaneously, so that the sliding shoe and the piston are not inclined during assembly; through setting up the ejector pin, the back of shore plunger prevents the reverse movement of the in-process plunger of exerting pressure.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a piston according to the present invention;

fig. 3 is a schematic structural view of a forming sleeve of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.

As shown in fig. 1 to 3, a plunger piston shoe closing tool according to an embodiment of the present invention includes a housing 1 having an outlet and a hydraulic oil inlet; a piston 4 and a sliding shoe 10 are arranged in the shell 1, and an O-shaped ring gasket 11 is arranged on the contact surface of the piston 4 and the shell to play a role in sealing; a plunger 9 penetrates through the piston 4, and a ball head of the plunger 9 tightly supports the sliding shoe 10 against the shell 1; a forming sleeve 3 is arranged between the piston 4 and the slipper 10, and the piston 4 presses the slipper 10 through the forming sleeve 3. Wherein, the outer diameter of the part of the piston 4 close to the sliding shoe 10 is larger than that of the other part, and the transition connecting section of the two parts corresponds to the hydraulic oil inlet of the shell 1. When hydraulic oil generates hydraulic pressure on the piston 4 after entering the shell 1, the piston 4 moves towards one end of the sliding shoe 10 under the action of the stress area difference on the piston 4, the sliding shoe 10 is extruded through the forming sleeve 3 to cause deformation, and the sliding shoe 10 well contains the ball head of the plunger 9. The outlet of the shell 1 is arranged at a position near the sliding shoe 10, so that gas in the shell 1 is discharged from the outlet in the extrusion process, and the condition of insufficient pressure caused by air holding is prevented; a through hole is designed at the position where the bottom of the shell 1 is tightly abutted to the sliding shoe 10, so that the sliding shoe 10 is prevented from being difficult to take out when the deformation is too large. The invention applies pressure to the sliding shoe in a hydraulic mode, the pressure applying process is easier to control, and the tool has the advantages of simple structure, small volume and difficult failure. In addition, casing 1 and piston 4 are general, and applicable product in multiple specification is used and can be avoided the frock too exclusive waste that causes. In this embodiment, the transition connection section is a stepped structure, and the stepped structure is arranged next to the portion with the larger outer diameter of the piston, so as to increase the force bearing area difference between the two portions.

Preferably, the forming sleeve 3 is sleeved on the plunger 9, and the forming sleeve 3 is located between the piston 4 and the plunger 9. Specifically, a plunger hole 41 matched with the plunger 9 is arranged on the inner side of the part with the smaller outer diameter of the piston 4, a forming sleeve hole 42 is arranged on the inner side of the part with the larger outer diameter of the piston 4, the plunger hole 41 and the forming sleeve hole 42 are coaxial and communicated, the inner diameter of the forming sleeve hole 42 is larger than that of the plunger hole 41, the plunger 9 penetrates through the plunger hole 41 and the forming sleeve hole 42, and the forming sleeve 3 is positioned in the forming sleeve hole 42 and sleeved on the plunger 9.

Preferably, the forming sleeve 3 is provided with an inwardly inclined ramp 31 at its end adjacent the shoe 10 and presses the shoe 10 via the ramp. Specifically, one end of the forming sleeve 3 close to the slipper 10 is provided with a conical opening, the small end of the conical opening faces the plunger 9 and protrudes inwards, the large end of the conical opening faces the slipper 10, and the inner wall surface of the conical opening is a bevel 31. The pressure of hydraulic oil pushing the piston is better transmitted by the inclined surface 31 pressing the sliding shoe 10, and the forming of the sliding shoe is promoted.

Preferably, the forming sleeve 3 comprises two symmetrical semi-forming sleeves, facilitating assembly and disassembly. And, the shaping cover 3 can carry out serialization design to be applicable to multiple product needs, and need not carry out big design to whole frock, saved the cost greatly.

Preferably, the sliding shoe 10 is sleeved with a limit pad 2, and the limit pad 2 abuts against the end of the piston 4. The end part of the piston 4 is provided with a limiting pad groove 43, the limiting pad 2 is partially positioned in the limiting pad groove 43, and a certain gap is reserved between one side of the limiting pad 2 far away from the piston 4 and the shell 1 and the sliding shoe 10. The limiting pad has the effects of limiting the transitional movement of the piston 4 and preventing the transitional deformation of the product; secondly, the slipper 10 and the piston 4 are positioned at the same time so as to be convenient for assembling in the shell 1 without tilting. When the piston type sliding shoe shaping machine is used, after the compression amount generated by the movement of the piston 4 reaches the limiting pad 2, the pressure is maintained for a certain time to shape the sliding shoe 10.

Preferably, the limiting pad 2 comprises two symmetrical semi-limiting pads, so that the assembly and the disassembly are convenient.

Preferably, the housing 1 is connected with a gland 6, the gland 6 is riveted with the housing 1 or connected with the housing 1 through a screw, a push rod 7 penetrates through the gland 6, and the push rod 7 tightly pushes the plunger 9 against the sliding shoe 10. The gland 6 is provided with a through hole for the ejector rod 7 to pass through, the gland 6 is also provided with a gland piston hole capable of accommodating part of the piston 4, and the gland piston hole is communicated with the through hole; the walls of the gland piston bore extend outwardly with this extension being between the piston 4 and the housing 1. The contact surface of the hole wall of the gland piston hole and the piston 4 and the contact surface of the extension part and the shell 1 are sealed by an O-shaped gasket 11. Gland 6 also is general, and applicable product in multiple specification is used and can be avoided the frock too exclusive extravagant that causes. In this embodiment, above-mentioned perforation is the internal thread hole, sets up external screw thread and 6 threaded connection of gland on the ejector pin 7, the dismouting of being convenient for.

Preferably, one end of the ejector rod 7, which is located outside the gland 6, is in threaded connection with a lock nut 8 for fixing the ejector rod 7 and preventing the ejector rod from being displaced under the action of hydraulic pressure.

Preferably, be connected with oil feed joint 5 on the hydraulic oil import of casing 1, oil feed joint 5 and casing 1's hydraulic oil import threaded connection, the dismouting of being convenient for.

Preferably, the housing 1 is provided with a limiting groove for limiting the sliding shoe 10 to prevent the sliding shoe from displacing. The through holes are threaded holes and are formed in the bottom of the limiting groove, so that the sliding shoes 10 are prevented from being difficult to take out of the limiting groove when being deformed too much.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A plunger piston shoe closing-in tool is characterized by comprising a shell (1) provided with an outlet and a hydraulic oil inlet; a piston (4) and a sliding shoe (10) are arranged in the shell (1), a plunger (9) penetrates through the piston (4), and the ball head of the plunger (9) tightly supports the sliding shoe (10) against the shell (1); a forming sleeve (3) is arranged between the piston (4) and the sliding shoe (10), and the piston (4) extrudes the sliding shoe (10) through the forming sleeve (3).

2. The plunger piston shoe necking-in tool according to claim 1, wherein the forming sleeve (3) is sleeved on the plunger (9), and the forming sleeve (3) is located between the piston (4) and the plunger (9).

3. Plunger piston shoe necking-in tool according to claim 2, wherein one end of the forming sleeve (3) close to the piston shoe (10) is provided with an inward inclined plane (31) and presses the piston shoe (10) through the inclined plane (31).

4. Plunger piston shoe binding-off tool according to claim 3, characterized in that the forming sleeve (3) comprises two symmetrical semi-forming sleeves.

5. The plunger piston shoe necking-in tool according to any one of claims 1 to 4, wherein a limiting pad (2) is sleeved on the piston shoe (10), and the limiting pad (2) abuts against the end of the piston (4).

6. The plunger piston shoe necking-in tool according to claim 5, wherein the limiting pad (2) comprises two symmetrical semi-limiting pads.

7. The plunger piston shoe necking tool according to any one of claims 1 to 4 and 6, wherein a pressing cover (6) is connected to the shell (1), a push rod (7) penetrates through the pressing cover (6), and the push rod (7) tightly presses the plunger (9) against the piston shoe (10).

8. The plunger piston shoe closing-in tool according to claim 7, characterized in that one end of the ejector rod (7) located outside the gland (6) is connected with a locking nut (8) in a threaded manner.

9. The plunger piston shoe necking-in tool according to any one of claims 1 to 4, 6 and 8, wherein a joint (5) is connected to a hydraulic oil inlet of the shell (1).

10. The plunger piston shoe necking-in tool according to claim 9, wherein the shell (1) is provided with a limiting groove for limiting the piston shoe (10).