CN218454818U

CN218454818U - Buckling and pressing device for assembling plunger and sliding shoe

Info

Publication number: CN218454818U
Application number: CN202222091953.6U
Authority: CN
Inventors: 刘流
Original assignee: Changzhou Spd Automation Equipment Co ltd
Current assignee: Changzhou Spd Automation Equipment Co ltd
Priority date: 2022-08-09
Filing date: 2022-08-09
Publication date: 2023-02-07
Anticipated expiration: 2032-08-09

Abstract

The utility model relates to the technical field of plunger and slipper withholding tools, in particular to a withholding device for plunger and slipper assembly, which comprises a fixed sleeve fixedly connected with a press machine; the pressing rod is sleeved inside the fixed sleeve, the top of the pressing rod is connected with a pressing mechanism of the press machine, and the pressing rod slides up and down inside the fixed sleeve under the driving of the press machine; the pressure head is fixedly connected with the bottom end of the pressure rod; the movable sleeve is sleeved between the fixed sleeve and the pressure rod, a first spring is arranged between the pressure rod and the movable sleeve, and the upper end and the lower end of the first spring are respectively abutted against the pressure rod and the movable sleeve; and the hoop sleeve is fixedly connected with the bottom end of the movable sleeve and used for covering the outside of the fixed die with the plunger piston arranged inside. The utility model discloses a withhold the device assembly and withhold the precision height, reduced the compound die power of the fixed mould of plunger, can effectively solve current withhold the assembly and need provide the technical problem that the assembly precision is low between great compound die power, piston shoes and the plunger.

Description

Buckling and pressing device for assembling plunger and sliding shoe

Technical Field

The utility model relates to a plunger and piston shoe withhold frock technical field, especially relate to a plunger and piston shoe assembly are with withholding device.

Background

The plunger pump changes the sealed volume to realize oil absorption and oil discharge by means of the reciprocating motion of the plunger in the cylinder body hole. The axial plunger pump has the advantages of compact structure, small unit power volume, light weight, high working pressure, easy variable realization and the like, and is widely applied to occasions with high pressure, large flow and flow needing to be adjusted, such as hydraulic machines, engineering machinery and ships.

The plunger piston shoe assembly is a core part in the axial plunger pump, comprises a plunger and a piston shoe, and realizes oil absorption and oil discharge by changing the volume of the sealed working cavity by means of reciprocating motion of the plunger in the cylinder body. The plunger connecting part is provided with an inwards-concave spherical cavity, and the plunger connecting part is wrapped by the plunger connecting part after being assembled and molded with the plunger, and the ball head can rotate in the plunger connecting part. The plunger and the piston shoe are both provided with liquid through holes, the plunger liquid through holes axially penetrate through the whole plunger, and the plunger is communicated with the liquid through holes of the piston shoe and used for high-pressure liquid circulation.

In the conventional assembly between the plunger and the sliding shoe, two assembling modes of buckling assembly and spinning assembly are mainly adopted. The spinning assembly mode is complex in equipment and process, the spinning tool can meet assembly requirements only through multiple times of debugging and die repairing, assembly cost is high, a sliding shoe is made of hard materials, and large shaking and noise can be generated in the spinning process. The buckling assembly mode is that a plunger is fixed after a fixed die is used for closing the die, then a sliding shoe is arranged on a plunger ball head, and the sliding shoe is directly buckled and closed with the plunger by providing pressure downwards through a pressure head of a buckling device.

At present, in a common buckling assembly mode, in the process that a buckling device directly presses down a sliding shoe, a hydraulic system with a hydraulic cylinder is usually adopted to apply larger pressure inwards around a fixed mold so as to prevent the fixed mold from opening outwards, the mode not only needs to provide higher mold closing power, the cost is increased, the noise in the working process is larger, but also the fixed mold of a plunger is easy to wear when the mold is closed and opened, and the service life can be shortened. Meanwhile, the assembly mode has no buffer completely in the assembly process, the assembly gap between the sliding shoe and the plunger is unstable, the problem that the contact surface at the spherical matching part of the plunger and the sliding shoe is easy to wear or the rotation is inflexible is solved, and the performance and the service life of the plunger pump are directly influenced.

SUMMERY OF THE UTILITY MODEL

To exist not enough among the prior art, the utility model aims to provide a plunger and piston shoe assembly are with withholding device, simple structure, the assembly withholds the precision high, and is with low costs, has reduced the compound die power of the fixed mould of plunger, the utility model discloses can effectively solve and need provide technical problem such as the unstable degree of accuracy of assembly between great compound die power, piston shoe and the plunger among the current withholding assembly methods.

In order to realize the technical purpose, the utility model discloses a following technical scheme:

the utility model discloses an among the technical scheme a plunger and piston shoe assembly are with withholding device is provided, set up in the below of press, include:

the fixed sleeve is hollow, has openings at two ends and is fixedly connected with the press;

the pressing rod is sleeved inside the fixing sleeve, the top of the pressing rod is connected with a pressing mechanism of a press machine, and the pressing rod slides up and down inside the fixing sleeve under the driving of the press machine;

the pressure head is fixedly connected with the bottom end of the pressure rod and used for pressing the sliding shoe;

the movable sleeve is sleeved between the fixed sleeve and the pressure rod, a first spring is arranged between the pressure rod and the movable sleeve, and the upper end and the lower end of the first spring are respectively abutted against the pressure rod and the movable sleeve;

the hoop cover, inside cavity and both ends opening, with movable sleeve's bottom fixed connection, the hoop cover is located fixed sleeve's below for the lid closes the outside of the fixed mould that internally mounted has the plunger.

By adopting the technical scheme, the hoop sleeve is arranged, the hoop sleeve is pressed and sleeved outside the fixed die from the upper part, and the inner wall of the hoop sleeve is contacted with the outer wall of the fixed die, so that the die closing power provided by the external power system of the fixed die can be reduced, and the cost of the power system is saved. The pressing mechanism drives the pressing rod to drive the pressing head to press downwards through the pressing machine, so that buckling assembly between the sliding shoe and the plunger is completed, certain pressure buffering is provided through the first spring, the pressing rod pressing stability is improved, the assembly process between the sliding shoe and the plunger is more stable, abrasion between the assembly surfaces of the sliding shoe and the plunger is prevented, and the assembly precision is improved.

In some possible embodiments, a second spring is arranged between the movable sleeve and the fixed sleeve, the upper end and the lower end of the second spring are respectively abutted against the movable sleeve and the fixed sleeve, the movable sleeve can slide up and down in the fixed sleeve, and meanwhile, the movable sleeve and the pressure rod can slide relatively. Through setting up the second spring, can drive movable sleeve downstream when the depression bar pushes down, press down the stable outside of registing at fixed mould with the hoop.

In some possible embodiments, the first spring has a higher stiffness coefficient than the second spring. Through the technical scheme, when the press machine drives the pressure rod to press down, the pressure rod drives the movable sleeve to move downwards firstly because the compression elasticity of the first spring is greater than that of the second spring, so that the second spring is compressed, and the hoop sleeve is driven to press down and be sleeved outside the fixed die; and then the compression elasticity of second spring is greater than first spring, and the depression bar begins to compress first spring to the driving pressure head pushes down the piston shoe, and then withholds the parcel with the piston shoe outside the bulb of plunger, realizes withholding the process of assembly.

In some possible embodiments, the inner wall and the outer wall of the movable sleeve are provided with a first notch and a second notch, respectively, for mounting a first spring and a second spring, respectively.

In some possible embodiments, the upper ring of the pressing rod is provided with a pressing platform extending outwards, the bottom surface of the pressing platform is abutted against the first spring, and the pressing rod compresses the first spring downwards through the pressing platform when being pressed downwards.

In some possible embodiments, an upward extending clamping piece is arranged above the pressure head, a clamping groove with a downward opening is arranged at the bottom end of the pressure rod, and the clamping piece is inserted into the clamping groove to form interference fit with the clamping groove, so that the fixed connection between the pressure rod and the pressure head is realized, and the stability of the buckling and pressing assembly process of the plunger and the sliding shoe is ensured.

In some possible embodiments, the pressure rod and the pressure head are both cylindrical, and the outer diameter of the pressure head is not larger than that of the pressure rod, so that the pressure head is hidden inside the movable sleeve and can slide relatively inside the movable sleeve.

In some possible embodiments, the side wall of the pressure head is provided with two symmetrical grooves, so that the pressure head can be conveniently held by a hand to be taken and placed, and the anti-skid effect is improved.

In some possible embodiments, the side wall of the fixed sleeve is provided with a plurality of windows, so that the stroke position of the internal movable sleeve sliding up and down can be observed conveniently.

In some possible embodiments, the collar is cylindrical and has an inner diameter greater than an outer diameter of the strut.

The utility model provides a plunger and piston shoe assembly are with withholding device's beneficial effect as follows:

the utility model can reduce the mold closing power provided by the external power system of the fixed mold by arranging the hoop cover to cover the outside of the fixed mold, thereby saving the cost of the power system; through the first spring and the second spring, a mode of two-stage pressing stroke is adopted, certain buffering and damping effects are provided, the stability of the assembling process between the sliding shoe and the plunger is improved, the pressing force is uniformly applied to the sliding shoe and the plunger, the flexible connection between the sliding shoe and the plunger is ensured, the abrasion between assembling surfaces of the sliding shoe and the plunger is prevented, and the assembling precision and the assembling efficiency are improved; and the stiffness coefficient of the first spring is larger than that of the second spring, and in the pressing process of the pressure rod, the second spring driving hoop sleeve is firstly compressed to cover the outer part of the fixing mold, so that the opening of the plunger fixing mold in the pressing process is prevented, and then the first spring driving pressure head is compressed to press down, so that the sliding shoe and the plunger are assembled in a pressing manner.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic perspective view of a pressing device for assembling a plunger and a shoe according to the present invention;

FIG. 2 is an exploded view of the buckling apparatus for assembling the plunger and the shoe according to the present invention;

FIG. 3 is a side view of the pressing device for assembling the plunger and the shoe of the present invention;

FIG. 4 isbase:Sub>A cross-sectional view taken along line "A-A" in FIG. 3;

FIG. 5 is a sectional perspective view of the pressing device for assembling the plunger and the shoe of the present invention;

fig. 6 is a working state diagram of the middle fastening device of the present invention when assembling the plunger and the sliding shoe.

The reference numbers in the figures illustrate: 1. fixing the sleeve; 11. a window; 2. a pressure lever; 21. a boss; 22. a card slot; 3. a pressure head; 31. a fastener; 32. a groove; 4. a movable sleeve; 41. a first notch; 42. a second notch; 5. a hoop sleeve; 6. a first spring; 7. a second spring; 100. a slipper; 200. a plunger; 300. fixing the mold; 400. a crimping device; 500. a mold base; 600. a plunger fixing seat; 700. a drive mechanism.

Detailed Description

The following description is provided for illustrative embodiments of the present invention, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. While the invention will be described in conjunction with the preferred embodiments, it is not intended that features of the invention be limited to only those embodiments.

In the description of the present embodiment, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the utility model is used, and are only for convenience of describing the utility model and simplifying the description, but do not indicate or imply that the device or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be interpreted as limiting the utility model. The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present embodiment, it should be further noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present embodiment can be understood in specific cases by those of ordinary skill in the art.

In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Referring to fig. 1 and 2, in an embodiment of the present invention, a fastening device for assembling a plunger and a slipper is provided, which is connected below a press machine and comprises a fixed sleeve 1, a pressure rod 2, a pressure head 3, a movable sleeve 4 and a ferrule 5.

Specifically, referring to fig. 5 and 6 in combination, in the present embodiment, the fixing sleeve 1 is hollow inside and is open at both ends, and is fixedly connected with an external press. The pressure bar 2 is sleeved inside the fixed sleeve 1, the top of the pressure bar 2 is connected with a pressing mechanism of a press machine, and the pressure bar 2 slides up and down inside the fixed sleeve 1 under the drive of the press machine. The pressure head 3 is fixedly connected with the bottom end of the pressure rod 2 and is used for pressing the sliding shoe 100 downwards when the pressure rod slides downwards. The movable sleeve 4 is sleeved between the fixed sleeve 1 and the pressing rod 2, a first spring 6 is arranged between the pressing rod 2 and the movable sleeve 4, and the upper end and the lower end of the first spring 6 are respectively abutted against the pressing rod 2 and the movable sleeve 4. The first spring 6 is arranged for buffering, the pressing stability of the pressing rod 2 is improved, the assembling process between the sliding shoe 100 and the plunger 200 is more stable, the stress is balanced, abrasion between the assembling surfaces of the sliding shoe 100 and the plunger 200 is prevented, and the assembling precision is improved. The hoop 5 is cylindrical, the interior of the hoop is hollow, two ends of the hoop are open, the inner diameter of the hoop 5 is the same as the outer diameter of the fixed mold 300, the hoop 5 is fixedly connected with the bottom end of the movable sleeve 4, and the hoop 5 is located below the fixed sleeve 1 and used for covering the outside of the fixed mold 300 with the plunger 200 mounted inside.

Referring to fig. 4 and 5, the upper ring of the pressing rod 2 is provided with a pressing table 21 extending outward, the bottom surface of the pressing table 21 abuts against the first spring 6, and the pressing rod 2 compresses the first spring 6 downward by the pressing table 21 when pressed downward. A second spring 7 is further arranged between the movable sleeve 4 and the fixed sleeve 1, and the stiffness coefficient of the second spring 7 is smaller than that of the first spring 6. The upper end and the lower end of the second spring 7 are respectively abutted against the movable sleeve 4 and the fixed sleeve 1, the movable sleeve 4 can slide up and down in the fixed sleeve 1, and meanwhile, the movable sleeve 4 and the pressure rod 2 can slide relatively. The second spring 7 is arranged to provide buffering, and the movable sleeve 4 can be driven to move downwards when the pressure rod 2 is pressed downwards, so that the hoop 5 can be smoothly moved downwards to be sleeved outside the fixed die 300.

In another embodiment of the present invention, referring to fig. 2 and 4, the pressing head 3 is provided with an upward extending fastener 31 above, the bottom end of the pressing rod 2 is provided with a downward opening clamping groove 22, and the fastener 31 is inserted into the clamping groove 22 to form an interference fit therewith, so as to realize the fixed connection between the pressing rod 2 and the pressing head 3 and ensure the stability of the pressing assembly process of the plunger 200 and the sliding shoe 100. The lateral wall of the pressure head 3 is provided with two symmetrical grooves 32, so that the pressure head is convenient to hold by hand and take and the anti-skid effect is improved. Referring to fig. 5, the movable sleeve 4 is provided with first and

second notches

41 and 42 on inner and outer walls thereof, respectively, for mounting the first and

second springs

6 and 7, respectively.

Referring to fig. 2 and 4, the ferrule 5 has a cylindrical shape with an inner diameter larger than an outer diameter of the pressure lever 2. The pressure lever 2 and the pressure head 3 are both cylindrical, the outer diameter of the pressure head 3 is not larger than that of the pressure lever 2, and the pressure head 3 can be hidden inside the movable sleeve and can relatively slide inside the movable sleeve. Referring to fig. 2 and 3, the side wall of the fixed sleeve 1 is provided with a plurality of windows 11 for observing the stroke position of the inner movable sleeve 3 sliding up and down.

Referring to fig. 6, the fixing device for the buckling assembly of the plunger 200 includes a plunger fixing seat 600 for mounting the plunger 200, a mold seat 500 is mounted outside the plunger fixing seat 600 to be fixedly connected with a worktable, driving mechanisms 700 are respectively and fixedly connected to the left and right sides of the mold seat 500, and the driving mechanisms 700 can drive the mold closing or opening by using air cylinders.

Wherein, the left and right sides of plunger fixing base 600 slides respectively and is provided with fixed mould 300, and fixed mould 300 is half-and-half semicircle that has the cavity in it. The fixed molds 300 are connected with a driving mechanism 700, and under the driving of the driving mechanism 700, the two fixed molds 300 can slide relatively to each other to limit the plunger 200 and the fixed molds 300 by inward folding, or the two fixed molds 300 slide oppositely to release the plunger 200 by outward unfolding. The buckling and pressing device 400 is arranged above the plunger fixing seat 600, and a pressure rod 2 of the buckling and pressing device 400 is fixedly connected with a pressing mechanism of an external press machine.

The driving mechanism used with the conventional crimping device mostly adopts a hydraulic cylinder, and needs to provide a large power to provide enough clamping pressure for the two fixed dies 300, so as to prevent the fixed dies 300 from being forced to open in the process of crimping the sliding shoe 100 and the plunger 200. The utility model discloses a withhold device 400 hoops fixed die 300 in its inner chamber through setting up hoop cover 5, fixes spacingly in advance to can reduce the locking pressure that actuating mechanism 700 provided, thereby adopt the cylinder can the compound die, reduce power cost, improve the product precision.

Use the utility model discloses a withhold device 400 carries out plunger 200 and piston shoe 100 withhold when assembling:

(1) Fixing the plunger 200 on the plunger fixing seat 600, driving mechanisms 700 on the left side and the right side respectively drive the fixing mold 300 fixedly connected with the plunger to slide inwards and fold so as to fix the plunger fixing seat 600, and downwards sleeving a spherical cavity of the sliding shoe 100 on a ball head of the plunger 200 to perform primary buckling, assembling and positioning;

(2) Starting a press machine to drive the press rod 2 to start to press down, wherein the stiffness coefficient of the second spring 7 is smaller than that of the first spring 6, the press rod 2 drives the movable sleeve 4 to move downwards, and then the second spring 7 is compressed downwards, so that the hoop sleeve 5 abutted against the second spring 7 is driven to move downwards, the hoop sleeve 5 is sleeved outside the fixed die 300, the fixed die 300 is limited and fixed, and the situation that the hoop sleeve 5 can be opened in the buckling and pressing assembly process is avoided;

(3) The compression rod 2 continues to press downwards, the compression elasticity of the second spring 7 is larger than the compression resilience force of the first spring 6, the compression rod 2 compresses the first spring 6 downwards, the driving pressure head 3 slides downwards to abut against the sliding shoe 100, the sliding shoe 100 is buckled and wrapped outside the ball head of the plunger 200, and the buckling and assembling process is achieved;

(4) After the crimping assembly is completed, the first spring 6 is extended and reset, the pressure rod 2 moves upwards, the pressure head 3 leaves the surface of the piston shoe 100, then the second spring 7 is extended and reset, the hoop sleeve 5 is separated from the fixed die 300, and the plunger piston shoe assembly which is crimped together can be taken down from the fixed die 300.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a more detailed description of the invention, and the detailed description of the invention, taken in conjunction with the specific embodiments thereof, is not intended to limit the invention to the specific embodiments disclosed herein. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. A plunger and piston shoes assembly are with withholding device sets up in the below of press, its characterized in that includes:

the fixed sleeve (1) is hollow and has two open ends and is fixedly connected with the press machine;

the pressing rod (2) is sleeved inside the fixed sleeve (1), the top of the pressing rod (2) is connected with a pressing mechanism of a press machine, and the pressing rod (2) slides up and down inside the fixed sleeve (1) under the driving of the press machine;

the pressure head (3) is fixedly connected with the bottom end of the pressure rod (2) and is used for pressing the sliding shoe (100) downwards;

the movable sleeve (4) is sleeved between the fixed sleeve (1) and the pressure rod (2), a first spring (6) is arranged between the pressure rod (2) and the movable sleeve (4), and the upper end and the lower end of the first spring (6) are respectively abutted against the pressure rod (2) and the movable sleeve (4);

the hoop (5) is hollow, has two open ends, and is fixedly connected with the bottom end of the movable sleeve (4), and the hoop (5) is positioned below the fixed sleeve (1) and used for covering the outside of the fixed die (300) internally provided with the plunger (200).

2. The buckling and pressing device for assembling the plunger and the slipper as claimed in claim 1, wherein a second spring (7) is arranged between the movable sleeve (4) and the fixed sleeve (1), the upper end and the lower end of the second spring (7) are respectively abutted against the movable sleeve (4) and the fixed sleeve (1), the movable sleeve (4) can slide up and down in the fixed sleeve (1), and meanwhile, the movable sleeve (4) and the pressing rod (2) can slide relatively.

3. A plunger and slipper assembly crimping apparatus as claimed in claim 2 wherein said first spring (6) has a higher rate than said second spring (7).

4. A device according to claim 2, characterized in that said movable sleeve (4) has a first notch (41) and a second notch (42) in its inner and outer walls, respectively, for receiving said first spring (6) and said second spring (7), respectively.

5. A plunger and slipper assembling crimping apparatus as claimed in claim 1 wherein said plunger (2) is provided with an outwardly extending boss (21) on its upper ring, the underside of said boss (21) abutting said first spring (6).

6. The buckling and pressing device for assembling the plunger and the slipper as claimed in claim 1, wherein a clamping piece (31) extending upwards is arranged above the pressure head (3), a clamping groove (22) with a downward opening is arranged at the bottom end of the pressure rod (2), and the clamping piece (31) is inserted into the clamping groove (22) to form an interference fit with the clamping piece.

7. A crimping device for assembling a plunger and a slipper according to claim 5, characterized in that the pressure rod (2) and the pressure head (3) are cylindrical, and the outer diameter of the pressure head (3) is not larger than the outer diameter of the pressure rod (2).

8. A device according to claim 5, characterized in that the side wall of the pressure head (3) is provided with two symmetrical grooves (32).

9. The buckling and pressing device for assembling the plunger and the slipper as claimed in claim 1, wherein the side wall of the fixed sleeve (1) is provided with a plurality of windows (11) for observing the stroke position of the movable sleeve (4) sliding up and down.

10. A device according to claim 1, wherein the collar (5) is cylindrical and has an inner diameter larger than the outer diameter of the plunger (2).