CN217481517U - Hollow plunger structure - Google Patents
Hollow plunger structure Download PDFInfo
- Publication number
- CN217481517U CN217481517U CN202220800500.3U CN202220800500U CN217481517U CN 217481517 U CN217481517 U CN 217481517U CN 202220800500 U CN202220800500 U CN 202220800500U CN 217481517 U CN217481517 U CN 217481517U
- Authority
- CN
- China
- Prior art keywords
- plunger
- inner core
- clamping
- plunger body
- hollow
- Prior art date
- Legal status (The legal status 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 status listed.)
- Active
Links
Images
Landscapes
- Reciprocating Pumps (AREA)
Abstract
The utility model relates to the technical field of air conditioners and discloses a hollow plunger structure which is applied to a swash plate type plunger pump and comprises a plunger body, an inner core, a limiting mechanism and a plunger body, wherein the plunger body is of a hollow structure; the inner core is inserted in the plunger body; the limiting mechanism is abutted to the tail of the inner core and used for limiting the position of the inner core. The hollow plunger structure of this application includes the plunger body, inner core and stop gear, carries on spacingly through stop gear to the inner core, guarantees that the inner core does not have axial float under the stress. The inner core, the clamping ring and the plunger piston body can be processed separately, the processing difficulty is low, and the assembly difficulty is small. The hollow plunger function can be realized through the assembled assembly without welding. The top of the inner core is in interference fit with the joint of the plunger body, and the tail of the inner core is in interference fit with the joint of the plunger body. To ensure a complete seal and thus prevent leakage of hydraulic oil.
Description
Technical Field
The utility model relates to a plunger pump technical field especially relates to a hollow plunger structure.
Background
The plunger pump is an important device of the hydraulic system. The plunger reciprocates in the cylinder body to change the volume of the sealed working cavity so as to absorb and press oil. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency, convenient flow regulation and the like. The plunger is a core part of a plunger type hydraulic pump or a motor, the working efficiency of the hydraulic pump is influenced by the overlarge weight of the plunger, and the plunger with light weight and high strength is the key for improving the efficiency of the hydraulic pump.
At present, most of the existing plungers adopt solid plunger structures, and a small number of the existing plungers use hollow plungers and are formed by welding two plunger bodies in a split manner, so that the manufacturing and processing difficulty is high, and the plunger is monopolized by a small number of enterprises. And when the plunger works, the inner core possibly has an axial movement condition due to external force, and the working efficiency of the plunger pump is influenced.
Therefore, how to reduce the weight of the plunger on the premise of high strength is a technical problem to be solved urgently by those skilled in the art
SUMMERY OF THE UTILITY MODEL
In some embodiments of the present application, a hollow plunger structure is provided to solve the technical problems of high quality, high difficulty of welding process, and axial play of an inner core in the prior art.
In some embodiments of this application, improved the high problem of plunger weight, adopted hollow plunger structure, just the plunger body the inner core with snap ring detachable processing, the processing degree of difficulty is little, and the assembly degree of difficulty is low. Because of the requirement of plunger intensity, the inner core can adopt the higher steel of intensity with the plunger body.
In some embodiments of the application, a limiting mechanism of the plunger is improved, the limiting mechanism abuts against the tail of the inner core, and the limiting mechanism is used for limiting the position of the inner core. The limiting mechanism comprises a clamping ring and a clamping groove, and the clamping ring is abutted against the tail part of the inner core; and the clamping ring is connected with the clamping groove in a sliding manner. The snap ring includes first dop, cardboard and second dop: a first chuck; the top end of the clamping plate is fixedly connected with the first clamping head; the second chuck is fixedly connected to the bottom end of the clamping plate. The clamping grooves comprise a first clamping groove and a second clamping groove, the first clamping groove is formed in the inner wall above the tail part of the plunger body, and the first clamping head is connected to the first clamping groove in a sliding mode; the second clamping groove is formed in the inner wall below the tail of the plunger body, and the second clamping head is connected to the inside of the second clamping groove in a sliding mode; the first clamping groove and the second clamping groove correspond to each other in position. The inner core is ensured not to axially move under the stress state.
In some embodiments, the present application provides a hollow plunger structure, which is applied to a swash plate type plunger pump, and includes:
the plunger piston body is of a hollow structure;
the inner core is inserted into the plunger body;
and the limiting mechanism is abutted against the tail part of the inner core and is used for limiting the position of the inner core.
In some embodiments of the present application, the limiting mechanism comprises:
the clamping ring is abutted against the tail part of the inner core;
and the clamping ring is connected with the clamping groove in a sliding manner.
In some embodiments of the present application, the snap ring comprises:
a first chuck;
the top end of the clamping plate is fixedly connected with the first clamping head;
and the second clamping head is fixedly connected to the bottom end of the clamping plate.
In some embodiments of the present application, the card slot includes:
the first clamping groove is formed in the inner wall above the tail part of the plunger body, and the first clamping head is connected to the first clamping groove in a sliding mode;
the second clamping groove is formed in the inner wall below the tail of the plunger body, and the second clamping head is connected to the inside of the second clamping groove in a sliding mode;
the first clamping groove and the second clamping groove are mutually corresponding in position.
In some embodiments of the present application, a connection portion of the top portion of the inner core and the plunger body is in interference fit, and a connection portion of the tail portion of the inner core and the plunger body is in interference fit.
In some embodiments of the present application, the hollow plunger structure further comprises:
and the throttling mechanism is arranged in the top of the plunger body and is communicated with the inner core.
Compared with the prior art, the application has the following beneficial effects:
this hollow plunger structure of application includes the plunger body, inner core and stop gear, and is spacing to the inner core, guarantees that the inner core does not have axial float under the stress. The inner core, the clamping ring and the plunger piston body can be processed separately, the processing difficulty is low, and the assembly difficulty is small. The hollow plunger function can be realized through the assembled assembly without welding. The top of the inner core is in interference fit with the joint of the plunger body, and the tail of the inner core is in interference fit with the joint of the plunger body. To ensure a complete seal and thus prevent leakage of hydraulic oil.
Drawings
Fig. 1 is a schematic structural diagram of a hollow plunger structure according to an embodiment of the present invention;
fig. 2 is an enlarged schematic view of a structure at a in the embodiment of the present invention;
fig. 3 is an enlarged schematic view of a structure at B in the embodiment of the present invention.
In the figure, the position of the upper end of the main shaft,
1. a plunger body; 2. an inner core; 3. a snap ring; 41. a first card slot; 42. a second card slot; 51. a first chuck; 52. clamping a plate; 53. a second chuck; 61. a tail interference fit part; 62. the top is in interference fit; 7. and a throttling mechanism.
Detailed Description
The following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The application provides a hollow plunger structure, this structure is applied to in the swash plate formula plunger pump, and this structure includes:
the plunger piston comprises a plunger piston body 1, wherein the plunger piston body 1 is of a hollow structure;
the inner core 2 is inserted into the plunger body 1;
and the limiting mechanism is abutted to the tail part of the inner core 2 and is used for limiting the position of the inner core 2.
In some embodiments of the present application, the limiting mechanism comprises:
the clamping ring 3 is abutted against the tail part of the inner core 2;
the clamping groove is connected with the clamping ring 3 in a sliding mode.
In some embodiments of the present application, the snap ring 3 includes:
a first chuck 51;
a clamping plate 52, the top end of which is fixedly connected to the first chuck 51;
and the second clamping head 53 is fixedly connected to the bottom end of the clamping plate 52.
In some embodiments of the present application, the card slot includes:
the first clamping groove 41 is formed in the inner wall above the tail of the plunger body 1, and the first clamping head 51 is connected to the first clamping groove 41 in a sliding mode;
the second clamping groove 42 is formed in the inner wall below the tail of the plunger body 1, and the second clamping head 53 is connected to the inner part of the second clamping groove 42 in a sliding mode;
the positions of the first card slot 41 and the second card slot 42 correspond to each other.
In some embodiments of the present application, a joint between the top of the inner core 2 and the plunger body 1 is an interference fit joint 62, and a joint between the tail of the inner core 2 and the plunger body 1 is an interference fit joint 61.
In some embodiments of the present application, the hollow plunger structure further comprises:
and the throttling mechanism 7 is arranged in the top of the plunger body 1, and the throttling mechanism 7 is communicated with the inner core 2.
The application is applied to the working principle of the swash plate type plunger pump: the total reciprocating stroke L of the plunger pump is constant and is determined by the lift of the cam. The amount of oil supplied to the plunger per cycle depends on the oil supply stroke, which is variable independently of camshaft control. The fuel supply start timing does not vary with the variation in the fuel supply stroke. The plunger is rotated to change the finish timing of the oil supply, thereby changing the amount of the oil supply. When the plunger pump works, the plunger is forced to do up-and-down reciprocating motion under the action of the cam on the camshaft of the fuel injection pump and the plunger spring, so that the oil pumping task is finished.
The plunger is arranged in a hole of the cylinder body for pressing oil, the tail end of the exposed plunger is spherical, the ball head is provided with a piston shoe, the piston shoes completely press the piston shoes on the plungers on the swash plate through a return plate under the pressure of a return spring, finally, the transmission shaft drives the cylinder body to rotate, all the plungers and the piston shoes rotate along with the rotation, and the tail end of the plunger always leans against the swash plate through the piston shoes so as to circularly and continuously press oil for absorbing oil. The plunger carries out the atress at whole in-process, and spacing mechanism restricts inner core 2, avoids 2 axial drunkenness of inner core. And the plunger body 1, the inner core 2 and the snap ring 3 do not move relatively. The throttle mechanism 7 is used for saving hydraulic oil, on one hand, lubricating the joint of the sliding shoe and the plunger, and on the other hand, providing static pressure balance pressure for the sliding shoe.
According to the first design of this application, improved the high problem of plunger weight, adopted hollow plunger structure, just the plunger body 1 the inner core 2 with 3 separable processing of snap ring, the processing degree of difficulty is little, and the assembly degree of difficulty is low. Because of the requirement of plunger intensity, the inner core 2 and the plunger body 1 can adopt steel with higher intensity.
According to the second concept of the application, a limiting mechanism of the plunger is improved, the limiting mechanism abuts against the tail of the inner core 2, and the limiting mechanism is used for limiting the position of the inner core 2. The limiting mechanism comprises a clamping ring 3 and a clamping groove, and the clamping ring 3 abuts against the tail of the inner core 2; the clamping groove is connected with the clamping ring 3 in a sliding mode. The snap ring 3 includes a first chuck 51, a chuck plate 52 and a second chuck 53: a first chuck 51; the top end of the clamping plate 52 is fixedly connected with the first clamping head 51; the second chuck 53 is fixedly connected to the bottom end of the chuck plate 52. The clamping grooves comprise a first clamping groove 41 and a second clamping groove 42, the first clamping groove 41 is formed in the inner wall above the tail of the plunger body 1, and the first clamping head 51 is connected in the first clamping groove 41 in a sliding mode; the second clamping groove 42 is formed in the inner wall below the tail of the plunger body 1, and the second clamping head 53 is connected to the inside of the second clamping groove 42 in a sliding mode; the positions of the first card slot 41 and the second card slot 42 correspond to each other. The inner core 2 is ensured to have no axial movement under the stress state.
This hollow plunger structure of application includes plunger body 1, inner core 2 and stop gear, carries on spacingly to inner core 2 through stop gear, guarantees that inner core 2 does not have axial float under the stress. The inner core 2, the snap ring 3 and the plunger body 1 can be processed separately, the processing difficulty is low, and the assembly difficulty is small. The hollow plunger function can be realized through the assembled assembly without welding. The top of the inner core 2 is in interference fit with the joint of the plunger body 1, and the tail of the inner core 2 is in interference fit with the joint of the plunger body 1. To ensure a complete seal and thus prevent leakage of hydraulic oil.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (6)
1. A hollow plunger structure, comprising:
the plunger piston body is of a hollow structure;
the inner core is inserted into the plunger body;
and the limiting mechanism is abutted to the tail of the inner core and is used for limiting the position of the inner core.
2. A hollow plunger structure as claimed in claim 1, wherein said limiting mechanism comprises:
the clamping ring is abutted against the tail part of the inner core;
and the clamping ring is connected with the clamping groove in a sliding manner.
3. A hollow plunger structure as claimed in claim 2, wherein said snap ring comprises:
a first chuck;
the top end of the clamping plate is fixedly connected with the first clamping head;
and the second clamping head is fixedly connected to the bottom end of the clamping plate.
4. A hollow plunger structure as claimed in claim 3, wherein said catch comprises:
the first clamping groove is formed in the inner wall above the tail part of the plunger body, and the first clamping head is connected to the first clamping groove in a sliding mode;
the second clamping groove is formed in the inner wall below the tail of the plunger body, and the second clamping head is connected to the inside of the second clamping groove in a sliding mode;
the first clamping groove and the second clamping groove are mutually corresponding in position.
5. The hollow plunger structure of claim 1, wherein the connection between the top of the inner core and the plunger body is in interference fit, and the connection between the tail of the inner core and the plunger body is in interference fit.
6. A hollow plunger structure as claimed in claim 1, further comprising:
and the throttling mechanism is arranged in the top of the plunger body and communicated with the inner core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220800500.3U CN217481517U (en) | 2022-04-07 | 2022-04-07 | Hollow plunger structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220800500.3U CN217481517U (en) | 2022-04-07 | 2022-04-07 | Hollow plunger structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217481517U true CN217481517U (en) | 2022-09-23 |
Family
ID=83307822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220800500.3U Active CN217481517U (en) | 2022-04-07 | 2022-04-07 | Hollow plunger structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217481517U (en) |
-
2022
- 2022-04-07 CN CN202220800500.3U patent/CN217481517U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112796968A (en) | Embedded return stroke structure of sloping cam plate and have plunger pump of this structure | |
| CN102140723B (en) | Water jet device of water jet loom | |
| CN110397565A (en) | A kind of Variable plunger pump | |
| CN217481517U (en) | Hollow plunger structure | |
| CN110566426A (en) | Double-acting groove cam constant-flow reciprocating pump | |
| CN209637882U (en) | A kind of variable compression ratio of engines system | |
| CN101270739A (en) | Axial plunger type hydraulic motor or pump | |
| CN212479545U (en) | Emulsion plunger pump and pump head assembly thereof | |
| CN111075706B (en) | Control valve for reciprocating pump and reciprocating pump comprising same | |
| CN109519352B (en) | Plunger pump and engineering machinery | |
| CN112081739A (en) | Emulsion plunger pump and pump head assembly thereof | |
| CN208221073U (en) | The plunger assembly of axial plunger pump | |
| JP5806071B2 (en) | Variable displacement plunger pump device | |
| CN116677493B (en) | Circumferential rotor engine | |
| CN218407698U (en) | Six-cylinder plunger pump | |
| EP2184491A1 (en) | Pump head for fuel pump assembly | |
| CN201401305Y (en) | Variable-displacement rotary swash-plate compressor | |
| CN1043979A (en) | Hydrodynamic oil-diving pump | |
| CN220551207U (en) | Double plunger pump | |
| CN214464726U (en) | Base body assembly for short-body electro-hydraulic tool | |
| CN221120198U (en) | Transmission mechanism and plunger pump | |
| CN216975156U (en) | Hydraulic pump group and vehicle | |
| CN217270562U (en) | High-pressure common rail pump | |
| CN214304156U (en) | Plunger motor with built-in limited displacement mechanism | |
| CN2813925Y (en) | Multi-plunger diaphragm pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No.197a, Fushou East Street, Weifang hi tech Industrial Development Zone, Shandong 261000 Patentee after: WEICHAI POWER Co.,Ltd. Patentee after: Weichai Hydraulic Transmission Co.,Ltd. Address before: No.197a, Fushou East Street, Weifang hi tech Industrial Development Zone, Shandong 261000 Patentee before: WEICHAI POWER Co.,Ltd. Patentee before: LINDE HYDRAULICS (CHINA) Co.,Ltd. |