CN213298191U - Hydraulic pump swash plate support and pump body connection structure - Google Patents
Hydraulic pump swash plate support and pump body connection structure Download PDFInfo
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- CN213298191U CN213298191U CN202021882794.6U CN202021882794U CN213298191U CN 213298191 U CN213298191 U CN 213298191U CN 202021882794 U CN202021882794 U CN 202021882794U CN 213298191 U CN213298191 U CN 213298191U
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- swash plate
- pump body
- bushing
- counter bore
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Abstract
The utility model discloses a connecting structure of a swash plate bracket and a pump body of a hydraulic pump, which comprises a pump body and a swash plate bracket; the device also comprises a support; the support is provided with a support runway, and the swash plate support is arranged in the support runway; the support is provided with a support counter bore, the pump body is provided with a pump body counter bore, the support is arranged in the pump body, the support counter bore is aligned with the pump body counter bore, and the support counter bore is arranged in the two counter bores by a pin and is connected and fixed. The outer wall of the pin is provided with a sealing groove, and an O-shaped ring is arranged in the sealing groove. The swash plate support is provided with a bushing hole, and the bushing is arranged in the bushing hole in an interference manner. The lower end of the shifting block is in a ball shape and is inserted into the bushing, namely the lower end of the shifting block and the bushing form a hinged structure, and the upper end of the shifting block is connected with the control piston. The utility model discloses can effectively solve the flange runway and easily collide with, the difficult assembly of sloping cam plate support and flange, the problem that influences hydraulic pump stability and reliability such as the flange runway is yielding.
Description
Technical Field
The utility model belongs to the technical field of the hydraulic pump technique and specifically relates to a hydraulic pump sloping cam plate support and pump body connection structure.
Background
The hydraulic pump swash plate support and the pump body are matched to move, which is an important working mechanism program of the pump, and the swash plate support is moved to keep the hydraulic displacement stable by controlling the pistons to push the swash plate to swing. The reasonable design of the connection mode directly influences the flow stability and reliability of the pump; the existing variable mechanism has the problems that a flange track is easy to collide, a swash plate support and a flange are not easy to assemble, the flange track is easy to deform and the like.
Publication (bulletin) No.: CN108213893A publication (announcement) day: 2018-06-29 relates to a rotary assembling bracket for assembling a swash plate type axial plunger pump, which comprises a body, a vertical indexing pin, a vertical indexing device, a vertical indexing plate, a horizontal indexing pin, a horizontal indexing device and a product mounting seat; the whole cross sections of the body and the vertical dividing disc are U-shaped; the vertical indexing pins are symmetrically arranged on the body in pairs; the two vertical indexing pins are positioned on the same horizontal shaft; the vertical dividing device penetrates through the side wall of the body and is connected with the vertical dividing disc; the vertical indexing disc is arranged on the body through a vertical indexing pin and can freely rotate around the axial direction of the vertical indexing pin; the vertical dividing disc is provided with a product mounting seat, a horizontal dividing device and a horizontal dividing pin; the product mounting seat is sleeved outside the horizontal indexing pin and can freely rotate around the axial direction of the horizontal indexing pin; the horizontal indexing device penetrates through the product mounting seat and is connected with the vertical indexing disc. The invention has the advantages of simple operation, reduced labor intensity and improved working efficiency.
Publication (bulletin) No.: CN105715474B, publication (public notice) day: 2017-09-29 a plunger hydraulic pump comprising: the device comprises a front end cover, a transmission shaft, a shell, a mechanical seal, a supporting seat, a small shaft, a plunger body, a cylinder body, a swash plate, a rear end cover, a bolt, a compression spring and a sealing ring. The hydraulic pump does not need bearing support, the transmission shaft is supported by a front end cover and is sealed at the end face through mechanical seal, the part of the transmission shaft arranged in the shell is connected with the supporting seat through threads, the transmission shaft is connected with the cylinder body through a small shaft, and a pressure spring is arranged on the small shaft. The cylinder body is provided with an even number of cylinder body holes, the cylindrical part at one end of the even number of plunger bodies is inserted into the supporting seat, and the hemispherical part at the other end is positioned in the cylinder body hole and is matched with the spherical hole part of the cylinder body hole. The right side of the cylinder body is tightly attached to the swash plate, the swash plate has certain inclination, when the transmission shaft rotates at a high speed, the transmission shaft drives the small shaft and the plunger to rotate together, the cylinder body rotates together with the transmission shaft, the volume of the cavity of the cylinder body changes along with the rotation, and oil is sucked and discharged through the rear end cover and the holes in the swash plate.
Publication (bulletin) No.: CN109416031A, publication (public notice) day: 2019-03-01 swash plate type plunger pump (1, 90) comprising: a cylinder (3) that rotates in accordance with the rotation of the drive shaft (5); a plurality of plungers (8) which are accommodated in a plurality of cylinders (6) provided in the cylinder block (3); a swash plate (4) that reciprocates a plunger (8) in accordance with the rotation of the cylinder block (3) to expand and contract a volume chamber (7) of a cylinder (6); urging mechanisms (21, 22) for urging the swash plate (4) in a direction in which the deflection angle increases; a control pin (30) for driving the swash plate (4) in a direction in which the deflection angle decreases in accordance with an increase in the load pressure of the pressure chamber (42); and discharge flow paths (53, 54) for discharging the load pressure of the pressure chamber (42).
Publication (bulletin) No.: CN101331322A, publication (public notice) day: 2008-12-24 a swash plate pump for fluids uses a counterweight arrangement in the rotating drive shaft to minimize vibration caused by the couple of the nutating swash plate. The resilient inner seal includes radial vanes extending from the conical plate to contact the adjacent side of the swash plate and a peripheral annular seal between the swash plate and the inner spherical part of the outer casing to improve efficiency by preventing backflow. The elastomeric seal reduces the accuracy requirements and therefore many plastic parts can be used. Carbon fiber leaf valves help to increase efficiency.
In a word, above technical scheme of the disclosure and the technical problem that will solve and the beneficial effect who produces all with the utility model discloses inequality, perhaps technical field or application are different, are directed against the utility model discloses more technical problem and the beneficial effect that will solve, above all there is not technological inspiration in the technical document of disclosing.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a hydraulic pump sloping cam plate support and pump body connection structure to the above-mentioned defect that prior art exists, can effectively solve the flange runway and easily collide with, sloping cam plate support and the difficult assembly of flange, the problem that influences hydraulic pump stability and reliability such as the flange runway is yielding.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a connecting structure of a swash plate bracket and a pump body of a hydraulic pump comprises the pump body and the swash plate bracket; the device also comprises a support;
the support is provided with a support runway, and the swash plate support is arranged in the support runway;
the support is provided with a support counter bore, the pump body is provided with a pump body counter bore, the support is arranged in the pump body, the support counter bore is aligned with the pump body counter bore, and the support counter bore is arranged in the two counter bores by a pin and is connected and fixed.
Furthermore, a sealing groove is formed in the outer wall of the pin, and an O-shaped ring is installed in the sealing groove.
The swash plate support is provided with a bush hole, and the bush is arranged in the bush hole in an interference manner.
The lower end of the shifting block is in a ball shape and is inserted into the bushing, namely the lower end of the shifting block and the bushing form a hinged structure, and the upper end of the shifting block is connected with the control piston.
Compared with the prior art, the utility model following beneficial effect has:
the utility model discloses a support is as the bridge of connecting sloping cam plate support and the pump body. The support is put into the pump body guide groove and then rotated, the counter bores of the support are coincided with the counter bores of the pump body, and the pins are put into the two counter bores, so that the support is fixed in the pump body; the swash plate support is arranged in the support runway and moves up and down, so that the swash plate support can normally move in the support runway. When the control valve reaches an opening condition, pressure oil is introduced, the oil pressure P acts on the large end of the control piston, and the piston is pushed to move through the area difference action; the control piston moves and drives the swash plate support to move on the track of the support through the movable connection of the lining and the shifting block, the linear movement is changed into the rotary movement, the swing angle of the swash plate is changed, the discharge capacity of the hydraulic pump is further changed, and the problems that the flange track is easy to collide, the swash plate support and the flange are not easy to assemble, the flange track is easy to deform and the like to influence the stability and the reliability of the hydraulic pump can be effectively solved.
Drawings
Fig. 1 is a schematic view of the connection structure of the swash plate support and the pump body of the hydraulic pump of the present invention.
In the figure: the pump body 1, a support 2, a swash plate support 3, a bushing 4, a pin 5, an O-shaped ring 6, a shifting block 7 and a control piston 8.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution:
a connecting structure of a swash plate bracket and a pump body of a hydraulic pump comprises a pump body 1 and a swash plate bracket 3; also comprises a support 2;
the support is provided with a support runway, and the swash plate support is arranged in the support runway;
the support is provided with a support counter bore, the pump body is provided with a pump body counter bore, the support is arranged in the pump body, the support counter bore is aligned with the pump body counter bore, and the support counter bore is arranged in the two counter bores by a pin 5 to be connected and fixed.
Furthermore, a sealing groove is formed in the outer wall of the pin, and an O-shaped ring 6 is installed in the sealing groove.
Further, the swash plate support further comprises a bushing 4, a bushing hole is formed in the swash plate support, and the bushing is arranged in the bushing hole in an interference mode.
Furthermore, the device also comprises a shifting block 7, wherein the lower end of the shifting block is in a ball head shape and is inserted into the bushing, namely, the lower end of the shifting block and the bushing form a hinged structure, and the upper end of the shifting block is connected with a control piston 8.
The support 2 is made of HT300C material, the surface is subjected to soft nitriding treatment, the compound layer depth is 0.008-0.015, the surface hardness is 850HV, and the support 2 is matched with the swash plate bracket 3 to move. The bushing 4 adopts high-carbon bearing steel to quench the excircle and adopts tolerance, and the inner hole adopts base hole system and tolerance. The control piston 8 adopts low-carbon steel carbonitriding treatment to keep certain impact toughness and reduce deformation, and the outer circle adopts grinding treatment to improve the motion fluency. The shifting head 7 is subjected to low-carbon steel carbonitriding treatment, the size of the outer circle of the cylindrical part adopts tolerance adding, and the spherical head part adopts base hole manufacturing tolerance reducing. The swash plate support 3 is nitrided by cast iron, and a cylindrical hole at the matching position of the swash plate support and the shifting block adopts a tolerance reducing and large interference design to ensure that the interference magnitude is greater than 0.035 mm. The shifting block 7 and the swash plate support 3 are assembled by adopting a temperature difference method.
The high-pressure oil pushes the control piston 8 to move and is hinged with the shifting block 7 through the bushing 4, so as to drive the swash plate bracket to rotate on the runway of the support. The pump body 1, the support 2 and the pin 5 are assembled together through clearance fit; the bush 4 and the swash plate support 3 are connected and assembled together through interference fit; the shifting block 7 and the bush 4 form movable hinge joint by clearance fit.
When the control valve reaches an opening condition, pressure oil is introduced, the oil pressure P acts on the large end of the control piston 8, and the piston is pushed to move through the area difference action; the control piston 8 moves to drive the swash plate bracket 3 to move on the support 2 through the movable connection of the bushing 4 and the shifting block 7, the linear motion is changed into the rotary motion, and the swing angle of the swash plate is changed so as to change the displacement of the hydraulic pump.
All parts and parts which are not discussed in the present application and the connection mode of all parts and parts in the present application belong to the known technology in the technical field, and are not described again. Such as welding, threaded connections, etc.
In the present application, the term "plurality" means two or more unless expressly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.
In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A connecting structure of a swash plate bracket and a pump body of a hydraulic pump comprises the pump body and the swash plate bracket; it is characterized by also comprising a support;
the support is provided with a support runway, and the swash plate support is arranged in the support runway;
the support is provided with a support counter bore, the pump body is provided with a pump body counter bore, the support is arranged in the pump body, the support counter bore is aligned with the pump body counter bore, and the support counter bore is arranged in the two counter bores by a pin and is connected and fixed.
2. The structure for connecting a swash plate bracket and a pump body of a hydraulic pump according to claim 1, wherein the outer wall of the pin is provided with a sealing groove, and an O-shaped ring is installed in the sealing groove.
3. The structure for connecting a swash plate bracket and a pump body of a hydraulic pump according to claim 1 or 2, further comprising a bushing, wherein the swash plate bracket is provided with a bushing hole, and the bushing is arranged in the bushing hole in an interference manner.
4. The connection structure of a swash plate bracket and a pump body of a hydraulic pump according to claim 3, further comprising a dial, wherein the lower end of the dial is in a ball shape and is inserted into the bushing, namely the lower end of the dial and the bushing form a hinge structure, and the upper end of the dial is connected with the control piston.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021882794.6U CN213298191U (en) | 2020-09-01 | 2020-09-01 | Hydraulic pump swash plate support and pump body connection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021882794.6U CN213298191U (en) | 2020-09-01 | 2020-09-01 | Hydraulic pump swash plate support and pump body connection structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213298191U true CN213298191U (en) | 2021-05-28 |
Family
ID=76028659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021882794.6U Active CN213298191U (en) | 2020-09-01 | 2020-09-01 | Hydraulic pump swash plate support and pump body connection structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213298191U (en) |
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2020
- 2020-09-01 CN CN202021882794.6U patent/CN213298191U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 276000 112 Changlin West Street, Linshu County, Linyi City, Shandong Province Patentee after: Shandong Zhongrun Hydraulic Machinery Co.,Ltd. Patentee after: SHANDONG CHANGLIN MACHINERY GROUP Co.,Ltd. Address before: 276715 No. 112, Changlin West Street, Linshu County, Linyi City, Shandong Province Patentee before: SHANDONG CCHC HYDRAULICS CO.,LTD. Patentee before: SHANDONG CHANGLIN MACHINERY GROUP Co.,Ltd. |
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| CP03 | Change of name, title or address |