CN111702460A - Tool assembly for assembling oil-free linear pump and assembling method - Google Patents
Tool assembly for assembling oil-free linear pump and assembling method Download PDFInfo
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- CN111702460A CN111702460A CN202010573484.4A CN202010573484A CN111702460A CN 111702460 A CN111702460 A CN 111702460A CN 202010573484 A CN202010573484 A CN 202010573484A CN 111702460 A CN111702460 A CN 111702460A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/02—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
- B23P19/027—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same using hydraulic or pneumatic means
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- Mechanical Engineering (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
The invention relates to a tool assembly for assembling an oil-free linear pump and an assembling method, wherein the tool assembly comprises a step shaft tool and a cylinder base tool, wherein the step shaft tool comprises a first shaft section, a second shaft section and a third shaft section, the diameters of which are sequentially reduced; the cylinder seat tool is the same as the cylinder seat to be installed in structure, and the fit clearance between the cylinder hole and the piston in the cylinder seat tool is smaller than the fit clearance between the cylinder hole and the piston in the cylinder seat to be installed. The outer circular surface of the first shaft section is used for being matched with a cylinder hole in a cylinder base tool; the outer circular surface of the second shaft section is used for matching with inner holes of the rear pressure plate, the outer motor and the cylinder pressure plate; the end face of the third shaft section is attached to the end face of the inner hole in the cylinder pressing plate, so that the step shaft tool and the outer pressing plate are axially limited.
Description
Technical Field
The disclosure belongs to the technical field of linear pumps and linear compressors, and particularly relates to a tool assembly for assembling an oil-free linear pump and an assembling method.
Background
An oilless linear direct-acting pump (hereinafter referred to as oilless linear pump) is used as one of the direct-acting pumps, is driven by electric power, and has simple and easily-obtained power. The installed piston and the cylinder hole are in non-contact fit, and the coaxiality of the piston and the cylinder hole is ensured, so that the oil-free linear pump can run without friction for a long time; otherwise, friction is caused between the piston and the cylinder due to lateral bias force, the piston is abraded, working medium leakage is further caused, and mechanical efficiency and reliability of the pump are reduced. Meanwhile, the fit clearance between the piston and the cylinder cannot be too large, the clearance value reaches the micron level, otherwise, internal leakage between the piston and the cylinder hole is easily caused, and the volumetric efficiency of the pump is affected.
The inventor has realized that in order to realize the non-contact matching of the piston and the cylinder hole, the machining dimension precision of each part on the dimension chain is required to be higher than the clearance precision of the piston and the cylinder hole, and the non-contact matching of the piston and the cylinder hole after assembly is difficult to realize due to the fluctuation of the machining dimension of each part and the accumulated error of the parts.
If the tool is adopted for auxiliary positioning, the precision requirement on the tool is very high, the more auxiliary tools are used, the more links are needed for transferring the size, and the final size positioning still cannot meet the requirement.
Disclosure of Invention
The invention aims to provide a tool assembly for assembling an oil-free linear pump and an assembling method, which can realize clearance sealing and clearance operation of a piston and a cylinder.
In order to achieve the above object, a first aspect of the present disclosure provides a tool assembly for assembling an oil-free linear pump, including a step shaft tool and a cylinder base tool, where the step shaft tool includes a first shaft section, a second shaft section, and a third shaft section, whose diameters are sequentially reduced; the cylinder seat tool is the same as the cylinder seat to be installed in structure, and the fit clearance between the cylinder hole and the piston in the cylinder seat tool is smaller than the fit clearance between the cylinder hole and the piston in the cylinder seat to be installed.
The outer circular surface of the first shaft section is used for being matched with a cylinder hole in a cylinder base tool; the outer circular surface of the second shaft section is used for matching with inner holes of the rear pressure plate, the outer motor and the cylinder pressure plate; the end face of the third shaft section is attached to the end face of the inner hole in the cylinder pressing plate, so that the step shaft tool and the outer pressing plate are axially limited. The inner hole in the cylinder pressing plate is a stepped hole, and the outer circular surface of the third shaft section is used for being matched with the inner circular side surface of the large hole end of the stepped hole in the cylinder pressing plate.
A second aspect of the present disclosure provides a method of assembling an oil-free linear pump, comprising the steps of:
matching the step shaft tool with the shaft hole of the cylinder seat tool, and sequentially assembling a coaxially fixed rear pressing plate, an outer motor and a cylinder pressing plate between the step shaft tool and the cylinder seat tool;
dismantling the step shaft tool and the cylinder seat tool, and installing an inner motor;
putting the moving part, and pre-installing a first plate spring assembly and a second plate spring assembly;
reinstalling a cylinder seat tool, matching the cylinder seat tool with the inner diameter of the rear pressure plate, assembling a cylinder seat to be installed on the other side, and completely fixing the first plate spring assembly and the rear pressure plate and the second plate spring assembly and the cylinder pressure plate;
matching the positioning diameter of the cylinder seat to be installed with the inner diameter of the cylinder pressing plate, and fixing the cylinder seat to be installed and the cylinder pressing plate by using a connecting piece;
installing a piston in a cylinder hole of a cylinder seat to be installed, and fixing the piston and the moving part;
and (5) removing the cylinder seat tool.
The beneficial effects of one or more of the above technical solutions are as follows:
the cylinder seat tool and the cylinder seat to be installed in the same structural form are adopted, and the cylinder seat is provided with the process holes for positioning two ends of the moving part, so that the two ends of the moving part are matched and positioned in small process gaps, the coaxiality of the moving part and a cylinder is improved, and the coaxiality of the cylinder seat to be installed and the moving part is guaranteed; the pre-positioning of all parts is completed by using the small-gap cylinder seat tool, and the gap requirement between the cylinder seat to be installed and the piston can be effectively ensured.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic structural diagram of a step shaft fixture in an embodiment of the disclosure;
FIG. 2 is a schematic structural view of a cylinder block fixture according to an embodiment of the disclosure;
FIG. 3 is a schematic structural diagram of a cylinder block tool and a step shaft tool used for positioning a cylinder press plate and other components in the embodiment of the present disclosure;
FIG. 4 is a schematic structural view of an installed internal motor in an embodiment of the present disclosure;
FIG. 5 is a schematic view of the structure for securing the first leaf spring assembly, the second leaf spring assembly, etc. in an embodiment of the present disclosure;
fig. 6 is a schematic structural view of the cylinder block tool removed in the embodiment of the present disclosure.
In the figure: 1. a cylinder block; 2. a cylinder press plate; 3. an outer motor; 4. a rear pressing plate; 5. a first leaf spring screw; 6. a first leaf spring assembly; 7. a moving part; 8. a piston fastening screw; 9. an elastic pad; 10. a piston; 11. a connecting member; 12. a second leaf spring assembly; 13. a second leaf spring screw; 15. assembling; 16. and (5) a cylinder seat tool.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Example 1
As shown in fig. 1 and 2, the present embodiment provides a tool assembly for assembling an oil-free linear pump, including a step shaft tool 15 and a cylinder base tool 16, where the step shaft tool 15 includes a first shaft section, a second shaft section, and a third shaft section, whose diameters are sequentially reduced; the cylinder block tool 16 has the same structure as a cylinder block to be installed, and the fit clearance between the cylinder hole in the cylinder block tool 16 and the piston 10 is smaller than the fit clearance between the cylinder hole in the cylinder block 1 to be installed and the piston 10.
The outer circular surface of the first shaft section is used for matching a cylinder hole in a cylinder base tool 16; the outer circular surface of the second shaft section is used for matching inner holes of the rear pressure plate 4, the outer motor 3 and the cylinder pressure plate 2; the end face of the third shaft section is attached to the end face of the inner hole in the cylinder pressing plate 2, so that the step shaft tool 15 and the outer pressing plate are limited in the axial direction.
It should be pointed out that in this scheme first shaft segment, second shaft segment and the third shaft segment of step axle frock are used for realizing axial and the radial positioning of corresponding spare part, and the external diameter and the length of first shaft segment, second shaft segment and third shaft segment receive the size restriction of its oilless linear pump that will install, can set up by oneself by the technical personnel in this field, and the here is no longer repeated.
The inner hole in the cylinder pressing plate 2 is a stepped hole, and the outer circular surface of the third shaft section is used for being matched with the inner circular side surface of the large hole end of the stepped hole in the cylinder pressing plate 2.
It will be appreciated that the small bore end of the stepped bore is herein adapted to engage the outer cylindrical side of the second shaft section and the large bore end is adapted to engage the cylinder pressure plate.
The first shaft section and the end cover of the cylinder seat tooling 16 are respectively provided with a fabrication hole to expose the connecting piece 11.
It can be understood that the fabrication hole is a through hole, and an auxiliary tool such as a screwdriver can be passed through the fabrication hole to tighten the first leaf spring screw and the second leaf spring screw, and the fabrication hole can also be a threaded hole for connecting and installing a cylinder head and other purposes.
Example 2
As shown in fig. 3 to 6, the present embodiment provides a method of assembling an oil-free linear pump, including the steps of:
step 1, matching a step shaft tool 15 with a shaft hole of a cylinder base tool 16, and sequentially assembling a coaxially fixed rear pressure plate 4, an outer motor 3 and a cylinder pressure plate 2 between the step shaft tool 15 and the cylinder base tool 16; before the step shaft tool 15 is matched with the cylinder seat tool 16, a cylinder pressing plate 2, an outer motor 3 and a rear pressing plate 4 are sequentially arranged on the step shaft, then the cylinder pressing plate 2, the outer motor 3 and the rear pressing plate 4 are axially limited by the cylinder seat tool 16, and the cylinder pressing plate 2, the outer motor and the rear pressing plate 4 are connected by screws.
It should be pointed out that magnet or attraction moving part that respond in outer motor and the interior motor for moving part both ends take place bending deformation, after left side installation cylinder base frock, can restrict the bending of moving part left end, wait to install the cylinder base at moving part right-hand member preassembling this moment, realize the spacing of right-hand member, avoid when screwing up leaf spring screw, moving part is in the deformation state.
and 7, removing the cylinder seat tool 16.
The beneficial effect of this embodiment lies in:
1. the cylinder with the same structure is adopted to perform matching positioning of small technological gaps on the end part of the moving part 7, the cylinder seat is provided with a technological hole for positioning two ends of the moving part, so that the coaxiality of the moving part 7 and the cylinder is improved, the coaxiality of the cylinder seat and the moving part 7 is guaranteed, the cylinder seat with the small gaps is used for completing pre-positioning of parts, and finally, the required cylinder seat is replaced, so that the piston 10 is installed in the cylinder in a clearance mode.
2. By directly positioning the two ends of the moving part 7, the two ends of the moving part are basically not bent and deformed, the length of a force flow transmission path is reduced, and the positioning precision is improved.
3. The existing parts are directly used for positioning, so that auxiliary tools are reduced, and the positioning precision is improved.
4. Piston 10 has with moving part 7's connection structure and can dismantle, and locking design, and mechanical structure is more reliable effective, and the assembly is more simple and convenient, to the machining precision who has reduced partial part, has realized piston 10 and jar hole contactless assembly among the oilless linear pump to operation for a long time provides reliable effectual structure basis for oilless linear pump.
Although the present disclosure has been described with reference to specific embodiments, it should be understood that the scope of the present disclosure is not limited thereto, and those skilled in the art will appreciate that various modifications and changes can be made without departing from the spirit and scope of the present disclosure.
Claims (10)
1. A tool assembly for assembling an oil-free linear pump is characterized by comprising a step shaft tool and a cylinder base tool, wherein the step shaft tool comprises a first shaft section, a second shaft section and a third shaft section, the diameters of which are sequentially reduced; the cylinder seat tool is the same as the cylinder seat to be installed in structure, and the fit clearance between the cylinder hole and the piston in the cylinder seat tool is smaller than the fit clearance between the cylinder hole and the piston in the cylinder seat to be installed.
2. The tool assembly for assembly of an oil-free linear pump according to claim 1, wherein the outer circular surface of the first shaft section is used for fitting a cylinder hole in a cylinder block tool; the outer circular surface of the second shaft section is used for matching with inner holes of the rear pressure plate, the outer motor and the cylinder pressure plate; the end face of the third shaft section is attached to the end face of the inner hole in the cylinder pressing plate, so that the step shaft tool and the outer pressing plate are axially limited.
3. An oil-free linear pump assembly tooling assembly as claimed in claim 2, wherein the inner bore in the cylinder pressure plate is a stepped bore and the outer circular surface of the third shaft section is adapted to engage the inner circular side of the large bore end of the stepped bore in the cylinder pressure plate.
4. The tool assembly for assembling an oil-free linear pump according to claim 1, wherein the first shaft section and the end cover of the cylinder seat tool are respectively provided with a processing hole so as to expose the connecting piece.
5. A method for assembling an oil-free linear pump using the tool set for assembling an oil-free linear pump according to any one of claims 1 to 4, comprising,
matching the step shaft tool with the shaft hole of the cylinder seat tool, and sequentially assembling a coaxially fixed rear pressing plate, an outer motor and a cylinder pressing plate between the step shaft tool and the cylinder seat tool;
dismantling the step shaft tool and the cylinder seat tool, and installing an inner motor;
putting the moving part, and pre-installing a first plate spring assembly and a second plate spring assembly;
reinstalling a cylinder seat tool, assembling a cylinder seat to be installed on the other side, matching the cylinder seat tool with the inner diameter of the rear pressing plate, and completely fixing the first plate spring assembly, the rear pressing plate and the second plate spring assembly with the cylinder pressing plate;
matching the positioning diameter of the cylinder seat to be installed with the inner diameter of the cylinder pressing plate, and fixing the cylinder seat to be installed and the cylinder pressing plate by using a connecting piece;
installing a piston in a cylinder hole of a cylinder seat to be installed, and fixing the piston and the moving part;
and (5) removing the cylinder seat tool.
6. An assembly method of an oil-free linear pump according to claim 5, characterized in that before the step shaft tool is matched with the cylinder base tool, a cylinder pressure plate, an outer motor and a rear pressure plate are sequentially installed on the step shaft, then the cylinder base tool is used for completing the axial position limitation of the cylinder pressure plate, the outer motor and the rear pressure plate, and the cylinder pressure plate and the rear pressure plate are connected by screws.
7. An oil-free linear pump assembly as claimed in claim 5, wherein the positioning of the inner motor is achieved by engagement of the outer diameter of the inner motor with the inner circumferential surface and the end surface of the bore in the cylinder platen.
8. An assembly method for an oil-free linear pump according to claim 5, wherein the first leaf spring assembly and the second leaf spring assembly are pre-assembled simultaneously with pre-assembly of the elastic washer and the piston fastening screw.
9. An assembly method for an oil-free linear pump as claimed in claim 5, wherein the fixing of the first leaf spring screw is performed through a fabrication hole on the cylinder block tooling by positioning the cylinder hole in the cylinder block tooling with the end of the moving part to fasten the first leaf spring assembly.
10. An assembly method for an oil-free linear pump according to claim 5, wherein the subsequent components are assembled after the cylinder block tooling is removed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010573484.4A CN111702460A (en) | 2020-06-22 | 2020-06-22 | Tool assembly for assembling oil-free linear pump and assembling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010573484.4A CN111702460A (en) | 2020-06-22 | 2020-06-22 | Tool assembly for assembling oil-free linear pump and assembling method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111702460A true CN111702460A (en) | 2020-09-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010573484.4A Withdrawn CN111702460A (en) | 2020-06-22 | 2020-06-22 | Tool assembly for assembling oil-free linear pump and assembling method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111702460A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115076070A (en) * | 2022-06-20 | 2022-09-20 | 青岛万宝压缩机有限公司 | Compression unit, oil-free linear compressor and installation method |
-
2020
- 2020-06-22 CN CN202010573484.4A patent/CN111702460A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115076070A (en) * | 2022-06-20 | 2022-09-20 | 青岛万宝压缩机有限公司 | Compression unit, oil-free linear compressor and installation method |
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Application publication date: 20200925 |