CN203856681U - Crank of oilless air compressor - Google Patents
Crank of oilless air compressor Download PDFInfo
- Publication number
- CN203856681U CN203856681U CN201420126900.6U CN201420126900U CN203856681U CN 203856681 U CN203856681 U CN 203856681U CN 201420126900 U CN201420126900 U CN 201420126900U CN 203856681 U CN203856681 U CN 203856681U
- Authority
- CN
- China
- Prior art keywords
- hole
- crank
- inner disc
- outer disk
- air compressor
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a crank of an oilless air compressor. The crank comprises an inner disc and an outer disc, wherein the inner disc is integrally connected with the outer disc; a through hole which simultaneously penetrates through the inner disc and the outer disc is formed in the crank; a fastening hole communicated with the through hole is formed in the side part of the outer disc; a fastening screw is arranged in the fastening hole. The fastening screw is additionally arranged on the crank and the tight fit of the crank and a driving shaft is used, so that the connection of the crank is more stable.
Description
Technical field
The utility model belongs to field of mechanical technique, relates to the crank in a kind of oilless air compressor.
Background technique
Oilless air compressor is oil-free air compressor, and oil-free air compressor is the main body in compressed air source unit, and it is the device that the mechanical energy of prime mover (normally motor) is converted to gas pressure energy, is compressed-air actuated pressure generator.
Crank in air compressor, under the drive of motor, promotes the to-and-fro motion of piston.Existing crank is direct and corresponding transmission shaft drive fit realization is fixing, under the single vibration that is a tight fit in high frequency motion equipment, easily occurs the phenomenons such as loosening, and its stability has larger room for promotion.
Summary of the invention
The problem that the utility model exists for prior art proposes the crank in a kind of oilless air compressor, and object is to improve the stability that crank is connected with transmission shaft.
The utility model is achieved in that
Crank in a kind of oilless air compressor, comprise inner disc and outer disk, described inner disc is connected with described outer disk one, has the through hole that simultaneously runs through inner disc and outer disk on described crank, the sidepiece of described outer disk has the fastener hole being communicated with described through hole, in described fastener hole, is provided with fastening screw trip bolt.
In crank in above-mentioned a kind of oilless air compressor, the diameter of described outer disk is greater than the diameter of described inner disc, and described inner disc is eccentrically set in described outer disk, and described through hole is with respect to described inner disc eccentric setting.
In crank in above-mentioned a kind of oilless air compressor, described inner disc is contrary with respect to the deflection of inner disc with respect to deflection and the described through hole of described outer disk.
In crank in above-mentioned a kind of oilless air compressor, the inwall of described through hole is stepped, and the aperture of described through hole inner end is greater than the aperture of outer end.
In crank in above-mentioned a kind of oilless air compressor, on the step surface of described through hole large pore position and the transition of position, small aperture, there is annular groove.
In crank in above-mentioned a kind of oilless air compressor, on the hole wall of described through hole, there is bar shaped restraining groove.
Crank in a kind of oilless air compressor provided by the utility model, owing to having increased fastening screw trip bolt on crank, coordinates the drive fit of crank and transmission shaft, makes the connection of crank more stable.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model crank.
Fig. 2 is the structural representation after the assembling of the utility model crank.
Embodiment
Below just accompanying drawing in conjunction with the embodiments, is described in further detail embodiment of the present utility model, so that technical solutions of the utility model are easier to understand, grasp.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
The utility model provides the crank in a kind of oilless air compressor, as shown in Figure 1, comprises inner disc 110 and outer disk 120, has through hole 130 to run through inner disc 110 and outer disk 120 on crank 100 simultaneously, and through hole 130 is with respect to inner disc 110 eccentric settings.Further consult Fig. 2, the exterior edge face of inner disc 110 and bearing 300 tight fit connections, transmission shaft 200 is located in through hole 130, and driven by motor transmission shaft 200 rotates, and by the eccentric setting of through hole 130, drives moving up and down of piston rod 400.
Consult Fig. 2, the sidepiece of described outer disk 120 has the fastener hole 140 being communicated with described through hole 130, in described fastener hole 140, is provided with fastening screw trip bolt 150.Fastening screw trip bolt 150 is reached and is further stablized fixed crank 100 and transmission shaft 200 by extruding transmission shaft 200.
Consult Fig. 2, the diameter of outer disk 120 is greater than the diameter of described inner disc 110, and described inner disc 110 is eccentrically set in described outer disk 120, and described inner disc 110 is contrary with respect to the deflection of inner disc 110 with respect to deflection and the described through hole 130 of described outer disk 120.Like this when piston moves upward, can be by the inertia of outer disk 120, reduce the piston needed power that moves upward, ensure the normal operation of equipment, reduce energy loss.
The inwall of through hole 130 is stepped, and the aperture of described through hole 130 inner ends is greater than the aperture of outer end.On the step surface of through hole 130 large pore positions and the transition of position, small aperture, there is annular groove.On transmission shaft 200, also have and the hierarchic structure of this stepped inwall adaptation, in the time leaning at the bottom of the step surface of the step surface on transmission shaft 200 and through hole 130 inwalls, due to the effect of annular groove, step surface on through hole 130 inwalls can form micro-deformation, increases the tightness that transmission shaft 200 is connected with crank 100.
On the hole wall of through hole 130, also there is bar shaped restraining groove (not shown), corresponding raised line and restraining groove can be set on transmission shaft 200 and coordinate, realize spacingly, ensure non-slip.
Should be understood that; the foregoing is only preferred embodiment of the present utility model; be not sufficient to limit the technical solution of the utility model; for those of ordinary skills; within spirit of the present utility model and principle; can be increased and decreased according to the above description, replaced, converted or be improved, and all these increases and decreases, replace, conversion or improve after technological scheme, all should belong to the protection domain of the utility model claims.
Claims (6)
1. the crank in an oilless air compressor, it is characterized in that, comprise inner disc and outer disk, described inner disc is connected with described outer disk one, on described crank, there is the through hole that simultaneously runs through inner disc and outer disk, the sidepiece of described outer disk has the fastener hole being communicated with described through hole, in described fastener hole, is provided with fastening screw trip bolt.
2. crank according to claim 1, is characterized in that, the diameter of described outer disk is greater than the diameter of described inner disc, and described inner disc is eccentrically set in described outer disk, and described through hole is with respect to described inner disc eccentric setting.
3. crank according to claim 2, is characterized in that, described inner disc is contrary with respect to the deflection of inner disc with respect to deflection and the described through hole of described outer disk.
4. crank according to claim 1, is characterized in that, the inwall of described through hole is stepped, and the aperture of described through hole inner end is greater than the aperture of outer end.
5. crank according to claim 4, is characterized in that, on the step surface of described through hole large pore position and the transition of position, small aperture, has annular groove.
6. according to the crank described in claim 1-5 any one, it is characterized in that on the hole wall of described through hole, thering is bar shaped restraining groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420126900.6U CN203856681U (en) | 2014-03-19 | 2014-03-19 | Crank of oilless air compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420126900.6U CN203856681U (en) | 2014-03-19 | 2014-03-19 | Crank of oilless air compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203856681U true CN203856681U (en) | 2014-10-01 |
Family
ID=51606536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420126900.6U Expired - Fee Related CN203856681U (en) | 2014-03-19 | 2014-03-19 | Crank of oilless air compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203856681U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107939646A (en) * | 2017-07-11 | 2018-04-20 | 浙江巨霸焊接设备制造有限公司 | A kind of crankshaft installed structure of oilless air compressor |
-
2014
- 2014-03-19 CN CN201420126900.6U patent/CN203856681U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107939646A (en) * | 2017-07-11 | 2018-04-20 | 浙江巨霸焊接设备制造有限公司 | A kind of crankshaft installed structure of oilless air compressor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141001 Termination date: 20150319 |
|
| EXPY | Termination of patent right or utility model |