CN201696289U - Internal engaged gear pump - Google Patents
Internal engaged gear pump Download PDFInfo
- Publication number
- CN201696289U CN201696289U CN2010202194066U CN201020219406U CN201696289U CN 201696289 U CN201696289 U CN 201696289U CN 2010202194066 U CN2010202194066 U CN 2010202194066U CN 201020219406 U CN201020219406 U CN 201020219406U CN 201696289 U CN201696289 U CN 201696289U
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- CN
- China
- Prior art keywords
- driving wheel
- driven wheel
- cover plate
- gear
- utility
- 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 relates to an internal engaged gear pump which comprises a shaft (1), a cover plate (2), a casing (3), a driving wheel (4) and a driven wheel (5), wherein the driving wheel (4) is an external gear, the driven wheel (5) is an internal gear, the driving wheel (4) is fixed by the shaft (1), the cover plate (2) is matched with the shaft and sleeved on the left side of the shaft (1), the casing (3) is annularly fixed on the right side of the cover plate (2), the driven wheel (5) is arranged inside the inner ring of the casing (3), and the driven wheel (5) is engaged with the driving wheel (4) internally. The utility model reduces the friction, enhances the wear resistance, improves the seal performance and eliminates the problem of external oil leakage.
Description
Technical field
The utility model belongs to engineering truck oil pump field, particularly relates to a kind of crescent gear pump.
Background technique
The tooth curve design of existing gear pair is unreasonable, occurs tooth top easily and interfere in transmission process, and occurring back lash expansion easily after the operation for a long time, thereby cause the generation of oil leakage phenomenon.
The degree of finish of gear pair is not high, occurs wearing and tearing easily, influences operating life.
Now need to design a kind of new structure and solve this problem.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of crescent gear pump, to increase wear resistance, improves its sealing, stops the leakage of oil that leaks.
The technological scheme that its technical problem that solves the utility model adopts is: a kind of crescent gear pump is provided, comprise axle, cover plate, housing, driving wheel and driven wheel, described driving wheel is an external gear, described driven wheel is an internal gear, and described axle is driving wheel fixedly, and the cover plate fitted shaft is placed in the axle left side, housing is the circular cover plate right side that is fixed in, and engagement in driven wheel and driven wheel and the driving wheel is arranged in the housing inner ring.
Described axle is by the fixing driving wheel of flat key.
Beneficial effect
Advantage of the present utility model is as follows:
1. the tooth curve of internal gear pair is revised design, not only makes its transmission more steady, and improved volumetric efficiency, the profile of tooth of original gear for fear of when engagement the external gear tooth top interfere.
2. tooth trace digitizing.
3. rationally adjust and radially reach the end clearance between back lash, gear pair and the housing of gear pair, both reduced internal leakage, raise the efficiency, movement parts is rotated flexibly, reliable operation does not have clamping stagnation.
4. improve the degree of finish of each fitting surface, reduce friction, increase wear resistance.
5. improve the flatness of pump housing oral area end face and cover plate, improve its sealing, stop the leakage of oil that leaks.
Description of drawings
Fig. 1 is the utility model sectional view.
Fig. 2 is the utility model plan view.
Fig. 3 is the utility model schematic diagram one.
Fig. 4 is the utility model schematic diagram two.
Fig. 5 is the utility model schematic diagram three.
Fig. 6 is the utility model schematic diagram four.
Embodiment
Below in conjunction with specific embodiment, further set forth the utility model.Should be understood that these embodiments only to be used to the utility model is described and be not used in the restriction scope of the present utility model.Should be understood that in addition those skilled in the art can make various changes or modifications the utility model after the content of having read the utility model instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
As shown in Figure 1 and Figure 2, the utility model comprises axle 1, cover plate 2, housing 3, driving wheel 4 and driven wheel 5, described driving wheel 4 is an external gear, described driven wheel 5 is an internal gear, and described axle 1 is driving wheel 4 fixedly, and cover plate 2 fitted shaft 1 are placed in axle 1 left side, housing 3 is circular cover plate 2 right sides that are fixed in, and driven wheel 5 and driven wheel 5 and driving wheel 4 interior engagements are arranged in the housing 3.
Described axle 1 is by the fixing driving wheel 4 of flat key.
As shown in Figure 3, with its tooth top chamfering, contact points when the external gear number meshes is lower, add 0.56 millimeter apart from tooth top, remove chamfering after the correction, contact points is brought up to apart from tooth top has only 0.56 millimeter, and its contact points has improved 0.97 millimeter, seal space when the raising of contact points has increased the gear pair engagement, thus volumetric efficiency improved.
As shown in Figure 4, the contact length of the flank of tooth had strengthened surface of contact when the raising of external gear contact points had increased engagement in addition, made transmission more steady.Its surface of contact value added is 0.597B (B is the gear width) as can be known from the graph.
As shown in Figure 5, the tooth trace digitizing, and under the prerequisite that does not influence function of use, carry out briefly, be convenient to mould manufacturing and product manufacturing and detection.
As shown in Figure 6, the facewidth of external gear is suitably increased, not only reduced the back lash of gear pair, and degree of agreement is good mutually in gear pair engagement back, thereby improved the tightness of slot, further improved the oil sealing effect, reveal in reducing, raise the efficiency.
The temperature range of oil pump work is-30 degrees centigrade～120 degrees centigrade, because the wall thickness of internal gear is thinner, the back expansion of being heated can make diameter increase.
Radial clearance between gear and housing is increased to 0.08 millimeter by 0.05 millimeter, not only for the internal gear back that is heated expand to become and to have reserved the space greatly, and help lubricant oil and advance the people, improve greasy property, it is rotated flexibly, reliable operation does not have clamping stagnation.
In the height dimension of gear pair, the height of driven wheel internal gear helps reducing interior leakage a little less than driving wheel (0.01～0.03 millimeter), improves and lubricates, and raises the efficiency.
Gear face adopts correct grinding back grinding and polishing, and surface finishment is brought up to chi Ra0.5 by Ra0.8.
Pump housing oral area end face adopts fine finishing, and its flatness error is less than 0.03 millimeter, and the cover plate plane is through precise finish, and its flatness error is less than 0.025 millimeter, and both stickiness of assembling back are good, add the effect of rubber seal, effectively prevented the leakage of oil that leaks.
Claims (2)
1. crescent gear pump, comprise axle (1), cover plate (2), housing (3), driving wheel (4) and driven wheel (5), it is characterized in that: described driving wheel (4) is an external gear, described driven wheel (5) is an internal gear, and described axle (1) is driving wheel (4) fixedly, and cover plate (2) fitted shaft (1) is placed in axle (1) left side, housing (3) is circular cover plate (2) right side that is fixed in, and the interior engagement of driven wheel (5) and driven wheel (5) and driving wheel (4) is arranged in the housing (3).
2. a kind of crescent gear pump according to claim 1 is characterized in that: described axle (1) is by the fixing driving wheel (4) of flat key.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202194066U CN201696289U (en) | 2010-06-08 | 2010-06-08 | Internal engaged gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202194066U CN201696289U (en) | 2010-06-08 | 2010-06-08 | Internal engaged gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201696289U true CN201696289U (en) | 2011-01-05 |
Family
ID=43397531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202194066U Expired - Fee Related CN201696289U (en) | 2010-06-08 | 2010-06-08 | Internal engaged gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201696289U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101846070A (en) * | 2010-06-08 | 2010-09-29 | 宁波市镇海邵氏超越离合器制造有限公司 | Internal gear pump |
-
2010
- 2010-06-08 CN CN2010202194066U patent/CN201696289U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101846070A (en) * | 2010-06-08 | 2010-09-29 | 宁波市镇海邵氏超越离合器制造有限公司 | Internal gear pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110105 Termination date: 20130608 |