CN204805087U - Fuel feed pump and be equipped with diesel engine of said fuel feed pump - Google Patents
Fuel feed pump and be equipped with diesel engine of said fuel feed pump Download PDFInfo
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- CN204805087U CN204805087U CN201520241811.0U CN201520241811U CN204805087U CN 204805087 U CN204805087 U CN 204805087U CN 201520241811 U CN201520241811 U CN 201520241811U CN 204805087 U CN204805087 U CN 204805087U
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- feed pump
- oil feed
- mounting hole
- housing
- bearing support
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Abstract
The utility model relates to a fuel feed pump and outfit the diesel engine of fuel feed pump. Plunger type fuel feed pump wherein, it includes: the casing be formed with the mounting hole in the casing, and camshaft, the camshaft is in via the slide bearing supporting in the mounting hole, slide bearing includes bearing frame and axle bush, the bearing frame is in it is fixed in the mounting hole, the axle bush is located the camshaft with between the bearing frame, wherein the bearing frame with be provided with the sealing layer between the casing in the interface of the direction of perpendicular to mounting hole axis, prevent that the inside lubricating oil of casing from leaking. The utility model discloses still relate to and being equipped with the diesel engine of fuel feed pump.
Description
Technical field
The sealability that relates to the utility model improves and the oil feed pump of simplified manufacturing process and be equipped with the diesel engine of described oil feed pump.
Background technique
Usually oil feed pump is equipped with, for supplying high pressure fuel to common rail in diesel engine.Oil feed pump is generally plunger type oil feed pump, it camshaft that can rotate comprising housing and install wherein, be formed with plunger cavity in the housing, the tappet body that the cam on camshaft is installed in drive plunger chamber when axle is driven in rotation moves back and forth, thus the fuel oil of supplied with pressurized.
In traditional oil feed pump, the axle journal of camshaft can be bearing in the mounting hole of pump case via sliding bearing rotatably.The bearing shell that sliding bearing is included in bearing support fixing in the mounting hole of pump case and is interposed between axle journal and bearing support.Bearing support has the flange that radially outward stretches out in outer end, this flange of bearing support is such as bolted on the step surface of pump case.Bearing shell provides the sliding bearing of camshaft.Being formed with cavity volume in pump case inside, for holding lubricant oil, guaranteeing the lubrication of associated mechanical part such as cam, tappet body etc.
In order to prevent lubricant oil to external leakage, between bearing support and the inwall of mounting hole, be provided with O V-shaped ring.When assembling, this O V-shaped ring realizes being enclosed within the groove of the outer wall of bearing support, to be then inserted in mounting hole and to be bolted in place.After assembling, O V-shaped ring be can't see.Therefore, sometimes in the process of assembling, likely forget and put O V-shaped ring in advance and directly bearing support be fixed on the mounting hole of pump case.Even if occur that this mistake also cannot be learnt rapidly, oil leak can be caused.And the situation of this oil leak often just can be found when complete test-run a machine assembled by whole oil feed pump, causing must by the loss of complete machine again dismounting.
In addition, O V-shaped ring is put in advance even without forgetting, because O V-shaped ring usually will less times greater than the internal diameter of mounting hole, therefore when bearing support is tucked in mounting hole by the assembling workman lacked experience, the inwall of mounting hole is probably by O V-shaped ring cutaway, due to the situation after assembling cannot be observed, the O V-shaped ring that this part is cut off makes the sealing effect of oil feed pump be deteriorated, often can only could find this seal defect when the follow-up use of oil feed pump, cause heavy losses.
Model utility content
For above problem, the utility model proposes a kind of sliding bearing of the improvement for installing between the oil feed pump housing and camshaft of diesel engine, it has abandoned traditional O V-shaped ring, does not thus exist owing to forgetting prior installation O V-shaped ring when assembling and causes seal failure or seal not enough possibility because O V-shaped ring is partially cut away when assembling; In addition, owing to having abandoned O V-shaped ring, thus the sliding bearing of this improvement can size less, thus the corresponding size of oil feed pump housing that causes also can correspondingly reduce, and reduces manufacture cost.
According to an aspect of the present utility model, provide a kind of plunger type oil feed pump of diesel engine, it comprises:
Housing, is formed with mounting hole in described housing; And
Camshaft, described camshaft via sliding supported condition in described mounting hole, described sliding bearing comprises bearing support and bearing shell, described bearing support is fixing in described mounting hole, described bearing shell is between described camshaft and described bearing support, wherein, between described bearing support and described housing, be provided with sealing layer along in the interface perpendicular to the direction of mounting hole axis, prevent the lubricant oil of enclosure interior from leaking.
Preferably, described bearing support comprises the axle sleeve part inserted in described mounting hole and the flange extended relative to described axle sleeve part radial direction, planar annular is formed in the side towards housing of described flange, around the mounting hole of described housing, be formed with planar annular, described interface is docked by the planar annular of described flange and the planar annular of described housing and is formed.
Preferably, described sealing layer is fixed on the planar annular of described flange in advance; Or described sealing layer is fixed on the planar annular of described housing in advance.
Alternatively, described sealing layer is fluorine rubber material, is applied on described planar annular or is sprayed directly on described planar annular by silk-screen printing.
Alternatively, described sealing layer is independent seal ring, bonds on described planar annular.
Preferably, described seal ring is made up of fluorine rubber.
Alternatively, described bearing support is secured on described housing via the bolt being parallel to the setting of its axial direction.
Alternatively, described bearing support is secured on described housing via the bolt arranged perpendicular to its axial direction.
Preferably, in described sealing layer, leave the through hole passed for described bolt.
According to another aspect of the present utility model, additionally provide a kind of diesel engine, it has common rail, and described common rail is supplied with high pressure fuel via aforesaid plunger type oil feed pump.
Adopt above-mentioned technological means of the present utility model, abandon O-ring seals of the prior art, causing the oil feed pump assembled seal disappearance or lack experience due to assembling and cut away a part of seal ring and cause the oil feed pump assembled to seal the phenomenon generation of deficiency without the need to worrying owing to forgetting prior installation seal ring when assembling, improve rate of good product; In addition, because parts to be assembled are provided with sealing layer in advance, simplify assembling and prepared link, improve packaging efficiency; In addition, owing to having abandoned O-ring seals, can sliding bearing and pump case be designed compacter.
Accompanying drawing explanation
In order to provide further explanation of the present utility model, accompanying drawing shows preferred embodiment of the present utility model as a part for specification, and each accompanying drawing is used to explain principle of the present utility model together with specification.In the drawings and in which:
Fig. 1 diagrammatically illustrates the perspective cut-away view of the housing of oil feed pump;
Fig. 2 diagrammatically illustrates the local assembling schematic diagram installed in the housing of oil feed pump according to sliding bearing of the present utility model; And
Fig. 3 diagrammatically illustrates the stereogram of the bearing support of sliding bearing employed in figure 2.
Embodiment
In the drawings and in which, identical parts are represented by identical reference character.
In specification of the present utility model, the plunger type oil feed pump for diesel engine is that example is described.It will be apparent to those skilled in the art that correlation technique content of the present utility model can be applied in any mechanical structure adopting sliding bearing.
Fig. 1 shows the oil feed pump for diesel engine, and it comprises housing 1.Be formed with inner volume 5 within the case 1, for holding lubricant oil.Plunger cavity 6a and 6b is formed with communicating within the case 1 with inner volume 5.The tappet body of (not shown) can be reciprocatingly installed in plunger cavity 6a and 6b.
Mounting hole 2 is formed with, for installing camshaft 10 in the both sides of housing 1.Camshaft 10 is formed with cam respectively, for driving tappet body to move back and forth in its plunger cavity when camshaft 10 is driven in rotation with very cylinders contact.
Below only further illustrate according to sliding bearing 20 of the present utility model for a mounting hole 2.Fig. 2 shows and adopts sliding bearing 20 camshaft 10 to be installed partial perspective view within the case 1.
Sliding bearing 20 comprises bearing support 21 and bearing shell 22.Camshaft 10 has axle journal 11.The axle journal 11 of camshaft 10 is bearing in the mounting hole 2 of housing 1 via sliding bearing 20.Particularly, bearing support 21 directly contacts with the inwall 2a of mounting hole 2, and bearing shell 22 is interposed between axle journal 11 and bearing support 21 and provides sliding bearing simultaneously.Unlike the prior art, O V-shaped ring is not set between bearing support 21 and the mounting hole 2 of housing 1.
Further referring to Fig. 3, show separately the bearing support 21 according to sliding bearing 20 of the present utility model.This bearing support 21 has axle sleeve part 26, and the outer surface of this axle sleeve part 26 directly contacts with the inwall 2a of the mounting hole 2 of housing 1 when assembling.As shown in Figure 2, formed porose in axle sleeve part 26 and bearing shell 22 respectively, the lubricating grease for lubrication sliding bearing can be provided in advance in described hole.
Flange 25 is formed radially outwardly in one end (when assembling away from that end of housing 1) of axle sleeve part 26.That side contacted with housing 1 of this flange 25 is formed the plane 23 of annular.
As shown in Figure 1, be adjacent to be formed with planar annular 3 with mounting hole 2 within the case 1.Surrounding within the case 1 in mounting hole 2 is formed with multiple isolated tapped hole 4, and is also formed with multiple through hole 24 at interval on the flange 25 of bearing support 21.When the bearing support 21 of sliding bearing 20 is in mounting hole 2 after installation in position, ring surface 23 is seated against on ring surface 3 and tapped hole 4 is relative with through hole 24, then bolt 30 is inserted in hole tighten in position.
Can not leak in order to ensure the lubricant oil in the oil feed pump after assembling, the ring surface 23 of bearing support 21 is provided with one deck sealing layer 40 equably, thus sealing layer provide sealing between ring surface 23 and 3 after assembling.The thickness of sealing layer 40 is determined according to seal request, such as can between 1 millimeter and 5 millimeters, or larger.Sealing layer 40 can reserve the through hole relative with through hole 24.
Such as, sealing layer can be the sealing layer be made up of the elaxtic seal of such as fluorine rubber, is fixed in advance on ring surface 23.Tighting a bolt after 30, sealing layer provides the sealing between ring surface 23 and 3 with the state of suitable pressurized, prevents the lubricant oil in housing 1 from leaking.
It is envisioned that above-mentioned sealing layer also can adopt other means to realize, such as, screen printing technique is adopted to be applied on ring surface 23, to be sprayed directly on ring surface 23 or as independent viton seal ring and to be bonded on ring surface 23.
For for sliding bearing of the present utility model, can in advance sealing layer be configured on bearing support when manufacturing bearing support, thus this bearing support as one independently element adopt in follow-up composing room, without the need to preparing in composing room as that O V-shaped ring of the prior art again, decreasing assembling circulation and preparing link.Because the bearing support being equipped with this sealing layer is provided directly to assembler, therefore cause sealing layer by neglected loading or locally cut away without the need to worrying due to the error of assembler when assembling, it also avoid the later stage troublesome dismounting again that the oil feed pump that assembles causes owing to lacking necessary sealing to reprocess, improve product fine rate.
In addition, provide a kind of sealing surface larger " face seals " between ring surface 23 and 3 according to this sealing layer of the present utility model, compared with " linear sealing " that provide with the O V-shaped ring of prior art, sealing effect is obviously better.
In addition, when the sliding bearing assembling of prior art, bolt is inserted into last point of through hole 24 and exposes and O V-shaped ring is enclosed within axle sleeve part 26 and is tucked in mounting hole 2, thus the exposed portion of bolt screws togather with the tapped hole in housing 1 and fixes sliding bearing.Therefore, in order to avoid hurting O V-shaped ring, enough evaded distances must be reserved by between through hole 24 and axle sleeve part 26, thus causing the radial dimension of flange 25 to do little.
Owing to having abandoned the O V-shaped ring of prior art on sliding bearing of the present utility model, therefore evaded distance is reserved without the need to considering again, that is, through hole 24 can be formed closer to axle sleeve part 26 ground diametrically, thus the radial dimension of the flange 25 of bearing support 21 can be reduced further.Correspondingly, the appropriate section of the housing of oil feed pump (such as, the annex mounting portion 7 of the housing 1 shown in Fig. 1) can be reduced size further, oil feed pump is manufactured compacter.
In above-mentioned embodiment, sealing layer is arranged on the flange 25 of bearing support 21 in advance.But it will be apparent to those skilled in the art that as an alternative, this sealing layer also can be mentioned same mode be arranged on the ring surface 3 of housing 1 with above-mentioned in advance.Like this, be equipped with the oil feed pump housing 1 of this sealing layer can be supplied as independent parts, decrease assembling circulation and prepare link, improve packaging efficiency.
In the illustrated embodiment in which, through hole 24 and tapped hole 4 all with the axis being parallel of camshaft 10 to be assembled be formed in bearing support 21 flange 25 and housing 1 in.If adopt the technological means of this " face sealing " of the present utility model, even can be in position by bearing support by the radial bolt tightened.In this case, such as radial direction through hole is arranged within the case 1 around mounting hole, and tapped hole is arranged radially in the flange of bearing support, and such bolt is tightened in the tapped hole of flange through the through hole of housing and fixes bearing support.This design can cause the radial dimension of the annex mounting portion 7 of the radial dimension of flange 25 and housing 1 to reduce further, thus makes oil feed pump volume compacter.
Although show and describe the utility model by specific embodiment, the utility model is not limited to these concrete conditions explained.On the contrary, in the scope of claims and equivalent thereof, various remodeling of the present utility model is feasible.
Claims (10)
1. a plunger type oil feed pump for diesel engine, it comprises:
Housing, is formed with mounting hole in described housing; And
Camshaft, described camshaft via sliding supported condition in described mounting hole, described sliding bearing comprises bearing support and bearing shell, described bearing support is fixing in described mounting hole, described bearing shell is between described camshaft and described bearing support, it is characterized in that, between described bearing support and described housing, be provided with sealing layer along in the interface perpendicular to the direction of mounting hole axis, prevent the lubricant oil of enclosure interior from leaking.
2. plunger type oil feed pump according to claim 1, it is characterized in that, described bearing support comprises the axle sleeve part inserted in described mounting hole and the flange extended relative to described axle sleeve part radial direction, planar annular is formed in the side towards housing of described flange, around the mounting hole of described housing, be formed with planar annular, described interface is docked by the planar annular of described flange and the planar annular of described housing and is formed.
3. plunger type oil feed pump according to claim 1 and 2, is characterized in that, described sealing layer is fixed on the planar annular of described flange in advance; Or described sealing layer is fixed on the planar annular of described housing in advance.
4. plunger type oil feed pump according to claim 3, is characterized in that, described sealing layer is fluorine rubber material, is applied on described planar annular or is sprayed directly on described planar annular by silk-screen printing.
5. plunger type oil feed pump according to claim 3, is characterized in that, described sealing layer is independent seal ring, bonds on described planar annular.
6. plunger type oil feed pump according to claim 5, is characterized in that, described seal ring is made up of fluorine rubber.
7. plunger type oil feed pump according to claim 3, is characterized in that, described bearing support is secured on described housing via the bolt being parallel to the setting of its axial direction.
8. plunger type oil feed pump according to claim 3, is characterized in that, described bearing support is secured on described housing via the bolt arranged perpendicular to its axial direction.
9. plunger type oil feed pump according to claim 7, is characterized in that, leaves the through hole passed for described bolt in described sealing layer.
10. a diesel engine, it has common rail, and described common rail is supplied with high pressure fuel via according to the arbitrary described plunger type oil feed pump of aforementioned claim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520241811.0U CN204805087U (en) | 2015-04-20 | 2015-04-20 | Fuel feed pump and be equipped with diesel engine of said fuel feed pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520241811.0U CN204805087U (en) | 2015-04-20 | 2015-04-20 | Fuel feed pump and be equipped with diesel engine of said fuel feed pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204805087U true CN204805087U (en) | 2015-11-25 |
Family
ID=54589922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520241811.0U Active CN204805087U (en) | 2015-04-20 | 2015-04-20 | Fuel feed pump and be equipped with diesel engine of said fuel feed pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204805087U (en) |
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2015
- 2015-04-20 CN CN201520241811.0U patent/CN204805087U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 214028 No.17 Xinhua Road, national high tech Industrial Development Zone, Wuxi City, Jiangsu Province Patentee after: Bosch powertrain Co.,Ltd. Address before: 214028 No.17 Xinhua Road, national high tech Industrial Development Zone, Wuxi City, Jiangsu Province Patentee before: Bosch Automotive Diesel Systems Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |