CN206206041U - Injection pump - Google Patents
Injection pump Download PDFInfo
- Publication number
- CN206206041U CN206206041U CN201621101458.7U CN201621101458U CN206206041U CN 206206041 U CN206206041 U CN 206206041U CN 201621101458 U CN201621101458 U CN 201621101458U CN 206206041 U CN206206041 U CN 206206041U
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- CN
- China
- Prior art keywords
- bearing
- adjusting nut
- injection pump
- camshaft
- clutch shaft
- 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.)
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- 238000002347 injection Methods 0.000 title claims abstract description 46
- 239000007924 injection Substances 0.000 title claims abstract description 46
- 230000002093 peripheral effect Effects 0.000 claims abstract description 21
- 238000007789 sealing Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000009434 installation Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Landscapes
- Fuel-Injection Apparatus (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
The utility model is related to a kind of injection pump, has：Pump case (6)；Camshaft (5)；Clutch shaft bearing (3a) and second bearing (3b), first and second bearings are provided for being supported on the camshaft (5) in the pump case (6), and in the first and second bearings axial limiting portion respectively with corresponding first axial end (31a, 31b) backstop on the camshaft (5)；Wherein, the injection pump also has：First radial bearing and the second radial bearing, the first and second radial bearings hold the first and second bearings in radially outer bag respectively；For the adjusting nut (7) of preloaded bearing, the outer peripheral face of the adjusting nut (7) is provided with external screw thread (71), the external screw thread (71) correspondingly constructs with the internal thread on the first radial bearing, the adjusting nut (7) bearing of pretension first and second on second axial end (31b) opposite with the first axial end (31a) of the clutch shaft bearing (3a).
Description
Technical field
The utility model relates in general to a kind of injection pump.
Background technology
Under various applicable cases, the working gap to bearing is required, therefore, pretension generally is carried out so as to carry to bearing
The rigidity of bearing high improves running precision.
In general, carrying out pretension to rolling bearing.The pretension of rolling bearing is applied during or after bearing is loaded
Plus it is certain preload, make the rolling element of bearing, certain predeformation set up between inner ring, outer ring, thus the inner ring of bearing and
Outer ring keeps being in impaction state.
Pretension is carried out to bearing can increase the rigidity of bearing, improve the positioning precision and running accuracy of bearing, lower axle
The vibration held and noise, prevent bearing from being skidded in high speed, improve the service life of bearing.
In the prior art, for example in injection pump, preloaded bearing is carried out usually using adjust pad.Therefore, for difference
Application requirement, the injection pump for different model, even for same injection pump due between each part manufacturing tolerance it is different, lead
Cause to need the hundreds and thousands of kinds of adjust pads of different-thickness, for by bearing pre-tightened to desired degree.Thus have and be manufactured into
This height, assembling spend big defect.
Utility model content
The purpose of this utility model seeks to overcome above-mentioned at least one defect of the prior art, proposes a kind of improved
Injection pump.
Therefore, according to one side of the present utility model, proposing a kind of injection pump, it has：Pump case；Camshaft；The
One bearing and second bearing, the clutch shaft bearing and the second bearing are provided for the camshaft supporting in the pump case
In body, and the clutch shaft bearing and the second bearing are respectively with corresponding first axial end backstop on the camshaft
Axial limiting portion on；Wherein, the injection pump also has：First radial bearing and the second radial bearing, described first
Radial bearing and the second radial bearing hold the clutch shaft bearing and the second bearing in radially outer bag respectively；For pre-
The adjusting nut that mandrel holds, the outer peripheral face of the adjusting nut is provided with external screw thread, and the external screw thread is radially propped up with described first
Internal thread in bearing member is correspondingly constructed, with first axial end opposite of the adjusting nut in the clutch shaft bearing
Clutch shaft bearing described in pretension and the second bearing on two axial ends.
In an optional embodiment, the clutch shaft bearing and the second bearing are taper roll bearing or corner connection
Touch ball bearing.
In an optional embodiment, the axial limiting portion is the convex shoulder on the camshaft.It is optional at one
Embodiment in, the axial limiting portion is provided in the snap ring on the camshaft.
It is axial with the second of the clutch shaft bearing in the adjusting nut in the axial direction in an optional embodiment
The first spring element is provided between end face.In an optional embodiment, another axle for the second bearing is provided with
To limiting section, in the axial direction in opposite with the first axial end of another axial limiting portion and the second bearing
Second spring element is provided between two axial ends.
In an optional embodiment, first spring element and/or the second spring element are dish-shaped bullets
Spring, ripple spring or helical compression spring.In an optional embodiment, in the direction of the adjusting nut described
The end side surface of one bearing is provided with the boss for supporting first spring element.In an optional embodiment,
Another axial limiting portion is provided with the boss for supporting the second spring element.
In an optional embodiment, be provided with the end face side outside the direction of the adjusting nut for work
The notch that tool is engaged.
In an optional embodiment, the outer peripheral face of the inner peripheral surface of the adjusting nut and the camshaft is radially
On separate spacing.
In the optional embodiment, it is provided with the inner peripheral surface of the adjusting nut for being engaged with instrument
Type is wide.In an optional embodiment, between the inner peripheral surface of the adjusting nut and the outer peripheral face of the camshaft
Seal is provided with radial space.In an optional embodiment, the clutch shaft bearing has outer ring and inner ring, the tune
Whole nut directly or indirectly abuts in and pretension is carried out on the outer ring of the clutch shaft bearing, also, the adjusting nut is interior straight
Interior diameter of the footpath less than the outer ring of the clutch shaft bearing.
In an optional embodiment, first radial bearing is an end cap of the injection pump, the axle
Hold and be received in the pass through openings of the linear of the end cap.In an optional embodiment, described second radially props up
Bearing member is the notch being integratedly integrated in the pump case.
In an optional embodiment, first radial bearing and/or second radial bearing with
The guide frame for bearing is provided with the side for loading bearing.
According to the utility model, the structure of injection pump can be optimally designed, especially be optimized in terms of bearing pre-tightened.Can
The adjust pad of substantial amounts of different-thickness is saved, manufacturing cost is reduced.Can simplify manufacture and assembling.Setting can accurately be adjusted
For the pretightning force of bearing.
Brief description of the drawings
Embodiment of the present utility model is described in detail below with reference to accompanying drawings, in accompanying drawing：
Fig. 1 shows a kind of exploded partial perspective view of the injection pump according to prior art, and the injection pump has basis
The bearing pre-tightened component of prior art；
Fig. 2 shows the part sectioned view of the injection pump according to prior art of Fig. 1, and the injection pump has according to existing
The bearing pre-tightened component of technology；
Fig. 3 shows a kind of exploded partial perspective view according to injection pump of the present utility model, and the injection pump has root
According to bearing pre-tightened component of the present utility model, for camshaft；And
Fig. 4 shows the part sectioned view according to injection pump of the present utility model of Fig. 3, and the injection pump has according to this
Utility model, bearing pre-tightened component for camshaft.
Specific embodiment
In detailed description below, with reference to each accompanying drawing, the accompanying drawing constitutes the part of this specification.In each accompanying drawing
In, same or analogous reference generally represents same or analogous part, unless otherwise indicated in the text.Specifically
Embodiment and accompanying drawing described in bright are not meant to restricted.Without departing substantially from purport of the present utility model and/or
In the case of scope, other embodiments can be used, carry out other changes.It should be understood that it is totally being described in this specification and
The each side of the present utility model shown in accompanying drawing can be arranged, replace, combine, separate and be set with a variety of configurations
Meter.
Figures 1 and 2 show that a kind of part of injection pump according to prior art.Fig. 1 is shown according to prior art
Injection pump, bearing pre-tightened component for camshaft 5 exploded partial perspective view；Fig. 2 shows injection pump, the use of Fig. 1
In the part sectioned view of the bearing pre-tightened component of camshaft 5.
In the injection pump of the prior art, side of the camshaft 5 in both sides respectively by bearing a 3a, 3b that can rotate
Formula is supported in pump case 6.Convex shoulder 8 is provided with camshaft 5, two bearings 3a and 3b are respectively by the corresponding first axial direction
End face backstop is on the convex shoulder 8.End cap 11 has circular radial direction protruding head 11a for limited bearing 3a and the first axial end
The axial location of the second opposite axial end of face, also, end cap 11 holds bearing 3a in radially outer bag, so as to radially and
The position of limited bearing 3a on axial direction.End cap 11 is fixed on the side of pump case 6, such as by force closure and/or shape
The mode that shape is sealed and/or material is sealed is fixed on the side of pump case 6.Set between end cap 11 and bearing 3 in the axial direction
There is disk spring 2 for providing pretightning force.Disk spring 2 abuts in the flat surfaces of the radial direction protruding head 11a of end cap 11 on side
On, abut on another side on the outer ring of bearing 3a.In order that bearing 3a and 3b regulation setting will be required pretightning force and/or
In order that bearing 3a and 3b the regulation suitable axial location of setting, adjusting pad is used in the axial direction between bearing 3a and convex shoulder 8
Piece 4.In actual applications, it is suitable for different application demand and/or in order to compensate dependent part to set different pretightning forces
All manufacturing tolerances of part, it usually needs prepare the adjust pad 4 of a large amount of different-thickness for using.The tune of a large amount of different-thickness
Whole pad 4 causes the high cost in manufacture.Further, since the rigidity difference of associated components causes what this was set by Interference size
Pretightning force has big deviation.
The utility model advises a kind of improved injection pump.Fig. 3 and Fig. 4 show one kind according to oil spout of the present utility model
The part of pump.Fig. 3 shows the part point of bearing pre-tightened component according to injection pump of the present utility model, for camshaft 5
Solution stereogram；Fig. 4 shows the part sectioned view of bearing pre-tightened component injection pump, for camshaft 5 of Fig. 3.
In the specific embodiment of the injection pump, camshaft 5 is in both sides respectively by a bearing 3a and 3b can turn
Dynamic mode is supported in pump case 6.The bearing 3a and 3b is respectively with the first axial end 31a and 31b backstop in cam
In axial limiting portion on axle 5.In the implementations shown in the figures, the axial limiting portion is the convex shoulder on camshaft 5
8, bearing 3a and 3b are bearing directly against on convex shoulder 8 in the axial direction, for the first axial end 31a and 31b in bearing 3a and 3b
The upper limit determines axial location.It should be understood that being alternative in convex shoulder 8, it is also possible to set other axial limit structure (examples on camshaft 5
Such as snap ring) for bearing 3a and/or 3b the first axial end 31a and/or 31b it is spacing.The injection pump has radial support
Part, is respectively used to hold bearing 3a and 3b in radially outer bag, so as to the radial position of limited bearing 3a and 3b.In shown embodiment party
In formula, for bearing 3a, the radial bearing is end cap 12, and for bearing 3b, the radial bearing is one
It is integrated in the notch in pump case 6 body.End cap 12 is fixed on the side of pump case 6, such as by force closure and/or shape
The sealed mode of sealed and/or material is fixed on the side of pump case 6.There is inner space in end cap 12, shown in this
End cap 12 is medially provided with pass through openings in inner radial in implementation method.In one embodiment, the through hole is transversal
See it is linear on face, that is to say, that the pass through openings are in cross section without ladder.End cap 12 is by its insertion
Bearing 3a is held in radially outer bag in opening.In other words, bearing 3a abuts in the pass through openings of end cap 12 in radially outer
On inner peripheral surface.In one preferred embodiment, the pass through openings of end cap 12 have on the side for loading bearing 3a
Guide frame 12a (such as guiding surface), coordinates in order to the installation between bearing 3a and end cap 12.On another side, bearing
3b is on the inner peripheral surface of the notch that radially outer abuts in pump case 6.In one preferred embodiment, the notch
There is guide frame 6b (such as guiding surface) on the side for loading bearing 3b, in order to bearing 3b and pump case 6 it
Between installation coordinate.Although in shown implementation method, the radial bearing of bearing 3a or 3b is mounted in pump case 6
End cap 12 or the notch that is integrally integrated in pump case 6, however, it is understood that the radial bearing of bearing can also
It is other suitable structure types, the radial bearing can circumferentially be wrapped and hold bearing throughout the circumferential, it is also possible to for
Specific topology requirement is in circumferential direction to disconnect.
According to basic conception of the present utility model, eliminate used between bearing 3 and convex shoulder 8 adjust pad 4 (referring to
In the prior art of Fig. 1 and 2), alternatively, in the second axial end surface side 32a opposite with the first axial end 31a of bearing 3a
Upper use adjusting nut 7, the pretightning force of setting bearing 3a, 3b and the axle of limited bearing are adjusted by the adjusting nut 7
To position.The adjusting nut 7 has external screw thread 71, the external screw thread 71 and the radial direction branch on the outer peripheral face of radially outer
The internal thread of bearing member (being end cap 12 in the implementation method shown in this) is accordingly constructed, to enable adjusting nut 7 to lead to
Cross and be screwed into the inner space of radial bearing along the rotation of the first rotation direction (as shown in the arrow in Fig. 3 and 4).So as to
The adjusting nut 7 by screw thread rotation can in the axial direction towards bearing 3a the second axial end 32a shift, and by
In the self-locking function of screw thread, the adjusting nut 7 can be locked in certainly after with predetermined pretightning force preloaded bearing 3a and 3b
On the axial location.Although in the implementation method shown in this, adjusting nut 7 is on the second axial end surface side 32a of bearing 3a
Pretension is carried out, however, it is understood that retrofited by appropriate, alternatively or additionally, can be in the second axial end surface side 32b of bearing 3b
Upper setting adjusting nut, for carrying out pretension to bearing 3a and 3b.In one embodiment, outside the direction of adjusting nut 7
The end face side in portion is provided with the notch for being engaged with instrument (such as torque spanner), described so that adjusting nut 7 is screwed into
In radial bearing and it is held in place by.In one embodiment, the inner peripheral surface of adjusting nut 7 and camshaft 5
Outer peripheral face separates spacing.In a detailed embodiment, overall diameter of the interior diameter of adjusting nut 7 more than camshaft 5.Substitute
In the implementation method that instrument notch is provided with the outer end surface side of adjusting nut 7, use can be provided with the inner peripheral surface of adjusting nut 7
It is wide in the type being engaged with instrument, so that adjusting nut 7 to be screwed into radial bearing and be held in place by.At one
In implementation method, seal can be provided with the radial space between the inner peripheral surface of adjusting nut 7 and the outer peripheral face of camshaft 5
(such as sealing ring), for sealing the pump case 6 relative to external environment condition.In the implementation method shown in this, bearing 3a tools
There are outer ring and inner ring, adjusting nut 7 can be abutted in directly or indirectly carries out pretension on the outer ring of bearing 3a, also, adjustment spiral shell
The interior diameter of outer ring of female 7 interior diameter less than bearing 3a.Thus preloaded bearing especially solid and reliablely can be realized.In a reality
Apply in mode, be provided with spring element between adjusting nut 7 and bearing 3a in the axial direction.In the implementation method shown in this, pump
Housing 6 has radially inner radial direction protruding head 63, used as another axial limiting portion for bearing 3b.Alternatively or additionally,
Spring element can be provided between another axial limiting portion and the second axial end 32b of bearing 3b in the axial direction.It is described
Spring element for example can be disk spring 2, ripple spring or helical compression spring.Thus, it is possible to the pretensioning effect for obtaining.
This is shown in preferred embodiment, in adjusting nut 7 towards being provided with for support spring element in the end side surface of bearing 3a
Boss 72.As can see in Fig. 4, the end of the inner radial of disk spring 2 is supported on the boss 72, thus
The reliable installation of spring element can particularly simply be realized.Alternatively or additionally, also can be in another axial limiting portion
It is provided with the boss for support spring element.
The utility model proposes improved injection pump in, with an adjusting nut 7 come instead of of the prior art big
Various sizes of adjust pad is measured, thus, it is possible to significantly reduce manufacturing cost.Meanwhile, can directly by the screwing force of adjusting nut 7
Thus square can be excluded due to the different influences for producing of associated components rigidity come the pretightning force needed for accurately setting.
Although describing two bearing 3a and 3b in specific embodiment of the present utility model on fuel injection camshaft 5
Pretension, however, it is understood that the utility model can also be used for pretension only one bearing or more bearings on injection pump.
Herein, " first " and " second " only represents the differentiation one by one to multiple similar technique features, do not indicate that including sequence etc. its
His meaning.
The utility model is particularly suited for pretension taper roll bearing or angular contact ball bearing in injection pump.It should be understood that
In the case of without departing substantially from the utility model purport, the situation for being applied to other suitable bearings is also feasible.
It should be understood that the utility model is not limited to foregoing description.In the feelings without departing substantially from spirit and scope of the present utility model
Under condition, the utility model can in a variety of ways modify and change.
Claims (10)
1. injection pump, it has：
- pump case (6)；
- camshaft (5)；
- clutch shaft bearing (3a) and second bearing (3b), the clutch shaft bearing (3a) and the second bearing (3b) be provided for by
The camshaft (5) is supported in the pump case (6), and the clutch shaft bearing (3a) and the second bearing (3b) are respectively
With corresponding first axial end (31a, 31b) backstop in the axial limiting portion on the camshaft (5)；
Characterized in that, the injection pump also has：
- the first radial bearing and the second radial bearing, first radial bearing and the second radial bearing exist respectively
Radially outer bag holds the clutch shaft bearing (3a) and the second bearing (3b)；
- for the adjusting nut (7) of preloaded bearing, the outer peripheral face of the adjusting nut (7) is provided with external screw thread (71), described outer
Screw thread (71) is correspondingly constructed with the internal thread on first radial bearing, and the adjusting nut (7) is in the first axle
Hold on second axial end (32a) opposite with the first axial end (31a) of (3a) clutch shaft bearing (3a) described in pretension and
The second bearing (3b).
2. injection pump according to claim 1, it is characterised in that
The clutch shaft bearing (3a) and the second bearing (3b) are taper roll bearing or angular contact ball bearing.
3. injection pump according to claim 1 and 2, it is characterised in that
The axial limiting portion is the convex shoulder (8) on the camshaft (5), and/or
The axial limiting portion is provided in the snap ring on the camshaft (5).
4. injection pump according to claim 1 and 2, it is characterised in that
Is provided between the second axial end (32a) of the adjusting nut (7) with the clutch shaft bearing (3a) in the axial direction
One spring element,
And/or
Another axial limiting portion for the second bearing (3b) is provided with, in the axial direction in another axial limiting portion and institute
Second spring is provided between second axial end (32b) opposite with the first axial end (31b) for stating second bearing (3b)
Element.
5. injection pump according to claim 4, its feature exists,
First spring element and/or the second spring element are disk spring (2), ripple spring or helical pressure bullet
Spring,
And/or
It is provided with for supporting first spring in the end side surface of the direction clutch shaft bearing (3a) of the adjusting nut (7)
The boss (72) of element, and/or, it is provided with for supporting the convex of the second spring element in another axial limiting portion
Platform.
6. injection pump according to claim 1 and 2, it is characterised in that
The notch for being engaged with instrument is provided with end face side outside the direction of the adjusting nut (7).
7. injection pump according to claim 1 and 2, it is characterised in that
The inner peripheral surface of the adjusting nut (7) diametrically separates spacing with the outer peripheral face of the camshaft (5).
8. injection pump according to claim 6, it is characterised in that
The type exterior feature for being engaged with instrument is provided with the inner peripheral surface of the adjusting nut (7),
And/or
Sealing is provided with radial space between the inner peripheral surface of the adjusting nut (7) and the outer peripheral face of the camshaft (5)
Part,
And/or
The clutch shaft bearing (3a) has outer ring and inner ring, and the adjusting nut (7) directly or indirectly abuts in described first
Pretension is carried out on the outer ring of bearing (3a), also, the interior diameter of the adjusting nut (7) is outer less than the clutch shaft bearing (3a)
The interior diameter of circle.
9. injection pump according to claim 1 and 2, it is characterised in that
First radial bearing is an end cap (12) of the injection pump, and the bearing (3a) is received in the end cap
(12) in the pass through openings of linear,
And/or
Second radial bearing is the notch being integratedly integrated in the pump case (6).
10. injection pump according to claim 1 and 2, it is characterised in that
First radial bearing and/or second radial bearing are for loading bearing (3a；Set on side 3b)
There is the guide frame (12a for bearing；6b).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621101458.7U CN206206041U (en) | 2016-09-30 | 2016-09-30 | Injection pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621101458.7U CN206206041U (en) | 2016-09-30 | 2016-09-30 | Injection pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206206041U true CN206206041U (en) | 2017-05-31 |
Family
ID=58762027
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621101458.7U Active CN206206041U (en) | 2016-09-30 | 2016-09-30 | Injection pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206206041U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113574295A (en) * | 2019-05-13 | 2021-10-29 | 舍弗勒技术股份两合公司 | Chassis actuator and method for operating a transmission assembly of a chassis actuator |
-
2016
- 2016-09-30 CN CN201621101458.7U patent/CN206206041U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113574295A (en) * | 2019-05-13 | 2021-10-29 | 舍弗勒技术股份两合公司 | Chassis actuator and method for operating a transmission assembly of a chassis actuator |
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