CN209146226U - Double balance shaft structure - Google Patents
Double balance shaft structure Download PDFInfo
- Publication number
- CN209146226U CN209146226U CN201822076231.7U CN201822076231U CN209146226U CN 209146226 U CN209146226 U CN 209146226U CN 201822076231 U CN201822076231 U CN 201822076231U CN 209146226 U CN209146226 U CN 209146226U
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- CN
- China
- Prior art keywords
- connecting rod
- balance shaft
- evacuation
- balance
- double
- 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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Abstract
The utility model discloses a kind of double balance shaft structures, are fixedly mounted on body, are driven by crankshaft, and the double balance shaft structure needs evacuation connecting rod during exercise, which includes: balance axle bed, and bushing is mounted in the balance axle bed；Balance shaft is mounted in the inner hole of the bushing；Gear is mounted in the balance shaft；Cover board is mounted on one end of the balance shaft；Balance weight and thrust plate, the balance weight and thrust plate are installed in the balance shaft；And it at evacuation connecting rod, is provided in the balance shaft, for avoiding connecting rod；Wherein, the groove for avoiding plane with connecting rod for two is opened up at the evacuation connecting rod, so that being flat axle construction at the evacuation connecting rod；The double balance shaft structure is designed to flat axle construction at evacuation link motion track, to be formed in evacuation connecting rod within the scope of certain angle, not only reaches arrangement and requires but also reach high rigidity requirement, to improve balance shaft part reliability.
Description
Technical field
The utility model is about engine art, especially with regard to a kind of double balance shaft structure.
Background technique
As people are higher and higher to NVH (noise, vibration and sound vibration roughness) performance requirement, NVH has become engine
One of important performance assessment criteria of comprehensive performance.Double balance shaft mechanism is with being elimination or reducing two-stage reciprocating inertia force, substantially
Improve engine NVH performance；But because balance shaft revolving speed is 2 times of speed of crankshaft, easily there is abrasion, burns in kinematic pair at high speed
Easily there is bushing partial friction, therefore balance shaft has enough rigidity especially in the case where balance shaft distortion is big in the failures such as axis
There is very important influence to the reliability of balance shaft.
The information disclosed in the background technology section is intended only to increase the understanding to the general background of the utility model, and
It is not construed as recognizing or implying in any form that information composition is already known to those of ordinary skill in the art existing
Technology.
Utility model content
The purpose of this utility model is to provide a kind of double balance shaft structures, and the double balance shaft structure is in evacuation link motion
It is designed to flat axle construction at track, to be formed in evacuation connecting rod within the scope of certain angle, not only reaches arrangement and requires but also reach high
Rigidity requirement, to improve balance shaft part reliability.
To achieve the above object, the utility model provides a kind of double balance shaft structure, is fixedly mounted on body, by
Crankshaft driving, the double balance shaft structure need evacuation connecting rod during exercise, and the double balance shaft structure includes: balance axle bed, lining
Set, is mounted in the balance axle bed；Balance shaft is mounted in the inner hole of the bushing, is formed and is moved with the bushing
It is secondary；Gear is mounted in the balance shaft, and the gear is driven by the crankshaft and then drives the rotation of the balance shaft；
Cover board is mounted on one end of the balance shaft；Balance weight and thrust plate, the balance weight and thrust plate are installed in described flat
It weighs on axis；And it at evacuation connecting rod, is provided in the balance shaft, for avoiding connecting rod；Wherein, quilt at the evacuation connecting rod
The groove for avoiding plane with connecting rod for two is opened up, so that being flat axle construction at the evacuation connecting rod.
Above-mentioned double balance shaft structure disclosed in the utility model is fully considering engine space knot on organic type
On the basis of structure and size limitation, carry out layout design double balance shaft machine by the requirement for eliminating two-stage reciprocating inertia force to greatest extent
Structure.Balance shaft design requirement needs enough rigidity, otherwise deforms the excessive eccentric wear for easily causing bushing, while balance shaft
It needs to avoid link motion, avoid interference with.Balance shaft stress deformation in operation process, it is desirable that axle journal is made bigger rigidity more
It is good, but the movement of connecting rod is avoided simultaneously, it is desirable that axle journal is made smaller, easier evacuation；In terms of link motion track, balance shaft
Line position is fixed, connecting rod in continuous motion process in the angular range of only one very little with balance shaft there are evacuation demand,
Other positions are all not present evacuation demand, and balance shaft is made into flat axis form in the movement of a certain section of angle evacuation connecting rod, both can be with
The rigidity that connecting rod also improves axis to a certain extent is effectively avoided, to improve the reliability of double balance shaft.
In a preferred embodiment, the width of the connecting rod evacuation plane is greater than the width of connecting rod, the groove
Depth is determined by the relative movement orbit of the connecting rod and the flat horizontal axis.
In a preferred embodiment, the minimum range between the connecting rod and connecting rod evacuation plane is not less than
5mm。
In a preferred embodiment, the connecting rod evacuation plane can be replaced connecting rod evacuation nonplanar structure, institute
Stating connecting rod evacuation nonplanar structure includes the connecting rod evacuation plane of connecting rod evacuation curved surface and balance shaft with balance weight after integrated
With the combination of curved surface.
In a preferred embodiment, the connecting rod avoids the minimum range between nonplanar structure and the connecting rod not
Lower than 5mm.
Compared with prior art, double balance shaft structure described in the utility model has the following beneficial effects:
Double balance shaft structure involved in the utility model increases connecting rod and avoids plane, so that evacuation linkage arrangement and raising
The contradiction of balance shaft rigidity is resolved, and improves the reliability of double balance shaft mechanism；Balance shaft and original structure do not occur too simultaneously
It is big to change, only increase connecting rod and avoid plane, technique easily realizes that cost is vulnerable to control.
Detailed description of the invention
Fig. 1 is balance shaft schematic diagram in the prior art；
Fig. 2 is the balance shaft schematic diagram according to one embodiment of the utility model；
Fig. 3 is the double balance shaft structural assembly diagram according to one embodiment of the utility model；
Fig. 4 is the angular range according to the evacuation link motion of one embodiment of the utility model.
Main appended drawing reference explanation:
1- cover board；2,2'- balance weights；3- bolt；4- thrust plate；5- gear；6- balance shaft；7- bushing；8- balances axle bed；
At 9,9'- evacuation connecting rods；10- connecting rod avoids plane；α-evacuation link motion angular range.
Specific embodiment
With reference to the accompanying drawing, specific embodiment of the present utility model is described in detail, it is to be understood that this is practical
Novel protection scope is not limited by the specific implementation.
Unless otherwise explicitly stated, otherwise in entire disclosure and claims, term " includes " or its change
Changing such as "comprising" or " including " etc. will be understood to comprise stated element or component, and not exclude other members
Part or other component parts.
As shown in Figure 1, balance shaft in the prior art, the axle journal for avoiding 9' at connecting rod of balance shaft is in entire balance shaft
The scheme of evacuation connecting rod is all used in 360 ° of angle ranges, journal diameter is smaller at evacuation, and rigidity is smaller, shaft centre line deformation
Larger, reliability is not high.
As Figure 2-3, it according to a kind of double balance shaft structure of the preferred embodiments of the present invention, is fixedly mounted on
It on body, is driven by crankshaft, the double balance shaft structure needs evacuation connecting rod during exercise, and the double balance shaft structure includes: flat
Weigh axle bed 8, bushing 7, balance shaft 6, gear 5, cover board 1, balance weight 2,2' and thrust plate 4, and 9 at evacuation connecting rod；The lining
Set 7 is mounted in the balance axle bed 8；The balance shaft 6 is mounted in the inner hole of the bushing 7, is formed and is transported with the bushing 7
Dynamic pair；The gear 5 is mounted in the balance shaft 6, which is driven by the crankshaft and then driven the balance shaft 6
Rotation；The cover board 1 is mounted on one end of the balance shaft 6；The balance weight 2,2' and thrust plate 4 are installed in the balance
On axis 6；9 are provided in the balance shaft 6 at the evacuation connecting rod, for avoiding connecting rod；Wherein, 9 quilts at the evacuation connecting rod
Open up for two with connecting rod avoid plane 10 grooves so that at the evacuation connecting rod 9 be flat axle construction.
As a kind of preferred embodiment, the width of the connecting rod evacuation plane 10 is greater than the width of connecting rod.
As a kind of preferred embodiment, the minimum range between the connecting rod and connecting rod evacuation plane 10 is not less than
5mm。
As a kind of preferred embodiment, the connecting rod evacuation plane 10 can be replaced connecting rod evacuation nonplanar structure, institute
Stating connecting rod evacuation nonplanar structure includes that connecting rod evacuation curved surface and balance shaft 6 are kept away with the connecting rod of balance weight 2,2' after integrated
Allow the combination of plane and curved surface.
As a kind of preferred embodiment, the minimum range between the connecting rod evacuation nonplanar structure and the connecting rod is not low
In for 5mm.
As shown in Figure 2 and Figure 4, the balance shaft 6 in the double balance shaft structure of the utility model is mounted on balance axle bed 8
In 7 inner hole of bushing, balance 8 position of axle bed is fixed on the machine body i.e. 6 axial location of balance shaft and fixes, and crankshaft is in cylinder compression
When stop, the balance weight 2 in shaft member is balanced, 2' centroid position is to be directed toward oil sump straight down.When crankshaft per clockwise (from
Motor head observation) 1 ° of rotation, the gear shaft (the first balance shaft) that is meshed 2 ° of rotation counterclockwise in shaft member is balanced, by the
The one shaft-driven secondary balance shaft of balance then rotates clockwise 2 °, i.e. crank phase and 6 phase time of balance shaft has fixed pair
Answer position, and link motion track and crank phase also have fixed relationship, from this principle, can extract connecting rod phase and
6 phase relation of balance shaft, so that the angular range (i.e. the angle α in Fig. 4) of evacuation link motion is obtained, to confirm the position of evacuation
It sets, it is ensured that balance shaft 6 has enough rigidity, improves the reliability of double balance shaft mechanism.
The description of the aforementioned specific exemplary embodiment to the utility model is in order to illustrate and illustration purpose.These
Description is not wishing to for the utility model to be limited to disclosed precise forms, and it will be apparent that according to the above instruction, can carry out
It is many to change and change.The purpose of selecting and describing the exemplary embodiment is that explaining the specific principle of the utility model
And its practical application, so that those skilled in the art can be realized and utilize a variety of different examples of the utility model
Property embodiment and various chooses and changes.The scope of the utility model is intended to by claims and its waits similar shapes
Formula is limited.
Claims (5)
1. a kind of double balance shaft structure, is fixedly mounted on body, is driven by crankshaft, the double balance shaft structure is during exercise
Connecting rod need to be avoided, which is characterized in that the double balance shaft structure includes:
Axle bed is balanced,
Bushing is mounted in the balance axle bed；
Balance shaft is mounted in the inner hole of the bushing, forms kinematic pair with the bushing；
Gear is mounted in the balance shaft, and the gear is driven by the crankshaft and then drives the rotation of the balance shaft；
Cover board is mounted on one end of the balance shaft；
Balance weight and thrust plate, the balance weight and thrust plate are installed in the balance shaft；And
It avoids at connecting rod, is provided in the balance shaft, for avoiding connecting rod；
Wherein, the groove for avoiding plane with connecting rod for two is opened up at the evacuation connecting rod, so that at the evacuation connecting rod
For flat axle construction.
2. double balance shaft structure as described in claim 1, which is characterized in that the width of the connecting rod evacuation plane is greater than connecting rod
Width.
3. double balance shaft structure as described in claim 1, which is characterized in that between the connecting rod and connecting rod evacuation plane
Minimum range be not less than 5mm.
4. double balance shaft structure as claimed in claim 2, which is characterized in that the connecting rod evacuation plane can be replaced connecting rod
Nonplanar structure is avoided, the connecting rod evacuation nonplanar structure includes that connecting rod evacuation curved surface and balance shaft and balance weight are integrated
The combination of connecting rod evacuation plane and curved surface after change.
5. double balance shaft structure as claimed in claim 4, which is characterized in that the connecting rod evacuation nonplanar structure and the company
Minimum range between bar is not less than 5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822076231.7U CN209146226U (en) | 2018-12-10 | 2018-12-10 | Double balance shaft structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822076231.7U CN209146226U (en) | 2018-12-10 | 2018-12-10 | Double balance shaft structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209146226U true CN209146226U (en) | 2019-07-23 |
Family
ID=67289830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822076231.7U Active CN209146226U (en) | 2018-12-10 | 2018-12-10 | Double balance shaft structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209146226U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109322972A (en) * | 2018-12-10 | 2019-02-12 | 广西玉柴机器股份有限公司 | Double balance shaft structure |
-
2018
- 2018-12-10 CN CN201822076231.7U patent/CN209146226U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109322972A (en) * | 2018-12-10 | 2019-02-12 | 广西玉柴机器股份有限公司 | Double balance shaft structure |
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