CN202867696U - Crank shaft balance block - Google Patents
Crank shaft balance block Download PDFInfo
- Publication number
- CN202867696U CN202867696U CN201220429512.6U CN201220429512U CN202867696U CN 202867696 U CN202867696 U CN 202867696U CN 201220429512 U CN201220429512 U CN 201220429512U CN 202867696 U CN202867696 U CN 202867696U
- Authority
- CN
- China
- Prior art keywords
- crank shaft
- crankshaft
- receiving part
- load receiving
- joint
- 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 - Lifetime
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- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The utility model discloses a crank shaft balance block which is fixedly connected on a crank shaft arm. The crank shaft balance block comprises a load-bearing portion and a connection portion, and the top end of the connection portion is fixedly connected on the circumferential face of the crank shaft arm. The bottom end of the connection portion is fixedly connected with the load-bearing portion. Through utilization of increase of the distance between the mass center of the crank shaft balance block and the rotation axis of a crank shaft, large centrifugal force can be generated to counteract the inertia force generated from rotation of a connecting rod neck and a piston connecting rod set, improve balance effect of the crank shaft, and enable operation of the crank shaft to be more stable. Moreover, weight of the crank shaft is lightened, and manufacturing cost is reduced. The crank shaft balance block is suitable for being applied to crank shafts of various engines.
Description
Technical field
The utility model relates to a kind of bent axle, relates in particular to a kind of crankshaft counterbalance effect of improving, and makes the more stable crankshaft counter balance of crankshaft operation.
Background technique
Bent axle is one of part of most critical in the motor, and it cooperates the gas pressure that will act on the piston to become the power of rotation with connecting rod, pass to the driving mechanism on chassis, drives simultaneously distribution device and other auxiliary device.In the prior art, bent axle comprises main journal, connecting rod neck, equilibrium block and crank arm.Because bent axle is bearing pressure of explosion, reciprocal inertia force, rotating inertia force, so that bent axle carrying situation is very complicated, cause the deflection of crankshaft distortion serious, uneven rotation and vibration are very obvious, therefore, equilibrium block has played the effect that keeps balance and reduce to turn round nonuniformity.
Scientific and technological progress so that component towards the light-weight design future development, the structure of crankshaft counter balance directly affects bent axle weight.The conventional balanced piece is generally sector structure, the barycenter of equilibrium block is closer from the crankshaft rotating axis, the centrifugal force that produces is smaller, counterbalance effect is poor, although also can realize dynamic balancing, bent axle weight is large, if reach desirable counterbalance effect, will constantly increase the weight of equilibrium block, bent axle weight also increases thereupon.
On the other hand, High Rotation Speed during bent axle work, so the quality of balance directly affects the travelling comfort that car load is driven, if the counterbalance effect of equilibrium block is undesirable, vibration has occured in automobile, just impairs smoothness and the travelling comfort of automobile, and produces noise, accelerate tired driver, affect traffic safety.
The model utility content
For solving the deficiencies in the prior art, the utility model provides a kind of crankshaft counter balance, increased the distance of barycenter and the crankshaft rotating axis of crankshaft counter balance, can produce larger centrifugal force and offset the inertial force that the rotation of connecting rod neck and piston rod group produces, improved the crankshaft counterbalance effect, make crankshaft operation more stable, and alleviated bent axle weight, reduced fabricating cost.
For achieving the above object, the technological scheme that adopts of the utility model is as follows:
A kind of crankshaft counter balance is fixed on the crank arm, comprises load receiving part, and it also comprises the joint that bottom and load receiving part top connect firmly, and the top of joint is fixed on the crank arm outer circumferential face.
As restriction of the present utility model, described joint is the structure of necking down shape; The axial width of joint is less than radial width, and sagittal plane and axial vane surface intersection are the arc transition of radius 4-8mm.
As another kind of restriction the of the present utility model, the axial arrangement of described load receiving part is fan-shaped, the bottom surface of load receiving part is arc surface, the folding face structure that its top profile becomes for the plane that is 160-180 ° of obtuse angle by two angles, and the broken line place is to the distance of the bottom radius less than arc surface; The broken line at two Plane intersects places is parallel with the axis of crankshaft main journal and corresponding up and down; Plane and arc surface intersection are the cambered surface transition.
As further restriction, the barycenter of described crankshaft counter balance is positioned on the vertical center line of 1/3 the crankshaft main journal of load receiving part from the top to the bottom height.
Limit as of the present utility model the third, described joint and the crank arm place of connecting firmly are the arc transition of radius 7-10mm.
The utility model also has a kind of restriction, and described joint and the load receiving part place of connecting firmly are the arc transition of radius 7-10mm.
Owing to adopted technique scheme, the utility model compared with prior art, obtained technological progress is:
1. equilibrium block is divided into joint and load receiving part, strengthened the distance of barycenter and the main shaft rotating center of equilibrium block, offset the inertial force of the rotation generation of connecting rod neck and piston rod group to produce larger centrifugal force, thereby improved the crankshaft counterbalance effect, make crankshaft operation more stable;
2. the region of interest of joint own adopts arc transition, can avoid the stress concentration phenomenon, improves the equilibrium block join strength, has alleviated simultaneously the weight of joint;
3. the arc surface transition is adopted in the intersection between the plane, top of load receiving part and bottom arc surface, wedge angle occurs when avoiding casting and affects Forming Quality;
4. joint and the crank arm place of connecting firmly, joint and the load receiving part place of connecting firmly all adopt arc transition, molten iron flow and cooling forming when being conducive to cast, and increased the join strength of bent axle and joint, joint and load receiving part.
In sum, the utility model can improve the crankshaft counterbalance effect, alleviates bent axle weight, reduces fabricating cost.
The utility model is applicable on the various engine crankshafts.
Description of drawings
Below in conjunction with drawings and the specific embodiments the utility model is done further to describe in detail.
Fig. 1 is the utility model embodiment's axial arrangement schematic representation;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is the utility model embodiment's use state reference map;
Fig. 4 is the left view of Fig. 3.
Among the figure: 1, joint; 2, load receiving part; 3, crank arm; 4, the vertical center line of main journal; 5, barycenter; 6, the axis of main journal; α, load receiving part two intersect the angle on plane; The distance of R, barycenter 5 and crankshaft rotating axis.
Embodiment
Embodiment
A kind of crankshaft counter balance, structure comprise joint 1 and load receiving part 2 as shown in Figures 1 and 2.
Joint 1 is the structure of necking down shape, and its top is fixed on crank arm 3 outer circumferential faces, and the shape on top and crank arm 3 outer circumferential faces match, and as shown in Figure 3, and connects firmly the position and is positioned at crank arm 3 bottom radially.Joint 1 adopts arc transition with crank arm 3 places of connecting firmly, and the radius of circular arc can be selected in as between the 7-10mm.Take Crankshaft to as benchmark, the axial width of joint 1 is less than radial width, and sagittal plane and axial vane surface intersection adopt arc transition, and the radius of circular arc can be selected between the 4-8mm.
Joint 1 bottom and load receiving part 2 tops connect firmly, and the place of connecting firmly adopts arc transition, and the radius of circular arc can be selected between the 7-10mm.In the axial view (Fig. 1), load receiving part 2 is sector structure, load receiving part 2 bottom profiles are arc surface, the top profile is two intersecting planes, two plane intersection lines parallel with the axis 6 of crankshaft main journal and are corresponding up and down, and the scope that load receiving part two intersects the angle α on plane can be selected between 160-180 °.The top of load receiving part 2 is to the distance of the bottom radius less than cambered surface.The arc surface transition is adopted in the intersection of plane and arc surface.
Crankshaft counter balance weight mainly is distributed in load receiving part 2, and its barycenter 5 is positioned on the vertical center line 4 of 1/3 the crankshaft main journal of load receiving part 2 from the top to the bottom height.Because equilibrium block has been set up joint 1, in the identical situation of crank spindle diameter, barycenter 5 becomes large with the distance R of crankshaft rotating axis.According to the centrifugal force formula: F=MR ω
2As can be known, in the identical mass M situation, barycenter 5 is larger from the distance R of crankshaft rotating axis, the centrifugal force F that produces is larger, the rotating inertia force that rotation of rod journal and piston rod group produces when offsetting crankshaft operation with this, thus the crankshaft counterbalance performance improved, make crankshaft operation more steady.
Claims (6)
1. a crankshaft counter balance is fixed on the crank arm (3), comprises load receiving part (2),
It is characterized in that:It also comprises the joint (1) that bottom and load receiving part (2) top connect firmly, and the top of joint (1) is fixed on crank arm (3) outer circumferential face.
2. crankshaft counter balance according to claim 1,
It is characterized in that:Described joint (1) is the structure of necking down shape; The axial width of joint (1) is less than radial width, and sagittal plane and axial vane surface intersection are the arc transition of radius 4-8mm.
3. crankshaft counter balance according to claim 1,
It is characterized in that:The axial arrangement of described load receiving part (2) is fan-shaped, and the bottom surface of load receiving part (2) is arc surface, the folding face structure that its top profile becomes for the plane that is 160-180 ° of obtuse angle by two angles, and the broken line place is to the distance of the bottom radius less than arc surface; The broken line at two Plane intersects places parallels with the axis of crankshaft main journal (6) and is corresponding up and down; Plane and arc surface intersection are the cambered surface transition.
4. crankshaft counter balance according to claim 3,
It is characterized in that:The barycenter of described crankshaft counter balance (5) is positioned on the vertical center line (4) of 1/3 the crankshaft main journal of load receiving part (2) from the top to the bottom height.
5. crankshaft counter balance according to claim 1,
It is characterized in that:Described joint (1) and the arc transition of crank arm (3) place of connecting firmly for radius 7-10mm.
6. each described crankshaft counter balance according to claim 1-5,
It is characterized in that:Described joint (1) and the arc transition of load receiving part (2) place of connecting firmly for radius 7-10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220429512.6U CN202867696U (en) | 2012-08-28 | 2012-08-28 | Crank shaft balance block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220429512.6U CN202867696U (en) | 2012-08-28 | 2012-08-28 | Crank shaft balance block |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202867696U true CN202867696U (en) | 2013-04-10 |
Family
ID=48034418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220429512.6U Expired - Lifetime CN202867696U (en) | 2012-08-28 | 2012-08-28 | Crank shaft balance block |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202867696U (en) |
-
2012
- 2012-08-28 CN CN201220429512.6U patent/CN202867696U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130410 |
|
| CX01 | Expiry of patent term |