CN207673787U - A kind of three-cylinder engine balance weight - Google Patents
A kind of three-cylinder engine balance weight Download PDFInfo
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- CN207673787U CN207673787U CN201721923407.7U CN201721923407U CN207673787U CN 207673787 U CN207673787 U CN 207673787U CN 201721923407 U CN201721923407 U CN 201721923407U CN 207673787 U CN207673787 U CN 207673787U
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- balance weight
- cylinder engine
- annular body
- engine balance
- type grooves
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Abstract
The utility model discloses a kind of three-cylinder engine balance weights.The device belongs to powder metallurgical technology, solve the problems, such as that the full interference connection of balance weight in the prior art, density is small, use scope is narrow, including the first annular body and the second annular solid being wholely set up and down, the middle part of first and second annular solid junctions is equipped with D type grooves, cambered surface transition at D type groove surface transitions by being linked in sequence and opening direction is opposite, circular shaft bore is equipped at D type groove slot bottoms center, axis hole side is equipped with through-hole, and the other side is equipped with arc groove.The utility model is connect by D type grooves with balance shaft portion interference, avoid that lead to the problem of stress indefinite because full interference connects, transition position is all made of arc transition, it prevents from leading to the problem of cutting damage in balance weight rotary course, copper sheet is oozed by the setting on balance weight surface, copper is penetrated into iron-based using capillarity, balance weight density is made to be up to 7.8g/cm3, the use scope of balance weight is enabled to be expanded.
Description
Technical field
The utility model belongs to powder metallurgical technology, specifically, more particularly to a kind of three-cylinder engine balance
Block.
Background technology
The effect that balance weight, which primarily serves, to be improved stress distribution, reduce noise and damping, is that many mechanical equipments are indispensable
Few auxiliary component, in actual production, the shape of mechanical device, the difference of size and stress need to select different heavy
The balance weight of amount, density are an important parameters of balance weight, directly determine the volume and weight of balance weight.Currently on the market
Mostly powder metallurgical technique is used to manufacture balance weight, but not only density is generally relatively low for manufactured balance weight, use scope receives greatly
Limit, and be mostly that full interference connects, it is indefinite to be easy to cause stress, easily sliding the problem of.
Invention content
The utility model aim is to provide a kind of part interference connection, the three-cylinder engine that density is big, use scope is wide
Use balance weight.
In order to achieve the above technical purposes, the technical solution that the utility model three-cylinder engine is used with balance weight for：
A kind of three-cylinder engine balance weight, including the first annular body and the second annular solid that are wholely set up and down, it is described
The middle part of first annular body and the second annular solid junction is equipped with D type grooves for connecting bent axle, at the D type grooves surface transition
By the cambered surface transition being linked in sequence and opening direction is opposite, circular shaft bore, the axis hole one are equipped at the D type grooves slot bottom center
Side is equipped with the through-hole for being placed in first annular body surface face, and the other side is equipped with the arc groove for being placed in first annular body edge.
Preferably, the first annular body diameter is more than the second annular solid diameter.
Preferably, the first annular body back side is equipped with arc flanging.
Preferably, the through-hole hole heart is equal with the axis hole vertical centerline and horizontal centre linear distance, is
14mm。
Preferably, the arc groove center and first annular body body bottom distance are 6.4mm.
Preferably, the D type grooves length of straight flange is 6~6.4mm, a diameter of 18mm of slot.
Preferably, the density of the balance weight is 7.8g/cm3.The density for promoting engine balance block is started to expand
The use scope of machine balance weight.
Preferably, the hardness number of the balance weight is not less than HRB60.
Preferably, the preparation method of the three-cylinder engine balance weight, iron powder and carbon dust are inserted into after mixing
In shape machine former, green compact are made in the quick compression moulding under 150~160T forming pressures, then that copper powder is placed in forming machine is identical
Compression moulding is carried out in former, is made and oozes copper sheet, copper sheet will be oozed and is placed in after green surface and integrally put into sintering furnace, is protected in nitrogen
Under shield, guipure is advanced with 120mm/min, is passed through 790 DEG C of preheating zone, four sections 1120 DEG C of sintering zone and cooling zone successively and is burnt
Sintered blank is made in knot, after carrying out sandblasting deburring, immersion oil processing to sintered blank, then is placed under smart shaping mould and carries out compacting essence
Shaping finally carries out clean ultrasound, oil immersion, packaging after testing after qualification.
Preferably, the powder metallurgy group is divided into：C：0.6~0.7%, Cu：10%, remaining is Fe.
Compared with prior art, the utility model has the beneficial effects that：
1, the utility model is connect by D type grooves with the interference of bent axle part, prevents from generating stress shape because full interference connects
The indefinite problem of state avoids the problem that balance weight occurs to slide and then be damaged with the rotation of bent axle；
2, transition position is all made of arc transition in the utility model, prevents from generating cutting damage in balance weight rotary course
Problem；
3, the utility model oozes copper sheet by the setting on balance weight surface, penetrates into iron-based copper using capillarity, makes
Balance weight density is up to 7.8g/cm3, significantly extend the use scope of balance weight.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the portions the A enlarged diagram of the utility model.
In figure：1. first annular body；2. the second annular solid；3.D type grooves；4. cambered surface；5. axis hole；6. through-hole；7. arc groove.
Specific implementation mode
With reference to the accompanying drawings and detailed description, the utility model is furtherd elucidate, it should be understood that these embodiments are only
For illustrating the utility model rather than limitation the scope of the utility model, after having read the utility model, this field
Technical staff falls within the application range as defined in the appended claims to the modification of the various equivalent forms of the utility model.
As shown in Fig. 1-Fig. 2, a kind of three-cylinder engine balance weight, including 1 He of first annular body that is wholely set up and down
Second annular solid 2, the middle part of 1 and second annular solid of first annular body, 2 junction are equipped with the D type grooves 3 for connecting bent axle,
By 4 transition of cambered surface being linked in sequence and opening direction is opposite at 3 surface transition of D type grooves, at 3 slot bottom center of the D type grooves
Equipped with circular shaft bore 5,5 side of the axis hole is equipped with the through-hole 6 for being placed in 1 surface of first annular body, and the other side is equipped with and is placed in first
The arc groove 7 at 1 edge of annular solid, 1 diameter of first annular body is more than 2 diameter of the second annular solid, described first annular
1 back side of body is equipped with arc flanging, and the 6 hole heart of the through-hole is equal with 5 vertical centerline of the axis hole and horizontal centre linear distance,
It is 14mm, 7 center of the arc groove and 1 bottom of first annular body distance are 6.4mm, 3 length of straight flange of D type grooves is 6~
6.4mm, a diameter of 18mm of slot.
Iron powder and carbon dust are inserted the moon of forming machine by the preparation method of the three-cylinder engine balance weight after mixing
In mould, the quick compression moulding under 150~160T forming pressures is made green compact, then copper powder is placed in the identical former of forming machine
Compression moulding is carried out, is made and oozes copper sheet, copper sheet will be oozed is placed in after green surface and integrally put into sintering furnace, under nitrogen protection,
Guipure is advanced with 120mm/min, passes through 790 DEG C of preheating zone, four sections 1120 DEG C of sintering zone and cooling zone sintering, system successively
It is 7.8g/cm to obtain density3, hardness number is not less than the balance weight sintered blank of HRB60, to sintered blank progress sandblasting deburring, immersion oil
It after processing, then is placed under smart shaping mould and carries out compacting finishing shape, finally carry out clean ultrasound, oil immersion, packet after qualification after testing
Dress, wherein powder metallurgy group are divided into：C：0.6~0.7%, Cu：10%, remaining is Fe.
The utility model density reaches 7.8g/cm3, there is larger use scope, while bent axle is connected using D type grooves, enable
There is stronger compactness, transmission process to stabilize for connection, and use powder metallurgically manufacturing technique, and speed of production is fast, favorably
In mass production.
Claims (8)
1. a kind of three-cylinder engine balance weight, including the first annular body and the second annular solid that are wholely set up and down, feature
It is：The middle part of the first annular body and the second annular solid junction is equipped with the D type grooves for connecting bent axle, the D type grooves
By the cambered surface transition being linked in sequence and opening direction is opposite at surface transition, circular shaft bore is equipped at the D type grooves slot bottom center,
The axis hole side is equipped with the through-hole for being placed in first annular body surface face, and the other side is equipped with the arc for being placed in first annular body edge
Slot.
2. three-cylinder engine balance weight according to claim 1, it is characterised in that：The first annular body diameter is more than
The second annular solid diameter.
3. three-cylinder engine balance weight according to claim 2, it is characterised in that：The first annular body back side is equipped with
Arc flanging.
4. three-cylinder engine balance weight according to claim 1, it is characterised in that：The through-hole hole heart and the axis hole
Vertical centerline and horizontal centre linear distance are equal, are 14mm.
5. three-cylinder engine balance weight according to claim 1, it is characterised in that：The arc groove center and the first ring
Body body bottom distance is 6.4mm.
6. three-cylinder engine balance weight according to claim 1, it is characterised in that：The D type grooves length of straight flange be 6~
6.4mm, a diameter of 18mm of slot.
7. three-cylinder engine balance weight according to claim 1, it is characterised in that：The density of the balance weight is
7.8g/cm3。
8. three-cylinder engine balance weight according to claim 1, it is characterised in that：The hardness number of the balance weight is not small
In HRB60.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721923407.7U CN207673787U (en) | 2017-12-29 | 2017-12-29 | A kind of three-cylinder engine balance weight |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721923407.7U CN207673787U (en) | 2017-12-29 | 2017-12-29 | A kind of three-cylinder engine balance weight |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207673787U true CN207673787U (en) | 2018-07-31 |
Family
ID=62973067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721923407.7U Active CN207673787U (en) | 2017-12-29 | 2017-12-29 | A kind of three-cylinder engine balance weight |
Country Status (1)
| Country | Link |
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| CN (1) | CN207673787U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113847388A (en) * | 2021-09-22 | 2021-12-28 | 安徽恒均粉末冶金科技股份有限公司 | Powder metallurgy balance block for engine crankshaft and production process thereof |
-
2017
- 2017-12-29 CN CN201721923407.7U patent/CN207673787U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113847388A (en) * | 2021-09-22 | 2021-12-28 | 安徽恒均粉末冶金科技股份有限公司 | Powder metallurgy balance block for engine crankshaft and production process thereof |
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