CN111230074A - Balancing device for baby carriage - Google Patents
Balancing device for baby carriage Download PDFInfo
- Publication number
- CN111230074A CN111230074A CN202010070611.9A CN202010070611A CN111230074A CN 111230074 A CN111230074 A CN 111230074A CN 202010070611 A CN202010070611 A CN 202010070611A CN 111230074 A CN111230074 A CN 111230074A
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- percent
- bearing
- balancing device
- sleeve
- die
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/16—Casting in, on, or around objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/14—Machines with evacuated die cavity
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/02—Alloys based on aluminium with silicon as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/06—Alloys based on copper with nickel or cobalt as the next major constituent
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
The invention provides a balancing device for a baby carriage, and belongs to the technical field of baby carriage accessories. It has solved current bearing and axle sleeve fit timing, and the assembly does not put in place can lead to dead eye edge pressure to warp or the axle sleeve is buckled, splits even, and the assembly difficulty has increaseed intensity of labour, can appear the condition that bearing length is greater than the length of dead eye to the problem such as the accuracy that has leaded to the product is not high, a balancing unit for perambulator, balancing unit's preparation technology includes following step: s01: sleeving a bearing copper sleeve outside the mold core; s02: when the die is closed and die-cast, molten aluminum alloy is poured on the outer side of the bearing copper sleeve through a runner to form the bearing sleeve; s03: and opening the mold to obtain the balancing device. The invention has the advantages of good fusion performance of the bearing copper sleeve and the bearing sleeve, and the like.
Description
Technical Field
The invention belongs to the technical field of baby carriage accessories, and particularly relates to a balancing device for a baby carriage.
Background
The baby carriage is a tool carriage designed for providing convenience for outdoor activities of babies, has various types, is a favorite walking vehicle for babies, and is a necessity for mothers to take babies to shop on the street.
The shaft part of the existing baby carriage is generally connected by plastic parts, and the traditional technical method is to press the bearing into the bearing hole after the shaft sleeve is injection molded. The bearing adopts the working of plastics easy fracture, and the outside of a small amount of bearings adopts the working of plastics shaping, and inside embedding metal bearing, but the balance performance is relatively poor.
When the existing bearing is matched with a shaft sleeve, the edge of a bearing hole is pressed to deform or the shaft sleeve is bent or even broken due to improper assembly, the assembly is difficult, the labor intensity is increased, and the condition that the length of the bearing is greater than that of the bearing hole can occur, so that the accuracy of a product is not high.
Disclosure of Invention
The present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a balancing apparatus for a stroller.
The purpose of the invention can be realized by the following technical scheme: a balancing device for a stroller, characterized in that the process for manufacturing the balancing device comprises the following steps:
s01: sleeving a bearing copper sleeve outside the mold core;
s02: when the die is closed and die-cast, molten aluminum alloy is poured on the outer side of the bearing copper sleeve through a runner to form the bearing sleeve;
s03: and opening the mold to obtain the balancing device.
The working principle of the invention is as follows: an operator firstly embeds the copper bush on the mold core before die-casting molding, molten aluminum alloy directly pours the bearing copper bush into a whole with the bearing copper bush through the runner during mold closing, and the bearing bush is formed on the outer side of the bearing copper bush.
Preferably, the bearing copper bush is used for the connecting rotating shaft on the two sides of the baby carriage to penetrate through.
Preferably, the bearing sleeve is provided with a fixing surface fixedly connected with the baby carriage, and sliding grooves are arranged on two sides of the bearing sleeve.
Preferably, the molten aluminum alloy comprises the following components in percentage by mass: 0.1 to 0.3 percent of iron, 0.7 to 1.0 percent of magnesium, 0.5 to 0.6 percent of manganese, 4 to 5 percent of silicon, less than 0.02 percent of lead, 0.2 to 0.3 percent of chromium, less than 0.04 percent of copper, and the balance of aluminum and inevitable impurities.
Preferably, in step S02, the die casting parameters are set to 400-500 ℃ of the mold temperature, 50-60MPa of the casting pressure and-0.2-0.3 MPa of the vacuum degree.
Preferably, the bearing copper sleeve is made of copper alloy, and the melting point of the bearing copper sleeve is between 850 ℃ and 900 ℃.
Preferably, the copper alloy comprises the following components in percentage by mass: 0.5 to 0.8 percent of lead, 2.0 to 3.0 percent of lead, 4.0 to 5.0 percent of nickel, 1.0 to 2.0 percent of iron, 0.5 to 0.7 percent of magnesium, 0.7 to 1.0 percent of titanium, 3.5 to 4.0 percent of cobalt, and the balance of copper and inevitable impurities.
Preferably, the balancing device is prepared by a die-casting die, the die-casting die comprises an upper template, a lower template and a die core positioned between the upper template and the lower template, and the upper template, the lower template and the die core are matched to form a cavity.
Preferably, the upper template is provided with a runner for pouring molten aluminum alloy, the middle part of the lower template is provided with a separation column, the middle part of the upper template is provided with a pouring channel, and the separation column is inserted into the pouring channel to form two runners.
Preferably, the die casting mold further comprises a lifter.
Compared with the prior art, the invention has the following advantages:
1. the invention is formed in one step by a die-casting process, so that the fusion performance of the bearing copper sleeve and the bearing sleeve is good, and the precision of the prepared balancing device is high.
2. The melting point of the aluminum alloy is lower than that of the bearing copper sleeve, so that the bearing copper sleeve can not be completely dissolved when the molten aluminum alloy is poured on the outer side of the bearing copper sleeve through a runner, but because the melting point of the bearing copper sleeve is between 850 and 900 ℃, and the molten aluminum alloy is poured on the outer side of the bearing copper sleeve under the pressure of 50-60Mpa and the vacuum degree of-0.2 to-0.3 Mpa, one part of the outermost layer of the bearing copper sleeve is combined with the molten aluminum alloy to form a compact combined layer, so that the fusion performance of the bearing copper sleeve and the bearing sleeve is excellent, the combination is firm, the whole bearing copper sleeve cannot be dissolved by the molten aluminum alloy, and only the outermost layer of the bearing copper sleeve is combined with the molten aluminum alloy.
3. The aluminum alloy comprises, by mass, 0.1-0.3% of iron, 0.7-1.0% of magnesium, 0.5-0.6% of manganese, 4-5% of silicon, less than 0.02% of lead, 0.2-0.3% of chromium, less than 0.04% of copper, and the balance of aluminum and inevitable impurities. The bearing copper sleeve comprises the following components in percentage by mass: 0.5 to 0.8 percent of lead, 2.0 to 3.0 percent of lead, 4.0 to 5.0 percent of nickel, 1.0 to 2.0 percent of iron, 0.5 to 0.7 percent of magnesium, 0.7 to 1.0 percent of titanium, 3.5 to 4.0 percent of cobalt, and the balance of copper and inevitable impurities. The prepared balancing device has high strength and is not easy to break. The tensile strength can averagely reach more than 225MPa, and the yield strength can averagely reach more than 116 MPa.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of the mounting surface of the present invention;
FIG. 3 is one of two connecting shafts according to the present invention;
FIG. 4 is another of the two connecting shafts of the present invention;
FIG. 5 is a schematic view of the construction of the pitched roof of the present invention;
FIG. 6 is a schematic cross-sectional view of a die casting mold of the present invention;
FIG. 7 is a schematic cross-sectional view of the core of the present invention;
FIG. 8 is a schematic process flow diagram of the present invention.
In the figure, 1, a bearing copper sleeve; 2. a mold core; 3. a bearing housing; 4. connecting the rotating shaft; 5. a fixed surface; 6. a chute; 7. mounting a template; 8. a lower template; 10. a cavity; 11. a flow channel; 12. separating the columns; 13. pouring a channel; 14. and (5) obliquely ejecting.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
Example 1
A process for manufacturing a balancing device for a baby carriage, comprising:
adding the aluminum alloy into an electric dissolving furnace, heating to over 800 ℃, stirring and dissolving to obtain molten aluminum alloy. The aluminum alloy comprises, by mass, 0.1-0.3% of iron, 0.7-1.0% of magnesium, 0.5-0.6% of manganese, 4-5% of silicon, less than 0.02% of lead, 0.2-0.3% of chromium, less than 0.04% of copper, and the balance of aluminum and inevitable impurities.
Keeping the temperature of the molten aluminum alloy between 750 ℃ and 780 ℃, carrying out ultrasonic treatment for 1 hour, carrying out defoaming treatment, pouring the molten aluminum alloy on the outer side of a bearing copper sleeve 1 (the bearing copper sleeve 1 is sleeved outside a mold core 2, the inner surface of a cavity 10 is coated with lubricating oil, the temperature of a die-casting mold is 400-500 ℃ and the vacuum degree is-0.2-0.3 MPa) through a runner 11 under the pressure of 50-60Mpa, cooling, opening the mold, demoulding, and deburring and shot blasting to obtain a blank of the balance device.
And then, turning a flange surface, polishing an installation spigot, a bearing chamber, a spigot and a switch surface, drilling, tapping, boring a pin hole, performing final inspection, cleaning, performing full inspection on an outer pipe, boxing, inspecting, packaging and warehousing for storage as shown in fig. 8.
The bearing copper sleeve 1 comprises the following components in percentage by mass: 0.5 to 0.8 percent of lead, 2.0 to 3.0 percent of lead, 4.0 to 5.0 percent of nickel, 1.0 to 2.0 percent of iron, 0.5 to 0.7 percent of magnesium, 0.7 to 1.0 percent of titanium, 3.5 to 4.0 percent of cobalt, and the balance of copper and inevitable impurities. And measuring the melting point of the bearing copper sleeve 1, wherein the melting point is between 850 ℃ and 900 ℃.
The prepared balance devices of experimental groups 1 to 3 were subjected to strength tests, and the results thereof were as follows:
| experimental group | Yield strength | Tensile strength |
| |
116.85Mpa | 225.25 |
| Experimental group | ||
| 2 | 117.01Mpa | 225.33 |
| Experimental group | ||
| 3 | 116.97Mpa | 225.29Mpa |
The prepared balancing device has high strength and is not easy to break. The tensile strength can averagely reach more than 225MPa, and the yield strength can averagely reach more than 116 MPa.
As shown in fig. 1-4, a balancing device for a stroller comprises a bearing sleeve 3 and a bearing copper sleeve 1, wherein the bearing copper sleeve 1 is used for the connection rotating shaft 4 at two sides of the stroller to penetrate. The bearing sleeve 3 is provided with a fixing surface 5 fixedly connected with the baby carriage, and sliding grooves 6 are arranged on two sides of the bearing sleeve 3.
The fixing surface 5 is fixedly connected to the baby carriage, the connecting rotating shaft 4 is inserted into the bearing copper bush 1, the connecting rotating shaft 4 can rotate relative to the bearing copper bush 1, the balance device is often used as a connecting piece of a handrail and a baby carriage body of the baby carriage, and the handrail is convenient to rotate around the baby carriage body, so that the baby carriage is convenient to fold or unfold. The connecting rotating shaft 4 is fixedly connected with the handrail. The chute 6 can limit the amplitude of handrail rotation.
As shown in fig. 5-7, the die casting mold comprises an upper mold plate 7, a lower mold plate 8, and a mold core 2 located between the upper mold plate 7 and the lower mold plate 8, wherein the upper mold plate 7, the lower mold plate 8, and the mold core 2 cooperate to form a mold cavity 10. The upper template 7 is provided with a runner 11 for pouring molten aluminum alloy, the middle part of the lower template 8 is provided with a separation column 12, the middle part of the upper template 7 is provided with a pouring channel 13, and the separation column 12 is inserted into the pouring channel 13 to form two runners 11. The die casting mould further comprises a sloping roof 14.
The injection molding machine injects the defoamed molten aluminum alloy into the cavity 10 through the runner 11 under the pressure of 50-60Mpa, and finally the bearing sleeve 3 is included outside the bearing copper sleeve 1 to form a balancing device.
The invention does not show a vacuum pumping device, a heating device and the like, and as the skilled person should understand, the temperature of the die-casting die is 400-.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Although the terms of the bearing copper bush 1, the mold core 2, the bearing bush 3, the connecting rotating shaft 4, the fixing surface 5, the sliding groove 6, the upper mold plate 7, the lower mold plate 8, the cavity 10, the runner 11, the partition column 12, the pouring channel 13, the slanted roof 14 and the like are used more frequently, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Claims (10)
1. A balancing device for a stroller, characterized in that the process for manufacturing the balancing device comprises the following steps:
s01: sleeving a bearing copper sleeve (1) outside a mold core (2);
s02: when the die is closed and die-cast, molten aluminum alloy is poured on the outer side of the bearing copper sleeve (1) through the runner (11) to form the bearing sleeve (3);
s03: and opening the mold to obtain the balancing device.
2. A balancing device for prams according to claim 1, characterized in that the bearing copper bush (1) is used for the penetration of the connecting shafts (4) on both sides of the pram.
3. A balancing device for prams according to claim 1, characterised in that the bearing bush (3) is provided with a fixing surface (5) for the fixed connection with the pram, and that the bearing bush (3) is provided with sliding grooves (6) on both sides.
4. The balance device for a stroller according to claim 1, wherein the molten aluminum alloy comprises the following components in percentage by mass: 0.1 to 0.3 percent of iron, 0.7 to 1.0 percent of magnesium, 0.5 to 0.6 percent of manganese, 4 to 5 percent of silicon, less than 0.02 percent of lead, 0.2 to 0.3 percent of chromium, less than 0.04 percent of copper, and the balance of aluminum and inevitable impurities.
5. The balancing apparatus for a stroller according to claim 1, wherein the die casting parameters are set to 400 ℃ and 500 ℃, the casting pressure is 50-60Mpa, and the vacuum is-0.2 to-0.3 Mpa in step S02.
6. A balancing device for prams according to claim 1, characterized in that the bearing copper sleeve (1) is made of a copper alloy and has a melting point of between 900 ℃ and 1000 ℃.
7. The balance device for the baby carriage according to claim 1, wherein the copper alloy comprises the following components in percentage by mass: 0.5 to 0.8 percent of lead, 2.0 to 3.0 percent of lead, 4.0 to 5.0 percent of nickel, 1.0 to 2.0 percent of iron, 0.5 to 0.7 percent of magnesium, 0.7 to 1.0 percent of titanium, 3.5 to 4.0 percent of cobalt, and the balance of copper and inevitable impurities.
8. A balancing device for prams according to claim 1, characterized in that the balancing device is prepared by means of a die-casting mould comprising an upper template (7), a lower template (8) and a core (2) between the upper template (7) and the lower template (8), wherein the upper template (7), the lower template (8) and the core (2) cooperate to form a cavity (10).
9. The balancing device for the baby carriage according to claim 8, wherein the upper mold plate (7) is provided with a runner (11) for pouring molten aluminum alloy, the middle of the lower mold plate (8) is provided with a separation column (12), the middle of the upper mold plate (7) is provided with a pouring channel (13), and the separation column (12) is inserted into the pouring channel (13) to form two runners (11).
10. A balancing device for prams according to claim 8, characterized in that the die-casting mould further comprises a sloping roof (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010070611.9A CN111230074B (en) | 2020-01-21 | 2020-01-21 | Preparation process of balancing device for baby carriage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010070611.9A CN111230074B (en) | 2020-01-21 | 2020-01-21 | Preparation process of balancing device for baby carriage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111230074A true CN111230074A (en) | 2020-06-05 |
| CN111230074B CN111230074B (en) | 2021-09-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010070611.9A Active CN111230074B (en) | 2020-01-21 | 2020-01-21 | Preparation process of balancing device for baby carriage |
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| CN (1) | CN111230074B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3762009A (en) * | 1970-07-03 | 1973-10-02 | H Teramachi | Method of producing spline bearings |
| CN201144964Y (en) * | 2007-12-30 | 2008-11-05 | 齐兴山 | Copper core composite material axle sleeve |
| DE102008058157A1 (en) * | 2008-11-20 | 2010-06-02 | Bosch Mahle Turbo Systems Gmbh & Co. Kg | Bearing bush for hydrodynamic journal bearings for supporting rotor in stator, particularly exhaust gas turbocharger, has radially inner bearing surface, which has porous upper surface structure or forms porous upper surface structure |
| CN102676887A (en) * | 2012-06-11 | 2012-09-19 | 东莞市闻誉实业有限公司 | Aluminum alloy for compression casting and casting of aluminum alloy |
| CN108237213A (en) * | 2017-12-29 | 2018-07-03 | 上海天阳钢管有限公司 | A kind of process for manufacturing bimetallic composite bearing blank |
| JP2018105340A (en) * | 2016-12-22 | 2018-07-05 | 株式会社荏原製作所 | Shaft sleeve and pump |
| CN108546852A (en) * | 2018-06-15 | 2018-09-18 | 南通富尔特金属制品有限公司 | A kind of compression casting aluminium alloy |
| CN110681847A (en) * | 2019-10-29 | 2020-01-14 | 中国兵器工业第五九研究所 | Preparation method of thin-wall conical component made of aluminum-copper composite material |
-
2020
- 2020-01-21 CN CN202010070611.9A patent/CN111230074B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3762009A (en) * | 1970-07-03 | 1973-10-02 | H Teramachi | Method of producing spline bearings |
| CN201144964Y (en) * | 2007-12-30 | 2008-11-05 | 齐兴山 | Copper core composite material axle sleeve |
| DE102008058157A1 (en) * | 2008-11-20 | 2010-06-02 | Bosch Mahle Turbo Systems Gmbh & Co. Kg | Bearing bush for hydrodynamic journal bearings for supporting rotor in stator, particularly exhaust gas turbocharger, has radially inner bearing surface, which has porous upper surface structure or forms porous upper surface structure |
| CN102676887A (en) * | 2012-06-11 | 2012-09-19 | 东莞市闻誉实业有限公司 | Aluminum alloy for compression casting and casting of aluminum alloy |
| JP2018105340A (en) * | 2016-12-22 | 2018-07-05 | 株式会社荏原製作所 | Shaft sleeve and pump |
| CN108237213A (en) * | 2017-12-29 | 2018-07-03 | 上海天阳钢管有限公司 | A kind of process for manufacturing bimetallic composite bearing blank |
| CN108546852A (en) * | 2018-06-15 | 2018-09-18 | 南通富尔特金属制品有限公司 | A kind of compression casting aluminium alloy |
| CN110681847A (en) * | 2019-10-29 | 2020-01-14 | 中国兵器工业第五九研究所 | Preparation method of thin-wall conical component made of aluminum-copper composite material |
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| Publication number | Publication date |
|---|---|
| CN111230074B (en) | 2021-09-10 |
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