CN111022541A - High-stress few-leaf front spring for tractor - Google Patents
High-stress few-leaf front spring for tractor Download PDFInfo
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- CN111022541A CN111022541A CN201911388481.7A CN201911388481A CN111022541A CN 111022541 A CN111022541 A CN 111022541A CN 201911388481 A CN201911388481 A CN 201911388481A CN 111022541 A CN111022541 A CN 111022541A
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- spring
- reed
- leaf
- few
- end cover
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F3/00—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic
- F16F3/02—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of steel or of other material having low internal friction
- F16F3/023—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of steel or of other material having low internal friction composed only of leaf springs
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Articles (AREA)
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Abstract
A high stress few-leaf front spring for a tractor belongs to the field of the manufacture of springs of automobiles and locomotives. The method is characterized in that: the leaf spring comprises a leaf spring body, wherein the leaf spring body comprises a first reed and a second reed, and two ends of the first reed and the second reed are respectively connected with an O-shaped hanging lug. On two upper and lower shock attenuation stress surfaces of leaf spring, regard damping spring as first bearing unit, and few preceding spring as absorbing central main part, the hangers that set up through few preceding spring both ends unloads power, accomplish whole shock attenuation process, this in-process, because damping spring and few preceding contact surface between the spring is little, so can not take place multi-disc leaf spring when receiving the impact, appear because the dynamic rigidity grow of spring that friction leads to between the multi-disc leaf spring and along with the vibration velocity increase and influence the performance variation that leaf spring absorbed the impact force. The product combines the good performance of the two forms of damping springs.
Description
Technical Field
The invention belongs to the field of automobile spring manufacturing, and particularly relates to a high-stress few-leaf front spring for a tractor.
Background
The few leaf springs are two common shock absorption springs of the current freight vehicles, and compared with the prior art in terms of performance, the multiple leaf springs are superior to the few leaf springs in terms of pressure bearing degree, the less leaf springs are superior to the prior leaf springs in terms of vehicle running smoothness, and the less leaf springs are brand-new designed by the inventor for better combining the superiority of the two leaf springs and are applied to the front shock absorption of the tractor.
Disclosure of Invention
The invention aims to solve the technical problem of providing a high-stress few-leaf front spring for a traction vehicle, which increases the buffering effect of the few-leaf front spring under heavy pressure on the premise of ensuring the smoothness of the few-leaf front spring when the few-leaf front spring is applied to normal driving.
In order to solve the technical problems, the technical scheme of the invention is as follows: the invention discloses a high-stress few-leaf front spring for a tractor, which is characterized in that: the spring comprises a plate spring body, wherein the plate spring body comprises a first spring leaf and a second spring leaf, and two ends of the first spring leaf and the second spring leaf are respectively connected with an O-shaped hanging lug; the spring mounting structure is characterized in that a through hole is formed in the middle of the first reed and the second reed, an upper spring and an upper end cover are arranged above the through hole, a lower spring and a lower end cover are arranged below the through hole, an upper threaded hole and a lower threaded hole are formed in the upper end cover and the lower end cover, a mounting bolt penetrates through the upper end cover, the upper spring, the first reed, the second reed, the lower spring and the lower end cover and is arranged at two ends of the mounting bolt, upper end external threads and lower end external threads are respectively arranged at two ends of the mounting bolt, the mounting bolt is mounted in an upper threaded hole of the upper end cover through the upper end external threads, and the mounting bolt is mounted in.
Preferably, set up left side middle reed and right side middle reed between first reed and second reed, left side middle reed and right side middle reed all are "︶" shape that both ends upwarp, and the middle part of left side middle reed and right side middle reed is fixed on the up end of second reed through left pin and right pin respectively.
Preferably, the thickness of the second spring is 1.5-2 times the thickness of the first spring.
Preferably, the opposite surfaces of the first reed and the second reed and the middle reeds on the left side and the right side are locally heat-treated by laser or induction; the laser or induction local heat treatment comprises the following steps: the upper spring plate and the lower spring plate are both made of 50CrVA spring steel; locally heating the left pressing bag, the left pressing groove, the right pressing bag, the right pressing groove and the inner convex point to 860-880 ℃ by using a laser or induction heating method, performing oil cooling quenching, and completing quenching through a steam film stage, a boiling stage and a convection stage; the steam film bursting time is 3-5 seconds.
Preferably, the quenching hardness of the 50CrVA spring steel is not less than 56HRC, and the martensite structure percentage is not less than 85%.
Compared with the prior art, the invention has the beneficial effects that:
1. the high-stress few-leaf front spring is characterized in that a damping spring is fused into the few-leaf front spring, the damping spring is used as a first bearing unit on the upper damping stress surface and the lower damping stress surface of a steel plate spring, the few-leaf front spring is used as a damping central main body, and force is removed through lugs arranged at two ends of the few-leaf front spring, so that the whole damping process is completed. The product is low in modification cost and good in using effect, and the damping springs in two forms are fused with good performance.
2. The device still can promote the shock attenuation effect of spring before the few-leaf through adding the middle reed of establishing different curvatures between the spring before the few-leaf, simultaneously this design also effectually avoided because between each damper, because predetermine the contact surface too big, just can appear when the impact force is slightly big increasing because of frictional force, and the technical problem who brings the above-mentioned influence form smoothness that describes.
3. In the invention, the opposite surfaces of the first reed and the second reed and the middle reeds on the left side and the right side are subjected to laser or induction local heat treatment, because the parts are easy to move and rub when a vehicle bumps or loads and unloads, the parts are subjected to quenching treatment to improve the hardness and the wear-resisting strength; the local heat treatment is carried out on the position, so that the internal stress of each part of the first upper spring leaf and the second upper spring leaf can be further increased, and the integral use strength, the wear resistance and the fatigue resistance of the plate spring are enhanced. The step is used for carrying out special treatment on the local part of the material, and the influence of various conditions on the product in the use state is comprehensively considered.
Drawings
FIG. 1 is a schematic structural diagram of a first embodiment of the present invention;
FIG. 2 is a schematic structural view of the upper end cap;
FIG. 3 is a schematic view of the mounting positions of the left middle spring leaf and the right middle spring leaf between the first spring leaf and the second spring leaf;
the labels in the figure are: 1. an O-shaped suspension loop; 2. a first reed; 3. a second reed; 4. an upper end cover; 5. an upper spring; 6. installing a bolt; 7. a through hole; 8. a lower spring; 9. a lower end cover; 10. an upper threaded hole; 11. a left middle reed; 12. a left pin; 13. a right pin; 14. the middle reed on the right side.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Example one
As shown in fig. 1, the high-stress few-leaf front spring for the tractor comprises a plate spring body, wherein the plate spring body comprises a first spring leaf and a second spring leaf, and two ends of the first spring leaf and the second spring leaf are respectively connected with an O-shaped hanging lug; and through holes are formed in the middle parts of the first reed and the second reed. An upper spring and an upper end cover are arranged above the through hole, and a lower spring and a lower end cover are arranged below the through hole. As shown in fig. 2, the upper end cap is provided with an upper threaded hole, and the lower end cap is provided with a lower threaded hole. The upper end cover, the upper spring, the first reed, the second reed, the lower spring and the lower end cover are penetrated by mounting bolts, upper end external threads and lower end external threads are arranged at two ends of the mounting bolts respectively, the mounting bolts are mounted in upper threaded holes of the upper end cover through the upper end external threads, and the mounting bolts are mounted in lower threaded holes of the lower end cover through the lower end external threads.
The thickness of the second reed is 1.5-2 times of that of the first reed.
Carrying out laser or induction local heat treatment on the opposite surfaces of the first reed and the second reed; the laser or induction local heat treatment comprises the following steps: the upper spring plate and the lower spring plate are both made of 50CrVA spring steel; locally heating the left pressing bag, the left pressing groove, the right pressing bag, the right pressing groove and the inner convex point to 860-880 ℃ by using a laser or induction heating method, performing oil cooling quenching, and completing quenching through a steam film stage, a boiling stage and a convection stage; the steam film bursting time is 3-5 seconds.
The quenching hardness of the 50CrVA spring steel is not less than 56HRC, and the martensite structure percentage is not less than 85%.
Carrying out laser or induction local heat treatment on the opposite surfaces of the first reed and the second reed, wherein the parts are easy to move and rub when a vehicle jolts or is loaded or unloaded, so that the parts are quenched to improve the hardness and the wear-resisting strength; the local heat treatment is carried out on the position, so that the internal stress of each part of the first upper spring leaf and the second upper spring leaf can be further increased, and the integral use strength, the wear resistance and the fatigue resistance of the plate spring are enhanced.
When the device runs in normal running of a vehicle and is subjected to normal bearing, gravity is transmitted to the first reed and the second reed through the O-shaped suspension loops and is used as a normal use state of a product, when bumping impact is met, the first reed and the second reed deform and displace up and down simultaneously, and at the moment, the upper end cover and the lower end cover of the upper spring and the lower spring are used as base points to generate relative supporting force to the first reed and the second reed.
Example two
As shown in fig. 3, in this embodiment, a left middle spring leaf and a right middle spring leaf are arranged between the first spring leaf and the second spring leaf, the left middle spring leaf and the right middle spring leaf are both in the shape of "︶" with two upturned ends, and the middle parts of the left middle spring leaf and the right middle spring leaf are fixed on the upper end surface of the second spring leaf through a left pin and a right pin respectively.
The device is in the use, when the product receives the impact of jolting, at first, bear the impact force by first reed and second reed, left side middle reed and right side middle reed receive the impact back at first reed and second reed, accomplished simultaneously can conduct basic strength, nevertheless because the molding and the contact surface of left side middle reed and right side middle reed, make the vehicle can not be like the full face-to-face contact between the reed of traditional product when the shock attenuation of jolting, and it is big to cause the noise, the condition that dynamic stiffness grow and vibration speed increase appears, after avoidng above-mentioned technical problem, make the vehicle more steady that traveles.
Carrying out laser or induction local heat treatment on the opposite surfaces of the first reed and the second reed and the left middle reed and the right middle reed; the laser or induction local heat treatment comprises the following steps: the upper spring plate and the lower spring plate are both made of 50CrVA spring steel; locally heating the left pressing bag, the left pressing groove, the right pressing bag, the right pressing groove and the inner convex point to 860-880 ℃ by using a laser or induction heating method, performing oil cooling quenching, and completing quenching through a steam film stage, a boiling stage and a convection stage; the steam film bursting time is 3-5 seconds.
The quenching hardness of the 50CrVA spring steel is not less than 56HRC, and the martensite structure percentage is not less than 85%.
The opposite surfaces of the first reed and the second reed and the middle reeds on the left side and the right side are subjected to laser or induction local heat treatment, and the parts are easy to move and rub when a vehicle jolts or is loaded or unloaded, so that the parts are subjected to quenching treatment to improve the hardness and the wear-resisting strength; the local heat treatment is carried out on the position, so that the internal stress of each part of the first upper spring leaf and the second upper spring leaf can be further increased, and the integral use strength, the wear resistance and the fatigue resistance of the plate spring are enhanced.
The rest of the structure and the using mode of the embodiment are the same as those of the first embodiment, and are not described again.
The above description is only for the preferred embodiment of the present invention, and not intended to limit the present invention in any way, and any person skilled in the art may make any combination, change or modification of the above-described embodiments using the technical content disclosed in the above description. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.
Claims (5)
1. The utility model provides a few leaf front springs of high stress for tractor which characterized in that: the spring comprises a plate spring body, wherein the plate spring body comprises a first spring leaf and a second spring leaf, and two ends of the first spring leaf and the second spring leaf are respectively connected with an O-shaped hanging lug; the spring mounting structure is characterized in that a through hole is formed in the middle of the first reed and the second reed, an upper spring and an upper end cover are arranged above the through hole, a lower spring and a lower end cover are arranged below the through hole, an upper threaded hole and a lower threaded hole are formed in the upper end cover and the lower end cover, a mounting bolt penetrates through the upper end cover, the upper spring, the first reed, the second reed, the lower spring and the lower end cover and is arranged at two ends of the mounting bolt, upper end external threads and lower end external threads are respectively arranged at two ends of the mounting bolt, the mounting bolt is mounted in an upper threaded hole of the upper end cover through the upper end external threads, and the mounting bolt is mounted in.
2. The high-stress few-leaf front spring for a towing vehicle according to claim 1, wherein: set up left side middle reed and right side middle reed between first reed and second reed, left side middle reed and right side middle reed all are the "︶" shape that both ends upwarp, and the middle part of left side middle reed and right side middle reed is fixed on the up end of second reed through left pin and right pin respectively.
3. The high-stress few-leaf front spring for a towing vehicle according to claim 2, wherein: the thickness of the second reed is 1.5-2 times of that of the first reed.
4. A highly stressed flakeless front spring for a towing vehicle as defined in claim 3, wherein: carrying out laser or induction local heat treatment on the opposite surfaces of the first reed and the second reed and the left middle reed and the right middle reed; the laser or induction local heat treatment comprises the following steps: the upper spring plate and the lower spring plate are both made of 50CrVA spring steel; locally heating the left pressing bag, the left pressing groove, the right pressing bag, the right pressing groove and the inner convex point to 860-880 ℃ by using a laser or induction heating method, performing oil cooling quenching, and completing quenching through a steam film stage, a boiling stage and a convection stage; the steam film bursting time is 3-5 seconds.
5. The high-stress few-leaf front spring for the towing vehicle according to claim 4, wherein: the quenching hardness of the 50CrVA spring steel is not less than 56HRC, and the martensite structure percentage is not less than 85%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911388481.7A CN111022541A (en) | 2019-12-30 | 2019-12-30 | High-stress few-leaf front spring for tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911388481.7A CN111022541A (en) | 2019-12-30 | 2019-12-30 | High-stress few-leaf front spring for tractor |
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| Publication Number | Publication Date |
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| CN111022541A true CN111022541A (en) | 2020-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911388481.7A Pending CN111022541A (en) | 2019-12-30 | 2019-12-30 | High-stress few-leaf front spring for tractor |
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| CN (1) | CN111022541A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112664598A (en) * | 2020-11-27 | 2021-04-16 | 江苏擎弓科技股份有限公司 | Composite material plate spring and processing method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2466833A (en) * | 1946-09-23 | 1949-04-12 | Sr John M Allen | Equalizer spring equipment for automotive vehicles |
| CN101829882A (en) * | 2010-01-11 | 2010-09-15 | 安徽安簧机械股份有限公司 | Manufacture method of variable cross-section reed with high strength of more than 1800 MPa |
| CN103014533A (en) * | 2011-10-19 | 2013-04-03 | 宝钢集团新疆八一钢铁有限公司 | Technique for prolonging fatigue life of 50CrVA plate spring |
| CN104165203A (en) * | 2013-05-20 | 2014-11-26 | 北汽福田汽车股份有限公司 | Steel plate spring assembly and vehicle |
| CN203962811U (en) * | 2014-07-30 | 2014-11-26 | 山东雷帕得汽车技术股份有限公司 | A kind of have bear variable cross section few-leaf-spring heavily stressed, the long-life |
| CN205970698U (en) * | 2016-08-18 | 2017-02-22 | 安徽泗州拖拉机制造有限公司 | Shock -proof type high -horsepower tractor |
| CN107244204A (en) * | 2017-06-30 | 2017-10-13 | 安徽江淮汽车集团股份有限公司 | A kind of mounting structure of leaf spring and back axle |
-
2019
- 2019-12-30 CN CN201911388481.7A patent/CN111022541A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2466833A (en) * | 1946-09-23 | 1949-04-12 | Sr John M Allen | Equalizer spring equipment for automotive vehicles |
| CN101829882A (en) * | 2010-01-11 | 2010-09-15 | 安徽安簧机械股份有限公司 | Manufacture method of variable cross-section reed with high strength of more than 1800 MPa |
| CN103014533A (en) * | 2011-10-19 | 2013-04-03 | 宝钢集团新疆八一钢铁有限公司 | Technique for prolonging fatigue life of 50CrVA plate spring |
| CN104165203A (en) * | 2013-05-20 | 2014-11-26 | 北汽福田汽车股份有限公司 | Steel plate spring assembly and vehicle |
| CN203962811U (en) * | 2014-07-30 | 2014-11-26 | 山东雷帕得汽车技术股份有限公司 | A kind of have bear variable cross section few-leaf-spring heavily stressed, the long-life |
| CN205970698U (en) * | 2016-08-18 | 2017-02-22 | 安徽泗州拖拉机制造有限公司 | Shock -proof type high -horsepower tractor |
| CN107244204A (en) * | 2017-06-30 | 2017-10-13 | 安徽江淮汽车集团股份有限公司 | A kind of mounting structure of leaf spring and back axle |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112664598A (en) * | 2020-11-27 | 2021-04-16 | 江苏擎弓科技股份有限公司 | Composite material plate spring and processing method thereof |
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