CN101700733B - Balance shaft assembly - Google Patents
Balance shaft assembly Download PDFInfo
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- CN101700733B CN101700733B CN2009102378964A CN200910237896A CN101700733B CN 101700733 B CN101700733 B CN 101700733B CN 2009102378964 A CN2009102378964 A CN 2009102378964A CN 200910237896 A CN200910237896 A CN 200910237896A CN 101700733 B CN101700733 B CN 101700733B
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- balance shaft
- shaft assembly
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Abstract
The invention provides a balance shaft assembly which comprises a balance shaft, a balance bracket and a balance shaft shell. The balance shaft is arranged in the central hole of the balance shaft bracket. The balance shaft assembly also comprises a connecting bearing the inner ring of which is fixed on the balance shaft and the outer ring of which is fixed on the balance shaft shell, so that the balance shaft and the balance shaft shell are connected together. The balance shaft assembly also comprises a lock nut which is provided with an open groove and a locking screw hole; stepped threads are arranged at the end part of the balance shaft and is positioned outside the inner ring of the connecting bearing; the lock nut is tightly fixed on the balance shaft through the stepped threads; and a locking screw passes through the locking screw hole to fix the lock nut on the balance shaft. By the embodiment of the invention, the bearing is fixed tightly on the balance shaft, and the inner ring of the bearing can not do series movement in axial direction, therefore, the balance shaft can be prevented from being loosened, fractured and broken and the service life of the bearing can be prolonged.
Description
Technical field
The embodiment of the invention relates to the automobile balance suspension system, relates in particular to the balance shaft assembly in a kind of automobile back balance suspension system.
Background technology
At present, two back axle rear overhang frame system overwhelming majority adopt the balance suspension structure, and balance shaft assembly is the critical component in this balance suspension structure.Wherein, balance shaft assembly mainly comprises integral type and split type two kinds, on the domestic heavy card market, heavy motor vehicle is because load carrying ability is big, through the relatively poor sitework of the road conditions of being everlasting, balance shaft load wherein is bigger, the reliability of balance shaft assembly and service life seem particularly important for heavy motor vehicle, therefore, block heavily on the market that a large amount of what adopt is the integral type balance shaft assembly, its mounting structure is mainly, balance shaft connects and is arranged in the centre hole of balance shaft support, and couple together by balance shaft housing and the balance shaft that bearing cone and outer ring will be positioned at the balance shaft end in the end of balance shaft, balance shaft is fixedly connected on the vehicle frame by the balance shaft support, adopts the mode of monolateral two saddle clamps that balance shaft assembly is captiveed joint with steel spring again.
In realizing process of the present invention, the contriver finds that there is following technological deficiency at least in the balance shaft assembly of prior art:
Balance shaft bearing at end in the above-mentioned balance shaft assembly, axial motion takes place in its inner ring easily on balance shaft, thereby cause faults such as fracture of balance shaft bearing at end briquetting bolt looseness and bearing fragmentation easily, make that the reliability and the service life of this balance shaft assembly are all lower, cause that the user complains, cause the wasting of resources for simultaneously country and auto vendor.
Summary of the invention
The embodiment of the invention provides a kind of balance shaft assembly, realizes that the balance shaft bearing at end is fastened on the balance shaft, prevents the axial motion of its inner ring on balance shaft, thereby makes balance shaft bearing be difficult for loosening fracture and broken, and increase service life.
The embodiment of the invention provides a kind of balance shaft assembly, comprises balance shaft, balance shaft support and balance shaft housing, and described balance shaft is arranged in the centre hole of described balance shaft support; Also comprise connection bearing, the inner ring of described connection bearing is fixed on the described balance shaft, and the outer ring of described connection bearing is fixed on the described balance shaft housing, and described balance shaft and balance shaft housing are linked together, also comprise black nut, described black nut is provided with open slot and locking screw; In the end of described balance shaft and the arranged outside that is positioned at the connection bearing inner ring step screw thread is arranged, on described balance shaft, a lock bolt is fastened on described black nut on the described balance shaft by described locking screw described black nut by described step screw threads for fastening.
On this basis, the centre hole both sides of described balance shaft housing are provided with four groups of saddle clamp holes, and each side is provided with two groups respectively, and described saddle clamp hole is arranged for push up at the bottom of the shell oblique Eight characters formula from shell.Balance shaft cap in the described balance shaft assembly is a steel stamping part.The junction of described balance shaft and balance shaft housing also is provided with two-lip seal, and filling has molybdenum disulphide between the lips of described two-lip seal.In the inside of described balance shaft support, be vertically arranged with reinforced rib from the top of described balance shaft support to the sidewall bottom.The top surface of described balance shaft support is provided with groove shape structure.The material of described balance shaft support can be spheroidal graphite iron.Also comprise and be used for fixing the integral type connecting panel that is connected described balance shaft top, described balance shaft support is provided with the support fixed orifice that is used to connect to ground, and described integral type connecting panel is provided with and is used for the corresponding connecting panel fixed orifice of described support fixed orifice.
The embodiment of the invention is by setting up the step screw thread in the balance shaft end, and the corresponding black nut that band open slot and locking screw are set on this step screw thread, adopt lock bolt by the locking of the locking screw on this black nut balance shaft, the problem of axial motion easily takes place in the inner ring that has solved the balance shaft end bearing on balance shaft, make bearing be fastened on the balance shaft, axial motion can not take place in bearing inner ring on balance shaft, thereby avoided the loosening fracture of balance shaft bearing and broken, increase the service life of bearing.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do one to the accompanying drawing of required use in embodiment or the description of the Prior Art below introduces simply, apparently, accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the integral structure scheme drawing of balance shaft assembly embodiment of the present invention;
Fig. 2 is the front view of the black nut embodiment among Fig. 1;
Fig. 3 is the birds-eye view of the black nut embodiment among Fig. 1;
Fig. 4 is the lateral plan of the black nut embodiment among Fig. 1;
Fig. 5 is the front view of the balance shaft housing embodiment among Fig. 1;
Fig. 6 is the birds-eye view of the balance shaft housing embodiment among Fig. 1;
Fig. 7 is the balance shaft housing among Fig. 1 and the coupled condition scheme drawing of saddle clamp;
Fig. 8 is the structural representation of the two-lip seal among Fig. 1;
Fig. 9 is the front view of the balance shaft support among Fig. 1;
Figure 10 is the birds-eye view of the balance shaft support among Fig. 1;
Figure 11 is the lateral plan of the balance shaft support among Fig. 1;
Figure 12 is the front view of the integral type connecting panel among Fig. 1;
Figure 13 is the birds-eye view of the integral type connecting panel among Fig. 1;
Figure 14 is the lateral plan of the integral type connecting panel among Fig. 1;
Figure 15 carries out the assembled construction scheme drawing for balance shaft assembly of the present invention and vehicle frame.
The specific embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer, below in conjunction with the accompanying drawing in the embodiment of the invention, technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Fig. 1 is the integral structure scheme drawing of balance shaft assembly embodiment of the present invention, and as shown in Figure 1, the balance shaft assembly of present embodiment is that example describes with the integral type balance shaft assembly, and it can comprise balance shaft 11, balance shaft support 12 and balance shaft housing 13.Wherein, balance shaft 11 is an entity tubing, and its perforation is arranged in the centre hole of balance shaft support 12, and and balance bracing strut 12 be free-running fit, fix by locating dowel pin between balance shaft 11 and the balance bracing strut 12, can prevent that balance shaft 11 from rotating in balance shaft support 12.Be provided with balance shaft housing 13 in the end of balance shaft 11, balance shaft 11 and balance shaft housing 13 are connected by connection bearing, can adopt angular contact articulated bearing to connect balance shaft 11 and balance shaft housing 13 in the present embodiment; Concrete, the inner ring 15 of angular contact articulated bearing is fixed on the balance shaft 11 by interference fit, and the outer ring 16 of angular contact articulated bearing is fixed on the balance shaft housing 13 by interference fit.In addition, the end of balance shaft housing 13 can also be provided with balance shaft cap 14, and this balance shaft cap 14 can be fixed on the balance shaft housing 13 by some screws.
The key distinction of present embodiment and balance shaft assembly of the prior art is, in the end of balance shaft 11, and in the outside of the inner ring 15 that is positioned at angular contact articulated bearing the step screw thread arranged, black nut 17 by this step screw threads for fastening on balance shaft 11.The concrete structure of this black nut 17 can be referring to Fig. 2～Fig. 4, Fig. 2 is the front view of the black nut embodiment among Fig. 1, Fig. 3 is the birds-eye view of the black nut embodiment among Fig. 1, Fig. 4 is the lateral plan of the black nut embodiment among Fig. 1, as can be seen from Figure, can be provided with open slot 18 and locking screw 19 on this black nut 17, wherein, locking screw 19 runs through described open slot 18.One lock bolt 20 connects two parts locking that open slot 18 is separated by locking screw 19, thereby black nut 17 is fastened on the balance shaft 11, prevents that this black nut 17 is loosening.Since in the arranged outside of the inner ring 15 of angular contact articulated bearing this black nut 17, and lock bolt 20 is fastened on this black nut 17 on the balance shaft 11, the inner ring 15 that can stop angular contact articulated bearing effectively axial motion on the balance shaft 11, thus bearing can be avoided because the moving problem such as frangible that causes of inner ring string.Prove by practical experience, after balance shaft assembly adopts the structure of present embodiment, the problems such as fragmentation that cause to transmission owing to bearing axle do not occur, thousand fault rates of automobile drop to 0 from original 20%, have improved the reliability and the service life of balance shaft assembly greatly.
On this basis, the balance shaft assembly of present embodiment has also carried out some other improvement, below describes respectively.
Further, Fig. 5 is the front view of the balance shaft housing embodiment among Fig. 1, Fig. 6 is the birds-eye view of the balance shaft housing embodiment among Fig. 1, as shown in Figure 5 and Figure 6, in the present embodiment, on the centre hole side walls of balance shaft housing 13, be provided with four groups of saddle clamp holes 21 from the perforation of its top to bottom, each side is provided with two groups, and this saddle clamp hole 21 is oblique Eight characters setting from the top to the bottom.During assembling, as shown in Figure 7, Fig. 7 is the balance shaft housing among Fig. 1 and the coupled condition scheme drawing of saddle clamp, the top of balance shaft housing 13 is provided with Multi-Leaf Springs 22, be positioned at steel spring 22 tops and also be provided with the leaf spring pressing plate, saddle clamp 23 is connected and fixed balance shaft housing 13, steel spring 22 and leaf spring pressing plate by four groups of saddle clamp holes 21, and undertaken fasteningly by self lock nut 24 in the outer end of saddle clamp 23, the self lock nut in the present embodiment can adopt the flange face self lock nut.The oblique Eight characters of above-mentioned saddle clamp is provided with structure can reach the effect of saving the car load arrangement space and reducing steel spring stress, can increase the effective length of steel spring, and the monolateral balance shaft housing in the present embodiment adopts the structure of four saddle clamps to adopt the structure of two saddle clamps with respect to present monolateral balance shaft housing, can reduce the tensile axis power of saddle clamp, thereby reduce the loosening breakage problem of saddle clamp.
Further, the balance shaft cap 14 of present embodiment is a steel stamping part, the balance shaft cap of this steel stamping part is with respect to the balance shaft cap of common cast structure, hardness and impact resistance have been improved, can avoid that the balance shaft cap that causes breaks and leakage of oil because transportation transhipment is collided with, and the balance shaft cap of common cast structure may cause leakage of oil owing to foundry goods sand holes, pore, now adopts the balance shaft cap of steel stamping part just can avoid this problem.Balance shaft 11 in the present embodiment also is provided with two-lip seal 25, this two-lip seal 25 can be arranged on the junction of balance shaft 11 and balance shaft housing 13, can be in a side of balance shaft support 12, and the outer ring 16 of adjacent angular contact articulated bearing is provided with, as shown in Figure 8, Fig. 8 is the structural representation of the two-lip seal among Fig. 1, in addition, also filling has molybdenum disulphide between the lips of this two-lip seal 25, this molybdenum disulphide is a kind of grease, it can cling dust and other impurities, makes dust not enter into lubricating oil system; In addition, the lips of two-lip seal 25 structure that adds molybdenum disulphide can significantly reduce the leakage problem of fluid so that the leakproof of fluid has become three layers of leakproof by original single lip seal one deck leakproof.
Further, on above-mentioned improvement balance shaft and the isostructural basis of balance shaft housing, present embodiment also improves the balance shaft support.Fig. 9 is the front view of the balance shaft support among Fig. 1, Figure 10 is the birds-eye view of the balance shaft support among Fig. 1, Figure 11 is the lateral plan of the balance shaft support among Fig. 1, as Fig. 9～shown in Figure 11, present embodiment is on the basis of present balance shaft support, in the inside of balance shaft support 12, be vertically arranged with reinforced rib 26 from the top of balance shaft support to its sidewall bottom; Can also be further, at the top surface of balance shaft support groove shape structure is set, for example, the top surface at the balance shaft support in the present embodiment is provided with circular groove 27.Setting through above-mentioned reinforced rib and groove shape structure, can optimize the stress distribution that the balance shaft support is born, and the material of balance shaft support 12 can be upgraded to QT500-10 by common QT (spheroidal graphite iron) 450-10, strengthen the surrender and the strength limit of material, can satisfy the use of all kinds of operating modes of present domestic heavy motor vehicle.
In addition, the balance shaft assembly of present embodiment also comprises an integral type connecting panel 28, the structure of this integral type connecting panel 28 is shown in Figure 12～14, Figure 12 is the front view of the integral type connecting panel among Fig. 1, Figure 13 is the birds-eye view of the integral type connecting panel among Fig. 1, Figure 14 is the lateral plan of the integral type connecting panel among Fig. 1, the integral type connecting panel 28 of present embodiment is used for fixing the top that is connected balance shaft 11, for cooperating assembling, this integral type connecting panel 28 be provided with balance shaft support 12 on the connecting panel fixed orifice 29 that is complementary of support fixed orifice, integral type connecting panel 28, balance shaft support 12 can be captiveed joint with vehicle frame with connecting panel fixed orifice 29 together by above-mentioned support fixed orifice, in concrete the enforcement, can utilize bolt that balance shaft support 12 and integral type connecting panel 28 are fixed on the vehicle frame, the material of this integral type connecting panel can be cast steel.With respect to balance shaft assembly of the prior art, by between balance shaft support and vehicle frame, setting up the enough integral type connecting panels of an intensity, can increase the torsion stiffness of vehicle frame and balance shaft, reduce the deformation of balance shaft support and balance shaft, thereby reach the breakage problem that solves balance shaft and balance shaft support, and can reach the effect that reduces the vehicle frame damage simultaneously.
The balance shaft assembly assembly drowing of present embodiment as shown in figure 15, Figure 15 carries out the assembled construction scheme drawing for balance shaft assembly of the present invention and vehicle frame, the balance shaft assembly of present embodiment is when assembling, roughly can for, at first balance shaft 11 and balance shaft support 12 are assembled, the centre hole that balance shaft 11 is pressed into balance shaft support 12 is free-running fit to given size between balance shaft 11 and the balance bracing strut 12, again both are fixed through locating dowel pin, prevent that balance shaft 11 from rotating.Balance shaft housing 13 and balance shaft housing lid 14 is fixed on the end of balance shaft 11, the inner ring of angular contact articulated bearing is fixed on the balance shaft 11 by interference fit, the outer ring of angular contact articulated bearing is fixed on the balance shaft housing 13 by interference fit, balance shaft housing 13 is fixed on the balance shaft 11 again.The balance shaft of then assembling being finished 11 that comprises is connected with vehicle frame with the balance shaft assembly of balance bracing strut 12 grades, above balance shaft assembly, place Multi-Leaf Springs, utilize bolt that balance shaft support 12 and integral type connecting panel 28 are fixed on the frame assembly 30, frame assembly 30 comprises cross member of frame and chassis side rail, link together from the below with balance shaft assembly and steel spring, the leaf spring pressing plate that is positioned at steel spring top with saddle clamp, and urgent getting final product.
Present embodiment is to be that example describes with the integral type balance shaft assembly, structure wherein is not limited to the integral type balance shaft assembly, also can be applied in the split type balance shaft assembly, for example, integral type connecting panel, two-lip seal, locking big nut, tiltedly Eight characters bolt arrangement etc. all can be used in addition at split type balance shaft assembly, its concrete application can reference in its entirety formula balance shaft assembly embodiment, does not repeat them here.
Present embodiment is by setting up the step screw thread in the balance shaft end, and the corresponding black nut that band open slot and locking screw are set on this step screw thread, adopt lock bolt by the locking of the locking screw on this black nut balance shaft, the problem of axial motion easily takes place in the inner ring that has solved the balance shaft end bearing on balance shaft, make bearing be fastened on the balance shaft, axial motion can not take place in bearing inner ring on balance shaft, thereby avoided the loosening fracture of balance shaft bearing and broken, increase the service life of bearing.
It should be noted that at last: above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (9)
1. a balance shaft assembly comprises balance shaft, balance shaft support and balance shaft housing, and described balance shaft is arranged in the centre hole of described balance shaft support; Also comprise connection bearing, the inner ring of described connection bearing is fixed on the described balance shaft, and the outer ring of described connection bearing is fixed on the described balance shaft housing, and described balance shaft and balance shaft housing are linked together, it is characterized in that,
Also comprise black nut, described black nut is provided with open slot and locking screw; In the end of described balance shaft and the arranged outside that is positioned at the connection bearing inner ring step screw thread is arranged, on described balance shaft, a lock bolt is fastened on described black nut on the described balance shaft by described locking screw described black nut by described step screw threads for fastening.
2. balance shaft assembly according to claim 1 is characterized in that, the centre hole both sides of described balance shaft housing are provided with four groups of saddle clamp holes, and each side is provided with two groups respectively, and described saddle clamp hole is arranged for push up at the bottom of the shell oblique Eight characters formula from shell.
3. balance shaft assembly according to claim 1 is characterized in that, the balance shaft cap in the described balance shaft assembly is a steel stamping part.
4. balance shaft assembly according to claim 1 is characterized in that the junction of described balance shaft and balance shaft housing also is provided with two-lip seal, and filling has molybdenum disulphide between the lips of described two-lip seal.
5. balance shaft assembly according to claim 1 is characterized in that, in the inside of described balance shaft support, is vertically arranged with reinforced rib from the top of described balance shaft support to the sidewall bottom.
6. balance shaft assembly according to claim 1 is characterized in that, the top surface of described balance shaft support is provided with groove shape structure.
7. balance shaft assembly according to claim 1 is characterized in that, the material of described balance shaft support is a spheroidal graphite iron.
8. balance shaft assembly according to claim 1, it is characterized in that, also comprise and be used for fixing the integral type connecting panel that is connected described balance shaft top, described balance shaft support is provided with the support fixed orifice that is used to connect to ground, and described integral type connecting panel is provided with and is used for the corresponding connecting panel fixed orifice of described support fixed orifice.
9. balance shaft assembly according to claim 8 is characterized in that, the material of described integral type connecting panel is a cast steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102378964A CN101700733B (en) | 2009-11-13 | 2009-11-13 | Balance shaft assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102378964A CN101700733B (en) | 2009-11-13 | 2009-11-13 | Balance shaft assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101700733A CN101700733A (en) | 2010-05-05 |
| CN101700733B true CN101700733B (en) | 2011-07-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009102378964A Active CN101700733B (en) | 2009-11-13 | 2009-11-13 | Balance shaft assembly |
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| Country | Link |
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| CN (1) | CN101700733B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102555723A (en) * | 2010-12-15 | 2012-07-11 | 陈明伟 | Balance suspension system of heavy-duty automobile |
| CN103481739A (en) * | 2012-06-11 | 2014-01-01 | 广东富华重工制造有限公司 | Suspension structure of balance plate spring of truck |
| CN103223838B (en) * | 2013-04-11 | 2015-02-04 | 颜龙 | Through-out sleeve-type balance bridge |
| CN105437905A (en) * | 2014-09-26 | 2016-03-30 | 重庆凯恩机械制造股份有限公司 | Separated Steyr balance shaft |
| CN111873745A (en) * | 2020-07-07 | 2020-11-03 | 东南大学 | Z-shaped variable-rigidity anti-roll bar structure based on FSC racing car and adjusting method |
| CN112721564A (en) * | 2021-02-04 | 2021-04-30 | 中国重汽集团济南动力有限公司 | Light-weight balance shaft suspension |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2480224Y (en) * | 2001-06-11 | 2002-03-06 | 青岛港务局 | End fixing structure for car balance axle |
| CN2806213Y (en) * | 2005-05-30 | 2006-08-16 | 安徽华菱汽车集团有限公司 | Heavy-duty truck balancing suspension-balancing shaft |
| KR20070065561A (en) * | 2005-12-20 | 2007-06-25 | 현대자동차주식회사 | A balance shaft fixing structure |
-
2009
- 2009-11-13 CN CN2009102378964A patent/CN101700733B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2480224Y (en) * | 2001-06-11 | 2002-03-06 | 青岛港务局 | End fixing structure for car balance axle |
| CN2806213Y (en) * | 2005-05-30 | 2006-08-16 | 安徽华菱汽车集团有限公司 | Heavy-duty truck balancing suspension-balancing shaft |
| KR20070065561A (en) * | 2005-12-20 | 2007-06-25 | 현대자동차주식회사 | A balance shaft fixing structure |
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| Publication number | Publication date |
|---|---|
| CN101700733A (en) | 2010-05-05 |
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