CN203681270U - Carbon fiber transmission shaft provided with ball-cage type cardan joints - Google Patents
Carbon fiber transmission shaft provided with ball-cage type cardan joints Download PDFInfo
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- CN203681270U CN203681270U CN201420015303.6U CN201420015303U CN203681270U CN 203681270 U CN203681270 U CN 203681270U CN 201420015303 U CN201420015303 U CN 201420015303U CN 203681270 U CN203681270 U CN 203681270U
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- joint
- carbon fiber
- ball cage
- ball
- cage universal
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Abstract
The utility model provides a carbon fiber transmission shaft provided with ball-cage type cardan joints. The transmission shaft is installed in a cross-country vehicle and comprises a carbon fiber transmission shaft pipe, wherein a first ball-cage type cardan joint is connected with one end of the carbon fiber transmission shaft pipe, a second ball-cage type cardan joint is connected with the other end of the carbon fiber transmission shaft pipe, the first ball-cage type cardan joint is connected to an internal spline sleeve, the second ball-cage type cardan joint is connected to a rear axle main reducing gear of the cross-country vehicle, and the first ball-cage type cardan joint and the second ball-cage type cardan joint are driven at a constant speed. Due to the adoption of the structure, the carbon fiber transmission shaft is made to have a high critical speed. Due to the fact that the first ball-cage type cardan joint and the second ball-cage type cardan joint are driven at a constant speed, the working included angle of the carbon fiber transmission shaft can be increased to as large as 45 degrees, the upward jumping distance and downward jumping distance of a suspension of the cross-country vehicle can be increased, cross-country running ability is improved, and the damage to parts of a transmission system caused by inconstant transmission of a traditional universal joint is avoided.
Description
Technical field
The utility model relates to a kind of transmission shaft of cross country car, relates in particular to a kind of carbon fiber driving shaft that adopts ball cage universal-joint.
Background technology
The electric welded steel pipe that the cardan-shaft tube of automobile all adopts mild steel plate to roll is at present made, and arranges after internal diameter, external diameter and the length of determining central siphon according to whole vehicle body, also needs to check critical speed of drive shaft and torsional strength.And the calculating of transmission shaft critical speed is all generally to adopt the transmission shaft critical speed formula of extensively introducing on many documents:
nc=1.2x108
， r/min
Wherein: D, the external diameter of d--central siphon and internal diameter, mm;
The bearing length of L--transmission shaft, gets the width between centers of two universal-joints, mm.
In the time calculating critical speed nc lower than the maximum speed of revolution of transmission shaft, this transmission shaft just can not use.Because transmission shaft is in use, once it approaches critical speed, will cause resonance, middle part amount of deflection sharply strengthens, and vibration noise sharply strengthens, and even causes central siphon fracture.
Can learn from above formula, one of method that improves at present transmission shaft critical speed is to strengthen the D outer diameter of central siphon, but this has not only strengthened quality and the rotor inertia of transmission shaft, and is sometimes also subject to the restriction of structure or space layout; Be exactly two of method reduces the length L of transmission shaft, total due to general layout need transmission shaft length can not become, increase a center support in the middle of long transmission shaft have to being become to two sections, improve critical speed of drive shaft with this.
General commercial car can take such scheme to solve the problem of transmission shaft critical speed deficiency, but for cross country car, because arrangement space is very compact, increases the external diameter of cardan-shaft tube, and arrangement space is restricted, also can affect the off-road capability index of car load; On its suspension, jump, under the journey of slipping a line large, when fully loaded and unloaded, transmission shaft angle changes greatly, the work angle of transmission shaft is larger, if by transmission shaft subsection setup, certainly will can increase again the work angle of transmission shaft, the vibration that the variable speed transmission of the metal drive shaft of tradition center cross brings, can make the life and reliability of driving system parts reduce.
Therefore be necessary to design a kind of carbon fiber driving shaft of novel employing ball cage universal-joint, to overcome the problems referred to above.
Utility model content
The purpose of this utility model is to overcome the defect of prior art, and a kind of have higher critical speed, the work carbon fiber driving shaft of the lighter employing ball cage universal-joint of angle and weight are greatly provided.
The utility model is achieved in that
The utility model provides a kind of carbon fiber driving shaft that adopts ball cage universal-joint, is installed in cross country car, comprises a carbon fiber driving shaft pipe, and one end of described carbon fiber driving shaft pipe connects one first ball cage universal-joint, and the other end connects one second ball cage universal-joint; Wherein, described the first ball cage universal-joint is connected to an inner spline housing, and described the second ball cage universal-joint is connected to the rear-end gear reduction of cross country car, described the first ball cage universal-joint and described the second ball cage universal-joint constant speed transmission.
Further, described carbon fiber driving shaft pipe adopts polyacrylonitrile fibre silk to make.
Further, described carbon fiber driving shaft pipe is connected with described the first ball cage universal-joint and described the second ball cage universal-joint respectively by Wrapping formed mode.
Further, described the first ball cage universal-joint is connected and fixed by bolt and described inner spline housing.
Further, described the second ball cage universal-joint is provided with mounting hole, and the flange of itself and described rear-end gear reduction is bolted fixing.
The utlity model has following beneficial effect:
One end of described carbon fiber driving shaft pipe connects described the first ball cage universal-joint, and the other end connects described the second ball cage universal-joint; Wherein, described the first ball cage universal-joint is connected to described inner spline housing, and described the second ball cage universal-joint is connected to the rear-end gear reduction of cross country car, and carbon fiber driving shaft adopts said structure, makes it have higher critical speed; And described the first ball cage universal-joint and described the second ball cage universal-joint constant speed transmission, not only can make the work angle maximum of carbon fiber driving shaft be increased to 45 °, improve on cross country car suspension jump, under the journey of slipping a line, increase land locomotion ability, the damage of the variable speed transmission of having avoided again traditional Hooke's joint to driving system parts.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The structural representation of the carbon fiber driving shaft of the employing ball cage universal-joint that Fig. 1 provides for the utility model embodiment.
The specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making all other embodiment that obtain under creative work prerequisite, all belong to the scope of the utility model protection.
As Fig. 1, the utility model embodiment provides a kind of carbon fiber driving shaft that adopts ball cage universal-joint, is installed in cross country car, and it comprises a carbon fiber driving shaft pipe 3, described carbon fiber driving shaft pipe 3 adopts polyacrylonitrile fibre silk to make, and it forms by resin glue combination.One end of described carbon fiber driving shaft pipe 3 connects one first ball cage universal-joint 2, the other end connects one second ball cage universal-joint 4, in this preferred embodiment, described carbon fiber driving shaft pipe 3 is connected with described the first ball cage universal-joint 2 and described the second ball cage universal-joint 4 respectively by Wrapping formed mode.
As Fig. 1, described the first ball cage universal-joint 2 is connected to an inner spline housing 1, and described the second ball cage universal-joint 4 is connected to the rear-end gear reduction (not shown) of cross country car.In this preferred embodiment, described the first ball cage universal-joint 2 is connected and fixed by bolt and described inner spline housing 1; Described the second ball cage universal-joint 4 is provided with mounting hole, and the flange of itself and described rear-end gear reduction is bolted fixing, by above-mentioned fixed form, can guarantee the fastness of described the first ball cage universal-joint 2 and described the second ball cage universal-joint 4.Described the first ball cage universal-joint 2 and described the second ball cage universal-joint 4 constant speed transmissions
,make the work angle maximum of carbon fiber driving shaft be increased to 45 °, thus improve on cross country car suspension jump, under the journey of slipping a line, increase land locomotion ability, the damage of the variable speed transmission of having avoided again traditional Hooke's joint simultaneously to driving system parts.
As Fig. 1, the concrete application of this preferred embodiment is as follows: transmission shaft critical speed formula: nc=1.2x108
, actual is the nc=being derived by resonance theory
elastic modulus E=the 2.15x105Mpa of first known steel, bending resistance Moments of inertia J=(π (D4-d4))/64 in central siphon cross section, gravity acceleration g=9800mm/s2., the unit weight that in formula, q is central siphon, q=π (D2-d2) γ/4, the proportion that γ is steel, γ=7.85x10-5N/mm3.By J, q expression formula and actual numerical value substitution simplification just obtain: nc=1.2x108
.As shown in the above: critical speed is relevant with proportion γ (or density p) with the elastic modulus E of central siphon material, and nc is proportional to
.
And carbon fiber is a kind of new material of mechanical property excellence, its proportion is less than 1/4 of steel, and carbon fiber resin composite material tensile strength all more than 3500Mpa, is generally 7 ~ 9 times of steel, and its tensile modulus of elasticity is 2.30 ~ 4.30105Mpa, also higher than steel.The density of general carbon fiber is γ=1.72x10-5N/mm3.The intensity of common carbon fiber is that 1000 MPas (MPa), modulus (E) are 1.00x105Mpa left and right.High-performance carbon fibers is divided into again high-strength (intensity is that 2000MPa, modulus (E) are 2.50x105Mpa) and high model (modulus (E) is for more than 3.00x105Mpa).What intensity was greater than 4000MPa is called again superelevation strong type; Modulus (E) is called superelevation model for what be greater than 4.50x105Mpa.The E/q difference of steel and high model carbon fiber is larger, will improve 2.55 times than same size steel transmission shaft critical speed therefore adopt high model (modulus (E) is got 3.00x105Mpa) carbon fiber to make cardan-shaft tube.Adopt superelevation model (modulus is got 4.5x105Mpa) carbon fiber to make cardan-shaft tube and will improve 3.12 times than same size steel transmission shaft critical speed.Adopt high-strength (modulus is got 2.5x105Mpa) carbon fiber to make cardan-shaft tube and will improve 2.33 times than same size steel transmission shaft critical speed.Adopt universal (modulus is got 1.00x105Mpa) carbon fiber to make cardan-shaft tube and will improve 1.47 times than same size steel transmission shaft critical speed.If need identical critical speed, carbon fiber is made cardan-shaft tube by half as large many comparable steel transmission shaft external diameter.If need identical critical speed and identical cardan-shaft tube inside/outside diameter size, carbon fiber is made cardan-shaft tube by long 1.76 times of comparable steel transmission shafts length of tube.Therefore adopt described carbon fiber driving shaft pipe 3 can make carbon fiber driving shaft there is higher critical speed.
By mentioning in pertinent literature, Hooke's joint angle is unsuitable excessive, and when work angle increases to 16 ° by 4 °, the needle bearing life-span will drop to 1/4 of the former life-span.And the cross country car maximum functional angle of short wheelbase even can reach 30 °, not only the center cross life-span can obviously reduce, and due to larger variable speed transmission, also can cause change speed gear box, the leakage of oil of main reduction gear oil sealing; Or change speed gear box, Driven Gear of Final Reduction Gear damage; Or even change speed gear box, bevel housing break.And the two ends of described carbon fiber driving shaft pipe 3 adopt constant speed ball cage universal-joints (described the first ball cage universal-joint 2 and described the second ball cage universal-joint 4), not only can make maximum increasing of its work angle be increased to 45 °, improve on cross country car suspension jump, under the journey of slipping a line, increase land locomotion ability, and the constant speed transmission damage of variable speed transmission to driving system parts of having avoided traditional Hooke's joint.
The utility model is installed described inner spline housing 1 on described the first ball cage universal-joint 2, in gear box output end inside, castellated shaft is set, and oil sealing is set on housing, described inner spline housing 1 directly inserts in spline, its outer rim coordinates with oil sealing, described inner spline housing 1 can be free to slide with castellated shaft, jumps off and in jump process, play the elongation of transmission shaft and the effect of shortening on suspension.This structure can effectively reduce weight and the rotor inertia of the axle of passing on Gong; Improve the position of described carbon fiber driving shaft pipe 3 and spline fitted place oil sealing, reduced cross country car damage to oil sealing and spline due to silt and dust in land locomotion; In the time of dismounting only with dismantling or the bolt of the fastening other end, the time that has reduced assembling and safeguarded.
In sum, the carbon fiber driving shaft of described employing ball cage universal-joint has higher critical speed, the advantages such as angle, weight are light, rotor inertia is less of working greatly.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (5)
1. adopt a carbon fiber driving shaft for ball cage universal-joint, be installed in cross country car, it is characterized in that, comprise a carbon fiber driving shaft pipe, one end of described carbon fiber driving shaft pipe connects one first ball cage universal-joint, and the other end connects one second ball cage universal-joint;
Wherein, described the first ball cage universal-joint is connected to an inner spline housing, and described the second ball cage universal-joint is connected to the rear-end gear reduction of cross country car, described the first ball cage universal-joint and described the second ball cage universal-joint constant speed transmission.
2. the carbon fiber driving shaft of employing ball cage universal-joint as claimed in claim 1, is characterized in that: described carbon fiber driving shaft pipe adopts polyacrylonitrile fibre silk to make.
3. the carbon fiber driving shaft of employing ball cage universal-joint as claimed in claim 1, is characterized in that: described carbon fiber driving shaft pipe is connected with described the first ball cage universal-joint and described the second ball cage universal-joint respectively by Wrapping formed mode.
4. the carbon fiber driving shaft of employing ball cage universal-joint as claimed in claim 1, is characterized in that: described the first ball cage universal-joint is connected and fixed by bolt and described inner spline housing.
5. the carbon fiber driving shaft of employing ball cage universal-joint as claimed in claim 1, is characterized in that: described the second ball cage universal-joint is provided with mounting hole, and the flange of itself and described rear-end gear reduction is bolted fixing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420015303.6U CN203681270U (en) | 2014-01-10 | 2014-01-10 | Carbon fiber transmission shaft provided with ball-cage type cardan joints |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420015303.6U CN203681270U (en) | 2014-01-10 | 2014-01-10 | Carbon fiber transmission shaft provided with ball-cage type cardan joints |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203681270U true CN203681270U (en) | 2014-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420015303.6U Expired - Fee Related CN203681270U (en) | 2014-01-10 | 2014-01-10 | Carbon fiber transmission shaft provided with ball-cage type cardan joints |
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| CN (1) | CN203681270U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242682A (en) * | 2019-04-22 | 2019-09-17 | 武汉理工大学 | A kind of torque transmission shaft overload protection method based on carbon fibre composite |
-
2014
- 2014-01-10 CN CN201420015303.6U patent/CN203681270U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242682A (en) * | 2019-04-22 | 2019-09-17 | 武汉理工大学 | A kind of torque transmission shaft overload protection method based on carbon fibre composite |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140702 Termination date: 20210110 |
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| CF01 | Termination of patent right due to non-payment of annual fee |