CN201496419U - Constant-speed transmission shaft with telescopic middle shaft - Google Patents
Constant-speed transmission shaft with telescopic middle shaft Download PDFInfo
- Publication number
- CN201496419U CN201496419U CN2009203027373U CN200920302737U CN201496419U CN 201496419 U CN201496419 U CN 201496419U CN 2009203027373 U CN2009203027373 U CN 2009203027373U CN 200920302737 U CN200920302737 U CN 200920302737U CN 201496419 U CN201496419 U CN 201496419U
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- China
- Prior art keywords
- jack shaft
- middle shaft
- axle sleeve
- transmission shaft
- core
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Abstract
The utility model relates to a transmission shaft of a front wheel and a back wheel of an automobile or other mechanical transmission equipment, in particular to a structure of a middle shaft of a driving shaft of a front wheel used for an automobile. The utility model aims to provide a constant-speed transmission shaft with a telescopic middle shaft, which has favorable lubrication condition and superior glide performance of the middle shaft. The constant-speed transmission shaft with the telescopic middle shaft is provided with a fixed type constant-speed universal joint in the center of the end of a driving wheel, a fixed type constant-speed universal joint in the center of the end of a gearbox and a middle shaft, wherein the middle shaft comprises a middle shaft sleeve, a middle shaft core, a retainer and rolling components, the middle shaft sleeve and the middle shaft core are in sleeve joint, ditches which are mutually matched are averagely distributed at the circumferential direction of the internal surface of the middle shaft sleeve and the circumferential direction of the external surface of the middle shaft core, the rolling components are positioned in the ditches between the middle shaft sleeve and the middle shaft core, and the mutual positions between the rolling components are fixed by the retainer. The middle shaft comprises the middle shaft sleeve, the middle shaft core, the retainer and the rolling components and has superior transmission performance.
Description
Technical field
The utility model relates to the front and back wheels transmission shaft of automobile or other mechanical transmissions, particularly a kind of automobile jack shaft structure of front wheel driving shaft.
Background technique
The design of truck drive shaft improves through groping for a long time, and during the different existence reality vehicle design of various drive mechanism type degree produces.
As shown in Figure 1, the constant speed transmission shaft of a large amount of automobile driving wheels generally is made up of the center fixation type constant velocity universal joint 10 of driving wheel end, the center movable constant velocity universal joint 20 ' and the jack shaft 30 ' of gearbox end.Center fixation type constant velocity universal joint 10 has two kinds of structures, is respectively BJ type and UJ type.Shown in Fig. 2, Fig. 2-1, the center fixation type constant velocity universal joint of BJ type has bell overcoat 11, steel ball 12, star sleeve 13 and retainer 14, and it has the raceway groove 15 of ring, the raceway groove of the center fixation type constant velocity universal joint of UJ type is formed by two sections, one section is ring raceway groove 15, another section is cylindrical raceway groove 16, and between be tangent connection.BJ type and UJ type overcoat connecting end Placement are various, and external splines formula, internal spline formula, flange-type or discus formula are arranged.Present most of manufacturer adopts BJ type structure, because BJ type structure is more easy to process than UJ type structure, but the pendulum angle of UJ type can reach about 51 degree than big 5 degree of BJ type.There is not the automobile of specific (special) requirements pendulum angle to adopt BJ type structure at present more.Shown in Fig. 3, Fig. 3-1 and Fig. 3-2, the structure of center movable universal joint has many kinds, wherein TJ type (as shown in Figure 3) has sliding sleeve 21 ' and trident bearing 25 ', VJ type (shown in Fig. 3-1) has sliding sleeve 21 ', steel ball 22 ', retainer 23 ' and star sleeve 24 ', and DOJ type (shown in Fig. 3-2) has sliding sleeve 21 ', steel ball 22 ', retainer 23 ' and star sleeve 24 '.The sliding sleeve connecting end Placement of TJ type and DOJ type all has external splines formula, flange-type or internal spline formula, and the VJ type has external splines formula or discus formula.The jack shaft 30 ' of Fig. 1 has two kinds of hollow axis pole and solid shaft, and hollow axis pole has better vibration resistance than solid shaft.
There are the following problems for above-mentioned structure shown in Figure 1:
1) constant speed transmission shaft input angle is less than normal
The universal joint that the gearbox end of constant speed transmission shaft adopts is a center movable constant velocity universal joint, and the swing angle of center movable universal joint is little, causes whole transmission shaft input angle less than normal.The constant speed transmission shaft is BJ type+DOJ type as shown in Figure 4, the transmission shaft swing angle of this kind model has been maximum in the transmission shaft of employing center movable constant velocity universal joint, but because structure is limit, pivot angle can not surpass 25 degree, and other maximum deflection angles of transmission shaft that adopt TJ type or VJ type center movable constant velocity universal joint only are 23 degree and 15 degree.
As shown in Figure 5, connect driving by transmission shaft 300 between gearbox 100 and the both sides tire 200, the input angle of transmission shaft is an angle between transmission shaft and the horizontal line, and transmission shaft gearbox end universal joint power output center of effort arrives gearbox apart from d, gearbox road clearance h.Can know by inference, when both sides tire pitch fixedly the time, transmission shaft input angle a is big more, the value of gearbox road clearance h can be big more, mean that vehicle can have higher domain, have better cross-country ability, present many SUV automobiles, particularly many sports type vehicles (as ATV, UTV) all have this demand.
2) circumferentially drive gap is big
Mainly by causing on the movable constant velocity universal joint of center, it should satisfy beat to circular gap owing to center movable universal joint, satisfies again and moves, and it just causes the difficulty of manufacturing to strengthen, and the die cavity of overcoat no longer carries out machining all by cold extrusion shaped; Because diameter is big, wall is thin, and is in uneven thickness, produces distortion in heat treatment process, causes with the matching gap of inner body greatly, and at present general gap is all about 0.1～0.2mm.The gap is little, and is just stuck easily, moves dumb; Mobile flexible, the gap is big again.Transmission shaft had idle stroke when this just caused vehicle starting, felt that obviously tire lags behind the transmission of gearbox, and can hear because of causing Strike note in the gap.
3) poor, the gearbox end of shock resistance is subjected to the bending moment force effect big
Because the gap of center movable constant velocity universal joint is big, in the using process of transmission shaft, middle axostylus axostyle is easy to generate shake or vibrations by that head of mobile terminal; And transmission shaft is when transmitting torque, though it is stressed evenly to one week of mobile terminal shell, but stress surface is not orthogonal to output shaft of gear-box heart line, stressed every bit to the gearbox end distance from different, it is also different that the gearbox end is produced moment of flexure, and it is poor that each force bearing point can produce a moment of flexure to the gearbox end, along with center of effort outwards moves, the moment of flexure difference is increasing, finally influences the gearbox life-span.
The transmission shaft of center movable constant velocity universal joint has appearred substituting with center fixation type constant velocity universal joint at present, the function that moves axially that original center movable constant velocity universal joint is finished is designed on the jack shaft and realizes, but it is because inconsiderate to the design of jack shaft, the jack shaft shuffle effect is relatively poor, has caused transmission shaft enterprise in fact still to adopt the phenomenon of center movable constant velocity universal joint in a large number.
The model utility content
The purpose of this utility model is to provide a kind of possess good lubrication condition, the good constant speed transmission shaft with scalable jack shaft of jack shaft slip property.
Technical solutions of the utility model are as follows:
The utility model is that center movable constant velocity universal joint is designed to center fixation type constant velocity universal joint, and telescopic section is designed into jack shaft inside.Jack shaft is made up of middle axle sleeve, jack shaft core, retainer and roll piece, rolls in the raceway groove of axle sleeve and axle core by roll piece, realizes the flexible of transmission shaft, has superior transmission performance.
A kind of constant speed transmission shaft with scalable jack shaft, have driving wheel end center fixation type constant velocity universal joint, gearbox end center fixation type constant velocity universal joint and jack shaft, axle sleeve, jack shaft core, retainer and roll piece in the middle of above-mentioned jack shaft comprises, middle axle sleeve and jack shaft core retainer plate connect, and the internal surface of middle axle sleeve outer surface circumferential and the jack shaft core circumferentially is evenly distributed the raceway groove of working in coordination, in the raceway groove of above-mentioned roll piece between middle axle sleeve and jack shaft core, and by the fixing mutual alignment between the roll piece of retainer.
The center fixation type constant velocity universal joint and the jack shaft joint of above-mentioned driving wheel end and gearbox end all are provided with dirt-proof boot, and the middle axle sleeve opening end of jack shaft is positioned at dirt-proof boot.
Bore sleeve and jack shaft core cross section are circumferential in the middle of above-mentioned, and roll piece is a steel ball.
Axle sleeve outer diameter D 1, jack shaft core outer diameter D, middle axle sleeve, axle core circumferencial direction raceway groove are counted M, circumferencial direction steel ball centre of sphere position center circle diameter D0, steel ball size d in the middle of above-mentioned, axially the centre of sphere is counted N apart from the steel ball in L and the raceway groove and had following relation each other between the steel ball:
d＝1/7～1/6D1
L＝1.3～1.6d
M＝6～10
D0＝4～5d
D＝0.6～0.7D1
N＝5～8
The cross section of above-mentioned raceway groove adopts two circular arcs or single circular arc.
Bore sleeve and jack shaft core cross section are regular polygon in the middle of above-mentioned, and roll piece is a needle roller.
The utlity model has following advantage:
The input angle is big
Because center fixation type constant velocity universal joint is all adopted at two ends, so two ends all have the performance of big pivot angle, transmission shaft input angle of the present utility model can reach 46 ° in theory, actual considering turns to reason, maximum input angle can reach about 37 °, is fit to the required input angle of all vehicles at present fully.
Extending amount is big
The axostylus axostyle axial space is big in the middle of the utility model, and extending amount increases greatly than original transmission shaft; And the constant velocity universal joint center of transmission shaft gearbox end of the present utility model is constant, amount of movement can not produce shell interferes, the extending amount of jack shaft can not influence the relation between axostylus axostyle and the shell, extending amount needs only the permission of axostylus axostyle length, the very big usage requirement that enough is fit to various vehicles that can do.
C) vibration is little
Because the very little center fixation type constant velocity universal joint of matching gap is all adopted at the utility model two ends, middle axle sleeve, jack shaft core and roll piece adopt slight interference to cooperate again, make stable drive in the transmission shaft using process, non-jitter.
D) elasticity is little
The utility model adopts the linear rolling track principle, and under the grease lubrication condition, in the telescopic process, roll piece is done rolling motion and do not had slide relative, so resistance is very little.
Description of drawings
Fig. 1 is the transmission shaft generalized section of employing center movable constant velocity universal joint.
Fig. 2 is the generalized section of UJ type center fixation type constant velocity universal joint.
Fig. 2-1 is the generalized section of BJ type center fixation type constant velocity universal joint.
Fig. 3 is the generalized section of TJ type center movable constant velocity universal joint.
Fig. 3-1 is the generalized section of VJ type center movable constant velocity universal joint.
Fig. 3-2 is the generalized section of DOJ type center movable constant velocity universal joint.
Fig. 4 is a transmission shaft input maximum angular schematic representation shown in Figure 1.
Fig. 5 is automobile tire and gearbox position view.
Fig. 6 is the utility model transmission shaft generalized section.
Fig. 6-1 is a B place enlarged diagram among Fig. 6.
Fig. 6-2 be among Fig. 6 A-A to the jack shaft phantom.
Fig. 7 is a transmission shaft input maximum angular schematic representation shown in Figure 6.
Fig. 8 is for adopting the utility model transmission shaft generalized section of flange connection.
Fig. 8-1 is for adopting the utility model transmission shaft generalized section of discus Placement.
Fig. 8-2 is for adopting the utility model transmission shaft generalized section of internal spline Placement.
Fig. 9 is another embodiment's jack shaft cut-away section schematic representation of the utility model.
Figure 10 is the schematic cross-section of Fig. 9.
Embodiment
(embodiment 1)
See Fig. 6, Fig. 6-1 and Fig. 6-2, the utility model transmission shaft has driving wheel end center fixation type constant velocity universal joint 10, gearbox end center fixation type constant velocity universal joint 20 and jack shaft 30, axle sleeve 31 in the middle of jack shaft comprises, jack shaft core 33, retainer 34 and roll piece 32, roll piece 32 is a steel ball in the present embodiment, the fitting surface of middle axle sleeve and jack shaft core is a circumferential surface, be respectively equipped with the corresponding raceway groove that is used to hold steel ball, the shape in raceway groove cross section can be two circular arcs or single circular arc, retainer is used for fixing the relative position of steel ball, guarantees that steel ball rolls, carry-over moment.
Shown in Fig. 6-1 and Fig. 6-2, middle axle sleeve external diameter is D1, jack shaft core external diameter is D, middle axle sleeve, axle core circumferencial direction raceway groove number are M, and circumferencial direction steel ball centre of sphere position center circle diameter is D0, and steel ball size is d, axially centre of sphere distance is L between the steel ball, steel ball number in the single raceway groove is N, rolls in raceway groove smoothly and guarantees that enough transmission of torque render a service in order to ensure steel ball, and there is following relation in above-mentioned each parameter:
d＝1/7～1/6D1
L＝1.3～1.6d
M＝6～10
D0＝4～5d
D＝0.6～0.7D1
N＝5～8
According to the minimum quiet requirement of strength of turning round of above-mentioned relation and relevant industries standard, the gauge table of axostylus axostyle telescopic section is as shown in the table in the middle of the utility model.
Cooperate for slight interference between above-mentioned steel ball, middle axle sleeve and the jack shaft core, add grease lubrication in the raceway groove that steel ball rolls, so steel ball rolls in raceway groove steadily and surface friction drag is very little, when transmission shaft is worked, steel ball back and forth rolls in raceway groove, realizes the jack shaft locomotive function.
As shown in Figure 7, for the utility model input maximum angular schematic representation, because the gearbox end also adopts center fixation type constant velocity universal joint, its input angle reaches maximum 46 degree, can satisfy whole automobile-used constant speed transmission shaft usage requirement at present fully.According to different Placement requirements, the utlity model has the transmission shaft example with the different Placements shown in Fig. 8-2 as Fig. 8, Fig. 8-1.In order to keep the sealing cleaning of the scalable part of jack shaft, universal joint and jack shaft joint all are provided with dirt-proof boot 40, and the opening end of middle axle sleeve is placed in the dirt-proof boot, enter with dust protection.
(embodiment 2)
The utility model jack shaft can also adopt other structure, the inner chamber of axle sleeve 31 and the profile of jack shaft core 33 are regular polygon promptly, roll piece 32 adopts the needle roller type, and corresponding retainer 34 also is regular polygon, and the transmission of jack shaft driving torque is finished by the position, corner of retainer.
Middle axle sleeve, jack shaft core and needle roller adopt slight interference to cooperate and install, lubricated in jack shaft core appearance and middle axle sleeve internal surface fatten, can guarantee jack shaft realization Telescopic equally, and because the surface of contact of needle roller is bigger, the using process antiwear property is strong.
Claims (6)
1. constant speed transmission shaft with scalable jack shaft, has driving wheel end center fixation type constant velocity universal joint (10), gearbox end center fixation type constant velocity universal joint (20) and jack shaft (30), it is characterized in that: axle sleeve (31) in the middle of above-mentioned jack shaft (30) comprises, jack shaft core (33), retainer (34) and roll piece (32), middle axle sleeve (31) and jack shaft core (33) socket, and the internal surface of middle axle sleeve outer surface circumferential and the jack shaft core circumferentially is evenly distributed the raceway groove of working in coordination, in the raceway groove of above-mentioned roll piece (32) between middle axle sleeve and jack shaft core.
2. the constant speed transmission shaft with scalable jack shaft according to claim 1, it is characterized in that: the center fixation type constant velocity universal joint of above-mentioned driving wheel end and gearbox end and jack shaft joint all are provided with dirt-proof boot (40), and middle axle sleeve (31) opening end of jack shaft is positioned at dirt-proof boot.
3. the constant speed transmission shaft with scalable jack shaft according to claim 2 is characterized in that: axle sleeve (31) inner chamber and jack shaft core (33) cross section are circumferential in the middle of above-mentioned, and roll piece (32) is a steel ball.
4. the constant speed transmission shaft with scalable jack shaft according to claim 3 is characterized in that: axle sleeve outer diameter D 1, jack shaft core outer diameter D, middle axle sleeve, axle core circumferencial direction raceway groove are counted M, circumferencial direction steel ball centre of sphere position center circle diameter D0, steel ball size d in the middle of above-mentioned, axially the centre of sphere is counted N apart from the steel ball in L and the raceway groove and had following relation each other between the steel ball:
d＝1/7～1/6D1
L＝1.3～1.6d
M＝6～10
D0＝4～5d
D＝0.6～0.7D1
N＝5～8
5. the constant speed transmission shaft with scalable jack shaft according to claim 3 is characterized in that: the cross section of above-mentioned raceway groove adopts two circular arcs or single circular arc.
6. the constant speed transmission shaft with scalable jack shaft according to claim 2 is characterized in that: axle sleeve (31) inner chamber and jack shaft core (33) cross section are regular polygon in the middle of above-mentioned, and roll piece (32) is a needle roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203027373U CN201496419U (en) | 2009-04-30 | 2009-04-30 | Constant-speed transmission shaft with telescopic middle shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203027373U CN201496419U (en) | 2009-04-30 | 2009-04-30 | Constant-speed transmission shaft with telescopic middle shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201496419U true CN201496419U (en) | 2010-06-02 |
Family
ID=42439627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203027373U Expired - Lifetime CN201496419U (en) | 2009-04-30 | 2009-04-30 | Constant-speed transmission shaft with telescopic middle shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201496419U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101876351B (en) * | 2009-04-30 | 2012-05-09 | 常州超宇机械制造有限公司 | Constant-speed transmission shaft with telescopic middle shaft |
| CN105156487A (en) * | 2015-06-19 | 2015-12-16 | 江苏荣基重工科技有限公司 | Cardan drive device |
| CN107269725A (en) * | 2017-06-13 | 2017-10-20 | 北京新能源汽车股份有限公司 | Drive shaft assembly and car |
-
2009
- 2009-04-30 CN CN2009203027373U patent/CN201496419U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101876351B (en) * | 2009-04-30 | 2012-05-09 | 常州超宇机械制造有限公司 | Constant-speed transmission shaft with telescopic middle shaft |
| CN105156487A (en) * | 2015-06-19 | 2015-12-16 | 江苏荣基重工科技有限公司 | Cardan drive device |
| CN107269725A (en) * | 2017-06-13 | 2017-10-20 | 北京新能源汽车股份有限公司 | Drive shaft assembly and car |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100602 Effective date of abandoning: 20090430 |