CN202641247U - Automobile wheel hub unit capable of separately connecting inner side end of wheel hub - Google Patents

Abstract

The utility model discloses an automobile wheel hub unit capable of separately connecting the inner side end of a wheel hub, comprising a core shaft, wherein the inner side of the core shaft is provided with a molding end and the core shaft is provided with an outer ring, an inner ring and a clutch ring; a gasket is arranged between the molding end and the clutch ring; the molding end is used for sequentially fastening the gasket, the clutch ring and the inner ring on the core shaft through a flange; an inner chamfer is arranged at the bent corner part of the gasket, which faces the flange of the molding end; the inner chamber is a variable camber curve surface; a cylindrical roller pin bearing is matched with the inner side end of a shaft hole of the core shaft and a deep groove spherical bearing is matched with the outer side end; and the inner ring is provided with an inclined tooth gear and a wheel hub bearing unit is subjected to speed measurement by matching a speed sensor. According to the automobile wheel hub unit, a clamping ring arranged on the flange is canceled and one gasket is used for replacing the clamping ring; the section of the gasket is quasi-rectangular; fixing pressure of the flange is transmitted to the upper end face of the clutch ring through upper and lower end faces of the gasket to vertically press the clutch ring; and the fixing stability and reliability are better, and a flange riveting part of the flange of the molding end is effectively prevented from forming cracks.

Description

The automobile hub unit of the separable connection of wheel hub medial extremity

Technical field

The utility model relates to automobile hub unit, is specifically related to need drive at the wheel hub medial extremity the driving hub-bearing unit of connection.

Background technology

Present many automobiles adopt the type of drive of four wheel drive, thereby can obtain good dynamic property.But when good level road travelled, the drive form of two-wheel drive just can make vehicle obtain enough dynamic property, if the oil consumption of still adopting the drive form of four wheel drive can increase automobile reaches because the variable speed of four-wheel causes the wearing and tearing of tire.Therefore, four-wheel drive car need to install a kind of device additional, can make chaufeur according to automobile running working condition, and wherein two wheels are separated and combination with engine power, realizes that two-wheel drive and four wheel drive switch.Sports utility vehicle, pick up lorry and box-body truck traditional on the domestic market have all adopted the four wheel drive form, in driving system, increase a power divider device, chaufeur makes the gear engagement in the part-time case by the part-time case operating control and separates, thereby whether control front-wheel (trailing wheel) participates in driving.This four wheel drive form increases auto cost, and driving efficiency reduces.

Traditional Automobile drive moment normally by transmission shaft with transmission of power to the wheel hub of the hub outside, driving automobile rotation of wheel.Structural strength when the structural strength of this structural requirement wheel shaft, mandrel and overhanging axostylus axostyle is greater than by wheel hub medial extremity transmitting torque.

Also there is at present hub-bearing unit to be rotated the engagement of moment or to separate transmission at the wheel hub medial extremity, the mode of this wheel hub medial extremity transmission of drive force square can improve the degree of utilization of fuel and promote automotive performance when alleviating vehicle weight, respond faster and process, be more conducive to alleviate the unsprung weight of suspension system.It has cancelled traditional part-time case and accessory device thereof, has reduced amount of parts, has reduced auto cost, and has improved the driving efficiency of power.

Adopt the wheel hub medial extremity to drive link, following Fig. 1 of turnup structure of its mandrel part is to shown in Figure 3: the round clasp with opening is placed at flange riveted place, internal diameter is slightly less than outside diameter of mandrel, and opening is for after being enclosed within it on mandrel, can tightly touch the outside diameter of mandrel surface; The snap ring cross section is circular, is during for the mandrel flange, and the outside face that bent angle is close to snap ring forms circular-arc, concentrates and folding of material with the stress that reduces this place.But adopt said structure to have following technical matters: dissect object analysis, because Snap ring diameter is less, the fold cracks of corner is still inevitable behind the mandrel flange; Simultaneously, the corner also can form a larger radial component to the clutch ring by snap ring during flange, cause clutch ring radial deformation, even may affect accuracy of mesh and the alerting ability of clutch ring and outer actuating device, can find out obviously that from Fig. 3 there is fold cracks on its surface.

The utility model content

Technical problem to be solved in the utility model provides the automobile hub unit of the separable connection of a kind of wheel hub medial extremity, can Effective Raise clutch ring and stability and the reliability of outer actuating device.

For solving the problems of the technologies described above, the utility model adopts following technical scheme: the automobile hub unit of the separable connection of wheel hub medial extremity, comprise mandrel, the inboard of mandrel is provided with forming ends, mandrel is provided with outer ring, inner ring and clutch ring, it is characterized in that: be provided with pad between forming ends and the clutch ring, forming ends is fastened on pad, clutch ring and inner ring on the mandrel successively by the flange riveted.

Further, pad is provided with interior chamfering towards forming ends flange corner.

Further, interior chamfering is the variable curvature curved surface.

Further, the axis hole medial extremity of mandrel is equipped with the cylinder needle bearing, and external side end is equipped with deep groove ball bearing.

Further, inner ring is provided with angular gear, and the cooperation of Negotiation speed sensor is tested the speed to hub-bearing unit.

Further, angular gear and inner ring are interference fit.

Further, the outer ring is provided with raceway in the circular conical surface, and the bottom surface of raceway element line is logarithmic dimpling curve in the circular conical surface.

Further, inner ring is provided with the outer raceway of circular conical surface, and the bottom surface element line of the outer raceway of circular conical surface is asymmetric dimpling curve.

Further, be equipped with sealing member between the both sides stomidium of inner ring and outer ring.

The utility model is owing to having adopted technique scheme, the snap ring at the existing flange place of cancellation, the substitute is a pad, the cross section rectangle that is as the criterion, the fixation pressure of flange is the upper surface that is delivered to the clutch ring by the upper and lower end face of pad, vertically push down the clutch ring, fixing stability and reliability are all better, have effectively avoided forming ends flange riveted place crackle to occur.

Description of drawings

Fig. 1 is existing forming ends flange riveted position schematic diagram;

Fig. 2 is existing forming ends flange (material object) section drawing;

Fig. 3 is that local among Fig. 2 (in the frame) amplifies 500 * schematic diagram;

Fig. 4 is the structural representation of the automobile hub unit of the separable connection of the utility model wheel hub medial extremity;

Fig. 5 is the structural representation at the utility model forming ends flange riveted position;

Fig. 6 is the utility model forming ends flange (material object) section drawing;

Fig. 7 is that local among Fig. 6 (in the frame) amplifies 500 * schematic diagram.

The specific embodiment

Below in conjunction with accompanying drawing preferred embodiment of the present utility model is further described.

Such as Fig. 4 to the automobile hub unit that Figure 7 shows that the separable connection of the utility model wheel hub medial extremity, comprise outer ring 14 and mandrel 1, the inner medial extremity of the central stepped of mandrel 1 is equipped with columna needle bearing 8, its external side end is equipped with a row deep groove ball bearing 2, matches with constant velocity joint by this two row bearing.Mandrel 1 is provided with two taper inner rings 12, a upper and lower side all has the clutch ring 11 of spline and the pad 10 in a box-shaped cross section, in the present embodiment, and the clutch ring 11 preferred straight gears that adopt.The forming ends 9 of mandrel 1 inboard is fastened on pad 10, clutch ring 11 and inner ring 12 between the forming ends 9 and the shaft shoulder of mandrel 1 by the flange riveted.Pad 10 is provided with interior chamfering towards forming ends flange corner, and interior chamfering is the variable curvature curved surface.Utilize finite element simulation and trial production test to combine, obtain flange riveted different phase, the stress distribution of corner contact area when difference curves angle, adjust the radian of the transition fit bent angle diverse location of pad 10 and riveted flange with this, so that the maximum stress of corner descends 40%～50%, effectively avoid the flange riveted crackle to occur; Studies show that, the curvature of chamfering is the function that flange curves angle in the pad, and its functional equation is relevant with height, thickness and the diameter of flange mandrel, and is relevant with the die profile, also relevant with die spinning speed vector with the pressure of flange riveted.

Mandrel 1 inboard front end offers part spline 7, is meshed with the lower side spline of clutch ring 11.Box-shaped cross section pad 10 is positioned at the front end of spline 7, nestle up the medial surface of forming ends 9 of mandrel 1 and the leading flank of clutch ring 11, the height of a little higher than forming ends 9 of the height of pad 10, the curved surface arc radius size of its bottom are being controlled the radius of curvature size of mandrel forming ends 9.The small end of inboard inner ring 12 has an external part, which is provided with an angular gear 4 and tests the speed for tachogen 3, and both are interference fit at fitting surface, guarantee the accuracy that reliably connects and test the speed.Be equipped with the outer raceway 19 of circular conical surface on two inner rings 12, outer ring 14 is provided with raceway 18 in the two row circular conical surfaces, is provided with taper roller 13 between the outer raceway 19 of raceway 18 and circular conical surface in the circular conical surface.The upper end 15 of outer ring 14 is provided with bolt hole, is used for and the steering swivel (accompanying drawing is not shown) on the suspension system is connected, and offers oblique through hole on the intermediate flange and is used for installation tachogen 3.Taper roller 13 forms inner ring assembly by 5 guiding of nylon retainer with inner ring 12.The large end face of taper roller 13 is spherical crown surface, with the moment of rolling friction of the large end face that reduces taper roller.The bottom surface of raceway 18 element line is standard logarithmic type dimpling curve in the circular conical surface:

$C=0.2\·\ln \left[\frac{1}{1.0067-{(\frac{2\·\mathrm{\λ}-1}{k}-1)}^2}\right]$

K is the quantity that raceway is divided into flakelet in the formula, and λ is the position coordinate of flakelet.

Can guarantee under normal load, be evenly distributed along effective length of contact upper stress of taper roller and raceway main supporting surface; Under utmost point heavy lift or during roller generation deflection, can eliminate or weaken the stress at rolling contact surface two ends and concentrate, thereby so that hub-bearing unit is difficult for occuring early failure.

The bottom surface element line of the outer raceway 19 of circular conical surface is asymmetric dimpling curve.Because inner ring 12 and the mandrel 1 of the utility model automobile hub bearing structure match, mandrel 1 combines with brake disc (not shown in the accompanying drawing), during each brake, all may be subject to an additional impact loading between the rolling body of bearing and the raceway, the load distribution is basic on the raceway in the former design distributes uniformly thereby change.In order to offset the impact of this distinctive additional impulsive force, by Finite Element Simulation Analysis, set up the math modeling that this additional impulsive force distributes, and itself and logarithmic curve equation under the former uniform load have been superposeed, obtain an asymmetric dimpling logarithmic curve equation

K is the quantity that raceway is divided into flakelet in the formula, and λ is the position coordinate of flakelet, and ω is the width of flakelet, and ρ is raceway curvature, f(q, ρ) be the load distribution function on each flakelet.

By finite element simulation as can be known, use the raceway shape that such surface composition consists of, can guarantee that hub-bearing unit is when bearing larger radial weight, even also bear axial load and the swing torque Action of Combined Loads of equal magnitude, rolling body also still can be in accurate pure rolling with raceway and contact, thereby when preventing heavy duty, actv. because moving contact increases the temperature rise that produces, can reach best load-carrying capacity and high reliability.

The external side end of mandrel 1 offers the circular flange dish 16 of bolt hole, by bolt 17 it is connected (not shown in the accompanying drawing) with wheel with brake disc.Be equipped with sealing member 6 between the both sides stomidium of inner ring 12 and outer ring 14, so that the lubricating grease of bearing inside can not run off, outside dust and rainwater can not enter simultaneously, prolongs the service life of bearing.

The inboard four wheel drive vehicle of transmitting of the applicable rotating torque wheel hub of the utility model hub-bearing unit.

The middle part of the mandrel 1 of the utility model automobile hub bearing is provided with cylinder needle bearing 8 and deep groove ball bearing 2, be arranged with two inner rings 12 on the mandrel 1, a upper and lower side is offered clutch ring 11 and the packing ring 10 of spline, inner ring 12 is provided with the outer raceway 19 of circular conical surface, the centre hole inboard of outer ring 14 is provided with raceway 18 in the two row circular conical surfaces, be provided with taper roller 13 between the outer raceway 19 of raceway 18 and circular conical surface in the circular conical surface, the spline engagement of the clutch ring 11 that is fixed on mandrel 1 medial extremity by the upside is delivered to mandrel 1 with the spline engagement of rotating torque by the lower side, circular flange dish 16 by mandrel 1 finally is delivered to rotating torque on the wheel again, thereby so that can realizing the wheel hub medial extremity, this hub-bearing unit carries out the moment transmission, and the control setup by peripheral hardware realizes the engagement of constant velocity joint and clutch ring 11 upper end splines or separates being connected control, and as can be seen from Figure 7 its surface does not have obvious fold cracks.

Only be specific embodiment of the utility model below, but technical characterictic of the present utility model is not limited to this.Any take the utility model as the basis, for realizing essentially identical technique effect, done the ground simple change, be equal to replacement or modification etc., all be covered by among the protection domain of the present utility model.

Claims (9)

1. the automobile hub unit of the separable connection of wheel hub medial extremity, comprise mandrel, the inboard of described mandrel is provided with forming ends, described mandrel is provided with outer ring, inner ring and clutch ring, it is characterized in that: be provided with pad between described forming ends and the described clutch ring, described forming ends is fastened on described pad, described clutch ring and described inner ring on the described mandrel successively by the flange riveted.

2. the automobile hub unit of the separable connection of wheel hub medial extremity according to claim 1, it is characterized in that: described pad is provided with interior chamfering towards described forming ends flange corner.

3. the automobile hub unit of the separable connection of wheel hub medial extremity according to claim 2, it is characterized in that: described interior chamfering is the variable curvature curved surface.

4. the automobile hub unit of the separable connection of described wheel hub medial extremity according to claim 1, it is characterized in that: the axis hole medial extremity of described mandrel is equipped with the cylinder needle bearing, and external side end is equipped with deep groove ball bearing.

5. the automobile hub unit of the separable connection of described wheel hub medial extremity according to claim 1, it is characterized in that: described inner ring is provided with angular gear, and the Negotiation speed sensor cooperates described hub-bearing unit is tested the speed.

6. the automobile hub unit of the separable connection of wheel hub medial extremity according to claim 5, it is characterized in that: described angular gear and described inner ring are interference fit.

7. the automobile hub unit of the separable connection of described wheel hub medial extremity according to claim 1, it is characterized in that: described outer ring is provided with raceway in the circular conical surface, and the bottom surface of raceway element line is logarithmic dimpling curve in the described circular conical surface.

8. the automobile hub unit of the separable connection of described wheel hub medial extremity according to claim 1, it is characterized in that: described inner ring is provided with the outer raceway of circular conical surface, and the bottom surface element line of the outer raceway of described circular conical surface is asymmetric dimpling curve.

9. the automobile hub unit of the separable connection of described wheel hub medial extremity according to claim 1 is characterized in that: be equipped with sealing member between the both sides stomidium of described inner ring and outer ring.

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