DE202016105937U1 - Suspension axle and motor vehicle - Google Patents

Abstract

Suspension axle (100) for a motor vehicle (102), comprising: - two linkage elements (104) for the pivotable connection of wheels (116) of the motor vehicle (102) to a supporting structure of the motor vehicle (102); - A connecting element (112), by means of which the link elements (104) are force-transmittingly interconnected, wherein the connecting element (112) is at least partially formed of a plastic material.

Description

The present invention relates to a suspension axle, which is used in particular in a motor vehicle.

The present invention has for its object to provide a suspension axle, which is simple in construction and allows the production of a motor vehicle with low mass.

This object is achieved in that the chassis axle for a motor vehicle comprises the following:
two link elements for the pivotable connection of wheels of the motor vehicle to a supporting structure of the motor vehicle;
a connecting element, by means of which the link elements are force-transmittingly connected to each other, wherein the connecting element is at least partially formed of a plastic material.

Characterized in that the connecting element is at least partially formed of a plastic material, the suspension axle may preferably have a low mass. In addition, the suspension axle as a whole hereby preferably be simple and inexpensive to produce.

The connecting element is in particular a cross-beam.

Preferably, the connecting element is claimed in the state of use of the motor vehicle to torsion and / or bending.

The connecting element is preferably arranged pivotably together with the link elements on the supporting structure of the motor vehicle.

It can be advantageous if the link elements are formed partially or completely from a metallic material and / or from a plastic material, for example from a fiber-reinforced plastic material.

The link elements can be designed, for example, as injection-molded components or die cast components or 3D printed components.

It can be provided that the connecting element and the link elements are materially and / or positively connected with each other.

In particular, it can be provided that the connecting element and the link elements are connected to one another by means of an adhesive connection and / or a screw connection and / or a riveted connection.

Alternatively or additionally, a frictional connection of the link elements may be provided with the connecting element.

It may be advantageous if the connecting element and / or the link elements comprise one or more inserts, to which fasteners for connecting the link elements engage with the connecting element and / or are fixed.

The inserts are in particular borders of passage openings, for example to allow the passage and fixing of screws and / or rivets.

The inserts are in particular formed from a metallic material.

Preferably, the inserts are embedded in a plastic material, in particular a fiber-reinforced plastic material, the link elements and / or the connecting element.

It may be favorable if the connecting element comprises a rod-shaped and / or shell-shaped main body.

The main body is provided in particular with a stabilizing structure.

A rod-shaped configuration of the base body is to be understood in particular as meaning that a length of the base body significantly exceeds its width and / or thickness (depth), for example by a factor of at least approximately 3, preferably at least approximately 5.

Under a shell-like configuration of the body is to be understood in particular that this is open on one side only and surrounds an interior substantially five-sided.

The open side of the bowl-shaped main body is preferably a side which extends over an entire length of the main body away.

In particular, a length of the main body is an extension thereof in a horizontal vehicle transverse direction when the connecting element is mounted in a motor vehicle.

It may be favorable if the base body is formed from an organic sheet. An organic sheet is in particular a thin, flat and / or fiber-reinforced plastic component.

In particular, an organic sheet has a material thickness of at most approximately 10 mm, for example at most approximately 5 mm.

The main body can be produced in particular by a transfer molding process.

In one embodiment of the invention, it may be provided that the stabilization structure is an injection-molded component and / or a transfer-molding component or comprises an injection-molded component and / or a transfer-molding component.

The stabilizing structure may in particular be produced independently of the main body or together with it.

In particular, the stabilization structure can be produced spatially and / or temporally together with the base body and / or separately from the base body.

It may be favorable if the stabilizing structure is injection-molded onto the basic body, in particular in a transfer molding process together with a basic body formed from organic sheet.

The connecting element, in particular the stabilizing structure of the connecting element, preferably comprises or is formed from a long-fiber-reinforced plastic material. Under long fiber reinforced plastic material is to be understood in particular that reinforcing fibers of the plastic material in the finished component at least have a length of several millimeters.

The reinforcing fibers are in particular glass fibers, carbon fibers and / or aramid fibers.

The connecting element, in particular the main body and / or the stabilizing structure, is preferably made of a long fiber reinforced thermoplastic.

Inserts in the connecting element and / or in the link elements are preferably introduced and / or fixed during the shaping of the connecting element and / or the link elements, in particular of the base body of the connecting element. For example, the inserts are encapsulated with plastic material.

However, it can also be provided that the inserts are subsequently introduced into the connecting element and / or the link elements after the production of the connecting element and / or the link elements.

The link elements are preferably trailing arms or semi-trailing arms.

The chassis axle according to the invention is particularly suitable for use in a motor vehicle, in particular a passenger car or truck.

The present invention therefore also relates to a motor vehicle, in particular a passenger car or truck, the vehicle comprising:
a supporting structure;
a plurality of wheels, which are mounted on at least one suspension axle, in particular at least one suspension axle according to the invention, on the supporting structure.

The motor vehicle according to the invention preferably has one or more of the features and / or advantages described in connection with the chassis axle according to the invention.

It may be favorable if the motor vehicle comprises one or more drive motors, in particular electric motors.

In each case a drive motor is preferably assigned in each case to a wheel.

The drive motor of each wheel is preferably arranged on or integrated into a link element of the chassis axle.

In particular, it can be provided that a housing for receiving the drive motor is formed at least in sections by a link element.

An electric motor is in particular a synchronous machine or asynchronous machine.

In particular, a bell construction of the drive motor and / or a drive motor may be provided with an external rotor.

A rotor is preferably arranged radially outward with respect to the stator.

It may be favorable if the drive motor comprises two stator units, whereby in particular integration of the drive motor into the wheel becomes possible.

A crossbeam for a chassis axle can be produced, for example, as follows:
Providing a rod-shaped and / or shell-shaped base body;
Injection of a plastic material to the base body for producing a stabilizing structure of the cross-beam.

It may be favorable if the base body is formed from an organic sheet.

The plastic material for producing the stabilizing structure is in particular a long-fiber-reinforced thermoplastic material.

It may be favorable if in a single tool a) a, in particular plate-shaped, base material of the base body is converted to produce the base body and b) the stabilizing structure is injection-molded onto the base body.

In particular, it can be provided that an organic sheet is inserted into the tool, for example after a previous heating of the organic sheet.

Subsequently, the organic sheet is formed in the tool and / or by means of the tool, preferably by closing the mold formed as a tool. Subsequently, material of the stabilizing structure is injected and brought into a desired shape by means of a pressing process and / or connected to the base material of the base body, in particular the organic sheet.

The connecting element may further comprise a plurality of shell-shaped and / or rod-shaped base bodies, which in particular are connected together to enclose a cavity. The cavity in particular comprises the stabilizing structure.

The plurality of base bodies are in particular thermoplastic composite shells made of a thermoplastic polymer system.

By means of the plurality of basic body in particular closed profiles can be produced.

A profile cross-section of a profile preferably has a small width in relation to its height.

The stabilizing structure is or comprises in particular a rib structure and / or honeycomb structure.

Preferably, the stabilizing structure comprises a plurality of webs and / or walls, which are in particular all aligned substantially parallel to one another and / or have at least one common extension direction. A material thickness preferably does not provide an extension direction.

Reinforcing fibers of the stabilizing structure preferably have an average length of less than 15 mm, for example less than 10 mm.

The stabilizing structure and the one or more base bodies and / or the base bodies with one another are preferably connected to one another in a form-fitting and / or material-locking manner, for example by thermoplastic welding at contact surfaces.

Fiber reinforced plastic material may include, for example, carbon fibers and / or glass fibers. Furthermore, a hybridization of the two fiber types can be provided.

In particular, for optimizing the rigidity of the connecting element, carbon fibers are preferably aligned substantially parallel to a longitudinal axis of the connecting element (horizontal transverse axis of the motor vehicle).

The carbon fibers are arranged in particular at a maximum distance from a longitudinal central axis of the connecting element.

A torsional softness preferably results from the use of glass fibers, which are aligned in particular transversely to the longitudinal axis of the connecting element.

A Hauptentformungsrichtung of the connecting element, that is, a direction in which two tool parts of a mold for producing the connecting element are moved relative to each other, is preferably aligned parallel to a vehicle longitudinal axis of the motor vehicle.

Alternatively, it may be provided that the main demolding of the connecting element is oriented perpendicular to the vehicle longitudinal axis and / or vertically.

For connecting a plurality of basic bodies of the connecting element, in particular a frictional connection, positive connection and / or material connection can be provided, for example a plastic welded connection and / or a tongue and groove connection can be provided.

Further preferred features and / or advantages of the invention are the subject of the following description and the drawings of exemplary embodiments.

In the drawings show:

1 a schematic perspective view of a suspension axle, in which two link elements are provided, which are connected to a cross-beam with each other;

2 another schematic perspective view of the suspension axle 1 ;

3 a schematic front view of the suspension axle 1 ;

4 a schematic plan view from above on the chassis axle 1 ;

5 a schematic section through the chassis axle along the line 5-5 in 3 ;

6 a schematic perspective view of an alternative embodiment of a connecting element;

7 a schematic perspective view of an alternative embodiment of link elements;

8th to 10 various schematic sectional views of alternative embodiments of a connecting element.

Identical or functionally equivalent elements are provided with the same reference numerals in all figures.

One in the 1 to 5 illustrated embodiment of a whole with 100 designated chassis axle comes especially in motor vehicles 102 for use. motor vehicles 102 are in particular passenger cars or trucks.

The suspension axle 100 in particular comprises two link elements 104 pivotally mounted on a supporting structure (not shown) of the motor vehicle 102 are arranged.

The handlebar elements 104 include in particular connection points 106 for pivotal mounting of the entire chassis axle 100 on the supporting structure of the motor vehicle 102 ,

The handlebar elements 104 are in particular trailing arm 108 or semi-trailing arm 110 and serve the connection between the supporting structure of the motor vehicle 102 with (not described in detail) wheel carriers of the chassis axle 100 ,

The handlebar elements 104 are with a connecting element 112 connected with each other.

The connecting element 112 is in particular a crossbeam 114 , which differ from a handlebar element 104 to the other handlebar element 104 extends.

The crossbar 114 is preferably in common with the handlebar elements 104 pivotable relative to the supporting structure of the motor vehicle.

In particular, preferably no direct connection between the cross-beam 114 and the supporting structure of the motor vehicle 102 intended.

In the state of use of the motor vehicle 102 becomes the crossbeam 114 claimed in particular to torsion and / or bending.

The suspension axle 100 further comprises two wheels rotatably mounted on the wheel carriers 116 and in particular a stabilizer 118 for additional coupling of the two wheels 116 together.

Furthermore, the chassis axle includes 100 preferably two drive motors 120 , which in particular as electric motors 122 are formed.

The drive motors 120 are in particular in the handlebar elements 104 integrated.

For example, each is a drive motor 120 in a housing 124 arranged, the housing 124 in particular in the link element 104 integrated or part of the handlebar element 104 is.

Finally, there are two spring damper legs 126 provided, which in each case on the one hand on one of the link elements 104 and on the other hand on the supporting structure of the motor vehicle 102 attack and the resilient and damped down the suspension axle 100 to serve on the supporting structure.

In particular, each is a spring damper leg 126 in each case a link element 104 assigned.

By using one as a crossbeam 114 trained connecting element 112 for connecting the link elements 104 together can the suspension axle 100 preferably be simple and at the same time compared to conventional suspension axles 100 have a reduced mass, which ultimately also the mass of the motor vehicle 102 Total can be reduced.

The connecting element 112 is preferably formed of a plastic material to a in the To achieve lower mass compared to conventional metallic materials.

A concrete example of an advantageous connecting element 112 is in 6 shown.

The connecting element 112 in particular comprises a main body 128 which has a stabilizing structure 130 is provided.

The main body 128 is in particular rod-shaped and / or cup-shaped.

Preferably, the base body surrounds 128 an interior 132 of the connecting element 112 essentially five-sided.

The stabilizing structure 130 is especially in the interior 132 of the basic body 128 arranged.

The connecting element 112 further preferably comprises one or more attachment sites 134 for fixing the connecting element 112 on the handlebar elements 104 ,

The attachment points 134 are in particular passage openings in the body 128 ,

In particular, the attachment points 134 through inserts 136 in the main body 128 formed, or bordered by the same.

The main body 128 is formed in particular of a fiber-reinforced, in particular textile-reinforced, plastic material.

The stabilizing structure 130 is preferably also formed of a fiber reinforced plastic material.

The inserts 136 are preferably formed of a metallic material.

The connecting element 112 according to the in 6 illustrated embodiment can be prepared, for example, as follows:
A base material of the main body 128 , which is in particular an endless fiber-reinforced organic sheet, is preferably heated and introduced into a mold.

In this mold and / or by means of this mold, the base material is reshaped to the cup-shaped and / or rod-shaped configuration of the body 128 to achieve.

At the same time and / or subsequently, in particular in the same tool, preferably the stabilizing structure 130 manufactured, in particular by injection molding.

The molding tool preferably has a complementary to the stabilizing structure 130 formed structure, which with a starting material of the stabilizing structure 130 is filled.

The starting material, in particular fiber-reinforced thermoplastic material, is preferably attached to the base body 128 molded so that the stabilizing structure 130 by the Anspritzvorgang and / or a subsequent pressing process cohesively with the body 128 is connected. Alternatively or additionally, a positive connection between the base body 128 and the stabilizing structure 130 be provided, for example, by partial injection molding of the body 128 ,

Incidentally, the in 6 illustrated embodiment of the connecting element 112 in terms of structure and function with in the 1 to 5 illustrated embodiment, so that reference is made to the above description in this respect.

In 7 is an alternative embodiment of link elements 104 shown.

These handlebar elements 104 are in particular formed as metallic components, which are preferably produced or implemented in a casting process or in a process of additive manufacturing.

The handlebar elements 104 also include access points 106 as well as the wheels 116 facing end region 138 for fixing the wheel carrier.

The handlebar elements 104 also form housing 124 for the drive motors 120 ,

As 7 it can be seen, include the link elements 104 preferably also attachment points 134 , which in particular with the attachment points 134 of in 6 illustrated connecting element 112 Correspond to a stable connection between the handlebar elements 104 and the connecting element 112 to be able to produce. In particular, in this case a screw connection and / or rivet connection in the region of the attachment points 134 be provided.

The attachment points 134 are at the in 7 illustrated embodiment of the link elements 104 arranged in at least approximately horizontal direction in a row next to each other.

The connecting element 112 according to the in 6 illustrated embodiment is then in particular to the handlebar elements 104 determinable that the interior 132 down or up (with respect to the direction of gravity) is open.

In an alternative embodiment (not shown) of the link elements 104 can be provided that the attachment points 134 the link elements 104 are arranged adjacent in at least approximately vertical direction, in particular arranged in a row. The interior 132 of the connecting element 112 is then in particular with respect to a direction of travel of the motor vehicle 102 open to the front or to the rear.

Incidentally, the in 7 illustrated embodiment of the link elements 104 in terms of structure and function with in the 1 to 5 illustrated embodiment, so that reference is made to the above description in this respect.

In the 8th to 10 are different variants of fasteners 112 shown schematically.

The connecting elements 112 according to the 8th to 10 In this case, they can be used, in particular, as an alternative to the variants of connecting elements described above 112 Find use.

According to 8th is provided an open profile, that is, the interior 132 of the connecting element 112 which is five-sided from the main body 128 surrounded, is open to one side.

The stabilizing structure 130 is therefore particularly unilaterally freely accessible.

According to 9 to 10 closed profiles are provided.

9 provides that two main body 128 connected to each other, wherein the stabilizing structure 130 preferably between the two basic bodies 128 is included. The interior 132 is therefore closed.

The basic body 128 the in 9 illustrated embodiment of the connecting element 112 are preferably both substantially C-shaped and facing each other with the side open in the cross-section, to ultimately in particular a substantially oval cross-section of the connecting element 112 to achieve.

A connecting element 112 according to the in 10 embodiment shown also comprises two in cross section C-shaped main body 128 ,

The basic body 128 are open in the same direction, so that in essence a C-shaped cross-section of the entire connecting element 112 results.

In a border area 140 are the two main body 128 preferably connected to each other, for example, welded together.

A the interior 132 forming intermediate space between the basic bodies 128 is in particular with the stabilizing structure 130 filled.

At the edge 140 in which the basic body 128 For example, a mixed laminate of glass fiber reinforced plastic and / or carbon fiber reinforced plastic may be provided.

A back area 142 one or both main body 128 , which in particular between the two edge areas 140 extends, is designed in particular as a pure glass fiber reinforced plastic laminate.

Incidentally, the votes in the 8th to 10 illustrated embodiments of the connecting element 112 in terms of structure and function with in the 1 to 5 or the in 6 illustrated embodiment, so that reference is made to the above description in this respect.

LIST OF REFERENCE NUMBERS

100

chassis axle

102

motor vehicle

104

link element

106

connecting point

108

Trailing arm

110

trailing arm

112

connecting member

114

crossbeam

116

wheel

118

stabilizer

120

drive motor

122

electric motor

124

casing

126

Spring-damper strut

128

body

130

stabilization structure

132

inner space

134

fastening point

136

insert

138

end

140

border area

142

back

Claims (12)

Suspension axle ( 100 ) for a motor vehicle ( 102 ), comprising: - two link elements ( 104 ) for the pivotable connection of wheels ( 116 ) of the motor vehicle ( 102 ) to a supporting structure of the motor vehicle ( 102 ); A connecting element ( 112 ), by means of which the link elements ( 104 ) are connected to one another in a force-transmitting manner, wherein the connecting element ( 112 ) is at least partially formed of a plastic material. Suspension axle ( 100 ) according to claim 1, characterized in that the connecting element ( 112 ) a cross-beam ( 114 ). Suspension axle ( 100 ) according to one of claims 1 or 2, characterized in that the link elements ( 104 ) are formed in sections or completely of a metallic material and / or of a plastic material, for example of a fiber-reinforced plastic material. Suspension axle ( 100 ) according to one of claims 1 to 3, characterized in that the connecting element ( 112 ) and the link elements ( 104 ) are cohesively and / or positively connected with each other. Suspension axle ( 100 ) according to one of claims 1 to 4, characterized in that the connecting element ( 112 ) a rod-shaped and / or shell-shaped basic body ( 128 ), which in particular has a stabilizing structure ( 130 ) is provided. Suspension axle ( 100 ) according to claim 5, characterized in that the basic body ( 128 ) is formed from an organic sheet. Suspension axle ( 100 ) according to one of claims 5 or 6, characterized in that the stabilizing structure ( 130 ) is an injection molding component and / or a transfer molding component or comprises an injection molding component and / or a transfer molding component. Suspension axle ( 100 ) according to claim 7, characterized in that the stabilizing structure ( 130 ) to the main body ( 128 ) is injected. Suspension axle ( 100 ) according to one of claims 5 to 8, characterized in that the connecting element ( 112 ), in particular the stabilizing structure ( 130 ), comprises or is formed from a long fiber reinforced plastic material. Suspension axle ( 100 ) according to one of claims 1 to 9, characterized in that the link elements ( 104 ) Trailing arm ( 108 ) or semi-trailing arm ( 110 ) are. Motor vehicle ( 102 ), in particular passenger cars or lorries, comprising: - a supporting structure; - several wheels ( 116 ), which via at least one landing gear axle ( 100 ) are mounted according to one of claims 1 to 10 on the supporting structure. Motor vehicle ( 102 ) according to claim 11, characterized in that the motor vehicle ( 102 ) one or more drive motors ( 120 ), in particular electric motors ( 122 ), wherein in each case a drive motor ( 120 ) each one wheel ( 116 ), wherein the drive motor ( 120 ) of each wheel ( 116 ) on a link element ( 104 ) of the chassis axle ( 100 ) is arranged or integrated in the same.

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