DE212021000507U1 - A lightweight composite push rod - Google Patents

Abstract

Lightweight composite push rod, characterized in that it comprises a peripheral layer reinforcing component (11) at the outermost periphery and a long fiber reinforced thermoplastic composite material or a short fiber reinforced thermoplastic composite material injected into the inner part of the peripheral layer reinforcing component (11) and combined with the peripheral layer reinforcing component (11). , wherein the peripheral layer reinforcing component (11) is surrounded at both ends by a metal steel sleeve (12), the metal sleeve (12) being provided with a rubber-metal ball joint (13), and wherein a long fiber-reinforced thermoplastic composite material or a short fiber-reinforced thermoplastic composite material between the peripheral layer reinforcing component (11) and the metal steel sleeve (12) is injected; and wherein the peripheral layer reinforcing component (11) is a continuous, circumferentially closed, monolithic structure made by winding and pressing the continuous fiber reinforced thermoplastic composite material in the form of a strip.

Description

Technical area:

The present invention relates to a push rod, and more particularly to a lightweight composite push rod.

Technical background:

A push rod is an auxiliary element widely used in vehicle suspension, comprising a rod body with rod heads at both ends, the rod head being provided with a support shaft connected to the twin axles of the vehicle to support longitudinal or lateral forces of the vehicle as well as forces and moments in other directions to ensure a defined movement relationship between the wheels and the body, to give the vehicle good movement characteristics, to prevent excessive lateral roll of the body when cornering and to improve the balance of the vehicle.

In order to reduce fuel consumption and exhaust emissions in vehicles, the lightweight design of vehicles is currently being pursued with great emphasis, which is why lightweight push rods have also been developed. The invention patent no. CN201510739066.7 For example, entitled “Method for lightweighting a push rod and a lightweight push rod,” uses a polymer material for both the rod body and the core shaft of the elastic ball joint and sets the opposite sides of the rod body into sides with first interrupted grooves. The first interrupted grooves include a plurality of sub-grooves along the length of the rod body, and a plurality of convex bars are provided on the bottom surface of each sub-groove so that each sub-groove is divided into a plurality of small grooves by the plurality of convex bars. Through the invention, the weight of the push rod can be reduced as much as possible while meeting the requirements for the use of the push rod, so that the requirements for the low weight of the push rod are met.

Another patent application with the number CN201510735238.3 entitled “Application of fiber-reinforced thermoplastic composite material in the molding and manufacturing of automobile parts” refers to the use of long fiber-reinforced thermoplastic composite material and continuous fiber-reinforced thermoplastic composite materials for the production of lightweight automobile parts.

None of the above patents mention using a lighter shear bar by first forming a perimeter layer reinforcing component. Therefore, an alternative method of producing a push rod with better performance and structure is proposed.

Content of the invention:

The present invention addresses the current problem of improving the performance of lightweight push rods and provides a lightweight composite push rod, wherein a lightweight composite push rod with a peripheral layer reinforcing component is formed by using continuous fibers to provide a continuous, Closed irregularly shaped perimeter layer reinforcing component to preform to provide external support that improves the tensile strength of the push rod.

The problem is solved by: a lightweight composite push rod includes a peripheral layer reinforcing component at the outermost periphery and a long fiber reinforced thermoplastic composite material or a short fiber reinforced thermoplastic composite injected into the inner part of the peripheral layer reinforcing component and combined with the peripheral layer reinforcing component, the peripheral layer reinforcing component at both ends of a metal steel sleeve, the metal sleeve being provided with a rubber-metal ball joint, and wherein a long fiber reinforced thermoplastic composite material or a short fiber reinforced thermoplastic composite material is injected between the peripheral layer reinforcing component and the metal steel sleeve; wherein the circumferential layer reinforcing component is a continuous, circumferentially closed, monolithic structure made by winding and pressing continuous fiber-reinforced thermoplastic composite material in the form of a strip.

Further, the thickness of the long fiber reinforced thermoplastic composite material or short fiber reinforced thermoplastic composite material injected between the peripheral layer reinforcing component and the metal steel sleeve is 0-5 mm.

Furthermore, the injection-molded long fiber-reinforced thermoplastic composite material or short fiber-reinforced thermoplastic composite material in which the peripheral layer reinforcement com The edge area in contact with the component has a winding structure.

Further, the long-fiber-reinforced thermoplastic composite material or the short-fiber-reinforced thermoplastic composite material that is injected into the peripheral layer reinforcing component is formed as a lattice structure.

Furthermore, the tendons of the lattice structure are formed in the same direction as the load transmission path of the push rod.

Furthermore, the tendons of the lattice structure are aligned at an angle of 45° to the center line of the two metal sleeves.

Furthermore, a recess is provided in the outer circumference of the metal sleeve, along which the long fiber-reinforced thermoplastic composite or the short fiber-reinforced thermoplastic composite flows during injection molding between the metal sleeve and the peripheral layer reinforcing component, whereby the metal sleeve and the peripheral layer reinforcing component are connected.

Furthermore, the rubber-metal ball joint consists from the outside to the inside of a jacket, a rubber vulcanization body and a mandrel, the rubber vulcanization body vulcanizing the mandrel and the jacket into a unit.

1. 1. Die vorliegende Erfindung verwendet eine kontinuierliche Umfangsschicht aus endlosem faserverstärktem thermoplastischem Verbundmaterial in Form eines Bandes, das zunächst mit einer kontinuierlichen, am Umfang geschlossenen Umfangsschicht der Verstärkung als umschließendes Strukturelement der gesamten Schubstange gewickelt wird, und füllt dann die Umfangsschicht der Verstärkung mit langfaserverstärktem thermoplastischem Verbundmaterial oder kurzfaserverstärktem thermoplastischem Verbundmaterial durch Spritzgießen, dieses Verfahren bildet eine Schubstange mit überlegener Leistung und hoher Festigkeit, die in der Lage ist, größeren Zugkräften standzuhalten Das Ergebnis ist eine hochfeste Schubstange, die größeren Zugkräften standhalten kann, ohne leicht zu reißen.
2. 2. Durch die Anordnung der Umfangsschichtverstärkungskomponente am äußersten Rand der Schubstange reicht die Umfangsschichtverstärkungskomponente aus, um die Festigkeit der Schubstange zu gewährleisten, so dass eine leichtgewichtige innere Gitterstruktur leicht erreicht werden kann, ohne dass bei der Konstruktion der Gitterstruktur viel Rücksicht auf die Unterstützung der Spannungen und Lasten genommen werden muss, denen die Schubstange ausgesetzt ist.
3. 3. Durch die Steuerung der Dicke des Kunststoffs zwischen der Umfangsschichtverstärkungskomponente und der Metallstahlhülse auf 0-5 mm vermeidet die Erfindung den fehlerhaften Spritzgießprozess, der durch die übermäßige Dicke der Kunststoffwand verursacht wird, und verbessert so die Ermüdungsleistung der Schubstange insgesamt.
4. 4. Durch die vorliegende Erfindung wird die Kontaktfläche zwischen den beiden Materialien vergrößert, indem auf dem langfaserverstärkten thermoplastischen Verbundmaterial oder dem kurzfaserverstärkten thermoplastischen Verbundmaterial im Randbereich, der mit der Umfangsschichtverstärkungskomponente in Berührung kommt, eine U-förmige Umhüllung ausgebildet wird, wodurch die Festigkeit der Fusionsgrenzfläche zwischen den beiden unterschiedlichen Materialien weiter erhöht wird, die Fusionsgrenzfläche weniger anfällig für Ablösungen ist und somit die Gesamtleistung der Schubstange verbessert wird.
5. 5. Die vorliegende Erfindung verbessert die Druck- und Scherfestigkeit der Schubstange, indem die Richtung der Stäbe der Gitterstruktur innerhalb der

The beneficial effects of the present invention are:

1. 1. The present invention uses a continuous peripheral layer of endless fiber-reinforced thermoplastic composite material in the form of a tape, which is first wrapped with a continuous peripherally closed peripheral layer of reinforcement as an enclosing structural member of the entire push rod, and then fills the peripheral layer of reinforcement with long fiber-reinforced thermoplastic Composite material or short fiber reinforced thermoplastic composite material by injection molding, this process forms a push rod with superior performance and high strength, capable of withstanding larger tensile forces. The result is a high-strength push rod that can withstand larger tensile forces without cracking easily.
2. 2. By arranging the peripheral layer reinforcing component at the outermost edge of the push rod, the peripheral layer reinforcing component is sufficient to ensure the strength of the push rod, so that a lightweight inner lattice structure can be easily achieved without paying much attention to supporting stresses in the design of the lattice structure and loads to which the push rod is exposed.
3. 3. By controlling the thickness of the plastic between the peripheral layer reinforcing component and the metal steel sleeve to 0-5mm, the invention avoids the faulty injection molding process caused by the excessive thickness of the plastic wall, thereby improving the overall fatigue performance of the push rod.
4. 4. The present invention increases the contact area between the two materials by forming a U-shaped envelope on the long fiber reinforced thermoplastic composite material or the short fiber reinforced thermoplastic composite material in the edge area that comes into contact with the peripheral layer reinforcing component, thereby increasing the strength of the fusion interface between the two different materials is further increased, the fusion interface is less prone to separation and thus the overall performance of the push rod is improved.
5. 5. The present invention improves the compressive and shear strength of the push rod by changing the direction of the bars of the lattice structure within the

Perimeter layer reinforcement component is designed in the same direction as the load transmission path to which the push rod is exposed.

Illustrations:

• 1 shows a schematic representation of the structure of the push rod according to the first embodiment of the present invention;
• 2 1 shows a schematic representation of the structure of the peripheral layer reinforcing component according to the first embodiment of the present invention;
• 3 shows a schematic representation of the structure of the steel sleeve according to the first embodiment of the present invention;
• 4 1 shows a schematic diagram of the structure of the rubber-metal ball joint according to the first embodiment of the present invention;

List of reference symbols:

1. Push rod; 11. Perimeter layer reinforcement component; 12. Metal steel sleeve; 121. recess; 13. Rubber-metal ball joint; 132. Rubber vulcanization body; 133. Thorn; 14. Lattice structure; 15. Winding structure;

Examples:

The present invention is described in more detail below in conjunction with the accompanying figures. The accompanying figures are for exemplary purposes only and represent schematic, non-physical drawings only and are not to be construed as limiting the present invention. Certain portions of the accompanying figures have been omitted, enlarged or reduced in size to better illustrate embodiments of the invention and do not represent the dimensions of the actual product. It will be understood by those skilled in the art that certain known structures and their descriptions may be omitted from the accompanying figures.

Example 1:

A lightweight composite push rod, as in 1 until 4 is shown, wherein the peripheral layer reinforcing component 11 is surrounded at both ends by a metal steel sleeve 12, wherein the metal sleeve 12 is provided with a rubber-metal ball joint 13, and wherein a long fiber-reinforced thermoplastic composite material or a short fiber-reinforced thermoplastic composite material between the peripheral layer reinforcing component 11 and the metal steel sleeve 12 is injected. The long fiber reinforced thermoplastic composite material or the short fiber reinforced thermoplastic composite material injected into the peripheral layer reinforcing component 11 is formed as a lattice structure, with the tendons of the lattice structure being formed in the same direction as the load transmission path of the push rod. As in 2 As shown, the peripheral layer reinforcing component 11 is a closed ring structure of continuous fiber-reinforced thermoplastic composite material that is wound and pressed into shape. Due to the continuous integrity of the formed material, the resulting push rod, when used as a peripheral structure to wrap the interior, has a much higher tensile strength, meeting both low weight and high strength requirements. Therefore, when the interior of the push rod is injection molded with long fiber reinforced thermoplastic composite material or short fiber reinforced thermoplastic composite material, the support of the tension and load to which the push rod 1 is exposed does not need to be particularly considered, so that it can be designed as a lattice structure 14 to further to achieve ease. At the same time, the tendons of the lattice structure 14 are formed in the same direction as the load transmission path of the push rod 1 to improve the compressive and shear strength of the push rod 1 and thus ensure the overall performance of the push rod 1. In use, the push rod 1 is exposed to three main types of loads: tensile, compressive and torsional loads. Tensile and compressive loads are transmitted along the length of the product, and the longitudinal and circumferential placement of the continuous fiber reinforced thermoplastic composite material allows it to withstand both tensile and compressive loads. In the case of torsional loads, the resistance is mainly ensured by the grid structure 14 in the middle.

When the product is subjected to torsion, the tensile strength of this less plastic composite material is less than the compressive and shear strength, and the deformation will be less and less during the torsion process and finally drawn off at an oblique angle of about 45 ° to the center line of the two metal steel sleeves 12 become. Thus, if the method permits, the grid structure 14 can be arranged at an angle of approximately 45 ° to the center line, i.e. H. so that the direction of the rods coincides with the direction of load transfer to improve the torsional strength of the push rod 1.

As in 4 shown, the rubber-metal ball joint 12 consists from the inside to the outside of a mandrel 133, a rubber vulcanization body 132 and a jacket 131, the rubber vulcanization body 132 vulcanizing the mandrel 133 and the jacket 131 into a unit.

After the peripheral layer reinforcing component 11 is molded, it is taken out and put into the injection mold, a metal steel sleeve 12 is inserted into the peripheral layer reinforcing component 11 at both ends, and then injected with a long fiber reinforced thermoplastic composite or a short fiber reinforced thermoplastic composite. When removing the peripheral layer reinforcing component 11 from the tool, it is advisable to allow it to cool to avoid deformation during removal and to reheat it before inserting it into the injection mold to avoid excessive temperature differences between the peripheral layer reinforcing component 11 and the injected material to avoid interfering with the fusion between the two could. And when the metal steel sleeve 12 is inserted into the peripheral layer reinforcing component 11, it should be tried to reduce the distance between the metal steel sleeve 12 and the peripheral layer reinforcing component 11 to 0-5mm to avoid errors in the injection molding process due to too thick rubber layer affecting the overall performance the push rod. At the same time, in the construction of the injection mold, the peripheral layer reinforcing component 11 is wrapped in the mold cavity at the end of the connection with the injection molding material, forming a wrapping structure at the edge part of the contact, which forms a U-shaped wrap and increases the contact area between the two materials, thereby making the Strength of the fusion interface between the two different materials is further increased, the fusion interface becomes less susceptible to separation and thus the overall performance of the push rod is improved.

The above embodiments are merely illustrative of the invention and do not constitute a limitation of the invention. Various modifications or modifications may be made by those skilled in the art without departing from the spirit and scope of the invention, and therefore all equivalent technical solutions should also be included within the scope of the Invention fall, which should be limited by the respective claims.

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• CN 2015107390667 [0003]
• CN 2015107352383 [0004]

Claims (8)

Lightweight composite push rod, characterized in that it comprises a peripheral layer reinforcing component (11) at the outermost periphery and a long fiber reinforced thermoplastic composite material or a short fiber reinforced thermoplastic composite material injected into the inner part of the peripheral layer reinforcing component (11) and combined with the peripheral layer reinforcing component (11). , wherein the peripheral layer reinforcing component (11) is surrounded at both ends by a metal steel sleeve (12), the metal sleeve (12) being provided with a rubber-metal ball joint (13), and wherein a long fiber-reinforced thermoplastic composite material or a short fiber-reinforced thermoplastic composite material between the peripheral layer reinforcing component (11) and the metal steel sleeve (12) is injected; and wherein the peripheral layer reinforcing component (11) is a continuous, circumferentially closed, monolithic structure made by winding and pressing the continuous fiber reinforced thermoplastic composite material in the form of a strip. Lightweight push rod made from composite material Claim 1 , characterized in that the thickness of the long fiber reinforced thermoplastic composite material or short fiber reinforced thermoplastic composite material injected between the peripheral layer reinforcing component (11) and the metal steel sleeve (12) is 0-5 mm. Lightweight push rod made from composite material Claim 1 , characterized in that the injection-molded long-fiber-reinforced thermoplastic composite material or short-fiber-reinforced thermoplastic composite material has a winding structure (15) in the edge region in contact with the peripheral layer reinforcement component (11). Lightweight push rod made from composite material Claim 1 , characterized in that the long fiber-reinforced thermoplastic composite material or the short fiber-reinforced thermoplastic composite material, which is injected into the peripheral layer reinforcement component (11), is designed as a lattice structure. Lightweight push rod made from composite material Claim 4 , characterized in that the tendons of the lattice structure are formed in the same direction as the load transmission path of the push rod (1). Lightweight push rod made from composite material Claim 5 , characterized in that the tendons of the lattice structure are aligned at an angle of 45° to the center line of the two metal sleeves. Lightweight push rod made from composite material Claim 1 , characterized in that a recess is provided in the outer circumference of the metal sleeve. Lightweight push rod made from composite material Claim 1 , characterized in that the rubber-metal ball joint consists of a jacket, a rubber vulcanization body and a mandrel from the outside to the inside.

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