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DE-102025106740-B3 - Adjustment arrangement for adjusting an adjustment element of a motor vehicle

DE102025106740B3DE 102025106740 B3DE102025106740 B3DE 102025106740B3DE-102025106740-B3

Abstract

The invention relates to an adjusting arrangement (1) for adjusting an adjusting element (4) of a motor vehicle (5), which has a drive unit (8) comprising a drive train with several interconnected train components (7, 10, 11, 19, 20, 22), wherein the drive unit (8) comprises as train components (7, 10, 11, 19, 20, 22) a hollow cylinder (10) and a rod (11) axially guided therein, wherein the adjusting arrangement (1) comprises a drive spring arrangement (16) with at least one drive spring (17) and a spring retaining element (18), wherein an axially fixed connection exists between the spring retaining element (18) and one of the train components (10, 11) associated with the spring retaining element (18), wherein the spring retaining element (18) projects radially into an axial projection (P) of the material of the drive spring arrangement (16) and is configured to exert an axial force to accommodate the drive spring assembly (16). It is proposed that the spring locking element (18) be formed by a pin element (24) extending along a geometric pin element axis (23), which is configured to absorb the axial force of the drive spring assembly (16) at least in the firing case when assembled, and to axially secure at least one further strand component (7, 19, 20, 22) at least in the direction of action of the spring force to the strand component (10, 11) associated with the spring locking element (18).

Inventors

  • Harald Krüger
  • MICHAEL HITTINGER
  • Florian Fischer

Assignees

  • BROSE FAHRZEUGTEILE SE & CO. KOMMANDITGESELLSCHAFT, BAMBERG

Dates

Publication Date
20260513
Application Date
20250221

Claims (10)

  1. Adjustment arrangement, in particular a spindle drive (2) or gas pressure element (3), for adjusting an adjustment element (4), in particular a flap, of a motor vehicle (5), wherein the adjustment arrangement (1) has two joint parts (7) adjustable relative to each other along a geometric drive axis (6) between a retracted position and an extended position for transmitting linear drive movements to the motor vehicle (5), each joint part forming a drive connection (9) with a motor vehicle-side counter-joint part (15) for coupling to the adjustment element (4) on the one hand and to the motor vehicle (5) on the other, wherein the adjustment arrangement (1) has a motorized or non-motorized drive unit (8), wherein the drive unit (8) has a drive train with several drive-technically coupled train components (7, 10, 11, 19, 20, 22) in order to transmit a force introduced into the drive connections (9), wherein the drive unit (8) comprises train components (7, 10, 11, 19, 20, 22) a hollow cylinder (10) and a rod (11) axially guided therein, wherein one of the joint parts (7) is axially fixedly coupled to the hollow cylinder (10) and the other of the joint parts (7) is axially fixedly coupled to the rod (11), wherein the adjusting arrangement (1) has a drive spring arrangement (16) with at least one drive spring (17) which acts on the two joint parts (7) by providing an axial spring force, wherein the adjusting arrangement (1) has a spring locking element (18), wherein in the assembled state there is an axially fixed connection between the spring locking element (18) and one of the string components (10, 11) associated with the spring locking element (18), wherein the spring locking element (18) projects radially into an axial projection (P) of the material of the drive spring arrangement (16) and is configured to absorb an axial force of the drive spring arrangement (16), characterized in this respect . that the spring locking element (18) is formed by a pin element (24) extending along a geometric pin element axis (23), which is arranged to absorb the axial force of the drive spring arrangement (16) at least in the case of firing when assembled and to axially secure at least one further of the string components (7, 19, 20, 22) at least in the direction of action of the spring force to the string component (10, 11) associated with the spring locking element (18).
  2. Adjustment arrangement according to Claim 1 , characterized in that the pin element (24) is arranged to axially secure at least one further of the strand components (7, 19, 20, 22) to the strand component (10, 11) associated with the spring locking element (18) against the direction of action of the spring force.
  3. Adjustment arrangement according to Claim 1 or 2 , characterized in that a further strand component (7, 19, 20, 22), which is axially secured to the strand component (10, 11) associated with the spring locking element (18) at least in the direction of action of the spring force, is one of the joint parts (7), preferably that the joint part (7) is axially secured to the strand component (10, 11) associated with the spring locking element (18) both in and against the direction of action of the spring force, and/or that a further strand component (7, 19, 20, 22), which is axially secured to the strand component (10, 11) associated with the spring locking element (18) at least in the direction of action of the spring force, is a housing tube (19, 20), preferably that the housing tube (19, 20) is axially secured to the strand component (10, 11) associated with the spring locking element (18) either exclusively in the direction of action of the spring force is or is axially secured both in and against the direction of action of the spring force.
  4. Adjustment arrangement according to one of the preceding claims, characterized in that the joint part (7) is attached externally to the string component (10, 11) associated with the spring locking element (18) or is inserted internally into the string component (10, 11) associated with the spring locking element (18).
  5. Adjustment arrangement according to one of the preceding claims, characterized in that the pin element (24) forms a rotation lock in the circumferential direction about the geometric drive axis (6) between the strand component (10, 11) associated with the spring locking element (18) and the respective further strand component (7, 19, 20, 22).
  6. Adjustment arrangement according to one of the preceding claims, characterized in that the pin element (24) is secured against rotation about the geometric pin element axis (23) in the first transverse passage (25) and/or in the second transverse passage (26) and/or third transverse passage (27).
  7. Adjustment arrangement according to one of the preceding claims, characterized in that the pin element (24) is a cotter pin, a round rod or a polygon, for example a square or hexagonal pin.
  8. Adjustment arrangement according to one of the preceding claims, characterized in that the adjustment arrangement (1) comprises a drive housing with comprising an outer housing tube (20) and an inner housing tube (19) which telescopically slide into each other when adjusted between the retracted position and the extended position, preferably that a radially inwardly projecting, in particular collar-shaped, housing tube section (21) of the inner housing tube (19) or of the outer housing tube (20) is held axially between the drive spring assembly (16) and the spring locking element (18), further preferably that the housing tube section (21) is held axially between the drive spring (17) and the locking section, in particular between the drive spring (17) and the spring force transmission part or between the spring force transmission part and the locking section.
  9. Adjustment arrangement according to one of the preceding claims, characterized in that the adjustment arrangement (1) has a drive housing with a single housing tube (22) which, during adjustment between the retracted position and the extended position, telescopically slides into the hollow cylinder (10), preferably that a radially inwardly projecting, in particular collar-shaped, housing tube section (21) of the single housing tube (22) is held axially between the drive spring arrangement (16) and the spring locking element (18), further preferably that the housing tube section (21) is held axially between the drive spring (17) and the locking section, in particular between the drive spring (17) and the spring force transmission part or between the spring force transmission part and the locking section.
  10. Adjustment arrangement according to one of the preceding claims, characterized in that the adjustment arrangement (1) is designed as a spindle drive (2), wherein the strand component (7, 10, 11, 19, 20, 22) forming the hollow cylinder (10) is a spindle guide tube (13) with a spindle nut (14) axially fixed and rotationally fixed thereto, and the strand component (7, 10, 11, 19, 20, 22) forming the rod (11) is a spindle (12) meshing with the spindle nut (14), in particular designed from solid material, or, that the adjustment arrangement (1) is designed as a gas pressure element (3), wherein the strand component (7, 10, 11, 19, 20, 22) forming the hollow cylinder (10) is a gas-filled gas pressure element cylinder and the strand component (7, 10, 11, 19, 20, 22) is a gas pressure element piston rod axially guided therein, or that the adjusting arrangement (1) is designed as a purely mechanical spring-driven, in particular purely linearly adjustable, piston-cylinder arrangement, wherein the strand component (7, 10, 11, 19, 20, 22) forming the hollow cylinder (10) is a pressureless cylinder and the strand component (7, 10, 11, 19, 20, 22) forming the rod (11) is a piston rod axially guided therein.

Description

The present invention relates to an adjustment arrangement, in particular a spindle drive or a gas pressure element, for adjusting an adjustment element, in particular a flap, of a motor vehicle according to the preamble of claim 1. The term "adjusting element" is to be understood broadly in this context. It includes, for example, flaps such as tailgates, trunk lids, hoods, front hoods, side doors, cargo hatches or the like, or sliding doors of a motor vehicle. Various drive types are known for adjusting such an adjusting element, for example, a tailgate. Both motor-driven and motorless adjusting arrangements are known. A motor-driven adjusting arrangement is, for example, a spindle drive that uses a drive unit with a drive motor to drive a spindle-spindle nut gear as a feed mechanism to generate linear drive movements. A motorless adjusting arrangement is, for example, a gas pressure element, which has a drive unit with a gas-filled gas pressure element cylinder and a gas pressure element piston rod axially guided therein, i.e., a push rod with a piston at its end. The gas filled in the cylinder is pressurized and thus provides a spring force. The drive unit of the spindle drive or the gas pressure element can also include a drive spring arrangement with at least one drive spring, in particular a helical spring, to assist the drive movements and provide an additional spring force. The known state of the art ( DE 10 2019 128 830 A1 The invention relates to an adjustment arrangement in the form of a gas pressure element. The adjustment arrangement comprises a non-motorized drive unit, which, as drive-related (force- or torque-transmitting) components coupled to one another in a drive train, includes a hollow cylinder, namely a gas-filled gas pressure element cylinder, and a rod axially guided therein, namely a gas pressure element piston rod. For transmitting linear drive movements to the motor vehicle, the adjustment arrangement has two joint parts adjustable relative to each other along a geometric drive axis between a retracted position and an extended position. Each joint part forms a drive connection with a corresponding counter-joint part on the motor vehicle side, for coupling to the adjustment element on the one hand and to the motor vehicle on the other. One joint part is axially fixed to the hollow cylinder, and the other joint part is axially fixed to the rod. A drive spring arrangement with a helical compression spring as the drive spring acts on the two joint parts in the extended position by providing an axial spring force. Hollow cylinder, rod and drive spring assembly are arranged in a drive housing, which here has two telescopically overlapping housing tubes. The housing tubes that axially hold the drive spring between them are made of a plastic material. To prevent the drive spring from being released, for example in the event of a fire, due to damage to one of its axial spring bearings and causing damage outside the adjustment assembly, a spring retaining element catches the rapidly expanding drive spring (so-called "shooting event") and transfers the impact force exerted by the drive spring into a corresponding component of the assembly, to which the spring retaining element is axially fixed. Other situations in which a firing event can occur include an unintentional decoupling of the joint part and counter-joint part, or a breakage of the counter-joint part in the retracted position or in a not fully extended position, whereby the hollow cylinder and rod suddenly spring apart due to the drive spring assembly, as well as icing, in which the two telescoping housing tubes, which hold the drive spring axially between them, are frozen together in the retracted position and initially do not follow the extension movement of the rod relative to the hollow cylinder when extending, but can subsequently separate from each other, whereby the two housing tubes then suddenly spring apart due to the drive spring assembly. Such adjustment arrangements are also known in the prior art from DE 11 2020 003 076 T5 and DE 10 2019 110 221 A1 known. In the known adjustment arrangement, the spring-loaded locking element is a flat metal clip. During assembly, the metal clip is slid radially onto the rod and axially secured by corresponding recesses provided on opposite radial sides of the rod. A challenge lies in ensuring that the lateral recesses do not compromise the structural integrity of the rod, as this could impair operational safety. The invention is based on the problem of designing and further developing the known adjustment arrangement in such a way that further optimization is achieved with regard to operational safety. The above problem is solved by the features of the characterizing part of claim 1. The fundamental consideration is to use a pin element as a spring-loaded locking element instead of a clamp fixed in lateral recesses. A pin element in this sense is an elongated, particularly rod-shaped