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EP-4735771-A1 - BEARING BUSH

EP4735771A1EP 4735771 A1EP4735771 A1EP 4735771A1EP-4735771-A1

Abstract

The invention relates to a bearing bush comprising: a tubular piece (3) extending in an axial direction (x) and enclosing an interior (2), which tubular piece has a rear axial tubular-piece end (4) and a front axial tubular-piece end (5) at which the tubular piece (3) is open at the front; one or more axial securing elements (6, 7, 8, 9); and at least one elastically deformable axial compensation element (10) which is fixedly connected to the tubular piece (3) and is provided in the interior (2) thereof, wherein each axial securing element (6, 7, 8, 9) has a resilient tongue (12) which extends rearwardly at a radial distance from an outer peripheral surface (11) of the tubular piece (3) and is elastically deformable radially inwardly in relation to the outer peripheral surface.

Inventors

  • TATURA, ALFRED

Assignees

  • BOGE Elastmetall GmbH

Dates

Publication Date
20260506
Application Date
20240418

Claims (10)

  1. 1. Bearing bush with a pipe section (3) extending in an axial direction (x) and enclosing an interior space (2), which has a rear axial pipe section end (4) and a front axial pipe section end (5) at which the pipe section (3) is open at the front, one or more axial securing elements (6, 7, 8, 9) and at least one axial compensating element (10) which is firmly connected to the pipe section (3), provided in its interior space (2) and is elastically deformable, characterized in that each axial securing element (6, 7, 8, 9) has a spring tongue (12) which extends rearward at a radial distance from an outer peripheral surface (11) of the pipe section (3) and is elastically deformable radially inward relative to this.
  2. 2. Bearing bush according to claim 1, characterized in that the axial securing elements (6, 7, 8, 9) are arranged uniformly distributed around the outer peripheral surface (11) of the pipe section (3) at a distance from one another.
  3. 3. Bearing bush according to claim 1 or 2, characterized in that the spring tongue (12) of each axial securing element has a tongue root (14) firmly connected to the pipe piece (3) and is provided with a tongue tip (13) facing the rear axial pipe piece end (4).
  4. 4. Bearing bush according to one of the preceding claims, characterized in that the diameter of the outer peripheral surface (11) of the pipe piece (3) is reduced in the region of the spring tongue or spring tongues (12).
  5. 5. Bearing bush according to one of the preceding claims, characterized in that the pipe section (3) comprises at least three axial pipe section sections (16, 17, 18) lying one behind the other in the axial direction (x), of which a front axial pipe section section (18) has a smaller outer diameter than a rear axial pipe section section (16) and a middle axial pipe section section (17) arranged between these axial pipe sections (16, 18) has an outer peripheral surface (19) which tapers from the outer diameter of the rear axial pipe section section (16) to the outer diameter of the front axial pipe section section (18) in the axial direction (x).
  6. 6. Bearing bush according to claim 5, characterized in that the front axial pipe section (18) comprises the axial securing element(s) (6, 7, 8, 9).
  7. 7. Bearing bush according to one of the preceding claims, characterized in that the axial compensating element (10) comprises a central element (21) arranged at a radial distance from the inner circumferential surface (20) of the pipe section (3) and several spaced apart around the central element (21) arranged spokes (22) which extend from the inner peripheral surface (20) of the pipe section (3) to the central element (21) and firmly connect the latter to the pipe section (3).
  8. 8. Bearing bush according to one of the preceding claims, characterized by one or more guide projections (30) which are firmly connected to the pipe section (3) and project radially outwards from its outer peripheral surface (11), each of which forms a guide rib extending in the axial direction (x).
  9. 9. Bearing bush according to claim 8, characterized in that an additional axial securing element (31) is provided in the axial extension of each guide projection (30), which has a spring tongue (32) extending rearwardly at a radial distance from the outer peripheral surface (11) of the pipe section (3) and elastically deformable radially inwardly relative to this.
  10. 10. Pedal device with a bearing structure (25) which has at least one cheek (24) in which a bearing axis receiving hole (27) is provided, in which a bearing axis (28) of a pedal lever (29) is pivotally mounted about a pedal lever axis (P), characterized in that a bearing bush (1) according to one of the preceding claims is introduced into the bearing axis receiving hole (27), in the interior (2) of which the Bearing axis (28) is rotatable about the pedal lever axis (P), wherein the spring tongue (12) of each axial securing element is disengaged from the bearing axis receiving hole (27) on a side of the cheek (24) facing the pedal lever (29) and can be or is supported axially on the cheek (24) with its free end.

Description

Description bearing bushing The invention relates to a bearing bush with a pipe section extending in an axial direction and enclosing an interior space, which has a rear axial pipe section end and a front axial pipe section end at which the pipe section is open at the front, one or more axial securing elements and at least one axial compensation element which is firmly connected to the pipe section, provided in its interior space and is elastically deformable. DE 10 2018 208478 A1 discloses a bearing bush for a pedal device of a motor vehicle with at least one axial securing element for realizing a positive connection with a bearing structure acting in the axial direction of a bearing axis, with at least one axial compensation element for absorbing a tolerance acting in the axial direction of the bearing axis and with at least one radial contact element for compensating a tolerance acting in the radial direction of the bearing axis. The above-mentioned bearing bush has the disadvantage that a positive connection between the Bearing bush and the bearing structure can fail even under loads that are not uncommon in practice. Proceeding from this, the invention is based in particular on the object of developing a bearing bush as mentioned at the outset in such a way that a positive connection between the bearing bush and a bearing structure, brought about by the axial securing element(s), can absorb larger axial loads. This object is achieved according to the invention by a bearing bush according to claim 1. Preferred developments of the invention are given in the subclaims and in the following description. A bearing bush with a pipe section extending in an axial direction and enclosing an interior space, which has a rear axial pipe section end and a front axial pipe section end, at which the pipe section is open at the front, one or more axial securing elements and at least one axial compensation element firmly connected to the pipe section, provided in its interior and elastically deformable, is further developed according to the invention in particular in that each axial securing element has a spring tongue extending rearward, in particular in the axial direction, at a radial distance from an outer peripheral surface of the pipe section and elastically deformable radially inward relative to this outer peripheral surface. If the bearing bush is inserted into a bearing axle receiving hole provided in a cheek of a bearing structure from an outside of the cheek with the front axial pipe section end first in an assembly direction that preferably coincides with the axial direction, each spring tongue is initially elastically deformed radially inwards, since the inner diameter of the bearing axle receiving hole is smaller than the outer diameter of the bearing bush in the area of the undeformed spring tongue(s). If the bearing bush then moves out of the bearing axle receiving hole again with a front pipe section on an inner side of the cheek, each spring tongue snaps radially outwards due to its spring force. If an attempt is now made to pull the bearing bush out of the bearing axle receiving hole again in the opposite direction to the assembly direction, this is prevented by the free end of each spring tongue axially resting on the cheek on the inside. Unwanted disassembly of the bearing bush is therefore not possible without causing damage. Therefore, a positive connection between the bearing bush and the bearing structure achieved by the axial locking element(s) can absorb larger axial loads. The bearing bush and/or the pipe section is preferably assigned a longitudinal axis extending in the axial direction, which runs in particular centrally through the bearing bush and/or through the pipe section and/or through its interior. The interior of the pipe section is, for example, cylindrical or essentially cylindrical. Preferably, the pipe section has an inner circumferential surface, which advantageously delimits the interior, which is in particular cylindrical or substantially cylindrical. Advantageously, the interior of the pipe section and/or a wall of the pipe section, which in particular delimits the interior, and/or the or an inner circumferential surface of the pipe section, which in particular delimits the interior, is rotationally symmetrical or substantially rotationally symmetrical with respect to the or a longitudinal axis, which preferably extends in the axial direction. One or any direction running transversely to the axial direction and/or transversely to the longitudinal axis is referred to in particular as a radial direction. Preferably, a direction running around the longitudinal axis is referred to as a circumferential direction. Advantageously, the expression "at least one" also includes the meaning of "one" or "exactly one". The radial distance is preferably a clear distance. The spring tongue of each axial securing element advantageously delimits a free space with the outer circumferential