Elastomeric bushing

Abstract

The invention relates to an elastomer bushing comprising a longitudinal axis (A), a core (100), an outer sleeve (200) surrounding the core (100) and an elastomer body (300) arranged between the core (100) and the sleeve (200) and elastically connecting the core (100) and the sleeve (200) to each other, wherein the elastomer body (300) forms an elastomer bearing ring (302) which is supported on an inner bearing surface (106) of the core (100) at its inner circumference and on an outer bearing surface (206) of the outer sleeve (200) at its outer circumference, wherein the elastomer bearing ring (302) is a hollow truncated cone.

Description

Technical Field

[0001] This invention relates to an elastomer bushing. Background Technology

[0002] Known elastomeric bushings include a core, an outer sleeve surrounding the core, and an elastomeric body disposed between the core and the sleeve to elastically connect the core and the sleeve to each other. However, known bushings do not have a satisfactory ratio between axial stiffness and radial stiffness. Summary of the Invention

[0003] The task is to find an elastic bushing that can achieve high axial stiffness regardless of torsional deflection.

[0004] This invention relates to an elastomer bushing comprising a longitudinal axis, a core, an outer sleeve surrounding the core, and an elastomer body disposed between the core and the sleeve, elastically connecting the core and the outer sleeve to each other. The elastomer body forms an elastomer support ring, which is supported at its inner circumference on an inner support surface of the core and at its outer circumference on an outer support surface of the outer sleeve, wherein the elastomer support ring is a hollow truncated cone or has a hollow truncated cone shape.

[0005] The hollow truncated cone shape of the elastomeric support ring ensures high axial stiffness regardless of torsional deflection between the core and the sleeve. Furthermore, as a hollow truncated cone, the elastomeric support ring can withstand high axial preload and maintains high axial stiffness even under preload. For example, if the core rotates slightly relative to the outer sleeve, the device remains axially aligned. Therefore, the axial stiffness does not decrease with torsional deflection. Moreover, due to the ring's relatively long circumferential length, it achieves a significant increase in axial stiffness. This is particularly true compared to known elastomeric arms, which are supported between the core and the outer sleeve and, due to their short circumferential length, cannot achieve high axial stiffness or maintain sufficient axial stiffness under torsional deflection.

[0006] The elastomeric support ring can be continuous or uninterrupted in the circumferential direction about the longitudinal axis. With respect to the longitudinal axis, the elastomeric support ring can be a rotating body. This emphasizes independence from the aforementioned torsional deflection. The elastomeric support ring is primarily used to provide axial support for the core and outer sleeve—the elastomeric support ring is an axially operating elastomeric component. At the core, the elastomeric support ring may have a maximum support diameter, and / or at the outer sleeve, it may have a minimum support diameter. The maximum support diameter is the largest support diameter present on the core. The minimum support diameter is the smallest support diameter present on the outer sleeve. The minimum support diameter on the outer sleeve can be equal to or smaller than the maximum support diameter on the core. This results in an axial overlap of these support diameters. The greater this overlap, the greater the axial stiffness of the bushing.

[0007] As a truncated cone, the elastomeric support ring can have a conical outer circumferential surface and / or a conical inner circumferential surface. An imaginary central cone can be conceived within the elastomeric support ring material between the outer and inner circumferential surfaces. This imaginary central cone can define the central diameter of the elastomeric support ring. The outer circumferential surface can be aligned with the outermost support point of the elastomeric support ring. The inner circumferential surface can be aligned with the innermost support point of the elastomeric support ring.

[0008] The elastomeric support ring or its imaginary central cone can be formed at an angle of 40° to 70° with the longitudinal axis, preferably 50° to 60°, and even more preferably 55°. These dimensions have proven to be particularly advantageous in the context of this invention.

[0009] The inner circumferential surface and / or the outer circumferential surface of the elastomeric support ring can be free surfaces. Both surfaces can be exposed to the environment, such as air. The outer diameter of the elastomeric support ring is defined by its outer circumferential surface. The inner diameter of the elastomeric support ring is defined by its inner circumferential surface. As a truncated cone, the central diameter of the elastomeric support ring tapers along the longitudinal axis, preferably between the two support surfaces.

[0010] An elastomeric support ring can be arranged in an elastomeric bushing such that its axial end with a large diameter is supported at the longitudinal center or central region of the elastomeric bushing, and its axial end with a small diameter is supported at the axial end of the elastomeric bushing. The elastomeric support ring may taper toward one of the two axial ends of the elastomeric bushing.

[0011] The inner support surface can be formed on the outer circumference of the core. This reduces the installation space and promotes compressive stress within the elastomer support ring. Compared to tensile stress within the elastomer, compressive stress typically improves the durability of the elastomer bushing. The inner support surface can extend circumferentially around the longitudinal axis, preferably continuously or uninterruptedly, and / or can be annular. The inner support surface can also be conical. This provides better axial support and axial force transmission.

[0012] The outer support surface can be formed on the inner circumference of the outer sleeve. This reduces the installation space and promotes compressive stress within the elastomeric support ring. The outer support surface can extend circumferentially around the longitudinal axis, preferably continuously or uninterruptedly, and / or can be an annular surface. The outer support surface can also be a conical surface. This provides good axial support and the transmission of axial forces.

[0013] The inner and outer support surfaces are offset from each other along the longitudinal axis. This allows the elastomeric support ring to stretch between them, particularly extending longitudinally and expanding radially, promoting compressive stress within the elastomeric support ring. The support surface can simply be the surface supporting the elastomeric support ring.

[0014] The elastomer body can be a single piece. The elastomer body can be bonded to the core and outer sleeve via a material bond (preferably by vulcanization). This material bond also serves to ensure a secure connection in the event of torsional deflection. The elastomer support ring can be bonded to its support surface via a material bond (preferably by vulcanization). This material bond also serves to ensure a secure connection in the event of torsional deflection.

[0015] The core may have blind or through holes along its longitudinal axis. Fasteners (e.g., screws) may engage in / through the corresponding holes. The core may be designed as a single piece, preferably monolithic, thereby reducing the size of the component and optimizing force distribution by reducing the number of component joints. The core may have an axial end face at one of its longitudinal ends and an axial end face at its opposite longitudinal end.

[0016] The core can be formed in two parts. The first part can be a shaft. The shaft can be cylindrical and / or extend over 50% of the longitudinal length of the core, preferably over 70%, and / or have an outer diameter, preferably a continuous and constant outer diameter along the longitudinal axis. One of the axial end faces of the core can be formed by the shaft. Specifically, the shaft can be used to arrange an elastomeric support arm extending radially between the core and the outer sleeve, and can elastically connect the core and the sleeve. Such an elastomeric support arm particularly requires a slender core.

[0017] The elastomeric support arm can be attached to its support surface via a material bond (preferably by vulcanization). The material bond also serves to ensure a secure connection in the event of torsional deflection.

[0018] The second part can be a head. The shaft and the head can be directly adjacent to each other in the longitudinal direction. The head can be the axial end of the core. Therefore, the head can be used to interact with other components. The head can extend within 50% of the longitudinal length of the core, preferably less than 30%, and / or have a maximum outer diameter that is greater than the maximum outer diameter of the shaft. This allows the head to provide greater mounting space for other components. One of the axial end faces of the core can be formed by the head.

[0019] The outer sleeve may have a (first) axial end face at one of its longitudinal ends and a (second) axial end face at its opposite longitudinal end.

[0020] The elastomer bushing may have a transverse center plane. A longitudinal axis may be arranged perpendicular to the transverse center plane. A circumferential direction extends about the longitudinal axis. The longitudinal axis extends longitudinally through the core. The core may be an inner sleeve. A radial direction extends perpendicularly from the longitudinal axis.

[0021] According to an alternative embodiment, the core has (preferably formed) an inner support flange on its outer circumference, on which the elastomeric support ring is supported. The inner support flange extends radially outward from the core. This allows the core to form a good support surface for the elastomeric support ring. The inner support flange may be formed from the head. The inner support flange may extend circumferentially about a longitudinal axis, preferably continuously or uninterruptedly, and / or may be an annular flange. The inner support flange may form an inner support surface, preferably only the inner support flange forms the inner support surface. Technically feasible, the inner support surface extends beyond the inner support flange, and the elastomeric support ring is also supported, for example, on a shaft. The principle is that the ring is supported at some point on the inside.

[0022] According to another alternative embodiment, the inner support surface and / or the inner support flange may taper along the longitudinal axis. This provides good axial support and axial force transmission.

[0023] According to another alternative embodiment, the inner support surface and / or the inner support flange and / or the head and / or groove may be located within the space inside the outer sleeve. This results in a compact length for the core, which also leads to smaller installation space requirements for the core / fastener assembly.

[0024] According to an optional embodiment, the inner support flange is arranged at the axial end of the core, preferably formed by the head. This leaves installation space in the elastomeric bushing between the core and the outer sleeve. It also allows the inner support of the elastomeric support ring to enter the axial end region of the elastomeric bushing.

[0025] According to another alternative embodiment, the core may be an axially retracted core. Therefore, the core may be longitudinally retracted relative to the outer sleeve and / or elastomer body at one of its two axial ends. This results in a compact length of the core, which also leads to smaller installation space requirements for the core / fastener assembly. The following specific embodiments specify the general embodiment in more detail.

[0026] According to an optional embodiment, the axial end face and / or inner support flange and / or head of the core are retracted a certain distance along the longitudinal axis relative to the axial end face of the outer sleeve. This makes the component shorter and requires less installation space. Therefore, the corresponding portion or axial end of the core is arranged within the space inside the outer sleeve. The axial end of the core, on which the axial end face and / or inner support flange and / or head are formed, is thus retracted relative to the corresponding axial end of the outer sleeve, or does not axially protrude outward from the outer sleeve. The axial end face of the outer sleeve may be the first axial end face of the outer sleeve.

[0027] Retraction means that the aforementioned portion of the core is arranged longitudinally closer to the transverse center plane of the elastomer bushing than the axial end face of the outer sleeve.

[0028] According to another alternative embodiment, the core may be an axially projecting core. Therefore, the core may project longitudinally relative to the outer sleeve and / or the elastomer body at one of its two axial ends. The core may be both: an axially retracted core and an axially projecting core. The core may be retracted at one of its axial ends and project at the other axial end. By varying the length of the core, it can be adapted to positioning relative to its interface.

[0029] According to an alternative embodiment, the inner support flange and / or the head forms a groove in the axial end of the core. The groove may be shell-shaped. The groove may lead to a blind hole or a through hole. The groove may be a screw head groove. The screw head (fastener) may be disposed in the groove. This produces a compact length for the core, which also results in less mounting space required for the core / fastener assembly. Another advantage of the groove is that the fastener can be recessed into the core and does not have to rest against a small end face. This makes it much more compact.

[0030] According to another alternative embodiment, the diameter of the groove can be larger than the maximum outer diameter of the shaft portion. This further emphasizes the task allocation of the core portion: the large-diameter head is used for attaching the elastomeric ring and / or arranging fasteners, while the small-diameter shaft portion is used for attaching the elastomeric support arm to have sufficient radial extension.

[0031] According to an optional embodiment, the groove forms a fastener contact surface, wherein the fastener contact surface is recessed along the longitudinal axis relative to the radially outermost support point of the elastomeric support ring at the core and / or relative to the axial end point of the elastomeric support ring. The fastener contact surface may be aligned radially with the inner support surface. Therefore, the seat for the screw (fastener) can be positioned even further inside the elastomeric bushing than the lowermost starting point of the elastomeric support ring. This makes it much more compact. Recession means that the fastener contact surface is arranged longitudinally closer to the transverse center plane of the elastomeric bushing than the outermost support point. On the core, the elastomeric support ring has its maximum outer diameter at the outermost support point. The outermost support point may be positioned on the inner support surface. The outermost support point may be positioned at the maximum support diameter of the elastomeric support ring on the core side. The elastomeric support ring may have an even larger outer diameter at another point (not on the core).

[0032] According to an alternative embodiment, the outer sleeve has (preferably formed) an outer support flange on its inner circumference, on which the elastomeric support ring is supported. The outer support flange extends radially inward from the outer sleeve. This allows the outer sleeve to form a good support surface for the elastomeric support ring. The outer support flange may be formed at the middle third of the length of the elastomeric bushing. The outer support flange may extend continuously or uninterruptedly in the circumferential direction about the longitudinal axis, and / or may be an annular flange. The outer support flange may form an outer support surface, preferably only the outer support flange is formed. Technically feasible, the outer support surface extends beyond the outer support flange. The principle is that the ring is supported at some point on the outer side.

[0033] According to another alternative embodiment, the outer support surface and / or the outer support flange may taper along the longitudinal axis. This provides good axial support and axial force transmission.

[0034] According to another alternative embodiment, the outer support flange may be wedge-shaped in longitudinal section. Therefore, the outer support flange may have a first outer flange surface facing in one axial direction and a second outer flange surface facing in the opposite axial direction. One of the outer flange surfaces may be the outer support surface of the elastomeric support ring. The other outer flange surface may support the elastomeric support arm. This allows the elastomeric support ring to be supported in one axial direction while the elastomeric support arm is supported in the opposite axial direction, thus requiring only a single support (outer support flange) in this configuration.

[0035] According to an optional embodiment, the first axial length of the outer sleeve is equal to or less than the second axial length of the outer sleeve. The first axial length extends parallel to the longitudinal axis between the point at the minimum inner diameter of the outer support flange and the axial end face (second end face) of the outer sleeve, and the second axial length extends parallel to the longitudinal axis between the point at the minimum inner diameter of the outer support flange and the opposite axial end face (first end face) of the outer sleeve. The elastomeric support ring and / or the outer support surface and / or the head are arranged within the second axial length. The elastomeric support ring providing axial support can therefore be positioned deep within the center of the elastomeric bushing. This means that the head can also be arranged within the space inside the outer sleeve, while simultaneously achieving sufficient axial extension of the elastomeric support ring. The total axial length of the outer sleeve can be the sum of the first and second axial lengths. On the outer sleeve, the elastomeric support ring has its minimum inner diameter at the innermost support point. The innermost support point can be positioned on the outer support surface. The innermost support point can be positioned at the minimum support diameter of the elastomeric support ring on the sleeve side. The elastomeric support ring may have an even smaller inner diameter at another point (not on the outer sleeve).

[0036] According to an alternative embodiment, when viewed in longitudinal section, the inner and outer support surfaces are parallel to each other, preferably with the elastomeric support ring or imaginary central cone perpendicular to the extension of each of the two support surfaces. Both support surfaces taper and are aligned in the same direction, with the elastomeric support ring arranged between them. Therefore, this embodiment can withstand high axial preload loading while maintaining a long service life.

[0037] According to another alternative embodiment, the inner support surface and the outer support surface overlap or nearly overlap longitudinally. There may be a radial distance between the outermost support point and the innermost support point. With respect to the radial distance between them, the closer the outermost support point and the innermost support point are, the more progressive the axial stiffness curve, and thus the greater the ability of the elastomer bushing to withstand high axial loads.

[0038] According to an optional embodiment, the elastomer body forms at least two, preferably four, elastomer support arms, which are supported on the core at their inner circumference and on the outer circumference of their outer circumference. The elastomer support arms elastically connect the core and the outer circumference to each other. The arms may be ribs.

[0039] Elastomer support arms, acting as rod-type connections between the core and outer sleeve, enable high radial stiffness. Furthermore, because these arms can have large axial lengths, they allow for a relatively high increase in radial stiffness with minimal impact on torsional stiffness.

[0040] The elastomeric support arms can be continuous or uninterrupted in the axial direction along the longitudinal axis. The elastomeric support arms can be equidistantly arranged around the longitudinal axis to achieve a uniform effect. The elastomeric support arms are primarily used to provide additional radial support for the core and outer sleeve, and are the dominant radially working elastomer components. With the presence of both elastomeric support rings and elastomeric support arms, the aforementioned functional separation can be achieved: by separating the functions of the axially and radially working elastomer components, good adaptability in the radial direction can be preserved. This is based on the fact that in the shear deflection of rubber, tensile and compressive deflection dominate stiffness; when the elastomeric support ring undergoes axial deflection, tensile and compressive deflection dominate, while when the elastomeric support arm undergoes radial deflection, tensile and compressive deflection dominate. Especially with both elastomeric support rings and elastomeric support arms, the ratio between axial and radial stiffness can be easily adjusted. As an arm, each elastomeric support arm can have two opposing outer surfaces. These outer surfaces can be free surfaces.

[0041] This disclosure also includes an embodiment in which the elastomeric support ring is replaced by an elastomeric support arm. In this embodiment, the elastomeric support ring is optional.

[0042] According to another alternative embodiment, the elastomeric support arm is supported on a shaft at its inner circumference, preferably only on the shaft. Concentrating the fastening portion on the inner circumference allows for an arm with the longest possible radial length, as the shaft can remain both narrow and long, especially when a head is present.

[0043] According to another alternative embodiment, each elastomeric support arm extends axially beyond the axial end of the outer sleeve and / or the axial end of the elastomeric body on its inner circumference. Since the elastomeric support arms protrude from within the elastomeric bushing, very long arms can be formed in the axial direction, which further increases radial stiffness. Advantageously, the elastomeric support arms are supported by an outer support flange in a direction opposite to that of the elastomeric support ring. This means that when the elastomeric bushing is axially loaded in the direction that causes tensile stress in the elastomeric support ring, the elastomeric support arms help reduce damage to the elastomeric material.

[0044] According to another alternative embodiment, the elastomeric support arm is supported at its outer circumference on the flangeless inner circumferential surface of the outer sleeve and / or the cylindrical inner circumferential surface of the outer sleeve and / or the outer support flange and / or the elastomeric support ring. Preferably, the elastomeric support arm is supported only thereon. When the elastomeric support arm is supported by the outer support flange, the elastomeric arm can be supported on the outer flange surface. This can further increase axial stiffness, at least in the absence of torsional deflection. When the elastomeric body is integral and has both an elastomeric support ring and an elastomeric support arm, the support arm can be fused into the support ring in the same material.

[0045] According to another alternative embodiment, each elastomer arm may have a material thickness in the circumferential direction that is at most equal to the outer diameter of the core (preferably at most equal to the outer diameter of the shaft). These elastomer arms may also provide a degree of stiffness if relative rotational movement occurs between the core and the outer sleeve.

[0046] According to another alternative embodiment, the inner support flange and / or head may not contain an elastomeric radial arm. The inner support flange and / or head does not support the elastomeric radial arm. In this case, the function of the inner support flange and / or head is to receive the head of a fastener (such as a screw).

[0047] According to an optional embodiment, the axial end face of the elastomeric support arm is inclined at an angle relative to the longitudinal axis, preferably in the range of 85° to 45°, and more preferably 70°. The inclined axial end face not only facilitates adjustment of radial stiffness but also increases axial stiffness. Furthermore, this geometric feature reduces strain on the surface of the axial end face.

[0048] According to optional embodiments

[0049] - The core has an outer diameter, preferably at its axial portion, which is in the range of 0.25 to 0.5 times the outer diameter of the outer sleeve, and / or

[0050] - The inner support flange and / or the head have a maximum outer diameter that is in the range of 0.5 to 0.75 times the outer diameter of the outer sleeve, and / or

[0051] - The outer support flange has a minimum inner diameter that is in the range of 0.4 to 0.8 times the outer diameter of the outer sleeve.

[0052] These proportions have proven highly suitable for arranging the elastomer body disclosed herein, thereby achieving the advantages according to this disclosure. Preferably, the outer diameter of the outer sleeve refers to the outer diameter of the bushing or the outer circumferential surface of the bushing, through which the bushing is secured in the radial direction (e.g., by pressing). It is conceivable that the outer diameter of the outer sleeve does not refer to the radially projecting collar attached to the outer sleeve.

[0053] In summary, a highly advantageous elastomer bushing is disclosed, which possesses the following characteristics: - Compact, because the core can retract. - It can provide a large axial contact surface for the screw because the core can have a groove that can also retract. - It may contain an elastomer body that produces excellent stiffness due to the effect of the elastomer ring. - However, for elastomer arms, it is still possible to have a long and sufficiently long core. Attached Figure Description

[0054] Further features, details, and advantages of the invention will become apparent from the following description of embodiments taken in conjunction with the accompanying drawings. In the drawings: Figure 1 Show along Figure 2 Top view of the elastomer bushing indicated by arrow I. Figure 2 Show along Figure 1 Longitudinal section view of centerline II-II Figure 3 Show along Figure 1 Longitudinal section view of centerline III-III, and Figure 4 Separate views of the elastomer body and core are shown.

[0055] List of reference numerals

[0056] 2. Elastomer bushing

[0057] 100 cores

[0058] 102 Inner Support Flange

[0059] 104 Grooves

[0060] 106 Inner Support Surface

[0061] 108 Fastener contact surface

[0062] 110 Axial end face

[0063] 112 Axial end face

[0064] 114 Shaft

[0065] 116 Head

[0066] 118 Through Hole

[0067] 200 coat sleeve

[0068] 202 External support flange

[0069] 206 External support surface

[0070] 208 First outer flange surface

[0071] 210 Second outer flange surface

[0072] 300 Elastomer Body

[0073] 302 Elastomer Support Ring

[0074] 304 Stainless Steel Elastomer Support Arm

[0075] 306 Outer circumferential surface

[0076] 308 Inner Circumferential Surface

[0077] 310 Imaginary Central Cone

[0078] 312 Outer Surface

[0079] 314 Outer Surface

[0080] A. Longitudinal axis

[0081] a angle

[0082] b angle

[0083] D0 outer diameter

[0084] D1 outer diameter

[0085] D2 outer diameter

[0086] D3 inner diameter

[0087] D4 Maximum support diameter

[0088] D5 Minimum support diameter

[0089] D6 Center Diameter

[0090] D7 Groove diameter

[0091] d1 Distance

[0092] d2 distance

[0093] d3 distance

[0094] E1 First Axial End Face

[0095] E2 Second Axial End Face

[0096] h1 First axial length

[0097] h2 Second axial length

[0098] M Material Thickness

[0099] P1 Outermost support point

[0100] P2 Innermost support point

[0101] P3 point

[0102] Q. Lateral center plane

[0103] R radial

[0104] U circumferential direction Detailed Implementation

[0105] In the accompanying drawings, identical or corresponding elements are each denoted by the same reference numerals and therefore will not be described again unless appropriate. Features already described will not be described again to avoid repetition and apply to all elements having the same or corresponding reference numerals, unless explicitly excluded. The disclosure contained throughout this specification can be applied to the same parts having the same reference numerals or the same part names, with necessary modifications. Positional details in the description (e.g., top, bottom, side, etc.) also refer to the drawings directly described and shown, and are analogous to the new position when the position changes. Furthermore, individual features or combinations of features extracted from the different embodiments shown and described may also represent independent, inventive solutions or solutions according to the invention.

[0106] The radial direction R extends perpendicularly to the longitudinal axis A. The circumferential direction U extends around the longitudinal axis A, and a transverse central plane Q is arranged such that its normal vector lies on the central longitudinal axis A.

[0107] Figures 1 to 4 The single elastomer bushing 2 and its components are depicted in different views. Figure 2 The main components are shown, while Figure 3 The main focus is on showing dimensions and spatial relationships. However, the corresponding reference numerals may be transferred to their respective other figures, and are not necessarily included in those other figures as they are visually detectable.

[0108] The elastomeric bushing 2 includes a longitudinal axis A and a core 100, with the longitudinal axis A extending longitudinally through the core 100. The elastomeric bushing 2 includes an outer sleeve 200 surrounding the core 100 and an elastomeric body 300 disposed between the core 100 and the sleeve 200, elastically connecting the core 100 and the sleeve 200 to each other. The elastomeric body 300 forms an elastomeric support ring 302, which is supported at its inner circumference on an inner support surface 106 of the core 100 and at its outer circumference on an outer support surface 206 of the outer sleeve 200. The elastomeric support ring 302 is a hollow truncated cone.

[0109] The elastomeric support ring 302 is continuous in the circumferential direction U. At the core 100, the elastomeric support ring 302 has a maximum support diameter D4, and at the outer sleeve 200, it has a minimum support diameter D5. The elastomeric support ring 302 has a conical outer circumferential surface 306 and a conical inner circumferential surface 308.

[0110] In the material of the elastomeric support ring located between the outer circumferential surface 306 and the inner circumferential surface 308, an imaginary central cone 310 is conceivable. This imaginary central cone 310 defines the central diameter D6 of the elastomeric support ring 302. The central diameter D6 tapers along the longitudinal axis A. Both the inner circumferential surface 306 and the outer circumferential surface 308 are free surfaces.

[0111] The elastomeric support ring 302 is arranged in the elastomeric bushing 2 such that its axial end with a larger diameter is supported in the longitudinal central region of the elastomeric bushing 2, and its axial end with a smaller diameter is supported at the axial end of the elastomeric bushing 2. Therefore, the elastomeric support ring 302 tapers towards one of the two axial ends of the elastomeric bushing 2. The elastomeric support ring 302, or its imaginary central cone 310, forms an angle b with the longitudinal axis A.

[0112] An inner support surface 106 is formed on the outer circumference of the core 100. The inner support surface 106 extends continuously around the longitudinal axis A in the circumferential direction U and is a conical surface. An outer support surface 206 is formed on the inner circumference of the outer sleeve 200 and extends continuously around the longitudinal axis A in the circumferential direction U. The outer support surface 206 is also a conical surface. The inner support surface 106 and the outer support surface 206 are offset from each other along the longitudinal axis A.

[0113] The elastomer body 300 is a single piece and is connected to the core 100 and the outer sleeve 200 by means of material bonding.

[0114] The core 100 has a through hole 118 extending along a longitudinal axis A. Fasteners (e.g., screws) can engage through the through hole 118. The core 100 is designed as a single piece, wherein the core 100 has an axial end face 110 at one of its longitudinal ends and an axial end face 112 at its opposite longitudinal end.

[0115] The core 100 is formed in two parts. The first part is a shaft 114. The shaft 114 is cylindrical and extends beyond 50% of the longitudinal length of the core 100, and has a continuous and constant outer diameter D1 along the longitudinal axis A. One of the axial end faces 110 is formed by the shaft 114.

[0116] The second part can be a head 116. The shaft portion 114 and the head 116 are directly adjacent to each other in the longitudinal direction. The head 116 is the axial end of the core 100. The head extends for less than 50% of the longitudinal length of the core 100 and has a maximum outer diameter D2, which is greater than the maximum outer diameter D1 of the shaft portion 114. Another axial end face 112 of the core 100 is formed by the head 116.

[0117] The core 100 forms an inner support flange 102 on its outer circumference. The elastomeric support ring 302 is supported and abuts against the inner support flange 102. The inner support flange 102 extends radially outward from the core 100 and is formed by the head 116. The inner support flange 102 extends continuously around the longitudinal axis A in the circumferential direction U and is an annular flange. Only the inner support flange 102 forms an inner support surface 106. The inner support surface 106 and the inner support flange 102 taper along the longitudinal axis A. The inner support flange 102 is located at the axial end of the core 100.

[0118] The core 100 is an axially retracted core. The core 100 is longitudinally retracted at one of its two axial ends relative to the outer sleeve 200. The axial end face 112 and inner support flange 102 of the core 100 are retracted a distance d1 along the longitudinal axis A relative to the first axial end face E1 of the outer sleeve 200. The corresponding portion or axial end of the core 100 is thus arranged within the space inside the outer sleeve 200. The axial end face 112 and inner support flange 102 are formed on the core 100, and the axial end of the head 106 is thus retracted relative to the corresponding axial end of the outer sleeve 200 and does not protrude axially from the outer sleeve 200. The core 100 is also an axially protruding core. The core 100 protrudes longitudinally at its other axial end relative to the outer sleeve 200 and / or the elastomer body 300.

[0119] The inner support flange 102 forms a shell-shaped groove 104 in the axial end of the core 100. The groove 104 passes into the through hole 118 and is a screw head groove. The diameter D7 of the groove 104 is larger than the (maximum) outer diameter D1 of the shaft 114.

[0120] The groove 104 forms a fastener contact surface 108, wherein the fastener contact surface 108 is retracted by a distance d2 along the longitudinal axis A relative to the radially outermost support point P1 of the elastomeric support ring 302 at the core 100. The fastener contact surface 108 is aligned with the inner support surface 106 in the radial direction R.

[0121] On the core, the elastomeric support ring 302 has its maximum outer diameter at the outermost support point P1. The outermost support point P1 is located on the inner support surface 106 and at the maximum support diameter D4 of the elastomeric support ring 302 on the core side.

[0122] The outer sleeve 200 forms an outer support flange 202 on its inner circumference, and the elastic support ring 302 is supported and abutted against it.

[0123] An outer support flange 202 extends radially inward from the outer sleeve 200. The outer support flange 200 is formed at the middle third of the length of the elastomer bushing. This middle third defines the central region. The outer support flange 202 extends continuously around the longitudinal axis A in the circumferential direction U and is an annular flange. The outer support flange 202 forms a portion of the outer support surface 206. The outer support surface 206 and the outer support flange 202 taper along the longitudinal axis A.

[0124] The outer support flange 202 is wedge-shaped in longitudinal section. Therefore, the outer support flange 202 has a first outer flange surface 208 facing one axial direction and a second outer flange surface 210 facing the opposite axial direction. One of the outer flange surfaces 208 is an outer support surface 206 for supporting the elastomeric support ring 302. The other outer flange surface 210 supports four elastomeric support arms 304, as will be described later.

[0125] The outer sleeve 200 has a total axial length (h1 + h2). The first axial length h1 of the outer sleeve 200 is equal to or less than the second axial length h2. The first axial length h1 extends parallel to the longitudinal axis A between the minimum inner diameter D3 of the outer support flange 202 or between point P3 at the minimum inner diameter D3 and the second axial end face E2 of the outer sleeve 200. The second axial length h2 extends parallel to the longitudinal axis A between the minimum inner diameter D3 of the outer support flange 202 or between point P3 at the minimum inner diameter D3 and the opposite first axial end face E1 of the outer sleeve 200. As shown, the elastomeric support ring 302 and the outer support surface 206 are arranged within the second axial length h2. On the outer sleeve 200, the elastomeric support ring 302 has its minimum inner diameter at the innermost support point P2. The innermost support point P2 is located at the outer support surface 206. The innermost support point P2 is located at the minimum support diameter D5 of the elastic support ring 302 on the sleeve side.

[0126] When viewed in longitudinal section, the inner support surface 106 and the outer support surface 206 are parallel to each other. The elastomeric support ring 302 and the imaginary central cone 310 are perpendicular to the extension of each of the two support surfaces 106 and 206.

[0127] The inner support surface 106 and the outer support surface 206 do not overlap longitudinally. In other words, the outermost support point P1 and the innermost support point P2 have a radial distance d3 between them. The outer circumferential surface 306 is aligned with the outermost support point P1. The inner circumferential surface 308 is aligned with the innermost support point P2.

[0128] The elastomer body 300 forms the four elastomer support arms 304, which are supported at the core 100 at their inner circumference, and particularly only at their shaft 114. The elastomer support arms 304 are supported at the outer circumference of the outer sleeve 200 at the flangeless, cylindrical inner circumferential surface, the outer support flange 206, and the elastomer support ring 302. Since the elastomer body 300 is a single piece and includes the elastomer support ring 302 and the elastomer support arms 304, therefore... Figure 3 As shown by the dashed lines, these support arms are fused into the support ring 302 in the same material. The elastomeric support arms 304 elastically connect the core 100 and the outer sleeve 200 to each other.

[0129] exist Figures 1 to 4 In the embodiments shown, the elastomeric support ring 302 and the elastomeric support arm 304 are also understood as alternatives, alternatives or supplements to each other.

[0130] The elastomeric support arm 304 is continuous axially along the longitudinal axis A. The elastomeric support arms 304 are arranged equidistantly around the longitudinal axis A. Each elastomeric support arm 304 may have two opposing outer surfaces 312, 314. The outer surfaces 312, 314 may be free surfaces.

[0131] Each elastomeric support arm 304 extends beyond the axial end of the outer sleeve 200 in the axial direction A on its inner circumference. The elastomeric support arm 304 is supported by the outer support flange 202 in a direction opposite to the support direction of the elastomeric support ring 302.

[0132] Each elastomer arm has a material thickness M in the circumferential direction U, which is at most equal to the outer diameter of the core 100, preferably at most equal to the outer diameter D1 of the shaft 114. The inner support flange 102 and the head 116 do not contain the elastomer radial arm 304. The axial end face of the elastomer support arm 304 is inclined at an angle α relative to the longitudinal axis A.

[0133] The outer diameter D1 of the core 100 is in the range of 0.25 to 0.5 times the outer diameter D0 of the outer sleeve 200. The outer diameter D2 of the inner support flange 102 is in the range of 0.5 to 0.75 times the outer diameter D0 of the outer sleeve 200. The inner diameter D3 of the outer support flange 202 is in the range of 0.4 to 0.8 times the outer diameter D0 of the outer sleeve 200.

[0134] This invention is not limited to one of the embodiments described above, but can be modified in many different ways. All features and advantages derived from the specification and drawings, including design details, spatial arrangements, and process steps, whether present individually or in various combinations, may be essential features of this invention. All combinations of at least two features disclosed in the specification and / or drawings fall within the scope of this invention. To avoid duplication, features disclosed according to an apparatus should also be considered as disclosed according to a method and are claimable. Similarly, features disclosed according to a method should also be considered as disclosed according to an apparatus and are claimable.

Claims

1. An elastomer bushing (2), the elastomer bushing (2) comprising: - Longitudinal axis (A), - Core (100), - The outer sleeve (200) surrounding the core (100), and - An elastomer body (300) is disposed between the core (100) and the sleeve (200) and elastically connects the core (100) and the sleeve (200) to each other. - Wherein, the elastomer body (300) forms an elastomer support ring (302), the elastomer support ring (302) is supported on the inner support surface (106) of the core (100) at its inner circumference, and is supported on the outer support surface (206) of the outer sleeve (200) at its outer circumference. - Wherein, the elastomeric support ring (302) is a hollow truncated cone.

2. The elastomer bushing (2) according to claim 1, characterized in that, The core (100) has, and preferably has, an inner support flange (102) formed on its outer circumference, and the elastomeric support ring (302) is supported on the inner support flange.

3. The elastomer bushing (2) according to claim 2, characterized in that, The inner support flange (102) is arranged at the axial end of the core (100).

4. The elastomer bushing (2) according to claim 2 or 3, characterized in that, The axial end face (110) of the core (100) and / or the inner support flange (102) are retracted by a distance (d1) along the longitudinal axis (A) relative to the axial end face (E1) of the outer sleeve (200).

5. The elastomeric bushing (2) according to any one of claims 2 to 4, characterized in that, The inner support flange (102) forms a groove (104) in the axial end of the core (100).

6. The elastomer bushing (2) according to claim 5, characterized in that, The groove (104) forms a fastener contact surface (108), wherein the fastener contact surface (108) is retracted by a distance (d2) along the longitudinal axis (A) from the radially outermost support point (P1) of the elastomeric support ring (302) at the core (100).

7. The elastomer bushing (2) according to any one of the preceding claims, characterized in that, The outer sleeve (200) has, and preferably has, an outer support flange (202) on its inner circumference, and the elastomeric support ring (302) is supported on the outer support flange.

8. The elastomer bushing (2) according to any one of the preceding claims, characterized in that, - The first axial length (h1) of the outer sleeve (200) is equal to or less than the second axial length (h2) of the outer sleeve (200). - The first axial length (h1) extends parallel along the longitudinal axis (A) between the minimum inner diameter (D3) of the outer support flange (202) or a point (P3) located at the minimum inner diameter (D3) and the axial end face (E2) of the outer sleeve (200), and - The second axial length (h2) extends parallel along the longitudinal axis (A) between the minimum inner diameter (D3) or the point (P3) located at the minimum inner diameter (D3) and the opposite axial end face (E1) of the outer sleeve (200). - The elastomeric support ring (302) and / or the outer support surface (206) are arranged within the second axial length (h2).

9. The elastomer bushing (2) according to any one of the preceding claims, characterized in that, When viewed in longitudinal section, the inner support surface (106) and the outer support surface (206) are parallel to each other, and preferably, the elastomeric support ring (302) is perpendicular to each extension of the two support surfaces (106, 206).

10. The elastomer bushing (2) according to any one of the preceding claims, characterized in that, The elastomer body (300) forms at least two, preferably four, elastomer support arms (304), which are supported on the core (100) at their inner circumference and on the outer sleeve (200) at their outer circumference.

11. The elastomer bushing (2) according to claim 10, characterized in that, The axial end face of the elastomeric support arm (304) is inclined at an angle (a) relative to the longitudinal axis (A), preferably in the range of 85° to 45°, more preferably 70°.

12. The elastomer bushing (2) according to any one of the preceding claims, characterized in that, - The core (100) has an outer diameter (D1), preferably located at the shaft portion (114) of the core, the outer diameter being in the range of 0.25 to 0.5 times the outer diameter (D0) of the outer sleeve (200), and / or - The inner support flange (102) has a maximum outer diameter (D2), which is in the range of 0.5 to 0.75 times the outer diameter (D0) of the outer sleeve (200), and / or - The outer support flange (202) has a minimum inner diameter (D3) that is in the range of 0.4 to 0.8 times the outer diameter (D0) of the outer sleeve (200).

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