Suspension bushing without middle framework and automobile suspension

Abstract

The utility model relates to the technical field of suspension bushings, in particular to a suspension bushing without a middle framework and an automobile suspension. The suspension bushing comprises a framework, wherein the outer framework is of an annular structure; the inner framework is of an annular structure arranged in the outer framework in a sleeving manner; the rubber sleeve is arranged between the outer framework and the inner framework, the end face of the rubber sleeve is an arc concave face which is concave inwards in the axial direction of the rubber sleeve, a gap between the inner framework and the outer framework is densely filled with the rubber sleeve in the Z direction, arc-shaped grooves are formed in the two ends of the rubber sleeve in the X direction, and the two ends of each arc-shaped groove in the arc direction are of a fillet structure. A plurality of rubber protrusions are arranged on the side wall, close to the inner framework, of the arc-shaped groove in the rubber sleeve. The space between the inner framework and the outer framework is densely filled with the rubber sleeve in the Z direction, the Z-direction rigidity is guaranteed, the X-direction rigidity is reduced through the arc-shaped grooves and the rubber protrusions on the two sides in the X direction, the deformation space and the X-direction limiting capacity are provided, and the arc concave faces and the fillet structures can release concentrated stress during deformation to avoid strain and tearing.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of suspension bush, specifically refers to a suspension bush without middle framework and automobile suspension. BACKGROUND

[0002] The bush of automobile suspension is used for connecting swing arm and turnover support, and provides support and side deflection performance to absorb vehicle vibration and improve comfort, the existing bush sets a layer of middle framework between outer framework and inner framework to improve the Z-direction strength of the bush, and rubber deformation is arranged between the layers of framework to absorb vibration, but the rigidity of the middle framework is large, and the vehicle vibration easily aggravates the wear and tear of rubber, so that the damping performance of the bush is reduced and abnormal sound is produced. SUMMARY

[0003] The utility model discloses a suspension bush without middle framework and automobile suspension to solve the technical problems in the prior art.

[0004] The utility model discloses the technical scheme is: a suspension bush without middle framework, the bush includes,

[0005] The outer framework is annular structure.

[0006] The inner framework is annular structure that is sleeved in the outer framework.

[0007] The rubber sleeve is arranged between the outer framework and the inner framework, the end face of the rubber sleeve is a circular arc concave surface that is concave in the axial direction, the rubber sleeve is densely filled in the gap between the inner framework and the outer framework in the Z-direction, the two ends of the rubber sleeve in the X-direction are provided with arc-shaped grooves, the two ends of the arc-shaped grooves along the arc-shaped direction are circular corner structures, and a plurality of rubber protrusions are arranged on one side wall of the rubber sleeve close to the inner framework.

[0008] Further, the axial ends of the inner framework protrude from the end face of the outer framework, and the inner framework is sleeved with a buffer side pad abutting against the end face of the outer framework.

[0009] Further, the buffer side pad is provided with a tapered hole, the buffer side pad is sleeved on the end portion of the inner framework and abuts against the end face of the outer framework, and the tapered hole abuts against the circular arc concave surface of the rubber sleeve.

[0010] Further, the axial end portion of the tapered hole and the side edge of the buffer side pad are arc chamfer structures.

[0011] Further, the buffer side pad includes a nylon layer and a polyurethane layer fixed on one side of the nylon layer, and the nylon layer is used for abutting against the end face of the outer framework.

[0012] Further, one end of the rubber protrusion close to the inner framework is large, and the other end far away from the inner framework is small.

[0013] Further, the middle section of the inner skeleton in the axial direction is radially thickened to form a bulge structure.

[0014] Further, the rubber sleeve is vulcanized and fixed to the inner skeleton.

[0015] In another aspect, the utility model provides a kind of automobile suspension, including turnover support, swing arm and the suspension liner of the utility model, turnover support is fixedly connected with inner skeleton, swing arm is fixedly connected with outer skeleton, arc-shaped groove is located at the both ends of X when suspension liner is installed in turnover support.

[0016] Further, the swing arm is provided with a mounting hole, and the outer skeleton of the suspension liner is fixed in the mounting hole;Two opposite mounting plates are provided on the turnover support, and the two ends of the inner skeleton are abutted and fixed between the two mounting plates by bolting.

[0017] Further, the two mounting plates are provided with insertion holes, and the inner skeleton is located between the two mounting plates and is fixedly connected with the turnover support by bolting the bolt through the inner skeleton and the insertion holes on both sides and the bolt nut.

[0018] Further, the inner wall of the inner skeleton is provided with a first anti-rotation surface, and the turnover support is provided with a limiting surface for abutting the anti-rotation surface.

[0019] Further, the bolt is provided with a limiting surface for abutting the anti-rotation surface;The hole wall of the insertion hole is provided with a second anti-rotation surface for abutting the limiting surface to limit the rotation of the bolt.

[0020] Further, the outer diameter of the cushion side pad of the suspension liner is greater than the outer diameter of the outer skeleton, and the two sides are abutted with the mounting plate and the swing arm side, respectively.

[0021] The beneficial effects of the utility model include: 1, the rubber sleeve is provided between the outer skeleton and the inner skeleton to provide radial support, and absorbs vibration by deformation, and the gap between the inner skeleton and the outer skeleton is filled densely in Z direction by the rubber sleeve, which can enhance the Z direction stiffness;The arc-shaped groove at both ends of the rubber sleeve in X direction can reduce the stiffness of the rubber sleeve in X direction, while providing space for Z direction compression to deform the arc-shaped groove, improving comfort;The fillet structure of the arc-shaped groove can disperse and release the concentrated stress generated at the end of the arc-shaped groove when the rubber sleeve deforms, preventing fatigue tearing caused by stress concentration of the rubber sleeve deformation;Through the plurality of rubber protrusions, the arc-shaped groove outer wall can be abutted during the deformation process of the rubber sleeve, the stiffness in X direction can be reduced and maintained, and the service life can be prolonged;The arc-shaped concave surface of the end surface of the rubber sleeve can solve the problem of stress concentration and fatigue tearing of the rubber sleeve when the cab rolls over;

[0022] 2, the two ends of the inner skeleton protrude from the outer skeleton, which is convenient for installing the cushion side pad, and the outer skeleton end surface can be abutted by the cushion side pad to avoid direct contact with the turnover support when the outer skeleton rolls over to produce noise;

[0023] 3. The buffer side pads are fitted onto the outer side of the inner frame through tapered holes to facilitate contact with the concave surface of the arc, thus positioning the buffer side pads. This makes the contact area between the rubber sleeve and the inner frame longer, resulting in better stress release and improved durability.

[0024] 4. The nylon layer of the buffer side pad has a certain degree of hardness and wear resistance, which can effectively relieve the pressure of the outer frame end face on the polyurethane layer when tilting and the crushing deformation damage caused by long-term use. The polyurethane layer can effectively reduce friction noise.

[0025] 5. The rubber protrusion is larger at one end and smaller at the other end near the inner skeleton. When the rubber protrusion deforms and abuts against the outer wall of the arc groove, the limiting force gradually increases, which absorbs vibration while ensuring a certain X-direction stiffness.

[0026] 6. The radial thickening and bulging of the middle section of the inner skeleton can enhance the overall stiffness of the suspension bushing, especially the Z-direction stiffness.

[0027] 7. The rubber sleeve and the inner skeleton are vulcanized and fixed together, ensuring a reliable connection that is not easily separated;

[0028] 8. The automobile suspension involved in this utility model makes full use of the structural characteristics of the suspension bushing provided by this utility model; the inner skeleton of the conventional bushing is hinged to the tilting support through a pin, and the inner skeleton and the pin move and produce abnormal noise when the vehicle vibrates; the tilting support and the swing arm of this utility model are fixedly connected to the inner skeleton and the outer skeleton respectively, and the inner skeleton and the tilting support will not move relative to each other and produce abnormal noise when vibrating and tilting.

[0029] 9. The suspension bushing is fixed to the swing arm and the tilting support in a simple way. After the suspension bushing is fixed in the mounting hole, the two mounting plates form an inner opening and are bolted to the inner frame, which is simple to install.

[0030] 10. The buffer side pads abut against the mounting plate and the side of the swing arm on both sides respectively, which can buffer the sway vibration of the tilting arm and prevent abnormal noise.

[0031] The suspension bushing involved in this utility model has a simple overall structure. The rubber bushing is densely filled between the inner and outer skeletons in the Z direction to ensure Z-direction stiffness. The arc grooves on both sides in the X direction reduce X-direction stiffness and provide deformation space. The arc concave surface and rounded corner structure can release concentrated stress during deformation to avoid strain and tearing. When it has a vibration damping effect, the rubber protrusion can provide a certain X-direction limiting ability. Attached Figure Description

[0032] Figure 1 : A schematic diagram of the suspension bushing without a central frame in the installed state;

[0033] Figure 2 A three-dimensional structural diagram of a suspension bushing without a central frame;

[0034] Figure 3: front view schematic diagram of suspension bush without middle frame;

[0035] Figure 4 : sectional view schematic diagram of suspension bush without middle frame;

[0036] Figure 5 : perspective structure schematic diagram of buffer side pad;

[0037] Figure 6 : sectional view schematic diagram of buffer side pad;

[0038] Wherein: 1 - suspension bush; 11 - outer frame; 12 - rubber sleeve; 120 - arc-shaped groove; 121 - rubber protrusion; 122 - round corner; 123 - circular arc concave; 13 - inner frame; 2 - buffer side pad; 21 - nylon layer; 22 - polyurethane layer; 23 - conical hole; 3 - bolt; 4 - nut; 5 - turnover support; 51 - mounting plate; 6 - swing arm. DETAILED DESCRIPTION

[0039] The embodiments of the present application are described in detail below, wherein identical or similar reference numerals represent identical or similar elements throughout the present application. The embodiments described below are exemplary, the drawings are not drawn to scale, and are intended to explain the present application, and cannot be understood as a limitation on the present application.

[0040] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0041] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0042] The present application will be further described in detail below with reference to the drawings and specific embodiments.

[0043] The utility model relates to a kind of suspension bushings 1 without middle framework, overall structure is simple, rubber sleeve 12 is provided between outer framework 11 and inner framework 13 to provide radial support, and through deformation absorption vibration, through the dense filling of rubber sleeve 12 in Z direction (vehicle height direction) The gap between inner framework 13 and outer framework 11, Z direction stiffness can be enhanced;Arc-shaped groove 120 located at the both ends of rubber sleeve 12 in X direction (vehicle length direction) It can reduce the stiffness of rubber sleeve 12 in X direction, while providing the space of Z direction compression to the deformation of arc-shaped groove 120, improve damping performance (comfortability);The fillet 122 structure of arc-shaped groove 120 can disperse and solve the concentrated stress generated at the end of arc-shaped groove 120 of rubber sleeve 12 when rubber sleeve 12 deforms, to prevent rubber sleeve 12 from being torn by deformation stress concentration fatigue;Through multiple rubber protrusions 121, the outer wall of arc-shaped groove 120 can be abutted in the deformation process of rubber sleeve 12, the stiffness in X direction is reduced and maintained, the service life is prolonged, and the comfortability is improved;The circular arc concave surface 123 of the end surface of rubber sleeve 12 can solve the problem of stress concentration and fatigue tearing of rubber sleeve 12 when cab rolls.

[0044] A kind of suspension bushings 1 without middle framework, specifically, as shown in Figures 1-6 The utility model discloses a kind of suspension bushings 1 without middle framework, specifically, as shown in Figure 1, including outer framework 11, inner framework 13 and rubber sleeve 12;The outer framework 11 is annular structure;Inner framework 13 is annular structure that is set in outer framework 11;Inner framework 13 and outer framework 11 are all hard structure, can adopt alloy;Rubber sleeve 12 is located between outer framework 11 and inner framework 13, the end surface of rubber sleeve 12 is circular arc concave surface 123 that is concave in its axial direction, rubber sleeve 12 is densely filled in the gap between inner framework 13 and outer framework 11 in Z direction, for providing Z direction stiffness;Two ends of rubber sleeve 12 in X direction are provided with arc-shaped groove 120, the both ends of arc-shaped groove 120 along arc-shaped direction are fillet 122 structure, the side wall of rubber sleeve 12 located close to inner framework 13 in arc-shaped groove 120 is provided with multiple rubber protrusions 121, rubber protrusion 121 preferably protrudes radially;The arc surface of arc-shaped groove 120 protrudes outward in the direction away from inner framework 13, preferably, arc-shaped groove 120 extends perpendicularly around inner framework 13, so that the distance between the outer side wall of arc-shaped groove 120 and the axis of inner framework 13 is substantially the same.

[0045] In certain embodiments, as Figures 1-2As shown, the inner frame 13 protrudes from the end face of the outer frame 11 in the axial direction (Y direction), and the buffer side pad 2 is sleeved on the inner frame 13 to abut against the end face of the outer frame 11, so as to avoid friction between the outer frame 11 and other components when the outer frame 11 vibrates or tilts and generate abnormal noise. In one specific scheme, the buffer side pad 2 is sleeved on both ends of the inner frame 13 and abuts against the end face of the outer frame 11. When the vehicle is in a sharp turning working condition, the cab tilts severely, at this time, the buffer side pad 2 can inhibit the excessive tilting swing of the swing arm 6 by the self-rigidity, so as to improve the operation stability of the vehicle, and can also protect the rubber sleeve 12, so as to avoid the tearing phenomenon of the rubber caused by excessive tilting.

[0046] Based on the buffer side pad 2 sleeved on the inner frame 13 to abut against the end face of the outer frame 11, as shown in Figure 1 and Figures 5-6 As shown, the buffer side pad 2 is provided with a tapered hole 23, the buffer side pad 2 is sleeved on the end of the inner frame 13 to abut against the end face of the outer frame 11, the tapered hole 23 abuts against the arc concave surface 123 of the rubber sleeve 12, so as to position the buffer side pad 2, and the tapered hole 23 makes the arc concave surface 123 of the end of the rubber sleeve 12 longer in the axial direction and more durable. Preferably, the axial end of the tapered hole 23 and the side edge of the buffer side pad 2 are arc chamfered structures, so as to avoid the friction between the edge of the tapered hole 23 and the arc concave surface 123 and aggravate the wear.

[0047] Based on the buffer side pad 2 sleeved on the inner frame 13 to abut against the end face of the outer frame 11, as shown in Figure 1 and Figure 6 As shown, the buffer side pad 2 includes a nylon layer 21 and a polyurethane layer 22 fixed to one side of the nylon layer 21, and the nylon layer 21 is used to abut against the end face of the outer frame 11. The nylon layer 21 of the buffer side pad 2 has a certain hardness and wear resistance, so as to effectively alleviate the extrusion of the end face of the outer frame 11 to the polyurethane layer 22 when tilting and the crushing deformation damage caused by long-term use, and the polyurethane layer 22 is preferably a microporous polyurethane NDI material, the surface has a plurality of tiny pores, so that the surface forms a relatively rough plane, and the frictional abnormal noise generated by the relative movement between the surface of the stamping part and the surface of the ordinary polyurethane buffer pad in the smooth state can be inhibited.

[0048] In some embodiments, as shown in Figure 3 The rubber protrusion 121 is large near one end of the inner frame 13 and small away from the other end of the inner frame 13, and the top end of the rubber protrusion 121 is arc-shaped, so that the limiting force of the rubber protrusion 121 gradually increases when the rubber sleeve 12 deforms to abut against the outer wall of the arc-shaped groove 120, thereby absorbing vibration while ensuring a certain X-direction rigidity.

[0049] In a preferred embodiment, as shown in Figure 4As shown, the middle section of the inner frame 13 is radially thickened to form a bulge structure, and the bulge structure is located at the two ends in the Z direction or the outer circumferential surface of the inner frame 13, which can enhance the overall stiffness of the suspension bushing 1, especially the stiffness in the Z direction.

[0050] Further, the rubber sleeve 12 is vulcanized and fixedly connected with the inner frame 13, and the rubber sleeve 12 can also be vulcanized and fixedly connected with the outer frame 11.

[0051] In another aspect, the utility model also provides a kind of automobile suspension, such as Figure 1 As shown, it comprises swing arm 6, turnover support 5 and the suspension bushing 1 provided by the utility model, turnover support 5 is fixedly connected with inner frame 13, swing arm 6 is fixedly connected with outer frame 11, and arc-shaped groove 120 is located at the two ends in X direction when suspension bushing 1 is installed on turnover support 5.If rubber sleeve 12 is densely filled between inner frame 13 and outer frame 11 in X direction, it will increase the stiffness in X direction, and the decline of damping performance will lead to the decline of comfortability.The inner frame 13 of conventional bushing is hinged with turnover support 5 by pin shaft, and the inner frame 13 of conventional bushing is relatively rotated with pin shaft when vehicle vibrates, which is easy to produce abnormal sound, and abnormal sound can be solved in short term after lubricant is applied, but dust is easy to be adsorbed, dust entering the cooperation gap between pin shaft and shaft hole will aggravate abrasion, and lubricant will also be invalid at the same time, and when abrasion amount reaches certain degree, suspension bushing 1 of hinged point or direct new front suspension stabilizer bar assembly needs to be replaced as a whole;Turnover support 5 and swing arm 6 of the utility model are fixedly connected with inner frame 13 and outer frame 11 respectively, and inner frame 13 and turnover support 5 will not relatively move to produce abnormal sound when vibrating and side slipping.

[0052] Based on the above automobile suspension, as shown in the figure, Figure 1 As shown, mounting hole is arranged on swing arm 6, and outer frame 11 of suspension bushing 1 is fixedly arranged in mounting hole, which can be connected in the mode of interference fit;Two opposite mounting plates 51 are arranged on turnover support 5, and inner frame 13 is fixedly connected between two mounting plates 51 by abutting and bolting.The mode of fixedly connecting swing arm 6 and turnover support 5 of suspension bushing 1 is simple, after suspension bushing 1 is fixedly arranged in mounting hole, two mounting plates 51 form inner opening slot to fixedly connect inner frame 13, and installation is simple.

[0053] Based on the fact that two opposite mounting plates 51 are arranged on turnover support 5, as shown in the figure, Figure 1 As shown, insertion hole is arranged on two mounting plates 51, inner frame 13 is located between two mounting plates 51, and inner frame 13 and two insertion holes are penetrated by bolt 3, and then bolt nut 4 is fixedly connected with turnover support by bolting, and after bolt nut 4 and bolt 3 are tightened, two mounting plates 51 can clamp and fix end surface of inner frame 13.

[0054] In a preferred embodiment, the inner frame 13 is provided with a first anti-rotation surface on the inner wall, the turnover support 5 is provided with a limiting surface for abutting against the anti-rotation surface, and the limiting surface abuts against the anti-rotation surface to limit the rotation of the inner frame 13 after the inner frame 13 is installed on the turnover support 5, thereby enhancing the fixing effect. In a specific scheme, the bolt 3 is provided with a limiting surface for abutting against the anti-rotation surface; and the hole wall of the insertion hole is provided with a second anti-rotation surface for abutting against the limiting surface to limit the rotation of the bolt 3. Preferably, the inner wall of the inner frame 13 is in a polygonal structure, for example, a triangular or quadrangular structure, and the sides are the first anti-rotation surfaces, and the screw rod of the bolt 3 is coupled with the inner wall of the inner frame 13 and the inner wall of the insertion hole, thereby achieving anti-rotation.

[0055] As shown in the drawings, the suspension bushing 1 is provided with a buffer side pad 2, and the turnover support 5 is provided with two opposite installation plates 51. Figure 1 As shown in the drawings, the suspension bushing 1 is provided with a buffer side pad 2, and the turnover support 5 is provided with two opposite installation plates 51.

[0056] In actual use, the arc-shaped groove 120 axially penetrates the rubber sleeve 12, the rubber sleeve 12 is vulcanized and fixedly connected with the inner frame 13 and the outer frame 11, the middle part of the inner frame 13 in the axial direction is radially thickened and protruded, the suspension bushing 1 is fixedly connected in the installation hole of the swing arm 6 in an interference fit, the buffer side pad 2 is sleeved on the inner frame 13, the nylon layer 21 at both ends of the inner frame 13 abuts against the side surface of the swing arm 6, and the conical hole 23 abuts against the circular arc concave surface 123 of the rubber sleeve 12; the swing arm 6 on which the suspension bushing 1 is installed is placed between the two installation plates 51, the bolt 3 is sequentially threaded through the insertion hole on one side, the inner frame 13, the insertion hole on the other side, and is screwed with the nut 4, the nut 4 is tightened to the torque requirement according to the requirement, the inner frame 13 is fixedly connected on the turnover support, and the polyurethane layer 22 of the buffer side pad 2 abuts against the installation plate 51.

[0057] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principle of the present application. Various changes and improvements can be made to the present application without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A suspension bushing without a center skeleton, characterized by: The application relates to a suspension bushing (1) comprising an outer skeleton (11) in a ring structure, an inner skeleton (13) in a ring structure sleeved in the outer skeleton (11), and a rubber sleeve (12) arranged between the outer skeleton (11) and the inner skeleton (13). The inner skeleton (13) protrudes from the end surface of the outer skeleton (11) in the axial direction, and the inner skeleton (13) is sleeved with a buffer side pad (2) abutting against the end surface of the outer skeleton (11). The buffer side pad (2) is provided with a tapered hole (23), the buffer side pad (2) is sleeved on the end portion of the inner skeleton (13) and abuts against the end surface of the outer skeleton (11), and the tapered hole (23) abuts against the circular arc concave surface (123) of the rubber sleeve (12). The buffer side pad (2) comprises a nylon layer (21) and a polyurethane layer (22) fixed on one side of the nylon layer (21), and the nylon layer (21) is used for abutting against the end surface of the outer skeleton (11).

2. A non-sleeved suspension liner as defined in claim 1, wherein: The rubber protrusion (121) is large at one end close to the inner skeleton (13) and small at the other end away from the inner skeleton (13).

3. A non-solid core suspension liner as defined in claim 2, wherein: The middle section of the inner skeleton (13) is thickened in the radial direction and forms a raised structure.

4. A non-sleeved suspension liner as defined in claim 2, wherein: The rubber sleeve (12) is vulcanized and fixed to the inner skeleton (13).

5. A non-sandwiched suspension bushing according to any one of claims 1-4, characterized in that: The suspension bushing (1) comprises a turnover support (5), a swing arm (6) and the suspension bushing (1) according to any one of claims 1-7, the turnover support (5) is fixedly connected to the inner skeleton (13), the swing arm (6) is fixedly connected to the outer skeleton (11), and the arc-shaped groove (120) is located at the two ends in the X direction when the suspension bushing (1) is installed on the turnover support (5).

6. A non-sleeved suspension liner as defined in claim 1, wherein: The swing arm (6) is provided with a mounting hole, and the outer skeleton (11) of the suspension bushing (1) is fixedly arranged in the mounting hole; the turnover support (5) is provided with two opposite mounting plates (51), and the two ends of the inner skeleton (13) abut against the mounting plates (51) and are fixedly connected between the two mounting plates (51).

7. A non-solid core suspension liner as defined in claim 1 wherein: The outer diameter of the buffer side pad (2) of the suspension bushing (1) is larger than the outer diameter of the outer skeleton (11), and the two sides abut against the mounting plates (51) and the side surface of the swing arm (6) respectively.

8. An automotive suspension characterized by: ​ 9. A motor vehicle suspension as claimed in claim 8 wherein: ​ 10. A motor vehicle suspension as claimed in claim 9, wherein: ​

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