Composite air suspension for bobbin bridge

Abstract

The present invention discloses a composite air suspension for a bobbin bridge, which is characterized in that it comprises an I-shaped frame, a spring beam bracket and a spring beam arranged below the I-shaped frame, one end of the spring beam is fixed on the spring beam bracket, and the other end is installed with an axle, a first elastomeric shaft sleeve is arranged between the spring beam and the spring beam bracket, a second elastomeric shaft sleeve is arranged between the spring beam and the axle, a vertical airbag and a transverse airbag are arranged on the spring beam, one end of the transverse airbag is connected to the spring beam bracket, and the other end is fixed on the spring beam, the transverse airbag is arranged between the vertical airbag and the axle, a limiting device is arranged between the axle and the I-shaped frame, the vertical airbag and the transverse airbag jointly bear the load to meet the bearing capacity of the axle, the spring beam bracket and the spring beam are connected by a first elastomeric shaft sleeve, and the spring beam and the axle are connected by a second elastomeric shaft sleeve, so as to effectively improve the shock absorption performance of the suspension and reduce the vibration of the vehicle.

Description

Technical Field

[0001] The invention belongs to the technical field of air suspensions, and in particular relates to a composite air suspension for a bobbin bridge. Background Art

[0002] The currently used spool bridge suspension adopts one line and two axles. The two ends of the spring beam are connected to the axle, and the middle of the spring beam is connected to the spring beam bracket, which is welded to the frame. All the connection nodes from the tire to the frame are rigidly connected, and the vehicle's shock absorption performance is particularly poor. Materials are prone to bumps, scratches, and breakage during transportation.

[0003] Therefore, the prior art needs further research. Summary of the invention

[0004] The purpose of the present invention is to provide a composite air suspension for a bobbin bridge, to provide a composite air suspension for a bobbin bridge with a reasonable structure, to improve the shock absorption performance of the suspension, to alleviate vehicle vibration, and to protect the transported materials.

[0005] To solve the above problems, the technical solution adopted by the present invention is: a composite air suspension for a bobbin bridge, including an I-frame, a spring beam bracket and a spring beam arranged below the I-frame, one end of the spring beam is fixed on the spring beam bracket, and the other end is installed with an axle, a first elastomeric sleeve is arranged between the spring beam and the spring beam bracket, a second elastomeric sleeve is arranged between the spring beam and the axle, a vertical airbag and a transverse airbag are arranged on the spring beam, one end of the transverse airbag is connected to the spring beam bracket, and the other end is fixed on the spring beam, the transverse airbag is arranged between the vertical airbag and the axle, and a limiting device is arranged between the axle and the I-frame.

[0006] The transverse airbag is a hyperbolic airbag.

[0007] A mounting sleeve is arranged at one end of the spring beam, and a mounting shaft is arranged at the other end. A transverse airbag bracket and a longitudinal airbag mounting plate are arranged on the spring beam.

[0008] The spring beam bracket includes a top plate and side plates arranged on both sides, a transverse airbag mounting plate is arranged between the two side plates, and a spring beam mounting groove is formed below the mounting plate and between the two side plates.

[0009] The side plate is provided with a first mounting hole, the first mounting hole is provided correspondingly to the mounting sleeve, the side plate and the mounting sleeve are connected via a first pin shaft, a slotted nut is provided correspondingly between one side of the mounting sleeve and the first pin shaft, the first elastomer bearing is installed between the mounting sleeve and the first pin shaft, and a step sleeve is provided between the slotted nut and the first elastomer sleeve.

[0010] The first elastomer bearing and the second elastomer bearing are both made of rubber material. The first elastomer bearing is radially provided with two layers of metal skeletons, and the end surface of the first elastomer bearing is provided with three layers of metal skeletons.

[0011] The second elastomer bearing is radially provided with a metal frame on one side, and the end surface of the second elastomer bearing is provided with three layers of metal frames.

[0012] A shock absorber is arranged between the side plate and the spring beam, shock absorber mounting columns are arranged on both sides of the spring beam, one end of the shock absorber is fixed on the spring beam bracket, and the other end is fixed on the shock absorber mounting column.

[0013] A second mounting hole is arranged on the axle corresponding to the mounting shaft, the mounting shaft passes through the second mounting hole and is fixed on the axle by a nut, and the second elastomeric bearing is installed between the mounting shaft and the second mounting hole.

[0014] The limiting device comprises a limiting bracket arranged on the vehicle axle, and a limiting steel wire rope is arranged between the limiting bracket and the I-shaped frame.

[0015] The beneficial effects of the present invention are:

[0016] 1. The present invention arranges longitudinal airbags and transverse airbags to carry loads together to meet the bearing capacity of the axle, arranges transverse airbags between the spring beam and the spring bracket, arranges shock absorbers between the spring beam and the spring bracket to attenuate vibration from the ground, connects the spring beam bracket with the spring beam with a first elastic sleeve, and connects the spring beam with the axle with a second elastic sleeve, effectively improving the shock absorption performance of the suspension and reducing vehicle vibration.

[0017] 2. The present invention arranges a first elastomeric bushing to connect the spring beam bracket and the spring beam, and adopts a second elastomeric bushing to connect the spring beam and the axle. Compression during installation produces greater radial stiffness and axial stiffness. The vibration from the ground is filtered through these two elastomeric bearings, reducing vibration transmission. At the same time, the airbag also damps the vibration, and the shock absorber attenuates the vibration, thereby improving the shock absorption effect of the vehicle. Compared with traditional rigid connections, since there is no wear between metal parts, there is no looseness between mating parts, abnormal noise, axle deviation and other phenomena, and the life of the suspension and axle assembly is improved.

[0018] 3. The present invention arranges a longitudinal airbag between the spring beam and the I-shaped frame. The longitudinal airbag not only carries loads but also reduces shocks. The longitudinal airbag is located between the tires on both sides and close to the front end. Due to the distance limitation of the inner side of the tires of the axle, the load of the longitudinal airbag is insufficient to meet the load-bearing capacity requirement. A transverse airbag is arranged between the spring beam and the spring bracket, mainly to supplement the insufficient load-bearing capacity of the longitudinal airbag. Due to space limitations, a hyperbolic airbag is arranged as the transverse airbag and arranged transversely, which reduces the longitudinal distance, makes the entire suspension arrangement more compact, and achieves better load-bearing and shock-absorbing effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the local structure of the present invention;

[0021] Figure 3 is a schematic diagram of the spring beam structure;

[0022] Figure 4 It is a schematic diagram of the spring beam support mechanism;

[0023] Figure 5 It is a schematic diagram of the local connection structure between the spring beam and the spring beam bracket;

[0024] Figure 6 It is a schematic diagram of the local connection structure between the spring beam and the axle;

[0025] Figure 7 is a partial cross-sectional view of a first elastomeric sleeve;

[0026] Figure 8 is a partial cross-sectional view of a second elastomeric sleeve;

[0027] Fig. 9 It is a plan view of the present invention. DETAILED DESCRIPTION

[0028] In order to clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods and in conjunction with the accompanying drawings.

[0029] like Figure 1-9As shown, a composite air suspension for a bobbin bridge comprises an I-shaped frame 1, a spring beam bracket 2 and a spring beam 4 arranged below the I-shaped frame 1, one end of the spring beam 4 is installed on the spring beam bracket, and the other end is provided with an axle 3, a first elastomeric sleeve 5 is arranged between the spring beam 4 and the spring beam bracket 2, a second elastomeric sleeve 9 is arranged between the spring beam 4 and the axle 3, a longitudinal airbag 7 and a transverse airbag 6 are arranged on the spring beam 4, the transverse airbag 6 is a hyperbolic airbag, one end of the transverse airbag 6 is connected to the spring beam bracket 2, and the other end is fixed on the spring beam 4, the transverse airbag 6 is arranged between the longitudinal airbag 7 and the axle 3, and a limiting device is arranged between the axle 3 and the I-shaped frame 1.

[0030] Specifically, the longitudinal airbag 7 and the transverse airbag 6 bear the load together. In addition, the transverse airbag 6 mainly supplements the insufficient load-bearing capacity of the longitudinal airbag. Due to space limitations, the transverse airbag 6 is set as a hyperbolic airbag and arranged horizontally. This reduces the longitudinal distance and makes the entire suspension arrangement more compact, thereby achieving better load-bearing and shock-absorbing effects.

[0031] The spring beam 4 is provided with a mounting sleeve 401 at one end and a mounting shaft 402 at the other end. The spring beam 4 is provided with a transverse airbag bracket 403 and a longitudinal airbag mounting plate 404. The spring beam bracket 2 includes a top plate 201 and side plates 202 arranged on both sides. A transverse airbag mounting plate 203 is arranged between the two side plates. A spring beam mounting groove 204 is formed below the transverse airbag mounting plate 203 and between the two side plates 202.

[0032] Specifically, one end of the transverse airbag 6 is connected to the transverse airbag bracket 403 and the other end is fixed to the transverse airbag mounting plate 203 ; one end of the longitudinal airbag 7 is fixed to the longitudinal airbag mounting plate 404 and the other end is fixed to the I-shaped frame 1 .

[0033] The side plate 202 is provided with a first mounting hole 221, and the first mounting hole 221 is provided correspondingly to the mounting sleeve 401. The side plate 201 and the mounting sleeve 401 are connected via a first pin shaft 10, and a slotted nut 11 is provided correspondingly between one side of the mounting sleeve 401 and the first pin shaft 10. The first elastomeric bearing 5 is installed between the mounting sleeve 401 and the first pin shaft 10, and a step sleeve 11 is provided between the slotted nut 11 and the first elastomeric bearing. Both the first elastomeric bearing 5 and the second elastomeric bearing 9 are made of rubber. The first elastomeric bearing 5 is radially provided with two layers of first metal skeleton 501, and the end face of the first elastomeric bearing 5 is provided with three layers of second metal skeleton 502.

[0034] Specifically, the first elastomer bearing 5 is installed in the installation sleeve 401, and then the spring beam 4 is installed in the spring beam installation groove 204 of the spring beam bracket 2. The first pin shaft 10 passes through the first installation hole 221 and the first elastomer bearing 5, and then the step sleeve 12 is installed, and then it is tightened and fixed with bolts, so as to make the first elastomer bearing 5 deform more axially to achieve the required axial stiffness. The first elastomer bearing 5 adopts two layers of first metal skeleton 501 in the radial direction and three layers of second metal skeleton 502 in the end face to form a mechanism in which the metal skeleton surrounds the space rubber elastic body. This structure ensures that the rotation point has sufficient radial stiffness and axial stiffness during installation to control the force and bending moment under complex working conditions such as traction, braking, and turning, and can also well filter the vibration transmitted from the spring beam 4 to the spring beam bracket 2.

[0035] A second mounting hole 301 is arranged on the axle 3 corresponding to the mounting shaft 402, and the mounting shaft 402 passes through the second mounting hole 301 and is fixed on the axle 3 by a nut, and the second elastomeric bearing 9 is installed between the mounting shaft 402 and the second mounting hole 301, and a layer of first metal skeleton 501 is arranged radially on the second elastomeric bearing 9, and three layers of second metal skeleton 502 are arranged on the end face of the second elastomeric bearing 9.

[0036] Specifically, the second elastomeric bearing 9 is installed in the second mounting hole 301, and then the mounting shaft 402 is passed through the second mounting hole 301 and fixed with a nut. A layer of the first metal skeleton 501 is used radially, and three layers of the second metal skeleton 502 are used on the end face mainly to improve the axial stiffness. In addition to having a certain radial stiffness, the elastomer also needs to have a certain elastic deformation to realize the rotation between the axle 3 and the spring beam 4, thereby meeting the dynamic movement requirements of the axle 3.

[0037] A shock absorber 13 is arranged between the side plate 202 and the spring beam 4 , and shock absorber mounting columns 405 are arranged on both sides of the spring beam 4 . One end of the shock absorber 13 is fixed on the spring beam bracket 2 , and the other end is fixed on the shock absorber mounting column 405 .

[0038] The limiting device includes a limiting bracket 302 arranged on the axle 3, and a limiting wire rope 8 is arranged between the limiting bracket 302 and the I-shaped frame 1. Specifically, the I-shaped frame 1 is welded to the frame, and the limiting wire rope is arranged to limit the axle 3 and the frame.

[0039] The above description is only a preferred embodiment of the present invention. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A composite air suspension for a bobbin bridge, characterized in that: It comprises an I-shaped frame, a spring beam bracket and a spring beam arranged below the I-shaped frame, one end of the spring beam is fixed on the spring beam bracket, and the other end is installed with a vehicle axle, a first elastic body sleeve is arranged between the spring beam and the spring beam bracket, a second elastic body sleeve is arranged between the spring beam and the vehicle axle, a longitudinal airbag and a transverse airbag are arranged on the spring beam, one end of the transverse airbag is connected to the spring beam bracket, and the other end is fixed on the spring beam, the transverse airbag is arranged between the longitudinal airbag and the vehicle axle, and a limit device is arranged between the vehicle axle and the I-shaped frame; A mounting sleeve is arranged at one end of the spring beam, and a mounting shaft is arranged at the other end; the spring beam is provided with a transverse airbag bracket and a longitudinal airbag mounting plate; The spring beam bracket includes a top plate and side plates arranged on both sides, a transverse airbag mounting plate is arranged between the two side plates, and a spring beam mounting groove is formed below the mounting plate and between the two side plates; A first mounting hole is arranged on the side plate, the first mounting hole is arranged correspondingly to the mounting sleeve, the side plate and the mounting sleeve are connected via a first pin shaft, a slotted nut is arranged correspondingly between one side of the mounting sleeve and the first pin shaft, the first elastic body sleeve is installed between the mounting sleeve and the first pin shaft, and a step sleeve is arranged between the slotted nut and the first elastic body sleeve; A second mounting hole is arranged on the axle corresponding to the mounting shaft, the mounting shaft passes through the second mounting hole and is fixed on the axle by a nut, and the second elastic body sleeve is installed between the mounting shaft and the second mounting hole; The transverse airbag is provided with a hyperbolic airbag, arranged transversely; One end of the transverse airbag is connected to the transverse airbag bracket, and the other end is fixed to the transverse airbag mounting plate; one end of the longitudinal airbag is fixed to the longitudinal airbag mounting plate, and the other end is fixed to the I-shaped frame.

2. A composite air suspension for a bobbin bridge as claimed in claim 1, characterized in that: The first elastomer sleeve and the second elastomer sleeve are both made of rubber material. The first elastomer sleeve is radially provided with two layers of metal skeletons, and the end surface of the first elastomer sleeve is provided with three layers of metal skeletons.

3. A composite air suspension for a bobbin bridge as claimed in claim 2, characterized in that: A metal frame is radially arranged on one side of the second elastomer sleeve, and a three-layer metal frame is arranged on the end surface of the second elastomer sleeve.

4. A composite air suspension for a bobbin bridge as claimed in claim 3, characterized in that: A shock absorber is arranged between the side plate and the spring beam, shock absorber mounting columns are arranged on both sides of the spring beam, one end of the shock absorber is fixed on the spring beam bracket, and the other end is fixed on the shock absorber mounting column.

5. The composite air suspension for a bobbin bridge according to claim 1, characterized in that: The limiting device comprises a limiting bracket arranged on the vehicle axle, and a limiting steel wire rope is arranged between the limiting bracket and the I-shaped frame.

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