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CN-121973852-A - Flexible three-point supporting mechanism for support auxiliary beam of cross-country chassis

CN121973852ACN 121973852 ACN121973852 ACN 121973852ACN-121973852-A

Abstract

The invention relates to the technical field of automobile chassis, in particular to a flexible three-point supporting mechanism for a support auxiliary beam of an off-road chassis, which comprises a front cross beam and a rear cross beam, wherein the front cross beam and the rear cross beam are arranged in parallel at intervals, a left longitudinal beam and a right longitudinal beam are arranged between the front cross beam and the rear cross beam, a front mounting platform and a rear mounting platform are arranged between the left longitudinal beam and the right longitudinal beam, two front rubber bushings are respectively arranged on the left side and the right side of the front mounting platform, a rear rubber bushing is arranged in the middle of the rear mounting platform, connecting rods are respectively arranged in the middle of the front rubber bushing and the rear rubber bushing, two stiffening beams are jointly connected between the front mounting platform and the rear mounting platform, and pneumatic energy absorbing units are respectively arranged in the stiffening beams. The invention adopts the front rubber bushing, the rear rubber bushing and the pneumatic energy absorbing unit to absorb multiple shock and energy, thereby improving the control stability and comfort of the vehicle in the off-road section.

Inventors

  • GUO YONGXIANG
  • GUO YAN

Assignees

  • 江苏中意汽车有限公司

Dates

Publication Date
20260505
Application Date
20260325

Claims (8)

  1. 1. A flexible three-point supporting mechanism for a support auxiliary beam of an off-road chassis is characterized by comprising a front cross beam (1) and a rear cross beam (2), wherein the front cross beam (1) and the rear cross beam (2) are arranged at intervals in parallel, a left longitudinal beam (3) and a right longitudinal beam (4) are arranged between the front cross beam (1) and the rear cross beam (2), the left longitudinal beam (3) and the right longitudinal beam (4) are vertically arranged between the front cross beam (1) and the rear cross beam (2) and are used for connecting the front cross beam (1) and the rear cross beam (2), the left longitudinal beam (3) and the right longitudinal beam (4) are arranged at intervals in parallel, a front mounting platform (5) and a rear mounting platform (6) are arranged between the left longitudinal beam (3) and the right longitudinal beam (4), the front mounting platform (5) is positioned on one side close to the front cross beam (1), two ends of the front mounting platform (5) are respectively fixedly connected between the left longitudinal beam (3) and the right longitudinal beam (4), the two ends of the rear mounting platform (6) are respectively fixedly connected between the left longitudinal beam (3) and the right longitudinal beam (4) and the two front side bushings (7) respectively, the middle of back mounting platform (6) is provided with one back rubber bush (8), all be equipped with in the middle of preceding rubber bush (7) and back rubber bush (8) be used for with car main frame connection's connecting rod (9), be connected with two stiffening beam (10) jointly between preceding mounting platform (5), back mounting platform (6), two stiffening beam (10) align with two preceding rubber bush (7) respectively, stiffening beam (10) are inside all to be provided with and are used for preventing connecting rod (9) violent wobbling pneumatic energy-absorbing unit.
  2. 2. The flexible three-point support mechanism for a bracket auxiliary beam of an off-road chassis according to claim 1, wherein the pneumatic energy absorbing unit comprises front swinging rods (11) which are arranged at positions, close to a front mounting platform (5), of the reinforcing beam (10), the middle sections of the front swinging rods (11) are respectively connected to the reinforcing beam (10) through spherical hinges, the tops of the front swinging rods (11) respectively extend out of the reinforcing beam (10) and the bottoms of the front swinging rods respectively extend into the reinforcing beam (10), a front flexible sheet (12) and a rear flexible sheet (13) are respectively arranged in each reinforcing beam (10), an air cavity (14) is formed between each front flexible sheet (12) and each rear flexible sheet (13), a front sliding block (15) is arranged in each air cavity (14) in a sealing sliding manner, front sliding manner is respectively arranged between each front sliding block (15) and each front swinging rod (11), each front sliding block (16) penetrates through each front flexible sheet (12) and is connected to the bottom of each front swinging rod (11), the other ends of the front swinging rods (16) are respectively hinged to the bottoms of the front swinging rods (11), the other ends of the front sliding blocks (16) are respectively connected to the front sliding blocks (17) respectively, the front sliding blocks (17) are respectively connected to the front sliding blocks (17) respectively, the other end is connected with the top end of the front swing rod (11) in a spherical hinge way, and the reinforcing beam (10) is also provided with an exhaust hole (19) for allowing gas to enter and exit.
  3. 3. A flexible three-point support mechanism for a cradle secondary beam of an off-road chassis as defined in claim 2, it is characterized in that the pneumatic energy absorption unit also comprises a rear swing rod (20) arranged close to the rear mounting platform (6), the middle sections of the rear swing rods (20) are respectively connected to the stiffening beam (10) through spherical hinges, the top of the rear swing rod (20) extends out of the stiffening beam (10) and the bottom thereof extends into the stiffening beam (10), the inside of the air cavity (14) is also provided with a rear sliding block (21) in a sealing sliding manner, a rear pull rod (22) is arranged between the rear sliding block (21) and the rear swing rod (20), the rear pull rod (22) passes through the rear flexible sheet (13) and one end of the rear pull rod is connected with the bottom of the rear swing rod (20) in a spherical hinge manner, the other end of the rear pull rod (22) is connected with a rear sliding block (21) in a ball hinge way, a lap bar (23) is arranged between the two rear swing rods (20), two ends of the lapping rod (23) are respectively connected with the top spherical hinges of the two rear swinging rods (20), a rear buckle (24) is slidably arranged on the connecting rod (9) of the rear rubber bushing (8), a rear connecting rod (25) is arranged between the rear buckle (24) and the lapping rod (23), one end of the rear connecting rod (25) is in spherical hinge connection with the rear buckle (24), and the other end of the rear connecting rod is fixedly connected with the lapping rod (23).
  4. 4. A flexible three-point support mechanism for a bracket secondary beam of an off-road chassis according to claim 3, characterized in that a partition plate (26) is arranged between the front slider (15) and the rear slider (21), the partition plate (26) divides the air cavity (14) into a front cavity (141) and a rear cavity (142), the front slider (15) is located inside the front cavity (141), and the rear slider (21) is located inside the rear cavity (142).
  5. 5. The flexible three-point support mechanism for a bracket secondary beam of an off-road chassis according to claim 4, wherein the exhaust hole (19) comprises a first air hole (191) and a second air hole (192) which are arranged in the front cavity (141), the first air hole (191) is positioned on one side of the front cavity (141) close to the front mounting platform (5), the second air hole (192) is positioned on one side of the front cavity (141) close to the partition plate (26), the exhaust hole (19) further comprises a third air hole (193) and a fourth air hole (194) which are arranged in the rear cavity (142), the third air hole (193) is positioned on one side of the air cavity (14) close to the rear mounting platform (6), the fourth air hole (194) is positioned on one side of the rear cavity (142) close to the partition plate (26), a first pipeline (27) is connected between the first air hole (191) and the fourth air hole (194), and a second pipeline (28) is connected between the second air hole (192) and the third air hole (193).
  6. 6. The flexible three-point support mechanism for the support auxiliary beam of the cross-country chassis according to claim 4, wherein two triangular reinforcing blocks (29) are symmetrically arranged at the connecting position between the rear connecting rod (25) and the lapping rod (23), one sides of the reinforcing blocks (29) are welded on the rear connecting rod (25), the other sides of the reinforcing blocks are welded on the lapping rod (23), and the reinforcing blocks (29) are used for improving the connecting strength between the connecting rod (9) and the lapping rod (23).
  7. 7. The flexible three-point support mechanism for the auxiliary support beam of the cross-country chassis according to claim 5, wherein the first air hole (191), the second air hole (192), the third air hole (193) and the fourth air hole (194) are all located below the stiffening beam (10), the first pipeline (27) and the second pipeline (28) are respectively communicated with a lubrication bin (30), the lubrication bin (30) is used for storing lubricating oil, and the lubrication bin (30) is further provided with an oil filling port (31).
  8. 8. The flexible three-point support mechanism for the auxiliary support beam of the cross-country chassis according to claim 1, wherein through grooves (32) penetrating through the stiffening beam (10) are formed in the side walls of the front side and the rear side of the stiffening beam (10), the two through grooves (32) correspond to the front swing rod (11) and the rear swing rod (20) respectively, and the two through grooves (32) are located under the front swing rod (11) and the rear swing rod (20) respectively.

Description

Flexible three-point supporting mechanism for support auxiliary beam of cross-country chassis Technical Field The invention relates to the technical field of automobile chassis, in particular to a flexible three-point supporting mechanism for a bracket auxiliary beam of an off-road chassis. Background With popularization of camping culture and off-road exploration, new energy off-road caravans gradually become new market hotspots. The vehicle type has the passing capability of coping with complex off-road conditions such as non-paved roads, sand, mud and the like, and provides relatively quiet and comfortable living environment for personnel in the vehicle during parking, and has extremely high design requirement on a chassis system. In a conventional off-road caravan chassis structure, a bracket sub-beam, also called a sub-frame, is used as a key load bearing component for connecting a suspension system and a vehicle body, and is typically flexibly connected with the vehicle body through a rubber bushing. The single-stage rubber bushing flexible connection mode can filter high-frequency vibration of the road surface to a certain extent, and can greatly improve the travelling comfort in highway travelling. However, compared with the traditional fuel oil type off-road motor home, the new energy off-road motor home is heavier due to the fact that the battery is carried, so that under the condition of a complex outdoor road surface, self inertia is larger, a single-stage energy absorption mode of the rubber bushing cannot effectively absorb shock, the swing and the swing amplitude of the running of the motor home are larger, and the motor home is not stable. Under the condition of adopting single-stage rubber bushing flexible connection, the connection flexibility between the auxiliary frame and the main frame is too strong, and the response of the wheels to the main frame is too slow, so that a driver can feel that the operability of the vehicle is not strong, and the situation is particularly obvious particularly in an off-road environment. For this purpose, a flexible three-point support mechanism for a support secondary beam of an off-road chassis is proposed. Disclosure of Invention The invention aims to provide a flexible three-point supporting mechanism for a support auxiliary beam of an off-road chassis, which solves the problem that the flexible connection of a single-stage rubber bushing in the background art cannot balance the requirement of an off-road vehicle on shock absorption and control performance in an on-road and field environment. In order to achieve the above purpose, the present invention provides the following technical solutions: A flexible three-point support mechanism for cross country chassis's support auxiliary girder, including front cross beam and rear cross beam, front cross beam, rear cross beam parallel interval setting, be provided with left longeron and right longeron between front cross beam and the rear cross beam, left side longeron, right longeron set up perpendicularly and be used for connecting front cross beam and rear cross beam between front cross beam, rear cross beam, and parallel interval setting between left side longeron, right longeron, be provided with front mounting platform and rear mounting platform between left side longeron, front mounting platform is located one side that is close to the front cross beam, and front mounting platform's both ends are fixed connection respectively between left side longeron and right longeron, rear mounting platform's both ends are located one side that is close to the rear cross beam, and rear mounting platform's both ends are also fixed connection respectively between left side longeron and right longeron, front mounting platform's left and right sides are equipped with two preceding rubber bush respectively, rear mounting platform's centre is provided with a rear rubber bush, front rubber bush and rear rubber bush's centre all is equipped with the connecting rod that is used for being connected with car main frame, be connected with jointly between front mounting platform, rear mounting platform, two stiffening beams are connected with two, two stiffening beams are all to the stiffening beam, two stiffening beams are used for preventing that two stiffening beams are equal to the inside the stiffening beam, the stiffening beam is used for the bridge. A three-point supporting structure is formed by the two front rubber bushings and the rear rubber bushing, and the bracket auxiliary beam is flexibly connected with the main frame through the connecting rod. The connecting point between the support auxiliary beam and the main frame is reduced, so that the flexibility of the support auxiliary beam is higher, and the comfort of the vehicle on a road and other stable road sections is improved. Meanwhile, two stiffening beams are additionally arranged between the front mounting platform and the rear mounting platform, so that th