Z-shaped arm air suspension without transverse pushing and cross beam

Abstract

The utility model discloses a Z-shaped arm air suspension without a transverse push and a cross beam, which comprises a Z-shaped arm, a light-weight plate spring seat, an upper bridge seat, a flattened u bolt, a thickened flange nut, an integrated lower bridge seat, a light-weight limiting assembly, an air bag upper bracket, a plate spring pressing block, a clamping block, a step pin and a light-weight shock absorber upper bracket, the front end of the Z-shaped arm is provided with a large-rigidity bushing, two light-weight plate spring seats are symmetrically fixed on each of two sides of the frame, the front end of the Z-shaped arm is connected with the light-weight plate spring seats, the tail end of the Z-shaped arm is connected with the air spring assembly, and the upper end of the air spring assembly is connected with the frame; the two front Z-shaped arms are connected with one end of the middle axle, and the two rear Z-shaped arms are connected with one end of the rear axle; shock absorber assemblies are arranged on the inner sides of the middle axle and the rear axle, the upper portions of the shock absorber assemblies are connected with the frame, and the lower portions of the shock absorber assemblies are connected to the axles. The space structure of the suspension is more optimized, the number of parts is greatly reduced, the weight of the suspension is reduced, and the fuel economy of a vehicle is improved.

Description

Technical Field

[0001] The utility model relates to a Z-arm air suspension without horizontal thrust and crossbeam, belonging to the technical field of automobile suspension. Background Art

[0002] With the rapid development of my country's expressways, the volume of road transportation has increased rapidly, and the requirements for high-speed performance of vehicles have become increasingly higher. Air suspension has the advantages of effectively absorbing high-frequency vibrations, extending the service life of trucks, improving the smoothness of vehicle driving and ensuring the integrity of cargo transportation. It is increasingly widely used in trucks. The main form of air suspension currently widely used is to equip the middle bridge and rear bridge with four air spring assemblies (such as Figure 4 As shown), an I-beam structure is used as the uniform crossbeam, various forms of thrust rods are used on the axles to generate sufficient longitudinal and lateral support, and a large cast bracket is provided between the middle axle and the rear axle. Transverse stabilizer bar assemblies are provided at both ends of the air suspension to provide sufficient roll angle stiffness, and four shock absorber assemblies are provided on both sides of the frame. The overall structure of the air suspension is complex, the number of parts is too large, the assembly efficiency is low, the car itself is heavy, and the low cost, lightweight, and high performance requirements of the air suspension cannot be met, which increases the fuel (gas) cost of the vehicle. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide an air suspension with simple spatial structure, low cost and high performance in view of the defects in the prior art.

[0004] In order to solve this technical problem, the utility model provides a non-transverse thrust and non-crossbeam Z-arm air suspension, including a Z-arm, a lightweight leaf spring seat, an upper bridge seat, a flattened riding bolt, a thickened flange nut, an integrated lower bridge seat, a lightweight limit assembly, an air bag upper bracket, a leaf spring pressure block, a clamping block, a stepped pin, and a lightweight shock absorber upper bracket. The Z-arm is Z-shaped as a whole, and a high-rigidity bushing is provided at its front end. Two lightweight leaf spring seats are symmetrically fixed on the left and right sides of the frame. The front end of the Z-arm is connected to the lightweight leaf spring seat through a high-rigidity bushing and a stepped pin, and the end is connected to the air spring assembly through bolts. The upper end of the air spring assembly is connected to the frame through the air bag upper bracket; the two front Z-shaped arms are fixedly connected to one end of the middle bridge through leaf spring pressure blocks, flattened riding bolts, thickened flange nuts, bridge upper seats and integrated bridge lower seats, and the two rear Z-shaped arms are fixedly connected to one end of the rear axle through leaf spring pressure blocks, flattened riding bolts, thickened flange nuts, bridge upper seats and integrated bridge lower seats, and the Z-shaped arms and the middle bridge or rear axle form a "U"-shaped structure as a whole; a shock absorber assembly is arranged on the inner side of the middle bridge and the rear axle, and the upper part of the shock absorber assembly is connected to the frame through a lightweight shock absorber upper bracket, and the lower part is connected to the bridge through an integrated bridge lower seat.

[0005] A center bolt and a pin are provided in the middle of the Z-shaped arm, and the center bolt and the pin are assembled and positioned with the leaf spring pressure block and the bridge seat. Four clamping blocks are provided on the upper and lower sides of the left and right sides of both ends of the middle bridge and the rear bridge, and are assembled and positioned with the bridge seat and the integrated bridge lower seat. A lightweight limiting assembly is provided on the frame just above the leaf spring pressure block; baffles are provided on the left and right sides of the bridge seat to limit the mutual displacement of the middle bridge and the rear axle relative to the Z-shaped arm, and the bridge seat and the integrated bridge lower seat are limited by lateral displacement through a total of four clamping blocks on the upper and lower sides of the middle bridge or the rear axle.

[0006] The Z-shaped arm is made of spring steel material, with two front sides curled to form curled ears. The entire section is made of sheet materials of unequal thickness stacked together and the first sheet is "Z"-shaped. The side edge of the end leaf spring forms an angle of 28±1° with the bottom edge of the "Z"-shaped leaf spring, and is fixed with a center bolt and pin.

[0007] There are four left-right symmetrical lightweight limit assemblies between the middle bridge, the rear bridge and the frame, which are located just above the leaf spring pressure block to ensure the suspension jump limit, and a weight reduction hole is provided in the middle of the structure.

[0008] The middle bridge and the rear bridge are respectively provided with two large-rigidity air spring assemblies on the left and right, and the shock absorber assembly is arranged on the inner side of the vehicle frame.

[0009] Beneficial effects: The Z-arm of the utility model is designed with a structure of superimposed leaf spring steels of unequal thickness. The structure and materials meet the longitudinal support of the suspension. The front end is connected to the lightweight leaf spring support through a stepped pin and a high-rigidity bushing, and the rear end is connected to a high-rigidity air spring assembly, thereby ensuring the roll stiffness and anti-overturning performance of the suspension. The utility model adopts lightweight and integrated parts to achieve lightweight while ensuring structural strength, thereby reducing manufacturing costs. The suspension space structure of the utility model is more optimized, the number of parts is greatly reduced, the weight of the suspension itself is greatly reduced, and the fuel economy of the vehicle is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic isometric view of the assembly of the utility model on a vehicle;

[0011] Figure 2 A schematic top view of the assembly of the utility model on a vehicle;

[0012] Figure 3 It is a schematic diagram of the assembly of the Z-arm assembly of the utility model;

[0013] Figure 4 It is a schematic diagram of air suspension assembly in the prior art.

[0014] In the figure: 1. middle bridge; 2. rear bridge; 3. Z-arm; 4. frame; 5. lightweight leaf spring seat; 6. air spring assembly; 7. bridge upper seat; 8. flattened riding bolt; 9. thickened flange nut; 10. integrated bridge lower seat; 11. shock absorber assembly; 12. lightweight limit assembly; 13. air bag upper bracket; 14. leaf spring pressure block; 15. clamping block; 16. stepped pin; 17. lightweight shock absorber upper bracket; 101. high-rigidity bushing; 102. center bolt; 103. pin. DETAILED DESCRIPTION

[0015] The utility model is described in detail below in conjunction with the accompanying drawings and embodiments.

[0016] like Figure 1-Figure 3 As shown, the utility model provides a Z-arm air suspension without transverse thrust and crossbeam, including a Z-arm 3, a lightweight leaf spring seat 5, an upper bridge seat 7, a flattened riding bolt 8, a thickened flange nut 9, an integrated lower bridge seat 10, a lightweight limit assembly 12, an air bag upper bracket 13, a leaf spring pressure block 14, a clamping block 15, a stepped pin 16, and a lightweight shock absorber upper bracket 17. The Z-arm 3 is Z-shaped as a whole, and a large rigidity bushing 101 is provided at its front end. Two lightweight leaf spring seats 5 are symmetrically fixed on the left and right sides of the frame 4. The front end of the Z-arm 3 is connected to the lightweight leaf spring seat 5 through the large rigidity bushing 101 and the stepped pin 16. The end of the Z-arm 3 is connected to the air spring assembly 6 through bolts. The upper end of the air spring assembly 6 is connected to the frame 4 through the air bag upper bracket 13. The air spring assembly 6 is directly fixed on The front two Z-arms 3 are fixedly connected to one end of the middle bridge 1 by means of leaf spring pressure blocks 14, flattened riding bolts 8, thickened flange nuts 9, bridge upper seats 7 and integrated bridge lower seats 10, and the rear two Z-arms 3 are fixedly connected to one end of the rear bridge 2 by means of leaf spring pressure blocks 14, flattened riding bolts 8, thickened flange nuts 9, bridge upper seats 7 and integrated bridge lower seats 10. The Z-arms 3 and the middle bridge 1 or the rear bridge 2 form a "U"-shaped structure as a whole, so that the suspension has a larger roll stiffness, and the body is more stable when the wheels jump on bumpy roads; a shock absorber assembly 11 is arranged on the inner side of the middle bridge 1 and the rear axle 2, and the upper side of the shock absorber assembly 11 is connected to the frame 4 by a lightweight shock absorber upper bracket 17, and the lower side is connected to the bridge by an integrated bridge lower seat 10, so as to effectively utilize the suspension structure space and reduce the number of parts.

[0017] A central bolt 102 and a pin 103 are provided in the middle of the Z-shaped arm 3, and the central bolt 102 and the pin 103 are assembled and positioned with the leaf spring pressure block 14 and the bridge seat 7. Four clamping blocks 15 are provided on the upper and lower sides of the left and right sides of both ends of the bridge, and are assembled and positioned with the bridge seat 7 and the integrated bridge lower seat 10, so that the suspension has a larger roll stiffness; a lightweight limit assembly 12 is provided on the frame 4 just above the leaf spring pressure block 14; the middle bridge 1 and the rear axle 2 do not shift relative to the Z-shaped arm 3, and the left and right side baffles of the bridge seat 7 limit the lateral shift of the Z-shaped arm 3, and the bridge seat 7 and the integrated bridge lower seat 10 limit the lateral shift through a total of four clamping blocks 15 on both sides of the middle bridge 1 or the rear axle 2, so that the body is more stable when the wheels jump on bumpy roads.

[0018] The Z-shaped arm 3 is made of spring steel material, and is formed by curling two front sides to form curled ears. The entire section is made of sheet materials of unequal thickness stacked together and the first sheet is "Z"-shaped. The side of the end leaf spring and the bottom edge of the "Z"-shaped leaf spring form an angle of 28±1°, and are fixed with a center bolt 102 and a pin 103, which facilitates the installation and fixation of the air spring assembly and improves the overall installation efficiency of the suspension. The Z-shaped arm 3 structurally adopts a design of stacking unequal thickness leaf spring steels, eliminating the traditional longitudinal thrust rod structure, and the structure and materials meet the longitudinal support of the suspension.

[0019] There are four left-right symmetrical lightweight limit assemblies 12 between the middle bridge 1 and the rear bridge 2 and the frame 4, which are located just above the leaf spring pressure block 14 to ensure the suspension jump limit. A weight reduction hole is provided in the middle of the structure to achieve lightweight.

[0020] The middle bridge 1 and the rear bridge 2 are each provided with two large-rigidity air spring assemblies on the left and right, and the shock absorber assembly is arranged on the inner side of the frame, so that the suspension space structure is more optimized and the number of parts is reduced.

[0021] When the vehicle is equipped with only one rear axle, the structure is a rear axle Z-arm air suspension; the Z-arm air suspension can be matched with a lifting axle (driven or non-driven axle), and the rear axle can be lifted by matching the airbag lifting group on the rear axle of the vehicle.

[0022] The front end of the Z-arm of the utility model is connected to the lightweight leaf spring support by a stepped pin and a high-rigidity bushing, and is fixedly connected to the middle bridge or the rear bridge in the middle, and adopts a high-rigidity air spring assembly, which meets the anti-overturning performance of the suspension and eliminates the traditional V-shaped thrust rod structure; compared with the uniform crossbeam of the traditional air suspension, the Z-arm structure has a more uniform vertical force, reduces stress concentration, and optimizes the suspension space structure, reduces the number of parts, greatly reduces the weight of the suspension itself, and improves the fuel economy of the vehicle; the four lightweight leaf spring supports that are symmetrical on the left and right of the frame have all been structurally optimized, and lightweight is achieved while ensuring the strength of the supports, thereby reducing manufacturing costs and improving the fuel economy of the vehicle.

[0023] The above embodiments of the present invention are merely illustrative and not exclusive, and all modifications within the scope of the present invention or equivalent to the scope of the present invention are encompassed by the present invention.

Claims

1. A Z-arm air suspension without thrust and beam, characterized in that: The invention comprises a Z-shaped arm (3), a lightweight leaf spring seat (5), an upper bridge seat (7), a flattened riding bolt (8), a thickened flange nut (9), an integrated lower bridge seat (10), a lightweight limit assembly (12), an air bag upper bracket (13), a leaf spring pressure block (14), a clamping block (15), a stepped pin (16), and a lightweight shock absorber upper bracket (17). The Z-shaped arm (3) is in a Z-shape as a whole, and a high-rigidity bushing (101) is provided at its front end. Two lightweight leaf spring seats (5) are symmetrically fixed on the left and right sides of the vehicle frame (4). The front end of the Z-shaped arm (3) is connected to the lightweight leaf spring seat (5) through the high-rigidity bushing (101) and the stepped pin (16), and the end is connected to the air spring assembly (6) through bolts. The upper end of the air spring assembly (6) is connected to the air bag upper bracket (13) through the air bag upper bracket (14). The vehicle frame (4) is connected to the two front Z-shaped arms (3) by means of a leaf spring pressure block (14), a flattened riding bolt (8), a thickened flange nut (9), a bridge upper seat (7) and an integrated bridge lower seat (10), and the two rear Z-shaped arms (3) are fixedly connected to one end of the rear axle (2) by means of a leaf spring pressure block (14), a flattened riding bolt (8), a thickened flange nut (9), a bridge upper seat (7) and an integrated bridge lower seat (10), and the Z-shaped arms (3) and the middle axle (1) or the rear axle (2) form a "U"-shaped structure as a whole; a shock absorber assembly (11) is arranged on the inner side of the middle axle (1) and the rear axle (2), and the shock absorber assembly (11) is connected to the vehicle frame (4) at the top through a lightweight shock absorber upper bracket (17), and is connected to the bridge at the bottom through an integrated bridge lower seat (10).

2. The Z-arm air suspension without thruster and beam according to claim 1 is characterized in that: A central bolt (102) and a pin (103) are provided in the middle of the Z-shaped arm (3), and the central bolt (102) and the pin (103) are assembled and positioned with the leaf spring pressure block (14) and the bridge seat (7). Four clamping blocks (15) are respectively provided on the upper and lower sides of the left and right sides of both ends of the bridge to be assembled and positioned with the bridge seat (7) and the integrated bridge lower seat (10). A lightweight limit assembly (12) is provided on the vehicle frame (4) directly above the leaf spring pressure block (14); baffles are provided on the left and right sides of the bridge seat (7) to limit the mutual displacement of the middle bridge (1) and the rear bridge (2) relative to the Z-shaped arm (3), and the bridge seat (7) and the integrated bridge lower seat (10) are limited in lateral displacement by a total of four clamping blocks (15) on the upper and lower sides of the middle bridge (1) or the rear bridge (2).

3. The Z-arm air suspension without thruster and beam according to claim 1, characterized in that: The Z-shaped arm (3) is made of spring steel material, and is formed by curling two front sides to form curled ears. The entire section is made of sheet materials of unequal thickness stacked together, and the first sheet is "Z"-shaped. The side edge of the end leaf spring and the bottom edge of the "Z"-shaped leaf spring form an angle of 28±1°, and are fixed by a central bolt (102) and a pin (103).

4. The Z-arm air suspension without thruster and beam according to claim 1, characterized in that: A total of four left-right symmetrical lightweight limit assemblies (12) are arranged between the middle bridge (1) and the rear bridge (2) and the vehicle frame (4), and are located directly above the leaf spring pressure block (14), thereby ensuring the suspension jump limit, and a weight reduction hole is arranged in the middle of the structure.

5. The Z-arm air suspension without thruster or crossbeam according to any one of claims 1 to 4, characterized in that: The middle bridge (1) and the rear bridge (2) are each provided with two large-rigidity air spring assemblies (6) on the left and right, and the shock absorber assembly (11) is arranged on the inner side of the vehicle frame (4).

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