Plate spring suspension assembly

Abstract

According to the plate spring suspension assembly, hub supports are installed at the two ends of a large shaft in the length direction, reinforcing pieces are arranged on the hub supports, and reinforcing cavities are defined by the reinforcing pieces and the hub supports; the plate spring is fixed on the large shaft through a plate spring seat; two ends of the plate spring are connected with a frame; the tray comprises a buffer plate and two connecting plates which are connected to the two opposite sides of the buffer plate in a one-to-one correspondence mode, the two connecting plates are gradually close to each other in the direction away from the buffer plate, and the ends of the two connecting plates are both installed on the large shaft. The lateral impact resistance and the bending resistance of the hub support are effectively improved, and the problem that the weight and the cost are increased due to thickening and widening of the hub support is solved; the risk of tray crushing is effectively avoided, and the structural stability of the tray is improved.

Description

Technical Field

[0001] The present application relates to the technical field of automobile suspension, and in particular to a leaf spring suspension assembly. Background Art

[0002] Leaf spring suspension is a traditional vehicle suspension system consisting of leaf springs, leaf spring mounting plates, axles, wheel hub brackets, bump stops, bump stop trays, and shock absorbers. It is suitable for vehicles with heavy loads and in harsh road conditions. Furthermore, the number, thickness, and width of leaf springs can be adjusted to improve the load-bearing capacity of the leaf spring suspension and meet varying load requirements.

[0003] The leaf spring is generally composed of several pieces of alloy spring steel of unequal length to form a spring beam of approximately equal strength. One end of the leaf spring is fixed to the frame through a bushing, and the other end is fixed to the lifting ear through a bushing. The middle is fixed to the leaf spring mounting plate through a U-bolt, which can not only play a buffering role, but also transmit all-directional loads and guide functions; the main shaft is made of a hollow tubular beam, with wheel hub brackets at both ends, and the wheel hub bearings are installed on the wheel hub bracket and used to connect the wheel hub. The main shaft mainly plays a bridging role, distributing the load transmitted from the wheel center to the leaf spring and buffer block. There is a height difference of about 100mm between the wheel center and the center of the main axle. This height difference will cause the wheel hub bracket to generate bending moment when it is subjected to lateral impact force. In order to improve the bending resistance, the traditional method is to thicken and widen the wheel hub bracket, which will increase the weight and production cost; the buffer block is generally installed on the frame, and the corresponding tray is installed on the main axle at the same time. It is used to contact the buffer block and play a limiting role in the process of the suspension driving the main axle to jump. However, when the suspension jumps to the extreme position, the tray will crush the buffer block. At this time, the tray will be subjected to a very extreme load. Since the contact surface of the tray is larger than the cross-section of the buffer block, part of it will be suspended in the air, and the suspended part will be at risk of crushing. Summary of the Invention

[0004] The present application provides a leaf spring suspension assembly to solve the problems existing in the prior art, effectively increase the wheel hub bracket's ability to resist lateral impact and bending, avoid the problems of increased weight and cost caused by thickening and widening the wheel hub bracket; effectively avoid the risk of tray crushing and increase the tray's structural stability.

[0005] The leaf spring suspension assembly provided in the present application includes: a main shaft, wherein wheel hub brackets are installed at both ends of the main shaft along the length, and a reinforcement is provided on the wheel hub bracket, and the reinforcement and the wheel hub bracket define a reinforcement cavity; a leaf spring, wherein the leaf spring is fixed to the main shaft through a leaf spring seat, and the two ends of the leaf spring are used to be connected to the vehicle frame; a tray, wherein the tray includes a buffer plate and two connecting plates respectively connected to two sides of the buffer plate respectively arranged opposite to each other, the two connecting plates gradually approach each other in the direction away from the buffer plate, and the ends of the two connecting plates are respectively installed on two sides of the main shaft arranged opposite to each other.

[0006] Optionally, the reinforcement member includes a first reinforcement plate, a second reinforcement plate and a third reinforcement plate connected between the first reinforcement plate and the second reinforcement plate; the side edges of the first reinforcement plate and the second reinforcement plate are both installed on the wheel hub bracket, and the two connecting side edges of the third reinforcement plate that are relatively arranged are respectively installed on the first reinforcement plate and the second reinforcement plate in a one-to-one correspondence to define the reinforcement cavity together with the wheel hub bracket.

[0007] Optionally, a top edge of the third reinforcing plate located between the two connecting side edges is bent toward the wheel hub bracket and fixed to the wheel hub bracket.

[0008] Optionally, the inner side wall of the first reinforcing plate and the inner side wall of the second reinforcing plate are fixed on two opposite side walls of the main shaft respectively, and the bottom edge of the third reinforcing plate is fixed on the top wall of the main shaft.

[0009] Optionally, the leaf spring seat includes a mounting surface, a first limiting opening and a second limiting opening, the mounting surface is used to support the leaf spring, the first limiting opening is fixed on the reinforcement, and the second limiting opening is fixed on the main shaft.

[0010] Optionally, the leaf spring seat includes a seat plate and a mounting plate that are bent and connected, and the angle between the seat plate and the mounting plate is an obtuse angle; the first limit opening is opened on the side of the seat plate facing away from the mounting plate, and the mounting surface is located on the seat plate; the second limit opening is opened on the side of the mounting plate facing away from the seat plate.

[0011] Optionally, two oppositely arranged support legs are installed on the side of the seat plate facing away from the mounting surface; the inner edges of the two support legs are respectively fixed on two oppositely arranged side walls of the main shaft.

[0012] Optionally, both of the support legs extend obliquely in a direction away from the mounting plate.

[0013] Optionally, the support leg includes an inclined plate and two support plates located on opposite sides of the inclined plate, the edges of the two support plates away from the inclined plate are fixed on the side walls of the main shaft, and the bottom edges of the inclined plates abut against the side walls of the main shaft.

[0014] Optionally, the main shaft is a hollow rectangular tube beam, a square hole is opened on the wheel hub bracket, and the main shaft is welded and fixed in the square hole.

[0015] The above technical solution has the following beneficial effects:

[0016] The leaf spring suspension assembly provided in the present application can effectively increase the lateral impact resistance and bending resistance of the wheel hub bracket by arranging a reinforcement member on the wheel hub bracket to form a reinforcement cavity between the reinforcement member and the wheel hub bracket, avoiding the problems of increased weight and cost caused by thickening and widening the wheel hub bracket, and is conducive to lightweighting of the vehicle; the tray is bent inward by two connecting plates and fixed to the main shaft, which is equivalent to adding oblique support, which can effectively avoid the risk of crushing and increase the structural stability of the tray. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The preferred embodiments of the present application will be described in detail below with reference to the accompanying drawings to help understand the purpose and advantages of the present application, wherein:

[0018] Figure 1 A schematic structural diagram of a leaf spring suspension assembly provided in an optional embodiment of the present application.

[0019] Figure 2 A front view of a hub bracket provided for an alternative embodiment of the present application.

[0020] Figure 3 A rear view of a hub bracket provided for an optional embodiment of the present application.

[0021] Figure 4 A schematic structural diagram of a tray provided in an optional embodiment of the present application.

[0022] Figure 5 A top view of a leaf spring seat provided for an alternative embodiment of the present application.

[0023] Figure 6 A bottom view of a leaf spring seat provided for an alternative embodiment of the present application.

[0024] Figure 7 A schematic structural diagram of a leaf spring provided in an optional embodiment of the present application.

[0025] Description of reference numerals:

[0026] 1-large shaft; 2-wheel hub bracket, 20-square hole;

[0027] 3-reinforcement member, 30-first reinforcement plate, 31-second reinforcement plate, 32-third reinforcement plate, 320-connecting side, 33-weight reduction hole;

[0028] 4-leaf spring, 40-first reed, 41-second reed, 42-hanging ear, 43-coiled ear, 44-riding bolt;

[0029] 5-leaf spring seat, 50-mounting surface, 51-first limiting opening, 52-second limiting opening, 53-seat plate, 54-mounting plate, 55-support leg, 550-inclined plate, 551-support plate;

[0030] 6-tray, 60-buffer plate, 61-connecting plate;

[0031] 7-Shock absorber. DETAILED DESCRIPTION

[0032] The technical solution of the present invention is further described in detail below through examples and in conjunction with the accompanying drawings. Directional terms such as "up," "down," "left," "right," "front," "back," "front," "back," "top," and "bottom" mentioned or potentially mentioned in this specification are defined relative to the configurations shown in the accompanying drawings. The terms "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively. These are relative concepts and may vary depending on the location and usage of the component. Therefore, these and other directional terms should not be construed as restrictive.

[0033] The present application provides a leaf spring suspension assembly, comprising: a main shaft 1, a hub bracket 2 mounted on the main shaft 1, a leaf spring 4 and a tray 6.

[0034] Please refer to Figures 1 to 3 The main shaft 1 is equipped with hub brackets 2 at both ends along its length. The hub bracket 2 is provided with a reinforcement 3. The reinforcement 3 and the hub bracket 2 define a reinforcement cavity. The cavity structure of the reinforcement cavity can effectively improve the structural strength of the hub bracket 2, thereby improving the bending resistance.

[0035] The wheel hub bracket 2 mainly bears the wheel center load and has a large load-bearing capacity. The wheel hub bracket 2 can be optionally made of a casting to increase the structural strength of the wheel hub bracket 2.

[0036] Please refer to Figure 1 The leaf spring 4 is fixed to the main axle 1 via a leaf spring seat 5, with both ends of the leaf spring 4 connected to the vehicle frame. Optionally, the leaf spring 4 includes two stacked first and second spring leaves 40, 41. The first spring leaf 40 is provided with a lifting lug 42 and a coiling lug 43 at each end, respectively. Both the lifting lug 42 and the coiling lug 43 are bolted to the vehicle frame. The middle portion is fixed to the leaf spring seat 5 via a saddle bolt 44 (U-bolt), which acts as a lever to transmit the wheel center force to the frame end and then to the relevant area of ​​the vehicle body.

[0037] After the riding bolt 44 is clamped on the leaf spring 4 , the end of the riding bolt 44 is connected to the leaf spring seat 5 by a bolt to achieve the fastening of the leaf spring 4 .

[0038] Please refer to Figure 4 The tray 6 includes a buffer plate 60 and two connecting plates 61 respectively connected to the two sides of the buffer plate 60. The two connecting plates 61 gradually approach each other in the direction away from the buffer plate 60, and the ends of the two connecting plates 61 are respectively installed on the two sides of the main shaft 1 that are opposite to each other.

[0039] The two connecting plates 61 of the tray 6 have a tapered structure in the direction away from the buffer plate 60, which can provide oblique support for the buffer plate 60. The two connecting plates 61 are respectively welded and fixed on the two side walls opposite to each other of the main shaft 1. Compared with the technical solution of adding additional oblique support, the number of welds is effectively reduced, the support strength of the tray 6 is increased, and the durability of the tray 6 is improved.

[0040] The leaf spring suspension assembly provided in the present application can effectively increase the lateral impact resistance and bending resistance of the wheel hub bracket 2 by arranging a reinforcement member 3 on the wheel hub bracket 2 to form a reinforcement cavity between the reinforcement member 3 and the wheel hub bracket 2, avoiding the problems of increased weight and cost caused by thickening and widening the wheel hub bracket 2, which is conducive to the lightweighting of the vehicle; the tray 6 is bent inwardly through two connecting plates 61 and fixed to the two opposite sides of the main shaft 1, which is equivalent to adding oblique support, which can effectively avoid the risk of crushing and increase the structural stability of the tray 6.

[0041] In an optional embodiment, the reinforcement member 3 includes a first reinforcement plate 30, a second reinforcement plate 31, and a third reinforcement plate 32 connected between the first reinforcement plate 30 and the second reinforcement plate 31; the side edges of the first reinforcement plate 30 and the second reinforcement plate 31 are both mounted on the wheel hub bracket 2, and the two connecting side edges 320 arranged opposite to each other on the third reinforcement plate 32 are respectively mounted on the first reinforcement plate 30 and the second reinforcement plate 31 in a one-to-one correspondence, and together with the wheel hub bracket 2, define the reinforcement cavity. The reinforcement cavity is located on one side of the wheel hub bracket 2 and is defined by the side of the wheel hub bracket 2, the first reinforcement plate 30, the second reinforcement plate 31, and the third reinforcement plate, supporting the wheel hub bracket 2 from one side of the wheel hub bracket 2. In addition, only three reinforcement plates are required, which reduces the material consumption and reduces the cost compared to increasing the thickness of the wheel hub bracket 2 as a whole.

[0042] Optionally, weight-reducing holes 33 may be provided on the first reinforcing plate 30 , the second reinforcing plate 31 and the third reinforcing plate 32 to further reduce weight.

[0043] In an optional embodiment, the top edge of the third reinforcing plate 32 located between the two connecting side edges 320 is bent toward the hub bracket 2 and fixed to the hub bracket 2. Figure 2 As shown, the third reinforcing plate 32 supports the first reinforcing plate 30 and the second reinforcing plate 31 through two connecting side edges 320 , and is mounted on the hub bracket 2 through abutment with the top edge, while providing stable support for the hub bracket 2 .

[0044] In an optional embodiment, the inner sidewalls of the first reinforcing plate 30 and the inner sidewalls of the second reinforcing plate 31 are fixed to opposite sidewalls of the main shaft 1, respectively, and the bottom edge of the third reinforcing plate 32 is fixed to the top wall of the main shaft 1. All three reinforcing plates are connected between the main shaft 1 and the wheel hub bracket 2, achieving structural reinforcement and multi-path force transmission for the main shaft 1 and the wheel hub bracket 2, significantly improving the structural strength and bending resistance of the wheel hub bracket 2 and the main shaft 1.

[0045] In an alternative embodiment, see Figure 1 、 Figures 4 and 5 The leaf spring seat 5 includes a mounting surface 50, a first limiting opening 51, and a second limiting opening 52. The mounting surface 50 supports the leaf spring 4. The first limiting opening 51 is fixed to the reinforcement member 3, and the second limiting opening 52 is fixed to the main shaft 1. The leaf spring seat 5 not only bears the vertical load of the leaf spring 4 but also withstands longitudinal load impacts. The first limiting opening 51 secures the leaf spring seat 5 to the reinforcement member 3 of the hub bracket 2. By securing the first limiting opening 51 to two opposing side surfaces of the main shaft 1, the impact on the leaf spring seat 5 is effectively distributed to the main shaft 1 and the reinforcement member 3 of the hub bracket 2, further enhancing its load-bearing capacity.

[0046] In an optional embodiment, the leaf spring seat 5 includes a seat plate 53 and a mounting plate 54, which are connected by a bend. The angle between the seat plate 53 and the mounting plate 54 is obtuse. The first retaining opening 51 is defined on the side of the seat plate 53 facing away from the mounting plate 54, and the mounting surface 50 is located on the seat plate 53. The second retaining opening 52 is defined on the side of the mounting plate 54 facing away from the seat plate 53. The leaf spring seat 5 is formed into a substantially π-shaped structure, with the obtuse angle between the seat plate 53 and the mounting plate 54. The mounting plate 54 provides oblique support for the seat plate 53, thereby enhancing the support provided to the seat plate 53.

[0047] Furthermore, the two opposite side walls of the first limiting opening 51 are welded to the outer walls of the first reinforcing plate 30 and the second reinforcing plate 31 in a one-to-one correspondence, which can increase the uniformity of the force transmitted from the first limiting opening 51 to the reinforcing member 3.

[0048] In an optional embodiment, two opposing support legs 55 are mounted on the side of the seat plate 53 facing away from the mounting surface; the inner edges of the two support legs 55 are respectively fixed to two opposite side walls of the main shaft 1. The two support legs 55 also support the seat plate 53, further increasing the structural stability of the seat plate 53.

[0049] In an optional embodiment, both supporting legs 55 extend obliquely away from the mounting plate 54. The two supporting legs 55 also provide oblique support for the seat plate 53 and, together with the mounting plate 54, support the seat plate 53 from both sides along the length of the main shaft 1, thereby increasing the structural stability of the seat plate 53.

[0050] In an optional embodiment, the support leg 55 includes an inclined plate 550 and two support plates 551 located on opposite sides of the inclined plate 550. The edges of the two support plates 551 away from the inclined plate 550 are fixed to the side wall of the main shaft 1, and the bottom edge of the inclined plate 550 abuts against the side wall of the main shaft 1. Figure 5 and Figure 6 As shown, both the inclined plate 550 and the support plate 551 are mounted on the base plate 53. The inclined plate 550 and the two support plates 551 are fixed to the main shaft 1 on three surfaces. The interaction between these components increases the load-bearing capacity. Furthermore, the support legs 55 form a U-shaped structure, defining a cavity at the connection with the main shaft 1, which increases the structural stability of the connection.

[0051] In an optional embodiment, the leaf spring suspension assembly further includes a shock absorber 7, which is mounted on the main shaft 1. Figure 1 The shock absorber 7 is fixedly connected to the bottom of the main shaft 1 to reduce the shock of the leaf spring 4 suspension.

[0052] In an optional embodiment, the main shaft 1 is a hollow rectangular tubular beam, the wheel hub bracket 2 is provided with a square hole 20, and the main shaft 1 is welded and fixed in the square hole 20. The hollow structure of the rectangular tubular beam reduces weight, and the rectangular tubular beam is welded and fixed to the wall of the square hole 20 of the wheel hub bracket 2, thereby increasing the structural stability of the connection between the wheel hub bracket 2 and the main shaft 1.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A leaf spring suspension assembly, characterized in that: include: A main shaft, wherein hub brackets are installed at both ends of the main shaft along the length, and a reinforcement member is provided on the hub bracket, and the reinforcement member and the hub bracket define a reinforcement cavity; A leaf spring, wherein the leaf spring is fixed to the main shaft via a leaf spring seat, and both ends of the leaf spring are used to connect to the vehicle frame; The pallet includes a buffer plate and two connecting plates respectively connected to the two sides of the buffer plate in a one-to-one correspondence. The two connecting plates gradually approach each other in the direction away from the buffer plate, and the ends of the two connecting plates are respectively installed on the two sides of the main shaft that are opposite to each other.

2. The leaf spring suspension assembly according to claim 1, characterized in that: The reinforcement member includes a first reinforcement plate, a second reinforcement plate and a third reinforcement plate connected between the first reinforcement plate and the second reinforcement plate. The side edges of the first reinforcing plate and the second reinforcing plate are both mounted on the hub bracket, and the two oppositely arranged connecting side edges of the third reinforcing plate are respectively mounted on the first reinforcing plate and the second reinforcing plate in a one-to-one correspondence to define the reinforcing cavity together with the hub bracket.

3. The leaf spring suspension assembly according to claim 2, characterized in that: The top edge of the third reinforcing plate located between the two connecting side edges is bent toward the wheel hub bracket and is fixed to the wheel hub bracket.

4. The leaf spring suspension assembly according to claim 3, characterized in that: The inner side walls of the first reinforcing plate and the inner side walls of the second reinforcing plate are fixed on two opposite side walls of the large shaft respectively, and the bottom edge of the third reinforcing plate is fixed on the top wall of the large shaft.

5. The leaf spring suspension assembly according to claim 1, characterized in that: The leaf spring seat includes a mounting surface, a first limiting opening, and a second limiting opening. The mounting surface is used to support the leaf spring. The first limiting opening is fixed on the reinforcement member, and the second limiting opening is fixed on the main shaft.

6. The leaf spring suspension assembly according to claim 5, characterized in that: The leaf spring seat comprises a seat plate and a mounting plate connected by bending, and the angle between the seat plate and the mounting plate is an obtuse angle; The first limiting opening is provided on a side of the seat plate facing away from the mounting plate, and the mounting surface is located on the seat plate; The second limiting opening is provided on a side of the mounting plate facing away from the seat plate.

7. The leaf spring suspension assembly according to claim 6, characterized in that: Two supporting legs arranged opposite to each other are installed on the side of the seat plate facing away from the mounting surface; The inner edges of the two supporting legs are respectively fixed on two side walls of the main shaft that are arranged opposite to each other.

8. The leaf spring suspension assembly according to claim 7, characterized in that: The two supporting legs are both extended obliquely in a direction away from the mounting plate.

9. The leaf spring suspension assembly according to claim 7, characterized in that: The support leg includes an inclined plate and two support plates located on opposite sides of the inclined plate. The edges of the two support plates away from the inclined plate are fixed to the side walls of the main shaft, and the bottom edges of the inclined plates abut against the side walls of the main shaft.

10. The leaf spring suspension assembly according to claim 8, characterized in that: The main shaft is a hollow rectangular tube beam, a square hole is opened on the wheel hub bracket, and the main shaft is welded and fixed in the square hole.

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