Automobile rear axle reinforcing structure

Abstract

The invention discloses an automobile rear axle reinforcing structure which comprises a rear axle body, spring seats are arranged on the two sides of the surface of the rear axle body, a reinforcing supporting rod is fixedly connected to one side of the rear axle body, a reinforcing protection plate mechanism is fixedly installed on one side of the reinforcing supporting rod, and supporting assemblies used for installing buffering mechanisms are fixedly installed at the tops of the two spring seats. The tops of the two supporting assemblies are fixedly connected with base assemblies, the interiors of the two base assemblies are slidably connected with spring rod assemblies, two reinforcing connecting plates are fixedly connected between the rear axle body and the reinforcing supporting rods, and the tops of the two reinforcing connecting plates are provided with buffering mechanisms used for buffering. According to the device, part of impact force shared by the base assembly and the spring rod assembly is counteracted, the comfort of automobile driving is further enhanced, part of impact force borne by the rear axle body is transferred to the reinforcing supporting rods, and the strength of the rear axle body is indirectly enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive engineering, and particularly to a reinforced structure for an automotive rear axle. Background Art

[0002] In the initial stage of the birth of automobiles, the structure was relatively simple, and the power system and transmission system were also relatively primitive. At that time, the rear axle structure was mainly improved based on the suspension and transmission principles of carriages, using a rigid axle type rear axle, which mainly consisted of a solid axle and a simple suspension device. This kind of rear axle could meet the basic load-bearing and transmission requirements, but it performed poorly in terms of driving comfort and handling. With the development of technology, as the speed and load requirements of automobiles increased, the design of the main reducer was continuously optimized. Starting from the initial simple gear reduction mechanism, it developed to use high-precision gears such as hypoid gears and spiral bevel gears, improving the transmission efficiency, reducing noise and wear, and being able to adapt to different vehicle speeds and torques. Pickup trucks are relatively common in our lives and can be used for household and cargo transportation, with a wide range of uses. When a pickup truck is used for cargo transportation, the strength requirements for the automotive rear axle are often relatively high. Therefore, a reinforced structure for an automotive rear axle is needed;

[0003] The existing automotive rear axle reinforcement structures generally weld reinforcement plates at positions such as the main beam and side beam of the automotive rear axle, or add connecting parts to the rear axle to transfer the load on the automotive rear axle to the rear floor skeleton to avoid stress concentration on the rear axle. However, the above common automotive rear axle reinforcement structures still have deficiencies:

[0004] Although the automotive rear axle can be strengthened to a certain extent by simply enhancing its rigidity, it will sacrifice a part of the driving comfort of the vehicle, resulting in a poor riding experience, and the bumpiness on complex roads is relatively strong. Moreover, since the bridge shell in the middle of the automotive rear axle is relatively low from the ground, it is easy to be scratched, resulting in cracks in the middle bridge shell of the automotive rear axle. Summary of the Invention

[0005] The purpose of the present invention is to provide a reinforced structure for an automotive rear axle to solve the problems raised in the above background art. Although the automotive rear axle can be strengthened to a certain extent by simply enhancing its rigidity, it will sacrifice a part of the driving comfort of the vehicle, resulting in a poor riding experience, and the bumpiness on complex roads is relatively strong. Moreover, since the bridge shell in the middle of the automotive rear axle is relatively low from the ground, it is easy to be scratched, resulting in cracks in the middle bridge shell of the automotive rear axle.

[0006] To achieve the above object, the present invention provides the following technical solution: An automotive rear axle strengthening structure includes a rear axle body. On both sides of the surface of the rear axle body, spring seats are provided. On one side of the rear axle body, a strengthening support rod is fixedly connected. On one side of the strengthening support rod, a strengthening guard plate mechanism is fixedly installed. On the top of both spring seats, support components for installing a buffer mechanism are fixedly installed. On the top of both support components, base components are fixedly connected. Inside both base components, spring rod components are slidably connected. Between the rear axle body and the strengthening support rod, two strengthening connecting plates are fixedly connected. On the top of both strengthening connecting plates, buffer mechanisms for buffering are provided.

[0007] Preferably, the strengthening guard plate mechanism includes an arc-shaped guard plate. On the surface of the arc-shaped guard plate, a connecting pad is fixedly connected. The surface of the connecting pad is in contact connection with the surface of the rear axle body. On both sides of the arc-shaped guard plate, bottom connecting plates are fixedly connected. On the top of both bottom connecting plates, connecting pull rods are fixedly connected by bolts. One end of both connecting pull rods is fixedly connected to one side of the strengthening support rod. One end of the arc-shaped guard plate is fixedly connected with a connecting component, which is beneficial to protecting the middle bridge shell of the automotive rear axle and preventing damage.

[0008] Preferably, the connecting component includes a connecting support plate. The connecting support plate is fixedly connected to the arc-shaped guard plate. On the surface of the arc-shaped guard plate, a strengthening rib is fixedly connected. One end of the connecting support plate is fixedly connected to the strengthening support rod, which can transfer part of the force received by the rear axle body to the strengthening support rod.

[0009] Preferably, the support component includes a support box. The support box is fixedly connected to the spring seat. On both sides of the inner wall of the support box, strengthening strips are fixedly connected, which is beneficial to installing this component without interfering with the installation of the leaf spring.

[0010] Preferably, the base component includes a shock-absorbing block. In the middle of the shock-absorbing block, a shock-absorbing cavity is provided. On one side of the shock-absorbing block, a limiting sliding groove is provided.

[0011] Preferably, the spring rod component includes a shock-absorbing support rod. The shock-absorbing support rod is slidably connected inside the shock-absorbing cavity. One end of the shock-absorbing support rod is fixedly connected with a vehicle body connecting plate. Between the vehicle body connecting plate and the shock-absorbing block, a shock-absorbing spring is fixedly connected. On the surface of the shock-absorbing support rod, a connecting piece is fixedly connected, which is beneficial to providing a certain shock-absorbing effect when the vehicle is running.

[0012] Preferably, the connecting piece includes a limiting slider. The limiting slider is installed on the shock-absorbing support rod. One end of the limiting slider is provided with a second connecting seat. The surface of the limiting slider is slidably connected with the inner wall of the limiting sliding groove.

[0013] Preferably, the buffer mechanism includes a reinforcing support plate fixedly connected between two reinforcing connecting plates. On both sides of the top of the reinforcing support plate, mounting support plates are fixedly connected. On one side of each of the two mounting support plates, a hydraulic buffer is fixedly installed. On both sides of the surface of the reinforcing support plate, sliding grooves are formed. The output end of the hydraulic buffer is fixedly installed with a slider assembly, and one end of the slider assembly is rotatably connected to a connecting rod assembly, which is beneficial to offset part of the impact force received by the vehicle body. And this device is installed on the reinforcing support rod and can share the force received by the rear axle body.

[0014] Preferably, the sliding assembly includes a buffer support plate. One end of the buffer support plate is fixedly connected with a sliding block, and the surface of the sliding block is slidably connected with the inside of the sliding groove. One side of the buffer support plate is fixedly connected with a first connecting seat.

[0015] Preferably, the connecting rod assembly includes an intermediate connecting rod. One end of the intermediate connecting rod is fixedly connected with a first connecting rotating rod, and the other end of the intermediate connecting rod is fixedly connected with a second connecting rotating rod. The first connecting rotating rod is rotatably connected to the first connecting seat, transmitting the force received by the vehicle body to the buffer assembly, and transmitting part of the force received by the vehicle body to the reinforcing support rod to enhance the strength of the rear axle body.

[0016] Compared with the prior art, the beneficial effects of the present invention are: adding a reinforcing support rod at the same horizontal position of the original automobile rear axle, and connecting the original automobile rear axle and this reinforcing support rod together through a reinforcing connecting plate, and the connection point is at the connection point in the middle of the axle housing, which can greatly enhance the strength of the connection point;

[0017] At the middle position of the automobile rear axle, gears and other components are installed inside the axle housing. A reinforcing guard plate mechanism is provided to protect this position of the automobile rear axle to prevent scratches from causing cracks on the surface. At the same time, through the connecting pull rod and the connecting support plate, part of the force received by the rear axle body is shared to enhance the strength of the automobile rear axle;

[0018] Through the base assembly and the spring rod assembly, part of the force of the vehicle body is shared, and it can play a certain shock-absorbing role to ensure the comfort of riding and driving when the vehicle is in use. And a buffer mechanism is provided on the reinforcing support rod, and the buffer mechanism is associated with the base assembly and the spring rod assembly. The buffer mechanism offsets part of the impact force shared by the base assembly and the spring rod assembly, further enhancing the comfort of automobile driving, and transferring part of the impact force received by the rear axle body to the reinforcing support rod to indirectly enhance the strength of the rear axle body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the front view structure diagram of the automobile rear axle strengthening structure of the present invention;

[0020] Figure 2 This is the bottom structure diagram of the automobile rear axle strengthening structure of the present invention;

[0021] Figure 3 This is the side structure diagram of the automobile rear axle strengthening structure of the present invention;

[0022] Figure 4 This is the structure diagram of the support and base assembly of the automobile rear axle strengthening structure of the present invention;

[0023] Figure 5 This is the structure diagram of the connecting rod assembly of the automobile rear axle strengthening structure of the present invention;

[0024] Figure 6 This is the structure diagram of the spring rod assembly of the automobile rear axle strengthening structure of the present invention;

[0025] Figure 7 This is the structure diagram of the hydraulic buffer of the automobile rear axle strengthening structure of the present invention;

[0026] Figure 8 This is the structure diagram of the strengthening guard plate mechanism of the automobile rear axle strengthening structure of the present invention.

[0027] In the figure: 1, rear axle body; 2, strengthening support rod; 3, spring seat; 4, arc-shaped guard plate; 5, connecting pad; 6, connecting support plate; 7, connecting pull rod; 8, strengthening rib; 9, strengthening connecting plate; 10, strengthening support plate; 11, sliding groove; 12, mounting support plate; 13, hydraulic buffer; 14, buffer support plate; 15, sliding block; 16, first connecting seat; 17, support box; 18, strengthening strip; 19, shock-absorbing block; 20, shock-absorbing cavity; 21, limit sliding groove; 22, shock-absorbing support rod; 23, limit sliding block; 24, second connecting seat; 25, vehicle body connecting plate; 26, shock-absorbing spring; 27, first connecting rotating rod; 28, intermediate connecting rod; 29, second connecting rotating rod; 30, bottom connecting plate. Detailed implementation manners

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0029] Please refer to Figure 1-8 , the present invention provides an automobile rear axle strengthening structure, including a rear axle body 1. On both sides of the surface of the rear axle body 1, spring seats 3 are provided. On one side of the rear axle body 1, a strengthening support rod 2 is fixedly connected. On one side of the strengthening support rod 2, a strengthening guard plate mechanism is fixedly installed. On the top of both spring seats 3, support components for installing a buffer mechanism are fixedly installed. On the top of both support components, base components are fixedly connected. Inside both base components, spring rod components are slidably connected. Between the rear axle body 1 and the strengthening support rod 2, two strengthening connecting plates 9 are fixedly connected. On the top of both strengthening connecting plates 9, buffer mechanisms for buffering are provided.

[0030] During use, by adding the reinforcing strut 2 and connecting the reinforcing strut 2 and the rear axle body 1 into a whole through the reinforcing connecting plate 9, on this basis, the rear axle body 1 can be strengthened to a certain extent, and the reinforcing strut 2 can be made of a high-strength material with a relatively light weight, or on the premise of not affecting the strength of the reinforcing strut 2, the hollowing process can be adopted to reduce the weight of the reinforcing strut 2, so that the overall weight of the rear axle body 1 will not increase significantly.

[0031] Refer to Figure 1 、 Figure 2 and Figure 8 Furthermore, the reinforcing guard plate mechanism includes an arc-shaped guard plate 4. A connecting pad 5 is fixedly connected to the surface of the arc-shaped guard plate 4, and the surface of the connecting pad 5 is in contact connection with the surface of the rear axle body 1. Bottom connecting plates 30 are fixedly connected to both sides of the arc-shaped guard plate 4. Connecting pull rods 7 are fixedly connected to the tops of the two bottom connecting plates 30 through bolts. One ends of the two connecting pull rods 7 are fixedly connected to one side of the reinforcing strut 2. A connecting component is fixedly connected to one end of the arc-shaped guard plate 4. The connecting component includes a connecting support plate 6. The connecting support plate 6 is fixedly connected to the arc-shaped guard plate 4. A reinforcing rib 8 is fixedly connected to the surface of the arc-shaped guard plate 4. One end of the connecting support plate 6 is fixedly connected to the reinforcing strut 2;

[0032] During use, the connecting pad 5 is attached to the surface of the axle housing in the middle of the rear axle body 1. There are transmission gears and other components inside this axle housing, and the axle housing at this position is relatively low from the ground. Therefore, when the pickup truck is driving on a poor road condition, objects such as stones on the ground are likely to scrape the surface of the axle housing at this position, and this position of the rear axle body 1 also bears a large stress. Therefore, cracks are likely to occur on the surface of the axle housing at this position. The connecting pull rod 7 and the connecting support plate 6 are fixed to the side and bottom of the reinforcing strut 2 through bolts. The arc-shaped guard plate 4 can provide good protection. And the connecting pad 5 arranged between the arc-shaped guard plate 4 and the surface of the axle housing is a soft material, which can reduce the impact force on the rear axle body 1 when the arc-shaped guard plate 4 is impacted by the ground terrain, which is beneficial to protecting the rear axle body 1. The arc-shaped guard plate 4 and the reinforcing strut 2 are connected together through the connecting pull rod 7. Therefore, the reinforcing strut 2 can share a part of the force received in the middle of the rear axle body 1.

[0033] Refer to Figure 1 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7, Further, the support assembly includes a support box 17, the support box 17 is fixedly connected to the spring seat 3, reinforcing bars 18 are fixedly connected to both sides of the inner wall of the support box 17, the base assembly includes a shock absorber block 19, a shock absorption cavity 20 is formed in the middle of the shock absorber block 19, a limiting sliding groove 21 is formed in one side of the shock absorber block 19, the spring rod assembly includes a shock absorption support rod 22, the shock absorption support rod 22 is slidably connected inside the shock absorption cavity 20, one end of the shock absorption support rod 22 is fixedly connected to a vehicle body connection plate 25, a shock absorption spring 26 is fixedly connected between the vehicle body connection plate 25 and the shock absorber block 19, a connecting member is fixedly connected to the surface of the shock absorption support rod 22, the connecting member includes a limiting slider 23, the limiting slider 23 is installed on the shock absorption support rod 22, a second connection seat 24 is arranged at one end of the limiting slider 23, the surface of the limiting slider 23 is slidably connected to the inner wall of the limiting sliding groove 21, the buffer mechanism includes a reinforcing support plate 10, the reinforcing support plate 10 is fixedly connected between two reinforcing connection plates 9, mounting support plates 12 are fixedly connected to both sides of the top of the reinforcing support plate 10, hydraulic buffers 13 are fixedly installed on one side of each of the two mounting support plates 12, sliding grooves 11 are formed on both sides of the surface of the reinforcing support plate 10, a slider assembly is fixedly installed at the output end of the hydraulic buffer 13, one end of the slider assembly is rotatably connected to a connecting rod assembly, the sliding assembly includes a buffer support plate 14, one end of the buffer support plate 14 is fixedly connected to a sliding block 15, the surface of the sliding block 15 is slidably connected to the inside of the sliding groove 11, a first connection seat 16 is fixedly connected to one side of the buffer support plate 14, the connecting rod assembly includes an intermediate connecting rod 28, one end of the intermediate connecting rod 28 is fixedly connected to a first connecting rotating rod 27, the other end of the intermediate connecting rod 28 is fixedly connected to a second connecting rotating rod 29, and the first connecting rotating rod 27 is rotatably connected to the first connection seat 16;

[0034] In use, on some pickup truck models, a spring seat 3 is provided on the rear axle body 1 for installing leaf springs. Leaf springs are generally formed by stacking multiple spring steel sheets with different lengths and curvatures, and their shape is approximately parabolic. When the vehicle is running, the uneven road surface causes the wheels to move up and down, which compresses or stretches the leaf springs. The leaf springs absorb and buffer these impact forces through their own elastic deformation, converting the vertical vibration of the vehicle into elastic deformation energy of the spring sheets, and then gradually releasing it to make the vehicle run more smoothly. The two ends of the leaf springs are fixedly connected to the vehicle body, bearing most of the weight of the vehicle body and the load. The support box 17 is installed on the spring seat 3, but there is a certain distance between them, and the support box 17 is connected by bolts without interfering with the installation of the leaf springs. Additionally, it is equipped with a reinforcing strip 18 to ensure the support strength of the support box 17. The vehicle body connecting plate 25 is connected to the bottom beam of the vehicle body to bear the vehicle body, and is on the same line as the position connecting the two ends of the leaf springs. When the vehicle body shakes during driving, the vehicle body is subjected to impact forces. At this time, the shock absorber rod 22 slides downward, the shock absorber spring 26 compresses, the second connecting seat 24 rotates relative to the second connecting rod 29, the intermediate connecting rod 28 moves, and the limit slider 23 and the limit sliding groove 21 are used to ensure the stable sliding of the shock absorber rod 22 in a straight line to guarantee the force transmission efficiency. At this time, the movement of the intermediate connecting rod 28 drives the first connecting rod 27 to rotate inside the first connecting seat 16. At this time, the first connecting seat 16 moves horizontally. The movement of the first connecting seat 16 drives the buffer support plate 14 and the end of the hydraulic shock absorber 13 to move. At this time, the piston of the hydraulic shock absorber 13 is forced to move inward. The movement of the piston causes the volume of the hydraulic oil cavity inside the hydraulic shock absorber 13 to decrease. Due to the incompressibility of the hydraulic oil, the oil is forced to flow through specific small holes or gaps to other cavities. During the flow of the oil, a flow resistance will be generated, and this resistance will consume the impact energy, converting the impact kinetic energy into heat energy and internal energy of the oil, thereby slowing down the movement speed of the piston and achieving the buffering effect. In this way, part of the impact force stress transmitted from the vehicle body is offset, providing a better shock absorption effect when the vehicle is running. Moreover, the buffer mechanism is installed on the reinforcing rod 2, which can share part of the force originally received by the rear axle body 1 to the reinforcing rod 2, increasing the service strength of the rear axle body 1. Also, the installation position of the spring seat 3 is appropriately biased towards the position of the reinforcing connecting plate 9. The position of the spring seat 3 is the main position bearing the weight of the vehicle body and the load, so it can also share the force received by the rear axle body 1. The sliding block 15 is slidably connected to the sliding groove 11, which can ensure the movement path of the end of the hydraulic shock absorber 13 and ensure the completion of the buffering work.

[0035] When the embodiment of the present application is in use: on the basis of the rear axle body 1, a reinforcing strut 2 is added, and the original vehicle rear axle and this reinforcing strut 2 are connected together through a reinforcing connecting plate 9, and the connection point is at the connection point in the middle of the axle housing, which can greatly enhance the strength of the connection point. And through the base assembly and the spring rod assembly, part of the force received by the vehicle body is shared, and this part of the force and the potential energy of the shock absorption spring 26 itself are neutralized and offset through the buffer mechanism, ensuring the comfort of riding and driving when the vehicle is in use. And the buffer mechanism is associated with the base assembly and the spring rod assembly, transferring part of the impact force received by the rear axle body 1 to the reinforcing strut 2, indirectly enhancing the strength of the rear axle body 1.

[0036] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An automotive rear axle strengthening structure, comprising a rear axle body (1), characterized in that: On both sides of the surface of the rear axle body (1), spring seats (3) are provided. On one side of the rear axle body (1), a reinforcing strut (2) is fixedly connected. On one side of the reinforcing strut (2), a reinforcing guard plate mechanism is fixedly installed. On the top of both spring seats (3), support components for installing a buffer mechanism are fixedly installed. On the top of both support components, base components are fixedly connected. Inside both base components, spring rod components are slidably connected. Between the rear axle body (1) and the reinforcing strut (2), two reinforcing connecting plates (9) are fixedly connected. On the top of both reinforcing connecting plates (9), buffer mechanisms for buffering are provided.

2. The strengthened structure of an automotive rear axle according to claim 1, wherein: The reinforcing guard plate mechanism includes an arc-shaped guard plate (4). On the surface of the arc-shaped guard plate (4), a connecting pad (5) is fixedly connected. The surface of the connecting pad (5) is in contact connection with the surface of the rear axle body (1). On both sides of the arc-shaped guard plate (4), bottom connecting plates (30) are fixedly connected. On the top of both bottom connecting plates (30), connecting tie rods (7) are fixedly connected by bolts. One end of both connecting tie rods (7) is fixedly connected to one side of the reinforcing strut (2). One end of the arc-shaped guard plate (4) is fixedly connected with a connecting component.

3. The strengthened structure of an automotive rear axle according to claim 2, characterized in that: The connecting component includes a connecting support plate (6). The connecting support plate (6) is fixedly connected to the arc-shaped guard plate (4). On the surface of the arc-shaped guard plate (4), a reinforcing rib (8) is fixedly connected. One end of the connecting support plate (6) is fixedly connected to the reinforcing strut (2).

4. A reinforcing structure for an automotive rear axle according to claim 1, characterized in that: The support component includes a support box (17). The support box (17) is fixedly connected to the spring seat (3). On both sides of the inner wall of the support box (17), reinforcing strips (18) are fixedly connected.

5. The strengthened structure of an automotive rear axle according to claim 1, characterized in that: The base component includes a shock-absorbing block (19). In the middle of the shock-absorbing block (19), a shock-absorbing cavity (20) is opened. On one side of the shock-absorbing block (19), a limiting sliding groove (21) is opened.

6. The enhanced structure of an automotive rear axle according to claim 5, characterized in that: The spring rod component includes a shock-absorbing strut (22). The shock-absorbing strut (22) is slidably connected inside the shock-absorbing cavity (20). One end of the shock-absorbing strut (22) is fixedly connected with a vehicle body connecting plate (25). Between the vehicle body connecting plate (25) and the shock-absorbing block (19), a shock-absorbing spring (26) is fixedly connected. On the surface of the shock-absorbing strut (22), a connecting piece is fixedly connected.

7. The strengthened structure of an automotive rear axle according to claim 6, characterized in that: The connecting piece includes a limiting sliding block (23). The limiting sliding block (23) is installed on the shock-absorbing strut (22). One end of the limiting sliding block (23) is provided with a second connecting seat (24). The surface of the limiting sliding block (23) is slidably connected with the inner wall of the limiting sliding groove (21).

8. A reinforcing structure for an automotive rear axle according to claim 1, characterized in that: The buffer mechanism includes a reinforcing support plate (10), the reinforcing support plate (10) is fixedly connected between two reinforcing connecting plates (9), both sides of the top of the reinforcing support plate (10) are fixedly connected with mounting support plates (12), a hydraulic buffer (13) is fixedly installed on one side of each of the two mounting support plates (12), sliding grooves (11) are formed on both sides of the surface of the reinforcing support plate (10), a slider assembly is fixedly installed at the output end of the hydraulic buffer (13), and one end of the slider assembly is rotatably connected with a connecting rod assembly.

9. The reinforced structure of an automotive rear axle according to claim 8, wherein: The sliding assembly includes a buffer support plate (14), one end of the buffer support plate (14) is fixedly connected with a sliding block (15), the surface of the sliding block (15) is slidably connected with the inside of the sliding groove (11), and one side of the buffer support plate (14) is fixedly connected with a first connecting seat (16).

10. The automotive rear axle reinforcement structure according to claim 9, characterized in that: The connecting rod assembly includes an intermediate connecting rod (28), one end of the intermediate connecting rod (28) is fixedly connected with a first connecting rotating rod (27), the other end of the intermediate connecting rod (28) is fixedly connected with a second connecting rotating rod (29), and the first connecting rotating rod (27) is rotatably connected with the first connecting seat (16).

Images