Rigid rear axle structure and suspension

Abstract

The invention belongs to the technical field of vehicles, and discloses a rigid rear axle structure and a suspende.The rigid rear axle structure comprises a middle axle tube and two axle heads, the rigid rear axle structure is designed to be in a three-section type, the two axle heads are arranged at the two ends of the middle axle tube respectively, each axle head is of an L-shaped structure, and each axle head comprises a transmission part and a mounting part; the mounting part and the transmission part are respectively provided with a first end and a second end, the first end of the transmission part is located below the second end of the transmission part in the height direction of the vehicle body, the first end of the mounting part is connected to the first end of the transmission part, the second end of the mounting part is connected to the intermediate shaft tube, and the mounting part is provided with a bearing surface; the bearing surface is lower than the top of the intermediate shaft tube and is used for bearing the plate spring, and the plate spring is fixedly arranged on the sunken mounting part under the condition that the minimum ground clearance of the intermediate shaft tube is ensured, so that the aim of adjusting the height of a bottom plate of the whole vehicle is fulfilled, the height of the vehicle body is reduced, cargoes are convenient to load and unload, and the design requirement of the whole vehicle is met.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a rigid rear axle structure and a suspension. Background Art

[0002] Non-driven rear leaf spring suspension is a suspension system that uses leaf springs as elastic elements. It not only plays the role of a guide mechanism, but also simplifies the suspension system. It is widely used in the front and rear suspensions of trucks, providing a more stable and comfortable driving experience for the vehicle.

[0003] At present, there are two ways to arrange leaf springs: leaf springs arranged on the upper side of the rigid shaft and on the lower side of the rigid shaft. The existing arrangement scheme has many restrictions on the suspension arrangement space. Since the leaf spring has a large arc height when it is unloaded, if the leaf spring is arranged on the upper side of the shaft tube, the floor height of the vehicle in the unloaded state will be high, which will make loading and unloading of goods more difficult. If the leaf spring is arranged on the lower side of the shaft tube, the ground clearance of the vehicle will be too small, which does not meet the design requirements of the vehicle.

[0004] Therefore, a rigid rear axle structure and suspension are urgently needed to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a rigid rear axle structure. Under the condition of ensuring the minimum ground clearance of the intermediate axle tube, the leaf spring is fixedly arranged on the sunken axle head, thereby achieving the purpose of adjusting the height of the vehicle floor, reducing the vehicle body height, facilitating loading and unloading of goods, and meeting the design requirements of the vehicle.

[0006] In order to solve the above problems existing in the prior art, the present invention adopts the following technical solutions:

[0007] A rigid rear axle structure, comprising:

[0008] Intermediate shaft tube;

[0009] Two shaft heads, the two shaft heads are respectively arranged at the two ends of the intermediate shaft tube, the shaft heads are in an L-shaped structure, the shaft heads include a transmission part and a mounting part, the mounting part and the transmission part both have a first end and a second end, along the height direction of the vehicle body, the first end of the transmission part is located below the second end of the transmission part, the first end of the mounting part is connected to the first end of the transmission part, the second end of the mounting part is connected to the intermediate shaft tube, the mounting part has a bearing surface, along the height direction of the vehicle body, the bearing surface is lower than the top of the intermediate shaft tube and is used to bear the leaf spring.

[0010] Preferably, the rigid rear axle structure also includes a connecting member, which is a U-shaped structure. The connecting member includes two connecting parts and a fixing part connected between the two connecting parts. The mounting part is provided with two mounting holes. The two connecting parts are respectively slidably passed through the corresponding mounting holes. The fixing part is used to fix the leaf spring.

[0011] Preferably, the rigid rear axle structure further comprises a fastener, which is rotatably sleeved on the connecting portion, and the fastener can be pressed against the mounting portion to fix the connecting portion relative to the mounting portion.

[0012] Preferably, there are two connecting members, and along the length direction of the leaf spring, the two connecting members are arranged opposite to each other and at intervals.

[0013] Preferably, the rigid rear axle structure further includes a protrusion, and the protrusion is arranged on the bearing surface. There are multiple mounting holes, and along the peripheral direction of the protrusion, the multiple mounting holes are located on the periphery of the protrusion and distributed in a matrix.

[0014] Preferably, the rigid rear axle structure further comprises a pressure plate, wherein the pressure plate is clamped between the leaf spring and the two connecting members, and the connecting members can slide along the axial direction of the mounting hole and press the pressure plate so that the pressure plate can abut against the leaf spring.

[0015] Preferably, the pressure plate is provided with a fixing groove, the central axis of the fixing groove intersects with the central axis of the mounting hole, there are two fixing grooves, the two fixing grooves are arranged in parallel and correspond one-to-one to the two connecting members respectively.

[0016] Preferably, the intermediate shaft tube and the two shaft heads are fixedly connected by welding.

[0017] Preferably, the rigid rear axle structure further includes reinforcing ribs, and the reinforcing ribs are arranged at the angle between the mounting portion and the transmission portion.

[0018] To achieve the above object, the present invention further provides a suspension, comprising a leaf spring and the above rigid rear axle structure, wherein the leaf spring is mounted on the rigid rear axle structure.

[0019] The beneficial effects of the present invention are:

[0020] The rigid rear axle structure provided by the present invention has two shaft heads respectively arranged at the two ends of the intermediate shaft tube, the rigid rear axle structure is designed as a three-section type, the shaft head is an L-shaped structure, the shaft head includes a transmission part and a mounting part, both the mounting part and the transmission part have a first end and a second end, along the height direction of the vehicle body, the first end of the transmission part is located below the second end of the transmission part, the first end of the mounting part is connected to the first end of the transmission part, the second end of the mounting part is connected to the intermediate shaft tube, the mounting part has a bearing surface, along the height direction of the vehicle body, the bearing surface is lower than the top of the intermediate shaft tube and is used to bear the leaf spring. Compared with the traditional leaf spring arrangement, the rigid rear axle structure ensures the minimum ground clearance of the intermediate shaft tube, and the leaf spring is fixedly arranged on the sunken mounting part, thereby achieving the purpose of adjusting the height of the whole vehicle floor, reducing the height of the vehicle body, facilitating loading and unloading of goods, and meeting the design requirements of the whole vehicle.

[0021] The suspension provided by the present invention comprises a leaf spring and a rigid rear axle structure, and the leaf spring is installed on the rigid rear axle structure. The rigid rear axle structure is designed as a three-section structure, and the shaft head of the L-shaped structure is sunken and used to install and fix the leaf spring. Compared with the traditional leaf spring arrangement, the leaf spring is fixedly arranged on the sunken shaft head while ensuring the minimum ground clearance of the intermediate shaft tube, thereby achieving the purpose of adjusting the height of the vehicle floor, reducing the vehicle body height, facilitating loading and unloading of goods, and meeting the design requirements of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of a rigid rear axle structure provided by an embodiment of the present invention;

[0023] Figure 2 A front view of a rigid rear axle structure provided by an embodiment of the present invention;

[0024] Figure 3 An exploded schematic diagram of a rigid rear axle structure provided by an embodiment of the present invention;

[0025] Figure 4 A schematic structural diagram of a rigid rear axle structure and a leaf spring provided in an embodiment of the present invention.

[0026] Reference numerals:

[0027] 100. Leaf spring;

[0028] 1. Intermediate shaft tube;

[0029] 2. Shaft head; 21. Transmission part; 22. Mounting part; 221. Bearing surface;

[0030] 3. Connecting piece; 31. Connecting part; 32. Fixing part;

[0031] 4. Fasteners;

[0032] 5. Bump;

[0033] 6. Pressing plate; 61. Fixing slot;

[0034] 7. Strengthen the ribs. DETAILED DESCRIPTION

[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0036] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0038] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0039] like Figure 1-Figure 4As shown, in this embodiment, a rigid rear axle structure includes an intermediate axle tube 1 and two shaft heads 2. The two shaft heads 2 are respectively arranged at the two ends of the intermediate axle tube 1, and the shaft heads 2 are L-shaped structures. The shaft heads 2 include a transmission part 21 and a mounting part 22. The mounting part 22 and the transmission part 21 both have a first end and a second end. Along the height direction of the vehicle body, the first end of the transmission part 21 is located below the second end of the transmission part 21. The first end of the mounting part 22 is connected to the first end of the transmission part 21, and the second end of the mounting part 22 is connected to the intermediate axle tube 1. The mounting part 22 has a bearing surface 221. Along the height direction of the vehicle body, the bearing surface 221 is lower than the top of the intermediate axle tube 1 and is used to bear the leaf spring 100. Specifically, the rigid rear axle structure is designed as a three-section structure, consisting of two shaft heads 2 and the intermediate axle tube 1, and the shaft head 2 of the L-shaped structure is a sinking type. The transmission part 21 of the shaft head 2 is extended along the height direction of the vehicle body and is used to connect the transmission wheel. The mounting part 22 of the shaft head 2 is extended along the length direction of the intermediate shaft tube 1, and the two ends of the mounting part 22 are respectively connected to the transmission part 21 and the intermediate shaft tube 1. The top of the mounting part 22 has a bearing surface 221, which is a sunken structure relative to the transmission part 21 and the intermediate bearing and is used to install and fix the leaf spring 100. The traditional leaf spring 100 is arranged on the upper side or lower side of the rigid rear axle, which will cause the height of the vehicle floor to be higher or the ground clearance of the vehicle to be smaller. Compared with the traditional arrangement of the leaf spring 100, the rigid rear axle structure in this embodiment ensures the minimum ground clearance of the intermediate shaft tube 1, and the leaf spring 100 is fixedly arranged on the sunken mounting part 22, thereby achieving the purpose of adjusting the height of the vehicle floor, reducing the height of the vehicle body, facilitating loading and unloading of goods, and meeting the design requirements of the vehicle.

[0040] Further, continue to refer to Figure 1-Figure 4 The rigid rear axle structure also includes a connecting member 3, which is a U-shaped structure. The connecting member 3 includes two connecting parts 31 and a fixing part 32 connected between the two connecting parts 31. The mounting part 22 is provided with two mounting holes. The two connecting parts 31 are respectively slidably penetrated into the corresponding mounting holes. The fixing part 32 is used to fix the leaf spring 100. Specifically, after the leaf spring 100 is placed on the bearing surface 221 of the mounting part 22, the two connecting parts 31 of the connecting member 3 are simultaneously inserted into the corresponding two mounting holes from above the leaf spring 100, so that the fixing part 32 of the connecting member 3 fixes the leaf spring 100 on the sunken mounting part 22. The connecting part 31 is relatively fixed with the mounting hole, and the leaf spring 100 is firmly fixed, so as to achieve the purpose of adjusting the height of the whole vehicle floor and reduce the height of the vehicle body.

[0041] Further, continue to refer to Figure 1-Figure 4The rigid rear axle structure further includes a fastener 4, which is rotatably sleeved on the connecting portion 31, and the fastener 4 can be pressed against the mounting portion 22, so that the connecting member 3 is fixed relative to the mounting portion 22. Specifically, the fastener 4 is a nut or a snap ring. In order to further ensure that the leaf spring 100 is not easy to loosen, the two connecting portions 31 of the connecting member 3 are simultaneously inserted into the corresponding two mounting holes from the top of the leaf spring 100, and the fixing portion 32 gradually moves downward and can fix the leaf spring 100 on the bearing surface 221 of the mounting portion 22, that is, when the leaf spring 100 is fixed relative to the bearing surface 221, the fastener 4 is sleeved on the connecting portion 31, and the fastener 4 is screwed so that the fastener 4 is pressed against the bottom of the fixing portion 32, so that the connecting member 3 is fixed relative to the shaft head 2, and the installation is firm, which can ensure that the connecting member 3 and the leaf spring 100 are not easy to loose relative to the mounting portion 22.

[0042] Further, continue to refer to Figure 1-Figure 4 There are two connectors 3, and along the length direction of the leaf spring 100, the two connectors 3 are arranged opposite to each other and spaced apart. Specifically, the mounting portion 22 is provided with four mounting holes. After the leaf spring 100 is placed on the bearing surface 221 of the mounting portion 22, the two connectors 3 are fixed to the mounting portion 22 through the corresponding mounting holes in turn, so that the leaf spring 100 can be positioned on the bearing surface 221 of the mounting portion 22. Finally, the corresponding connectors 3 are respectively rotated and sleeved by a plurality of fasteners 4, so that the plurality of connectors 3 are fixed relative to the shaft head 2 and firmly installed. On the contrary, the connector 3 and the leaf spring 100 can be disassembled by unscrewing the fasteners 4, which is convenient to disassemble and simple to operate.

[0043] Further, continue to refer to Figure 1-Figure 4 The rigid rear axle structure also includes a protrusion 5, which is arranged on the bearing surface 221. There are multiple mounting holes. Along the peripheral direction of the protrusion 5, multiple mounting holes are located on the periphery of the protrusion 5 and are distributed in a matrix. Specifically, the bearing surface 221 is provided with a protrusion 5, and the leaf spring 100 is fixed on the surface where the protrusion 5 is located through the connecting member 3. The protrusion 5 can enhance the structural strength of the bearing surface 221, and prevent the weight of the leaf spring 100 itself and the long-term fixation on the shaft head 2 from damaging the structure of the mounting portion 22. Multiple mounting holes are arranged at intervals along the periphery of the protrusion 5, which does not affect the connection between the connecting member 3 and the mounting holes. At the same time, the outer edge of the protrusion 5 can play a certain guiding role for the connecting member 3, that is, before the two connecting parts 31 of the connecting member 3 are simultaneously inserted into the corresponding two mounting holes from the top of the leaf spring 100, under the guiding role of the outer edge of the protrusion 5, the two connecting parts 31 are smoothly inserted into the corresponding mounting holes at the same time, which is convenient for the operator to quickly install and improve work efficiency.

[0044] Further, continue to refer to Figure 1-Figure 4The rigid rear axle structure further includes a pressure plate 6, which is sandwiched between the leaf spring 100 and the two connectors 3. The connectors 3 can slide along the axial direction of the mounting hole and press the pressure plate 6, so that the pressure plate 6 can abut against the leaf spring 100. Specifically, the pressure plate 6 is provided with a fixing groove 61, the central axis of the fixing groove 61 intersects with the central axis of the mounting hole, and there are two fixing grooves 61, which are arranged in parallel and correspond to the two connectors 3 one by one. After the leaf spring 100 is placed on the bearing surface 221 of the mounting portion 22, the two connecting portions 31 of the connector 3 are simultaneously inserted into the corresponding two mounting holes from above the leaf spring 100, so that the fixing portion 32 of the connector 3 fixes the leaf spring 100 on the sunken mounting portion 22. At this time, the fixing portion 32 is pressed in the fixing groove 61 of the pressure plate 6, and the pressure plate 6 is pressed against the leaf spring 100. The fixing groove 61 plays a role in positioning the connector 3, preventing the connector 3 from shaking back and forth, thereby affecting the fixing effect of the connector 3. At the same time, the pressure plate 6 protects the leaf spring 100, preventing the connector 3 from directly causing wear on the leaf spring 100. Finally, the connector 3 fixes the leaf spring 100 on the mounting portion 22 of the shaft head 2 through the pressure plate 6, thereby achieving the purpose of adjusting the height of the vehicle floor and reducing the vehicle body height.

[0045] Further, continue to refer to Figure 1-Figure 4 , the intermediate shaft tube 1 and the two shaft heads 2 are fixedly connected by welding. Specifically, the shaft head 2 is made of forged steel or cast steel structure, and the rigid rear axle structure is designed as a three-section structure, consisting of two shaft heads 2 and the intermediate shaft tube 1. The two shaft heads 2 are fixedly connected to the two ends of the intermediate shaft tube 1 by welding, and the connection is firm and the structural strength is high. Optionally, the two shaft heads 2 and the intermediate shaft tube 1 are integrally formed by casting or other methods to improve the quality of the rigid rear axle structure, save production costs, and shorten the production cycle.

[0046] Further, continue to refer to Figure 1-Figure 4 The rigid rear axle structure further includes a reinforcing rib 7, which is disposed at the angle between the mounting portion 22 and the transmission portion 21. Specifically, the reinforcing rib 7 is in a triangular structure, and the two ends of the reinforcing rib 7 are respectively fixedly connected to the mounting portion 22 and the transmission portion 21, so as to prevent the L-shaped shaft head 2 from structurally breaking at the connection between the mounting portion 22 and the transmission portion 21 under the action of the leaf spring 100's own gravity and when the transmission portion 21 is connected to the transmission wheel. The reinforcing rib 7 can improve the overall structural strength of the shaft head 2 and extend the service life of the shaft head 2.

[0047] This embodiment also provides a suspension, including a leaf spring 100 and a rigid rear axle structure, and the leaf spring 100 is installed on the rigid rear axle structure. Specifically, the rigid rear axle structure is designed as a three-section structure, and the shaft head 2 of the L-shaped structure is sunken and used to install and fix the leaf spring 100. Compared with the traditional arrangement of the leaf spring 100, while ensuring the minimum ground clearance of the intermediate shaft tube 1, the leaf spring 100 is fixedly arranged on the sunken shaft head 2, thereby achieving the purpose of adjusting the height of the vehicle floor, reducing the height of the vehicle body, facilitating loading and unloading of goods, and meeting the design requirements of the vehicle.

[0048] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A rigid rear axle structure, characterized in that: include: Intermediate shaft tube (1); Two shaft heads (2), the two shaft heads (2) are respectively arranged at the two ends of the intermediate shaft tube (1), the shaft head (2) is in an L-shaped structure, the shaft head (2) comprises a transmission part (21) and a mounting part (22), the mounting part (22) and the transmission part (21) both have a first end and a second end, along the height direction of the vehicle body, the first end of the transmission part (21) is located below the second end of the transmission part (21), the first end of the mounting part (22) is connected to the first end of the transmission part (21), the second end of the mounting part (22) is connected to the intermediate shaft tube (1), the mounting part (22) has a bearing surface (221), along the height direction of the vehicle body, the bearing surface (221) is lower than the top of the intermediate shaft tube (1) and is used to bear the leaf spring (100).

2. The rigid rear axle structure according to claim 1, characterized in that: The rigid rear axle structure also includes a connecting member (3), the connecting member (3) is a U-shaped structure, the connecting member (3) includes two connecting parts (31) and a fixing part (32) connected between the two connecting parts (31), the mounting part (22) is provided with two mounting holes, the two connecting parts (31) are respectively slidably inserted into the corresponding mounting holes, and the fixing part (32) is used to fix the leaf spring (100).

3. The rigid rear axle structure according to claim 2, characterized in that: The rigid rear axle structure also includes a fastener (4), which is rotatably sleeved on the connecting portion (31), and the fastener (4) can be pressed against the mounting portion (22) to fix the connecting portion (3) relative to the mounting portion (22).

4. The rigid rear axle structure according to claim 2, characterized in that: There are two connecting members (3), and along the length direction of the leaf spring (100), the two connecting members (3) are arranged opposite to each other and at intervals.

5. The rigid rear axle structure according to claim 2, characterized in that: The rigid rear axle structure also includes a protrusion (5), the protrusion (5) is arranged on the bearing surface (221), and there are multiple mounting holes. Along the peripheral direction of the protrusion (5), the multiple mounting holes are located on the periphery of the protrusion (5) and are distributed in a matrix.

6. The rigid rear axle structure according to claim 2, characterized in that: The rigid rear axle structure also includes a pressure plate (6), which is sandwiched between the leaf spring (100) and the two connecting members (3), and the connecting members (3) can slide along the axial direction of the mounting hole and press the pressure plate (6) so that the pressure plate (6) can abut against the leaf spring (100).

7. The rigid rear axle structure according to claim 6, characterized in that: The pressing plate (6) is provided with a fixing groove (61), the central axis of the fixing groove (61) intersects with the central axis of the mounting hole, there are two fixing grooves (61), the two fixing grooves (61) are arranged in parallel and correspond one to one with the two connecting members (3) respectively.

8. The rigid rear axle structure according to claim 1, characterized in that: The intermediate shaft tube (1) and the two shaft heads (2) are fixedly connected by welding.

9. The rigid rear axle structure according to claim 1, characterized in that: The rigid rear axle structure further comprises a reinforcing rib (7), wherein the reinforcing rib (7) is arranged at an angle between the mounting portion (22) and the transmission portion (21).

10. A suspension, characterized in that It comprises a leaf spring (100) and the rigid rear axle structure according to any one of claims 1 to 9, wherein the leaf spring (100) is mounted on the rigid rear axle structure.

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