Rigid rear axle structure and suspension

Abstract

The utility model belongs to the technical field of vehicles, and discloses a rigid rear axle structure and a suspension, the rigid rear axle structure comprises a middle axle tube and two axle heads, the rigid rear axle structure is designed into a three-section type, the two axle heads are respectively arranged at two ends of the middle axle tube, 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 utility model relates to the technical field of vehicles, in particular to a rigid rear axle structure and a suspension. Background Art

[0002] The non-driven rear leaf spring type suspension is a suspension system that uses leaf springs as elastic elements. It can not only act as a guiding mechanism but also simplify the suspension system. It is widely used in the front and rear suspensions of trucks to provide a more stable and comfortable driving experience for the vehicle.

[0003] At present, there are two arrangements for leaf springs: the leaf spring is arranged above the rigid axle and below the rigid axle. The existing arrangement schemes have more restrictions on the suspension arrangement space. Since the leaf spring has a large arc height in the unloaded state, if the leaf spring is arranged above the axle tube, the floor height of the whole vehicle in the unloaded state is relatively high, which is troublesome for loading and unloading goods. If the leaf spring is arranged below the axle tube, the ground clearance of the whole vehicle will be relatively small, which does not meet the design requirements of the whole vehicle.

[0004] Therefore, there is an urgent need for a rigid rear axle structure and a suspension to solve the above problems. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a rigid rear axle structure. On the premise of ensuring the minimum ground clearance of the middle axle tube, the leaf spring is fixedly arranged on the sunken axle head, so as to achieve the purpose of adjusting the floor height of the whole vehicle, reducing the vehicle body height, facilitating the loading and unloading of goods, and meeting the design requirements of the whole vehicle.

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

[0007] A rigid rear axle structure includes:

[0008] A middle axle tube;

[0009] Two axle heads, which are respectively arranged at both ends of the middle axle tube. The axle heads are in an L-shaped structure. The axle head includes a transmission part and an installation part. Both the installation 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 installation part is connected to the first end of the transmission part. The second end of the installation part is connected to the middle axle tube. The installation part has a bearing surface, and along the height direction of the vehicle body, the bearing surface is lower than the top of the middle axle tube and is used for bearing the leaf spring.

[0010] Preferably, the rigid rear axle structure further includes a connecting member, the connecting member has a U-shaped structure, the connecting member includes two connecting portions and a fixing portion connected between the two connecting portions, the mounting portion is provided with two mounting holes, and the two connecting portions respectively slide through the corresponding mounting holes, and the fixing portion is used for fixing the leaf spring.

[0011] Preferably, the rigid rear axle structure further includes a fastener, the fastener is rotatably sleeved on the connecting portion, and the fastener can abut against the mounting portion so that the connecting member is fixed 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 opposite and spaced apart.

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

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

[0015] Preferably, the pressing plate is provided with fixing grooves, the central axes of the fixing grooves intersect with the central axis of the mounting hole, there are two fixing grooves, and the two fixing grooves are arranged in parallel and respectively correspond to the two connecting members one by one.

[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 a reinforcing rib, and the reinforcing rib is provided at the included angle between the mounting portion and the transmission portion.

[0018] To achieve the above object, the present invention further provides a suspension, including a leaf spring and the above-mentioned rigid rear axle structure, and 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 utility model has two axle heads respectively arranged at both ends of the middle axle tube. The rigid rear axle structure is designed as a three-section type, and the axle head is in an L-shaped structure. The axle 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, and the second end of the mounting part is connected to the middle axle tube. The mounting part has a bearing surface, and along the height direction of the vehicle body, the bearing surface is lower than the top of the middle axle tube and is used to bear the leaf spring. Compared with the traditional leaf spring arrangement, this rigid rear axle structure, while ensuring the minimum ground clearance of the middle axle tube, has the leaf spring fixedly arranged on the sunken mounting part, thereby achieving the purpose of adjusting the height of the vehicle floor, reducing the vehicle body height, facilitating the loading and unloading of goods, and meeting the requirements of the overall vehicle design.

[0021] The suspension provided by the present utility model includes a leaf spring and a rigid rear axle structure, and the leaf spring is mounted on the rigid rear axle structure. The rigid rear axle structure is designed as a three-section structure, and the L-shaped axle head is sunken and used for mounting and fixing the leaf spring. Compared with the traditional leaf spring arrangement, while ensuring the minimum ground clearance of the middle 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 the loading and unloading of goods, and meeting the requirements of the overall vehicle design. Brief Description of the Drawings

[0022] Figure 1 It is a schematic diagram of the rigid rear axle structure provided by an embodiment of the present utility model;

[0023] Figure 2 It is a front view of the rigid rear axle structure provided by an embodiment of the present utility model;

[0024] Figure 3 It is an exploded schematic diagram of the rigid rear axle structure provided by an embodiment of the present utility model;

[0025] Figure 4 It is a schematic diagram of the structure of the rigid rear axle structure and the leaf spring provided by an embodiment of the present utility model.

[0026] Reference Signs:

[0027] 100, leaf spring;

[0028] 1, middle axle tube;

[0029] 2, axle head; 21, transmission part; 22, mounting part; 221, bearing surface;

[0030] 3, connecting piece; 31, connecting part; 32, fixing part;

[0031] 4, fastener;

[0032] 5, protrusion;

[0033] 6. Pressure plate; 61. Fixed groove;

[0034] 7. Reinforcing rib. Specific embodiments

[0035] The present utility model will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that for the sake of description, only the parts related to the present utility model are shown in the drawings, rather than all the structures.

[0036] In the description of the present utility model, unless otherwise clearly defined 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 integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0037] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "above", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0038] In the description of this embodiment, the orientation or positional relationship such as "above", "below", "left", and "right" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and do not have special meanings.

[0039] Such as Figures 1 - 4As shown, in this embodiment, a rigid rear axle structure includes an intermediate axle tube 1 and two axle heads 2. Among them, the two axle heads 2 are respectively arranged at both ends of the intermediate axle tube 1. The axle head 2 has an L-shaped structure and includes a transmission part 21 and a mounting part 22. Both the mounting part 22 and the transmission part 21 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, composed of two axle heads 2 and an intermediate axle tube 1. The L-shaped axle head 2 is of a sunken type. Among them, the transmission part 21 of the axle head 2 extends along the height direction of the vehicle body and is used to connect the transmission wheel. The mounting part 22 of the axle head 2 extends along the length direction of the intermediate axle tube 1, and both ends of the mounting part 22 are respectively connected to the transmission part 21 and the intermediate axle tube 1. The top of the mounting part 22 has a bearing surface 221. This bearing surface 221 is of a sunken structure relative to the transmission part 21 and the intermediate bearing and is used to mount and fix the leaf spring 100. While the traditional leaf spring 100 is arranged on the upper side or the lower side of the rigid rear axle, it will cause the height of the vehicle floor to be relatively high or the ground clearance of the whole vehicle to be relatively small. Compared with the traditional arrangement of the leaf spring 100, in the rigid rear axle structure of this embodiment, while ensuring the minimum ground clearance of the intermediate axle tube 1, the leaf spring 100 is fixedly arranged on the sunken mounting part 22, so as to achieve the purpose of adjusting the height of the vehicle floor, reduce the vehicle body height, facilitate loading and unloading of goods, and meet the design requirements of the whole vehicle.

[0040] Further, continue to refer to Figures 1 - 4 , the rigid rear axle structure further includes a connecting piece 3. The connecting piece 3 has a U-shaped structure and 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, and the two connecting parts 31 respectively slide through 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 piece 3 are respectively inserted into the corresponding two mounting holes from above the leaf spring 100 at the same time, so that the fixing part 32 of the connecting piece 3 fixes the leaf spring 100 on the sunken mounting part 22. The connecting part 31 is clamped and relatively fixed with the mounting hole, and the leaf spring 100 is fixed firmly, achieving the purpose of adjusting the height of the vehicle floor and reducing the vehicle body height.

[0041] Further, continue to refer to Figures 1 - 4, the rigid rear axle structure further includes a fastener 4. The fastener 4 is rotatably sleeved on the connecting portion 31, and the fastener 4 can be abutted 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. To further ensure that the leaf spring 100 is not easily loosened, the two connecting portions 31 of the connecting member 3 are respectively inserted into the corresponding two mounting holes from above the leaf spring 100 at the same time. 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 to make the fastener 4 abut against the bottom of the fixing portion 32, so that the connecting member 3 is fixed relative to the axle head 2, the installation is firm, and it can ensure that both the connecting member 3 and the leaf spring 100 are not easily loosened relative to the mounting portion 22.

[0042] Further, continue to refer to Figures 1 - 4 , there are two connecting members 3. Along the length direction of the leaf spring 100, the two connecting members 3 are opposite to each other and arranged at intervals. 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 connecting members 3 are sequentially fixed to the mounting portion 22 through the corresponding mounting holes, and the leaf spring 100 can be positioned on the bearing surface 221 of the mounting portion 22. Finally, a plurality of fasteners 4 are respectively rotatably sleeved on the corresponding connecting members 3, so that the plurality of connecting members 3 are fixed relative to the axle head 2, and the installation is firm. On the contrary, unscrewing the fasteners 4 can disassemble the connecting members 3 and the leaf spring 100, and the disassembly is convenient and the operation is simple.

[0043] Further, continue to refer to Figures 1 - 4 , the rigid rear axle structure further includes a protrusion 5. The protrusion 5 is provided on the bearing surface 221. The number of mounting holes is multiple. Along the outer circumferential direction of the protrusion 5, the multiple mounting holes are located on the outer circumference of the protrusion 5 and are arranged in a matrix. Specifically, the bearing surface 221 protrudes with the protrusion 5. 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 self-weight of the leaf spring 100 and the long-term fixation to the axle head 2 from damaging the structure of the mounting portion 22. The multiple mounting holes are arranged at intervals along the outer circumference 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 portions 31 of the connecting member 3 are respectively inserted into the corresponding two mounting holes from above the leaf spring 100 at the same time, under the guiding action of the outer edge of the protrusion 5, the two connecting portions 31 are smoothly inserted into the corresponding mounting holes at the same time, which is convenient for the operator to install quickly and improves work efficiency.

[0044] Further, continue to refer to Figures 1 - 4, the rigid rear axle structure further includes a pressing plate 6. The pressing plate 6 is clamped between the leaf spring 100 and the two connecting members 3. The connecting member 3 can slide along the axial direction of the mounting hole and press the pressing plate 6, so that the pressing plate 6 can abut against the leaf spring 100. Specifically, the pressing plate 6 is provided with fixing grooves 61. The central axis of the fixing groove 61 intersects with the central axis of the mounting hole. The number of the fixing grooves 61 is two. The two fixing grooves 61 are arranged in parallel and correspond to the two connecting members 3 respectively. After the leaf spring 100 is placed on the bearing surface 221 of the mounting portion 22, the two connecting portions 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 portion 32 of the connecting member 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 pressing plate 6, the pressing plate 6 presses against the leaf spring 100, and the fixing groove 61 plays a role in positioning the connecting member 3 to prevent the connecting member 3 from shaking back and forth, thereby affecting the fixing effect of the connecting member 3. At the same time, the pressing plate 6 plays a role in protecting the leaf spring 100 to prevent the connecting member 3 from directly causing wear to the leaf spring 100. Finally, the connecting member 3 fixes and installs the leaf spring 100 on the mounting portion 22 of the axle head 2 through the pressing plate 6, achieving the purpose of adjusting the height of the vehicle floor and reducing the vehicle body height.

[0045] Furthermore, continue to refer to Figures 1 - 4 , the intermediate shaft tube 1 and the two axle heads 2 are fixedly connected by welding. Specifically, the axle head 2 is made of forged steel or cast steel structure. The rigid rear axle structure is designed as a three-section structure, consisting of two axle heads 2 and an intermediate shaft tube 1. The two axle heads 2 are both fixedly connected to both ends of the intermediate shaft tube 1 by welding, with firm connection and high structural strength. Optionally, the two axle heads 2 and the intermediate shaft tube 1 are integrally formed by casting or other means, improving the quality of the rigid rear axle structure, saving production costs, and shortening the production cycle.

[0046] Furthermore, continue to refer to Figures 1 - 4 , the rigid rear axle structure further includes a reinforcing rib 7. The reinforcing rib 7 is arranged at the included angle between the mounting portion 22 and the transmission portion 21. Specifically, the reinforcing rib 7 is in a triangular structure. The two ends of the reinforcing rib 7 are respectively fixedly connected to the mounting portion 22 and the transmission portion 21, avoiding the situation that the connection between the mounting portion 22 and the transmission portion 21 breaks under the action of the self-weight of the leaf spring 100 and the external transmission wheel of the transmission portion 21 when the L-shaped axle head 2 is in place. The reinforcing rib 7 can improve the overall structural strength of the axle head 2 and extend the service life of the axle 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 axle head 2 of the L-shaped structure is sunken and used to install and fix the leaf spring 100. Compared with the traditional layout of the leaf spring 100, with the minimum ground clearance of the middle axle tube 1 guaranteed, the leaf spring 100 is fixedly arranged on the sunken axle head 2, so as to achieve the purpose of adjusting the height of the vehicle floor, reducing the body height, facilitating the loading and unloading of goods, and meeting the design requirements of the whole vehicle.

[0048] Obviously, the above embodiments of the present invention are only examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A rigid rear axle structure, characterized in that, Comprising: An intermediate shaft tube (1); Two shaft heads (2), the two shaft heads (2) are respectively arranged at both ends of the intermediate shaft tube (1), the shaft head (2) has an L-shaped structure, the shaft head (2) includes a transmission part (21) and a mounting part (22), both the mounting part (22) and the transmission part (21) 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 for bearing the leaf spring (100).

2. The rigid rear axle structure according to claim 1, wherein The rigid rear axle structure further includes a connecting piece (3), the connecting piece (3) has a U-shaped structure, the connecting piece (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, and the two connecting parts (31) respectively slide through the corresponding mounting holes, and the fixing part (32) is used for fixing the leaf spring (100).

3. The rigid rear axle structure according to claim 2, characterized in that, The rigid rear axle structure further includes a fastener (4), the fastener (4) is rotatably sleeved on the connecting part (31), and the fastener (4) can abut against the mounting part (22) so that the connecting piece (3) is fixed relative to the mounting part (22) and does not move.

4. The rigid rear axle structure according to claim 2, wherein The number of the connecting pieces (3) is two, and along the length direction of the leaf spring (100), the two connecting pieces (3) are opposite and spaced apart.

5. The rigid rear axle structure according to claim 2, characterized in that The rigid rear axle structure further includes a protrusion (5), the protrusion (5) is arranged on the bearing surface (221), the number of the mounting holes is multiple, and along the circumferential direction of the protrusion (5), the multiple mounting holes are located on the outer circumference of the protrusion (5) and are distributed in a matrix.

6. The rigid rear axle structure according to claim 2, wherein, The rigid rear axle structure further includes a pressing plate (6), the pressing plate (6) is clamped between the leaf spring (100) and the two connecting pieces (3), and the connecting piece (3) can slide along the axial direction of the mounting hole and press the pressing plate (6) so that the pressing 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 fixing grooves (61), the central axis of the fixing grooves (61) intersects with the central axis of the mounting holes, the number of the fixing grooves (61) is two, the two fixing grooves (61) are arranged in parallel and respectively correspond to the two connecting pieces (3).

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 includes a reinforcing rib (7), and the reinforcing rib (7) is arranged at the included angle between the mounting part (22) and the transmission part (21).

10. Suspension, characterized in that, Comprising a leaf spring (100) and the rigid rear axle structure according to any one of claims 1-9, and the leaf spring (100) is mounted on the rigid rear axle structure.

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