Stabilizing structure for rear suspension of chassis and unmanned delivery vehicle
By employing a chassis rear suspension structure with stabilizer bars and booms in the unmanned logistics vehicle, the problem of vehicle swaying on bumpy roads has been solved, achieving vehicle balance and cargo stability, and preventing tipping.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI ECAR TECHNOLOGY CO LTD
- Filing Date
- 2025-07-11
- Publication Date
- 2026-06-23
AI Technical Summary
When unmanned logistics vehicles are on bumpy roads, the vehicles sway from side to side, causing the goods to scatter and even tip over. The existing chassis structure cannot effectively suppress the swaying trend.
The chassis adopts a stabilizing structure for the rear suspension, including a stabilizer bar and a hanger. The stabilizer bar is installed on the chassis through a central connecting part, and the hanger is connected to the rear axle tube. The ball joint and ball joint are ball-jointed to reduce the height difference between the left and right wheels and maintain the vehicle balance.
By designing stabilizer bars and booms, the tilt angle of unmanned logistics vehicles on bumpy roads is reduced, maintaining vehicle balance and preventing goods from scattering and vehicles from tipping over.
Smart Images
Figure CN224392299U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of unmanned logistics vehicle technology, and in particular to a stabilizing structure for the rear suspension of a chassis. Background Technology
[0002] Unmanned logistics vehicles are intelligent vehicles that use autonomous driving technology to transport and deliver goods. They combine technologies such as artificial intelligence, sensors, high-precision maps, and the Internet of Things to complete "last mile" or specific logistics tasks without human drivers.
[0003] When driving on bumpy roads, vehicles will always sway from side to side. Since most unmanned logistics vehicles operate autonomously without anyone following them, the existing chassis structure cannot suppress the swaying tendency when encountering the above situation, causing the goods they carry to become scattered during transportation, and in severe cases, the unmanned logistics vehicle may tip over.
[0004] Therefore, there is an urgent need for a stable structure for the rear suspension of a chassis and an unmanned logistics vehicle to solve the above-mentioned technical problems. Utility Model Content
[0005] The purpose of this invention is to propose a stabilizing structure for the rear suspension of a chassis and an unmanned logistics vehicle, which can reduce the height difference between the left and right wheels, thereby reducing the tilt angle of the unmanned logistics vehicle and maintaining vehicle balance.
[0006] To achieve this objective, the present invention adopts the following technical solution:
[0007] A stabilizing structure for the rear suspension of a chassis, characterized in that it comprises:
[0008] The stabilizer bar includes a left connecting part, a right connecting part, and a middle connecting part that fixes the left connecting part and the right connecting part. The middle connecting part is mounted on the chassis and can rotate relative to the chassis about the axis of the middle connecting part. The axis of the middle connecting part is parallel to the left and right directions.
[0009] There are two hangers. One hanger connects the left connecting part to the left end of the rear axle tube, and the other hanger connects the right connecting part to the right end of the rear axle tube. Each hanger includes a ball seat and two ball heads. The two ball heads are respectively installed on the rear axle tube and the stabilizer bar. Each ball seat includes two fixed ball seats, which are respectively ball-hinged with the two ball heads. In the left-right direction, the axis of the ball head does not coincide with the axis of the middle connecting part.
[0010] As a preferred technical solution for the aforementioned chassis rear suspension stabilization structure, it further includes a bushing, which is sleeved on the outside of the stabilizer bar, and the stabilizer bar is fixed to the chassis via the bushing, and the bushing is fixed to the surface of the chassis.
[0011] As a preferred technical solution for the stabilizing structure of the rear suspension of the aforementioned chassis, the bushing includes a sleeve and a fixing member. The intermediate connecting part is inserted into the sleeve, and the fixing member is used to fix it to the chassis by threaded fasteners. The sleeve is clamped between the fixing member and the chassis.
[0012] As a preferred technical solution for the stabilizing structure of the rear suspension of the aforementioned chassis, the chassis includes a longitudinal beam, the length direction of which is parallel to the front-rear direction, and a first slot is provided on the outer wall of the sleeve, the width direction of which is parallel to the left-right direction, and part of the longitudinal beam is inserted into the first slot.
[0013] The aforementioned front-back direction is perpendicular to the aforementioned left-right direction.
[0014] As a preferred technical solution for the aforementioned chassis rear suspension stabilization structure, the aforementioned sleeve also has a second slot, the width direction of the second slot is parallel to the left and right direction, and the aforementioned fastener is at least partially inserted into the second slot.
[0015] As a preferred technical solution for the aforementioned chassis rear suspension stabilization structure, the stabilizer bar and the bushing are connected by a bearing.
[0016] As a preferred technical solution for the aforementioned chassis rear suspension stabilization structure, it further includes a mounting base, which is fixed to the aforementioned rear axle tube, and the aforementioned hanger is mounted to the aforementioned rear axle tube via the mounting base.
[0017] As a preferred technical solution for the stabilizing structure of the rear suspension of the aforementioned chassis, the mounting base includes a mounting plate and a reinforcing rib. The suspension rod is mounted on the mounting plate, and the reinforcing rib connects the rear axle tube to the mounting plate. The reinforcing rib is located on one side of the mounting plate in the left-right direction.
[0018] As a preferred technical solution for the aforementioned chassis rear suspension stabilization structure, the connection position between the left connecting part and the middle connecting part is an arc transition, and the connection position between the right connecting part and the middle connecting part is an arc transition.
[0019] An unmanned logistics vehicle is also provided, including the aforementioned chassis, the aforementioned rear axle tube, and the aforementioned chassis rear suspension stabilization structure, wherein the chassis rear suspension stabilization structure connects the aforementioned chassis and the aforementioned rear axle tube.
[0020] The beneficial effects of this utility model are:
[0021] This utility model provides a stabilizing structure for a chassis rear suspension, including a stabilizer bar and a suspension rod. The stabilizer bar includes a left connecting portion, a right connecting portion, and a central connecting portion that fixes the left and right connecting portions. The central connecting portion is mounted on the chassis and can rotate relative to the chassis around its axis, which is parallel to the left-right direction. Two suspension rods are provided: one connecting the left connecting portion to the left end of the rear axle tube, and the other connecting the right connecting portion to the right end of the rear axle tube. Each suspension rod includes a ball joint and two ball joints. The two ball joints are respectively mounted on the rear axle tube and the stabilizer bar. The ball joint includes two fixed ball seats, which are spherically hinged to the two ball joints. Projected in the left-right direction, the axis of the ball joint does not coincide with the axis of the central connecting portion.
[0022] For example, the stabilizer bar is U-shaped, including a left connecting part, a middle connecting part, and a right connecting part connected in sequence. The middle connecting part is rotatably connected to the chassis for mounting the stabilizer bar to the chassis. There are two hangers, referred to as the left hanger and the right hanger. The left hanger connects the left connecting part to the left end of the rear axle tube. The left hanger includes a left ball joint and two left ball joints. One left ball joint is installed in the left connecting part, and the other left ball joint is installed in the left end of the rear axle tube. The two ball joints of the left ball joint are respectively ball-hinged with the two left ball joints. The right hanger connects the right connecting part to the right end of the rear axle tube. The right hanger includes a right ball joint and two right ball joints. One right ball joint is installed in the right connecting part, and the other right ball joint is installed in the right end of the rear axle tube. The two ball joints of the right ball joint are respectively ball-hinged with the two right ball joints. Projected in the left-right direction, neither the left nor the right ball joint coincides with the axis of the intermediate connecting part. Specifically, on the left connecting part, the connection between the left and intermediate connecting parts is spaced apart from the left ball joint installed on the left connecting part; similarly, on the right connecting part, the connection between the right and intermediate connecting parts is spaced apart from the right ball joint installed on the right connecting part. Thus, when the unmanned logistics vehicle tilts left or right, for example, if the left wheel lifts up, the left end of the rear axle tube forms a ball joint with the left ball joint, which in turn lifts the left connecting part upwards. The left connecting part drives the intermediate connecting part to rotate, which in turn drives the right connecting part to rotate synchronously. The right connecting part then drives the right end of the rear axle tube via the right-side boom, causing the right wheel to also lift up. This reduces the height difference between the left and right wheels, thereby lowering the tilt angle of the unmanned logistics vehicle and maintaining its balance. Attached Figure Description
[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.
[0024] Figure 1 This is an assembly diagram of the stabilizing structure for the rear suspension of the chassis, the rear axle tube, and the chassis provided in this embodiment of the utility model.
[0025] Figure 2 yes Figure 1 The front view;
[0026] Figure 3 yes Figure 2 A magnified view of a section at point A in the middle;
[0027] Figure 4 This is a schematic diagram of the assembly of the chassis rear suspension stabilizing structure and the rear axle tube provided in this embodiment of the utility model. Figure 1 ;
[0028] Figure 5 yes Figure 4 A magnified view of a section at point B in the middle;
[0029] Figure 6 This is a schematic diagram of the assembly of the chassis rear suspension stabilizing structure and the rear axle tube provided in this embodiment of the utility model. Figure 2 .
[0030] In the picture:
[0031] X: Left / Right direction; Y: Front / Back direction; Z: Vertical direction;
[0032] 100. Stable structure; 200. Chassis; 300. Rear axle tube;
[0033] 1. Stabilizer bar; 11. Left side connector; 12. Right side connector; 13. Middle connector;
[0034] 2. Hanging rod; 2a. Left hanging rod; 2b. Right hanging rod; 21. Ball joint; 22. Ball seat;
[0035] 3. Bushing; 31. Fitting component; 32. Fastener;
[0036] 4. Mounting bracket. Detailed Implementation
[0037] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0038] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0040] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0041] like Figures 1 to 6As shown, this utility model provides a stabilizing structure 100 for a chassis rear suspension, including a stabilizer bar 1 and a suspension rod 2. The stabilizer bar 1 includes a left connecting part 11, a right connecting part 12, and a middle connecting part 13 that fixes the left connecting part 11 and the right connecting part 12. The middle connecting part 13 is installed on the chassis 200 and can rotate relative to the chassis 200 around the axis of the middle connecting part 13. The axis of the middle connecting part 13 is parallel to the left-right direction X. There are two hangers 2. One hanger 2 connects the left connecting part 11 to the left end of the rear axle tube 300, and the other hanger 2 connects the right connecting part 12 to the right end of the rear axle tube 300. The hanger 2 includes a ball seat 22 and two ball head parts 21. The two ball head parts 21 are respectively installed on the rear axle tube 300 and the stabilizer bar 1. The ball seat 22 includes two fixed ball seats. The two ball seats are respectively ball-hinged with the two ball head parts 21. The projection of the ball head parts 21 in the left-right direction X does not coincide with the axis of the middle connecting part 13.
[0042] For example, the stabilizer bar 1 is U-shaped and includes a left connecting part 11, a middle connecting part 13 and a right connecting part 12 connected in sequence. The middle connecting part 13 is rotatably connected to the chassis 200 for mounting the stabilizer bar 1 to the chassis 200. There are two hangers 2, referred to as left hanger 2a and right hanger 2b. Left hanger 2a connects left connecting part 11 to the left end of rear axle tube 300. Left hanger 2a includes left ball seat 22 and two left ball head 21. One left ball head 21 is installed on left connecting part 11, and the other left ball head 21 is installed on the left end of rear axle tube 300. The two ball seats of left ball seat 22 are respectively ball-hinged with the two left ball head 21. Right hanger 2b connects right connecting part 12 to the right end of rear axle tube 300. Right hanger 2b includes right ball seat 22 and two right ball head 21. One right ball head 21 is installed on right connecting part 12, and the other right ball head 21 is installed on the right end of rear axle tube 300. The two ball seats of right ball seat 22 are respectively ball-hinged with the two right ball head 21. Projected in the left-right direction X, neither the left ball joint 21 nor the right ball joint 21 coincides with the axis of the middle connecting part 13. That is, on the left connecting part 11, the connection between the left connecting part 11 and the middle connecting part 13 is spaced apart from the left ball joint 21 installed on the left connecting part 11, and on the right connecting part 12, the connection between the right connecting part 12 and the middle connecting part 13 is spaced apart from the right ball joint 21 installed on the right connecting part 12. Thus, when the unmanned logistics vehicle tilts in the left-right direction X, for example, when the left wheel lifts up, the left end of the rear axle tube 300 is ball-jointed with the left ball seat 22, and the left connecting part 11 is lifted up through the left ball seat 22. The left connecting part 11 drives the middle connecting part 13 to rotate, and the middle connecting part 13 drives the right connecting part 12 to rotate synchronously. The right connecting part 12 drives the right end of the rear axle tube 300 through the right hanging rod 2b, thereby causing the right wheel to also lift up. The height difference between the left wheel and the right wheel is reduced, thereby reducing the tilt angle of the unmanned logistics vehicle and maintaining the vehicle's balance.
[0043] For example, ball head member 21 is a ball head bolt.
[0044] Optionally, the chassis rear suspension stabilization structure 100 also includes a bushing 3, which is sleeved on the outside of the stabilizer bar 1. The stabilizer bar 1 is fixed to the chassis 200 via the bushing 3, and the bushing 3 is fixed to the surface of the chassis 200. In this way, the stabilizer bar 1 is installed on the chassis 200 via the bushing 3, reducing the structural modifications to the chassis 200, reducing the opening area of the chassis 200, and maintaining the structural strength of the chassis 200.
[0045] For example, the bushing 3 is fixed to the bottom surface of the chassis 200 by threaded fasteners.
[0046] Optionally, the bushing 3 includes a sleeve 31 and a fixing member 32. The intermediate connecting part 13 is inserted into the sleeve 31. The fixing member 32 is used to fix the chassis 200 with threaded fasteners. The sleeve 31 is clamped between the fixing member 32 and the chassis 200.
[0047] Optionally, the chassis 200 includes longitudinal beams, the length direction of which is parallel to the front-rear direction Y, and the outer wall of the sleeve 31 is provided with a first slot, the width direction of which is parallel to the left-right direction X, and part of the longitudinal beam is inserted into the first slot; the front-rear direction Y is perpendicular to the left-right direction X.
[0048] For example, the depth direction of the first slot is parallel to the vertical direction Z, and the length direction is parallel to the front-to-back direction Y. The longitudinal beam can be inserted into the first slot along the vertical direction Z or the front-to-back direction Y. The opposite side walls of the first slot in the width direction can restrict the swinging of the longitudinal beam and the sleeve 31 in the left-to-right direction X.
[0049] Optionally, the sleeve 31 is also provided with a second slot, the width of which is parallel to the left-right direction X, and the fastener 32 is at least partially inserted into the second slot.
[0050] For example, the depth direction of the second slot is parallel to the vertical direction Z, and the length direction is parallel to the front-back direction Y. The fixing member 32 can be inserted into the second slot along the vertical direction Z. The opposite side walls of the second slot in the width direction can restrict the swinging of the sleeve member 31 and the fixing member 32 in the left-right direction X.
[0051] Optionally, the stabilizer bar 1 and the bushing 3 are connected by a bearing. This arrangement allows the bearing to reduce the coefficient of friction between the stabilizer bar 1 and the bushing 3, enabling the stabilizer bar 1 to move more flexibly and sensitively.
[0052] Optionally, the chassis rear suspension stabilization structure 100 also includes a mounting base 4, which is fixed to the rear axle tube 300, and the hanger 2 is mounted to the rear axle tube 300 via the mounting base 4.
[0053] Thus, by mounting the hanger 2 onto the rear axle tube 300 via the mounting base 4, the processing requirements for the rear axle tube 300 can be reduced.
[0054] For example, mounting bracket 4 is welded to rear axle tube 300.
[0055] Optionally, the mounting base 4 includes a mounting plate and a reinforcing rib. The hanger 2 is mounted on the mounting plate, and the reinforcing rib connects the rear axle tube 300 to the mounting plate. The reinforcing rib is located on the X side of the mounting plate in the left-right direction.
[0056] When the unmanned logistics vehicle is driving, the tires on the left and right sides have different undulation heights under bumpy road conditions. The rear axle tube 300 rotates around the first axis, while the stabilizer bar 1 remains horizontal in the left-right direction X. This causes the mounting base 4 to easily tilt to the left or right relative to the rear axle tube 300. Therefore, reinforcing ribs are set on the mounting plate in the left-right direction X to effectively suppress the tendency of the mounting base 4 to tilt in the left-right direction X relative to the rear axle tube 300.
[0057] It should be noted that the first axis is parallel to the front-to-back direction Y.
[0058] Optionally, the connection between the left connecting part 11 and the middle connecting part 13 is rounded, and the connection between the right connecting part 12 and the middle connecting part 13 is also rounded. This arrangement reduces stress concentration at the connection between the left connecting part 11 and the middle connecting part 13, as well as at the connection between the right connecting part 12 and the middle connecting part 13, thereby extending the service life of the stabilizer bar 1.
[0059] An unmanned logistics vehicle is also provided, including a chassis 200, a rear axle tube 300 and the aforementioned chassis rear suspension stabilization structure 100, the chassis rear suspension stabilization structure 100 connecting the chassis 200 and the rear axle tube 300.
[0060] Furthermore, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.
Claims
1. A stabilizing structure for the rear suspension of a chassis, characterized in that, include: The stabilizer bar (1) includes a left connecting part (11), a right connecting part (12), and a middle connecting part (13) that fixes the left connecting part (11) and the right connecting part (12). The middle connecting part (13) is mounted on the chassis (200) and can rotate relative to the chassis (200) about the axis of the middle connecting part (13). The axis of the middle connecting part (13) is parallel to the left-right direction (X). There are two hangers (2), one of which connects the left connecting part (11) to the left end of the rear axle tube (300), and the other hanger (2) connects the right connecting part (12) to the right end of the rear axle tube (300). The hanger (2) includes a ball seat (22) and two ball head parts (21). The two ball head parts (21) are respectively installed on the rear axle tube (300) and the stabilizer bar (1). The ball seat part (22) includes two fixed ball seats. The two ball seats are respectively ball-hinged with the two ball head parts (21). In the left-right direction (X), the axis of the ball head part (21) does not coincide with the axis of the middle connecting part (13).
2. The stabilizing structure for the rear suspension of a chassis according to claim 1, characterized in that, It also includes a bushing (3), which is sleeved on the outside of the stabilizer bar (1). The stabilizer bar (1) is fixed to the chassis (200) by the bushing (3), and the bushing (3) is fixed to the surface of the chassis (200).
3. The stabilizing structure for the rear suspension of a chassis according to claim 2, characterized in that, The bushing (3) includes a sleeve (31) and a fixing member (32). The intermediate connecting part (13) is inserted into the sleeve (31). The fixing member (32) is used to fix the chassis (200) with threaded fasteners. The sleeve (31) is sandwiched between the fixing member (32) and the chassis (200).
4. The stabilizing structure for the rear suspension of a chassis according to claim 3, characterized in that, The chassis (200) includes a longitudinal beam, the length direction of which is parallel to the front-rear direction (Y), and the outer wall of the sleeve (31) is provided with a first slot, the width direction of which is parallel to the left-right direction (X), and part of the longitudinal beam is inserted into the first slot. The front-back direction (Y) is perpendicular to the left-right direction (X).
5. The stabilizing structure for the rear suspension of a chassis according to claim 3, characterized in that, The sleeve (31) is also provided with a second slot, the width direction of the second slot is parallel to the left-right direction (X), and the fastener (32) is at least partially inserted into the second slot.
6. The stabilizing structure for the rear suspension of a chassis according to claim 2, characterized in that, The stabilizer bar (1) and the bushing (3) are connected by a bearing.
7. The stabilizing structure for the rear suspension of a chassis according to claim 1, characterized in that, It also includes a mounting base (4), which is fixed to the rear axle tube (300), and the hanger (2) is mounted to the rear axle tube (300) through the mounting base (4).
8. The stabilizing structure for the rear suspension of a chassis according to claim 7, characterized in that, The mounting base (4) includes a mounting plate and a reinforcing rib. The hanger (2) is mounted on the mounting plate. The reinforcing rib connects the rear axle tube (300) to the mounting plate, and the reinforcing rib is located on the left-right (X) side of the mounting plate.
9. The stabilizing structure for rear suspension of a chassis according to any one of claims 1-8, characterized in that, The connection between the left connecting part (11) and the middle connecting part (13) is in a rounded transition, and the connection between the right connecting part (12) and the middle connecting part (13) is in a rounded transition.
10. An unmanned logistics vehicle, characterized in that, The chassis (200), the rear axle tube (300), and the chassis rear suspension stabilization structure according to any one of claims 1-9 are included, wherein the chassis rear suspension stabilization structure connects the chassis (200) and the rear axle tube (300).