Suspension assembly of heavy unmanned transport vehicle

Abstract

The invention discloses a suspension assembly of a heavy unmanned transport vehicle, the suspension assembly is used for connecting an axle with a frame, and the suspension assembly further comprises a suspension assembly and at least two suspension supports used for being connected with the frame; the first end of the suspension assembly is connected with the axle, and the second end and the third end of the suspension assembly are coaxially arranged and connected with the corresponding suspension supports in a relative rotation mode. The axis of the second end and the axis of the third end are parallel to the length direction of the axle. According to the invention, the suspension assembly has better shock absorption performance and damping performance and a more stable transmission structure.

Description

Technical Field

[0001] The invention relates to the field of unmanned transport vehicles, and in particular to a suspension assembly of a heavy-duty unmanned transport vehicle. Background Art

[0002] Heavy-duty unmanned transport vehicles are large in size due to their large load capacity and the integration of various functional modules in their bodies to achieve unmanned driving. Therefore, in order to meet the transportation needs of heavy-duty unmanned transport vehicles, higher requirements are placed on the suspension assembly of unmanned transport vehicles. The frame body of existing heavy-duty unmanned transport vehicles is composed of high-strength aluminum alloy profiles assembled by riveting, and the frame body is connected to the suspension assembly by welding. In addition, existing heavy-duty unmanned transport vehicles use balanced suspension or rubber suspension, so that the suspension assembly needs to be equipped with a large number of tie rods and bushing structures, resulting in more active parts of the suspension assembly, increased loss of active parts during vehicle transportation, and increased maintenance costs. In addition, in this type of suspension assembly, the tie rod bushing directly bears lateral force, which makes the wheelbase of the vehicle easy to change after high-intensity use. Therefore, it is necessary to adjust the tie rod regularly to correct the wheelbase of the vehicle. The maintenance frequency is high, which affects the normal use of the vehicle. When the wheelbase is corrected too frequently, the wear of the tire will increase, that is, the service life of the tire will be affected. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a suspension assembly for a heavy-duty unmanned transport vehicle, which prolongs the service life of the suspension assembly and reduces the number of wheelbase correction times.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: A suspension assembly of a heavy-duty unmanned transport vehicle, the suspension assembly is used to connect the axle to the frame, the suspension assembly also includes a suspension component and at least two suspension supports for connecting to the frame; the first end of the suspension component is connected to the axle, the second end and the third end of the suspension component are coaxially arranged and respectively connected to the corresponding suspension supports for relative rotation; the axis of the second end and the third end is parallel to the length direction of the axle.

[0005] Furthermore, it also includes a motor; the motor is arranged in one end of the suspension component away from the axle, and the motor is connected to the axle through a transmission shaft.

[0006] Furthermore, the suspension assembly includes a pull rod and two relatively arranged suspension bodies; one end of the two suspension bodies away from the suspension support is connected by the pull rod, and one end of the suspension body away from the axle is respectively connected to the corresponding suspension support so as to be relatively rotatable.

[0007] Furthermore, in the length direction of the suspension body, a middle portion of the suspension body has a yielding portion; in the width direction of the suspension assembly, the yielding portion is concave inwardly toward a direction approaching another suspension body.

[0008] Furthermore, the contour of the relief portion is composed of at least two arcs with different curvatures.

[0009] Furthermore, a motor bracket for connecting to a motor is arranged on the inner side of the suspension body.

[0010] Furthermore, a shock absorbing assembly is provided at the first end of the suspension assembly, and the suspension assembly is connected to the vehicle frame via the shock absorbing assembly.

[0011] Furthermore, the plane where the top of the shock absorbing assembly is located is parallel to the plane where the top of the suspension support is located.

[0012] Furthermore, the shock absorbing assembly includes an elastic member and a shock absorbing connecting plate; in the vertical direction, the elastic member is sandwiched between the shock absorbing connecting plate and the suspension assembly.

[0013] Furthermore, an embedded bearing is provided in the suspension support, and the suspension component is connected to the suspension support in a relatively rotatable manner via the embedded bearing.

[0014] The beneficial effects of the present invention are as follows: by changing the structure of the suspension assembly, one end of the suspension assembly is connected to the vehicle axle, and the other end is rotatably connected to the vehicle frame through the suspension support, so as to greatly reduce the active points of the suspension assembly, thereby reducing the wear of the active parts, reducing the maintenance frequency and difficulty of the suspension assembly, and extending the service life of the suspension assembly. In addition, due to the setting of the suspension support, the lateral stress of the vehicle axle is dispersed to the suspension support, extending the service life of the tire, reducing the use of active parts and eliminating the use of wear parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A top view of a suspension assembly of a heavy-duty unmanned transport vehicle in the present invention; Figure 2 for Figure 1 Side view of Figure 3 A partial cross-sectional view of a suspension assembly of a heavy-duty unmanned transport vehicle in the present invention; Figure 4 for Figure 2 Sectional view of the AA plane; Figure 5 It is a structural schematic diagram of a suspension assembly of a heavy-duty unmanned transport vehicle in the present invention; Figure 6 The exploded view is of a suspension assembly of a heavy-duty unmanned transport vehicle in the present invention.

[0016] Description of labels: 1. Suspension assembly; 11. Suspension component; 111. First end; 112. Second end; 113. Third end; 114. Tie rod; 115. Suspension body; 1151. Displacement portion; 1152. Upper plate; 1153. Lower plate; 116. Motor bracket; 12. Suspension support; 121. Support connecting plate; 122. Rotating member; 13. Motor; 131. Transmission shaft; 14. Shock absorber assembly; 141. Elastic member; 142. Shock absorber connecting plate; 15. Embedded bearing; 2. Axle. DETAILED DESCRIPTION

[0017] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in combination with the implementation modes and the accompanying drawings.

[0018] Please refer to Figure 1-Figure 6 A suspension assembly of a heavy-duty unmanned transport vehicle, wherein the suspension assembly 1 is used to connect the axle 2 to the frame, and the suspension assembly 1 also includes a suspension component 11 and at least two suspension supports 12 for connecting to the frame; the first end 111 of the suspension component 11 is connected to the axle 2, the second end 112 and the third end 113 of the suspension component 11 are coaxially arranged and are respectively connected to the corresponding suspension supports 12 so as to be relatively rotatable; the axes of the second end 112 and the third end 113 are parallel to the length direction of the axle 2, that is, the two suspension supports 12 are also coaxially arranged.

[0019] It is understandable that, in the present invention, by changing the structure of the suspension component 11, one end of the suspension component 11 is connected to the axle 2, and the other end is rotatably connected to the frame through the suspension support 12, so that the suspension component 11 can swing up and down relative to the frame, greatly reducing the active points of the suspension assembly 1, thereby reducing the wear of the active parts, reducing the maintenance frequency and difficulty of the suspension assembly 1, and extending the service life of the suspension assembly 1. In addition, due to the setting of the suspension support 12, the lateral stress of the axle 2 is dispersed to the suspension support 12, thereby extending the service life of the tire.

[0020] In some embodiments, a motor 13 is further included; the motor 13 is disposed in one end of the suspension assembly 11 away from the axle 2, and the motor 13 is connected to the axle 2 through a transmission shaft 131. The motor 13 is directly integrated with the suspension assembly 11, so that the motor 13 moves synchronously with the axle 2 and the suspension assembly 11, which greatly shortens the length of the transmission shaft 131, reduces weight, and ensures transmission efficiency and stability between the motor 13 and the axle 2.

[0021] In some embodiments, the suspension assembly 11 includes a tie rod 114 and two oppositely arranged suspension bodies 115; the ends of the two suspension bodies 115 away from the suspension support 12 are connected by the tie rod 114, and the ends of the suspension bodies 115 away from the axle 2 are respectively connected to the corresponding suspension support 12 so as to be relatively rotatable. Since the suspension mounting plates on both sides of the suspension structure used in the existing unmanned transport vehicle are connected by a tie rod 114, and a bushing is provided at the connection between the tie rod 114 and the suspension mounting plate, the lateral forces generated during the driving process are directly borne by the tie rod bushing, so that the stress is concentrated on the tie rod bushing, which causes the wheelbase of the unmanned transport vehicle to change during long-term and high-intensity use. In the present invention, a tie rod 114 is provided at one end of the two suspension bodies 115, and the other end of the suspension body 115 is rotatably connected to the corresponding suspension support 12 to form an A-shaped suspension structure, so that the lateral stress generated by the axle 2 is dispersed through the tie rod 114 and the two suspension supports 12 respectively, avoiding stress concentration on the tie rod bushing, thereby avoiding changes in the wheelbase, reducing deviation correction and reducing additional tire wear caused by temporary displacement of the axle 2, and extending the service life of the tire. Specifically, the first end 111 of the suspension assembly 11 is one end where the two suspension bodies 115 are connected to the axle 2 , and the second end 112 and the third end 113 of the suspension assembly 11 are one end where the two suspension bodies 115 are connected to the corresponding suspension supports 12 .

[0022] In some embodiments, in the length direction of the suspension body 115, the middle part of the suspension body 115 has a yielding portion 1151; in the width direction of the suspension assembly 11, the yielding portion 1151 is concave toward the direction close to another suspension body 115. The design of the yielding portion 1151 is used to avoid the tire of the transport vehicle and prevent the suspension body 115 from interfering with the swing of the tire. In addition, the provision of the yielding portion 1151 improves the lateral rigidity of the suspension assembly 11 and improves the lateral load-bearing capacity of the suspension assembly 1.

[0023] In some embodiments, the contour of the yielding portion 1151 is composed of at least two arcs with different curvatures, wherein the suspension body 115 includes an upper plate 1152 and a lower plate 1153 arranged in sequence in the vertical direction, and both the upper plate 1152 and the lower plate 1153 are provided with a yielding portion. Specifically, the curvature range of the yielding portion of the upper plate 11552 is 1.49e-3~2.29e-3 mm -1 ;The curvature range of the yielding portion of the lower plate 1153 is 2.15e-3~6.67e-4 mm -1 ; As a result, when the yielding portion 1151 is subjected to lateral stress, the lateral stress is dispersed in different directions, thereby avoiding the stress concentration in a certain area, improving the lateral load-bearing capacity of the suspension assembly 1, and further reducing the frequency of wheelbase correction.

[0024] In some embodiments, a motor bracket 116 for connecting to the motor 13 is disposed on the inner side of the suspension body 115. Since the motor 13 is mainly used to provide driving force for the axle 2, and the design of the motor 13 needs to be adjustable in two directions of three axes in space to ensure that the transmission shaft 131 of the motor 13 is aligned with the axle 2, the motor 13 is disposed between the two suspension bodies 115, which can ensure that the motor 13 swings with the axle 2 and the suspension body 115, and can ensure that the motor 13 is aligned with the axle 2, so as to ensure that the axle 2 obtains a higher transmission efficiency. Specifically, a motor bracket 116 is disposed on each of the two suspension bodies 115, and the two electrode brackets are symmetrically disposed, that is, there is a motor bracket 116 between the second end 112 and the first end 111 of the suspension assembly 11 and between the third end 113 and the first end 111 of the suspension assembly 11.

[0025] In some embodiments, the first end 111 of the suspension assembly 11 is provided with a shock absorbing assembly 14, and the suspension assembly 11 is connected to the frame through the shock absorbing assembly 14. The shock absorbing structure used in the existing unmanned transport vehicle is a leaf spring, and in order to achieve an ideal shock absorbing effect, a group of leaf springs is arranged between each two suspensions, which makes a large number of leaf springs arranged on the frame, so that the self-weight of the unmanned transport vehicle is increased, and the leaf spring has a strong shock absorption ability but a poor damping ability when the vehicle is unloaded. When there are ups and downs on the road surface, the vehicle itself is prone to bounce, resulting in a loss of driving force or braking force, increasing the risk of driving trajectory deviation and loss of control. Therefore, a shock absorbing assembly 14 is sandwiched between the first end 111 of the suspension assembly 11 and the frame, so that the elastic deformation of the unmanned transport vehicle after being overloaded is reduced, and compared with the vehicle under unloaded or overloaded conditions, it has a better shock absorption and damping effect, which can effectively reduce the loss of the vehicle's grip or braking force, and reduce the risk of driving trajectory deviation and loss of control. Specifically, in some embodiments, the shock absorbing assembly 14 includes an elastic member 141 and a shock absorbing connecting plate 142; in the vertical direction, the elastic member 141 is sandwiched between the shock absorbing connecting plate 142 and the suspension assembly 11. Preferably, the elastic member 141 is made of rubber.

[0026] In some embodiments, the plane where the top of the shock absorbing assembly 14 is located is parallel to the plane where the top of the suspension support 12 is located, so as to improve the structural stability of the suspension assembly 11 .

[0027] In some embodiments, an embedded bearing 15 is provided in the suspension support 12, and the suspension component 11 is relatively rotatably connected to the suspension support 12 via the embedded bearing 15. The design of the embedded bearing 15 allows the connection position between the suspension body 115 and the frame to withstand the same thrust and tension, thereby improving the overall performance of the suspension component 11.

[0028] In some embodiments, the suspension support 12 includes a support connecting plate 121 and a rotating member 122 connected in sequence; the rotating member 122 is rotatably connected to the suspension assembly 11, and the support connecting plate 121 is connected to the vehicle frame. The support connecting plate 121 is provided to ensure the connection stability between the rotating member 122 and the vehicle frame, and the rotating member 122 is used to disperse stress and improve the structural stability between the axle 2 and the vehicle frame.

[0029] Embodiment 1 of the present invention is: A suspension assembly 1 of a heavy-duty unmanned transport vehicle is provided. The suspension assembly 1 is used to connect an axle 2 to a vehicle frame. The suspension assembly 1 also includes a suspension component 11 and two suspension supports 12 for connecting to the vehicle frame. A first end 111 of the suspension component 11 is connected to the axle 2, and a second end 112 and a third end 113 of the suspension component 11 are coaxially arranged and are respectively connected to corresponding suspension supports 12 so as to be relatively rotatable. The axes of the second end 112 and the third end 113 are parallel to the length direction of the axle 2.

[0030] In this embodiment, a motor 13 is further included; the motor 13 is disposed in one end of the suspension assembly 11 away from the axle 2 , and the motor 13 is connected to the axle 2 via a transmission shaft 131 .

[0031] In this embodiment, the suspension assembly 11 includes a tie rod 114 and two suspension bodies 115 arranged opposite to each other; the ends of the two suspension bodies 115 away from the suspension support 12 are connected by the tie rod 114, and the ends of the suspension bodies 115 away from the support are also connected to the axle 2, and the ends of the suspension bodies 115 away from the axle 2 are respectively connected to the corresponding suspension supports 12 so as to be relatively rotatable. Specifically, the first end 111 of the suspension assembly 11 is the end where the two suspension bodies 115 are connected to the axle 2, and the second end 112 and the third end 113 of the suspension assembly 11 are the ends where the two suspension bodies 115 are connected to the corresponding suspension supports 12. Preferably, the tie rod 114 is an adjustable tie rod 114.

[0032] In this embodiment, in the length direction of the suspension body 115, the middle part of each suspension body 115 has a clearance portion 1151; in the width direction of the suspension assembly 11, the clearance portion 1151 is concave toward the direction close to another suspension body 115. Further, the contour of the clearance portion 1151 is composed of at least two arcs with different curvatures.

[0033] In this embodiment, a motor bracket 116 for connecting to the motor 13 is provided on the inner side of the suspension body 115. Specifically, a motor bracket 116 is provided on each of the two suspension bodies 115, and the two electrode brackets are symmetrically arranged, that is, a motor bracket 116 is provided between the second end 112 and the first end 111 of the suspension component 11 and between the third end 113 and the first end 111 of the suspension component 11.

[0034] In this embodiment, the first end 111 of the suspension assembly 11 is provided with a shock absorbing assembly 14, and the suspension assembly 11 is connected to the vehicle frame through the shock absorbing assembly 14. Specifically, the shock absorbing assembly 14 includes an elastic member 141 and a shock absorbing connecting plate 142; in the vertical direction, the elastic member 141 is sandwiched between the shock absorbing connecting plate 142 and the suspension assembly 11. Preferably, the elastic member 141 is made of rubber.

[0035] In this embodiment, the plane where the top of the shock absorbing assembly 14 is located is parallel to the plane where the top of the suspension support 12 is located.

[0036] In this embodiment, the suspension support 12 includes a support connecting plate 121 and a rotating member 122 which are connected in sequence; the rotating member 122 is rotatably connected to the suspension assembly 11, and the support connecting plate 121 is connected to the bottom of the vehicle frame.

[0037] In summary, the suspension assembly of a heavy-duty unmanned transport vehicle provided by the present invention adopts an A-shaped suspension component so that the lateral stress of the vehicle is dispersed to two suspension supports and a pull rod, avoiding stress concentration, and reducing the eighteen active points on the existing two-bridge frame to eight active points, greatly reducing the setting of active parts, and reducing maintenance costs and difficulties. The motor is integrated between the two suspension bodies so that the motor swings with the axle and the suspension body, thereby improving the transmission efficiency. The present invention adopts a new suspension structure so that the axle, motor and suspension move synchronously, and significantly reduces the number of active parts, reduces the wear of active parts, and enables the suspension assembly to have better shock absorption performance, damping performance and a more stable transmission structure.

[0038] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A suspension assembly of a heavy-duty unmanned transport vehicle, the suspension assembly being used to connect the axle to the frame, characterized in that: The suspension assembly also includes a suspension component and at least two suspension supports for connecting to the vehicle frame; The first end of the suspension assembly is connected to the axle, and the second end and the third end of the suspension assembly are coaxially arranged and respectively connected to the corresponding suspension supports so as to be relatively rotatable; The axes of the second end and the third end are parallel to the length direction of the axle.

2. The suspension assembly of the heavy-duty unmanned transport vehicle according to claim 1, characterized in that: Also includes motors; The motor is arranged in one end of the suspension assembly away from the axle, and the motor is connected to the axle through a transmission shaft.

3. The suspension assembly of the heavy-duty unmanned transport vehicle according to claim 1, characterized in that: The suspension assembly includes a pull rod and two suspension bodies arranged opposite to each other; One end of the two suspension bodies away from the suspension support is connected through the pull rod, and one end of the suspension body away from the axle is respectively connected to the corresponding suspension support so as to be relatively rotatable.

4. The suspension assembly of the heavy-duty unmanned transport vehicle according to claim 3, characterized in that: In the length direction of the suspension body, the middle part of the suspension body has a yielding portion; In the width direction of the suspension assembly, the relief portion is concave toward a direction approaching the other suspension body.

5. The suspension assembly of the heavy-duty unmanned transport vehicle according to claim 4, characterized in that: The contour of the relief portion is composed of at least two arcs with different curvatures.

6. The suspension assembly of the heavy-duty unmanned transport vehicle according to claim 3, characterized in that: A motor bracket for connecting with a motor is arranged inside the suspension body.

7. The suspension assembly of the heavy-duty unmanned transport vehicle according to claim 1, characterized in that: A shock absorbing assembly is disposed at the first end of the suspension assembly, and the suspension assembly is connected to the vehicle frame via the shock absorbing assembly.

8. The suspension assembly of the heavy-duty unmanned transport vehicle according to claim 7, characterized in that: The plane where the top of the shock absorbing assembly is located is parallel to the plane where the top of the suspension support is located.

9. The suspension assembly of the heavy-duty unmanned transport vehicle according to claim 7, characterized in that: The shock absorbing assembly comprises an elastic member and a shock absorbing connecting plate; In the vertical direction, the elastic member is sandwiched between the shock-absorbing connecting plate and the suspension assembly.

10. The suspension assembly of the heavy-duty unmanned transport vehicle according to claim 1, characterized in that: An embedded bearing is arranged in the suspension support, and the suspension component is connected to the suspension support via the embedded bearing so as to be relatively rotatable.

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