wheelchairs and their shock-absorbing chassis

Abstract

This utility model relates to the field of wheelchair technology, and provides a wheelchair and its shock-absorbing chassis. The provided shock-absorbing chassis includes a load-bearing component, a battery compartment, a first drive assembly, a first shock absorber, and a second drive assembly. The battery compartment is mounted on the load-bearing component, and the first drive assembly and the second drive assembly are rotatably connected to the load-bearing component. One end of the first shock absorber is rotatably connected to the end face of the battery compartment, and the other end is rotatably connected to the first drive assembly. The wheelchair and its shock-absorbing chassis design provided by this utility model effectively solves many problems in traditional designs by introducing shock absorbers and optimizing the layout of the walking components, improving the wheelchair's driving stability, durability, and maintenance convenience, and providing users with a more comfortable and reliable travel solution.

Description

Technical Field

[0001] This utility model relates to the field of wheelchair technology, and in particular to a wheelchair and its shock-absorbing chassis. Background Technology

[0002] In traditional wheelchair chassis designs, the walking components are often rigidly connected directly to the chassis sidewalls. This structure has significant drawbacks: Firstly, the rigid connection concentrates road loads at the connection points on the chassis sidewalls, leading to uneven load distribution over time. Especially in complex road conditions, the impact loads on the drive components are directly transmitted to the chassis body through the rigid connection, exacerbating vibrations in the seating area. Secondly, road vibration energy is transmitted directly to the seating area through the sidewalls without buffering, resulting in poor ride stability and severely impacting user comfort. Furthermore, the sidewall connection points are subjected to alternating stress over time, which can easily lead to metal fatigue and structural cracking, posing safety hazards.

[0003] Therefore, there is an urgent need for a shock-absorbing chassis for wheelchairs to solve at least one of the above problems. Utility Model Content

[0004] This invention provides a wheelchair and its shock-absorbing chassis, aiming to solve at least one of the above-mentioned problems.

[0005] In a first aspect, this utility model provides a shock-absorbing chassis, comprising:

[0006] Load-bearing components;

[0007] The battery compartment is located on the support member;

[0008] The first drive assembly is rotatably connected to the carrier;

[0009] The first shock absorber has one end rotatably connected to the end face of the battery compartment, and the other end rotatably connected to the first drive assembly.

[0010] The second drive assembly is rotatably connected to the carrier, and the second drive assembly and the first drive assembly are spaced apart along the front-rear direction of the shock-absorbing chassis.

[0011] In some embodiments, the load-bearing member includes a first support member and a second support member distributed along the front-rear direction of the shock-absorbing chassis;

[0012] The first support member has a first extension extending beyond the side of the battery compartment, and the first drive assembly is rotatably connected to the first extension;

[0013] The second support member has a second extension extending beyond the side of the battery compartment, and the second drive assembly is rotatably connected to the second extension.

[0014] In some embodiments, the first drive assembly includes a first bracket, a first wheel, and a drive member, wherein the first wheel is rotatably disposed on the first bracket, the drive member is fixed to the first bracket, and the output end of the drive member is connected to the first wheel.

[0015] The first bracket is rotatably connected to the first extension, and the other end of the first shock absorber is rotatably connected to the first bracket.

[0016] In some embodiments, the first bracket includes a first swing arm, a fixing plate, and a connecting flange;

[0017] The first swing arm is rotatably connected to the first extension, the fixing plate is fixed to the first swing arm, the first wheel is rotatably disposed on the outside of the fixing plate, the connecting flange is fixed to the inside of the fixing plate, and the other end of the first shock absorber is rotatably connected to the connecting flange.

[0018] In some embodiments, the end face of the battery compartment is provided with a first connecting seat, and one end of the first shock absorber is rotatably connected to the first connecting seat;

[0019] The connecting flange extends in a direction away from the fixed plate and has a first mounting portion. The first mounting portion at least partially overlaps with the end face of the battery compartment in the front-rear direction along the shock-absorbing chassis. The other end of the first shock absorber is rotatably connected to the first mounting portion.

[0020] In some embodiments, the device further includes a second shock absorber, one end of which is rotatably connected to the side of the battery compartment, and the other end of which is rotatably connected to the second drive assembly.

[0021] In some embodiments, the second drive assembly includes a second swing arm, a caster frame, and a second wheel, wherein the caster frame is connected to the second swing arm, and the second wheel is rotatably connected to the caster frame;

[0022] The second swing arm is rotatably connected to the second extension, and the other end of the second shock absorber is rotatably connected to the second swing arm.

[0023] In some embodiments, a second connecting seat is provided on the side of the battery compartment, and one end of the second shock absorber is rotatably connected to the second connecting seat;

[0024] The second swing arm is provided with a second mounting part, a first clearance groove and a second clearance groove. The second mounting part is located between the first clearance groove and the second clearance groove. The other end of the second shock absorber is rotatably connected to the second mounting part.

[0025] In some embodiments, the battery compartment has a cavity and an inlet, the inlet communicating with the cavity, and the end face of the battery compartment and the inlet are arranged opposite to each other along the front-rear direction of the shock-absorbing chassis;

[0026] The shock-absorbing chassis also includes a tray and a battery, the battery being supported within the tray, the tray and the battery being at least partially housed within the cavity, and the tray and the battery being detachable from the cavity via the inlet.

[0027] Secondly, the present invention provides a wheelchair, including a shock-absorbing chassis as provided in any embodiment of the present invention.

[0028] This utility model provides a wheelchair and its shock-absorbing chassis, which aims to solve the problems of uneven load distribution, poor driving stability, and easy metal fatigue and structural cracking of the side walls in the chassis structure of traditional wheelchairs.

[0029] In the shock-absorbing chassis of this invention, one end of the first shock absorber is rotatably connected to the end face of the battery compartment, and the other end of the first shock absorber is rotatably connected to the first drive assembly. This effectively reduces the impact of road vibrations on the passenger area, improving driving comfort.

[0030] By setting a support member below the battery compartment, the first drive assembly and the second drive assembly are rotatably connected to the support member, and the first drive assembly and the second drive assembly are spaced apart in the front-rear direction, so that the force is more evenly distributed on the support member, thereby improving the overall stability.

[0031] The provided shock-absorbing chassis has at least the following beneficial effects:

[0032] 1. Improved ride stability: By introducing shock-absorbing components, vibration energy that would otherwise be directly transmitted to the seating area is absorbed and dispersed, significantly reducing the vibration felt by passengers. This allows the wheelchair to maintain high ride stability in various road conditions, improving the user's riding experience.

[0033] 2. Uniform load distribution: By connecting the walking components to the load-bearing components and connecting shock-absorbing components to the sides and ends of the battery compartment, the number of connection points on the side of the battery compartment can be reduced, resulting in a uniform load distribution.

[0034] 3. Extended Service Life: Traditional rigid connection methods are prone to metal fatigue and structural cracking. The new damping design effectively alleviates this problem by reducing the alternating stress on the side connection points. Therefore, this design can significantly extend the service life of the damping chassis and reduce maintenance costs caused by structural damage.

[0035] 4. Enhanced Safety and Reliability: By optimizing the force transmission path and adding vibration damping measures, the overall safety of the chassis structure has been improved. In complex road conditions, this design better protects passenger safety and reduces the risk of accidents caused by vibrations.

[0036] In summary, the wheelchair and its shock-absorbing chassis design provided by this utility model effectively solves many problems in traditional designs by introducing shock-absorbing components and optimizing the layout of the walking components, thereby improving the stability and durability of the wheelchair and providing users with a more comfortable and reliable travel solution.

[0037] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the present invention. Attached Figure Description

[0038] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a three-dimensional structural diagram of the shock-absorbing chassis provided in one embodiment of the present invention, viewed from a certain perspective.

[0040] Figure 2 This is a three-dimensional structural diagram of the shock-absorbing chassis provided in one embodiment of the present invention from another perspective;

[0041] Figure 3 This is an exploded structural diagram of a shock-absorbing chassis provided in one embodiment of the present invention;

[0042] Figure 4 This is an assembly diagram of the first action component provided in an embodiment of the present invention;

[0043] Figure 5 This is an assembly diagram of the second action component provided in one embodiment of the present invention;

[0044] Figure 6 This is a three-dimensional structural diagram of the first swing arm provided in an embodiment of the present utility model;

[0045] Figure 7 This is a three-dimensional structural diagram of the second swing arm provided in an embodiment of the present invention;

[0046] Figure 8 This is a cross-sectional view of the second swing arm provided in one embodiment of the present invention;

[0047] Figure 9This is a schematic diagram of the battery compartment and cover assembly according to an embodiment of the present invention;

[0048] Figure 10 This is a schematic diagram of the battery compartment and cover being separated according to an embodiment of the present invention;

[0049] Figure 11 This is a three-dimensional structural diagram of a wheelchair provided in an embodiment of the present invention.

[0050] Instruction manual and attached drawing numbering explanation:

[0051] 10-Wheelchair, 100-Shock-absorbing chassis, 110-Bearing component, 111-First support component, 1111-First extension, 1112-First mounting base, 112-Second support component, 1121-Second extension, 1122-Second mounting base, 113-Reinforcing component, 120-Battery compartment, 121-Bottom surface, 122-End face, 1221-First connecting seat, 123-Side surface, 1231-Second connecting seat, 1232-Second fixing part, 1233-Auxiliary support part, 1234-Reinforcing part, 1235-Matching groove, 124-Cavity, 125-Entrance, 126-Opening, 130-First drive assembly, 131-First bracket, 1311-First swing arm 1311a - First groove, 1312 - Fixing plate, 1313 - Connecting flange, 1313a - First mounting part, 132 - First wheel, 133 - Drive component, 140 - Second drive assembly, 141 - Second swing arm, 1411 - Second groove, 1412 - Second mounting part, 1413 - First clearance groove, 1414 - Second clearance groove, 142 - Caster bracket, 143 - Second wheel, 150 - First shock absorber, 160 - Second shock absorber, 170 - Tray, 171 - First fixing part, 180 - Battery, 190 - Cover, 191 - Connecting part, 192 - First connecting part, 1921 - Hanging hole, 193 - Locking component, X - Front and rear direction, Y - Left and right direction.

[0052] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit the present invention. Detailed Implementation

[0053] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0054] The flowchart shown in the attached diagram is for illustrative purposes only and does not necessarily include all content and operations / steps, nor does it necessarily have to be performed in the order described. For example, some operations / steps can be broken down, combined, or partially merged, so the actual execution order may change depending on the actual situation.

[0055] It should be understood that, in order to clearly describe the technical solutions of the embodiments of this utility model, the terms "first" and "second" are used in the embodiments of this utility model to distinguish identical or similar items with essentially the same function and effect. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, and the terms "first" and "second" are not necessarily different.

[0056] It should be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0057] It should also be understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0058] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0059] In traditional wheelchair chassis designs, the walking components are often rigidly connected directly to the chassis sidewalls. This structure has significant drawbacks: Firstly, the rigid connection concentrates road loads at the connection points on the chassis sidewalls, leading to uneven load distribution over time. Especially in complex road conditions, the impact loads on the drive components are directly transmitted to the chassis body through the rigid connection, exacerbating vibrations in the seating area. Secondly, road vibration energy is transmitted directly to the seating area through the sidewalls without buffering, resulting in poor ride stability and severely impacting user comfort. Furthermore, the sidewall connection points are subjected to alternating stress over time, which can easily lead to metal fatigue and structural cracking, posing safety hazards.

[0060] Therefore, there is an urgent need for a shock-absorbing chassis for wheelchairs to solve at least one of the above problems.

[0061] To resolve the above issues, please refer to [link / reference]. Figures 1 to 3This utility model provides a shock-absorbing chassis 100, including a load-bearing component 110, a battery compartment 120, a first drive assembly 130, a second drive assembly 140, and a first shock absorber 150.

[0062] The battery compartment 120 is mounted on the support member 110, that is, the battery compartment 120 is supported on the support member 110.

[0063] For example, the battery compartment 120 can be made of lightweight, high-strength aluminum alloy, which ensures sufficient load-bearing capacity while reducing the overall vehicle weight. Aluminum alloy has good corrosion resistance and fatigue resistance, making it suitable for long-term use. The battery compartment 120 and the load-bearing component 110 can be further fixed together by welding or other methods to increase the overall rigidity and stability of the shock-absorbing chassis 100.

[0064] The first drive assembly 130 is rotatably connected to the carrier 110, and the second drive assembly 140 is rotatably connected to the carrier 110. The first drive assembly 130 and the second drive assembly 140 are spaced apart along the front-rear direction X of the shock-absorbing chassis 100. In this embodiment of the present invention, the shock-absorbing chassis 100 includes two first drive assemblies 130 and two second drive assemblies 140. The two first drive assemblies 130 are spaced apart along the left-right direction Y, and the two second drive assemblies 140 are spaced apart along the left-right direction Y. Specifically, a first drive assembly 130 and a second drive assembly 140 are provided on the left side of the carrier 110, and a first drive assembly 130 and a second drive assembly 140 are provided on the right side of the carrier 110.

[0065] It should be noted that the forward and backward direction X refers to the forward and backward direction of the shock-absorbing chassis 100 during driving, and the left and right direction Y is perpendicular to the forward and backward direction X.

[0066] One end of the first shock absorber 150 is rotatably connected to the end face 122 of the battery compartment 120, and the other end of the first shock absorber 150 is rotatably connected to the first drive assembly 130.

[0067] It should be noted that the end face 122 of the battery compartment 120 refers to the face of one end of the battery compartment 120 along the front-back direction X, and the side face 123 of the battery compartment 120 refers to the face of one side of the battery compartment 120 along the left-right direction Y.

[0068] The provided shock-absorbing chassis 100 has at least the following beneficial effects:

[0069] 1. Improved ride stability: By introducing shock-absorbing components, vibration energy that would otherwise be directly transmitted to the seating area is absorbed and dispersed, significantly reducing the vibration felt by passengers. This allows the wheelchair 10 to maintain high ride stability under various road conditions, improving the user's riding experience.

[0070] 2. Uniform load distribution: By connecting the walking component to the load-bearing component 110 and connecting shock absorbers to the side 123 and end face 122 of the battery compartment 120, the number of connection points on the side 123 of the battery compartment 120 can be reduced, thus making the load evenly distributed.

[0071] 3. Extended Service Life: Traditional rigid connection methods are prone to metal fatigue and structural cracking. The new damping design effectively alleviates this problem by reducing the alternating stress on the side wall connection points. Therefore, this design can significantly extend the service life of the damping chassis 100 and reduce maintenance costs caused by structural damage.

[0072] 4. Enhanced Safety and Reliability: By optimizing the force transmission path and adding vibration damping measures, the overall safety of the chassis structure has been improved. In complex road conditions, this design better protects passenger safety and reduces the risk of accidents caused by vibrations.

[0073] In summary, the shock-absorbing chassis 100 and wheelchair 10 design provided by this utility model effectively solves many problems in traditional designs by introducing shock-absorbing components and optimizing the layout of the walking components, improving the driving stability and durability of the wheelchair 10, and providing users with a more comfortable and reliable travel solution.

[0074] In some embodiments, combined with Figures 2 to 4 The support member 110 includes a first support member 111 and a second support member 112 distributed along the longitudinal direction X of the shock-absorbing chassis 100. The first support member 111 has a first extension 1111 extending beyond the side 123 of the battery compartment 120, and a first drive assembly 130 is rotatably connected to the first extension 1111. The second support member 112 has a second extension 1121 extending beyond the side 123 of the battery compartment 120, and a second drive assembly 140 is rotatably connected to the second extension 1121.

[0075] In this invention, the end of the first support member 111 extends outward toward the side 123 of the battery compartment 120, thereby forming a first extension 1111; the end of the second support member 112 extends outward toward the side 123 of the battery compartment 120, thereby forming a second extension 1121. The ingenuity of this design lies in its ability to provide suitable installation space for the first drive assembly 130 and the second drive assembly 140, ensuring that the first drive assembly 130 and the second drive assembly 140 can be smoothly installed subsequently.

[0076] The first support member 111 has a first extension 1111 at both ends, and each first extension 1111 is rotatably connected to a first drive assembly 130. The second support member 112 has a second extension 1121 at both ends, and each second extension 1121 is rotatably connected to a second drive assembly 140. The first drive assembly 130 and the second drive assembly 140 are not directly mounted on the side 123 of the battery compartment 120, but are connected to the battery compartment 120 via a carrier member 110. This connection method can reduce the number of connection points on the side 123 of the battery compartment 120, effectively reducing the alternating stress borne by the connection points on the side 123. By reducing the influence of alternating stress, metal fatigue and structural cracking problems on the side 123 of the battery compartment 120 can be avoided, thereby allowing the load borne by the battery compartment 120 to be more evenly distributed.

[0077] In some embodiments, the first support member 111 and the second support member 112 can be installed at the bottom of the battery compartment 120 using screws. To further enhance stability, the first support member 111 and the second support member 112 can also be firmly fixed to the bottom of the battery compartment 120 by welding. Of course, in actual operation, the specific fixing method should be flexibly selected according to the actual situation. In addition to the screw installation and welding combination method mentioned above, the first support member 111 and the second support member 112 can also be fixed to the bottom of the battery compartment 120 in other ways, and no single fixing method is limited here.

[0078] In some embodiments, combined with Figure 4 and Figure 5 The shock-absorbing chassis 100 also includes a first mounting base 1112 and a second mounting base 1122. The first mounting base 1112 is fixedly connected to the first extension 1111, and the first drive assembly 130 is rotatably mounted on the first mounting base 1112. The second mounting base 1122 is fixedly connected to the second extension 1121, and the second drive assembly 140 is rotatably mounted on the second mounting base 1122. In this embodiment, the first mounting base 1112 can be fixedly connected to the first extension 1111 by screws, and the second mounting base 1122 can be fixedly connected to the second extension 1121 by screws. Of course, depending on the actual situation, the first mounting base 1112 can be fixedly connected to the first extension 1111 in other ways, and the second mounting base 1122 can be fixedly connected to the second extension 1121 in other ways; no single limitation is made here.

[0079] In some embodiments, combined with Figure 2 and Figure 3The support member 110 also includes a reinforcing member 113, through which the first support member 111 is connected to the second support member 112. The reinforcing member 113 can be installed at the bottom of the battery compartment 120 using screws. To further enhance stability, the reinforcing member 113 can also be firmly fixed to the bottom of the battery compartment 120 by welding. Of course, in actual operation, the specific fixing method should be flexibly selected according to the actual situation. Besides the screw installation and welding combination mentioned above, the reinforcing member 113 can also be fixed to the bottom of the battery compartment 120 in other ways; no single fixing method is limited here.

[0080] In some embodiments, the first support member 111, the reinforcing member 113, and the second support member 112 are separate parts, with the reinforcing member 113 welded to the first support member 111 and the second support member 112. Of course, the first support member 111, the reinforcing member 113, and the second support member 112 can also be a single component.

[0081] For example, the support member 110 includes two reinforcing members 113, which are symmetrically arranged at the bottom of the battery compartment 120. The first support member 111 is connected to the second support member 112 through the two reinforcing members 113. Of course, the number of reinforcing members 113 can be adjusted according to the actual situation, and is not limited here.

[0082] In some embodiments, such as Figure 4 As shown, the first drive assembly 130 includes a first bracket 131, a first wheel 132, and a drive member 133. The first wheel 132 is rotatably mounted on the first bracket 131, and the drive member 133 is fixed to the first bracket 131. The output end of the drive member 133 is connected to the first wheel 132. The first bracket 131 is rotatably connected to the first extension 1111 via a first mounting base 1112, and the other end of the first shock absorber 150 is rotatably connected to the first bracket 131.

[0083] For example, the drive unit 133 can be a motor. The output end of the motor is connected to the first wheel 132 via a gear reducer. This connection method allows power to be transmitted smoothly, effectively reducing vibration and impact during operation. This not only significantly improves the stability and reliability of the motor's output power but also greatly extends the motor's service life.

[0084] By controlling the walking speed of the first drive components 130 on both sides, straight-line or turning operations can be achieved. For example, when the walking speeds of the first drive components 130 on both sides are the same, straight-line operation can be achieved; when the walking speeds of the first drive components 130 on both sides are different, turning operation can be achieved.

[0085] In some embodiments, such as Figure 4As shown, the first bracket 131 includes a first swing arm 1311, a fixing plate 1312, and a connecting flange 1313. The first swing arm 1311 is rotatably connected to the first extension 1111, specifically by bolts to rotatably connect the first swing arm 1311 to the first mounting base 1112. The fixing plate 1312 is fixed to the first swing arm 1311, the first wheel 132 is rotatably disposed on the outer side of the fixing plate 1312, the connecting flange 1313 is fixed to the inner side of the fixing plate 1312, and the other end of the first shock absorber 150 is rotatably connected to the connecting flange 1313.

[0086] The first swing arm 1311, serving as the basic support for the first drive assembly 130, provides a stable mounting base for the fixed plate 1312, ensuring the positional stability of the first wheel 132 and the connecting flange 1313. The wheel is positioned on the outer side of the fixed plate 1312, facilitating contact with the ground and enabling rolling; this layout allows the vehicle's movement function to operate normally. The connecting flange 1313, fixed to the inner side of the fixed plate 1312, provides a reliable connection point for the first shock absorber 150, ensuring the effective installation of the shock absorption system. The connecting flange 1313, fixed to the inner side of the fixed plate 1312 and rotatably connected to the first shock absorber 150, significantly enhances the efficiency of the shock absorption system. This rotatable connection allows the first shock absorber 150 to adjust its angle accordingly to bumps and vibrations during vehicle operation, effectively absorbing and buffering the impact from the road surface. When the vehicle travels over uneven road surfaces, the first shock absorber 150 can flexibly adapt to road conditions through rotational connection with the connecting flange 1313, better disperse and mitigate impact forces, reduce the impact of vibration on the overall vehicle structure and passengers, and improve the comfort and stability of the vehicle.

[0087] In some embodiments, combined with Figure 4 and Figure 6 A first groove 1311a is provided on the side of the first swing arm 1311 facing away from the fixing plate 1312. By removing some unnecessary materials, the overall weight is effectively reduced. This is of great significance for the lightweight design of the shock-absorbing chassis 100, which not only reduces the weight of the wheelchair 10 itself, but also helps to maintain the flexibility and stability of the wheelchair 10, making it easier and more convenient for users to operate the wheelchair 10, and ensuring that the wheelchair 10 can operate smoothly under various road conditions.

[0088] In some embodiments, such as Figure 4As shown, the end face 122 of the battery compartment 120 is provided with a first connecting seat 1221, and one end of the first shock absorber 150 can be rotatably connected to the first connecting seat 1221 via a rotating shaft. The connecting flange 1313 extends in a direction away from the fixed plate 1312 and is provided with a first mounting portion 1313a. The first mounting portion 1313a and the end face 122 of the battery compartment 120 at least partially overlap in the front-rear direction X along the shock-absorbing chassis 100, that is, the end of the first mounting portion 1313a is projected onto the end face 122 of the battery compartment 120 along the front-rear direction X of the shock-absorbing chassis 100, so that the other end of the first shock absorber 150 can be rotatably connected to the first mounting portion 1313a via a rotating shaft.

[0089] In this invention, the first mounting portion 1313a and the end face 122 of the battery compartment 120 have at least partial overlap in the longitudinal direction X of the shock-absorbing chassis 100. Based on this design layout, the first shock absorber 150 is positioned in front of the battery compartment 120. This ingenious design has significant advantages, as it effectively reduces the overall width of the shock-absorbing chassis 100, thereby reducing the width of the wheelchair 10. The reduction in the width of the wheelchair 10 undoubtedly greatly improves its passability in various scenarios, allowing it to pass more smoothly through spaces such as narrow passages and porches, bringing greater convenience to the user.

[0090] In some embodiments, the device further includes a second shock absorber 160, one end of which is rotatably connected to the side of the battery compartment, and the other end of which is rotatably connected to the second drive assembly.

[0091] One end of the second shock absorber 160 is rotatably connected to the side 123 of the battery compartment 120, and the other end of the second shock absorber 160 is rotatably connected to the second drive assembly 140.

[0092] In some embodiments, such as Figure 5 As shown, the second drive assembly 140 includes a second swing arm 141, a caster bracket 142, and a second wheel 143.

[0093] The second wheel 143 is rotatably connected to the caster frame 142 via a pivot, and the caster frame 142 is rotatably connected to the second swing arm 141 via a pivot. By controlling the walking speed of the first drive components 130 on both sides, straight-line or turning operations can be achieved. The caster frame 142 rotates relative to the second swing arm 141 according to the direction of travel, thereby adjusting the travel path of the second wheel 143.

[0094] The second swing arm 141 is rotatably connected to the second extension 1121, specifically by bolts, which allow the second swing arm 141 to be rotatably connected to the second mounting base 1122. The other end of the second damping member 160 is rotatably connected to the second swing arm 141.

[0095] When the vehicle travels over uneven road surfaces, the second shock absorber 160 can flexibly adapt to road conditions by rotating with the second swing arm 141, better dispersing and mitigating impact forces, reducing the impact of vibration on the overall vehicle structure and passengers, and improving the comfort and stability of the vehicle.

[0096] In some embodiments, combined with Figure 5 , Figure 7 and Figure 8 The bottom of the second swing arm 141 is provided with a second groove 1411. By removing some unnecessary materials, the overall weight is effectively reduced. This is of great significance for the lightweight design of the shock-absorbing chassis 100, which not only reduces the weight of the wheelchair 10 itself, but also helps to maintain the flexibility and stability of the wheelchair 10, making it easier and more convenient for users to operate the wheelchair 10, and ensuring that the wheelchair 10 can operate smoothly on various road conditions.

[0097] In some embodiments, combined with Figure 5 and Figure 7 The battery compartment 120 has a second connecting seat 1231 on its side 123. One end of the second shock absorber 160 can be rotatably connected to the second connecting seat 1231 via a rotating shaft. The second swing arm 141 has a second mounting part 1412, a first clearance groove 1413 and a second clearance groove 1414. The second mounting part 1412 is located between the first clearance groove 1413 and the second clearance groove 1414. The other end of the second shock absorber 160 can be rotatably connected to the second mounting part 1412 via bolts.

[0098] In this invention, the second swing arm 141 is provided with a second mounting portion 1412, a first clearance groove 1413, and a second clearance groove 1414, with the second mounting portion 1412 located between the first clearance groove 1413 and the second clearance groove 1414. This design layout makes the connection between the second drive assembly 140 and the second shock absorber 160 more compact. This ingenious design has significant advantages, effectively reducing the overall width of the shock-absorbing chassis 100, thereby reducing the width of the wheelchair 10. The reduced width of the wheelchair 10 undoubtedly greatly improves its passability in various scenarios, allowing it to pass more smoothly through spaces such as narrow passages and porches, bringing greater convenience to the user.

[0099] In some embodiments, combined with Figure 3 and Figure 9The battery compartment 120 has a cavity 124 and an inlet 125. The inlet 125 communicates with the cavity 124. The end face 122 of the battery compartment 120 and the inlet 125 are arranged opposite each other along the front-rear direction X of the shock-absorbing chassis 100. The shock-absorbing chassis 100 also includes a tray 170 and a battery 180. The battery 180 is supported in the tray 170. The tray 170 and the battery 180 are at least partially housed in the cavity 124. The tray 170 and the battery 180 can be separated from the cavity 124 through the inlet 125.

[0100] The tray 170 and battery 180 can be separated from the cavity 124 via inlet 125, a feature that greatly improves the efficiency of battery maintenance and replacement. When the battery 180 needs charging, repair, or replacement, there is no need for a complicated disassembly process; operators can directly remove the tray 170 and battery 180 through inlet 125, making the operation simple and quick. This not only saves time and labor costs but also reduces the risk of damage to the equipment that may be caused by frequent disassembly of complex structures.

[0101] Battery 180 is electrically connected to drive component 133, and can power the motor to drive the first wheel 132 to rotate. Battery 180 is housed within battery compartment 120, ensuring safety and not affecting the layout of other components. Battery 180 is electrically connected to the motor via cable or wire, ensuring a stable power supply. Simultaneously, a battery management system (BMS) can be built into battery 180, and a microcontroller unit (MCU) can be connected between battery 180 and the motor to manage the battery's charge and control the motor's operation.

[0102] For example, in combination Figure 3 and Figure 10 The tray 170 has an integrally extended first fixing part 171, and the side 123 of the battery compartment 120 is bent and connected to a second fixing part 1232. When the tray 170 is installed in the cavity 124, the first fixing part 171 and the second fixing part 1232 are correspondingly arranged, and the first fixing part 171 and the second fixing part 1232 can be fixed together with screws.

[0103] In some embodiments, combined with Figure 9 and Figure 10 The battery compartment 120 has an opening 126 at the top, which communicates with the cavity 124. The shock-absorbing chassis 100 also includes a cover 190, which is fitted onto the top of the battery compartment 120 and covers the opening 126. This helps to protect the battery 180 from the direct impact of the external environment, thereby extending the service life of the battery 180.

[0104] For example, the battery compartment 120 is a single component. The battery compartment 120 is formed by sheet metal bending process to form a bottom surface 121, two side surfaces 123 and an end surface 122. The bottom surface 121, two side surfaces 123 and end surface 122 enclose to form a cavity 124.

[0105] The top of the side 123 of the battery compartment 120 is bent inward to form an auxiliary support portion 1233. The cover 190 is bent to form a connecting portion 191. When the cover 190 is assembled on the top of the battery compartment 120, the auxiliary support portion 1233 assists in supporting the cover 190. The connecting portion 191 is located on the outside of the side 123 and is fixed to the side 123 by a locking member 193.

[0106] Conventional battery compartments have side walls that bend outwards to form a support section. After a cover is placed over the battery compartment, locking devices are used to secure the edges of the cover to the support section. When other components of the wheelchair are placed on the cover, most of the weight is directly applied to the support section, which is prone to deformation, leading to a loose chassis structure.

[0107] In this invention, the connecting part 191 is located on the outer side of the side 123 and fixed to the side 123 by the locking member 193. When other mechanisms of the wheelchair 10 are placed on the cover, most of the weight will be applied to the side 123 of the battery compartment 120 through the connecting part 191, resulting in a uniform load distribution. The auxiliary support part 1233 is designed to provide an auxiliary support point for the cover 190. The auxiliary support part 1233 can share part of the weight of the cover 190, making the connection between the cover 190 and the battery compartment 120 more stable.

[0108] For example, the cover 190 has at least two connecting parts 191 on each of the opposite sides along the left-right direction Y. Of course, the number of connecting parts 191 can be adjusted appropriately and is not limited here.

[0109] In some embodiments, combined with Figure 9 and Figure 10 The connecting part 191 includes a first connecting part 192, which is a connecting part 191 located at one end of the cover 190 corresponding to the entrance 125. The first connecting part 192 is provided with a hanging hole 1921. When the wheelchair 10 is being transported, a rope is passed through the hanging hole 1921 to secure the wheelchair 10 and prevent it from moving during transport.

[0110] In some embodiments, a reinforcing portion 1234 extends from the side 123 of the battery compartment 120 corresponding to the first connecting portion 192, and the reinforcing portion 1234 abuts against the first connecting portion 192. The reinforcing portion 1234 can provide additional support and stability to the first connecting portion 192, effectively preventing deformation of the first connecting portion 192, thereby ensuring the stability and reliability of the entire structure.

[0111] In some embodiments, the area of ​​the reinforcing part 1234 is smaller than the area of ​​the first connecting part 192. The reinforcing part 1234 is provided with a mating groove 1235, which overlaps with the hanging hole 1921. This can prevent the reinforcing part 1234 from interfering with the hanging hole 1921, so that a rope can be passed through the hanging hole 1921.

[0112] In some embodiments, the two ends of the cover 190 are suspended along the front-rear direction X of the shock-absorbing chassis 100, that is, the length of the cover 190 is greater than the length of the battery compartment 120, which can provide sufficient area for other mechanisms of the wheelchair 10 and facilitate installation.

[0113] In some embodiments, the shock-absorbing chassis 100 further includes a camera, a lidar sensor, a display screen, and ultrasonic sensors. The camera is mounted at the front and rear of the shock-absorbing chassis 100 to acquire visual information. The lidar sensor is mounted at the front of the shock-absorbing chassis 100 to acquire accurate distance information. The ultrasonic sensors, as auxiliary sensors, are mounted around the shock-absorbing chassis 100 for near-range obstacle detection. The display screen provides a user interface for passengers and can be a touchscreen or voice control.

[0114] Computer vision technology is used to process images captured by cameras to identify obstacles such as road signs, pedestrians, and vehicles. Point cloud processing technology is used to process data captured by LiDAR to generate high-precision maps and obstacle location information. Ultrasonic sensor data is used for near-range obstacle detection, supplementing the blind spots of LiDAR and cameras.

[0115] Based on map information and the destination, an optimal path from the origin to the destination is generated. The path is dynamically adjusted according to real-time environmental perception information to avoid obstacles. For fixed obstacles, such as walls and pillars, a safe obstacle avoidance path is calculated through joint perception using LiDAR and cameras. For moving obstacles, such as pedestrians and other vehicles, the path is adjusted in real time to avoid these obstacles by predicting their trajectories.

[0116] Based on the path planning results, the speed of the motor in the first drive assembly 130 is controlled to ensure smooth driving. The direction of the shock-absorbing chassis 100 is controlled by adjusting the angles of the first swing arm 1311 and the second swing arm 141. In case of emergency, the braking system is activated in a timely manner to ensure passenger safety.

[0117] The combined perception of cameras, LiDAR, and ultrasonic sensors improves the accuracy and reliability of environmental awareness. It effectively avoids both static and dynamic obstacles, reducing the risk of collisions. Advanced control algorithms ensure the shock-absorbing chassis 100 travels smoothly on complex road surfaces, minimizing bumps. Based on real-time environmental information, it dynamically adjusts the path to avoid unnecessary detours, enhancing the riding experience.

[0118] In summary, by combining visual perception and lidar with an automatic obstacle avoidance and intelligent driving system, not only is the safety and comfort of the shock-absorbing chassis 100 improved, but its autonomy and flexibility are also enhanced. This design makes the shock-absorbing chassis 100 more stable and comfortable when driving on complex road surfaces, while also improving the overall system's reliability and durability.

[0119] Meanwhile, to ensure the shock-absorbing chassis 100 can move stably under different passenger weights and injury locations, an adaptive control algorithm based on the provided chassis structure is provided. This algorithm dynamically adjusts the parameters of the axle components according to the passenger's weight and injury location to optimize driving stability and comfort.

[0120] Input is passenger weight: obtained via a weighing sensor installed under the seat. Injury location: obtained through the user interface or preset configuration, such as spinal cord injury, lower limb injury, etc.

[0121] The output includes at least: Motor speed: controlling the motor speed of the first drive assembly 130. Swing arm angle: adjusting the angle of the first swing arm 1311 and the second swing arm 141. Braking force: controlling the braking force of the braking system.

[0122] The center of gravity is calculated based on the passenger's weight. A more rearward-shifted center of gravity requires more forward drive force to maintain balance. Heavier passengers require greater drive force, so the motor speed can be increased accordingly. Heavier passengers may cause the vehicle to tilt backward, which can be balanced by adjusting the swing arm angle. For example, increasing the angle of the first swing arm 1311 (making it more tilted) provides greater support.

[0123] For passengers with spinal cord injuries, special attention needs to be paid to reducing bumps and vibrations. Stability can be improved by reducing motor speed and increasing the swing arm angle. For passengers with lower limb injuries, the focus is on maintaining a smooth ride. This can be achieved by adjusting the swing arm angle and motor speed.

[0124] A PID controller is used to dynamically adjust the motor speed and swing arm angle to maintain a stable driving state. The proportional term (P) is adjusted based on the current error (the difference between the actual speed and the target speed). The integral term (I) eliminates steady-state error and ensures long-term stability. The derivative term (D) predicts future error changes and adjusts them in advance. Simultaneously, an autonomous driving model based on the shock-absorbing chassis 100 can be trained based on historical operating data. This embodiment of the invention does not limit the algorithm corresponding to the controller.

[0125] Battery compartment shock absorption chassis. The second aspect of the shock absorption chassis, such as... Figure 11As shown, the present invention provides a wheelchair 10, including a shock-absorbing chassis 100 as provided in any embodiment of the present invention.

[0126] By incorporating the provided shock-absorbing chassis 100, the safety, comfort, autonomy, flexibility, and reliability of the wheelchair 10 are significantly improved. This design not only enhances the passenger's user experience but also strengthens the overall performance of the system, enabling it to operate stably and efficiently in various complex environments.

[0127] The provided chassis structure includes the shock-absorbing chassis 100 provided in any embodiment of this utility model. For example, the provided shock-absorbing chassis 100 includes a support member 110, a battery compartment 120, a first drive assembly 130, a second drive assembly 140, a first shock absorber 150, and a second shock absorber 160. The battery compartment 120 is disposed on the support member 110. The first drive assembly 130 is rotatably connected to the support member 110, and the second drive assembly 140 is rotatably connected to the support member 110, with the first drive assembly 130 and the second drive assembly 140 spaced apart along the front-rear direction X of the shock-absorbing chassis 100. One end of the first shock absorber 150 is rotatably connected to the end face 122 of the battery compartment 120, and the other end of the first shock absorber 150 is rotatably connected to the first drive assembly 130. One end of the second shock absorber 160 is rotatably connected to the side face 123 of the battery compartment 120, and the other end of the second shock absorber 160 is rotatably connected to the second drive assembly 140.

[0128] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A shock-absorbing chassis, characterized in that, include: Load-bearing components; The battery compartment is located on the support member; The first drive assembly is rotatably connected to the carrier; The first shock absorber has one end rotatably connected to the end face of the battery compartment, and the other end rotatably connected to the first drive assembly. The second drive assembly is rotatably connected to the carrier, and the battery compartments are spaced apart from the first drive assembly along the front-rear direction of the shock-absorbing chassis.

2. The shock-absorbing chassis according to claim 1, characterized in that, The load-bearing components include a first support and a second support distributed along the front-rear direction of the shock-absorbing chassis; The first support member has a first extension extending beyond the side of the battery compartment, and the first drive assembly is rotatably connected to the first extension; The second support member has a second extension extending beyond the side of the battery compartment, and the second drive assembly is rotatably connected to the second extension.

3. The shock-absorbing chassis according to claim 2, characterized in that, The first drive assembly includes a first bracket, a first wheel, and a drive member. The first wheel is rotatably mounted on the first bracket, the drive member is fixed to the first bracket, and the output end of the drive member is connected to the first wheel. The first bracket is rotatably connected to the first extension, and the other end of the first shock absorber is rotatably connected to the first bracket.

4. The shock-absorbing chassis according to claim 3, characterized in that, The first bracket includes a first swing arm, a fixing plate, and a connecting flange; The first swing arm is rotatably connected to the first extension, the fixing plate is fixed to the first swing arm, the first wheel is rotatably disposed on the outside of the fixing plate, the connecting flange is fixed to the inside of the fixing plate, and the other end of the first shock absorber is rotatably connected to the connecting flange.

5. The shock-absorbing chassis according to claim 4, characterized in that, The end face of the battery compartment is provided with a first connecting seat, and one end of the first shock absorber is rotatably connected to the first connecting seat; The connecting flange extends in a direction away from the fixed plate and has a first mounting portion. The first mounting portion at least partially overlaps with the end face of the battery compartment in the front-rear direction along the shock-absorbing chassis. The other end of the first shock absorber is rotatably connected to the first mounting portion.

6. The shock-absorbing chassis according to claim 2, characterized in that, Also includes: The second shock absorber has one end rotatably connected to the side of the battery compartment and the other end rotatably connected to the second drive assembly.

7. The shock-absorbing chassis according to claim 6, characterized in that, The second drive assembly includes a second swing arm, a caster frame, and a second wheel. The caster frame is connected to the second swing arm, and the second wheel is rotatably connected to the caster frame. The second swing arm is rotatably connected to the second extension, and the other end of the second shock absorber is rotatably connected to the second swing arm.

8. The shock-absorbing chassis according to claim 7, characterized in that, The side of the battery compartment is provided with a second connecting seat, and one end of the second shock absorber is rotatably connected to the second connecting seat; The second swing arm is provided with a second mounting part, a first clearance groove and a second clearance groove. The second mounting part is located between the first clearance groove and the second clearance groove, and the other end of the second shock absorber is rotatably connected to the second mounting part.

9. The shock-absorbing chassis according to any one of claims 1-8, characterized in that, The battery compartment has a cavity and an inlet, the inlet is connected to the cavity, and the end face of the battery compartment and the inlet are arranged opposite to each other along the front-rear direction of the shock-absorbing chassis; The shock-absorbing chassis also includes a tray and a battery, the battery being supported within the tray, the tray and the battery being at least partially housed within the cavity, and the tray and the battery being detachable from the cavity via the inlet.

10. A wheelchair, characterized in that, The shock-absorbing chassis includes any one of claims 1 to 9.

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