Transporter

Abstract

The present application discloses a transport vehicle, which relates to the technical field of transport equipment. The transport vehicle includes a chassis and a floating drive device, wherein: the floating drive device includes a driving bracket, a boosting bracket, a first elastic member and a driving wheel, the driving bracket and the boosting bracket can be movably arranged on the chassis, the driving wheel is arranged on the driving bracket, the first elastic member is connected between the driving bracket and the boosting bracket, and when the weight of the load on the transport vehicle is greater than a preset value, the boosting bracket moves relative to the chassis to drive the driving bracket to move relative to the chassis through the first elastic member to press the driving wheel. This solution can solve the problem of insufficient grip of the driving wheel of the current transport vehicle.

Description

Technical Field

[0001] The present application belongs to the technical field of transportation equipment, and specifically relates to a transport vehicle. Background Art

[0002] With the rapid development of intelligent logistics, intelligent transport vehicles have been favored by many users, such as AGV (Automated Guided Vehicle), which can not only save labor, but also greatly improve labor productivity.

[0003] The driving device is the power equipment for the truck to travel. Usually, a floating driving device is used to adapt to the height changes of the ground, so as to achieve floating operation and achieve the purpose of stable driving. In practical applications, the floating driving device usually adopts a single-point support structure, that is, one end is a hinged end, and the other end is a floating end directly installed with a compression spring. However, when the weight of the load is much greater than the dead weight of the truck, the floating driving device has the problem of insufficient grip of the driving wheel. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a transport vehicle that can solve the problem of insufficient grip of the driving wheels of current transport vehicles.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] The embodiment of the present application provides a transport vehicle, including a chassis and a floating drive device, wherein:

[0007] The floating drive device comprises a drive bracket, a boost bracket, a first elastic member and a drive wheel. The drive bracket and the boost bracket can be movably arranged on the chassis. The drive wheel is arranged on the drive bracket. The first elastic member is connected between the drive bracket and the boost bracket.

[0008] When the weight of the load on the transport vehicle is greater than a preset value, the booster bracket moves relative to the chassis to drive the driving bracket to move relative to the chassis through the first elastic member to press the driving wheel.

[0009] Optionally, the transport vehicle further comprises a second elastic member, wherein the second elastic member is connected between the driving bracket and the chassis.

[0010] When the transport vehicle is in an unloaded state, the first elastic member drives the driving bracket to move relative to the chassis to press the driving wheel.

[0011] Optionally, the driving bracket is hinged to the chassis, and the boost bracket is hinged to the chassis.

[0012] When the weight of the load on the transport vehicle is greater than the preset value, the booster bracket rotates relative to the chassis, so as to drive the driving bracket to rotate relative to the chassis through the first elastic member.

[0013] Optionally, the driving bracket is hinged to the chassis via a second connecting shaft, and the driving bracket has a driving wheel connecting portion and an elastic member connecting portion, and the driving wheel connecting portion and the elastic member connecting portion are respectively located on both sides of the second connecting shaft.

[0014] The driving wheel connecting portion has a first end and a second end which are arranged opposite to each other along the extending direction of the second connecting shaft, the driving wheel is connected to the first end of the driving wheel connecting portion, and the driving wheel and the driving wheel connecting portion are arranged along the extending direction of the second connecting shaft,

[0015] The elastic member connecting portion is connected to the first elastic member, the boost bracket is located on a side of the elastic member connecting portion away from the driving wheel connecting portion, and the second elastic member is located between the first elastic member and the second connecting shaft.

[0016] Optionally, the chassis includes a main body and a protective cover, wherein the protective cover is arranged on the main body, and the transport vehicle further includes casters, wherein the casters are arranged on the main body, and at least a portion of the casters is located in the accommodation space of the protective cover.

[0017] The boost bracket includes a second base and a boost arm, the second base is arranged on the protective cover, the boost arm is hinged to the second base, the boost arm has a load-bearing end and a connecting end, and the first elastic member is connected between the elastic member connecting portion and the connecting end of the boost arm.

[0018] Optionally, the driving bracket is hinged to the chassis via a second connecting shaft, and the driving bracket has a driving wheel connecting portion and an elastic member connecting portion, and the driving wheel connecting portion and the elastic member connecting portion are respectively located on both sides of the second connecting shaft.

[0019] The driving wheel connecting portion has a first end and a second end which are arranged opposite to each other along the extending direction of the second connecting shaft, the driving wheel is connected to the first end of the driving wheel connecting portion, and the driving wheel and the driving wheel connecting portion are arranged along the extending direction of the second connecting shaft,

[0020] The elastic member connecting portion is connected to the first elastic member, at least a portion of the boost bracket is located between the driving wheel connecting portion and the elastic member connecting portion, and the second elastic member is located on a side of the first elastic member away from the driving wheel connecting portion.

[0021] Optionally, the chassis includes a main body and a protective cover, wherein the protective cover is arranged on the main body, and the transport vehicle further includes casters, wherein the casters are arranged on the main body, and at least a portion of the casters is located in the accommodation space of the protective cover.

[0022] The transport vehicle further includes a first base, the first base is disposed on the protective cover, and the second elastic member is connected between the first base and the elastic member connecting portion.

[0023] Optionally, the boost arm has a load-bearing end and a connecting end, the driving bracket is provided with a first avoidance hole, the boost bracket is passed through the first avoidance hole, and the load-bearing end and the connecting end of the boost bracket both extend outside the first avoidance hole.

[0024] Optionally, in any of the above embodiments, the boost bracket has a load-bearing end, and the transport vehicle further includes a first connecting shaft and a roller group, the roller group is sleeved on the first connecting shaft, and the first connecting shaft is arranged at the load-bearing end of the boost bracket.

[0025] Optionally, the driving bracket is slidably connected to the chassis, and the boost bracket is slidably connected to the chassis.

[0026] When the weight of the load on the transport vehicle is greater than the preset value, the booster bracket slides in a first direction relative to the chassis, so as to drive the driving bracket to slide in the first direction relative to the chassis through the first elastic member.

[0027] Optionally, there is a accommodating space between the driving bracket and the boosting bracket, and the second elastic member and the first elastic member are both arranged in the accommodating space. The number of the second elastic members and the first elastic members is at least two. In the driving direction of the transport vehicle, the second elastic members are respectively arranged on both sides of the driving wheel, and the first elastic members are respectively arranged on both sides of the driving wheel.

[0028] Optionally, the booster bracket has a load-bearing end, the transport vehicle further comprises a top plate and a plurality of support columns, the top plate is connected to the chassis via the support columns, and the plurality of support columns are arranged between the chassis and the top plate.

[0029] The top plate is provided with a second avoidance hole, and the load-bearing end of the booster bracket is exposed in the second avoidance hole; or,

[0030] The top plate is movably connected to the chassis via at least one of the support columns, and the bottom surface of the top plate contacts the bearing end of the booster bracket to press the bearing end of the booster bracket.

[0031] In the embodiment of the present application, when the weight of the load on the transport vehicle is greater than a preset value, the booster bracket moves relative to the chassis due to the force from the load, so as to drive the drive bracket to move relative to the chassis through the first elastic member to press the drive wheel, thereby increasing the grip of the drive wheel to prevent the transport vehicle from tilting due to insufficient grip of the drive wheel. It can be seen that the embodiment of the present application can solve the problem of insufficient grip of the drive wheel of the current transport vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural schematic diagram of the floating drive device disclosed in the embodiment of the present application;

[0033] Figures 2 to 3 It is a schematic diagram of the structure of the transport vehicle disclosed in the embodiment of the present application at different viewing angles;

[0034] Figure 4 A schematic diagram of a portion of the structure of a transport vehicle disclosed in an embodiment of the present application;

[0035] Figure 5 It is a structural schematic diagram of the transport vehicle disclosed in the embodiment of the present application in a loaded state;

[0036] Figure 6 This is a schematic structural diagram of the transport vehicle disclosed in the embodiment of the present application in an unloaded state;

[0037] Figures 7 and 8 This is a schematic structural diagram of a transport vehicle disclosed in yet another embodiment of the present application at different viewing angles;

[0038] Fig. 9 It is a structural schematic diagram of a floating drive device disclosed in another embodiment of the present application;

[0039] Fig.10 A schematic diagram of the structure of a transport vehicle disclosed in another embodiment of the present application;

[0040] Fig.11 A partial structural schematic diagram of a transport vehicle disclosed in another embodiment of the present application;

[0041] Figure 12 to Figure 13 It is a schematic structural diagram of a floating drive device disclosed in another embodiment of the present application at different viewing angles;

[0042] Figure 14 to Figure 15 It is a schematic structural diagram of a transport vehicle disclosed in another embodiment of the present application at different viewing angles;

[0043] Fig.16 This is a partial structural schematic diagram of a transport vehicle disclosed in yet another embodiment of the present application.

[0044] Description of reference numerals:

[0045] 100-chassis, 110-main body, 120-protective cover;

[0046] 200-floating drive device, 210-driving bracket, 211-first connection, 212-driving wheel connection part, 213-elastic member connection part, 220-boosting bracket, 221-second base, 222-boosting arm, 223-second connection, 230-second elastic member, 240-first elastic member, 250-driving wheel;

[0047] 300-castors;

[0048] 400-first base;

[0049] 500-first connecting shaft;

[0050] 600-roller set;

[0051] 700-top plate, 710-second avoidance hole;

[0052] 800-support column;

[0053] 901-nut, 902-first support, 903-second support, 904-third support, 905-fourth support, 910-second connecting shaft, 920-third connecting shaft, 930-first rotating shaft, 940-second rotating shaft, 950-third rotating shaft, 960-fourth rotating shaft, 970-first sliding member, 980-second sliding member, 990-load. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0055] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0056] The transport vehicle provided in the embodiment of the present application is described in detail below through specific embodiments and their application scenarios in conjunction with the accompanying drawings.

[0057] Embodiment 1

[0058] like Figures 1 to 8 As shown, the embodiment of the present application discloses a transport vehicle, which can be an AGV (Automated Guided Vehicle), or other intelligent transport vehicles, which are not specifically limited here. The transport vehicle includes a chassis 100 and a floating drive device 200.

[0059] The chassis 100 is a basic component of the transport vehicle, and can provide a foundation for other structures of the transport vehicle. A power device for providing power to the transport vehicle can be installed on the chassis 100 .

[0060] The floating drive device 200 includes a drive bracket 210, a boost bracket 220, a second elastic member 230, a first elastic member 240 and a drive wheel 250. The drive bracket 210 and the boost bracket 220 can be movably arranged on the chassis 100. The drive wheel 250 is arranged on the drive bracket 210. Optionally, the drive wheel 250 can be arranged on the side of the drive bracket 210, that is, the drive wheel 250 and the drive bracket 210 are arranged side by side, so as to reduce the height of the transport vehicle. When the drive wheel 250 receives the driving force from the power device, the driving force can make the drive wheel 250 rotate, and the drive wheel 250 drives the entire transport vehicle to move, so as to ensure the normal driving of the transport vehicle. The second elastic member 230 is connected between the driving bracket 210 and the chassis 100, and the first elastic member 240 is connected between the driving bracket 210 and the boosting bracket 220. Optionally, the second elastic member 230 and the first elastic member 240 can both be spring structures, etc., and no specific restrictions are made here; further optionally, the second elastic member 230 and the driving bracket 210 and the chassis 100, and the first elastic member 240 and the driving bracket 210 and the boosting bracket 220 can be connected by hanging, welding, etc., and no specific restrictions are made here.

[0061] When the transport vehicle is unloaded, the second elastic member 230 is pressed by the chassis 100, and the driving bracket 210 is driven to move relative to the chassis 100 to press the driving wheel 250. There is a grip between the driving wheel 250 and the ground, so that the driving wheel 250 can travel. Of course, the transport vehicle may not be provided with the second elastic member 230.

[0062] When the weight of the load 990 on the transport vehicle is greater than a preset value, the booster bracket 220 is subjected to the force from the load 990 and moves relative to the chassis 100, so as to drive the drive bracket 210 to move relative to the chassis 100 through the first elastic member 240, so as to press the drive wheel 250, thereby increasing the grip of the drive wheel 250, so as to prevent the transport vehicle from tilting due to insufficient grip of the drive wheel 250. Therefore, the embodiment of the present application can solve the problem of insufficient grip of the drive wheel 250 in the current transport vehicle.

[0063] It should be noted that the preset value in the embodiment of the present application can be the deadweight of the transport vehicle, and of course it can also be other values, as long as the weight of the load 990 on the transport vehicle can drive the booster bracket 220 to move relative to the chassis 100, and drive the driving bracket 210 to move relative to the chassis 100 through the first elastic member 240, there is no specific limitation here.

[0064] Optionally, the number of floating drive devices 200 is at least two, including a first floating drive device and a second floating drive device, and the first floating drive device and the second floating drive device are arranged at intervals in a direction perpendicular to the driving direction of the transport vehicle and parallel to the rotation axis of the driving wheel 250, that is, in the width direction of the transport vehicle, thereby further increasing the grip of the driving wheel 250.

[0065] In an optional embodiment, the driving bracket 210 is hinged to the chassis 100, that is, the driving bracket 210 can rotate relative to the chassis 100. Optionally, the transport vehicle further includes a second connecting shaft 910, which is arranged on the driving bracket 210, and the driving bracket 210 is hinged to the chassis 100 through the second connecting shaft 910. Of course, the driving bracket 210 can also be rotatably connected to the chassis 100 in other ways, which is not specifically limited here. The booster bracket 220 is hinged to the chassis 100, that is, the booster bracket 220 can rotate relative to the chassis 100. Optionally, the transport vehicle further includes a third connecting shaft 920, which is arranged on the booster bracket 220, and the booster bracket 220 is rotatably connected to the chassis 100 through the third connecting shaft 920. Of course, the booster bracket 220 can also be rotatably connected to the chassis 100 in other ways, which is not specifically limited here. This connection method requires a smaller movement space, so it is more convenient for the structural design of the transport vehicle. When the weight of the load 990 on the transport vehicle is greater than a preset value, the booster bracket 220 rotates relative to the chassis 100, so as to drive the driving bracket 210 to rotate relative to the chassis 100 through the first elastic member 240. The rotation of the booster bracket 220 relative to the chassis 100 and the rotation of the driving bracket 210 relative to the chassis 100 in the embodiment of the present application can be arranged based on the lever principle to achieve force transmission, thereby ensuring that the driving wheel 250 has sufficient grip to prevent the driving wheel 250 from slipping or tilting.

[0066] In an optional embodiment, the driving bracket 210 has a driving wheel connection portion 212 and an elastic member connection portion 213, the driving wheel connection portion 212 and the elastic member connection portion 213 are respectively located on both sides of the second connecting shaft 910, the driving wheel connection portion 212 has a first end and a second end that are arranged opposite to each other along the extension direction of the second connecting shaft 910, the driving wheel 250 is connected to the first end of the driving wheel connection portion 212, and the driving wheel 250 and the driving wheel connection portion 212 are arranged along the extension direction of the second connecting shaft 910, the elastic member connection portion 213 is connected to the first elastic member 240, the booster bracket 220 is located on the side of the elastic member connection portion 213 away from the driving wheel connection portion 212, and the second elastic member 230 is located between the first elastic member 240 and the second connecting shaft 910. At this time, the booster bracket 220 is far away from the driving wheel 250, and the acting force between the various components of the transport vehicle is more dispersed, so it is not easy for the transport vehicle to be damaged due to excessive local force.

[0067] Optionally, the driving wheel connection portion 212 of the driving bracket 210 and the elastic member connection portion 213 of the driving bracket 210 can be arranged in a straight line. In this case, the driving bracket 210 is a straight bar structure, which is not only inconvenient for the driving bracket 210 to be hinged to the chassis 100, but also the straight bar structure occupies a large space; therefore, optionally, the elastic member connection portion 213 is bent relative to the driving wheel connection portion 212. Optionally, the driving bracket 210 can be in a V-shaped structure to facilitate the hinge connection of the driving bracket 210 to the chassis 100 and reduce the space occupied by the driving bracket 210; further optionally, the connection between the driving wheel connection portion 212 and the elastic member connection portion 213 can be a first connection portion 211, and the first connection portion 211 can be hinged to the chassis 100 through a second connecting shaft 910, so as to facilitate the driving bracket 210 to rotate around the hinge shaft.

[0068] Optionally, the transport vehicle also includes a first base 400, which is arranged on the chassis 100, and the second elastic member 230 is hinged between the first base 400 and the driving bracket 210, and the driving bracket 210 is hinged to the first base 400 through the second connecting shaft 910 to facilitate the connection between the driving bracket 210 and the chassis 100.

[0069] In a further optional embodiment, the chassis 100 includes a main body 110 and a protective cover 120, and the protective cover 120 is arranged on the main body 110. The transport vehicle also includes casters 300, and the casters 300 are used for the movement of the transport vehicle. Optionally, the casters 300 can be universal wheels, so that the transport vehicle can rotate 360° in a horizontal plane; further optionally, the number of casters 300 is at least four, and each caster 300 is arranged at intervals along the edge of the chassis 100, so as to increase the contact area between the transport vehicle and the ground and improve the stability of the transport vehicle; further optionally, in the driving direction of the transport vehicle, the driving wheel 250 is arranged between adjacent casters 300. Since the driving wheel 250 is the active wheel and the caster 300 is the driven wheel, the driving wheel 250 is arranged between adjacent casters 300, which can not only improve the driving efficiency of the driving wheel 250, but also the two adjacent casters 300 are subjected to almost the same driving force, thereby avoiding the tilting of the transport vehicle. The caster 300 is disposed on the main body 110. Optionally, a through hole is provided at the edge of the main body 110, and one end of the caster 300 passes through the through hole and contacts the ground, so that the structure of the entire transport vehicle is more compact, which is conducive to improving the stability of the transport vehicle. At least part of the caster 300 is located in the accommodating space of the protective cover 120. Since the caster 300 moves on the ground, and there are inevitably dust, water stains and other debris on the ground, the debris is easily carried to the caster 300, and then falls on the chassis 100 and other structures. Therefore, by providing the protective cover 120, dust, water stains and other debris can be prevented from falling on the chassis 100 and other structures.

[0070] Optionally, the boost bracket 220 includes a second base 221 and a boost arm 222, and the second base 221 is arranged on the protective cover 120. In this case, the protective cover 120 serves as the setting basis of the boost bracket 220 to facilitate the connection between the boost bracket 220 and the chassis 100. Of course, an additional support can also be directly arranged on the chassis 100 to facilitate the hinge connection between the boost bracket 220 and the chassis 100. However, compared with the method of setting the second base 221 on the protective cover 120, this method will increase the number of parts of the transport vehicle, increase the installation workload and production cost, and therefore, the protective cover 120 in the embodiment of the present application has a dual-purpose effect.

[0071] The booster arm 222 is hinged to the second base 221. Optionally, the third connecting shaft 920 can be provided on the second base 221, so that the booster arm 222 is rotatably connected to the second base 221 through the third connecting shaft 920. The booster arm 222 has a load-bearing end and a connecting end. The first elastic member 240 is connected between the elastic member connecting portion 213 of the driving bracket 210 and the connecting end of the booster arm 222. The load 990 on the transport vehicle can be pressed on the load-bearing end of the booster arm 222, thereby realizing the transmission of the force.

[0072] The structure of the booster bracket 220 can be flexibly set. Optionally, the load-bearing end of the booster arm 222 and the connecting end of the booster arm 222 can be set in a straight line. In this case, the booster bracket 220 is a straight bar structure, but the straight bar structure occupies a large space and is easy to interfere with other structures during the rotation of the booster bracket 220; therefore, optionally, the booster bracket 220 includes a first part and a second part connected, the load-bearing end of the booster arm 222 is set at the first part, and the connecting end of the booster arm 222 is set at the second part, and the first part is bent relative to the second part. Optionally, the booster bracket 220 can be an L-shaped structure, thereby reducing the space occupied by the booster bracket 220 and avoiding interference with other structures during the rotation of the booster bracket 220. Further optionally, the connection between the first part and the second part is a second connection 223, and the second connection 223 can be hinged to the protective cover 120 through a third connecting shaft 920, so that the booster bracket 220 can rotate around the hinge axis.

[0073] Optionally, the transport vehicle also includes a first rotating shaft 930 and a second rotating shaft 940, and the first elastic member 240 is rotatably connected to the connecting end of the boost bracket 220 via the first rotating shaft 930, and the first elastic member 240 is rotatably connected to the elastic member connecting part of the driving bracket 210 via the second rotating shaft 940. At this time, the two ends of the first elastic member 240 have more degrees of freedom, thereby improving the rotational flexibility of the boost bracket 220 and the driving bracket 210.

[0074] Optionally, the transport vehicle also includes a third rotating shaft 950 and a fourth rotating shaft 960. The second elastic member 230 is rotatably connected to the driving bracket 210 via the third rotating shaft 950, and the second elastic member 230 is rotatably connected to the first base 400 via the fourth rotating shaft 960. At this time, the two ends of the second elastic member 230 have more degrees of freedom, thereby improving the rotation flexibility of the driving bracket 210.

[0075] Further optionally, the second elastic member 230 and the first elastic member 240 can be respectively hung on the third rotating shaft 950, the fourth rotating shaft 960, the first rotating shaft 930 and the second rotating shaft 940, but the stress of this arrangement is more concentrated, which is easy to damage the second elastic member 230 and the first elastic member 240; therefore, optionally, the transport vehicle also includes a first support 902, a second support 903, a third support 904 and a fourth support 905, the second elastic member 230 is connected to the third rotating shaft 950 and the fourth rotating shaft 960 respectively through the first support 902 and the second support 903, and the first elastic member 240 is connected to the first rotating shaft 930 and the second rotating shaft 940 respectively through the third support 904 and the fourth support 905 to increase the connection area, thereby protecting the second elastic member 230 and the first elastic member 240.

[0076] In an optional embodiment, the booster bracket 220 has a load-bearing end, and the transport vehicle further includes a top plate 700 and a plurality of support columns 800. The top plate 700 is connected to the chassis 100 through each support column 800. The top plate 700 serves as a load-bearing member for the load 990. Optionally, the top plate 700 can be made of sheet metal, and of course, can also be made of other materials with strong rigidity, which is not specifically limited here. The plurality of support columns 800 are all arranged between the chassis 100 and the top plate 700. The arrangement of the support columns 800 can prevent the top plate 700 from directly pressing against the drive bracket 210 and other structures arranged on the chassis 100, so as to protect the structure arranged between the chassis 100 and the top plate 700.

[0077] In an optional embodiment, the top plate 700 is provided with a second avoidance hole 710, and the load-bearing end of the booster bracket 220 is exposed in the second avoidance hole 710. At this time, the load 990 borne by the transport vehicle is directly pressed onto the load-bearing end, which can prevent the load-bearing end from damaging the top plate 700, thereby protecting the top plate 700.

[0078] In another optional embodiment, the top plate 700 is movably connected to the chassis 100 through at least one support column 800, and the bottom surface of the top plate 700 contacts the load-bearing end of the boost bracket 220 to press the load-bearing end of the boost bracket 220. At this time, due to the large area of ​​the top plate 700, it can be suitable for loads 990 of various sizes. Optionally, each support column 800 can be arranged at intervals along the edge of the chassis 100. At this time, the end of the top plate 700 away from the load-bearing end can be hinged to the support column 800, and the end of the top plate 700 close to the load-bearing end can have a gap with the support column to facilitate the movement of the boost bracket 220 and limit the rotation angle of the top plate 700; Optionally, each support column 800 can be arranged at intervals along the edge of the chassis 100. At this time, the multiple support columns 800 arranged between the top plate 700 and the chassis 100 can be relative to the top plate. 700 or the chassis 100 slides, and a limiter can be additionally provided to limit the sliding distance of the top plate 700. When the weight of the load 990 borne by the transport vehicle is greater than a preset value, the booster bracket 220 can move relative to the chassis 100. Of course, part of the support columns 800 can be arranged in the central area of ​​the chassis 100, and another part of the support columns 800 can be arranged at the edge of the chassis 100. As long as the booster bracket 220 can move relative to the chassis 100, the embodiment of the present application does not impose any specific limitation on this.

[0079] Embodiment 2

[0080] refer to Figures 9 to 11As shown, the same contents as those in Example 1 are not repeated here. The difference lies in the setting position of the boost bracket 220. Specifically, the driving bracket 210 is hinged to the chassis 100 through the second connecting shaft 910, and the driving bracket 210 has a driving wheel connecting portion 212 and an elastic member connecting portion 213. The driving wheel connecting portion 212 and the elastic member connecting portion 213 are respectively located on both sides of the second connecting shaft 910, and the driving wheel connecting portion 212 has a first end and a second end that are arranged opposite to each other along the extension direction of the second connecting shaft 910. The driving wheel 250 is connected to the first end of the driving wheel connecting portion 212, and the driving wheel 250 and the driving wheel connecting portion 212 are arranged along the extension direction of the second connecting shaft 910. The elastic member connecting portion 213 is connected to the first elastic member 240, and at least a portion of the boost bracket 220 is located between the driving wheel connecting portion 212 and the elastic member connecting portion 213. The second elastic member 230 is located on the side of the first elastic member 240 away from the driving wheel connecting portion 212. At this time, the distance between the booster bracket 220 and the driving wheel 250 is relatively close, and the structures of the floating driving device 200 are more compact, which can reduce the occupied space of the entire floating driving device 200 and prevent the transport vehicle from tilting due to unstable center of gravity.

[0081] Optionally, when the chassis 100 includes the main body 110 and the protective cover 120, the transport vehicle further includes a first base 400, the first base 400 is arranged on the protective cover 120, and the second elastic member 230 is connected between the first base 400 and the elastic member connecting portion 213 of the driving bracket 210. The protective cover 120 serves as a setting base for the driving bracket 210, so as to facilitate the connection between the driving bracket 210 and the chassis 100. Of course, an additional support can also be directly arranged on the chassis 100 to facilitate the hinge connection between the driving bracket 210 and the chassis 100. However, this method will increase the number of parts of the transport vehicle relative to the method of arranging the first base 400 on the protective cover 120, and will increase the installation workload and production cost. Therefore, the protective cover 120 in the embodiment of the present application has the effect of serving two purposes.

[0082] The boost bracket 220 can be arranged side by side with the driving bracket 210. In this case, the floating driving device 200 occupies a larger space; therefore, optionally, the boost arm 222 has a load-bearing end and a connecting end, the driving bracket 210 is provided with a first avoidance hole, the boost bracket 220 is passed through the first avoidance hole, and the load-bearing end and the connecting end of the boost bracket 220 both extend outside the first avoidance hole, thereby further reducing the space occupied by the floating driving device 200 and making the various structures of the floating driving device 200 more compact.

[0083] Optionally, the booster bracket 220 includes a second base 221 and a booster arm 222, the second base 221 is arranged on the main body 110, the booster arm 222 has a load-bearing end and a connecting end, the first elastic member 240 is connected between the elastic member connecting portion 213 of the driving bracket 210 and the connecting end of the booster arm 222, and the load 990 on the transport vehicle can be pressed on the load-bearing end of the booster arm 222, thereby realizing the transmission of force.

[0084] Optionally, the boost bracket 220 includes a first part and a second part connected to each other, the load-bearing end of the boost arm 222 is arranged at the first part, the connection end of the boost arm 222 is arranged at the second part, the first part is bent relative to the second part, and optionally, the angle between the first part and the second part can be an obtuse angle, thereby reducing the space occupied by the boost bracket 220 and avoiding interference with other structures during the rotation of the boost bracket 220. Further optionally, the connection between the first part and the second part is a second connection 223, and the second connection 223 can be hinged to the main body 110 of the chassis 100 through a third connection shaft 920, so that the boost bracket 220 can rotate around the hinge shaft.

[0085] In the above-mentioned embodiment 1 and embodiment 2, optionally, the booster bracket 220 has a load-bearing end, and the transport vehicle further includes a first connecting shaft 500 and a roller group 600, the roller group 600 is sleeved on the first connecting shaft 500, and the first connecting shaft 500 is arranged at the load-bearing end of the booster bracket 220. When the transport vehicle has a load 990, the roller group 600 can move relative to the load 990, thereby reducing the friction of the load-bearing end, which is conducive to improving the rotation flexibility of the booster bracket 220. Optionally, the first connecting shaft 500 can be a fastener such as a screw, which is not specifically limited here. Further optionally, the transport vehicle can also include a nut 901, a portion of the first connecting shaft 500 is threaded, and the nut 901 is threadedly matched with the first connecting shaft 500 to improve the connection stability of the first connecting shaft 500.

[0086] Embodiment 3

[0087] refer to Figures 12 to 16As shown, the same contents as those in Embodiment 1 and Embodiment 2 are not repeated here, except that: the driving bracket 210 is slidably connected to the chassis 100. Optionally, the driving bracket 210 may be provided with a guide groove, and the chassis 100 may be provided with a guide rail, or the driving bracket 210 may be provided with a guide rail, and the chassis 100 may be provided with a guide groove, and the guide rail and the guide groove are slidably matched, thereby improving the sliding stability of the driving bracket 210; further optionally, the transport vehicle also includes a first sliding member 970, and the first sliding member 970 may include a guide rail and a guide groove, and the driving bracket 210 is slidably connected to the chassis 100 through the guide rail and the guide groove, that is, an additional sliding connecting member is added between the driving bracket 210 and the chassis 100 to facilitate the setting of the guide rail and the guide groove, thereby facilitating the sliding connection of the driving bracket 210 and the chassis 100. The boost bracket 220 is slidably connected to the chassis 100. Optionally, the boost bracket 220 may be provided with a guide groove, and the chassis 100 may be provided with a guide rail, or the boost bracket 220 may be provided with a guide rail, and the chassis 100 may be provided with a guide groove, and the guide rail and the guide groove are slidably matched, thereby improving the sliding stability of the boost bracket 220; further optionally, the transport vehicle also includes a second sliding member 980, and the second sliding member 980 may include a guide rail and a guide groove, and the boost bracket 220 is slidably connected to the chassis 100 through the guide rail and the guide groove, that is, an additional sliding connection member is added between the boost bracket 220 and the chassis 100 to facilitate the setting of the guide rail and the guide groove, thereby facilitating the sliding connection of the boost bracket 220 and the chassis 100. When the weight of the load 990 on the transport vehicle is greater than a preset value, the booster bracket 220 slides in the first direction relative to the chassis 100, so as to drive the driving bracket 210 to slide in the first direction relative to the chassis 100 through the first elastic member 240, that is, the sliding directions of the booster bracket 220 and the driving bracket 210 are the same. In this way, the connection area between the driving bracket 210 and the chassis 100 and the connection area between the booster bracket 220 and the chassis 100 are both large, which is conducive to improving the stability of the entire floating drive device 200 during the sliding of the booster bracket 220 relative to the chassis 100 and the driving bracket 210 relative to the chassis 100.

[0088] In an optional embodiment, there is a receiving space between the driving bracket 210 and the boosting bracket 220, and the second elastic member 230 and the first elastic member 240 are both arranged in the receiving space, so that the various structures of the floating driving device 200 are more compact, thereby improving the space utilization rate of the floating driving device 200. Optionally, the number of the second elastic member 230 and the first elastic member 240 can both be one, in which case the second elastic member 230 and the first elastic member 240 need to be arranged in the middle part of the driving bracket 210 and the boosting bracket 220, so as to avoid the driving bracket 210 and the boosting bracket 220 from tilting during the sliding process, but in this case, the second elastic member 230 and the first elastic member 240 are easy to interfere with the driving wheel 250. Therefore, in another optional embodiment, the number of the second elastic members 230 and the first elastic members 240 are both at least two, and in the traveling direction of the transport vehicle, the second elastic members 230 are respectively arranged on both sides of the driving wheel 250, that is, the second elastic members 230 are arranged at intervals along the traveling direction of the driving wheel 250, and are distributed on the front and rear sides of the driving wheel 250, and the first elastic members 240 are respectively arranged on both sides of the driving wheel 250, that is, the first elastic members 240 are arranged at intervals along the traveling direction of the driving wheel 250, and are distributed on the front and rear sides of the driving wheel 250, thereby avoiding the driving bracket 210 and the boost bracket 220 from tilting during the sliding process, and the second elastic members 230 and the first elastic members 240 can be flexibly arranged to reduce the difficulty of setting.

[0089] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A transport vehicle, characterized in that: It comprises a chassis (100), a second elastic member (230) and a floating drive device (200), wherein: The floating drive device (200) comprises a drive bracket (210), a boost bracket (220), a first elastic member (240) and a drive wheel (250); the drive bracket (210) is hinged to the chassis (100); the boost bracket (220) is hinged to the chassis (100); the drive wheel (250) is arranged on the drive bracket (210); the first elastic member (240) is connected between the drive bracket (210) and the boost bracket (220); the second elastic member (230) is connected between the drive bracket (210) and the chassis (100); When the weight of the load (990) on the transport vehicle is greater than a preset value, the booster bracket (220) rotates relative to the chassis (100) to drive the drive bracket (210) to rotate relative to the chassis (100) via the first elastic member (240) to press the drive wheel (250); When the transport vehicle is in an unloaded state, the second elastic member (230) drives the driving bracket (210) to rotate relative to the chassis (100) to press the driving wheel (250).

2. The transport vehicle according to claim 1, characterized in that: The driving bracket (210) is hingedly connected to the chassis (100) via a second connecting shaft (910), and the driving bracket (210) comprises a driving wheel connecting portion (212) and an elastic member connecting portion (213), wherein the driving wheel connecting portion (212) and the elastic member connecting portion (213) are respectively located on two sides of the second connecting shaft (910). The driving wheel connecting portion (212) has a first end and a second end which are arranged opposite to each other along the extension direction of the second connecting shaft (910); the driving wheel (250) is connected to the first end of the driving wheel connecting portion (212); and the driving wheel (250) and the driving wheel connecting portion (212) are arranged along the extension direction of the second connecting shaft (910). The elastic member connecting portion (213) is connected to the first elastic member (240), the boost bracket (220) is located on a side of the elastic member connecting portion (213) away from the driving wheel connecting portion (212), and the second elastic member (230) is located between the first elastic member (240) and the second connecting shaft (910).

3. The transport vehicle according to claim 2, characterized in that: The chassis (100) comprises a main body (110) and a protective cover (120), wherein the protective cover (120) is arranged on the main body (110), and the transport vehicle further comprises a caster (300), wherein the caster (300) is arranged on the main body (110), and at least a portion of the caster (300) is located in a receiving space of the protective cover (120). The boost bracket (220) comprises a second base (221) and a boost arm (222); the second base (221) is arranged on the protective cover (120); the boost arm (222) is hinged to the second base (221); the boost arm (222) has a bearing end and a connecting end; the first elastic member (240) is connected between the elastic member connecting portion (213) and the connecting end of the boost arm (222).

4. The transport vehicle according to claim 1, characterized in that: The driving bracket (210) is hingedly connected to the chassis (100) via a second connecting shaft (910), and the driving bracket (210) comprises a driving wheel connecting portion (212) and an elastic member connecting portion (213), wherein the driving wheel connecting portion (212) and the elastic member connecting portion (213) are respectively located on two sides of the second connecting shaft (910). The driving wheel connecting portion (212) has a first end and a second end which are arranged opposite to each other along the extension direction of the second connecting shaft (910); the driving wheel (250) is connected to the first end of the driving wheel connecting portion (212); and the driving wheel (250) and the driving wheel connecting portion (212) are arranged along the extension direction of the second connecting shaft (910). The elastic member connecting portion (213) is connected to the first elastic member (240), at least a portion of the boost bracket (220) is located between the drive wheel connecting portion (212) and the elastic member connecting portion (213), and the second elastic member (230) is located on a side of the first elastic member (240) facing away from the drive wheel connecting portion (212).

5. The transport vehicle according to claim 4, characterized in that: The chassis (100) comprises a main body (110) and a protective cover (120), wherein the protective cover (120) is arranged on the main body (110), and the transport vehicle further comprises a caster (300), wherein the caster (300) is arranged on the main body (110), and at least a portion of the caster (300) is located in a receiving space of the protective cover (120). The transport vehicle further comprises a first base (400), the first base (400) being arranged on the protective cover (120), and the second elastic member (230) being connected between the first base (400) and the elastic member connecting portion (213).

6. The transport vehicle according to claim 3, characterized in that: The boost arm (222) has a bearing end and a connecting end, the driving bracket (210) is provided with a first avoidance hole, the boost bracket (220) is inserted into the first avoidance hole, and both the bearing end and the connecting end of the boost bracket (220) extend outside the first avoidance hole.

7. The transport vehicle according to any one of claims 1 to 6, characterized in that: The booster bracket (220) has a load-bearing end, and the transport vehicle further comprises a first connecting shaft (500) and a roller group (600), wherein the roller group (600) is sleeved on the first connecting shaft (500), and the first connecting shaft (500) is arranged at the load-bearing end of the booster bracket (220).

8. The transport vehicle according to claim 1, characterized in that: The booster bracket (220) has a load-bearing end, and the transport vehicle further comprises a top plate (700) and a plurality of support columns (800), wherein the top plate (700) is connected to the chassis (100) via the support columns (800), and the plurality of support columns (800) are arranged between the chassis (100) and the top plate (700). The top plate (700) is provided with a second avoidance hole (710), and the load-bearing end of the booster bracket (220) is exposed in the second avoidance hole (710); or, The top plate (700) is movably connected to the bottom plate (100) via at least one of the support columns (800), and the bottom surface of the top plate (700) contacts the bearing end of the booster bracket (220) to press the bearing end of the booster bracket (220).

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