A front-drive structure

Abstract

This utility model discloses a front-drive structure that is installed in conjunction with a vehicle body. The drive structure includes a drive wheel and a road wheel assembly adjacent to the drive wheel. A shock absorber is provided between the road wheel assembly and the vehicle body, and a limiting arm is provided between the road wheel assembly and the drive wheel to allow the road wheel assembly to swing along the axis of the drive wheel. This application improves the structure of the road wheel assembly adjacent to the drive wheel by changing the conventional method of swinging the road wheel assembly along the vehicle body to a method of swinging along the drive wheel. The limiting arm limits the distance between the road wheel assembly and the drive wheel. When the road wheel assembly encounters an obstacle, it can only swing along the center of the drive wheel under the action of the limiting arm, ensuring that the distance between the center of the drive wheel and the center of the road wheel assembly remains unchanged, thus avoiding various problems caused by the reduction of the ground contact length during track movement.

Description

Technical Field

[0001] This utility model relates to the field of track drive mechanism technology, and in particular to a front-drive structure. Background Technology

[0002] Tracked drive systems mainly consist of a drive mechanism, track chains (or track pads), load-bearing wheel sets (or road wheel sets), guide wheel sets, tensioning mechanisms, etc. These components work together to achieve power transmission between the tracks and the ground, enabling the movement of equipment or vehicles. Tracked drive systems are widely used in scenarios that require adapting to complex terrain, improving stability, and increasing load-bearing capacity.

[0003] In the prior art, as shown in the patent application number CN201910542914.3 entitled "A Shock-absorbing Walking Mechanism for a Firefighting Robot", the drive mechanism mainly includes an engine or motor and a drive wheel. The power of the motor is transmitted to the drive wheel through a gearbox, transmission shaft, etc. When the drive wheel meshes with the track, the drive wheel rotates and drives the closed track chain (made of metal track plates or rubber track rings) to circulate through meshing or friction to achieve the rolling of the track.

[0004] Drive wheels and guide wheel sets (or tension wheel sets) are typically located at the front and rear ends of the track. Multiple road wheel sets are also installed between the drive wheels and guide wheel sets to ensure the proper functioning of the track system. In this field, the distance between the center of the drive wheel and the center of the adjacent road wheel set (assuming it's the first road wheel set) is usually an overhead distance, and the distance between the center of the first road wheel set and the center of the last road wheel set is usually a ground contact distance. When the vehicle is moving and the track contacts an obstacle on the ground, the first road wheel set swings away from the drive wheel. At this time, the last road wheel set has not yet encountered an obstacle, resulting in a shorter ground contact distance. This increases vehicle vibration, reducing ride comfort and accelerating fatigue wear on track links, pins, load wheel bearings, and other components, shortening the service life of the track drive system and increasing maintenance frequency. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a front-drive structure that improves the structure of the road wheel assembly adjacent to the drive wheel. Instead of the conventional method of swinging the road wheel assembly along the vehicle body, it swings along the drive wheel. A limiting arm restricts the distance between the road wheel assembly and the drive wheel. When the road wheel assembly encounters an obstacle, it can only swing along the center of the drive wheel under the action of the limiting arm, ensuring that the distance between the center of the drive wheel and the center of the road wheel assembly remains constant, thus avoiding various problems caused by the reduction of the ground contact length during track movement.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a front-drive structure, which is installed in conjunction with the vehicle body. The drive structure includes a drive wheel and a load-bearing wheel assembly arranged adjacent to the drive wheel. A shock absorber is provided between the load-bearing wheel assembly and the vehicle body, and a limiting arm is provided between the load-bearing wheel assembly and the drive wheel to allow the load-bearing wheel assembly to swing along the axis of the drive wheel.

[0007] Compared with the prior art, the present invention has the following beneficial effects:

[0008] Understandably, the drive structure connects to the vehicle body (or equipment) to work with components such as tracks and guide wheels to form a tracked drive system for propulsion. Correspondingly, the drive wheels of the drive structure, along with their motors, gearboxes, and other components, are installed in conjunction with the vehicle body to ensure that the drive wheels can rotate under the action of the motor (or other driver) to drive the tracks.

[0009] The structure of the road wheel assembly is similar to that of existing road wheel assemblies, mainly consisting of two rolling wheels connected by an axle. A shock absorber (spring shock absorber) is installed between the road wheel assembly and the vehicle body. The difference is that in the prior art, the road wheel assembly is hinged to the vehicle body regardless of whether it is tilting backward or forward to ensure that each road wheel assembly rotates along the vehicle body during use. However, in this application, the road wheel assembly adjacent to the drive wheel is connected to the drive wheel through a limiting arm, so that the load rotates along the drive wheel during use. Due to the existence of the limiting arm, the distance between the center of the road wheel assembly and the center of the drive wheel is limited to a constant (basically equivalent to the length of the limiting arm). Therefore, no matter the size of the obstacle encountered or the position to which the road wheel assembly swings, the suspension distance is constant and will not change with the size of the obstacle. This ensures that the entire drive system has sufficient ground contact distance and guarantees the various performance characteristics of the entire drive system.

[0010] Furthermore, the limiting arm is located on one side of the drive wheel, coaxially connected to the drive wheel and rotatably connected, and the limiting arm is connected to the load wheel assembly.

[0011] Furthermore, the load-bearing wheel assembly includes two load-bearing wheels arranged side by side and a load-bearing axle coaxially arranged with the two load-bearing wheels, the load-bearing axle being connected to the limiting arm.

[0012] Furthermore, the drive wheel is also equipped with a noise reduction auxiliary component, which includes at least one disc.

[0013] The disc is located on one side of the drive wheel and is fixedly connected to the drive wheel so that the disc has an annular support platform coaxial with the drive wheel, wherein the limiting arm is located on the outside of the disc and is rotatably connected to the disc.

[0014] Furthermore, at least one support portion is provided on the connection side between the drive wheel and the disc, and the disc is inserted into the support portion and connected to the drive wheel through multiple connectors;

[0015] The support and multiple connectors are arranged in a ring around the drive wheel, and the support and multiple connectors are distributed adjacent to each other along the diameter direction of the drive wheel.

[0016] Furthermore, the support portion is a protruding structure extending outward along the drive wheel connection side, or

[0017] The support part is a recessed structure that is recessed inward along the connection side of the drive wheel.

[0018] Furthermore, the annular support platform and the drive wheel are spaced apart and form an annular clearance groove.

[0019] Furthermore, multiple connectors are located between the annular clearance groove and the support.

[0020] Furthermore, the disc has a hollow, conical truncated structure with a constriction facing the drive wheel, and the circumferential sidewall of the disc is provided with multiple weight-reducing grooves.

[0021] Furthermore, the limiting arm has a Y-shaped frame structure, with a plug section and a connecting section. The plug section is inserted into the drive wheel along both sides and is rotatably connected to the drive wheel. The connecting section is connected to the load wheel assembly. Attached Figure Description

[0022] Figure 1 This is a diagram showing the positional relationship of the front-drive structure of this utility model in a tracked drive system;

[0023] Figure 2 This is a schematic diagram of a structure in which the front-mounted drive mechanism cooperates with the vehicle body and the driver in this utility model.

[0024] Figure 3 This is a schematic diagram of the structure of this utility model;

[0025] Figure 4 for Figure 3 A structural diagram from another perspective;

[0026] Figure 5 This is a schematic diagram of an exploded structure of the present invention;

[0027] Figure 6 This is a connection structure diagram of the limiting arm, load-bearing shaft, and shock absorber in this utility model;

[0028] Figure 7 for Figure 6 A structural diagram from another perspective;

[0029] Figure 8 This is a schematic diagram of one structure of the limiting arm in this utility model;

[0030] Figure 9This is a schematic diagram of a structure in which the drive wheel, disc, and track are coordinated.

[0031] Figure 10 This is an exploded structural diagram of the drive wheel and disc in this utility model;

[0032] Figure 11 This is a schematic diagram of one structure of the drive wheel and disc in this utility model;

[0033] Figure 12 This is a schematic diagram of one structure of the drive wheel in this utility model;

[0034] Figure 13 This is a schematic diagram of one structure of the disc in this utility model;

[0035] Figure 14 These are schematic diagrams of four different structures of the support portion in this utility model;

[0036] Figure 15 In this utility model and Figure 14 Schematic diagrams of four types of disc structures that coordinate with the supporting parts of the various components.

[0037] In the diagram: Load wheel assembly 600, load-bearing wheel assembly 500, shock absorber 510, limiting arm 520, insertion section 522, irregular arm 5221, ring connecting part 5222, extension section 5223, fixing section 5224, connecting section 521, shock-absorbing fixing block 530, load-bearing wheel 542, load-bearing shaft 541, tensioning assembly 300, drive wheel structure 200, drive wheel 220, support part 221, protrusion structure 2213, locking protrusion. 2211, recessed groove; 2214, groove; 2212, disc; 210, annular support platform; 211, connecting plate; 213, auxiliary support structure; 2123, slot; 2121, insert ring; 2124, insert block; 2122, weight reduction through groove; 212, annular clearance groove; 230, connector; 240, connecting screw hole; 241, track; 100, auxiliary toothed ring; 110, body; 400, slide groove; 410, motor; 420, reducer; 430. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0039] like Figure 1-8 As shown, a front-drive structure is a component of the track 100 drive mechanism and is installed in conjunction with the vehicle body 400 (or equipment), such as... Figure 1 , 2As shown, a track 100 drive mechanism structure equipped with the front drive structure of this application is shown. The track 100 drive mechanism structure is similar to the existing track 100 drive mechanism, both including a drive structure, multiple load wheel sets 600 and tensioning assembly 300. The tensioning assembly 300 has a guiding function. Track 100 drive mechanisms are provided on both sides of the vehicle body 400. The two track 100 drive mechanisms cooperate with each other to realize the movement of the entire vehicle body 400.

[0040] This application improves the existing drive structure to increase the operational stability of the track 100 drive mechanism. Specifically, the drive structure includes a drive wheel 220 and a load wheel assembly 500 (which is the load wheel assembly 600 in the prior art, but the name is slightly different for ease of distinction) arranged adjacent to the drive wheel 220. A shock absorber 510 is provided between the load wheel assembly 500 and the vehicle body 400, and a limiting arm 520 is provided between the load wheel assembly 500 and the drive wheel 220 to allow the load wheel assembly 500 to swing along the axis of the drive wheel 220.

[0041] Understandably, the drive wheel 220 of the drive structure needs to be driven by a driver, which is a motor 420 (servo motor 420, stepper motor 420, or other electronically controlled motor 420), connected to the drive wheel 220 via a reducer 43 and a drive shaft. The driver is fixed to the vehicle body 400. The reducer 43 can be located inside or outside the vehicle body 400 and is connected to the motor 420. The drive shaft is coaxially fixed to the output shaft of the reducer 43 and connected to the drive wheel 220. The track 100 meshes with the drive wheel 220, and the drive wheel 220 rotates under the action of the motor 420 (or other driver), driving the track 100 to roll. The shock absorber 510, connected to the road wheel assembly 500 and the vehicle body 400, is connected to a shock-absorbing fixing block 530 on the vehicle body 400. The shock-absorbing fixing block 530 can be slidably set and fixedly connected to the groove 410 on the vehicle body 400 to ensure that the shock absorber 510 achieves optimal performance.

[0042] The structure of the road wheel assembly 500 is similar to that of existing road wheel assemblies 500, mainly consisting of two rolling wheels connected by an axle. A shock absorber 510 (spring shock absorber 510) is provided between the road wheel assembly 500 and the vehicle body 400. The difference is that in the prior art, the road wheel assembly 500 is hinged to the vehicle body 400 regardless of whether it is tilting backward or forward to ensure that each road wheel assembly 500 rotates along the vehicle body 400 during use; while in this application, the road wheel assembly 500 adjacent to the drive wheel 220 is connected by a limiting arm 52. The load is connected to the drive wheel 220, allowing the load to rotate along the drive wheel 220 during use. Due to the presence of the limiting arm 520, the distance between the center of the load wheel assembly 500 and the center of the drive wheel 220 is essentially constant (equivalent to the length of the limiting arm 520). Therefore, regardless of the size of the obstacle encountered or the position to which the load wheel assembly 500 swings, the suspension distance remains constant and will not change with the size of the obstacle. This ensures that the entire drive system has sufficient grounding distance and guarantees the various performance characteristics of the entire drive system.

[0043] When the drive wheel 220 and the load-bearing wheel assembly 500 are installed, they are arranged with their axes parallel. Therefore, in order for the load-bearing wheel assembly 500 to swing along the drive wheel 220, the limiting arm 520 needs to be set on both sides of the drive wheel 220 and rotatably connected to it. This ensures that the rotation of the drive wheel 220 is not affected, and the swing of the load-bearing wheel assembly 500 along the drive wheel 220 is also unaffected. Therefore, in this application, the limiting arm 520 is located on one side of the drive wheel 220, coaxially set and rotatably connected to the drive wheel 220. If the limiting arm 520 is a common rod-shaped structure, and considering that the drive wheel 220 has two sides, under normal circumstances, only one limiting arm 520 is needed to achieve the swing of the load-bearing wheel assembly 500 along the drive wheel 220. To increase the stability of the load-bearing wheel assembly 500, when using a rod-shaped limiting arm 520, a limiting arm 520 can be connected to both the inner and outer sides of the drive wheel 220. The two limiting arms 520 are connected to the drive wheel 220 and the load-bearing wheel assembly 500 respectively by rotational clamping, so as to ensure that the load-bearing wheel assembly 500 swings along the drive wheel 220.

[0044] In this application, the structure of the limiting arm 520 is designed in conjunction with the mechanism of the drive wheel 220 and the load-bearing wheel assembly 500, such as... Figure 8As shown, specifically, the limiting arm 520 has a Y-shaped frame structure. The limiting arm 520 has a socket section 522 and a connecting section 521. The socket section 522 is inserted into the drive wheel 220 along both sides of the drive wheel 220 and is rotatably connected to the drive wheel 220. The connecting section 521 is connected to the load wheel assembly 500. The socket section 522 of the limiting arm 520 has two irregular arms 5221. The two irregular arms 5221 are detachably connected to the connecting section 521 to form the socket section 522. The structure of each irregular arm 5221 has a ring connecting part 5222 adapted to the installation of the drive wheel 220, an extension section 5223 that avoids the disc 210, and a fixing section 5224 for connecting with the connecting section 521. The ring connecting part 5222 is rotatably connected to the shaft connection structure in the middle of the drive wheel 220 through a bearing. Based on this irregular structure, it is adapted to the assembly structure of the drive wheel 220 and the disc 210 of this application. At the same time, the detachable connection of the plug section and the connecting section 521 can facilitate the overall production of the limit arm 520 and the assembly of each component.

[0045] To facilitate the connection between the limiting arm 520 and the load-bearing wheel assembly 500, the load-bearing wheel assembly 500 of this application includes two load-bearing wheels 542 arranged side by side and a load-bearing shaft 541 coaxially arranged with the two load-bearing wheels 542. The two load-bearing wheels 542 are located at both ends of the load-bearing shaft 541 and are rotatably connected to the load-bearing shaft 541 via bearings. The load-bearing shaft 541 is fixedly connected to the limiting arm 520. One end of the shock absorber 510 can be connected to either the load-bearing shaft 541 or the limiting arm 520, such as... Figure 2-7 As shown in this application, the lower end of the shock absorber 510 is hinged to the connecting section 521, and the upper end of the shock absorber 510 is hinged to the connecting seat on the vehicle body 400. The connecting seat is slidably connected to the vehicle body 400 and locked with bolts, which can be used to adjust the pressure of the shock absorber 510 to ensure that the shock absorber 510 is adapted to the entire track 100 drive mechanism.

[0046] In the prior art, the drive wheel 220 of the gear structure can only mesh with the track 100 simply. However, the drive wheel 220 basically mates with the middle of the annular structure of the track 100 (the width of the track 100 is greater than the thickness of the drive wheel 220). Since the drive wheel 220 is usually located in front of or behind the drive mechanism of the track 100, during the meshing process between the track 100 and the drive wheel 220, the rolling of the track 100 has an impact effect on the drive wheel 220 (due to the lack of support on the annular edge of the track 100). Therefore, noise and vibration are easily generated between the rotation of the drive wheel 220 and the track 100.

[0047] To address the aforementioned issues, the drive wheel 220 of this application is further provided with a noise reduction auxiliary component, which includes at least one disc 210. The drive wheel 220 and the two discs 210 constitute a drive wheel structure 200, which has a noise reduction function. To facilitate the installation of the discs 210 and the drive wheel 220, the disc 210 of this application is located on one side of the drive wheel 220 and connected to the drive wheel 220, so that the disc 210 has an annular support platform 211 coaxially arranged with the drive wheel 220; at least one support portion 221 is provided on the connection side between the drive wheel 220 and the disc 210, and the disc 210 is inserted into the support portion 221 and connected to the drive wheel 220 through multiple connectors 240; the support portion 221 and the multiple connectors 240 are respectively arranged in a ring along the drive wheel 220, and the support portion 221 and the multiple connectors 240 are distributed adjacently along the diameter direction of the drive wheel 220.

[0048] Understandably, the track 100 has various structures. Based on the structure of the track 100, the disc 210 and the drive wheel 220 can have various combinations. For example, when the track 100 has the structure described in the existing patent CN201510288339.0, the drive wheel is originally adapted to the track 100 of this structure. The drive wheel 220 is a columnar structure with a hollow cylinder. Multiple openings are made on the side wall of the hollow cylindrical structure, and the openings can cooperate with this type of track 100. Correspondingly, the disc 210 adopts a columnar structure. The disc 210 is attached to the drive wheel 220. Then, the circumference of the columnar disc 210 is the annular support platform 211, and the circular radius of the annular support platform 211 is larger than the cylindrical radius of the drive wheel 220 to ensure that the annular support platform 211 can support the annular edge of the track 100, and the drive wheel 220 can cooperate with the drive teeth in the middle of the track 100. Of course, the track 100 can also adopt the structure described in the existing patent CN201680068390.3. In this case, the drive wheel 220 is similar to a gear structure, and the annular center of this type of track 100 also has two auxiliary toothed rings 110 spaced apart. When the disc 210 and the drive wheel 220 cooperate, they need to avoid the auxiliary toothed rings 110. Therefore, the structure of the disc 210 is such that the outer side is higher than the inner side, and there is at least a clearance space. Correspondingly, the annular support platform 211 is the structure where the outer side of the disc 210 is located. The overall structure of the disc 210 can be trumpet-shaped, stepped cylindrical, etc., as long as it can support the annular edge of the track 100 on the outside, and the annular support platform 211 and the drive wheel 220 form a clearance space, without affecting the use of the auxiliary toothed rings 110.

[0049] It can be seen that regardless of the structure of the track 100, the combination of the drive wheel 220 and the disc 210 can be adapted to the track 100 with the corresponding structure, so that the drive wheel 220 can drive the track 100 to rotate. As long as the annular support platform 211 of the disc 210 can support the annular edge of the track 100, the disc 210 can rotate synchronously when the drive wheel 220 rotates. Moreover, the radius of the annular support platform 211 is adapted to the annular edge structure of the track 100, ensuring that during the engagement of the drive wheel 220 and the track 100, the annular support platform 211 can connect with the edge of the track 100 to support the edge of the track 100, thus achieving the purpose of silent driving.

[0050] like Figure 9-13 As shown, in this application, the track 100 has the structure described in the prior art patent CN201680068390.3. Correspondingly, the drive wheel 220 is similar to a gear structure, and the disc 210 is a hollow truncated cone structure with a constriction facing the drive wheel 220. The truncated cone can be a square pyramid, a truncated cone, or a combination thereof, as long as the circumferential sidewall adjacent to the large end of the disc 210 has a circular support platform 211 structure. In this application, as... Figure 10 , 11 As shown, the disc 210 is a hollow truncated cone structure. The small end of the disc 210 has an outwardly extending annular connecting plate 213. The connecting plate 213 is connected to the drive wheel 220. After the disc 210 is connected to the drive wheel 220, the annular support platform 211 and the drive wheel 220 are spaced apart and form an annular clearance groove 230. The annular clearance groove 230 is used for the movement of each tooth structure on the auxiliary tooth ring 110 on the track 100.

[0051] Since the drive wheel 220 mainly mates with the annular center of the track 100, therefore, as Figure 9 , 10 As shown in Figure 11, in this application, a disc 210 is provided on each side of the drive wheel 220, which can support the two annular edges of the track 100, further ensuring the silent driving effect.

[0052] To ensure that the support portion 221 provides support to the disk 210 along the diameter of the drive wheel 220, there can be one or more support portions 221, distributed along the diameter of the drive wheel 220. The support portion 221 can be a structure formed by multiple support plates arranged in a ring (the support plates can be simple straight plates, curved plates, etc.), a ring-shaped enclosure structure, or a ring-shaped groove 2212 structure. When the disk 210 is inserted into the support portion 221, the connection point between the disk 210 and the drive wheel 220 must have a recessed or protruding structure adapted to the support portion 221 to achieve the insertion of the disk 210 into the support portion 221. The annular support platform 211 is located near the periphery of the drive wheel 220. Since the compressive force on the disc 210 is directed towards the inside of the drive wheel 220, the support 221 and multiple connectors 240 are arranged along the diameter of the drive wheel 220. This allows the support 221 to provide additional support force at the connection point between the support 221 and the disc 210, in addition to the force exerted by the multiple connectors 240 (bolts, etc.). This counteracts the downward pressure on the disc 210 during use, thereby increasing the connection stability between the disc 210 and the drive wheel 220 and extending the service life of the overall drive wheel structure.

[0053] In some embodiments of this application, when the overall thickness of the drive wheel 220 is relatively thin, the support portion 221 can adopt a protruding structure that protrudes outward along the connecting side of the drive wheel 220. The protruding structure can be a circular protruding structure, a square protruding structure, or multiple plate-shaped protruding structures, etc. Then, as long as the disc 210 has a snap-fit ​​structure that cooperates with the outer side of the protruding structure, the support portion 221 can provide support force along the force direction of the disc 210, offset the force on each connecting member 240, increase the connection strength between the disc 210 and the drive wheel 220, and improve the overall service life of the drive wheel structure 200.

[0054] Specifically, when the support 221 is a protruding structure extending along the drive wheel 220, such as... Figure 14 As shown in (1) and (3), the support 221 can also be a ring-shaped protrusion structure 2213 or multiple protrusions 2211 arranged in a ring. The protrusion structure 2213 can be a circular, square or other ring-shaped structure; each protrusion 2211 can be a common straight plate structure, an arc-shaped plate structure, etc. Similarly, the ring structure surrounded by each protrusion 2211 can also be a circular or square ring.

[0055] In accordance with the structure of the support part 221 described above, in order for the disk 210 to be inserted into the support part 221, as follows: Figure 15 As shown in (1) and (3), the disk 210 has at least an annular auxiliary support structure 2123 sleeved on the outside of the protrusion structure 2213, or the disk 210 has multiple slots 2121 for inserting each protrusion 2211.

[0056] When the support part 221 is an annular protrusion structure 2213, the auxiliary support structure 2123 cooperates with the protrusion structure 2213. The auxiliary support structure 2123 can be an annular groove structure opened on the connecting plate 213, and the annular groove structure is engaged with the outside of the protrusion structure 2213. Alternatively, the auxiliary support structure 2123 can be an annular hole structure, which is the inner side of the connecting plate 213. In this case, the annular hole structure fits perfectly on the outside of the protrusion structure 2213. Therefore, when the auxiliary support structure 2123 cooperates with the protrusion structure 2213, it can also provide support along the force direction of the disk 210 to provide additional support force to counteract the downward pressure on the disk 210 during use, thereby increasing the connection stability between the disk 210 and the drive wheel 220 and increasing the service life of the overall drive wheel structure.

[0057] When the support portion 221 has multiple latching protrusions 2211, each latching groove 2121 is formed on the connecting plate 213, and its distribution structure is the same as that of each latching protrusion 2211, ensuring that each latching groove 2121 can be engaged with each latching protrusion 2211. Alternatively, the latching groove 2121 can also be a latching block provided on the connecting plate 213, with the latching blocks connected along the inner or outer side of the connecting plate 213. The latching groove 2121 can be a through groove structure or a blind groove structure.

[0058] like Figure 10-13 As shown, in one embodiment of this application, the protrusion structure 2213 is a circular ring structure, the connecting plate 213 is a circular annular plate structure, the connecting plate 213 is sleeved on the outside of the protrusion structure 2213, and the inner sidewall structure of the connecting plate 213 is equivalent to the auxiliary support structure 2123.

[0059] In some embodiments of this application, when the thickness of the drive wheel 220 is sufficiently large, the support portion 221 can also be a recessed structure that is recessed inward along the connection side of the drive wheel 220. Similarly, the recessed structure can be an annular groove structure or a recessed structure formed by multiple groove structures. The disc 210 is provided with a plug-in structure that can be inserted into the recessed structure, so that after the disc 210 and the support portion 221 are connected, the support portion 221 provides support along the force direction of the disc 210, providing additional support force to counteract the downward pressure on the disc 210 during use, thereby increasing the connection stability between the disc 210 and the drive wheel 220 and increasing the service life of the overall drive wheel structure.

[0060] Based on the structural design of the protruding support portion 221, the recessed support portion 221 can also have a similar structure, such as... Figure 14 As shown in (2) and (4), the support portion 221 can be an annular recessed groove 2214 or a plurality of grooves 2212 arranged in a ring. Correspondingly, as Figure 15As shown in (1) and (3), when the disc 210 is engaged with the recessed groove 2214, the connecting plate 213 of the disc 210 is provided with a protruding insert ring 2124 that is inserted into the recessed groove 2214; when the disc 210 is engaged with each groove 2212, the disc 210 has multiple insert blocks 2122 for inserting into each groove 2212.

[0061] In some embodiments of this application, the connector 240 is a connecting bolt, which is used to connect the connecting plate 213 and the drive wheel 220. Multiple connectors 240 are arranged in a ring along the axis of the drive wheel 220, and are located between the annular clearance groove 230 and the support portion 221. Figure 10 , 11 As shown in Figures 12 and 13, multiple sets of connecting screw holes 241 are provided on the connecting side of the drive wheel 220 and the connecting plate 213 respectively. Each connecting bolt passes through the corresponding set of connecting screw holes 241 to realize the connection between the connecting plate 213 and the drive wheel 220.

[0062] To facilitate the connection of the connector 240 and further reduce the weight of the disk 210 and the energy consumption of the driver (drive motor) connected to the drive wheel 220, this application provides multiple weight-reducing slots 212 on the circumferential sidewall of the disk 210. The weight-reducing slots 212 facilitate the connector 240 to pass through the connecting plate 213 to connect the connecting plate 213 and the drive wheel 220, and also reduce the overall weight of the disk 210 by utilizing the hollow structure.

[0063] It is worth noting that the support portions 221 on both sides of the drive wheel 220 can adopt the same structure or a combination of different structures. The drive wheel 220 is made of steel or cast iron, and the disc 210 is made of aluminum alloy, plastic parts (engineering plastics), lightweight materials (light alloys), etc.

[0064] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0065] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0066] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A front drive structure, which is installed in cooperation with a vehicle body (400), characterized in that: The drive structure includes a drive wheel (220) and a load-bearing wheel assembly (500) arranged adjacent to the drive wheel (220). A shock absorber (510) is provided between the load-bearing wheel assembly (500) and the vehicle body (400), and a limiting arm (520) is provided between the load-bearing wheel assembly (500) and the drive wheel (220) to allow the load-bearing wheel assembly (500) to swing along the axis of the drive wheel (220).

2. The pre-driver structure of claim 1, wherein: The limiting arm (520) is located on one side of the drive wheel (220), coaxially connected to the drive wheel (220), and rotatably connected. The limiting arm (520) is connected to the load wheel assembly (500).

3. The pre-driver structure of claim 2, wherein: The load-bearing wheel assembly (500) includes two load-bearing wheels (542) arranged side by side and a load-bearing axle (541) coaxially arranged with the two load-bearing wheels (542). The load-bearing axle (541) is connected to the limiting arm (520).

4. The pre-driver structure of any one of claims 1-3, wherein: The drive wheel (220) is also provided with a noise reduction auxiliary component, which includes at least one disc (210). The disc (210) is located on one side of the drive wheel (220) and is fixedly connected to the drive wheel (220) so that the disc (210) has an annular support platform (211) coaxially arranged with the drive wheel (220), wherein the limiting arm (520) is located on the outside of the disc (210) and is rotatably connected to the disc (210).

5. The front-drive structure according to claim 4, characterized in that: At least one support (221) is provided on the connection side between the drive wheel (220) and the disc (210). The disc (210) is inserted into the support (221) and connected to the drive wheel (220) through multiple connectors (240). The support (221) and multiple connectors (240) are arranged in a ring along the drive wheel (220), and the support (221) and multiple connectors (240) are distributed adjacent to each other along the diameter direction of the drive wheel (220).

6. The pre-driver structure of claim 5, wherein: The support part (221) is a protruding structure that extends outward along the connection side of the drive wheel (220), or The support part (221) is a recessed structure that is recessed inward along the connection side of the drive wheel (220).

7. The pre-driver structure of claim 6, wherein: The annular support platform (211) and the drive wheel (220) are spaced apart and form an annular clearance groove (230).

8. The pre-driver structure of claim 7, wherein: Multiple connectors (240) are located between the annular clearance groove (230) and the support (221).

9. The pre-driver structure of claim 8, wherein: The disk (210) has a hollow truncated cone structure with a constriction facing the drive wheel (220), and the circumferential sidewall of the disk (210) is provided with multiple weight-reducing through grooves (212).

10. The pre-drive structure of claim 1, 2, 3, 5, 6, 7, 8, or 9, wherein: The limiting arm (520) has a Y-shaped frame structure. The limiting arm (520) has a plug section (522) and a connecting section (521). The plug section (522) is plugged into the drive wheel (220) along both sides of the drive wheel (220) and is rotatably connected to the drive wheel (220). The connecting section (521) is connected to the load wheel set (500).

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