Mobile chassis and mobile trolley for bearing power battery pack

Abstract

The utility model discloses a mobile chassis and a mobile trolley for bearing a power battery pack. The mobile chassis comprises a frame, an electric driving wheel integrated with a motor, a bearing connecting piece, a control handle and directional trundles, the frame comprises a bearing seat mounting bracket arranged at one end of the frame and a trundle mounting bracket arranged at the other end of the frame; a cylindrical shaft of the electric driving wheel is sleeved with the bearing connecting piece, and the side end of the bearing connecting piece is connected with a bearing seat mounting bracket of the frame; the top end of a cylindrical shaft of the electric driving wheel protrudes out of the top end of the bearing connecting piece in the axial direction of the cylindrical shaft, and the top end of the cylindrical shaft of the electric driving wheel is connected with the control handle. And the directional caster is connected with a caster mounting bracket of the frame. The motor is integrated in the electric driving wheel, and the electric driving wheel is connected with the frame through the bearing connecting piece, so that the bearing capacity of the movable chassis for bearing articles is improved, and the rotating capacity required by steering of the movable chassis is met.

Description

Technical Field

[0001] This application relates to the field of mobile charging vehicles, and specifically relates to a mobile chassis. This application also relates to a mobile trolley for carrying a power battery pack. Background Art

[0002] At present, the movement of a mobile charging vehicle is achieved through drive wheels, and most of the drive wheels are driven by electric motors. Mobile charging vehicles have different requirements for the mobile chassis due to different types of battery packs and usage scenarios.

[0003] In the prior art, the installation method of the electric motor used affects the height of the mobile chassis, and there are certain requirements for the bearing capacity of the mobile chassis and the rotational force during the movement. Summary of the Utility Model

[0004] This application provides a mobile chassis to solve the above technical problems. This application also provides a mobile trolley for carrying a power battery pack.

[0005] This application provides a mobile chassis, including: a frame, an electric drive wheel integrated with a motor, a bearing connecting member, a control handle, and a directional caster; the frame includes a bearing seat mounting bracket provided at one end of the frame and a caster mounting bracket provided at the other end of the frame; the cylindrical shaft of the electric drive wheel is sleeved with the bearing connecting member, and the side end of the bearing connecting member is connected to the bearing seat mounting bracket of the frame; the top end of the cylindrical shaft of the electric drive wheel protrudes from the top end of the bearing connecting member along the axial direction of the cylindrical shaft, and the top end of the cylindrical shaft of the electric drive wheel is connected to the control handle; the directional caster is connected to the caster mounting bracket of the frame.

[0006] Optionally, the bearing connecting member includes a deep groove ball bearing, a bearing seat, and a tapered roller bearing arranged coaxially in sequence, the deep groove ball bearing is arranged in a side hole of the bearing seat along one side of the bearing direction of the bearing seat, and the tapered roller bearing is arranged in a side hole of the bearing seat along the other side of the bearing direction of the bearing seat; the deep groove ball bearing, the bearing seat, and the tapered roller bearing of the bearing connecting member are arranged in sequence along the direction from the top end to the bottom end of the cylindrical shaft of the electric drive wheel.

[0007] Optionally, a first inner bolt hole is provided at the side end of the bearing seat of the bearing connecting member, a first through hole is provided on the bearing seat mounting bracket, and the side end of the bearing seat of the bearing connecting member is connected to the bearing seat mounting bracket through a first bolt.

[0008] Optionally, the bearing seat mounting bracket is provided at the central position of one end of the frame, the caster mounting brackets are provided at both sides of the other end of the frame, and the caster mounting brackets are coaxially arranged with the bearing seat mounting bracket.

[0009] Optionally, a second internal thread hole is provided at the top end of the cylindrical shaft of the electric drive wheel, a second through hole corresponding to the second internal thread hole is provided at the end of the control handle, and the top end of the electric drive wheel is connected to the control handle by a second bolt.

[0010] Optionally, it further includes: a power battery pack, and the power battery pack includes a power battery frame; the power battery frame of the power battery pack is connected to the vehicle body frame of the vehicle body by a third bolt.

[0011] Optionally, the fixed caster is provided with a caster mounting hole, the caster mounting bracket is provided with a back welding nut, and the caster mounting hole of the fixed caster is connected to the back welding nut of the caster mounting bracket by a fourth bolt.

[0012] Optionally, the vehicle body frame of the vehicle frame is a rectangular vehicle body frame composed of a plurality of longitudinal beams and cross beams; the vehicle body frame includes a caster mounting bracket area and a fixed support area formed by fixed support members, and the fixed support area is located between the bearing seat mounting bracket and the caster mounting bracket area; a forklift support bracket is further provided at the bottom end of the periphery of the vehicle body frame, and the forklift support bracket is a load-bearing point for carrying products on the vehicle body frame.

[0013] This application also provides a mobile cart for carrying a power battery pack, including: a mobile chassis and a power battery pack arranged on the mobile chassis; the mobile chassis adopts the mobile chassis described above.

[0014] Compared with the prior art, this application has the following advantages:

[0015] This application provides a mobile chassis, including: a vehicle frame, an electric drive wheel integrated with a motor, a bearing connecting piece, a control handle, and a fixed caster; the vehicle frame includes a bearing seat mounting bracket arranged at one end of the vehicle frame and a caster mounting bracket arranged at the other end of the vehicle frame; the cylindrical shaft of the electric drive wheel is sleeved with the bearing connecting piece, and the side end of the bearing connecting piece is connected to the bearing seat mounting bracket of the vehicle frame; the top end of the cylindrical shaft of the electric drive wheel protrudes from the top end of the bearing connecting piece along the axial direction of the cylindrical shaft, and the top end of the cylindrical shaft of the electric drive wheel is connected to the control handle; the fixed caster is connected to the caster mounting bracket of the vehicle frame.

[0016] The mobile chassis integrates the motor into the electric drive wheel. The electric drive wheel is connected to the bearing connecting piece, the side end of the bearing connecting piece is connected to the bearing seat mounting bracket of the vehicle frame, the top end of the cylindrical shaft of the electric drive wheel is connected to the control handle, and the swivel caster is connected to the caster mounting bracket of the vehicle frame. Since the motor is integrated into the electric drive wheel, the motor does not occupy the overall height of the mobile chassis. Moreover, the electric drive wheel and the vehicle frame are connected through the bearing connecting piece, which improves the load-bearing capacity of the mobile chassis for carrying items and the rotational ability required for the mobile chassis to turn. Description of the Drawings

[0017] Figure 1 Figure 1 is a schematic structural diagram of the mobile chassis provided by the first embodiment of the present application.

[0018] Figure 2 Figure 2 is an exploded view of the mobile chassis provided by the first embodiment of the present application.

[0019] Figure 3 Figure 3 is a schematic structural diagram of the vehicle frame provided by the first embodiment of the present application.

[0020] Figure 4 Figure 4 is a sectional view of the bearing connecting piece provided by the first embodiment of the present application.

[0021] Figure 5 Figure 5 is a schematic structural diagram of the mobile cart carrying the power battery pack provided by the second embodiment of the present application.

[0022] Figure 6 Figure 6 is an exploded view of the mobile cart carrying the power battery pack provided by the second embodiment of the present application.

[0023] Among them, electric drive wheel 1, cylindrical shaft 101 of the electric drive wheel, control handle 2, end 201 of the control handle, vehicle frame 3, fixed support frame 301, caster mounting bracket 302, bearing seat mounting bracket 303, forklift support bracket 304, first cross beam 305, second cross beam 306, first longitudinal beam 307, second longitudinal beam 308, third longitudinal beam 309, bearing connecting piece 4, bearing seat 401, side end side surface 401-1 of the bearing seat, side end top surface 401-2 of the bearing seat, deep groove ball bearing 402, tapered roller bearing 403, swivel caster 5, power battery pack 6. Detailed Embodiments

[0024] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0025] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0026] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0027] In the present application, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", "arranged", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0028] First Embodiment

[0029] The first embodiment of the present application provides a mobile chassis. Please refer to Figures 1 to 4 Understand the first embodiment of the present application. Figure 1 It is a schematic structural diagram of the mobile chassis provided by the first embodiment of the present application. Figure 2 It is an exploded view of the mobile chassis provided by the first embodiment of the present application. Figure 3 It is a schematic structural diagram of the frame provided by the first embodiment of the present application. Figure 4 It is a sectional view of the bearing connecting member provided by the first embodiment of the present application.

[0030] Combined with Figure 1 and Figure 2 It can be seen that the mobile chassis provided by the embodiment of the present application includes: an electric drive wheel 1 integrated with a motor, a control handle 2, a frame 3, a bearing connecting member 4, and a swivel caster 5.

[0031] Among them, in order to reduce the overall height of the frame in the mobile chassis and increase the height of the area where the frame carries items, the embodiment of the present application uses an electric drive wheel 1 integrated with a motor, integrating the motor into the electric drive wheel, so as to avoid setting the motor separately under the frame and affecting the height of the frame. Moreover, in order to save costs and cancel the power steering, the embodiment of the present application connects the electric drive wheel and the frame with a bearing connecting piece, and the bearing connecting piece can meet the bearing capacity required after the frame carries items and the rotation ability required for steering.

[0032] Specifically, the connection relationships between the various components in the mobile chassis are described as follows:

[0033] As Figure 3 shown, the frame 3 includes a fixed support frame 301, a caster mounting bracket 302, a bearing seat mounting bracket 303, and a forklift support bracket 304. As Figure 2 shown, the electric drive wheel 1 includes a cylindrical shaft 101 of the electric drive wheel. The cylindrical shaft 101 of the electric drive wheel is located at the top of the tire area of the electric drive wheel. The tire area of the electric drive wheel is integrated with a motor, a tire, and a brake. Therefore, using an electric drive wheel can save installation space and avoid installing the motor separately under the frame, which affects the height of the frame. For example, when a power battery pack for charging a mobile electric vehicle is carried on the frame, using the mobile chassis provided by the embodiment of the present application, the motor is integrated into the electric drive wheel, so that the overall position of the frame is relatively low. When carrying the power battery pack, there is no need to adjust the height of the power battery pack.

[0034] Continuing to combine Figures 1 to 4 to describe the connection relationships between the various components in the mobile chassis, a bearing connecting piece 4 is sleeved on the cylindrical shaft 101 of the electric drive wheel. The side end of the bearing connecting piece 4 is connected to the bearing seat mounting bracket 303 of the frame; the top end of the cylindrical shaft 101 of the electric drive wheel protrudes from the top end of the bearing connecting piece 4 along the axial direction of the cylindrical shaft, and the top end of the cylindrical shaft 101 of the electric drive wheel is connected to the control handle 2; the fixed caster 5 is connected to the caster mounting bracket 302 of the frame. Connecting the electric drive wheel and the frame with a bearing connecting piece can effectively save costs and cancel the power steering.

[0035] Among them, the bearing connecting piece includes the following specific structure:

[0036] As Figure 4As shown, the bearing connector 4 includes a deep groove ball bearing 401, a bearing housing 402, and a tapered roller bearing 403 that are coaxially arranged in sequence. The deep groove ball bearing 401 is arranged in a hole on one side of the bearing housing 402 along the bearing direction, and the tapered roller bearing 403 is arranged in a hole on the other side of the bearing housing 402 along the bearing direction. The deep groove ball bearing 401, the bearing housing 402, and the tapered roller bearing 403 of the bearing connector 4 are arranged in sequence along the direction from the top end to the bottom end of the cylindrical shaft 101 of the electric drive wheel. The diameter of the deep groove ball bearing 401 is smaller than that of the tapered roller bearing 403. The cylindrical shaft 101 of the electric drive wheel includes two integrally formed parts, an upper cylindrical shaft and a lower cylindrical shaft. The diameter of the upper cylindrical shaft is smaller than that of the lower cylindrical shaft, and the shaft surface of the upper cylindrical shaft is located at the top end of the cylindrical shaft of the electric drive wheel. Therefore, after the bearing connector is sleeved on the cylindrical shaft of the electric drive wheel, the deep groove ball bearing 401 is located on the upper cylindrical shaft of the electric drive wheel, and the tapered roller bearing 403 is located on the lower cylindrical shaft of the electric drive wheel. The deep groove ball bearing can better meet the rotation ability required for the rotation of the operating handle, and the tapered roller bearing has a large bearing capacity, which can meet the bearing capacity required for the movement of products with a large load on the moving chassis.

[0037] Continuing to combine Figure 3 it can be seen that the bearing housing mounting bracket 303 is arranged at one end of the frame, and the caster mounting bracket 302 is arranged at the other end of the frame. Specifically, the bearing housing mounting bracket 303 is arranged at the central position of one end of the frame, the caster mounting bracket 302 is arranged at both sides of the other end of the frame, and the caster mounting bracket 302 and the bearing housing mounting bracket 303 are coaxially arranged. The caster mounting brackets provided in the frame of the embodiment of the present application are two caster mounting brackets that are symmetrically arranged at the other end of the frame. Therefore, the center lines of the two caster mounting brackets and the center line of the bearing housing mounting bracket are the same line. An electric drive wheel is installed at the bearing housing mounting bracket 303, and a directional caster is installed at the caster mounting bracket 302. Among them, the number and positional installation relationship of the bearing housing mounting bracket and the caster mounting bracket are not limited to Figure 3 the manner shown, and other installation relationships that can ensure the stable movement of the frame are also acceptable.

[0038] Continuing to combine Figure 2 and Figure 3It can be known that among them, the bearing seat mounting bracket 303 of the vehicle frame is connected to the electric drive wheel. Specifically, a first internal bolt hole is provided at the side end of the bearing seat of the bearing connecting member 4, the bearing seat mounting bracket 303 is provided with a first through hole, and the side end of the bearing seat of the bearing connecting member is connected to the bearing seat mounting bracket through a first bolt. In the embodiment of the present application, 6 first internal bolt holes are provided at the side end of the bearing seat. Among them, 4 first internal bolt holes are provided on the side surface 401-1 of the side end of the bearing seat, and 2 first internal bolt holes are provided on the top surface 401-2 of the side end of the bearing seat adjacent to and perpendicular to the side surface 401-1 of the side end of the bearing seat. The bearing seat mounting bracket is provided with 6 first through holes corresponding to the positions of the above-mentioned first internal bolt holes respectively, and the side end of the bearing seat is connected to the bearing seat mounting bracket through 6 first bolts. The first bolt can be an M8 bolt. Among them, the number of first bolts used for the bearing seat mounting bracket and the side end of the bearing seat is not limited. The bearing seat mounting bracket and the side end of the bearing seat can also adopt other connection methods, such as welding method, etc., which are not limited here.

[0039] Among them, the welding method is specifically as follows: after the electric drive wheel is sleeved with the bearing connecting member, the bearing connecting member and the bearing seat mounting bracket of the vehicle frame are installed, and then welding is carried out to prevent the bearing connecting member and the bearing seat mounting bracket from being unable to be installed after welding deformation, and to perform anti-corrosion treatment on the bearing connecting member separately in the later stage.

[0040] The fixed caster 5 is connected to the caster mounting bracket 302. Specifically, the fixed caster is provided with a caster mounting hole, the caster mounting bracket is provided with a back welding nut, and the caster mounting hole of the fixed caster is connected to the back welding nut of the caster mounting bracket through a fourth bolt. In the embodiment of the present application, the fixed caster is provided with 8 caster mounting holes, and the corresponding caster mounting bracket is provided with 8 back welding nuts. The caster mounting hole of the fixed caster is connected to the back welding nut of the caster mounting bracket through 8 fourth bolts. Among them, the number of fourth bolts used for the caster mounting bracket and the fixed caster is not limited. The caster mounting bracket and the fixed caster can also adopt other connection methods, which are not limited here.

[0041] The above is the description of the connection method between the bearing seat mounting bracket of the vehicle frame and the electric drive wheel, and the connection method between the caster mounting bracket and the fixed caster.

[0042] In addition, after the electric drive wheel is connected to the bearing seat mounting bracket through the bearing connecting member, the top end of the cylindrical shaft of the electric drive wheel protrudes along the axial direction of the cylindrical shaft from the top end of the bearing connecting member, by Figure 1It can be seen that the top end of the cylindrical shaft of the electric drive wheel is higher than the top end of the bearing connecting member. Therefore, the top end of the cylindrical shaft of the electric drive wheel can be connected to the end of the control handle. Specifically, a second internal thread hole is provided at the top end of the cylindrical shaft of the electric drive wheel, and a second through hole corresponding to the second internal thread hole is provided at the end of the control handle. The top end of the electric drive wheel and the control handle are connected by a second bolt.

[0043] As Figure 1 and Figure 2 shown, 6 second internal thread holes are provided on the top end shaft surface of the cylindrical shaft of the electric drive wheel, and 6 second through holes corresponding to the second internal thread holes are provided on the 201 plane at the end of the control handle. The top end shaft surface of the cylindrical shaft of the electric drive wheel and the end plane of the control handle are connected by 6 second bolts. Among them, the number of second bolts used for the cylindrical shaft of the electric drive wheel and the control handle is not limited. The cylindrical shaft of the electric drive wheel and the control handle can also be connected in other ways, which are not limited here.

[0044] In addition, as Figure 3 shown, the vehicle body frame of the vehicle frame 3 is a rectangular vehicle body frame composed of a plurality of longitudinal beams and cross beams; the vehicle body frame includes a caster mounting bracket area and a fixed support area formed by fixed support members, and the fixed support area is located between the bearing seat mounting bracket and the caster mounting bracket area; a forklift support bracket 304 is further provided at the bottom end of the periphery of the vehicle body frame, and the forklift support bracket is a load-bearing point for carrying products on the vehicle body frame. As Figure 3 shown, the vehicle frame 3 includes a fixed support frame 301, a caster mounting bracket 302, a bearing seat mounting bracket 303, and a forklift support bracket 304. The vehicle body frame of the vehicle frame includes a rectangular vehicle body frame composed of two cross beams and two longitudinal beams. Specifically, the first cross beam 305 and the second cross beam 306 in the horizontal direction are parallel to each other, and the first longitudinal beam 307 and the second longitudinal beam 308 in the vertical direction are parallel to each other. In addition, the interior of the rectangular vehicle body frame is divided into two areas, a caster mounting bracket area and a fixed support area, by a third longitudinal beam 309. The fixed support area is located between the caster mounting bracket area and the bearing seat mounting bracket, and the bearing seat mounting bracket is fixed on the first longitudinal beam 307. A plurality of support members are provided in the fixed support area and are respectively clamped on the first cross beam, the second cross beam, the first longitudinal beam and the third longitudinal beam to fixedly support the vehicle body frame of the vehicle frame, ensure the stability of the vehicle body frame, and facilitate carrying items with a weight greater than a preset weight threshold.

[0045] The above description is about the connection relationships among the electric drive wheels, the control handle, the bearing connectors, the vehicle frame, and the swivel casters in the mobile chassis. Among them, the cylindrical shaft of the electric drive wheel is connected to the bearing connector in a sleeved manner. Specifically, the cylindrical shaft of the electric drive wheel is connected to the bearing connector through a shaft-hole connection method. During installation, a copper hammer can be used to strike the bearing connector to fixedly connect the bearing connector to the cylindrical shaft of the electric drive wheel, so as to ensure the perpendicular relationship between the bearing connector and the cylindrical shaft of the electric drive shaft. The other components are connected by bolts. In order to improve the installation accuracy among the components, the through holes are round holes, so as to meet the installation accuracy and complete the assembly smoothly.

[0046] In addition, by using the above-mentioned mobile chassis, a power battery pack can be carried. Specifically, it further includes: a power battery pack, and the power battery pack includes a power battery frame; the power battery frame of the power battery pack is connected to the vehicle body frame of the vehicle body by a third bolt. As Figure 1 and Figure 2 shown, a plurality of third inner bolt holes are provided on the vehicle body frame of the vehicle frame, and the bottom end of the power battery pack is provided with a power battery frame. The power battery frame is provided with a plurality of fixing holes corresponding to the third inner bolt holes. Therefore, the power battery pack and the vehicle body frame of the vehicle body can be connected by a plurality of third bolts.

[0047] For the mobile chassis installed in the above manner, since the motor is integrated in the electric drive wheel, the installation space of the motor is saved. There is no need to separately arrange the motor under the vehicle frame, which saves the installation space of the motor for the vehicle frame of the mobile chassis and reduces the installation height of the vehicle frame. Thus, items with higher height requirements can be carried, such as the power battery pack. At the same time, a bearing connector is sleeved on the cylindrical shaft of the electric drive wheel. The deep groove ball bearing in the bearing connector can meet the rotation ability required for steering during the movement of the mobile chassis, and the tapered roller bearing can meet the requirement of a larger bearing capacity.

[0048] Second Embodiment

[0049] For the content related to the second embodiment of this application and the first embodiment, please refer to the foregoing content. The following description is only illustrative.

[0050] Please refer to Figure 5 and Figure 6 , Figure 5 which is a schematic structural diagram of a mobile cart carrying a power battery pack provided by the second embodiment of this application. Figure 6 which is an exploded view of a mobile cart carrying a power battery pack provided by the second embodiment of this application.

[0051] The second embodiment of the present application provides a mobile trolley for carrying a power battery pack, including: a mobile chassis and a power battery pack disposed on the mobile chassis. On the basis of the mobile chassis provided in the above first embodiment, the power battery pack is installed. By using this mobile chassis to install the power battery pack, there is no need to separately set an installation position for the motor below the frame position of the mobile chassis, which reduces the installation position of the frame. Therefore, sufficient height space is provided for the power battery pack, and power battery packs with various height requirements can be adapted. Moreover, the electric drive wheels in the mobile chassis are connected to the frame through bearing connectors. The bearing connectors include deep groove ball bearings and tapered roller bearings. The deep groove ball bearings can better meet the rotational ability required for the rotation of the operating handle, and the tapered roller bearings have a large load-bearing capacity, which can meet the bearing load capacity required when the mobile chassis carries products with a large weight during movement.

[0052] Although the present application is disclosed above in preferred embodiments, it is not intended to limit the present application. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present application. Therefore, the protection scope of the present application should be subject to the scope defined by the claims of the present application.

Claims

1. A mobile chassis, characterized in that, Comprising: A vehicle frame, an electric drive wheel integrated with a motor, a bearing connecting member, a control handle, and a swivel caster; The vehicle frame includes a bearing seat mounting bracket provided at one end of the vehicle frame and a caster mounting bracket provided at the other end of the vehicle frame; A cylindrical shaft of the electric drive wheel is sleeved with the bearing connecting member, and a side end of the bearing connecting member is connected to the bearing seat mounting bracket of the vehicle frame; a top end of the cylindrical shaft of the electric drive wheel protrudes from a top end of the bearing connecting member along an axial direction of the cylindrical shaft, and the top end of the cylindrical shaft of the electric drive wheel is connected to the control handle; the swivel caster is connected to the caster mounting bracket of the vehicle frame.

2. The mobile trolley according to claim 1, characterized in that, The bearing connecting member includes a deep groove ball bearing, a bearing seat, and a tapered roller bearing that are coaxially arranged in sequence, the deep groove ball bearing is arranged in a side hole of the bearing seat along a bearing direction of the bearing seat, and the tapered roller bearing is arranged in the other side hole of the bearing seat along the bearing direction of the bearing seat; The deep groove ball bearing, the bearing seat, and the tapered roller bearing of the bearing connecting member are arranged in sequence along a direction from a top end to a bottom end of the cylindrical shaft of the electric drive wheel.

3. The mobile trolley according to claim 2, characterized in that, A first inner bolt hole is provided at a side end of the bearing seat of the bearing connecting member, a first through hole is provided in the bearing seat mounting bracket, and the side end of the bearing seat of the bearing connecting member is connected to the bearing seat mounting bracket by a first bolt.

4. The mobile trolley according to claim 1, characterized in that, The bearing seat mounting bracket is provided at a central position at one end of the vehicle frame, the caster mounting brackets are provided at both sides at the other end of the vehicle frame, and the caster mounting brackets are coaxially arranged with the bearing seat mounting bracket.

5. The mobile trolley according to claim 1, characterized in that, A second inner threaded hole is provided at a top end of the cylindrical shaft of the electric drive wheel, a second through hole corresponding to the second inner threaded hole is provided at a terminal end of the control handle, and the top end of the electric drive wheel is connected to the control handle by a second bolt.

6. The mobile trolley according to claim 1, wherein Further comprising: A power battery pack, the power battery pack includes a power battery frame; The power battery frame of the power battery pack is connected to a vehicle body frame of the vehicle body by a third bolt.

7. The mobile trolley according to claim 1, wherein The swivel caster is provided with a caster mounting hole, the caster mounting bracket is provided with a back weld nut, and the caster mounting hole of the swivel caster is connected to the back weld nut of the caster mounting bracket by a fourth bolt.

8. The mobile trolley according to claim 1, characterized in that, The vehicle body frame of the vehicle frame is a rectangular vehicle body frame composed of a plurality of longitudinal beams and cross beams; the vehicle body frame includes a caster mounting bracket area and a fixed support area formed by fixed support members, and the fixed support area is located between the bearing seat mounting bracket and the caster mounting bracket area; Forklift support brackets are further provided at bottom ends around the vehicle body frame, and the forklift support brackets are load-bearing points for carrying products on the vehicle body frame.

9. A mobile trolley for carrying a power battery pack, characterized in that, Comprising: A mobile chassis and a power battery pack provided on the mobile chassis; the mobile chassis adopts the mobile chassis according to any one of claims 1 to 8.

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