A skateboard chassis for a vehicle

Abstract

The application discloses a kind of vehicle skateboard chassis, belong to vehicle technical field.It includes beam rod, beam rod constitutes the crossbeam and / or longitudinal beam of skateboard chassis, beam rod includes: first pipe, rotationally installed with moving gear;Second pipe, one end slidingly covers in the one end of first pipe, and the inner wall of second pipe is provided with the moving rack that is engaged with moving gear;Driving motor, installed in the inside of first pipe, driving motor is used to drive moving gear rotation.By the relative telescopic motion of first pipe and second pipe, the stepless adjustable length of beam rod is realized.I.e.it can realize the stepless adjustable of skateboard chassis wheelbase and / or track, solve the demand of user vehicle scene diversification.Also can be large-scale platform, reduce the difficulty, cycle and cost of making car, marketing means is various, can provide whole car, chassis, car body and the diverse service of car body refitting for user, while battery capacity can be expanded, reduce the anxiety of user to range.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicles, in particular to a sliding plate chassis of a vehicle. BACKGROUND

[0002] Under the background that sliding plate chassis gradually becomes the mainstream of vehicle enterprises, the use scene of sliding plate chassis also becomes the topic of common discussion among R&D personnel. There are two main ways for the current sliding plate chassis to cooperate with the whole vehicle: 1. Factory implementation, that is, the sliding plate chassis becomes a modular means of the host factory, and the sliding plate chassis is used as a whole to replace the scattered chassis assembly line; 2. User implementation, that is, the user purchases a chassis, and through the replacement of different vehicle bodies, the online control technology is added to realize the multiple combinations of different vehicle bodies and different performances, such as magneto-rheological shock absorber, online steering, online braking, which can realize different performance chassis with the same hardware chassis, so that the whole chassis is highly platformized, and the vehicle control performance is diversified, which brings different driving pleasure to the driver.

[0003] User implementation (concept scheme), that is, the user can frequently replace the vehicle body according to the use scene, and only needs to purchase a chassis. When there are different needs, the user can go to the vehicle body replacement station to quickly replace the vehicle body, which brings the user diversified vehicle experience, and can save the user's vehicle cost. The user can choose to use a sedan body in the city working condition, and can go to the vehicle body replacement station to choose an SUV body or an MPV body when preparing for outdoor travel or carrying more personal belongings.

[0004] However, the current sliding plate chassis has the following problems: ① The chassis wheelbase corresponds to the vehicle body wheelbase, and it is difficult to realize cross-border vehicle body replacement. For example, a sliding plate chassis with a wheelbase of 2700mm belongs to A-class vehicle size, and can only be used with a vehicle body with a wheelbase of 2700mm, and cannot experience the fun of cross-border. ② Limited by the wheelbase of the chassis, the battery cannot be expanded, which causes the user to be anxious about the range. SUMMARY

[0005] The present application aims to provide a sliding plate chassis of a vehicle to solve one or more technical problems in the prior art, at least to provide a beneficial choice or create conditions.

[0006] The technical scheme adopted to solve the above technical problems is: a sliding plate chassis of a vehicle, comprising a beam rod, the beam rod constitutes a cross beam and / or a longitudinal beam of the sliding plate chassis, the beam rod comprises: a first pipe, a moving gear is installed; a second pipe, one end of the second pipe is slidably sleeved on one end of the first pipe, an inner wall of the second pipe is provided with a moving rack connected with the moving gear in meshing connection; a driving motor is installed in the interior of the first pipe, and the driving motor is used to drive the moving gear to rotate.

[0007] The technical scheme has at least the following beneficial effects: the driving motor can drive the moving gear to rotate, thereby driving the first pipe and the second pipe to perform relative telescopic movement, and realizing stepless adjustment of the length of the beam rod. When the longitudinal beam of the skateboard chassis is composed of the beam rod, the function of stepless adjustment of the wheelbase of the skateboard chassis can be realized, and the diversified needs of users in vehicle use scenarios are solved. The present application is a mode beneficial to both the host factory and the users, the host factory realizes separation design of the vehicle body and the chassis, and creates a key skateboard chassis. Due to the variable wheelbase of the chassis and the fact that the beam rod can form the cross beam of the skateboard chassis, the wheel track of the skateboard chassis is adjusted. Thus, large-scale platformization can be realized, the difficulty, cycle and cost of vehicle manufacturing are reduced, marketing means are diversified, and diversified services of the whole vehicle, the chassis, the vehicle body and vehicle body replacement can be provided to the users. In addition, after the length of the longitudinal beam and / or the cross beam is increased, the battery capacity can also be expanded, and the anxiety of the users about the cruising range is reduced. The users can choose to purchase the whole vehicle, the chassis, the vehicle body or lease the vehicle body service, and the use diversity can change the vehicle body in different use scenarios and the vehicle body of different specifications. In addition, the driving motor is arranged in the interior of the first pipe, which can not only increase the battery space and the cruising range of the whole vehicle, but also improve the stability of the installation of the driving motor and the use stability of the driving motor.

[0008] As a further improvement of the above technical scheme, the moving gear is arranged in the interior of the first pipe, a let-in slot is formed in one side of the first pipe, and the moving gear partially protrudes from the let-in slot and is connected with the moving rack. The moving gear is arranged in the interior of the first pipe, which can reduce the space required for installing the moving gear, lengthen the overlapping length of the first pipe and the second pipe, improve the integrity of the beam rod, and guarantee the stability and safety of the beam rod in use. In addition, the first pipe separates the moving gear from the second pipe, improves the independence of the moving gear, and guarantees the reliability of the rotation of the moving gear.

[0009] As a further improvement of the above technical scheme, a speed reducer is connected between the output end of the driving motor and the moving gear, and the axis direction of the output shaft of the driving motor is parallel to the relative sliding direction of the first pipe and the second pipe. On the one hand, the speed reducer can reduce the speed and increase the torque, and provide a larger driving force for driving the relative sliding of the first pipe and the second pipe. On the other hand, the speed reducer can also change the transmission direction, so that the installation position of the driving motor is more convenient to adjust. In addition, the telescopic direction of the first pipe and the second pipe is perpendicular to the rotation plane of the output end of the driving motor, which can reduce the influence of the vibration of the driving motor on the relative position of the first pipe and the second pipe, and improve the accuracy of the length adjustment of the beam rod.

[0010] As a further improvement of the above technical solution, the speed reducer comprises a first bevel gear mounted on the output end of the driving motor, a transmission rod mounted inside the first pipe, a second bevel gear and a first transmission gear mounted on the transmission rod, the second bevel gear is in meshing connection with the first bevel gear, the movable gear is mounted with a second transmission gear, and the second transmission gear is in meshing connection with the first transmission gear. The output end of the driving motor is reversely transmitted through the first bevel gear and the second bevel gear, and then reversely transmitted through the first transmission gear and the second transmission gear, so as to realize the speed reduction and reversing transmission between the output end of the driving motor and the movable gear. At the same time, the first bevel gear and the second bevel gear can also realize speed reduction and torque increase, so that the speed reducer realizes two-stage speed reduction transmission, the service life of the gears in the speed reducer can be improved, and the influence of the driving motor on the movable gear can be reduced.

[0011] As a further improvement of the above technical solution, the first transmission gear and the second transmission gear are both helical gears. The helical gear transmission has the advantages of good meshing performance, stable transmission, large coincidence degree, high bearing capacity and the like, so as to meet the various requirements of the driving motor and the movable gear transmission, improve the overall stability of the speed reducer, and ensure the relative stability of the driving motor and the movable gear.

[0012] As a further improvement of the above technical solution, one of the first pipe and the second pipe is mounted with a rolling bearing, and the other is in abutment with the outer side wall of the rolling bearing, and the axis direction of the rolling bearing is perpendicular to the relative sliding direction of the first pipe and the second pipe. The rolling bearing can reduce the friction force of the relative sliding of the first pipe and the second pipe, improve the smoothness of the relative sliding of the first pipe and the second pipe, and reduce the jamming situation. At the same time, the rolling bearing can bear the acting force between the first pipe and the second pipe, and improve the reliability of the connection of the first pipe and the second pipe.

[0013] As a further improvement of the above technical solution, the other of the first pipe and the second pipe is provided with a limiting sliding groove, and the two ends of the rolling bearing are limited on the two side walls of the limiting sliding groove. The rolling bearing is limited by the limiting sliding groove, which can improve the firmness of the rolling bearing, and also simplify the installation mode of the rolling bearing, facilitating the assembly of the rolling bearing. At the same time, the relative sliding direction of the first pipe and the second pipe can be guided, and the stability of the relative sliding of the first pipe and the second pipe can be improved.

[0014] As a further improvement of the above technical solution, the second pipe is internally provided with a blocking plate on the moving path of the first pipe, which is used to separate the two ends of the second pipe. When the first pipe is in contact with the blocking plate, the length of the beam rod is the shortest, thereby preventing the beam rod from being excessively shortened and affecting the performance of the skateboard chassis. Secondly, the blocking plate makes the internal cavity of the second pipe for the first pipe to expand and contract close to the end of the blocking plate, which is closed. When the relative force between the first pipe and the second pipe is too large and the transmission between the moving gear and the moving rack fails, such as when an impact occurs, the blocking plate can prevent the first pipe and the second pipe from being excessively and rapidly compressed, thereby ensuring the safety performance of the skateboard chassis.

[0015] As a further improvement of the above technical solution, the first pipe and the second pipe are respectively provided with first and second limiting blocks at the ends of the relative sliding, which can be in contact with each other to limit the relative position of the first pipe and the second pipe. Through the hard limiting of the first and second limiting blocks, the first pipe and the second pipe are not easily disengaged when sliding in opposite directions.

[0016] As a further improvement of the above technical solution, one or both ends of the moving rack are provided with a third limiting block, which is flush with the tooth end of the moving rack. When the moving gear is rotated to the end of the moving rack, the third limiting block limits the rotation of the moving gear and the relative movement of the moving rack, thereby limiting the relative sliding movement of the first pipe and the second pipe. The structure is designed ingeniously and the limiting method is reliable.

[0017] As a further improvement of the above technical solution, the second pipe is closed on the outer side of the first pipe. The internal structure of the second pipe is closed to ensure normal operation.

[0018] As a further improvement of the above technical solution, the first pipe is provided with an adjusting gear, the drive motor is in transmission connection with the adjusting gear, the first pipe is slidingly provided with an adjusting rack, the adjusting gear is in meshing connection with the adjusting rack, and the transmission ratio of the drive motor and the adjusting rack is different from the transmission ratio of the drive motor and the moving rack. Before and after the relative movement of the first pipe and the second pipe, the mass center position of the entire beam rod formed by the first pipe and the second pipe changes, and the mass center position of the skateboard chassis also changes. When the drive motor drives the moving gear to rotate and causes the first pipe and the second pipe to move relative to each other, the adjusting gear is also rotated, thereby causing the adjusting rack to move relative to the second pipe, and further adjusting the mass center position of the beam rod, so that the mass center position of the skateboard chassis is adjusted to adapt to the adjustment of the wheelbase and / or the track, thereby reducing the trouble of additional or later adjustment.

[0019] A vehicle comprising the skateboard chassis as claimed in the preceding claim. BRIEF DESCRIPTION OF DRAWINGS

[0020] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description, taken in conjunction with the following drawings of which:

[0021] Figure 1 It is a schematic diagram of the overall structure of embodiment one of the present application;

[0022] Figure 2 It is a schematic diagram of the internal structure of the first pipe in embodiment one of the present application;

[0023] Figure 3 It is a schematic diagram of the transmission connection structure of the driving motor and the moving gear in embodiment one of the present application;

[0024] Figure 4 It is a schematic diagram of the exploded structure of the first pipe and the second pipe in embodiment one of the present application;

[0025] Figure 5 It is a schematic diagram of the exploded structure of the first pipe and the second pipe in embodiment two of the present application;

[0026] Figure 6 It is a schematic diagram of the internal structure of the first pipe in embodiment three of the present application;

[0027] Figure 7 It is a schematic diagram of the transmission connection structure of the driving motor and the adjusting gear in embodiment three of the present application;

[0028] Figure 8 It is a schematic diagram of the installation position of the adjusting rack in embodiment three of the present application;

[0029] Figure 9 It is a schematic diagram of the transmission connection structure of the driving motor and the adjusting gear in embodiment four of the present application.

[0030] First pipe 10, moving gear 11, let go of the slot 12, shaft 13, installation slot 14, second pipe 20, moving rack 21, driving motor 30, first bevel gear 31, second bevel gear 32, transmission rod 33, first transmission tooth piece 34, second transmission tooth piece 35, rolling bearing 40, limit sliding groove 41, blocking plate 50, first limit block 51, second limit block 52, third limit block 53, adjusting gear 60, adjusting rack 61. DETAILED DESCRIPTION

[0031] Embodiments of the present application are described below in the detailed description and illustrated in the accompanying drawings by way of examples, which together serve to explain the present application, and are not understood as limiting the present application.

[0032] In the description of the present application, it is to be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, which is only for the purpose of facilitating the description of the present application and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0033] In the description of the present application, several meanings are one or more, and the meaning of multiple is two or more, greater than, less than, more than, etc. are understood as not including the number, above, below, etc. are understood as including the number. If the first, second is described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of indicated technical features.

[0034] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0035] Embodiment one:

[0036] Referring to Figures 1-4 A vehicle skateboard chassis includes a beam rod. The beam rod includes a first pipe 10, a second pipe 20 and a driving motor 30. One end of the second pipe 20 is sleeved on the end of the first pipe 10, and the end of the first pipe 10 can slide along the length direction of the second pipe 20 relative to the second pipe 20 at the inner wall of the one end of the second pipe 20. A rotating shaft 13 is rotatably installed at the end of the first pipe 10 extending into the inner wall of the one end of the second pipe 20, and the two ends of the rotating shaft 13 are rotatably arranged on the two opposite inner side walls of the first pipe 10. A moving gear 11 is installed in the middle of the rotating shaft 13, so that the moving gear 11 is rotatably connected with the first pipe 10. The inner wall of the one end of the first pipe 10 sleeved with the second pipe 20 is provided with a moving rack 21, and the tooth distribution direction of the moving rack 21 is parallel to the length direction of the second pipe 20. A clearance slot 12 is formed in the side wall of the one end of the first pipe 10 extending into the second pipe 20, and the clearance slot 12 is located at the position close to the moving rack 21. The outer peripheral part of the moving gear 11 is allowed to pass out of the clearance slot 12 and is engaged with the moving rack 21, so that the moving gear 11 and the moving rack 21 are engaged and connected.

[0037] The driving motor 30 is fixedly installed on the inner wall of the first pipe 10. The axis direction of the output end of the driving motor 30 is parallel to the length direction of the first pipe 10 and the length direction of the second pipe 20. The output end of the driving motor 30 is provided with a speed reducer, the input end of the speed reducer is connected with the output end of the driving motor 30, and the output end of the speed reducer is connected with the moving gear 11, so that the driving motor 30 can drive the moving gear 11 to rotate.

[0038] The speed reducer comprises a first bevel gear 31, a second bevel gear 32, a first transmission gear 34 and a second transmission gear 35. The first bevel gear 31 is coaxially installed on the output end of the driving motor 30, so that the driving motor 30 can drive the first bevel gear 31 to rotate. A transmission rod 33 is rotatably installed inside the first pipe 10 close to the driving motor 30, one end of the transmission rod 33 is rotatably installed on the side wall of the first pipe 10, the other end is fixedly connected with the second bevel gear 32, the second bevel gear 32 is meshingly connected with the first bevel gear 31, so that the output end of the driving motor 30 is drivingly connected with the transmission rod 33. The transmission rod 33 is coaxially fixedly installed close to the inner wall of the first pipe 10 with the first transmission gear 34, one end of the rotating shaft 13 on which the moving gear 11 is installed is coaxially fixedly installed with the second transmission gear 35, and the first transmission gear 34 is meshingly connected with the second transmission gear 35, so that the transmission rod 33 is drivingly connected with the rotating shaft 13. Through the driving connection of the first bevel gear 31, the second bevel gear 32, the first transmission gear 34 and the second transmission gear 35, the driving motor 30 can drive the moving gear 11 to rotate.

[0039] When the driving motor 30 drives the moving gear 11 to rotate, the moving gear 11 is meshingly connected with the moving rack 21 to drive the first pipe 10 and the second pipe 20 to slide relative to each other, so as to realize the stepless adjustment of the overall length of the beam rod. It should be noted that the beam rod constitutes the longitudinal beam structure of the slide plate chassis, and when the length of the beam rod is adjusted, the wheelbase of the slide plate chassis can be adjusted. In other embodiments, the beam rod can constitute the cross beam structure of the slide plate chassis, and when the length of the beam rod is adjusted, the track of the slide plate chassis can be adjusted. In other embodiments, the beam rod can constitute the cross beam structure and the longitudinal beam structure of the slide plate chassis, so that the track and the wheelbase of the slide plate chassis can be adjusted, and the flexibility and adaptability of the slide plate chassis are stronger.

[0040] In other embodiments, the two ends of the transmission rod 33 can be rotatably installed in the two opposite inner side walls of the first pipe 10, and the second bevel gear 32 is located at the middle position of the transmission rod 33.

[0041] In other embodiments, the speed reducer can only include the first bevel gear 31 and the second bevel gear 32, the second bevel gear 32 is coaxially fixedly installed with the rotating shaft 13, the output end of the driving motor 30 is in transmission connection with the rotating shaft 13, and the driving motor 30 drives the moving gear 11. It should be noted that if the output shaft axis direction of the driving motor 30 is not required to be parallel to the relative sliding direction of the first pipe 10 and the second pipe 20, the first bevel gear 31 and the second bevel gear 32 can be replaced by cylindrical gears.

[0042] Among them, the first transmission gear 34 and the second transmission gear 35 are both adapted helical gears. It can be understood that the first transmission gear 34 and the second transmission gear 35 are cylindrical gears, and in other embodiments, the first transmission gear 34 and the second transmission gear 35 can also be conical gears.

[0043] Optionally, the outer side of the first pipe 10 is provided with a plurality of installation grooves 14 along the length direction, the length direction of the installation groove 14 is perpendicular to the length direction of the first pipe 10, and the installation groove 14 penetrates the first pipe 10. A plurality of installation grooves 14 are arranged in an alternating manner on the two adjacent sides of the first pipe 10. A rolling bearing 40 is rotatably installed in the installation groove 14, and the rolling bearing 40 is preferably a roller bearing. Two rolling bearings 40 are arranged side by side along the length direction in the same installation groove 14. The outer peripheral side wall of the rolling bearing 40 protrudes from the outer side wall of the first pipe 10 and abuts against the inner side wall of the second pipe 20. The inner side wall of the second pipe 20 is provided with a plurality of ribs, the length direction of the ribs is parallel to the length direction of the second pipe 20, and a limiting sliding groove 41 is formed between two adjacent ribs. The limiting sliding groove 41 is arranged in one-to-one correspondence with the rolling bearing 40, and the two inner side walls of the limiting sliding groove 41 abut against the two ends of the corresponding rolling bearing 40, so that the rolling bearing 40 is guided to slide by the two adjacent ribs. Under the guiding and rolling action of the rolling bearing 40, the stability of the relative sliding between the first pipe 10 and the second pipe 20 can be realized, the noise can be reduced, and the NVH problem in the operation of the actuator can be solved. It can be understood that since the two inner side walls of the limiting sliding groove 41 can limit the positions of the two ends of the rolling bearing 40, the rolling bearing 40 can not only rotate around its axis, but also slide along the length direction of the installation groove 14 in the installation groove 14 and come out from one end or both ends of the installation groove 14, thereby improving the convenience and flexibility of the installation of the rolling bearing 40.

[0044] It can be understood that the limiting sliding groove 41 is formed by setting two ribs, and can also be formed by directly grooving the inner wall of the second pipe 20. Generally, the inner wall of the second pipe 20 provided with the moving rack 21 cannot provide more area for the rolling bearing 40 to abut against, and the rolling bearing 40 can be selected not to be arranged on the side of the first pipe 10 corresponding to the moving rack 21 or a shorter rolling bearing 40 can be arranged. In other embodiments, the rolling bearing 40 can also be selected to be installed on the inner side of the second pipe 20, and the limiting sliding groove 41 corresponding to the rolling bearing 40 can be arranged on the outer side of the first pipe 10, which can also have the effect of improving the stability of the relative sliding of the first pipe 10 and the second pipe 20. The number of the installation grooves 14 arranged side by side and the number of the rolling bearings 40 installed in each installation groove 14 can be determined according to the actual situation of the size of the first pipe 10, the size of the second pipe 20 and the range of the relative sliding of the two pipes.

[0045] Optionally, a blocking plate 50 is arranged in the second pipe 20, and the blocking plate 50 and the second pipe 20 can be integrally formed or detachably connected by fasteners. The blocking plate 50 has the same cross section as the inner cavity of the second pipe 20, so that the blocking plate 50 can separate the two ends of the inner cavity of the second pipe 20. The outer side of the second pipe 20 for the sliding of the first pipe 10 is closed, that is, the outer side of the second pipe 20 wrapping the first pipe 10 is not provided with a through hole or a slot structure, so that the end of the first pipe 10 is not exposed to the external environment through the second pipe 20, and the normal operation of the internal structure is ensured. It can be understood that the blocking plate 50 limits the sliding position of the first pipe 10, and when one end of the first pipe 10 abuts against the blocking plate 50, the length of the beam is the shortest.

[0046] Embodiment two:

[0047] Referring to Figure 5 The difference between the present embodiment and the first embodiment is that the first pipe 10 is further provided with a first limiting block 51, and the second pipe 20 is provided with a second limiting block 52. When the first pipe 10 and the second pipe 20 slide relative to each other to the preset farthest distance, that is, the length of the beam is the longest, the first limiting block 51 and the second limiting block 52 abut against each other, so that the first pipe 10 cannot deviate from the preset range of the second pipe 20, and the normal use of the beam is ensured. It can be understood that the first limiting block 51 can be a protruding block structure protruding from the outer side of the first pipe 10, or a ring-shaped ring structure arranged around the outer periphery of the first pipe 10, and the first limiting block 51 and the first pipe 10 can be integrally formed or detachably connected by fasteners. The second limiting block 52 can be a protruding block structure protruding from the outer side of the second pipe 20, or a ring-shaped ring structure arranged around the outer periphery of the second pipe 20, and the second limiting block 52 and the second pipe 20 can be integrally formed or detachably connected by fasteners.

[0048] Optionally, a third limiting block 53 is arranged at each end of the movable rack 21, one side of the third limiting block 53 is connected with the inner wall of the second pipe 20, the other side is flush with the tooth end of the movable rack 21, and the third limiting block 53 is the same as the width of the movable rack 21 and corresponds to it. When the movable gear 11 rotates to the end of the movable rack 21, the movable gear 11 cannot continue to rotate due to the limitation of the third limiting block 53, and the first pipe 10 and the second pipe 20 cannot continue to slide relative to each other, so that the relative sliding range of the first pipe 10 and the second pipe 20 can be limited.

[0049] When the first pipe 10 and the second pipe 20 move to the first pipe 10 abutting the blocking plate 50, the movable gear 11 just abuts the third limiting block 53 at the corresponding end and cannot continue to rotate; when the first pipe 10 and the second pipe 20 move to the first limiting block 51 and the second limiting block 52 abutting each other, the movable gear 11 just abuts the third limiting block 53 at the other end and cannot continue to rotate, so that the relative sliding range of the first pipe 10 and the second pipe 20 can be double-limited, and the reliability and safety of the relative sliding of the first pipe 10 and the second pipe 20 are guaranteed.

[0050] In other embodiments, when the first pipe 10 and the second pipe 20 move to the first pipe 10 abutting the blocking plate 50, the movable gear 11 can still engage with the movable rack 21 for a small distance before abutting the third limiting block 53 at the corresponding end, or when the movable gear 11 abuts the third limiting block 53 at the corresponding end, there is still a small distance between the first pipe 10 and the blocking plate 50; when the first pipe 10 and the second pipe 20 move to the first limiting block 51 and the second limiting block 52 abutting each other, the movable gear 11 can still engage with the movable rack 21 for a small distance before abutting the third limiting block 53 at the other end, or when the movable gear 11 abuts the third limiting block 53 at the other end, there is still a small distance between the first limiting block 51 and the second limiting block 52. Thus, the relative sliding range of the first pipe 10 and the second pipe 20 can be two-stage limited, and the reliability and safety of the relative sliding of the first pipe 10 and the second pipe 20 are guaranteed.

[0051] Embodiment three:

[0052] Reference Figures 6-7The embodiment is different from the embodiment one in that a balance bar and a driving member are further arranged, the driving member comprises an adjusting gear 60, the balance bar is an adjusting rack 61, the adjusting gear 60 is installed on the rotating shaft 13, and the adjusting gear 60 and the second transmission gear 35 are respectively located at two end positions of the moving gear 11. The interior of the first pipe 10 is provided with a sliding track, the adjusting rack 61 slides on the sliding track along the length direction of the first pipe 10, and the tooth distribution direction of the adjusting rack 61 is parallel to the direction of the first pipe 10. The adjusting gear 60 is in meshing connection with the adjusting rack 61. The driving motor 30 drives the rotating shaft 13 to rotate through the first bevel gear 31, the second bevel gear 32, the first transmission gear 34 and the second transmission gear 35, so that the moving gear 11 and the adjusting gear 60 can be synchronously rotated, the moving gear 11 can drive the first pipe 10 to slide relative to the second pipe 20, and the adjusting gear 60 can drive the adjusting rack 61 to slide relative to the first pipe 10.

[0053] It should be noted that the transmission ratio of the adjusting gear 60 and the adjusting rack 61 is different from the transmission ratio of the moving gear 11 and the moving rack 21. That is, when the moving gear 11 and the adjusting gear 60 synchronously rotate, the moving speed of the second pipe 20 relative to the first pipe 10 is different from the moving speed of the adjusting rack 61 relative to the first pipe 10, so that the direction and speed of the adjusting rack 61 relative to the second pipe 20 can be used to adjust the mass center position of the whole, so as to realize the regulation of the mass center of the whole after the adjustment of the wheelbase and the track of the skateboard chassis. It can be understood that the transmission ratio of the gear and the rack refers to the ratio of the gear rotation speed to the rack speed, and the greater the transmission ratio of the gear and the rack, the smaller the rack speed compared with the gear rotation speed, that is, the smaller the distance of the rack moving driven by one rotation of the gear.

[0054] ①Specifically, the above theory is analyzed by taking the first pipe 10 as a reference static object:

[0055] Referring to Figure 8 a, when the installation positions of the moving rack 21 and the adjusting rack 61 are at the same side, at this time, the moving direction of the second pipe 20 relative to the first pipe 10 is the same as the moving direction of the adjusting rack 61 relative to the first pipe 10:

[0056] If the transmission ratio of the adjusting gear 60 and the adjusting rack 61 is greater than the transmission ratio of the moving gear 11 and the moving rack 21, the moving speed value of the adjusting rack 61 relative to the first pipe 10 is smaller than the moving speed value of the second pipe 20 relative to the first pipe 10, so that the mass center position of the whole is adjusted towards the direction of the side where the second pipe 20 is located;

[0057] If the transmission ratio of the adjusting gear 60 and the adjusting rack 61 is less than the transmission ratio of the moving gear 11 and the moving rack 21, the moving speed value of the adjusting rack 61 relative to the first pipe 10 is greater than the moving speed value of the second pipe 20 relative to the first pipe 10, so that the overall mass center position is adjusted towards the side where the first pipe 10 is located.

[0058] Specifically, the above theory is analyzed by taking the second pipe 20 as a reference static object.

[0059] With reference to Figure 8 When the installation positions of the moving rack 21 and the adjusting rack 61 are on opposite sides, at this time, the moving direction of the first pipe 10 relative to the second pipe 20 is the same as the moving direction of the adjusting rack 61 relative to the second pipe 20.

[0060] If the transmission ratio of the adjusting gear 60 and the adjusting rack 61 is greater than the transmission ratio of the moving gear 11 and the moving rack 21, the moving speed value of the adjusting rack 61 relative to the second pipe 20 is less than the moving speed value of the first pipe 10 relative to the second pipe 20, so that the overall mass center position is adjusted towards the side where the first pipe 10 is located.

[0061] If the transmission ratio of the adjusting gear 60 and the adjusting rack 61 is less than the transmission ratio of the moving gear 11 and the moving rack 21, the moving speed value of the adjusting rack 61 relative to the second pipe 20 is greater than the moving speed value of the first pipe 10 relative to the second pipe 20, so that the overall mass center position is adjusted towards the side where the second pipe 20 is located.

[0062] In other embodiments, the driving member can further include a power motor, and the output end of the power motor is in transmission connection with the adjusting gear 60. The rotation of the adjusting gear 60 is controlled by controlling the power motor, so as to realize the adjustment of the overall mass center after the adjustment of the wheelbase and / or the track of the skateboard chassis. It can be understood that the sliding direction of the adjusting rack 61 means the adjustable direction of the mass center, and therefore, the length direction of the adjusting rack 61 and the sliding direction relative to the first pipe 10 can be set according to actual needs. In addition, it should be noted that the degree of adjustment of the mass center is associated with the mass of the adjusting rack 61, and the adjusting rack 61 can be composed of a rack and a specially designed mass bar, and the mass distribution of the mass bar can meet the needs of adjusting the overall mass center position.

[0063] Embodiment Four

[0064] With reference to Figure 9The difference between the embodiment and the embodiment three is that the installation position of the adjusting gear 60 is different. The two ends of the transmission rod 33 are respectively rotationally installed on two opposite inner walls of the first pipe 10, the adjusting gear 60 is coaxially and fixedly installed on the end of the transmission rod 33 away from the first transmission gear 34, and the adjusting gear 60 is in meshing connection with the adjusting rack 61. The driving motor 30 drives the moving gear 11 to rotate through the first bevel gear 31, the second bevel gear 32, the first transmission gear 34 and the second transmission gear 35, so as to drive the first pipe 10 to slide relative to the second pipe 20, and at the same time, the driving motor 30 drives the adjusting gear 60 to rotate through the first bevel gear 31 and the second bevel gear 32, so as to drive the adjusting rack 61 to slide relative to the first pipe 10.

[0065] It should be noted that the transmission ratio of the first transmission gear 34 and the moving rack 21 is different from the transmission ratio of the adjusting gear 60 and the adjusting rack 61, that is, when the first transmission gear 34 and the adjusting gear 60 rotate synchronously, the moving speed of the second pipe 20 relative to the first pipe 10 is different from the moving speed of the adjusting rack 61 relative to the first pipe 10, so that the direction and speed of the adjusting rack 61 relative to the second pipe 20 can be used to adjust the mass center position of the whole, so as to realize the regulation of the mass center of the whole after the adjustment of the wheelbase and the track of the skateboard chassis.

[0066] The above embodiment of the application is described in detail in combination with the drawings, but the application is not limited to the above embodiment, and various changes can be made within the knowledge of those skilled in the art without departing from the purpose of the application.

Claims

1. A skateboard chassis for a vehicle, characterized in that, Includes beams that form the crossbeams and / or longitudinal beams of the slide plate chassis, the beams comprising: The first pipe fitting is equipped with a moving gear; The second pipe fitting has one end slidably sleeved on one end of the first pipe fitting. The inner wall of the second pipe fitting is provided with a movable rack that meshes with the movable gear. A rotating shaft is rotatably installed on the inner wall of the end of the first pipe fitting that extends into the second pipe fitting. The two ends of the rotating shaft are respectively rotatably disposed on two opposite inner side walls of the first pipe fitting. A movable gear is installed in the middle of the rotating shaft, so that the movable gear is rotatably connected to the first pipe fitting. A drive motor is installed inside the first pipe fitting, and the drive motor is used to drive the moving gear to rotate; a reducer is connected between the output end of the drive motor and the moving gear, and the axial direction of the output shaft of the drive motor is parallel to the direction in which the first pipe fitting and the second pipe fitting slide relative to each other; the reducer includes a first bevel gear installed at the output end of the drive motor, a transmission rod is installed inside the first pipe fitting, the transmission rod is equipped with a second bevel gear and a first transmission gear, the second bevel gear is meshed with the first bevel gear, the moving gear is equipped with a second transmission gear, and the second transmission gear is meshed with the first transmission gear; The system comprises a balance bar and a drive mechanism. The drive mechanism includes an adjusting gear, and the balance bar is an adjusting rack. The adjusting gear is mounted on a rotating shaft, and the adjusting gear and the second transmission gear are located at opposite ends of the moving gear. A sliding track is provided inside the first tube, and the adjusting rack slides along the length of the first tube on the sliding track, with the tooth distribution direction of the adjusting rack parallel to the direction of the first tube. The adjusting gear meshes with the adjusting rack. The drive motor drives the rotating shaft to rotate via a first bevel gear, a second bevel gear, a first transmission gear, and a second transmission gear, which in turn drives the moving gear and the adjusting gear to rotate synchronously. The rotation of the moving gear causes the first tube to slide relative to the second tube, and the rotation of the adjusting gear causes the adjusting rack to slide relative to the first tube. The transmission ratio of the adjusting gear and the adjusting rack is different from that of the moving gear and the moving rack. When the moving gear and the adjusting gear rotate synchronously, the moving speed of the second pipe relative to the first pipe is different from the moving speed of the adjusting rack relative to the first pipe. The position of the overall center of mass is adjusted by using the direction and speed of the adjusting rack relative to the second pipe.

2. The vehicle skateboard chassis according to claim 1, characterized in that: The movable gear is located inside the first pipe fitting, and a clearance groove is provided on one side of the first pipe fitting. The movable gear protrudes from the clearance groove and meshes with the movable rack.

3. The vehicle skateboard chassis according to claim 1, characterized in that: Both the first transmission gear and the second transmission gear are helical gears.

4. The vehicle skateboard chassis according to claim 1, characterized in that: One of the first and second pipe fittings is equipped with a rolling bearing, and the other abuts against the outer wall of the rolling bearing. The axial direction of the rolling bearing is perpendicular to the direction in which the first and second pipe fittings slide relative to each other.

5. The vehicle skateboard chassis according to claim 4, characterized in that: The first pipe fitting and the other of the second pipe fittings are provided with a limiting groove, and the two ends of the rolling bearing are respectively limited to the two side walls of the limiting groove.

6. The vehicle skateboard chassis according to claim 1, characterized in that: The second pipe fitting has a baffle plate inside that is located on the moving path of the first pipe fitting. The baffle plate is used to separate the two ends inside the second pipe fitting.

7. The vehicle skateboard chassis according to claim 1, characterized in that: The ends of the first pipe fitting and the second pipe fitting that slide relative to each other are respectively provided with a first limiting block and a second limiting block. The first limiting block and the second limiting block can abut against each other to limit the relative position of the first pipe fitting and the second pipe fitting.

8. The skateboard chassis for a vehicle according to claim 1, characterized in that: A third limiting block is provided at one or both ends of the movable rack, and one side of the third limiting block is flush with the tooth end of the movable rack.

9. The skateboard chassis for a vehicle according to claim 1, characterized in that: The second pipe fitting is enclosed near the outer side of the first pipe fitting.

10. A vehicle, characterized in that: Includes the skateboard chassis of a vehicle as described in any one of claims 1-9.

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