Frame assembly and two-wheeled vehicle

Abstract

The present application relates to the technical field of vehicles, and discloses a frame assembly and a two-wheeled vehicle. The frame assembly comprises a frame body and a container; the frame body is provided with a first connecting portion and a second connecting portion; an end portion of the container is provided with a first mating portion and a second mating portion spaced apart from each other; the first connecting portion and the first mating portion are detachably connected, and the second connecting portion and the second mating portion are detachably connected, so that the frame body and the container can be assembled or disassembled. The two-wheeled vehicle further comprises a front wheel and a rear wheel, the rear wheel is mounted on the frame body, the front wheel is arranged on the side of the container distant from the frame body, and the front wheel and the rear wheel are also of detachable structures, so that the two-wheeled vehicle can be disassembled into four parts: the front wheel, the rear wheel, the frame body, and the container. All the parts can be separately packaged during transportation and assembled upon arrival at a destination, and storage space can be planned for separate components during transportation, maximizing space utilization, reducing component transportation costs, and improving transportation efficiency.

Description

Frame assembly and double-wheeled vehicle

[0001] Related applications

[0002] This application claims priority to Chinese patent applications with application numbers 202410888129.4, 202421561735.7, 202421551235.5, 202421552377.3, 202421569898.X, filed on July 2, 2024, the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of vehicles, in particular to a frame assembly and a double-wheeled vehicle. BACKGROUND

[0004] E-cargo double-wheeled vehicles for carrying goods are usually equipped with an electric auxiliary system including a motor, a battery and a control system, which can provide power support for the rider when riding, so that the riding is relatively easy even when carrying a large amount of goods. The double-wheeled vehicle for carrying goods usually has a reinforced frame, a large-capacity cargo rack or an extended cargo platform, which can safely and stably transport goods such as supermarket shopping, furniture, child pick-up or commercial delivery, etc. The double-wheeled vehicle of this type is relatively large and inconvenient for long-distance transportation, and occupies more space, which limits the transportation quantity. SUMMARY

[0005] The main purpose of the present application is to provide a frame assembly and a double-wheeled vehicle, which aims to solve the problem of inconvenient transportation of double-wheeled vehicles.

[0006] To achieve the above-mentioned purpose, the frame assembly provided by the present application is applied to a double-wheeled vehicle, which includes a front wheel and a rear wheel, and the frame assembly includes:

[0007] a frame body, the frame body being provided with a first connecting portion and a second connecting portion;

[0008] a cargo box, the cargo box being provided with a first matching portion and a second matching portion arranged at intervals, the first connecting portion being detachably connected with the first matching portion, and the second connecting portion being detachably connected with the second matching portion, so that the frame body and the cargo box are detachably connected; the rear wheel is used to be installed on the frame body, and the front wheel is used to be installed on a side of the cargo box away from the frame body.

[0009] In an embodiment, the frame body comprises an upper tube, a hanger and a vertical tube, the upper tube and the hanger are connected with the vertical tube respectively, the upper tube is provided with the first connecting part at one end away from the vertical tube, and the hanger is provided with the second connecting part at one end away from the vertical tube; the box comprises an upper frame, a lower frame and a box body, the upper frame and the lower frame are arranged at the upper and lower ends of the box body respectively, the first matching part is arranged on the upper frame, and the second matching part is arranged on the lower frame.

[0010] In an embodiment, the first connecting part is detachably connected with the first matching part through a first fastener; the first connecting part is provided with a first mounting hole, and the first fastener passes through the first mounting hole to connect the first matching part.

[0011] Alternatively, the first matching part of the upper frame is provided with a second mounting hole, and the first fastener passes through the second mounting hole to connect the first connecting part.

[0012] Alternatively, the first connecting part and the first matching part are respectively provided with a first mounting hole and a second mounting hole, and the first fastener is sequentially arranged in the first mounting hole and the second mounting hole to connect the frame body and the box.

[0013] In an embodiment, the second connecting part is detachably connected with the second matching part through a second fastener; the second connecting part is provided with a third mounting hole, and the second fastener passes through the third mounting hole to connect the second matching part.

[0014] Alternatively, the lower frame is provided with a fourth mounting hole, and the second fastener passes through the fourth mounting hole to connect the second connecting part.

[0015] Alternatively, the second connecting part and the second matching part are respectively provided with a third mounting hole and a fourth mounting hole, and the second fastener is sequentially arranged in the third mounting hole and the fourth mounting hole to connect the hanger and the lower frame.

[0016] In an embodiment, one of the first connecting part and the first matching part is provided with a first positioning groove, and the other is provided with a first limiting block, the first limiting block is inserted into the first positioning groove to positionally connect the upper tube and the upper frame.

[0017] And / or, one of the second connecting part and the second matching part is provided with a second positioning groove, and the other is provided with a second limiting block, the second limiting block is limited in the second positioning groove to positionally connect the hanger and the lower frame.

[0018] In an embodiment, the hanger is used for installing a motor, the second connecting part is arranged at one end of the hanger for connecting with the box, and a third connecting part is arranged at the other end of the hanger away from the second connecting part, the third connecting part is provided with a plug-in structure, and the plug-in structure is used for connecting with the stand pipe.

[0019] In an embodiment, the first connecting part comprises a cutting groove and a second through hole for connecting with the frame, the cutting groove is arranged at one end of the first connecting part away from the hanger body and is arranged in a ring shape, and the second through hole is arranged in the first connecting part along the width direction of the hanger body.

[0020] In an embodiment, the frame assembly further comprises a head tube, the box or the frame body is further provided with a first sleeve and a second sleeve, the head tube is sequentially arranged in the first sleeve and the second sleeve, and one end of the head tube away from the bottom of the box is used for installing a handlebar.

[0021] In an embodiment, the frame assembly further comprises a battery arranged in the box, the frame body is further provided with a motor, a wiring hole is arranged through the second connecting part, the frame body is provided with a wiring channel, and the wiring hole and the wiring channel are used for electrically connecting the motor and the battery through a cable.

[0022] In an embodiment, the box has a box cavity with an upward opening, an upper frame is arranged at the opening of the box cavity, the upper frame is provided with a first mounting part and a second mounting part, the first mounting part and the second mounting part are arranged at both ends of the upper frame along the length direction of the box, the first mounting part is used for installing a first lamp group, and the second mounting part is used for installing a second lamp group.

[0023] In an embodiment, the upper frame is concave at both ends along the length direction of the box to form a first accommodating groove and a second accommodating groove, the first accommodating groove constitutes the first mounting part, and the second accommodating groove constitutes the second mounting part, the first accommodating groove is arranged in a long strip along the width direction of the box, and / or the number of the second accommodating grooves is plural, and the plural second accommodating grooves are arranged in intervals along the width direction of the box body.

[0024] In an embodiment, the first lamp group comprises a lamp holder, a lamp strip, a lamp cover and a lamp shade, the lamp holder has a mounting cavity for mounting the lamp strip, the lamp cover is used for encapsulating the mounting cavity, the lamp holder is mounted in the first accommodating groove, and the lamp shade is used for encapsulating the first accommodating groove.

[0025] The second lamp group comprises a lamp holder, a lamp strip, a lamp cover and a lamp shade, the lamp holder has a mounting cavity for mounting the lamp strip, the lamp cover is used for encapsulating the mounting cavity, the lamp holder is mounted in the second accommodating groove, and the lamp shade is used for encapsulating the second accommodating groove.

[0026] In an embodiment, a slot structure is arranged on the circumferential cavity wall of the mounting cavity, the slot structure and the circumferential wall of the mounting cavity form a slot with an opening facing the cavity opening of the mounting cavity, and a protruding piece is arranged on the circumferential side of the lamp cover facing the lamp holder.

[0027] In an embodiment, a protruding structure is arranged on the side of the cavity bottom facing the cavity opening, and a mounting hole is arranged on the lamp strip and corresponds to the protruding structure.

[0028] In an embodiment, the frame assembly further comprises a transmission wheel, a linkage wheel, a belt, a tensioning wheel and a tensioning structure arranged on the frame body, the belt is arranged around the transmission wheel and the linkage wheel, the tensioning wheel is connected to the frame body through the tensioning structure, the tensioning wheel is used for pressing and rotatingly connecting the belt, and the tensioning structure is used for adjusting the tightness of the belt.

[0029] In an embodiment, the tensioning structure comprises:

[0030] A connecting piece comprising a first connecting segment and a second connecting segment, the first connecting segment and the second connecting segment are fixedly connected, the first connecting segment is used for connecting with the belt, and the second connecting segment is used for connecting with the frame body.

[0031] A pressing piece detachably arranged on the second connecting segment.

[0032] An elastic piece sleeved on the second connecting segment, the elastic piece comprises a first torsion arm and a second torsion arm, the first torsion arm is in position abutment with the frame body, the second torsion arm is in position abutment with the pressing piece, and the elastic piece can be used for buffering the vibration force of the belt transmitted to the frame body.

[0033] In an embodiment, the end of the second connecting segment away from the first connecting segment is provided with at least one avoiding slot, the avoiding slot is arranged along the length direction of the second connecting segment, the pressing piece is provided with a mounting slot, and the mounting slot is adapted to the end of the second connecting segment away from the first connecting segment.

[0034] In an embodiment, the end of the second connecting segment provided with the avoiding slot is further provided with a fixing hole, the fixing hole is arranged perpendicular to the length direction of the second connecting segment, the pressing piece is provided with a positioning hole, the positioning hole is arranged through the cutting slot, and the positioning hole corresponds to the fixing hole.

[0035] In an embodiment, the second connecting section is provided with at least one protrusion near the outer periphery of the end of the first connecting section, and the first connecting section is provided with a mounting groove near the end of the second connecting section, the mounting groove being adapted to the protrusion;

[0036] And / or, the elastic member is arranged between the pressing member and the first connecting section, and the elastic member is exposed outside the pressing member;

[0037] And / or, the pressing member comprises a fixed portion and an abutting portion, the connecting portion is used to connect with the second connecting section, the abutting portion is provided with an abutting surface used to abut against the second torsion arm, and the abutting surface is arranged obliquely along the extension direction of the second torsion arm;

[0038] And / or, the belt tensioner further comprises a bushing, and the bushing is arranged between the second connecting section and the elastic member.

[0039] In an embodiment, the vehicle frame assembly further comprises a steering device, and the steering device comprises a first steering disc, a second steering disc and a wire harness adjusting structure, the first steering disc and the second steering disc are rotatably arranged on the vehicle frame body and are arranged at intervals, the wire harness adjusting structure is connected with the first steering disc and the second steering disc respectively, and the wire harness adjusting structure is arranged between the first steering disc and the second steering disc.

[0040] In an embodiment, the wire harness adjusting structure comprises:

[0041] a plurality of traction lines;

[0042] a first adjusting assembly, comprising an adjusting seat and a plurality of adjusting members, the adjusting seat is provided with a plurality of limiting holes, and one adjusting member is rotatably arranged in one limiting hole and connected with one traction line, and each adjusting member is used to adjust the tightness of each traction line;

[0043] a second adjusting assembly, the second adjusting assembly is used to drive the adjusting seat to move and drive a plurality of adjusting members to move, so as to simultaneously adjust the tightness of a plurality of traction lines.

[0044] In an embodiment, the second adjusting assembly comprises an adjusting portion and a positioning portion, the adjusting portion is connected with the adjusting seat, and the positioning portion is rotatably connected with the adjusting portion.

[0045] And / or, the adjusting seat is further provided with a wire passing groove, and the wire passing groove is arranged in communication with the limiting hole;

[0046] And / or, the adjusting seat further comprises a guide part, the frame assembly is provided with a guide column, the guide part is in sliding connection with the guide column, and a locking piece is detachably arranged on the guide column and can abut against the guide part.

[0047] In an embodiment, the turning device further comprises a first limiter, which is detachably arranged on the frame assembly and is arranged in space with the adjusting seat, and a first wire passing groove is arranged on the first limiter, and the first wire passing groove is used for passing the traction line.

[0048] The application further provides a double-wheeled vehicle comprising the frame assembly in any of the foregoing embodiments.

[0049] The technical scheme of the application can save space and improve transportation efficiency by splitting the frame assembly of the double-wheeled vehicle into a frame main body and a cargo box for transportation. Specifically, the frame assembly comprises a frame main body and a cargo box, the frame main body is provided with a first connecting part and a second connecting part, the end part of the cargo box is provided with a first matching part and a second matching part, the first connecting part is detachably connected with the first matching part, and the second connecting part is detachably connected with the second matching part, so that the frame main body and the cargo box can be assembled or separated. The double-wheeled vehicle further comprises front wheels and rear wheels, the rear wheels are mounted on the frame main body, and the front wheels are arranged on the side of the cargo box away from the frame main body. The front and rear wheels are also detachable structures, so that the double-wheeled vehicle can be split into four parts, i.e., the front wheels, the rear wheels, the frame main body and the cargo box. When transporting, each part can be packed separately, and then assembled after arriving at the destination. When transporting, the storage space can be planned according to the individual parts, the space utilization rate can be improved as much as possible, the part transportation cost can be reduced, and the transportation efficiency can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0050] In order to more clearly illustrate the technical scheme in the embodiments of the application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings shown.

[0051] Fig. 1 is a structural schematic view of an embodiment of the frame assembly provided by the application;

[0052] Fig. 2 is a split schematic view of an embodiment of the frame assembly provided by the application;

[0053] Fig. 3 is a front view of an embodiment of the frame assembly provided by the application;

[0054] Fig. 4 is a structural schematic view of the frame main body in an embodiment of the frame assembly provided by the application;

[0055] Fig. 5 is a schematic view of the structure of the box and the head tube in an embodiment of the frame assembly provided by the present application;

[0056] Fig. 6 is a schematic view of the split structure of the box, the upper frame and the lower frame in an embodiment of the frame assembly provided by the present application;

[0057] Fig. 7 is a schematic view of the structure of the hanger in an embodiment of the frame assembly provided by the present application;

[0058] Fig. 8 is a schematic view of the structure of the box in an embodiment of the frame assembly provided by the present application;

[0059] Fig. 9 is a schematic view of the split structure of the box in an embodiment of the frame assembly provided by the present application;

[0060] Fig. 10 is a schematic view of the structure of the lamp holder in an embodiment of the frame assembly provided by the present application;

[0061] Fig. 11 is a schematic view of the split structure of the first lamp group in an embodiment of the frame assembly provided by the present application;

[0062] Fig. 12 is a schematic view of the structure of the rear fork, the tensioning structure and the transmission assembly in an embodiment of the frame assembly provided by the present application;

[0063] Fig. 13 is an exploded view of the tensioning structure in an embodiment of the frame assembly provided by the present application;

[0064] Fig. 14 is a partial schematic view of the tensioning structure in an embodiment of the frame assembly provided by the present application;

[0065] Fig. 15 is a schematic view of the assembly structure of the tensioning structure and the tensioning wheel in an embodiment of the frame assembly provided by the present application;

[0066] Fig. 16 is a schematic view of the structure of the first connecting section in an embodiment of the frame assembly provided by the present application;

[0067] Fig. 17 is a partial schematic view of the second connecting section in an embodiment of the frame assembly provided by the present application;

[0068] Fig. 18 is a schematic view of the structure of the pressing member in an embodiment of the frame assembly provided by the present application;

[0069] Fig. 19 is a schematic view of the structure of the mounting seat in an embodiment of the frame assembly provided by the present application;

[0070] Fig. 20 is a schematic view of the structure of the steering device in an embodiment of the frame assembly provided by the present application;

[0071] Fig. 21 is an enlarged view of position A in Fig. 20;

[0072] Fig. 22 is a schematic view of the structure of the adjusting member in an embodiment of the frame assembly provided by the present application;

[0073] Figure 23 is a schematic view of an adjustment seat in an embodiment of the frame assembly provided by the present application.

[0074] BRIEF DESCRIPTION OF THE DRAWINGS: 100, frame assembly; 110, frame body; 111, first connecting part; 111a, first mounting hole; 111b, first notch; 111c, first limiting block; 112, second connecting part; 112a, third mounting hole; 112b, second notch; 112c, second limiting block; 113, upper tube; 1131, rear seat; 114, hanger; 114a, wire channel; 1141, third connecting part; 1141a, cutting groove; 1141b, through hole; 1142, cover; 115, vertical tube; 116, head tube; 117, rear fork; 1171, upper frame; 1172, lower frame; 1173, mounting seat; 1174, stop part; 120, cargo box; 121, first matching part; 121a, second mounting hole; 121b, first positioning groove; 122, second matching part; 122a, fourth mounting hole; 122b, wire hole; 122c, second positioning groove; 123, upper edge frame; 1231, first accommodating groove; 1232, second accommodating groove; 124, lower edge frame; 125, box body; 125a, cargo cavity; 126, first sleeve; 127, second sleeve; 130, first lamp group; 131, lamp holder; 1311, mounting cavity; 1312, groove structure; 132, lamp strip; 133, lamp cover; 1331, protruding piece; 134, lamp shade; 140, second lamp group; 150, battery; 160, motor; 170, auxiliary wheel; 180, guide column; 181, locking piece; 200, tensioning structure; 210, connecting piece; 211, first connecting section; 2111, first fixing part; 2212, bending part; 2113, second fixing part; 212, second connecting section; 2121, fixing hole; 2122, avoiding groove; 2123, protruding part; 220, tensioning wheel; 230, elastic piece; 231, first torsion arm; 232, second torsion arm; 240, pressing piece; 241, fixing part; 2411, mounting groove; 2412, positioning hole; 242, abutting part; 2421, abutting surface; 250, bushing; 300, transmission assembly; 310, transmission wheel; 320, belt; 330, linkage wheel; 400, steering device; 410, first steering disc; 420, second steering disc; 421, traction wire; 430, first adjustment assembly; 431, adjustment piece; 4311, screw rod; 4312, second fastening nut; 4313, through hole; 432, adjustment seat; 4321, limiting hole; 4322, wire passing groove; 4323, guide part; 4324, connecting hole; 440, second adjustment assembly; 441, adjustment part; 442, positioning part; 443, first fastening nut; 450, first limiter; 460, second limiter; 470, third limiter; 480, protective wire sleeve.

[0075] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0076] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0077] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0078] In addition, if the embodiments of the present application involve descriptions of “first”, “second”, etc., the descriptions of “first”, “second”, etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by “first” and “second” can explicitly or implicitly include at least one of the features. In addition, “and / or” or “and / or” appearing throughout the text means that the three parallel schemes include A scheme or B scheme, or A and B are satisfied at the same time. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of a person of ordinary skill in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope of the present application.

[0079] The present application provides a vehicle frame assembly.

[0080] Please refer to FIG. 1 to FIG. 6, in an embodiment of the present application, the frame assembly 100 comprises a frame body 110 and a cargo box 120, the frame body 110 is provided with a first connecting part 111 and a second connecting part 112, the cargo box 120 is provided with a first matching part 121 and a second matching part 122 at the end, the first connecting part 111 and the first matching part 121 are detachably connected, the second connecting part 112 and the second matching part 122 are detachably connected, so that the frame body 110 and the cargo box 120 can be assembled or separated. The double-wheeled vehicle further comprises a front wheel and a rear wheel, the rear wheel is mounted on the frame body 110, the front wheel is arranged on the side of the cargo box 120 away from the frame body 110, and the front and rear wheels are also detachable structures, so that the double-wheeled vehicle can be divided into four parts of the front wheel, the rear wheel, the frame body 110 and the cargo box 120, only the parts need to be packed separately during transportation, and the parts can be assembled after arriving at the destination, the storage space can be planned for the individual parts during transportation, the space utilization rate is improved as much as possible, the part transportation cost is reduced, and the transportation efficiency is improved, in addition, the structure can save space, is easy to install, ensures the connection strength, and is beneficial to improving the service life of the double-wheeled vehicle.

[0081] As shown in FIG. 2 to FIG. 6, in an embodiment of the present application, the frame body 110 comprises an upper pipe 113, a hanger 114 and a vertical pipe 115, the middle part of the upper pipe 113 is provided with a through hole, the upper end of the vertical pipe 115 is arranged in the through hole, the lower end of the vertical pipe 115 is connected with one end of the hanger 114, the end of the upper pipe 113 and the hanger 114 away from the vertical pipe 115 extends to the direction close to the cargo box 120, the first connecting part 111 is arranged on the upper pipe 113, the second connecting part 112 is arranged on the hanger 114, the cargo box 120 comprises an upper frame 123 and a lower frame 124, the box body 125 is arranged in the middle of the upper frame 123 and the lower frame 124 to form a cargo cavity, which is used for loading goods, the first matching part 121 is arranged on the upper frame 123 corresponding to the first connecting part 111, and the second matching part 122 is arranged on the lower frame 124 corresponding to the second connecting part 112.

[0082] As shown in FIGS. 4 and 5, in an embodiment of the present application, the first connecting portion 111 is connected to the first matching portion 121 by a first fastener. If the first fastener is a screw, a first mounting hole 111a is provided through the first connecting portion 111, and a second mounting hole 121a is provided through the first matching portion 121. The second mounting hole 121a is a threaded hole, and the first fastener is screwed into the second mounting hole 121a through the first mounting hole 111a to connect the first connecting portion 111 and the first matching portion 121. If the first mounting hole 111a is provided as a threaded hole on the first connecting portion 111, and the second mounting hole 121a is provided through the first matching portion 121, the first fastener can also be connected to the first mounting hole 111a through the second mounting hole 121a. If the first mounting hole 111a and the second mounting hole 121a are both provided as through holes, the first fastener can be a bolt, and the bolt is connected to a nut by being inserted through the first mounting hole 111a and the second mounting hole 121a to lock the first connecting portion 111 and the first matching portion 121.

[0083] As shown in FIGS. 4 and 5, in an embodiment of the present application, the second connecting portion 112 is connected to the second matching portion 122 by a second fastener. If the second fastener is a screw, a third mounting hole 112a is provided through the second connecting portion 112, and a fourth mounting hole 122a is provided through the second matching portion 122. The fourth mounting hole 122a is a threaded hole, and the second fastener is screwed into the fourth mounting hole 122a through the third mounting hole 112a to connect the second connecting portion 112 and the second matching portion 122. If the third mounting hole 112a is provided as a threaded hole on the second connecting portion 112, and the fourth mounting hole 122a is provided through the second matching portion 122, the second fastener can also be connected to the third mounting hole 112a through the fourth mounting hole 122a.

[0084] If the third mounting hole 112a and the fourth mounting hole 122a are both provided as through holes, the second fastener can be a bolt, and the bolt is connected to a nut by being inserted through the third mounting hole 112a and the fourth mounting hole 122a to lock the second connecting portion 112 and the second matching portion 122.

[0085] It should be noted that the first fastener and the second fastener can be bolts, screws, or other components, which can be selected according to the required structure, and are not limited herein. In addition, the vertical pipe 115, the upper pipe 113, and the hanger 114 can be connected by welding or other methods to ensure the structural strength of the frame main body 110. The first fastener and the second fastener are provided in a detachable structure to enable the frame main body 110 and the cargo box 120 to be connected or separated.

[0086] As shown in FIG. 4 and FIG. 5, in an embodiment of the present application, the first connecting part 111 is protruded on the side facing the cargo box 120 to form a first limiting block 111c, and the first matching part 121 is provided with a first positioning groove 121b corresponding to the first limiting block 111c, the first limiting block 111c is embedded into the first positioning groove 121b to position and connect the upper tube 113 and the upper frame 123, the first mounting hole 111a is provided through the first limiting block 111c, and the second mounting hole 121a is provided through the bottom wall of the first positioning groove 121b, so that the connection of the first connecting part 111 and the first matching part 121 is more compact, and loosening is avoided.

[0087] Further, the second connecting part 112 is protruded on the side facing the cargo box 120 to form a second limiting block 112c, and the second matching part 122 is provided with a second positioning groove 122c corresponding to the second limiting block 112c, the second limiting block 112c is embedded into the second positioning groove 122c to position and connect the hanger 114 and the lower frame 124, the third mounting hole 112a is provided through the second limiting block 112c, and the fourth mounting hole 122a is provided through the bottom wall of the second positioning groove 122c. Of course, in some other embodiments of the present application, the first limiting block 111c can also be provided on the first matching part 121, the first connecting part 111 is provided with the first positioning groove 121b correspondingly, and the second limiting block 112c can also be provided on the second matching part 122, the second connecting part 112 is provided with the second positioning groove 122c correspondingly, so as to realize the positioning connection of the upper tube 113 and the upper frame 123, and the hanger 114 and the lower frame 124, which is not limited here.

[0088] As shown in FIG. 5 and FIG. 6, in an embodiment of the present application, the frame assembly 100 further comprises a head tube 116. Specifically, the cargo box 120 or the frame body 110 is provided with a first sleeve 126 and a second sleeve 127, the inner diameters of the first sleeve 126 and the second sleeve 127 are greater than or equal to the diameter of the head tube 116, the bottom end of the head tube 116 is sequentially installed on the cargo box 120 or the frame body 110 through the first sleeve 126 and the second sleeve 127, and the upper end of the head tube 116 is used to install handlebars or the like. It can be understood that the head tube 116 is fixed by the two sleeves, which can improve the structural strength of the vehicle body. The first sleeve 126 and the second sleeve 127 are arranged on the cargo box 120, the first sleeve 126 is arranged on the upper frame 123, the second sleeve 127 is arranged on the lower frame 124 and coincides with the axis of the first sleeve 126; in some other embodiments of the present application, the first sleeve 126 and the second sleeve 127 are arranged on the frame body 110, the first sleeve 126 is arranged on the first connecting part 111, the second sleeve 127 is arranged on the second connecting part 112 and coincides with the axis of the first sleeve 126, and is used to install the head tube 116, and the specific structure can be set according to product requirements.

[0089] As shown in FIG. 5 and FIG. 6, in an embodiment of the present application, the first sleeve 126 is arranged at the first matching part 121 of the upper frame 123, and the outer wall of the first sleeve 126 is connected with the upper frame 123, the side of the first sleeve 126 away from the upper frame 123 extends towards the first connecting part 111, the first connecting part 111 is recessed to form a first notch 111b corresponding to the first sleeve 126, and the first sleeve 126 is clamped in the first notch 111b; the second sleeve 127 is arranged at the second matching part 122 of the lower frame 124, and the outer wall of the second sleeve 127 is connected with the lower frame 124, the side of the second sleeve 127 away from the lower frame 124 extends towards the second connecting part 112, the second connecting part 112 is recessed to form a second notch 112b corresponding to the second sleeve 127, and the second sleeve 127 is clamped in the second notch 112b. The head tube 116 is arranged in the first sleeve 126 and the second sleeve 127, and is used for controlling the front wheel on the front side of the cargo box 120. By arranging the first notch 111b and the second notch 112b on the first connecting part 111 and the second connecting part 112 respectively, and clamping and connecting with the first matching part 121 and the second matching part 122, the connection tightness can be improved, and the appearance of the vehicle body is more beautiful.

[0090] As shown in FIG. 4 and FIG. 5, in an embodiment of the present application, the first fastener is a screw and the number of the first fastener is multiple, the first connecting part 111 is provided with at least one first mounting hole 111a on both sides of the first notch 111b, the first matching part 121 is provided with at least one second mounting hole 121a penetrating through both sides of the first sleeve 126, the first mounting hole 111a is a threaded hole, two first fasteners are respectively screwed into the first mounting hole 111a through the two second mounting holes 121a, so that the first connecting part 111 and the first matching part 121 form at least two connecting points, and the two connecting points are arranged on opposite sides of the first sleeve 126, the first sleeve 126 is clamped into the first notch 111b so that the first mounting holes 111a on both ends of the first connecting part 111 are aligned with the second mounting holes 121a on the first matching part 121, which plays a role of positioning and installation, and the at least two connecting points can ensure the connection strength of the upper tube 113 and the upper frame 123, and improve the safety.

[0091] Further, the second fastener is a bolt and is provided in plurality, the second connecting portion 112 is provided with at least one third mounting hole 112a on both sides of the second gap 112b, the second matching portion 122 is provided with at least one fourth mounting hole 122a on both sides of the second sleeve 127, and the plurality of second fasteners are respectively arranged in the third mounting hole 112a and the fourth mounting hole 122a, so that the second connecting portion 112 and the second matching portion 122 form at least two connection points, and the two connection points are respectively arranged on the opposite sides of the second sleeve 127. The second sleeve 127 is clamped into the second gap 112b, so that the third mounting hole 112a at both ends of the second connecting portion 112 is aligned with the fourth mounting hole 122a on the second matching portion 122, thereby playing a role of positioning and installation. The at least two connection points can ensure the connection strength of the hanger 114 and the lower frame 124, and further improve the safety.

[0092] It should be noted that, considering the strength of the vehicle body, two third mounting holes 112a are arranged on both sides of the second gap 112b in the embodiment to install four second fasteners for locking. In some other embodiments of the application, the number of first fasteners and second fasteners and the structure of mounting holes are not limited.

[0093] As shown in FIGS. 4, 5 and 6, in an embodiment of the application, the frame assembly 100 further comprises a battery 200, a motor 210, a rear fork 117 and a shock spring. The rear fork 117 is connected with the stand pipe 115 for mounting a rear wheel. One end of the rear fork 117 close to the stand pipe 115 is connected with one end of the shock spring, and the other end of the shock spring away from the rear fork 117 is rotationally connected with the upper pipe 113. The motor 210 is installed on the hanger 114 close to one end of the stand pipe 115, and is connected with the rear wheel through a hinge or a belt and the like. The motor 210 is used to drive the rear wheel to rotate after being powered on, so as to drive the vehicle body to move.

[0094] The inside hollow of the hanger 114 forms a wire channel 114a, the second connecting part 112 of the lower frame 124 is provided with a wire hole 122b, the battery 200 is arranged in the box 120, the frame assembly 100 further comprises a cable, one end of the cable is connected with the battery 200, the other end of the cable passes through the wire hole 122b and enters the wire channel 114a of the hanger 114 and is connected with the motor 210, for supplying power to the motor 210, in addition to the electric drive, the motor 210 is further provided with a rotating shaft, which is used for installing a pedal, in the case of insufficient power of the battery 200, the driver can ride through the pedal, which can cope with different use scenarios. In addition to the box 120, the upper pipe 113 is further provided with a rear seat 1131 away from the box 120, the rear seat 1131 is located above the rear wheel, which can be used for carrying people or binding goods, so as to increase the load. The bottom of the box 120 is further provided with an auxiliary wheel 150, for assisting the support of the frame assembly 100, preventing the vehicle from tilting or even overturning during driving, and avoiding damage to the goods in the box 120.

[0095] In an embodiment, as shown in Figure 7, in order to make the hanger 114 also convenient to install with the frame, in this embodiment, the third connecting part 1141 is provided with a plug-in structure, the plug-in structure is provided with a cutting groove 1141a, which is used for plug-in with the lower end of the vertical pipe 115, so that after the third connecting part 1141 is inserted into the vertical pipe 115, the two can be fixedly connected by welding.

[0096] Further, the through hole 1141b is arranged in the middle part of the third connecting part 1141, the through hole 1141b penetrates the third connecting part 1141 along the width direction of the hanger body 110, the through hole 1141b is mainly used for connecting shaft or fastener to pass through the through hole 1141b and the rear shock absorber when the rear shock absorber is installed in the frame, and the two are fixedly connected, which can effectively improve the connection between the third connecting part 1141 and the frame. Further, the hanger 114 is further provided with a machine cover 1142, which is used for connecting with the hanger 114 to form an installation space for installing the motor 160.

[0097] Please refer to FIG. 1 and FIG. 8, in an embodiment of the present application, the cargo box 120 is detachably arranged on the frame assembly 100 of the double-wheeled vehicle, in order to make the double-wheeled vehicle have the state of prompting others when riding, therefore, in the embodiment, the cargo box 120 includes a box body 125 and an upper frame 123, the cargo box 120 has an opening upward cargo cavity 125a, the cargo cavity 125a can be used to place articles, or can be used as a baby seat, and the upper frame 123 is detachably arranged at the opening of the cargo cavity 125a, the upper frame 123 can be detachably mounted on the opening of the cargo cavity 125a by fasteners, or can be mounted on the opening of the cargo cavity 125a by clamping or inserting, or can be arranged on the opening of the cargo cavity 125a by adhesion, which is not limited here.

[0098] In order to facilitate the installation of the first lamp group 130 and the second lamp group 140 which have the prompting or warning effect, in the embodiment, the first mounting portion and the second mounting portion are arranged on the upper frame 123, the first mounting portion and the second mounting portion are arranged at both ends of the upper frame 123 along the length direction of the box body 125, it is worth mentioning that the length direction here refers to the direction defined as the length direction when the box body 125 is mounted on the double-wheeled vehicle, which is consistent with the direction from the rear wheel to the front wheel of the double-wheeled vehicle, the first mounting portion is used to mount the first lamp group 130, and the second mounting portion is used to mount the second lamp group 140.

[0099] The technical solution of the present application arranges the first mounting portion and the second mounting portion at both ends of the upper frame 123 along the length direction of the box body 125, and mounts the first lamp group 130 on the first mounting portion and the second lamp group 140 on the second mounting portion, and the first lamp group 130 can be a daytime running lamp or a turn signal lamp which has the prompting or warning effect, or can be an illuminating lamp which has the illuminating effect, and the second lamp group 140 can also be a daytime running lamp or a turn signal lamp which has the prompting or warning effect, or can be an illuminating lamp which has the illuminating effect, so such arrangement can make the user achieve the prompting or warning effect on others or vehicles by the first lamp group 130 and the second lamp group 140 arranged at both ends of the upper frame 123 of the box body 125 when riding the double-wheeled vehicle, thereby improving the riding safety of the rider, in addition, arranging the first lamp group 130 and the second lamp group 140 by the cargo box 120 can save space and improve the aesthetics of the double-wheeled vehicle, and the hidden structure can avoid damage to the lamp group in some collision scenarios.

[0100] Specifically, in the present embodiment, as shown in FIG. 9, the upper frame 123 is concavely provided at both ends along the length direction of the box body 125 to form a first accommodating groove 1231 and a second accommodating groove 1232, the first accommodating groove 1231 constitutes a first mounting portion, and the second accommodating groove 1232 constitutes a second mounting portion. In the present embodiment, the first mounting portion and the second mounting portion are the first accommodating groove 1231 and the second accommodating groove 1232 concavely provided at both ends of the upper frame 123 along the length direction of the box body 125, the first accommodating groove 1231 and the second accommodating groove 1232 can be integrally formed with the upper frame 123 during die casting, and the use of the first accommodating groove 1231 and the second accommodating groove 1232 as the first mounting portion and the second mounting portion can achieve protective covering of the first lamp group 130 and the second lamp group 140 mounted on the upper frame 123, thereby prolonging the service life of the first lamp group 130 and the second lamp group 140.

[0101] More specifically, as shown in FIG. 9, the first accommodating groove 1231 is provided in a long strip along the width direction of the box body 125; and / or the second accommodating groove 1232 is provided in multiple numbers and is provided in intervals along the width direction of the box body 125. In the present embodiment, the first accommodating groove 1231 is provided at one end of the upper frame 123 close to the front wheel of the bicycle, and the second accommodating groove 1232 is provided at one end of the upper frame 123 close to the rear wheel of the bicycle, wherein the first accommodating groove 1231 is provided in a long strip along the width direction of the box body 125, the width direction herein refers to the direction perpendicular to the above-mentioned length direction, and the long-strip-provided first accommodating groove 1231 can be provided with a long-strip first lamp group 130, so in the present embodiment, a daytime running lamp or an illuminating lamp can be provided in the first accommodating groove 1231 to play a prompting and warning role for oncoming pedestrians or vehicles when the user rides the bicycle, or to illuminate the road ahead at night.

[0102] In the present embodiment, the second accommodating groove 1232 is provided in two numbers, the two second accommodating grooves 1232 are provided at one end of the upper frame 123 close to the rear wheel of the bicycle and are located at the bending portion of the upper frame 123, since the second accommodating groove 1232 is provided in two numbers, the second lamp group 140 is also provided in two groups, in the present embodiment, a turn signal group can be provided in each of the two second accommodating grooves 1232, so that when the user turns the bicycle, the second lamp group 140 provided in the second accommodating groove 1232 can play a turn prompting or warning role for the rear pedestrians or vehicles, of course, in other embodiments, the second accommodating groove 1232 can be provided in more than two numbers to achieve the role of increasing prompting and warning.

[0103] In an embodiment, as shown in FIGS. 9, 10 and 11, the first lamp group 130 comprises a lamp holder 131, a lamp strip 132, a lamp strip 133 and a lamp cover 134, the lamp holder 131 has a mounting cavity 1311 for mounting the lamp strip 132, the lamp strip 133 is used to encapsulate the mounting cavity 1311, the lamp holder 131 is mounted in the first accommodating groove 1231, and the lamp cover 134 is used to encapsulate the first accommodating groove 1231; and / or the second lamp group 140 comprises a lamp holder 131, a lamp strip 132, a lamp strip 133 and a lamp cover 134, the lamp holder 131 has a mounting cavity 1311 for mounting the lamp strip 132, the lamp strip 133 is used to encapsulate the mounting cavity 1311, the lamp holder 131 is mounted in the second accommodating groove 1232, and the lamp cover 134 is used to encapsulate the second accommodating groove 1232. In this embodiment, the lamp strip 133 can be mounted in the lamp holder 131, the lamp holder 131 in the first accommodating groove 1231, the lamp cover 134 in the first accommodating groove 1231 or the lamp holder 131 by means of plug-in, snap-in, bonding or screwing, etc. In this embodiment, the second lamp group 140 can be provided in the same way as the first lamp group 130, and will not be described in detail here.

[0104] Specifically, as shown in FIG. 10, a slot structure 1312 is arranged on the circumferential cavity wall of the mounting cavity 1311, and the slot structure 1312 and the circumferential wall of the mounting cavity 1311 enclose a plug-in slot with an opening facing the cavity opening of the mounting cavity 1311; further referring to FIG. 11, a protruding piece 1331 is arranged on the circumferential side of the lamp strip 133 facing the lamp holder 131. In this embodiment, the circumferential cavity wall of the mounting cavity 1311 of the mounting seat is provided with a slot structure 1312, which encloses a plug-in slot with an opening facing the cavity opening of the mounting cavity 1311 with the circumferential wall of the mounting cavity 1311. The plug-in slot is a slot for plug-in.

[0105] As shown in FIG. 11, the circumferential side of the lamp strip 133 facing the lamp holder 131 is provided with a protruding piece 1331, which can be a protruding block, a protruding column or a protruding piece, and will not be limited here. The protruding piece 1331 is arranged one-to-one with the plug-in slot to enable the plug-in of the lamp strip 133 and the lamp holder 131, and to enable the abutment of the lamp strip 132 arranged therebetween when the lamp strip 133 and the lamp holder 131 are plugged in. In addition, the two ends of the lamp strip 133 are also provided with a structure piece for plug-in or snap-in of the lamp holder 131.

[0106] In an embodiment, the side of the cavity bottom of the mounting cavity 1311 facing the cavity opening is provided with a protruding structure; the lamp strip 132 is provided with mounting holes corresponding to the protruding structure. In this embodiment, the side of the cavity bottom of the mounting cavity 1311 facing the cavity opening is also provided with a protruding structure (not shown in the figure), which is consistent with the protruding piece 1331 in the above embodiment, and can be a protruding block, a protruding column or a protruding piece. The protruding structure is mainly used to correspond to the mounting holes provided on the lamp strip 132, and is mainly used to make the lamp strip 132 more stably mounted in the mounting cavity 1311 of the lamp holder 131.

[0107] In another embodiment, as shown in FIG. 11, the lamp holder 131 includes a seat body, and a plurality of grooves are provided on the outer circumferential side of the seat body along the width direction of the box body 125. The grooves can limit the insertion of the lamp strip 132 when the lamp strip 132 is installed. When the lamp holder 131 is installed on the upper frame 123, it can be inserted into the first receiving groove 1231 and the second receiving groove 1232. In addition, the seat body is also provided with screw holes for the screw members to pass through, so that the seat body can be detachably connected with the upper frame 123 through the screw members.

[0108] In an embodiment, as shown in FIG. 11, the number of lamp strips 132 is multiple, and the multiple lamp strips 132 are arranged in the first receiving groove 1231 and / or the second receiving groove 1232 along the width direction of the box body 120. In this embodiment, the lamp strip 132 is composed of multiple lamp strips 132, and each lamp strip 132 is provided with a mounting hole corresponding to the protruding structure in the above embodiment. The lamp strip 132 is arranged in multiple to facilitate the bending of the lamp strip 132 arranged in the lamp holder 131. Of course, in other embodiments, the lamp strip 132 can be a flexible lamp strip 132 arranged integrally, and therefore, the number of lamp strips 132 is not limited.

[0109] Referring to FIGS. 12-14, in an embodiment of the present application, the frame assembly 100 further comprises a transmission wheel 310, a connecting wheel 330, a belt 320, a tensioning wheel 220 and a tensioning mechanism 200 arranged on the frame body 110, the transmission wheel 310 and the connecting wheel 330 are arranged on the frame body 110 at intervals, the belt 320 is arranged around the transmission wheel 310 and the connecting wheel 330 for power transmission, the tensioning wheel 220 is connected to the frame body 110 through the tensioning mechanism 200, and the tensioning wheel 220 is used to compress and rotateally connect the belt 320 to adjust the tightness of the belt 320. By arranging the tensioning mechanism 200, the belt 320 can maintain appropriate tension, avoiding slack or slipping of the belt 320, so as to ensure that power can be efficiently and stably transmitted to the wheels, the tensioning mechanism 200 can keep the tension of the belt 320 constant, avoiding vibration or abnormal noise caused by uneven tightness during operation, making the vehicle run more smoothly and comfortably, and also reducing the load of the transmission system (such as the hub and the bearing), avoiding impact caused by slipping of the belt 320, and protecting the transmission parts from damage.

[0110] Referring to FIG. 13, in an embodiment of the present application, the tensioning mechanism 200 comprises a connecting piece 210, a compression piece 240 and an elastic piece 230, the connecting piece 210 comprises a first connecting section 211 and a second connecting section 212, the first connecting section 211 and the second connecting section 212 are fixedly connected, the first connecting section 211 is used to connect with the belt 320, and the second connecting section 212 is used to connect with the frame body 110; the compression piece 240 is detachably arranged on the second connecting section 212; the elastic piece 230 is sleeved on the second connecting section 212, the elastic piece 230 comprises a first torsion arm 231 and a second torsion arm 232, the first torsion arm 231 is limitedly abutted with the frame body 110, and the second torsion arm 232 is limitedly abutted with the compression piece 240, and the elastic piece 230 can be used to buffer the vibration force of the belt 320 transmitted to the frame body 110.

[0111] The technical solution of the present application installs the tensioning mechanism 200 on the frame body 110 by taking the connecting piece 210 as a fixed piece, and divides the connecting piece 210 into the first connecting section 211 and the second connecting section 212, which are fixedly connected, wherein the belt 320 is arranged at one end of the first connecting section 211 away from the second connecting section 212, so that the belt 320 is connected to the frame body 110 through the tensioning mechanism 200. Since the tensioning mechanism 200 further comprises the elastic piece 230, when the belt 320 or the frame body 110 vibrates, the elastic piece 230 in the tensioning mechanism 200 can buffer the vibration force transmitted from the first connecting section 211 and the second connecting section 212, thereby achieving better vibration reduction effect. In the embodiment, the frame body 110 and the belt 320 can be any two objects or components or structural members that need to be connected, and are not limited here.

[0112] In an embodiment, as shown in FIG. 15, FIG. 17 and FIG. 18, the second connecting section 212 is provided with at least one avoiding slot 2122 at the end thereof away from the first connecting section 211, and the avoiding slot 2122 is opened along the length direction of the second connecting section 212; the pressing member 240 is provided with a mounting slot 2411, and the mounting slot 2411 is adapted to the end of the second connecting section 212 away from the first connecting section 211. Since the second connecting section 212 and the pressing member 240 are in transmission connection, in order to improve the connection stability of the pressing member 240 and the second connecting section 212, in the embodiment, at least one avoiding slot 2122 is provided at the end of the second connecting section 212 away from the first connecting section 211, and for the convenience of description, two avoiding slots 2122 are taken as an example for description.

[0113] The two avoiding slots 2122 are symmetrically arranged at the end of the second connecting section 212 away from the first connecting section 211 along the length direction of the second connecting section 212, and the mounting slot 2411 is opened on the pressing member 240 with reference to the end of the second connecting section 212 away from the first connecting section 211, and the mounting slot 2411 is adapted to the end of the second connecting section 212 away from the first connecting section 211. The end of the second connecting section 212 is flat due to the avoiding slot 2122, and the flat end can better realize the plug-in cooperation with the pressing member 240 and better realize the rotational transmission with the pressing member 240.

[0114] Further, the end of the second connecting section 212 provided with the avoiding slot 2122 is also provided with a fixing hole 2121, and the fixing hole 2121 is opened perpendicularly to the length direction of the second connecting section 212; the pressing member 240 is provided with a positioning hole 2412, and the positioning hole 2412 penetrates the avoiding slot 2122, and the positioning hole 2412 corresponds to the fixing hole 2121. In order to further improve the connection stability of the second connecting section 212 and the pressing member 240, the fixing hole 2121 is also opened on the end surface of the second connecting section 212 provided with the avoiding slot 2122, and the fixing hole 2121 is opened perpendicularly to the avoiding slot 2122, and at the same time, the positioning hole 2412 is opened on the pressing member 240.

[0115] When the end of the second connecting section 212 is inserted into the mounting slot 2411, the fixing hole 2121 corresponds to the positioning hole 2412, at this time, the pressing member 240 and the end of the second connecting section 212 can be fixedly connected by using a screwing member or a bolt member to pass through the fixing hole 2121 and the positioning hole 2412, and through such a setting, the end of the pressing member 240 and the second connecting section 212 are fixedly connected from two perpendicular directions, so that the rotational angle of the pressing member 240 and the second connecting section 212 is less when they are cooperatively connected in rotation.

[0116] In an embodiment, as shown in FIGS. 15-17, the second connecting segment 212 is provided with at least one protrusion 2123 near the end of the first connecting segment 211; the first connecting segment 211 is provided with a mounting groove 2411 near the end of the second connecting segment 212, and the mounting groove 2411 is adapted to the protrusion 2123. As in the above embodiment, in order to reduce the loss of the transmission angle after the connection of the second connecting segment 212 and the first connecting segment 211, and at the same time increase the connection of the second connecting segment 212 to the first connecting segment 211, therefore, in this embodiment, at least one protrusion 2123 is provided on the end of the second connecting segment 212 and the first connecting segment 211 for connection.

[0117] For the sake of illustration, as shown in FIGS. 17 and 18, one protrusion 2123 is taken as an example, which can be arranged in any direction along the circumference of the second connecting segment 212, which is not limited here. In order to make the connection of the second connecting segment 212 and the first connecting segment 211 better, therefore, a mounting groove 2411 is provided on the first connecting segment 211 with reference to the second fixing part 2113 and the protrusion 2123, which is used for inserting the end of the second connecting segment 212 provided with the protrusion 2123, in order to further improve the firmness between the second connecting segment 212 and the first connecting segment 211, therefore, a threaded groove is provided on the end of the second connecting segment 212 provided with the protrusion 2123 along the length direction.

[0118] When connecting the second connecting segment 212 and the first connecting segment 211, the end of the second connecting segment 212 provided with the protrusion 2123 can be inserted into the end of the first connecting segment 211 provided with the mounting groove 2411, and then the threaded connection between the mounting groove 2411 and the threaded groove of the second connecting segment 212 is achieved by the threaded member. Since the nut of the threaded member is larger than the diameter of the mounting groove 2411, the second connecting segment 212 and the first connecting segment 211 can be firmly connected, and through the provision of the protrusion 2123, as in the above embodiment, the loss of the rotation angle of the second connecting segment 212 and the first connecting segment 211 during transmission can also be reduced.

[0119] In an embodiment, as shown in FIGS. 12 and 14, the elastic member 230 is arranged between the pressing member 240 and the first connecting segment 211, and the elastic member 230 is exposed outside the pressing member 240. The elastic member 230 is arranged between the first connecting segment 211 and the pressing member 240, and the elastic member 230 is arranged close to the pressing member 240, and secondly, the elastic member 230 is exposed outside the pressing member 240, and the elastic member 230 can be that only the second torsion arm 232 is located inside the pressing member 240, and through such arrangement, the assembly of the tensioning structure 200 can be facilitated.

[0120] In an embodiment, as shown in FIG. 18, the pressing member 240 comprises a fixing portion 241 and an abutting portion 242, the fixing portion 241 is used to connect with the second connecting segment 212, and the abutting portion 242 has an abutting surface 2421 used to abut against the second torsion arm 232, and the abutting surface 2421 is arranged obliquely along the extending direction of the second torsion arm 232. In the embodiment, the pressing member 240 comprises the fixing portion 241 and the abutting portion 242, wherein the mounting groove 2411 and the positioning hole 2412 are arranged on the fixing portion 241, and the abutting portion 242 protrudes from the fixing portion 241, and the abutting portion 242 protrudes towards the elastic member 230. In order to make the abutting portion 242 better abut against the second torsion arm 232 of the elastic member 230, the abutting portion 242 is arranged with an abutting surface 2421 which is arranged obliquely downwards along the direction from the fixing portion 241 to the abutting portion 242, so that the abutting surface 2421 can increase the contact area with the second torsion arm 232, and the abutting effect of the second torsion arm 232 and the abutting portion 242 is better.

[0121] In an embodiment, as shown in FIG. 15, the tensioning structure 200 further comprises a bushing 250 arranged between the second connecting segment 212 and the elastic member 230. Since the second connecting segment 212 is used to rotateally connect with the frame 200, and the elastic member 230 is consistent with the frame 200 and keeps a relative state, in order to make the second connecting segment 212 avoid affecting the elastic member 230 when rotating, or to make the elastic member 230 avoid affecting the second connecting segment 212 when rotating, the bushing 250 is arranged between the second connecting segment 212 and the elastic member 230, and the bushing 250 can reduce the influence of the two on each other.

[0122] In an embodiment, as shown in FIG. 12, the frame body 110 of the double-wheeled vehicle comprises an upper frame 1171, a lower frame 1172 and a transmission assembly 300 arranged on the lower frame 1172, wherein the transmission assembly 300 comprises a transmission wheel 310, a belt 320 and a linkage wheel 330, and the distance between the upper frame 1171 and the lower frame 1172 is arranged taperedly along the direction from the linkage wheel 330 to the transmission wheel 310, so that the first connecting segment 211 will not bump against the lower frame 1172 when rotating with the second connecting segment 212.

[0123] Therefore, in the embodiment, the first connecting section 211 comprises a first fixing part 2111, a bending part 2212 and a second fixing part 2113, wherein the first fixing part 2111 is used for detachable connection with the second connecting section 212, the second fixing part 2113 is used for rotatable connection with the tensioning wheel 220, and the bending part 2212 is used for connecting the first fixing part 2111 and the second fixing part 2113. The bending part 2212 is arranged along the extension direction of the second connecting section 212 from one end close to the first fixing part 2111 to the other end away from the first fixing part 2111. In this way, the first connecting section 211 can be effectively prevented from colliding with the lower frame 1172 when rotating with the second connecting section 212.

[0124] In an embodiment of the present application, as shown in FIG. 12 and FIG. 19, the frame assembly 100 further comprises a mounting seat 1173 arranged on the frame body 110. The mounting seat 1173 is provided with a through hole, and the second connecting section 212 is rotatably connected with the mounting seat 1173 by penetrating the through hole. The mounting seat 1173 comprises a stop part 1174 used for limiting abutment with the first torsion arm 231. In order to better install the second connecting section 212 on the frame body 110, the frame assembly 100 further comprises a mounting seat 1173 in the embodiment.

[0125] The mounting seat 1173 is arranged on the frame body 110. The mounting seat 1173 can be arranged integrally with the frame body 110 or detachably arranged with the frame body 110 by the connecting piece 210, which is not limited here. The mounting seat 1173 is provided with a through hole. When the second connecting section 212 is installed, the second connecting section 212 is rotatably connected with the mounting seat 1173 by penetrating the through hole. In order to facilitate limiting abutment of the first torsion arm 231 of the elastic member 230, the mounting seat 1173 is further provided with a stop part 1174. When the second connecting section 212 is rotatably connected with the mounting seat 1173 by penetrating the through hole, the first torsion arm 231 of the elastic member 230 sleeved on the outer periphery of the second connecting section 212 is limited and abuts against the stop part 1174.

[0126] Further, the mounting seat 1173 further comprises a bearing arranged in the through hole of the mounting seat 1173. The second connecting section 212 is rotatably connected with the mounting seat 1173 by penetrating the bearing. In order to improve the rotation stability between the mounting seat 1173 and the second connecting section 212 and make the rotation of the second connecting section 212 around the mounting seat 1173 more smooth, a bearing is arranged in the through hole of the mounting seat 1173 in the embodiment. The second connecting section 212 is rotatably connected with the mounting seat 1173 by penetrating the bearing. Through such arrangement, the rotatable connection effect of the second connecting section 212 and the mounting seat 1173 is better, more stable and smooth.

[0127] The application also provides a steering device 400, as shown in FIGS. 20-23, which is applied to a double-wheel vehicle including a frame assembly 100, the steering device 400 including a first steering disc 410, a second steering disc 420, and a wire harness adjusting structure, wherein the first steering disc 410 and the second steering disc 420 are rotatably arranged on the frame assembly 100 and are spaced apart, and the wire harness adjusting structure is arranged between the first steering disc 410 and the second steering disc 420. When the first steering disc 410 is rotatably connected with the handlebar, the first steering disc 410 will drive the second steering disc 420 to rotate synchronously through the wire harness adjusting structure, and then the second steering disc 420 will drive the front wheel to rotate synchronously, so as to achieve the steering transmission effect.

[0128] In an embodiment of the application, referring to FIGS. 20-23, the wire harness adjusting structure includes a first adjusting assembly 430, a second adjusting assembly 440, and a plurality of traction wires 421, and each traction wire 421 has two ends connected with the first steering disc 410 and the second steering disc 420, respectively. Since the length of the traction wire 421 will have a certain error during processing, the length of the traction wire 421 needs to be adjusted due to the length error when the traction wire 421 is put into use. In order to facilitate the length adjustment of the single traction wire 421, the first adjusting assembly 430 is arranged, and the first adjusting assembly 430 includes an adjusting seat 432 and at least two adjusting pieces 431, and one adjusting piece 431 is arranged on one traction wire 421, wherein the adjusting seat 432 is provided with at least two limiting holes 4321, and the limiting hole 4321 is used for threaded connection with the adjusting piece 431, so that the user can adjust the tension of the traction wire 421 through the threaded connection between the adjusting piece 431 and the limiting hole 4321.

[0129] When the traction wire 421 is arranged in multiple, if the tightness of the multiple traction wires 421 is different, the steering effect will be poor, and one of the traction wires 421 will have a greatly reduced service life due to being in a stressed state for a long time. However, the above-mentioned adjusting mode of adjusting the tightness of the single traction wire 421 will make the user need to repeat the same operation multiple times, which will cause extremely inconvenient operation.

[0130] In the technical solution, the second adjusting assembly 440 is further arranged on the frame assembly 100, and the second adjusting assembly 440 is connected with the adjusting seat 432. The second adjusting assembly 440 can drive the adjusting seat 432 to move and drive the plurality of adjusting members 431 to move, so as to simultaneously adjust the tightness of the plurality of traction lines 421. When the user adjusts the tightness of the plurality of traction lines 421, the user can simultaneously adjust the tightness of the plurality of traction lines 421 through the second adjusting assembly 440, and then adjust the tightness of each traction line 421 through the cooperation of the adjusting member 431 and the adjusting seat 432. It can be understood that, by arranging the first adjusting assembly 430 and the second adjusting assembly 440, the tightness of each traction line 421 is independently adjusted, the symmetry and balance of the wheel can be more accurately controlled, the deflection or instability is avoided, and the tightness of the traction line 421 is accurately adjusted, so that the wheel is more sensitive in response when steering, which helps to improve the accuracy of steering control and the stability when riding.

[0131] The technical solution of the present application adopts the cooperation of the first adjusting assembly 430 and the second adjusting assembly 440, so that the user can operate more conveniently when simultaneously adjusting the tightness of the plurality of traction lines 421, and can fine-tune the tightness of the traction line 421 through the adjusting member 431 arranged on the traction line 421 when the simultaneous adjustment of the tightness of the plurality of traction lines 421 is completed or only the tightness of the single traction line 421 needs to be accurately adjusted, so that the tightness of the traction line 421 is consistent with the tightness of the other traction lines 421.

[0132] Specifically, as shown in FIG. 21, the second adjusting assembly 440 includes an adjusting part 441 and a positioning part 442. The adjusting part 441 is connected with the adjusting seat 432, and the positioning part 442 is rotatably connected with the adjusting part 441. In the embodiment, the second adjusting assembly 440 includes the adjusting part 441 and the positioning part 442. The adjusting part 441 is used to be connected with the adjusting seat 432, and the positioning part 442 is rotatably connected with the adjusting part 441. In the embodiment, the adjusting part 441 can be rotatably connected with the adjusting seat 432, and the positioning part 442 can be a fixed nut. The adjusting part 441 is threadedly connected with the positioning part 442, so that the adjusting part 441 can rotate around the positioning part 442 as a fulcrum and drive the adjusting seat 432 to move.

[0133] In an embodiment, as shown in FIG. 21, the adjusting part 441 is threaded through the adjusting seat 432, and the positioning part 442 is rotationally connected with the part of the adjusting part 441 extending out of the adjusting seat 432. Different from the above embodiment, in this embodiment, the positioning part 442 is used as a limiting part to limit the movement of the adjusting part 441, so that the adjusting part 441 can only rotate. Specifically, the positioning part 442 is provided with a through hole for the adjusting part 441 to thread through, and the positioning part 442 further includes two pin members inserted into both ends of the through hole of the adjusting part 441, which are used to limit the movement of the adjusting part 441 along the depth direction of the through hole, so that the adjusting part 441 can only rotate in the through hole. Since the adjusting part 441 is threaded through the adjusting seat 432 and is threadedly connected with the adjusting seat 432, when the adjusting part 441 is limited to rotate in place by the positioning part 442, the adjusting seat 432 can be driven to move, thereby achieving the adjusting effect as described above.

[0134] In this embodiment, the positioning part 442 is rotationally connected with the part of the adjusting part 441 extending out of the adjusting seat 432, and in other embodiments, the positioning part 442 can also be arranged on the operation end of the adjusting part 441, as long as it can limit the movement of the adjusting part 441. Therefore, the position of the positioning part 442 is not limited.

[0135] In an embodiment, as shown in FIG. 21, the adjusting part 441 located on the side of the adjusting seat 432 away from the positioning part 442 is provided with a first fastening nut 443, which is threadedly connected with the adjusting part 431. After the user adjusts the tightness of the traction line 421 in the above manner, in order to keep the traction line 421 at the tightness, in this embodiment, a first fastening nut 443 is arranged on the side of the adjusting part 441 away from the positioning part 442, that is, on the side of the adjusting part 441 located on the side of the adjusting seat 432 away from the positioning part 442, and the first fastening nut 443 is threadedly connected with the adjusting part 441. The user can manually or by using a tool to tighten the first fastening nut 443 towards the adjusting seat 432, so that the first fastening nut 443 abuts against the adjusting seat 432, thereby stably keeping the adjusting seat 432 at the current position, so that the traction line 421 keeps the current tightness.

[0136] In an embodiment, as shown in FIG. 22, the adjusting part 431 includes a screw rod 4311, a second fastening nut 4312, and a through hole 4313. The through hole 4313 is used for the traction line 421 to thread through, the screw rod 4311 is used to be threadedly connected with the adjusting seat 432, and the second fastening nut 4312 is used to be tightened along the screw rod 4311 towards the adjusting seat 432 after the user completes the tightness adjustment of a single traction line 421 by using the screw rod 4311, so that the screw rod 4311 and the adjusting seat 432 keep relatively stable.

[0137] In an embodiment, as shown in FIG. 23, the adjusting seat 432 is further provided with a wire passing groove 4322, which is in communication with the limiting hole 4321. In order to facilitate the installation of the traction wire 421 and the adjusting member 431 in the limiting hole 4321, the wire passing groove 4322 is arranged on the adjusting seat 432 in this embodiment, which is in communication with the limiting hole 4321. The opening width of the wire passing groove 4322 is smaller than the diameter of the limiting hole 4321. The wire passing groove 4322 can be used to connect the traction wire 421 and the adjusting member 431 first, and then the traction wire 421 is extended into the limiting hole 4321 along the wire passing groove 4322, and then the adjusting member 431 is screwed into the limiting hole 4321. In this way, the traction wire 421 can be avoided to pass through the adjusting member 431 after being installed in the limiting hole 4321, and then the adjusting member 431 is screwed into the limiting hole 4321. Therefore, the installation efficiency of the traction wire 421 and the adjusting member 431 can be effectively improved by arranging the wire passing groove 4322 in this embodiment.

[0138] In an embodiment, as shown in FIG. 20, FIG. 21 and FIG. 23, the adjusting seat 432 further comprises a guide portion 4323, and the vehicle frame assembly 100 is further provided with a guide column 180, and the guide portion 4323 is in sliding connection with the guide column 180. In order to prevent the adjusting seat 432 from deviating when moving, the adjusting seat 432 further comprises the guide portion 4323 in this embodiment, which is in the form of an annular groove. In other embodiments, it can be in other forms. In order to make the guide portion 4323 have a guiding effect, the guide column 180 is further provided on the vehicle frame assembly 100 in this embodiment, which is in sliding connection with the guide portion 4323. When the adjusting seat 432 is driven to move by the second adjusting assembly 440, the adjusting seat 432 can move horizontally by the sliding cooperation of the guide portion 4323 and the guide column 180. The guide portion 4323 and the guide column 180 can effectively eliminate the deviation of the adjusting seat 432 when moving.

[0139] Further, the guide column 180 is detachably provided with a locking piece 181, and the locking piece 181 can abut against the guide piece. In order to keep the adjusting seat 432 stable after the tightness of the plurality of traction lines 421 is adjusted by the adjusting seat 432, and prevent the adjusting seat 432 from moving by itself to cause the tightness of the traction line 421 to change, in the embodiment, the locking piece 181 is detachably provided on the guide column 180. In the embodiment, the locking piece 181 is a bolt, and the locking piece 181 is threadedly connected with the guide column 180. Therefore, when the locking piece 181 is screwed into the guide column 180, the locking piece 181 can abut against the guide part 4323, and the guide part 4323 is positioned, so that the stability of the adjusting seat 432 after the adjustment is improved. In other embodiments, the locking piece 181 can be connected with the guide column 180 by insertion, which is not limited here.

[0140] In another embodiment, as shown in FIG. 20, the steering device 400 further comprises a first limiter 450, which is detachably provided on the frame assembly 100 and is spaced apart from the adjusting seat 432. The first limiter 450 is provided with a first wire passing groove for the traction line 421 to pass through. In order to make the traction line 421 more standardized during laying, in the embodiment, the first limiter 450 is detachably provided on the frame assembly 100 by a screwing piece and is spaced apart from the adjusting seat 432. The first limiter 450 is provided with a plurality of first wire passing grooves for the traction line 421 to pass through.

[0141] Further, as shown in FIG. 20, since the traction line 421 is provided with a plurality of traction lines in the embodiment, in order to prevent the traction line 421 from being wound around the first steering disc 410 and / or the second steering disc 420, in the embodiment, the second limiter 460 and the third limiter 470 are further provided. The second limiter 460 and the third limiter 470 are both provided with a second wire passing groove, so that the traction line 421 can be effectively prevented from being wound during transmission.

[0142] In an embodiment, as shown in FIG. 20, the first position limiter 450 and the adjusting seat 432 divide the traction line 421 into a first connecting section, an adjusting section and a second connecting section, the adjusting section being located between the first position limiter 450 and the adjusting seat 432; the steering device 400 further comprises a protective sleeve 480, the protective sleeve 480 being sleeved on the outer periphery of the first connecting section and the second connecting section. In order to facilitate the protection of the traction line 421, the protective sleeve 480 is therefore sleeved on the outer periphery of the traction line 421; in order to prevent the protective sleeve 480 from affecting the use of the first adjusting assembly 430 and the second adjusting assembly 440, the protective sleeve 480 is segmented and used on the outer periphery of the first connecting section and the second connecting section, which are distinguished with the first position limiter 450 and the adjusting seat 432 as reference.

[0143] The application also provides a double-wheeled vehicle, which comprises the frame assembly 100, the specific structure of which is referred to the above embodiments. Since the double-wheeled vehicle adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0144] The above is only an exemplary embodiment of the application, and does not limit the patent scope of the application. Any equivalent structural transformation, direct / indirect application in other related technical fields based on the technical concept of the application, and the content of the specification and drawings are included in the patent protection scope of the application.

Claims

1. A frame assembly for a two-wheeled vehicle, the two-wheeled vehicle comprising a front wheel and a rear wheel, characterized in that, The frame assembly comprises: a frame body, the frame body being provided with a first connecting portion and a second connecting portion; a cargo box, the cargo box being provided with a first matching portion and a second matching portion arranged at intervals, the first connecting portion being detachably connected with the first matching portion, and the second connecting portion being detachably connected with the second matching portion, so that the frame body and the cargo box are detachably connected; the rear wheel is arranged on the frame body, and the front wheel is arranged on a side of the cargo box away from the frame body.

2. The frame assembly of claim 1, wherein, The frame body comprises an upper tube, a hanger and a vertical tube, the upper tube and the hanger being connected with the vertical tube respectively, the upper tube being provided at an end away from the vertical tube with the first connecting portion, and the hanger being provided at an end away from the vertical tube with the second connecting portion; the cargo box comprises an upper frame, a lower frame and a box body, the upper frame and the lower frame being arranged on the upper and lower ends of the box body respectively, the upper frame being provided with the first matching portion, and the lower frame being provided with the second matching portion.

3. The frame assembly of claim 2, wherein, The first connecting portion is detachably connected with the first matching portion through a first fastener; the first connecting portion is provided with a first mounting hole, and the first fastener passes through the first mounting hole to connect the first matching portion; Alternatively, the first matching portion of the upper frame is provided with a second mounting hole, and the first fastener passes through the second mounting hole to connect the first connecting portion; Alternatively, the first connecting portion and the first matching portion are respectively provided with a first mounting hole and a second mounting hole, and the first fastener passes through the first mounting hole and the second mounting hole in sequence to connect the frame body and the cargo box.

4. The frame assembly of claim 2, wherein, The second connecting portion is detachably connected with the second matching portion through a second fastener; the second connecting portion is provided with a third mounting hole, and the second fastener passes through the third mounting hole to connect the second matching portion; Alternatively, the lower frame is provided with a fourth mounting hole, and the second fastener passes through the fourth mounting hole to connect the second connecting portion; Alternatively, the second connecting portion and the second matching portion are respectively provided with a third mounting hole and a fourth mounting hole, and the second fastener passes through the third mounting hole and the fourth mounting hole in sequence to connect the hanger and the lower frame.

5. The frame assembly of claim 2, wherein, One of the first connecting portion and the first matching portion is provided with a first positioning groove, and the other is provided with a first limiting block, the first limiting block being inserted into the first positioning groove to positionally connect the upper tube and the upper frame; And / or, one of the second connecting portion and the second matching portion is provided with a second positioning groove, and the other is provided with a second limiting block, the second limiting block being positioned in the second positioning groove to positionally connect the hanger and the lower frame.

6. The frame assembly of claim 2, wherein, The hanger is used for mounting a motor, the second connecting portion is arranged at one end of the hanger for connection with the cargo box, an end of the hanger away from the second connecting portion is provided with a third connecting portion, and the third connecting portion is provided with a cutting groove and a second through hole for connection with a frame.

7. The frame assembly of claim 6, wherein, The third connecting part comprises the cutting groove arranged at one end of the first connecting part away from the hanger body and arranged in a ring shape, and the second through hole is arranged in the first connecting part along the width direction of the hanger body.

8. The frame assembly of any one of claims 1 to 7, wherein, The frame assembly further comprises a head tube, and the cargo box or the frame body is further provided with a first sleeve and a second sleeve, the head tube is sequentially arranged in the first sleeve and the second sleeve, and one end of the head tube away from the bottom of the cargo box is used for mounting a handlebar; And / or, the frame assembly further comprises a battery arranged in the cargo box, the frame body is further provided with a motor, the second matching part is provided with a wire hole, the frame body is provided with a wire channel, and the wire hole and the wire channel are used for electrically connecting the motor and the battery through a cable.

9. The frame assembly of claim 1, wherein, The cargo box has a cargo cavity with an opening facing upward, the opening of the cargo cavity is provided with an upper frame, the upper frame is provided with a first mounting part and a second mounting part, the first mounting part and the second mounting part are arranged at both ends of the upper frame along the length direction of the cargo box, the first mounting part is used for mounting a first lamp group, and the second mounting part is used for mounting a second lamp group.

10. The frame assembly of claim 9, wherein, The upper frame is concave at both ends along the length direction of the cargo box to form a first accommodating groove and a second accommodating groove, the first accommodating groove constitutes the first mounting part, and the second accommodating groove constitutes the second mounting part; the first accommodating groove is arranged in a long strip along the width direction of the cargo box; and / or the number of the second accommodating grooves is plural, and the plural second accommodating grooves are arranged at intervals along the width direction of the cargo box body.

11. The frame assembly of claim 10, wherein, The first lamp group comprises a lamp holder, a lamp strip, a lamp cover and a lamp shade, the lamp holder has a mounting cavity for mounting the lamp strip, the lamp cover is used for encapsulating the mounting cavity, the lamp holder is mounted in the first accommodating groove, and the lamp shade is used for encapsulating the first accommodating groove; And / or The second lamp group comprises a lamp holder, a lamp strip, a lamp cover and a lamp shade, the lamp holder has a mounting cavity for mounting the lamp strip, the lamp cover is used for encapsulating the mounting cavity, the lamp holder is mounted in the second accommodating groove, and the lamp shade is used for encapsulating the second accommodating groove.

12. The frame assembly of claim 10, wherein, The slot structure and the circumferential wall of the mounting cavity form a plug-in groove with an opening facing the cavity opening of the mounting cavity, the circumferential side of the lamp cover facing the lamp holder is provided with a protruding piece, and the protruding piece corresponds to the plug-in groove; And / or, the cavity bottom of the mounting cavity is provided with a protruding structure on the side facing the cavity opening, and the lamp strip is provided with a mounting hole corresponding to the protruding structure.

13. The frame assembly of claim 1, wherein, The frame assembly further comprises a transmission wheel, a linkage wheel, a belt, a tensioning wheel and a tensioning structure arranged on the frame body, the belt is arranged on the transmission wheel and the linkage wheel, the tensioning wheel is connected with the frame body through the tensioning structure, the tensioning wheel is used for pressing and rotatingly connecting the belt, and the tensioning structure is used for adjusting the tightness of the belt.

14. The frame assembly of claim 13, wherein, The tensioning structure comprises: The connecting piece comprises a first connecting section and a second connecting section, the first connecting section and the second connecting section are fixedly connected, the first connecting section is used for being connected with the belt, and the second connecting section is used for being connected with the frame body; The pressing piece is detachably arranged on the second connecting section; The elastic piece is sleeved on the second connecting section, the elastic piece comprises a first torsion arm and a second torsion arm, the first torsion arm is limitedly abutted with the frame body, the second torsion arm is limitedly abutted with the pressing piece, and the elastic piece can be used for buffering the vibration force of the belt transmitted to the frame body.

15. The frame assembly of claim 14, wherein, The end of the second connecting section away from the first connecting section is provided with at least one avoiding groove, the avoiding groove is opened along the length direction of the second connecting section, the pressing piece is provided with a mounting groove, and the mounting groove is matched with the end of the second connecting section away from the first connecting section.

16. The frame assembly of claim 15, wherein, The end of the second connecting section provided with the avoiding groove is also provided with a fixing hole, the fixing hole is opened perpendicularly to the length direction of the second connecting section, the pressing piece is provided with a positioning hole, the positioning hole is arranged through the cutting groove, and the positioning hole is corresponded to the fixing hole.

17. The frame assembly of claim 14, wherein, The end of the second connecting section close to the first connecting section is provided with at least one protruding part, the first connecting section close to the end of the second connecting section is provided with a mounting groove, and the mounting groove is matched with the protruding part; And / or, the elastic piece is arranged between the pressing piece and the first connecting section, and the elastic piece is exposed outside the pressing piece; And / or, the pressing piece comprises a fixed part and an abutting part, the connecting part is used for being connected with the second connecting section, the abutting part has an abutting surface used for being abutted with the second torsion arm, and the abutting surface is arranged in an inclined manner along the extension direction of the second torsion arm; And / or, the belt tensioner further comprises a bushing, and the bushing is arranged between the second connecting section and the elastic piece.

18. The frame assembly of claim 1, wherein, The frame assembly further comprises a steering device, the steering device comprises a first steering disc, a second steering disc and a wire harness adjusting structure, the first steering disc and the second steering disc are rotatably arranged on the frame body and are arranged at intervals, the wire harness adjusting structure is connected with the first steering disc and the second steering disc respectively, and the wire harness adjusting structure is arranged between the first steering disc and the second steering disc.

19. The frame assembly of claim 18, wherein, The wire harness adjusting structure comprises: A plurality of traction lines; A first adjusting assembly comprises an adjusting seat and a plurality of adjusting pieces, the adjusting seat is provided with a plurality of limiting holes, one adjusting piece is rotatably arranged in one limiting hole and is connected with one traction line, and each adjusting piece is used for adjusting the tightness of each traction line; A second adjusting assembly is used for driving the adjusting seat to move and driving a plurality of adjusting pieces to move, so as to simultaneously adjust the tightness of a plurality of traction lines.

20. The frame assembly of claim 19, wherein, The second adjusting assembly comprises an adjusting part and a positioning part, the adjusting part is connected with the adjusting seat, and the positioning part is rotatably connected with the adjusting part; And / or, the adjusting seat is further provided with a wire passing groove, and the wire passing groove is arranged in communication with the limiting hole; And / or, the adjusting seat further comprises a guide part, the vehicle frame assembly is protruded with a guide column, the guide part is in sliding connection with the guide column, and a locking piece is detachably arranged on the guide column and can abut against the guide part.

21. The steering apparatus of claim 20 wherein, The steering device further comprises a first limiter, which is detachably arranged on the vehicle frame assembly and is arranged in space with the adjusting seat, and a first wire passing groove is arranged on the first limiter, which is used for the traction line to pass through.

22. A two-wheeled vehicle characterized by, A vehicle frame assembly as claimed in any one of claims 1 to 21.

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