CN210338155U

CN210338155U - Scooter

Info

Publication number: CN210338155U
Application number: CN201920953685.XU
Authority: CN
Inventors: 许奕明; 钱杰; 茅立安; 姚生强
Original assignee: Deqing Yijiushan Ii Outdoor Activities Planning Co Ltd
Current assignee: Zhejiang Xindong Intelligent Technology Co., Ltd
Priority date: 2019-06-24
Filing date: 2019-06-24
Publication date: 2020-04-17
Anticipated expiration: 2029-06-24

Abstract

The utility model relates to a scooter, including automobile body, preceding wheel and rear wheel to and steering mechanism, steering mechanism includes handrail, steering spindle and rotates the seat, and the bottom of automobile body is provided with one and accomodates the chamber, rotates the seat setting and is accomodating intracavity and relative automobile body front and back rotation, and the upper end of steering spindle extends to take the district top and is connected with the handrail, and its lower extreme passes the automobile body and stretches into to accomodating intracavity and preceding wheel connection, and the steering spindle rotates to be installed on rotating the seat. The utility model makes the front wheel forward or backward rotate out of the containing cavity by the forward and backward rotation of the handrail, and finishes the sliding and parking states of the scooter, and the operation is simple and convenient; the front wheel forms a larger torque relative to the rotation center of the rotation seat due to the gravity of the front wheel and the gravity of the passenger in the advancing process, so that the situation that the front wheel rotates backwards due to the forward acting force applied to the handrail by the passenger in the sliding process and the scooter stops suddenly is prevented, safety accidents are avoided, and the safety is good.

Description

Scooter

Technical Field

The utility model relates to a slide technical field, in particular to scooter.

Background

The scooter is a novel product form for scooter entertainment after a traditional scooter, and is a simple labor-saving exercise machine, the scooter needs to be played with good balance capacity, the waist, the knees and the ankles need to be supported by force, and the existing scooter generally has the advantage that a rider can only stand on the scooter and cannot sit on the scooter when the scooter slides.

The utility model discloses a chinese utility model patent of application number 201821259576.X discloses a scooter, including the automobile body that is used for bearing the driver, front wheel and rear wheel of setting in the automobile body below, be provided with a steering system and a braking system in the automobile body, a steering system includes the handlebar, be provided with first through-hole on the automobile body, the handlebar passes first through-hole and is connected with the front wheel, and the handlebar can rotate around the axis of handlebar in first through-hole, braking system includes the brake cable and fixes the brake block on the automobile body, the first end of brake cable is connected with the handlebar, the second end is connected with the rear wheel, the handlebar can rotate around in first through-hole, drive the rear wheel through the brake cable and remove to contact with the brake block, its shortcoming lies in, this scooter can't park when unmanned operation on the road that has the slope.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a scooter can switch the gliding and the parking state of scooter through the handrail.

The above object of the present invention can be achieved by the following technical solutions: a scooter comprises a scooter body, a front wheel and a rear wheel which are arranged on the scooter body, and a steering mechanism for controlling the steering of the front wheel, the vehicle body is provided with a seating area, the steering mechanism comprises an armrest, a steering shaft and a rotating seat, the armrest is arranged above the seating area, the bottom of the vehicle body is provided with a containing cavity, the rotating seat is arranged in the containing cavity and rotates forwards and backwards relative to the vehicle body, the upper end of the steering shaft extends to the upper part of the sitting area and is connected with the handrail, the lower end of the steering shaft penetrates through the vehicle body and extends into the containing cavity to be connected with the front wheels, the steering shaft is rotatably arranged on the rotating seat, the handrail rotates along the axis of the steering shaft to drive the front wheels to rotate left and right, the rotating seat is positioned between the handrail and the front wheels, and the front wheels are rotated forwards out of the containing cavity to a supporting position or rotated backwards into the containing cavity through the rotation of the rotating seat.

Preferably, a limit structure for keeping the front wheel at the support position is arranged between the rotating seat and the vehicle body, an included angle α is formed between the axis of the steering shaft and the advancing direction of the scooter at the support position, and the included angle α is an obtuse angle.

Because contained angle α is the obtuse angle, the scooter is owing to self gravity and passenger's gravity at the in-process that gos forward for the rotation center of preceding wheel relative rotation seat forms great moment of torsion, and this moment of torsion can prevent that the passenger from exerting forward effort to the handrail and leading to the preceding wheel to turn backward at the in-process that slides, and this will lead to the preceding wheel to turn into and accomodate the intracavity and lead to the scooter to stop suddenly, produces the incident easily.

Preferably, the bottom of the vehicle body is provided with a supporting block for supporting the vehicle body when the front wheel rotates into the accommodating cavity, and the supporting block is arranged at the front part of the vehicle body.

Preferably, the height from the lower end surface of the support block to the bottom of the vehicle body is smaller than the height from the bottom of the vehicle body to the ground when the front wheel is located at the support position.

When the front wheels are rotated into the containing cavity, the front part of the scooter body is supported by the supporting block to prevent the scooter from sliding.

Preferably, the front end of the seating area is provided with a step part, the rear end of the seating area is provided with a backrest part, and the storage cavity is arranged in front of the step part.

When the bicycle is used, the feet of a passenger step forward on the pedal parts, the back leans against the backrest part at the rear part, the body is in a backward tilting posture, the sitting posture can generate the tendency that the armrests are pulled backward and the front wheels rotate forward in the sliding process, and therefore the front wheels are always in a supporting state.

Preferably, the lower end of the steering shaft is provided with a front wheel mounting seat, the front wheel is rotatably mounted on the front wheel mounting seat through a front wheel shaft, an anti-reverse mechanism is arranged between the front wheel and the front wheel shaft, the anti-reverse mechanism comprises a circular mounting groove, a fixed seat, a blocking piece and an elastic piece, the round mounting groove is arranged at the center of the front wheel, the fixed seat is fixed on the front wheel shaft and rotates relative to the round mounting groove, the fixed seat is provided with a blocking step, the blocking piece is arranged between the blocking step and the inner wall of the circular mounting groove, the elastic piece is abutted between the blocking step and the inner wall of the circular mounting groove, the vertical distance from the inner wall of the circular mounting groove to the blocking step is gradually reduced along one of the rotating directions, and a clamping groove for accommodating part of the blocking piece is arranged on the inner wall of the circular mounting groove.

When reversing, because the elastic action of elastic component, block piece and support all the time and lean on the inner wall of mounting groove and block between the step, the wheel rotates behind the certain angle before this moment because partly card that blocks is gone into in the draw-in groove and can't break away from to block the piece card and die the inner wall of mounting groove and block between the step, make the wheel before can't continue to rotate, even block the smooth also can guarantee the wheel braking before the inner wall surface of piece and mounting groove, realize preventing the function of reversing.

Preferably, the rear wheels are mounted on the vehicle body through a rear axle assembly, the rear axle assembly comprises a rear wheel shaft and a rear wheel mounting seat, the rear wheel mounting seat is arranged at two ends of the rear wheel shaft and rotatably mounted at the end part of the rear wheel shaft through a bearing, the rear wheels are fixed on the rear wheel mounting seat, a V-shaped mounting groove with an opening facing is formed in the bottom of the vehicle body, the rear wheel shaft is clamped in the V-shaped mounting groove from bottom to top, mounting plates are fixedly connected at two ends of the rear wheel shaft, and the mounting plates are fixed at the bottom of the vehicle body through fasteners.

The front and rear groove walls of the V-shaped installation position the rear wheel shaft and support the rear wheel shaft in the front and rear directions, so that the rear wheel shaft is firmly installed and is convenient to disassemble, assemble and replace.

Preferably, the mounting panel includes preceding mounting panel and rear mounting panel, preceding mounting panel and rear mounting panel set up the same one end at rear front wheel axle, and distribute around the axis of rear front wheel axle, preceding mounting panel downward sloping sets up, the rear mounting panel is the level setting, preceding mounting panel is fixed on the cell wall of V-arrangement mounting groove, the both ends of V-arrangement mounting groove are provided with the installation department, the rear mounting panel is fixed on the installation department.

Preferably, the mounting part is movably mounted on the vehicle body and moves up and down relative to the vehicle body, a vibration damping assembly is arranged between the mounting part and the vehicle body, the front mounting plate is hinged to the rear front wheel shaft, and the rear front wheel shaft swings up and down relative to the front mounting plate.

Preferably, a brake assembly is arranged between the rear wheel shaft and the rear wheel mounting seat and comprises a brake disc and brake pincers, the brake disc is mounted on the rear wheel mounting seat and located between the rear wheel mounting seat and the mounting plate, the brake pincers are mounted on the rear front wheel shaft, a brake handle is arranged on the armrest, and the brake handle is connected with the brake pincers through a brake cable.

The utility model discloses following beneficial effect has:

1. the utility model makes the front wheel forward or backward rotate out of the containing cavity by the forward and backward rotation of the handrail, and finishes the sliding and parking states of the scooter, and the operation is simple and convenient;

2. the scooter is characterized in that the front wheels form a larger torque relative to the rotation center of the rotation seat due to the gravity of the scooter and the gravity of passengers in the advancing process, the torque can prevent the passengers from applying forward acting force on handrails in the sliding process to cause the front wheels to rotate backwards, and prevent the front wheels from rotating into the containing cavity to cause the scooter to stop suddenly, thereby avoiding safety accidents and having good safety;

3. the front wheels are provided with the anti-reverse mechanism, so that the scooter can only slide forwards, and the safety performance of the scooter is further improved.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a side view of an embodiment of the invention;

FIG. 3 is a schematic structural view of a vehicle body according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a steering mechanism in an embodiment of the present invention;

fig. 5 is a schematic structural view of an anti-reverse mechanism in an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a rear axle assembly in an embodiment of the present invention;

fig. 7 is a schematic structural view of a rear axle in an embodiment of the present invention;

FIG. 8 is a schematic view of the mounting of the rear axle to the vehicle body in an embodiment of the present invention;

fig. 9 is a schematic structural view of the scooter of the embodiment of the present invention in a sliding state;

FIG. 10 is a schematic structural view of the scooter of the embodiment of the present invention in a parked state;

in the figure: 1-vehicle body, 101-seating area, 102-pedal part, 103-backrest part, 104-storage cavity, 105-V-shaped mounting groove, 106-mounting part, 2-front wheel, 201-circular mounting groove, 202-clamping groove, 3-rear wheel, 4-steering mechanism, 401-armrest, 402-steering shaft, 403-rotating seat, 404-steering fixed seat, 405-front wheel mounting seat, 5-front wheel shaft, 6-rear wheel shaft, 7-supporting block, 8-fixed seat, 801-blocking step, 802-limit step, 9-blocking part, 10-elastic part, 11-rear wheel mounting seat, 12-mounting plate, 1201-front mounting plate, 1202-rear mounting plate, 13-brake disc, 14-brake caliper, 15-brake handle, 16-brake mounting seat, 17-damping component and 18-limiting seat.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all the embodiments are protected by patent laws within the scope of the claims of the present invention.

Example (b): as shown in fig. 1 to 10, a scooter includes a body 1, front wheels 2 and rear wheels 3 mounted on the body 1, and a steering mechanism 4 for controlling the steering of the front wheels 2. The number of the front wheels 2 is one, and the front wheels are positioned at the front end of the vehicle body 1; the two rear wheels 3 are located at the rear end of the vehicle body 1. The vehicle body 1 has a seating area 101, a step portion 102 is provided at a front end of the seating area 101, a backrest portion 103 is provided at a rear end thereof, and a storage chamber 104 is provided at a bottom portion of the vehicle body 1, the storage chamber 104 being provided in front of the step portion 102.

As shown in fig. 4, the steering mechanism 4 includes an armrest 401, a steering shaft 402, and a rotating seat 403, the armrest 401 is disposed above the seating area 101, a steering fixing seat 404 is fixedly mounted at an opening of the storage cavity 104, the steering fixing seat 404 extends into the storage cavity 104, and the rotating seat 403 is located in the storage cavity 104 and rotatably mounted on the steering fixing seat 404, so that the rotating seat 403 rotates back and forth relative to the vehicle body 1.

A long groove extending forward and backward is provided in front of the step portion 102, and the steering shaft 402 is located in the long groove. The upper end of the steering shaft 402 extends above the seating area 101 and is connected to the armrest 401, and the lower end thereof extends into the storage chamber 104 through the vehicle body 1 and is connected to the front wheel 2. The steering shaft 402 is provided at its lower end with a front wheel mount 405, and the front wheels 2 are rotatably mounted on the front wheel mount 405 via a front wheel shaft 5.

The steering shaft 402 is rotatably mounted on the rotating base 403, the steering shaft 40 rotates in the left-right direction with respect to the rotating base 403, and the handle 401 rotates along the axis of the steering shaft 402 to drive the front wheels 2 to rotate left and right.

The rotary seat 403 is located between the armrest 401 and the front wheel 2, and the front wheel 2 is rotated in the forward or backward direction when the armrest is rotated forward or backward by the steering shaft 402 and the rotary seat 403. When the front wheel 2 rotates forwards, the front wheel 2 rotates out of the accommodating cavity 104 to a supporting position, and at the moment, the vehicle body 1 is supported on the ground by the front wheel 2; when the front wheel 2 rotates backward, the front wheel 2 rotates into the housing chamber 104. The bottom of the vehicle body 1 is provided with a support block 7 for supporting the vehicle body 1 when the front wheel 2 is turned into the housing chamber 104, and the support block 7 is provided at the front of the vehicle body 1.

A limiting structure for keeping the front wheel 2 at the supporting position is arranged between the rotating seat 403 and the vehicle body 1, the limiting structure comprises a limiting plate fixed on the rotating seat 403 and a stop block fixed on the steering fixing seat 404, and the stop block is positioned at the front side and the rear side of the limiting plate, so that the rotating seat 403 can rotate in the front and the rear direction to position the rotating seat 403 in the front and the rear direction.

As shown in fig. 9, in the supporting state, the front wheel 2 is mostly located outside the receiving cavity 104, and the axis of the steering shaft 402 forms an included angle α with the advancing direction of the scooter, the included angle α is an obtuse angle, in this embodiment, the included angle α is 100-120 degrees, and the height from the lower end surface of the supporting block 7 to the bottom of the scooter body 1 is smaller than the height from the bottom of the scooter body 1 to the ground when the front wheel 2 is located at the supporting position.

As shown in fig. 10, in the parking state, the front wheel 2 is mostly located in the receiving cavity 104, the axis of the steering shaft 402 forms an angle β with the advancing direction of the scooter, the angle β is an acute angle, in this embodiment, the angle β is 45-70 degrees, the height from the lowest end of the front wheel 2 to the bottom of the scooter body 1 is less than that from the lower end surface of the supporting block 7 to the bottom of the scooter body 1, and the scooter body 1 is supported on the ground by the supporting block 7 and cannot slide.

As shown in fig. 5, an anti-reverse mechanism is disposed between the front wheel 2 and the front axle 5, the anti-reverse mechanism includes a circular mounting groove 201, a fixing seat 8, a blocking member 9 and an elastic member 10, the circular mounting groove 201 is disposed at a central position of the front wheel 2, and the fixing seat 8 is fixed on the front axle 5 and rotates relative to the circular mounting groove 201.

The fixing base 8 is provided with a notch, and the notch is provided with a blocking step 801 and a limiting step 802, and the limiting step 802 intersects with the blocking step 801. The notch has a blocking member 9, the blocking member 9 is a cylindrical pin with a circular cross-section, and the center line of the blocking member 4 is parallel to the rotation axis of the front wheel 2. The blocking member 9 is located between the blocking step 801 and the inner wall of the circular mounting groove 201, and is laterally movable on the blocking step 801. The maximum vertical distance from the inner wall of the circular mounting groove 201 to the stopping step 801 is greater than or equal to the outer diameter of the stopping member 9.

The elastic member 10 is connected between the limit step 802 and the blocking member 9, the blocking member 9 abuts between the block step 801 and the inner wall of the circular mounting groove 201 through the elastic force of the elastic member 10, and the elastic member is a spring. The vertical distance from the inner wall of the circular mounting groove 201 to the blocking step 801 is gradually reduced along one of the rotation directions, and a clamping groove 202 for accommodating a part of the blocking member 9 is arranged on the inner wall of the circular mounting groove 201.

As shown in fig. 2, 6, 7 and 8, the rear wheel 3 is mounted on the vehicle body 1 through a rear axle assembly including a rear wheel shaft 6 and a rear wheel mount 11, the rear wheel mount 11 is provided at both ends of the rear wheel shaft 6 and rotatably mounted at an end of the rear wheel shaft 6 through a bearing, and the rear wheel 3 is fixedly mounted on the rear wheel mount 11.

As shown in fig. 8, a V-shaped mounting groove 105 with an opening facing is formed at the bottom of the vehicle body 1, the rear axle 6 is clamped in the V-shaped mounting groove 105 from bottom to top, mounting plates 12 are fixedly connected to two ends of the rear axle 6, and the mounting plates 12 are fixed at the bottom of the vehicle body 1 through fasteners. The part of rear wheel axle 6 between both ends mounting panel 12 is hollow structure to reduce scooter whole weight.

As shown in fig. 7, the mounting plate 12 includes a front mounting plate 1201 and a rear mounting plate 1202, the front mounting plate 1201 and the rear mounting plate 1202 are disposed at the same end of the rear-front axle 5 and are distributed forward and backward along the axis of the rear-front axle 5, the front mounting plate 1201 is disposed to be inclined downward, the rear mounting plate 1202 is disposed horizontally, the front mounting plate 1201 is fixed to the wall of the V-shaped mounting groove 105, the mounting portions 106 are disposed at both ends of the V-shaped mounting groove 105, and the rear mounting plate 1202 is fixed to the mounting portions 106.

As shown in fig. 8, a chute is formed in the bottom of the vehicle body 1, and the mounting portion 106 is movably mounted in the chute and moves up and down with respect to the vehicle body 1. The front mounting plate 1201 is fixed to the wall of the V-shaped mounting groove 105 by a fastener, and the rear mounting plate 1202 is fixed to the mounting portion 106 by a fastener. The front mounting plate 1201 is hinged to the rear axle 5, and the rear axle 5 swings up and down relative to the front mounting plate 1201. A damping assembly 17 is mounted in the sliding groove, and the damping assembly 17 is positioned between the mounting portion 106 and the vehicle body 1. The damping component is a spring, one end of the spring is connected to the mounting portion 106, and the other end of the spring is connected to the vehicle body 1. In order to prevent the mounting portion 106 from being separated from the sliding groove, a limiting seat 18 is disposed below the rear mounting plate 1202, an upper end of the limiting seat 18 is configured to abut against the lower portion of the rear mounting plate 1202, and the limiting seat 18 is detachably fixed on the vehicle body 1.

As shown in fig. 6, a brake assembly is arranged between the rear wheel shaft 6 and the rear wheel mounting seat 11, and the brake assembly adopts a conventional bicycle disc brake structure. The brake assembly comprises a brake disc 13 and a brake caliper 14, wherein the brake disc 13 is fixedly mounted on the rear wheel mounting seat 11 and is positioned between the rear wheel mounting seat 11 and the mounting plate 12. The brake caliper 14 is fixed to the rear front wheel axle 5 by a brake mounting 16. As shown in fig. 4, a brake handle 15 is arranged on the armrest 401, and the brake handle 15 is connected with the brake caliper 14 through a brake cable.

Claims

1. A scooter, comprising a body (1), front wheels (2) and rear wheels (3) mounted on the body (1), and a steering mechanism (4) for controlling the steering of the front wheels (2), the body (1) having a seating area (101), characterized in that: steering mechanism (4) include handrail (401), steering spindle (402) and rotate seat (403), handrail (401) set up in the top of taking area (101), the bottom of automobile body (1) is provided with one and accomodates chamber (104), it sets up to rotate seat (403) accomodate in chamber (104) and rotate around relative automobile body (1), the upper end of steering spindle (402) extends to and is connected with handrail (401) above taking area (101), and its lower extreme passes automobile body (1) and stretches into and is connected with front wheel (2) in accomodating chamber (104), steering spindle (402) rotate and install on rotating seat (403), handrail (401) rotate along the axis of steering spindle (402) and rotate about driving front wheel (2), it is located between handrail (401) and front wheel (2) to rotate seat (403) and make through the rotation of rotating seat (403) front wheel (2) forward roll over accomodate chamber (104) to support position or backward and accomodate the chamber and change over into and accomodate the chamber to receive the chamber (104) And (4) the following steps.

2. The scooter according to claim 1, wherein a position limiting structure is arranged between the rotating seat (403) and the scooter body (1) for keeping the front wheel (2) at a supporting position, in which the axis of the steering shaft (402) forms an included angle α with the forward direction of the scooter, the included angle α is an obtuse angle.

3. The scooter of claim 1, wherein: the bottom of the vehicle body (1) is provided with a supporting block (7) used for supporting the vehicle body (1) when the front wheels (2) are turned into the containing cavity (104), and the supporting block (7) is arranged at the front part of the vehicle body (1).

4. The scooter of claim 3, wherein: the height from the lower end surface of the supporting block (7) to the bottom of the vehicle body (1) is smaller than the height from the bottom of the vehicle body (1) to the ground when the front wheel (2) is located at the supporting position.

5. The scooter of claim 1, wherein: the front end of the sitting area (101) is provided with a pedal part (102), the rear end of the sitting area is provided with a backrest part (103), and the accommodating cavity (104) is arranged in front of the pedal part (102).

6. The scooter of claim 1, wherein: the lower end of the steering shaft (402) is provided with a front wheel mounting seat (405), the front wheel (2) is rotatably mounted on the front wheel mounting seat (405) through a front wheel shaft (5), an anti-reverse mechanism is arranged between the front wheel (2) and the front wheel shaft (5), the anti-reverse mechanism comprises a circular mounting groove (201), a fixed seat (8), a blocking piece (9) and an elastic piece (10), the circular mounting groove (201) is arranged at the central position of the front wheel (2), the fixed seat (8) is fixed on the front wheel shaft (5) and rotates relative to the circular mounting groove (201), the fixed seat (8) is provided with a blocking step (801), the blocking piece (9) is arranged between the blocking step (801) and the inner wall of the circular mounting groove (201) and is abutted against between the blocking step (801) and the inner wall of the circular mounting groove (201) through the elastic piece (10), the vertical distance from the inner wall of the circular mounting groove (201) to the blocking step (801) is gradually reduced along one rotation direction, and a clamping groove (202) used for containing part of the blocking piece (9) is formed in the inner wall of the circular mounting groove (201).

7. The scooter of claim 1, wherein: the rear wheel (3) is installed on the vehicle body (1) through a rear axle assembly, the rear axle assembly comprises a rear wheel shaft (6) and a rear wheel installation seat (11), the rear wheel installation seat (11) is arranged at two ends of the rear wheel shaft (6) and is rotatably installed at the end part of the rear wheel shaft (6) through a bearing, the rear wheel (3) is fixed on the rear wheel installation seat (11), a V-shaped installation groove (105) with an opening facing towards is formed in the bottom of the vehicle body (1), the rear wheel shaft (6) is connected in the V-shaped installation groove (105) from bottom to top in a clamped mode, installation plates (12) are fixedly connected to two ends of the rear wheel shaft (6), and the installation plates (12) are fixed at the bottom of the vehicle body (1) through fasteners.

8. The scooter of claim 7, wherein: mounting panel (12) are including preceding mounting panel (1201) and back mounting panel (1202), preceding mounting panel (1201) and back mounting panel (1202) set up the same one end in back front wheel axle (5), and distribute around the axis of following back front wheel axle (5), preceding mounting panel (1201) downward sloping sets up, back mounting panel (1202) are the level setting, preceding mounting panel (1201) are fixed on the cell wall of V-arrangement mounting groove (105), the both ends of V-arrangement mounting groove (105) are provided with installation department (106), back mounting panel (1202) are fixed on installation department (106).

9. The scooter of claim 8, wherein: the mounting portion (106) is movably mounted on the vehicle body (1) and moves up and down relative to the vehicle body (1), a vibration damping assembly (17) is arranged between the mounting portion (106) and the vehicle body (1), the front mounting plate (1201) is hinged to the rear front axle (5), and the rear front axle (5) swings up and down relative to the front mounting plate (1201).

10. The scooter of claim 7, wherein: be provided with brake assembly between rear wheel axle (6) and rear wheel mount pad (11), brake assembly includes brake disc (13) and brake caliper (14), install on rear wheel mount pad (11) and be located between rear wheel mount pad (11) and mounting panel (12) brake disc (13), brake caliper (14) are installed on rear front wheel axle (5), be provided with brake handle (15) on handrail (401), brake handle (15) are through brake line connection brake caliper (14).