Brake cable tightening structure and vehicle

Abstract

The brake cable tightening structure comprises a frame assembly, a swing frame assembly, a handle, a tensioning assembly and a brake cable used for dragging the tensioning assembly, the frame assembly, the swing frame assembly, the handle, the tensioning assembly and the brake cable are sequentially connected in a rotating mode, the frame assembly comprises a frame body and a limiting pin arranged on the frame body in a protruding mode, and a limiting groove is formed in the handle. The limiting pin is embedded into the limiting groove, the limiting groove comprises a traveling groove, a parking groove and a braking groove which are communicated with one another, and when the limiting pin slides to the parking groove from the traveling groove and is clamped in the parking groove, the tensioning assembly makes contact and friction with the wheels; and when the limiting pin slides to the brake groove from the traveling groove, the tensioning assembly is in contact friction with the wheels. According to the brake cable tightening structure, by moving the handle, transient braking can be achieved, long-time parking can also be achieved, and different application requirements can be met through the configuration of multiple functions.

Description

Technical Field

[0001] The utility model relates to the field of transportation tools, in particular to a brake wire tightening structure and a vehicle. Background Art

[0002] Braking is an indispensable function of transportation tools. At present, the braking of non-motor vehicles is mainly achieved by pulling the brake wire through the brake handle, so as to drive the brake pads to contact and friction with the wheels. However, the following problems exist in practical applications: after the brake handle is released, the brake wire and the brake pads will reset immediately, resulting in the failure of braking the wheels. In the case of long-term parking, the user needs to hold the brake handle all the time, which is obviously inconvenient. Summary of the Utility Model

[0003] An object of the utility model is to provide a brake wire tightening structure and a vehicle, aiming at solving the technical problem that the brake structure driven by the brake wire will only brake the wheels when the brake handle is pinched, and the brake handle needs to be continuously held during long-term parking.

[0004] To achieve the above object, a solution provided by the utility model is: a brake wire tightening structure, which includes a frame assembly, a swing frame assembly, a handle, a tensioning assembly and a brake wire. The frame assembly includes a frame body and a limiting pin protruding from the frame body; the swing frame assembly includes a swing piece and a first rotating pin and a second rotating pin arranged on the swing piece. The swing piece is rotatably connected with the frame body through the first rotating pin; the handle is provided with a limiting groove, and the handle is rotatably connected with the swing piece through the second rotating pin. The limiting pin is embedded in the limiting groove. The limiting groove includes a driving groove, a parking groove and a braking groove which are communicated with each other; the tensioning assembly is connected with the frame body; one end of the brake wire is connected with the swing piece, and the other end is connected with the tensioning assembly. The tensioning assembly is used to contact and friction with the wheel under the pulling action of the brake wire; wherein, when the limiting pin slides from the driving groove to the parking groove and is clamped in the parking groove, the tensioning assembly contacts and frictions with the wheel; when the limiting pin slides from the driving groove to the braking groove, the tensioning assembly contacts and frictions with the wheel.

[0005] Optionally, the groove walls of the driving groove and the braking groove are smoothly transitioned, and a protruding parking protrusion is formed at the junction of the groove walls of the driving groove and the parking groove. The parking protrusion is used to clamp the limiting pin.

[0006] Optionally, the distance between the parking groove and the second rotating pin is less than the distance between the driving groove and the second rotating pin.

[0007] Optionally, when the limiting pin is located in the parking groove, the connecting line direction between the limiting pin and the first rotating pin coincides with the extending direction of the brake wire.

[0008] Optionally, the handle includes a rotating part, a first grip part and a second grip part. The rotating part is provided with a limiting groove. The first grip part and the second grip part are respectively connected to the rotating part. One end of the first grip part away from the rotating part and one end of the second grip part away from the rotating part are connected to each other. The first grip part and the second grip part enclose a holding groove.

[0009] Optionally, the second grip part is between the first grip part and the tensioning component, and the curvature of the first grip part is less than that of the second grip part.

[0010] Optionally, the tensioning component includes a third rotating pin, a brake pad and a reset component. The third rotating pin is connected to the frame body. The brake pad is rotatably connected to the frame body through the third rotating pin. One end of the reset component is connected to the brake pad, and the other end is connected to the frame body. The brake wire passes through the reset component and is connected to the brake pad. One end of the brake pad away from the brake wire is used to contact and friction with the wheel.

[0011] Optionally, the frame body includes an upper frame body and a lower frame body that are slidably connected. The limiting pin and the first rotating pin are both fixedly connected to the upper frame body; the brake wire tightening structure includes a fastener, and the fastener is respectively connected to the upper frame body and the lower frame body.

[0012] Optionally, the vehicle frame assembly further includes a wire harness bracket. Both the upper frame body and the lower frame body are hollow structures. The wire harness bracket is arranged in the lower frame body and connected to the upper frame body. The brake wire passes through the upper frame body and winds around the wire harness bracket.

[0013] Optionally, the vehicle frame assembly further includes a return spring. The return spring is in a coiled state. One end of the return spring is fixedly connected to the upper frame body, and the other end of the return spring is connected to the brake wire.

[0014] To achieve the above object, a solution provided by the present utility model is: a vehicle, which includes: the brake wire tightening structure of any one of the above and a wheel, and the wheel is rotatably connected to the frame body.

[0015] Optionally, the vehicle includes a parallel component and two sets of brake wire tightening structures. The two sets of brake wire tightening structures are arranged side by side and connected through the parallel component. The parallel component is used to change the distance between the two sets of brake wire tightening structures.

[0016] Optionally, the parallel component includes a first connecting rod, a second connecting rod, a fourth rotating pin and a locking component. The first connecting rod and the second connecting rod are cross-rotatably connected through the fourth rotating pin. The first connecting rod is rotatably connected to the two sets of brake wire tightening structures. The opposite ends of the second connecting rod are respectively rotatably connected to the two sets of brake wire tightening structures. The locking component is connected to the brake wire tightening structure and is connected to at least one of the first connecting rod and the second connecting rod.

[0017] The beneficial effects of the present utility model are as follows:

[0018] The limiting groove includes a driving groove, a parking groove, and a braking groove that communicate with each other. The limiting pin is embedded in the limiting groove. When the limiting pin slides from the driving groove to the parking groove and is clamped in the parking groove, the tensioning assembly contacts and frictions with the wheel. When the limiting pin slides from the driving groove to the braking groove, the tensioning assembly contacts and frictions with the wheel.

[0019] The advantage of this setting is that when the vehicle needs to be briefly braked or decelerated during travel, the limiting pin slides into the braking groove, and the tensioning assembly frictions with the wheel to achieve braking or deceleration. After the user releases the handle, the limiting pin slides out of the braking groove, and the tensioning assembly also disengages from the wheel immediately, and the vehicle resumes normal travel. When the vehicle needs to stop and be braked for a long time, because the limiting pin is clamped in the parking groove, even if the user does not perform any operation on the handle, the tensioning assembly will continuously contact and friction with the wheel, locking the wheel and achieving long-term parking. Brief Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0021] Figure 1 It is a schematic cross-sectional view of the brake wire tightening structure provided by the embodiment of the present invention;

[0022] Figure 2 is Figure 1 a partial enlarged view of area A in

[0023] Figure 3 is Figure 2 a partial enlarged view of area B in

[0024] Figure 4 It is a schematic structural view of the brake wire tightening structure provided by the embodiment of the present invention in the braking state;

[0025] Figure 5 It is a schematic structural view of the brake wire tightening structure provided by the embodiment of the present invention in the parking state;

[0026] Figure 6 is Figure 1 a partial enlarged view of area C in

[0027] Figure 7 It is a schematic structural view of the tensioning assembly provided by the embodiment of the present invention in the braking or parking state;

[0028] Figure 8 is Figure 1Partial enlarged view of area D therein;

[0029] Figure 9 is a schematic structural diagram of the brake cable tightening structure provided by an embodiment of the present utility model when the upper frame body is far from the lower frame body;

[0030] Figure 10 is an overall schematic diagram of the vehicle provided by an embodiment of the present utility model in the deployed state;

[0031] Figure 11 is an overall schematic diagram of the vehicle provided by an embodiment of the present utility model from another perspective in the deployed state;

[0032] Figure 12 is Figure 10 a partial enlarged view of area E therein;

[0033] Figure 13 is an overall schematic diagram of the vehicle provided by an embodiment of the present utility model in the folded state.

[0034] Explanation of reference numerals in the drawings: 10, brake cable tightening structure; 11, frame assembly; 111, frame body; 1111, upper frame body; 1112, lower frame body; 112, limit pin; 113, cable support; 114, return spring; 12, swing frame assembly; 121, swing piece; 122, first rotating pin; 123, second rotating pin; 13, handle; 131. rotating part; 1311, limit groove; 13111, driving groove; 13112, parking groove; 13113, brake groove; 13114, parking protrusion; 132, first grip part; 133, second grip part; 134, holding groove; 14, tensioning assembly; 141, third rotating pin; 142, brake pad; 143, reset member; 15, brake cable; 151, brake wire; 152, brake sleeve; 16, fastener; 20, wheel; 30, parallel assembly; 31, first connecting rod; 311, first main rod; 312, first sub-rod; 32, second connecting rod; 321, second main rod; 322, second sub-rod; 33, fourth rotating pin; 34, locking member; 341, fifth rotating pin; 342, locking hook; 343, coil spring; 344, folding fixing pin; 345, unfolding fixing buckle. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0036] Please refer toFigures 1 to 3 As shown Figure 1 is a schematic cross-sectional view of a brake cable tightening structure 10 provided by an embodiment of the present invention, Figure 2 and is Figure 1 a partial enlarged view of area A in Figure 3 and is Figure 2 a partial enlarged view of area B in

[0037] An embodiment of the present invention provides a brake cable tightening structure 10, which includes a frame assembly 11, a swing frame assembly 12 rotatably connected to the frame assembly 11, a handle 13 rotatably connected to the swing frame assembly 12, a brake cable 15, and a tensioning assembly 14 for tightening the brake cable 15.

[0038] The frame assembly 11 includes a frame body 111 and a limit pin 112 protruding from the frame body 111. The shape of the limit pin 112 can be a cylinder or an ellipsoid cylinder, or any other arbitrary-shaped pin body. The swing frame assembly 12 includes a swing piece 121 and a first rotating pin 122 and a second rotating pin 123 provided on the swing piece 121. The swing piece 121 is rotatably connected to the frame body 111 through the first rotating pin 122. A limit groove 1311 is formed on the handle 13. The limit groove 1311 includes a driving groove 13111, a parking groove 13112, and a braking groove 13113 that communicate with each other. The limit pin 112 is embedded in the limit groove 1311. One end of the brake cable 15 is connected to the swing piece 121, and the other end is connected to the tensioning assembly 14. The tensioning assembly 14 is connected to the frame body 111. The tensioning assembly 14 is configured to contact and friction with the wheel under the pulling action of the brake cable 15.

[0039] Specifically, this embodiment provides an optional implementation manner. Referring to the orientation in the accompanying drawings, when the brake cable 15 is in a tensioned state, there is a tendency to pull the swing piece 121 to rotate clockwise, and when the swing piece 121 rotates counterclockwise, the brake cable 15 is pulled. The connection point of the brake cable 15 and the swing piece 121 is located on the side of the second rotating pin 123 away from the first rotating pin 122, so that the second rotating pin 123 can drive the brake cable 15 to move a large displacement with a small displacement. The connection point of the brake cable 15 and the swing piece 121 can also be set at other positions of the swing piece 121. For example, the connection point of the brake cable 15 and the swing piece 121 is set between the first rotating pin 122 and the second rotating pin 123, so that the second rotating pin 123 can transmit a greater pulling force to the brake cable 15.

[0040] Please refer to Figure 3 , Figure 3Schematically shows the structural schematic diagram of the brake cable tightening structure 10 provided by the embodiment of the present utility model in the driving state. In this embodiment, when the vehicle equipped with the brake cable tightening structure 10 provided by this embodiment is driving normally, the limit pin 112 is located in the driving groove 13111, and the tensioning assembly 14 does not come into contact and friction with the wheel.

[0041] Please refer to Figure 4 , Figure 4 is the structural schematic diagram of the brake cable tightening structure 10 provided by the embodiment of the present utility model in the braking state. When a braking operation is required, the handle 13 is lifted upwards, causing the swing piece 121 to rotate counterclockwise in the direction shown in the figure under the drive of the second rotating pin 123. The brake cable 15 pulls the tensioning assembly 14 into contact and friction with the wheel, achieving braking of the wheel. At this time, the limit pin 112 slides into the brake groove 13113, playing a limiting effect on the handle 13.

[0042] Please refer to Figure 5 , Figure 5 is the structural schematic diagram of the brake cable tightening structure 10 provided by the embodiment of the present utility model in the parking state. When a parking operation is required, the handle 13 is pressed downwards to make the limit pin 112 slide into the parking groove 13112 and be clamped in the parking groove 13112. The swing piece 121 rotates counterclockwise in the direction shown in the figure under the drive of the second rotating pin 123. The brake cable 15 pulls the tensioning assembly 14 into contact and friction with the wheel, achieving braking of the wheel. Since the limit pin 112 is clamped in the parking groove 13112 at this time, the swing piece 121 is simultaneously subjected to the force that makes it rotate clockwise by the brake cable 15 and the force that makes it rotate counterclockwise by the second rotating pin 123. The force of the second rotating pin 123 acting on the handle 13 pulls the limit groove 1311 into contact with the limit pin 112, and the acting force direction is perpendicular to the tangent of the contact point between the limit pin 112 and the limit groove 1311. Therefore, both the handle 13 and the swing piece 121 are in a force balance state, and the brake cable 15 continuously pulls the tensioning assembly 14 into contact and friction with the wheel.

[0043] The advantage of such a design is that when the vehicle needs to be briefly braked or decelerated during travel, the limit pin 112 slides into the brake groove 13113, and the tensioning assembly 14 frictions the wheel to achieve braking or deceleration; after the user releases the handle 13, the limit pin 112 slides out of the brake groove 13113, and the tensioning assembly 14 also disengages from the wheel immediately, and the vehicle resumes normal travel. When the vehicle needs to stop and be braked for a long time, because the limit pin 112 is clamped in the parking groove 13112, even if the user does not perform any operation on the handle 13, the tensioning assembly 14 will continuously contact and friction with the wheel, locking the wheel and achieving long-term parking.

[0044] Optionally, the groove wall of the driving groove 13111 and the groove wall of the braking groove 13113 are in smooth transition, while a protruding parking protrusion 13114 is formed at the junction of the groove wall of the driving groove 13111 and the groove wall of the parking groove 13112. The parking protrusion 13114 can be an independent structure convexly provided between the groove wall of the driving groove 13111 and the groove wall of the parking groove 13112, or can be naturally formed when the parking groove 13112 has a greater depth relative to the driving groove 13111. Further, the side wall of the parking protrusion 13114 close to the driving groove 13111 is in smooth transition with the groove wall of the driving groove 13111, while the side wall of the parking protrusion 13114 close to the parking groove 13112 has a depression for hindering the movement of the limit pin 112. When the limit pin 112 moves between the braking groove 13113 and the driving groove 13111, the smoothly transitioning groove walls are conducive to the start and cancellation of braking; when the limit pin 112 moves from the driving groove 13111 to the parking groove 13112, the smoothly transitioning groove walls enable the limit pin 112 to enter the parking groove 13112 more easily, and when the limit pin 112 moves from the parking groove 13112 to the driving groove 13111, the parking protrusion 13114 provides additional resistance to the limit pin 112 to avoid accidental cancellation of the parked state and reduce the probability of a sliding accident.

[0045] In one embodiment, the distance between the parking groove 13112 and the second rotating pin 123 is less than the distance between the driving groove 13111 and the second rotating pin 123, and the distance between the braking groove 13113 and the second rotating pin 123 is less than the distance between the driving groove 13111 and the second rotating pin 123. It should be noted that the braking groove 13113 and the driving groove 13111 in this embodiment are not geometric bodies with standard shapes. Specifically, when the limit pin 112 is located in the parking groove 13112, it is closer to the second rotating pin 123 than when the limit pin 112 is located in the driving groove 13111.

[0046] In this embodiment, when the limit pin 112 is located in the driving groove 13111 and the parking groove 13112, the connecting lines of the limit pin 112, the first rotating pin 122, and the second rotating pin 123 form a triangle. Among them, the lengths of one side formed by the limit pin 112 and the first rotating pin 122 and one side formed by the first rotating pin 122 and the second rotating pin 123 are fixed. As the limit pin 112 moves from the driving groove 13111 to the parking groove 13112, the distance between the limit pin 112 and the second rotating pin 123 decreases, so the included angle opposite to this side correspondingly decreases, that is, the swing piece 121 rotates counterclockwise as shown in the figure to pull the brake wire 15, thereby driving the tensioning assembly 14 to brake.

[0047] In another embodiment, when the limit pin 112 is located within the parking groove 13112, the direction of the line connecting the limit pin 112 and the first rotating pin 122 coincides with the direction of the line connecting the brake cable 15. Thus, when the limit pin 112 is located within the parking groove 13112, the acting force from the brake cable 15 points towards the rotation axis of the swing piece 121, that is, the first rotating pin 122. Therefore, without external force, there is no driving force for the swing piece 121 to rotate, and the limit pin 112 can be more stably clamped within the parking groove 13112, enabling the tensioning assembly 14 to come into contact with the wheel.

[0048] Exemplarily, the handle 13 includes a rotating portion 131, a first grip portion 132, and a second grip portion 133. The rotating portion 131 is provided with a limit groove 1311. The first grip portion 132 and the second grip portion 133 are respectively connected to the rotating portion 131. One end of the first grip portion 132 away from the rotating portion 131 and one end of the second grip portion 133 away from the rotating portion 131 are connected to each other, and the first grip portion 132 and the second grip portion 133 enclose to form a gripping groove 134.

[0049] In the perspective shown in the figure, the operator inserts a finger into the gripping groove 134. Squeezing the first grip portion 132 upward can achieve braking, and pushing the second grip portion 133 downward can achieve parking.

[0050] Furthermore, the second grip portion 133 is located between the first grip portion 132 and the tensioning assembly 14, and the curvature of the first grip portion 132 is smaller than the curvature of the second grip portion 133. Such a design makes the gripping groove 134 have a more comfortable gripping feel during braking and parking, optimizing the operation experience of the user.

[0051] Please refer to Figure 6 and Figure 7 , Figure 6 is a schematic structural diagram of the tensioning assembly 14 provided by an embodiment of the present invention in the driving state, Figure 7It is a schematic structural diagram of the tensioning assembly 14 provided by the embodiment of the present utility model in the braking or parking state. Exemplarily, the tensioning assembly 14 includes a third rotating pin 141, a brake pad 142, and a reset member 143. The third rotating pin 141 is connected to the frame body 111. The brake pad 142 is rotatably connected to the frame body 111 through the third rotating pin 141. One end of the reset member 143 is connected to the brake pad 142, and the other end is connected to the frame body 111. The brake cable 15 passes through the reset member 143 and is connected to the brake pad 142. The end of the brake pad 142 away from the brake cable 15 is used to contact and friction with the wheel. It can be imagined that the reset member 143 can be the spring shown in the figure, or any other structure that can move the brake pad 142 away from the wheel. In order to adjust the relationship between the displacement of the brake cable 15 and the frictional force, the distance from the third rotating pin 141 to the connection point of the brake cable 15 and the brake pad 142, and the distance from the third rotating pin 141 to the contact point of the brake pad 142 and the wheel can also be adjusted accordingly. Even the connection point of the brake cable 15 and the brake pad 142, and the contact point of the brake pad 142 and the wheel can be arranged on the same side of the third rotating pin 141.

[0052] In practical applications, when the brake cable 15 pulls the brake pad 142 to rotate, the end of the brake pad 142 away from the brake cable 15 contacts and frictions with the wheel to achieve braking; when the brake cable 15 is relaxed, the reset member 143 drives the brake pad 142 to rotate in the reverse direction to separate from the wheel and pulls the brake cable 15 to make it taut.

[0053] Please refer to Figure 8 and Figure 9 , Figure 8 It is a schematic structural diagram of the brake cable tightening structure 10 provided by the embodiment of the present utility model when the upper frame body 1111 approaches the lower frame body 1112. Figure 9 It is a schematic structural diagram of the brake cable tightening structure 10 provided by the embodiment of the present utility model when the upper frame body 1111 is away from the lower frame body 1112. In one embodiment, the frame body 111 includes an upper frame body 1111 and a lower frame body 1112 that are slidably connected. The limit pin 112 and the first rotating pin 122 are both fixedly connected to the upper frame body 1111. The brake cable tightening structure 10 includes a fastener 16, and the fastener 16 is respectively connected to the upper frame body 1111 and the lower frame body 1112.

[0054] Specifically, the upper frame body 1111 includes an inserted portion and a sleeved portion that are fixedly connected. The inserted portion is inserted into the lower frame body 1112, and the sleeved portion is sleeved outside the lower frame body 1112. The fastener 16 can optionally be a fastening screw that is threadedly engaged with the sleeved portion. It can be imagined that the upper frame body 1111 and the lower frame body 1112 can be any other mating structures. For example, a slot for the lower frame body 1112 to penetrate is provided on the upper frame body 1111, and a plurality of limiting holes are provided on the slot wall. Corresponding protrusions are provided on the surface of the lower frame body 1112 to correspond to the limiting holes for limiting the position of the lower frame body 1112 in the upper frame body 1111.

[0055] In this embodiment, the upper frame body 1111 can slide relative to the lower frame body 1112 and be locked. That is, the user can adjust the height of the handle 13 relative to the ground according to their own height and usage habits, which can bring a more comfortable usage experience to different user groups.

[0056] Furthermore, the frame assembly 11 further includes a wire harness bracket 113. Both the upper frame body 1111 and the lower frame body 1112 are hollow structures. The wire harness bracket 113 is disposed in the lower frame body 1112 and connected to the upper frame body 1111. The brake wire 15 passes through the upper frame body 1111 and winds around the wire harness bracket 113. It should be noted that according to the general experience in this field, the brake wire 15 includes a brake wire 151 and a brake sleeve 152 sleeved outside the brake wire 151. Both ends of the brake wire 151 are exposed outside the brake sleeve 152 and are tensioned in the working state. The brake sleeve 152 is a flexible tube with a constant length. Through the cooperation of the brake sleeve 152 and the brake wire 151, the movement of the swing piece 121 at the handle 13 can be more reliably transmitted to the wheel. When the brake wire 15 of this embodiment selects the above technical solution of the brake wire 151 and the brake sleeve 152, one end of the brake sleeve 152 is fixed to the upper frame body 1111, exemplarily fixed to the upper end of the wire harness bracket 113, and the other end of the brake sleeve 152 is fixed to the lower frame body 1112, exemplarily fixed to the area of the lower frame body 1112 near the wheel; one end of the brake wire 151 is connected to the swing piece 121, and the other end is connected to the tensioning assembly 14.

[0057] During the actual assembly process, since the upper frame body 1111 will slide relative to the lower frame body 1112, changing the distance between the handle 13 and the wheel. If the brake wire 15 is not correspondingly retracted, redundant brake wire 15 length will be generated or the brake wire 15 will be pre-tightened in advance, hindering the adjustment of the frame body 111 and also affecting the normal operation of the brake wire 15. The setting of the wire winding bracket provides guidance for the winding of the brake wire 15. When the upper frame body 1111 approaches the lower frame body 1112, the redundant brake wire 15 curls on the wire winding bracket. When the upper frame body 1111 moves away from the lower frame body 1112, the brake wire 15 curled on the wire winding bracket is released, so that the brake wire 15 remains in a relatively taut state in the area other than the wire winding bracket.

[0058] Further, the frame assembly 11 further includes a return spring 114. The return spring 114 is in a coiled state. One end of the return spring 114 is fixedly connected to the upper frame body 1111, and the other end of the return spring 114 is connected to the brake cable 15. It can be imagined that the return spring 114 can also be a tension spring, a compression spring, etc., as long as it can stretch the coiled brake cable 15 when the upper frame body 1111 approaches the lower frame body 1112. In this way, when the upper frame body 1111 is adjusted relative to the lower frame body 1112, the length change of the brake cable 15 is buffered by the cable winding bracket, and the brake cable 15 in the area of the lower frame body 1112 outside the cable winding bracket remains straight, which is beneficial to the operation of the brake structure and the adjustment of the frame body 111.

[0059] Please refer to Figures 10 to 13 as shown in Figure 10 FIG. 9 is an overall schematic diagram of the vehicle provided by the embodiment of the present invention in the unfolded state. Figure 11 FIG. 10 is an overall schematic diagram of the vehicle provided by the embodiment of the present invention in the unfolded state from another perspective. Figure 12 is Figure 10 a partial enlarged view of region E in Figure 13 FIG. 17 is an overall schematic diagram of the vehicle provided by the embodiment of the present invention in the folded state. The embodiment of the present invention also discloses a vehicle, which includes a brake cable tightening structure 10 and a wheel 20. The brake cable tightening structure 10 is any one of the brake cable tightening structures 10 provided in the above embodiments. Specifically, the wheel 20 is rotatably connected to the frame body 111, and specifically, the wheel 20 is rotatably connected to the lower frame body 1112, so that the tensioning assembly 14 abuts against the wheel 20 to achieve braking.

[0060] In this embodiment, by moving the operating handle 13, the brake cable 15 can be pulled to drive the tensioning assembly 14 to brake the wheel 20. Specifically, when the limit pin 112 is located in the driving groove 13111, the tensioning assembly 14 does not contact the wheel 20, and the vehicle travels normally; when the user pulls the handle 13, the limit pin 112 slides from the driving groove 13111 to the braking groove 13113, and the tensioning assembly 14 contacts the wheel 20 to brake. When the user releases the handle 13, the limit pin 112 returns to the driving groove 13111, and the braking is released; when the user pushes the handle 13 so that the limit pin 112 is stuck in the parking groove 13112, the tensioning assembly 14 contacts the wheel 20 to brake, and when the user releases the handle 13, the limit pin 112 still remains stuck in the parking groove 13112, and the wheel 20 is continuously braked, that is, the vehicle realizes parking.

[0061] In one embodiment, the vehicle includes parallel components 30 and two sets of brake cable tightening structures 10. The two sets of brake cable tightening structures 10 are arranged side by side and connected by the parallel components 30. The parallel components 30 are used to change the distance between the two sets of brake cable tightening structures 10. In this way, when long-term parking is required, the distance between the two brake cable tightening structures 10 can be reduced to reduce the space occupation.

[0062] It can be imagined that in order to make it smoother when the two frames 111 approach each other, in addition to being able to roll relative to the ground, the wheels 20 in this embodiment can also be additionally provided with a rotating shaft so that the wheels 20 can rotate around the rotation axis perpendicular to the ground to arbitrarily change their rolling direction.

[0063] Specifically, the parallel component 30 includes a first connecting rod 31, a second connecting rod 32, a fourth rotating pin 33, and a locking member 34. The first connecting rod 31 and the second connecting rod 32 are cross-rotatably connected by the fourth rotating pin 33. The first connecting rod 31 is rotatably connected to the two sets of brake cable tightening structures 10. The opposite ends of the second connecting rod 32 are respectively rotatably connected to the two sets of brake cable tightening structures 10. The locking member 34 is connected to the brake cable tightening structure 10 and is connected to at least one of the first connecting rod 31 and the second connecting rod 32.

[0064] Specifically, the first connecting rod 31 includes a first main rod 311 and a first sub-rod 312 that are rotatably connected. Among them, one end of the first main rod 311 away from the first sub-rod 312 is rotatably connected to a set of brake cable tightening structures 10, and one end of the first sub-rod 312 away from the first main rod 311 is rotatably connected to another set of brake cable tightening structures 10. The second connecting rod 32 includes a second main rod 321 and a second sub-rod 322 that are rotatably connected. Among them, one end of the second main rod 321 away from the second sub-rod 322 is rotatably connected to a set of brake cable tightening structures 10, and one end of the second sub-rod 322 away from the second main rod 321 is rotatably connected to another set of brake cable tightening structures 10. The first main rod 311 and the second sub-rod 322 are connected to the same set of brake cable tightening structures 10, and the second main rod 321 and the first sub-rod 312 are connected to another set of brake cable tightening structures 10.

[0065] The locking member 34 is used to limit the relative rotation of the first connecting rod 31 and the second connecting rod 32 when the two brake cable tightening structures 10 approach or unfold, so as to maintain a fixed relative distance between the two brake cable tightening structures 10. This embodiment provides a specific implementation of the locking member 34. The locking member 34 includes a fifth rotating pin 341, a locking hook 342, a coil spring 343, an unfolding fixing pin, and a folding fixing pin 344. The locking hook 342 is rotatably connected to the frame body 111 through the fifth rotating pin 341. The coil spring 343 is sleeved on the fifth rotating pin 341, and both ends of the coil spring 343 are connected to the frame body 111 and the locking hook 342 respectively. The unfolding fixing pin and the folding fixing pin 344 are fixedly arranged at least at one of the first connecting rod 31 or the second connecting rod 32. When the two brake cable tightening structures 10 are separated to a preset distance, the coil spring 343 drives the locking hook 342 to hook the unfolding fixing pin, so that the two brake cable tightening structures 10 are kept separated and the vehicle is in the unfolded state. When the two brake cable tightening structures 10 are close to each other, the coil spring 343 drives the locking hook 342 to hook the folding fixing pin 344, so that the two brake cable tightening structures 10 cannot be separated and the vehicle is in the folded state. It can be imagined that the unfolding fixing pin in this embodiment can be other structures that can cooperate with the locking hook 342, such as an unfolding fixing buckle 345, an unfolding fixing hole, etc., and the same is true for the folding fixing pin 344, which will not be elaborated here.

[0066] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0067] It should also be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as "connected" to another element, it can be directly connected to the other element or indirectly connected to the other element through an intermediate element.

[0068] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0069] The above are only the preferred embodiments of the present utility model, and thus do not limit the patent scope of the present utility model. Any equivalent structural transformation made under the concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields shall be included within the patent protection scope of the present utility model.

Claims

1. A brake cable tightening structure, characterized in that, Comprising: A frame assembly, including a frame body and a limit pin protruding from the frame body; A swing frame assembly, including a swing piece, a first rotating pin and a second rotating pin arranged on the swing piece, and the swing piece is rotatably connected to the frame body through the first rotating pin; A handle, provided with a limit groove, the handle is rotatably connected to the swing piece through the second rotating pin, the limit pin is embedded in the limit groove, and the limit groove includes a driving groove, a parking groove and a braking groove that communicate with each other; A tensioning assembly, connected to the frame body; A brake wire, one end of the brake wire is connected to the swing piece, and the other end is connected to the tensioning assembly, and the tensioning assembly is used to contact and friction with the wheel under the pulling action of the brake wire; Wherein, when the limit pin slides from the driving groove to the parking groove and is clamped in the parking groove, the tensioning assembly contacts and frictions with the wheel; when the limit pin slides from the driving groove to the braking groove, the tensioning assembly contacts and frictions with the wheel.

2. The brake cable tightening structure according to claim 1, characterized in that, The groove wall of the driving groove and the groove wall of the braking groove are smoothly transitioned, and a protruding parking protrusion is formed at the junction of the groove wall of the driving groove and the groove wall of the parking groove, and the parking protrusion is used to clamp the limit pin.

3. The brake cable tightening structure according to claim 1, characterized in that, The distance between the parking groove and the second rotating pin is less than the distance between the driving groove and the second rotating pin.

4. The brake cable tightening structure according to claim 1, wherein When the limit pin is located in the parking groove, the connecting direction of the limit pin and the first rotating pin coincides with the extending direction of the brake wire.

5. The brake cable tightening structure according to claim 1, characterized in that, The handle includes a rotating part, a first grip part and a second grip part, the rotating part is provided with the limit groove, the first grip part and the second grip part are respectively connected to the rotating part, one end of the first grip part away from the rotating part and one end of the second grip part away from the rotating part are connected to each other, and the first grip part and the second grip part surround and form a gripping groove.

6. The brake cable tightening structure according to claim 5, characterized in that, The second grip part is between the first grip part and the tensioning assembly, and the curvature of the first grip part is less than the curvature of the second grip part.

7. The brake cable tightening structure according to claim 1, characterized in that, The tensioning assembly includes a third rotating pin, a brake pad and a reset member, the third rotating pin is connected to the frame body, the brake pad is rotatably connected to the frame body through the third rotating pin, one end of the reset member is connected to the brake pad, the other end is connected to the frame body, the brake wire passes through the reset member and is connected to the brake pad, and the end of the brake pad away from the brake wire is used to contact and friction with the wheel.

8. The brake cable tightening structure according to claim 1, wherein The frame body includes an upper frame body and a lower frame body that are slidably connected, and the limit pin and the first rotating pin are both fixedly connected to the upper frame body; the brake wire tightening structure includes a fastener, and the fastener is respectively connected to the upper frame body and the lower frame body.

9. The brake cable tightening structure according to claim 8, wherein, The frame assembly further includes a wire harness bracket, both the upper frame body and the lower frame body are hollow structures, the wire harness bracket is arranged in the lower frame body and connected to the upper frame body, and the brake wire passes through the upper frame body and winds around the wire harness bracket.

10. The brake cable tightening structure according to claim 9, wherein, The frame assembly further includes a return spring, the return spring is in a coiled state, one end of the return spring is fixedly connected to the upper frame body, and the other end of the return spring is connected to the brake wire.

11. A vehicle, characterized in that, Comprising: The brake cable tightening structure according to any one of claims 1-10; and a wheel, which is rotatably connected to the frame.

12. The vehicle according to claim 11, characterized in that, The vehicle includes a parallel component and two sets of the brake cable tightening structures. The two sets of the brake cable tightening structures are arranged side by side and connected by the parallel component. The parallel component is used to change the distance between the two sets of the brake cable tightening structures.

13. The vehicle according to claim 12, characterized in that, The parallel component includes a first connecting rod, a second connecting rod, a fourth rotating pin and a locking member. The first connecting rod and the second connecting rod are cross-rotatably connected by the fourth rotating pin. The first connecting rod is rotatably connected to the two sets of the brake cable tightening structures. The opposite ends of the second connecting rod are respectively rotatably connected to the two sets of the brake cable tightening structures. The locking member is connected to the brake cable tightening structure and connected to at least one of the first connecting rod and the second connecting rod.

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