Electric two-wheeled vehicle

Abstract

This application discloses an electric two-wheeled vehicle, comprising a frame, a running system, and a braking system. The running system includes wheels, and the braking system includes brake lines, brake calipers, and a brake lever. The brake caliper includes two housings, two pistons, two brake friction pads, and a resilient return member. Each housing contains one piston. Each housing has a mounting groove, and the brake friction pads are disposed within the mounting groove. The resilient return member connects the two brake friction pads. The mounting groove has a first groove wall and a second groove wall, and the brake friction pad has a first side wall and a second side wall. The first groove wall faces and contacts the first side wall, and the second groove wall faces the second side wall. A mounting gap exists between the second groove wall and the second side wall, and a flexible layer is disposed within the mounting gap. The electric two-wheeled vehicle of this application can improve the braking noise of the brake caliper.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to an electric two-wheeled vehicle. Background Technology

[0002] With the increasing emphasis on environmental protection and energy conservation in society, electric two-wheelers, as a green, energy-saving, and emission-reducing mode of transportation, are playing an increasingly important role in public transportation.

[0003] Currently, electric two-wheelers generally use brake calipers for braking. In traditional caliper structures, for ease of assembly, the assembly dimensions of the brake caliper housing are slightly larger than the outer ring dimensions of the brake pads. This results in a gap between the brake caliper housing and the brake pads after assembly. When the driver applies the brakes while reversing, the brake pads collide with the brake caliper housing, producing an impact sound and affecting the driving experience. Utility Model Content

[0004] In view of this, this application provides an electric two-wheeled vehicle with low braking noise from its brake calipers.

[0005] An embodiment of this application provides an electric two-wheeled vehicle, including a frame, a body panel, a running system, a suspension system, and a braking system. The frame includes a chassis. The body panel is supported by the frame. The running system includes wheels, which are disposed below the frame. The suspension system connects the wheels to the frame. The braking system includes brake lines, brake calipers, and a brake lever. The brake lever is disposed on the frame, and the brake lines connect the brake lever and the brake calipers. The brake caliper includes two housings, two pistons, two brake friction pads, and an elastic reset member. The two housings are arranged opposite each other, and each housing contains a piston. The piston is located between the housing and the brake friction pads and is used to drive the brake friction pads to move closer together. The elastic reset member connects the two brake friction pads to drive them to move away from each other. The housing has a mounting groove, and the brake friction pads are movably disposed in the mounting groove. The mounting groove has a first groove wall and a second groove wall arranged opposite each other. The brake friction pads have a first side wall and a second side wall. The first groove wall faces the first side wall and is in contact with the first side wall, and the second groove wall faces the second side wall. There is a mounting gap between the second groove wall and the second side wall, and a flexible layer is disposed in the mounting gap.

[0006] In at least one embodiment, the flexible layer is a rubber layer or a resin layer.

[0007] In at least one embodiment, a flexible layer is disposed on the second sidewall or the second groove wall, and the thickness of the flexible layer is less than the spacing of the assembly gap.

[0008] In at least one embodiment, the brake caliper further includes a connecting shaft that passes through and connects two housings, two brake friction pads, and an elastic reset member, wherein the direction of movement of the brake friction pads toward or away from each other is located in the axial direction of the connecting shaft.

[0009] In at least one embodiment, the brake friction pad includes a friction pad body and a protrusion, the protrusion being provided on the friction pad body and used for braking the wheel; the elastic reset member includes two clamping portions, each clamping portion clamping one of the protrusions of the brake friction pad.

[0010] In at least one embodiment, the braking system includes a brake disc fixedly connected to a wheel; a protrusion on the side away from the friction pad body has a friction surface, a portion of the brake disc is disposed between the two friction surfaces, and the two brake friction pads are brought close to each other so that the two friction surfaces rub against the brake disc.

[0011] In at least one embodiment, the protrusion has a heat dissipation groove located on the friction surface and extending to the edge of the friction surface.

[0012] In at least one embodiment, the friction pad body has a connecting surface, a protrusion is disposed on the connecting surface, the outer peripheral surface of the protrusion and the connecting surface form an avoidance groove, and the clamping part is embedded in the avoidance groove.

[0013] In at least one embodiment, the housing has a piston cylinder for accommodating a piston and forming a closed pressure space, which is connected to a brake oil line.

[0014] In at least one embodiment, the brake caliper includes a connector that detachably connects two housings.

[0015] In the electric two-wheeled vehicle of this application, when the brake friction pad is assembled in the mounting groove, an assembly gap can be formed between the second groove wall and the second side wall. This allows the brake friction pad to be less likely to be jammed by the first and second groove walls when driven by the elastic reset member or piston, thus improving the flexibility of the brake friction pad's movement. Furthermore, during braking, when the second side wall of the brake friction pad impacts the housing, it is buffered and damped by the flexible layer, thereby improving the rigid impact between the housing and the brake friction pad and reducing impact noise. Attached Figure Description

[0016] Figure 1 This is a perspective view of an electric two-wheeled vehicle in one embodiment of this application.

[0017] Figure 2 This is a perspective view of the vehicle frame in one embodiment of this application.

[0018] Figure 3 This is an exploded view of a brake caliper in one embodiment of this application.

[0019] Figure 4 This is a cross-sectional view of a brake caliper in one embodiment of this application.

[0020] Figure 5 This is an assembly diagram of a housing and a brake friction pad in one embodiment of this application. Detailed Implementation

[0021] In the description of the embodiments in this application, the words "exemplary," "or," and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design schemes. Specifically, the use of the words "exemplary," "or," and "for example" is intended to present the relevant concepts in a specific manner.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application's specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0023] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the embodiments and features described below can be combined with each other.

[0024] like Figure 1 and Figure 2 As shown, this application provides an electric two-wheeled vehicle 100, which includes a frame 10, a body panel 20, a running gear 30, a suspension system 40, a power system 50, and a braking system 60. It is understood that... Figure 1 The electric two-wheeler 100 shown is an electric-powered motorcycle.

[0025] Body panel 20 at least partially covers frame 10. Running gear 30 is at least partially disposed below frame 10, and includes wheels 31 disposed below frame 10. Suspension system 40 connects wheels 31 to frame 10. Powertrain 50 is supported by frame 10 and drives running gear 30.

[0026] To clearly illustrate the technical solution of this application, the following are also defined: Figure 1 and Figure 2The directions shown are front, back, left, right, up, and down. In this embodiment, the front, back, left, right, up, and down directions refer to the directions when the electric two-wheeled vehicle 100 is on a horizontal plane. The front-back direction refers to the length direction of the electric two-wheeled vehicle 100 provided in this application. The left-right direction refers to the width direction of the electric two-wheeled vehicle 100 provided in this application. The up-down direction refers to the height direction of the electric two-wheeled vehicle 100 provided in this application.

[0027] As one implementation method, such as Figure 2 As shown, the frame 10 includes a front frame 11, a middle frame 12, and a rear frame 13 connected in sequence. Viewed along the length of the electric two-wheeler 100, the frame 10 is substantially symmetrical about its central axis.

[0028] In some embodiments, the front frame 11 includes a head tube 111 and a main tube 112, with the main tube 112 connected to the middle portion of the head tube 111. The wheels 31 include a front wheel 311 and a rear wheel 312. The front wheel 311 is connected to the head tube 111 via a suspension system 40. Specifically, the suspension system 40 includes a front shock absorber 41 and a rear swingarm 42, with the front wheel 311 connected to the head tube 111 via the front shock absorber 41. The rear swingarm 42 connects the rear frame 13 to the rear wheel 312.

[0029] Please see Figure 2 In some embodiments, the mid-frame 12 includes a pair of longitudinal beams 121 extending along the front-rear direction of the electric two-wheeler 100 and a crossbeam 122 extending along the width direction of the electric two-wheeler 100 and connecting the two longitudinal beams 121. Exemplarily, the two longitudinal beams 121 are disposed on the left and right sides of the electric two-wheeler 100, with one end of each beam connected to the left and right sides of the lower part of the front frame 11, and the other end connected to the rear frame 13. The longitudinal beams 121 and the crossbeam 122 enclose an accommodating space 123. Specifically, the power system 50 includes a battery assembly 51, which is disposed within the accommodating space 123.

[0030] In some embodiments, the mid-frame 12 includes a pair of sub-beams 124 extending along the longitudinal direction of the electric two-wheeler 100. The two sub-beams 124 are disposed on the left and right sides of the electric two-wheeler 100 and below the longitudinal beam 121. One end of the sub-beam 124 is connected to the bottom of the main beam 112, and the other end of the sub-beam 124 is connected to the rear frame 13.

[0031] Please see Figure 2 , Figure 3 and Figure 4 In some embodiments, the braking system 60 includes a brake line 61, a brake caliper 62, and a brake lever 63. The brake lever 63 is mounted on the front frame 11, specifically connected above the head tube 111. The brake line 61 connects the brake lever 63 and the brake caliper 62.

[0032] The brake caliper 62 includes two housings 621, two pistons 622, two brake friction pads 623, and a resilient return member 624. The two housings 621 are arranged opposite each other, and each housing 621 contains a piston 622. The pistons 622 drive the brake friction pads 623 closer together to brake the wheel 31. The housings 621 have mounting grooves 6211, and the sides of the two housings 621 with mounting grooves 6211 are arranged opposite each other. Each brake friction pad 623 is movably disposed in one of the mounting grooves 6211. The resilient return member 624 connects the two brake friction pads 623 to drive the two brake friction pads 623 away from each other.

[0033] The assembly groove 6211 has a first groove wall 6211a and a second groove wall 6211b arranged opposite to each other. The brake friction pad 623 has a first side wall 6231a and a second side wall 6231b. The first groove wall 6211a faces the first side wall 6231a and is in contact with the first side wall 6231a. The second groove wall 6211b faces the second side wall 6231b. There is an assembly gap 6212 between the second groove wall 6211b and the second side wall 6231b. A flexible layer 625 is provided in the assembly gap 6212. The thickness of the flexible layer 625 is less than the spacing L1 of the assembly gap 6212.

[0034] When the brake friction pad 623 is assembled in the mounting groove 6211, a mounting gap 6212 can be formed between the second groove wall 6211b and the second side wall 6231b. This allows the brake friction pad 623 to be less likely to be jammed by the first groove wall 6211a and the second groove wall 6211b when driven by the elastic reset member 624 or the piston 622, thus improving the flexibility of the brake friction pad 623. Furthermore, during braking, when the second side wall 6231b of the brake friction pad 623 impacts the housing 621, it is buffered and damped by the flexible layer 625. This helps to reduce the rigid impact between the housing 621 and the brake friction pad 623, reduce impact noise, and reduce wear caused by the rigid impact between the housing 621 and the brake friction pad 623.

[0035] Please see Figure 2 In some instances, the brake caliper 62 comprises two calipers, one located on the front shock absorber 41 and the other on the rear swingarm 42, thereby enabling braking of the front wheel 311 and the rear wheel 312 respectively.

[0036] Please see Figure 3 and Figure 4In some embodiments, the housing 621 has a piston cylinder 6213, which accommodates the piston 622 and forms a sealed pressure space, which is connected to the brake line 61. When the brake lever 63 is operated, brake fluid in the brake line 61 can enter the sealed pressure space to increase the pressure within the sealed pressure space, thereby pushing the piston 622 to move. After the brake lever 63 is released, the brake fluid flows back to the brake line 61, and the piston 622 returns to its original position under the action of the elastic reset member 624.

[0037] In some embodiments, the housing 621 is made of metal.

[0038] Please see Figure 3 and Figure 4 In some embodiments, the first groove wall 6211a and the second groove wall 6211b are arranged opposite each other along a first direction X, and the brake friction pads 623 move closer or further apart in a second direction Y, with the first direction X perpendicular to the second direction Y. The two housings 621 are arranged opposite each other along the second direction Y.

[0039] Please see Figure 3 In some embodiments, the brake caliper 62 includes a connector 626 that detachably connects the two housings 621. For example, the connector 626 is a bolt, and the housings 621 have threaded holes through which the connector 626 passes. This detachable connection facilitates the assembly of the two housings 621 and internal components such as the elastic reset member 624 and the brake friction pad 623.

[0040] Understandably, the number of connectors 626 can be multiple; for example, there may be two, three, or four connectors 626.

[0041] Please see Figure 3 In some embodiments, the brake caliper 62 further includes a connecting shaft 627, which passes through and connects the two housings 621, the two brake friction pads 623, and the elastic reset member 624. For example, the housings 621, the brake friction pads 623, and the elastic reset member 624 are each provided with a through hole 628, and the connecting shaft 627 passes through the through hole 628. The direction of movement of the brake friction pads 623 toward or away from each other is located in the axial direction of the connecting shaft 627. The axial direction of the connecting shaft 627 is a second direction Y.

[0042] The connecting shaft 627 can connect the housing 621, the brake friction pad 623 and the elastic reset member 624, ensuring the relative positions of the housing 621, the brake friction pad 623 and the elastic reset member 624. When the brake friction pad 623 moves, the connecting shaft 627 can also play a guiding role, guiding the brake friction pad 623 to move closer to or further away from each other.

[0043] In some embodiments, the flexible layer 625 is disposed on the second sidewall 6231b or the second groove wall 6211b. When the flexible layer 625 is disposed on the second sidewall 6231b or the second groove wall 6211b, when the brake friction pad 623 impacts the housing 621, the flexible layer 625 can be located between the second side of the brake friction pad 623 and the second groove wall 6211b of the housing 621, reducing the noise generated by the direct impact between the second sidewall 6231b and the second groove wall 6211b. Figure 3 and Figure 4 The flexible layer 625 is disposed on the second groove wall 6211b.

[0044] In some embodiments, the flexible layer 625 is formed by spraying. Alternatively, the flexible layer 625 is adhered to the second sidewall 6231b or the second groove wall 6211b.

[0045] In some embodiments, the flexible layer 625 is a rubber layer or a resin layer. Both the rubber layer and the resin layer have a certain degree of elasticity and hardness, which not only makes them resistant to impact, but also absorbs the kinetic energy of the brake friction pad 623, reducing the noise generated by rigid impacts and the impact wear between the housing 621 and the brake friction pad 623.

[0046] Please see Figure 3 and Figure 4 In some embodiments, the brake friction pad 623 includes a friction pad body 6231 and a protrusion 6232, the protrusion 6232 protruding from the friction pad body 6231 and used to brake the wheel 31. The elastic reset member 624 includes two clamping portions 6241, each clamping portion 6241 clamping one of the protrusions 6232 of the brake friction pad 623.

[0047] The clamping part 6241 clamps the connecting brake friction plate 623, thereby enabling the friction plate to move when the elastic reset member 624 elastically deforms. Furthermore, the clamping method improves the connection stability between the clamping part 6241 and the protrusion 6232.

[0048] Please see Figure 3 and Figure 4 In some embodiments, the clamping part 6241 includes two clamping arms 6241a, a clamping space is formed between the two clamping arms 6241a, and the protrusion 6232 is located in the clamping space and clamps the outer peripheral surface of the protrusion 6232.

[0049] In some embodiments, the elastic reset member 624 includes a mounting portion 6242, and two clamping portions 6241 are connected to the mounting portion 6242. The mounting portion 6242 is disposed between the friction pad bodies 6231 of the two brake friction pads 623, and the mounting portion 6242 is provided with a through hole 628 through which a connecting shaft 627 passes.

[0050] Please see Figure 4 and Figure 5 In some embodiments, the friction pad body 6231 has a connecting surface 6231c facing the side where the elastic reset member 624 is located. A protrusion 6232 is provided on the connecting surface 6231c. The outer peripheral surface of the protrusion 6232 and the connecting surface 6231c form an avoidance groove 6233. The clamping part 6241 is embedded in the avoidance groove 6233, which is beneficial for the clamping part 6241 to avoid the brake disc 64. When the brake friction pad 623 is braked, the clamping part 6241 is less likely to interfere with the friction pad.

[0051] In some embodiments, the elastic reset member 624 is made of an elastic metal sheet.

[0052] Please see Figure 4 In some embodiments, the second sidewall 6231b is the outer wall of the friction pad body 6231.

[0053] Please see Figure 2 and Figure 5 In some embodiments, the braking system 60 includes a brake disc 64, which is fixedly connected to the wheel 31. For example, the brake disc 64 is coaxially fixed to the axle of the wheel 31. The protrusion 6232 has a friction surface 6232a on the side away from the friction pad body 6231, and a portion of the brake disc 64 is disposed between the two friction surfaces 6232a. The two brake friction pads 623 are brought close to each other so that the two friction surfaces 6232a rub against the brake disc 64.

[0054] When the braking system 60 is working, the brake oil in the brake oil pipe 61 drives the piston 622 to move. The piston 622 then drives the brake friction pads 623. At this time, the elastic restoring member 624 is compressed, and the elastic restoring force of the elastic restoring member 624 is less than the driving force of the piston 622. Under the drive of the piston 622, the brake friction pads 623 approach each other and clamp the brake disc 64. The brake disc 64 gradually stops rotating due to the frictional resistance of the brake friction pads 623, thereby causing the wheel 31 to brake with the brake disc 64.

[0055] Please see Figure 2 In some embodiments, the brake disc 64 is provided with a plurality of weight-reducing holes 641 in order to reduce the weight of the brake disc 64.

[0056] Please see Figure 4 and Figure 5 In some embodiments, the protrusion 6232 has a heat dissipation groove 6232b, which is located on the friction surface 6232a and extends to the edge of the friction surface 6232a.

[0057] The depth of the heat dissipation grooves 6232b allows for the determination of wear levels, facilitating timely replacement of the brake friction pads 623. The heat dissipation grooves 6232b also eliminate abnormal noise. Without them, during braking, the brake friction pads 623 would adhere to the brake disc 64, preventing air from escaping through the weight-reducing holes 641 on the brake disc 64, resulting in noise. The heat dissipation grooves 6232b help reduce resonance and deformation during thermal expansion, thus minimizing noise.

[0058] In addition, those skilled in the art may make other changes within this application. Of course, all such changes made in accordance with this application should be included within the scope disclosed in this application.

Claims

1. An electric two-wheeled vehicle, comprising: The frame, which includes the frame; Body panels, which are supported by the vehicle frame; A walking system, including wheels disposed below the frame; A suspension system that connects the wheels to the vehicle frame; A braking system, comprising a brake line, a brake caliper and a brake lever, wherein the brake lever is mounted on the vehicle frame and the brake line connects the brake lever and the brake caliper; Its features are, The brake caliper includes two housings, two pistons, two brake friction pads, and an elastic reset member. The two housings are arranged opposite to each other, and each housing contains one piston. The piston is located between the housing and the brake friction pads and is used to drive the brake friction pads to move closer to each other. The elastic reset member connects the two brake friction pads to drive the two brake friction pads to move away from each other. The housing has an assembly groove, and the brake friction pad is movably disposed in the assembly groove; the assembly groove has a first groove wall and a second groove wall disposed opposite to each other, the brake friction pad has a first side wall and a second side wall, the first groove wall faces the first side wall and contacts the first side wall, the second groove wall faces the second side wall, there is an assembly gap between the second groove wall and the second side wall, and a flexible layer is disposed in the assembly gap.

2. The electric two-wheeled vehicle as described in claim 1, characterized in that, The flexible layer is a rubber layer or a resin layer.

3. The electric two-wheeled vehicle of claim 1, wherein, The flexible layer is disposed on the second sidewall or the second groove wall, and the thickness of the flexible layer is less than the spacing of the assembly gap.

4. The electric two-wheeled vehicle as described in claim 1, characterized in that, The brake caliper also includes a connecting shaft, which passes through and connects the two housings, the two brake friction pads, and the elastic reset member. The direction of movement of the brake friction pads toward or away from each other is located in the axial direction of the connecting shaft.

5. The electric two-wheeled vehicle of claim 1, wherein, The brake friction pad includes a friction pad body and a protrusion protruding from the friction pad body, the protrusion being used to brake the wheel; the elastic reset member includes two clamping parts, each clamping part clamping one of the protrusions of the brake friction pad.

6. The electric two-wheeled vehicle of claim 5, wherein, The braking system also includes a brake disc, which is fixedly connected to the wheel; the protrusion has a friction surface on the side away from the friction pad body, and a portion of the brake disc is disposed between the two friction surfaces, and the two brake friction pads brake the brake disc by bringing them close to each other so that the two friction surfaces rub against each other.

7. The electric two-wheeled vehicle of claim 6, wherein, The protrusion has a heat dissipation groove, which is located on the friction surface and extends to the edge of the friction surface.

8. The electric two-wheeled vehicle of claim 5, wherein, The friction pad body has a connecting surface, the protrusion is disposed on the connecting surface, the outer peripheral surface of the protrusion and the connecting surface form an avoidance groove, and the clamping part is embedded in the avoidance groove.

9. The electric two-wheeled vehicle of claim 1, wherein, The housing has a piston cylinder body, which is used to accommodate the piston and form a sealed pressure space, and the sealed pressure space is connected to the brake oil pipe.

10. The electric two-wheeled vehicle as described in claim 1, characterized in that, The brake caliper also includes a connector that detachably connects the two housings.

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