A motorcycle backrest

Abstract

The utility model discloses a motorcycle rear backrest, include: the backrest body of integrated mould, its front is equipped with waist support curved surface, vertical base, and the backrest body back central area is integrally connected, horizontal extension portion, and the vertical base bottom is integrally formed and extends to the motorcycle front, three groups of mounting seat, along the equidistance arrangement of horizontal extension portion front edge, and every group mounting seat is equipped with mounting hole, two symmetrical air flow guide hole that sets up, its through the backrest body middle part, and the flow guide hole axis is the acute angle included angle with horizontal plane, the streamline flange that expands gradually to the back, and the two sides of backrest body integrally extend. The utility model discloses through the shoulder blade part of upper back support area, lumbar vertebrae to support area accurate package lumbar vertebrae physiological curvature, sacrum support area stable support pelvis, and three areas synergistic effect will waist pressure evenly dispersed, and the long -distance riding fatigue is relieved significantly, through the flow guide slope, air flow guide hole, flow guide groove and streamline flange restrain tail turbulence, and the driving stability is improved significantly.

Description

Technical Field

[0001] This utility model relates to the field of motorcycle parts technology, and in particular to a motorcycle backrest. Background Technology

[0002] With increasing population density, urban traffic congestion is worsening. To alleviate travel difficulties, electric motorcycles, with their advantages of high carrying capacity, fast speed, and energy efficiency, are becoming increasingly popular. Electric motorcycles typically feature a rear seatback.

[0003] Traditional motorcycle backrests have the following drawbacks: 1. Insufficient support: The flat backrest cannot conform to the curve of the human spine, leading to lumbar strain during long-distance riding; 2. Wind resistance: Turbulence at the rear generates lift force when riding at high speeds, reducing vehicle stability; 3. Poor installation compatibility: The single-point mounting structure is prone to loosening and cannot adapt to different motorcycle tail racks; 4. Heat dissipation defects: The back becomes stuffy, affecting riding comfort.

[0004] Existing improvement solutions, such as adding ventilation holes or thickening the padding, fail to systematically address the issue of synergistic optimization between ergonomics and aerodynamic performance. Utility Model Content

[0005] This utility model discloses a motorcycle backrest, which improves upon existing structures and shortcomings to provide a motorcycle backrest with better practical value.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A motorcycle backrest, comprising:

[0008] The backrest body is made in one piece, and the front of it has a curved surface for lumbar support.

[0009] The vertical base is integrally connected to the central area of ​​the backrest body.

[0010] A horizontal extension is integrally formed with the bottom of the vertical base and extends forward of the motorcycle;

[0011] Three sets of mounting bases are arranged at equal intervals along the front edge of the horizontal extension, and each set of mounting bases is provided with mounting holes;

[0012] Two symmetrically arranged air guide holes penetrate the middle of the backrest body, and the axis of the air guide holes forms an acute angle with the horizontal plane.

[0013] The streamlined flanges, which gradually widen rearward, extend integrally from both sides of the backrest body.

[0014] In some embodiments, the thickness of the vertical base (23) gradually increases from the connection of the backrest body (1) to the horizontal extension (24), and the thickness increases by 0.8-1.2 mm for every 1 cm increase in length.

[0015] In some embodiments, the upper surface of the horizontal extension is provided with a flow guiding groove, the depth of which gradually decreases from the vertical base toward the mounting base.

[0016] In some embodiments, the air guide hole is an elongated oval through hole with its major axis pointing towards the top of the backrest body and its minor axis length being 1 / 4 of the height of the backrest body.

[0017] In some embodiments, the expansion angle β of the streamlined flange is 8°-12°.

[0018] In some embodiments, the lumbar support surface is a concave arc-shaped structure, and the lumbar support surface includes an upper back support area, a lumbar spine support area, and a sacral support area that are integrally connected from top to bottom.

[0019] In some embodiments, the top of the backrest body is provided with a guide slope, and the guide slope makes an angle α of 110°±5° with the horizontal plane.

[0020] In some embodiments, the guide slope array is provided with honeycomb-shaped through holes, and the walls of the honeycomb-shaped through holes are coated with a skin-friendly silicone layer.

[0021] In some embodiments, the front of the backrest body is covered with a cushioning layer, and the edge of the cushioning layer is connected to the inner edge of the streamlined flange by an edge-binding process.

[0022] The motorcycle backrest provided by this utility model has the following advantages:

[0023] 1. The composite ergonomic curved surface on the front of the backrest closely conforms to the curve of the rider's back. The upper back support area supports the shoulder blades, the lumbar support area precisely wraps the physiological curvature of the lumbar spine, and the sacral support area stably supports the pelvis. The three areas work together to evenly distribute the pressure on the lower back and significantly relieve fatigue during long-distance cycling.

[0024] 2. When the vehicle is traveling at high speed, the airflow is smoothly guided to the rear by the top guide slope. At the same time, the symmetrically arranged air guide holes guide part of the airflow through the backrest body, forming a negative pressure zone at the back. Combined with the guide grooves on the surface of the horizontal extension and the streamlined flanges that gradually widen towards the rear, the four elements work together to suppress rear turbulence and significantly improve riding stability. The gradually increasing thickness design from the vertical base to the horizontal extension forms a natural reinforcing structure, effectively dispersing the impact force of riding. The three sets of mounting seats, together with the positioning bosses, achieve three-point distributed load bearing, avoiding the stress concentration problem of traditional single-point installation and greatly extending the service life. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a motorcycle backrest proposed in this utility model;

[0026] Figure 2 This is a schematic diagram of the structure of a motorcycle backrest from another direction according to the present invention.

[0027] Figure 3 This is a schematic diagram of the structure of a motorcycle backrest from another direction according to the present invention.

[0028] Figure 4 This is a schematic diagram of the structure of a motorcycle backrest from another direction according to the present invention.

[0029] Figure 5 for Figure 4 The cross-sectional view along the AA direction is shown.

[0030] In the attached diagram: 1-backrest body, 11-upper back support area, 12-lumbar spine support area, 13-sacral support area, 14-guide slope, 141-honeycomb through hole, 101-streamlined flange; 21-mounting base, 22-mounting hole, 23-vertical base, 24-horizontal extension, 241-guide groove, 3-air guide hole, 6-buffer layer. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and marked in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0032] Reference Figures 1 to 5 In a preferred embodiment, a motorcycle backrest includes:

[0033] like Figure 1 and Figure 2 As shown, the one-piece molded backrest body 1 has a lumbar support curved surface on its front.

[0034] The vertical base 23 is integrally connected to the central area of ​​the backrest body 1.

[0035] The horizontal extension 24 is integrally formed with the bottom of the vertical base 23 and extends forward toward the motorcycle.

[0036] Three sets of mounting bases 21 are arranged at equal intervals along the front edge of the horizontal extension 24, and each set of mounting bases 21 is provided with mounting holes 22;

[0037] Two symmetrically arranged air guide holes 3 penetrate the middle of the backrest body 1, and the axis of the guide holes forms an acute angle with the horizontal plane.

[0038] The streamlined flange 101, which gradually widens towards the rear, extends integrally from both sides of the backrest body 1.

[0039] In some embodiments, the thickness of the vertical base 23 gradually increases from the connection point of the backrest body 1 to the horizontal extension 24, with a connection thickness T1=5±0.5mm and an end thickness T2=12±1mm, and a thickness variation rate of 0.8-1.2mm / cm.

[0040] In some embodiments, the upper surface of the horizontal extension 24 is provided with a flow guiding groove 241, the depth of which gradually decreases from the vertical base 23 toward the mounting base 21. Specifically, the cross-section of the flow guiding groove 241 is semi-elliptical, the radius of curvature of the groove bottom is r=20±2mm, and the groove depth gradually decreases linearly from the vertical base 23 toward the mounting base 21.

[0041] In some embodiments, the air guide hole 3 is an elongated oval through hole with its major axis facing the top of the backrest body 1 and its minor axis length being 1 / 4 of the height of the backrest body.

[0042] In some embodiments, the expansion angle β of the streamlined flange 101 is 8°-12°, and the flange end thickness δ is 3±0.3mm. In some embodiments, the front of the backrest body 1 is covered with a buffer layer 6, and the edge of the buffer layer 6 is connected to the inner edge of the streamlined flange 101 by an edge-wrapping process.

[0043] In some embodiments, the lumbar support surface is a concave arc structure. The deepest point of the lumbar support surface is H = 35 ± 2 mm from the reference surface of the backrest body. This point is located at 2 / 5 of the height of the backrest body, with a radius of curvature R = 220 ± 10 mm and a depth H = 35 ± 2 mm. The lumbar support surface includes an upper back support area 11, a lumbar spine support area 12, and a sacral support area 13, which are integrally connected from top to bottom. Specifically, the surface of the lumbar spine support area 12 is coated with a PU foam buffer layer 6, which has a Shore hardness C = 45 ± 3, a thickness of 8 ± 0.5 mm, and a compression set ≤ 10%. The surface of the buffer layer 6 is provided with radial air guide grooves, with a groove depth of 2 ± 0.2 mm, a groove width of 3 ± 0.3 mm, and an included angle θ = 30° ± 2° between adjacent grooves. Furthermore, the rate of change of curvature K of the waist support surface satisfies: K=(1 / R2-1 / R1) / L1=0.015±0.002mm⁻², K=(1 / R3-1 / R2) / L2=0.025±0.003mm⁻²; where L1 and L2 are the lengths of the curvature transition segment.

[0044] like Figure 3 and Figure 4 As shown, in some embodiments, the top of the backrest body 1 is provided with a guide slope 14, the guide slope 14 makes an angle α of 110°±5° with the horizontal plane, and the slope length S of the guide slope 14 is 120±10mm.

[0045] In some embodiments, the flow-guiding slope 14 array is provided with honeycomb-shaped through holes 141, and the walls of the honeycomb-shaped through holes are coated with a skin-friendly silicone layer. The single hole diameter of the honeycomb-shaped through holes 141 is Φ=2±0.2mm, and the pore density is 40-50 holes / cm².

[0046] In some embodiments, each mounting base 21 has a positioning part recessed into the backrest body 1, the center of the positioning part coinciding with the axis of the mounting hole, to ensure that the mounting surface does not move out of place and to form a closed-loop force flow transmission path.

[0047] In other embodiments, such as the racing version of a motorcycle backrest, the radii of curvature of the upper back support area 11, the lumbar support area 12, and the sacral support area 13 are R1=330mm, R2=210mm, and R3=140mm, respectively. Alternatively, in the cruiser version of a motorcycle backrest, the radii of curvature of the upper back support area 11, the lumbar support area 12, and the sacral support area 13 are R1=370mm, R2=230mm, and R3=160mm, respectively. The buffer layer 6 is made of PU foam (Shore C45) or a silicone gel composite layer.

[0048] Example 1: A motorcycle backrest includes:

[0049] The backrest body 1, made of PP material and molded in one piece, has a lumbar support curved surface on its front. This curved surface is a composite ergonomic curved surface, which includes an upper back support area 11 with a radius of curvature R1=350mm; a lumbar support area 12 with a radius of curvature R2=220mm; and a sacral support area 13 with a radius of curvature R3=150mm.

[0050] Specifically, the T-shaped support frame has a vertical base 23 with a thickness that gradually increases from 5mm at the connection point with the backrest body 1 to 12mm at the end. The horizontal extension 24 has a guide groove 241 on its surface, with a groove depth that gradually decreases from 3mm to 0mm. Specifically, the symmetrical oblong air guide hole 3 has a major axis of 80mm and a minor axis of 30mm. The guide slope 14 has an inclination angle of 110°, a slope length of 120mm, a streamlined flange 14 with an expansion angle of 10°, and a thickness of 3mm at the end.

[0051] Example 2:

[0052] Specifically, the lumbar support area 12 comprises a composite PU foam buffer layer 6 with a thickness of 8mm. The surface of the buffer layer 6 has radial air-guiding grooves with a depth of 2mm. A gel particle layer with a particle size of 1.5mm is filled between the buffer layer 6 and the backrest body 1. A honeycomb-shaped through-hole 141 with a pore diameter of 2mm is arrayed on the guide slope 14. The pore walls of the honeycomb-shaped through-hole 141 are coated with a 0.3mm thick skin-friendly silicone layer. The backrest body 1 contains a 15% glass fiber section, and the horizontal extension 24 has a built-in 2.5mm thick steel frame.

[0053] Working principle:

[0054] Crew reliance phase:

[0055] When the occupant's back touches the backrest, the composite ergonomic curved surface adaptively conforms to the spine's curve. The inward-concave structure of the lumbar support area 12 supports the physiological lordosis of the lumbar spine, while the covering buffer layer 6 undergoes elastic deformation to absorb vibration energy. The streamlined flanges 101 provide wraparound support from both sides, achieving dynamic pressure dispersion.

[0056] High-speed driving phase:

[0057] When the airflow impacts the top of the backrest, the guide slope 14 guides the airflow obliquely backward to avoid the airflow directly hitting the plane and generating lifting force; part of the airflow enters the air guide hole 3 to form a through airflow, reducing the back wind pressure; the remaining airflow is discharged along the guide groove 241 to the end of the horizontal extension 24, which, together with the gradually expanding structure of the streamlined flange 101, maintains the smooth adhesion of the tail airflow.

[0058] Vibration load transfer stage:

[0059] The impact force during riding is transmitted to the vertical base 23 through the backrest body 1, and the load gradient is diffused by the gradually increasing thickness of the backrest body 1 towards the horizontal extension 24. Finally, the force is evenly transmitted to the frame by the three sets of mounting seats 21 through the mounting holes 22. The positioning part ensures that the mounting surface does not move out of place, forming a closed-loop force flow transmission path.

[0060] All content not described in detail in this specification belongs to the prior art known to those skilled in the art. The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements for some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A motorcycle backrest, characterized in that, include: The backrest body (1) is formed in one piece, and its front is provided with a lumbar support curved surface; The vertical base (23) is integrally connected to the central area of ​​the back of the backrest body (1); The horizontal extension (24) is integrally formed with the bottom of the vertical base (23) and extends forward of the motorcycle; Three sets of mounting bases (21) are arranged at equal intervals along the front edge of the horizontal extension (24), and each set of mounting bases (21) is provided with mounting holes (22). Two symmetrically arranged air guide holes (3) penetrate the middle of the backrest body (1), and the axis of the guide holes forms an acute angle with the horizontal plane; A streamlined flange (101) that gradually widens rearward extends integrally from both sides of the backrest body (1).

2. The motorcycle backrest according to claim 1, characterized in that, The thickness of the vertical base (23) gradually increases from the connection point of the backrest body (1) towards the horizontal extension (24), and the thickness increases by 0.8-1.2 mm for every 1 cm increase in length.

3. The motorcycle backrest according to claim 1, characterized in that, The upper surface of the horizontal extension (24) is provided with a flow guide groove (241), and the depth of the flow guide groove (241) gradually decreases from the vertical base (23) toward the mounting base (21).

4. The motorcycle backrest according to claim 1, characterized in that, The air guide hole (3) is an elongated oval through hole with its long axis facing the top of the backrest body (1) and its short axis length being 1 / 4 of the height of the backrest body.

5. The motorcycle backrest according to claim 1, characterized in that, The expansion angle β of the streamlined flange (101) is 8°-12°.

6. The motorcycle backrest according to claim 1, characterized in that, The lumbar support surface is a concave arc structure, and the lumbar support surface includes an upper back support area (11), a lumbar spine support area (12), and a sacral support area (13) that are integrally connected from top to bottom.

7. The motorcycle backrest according to claim 1, characterized in that, The backrest body (1) has a guide slope (14) at the top, and the guide slope (14) has an angle α of 110°±5° with the horizontal plane.

8. The motorcycle backrest according to claim 7, characterized in that, The flow-guiding slope (14) array is provided with honeycomb-shaped through holes (141), and the walls of the honeycomb-shaped through holes are coated with a skin-friendly silicone layer.

9. The motorcycle backrest according to claim 1, characterized in that, The backrest body (1) is covered with a buffer layer (6) on the front, and the edge of the buffer layer (6) is connected to the inner edge of the streamlined flange (101) by a binding process.

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