Lightweight elastic bumper

Abstract

A light-weight elastic bumper comprises a front vertical pipe, an upper pipe, a lower pipe, a rear vertical pipe, a rib plate, a front side pipe, a buffer, a large hoop, a large rubber mat, a rear side pipe, a small rubber mat, a small hoop and a transverse pipe. Two ends of the transverse pipe are connected with the inner sides of the front vertical pipes on two sides, the right upper sides of the front vertical pipes are connected with the left upper sides of the rear vertical pipes through upper pipes, and the right lower sides of the front vertical pipes are connected with the left lower sides of the rear vertical pipes through lower pipes; the right end of the front side pipe is connected with a piston step hole in a sleeved mode through a left side hole of a buffer. The buffer is connected with a large hoop sleeve. A large rubber pad is arranged between the buffer and a large hoop. A buffer plug step hole is connected with the left end of the rear side pipe in a sleeved mode, and a small hoop is connected with the right side of the rear side pipe in a sleeved mode. And the small rubber mat is arranged between the rear side pipe and the small hoop. According to the carbon fiber reinforced polypropylene pipe light-weight elastic bumper, impact loads in all directions are reduced through buffering and damping, the impact resistance and crack resistance of the carbon fiber reinforced polypropylene pipe light-weight elastic bumper are improved, a steel pipe bumper can be replaced, safety protection performance is considered, and a vehicle body is prevented from being overweight.

Description

TECHNICAL FIELD

[0001] The utility model relates to portable riding vehicle protection device, especially the bumper of electric bicycle. BACKGROUND

[0002] With the government's limit weight index of electric bicycle repeatedly updated, since the steel pipe bumper will cause the portable riding vehicle overweight, some electric bicycles, even the moped and light electric tricycle, in order to avoid over standard, have abandoned the bumper, such as shared bicycle etc. ; Although the abandonment of bumper meets the limit weight index, but sacrifices the safety, especially in peak period, the vehicle basically cannot keep the safe distance, the impact and rollover accident is difficult to avoid, especially the express delivery man is the high incidence of impact and rollover accident, the express delivery man part-time staff is more, and the express company does not equip the exclusive riding for them, and the express delivery man who rides the electric bicycle and moped without bumper is countless, and the lightweight bumper is crucial to the safety of the express delivery man on the way.

[0003] Although the aluminum pipe bumper has certain lightweight effect, but its mechanical strength is low, reduces the safety protection of electric bicycle, and the weight reduction is limited, how to consider the safety protection and anti-overweight of electric bicycle has become a pair of contradictions.

[0004] The carbon fiber reinforced polypropylene has high mechanical strength and good toughness, can effectively resist external impact without breaking compared with other engineering plastics, and the density is much lower than that of aluminum alloy, and using the carbon fiber reinforced polypropylene pipe bumper to replace the existing steel pipe bumper is an effective measure considering safety and preventing the vehicle body from overweight.

[0005] The bumper is usually made of steel pipe hot bending, and the carbon fiber reinforced polypropylene pipe material hot bending has the following problems, the carbon fiber reinforced polypropylene pipe material filler mainly includes random, directional and other types, the random filler has good fluidity and filling performance, is suitable for hot bending forming, but the outside of the bent pipe will be thinned and stretched, and the inside will be wrinkled and extruded, the plasticity and elongation of the carbon fiber reinforced polypropylene is not as good as that of the steel pipe, especially at the bent pipe, which will reduce the impact resistance and crack resistance of the bumper; The impact resistance and crack resistance of the directional filler are greatly improved, but it does not have fluidity and filling performance, and the elongation of the carbon fiber is low, the bending degree is effective, and the filler is easily torn when the bumper is forced to be hot bent, resulting in pipe scrap. UTILITY MODEL CONTENTS

[0006] The utility model aims at overcoming the defects of prior art, and provides a lightweight elastic bumper with good impact resistance and crack resistance.

[0007] The utility model discloses a light weight elastic bumper, it is including: front vertical pipe, upper pipe, lower pipe, rear vertical pipe, muscle plate, front side pipe, buffer, big hoop, big rubber pad, rear side pipe, small rubber pad, small hoop, horizontal pipe, horizontal pipe is located bumper left end, and horizontal pipe both ends are fixedly connected two sides front vertical pipe inboard respectively, and the right upper side of front vertical pipe is fixedly connected the left upper side of rear vertical pipe through upper pipe, and the right lower side of front vertical pipe is fixedly connected the left lower side of rear vertical pipe through lower pipe, and the right lower side of rear vertical pipe is fixedly connected the left end of front side pipe, and the right side of rear vertical pipe is fixedly connected the left upper side of front side pipe through muscle plate, and the right end of front side pipe is through buffer left side hole and is connected in piston left side step hole, and big hoop is connected in buffer outside, and big rubber pad is inlaid between buffer and big hoop, and buffer right side plug step hole is connected in rear side pipe left end, and rear side pipe right side is connected in small hoop, and small rubber pad is inlaid between rear side pipe and small hoop.

[0008] The front vertical pipe, upper pipe, lower pipe, rear vertical pipe, muscle plate, front side pipe, buffer, big hoop, big rubber pad, rear side pipe, small rubber pad, small hoop are located the both sides of horizontal pipe, and the horizontal pipe is centered, and the mirror image symmetry two pieces are arranged.

[0009] The front vertical pipe, upper pipe, lower pipe, rear vertical pipe, front side pipe, rear side pipe are all made of directional filler carbon fiber reinforced polypropylene pipe material.

[0010] The buffer includes: shell, piston, rubber ball, elastic cylindrical pin, plug, piston is located in the left side of the right side hole of shell, and the left side step hole is aligned with the left side hole of shell, and the front side pipe is connected, the rubber ball is built-in in the right side hole of shell, and is located in the right side of piston, the left side of plug, the inside of big hoop, the plug is connected in the right side of the right side hole of shell, and the elastic cylindrical pin is located in the pin hole of shell right side and the pin hole of plug.

[0011] The shell is made of elastic nylon body, and the left side hole is small, and the right side hole is large, and the right side is provided with the pin hole matched with the plug, and the material is glass fiber filled nylon.

[0012] The piston is a disc structure, and the left side is provided with a step hole.

[0013] The rubber ball can be a single piece or multiple pieces.

[0014] The elastic cylindrical pin is a rolled elastic cylindrical pin, and is connected with the shell, the plug and the rear side pipe.

[0015] The plug is a disc structure, and the right side is provided with a step hole, and the step hole is provided with the pin hole matched with the shell and the rear side pipe.

[0016] The big hoop is made of elastic nylon body, and the single side mounting plate wide hoop is installed, and the mounting plate is located in the inside of bumper, and the mounting plate is provided with two mounting holes, and the material is glass fiber filled nylon.

[0017] The left end of rear side pipe is provided with the pin hole matched with the shell and the plug.

[0018] The small clamping hoop is an elastic nylon body, and the single-sided mounting plate narrow clamping hoop is arranged on the inner side of the bumper.

[0019] The utility model discloses a straight pipe bumper, and the fixing connector directly adopts the existing carbon composite vehicle frame splicing method, for example, tongue joint splicing method, ring clamp type splicing method and metal sleeve type splicing method.

[0020] The utility model discloses a straight pipe bumper, and the fixing connector directly adopts the existing carbon composite vehicle frame splicing method, for example, tongue joint splicing method, ring clamp type splicing method and metal sleeve type splicing method.

[0021] When the front end of the bumper is subjected to a forward collision, the front pipe pushes the piston in the buffer to extrude the rubber ball, and the rubber ball can directly buffer the axial impact load; after being extruded, the rubber ball expands radially to decompose the axial impact load into a radial direction, achieving a buffering effect; the rubber ball is located on the inner side of the large clamping hoop, and the axial impact load decomposed in the radial direction and the axial load not decomposed are transmitted to the shell of the buffer; the shell is an elastic nylon body, and can transmit the load to the large clamping hoop through elastic deformation; the large rubber pad serves as a buffer rubber pad to absorb the impact load; the large clamping hoop is an elastic nylon body and also has a certain shock absorption effect, serving as a reinforcing hoop; the remaining impact load is transmitted to the small clamping hoop through the plug, the rear pipe and the small rubber pad after being buffered by the elastic cylindrical pin; after being buffered by the rubber ball, the large rubber pad, the elastic cylindrical pin and the small rubber pad, the impact force is greatly reduced, effectively improving the safety of the rider.

[0022] When the front end of the bumper is subjected to a lateral collision, the bumper not only bears the axial impact load, but also bears the impact torque load; the rubber ball and the elastic cylindrical pin in the buffer absorb the axial impact load; the large rubber pad and the small rubber pad serve as buffer rubber pads to absorb the impact torque load and the remaining axial impact load; the shell of the buffer and the large clamping hoop and the small clamping hoop are all elastic nylon bodies and also have a certain shock absorption effect, effectively reducing the impact force and improving the safety of the rider.

[0023] When the bumper is subjected to a lateral impact or lateral overturning, the bumper bears the lateral impact load; the large rubber pad and the small rubber pad serve as buffer rubber pads to absorb the lateral impact load; the large clamping hoop and the small clamping hoop are both elastic nylon bodies and also have a certain shock absorption effect, effectively reducing the impact force and improving the safety of the rider.

[0024] After buffering and shock absorption, the impact load in each direction is greatly reduced, the impact resistance and crack resistance of the lightweight elastic bumper made of the carbon fiber reinforced polypropylene pipe material are effectively improved, the lightweight elastic bumper can better replace the rigid bumper made of a steel pipe, and safety protection and prevention of the vehicle body overweight are considered.

[0025] Compared with the prior art, the utility model has the following advantages:

[0026] 1. The utility model discloses a good lightweight effect, the bumper made of the carbon fiber reinforced polypropylene pipe material is used to replace the steel pipe, has the mechanical strength of the steel pipe bumper, and the weight is far lower than that of the aluminum pipe bumper, under the premise of guaranteeing the safety of the rider, is more in line with the policy of the government electric bicycle weight limit.

[0027] 2. The utility model discloses good impact resistance and crack resistance, the carbon fiber reinforced polypropylene pipe material straight pipe of directional filler is spliced and is formed, avoids the defect that the outside of the bent pipe place will be thin and stretched, and the inside will be wrinkled and extruded to cause the impact resistance and crack resistance to drop in the heat bending process.

[0028] 3. The utility model discloses good buffering performance, the rubber ball, the big rubber pad, the elastic cylindrical pin and the small rubber pad can all act as the buffer rubber pad, effectively reduce the shock, absorb the shock, the shell and the big hoop of buffer and the small hoop are glass fiber filled type elastic nylon bodies, have a certain shock absorption effect, and the impact resistance is strong, effectively reduce the impact force that the vehicle body receives, effectively improve the safety of the rider, effectively improve the impact resistance and crack resistance of the carbon fiber reinforced polypropylene pipe lightweight elastic bumper, can better replace the steel pipe rigid bumper, and safety protection and prevention of the vehicle body overweight are considered.

[0029] The utility model discloses good universality, the utility model can be used to electric bicycle, also can be light motor car and light electric three-wheel. ACCURACY OF DRAWINGS

[0030] Figure 1 The utility model discloses a structure schematic diagram;

[0031] Figure 2 The utility model discloses a top view schematic diagram;

[0032] Figure 3 The utility model discloses a left view schematic diagram;

[0033] Figure 4 The utility model discloses a buffer structure schematic diagram. DETAILED DESCRIPTION

[0034] As Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, the utility model is a kind of lightweight elastic bumper, it includes: front vertical pipe 1, upper pipe 2, lower pipe 3, rear vertical pipe 4, web 5, front side pipe 6, buffer 7, big hoop 8, big rubber pad 9, rear side pipe 10, small rubber pad 11, small hoop 12, cross pipe 13;Cross pipe 13 is located at the left end of bumper, and the both ends of cross pipe 13 are respectively fixedly connected with the inner side of two front vertical pipes 1, and the right upper side of front vertical pipe 1 is fixedly connected with the left upper side of rear vertical pipe 4 through upper pipe 2, and the right lower side of front vertical pipe 1 is fixedly connected with the left lower side of rear vertical pipe 4 through lower pipe 3, to form triangular structure;The left end of front side pipe 6 is fixedly connected with the right lower side of rear vertical pipe 4, and the left upper side of front side pipe 6 is fixedly connected with the right side of rear vertical pipe 4 through web 5, and the right end of front side pipe 6 is sleeved with piston 7-2 left side step hole in buffer 7 left side hole, and big hoop 8 is sleeved with the outside of buffer 7, and big rubber pad 9 is embedded between buffer 7 and big hoop 8, and the left end of rear side pipe 10 is sleeved with buffer 7 right side plug 7-4 step hole, and rear side pipe 10 right side is sleeved with small hoop 12, and small rubber pad 11 is embedded between rear side pipe 10 and small hoop 12.

[0035] The front vertical pipe 1, upper pipe 2, lower pipe 3, rear vertical pipe 4, web 5, front side pipe 6, buffer 7, big hoop 8, big rubber pad 9, rear side pipe 10, small rubber pad 11, small hoop 12 are located at the both sides of cross pipe 13, are centered with cross pipe 13, and are arranged as mirror image.

[0036] The front vertical pipe 1, upper pipe 2, lower pipe 3, rear vertical pipe 4, front side pipe 6, rear side pipe 10 are all made of directional filler carbon fiber reinforced polypropylene pipe material.

[0037] The buffer 7 includes: shell 7-1, piston 7-2, rubber ball 7-3, elastic cylindrical pin 7-4 plug 7-5;Piston 7-2 is located in the left side hole right side of shell 7-1, and left side step hole is aligned with the left side hole of shell 7-1, and the right end of front side pipe 6 is sleeved;Rubber ball 7-3 is built-in in the right side hole of shell 7-1, is located in the right side of piston 7-2, is located in the left side of plug 7-5, and is located in the inside of big hoop 8;Plug 7-5 is sleeved in the right side hole right side of shell 7-1, and elastic cylindrical pin 7-4 is located in the pin hole of shell 7-1 right side and plug 7-5 pin hole.

[0038] The shell 7-1 is elastic nylon body, and the left side hole is small, and the right side hole is large, and the right side is provided with pin hole matched with plug 7-5;Material is glass fiber filled nylon.

[0039] The piston 7-2 is disc structure, and the left side is provided with step hole.

[0040] The rubber ball 7-3 can be single piece or multiple pieces.

[0041] The elastic cylindrical pin 7-4 is coiled elastic cylindrical pin, and is elastically connected with shell 7-1, plug 7-5 and rear side pipe 10.

[0042] The plug 7-5 is a disc structure, and a stepped hole is arranged at the right side, and a pin hole matched with the shell 7-1 and the rear pipe 10 is arranged at the stepped hole.

[0043] The large clamp 8 is an elastic nylon body, and a single-sided mounting plate wide clamp is arranged, the mounting plate is arranged at the inner side of the bumper, two mounting holes are arranged on the mounting plate, and the material is glass fiber filled nylon.

[0044] The left end of the rear pipe 10 is provided with a pin hole matched with the shell 7-1 and the plug 7-5.

[0045] The small clamp 12 is an elastic nylon body, and a single-sided mounting plate narrow clamp is arranged, the mounting plate is arranged at the inner side of the bumper, one mounting hole is arranged on the mounting plate, and the material is glass fiber filled nylon.

Claims

1. A lightweight, flexible bumper, comprising: The system comprises a front riser, an upper riser, a lower riser, a rear riser, a stiffening plate, a front side riser, a buffer, a large clamp, a large rubber pad, a rear side riser, a small rubber pad, a small clamp, and a horizontal riser. The buffer is connected to the large clamp, and the large rubber pad is between the buffer and the large clamp. The right side of the rear side riser is fitted with a small clamp, and the small rubber pad is between the rear side riser and the small clamp. The horizontal riser is located at the left end of the bumper, with both ends connected to the inner sides of the front risers on both sides. The upper right side of the front riser is connected to the upper left side of the rear riser via the upper riser, and the lower right side of the front riser is connected to the lower left side of the rear riser via the lower riser, forming a triangular structure. The lower right side of the rear riser is connected to the left end of the front riser, and the right side of the rear riser is connected to the upper left side of the front riser via the stiffening plate. The right end of the front riser is fitted into the piston step hole via the left side hole of the buffer, and the buffer plug step hole is fitted into the left end of the rear riser.

2. The lightweight, flexible bumper according to claim 1, characterized in that: The buffer includes: a housing, a piston, a rubber ball, an elastic cylindrical pin, and a plug; the piston is located on the left side of the right side hole of the housing, and the left stepped hole is aligned with the left side hole of the housing; the rubber ball is built into the right side hole of the housing, located on the right side of the piston, the left side of the plug, and inside the large clamp; the plug is sleeved on the right side of the right side hole of the housing, and the elastic cylindrical pin is located in the right side pin hole of the housing and in the pin hole of the plug.

3. A lightweight, flexible bumper according to claim 2, characterized in that: The housing has a smaller hole on the left side and a larger hole on the right side, with a pin hole on the right side for matching the plug.

4. A lightweight, flexible bumper according to claim 3, characterized in that: The plug has a disc structure with a stepped hole on the right side. The stepped hole is equipped with a pin hole that matches the housing and the rear tube.

5. A lightweight, flexible bumper according to claim 4, characterized in that: The left end of the rear tube is provided with a pin hole that matches the housing and the plug.

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