Rear damping folding frame of rectangular pyramid structure

Abstract

The utility model discloses a rear shock absorption folding frame of a rectangular pyramid structure, which comprises a front frame, a middle tube, a rear frame, a shock absorber and a shaft barrel, the front frame is connected with the front side of the middle tube, one end of the shock absorber is hinged with the rear side of the upper part of the middle tube, the axis of the shaft barrel is vertical to the axis of the middle tube and is fixedly welded on the rear side of the bottom end of the middle tube, and the upper side of the rear frame is connected with the other end of the shock absorber. The lower side of the rear frame is rotationally connected with the shaft barrel; the rear frame comprises a left frame and a right frame; the shock absorber comprises a shock absorption head, a shock absorption tail, an elastic body and a bolt shaft rod, the shock absorption head comprises a hollow tubular cylinder body and a hinge joint arranged at one end of the cylinder body, the hinge joint is provided with a hinge through hole and a threaded hole, the axis of the hinge through hole is perpendicular to the axis of the cylinder body, the axis of the threaded hole is coaxial with the axis of the cylinder body, and the shock absorption tail comprises a telescopic pipe and a connecting pipe which are connected in a three-way tubular mode. The strength of the bicycle frame can be guaranteed, and the shock absorption performance of the shock absorber can be well exerted.

Description

Technical Field

[0001] This utility model relates to the technical field of bicycle frames, and in particular to a rear shock-absorbing folding bicycle frame with a four-sided pyramidal structure. Background Technology

[0002] The top of the bicycle's bottom tube connects to the saddle, and the bottom connects to the pedal axles. The frame between the bottom tube and the front wheel is called the front frame, and the frame between the bottom tube and the rear wheel is called the rear frame. Bicycle frame shock absorption is primarily achieved through shock absorbers. The installation location of shock absorbers varies, and the bicycle frame structure and shock absorber installation need to be properly matched to ensure both the frame's strength and the optimal shock absorption performance of the shock absorbers. Utility Model Content

[0003] The purpose of this invention is to optimize the matching structure of bicycle frames and shock absorbers in the existing technology, and to propose a rear shock-absorbing folding frame with a four-sided pyramid structure, which can ensure the strength of the bicycle frame and also better utilize the shock absorption performance of the shock absorber.

[0004] To achieve the above objectives, this utility model proposes a four-sided pyramidal structure rear shock-absorbing folding frame, including a front frame, a center tube, a rear frame, a shock absorber, and an axle cylinder. The front frame is connected to the front side of the center tube. One end of the shock absorber is hinged to the upper rear side of the center tube. The axis of the axle cylinder is perpendicular to the axis of the center tube and welded and fixed to the rear side of the bottom end of the center tube. The upper side of the rear frame is connected to the other end of the shock absorber, and the lower side of the rear frame is rotatably connected to the axle cylinder. The rear frame includes a left frame and a right frame. The shock absorber includes a shock absorber head, a shock absorber tail, an elastic body, and a bolt shaft. The shock absorber head includes a hollow tubular body and a hinge joint at one end of the body. The hinge joint has a hinge through hole and a threaded hole. The axis of the hinge through hole is perpendicular to the axis of the body. The threaded hole axis is coaxial with the cylinder axis. The shock absorber tail includes a telescopic tube and a connecting tube connected in a three-way tubular shape. One end of the telescopic tube is provided with a sealing plate and extends into the shock absorber head cylinder. The sealing plate has a screw through hole in the middle. The other end of the telescopic tube is connected and communicates with the middle of the connecting tube. The connecting tube has an operating through hole on the other side opposite to the connecting telescopic tube. The connecting tube is connected to the upper side of the rear frame. The bolt shaft passes through the operating through hole and is threadedly connected to the threaded hole through the screw through hole to connect the shock absorber tail and the shock absorber head. The elastic body is provided inside the shock absorber head cylinder. The bolt shaft passes through the middle of the elastic body. The two ends of the elastic body are respectively attached to the shock absorber head hinge joint and the sealing plate of the shock absorber tail telescopic tube.

[0005] This design employs an improved shock absorber structure. The shock absorber is located between the rear frame and the center tube. When vibration occurs, the shock absorber rotates around the axle tube as the center of rotation. The rear frame connects to the shock absorber's tail, driving the telescopic tube to extend and retract within the shock absorber's head cylinder. Under the action of the elastic body, the shock absorption effect is achieved. During the extension and retraction of the telescopic tube, the cylinder also has a small rotation angle, which is achieved through the hinge joint with the center tube. The rear frame includes the left frame and the right frame. The end faces of the left and right frames that are close to the center tube, the center tube, the shock absorber, and the axle tube form a four-sided pyramid-like structure, including a top shock-absorbing surface, a right-side force-generating surface, a left-side force-generating surface, and a bottom bearing surface. This is a relatively stable structure, and the shock absorber can also perform well in terms of shock absorption.

[0006] In a preferred embodiment of this invention, the top of the left and right frames near the center tube are connected by two fixing plates. The connecting tube of the shock absorber tail is located between the two fixing plates and connected to them. The bottom of the left and right frames near the center tube are respectively provided with axle lugs, which are connected to both ends of the axle cylinder. In this design, the left and right frames near the center tube are vertically connected, resulting in a robust and strong structure.

[0007] In a preferred embodiment of this utility model, the left frame includes a left upper fork, a left insert, a left lower fork, and a left connecting rod; the right frame includes a right upper fork, a right insert, a right lower fork, and a right connecting rod. One end of the left upper fork and the left lower fork are connected via the left insert, and the other end of the left upper fork is connected to one end of the left connecting rod. The other ends of the left lower fork and the left connecting rod are each connected to a lug. One end of the right upper fork and the right lower fork are connected via the right insert, and the other end of the right upper fork is connected to one end of the right connecting rod. The other ends of the right lower fork and the right connecting rod are each connected to another lug. The connection ends of the left upper fork and the left connecting rod, and the connection ends of the right upper fork and the right connecting rod are connected to each other via two fixing plates.

[0008] In a preferred embodiment of this invention, a mounting seat is provided at the hinge point between the upper rear side of the middle tube and the rear frame. The mounting seat has a U-shaped groove, and the hinge joint is located in the U-shaped groove and hinged to the mounting seat via a pin. In this embodiment, the mounting seat is welded and fixed to the middle tube, and the hinge joint is inserted into the U-shaped groove on the mounting seat and then connected by a pin, so that the hinge joint and the mounting seat form a hinge, and the hinge joint can rotate.

[0009] In a preferred embodiment of this invention, a foot support is provided at the bottom of the rear frame near the center tube. This foot support serves two purposes: firstly, it connects to the foot support; secondly, it acts as a reinforcing plate connecting to the bottom of the rear frame, thus structurally strengthening the bottom of the rear frame.

[0010] In a preferred embodiment of this utility model, the rear frame has axle lugs on both sides of its lower side. These lugs are respectively fitted against both sides of the axle cylinder and rotatably connected to the cylinder via a set of locking screws. Each locking screw includes a first connecting sleeve, a second connecting sleeve, and a fixing bolt. The first and second connecting sleeves extend into the cylinder from both sides, and the fixing bolt passes through either the first or second connecting sleeve and is threadedly fixed to the other connecting sleeve. In this embodiment, the first and second connecting sleeves are fixedly connected to the axle lugs, and the fixing bolt connects them together. The first and second connecting sleeves are rotatably connected to the axle cylinder, allowing the rear frame to rotate at a small angle around the axle cylinder, thus cooperating with the shock absorber to achieve a shock absorption effect.

[0011] In a preferred embodiment of this invention, the elastic body is a compression spring or an elastic rubber sleeve. Both the compression spring and the elastic rubber sleeve have a through hole in the middle, facilitating the passage of the bolt shaft for threaded connection with the hinge joint. Both the compression spring and the elastic rubber sleeve are commonly used elastic materials.

[0012] The beneficial effects of this invention are: it can ensure the strength of the bicycle frame and also better utilize the shock absorption performance of the shock absorber.

[0013] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of this utility model.

[0015] Figure 2 This is an exploded view of the structure of this utility model.

[0016] Figure 3 This is a schematic diagram of the constituent surfaces of the triangular pyramid structure of this utility model.

[0017] Figure 4 This is a three-dimensional structural diagram of the shock absorber of this utility model.

[0018] Figure 5 This is an exploded structural diagram of the shock absorber of this utility model.

[0019] Figure 6 This is a cross-sectional structural diagram of the shock absorber of this utility model.

[0020] In the diagram: 1-Front frame, 2-Side tube, 3-Rear frame, 4-Shock absorber, 5-Axle, 6-Left side frame, 7-Right side frame, 8-Fixed plate, 9-Axle lug, 10-Mounting seat, 11-Pin, 12-Foot support, 41-Shock absorber head, 42-Shock absorber tail, 43-Elastomer, 44-Bolt shaft, 51-First connecting sleeve, 52-Second connecting sleeve, 53-Fixing bolt, 61-Left upper fork, 62-Left... Insert plate, 63-lower left fork, 64-left connecting rod, 71-upper right fork, 72-right insert plate, 73-lower right fork, 74-right connecting rod, 301-top damping surface, 302-right side force-generating surface, 303-left side force-generating surface, 304-bottom bearing surface, 411-cylinder body, 412-hinged joint, 413-hinged through hole, 414-threaded hole, 421-telescopic tube, 422-connecting tube, 423-operating through hole. Detailed Implementation

[0021] See Figures 1-6 This utility model provides the following technical solution:

[0022] A four-sided pyramidal structure rear shock-absorbing folding frame includes a front frame 1, a middle tube 2, a rear frame 3, a shock absorber 4, and an axle cylinder 5. The front frame 1 is connected to the front side of the middle tube 2. One end of the shock absorber 4 is hinged to the upper rear side of the middle tube 2. The axis of the axle cylinder 5 is perpendicular to the axis of the middle tube 2 and welded and fixed to the rear side of the bottom end of the middle tube 2. The upper side of the rear frame 3 is connected to the other end of the shock absorber 4, and the lower side of the rear frame 3 is rotatably connected to the axle cylinder 5. The rear frame 3 includes a left frame 6 and a right frame 7. The shock absorber 4 includes a shock absorber head 41, a shock absorber tail 42, an elastic body 43, and a bolt shaft 44. The shock absorber head 41 includes a hollow tubular body 411 and a hinge joint 412 located at one end of the body 411. The hinge joint 412 has a hinge through hole 413 and a threaded hole 414. The axis of the hinge through hole 413 is perpendicular to the axis of the body 411, and the axis of the threaded hole 414 is perpendicular to the axis of the body 411. The shock absorber tail 42 is coaxial and includes a telescopic tube 421 and a connecting tube 422 connected in a three-way tubular shape. One end of the telescopic tube 421 is provided with a sealing plate and extends into the cylinder 411 of the shock absorber head 41. A screw through hole is provided in the middle of the sealing plate. The other end of the telescopic tube 421 is connected and communicates with the middle of the connecting tube 422. An operation through hole 423 is provided on the other side of the connecting tube 422 opposite to one side of the connecting telescopic tube 421. The connecting tube 422 is connected to the upper side of the rear frame 3. The bolt shaft 44 passes through the operation through hole 423 and is threadedly connected to the threaded hole 414 through the screw through hole to connect the shock absorber tail 42 and the shock absorber head 41. An elastic body 43 is provided in the cylinder 411 of the shock absorber head 41. The bolt shaft 44 passes through the middle of the elastic body 43. The two ends of the elastic body 43 are respectively attached to the hinge joint 412 of the shock absorber head 41 and the sealing plate of the telescopic tube 421 of the shock absorber tail 42.

[0023] The left side frame 6, the right side frame 7 of the rear frame 3, the end faces of the center tube 2 that are close to the center tube 2, the center tube 2, the shock absorber 4, and the axle tube 5 form a four-faced pyramid-like structure, including the top shock-absorbing surface 301, the right side force-generating surface 302, the left side force-generating surface 303, and the bottom bearing surface 304.

[0024] The top of the left frame 6 and the right frame 7 near the center tube 2 are connected by two fixing plates 8. The connecting tube 422 of the shock absorber tail 42 is located between the two fixing plates 8 and connected to the two fixing plates 8. The bottom of the left frame 6 and the right frame 7 near the center tube 2 are respectively provided with axle lugs 9, which are respectively connected to both ends of the axle tube 5.

[0025] The left frame 6 includes a left upper fork 61, a left insert 62, a left lower fork 63, and a left connecting rod 64. The right frame 7 includes a right upper fork 71, a right insert 72, a right lower fork 73, and a right connecting rod 74. One end of the left upper fork 61 and the left lower fork 63 are connected by the left insert 62, and the other end of the left upper fork 61 is connected to one end of the left connecting rod 64. The other ends of the left lower fork 63 and the left connecting rod 64 are each connected to a lug 9. One end of the right upper fork 71 and the right lower fork 73 are connected by the right insert 72, and the other end of the right upper fork 71 is connected to one end of the right connecting rod 74. The other ends of the right lower fork 73 and the right connecting rod 74 are each connected to another lug 9. The connection ends of the left upper fork 61 and the left connecting rod 64, and the connection ends of the right upper fork 71 and the right connecting rod 74 are connected to each other by two fixing plates 8.

[0026] A mounting seat 10 is provided at the hinge point between the upper rear side of the middle tube 2 and the rear frame 3. The mounting seat 10 is provided with a U-shaped groove. The hinge joint 412 is located in the U-shaped groove and is hinged to the mounting seat 10 through the pin 11.

[0027] The rear frame 3 is equipped with a foot support 12 near the bottom of the center tube 2.

[0028] The rear frame 3 has axle lugs 9 on both sides of its lower side. The axle lugs 9 are respectively attached to both sides of the axle cylinder 5 and are rotatably connected to the axle cylinder 5 through a set of male and female locking screws. The male and female locking screws include a first connecting sleeve 51, a second connecting sleeve 52, and a fixing bolt 53. The first connecting sleeve 51 and the second connecting sleeve 52 extend into the sleeve 5 from both sides of the sleeve 5, and the fixing bolt 53 passes through the first connecting sleeve 51 or the second connecting sleeve 52 and is threadedly fixed to the other connecting sleeve.

[0029] The elastomer 43 is a compression spring or an elastic rubber sleeve.

[0030] The working process of this utility model:

[0031] The shock absorber 4 is located between the rear frame 3 and the center tube 2. When vibration occurs, the rear frame 3 is connected to the shock absorber tail 42 with the axle cylinder 5 as the rotation center. This drives the telescopic tube 421 to extend and retract within the shock absorber head 41 cylinder 411. Under the action of the elastic body 43, the shock absorption effect is achieved. When the telescopic tube 421 extends and retracts, the cylinder 411 will also have a small rotation angle. The small angle rotation is achieved through the hinge joint 412 and the hinge of the center tube 2.

[0032] The first connecting sleeve 51 and the second connecting sleeve 52 are fixedly connected to the axle lug 9, and the fixing bolt 53 connects the first connecting sleeve 51 and the second connecting sleeve 52 together. The first connecting sleeve 51 and the second connecting sleeve 52 are rotatably connected to the axle cylinder 5, so that the rear frame 3 can rotate at a small angle with the axle cylinder 5 as the rotation point, and cooperate with the shock absorber 4 to achieve the shock absorption effect.

[0033] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A rear shock-absorbing folding frame with a quadrangular pyramidal structure, characterized in that: The vehicle includes a front frame, a center tube, a rear frame, a shock absorber, and an axle. The front frame is connected to the front side of the center tube. One end of the shock absorber is hinged to the upper rear side of the center tube. The axis of the axle is perpendicular to the axis of the center tube and is welded and fixed to the rear side of the bottom end of the center tube. The upper side of the rear frame is connected to the other end of the shock absorber. The lower side of the rear frame is rotatably connected to the axle. The rear frame includes a left frame and a right frame. The shock absorber includes a shock absorber head, a shock absorber tail, an elastomer, and a bolt shaft. The shock absorber head includes a hollow tubular body and a hinge joint at one end of the body. The hinge joint has a hinge through hole and a threaded hole. The axis of the hinge through hole is perpendicular to the axis of the body, and the axis of the threaded hole is coaxial with the axis of the body. The shock absorber tail includes a telescopic tube and a connecting tube connected in a three-way tubular shape. One end of the telescopic tube has a sealing plate that extends into the shock absorber head body. The sealing plate has a screw through hole in the middle. The other end of the telescopic tube is connected to and communicates with the middle of the connecting tube. The connecting tube has an operating through hole on the opposite side of the connecting telescopic tube. The connecting tube is connected to the upper side of the rear frame. The bolt shaft passes through the operating through hole and is threadedly connected to the threaded hole through the screw through hole to connect the shock absorber tail and the shock absorber head. The elastomer is located inside the shock absorber head body. The bolt shaft passes through the middle of the elastomer. Both ends of the elastomer are respectively attached to the shock absorber head hinge joint and the shock absorber tail telescopic tube sealing plate.

2. The rear shock-absorbing folding frame with a quadrangular pyramid structure as described in claim 1, characterized in that: The left and right frames are connected to each other at the top of the side near the center tube by two fixing plates. The connecting tube of the shock absorber tail is located between the two fixing plates and connected to the two fixing plates. The bottom of the left and right frames near the center tube are respectively provided with axle lugs, which are respectively connected to both ends of the axle cylinder.

3. A rear shock-absorbing folding frame with a quadrangular pyramid structure as described in claim 1 or 2, characterized in that: The left frame includes a left upper fork, a left insert, a left lower fork, and a left connecting rod. The right frame includes a right upper fork, a right insert, a right lower fork, and a right connecting rod. One end of the left upper fork and the left lower fork are connected by the left insert, and the other end of the left upper fork is connected to one end of the left connecting rod. The other ends of the left lower fork and the left connecting rod are each connected to an axle. One end of the right upper fork and the right lower fork are connected by the right insert, and the other end of the right upper fork is connected to one end of the right connecting rod. The other ends of the right lower fork and the right connecting rod are each connected to another axle. The connection ends of the left upper fork and the left connecting rod, and the connection ends of the right upper fork and the right connecting rod are connected to each other by two fixing plates.

4. The rear shock-absorbing folding frame with a quadrangular pyramid structure as described in claim 1, characterized in that: The upper rear side of the middle tube is provided with a mounting seat at the hinge point with the rear frame. The mounting seat is provided with a U-shaped groove. The hinge joint is located in the U-shaped groove and is hinged to the mounting seat by a pin.

5. A rear shock-absorbing folding frame with a quadrangular pyramid structure as described in claim 1, characterized in that: The rear frame is equipped with foot support seats near the bottom of the center tube.

6. The rear shock-absorbing folding frame with a quadrangular pyramid structure as described in claim 1, characterized in that: The rear frame has axle lugs on both sides of its lower side. The axle lugs are respectively close to both sides of the axle cylinder and are rotatably connected to the axle cylinder by a set of male and female locking screws. The male and female locking screws include a first connecting sleeve, a second connecting sleeve, and a fixing bolt. The first connecting sleeve and the second connecting sleeve extend into the sleeve from both sides of the sleeve. The fixing bolt passes through the first connecting sleeve or the second connecting sleeve and is threadedly fixed to the other connecting sleeve.

7. A rear shock-absorbing folding frame with a quadrangular pyramid structure as described in claim 1, characterized in that: The elastic body is a compression spring or an elastic rubber sleeve.

Images