Three-split die-casting forming type folding damping frame
The folding shock-absorbing frame, formed by three-part die casting, solves the aesthetic and fatigue problems caused by welded joints, achieving high mechanical strength, long service life, and comfortable shock absorption, thus improving the safety and riding experience of the bicycle.
Patent Information
- Application Number
- CN202423237286.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-17
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2034-12-17
AI Technical Summary
The welded joints of existing folding bicycle frames result in poor overall aesthetics, stress concentration, low fatigue resistance, short service life, and potential safety hazards.
The folding shock-absorbing frame is made of three parts by die casting. The front frame, middle frame and rear frame are independent structural components, connected by pins and buckles. The middle frame and rear frame are connected by gas springs to achieve integral die casting, which has high mechanical strength and comfortable shock absorption.
This design achieves high mechanical strength and long service life for the frame, convenient and quick folding, and reliable shock absorption, thus improving safety and riding comfort.
Smart Images
Figure CN223736179U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a bicycle technical field, concretely relates to a three-part die-casting forming type folding shock-absorbing frame. BACKGROUND
[0002] The bicycle is a kind of green traffic tool, and is also a kind of sports fitness equipment.The bicycle is in huge demand at home and abroad.Folding bicycle is very suitable for commuting riding in busy city because of small and foldable body, easy to carry, and brings people different riding feeling, and audience is very extensive.
[0003] The production process of the existing folding bicycle frame is single-piece machining integral welding process, first, head tube, crossbeam, vertical tube, flat tube, rear fork and other parts are separately machined, then head tube, crossbeam, vertical tube, flat tube, rear fork and other parts are welded together to constitute folding bicycle frame.The existing folding bicycle frame production process method makes the frame itself produce many welding joints, welding joints not only affect the overall aesthetic degree of bicycle, but also the microstructure of heat-affected zone of welding joint is very uneven, there is stress concentration, and welding seam electric corrosion becomes the failure source of the whole frame, these welding joints are damaged in advance in subsequent quality test and use, and the anti-fatigue and anti-damage performance is low, service life is short, and it brings safety hazard to rider. SUMMARY
[0004] The utility model aims at solving the deficiency existing in prior art, provide a three-part die-casting forming type folding shock-absorbing frame, three-part structure is simple and novel, can be die-casting forming once, and mechanical strength is high, and service life is long, and folding shock-absorbing overall structure design is reasonable, and folding is convenient and fast, and shock-absorbing is comfortable and reliable, and use safety is high.
[0005] The utility model discloses a technical scheme is: a three -part body die casting forming type folding shock absorbing frame, including front frame body 1, middle frame body 2 and rear frame body 3, front frame body 1 includes head tube 11 and long crossbeam 12, and the shape of long crossbeam 12 is " Y " character, and its front end is equipped with upper front end and lower front end, and head tube 11 is arranged at the front end of long crossbeam 12, is connected with the upper front end and lower front end of long crossbeam 12, and the rear end surface of long crossbeam 12 is provided with positioning hole 13, and the shape of middle frame body 2 is triangle, including vertical tube 21, short crossbeam 22, inclined beam 23 and flat tube 24, and the rear end of short crossbeam 22 is connected with the middle part front side of vertical tube 21, and the front end of inclined beam 23 is connected with the front end lower side of short crossbeam 22, and the rear end is connected with the lower part front side of vertical tube 21, and flat tube 24 is arranged at the rear end lower side of inclined beam 23, and is connected with the lower part front side of vertical tube 21, and the middle part rear side of vertical tube 21 is provided with upper hinge block 26, and the lower part rear side is provided with two lower hinge plates 27, and the front end surface of short crossbeam 22 is provided with the positioning block 25 matched with positioning hole 13, and rear frame body 3 includes vertical fork 31 and flat fork 32, and the shape of vertical fork 31 and flat fork 32 is all " V " character, and the front end of flat fork 32 is provided with connecting pipe 33, and the rear end of vertical fork 31 is connected with the rear end of flat fork 32 correspondingly, and the front end of vertical fork 31 is connected with the front end of flat fork 32 through two connecting web plates 34, and front frame body 1 is installed at the front of middle frame body 2, and the rear end of long crossbeam 12 and the front end one side of short crossbeam 22 are provided with pin shaft 4, are used for hinged connection, and the other side is provided with lock catch 5, is used for locking connection, and rear frame body 3 is installed at the rear of middle frame body 2, and gas spring 6 is installed between upper hinge block 26 and connecting web plate 34, and the both ends of gas spring 6 are hinged connection with upper hinge block 26 and connecting web plate 34 respectively, and connecting pipe 33 is inserted and installed between two lower hinge plates 27, and is rotatably connected through connecting shaft body 7.
[0006] Further improvement lies in that the connecting shaft body 7 comprises rotating shaft sleeves 71, connecting shaft sleeves 72, fastening screws 73 and fastening nuts 74, one side of the rotating shaft sleeve 71 is provided with a flange, the two rotating shaft sleeves 71 are respectively inserted into the two ends of the connecting pipe 33, the flanges of the rotating shaft sleeves 71 are respectively in contact with the end faces of the connecting pipe 33 and the inner side faces of the lower hinge plates 27, one side of the connecting shaft sleeve 72 is provided with a flange, the two connecting shaft sleeves 72 are respectively inserted into the holes of the lower hinge plates 27 and the holes of the rotating shaft sleeves 71, the flange of the connecting shaft sleeve 72 is in contact with the outer side faces of the lower hinge plates 27, the fastening screws 73 are inserted and installed into the holes of the two connecting shaft sleeves 72 and are in threaded connection with the fastening nuts 74.
[0007] Compared with the prior art, the utility model has the following beneficial effects: the three-part body structure is simple and novel, can be die casting formed at one time, has high mechanical strength, long service life, reasonable overall structure design, convenient folding, comfortable and reliable shock absorption, and high safety in use. BRIEF DESCRIPTION OF DRAWINGS
[0008] Figure 1 This is a schematic diagram of the structure of this utility model.
[0009] Figure 2 This is a three-dimensional structural diagram of the present invention.
[0010] Figure 3 This is a three-dimensional structural diagram of the front frame of this utility model.
[0011] Figure 4 This is a three-dimensional structural diagram of the frame in this utility model.
[0012] Figure 5 This is a three-dimensional structural diagram of the rear frame of this utility model.
[0013] Figure 6 for Figure 1 AA section view in the image. Detailed Implementation
[0014] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.
[0015] like Figures 1 to 6 As shown, a three-part die-cast folding shock-absorbing frame includes a front frame 1, a middle frame 2, and a rear frame 3. The front frame 1 includes a head tube 11 and a long crossbeam 12. The long crossbeam 12 is Y-shaped, with an upper front end and a lower front end. The head tube 11 is located at the front end of the long crossbeam 12 and connects to the upper and lower front ends of the long crossbeam 12. A positioning hole 13 is provided on the rear end face of the long crossbeam 12. A front hinge mounting block and a front locking mounting block are respectively provided on both sides of the rear end of the long crossbeam 12.
[0016] The frame 2 is triangular in shape and includes a vertical pipe 21, a short crossbeam 22, a diagonal beam 23, and a horizontal pipe 24. The rear end of the short crossbeam 22 is connected to the front middle section of the vertical pipe 21. The front end of the diagonal beam 23 is connected to the lower front end of the short crossbeam 22, and the rear end is connected to the lower front section of the vertical pipe 21. The horizontal pipe 24 is located on the lower rear end of the diagonal beam 23 and is connected to the lower front section of the vertical pipe 21. An upper hinge block 26 is provided on the rear middle section of the vertical pipe 21, and two lower hinge plates 27 are symmetrically arranged on the rear lower section. A positioning block 25 matching the positioning hole 13 is provided on the front end face of the short crossbeam 22. A rear hinge mounting block and a rear locking mounting block are respectively provided on both sides of the front end of the short crossbeam 22.
[0017] The rear frame 3 includes a vertical fork 31 and a horizontal fork 32. Both the vertical fork 31 and the horizontal fork 32 are V-shaped. A connecting pipe 33 is provided at the front end of the horizontal fork 32. The rear end of the vertical fork 31 is connected to the rear end of the horizontal fork 32. The front end of the vertical fork 31 is connected to the front end of the horizontal fork 32 through two connecting stiffeners 34.
[0018] The front frame 1 is installed in front of the middle frame 2. A pin 4 is installed on one side of the rear end of the long crossbeam 12 and the front end of the short crossbeam 22 for hinged connection, and a latch 5 is installed on the other side for locking connection. The pin 4 is installed on the front hinge mounting block and the rear hinge mounting block, and the latch 5 is installed on the front latch mounting block and the rear latch mounting block. The rear frame 3 is installed behind the middle frame 2. A gas spring 6 is installed between the upper hinge block 26 and the connecting stiffener 34. The two ends of the gas spring 6 are hinged to the upper hinge block 26 and the connecting stiffener 34 respectively. A connecting pipe 33 is inserted between the two lower hinge plates 27 and rotatably connected via a connecting shaft 7. Body 7 includes a rotating bushing 71, a connecting bushing 72, a fastening screw 73, and a fastening nut 74. The rotating bushing 71 has a flange on one side. The two rotating bushings 71 are respectively inserted into the two ends of the connecting pipe 33. The flanges of the rotating bushings 71 are in contact with the end face of the connecting pipe 33 and the inner side of the lower hinge plate 27, respectively. The connecting bushing 72 has a flange on one side. The two connecting bushings 72 are respectively inserted into the hole of the lower hinge plate 27 and the hole of the rotating bushing 71. The flange of the connecting bushing 72 is in contact with the outer side of the lower hinge plate 27. The fastening screw 73 is inserted into the holes of the two connecting bushings 72 and threadedly connected to the fastening nut 74.
[0019] The front frame 1, middle frame 2, and rear frame 3 are three independent structural components. The structural design of the front frame 1, middle frame 2, and rear frame 3 is reasonable. Each structural component can be die-cast in one go, resulting in high mechanical strength and long service life.
[0020] The front frame 1 and the middle frame 2 are hinged on one side by a pin 4 and locked on the other side by a latch 5. When locked, the positioning block 25 is inserted into the positioning hole 13, making folding convenient and quick, and the connection firm and reliable. The upper ends of the middle frame 2 and the rear frame 3 are connected by a gas spring 6, and the lower ends are connected by a connecting shaft 7. The elastic rotation provides shock absorption, comfort and reliability, high safety, and good riding comfort.
[0021] However, this is not the only possibility. Any variations or substitutions conceived without inventive effort should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope defined in the claims.
Claims
1. A three-piece die-cast type folding shock absorbing frame, characterized by, The utility model provides a kind of frame, including front frame body (1), middle frame body (2) and rear frame body (3), front frame body (1) includes head tube (11) and long crossbeam (12), long crossbeam (12) is "Y” shape, its front end is equipped with upper front end and lower front end, head tube (11) is arranged at the front end of long crossbeam (12), and is connected with the upper front end and lower front end of long crossbeam (12), positioning hole (13) is arranged on the rear end surface of long crossbeam (12), middle frame body (2) is triangle, including vertical tube (21), short crossbeam (22), inclined beam (23) and flat tube (24), the rear end of short crossbeam (22) is connected with the middle part front side of vertical tube (21), the front end of inclined beam (23) is connected with the front end lower side of short crossbeam (22), and the rear end is connected with the lower part front side of vertical tube (21), flat tube (24) is arranged at the rear end lower side of inclined beam (23), and is connected with the lower part front side of vertical tube (21), the middle part rear side of vertical tube (21) is equipped with upper hinge block (26), and the lower part rear side is symmetrically equipped with two lower hinge plates (27), the front end surface of short crossbeam (22) is equipped with positioning block (25) matched with positioning hole (13), rear frame body (3) includes vertical fork (31) and flat fork (32), and the shape of vertical fork (31) and flat fork (32) is all "V” shape, the front end of flat fork (32) is equipped with connecting pipe (33), and the rear end of vertical fork (31) is connected with the rear end of flat fork (32) correspondingly, the front end of vertical fork (31) is connected with the front end of flat fork (32) by two connecting web plates (34), front frame body (1) is installed in the front of middle frame body (2), and the rear end of long crossbeam (12) is installed with pin shaft (4) on one side of the front end of short crossbeam (22), for hinged connection, and is installed with lock catch (5) on the other side, for locking connection, rear frame body (3) is installed in the rear of middle frame body (2), and gas spring (6) is installed between upper hinge block (26) and connecting web plate (34), and the two ends of gas spring (6) are hingedly connected with upper hinge block (26) and connecting web plate (34) respectively, connecting pipe (33) is inserted and installed between two lower hinge plates (27), and is rotatably connected by connecting shaft body (7).
2. The tri-tube die-cast type folding shock absorbing frame according to claim 1, wherein Connecting shaft body (7) includes rotating shaft sleeve (71), connecting shaft sleeve (72), fastening screw (73) and fastening nut (74), one side of rotating shaft sleeve (71) is equipped with flange, two rotating shaft sleeves (71) are inserted in the two ends of connecting pipe (33) respectively, the flange of rotating shaft sleeve (71) is in contact with the end surface of connecting pipe (33) and the inner side of lower hinge plate (27) respectively, one side of connecting shaft sleeve (72) is equipped with flange, two connecting shaft sleeves (72) are inserted in the hole of lower hinge plate (27) and the hole of rotating shaft sleeve (71) respectively, the flange of connecting shaft sleeve (72) is in contact with the outer side of lower hinge plate (27), fastening screw (73) is inserted and installed in the hole of two connecting shaft sleeves (72), and is threadedly connected with fastening nut (74).