Suspension fork

Abstract

The utility model provides a kind of shock-absorbing front fork, including crossbeam;Frame head tube is formed by the top of crossbeam extending upwards;First fork arm, including first left front fork arm and first right front fork arm being opposite interval arrangement, respectively fixed in the two ends of crossbeam and by the two ends of crossbeam obliquely extend downwards;Second fork arm, including second left front fork arm and second right front fork arm being opposite interval arrangement, respectively with the one end of first left front fork arm, first right front fork arm away from crossbeam articulates;Shock absorber, including two, each shock absorber is inclined to be arranged relative to horizontal surface, two ends of one shock absorber are respectively fixedly connected to first left front fork arm and second left front fork arm, two ends of another shock absorber are respectively fixedly connected to first right front fork arm and second right front fork arm;The distance of the two ends of crossbeam to corresponding side two fork grooves is all greater than the length of corresponding side shock absorber. Compared with related art, the shock-absorbing front fork of the utility model is low in cost and long in service life.

Description

Technical Field

[0001] This utility model relates to the field of shock absorption device technology, and in particular to a shock-absorbing front fork used in scooters, bicycles, electric bicycles, etc., between the wheels and the head tube of the frame. Background Technology

[0002] As an important shock-absorbing component for scooters, electric bicycles, and bicycles, the shock-absorbing fork is also generally called a dual-spring shock absorber. It is used to connect the two ends of the wheel axle to the head tube of the frame, forming an elastic mechanism to absorb vibrations and reduce the bumpy feeling when riding, thereby improving riding comfort.

[0003] The existing shock-absorbing forks are mainly dual-tube front shock-absorbing forks with a portal frame structure, including a horizontally arranged crossbeam, a head tube extending from the top of the crossbeam for connecting to the head of the frame, two connecting tubes extending vertically downward from both ends of the crossbeam, and two spring shock absorbers. The two ends of each spring shock absorber are respectively connected to one end of the wheel axle and one of the connecting tubes.

[0004] However, the current technology of shock-absorbing forks has a near-vertical design for the buffer travel. This requires a longer structure to achieve specific buffer distances and effects, thus limiting the overall frame design space. This leads to more considerations regarding style, materials, and rigidity, resulting in higher production costs. Furthermore, the near-vertical design requires a longer buffer distance, which, for specific buffer effects, results in a longer spring travel and a larger piston distance, leading to durability issues. When the wheel hits an obstacle or uneven surfaces, the force applied in directions other than the spring travel direction can directly and rigidly damage the shock absorber's spring structure, affecting its lifespan.

[0005] Therefore, it is necessary to provide a new shock-absorbing fork to solve the above problems. Utility Model Content

[0006] This invention aims to solve at least one of the problems existing in the prior art, and to provide a shock-absorbing fork with low production cost and long service life.

[0007] To solve the above-mentioned technical problems, this utility model provides a shock-absorbing front fork, comprising:

[0008] beam;

[0009] A head tube, which extends upward from the top of the crossbeam;

[0010] The first front fork arm includes a first left front fork arm and a first right front fork arm that are arranged opposite each other at intervals. The first left front fork arm and the first right front fork arm are respectively fixed to both ends of the crossbeam and extend downward at an angle from both ends of the crossbeam.

[0011] The second front fork arm includes a second left front fork arm and a second right front fork arm arranged opposite each other at intervals. The top end of the second left front fork arm is hinged to the end of the first left front fork arm away from the crossbeam, and the top end of the second right front fork arm is hinged to the end of the first right front fork arm away from the crossbeam. The tail ends of the second left and second right front fork arms respectively form fork grooves for assembly with the wheel axle; and...

[0012] The shock absorber comprises two shock absorbers, each of which is inclined relative to the horizontal plane. One shock absorber is fixedly connected at both ends to the first left front fork arm and the second left front fork arm, respectively, and the other shock absorber is fixedly connected at both ends to the first right front fork arm and the second right front fork arm, respectively. The distance from both ends of the crossbeam to the two fork slots on the corresponding sides is greater than the length of the shock absorber on the corresponding side.

[0013] Preferably, the shock absorber is a spring shock absorber.

[0014] Preferably, both the second left front fork arm and the second right front fork arm are provided with through-holes for installing decorative covers.

[0015] Preferably, the crossbeam, the frame head tube, and the first front fork arm are integrally formed.

[0016] Preferably, the first left front fork arm, the first right front fork arm, the second left front fork arm, and the second right front fork arm are all sheet-like structures.

[0017] Preferably, the two ends of the shock absorber are fixed to the first front fork arm and the second front fork arm with bolts, respectively.

[0018] Compared with the prior art, the shock-absorbing fork of this utility model designs the first and second fork arms as a C-shaped structure that is hinged to each other, and then fixes the two ends of the shock absorber to the first and second fork arms respectively. The distance from the two ends of the crossbeam to the two fork slots on the corresponding sides is greater than the length of the shock absorber on the corresponding side. This structural design makes the shock absorber not nearly perpendicular to the ground but in an inclined state relative to the horizontal plane. Therefore, the cushioning stroke does not come directly from the wheel. So no matter what direction the wheel is subjected to force, such as hitting obstacles or uneven roads, it will not damage the shock absorber. The force points at both ends of the spring stroke of the shock absorber remain unchanged, which improves the durability of the shock absorber. At the same time, because the two ends of the shock absorber are installed in a non-vertical position, and the first and second fork arms are both plate structures, not only can bolt fixing be used to improve structural reliability, but also space is utilized more fully and less material is used, effectively reducing production costs. Attached Figure Description

[0019] The present invention will now be described in detail with reference to the accompanying drawings. The above and other aspects of the present invention will become clearer and easier to understand through the detailed description in conjunction with the following drawings. In the drawings:

[0020] Figure 1 This is a three-dimensional structural diagram of an embodiment of the shock-absorbing front fork of this utility model;

[0021] Figure 2 This is a schematic diagram illustrating the application scenario of the shock-absorbing front fork of this utility model in a scooter. Detailed Implementation

[0022] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0023] The specific embodiments / exemplifications described herein are specific implementations of this utility model, used to illustrate the concept of this utility model, and are illustrative and exemplary, and should not be construed as limiting the implementation methods or scope of this utility model. In addition to the embodiments described herein, those skilled in the art can employ other obvious technical solutions based on the content disclosed in the claims and specification of this application. These technical solutions include those employing any obvious substitutions and modifications to the embodiments described herein, all of which are within the protection scope of this utility model.

[0024] The following descriptions of the embodiments are with reference to the accompanying drawings, illustrating specific embodiments in which the present invention can be implemented. Directional terms used in this invention, such as up, down, front, back, left, right, inside, outside, side, etc., are only for reference to the accompanying drawings. Therefore, the directional terms used are for illustration and understanding of the present invention, and not for limiting the present invention.

[0025] Please refer to Figure 1-2 As shown, this utility model provides a shock-absorbing front fork 100, including: a crossbeam 1, a frame head tube 2, a first fork arm 3, a second fork arm 4, and a shock absorber 5.

[0026] The crossbeam 1 is a horizontally arranged sheet structure.

[0027] The frame head tube 2 is formed by extending upward from the top of the crossbeam 1 and is used to connect the frame head.

[0028] The first front fork arm 3 includes a first left front fork arm 31 and a first right front fork arm 32 that are arranged opposite each other at intervals. The first left front fork arm 31 and the first right front fork arm 32 are respectively fixed to both ends of the crossbeam 1 and extend downward at an incline from both ends of the crossbeam 1. Thus, the first left front fork arm 31 and the first right front fork arm 32 extend not perpendicular to the ground or extend not nearly perpendicular to the ground.

[0029] The second front fork arm 4 includes a second left front fork arm 41 and a second right front fork arm 42 arranged opposite each other. The top end of the second left front fork arm 41 is hinged to the end of the first left front fork arm 31 away from the crossbeam 1, and the top end of the second right front fork arm 42 is hinged to the end of the first right front fork arm 32 away from the crossbeam 1. This makes the first front fork arm 3 and the second front fork arm 4 form a C-shaped structure, and the hinge point where they connect is the bend point.

[0030] The tail ends of the second left front fork arm 41 and the tail ends of the second right front fork arm 42 respectively form fork grooves 43 for assembly with the wheel axle.

[0031] The shock absorber 5 comprises two units, each of which is inclined relative to the horizontal plane. One shock absorber 5 has its two ends fixedly connected to the first left front fork arm 31 and the second left front fork arm 41, respectively, while the other shock absorber 5 has its two ends fixedly connected to the first right front fork arm 32 and the second right front fork arm 42, respectively. The distances from both ends of the crossbeam 1 to the corresponding fork slots 43 are both greater than the length of the corresponding shock absorber 5. Therefore, this structural design ensures that the shock absorber 5 is not nearly perpendicular to the ground but is inclined relative to the horizontal plane. Consequently, the cushioning stroke does not come directly from the wheel, so regardless of the direction of force applied to the wheel, such as impacts with obstacles or uneven roads, the shock absorber 5 will not be damaged. The force points at both ends of the spring stroke of the shock absorber 5 remain constant, improving the durability of the shock absorber 5. It should be noted that this utility model uses the left and right sides as a reference from a normal driving perspective, and corresponding sides are considered to be the same side. For example, the left end of the first left front fork arm 31, the second left front fork arm 41, and the crossbeam 1 are considered to be the same side. The right end of the first right front fork arm 32, the second right front fork arm 42, and the crossbeam 1 are considered to be the same side.

[0032] In this embodiment, the shock absorber 5 is preferably a spring shock absorber. Specifically, both ends of the shock absorber 5 are fixed to the first front fork arm 3 and the second front fork arm 4 with bolts, respectively. That is, both ends of one shock absorber 5 are fixed to the first left front fork arm 31 and the second left front fork arm 41 with bolts, and both ends of the other shock absorber 5 are fixed to the first right front fork arm 32 and the second right front fork arm 42 with bolts, forming a double shock absorption structure. Compared with the vertically arranged double-tube spring shock absorber in the prior art, which cannot meet the bolt fixing method due to its vertical design, the bolt fixing method of the shock absorber 5 of this utility model further improves the structural durability.

[0033] More preferably, in this embodiment, the first left front fork arm 31, the first right front fork arm 32, the second left front fork arm 41, and the second right front fork arm 42 are all plate-shaped structures. Because the two ends of the shock absorber 5 are not installed vertically, and the first front fork arm 3 and the second front fork arm 4 are both plate-shaped structures, not only can the shock absorber 5 be fixedly installed with bolts to improve structural reliability, but also space is utilized more fully, less material is used, and production costs are effectively reduced.

[0034] In order to further improve the structural stability of the shock-absorbing front fork 100, in this embodiment, the crossbeam 1, the frame head tube 2, and the first front fork arm 3 are integrally formed structures.

[0035] The second left front fork arm 41 and the second right front fork arm 42 are each provided with a through-hole 6. The through-hole 6 is used to install a decorative cover, so that the other connecting structures of the shock-absorbing fork 100 can be covered by the decorative cover, thereby improving the aesthetic appearance.

[0036] The above-mentioned structural design of the shock-absorbing front fork 100 of this utility model cleverly utilizes the lever principle:

[0037] In the C-shaped structure design formed by the first front fork arm 3 and the second front fork arm 4, a shock absorber with a large force and short stroke (the shock absorber spring is even shorter) can be used. Under the same stroke (vertical direction from the frame head to the wheel) and the same cushioning effect, a shock absorber with a short stroke and large rebound can be used. Because the spring force is large (strong rigidity) and the stroke is short, the cost is relatively lower and the durability is higher, which can greatly reduce costs and improve durability. The two ends of the shock absorber 5 are connected to the first front fork arm 4 and the second front fork arm 5 respectively. Therefore, the actual cushioning stroke of the scooter 200 (taking the scooter as an example) is shorter than the shock absorber spring of the shock absorber 5. The internal pressure at both ends of the shock absorber 5 is on the straight line of the shock absorber spring stroke. The shock absorber fork 100 with the above structure changes the force point. Therefore, the shock absorber fork 100 is not easy to deform, and it can save the cost of the shock absorber spring of the shock absorber 5, increase its service life, and not reduce the shock absorption effect.

[0038] Compared with the prior art, the shock-absorbing fork of this utility model designs the first and second fork arms as a C-shaped structure that is hinged to each other, and then fixes the two ends of the shock absorber to the first and second fork arms respectively. The distance from the two ends of the crossbeam to the two fork slots on the corresponding sides is greater than the length of the shock absorber on the corresponding side. This structural design makes the shock absorber not nearly perpendicular to the ground but in an inclined state relative to the horizontal plane. Therefore, the cushioning stroke does not come directly from the wheel. So no matter what direction the wheel is subjected to force, such as hitting obstacles or uneven roads, it will not damage the shock absorber. The force points at both ends of the spring stroke of the shock absorber remain unchanged, which improves the durability of the shock absorber. At the same time, because the two ends of the shock absorber are installed in a non-vertical position, and the first and second fork arms are both plate structures, not only can bolt fixing be used to improve structural reliability, but also space is utilized more fully and less material is used, effectively reducing production costs.

[0039] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A shock-absorbing front fork, characterized in that, include: beam; A head tube, which extends upward from the top of the crossbeam; The first front fork arm includes a first left front fork arm and a first right front fork arm that are arranged opposite each other at intervals. The first left front fork arm and the first right front fork arm are respectively fixed to both ends of the crossbeam and extend downward at an angle from both ends of the crossbeam. The second front fork arm includes a second left front fork arm and a second right front fork arm that are arranged opposite each other. The top end of the second left front fork arm is hinged to the end of the first left front fork arm away from the crossbeam, and the top end of the second right front fork arm is hinged to the end of the first right front fork arm away from the crossbeam. The tail ends of the second left front fork arm and the tail ends of the second right front fork arm respectively form fork grooves for assembly with the wheel axle. as well as, The shock absorber comprises two shock absorbers, each of which is inclined relative to the horizontal plane. One shock absorber is fixedly connected at both ends to the first left front fork arm and the second left front fork arm, respectively, and the other shock absorber is fixedly connected at both ends to the first right front fork arm and the second right front fork arm, respectively. The distance from both ends of the crossbeam to the two fork slots on the corresponding sides is greater than the length of the shock absorber on the corresponding side.

2. The shock-absorbing fork according to claim 1, characterized in that, The shock absorber is a spring shock absorber.

3. The shock-absorbing fork according to claim 1, characterized in that, Both the second left front fork and the second right front fork are provided with through-holes for installing decorative covers.

4. The shock-absorbing fork according to claim 1, characterized in that, The crossbeam, the frame head tube, and the first front fork arm are integrally formed.

5. The shock-absorbing fork according to claim 1, characterized in that, The first left front fork arm, the first right front fork arm, the second left front fork arm, and the second right front fork arm are all plate-shaped structures.

6. The shock-absorbing fork according to claim 1, characterized in that, The shock absorber is fixed to the first front fork arm and the second front fork arm with bolts at both ends.

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