A carbon fiber bicycle frame connection structure

Abstract

The utility model discloses a carbon fiber bicycle frame connecting structure applied to the field of bicycle frame, through the setting of connecting seat, sliding seat and positioning bolt, while satisfying the adjustment demand, utilize the contact area between the expansion roof and connecting seat to enlarge to enhance the stability of both connection, and the increase of contact area can reduce the local pressure intensity, avoid the deformation of the serious local compression, still through the design fan -shaped enhancement part simultaneously, make the stress between the connecting seat and the connecting place of frame be dispersed, make sliding seat adjust to the position of leaning forward or leaning back, and connecting seat can also be well dispersed to the pressure on the frame, and will not cause the local stress increase because of adjusting the seat position, and then will lead to the deformation, damage of this connecting structure, has promoted the reliability and stability of connecting structure, can bring better use experience for the user, and also has simplified the operation of fixed alignment.

Description

Technical Field

[0001] This utility model relates to the field of bicycle frames, and in particular to a carbon fiber bicycle frame connection structure. Background Technology

[0002] Bicycle frames made of carbon fiber make bicycles lighter and stronger, adaptable to various road conditions. To improve rider comfort, carbon fiber bicycle frames and saddles are required to be adjustable so that the saddle position is adapted to the rider's height and arm length, thereby improving comfort.

[0003] Existing technology (patent document CN218877493U) discloses a self-locking carbon fiber bicycle frame, including a hollow bar and an adjustment mechanism installed next to the hollow bar. An upper bar is connected to the upper left side of the hollow bar, the other end of which is connected to a main bar. A lower bar is located at the bottom of the upper bar, the other end of which is connected to the main bar. The main bar is sleeved with an adjustment rod. The adjustment mechanism includes: a slide rail whose bottom is connected to the adjustment rod; a slider that is slidably connected to the slide rail; a screw that passes through the slider and is threadedly connected to it; and a fixing rod whose bottom is connected to the slider. The seat of this self-locking carbon fiber bicycle frame can be adjusted in both forward and backward directions, allowing the bicycle to adapt to a wider range of body shapes, increasing rider comfort, and enabling riders to ride faster, thus meeting user requirements.

[0004] Based on the above search and combined with existing technology, it was found that although the existing frame connection structure realizes the function of adjusting the seat forward and backward, it will cause the connection point between the seat and the connection structure to change during adjustment. This will cause uneven stress on the connection structure when the seat is in the forward or backward position, which will easily lead to deformation or damage of the connection structure. This is not conducive to ensuring the positional stability of the seat and will bring a bad user experience to the rider. Utility Model Content

[0005] The core of this invention lies in solving the problem in existing technologies where uneven stress on the connecting structure, leading to deformation or damage, is caused by the combined use of a connecting seat, a sliding seat, and a positioning bolt. Simultaneously, the placement of the positioning hemispherical groove, auxiliary positioning rod, and compression spring facilitates the alignment of the second positioning hole with the first positioning hole, making it easier to insert and tighten the positioning bolt, thus simplifying the fixing and alignment process.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A carbon fiber bicycle frame connection structure includes a frame and a connecting seat fixed to the frame. The connecting seat has horizontally extending grooves on both the left, right, front and rear sides. A sliding block is provided on the connecting seat. A seat mounting rod is fixed on the top of the sliding block. Sliding blocks that are adapted to slide with the grooves are integrally formed on opposite sides inside the sliding block. The slide is an n-shaped hoop, and the top of the slide is an extended top plate with a width greater than the width of the lower end of the slide. The bottom surface of the extended top plate slides against the top surface of the connecting seat. The lower end of the connector has an integrally formed fan-shaped reinforcement. The side wall of the fan-shaped reinforcement extends downward in an arc shape, and the top width of the fan-shaped reinforcement is greater than the bottom width of the fan-shaped reinforcement. The slide and the connecting seat can be fixedly connected by positioning bolts.

[0008] By setting an extended connecting seat and using it in conjunction with a slide, when the fore-and-aft position of the seat needs to be adjusted, simply slide the slide to move the seat mounting rod and the seat mounted on it back and forth. Then, it can be fixed with positioning bolts. While meeting adjustment needs, the extended top plate increases the contact area between the slide and the connecting seat, thereby enhancing the stability of the connection between the two. At the same time, increasing the contact area can reduce local pressure and avoid deformation caused by severe local pressure. In addition, the design of the fan-shaped reinforcement part can disperse the stress between the connecting seat and the frame. When the slide is adjusted to a more forward or rearward position, the connecting seat can also effectively distribute the pressure on the frame, without increasing local stress due to seat position adjustment, which could lead to deformation or damage to the connection structure. This improves the reliability and stability of the connection structure and provides users with a better user experience.

[0009] Furthermore, the connecting seat is provided with a first positioning hole that is horizontally penetrating the connecting seat. Multiple first positioning holes are provided and are equidistantly distributed along the extension direction of the slide groove. The slide has a second positioning hole that runs horizontally through it. The second positioning hole corresponds to the position of the first positioning hole. The positioning bolt passes through the first positioning hole and the second positioning hole and is screwed and fixed with a nut.

[0010] Furthermore, a nut groove communicating with the second positioning hole is provided on one side of the slide. The nut groove is located on the back side of the slide away from the connecting seat. A nut that is screwed into the nut groove is adapted to the positioning bolt. The nut part of the positioning bolt is set as a knob.

[0011] Furthermore, limit blocks are fixed at both ends of the connecting seat. The cross-section of the limit blocks is larger than that of the connecting seat, and the limit blocks close the end of the sliding groove.

[0012] Preferably, the front and rear side walls of the connecting seat are provided with positioning hemispherical grooves. Multiple positioning hemispherical grooves are provided and correspond to the positions of multiple first positioning holes respectively. The multiple positioning hemispherical grooves are also equidistantly distributed along the extension direction of the slide groove. Auxiliary positioning rods are installed on the inner walls of opposite sides of the slide. The auxiliary positioning rods are elastically embedded in the slide, and the front end of the auxiliary positioning rods forms a hemispherical head, which is movably embedded in the positioning hemispherical groove.

[0013] Furthermore, an installation groove is provided on the inner side of the slide block. The inner diameter of the opening of the installation groove is smaller than the inner diameter of the installation groove. The auxiliary positioning rod is slidably embedded in the opening of the installation groove, and a limiting plate with the same inner diameter as the installation groove is fixed at one end of the auxiliary positioning rod inside the installation groove. The limiting plate at the end of the auxiliary positioning rod is fixed to the inner wall of the installation groove by a compression spring.

[0014] Compared with existing technologies, the advantages of this utility model are: (1) With the setting of connecting seat, slide and positioning bolt, when the rider needs to adjust the front and back position of the seat, he only needs to unscrew the positioning bolt to release the fixed relationship between the slide and the connecting seat. Then slide the slide to drive the seat mounting rod and the seat mounted on it to slide back and forth. After the adjustment is completed, it can be fixed again with positioning bolt. While meeting the adjustment needs, the extension top plate is used to increase the contact area between the slide and the connecting seat, thereby enhancing the stability of the connection between the two. At the same time, increasing the contact area can reduce local pressure and avoid local pressure to cause deformation. In addition, by designing the fan-shaped reinforcement, the stress between the connecting seat and the frame is dispersed. When the slide is adjusted to a forward or backward position, the connecting seat can also distribute the pressure to the frame well, so that the local stress will not increase due to the adjustment of the seat position, which will lead to deformation and damage of the connection structure. This improves the reliability and stability of the connection structure and can bring a better user experience.

[0015] (2) This solution uses a positioning hemispherical groove, an auxiliary positioning rod, and a compression spring. When the user pushes the slide, the slide moves the auxiliary positioning rod and the compression spring synchronously, which causes the spherical surface of the hemispherical head to be squeezed against the groove surface of the positioning hemispherical groove. The auxiliary positioning rod is squeezed and overcomes the elastic force of the compression spring to retract into the mounting groove, thus allowing the slide to move smoothly. When the auxiliary positioning rod moves to the position corresponding to another positioning hemispherical groove, the auxiliary positioning rod is ejected under the elastic force of the compression spring and the hemispherical head extends into the positioning hemispherical groove. The friction between the hemispherical head and the positioning hemispherical groove is used to achieve the pre-limiting of the slide, so that the second positioning hole can correspond to the position of the first positioning hole, which is convenient for inserting the positioning bolt and for fixing the slide after adjusting the position of the slide, making it more convenient to use. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a front view of the connecting seat, sliding seat, seat mounting rod, and positioning bolt of this utility model; Figure 3 This is a schematic diagram of the slide structure of this utility model; Figure 4 This is a schematic diagram of the auxiliary positioning rod and compression spring structure in the side section of the slide block of this utility model.

[0017] Explanation of the labels in the diagram: 1. Frame; 2. Connecting seat; 21. Fan-shaped reinforcement; 22. Limiting block; 23. Slide groove; 24. First positioning hole; 25. Positioning hemispherical groove; 3. Slide seat; 31. Extended top plate; 32. Slider; 33. Second positioning hole; 34. Nut groove; 35. Mounting groove; 4. Seat mounting rod; 5. Positioning bolt; 6. Auxiliary positioning rod; 61. Hemispherical head; 7. Compression spring. Detailed Implementation

[0018] The technical solution will now be clearly and completely described with reference to the accompanying drawings in the embodiments of this utility model.

[0019] First implementation method: Please see Figures 1-3 A carbon fiber bicycle frame connection structure includes a frame 1 and a connecting seat 2 fixed to the frame 1. The connecting seat 2 has horizontally extending grooves 23 on both the left, right, front and rear sides. A sliding block 3 is provided on the connecting seat 2. A seat mounting rod 4 is fixed on the top of the sliding block 3. Sliding blocks 32 that slide and adapt to the grooves 23 are integrally formed on opposite sides inside the sliding block 3. The seat mounting rod 4 adopts a telescopic rod structure consistent with the prior art. It can be locked by a locking structure. The operation steps for adjusting the height of the seat are well known to those in the art and will not be described in detail here. The slide block 3 is an n-shaped hoop. The top of the slide block 3 is an extended top plate 31 with a width greater than the width of the lower end of the slide block 3. The bottom surface of the extended top plate 31 slides against the top surface of the connecting seat 2. The lower end of the connecting seat 2 is integrally formed with a fan-shaped reinforcing part 21. The side wall of the fan-shaped reinforcing part 21 extends downward in an arc shape, and the top width of the fan-shaped reinforcing part 21 is greater than the bottom width of the fan-shaped reinforcing part 21. The slide 3 and the connecting seat 2 can be fixedly connected by positioning bolts 5.

[0020] Based on the above structure, when the rider needs to adjust the fore-and-aft position of the seat, simply unscrew the positioning bolt 5 to release the fixed relationship between the slide 3 and the connecting seat 2. Then, slide the slide 3 to drive the seat mounting rod 4 and the seat mounted on it to slide back and forth. After adjustment, fix it again with the positioning bolt 5. While meeting the adjustment needs, the extension top plate 31 is used to increase the contact area between the slide 3 and the connecting seat 2, thereby enhancing the stability of the connection between the two. At the same time, increasing the contact area can reduce local pressure and avoid deformation caused by severe local pressure. In addition, the design of the fan-shaped reinforcement part 21 can disperse the stress between the connecting seat 2 and the frame 1. When the slide 3 is adjusted to a forward or backward position, the connecting seat 2 can also effectively distribute the pressure on the frame 1, without increasing local stress due to adjusting the seat position, which would lead to deformation or damage of the connection structure. This improves the reliability and stability of the connection structure and can bring a better user experience.

[0021] Furthermore, the connecting seat 2 is provided with a first positioning hole 24 that is horizontally penetrating the connecting seat 2. Multiple first positioning holes 24 are provided and are equidistantly distributed along the extension direction of the slide groove 23. The slide block 3 has a second positioning hole 33 that is horizontally penetrating the slide block 3. The second positioning hole 33 corresponds to the position of the first positioning hole 24. The positioning bolt 5 passes through the first positioning hole 24 and the second positioning hole 33 and is screwed and fixed with a nut.

[0022] Furthermore, a nut groove 34 communicating with the second positioning hole 33 is provided on one side of the slide 3. The nut groove 34 is located on the back side of the slide 3 away from the connecting seat 2. A nut that is screwed into the nut groove 34 is adapted to the positioning bolt 5. The nut part of the positioning bolt 5 is set as a knob, which makes it easy for the rider to tighten or loosen the positioning bolt 5 without using other tools. The operation is convenient and more suitable for the actual application needs of bicycles.

[0023] Furthermore, limit blocks 22 are fixed at both ends of the connecting seat 2. The cross section of the limit block 22 is larger than that of the connecting seat 2, and the limit block 22 closes the end of the sliding groove 23. Setting the limit block 22 can not only enhance the structural stability of the connection between the connecting seat 2 and the frame 1, but also prevent the sliding seat 3 from detaching from the connecting seat 2 when sliding back and forth. The structural design is more reasonable and more stable and reliable in use.

[0024] Second implementation method: Please see Figures 2-4 A carbon fiber bicycle frame connection structure, which differs from the first embodiment in that: The front and rear side walls of the connecting seat 2 are provided with positioning hemispherical grooves 25. Multiple positioning hemispherical grooves 25 are provided and correspond to the positions of multiple first positioning holes 24 respectively. The multiple positioning hemispherical grooves 25 are also equidistantly distributed along the extension direction of the slide groove 23. Auxiliary positioning rods 6 are installed on the inner walls of opposite sides of the slide block 3. The auxiliary positioning rods 6 are elastically embedded in the slide block 3. The front end of the auxiliary positioning rod 6 forms a hemispherical head 61, which is movably embedded in the positioning hemispherical groove 25. Specifically, the slide block 3 has an installation groove 35 on its inner side. The inner diameter of the opening of the installation groove 35 is smaller than the inner diameter of the installation groove 35. The auxiliary positioning rod 6 is slidably embedded in the opening of the installation groove 35. The end of the auxiliary positioning rod 6 located inside the installation groove 35 is fixed with a limiting plate with the same inner diameter as the installation groove 35. The limiting plate at the end of the auxiliary positioning rod 6 is fixed to the inner wall of the installation groove 35 by a compression spring 7.

[0025] With the arrangement of the positioning hemispherical groove 25, the auxiliary positioning rod 6, and the compression spring 7, when the user pushes the slide block 3, the slide block 3 drives the auxiliary positioning rod 6 and the compression spring 7 to move synchronously. This causes the spherical surface of the hemispherical head 61 to press against the inner groove surface of the positioning hemispherical groove 25. The auxiliary positioning rod 6, under pressure, overcomes the elastic force of the compression spring 7 and retracts into the mounting groove 35, thus allowing the slide block 3 to move smoothly. When the auxiliary positioning rod 6 moves to a position corresponding to another positioning hemispherical groove 25, the auxiliary positioning rod 6, i.e., the elastic force of the compression spring 7, pops out and causes the hemispherical head 61 to extend into the positioning hemispherical groove 25. The friction between the hemispherical head 61 and the positioning hemispherical groove 25 achieves the pre-limiting of the slide block 3, so that the second positioning hole 33 can correspond to the position of the first positioning hole 24, which is convenient for inserting the positioning bolt 5 and for fixing the slide block 3 after adjusting its position, making it more convenient to use.

[0026] The above description is merely a preferred embodiment of this utility model; it encompasses all the protection scope of this utility model. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be covered within the protection scope of this utility model.

Claims

1. A carbon fiber bicycle frame connection structure, comprising a frame (1) and a connecting seat (2) fixed to the frame (1), characterized in that: The connecting seat (2) has horizontally extending sliding grooves (23) on both the left, right, front and back sides. The connecting seat (2) has a sliding hoop with a sliding seat (3). The top of the sliding seat (3) is fixed with a car seat mounting rod (4). The sliding seat (3) has a slider (32) integrally formed on both opposite sides inside the sliding seat (3) to slide and adapt to the sliding groove (23). The slide (3) is an n-shaped hoop, and the top of the slide (3) is an extended top plate (31) with a width greater than the width of the lower end of the slide (3). The bottom surface of the extended top plate (31) slides against the top surface of the connecting seat (2). The lower end of the connecting seat (2) is integrally formed with a fan-shaped reinforcing part (21). The side wall of the fan-shaped reinforcing part (21) extends downward in an arc shape. The top width of the fan-shaped reinforcing part (21) is greater than the bottom width of the fan-shaped reinforcing part (21). The slide (3) and the connecting seat (2) can be fixedly connected by positioning bolts (5).

2. The carbon fiber bicycle frame connection structure according to claim 1, characterized in that: The connecting seat (2) is provided with a first positioning hole (24) that is horizontally penetrating the connecting seat (2). Multiple first positioning holes (24) are provided, and the multiple first positioning holes (24) are equidistantly distributed along the extension direction of the slide groove (23). The slide (3) has a second positioning hole (33) that is horizontally penetrating the slide (3). The second positioning hole (33) corresponds to the position of the first positioning hole (24). The positioning bolt (5) passes through the first positioning hole (24) and the second positioning hole (33) and is screwed and fixed with the nut.

3. The carbon fiber bicycle frame connection structure according to claim 2, characterized in that: The slide (3) has a nut groove (34) on one side that communicates with the second positioning hole (33). The nut groove (34) is located on the back side of the slide (3) away from the connecting seat (2). The nut groove (34) is fitted with a nut that is screwed into the positioning bolt (5). The nut part of the positioning bolt (5) is set as a knob.

4. The carbon fiber bicycle frame connection structure according to claim 3, characterized in that: Both ends of the connecting seat (2) are fixed with limit blocks (22). The cross section of the limit block (22) is larger than the cross section of the connecting seat (2), and the limit block (22) closes the end of the sliding groove (23).

5. The carbon fiber bicycle frame connection structure according to claim 1, characterized in that: The connecting seat (2) has positioning hemispherical grooves (25) on both the front and rear side walls. Multiple positioning hemispherical grooves (25) are provided and correspond to the positions of multiple first positioning holes (24). The multiple positioning hemispherical grooves (25) are also equidistantly distributed along the extension direction of the slide groove (23). Auxiliary positioning rods (6) are installed on the inner walls of opposite sides of the slide (3). The auxiliary positioning rods (6) are elastically embedded in the slide (3). A hemispherical head (61) is formed at the front end of the auxiliary positioning rod (6). The hemispherical head (61) is movably embedded in the positioning hemispherical groove (25).

6. The carbon fiber bicycle frame connection structure according to claim 5, characterized in that: The slide (3) has an installation groove (35) on its inner side. The inner diameter of the opening of the installation groove (35) is smaller than the inner diameter of the installation groove (35). The auxiliary positioning rod (6) is slidably embedded in the opening of the installation groove (35). One end of the auxiliary positioning rod (6) located inside the installation groove (35) is fixed with a limiting plate with the same inner diameter as the installation groove (35). The limiting plate at the end of the auxiliary positioning rod (6) is fixed to the inner wall of the installation groove (35) by a compression spring (7).

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