Folding frame
Patent Information
- Application Number
- CN202522244028.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-22
- Publication Date
- 2026-09-22
- Estimated Expiration
- 2035-10-22
AI Technical Summary
然而，对于一些底架为一体式的折叠车架来说，如果背靠朝向座体收折，而座体靠拢到底架后，会造成车底架前段较薄，后段较厚，或者前段较厚，后段较薄，车架折叠后整体分布不均匀，导致占用的空间较大，且外形不够美观
[0005]与现有技术相比，本实用新型通过设置第一支撑杆及第二支撑杆，并将第一支撑杆的两端分别与所述车底架及座体枢接，将第二支撑杆的两分别与所述车底架及座体枢接，从而使得所述车底架、第一支撑杆、第二支撑杆及座体之间形成一个可变形的四边形，进而使得所述座体可朝向所述车底架的前段靠拢。另外，又通过将所述第二支撑杆的上端与所述背靠枢接，而所述背靠的下端通过轴销与所述座体的滑动槽滑动配合，进而使所述座体、背靠及第二支撑杆之间形成一个可变形的三角形，从而可以在所述第二支撑杆收折的同时带动所述背靠朝向所述座体的后方联动收折并向车底架靠拢，因此，在车架完全收后，所述座体位于所述车底架的前段表而，而所述背靠位于所述车底架的后段表面，使得收折后的车架外形扁平且各件分布均匀，占用空间十分小，而整个收折机构只需要使用第一支撑杆及第二支撑杆即可，使用杆件的数量极小，结构十分简单。
Smart Images
Figure CN224782217U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a mobility scooter, and more particularly to a folding frame for a mobility scooter. Background Technology
[0002] Existing folding frames typically fold down the seat and backrest simultaneously to reduce the folded size. For folding frames with a two-section frame (front and rear), the backrest rotates forward towards the seat, while the seat itself moves towards the rear frame. Finally, the front frame may also move towards the rear frame, resulting in a box-like shape when folded. However, for some folding frames with a one-piece frame, if the backrest folds towards the seat and the seat moves towards the frame, the front section of the frame becomes thinner than the rear, or vice versa. This uneven distribution of weight after folding results in a larger footprint and a less aesthetically pleasing appearance. Utility Model Content
[0003] The purpose of this invention is to provide a folding frame that features back-to-back linkage folding, a simple structure, a uniformly distributed shape after folding, and a small footprint.
[0004] To achieve the above objectives, the folding frame provided by this utility model includes a chassis, a first support rod, a second support rod, a seat, and a backrest. The lower end of the first support rod is pivotally connected to the chassis via a first pivot shaft, and the upper end of the first support rod is pivotally connected to the seat via a second pivot shaft. The lower end of the second support rod is pivotally connected to the rear end of the chassis via a third pivot shaft. The second support rod is pivotally connected to the rear end of the seat via a fourth pivot shaft. The upper end of the second support rod is pivotally connected to the backrest via a fifth pivot shaft, and the fourth pivot shaft is located between the third and fifth pivot shafts. A sliding groove is provided on the outer side of the seat along the front-rear direction of the seat, and a pin is provided at the lower end of the backrest, the pin being slidably disposed in the sliding groove.
[0005] Compared with the prior art, the present invention sets up a first support rod and a second support rod, and pivotally connects the two ends of the first support rod to the vehicle chassis and the seat body respectively, and pivotally connects the two ends of the second support rod to the vehicle chassis and the seat body respectively, so that the vehicle chassis, the first support rod, the second support rod and the seat body form a deformable quadrilateral, thereby allowing the seat body to move toward the front of the vehicle chassis. Furthermore, by pivoting the upper end of the second support rod to the backrest, and sliding the lower end of the backrest with the sliding groove of the seat body via a pin, a deformable triangle is formed between the seat body, the backrest, and the second support rod. This allows the backrest to fold backward toward the rear of the seat body and move toward the chassis frame while the second support rod is folded. Therefore, when the chassis is fully folded, the seat body is located on the front surface of the chassis frame, and the backrest is located on the rear surface of the chassis frame. This results in a flat and evenly distributed chassis shape after folding, occupying very little space. The entire folding mechanism only requires the first and second support rods, resulting in a very small number of rods and a very simple structure.
[0006] Preferably, the sliding groove is located between the second pivot shaft and the fourth pivot shaft. This allows the lower end of the backrest to flip towards the rear of the seat body under the tension of the second support rod, ensuring a more even distribution of the rods after the seat body and backrest move towards the chassis frame, thereby reducing the space occupied by the chassis.
[0007] Preferably, the first support rod is located on the outside of the vehicle chassis and the seat, and the lower end of the second support rod is located above the upper surface of the vehicle chassis; the upper end of the second support rod is located on the outer rear end of the seat. This allows the first support rod to be located on the outside of the vehicle chassis when folded, while the second support rod is located on the upper surface of the vehicle chassis when folded, thereby enabling the seat, the first support rod, and the second support rod to fit completely against the vehicle chassis, resulting in a more compact and rational vehicle frame structure when folded.
[0008] Preferably, a first pivot seat is provided extending downward from the outer side of the middle portion of the seat body, and the upper end of the first support rod is pivotally connected to the first pivot seat. This ensures that the upper end of the first support rod is located below the seat body and outside the vehicle chassis when folded, making the structure more compact.
[0009] Preferably, a second pivot seat is provided on the rear end surface of the vehicle chassis extending upward, and the lower end of the second support rod is pivotally connected to the second pivot seat. This ensures that the second support rod is close to the surface of the vehicle chassis when folded, thereby offsetting its arrangement from the first support rod and making the structure more compact.
[0010] Preferably, a third pivot seat is provided on the rear side of the backrest, the upper end of the second support rod is pivotally connected to one end of the third pivot seat, and the axle pin is provided at the other end of the third pivot seat. This allows the second support rod to drive the backrest to flip towards the rear of the seat body, and after folding, the backrest is close to the top of the second support rod, thereby making the structure more compact.
[0011] Preferably, the folding frame further includes a locking device disposed between the seat and the backrest to lock the support frame composed of the first support rod, the second support rod, the seat, and the backrest. The locking device ensures stability in the unfolded state of the frame, providing support for passengers and guaranteeing driving safety.
[0012] Preferably, the folding frame further includes a slider connected to the pivot pin, and the slider is slidably disposed on the seat. The slider design allows for more stable sliding while the back is resting on the seat, thus enhancing safety.
[0013] Specifically, the folding frame also includes a locking device, which comprises a mounting base and a locking pin. The slider has a locking hole, the mounting base is disposed on the seat body, and the locking pin is slidably disposed within the mounting base and inserts into the locking hole when the backrest is opened relative to the seat body to lock the slider. This locking device locks the position of the slider, thereby maintaining stability in the unfolded state of the frame, providing support for riding, and ensuring driving safety.
[0014] Specifically, the locking device further includes an elastic element disposed between the locking pin and the mounting base to provide an elastic force for inserting the locking pin into the locking hole. Attached Figure Description Figure 1 This is a three-dimensional view of the folding frame of this utility model when unfolded.
[0015] Figure 2 This is a side view of the folding frame of this utility model.
[0016] Figure 3 This is an exploded view of the folding bicycle frame of this utility model.
[0017] Figure 4 This is a rear-view perspective view of the folding frame of this utility model.
[0018] Figure 5 Figure 4 Enlarged view of section F in the middle.
[0019] Figure 6 This is an exploded view of the locking device of the folding frame of this utility model.
[0020] Figure 7 This is an axial sectional view of the locking device of the folding frame of this utility model.
[0021] Figure 8 This is a diagram showing the motion state of each component of the folding frame of this utility model when it is folded up.
[0022] Figure 9 This is a diagram showing the folding frame of this utility model after it has been folded up. Detailed Implementation
[0023] To explain in detail the technical content, structural features, objectives and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.
[0024] Please see Figures 1 to 4 The folding bicycle frame 100 of this utility model includes a chassis 1, a first support rod 2, a second support rod 3, a seat 4, and a backrest 5. The chassis 1 has a front wheel 11 at its front end and a rear wheel 12 at its rear end. The first support rod 2 and the second support rod 3 form a group, each group being symmetrically arranged on the left and right sides of the chassis 1. Taking one side as an example, the lower end of the first support rod 2 is pivotally connected to the chassis 1 via a first pivot shaft A, and the upper end of the first support rod 2 is pivotally connected to the seat 4 via a second pivot shaft B, with the pivot point located in the middle of the seat 4. The lower end of the second support rod 3 is pivotally connected to the rear end of the chassis 1 via a third pivot shaft C; the second support rod 3 is pivotally connected to the rear end of the seat 4 via a fourth pivot shaft D. The second support rod 3 and the first support rod 2 are approximately parallel. The upper end of the second support rod 3 is pivotally connected to the backrest 5 near its end face via a fifth pivot shaft E. The fourth pivot shaft D is located between the third pivot shaft C and the fifth pivot shaft E, specifically, the fourth pivot shaft D is located between the midpoint of the second support rod 3 and the fifth pivot shaft E. The first pivot shaft A, the second pivot shaft B, the third pivot shaft C, the fourth pivot shaft D, and the fifth pivot shaft E are all parallel to the rotation center axis of the rear wheel 12. A sliding groove 41 is provided on the outer side of the seat body 4 along the front and rear directions of the seat body 4. A pin is provided at the lower end of the backrest 5, and the pin is slidably disposed in the sliding groove 41. The sliding groove 41 is located between the second pivot shaft B and the fourth pivot shaft D. This allows the lower end of the backrest 5 to flip towards the rear of the seat body 4 under the pulling force of the second support rod 3, ensuring that the distribution of each rod is more even after the seat body 4 and the backrest 5 move closer to the chassis 1, thereby reducing the space occupied by the chassis.
[0025] Please see again Figures 1 to 4The first support rod 2 is located on the outside of the chassis 1 and the seat 4; specifically, the lower end of the first support rod 2 is located on the outside of the chassis 1, and the upper end of the first support rod 2 is located on the outside of the seat 4. The second support rod 3 has a bent structure, with the lower end of the second support rod 3 located above the upper surface of the chassis 1, and the upper end of the second support rod 3 located on the outer rear end of the seat 4. More specifically, the first pivot shaft A is located on the outside of the chassis 1, the second pivot shaft B is located on the outside of the seat 4, the third pivot shaft C is located above the upper surface of the chassis 1; the fourth pivot shaft D is located on the outer rear end of the seat 4; and the fifth pivot shaft E is located on the rear side of the backrest 5. This arrangement allows the first support rod 2 to be located on the outside of the chassis 1 after folding, while the second support rod 3 is located on the surface above the chassis 1 after folding. This ensures that the seat 4, the first support rod 2, and the second support rod 3 can completely fit against the chassis 1, resulting in a more compact and rational chassis structure after folding. More specifically, a first pivot seat 42 extends downward from the outer middle of the seat 4, and the upper end of the first support rod 2 is pivotally connected to the first pivot seat 42. This ensures that the upper end of the first support rod 2 is located below the seat 4 and on the outside of the chassis 1 after folding, making the structure more compact. A second pivot seat 13 extends upward from the rear end surface of the chassis 1, and the lower end of the second support rod 3 is pivotally connected to the second pivot seat 13. This ensures that the second support rod 3 is close to the surface of the chassis 1 after folding, thus offset from the first support rod 2, making the structure more compact. In addition, the width of the seat 4 is equal to the width of the chassis 1.
[0026] Please see again Figure 4 Additionally, a third pivot seat 52 extends rearward from the rear side of the backrest 5. The upper end of the second support rod 3 is pivotally connected to one end of the third pivot seat 52, and the pin 51 is located at the other end of the third pivot seat 52. This allows the second support rod 3 to drive the backrest 5 to flip towards the rear of the seat body 4, and after folding, the backrest 5 is close to the top of the second support rod 3, thus making the structure more compact.
[0027] Please see Figure 3 and Figure 7 The folding frame 100 also includes a slider 6, which is connected to the pivot pin 51 and is slidably disposed on the seat 4. Specifically, the seat 4 has a slide rail 43, and the slider 6 is slidably disposed within the slide rail 43. By being disposed on the slider 6, the backrest 5 can slide more stably on the seat 4, thus improving safety.
[0028] Please see Figures 5 to 7The folding frame 100 also includes a locking device 7, which includes a mounting base 71, a locking pin 72, and an elastic element 73. The slider 6 has a locking hole 61. The mounting base 71 is disposed on the seat body 4. The locking pin 72 is slidably disposed within the mounting base 71 and is inserted into the locking hole 61 when the backrest 5 is opened relative to the seat body 4 to lock the slider 6, thereby locking the frame. The elastic element 73 is disposed between the locking pin 72 and the mounting base 71 to provide an elastic force for the locking pin 72 to insert into the locking hole 61. The elastic element 73 is a compression spring. By providing the locking device 7, the position of the slider 6 can be locked, thereby keeping the frame stable in its unfolded state, providing support for riding, and ensuring driving safety.
[0029] In summary and in combination Figure 8 and Figure 9 The working principle of the folding bicycle frame 100 of this utility model will be described in detail below: When the folding frame 100 needs to be folded, pull one end of the locking pin 72, causing the locking pin 72 to overcome the elastic force of the elastic element 73 and exit the locking hole 61. At this time, the folding frame 100 is in the unlocked state. By driving any one or at least one of the first support rod 2, the second support rod 3, the seat 4, and the backrest 5 to swing, the other components can be driven to operate simultaneously. Therefore, the first support rod 2 rotates around the first pivot axis A towards the front of the chassis 1 and then moves closer to the chassis 1 to fold, and the second support rod 3 rotates around the third pivot axis C towards the front of the chassis 1 and then moves closer to the chassis 1 to fold. Simultaneously, the seat 4 moves towards the front half of the chassis 1. Under the force of the upper end of the second support rod 3 and the seat 4, the lower end of the backrest 5 slides from the rear end of the sliding groove 41 towards the front end. The backrest 5 as a whole rotates around the axle pin 51 towards the rear side of the seat 4 and moves towards the rear half of the chassis 1. Finally, the first support rod 2 is located on the outside of the chassis 1, and the seat 4, the second support rod 3, and the backrest 5 are located on the upper side of the chassis 1, with each component close together. In addition, the front end of the folding frame 100 is also provided with a foldable direction rod, which rotates towards the chassis 1 and folds. In this way, the folding frame 100 can be completely folded into a flat state, and the folded shape is relatively uniform and aesthetically pleasing.
[0030] Compared with the prior art, the present invention sets up a first support rod 2 and a second support rod 3, and pivotally connects the two ends of the first support rod 2 to the vehicle chassis 1 and the seat 4 respectively, and pivotally connects the two ends of the second support rod 3 to the vehicle chassis 1 and the seat 4 respectively, so that the vehicle chassis 1, the first support rod 2, the second support rod 3 and the seat 4 form a deformable quadrilateral, thereby allowing the seat 4 to move toward the front of the vehicle chassis 1. Furthermore, by pivoting the upper end of the second support rod 3 to the backrest 5, and sliding the lower end of the backrest 5 to the sliding groove 41 of the seat 4 via the pin 51, a deformable triangle is formed between the seat 4, the backrest 5, and the second support rod 3. This allows the backrest 5 to fold backward toward the rear of the seat 4 and move closer to the chassis 1 while the second support rod 3 is folded. Therefore, after the chassis is fully folded, the seat 4 is located on the front surface of the chassis 1, and the backrest 5 is located on the rear surface of the chassis 1. This results in a flat and evenly distributed chassis after folding, occupying very little space. The entire folding mechanism only requires the first support rod 2 and the second support rod 3, resulting in a very simple structure with a minimal number of rods.
[0031] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the scope of the present utility model shall still fall within the scope of the present utility model.
Claims
1. A folding bicycle frame, characterized in that: The system includes a chassis, a first support rod, a second support rod, a seat, and a backrest. The lower end of the first support rod is pivotally connected to the chassis via a first pivot shaft, and the upper end of the first support rod is pivotally connected to the seat via a second pivot shaft. The lower end of the second support rod is pivotally connected to the rear end of the chassis via a third pivot shaft. The second support rod is pivotally connected to the rear end of the seat via a fourth pivot shaft. The upper end of the second support rod is pivotally connected to the backrest via a fifth pivot shaft, with the fourth pivot shaft located between the third and fifth pivot shafts. The outer side of the seat has a sliding groove along its front-rear direction, and the lower end of the backrest has a pivot pin that is slidably disposed in the sliding groove.
2. The folding frame according to claim 1, characterized in that: The sliding groove is located between the second pivot shaft and the fourth pivot shaft.
3. The folding frame according to claim 1, characterized in that: The first support rod is located on the outside of the vehicle chassis and the seat, the lower end of the second support rod is located above the upper surface of the vehicle chassis, and the upper end of the second support rod is located on the outside of the rear end of the seat.
4. The folding frame according to claim 1, characterized in that: A first pivot seat is provided on the outer side of the middle part of the seat, and the upper end of the first support rod is pivotally connected to the first pivot seat.
5. The folding frame according to claim 1, characterized in that: The rear end surface of the vehicle chassis is provided with a second pivot seat extending upward, and the lower end of the second support rod is pivotally connected to the second pivot seat.
6. The folding frame according to claim 1, characterized in that: The backrest extends rearward to provide a third pivot seat, the upper end of the second support rod is pivotally connected to one end of the third pivot seat, and the axle pin is provided at the other end of the third pivot seat.
7. The folding frame according to any one of claims 1 to 6, characterized in that: The folding frame also includes a locking device disposed between the seat and the backrest to lock the bracket composed of the first support rod, the second support rod, the seat and the backrest.
8. The folding frame according to claim 1, characterized in that: The folding frame also includes a slider, which is connected to the pivot pin and is slidably disposed on the base.
9. The folding frame according to claim 8, characterized in that: The folding frame also includes a locking device, which includes a mounting base and a locking pin. The slider has a locking hole, the mounting base is disposed on the seat body, and the locking pin is slidably disposed in the mounting base and is inserted into the locking hole when the backrest is opened relative to the seat body to lock the slider.
10. The folding frame according to claim 9, characterized in that: The locking device further includes an elastic element disposed between the locking pin and the mounting base to provide an elastic force for inserting the locking pin into the locking hole.