A scooter folding frame
By using limit blocks and locking components to stagger the front and rear folding rods, the deformation problem caused by the gap between the front and rear folding rods is solved, which improves the service life of the vehicle, reduces maintenance costs, and reduces the space occupied.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN SMARFODY MOBILITY TECHNOLOGY CO LTD
- Filing Date
- 2025-07-03
- Publication Date
- 2026-06-23
AI Technical Summary
During the folding process, the gap between the front and rear folding rods of existing mobility scooters causes localized high pressure, which can easily lead to deformation, affecting the service life. Furthermore, replacement is complicated and costly.
Design a folding frame for a personal mobility vehicle. The front and rear folding rods are staggered vertically and horizontally using limit blocks and locking components. The limit plate increases the stress area, and the limit blocks can be replaced individually to reduce maintenance costs.
It increases the lifespan of the mobility scooter, reduces maintenance costs, and minimizes the space it occupies when folded.
Smart Images
Figure CN224392858U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mobility scooter structures, and in particular to a folding frame for a mobility scooter. Background Technology
[0002] Existing personal mobility vehicles are generally designed as foldable models for easy storage and transportation. The folding of the entire vehicle is primarily driven by the folding action of the bottom frame. In use, the rear folding bar in the bottom frame is located below the front folding bar, with its front end hinged to the middle of the front folding bar. During riding, the pressure from the seat structure and the user's weight causes the rear end of the front folding bar to press firmly against the front end. Because the very front end of the rear folding bar needs to allow for some rotation, there is a gap between it and the front folding bar. This means that the front and rear folding bars are not actually perfectly parallel, resulting in the rear end of the front folding bar pressing firmly against the middle of the rear folding bar. This localized pressure can easily lead to deformation of both the front and rear folding bars, negatively impacting the lifespan of the personal mobility vehicle. Furthermore, replacing the front and rear folding bars is complex and expensive, resulting in high maintenance costs. Therefore, it is necessary to develop a folding frame for personal mobility vehicles to address these issues. Utility Model Content
[0003] The purpose of this invention is to provide a folding frame for a personal mobility vehicle to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, this utility model provides the following technical solution:
[0005] A folding frame for a personal mobility vehicle includes a front crossbeam, a mounting crossbeam, a front folding rod, a rear folding rod, a first hinge plate, a second hinge plate, a limiting block, and a locking assembly. The first hinge plate is fixed to the front crossbeam. The front end of the front folding rod is rotatably mounted on the first hinge plate. Two sets of the first hinge plate and the front folding rod are provided, corresponding to the left and right sides of the front crossbeam. Two sets of the rear folding rod are provided and fixed to the left and right sides of the mounting crossbeam, respectively. The two sets of rear folding rods correspond to the upper inner sides of the two sets of front folding rods. The upper end of the second hinge plate is fixed to the front end of the rear folding rod. The rear side of the front folding rod is rotatably mounted on the lower end of the second hinge plate. The limiting block corresponds to the rear side of the second hinge plate and its lower end is fixed to the front folding rod. The upper end of the limiting block has a laterally protruding limiting plate, and the lower end face of the limiting plate contacts the upper end face of the rear folding rod. The front and rear ends of the locking assembly are respectively mounted on the front crossbeam and the mounting crossbeam for fixing the front crossbeam and the mounting crossbeam.
[0006] Further description of this utility model: The lower end surface of the limiting plate is a downwardly protruding arc-shaped surface, and the contact surface between the rear folding rod and the limiting plate is a downwardly concave arc-shaped surface.
[0007] Further description of this utility model: The locking assembly includes a third hinge plate, a fourth hinge plate, a rocker arm, a folding lock pin, an unfolding lock pin, a locking plate, a connecting pin, a spring, and a drive handle. The lower end of the third hinge plate is fixed to the front crossbeam, and the rear end of the fourth hinge plate is fixed to the mounting crossbeam. The front and rear sides of the fourth hinge plate are respectively provided with a first hinge portion and a second hinge portion. The front and rear ends of the rocker arm are rotatably mounted on the upper end of the third hinge plate and the first hinge portion, respectively. The folding lock pin and the unfolding lock pin are both fixed to the rear end of the rocker arm and correspond to the front and rear sides of the first hinge portion, respectively. The locking plate includes an integrally formed unfolding lock rod, a folding lock rod, and a handle connecting plate. The rear end of the rod is rotatably mounted on the second hinge. The front end of the unfolding locking rod is provided with a first latch groove, which is used to engage with the unfolding locking pin in the unfolded state. The connecting pin is fixed on the fourth hinge plate and corresponds to the lower part of the second hinge. The folding locking rod is located between the unfolding locking pin and the connecting pin and its upper end is connected to the unfolding locking rod. The lower rear side of the folding locking rod is provided with a guide slope. The folding locking rod is provided with a second latch groove and a connecting hook corresponding to the upper part of the guide slope in sequence. The second latch groove is used to engage with the folding locking pin in the folded state. The two ends of the spring are fixed on the connecting pin and the connecting hook, respectively. The handle connecting plate is connected to the upper end of the unfolding locking rod, and the drive handle is fixed on the handle connecting plate.
[0008] Further description of the present invention: The drive handle includes a first pull rod and a second pull rod. The first pull rod is horizontally arranged and its rear end is fixed to the handle connecting plate. The second pull rod is vertically arranged and its lower end is fixed to the handle connecting plate.
[0009] The beneficial effects of this utility model are as follows: The front of the vehicle, the front wheel and other components are installed on the crossbeam of the front of the vehicle, the rear wheel assembly is installed at the rear end of the rear folding rod, and the seat assembly is installed on the front folding rod and the rear folding rod. During the unfolding process, the unfolding of the folding frame drives the overall unfolding of the vehicle. After unfolding, the front folding rod and the rear folding rod are staggered vertically and horizontally. The limiting plate on the limiting block is placed at the front end of the rear folding rod. The locking assembly fixes the front crossbeam and the mounting crossbeam, and the whole vehicle is in a stable unfolded state. During driving, the weight of the seat assembly and the operator is applied to the front folding rod and the rear folding rod. The limiting plate plays a supporting role, keeping the front folding rod and the rear folding rod in a relatively static state. The advantages of this design are: 1. The front and rear folding rods are staggered vertically, with no direct contact between them. The bottom surface of the limiting plate contacts the front end of the rear folding rod, increasing the stress area and ensuring that the front and rear folding rods are not easily deformed or damaged, thus improving the service life of the scooter; 2. As the main stress-bearing component, when the limiting block is damaged, only the limiting block needs to be replaced, which is efficient and low-cost; 3. The front and rear folding rods are staggered horizontally, which allows the front and rear wheels to also be staggered horizontally, reducing the width of the scooter after folding and minimizing its footprint. Attached Figure Description
[0010] Figure 1 This is an overall structural diagram of the present invention (in its unfolded state);
[0011] Figure 2 yes Figure 1 A magnified view of a portion of position A in the middle;
[0012] Figure 3 This is an overall structural diagram of the present invention (folded state);
[0013] Figure 4 yes Figure 2 A magnified view of a portion of position B in the middle;
[0014] Figure 5 This is a diagram of the connection structure between the front folding rod and the rear folding rod in the existing technology;
[0015] Explanation of reference numerals in the attached figures:
[0016] 1. Front crossbeam; 2. Mounting crossbeam; 3. Front folding bar; 4. Rear folding bar; 5. First hinge plate;
[0017] 6. Second hinge plate; 7. Limiting block; 71. Limiting plate; 8. Locking assembly; 81. Third hinge plate;
[0018] 82. Fourth hinge plate; 821. First hinge part; 822. Second hinge part; 83. Swing rod; 84. Folding lock pin; 85. Unfolding lock pin; 86. Locking plate; 861. Unfolding lock rod; 8611. First buckle groove; 862. Folding lock rod; 8621. Guide slope; 8622. Second buckle groove; 8623. Connecting hook; 863. Handle connecting plate; 87. Connecting pin; 88. Spring; 89. Drive handle; 891. First pull rod; 892. Second pull rod. Detailed Implementation
[0019] The present invention will be further described below with reference to the accompanying drawings:
[0020] like Figure 5The diagram shows the existing connection structure of the front folding rod 3 and the rear folding rod 4. In the unfolded state, the rear folding rod 4 is located below the front folding rod 3, and the front end of the rear folding rod 4 is hinged to the middle of the front folding rod 3. During driving, under the pressure of the seat structure and the user's weight, the rear end of the front folding rod 3 is pressed against the front end of the folding rod. Since the front end of the rear folding rod 4 needs to allow for rotation (allowed at position C in the diagram), there is a gap between the front end of the rear folding rod 4 and the front folding rod 3. In other words, the front folding rod 3 and the rear folding rod 4 are not actually completely parallel, causing the rear end of the front folding rod 3 (position D in the diagram) to be pressed against the middle of the rear folding rod 4. The local pressure is very high, which can easily lead to deformation of the front folding rod 3 and the rear folding rod 4, adversely affecting the service life of the mobility scooter.
[0021] like Figures 1 to 4 As shown, a folding frame for a personal mobility vehicle includes a front crossbeam 1, a mounting crossbeam 2, a front folding rod 3, a rear folding rod 4, a first hinge plate 5, a second hinge plate 6, a limiting block 7, and a locking assembly 8. The first hinge plate 5 is fixed to the front crossbeam 1. The front end of the front folding rod 3 is rotatably mounted on the first hinge plate 5. Two sets of the first hinge plate 5 and the front folding rod 3 are provided, corresponding to the left and right sides of the front crossbeam 1. Two sets of the rear folding rod 4 are provided and fixed to the left and right sides of the mounting crossbeam 2, respectively. The two sets of rear folding rods 4 correspond to the left and right sides of the front crossbeam 1, respectively. The upper inner side of the two sets of front folding rods 3, the upper end of the second hinge plate 6 is fixed to the front end of the rear folding rod 4, the rear side of the front folding rod 3 is rotatably installed on the lower end of the second hinge plate 6, the limiting block 7 corresponds to the rear side of the second hinge plate 6 and the lower end is fixed on the front folding rod 3, the upper end of the limiting block 7 is provided with a laterally protruding limiting plate 71, the lower end surface of the limiting plate 71 contacts the upper end surface of the rear folding rod 4, the front and rear ends of the locking assembly 8 are respectively installed on the front crossbeam 1 and the mounting crossbeam 2, and are used to fix the front crossbeam 1 and the mounting crossbeam 2.
[0022] The front crossbeam 1 is equipped with the front of the scooter, front wheels and other components. The rear wheel assembly is installed at the rear end of the rear folding bar 4. The seat assembly is installed on the front folding bar 3 and the rear folding bar 4. During the unfolding process, the unfolding of the folding frame drives the scooter to unfold as a whole. After unfolding, the front folding bar 3 and the rear folding bar 4 are staggered vertically and horizontally. The limiting plate 71 on the limiting block 7 is placed at the front end of the rear folding bar 4. The locking assembly 8 fixes the front crossbeam 1 and the mounting crossbeam 2. The whole vehicle is in a stable unfolded state. During driving, the weight of the seat assembly and the operator is applied to the front folding bar 3 and the rear folding bar 4. The limiting plate 71 plays a supporting role, keeping the front folding bar 3 and the rear folding bar 4 in a relatively stationary state. The advantages of this design are: 1. The front folding rod 3 and the rear folding rod 4 are staggered vertically, with no direct contact between them. The bottom surface of the limiting plate 71 contacts the front end of the rear folding rod 4, increasing the stress area and ensuring that the front folding rod 3 and the rear folding rod 4 are not easily deformed or damaged, thereby improving the service life of the scooter; 2. As the main stress-bearing component, when the limiting block 7 is damaged, only the limiting block 7 needs to be replaced, which is efficient and low-cost; 3. The front folding rod 3 and the rear folding rod 4 are staggered horizontally, which allows the front and rear wheels to also be staggered horizontally, which helps to reduce the width of the scooter after folding and reduce the space occupied.
[0023] The lower end face of the limiting plate 71 is a downwardly protruding arc-shaped surface, and the contact surface between the rear folding rod 4 and the limiting plate 71 is a downwardly concave arc-shaped surface.
[0024] Setting the lower end face of the limiting plate 71 into an arc-shaped surface, which matches the concave arc-shaped surface on the rear folding rod 4, can further increase the force-bearing area and disperse the pressure outward, thereby improving the service life of the limiting plate 71.
[0025] The locking assembly 8 includes a third hinge plate 81, a fourth hinge plate 82, a swing rod 83, a folding locking pin 84, an unfolding locking pin 85, a locking plate 86, a connecting pin 87, a spring 88, and a drive handle 89. The lower end of the third hinge plate 81 is fixed to the front crossbeam 1, and the rear end of the fourth hinge plate 82 is fixed to the mounting crossbeam 2. The front and rear sides of the fourth hinge plate 82 are respectively provided with a first hinge portion 821 and a second hinge portion 822. The front and rear ends of the swing rod 83 are rotatably mounted on the upper end of the third hinge plate 81 and the first hinge portion 821, respectively. The folding locking pin 84 and the unfolding locking pin 85 are both fixed to the rear end of the swing rod 83 and correspond to the front and rear sides of the first hinge portion 821, respectively. The locking plate 86 includes an integrally formed unfolding locking rod 861, a folding locking rod 862, and a handle connecting plate 863. The rear end of the unfolding locking rod 861 is rotatably mounted on the second hinge portion 89. On part 822, a first latching groove 8611 is provided below the front end of the unfolding locking rod 861. The first latching groove 8611 is used to latch with the unfolding locking post 85 in the unfolded state. The connecting post 87 is fixed on the fourth hinge plate 82 and corresponds to the lower part of the second hinge part 822. The folding locking rod 862 is located between the unfolding locking post 85 and the connecting post 87 and its upper end is connected to the unfolding locking rod 861. A guide slope 8621 is provided on the rear side of the lower end of the folding locking rod 862. A second latching groove 8622 and a connecting hook 8623 are provided on the folding locking rod 862, which are sequentially located above the guide slope 8621. The second latching groove 8622 is used to latch with the folding locking post 84 in the folded state. The two ends of the spring 88 are fixed on the connecting post 87 and the connecting hook 8623, respectively. The handle connecting plate 863 is connected to the upper end of the unfolding locking rod 861. The drive handle 89 is fixed on the handle connecting plate 863.
[0026] When folding the mobility scooter, first rotate the locking plate 86 clockwise using the drive handle 89 to disengage the first latch 8611 from the unfolding locking pin 85, thus releasing the locking state. Then, lift the drive handle 89 upwards, causing the swing arm 83 to rotate counterclockwise around the first hinge 821. The rear folding rod 4 rotates clockwise relative to the front folding rod 3 via the second hinge plate 6, causing the front folding rod 3 and the rear folding rod 4 to fold. When the folding locking pin 84 touches the guide slope 8621, as the folding action continues, the folding locking pin 84 moves the guide slope 8621 away from the connecting surface. When the connecting post 87 is pressed, the spring 88 is stretched until the folding locking post 84 enters the second locking groove 8622. Under the action of the spring 88, the second locking groove 8622 locks the folding locking post 84, thus achieving locking in the folded state. Similarly, when it is necessary to unfold the vehicle, the locking plate 86 is rotated clockwise by the drive handle 89, so that the second locking groove 8622 disengages from the folding locking post 84, releasing the locking state. The drive handle 89 is then moved downwards, causing the vehicle to gradually unfold, and finally the first locking groove 8611 locks the unfolding locking post 85.
[0027] The drive handle 89 includes a first pull rod 891 and a second pull rod 892. The first pull rod 891 is horizontally arranged and its rear end is fixed on the handle connecting plate 863. The second pull rod 892 is vertically arranged and its lower end is fixed on the handle connecting plate 863.
[0028] In the unfolded state, the second lever 892 is vertical. At this time, the locking plate 86 can be rotated clockwise by the second lever 892, and the front end of the first lever 891 is tilted upward. Then, by simply lifting the first lever 891 upward, the locking plate 86 can continue to rotate clockwise and complete the folding. In the folded state, the first lever 891 is vertical. At this time, the locking plate 86 can be rotated by the first lever 891, which makes the unfolding operation easier. In this design, the drive handle 89 is set as a combination of the first lever 891 and the second lever 892, making the unfolding and folding of the mobility scooter easier to operate.
[0029] The above does not limit the technical scope of this utility model. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall still fall within the scope of the technical solution of this utility model.
Claims
1. A folding frame for a personal mobility vehicle, characterized in that: The vehicle includes a front crossbeam, a mounting crossbeam, a front folding rod, a rear folding rod, a first hinge plate, a second hinge plate, a limiting block, and a locking assembly. The first hinge plate is fixed to the front crossbeam. The front end of the front folding rod is rotatably mounted on the first hinge plate. Two sets of the first hinge plate and the front folding rod are provided, corresponding to the left and right sides of the front crossbeam. Two sets of the rear folding rod are provided and fixed to the left and right sides of the mounting crossbeam, respectively. The two sets of rear folding rods correspond to the upper inner sides of the two sets of front folding rods. On one side, the upper end of the second hinge plate is fixed to the front end of the rear folding rod, and the rear side of the front folding rod is rotatably mounted on the lower end of the second hinge plate. The limiting block corresponds to the rear side of the second hinge plate and its lower end is fixed on the front folding rod. The upper end of the limiting block is provided with a laterally protruding limiting plate, and the lower end surface of the limiting plate contacts the upper end surface of the rear folding rod. The front and rear ends of the locking assembly are respectively mounted on the front crossbeam and the mounting crossbeam for fixing the front crossbeam and the mounting crossbeam.
2. The folding frame for a personal mobility vehicle according to claim 1, characterized in that: The lower end face of the limiting plate is a downwardly protruding arc-shaped surface, and the contact surface between the rear folding rod and the limiting plate is a downwardly concave arc-shaped surface.
3. The folding frame for a personal mobility vehicle according to claim 1, characterized in that: The locking assembly includes a third hinge plate, a fourth hinge plate, a rocker arm, a folding locking pin, an unfolding locking pin, a locking plate, a connecting pin, a spring, and a drive handle. The lower end of the third hinge plate is fixed to the front crossbeam, and the rear end of the fourth hinge plate is fixed to the mounting crossbeam. The front and rear sides of the fourth hinge plate are respectively provided with a first hinge portion and a second hinge portion. The front and rear ends of the rocker arm are rotatably mounted on the upper end of the third hinge plate and the first hinge portion, respectively. The folding locking pin and the unfolding locking pin are both fixed to the rear end of the rocker arm and correspond to the front and rear sides of the first hinge portion, respectively. The locking plate includes an integrally formed unfolding locking rod, a folding locking rod, and a handle connecting plate. The rear end of the unfolding locking rod is rotatably mounted on the second hinge portion. At the joint, a first latching groove is provided below the front end of the unfolding locking rod. The first latching groove is used to latch with the unfolding locking post in the unfolded state. The connecting post is fixed on the fourth hinge plate and corresponds to the lower part of the second hinge. The folding locking rod is located between the unfolding locking post and the connecting post, and its upper end is connected to the unfolding locking rod. A guide slope is provided on the rear side of the lower end of the folding locking rod. The folding locking rod is provided with a second latching groove and a connecting hook corresponding to the upper part of the guide slope in sequence. The second latching groove is used to latch with the folding locking post in the folded state. The two ends of the spring are respectively fixed on the connecting post and the connecting hook. The handle connecting plate is connected to the upper end of the unfolding locking rod. The drive handle is fixed on the handle connecting plate.
4. The folding frame for a personal mobility vehicle according to claim 3, characterized in that: The drive handle includes a first pull rod and a second pull rod. The first pull rod is horizontally arranged and its rear end is fixed to the handle connecting plate. The second pull rod is vertically arranged and its lower end is fixed to the handle connecting plate.