A frame assembly with an adjustable rear seat

Abstract

This invention relates to the field of electric vehicle frame technology, and provides a frame assembly with an adjustable rear seat, including a frame body, a rear seat lifting mechanism, and a rear seat translation mechanism. The rear seat translation mechanism includes a rear seat mounting frame. The width sides of the rear seat mounting frame are guided and engaged with a lifting base along the front-to-back direction via sliding rails and fixed rails. The fixed rails have first locking holes spaced apart along the length of the rails. Each first locking hole is elastically connected to a locking block via a tension spring. The upper part of each locking block has a locking groove. The sliding rails have second locking holes spaced apart along the length of the rails. Each locking block is driven by a locking drive unit. The lower part of the sliding rails is supported on an elastic component, and the sliding rails can slide up and down relative to the fixed rails under the action of the elastic component. This invention overcomes the shortcomings of the prior art, has a reasonable design, is easy to adjust, and solves the technical problem of the non-adjustable front-to-back distance of the rear seat in existing electric bicycles.

Description

Technical Field

[0001] This invention relates to the field of electric vehicle frame technology, and more specifically to a frame assembly with an adjustable rear seat. Background Technology

[0002] Electric bicycles are only permitted to carry minors within a certain age range. For example, the "Regulations on the Management of Electric Bicycles in Jiangsu Province" stipulate that adults driving electric bicycles can only carry one minor under the age of sixteen. Minors differ from adults; different individuals and age groups have significant differences in body size and different needs regarding the height and distance between the rear seat and the passenger. Currently, with the same frame, the rear seat installation position of existing electric bicycles is fixed, and the rear seat itself is also fixed after installation, meaning the rear seat is not adjustable and cannot accommodate changes in the size of the rear passenger.

[0003] Although existing technologies have disclosed methods for adjusting the rear seat height using lifting components, the problem of adjusting the fore-and-aft distance of the rear seat has not been effectively solved.

[0004] Therefore, we propose a frame assembly with an adjustable rear seat. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] In view of the shortcomings of the prior art, the present invention provides a frame assembly with an adjustable rear seat, which overcomes the shortcomings of the prior art, has a reasonable design, is easy to adjust, and solves the technical problem that the front and rear distance of the rear seat of existing electric bicycles is not adjustable.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A vehicle frame assembly with an adjustable rear seat, comprising a frame body, wherein a rear seat lifting mechanism is mounted on the tailpipe of the frame body, characterized in that:

[0010] A lifting base is installed at the output end of the rear seat lifting mechanism, and a rear seat translation mechanism is installed on the upper part of the lifting base.

[0011] The rear seat translation mechanism includes a rear seat mounting frame. Both sides of the rear seat mounting frame in the width direction are guided and engaged with the lifting base in the front-to-back direction via sliding rails and fixed rails.

[0012] The fixed track has three or more first locking holes spaced apart along the length of the track. Each first locking hole is elastically connected to a locking block by a tension spring. The upper part of the locking block has a locking groove.

[0013] The sliding track has second locking holes spaced apart along the length of the track.

[0014] Each locking block is driven by a locking drive unit;

[0015] The lower part of the sliding track is supported on the elastic component, and the sliding track can slide up and down relative to the fixed track under the action of the elastic component;

[0016] When the first locking hole and the second locking hole are aligned and connected, if the locking drive unit is not activated, the locking block will be disengaged from the second locking hole under the action of the tension spring.

[0017] When the first locking hole and the second locking hole are aligned and connected, if the locking drive unit is activated, the locking block overcomes the tension spring and passes through the second locking hole, and the locking groove is located below the upper edge of the locking hole. After the rear passenger sits down, the rear seat mounting frame moves downward on both sides under the action of the passenger's weight, overcoming the action of the elastic component. The upper edge of the locking hole is engaged in the locking groove, thus locking the sliding track and the rear seat mounting frame.

[0018] Furthermore, sliding rails are installed on both sides of the rear seat mounting frame in the width direction. The sliding rails are guided and matched with the fixed rails, and the fixed rails are fixedly connected to the lifting base through synchronous blocks.

[0019] Furthermore, the locking block has side guide ramps on both sides of the width direction of the end facing the sliding track, and an upper guide ramp on its upper part.

[0020] Furthermore, the upper opening of the locking groove is provided with inner guide slopes on both sides.

[0021] Furthermore, the outer side of the fixed track is provided with a guide cylinder that is directly connected to each of the first locking holes. The locking block is slidably installed in the guide cylinder. One end of the tension spring hooks the first fixing pin in the guide sleeve, and the other end hooks the second fixing pin at the tail of the locking block. Side notches are opened on both sides of the tail of the locking block, and the aforementioned second fixing pin is fixed in the side notches.

[0022] Furthermore, the elastic component includes a movable plate, a fixed plate, guide posts, and springs. The movable plate is fixed to the lower part of the sliding track, the fixed plate is fixed to the lifting base, a pair of guide posts are fixed to the lower side of the movable plate and can penetrate downward through the fixed plate, and the springs are sleeved on the guide posts and abut against the movable plate and the fixed plate at their upper and lower ends, respectively.

[0023] Furthermore, the locking drive unit includes pins corresponding to each locking block. The pins are vertical, and their upper ends pass through the holes in the lower part of the guide cylinder and engage with the tail of the locking block via an inclined surface. Specifically, the upper end of the pin has a driving inclined surface, and the tail of the locking block has a central notch located between the two side notches. The central notch has a driving engagement inclined surface that engages with the aforementioned driving inclined surface.

[0024] Furthermore, the tail tube of the main frame extends horizontally, and a tail mounting bracket is fixed to the tail tube. The electric push rod of the rear seat lifting mechanism is installed on the tail mounting bracket, and a lifting base is installed at the output end of the electric push rod.

[0025] The electric push rods are provided in two pairs and are distributed along the front and rear direction of the rear seat.

[0026] Furthermore, reinforcing components are provided on both sides of the frame body. The reinforcing components include three reinforcing rods. The lower ends of the three reinforcing rods are fixed to each other, and their upper ends are connected in sequence to the side tubes of the frame body, the rear mounting bracket, and the tail tube of the frame body.

[0027] (III) Beneficial Effects

[0028] This invention provides a frame assembly with an adjustable rear seat, which has the following advantages:

[0029] 1. Based on the traditional rear seat lifting mechanism, a rear seat sliding mechanism has been added, which can realize the fore-and-aft adjustment of the rear seat to meet the needs of different passengers for the fore-and-aft space of the rear seat;

[0030] 2. This sliding mechanism allows passengers to easily adjust the back seat by moving their buttocks forward or backward after sitting down.

[0031] 3. A reinforcing component has been added to the rear of the main frame to increase strength and ensure the reliability of the main frame. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0033] Figure 2 for Figure 1 Enlarged structural diagram of the middle and rear seat translation mechanism and the rear seat lifting mechanism;

[0034] Figure 3 This is an isometric view of the rear seat translation mechanism in this invention;

[0035] Figure 4 for Figure 3 A magnified structural diagram of point A in the middle;

[0036] Figure 5 A cross-sectional view of the fixed track, sliding track, locking block, tension spring, pin and elastic components in the rear seat translation mechanism;

[0037] Figure 6 for Figure 5 A partially enlarged structural diagram of the fixed track, sliding track, locking block, tension spring, and pin assembly.

[0038] Figure 7A first-view structural schematic diagram of the locking block in the rear seat translation mechanism;

[0039] Figure 8 This is a structural schematic diagram of the locking block in the rear seat translation mechanism from a second perspective.

[0040] In the picture:

[0041] 1. Frame body; 11. Head tube; 12. Main beam tube; 13. Side tube; 14. Tail tube; 15. Connecting tube;

[0042] 2. Bottom mounting bracket;

[0043] 3. Rear mounting bracket;

[0044] 4. Reinforcing bar;

[0045] 5. Rear seat translation mechanism;

[0046] 51. Fixed track; 511. First groove; 512. First outward flange; 513. Guide cylinder; 5131. Through hole; 5132. First fixing pin;

[0047] 52. Sliding track; 521. Second groove; 522. Second outward flange; 523. Guide groove; 5211. Second locking hole; 52111. Upper edge of locking hole;

[0048] 54. Rear seat mounting frame;

[0049] 53. Elastic component; 531. Movable plate; 532. Fixed plate; 533. Guide post; 534. Spring;

[0050] 55. Locking block; 551. Locking groove; 552. Inner guide slope; 553. Upper guide slope; 554. Side guide slope; 555. Side notch; 556. Second fixing pin; 557. Middle notch; 5571. Drive mating slope;

[0051] 56. Tension spring;

[0052] 57. Pin; 571. Drive slope;

[0053] 6. Rear seat lifting mechanism; 61. Electric push rod; 62. Lifting base; 63. Synchronizing block. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0055] See attached document Figure 1-8 A frame assembly with an adjustable rear seat includes a frame body 1, a rear seat lifting mechanism 6, and a rear seat translation mechanism 5.

[0056] The frame body 1 includes a head tube 11, a main beam tube 12, side tubes 13, and a tail tube (existing technology). The head tube 11 is welded and fixed to the upper end of the main beam tube 12. A pair of side tubes 13 are respectively located on both sides of the main beam tube 12. The front ends of the pair of side tubes 13 are welded and fixed to the main beam tube 12, and their rear ends are connected through the welded and fixed tail tube. In this embodiment, the frame body 1 has two connecting tubes 14 and 15 located below the front ends of the side tubes 13. The front and rear ends of the connecting tubes 14 and 15 are welded and fixed to the main beam tube 12 and the side tubes 13, respectively. The bottom mounting bracket 2 is welded and fixed between the pair of connecting tubes 14 and 15. The bottom mounting bracket 2 is used to install the battery box.

[0057] The rear seat lifting mechanism 6 includes an electric push rod 61, a lifting base 62, and a synchronizing block 63. The tail tube of the frame body 1 extends horizontally, and a tail mounting bracket 3 is fixed to the tail tube. The electric push rod 61 is installed on the tail mounting bracket 3, and the output end of the electric push rod 61 is installed with the lifting base 62. There are two pairs of electric push rods 61, which are distributed along the front and rear direction of the rear seat to ensure the stability of the rear seat lifting.

[0058] The rear seat translation mechanism 5 is installed on the upper part of the lifting base 62. The rear seat translation mechanism 5 includes a rear seat mounting frame 54 (the rear of the rear seat mounting frame is equipped with a backrest, or a backrest bracket can be added for later installation of the backrest to improve safety). Both sides of the rear seat mounting frame 54 in the width direction are guided and cooperated with the lifting base 62 in the front-to-back direction through sliding rails 52 and fixed rails 51.

[0059] The fixed track 51 has three or more first locking holes spaced apart along the length of the track. Each first locking hole is elastically connected to a locking block 55 by a tension spring 56. The upper part of the locking block 55 has a locking groove 551.

[0060] The sliding track 52 has second locking holes 5211 spaced apart along the length of the track.

[0061] Each locking block 55 is driven by a locking drive unit;

[0062] The lower part of the sliding track 52 is supported on the elastic component 53, and the sliding track 52 can slide up and down relative to the fixed track 51 under the action of the elastic component 53.

[0063] In this embodiment, sliding rails 52 are installed on both sides of the rear seat mounting frame 54 in the width direction. The sliding rails 52 are guided and cooperate with the fixed rails 51. The fixed rails 51 are fixedly connected to the lifting base 62 through the synchronization block 63. The fixed track 51 includes a first groove 511 with a side-mounted U-shaped structure, and a first outward flange 512 extending vertically outward from both sides of the first groove 511. The sliding track 52 includes a second groove 521 with a side-mounted U-shaped structure, a second outward flange 522 extending vertically outward from both sides of the second groove 521, and a guide groove 523 formed by bending horizontally outward from the second outward flange 522 and then extending vertically inward. The second groove 521 of the movable track falls into the first groove 511 of the fixed track 51, and the vertical width of the second groove 521 is smaller than the vertical width of the first groove 511. The second outward flange 522 of the movable track fits against the first outward flange 512 of the fixed track 51, and its guide groove 523 fits over the first outward flange 512, so that the sliding track 52 can still form a reliable connection with the fixed track 51 during the up and down movement, preventing the sliding track 52 from falling off the fixed track 51 and ensuring the structural reliability and safety.

[0064] In this embodiment, the locking block 55 has side guide slopes 554 on both sides of the end facing the sliding track 52 in the width direction, and an upper guide slope 553 on its upper part.

[0065] In this embodiment, the upper opening of the locking groove 551 is provided with inner guide slopes 552 on both sides, so that the upper edge 52111 of the locking hole can be smoothly guided into the locking groove 551 during the downward movement of the sliding track 52.

[0066] In this embodiment, a guide cylinder 513 is provided on the outer side of the fixed track 51, communicating directly with each of the first locking holes. The locking block 55 is slidably installed inside the guide cylinder 513. One end of the tension spring 56 hooks the first fixing pin 5132 inside the guide sleeve, and the other end hooks the second fixing pin 556 at the tail of the locking block 55. Side notches 555 are provided on both sides of the tail of the locking block 55, and the aforementioned second fixing pin 556 is fixed in the side notches 555. The guide cylinder 513 is used to support the locking block 55, making the translational movement of the locking block 55 in the inward and outward directions more stable.

[0067] In this embodiment, the elastic component 53 includes a movable plate 531, a fixed plate 532, guide posts 533, and a spring 534. The movable plate 531 is fixed to the lower part of the sliding rail 52, and the fixed plate 532 is fixed to the lifting base 62. A pair of guide posts 533 are fixed to the lower side of the movable plate 531 and can penetrate downward through the fixed plate 532. The spring 534 is sleeved on the guide posts 533 and its upper and lower ends abut against the movable plate 531 and the fixed plate 532, respectively. After the rear passenger leaves, the movable plate 531, under the action of the spring 534, drives the sliding rail 52 and the rear seat installation to move upward, so that the second locking hole 5211 of the sliding rail 52 and the first locking hole of the fixed rail 51 are directly connected.

[0068] In this embodiment, the locking drive unit includes pins 57 corresponding to each locking block 55. The pins 57 are vertical, and their upper ends pass through the through holes 5131 at the bottom of the guide cylinder 513 and engage with the tail of the locking block 55 via an inclined surface. The driving component corresponding to the pin 57 can be a cylinder (not shown in the figure). The cylinder synchronous drive structure is as follows: the piston rod end of the cylinder is connected to a flat plate, and the flat plate is elastically connected vertically to each pin 57. Multiple cylinders can also be configured, with each cylinder individually driving its corresponding pin 57. In other embodiments, a corresponding linkage mechanism can be provided to replace the cylinder, allowing the retraction of the electric vehicle's kickstands and the upward movement of the pins 57 to achieve linkage.

[0069] Specifically, the upper end of the pin 57 is provided with a driving slope 571, and the tail of the locking block 55 is provided with a middle notch 557 between the two side notches 555. The middle notch 557 is provided with a driving engagement slope 5571 that cooperates with the aforementioned driving slope 571.

[0070] In this embodiment, reinforcing components are provided on both sides of the frame body 1. The reinforcing components include three reinforcing rods 4. The lower ends of the three reinforcing rods 4 are fixed to each other, and their upper ends are connected in sequence to the side tube 13, the rear mounting bracket 3, and the tail tube of the frame body 1. After the rear seat lifting mechanism 6 and the rear seat translation mechanism 5 are added to the rear of the frame body 1, the strength of the rear is improved by the reinforcing components, ensuring the reliability of the frame body 1.

[0071] In other embodiments, each pin 57 can be driven by a cylinder. Meanwhile, the positions of each locking block 55 in the second locking hole 5211 are staggered. When the front end of one locking block 55 is exactly against the gap between adjacent second locking holes 5211, the other locking blocks 55 can still be inserted into the second locking hole 5211. And through the guiding action of the side guide slope 554 (preferably, the two side walls of the second locking hole 5211 are also provided with a mating slope that cooperates with the side guide slope 554), the sliding track 52 moves back and forth, so that the remaining locking blocks 55 can be inserted into the corresponding second locking hole 5211.

[0072] When no passengers are in the back seat, for example, after the passengers in the back seat have left, the back seat mounting frame 54 and the sliding rail 52 move upward under the action of the elastic component 53. The second locking hole 5211 of the sliding rail 52 is directly connected to the first locking hole of the fixed rail 51. When the first locking hole and the second locking hole 5211 are directly connected, if the locking drive unit is not activated, the locking block 55 will exit the second locking hole 5211 under the action of the tension spring 56.

[0073] When a passenger sits down, the locking block 55 is disengaged from the second locking hole 5211 by the tension spring 56. The passenger moves the back seat, the back seat mounting frame 54, and the sliding guide rail back and forth by moving their buttocks, adjusting the space between the front and back of the back seat. Even if the front end of the locking block 55 is not completely disengaged during this process, that is, part of the front end of the locking block 55 is still inside the second locking hole 5211, the locking block 55 is disengaged outward by the pressure of the upper guide slope 553 and the upper edge 52111 of the locking hole. During the process of the passenger moving the back seat, even if part of the front end of the locking block 55 extends into the second locking hole 5211 again, it can still be disengaged from the second locking hole 5211 by the action of the side guide slope 554, ensuring the reliability of the structure.

[0074] After the passenger adjusts the rear seat to a suitable position, the locking drive unit moves the pin 57 upward. Since the pin 57 and the locking block 55 are engaged by an inclined surface, the locking block 55 can move horizontally inward (along the guide cylinder 513). At this time, the passenger raises their buttocks, allowing the locking block 55 to easily pass through the first locking block and the second locking hole 5211 against the force of the tension spring 56, so that the locking groove 551 is located below the upper edge 52111 of the locking hole. Then, the passenger sits down again, and under the passenger's weight, the rear seat, the rear seat mounting frame 54, and the sliding rail 52 move downward. The upper edge 52111 of the locking hole of the sliding rail 52 is pressed into the locking groove, achieving locking. Even if there is a slight misalignment between the locking groove and the upper edge 52111 of the locking hole during the locking process, the inner guide inclined surface 552 can guide the locking block 55 to move further inward, so that the upper edge 52111 of the locking hole can be smoothly pressed into the locking groove.

[0075] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0076] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A frame assembly with an adjustable rear seat, comprising a frame body, wherein a rear seat lifting mechanism is mounted on the tailpipe of the frame body, characterized in that: A lifting base is installed at the output end of the rear seat lifting mechanism, and a rear seat translation mechanism is installed on the upper part of the lifting base. The rear seat translation mechanism includes a rear seat mounting frame. Both sides of the rear seat mounting frame in the width direction are guided and engaged with the lifting base in the front-to-back direction via sliding rails and fixed rails. The fixed track has three or more first locking holes spaced apart along the length of the track. Each first locking hole is elastically connected to a locking block by a tension spring. The upper part of the locking block has a locking groove. The sliding track has second locking holes spaced apart along the length of the track. Each locking block is driven by a locking drive unit; The lower part of the sliding track is supported on the elastic component, and the sliding track can slide up and down relative to the fixed track under the action of the elastic component; When the first locking hole and the second locking hole are aligned and connected, if the locking drive unit is not activated, the locking block will be disengaged from the second locking hole under the action of the tension spring. When the first locking hole and the second locking hole are aligned and connected, if the locking drive unit is activated, the locking block will pass through the second locking hole under the action of the tension spring, and the locking groove will be located below the upper edge of the second locking hole. After the rear passenger sits down, the rear seat mounting frame will move down on both sides under the action of the passenger's weight, overcoming the action of the elastic component. The upper edge of the second locking hole will be engaged in the locking groove, thus locking the sliding track and the rear seat mounting frame.

2. The frame assembly with an adjustable rear seat as described in claim 1, characterized in that: Sliding rails are installed on both sides of the rear seat mounting frame in the width direction. The sliding rails are guided and matched with the fixed rails, and the fixed rails are fixedly connected to the lifting base through synchronous blocks.

3. A frame assembly with an adjustable rear seat as described in claim 2, characterized in that: The locking block has side guide ramps on both sides of the end facing the sliding track in the width direction, and an upper guide ramp on its upper part.

4. A frame assembly with an adjustable rear seat as described in claim 3, characterized in that: The upper opening of the locking groove is provided with inner guide slopes on both sides.

5. A frame assembly with an adjustable rear seat as described in claim 2, characterized in that: The outer side of the fixed track is provided with a guide cylinder that is directly connected to each of the first locking holes. The locking block is slidably installed in the guide cylinder. One end of the tension spring hooks the first fixing pin in the guide cylinder and the other end hooks the second fixing pin at the tail of the locking block. Side notches are opened on both sides of the tail of the locking block, and the aforementioned second fixing pin is fixed in the side notches.

6. A frame assembly with an adjustable rear seat as described in claim 5, characterized in that: The elastic component includes a movable plate, a fixed plate, guide posts, and springs. The movable plate is fixed to the lower part of the sliding track, the fixed plate is fixed to the lifting base, a pair of guide posts are fixed to the lower side of the movable plate and can penetrate downward through the fixed plate, and the springs are sleeved on the guide posts and abut against the movable plate and the fixed plate at their upper and lower ends, respectively.

7. A frame assembly with an adjustable rear seat as described in claim 5, characterized in that: The locking drive unit includes pins that correspond one-to-one with each locking block. The pins are vertical. The upper end of the pin passes through the hole at the bottom of the guide tube and engages with the tail of the locking block through an inclined surface. The upper end of the pin is provided with a driving inclined surface. The tail of the locking block is provided with a central notch between the two side notches. The central notch is provided with a driving engagement inclined surface that engages with the aforementioned driving inclined surface.

8. A frame assembly with an adjustable rear seat as described in claim 7, characterized in that: The tail tube of the main frame extends horizontally, and a tail mounting bracket is fixed to the tail tube. The electric push rod of the rear seat lifting mechanism is installed on the tail mounting bracket, and a lifting base is installed at the output end of the electric push rod.

9. A frame assembly with an adjustable rear seat as described in claim 8, characterized in that: The electric actuators are provided in two pairs and are distributed along the front-to-back direction of the rear seat.

10. A frame assembly with an adjustable rear seat as described in claim 7, characterized in that: The main body of the frame is equipped with reinforcing components on both sides. The reinforcing components include three reinforcing rods. The lower ends of the three reinforcing rods are fixed to each other, and their upper ends are connected to the side tubes of the main body of the frame, the rear mounting bracket, and the tail tube of the main body of the frame in sequence.

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