Reversible dual-purpose backrest
By designing a flipped dual-purpose backrest structure at the rear of the saddle of the two-wheeled electric vehicle, the problem of the existing backrest cannot be placed flat when loading cargo is solved, and the flexible flip of the backrest and the convenience of loading cargo is achieved.
Patent Information
- Application Number
- CN202422962367.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-12-02
AI Technical Summary
The backrests of existing two-wheeled electric vehicles cannot be placed horizontally when loading, which limits the convenience of loading.
A reversible dual-purpose backrest is designed, and the vertical and horizontal states of the backrest are transformed by providing a fixed seat, a rotary sleeve, a pin and an elastic element at the rear of the saddle.
The flexible flip of the backrest is achieved, which can not only keep it upright when riding to ensure safety, but also can place the backrest flat when loading cargo to facilitate the transportation of goods.
Smart Images
Figure CN223014780U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a backrest of a two-wheeled electric vehicle, in particular to a flip-type dual-purpose backrest that can be placed vertically or horizontally. Background Art
[0002] The backrest widely used on electric vehicles is generally fixed at the rear of the saddle and remains upright. When riding, the rear-seat passenger can rely on the backrest, which is relatively safe. However, when carrying goods, due to the limitation of the vertical backrest, the backrest cannot be laid flat horizontally, and the backrest cannot be flush with the goods rack, making it very inconvenient to carry goods. Content of the Utility Model
[0003] The purpose of the utility model is to provide a flip-type dual-purpose backrest, which is more convenient for users to choose according to their needs when riding. When riding, the rear-seat passenger can erect the backrest and rely on it, which is relatively safe; when carrying goods on the rear seat, the backrest can be laid flat to make the backrest flush with the goods rack, facilitating the carrying of goods. It has a simple and ingenious structure, convenient vertical or horizontal flipping operation of the backrest, low cost, and is suitable for popularization and application.
[0004] To achieve the above purpose, the utility model provides the following technical solutions:
[0005] A flip-type dual-purpose backrest is arranged at the rear of the saddle. A fixed seat with opposite left ear and right ear is fixed on the saddle, and a left ear hole and a right ear hole are respectively opened on the left ear and the right ear; two key grooves are opened around the left ear hole, and the two key grooves are perpendicular to each other; a rotating sleeve is fixed at the lower end of the backrest frame, and both ends of the rotating sleeve are respectively in contact with the opposite inner sides of the left ear and the right ear. A card slot extending parallel to the axial direction of the rotating sleeve is opened on the inner wall of the rotating sleeve; a key is fixed on the outer circumference of the pin shaft and extends into the card slot; the pin shaft passes through the rotating sleeve and the left ear hole and the right ear hole; an elastic element that normally pushes the pin shaft to move leftward is arranged between the pin shaft and the fixed seat; a retaining pin is arranged at the right end of the pin shaft close to the right ear hole; under the action of the elastic element, the retaining pin is in contact with the outer side of the right ear, and the pin shaft cannot slide leftward. The key simultaneously extends into the card slot and one of the key grooves, and the rotating sleeve and the pin shaft cannot rotate relative to the fixed seat around the axis of the pin shaft; when overcoming the acting force of the elastic element to push the pin shaft to move rightward, the key moves rightward along the card slot until the key disengages from the key groove, and the rotating sleeve and the pin shaft can rotate relative to the fixed seat around the axis of the pin shaft.
[0006] For the above flip-type dual-purpose backrest, the pin shaft is a stepped shaft with a large diameter at the left part and a small diameter at the right part, and the elastic element is a compression spring located between the step of the stepped shaft and the inner side of the right ear.
[0007] For the above flip-type dual-purpose backrest, a retaining disc is fixed at the left end of the pin shaft. When overcoming the acting force of the elastic element to push the pin shaft to move rightward, the key moves rightward along the card slot. When the key disengages from the key groove, the retaining disc is in contact with the outer side of the left ear, and the pin shaft cannot continue to move rightward.
[0008] For the above-mentioned reversible dual-purpose backrest, the clamping key is a square key with a rectangular cross-section.
[0009] For the above-mentioned reversible dual-purpose backrest, the retaining pin is an open pin radially passing through the pin shaft.
[0010] For the above-mentioned reversible dual-purpose backrest, the backrest frame is provided with backrest sponge.
[0011] For the above-mentioned reversible dual-purpose backrest, the saddle is the saddle of a two-wheel electric vehicle.
[0012] Advantages of the present utility model:
[0013] Under the action of the elastic element, the retaining pin contacts the outer side of the right ear, and the pin shaft cannot slide to the left. At this time, the clamping key extends into the card slot and a key slot at the same time, and the rotating sleeve and the pin shaft cannot rotate relative to the fixed seat around the axis of the pin shaft, and the backrest cannot be flipped, ensuring that the backrest is in the set position. The set position can be the upright state of the backrest or the horizontal state.
[0014] Of course, if it is necessary to lay the vertical backrest flat or erect the backrest in the horizontal state, it is only necessary to overcome the acting force of the elastic element to push the pin shaft to move to the right, so that the clamping key moves to the right along the card slot until the clamping key disengages from the key slot. At this time, the rotating sleeve and the pin shaft can rotate relative to the fixed seat around the axis of the pin shaft. Then flip the backrest by 90°. When the clamping key is aligned with the other key slot in the axial direction, the clamping key and the pin shaft slide to the left under the action of the elastic element again, and the clamping key enters the other key slot. The transformation between the vertical and horizontal states of the backrest is realized.
[0015] The retaining disc can prevent the left end of the pin shaft from disengaging from the left ear when pushing the pin shaft to the right. Description of the drawings
[0016] Figure 1 It is an overall schematic diagram of the saddle, backrest, etc.
[0017] Figure 2 and 3 are all three-dimensional connection diagrams of the fixed seat, backrest, etc.
[0018] Figure 4 It is a connection schematic diagram of the backrest frame, rotating sleeve, fixed seat, etc.
[0019] Figure 5 It is Figure 4 The B-B cross-sectional view of
[0020] Figure 6 It is Figure 5 The A-A cross-sectional view of
[0021] Figure 7 It is a connection relationship diagram of the fixed seat, pin shaft, compression spring, etc.
[0022] Figure 8 It is a connection diagram of split pins, pin shafts, compression springs, etc.
[0023] Figure 9 It is a three-dimensional view of the fixed seat.
[0024] In the figure, there are saddle 1, fixed seat 2, left ear 21, right ear 22, left ear hole 210, right ear hole 220, keyway one 211, keyway two 212, backrest frame 3, rotating sleeve 4, card slot 41, pin shaft 5, retaining disc 51, square key 6, split pin 7, compression spring 8, and backrest sponge 9. Specific embodiments
[0025] The following further describes the specific embodiments of the present invention with reference to the drawings.
[0026] See Figure 1-3 , a reversible and dual-purpose backrest is provided at the rear of the saddle 1 of a two-wheeled electric vehicle. See Figure 9 , a fixed seat 2 with opposite left ear 21 and right ear 22 is fixed on the saddle 1, and a left ear hole 210 and a right ear hole 220 are respectively opened on the left ear and the right ear; a keyway one 211 and a keyway two 212 are opened around the left ear hole, and the keyway one 211 and the keyway two 212 are located on a circumference centered on the axis of the left ear hole, and the keyway one 211 and the keyway two 212 are perpendicular to each other (the central angle between the keyway one 211 and the keyway two 212 in the circumferential direction is 90°).
[0027] A rotating sleeve 4 is fixed at the lower end of the backrest frame 3. The two ends of the rotating sleeve 4 are respectively in contact with the inner sides opposite to the left ear and the right ear, and a card slot 41 extending parallel to the axial direction of the rotating sleeve is opened near the left end on the inner wall of the rotating sleeve 4.
[0028] See Figure 6 , the pin shaft 5 passes through the rotating sleeve, the left ear hole and the right ear hole. The pin shaft 5 is a stepped shaft with a larger diameter on the left and a smaller diameter on the right. A retaining disc 51 is integrally fixed at the left end of the pin shaft 5. A square key 6 with a rectangular cross-section that extends into the card slot 41 is fixed on the outer circumference of the larger-diameter left part of the pin shaft; the split pin 7 passes through the right end of the pin shaft 5 along the radial direction of the pin shaft. The compression spring 8 surrounds the smaller-diameter right part of the pin shaft, and the two ends of the compression spring 8 respectively abut against the step of the pin shaft 5 and the inner side of the right ear 22. The widths of the square key 6, the card slot 41, the keyway one 211, and the keyway two 212 are equal, and the square key 6 can slide axially in the card slot 41 and the keyway one 211 (or the keyway two 212).
[0029] Under the action of the compression spring 8, the split pin 7 contacts the outer side of the right ear 22, and the pin shaft cannot slide leftward relative to the fixed seat and the rotating sleeve. At the same time, the square key 6 extends into the card slot 41 and a key slot (key slot one 211 or key slot two 212). The rotating sleeve and the pin shaft cannot rotate relative to the fixed seat around the axis of the pin shaft, and the backrest 10 (including the backrest frame 3 and the backrest sponge 9 fixed on the front side of the backrest frame 3) cannot be flipped. When the acting force of the compression spring 8 is overcome and the pin shaft 5 is pushed to move rightward, the square key 6 also moves rightward along the card slot 41 until the left end of the square key 6 disengages from the key slot one 211 or the key slot two 212, and the retaining disc 51 contacts the outer side of the left ear 21. The rotating sleeve and the pin shaft can rotate relative to the fixed seat around the axis of the pin shaft, and the backrest can be flipped.
[0030] When the backrest is flipped until the square key 6 is axially aligned with the key slot one 211 or the key slot two 212, the square key 6 and the pin shaft 5 will slide leftward under the action of the compression spring 8, and the left end of the square key 6 enters the key slot one 211 or the key slot two 212. At this time, the backrest is fixed and cannot be flipped.
[0031] When the left end of the square key 6 enters the key slot one 211, the backrest 10 is in a horizontal state. When the left end of the square key 6 enters the key slot two 212, the backrest is in a vertical state.
[0032] The protection scope of the present utility model includes but is not limited to the above embodiments. The protection scope of the present utility model is subject to the claims. Any replacement, deformation, and improvement that are easily conceivable by those skilled in the art to this technology fall within the protection scope of the present utility model.
Claims
1. A reversible dual-purpose backrest, arranged at the rear of the saddle, characterized by: A fixing seat with a left ear and a right ear opposite to each other is fixed on the saddle, and a left ear hole and a right ear hole are respectively opened on the left ear and the right ear; two key slots are opened around the left ear hole, and the two key slots are perpendicular to each other; a rotating sleeve is fixed at the lower end of the backrest frame, and the two ends of the rotating sleeve are respectively in contact with the inner sides of the left ear and the right ear, and a slot extending parallel to the axial direction of the rotating sleeve is opened on the inner wall of the rotating sleeve; the pin passes through the rotating sleeve and the left ear hole and the right ear hole; a key extending into the slot is fixed on the outer periphery of the pin; a normal An elastic element pushes the pin shaft to move left; a stop pin is provided at the right end of the pin shaft close to the right ear hole; under the action of the elastic element, the stop pin contacts the outer side of the right ear, the pin shaft cannot slide to the left, the key extends into the slot and a key slot at the same time, and the swivel sleeve and the pin shaft cannot rotate around the pin shaft axis relative to the fixed seat; when the force of the elastic element is overcome to push the pin shaft to move right, the key moves to the right along the slot until the key is out of the key slot, and the swivel sleeve and the pin shaft can rotate around the pin shaft axis relative to the fixed seat.
2. The reversible dual-purpose backrest according to claim 1, characterized in that: The pin shaft is a stepped shaft with a large diameter at the left part and a small diameter at the right part, and the elastic element is a compression spring located between the step of the stepped shaft and the inner side of the right ear.
3. The reversible dual-purpose backrest according to claim 1, characterized in that: A baffle is fixed to the left end of the pin shaft. When the pin shaft is pushed to the right by overcoming the force of the elastic element, the key moves to the right along the slot. When the key is out of the key slot, the baffle contacts the outer side of the left ear and the pin shaft cannot continue to move to the right.
4. The reversible dual-purpose backrest according to claim 1, characterized in that: A card key is a square key with a rectangular cross section.
5. The reversible dual-purpose backrest according to claim 1, characterized in that: The stop pin is a split pin that passes radially through the pin shaft.
6. The reversible dual-purpose backrest according to claim 1, characterized in that: The backrest frame is provided with a backrest sponge.
7. The reversible dual-purpose backrest according to claim 1, characterized in that: The saddle is the saddle of a two-wheeled electric vehicle.