Electric vehicle backrest height adjusting mechanism

Abstract

The utility model relates to an electric vehicle backrest height adjusting mechanism which comprises a rear armrest, a supporting plate, a rotating shaft, a fastening cover plate, a backrest, a backrest rear cover, a support, a rotating body and an adjusting knob. The middle of the rear end of the rear armrest is vertically connected with a supporting plate, a sliding groove is formed in the front of the supporting plate, the support can be inserted into the sliding groove in an up-down sliding mode, the rotating body is located between the bottom of the sliding groove and the support, one end of the rotating shaft is fixed to the rotating body, and the other end of the rotating shaft penetrates through the supporting plate to be connected with an adjusting knob. A through kidney-shaped hole is formed in the support, tooth surfaces are arranged on the left side and the right side of the kidney-shaped hole, a plurality of cylindrical protrusions matched with the tooth surfaces are arranged on one circumference of the front face of the rotating body, the cylindrical protrusions are meshed with the tooth surfaces, and the number of teeth on the tooth surface on one side of the kidney-shaped hole is the same as that of the cylindrical protrusions. A fastening cover plate is arranged on the front face of the supporting plate in a covering mode, a rear backrest is connected to the front face of the upper end of the support, and a backrest rear cover is connected to the rear backrest.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle backrest height adjustment technology, and more specifically, to an electric vehicle backrest height adjustment mechanism. Background Technology

[0002] With increasing societal emphasis on environmental protection and energy conservation, electric vehicles, as green, energy-saving, and emission-reducing modes of transportation, are playing an increasingly important role in public transportation. Currently, electric vehicles are widely used by consumers as a daily mode of transport. Most electric vehicles currently have passenger-carrying capabilities, meaning that in addition to the driver, other passengers can ride on them. To better ensure the safety of the rear passenger, electric vehicles are usually equipped with rear handrails and backrests.

[0003] Currently available electric vehicles with passenger-carrying functions typically have their backrests fixedly installed on the rear handrails, and these backrests are generally immovable. This means that they cannot meet the needs of different passengers in actual use. For example, passengers of different heights have different requirements for the backrest's protective height. The backrest height required by shorter passengers will not only fail to provide safety protection for taller passengers, but also make the ride uncomfortable.

[0004] Chinese patent document CN 222347214 U, published on January 14, 2025, discloses an adjustment mechanism for adjusting the height of the backrest of an electric vehicle. The mechanism includes an H-shaped lower support, a rectangular upper support, and an adjusting screw. The lower end of the H-shaped lower support has a fixing part for fixed connection to the rear armrest of the electric vehicle. The upper end of the H-shaped lower support has vertically arranged guide posts. The rectangular upper support has guide holes for the guide posts and fixing ears for fixed connection to the backrest of the electric vehicle. An adjusting screw through-hole is provided in the middle of the crossbeam of the H-shaped lower support, and an adjusting screw channel is provided in the middle of the rectangular upper support. The adjusting screw passes through both the adjusting screw through-hole and the adjusting screw channel. Furthermore, an adjusting knob is provided at the head of the adjusting screw located below the adjusting screw through-hole.

[0005] This technical solution involves using a knob to rotate the thread in a linear motion along the coaxial direction. However, the friction coefficient at the threaded joint is high, resulting in stronger friction and making operation more difficult. Furthermore, since the axis of the knob coincides with that of the threaded rod, and the knob is positioned vertically and in the middle of the H-shaped bracket, its operability is relatively poor.

[0006] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Utility Model Content

[0007] The purpose of this utility model is to provide a rear seat height adjustment mechanism for electric vehicles. This mechanism has high adjustability, good stability, simple structure, and low manufacturing cost.

[0008] This utility model provides a rear seat height adjustment mechanism for an electric vehicle, including a rear armrest, a support plate, a rotating shaft, a fastening cover plate, a rear seat back, a back cover, a bracket, a rotating body, and an adjustment knob. The support plate is vertically connected to the middle of the rear end of the rear armrest. A sliding groove is provided on the front of the support plate. The bracket can slide up and down into the sliding groove. The rotating body is located between the bottom of the sliding groove and the bracket. One end of the rotating shaft is fixed to the rotating body, and the other end of the rotating shaft passes through the support plate and is connected to the adjustment knob. A through-hole is provided on the bracket. Toothed surfaces are provided on the left and right sides of the through-hole. Multiple cylindrical protrusions that mate with the toothed surfaces are provided on one circumference of the front of the rotating body. The cylindrical protrusions mesh with the toothed surfaces. The number of teeth on one side of the toothed surface of the through-hole is the same as the number of cylindrical protrusions. The fastening cover plate is provided on the front of the support plate. The rear seat back is connected to the front of the upper end of the bracket, and the back cover is connected to the rear seat back.

[0009] Using the above technical solution, when the backrest height needs to be adjusted, the adjustment knob is rotated, which drives the rotating shaft to rotate. The rotating shaft drives the rotating body to rotate. The rotating body engages with one side of the toothed surface through a cylindrical protrusion, which in turn drives the bracket to move upward in the slide groove, further driving the backrest to rise. When the bracket reaches the highest point, the adjustment knob is rotated again, and the rotating body continues to rotate. At the same time, the cylindrical protrusion that was last engaged at the tail end will disengage from the toothed surface, and the cylindrical protrusion that was initially engaged at the front end will rotate to the toothed surface on the other side, which in turn drives the bracket to move downward in the slide groove, further driving the backrest to descend.

[0010] Furthermore, a keyway is provided on the side of the rotating shaft, and the flat key is placed in the keyway; a connecting hole is provided on the adjusting knob, and a positioning notch is provided on the inner wall of the connecting hole; the end of the rotating shaft away from the rotating body is inserted into the connecting hole, and the flat key is locked in the positioning notch.

[0011] Furthermore, an indicator arrow is provided on the surface of the adjustment knob.

[0012] Using the above technical solution, when the adjustment knob is turned counterclockwise, the linear movement of the adjustment reaches its maximum value when the indicator arrow points directly upward. At this point, if the adjustment knob is turned counterclockwise again, the cylindrical protrusion on the rotating body will begin to engage with the toothed surface on the opposite side, and the backrest will begin to descend until the indicator arrow points directly downward, at which point the backrest reaches its initial position.

[0013] Furthermore, multiple mounting holes are provided on both sides of the fastening cover plate, and multiple threaded holes that mate with the mounting holes are provided on both sides of the support plate; flat-head bolts pass through the mounting holes and the threaded holes to connect the fastening cover plate to the front of the support plate.

[0014] Furthermore, the upper end of the bracket is provided with multiple bolt holes, and the backrest is provided with multiple through holes that mate with the bolt holes. The connecting bolts pass through the through holes and the bolt holes and are locked with nuts.

[0015] Furthermore, multiple latches are provided on the back of the backrest, and multiple buckles that cooperate with the latches are provided on the back cover of the backrest, with the buckles engaging in the latches.

[0016] The electric vehicle backrest height adjustment mechanism of this utility model has less friction between the toothed surface and the rotating body, making operation easier; at the same time, the axis of the adjustment knob is at 90 degrees to the direction of linear movement, so that the adjustment position of the adjustment knob is in the front-to-back direction; the hand can operate from the back without more obstructions, making operation more convenient. Attached Figure Description

[0017] Figure 1 A schematic diagram of the structure of the electric vehicle backrest height adjustment mechanism provided in this embodiment of the utility model.

[0018] Figure 2 for Figure 1 Another perspective structural diagram of the rear seat height adjustment mechanism of a Chinese electric vehicle.

[0019] Figure 3 for Figure 1 An exploded diagram of the height adjustment mechanism for the rear seat back of a Chinese electric vehicle.

[0020] Figure 4 for Figure 1 A front view diagram of the support plate and bracket combined with the rear seat height adjustment mechanism of a Chinese electric vehicle.

[0021] Figure 5 for Figure 1 A schematic diagram of the structure of the support plate and bracket combined with the height adjustment mechanism of the rear seat back of the electric vehicle.

[0022] Figure 6 for Figure 1 A schematic diagram of the bracket for the height adjustment mechanism of the rear seat backrest of a Chinese electric vehicle.

[0023] Figure 7 for Figure 1 A structural schematic diagram of the bracket for the height adjustment mechanism of the rear seat backrest of a Chinese electric vehicle from another perspective.

[0024] Figure 8 for Figure 1 A plan view of the bracket for the height adjustment mechanism of the rear seat back of the electric vehicle.

[0025] Figure 9 for Figure 1 Another schematic diagram of the bracket for the height adjustment mechanism of the rear seat backrest of the electric vehicle.

[0026] The reference numerals and components involved in the accompanying drawings are shown below:

[0027] 1. Rear armrest; 2. Support plate; 21. Slide groove

[0028] 22. Threaded hole; 23. Flat head bolt; 24. Bolt hole

[0029] 3. Shaft 31. Flat key 4. Fastening cover plate

[0030] 41. Mounting hole 5. Backrest 51. Through hole

[0031] 52. Connecting bolts; 53. Nuts; 6. Backrest cover

[0032] 61. Buckle; 7. Bracket; 71. Waist-shaped hole

[0033] 72. Tooth surface; 8. Rotating body; 81. Cylindrical protrusion.

[0034] 9. Adjusting knob 91, indicator arrow Detailed Implementation

[0035] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0036] The terms "first," "second," "third," "fourth," etc., used in the specification and claims of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0037] Example 1

[0038] Figure 1 This is a schematic diagram of the structure of the electric vehicle backrest height adjustment mechanism provided in an embodiment of the present utility model. Figure 2 for Figure 1 Another perspective structural diagram of the rear seat height adjustment mechanism in a Chinese electric vehicle. Figure 3 for Figure 1 An exploded diagram of the rear seat height adjustment mechanism in a Chinese electric vehicle. Figure 4 for Figure 1 A front view diagram of the support plate and bracket combined with the rear seat height adjustment mechanism of a Chinese electric vehicle. Figure 5 for Figure 1A schematic diagram of the structure of the support plate and bracket combined with the rear seat height adjustment mechanism of a Chinese electric vehicle. Figure 6 for Figure 1 A schematic diagram of the bracket for the rear seat height adjustment mechanism of a Chinese electric vehicle. Figure 7 for Figure 1 A structural schematic diagram of the bracket for the rear seat height adjustment mechanism of a mid-sized electric vehicle from another perspective. Please refer to... Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 The electric vehicle backrest height adjustment mechanism provided in this embodiment includes a rear armrest 1, a support plate 2, a rotating shaft 3, a fastening cover plate 4, a backrest 5, a backrest cover 6, a bracket 7, a rotating body 8, and an adjustment knob 9. The support plate 2 is vertically connected to the middle of the rear end of the rear armrest 1. A sliding groove 21 is provided on the front of the support plate 2. The bracket 7 can slide up and down into the sliding groove 21. The rotating body 8 is located between the bottom of the sliding groove 21 and the bracket 7. One end of the rotating shaft 3 is fixed to the rotating body 8, and the other end of the rotating shaft 3 passes through the support plate 2 and connects to the support plate 2. The adjustment knob 9 is connected; a through waist-shaped hole 71 is provided on the bracket 7, and toothed surfaces 72 are provided on the left and right sides of the waist-shaped hole 71. On one circumference of the front of the rotating body 8, there are multiple cylindrical protrusions 81 that mate with the toothed surfaces 72. The cylindrical protrusions 81 and the toothed surfaces 72 mesh. The number of teeth on one side of the toothed surface 72 of the waist-shaped hole 71 is the same as the number of cylindrical protrusions 81. The fastening cover plate 4 is provided on the front of the support plate 2. The backrest 5 is connected to the front of the upper end of the bracket 7, and the backrest cover 6 is connected to the backrest 5.

[0039] Figure 8 for Figure 1 A plan view of the bracket for the rear seat height adjustment mechanism of a mid-sized electric vehicle. Figure 9 for Figure 1 Another schematic diagram of the bracket for the rear seat height adjustment mechanism of the electric vehicle. Please refer to... Figure 4 , Figure 5 , Figure 8 , Figure 9It should be noted that when the height of the backrest 5 needs to be adjusted, the adjustment knob 9 is rotated, which drives the rotating shaft 3 to rotate. The rotating shaft 3 drives the rotating body 8 to rotate. The rotating body 8 engages with the cylindrical protrusion 81 and one side of the tooth surface 72, which causes the bracket 7 to move upward in the slide groove 21, further causing the backrest 5 to rise. When the bracket 7 reaches the highest point, the adjustment knob 9 is rotated again, and the rotating body 8 continues to rotate. At the same time, the cylindrical protrusion 81 that was last engaged at the tail end will disengage from the tooth surface 72, and the cylindrical protrusion 81 that was initially engaged at the front end will rotate to the tooth surface 72 on the other side, which causes the bracket 7 to move downward in the slide groove 21, further causing the backrest 5 to fall.

[0040] The electric vehicle backrest height adjustment mechanism of this utility model has less friction between the tooth surface 72 and the rotating body 8, making operation easier; at the same time, the axis of the adjustment knob 9 is at 90 degrees to the direction of linear movement, so that the adjustment position of the adjustment knob 9 is in the front-back direction; the hand can operate from the back without more obstructions, making operation more convenient.

[0041] Further reference Figure 3 The present invention provides a keyway on the side of the rotating shaft 3, and the flat key 31 is placed in the keyway; a connecting hole is provided on the adjusting knob 9, and a positioning notch is provided on the inner wall of the connecting hole; the end of the rotating shaft 3 away from the rotating body 8 is inserted into the connecting hole, and the flat key 31 is locked in the positioning notch.

[0042] Further reference Figure 7 , Figure 8 , Figure 9 The present invention provides an indicator arrow 91 on the surface of the adjustment knob 9.

[0043] It should be noted that when the adjustment knob 9 is turned counterclockwise, the linear travel of the adjustment reaches its maximum value when the indicator arrow 91 is pointing directly upward. At this point, if the adjustment knob 9 is turned counterclockwise again, the cylindrical protrusion 81 on the rotating body 8 will begin to engage with the opposite toothed surface 72, and the backrest 5 will begin to descend until the indicator arrow 91 points directly downward, at which point the backrest 5 reaches its initial position.

[0044] Further reference Figure 3 , Figure 4 The present invention provides multiple mounting holes 41 on both sides of the fastening cover plate 4 and multiple threaded holes 22 that mate with the mounting holes 41 on both sides of the support plate 2; flat-head bolts 23 pass through the mounting holes 41 and the threaded holes 22 to connect the fastening cover plate 4 to the front of the support plate 2.

[0045] Further reference Figure 1 , Figure 3 , Figure 4 The bracket 7 of this utility model has multiple bolt holes 24 at its upper end, and multiple through holes 51 that cooperate with the bolt holes 24 are provided on the backrest 5. The connecting bolt 52 passes through the through holes 51 and the bolt holes 24 and is locked by the nut 53.

[0046] Further reference Figure 3 The present invention provides multiple slots at the back of the backrest 5, and multiple buckles 61 that cooperate with the slots are provided on the back cover 6 of the backrest, and the buckles 61 are engaged in the slots.

[0047] As can be seen from the above description, the advantages of this utility model are:

[0048] The electric vehicle backrest height adjustment mechanism of this utility model has less friction between the toothed surface and the rotating body, making operation easier; at the same time, the axis of the adjustment knob is at 90 degrees to the direction of linear movement, so that the adjustment position of the adjustment knob is in the front-back direction; the hand can operate from the back without more obstructions, making operation more convenient.

[0049] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A rear seatback height adjustment mechanism for an electric vehicle, characterized in that, Includes rear armrest (1), support plate (2), pivot (3), fastening cover plate (4), backrest (5), backrest cover (6), bracket (7), rotating body (8) and adjustment knob (9); The support plate (2) is vertically connected to the middle of the rear end of the rear armrest (1). The front of the support plate (2) is provided with a sliding groove (21). The bracket (7) can slide up and down into the sliding groove (21). The rotating body (8) is located between the bottom of the sliding groove (21) and the bracket (7). One end of the rotating shaft (3) is fixed on the rotating body (8), and the other end of the rotating shaft (3) passes through the support plate (2) and is connected to the adjustment knob (9). The bracket (7) has a through waist-shaped hole (71), and toothed surfaces (72) are provided on the left and right sides of the waist-shaped hole (71). On one of the circumferences in front of the rotating body (8), there are multiple cylindrical protrusions (81) that mate with the toothed surfaces (72). The cylindrical protrusions (81) mesh with the toothed surfaces (72). The number of teeth on one side of the toothed surface (72) of the waist-shaped hole (71) is the same as the number of cylindrical protrusions (81). The fastening cover plate (4) is provided on the front of the support plate (2), and the backrest (5) is connected to the front of the upper end of the bracket (7). The backrest cover (6) is connected to the backrest (5).

2. The electric vehicle backrest height adjustment mechanism according to claim 1, characterized in that, A keyway is provided on the side of the rotating shaft (3), and a flat key (31) is placed in the keyway; a connecting hole is provided on the adjusting knob (9), and a positioning notch is provided on the inner wall of the connecting hole; The end of the rotating shaft (3) away from the rotating body (8) is inserted into the connecting hole, and the flat key (31) is locked in the positioning notch.

3. The electric vehicle backrest height adjustment mechanism according to claim 1, characterized in that, An indicator arrow (91) is provided on the surface of the adjustment knob (9).

4. The electric vehicle backrest height adjustment mechanism according to claim 1, characterized in that, Multiple mounting holes (41) are provided on both sides of the fastening cover plate (4), and multiple threaded holes (22) that mate with the mounting holes (41) are provided on both sides of the support plate (2); flat-head bolts (23) pass through the mounting holes (41) and the threaded holes (22) to connect the fastening cover plate (4) to the front of the support plate (2).

5. The electric vehicle backrest height adjustment mechanism according to claim 1, characterized in that, The upper end of the bracket (7) is provided with multiple bolt holes (24), and the backrest (5) is provided with multiple through holes (51) that cooperate with the bolt holes (24). The connecting bolt (52) passes through the through holes (51) and the bolt holes (24) and is locked by a nut (53).

6. The electric vehicle backrest height adjustment mechanism according to claim 1, characterized in that, Multiple latches are provided on the back of the backrest (5), and multiple buckles (61) that cooperate with the latches are provided on the back cover (6). The buckles (61) are engaged in the latches.

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