Vehicle body and electric vehicle

Abstract

The vehicle body comprises a vehicle frame, a rear fork and a middle shaft, the rear fork comprises a left rocker arm and a right rocker arm, each of the left rocker arm and the right rocker arm is connected with the vehicle frame through a locking piece, an assembly hole is formed in the locking piece, and the assembly hole extends in the width direction of the vehicle frame and penetrates through the locking piece. The middle shaft penetrates through the assembly hole and is pivotally connected with the locking piece around the central axis of the assembly hole, a chain wheel is mounted on the middle shaft, and cranks are connected to the two ends of the middle shaft. The vehicle body provided by the embodiment of the utility model has the advantages of few parts, high assembly efficiency, low weight and low cost.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle technology, specifically to a vehicle body and an electric vehicle. Background Technology

[0002] In related technologies, the bottom bracket on electric vehicles is usually connected to the frame via a bottom bracket tube. However, welding the bottom bracket tube to the frame results in complex assembly processes and low efficiency, while connecting it to the frame via bolts results in poor installation accuracy. Furthermore, the bottom bracket is typically used to mount the pedal cranks, but the pedal mechanism is usually used infrequently during the electric vehicle's product lifecycle. Therefore, using the above installation methods for the bottom bracket leads to high vehicle weight and cost, while also reducing practicality. Utility Model Content

[0003] This utility model aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, embodiments of this utility model propose a vehicle body that has the advantages of fewer parts, higher assembly efficiency, and lower weight and cost.

[0005] An embodiment of this utility model also proposes an electric vehicle.

[0006] The vehicle body of this utility model embodiment includes a frame, a rear fork, and a bottom bracket. The rear fork includes a left swingarm and a right swingarm. Each of the left swingarm and the right swingarm is connected to the frame via a locking member. The locking member has a mounting hole that extends along the width direction of the frame and passes through the locking member. The bottom bracket passes through the mounting hole and is pivotally connected to the locking member around the central axis of the mounting hole. A sprocket is mounted on the bottom bracket, and cranks are connected to both ends of the bottom bracket.

[0007] According to the vehicle body of this utility model embodiment, the left and right swingarms of the rear fork are connected to the frame via locking members. The locking member is provided with a mounting hole that extends along the width direction of the frame and passes through the locking member. The bottom bracket passes through the mounting hole and is pivotally connected to the locking member around the central axis of the mounting hole, thereby completing the installation of the bottom bracket on the frame. This reduces the installation of the bottom bracket on the vehicle body, thereby reducing the number of parts on the vehicle body. This effectively improves the assembly efficiency of the vehicle body and reduces the weight and cost of the vehicle body.

[0008] In some embodiments, the frame includes a left mounting plate and a right mounting plate, and there are two locking members, one of which connects the left rocker arm and the left mounting plate, and the other of which connects the right rocker arm and the right mounting plate.

[0009] In some embodiments, both the left rocker arm and the right rocker arm are provided with a first through hole, and both the left mounting plate and the right mounting plate are provided with a second through hole;

[0010] The locking element includes a bolt and a nut. The bolt has the mounting hole. The bolt passes through the first through hole and the second through hole and is threaded into the nut. The left mounting plate and the left rocker arm are positioned between the head of one of the bolts and one of the nuts. The right mounting plate and the right rocker arm are positioned between the head of the other bolt and the other nut.

[0011] In some embodiments, the vehicle body further includes two limiting members, which are connected to the central shaft and partially protrude from the outer peripheral surface of the central shaft. The two limiting members abut against the opposite sides of the two locking members, or the two limiting members abut against the opposite sides of the two locking members.

[0012] In some embodiments, the central shaft is provided with a slot, and the limiting member includes a clamp, which is engaged in the slot.

[0013] In some embodiments, the outer peripheral surface of the central shaft is provided with a first positioning hole, and the vehicle body further includes a locking member, which is movably connected to the shank of at least one of the bolts, and the locking member has a locking position engaged in the first positioning hole and an unlocking position disengaged from the first positioning hole.

[0014] In some embodiments, the shank of one of the bolts is provided with a threaded hole extending radially along the bolt, the threaded hole communicating with the mounting hole, and the locking member threadedly engaging with the threaded hole.

[0015] In some embodiments, the rear fork further includes a left reinforcing plate and a right reinforcing plate, the left reinforcing plate being welded to the left rocker arm and the right reinforcing plate being welded to the right rocker arm, and the first through hole penetrating the left reinforcing plate and the right reinforcing plate.

[0016] In some embodiments, the left rocker arm and the right rocker arm are located between the left mounting plate and the right mounting plate, the sprocket is sleeved on the central shaft and located between the left rocker arm and the right rocker arm, the sprocket is provided with a second positioning hole, the central shaft is provided with a third positioning hole, and both the second positioning hole and the third positioning hole extend radially along the central shaft;

[0017] The vehicle body also includes a positioning pin, which engages within the second positioning hole and the third positioning hole.

[0018] The battery vehicle according to the present invention includes a body as described in any of the above embodiments.

[0019] The technical advantages of the battery vehicle according to this utility model embodiment are the same as the technical advantages of the vehicle body in the above embodiments, and will not be repeated here. Attached Figure Description

[0020] Figure 1 This is an axonometric drawing of the vehicle body according to an embodiment of the present utility model.

[0021] Figure 2 This is a top view of the vehicle body according to an embodiment of the present utility model.

[0022] Figure 3 This is a side view of the vehicle body according to an embodiment of the present utility model.

[0023] Figure 4 yes Figure 3 Sectional view of AA.

[0024] Figure label:

[0025] 1. Frame; 11. Left mounting plate; 12. Right mounting plate; 2. Rear fork; 21. Left swingarm; 22. Right swingarm; 23. Crossbeam; 24. Left reinforcing plate; 25. Right reinforcing plate; 3. Bottom bracket; 4. Locking components; 41. Bolt; 42. Nut; 5. Sprocket; 6. Crank; 7. Clamp; 8. Locking components; 9. Positioning pin. Detailed Implementation

[0026] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0027] The following is combined Figures 1-4 Describes the vehicle body according to an embodiment of the present utility model.

[0028] The vehicle body of this embodiment includes a frame 1, a rear fork 2, and a bottom bracket 3. The rear fork 2 includes a left swingarm 21 and a right swingarm 22. Each of the left swingarm 21 and the right swingarm 22 is connected to the frame 1 via a locking member 4. The locking member 4 has a mounting hole that extends along the width direction of the frame 1 and passes through the locking member 4. The bottom bracket 3 passes through the mounting hole and is pivotally connected to the locking member 4 around the central axis of the mounting hole. A sprocket 5 is mounted on the bottom bracket 3, and cranks 6 are connected to both ends of the bottom bracket 3.

[0029] According to the vehicle body of this utility model embodiment, the left rocker arm 21 and right rocker arm 22 of the rear fork 2 are connected to the frame 1 through the locking member 4. The locking member 4 is provided with a mounting hole that extends along the width direction of the frame 1 and passes through the locking member 4. The bottom bracket 3 passes through the mounting hole and is pivotally connected to the locking member 4 around the central axis of the mounting hole, thereby completing the installation of the bottom bracket 3 on the frame 1. This reduces the installation of the bottom bracket on the vehicle body, thereby reducing the number of parts of the vehicle body. This effectively improves the assembly efficiency of the vehicle body and reduces the weight and cost of the vehicle body.

[0030] It should be noted that after the bottom bracket 3 is pivotally connected to the locking member 4, both ends of the bottom bracket 3 protrude from the sides of the frame 1 and the rear fork 2, so that the crank 6 connected to the end of the bottom bracket 3 is located on the outside of the frame 1 and the rear fork 2. In addition, the mounting hole is a round hole that fits with the bottom bracket 3 with clearance. The mounting hole ensures the radial accuracy of the bottom bracket 3 and ensures that the bottom bracket 3 can rotate relative to the locking member 4 about the central axis of the mounting hole.

[0031] In some embodiments, such as Figure 1 , Figure 2 and Figure 4 As shown, the frame 1 includes a left mounting plate 11 and a right mounting plate 12. There are two locking components 4, one of which connects the left rocker arm 21 and the left mounting plate 11, and the other locking component 4 connects the right rocker arm 22 and the right mounting plate 12.

[0032] At this time, the central shaft 3 can be pivotally fitted into the mounting holes formed by the two locking parts 4. The two locking parts 4, which are spaced apart along the width direction of the frame 1, together support the central shaft 3, making the installation reliability of the central shaft 3 on the frame 1 higher.

[0033] Specifically, the left mounting plate 11 and the right mounting plate 12 are arranged in a mirror-symmetrical manner, and the left rocker arm 21 and the right rocker arm 22 are located inside or outside the left mounting plate 11 and the right mounting plate 12. A crossbeam 23 is also connected between the left rocker arm 21 and the right rocker arm 22. The crossbeam 23 is located behind the bottom bracket 3. At this time, the rear fork 2 is H-shaped, which makes its structural strength higher when mounted behind the frame 1.

[0034] In some embodiments, both the left rocker arm 21 and the right rocker arm 22 are provided with a first through hole, and both the left mounting plate 11 and the right mounting plate 12 are provided with a second through hole. The locking member 4 includes a bolt 41 and a nut 42. The bolt 41 is provided with an assembly hole. The bolt 41 passes through the first through hole and the second through hole and is threadedly engaged with the nut 42. The left mounting plate 11 and the left rocker arm 21 are limited between the head of one of the bolts 41 and one of the nuts 42, and the right mounting plate 12 and the right rocker arm 22 are limited between the head of another bolt 41 and another nut 42.

[0035] That is, part of the bottom bracket 3 is located within the first and second through holes. The structure and function of the bottom bracket 3 are similar to the crossbar of the rear fork 2 in related technologies, which is used to connect to the frame 1. This further reduces the number of parts in the vehicle body, and further reduces the weight and cost of the vehicle body. In addition, the connection between the rear fork 2 and the frame 1 is achieved by the threaded engagement of the bolt 41 and the nut 42, and the connection between the two is convenient and reliable.

[0036] Specifically, such as Figure 4 As shown, the nut 42 is first fitted onto the central shaft 3. After the central shaft 3 passes through the first and second through holes, the nut 42 is located between the left rocker arm 21 and the right rocker arm 22. After the bolt 41 is fitted onto the central shaft 3, it passes through the second and first through holes from the outside to the inside and is threaded into the nut 42. At this time, the heads of the two bolts 41 abut against the opposite sides of the left mounting plate 11 and the right mounting plate 12, respectively, and the two nuts 42 abut against the opposite sides of the left mounting plate 11 and the right mounting plate 12, respectively.

[0037] In some embodiments, the vehicle body further includes two limiting members, which are connected to the central shaft 3 and partially protrude from the outer peripheral surface of the central shaft 3. The two limiting members abut against the opposite sides of the two locking members 4, or the two limiting members abut against the opposite sides of the two locking members 4.

[0038] The two limiting components effectively limit the position of the bottom bracket 3 relative to the frame 1 in the axial direction of the bottom bracket 3, thereby effectively preventing the crank 6 and sprocket 5 on the bottom bracket 3 from moving relative to the frame 1 in the width direction and interfering with the frame 1.

[0039] Specifically, the two limiting members abut against the opposite sides of the two locking members 4, that is, the two limiting members abut against the opposite sides of the heads of the two bolts 41.

[0040] In some embodiments, such as Figure 1 and Figure 4 As shown, a groove is provided on the outer circumferential surface of the central shaft 3, and the limiting component includes a clamp 7, which is engaged in the groove. The clamp 7 provides high reliability in limiting the central shaft 3 relative to the frame 1 in the axial direction of the central shaft 3, and the engagement between the clamp 7 and the groove is simple and convenient, further improving the assembly efficiency of the vehicle body.

[0041] In some embodiments, the outer peripheral surface of the central shaft 3 is provided with a first positioning hole, and the vehicle body also includes a locking member 8, which is movably connected to the shank of at least one bolt 41. The locking member 8 has a locking position that engages with the first positioning hole and an unlocking position that disengages from the first positioning hole.

[0042] In other words, when the electric vehicle is required to have a pedal function, the locking component 8 is switched to the unlocked position. At this time, the locking component 8 does not interfere with the central shaft 3, and the central shaft 3 can rotate relative to the bolt 41 around its central axis. Then, when the crank 6 is turned, the sprocket 5 on the central shaft 3 can drive the rear wheel to rotate through the chain, realizing the pedal function. When the electric vehicle is not required to have a pedal function, that is, when the chain on the sprocket 5 is removed, the locking component 8 is switched to the locked position to prevent the central shaft 3 from rotating relative to the bolt 41.

[0043] Specifically, one of the bolts 41 has a threaded hole extending radially along its shank, which communicates with the mounting hole. The locking member 8 is threadedly engaged with the threaded hole. That is, the locking member 8 is a threaded member. By controlling the clockwise and counterclockwise rotation of the locking member 8 within the threaded hole, it can be partially inserted into and disengaged from the first positioning hole. Switching between the locked and unlocked positions of the locking member 8 is simple and convenient. At the same time, regardless of its position, the locking member 8 can be kept relatively fixed to the central shaft 3, thereby effectively preventing the locking member 8 from accidentally disengaging from the central shaft 3 and increasing the risk of loss.

[0044] It should be noted that, such as Figure 4 As shown, the first positioning hole extends radially through the central axis 3, and the part of the shank of the bolt 41 located on the central axis 3 away from the threaded hole is provided with a fourth positioning hole. When the locking member 8 is in the locked position, the locking member 8 is fitted in the first positioning hole and the fourth positioning hole.

[0045] In some embodiments, the rear fork 2 further includes a left reinforcing plate 24 and a right reinforcing plate 25. The left reinforcing plate 24 is welded to the left rocker arm 21, and the right reinforcing plate 25 is welded to the right rocker arm 22. A first through hole passes through the left reinforcing plate 24 and the right reinforcing plate 25.

[0046] The addition of the left reinforcing plate 24 and the right reinforcing plate 25 further enhances the structural strength of the rear fork 2 at the connection point with the frame 1, effectively preventing deformation of the rear fork 2 due to excessive stress at the connection point, resulting in higher stability of the vehicle body. Moreover, compared to thickening the left swingarm 21 and the right swingarm 22 as a whole, this design further reduces the weight and cost of the rear fork 2.

[0047] Specifically, such as Figure 2 and Figure 4 As shown, both the left reinforcing plate 24 and the right reinforcing plate 25 are U-shaped plates. The two side plates of the left reinforcing plate 24 are welded to the two opposite sides of the left rocker arm 21 in the width direction of the frame 1, and the two side plates of the right reinforcing plate 25 are welded to the two opposite sides of the right rocker arm 22 in the width direction of the frame 1.

[0048] In some embodiments, such as Figure 1 and Figure 4As shown, the left rocker arm 21 and the right rocker arm 22 are located between the left mounting plate 11 and the right mounting plate 12. The sprocket 5 is sleeved on the central shaft 3 and located between the left rocker arm 21 and the right rocker arm 22. The sprocket 5 has a second positioning hole, and the central shaft 3 has a third positioning hole. Both the second and third positioning holes extend radially along the central shaft 3. The vehicle body also includes a positioning pin 9, which fits into the second and third positioning holes.

[0049] The locating pin 9 connects the sprocket 5 and the central shaft 3, further ensuring the relative fixation of the sprocket 5 and the central shaft 3 in the circumferential direction of the central shaft 3, effectively preventing relative slippage between the two and affecting the reliability of pedaling the electric vehicle.

[0050] The battery vehicle according to the present invention includes a body as described in any of the above embodiments.

[0051] The technical advantages of the battery vehicle according to this utility model embodiment are the same as the technical advantages of the vehicle body in the above embodiments, and will not be repeated here.

[0052] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0054] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0055] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0056] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0057] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A vehicle body, characterized in that, include: Frame; The rear fork includes a left swingarm and a right swingarm, each of which is connected to the frame via a locking member, the locking member having a mounting hole that extends along the width of the frame and passes through the locking member; A central shaft passes through the mounting hole and is pivotally connected to the locking member about the central axis of the mounting hole. A sprocket is mounted on the central shaft, and cranks are connected to both ends of the central shaft.

2. The vehicle body according to claim 1, characterized in that, The frame includes a left mounting plate and a right mounting plate. There are two locking components, one of which connects the left rocker arm and the left mounting plate, and the other of which connects the right rocker arm and the right mounting plate.

3. The vehicle body according to claim 2, characterized in that, The left rocker arm and the right rocker arm are each provided with a first through hole, and the left mounting plate and the right mounting plate are each provided with a second through hole; The locking element includes a bolt and a nut. The bolt has the mounting hole. The bolt passes through the first through hole and the second through hole and is threaded into the nut. The left mounting plate and the left rocker arm are positioned between the head of one of the bolts and one of the nuts. The right mounting plate and the right rocker arm are positioned between the head of the other bolt and the other nut.

4. The vehicle body according to claim 2, characterized in that, The vehicle body also includes two limiting members, which are connected to the central shaft and partially protrude from the outer circumferential surface of the central shaft. The two limiting members abut against the opposite side of the two locking members, or the two limiting members abut against the opposite side of the two locking members.

5. The vehicle body according to claim 4, characterized in that, The central shaft is provided with a slot, and the limiting component includes a clamp, which is engaged in the slot.

6. The vehicle body according to claim 3, characterized in that, The outer peripheral surface of the central shaft is provided with a first positioning hole, and the vehicle body also includes a locking member, which is movably connected to the shank of at least one of the bolts. The locking member has a locking position that engages with the first positioning hole and an unlocking position that disengages from the first positioning hole.

7. The vehicle body according to claim 6, characterized in that, One of the bolts has a threaded hole extending radially along the bolt, the threaded hole communicating with the mounting hole, and the locking member threadedly engaging with the threaded hole.

8. The vehicle body according to claim 3, characterized in that, The rear fork also includes a left reinforcing plate and a right reinforcing plate. The left reinforcing plate is welded to the left rocker arm, and the right reinforcing plate is welded to the right rocker arm. The first through hole passes through the left reinforcing plate and the right reinforcing plate.

9. The vehicle body according to claim 3, characterized in that, The left rocker arm and the right rocker arm are located between the left mounting plate and the right mounting plate. The sprocket is sleeved on the central shaft and located between the left rocker arm and the right rocker arm. The sprocket is provided with a second positioning hole, and the central shaft is provided with a third positioning hole. Both the second positioning hole and the third positioning hole extend radially along the central shaft. The vehicle body also includes a positioning pin, which engages within the second positioning hole and the third positioning hole.

10. An electric vehicle, characterized in that, Includes the vehicle body as described in any one of claims 1-9.

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