Rear motor driving mechanism of cross-country motorcycle

Abstract

The utility model discloses a rear motor driving mechanism of a cross-country motorcycle, which comprises a left rear fork, a right rear fork, a rear wheel assembly and a motor, two ends of the rear wheel assembly are rotatably arranged on the left rear fork and the right rear fork respectively, the motor is arranged between the left rear fork and the right rear fork and used for driving the rear wheel assembly to rotate, and one of the left rear fork and the right rear fork is provided with a mounting seat. An avoiding hole is formed in the mounting seat, the avoiding hole is provided with an opening, so that an output shaft can be taken out from the opening or put into the avoiding hole when the motor is mounted or dismounted, when the motor is mounted, the output shaft of the motor is put into the avoiding hole from the opening, the motor is fixed on the mounting seat through a bolt, and when the motor is dismounted, the bolt is taken down, and the motor is dismounted. An output shaft of the motor is taken out from the opening. Compared with the prior art, the utility model has the advantage that the motor is simple and quick to mount and dismount.

Description

Technical Field

[0001] The utility model relates to the technical field of off-road motorcycles, in particular to a rear motor driving mechanism of an off-road motorcycle. Background Art

[0002] Off-road motorcycles, also known as off-road two-wheeled motorcycles, are a type of motorcycle used in closed off-road circuits for motorcycle sports or all-terrain vehicle racing. With the development of the times and the emphasis on environmental protection, most off-road motorcycles on the market are driven by electric motors, gradually replacing traditional motorcycles driven by internal combustion engines.

[0003] For example, the Chinese utility model patent "Electric Motorcycle Rear Drive Axle Device" with patent publication number CN219487667U includes a motor, a left rear fork, a right rear fork, fixing bolts and a rear wheel, wherein the left rear fork and the right rear fork are respectively located on both sides of the motor and are fixed to both ends of the motor by fixing bolts, and the rear wheel is installed between the rear ends of the left rear fork and the right rear fork; a large pulley is provided at the right end of the rear wheel, a small pulley is provided at the right end of the motor, a large belt is provided on the small pulley, and the small pulley is connected to the large pulley through the large belt.

[0004] In the above scheme, when installing or disassembling the motor, it is necessary to remove all the fixing bolts on both sides of the motor, and completely disassemble one of the left rear fork and the right rear fork before the motor can be removed, which makes installation and disassembly more troublesome. Utility Model Content

[0005] The utility model aims at the problem that it is troublesome to disassemble and install the rear drive motor of a motorcycle. The technical problem to be solved by the utility model is to provide a rear motor drive mechanism of an off-road motorcycle to solve the above problem.

[0006] The utility model adopts the following technical solution to solve the above technical problems: a rear motor drive mechanism of an off-road motorcycle comprises a left rear fork, a right rear fork, a rear wheel assembly with two ends rotatably arranged on the left rear fork and the right rear fork, and a motor arranged between the left rear fork and the right rear fork for driving the rear wheel assembly to rotate, a mounting seat is arranged on one of the left rear fork and the right rear fork, a avoidance hole is arranged on the mounting seat, the avoidance hole has an opening so that the output shaft of the motor can be taken out from the opening or put into the avoidance hole when installing or disassembling, when the motor is installed, the output shaft of the motor is put into the avoidance hole from the opening and the motor is fixed to the mounting seat by bolts, when the motor is disassembled, the bolts are removed and the output shaft of the motor is taken out from the opening.

[0007] A further preferred solution of the utility model is: it also includes a connecting frame, and two ends of the connecting frame are respectively fixedly connected to the left rear fork and the right rear fork.

[0008] A further preferred scheme of the utility model is that the connecting frame is a V-shaped or U-shaped structure, the connecting frame is arranged on one side of the left rear fork and the right rear fork, and both sides of the connecting frame have upper and lower connecting heads, the upper and lower connecting heads on the left side of the connecting frame are respectively fixedly installed on the upper side and the lower side of the left rear fork, and the upper and lower connecting heads on the right side of the connecting frame are respectively fixedly installed on the upper side and the lower side of the right rear fork.

[0009] A further preferred scheme of the utility model is: the rear wheel assembly includes a rear wheel and a sprocket fixedly connected to the rear wheel hub and on the same side as the motor output shaft, there is a spacing between the mounting seat and the left rear fork or the right rear fork for placing the motor output shaft, a driving gear is fixedly provided on the output shaft on the motor, and the driving gear and the sprocket are connected by a chain transmission.

[0010] A further preferred scheme of the utility model is: the rear wheel assembly also includes a wheel axle, the wheel hub of the rear wheel is sleeved on the rear wheel axle, and a bearing is sleeved between the wheel hub and the wheel axle, the lower sides of the left rear fork and the right rear fork are provided with runway-type bar holes, the two ends of the rear wheel axle are respectively slidably arranged in the runway-type bar holes, and the left side of the wheel axle and the left rear fork, and the right side of the wheel axle and the right rear fork are provided with adjusting parts for adjusting the chain tension.

[0011] A further preferred scheme of the utility model is: the adjusting member includes an adjusting rod and a limiting nut, one end of the adjusting rod is provided with an annular sleeve sleeved on the wheel axle, the lower ends of the left rear fork and the right rear fork are respectively provided with baffles perpendicular to the left rear fork and the right rear fork and extending outward, the baffles are provided with through holes for the adjusting rod to pass through, the end of the adjusting rod away from the annular sleeve passes through the through hole and cooperates with the limiting nut thread to fix the connecting rod.

[0012] A further preferred solution of the utility model is: a mounting hole for mounting the motor is provided on the mounting seat, a mounting hole corresponding to the connecting hole is provided on one side of the motor output shaft, and bolts pass through the mounting hole and the connecting hole in sequence and cooperate with nuts to fix the motor on the mounting seat.

[0013] A further preferred solution of the utility model is that a protective cover for covering the chain can be detachably provided on the left rear fork or the right rear fork.

[0014] A further preferred solution of the utility model is: the protective cover is provided with a first fixing hole for connection, and the left rear fork or the right rear fork has second fixing holes on both sides that cooperate with the first fixing holes, and the bolts pass through the first fixing holes and the second fixing holes and cooperate with the nuts to fix the protective cover on the left rear fork or the right rear fork.

[0015] A further preferred solution of the utility model is: a fixed seat is provided on the left rear fork or the right rear fork, a connecting arm is rotatably connected to the fixed seat via a connecting shaft, a tensioning wheel for tensioning the chain is rotatably provided on the connecting arm, a torsion spring is sleeved on the connecting shaft, one free end of the torsion spring rests on the fixed seat, the other free end rests on the connecting arm, and the connecting arm is always subjected to the outward elastic force of the torsion spring.

[0016] Compared with the prior art, the utility model has the following advantages: a mounting seat is provided on one of the left rear fork and the right rear fork, and an avoidance hole is provided on the mounting seat. The avoidance hole has an opening so that the output shaft of the motor can be taken out from the opening or put into the avoidance hole when installing or disassembling. When the motor is installed, the output shaft of the motor is put into the avoidance hole from the opening and the motor is fixed to the mounting seat by bolts. When the motor is disassembled, the bolts are removed and the output shaft of the motor is taken out from the opening. Compared with the prior art, when the motor is installed or disassembled, it is necessary to remove all the fixing bolts on both sides of the motor and completely disassemble one of the left rear fork and the right rear fork before the motor can be removed. In this scheme, the installation and disassembly of the motor only requires removing the bolts on the mounting seat, which is simple and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings and preferred embodiments. However, those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and should not be regarded as limiting the scope of the present invention. Furthermore, unless otherwise specified, the drawings only conceptually represent the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0018] Figure 1 This is one of the three-dimensional structural schematic diagrams of the preferred embodiment of the utility model;

[0019] Figure 2 This is the second schematic diagram of the three-dimensional structure of the preferred embodiment of the utility model;

[0020] Figure 3 This is the third schematic diagram of the three-dimensional structure of the preferred embodiment of the utility model;

[0021] Figure 4 This is a schematic structural diagram of the left rear fork, the right rear fork and the motor in the preferred embodiment of the utility model;

[0022] Figure 5 This is the preferred embodiment of the utility model Figure 4 A partial enlarged view of the middle A;

[0023] Figure 6 It is an exploded view of a preferred embodiment of the utility model.

[0024] In the figure: 1, left rear fork; 11, track-shaped hole; 2, right rear fork; 22, second fixing hole; 3, rear wheel assembly; 31, rear wheel; 32, sprocket; 33, wheel axle; 34, wheel hub; 4, motor; 41, driving gear; 42, connecting hole; 5, mounting seat; 51, avoidance hole; 52, opening; 53, mounting hole; 6, connecting frame; 7, adjusting member; 71, adjusting rod; 72, limiting nut; 73, annular sleeve; 8, baffle; 81, perforation; 9, protective cover; 91, first fixing hole. 10, fixing seat; 101, connecting shaft; 102, connecting arm; 103, tension wheel; 104, torsion spring. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are only descriptive and exemplary and should not be construed as limiting the protection scope of the present invention.

[0026] It should be noted that like reference numerals denote similar items in the following drawings, and thus, once an item is defined in one drawing, it may not be further defined or explained in subsequent drawings.

[0027] This embodiment mainly describes the rear motor drive mechanism of an off-road motorcycle, as follows:

[0028] like Figures 1 to 6 As shown, the rear motor drive mechanism of the off-road motorcycle comprises a left rear fork 1, a right rear fork 2, a rear wheel assembly 3 and a motor 4. The rear wheel assembly 3 is respectively arranged on the left rear fork 1 and the right rear fork 2 and is located at the lower side of the left rear fork 1 and the right rear fork 2. The motor 4 is arranged between the left rear fork 1 and the right rear fork 2 and is used to drive the rear wheel assembly 3 to rotate. The rear wheel assembly 3 is driven to rotate by the motor 4 to drive the off-road motorcycle to start. A mounting seat 5 is arranged on one of the left rear fork 1 and the right rear fork 2, and an avoidance hole 51 is arranged on the mounting seat 5. The avoidance hole 51 has an opening 52 so that the output shaft of the motor 4 can be taken out from the opening 52 or put into the avoidance hole 51 when installing or disassembling. When the motor 4 is installed, the output shaft of the motor 4 is put into the avoidance hole 51 from the opening 52 and the motor 4 is fixed to the mounting seat 5 by bolts. When the motor 4 is disassembled, the bolts are removed and the output shaft of the motor 4 is taken out from the opening 52. Compared with the prior art, the installation and disassembly of the motor 4 in this scheme only requires removing the bolts on the mounting seat 5, and the disassembly of the motor 4 is simple and quick.

[0029] Specifically, the mounting base 5 is provided with a plurality of mounting holes 53 for mounting the motor 4, and a mounting hole 53 corresponding to the connecting hole 42 is provided on one side of the output shaft of the motor 4. The mounting holes 53 correspond to the connecting holes 42 one by one. The bolts pass through the mounting holes 53 and the connecting holes 42 in sequence and cooperate with nuts to fix the motor 4 on the mounting base 5.

[0030] like Figure 2 , Figure 3 and Figure 4 As shown, the rear motor 4 driving mechanism of the off-road motorcycle also includes a connecting frame 6, which is used to connect and fix the left rear fork 1 and the right rear fork 2, and the two ends of the connecting frame 6 are respectively fixedly connected to the left rear fork 1 and the right rear fork 2, and the connecting frame 6 is a V-shaped or U-shaped structure. The connecting frame 6 is arranged on one side of the left rear fork 1 and the right rear fork 2, and both sides of the connecting frame 6 have upper and lower connecting heads. The upper and lower connecting heads on the left side of the connecting frame 6 are respectively fixedly installed on the upper side and the lower side of the left rear fork 1, and the upper and lower connecting heads on the right side of the connecting frame 6 are respectively fixedly installed on the upper side and the lower side of the right rear fork 2. Preferably, the connecting frame 6 is welded or integrally formed with the left rear fork 1 and the right rear fork 2, and the setting of the connecting frame 6 can enhance the stability of the left rear fork 1 and the right rear fork 2.

[0031] like Figures 1 to 6 The rear wheel assembly 3 includes a rear wheel 31, an axle 33, and a sprocket 32 ​​fixedly connected to the hub 34 of the rear wheel 31 and on the same side as the output shaft of the motor 4. There is a spacing between the mounting seat 5 and the left rear fork 1 or the right rear fork 2 for placing the output shaft of the motor 4. Specifically, when the mounting seat 5 is arranged on the left rear fork 1, there is a spacing between the mounting seat 5 and the left rear fork 1 for placing the output shaft of the motor 4. When the mounting seat 5 is arranged on the right rear fork 2, there is a spacing between the mounting seat 5 and the right rear fork 2 for placing the output shaft of the motor 4. The output shaft of the motor 4 is fixed with a driving gear 41, and the driving gear 41 and the sprocket 32 ​​are connected by a chain transmission. The hub 34 of the rear wheel 31 is sleeved on the shaft of the rear wheel 31, and a bearing is sleeved between the hub 34 and the axle 33. The lower sides of the left rear fork 1 and the right rear fork 2 are provided with a runway-shaped bar hole 11, and the two ends of the shaft of the rear wheel 31 are respectively slidably arranged in the runway-shaped bar hole 11, and the left side of the axle 33 and the left rear fork 1, the right side of the axle 33 and the right rear fork 2 are provided with a chain tension adjustment mechanism. The adjusting member 7 is tightened, and the adjusting member 7 includes an adjusting rod 71 and a limiting nut 72. One end of the adjusting rod 71 is provided with an annular sleeve 73 sleeved on the wheel axle 33. The lower ends of the left rear fork 1 and the right rear fork 2 are respectively provided with baffles 8 perpendicular to the left rear fork 1 and the right rear fork 2 and extending outward. The baffle 8 is provided with a through hole 81 for the adjusting rod 71 to pass through. The end of the adjusting rod 71 away from the annular sleeve 73 passes through the through hole 81 and is threadedly matched with the limiting nut 72 to fix the connecting rod. When the chain is used for a long time, When loosening, rotate the limit nut 72, the limit nut 72 and the adjusting rod 71 thread match, the limit nut 72 abuts against the baffle 8, under the joint action of the limit nut 72 and the baffle 8, the wheel axle 33 moves downward, increasing the distance between the sprocket 32 ​​and the driving gear 41, thereby tightening the chain. Preferably, the limit nut 72 is a nut, the width of the nut is greater than the width of the perforation 81, and when the chain is in a tensioned state, the limit nut 72 always abuts against the bottom of the baffle 8.

[0032] Specifically, a protective cover 9 for covering the chain is detachably provided on the front and rear sides of the left rear fork 1 or the right rear fork 2. Specifically, when the motor 4 is provided on the left rear fork 1, the protective cover 9 is detachably provided on the front and rear sides of the left rear fork 1; when the motor 4 is provided on the right rear fork 2, the protective cover 9 is detachably provided on the front and rear sides of the right rear fork 2. Since the off-road motorcycle can be driven on different roads and mountains, the design of the protective cover 9 can prevent the chain from being scratched by external factors during the driving of the off-road motorcycle, thereby causing damage to or breakage of the chain.

[0033] like Figure 3 As shown, the left protective cover 9 is provided with a first fixing hole 91 connected thereto, and second fixing holes 22 cooperating with the first fixing hole 91 are provided on both sides of the left rear fork 1 or the right rear fork 2. Bolts pass through the first fixing hole 91 and the second fixing hole 22 and cooperate with nuts to fix the protective cover on the left rear fork 1 or the right rear fork 2. The protective cover 9 has two parts, which are respectively arranged on both sides of the left rear fork 1 or the right rear fork 2.

[0034] like Figure 1 As shown, a fixed seat 10 is provided on the left rear fork 1 or the right rear fork 2. Specifically, when the mounting seat 5 is provided on the left rear fork 1 and the chain and sprocket 32 ​​are located on the side close to the left rear fork 1, the fixed seat 10 is provided on the left rear fork 1. When the mounting seat 5 is provided on the right rear fork 2 and the chain and sprocket 32 ​​are located on the side close to the right rear fork 2, the fixed seat 10 is provided on the right rear fork 2. A connecting arm 102 is rotatably connected to the fixed seat 10 through a connecting shaft 101. A tensioning wheel 103 for tensioning the chain is rotatably provided on the connecting arm 102. A torsion spring 104 is sleeved on the connecting shaft 101. One free end of the torsion spring 104 abuts against the fixed seat 10 and the other free end abuts against the connecting arm 102. The connecting arm 102 is always subjected to the outward elastic force of the torsion spring 104. When the chain is loose, the connecting arm 102 automatically tightens the chain under the action of the elastic force of the torsion spring 104.

[0035] In the description of the present utility model, it should be noted that the terms "upper", "lower", "front", "back", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.

[0036] The rear motor drive mechanism of the off-road motorcycle provided by the utility model is introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the utility model and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified. These improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A rear motor drive mechanism for an off-road motorcycle, comprising a left rear fork, a right rear fork, a rear wheel assembly rotatably mounted on the left rear fork and the right rear fork at both ends, and a motor mounted between the left rear fork and the right rear fork for driving the rear wheel assembly to rotate, characterized in that: A mounting seat is provided on one of the left rear fork and the right rear fork, and a avoidance hole is provided on the mounting seat. The avoidance hole has an opening so that the output shaft of the motor can be taken out from the opening or put into the avoidance hole when installing or disassembling. When the motor is installed, the output shaft of the motor is put into the avoidance hole from the opening and the motor is fixed to the mounting seat by bolts. When the motor is disassembled, the bolts are removed and the output shaft of the motor is taken out from the opening.

2. The rear motor drive mechanism of an off-road motorcycle according to claim 1, characterized in that: It also includes a connecting frame, two ends of which are respectively fixedly connected to the left rear fork and the right rear fork.

3. The rear motor drive mechanism of an off-road motorcycle according to claim 2, characterized in that: The connecting frame is a V-shaped or U-shaped structure, and the connecting frame is arranged on one side of the left rear fork and the right rear fork. There are upper and lower connecting heads on both sides of the connecting frame. The upper and lower connecting heads on the left side of the connecting frame are respectively fixedly installed on the upper side and the lower side of the left rear fork, and the upper and lower connecting heads on the right side of the connecting frame are respectively fixedly installed on the upper side and the lower side of the right rear fork.

4. The rear motor drive mechanism of an off-road motorcycle according to claim 1, characterized in that: The rear wheel assembly includes a rear wheel and a sprocket fixedly connected to the rear wheel hub and on the same side as the motor output shaft. There is a spacing between the mounting seat and the left rear fork or the right rear fork for placing the motor output shaft. A driving gear is fixedly provided on the output shaft of the motor, and the driving gear and the sprocket are connected by a chain transmission.

5. The rear motor drive mechanism of an off-road motorcycle according to claim 4, characterized in that: The rear wheel assembly also includes an axle, the hub of the rear wheel is sleeved on the rear wheel axle, and a bearing is sleeved between the hub and the axle, the lower sides of the left rear fork and the right rear fork are provided with runway-shaped bar holes, the two ends of the rear wheel axle are respectively slidably arranged in the runway-shaped bar holes, and the left side of the axle and the left rear fork, the right side of the axle and the right rear fork are provided with adjusting parts for adjusting the chain tension.

6. The rear motor drive mechanism of an off-road motorcycle according to claim 5, characterized in that: The adjusting member includes an adjusting rod and a limiting nut, one end of the adjusting rod is provided with an annular sleeve sleeved on the wheel axle, the lower ends of the left rear fork and the right rear fork are respectively provided with baffles perpendicular to the left rear fork and the right rear fork and extending outward, the baffles are provided with through holes for the adjusting rod to pass through, the end of the adjusting rod away from the annular sleeve passes through the through hole and cooperates with the limiting nut thread to fix the connecting rod.

7. The rear motor drive mechanism of an off-road motorcycle according to claim 1, characterized in that: The mounting seat is provided with a mounting hole for mounting the motor, and one side of the motor output shaft is provided with a mounting hole corresponding to the connecting hole. Bolts pass through the mounting hole and the connecting hole in sequence and cooperate with nuts to fix the motor on the mounting seat.

8. The rear motor drive mechanism of an off-road motorcycle according to claim 4, characterized in that: The left rear fork or the right rear fork is detachably provided with a protective cover for covering the chain.

9. The rear motor drive mechanism of an off-road motorcycle according to claim 8, characterized in that: The protective cover is provided with a first fixing hole for connection, and the left rear fork or the right rear fork has second fixing holes on both sides that match the first fixing holes. The bolts pass through the first fixing holes and the second fixing holes and match with nuts to fix the protective cover on the left rear fork or the right rear fork.

10. The rear motor drive mechanism of an off-road motorcycle according to claim 1, characterized in that: The left rear fork or the right rear fork is provided with a fixed seat, and a connecting arm is rotatably connected to the fixed seat via a connecting shaft. A tensioning wheel for tensioning the chain is rotatably provided on the connecting arm, and a torsion spring is sleeved on the connecting shaft, one free end of the torsion spring rests on the fixed seat, and the other free end rests on the connecting arm, and the connecting arm is always subjected to the outward elastic force of the torsion spring.

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