A new power transmission structure suitable for all-terrain karts

Abstract

The invention discloses a new power transmission structure suitable for an all-terrain kart, comprising a sprocket support frame, an upper bearing seat of the sprocket support frame is provided on the upper part of the sprocket support frame, and a lower bearing seat of the support frame is provided on the lower part of the sprocket support frame. The engine terminal output shaft of the engine is connected to the upper bearing seat of the support frame through an adapted coupling and a bearing, a sprocket and a chain mechanism are installed on the engine terminal output shaft, and the sprocket of the sprocket and the chain mechanism is installed on the sprocket bearing seat. Compared with the prior art, the advantages of the present invention are: the overall structure is simple and practical, the power output by the engine is efficiently transmitted to the rear drive axle, so that the vehicle can better adapt to driving on off-road roads, and the engine can be installed on the frame and separated from the drive axle, which reduces the unsprung mass, improves the comfort of the driver and passengers, greatly improves the power transmission efficiency of the kart, reduces the large amount of initial cost investment and later maintenance costs, has good applicability, and is easy to promote.

Description

Technical Field

[0001] The invention relates to a kart structure, in particular to a new power transmission structure suitable for an all-terrain kart. Background Art

[0002] Now all karts and all-terrain vehicles install the engine and rear suspension as an integral rear drive axle, but this driving mode cannot better adapt to off-road, and it also cannot take into account the comfort of the driver and passengers. The reason for this is that the above-mentioned vehicles are short in size, so the installation position of the engine is greatly limited. Most models design the engine and the rear suspension drive axle into an integral structure, that is, the rear suspension swing arm is a rigid structure, the drive axle is installed under the swing arm, and the engine is installed on the swing arm. The engine and the rear suspension swing arm drive axle are installed and fixed into a rigid single swing arm structure, so that the chain can be effectively used to transmit the power from the engine to the rear drive axle, and the shock absorber spring can be effectively used. However, the disadvantage of this design is that since the rear suspension swing arm is an integral rigid structure, the unsprung mass is greatly increased, the responsiveness of the suspension on undulating roads is reduced, and the impact force from the road surface cannot be effectively reduced. Since the rear suspension swing arm is an integral rigid structure, it cannot form a cross-axis working condition with the front axle. When the vehicle is driving on an off-road road, the tracking performance of each wheel is poor, and it cannot be driven close to the road surface in real time, which reduces the power transmission efficiency.

[0003] Therefore, it is imperative to design a new power transmission structure suitable for all-terrain karts. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the existing kart structure has low power transmission efficiency due to its structural design deficiencies, which increases the initial investment cost and maintenance cost and does not meet current needs.

[0005] In order to solve the above technical problems, the technical solution provided by the present invention is as follows: a new power transmission structure suitable for an all-terrain kart, comprising a sprocket support frame, an upper bearing seat of the sprocket support frame is provided on the upper part of the sprocket support frame, and a lower bearing seat of the support frame is provided on the lower part, the engine terminal output shaft of the engine is connected to the upper bearing seat of the support frame through an adapted coupling and a bearing, a sprocket and a chain mechanism 1 are installed on the engine terminal output shaft, the sprocket of the sprocket and the chain mechanism 1 is installed on the sprocket bearing seat, and a triangular support seat fixed by bolts is provided at the lower part of the sprocket bearing seat;

[0006] One end of the bearing seat under the support frame is connected to the transmission shaft through a universal joint, and a telescopic spline is installed in the middle of the transmission shaft. The telescopic spline is connected to the spline shaft in the bearing seat under the support frame through the universal joint to achieve connection and fixation; the other end of the transmission shaft is connected to the rear drive axle sprocket bearing seat through the same universal joint, and the rear drive axle sprocket bearing seat is connected to the rear drive axle through the sprocket support frame 2, and the rear drive axle sprocket bearing seat is connected to the sprocket and chain mechanism 2.

[0007] The advantages of the present invention over the prior art are: (1) the engine and the drive axle are installed separately, and the engine can be installed on the vehicle frame, which reduces the unsprung mass of the drive axle and improves the rebound responsiveness of the drive axle and the comfort of the driver and passengers;

[0008] (2) The drive axle and the frame are flexibly connected by a parallel four-link and a Panhard link. The drive axle can rise and fall, and can also form a cross-axis working condition with the front axle. The above structure, combined with the structure of the device, makes each wheel fit the road better, while ensuring that the power of the engine is smoothly transmitted to the road;

[0009] (3) This structure can be combined with an integrated through-frame structure to make the entire vehicle more beautiful;

[0010] The overall structure is simple and practical, and the power output by the engine is efficiently transmitted to the rear drive axle, so that the vehicle can better adapt to off-road driving. The engine can also be installed on the frame and separated from the drive axle, which reduces the unsprung mass, improves the comfort of the driver and passengers, greatly improves the power transmission efficiency of the kart, reduces a large amount of initial cost investment and subsequent maintenance costs, has good applicability, and is easy to promote.

[0011] As an improvement, the sprocket support frame has a suitable length, and the bearing seat on the support frame at its upper end is installed on the output shaft at the end of the engine and fastened with a nut.

[0012] As an improvement, a chain tensioner is installed in the middle of the sprocket support frame and the sprocket support frame is kept in a vertical position and can also be adjusted to a suitable power transmission position. The bearing seat under the support frame is welded to the sprocket support frame at a right angle and kept parallel to the rear drive axle. The bearing seat under the support frame is installed with bearings, shafts, corresponding sprockets and universal joints and fastened with bolts. Universal joints are welded at both ends of the drive shaft, and a telescopic spline sleeve is provided in the middle of the drive shaft. One end of the drive shaft is connected to the spline shaft in the bearing seat under the support frame through a universal joint, and the other end is also connected to the sprocket bearing seat of the rear drive axle through a universal joint, and the universal joint passes through the bearing seat and the corresponding sprocket is installed at the end.

[0013] As an improvement, the rear drive axle sprocket bearing seat is welded together with the shaft tube of the rear drive axle through the sprocket support frame 2, H-shaped sprocket and chain mechanism 2 in parallel. The rear drive axle sprocket bearing seat maintains a certain installation distance from the rear drive axle, so that when the sprocket at the end of the universal joint and the sprocket on the bridge shaft of the rear drive axle rotate, no interference occurs.

[0014] As an improvement, the rear drive axle is a rigid shaft structure as a whole. The drive rigid shaft is installed in the drive axle tube. Bearings are installed in the bearing seats at both ends of the drive axle tube to fix the drive rigid shaft. There are spline flanges at both ends of the drive rigid shaft to install the wheel hubs. Flanges are welded on both sides of the drive rigid shaft to fix the large sprocket and brake disc.

[0015] As an improvement, corresponding sprocket bearing seats, bearing seat support frames, brake pump fixing brackets, brake pumps, longitudinal push-pull rod seats, transverse push-pull rod seats and spring mounting brackets are installed outside the drive axle tube to control the posture position of the drive axle during movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the composition of a new power transmission structure suitable for all-terrain karts.

[0017] As shown in the figure: 1. Engine, 2. Sprocket bearing seat, 3. Sprocket and chain mechanism 1, 4. Bearing seat on support frame, 5. Engine terminal output shaft, 6. Sprocket support frame 1, 7. Triangular support seat, 8. Rear drive axle, 9. Bearing seat under support frame, 10. Universal joint, 11. Drive shaft, 12. Telescopic spline, 13. Sprocket bearing seat of rear drive axle, 14. Sprocket support frame 2, 15. Sprocket and chain mechanism 2. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0019] The present invention is implemented in detail, and is a novel power transmission structure suitable for an all-terrain kart, comprising a sprocket support frame 6, characterized in that: an upper bearing seat 4 is provided on the upper part of the sprocket support frame 6, and a lower bearing seat 9 is provided on the lower part of the support frame, an engine terminal output shaft 5 of an engine 1 is connected to the upper bearing seat 4 of the support frame through an adapted coupling and a bearing, a sprocket and a chain mechanism 3 are added to the engine terminal output shaft 5, a sprocket of the sprocket and the chain mechanism 3 is added to the sprocket bearing seat 2, and a triangular support seat 7 fixed by bolts is provided at the lower part of the sprocket bearing seat 2;

[0020] One end of the bearing seat 9 under the support frame is connected to the transmission shaft 11 through a universal joint 10, and a telescopic spline 12 is installed in the middle of the transmission shaft 11. The telescopic spline 12 is connected to the spline shaft in the bearing seat 9 under the support frame through the universal joint 10 to achieve connection and fixation; the other end of the transmission shaft 11 is connected to the rear drive axle sprocket bearing seat 13 through the same universal joint 10, and the rear drive axle sprocket bearing seat 13 is connected to the rear drive axle 8 through a sprocket support frame 14, and a sprocket and chain mechanism 15 is connected to the rear drive axle sprocket bearing seat 13.

[0021] The sprocket support frame 6 has a suitable length, and the bearing seat 4 on the support frame at its upper end is installed on the output shaft 5 at the end of the engine and fastened with a nut.

[0022] The middle part of the sprocket support frame 6 is equipped with a chain tensioner and the sprocket support frame 6 is kept in a vertical position and can also be adjusted to a suitable power transmission position. The bearing seat 9 under the support frame is welded to the sprocket support frame 6 into a right angle and kept parallel to the rear drive axle 8. The bearing seat 9 under the support frame is equipped with bearings, shafts, corresponding sprockets and universal joints 10 and fastened with bolts. Universal joints 10 are welded at both ends of the transmission shaft 11, and a telescopic spline sleeve is provided in the middle part of the transmission shaft 11. One end of the transmission shaft 11 is connected to the spline shaft in the bearing seat 9 under the support frame through the universal joint 10, and the other end is also connected to the rear drive axle sprocket bearing seat 13 through the universal joint 10, and the universal joint 10 passes through the bearing seat and the corresponding sprocket is installed at the end.

[0023] The rear drive axle sprocket bearing seat 13 is welded together with the shaft tube of the rear drive axle 8 in parallel through the sprocket support frame 14, the H-shaped sprocket and the chain mechanism 15. The rear drive axle sprocket bearing seat 13 maintains a certain installation distance with the rear drive axle 8, so that when the sprocket at the end of the universal joint 10 and the sprocket on the bridge shaft of the rear drive axle 8 rotate, no interference occurs.

[0024] The rear drive axle 8 is a rigid shaft structure as a whole. The drive rigid shaft is installed in the drive axle tube. Bearings are installed in the bearing seats at both ends of the drive axle tube to fix the drive rigid shaft. There are spline flanges at both ends of the drive rigid shaft to install the wheel hubs. Flanges are welded on both sides of the drive rigid shaft to fix the large sprocket and brake disc.

[0025] The corresponding sprocket bearing seat, bearing seat support frame, brake pump fixing bracket, brake pump, longitudinal push-pull rod seat, transverse push-pull rod seat and spring mounting bracket are respectively installed outside the drive axle tube to control the posture position of the drive axle during movement.

[0026] The working principle of the present invention is as follows: the power output by the terminal shaft of the engine is transmitted to the chain through the sprocket installed thereon, and a bearing in the bearing seat at the upper end of the chain support frame is installed on the terminal transmission shaft at the same time. The function of the entire chain support frame is to maintain the distance between the small sprockets at the upper and lower ends so that the chain can transmit power smoothly. The small sprocket bearing seat on the terminal output shaft is connected to the triangular support welded in the middle of the chain support frame with bolts. The above structure can prevent the upper end bearing of the chain support frame from being damaged during the power transmission process of the chain.

[0027] The chain transmits the driving force to the small sprocket installed on the bearing seat at the lower end of the chain support frame. The small sprocket drives the spline shaft, the universal joint and its transmission shaft to rotate at the same time. The telescopic spline in the middle of the transmission shaft can compensate for the lengthening or shortening of the transmission shaft during the movement of the drive axle, thereby ensuring the normal transmission of power.

[0028] The rotating transmission shaft transmits power to the universal joint and small sprocket installed on the drive axle. The small sprocket drives the chain to transfer power to the large sprocket of the drive axle, thereby driving the drive shaft to rotate and driving the wheels at both ends of the drive axle to rotate synchronously, transmitting power to the ground.

[0029] When the vehicle is traveling on an undulating road, the engine, sprocket support frame and other related components remain in a relatively fixed position with the bracket, and the drive axle performs vertical or cross-axis movements with the vehicle body along the undulating road surface. The transmission shaft telescopic splines and universal joints in the transmission system can compensate for the length and angular variables of the drive shaft being stretched or compressed under various working conditions.

[0030] This structure adopts a rear-mounted engine and rear-axle drive mode. The engine is installed on the rear axle and the upper part of the frame, and the rear drive axle is installed on the lower part of the engine and the frame. The device is installed between the engine and the rear axle, which can effectively transmit the power of the engine to the rear drive axle, and can also meet the requirements of sufficient shock absorbing travel of the rear suspension, greatly alleviate the impact force, and can also meet the working conditions of the cross axis formed by the rear drive axle and the front axle, so that each wheel has good tracking performance.

[0031] The small sprocket is installed on the output shaft at the end of the engine, and a bearing seat is installed on the small sprocket. Bearing seats are welded on both ends of the chain support frame. The chain support seat has a suitable length. The bearing seat at the upper end of the support frame is also installed on the engine output shaft and fastened with a nut.

[0032] A triangular support seat is welded in the middle of the chain support frame, and the bearing seat installed on the engine output shaft sprocket is fastened with a nut. A chain tensioner is installed in the middle of the sprocket support frame and the support frame remains in a vertical position, and can also be adjusted to a suitable power transmission. The bearing seat at the lower end of the chain support frame is welded to the support frame at a right angle and remains parallel to the rear drive axle. The bearing seat at the lower end of the support frame is installed with bearings, shafts, small sprockets and universal joints and fastened with bolts. Universal joints are welded at both ends of the drive shaft, and a telescopic spline sleeve is provided in the middle. One end of the drive shaft is connected to the spline shaft in the bearing seat at the lower end of the chain support frame through a universal joint, and the other end is also connected to the small sprocket bearing seat on the drive rear axle through a universal joint, and the universal joint shaft passes through the bearing seat and a small sprocket is installed at the end.

[0033] The small sprocket bearing seat on the drive axle is welded together with the drive shaft bridge shaft tube through the H-type sprocket, support frame and parallel. At the same time, the welded small sprocket bearing seat and the drive axle should maintain a certain distance, so that the small sprocket installed at the end of the universal joint shaft and the large sprocket installed on the drive axle shaft will not interfere with each other when rotating.

[0034] The drive axle matched with this device has an overall hard shaft structure. The drive axle has no inter-axle differential. The advantages are large bearing capacity, fewer moving parts and long service life. The structural characteristics are that the drive hard shaft is installed in the drive axle tube, and bearings are installed in the bearing seats at both ends of the drive axle tube to fix the drive hard shaft. There are spline flanges at both ends of the drive hard shaft to install the wheel hub, and flanges are welded on both sides of the drive hard shaft to fix the large sprocket and brake disc.

[0035] A small sprocket bearing seat, a bearing seat support frame, a brake pump fixing bracket, a brake pump, a longitudinal push-pull rod seat, a transverse push-pull rod seat and a spring mounting bracket are installed outside the drive axle tube to control the posture position of the drive axle during movement.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features, and in the description of the present invention, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0037] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0040] Without departing from the concept of the present invention, any obvious modifications and improvements should fall within the protection scope of the present invention.

Claims

1. A novel power transmission structure suitable for an all-terrain kart, comprising a sprocket support frame (6), characterized in that: The sprocket support frame (6) is provided with an upper support frame bearing seat (4) at the top and a lower support frame bearing seat (9) at the bottom. The upper support frame bearing seat (4) is connected to the engine terminal output shaft (5) of the engine (1) via an adapted coupling and a bearing. The engine terminal output shaft (5) is provided with a sprocket and chain mechanism (3). The sprocket of the sprocket and chain mechanism (3) is installed on the sprocket bearing seat (2). The lower part of the sprocket bearing seat (2) is provided with a triangular support seat (7) fixed by bolts. One end of the bearing seat (9) under the support frame is connected to a transmission shaft (11) through a universal joint (10), and a telescopic spline (12) is installed in the middle of the transmission shaft (11). The telescopic spline (12) is connected to the spline shaft in the bearing seat (9) under the support frame through the universal joint (10) to achieve connection and fixation; the other end of the transmission shaft (11) is connected to a rear drive axle sprocket bearing seat (13) through the same universal joint (10), and the rear drive axle sprocket bearing seat (13) is connected to the rear drive axle (8) through a sprocket support frame (14), and a sprocket and chain mechanism (15) is connected to the rear drive axle sprocket bearing seat (13).

2. A new power transmission structure suitable for an all-terrain kart according to claim 1, characterized in that: The sprocket support frame 1 (6) has a suitable length, and the bearing seat (4) on the upper end of the support frame is installed on the output shaft (5) at the end of the engine and fastened with a nut.

3. A new power transmission structure suitable for an all-terrain kart according to claim 1, characterized in that: The middle part of the sprocket support frame (6) is equipped with a chain tensioner and the sprocket support frame (6) is kept in a vertical position. The lower bearing seat (9) of the support frame is welded to the sprocket support frame (6) to form a right angle and keep parallel with the rear drive axle (8). The lower bearing seat (9) of the support frame is equipped with a bearing, a shaft, a corresponding sprocket and a universal joint (10) and is fastened with bolts. Universal joints (10) are welded at both ends of the transmission shaft (11). A telescopic spline sleeve is provided in the middle part of the transmission shaft (11). One end of the transmission shaft (11) is connected to the spline shaft in the lower bearing seat (9) of the support frame through the universal joint (10), and the other end is also connected to the rear drive axle sprocket bearing seat (13) through the universal joint (10), and the universal joint (10) passes through the bearing seat and the corresponding sprocket is installed at the end.

4. A new power transmission structure suitable for an all-terrain kart according to claim 1, characterized in that: The rear drive axle sprocket bearing seat (13) is welded together with the shaft tube of the rear drive axle (8) in parallel through the second sprocket support frame (14), the H-shaped sprocket and the second chain mechanism (15). The rear drive axle sprocket bearing seat (13) and the rear drive axle (8) maintain a certain installation distance, so that when the sprocket at the end of the universal joint (10) and the sprocket on the bridge shaft of the rear drive axle (8) rotate, no interference occurs.

5. The novel power transmission structure suitable for an all-terrain kart according to claim 1, characterized in that: The rear drive axle (8) is a hard shaft structure as a whole. The drive hard shaft is installed in the drive axle tube. Bearings are installed in the bearing seats at both ends of the drive axle tube to fix the drive hard shaft. There are spline flanges at both ends of the drive hard shaft to install the wheel hub. Flanges are welded on both sides of the drive hard shaft to fix the large sprocket and the brake disc.

6. A new power transmission structure suitable for an all-terrain kart according to claim 5, characterized in that: The corresponding sprocket bearing seat, bearing seat support frame, brake pump fixing bracket, brake pump, longitudinal push-pull rod seat, transverse push-pull rod seat and spring mounting bracket are respectively installed outside the drive axle tube to control the posture position of the drive axle during movement.

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