Steering switching device and kart

Abstract

The present invention belongs to the field of vehicle technology, and discloses a steering switching device and a kart. The steering switching device includes: a frame; a driving mechanism, which is arranged on the frame; a middle wheel transmission mechanism, which is rotatably connected to the driving mechanism and the frame respectively; a front middle wheel, which is rotatably connected to the middle wheel transmission mechanism, the driving mechanism can drive the front middle wheel to rotate through the middle wheel transmission mechanism, and the front middle wheel can slide relative to the middle wheel transmission mechanism, so that the front middle wheel selectively contacts the ground; a front wheel transmission mechanism, which is rotatably connected to the driving mechanism and the frame respectively; a front wheel mechanism, the driving mechanism can drive the front wheel mechanism to rotate through the front wheel transmission mechanism, and the front wheel mechanism can be detachably connected to the front wheel transmission mechanism, so that the front wheel mechanism selectively contacts the ground; a rear wheel mechanism, which is arranged on both sides of the rear end of the frame and can be fixedly connected to the frame relative to the frame. The steering switching device can switch between four-wheel and three-wheel states to meet the needs of entertainment and practicality.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a steering switching device and a kart. Background Art

[0002] Vehicles play an important role in daily life and entertainment. Karts have become the most popular car among children, especially boys. With the progress of society, the requirements for karts are gradually increasing. According to relevant laws and regulations, four-wheeled karts are not allowed to be on the road, which makes it impossible for four-wheeled karts to be legally on the road. They can only be driven on special venues, which cannot meet the needs of practicality and entertainment at the same time and cannot solve the problem of dual-purpose karts. Summary of the invention

[0003] The purpose of the present invention is to provide a steering switching device and a kart, which are used to take into account both the practicality of control and the entertainment of the kart, so as to solve the problem of dual use of one car.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] A steering switching device, comprising:

[0006] Frame;

[0007] A driving mechanism, which is arranged on the frame;

[0008] A middle wheel transmission mechanism, which is rotatably connected to the driving mechanism and the frame respectively;

[0009] A front middle wheel, which is rotatably connected to the middle wheel transmission mechanism, the driving mechanism can drive the front middle wheel to rotate through the middle wheel transmission mechanism, and the front middle wheel is configured to be able to slide relative to the middle wheel transmission mechanism so that the front middle wheel selectively contacts the ground;

[0010] A front wheel transmission mechanism, which is rotatably connected to the driving mechanism and the frame respectively;

[0011] A front wheel mechanism, which is located on both sides of the front end of the frame, the driving mechanism can drive the front wheel mechanism to rotate through the front wheel transmission mechanism, and the front wheel mechanism is configured to be detachably connected to the front wheel transmission mechanism and can move in a direction close to or away from the frame, so that the front wheel mechanism selectively contacts the ground;

[0012] The rear wheel mechanism is arranged on both sides of the rear end of the frame and can be fixedly connected with the frame.

[0013] Preferably, the driving mechanism includes a driving source, an input shaft, an output shaft and a gear assembly, the input shaft is connected to the output shaft through the gear assembly, one end of the input shaft is connected to the output end of the driving source, and the other end is rotatably connected to the middle wheel transmission mechanism, and the output end of the output shaft is connected to the front wheel transmission mechanism.

[0014] Preferably, the gear assembly comprises:

[0015] An input gear sleeved on the input shaft;

[0016] A driving gear meshed with the input gear;

[0017] A driven gear, which is coaxially arranged with the driving gear;

[0018] The output gear is meshed with the driven gear, and the output shaft passes through the output gear.

[0019] Preferably, the middle wheel transmission mechanism comprises a first universal joint and a frame, the frame is rotationally connected to the driving mechanism via the first universal joint, the frame is rotationally connected to the vehicle frame, and the front middle wheel is slidably arranged on the frame.

[0020] Preferably, a slide groove is provided on the frame, and the connecting shaft of the front middle wheel is passed through the slide groove and slidably arranged with the slide groove.

[0021] Preferably, the cross-section of the slide groove is a C-shaped structure, and the opening of the slide groove is arranged toward or away from the rear wheel mechanism.

[0022] Preferably, the front wheel transmission mechanism includes a second universal joint, a transmission shaft, a connecting rod assembly, a turntable and a hub connecting assembly, one end of the transmission shaft is rotatably connected to the driving mechanism via the second universal joint, and the other end is rotatably connected to the connecting rod assembly via the turntable, the hub connecting assembly is detachably connected to the front wheel mechanism, and the hub connecting assembly is respectively rotatably connected to the connecting rod assembly and the frame for deflection of the front wheel mechanism.

[0023] Preferably, the axis of the front wheel mechanism and the axis of the wheel hub connecting assembly are colinear, or the axis of the front wheel mechanism is located above the axis of the wheel hub connecting assembly.

[0024] Preferably, the front wheel transmission mechanism further comprises a thimble, and the thimble is sleeved on the transmission shaft and connected to the turntable.

[0025] To achieve the above object, the present invention further provides a go-kart, comprising the above steering switching device.

[0026] Beneficial effects of the invention:

[0027] The steering switching device provided by the present invention, when the four-wheel mode is needed, slides the front middle wheel relative to the middle wheel transmission mechanism, so that the front middle wheel is separated from the ground and does not contact the ground, and the front wheel mechanism moves in the direction close to the frame, so that the front wheel mechanism contacts the ground, and the driving mechanism drives the front wheel mechanism to rotate through the front wheel transmission mechanism, and drives the rear wheel mechanism to rotate relative to the frame. Since the front middle wheel is suspended and does not participate in steering, the steering switching device realizes the four-wheel state at this time;

[0028] When the three-wheel mode is needed, the front middle wheel is slid relative to the middle wheel transmission mechanism so that the front middle wheel is close to the ground and in contact with the ground, and the front wheel mechanism moves away from the frame so that the front wheel mechanism is not in contact with the ground. The driving mechanism drives the front middle wheel to rotate through the middle wheel transmission mechanism, and the rear wheel mechanism can be fixedly connected with the frame. Since the front wheel mechanism is suspended and does not participate in steering, the steering switching device realizes the three-wheel state at this time.

[0029] The steering switching device realizes the folding and lowering of the front middle wheel by arranging the front middle wheel to slide relative to the middle wheel transmission mechanism, and realizes the folding and lowering of the front wheel mechanism by arranging the front wheel mechanism to be detachably connected to the front wheel transmission mechanism. It can freely switch between the four-wheel state and the three-wheel state. In the four-wheel state, it meets the entertainment needs, and in the three-wheel state, it can be on the road and meets the operability needs, thereby solving the problem of the existing two-purpose vehicle.

[0030] The present invention also provides a go-kart, comprising the above-mentioned steering switching device, so that the go-kart can be switched between a three-wheel mode and a four-wheel mode, while meeting the requirements of practicality and entertainment. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the steering switching device of the present invention;

[0032] Figure 2 is a schematic structural diagram of a gear assembly of a steering switching device of the present invention;

[0033] Figure 3 It is a schematic diagram of the states of the middle wheel transmission mechanism and the front wheel transmission mechanism of the steering switching device of the present invention in the four-wheel mode;

[0034] Figure 4 is a schematic diagram of the state of the front middle wheel of the steering switching device of the present invention in the three-wheel mode;

[0035] Figure 5 Schematic diagram of the state of the front middle wheel of the steering switching device of the present invention in the four-wheel mode;

[0036] Figure 6It is a schematic diagram of the states of the middle wheel transmission mechanism and the front wheel transmission mechanism of the steering switching device of the present invention in the three-wheel mode;

[0037] Figure 7 is a schematic diagram of the state of the left front wheel of the steering switching device of the present invention in the four-wheel mode;

[0038] Figure 8 It is a schematic diagram of the state of the left front wheel and the left wheel hub connector of the steering switching device of the present invention in the four-wheel mode;

[0039] Fig. 9 is a schematic diagram of the state of the left front wheel of the steering switching device of the present invention in the three-wheel mode;

[0040] Fig.10 It is a schematic diagram of the state of the left front wheel and the left hub connector of the steering switching device of the present invention in the three-wheel mode.

[0041] In the figure:

[0042] 1. Frame; 2. Driving mechanism; 3. Middle wheel transmission mechanism; 4. Front middle wheel; 5. Front wheel transmission mechanism; 6. Front wheel mechanism; 7. Rear wheel mechanism; 8. First middle latch; 9. First left latch; 10. Second left latch; 11. Second middle latch; 12. First right latch; 13. Second right latch; 14. First rear latch; 15. Second rear latch;

[0043] 21. Input shaft; 22. Output shaft; 23. Gear assembly; 24. Box;

[0044] 231, input gear; 232, driving gear; 233, driven gear; 234, output gear; 235, intermediate shaft;

[0045] 31. first universal joint; 32. frame; 321. slideway;

[0046] 41. Connecting shaft;

[0047] 51. Second universal joint; 52. Transmission shaft; 53. Connecting rod assembly; 54. Turntable; 55. Hub connection assembly; 56. Ejector pin;

[0048] 531, left connecting rod; 532, right connecting rod; 551, left wheel hub connecting piece; 552, right wheel hub connecting piece; 5511, first fixing hole; 5512, second fixing hole; 5513, third fixing hole;

[0049] 61, left front wheel; 62, right front wheel; 611, first connecting hole; 612, second connecting hole; 613, third connecting hole;

[0050] 71. Left rear wheel; 72. Right rear wheel. DETAILED DESCRIPTION

[0051] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0052] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] 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 below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0054] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0055] This embodiment provides a steering switching device, which is applicable to the field of karts. Figure 1As shown, the steering switching device includes a frame 1, a driving mechanism 2, a middle wheel transmission mechanism 3, a front middle wheel 4, a front wheel transmission mechanism 5, a front wheel mechanism 6 and a rear wheel mechanism 7. The frame 1 is a frame structure, and the frame 1 plays the role of overall support. The frame 1 is provided with a driving mechanism 2, and the driving mechanism 2 is externally connected to a steering wheel. It should be particularly noted that the driving mechanism 2 is used as a steering power source for the kart and is used for steering the kart. The rear wheel mechanism 7 is externally connected to a motor and is a driving power source. A middle wheel transmission mechanism 3 is provided between the driving mechanism 2 and the front middle wheel 4. The middle wheel transmission mechanism 3 is respectively connected to the driving mechanism 2 and the frame 1 in rotation, and the middle wheel transmission mechanism 3 plays the role of intermediate transmission. The front middle wheel 4 is located between the front wheel mechanism 6 and is connected to the middle wheel transmission mechanism 3 in rotation. The driving mechanism 2 can drive the front middle wheel 4 to rotate through the middle wheel transmission mechanism 3, and the front middle wheel 4 is configured to be able to slide relative to the middle wheel transmission mechanism 3, so that the front middle wheel 4 selectively contacts the ground.

[0056] The front wheel transmission mechanism 5 is located between the driving mechanism 2 and the front wheel mechanism 6. The front wheel mechanism 6 is located on both sides of the front end of the frame 1. The front wheel transmission mechanism 5 is rotatably connected to the driving mechanism 2 and the frame 1 respectively. The driving mechanism 2 can drive the front wheel mechanism 6 to rotate through the front wheel transmission mechanism 5. The front wheel mechanism 6 is configured to be detachably connected to the front wheel transmission mechanism 5 and can move in a direction close to or away from the frame 1, so that the front wheel mechanism 6 selectively contacts the ground. The rear wheel mechanism 7 is arranged on both sides of the rear end of the frame 1 and can be fixedly connected to the frame 1 relative to the frame 1.

[0057] It is understandable that if Figure 1 As shown, the front wheel mechanism 6 includes a left front wheel 61 and a right front wheel 62, and the rear wheel mechanism 7 includes a left rear wheel 71 and a right rear wheel 72. Among them, the left and right directions are only relative to the front direction of the kart, and the left and right only indicate directions and have no substantial meaning. The left rear wheel 71 is fixedly connected to the frame 1 through the first rear latch 14 or bolts, and the right rear wheel 72 is fixedly connected to the frame 1 through the second rear latch 15 or bolts, and the left rear wheel 71 and the right rear wheel 72 play a role of fixed connection. It should be particularly noted that the rear wheel mechanism 7 is not completely fixed, but actually has a suspension system. The rear wheel mechanism 7 is also fixedly connected to the suspension, and the suspension is fixedly connected to the frame 1. In this way, the rear wheel mechanism 7 has a tendency to jump up and down relative to the frame 1 through the spring of the suspension, but it does not rotate or turn, which is not reflected in the suspension diagram. Therefore, if the suspension is deleted, the rear wheel mechanism 7 is fixedly connected to the frame 1, but the rear wheel mechanism 7 is driven by the motor to rotate relative to the transmission shaft, and the two are not contradictory.

[0058] The steering switching device provided in this embodiment, when the four-wheel mode is required, the front middle wheel 4 is slid relative to the middle wheel transmission mechanism 3, so that the front middle wheel 4 is separated from the ground and does not contact the ground, the front wheel mechanism 6 moves in the direction close to the frame 1, so that the front wheel mechanism 6 contacts the ground, the driving mechanism 2 drives the front wheel mechanism 6 to rotate through the front wheel transmission mechanism 5, and the rear wheel mechanism 7 is fixedly connected with the frame 1. Since the front middle wheel 4 is suspended relative to the ground and does not participate in steering, the steering switching device realizes the four-wheel state at this time;

[0059] When the three-wheel mode is needed, the front middle wheel 4 is slid relative to the middle wheel transmission mechanism 3 so that the front middle wheel 4 is close to the ground and in contact with the ground, and the front wheel mechanism 6 moves in the direction away from the frame 1 so that the front wheel mechanism 6 is not in contact with the ground. The driving mechanism 2 drives the front middle wheel 4 to rotate through the middle wheel transmission mechanism 3, and drives the rear wheel mechanism 7 to rotate relative to the frame 1. Since the front wheel mechanism 6 is suspended relative to the ground and does not participate in steering, the steering switching device realizes the three-wheel state at this time.

[0060] The steering switching device, by arranging the front middle wheel 4 to be able to slide relative to the middle wheel transmission mechanism 3, realizes the folding and lowering of the front middle wheel 4, and by arranging the front wheel mechanism 6 to be detachably connected to the front wheel transmission mechanism 5, realizes the folding and lowering of the front wheel mechanism 6. It can freely switch between the four-wheel state and the three-wheel state. In the four-wheel state, it meets the entertainment needs, and in the three-wheel state, it can be on the road and meets the operability needs, thereby solving the problem of the existing two-purpose vehicle.

[0061] Furthermore, if Figure 2 As shown, the driving mechanism 2 includes a driving source, an input shaft 21, an output shaft 22, a gear assembly 23 and a box body 24. The box body 24 is a hollow structure. The box body 24 includes an upper box body and a lower box body. The upper box body and the lower box body are both open structures at one end. The opening of the upper box body and the opening of the lower box body are arranged opposite to each other. The upper box body and the lower box body are closed and fixedly connected to form a accommodating space therein. The gear assembly 23 is arranged inside the accommodating space. The box body 24 plays a role of accommodation. The input shaft 21 and the output shaft 22 are penetrated by the box body 24, and the box body 24 plays a role of support.

[0062] The driving source is specifically a motor, one end of the input shaft 21 is connected to the output end of the driving source, and the other end is rotatably connected to the middle wheel transmission mechanism 3, and the input shaft 21 is used to drive the rotation of the middle wheel transmission mechanism 3. The input shaft 21 is connected to the output shaft 22 through the gear assembly 23, and the output end of the output shaft 22 is connected to the front wheel transmission mechanism 5. Using the transmission effect of the gear assembly 23, the output shaft 22 is used to drive the rotation of the front wheel transmission mechanism 5.

[0063] Specifically, the gear assembly 23 includes an input gear 231, a driving gear 232, a driven gear 233, an output gear 234 and an intermediate shaft 235. The input gear 231 is sleeved on the input shaft 21, and the driving gear 232 is meshed with the input gear 231. The intermediate shaft 235 is penetrated through the housing 24 and is rotatably arranged relative thereto. The intermediate shaft 235 is respectively penetrated through the driving gear 232 and the driven gear 233, so that the driving gear 232 and the driven gear 233 are coaxially arranged. The output gear 234 is meshed with the driven gear 233, and the output shaft 22 is penetrated through the output gear 234. The driving source drives the input gear 231 to transmit through the input shaft 21, and drives the driving gear 232 meshed with the input gear 231 to rotate. With the rotation of the driving gear 232, the driven gear 233 coaxially arranged with the driving gear 232 rotates at the same time, and in turn drives the output gear 234 to rotate, so that the output shaft 22 is used to output torque to the front wheel mechanism 6.

[0064] like Figure 2 As shown, for the driving mechanism 2, the power input end is the end where the input shaft 21 is connected to the driving source, and the power output end is specifically divided into two power output ends, a first power output end and a second power output end. The first power output end is the end where the input shaft 21 is connected away from the driving source, and the second power output end is the output end of the output shaft 22.

[0065] like Figure 3 As shown, the first power output end drives the rotation of the front middle wheel 4 through the middle wheel transmission mechanism 3. Specifically, the middle wheel transmission mechanism 3 includes a first universal joint 31 and a frame 32. The first universal joint 31 is located between the input shaft 21 and the frame 32. One end of the first universal joint 31 is rotatably connected to the input shaft 21, and the other end is rotatably connected to the frame 32, so that the frame 32 is rotatably connected to the driving mechanism 2 through the first universal joint 31. The frame 32 is rotatably connected to the frame 1. The frame 32 is preferably hinged on the frame 1, and the front middle wheel 4 is slidably arranged on the frame 32. The sliding arrangement between the frame 32 and the front middle wheel 4 is used to adjust the position of the front middle wheel 4. By setting the first universal joint 31 and the frame 32, the rotation effect between the input shaft 21 and the frame 32 and between the frame 32 and the frame 1 is guaranteed, so that the front middle wheel 4 can rotate freely, so as to achieve the purpose of deflecting the front middle wheel 4 for steering.

[0066] Furthermore, if Figure 4-Figure 5As shown, the frame 32 is specifically a door-shaped structure, and the material of the frame 32 is preferably nylon. Slide grooves 321 are respectively provided on both sides of the frame 32, and connecting shafts 41 are provided on both sides of the front middle wheel 4. The connecting shaft 41 is inserted into the slide groove 321 and slidably arranged with the slide groove 321. The position adjustment of the front middle wheel 4 is achieved by sliding cooperation between the connecting shaft 41 and the slide groove 321. Specifically, the cross section of the slide groove 321 is a C-shaped structure, and the opening of the slide groove 321 is set toward or away from the rear wheel mechanism 7. By setting the cross section of the slide groove 321 to be a C-shaped structure, the two ends of the slide groove 321 are close to each other and are set in a closed state, which plays a role in limiting the connecting shaft 41 and preventing the connecting shaft 41 from falling out of the slide groove 321.

[0067] When the connecting shaft 41 is in the Figure 4 When the connecting shaft 41 is in the position shown in the figure, it is located at the bottom end of the slide groove 321. At this time, the distance between the front middle wheel 4 and the frame 1 is relatively far, and the front middle wheel 4 is in contact with the ground. The front middle wheel 4 and the ground are in rolling contact, which is the working state. At this time, the kart is in a three-wheel mode. When the connecting shaft 41 slides along the inner wall of the slide groove 321 and slides to the position shown in the figure, the connecting shaft 41 is located at the bottom end of the slide groove 321. At this time, the distance between the front middle wheel 4 and the frame 1 is relatively far, and the front middle wheel 4 is in contact with the ground. The front middle wheel 4 and the ground are in rolling contact, which is the working state. Figure 5 In the position shown, the distance between the front middle wheel 4 and the frame 1 is relatively close, the front middle wheel 4 is not in contact with the ground, and the front middle wheel 4 is suspended relative to the ground. At this time, the kart is in a four-wheel mode.

[0068] like Figure 3 As shown, since the second power output end is the output end of the output shaft 22, the second power output end drives the front wheel mechanism 6 to rotate through the front wheel transmission mechanism 5. Specifically, the front wheel transmission mechanism 5 includes a second universal joint 51, a transmission shaft 52, a connecting rod assembly 53, a rotating disk 54 and a wheel hub connection assembly 55 (such as Figure 1 As shown in FIG. 1 , the second universal joint 51 is located between the output shaft 22 and the transmission shaft 52. One end of the second universal joint 51 is rotationally connected to the output shaft 22, and the other end is rotationally connected to the transmission shaft 52, so that one end of the transmission shaft 52 is rotationally connected to the driving mechanism 2 through the second universal joint 51, so that the torque of the output shaft 22 in the driving mechanism 2 is transmitted to the transmission shaft 52 through the second universal joint 51. The other end of the transmission shaft 52 is rotationally connected to the connecting rod assembly 53 through the rotating disk 54. Under the cooperation of the transmission shaft 52 and the rotating disk 54, the rotation of the transmission shaft 52 is converted into the deflection of the rotating disk 54. With the rotation of the rotating disk 54, the movement of the connecting rod assembly 53 is driven. The wheel hub connecting assembly 55 is rotationally connected to the connecting rod assembly 53 and the frame 1 respectively, and is used for the deflection of the front wheel mechanism 6. The movement of the connecting rod assembly 53 drives the wheel hub connecting assembly 55 to rotate relative to the frame 1, so that the front wheel mechanism 6 can rotate freely, so as to achieve the purpose of deflecting the front wheel mechanism 6 for steering.

[0069] Preferably, the front wheel transmission mechanism 5 further comprises an ejector pin 56, which is sleeved on the transmission shaft 52 and connected to the turntable 54. By providing the ejector pin 56, the rotation of the transmission shaft 52 approximately in the vertical direction is converted into the deflection of the turntable 54 approximately in the horizontal direction.

[0070] It can be understood that the connecting rod assembly 53 includes a left connecting rod 531 and a right connecting rod 532, and the wheel hub connecting assembly 55 includes a left wheel hub connecting member 551 and a right wheel hub connecting member 552. One end of the left connecting rod 531 is rotatably connected to the turntable 54 through the first intermediate latch 8, and the other end of the left connecting rod 531 is rotatably connected to the left wheel hub connecting member 551 through the first left latch 9. The left wheel hub connecting member 551 is rotatably connected to the frame 1 through the second left latch 10, so that the left wheel hub connecting member 551 can rotate around the frame 1. The left wheel hub connecting member 551 and the left front wheel 61 are connected in a screw connection.

[0071] The connection mode of the left front wheel 61 and the right front wheel 62 is bilaterally symmetrical. Specifically, one end of the right connecting rod 532 is rotatably connected to the turntable 54 through the second middle latch 11, and the other end of the right connecting rod 532 is rotatably connected to the right wheel hub connector 552 (such as the right wheel hub connector 552) through the first right latch 12. Figure 1 As shown in FIG. 1 , the right wheel hub connector 552 is rotatably connected to the vehicle frame 1 through the second right latch 13, so that the right wheel hub connector 552 can rotate around the vehicle frame 1. The right wheel hub connector 552 and the right front wheel 62 are connected in a screw connection.

[0072] The turntable 54 is hinged to the left connecting rod 531 through the first middle latch 8. The rotation of the turntable 54 drives the displacement of the left connecting rod 531. The left connecting rod 531 is hinged to the left hub connector 551 through the first left latch 9. The displacement of the left connecting rod 531 allows the left hub connector 551 to rotate around the axis of the first left latch 9. The left hub connector 551 is hinged to the frame 1 through the second left latch 10, so that the left hub connector 551 can rotate around the axis of the second left latch 10. Under the joint restriction of the first left latch 9 and the second left latch 10, the left front wheel 61 set on the left hub connector 551 can achieve deflection. Since the connection mode of the left front wheel 61 and the right front wheel 62 is bilaterally symmetrical, the entire kart is now driven by the right front wheel 62, the left front wheel 61, the left rear wheel 71 and the right rear wheel 72 to perform four-wheel drive steering.

[0073] like Figure 6As shown, in order to switch between the four-wheel and three-wheel modes, the wheel hub connection assembly 55 can be detachably connected to the front wheel mechanism 6 to adjust the position of the front wheel mechanism 6 relative to the frame 1. The axis of the front wheel mechanism 6 and the axis of the wheel hub connection assembly 55 are collinear, or the axis of the front wheel mechanism 6 is located above the axis of the wheel hub connection assembly 55. When the axis of the front wheel mechanism 6 and the axis of the wheel hub connection assembly 55 are collinear, the front wheel mechanism 6 can directly contact the ground and is in the four-wheel mode; when the axis of the front wheel mechanism 6 is located above the axis of the wheel hub connection assembly 55, the front wheel mechanism 6 does not contact the ground, and the front wheel mechanism 6 is suspended relative to the ground and is in the three-wheel mode.

[0074] Specifically, Figure 7-Figure 8 As shown, the left front wheel 61 is provided with a first connection hole 611, a second connection hole 612 and a third connection hole 613, and the left hub connector 551 is provided with a first fixing hole 5511, a second fixing hole 5512 and a third fixing hole 5513. The first connection hole 611, the second connection hole 612 and the third connection hole 613 are arranged to correspond to the first fixing hole 5511, the second fixing hole 5512 and the third fixing hole 5513 one by one and are fixed by bolts, as shown in FIG. Figure 8 As shown, at this time, the axis of the front wheel mechanism 6 and the axis of the wheel hub connecting assembly 55 are collinear.

[0075] like Fig. 9 As shown, the left front wheel 61 is rotated around the axis of the first connecting hole 611, so that the second connecting hole 612 on the left front wheel 61 corresponds to the third fixing hole 5513 on the left wheel hub connector 551, as shown in FIG. Fig.10 As shown, the first connecting hole 611 on the left front wheel 61 corresponds to the first fixing hole 5511 on the left hub connector 551 and is fixed by bolts, the second connecting hole 612 on the left front wheel 61 corresponds to the third fixing hole 5513 on the left hub connector 551 and is fixed by bolts, and the connection method of the left front wheel 61 and the right front wheel 62 is symmetrical on the left and right. At this time, the axis of the front wheel mechanism 6 is located above the axis of the hub connecting assembly 55, and the left front wheel 61 and the right front wheel 62 are suspended and do not contact the ground.

[0076] A first connecting hole 611, a second connecting hole 612 and a third connecting hole 613 are provided on the left front wheel 61, so that the left front wheel 61 has three hole positions. According to the principle of three points determining a plane, when the left front wheel 61 and the left hub connector 551 are arranged opposite each other and the three hole positions correspond one to one, the axes of the left front wheel 61 and the left hub connector 551 are collinear, which facilitates the rotation of the left front wheel 61.

[0077] The working process of the steering switching device provided in this embodiment is as follows:

[0078] Four-wheel mode

[0079] The connecting shaft 41 on the current middle wheel 4 moves along the slide groove 321 on the frame 32 from Figure 4 Slide to Figure 5 In the position shown, the distance between the front middle wheel 4 and the frame 1 is relatively close, the front middle wheel 4 is not in contact with the ground, and the front middle wheel 4 is suspended relative to the ground. At this time, the steering of the entire vehicle is driven by the rotation of the input shaft 21 to drive the input gear 231 to rotate, the rotation of the input gear 231 drives the driving gear 232 to rotate, the driving gear 232 drives the coaxial driven gear 233 to rotate, and the driven gear 233 drives the output shaft 22 to rotate. The output shaft 22 drives the transmission shaft 52 to rotate through the second universal joint 51, and drives the turntable 54 to rotate through the ejector pin 56. The turntable 54 is hinged to the left connecting rod 531 through the first intermediate pin 8. The rotation of the turntable 54 drives the displacement of the left connecting rod 531. The left connecting rod 531 is hinged to the left wheel hub connector 551 through the first left pin 9. The displacement of the left connecting rod 531 allows the left wheel hub connector 551 to rotate around the axis of the first left pin 9. The left wheel hub connector 551 is hinged to the frame 1 through the second left pin 10, so that the left wheel hub connector 551 can rotate around the axis of the second left pin 10. Under the joint restriction of the first left pin 9 and the second left pin 10, the left front wheel 61 set on the left wheel hub connector 551 can achieve deflection. At this time, the first connection hole 611, the second connection hole 612 and the third connection hole 613 are configured to correspond to the first fixing hole 5511, the second fixing hole 5512 and the third fixing hole 5513 one by one and are fixed by bolts, and the axis of the front wheel mechanism 6 and the axis of the hub connecting assembly 55 are colinear, which facilitates the synchronous rotation of the hub connecting assembly 55 and the front wheel mechanism 6. Since the connection mode of the left front wheel 61 and the right front wheel 62 is bilaterally symmetrical, at this time, the whole kart is driven by the right front wheel 62, the left front wheel 61, the left rear wheel 71 and the right rear wheel 72 for four-wheel drive steering.

[0080] Three-wheel mode

[0081] The left wheel hub connector 551 is hinged to the vehicle frame 1 through the second left latch 10, and the left front wheel 61 is rotated around the axis of the first connecting hole 611, so that the second connecting hole 612 on the left front wheel 61 corresponds to the third fixing hole 5513 on the left wheel hub connector 551, and then the first connecting hole 611 on the left front wheel 61 corresponds to the first fixing hole 5511 on the left wheel hub connector 551 and is fixed by bolts, the second connecting hole 612 on the front wheel corresponds to the third fixing hole 5513 on the left wheel hub connector 551 and is fixed by bolts, the connection method of the left front wheel 61 and the right front wheel 62 is symmetrical on the left and right, at this time the axis of the front wheel mechanism 6 is located above the axis of the wheel hub connecting assembly 55, and the left front wheel 61 and the right front wheel 62 are suspended and do not contact the ground. At the same time, the steering of the whole vehicle is driven by the rotation of the input shaft 21 to drive the first universal joint 31 to rotate, the rotation of the first universal joint 31 drives the frame 32 to rotate, and the rotation of the frame 32 drives the front middle wheel 4 installed thereon to rotate. At this time, the whole vehicle is driven by the front middle wheel 4, the left rear wheel 71, and the right rear wheel 72 to perform three-wheel drive steering.

[0082] This embodiment also provides a go-kart, comprising the above-mentioned steering switching device, so that the go-kart can switch between a three-wheel mode and a four-wheel mode, while meeting the requirements of practicality and entertainment.

[0083] In the description herein, it should be understood that the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying 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 of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0084] In the description of this specification, the description with reference to the terms "an embodiment", "example", etc. 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.

[0085] In addition, the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A steering switching device, characterized in that: include: Frame (1); A driving mechanism (2) disposed on the vehicle frame (1); A middle wheel transmission mechanism (3) which is rotationally connected to the driving mechanism (2) and the vehicle frame (1); A front middle wheel (4) is rotatably connected to the middle wheel transmission mechanism (3), the driving mechanism (2) can drive the front middle wheel (4) to rotate through the middle wheel transmission mechanism (3), and the front middle wheel (4) is configured to be able to slide relative to the middle wheel transmission mechanism (3) so that the front middle wheel (4) selectively contacts the ground; A front wheel transmission mechanism (5) which is rotationally connected to the driving mechanism (2) and the vehicle frame (1); A front wheel mechanism (6) is located on both sides of the front end of the frame (1); the driving mechanism (2) can drive the front wheel mechanism (6) to rotate through the front wheel transmission mechanism (5); and the front wheel mechanism (6) is configured to be detachably connected to the front wheel transmission mechanism (5) and can move in a direction close to or away from the frame (1), so that the front wheel mechanism (6) selectively contacts the ground; A rear wheel mechanism (7) which is arranged on both sides of the rear end of the frame (1) and can be fixedly connected to the frame (1); The driving mechanism (2) comprises a driving source, an input shaft (21), an output shaft (22) and a gear assembly (23); the input shaft (21) is connected to the output shaft (22) via the gear assembly (23); one end of the input shaft (21) is connected to the output end of the driving source, and the other end is rotatably connected to the middle wheel transmission mechanism (3); the output end of the output shaft (22) is connected to the front wheel transmission mechanism (5); The middle wheel transmission mechanism (3) comprises a first universal joint (31) and a frame (32); the frame (32) is rotatably connected to the driving mechanism (2) via the first universal joint (31); the frame (32) is rotatably connected to the vehicle frame (1); and the front middle wheel (4) is slidably arranged on the frame (32).

2. The steering switching device according to claim 1, characterized in that: The gear assembly (23) comprises: An input gear (231) sleeved on the input shaft (21); A driving gear (232) meshed with the input gear (231); A driven gear (233) coaxially arranged with the driving gear (232); An output gear (234) is meshed with the driven gear (233), and the output shaft (22) is passed through the output gear (234).

3. The steering switching device according to claim 1, characterized in that: A slide groove (321) is provided on the frame (32), and the connecting shaft (41) of the front middle wheel (4) is inserted into the slide groove (321) and is slidably arranged with the slide groove (321).

4. The steering switching device according to claim 3, characterized in that: The cross section of the slide groove (321) is a C-shaped structure, and the opening of the slide groove (321) is arranged toward or away from the rear wheel mechanism (7).

5. The steering switching device according to claim 1, characterized in that: The front wheel transmission mechanism (5) comprises a second universal joint (51), a transmission shaft (52), a connecting rod assembly (53), a rotating plate (54) and a wheel hub connecting assembly (55); one end of the transmission shaft (52) is rotationally connected to the driving mechanism (2) via the second universal joint (51), and the other end is rotationally connected to the connecting rod assembly (53) via the rotating plate (54); the wheel hub connecting assembly (55) is detachably connected to the front wheel mechanism (6); the wheel hub connecting assembly (55) is rotationally connected to the connecting rod assembly (53) and the vehicle frame (1) respectively, and is used for deflection of the front wheel mechanism (6).

6. The steering switching device according to claim 5, characterized in that: The axis of the front wheel mechanism (6) and the axis of the wheel hub connection assembly (55) are collinear, or the axis of the front wheel mechanism (6) is located above the axis of the wheel hub connection assembly (55).

7. The steering switching device according to claim 5, characterized in that: The front wheel transmission mechanism (5) also includes a thimble (56), which is sleeved on the transmission shaft (52) and connected to the rotating disk (54).

8. A go-kart, characterized in that: It comprises the steering switching device as described in any one of claims 1-7.

Images