초록 ▼

The present invention relates to a wheelchair, comprising a wheelchair body, a control system, two front wheels and two rear wheels mounted to the front part and rear part of the wheelchair body respectively. The wheelchair further comprises a left and right transmission gear and a front and rear tr

The present invention relates to a wheelchair, comprising a wheelchair body, a control system, two front wheels and two rear wheels mounted to the front part and rear part of the wheelchair body respectively. The wheelchair further comprises a left and right transmission gear and a front and rear transmission gear mounted to the front part and rear part of the wheelchair body and connected to the two front wheels, the two rear wheels and the control system respectively. The left and right transmission gear is used to drive the two front wheels to rotate left and right and the front and rear transmission gear is used to drive the two rear wheels to move forward and backward and assist left and right rotation. The present invention enables the wheelchair to turn left or right while moving forward or backward on two parallel lines, allowing convenience of use.

대표청구항 ▼

1. A wheelchair, comprising: a wheelchair body;a control system;two front wheels and two rear wheels mounted to a front part and a rear part of the wheelchair body respectively;wherein the wheelchair further comprises a left and right transmission gear used to drive the two front wheels to rotate le

1. A wheelchair, comprising: a wheelchair body;a control system;two front wheels and two rear wheels mounted to a front part and a rear part of the wheelchair body respectively;wherein the wheelchair further comprises a left and right transmission gear used to drive the two front wheels to rotate left and right, and a front and rear transmission gear used to drive the two rear wheels to move forward and backward and assist left and right rotation, in which the left and right transmission gear is mounted to the front part of the wheelchair body, and the front and rear transmission gear is mounted to the rear part of the wheelchair body; and the left and right transmission gear is connected to the two front wheels, the two rear wheels and the control system, the front and rear transmission gear is connected to the two front wheels, the two rear wheels and the control system;and wherein the left and right transmission gear comprises a first motor, a left and right movement member connected to the first motor which is connected to the control system, and two first chains mounted on spindles of the two front wheels, which are all mounted into a front end of the wheelchair body;and wherein one end of each of the two first chains is mutually connected through a first metal wire, while the other end of each of the two first chains is connected to two ends of the left and right movement member through a second metal wire;and wherein the first motor drives the left and right movement member to move left and right when it the first motor rotates, then the left and right movement member drives the two first chains on spindles of the wheels to move left and right by the first metal wire and the second metal wire and the two first chains drive the two front wheels to rotate left and right. 2. The wheelchair according to claim 1, wherein the front and rear transmission gear comprises a second motor, a drive gear, a driven gear and a main bearing, which are all mounted into a rear end of the wheelchair body; and wherein the second motor is connected to the control system and the drive gear that is connected to the driven gear through second chains respectively, and the main bearing is mounted on the driven gear;and wherein the second motor drives the drive gear to rotate when it the second motor rotates, then the drive gear drives the driven gear to rotate by the second chains, and the driven gear drives the main bearing to rotate, while the main bearing drives two rear wheels to move forward and backward and assists left and right rotation. 3. The wheelchair according to claim 1, wherein the front and rear transmission gear comprises a second motor, a drive gear, a driven gear and a main bearing, which are all mounted into a rear end of the wheelchair body; and wherein the second motor is connected to the control system and the drive gear that is connected to the driven gear through second chains respectively, and the main bearing is mounted on the driven gear;and wherein the second motor drives the drive gear to rotate when the second motor rotates, then the drive gear drives the driven gear to rotate by the second chains, and the driven gear drives the main bearing to rotate, while the main bearing drives two rear wheels to move forward and backward and assists left and right rotation. 4. The wheelchair according to claim 2, wherein the main bearing has a threaded end at one end which is mounted into a bearing hole of one rear wheel and connected to the bearing hole in a threaded manner, and a smooth end at the other end which is mounted into a bearing hole of the other rear wheel and rotating freely in the bearing hole; and wherein the main bearing drives the rear wheel on its threaded end to move forward and backward and assists left and right rotation when the main bearing rotates, while the rear wheel on its smooth end follows the rear wheel on the threaded end to move. 5. The wheelchair according to claim 3, wherein the main bearing has a threaded end at one end which is mounted into a bearing hole of one rear wheel and connected to the bearing hole in a threaded manner, and a smooth end at the other end which is mounted into a bearing hole of the other rear wheel and rotating freely in the bearing hole; and wherein the main bearing drives the rear wheel on its threaded end to move forward and backward and assists left and right rotation when the main bearing rotates, while the rear wheel on its smooth end follows the rear wheel on the threaded end to move. 6. The wheelchair according to claim 1, wherein the spindle of each of the two front wheels is disposed in a housing in a freely rotatable manner, in which the housing is connected to a bracket mounted on front end of the wheelchair body; and wherein the lower end of the spindle of each of the two front wheels is connected to an inverted U-shaped structure, in which the inverted U-shaped structure is rotatable left and right relative to the spindle, and left and right ends of the front wheel are mounted on the U-shaped structure and rotatable on the U-shaped structure. 7. The wheelchair according to claim 6, wherein the lower end of the spindle of each of the two front wheels is connected to an inverted U-shaped structure through a chain wheel in which the first chains is disposed in a sleeved manner, so that the first chains are configured to drive the inverted U-shaped structures to rotate left and right when they move left and right, by which two front wheels are driven to rotate left and right. 8. The wheelchair according to claim 1, wherein the control system comprises a master controller, a main circuit, a left and right transmission gear circuit and a front and rear transmission gear circuit, in which the master controller, the left and right transmission gear circuit and the front and rear transmission gear circuit are all connected to the main circuit and the front and rear transmission gear circuit is connected to the master controller. 9. The wheelchair according to claim 8, wherein the control system is a speed governor mounted on a handrail on one side of the wheelchair body. 10. The wheelchair according to claim 1, wherein the left and right transmission gear further comprises a reduction gearbox mounted into the front end of the wheelchair body and connected to the first motor. 11. The wheelchair according to claim 1, wherein the left and right movement member is a block. 12. The wheelchair according to claim 11, wherein at least one ball groove in which a plurality of rows of balls is positioned and an oil storage groove for storing and releasing lubricating oil in which lubricating oil for lubricating balls is stored are disposed at bottom of the block; and wherein the balls partially are extruded above bottom surface of the block and are contacted with a bottom plate of the wheelchair body so that they can move smoothly on the bottom plate of the wheelchair body;and wherein the oil storage groove is positioned correspondingly to movement locus of the balls. 13. The wheelchair according to claim 12, wherein two rows of balls are positioned in the ball groove.