Wheelchair based on gear transmission and usage thereof

Abstract

The main problem solved by the present invention is how to make the wheelchair easier to push and safer to use. A wheelchair based on gear transmission, characterized in that it includes wheels, axles, seats, gears, rowing rod sleeves, and rowing rods. The axles are the rotating shafts of the wheels, the seats are located on the axles, the gears are coaxial with the wheels, the two are relatively fixed and rotate synchronously, there are two gears, distributed on the left and right sides of the wheelchair, the lower end of the rowing rod sleeve is coaxial with the wheels, the rowing rod sleeve can rotate around the axle, the main body of the rowing rod sleeve is hollow, the rowing rod passes through the rowing rod sleeve, and the rowing rod can move up and down in the rowing rod sleeve. The beneficial effect is that the rowing rod can be rowed back and forth by holding the rowing rod, and there is almost no need to bend over, which is convenient for exerting force. Secondly, the distance between the upper end of the rowing rod and the axle is large, which is more labor-saving. Finally, when using, the height of the hand is always higher than the wheel, eliminating the safety hazard of the wheel hitting the hand.

Description

Technical Field

[0001] The present invention relates to the technical field of wheelchairs, in particular to a wheelchair based on gear transmission. Background Art

[0002] Existing wheelchairs usually have a steel ring outside the wheel, and the wheel is pushed to rotate by holding the steel ring. First, because the height of the steel ring is lower than the wheel, the hand position is low when using it, and it is difficult to exert force. Secondly, because the diameter of the steel ring is smaller than the wheel, it is more difficult to push. Finally, when holding the steel ring, the hand may be hit by the wheel, which has certain safety hazards. Summary of the invention

[0003] The main problem solved by the present invention is how to make the wheelchair easier to push and safer to use.

[0004] A wheelchair based on gear transmission, characterized in that it includes wheels, axles, a seat, gears, a rowing rod sleeve, and a rowing rod, wherein the axle is the rotating axis of the wheel, the seat is located on the axle, the gear and the wheel are coaxial, the two are relatively fixed and rotate synchronously, there are two gears, which are distributed on the left and right sides of the wheelchair, there are two rowing rods, which are respectively located on the left and right sides of the wheelchair, the lower end of the rowing rod sleeve is coaxial with the wheel, the rowing rod sleeve can rotate around the axle, and the main body of the rowing rod sleeve is hollow, The rowing rod passes through the rowing rod cover, and the rowing rod can move up and down in the rowing rod cover. The upper end of the rowing rod is higher than the rowing rod cover, and the upper end of the rowing rod is higher than the wheel. The lower end of the rowing rod is located above the gear. The lower end of the rowing rod is provided with teeth, and the teeth are matched with the teeth of the gear. When in use, the rowing rod is pressed downward by holding the rowing rod, and the rowing rod moves downward, so that the teeth at the lower end of the rowing rod are engaged with the teeth of the gear. At the same time, the rowing rod is rowed forward or backward, which drives the rowing rod cover to move, and together drives the gear and wheel to rotate, thereby pushing the wheelchair to move.

[0005] The beneficial effect is that the upper end of the rowing rod is higher than the wheel. First, when using the wheelchair, the human body can hold the rowing rod and row it forward and backward, almost without bending over, which is convenient for exerting force. Secondly, the distance between the upper end of the rowing rod and the wheel axle is large, which is relatively labor-saving. Finally, when using it, the height of the hand is always higher than the wheel, eliminating the safety hazard of the wheel hitting the hand. In addition, holding the rowing rod and pressing it down, that is, putting the hand on the rowing rod and pressing it down slightly, is in line with the human body's force, and the hand just needs to hold the rowing rod all the time, and there is no need to switch the position of the hand holding the steel ring like the prior art. It is intuitive, convenient, clean and hygienic to use. At the same time, rowing the rowing rod forward or backward can push the wheelchair forward and backward, that is, it can move forward or backward, which is convenient to use. In addition, by adjusting the rowing speed of the left and right rowing rods of the wheelchair, the wheelchair can be controlled to turn (for example, the left rowing rod is rowed faster, and the wheelchair turns right), and turning is very convenient. According to the definition of Baidu Encyclopedia, a gear refers to a mechanical element with teeth on the rim that can continuously mesh and transmit motion and power.

[0006] There is a spring between the rowing rod and the rowing rod cover. The spring, the rowing rod and the rowing rod cover are coaxial. Both ends of the spring are supported by the rowing rod and the rowing rod cover. When the rowing rod is pressed downward, the spring is compressed, and the teeth at the lower end of the rowing rod are engaged with the teeth of the gear. Rowing the rowing rod can drive the wheel to rotate; after the rowing rod stops being pressed downward, the spring stretches, so that there is a certain distance between the lower end of the rowing rod and the gear, so that the rowing rod can be reset in the opposite direction in time to prepare for the next rowing.

[0007] The beneficial effect is that after the rowing rod stops being pressed downward, the lower end of the rowing rod and the gear lose engagement, and the rowing rod moves without resistance, making it easy to quickly reset the rowing rod in the opposite direction to prepare for the next rowing; at the same time, when the wheelchair wheels rotate by inertia (for example, the wheelchair goes downhill), the rowing rod stops being pressed downward, and there is a certain distance between the lower end of the rowing rod and the gear to avoid affecting the inertial rotation of the wheels.

[0008] The spring is located between the upper end of the rowing rod sleeve and the upper end of the rowing rod; the lower end of the spring is fixedly connected to the upper end of the rowing rod sleeve, and the upper end of the spring is fixedly connected to the upper end of the rowing rod.

[0009] The beneficial effect is that the diameter of the rowing rod sleeve is larger than the rowing rod, and the position of the spring just utilizes the upper end of the rowing rod sleeve as a resistance, the structure is simple and ingenious, the production is simple and the cost is low, and the force is stable. The lower end of the spring is fixedly connected to the upper end of the rowing rod sleeve, and the upper end of the spring is fixedly connected to the upper end of the rowing rod, that is, the spring limits the upward pull range of the rowing rod, preventing the rowing rod from being pulled upward and out of the rowing rod sleeve.

[0010] The lower end of the rowing rod sleeve has two forks, the two forks are respectively located on both sides of the gear, and the bottom ends of the two forks are coaxial with the gear; the gear is located on the outside of the wheel.

[0011] The beneficial effect is that the two forks make the structure and force of the rowing rod cover more stable, and the rowing rod cover will not tilt sideways when in use. The gear is located outside the wheel, which, on the one hand, facilitates the installation and paddling of the rowing rod cover, and on the other hand, reduces the wheelbase, making the overall structure more compact.

[0012] It also includes a limiting ring, which is installed on the seat. The rowing rod passes through the limiting ring, and the limiting ring limits the forward and backward rowing range of the rowing rod; the seat is provided with an armrest, and the limiting ring is installed on the outer side of the armrest.

[0013] The beneficial effect is that the limiting ring limits the forward and backward rowing range of the rowing rod, preventing the rowing rod from falling forward or backward to the ground.

[0014] It also includes a rubber sleeve, which is matched with the tooth shape of the rowing rod. The rubber sleeve is sleeved on the teeth of the rowing rod, and the rubber sleeve can be disassembled and replaced.

[0015] The beneficial effect is that since the rowing rod and the teeth of the gear need to contact and rub frequently, the rubber sleeve can increase the friction force and reduce the friction damage between the teeth of the rowing rod and the gear. Timely disassembly and replacement of the rubber sleeve can significantly increase the service life of the rowing rod and the gear.

[0016] The method for using the wheelchair is characterized by comprising the following steps:

[0017] A person sits on the wheelchair, holds the rowing bar and presses it downward, so that the rowing bar moves downward, and the teeth at the lower end of the rowing bar mesh with the teeth of the gear;

[0018] When you need to move forward, you row the rowing bar forward to drive the rowing bar cover to move, and together drive the gears and wheels to rotate, pushing the wheelchair forward; when you need to move backward, you row the rowing bar backward to push the wheelchair backward;

[0019] When the inertial motion of the wheelchair needs to be maintained, the rowing bar stops being pressed downward so that there is a certain distance between the lower end of the rowing bar and the gear to avoid affecting the inertial rotation of the wheel.

[0020] The beneficial effects are as follows: firstly, when using the wheelchair, the person can just hold the rowing pole and row it forward and backward, and there is almost no need to bend over, which is convenient for exerting force; secondly, the distance between the upper end of the rowing pole and the wheel axle is large, which is relatively labor-saving; finally, when using the wheel, the height of the hand is always higher than the wheel, eliminating the safety hazard of the wheel hitting the hand. In addition, holding the rowing pole and pressing it down, that is, putting the hand on the rowing pole and pressing it down slightly, is in line with the human body's force, and the hand only needs to hold the rowing pole all the time, and there is no need to switch the position of the hand holding the steel ring like the prior art, which is intuitive, convenient, clean and hygienic to use; at the same time, rowing the rowing pole forward or backward can push the wheelchair forward and backward, that is, it can move forward or backward, which is convenient to use.

[0021] After completing each forward or backward stroke of the paddle, stop pressing the paddle downward and promptly reset the paddle in the opposite direction to prepare for the next stroke.

[0022] The beneficial effect is that after the rowing rod stops being pressed downward, the lower end of the rowing rod and the gear lose engagement, and the rowing rod moves without resistance, making it easy to quickly reset the rowing rod in the opposite direction to prepare for the next rowing; at the same time, when the wheelchair wheels rotate by inertia, the rowing rod stops being pressed downward, and there is a certain distance between the lower end of the rowing rod and the gear to avoid affecting the inertial rotation of the wheels.

[0023] When braking is required, the rowing rod is pressed down with less force than normal, and the rowing rod part moves downward, causing the teeth at the lower end of the rowing rod to contact the teeth of the gear, generating friction resistance.

[0024] The beneficial effect is that the rowing rod also has a braking function, which makes the operation more convenient. At the same time, the arrangement of other braking devices can be omitted, the overall structure is simpler, and the production cost can be reduced.

[0025] When the wheelchair needs to turn right, the rowing speed of the left side of the wheelchair can be greater than that of the right side; when the wheelchair needs to turn left, the rowing speed of the right side of the wheelchair can be greater than that of the left side.

[0026] The beneficial effect is that the wheelchair can be controlled to turn by adjusting the rowing speed of the left and right rowing bars, and the turning is very convenient. It should be noted that the rowing speed of the rowing bar on one side is greater than that of the other side, including the case where the rowing speed of the other side is zero and the direction is opposite. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 . Schematic diagram of the overall structure of the present invention;

[0028] Figure 2 . Schematic diagram of the enlarged structure of the tooth area of ​​the rowing rod;

[0029] Figure 3 . A schematic diagram of the enlarged structure of the tooth area of ​​the rowing rod (omitting the rowing rod sleeve);

[0030] Figure 4 .Schematic diagram of the rowing rod cover structure;

[0031] Figure 5 .Top view of the paddle sleeve (3D perspective);

[0032] Figure 6 .Schematic diagram of the assembly structure of the row rod and spring;

[0033] Figure 7 .Schematic diagram of the assembly structure of the rowing rod sleeve, rowing rod and gear;

[0034] Figure 8 .Schematic diagram of the structure when holding the rowing rod and pressing down;

[0035] Fig. 9 . A magnified structural diagram of the toothed area of ​​the rowing pole when the hand holds the rowing pole and presses down (the rowing pole cover is omitted);

[0036] Fig.10 .Schematic diagram of the structure when holding the rowing rod, pressing down and rowing forward.

[0037] In the figure: 1. wheel, 2. axle, 3. seat, 4. gear, 5. rowing rod sleeve, 6. rowing rod, 61. teeth, 7. spring, 51. fork, 8. limit ring, 31. armrest. DETAILED DESCRIPTION

[0038] Example

[0039] like Figure 1-10 As shown, a wheelchair based on gear transmission is characterized in that it includes wheels, axles, a seat, gears, a rowing rod sleeve, and a rowing rod. The axle is the rotating axis of the wheel, the seat is located on the axle, the gear and the wheel are coaxial, the two are relatively fixed and rotate synchronously, there are two gears, distributed on the left and right sides of the wheelchair, there are two rowing rods, respectively located on the left and right sides of the wheelchair, the lower end of the rowing rod sleeve is coaxial with the wheel, the rowing rod sleeve can rotate around the axle, and the rowing rod sleeve body is hollow The rowing rod passes through the rowing rod cover, and the rowing rod can move up and down in the rowing rod cover. The upper end of the rowing rod is higher than the rowing rod cover, and the upper end of the rowing rod is higher than the wheel. The lower end of the rowing rod is located above the gear. The lower end of the rowing rod has teeth, and the teeth are matched with the teeth of the gear. When in use, the rowing rod is pressed downward by hand, and the rowing rod moves downward, so that the teeth at the lower end of the rowing rod are engaged with the teeth of the gear. At the same time, the rowing rod is rowed forward or backward to drive the rowing rod cover to move, and together drive the gear and wheel to rotate, thereby pushing the wheelchair to move.

[0040] There is a spring between the rowing rod and the rowing rod cover. The spring, the rowing rod and the rowing rod cover are coaxial. Both ends of the spring are supported by the rowing rod and the rowing rod cover. When the rowing rod is pressed downward, the spring is compressed, and the teeth at the lower end of the rowing rod are engaged with the teeth of the gear. Rowing the rowing rod can drive the wheel to rotate; after the rowing rod stops being pressed downward, the spring stretches, so that there is a certain distance between the lower end of the rowing rod and the gear, so that the rowing rod can be reset in the opposite direction in time to prepare for the next rowing.

[0041] The spring is located between the upper end of the rowing rod sleeve and the upper end of the rowing rod; the lower end of the spring is fixedly connected to the upper end of the rowing rod sleeve, and the upper end of the spring is fixedly connected to the upper end of the rowing rod.

[0042] The lower end of the rowing rod sleeve has two forks, the two forks are respectively located on both sides of the gear, and the bottom ends of the two forks are coaxial with the gear; the gear is located on the outside of the wheel.

[0043] It also includes a limiting ring, which is installed on the seat, the rowing rod passes through the limiting ring, and the limiting ring limits the forward and backward rowing range of the rowing rod; the seat is provided with an armrest, and the limiting ring is installed on the outside of the armrest.

[0044] It also includes a rubber sleeve, which is matched with the tooth shape of the rowing rod. The rubber sleeve is sleeved on the teeth of the rowing rod, and the rubber sleeve can be disassembled and replaced. Example

[0045] The method for using the wheelchair is characterized by comprising the following steps:

[0046] A person sits on the wheelchair, holds the rowing bar and presses it downward, so that the rowing bar moves downward, and the teeth at the lower end of the rowing bar mesh with the teeth of the gear;

[0047] When you need to move forward, you row the rowing bar forward to drive the rowing bar cover to move, and together drive the gears and wheels to rotate, pushing the wheelchair forward; when you need to move backward, you row the rowing bar backward to push the wheelchair backward;

[0048] When the inertial motion of the wheelchair needs to be maintained, the rowing bar stops being pressed downward so that there is a certain distance between the lower end of the rowing bar and the gear to avoid affecting the inertial rotation of the wheel.

[0049] After completing each forward or backward stroke of the paddle, stop pressing the paddle downward and promptly reset the paddle in the opposite direction to prepare for the next stroke.

[0050] When braking is required, the rowing rod is pressed down with less force than normal, and the rowing rod part moves downward, causing the teeth at the lower end of the rowing rod to contact the teeth of the gear, generating friction resistance.

[0051] When the wheelchair needs to turn right, the rowing speed of the left side of the wheelchair can be greater than that of the right side; when the wheelchair needs to turn left, the rowing speed of the right side of the wheelchair can be greater than that of the left side.

Claims

1. A wheelchair based on gear transmission, characterized in that: The wheelchair comprises a wheel, an axle, a seat, a gear, a rowing rod sleeve, and a rowing rod, wherein the wheel axle is the rotating axis of the wheel, the seat is located on the wheel axle, the gear and the wheel are coaxial, the two are relatively fixed and rotate synchronously, there are two gears, which are distributed on the left and right sides of the wheelchair, there are two rowing rods, which are respectively located on the left and right sides of the wheelchair, the lower end of the rowing rod sleeve is coaxial with the wheel, the rowing rod sleeve can rotate around the wheel axle, the rowing rod sleeve body is hollow, the rowing rod passes through the rowing rod sleeve, the rowing rod can move up and down in the rowing rod sleeve, the upper end of the rowing rod is higher than the rowing rod sleeve, the upper end of the rowing rod is higher than the wheel, the lower end of the rowing rod is located above the gear, the lower end of the rowing rod has teeth, and the teeth are matched with the teeth of the gear. When in use, the rowing rod is held and pressed downward, and the rowing rod moves downward, so that the teeth at the lower end of the rowing rod mesh with the teeth of the gear, and at the same time, the rowing rod is rowed forward or backward to drive the rowing rod sleeve to move, thereby driving the gear and wheel to rotate together, thereby pushing the wheelchair to move. There is a spring between the rowing rod and the rowing rod sleeve. The spring, the rowing rod and the rowing rod sleeve are coaxial. The two ends of the spring are supported by the rowing rod and the rowing rod sleeve. When the rowing rod is pressed downward, the spring is compressed, and the teeth at the lower end of the rowing rod are meshed with the teeth of the gear. Rowing the rowing rod can drive the wheel to rotate. After the rowing rod stops being pressed downward, the spring stretches, so that there is a certain distance between the lower end of the rowing rod and the gear, so that the rowing rod can be reset in the opposite direction in time to prepare for the next rowing. The spring is located between the upper end of the rowing rod sleeve and the upper end of the rowing rod; the lower end of the spring is fixedly connected to the upper end of the rowing rod sleeve, and the upper end of the spring is fixedly connected to the upper end of the rowing rod.

2. A wheelchair based on gear transmission according to claim 1, characterized in that: The lower end of the rowing rod sleeve has two forks, the two forks are respectively located on both sides of the gear, and the bottom ends of the two forks are coaxial with the gear; the gear is located on the outside of the wheel.

3. According to claim 1, a wheelchair based on gear transmission is characterized in that it also includes a limit ring, which is installed on the seat, and the rowing rod passes through the limit ring, and the limit ring limits the forward and backward rowing range of the rowing rod; the seat has armrests, and the limit ring is installed on the outside of the armrests.

4. A wheelchair based on gear transmission according to claim 1, characterized in that: It also includes a rubber sleeve, which is matched with the tooth shape of the rowing rod. The rubber sleeve is sleeved on the teeth of the rowing rod, and the rubber sleeve can be disassembled and replaced.

5. The method of using a wheelchair based on gear transmission as claimed in claim 1, characterized in that: The steps include: A person sits on the wheelchair, holds the rowing bar and presses it downward, so that the rowing bar moves downward, and the teeth at the lower end of the rowing bar mesh with the teeth of the gear; When you need to move forward, you row the rowing bar forward to drive the rowing bar cover to move, and together drive the gears and wheels to rotate, pushing the wheelchair forward; when you need to move backward, you row the rowing bar backward to push the wheelchair backward; When the inertial motion of the wheelchair needs to be maintained, the rowing bar stops being pressed downward so that there is a certain distance between the lower end of the rowing bar and the gear to avoid affecting the inertial rotation of the wheel.

6. The method for using a wheelchair based on gear transmission according to claim 5, characterized in that: After completing each forward or backward stroke of the paddle, stop pressing the paddle downward and promptly reset the paddle in the opposite direction to prepare for the next stroke.

7. The method for using a wheelchair based on gear transmission according to claim 5, characterized in that: When braking is required, the rowing rod is pressed down with less force than normal, and the rowing rod part moves downward, causing the teeth at the lower end of the rowing rod to contact the teeth of the gear, generating friction resistance.

8. The method for using a wheelchair based on gear transmission according to claim 5, characterized in that: When the wheelchair needs to turn right, the rowing speed of the left side of the wheelchair can be greater than that of the right side; when the wheelchair needs to turn left, the rowing speed of the right side of the wheelchair can be greater than that of the left side.

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