A waist-swing driven tricycle

Abstract

The present invention relates to a waist-swing-driven tricycle, the body of which mainly consists of a double-spur bevel gear one-way mechanism, a crank-rocker backrest mechanism, a tricycle carrier and a reversing mechanism. This tricycle does not require external power such as electricity, and only by the forward and backward swing of the lumbar spine can the elderly or people with limb diseases drive the tricycle forward or backward to assist in tasks such as fetching and delivering objects, and at the same time, moderate exercise of parts such as the lumbar spine can be carried out during the process of walking on behalf of the user, playing roles such as rehabilitation and fitness.

Description

Technical Field

[0001] The present invention belongs to the field of walking aids, and particularly relates to a waist-swing-driven tricycle. Background Art

[0002] Due to the long-term influence of factors such as one's own body weight, aging, other external gravity, pressure, occupational habitual postures, natural disasters, and man-made disasters, various defects or disabilities may occur in people's bodies. These diseases bring pain and discomfort to patients in the cervical spine, lumbar spine, upper limbs, lower limbs, etc. For those who have physiological problems with their legs and cannot walk, walking aids undoubtedly become essential products for this problem. Currently, common walking aids are wheelchairs, armrests, and crutches. However, these walking aids require strong and healthy arms to be used. If this group of people also have diseases in their arms and cannot drive the existing walking aids, the currently common walking aids cannot be used normally. In view of this, the invention team of the present invention invented "a waist-swing-driven tricycle". Summary of the Invention

[0003] Objective of the present invention: Aiming at the problem that the current walking aids need to be driven by strong and healthy arms, the present invention develops a waist-swing-driven tricycle. This tricycle does not require external power such as electricity, and only by the forward and backward swing of the lumbar spine, the elderly or people with diseases in their limbs can drive the tricycle forward or backward to assist in tasks such as fetching and delivering objects, and at the same time, the lumbar spine and other parts can perform moderate exercise during the process of walking on behalf, playing roles such as rehabilitation and fitness.

[0004] Technical solution of the present invention: A waist-swing-driven tricycle, whose main body is mainly composed of a double-spur bevel gear one-way mechanism 40, a crank-rocker backrest mechanism 41, a tricycle carrier 42, and a reversing mechanism 43. The swing backrest 14 of the crank-rocker backrest mechanism 41 and the seat 2 of the tricycle carrier 42 form a rotating pair through a backrest swing pin 38. One end of the elastic tension rope 36 of the crank-rocker backrest mechanism 41 is fixedly connected to the seat 2 of the tricycle carrier 42. The first-stage driven bevel gear 10 of the crank-rocker backrest mechanism 41 is fixedly connected to the double-bevel gear shaft 9 of the double-spur bevel gear one-way mechanism 40. The driving bevel gear 27 of the reversing mechanism 43 is fixedly connected to the double-ratchet shaft 17 of the double-spur bevel gear one-way mechanism 40. Both ends of the spline shaft 26 of the reversing mechanism 43 are fixedly connected to the right wheel 6 and the left wheel 8 respectively. The locking groove 29 and the support frame 30 of the reversing mechanism 43 are fixed on the vehicle support frame 4 of the tricycle carrier 42. The double-bevel gear shaft 9 and the double-ratchet shaft 17 of the double-spur bevel gear one-way mechanism 40, the reversing transmission shaft 23 and the spline shaft 26 of the reversing mechanism 43, and the crank support 35 of the crank-rocker backrest mechanism 41 are all installed on the box body 7 and the support plate 3 of the tricycle carrier 42.

[0005] The described crank-rocker backrest mechanism 41 is mainly composed of a first-stage driven bevel gear 10, a first-stage driving bevel gear 11, a crankshaft 12, a crank 13, a swing backrest 14, a crank support 35, an elastic tension rope 36, a backrest rotation pin 37, a backrest swing pin 38, a crank rotation pin 39, and a connecting rod 44. With the crankshaft 12 and the crank rotation pin 39 as the fulcrums, it is connected through the crank rotation pin 39 and the backrest rotation pin 37. The crank 13, the connecting rod 44, and the swing backrest 14 form a crank-rocker mechanism. The first-stage driving bevel gear 11 and the crank 13 are both fixed on the crankshaft 12. The first-stage driving bevel gear 11 meshes with the first-stage driven bevel gear 10. One end of the elastic tension rope 36 is fixedly connected to one side of the swing backrest 14.

[0006] The described double-ratchet bevel gear one-way mechanism 40 is mainly composed of a double bevel gear shaft 9, a right ratchet bevel gear 15, a left ratchet bevel gear 16, a double ratchet shaft 17, a double meshing bevel gear 18, a left ratchet 19, and a right ratchet 20. The right ratchet 20 is installed between the right ratchet bevel gear 15 and the double ratchet shaft 17. The left ratchet 19 is installed between the left ratchet bevel gear 16 and the double ratchet shaft 17. The right ratchet 20 ensures the synchronous clockwise rotation of the right ratchet bevel gear 15 and the double ratchet shaft 17. When rotating counterclockwise, the right ratchet bevel gear 15 idles on the double ratchet shaft 17. The left ratchet 19 ensures the synchronous clockwise rotation of the left ratchet bevel gear 16 and the double ratchet shaft 17. When rotating counterclockwise, the left ratchet bevel gear 16 idles on the double ratchet shaft 17. The right ratchet bevel gear 15 and the left ratchet bevel gear 16 respectively mesh with the double meshing bevel gear 18. The rotation directions of the right ratchet bevel gear 15 and the left ratchet bevel gear 16 are opposite at all times. The double meshing bevel gear 18 is fixed on the double bevel gear shaft 9.

[0007] The described reversing mechanism 43 mainly consists of a front and rear gear shift fork 21, an upper bevel gear 22, a reversing transmission shaft 23, a lower bevel gear 24, a double-sliding bevel gear 25, a spline shaft 26, a driving bevel gear 27, a locking groove 29, and a support frame 30. Its characteristics are that the double-sliding bevel gear 25 is a double-sliding bevel gear with a spline groove inside, the spline shaft 26 is a spline shaft, the double-sliding bevel gear 25 is assembled on the spline shaft 26 and can move left and right on the spline shaft 26. The snap ring 28 of the front and rear gear shift fork 21 is sleeved loosely on the double-sliding bevel gear 25 and can rotate freely on the double-sliding bevel gear 25. The front and rear gear shift fork 21 consists of a snap ring 28, a tension spring 31, a front and rear gear shift fork sleeve 32, a front and rear gear shift fork rod 33, and a hook 34. The hook 34 and the snap ring 28 are respectively fixed at both ends of the front and rear gear shift fork 21. The front and rear gear shift fork rod 33 can move inside the front and rear gear shift fork sleeve 32. Both ends of the tension spring 31 are respectively connected to the front and rear gear shift fork sleeve 32 and the front and rear gear shift fork rod 33. The tension spring 31 makes the hook 34 at the front section of the front and rear gear shift fork 21 closely adhere to the groove of the locking groove 29. There are three grooves in the locking groove 29, and the three grooves respectively lock the front and rear gear shift fork 21 in three positions: left, middle, and right. When the front and rear gear shift fork 21 is locked in the left end position, the right bevel gear of the double-sliding bevel gear 25 meshes with the right teeth of the lower bevel gear 24. When the front and rear gear shift fork 21 is locked in the right end position, the left bevel gear of the double-sliding bevel gear 25 meshes with the left teeth of the lower bevel gear 24. When the front and rear gear shift fork 21 is locked in the middle position, neither the left bevel gear nor the right bevel gear of the double-sliding bevel gear 25 meshes with the lower bevel gear 24. The upper bevel gear 22 and the lower bevel gear 24 are respectively fixed at the upper and lower ends of the reversing transmission shaft 23. The upper bevel gear 22 meshes with the driving bevel gear 27. The front and rear gear shift fork 21 is supported and guided by the support frame 30.

[0008] The described three-wheeled vehicle carrier 42 mainly consists of a handlebar 1, a seat 2, a support plate 3, a vehicle support frame 4, a front wheel 5, a right wheel 6, a box body 7, and a left wheel 8. The support plate 3 is fixed inside the box body 7. The handlebar 1 is installed on the front wheel 5. The seat 2 is fixed on the vehicle support frame 4. The vehicle support frame 4 and the box body 7 are fixed and are both supported by the front wheel 5, the right wheel 6, and the left wheel 8.

[0009] The beneficial effects of the present invention are as follows: The three-wheeled vehicle can be driven forward or backward by the elderly or people with limb diseases through the forward and backward swing of the waist to assist in tasks such as fetching and delivering objects, and at the same time, it can moderately exercise parts such as the lumbar spine during the process of walking on behalf, playing roles such as rehabilitation and fitness. Description of the Drawings

[0010] Figure 1 is the three-dimensional view of the waist-swing-driven three-wheeled vehicle Figure One ;

[0011] Figure 2is the three-dimensional of the waist swing drive tricycle Figure Two ;

[0012] Figure 3 is the three-dimensional of the waist swing drive tricycle Figure Three ;

[0013] Figure 4 is the partial three-dimensional of the waist swing drive tricycle Figure One ;

[0014] Figure 5 is the partial three-dimensional of the waist swing drive tricycle Figure Two ;

[0015] Figure 6 is the transmission of the double-spur bevel gear one-way mechanism, crank rocker backrest mechanism and reversing mechanism Figure One ;

[0016] Figure 7 is the transmission of the double-spur bevel gear one-way mechanism, crank rocker backrest mechanism and reversing mechanism Figure Two ;

[0017] Figure 8 is the crank rocker backrest mechanism;

[0018] Figure 9 is the double-spur bevel gear one-way mechanism and reversing mechanism;

[0019] Figure 10 is the double-spur bevel gear one-way mechanism;

[0020] Figure 11 is the partial view of the double-spur bevel gear one-way mechanism;

[0021] Figure 12 is the reversing mechanism Figure One ;

[0022] Figure 13 is the reversing mechanism Figure Two ;

[0023] Figure 14 is the partial three-dimensional of the front and rear reversing device Figure One ;

[0024] Figure 15 is the partial three-dimensional of the front and rear reversing device Figure Two ;

[0025] Figure 16 is the partial sectional view of the front and rear gear shift fork;

[0026] Figure 17 are the support plate and the box body.

[0027] Among them,

[0028] 1. Faucet, 2. Seat, 3. Support plate, 4. Bicycle support frame, 5. Front wheel, 6. Right wheel, 7. Box body, 8. Left wheel, 9.

[0029] Double bevel gear shaft, 10. First-stage driven bevel gear, 11. First-stage driving bevel gear, 12. Crankshaft, 13. Crank, 14. Swing backrest, 15. Right ratchet bevel gear, 16. Left ratchet bevel gear, 17. Double ratchet shaft, 18. Double meshing bevel gear, 19. Left ratchet, 20. Right ratchet, 21. Forward and reverse shift fork, 22. Upper bevel gear, 23. Reversing drive shaft, 24. Lower bevel gear, 25. Double-link sliding bevel gear, 26. Spline shaft, 27. Driving bevel gear, 28. Snap ring, 29. Locking groove, 30. Support frame, 31. Tension spring, 32. Forward and reverse shift fork sleeve, 33. Forward and reverse shift fork rod, 34. Hook, 35. Crank support, 36. Elastic tension rope, 37. Backrest rotation pin, 38. Backrest swing pin, 39. Crank rotation pin, 40. Double-ratchet bevel gear one-way mechanism, 41. Crank rocker backrest mechanism, 42. Tricycle carrier, 43. Reversing mechanism, 44. Connecting rod Detailed implementation method

[0030] As Figure 1 — Figure 17 For example, when the lumbar swing-driven tricycle needs to move forward or backward, first let the elderly or people with limb diseases sit on the seat 2 of the tricycle, hold the faucet 1 of the tricycle with both hands, and lean the back tightly against the swing backrest 14. Under the dual action of the forward and backward swing of the lumbar spine and the tension of the elastic tension rope 36, the swing backrest 14 swings forward and backward. The forward and backward swing driving force drives the tricycle to move forward and backward through the crank rocker backrest mechanism 41, the double-ratchet bevel gear one-way mechanism 40 and the reversing mechanism 43.

[0031] When the dual action of the lumbar spine pressure of a person and the tension of the elastic tension rope 36 causes the swing backrest 14 to swing forward and backward, the swing backrest 14 drives the crank 13 to rotate under the force transmission of the connecting rod 44. The crank 13 drives the double bevel gear shaft 9 and the double meshing bevel gear 18 to rotate through the crankshaft 12, the first-stage driving bevel gear 11 and the first-stage driven bevel gear 10.

[0032] When the swinging backrest 14 drives the crank 13 to rotate counterclockwise, through the meshing transmission of the first-stage driving bevel gear 11 and the first-stage driven bevel gear 10, the double-meshing bevel gear 18 rotates clockwise. Since both sides of the double-meshing bevel gear 18 are simultaneously meshed with the right ratchet bevel gear 15 and the left ratchet bevel gear 16, at this time, the right ratchet bevel gear 15 rotates clockwise and the left ratchet bevel gear 16 rotates counterclockwise. Also, because the right ratchet 20 ensures that the right ratchet bevel gear 15 rotates synchronously with the double-ratchet shaft 17 in the clockwise direction, and the right ratchet bevel gear 15 idles on the double-ratchet shaft 17 during counterclockwise rotation, and the left ratchet 19 ensures that the left ratchet bevel gear 16 rotates synchronously with the double-ratchet shaft 17 in the clockwise direction, and the left ratchet bevel gear 16 idles on the double-ratchet shaft 17 during counterclockwise rotation. Therefore, at this time, the right ratchet bevel gear 15 rotates synchronously with the double-ratchet shaft 17 in the clockwise direction, the left ratchet bevel gear 16 idles on the double-ratchet shaft 17, and the double-ratchet shaft 17 is driven by the right ratchet bevel gear 15 to rotate clockwise.

[0033] When the swinging backrest 14 drives the crank 13 to rotate clockwise, through the meshing transmission of the first-stage driving bevel gear 11 and the first-stage driven bevel gear 10, the double-meshing bevel gear 18 rotates counterclockwise. Since both sides of the double-meshing bevel gear 18 are simultaneously meshed with the right ratchet bevel gear 15 and the left ratchet bevel gear 16, at this time, the right ratchet bevel gear 15 rotates counterclockwise and the left ratchet bevel gear 16 rotates clockwise. Also, because the right ratchet 20 ensures that the right ratchet bevel gear 15 rotates synchronously with the double-ratchet shaft 17 in the clockwise direction, and the right ratchet bevel gear 15 idles on the double-ratchet shaft 17 during counterclockwise rotation, and the left ratchet 19 ensures that the left ratchet bevel gear 16 rotates synchronously with the double-ratchet shaft 17 in the clockwise direction, and the left ratchet bevel gear 16 idles on the double-ratchet shaft 17 during counterclockwise rotation. Therefore, at this time, the right ratchet bevel gear 15 idles on the double-ratchet shaft 17, the left ratchet bevel gear 16 rotates synchronously with the double-ratchet shaft 17 in the clockwise direction, and the double-ratchet shaft 17 is driven by the left ratchet bevel gear 16 to rotate clockwise.

[0034] Whether the lumbar swinging backrest 14 drives the crank 13 to rotate clockwise or counterclockwise, it can drive the double-ratchet shaft 17 to rotate clockwise. When the double-ratchet shaft 17 rotates clockwise, its power drives the lower bevel gear 24 to rotate unidirectionally through the driving bevel gear 27, the upper bevel gear 22 and the reversing transmission shaft 23.

[0035] When the lower bevel gear 24 rotates unidirectionally, and when the front and rear gear shift fork 21 is moved and locked in the left-end groove position in the locking groove 29, the front and rear gear shift fork 21 fixes the double-sliding bevel gear 25 in the leftmost position through the snap ring 28. At this time, the right-end bevel gear of the double-sliding bevel gear 25 meshes with the right-end teeth of the lower bevel gear 24 for transmission. The right-end bevel gear of the double-sliding bevel gear 25 drives the double-sliding bevel gear 25 to rotate counterclockwise, and the double-sliding bevel gear 25 drives the spline shaft 26 and the right wheel 6 and the left wheel 8 at both ends thereof to rotate counterclockwise. At this time, the lumbar swing drives the tricycle to reverse.

[0036] When the lower bevel gear 24 rotates in one direction and the forward and reverse shift fork 21 is moved to lock it in the right-end groove position in the locking groove 29, the forward and reverse shift fork 21 fixes the double-sliding bevel gear 25 in the rightmost position through the snap ring 28. At this time, the left-end bevel gear of the double-sliding bevel gear 25 meshes with the left-end teeth of the lower bevel gear 24 for transmission. The left-end bevel gear of the double-sliding bevel gear 25 drives the double-sliding bevel gear 25 to rotate clockwise, and the double-sliding bevel gear 25 drives the spline shaft 26 and the right wheel 6 and the left wheel 8 at both ends thereof to rotate clockwise. At this time, the oscillating drive tricycle moves forward.

[0037] When the lower bevel gear 24 rotates in one direction and the forward and reverse shift fork 21 is moved to lock it in the middle-end groove position in the locking groove 29, the forward and reverse shift fork 21 fixes the double-sliding bevel gear 25 in the middle position through the snap ring 28. At this time, neither the left-end bevel gear nor the right-end bevel gear of the double-sliding bevel gear 25 meshes with the lower bevel gear 24, and the double-sliding bevel gear 25 is separated from the lower bevel gear 24. At this time, the lower bevel gear 24 is in an idling state and cannot drive the spline shaft 26 and the right wheel 6 and the left wheel 8 at both ends thereof to rotate. At this time, the oscillating drive tricycle is in a state of neither moving forward nor moving backward (stopped state).

[0038] That is, when the forward and reverse shift fork 21 is locked in the left, middle, and right three positions in the locking groove 29 respectively, the oscillating drive tricycle is in three states of backward movement, stop, and forward movement respectively. By changing the locking position of the forward and reverse shift fork 21, the oscillating drive tricycle can move forward and backward freely and reach the predetermined position flexibly.

Claims

1. A waist-swing driven tricycle, the main body of which is mainly composed of a double-spur bevel gear one-way mechanism, a crank-rocker backrest mechanism, a tricycle carrier and a reversing mechanism, characterized in that The crank rocker backrest mechanism is mainly composed of a primary driven bevel gear, a primary driving bevel gear, a crank shaft, a crank, a swinging backrest, a crank support, an elastic tensioning rope, a backrest rotating pin, a backrest swinging pin, a crank rotating pin and a connecting rod. The double ratchet bevel gear one-way mechanism is mainly composed of a double bevel gear shaft, a right ratchet bevel gear, a left ratchet bevel gear, a double ratchet shaft, a double meshing bevel gear, a left ratchet and a right ratchet. The swinging backrest of the crank rocker backrest mechanism and the seat of the tricycle carrier form a rotating pair through the backrest swinging pin. One end of the elastic tensioning rope of the crank rocker backrest mechanism is fixedly connected to the three On the seat of the tricycle carrier, the first-stage driven bevel gear of the crank rocker backrest mechanism is fixed on the double-bevel gear shaft of the double-ratchet bevel gear one-way mechanism, the active bevel gear of the reversing mechanism is fixed on the double ratchet shaft of the double-ratchet bevel gear one-way mechanism, the two ends of the spline shaft of the reversing mechanism are fixed to the right wheel and the left wheel respectively, the locking groove and support frame of the reversing mechanism are fixed on the vehicle support frame of the tricycle carrier, the double-bevel gear shaft and double ratchet shaft of the double-ratchet bevel gear one-way mechanism, the reversing transmission shaft and spline shaft of the reversing mechanism, and the crank support of the crank rocker backrest mechanism are all installed on the box and support plate of the tricycle carrier.

2. The waist swing drive tricycle according to claim 1, characterized in that The crank-rocker backrest mechanism is based on the crank shaft and the crank rotating pin, and is connected to the backrest rotating pin through the crank rotating pin. The crank, connecting rod, and swinging backrest constitute the crank-rocker mechanism. The first-stage driving bevel gear and the crank are both fixed to the crank shaft. The first-stage driving bevel gear and the first-stage driven bevel gear are meshed. One end of the elastic tension rope is fixed to one side of the swinging backrest.

3. The waist swing drive tricycle according to claim 1, characterized in that The right ratchet is installed between the right ratchet bevel gear and the double ratchet shaft, and the left ratchet is installed between the left ratchet bevel gear and the double ratchet shaft. The right ratchet ensures that the right ratchet bevel gear and the double ratchet shaft rotate synchronously clockwise. When rotating counterclockwise, the right ratchet bevel gear rotates idly on the double ratchet shaft. The left ratchet ensures that the left ratchet bevel gear and the double ratchet shaft rotate synchronously clockwise. When rotating counterclockwise, the left ratchet bevel gear rotates idly on the double ratchet shaft. The right ratchet bevel gear and the left ratchet bevel gear are respectively engaged with the double meshing bevel gears. The right ratchet bevel gear and the left ratchet bevel gear have opposite rotation moments, and the double meshing bevel gears are fixed to the double bevel gear shaft.

4. The waist swing drive tricycle according to claim 1, characterized in that The described reversing mechanism mainly consists of a front and rear gear shift fork, an upper bevel gear, a reversing transmission shaft, a lower bevel gear, a double-sliding bevel gear, a spline shaft, a driving bevel gear, a locking groove and a support frame. Its characteristics are that the double-sliding bevel gear is a double-sliding bevel gear with a spline groove inside, and the spline shaft is a spline shaft. The double-sliding bevel gear is assembled on the spline shaft and can move left and right on the spline shaft. The snap ring of the front and rear gear shift fork is sleeved on the double-sliding bevel gear and can rotate freely on the double-sliding bevel gear. The front and rear gear shift fork consists of a snap ring, a tension spring, a front and rear gear shift fork sleeve, a front and rear gear shift fork rod and a hook. The hook and the snap ring are respectively fixed at both ends of the front and rear gear shift fork. The front and rear gear shift fork rod can move in the front and rear gear shift fork sleeve. Both ends of the tension spring are respectively connected to the front and rear gear shift fork sleeve and the front and rear gear shift fork rod. The tension spring makes the hook at the front section of the front and rear gear shift fork closely lean against the groove of the locking groove. There are three grooves in the locking groove, and the three grooves respectively lock the front and rear gear shift fork in the left, middle and right three positions. When the front and rear gear shift fork is locked in the left end position, the right end bevel gear of the double-sliding bevel gear meshes with the right end teeth of the lower bevel gear. When the front and rear gear shift fork is locked in the right end position, the left end bevel gear of the double-sliding bevel gear meshes with the left end teeth of the lower bevel gear. When the front and rear gear shift fork is locked in the middle position, neither the left end bevel gear nor the right end bevel gear of the double-sliding bevel gear meshes with the lower bevel gear. The upper bevel gear and the lower bevel gear are respectively fixed at the upper and lower ends of the reversing transmission shaft. The upper bevel gear meshes with the driving bevel gear. The front and rear gear shift fork is supported and guided by the support frame.

5. A waist swing-driven tricycle according to claim 1, characterized in that The described tricycle carrier mainly consists of a handlebar, a seat, a support plate, a vehicle support frame, a front wheel, a right wheel, a box body and a left wheel. The support plate is fixed inside the box body. The handlebar is installed on the front wheel. The seat is fixed on the vehicle support frame. The vehicle support frame is fixed to the box body and is supported by the front wheel, the right wheel and the left wheel.

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