A wheel capable of being adjusted positively and negatively and a rear-drive fitness vehicle using the wheel

Abstract

The utility model provides a wheel capable of positive and negative adjustment and a rear-drive fitness bike using the wheel. A positive clamping hole is provided at the axis center of an inner belly plate, and a negative clamping hole is provided at the edge of the inner belly plate. The positive clamping hole and the negative clamping hole are connected through a slide groove, and an axle is matched and arranged. The axle comprises a clamping portion, a limiting portion and a connecting shaft. The outer peripheral surface of the clamping portion comprises two clamping planes and two clamping arc surfaces. The outer peripheral surface of the limiting portion comprises two limiting planes and two limiting arc surfaces. An anti-rotation structure is matched and fixed on the axle. The wheel is limited by the axle size, and the axle can be fixed in the positive clamping hole or the negative clamping hole, and the wheel becomes a positive axle wheel with the axle located at the axis center or a negative axle wheel with the axle deviating from the axis center. The positive axle wheel is similar to the existing ordinary wheel structure, and can be used by assembling appropriate bearings at both ends of the connecting shaft. The negative axle wheel can be applied to the rear-drive fitness bike developed by the applicant by assembling appropriate bearings at both ends of the connecting shaft.

Description

Technical Field

[0001] The utility model relates to the technical field of wheels, in particular to a wheel capable of performing positive and negative adjustment, and also to a rear-drive fitness vehicle using the wheel. Background Art

[0002] Attached Figure 1 The patented product of a rear-drive fitness bike developed by the applicant (authorization announcement number CN220996639U) is shown, which can effectively exercise and stimulate the cerebellum and improve the overall coordination of the fitness person. It is provided with a foot pedal a, one end of which is connected to the handlebar, and the other end is connected to an elastic sheet b, which is rotatably connected to the non-center of the rear wheel through a bearing. When in use, the fitness person stands on the foot pedal, bends the knees and moves the body's center of gravity downward, forcing the elastic sheet to bend and deform to a large extent, thereby driving the rear wheel to roll forward, then retracts the knees and moves the body's center of gravity upward to drive the elastic sheet to rebound, and drives the rear wheel to continue to roll forward under the action of inertia and rebound force, and these two actions of the knees are performed alternately to achieve continuous driving of the rear wheel of the fitness bike. One end of the elastic sheet of the exercise bike needs to be connected to a non-center portion of the rear wheel. The existing wheel structure cannot meet this connection requirement and requires a more complicated modification. For example, in the above patented product, strips are welded on both sides of the wheel hub, and then fixing rods that pass through the rear wheel spokes are set at the ends of the two plates. Subsequently, bearings are installed on the fixing rods, and then the elastic sheet is connected thereto. This is time-consuming and labor-intensive, and the modified wheel cannot be restored to its original state and used as an ordinary wheel. Utility Model Content

[0003] The purpose of the utility model is to provide a wheel capable of performing positive and negative adjustment, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a wheel capable of positive and negative adjustment, comprising an outer ring and an inner ring arranged coaxially, an outer belly plate arranged between the outer ring and the inner ring, an inner belly plate arranged inside the inner ring, an arc-shaped positive clamping hole opened at the axis of the inner belly plate, an arc-shaped negative clamping hole opened at the edge of the inner belly plate close to the inner ring, the positive clamping hole and the negative clamping hole are connected through a rectangular slide groove, the positive clamping hole and the negative clamping hole have equal diameters, and the slide groove width is smaller than the diameters of the positive clamping hole and the negative clamping hole;

[0005] The inner belly plate is also matched with an axle, the axle includes a clamping part, both ends of the clamping part extend outward to form a limiting part, the ends of the limiting part away from the clamping part extend outward to form a connecting shaft, the diameter of the clamping part is smaller than the diameter of the positive clamping hole and the offset clamping hole and larger than the width of the slide groove, the length of the clamping part is larger than the thickness of the inner belly plate, the diameter of the limiting part is larger than the diameter of the positive clamping hole and the offset clamping hole, and the diameter of the connecting shaft is smaller than the width of the slide groove, the outer peripheral surface of the clamping part is turned to form two relative clamping planes, and the outer peripheral surface of the clamping part between the two clamping planes correspondingly forms two relative clamping arc surfaces, the outer peripheral surface of the limiting part is turned to form two relative limiting planes, and the outer peripheral surface of the limiting part between the two limiting planes forms two relative limiting arc surfaces, the clamping planes correspond to the limiting planes one by one and are smoothly connected, the thickness between the two clamping planes is equal to the thickness between the two limiting planes, and the thickness is smaller than the width of the slide groove;

[0006] The axle is also matched and fixed with an anti-rotation structure. When the axle is clamped in the positive clamping hole or the offset clamping hole, the anti-rotation structure combines with the corresponding limiting holes on the inner belly plate to prevent the axle from rotating relative to the wheel.

[0007] Furthermore, the anti-rotation structure includes a fixed frame, which is sleeved and fixed on one of the two limiting parts. The side wall of the fixed frame is fixed with a flat plate parallel to the inner belly plate through a connecting part. The flat plate is provided with a mounting hole. The mounting hole is matched with a rod-shaped unit that can move close to or away from the inner belly plate and be inserted into or out of the limiting hole.

[0008] Furthermore, a limiting nut is coaxially fixed on the mounting hole, and the rod-shaped unit is a screw rod matching the limiting nut, and the screw rod is screwed into the limiting nut.

[0009] Furthermore, the rod-shaped unit is an automatic latch, and the automatic latch is fixed in the mounting hole.

[0010] Furthermore, two fixing plates on the fixing frame corresponding to the two limiting planes on the limiting part are provided with through holes, and fixing nuts coaxial with the through holes are fixed on the outer sides of the two fixing plates, and fixing screws are matched inside the fixing nuts, and the ends of the fixing screws are tightly against the limiting planes.

[0011] Furthermore, the fixing plate on the fixing frame corresponding to each defined plane is matched with at least two sets of fixing screw and fixing nut combinations.

[0012] Furthermore, a notch is cut at the edge of the outer belly plate, and a hole for the air valve on the tire to pass through is opened on the outer ring corresponding to the notch.

[0013] The utility model also aims to provide a rear-drive fitness bike using the wheel capable of positive and negative adjustment, wherein the elastic sheet of the fitness bike is rotatably connected to the connecting shaft of the axle through a bearing.

[0014] The wheel which can be adjusted positively or negatively is provided with a positive clamping hole, a negative clamping hole and a slide groove connecting the two on the inner belly plate, and also provided with an axle which can slide in the slide groove and be clamped in the positive clamping hole or the negative clamping hole. When the axle is installed or the axle slides in the slide groove, the axle needs to be rotated until its clamping plane and limiting plane are parallel to the side wall of the slide groove. When the axle moves into the positive clamping hole or the negative clamping hole, the axial adjustment is performed to make the position of the axle clamping part match the positive clamping hole or the negative clamping hole, and then the axle is rotated until its clamping plane and limiting plane are perpendicular to the side wall of the slide groove. At this time, due to the limitation of the limiting arc surfaces on both sides of the positive clamping hole or the negative clamping hole, the axle cannot slide out completely in the axial direction. Due to the limitation of the clamping arc surface, the axle cannot slide out of the positive clamping hole or the negative clamping hole in the radial direction. Due to the limitation of the anti-rotation structure fixedly matched on the axle, the axle cannot rotate. At the same time, the existence of the anti-rotation structure can further limit the radial movement of the axle. Through the above multiple limitations, the axle is fixed in the positive clamping hole or the offset clamping hole, and the wheel becomes a positive axle wheel with the axle located at the axis center or an offset axle wheel with the axle deviated from the axis center. The positive axle wheel is similar to the existing ordinary wheel structure and can be used by assembling appropriate bearings at both ends of the connecting shaft. The offset axle wheel can be applied to the rear-wheel drive fitness bike developed by the applicant by assembling appropriate bearings at both ends of the connecting shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of an existing rear-drive fitness bike;

[0016] Figure 2 It is a schematic diagram of the state of the utility model when the axle is fixed in the offset clamping hole and the wheel is an offset wheel with the axle deviating from the axis;

[0017] Figure 3 This is a schematic diagram of the state where the axle of the utility model is located in the slide groove;

[0018] Figure 4 It is a schematic diagram of the state of the utility model when the axle is fixed in the positive clamping hole and the wheel is a positive axle wheel with the axle located at the axis center;

[0019] Figure 5 This is a front view of the axle of the utility model;

[0020] Figure 6 This is a side view of the axle of the utility model;

[0021] Figure 7 for Figure 2 Schematic diagram of the position of the middle axle and the offset hole;

[0022] Figure 8 for Figure 3 Schematic diagram of the position of the middle axle and the slideway;

[0023] Fig. 9 for Figure 4 Schematic diagram of the position of the middle axle and the positive clamping hole;

[0024] Fig.10 This is a schematic diagram of the fixed frame structure of the utility model;

[0025] Fig.11 It is a schematic diagram of the structure of the fixing frame, the flat plate and the limiting nut of the utility model.

[0026] In the figure: 1. outer ring, 2. outer belly plate, 3. inner ring, 4. inner belly plate, 5. positive clamping hole, 6. slide groove, 7. offset clamping hole, 8. notch, 9. tire, 10. air nozzle, 11. clamping arc surface, 12. clamping plane, 13. limiting arc surface, 14. limiting plane, 15. connecting shaft, 16. fixing frame, 17. fixing screw, 18. fixing nut, 19. connecting part, 20. flat plate, 21. mounting hole, 22. limiting nut, 23. limiting hole. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] The wheel capable of positive and negative adjustment described in this embodiment is as follows: Figures 1 to 11 As shown, it comprises an outer ring 1 and an inner ring 3 which are coaxially arranged, an outer belly plate 2 is arranged between the outer ring 1 and the inner ring 3, an inner belly plate 4 is arranged inside the inner ring 3, an arc-shaped positive clamping hole 5 is opened at the axis of the inner belly plate 4, and an arc-shaped offset clamping hole 7 is opened at the edge of the inner belly plate 4 close to the inner ring 3, the positive clamping hole 5 and the offset clamping hole 7 are connected through a rectangular slide 6, the positive clamping hole 5 and the offset clamping hole 7 have the same diameter, and the width of the slide 6 is smaller than the diameter of the positive clamping hole 5 and the offset clamping hole 7;

[0029] The inner belly plate 4 is also matched with an axle, which includes a clamping portion, both ends of the clamping portion extend outward to form a limiting portion, and the ends of the limiting portion away from the clamping portion extend outward to form a connecting shaft 15, the diameter of the clamping portion is smaller than the diameter of the positive clamping hole 5 and the offset clamping hole 7 and larger than the width of the slide groove 6, the length of the clamping portion is larger than the thickness of the inner belly plate 4, the diameter of the limiting portion is larger than the diameter of the positive clamping hole 5 and the offset clamping hole 7, and the diameter of the connecting shaft 15 is smaller than the width of the slide groove 6, the outer peripheral surface of the clamping portion is turned to form two opposite clamping planes 12, and the outer peripheral surface of the clamping portion between the two clamping planes 12 correspondingly forms two opposite clamping arc surfaces 11, the outer peripheral surface of the limiting portion is turned to form two opposite limiting planes 14, and the outer peripheral surface of the limiting portion between the two limiting planes 14 forms two opposite limiting arc surfaces 13, the clamping planes 12 correspond to the limiting planes 14 one by one and are smoothly connected, the thickness between the two clamping planes 12 is equal to the thickness between the two limiting planes 14, and the thickness is smaller than the width of the slide groove 6;

[0030] The axle is also matched with an anti-rotation structure fixed thereon. When the axle is clamped in the positive clamping hole 5 or the offset clamping hole 7, the anti-rotation structure combines with the corresponding limiting hole 23 on the inner belly plate 4 to prevent the axle from rotating relative to the wheel.

[0031] The wheel capable of positive and negative adjustment is provided with a positive clamping hole 5, a negative clamping hole 7 and a slide groove 6 connecting the two on the inner belly plate 4, and an axle which can slide in the slide groove 6 and be clamped in the positive clamping hole 5 or the negative clamping hole 7 is also provided. When the axle is installed or slides in the slide groove 6, Figure 8 As shown, the axle needs to be rotated until its engaging plane 12 and limiting plane 14 are parallel to the side wall of the slide groove 6. When the axle moves into the positive engaging hole 5 or the offset engaging hole 7, the position of the axle engaging portion is adapted to the positive engaging hole 5 or the offset engaging hole 7 through axial adjustment, and then the axle is rotated until its engaging plane 12 and limiting plane 14 are perpendicular to the side wall of the slide groove 6. Figure 7 , 9 As shown, at this time, due to the limitation of the arc surface 13 on both sides of the positive clamping hole 5 or the offset clamping hole 7, the axle cannot completely slide out in the axial direction. In actual use, the length of the clamping part can be made slightly larger than the thickness of the inner belly plate 4 as needed to avoid the excessive length of the clamping part increasing the axial movement of the axle. Due to the limitation of the clamping arc surface 11, the axle cannot slide out of the positive clamping hole 5 or the offset clamping hole 7 in the radial direction. Due to the limitation of the anti-rotation structure fixed on the axle, the axle cannot rotate. At the same time, the existence of the anti-rotation structure can further limit the movement of the axle in the radial direction. Through the above multiple limitations, the axle is fixed in the positive clamping hole 5 or the offset clamping hole 7, and the wheel becomes a positive axle wheel with the axle located at the axis center or an offset axle wheel with the axle deviating from the axis center. The positive axle wheel is similar to the existing ordinary wheel structure and can be used by assembling appropriate bearings at both ends of the connecting shaft 15. The offset axle wheel can be applied to the rear-drive fitness bike developed by the applicant by assembling appropriate bearings at both ends of the connecting shaft 15.

[0032] In the wheel that can be adjusted positively or biased, specifically, the anti-rotation structure includes a fixed frame 16, which is sleeved and fixed on one of the two limiting parts. The side wall of the fixed frame 16 is fixed with a flat plate 20 parallel to the inner belly plate 4 through a connecting part 19. The flat plate 20 is provided with a mounting hole 21. The mounting hole 21 is matched with a rod-shaped unit that can move close to or away from the inner belly plate 4 and insert into or disengage from the limiting hole 23. When anti-rotation restriction is performed, the rod-shaped unit extends downward to move close to the inner belly plate 4 until it extends into the corresponding limiting hole 23 on the inner belly plate 4. When the anti-rotation restriction is released, the rod-shaped unit retracts upward to move away from the inner belly plate 4 until it disengages from the corresponding limiting hole 23 on the inner belly plate 4.

[0033] In the wheel capable of positive and negative adjustment, a limiting nut 22 is coaxially fixed on the mounting hole 21, and the rod-shaped unit is a screw matching the limiting nut 22. The screw is screwed into the limiting nut 22. The screw can be inserted into the limiting hole 23 by being screwed downward, and can be disengaged from the limiting hole 23 by being screwed upward.

[0034] In the wheel capable of performing forward and reverse adjustment, the rod-shaped unit may also be an automatic latch, which is fixed in the mounting hole 21. When the automatic latch pin is ejected, it extends into the corresponding limiting hole 23 on the inner belly plate 4. When the automatic latch pin is retracted, it disengages from the corresponding limiting hole 23 on the inner belly plate 4.

[0035] In the wheel capable of positive and negative adjustment, two fixing plates on the fixing frame 16 corresponding to the two limiting planes 14 on the limiting portion are provided with through holes, and fixing nuts 18 coaxial with the through holes are fixed on the outer sides of the two fixing plates, and a fixing screw 17 is matched inside the fixing nut 18. The fixing screw 17 is screwed through the fixing nut 18 and the through hole so that the end of the fixing screw 17 is tightly against the limiting plane 14, so as to achieve the purpose of fixing the fixing frame 16 and the limiting portion.

[0036] In the wheel capable of positive and negative adjustment, the fixing plate on the fixing frame 16 corresponding to each limiting plane 14 is matched with at least two sets of fixing screws 17 and fixing nuts 18, which can make the fixing sleeve connection effect between the fixing frame 16 and the limiting part better.

[0037] In the wheel capable of being adjusted in the forward and reverse direction, a notch 8 is cut at the edge of the outer belly plate 2, and a hole for the air nozzle 10 on the tire 9 to pass through is opened on the outer ring 1 corresponding to the notch 8.

[0038] The rear-drive exercise bike using the wheel comprises the wheel capable of being adjusted in the positive and negative directions. The elastic sheet of the exercise bike is rotatably connected to the connecting shaft 15 of the axle through a bearing. During assembly, the wheel capable of being adjusted in the positive and negative directions needs to be adjusted to an eccentric wheel in which the axle is fixed in the eccentric clamping hole 7 and the axle deviates from the axis.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A wheel capable of being adjusted in a positive or negative direction, comprising an outer ring (1) and an inner ring (3) arranged coaxially, an outer belly plate (2) being arranged between the outer ring (1) and the inner ring (3), and an inner belly plate (4) being arranged inside the inner ring (3), characterized in that: A circular arc-shaped positive clamping hole (5) is provided at the axis center of the inner belly plate (4), and a circular arc-shaped side clamping hole (7) is provided at the edge of the inner belly plate (4) close to the inner ring (3). The positive clamping hole (5) and the side clamping hole (7) are connected through a rectangular slide groove (6). The diameters of the positive clamping hole (5) and the side clamping hole (7) are equal, and the width of the slide groove (6) is smaller than the diameters of the positive clamping hole (5) and the side clamping hole (7). The inner belly plate (4) is also matched with an axle, the axle includes a clamping portion, both ends of the clamping portion extend outward to form a limiting portion, and the ends of the limiting portion away from the clamping portion extend outward to form a connecting shaft (15). The diameter of the clamping portion is smaller than the diameter of the positive clamping hole (5) and the offset clamping hole (7) and larger than the width of the slide groove (6). The length of the clamping portion is larger than the thickness of the inner belly plate (4). The diameter of the limiting portion is larger than the diameter of the positive clamping hole (5) and the offset clamping hole (7). The diameter of the connecting shaft (15) is smaller than the width of the slide groove (6). The outer peripheral surface of the clamping portion is turned to form two opposite clamping portions. The outer peripheral surface of the clamping portion between the two clamping planes (12) forms two opposite clamping arc surfaces (11), the outer peripheral surface of the limiting portion is turned to form two opposite limiting planes (14), the outer peripheral surface of the limiting portion between the two limiting planes (14) forms two opposite limiting arc surfaces (13), the clamping planes (12) correspond to the limiting planes (14) one by one and are smoothly connected, the thickness between the two clamping planes (12) is equal to the thickness between the two limiting planes (14), and the thickness is less than the width of the slide groove (6); The axle is also matched and fixed with an anti-rotation structure. When the axle is engaged with the positive engagement hole (5) or the offset engagement hole (7), the anti-rotation structure combines with the corresponding limiting hole (23) on the inner belly plate (4) to prevent the axle from rotating relative to the wheel.

2. The wheel capable of positive and negative adjustment according to claim 1, characterized in that: The anti-rotation structure comprises a fixing frame (16), the fixing frame (16) being sleeved and fixed on one of the two limiting parts, a flat plate (20) parallel to the inner belly plate (4) being fixed to the side wall of the fixing frame (16) through a connecting part (19), a mounting hole (21) being provided on the flat plate (20), and a rod-shaped unit capable of moving towards or away from the inner belly plate (4) and being inserted into or out of the limiting hole (23) being matched with the mounting hole (21).

3. The wheel capable of positive and negative adjustment according to claim 2, characterized in that: A limiting nut (22) is coaxially fixed on the mounting hole (21), and the rod-shaped unit is a screw rod matching the limiting nut (22), and the screw rod is screwed into the limiting nut (22).

4. The wheel capable of positive and negative adjustment according to claim 2, characterized in that: The rod-shaped unit is an automatic latch, which is fixed in the mounting hole (21).

5. The wheel capable of positive and negative adjustment according to claim 2, characterized in that: Two fixing plates on the fixing frame (16) corresponding to the two limiting planes (14) on the limiting part are provided with through holes, and fixing nuts (18) coaxial with the through holes are fixed on the outer sides of the two fixing plates, and a fixing screw (17) is matched inside the fixing nut (18), and the end of the fixing screw (17) is tightly against the limiting plane (14).

6. The wheel capable of positive and negative adjustment according to claim 5, characterized in that: The fixing plate on the fixing frame (16) corresponding to each limiting plane (14) is matched with at least two sets of fixing screw rods (17) and fixing nuts (18).

7. The wheel capable of positive and negative adjustment according to claim 1, characterized in that: A notch (8) is cut at the edge of the outer belly plate (2), and a hole for the air nozzle (10) on the tire (9) to pass through is opened on the outer ring (1) corresponding to the notch (8).

8. A rear-drive fitness bike, characterized in that: The invention comprises a wheel capable of positive and negative adjustment as claimed in any one of claims 1 to 7, wherein the elastic sheet of the fitness bike is rotatably connected to the connecting shaft (15) of the axle through a bearing.

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