CN216497279U

CN216497279U - Small compact exercise bicycle

Info

Publication number: CN216497279U
Application number: CN202122206665.6U
Authority: CN
Inventors: 郑文豪
Original assignee: Zhejiang Arcana Power Sports Tech Co Ltd
Current assignee: Zhejiang Arcana Power Sports Tech Co Ltd
Priority date: 2021-09-13
Filing date: 2021-09-13
Publication date: 2022-05-13
Anticipated expiration: 2031-09-13

Abstract

The utility model relates to the technical field of fitness equipment, in particular to a small and compact exercise bicycle. Including the frame, its characterized in that: the frame is an integrally formed plastic frame injected by a mold, the peripheral wall of the frame is enclosed to form a mounting groove, and a secondary transmission mechanism is mounted on the mounting groove; the secondary transmission mechanism includes: the flywheel and the large belt pulley are coaxially arranged and erected on the front side of the frame, and the small belt pulley is erected on the rear side of the frame, and the flywheel and the large belt pulley are in transmission connection with each other through a belt and the small belt pulley respectively; the shaft is a flywheel shaft, and the flywheel shaft are not linked in the circumferential direction. Among the above-mentioned technical scheme, change traditional welding iron stand into integrated into one piece's plastic frame, the whole modularization of frame, the precision is high, and manufacturing cost is lower than the iron stand relatively, and its material is more environmental protection. In addition, when the flywheel shaft rotates, the large belt pulley rotates to drive the small belt pulley to rotate, and the small belt pulley rotates to drive the flywheel to rotate, so that secondary transmission is realized.

Description

Small compact exercise bicycle

Technical Field

The utility model relates to the technical field of fitness equipment, in particular to a small and compact exercise bicycle.

Background

The exercise bicycle is called a power bicycle in the field of sports science, and is divided into two types, namely a vertical type exercise bicycle and a back-to-back type exercise bicycle (also called a horizontal type exercise bicycle), and the strength (power) of the exercise bicycle can be adjusted to achieve the effect of exercise, so that the exercise bicycle is called as an exercise bicycle.

Exercise bicycles are a typical aerobic exercise machine that simulates outdoor exercise and is also known as a cardiopulmonary exercise machine. It is mainly used for promoting cardiovascular movement, accelerating metabolism, and enhancing heart and lung functions by exercising for a long time and with proper intensity, thereby improving the constitution of human body.

The frame fixing structure of most of the existing exercise bicycles adopts an iron frame welding mode, and has the advantages of high cost, heaviness, large volume, high daily maintenance cost and more complicated manufacturing process.

Disclosure of Invention

In order to solve the problems, the utility model aims to provide a small and compact exercise bicycle, the frame of which is integrally formed, and the small and compact exercise bicycle has the advantages of small volume, high precision, low cost, more environment-friendly materials and lighter whole body; in order to fit the frame, a secondary transmission mechanism is arranged in the frame, and the secondary transmission mechanism can increase the resistance of the rotating flywheel and achieve a better body-building effect.

In order to achieve the purpose, the utility model adopts the following technical scheme: including the frame, its characterized in that: the frame is an integrally formed plastic frame injected by a mold, the peripheral wall of the frame is enclosed to form a mounting groove, and a secondary transmission mechanism is mounted on the mounting groove;

the secondary transmission mechanism includes: the flywheel and the large belt pulley are coaxially arranged and erected on the front side of the frame, and the small belt pulley is erected on the rear side of the frame, and the flywheel and the large belt pulley are in transmission connection with each other through a belt and the small belt pulley respectively; the shaft is a flywheel shaft, and the flywheel shaft are not linked in the circumferential direction.

Among the above-mentioned technical scheme, change traditional welding iron stand into integrated into one piece's plastic frame, the whole modularization of frame, the precision is high, and manufacturing cost is lower relatively the iron stand, and its material is more environmental protection, and in addition, the volume is littleer than the iron stand, is convenient for accomodate, and whole weight is lighter, does benefit to the transport. In addition, in this small and compact frame, in order to realize good transmission effect, set up flywheel and big belt pulley coaxially, improve space utilization, stability is also good, when the flywheel shaft rotates, big belt pulley rotates and drives the belt lace wheel and rotate, and the rotation of belt lace wheel drives the flywheel and rotates, thereby realize secondary drive, wherein, exercise bicycle drive mechanism conventional settings be big belt pulley drive flywheel can, and the belt lace wheel that adds to establish is smaller, then big belt pulley input improves with the output speed ratio of output of flywheel, the resistance grow, colloquially, originally, directly drive the flywheel and rotate by big belt pulley, now drive the flywheel by belt lace wheel and rotate, then need the belt lace wheel to rotate very many circles just can realize a round flywheel and rotate, the resistance greatly increases, thereby realize better body-building effect.

Preferably, the frame comprises: the frame comprises a base arranged along the length direction of the frame, two support frames arranged on the base at intervals along the length direction of the frame, a rear guard plate fixedly connected with a bottom plate and the rear ends of the support frames, and a front guard plate fixedly connected with the upper end surface of the bottom plate and the front ends of the support frames;

the upper end surface of the support frame is a trapezoidal surface and comprises a transverse surface and two inclined surfaces, the transverse surface of the support frame is downwards sunken to form a U-shaped erection opening, and a flywheel shaft of the flywheel is erected in the erection opening;

a plurality of positioning openings are formed in the rear side of the supporting frame along the width direction of the supporting frame, a belt shaft is inserted into the small belt pulley, and two ends of the belt shaft of the small belt pulley are erected in the positioning openings.

In the technical scheme, the flywheel shaft and the belt shaft are arranged on the support frame in an inserting mode, and the flywheel, the large belt pulley and the small belt pulley are partially sunk into the mounting groove enclosed by the frame, so that the mounting volume is greatly reduced, and the whole body is more exquisite; in addition, the trapezoidal face in upper end of support frame does not influence under the condition of secondary drive mechanism installation, reduces the frame volume, makes it more light.

Preferably, the inner wall of the support frame is a continuous surface, the outer wall of the support frame is in a grid shape, the support frame comprises a U-shaped erection opening and a grid area, reinforcing ribs are constructed in the grid area and comprise a plurality of arc-shaped reinforcing plates and straight reinforcing plates connected with the arc-shaped reinforcing plates, and the arc-shaped reinforcing plates and the bottom cambered surface of the U-shaped erection opening are concentrically and radially arranged in a diffusion manner; the reinforcing rib still includes the straight shape reinforcing plate of polylith to and set up the circular location mouth at the straight shape reinforcing plate intersection of polylith, be equipped with in the circular location mouth and hold the circular passageway that the belt axle passes through. Among the above-mentioned technical scheme, the setting of arc reinforcing plate and straight reinforcing plate, under its modularization, the prerequisite of high accuracy, greatly increased the intensity and the toughness of support frame, make its support performance good, can bear great pressure, in addition, so set up, make exercise bicycle when using, whole more stable, noise abatement.

Preferably, the edge of the shaft hole of the flywheel extends outwards to form a first belt pulley for hanging a belt, a first blocking wall is arranged in the shaft hole of the flywheel in the circumferential direction, two first bearings sleeved on the shaft of the flywheel are arranged in the shaft hole, the two first bearings are positioned at two sides of the first blocking wall, the circumferential wall is abutted against the inner wall of the hole, and the inner end surface is abutted against the first blocking wall; a plurality of annular grooves are axially formed in the flywheel shaft, a plurality of C-shaped buckles are clamped in the annular grooves, and the two C-shaped buckles respectively abut against the outer end faces of the two first bearings from two sides of the shaft hole. In the technical scheme, the bearing is arranged in the shaft hole of the flywheel and is used for reducing friction and ensuring the rotation precision of the flywheel, so that the reason why the flywheel is not linked with the flywheel shaft in the circumferential direction is provided; in addition, two bearings are arranged in the shaft hole, so that the supporting precision and the rotation precision of the flywheel are better, and meanwhile, two end faces of the two bearings are abutted against each other, so that the axial shaking of the bearings is prevented, and the axial swinging of the flywheel is further prevented.

Preferably, the bottom of the U-shaped erection opening is fixedly provided with an arc-shaped clamping groove, and both sides of the upper end of the erection opening extend to the transverse surface of the support frame and are provided with positioning holes; mounting modules are respectively sleeved on two sides of the flywheel shaft, so that the large belt pulley and the flywheel are positioned between the two mounting modules, and the large belt pulley and the flywheel shaft are integrally formed; the mounting module is correspondingly mounted in a U-shaped erection opening on the frame and comprises a clamping sleeve and a second bearing, the lower end of the clamping sleeve extends upwards to form an arc avoidance opening, the upper end of the bearing is embedded into the lower end of the clamping sleeve, and the bearing is clamped between adjacent C-shaped buckles on the outer side of the shaft hole; the lower end of the bearing is embedded into the arc-shaped clamping groove, and two side frames at the upper end of the clamping sleeve are arranged on the supporting frame and are matched and fixedly connected with the positioning hole. In the technical scheme, the large belt pulley and the flywheel shaft are integrally formed, so that the large belt pulley also rotates when the flywheel shaft rotates. The installation module is arranged to indirectly fix the flywheel shaft on the support frame, so that the installation of the large belt pulley and the flywheel is indirectly realized; in the arc draw-in groove was gone into to the bearing lower extreme card of installation module, the upper end was pushed down by the cutting ferrule, and the center is detained both sides by C shape again and is carried, prevents bearing axial displacement, uses the bearing here to go to connect the frame, because the flywheel shaft needs the pivoted, the setting of bearing is most suitable. In addition, the upper part of the installation module is sleeved with the clamping sleeve which is pressed downwards, the clamping sleeve is fixed on the support frame, and the lower end of the clamping sleeve is embedded into the bearing which cannot move axially, so that the installation module is firmly locked in the U-shaped erection opening of the support frame, and the flywheel shaft is inserted on the installation module, so that the installation module cannot move axially, and the rotation precision of the large belt pulley and the flywheel is ensured.

Preferably, the edge of the shaft hole of the small belt pulley extends outwards to form a second belt pulley disc for hanging a belt, a second blocking wall is arranged in the shaft hole in the circumferential direction, two third bearings sleeved on the belt shaft are arranged in the shaft hole, the two third bearings are positioned on two sides of the second blocking wall, the circumferential wall is abutted against the inner wall of the hole, and the inner end surface is abutted against the second blocking wall;

sleeves are respectively sleeved on two sides of the small belt pulley on the belt shaft, the inner ends of the sleeves abut against the outer end face of the third bearing, and the outer ends of the sleeves abut against the inner wall; the two ends of the belt shaft are screwed with bolts, each bolt comprises a nut and a screw rod, a blocking piece is sleeved on each screw rod and abutted to the corresponding nut, the bolts are screwed into the end portions of the belt shaft, and the blocking pieces are abutted to the outer end edges of the outer wall/circular channel of the support frame. Among this technical scheme, the bearing installation in the belt shaft hole is the same with in the flywheel shaft hole, just supports the outer terminal surface of bearing and has become the sleeve by C shape knot, and telescopic outer end supports the frame, because belt lace wheel's rotational speed is higher, uses sleeve butt bearing more reliable, more stable when making belt lace wheel rotate. In addition, the bolt and the blocking piece lock the belt shaft and prevent the belt shaft from axially disengaging.

Preferably, the vehicle body further comprises a pre-tightening bearing, the pre-tightening bearing is arranged between the small belt pulley and the large belt pulley and is abutted against one section of the belt, and the pre-tightening bearing is clamped on the vehicle frame, can rotate in the circumferential direction and does not move in the axial direction. In the technical scheme, the pre-tightening bearing is arranged to tighten the belt, so that the abrasion of the belt can be reduced, and the belt transmission is smoother.

Preferably, still include the magnetite subassembly, the one end and the frame of magnetite subassembly are articulated, and the other end and haulage rope traction connection, the magnetite subassembly includes the arc to and the fixed polylith magnetite that sets up on the arc, the arc surface that the arc corresponds the flywheel sets up in the outer edge of flywheel. Among this technical scheme, the arc can be followed the hinged end pivoted on the frame, because be provided with the magnetite on the arc, when its rotation is close to the flywheel, the flywheel resistance grow is suitable for the high strength and tempers, when its rotation is kept away from the flywheel, the flywheel resistance diminishes, is suitable for mild training.

Drawings

Fig. 1 is a schematic perspective view of a compact exercise bicycle.

Fig. 2 is a schematic perspective view of a frame of a compact exercise bicycle.

Fig. 3 is a schematic perspective view of the secondary transmission mechanism of a compact exercise bicycle.

Fig. 4 is another perspective view of the secondary drive mechanism of a compact exercise bicycle.

Fig. 5 is a schematic top view of the secondary drive mechanism of a compact exercise bicycle.

Fig. 6 is a schematic side view of the secondary drive mechanism of a compact exercise bicycle.

Fig. 7 is a side view of a compact exercise bicycle frame.

Fig. 8 is a perspective view of the flywheel and flywheel shaft assembly of a compact exercise bicycle.

Fig. 9 is a perspective view of the flywheel of a compact exercise bicycle.

Figure 10 is an assembly view of another perspective of a compact exercise bicycle.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

A compact exercise bicycle, as shown in fig. 1-10, comprising a frame 1, characterized in that: the frame 1 is an integrally formed plastic frame injected through a mold, the peripheral wall of the frame 1 is enclosed to form a mounting groove, and a secondary transmission mechanism is mounted on the mounting groove; this secondary drive mechanism includes: the flywheel 2 and the large belt pulley 3 are coaxially arranged and erected on the front side of the frame 1, and the small belt pulley 5 is erected on the rear side of the frame 1, and the flywheel 2 and the large belt pulley 3 are in transmission connection with each other through a belt 4 and the small belt pulley 5; the shaft is a flywheel shaft 6, and the flywheel 2 is not linked with the flywheel shaft 6 in the circumferential direction. Among this technical scheme, changing traditional welding iron stand into integrated into one piece's plastic frame, the whole moduleization of frame 1, the precision is high, and manufacturing cost is lower than the iron stand relatively, and its material is more environmental protection, and in addition, the volume is littleer than the iron stand, is convenient for accomodate, and whole weight is lighter, does benefit to the transport. In addition, in the small and compact vehicle frame 1, in order to realize good transmission effect, the flywheel 2 and the large belt pulley 3 are coaxially arranged, the space utilization rate is improved, the stability is good, when the flywheel shaft 6 rotates, the large belt pulley 3 rotates to drive the small belt pulley 5 to rotate, and the small belt pulley 5 rotates to drive the flywheel 2 to rotate, so that secondary transmission is realized, wherein, the conventional arrangement of the transmission mechanism of the exercise bicycle is that a large belt pulley 3 drives a flywheel 2, and a small belt pulley 5 is additionally arranged to be smaller, the rotation speed ratio of the input end of the large belt pulley 3 to the output end of the flywheel 2 is increased, the resistance is increased, in a popular way, the flywheel 2 is directly driven by the large belt pulley 3 to rotate, the flywheel 2 is driven by the small belt pulley 5 to rotate, the small belt pulley 5 is required to rotate for a plurality of circles to realize the rotation of the flywheel 2 for one circle, so that the resistance is greatly increased, and a better body building effect is realized.

Further, the vehicle frame 1 includes: the frame comprises a base 7 arranged along the length direction of the frame 1, two support frames 8 arranged on the base 7 at intervals along the length direction of the frame 1, a rear protection plate 9 fixedly connected with a bottom plate and the rear ends of the support frames 8, and a front protection plate 10 fixedly connected with the upper end surface of the bottom plate and the front ends of the support frames 8; the upper end surface of the support frame 8 is a trapezoidal surface and comprises a transverse surface and two inclined surfaces, the transverse surface of the support frame 8 is downwards sunken to form a U-shaped erection opening 11, and the flywheel shaft 6 of the flywheel 2 is erected in the erection opening 11; a plurality of positioning openings 12 are formed in the rear side of the support frame 8 along the width direction of the support frame 8, a belt shaft 13 is inserted into the small belt pulley 5, and two ends of the belt shaft 13 of the small belt pulley 5 are erected in the positioning openings 12. In the technical scheme, the flywheel shaft 6 and the belt shaft 13 are arranged on the support frame 8 in a penetrating way, and the flywheel 2, the large belt pulley 3 and the small belt pulley 5 are partially sunk into the mounting groove enclosed by the frame 1, so that the mounting volume is greatly reduced, and the whole body is more exquisite; in addition, the trapezoidal surface in upper end of support frame 8 reduces frame 1 volume under the condition that does not influence the installation of secondary drive mechanism, makes it more light.

Furthermore, the inner wall of the support frame 8 is a continuous surface, the outer wall is in a grid shape, the support frame 8 comprises a U-shaped erection opening 11 and a grid area, reinforcing ribs are built in the grid area, and each reinforcing rib comprises a plurality of arc-shaped reinforcing plates 14 and a straight reinforcing plate 15 connected with the arc-shaped reinforcing plates 14; the arc-shaped reinforcing plates 14 and the bottom cambered surface of the U-shaped erection opening 11 are concentrically and radially arranged in a diffused manner; the reinforcing rib further comprises a plurality of straight reinforcing plates 15 and a circular positioning opening 12 arranged at the intersection of the plurality of straight reinforcing plates 15, and a circular channel 16 for allowing the belt shaft 13 to pass through is arranged in the circular positioning opening 12. Among the above-mentioned technical scheme, the setting of arc reinforcing plate 14 and straight reinforcing plate 15, under its modularization, the prerequisite of high accuracy, greatly increased the intensity and the toughness of support frame 8, make its support performance good, can bear great pressure, in addition, so set up, make exercise bicycle when using, whole more stable, noise abatement.

Furthermore, the edge of the shaft hole of the flywheel 2 extends outwards to form a first belt pulley 17 for hanging the belt 4, a first blocking wall 18 is arranged in the shaft hole of the flywheel 2 in the inner circumferential direction, two first bearings 19 which are sleeved on the flywheel shaft 6 are arranged in the shaft hole, the two first bearings 19 are positioned at two sides of the first blocking wall 18, the circumferential wall is abutted against the inner wall of the hole, and the inner end surface is abutted against the first blocking wall 18; a plurality of annular grooves 20 are axially formed in the flywheel shaft 6, a plurality of C-shaped buckles 21 are clamped in the annular grooves 20, and two C-shaped buckles 21 respectively abut against the outer end faces of the two first bearings 19 from two sides of the shaft hole. In the technical scheme, the bearing is arranged in the shaft hole of the flywheel 2 and is used for reducing friction and ensuring the rotation precision of the flywheel 2, so that the reason why the flywheel 2 is not linked with the flywheel shaft 6 in the circumferential direction is provided; in addition, two bearings are arranged in the shaft hole, so that the supporting precision and the rotation precision of the flywheel 2 are better, and meanwhile, two end faces of the two bearings are abutted against each other, so that the axial shaking of the bearings is prevented, and the axial swinging of the flywheel 2 is further prevented.

Furthermore, an arc-shaped clamping groove 22 is fixedly arranged at the bottom of the U-shaped erection opening 11, and positioning holes 23 are arranged on the transverse surface of the support frame 8, which extends from two sides of the upper end of the erection opening 11; mounting modules are respectively sleeved on two sides of the flywheel shaft 6 to enable the large flywheel belt pulley 3 and the flywheel 2 to be positioned between the two mounting modules, and the large flywheel belt pulley 3 and the flywheel shaft 6 are integrally formed; the mounting module is correspondingly mounted in the U-shaped erection opening 11 on the frame 1 and comprises a clamping sleeve 24 and a second bearing 25, the lower end of the clamping sleeve 24 extends upwards to form an arc avoidance opening, the upper end of the second bearing 25 is embedded into the lower end of the clamping sleeve 24, and the second bearing 25 is clamped between adjacent C-shaped buckles 21 on the outer side of the shaft hole; the lower end of the second bearing 25 is embedded into the arc-shaped clamping groove 22, and two side frames at the upper end of the clamping sleeve 24 are arranged on the support frame 8 and are matched and fixedly connected with the positioning hole 23.

In the technical scheme, the large belt pulley 3 and the flywheel shaft 6 are integrally formed, so that the large belt pulley 3 rotates when the flywheel shaft 6 rotates. The installation module is arranged for indirectly fixing the flywheel shaft 6 on the support frame 8, so that the installation of the large belt pulley 3 and the flywheel 2 is indirectly realized; the bearing lower extreme card of installation module is gone into in arc draw-in groove 22, and the upper end is pushed down by the cutting ferrule, and the center is detained 21 both sides by the C shape again and is carried, prevents bearing axial displacement, uses the bearing here to connect the frame, because flywheel shaft 6 needs the pivoted, and the setting of bearing is most suitable. In addition, the clamping sleeve 24 is sleeved on the upper portion of the mounting module and pressed downwards, the clamping sleeve 24 is fixed on the support frame 8, and the lower end of the clamping sleeve is embedded into the bearing incapable of axially moving, so that the mounting module is firmly locked in the U-shaped erection opening 11 of the support frame 8, the flywheel shaft 6 is inserted into the mounting module, the mounting module cannot axially move, and the rotation accuracy of the large belt pulley 3 and the flywheel 2 is guaranteed.

Furthermore, the edge of the shaft hole of the small belt pulley 5 extends outwards to form a second belt pulley disc 26 for hanging the belt 4, a second blocking wall is arranged in the inner circumference of the shaft hole, two third bearings 27 sleeved on the belt shaft 13 are arranged in the shaft hole, the two third bearings 27 are arranged at two sides of the second blocking wall, the circumferential wall is abutted against the inner wall of the hole, and the inner end surface is abutted against the second blocking wall; on the belt shaft 13, sleeves 28 are respectively sleeved on two sides of the small belt pulley 5, the inner ends of the sleeves 28 abut against the outer end face of the third bearing 27, and the outer ends of the sleeves 28 abut against the inner wall of the support frame 8; the both ends of belt axle 13 are twisted and are equipped with the bolt, including nut 30 and screw rod, and the cover is equipped with separation blade 31 on the screw rod and with the butt of nut 30, the tip of bolt twist belt axle 13, separation blade 31 butt in the outer end edge of the outer wall of support frame 8 circular passageway 16. Among this technical scheme, the bearing installation in 13 shaft holes of belt axle is same in 6 shaft holes with the flywheel shaft, just supports bearing outer terminal surface and has become sleeve 28 by C shape knot, and sleeve 28's outer end supports frame 1, because the rotational speed of belt lace wheel 5 is higher, uses sleeve 28 butt bearing more reliable, and is more stable when making belt lace wheel 5 rotate. In addition, the bolt and the stopper 31 lock the belt shaft 13 and prevent the belt shaft 13 from being axially disengaged.

Further, the exercise bicycle further comprises a pre-tightening bearing 32, the pre-tightening bearing 32 is arranged between the small belt pulley 5 and the large belt pulley 3 and is abutted against one section of the belt 4, and the pre-tightening bearing 32 is clamped and arranged on the frame 1, can rotate in the circumferential direction and does not move in the axial direction. In this technical scheme, the setting of pretension bearing 32 makes in order to make belt 4 tighten, and can reduce the wearing and tearing of belt 4, makes belt 4 transmission more smooth and easy. It should be noted here that a wheel shaft is inserted in the circular channel between the small belt pulley 5 and the large belt pulley 3, a baffle 37 is integrally formed at an end of the wheel shaft, a sleeve B36 is sleeved on the wheel shaft, one end of the sleeve B36 abuts against the baffle 37, the other end abuts against the inner wall of the support 8, a C-shaped buckle is arranged on the sleeve B36, the pre-tightening bearing 32 is sleeved on the sleeve B36, and two end faces abut against the baffle 37 and the C-shaped buckle respectively.

Further, this exercise bicycle still includes the magnetite subassembly, and the one end and the frame 1 of magnetite subassembly are articulated, and the other end pulls with the haulage rope and is connected, and the magnetite subassembly includes arc 33 to and the fixed polylith magnetite that sets up on arc 33, the arc surface that arc 33 corresponds flywheel 2 sets up in the outer edge of flywheel 2. Among this technical scheme, arc 33 can be followed the hinged end pivoted on the frame 1, because be provided with magnetite 34 on the arc 33, when it rotates and is close to flywheel 2, the 2 resistance grow of flywheel is suitable for the high strength and tempers, when it rotates and keeps away from flywheel 2, the flywheel resistance diminishes, is suitable for light training.

In this embodiment, the pedal is installed on the square tube 35, the input end of the pedal is hinged to the flywheel shaft 6, when the pedal is treaded, the flywheel shaft 6 rotates to drive the large belt pulley 3 to rotate, then the small belt pulley 5 rotates, and finally the flywheel 2 is driven to rotate, so that the exercise bicycle runs. In the exercise bicycle, the frame 1 is an integrally injection-molded plastic frame, and has the characteristics of modularization, high precision, low cost, environmental protection, small volume and more portability, and the secondary transmission mechanism is arranged in the frame 1, so that the space is reasonably utilized, the resistance can be increased, and the exercise effect is better.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.

Claims

1. A small compact exercise bike comprising a frame (1) characterized in that: the frame (1) is an integrally formed plastic frame which is injected and molded through a mold, the peripheral wall of the frame (1) is enclosed to form an installation groove, and a secondary transmission mechanism is installed on the installation groove;

the secondary transmission mechanism includes: the flywheel (2) and the large belt pulley (3) are coaxially arranged and erected on the front side of the frame (1), and the small belt pulley (5) is erected on the rear side of the frame (1), and the flywheel (2) and the large belt pulley (3) are in transmission connection with each other through a belt (4) and the small belt pulley (5); the shaft is a flywheel shaft (6), and the flywheel (2) is not linked with the flywheel shaft (6) in the circumferential direction.

2. A compact exercise bicycle according to claim 1, wherein: the frame (1) comprises: the bicycle frame comprises a base (7) arranged along the length direction of the bicycle frame (1), two supporting frames (8) arranged on the base (7) at intervals along the length direction of the bicycle frame (1), a rear protection plate (9) fixedly connected with a bottom plate and the rear ends of the supporting frames (8), and a front protection plate (10) fixedly connected with the upper end surface of the bottom plate and the front ends of the supporting frames (8);

the upper end surface of the support frame (8) is a trapezoidal surface and comprises a transverse surface and two inclined surfaces, the transverse surface of the support frame (8) is downwards sunken to form a U-shaped erection opening (11), and a flywheel shaft (6) of the flywheel (2) is erected in the erection opening (11);

a plurality of locating openings (12) have been seted up along the width direction of support frame (8) to the rear side of support frame (8), it is equipped with belt shaft (13) to insert on belt lace wheel (5), erect at the both ends of belt shaft (13) of belt lace wheel (5) in locating opening (12).

3. A compact exercise bicycle according to claim 2, wherein: the inner wall of the support frame (8) is a continuous surface, the outer wall of the support frame (8) is in a grid shape, the support frame (8) comprises a U-shaped erection opening (11) and a grid area, reinforcing ribs are built in the grid area and comprise a plurality of arc-shaped reinforcing plates (14) and straight reinforcing plates (15) connected with the arc-shaped reinforcing plates (14), and the arc-shaped reinforcing plates (14) and the bottom cambered surface of the U-shaped erection opening (11) are concentrically and radially arranged in a diffusion mode;

the reinforcing rib still includes polylith reinforcing plate (15) that directly appears to and set up circular location mouth (12) in polylith reinforcing plate (15) intersection, be equipped with in circular location mouth (12) and hold circular passageway (16) that belt axle (13) passed through.

4. A compact exercise bicycle according to claim 2, wherein: the edge of the shaft hole of the flywheel (2) extends outwards to form a first belt pulley (17) for hanging a belt (4), a first blocking wall (18) is arranged in the shaft hole of the flywheel (2) in the circumferential direction, two first bearings (19) sleeved on the flywheel shaft (6) are arranged in the shaft hole, the two first bearings (19) are positioned on two sides of the first blocking wall (18), the circumferential wall abuts against the inner wall of the hole, and the inner end face abuts against the first blocking wall (18); a plurality of annular grooves (20) are axially formed in the flywheel shaft (6), a plurality of C-shaped buckles (21) are clamped in the annular grooves (20), and two C-shaped buckles (21) respectively abut against the outer end faces of the two first bearings (19) from two sides of the shaft hole.

5. A compact exercise bicycle according to claim 4, wherein: an arc-shaped clamping groove (22) is fixedly arranged at the bottom of the U-shaped erection opening (11), and positioning holes (23) are formed in the transverse surface of the upper end of the erection opening (11) extending to the support frame (8); mounting modules are respectively sleeved on two sides of the flywheel shaft (6) to enable the large belt pulley (3) and the flywheel (2) to be located between the two mounting modules, and the large belt pulley (3) and the flywheel shaft (6) are integrally formed; the mounting module is correspondingly mounted in a U-shaped erection opening (11) on the frame (1) and comprises a clamping sleeve (24) and a second bearing (25), the lower end of the clamping sleeve (24) extends upwards to form an arc avoidance opening, the upper end of the second bearing (25) is embedded into the lower end of the clamping sleeve (24), and the second bearing (25) is clamped between adjacent C-shaped buckles (21) on the outer side of the shaft hole; the lower end of the second bearing (25) is embedded into the arc-shaped clamping groove (22), and two side frames at the upper end of the clamping sleeve (24) are arranged on the support frame (8) and are matched and fixedly connected with the positioning hole (23).

6. A compact exercise bicycle according to claim 2, wherein: the edge of the shaft hole of the small belt pulley (5) extends outwards to form a second belt pulley disc (26) for hanging the belt (4), a second blocking wall is arranged in the shaft hole in the circumferential direction, two third bearings (27) sleeved on the belt shaft (13) are arranged in the shaft hole, the two third bearings (27) are positioned on two sides of the second blocking wall, the circumferential wall abuts against the inner wall of the hole, and the inner end face abuts against the second blocking wall;

sleeves (28) are respectively sleeved on two sides of the small belt pulley (5) on the belt shaft (13), the inner ends of the sleeves (28) abut against the outer end face of the third bearing (27), and the outer ends of the sleeves (28) abut against the inner wall of the support frame (8); the two ends of the belt shaft (13) are screwed with bolts and comprise nuts (30) and screw rods, blocking pieces (31) are sleeved on the screw rods and abutted to the nuts (30), the bolts are screwed into the end portions of the belt shaft (13), and the blocking pieces (31) are abutted to the outer end edges of the outer wall/circular channel (16) of the support frame (8).

7. A compact exercise bicycle according to claim 1, wherein: the belt conveyor is characterized by further comprising a pre-tightening bearing (32), wherein the pre-tightening bearing (32) is arranged between the small belt pulley (5) and the large belt pulley (3) and is abutted against one section of the belt (4), the pre-tightening bearing (32) is clamped and arranged on the frame (1), and the pre-tightening bearing can rotate in the circumferential direction and does not move in the axial direction.

8. A compact exercise bicycle according to claim 1, wherein: still include the magnetite subassembly, the one end and the frame (1) of magnetite subassembly are articulated, and the other end and haulage rope traction are connected, the magnetite subassembly includes arc (33) to and the fixed polylith magnetite that sets up on arc (33), the arc surface that corresponds flywheel (2) in arc (33) sets up in the outer edge of flywheel (2).