CN2664728Y

CN2664728Y - Damping arrangement of bicycle exercise device

Info

Publication number: CN2664728Y
Application number: CN 200320104337
Authority: CN
Inventors: 洪万竹
Original assignee: JD Components Co Ltd
Current assignee: JD Components Co Ltd
Priority date: 2003-11-14
Filing date: 2003-11-14
Publication date: 2004-12-22
Anticipated expiration: 2013-11-14

Abstract

The utility model relates to a damping device of bike trainer, which comprises a pivotal piece pivoted in left and right axial direction on the rear of the trainer stent. The pivoted piece surface can bear the leaning of the outer circumference face of the bike rear wheel, which can also be driven by the rear wheel to rotate in place around the pivot point centre in the preset rotation direction. At least one resistance wheel is respectively linked with one end of the pivoted piece. Each resistance wheel comprises one central axis and at least two windproof shields. Each resistance wheel is linked with the pivoted piece through the central axis of the resistance wheel. Each windproof shield is provided with hollowness. The opening of the hollowness of each windproof shield is corresponded to the way of rotating direction above to be arranged on the outer circumference face of the central axis. Thus, a predetermined windage resistance can be generated when the resistance wheel is rotated along the pivoted piece.

Description

The damping unit of bicycle exerciser

Technical field

The utility model relates to bicycle exerciser, particularly about a kind of windage formula damping unit of bicycle exerciser.

Background technology

The bicycle exerciser of commonly using includes the clamping device that a support, that steadily is placed in ground is located at support top usually, and a damping unit of being located at the support rear; But the rear axle of clamping device clamping one bicycle makes trailing wheel can float off ground and rotates freely, and the outer peripheral face of trailing wheel can be resisted against on the pivotal part side face of damping unit.Damping unit is used to produce resistance, forces the bicycle such as the need that are resisted against on the pivotal part to drive trailing wheel, the pedal of the necessary application of force treadled cycle of user, and the damping unit that could drive trailing wheel and bicycle exerciser rotates synchronously, and then reaches the purpose of body-building.

Yet, the damping unit that generally is applied to aforementioned bicycle exerciser mostly is the form of magnetic damping, this kind damping unit cost of manufacture costliness, the price and the cost of bicycle exerciser are promoted, therefore at above-mentioned shortcoming, existing another kind of on the market bicycle exerciser 10 as shown in Figure 1, its characteristic are that damping unit 11 is constituted by two resistance wheels 13 that utilize a pivotal part 12 and be attached at pivotal part 12 two ends.Pivotal part 12 bears the drive of bicycle rear.Two resistance wheels 13 generally are cylindric, and side face is equipped with some blade 14, two resistance wheels 13 with pivotal part 12 axis parallels and rotates synchronously with pivotal part 12, produces the resistance effect by blade 14.By this, reduce the cost of manufacture and the selling price of bicycle exerciser.But because the blade of this kind damping unit is long and narrow, the area that keeps out the wind is little, causes damping unit to produce the poor effect of resistance relatively, makes user's training and motion effect lower.

Summary of the invention

At the problems referred to above, main purpose of the present utility model provides a kind of damping unit of bicycle exerciser, and its cost is lower, and can produce bigger resistance in trampling the process of motion, can allow the user reach the purpose of sport and body-building.

For achieving the above object, the damping unit of bicycle exerciser provided by the utility model includes: a pivotal part, with Y-axis to the support rear that is hubbed on training aids, the outer peripheral face that bicycle rear can be born in the surface of pivotal part against, and can be by trailing wheel drives with predetermined rotation direction along self original place, axle center rotation; At least one resistance wheel is attached at pivotal part one end respectively; Each resistance wheel includes a central shaft and at least two air-resistance covers, and each resistance wheel links by its central shaft and pivotal part; Each air-resistance cover has a recess, and each air-resistance cover is located at the outer peripheral face of central shaft with the mode ring of the corresponding aforementioned direction of rotation of the opening of its recess, makes resistance wheel can produce predetermined windage when rotating with pivotal part.

Description of drawings

Fig. 1 is a kind of stereogram of commonly using bicycle exerciser;

Fig. 2 is the rearview of the utility model one preferred embodiment when being applied to bicycle exerciser;

Fig. 3 is the rearview of the utility model one preferred embodiment;

Fig. 4 is the cutaway view along 4-4 hatching line among Fig. 3, shows that the air-resistance cover of resistance wheel is positioned at inner state;

Fig. 5 is the cutaway view along 5-5 hatching line among Fig. 4;

Fig. 6 is Fig. 4 roughly the same, shows that the air-resistance cover of resistance wheel moves to the state of outer end.

The specific embodiment

Lifting a preferred embodiment and conjunction with figs. below elaborates to structure of the present utility model and function.

As Fig. 2, shown in Figure 3, damping unit 20 for a kind of bicycle exerciser provided by the utility model, be arranged on the pole 2 rear middle positions of bicycle exerciser 1, it consists predominantly of a fixed body 30, two clamshells 40, a pivotal part 50 and two resistance wheels 60, wherein:

Fixed body 30 includes a quarter butt 31 and a support portion 32.Quarter butt 31 is for vertically being fixed in the position of the support 2 rear central authorities of bicycle exerciser 1.Support portion 32 is microscler, with major axis to corresponding to about to mode be connected in quarter butt 31 tops, and support portion 32 be provided with one along its major axis to the groove 33 that is provided with.

Each clamshell 40 is involuted by a general rounded inner cap shell 41 and an enclosing cover shell 42, the combination back has an accommodation space 43 in the inside of each clamshell 40, and the side face of each clamshell 40 be periphery some pore 44, two clamshells 40 be separately fixed at support portion 32 about two ends.

Pivotal part 50 is made up of a pipe 51 and an axostylus axostyle 52.Axostylus axostyle 52 is plugged in the pipe 51, and two ends are exposed at pipe 51 2 ends outward, locks the same side of pipe 51 2 ends by two-screw 53 ecto-entads, and the urgent axostylus axostyle 52 in the bottom of screw 53, and pipe 51 is combined with axostylus axostyle 52, can't do relative motion.But pivotal part 50 utilizes two bearings 54 horizontal in the groove 33 of support portion 32 in the mode of original place rotation, is exposed at outside the support portion 32 outside the top side of pipe 51 outer peripheral faces, and two ends of axostylus axostyle 52 stretch into respectively in the accommodation space 43 of clamshell 40.Thus, when the outer peripheral face that is exposed at support portion 32 outside the pipe 51 bear a bicycle rear against the time, can be driven by trailing wheel and with the direction opposite (among Fig. 4 clockwise) rotation with trailing wheel.

Fig. 4, shown in Figure 5 for another example, each resistance wheel 60 is made up of a central shaft 61, four lateral plates 70 and four air-resistance covers 80.Central shaft 61 is cylindrical, and the side face precalculated position has a screw 62 that radially runs through tube wall.Four lateral plates 70 are microscler tabular, be located on the outer peripheral face of central shaft 61 with the mode ring of isogonism, and each lateral plate 70 are radially extended outward by central shaft 61 outer peripheral faces.Each lateral plate 70 has one and runs through two side faces, and major axis is to the microscler groove 71 vertical with the axle center of central shaft 61, and a locating hole 72 between groove 71 and central shaft 61, and locating hole 72 has screwed togather a bolt 73 and a nut 74.Each air-resistance cover 80 by a base plate 81, be connected in two side plates 82 of positive relative two sides of base plate 81, and an outside plate 83 that connects base plate 81 and two side plates, 82 adjacent same sides simultaneously combines, the inboard of combination back two side plates 82, base plate 81 and outside plate 83 surrounds a recess 84, and be provided with on the dual side-edge of side plate 82 in base plate 81 back side correspondences, be provided with two relative hook parts 85, be provided with simultaneously a perforation 86 that runs through base plate 81 positive and negatives in the centre position of the outer partially plate 83 of base plate 81.

Each air-resistance cover 80 colludes in the mode of slip by two hook parts 85 of base plate 81 and is located on the lateral plate 70, and each air-resistance cover 80 all is arranged on each lateral plate 70 rotation direction same side, by this, each air-resistance cover 80 ring is located at the outer peripheral face of central shaft 61, and there are a bolt 87 and a nut 88 that it is locked on the perforation 86 of each base plate 81, and the head of bolt 87 is arranged in the groove 71 of the lateral plate 70 that base plate 81 fits tightly, and makes each air-resistance cover 80 can only be along 71 restricted portion slippages of groove.In addition, each air-resistance cover 80 also is provided with an extension spring 90, each spring 90 1 end is fixed in bolt 73 tail ends that screw togather on the corresponding lateral plate 70, and the other end is fixed in bolt 87 tail ends of being located at base plate 81, makes air-resistance cover 80 be resisted against the inner of movable scope under normal conditions because of the restoring force of spring 90.

Two resistance wheels 60 are enclosed within axostylus axostyle 52 outer ends of pivotal part 50 respectively by central shaft 61 pivots, and are coated in the accommodation space 43 by clamshell 40.One bolt 63 is screwed in the screw 62 of central shaft 61, and urgent axostylus axostyle 52 surfaces, bolt 63 bottoms, two resistance wheels 60 is combined and rotation synchronously with pivotal part 50.

More than be the composition structure of the damping unit 20 of the bicycle exerciser that the utility model one preferred embodiment provided.When the pivotal part 50 of damping unit 20 bears the trailing wheel of bicycle and rotates thereupon, be positioned at the resistance wheel 60 synchronous turns of pivotal part 50 2 ends, each resistance wheel 60 set air-resistance cover 80 can form the body of disturbing of air-flow, make 60 pairs of bicycle rear spinning forces of each resistance wheel produce opposite resistance, and when speeding up of user's treadled cycle pedal, make the trailing wheel rotation fast more, the rotation of pipe 51 is accelerated, the air-resistance cover 80 of each resistance wheel 60 promptly can be subjected to the influence of centrifugal force, along the groove 71 past outer end slippages (as shown in Figure 6) that are arranged on the lateral plate 70 on the central shaft 61, air-resistance cover 80 to the moment of central shaft 61 is strengthened, increase the resistance that resistance wheel 60 produces.Otherwise when the speed of trampling slows down, air-resistance cover 80 spring 90 that promptly is stretched retracts the inner, and windage is reduced automatically.Two clamshells 40 are located on two resistance wheels 60, when resistance wheel 60 rotations, can avoid producing other people because of contacting injured accident accidentally.

As from the foregoing, utilization is equiped with bicycle exerciser of the present utility model and tramples when training, can reach the purpose of sport and body-building by the resistance that damping unit produces, simultaneously damping unit can be with the increase of the speed of trampling resistance, increase the effect that the user trains muscle by this.In addition, with respect to the form of magnetic damping, damping unit cost of manufacture of the present utility model is cheap, and the cost of whole bicycle exerciser and price are reduced.

Claims

1, a kind of damping unit of bicycle exerciser, described bicycle exerciser includes a support that steadily is placed on ground, and a clamping device of being located at described support, but the wheel shaft of described clamping device clamping one bicycle rear makes described trailing wheel can float off ground and rotates freely; It is characterized in that described damping unit includes:

One pivotal part, with Y-axis to being located at described support rear, the outer peripheral face that described trailing wheel be able to be born in the surface of described pivotal part against, and under the drive of described trailing wheel with predetermined rotation direction along self original place, axle center rotation;

At least one resistance wheel is linked to described pivotal part one end respectively; Described each resistance wheel includes a central shaft and at least two air-resistance covers, and described each resistance wheel is by its central shaft and the coaxial binding of described pivotal part; Described each air-resistance cover has a recess, and described each air-resistance cover is located at the outer peripheral face of described central shaft with the mode ring of the corresponding described direction of rotation of opening of its recess.

2, the damping unit of bicycle exerciser as claimed in claim 1 is characterized in that: described each air-resistance cover can be along the radial displacement of described central shaft; Also include the extension spring with number such as described each air-resistance cover, described each spring one end links a described air-resistance cover, and the other end is linked to described central shaft.

3, the damping unit of bicycle exerciser as claimed in claim 2, it is characterized in that: also include at least two and be tabular lateral plate, mode ring with isogonism is located on the outer peripheral face of described central shaft, and each described lateral plate is radially extended outward by described central shaft outer peripheral face; Described each air-resistance cover is provided with two relative hook parts back to its recess position, and described each air-resistance cover colludes in the mode of slip by described two hook parts and is located on the described lateral plate.

4, the damping unit of bicycle exerciser as claimed in claim 3 is characterized in that: described each lateral plate has one and runs through two side faces, and generally is a vertical microscler groove with the axle center of described central shaft; Described each air-resistance cover has screwed togather a bolt and a nut, and the head of described bolt is arranged in the groove of corresponding described lateral plate, and then described air-resistance cover can only slippage in the limited range of described groove.

5, the damping unit of bicycle exerciser as claimed in claim 4 is characterized in that: described each spring one end is fixed in the bolt tail end of being located at described air-resistance cover, and the other end is fixed in corresponding described lateral plate.

6, the damping unit of bicycle exerciser as claimed in claim 1 is characterized in that: also include a fixed body, it vertically is fixed in described support rear one quarter butt, laterally connects a support portion on described quarter butt top; Described support portion has the groove of a horizontally set; With the corresponding clamshell of described each resistance wheel quantity, described each clamshell is connected in described support portion one end, and inside has an accommodation space, side face some pores that have been periphery; Described pivotal part is arranged in the groove of described support portion, and described each resistance wheel is coated in the accommodation space of described each clamshell.