TWI817839B - Exercise machine and its resistance device - Google Patents

Abstract

An exercise machine and its resistance device. The resistance device includes an axis unit, a first fan blade unit with a plurality of first blades, a second fan blade unit with a plurality of second blades, and a braking unit. . The first blade unit and the second blade unit are arranged on the axis unit and can rotate around an axis. The first blades and the second blades cooperate to form a plurality of wind receiving surfaces. The driving unit is used to drive the first fan blade unit to move along the axis relative to the second fan blade unit between a first position and a second position, wherein the wind receiving surfaces of the first position The area is greater than the area of the wind receiving surfaces at the second position. Users can change the resistance by adjusting the size of different wind receiving areas.

Description

Exercise machine and its resistance device

The present invention relates to a kind of exercise equipment, in particular to an exercise machine with a simple structure and its resistance device.

Generally, in a fan car, the user steps on two pedals with both feet, and drives the wind resistance wheel to rotate through transmission elements such as chains or belts. The user can achieve exercise and fitness effects through the rotational resistance provided by the wind resistance wheel.

Referring to Figure 1, a fan car created by the applicant in this case and obtained the Republic of China New Patent Announcement No. TWM549090U is used as an example. It mainly changes the rotational resistance of a metal plate to adjust the movement intensity. The resistance device of the fan truck includes a magnetic resistance unit 91 and an adjustment wire 92 . The reluctance unit 91 includes a metal turntable 911 , an adjustment base 912 that can swing relative to the metal turntable 911 with a shaft 93 as the center, and two components installed on the adjustment base 912 and spaced apart on both sides of the metal turntable 911 . Magnet 913 on the opposite side. One end of the adjustment wire 92 is fixed on the adjustment seat 912 and can drive the adjustment seat 912 to swing around the shaft 93 , so that the overlapping area of the magnets 913 and the metal turntable 911 can be changed to adjust the relationship between the two. The magnitude of the magnetic resistance produced.

Since the fan car mainly uses magnetic resistance design and achieves resistance control through changes in magnetic induction between the magnets 913 and the metal turntable 911, the cost is high and the structure is complex.

Therefore, the object of the present invention is to provide a resistance device for an exercise machine with a simple structure and low cost.

Therefore, the resistance device of the exercise machine of the present invention includes an axis unit, a first blade unit, a second blade unit, and a braking unit.

The axis unit includes a fixed shaft extending along an axis, and a shaft member rotatably disposed outside the fixed shaft.

The first blade unit is disposed on the shaft and as the shaft rotates around the axis, the first blade unit has a plurality of first blades that are angularly offset from each other in the circumferential direction around the axis.

The second fan blade unit is spaced apart from the first fan blade unit on the shaft and rotates around the axis as the shaft rotates. The second fan blade unit has several angles that are angularly offset from each other in the circumferential direction around the axis. The second blades of the first blades and the second blades cooperate to form a plurality of wind receiving surfaces.

The driving unit is used to drive the first fan blade unit to move along the axis relative to the second fan blade unit between a first position and a second position. The area of the wind receiving surfaces is greater than the area of the wind receiving surfaces at the second position.

Therefore, another object of the present invention is to provide an exercise machine with a simple structure and low cost.

Therefore, the exercise machine of the present invention includes a body, an operating unit, and the aforementioned resistance device.

The operating unit is provided on the body and is operated by a user.

The resistance device is installed on the body and used to provide movement resistance to the operating unit.

The effect of the present invention is to use the driving unit to drive the first fan blade unit to move along the axis relative to the second fan blade unit to adjust the area of the wind receiving surfaces, thereby changing the relationship between the first fan blade unit and the second fan blade unit. The rotation resistance of the second fan blade unit is used to adjust the movement intensity.

1: Ontology

11: base

12:Fork stand

13:Rear rack

14: Cushion

15: Shell base

2: Transmission unit

21:Rotate the wheel set

211: turning wheel

212:Drive shaft

213:Drive chain

22:Transmission belt

23: Shell

3: Operating unit

31: Grip

32:pedal

4: Resistance device

5: Axis unit

50: Space inside the shaft

51:Fixed shaft

511: Shaft hole

512:Chute

52:Shaft parts

521: around the wall

522:Connecting wall

523: Limit slot

524:Tooth segment

53:Fixed bearing

6: First fan blade unit

600:Wind side

61:First bushing

611: Positioning hole

612: Locking hole

613:Lock firmware

62:First pedestal

63:First blade

631:First film department

632:First opening

633: Groove

7: Second fan blade unit

71:Second bushing

72:Second pedestal

73:Second blade

731:The second part

732:Second opening

733: convex strip

8: Actuation unit

81:Thrust bearing group

82: pull block

83: Linkage cable

84: Connector

841: Bushing

842:Screw

85: Elastic parts

86: Knob

91:Magnetoresistive unit

911:Metal turntable

912: Adjustment seat

913:Magnet

92:Adjustment line

93:Shaft

X: axis

L1: forward and backward direction

L2: left and right direction

L3: up and down direction

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Figure 1 is a side view and illustrates a resistance device disclosed in the Republic of China Patent Publication No. TWM549090U; Figure 2 is a A perspective view illustrating an embodiment of the exercise machine of the present invention; Figure 3 is an incomplete side view of the embodiment; Figure 4 is an incomplete top view of the embodiment, illustrating the connection relationship between a transmission unit and a resistance device; Figure 5 is an incomplete perspective cross-sectional view of the embodiment; Figure 6 is an exploded perspective view, illustrating the resistance device. An axis unit and a braking unit of the device; Figure 7 is a perspective exploded view of the resistance device; Figure 8 is a partial perspective view illustrating a first blade unit of the resistance device relative to a second blade unit In a first position; Figure 9 is a view similar to Figure 8, illustrating the first blade unit in a second position relative to the second blade unit; Figure 10 is along the line X-X in Figure 4 A cross-sectional view taken to illustrate the first blade unit in the first position; and FIG. 11 is a cross-sectional view similar to FIG. 10 , illustrating the first blade unit in the second position.

Referring to Figures 2 to 4, an embodiment of the exercise machine of the present invention includes a body 1, a transmission unit 2, an operating unit 3, and a resistance device 4. This embodiment is a rowing machine, which can simultaneously exercise the muscles of the limbs and upper body through training that simulates rowing motion.

The body 1 includes a base 11 extending in a front-to-back direction L1, a fork 12 connected to the front end of the base 11, a rear frame 13 connected to the rear end of the base 11, and a fork 12 installed on the base 11 Seat cushion 14.

The transmission unit 2 includes a rotating wheel set 21 rotatably arranged on the body 1 , a transmission belt 22 wound around the rotating wheel set 21 , and a shell 23 covering the rotating wheel set 21 and the transmission belt 22 . The rotating wheel set 21 has a rotating wheel 211, a driving shaft 212 that passes through the rotating wheel 211 along a left-right direction L2 and can drive the rotating wheel 211 to rotate, and one end is fixed on the base 11 and is wound around the driving shaft. Drive chain 213 of shaft 212.

The operating unit 3 includes a handle 31 connected to the other end of the drive chain 213 for the user's hands to hold, and two handles 31 respectively provided on the left and right sides of the body 1 for the user's feet to be fixed. Pedal 32. When the user sits on the seat cushion 14, bends both feet and steps on the pedals 32, and holds the handle 31 tightly with both hands, the user can simulate a rowing action by repeatedly pulling the handle 31 to drive the rotating wheel set 21 to rotate. The effect of exercise and fitness.

Referring to FIGS. 4 to 6 , the resistance device 4 is provided on the body 1 and connected to the transmission unit 2 . The resistance device 4 includes an axis unit 5, a first blade unit 6, a second blade unit 7, a housing 15 (see Figure 3), and a braking unit 8.

The axis unit 5 is disposed at the front end of the body 1 and is connected to the transmission belt 22 of the transmission unit 2 and driven by the transmission unit 2 . The axis unit 5 has a fixed shaft 51 extending along an axis X parallel to the left-right direction L2, a fixed shaft 51 rotatably disposed on A shaft member 52 outside the fixed shaft 51 and two fixed bearings 53 arranged at both left and right ends of the fixed shaft 51 and fixed between the fixed shaft 51 and the shaft member 52 . Due to the support of the fixed bearings 53, there is an inner shaft space 50 between the fixed shaft 51 and the shaft member 52.

The fixed shaft 51 has a shaft hole 511 that extends along the axis X and is open on the left side, and a slide groove 512 that extends along an up-down direction L3 perpendicular to the axis The chute 512 is an elliptical groove.

The shaft member 52 can rotate relative to the fixed shaft 51 and has a surrounding wall 521 surrounding the axis X, and a connection surrounding the axis Wall 522. The surrounding wall 521 is formed with a plurality of limiting grooves 523 perpendicular to the axis X and penetrating inside and outside. The limiting grooves 523 are spatially connected to the inner space 50 of the shaft. The connecting wall 522 is formed with a tooth section 524 for the transmission belt 22 to be wound around.

Referring to FIGS. 5 to 7 , the first blade unit 6 is disposed on the shaft 52 and rotates around the axis X along with the shaft 52 . The first blade unit 6 has a first sleeve 61 that is movably sleeved outside the shaft member 52, a first base 62 that is fixed to the first sleeve 61 and is generally disk-shaped, and A plurality of first blades 63 are arranged vertically on the first base 62 and are angularly staggered from each other in the circumferential direction around the axis X.

The first sleeve 61 has a plurality of positioning holes 611 extending in a direction perpendicular to the axis X and corresponding to the positioning holes 611 of the limiting grooves 523 of the shaft member 52 , and a plurality of locks formed on the outer periphery and arranged circumferentially. Fixed hole 612. The locking holes 612 are respectively provided with several The fasteners 613 are fastened so that the first base 62 is fixed on the first sleeve 61 .

The second blade unit 7 and the first blade unit 6 are spaced apart from the shaft member 52 and rotate together with the shaft member 52 around the axis X. The second blade unit 7 has a second sleeve 71 fixed on the shaft 52 , a second base 72 connected to the second sleeve 71 and in the shape of a disk, and several vertically arranged on the second base 72 . The second base 72 and the second blades 73 are angularly offset from each other in the circumferential direction around the axis X. The second blades 73 and the first blades 63 face each other.

The braking unit 8 has a thrust bearing group 81 disposed between the fixed shaft 51 and the shaft member 52 and located in the inner space 50 of the shaft, a thrust bearing group 81 that can pass through the slide groove 512 along the up and down direction L3 and connect the The pulling block 82 of the thrust bearing group 81 , a linking cable 83 that penetrates the shaft hole 511 along the left-right direction L2 and is connected to the pulling block 82 , and a plurality of positioning holes 611 formed by the first sleeve 61 respectively. The connecting piece 84 passes through the limiting grooves 523 of the shaft member 52 and is connected to the thrust bearing group 81, and is sleeved on the fixed shaft 51 with both ends abutting against the thrust bearing group 81 and 81 respectively. The elastic member 85 of the fixed bearing 53 on the left side. In this embodiment, the elastic member 85 is a spring.

Each connecting member 84 has a bushing 841 that passes through the shaft member 52 and is connected to the corresponding positioning hole 611 , and a screw 842 that penetrates the bushing 841 and is locked to the thrust bearing group 81 .

Referring to Figures 3 to 5, the other end of the linking cable 83 is provided with a knob 86. Operating the knob 86 can drive the linking cable 83 to pull the pulling block 82 relative to the slide groove 512. Move, the pulling block 82 links the thrust bearing group 81 to move to the left, and the thrust bearing group 81 simultaneously drives the connectors 84 to move relative to the limiting groove 523 to link the first sleeve 61 relative to the The shaft member 52 moves, and the elastic member 85 is squeezed to accumulate an elastic restoring force to reset the thrust bearing group 81 .

Referring to FIGS. 7 to 9 , each first blade 63 of the first fan blade unit 6 is in a fence shape and has a plurality of first blade portions 631 arranged at intervals, and a plurality of first blade portions 631 arranged at intervals. The first opening 632 between 631. Each second blade 73 of the second blade unit 7 is fence-shaped and has a plurality of second blade portions 731 arranged at intervals, and a plurality of second openings arranged at intervals between the second blade portions 731 732. The first blades 63 and the second blades 73 cooperate to form a plurality of wind receiving surfaces 600 . The shape and structure of each first blade 63 is similar to that of each second blade 73. The only difference is that each first blade 63 has two grooves 633 respectively provided on both sides. 73 has two protruding strips 733 respectively provided on both sides, and the protruding strips 733 can respectively correspond to the grooves 633.

Referring to Figures 5, 10 and 11, the braking unit 8 is used to drive the first blade unit 6 along the axis X relative to the second blade unit 7 to a first position (Figure 10) and a first Move between the two positions (Figure 11).

Referring to FIGS. 8 and 10 , when the first blade unit 6 is in the first position, the first base 62 is away from the second base 72 , and the first sheet portions 631 cover the second openings 732 At least a part of the second piece portion 731 covers the first openings 632 at least part of. In this embodiment, the second openings 732 are completely shielded by the two first piece parts 631, and the first openings 632 are completely shielded by the two second piece parts 731. Therefore, the first blades 63 and the The rotation resistance of the second blade 73 is relatively large.

Referring to FIGS. 9 and 11 , when the first blade unit 6 is in the second position, the first base 62 is close to the second base 72 , and the first openings 632 are completely connected to the second openings 732 Overlapping, the first piece portions 631 and the second piece portions 731 completely overlap, and the elastic member 85 is squeezed to accumulate the elastic restoring force. Therefore, the rotation resistance of the first blades 63 and the second blades 73 is small. In addition, it should be noted that when the first blade unit 6 moves relative to the second blade unit 7 , the smoothness of movement can be improved through the track design of the protrusions 733 corresponding to the grooves 633 respectively. .

It is worth mentioning that in this embodiment, each wind-receiving surface 600 refers to the surface in contact with the air. Since the area of the wind receiving surfaces 600 at the first position is larger than the area of the wind receiving surfaces 600 at the second position, the rotation resistance at the first position is greater than at the second position.

Referring to Figure 4, Figure 10 and Figure 11, when the user needs higher exercise intensity, he only needs to operate the knob 86 to move the first blade unit 6 to the first position to increase the wind receiving surface 600. area to obtain higher rotational resistance. On the contrary, when the user needs lower exercise intensity, he only needs to operate the knob 86 to move the first blade unit 6 to the second position to reduce the area of the wind receiving surfaces 600 to obtain a lower exercise intensity. Rotational resistance.

It should be noted that the number of the first openings 632 of each first blade 63 is not limited to two, and can also be three or more, as long as the area of the wind receiving surfaces 600 can be changed. However, the present invention is not limited to this.

It is worth mentioning that the exercise machine in this embodiment is a rowing machine, but the resistance device 4 can also be applied to a fan bike or other exercise equipment that also achieves fitness through resistance training.

Through the above description, the advantages of the foregoing embodiments can be summarized as follows:

1. By driving the first fan blade unit 6 to move between the first position and the second position relative to the second fan blade unit 7, the user can adjust different wind conditions according to needs. The size of the area achieves the effect of adjusting the size of the resistance.

2. Compared with the existing mechanism that uses magnetic resistance to achieve resistance adjustment, this embodiment adjusts the area of the wind receiving surfaces 600 through the design of the first blades 63 and the second blades 73 that can overlap each other. By changing the movement resistance, the cost of this embodiment is lower and the structure is simpler.

However, the above are only examples of the present invention, and should not be used to limit the scope of the present invention. All simple equivalent changes and modifications made based on the patent scope of the present invention and the content of the patent specification are still within the scope of the present invention. Within the scope covered by the patent of this invention.

5: Axis unit

50: Space inside the shaft

51:Fixed shaft

511: Shaft hole

512:Chute

52:Shaft parts

523: Limit slot

6: First fan blade unit

600:Wind side

61:First bushing

62:First pedestal

63:First blade

631:First film department

632:First opening

7: Second fan blade unit

71:Second bushing

72:Second pedestal

73:Second blade

731:The second part

732:Second opening

8: Actuation unit

81:Thrust bearing group

82: pull block

83: Linkage cable

84: Connector

85: Elastic parts

X: axis

L2: left and right direction

L3: up and down direction

Claims (9)

A resistance device for an exercise machine, including: An axis unit includes a fixed shaft extending along an axis, and a shaft member rotatably disposed outside the fixed shaft; A first fan blade unit is provided on the shaft and rotates around the axis as the shaft rotates. The first fan blade unit has a plurality of first blades that are angularly offset from each other in the circumferential direction around the axis; A second fan blade unit is spaced from the first fan blade unit on the shaft and rotates around the axis as the shaft rotates. The second fan blade unit has several angles to each other in the circumferential direction around the axis. The staggered second blades, the first blades and the second blades cooperate to form multiple wind receiving surfaces; and A driving unit is used to drive the first fan blade unit to move along the axis relative to the second fan blade unit between a first position and a second position. The wind receiving surfaces of the first position are The area is greater than the area of the wind receiving surfaces at the second position. The resistance device of an exercise machine as claimed in claim 1, wherein the first blade unit includes a first bushing movably disposed on the shaft member, and a first bushing connected to the first bushing and provided for the The first base is provided with the first blade. The second blade unit includes a second sleeve fixed on the shaft member, and a second base connected to the second sleeve and for the second blades to be disposed. The actuating unit is used to drive the first shaft sleeve to move. The resistance device of an exercise machine as claimed in claim 2, wherein the fixed shaft has an axis hole extending along the axis, and a slide groove perpendicular to the axis and connected to the axis hole, and the braking unit includes a a thrust bearing set disposed between the fixed shaft and the shaft member, a pulling block movably disposed in the chute and connected to the thrust bearing set, a thrust bearing penetrating the shaft hole and connected to the pulling block A linking cable, and at least one connecting piece that passes through the shaft member from the first sleeve and is connected to the thrust bearing group. The linking cable can drive the pulling block to push the thrust bearing group to link the first shaft sleeve. Move. The resistance device of the exercise machine according to claim 3, wherein the axis unit further includes a plurality of fixed bearings arranged between the fixed shaft and the shaft member, and the braking unit further includes a set of fixed bearings arranged on the fixed shaft. And both ends are respectively in contact with the elastic member of the thrust bearing group and one of the fixed bearings. The resistance device of an exercise machine as claimed in claim 3, wherein the braking unit includes a plurality of connecting members, and the shaft member has a plurality of limiting grooves perpendicular to the axis for the connecting members to be movably disposed. . The resistance device of an exercise machine as claimed in claim 1, wherein each first blade of the first blade unit has a plurality of first openings and a plurality of first blade parts, and each of the second blade unit has a plurality of first openings and a plurality of first blade parts. The second blade has a plurality of second openings and a plurality of second blade portions. When the first blade unit is in the first position, the first blade portions cover at least part of the second openings. The second piece covers at least part of the first openings. When the first blade unit is in the second position, the first openings completely overlap the second openings. The resistance device of an exercise machine as claimed in claim 6, wherein each first blade further has at least one groove, and each second blade further has at least one convex strip corresponding to the corresponding groove. . An exercise machine including: one body; An operating unit is provided on the body and is operated by the user; and A resistance device as described in claim 1 is installed on the body and used to provide movement resistance to the operating unit. The exercise machine according to claim 8, further comprising a transmission unit, the transmission unit includes a rotating wheel set rotatably provided on the body, and a transmission belt wound around the rotating wheel set and the shaft member, the The operating unit is connected to the rotating wheel set.