TWI616221B - Adjustable resistance fan car - Google Patents

Abstract

The utility model relates to a fan vehicle with variable resistance, comprising a body unit, a resistance wheel unit mounted on the body unit and a movement unit, and a movement unit for driving the first transmission unit of the resistance wheel unit, The first fixing base of the vehicle body unit is a magnetoresistive unit mounted on the first fixing base, a pulling unit mounted between the first fixing seat and the magnetoresistive unit, and an adjusting unit. The magnetoresistive unit comprises a metal disk driven by a hub of the resistance wheel unit, an adjustment seat swingable relative to the metal disk, and two magnets mounted on the adjustment seat and spaced apart from each other to form a gap. Receiving the metal disk, the pulling unit is configured to keep the two magnets close to the metal disk, and the adjusting unit is configured to adjust the position of the two magnets relative to the metal disk to change the rotational resistance of the metal disk, thereby The movement resistance can be adjusted to meet the needs of the user.

Description

Adjustable resistance fan car

The invention relates to a sports equipment, in particular to a fan car with adjustable resistance.

The sports car disclosed in the publication No. 231532 has a vehicle body, a pedal device mounted on the vehicle body, a hand crank device and a wind resistance wheel, and a motor installed between the pedal device and the wind resistance wheel. The transmission device can drive the wind resistance wheel to rotate by stepping on the pedal device to achieve the effect of exercise and fitness, but the movement vehicle cannot change the rotation resistance of the wind resistance wheel, and cannot adjust the pedaling resistance to meet the different needs of the user. problem.

The exercise bike disclosed in the certificate number No. M532291 has a frame, a stepping crank group, a hand crank group and a wheel mounted on the frame, and a driving shaft connecting the pedaling group and the rotating wheel. a transmission mechanism of the axle, and an internal shift type resistor mounted on the axle, the internal shift type resistor has a casing, an internal transmission mounted in the casing, and a casing mounted outside the casing and controllable An actuating member of the shifting state of the internal transmission, the transmission mechanism having a driving gear coupled to the driving shaft, a driven gear coupled to the axle, a shifting gear plate mounted to the frame, and a connecting gear and the driving gear a first chain of a pinion of the shifting gear, and a large gear connecting the variable toothed disc and a second chain of the driven gear, so that the rotation of the axle can be changed by providing the internal shifting type retarder The resistance can further change the pedaling resistance. Although the exercise bicycle has the aforementioned function, the cost of the internal shift type resistor is high, resulting in a problem of high production cost of the exercise bicycle.

Accordingly, it is an object of the present invention to provide a fan car that can modulate the resistance to motion to meet the different needs of the user, as well as an adjustable variable resistance that can reduce production costs.

Therefore, the variable-speed fan car of the present invention comprises a body unit, a resistance wheel unit, a movement unit, a first transmission unit, a first fixing seat, a second transmission unit, a magnetoresistive unit, and a Pull unit and an adjustment unit.

The body unit includes a base and a front fork mounted to the front end of the base, the resistance wheel unit includes a hub rotatably mounted to the front fork, and a runner driven by the hub. The movement unit includes a stepping group installed at a rear end of the vehicle body unit, the first transmission unit is installed between the stepping group and the hub, and the stepping group drives the hub, and the first fixing seat is fixed on the base and Located behind the wheel, the second transmission unit includes a fixing rod fixed to the first fixing seat in a left-right direction, and a driving wheel driven by the hub is rotatably sleeved outside the fixing rod. a driven wheel, and a transmission belt installed between the driving wheel and the driven wheel, the magnetoresistive unit includes a metal disk driven by the driven wheel, and a pivot hole disposed in the first fixing seat along the left and right direction An adjusting seat that is swingably disposed outside the pivot with respect to the metal disk, and two magnets mounted on the adjusting seat and spaced apart from each other to form a gap for receiving the metal disk, the pulling掣 unit installed in the tone Between the seat and the first fixing seat, the two magnets have a tendency to be close to the metal disk. The adjusting unit comprises an operating member mounted on the front fork frame, a pulling block coupled to the adjusting seat, and a pulling wire connecting the operating member and the pulling block, and when the operating member is operated to interlock the pulling wire to drive the pulling block, the pulling block can drive the adjusting seat to swing and the two magnets face away from the metal disk mobile.

The adjustable variable resistance fan car comprises a body unit, a resistance wheel unit, a movement unit, a first transmission unit, a first fixing seat, a magnetoresistive unit, a pulling unit and an adjusting unit.

The body unit includes a base and a front fork mounted to the front end of the base, the resistance wheel unit includes an axle fixed to the front fork in a left-right direction, and a rotatably sleeved outside the axle a hub, and a runner driven by the hub, the motion unit includes a stepping group mounted on a rear end of the body unit, the first transmission unit being installed between the pedal group and the hub, so that the pedal group is driven The hub is fixed to the axle and located beside the wheel, the magnetoresistive unit includes a metal disk consolidated with the hub, and a pivotal portion of the first mount in the left and right direction a shaft, an adjusting seat that is swingably disposed outside the pivot with respect to the metal disk, and two magnets mounted on the adjusting seat and spaced apart from each other to form a gap, the gap is for receiving the metal disk, The pulling unit is installed between the adjusting seat and the first fixing seat, so that the two magnets have a tendency to be close to the metal disk, and the adjusting unit comprises an operating member mounted on the front fork frame, and the adjusting Block connecting block, and one Connecting the operating member and the pulling wire of the pulling block, when the operating member is operated to interlock the pulling wire to drive the pulling block, the pulling block can drive the adjusting seat to swing and move the two magnets away from the metal disk .

The effect of the invention is that by changing the position of the two magnets relative to the metal disk, the rotational resistance of the metal disk can be changed, and the motion resistance can be modulated to meet the different needs of the user, and the overall structure is changed. It can reduce the production cost of the fan car.

The present invention will be described in detail below with reference to the drawings and embodiments. Before the present invention is described in detail, the relative positional terms used in the following descriptions, such as "front", "back", "left", " Right, top, and bottom are based on the orientation and normal orientation of each figure, and similar components are denoted by the same reference numerals.

Referring to FIG. 1 , FIG. 2 and FIG. 3 , a first embodiment of a variable-speed fan car of the present invention comprises a vehicle body unit 10 , a resistance wheel unit 20 , a motion unit 30 , a first transmission unit 40 , A first fixing base 50, a second transmission unit 60, a magnetoresistive unit 70, a pulling unit 80, an adjusting unit 90 and a display unit 100.

The body unit 10 includes a base 11 formed in a work shape, a seat tube 12 fixed to the rear end of the base 11 and extending toward the top end, and a seat cushion 13 mounted on the seat tube 12, one of which is fixed to the base A front fork 14 extending at the front end of the 11 and extending toward the top end, and a reinforcing fork 15 fixed to the base 11 and extending from the rear end toward the front end and connecting the front fork 14 . The front fork frame 14 has a fork tube 141 fixed to the base 11 and having an inverted U shape, and a riser tube 142 fixed to the fork tube 141 and extending toward the top end.

The resistance wheel unit 20 includes an axle 21 fixed to the front fork 14 in a left-right direction, a hub 22 rotatably disposed outside the axle 21, and a runner 23 driven by the hub 22.

The movement unit 30 includes a tread group 31 and a hand crank group 32. The tread group 31 is mounted at the rear end of the vehicle body unit 10, and has a rotating shaft 311 rotatably inserted into the seat tube 12, and is mounted. The two first cranks 312 at the two ends of the rotating shaft 311 are respectively connected to the two second cranks 313 of the two first cranks 312, and the two pedals 314 respectively mounted on the two second cranks 313. The hand crank group 32 has two rockers 321 respectively pivotally disposed on the left and right sides of the fork pipe 141, and two rockers 321 respectively connected between the corresponding bottom of the rocker 321 and the second crank 313. Support link 322.

The first transmission unit 40 is mounted between the rotating shaft 311 of the stepping group 31 and the hub 22, so that the stepping group 31 drives the hub 22 to rotate.

Since the structure and transmission means of the motion unit 30 and the resistance wheel unit 20 and the first transmission unit 40 are easily understood by those having ordinary knowledge in the technical field of the present invention, and are not characteristic of the present invention, This does not describe its detailed structure and transmission means.

Referring to FIG. 1 , FIG. 3 and FIG. 4 , the first fixing base 50 is fixed on the base 11 and behind the rotating wheel 23 , and includes a bottom plate 51 fixed to the base 11 in the left and right direction, from the bottom plate. The left side and the right side of the 51 are bent toward the top side of the two side plates 52, a pivot plate 53 extending from the side plate 52 toward the front end, and a positioning plate 54 bent from the pivot plate 53 toward the left end. In this embodiment, the pivot plate 53 extends from the right side panel 52.

The second transmission unit 60 includes a fixing rod 61 that is fixed to the two side plates 52 of the first fixing base 50 in the left-right direction, and a driving wheel 62 that can be driven by the hub 22, and is rotatably sleeved. A driven wheel 63 outside the fixed rod 61 and a belt 64 mounted between the driving wheel 62 and the driven wheel 63.

The reluctance unit 70 includes a metal disc 71 that is coupled to the driven wheel 63 and can be driven by the driven wheel 63. A pivot 72 that is inserted into the pivot plate 53 of the first mount 50 in the left-right direction. An adjusting seat 73 slidably disposed outside the pivot shaft 72 with respect to the metal disk 71, and two magnets 74 mounted on the adjusting base 73 and spaced apart from each other to form a gap 75 for receiving The metal disk 71.

The metal disk 71 and the driven wheel 63 are located between the two side plates 52 of the first fixing base 50.

The adjusting seat 73 has a sleeve 731 rotatably sleeved outside the pivot 72, and two swing arms 732 extending from the two ends of the sleeve 731 and spaced apart from each other, and the two magnets 74 are respectively mounted on the sleeve The inner surface of the second swing arm 732.

The pulling unit 80 is installed between the adjusting seat 73 and the first fixing base 50, so that the two magnets 74 have a tendency to be close to the metal plate 71. The pulling unit 80 includes a side plate 52 fixed thereto. a first hook 81, a second hook 82 fixed to one of the swing arms 732 of the adjuster 73, and a spring 83 mounted between the first hook 81 and the second hook 82. In the embodiment, the spring 83 is a tension spring, and the adjusting seat 73 can be given a pulling force to keep the two magnets 74 close to the metal disk 71.

The adjusting unit 90 includes an operating member 91 mounted on the riser 142 of the front fork frame 14, a pulling block 92 coupled to the adjusting seat 73, and a pulling line 93 connecting the operating member 91 and the pulling block 92. .

Referring to FIG. 3 , FIG. 4 and FIG. 5 , the pulling block 92 is disposed outside the pivot shaft 72 and coupled to one of the swing arms 732 , and the pulling block 92 has an insertion hole 921 , and is disposed on the pulling block 92 . The outer peripheral surface is connected to the annular groove 922 of the insertion hole 921. The traction wire 93 has a bottom portion 931 which is firstly passed through the positioning plate 54 and then wound around the annular groove 922. The bottom portion 931 is formed and embedded in the bottom portion 931. A bottom positioning post 932 of the hole 921, and a top section 933 connecting the operating member 91 to be interlocked by the operating member 91. The top section 933 of the pull wire 93 can be directly wound around a winding portion (not shown) of the operating member 91. Thus, by rotating the operating member 91, the effect of interlocking the pulling wire 93 can be generated, that is, the roll can be rolled. Pulling the pulling wire 93 causes the bottom positioning post 932 to drive the pulling block 92 to rotate, or loosening the pulling wire 93 to release the driving force of the bottom positioning post 932 to the pulling block 92.

In addition, the top section 933 of the pull line 93 can also be indirectly connected to the operating member 91. Referring to FIG. 1, FIG. 3 and FIG. 5, the adjusting unit 90 further includes a connecting seat 94, and the mounting bracket 94 is mounted thereon. a driving line 95 between the operating members 91, and an elastic block 96 fixed in the connecting seat 94. A bottom portion of the driving line 95 is inserted into the elastic block 96, and a top portion of the driving line 95 The winding portion wound around the operating member 91 can be retracted or released by the operating member 91 (not shown), and the top portion 933 of the pulling wire 93 is locked to the elastic block 96, thereby rotating the The operating member 91 can also produce the effect of interlocking the pulling line 93, because the pulling line 93 is hidden in the riser 142 and the fork tube 141, and the top section 933 of the pulling line 93 is indirectly connected to the operation. The structure of the member 91 makes it easy to assemble and repair the adjustment unit 90.

Referring to FIG. 2, the display unit 100 includes a screen 101 fixed to the riser 142, a second fixing base 102 fixed to the fork tube 141, and a second fixing base 102 for detecting The speed of the runner 23 is connected to the speedometer 103 electrically connected to the screen 101.

In use, referring to FIG. 1 , FIG. 8 , FIG. 9 and FIG. 3 , when the user steps on the two-foot pedal 314 , the first transmission unit 40 can drive the rotation of the reel 23 while interlocking the manual movement group 32 . The two rockers 321 are oscillated, and the metal disk 71 is rotated by the second transmission unit 60, because the metal disk 71 rotates in the gap 75 between the two magnets 74, and the two magnets 74 are cut when rotated. The magnetic field lines formed between the magnetic fields cause a rotational resistance to the metal disk 71, thereby generating a foot pedaling resistance and a hand shaking resistance for the user, thereby achieving a motion effect, and further, by changing the two magnets 74 can produce an effect of changing the resistance with respect to the position of the metal disk 71. Referring to FIG. 6, in the normal state, the adjusting seat 73 of the magnetoresistive unit 70 receives the pulling force of the spring 83, so that the two magnets 74 have constant The metal disk 71 is located in the gap 75 between the two magnets 74, and the rotation resistance is large, and the relative pedaling resistance and the shaking resistance are also large. Figure 1, Figure 7, want to adjust small For example, the driving member 91 is rotated to move the pulling wire 93 toward the arrow 140 in FIG. 7, and the pulling block 92 can be driven by the bottom positioning post 932 of the pulling wire 93. 72 is a clockwise rotation of the fulcrum, and the pulling block 92 drives the adjusting seat 73 to swing the two swinging arms 732 away from the metal disk 71, thereby moving the two magnets 74 away from the metal disk 71. The metal disk 71 has a small volume in the gap 75 between the two magnets 74, and the rotational resistance is small, and the relative pedaling resistance and the rocking resistance are also reduced. At this time, the spring 83 is stretched to have a returning elastic force. Referring to FIG. 6, when the operating member 91 is reversely rotated to release the pulling wire 93, the driving force of the bottom positioning post 932 to the pulling block 92 can be released, and the adjusting member 73 can be pulled by the pulling force of the spring 83. The second swing arm 732 is swung in a direction approaching the metal disk 71, so that the rotational resistance of the metal disk 71 is increased.

Referring to FIG. 1, in use, the user's motion data and the rotational speed of the reel 23 can be displayed on the screen 101.

In summary, the fan car with variable resistance of the present invention has the following advantages and advantages, and thus the object of the present invention can be achieved.

1. The present invention can change the rotational resistance of the metal disk 71 by changing the position of the two magnets 74 relative to the metal disk 71, thereby adjusting the foot pedaling resistance and the hand shaking resistance, which can be adapted to the user. demand.

The overall structure of the first fixing base 50, the second transmission unit 60, the reluctance unit 70, the pulling unit 80 and the adjusting unit 90, and the internal shifting type adjustable resistor of the exercise bicycle. The structure is different, and the overall cost is low, which can reduce the production cost of the fan car.

3. The present invention can display the user's motion data and the rotational speed of the runner 23 on the screen 101, and the use convenience is better.

Referring to FIG. 10, FIG. 11, and FIG. 12, a second embodiment of the adjustable variable resistance fan vehicle includes a vehicle body unit 10, a resistance wheel unit 20, a motion unit 30, and a first transmission unit 40. A first fixing base 110, a magnetoresistive unit 120, a pulling unit 130, an adjusting unit 90 and a display unit 100.

The second embodiment and the vehicle body unit 10 of the first embodiment, the resistance wheel unit 20, the motion unit 30, the first transmission unit 40, the pulling unit 80, the adjusting unit 90, and the display unit The structure of 100 is the same and will not be described again.

The difference between the second embodiment and the first embodiment is that the first fixing base 110 and the magnetoresistive unit 120 of the second embodiment are mounted on the side of the resistance wheel unit 20, and the pulling unit 130 is mounted on the side. Between the first fixing base 110 and the adjusting unit 90, the second transmission unit 60 of the first embodiment is omitted (see FIGS. 1 and 3).

The first fixing base 110 includes a fixing plate 111 fixed to the axle 21, a pivot plate 112 bent from the top end of the fixing plate 111 toward the direction away from the rotating wheel 23, and extending toward the top end, and a lock A positioning plate 113 that is connected to the pivot plate 112 and bent toward the direction of the runner 23.

The magnetoresistive unit 120 includes a metal disk 121 that is screwed and fixed to the hub 22, and a pivot 122 that is inserted into the pivot plate 112 of the first mount 110 in the left-right direction, and is opposite to the metal. The disc 121 is slidably disposed on the adjusting seat 123 outside the pivot shaft 122, and the two swing arms 124 mounted on the adjusting seat 123 and spaced apart from each other to form a gap 126, the gap 126 is used for accommodating the metal Disk 121.

The pull unit 130 includes a first hook 131 fixed to the pivot plate 112, a second hook 132 fixed to one of the swing arms 124 of the adjuster 123, and a first hook 131 mounted on the first hook 131 a spring 133 between the second hook 132.

The adjusting unit 90 also includes an operating member 91 mounted on the riser 142 of the front fork frame 14, a pulling block 92 coupled to the adjusting seat 123, and a pulling line connecting the operating member 91 and the pulling block 92. 93.

The principle and means for adjusting the pedal stepping resistance and the hand shaking resistance of the second embodiment are the same as those of the first embodiment. Referring to FIG. 12, in the normal state, the adjusting seat 123 of the magnetoresistive unit 120 receives the spring. The pulling force of 133 causes the two magnets 125 to have a tendency to be close to the metal disk 121. At this time, the metal disk 121 is located in the gap 126 between the two magnets 125, and has a large rotational resistance, and is relatively stepped on. The resistance and the shaking resistance are also large. Referring to FIG. 10 and FIG. 13 , if the small resistance is to be adjusted, the operating member 91 can be rotated to pull the pulling wire 93, and the bottom positioning post 932 of the pulling wire 93 can be used to drive the pulling wire 93. The pulling block 92 rotates counterclockwise, and the pulling block 92 drives the two swing arms 124 of the adjusting base 123 to swing away from the metal disk 121, thereby moving the two magnets 125 away from the metal disk 121 to make the metal disk The volume in the gap 126 between the two magnets 125 is reduced, the rotational resistance is reduced, and the relative pedaling resistance and the rocking resistance are also reduced.

In the other embodiment, the display unit 100 can also display the user's motion data and the rotational speed of the reel 23 on the screen 101.

In summary, the fan car with variable resistance of the present invention has the following advantages and advantages, and thus the object of the present invention can be achieved.

1. The present invention can change the rotational resistance of the metal disk 121 by changing the position of the two magnets 125 relative to the metal disk 121, thereby adjusting the foot pedaling resistance and the hand shaking resistance, which can be adapted to the user. demand.

The overall structure of the first fixing base 110, the magnetoresistive unit 120, the pulling unit 130 and the adjusting unit 90 of the present invention is different from the structure of the internal shifting type adjustable resistor of the conventional exercise bicycle, and the overall cost is Lower, can reduce the production cost of the fan car.

3. The present invention can display the user's motion data and the rotational speed of the runner 23 on the screen 101, and the use convenience is better.

However, the above is only the embodiment of the present invention, and the scope of the invention is not limited thereto, and all the equivalent equivalent changes and modifications according to the scope of the patent application and the patent specification of the present invention are still The scope of the invention is covered.

10‧‧‧ body unit

11‧‧‧Base

12‧‧‧ seat tube

13‧‧‧Cushion

14‧‧‧Front fork

141‧‧‧fork

142‧‧‧Riser

15‧‧‧Reinforced fork

20‧‧‧Resistance wheel unit

21‧‧‧Axle

22‧‧‧花鼓

23‧‧‧Runner

30‧‧‧ sports unit

31‧‧‧Stepping group

75‧‧‧ gap

80‧‧‧掣 unit

81‧‧‧First Tie

82‧‧‧second hook

83‧‧‧ Spring

90‧‧‧Adjustment unit

91‧‧‧Operating parts

92‧‧‧ Pulling block

921‧‧‧ hole

922‧‧‧Circle

93‧‧‧ traction line

931‧‧‧ bottom section

932‧‧‧ bottom positioning column

933‧‧‧ top section

311‧‧‧Rotary axis

312‧‧‧First crank

313‧‧‧Second crank

314‧‧‧ pedals

32‧‧‧Hand group

321‧‧‧ rocker

322‧‧‧ Connecting rod

40‧‧‧First transmission unit

50‧‧‧First mount

51‧‧‧floor

52‧‧‧ side panels

53‧‧‧ pivot board

54‧‧‧ positioning board

60‧‧‧Second transmission unit

61‧‧‧Fixed rod

62‧‧‧Drive wheel

63‧‧‧ driven wheel

64‧‧‧Drive belt

70‧‧‧Magnetoresistive unit

71‧‧‧Metal disk

72‧‧‧ pivot

73‧‧‧ adjustment seat

731‧‧‧Sleeve

732‧‧‧ swing arm

94‧‧‧Connecting seat

95‧‧‧ drive line

96‧‧‧Flexible block

100‧‧‧ display unit

101‧‧‧ screen

102‧‧‧Second fixed seat

103‧‧‧Speed measuring parts

110‧‧‧First mount

111‧‧‧Fixed plate

112‧‧‧ pivot board

113‧‧‧ Positioning board

120‧‧‧Magnetoresistive unit

121‧‧‧Metal plate

122‧‧‧ pivot

123‧‧‧ adjustment seat

124‧‧‧ swing arm

125‧‧‧ magnet

126‧‧‧ gap

130‧‧‧ 拉掣 unit

131‧‧‧First Tie

132‧‧‧second hook

133‧‧ ‧ spring

140‧‧‧Arrow

74‧‧‧ magnet

Other features and effects of the present invention will be apparent from the following description of the drawings, wherein: Figure 1 is a perspective view of a first embodiment of a variable vane fan of the present invention, showing the first embodiment The example includes a body unit, a resistance wheel unit, a motion unit, a first transmission unit, a first fixing seat, a second transmission unit, a magnetoresistive unit, a pulling unit, an adjusting unit and a display. Figure 2 is another perspective view of the first embodiment; Figure 3 is an incomplete partial perspective view of the first embodiment showing the first transmission unit, the first fixed seat, the second transmission unit, The magnetoresistive unit, the pulling unit and a pulling line of the adjusting unit; FIG. 4 is a partially exploded perspective view of the first embodiment, showing the first fixing seat, the second transmission unit, the magnetoresistive unit, Figure 5 is an incomplete partial perspective view of the first embodiment, showing that the traction line of the adjustment unit is indirectly connected to an operating member; Figure 6 is a first embodiment of the first embodiment Incomplete right side The schematic diagram shows that a metal disk of the magnetoresistive unit is in a state of high rotational resistance; FIG. 7 is a view similar to FIG. 6, showing that the metal disk is in a state of low rotational resistance; FIG. 8 is a view of the first embodiment. A right side schematic view showing a stepping group and a hand cranking group of the motion unit in a first position; FIG. 9 is a view similar to FIG. 8 showing the stepping group and the hand crank group in a second position; FIG. A perspective view of a second embodiment of the variable resistance fan of the present invention, showing that the second embodiment includes a body unit, a resistance wheel unit, a motion unit, a first transmission unit, and a first holder FIG. 11 is a partially exploded perspective view of the second embodiment, showing the first mount, the magnetoresistive unit, the pull unit, and a display unit; FIG. 12 is an incomplete right side view of the second embodiment, showing a metal disk of the magnetoresistive unit in a state of high rotational resistance; and FIG. 13 is similar to FIG. View, display It is shown that the metal disk is in a state in which the rotational resistance is small.

Claims (8)

A variable-barrier fan car comprising: a body unit comprising a base and a front fork mounted to the front end of the base; a resistance wheel unit including a rotatably mounted to the front fork a hub, and a runner driven by the hub; a movement unit comprising a stepping group mounted to the rear end of the body unit; a first transmission unit mounted between the pedal group and the hub to enable the pedal group The first fixing base is fixed on the base and located behind the rotating wheel; a second transmission unit includes a fixing rod fixed to the first fixing seat in a left-right direction, and is driven by the hub a driving wheel, a driven wheel rotatably disposed outside the fixing rod, and a transmission belt installed between the driving wheel and the driven wheel; a magnetoresistive unit including a metal driven by the driven wheel a disc, a pivot shaft disposed in the left and right direction of the first fixing seat, an adjusting seat that is swingably disposed outside the pivot shaft relative to the metal disc, and is mounted on the adjusting seat and spaced apart from each other a gap of two magnets, a gap is used for accommodating the metal disk; a pulling unit is installed between the adjusting seat and the first fixing seat, so that the two magnets have a tendency to be close to the metal disk; and an adjusting unit, including an adjusting unit An operating member on the front fork frame, a pulling block coupled to the adjusting base, and a connecting the operating member and the pulling block a pulling line, when the operating member is linked to the pulling wire to drive the pulling block, the pulling block can drive the adjusting seat to swing and move the two magnets away from the metal disk; the adjusting seat has a set a sleeve outside the pivot, and two swing arms extending from the two ends of the sleeve and spaced apart from each other, the two magnets being respectively mounted on the inner faces of the two swing arms; the first fixed seat includes a left and right a bottom plate fixed to the base, a side plate bent from the left side and the right side of the bottom plate toward the top end, a pivot plate extending from the one side plate toward the front end, and a bent line from the pivot plate toward the left end for the traction line The positioning plate of the second transmission unit is fixedly disposed on the two side plates, and the driven wheel and the metal plate are located between the two side plates. The adjustable vane fan of claim 1, wherein the front fork has a fork tube, and a riser extending from the fork tube toward the top end, the adjustable resistance fan car further includes a a display unit, the display unit includes a screen fixed to the riser, a second fixing seat fixed to the fork tube, and a second fixing seat fixed to the second fixing seat for detecting the rotation speed of the rotating wheel Speed measuring piece connected to the screen. The adjustable vane fan of claim 1, wherein the pulling unit comprises a first hook fixed to one side of the board, and a second hook fixed to one of the swing arms of the adjusting seat. And a spring mounted between the first hook and the second hook. The adjustable vane fan of claim 1, wherein the pulling block is sleeved outside the pivot and is coupled to one of the swing arms, and the pulling block has an inlay a hole, and a ring groove disposed on the outer peripheral surface of the pulling block and communicating with the hole, the pulling wire has a positioning plate passing through the first fixing seat and is wound around the bottom portion of the ring groove, and is formed on the hole The bottom section is embedded in the bottom positioning post of the through hole, and a top section connecting the operating member to be interlocked by the operating member. The adjustable vane fan of claim 1, wherein the adjusting unit further comprises a connecting seat, a driving line installed between the connecting seat and the operating member, and a fixing in the connecting seat a resilient card block, a bottom segment of the drive wire is carded on the elastic card block, a top segment of the drive wire can be retracted or loosened by the operating member, and the top segment of the pull wire is carded on the elastic card Piece. A variable-speed fan car comprising: a body unit comprising a base and a front fork mounted to the front end of the base; a resistance wheel unit including a fixed front fork frame in a left-right direction An axle, a hub that is rotatably sleeved outside the axle, and a runner that is driven by the hub; a movement unit including a stepping group mounted to the rear end of the body unit; a first transmission unit, installed Between the stepping group and the hub, the stepping group drives the hub; a first fixing seat is fixed to the axle and located beside the wheel; a magnetoresistive unit includes a metal consolidated with the hub a disc, a pivot shaft disposed in the left and right direction of the first fixing seat, an adjusting seat that is swingably disposed outside the pivot shaft relative to the metal disc, and is mounted on the adjusting seat and spaced apart from each other a gap of two magnets, the gap is used to accommodate the metal disk; a pulling unit mounted between the adjusting seat and the first fixing seat, so that the two magnets have a tendency to be close to the metal disk; and an adjusting unit comprising an operating member mounted on the front fork frame, a pulling block coupled to the adjusting seat, and a pulling wire connecting the operating member and the pulling block, when the operating member is operated to interlock the pulling wire to drive the pulling block, the pulling block can drive the adjusting seat to swing, and Moving the two magnets away from the metal disk; the first fixing base includes a set of fixing plates fixed to the wheel shaft, and the first fixing plate is bent toward the front end away from the rotating wheel, and then turned toward the top end An extended pivot plate, and a positioning plate locked to the pivot plate and bent toward the rotating wheel for the traction wire to be inserted, the adjusting seat having a sleeve disposed outside the pivot, and Two swing arms extending from both ends of the sleeve and spaced apart from each other, the two magnets being respectively mounted on the inner faces of the two swing arms. The adjustable vane fan of claim 6, wherein the front fork has a fork tube, and a riser extending from the fork tube toward the top end, the adjustable resistance fan car further includes a a display unit, the display unit includes a screen fixed to the riser, a second fixing seat fixed to the fork tube, and a second fixing seat fixed to the second fixing seat for detecting the rotation speed of the rotating wheel Speed measuring piece connected to the screen. The adjustable vane fan of claim 6, wherein the pulling unit comprises a first hook fixed to the pivot plate, and a second hook fixed to one of the swing arms of the adjusting seat And a spring mounted between the first hook and the second hook.