Assembly for adjusting stride of elliptical machine and elliptical machine

Abstract

The invention provides an elliptical machine stride adjusting assembly and an elliptical machine. The elliptical machine stride adjusting assembly comprises a connecting rod, a swing rod, an adjusting arm and a transmission rod. One end of the transmission rod is connected with the front crank assembly, and the other end is pivoted with one end of the adjusting arm; one end of the swing rod is pivoted with the connecting rod, and the other end is rotationally connected with the swing shaft; the adjusting arm is movably connected with the swing rod so as to adjust the distance R from the pivot joint end of the adjusting arm and the transmission rod to the swing shaft, and the distance R is the swing radius of the adjusting arm around the swing shaft. The adjusting arm and the swing rod are in linkage fit in the swing direction of the adjusting arm. When one end of the transmission rod rotates around the front crank assembly to pass through an arc l, the arc of the adjusting arm swinging around the swing shaft is also l; when the distance R is reduced, the swing central angle corresponding to the arc l is increased, the swing amplitude of the swing rod driven by the adjusting arm is increased, and the distance of the connecting rod moving from the far end to the inlet end is increased accordingly; when the distance R is increased, the swing central angle corresponding to the arc l is decreased, the swing amplitude of the swing rod driven by the adjusting arm is decreased, and the distance of the connecting rod moving from the far end to the inlet end is decreased accordingly.

Description

TECHNICAL FIELD

[0001] The present application relates to exercise equipment, in particular to elliptical machines. BACKGROUND

[0002] Elliptical machines can simulate running, cycling, climbing, and even more exercise methods, and are very powerful, but the strength of the elliptical machine is relatively small, so it is more suitable for warm-up exercises or for older users, and it is also suitable for some post-injury rehabilitation. Of course, if you only want to ensure the daily exercise amount and do not pursue high intensity, the elliptical machine is a very good choice. When using the elliptical machine, the movement trajectory presents an elliptical shape, and when the slope is raised, it presents an inclined elliptical shape. During the movement, the arms and legs follow the movement trajectory of the elliptical machine, so the arms and legs will be exercised. If you want to strengthen leg training, you can not hold the handrails, and because the elliptical machine is a standing exercise, your body will naturally exert force when moving. In this way, the torso will also be exercised, so the elliptical machine can exercise the whole body. The elliptical machine is an aerobic exercise. When you perform aerobic exercise, the blood circulation in the body will speed up, and the fat will burn faster. Of course, this effect will only occur after a certain period of continuous exercise. Aerobic exercise can exercise the heart and lungs and consume fat. As long as the exercise method and exercise amount are properly controlled, it is still possible to consume more energy. People often choose an elliptical machine during exercise.

[0003] However, the existing elliptical machine lacks adjustment function, and it is difficult to adjust the user's movement stride according to the actual situation of the user during use, resulting in poor user comfort. Or even if some elliptical machines can adjust the stride, the adjustment method is to directly adjust the length of the swing rod. Such an adjustment method has relatively large limitations and a small adjustment range, and cannot meet the requirements of most users. SUMMARY

[0004] The main technical problem to be solved by the present application is to provide an elliptical machine stride adjustment assembly, which has a relatively large stride adjustment range and is convenient for users of different heights and body types to use.

[0005] In order to solve the above technical problems, the present application provides an elliptical machine stride adjustment assembly, which comprises: a connecting rod, a swing rod, an adjustment arm and a transmission rod.

[0006] One end of the transmission rod is connected to a front crank assembly, and the other end is pivotally connected to one end of the adjustment arm. One end of the swing rod is pivotally connected to the connecting rod, and the other end is rotatably connected to a swing shaft. The adjustment arm and the swing rod are movably connected along the length direction of the adjustment arm to adjust the distance R from the pivot connection end of the adjustment arm to the swing shaft. The distance R is the swing radius of the adjustment arm around the swing shaft. The adjustment arm and the swing rod are connected in the swing direction of the adjustment arm.

[0007] When one end of the transmission rod rotates around the front crank assembly by an arc l, the arc by which the adjusting arm swings around the swing shaft is also l; when the distance R decreases, the swing center angle corresponding to the arc l increases, the swing amplitude of the swing rod driven by the adjusting arm increases, and the distance by which the connecting rod moves from the far end to the near end increases; when the distance R increases, the swing center angle corresponding to the arc l decreases, the swing amplitude of the swing rod driven by the adjusting arm decreases, and the distance by which the connecting rod moves from the far end to the near end decreases.

[0008] In a preferred embodiment: the swing rod is fixedly connected with a sliding sleeve through which the adjusting arm passes, and the adjusting arm has a freedom of movement along the length direction of the sliding sleeve to change the relative position of the adjusting arm and the sliding sleeve, thereby adjusting the distance R between the pivot end of the adjusting arm and the swing shaft.

[0009] In a preferred embodiment: the adjusting arm comprises a body, an inner liner and a handle which are arranged in a nested manner from outside to inside; the handle is provided with a pin along a direction perpendicular to the axial direction of the body, and the body and the inner liner are provided with a clearance opening through which the pin passes; the sliding sleeve is provided with a sliding groove along the length direction, and the sliding groove is connected with at least two clamping grooves; when the pin is placed in the clamping groove, the pin and the clamping groove are limited in the extending direction of the sliding groove.

[0010] In a preferred embodiment: the handle has a rotational freedom around the axial direction of the body relative to the inner liner, so that the handle is rotated relative to the inner liner from a first position to a second position under the action of an external force; when the handle is in the first position, the pin moves into a part of the clearance opening which coincides with the clamping groove; when the handle is in the second position, the pin moves into a part of the clearance opening which coincides with the sliding groove.

[0011] In a preferred embodiment: a resilient member is further arranged between the handle and the inner liner, and the resilient member accumulates an elastic restoring force when the handle is rotated from the first position to the second position.

[0012] In a preferred embodiment: the inner liner and the handle are driven by a stepping motor to adjust the distance R between the pivot end of the adjusting arm and the swing shaft.

[0013] In a preferred embodiment: a handrail is fixedly connected to the swing rod.

[0014] The application further provides an elliptical machine comprising the stride adjusting assembly as described above; the stride adjusting assembly is two sets which are arranged in a spaced manner along the width direction of the elliptical machine.

[0015] In a preferred embodiment: the front crank assembly of the two sets of adjustable stride components is fixedly connected to the pivot of the movement; the movement is used to provide the resistance that needs to be overcome when the front crank assembly rotates.

[0016] In a preferred embodiment: the mechanism includes a worm gear, the two sides of the worm gear extending outward from the axis of rotation, and the worm gear meshing with the worm.

[0017] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0018] This invention provides a component for adjusting the stride length of an elliptical trainer. By changing the swing radius of the adjusting arm around the pendulum axis, the swing amplitude of the adjusting arm can be changed, thereby increasing or decreasing the distance the connecting rod travels from the distal end to the proximal end, thus achieving stride length adjustment. Furthermore, the change in swing amplitude resulting from the change in swing radius is relatively large, thus providing a wide range of stride length adjustment suitable for the needs of most users. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of an elliptical machine in a preferred embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the elliptical machine from another angle in a preferred embodiment of the present invention;

[0021] Figure 3 This is a top view of the elliptical machine in a preferred embodiment of the present invention;

[0022] Figure 4 for Figure 3 Sectional view at position AA;

[0023] Figure 5 for Figure 3 Sectional view at position BB;

[0024] Figure 6 This is an exploded view of the components of the elliptical machine in a preferred embodiment of the present invention;

[0025] Figure 7 This is an exploded view of the elliptical machine parts in a preferred embodiment of the present invention;

[0026] Figures 8-10 This is a schematic diagram of the elliptical machine in the minimum stride setting according to a preferred embodiment of the present invention;

[0027] Figures 11-13 This is a schematic diagram of the elliptical machine in the maximum stride setting according to a preferred embodiment of the present invention; Detailed Implementation

[0028] To make the technical solution and features of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific examples. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art fall within the scope defined by the appended claims.

[0029] refer to Figures 1-7 This embodiment provides an elliptical machine, including a main frame 1, a front base tube 2, a rear base frame 3, and a rear base tube 4; the main frame 1 includes a vertical rod 11, diagonal rods 12 connected to the front and rear sides of the vertical rod 11, and a horizontal rod 13 connected between the ends of the diagonal rods 12; the front end of the horizontal rod 13 has a first arc surface 131 adapted to the front base tube 2, the rear end is fixedly connected to the front end of the rear base frame 3, and the rear end of the rear base frame 3 has a second arc surface 31 adapted to the rear base tube 4.

[0030] The rear base frame 3 has a mounting platform 32 for fixing the rear wheel drive shaft assembly 5; the rear wheel drive shaft assembly 5 includes two mounting seats 51 spaced apart along the width direction of the mounting platform 32, the mounting seats 51 are provided with mounting holes 52, the drive shaft 53 is connected to the mounting holes 52 through bearings 54, the side of the bearing 54 that cooperates with the mounting holes 52 is the fixed side, and the side that cooperates with the drive shaft 53 is the rolling side.

[0031] It also includes two sets of stride adjustment components 6, corresponding to the user's left and right legs respectively. The stride adjustment components 6 include: a connecting rod 61, a swing rod 62, an adjusting arm 63, and a transmission rod 64;

[0032] One end of the transmission rod 64 is connected to the front crank assembly 65, and the other end is pivotally connected to one end of the adjusting arm 63; one end of the swing arm 62 is pivotally connected to the connecting rod 61, and the other end is rotatably connected to the swing shaft 66; the swing shaft 66 is fixed on the left and right sides of the vertical rod 11. The adjusting arm 63 and the swing arm 62 are movably connected along the length direction of the adjusting arm 63 to adjust the distance R from the pivot end of the adjusting arm 63 and the transmission rod 64 to the swing shaft 66, where the distance R is the swing radius of the adjusting arm 63 around the swing shaft 66; the adjusting arm 63 and the swing arm 62 are also linked and cooperated along the swing direction of the adjusting arm 63 to drive the swing arm 62 to move through the swing of the adjusting arm 63.

[0033] When one end of the transmission rod 64 rotates around the front crank assembly 65 through an arc l, the arc of the adjusting arm 63 swinging around the pendulum axis 66 is also l. When the distance R decreases, the swing center angle corresponding to the arc l increases, the swing amplitude of the pendulum 62 driven by the adjusting arm 63 increases, and the distance of the connecting rod 61 from the far end to the near end increases accordingly. When the distance R increases, the swing center angle corresponding to the arc l decreases, the swing amplitude of the pendulum 62 driven by the adjusting arm 63 decreases, and the distance of the connecting rod 61 from the far end to the near end decreases accordingly. The far end and near end of the connecting rod 61 refer to the position closest to the vertical bar 11 and the position furthest from the vertical bar 11 during the movement of the elliptical machine. The distance between the near end and the far end is the stride of the elliptical machine during movement.

[0034] The aforementioned stride adjustment component 6, by changing the swing radius of the adjusting arm 63 around the swing axis 66, can change the swing amplitude of the adjusting arm 63, thereby increasing or decreasing the distance the connecting rod 61 moves from the distal end to the proximal end, thus achieving stride adjustment. Furthermore, the change in swing amplitude resulting from the change in swing radius is relatively large, thus the stride adjustment range is also relatively wide. In this embodiment, a stride variation of 384mm-507mm can be achieved, suitable for the needs of most users.

[0035] In this embodiment, the front crank assembly 65 includes a first crank 651 and a driven pulley 652. A main drive pulley 55 is sleeved on the drive shaft 53. The main drive pulley 55 and the driven pulley 652 are linked by a belt 56, so that when the drive shaft 53 drives the main drive pulley 55 to rotate, the driven pulley 652 also drives the first crank 651 to rotate around the driven pulley 652. A protrusion 653, coaxially fixed to one end of the drive rod 64, is provided at one end of the first crank 651 radially outward from the driven pulley 652. When the first crank 651 rotates around the driven pulley 652, the drive rod 64 also rotates with the first crank 651 around the driven pulley 652. Two spaced-apart first mounting ears 641 extend from the other end of the drive rod 64. One end of the adjusting arm 63 is placed in the cavity formed between the two first mounting ears 641 and is pivotally connected to the first mounting ears 641 by a pin and a nut.

[0036] To realize the rotation of the transmission shaft 53, the two ends of the transmission shaft 53 extend to the outside of the mounting seat 51 to form connecting ends 531, one end of a second crank 661 in the rear crank assembly 66 is fixedly connected with the connecting ends 531, and the other end of the second crank 661 is connected with a roller 662. The bottom of the connecting rod 61 is in rolling cooperation with the roller 662, and when the connecting rod 61 exerts a force on the rear crank assembly 66 to drive the rear crank assembly 66 to rotate around the transmission shaft 53, the roller 662 rolls along the length direction of the connecting rod 61.

[0037] In the embodiment, one end of the connecting rod 61 extends out two second mounting ears 611 arranged at intervals, one end of the swing rod 62 is arranged in a cavity formed between the two second mounting ears 611, and is pivotally connected with the second mounting ears 611.

[0038] In order to provide resistance to the rotation of the front crank assembly 65 to increase the exercise effect, a core 7 is further included, and the front crank assemblies 65 in the two groups of stride adjusting assemblies 6 are respectively fixedly connected with a rotating shaft 71 of the core 7; the core 7 is used for providing resistance that needs to be overcome when the front crank assembly 65 rotates. Specifically, the core 7 includes a worm wheel 73 and a worm 72, the two sides of the worm wheel 73 outwardly extend out the rotating shaft 71 at the shaft center, and the worm wheel 73 is in meshing cooperation with the worm 72. When the front crank assembly 65 rotates, the rotating shaft 71 drives the worm wheel 73 to rotate, and the worm wheel 73 drives the worm 72 to rotate to provide resistance.

[0039] In the embodiment, the cross rod 13 is provided with a mounting plate 131 for mounting the core 7, the mounting plate 131 has a U-shaped groove in the cross section, and the lower end of the core 7 is arranged in the U-shaped groove. Moreover, the rotating shaft 71 is arranged in a mounting hole 81 at one end of the connecting plate 8, and the other end of the connecting plate 8 is fixedly connected with the rear chassis 3.

[0040] In order to realize the adjusting function of the adjusting arm 63, the swing rod 62 is fixedly connected with a sliding sleeve 621 through which the adjusting arm 63 passes, the adjusting arm 63 is inserted into the sliding sleeve and has a freedom degree of movement along the length direction of the sliding sleeve 621, so as to change the relative position of the adjusting arm 63 and the sliding sleeve 621, and then adjust the distance R between the pivot connection end of the adjusting arm 63 and the swing shaft 66 to the swing shaft 66. Specifically, the swing rod 62 has a sleeve 622 sleeved on the swing shaft 66, and the sliding sleeve 621 is fixed on the outer wall of the sleeve 622. Since the sleeve 622 and the swing shaft 66 are pivotally connected, the adjusting arm 63 is also pivotally connected with the swing shaft 66, and when the adjusting arm 63 swings around the swing shaft 66, the adjusting arm 63 drives the swing rod 62 to rotate around the swing shaft 66.

[0041] Specifically, the adjusting arm 63 comprises a body 631, an inner liner 632 and a handle 633 which are nested from outside to inside; one end of the body 631 is pivotally connected with the transmission rod 64, the other end passes through the sliding sleeve 621 and has an opening 6312 for inserting the inner liner 632 and the handle 633. The handle 633 is provided with a pin 634 along a direction perpendicular to the axial direction of the body 631, the body 631 and the inner liner 632 are provided with a clearance opening 6311, 6321 for the pin 634 to pass through; the sliding sleeve 621 is provided with a sliding groove 6211 along the length direction for the pin 634 to slide, the sliding groove 6211 is communicated with three clamping grooves 6212 at different positions along the length direction; when the pin 634 is placed in the clamping groove 6212, the pin 634 and the clamping groove 6212 are limitedly matched along the extending direction of the sliding groove 6211. In this embodiment, three clamping grooves 6212 are taken as an example, as a simple replacement, the number of clamping grooves 6212 can also be increased or reduced as needed.

[0042] In order to enable the pin shaft to move in the sliding groove 6211 and the clamping groove 6212, so as to change the relative position of the inner liner 632 and the handle 633 with the body 631. The handle 633 has a rotational freedom with respect to the inner liner 632 around the axial direction of the body 631, so that the handle 633 is rotated from a first position to a second position with respect to the inner liner 632 under the action of an external force; when the handle 633 is located at the first position, the pin 634 moves to the part where the clearance opening 6311, 6321 is coincided with the clamping groove 6212, at this time the relative position of the inner liner 632 and the handle 633 with the body 631 remains fixed; when the handle 633 is located at the second position, the pin 634 moves to the part where the clearance opening 6311, 6321 is coincided with the sliding groove 6211, at this time the relative position of the inner liner 632 and the handle 633 with the body 631 can be adjusted.

[0043] In order to avoid the pin 634 from sliding into the sliding groove 6211 accidentally, a resilient member 635 is further arranged between the handle 633 and the inner liner 632, the resilient member 635 accumulates elastic restoring force when the handle 633 is rotated from the first position to the second position. Therefore, after the position adjustment is completed, the elastic restoring force released by the resilient member 635 will reset the handle 633 to the first position, so as to ensure that the pin 634 is placed in the clamping groove 6212. Only when the user applies external force to rotate the handle 633 again, the pin 634 will be repositioned in the sliding groove 6211, which effectively avoids the occurrence of misoperation. As a simple replacement of this embodiment, in addition to adjusting the distance R between the pivotally connected end of the adjusting arm 63 and the swing shaft 66 by the user applying external force, the adjustment can also be performed by a stepping motor.

[0044] Finally, in order to reverse the operation of the user, i.e. using both hands to apply force to drive the connecting rod 61, the swing rod 62 is fixedly connected with the handrail 67.

[0045] In use, the elliptical machine described above, the user through the alternating left and right two connecting rod 61 exert a force, so that the connecting rod 61 drive rear crank assembly 66 drive rear transmission shaft 53 rotation, in turn, drive the rear transmission shaft 53 on the main drive wheel 55 rotation. Main drive wheel 55 in turn through the belt 56 drive from the drive wheel 652 rotation. From the drive wheel 652 rotation in turn drive the first crank 651 of the front crank assembly 65 rotation, the first crank 651 drive transmission rod 64 around the first from the drive wheel 652 rotation. Transmission rod 64 rotation in turn drive the transmission rod 64 and the pivot end of the adjusting arm 63 around the swing shaft 66 swing, because the adjusting arm 63 is fixed on the swing rod, so the swing of the adjusting arm 63 in turn drive the swing rod relative to the connecting rod 61 movement, so that the connecting rod 61 in the process of movement has a front end and rear end, the distance between the front end and the rear end is the step. Therefore, this step is determined by the swing amplitude of the adjusting arm 63, then as long as the adjusting arm 63 and the pivot end of the transmission rod 64 to the distance R of the swing shaft 66, can adjust the swing amplitude of the adjusting arm 63, in turn, realize the change of the step.

[0046] The above is only one embodiment of the present application, but the design concept of the present application is not limited to this, any non-essential changes to the present application using this concept, all belong to the act of infringing the scope of the present application.

Claims

1. A component for adjusting the stride of an elliptical trainer, characterized in that... include: Linkage rod, rocker arm, adjusting arm, and transmission rod; One end of the transmission rod is connected to the front crank assembly, and the other end is pivotally connected to one end of the adjusting arm; one end of the swing arm is pivotally connected to the connecting rod, and the other end is rotatably connected to the swing shaft; the adjusting arm and the swing arm are movably connected along the length direction of the adjusting arm to adjust the distance R from the pivot end of the adjusting arm and the transmission rod to the swing shaft, where the distance R is the swing radius of the adjusting arm around the swing shaft; the adjusting arm and the swing arm are linked and cooperated along the swing direction of the adjusting arm; When one end of the transmission rod rotates around the front crank assembly through an arc l, the arc of the adjusting arm swinging around the pendulum is also l. When the distance R decreases, the swing center angle corresponding to the arc l increases, the swing amplitude of the pendulum driven by the adjusting arm increases, and the distance of the connecting rod from the far end to the inlet increases accordingly. When the distance R increases, the swing center angle corresponding to the arc l decreases, the swing amplitude of the pendulum driven by the adjusting arm decreases, and the distance of the connecting rod from the far end to the inlet decreases accordingly.

2. The component for adjusting the stride of an elliptical machine according to claim 1, characterized in that: A sliding sleeve is fixedly connected to the swing arm for the adjusting arm to pass through. The adjusting arm has a degree of freedom of movement along the length of the sliding sleeve to change the relative position of the adjusting arm and the sliding sleeve, thereby adjusting the distance R between the pivot end of the adjusting arm and the transmission rod and the swing shaft.

3. The component for adjusting the stride length of an elliptical machine according to claim 2, characterized in that: The adjusting arm includes a body, an inner liner, and a handle nested from the outside to the inside; a locking pin is provided on the handle along a direction perpendicular to the axis of the body, and clearance openings are provided on the body and the inner liner for the locking pin to pass through; a sliding groove is provided on the sliding sleeve along its length for the locking pin to slide, and at least two slots are connected to the sliding groove; when the locking pin is placed in the slot, the locking pin and the slot are mutually restrained and engaged along the direction of extension of the sliding groove.

4. The component for adjusting the stride of an elliptical machine according to claim 3, characterized in that: The handle has rotational freedom relative to the liner in the axial direction around the body, so that the handle can rotate from a first position to a second position relative to the liner under the action of an external force. When the handle is in the first position, the locking pin moves to the part where the clearance opening coincides with the locking groove. When the handle is in the second position, the locking pin moves to the portion where the clearance opening coincides with the slide groove.

5. The component for adjusting the stride length of an elliptical machine according to claim 4, characterized in that: An elastic element is also provided between the handle and the inner lining. When the handle is rotated from the first position to the second position, the elastic element accumulates elastic restoring force.

6. The component for adjusting the stride of an elliptical machine according to claim 2, characterized in that: The liner and handle are driven by a stepper motor to adjust the distance R between the pivot end of the adjusting arm and the transmission rod and the swing shaft.

7. The component for adjusting the stride length of an elliptical machine according to claim 1, characterized in that: A handrail is fixedly connected to the swing arm.

8. An elliptical machine, characterized in that... The elliptical machine includes the stride adjustment components as described in any one of claims 1-7; the stride adjustment components are in two sets, spaced apart along the width direction of the elliptical machine.

9. An elliptical machine according to claim 8, characterized in that: The front crank assembly in each of the two sets of adjustable stride components is fixedly connected to the pivot of the movement; the movement is used to provide the resistance that needs to be overcome when the front crank assembly rotates.

10. An elliptical machine according to claim 9, characterized in that: The mechanism includes a worm gear and a worm shaft, with the rotating shaft extending outward from the center on both sides of the worm gear, and the worm gear meshing with the worm shaft.

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