TWI872988B - A treadmill with a guide wheel assembly - Google Patents

Abstract

A treadmill with a guide wheel assembly, comprising a base frame unit, a front wheel unit shafted on the base frame unit, a rear guide unit mounted on the base frame unit, a drive unit, and a running belt unit. The rear guide unit includes a pair of positioning plates and two guide wheel assemblies, each guide wheel assembly having multiple rolling elements. The drive unit is capable of driving the front wheel unit to rotate. The running belt unit is arranged around the outside of the front wheel unit and the rear guide unit, and is driven by the front wheel unit to operate relative to the base frame unit. By utilizing the arrangement of the rear guide unit, cost reduction, convenient assembly, and achieving lightweight objectives can be attained.

Description

Track treadmill with guide wheel set

The present invention relates to a treadmill, in particular to a crawler treadmill with a guide wheel assembly.

There is a crawler treadmill (disclosed in the patent case of Republic of China Certificate No. M563897), which includes a circulation mechanism, a frame, a transmission shaft and an electromagnetic brake. The circulation mechanism (or running belt) has two transmission belts and a plurality of plates connected to the two transmission belts in parallel. The frame has a main shaft and a secondary shaft, the main shaft is connected to a pair of driving wheels, one of the driving wheels is connected to a belt pulley that can rotate in the same direction. The secondary shaft is connected to two driven wheels, the driven wheels and the driving wheels jointly support the transmission belt, and the driving wheels are engaged or bitten with the transmission belt. The transmission shaft is rotatably arranged on the frame, and one of the two ends of the transmission shaft maintains a transmission relationship with the aforementioned belt pulley. The electromagnetic brake is connected to the other end of the transmission shaft.

Although the above-mentioned crawler treadmill can achieve the expected operation purpose, the structure of the secondary shaft connecting the two driven wheels is not only costly and heavy. In addition, when the whole is assembled, because the circulation mechanism is a closed ring, when the circulation mechanism is inserted into the frame, the driving wheels and the driven wheels have a certain axial width, and the circulation mechanism must be aligned with the driving wheels and the driven wheels, otherwise there is easy interference and excessive friction, and the assembly operation is more troublesome and time-consuming.

Therefore, the purpose of the present invention is to provide a crawler treadmill with a guide wheel assembly that can solve the problems of the prior art.

Therefore, the crawler treadmill with a guide wheel assembly of the present invention comprises a base frame unit, a front wheel unit, a rear guide unit, a drive unit and a running belt unit. The front wheel unit is axially arranged on the base frame unit. The rear guide unit is mounted on the base frame unit and is spaced apart from the front wheel unit along a first axial direction. The rear guide unit comprises a pair of positioning plates and two guide wheel assemblies axially arranged on the positioning plates, respectively. The positioning plates are spaced apart along an axis perpendicular to the first axial direction. Each guide wheel assembly has a plurality of rollers spaced apart around the axis. The drive unit is mounted on the base frame unit and can drive the front wheel unit to rotate. The running belt unit is wound around the front rotating wheel unit and the outside of the rear guide unit. The running belt unit is driven by the front rotating wheel unit and can rotate relative to the base frame unit.

The effect of the present invention is that by utilizing the positioning plates of the rear guide unit and the guide wheel assemblies respectively axially arranged on the positioning plates, the overall structure is simple, the assembly is easy and fast, and the cost can be reduced.

Before the present invention is described in detail, it should be noted that similar components are represented by the same reference numerals in the following description.

1 and 2 , an embodiment of a crawler treadmill with a guide wheel assembly of the present invention includes a base unit 10, a handrail unit 20, a front rotating wheel unit 30, a rear guide unit 40, a driving unit 50, a support unit 60 and a running belt unit 70.

As shown in FIGS. 3, 4 and 5, the chassis unit 10 includes a front end 11, a rear end 12 opposite to the front end 11 along a first axis X, a pair of longitudinal beams 13 extending from the front end 11 to the rear end 12 and extending along the first axis X, and a plurality of transverse beams 14 intersecting and connected to the longitudinal beams 13 and extending along a second axis Y perpendicular to the first axis X. Referring to FIG. 9 again, each of the longitudinal beams 13 has a main beam member 131 and two side end covers 132 detachably mounted on the main beam member 131. The main beam member 131 has a protrusion 133 corresponding to the rear end 12, and an adjustment screw 134 screwed on the protrusion 133.

The armrest unit 20 is mounted on the longitudinal beams 13 of the base unit 10 and corresponds to the front end portion 11.

The front rotating wheel unit 30 is axially disposed on the longitudinal beams 13 of the base frame unit 10 and corresponds to the front end portion 11.

4, 6 to 8, the rear guide unit 40 is mounted on the base unit 10 and is spaced apart from the front wheel unit 30 along the first axial direction X. The rear guide unit 40 includes a pair of positioning plates 41 and two guide wheel assemblies 42 axially disposed on the positioning plates 41, respectively.

The positioning plates 41 are arranged at intervals along an axis L perpendicular to the first axial direction X. Each positioning plate 41 is adjustably mounted on the main beam 131 of the corresponding longitudinal beam 13, and each positioning plate 41 has a main body 411, a bent plate 412 intersecting and connected to the main body 411, and a mounting plate 413 intersecting and connected to the bent plate 412. The main body 411 has a plurality of long slots 414 extending along the first axial direction X, a plurality of locking screws 415 respectively penetrating the long slots 414 and screwed to the corresponding longitudinal beam 13, and a push portion 416. The mounting plate 413 has a semicircular periphery 417 around the axis L, and a plurality of mounting holes 418 located inside the periphery 417 and spaced around the axis L. The distance between the main plates 411 of the positioning plates 41 is greater than the distance between the mounting plates 413 (see FIG. 7 ). Referring to FIG. 9 , the adjusting screw 134 can be pushed against the pushing portion 416.

Each guide wheel assembly 42 has a plurality of rollers 421 disposed at intervals around the axis L, each of which has a bearing 422 and a bolt 423 passing through the bearing 422 and screwed to the corresponding positioning plate 41. Some of the rollers 421 of each guide wheel assembly 42 also have a wheel sleeve 424 fixed to the outside of the corresponding bearing 422. The wheel sleeves 424 of each guide wheel assembly 42 are disposed at intervals around the axis L, and at least two rollers 421 having only bearings 422 are disposed between two rollers 421 having the wheel sleeves 424. Each wheel sleeve 424 has an outer circumferential surface 425 and a stopper 426 protruding from the outer circumferential surface 425. The outer circumferential surface 425 is substantially parallel to the axis L. The stopper 426 stops at a corresponding side edge of the running belt unit 70 and limits the running belt unit 70 corresponding to the axis L. The stopper 426 of each wheel sleeve 424 of the rear guide unit 40 has an inclined surface 427.

The driving unit 50 is mounted on the base unit 10 and can drive the front wheel unit 30 to rotate. The driving unit 50 is a motor.

The support unit 60 is located between the front end 11 and the rear end 12, and includes a pair of support frames 61 extending along the first axis X and mounted on the longitudinal beams 13, and a plurality of roller members 62 mounted on the support frames 61 and arranged at intervals along the first axis X. The mounting positions of the roller members 62 of the support unit 60 correspond to the guide wheel assemblies 42, respectively.

The running belt unit 70 is wound around the front wheel unit 30 and the rear guide unit 40. The running belt unit 70 is driven by the front wheel unit 30 to rotate relative to the chassis unit 10. The running belt unit 70 includes two belt members 71 respectively located on the outer sides of the mounting plates 413 along the axis L, and a plurality of pedal members 72 respectively connected to the belt members 71. Referring to FIG. 7 , the belt members 71 are arranged at intervals along the second axis Y. The pedal members 72 are arranged around the outer sides of the belt members 71 and at intervals, and each pedal member 72 extends along the second axis Y.

The endless belt members 71 are arranged around the front rotating wheel unit 30 and the rear guide unit 40, and the endless belt members 71 corresponding to the rear end portion 12 are arranged around the outer circumference 425 of the wheel sleeve 424 of the part of the roller 421, and the outside of the roller 421 having only the bearing 422. As shown in FIG7 and FIG8, the endless belt members 71 are respectively located on the outer side of the corresponding stopper portions 426 along the axis L, and can be guided and limited by the inclined surface portions 427.

In order to further understand the effects of the cooperation of the various components of the present invention, the technical means used, and the expected effects to be achieved, the following description will be given. It is believed that this will provide a deeper and more specific understanding of the present invention.

Referring to FIGS. 2 to 4 , to assemble, before the armrest unit 20 is mounted on the base unit 10, the operator can first assemble the front wheel unit 30, the rear guide unit 40, and the support unit 60 on the base unit 10. At this time, the side end covers 132 are not assembled on the main beams 131. The operator can then adjust the positioning plates 41 of the rear guide unit 40 to the most retracted state relative to the main beams 131.

At this time, the running belt unit 70 can be inserted into the base unit 10, and the loop members 71 are respectively corresponding to the supporting units 60 and the rollers 421 of the rear guide units 40. Then, the positioning plates 41 are adjusted to move outward relative to the main beams 131 until the rollers 421 stop at the loop members 71, and the running belt unit 70 has sufficient tension.

The side covers 132 are then assembled on the main beam members 131 , and the handrail unit 20 is installed on the base frame unit 10 .

As shown in FIG. 1 and FIG. 5 to FIG. 9 , after the overall assembly is completed, the driving unit 50 is started to drive the front wheel unit 30 to rotate, and the front wheel unit 30 drives the running belt unit 70 to operate. When the running belt unit 70 operates, the rollers 421 of the rear guide unit 40 and the rollers 62 of the support unit 60 can be used to achieve smooth operation.

The effects that the present invention can produce are summarized as follows:

First, the overall structure of the rear guide unit 40 is simple, the manufacturing cost is low, and the weight is light. Moreover, when the entire assembly is to be performed, since the axial width of the rollers 421 corresponding to the axis L is small, the running belt unit 70 is inserted into the rear guide unit 40, and it is not easy to cause interference and excessive friction, and the assembly operation is simpler and time-saving.

Second, each of the rolling elements 421 of the rear guide unit 40 has a bearing 422, which is easy to obtain and install. Some rolling elements 421 also have a wheel sleeve 424 fixed to the outside of the corresponding bearing 422, and the assembly of the wheel sleeve 424 and the corresponding bearing 422 is also quite easy.

3. The adjustment screws 134 are operated to push the corresponding push portions 416 and move the positioning plates 41 along the first axis X, thereby adjusting the tension of the running belt unit 70. The operation of adjusting the tension of the running belt unit 70 is quite easy.

Fourth, by utilizing the positioning plates 41 of the rear guide unit 40 and the guide wheel assemblies 42 axially mounted on the positioning plates 41, the overall structure is simple, the assembly is easy and quick, and the cost can be reduced.

In summary, the crawler treadmill with a guide wheel assembly of the present invention can not only achieve the expected operating purpose, but also has simple overall structural parts and is easy to manufacture and assemble, and can indeed achieve the purpose of the present invention.

However, the above is only an embodiment of the present invention and should not be used to limit the scope of implementation of the present invention. All simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the content of the patent specification are still within the scope of the present patent.

10: Base unit 11: Front end 12: Rear end 13: Longitudinal beam 131: Main beam 132: Side cover 133: Boss 134: Adjustment screw 14: Cross beam 20: Handrail unit 30: Front wheel unit 40: Rear guide unit 41: Positioning plate 411: Main body 412: Bending plate 413: Mounting plate 414: Long groove 415: Locking screw 416: Pushing part 417: Periphery 418: Mounting hole 42: Guide wheel assembly 421: Rolling member 422: Bearing 423: Bolt 424: wheel hub 425: outer peripheral surface 426: stopper 427: inclined surface 50: drive unit 60: support unit 61: support frame 62: roller component 70: running belt unit 71: belt component 72: pedal component L: axis X: first axis Y: second axis

Other features and functions of the present invention will be clearly presented in the embodiments with reference to the drawings, wherein: FIG. 1 is a three-dimensional assembly diagram of an embodiment of the present invention having a track treadmill with a guide wheel assembly; FIG. 2 is a three-dimensional exploded schematic diagram of a portion of the embodiment, showing a running belt unit detached from a chassis unit; FIG. 3 is a partial enlarged schematic diagram of FIG. 2; FIG. 4 is a three-dimensional exploded schematic diagram of FIG. 3; FIG. 5 is a combined cross-sectional view of the embodiment; FIG. 6 is a partial enlarged schematic diagram of FIG. 5; FIG. 7 is a cross-sectional view along line Ⅶ-Ⅶ in FIG. 5; FIG. 8 is a partial enlarged schematic diagram of FIG. 7; and FIG. 9 is a partial three-dimensional schematic diagram of the embodiment, illustrating a perspective view of a longitudinal beam.

10: Chassis unit

12: Rear end

13: Vertical beam

131: Main beam

132: Side cover

14: Beam

40: Rear guidance unit

41: Positioning plate

411: Mainboard

412: Bending plate

413: Install the board

415: Locking screw

417: surroundings

42: Guide wheel assembly

421: Rolling parts

422: Bearings

423: Bolts

424: Wheel hub

60: Support unit

61: Support frame

62: Roller parts

L: axis

X: First axis

Y: Second axis

Claims (9)

A crawler treadmill with a guide wheel assembly, comprising: a chassis unit; a front wheel unit, axially arranged on the chassis unit; a rear guide unit, mounted on the chassis unit and spaced apart from the front wheel unit along a first axial direction, the rear guide unit comprising a pair of positioning plates and two guide wheel assemblies, respectively axially arranged on the positioning plates, the positioning plates being spaced apart along an axis perpendicular to the first axial direction, and each guide wheel assembly having a plurality of rollers spaced apart around the axis; a drive unit, mounted on the chassis unit, and capable of driving the front wheel unit to rotate; and A running belt unit is wound around the front rotating wheel unit and the outside of the rear guide unit. The running belt unit is driven by the front rotating wheel unit and can move relative to the base frame unit. A crawler treadmill with a guide wheel assembly as described in claim 1, wherein the rolling parts of each guide wheel assembly of the rear guide unit each have a bearing and a bolt member that passes through the bearing and is screwed to the corresponding positioning plate. A crawler treadmill with a guide wheel assembly as described in claim 2, wherein some rolling elements of each guide wheel assembly of the rear guide unit also have a wheel sleeve fixed to the outside of the corresponding bearing, the wheel sleeves of each guide wheel assembly are arranged at intervals around the axis, and at least two rolling elements with only bearings are arranged between two rolling elements with the wheel sleeves. A crawler treadmill with a guide wheel assembly as described in claim 3, wherein each wheel sleeve of the rear guide unit has an outer peripheral surface and a stopping portion protruding from the outer peripheral surface, the outer peripheral surface is substantially parallel to the axis, the stopping portion stops at a corresponding side edge of the running belt unit, and limits the running belt unit corresponding to the axis. A crawler treadmill with a guide wheel assembly as described in claim 4, wherein the stopping portion of each wheel sleeve of the rear guide unit has a sloped portion. A crawler treadmill with a guide wheel assembly as described in claim 1, wherein the base frame unit has a front end portion corresponding to the front rotating wheel unit, a rear end portion opposite to the front end portion and corresponding to the rear guide unit, a pair of longitudinal beams extending from the front end portion to the rear end portion and extending along the first axial direction, at least one transverse beam intersecting and connected to the longitudinal beams and extending along a second axial direction perpendicular to the first axis, and the positioning plates of the rear guide unit are adjustably mounted on the corresponding longitudinal beams. A crawler treadmill with a guide wheel assembly as described in claim 6, wherein each positioning plate of the rear guide unit has a plurality of long grooves extending along the first axial direction, a plurality of locking screws respectively inserted through the long grooves and screwed to the corresponding longitudinal beams, and a push portion, the longitudinal beams of the base unit each have a protrusion, and an adjustment screw screwed to the protrusion and capable of pushing the push portion, and operating the adjustment screw can push the corresponding positioning plate to move along the first axial direction and adjust the tension of the treadmill belt unit. A crawler treadmill with a guide wheel assembly as described in claim 7, wherein each positioning plate of the rear guide unit also has a main plate body, a bent plate body intersecting and connected to the main plate body, and a mounting plate body intersecting and connected to the bent plate body, the rolling members are rotatably mounted on the corresponding mounting plates, and the distance between the main plates of the positioning plates is greater than the distance between the mounting plates. A crawler treadmill with a guide wheel assembly as described in claim 8, wherein the mounting plate of the rear guide unit has a periphery in a semicircular shape around the axis, and a plurality of mounting holes located on the inner side of the periphery and spaced around the axis, and the mounting holes are provided for rotatable mounting of the rolling parts.