CN210186333U - Pivoting mechanism of folding treadmill - Google Patents

Abstract

The utility model provides a pivoting mechanism of a folding running machine, which comprises a gear box, a first gear and a second gear which are fixedly arranged in the gear box, and a first intermediate gear and a second intermediate gear which are rotatably arranged in the gear box, wherein the first gear, the first intermediate gear, the second intermediate gear and the second gear are meshed in sequence; two sides of the gear box are respectively pivoted to the rear end of the front running platform and the front end of the rear running platform; the first gear is fixedly connected to the front running platform, and the second gear is fixedly connected to the rear running platform.

Description

Pivoting mechanism of folding treadmill

Technical Field

The utility model belongs to the treadmill field, in particular to a pivoting mechanism of a folding treadmill.

Background

The treadmill is a standing body-building apparatus, which is formed by changing the principle of a speed transmission belt. However, the running table sold in the market has a large volume, is stored when being used in a home place, and is inconvenient to carry.

CN207769063U discloses a running table, the whole running table includes a front running table and a rear running table, the rear end of the front running table is hinged with the front end of the rear running table through a hinge mechanism, the included angle between the front running table and the rear running table can be adjusted, when the running table is in a non-working state, the front running table and the rear running table are folded, the front running table can be folded on the rear running table, and the rear running table can be folded on the front running table, so that the accommodation area is greatly reduced; when the running table is in a working state, the front running table and the rear running table are opened, and the front running table and the rear running table are in the same horizontal plane at the moment, namely the included angle is 180 degrees; however, as shown in fig. 1, the hinge joint of the hinge structure is large, and when the hinge structure is folded, the rear end of the hinge structure has a protruding hinge structure, firstly, the protruding hinge structure has a certain limit for accommodating, and secondly; secondly, the bulge of the hinge mechanism is easy to scratch the storage environment, and the safety of the hinge mechanism is threatened; finally, when the front running table or the rear running table rotates, the rotation resistance of the front running table or the rear running table is difficult to control, and an operator is difficult to control the folding process.

SUMMERY OF THE UTILITY MODEL

The utility model provides a pivoting mechanism of a folding running machine, which comprises a gear box, a first gear and a second gear which are fixedly arranged in the gear box, and a first intermediate gear and a second intermediate gear which are rotatably arranged in the gear box, wherein the first gear, the first intermediate gear, the second intermediate gear and the second gear are meshed in sequence;

two sides of the gear box are respectively pivoted to the rear end of the front running platform and the front end of the rear running platform; the first gear is fixedly connected to the front running platform, and the second gear is fixedly connected to the rear running platform.

Preferably, the pivoting mechanism further comprises a first shaft, a first intermediate shaft, a second intermediate shaft and a second shaft;

the first pivot penetrates through the gear box and then is fixedly connected with the rear end of the front running table, and the first gear is fixedly arranged on the first shaft;

the second shaft pivot penetrates through the gear box and then is fixedly connected with the front end of the rear running platform, and the second gear is fixedly arranged on the second shaft;

the first intermediate shaft is fixed in the gear box, and the first intermediate gear is pivoted on the first intermediate shaft;

the second intermediate shaft is fixed inside the gear box, and the second intermediate gear is pivoted on the second intermediate shaft.

Preferably, the cross section of the gear box is oval or circular, and the upper surface of the gear box does not protrude out of the horizontal plane of the front running table and the rear running table.

As a preference, the first and second liquid crystal compositions are,

the first shaft and the second shaft are non-circular shafts;

the first gear is provided with a non-circular hole a penetrating through the first gear, two side walls of the gear box are provided with a first pivot hole a and a second pivot hole a which are concentric with the non-circular hole, and the first shaft is matched with the non-circular hole a and is pivoted through the first pivot hole a and the second pivot hole a;

the second gear has a non-circular hole b penetrating through it, the two side walls of the gear box are provided with a first pivot hole b and a second pivot hole b which are concentric with the non-circular hole, and the second shaft is adapted to the non-circular hole b and is pivoted through the first pivot hole b and the second pivot hole b.

Preferably, a first circumferential blocking wall extends towards the inner side of the first gear, a second circumferential blocking wall extends towards two sides of the inner side of the second gear, and a first limiting step and a second limiting step which are in limiting fit with the first circumferential blocking wall and the second circumferential blocking wall are formed inside the gear box.

Preferably, the first intermediate shaft and the second intermediate shaft are both circular shafts fixedly mounted inside the gears, the first intermediate gear and the second intermediate gear are provided with a first pivot hole and a second pivot hole penetrating through the first intermediate shaft and the second intermediate shaft, the first intermediate shaft is pivoted through the first pivot hole, and the second intermediate shaft is pivoted through the second pivot hole.

Preferably, both ends of the first intermediate gear and the second intermediate gear abut against the inside of the gear case.

Preferably, both ends of the first intermediate gear and the second intermediate gear abut against a protrusion formed inside the gear case.

Preferably, the gear case has a circumferential wall and two side walls, wherein the first side wall and/or the second side wall is detachably coupled to both sides of the circumferential wall.

The utility model also provides a treadmill, this treadmill include before run platform and back run platform and at least one above-mentioned pivot mechanism, through this pivot mechanism of at least one, before run platform and back run the collapsible to another party top of platform any party.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the pivoting mechanism provided by the utility model can obviously reduce the folding seam between the front running platform and the rear running platform; improve the comfort of running, reduce the post processing cost.

2. The utility model provides a pivot mechanism adopts the gear assembly, has suitable rotation resistance, and the operation is steerable, and the security improves, runs the platform not fragile.

3. The utility model provides a pivot mechanism does not protrude in running the mesa, conceals between running the platform, than current folding treadmill, runs a surperficial level and smooth, and the comfort level obviously increases, accomodates the volume and further reduces, and factor of safety improves, can not fish tail external environment.

Drawings

Fig. 1 is a schematic view of a folding running platform of a running platform disclosed in the prior art;

fig. 2 is a schematic structural view of the foldable running table of the running table provided by the present invention;

fig. 3 is a schematic view of a split structure of the running table folding running table provided by the present invention;

fig. 4 is a schematic diagram of the engagement of the first gear, the intermediate gear set and the second gear according to the present invention;

FIG. 5 is a schematic view of the front and rear connection seats of the present invention

Fig. 6 is a cross-sectional view of the pivot mechanism provided by the present invention;

fig. 7 is a sectional view of the front connecting seat and the gear box provided by the present invention;

FIG. 8 is a sectional view of a gear case A according to the present invention;

fig. 9 is a schematic view of the folding process provided by the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "front end", "rear end", "front side", "rear side", "up", "down", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "over" and "above" the second feature includes the first feature being directly on and obliquely above the second feature.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 2, the utility model provides a foldable running platform of running platform, fig. 1 shows the structural schematic diagram of the running platform in the open state, the running platform comprises a front running platform 1, a rear running platform 2 and at least one group of pivoting mechanism 3 connecting the front running platform and the rear running platform, and when the running platform is in the open state, the included angle between the front running platform and the rear running platform is 180 degrees; referring to fig. 3, the pivot mechanism 3 includes: a first shaft 31 fixedly mounted on the front deck 1; a second shaft 32 fixedly mounted on the rear deck 2; a first gear 33 fixedly provided on the first shaft 31; a second gear 34 fixedly provided on the second shaft 32; through this first gear 33 and the cooperation of second gear 34, run platform 1 before and run any one side of platform 2 after and can be folded in the top of another party, the utility model provides a gear assembly provides the rotating resistance of folding in-process, and the operation controllability reinforcing, and it runs the platform before and the gap of running the platform after reduces, has promoted the comfort level of running.

In some preferred embodiments of the present invention, referring to fig. 3 and 4, the pivoting mechanism further includes an intermediate gear set 35 rotatably installed between the first gear 33 and the second gear 34, wherein the first gear 33, the intermediate gear set 35 and the second gear 31 are sequentially engaged; the rotation of one of the front running table 1 and the rear running table 2 is sequentially meshed through the first gear 33, the middle gear set 35 and the second gear 33, the angular speed of the front running table and the rear running table is transmitted, the central gear set can avoid overlarge wheel diameters of the first gear and the second gear, and if the wheel diameters protrude out of the running tables, the defects of reduced running comfort, unsmooth overall design, low safety and the like exist, so the utility model adopts the middle gear set to transmit the angular speed; specifically, the intermediate gear set 35 includes at least a first intermediate gear 351 and a second intermediate gear 352, the first intermediate gear 351 is meshed with the first gear 33 and the second intermediate gear 352, and the second intermediate gear 352 is further meshed with the second gear 34; it can be understood that a plurality of even-number gear sets can be arranged, however, the excessive gear sets can cause the connection gap between the front running platform and the rear fort to be too large, the seamless connection of the central area between the front running platform 1 and the rear running platform 2 cannot be realized, and the running comfort is greatly reduced.

In some preferred embodiments of the present invention, as shown in fig. 1 to 7, in order to accommodate the first gear, the second gear and the central gear set, the pivoting mechanism provided by the present invention further comprises a gear box 36, wherein two sides of the gear box 36 are respectively pivoted to the rear end of the front running platform 1 and the front end of the rear running platform 2, so that the rotation of one of the front running platform 1 and the rear running platform 2 can drive the gear box 36 to rotate; as shown in fig. 4, the first gear 33, the first intermediate gear 351, the second intermediate gear 352 and the second gear 34 are sequentially arranged inside the gear box, the gear box provided by the utility model conceals each gear and other parts therein, and the design has aesthetic feeling and improved safety, and in addition, the gear box is arranged at the joint of the front running table and the rear running table as a pivot body and rotates along with the rotation of the front running table or the rear running table.

The utility model can adopt a plurality of mounting structures to assemble and mount the gear box, the first shaft, the first gear, the second shaft, the second gear and the central gear group, so as to realize the mutual folding of the front running platform and the rear fort through the meshing transmission of the gears; in one of the preferred embodiments, the utility model provides a mounting mechanism, it specifically is: as shown in fig. 3, 6 and 8, the first shaft 31 is pivoted through the gear box 36 and fixedly mounted at the rear end region of the front treadmill 1, and the second shaft 32 is pivoted through the gear box 36 and fixedly mounted at the front end region of the rear treadmill 2; and in order to rotatably mount the first intermediate gear 351 and the second intermediate gear 352 inside the gear box 36, a first intermediate shaft 8 and a second intermediate shaft 9 are installed inside the gear box 36, the first intermediate gear 351 is pivoted through the first intermediate shaft 8, and the second intermediate gear 352 is pivoted through the second intermediate shaft 9; further, as shown in fig. 3 and 5, the first shaft 31 and the second shaft 32 are both square shafts (non-circular shafts), as shown in fig. 4, the first gear 33 and the second gear 34 respectively have a non-circular hole (square hole) a331 and a non-circular hole (square hole) b341 penetrating therethrough and engaged with the non-circular shaft, the first shaft 31 and the second shaft 32 are respectively matched with the square hole a331 and the square hole b341, in this way, the first gear 33 and the second gear 34 are respectively in positioning fit with the first shaft 31 and the second shaft 32, since the first shaft 31 and the second shaft 32 are fixedly connected to the front running platform 1 and the rear running platform 2, the first gear 33 and the second gear 34 are also fixedly connected to the front running platform 1 and the rear fort 2 respectively, so that the first gear 33, the first shaft 31 and the front running board 1 form an integral fixed structure, and the second gear 34, the second shaft 32 and the rear running board 2 form an integral fixed structure.

In some preferred embodiments of the present invention, the first gear 33, the second gear 34 and the intermediate gear set 35 are in limit fit with the inside of the gear box 36, referring to fig. 8, the first gear 33 extends from the inside of the gear box towards both sides to form a first circumferential retaining wall 332 in limit fit with the gear box, the second gear 34 extends from the inside of the gear box towards both sides to form a second circumferential retaining wall 342 in limit fit with the gear box, and the inside of the gear box 36 is formed with a first limit step 363 and a second limit step 364 in limit fit with the first circumferential retaining wall 332 and the second circumferential retaining wall 342, so as to ensure that the first gear 33 and the second gear 34 are fixedly mounted inside the gear box.

It can be understood that the first intermediate gear and the second intermediate gear rotate along with the rotation of the running platform, and do not displace in other directions, specifically, both sides of the first intermediate gear and the second intermediate gear can be abutted against the inside of the gear box to play a role in stopping, and can also be abutted against a protruding part formed in the gear box; the specific structural form is as follows: the gear box 36 has a circumferential wall 365 and two side walls (a first side wall 366 and a second side wall 367), wherein the first side wall 366 and/or the second side wall 367 are detachably combined on two sides of the circumferential wall 365, the first side wall 366 and the second side wall 367 extend to form a corresponding first protrusion 368 and a corresponding second protrusion 369 towards the first intermediate gear 36, the two side walls extend to form a corresponding third protrusion 370 and a corresponding fourth protrusion 371 towards the second intermediate gear 36, the first protrusion 368 and the second protrusion 369 are abutted against two ends of the first intermediate gear 351, and the third protrusion 370 and the fourth protrusion 371 are abutted against two ends of the second intermediate gear, so as to prevent the first intermediate gear and the second intermediate gear from being displaced towards the two side walls of the gear box, and ensure that only pivoting movement and no lateral displacement exist.

It can be understood that, in order to ensure the folding and turning between the front running platform 1 and the rear running platform 2, with reference to fig. 1 and 5, a folding space 5 is reserved between the rear end of the front running platform and the front end of the rear running platform.

In some preferred embodiments of the present invention, as shown in fig. 3 and 5, the rear end of the front running board 1 has a front connecting seat 37, and the front end of the rear running board has a rear connecting seat 38, which cooperates with the front connecting seat structure to allow one of the front running board and the rear running board to rotate toward the other; a tangent plane a 110 formed on the rear side of the front connecting seat is matched with a tangent plane b 210 formed on the front side of the rear connecting seat to form a folding space 5, as shown in fig. 6, the front connecting seat 37 and the rear connecting seat 38 integrally form an accommodating groove 300 for the gear box 36 to be pivoted therein, it can be understood that the front running platform and the rear running platform are in the same horizontal plane, and the upper surface of the gear box 36 does not protrude from the horizontal plane, and is preferably level with the horizontal plane; as shown in fig. 7, the first shaft 31 is pivotally inserted through the gear box 36 and fixed at the rear ends thereof in the front connecting seat 37; the second shaft 32 is fixed in the rear connecting seat 38 through the rear ends of the gear boxes 36; further, referring to fig. 8, two side walls of the gear box 36 are provided with pivot holes for the first shaft 31 and the second shaft 32 to pivot through, so that when one of the front running board and the rear running board rotates toward the other, the gear box pivots along with the rotation of one of the front running board and the rear running board.

Still further, as shown in fig. 6, preceding connecting seat 37 has location step 371, back connecting seat 38 has the spacing location boss 381 of location step 371, runs platform 1 before this and runs platform 2 after by open state when converting into fold condition, location boss 381 can follow the removal of location step 371, removes spacing cooperation, refer to fig. 4, location boss and location step have the complex tapering design, at this moment, make things convenient for spacing cooperation and remove spacing cooperation, guaranteed folding operation's smoothness nature.

In the embodiment, the treadmill comprises two pivoting mechanisms which are symmetrical relative to the central axis of the front treadmill, and as shown in fig. 1, the two pivoting mechanisms are positioned at the side areas of the front treadmill and the rear treadmill; the utility model provides a preferred race platform structure, combine fig. 1 and fig. 2, the rear side region of preceding race platform can be divided into two avris regions 12,13 ((first avris region a 12, second avris region a 13)) and central region a 11, first avris region a, second avris region a form in the both sides of central region a, two avris regions a 12,13 relative to central region a 11 towards the front end direction concave establish in order to form notch a 121, 131, these two notches a 121, 131 all fixed arrangement have preceding connecting seat 37;

the front side area of the rear running board can be divided into two side areas b22 and 23 (a first side area b22 and a second side area b 23) and a central area b21, the first side area b and the second side area b are formed at two sides of the central area b, the two side areas b22 and 23 are recessed towards the rear end direction relative to the central area b21 to form notches b221 and 231, and the two notches b221 and 231 are fixedly provided with the rear connecting seat 38;

the rear end of the central area a 11 abuts against the front end of the central area b21, the rear end of the front connecting seat 37 abuts against the front end of the rear connecting seat 38, and preferably, the abutting seam formed between the central area a 11 and the central area b21 is on the same axis as the abutting seam formed between the front connecting seat 37 and the rear connecting seat 38.

The front connector holder 37 has a mounting base a371, a back plate a372 formed above the mounting base a371, and a first side plate a373 and a second side plate a374 formed on two sides of the back plate a372, the first side plate a373, the second side plate a374 and the back plate a372 are combined to form a slot a 377, and the mounting base a371 has a positioning step 370 formed toward the rear connector holder.

The rear connecting seat 38 has a mounting base b381, a back plate b382 formed above the mounting base b381, and a first side plate b383 and a second side plate b384 formed at two sides of the back plate b382, the first side plate b383, the second side plate b384 and the back plate b382 are combined to form a slot b387, the mounting base b381 is formed with a positioning boss 380 facing the front connecting seat, and the positioning boss 380 is in positioning fit with the positioning step 370.

The slot a and the slot b are disposed opposite to each other, and the slot a and the slot b are integrally formed into a receiving slot 300 for the gear box 36 to pivot therein.

In detail, with reference to fig. 3, 4 and 6, the first side plate a373 and the second side plate a374 are formed with corresponding first mounting hole a375 and second mounting hole a 376, the first gear 33 is formed with non-circular hole a331 penetrating therethrough, two side walls of the gear case 36 are provided with first pivot hole a 361 and second pivot hole a 362 concentric with the non-circular hole a331, the first mounting hole a375, the second mounting hole a 376, the non-circular hole a331 and the first pivot hole a 361 and the second pivot hole a 362 are concentrically arranged, referring to fig. 6, the first shaft 31 is pivoted through the first pivot hole a 361 and the second pivot hole a 362 after passing through the non-circular hole a331 of the first gear, and its outer end is fixed in the first mounting hole a375 of the first side plate a373 by a fastener 6 (screw), and its inner end is inserted in the second mounting hole a 376, it can be understood that the first mounting hole a close to the outer side is a fastening hole, such as a screw hole, and the second mounting hole a close to the inner side is a non-circular hole, so that the first mounting hole a is in limit fit with the square first shaft 31, and the first shaft is prevented from being removed from the front connecting seat.

In order to mount the second shaft, the same structural form as above is adopted, specifically, the first side plate b383 and the second side plate b384 are formed with corresponding first mounting hole b 385 and second mounting hole b376, the second gear 34 is formed with non-circular hole b341 penetrating therethrough, the gear box 36 is provided with first pivot hole b363 and second pivot hole b (not shown) concentric with the non-circular hole b341, the first mounting hole b 385, the second mounting hole b376, the non-circular hole b341 and the first pivot hole b363 and the second pivot hole b are arranged concentrically, and the second shaft 32 penetrates through the non-circular hole b341 of the second gear 34 and then is pivoted through the first pivot hole b363 and the second pivot hole b; and one end thereof on the outer side is fixed in the first mounting hole b 375 of the first side plate b383 by a fastener 7 (screw); and one end of the inner side of the first mounting hole is inserted into the second mounting hole b 376; (not shown, the fitting relationship can be seen in fig. 6), it can be understood that the first mounting hole b near the outer side is a fastening hole, such as a screw hole, and the second mounting hole b near the inner side is a non-circular hole, so as to be in limit fit with the square first shaft 32, and prevent the second shaft from being removed from the front connecting base.

The first intermediate shaft 8 and the second intermediate shaft 9 are both circular shafts fixedly mounted inside the gear box 36, the first intermediate gear 351 and the second intermediate gear 352 are provided with a first pivot hole 353 and a second pivot hole 354 penetrating through the first intermediate gear and the second intermediate gear, the first intermediate shaft 8 is pivoted through the first pivot hole 353, and the second intermediate shaft 9 is pivoted through the second pivot hole 354.

As shown in fig. 3, the first intermediate shaft 8 and the second intermediate shaft 9 are circular shafts; the first shaft 8 and the second shaft 9 extend in parallel with the width extending direction of the front running board 1, and a first intermediate shaft 8 and a second intermediate shaft 9 which are parallel with the first shaft 8 and the second shaft 9 are arranged in the gear box 36.

In addition, the cross section of the gear box provided by the utility model is oval, when the front running table and the rear running table are in working state, the upper surfaces of the front running table, the rear running table and the gear box are in the same horizontal plane, and compared with the hinge mechanism of the prior design, the gear assembly of the utility model has the advantages that no convex part exists on the running table surface, the surface is smooth, the running comfort level is improved, and the post-processing cost is reduced; in addition, the circumferential wall of the gear box and the action surfaces of the front connecting seat and the rear connecting seat form a cambered surface, so that the whole rotating operation process is smoother, and the noise is lower; it may also be round, kidney-shaped, allowing it to be pivotally operated and to accommodate the gear.

The utility model provides a run the platform, can run the platform before with and fold on the platform is folding after, also can run the platform after and fold before on the platform, the front side based on running the platform before generally need be provided with controlling means, consequently general technical personnel in the field can select to run the platform setting after and run the bench in the front, fig. 9 shows the utility model provides a run the process of folding up of platform:

first, front running table and back running table folding process schematic diagram 1

As shown in the left drawing of fig. 9a, when the running platform needs to be folded, the external force which is upwards lifted is given to the rear running platform 2 according to the direction shown in the drawing, the positioning boss is removed from the positioning step, when the rear running platform is lifted, because the second gear connected with the rear running platform is of an integrated structure, the angular velocity generated when the rear running platform is lifted by the second gear through two intermediate gears is transmitted, the front running platform does not displace, the rear running platform and the front running platform form a reaction force, meanwhile, the rear running platform can drive the gear box to be upwards lifted, and the upwards lifting action of the gear box can be synchronously carried out with the folding of the rear running platform under the action of the gears.

Second, schematic diagram of folding process of front running table and rear running table 1

In the folding process, the included angle between the rear running table and the front running table is gradually reduced, and the included angle between the gear box and the running table under the driving of the rear running table is gradually reduced.

Thirdly, the folding state schematic diagram of the front running table and the rear running table;

the back is run the platform and is overlapped to the preceding platform top of running, and at this moment, the back is run the platform and is run the platform contained angle before and be 0, and the gear box is 90 with the contained angle of running the platform.

The utility model provides a treadmill is applied to in the treadmill, the treadmill that the type optional for example CN207769063U disclosed.

The above description of the present invention is intended to be illustrative. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims (10)

1. A pivot mechanism for a foldable treadmill, comprising: the pivoting mechanism comprises a gear box, a first gear and a second gear which are fixedly arranged in the gear box, and a first intermediate gear and a second intermediate gear which are rotatably arranged in the gear box, wherein the first gear, the first intermediate gear, the second intermediate gear and the second gear are meshed in sequence; two sides of the gear box are respectively pivoted to the rear end of the front running platform and the front end of the rear running platform; the first gear is fixedly connected to the front running platform, and the second gear is fixedly connected to the rear running platform.

2. The folding treadmill pivot mechanism of claim 1, wherein: the pivoting mechanism further comprises a first shaft, a first intermediate shaft, a second intermediate shaft and a second shaft;

the first pivot penetrates through the gear box and then is fixedly connected with the rear end of the front running table, and the first gear is fixedly arranged on the first shaft;

the second shaft pivot penetrates through the gear box and then is fixedly connected with the front end of the rear running platform, and the second gear is fixedly arranged on the second shaft;

the first intermediate shaft is fixed in the gear box, and the first intermediate gear is pivoted on the first intermediate shaft;

the second intermediate shaft is fixed inside the gear box, and the second intermediate gear is pivoted on the second intermediate shaft.

3. The folding treadmill pivot mechanism of claim 1, wherein: the cross section of the gear box is oval or circular, and the upper surface of the gear box does not protrude out of the horizontal planes of the front running table and the rear running table.

4. The folding treadmill pivot mechanism of claim 2, wherein:

the first shaft and the second shaft are non-circular shafts;

the first gear is provided with a non-circular hole a penetrating through the first gear, two side walls of the gear box are provided with a first pivot hole a and a second pivot hole a which are concentric with the non-circular hole, and the first shaft is matched with the non-circular hole a and is pivoted through the first pivot hole a and the second pivot hole a;

the second gear has a non-circular hole b penetrating through it, the two side walls of the gear box are provided with a first pivot hole b and a second pivot hole b which are concentric with the non-circular hole, and the second shaft is adapted to the non-circular hole b and is pivoted through the first pivot hole b and the second pivot hole b.

5. The folding treadmill pivot mechanism of claim 1, wherein: the gear box comprises a gear box body, a first gear and a second gear, wherein the gear box body is provided with a gear box body, the gear box body is provided with a first circumferential baffle wall and a second circumferential baffle wall, the first gear is arranged on the gear box body, the second gear is.

6. The folding treadmill pivot mechanism of claim 1, wherein: the first intermediate shaft and the second intermediate shaft are round shafts fixedly mounted in the gears, the first intermediate gear and the second intermediate gear are provided with a first pivot hole and a second pivot hole which penetrate through the first intermediate gear and the second intermediate gear, the first intermediate shaft is pivoted through the first pivot hole, and the second intermediate shaft is pivoted through the second pivot hole.

7. The folding treadmill pivot mechanism of claim 6, wherein: and two ends of the first intermediate gear and the second intermediate gear are abutted against the inside of the gear box.

8. The folding treadmill pivot mechanism of claim 7, wherein: the two ends of the first intermediate gear and the second intermediate gear are abutted against the bulges formed in the gear box.

9. The folding treadmill pivot mechanism of claim 1, wherein: the gear case has a circumferential wall and two side walls, wherein the first side wall and/or the second side wall is detachably coupled to both sides of the circumferential wall.

10. A treadmill comprising a front running board and a rear running board and at least one pivoting mechanism as claimed in claims 1 to 9, wherein either one of the front running board and the rear running board is foldable over the other by at least one of the pivoting mechanisms.

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