CN211461931U - Transmission mechanism - Google Patents

Abstract

The application discloses drive mechanism, wherein, drive mechanism includes: the front roller comprises a front roller and a front synchronizing rod, and the front roller is arranged at the two ends of the front synchronizing rod; the rear roller comprises a rear roller and a rear synchronizing rod, and the two ends of the rear synchronizing rod are provided with the rear roller; the conveying belt is arranged on the front roller and the rear roller which are positioned on the same side, and the conveying belt is in belt transmission connection with the front roller and the rear roller; wherein, be provided with a plurality of bellyings on the working face of back gyro wheel, a plurality of bellyings set up along the circumference interval of back gyro wheel, and the medial surface of conveyer belt is provided with the draw-in groove with bellyings looks adaptation. The transmission mechanism of this application embodiment is owing to set up a plurality of bellyings on the gyro wheel of back, can guarantee that the conveyer belt of both sides can rotate along with two back gyro wheels synchronization to improve the stability of two conveyer belt operation in-process, and be favorable to reducing the noise of operation in-process.

Description

Transmission mechanism

Technical Field

The application relates to the field of mechanical equipment, in particular to a transmission mechanism.

Background

The treadmill is a body-building apparatus which is always provided for families and gymnasiums, is the simplest one of the current family body-building apparatuses, and is the best choice of the family body-building apparatus. The treadmill consists of a running platform and handrails, the running platform is used for supporting a user to run or walk on the running platform, and various electronic components are arranged on the handrails and used for controlling the treadmill and providing interactive functions. In the related art, the treadmill generally adopts a belt transmission structure to drive the running belt to run, but the running belt is driven by two conveyor belts to run synchronously, so that the running belt has poor stability in the running process and generates large noise.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a transmission mechanism to solve one or more technical problems in the prior art.

In a first aspect, an embodiment of the present application provides a transmission mechanism, including: the front roller comprises a front roller and a front synchronizing rod, and the front roller is arranged at the two ends of the front synchronizing rod; the rear roller comprises a rear roller and a rear synchronizing rod, and the two ends of the rear synchronizing rod are provided with the rear roller; the conveying belt is arranged on the front roller and the rear roller which are positioned on the same side, and the conveying belt is in belt transmission connection with the front roller and the rear roller; wherein, be provided with a plurality of bellyings on the working face of back gyro wheel, a plurality of bellyings set up along the circumference interval of back gyro wheel, and the medial surface of conveyer belt is provided with the draw-in groove with bellyings looks adaptation.

In one embodiment, the plurality of synchronizing teeth are saw-toothed in projection shape on an axial cross section of the rear drum.

In one embodiment, each projection is provided with a plurality of synchronizing teeth, and the locking grooves on the inner side of the conveyor belt cooperate with the synchronizing teeth.

In one embodiment, the two conveyor belts are respectively sleeved on the front roller and the rear roller on two sides, and a crawler belt is installed between the two conveyor belts.

In one embodiment, the track is formed by splicing a plurality of track bars, each track bar being secured between two conveyor belts.

In one embodiment, the track is made of a metal material and the outer surface of the track is covered with a rubber material.

In one embodiment, the outer edge of the end face of one side of the rear roller far away from the conveyor belt is provided with a rear check ring.

In one embodiment, the outer edge of the end face of the front roller far away from the conveyor belt is provided with a front retainer ring.

In one embodiment, the working surface of the front roller is provided with a polyurethane layer.

In a second aspect, an embodiment of the present application provides a treadmill, including: running a platform; according to the transmission mechanism of the embodiment of the application, the transmission mechanism is installed on a running platform.

In one embodiment, the treadmill further comprises: the driving device is arranged on the running table, and the output end of the driving device is in transmission connection with the rear synchronizing rod.

One embodiment in the above application has the following advantages or benefits: through set up a plurality of bellyings on the gyro wheel of back, can guarantee that the conveyer belt of both sides can follow two back gyro wheels synchronous rotations to improve the stability of two conveyer belt operation in-process, and be favorable to reducing the noise of operation in-process.

The foregoing summary is provided for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present application will be readily apparent by reference to the drawings and following detailed description.

Drawings

In the drawings, like reference numerals refer to the same or similar parts or elements throughout the several views unless otherwise specified. The figures are not necessarily to scale. It is appreciated that these drawings depict only some embodiments in accordance with the disclosure and are therefore not to be considered limiting of its scope.

FIG. 1 illustrates a schematic structural diagram of a transmission mechanism according to an embodiment of the present application;

FIG. 2 illustrates a schematic diagram of a rear roller of a transmission according to an embodiment of the present application;

FIG. 3 illustrates a schematic diagram of a front roller of a transmission according to an embodiment of the present application;

FIG. 4 illustrates a schematic structural diagram of a transmission mechanism according to an embodiment of the present application;

FIG. 5 shows an enlarged partial schematic view at A in FIG. 4;

FIG. 6 shows a partial enlarged schematic view at B in FIG. 4;

fig. 7 shows a schematic structural view of a treadmill according to an embodiment of the present application.

The reference numbers illustrate:

a treadmill 1000;

a transmission mechanism 100;

a front drum 10; a front guide lever 11; a front roller 12; a front bushing 121; a key groove 121 a; a front hub 122; a front retainer ring 123;

a rear drum 20; a rear synchronization lever 21; a rear roller 22; the boss 22 a; the synchronizing teeth 22 b; a rear bushing 221; a rear hub 222; an inner ring portion 2221; an outer ring portion 2222; positioning grooves 2222 a; spokes 2223; a positioning portion 2223 a; a rear retainer ring 23;

a conveyor belt 30; a card slot 31;

a crawler belt 40; a track 41;

a treadmill 200;

a drive means 300.

Detailed Description

The following description of the exemplary embodiments of the present application, taken in conjunction with the accompanying drawings, includes various details of the embodiments of the application for the understanding of the same, which are to be considered exemplary only. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the present application. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.

A transmission mechanism 100 according to an embodiment of the present application is described below with reference to fig. 1 to 6. The transmission mechanism 100 of the embodiment of the present application can be applied to the treadmill 1000.

As shown in fig. 1, a driving mechanism 100 according to an embodiment of the present application includes a front roller 10, a rear roller 20, and a conveyor belt 30.

Specifically, the front roller 10 includes a front roller 12 and a front guide lever 11, the front guide lever 11 is provided at both ends thereof with the front rollers 12, and the front guide lever 11 is used to keep the two front rollers 12 rotating synchronously. The rear roller 20 includes a rear roller 22 and a rear synchronization rod 21, the rear roller 22 is disposed at two ends of the rear synchronization rod 21, and the rear roller 22 is used for keeping the two rear synchronization rods 21 rotating synchronously. The conveyor belt 30 is disposed on the front roller 12 and the rear roller 22 on the same side, and the conveyor belt 30 is in belt-driving connection with the front roller 12 and the rear roller 22.

In one example, as shown in fig. 1 and 2, the front drum 10 is disposed opposite to the rear drum 20 in the front-rear direction. Two front rollers 12 are coupled to left and right ends of the front synchronizing bar 11, and two rear rollers 22 are positioned at left and right ends of the rear synchronizing bar 21. The front roller 12 on the left side is disposed opposite to the rear roller 22 on the left side, and the front roller 12 on the right side is disposed opposite to the rear roller 22 on the right side. The number of the conveyor belts 30 is two, one of the conveyor belts 30 is sleeved on the front roller 12 and the rear roller 22 on the left side, and the other conveyor belt 30 is sleeved on the front roller 12 and the rear roller 22 on the right side. A track 40 may be connected between the two belts 30, and the track 40 is driven synchronously with the two belts 30.

Furthermore, a plurality of protrusions 22a are disposed on the working surface of the rear roller 22, the protrusions 22a of the two rear rollers 22 are disposed opposite to each other, the protrusions 22a are disposed at intervals along the circumferential direction of the rear roller 22, and the inner side surface of the conveyor belt 30 is provided with a locking groove 31 adapted to the synchronizing tooth 22 b. For example, the plurality of protrusions 22a of the two rear rollers 22 may be configured to be arranged in one-to-one correspondence in the left-right direction, whereby the parallelism of a pair of protrusions 22a of the two rear rollers 22 in the left-right direction can be ensured, thereby ensuring the synchronous transmission of the conveyor belts 30 on both sides. It can be understood that the plurality of protrusions 22a are spaced apart from each other in the circumferential direction of the rear roller 22, and the engagement between the engaging grooves 31 and the protrusions 22a enables the conveyor belt 30 and the rear roller 22 to form the chain transmission mechanism 100, thereby improving the transmission ratio between the rear roller 22 and the conveyor belt 30.

In one example, the rear synchronization rod 21 may be connected to an output end of the driving device 300, such that the rear synchronization rod 21 rotates around a central axis thereof and drives the two rear rollers 22 to rotate synchronously, and the two front rollers 12 rotate synchronously with the rear rollers 22 via the two conveyor belts 30.

According to the transmission mechanism 100 of the embodiment of the application, the plurality of protruding portions 22a are arranged on the rear roller 22, and the conveyor belt 30 is provided with the clamping grooves 31 matched with the plurality of protruding portions 22a, so that the conveyor belts 30 on two sides can synchronously rotate along with the two rear rollers 22, the relative displacement between the two conveyor belts 30 is avoided, and the synchronous operation of the two conveyor belts 30 is ensured. Thereby, it is possible to ensure that the caterpillar 40 connected between the two conveyors 30 is smoothly operated and noise during operation is small.

In one embodiment, as shown in fig. 2 and 5, the projection shape of the boss 22a in the cross section in the axial direction of the rear drum 20 is a sector ring shape. Here, the cross section of the projection 22a in the axial direction of the rear drum 20 may be understood as a projection of the projection 22a on a plane perpendicular to the central axis of the rear drum 20, and the projection shape of the projection 22a is a sector ring shape.

In one embodiment, as shown with continued reference to fig. 2 and 5, each of the projections 22a is provided with a plurality of synchronizing teeth 22b, and the pockets 31 on the inner side of the conveyor belt 30 engage the synchronizing teeth 22 b.

In one example, the projected shape of the plurality of synchronizing teeth 22b in the cross section in the axial direction of the rear drum 20 is a zigzag shape. Specifically, the plurality of synchronizing teeth 22b on the projecting portion 22a may be arranged at intervals in a plurality of groups along the circumferential direction of the rear roller 22, and the projected shape of the plurality of synchronizing teeth 22b in each group in the cross section in the circumferential direction of the rear drum 20 is a zigzag shape. Therefore, the number of the protruding portions 22a can be reduced while the transmission connection between the rear roller 22 and the conveyor belt 30 is ensured, so that the processing difficulty of the plurality of protruding portions 22a is reduced, and the processing efficiency of the rear roller 22 is improved.

In one embodiment, as shown in fig. 4, two conveyor belts 30 are provided and are respectively sleeved on the front roller 12 and the rear roller 22 at two sides, and a track 40 is connected between the two conveyor belts 30. For example, the track 40 may be configured as a closed loop structure with the inner surface of the track 40 fixedly attached to the outer surfaces of the two belts 30, such that the two belts 30 move the track 40. Among other things, the track 40 may be used for a running belt of the treadmill 1000 to perform a running function of the treadmill 1000.

In one embodiment, the track 40 is formed by splicing a plurality of track bars 41, each track bar 41 being connected between two conveyor belts 30.

In one example, as shown in fig. 4-6, a plurality of tracks 41 are arranged in sequence along the circumference of the conveyor belt 30 to splice the tracks 40 forming a closed loop structure. The two conveyor belts 30 are respectively provided with mounting holes corresponding to each other in position in the left-right direction, and the mounting holes in each conveyor belt 30 are arranged at intervals in the longitudinal direction of the conveyor belt 30. Each track 41 is provided with two positioning columns, and the two positioning columns respectively penetrate through the mounting holes corresponding to the positions on the two conveyor belts 30. This ensures the parallelism of the plurality of track bars 41 between the two conveyors 30, and further improves the stability of the operation of the crawler 40.

Preferably, a resilient member is provided between the belt 30 and the track 40, and the positioning posts on the track 40 pass through the resilient member and fit into the mounting holes on the belt 30. This prevents the crawler belt 40 from directly contacting the conveyor belt 30, and thus, the crawler belt plays a role of shock absorption and buffering.

In one embodiment, the track 40 is formed from a combination of aluminum alloy and synthetic rubber. For example, each track 41 may be formed by wrapping an outer surface of an aluminum alloy with a synthetic rubber member, so that the outer surface of the track 41 has certain elasticity while the rigidity of the track 41 is ensured, and when a user runs on the track 40, the track 40 provides a certain vibration damping and buffering effect for the user, thereby improving the user experience.

In one embodiment, as shown in fig. 2, the rear roller 22 includes a rear bushing 221 and a rear hub 222, the rear hub 222 is sleeved on the rear bushing 221, and the rear bushing 221 is provided with a key slot 121a adapted to the rear synchronization rod 21. The plurality of protrusions 22a are provided on the outer peripheral surface of the rear hub 222. The rear bushing 221 is keyed to the synchronizing bar by a detent key installed in the key groove 121a to achieve torque transmission. Preferably, the rear hub 222 is disposed concentrically with the rear bushing 221.

Alternatively, the rear bushing 221 is a 45 steel product and the rear hub 222 is a reinforced nylon product. It can be appreciated that the steel grade 45 has higher strength and deformation resistance than the conventional a3 steel, and thus, the mechanical properties of the rear bushing 221 can be improved to extend the lifespan of the rear bushing 221. The reinforced nylon may be a mixed material of nylon and glass fiber, so that the rear hub 222 has a better mechanical property, so that the rear hub 222 is not easily deformed.

Alternatively, as shown in fig. 2, the rear hub 222 includes an inner ring portion 2221 and an outer ring portion 2222, the inner ring portion 2221 is sleeved on the rear bushing 221, the outer ring portion 2222 is sleeved on the inner ring portion 2221, the inner ring portion 2221 and the outer ring portion 2222 are connected through a plurality of spokes 2223, the plurality of spokes 2223 are arranged at intervals in the circumferential direction of the outer ring portion 2222, and each spoke 2223 extends from the inner ring portion 2221 to the outer ring portion 2222 in the radial direction of the outer ring portion 2222. The inner ring portion 2221 and the rear bushing 221 are in interference fit, and the plurality of spokes 2223 and the inner ring portion 2221 may be an integral piece.

Further, the inner peripheral wall of the outer ring portion 2222 is provided with a plurality of positioning grooves 2222a corresponding to the plurality of spokes 2223, and one end of the spokes 2223 away from the inner ring portion 2221 is provided with positioning portions 2223a fitted in the positioning grooves 2222 a. Specifically, the positioning grooves 2222a are circumferentially spaced along the outer ring portion 2222, the positioning portions 2223a are configured at one end of the spoke 2223 adjacent to the outer ring portion 2222, and the positioning portions 2223a are clamped in the positioning grooves 2222a, so that the inner ring portion 2221 drives the outer ring portion 2222 to rotate through the plurality of spokes 2223.

In one embodiment, as shown in fig. 2, a side of the rear roller 22, which is away from the conveyor belt 30 in the axial direction, is provided with a rear retainer ring 23, and the outer diameter of the rear retainer ring 23 is larger than the maximum outer diameter of the rear roller 22. For example, the rear retainer 23 on the rear roller 22 on the left side of the rear synchronizing bar 21 is located on the left side of the rear roller 22, the rear retainer 23 on the rear roller 22 on the right side of the rear synchronizing bar is located on the right side of the rear roller 22, and the outer diameter of the rear retainer 23 is larger than the diameter of the outer edge profile formed by the plurality of protrusions 22a on the rear roller 22. Thereby, the belt 30 can be prevented from being separated from the rear roller 22 from the side of the rear roller 22.

In one embodiment, as shown in fig. 3, a side of the front roller 12, which is far away from the conveyor belt 30 in the axial direction, is provided with a front retainer 123, and the outer diameter of the front retainer 123 is larger than the maximum outer diameter of the front roller 12. For example, the front retainer 123 on the front roller 12 positioned on the left side of the front synchronizing bar 11 is positioned on the left side of the front roller 12, the front retainer 123 on the front roller 12 positioned on the right side of the front synchronizing bar is positioned on the right side of the front roller 12, and the outer diameter of the front retainer 123 is larger than the diameter of the outer edge profile formed by the plurality of protrusions 22a on the front roller 12. Thereby, the belt 30 can be prevented from coming off the front roller 12 from the side of the front roller 12.

In one embodiment, as shown in fig. 3, the front roller 12 includes a front bushing 121 and a front hub 122, the front hub 122 is sleeved on the front bushing 121, and the front bushing 121 is provided with a key slot 121a adapted to the front guide rod 11. The front bushing 121 is keyed to the synchronizing bar by a detent key installed in the key groove 121a to achieve torque transmission. Preferably, the front hub 122 is concentrically disposed with the front bushing 121. The front hub 122 may have the same structure as the rear hub 222, and will not be described herein.

Alternatively, the front hub 121 is a 45-gauge steel product and the front hub 122 is a reinforced nylon product. It can be understood that the steel of grade 45 has higher strength and deformation resistance than the conventional a3 steel, and thus, the mechanical properties of the front bushing 121 can be improved to extend the lifespan of the front bushing 121. The reinforced nylon may be a mixed material of nylon and glass fiber, so that the front hub 122 has better mechanical properties, and the front hub 122 is not easily deformed.

In one embodiment, the outer peripheral wall of the front roller 12 is provided with a PU (polyurethane) layer, i.e., the outer peripheral wall of the front roller 12 is provided with a coating layer made of a polyurethane material. Because the polyurethane material has better vibration reduction and skid resistance, on one hand, the friction force between the front roller 12 and the conveyor belt 30 can be increased, and the sliding between the conveyor belt 30 and the front roller 12 is avoided; on the other hand, vibration and noise generated during the operation of the conveyor belt 30 can be reduced.

In a second aspect, as shown in fig. 7, a treadmill 1000 according to an embodiment of the present application includes a running board 200 and a transmission mechanism 100 according to the above-described embodiment of the present application, wherein the transmission mechanism 100 is mounted to the running board 200.

In one embodiment, the treadmill 1000 further comprises a driving device 300, the driving device 300 is mounted on the treadmill 200, and the output end of the driving device 300 is drivingly connected with the rear synchronization rod 21. Specifically, the output end of the driving device 300 drives the rear synchronization rod 21 to rotate around the central axis thereof so as to drive the two rear rollers 22 to rotate, the two front rollers 12 are in transmission connection with the two rear rollers 22 through the two conveyor belts 30, and the caterpillar 40 operates along with the operation of the two conveyor belts 30.

It should be noted that other components of the treadmill 1000 of the embodiments of the present application may employ various technical solutions that are known to those skilled in the art now and in the future.

According to the technical scheme of this application embodiment, through set up a plurality of bellying 22a on back gyro wheel 22, and be equipped with a plurality of synchronous teeth 22b on the bellying 22a, a plurality of synchronous teeth 22b on two back gyro wheels 22 set up relatively, can guarantee that the conveyer belt 30 of both sides can rotate along with two back gyro wheels 22 are synchronous to guarantee to connect the smooth operation of track 40 between two conveyer belts 30, and be favorable to reducing the noise of operation in-process.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

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 at least one such feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

The above-described embodiments should not be construed as limiting the scope of the present application. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may be made in accordance with design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (9)

1. A transmission mechanism, comprising:

the front roller comprises a front roller and a front synchronizing rod, and the front roller is arranged at two ends of the front synchronizing rod;

the rear roller comprises a rear roller and a rear synchronizing rod, and the rear roller is arranged at two ends of the rear synchronizing rod;

the conveying belt is arranged on the front roller and the rear roller which are positioned on the same side, and the conveying belt is in belt transmission connection with the front roller and the rear roller;

the working surface of the rear roller is provided with a plurality of protruding portions, the protruding portions are arranged at intervals along the circumferential direction of the rear roller, and the inner side face of the conveyor belt is provided with clamping grooves matched with the protruding portions.

2. The transmission mechanism according to claim 1, wherein each of said protrusions is provided with a plurality of synchronizing teeth, said engaging grooves of the inner side of said conveyor belt being engaged with said synchronizing teeth.

3. The transmission mechanism as claimed in claim 2, wherein a projection shape of a plurality of the synchronizing teeth on an axial cross section of the rear drum is a zigzag shape.

4. The transmission mechanism as claimed in claim 1, wherein the two conveyor belts are respectively sleeved on the front roller and the rear roller at two sides, and a track is installed between the two conveyor belts.

5. The transmission mechanism as claimed in claim 4, wherein the track is formed by splicing a plurality of track bars, each track bar being secured between two of the conveyor belts.

6. The transmission mechanism as claimed in claim 5, wherein the track is made of a metal material, and an outer surface of the track is covered with a rubber material.

7. The transmission mechanism according to claim 1, wherein a rear retainer ring is provided on an outer edge of an end surface of the rear roller on a side away from the conveyor belt.

8. The transmission mechanism according to claim 1, wherein a front retainer ring is provided on an outer edge of an end surface of the front roller on a side away from the conveyor belt.

9. The transmission mechanism according to claim 1, wherein a polyurethane layer is provided on the working surface of the front roller.

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