CN216045261U

CN216045261U - Treadmill with belt tightness automatic compensation function

Info

Publication number: CN216045261U
Application number: CN202121295402.0U
Authority: CN
Inventors: 方恬
Original assignee: Zhejiang Lijiujia Sports Equipment Co ltd
Current assignee: Zhejiang Lijiujia Sports Equipment Co ltd
Priority date: 2021-06-10
Filing date: 2021-06-10
Publication date: 2022-03-15
Anticipated expiration: 2031-06-10

Abstract

The utility model relates to the technical field of running machines, and discloses a running machine with automatic belt tightness compensation, which comprises a bottom frame, a motor and a driving shaft which are arranged in the bottom frame in parallel, and a belt with two ends respectively sleeved on an output shaft of the motor and the driving shaft, wherein an automatic belt tensioning mechanism is arranged between the motor and the bottom frame, the automatic belt tensioning mechanism comprises a mounting block fixedly arranged on the bottom frame, and a hanging piece which is arranged on the outer ring wall of the motor in a protruding mode and is hinged with the mounting block, and the running machine with automatic belt tightness compensation can enable the belt to automatically keep a tensioning state and prolong the service life of the belt.

Description

Treadmill with belt tightness automatic compensation function

Technical Field

The utility model relates to the technical field of treadmills, in particular to a treadmill with automatic belt tightness compensation.

Background

The treadmill is as indoor body-building motion's platform, not influenced by weather, more needn't interrupt the body-building plan, can reach the scientific exercise purpose, the transmission of common treadmill when the assembly, need make the belt be in the tensioning state through the mode of artifical adjustment motor relative position, nevertheless the belt can take place to relax the phenomenon of skidding after using a period of time, need again through artifical mode adjustment motor relative position again, make the belt continue to be in the tensioning state, the maintenance cost is high and the operation is inconvenient, consequently, the treadmill that is provided with the automatic overspeed device tensioner of belt has appeared.

Chinese patent with application number CN201920188873.8 discloses an automatic belt tensioning device for use on treadmill secondary speed reducer, including swing arm, extension spring and take-up pulley, the middle part of swing arm rotates with secondary speed reducer's fixed bolster to be connected, and the lower extreme of extension spring is connected with an end of swing arm, and the upper end and the fixed bolster of extension spring are connected, and the take-up pulley rotates to be installed at another tip of swing arm, and the take-up pulley pushes down secondary speed reducer's second belt middle part upper surface downwards. The automatic belt tensioning device adopts a lever principle, and the tension spring enables the tension wheel to downwards press the second belt of the secondary speed reducing device, so that the second belt is kept in a tight state.

This automatic tensioning device has adopted lever principle, makes the take-up pulley push down second belt of second grade decelerator downwards through the extension spring, and then makes the second belt keep tight state, but the extension spring makes the take-up pulley push down the belt all the time, and the belt is more new the tight degree is higher, and the tensile deformation that produces of extension spring is big more, and the elasticity of production is big more, and the take-up pulley is big more downwards to apply the power on the belt, thereby make the speed that belt deformation is lax accelerate, shorten the belt life-span.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a treadmill with automatic belt tightness compensation, which can automatically keep a belt in a tensioning state and prolong the service life of the belt.

In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a treadmill of belt elasticity automatic compensation, includes the underframe, locates the output shaft of motor and the epaxial belt of driving respectively cover at underframe inner parallel arrangement's motor and driving shaft and both ends, is provided with the automatic straining device of belt between motor and the underframe, and the automatic straining device of belt includes the installation piece of fixed setting on the underframe and outwards protruding the establishing on the outer rampart of motor and the articulated lacing film of installation piece.

By adopting the scheme, compared with the prior art that the belt is pressed downwards by the tensioning wheel, the tensioning degree of the belt is higher when the belt is new, the deformation generated by the tension of the tension spring is larger, the generated elastic force is larger, the force exerted downwards by the tensioning wheel on the belt is larger, the speed of the deformation relaxation of the belt is accelerated, and the service life of the belt is shortened, in the scheme, the motor is hinged on the bottom frame, the tensioned belt is arranged between the motor and the driving shaft, the motor is driven by the tensioned belt to upwards turn over a certain angle and keep the state, the tension on the motor is reduced along with the gradual aging relaxation of the belt, the motor turns downwards under the action of gravity, the distance between the output shaft of the motor and the driving shaft is increased, the belt is tensioned again, the motor turns downwards to be static after the tension is balanced with the gravity, so that the automatic tensioning of the belt is realized, the operation is simple, the regular maintenance is not needed, and the labor cost is reduced, and no additional pressure is exerted on the belt, so that the service life of the belt is prolonged.

Furthermore, be provided with hinge structure between installation piece and the lacing film, hinge structure includes the spacing axle that sets up and the output shaft axial direction parallel of motor that outwards the epirelief is established on the installation piece and set up on the lacing film with spacing axle interlude normal running fit's round hole.

By adopting the scheme, the hanging pieces and the limiting shaft are inserted and matched in a rotating manner to realize that the motor turns over up and down around the axis of the limiting shaft.

Furthermore, be provided with the fast-assembling structure that makes the motor install fast on the underframe between spacing axle and the lacing film, the fast-assembling structure is waist circle form setting's fixed axle and the groove of stepping down that only supplies the fixed axle to keep away from the one end of installation piece to insert the round hole that the lacing film bottom was concave to establish including fixed cover locating spacing epaxial and keep away from the one end cross-section of installation piece, and the width in the groove of stepping down equals with the interval between two planes on the outer anchor axle external ring face.

Adopt above-mentioned scheme, during the motor installation, only need insert the round hole through the groove of stepping down with the fixed axle, can make the motor install on the underframe, because the one end cross-section that the installation piece was kept away from to the fixed axle is waist circle form, make the interval between two cambered surfaces on the outer anchor shaft anchor ring be greater than the interval between two planes, only when two lateral walls in the groove of stepping down respectively with two plane butts on the outer anchor shaft anchor ring, the fixed axle just can insert the round hole or break away from with the round hole, promoted the stability of motor installation when guaranteeing the quick installation of motor.

Further, be provided with the anti-disengaging structure who prevents lacing film and fixed axle and break away from between motor and the base, anti-disengaging structure includes the protruding first limiting plate of establishing of direction that is close to the installation piece on the motor, keep away from the second limiting plate that the vertical downward fixation of one end set up of motor in first limiting plate, the through-hole of seting up on the second limiting plate, set up on the underframe with the through-hole just right anti-disengaging hole and pass behind the through-hole with anti-disengaging hole complex bolt, there is the clearance that supplies the bolt to overturn certain angle from top to bottom around the fixed axle centre of a circle between the roof in bolt outer anchor annular face and anti-disengaging hole and the diapire.

Adopt above-mentioned scheme, set up the stability that anti-disengaging structure further promoted the motor installation, the bolt passes behind the through-hole and cooperates with the anticreep hole, further with the motor spacing on the underframe, because the motor articulates and sets up on the underframe, the bolt overturns thereupon during the motor upset, has the clearance to supply the bolt to overturn from top to bottom between anticreep hole and the bolt.

Further, the range of the angle of the bolt turning upwards or downwards is 0-10 degrees.

By adopting the scheme, the angle of the bolt turnover controls the angle of the motor to turn over up and down, and the phenomenon that the motor is separated from the fixed shaft due to the overlarge turnover angle is avoided.

Furthermore, a fixing structure is arranged between the through hole and the bolt, and the fixing structure comprises an internal thread arranged on the inner wall of the through hole and an external thread which is arranged on the outer annular wall of the bolt and is in threaded fit with the internal thread.

Adopt above-mentioned scheme, along with motor long-term operation or upset, the bolt slides and breaks away from and make anti-disengaging structure inefficacy with the anticreep hole, and the bolt is fixed in and to guarantee in the through-hole that the bolt alternates the cooperation with the anticreep hole all the time.

Furthermore, the anti-dropping holes are arranged in a vertical waist circle shape, an oval shape or a rectangular shape.

By adopting the scheme, the anti-falling holes in the vertical waist circle shape or the oval shape or the rectangular shape can provide gaps for the bolts to overturn up and down, and the horizontal sliding of the motor can be avoided.

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

1. the motor is hinged to the bottom frame, the motor is driven by the tensioned belt to upwards overturn for a certain angle and keep the state, the tension on the motor is reduced along with gradual aging and loosening of the belt, the motor downwards overturns under the action of gravity, the distance between an output shaft of the motor and a driving shaft is increased, the belt is tensioned again, the motor downwards overturns until the tension is balanced with the gravity and then stands still, and therefore automatic tensioning of the belt is achieved, the belt tensioning device is simple to operate, does not need regular maintenance, labor cost is reduced, pressure applied to the belt additionally does not exist, and the service life of the belt is prolonged.

2. Set up fast-assembling structure and make the motor quick installation on the underframe, easy operation and lifting efficiency.

3. Set up the angle of anti-disengaging structure control motor upset from top to bottom, avoid motor rotation angle too big and break away from the fixed axle, further promote the stability of motor installation, through 3 above-mentioned advantages, prolong the life of belt when making the automatic tensioning state that keeps of belt.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:

FIG. 1 is an isometric view of a treadmill with automatic belt take-up compensation as in embodiment 1;

FIG. 2 is a front view of the structure shown at A in FIG. 1 with the belt slack;

FIG. 3 is a front view of the arrangement shown at A after the belt of FIG. 1 is slackened;

FIG. 4 is a front view of the structure shown at A after the belt slackens in embodiment 2;

FIG. 5 is a bottom view of the structure shown at A after the belt slackens in example 2;

fig. 6 is a partial sectional view at B-B in fig. 5.

In the figure: 1. a bottom frame; 2. a motor; 3. a drive shaft; 4. a belt; 5. mounting blocks; 6. hanging a piece; 7. a limiting shaft; 8. a circular hole; 9. a fixed shaft; 10. a yielding groove; 11. a first limit plate; 12. a second limiting plate; 13. a through hole; 14. anti-drop holes; 15. and (4) a bolt.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Example 1

A treadmill with automatic belt tightness compensation is disclosed, referring to fig. 1 to 3, comprising a bottom frame 1, a motor 2 and a driving shaft 3 which are arranged in parallel in the bottom frame 1, and a belt 4 with two ends respectively sleeved on an output shaft of the motor 2 and the driving shaft 3, an automatic belt tensioning mechanism is arranged between the motor 2 and the bottom frame 1, the automatic belt tensioning mechanism comprises a mounting block 5 which is fixedly arranged on the bottom frame 1, a hanging piece 6 which is arranged on the outer ring wall of the motor 2 and is hinged with the mounting block 5 in an outward protruding way, the mounting block 5 is connected with the hanging piece 6 through a hinged structure, the hinged structure comprises a limiting shaft 7 which is arranged on the mounting block 5 in an outward protruding way and is parallel to the axial direction of the output shaft of the motor 2, and a round hole 8 which is arranged on the hanging piece 6 and is in inserting and rotating fit with the limiting shaft 7, in the embodiment, the mounting block 5 is arranged on the bottom frame 1 in parallel and is provided with 2 blocks, the limiting shaft 7 is inserted and matched with two mounting blocks 5, the hanging piece 6 is arranged on the motor 2 in parallel and is just opposite to the outer side provided with 2 and respectively located two mounting blocks 5, a mounting plate convenient for mounting the mounting blocks 5 is arranged on the bottom frame 1, a fast-assembling structure enabling the motor 2 to be rapidly mounted on the bottom frame 1 is arranged between the limiting shaft 7 and the hanging piece 6, the fast-assembling structure comprises a fixing shaft 9 fixedly sleeved on the limiting shaft 7 and far away from the mounting blocks 5, and a abdicating groove 10 which is concavely arranged at the bottom of the hanging piece 6 and only allows one end, far away from the mounting blocks 5, of the fixing shaft 9 to be inserted into the round hole 8, the width of the abdicating groove 10 is equal to the distance between two planes on the outer ring surface of the fixing shaft 9, the waistline is a closed graph formed by dividing a circle into two semicircular arcs through the center of the circle and mutually reversely translating, and connecting the end points of the two semicircular arcs through two equilong parallel lines.

The installation of the motor 2 can be completed by rotating the motor 2 to enable two side walls of the abdicating groove 10 to be respectively parallel and opposite to two planes on the outer annular surface of the fixed shaft 9, the fixed shaft 9 is inserted into the round hole 8 through the abdicating groove 10, the fixed shaft 9 is limited in the round hole 8 by rotating the motor 2, the motor 2 is hinged on the bottom frame 1, after one end of the belt 4 is sleeved on the driving shaft 3, the motor 2 is overturned upwards to enable the other end of the belt 4 to be sleeved on an output shaft of the motor 2, the motor 2 is loosened, the motor 2 is overturned downwards under the action of gravity, the belt 4 is gradually tensioned, the tension force from the belt 4 on the motor 2 is gradually increased, the motor 2 is static at the position after the tension force is balanced with the gravity, the belt 4 is in a tensioned state, the belt 4 is gradually aged and loosened along with the increase of the service time of the treadmill, the tension on the motor 2 is reduced, and the motor 2 is overturned downwards again under the action of the gravity, the distance between the output shaft of the motor 2 and the driving shaft 3 is increased, so that the belt 4 is in a tensioning state again, and the motor 2 is static again after the tension and the gravity are balanced, so that the belt 4 is automatically tensioned.

Example 2

In this embodiment, compared with embodiment 1, the difference is that, referring to fig. 4 to 6, an anti-disengaging structure for preventing the hanging piece 6 from being disengaged from the fixing shaft 9 is disposed between the motor 2 and the base, the anti-disengaging structure includes a first limiting plate 11 protruding from the motor 2 in a direction approaching the mounting block 5, a second limiting plate 12 fixed vertically and downwardly at an end of the first limiting plate 11 away from the motor 2, a through hole 13 formed in the second limiting plate 12, an anti-disengaging hole 14 formed in the bottom frame 1 and facing the through hole 13, and a plug pin 15 passing through the through hole 13 and then matching with the anti-disengaging hole 14, an avoiding hole for the plug pin 15 to pass through is disposed on the mounting plate, a gap for the plug pin 15 to turn over a certain angle up and down around the center of the fixing shaft 9 exists between an outer annular surface of the plug pin 15 and a top wall and a bottom wall of the anti-disengaging hole 14, the plug pin 15 turns over up or down in an angle range of 0 to 10 degrees, be provided with fixed knot between through-hole 13 and bolt 15 and construct, fixed knot construct including the internal thread that sets up on through-hole 13 inner wall and set up on the outer rampart of bolt 15 with internal thread screw-thread fit's external screw thread, the external screw thread sets up in the one end that bolt 15 is close to motor 2 in this embodiment, anticreep hole 14 is vertical waist circle form or ellipse circular or rectangle form setting.

Bolt 15 is fixed in on second limiting plate 12 through screw-thread fit, and its one end that passes through-hole 13 cooperates with anticreep hole 14, further spacing motor 2 on underframe 1, because motor 2 articulates and sets up on underframe 1, bolt 15 upset along with it during the motor 2 upset, there is clearance between anticreep hole 14 and the bolt 15 and supplies the bolt 15 to overturn from top to bottom, when 15 outer anchor ring of bolt and 14 roof of anticreep hole or diapire butt, motor 2 can't upwards or overturn downwards again, can avoid motor 2 to break away from on fixed axle 9 because of the upset angle is too big, further promote the stability of motor 2 installation.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the utility model. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a treadmill of belt elasticity automatic compensation, includes underframe (1), motor (2) and driving shaft (3) and both ends that parallel arrangement in underframe (1) overlap respectively and locate belt (4) on output shaft and driving shaft (3) of motor (2), its characterized in that: be provided with the automatic straining device of belt between motor (2) and underframe (1), the automatic straining device of belt includes installation piece (5) of fixed setting on underframe (1) and outside protruding hanger piece (6) of establishing articulated with installation piece (5) on the outer rampart of motor (2).

2. The treadmill of claim 1, wherein the treadmill comprises: a hinge structure is arranged between the mounting block (5) and the hanging piece (6), and the hinge structure comprises a limiting shaft (7) which is arranged on the mounting block (5) in a protruding mode and is parallel to the axial direction of the output shaft of the motor (2) and a round hole (8) which is arranged on the hanging piece (6) and is inserted into the limiting shaft (7) in a rotating fit mode.

3. The treadmill of claim 2, wherein the treadmill is capable of automatically compensating for belt tightness, further comprising: be provided with between spacing axle (7) and lacing film (6) and make motor (2) install the fast-assembling structure on underframe (1) fast, the fast-assembling structure is fixed axle (9) that waist circle form set up and only supplies that the one end cross-section of installation piece (5) was kept away from on fixed cover locating spacing axle (7) and in lacing film (6) bottom concave establishment only supply that fixed axle (9) keep away from one end of installation piece (5) to insert groove (10) of stepping down of round hole (8), the width in groove (10) of stepping down equals with the interval between two planes on the outer anchor axle (9) external ring face.

4. The treadmill of claim 1, wherein the treadmill comprises: be provided with the anti-disengaging structure who prevents lacing film (6) and fixed axle (9) and break away from between motor (2) and the base, anti-disengaging structure includes first limiting plate (11) of protruding the establishing of direction that is close to installation piece (5) on motor (2), keep away from second limiting plate (12) of the vertical downward fixed setting of one end of motor (2) in first limiting plate (11), through-hole (13) of seting up on second limiting plate (12), set up on underframe (1) with through-hole (13) just right anti-disengaging hole (14) and pass behind through-hole (13) with anti-disengaging hole (14) complex bolt (15), there is the clearance that supplies bolt (15) to overturn certain angle from top to bottom around fixed axle (9) centre of a circle between the roof and the diapire of bolt (15) outer anchor ring face and anti-disengaging hole (14).

5. The treadmill of claim 4, wherein the treadmill comprises: the angle range of the bolt (15) turning upwards or downwards is 0-10 degrees.

6. The treadmill of claim 4, wherein the treadmill comprises: a fixing structure is arranged between the through hole (13) and the bolt (15), and the fixing structure comprises an internal thread arranged on the inner wall of the through hole (13) and an external thread which is arranged on the outer annular wall of the bolt (15) and is in threaded fit with the internal thread.

7. The treadmill of claim 4, wherein the treadmill comprises: the anti-drop holes (14) are arranged in a vertical waist circle shape, an oval shape or a rectangular shape.