KR100624647B1 - Actuator for tilt adjustment of treadmill and tilt adjustment mechanism of treadmill - Google Patents

Abstract

The present invention relates to an actuator for tilt adjustment of a treadmill and a tilt adjustment mechanism of a treadmill using the same, a drive motor, a pinion that rotates with the power of the drive motor, a belt engaged with the pinion to transmit power of the drive motor, A pair of drive pulleys engaged with the belt and rotating, a screw rod fixing the drive pulley at one end thereof, and a female screw portion engaged with a screw thread of the screw rod, wherein the female screw portion includes a housing coupled with the screw rod. To adjust the inclination of the treadmill, to adjust the inclination of the treadmill can be easily controlled by stretching the two elastic members consisting of a screw rod and the housing by the same length to facilitate the inclination adjustment of the track portion of the treadmill. to provide.

Treadmill, Actuator, Slope, Track, Screw Rod

Description

Actuator for tilt adjustment of treadmill and tilt adjustment mechanism of treadmill using the same {ACTUATOR FOR INCLINATION CONTROLLING OF TREADMILL AND INCLINATION CONTROLLING DEVICE OF TREADMILL USING SAME}

1 and 2 relates to a tilt control mechanism of a conventional treadmill,

1 is a side view showing the configuration of the inclination adjustment mechanism of the treadmill

Figure 2 is a side view showing the reaction force distribution with respect to the load of Figure 1

3 to 7 relates to an actuator for tilt adjustment of a treadmill according to an embodiment of the present invention,

Figure 3 is a perspective view showing the configuration of the expansion link contracted state

FIG. 4 is a perspective view showing the configuration of the stretched and extended link of FIG.

5 is a perspective view showing a configuration further including a hinge bracket in the configuration of FIG.

FIG. 6 is a perspective view showing a configuration of FIG. 5 viewed from another direction

Figure 7 is a plan view of Figure 5

Figure 8 is a schematic diagram showing the configuration of the inclination adjustment actuator of the treadmill according to another embodiment of the present invention

9 to 12 are related to the inclination adjusting mechanism of the treadmill according to an embodiment of the present invention using the actuator of FIG.

9 is a perspective view showing the treadmill in the state of high inclination

FIG. 10 is a perspective view showing the configuration of the treadmill with the drive part cover of FIG. 9 removed; FIG.

Fig. 11 is a perspective view showing the configuration of the treadmill with the drive part cover removed in a low inclination state;

Figure 12 is a side view of Figure 10

FIG. 13 is a diagram for explaining the truss structure of a three-section link that distributes load; FIG.

** Description of symbols for the main parts of the drawing **

100: treadmill 110: track portion

111: body bracket 112: track belt

113: side cover 114: rotation support bracket

120: track drive unit 121: track drive motor

122: connecting belt 123: drive roller

124: idler roller 125: drive section cover

130: actuator 131: actuator drive motor

132: reduction unit 133: pinion gear

134: idler pulley 135,136: drive pulley

137: power transmission belt 138: hinge bracket

138a: third hinge portion 140: elastic member

141: housing 141a: second hinge portion

142: screw rod 150: front support

151: support member 151a: first hinge portion

152: roller 153: connecting member

160: rear support

The present invention relates to a treadmill exercise mechanism, and more particularly, to an actuator for tilt adjustment of a treadmill that improves the stability of a track portion of a treadmill adjusted to various inclinations and easily controls the tilt of the track portion, and a tilt adjustment mechanism of the treadmill using the same. .

The treadmill is a treadmill, which is called a treadmill, and is widely used in homes and sports centers because it can bring a walking or running effect in a narrow space by using a belt that rotates in an infinite track. Treadmills can walk or run indoors at a moderate temperature even in winter, and the running speed can be arbitrarily adjusted, so the demand is increasing day by day.

By running or walking with a treadmill, you can not only strengthen your cardiopulmonary function, but also strengthen your lower extremity muscles and control your weight by consuming enough calories. Recently released treadmill is equipped with a tilt control mechanism that can adjust the slope to maximize the effect of the movement.

More specifically, the treadmill is configured to include a track unit for the user walking or running on a foot, and a tilt adjusting mechanism for supporting the track unit and adjusting the inclination.

As shown in Fig. 1 and Fig. 2, the treadmill equipped with the conventional inclination adjusting mechanism includes a track portion 10 on which the user climbs and performs a walking or running movement, and supports the track portion 10 and the bottom surface of the treadmill. And an actuator 30 for supporting the load 20 and the load 10 transmitted from the track 10 and for adjusting the inclination of the track 10.

The track unit 10 includes a frame 11 supporting a load of the user, a belt 12 rotating in an infinite track so that the user can continuously walk or run on the upper surface of the track unit 10. , A roller 13 supporting both sides of the belt 12, a motor 14 driving one roller 13, and a connecting portion 15 connected to the actuator 30.

The support portion 20 has a base frame 21 widely installed on the bottom surface, and a fixing member 22 having one end fixed to the base frame 21 and the other end 22a rotatably fixed to the track portion 10. It consists of.

The actuator 30 includes an elastic member 32 having one end 32a rotatably fixed to the connecting portion 15 of the track portion 10 and the other end 32b rotatably coupled to the base frame 21. It consists of a drive unit 31 for controlling the stretching and contraction of the elastic member (32).

The inclination adjustment of the conventional treadmill configured as described above is the inclination of the track portion 10 by the expansion and contraction of the elastic member 32 in the direction of the arrow indicated by the reference numeral 30a. At this time, the load and the impact by the user when the user moves on the track portion 10, as shown in Figure 2, the foot of the user is a distance d1 from the other end 22a of the fixing member 22 The focus is on the part. That is, the load Fa acting on the actuator 30 while being concentrated in front of the track portion 10 and the track portion 10 is parallel to the ground acts according to the following equation (1). .

Fa '= F _l x (d1 / d2)

Typically, d2 is d1 is smaller design and is designed so large, the load (Fa ') acting on the actuator 30 is the user of the load (F _l) is the amplification times (d1 / d2) action. Moreover, a large moment is acted on the actuator 30 due to the load F ₁ generated during the movement of the user. Therefore, the conventional inclination control mechanism requires the installation of a large-capacity actuator that can withstand large loads, and thus has a problem in that manufacturing cost and power consumption increase.

In addition, in view of the fact that the height from the base frame 21 to the track portion 10 is manufactured to maintain a short distance as possible to give a sense of stability to the user, the distance between the track portion 10 and the base frame 21 It is not easy to install the large-capacity actuator 30 in a narrow space. Therefore, there may be a way to install a pair of actuators 30 on both sides of the track portion 10, in this case, it is necessary to control two actuators 30 at the same time, to control the two actuators 30 If the driving deviation of the actuator 30 even slightly occurs in the process, the track unit 10 also has a problem that is inclined in the width direction to cause anxiety of the user.

The present invention has been made to solve the above problems, it is installed for adjusting the inclination of the treadmill is installed by stretching the two elastic members by the same length by treadmill that can maintain the track part in a stable posture and can easily adjust the inclination of the track part It is an object of the present invention to provide an actuator for tilt adjustment.

Another object of the present invention is to configure the inclination adjusting mechanism of the treadmill by using the actuator, by implementing a structure to minimize the load and moment acting on the elastic member of the actuator treadmill that can be manufactured at low cost with improved durability It is to provide a tilt control mechanism.

The present invention is a treadmill capable of adjusting the inclination of the track portion in order to achieve the above object, the drive motor; A pinion that rotates with power of the drive motor; A belt engaged with the pinion to transmit power of the drive motor; A pair of drive pulleys engaged with the belt and rotating; A screw rod fixed to one end of the driving pulley; A housing having a female thread portion engaged with a screw thread of the screw rod, wherein the female thread portion is coupled to the screw rod; It includes, it provides an actuator for adjusting the tilt of the treadmill, characterized in that configured to move the pair of screw rods at the same time by the drive of the drive motor.

This is to rotate the pair of drive pulleys simultaneously by interlocking the power of the drive motor with the belt so that the screw rods are inserted or withdrawn in the same amount from the housing.

Here, the belt further comprises an idler pulley, wherein the belt is configured to connect the pinion, the idler pulley, and the pair of drive pulleys in order to transmit power, the belt in contact with the pinion Since the contact angle of the (wrapping angle) is increased to increase the friction force it is possible to transmit the drive power to the drive pulley while reducing the loss of drive power.

In addition, grooves are formed on the outer circumferential surfaces of the pinion, the idler pulley, and the driving pulley, and protrusions that engage with the groove are periodically formed on one surface of the belt in contact with the pinion, the idler pulley, and the driving pulley. The sliding between the pair of drive pulleys and the belt is essentially eliminated and the friction force is increased to precisely control the amount of movement of the screw rod.

In addition, the hinge bracket is formed to surround the pinion, the belt, the drive pulley to install them as a module; Hinge parts formed at both ends of the hinge bracket; A hinge portion formed in the housing; It is effective to include. This is to facilitate installation as a tilt adjusting mechanism of the treadmill by forming hinges at both ends of the actuator.

On the other hand, by using a chain instead of the belt can implement an actuator for tilt adjustment of the treadmill to implement the same function.

In addition, by using a connection gear instead of the belt and idler pulley, a drive motor; A pinion that rotates with power of the drive motor; A pair of connecting gears which rotate in engagement with both sides of the pinion; A pair of drive gears engaged with the connection gears and rotating; A screw rod fixed to one end of the drive gear; It may have a female screw portion engaging with the male screw portion of the screw rod, the housing is coupled to the screw rod to the female screw portion.

Here, the connecting gear may be formed in plural because the connecting gear connects the pinion and the driving gear installed on the hinge bracket having a long width.

On the other hand, in a treadmill having a track portion and the inclination adjusting mechanism for adjusting the inclination of the track portion, the treadmill has a first hinge portion formed on both sides of the track portion so as to be rotatable, and connects the bottom surface from the first hinge portion. A pair of support members formed to permit; A pair of housings each having a second hinge portion coupled to the pair of support members so as to be rotatable, and having a female screw portion at the other end; A pair of screw rods engaged with the female screw portion of the housing; A pair of driving pulleys respectively coupled to one end of the pair of screw rods; A belt for transmitting rotational power in contact with an outer circumferential surface of the pair of drive pulleys; A pinion installed to contact the outer circumferential surface of the belt to transmit power to the pair of drive pulleys through the belt; A drive motor for transmitting power to the pinion; A hinge bracket formed to surround the pinion, the drive pulley and the belt, and having a third hinge portion coupled to the track portion at both ends to be rotatable; Including, the first, second, third hinge provides a tilt adjustment mechanism of the treadmill, characterized in that configured to form a three-section link structure.

This is because the track portion can be stably supported. In addition, by placing the actuator at the front part where the user's foot is in contact with the user, the actuator is not concentrated on the screw rod of the actuator, thereby improving durability and reducing the manufacturing cost. Applicable.

Here, the structure further includes a connection member for connecting the pair of support members can achieve stability of the support member.

In addition, the second hinge portion is easily formed on the connecting member in terms of the installation of the housing connected to the screw rod.

In addition, it is effective that the support member further includes a roller at a position in contact with the bottom surface, since the friction between the support member and the bottom surface can be reduced when the inclination of the track portion is adjusted.

In addition, when the length of the support member is L, the second hinge portion is preferably formed at a position of 0.1L to 0.5L from one end of the support member in contact with the bottom surface. That is, the second hinge portion formed close to the bottom surface can reduce the load acting on the screw rod.

On the other hand, the connecting gear may be used as a power transmission means of the actuator of the tilt control mechanism of the treadmill.

Hereinafter, the configuration of the inclination adjustment actuator of the treadmill according to an embodiment of the present invention with reference to the drawings.

3 to 7 are related to the actuator for adjusting the inclination of the treadmill according to an embodiment of the present invention, Figure 3 is a perspective view showing the configuration of the expansion link contraction state, Figure 4 is the expansion link of Figure 3 5 is a perspective view showing the configuration of the extended state, Figure 5 is a perspective view showing a configuration further including a hinge bracket in the configuration of Figure 3, Figure 6 is a perspective view showing a configuration seen from another direction Figure 5, Figure 7 is a Figure 5 Top view of the.

As shown in the figure, the actuator 130 for adjusting the inclination of the treadmill according to an embodiment of the present invention, the power drive unit for generating and transmitting the drive power of the actuator, and the length is stretched by receiving power from the power drive unit It is configured to include a member 140.

The power drive unit is connected to an actuator drive motor 131 that receives rotational power to generate rotational power, a reduction unit 132 that decelerates a high rotational speed of the drive motor 131 at a low speed, and a reduction unit 132. And an idler pulley connected to the pinion 133 that rotates, the power transmission belt 137 that transmits the rotational power of the pinion 133, and the pinion 133 and the belt 137 to convert the connection path of the belt ( The idler pulley 134, the idler pulley 134 and the belt 137 are connected to the drive pulleys 135 and 136 to which power is transmitted, and the pinion 133 and the pulleys 134, 135 and 136 can be installed as one module. A hinge bracket 138 formed to wrap, a hinge protrusion 138a protruding from both ends of the hinge bracket 138, and a fixing bracket 139 formed on the bottom surface of the hinge bracket 138 to fix and install the reduction unit 132. It is provided.

Here, the belt 137 and the pinion 133, the idler pulley 134 and the pair of drive pulleys (135, 136) so that no slip is generated periodically on the outer peripheral surface of the pinion 133 and pulleys (134, 135, 136) A groove (not shown) is formed, and the belt 137 is effectively a timing belt in which protrusions (not shown) are formed periodically so as to engage these grooves on a surface in contact with the grooves of the pulley. At this time, by twisting 180 degrees between the pinion 133 and the idler pulley 134 and the idler pulley 134 and the driving pulley 135 indicated by reference numeral 137a, the universal timing belt having protrusions formed on only one surface thereof. Will be available.

In addition, by installing the idler pulley 134 in the driving power unit, it is possible to increase the driving friction force by increasing the wrapping angle α surrounding the pinion to 180 ° or more.

The elastic member 140, the driving pulley (135, 136) is fixed to the upper end and rotates integrally with the drive pulley, the screw rod 142 and the screw rod 142 is formed, the male screw portion is formed over the entire length, or The female screw portion coupled to the male screw portion of the screw rod 142 is configured to include a housing 141 formed on the inner circumferential surface thereof.

Here, a hinge hole 141a is formed at a lower end of the housing 141 so as to be rotatably installed on the treadmill. In addition, as the driving pulleys 135 and 136 rotate, the driving pulleys 135 and 136 and the hinge bracket 138 are integrally provided with a nut 142b fixed to the front of the driving pulleys 135 and 136 so as to move up and down. Here, a groove 142a is formed in the circumferential direction between the nut 142b and the driving pulleys 135 and 136 so that the rotation bracket 138 is installed to be caught by the groove 142a.

In the drawings, reference numeral 132a denotes a bearing installation unit supporting rotation of the rotation shaft 132b connecting the reduction unit 132 and the pinion 133, and 139a attaches the fixing bracket 139 to the hinge bracket 138. Fixing bolt to fix.

Hereinafter, the operating principle of the actuator 130 according to an embodiment of the present invention will be described in detail.

When the actuator driving motor 131 is rotationally driven such that the contracting and contracting member 140 shown in FIG. 3 is in the extended state shown in FIG. 4, the pinion 133 receives power through the reducer 132. Rotationally driven in the counterclockwise direction 133c, the idler pulley 134 rotates in the clockwise direction 134c as the rotational power is transmitted through the belt 137, and the pair of drive pulleys 135 and 136 rotate counterclockwise. Rotate to (135c, 136c). At this time, since one end 141a of the housing 141 is fixed to another structure and the movement is constrained, the pair of screw rods 142 integrally rotate with the fixing pulleys 135 and 136 to rotate by the same angle and thus the housing. The pair of screw rods 142 are drawn out from the upper portion 142c by the same amount from the 141 so that the length d of the elastic member 140 becomes long.

Likewise, when the actuator driving motor 131 is rotationally driven such that the stretchable member 140 in the extended state shown in FIG. 4 is in the contracted state shown in FIG. 3, the pinion 133 receives power from the reducer 132. ) Rotates clockwise 133c, the idler pulley 134 rotates counterclockwise 134c as rotational power is transmitted through the belt 137, and the pair of drive pulleys 135,136 clockwise In directions 135c and 136c. At this time, since one end 141a of the housing 141 is fixed to another structure and the movement is constrained, the pair of screw rods 142 are rotated by the same angle integrally with the fixing pulleys 135 and 136. The pair of screw rods 142 are inserted into the housing 141 in the lower portion 142c by the same amount so that the length d of the elastic member 140 is shortened.

In this way, by using the actuator 130, it is possible to precisely control the length of the two elastic members 140 at the same time.

On the other hand, the actuator for adjusting the inclination of the treadmill of the present invention may be configured to be driven by transmitting power from the drive motor to the screw rod of the elastic member using a plurality of gear groups.

Hereinafter, another embodiment of the present invention composed of a plurality of gear groups will be described in more detail.

As shown in FIG. 8, the inclination adjustment actuator 230 according to another embodiment of the present invention configured to transmit power to a plurality of gear groups includes a power drive unit for generating power and transmitting power from the power drive unit; It is configured to include an elastic member 140 is stretched length using. Here, since the configuration of the stretchable member 140 is the same as or similar to that of the above-described embodiment, a description thereof will be omitted below.

The power drive unit includes a pinion gear 233 that rotates using power of a drive motor 131 that receives rotational power and generates rotational power, and connecting gears 234, 234 ′ and 234 ″ engaged with the pinion gear 233. And a pair of drive gears 235 and 236 fixed to rotate in engagement with the connecting gears 234 to 234 "and to rotate integrally with the screw rod 142, so that the gears 233 to 236 are installed as one module. It is configured to include a hinge bracket 138 formed to surround them.

Here, when the pinion gear 233 is located at the center of the hinge bracket 138, the connecting gear 126 may be formed symmetrically, but the pinion gear 233 is not located at the center of the hinge bracket 138. The connecting gear 126 cannot be formed symmetrically. For example, as shown in FIG. 8, when the pinion gear 233 is eccentrically leftward from the center, one connecting gear 234 is installed between the pinion gear 233 and the left driving gear 135. Three connecting gears 234, 234 ', 234 "are installed between the pinion gear 233 and the right drive gear 136. That is, the number of left and right connecting gears is not necessarily the same, and gears to mesh with each other. Teeth may be formed. At this time, even if the number of left and right connecting gears 234-234 "is different, if the number of connecting gears 234 on one side is odd, the number of connecting gears 234-234" on the other side may be different. If the number of connecting gears 234 on one side is an even number, the number of connecting gears 234-234 ″ on the other side must be an even number so that the direction of movement of the left and right screw rods 142 can be matched.

The operating principle of the actuator 230 configured as described above will be described in detail.

When the actuator drive motor 131 is rotationally driven to adjust the length of the elastic member 140, the pinion gear 233 is rotationally driven via the reducer 132, and one or more meshes with the pinion gear 233. The connecting gear 234 is also driven to rotate, and the fixed pulleys 235 and 236 which are engaged with the connecting gear 234 are rotated, so that the fixed pulleys 235 and 236 and the fixed screw rod 142 move in the vertical direction. ) Length is controlled.

Further, although the power transmission by the engagement of the belt and the gear as an embodiment of the present invention has been described above, the present invention includes driving the drive pulleys (135, 136) by chain from the pinion (133), drive gear (235,236) ) To form a stretchable member with a rack gear that meshes with "

On the other hand, according to another field of the invention, the present invention provides a tilt control mechanism of the treadmill using the above-described actuator for tilt adjustment of the treadmill. Hereinafter, with reference to the accompanying drawings will be described in detail the treadmill inclination adjusting mechanism according to an embodiment of the present invention.

9 is a perspective view showing a treadmill in a state of high inclination, Figure 10 is a perspective view showing the configuration of the treadmill with the drive unit cover of Figure 9 removed, a treadmill having a tilt adjusting mechanism according to an embodiment of the present invention ( 101 is a track part 110 for the user to walk or run, track drive part 120 for driving the footrest belt of the track part 110, and inclination adjustment for adjusting the inclination of the track part 110; And a mechanism, a rear support 160 supporting the rear portion of the track portion 110, and a support portion 170 protruding in the longitudinal direction from the track portion 110.

The track part 110 may include a main body bracket 111 formed to surround the bottom surface of the track part 110, a footrest (not shown) embedded in the main body bracket 111 to support a load from a user, and A support frame (not shown) embedded in the main body bracket 111 to support the footrest, a track belt 112 formed to surround the top and bottom of the footrest, and rotating in an infinite track, and both upper and lower sides of the main body bracket 111 are covered. A rotation support bracket 114 having a side cover 113 and a mounting hole 114a engaged with the hinge protrusion 138a of the actuator 130 and attached to an upper surface of the front portion of the main body bracket 111; The main bracket 111 to facilitate the installation of the first hinge bracket 115 formed on the bottom surface of the main body bracket 111 and the support unit 170 so that the first hinge portion 151a of the front support 150 is installed. It is provided with a strut mounting stand 116 formed on the upper surface.

The track drive unit 120 includes a track drive motor 121 that generates power for rotating the track belt 112 of the track unit 110, and a connection belt 122 that transmits power of the track drive motor 121. ), A drive roller 123 connected to the connecting belt 122 and rotating, an idler roller 124 installed at the rear of the track part 110, and easy access to the drive motor 121 from the outside is blocked. And a driver cover 125 formed to be.

The front support member 150 is a pair of support members 151 rotatably coupled to the first hinge brackets 115 provided on both bottom surfaces of the track portion 110 to form the first hinge portion 151a, A roller 152 formed at an end of the support member 151 so as to smoothly rotate the support member 151 about the first hinge portion 151a, and a connection bracket 153 connecting the support member 151. .

The rear support 160 is formed of a rubber plate in contact with the bottom surface 199 to prevent the treadmill is easily moved or twisted by a small force.

The strut portion 170 is a strut 171 formed in a hollow shape to be coupled to the strut mounting bracket 116 in a state where one end is fitted, a handle 172 attached to the other end of the strut 171, and a user It is provided with a control panel 173 installed to enter an exercise program and view exercise information.

The inclination adjustment mechanism includes an actuator 130 for adjusting the length of the elastic member 140 to adjust the inclination of the track portion 110, and the front support 150 for supporting the front portion of the track portion 110; It is composed.

Here, the actuator 130 is shown in Figures 3-7 and is configured as described above. Then, the method for installing the actuator 130 in the treadmill is as follows. That is, the elastic member 140 is inserted in the state where the hinge protrusion 138a of the actuator 130 is inserted into the installation hole 114a of the rotation support bracket 114 of the track unit 110 to form the third hinge portion 138a. The second hinge portion 141a is inserted into the recess 153a of the connecting member 153, and the hinge hole 141a and the recess 153 of the housing 141 are rotatably coupled to each other. ).

Therefore, the inclination adjustment mechanism of the treadmill of the present invention, as shown in Figure 13, as each vertex is formed in a truss structure of a three-section link consisting of hinge parts 151a, 141a, 138a that can be rotated, the user By effectively distributing the load from the stepping foot, it is possible to prevent excessive force from being applied to a particular member.

In addition, the inclination adjustment mechanism supports the both sides of the track portion 110 by two elastic members 140, so that the user in the width direction of the track portion 110 while walking or running on the track portion 110 It is possible to prevent the shaking or the unstable state.

The operating principle of the inclination adjusting mechanism of the treadmill according to the embodiment of the present invention configured as described above can be easily inferred as the operating principle of the actuator described above with reference to FIGS. 3 and 4. That is, by driving the actuator drive motor 131 in a different rotational direction, the length of the screw rod 142 drawn out from the housing 141 is changed, so that the length d of the elastic member 140 is in the direction of 141d. As stretched, the inclination of the track portion 110 is adjusted to be higher and lower. FIG. 12 illustrates a state in which the inclination of the track 110 is inclined downhill of about −10 ° to 0 ° with the length d of the elastic member 140 being shortened.

Referring to FIG. 12, when the load Fp of the user's foot acts on the front portion B of the track portion 110 on which the user steps, as shown in FIG. 12, the elastic member of the actuator 130 is stretched. The reaction force Fa for 140 and the reaction force Fs acting on the support member 150 are obtained as in Equations 2 and 3 below.

Fs = Fp x (L2 / L1)

Fa = Fp x (L4 / L3)

Therefore, unlike the conventional reaction force (refer to Equation 1) for the tilt adjusting mechanism of the treadmill, the axial reaction force Fa acting on the elastic member 140 of the actuator 130 is not amplified by the load Fp. Only a smaller load is received. Furthermore, since both ends of the actuator 130 are formed by the hinge parts 138a and 141a, moments do not act on the elastic member 140. In general, in view of the fact that the member is broken due to the cracking caused by the bending fatigue load, there is no moment acting on the elastic member 140, so the endurance life of the actuator 130 becomes semi-permanently. In addition, since the moment and reaction force Fa applied to the elastic member 140 are minimized, the capacity of the driving motor 131 for driving the actuator 130 can be reduced, and the housing 141 of the elastic member 140 can be reduced. And the weight of the screw rod 142 can be reduced. Therefore, the power consumption required for driving the actuator 130 may be reduced, and the manufacturing cost may also be reduced.

Furthermore, by forming the position of the second hinge portion 141a away from the track portion 110, the reaction force in the axial direction applied to the elastic member 140 may also be significantly reduced. Therefore, when the length of the supporting member 151 is L5, it is more effective that the length of L3 is formed larger than 0.5 * L5.

On the other hand, as an actuator used in the inclination adjusting mechanism of the treadmill according to an embodiment of the present invention described above for example an actuator to which the power is transmitted by the belt, the present invention can control the two elastic members 140 at the same time And a tilt adjustment mechanism of the treadmill to which the actuator of the present type is applied. In addition, although one embodiment of the present invention implements a truss-type inclination adjusting mechanism having a three-section link consisting of three hinge parts 151a, 141a, and 138a using two elastic members 140, the present invention is one It can also be implemented as a truss-type inclination control mechanism of the three-section link using the elastic member 140.

Although the preferred embodiments of the present invention have been described above by way of example, the scope of the present invention is not limited to these specific embodiments, and may be appropriately changed within the scope described in the claims.

As described above, the present invention provides a drive motor, a pinion that rotates with the power of the drive motor, a belt that meshes with the pinion to transmit power of the drive motor, a pair of drive pulleys that mesh with the belt and rotate; And a screw rod having one end fixed to the driving pulley and a female thread portion engaged with a screw thread of the screw rod, and including a housing coupled to the screw rod with the female thread portion to facilitate tilt adjustment of the track portion of the treadmill. It provides an actuator for tilt adjustment of the treadmill which can be easily stretched by the same length of the two stretching members consisting of a screw rod and a housing so as to maintain a negative stable posture.

In addition, the present invention provides a treadmill inclination adjustment mechanism using the actuator, by supporting both sides of the track portion with two elastic members, so that the track portion in the width direction during the user walking or running on the track portion 110 It is possible to prevent the rocking or unstable state.

In addition, the present invention, by configuring the treadmill inclination adjusting mechanism in the front portion of the track portion with a three-section truss structure consisting of three hinge parts, it is possible to minimize the load acting on the elastic member and to remove the moment, Since the thickness and size of the members can be reduced, manufacturing cost can be reduced, and the durability life of each member of the inclination control mechanism is semi-permanently extended. In addition, since it is possible to reduce the capacity of the drive motor for driving the actuator, it is possible to reduce the consumption of power required to drive the actuator, it is possible to reduce the manufacturing cost input to the drive motor.

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Claims (23)

In the treadmill which can adjust the inclination of the track part, A drive unit; A pinion which is rotationally driven by the drive unit; A pair of connecting gears which rotate in engagement with both sides of the pinion; A pair of drive gears engaged with the connection gears and rotating; A screw rod fixed to the drive gear; A housing having a female screw portion engaged with the male screw portion of the screw rod, the housing being coupled to the screw rod with the female screw portion; Including, the actuator for inclination adjustment of the treadmill, characterized in that configured to move the pair of screw rods at the same time by the drive of the drive unit. The method of claim 1, And a plurality of the connecting gears are formed between the pinion and the driving gear. In the treadmill which can adjust the inclination of the track part, A drive unit; A pinion which is rotationally driven by the drive unit; A belt engaged with the pinion to transmit a driving force of the driving unit; A pair of drive pulleys engaged with the belt and rotating; A screw rod fixed to the driving pulley; A housing having a female thread portion engaged with a screw thread of the screw rod, wherein the female thread portion is coupled to the screw rod; Including, the actuator for inclination adjustment of the treadmill, characterized in that configured to move the pair of screw rods at the same time by the drive of the drive unit. The method of claim 3, wherein The belt further includes an idler pulley, And the belt is configured to connect the pinion, the idler pulley, and the pair of driving pulleys sequentially to transmit driving force. The method according to claim 3 or 4, Grooves are formed in the outer circumferential surface of the pinion, the idler pulley, and the driving pulley, The pinion, the idler pulley, the actuator for tilt adjustment of the treadmill, characterized in that the projection periodically engaging the groove on one surface of the belt in contact with the drive pulley. The method according to claim 3 or 4, A hinge bracket configured to install the pinion, the belt, and the driving pulley as a module; Bracket hinge parts formed at both ends of the hinge bracket; A hinge portion formed in the housing; Actuator for tilt adjustment of the treadmill, characterized in that configured to include. In the treadmill which can adjust the inclination of the track part, A drive unit; A pinion which is rotationally driven by the drive unit; A chain engaged with the pinion to transmit power of the drive motor; A drive pulley that rotates in engagement with the chain; A screw rod fixed to one end of the driving pulley; A housing having a female thread portion engaged with a screw thread of the screw rod, wherein the female thread portion is coupled to the screw rod; Including, the actuator for inclination adjustment of the treadmill, characterized in that configured to move the pair of screw rods at the same time by the drive of the drive motor. delete In a treadmill provided with a track portion, The track portion includes a first hinge portion and a third hinge portion that can be rotatably coupled, A support member rotatably coupled to the first hinge portion of the track portion and extending to the bottom surface; An elastic member rotatably coupled to the support member at a second hinge portion and rotatably coupled to the third hinge portion of the track portion; And the first, second, and third hinge parts form a three-link structure, and adjust the inclination of the track part by extension and contraction of the elastic member between the second hinge part and the third hinge part. And the support member and the stretchable member are formed in pairs on both side portions of the track part. The method of claim 9, The pair of elastic members, A pair of housings having one end rotatably coupled to the second hinge portion and having a female threaded portion; A pair of screw rods engaged with the female threaded portions of the pair of housings; Consists of, so that the pair of screw rods rotate and move simultaneously with respect to the pair of housings, A pair of driving pulleys respectively coupled to the pair of screw rods; A belt for transmitting rotational power in contact with an outer circumferential surface of the pair of drive pulleys; A pinion installed to contact the outer circumferential surface of the belt to transmit power to the pair of drive pulleys through the belt; A drive unit for rotating the pinion; A hinge bracket for rotatably fixing the pinion and the driving pulley and pivotally fixed to a third hinge portion of the track portion; Inclination mechanism of the treadmill, characterized in that further comprises. The method of claim 10, The screw rod is inclined adjustment mechanism of the treadmill, characterized in that coupled to the drive pulley to rotate integrally with the drive pulley. The method of claim 11, Further comprising an idler pulley over which the belt spans, The belt is inclined adjustment mechanism of the treadmill, characterized in that configured to transmit power by connecting the pinion, the idler pulley, and the drive pulley. The method of claim 12, Grooves are periodically formed on outer surfaces of the pinion, the idler pulley and the driving pulley, The belt is inclined adjustment mechanism of the treadmill, characterized in that a projection engaging with the groove on the surface in contact with the pinion, the idler pulley, the drive pulley. The method of claim 9, And a connecting member for connecting between the pair of supporting members, wherein the second hinge portion is formed in the connecting member. delete The method of claim 10, The inclination adjusting mechanism of the treadmill, characterized in that the support member further comprises a roller in a position in contact with the bottom surface. The method of claim 10, If the length of the support member is L, The second hinge portion is inclined adjustment mechanism of the treadmill, characterized in that formed in a position of 0.1L to 0.5L from one end of the support member in contact with the bottom surface The method of claim 9, The pair of elastic members, A pair of housings having one end rotatably coupled to the second hinge portion and having a female threaded portion; A pair of screw rods engaged with the female threaded portions of the pair of housings; Consists of, so that the pair of screw rods rotate and move simultaneously with respect to the pair of housings, A pair of drive gears respectively coupled to one end of the pair of screw rods; A pinion interlocking with the drive gear to rotate the drive gear; A drive unit which drives the pinion to rotate; A hinge bracket for rotatably fixing the pinion and the drive gear and pivotally fixed to a third hinge portion of the track portion; Inclination mechanism of the treadmill, characterized in that further comprises. The method of claim 18, The screw rod is inclined adjustment mechanism of the treadmill, characterized in that coupled to the drive gear to rotate integrally with the drive gear. The method of claim 18, And a connecting gear configured to engage the pinion and the drive gear between the pinion and the drive gear so that the pinion rotates the drive gear. The method of claim 9, The inclined adjustment mechanism of the treadmill, characterized in that the roller is attached to the portion where the support member and the bottom surface contact. In a treadmill provided with a track portion, A first hinge part formed to be rotatably coupled to each other, and a third hinge part formed to be spaced apart from the first hinge part by a predetermined distance, one pair is formed at both ends of one end of the track part, A pair of support members rotatably coupled to the pair of first hinge parts and extending to the bottom surface; A pair of housings having one end rotatably coupled to the support member at a second hinge portion and having a female screw portion; A pair of screw rods engaged with the female threaded portions of the pair of housings; A pair of driving pulleys which rotate integrally with the pair of screw rods; A belt for transmitting rotational power in contact with an outer circumferential surface of the pair of drive pulleys; A pinion installed to contact the outer circumferential surface of the belt to transmit power to the pair of drive pulleys through the belt; A drive unit for rotating the pinion; A hinge bracket for rotatably fixing the pinion and the driving pulley and pivotally fixed to a third hinge portion of the track portion; And the first, second, and third hinge portions form a three-section link structure, and the pair of screw rods are inserted into and withdrawn from the pair of housings by driving the driving portion, thereby providing the second hinge portion. And adjusting the inclination of the track part in accordance with a change in the distance between the third hinge part and the treadmill. In a treadmill provided with a track portion, A first hinge part formed to be rotatably coupled to each other, and a third hinge part formed to be spaced apart from the first hinge part by a predetermined distance, one pair is formed at both ends of one end of the track part, A pair of support members rotatably coupled to the pair of first hinge parts and extending to the bottom surface; A pair of screw rods having one end rotatably coupled to the support member at a second hinge portion; A pair of housings each having a female thread portion engaged with a screw portion of the screw rod; A pair of drive pulleys integrally rotating with the pair of housings; A belt for transmitting rotational power in contact with an outer circumferential surface of the pair of drive pulleys; A pinion installed to contact the outer circumferential surface of the belt to transmit power to the pair of drive pulleys through the belt; A drive unit for rotating the pinion; A hinge bracket for rotatably fixing the pinion and the driving pulley and pivotally fixed to a third hinge portion of the track portion; And the first, second, and third hinge portions form a three-section link structure, and the pair of screw rods are inserted into and withdrawn from the pair of housings by driving the driving portion, thereby providing the second hinge portion. And adjusting the inclination of the track part in accordance with a change in the distance between the third hinge part and the treadmill.

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