CN115955051A - Motion structure and moxibustion system - Google Patents

Abstract

The invention relates to a movement structure comprising: the output shaft of the driving motor can rotate forwards and reversely, the first ratchet mechanism comprises a first ratchet wheel, the first ratchet wheel is fixedly connected with the output shaft, and a first outer wheel of the first ratchet wheel can only rotate through the forward rotation of the output shaft. The synchronizing wheel system comprises a synchronizing wheel, the synchronizing wheel is coaxially connected with the output shaft, and the synchronizing wheel can rotate along with the reverse rotation of the output shaft. The ball screw mechanism comprises a screw rod and a nut, and the screw rod or the nut rotates along with the synchronizing wheel and outputs linear motion. Because this application only needs a motor just can realize linear motion and the rotary motion of discontinuous operation and combines together, can realize rotary motion and linear motion's the separation of each other simultaneously according to the selection of difference, so the function is more, and the structure is also simpler, need not use a plurality of motors and control system, so the volume is also less, and economic cost is lower.

Description

Motion structure and moxibustion system

Technical Field

The invention relates to the field of moxibustion automation, in particular to a motion structure and a moxibustion system.

Background

Generally, a mechanical system is composed of a power system, a transmission system, an execution system and a control system, and the common power system can be various driving motors, electric motors, motors and the like; the common transmission systems include a gear system, a conveyor belt system, etc. which convert the power output by the power system into different motions, an execution system is usually connected to the transmission system and is responsible for meeting the daily needs of people, and a control system is responsible for controlling the motions of the power system, the transmission system and the execution system, and if the mechanical system is simple in structure, the control system can be omitted.

With the development of the technology, the field of moxibustion gradually starts to use a mechanical transmission structure to reduce labor cost, the moxibustion therapy usually involves rotating acupuncture and moxibustion and up-down point moxibustion, the mechanical movement is converted into rotating movement and linear movement, and the rotating movement needs to be operated discontinuously due to the particularity of moxibustion. At present, the mechanical system design that can combine together the rotary motion of interrupted operation and linear motion is all comparatively complicated, and control system and driving system are also more, so with high costs, bulky, be not suitable for the moxa-moxibustion.

Disclosure of Invention

Based on the above, the invention provides a motion structure which is simple in structure and small in size on the basis of the combination of linear motion and intermittent rotary motion. The method comprises the following steps:

a drive motor including an output shaft for outputting torque, the output shaft being capable of forward rotation and reverse rotation;

the first ratchet mechanism comprises a first ratchet wheel, the first ratchet wheel is connected with the output shaft, and a first outer wheel of the first ratchet wheel can only rotate along with the forward rotation of the output shaft;

the synchronous wheel system at least comprises a synchronous wheel, the synchronous wheel is coaxially connected with the output shaft, and the synchronous wheel can rotate along with the reverse rotation of the output shaft;

the ball screw mechanism comprises a screw rod and a nut, the nut is sleeved on the screw rod, the screw rod or the nut is coaxially and fixedly connected with the synchronizing wheel, so that the screw rod or the nut rotates along with the synchronizing wheel, one of the screw rod and the nut is fixed in position along a first direction, the other one of the screw rod and the nut moves along the first direction when the synchronizing wheel rotates, and the first direction is the length direction of the screw rod.

In one embodiment, the first ratchet mechanism further comprises a first inner wheel, the first inner wheel and the first outer wheel are concentrically arranged, the first inner wheel is fixedly connected with the output shaft, the first inner wheel comprises a plurality of first pawls arranged at intervals along the circumferential surface and a first elastic piece driving the first pawls to be attached to the tooth back of the first outer wheel, and the first pawls can only push the first outer wheel to rotate along with the forward rotation of the output shaft.

In one embodiment, the synchronizing wheel system is a second ratchet mechanism, the synchronizing wheel is a second ratchet comprising a second outer wheel, the second outer wheel being only rotatable upon reverse rotation of the output shaft.

In one embodiment, the second ratchet mechanism further comprises a second inner wheel, the second inner wheel and the second outer wheel are concentrically arranged, the second inner wheel is fixedly connected with the output shaft, the second inner wheel comprises a plurality of second pawls arranged at intervals along the circumferential surface and a second elastic piece driving the second pawls to be attached to the tooth backs of the second outer wheel, and the plurality of second pawls can only push the second outer wheel to rotate along with the reverse rotation of the output shaft.

In one embodiment, the output shaft drives the screw rod to rotate through the second ratchet wheel, and the screw rod or the nut moves linearly.

In one embodiment, the nut further comprises a shell, the lead screw is rotatably connected with the shell, and the lead screw can rotate relative to the nut and can move linearly relative to the nut.

In one embodiment, the device further comprises a third elastic member, one end of the third elastic member is fixedly connected with the nut, the other end of the third elastic member is fixedly connected with the shell, and the third elastic member is used for driving the shell to move close to the nut.

In one embodiment, the shell further comprises a fixing flange, the side wall of the shell is provided with a plurality of through grooves, a plurality of protrusions of the fixing flange extend out of the through grooves in a one-to-one correspondence mode and are fixed with the outside, and the nut is connected with the shell in a sliding mode through the fixing flange.

The exercise structure comprises: the driving motor is provided with an output shaft for outputting torque, the output shaft can rotate forwards and backwards, and the driving motor is responsible for providing power for the movement of the whole movement structure. The first ratchet mechanism comprises a first ratchet wheel which is fixedly connected with the output shaft, and a first outer wheel of the first ratchet wheel can rotate through the forward rotation of the output shaft but cannot rotate along with the reverse rotation of the output shaft. The synchronizing wheel system at least comprises a synchronizing wheel, the synchronizing wheel is coaxially connected with the output shaft, and the synchronizing wheel can rotate along with the reverse rotation of the output shaft. The ball screw mechanism comprises a screw rod and a nut, the nut is sleeved on the screw rod, the screw rod or the nut is coaxially and fixedly connected with the synchronizing wheel, so that the screw rod or the nut can rotate along with the synchronizing wheel, one of the screw rod and the nut is fixed in position along a first direction, the other screw rod and the nut move along the first direction when the synchronizing wheel rotates, and the first direction is the length direction of the screw rod.

Due to the characteristics of the first ratchet wheel, when the output shaft of the driving motor rotates forwards, the first outer wheel of the first ratchet wheel can rotate and then output the rotation motion, and the first outer wheel cannot rotate when the output shaft rotates backwards. Because this application only needs a motor just can realize linear motion and the rotary motion of discontinuous operation and combines together, can realize rotary motion and linear motion's the separation of each other simultaneously according to the selection of difference, so the function is more, and the structure is also simpler, need not use a plurality of motors and control system, so the volume is also less, and economic cost is lower.

The application also provides a moxibustion system, including the motion structure in any above-mentioned embodiment, still include sparrow pecks the moxa stick and circles round the moxa stick, circles round moxa stick and first ratchet fixed connection, and is rotary motion through first ratchet, and sparrow pecks moxa stick and ball screw mechanism fixed connection, and is linear motion through ball screw mechanism.

In one embodiment, the device further comprises a fixing frame, the fixing frame is fixedly connected with a nut in the ball screw mechanism, the rotating moxa roll is located on one side of the fixing frame, and the sparrow pecking moxa roll is located on the other side of the fixing frame.

Foretell moxibustion system has adopted the motion structure that this application provided, so can be automatic provide power, reduced the human cost.

Drawings

FIG. 1 is a front view of a motion feature according to one embodiment of the present application;

FIG. 2 isbase:Sub>A cross-sectional view of the motion feature A-A of the embodiment of FIG. 1;

FIG. 3 is a three-dimensional block diagram of the kinematic structure of the embodiment of FIG. 1;

FIG. 4 is an elevation view of the first ratchet mechanism;

fig. 5 is a front view of the second ratchet mechanism.

Reference numerals: a housing 100; a first ratchet 110; a first outer wheel 111; a first inner wheel 112; a first pawl 1121; the first elastic member 1122; a second ratchet 120; a second outer wheel 121; a second inner wheel 122; a second pawl 1221; a second elastic member 1222; an output shaft 130; a lead screw 140; a nut 150; the third elastic member 160; a mounting flange 170.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will recognize without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

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

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are for purposes of illustration only and do not denote a single embodiment.

Referring to fig. 1 to 3, fig. 1 is a front view of the exercise structure, and fig. 2 is a sectional view of the exercise structure; FIG. 3 is a schematic exterior view of the exercise structure; the invention provides a motion structure which is simple in structure and small in size on the basis of combination of linear motion and intermittent rotary motion. The method comprises the following steps: the device comprises a driving motor, a first ratchet mechanism, a synchronous wheel system and a ball screw mechanism. Wherein the driving motor includes an output shaft 130 for outputting torque, the output shaft 130 being capable of forward and reverse rotation; the first ratchet mechanism comprises a first ratchet wheel 110, the first ratchet wheel 110 is connected with the output shaft 130, and a first outer wheel 111 of the first ratchet wheel 110 can only rotate along with the forward rotation of the output shaft 130; the synchronous wheel system at least comprises a synchronous wheel, the synchronous wheel is coaxially connected with the output shaft 130, and the synchronous wheel can rotate along with the reverse rotation of the output shaft 130; the ball screw mechanism comprises a screw 140 and a nut 150, the nut 150 is sleeved on the screw 140, the screw 140 or the nut 150 is coaxially and fixedly connected with the synchronizing wheel, so that the screw 140 or the nut 150 rotates along with the synchronizing wheel, one of the screw 140 and the nut 150 is fixed in position along a first direction, and the other of the screw 140 and the nut 150 moves along the first direction when the synchronizing wheel rotates, wherein the first direction is the length direction of the screw 140.

Referring to fig. 1 to 3, in one embodiment, the moving structure includes a driving motor, a first ratchet mechanism, a synchronous gear system and a ball screw mechanism. The driving motor can output torque through the output shaft 130, the output shaft 130 can rotate forward or backward, wherein the first ratchet mechanism includes a first ratchet 110, the first ratchet 110 is connected to the output shaft 130, the first outer wheel 111 of the first ratchet 110 can only rotate with the forward rotation of the output shaft 130, the first outer wheel 111 of the first ratchet 110 cannot rotate when the output shaft 130 rotates backward, the synchronizing wheel system includes at least one synchronizing wheel, the synchronizing wheel is coaxially and fixedly connected to the output shaft 130, the synchronizing wheel can rotate with the backward rotation of the output shaft 130, the ball screw mechanism includes a screw 140 and a nut 150, the nut 150 is a ball nut, the nut 150 is sleeved on the screw 140, and the screw 140 or the nut 150 is used for coaxially and fixedly connecting to the synchronizing wheel to make rotational movement, so that when the screw 140 and the synchronizing wheel are coaxially and fixedly connected, the nut 150 can make linear movement.

Similarly, in other embodiments, if the nut 150 is fixed, the screw 140 will drive the output shaft 130 to move linearly; or, when the nut 150 is coaxially and fixedly connected with the synchronizing wheel, the nut 150 rotates, the screw rod 140 moves linearly, and if the position of the screw rod 140 in the first direction is fixed, the nut 150 drives the output shaft 130 to move linearly together.

Due to the characteristics of the first ratchet wheel 110, when the output shaft 130 of the driving motor rotates forward, the first outer wheel 111 of the first ratchet wheel 110 rotates and outputs rotational motion, and when the output shaft 130 rotates backward, the first outer wheel 111 does not rotate, on the other hand, the synchronous wheel system transmits the rotational motion of the output shaft 130 in the backward direction to the ball screw 140 structure, and further converts the rotational motion of the output shaft 130 in the backward direction to linear motion of the ball screw 140 structure. Because this application only needs a motor just can realize linear motion and the rotary motion of discontinuous operation and combines together, can realize rotary motion and linear motion's the separation of each other simultaneously according to the selection of difference, so the function is more, and the structure is also simpler, need not use a plurality of motors and control system, so the volume is also less, and economic cost is lower.

Referring to fig. 4, fig. 4 is a front view of the first ratchet mechanism. In one embodiment, the first ratchet mechanism further includes a first inner wheel 112, the first inner wheel 112 and the first outer wheel 111 are concentrically disposed, the first inner wheel 112 is fixedly connected to the output shaft 130, the first inner wheel 112 includes a plurality of first pawls 1121 circumferentially arranged at intervals and a first elastic member 1122 driving the first pawls 1121 to fit against the back of teeth of the first outer wheel 111, and the plurality of first pawls 1121 only can push the first outer wheel 111 to rotate with the forward rotation of the output shaft 130.

Referring to fig. 4, in one embodiment, the first ratchet wheel 110 rotates only with the forward rotation of the output shaft 130 through the first inner wheel 112, the first inner wheel 112 is disposed concentrically with the first outer wheel 111 of the first ratchet wheel 110, the first inner wheel 112 includes a plurality of first pawls 1121 circumferentially arranged at intervals and a first elastic member 1122 driving the first pawls 1121 to fit against the back of teeth of the first outer wheel 111, and the specific shape of the back of teeth of the first outer wheel 111 can be seen from fig. 4. When the first inner wheel 112 rotates in reverse about the output shaft 130, i.e., clockwise in the view of fig. 4, the first pawls 1121 slide along the back of the teeth, and the first outer wheel 111 does not rotate. By arranging the first pawls 1121 in the middle of the first outer wheel 111, the space for moving the structure can be saved, and meanwhile, by arranging three first pawls 1121, the stress on the structure can be more balanced.

Referring to fig. 2, in one embodiment, the synchronous wheel system is a second ratchet mechanism, the synchronous wheel is a second ratchet wheel 120, the second ratchet wheel 120 includes a second outer wheel 121, and the second outer wheel 121 can only rotate along with the reverse rotation of the output shaft 130.

Referring to fig. 2, in one embodiment, the synchronizing wheel system of the moving structure is a second ratchet mechanism, the synchronizing wheel is a second ratchet wheel 120, the second ratchet wheel 120 includes a second outer wheel 121, and the back of teeth of the second outer wheel 121 and the back of teeth of the first outer wheel 111 are arranged in a reverse direction, so that the second outer wheel 121 can only rotate along with the reverse rotation of the output shaft 130, and the first ratchet wheel 110 and the second ratchet wheel 120 cannot rotate simultaneously, which is more suitable for the specific requirements of the moxibustion system, and the linear movement and the rotational movement are separated.

Referring to fig. 5, fig. 5 is a schematic diagram of a second ratchet mechanism, in one embodiment, the second ratchet mechanism further includes a second inner wheel 122, the second inner wheel 122 is disposed concentrically with the second outer wheel 121, the second inner wheel 122 is fixedly connected to the output shaft 130, the second inner wheel 122 includes a plurality of second pawls 1221 circumferentially arranged at intervals and a second elastic member 1222 driving the second pawls 1221 to abut against the back of teeth of the second outer wheel 121, and the plurality of second pawls 1221 can only push the second outer wheel 121 to rotate with the reverse rotation of the output shaft 130.

Referring to fig. 5, in one embodiment, the second ratchet wheel 120 is realized to rotate only with the reverse rotation of the output shaft 130 through the second inner wheel 122, the second inner wheel 122 is arranged concentrically with the second outer wheel 121 of the second ratchet wheel 120, the second inner wheel 122 comprises a plurality of second pawls 1221 arranged at intervals along the circumferential surface and a second elastic member 1222 driving the second pawls 1221 to fit the back of teeth of the second outer wheel 121, and it can be seen from fig. 5 that the specific shape of the back of teeth of the second outer wheel 121 is such that when the second inner wheel 122 rotates reversely around the output shaft 130, i.e. clockwise rotation as viewed in fig. 5, the second pawls 1221 push on the back of teeth, and the surface of the back of teeth contacting the second pawls 1221 forms a small angle with the radial direction, so that the plurality of second pawls 1221 can only push the second outer wheel 121 to rotate with the forward rotation of the output shaft 130. When the second inner wheel 122 rotates in the forward direction about the output shaft 130, i.e., in the counterclockwise direction as viewed in fig. 5, the second pawls 1221 slide along the back of the teeth and the second outer wheel 121 does not rotate. By arranging the second pawls 1221 in the middle of the second outer wheel 121, space of a moving structure can be saved, and meanwhile, by arranging three second pawls 1221, stress of the structure can be more balanced.

Similarly, in another embodiment, the synchronous gear system may be a spur gear, and when a spur gear is used as the transmission member, the ball screw mechanism will output a reciprocating linear motion along with the rotation of the output shaft 130, i.e. the ball screw mechanism will move whether it rotates forward or backward.

Referring to fig. 2, in one embodiment, the output shaft 130 drives the lead screw 140 to rotate through the second ratchet 120, and the lead screw 140 or the nut 150 moves linearly.

Referring to fig. 2, in one embodiment, the screw 140 is fixedly connected to the second ratchet 120, and rotates with the reverse rotation of the output shaft 130, so that the nut 150 moves linearly without being fixed, and the screw 140 moves linearly while rotating while being fixed.

Similarly, in other embodiments, the nut 150 can be fixedly connected to the second ratchet 120 to achieve a rotational movement, and the lead screw 140 itself can move linearly.

Referring to fig. 1 to 3, in one embodiment, the portable electronic device further includes a housing 100, a lead screw 140 is rotatably connected to the housing 100, and the lead screw 140 can rotate relative to a nut 150 and move linearly relative to the nut 150.

Referring to fig. 1 to 3, in one embodiment, the moving structure further includes a housing 100, the lead screw 140 is rotatably connected to the housing 100 through a bearing, the lead screw 140 rotates relative to the nut 150 and linearly moves relative to the nut 150, and the housing 100 is configured to protect mechanical components from being damaged by external force, thereby improving the connection strength of the whole moving structure.

Referring to fig. 2, in one embodiment, the present invention further includes a third elastic element 160, one end of the third elastic element 160 is fixedly connected to the nut 150, and the other end is fixedly connected to the casing 100, and the third elastic element 160 is used for driving the casing 100 to move closer to the nut 150.

Referring to fig. 2, in one embodiment, the nut 150 is connected to the housing 100 through a third elastic member 160, the third elastic member 160 is a coil spring, when the screw 140 moves linearly, the distance between the nut 150 and the housing 100 is increased, the third elastic member 160 is also extended, when the screw 140 stops, the third elastic member 160 drives the screw 140 to move linearly in the opposite direction, so as to reset the ball screw mechanism, and when the screw 140 moves linearly in the opposite direction, the third elastic member 160 also rotates, so as to drive the second outer wheel 121 of the second ratchet wheel 120 to rotate, but the stationary state or the forward rotation state of the second inner wheel 122 and the output shaft 130 is not affected. The third elastic member 160 is provided to be engaged with the output shaft 130, so as to perform the reciprocating linear motion of the lead screw 140 for a long time.

Referring to fig. 2 and 3, in one embodiment, the fixing device further includes a fixing flange 170, a plurality of through slots are formed in the side wall of the housing 100, a plurality of protrusions of the fixing flange 170 protrude from the through slots in a one-to-one correspondence and are fixed to the outside, and the nut 150 is slidably connected to the housing 100 through the fixing flange 170.

It is understood that the nut 150 mentioned in the above embodiments is fixed to mean that the nut 150 is in a stationary state in comparison with a reference object which is stationary (relative to the earth) outside, and does not mean that the nut 150 is not movable, for example, if the whole housing 100 rotates while the screw 140 is in a linear motion, the motion state of the screw 140 is a vector motion of the linear motion plus the rotational motion, and at this time, the nut 150 is also rotating, so that the nut 150 is not in a stationary state in comparison with the reference object which is stationary outside, but if the rotational motion common to the nut 150 and the housing 100 is removed, the nut 150 is still considered to be in a stationary state relative to the housing 100 or the screw 140, so that the nut 150 mentioned above is fixed to be only in a linear motion relative to the housing 100, but not to any other motion.

Referring to fig. 2 and 3, in one embodiment, the sidewall of the housing 100 is provided with a plurality of through slots, the nut 150 is externally fixed by the fixing flange 170, the fixing flange 170 is provided with a plurality of protrusions, the plurality of protrusions extend out of the through slots in a one-to-one correspondence manner and are fixed with the outside, the fixing flange 170 is slidably connected with the housing 100, and the fixing flange 170 is provided to conveniently fix the nut 150.

The application also provides a moxibustion system, which comprises the moving structure in any one of the embodiments, and further comprises a sparrow pecking moxa stick and a rotating moxa stick, wherein the rotating moxa stick is fixedly connected with the first ratchet wheel 110 and rotates through the first ratchet wheel 110, and the sparrow pecking moxa stick is fixedly connected with the ball screw mechanism and moves linearly through the ball screw mechanism. Because moxibustion system has adopted motion structure, so can be automatic provide power, reduced the human cost.

It will be appreciated that the sparrow-pecking moxa roll may be attached to the nut 150, to the lead screw 140, or to the housing 100, depending on who moves linearly therein.

In one embodiment, a fixing frame (not shown) is further included, the fixing frame is fixedly connected with the nut 150 in the structure of the ball screw 140, the rotating moxa roll is positioned on one side of the fixing frame, and the sparrow pecking moxa roll is positioned on the other side of the fixing frame.

Preferably, in other embodiments, the fixing frame is provided with a steering head, the nut 150 or the flange is fixedly connected with the steering head, and the steering head can rotate to drive the whole movement structure to rotate, so that the sparrow pecking moxa roll and the rotating moxa roll can be rotated to better perform moxibustion.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent should be subject to the appended claims.

Claims (10)

1. A motion structure, comprising:

a drive motor including an output shaft (130) for outputting torque, the output shaft (130) being capable of forward and reverse rotation;

a first ratchet mechanism comprising a first ratchet wheel (110), the first ratchet wheel (110) being connected with the output shaft (130), a first outer wheel (111) of the first ratchet wheel (110) being rotatable only with the forward rotation of the output shaft (130);

a synchronous wheel system comprising at least one synchronous wheel, said synchronous wheel being coaxially connected with said output shaft (130), said synchronous wheel being rotatable with said reverse rotation of said output shaft (130);

the ball screw mechanism comprises a screw (140) and a nut (150), the nut (150) is sleeved on the screw (140), the screw (140) or the nut (150) is coaxially and fixedly connected with the synchronizing wheel, so that the screw (140) or the nut (150) rotates along with the synchronizing wheel, one of the screw (140) and the nut (150) is fixed in position along a first direction, the other moves along the first direction when the synchronizing wheel rotates, and the first direction is the length direction of the screw (140).

2. The exercise structure of claim 1, wherein the first ratchet mechanism further comprises a first inner wheel (112), the first inner wheel (112) being concentric with the first outer wheel (111), the first inner wheel (112) being fixedly connected to the output shaft (130), the first inner wheel (112) comprising a plurality of circumferentially spaced first pawls (1121) and a first resilient member (1122) driving the first pawls (1121) against the back of teeth of the first outer wheel (111), the plurality of first pawls (1121) being capable of rotating only the first outer wheel (111) in response to the forward rotation of the output shaft (130).

3. The movement structure according to claim 2, characterized in that the synchronizing wheel system is a second ratchet mechanism, the synchronizing wheel is a second ratchet wheel (120), the second ratchet wheel (120) comprises a second outer wheel (121), the second outer wheel (121) being only rotatable with the reverse rotation of the output shaft (130).

4. The movement structure according to claim 3, wherein the second ratchet mechanism further comprises a second inner wheel (122), the second inner wheel (122) is concentrically arranged with the second outer wheel (121), the second inner wheel (122) is fixedly connected with the output shaft (130), the second inner wheel (122) comprises a plurality of second pawls (1221) arranged at intervals along the circumferential surface and a second elastic member (1222) driving the second pawls (1221) to fit against the tooth back of the second outer wheel (121), and the plurality of second pawls (1221) can only push the second outer wheel (121) to rotate along with the reverse rotation of the output shaft (130).

5. The movement structure according to claim 4, wherein the output shaft (130) drives the lead screw (140) to rotate through the second ratchet (120), and the lead screw (140) or the nut (150) makes a linear movement.

6. The movement structure according to claim 5, further comprising a housing (100), wherein the lead screw (140) is rotatably connected with the housing (100), and the lead screw (140) can rotate relative to the nut (150) and can move linearly relative to the nut (150).

7. The exercise structure of claim 6, further comprising a third elastic member (160), wherein one end of the third elastic member (160) is fixedly connected to the nut (150), and the other end of the third elastic member (160) is fixedly connected to the housing (100), and the third elastic member (160) is used for driving the housing (100) to move closer to the nut (150).

8. The movement structure according to claim 7, further comprising a fixing flange (170), wherein the side wall of the housing (100) is provided with a plurality of through slots, a plurality of protrusions of the fixing flange (170) protrude from the through slots in a one-to-one correspondence and are fixed with the outside, and the nut (150) is slidably connected with the housing (100) through the fixing flange (170).

9. A moxibustion system comprising the moving structure of any one of claims 1-8, further comprising a sparrow-pecking moxa roll fixedly connected to the first ratchet (110) and rotationally moved by the first ratchet (110), and a rotating moxa roll fixedly connected to the ball screw mechanism and linearly moved by the ball screw mechanism.

10. The moxibustion system according to claim 9, further comprising a holder fixedly connected to the nut (140) of the ball screw mechanism, wherein the spinning moxa roll is located on one side of the holder, and the sparrow pecking moxa roll is located on the other side of the holder.

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