CN116531717A - Crank mechanism, gait rehabilitation training device and limb training machine - Google Patents
Crank mechanism, gait rehabilitation training device and limb training machine Download PDFInfo
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- CN116531717A CN116531717A CN202310740463.0A CN202310740463A CN116531717A CN 116531717 A CN116531717 A CN 116531717A CN 202310740463 A CN202310740463 A CN 202310740463A CN 116531717 A CN116531717 A CN 116531717A
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- Prior art keywords
- crank
- piece
- connecting rod
- driving
- linkage mechanism
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- 230000007246 mechanism Effects 0.000 title claims abstract description 145
- 238000012549 training Methods 0.000 title claims abstract description 45
- 230000005021 gait Effects 0.000 title claims abstract description 14
- 230000033001 locomotion Effects 0.000 claims abstract description 23
- 230000001360 synchronised effect Effects 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 10
- 230000009977 dual effect Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B22/00—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements
- A63B22/06—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements with support elements performing a rotating cycling movement, i.e. a closed path movement
- A63B22/0605—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements with support elements performing a rotating cycling movement, i.e. a closed path movement performing a circular movement, e.g. ergometers
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- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B22/00—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements
- A63B22/06—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements with support elements performing a rotating cycling movement, i.e. a closed path movement
- A63B22/0605—Exercising apparatus specially adapted for conditioning the cardio-vascular system, for training agility or co-ordination of movements with support elements performing a rotating cycling movement, i.e. a closed path movement performing a circular movement, e.g. ergometers
- A63B2022/0611—Particular details or arrangement of cranks
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
Abstract
The invention relates to the technical field of sports rehabilitation and fitness, in particular to a crank mechanism, gait rehabilitation training equipment and a limb training machine, wherein the crank mechanism comprises a driving shaft; the crank piece is connected with the driving shaft; the sliding piece is arranged on the crank piece in a sliding manner, and the distance between the sliding piece and the driving shaft is adjustable; one end of the first connecting rod is hinged with the sliding piece; a first drive assembly, the first drive assembly comprising: the linkage mechanism is coaxially and rotatably arranged with the crank piece and is configured to convert the rotation of the linkage mechanism into the movement of the sliding piece along the radial direction of the driving shaft; the invention has the technical effect of automatically adjusting the working length of the crank when the equipment is not stopped.
Description
Technical Field
The invention relates to the technical field of rehabilitation and fitness, in particular to a crank mechanism, gait rehabilitation training equipment and a limb training machine.
Background
The crank mechanism is widely applied in the technical field of rehabilitation and fitness; different individuals need different personalized training requirements, and the motion trail, the amplitude and the like which can be changed are needed, so that an adjustable crank mechanism is not available at present;
the traditional crank mechanism is not strong in adjustability or cannot be adjusted, and even if the traditional crank mechanism can be adjusted, the traditional crank mechanism can only be adjusted manually, so that the automatic adjustment of the working length of the crank mechanism cannot be realized, on the one hand, the manual adjustment is troublesome, and on the other hand, especially in the use process of equipment with the crank mechanism, the working length of the crank must be adjusted due to the change of the use requirement, but the automatic adjustment of the working length of the crank cannot be performed, and the normal use rhythm of the equipment is interrupted.
Therefore, how to provide a crank mechanism with the working length of the crank capable of being automatically adjusted is a technical problem to be solved in the prior art.
Disclosure of Invention
In view of the above drawbacks of the prior art, the present invention aims to provide a crank mechanism, gait rehabilitation training device and limb training machine, so as to solve the technical problem that the working length of a crank of the existing crank mechanism cannot be automatically adjusted.
To achieve the above and other related objects, the present invention provides a crank mechanism comprising: a drive shaft;
a crank member connected to the drive shaft;
the sliding piece is arranged on the crank piece in a sliding manner, and the distance between the sliding piece and the driving shaft is adjustable;
a first connecting rod, one end of which is hinged with the sliding piece;
a first drive assembly, the first drive assembly comprising:
and the linkage mechanism is coaxially and rotatably arranged with the crank member and is configured to convert self rotation into movement of the sliding member along the radial direction of the driving shaft.
As one embodiment of the present invention, the first driving assembly further includes a limiting assembly, the limiting assembly is disposed between the linkage mechanism and the crank member, and the limiting assembly is configured to enable the linkage mechanism and the crank member to be switched between:
the first station is characterized in that the linkage mechanism and the crank piece keep a synchronous rotation state;
and the second station is characterized in that the linkage mechanism and the driving piece keep a relative rotation state.
As one embodiment of the present invention, the limiting assembly includes:
a first engagement portion;
the second clamping part is arranged on the crank piece, and the other clamping part is arranged on the linkage mechanism;
the second driving assembly is arranged on the linkage mechanism and is configured to drive the first clamping part to be close to or far away from the second clamping part to be separated from the clamping.
As one embodiment of the invention, the crank piece is provided with a first limit groove; the linkage mechanism is provided with a second limit groove;
one of the first limit groove and the second limit groove is an arc groove, the other is a straight groove, and the distance from one end to the other end of the two grooves to the driving shaft is gradually increased;
an intersection point is always arranged between the first limit groove and the second limit groove, and the sliding piece is located at the intersection point.
As one embodiment of the present invention, the linkage mechanism includes:
the first gear or worm gear is connected with the driving shaft, and the first limit groove is formed in the first gear or worm gear;
the first driving piece is in transmission connection with the first gear or the worm gear.
As one embodiment of the present invention, the crank member, the sliding member, the first connecting rod and the first driving assembly are all provided with two groups, and the two groups of crank members are in transmission connection with the same driving shaft.
As one embodiment of the present invention, the first engaging portion includes a rack, and is disposed on the crank member;
the second clamping part comprises a clamping piece which is movably arranged on the linkage mechanism and is connected with the second driving assembly; the clamping piece is configured to be capable of being close to the rack to be clamped with teeth on the rack or being far away from the rack to be separated from the clamping under the driving of the second driving assembly.
As one embodiment of the present invention, the second driving assembly includes:
the arc-shaped limiting blocks are radially arranged on the first gear or the worm gear in a sliding manner, are provided with a plurality of circular rings which are combined in a surrounding manner, and have gaps between adjacent arc-shaped limiting blocks;
the first reset piece is arranged on the circular ring and is configured to enable the circular ring with the reduced diameter to reset when the stress is smaller than a set force value;
the rope body is wound on the circular ring and is configured to be capable of being tightened or loosened to realize the adjustment of the diameter of the circular ring surrounded by the arc-shaped limiting blocks;
when the inner diameter of the circular ring is reduced, the clamping piece is extruded to enable the clamping piece to be disengaged from the rack, and the diameter of the circular ring is reset to enable the clamping piece to be engaged with the rack.
As one embodiment of the present invention, the second engaging portion includes:
the second reset piece is arranged at the clamping piece and is configured to enable the clamping piece to be clamped with the rack when the circular ring is reset;
the clamping piece one end is provided with the gyro wheel, and the other end is provided with the latch of tooth adaptation on the rack, the clamping piece middle part rotate set up in on the crank spare.
To achieve the above and other related objects, the present invention provides a gait rehabilitation training device, comprising the crank mechanism, further comprising:
the training part is arranged on the first connecting rod;
the moving piece is arranged at the other end of the first connecting rod;
and the guide piece is arranged below the moving piece and used for guiding the moving piece to move.
To achieve the above and other related objects, the present invention provides a limb training machine including the crank mechanism; further comprises:
one end of the second connecting rod is hinged with the other end of the first connecting rod;
the limb fixing mechanism is arranged on the second connecting rod or the first connecting rod;
the other end of the second connecting rod is movably arranged on the sliding rail.
To achieve the above and other related objects, the present invention also provides another limb training machine including the crank mechanism; further comprises:
one end of the third connecting rod is hinged with the other end of the first connecting rod;
a driving part;
one end of the fourth connecting rod is connected with the output end of the driving component, and the other end of the fourth connecting rod is hinged with the third connecting rod;
the training mechanism is arranged on the third connecting rod or the first connecting rod.
In summary, the crank member is driven to rotate by the driving shaft, so that the first connecting rod can perform crank connecting rod movement, and the sliding member can slide on the crank member to be adjustable by controlling the rotation speed relation of the linkage mechanism and the crank member, so that the distance between the sliding member and the driving shaft is adjusted, and the movement track of the first connecting rod of the crank mechanism is adjusted; the position of the sliding part on the crank part can be automatically adjusted through the first driving assembly, and the position of the sliding part does not need to be manually adjusted, so that the convenience of adjustment of the crank mechanism is improved; meanwhile, the first driving assembly can realize accurate adjustment of the position of the sliding piece, so that the crank mechanism can be applied to precise equipment, and the usability of the corresponding equipment is improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the main structure of the crank mechanism of the present invention;
FIG. 2 is a schematic diagram of the internal structure of the crank mechanism of the present invention;
FIG. 3 is an enlarged view of the structure at A of FIG. 2;
FIG. 4 is a diagram of another embodiment of the present invention with respect to FIG. 2;
FIG. 5 is a schematic diagram of the overall structure of the present invention;
FIG. 6 is a schematic diagram of the connection of the linkage mechanism and the slider according to the present invention;
FIG. 7 is a schematic view of a slider structure according to the present invention;
FIG. 8 is a schematic diagram of a crank construction of the present invention;
FIG. 9 is a schematic diagram of the overall structure of the dual crank structure of the present invention;
FIG. 10 is a schematic view of the internal structure of the dual crank structure of the present invention;
FIG. 11 is a schematic diagram of a dual crank arrangement of the present invention coupled to a dual output shaft drive motor;
FIG. 12 is a schematic diagram of a gait rehabilitation training device according to the present invention;
FIG. 13 is a schematic diagram of the configuration of the limb exercise machine of the present invention;
FIG. 14 is a schematic view of a configuration of another limb exercise machine according to the present invention;
description of element numbers: the drive shaft 1, the double-output shaft drive motor 11, the housing 12, the crank 2, the first limit groove 201, the slider 21, the first link 22, the training section 23, the moving section 231, the guide 24, the second link 25, the slide rail 26, the third link 27, the training mechanism 271, the driving member 28, the fourth link 29, the first driving unit 3, the link mechanism 31, the first gear 311, the second limit groove 3111, the circular groove 3112, the rope hole 3113, the first driving section 312, the drive motor 3121, the second gear 3122, the limit unit 32, the first engaging section 321, the rack 3211, the second engaging section 322, the second driving unit 323, the engaging section 3221, the second returning section 3222, the roller 3223, the circular ring 3231, the arc-shaped limit block 32311, the first returning section 3232, and the rope body 3233.
Detailed Description
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. It is also to be understood that the terminology used in the examples of the invention is for the purpose of describing particular embodiments only, and is not intended to limit the scope of the invention. The test methods in the following examples, in which specific conditions are not noted, are generally conducted under conventional conditions or under conditions recommended by the respective manufacturers.
Please refer to fig. 1 to 14. It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the invention to the extent that it can be practiced, since modifications, changes in the proportions, or adjustments of the sizes, which are otherwise, used in the practice of the invention, are included in the spirit and scope of the invention which is otherwise, without departing from the spirit or scope thereof. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the invention, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the invention may be practiced.
Where numerical ranges are provided in the examples, it is understood that unless otherwise stated herein, both endpoints of each numerical range and any number between the two endpoints are significant both in the numerical range. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs and to which this invention belongs, and any method, apparatus, or material of the prior art similar or equivalent to the methods, apparatus, or materials described in the examples of this invention may be used to practice the invention.
Referring to fig. 1-4, the present invention provides a crank mechanism comprising: a drive shaft 1; a crank member 2 fixedly connected to the drive shaft 1;
a sliding member 21 slidably disposed on the crank member 2 and having an adjustable distance from the driving shaft 1;
a first link 22 having one end hinged to the slider 21;
a first drive assembly 3, the first drive assembly 3 comprising:
a link mechanism 31 rotatably provided coaxially with the crank member 2, the link mechanism 31 being configured to be capable of converting rotation thereof into movement of the slider 21 in the radial direction of the drive shaft 1.
The driving shaft 1 is driven by a motor to rotate, the driving shaft 1 rotates to drive the crank member 2 to rotate, the crank member 2 is rod-shaped or circular, and the rotating crank member 2 drives the first connecting rod 22 to do crank connecting rod motion through the sliding member 21; the distance between the sliding part 21 and the rotation center of the crank part 2 is adjustable, so that the movement track of the first connecting rod 22 can be changed, and in a plurality of devices applying the crank mechanism, the movement track of the crank mechanism is adjustable, so that the device can be widely used in a wider application range and a wider application range; and the position of the sliding piece 21 on the crank piece 2 is adjustable, and the sliding piece is driven and adjusted by the first driving component 3;
when the first driving assembly 3 does not include the limiting assembly 32, the crank mechanism can also complete crank link motion, by controlling the relationship between the rotational speeds of the linkage mechanism 31 and the driving shaft 1, the radial distance from the sliding member 21 to the driving shaft 1 can be changed, if the rotational speeds of the crank member 2 and the linkage mechanism 31 are the same, the linkage mechanism 31 and the crank member 2 can be kept in a synchronous rotation state, the effective radius of gyration of the crank member 2 can be kept unchanged, and if the rotational speeds of the crank member 2 and the linkage mechanism 31 are different, the effective radius of gyration of the crank member 1 can be continuously or discontinuously changed.
As one embodiment of the present invention, the first driving assembly 3 further includes a limiting assembly 32, the limiting assembly 32 is disposed between the linkage mechanism 31 and the crank member 2, and the limiting assembly 32 is configured to enable the linkage mechanism 31 and the crank member 2 to be switched between:
the first station, the linkage mechanism 31 and the crank piece 2 keep a synchronous rotation state;
and the second station, the linkage mechanism 31 and the driving piece keep a relative rotation state.
It should be further noted that, the first driving assembly 3 further includes the limiting assembly 32, when the limiting assembly 32 switches the linkage 31 and the crank 2 to the second position, that is, when the linkage 31 and the crank 2 keep a relative rotation state, at this time, the linkage 31 itself drives rotation, when the linkage 31 with the center of rotation of the driving shaft 1 rotates, the linkage 31 can convert rotation of itself into movement of the sliding member 21 along the radial direction of the driving shaft 1, so that the distance between the sliding member 21 and the center of rotation of the crank 2 is adjustable, and when the distance between the sliding member 21 and the center of rotation of the crank 2 is adjusted, the limiting assembly 32 adjusts the linkage 31 and the crank 2 to the first position, so that it can be avoided that the linkage 31 and the crank 2 keep a relative rotation state to change the position of the sliding member 21 on the crank 2, and when the position of the sliding member 21 on the crank 2 needs to be continuously adjustable, the linkage 31 and the crank 2 do not need to be adjusted to the first position of the linkage 31 and the crank 2 by the limiting assembly 32;
the limiting component 32 enables the linkage mechanism 31 and the crank piece 2 to be switched between the first station and the second station, namely, in the first station state, the limiting component 32 controls the linkage mechanism 31 and the crank piece 2 to be in a connection state so as to keep synchronous rotation, in the second station state, the limiting component 32 controls the linkage mechanism 31 and the crank piece 2 to be in a disconnection state so that the linkage mechanism 31 and the limiting component 32 can be in a relative rotation state, and therefore, the limiting component 32 is arranged between the linkage mechanism 31 and the crank piece 2 so as to realize limiting or disconnection limiting between the linkage mechanism 31 and the crank piece 2; there are various ways of realizing the spacing or separating between the linkage mechanism 31 and the crank member 2, for example, an electric telescopic rod is arranged on the linkage mechanism 31, and a plurality of grooves are arranged on the crank member 2, so that the electric telescopic rod is extended and inserted into the grooves on the crank member 2, and the relative spacing between the linkage mechanism 31 and the crank member 2 can be realized; if an electromagnet is provided on the linkage mechanism 31 or the crank member 2, the linkage mechanism 31 or the crank member 2 can be switched between the synchronous rotation state and the relative rotation state by controlling the mutual attraction between the linkage mechanism 31 and the side surface of the crank member 2.
Referring to fig. 5, the crank mechanism further includes a frame, the driving shaft 1 is rotatably disposed on the frame, and the first driving assembly 3 is connected to the frame.
Referring to fig. 2-4, as one embodiment of the present invention, the limiting assembly 32 includes: a first engaging portion 321;
a second engaging portion 322, one of the first engaging portion 321 and the second engaging portion 322 is provided on the crank member 2, and the other is provided on the link mechanism 31;
the second driving unit 323 is provided on the linkage mechanism 31, and the second driving unit 323 is configured to be capable of driving the first engaging portion 321 and the second engaging portion 322 to approach to and separate from each other.
It should be noted that, in the first engaging portion 321 and the second engaging portion 322, one of them is disposed on the crank member 2, the other is disposed on the linkage mechanism 31, and the second driving component 323 drives the first engaging portion 321 to approach or depart from the second engaging portion 322, so that connection limit or disconnection limit between the linkage mechanism 31 and the crank member 2 can be achieved, and when the linkage mechanism 31 and the crank member 2 are in the connection limit state, the linkage mechanism 31 and the crank member 2 can be kept synchronously rotated, and when the linkage mechanism 31 and the crank member 2 are in the disconnection limit state, the linkage mechanism 31 and the crank member 2 can be kept in the relative rotation state, thereby realizing switching between the linkage mechanism 31 and the crank member 2 in the first station and the second station.
Referring to fig. 2-6, as one embodiment of the present invention, the crank member 2 is provided with a first limit groove 201; the linkage mechanism 31 is provided with a second limit groove 3111;
one of the first limit groove 201 and the second limit groove 3111 is an arc groove, the other is a straight groove, and the distance from one end to the other end of the two grooves to the driving shaft 1 is gradually increased;
an intersection point is always arranged between the first limit groove 201 and the second limit groove 3111, and the sliding piece 21 is located at the intersection point.
The crank member 2 has a disk-like shape, the link mechanism 31 also has a disk-like structure, and the arc-shaped groove and the straight groove are respectively provided on the disk-like crank member 2 and the disk-like structure of the link mechanism 31; one end of the arc-shaped groove and one end of the straight-shaped groove are close to the driving shaft 1, the other ends of the arc-shaped groove and the straight-shaped groove are far away from the driving shaft 1, an intersection point is formed between the arc-shaped groove and the straight-shaped groove all the time, so that the sliding piece 21 is convenient to install, when the linkage mechanism 31 rotates relative to the crank piece 2, the linkage mechanism 31 can drive the sliding piece 21 to slide on the crank piece 2, the distance between the sliding piece 21 on the crank piece 2 and the driving shaft 1 is adjusted, and the movement track of the first connecting rod 22 of the crank rocker mechanism is adjusted.
Referring to fig. 5-8, as an embodiment of the present disclosure, the first limiting groove 201 is an arc-shaped groove, and the second limiting groove 3111 is a straight groove.
Referring to fig. 4, as one embodiment of the present invention, the linkage mechanism 31 includes:
a first gear 311 connected to the driving shaft 1, wherein the first limit groove 201 is disposed on the first gear 311;
the first driving member 312 is in driving connection with the first gear 311.
It should be noted that, the first driving member 312 includes a driving motor 3121 and a second gear 3122, and the driving motor 3121 is disposed on the frame; the second gear 3122 is connected to the output shaft of the driving motor 3121, the driving motor 3121 drives the first gear 311 to rotate through the second gear 3122, so as to realize the driving rotation of the linkage mechanism 31, and when the linkage mechanism 31 rotates relative to the crank member 2, the first limit groove 201 on the first gear 311 will cooperate with the second limit groove 3111 on the crank member 2 to realize the position adjustment of the sliding member 21.
Referring to fig. 2, as one embodiment of the present invention, the linkage mechanism 31 includes:
a worm wheel connected to the drive shaft 1, the first limit groove 201 being provided on the worm wheel;
a first driving member 312 in driving connection with the first gear 311;
the first driving member 312 includes a driving motor 3121 and a worm, the worm is connected with an output shaft of the driving motor 3121, the driving motor 3121 drives the worm wheel to rotate through the worm, so as to realize the driving rotation of the linkage mechanism 31, and when the linkage mechanism 31 rotates relative to the crank member 2, the first limit groove 201 on the worm wheel cooperates with the second limit groove 3111 on the crank member 2 to realize the position adjustment of the sliding member 21; the worm gear is a non-self-locking worm gear.
Referring to fig. 9-11, as one embodiment of the present invention, the crank member 2, the sliding member 21, the first connecting rod 22 and the first driving assembly 3 are provided with two groups, and the two groups of crank members 2 are in transmission connection with the same driving shaft 1.
It should be noted that, since the crank mechanism may need to drive the two first links 22 to perform the crank-link motion, two groups of crank members 2, sliding members 21, first links 22 and first driving components 3 are provided, and the two groups of crank mechanisms are provided on the side close to each other; the two groups of crank components 2 are driven by one driving shaft 1, so that the arrangement of the driving shaft 1 can be reduced, and the supply and use of two sets of crank mechanisms are realized; when the crank mechanism is used on gait rehabilitation training equipment, and a user uses two feet to perform rehabilitation training, the first connecting rods 22 for power output of the crank mechanism are arranged in two, so that the user can perform gait rehabilitation training conveniently.
Referring to fig. 9-11, as one embodiment of the present invention, the driving shaft 1 is driven by a dual output shaft driving motor 11.
The driving shaft 1 is driven to rotate by the double-output shaft driving motor 11, so that two sets of crank mechanisms can be driven, the power source is reduced, and the manufacturing cost is reduced.
Referring to fig. 1 to 4, as one embodiment of the present invention, the first engaging portion 321 includes a rack 3211 disposed on the crank member 2;
the second engaging portion 322 includes an engaging member 3221 movably disposed on the linkage mechanism 31, and the engaging member 3221 is connected to the second driving assembly 323; the engaging member 3221 is configured to be capable of being brought closer to the rack 3211 to engage with teeth on the rack 3211 or brought farther from the rack 3211 to disengage from the engagement under the drive of the second drive assembly 323.
The rack 3211 is arc-shaped; the second driving component 323 is a miniature electric telescopic rod, the miniature electric telescopic rod is arranged on the linkage mechanism 31, a guide sleeve is further arranged on the linkage mechanism 31, and the guide sleeve is used for guiding the elongated electric telescopic rod so as to reduce the rod piece deformation of the electric telescopic rod; the miniature electric telescopic rod is connected with the clamping piece 3221, the miniature electric telescopic rod stretches to enable the clamping piece 3221 to be clamped with teeth on the rack 3211, the miniature electric telescopic rod shortens to enable the clamping piece 3221 to be separated from the rack 3211, and further the crank piece 2 is clamped with or separated from the linkage mechanism 31.
Referring to fig. 1-4, as one embodiment of the present invention, the second driving assembly 323 includes:
the arc-shaped limiting blocks 32311 are radially arranged on the first gear 311 or the worm gear in a sliding manner, and are provided with a plurality of circular rings 3231 which are surrounded together, and gaps are reserved between adjacent arc-shaped limiting blocks 32311;
a first reset member 3232 disposed on the ring 3231, wherein the first reset member 3232 is configured to reset the reduced diameter ring 3231 when a force is applied to the ring 3231;
a rope 3233 wound around the circular ring 3231, and the rope 3233 is configured to be tightened or loosened to achieve adjustment of the diameter of the circular ring 3231 surrounded by the arc-shaped restriction blocks 32311;
when the inner diameter of the circular ring 3231 is reduced, the clamping piece 3221 is extruded to enable the clamping piece 3221 to be disengaged from the rack 3211, the circular ring 3231 is reset to enable the clamping piece 3221 to be meshed with the rack 3211, and the circular ring 3231 and the clamping piece 3221 are always contacted to ensure simultaneous movement;
it should be noted that, the first restoring member 3232 is a spring or elastic rubber disposed between adjacent arc-shaped limiting blocks 32311; the first gear 311 or the worm gear is provided with a circular groove 3112, the arc-shaped limiting block 32311 is arranged in the circular groove 3112, one side of the circular groove 3112 is provided with a rope hole 3113, and the rope hole 3113 is used for the rope body 3233 to pass through; the arc-shaped limiting block 32311 is provided with a rope groove for enabling the rope body 3233 to be sleeved on the circular ring 3231.
The motor is arranged beside the rope hole 3113, an output end of the motor is connected with an end of the rope body 3233, and the rope body 3233 can be controlled by winding or unwinding the rope body 3233 through rotation of the output end of the motor.
Referring to fig. 1 to 4, as one embodiment of the present invention, the second engaging portion 322 further includes:
a second return member 3222 provided at the engagement member 3221, the second return member 3222 being configured to enable the engagement member 3221 to engage with the rack 3211 when the ring 3231 is returned;
one end of the clamping piece 3221 is provided with a roller 3223, the other end is provided with a latch matched with the upper teeth of the rack 3211, and the middle part of the clamping piece 3221 is rotatably arranged on the crank 2.
Note that, the roller 3223 is attached to the inner wall of the circular ring 3231; the second return element 3222 is a coil spring, and the clamping element 3221 is rotatably arranged on the crank element 2 through a pin shaft;
when the station two state is switched to the station one state, the linkage mechanism 31 and the limiting assembly 32 perform the following actions: releasing the rope 3233 to enable the circular ring 3231 to reset under the action of the first reset piece 3232, enabling the inner diameter of the circular ring 3231 to be increased, enabling the circular ring 3231 to reduce or not to press one end of the clamping piece 3221 through the roller 3223, enabling the clamping piece 3221 to reset under the action of the second reset piece 3222, enabling clamping teeth on the clamping piece 3221 to be clamped with the rack 3211, and enabling the linkage mechanism 31 and the limiting assembly 32 to be switched from a station two state to a station one state, namely enabling the linkage mechanism 31 and the crank 2 to be in a synchronous rotation state;
when the state of the first station is switched to the state of the second station, the rope body 3233 is tightened, so that the inner diameter of the circular ring 3231 is reduced, the inner wall of the circular ring 3231 is abutted against the roller 3223 at one end of the clamping piece 3221, the other end of the clamping piece 3221 is tilted, the clamping piece 3221 is disengaged from the rack 3211, and the linkage mechanism 31 and the limiting assembly 32 are switched from the state of the first station to the state of the second station, namely, the linkage mechanism 31 is in a disconnected or clamped state with the crank piece 2, and the linkage mechanism 31 and the crank piece 2 are kept in a relative rotation state;
when the linkage mechanism 31 and the crank 2 keep a relative rotation state, the first driving piece 312 drives the first gear 311 to rotate, so that the movement of the sliding piece 21 on the crank 2 can be realized, the distance between the sliding piece 21 and the driving shaft 1 is adjusted, after the position of the sliding piece 21 is adjusted, the linkage mechanism 31 and the limiting assembly 32 are switched from the station two state to the station one state, and the position of the sliding piece 21 is not changed any more, thereby achieving the purpose of adjusting the movement track of the connecting rod of the crank rocker mechanism.
Further, in the present invention, the crank mechanism can be applied to two working modes, the first working mode is that the actual working length of the crank member 2 needs to be changed frequently, when the equipment of the crank mechanism is used, the rope 3233 is tightened first, and at this time, the clamping member 3221 is disengaged from the rack 3211, so that the first gear 311 is disengaged from the crank member 2, and the position of the sliding member 21 on the crank member 2 can be adjusted in real time by the linkage mechanism 31;
in the second operation mode, when the actual working length of the crank member 2 does not need to be changed frequently, the device using the crank mechanism firstly adjusts the sliding member 21 on the crank member 2 to a proper position before working, and then releases the rope 3233, and at the moment, the clamping member 3221 is clamped with the rack 3211, so that the first gear 311 and the crank member 2 keep synchronous motion, and the actual working length of the crank member 2 can be kept for a long time.
Referring to fig. 5, further, the crank mechanism further includes a housing 12, and the housing 12 encloses the first driving assembly 3.
Referring to fig. 12-13, a gait rehabilitation training device is also provided, which includes the crank mechanism.
As one embodiment of the present invention, the gait rehabilitation training device includes: a crank mechanism;
a training unit 23 provided on the first link 22;
a moving member 231 disposed at the other end of the first link 22;
and a guide 24 disposed below the moving member 231 for guiding the moving member 231 to move.
The training part 23 is a handle or a pedal, and is used for performing rehabilitation training on the upper arm or the lower arm when the user performs rehabilitation training; the moving member 231 is hinged to the end of the first link 22, and the moving member 231 is a slider or a roller or the moving member 231 and the first link 22 are integrally arranged; the guide piece 24 is fixed on the frame or the ground, and the guide piece 24 is a guide rod or a rail or a chute; when the linkage mechanism 31 and the crank member 2 are in the first station state, the driving shaft 1 rotates, the driving shaft 1 drives the crank member 2 to rotate, the crank member 2 drives the first link 22 to move through the sliding member 21, and the first link 22 moves and drives the moving member 231 to reciprocate on the guiding member 24, so that the training part 23 performs lifting movement of an elliptical track, and further the legs and feet of a user are in the same state as walking, and gait rehabilitation training of the user is realized.
When two pedals are provided, the relative position between one crank piece 2 and the other crank piece 2 is adjusted, so that one pedal is positioned at a relatively high position, and the other pedal is positioned at a relatively low position, thereby enabling the feet of a user to alternately lift and lower, and achieving the purpose of gait rehabilitation training.
Referring to fig. 13, the present invention further provides a limb training machine, including the crank mechanism; further comprises:
a second link 25 having one end hinged to the other end of the first link 22;
a limb fixation mechanism provided on the second link 25 or the first link 22;
the other end of the second link 25 is movably disposed on the slide rail 26.
The second connecting rod 25 is provided with a sliding block, the sliding block is hinged with the second connecting rod 25, and the sliding block is in sliding fit connection with the sliding rail 26; when the linkage mechanism 31 and the crank piece 2 are in the state of the first station, the driving shaft 1 rotates to drive the first connecting rod 22, the first connecting rod 22 drives the end part of the second connecting rod 25 to slide on the slide rail 26, so that the movement of the limb fixing mechanism is realized, the movement training of the limb on the limb fixing mechanism is realized, and the aim of limb training is fulfilled.
Referring to fig. 14, the present invention further provides another limb training machine, including the crank mechanism; further comprises:
a third link 27 having one end hinged to the other end of the first link 22;
a driving member 28;
a fourth link 29 having one end connected to an output end of the driving part 28 and the other end hinged to the third link 27;
the training mechanism 271 is provided on the third link 27 or the first link 22.
It should be noted that, the driving component 28 is a driving motor assembly or other devices capable of driving the fourth link 29 to rotate, the driving component 28 is directly or indirectly connected with the frame or the ground, and the driving component 28 is used for driving the fourth link 29 to rotate; the fourth connecting rod 29 is hinged with the middle part of the third connecting rod 27; when the driving member 28 is a driving motor, the driving member 28 is fixed on the frame or the ground through a hinge seat, and the driving member 28 is used for driving the fourth link 29 to rotate due to the difference of the height or the length of the limb of each trainer, so that the movement track of the training mechanism 271 can make the trainer more comfortable during training, and certainly, the driving member 28 can always drive the fourth link 29 to swing during training of the trainer, so as to improve the movement track range of the limb training.
In conclusion, the invention effectively overcomes some practical problems in the prior art, thereby having high utilization value and use significance.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (10)
1. A crank mechanism, comprising:
a drive shaft;
the crank piece is fixedly connected with the driving shaft;
the sliding piece is arranged on the crank piece in a sliding manner, and the distance between the sliding piece and the driving shaft is adjustable;
a first connecting rod, one end of which is hinged with the sliding piece;
a first drive assembly, the first drive assembly comprising:
and the linkage mechanism is coaxially and rotatably arranged with the crank member and is configured to convert self rotation into movement of the sliding member along the radial direction of the driving shaft.
2. The crank mechanism of claim 1, wherein the first drive assembly further comprises a limit assembly disposed between the linkage and the crank member, the limit assembly configured to enable the linkage and the crank member to be switched between:
the first station is characterized in that the linkage mechanism and the crank piece keep a synchronous rotation state;
and the second station is characterized in that the linkage mechanism and the driving piece keep a relative rotation state.
3. The crank mechanism of claim 2, wherein the limit assembly comprises:
a first engagement portion;
the second clamping part is arranged on the crank piece, and the other clamping part is arranged on the linkage mechanism;
the second driving assembly is arranged on the linkage mechanism and is configured to drive the first clamping part to be close to or far away from the second clamping part to be separated from the clamping.
4. The crank mechanism of claim 1 wherein the crank member is provided with a first limit slot; the linkage mechanism is provided with a second limit groove;
one of the first limit groove and the second limit groove is an arc groove, the other is a straight groove, and the distance from one end to the other end of the two grooves to the driving shaft is gradually increased;
an intersection point is always arranged between the first limit groove and the second limit groove, and the sliding piece is located at the intersection point.
5. The crank mechanism of claim 4, wherein the linkage mechanism comprises:
the first gear or worm gear is connected with the driving shaft, and the first limit groove is formed in the first gear or worm gear;
the first driving piece is in transmission connection with the first gear or the worm gear.
6. A crank mechanism according to claim 3, wherein the first engagement portion comprises a rack arranged on the crank member;
the second clamping part comprises a clamping piece which is movably arranged on the linkage mechanism and is connected with the second driving assembly; the clamping piece is configured to be capable of being close to the rack to be clamped with teeth on the rack or being far away from the rack to be separated from the clamping under the driving of the second driving assembly.
7. The crank mechanism of claim 6, wherein the second drive assembly comprises:
the arc-shaped limiting blocks are radially arranged on the first gear or the worm gear in a sliding manner, are provided with a plurality of circular rings which are combined in a surrounding manner, and have gaps between adjacent arc-shaped limiting blocks;
the first reset piece is arranged on the circular ring and is configured to enable the circular ring with the reduced diameter to reset when the stress is smaller than a set force value;
the rope body is wound on the circular ring and is configured to be capable of being tightened or loosened to realize the adjustment of the diameter of the circular ring surrounded by the arc-shaped limiting blocks;
when the inner diameter of the circular ring is reduced, the clamping piece is extruded to enable the clamping piece to be disengaged from the rack, and the diameter of the circular ring is reset to enable the clamping piece to be engaged with the rack.
8. A gait rehabilitation training device comprising the crank mechanism of any one of claims 1-7, further comprising:
the training part is arranged on the first connecting rod;
the moving piece is arranged at the other end of the first connecting rod;
and the guide piece is arranged below the moving piece and used for guiding the moving piece to move.
9. A limb training machine comprising a crank mechanism as claimed in any one of claims 1 to 7; further comprises:
one end of the second connecting rod is hinged with the other end of the first connecting rod;
the limb fixing mechanism is arranged on the second connecting rod or the first connecting rod;
the other end of the second connecting rod is movably arranged on the sliding rail.
10. A limb training machine comprising a crank mechanism as claimed in any one of claims 1 to 7; further comprises:
one end of the third connecting rod is hinged with the other end of the first connecting rod;
a driving part;
one end of the fourth connecting rod is connected with the output end of the driving component, and the other end of the fourth connecting rod is hinged with the third connecting rod;
the training mechanism is arranged on the third connecting rod or the first connecting rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310740463.0A CN116531717A (en) | 2023-06-20 | 2023-06-20 | Crank mechanism, gait rehabilitation training device and limb training machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310740463.0A CN116531717A (en) | 2023-06-20 | 2023-06-20 | Crank mechanism, gait rehabilitation training device and limb training machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116531717A true CN116531717A (en) | 2023-08-04 |
Family
ID=87457994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310740463.0A Pending CN116531717A (en) | 2023-06-20 | 2023-06-20 | Crank mechanism, gait rehabilitation training device and limb training machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116531717A (en) |
-
2023
- 2023-06-20 CN CN202310740463.0A patent/CN116531717A/en active Pending
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