CN214388144U

CN214388144U - Elbow joint exoskeleton rehabilitation training robot

Info

Publication number: CN214388144U
Application number: CN202022980533.4U
Authority: CN
Inventors: 尤彦伟; 马新东; 方雯; 王帝之; 刘建秀; 张曜
Original assignee: Tsinghua University
Current assignee: Tsinghua University
Priority date: 2020-12-10
Filing date: 2020-12-10
Publication date: 2021-10-15
Anticipated expiration: 2030-12-10

Abstract

The utility model discloses an elbow joint exoskeleton rehabilitation training robot, which comprises a small arm exoskeleton, a large arm exoskeleton, a driving mechanism and a shoulder joint limiting protection mechanism, wherein the small arm exoskeleton and the large arm exoskeleton are respectively sleeved on the positions of a small arm and a large arm of an upper limb of a patient, and the small arm exoskeleton and the large arm exoskeleton are hinged and connected at the position corresponding to the elbow joint of the patient; the shoulder joint limiting and protecting mechanism is used for limiting the movement of a shoulder joint of a patient so as to keep an included angle between a large arm and a trunk of the patient unchanged in a sagittal plane, and can be detachably arranged at one end, close to the shoulder joint of the patient, of the large arm exoskeleton; the driving mechanism is used for driving the forearm exoskeleton to drive the forearm of the patient to bend and stretch around the elbow joint. The utility model discloses in the training of elbow joint ectoskeleton rehabilitation training robot of disclosing can be applied to elbow joint specially, therefore can reach the training effect that promotes patient's elbow joint motion function recovery.

Description

Elbow joint exoskeleton rehabilitation training robot

Technical Field

The utility model relates to a medical rehabilitation robot design production technical field, in particular to elbow joint ectoskeleton rehabilitation training robot.

Background

Rehabilitation training of patients through active and passive movement modes is a research hotspot of the existing sports medicine and rehabilitation medicine. The continuous development and maturity of medical robots and mechanical auxiliary exoskeleton technologies shape a brand new research direction of rehabilitation robots, the research in the field has great significance for the development of China, and the field of the rehabilitation robots has wide application prospects and development spaces along with the proposal of the planning outline of 'healthy China 2030'. Especially, the aging trend and the sports injury youth trend in our country are aggravated at present, and in order to face the serious challenge, more finely classified and functionally accurate rehabilitation robots are needed to be developed and put into use.

Cardiovascular and cerebrovascular diseases such as stroke and the like often cause dysfunction and abnormal movement of upper limbs. The upper limb/elbow joint exoskeleton rehabilitation training robot which is put into use in the market at present has fewer mature products, more representative upper limb rehabilitation training robots of ARMin series developed by Zurich university of Switzerland and Titan Arm upper limb auxiliary training systems driven by ratchet structures matched with rope traction in American Pennsylvania university, and the exoskeletal power is mostly concentrated on the shoulder joint, namely the upper limb rehabilitation, but only the shoulder joint can be rehabilitated to a certain extent, the elbow joint is often ignored and becomes a linkage part of the accessory movement of the shoulder joint, and the actual condition is that many patients with hemiplegia/abnormal behavior function, the elbow joint has lower freedom degree, the situation of motion function loss/joint stiffness is more serious, and the upper limb rehabilitation robot only taking the shoulder joint as the main driving joint cannot meet the use and rehabilitation requirements of patients with the elbow joint dysfunction.

Therefore, it is an urgent technical problem to be solved by those skilled in the art to provide an exoskeleton rehabilitation training robot specifically applied to elbow joints to improve the recovery effect of the elbow joint movement function of a patient.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention provides an exoskeleton rehabilitation training robot specially applied to elbow joints to improve the effect of recovering the elbow joint movement function of a patient.

In order to achieve the above object, the utility model provides a following technical scheme:

an elbow joint exoskeleton rehabilitation training robot comprises a small arm exoskeleton, a large arm exoskeleton, a driving mechanism and a shoulder joint limiting protection mechanism, wherein,

the small arm exoskeleton and the large arm exoskeleton are respectively sleeved at the positions of a small arm and a large arm of an upper limb of a patient, and the small arm exoskeleton and the large arm exoskeleton are hinged and connected at the position corresponding to the elbow joint of the patient;

the shoulder joint limiting and protecting mechanism is used for limiting the movement of a shoulder joint of a patient so as to keep an included angle between a big arm and a trunk of the patient unchanged in a sagittal plane, and the shoulder joint limiting and protecting mechanism can be detachably arranged at one end, close to the shoulder joint of the patient, of the big arm exoskeleton;

the driving mechanism is used for driving the forearm exoskeleton to drive the forearm of the patient to bend and stretch around the elbow joint.

Preferably, the forearm exoskeleton comprises a forearm arc-shaped support cover and a forearm constraint piece, the forearm arc-shaped support cover is used for contacting with the outer side of the forearm of a patient, two ends of the forearm constraint piece are respectively connected with two ends of the opening of the forearm arc-shaped support cover, and the forearm constraint piece is used for contacting with the inner side of the forearm of the patient and fixing the forearm of the patient in the forearm arc-shaped support cover.

Preferably, the big arm exoskeleton comprises a big arm arc-shaped support cover and a big arm binding piece, the big arm arc-shaped support cover is used for contacting with the outer side of the big arm of the patient, two ends of the big arm binding piece are respectively connected with two ends of the opening of the big arm arc-shaped support cover, and the big arm binding piece is used for contacting with the inner side of the big arm of the patient and fixing the big arm of the patient in the big arm arc-shaped support cover.

Preferably, the small arm binding piece and the large arm binding piece are both U-shaped binding belts, and the U-shaped binding belts are further provided with tightness adjusting mechanisms for adjusting binding force.

Preferably, the tightness adjusting mechanism is a hook and loop fastener.

Preferably, the forearm arc supports the cover and is close to the one end that big arm arc supported the cover is provided with the first forearm fixed plate and the second forearm fixed plate of mutual disposition, big arm arc supports the cover and is close to the one end that the forearm arc supported the cover is provided with the first big arm fixed plate and the big arm fixed plate of second mutual disposition, wherein, first forearm fixed plate with first big arm fixed plate is articulated, second forearm fixed plate with the big arm fixed plate of second is articulated.

Preferably, the driving mechanism comprises a driving wheel disc, a driven wheel disc, a driving motor and a driving wire, wherein,

a first wire groove is formed in the circumference of the driving wheel disc, the disc surface of the driving wheel disc is fixedly connected to the first small arm fixing plate, and the center of the driving wheel disc is rotatably connected to the first large arm fixing plate;

the disc surface of the driven wheel disc is fixedly connected to the second small arm fixing plate, and the center of the driven wheel disc is rotatably connected to the second large arm fixing plate;

the output end of the driving motor is connected with a wire wheel, a second wire groove is formed in the circumference of the wire wheel, and a closed driving ring formed after the driving wires are connected end to end is sleeved on the first wire groove and the second wire groove.

Preferably, the device further comprises a U-shaped transmission strip, and one end of the U-shaped transmission strip is connected with the driving wheel disc or the first small arm fixing plate; the other end of the U-shaped transmission strip is connected with the driven wheel disc or the second small arm fixing plate.

Preferably, an arc-shaped limiting groove is further formed in the disc surface of the driving wheel disc, and a limiting part matched with the arc-shaped limiting groove is further fixedly arranged on the first large arm fixing plate so as to limit the rotation angle of the small arm exoskeleton.

Preferably, an emergency braking bolt is further arranged on the disc surface of the driven wheel disc, and a plurality of braking holes used for being matched with the emergency braking bolt are further formed in the second large arm fixing plate.

Preferably, still include the back of the body case, be provided with the braces that supplies the patient to dress on the back of the body case, wherein, driving motor and line wheel all set up in the back of the body case.

Preferably, one end of the large-arm arc-shaped support cover close to the shoulder joint of the patient is provided with an arc-shaped base, one end of the back box close to the shoulder joint of the patient is provided with a strip-shaped base, the shoulder joint limiting and protecting mechanism comprises a first arc-shaped rod, a second arc-shaped rod, a third arc-shaped rod and a fourth arc-shaped rod, wherein,

the first end of the first arc-shaped rod and the first end of the second arc-shaped rod can be rotatably connected to the arched base; the first ends of the third arc-shaped rod and the fourth arc-shaped rod can be rotatably connected to the strip-shaped base; the second end of the first arc-shaped rod is hinged to the second end of the third arc-shaped rod through a vertical shaft, and the second end of the second arc-shaped rod is hinged to the second end of the fourth arc-shaped rod through a vertical shaft.

Preferably, a magnetorheological fluid damper, a coupler, a torque sensor and a rotary encoder are further arranged in the back box, wherein an output shaft of the driving motor is connected with the magnetorheological fluid damper, the magnetorheological fluid damper is connected with the coupler, the coupler is connected with the wire wheel, the torque sensor is arranged on the coupler, and the rotary encoder is arranged at the rear end of the driving motor and is connected with a rotating shaft of the driving motor.

Preferably, the back box further comprises an alarm device, a control module is arranged in the back box and is in communication connection with the driving motor, the torque sensor, the magnetorheological fluid damper and the rotary encoder, and when the torque measured by the torque sensor does not accord with the preset torque or the rotation angle measured by the rotary encoder does not accord with the preset angle, the control module controls the alarm device to alarm.

Preferably, a wire bundling frame arranged around two sides of the wire wheel is further arranged in the back box so as to restrain the driving wire in the wire bundling frame;

the below of bunch frame still is provided with the bunch flange, be provided with the confession on the bunch flange bunch hole that the drive wire passed.

Preferably, the driving wire is a Bowden wire, and an inner wire of the Bowden wire is matched with the driving wheel disc and the wire wheel; the position that is close to in the back of the body case the line wheel still is provided with and is used for adjusting the tight pulley that rises of interior line elasticity, wherein, the tight pulley that rises through round support slidable mounting in the back of the body case, just the back of the body case is close to the rigidity of round support is provided with an regulating plate, passes the regulating plate with the adjusting bolt of round support is used for adjusting round support with interval between the regulating plate.

The utility model discloses an elbow joint ectoskeleton rehabilitation training robot, increased shoulder joint spacing protection mechanism, shoulder joint spacing protection mechanism's effect lies in carrying out appropriate activity restriction to patient's shoulder joint to make the contained angle between patient's forearm and the truck keep unchangeable in the sagittal plane, when actuating mechanism drive forearm ectoskeleton drive patient's forearm around the elbow joint motion of bending, the partial degree of freedom of shoulder joint is restricted, this has effectively avoided the problem that the elbow joint takes part in compensation and reduces elbow joint training effect in the elbow joint training process; because the shoulder joint limiting protection mechanism is detachably arranged at one end, close to the shoulder joint of the patient, of the upper arm exoskeleton, in the later stage of rehabilitation training, the shoulder joint can be trained in a linkage mode by detaching the shoulder joint limiting protection mechanism, and the shoulder can be trained by using elbow to assist in multi-joint activities, so that the complete recovery of the function of the elbow joint is promoted, and the life quality of the patient is improved.

Therefore, the utility model discloses an elbow joint ectoskeleton rehabilitation training robot can be applied to elbow joint's training specially, therefore can reach the training effect that promotes patient's elbow joint motion function to resume.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an elbow joint exoskeleton rehabilitation training robot disclosed in an embodiment of the present invention;

fig. 2 is a schematic view of a matching structure of a driving wheel disc and a limiting member disclosed in the embodiment of the present invention;

FIG. 3 is a schematic diagram of the exploded structure of FIG. 2;

fig. 4 is a schematic structural view of a back box disclosed in an embodiment of the present invention;

FIG. 5 is a schematic view showing the internal structure of the back box of FIG. 4;

FIG. 6 is a schematic view of the structure of FIG. 5 at another angle;

fig. 7 is a schematic view of a patient wearing the elbow joint exoskeleton rehabilitation training robot disclosed in the embodiment of the present invention;

fig. 8 is a schematic view of a modular structure of the lower computer in the embodiment of the present invention;

fig. 9 is a schematic flow chart of the elbow joint exoskeleton rehabilitation training robot disclosed in the embodiment of the present invention during passive training;

fig. 10 is a schematic flow chart of the elbow joint exoskeleton rehabilitation training robot disclosed in the embodiment of the present invention during active training.

Wherein, 1 is a small arm arc support cover, 2 is a U-shaped constraint belt, 3 is a second small arm fixing plate, 4 is a driven wheel disc, 5 is a second large arm fixing plate, 6 is a strap, 7 is a back box, 8 is a heat dissipation hole, 9 is a large arm arc support cover, 10 is a driving line, 11 is a first large arm fixing plate, 12 is a driving wheel disc, 13 is a first small arm fixing plate, 14 is a limiting part, 15 is an arc limiting groove, 16 is a first wire groove, 17 is an end cap, 18 is a bearing, 19 is a mandrel, 20 is a switch, 21 is an alarm device, 22 is a wire wheel, 23 is a torque sensor, 24 is a rotary encoder, 25 is a driving motor, 26 is a magnetorheological fluid damper, 27 is a coupler, 28 is a wire bunching flange, 29 is a wire bunching frame, 30 is a U-shaped transmission bar, 31 is an arc base, 32 is a bar base, 33 is a first arc bar, 34 is a second arc bar, and 35 is a third arc bar, 36 is a fourth arc-shaped rod and 37 is a vertical shaft.

Detailed Description

The core of the utility model lies in providing an exoskeleton rehabilitation training robot specially applied to elbow joints to can improve the effect of the recovery of the elbow joint movement function of a patient.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Please refer to fig. 1 and 7, the elbow joint exoskeleton rehabilitation training robot disclosed in the present invention comprises a small arm exoskeleton, a large arm exoskeleton, a driving mechanism and a shoulder joint position limiting protection mechanism, wherein the small arm exoskeleton and the large arm exoskeleton are respectively used for being sleeved on the positions of a small arm and a large arm of an upper limb of a patient, and the small arm exoskeleton and the large arm exoskeleton are hinged to each other at a position corresponding to the elbow joint of the patient, so that the small arm exoskeleton can rotate relative to the large arm exoskeleton; the shoulder joint limiting and protecting mechanism is used for limiting the movement of a shoulder joint of a patient so as to keep an included angle between a large arm and a trunk of the patient unchanged in a sagittal plane, the shoulder joint limiting and protecting mechanism is detachably arranged at one end, close to the shoulder joint of the patient, of the large arm exoskeleton, and the driving mechanism is used for driving the small arm exoskeleton to drive the small arm of the patient to bend and stretch around the elbow joint.

The embodiment can show that the shoulder joint limiting and protecting mechanism has the function of limiting the movement of the shoulder joint of a patient, so that the included angle between the upper arm and the trunk of the patient is kept unchanged in the sagittal plane, when the driving mechanism drives the forearm exoskeleton to drive the lower arm of the patient to carry out flexion and extension motions around the elbow joint, the partial freedom degree of the shoulder joint is limited, and the problem that the elbow joint training effect is reduced due to compensation of the shoulder joint in the elbow joint training process is effectively avoided; because the shoulder joint limiting protection mechanism is detachably arranged at one end, close to the shoulder joint of the patient, of the upper arm exoskeleton, in the later stage of rehabilitation training, the shoulder joint can be trained in a linkage mode by detaching the shoulder joint limiting protection mechanism, and the shoulder can be trained by using elbow to assist in multi-joint activities, so that the complete recovery of the function of the elbow joint is promoted, and the life quality of the patient is improved.

It can be seen that the elbow joint exoskeleton rehabilitation training robot disclosed in the above embodiments can be specially applied to elbow joint training, so that it can achieve a training effect of promoting the rehabilitation of the elbow joint movement function of a patient.

It should be noted that, the stability and the functional flexibility of the shoulder joint should be paid attention to simultaneously while the elbow joint rehabilitation training, and the shoulder joint participation compensation means that the elbow joint of the patient can not be flexed to the normal joint moving range and compensated by actions such as shoulder shrugging, scapula lifting and the like, and the compensated movement of the shoulder joint can affect the elbow joint rehabilitation training; the shoulder joint limiting protection mechanism has the advantages that the patient does not compensate for the motion of the elbow joint through shoulder shrugging, shoulder blade over-moving and the like, the repeated change of the included angle between the large arm and the trunk of the patient also affects the difficulty of the motion of the elbow joint in the rehabilitation training process, and the function recovery of the elbow joint of the patient is not facilitated; it can be seen that the primary function of the shoulder joint position limiting protection mechanism is to limit the motion of the shoulder joint in the sagittal plane.

In one embodiment, the forearm exoskeleton specifically comprises a forearm arc-shaped support cover 1 and a forearm constraint piece, wherein the forearm arc-shaped support cover 1 is used for being in contact with the outer side of the forearm of a patient, two ends of the forearm constraint piece are respectively connected with two ends of an opening of the forearm arc-shaped support cover 1, and the forearm constraint piece is used for tightly binding the inner side of the forearm of the patient to fix the forearm of the patient in the forearm arc-shaped support cover 1; the big arm exoskeleton comprises a big arm arc support cover 9 and a big arm binding piece, the big arm arc support cover 9 is used for contacting with the outer side of the big arm of a patient, two ends of the big arm binding piece are respectively connected with two ends of the opening of the big arm arc support cover 9, and the big arm binding piece tightens the inner side of the big arm of the patient to fix the big arm of the patient in the big arm arc support cover 9.

The small arm binding piece and the large arm binding piece can adopt elastic binding belts commonly used in the existing medical apparatus, but the elastic binding belts are easy to obstruct the blood flow of the small arm and the large arm of a patient, therefore, the embodiment is further optimized, the small arm binding piece and the large arm binding piece are both U-shaped binding belts 2, and the U-shaped binding belts 2 have a certain radian, so that the U-shaped binding belts 2, the small arm arc-shaped supporting covers 1 and the large arm arc-shaped supporting covers 9 jointly form a cavity matched with the small arm and the large arm of the patient, the arm of the patient can extend into the cavity, of course, in order to properly adjust the tightness, the U-shaped binding belts 2 are also provided with tightness adjusting mechanisms for adjusting the binding force, the tightness adjusting mechanisms can be magic tape buckles commonly used, and can also be tightness buckles commonly used, the U-shaped binding belts 2 are arranged on the small arm arc-shaped supporting covers 1 and the large arm arc-shaped supporting covers 9, in this embodiment, two U-shaped restraining belts 2 are disposed on the small arm arc-shaped support cover 1 and the large arm arc-shaped support cover 9.

Preferably, the surfaces of the small arm arc-shaped support cover 1 and the large arm arc-shaped support cover 9, which are contacted with the skin of the patient, are made of bamboo charcoal fiber wear-resistant net surfaces with breathable mesh structures.

Considering that the elbow joint of a patient needs to give way when doing flexion and extension movement, and the hinged positions of the small arm exoskeleton and the large arm exoskeleton need to be designed with corresponding giving way structures to give way to the elbow joint of the patient, one possible mode is to arrange a bulge structure on the small arm arc-shaped support cover or the large arm arc-shaped support cover to give way, but the structure easily causes the elbow joint exoskeleton rehabilitation training robot to occupy a large space as a whole;

the scheme disclosed in this embodiment, forearm arc supports the one end that covers 1 is close to big arm arc and supports cover 9 and is provided with first forearm fixed plate 13 and second forearm fixed plate 3 of mutual disposition, big arm arc supports the one end that covers 9 is close to forearm arc and supports cover 1 and is provided with first big arm fixed plate 11 and the big arm fixed plate 5 of mutual disposition, first forearm fixed plate 13 links to each other with first big arm fixed plate 11 is articulated, second forearm fixed plate 3 links to each other with second big arm fixed plate 5 is articulated, as shown in fig. 1, the middle part forms a fretwork position after the connection of above-mentioned several fixed plates, this fretwork position just forms the space of stepping down that the elbow joint of patient steps down.

Certainly, the first small arm fixing plate 13 and the first large arm fixing plate 11, and the second small arm fixing plate 3 and the second large arm fixing plate 5 may also be indirectly hinged to each other, for example, in this embodiment, the driving mechanism includes a driving wheel disc 12, a driven wheel disc 4, a driving motor 25, and a driving wire 10, wherein a first wire slot is formed on the circumference of the driving wheel disc 12, the disc surface of the driving wheel disc 12 is fixedly connected to the first small arm fixing plate 13, and the center of the driving wheel disc 12 is rotatably connected to the first large arm fixing plate 11; the disc surface of the driven wheel disc 4 is fixedly connected to the second small arm fixing plate 3, the center of the driven wheel disc 4 is rotatably connected to the second large arm fixing plate 5, the output end of the driving motor 25 is provided with the wire wheel 22, a second wire groove is formed in the circumference of the wire wheel 22, a closed driving coil sleeve formed after the driving wire 10 is connected end to end is sleeved on the first wire groove and the second wire groove, the driving motor 25 can drive the driving wheel disc 12 to do reciprocating motion through the driving wire, and then the driving wheel disc 12 drives the small arm exoskeleton to do reciprocating motion around the large arm exoskeleton.

In the above embodiment, the first small arm fixing plate 13 and the first large arm fixing plate 11, and the second small arm fixing plate 3 and the second large arm fixing plate 5 are respectively and indirectly hinged to each other through the driving wheel disc 12 and the driven wheel disc 4, as can be understood with reference to fig. 3, the first large arm fixing plate 11 is provided with the mandrel 19, the inner ring of the bearing 18 is fixedly connected to the mandrel 19, the outer ring of the bearing 18 is fixedly connected to the driving wheel disc 12, in order to prevent the bearing 18 from falling off from the mandrel 19, the end of the mandrel 19 is further provided with the end cap 17, and the connection manner of the driven wheel disc 4 and the second large arm fixing plate 5 is understood with reference to the connection manner of the driving wheel disc 12 and the first large arm fixing plate 11.

The first small arm fixing plate 13, the second small arm fixing plate 3 and the small arm arc-shaped supporting cover 1 can be of an integrated structure or a split structure, and the embodiment of the utility model preferably adopts an integrated structure; the first large arm fixing plate 11, the second large arm fixing plate 5 and the small arm arc-shaped supporting cover 1 can be of an integrated structure or a split structure, the embodiment of the present invention is preferably an integrated structure, in order to ensure that the rotation of the small arm exoskeleton is within an allowable range and avoid injury to a patient, in the technical scheme disclosed in the embodiment, an arc-shaped limiting groove 15 is further provided on the disc surface of the driving disc 12, as shown in fig. 3, a limiting member 14 matched with the arc-shaped limiting groove 15 is fixedly provided on the first large arm fixing plate 11, and the matching of the limiting member 14 and the arc-shaped limiting groove 15 can limit the rotation angle of the small arm exoskeleton within a range of 0-90 °; furthermore, still be provided with an emergency braking bolt on the quotation of following driving wheel dish 4, still be provided with a plurality of braking holes that are used for with emergency braking bolt matched with on the big arm fixed plate 5 of second, when equipment or training mode broke down suddenly, medical staff or patient guardian can make emergency braking bolt insert in the braking hole fast to avoid the emergence of secondary damage.

Furthermore, the technical scheme disclosed in this embodiment is further provided with a U-shaped transmission strip, one end of the U-shaped transmission strip is connected with the driving wheel disc 12 or the first small arm fixing plate 13, the other end of the U-shaped transmission strip is connected with the driven wheel disc 4 or the second small arm fixing plate 3, and the U-shaped transmission strip can transmit the power of the driving wheel disc 12 to the driven wheel disc 4 or the second small arm fixing plate 3.

The person skilled in the art can understand that the form of the shoulder joint position-limiting protection mechanism is not limited to one, as long as the included angle between the forearm and the trunk of the patient can be kept constant in the sagittal plane, for example, the shoulder joint position-limiting protection mechanism can be a movable supporting leg matched with the forearm of the patient, the top of the supporting leg is provided with a supporting groove matched with the forearm of the patient, and the included angle between the forearm and the trunk of the patient can be kept constant in the sagittal plane through the supporting leg.

The elbow joint exoskeleton rehabilitation training robot disclosed in the embodiment further comprises a back box 7, as shown in fig. 1 and 4, a strap 6 worn by a patient is further arranged on the back box 7, the driving motor 25 and the reel 22 are both arranged in the back box 7, an arched base 31 is further arranged at one end of the upper arm arc-shaped supporting cover 9 close to the shoulder joint of the patient, a strip-shaped base 32 is arranged at one end of the back box 7 close to the shoulder joint of the patient, the shoulder joint position limiting protection mechanism comprises a first arc-shaped rod 33, a second arc-shaped rod 34, a third arc-shaped rod 35 and a fourth arc-shaped rod 36, wherein a first end of the first arc-shaped rod 33 and a first end of the second arc-shaped rod 34 are both rotatable and detachably connected to the arched base 31, first ends of the third arc-shaped rod 35 and the fourth arc-shaped rod 36 are both rotatable and detachably connected to the strip-shaped base 32, a second end of the first arc-shaped rod 33 is hinged to a second end of the third arc-shaped rod 35 through a vertical shaft, the second end of the second curved lever 34 is hinged to the second end of the fourth curved lever 36 via a vertical shaft 37.

The first curved bar 33, the second curved bar 34, the third curved bar 35 and the fourth curved bar 36 form a ball-like structure covering the lateral surface of the shoulder joint, and as shown in fig. 1 and 7, these four bars can realize relative rotation with friction force to allow the patient's forearm to move properly in the direction toward and away from the body, but at the same time, these four bars can keep the patient's forearm at a relatively fixed angle in the sagittal plane.

Of course, the drive motors 25 may be provided in the upper and lower arm exoskeletons, instead of the back box 7; in addition to driving the driving wire 10 by the driving motor 25, the driving mechanism can also drive the forearm exoskeleton to rotate by means of the driving motor 25 in combination with a gear mechanism.

Further, referring to fig. 5, a magnetorheological fluid damper 26, a coupler 27, a torque sensor 23 and a rotary encoder 24 are further disposed in the back box 7, an output shaft of the driving motor 25 is connected with the magnetorheological fluid damper 26, the magnetorheological fluid damper 26 is connected with the coupler 27, the coupler 27 is connected with the pulley 22, the torque sensor 23 is disposed on the coupler 27, and the rotary encoder 24 is disposed at the rear end of the driving motor 25 and connected with a rotating shaft of the driving motor 25.

The outer side of the rotary encoder 24 is further provided with a protective cover so as to assist in fixing the position of the rotary encoder 24, the rotary encoder 24 is connected with a rotating shaft of the driving motor 25 through a flexible connecting structure, the rotary encoder 24 is used for determining the rotating angle of the driving motor 25, in addition, the back box 7 is further provided with an alarm device 21 and a control module, the control module is in communication connection with the driving motor 25, the torque sensor 23, the magnetorheological fluid damper 26 and the rotary encoder 24, and when the torque measured by the torque sensor 23 does not accord with the preset torque or the rotating angle measured by the rotary encoder 24 does not accord with the preset angle, the control module controls the alarm device 21 to alarm.

After the magnetorheological fluid damper 26 is arranged, the elbow joint exoskeleton rehabilitation training robot can realize passive training (driven by a driving motor) of a patient and also can provide proper damping for the patient during active training of the patient.

As shown in fig. 4, a switch 20 for controlling the energization of the electrical equipment in the back box 7 is disposed on the top of the back box 7, and two heat dissipation grills are disposed behind the back box 7 for use as heat dissipation holes 8.

Referring to fig. 6, a wire harness frame 29 is further disposed in the back box 7 and surrounds both sides of the pulley 22, the wire harness frame 29 is used for restraining the driving wire 10 within the range of the wire harness frame 29, a wire harness flange is disposed at a lower portion of the wire harness frame 29, and a wire harness hole through which the driving wire 10 passes is disposed on the wire harness flange.

The driving wire 10 can be a common steel wire or a bowden wire, and the bowden wire has an outer skin, so that the inner line of the movement can be effectively prevented from causing accidental injury to a patient, and therefore, the driving wire 10 in the embodiment preferably adopts the bowden wire, and the inner line of the bowden wire is matched with the driving wheel disc 12 and the wire wheel 22; the position that is close to the line wheel 22 in the back of the body case 7 still is provided with the tight pulley that rises that is used for adjusting the interior line elasticity, and this tight pulley passes through a round support slidable mounting on the back of the body case 7, and the fixed position that is close to the round support of back of the body case 7 is provided with an regulating plate, and the adjusting bolt who passes regulating plate and round support is used for the interval between regulating wheel support and the regulating plate to the realization is to the regulation of interior line elasticity, drops in the interior line of preventing bowden line from following first wire casing and second wire casing.

When the elbow joint exoskeleton rehabilitation training robot is in actual use, the elbow joint exoskeleton rehabilitation training robot can be connected with an upper computer, the upper computer is preferably a computer of a remote terminal, the lower computer is a control module arranged on a back box 7, the control module is preferably an ARM chip, the computer gives instructions to the control module through a USB so as to control a driving system to drive an elbow joint of a patient to perform rehabilitation training, and meanwhile, the computer can display and store the real-time position and motion state of the elbow joint of the patient;

the lower computer control system adopts a modular design, as shown in fig. 8, the rotary encoder 24, the torque sensor 23, the magnetorheological fluid damper 26 and the driving motor 25 are controlled, data are acquired and fed back through a control module (an ARM chip), wherein the control module preferably adopts an NXP LPC series chip, and the lower computer control system has the advantages of large memory space, multiple peripheral interfaces and the like, and meets the design and requirements of rehabilitation training equipment.

Forearm arc supports cover 1 and big arm arc and supports cover 9 and adopt weak rigidity 3D to print light-duty material preparation, can laminate mutually by the body surface, and intensity is higher when the quality is light, and the whole weight of equipment is no longer than 5kg, is convenient for wear to take off, and it is also more comfortable to dress the experience simultaneously.

The magnetorheological fluid damper 26 is a disc-type magnetorheological fluid damper, and the damper functions as a passive force feedback device, and the damper has the principle that when a coil is not connected, the magnetic field intensity in a shell is zero, the magnetorheological fluid is expressed in a Newtonian fluid form, when the coil is connected with a circuit, the magnetic field intensity in the shell is gradually increased along with the increase of current, the magnetic viscosity of the magnetorheological fluid is gradually enhanced, the magnetorheological fluid is finally expressed in a solid state form after losing a liquid state, and the output torque of the magnetorheological fluid damper is correspondingly increased in the process. Thereby can change the magnetic field intensity of casing and adjust final output torque and can realize corresponding power change and force feedback when the patient uses this rehabilitation robot through the electric current of adjusting coil input.

Direct current torque motor is chooseed for use to driving motor 25, considers that the patient often is in the passive/initiative motion of low rate when carrying out elbow joint rehabilitation training, and probably appears the stagnant phenomenon of motion even because of the unusual circumstances such as muscle power is more weak or joint card pressure in recovered earlier stage, so the utility model discloses preferred model is NH48LYX series direct current torque driving motor, and this driving motor 25 can work under the condition of low rotational speed or locked rotor, need not to borrow speed reducer equipment such as gear reduction, and easily control, stability preferred, and can provide sufficient torque.

The rotary encoder 24 is preferably an incremental rotary encoder of the type E50S8, which counts output pulse signals according to the direction of rotation, converts mechanical quantities such as angular displacement and angular velocity of a shaft into corresponding electric pulses, and outputs the electric pulses as digital quantities.

The torque sensor 23 is preferably a static torque sensor for measuring output torque, sensor signals are converted and input to the ARM chip through A/D analog signals through the transmitter for processing, and calculation and analysis of the stress condition of the elbow joint of the patient in the rehabilitation process are facilitated by analyzing collected torque data and mechanical size data.

Considering the utility model provides an elbow joint exoskeleton rehabilitation training robot which is a training device worn on the body by a patient, so that the distribution of the weight of the mechanism and the reasonability of the contact part of the mechanism and the patient are key design problems, therefore, the utility model refers to the design of a mountain-climbing backpack load bearing system in the design, evenly distributes the weight of the mechanism on the trunk and the back, and keeps the stability of the gravity center of the mechanism; meanwhile, the elbow joint exoskeleton rehabilitation training robot provided by the utility model can adapt to the average body size (18-60 years old) of 10% -99% of the human body in GB/T10000-1988 Chinese adult human body size, can meet the use requirements of most groups, and has wide and good applicability.

The utility model discloses use the force feedback drive method that active/passive combined together, make magnetic current become liquid attenuator 26 and driving motor 25 cooperate, can provide two kinds of mode of initiative rehabilitation training and passive rehabilitation training simultaneously.

In the passive/power-assisted training mode, the driving motor 25 is used as an active actuator, the inner wire of the Bowden cable is tightened through the rotation of the driving motor 25 to drive the synchronous bending and stretching movement of the elbow joint, and when the training stopping time or the training stopping times are close, the magnetorheological fluid damper 24 is used for assisting the driving motor 25 to stop working by utilizing the overshoot mechanism of the driving motor 25, so that the rehabilitation training process of the elbow joint of the patient is more stable and safer.

Simultaneously the utility model discloses rotary encoder 24 and torque sensor 23 that set up can measure relevant kinematics and kinetic parameters at any time at the process of patient's rehabilitation training, can assess in real time the recovered effect, also are favorable to the later stage to carry out the rehabilitation evaluation to whole elbow joint function.

In the early stage of rehabilitation training, a patient can carry out training in sitting posture or other auxiliary standing positions on a wheelchair under the limit protection of the shoulder joint limit protection mechanism designed by the utility model, the activity of the shoulder joint is partially limited in the training mode, and the shoulder joint can be effectively prevented from participating compensation in the elbow joint training process so as to lead to training effect training; in the later stage of rehabilitation training, the linkage training of the shoulder-elbow joint can be carried out by disassembling the shoulder joint limiting protection mechanism.

As shown in fig. 9, after the data connection between the upper computer and the lower computer, the complete implementation steps of the passive rehabilitation training of the present invention are as follows:

the method comprises the following steps: the training is started, the system is initialized, the computer sends out instructions, the sensing (various sensors in the back box) and the control system are started, and the traction speed or traction tension of the rehabilitation training is set.

Step two: after the setting is confirmed to be correct, the rotary encoder 24 and the torque sensor 23 measure the angular speed of the motor shaft of the driving motor 25, the magnitude of the driving torque and the like in real time in the training process, and the control parameters are consistent with the preset values through increasing and decreasing the PWM duty ratio of the driving motor 25. If the error of the preset value exceeds a certain range (usually 10% is the maximum error range), the corresponding warning device 21 is started to give a warning prompt.

Step three: judging whether the patient reaches the end point set by the training, if not, continuing the training, and if so, continuing the loop step II and performing the next training; if the training is to be stopped temporarily, the computer system sends out a related stop instruction, stops the acquisition of signals and data processing, drives the motor 25 to brake and opens the magnetorheological fluid damper 26, and the training is stopped.

In the active/passive training mode, the magnetorheological fluid damper 26 realizes setting and adjustment of the resistance, and the magnetorheological fluid is used as a damping source, so that the magnetorheological fluid damper has the advantages of continuously adjustable resistance, rapid response and low energy consumption, and can gradually increase the damping for different muscle forces in different stages of rehabilitation training so as to achieve better rehabilitation effect.

As shown in fig. 10, after the data connection between the upper computer and the lower computer, the complete implementation steps of the active rehabilitation training of the present invention are as follows:

the method comprises the following steps: the training is started, the system is initialized, the computer system sends out an instruction, the sensing and control system is started, and the resistance output value of the magnetorheological fluid damper serving as the resistance source is set.

Step two: after the setting is confirmed to be correct, the torque sensor detects the resistance in real time in the training process, and the resistance is controlled to be consistent with a preset value through increasing and decreasing the input current of the magnetorheological fluid damper.

Step three: judging whether the patient reaches the end point set by the training, if not, continuing the training, and if so, continuing the loop step II and performing the next training; if the training damping is increased, returning to the step one, resetting the initial resistance value and then repeating the step two for training; if the training is to be stopped, the computer system sends out a related stop instruction, stops the acquisition of signals and the data processing, turns off the power supply, stops the current input to the magnetorheological fluid damper and terminates the training.

Compared with the prior art, the utility model discloses an elbow joint ectoskeleton rehabilitation training robot's advantage includes:

(1) the utility model discloses the setting of the spacing protection mechanism of well shoulder joint has been concerned about the detail problem that has shoulder joint compensation in traditional elbow joint rehabilitation training and has been solved. Meanwhile, the utility model adopts the driving structure driven by the driving wire, which can significantly reduce the volume of the driving structure and the end executing mechanism, and avoid the interference between mechanical components and the interference between the exoskeleton machinery and the human body; through the reasonable arrangement of the combined structure, the rotational inertia of the end effector is reduced, and the dynamic performance of the rehabilitation training robot is improved.

(2) The utility model discloses the nimble geometrical space that makes this rehabilitation training robot wholly occupy of arranging of well drive line is very little, can make drive assembly part and big arm ectoskeleton and forearm ectoskeleton part phase separation to make the part that the ectoskeleton is attached to on patient's elbow joint light as far as possible, can show the fatigue sense that reduces patient's limbs when long-time, multiunit number training.

(3) The utility model discloses the power transmission principle of the drive wire that relates to in is the same basically with the power transmission principle of human muscle, tendon, accords with current bionics's design trend, and the compact design of wearing formula structure can realize the activity freedom of other limbs except elbow joint of rehabilitation training, portable.

(4) The utility model discloses well drive method uses the force feedback drive method that active/passive combined together, cooperatees magnetorheological suspensions damper 26 and driving motor 25, can provide two kinds of rehabilitation training modes of initiative rehabilitation training and passive rehabilitation training simultaneously. The patient can adopt a passive (power-assisted) training mode in the early stage of rehabilitation due to the conditions of weak muscle strength, slow training speed, joint clamping pressure and the like even in the rehabilitation training; can carry out initiative (resistance) training mode along with the improvement of joint function, the recovery of muscle power in recovered middle and later stages, and because magnetorheological suspensions attenuator 26 can realize the quick continuous adjustment to the resistance size, the utility model discloses can satisfy the patient in the rehabilitation demand of different muscle power classification training in different periods, different stages of rehabilitation training, help the patient to realize better recovered effect through increasing the damping gradually in proper order.

(5) The utility model discloses well rotary encoder 24 and torque sensor 23's setting can measure relevant kinematics and kinetic parameters at any time at patient rehabilitation training's process, can carry out real-time aassessment to recovered effect, also is favorable to the later stage to carry out the rehabilitation evaluation to whole elbow joint function.

(6) The utility model discloses well ectoskeleton part as the robot main part adopts weak rigidity 3D to print light-duty material preparation, can laminate mutually with the body surface, and intensity is higher when the quality is light, and the whole weight of equipment is no longer than 5kg, is convenient for wear to take off, and it is also more comfortable to dress the experience simultaneously.

(7) The utility model discloses in still be provided with the tight pulley that rises that has the tensioning function as drive assembly's line wheel 22 next door, can guarantee that drive line 10 interior line keeps certain tension and can not the slippage with line wheel 22, make the system can last reliable operation longer time.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An elbow joint exoskeleton rehabilitation training robot is characterized by comprising a small arm exoskeleton, a large arm exoskeleton, a driving mechanism and a shoulder joint limiting protection mechanism, wherein,

2. The elbow joint exoskeleton rehabilitation training robot as claimed in claim 1, wherein the forearm exoskeleton comprises a forearm arc-shaped support cover (1) and a forearm constraint part, the forearm arc-shaped support cover (1) is used for contacting with the outer side of the forearm of the patient, two ends of the forearm constraint part are respectively connected with two ends of the opening of the forearm arc-shaped support cover (1), and the forearm constraint part is used for contacting with the inner side of the forearm of the patient and fixing the forearm of the patient in the forearm arc-shaped support cover (1);

the big arm exoskeleton comprises a big arm arc-shaped support cover (9) and a big arm binding piece, wherein the big arm arc-shaped support cover (9) is used for contacting with the outer side of a big arm of a patient, two ends of the big arm binding piece are respectively connected with two open ends of the big arm arc-shaped support cover (9), and the big arm binding piece is used for contacting with the inner side of the big arm of the patient and fixing the big arm of the patient in the big arm arc-shaped support cover (9).

3. The elbow joint exoskeleton rehabilitation training robot as claimed in claim 2, wherein one end of the small arm arc-shaped support cover (1) close to the large arm arc-shaped support cover (9) is provided with a first small arm fixing plate (13) and a second small arm fixing plate (3) which are oppositely arranged, one end of the large arm arc-shaped support cover (9) close to the small arm arc-shaped support cover (1) is provided with a first large arm fixing plate (11) and a second large arm fixing plate (5) which are oppositely arranged, wherein the first small arm fixing plate (13) is hinged with the first large arm fixing plate (11), and the second small arm fixing plate (3) is hinged with the second large arm fixing plate (5).

4. The elbow joint exoskeleton rehabilitation training robot as claimed in claim 3, wherein said drive mechanism comprises a driving wheel disk (12), a driven wheel disk (4), a drive motor (25) and a drive line (10),

a first wire groove is formed in the circumference of the driving wheel disc (12), the disc surface of the driving wheel disc is fixedly connected to the first small arm fixing plate (13), and the center of the driving wheel disc (12) is rotatably connected to the first large arm fixing plate (11);

the disc surface of the driven wheel disc (4) is fixedly connected to the second small arm fixing plate (3), and the center of the driven wheel disc (4) is rotatably connected to the second large arm fixing plate (5);

the output end of the driving motor (25) is connected with a wire wheel (22), a second wire groove is formed in the circumference of the wire wheel (22), and a closed driving ring formed after the driving wires (10) are connected end to end is sleeved on the first wire groove and the second wire groove.

5. The elbow joint exoskeleton rehabilitation training robot as claimed in claim 4, further comprising a U-shaped transmission bar (30), wherein one end of the U-shaped transmission bar (30) is connected with the active wheel disc (12) or the first forearm fixing plate (13); the other end of the U-shaped transmission strip (30) is connected with the driven wheel disc (4) or the second small arm fixing plate (3).

6. The elbow joint exoskeleton rehabilitation training robot as claimed in claim 4, wherein an arc-shaped limiting groove (15) is further arranged on the disc surface of the active wheel disc (12), and a limiting member (14) matched with the arc-shaped limiting groove (15) is further fixedly arranged on the first large arm fixing plate (11) so as to limit the rotation angle of the small arm exoskeleton;

an emergency braking bolt is further arranged on the disc surface of the driven wheel disc (4), and a plurality of braking holes matched with the emergency braking bolt are further formed in the second large arm fixing plate (5).

7. The elbow joint exoskeleton rehabilitation training robot as claimed in claim 4, further comprising a back box (7), wherein a strap (6) worn by a patient is arranged on the back box (7), wherein the driving motor (25) and the reel (22) are both arranged in the back box (7);

an arched base (31) is arranged at one end of the large-arm arc-shaped support cover (9) close to the shoulder joint of the patient, a strip-shaped base (32) is arranged at one end of the back box (7) close to the shoulder joint of the patient, the shoulder joint limiting and protecting mechanism comprises a first arc-shaped rod (33), a second arc-shaped rod (34), a third arc-shaped rod (35) and a fourth arc-shaped rod (36),

the first end of the first arc-shaped rod (33) and the first end of the second arc-shaped rod (34) can be rotatably connected to the arched base (31); the first ends of the third arc-shaped rod (35) and the fourth arc-shaped rod (36) can be rotatably connected to the strip-shaped base (32); the second end of the first arc-shaped rod (33) is hinged with the second end of the third arc-shaped rod (35) through a vertical shaft, and the second end of the second arc-shaped rod (34) is hinged with the second end of the fourth arc-shaped rod (36) through a vertical shaft (37).

8. The elbow joint exoskeleton rehabilitation training robot as claimed in claim 7, wherein a magnetorheological fluid damper (26), a coupler (27), a torque sensor (23) and a rotary encoder (24) are further arranged in the back box (7), wherein an output shaft of the driving motor (25) is connected with the magnetorheological fluid damper (26), the magnetorheological fluid damper (26) is connected with the coupler (27), the coupler (27) is connected with the pulley (22), the torque sensor (23) is arranged on the coupler (27), and the rotary encoder (24) is arranged at the rear end of the driving motor (25) and connected with a rotating shaft of the driving motor (25).

9. The elbow joint exoskeleton rehabilitation training robot as claimed in claim 8, wherein the back box (7) further comprises an alarm device (21), and a control module in communication connection with the driving motor (25), the torque sensor (23), the magnetorheological fluid damper (26) and the rotary encoder (24) is further arranged in the back box (7), and when the torque measured by the torque sensor (23) does not accord with a preset torque or the rotation angle measured by the rotary encoder (24) does not accord with a preset angle, the control module controls the alarm device (21) to alarm.

10. The elbow joint exoskeleton rehabilitation training robot as claimed in claim 7, wherein a wire bundling frame (29) is further arranged in the back box (7) and surrounds the wire wheel (22) so as to restrain the driving wire (10) in the wire bundling frame (29);

a wire harness flange (28) is further arranged below the wire harness frame (29), and a wire harness hole for the driving wire (10) to pass through is formed in the wire harness flange (28);

the driving wire (10) is a Bowden wire, and the inner wire of the Bowden wire is matched with the driving wheel disc (12) and the wire wheel (22); being close to in knapsack (7) the position of line wheel (22) still is provided with and is used for the adjustment the tight pulley that rises of interior line elasticity, wherein, the tight pulley that rises through round support slidable mounting in knapsack (7), just knapsack (7) are close to the rigidity of round support is provided with a regulating plate, passes the regulating plate with the adjusting bolt of round support is used for the adjustment round support with interval between the regulating plate.