阅读说明：本技术 一种运动关节制动器及摆转机构 (Motion joint brake and swing mechanism ) 是由 高俊杰 王光鑫 孟庆当 郁强 于 2021-08-18 设计创作，主要内容包括：本发明公开了一种运动关节制动器及摆转机构,包括：转轴；支撑部,在其内设有套设于所述转轴上的制动环；在所述支撑部上设有制动件和制动把手,所述制动把手与所述制动件之间通过离合结构配合连接,所述制动件与所述制动环配合实现所述制动环变形或放松,进而使得所述制动环与所述转轴抱紧或松开,以实现制动或解除制动。本发明采用双向抱紧制动,通过人工转动把手调节制动环和转轴之间的距离实现制动,并设有离合装置,可以保持运动关节制动或放松状态不变的同时调节把手至人体操作舒适的位置。(The invention discloses a motion joint brake and a swing mechanism, comprising: a rotating shaft; a support part, in which a brake ring sleeved on the rotating shaft is arranged; the braking part and the braking handle are arranged on the supporting part, the braking handle is connected with the braking part in a matched mode through a clutch structure, the braking part is matched with the braking ring to deform or relax the braking ring, and then the braking ring is tightly held or loosened with the rotating shaft to achieve braking or brake releasing. The invention adopts bidirectional holding brake, realizes brake by adjusting the distance between the brake ring and the rotating shaft through manually rotating the handle, and is provided with the clutch device, so that the handle can be adjusted to a position comfortable for human operation while keeping the brake or release state of the motion joint unchanged.)

1. A kinematic joint brake characterized by: the method comprises the following steps:

a rotating shaft;

a support part, in which a brake ring sleeved on the rotating shaft is arranged;

the braking part and the braking handle are arranged on the supporting part, the braking handle is connected with the braking part in a matched mode through a clutch structure, the braking part is matched with the braking ring to deform or relax the braking ring, and then the braking ring is tightly held or loosened with the rotating shaft to achieve braking or brake releasing.

2. The kinematic joint brake of claim 1, wherein: the brake ring comprises a holding contact surface which is in contact fit with the rotating shaft and an opening which is formed in the side, corresponding to the brake piece, of the holding contact surface; the braking piece is matched with the opening of the braking ring, the size of the opening is adjusted, and then the braking ring is deformed or loosened.

3. The kinematic joint brake of claim 2, wherein: the two ends of the opening of the brake ring extend outwards respectively to form ear parts, and the brake part is matched with the two ear parts respectively to realize the relative movement of the two parts, so that the size of the opening is adjusted.

4. The kinematic joint brake of claim 3, wherein: corresponding movement grooves are formed in the support portion in the movement direction of the ears, the braking pieces are installed in the movement grooves in a matched mode, and the two ears move relatively through the cooperation of the braking pieces and the ears.

5. The kinematic joint brake of claim 4, wherein: the number of the braking parts is two, the braking parts are respectively matched with the moving grooves in a threaded mode, and the tail end of each braking part abuts against one of the lug parts.

6. The kinematic joint brake of claim 4, wherein: screw holes parallel to the tangent line at the opening of the brake ring are formed in the two ear parts of the brake ring, and the thread directions of the screw holes on the two ear parts are opposite; the braking part is respectively matched and installed with the two ear parts of the braking ring through threads, and the braking part is rotated to drive the two ear parts of the braking ring to move relatively.

7. The kinematic joint brake of claim 6, wherein: the middle part of the braking part is provided with corresponding thread sections at positions corresponding to the two ears, and the braking part is respectively matched and installed with the two ears of the braking ring through the thread sections.

8. The kinematic joint brake of claim 7, wherein: two ears of the brake ring are nuts which are matched and installed on the brake piece and then fixedly connected with two ends of the opening of the brake ring.

9. The kinematic joint brake of claim 6, wherein: the braking parts are two rotating shafts which are respectively matched and installed in the moving grooves on the supporting part and are respectively matched and installed with the two lug parts of the braking ring;

the braking parts are sequentially provided with an optical axis matched with the moving groove, a threaded section matched with the screw hole of the lug part and a connecting section from outside to inside, and the two braking parts are fixedly connected through the connecting section in a matched mode.

10. The kinematic joint brake of claim 9, wherein: one of the braking parts is provided with a concave hole at the connecting section, and the connecting section is provided with a pin hole; a convex shaft correspondingly matched with the concave hole is arranged at the connecting section of the other braking piece, and a pin hole corresponding to the pin hole is formed in the convex shaft; the two braking parts are matched with the convex shaft through the concave hole and penetrate through the pin hole through the limiting pin to be limited and fixed, and synchronous rotation of the two braking parts is achieved.

11. The kinematic joint brake of claim 9, wherein: the diameter of the threaded section of the braking piece is smaller than that of the optical axis of the braking piece, a stop surface is formed between the optical axis and the threaded section, and the stop surface is matched with the outer end surface of the lug part.

12. The kinematic joint brake of claim 1, wherein: the matching end of the braking handle and the braking part is a hollow structure, a clutch gear female ring is fixedly installed in the hollow structure, and a clutch gear male ring correspondingly matched with the clutch gear female ring is arranged on the outer end face of the braking part;

the braking handle is sleeved on the braking part, and the clutch gear female ring and the clutch gear male ring are meshed and separated by adjusting the relative position of the braking handle and the braking part.

13. The kinematic joint brake of claim 12, wherein: the braking part is sleeved with a return spring, a check ring is arranged on the end face, facing the braking part, of the braking handle, and the check ring is matched with a male ring of a clutch gear of the braking part to compress the return spring.

14. The kinematic joint brake of claim 13, wherein: and a stop ring with the diameter larger than that of the return spring is arranged on the braking piece and positioned on the inner side of the male ring of the clutch gear, and the stop ring and the check ring are matched to compress the return spring.

15. The kinematic joint brake of claim 12, wherein: the outer side of the clutch gear female ring and the inner wall of the brake handle are both provided with threads, and the clutch gear female ring is axially fixed relative to the brake handle.

16. The kinematic joint brake of claim 12, wherein: the inside direction along the perpendicular to rotation axis of brake handle is provided with the fixed key, the separation and reunion gear female ring outside be provided with keyway complex, realize through the two cooperation the separation and reunion gear female ring for brake handle circumference is spacing.

17. The kinematic joint brake of claim 1, wherein: the rotating shaft is installed in the supporting seat through a bearing, and the supporting part is fixedly installed on the supporting seat.

18. The kinematic joint brake of claim 17, wherein: the tail end of the rotating shaft, which extends out of the supporting seat, is provided with threads, and a locking nut is arranged on the threads in a matched mode.

19. A swing mechanism is characterized in that: the brake comprises a traverse brake module and the motion joint brake as claimed in any one of claims 1 to 18, wherein the traverse brake module is fixedly mounted on a rotating shaft of the motion joint brake.

Technical Field

The invention relates to the field of mechanical structures, in particular to a motion joint brake and a swing mechanism.

Background

The C-shaped arm X-ray machine is applied to human organ perspective imaging, such as human spine imaging, cardiovascular imaging and the like, and comprises an X-ray generator, a beam limiter, a detector, imaging equipment and the like, wherein the X-ray generator and the detector are respectively fixed at two ends of a C-shaped arm. In the operation process, the C-shaped arm rotates around the human body, different positions of the human body are seen through and imaged, and therefore a doctor can conveniently detect and judge the position where a lesion occurs. Therefore, in order to adjust the position of the C-shaped arm relative to the human body and the operating table, the C-shaped arm needs to have joint degrees of freedom such as sliding, rotating, translating, swinging, lifting and the like. When a doctor looks through a two-dimensional image, the freedom degrees of all joints are adjusted manually, and the relative rotation of the freedom degrees of the joints is locked when the doctor looks through the two-dimensional image, so that the doctor looks through the two-dimensional image; when the joint freedom degree is locked, the relative rotation of the shaft and the hole is locked by adopting a friction braking method.

In the prior art, a scheme of unilateral deformation is adopted, and a friction brake ring is deformed on a single side by rotating a handle so as to tightly hold a rotating shaft. However, this solution requires a greater braking force for friction and does not lock sufficiently, with a smaller stroke (stroke ratio refers to the ratio of the amount of compression deformation applied to the angle of the handle rotation range at the same lead). Because the rotating shaft can not be locked completely in the braking process, after the rotating shaft is used for a long time, the braking is disabled, and the handle is adjusted again to realize the braking efficiency, the handle can not be in a position comfortable for manual operation.

Furthermore, since the friction brake ring not only plays a role of locking but also plays a role of damping, the friction brake ring is worn after being used for a long time, and the deformation of the friction brake ring needs to be adjusted. After the adjustment is completed, the initial position of the handle is no longer a comfortable position for the human hand to operate, and the initial position of the handle cannot be adjusted.

Disclosure of Invention

The purpose of the invention is as follows: the invention provides a motion joint brake and a swing mechanism aiming at the defects, the brake is realized by adopting bidirectional holding brake and adjusting the distance between a brake ring and a rotating shaft by manually rotating a handle, and the clutch device is arranged, so that the motion joint brake or the release state can be kept unchanged, and the handle can be adjusted to a position comfortable for human operation.

The technical scheme is as follows:

a kinematic joint brake comprising:

a rotating shaft;

a support part, in which a brake ring sleeved on the rotating shaft is arranged;

the braking part and the braking handle are arranged on the supporting part, the braking handle is connected with the braking part in a matched mode through a clutch structure, the braking part is matched with the braking ring to deform or relax the braking ring, and then the braking ring is tightly held or loosened with the rotating shaft to achieve braking or brake releasing.

The brake ring comprises a holding contact surface which is in contact fit with the rotating shaft and an opening which is formed in the side, corresponding to the brake piece, of the holding contact surface; the braking piece is matched with the opening of the braking ring, the size of the opening is adjusted, and then the braking ring is deformed or loosened.

The two ends of the opening of the brake ring extend outwards respectively to form ear parts, and the brake part is matched with the two ear parts respectively to realize the relative movement of the two parts, so that the size of the opening is adjusted.

Corresponding movement grooves are formed in the support portion in the movement direction of the ears, the braking pieces are installed in the movement grooves in a matched mode, and the two ears move relatively through the cooperation of the braking pieces and the ears.

The number of the braking parts is two, the braking parts are respectively matched with the moving grooves in a threaded mode, and the tail end of each braking part abuts against one of the lug parts.

Screw holes parallel to the tangent line at the opening of the brake ring are formed in the two ear parts of the brake ring, and the thread directions of the screw holes on the two ear parts are opposite; the braking part is respectively matched and installed with the two ear parts of the braking ring through threads, and the braking part is rotated to drive the two ear parts of the braking ring to move relatively.

The middle part of the braking part is provided with corresponding thread sections at positions corresponding to the two ears, and the braking part is respectively matched and installed with the two ears of the braking ring through the thread sections.

Two ears of the brake ring are nuts which are matched and installed on the brake piece and then fixedly connected with two ends of the opening of the brake ring.

The braking parts are two rotating shafts which are respectively matched and installed in the moving grooves on the supporting part and are respectively matched and installed with the two lug parts of the braking ring;

the braking parts are sequentially provided with an optical axis matched with the moving groove, a threaded section matched with the screw hole of the lug part and a connecting section from outside to inside, and the two braking parts are fixedly connected through the connecting section in a matched mode.

One of the braking parts is provided with a concave hole at the connecting section, and the connecting section is provided with a pin hole; a convex shaft correspondingly matched with the concave hole is arranged at the connecting section of the other braking piece, and a pin hole corresponding to the pin hole is formed in the convex shaft; the two braking parts are matched with the convex shaft through the concave hole and penetrate through the pin hole through the limiting pin to be limited and fixed, and synchronous rotation of the two braking parts is achieved.

The diameter of the threaded section of the braking piece is smaller than that of the optical axis of the braking piece, a stop surface is formed between the optical axis and the threaded section, and the stop surface is matched with the outer end surface of the lug part.

The matching end of the braking handle and the braking part is a hollow structure, a clutch gear female ring is fixedly installed in the hollow structure, and a clutch gear male ring correspondingly matched with the clutch gear female ring is arranged on the outer end face of the braking part;

the braking handle is sleeved on the braking part, and the clutch gear female ring and the clutch gear male ring are meshed and separated by adjusting the relative position of the braking handle and the braking part.

The braking part is sleeved with a return spring, a check ring is arranged on the end face, facing the braking part, of the braking handle, and the check ring is matched with a male ring of a clutch gear of the braking part to compress the return spring.

And a stop ring with the diameter larger than that of the return spring is arranged on the braking piece and positioned on the inner side of the male ring of the clutch gear, and the stop ring and the check ring are matched to compress the return spring.

The outer side of the clutch gear female ring and the inner wall of the brake handle are both provided with threads, and the clutch gear female ring is axially fixed relative to the brake handle.

The inside direction along the perpendicular to rotation axis of brake handle is provided with the fixed key, the separation and reunion gear female ring outside be provided with keyway complex, realize through the two cooperation the separation and reunion gear female ring for brake handle circumference is spacing.

The rotating shaft is installed in the supporting seat through a bearing, and the supporting part is fixedly installed on the supporting seat.

The tail end of the rotating shaft, which extends out of the supporting seat, is provided with threads, and a locking nut is arranged on the threads in a matched mode.

A swing mechanism comprises a transverse moving brake module and the motion joint brake, wherein the transverse moving brake module is fixedly arranged on a rotating shaft of the motion joint brake.

Has the advantages that:

1. compared with the existing unilateral deformation scheme, the bidirectional enclasping braking scheme adopted by the invention not only can realize effective enclasping between the friction braking ring and the rotating shaft so as to effectively realize braking, but also has the advantages that the friction braking ring is symmetrically deformed, and the stroke ratio is greatly improved on the basis of effective enclasping;

2. the invention adopts the cooperation of the clutch gear to separate the handle from the handle rotating shaft, can rotate the handle at will without driving the handle rotating shaft to rotate, thereby not changing the braking or loosening state, facilitating the adjustment of the hand to the position with comfortable operation, not only being convenient for operation during braking, but also effectively avoiding the embarrassment that the initial position of the handle is not the position with comfortable operation of the hand after the adjustment is finished during the braking adjustment.

Drawings

FIG. 1 is an overall block diagram of the present invention;

FIG. 2 is a longitudinal cross-sectional view of the overall structure of the present invention;

FIG. 3 is a transverse cross-sectional view of the overall structure of the present invention;

FIG. 4 is a cross-sectional view of the handle of the present invention;

FIG. 5 is a schematic view of a clutch gear female ring of the present invention;

FIG. 6 is a view showing a structural feature of a first handle rotating shaft according to the present invention;

FIG. 7 is a structural feature of a second handle rotation shaft of the present invention;

FIG. 8 is a structural feature view of the handle brake friction circle of the present invention;

FIG. 9 is a diagram of a usage scenario of the present invention;

FIG. 10 is a braking state diagram of the present invention;

FIG. 11 is a rear swing detent diagram of the present invention;

FIG. 12 is a view of the brake handle adjustment position of the present invention;

FIG. 13 is a cross-sectional view of the brake handle adjustment position of the present invention.

Wherein, 1, a brake handle, 2, a rotating shaft, 3, a handle support seat, 4, a support seat, 5, a support bearing, 6, a lock nut, 7, a friction brake ring, 701, a first lug part, 702, a second lug part, 703, a holding contact surface, 8, a first handle rotating shaft, 801, a first clutch gear male ring, 802, a first stop ring, 803, a first optical axis, 804, a first stop surface, 805, a first thread section, 806, a first pin hole, 807, a concave hole, 9, a second handle rotating shaft, 901, a second clutch gear male ring, 902, a second return spring stop ring, 903, a second optical axis, 904, a second stop surface, 905, a second thread surface, 906, a second pin hole, 907, a convex shaft, 10, a spring retainer ring, 11, a limit pin, 12, a return spring, 13, a clutch gear female ring, 1301, meshing teeth, 1302, a mounting thread, 1303, a mounting key way, 14, a mounting key way, A. the device comprises a motion joint brake, a transverse moving brake module and a lifting upright post.

Detailed Description

The invention is further elucidated with reference to the drawings and the embodiments.

Fig. 1 is an overall structural view of the present invention, and as shown in fig. 1, the motion joint brake a of the present invention includes a support base 4, a handle support base 3, a rotation shaft 2 and a brake handle 1, wherein the brake handle 1 is mounted on the handle support base 3, the support base 4 and the handle support base 3 are both hollow structures, the handle support base 3 is fixedly mounted on the support base 4 by a screw, and the rotation shaft 2 penetrates through the hollow structure of the handle support base 3 and is rotatably disposed in the support base 4.

In the invention, the rotating shaft can rotate around the axis of the rotating shaft, and a bearing, a shaft sleeve and other measures with small friction force can be arranged outside the rotating shaft.

As shown in fig. 2, the two ends of the hollow structure of the supporting seat 4 are provided with supporting bearings 5, the rotating shaft 2 passes through the hollow structure of the handle supporting seat 3 and is rotatably disposed in the supporting seat 4 through the supporting bearings 5, the end of the rotating shaft 2 extending out of the supporting seat 4 is provided with a thread, and a locking nut 6 is cooperatively disposed thereon for preventing the supporting bearing 5 from axially moving and adding extra pre-tightening force to the supporting bearing 5, and further, the locking nut 6 may be provided with an anti-rotation stop ring for limiting the relative rotation of the supporting bearing 5 and the locking nut 6. In the present invention, the support bearing 5 is a tapered roller bearing, and other deep groove ball bearings or orthogonal roller bearings may be used depending on the bearing capacity.

As shown in fig. 3, an accommodating groove perpendicular to the rotation shaft 2 is provided on the handle support base 3; a friction braking ring 7 is arranged in the hollow structure of the handle supporting seat 3, and the friction braking ring 7 is wound outside the rotating shaft 2; further, a boss is arranged at the lower part of the hollow structure of the handle supporting seat 3, the friction braking ring 7 is placed on the boss, the inner diameter of the boss is larger than the diameter of the rotating shaft 2, and the thickness of the friction braking ring 7 is larger than the gap formed between the boss and the rotating shaft 2; the friction brake ring 7 comprises a circular holding contact surface 703 contacting with the rotating shaft 2 and an adjusting opening arranged at the corresponding side of the friction brake ring 7 and the accommodating groove on the handle support seat 3, wherein a first lug part 701 and a second lug part 702 are respectively formed at two ends of the adjusting opening along the direction perpendicular to the accommodating groove in an extending manner, screw holes communicated with the accommodating groove in parallel are respectively arranged at the lug parts at the two ends, and the directions of internal threads of the lug parts at the two ends are opposite, as shown in fig. 8; the opening size is adjusted, so that the compression and expansion of the clasping contact surface 703 are adjusted, the friction force of the clasping contact surface 703 contacting with the rotating shaft 2 is adjusted, and the clasping or releasing of the friction brake ring 7 and the rotating shaft 2 is realized. In the present invention, an adjusting slot is provided at the middle of the receiving slot corresponding to the adjusting opening of the friction brake ring 7 for adjusting the first ear part 701 and the second ear part 702 of the friction brake ring 7 therein.

A first handle rotating shaft 8 and a second handle rotating shaft 9 are respectively arranged at two sides of the opening of the friction braking ring 7 in the accommodating groove on the handle supporting seat 3, wherein the outer ends of the first handle rotating shaft 8 and the second handle rotating shaft 9 are respectively matched and connected with the braking handle 1; as shown in fig. 4, one end of the brake handle 1 facing the accommodating groove is a hollow structure, and a clutch gear female ring 13 is fixedly installed in the hollow structure; a spring retainer ring 10 is arranged on the end face, facing the accommodating groove, of the brake handle 1, and a return spring 12 is further arranged between a clutch gear female ring 13 and the spring retainer ring 10 in a hollow mechanism of the brake handle 1.

In the invention, the clutch gear female ring 13 is fixedly installed in the hollow structure of the brake handle 1 through threads, specifically, matching threads are arranged at corresponding positions in the hollow structure of the brake handle 1, and the clutch gear female ring 13 is fixedly installed in the hollow structure of the brake handle 1 through the matching of the installation threads 1302 and the matching threads outside the clutch gear female ring; and a key groove 1303 is arranged on the outer wall of the clutch gear female ring 13, a fixed key is arranged at the position corresponding to the hollow structure of the brake handle 1, and the circumferential limit of the clutch gear female ring 13 and the brake handle 1 is realized through the matching of the key groove 1303 and the fixed key.

In the invention, the clutch gear female ring 13 can also be fixedly arranged in the hollow structure of the brake handle 1 by other press-fitting modes.

As shown in fig. 3, 6 and 7, the first handle rotating shaft 8 and the second handle rotating shaft 9 have similar structures, and the difference is only located at the connection position of the two ends, specifically, the structures of the first handle rotating shaft 8 and the second handle rotating shaft 9 from the outside to the inside are a clutch gear male ring, a stop ring, an optical axis, a thread section and a connection section in sequence, wherein the clutch gear male ring is matched with the clutch gear female ring 13, the number of teeth on the clutch gear female ring 13 is set according to actual requirements, the more the number of teeth are, and the more accurate the resolution position degree of the handle can be adjusted; the diameter of the stop ring is larger than that of the return spring 12, and the stop ring is used for being matched with the spring retainer ring 10 to compress the return spring 12; the thread direction of the thread sections of the first handle rotating shaft 8 and the second handle rotating shaft 9 corresponds to the thread direction of the first lug part 701 and the second lug part 702, and the thread sections are respectively matched with the first lug part 701 and the second lug part 702 for installation; the diameter of the threaded section is smaller than that of the optical axis, so that a stop surface is formed between the optical axis and the threaded section and is used for being matched with the outer end surface of the first lug part 701 or the second lug part 702;

a concave hole 807 is formed in the connecting section of the first handle rotating shaft 8, and a first pin hole 806 is formed in the connecting section; a convex shaft 907 which is correspondingly matched with the concave hole 807 of the first handle rotating shaft 8 is arranged at the connecting section of the second handle rotating shaft 9, a second pin hole 906 which is corresponding to the first pin hole 806 is formed in the convex shaft 907, the convex shaft 907 of the second handle rotating shaft 9 penetrates through the concave hole 807 of the first handle rotating shaft 8, and a limiting pin 11 sequentially penetrates through the first pin hole 806 and the second pin hole 906 to carry out limiting and fixing, so that the first handle rotating shaft 8 and the second handle rotating shaft 9 can synchronously rotate.

In the present invention, a movable groove is provided in the middle of the receiving groove, and both ear portions of the friction brake ring 7 are disposed in the movable groove.

In the invention, the brake handles 1 on two sides rotate simultaneously to compress inwards or release outwards to drive the two lug parts on the friction brake ring 7 to move inwards, so that the friction brake ring 7 is compressed to deform, the clasping contact surface 703 is reduced, the inner wall of the clasping contact surface is contacted with the rotating shaft 2 to clasp (or release) the rotating shaft, and the braking (or the braking release) is realized. After the two handle rotating shafts and the two lug parts of the friction braking ring 7 are matched and installed, inward pretightening force is applied to the friction braking ring 7, so that damping exists between the friction braking ring 7 and the rotating shaft 2, and the rotating shaft 2 can play a role in protection due to the damping effect when rotating.

In the invention, only one handle rotating shaft can be arranged, threaded sections with opposite thread directions are respectively arranged at the middle position of the handle rotating shaft and the corresponding positions at the two ends of the adjusting opening of the friction braking ring 7, nuts are respectively and correspondingly arranged at the symmetrical positions of the corresponding threaded sections, and the two nuts are arranged in the adjusting groove; two ends of an adjusting opening of the friction braking ring 7 are respectively and fixedly connected with corresponding nuts; the structure of the handle rotating shaft on two sides of the middle position of the handle rotating shaft is similar to that of the first handle rotating shaft 8 or the second handle rotating shaft 9, the structure is an optical axis, a stop ring and a clutch gear male ring in sequence, and the diameter of the thread section is smaller than that of the optical axis, so that a stop surface is formed between the optical axis and the thread section and is used for being matched with the outer end surface of the nut; the two ends of the handle rotating shaft are respectively connected with the brake handle 1 in a matching way.

In the invention, furthermore, two lug parts of the friction braking ring 7 can be set as sliding blocks which can symmetrically slide in the adjusting groove in the middle of the accommodating groove, and two ends of the adjusting opening of the friction braking ring 7 are respectively and fixedly connected with the corresponding sliding blocks; internal threads with opposite thread directions are respectively arranged on two sides of the adjusting groove in the accommodating groove, the first handle rotating shaft 8 and the second handle rotating shaft 9 are identical in structure and sequentially comprise a clutch gear male ring, a stop ring and a matching thread section from outside to inside, and the matching thread sections of the first handle rotating shaft 8 and the second handle rotating shaft 9 are respectively correspondingly matched with the internal threads on two sides of the accommodating groove; and when the brake handle 1 is matched and connected with the first handle rotating shaft 8 or the second handle rotating shaft 9, a certain distance is reserved between the inner end surface of the brake handle 1 and the side end surface of the handle supporting seat 3, and the distance is the adjusting distance of the sliding block of the friction brake ring 7.

The working principle of the invention is as follows:

when needs are braked, through rotating brake handle 1, brake handle 1 drives the handle rotation axis and rotates this moment to drive two ear relative motion of friction braking ring 7 through screw-thread fit, thereby realize holding the deformation of contact surface 703 and reduce, hold contact surface 703 and rotation axis 2 this moment and realize holding through frictional force, make rotation axis 2 be in under the state of braking, rotation axis 2 can't rotate. And the braking state can be released by rotating the brake handle 1 in the reverse direction.

When the brake is not needed or the brake handle 1 needs to be adjusted to a comfortable position operated by a human hand, the brake handle 1 moves outwards by applying a lateral force outwards along the axis direction of the handle rotating shaft, the return spring 12 is compressed, so that the clutch gear male ring and the clutch gear female ring 13 at the outer end of the handle rotating shaft are separated, the brake handle 1 can rotate freely at the moment and cannot drive the handle rotating shaft to rotate, and therefore the locking or loosening state of the swing brake module is not changed, and the brake handle 1 is adjusted to the comfortable position operated by the human hand. The lateral force in the axial direction of the handle rotating shaft is removed, at the moment, under the action of the restoring force of the restoring spring 12, the brake handle 1 moves inwards, and the clutch gear male ring and the clutch gear female ring 13 are in a meshed state again.

In addition, the invention can drive the handle rotating shaft to rotate by rotating the brake handle 1 after the friction brake ring 7 is worn, further adjust the deformation of the friction brake ring 7 to play a damping role again, and adjust the brake handle to a position with comfortable operation by the clutch on the brake handle after the adjustment is finished.

The invention also provides a swing mechanism, as shown in fig. 9, the swing mechanism of the invention is fixed on a lifting column C, and comprises the above-mentioned motion joint brake a, a rotating shaft 2 of the motion joint brake a is driven by a motor to rotate or is controlled to rotate manually, a traverse braking module B is carried on the rotating shaft 2, the traverse braking module B can swing around the axis of the rotating shaft 2, as shown in fig. 9, a braking handle 1 is in a horizontal position relative to the ground, at this time, the swing mechanism is in a braking state, and the traverse braking module B cannot swing around the axis of the rotating shaft 2.

As shown in FIG. 10, the brake handle 1 is in a position perpendicular to the ground, and the traverse brake module B is in a relaxed state and can swing about the rotation axis 2, and the traverse module is shown in a position of swinging clockwise by 10 degrees.

Fig. 11 shows that after the traverse brake module swings by 10 °, the brake handle rotates to a position horizontal to the ground, and the traverse brake module B is in a braking state again and cannot swing around the rotating shaft 2.

As shown in fig. 12 and 13, when a lateral force is applied in the axial direction of the handle rotation shaft, the clutch gear male ring and the clutch gear female ring 13 of the brake handle 1 are separated, and at this time, the brake handle 1 can be rotated freely without driving the handle rotation shaft to rotate, so that the locking or releasing state of the swing brake module is not changed, and the brake handle is adjusted to a comfortable position for manual operation. The lateral force in the axial direction is removed, and at the moment, under the action of the restoring force of the restoring spring, the clutch gear male ring and the clutch gear female ring 13 are in a meshed state again.

Although the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the details of the foregoing embodiments, and various equivalent changes (such as number, shape, position, etc.) may be made to the technical solution of the present invention within the technical spirit of the present invention, and these equivalent changes are all within the protection scope of the present invention.