CN118001068A

CN118001068A - Operation support is used in otorhinolaryngology operation

Info

Publication number: CN118001068A
Application number: CN202410358252.5A
Authority: CN
Inventors: 金莹; 陈秋; 黄鑫
Original assignee: Affiliated Hospital of Guizhou Medical University
Current assignee: Affiliated Hospital of Guizhou Medical University
Priority date: 2024-03-27
Filing date: 2024-03-27
Publication date: 2024-05-10

Abstract

The invention discloses an operation support for ear-nose-throat operation, which relates to the technical field of medical appliances, and is characterized in that: the device comprises a bed body, a storage disc, a supporting structure, a longitudinal moving structure, a transverse moving structure and a height adjusting plate, wherein the storage disc is vertically connected to the top end of the height adjusting plate, the longitudinal moving structure is provided with a first clamping structure, and the height adjusting plate is provided with a second clamping structure. According to the invention, the position of the whole bracket is adjusted in multiple directions by arranging the longitudinal adjusting structure, the transverse adjusting structure and the height adjusting plate, so that the bracket can fix the position of a surgical instrument more conveniently and accurately, and a doctor can be better assisted in surgery; two groups of longitudinal adjusting structures are arranged, so that the longitudinal adjusting structure at the side required for starting can be selected according to the operation position of a patient, and unnecessary space occupation in the operation process is reduced; the setting of putting the thing dish can put the surgical instrument on putting the thing dish, and in whole support removal engineering, the surgical instrument follows the removal, is convenient for the doctor to take and put the thing.

Description

Operation support is used in otorhinolaryngology operation

Technical Field

The invention relates to the technical field of medical equipment, in particular to a surgical bracket for ear-nose-throat surgery.

Background

The types of otolaryngological operations are very numerous and generally fall into three categories, such as otologic operations including otitis media operations, middle ear tumor operations, hearing reconstructive operations, and surgical treatment of dizziness. There are also nasal surgery, including nasal structural orthoses, such as nasal septum deflection surgery, turbinate hypertrophy surgery, sinusitis surgery, and nasal cavity tumor surgery. There are also pharyngeal operations including tonsil operations, adenoid operations, and hypopharynx tumor operations, among others.

When carrying out ear-nose-throat operation, need use multiple apparatus, the scope operation time of complicacy is sometimes as long as several hours, and the long-time left hand mirror of main sword can cause the arm to be tingling in the left hand, and the scope is held between the fingers unstably, and the camera lens rocks, can all influence the accuracy of operation, not only brings huge working strength and burden for medical personnel, can also cause the influence to patient's aspect of treatment moreover.

Patent CN114344057B provides a surgical stand for ear, nose and throat operations, comprising a bed body for a patient to lie on, characterized in that the bed body is divided into a leg bearing section, a hip bearing section and a back bearing section corresponding to the legs, buttocks and back of the human body; the leg bearing section, the hip bearing section and the back bearing section are hinged with each other; the back bearing section is provided with a headrest for fixing the head of a patient on the surface, a chute is arranged on the side surface around the periphery of the headrest, the chute is communicated with the outside, a sliding block matched with the chute is arranged in the chute, an auxiliary bracket is arranged on the sliding block, and an operation auxiliary tool is arranged on the auxiliary bracket; a sliding block moving mechanism for moving the sliding block is arranged in the sliding groove, so that the problem of surgical error caused by assistance of multiple persons in the existing ear-nose-throat surgical process is solved.

However, the bracket disclosed in the above patent only has the function of fixing the surgical auxiliary tool, and is inconvenient because a new placement device needs to be newly added to other surgical instruments to be used; and this rack still is fixed in the bed body after using, inconvenient accomodate or dismouting can cause certain hindrance to postoperative operation bed clearance.

Disclosure of Invention

The invention aims to solve the problems and provide the surgical bracket for the ear-nose-throat surgery, the position of the whole bracket is adjusted in multiple directions by arranging the longitudinal adjusting structure, the transverse adjusting structure and the height adjusting plate, and the bracket can be contained at the bottom of a bed, so that the bracket can fix the position of a surgical instrument more conveniently and accurately, thereby better assisting a doctor in surgery; through setting up the thing dish of putting can put the surgical instruments on putting the thing dish, in whole support removal engineering, the surgical instruments follow the removal, be convenient for the doctor take and put the thing.

The technical aim of the invention is realized by the following technical scheme: the utility model provides an ear-nose-throat operation is with operation support, includes the bed body, puts thing dish, bearing structure, vertical movable structure, horizontal movable structure and altitude mixture control board, put thing dish perpendicular to high adjusting plate top, vertical movable structure is equipped with the card and ends structure one, the altitude mixture control board is equipped with the card and ends structure two;

the bed body comprises a bed board, and four support columns are arranged at the bottom of the bed board;

The supporting structure comprises a supporting rod, the supporting rod is fixedly connected to the side face of the storage disc, the supporting rod is connected with a U-shaped clamping plate, and the opening end of the clamping plate is movably connected with a fastening bolt in a penetrating manner;

The two groups of longitudinal moving structures with the same structure are symmetrically arranged at the bottom of the bed board, the longitudinal moving structure comprises two limit sliding blocks, the bed board is provided with a limit sliding groove for the limit sliding blocks to move, a motor I and a rotating shaft are arranged between the two limit sliding blocks, the motor I is fixedly connected with the limit sliding blocks, two ends of the rotating shaft are respectively and rotatably connected with the motor I and the other limit sliding block, two limit protrusions are symmetrically arranged on the rotating shaft, a lantern ring is sleeved on the rotating shaft in a sliding mode, an L-shaped connecting plate is fixedly connected with the lantern ring, and the height adjusting plate is sleeved on the connecting plate in a sliding mode;

The transverse moving structure comprises a motor II, a fixed ring is fixedly sleeved on the motor II, the fixed ring is fixedly connected to the bottom surface of the bed plate, a driving gear is connected to the motor II through a shaft, two driven gears are symmetrically arranged on two sides of the driving gear, the diameter of the driving gear is larger than that of the driven gears, the driving gear and the driven gears are meshed with chains, two screws are fixedly connected to two ends of the driven gears, threads of the screws are reversely arranged, bearings are rotatably connected to two ends of the screws, the bearings are fixedly connected to the bottom of the bed plate, and limiting sliding blocks are sleeved on the screws.

By adopting the technical scheme, when the bracket is not in use, the bracket is in a state of being stored at the bottom of the bed, so that the space occupation is reduced, and the operating bed can be cleaned and tidied conveniently; when in use, firstly, a patient lies on the bed, and the operation posture is adjusted; then the motor II is started to enable the transverse moving structure to work, the motor II drives the driving gear to rotate, the chain drives the two driven gears to rotate, the screw is further driven to rotate, and finally the limit sliding block is driven to move, so that the whole support is moved to the outer side of the bed body; after moving to the edge of the bed board, the motor I is started to drive the rotating shaft to rotate, and under the action of the limiting bulge, the connecting plate is driven by the lantern ring to rotate to the upper part of the bed board together with the height adjusting plate, the object placing disc and the supporting structure; according to the height of patient's back in bed, through the position of card structure two height-adjusting plate, again according to patient's operation position and bearing structure's distance, through card structure one start longitudinal movement structure, fixed regulating plate to suitable position, then put on hand required apparatus on putting the thing dish, can perform the operation, in-process of operation, can be fixed in on the bracing piece through grip block and fastening bolt with endoscope, auxiliary light source or struts etc. to reduce the input personnel quantity, be convenient for the doctor operation of main knife.

The invention is further provided with: the supporting rod is made of metal shaping pipes, and the clamping plate is made of elastic hard rubber.

By adopting the technical scheme, the position and the fixed angle of the surgical instrument can be conveniently adjusted by utilizing the metal fixed tube, so that efficient and convenient assistance is provided for the operation of doctors; the clamping plate is made of hard rubber, so that the friction force during clamping the surgical instrument can be increased, the surgical instrument is more stable and reliable, and the surgical instrument can be protected from being damaged under the condition of being clamped by strong force.

The invention is further provided with: the support rod is connected with one or more clamping plates.

By adopting the technical scheme, the number of the clamping plates can be set according to different operation requirements.

The invention is further provided with: the supporting rod is fixed on the side surface of the storage disc, which is far away from the height adjusting plate.

By adopting the technical scheme, as the doctor usually stands at two sides of the bed body to operate during operation, the supporting rods are arranged at the central position close to the bed body, so that the interference to the operation of the doctor can be avoided.

The invention is further provided with: the clamping structure I comprises a first bolt and a plurality of first jacks for the first bolt to be inserted, the first jacks are respectively arranged on two sides of the bed board, the first limiting cylinder is fixedly connected with the connecting plate, the first limiting cylinder is movably connected with the first limiting sleeve in the outer side, the first bolt sequentially penetrates through the first limiting cylinder and is inserted into the first jacks after the connecting plate, the height adjusting plate is provided with a notch for the first limiting sleeve and the first bolt to move, the first bolt and the first limiting sleeve are jointly connected with the first pulling plate, a first spring is arranged between the first bolt and the first limiting cylinder, and two ends of the first spring are respectively fixedly connected with the connecting plate and the first pulling plate.

The invention is further provided with: the second clamping structures are arranged in two groups and are symmetrically arranged on two sides of the height adjusting plate.

The invention is further provided with: the second clamping structure comprises a second bolt and a plurality of second jacks for the second bolt to be inserted, the second jacks are respectively arranged on two sides of the connecting plate, the second height adjusting plate is fixedly connected with a second limiting cylinder, the second limiting cylinder is movably connected with a second limiting sleeve, the second bolt sequentially penetrates through the second limiting cylinder and is inserted into the second jacks after passing through the second height adjusting plate, the second bolt and the second limiting sleeve are commonly connected with a second pulling plate, a second spring is arranged between the second bolt and the second limiting cylinder, and two ends of the second spring are respectively fixedly connected with the second height adjusting plate and the second pulling plate.

Through adopting above-mentioned technical scheme, when needs adjust bearing structure's longitudinal distance or vertical height, only need pulling arm-tie or arm-tie, make bolt one or bolt two break away from with jack one or jack two, can drive the connecting plate along the pivot and remove, perhaps drive high adjusting plate and remove along the connecting plate, after removing suitable position, bolt one corresponds with jack one, bolt two corresponds with jack two after, under the reset action of spring one and spring two, the automatic locking of completion in inserting jack one of bolt one, bolt two automatic insertion jack two, convenient high-efficient.

In summary, the invention has the following beneficial effects:

1. According to the invention, the position of the whole bracket is adjusted in multiple directions by arranging the longitudinal adjusting structure, the transverse adjusting structure and the height adjusting plate, so that the bracket can fix the position of a surgical instrument more conveniently and accurately, thereby better assisting a doctor in surgery; by arranging two groups of longitudinal adjusting structures, the longitudinal adjusting structure at the side required for starting can be selected according to the operation position of a patient, so that unnecessary space occupation in the operation process is reduced; the surgical instrument can be placed on the placement tray by arranging the placement tray, and the surgical instrument moves along with the placement tray in the whole bracket moving engineering, so that a doctor can take and place objects conveniently;

2. the invention utilizes the metal shaping tube, can conveniently adjust the position and the fixed angle of the surgical instrument, thereby providing high-efficiency and convenient assistance for the doctor to operate; the clamping plate is made of hard rubber, so that the friction force during clamping the surgical instrument can be increased, the surgical instrument is more stable and reliable, and the surgical instrument can be protected from being damaged under the condition of being clamped by strong force;

3. According to the invention, the first clamping structure and the second clamping structure are arranged to adjust the longitudinal position and the vertical position of the supporting structure, and the first bolt or the second bolt can be moved by pulling the first pulling plate or the second pulling plate to separate the first bolt or the second bolt from the first jack or the second jack; after moving to the suitable position, under the reset action of the first spring and the second spring, the first bolt is automatically inserted into the first jack to complete locking, the second bolt is automatically inserted into the second jack to automatically lock, and the device is simple in operation, convenient and efficient.

Drawings

FIG. 1 is a top view of a surgical stent in an embodiment of the present invention;

FIG. 2 is a front view of a surgical stand in accordance with an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a surgical stent A-A in an embodiment of the present invention;

FIG. 4 is a cross-sectional view of a surgical stent B-B in an embodiment of the present invention;

FIG. 5 is a process diagram of the surgical rack in the process of being received in the bed bottom according to the embodiment of the present invention;

FIG. 6 is a C-C cross-sectional view of a surgical stent in an embodiment of the present invention;

fig. 7 is a partial cross-sectional view of a second surgical bracket locking mechanism in accordance with an embodiment of the present invention.

In the figure: 1. a bed body; 11. a bed board; 12. a support column; 2. a storage tray; 3. a support structure; 31. a support rod; 32. a clamping plate; 33. a fastening bolt; 4. a longitudinally moving structure; 41. a limit sliding block; 42. a first motor; 43. a rotating shaft; 44. a limit protrusion; 45. a collar; 46. a connecting plate; 47. limiting sliding grooves; 5. a lateral movement structure; 51. a second motor; 52. a fixing ring; 53. a drive gear; 54. a driven gear; 55. a screw; 56. a chain; 57. a bearing; 6. a height adjusting plate; 7. a first clamping structure; 71. a first limiting cylinder; 72. a first limit sleeve; 73. a first bolt; 74. pulling a first plate; 75. a first spring; 76. a jack I; 77. a notch; 8. a second locking structure; 81. a second limiting cylinder; 82. a second limit sleeve; 83. a second bolt; 84. a second pulling plate; 85. a second spring; 86. and a second jack.

Detailed Description

In order that those skilled in the art will better understand the present invention, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings, wherein it is to be understood that the illustrated embodiments are merely exemplary of some, but not all, of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.

It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The present invention will be described in detail with reference to examples.

Examples:

As shown in fig. 1 to 7, the surgical stand for ear, nose and throat surgery comprises a bed body 1, a storage tray 2, a supporting structure 3, a longitudinal moving structure 4, a transverse moving structure 5 and a height adjusting plate 6, wherein the storage tray 2 is vertically connected to the top end of the height adjusting plate 6, the longitudinal moving structure 4 is provided with a first clamping structure 7, and the height adjusting plate 6 is provided with a second clamping structure 8;

the bed body 1 comprises a bed board 11, and four support columns 12 are arranged at the bottom of the bed board 11;

the supporting structure 3 comprises a supporting rod 31, the supporting rod 31 is fixed on the side surface of the object placing tray 2 far away from the height adjusting plate 6, the supporting rod 31 is connected with one or more U-shaped clamping plates 32, and the opening ends of the clamping plates 32 are movably connected with fastening bolts 33 in a penetrating way;

The bottom of the bed plate 11 is symmetrically provided with two groups of longitudinal moving structures 4 with the same structure, the longitudinal moving structures 4 comprise two limiting sliding blocks 41, the bed plate 11 is provided with limiting sliding grooves 47 for the limiting sliding blocks 41 to move, a motor I42 and a rotating shaft 43 are arranged between the two limiting sliding blocks 41, the motor I42 is fixedly connected with the limiting sliding blocks 41, two ends of the rotating shaft 43 are respectively and rotatably connected with the motor I42 and the other limiting sliding block 41, the rotating shaft 43 is symmetrically provided with two limiting protrusions 44, the rotating shaft 43 is in sliding sleeve joint with a lantern ring 45, the lantern ring 45 is fixedly connected with an L-shaped connecting plate 46, and the height adjusting plate 6 is in sliding sleeve joint with the connecting plate 46;

The transverse moving structure 5 comprises a motor II 51, a fixing ring 52 is fixedly sleeved on the motor II 51, the fixing ring 52 is fixedly connected to the bottom surface of the bed plate 11, a driving gear 53 is connected to the motor II 51 through a shaft, two driven gears 54 are symmetrically arranged on two sides of the driving gear 53, the diameter of the driving gear 53 is larger than that of the two driven gears 54, a chain 56 is meshed with the driving gear 53 and the two driven gears 54, two screw rods 55 are fixedly connected to two ends of the driven gears 54, threads of the two screw rods 55 are reversely arranged, bearings 57 are rotatably connected to two ends of the screw rods 55, the bearings 57 are fixedly connected to the bottom of the bed plate 11, a limit sliding block 41 is sleeved on a supporting rod 31 of the screw rods 55 and is made of metal fixed pipes, and a clamping plate 32 is made of elastic hard rubber;

The first clamping structure 7 comprises a first bolt 73 and a plurality of first jacks 76 for plugging the first bolt 73, the first jacks 76 are respectively arranged at two sides of the bed board 11, the connecting plate 46 is fixedly connected with a first limiting cylinder 71, the outer side of the first limiting cylinder 71 is movably connected with a first limiting sleeve 72, the first bolt 73 sequentially passes through the first limiting cylinder 71 and the connecting plate 46 and is plugged into the first jacks 76, the height adjusting plate 6 is provided with a notch 77 for moving the first limiting sleeve 72 and the first bolt 73, the first bolt 73 and the first limiting sleeve 72 are jointly connected with a first pull plate 74, a first spring 75 is arranged between the first bolt 73 and the first limiting cylinder 71, and two ends of the first spring 75 are respectively fixedly connected with the connecting plate 46 and the first pull plate 74;

The second clamping structure 8 is provided with two groups and is symmetrically arranged at two sides of the height adjusting plate 6; the second locking structure 8 comprises a second bolt 83 and a plurality of second jacks 86 for plugging the second bolt 83, the second jacks 86 are respectively arranged on two sides of the connecting plate 46, the second height adjusting plate 6 is fixedly connected with a second limit cylinder 81, the outer side of the second limit cylinder 81 is movably connected with a second limit sleeve 82, the second bolt 83 sequentially penetrates through the second limit cylinder 81 and the second height adjusting plate 6 and then is plugged into the second jacks 86, the second bolt 83 and the second limit sleeve 82 are jointly connected with a second pull plate 84, a second spring 85 is arranged between the second bolt 83 and the second limit cylinder 81, and two ends of the second spring 85 are respectively fixedly connected with the second height adjusting plate 6 and the second pull plate 84.

Working principle: when the bracket is not in use, the bracket is in a state of being stored at the bottom of the bed, so that the space occupation is reduced, and the operating bed can be cleaned and tidied conveniently; when in use, firstly, a patient lies on the bed, and the operation posture is adjusted; then the motor II 51 is started to enable the transverse moving structure 5 to work, the motor II 51 drives the driving gear 53 to rotate, the chain 56 drives the driven gears 54 to rotate, the screw 55 is further driven to rotate, and finally the limit sliding block 41 is driven to move, so that the whole support is moved to the outer side of the bed body 1; after moving to the edge of the bed plate 11, starting the motor I42 to drive the rotating shaft 43 to rotate, and under the action of the limiting protrusion 44, driving the connecting plate 46 through the lantern ring 45 to rotate to the upper part of the bed plate 11 together with the height adjusting plate 6, the object placing plate 2 and the supporting structure 3; according to patient's back that lies in bed, the position of high regulating plate 6 is adjusted through clamping structure two 8, according to patient's operation position and bearing structure 3's distance again, starts longitudinal movement structure 4 through clamping structure one 7, fixed regulating plate to suitable position, specifically does: pulling the pull plate one 74 or the pull plate two 84 to separate the first pin 73 or the second pin 83 from the first jack 76 or the second jack 86, so that the connecting plate 46 can be driven to move along the rotating shaft 43, or the height adjusting plate 6 can be driven to move along the connecting plate 46, after the connecting plate is moved to a proper position, the first pin 73 corresponds to the first jack 76, the second pin 83 corresponds to the second jack 86, and under the reset action of the first spring 75 and the second spring 85, the first pin 73 is automatically inserted into the first jack 76 to complete locking, and the second pin 83 is automatically inserted into the second jack 86 to automatically lock, so that the device is convenient and efficient;

Then the needed instruments on the hands are placed on the object placing disc 2, so that the operation can be performed, and in the operation process, an endoscope, an auxiliary light source or a spreader and the like can be fixed on the supporting rod 31 through the clamping plate 32 and the fastening bolts 33, thereby reducing the number of invested personnel and facilitating the operation of a doctor with a main knife.

The present embodiment is only for explanation of the present invention and is not to be construed as limiting the present invention, and modifications to the present embodiment, which may not creatively contribute to the present invention as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present invention.

Claims

1. An operation support for ear-nose-throat operation, which is characterized in that: the device comprises a bed body (1), a storage disc (2), a supporting structure (3), a longitudinal moving structure (4), a transverse moving structure (5) and a height adjusting plate (6), wherein the storage disc (2) is vertically connected to the top end of the height adjusting plate (6), the longitudinal moving structure (4) is provided with a first clamping structure (7), and the height adjusting plate (6) is provided with a second clamping structure (8);

the bed body (1) comprises a bed board (11), and four support columns (12) are arranged at the bottom of the bed board (11);

the supporting structure (3) comprises a supporting rod (31), the supporting rod (31) is fixedly connected to the side face of the storage disc (2), the supporting rod (31) is connected with a U-shaped clamping plate (32), and the opening end of the clamping plate (32) is movably connected with a fastening bolt (33) in a penetrating way;

The two groups of longitudinally moving structures (4) with the same structure are symmetrically arranged at the bottom of the bed plate (11), the longitudinally moving structures (4) comprise two limiting sliding blocks (41), the bed plate (11) is provided with limiting sliding grooves (47) for the limiting sliding blocks (41) to move, a motor I (42) and a rotating shaft (43) are arranged between the two limiting sliding blocks (41), the motor I (42) is fixedly connected with the limiting sliding blocks (41), two ends of the rotating shaft (43) are respectively and rotatably connected with the motor I (42) and the other limiting sliding block (41), the rotating shaft (43) is symmetrically provided with two limiting protrusions (44), the rotating shaft (43) is in sliding sleeve connection with a lantern ring (45), the lantern ring (45) is fixedly connected with an L-shaped connecting plate (46), and the height adjusting plate (6) is in sliding sleeve connection with the connecting plate (46);

The utility model provides a transverse moving structure (5) including motor two (51), fixed ring (52) have been cup jointed to motor two (51) are fixed, fixed ring (52) fixedly connected with in bed board (11) bottom surface, motor two (51) hub connection have driving gear (53), driving gear (53) bilateral symmetry is equipped with two driven gears (54), driving gear (53) diameter is than two driven gear (54) diameter is bigger, driving gear (53) and two driven gear (54) meshing has chain (56), driven gear (54) both ends equal fixedly connected with two screw rods (55), two the screw thread of screw rod (55) is reverse to be set up, screw rod (55) both ends swivelling joint has bearing (57), bearing (57) fixedly connected with in bed board (11) bottom, spacing slider (41) cup joint in screw rod (55).

2. The surgical stent for otorhinolaryngologic procedures as defined in claim 1 wherein: the supporting rod (31) is made of a metal fixed pipe, and the clamping plate (32) is made of elastic hard rubber.

3. The surgical stent for otorhinolaryngologic procedures as defined in claim 1 wherein: the support rod (31) is connected with one or more clamping plates (32).

4. The surgical stent for otorhinolaryngologic procedures as defined in claim 1 wherein: the supporting rod (31) is fixed on the side surface of the object placing disc (2) far away from the height adjusting plate (6).

5. The surgical stent for otorhinolaryngologic procedures as defined in claim 1 wherein: the first clamping structure (7) comprises a first bolt (73) and a plurality of first jacks (76) for the first bolt (73) to be inserted, the first jacks (76) are respectively arranged on two sides of the bed board (11), the first limiting cylinder (71) is fixedly connected with the connecting plate (46), the first limiting cylinder (71) is movably connected with the first limiting sleeve (72) outside, the first bolt (73) sequentially penetrates through the first limiting cylinder (71) and the connecting plate (46) and then is inserted into the first jacks (76), the height adjusting plate (6) is provided with a notch (77) for the first limiting sleeve (72) and the first bolt (73) to move, the first bolts (73) and the first limiting sleeve (72) are connected with the first pulling plate (74) together, a first spring (75) is arranged between the first bolts (73) and the first limiting cylinders (71), and two ends of the first spring (75) are respectively fixedly connected with the first connecting plate (46) and the first pulling plate (74).

6. The surgical stent for otorhinolaryngologic procedures as defined in claim 1 wherein: the second clamping structure (8) is provided with two groups and is symmetrically arranged on two sides of the height adjusting plate (6).

7. The surgical stent for otorhinolaryngological operations of claim 5 wherein: the second clamping structure (8) comprises a second bolt (83) and a plurality of second jacks (86) for plugging the second bolt (83), the second jacks (86) are respectively arranged on two sides of the connecting plate (46), the second limiting cylinder (81) is fixedly connected with the second height adjusting plate (6), the second limiting cylinder (81) is movably connected with the second limiting cylinder (82) outside, the second bolt (83) sequentially penetrates through the second limiting cylinder (81) and the second height adjusting plate (6) and then is plugged into the second jacks (86), the second bolt (83) and the second limiting cylinder (82) are jointly connected with the second pulling plate (84), the second bolt (83) and the second limiting cylinder (81) are respectively provided with the second spring (85), and two ends of the second spring (85) are respectively fixedly connected with the second height adjusting plate (6) and the second pulling plate (84).