A vertebral universal reducer for orthopedic spine surgery

Abstract

The present invention relates to the technical field of medical devices, and in particular to a vertebral universal reducer for orthopedic spinal surgery, comprising a servo motor, a translation block, a parallel block, a lifting screw, a fixing cylinder, a reduction mechanism, a threaded sleeve, a driven gear, a lifting motor, a driving gear, a C-shaped block and a fixing mechanism, wherein the translation block has a first thread groove, the parallel block has a translation groove, one end of the parallel block is provided with a translation motor, and the output end of the translation motor is provided with a translation screw. By setting the structure of the present design into an inverted L shape, the device as a whole can be fixed only on one side of a bed under the action of the fixing mechanism, thereby avoiding occupying too much space and facilitating surgical operations, and then controlling the lifting motor so that the reduction mechanism can be adjusted to a suitable height to be suitable for different groups of people, and at the same time, the servo motor can adjust the rotation angle of the reduction mechanism, thereby enabling the reduction mechanism to adapt to different fixing angles.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, and in particular to a vertebral universal repositioner used in orthopedic spine surgery. Background Art

[0002] Spinal deformity refers to the deviation of the coronal, sagittal or axial position of the spine from the normal position, resulting in morphological abnormalities, which is called spinal deformity. In this case, spinal surgery is required. The vertebral connections that deviate from the normal position are fixed by a vertebral universal reducer to facilitate surgical reduction of the patient. The vertebral universal reducer is a tool specially designed for orthopedic spinal surgery. The current vertebral reducer has poor adjustment performance and cannot be adjusted according to the different body shapes of patients. The scope of application is narrow. The patient will not be exactly in the middle of the operating table during surgery, resulting in a position deviation between the patient and the vertebral reducer. It is not convenient to move the patient during surgery, and it cannot be quickly fixed on the operating table, which can easily delay the patient's surgery time.

[0003] The prior art patent CN218589104U discloses a vertebral universal reducer for orthopedic spinal surgery, comprising two support plates and two connecting blocks, wherein the two support plates are respectively provided with fixing mechanisms, and screws are rotatably installed on the two support plates, and a mounting plate is fixedly installed on the outer wall of one side of the corresponding support plate, and a motor is fixedly installed on the top of the mounting plate, and the output shaft of the motor is fixedly connected to one end of the screw; the vertebral universal reducer for orthopedic spinal surgery is provided with a fixing mechanism, so that pulling the pull ring drives the moving rod to move downward, the sliding block squeezes the spring 2, and the C-shaped block is clamped on the edge of the operating bed, and the pull ring is released. The spring 2 releases the elastic force to push the sliding block, so that the moving rod drives the fixing block to fix the reducer on the edge of the operating bed, which is convenient for quickly fixing the reducer on the operating bed.

[0004] However, the overall shape of the above structure is in the state of a gantry, and the two C-shaped blocks are fixed on both sides of the bed, so that the two support plates occupy too much space, thereby making the surgical operation extremely inconvenient. Summary of the invention

[0005] The purpose of the present invention is to provide a vertebral universal reducer for orthopedic spinal surgery, so as to solve the technical problem in the prior art that the overall shape of the above-mentioned structure is in the state of a gantry, and two C-shaped blocks are fixed on both sides of the bed, resulting in the two support plates occupying too much space, thereby making the surgical operation extremely inconvenient.

[0006] To achieve the above-mentioned purpose, the present invention provides a vertebral universal reducer for orthopedic spinal surgery, comprising a servo motor, a translation block, a parallel block, a lifting screw and a fixed cylinder, wherein the output end of the servo motor is provided with a reset mechanism, the translation block has a first thread groove, the parallel block has a translation groove, one end of the parallel block is provided with a translation motor, the output end of the translation motor is provided with a translation screw, and the translation screw is located in the translation groove, one end of the fixed cylinder is sleeved with a threaded sleeve, the outer side of the threaded sleeve is provided with a driven gear, the outer side of the fixed cylinder is provided with a lifting motor, and the lifting screw is provided with a first thread groove, the first thread groove, the second ... A driving gear is provided at the output end of the lowering motor, and the driving gear is meshed with the driven gear. A C-shaped block is provided below the fixed cylinder, and a fixing mechanism is provided in the C-shaped block. The servo motor is provided at one end of the translation block. The translation block is slidably connected to the parallel block and is located in the translation groove, and the translation screw is threadedly connected to the parallel block and is located in the first thread groove. The parallel block is provided above the lifting screw, and the lifting screw is provided in the fixed cylinder, and the threaded sleeve is threadedly connected to the lifting screw and is sleeved on the outside of the lifting screw.

[0007] Among them, two lifting rods are arranged in the translation groove, and two lifting grooves are also arranged in the translation block, and the two lifting rods are respectively located in the corresponding lifting grooves.

[0008] Wherein, a polygonal rod is arranged in the fixing cylinder, a polygonal groove is arranged in the lifting screw rod, and the polygonal rod is located in the polygonal groove.

[0009] Among them, the reset mechanism includes two T-blocks, a bidirectional screw and a fixed seat, a reset clamp is arranged under the T-block, a T-slot is arranged in the fixed seat, a second thread groove is arranged in the T-block, the two T-blocks are respectively slidably connected to the fixed seat and are symmetrically arranged in the T-slot, the bidirectional screw is rotatably connected to the fixed seat and is located in the fixed seat, and the bidirectional screw is also threadedly connected to the corresponding T-block and is located in the second thread groove, the fixed seat is fixedly connected to the servo motor and is located at the output end of the servo motor.

[0010] Among them, the reset mechanism also includes a knob and two protective pads, a plurality of anti-slip protrusions are arranged on the outer side of the knob, the knob is fixedly connected to the bidirectional screw and is located at one end of the bidirectional screw, and the two protective pads are respectively bonded to the corresponding reset clamping blocks and are located on the inner side of the reset clamping blocks.

[0011] Among them, the fixing mechanism includes a fixed screw, a rotating sleeve and a protective box, one end of the fixed screw is provided with a supporting pad, one end of the rotating sleeve is provided with a secondary gear, the rotating sleeve has an internal thread, a main gear is provided in the protective box, and the volume of the main gear is multiple times that of the secondary gear, the rotating sleeve is rotatably connected to the C-shaped block through a bearing and is located in the C-shaped block, the rotating sleeve is also threadedly connected to the fixed screw and is sleeved on the outside of the fixed screw, and the supporting pad is located on the inner side of the C-shaped block, the protective box is fixedly connected to the C-shaped block and is located below the C-shaped block, the main gear is meshed with the secondary gear, is located on the outside of the secondary gear, and is also located in the protective box.

[0012] Among them, the fixing mechanism also includes a square block, an anti-rotation cylinder and a rotating disk. The anti-rotation cylinder has a square groove. The square block is fixedly connected to the fixing screw and is located below the fixing screw. The square block is also slidably connected to the anti-rotation cylinder and is located in the square groove. The anti-rotation cylinder is fixedly connected to the protective box and is located below the protective box. The rotating disk is fixedly connected to the main gear and is located on the main gear.

[0013] A vertebral universal reducer for orthopedic spine surgery of the present invention comprises a servo motor, a translation block, a parallel block, a lifting screw and a fixed cylinder, wherein a reset mechanism is arranged at the output end of the servo motor, a first thread groove is arranged in the translation block, a translation groove is arranged in the parallel block, a translation motor is arranged at one end of the parallel block, a translation screw is arranged at the output end of the translation motor, a thread sleeve is sleeved at one end of the fixed cylinder, a driven gear is arranged on the outside of the thread sleeve, a lifting motor is arranged on the outside of the fixed cylinder, a driving gear is arranged at the output end of the lifting motor, a C-shaped block is arranged below the fixed cylinder, a fixing mechanism is arranged in the C-shaped block, by setting the structure of the present design into an inverted L shape, the device as a whole can be fixed only on one side of the bed under the action of the fixing mechanism, thereby avoiding occupying too much space, and facilitating surgical operation, and then controlling the lifting motor so that the reset mechanism can be adjusted to a suitable height to be suitable for different people, and at the same time, the servo motor can adjust the rotation angle of the reset mechanism, so that the reset mechanism can adapt to different fixing angles. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0015] Figure 1 It is a three-dimensional stereogram of the first embodiment of the present invention.

[0016] Figure 2 It is a front view of the first embodiment of the present invention.

[0017] Figure 3 The present invention Figure 2 Section view along line AA.

[0018] Figure 4 The present invention Figure 2 Sectional view along line BB.

[0019] Figure 5 The present invention Figure 2 Sectional view along the CC line.

[0020] Figure 6 It is a front view of the second embodiment of the present invention.

[0021] Figure 7 The present invention Figure 6 Sectional view along line DD.

[0022] Figure 8 The present invention Figure 7 A partial enlarged view of point E in the middle.

[0023] Fig. 9 The present invention Figure 7 Cross-sectional view along line FF.

[0024] Fig.10 The present invention Figure 6 Sectional view along the GG line.

[0025] Fig.11 It is a front view of the third embodiment of the present invention.

[0026] Fig.12 The present invention Fig.11 Sectional view along line HH.

[0027] 101-servo motor, 102-translation block, 103-parallel block, 104-lifting screw, 105-fixed cylinder, 106-reset mechanism, 107-thread groove, 108-translation groove, 109-translation motor, 110-translation screw, 111-thread sleeve, 112-driven gear, 113-lifting motor, 114-driving gear, 115-C-shaped block, 116-fixing mechanism, 117-lifting rod, 118-lifting groove, 119-polygonal rod, 120-polygonal groove, 201-T-shaped block, 202-bidirectional screw, 203-fixed seat, 204-reset clamp, 205-T-slot, 206-second threaded groove, 207-knob, 208-protective pad, 209-fixed screw, 210-rotating sleeve, 211-protective box, 212-holding pad, 213-secondary gear, 214-internal thread, 215-square block, 216-anti-rotation cylinder, 217-rotating disk, 218-square groove, 219-main gear, 301-reinforcement rod, 302-reinforcement sleeve, 303-support block, 304-support shell, 305-support pad, 306-hydraulic cylinder. DETAILED DESCRIPTION

[0028] Embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0029] First embodiment:

[0030] See also Figure 1 to Figure 5 ,in Figure 1 is a three-dimensional stereogram of the first embodiment of the present invention, Figure 2 is a front view of a first embodiment of the present invention, Figure 3 The present invention Figure 2 The cross-sectional view along the AA line. Figure 4 The present invention Figure 2 The cross-sectional view of the BB line. Figure 5 The present invention Figure 2 Sectional view along the CC line.

[0031] The present invention provides a vertebral universal reducer for orthopedic spine surgery, comprising a servo motor 101, a translation block 102, a parallel block 103, a lifting screw 104 and a fixing cylinder 105, wherein a reset mechanism 106 is arranged at the output end of the servo motor 101, a first thread groove 107 is arranged in the translation block 102, a translation groove 108 is arranged in the parallel block 103, a translation motor 109 is arranged at one end of the parallel block 103, a translation screw 110 is arranged at the output end of the translation motor 109, and the The translation screw 110 is located in the translation groove 108, a threaded sleeve 111 is sleeved on one end of the fixed cylinder 105, a driven gear 112 is arranged on the outside of the threaded sleeve 111, a lifting motor 113 is arranged on the outside of the fixed cylinder 105, a driving gear 114 is arranged on the output end of the lifting motor 113, and the driving gear 114 is meshed with the driven gear 112, a C-shaped block 115 is arranged below the fixed cylinder 105, a fixing mechanism 116 is arranged in the C-shaped block 115, and the servo motor 113 is provided with a driving gear 114. The servo motor 101 is arranged at one end of the translation block 102, the translation block 102 is slidably connected to the parallel block 103 and is located in the translation groove 108, and the translation screw 110 is threadedly connected to the parallel block 103 and is located in the first thread groove 107, the parallel block 103 is arranged above the lifting screw 104, the lifting screw 104 is arranged in the fixed cylinder 105, and the threaded sleeve 111 is threadedly connected to the lifting screw 104 and is sleeved on the lifting screw On the outside of the rod 104, by setting the structure of the present design into an inverted L shape, the entire device can be fixed only on one side of the bed under the action of the fixing mechanism 116, so as to avoid occupying too much space and facilitate surgical operations. Subsequently, the lifting motor 113 is controlled so that the reset mechanism 106 can be adjusted to a suitable height to suit different people. At the same time, the servo motor 101 can adjust the rotation angle of the reset mechanism 106, so that the reset mechanism 106 can adapt to different fixing angles.

[0032] Among them, two lifting rods 117 are arranged in the translation groove 108, and the translation block 102 also has two lifting grooves 118, and the two lifting rods 117 are respectively located in the corresponding lifting grooves 118. The arrangement of the lifting rods 117 and the lifting grooves 118 can facilitate the improvement of the stability of the translation block 102 during movement.

[0033] Secondly, a polygonal rod 119 is provided in the fixed cylinder 105, and a polygonal groove 120 is provided in the lifting screw 104, and the polygonal rod 119 is located in the polygonal groove 120. The polygonal rod 119 can prevent the lifting screw 104 from rotating and improve the stability of the lifting screw 104 during rotation.

[0034] When using the vertebral universal reducer for orthopedic spine surgery of this embodiment, the device is placed on one side of the bed so that one side of the bed extends into the C-shaped block 115, and the fixing mechanism 116 is controlled to abut against the bed to achieve fixation, and then the lifting motor 113 is controlled to rotate clockwise so that the lifting motor 113 drives the driving gear 114, and the driving gear 114 drives the driven gear 112, and the threaded sleeve 111 rotates under the action of the driven gear 112, and the lifting screw 104 is fixed on the polygonal rod 119. The servo motor 101 of the present invention drives the resetting mechanism 106, so that the angle of the resetting mechanism 106 can be adjusted to a comfortable angle for the patient, thereby effectively solving the technical problem that the overall shape of the above structure is a gantry, and the two C-shaped blocks 115 are fixed on both sides of the bed, resulting in the two support plates occupying too much space, making the surgical operation extremely inconvenient.

[0035] Second embodiment:

[0036] Based on the first embodiment, please refer to Figure 6 to Figure 10 ,in Figure 6 is a front view of a second embodiment of the present invention, Figure 7 The present invention Figure 6 The cross-sectional view of the DD line, Figure 8 The present invention Figure 7 A partial enlarged view of point E in the middle. Fig. 9 The present invention Figure 7 The cross-sectional view of the FF line, Fig.10 The present invention Figure 6 Sectional view along the GG line.

[0037] The present invention provides a vertebral universal reducer for orthopedic spinal surgery, wherein the reduction mechanism 106 comprises two T-blocks 201, a bidirectional screw 202 and a fixing seat 203, a reduction clamp 204 is arranged below the T-block 201, a T-slot 205 is arranged in the fixing seat 203, a second thread groove 206 is arranged in the T-block 201, the two T-blocks 201 are respectively slidably connected to the fixing seat 203 and symmetrically arranged in the T-slot 205, the bidirectional screw 202 is rotationally connected to the fixing seat 203 and is located in the fixing seat 203, and the bidirectional screw 202 is also threadedly connected to the corresponding T-block 201 and is located in the second thread groove 206, and the fixing seat 203 is fixedly connected to the servo motor 101 and is located at the output end of the servo motor 101.

[0038] Among them, the resetting mechanism 106 also includes a knob 207 and two protective pads 208. A plurality of anti-slip protrusions are arranged on the outer side of the knob 207. The knob 207 is fixedly connected to the bidirectional screw 202 and is located at one end of the bidirectional screw 202. The two protective pads 208 are respectively bonded to the corresponding resetting clamps 204 and are located on the inner side of the resetting clamps 204. The bidirectional screw 202 is driven clockwise by the knob 207. The two T-shaped blocks 201 move in a direction approaching each other under the action of the second thread groove 206 and the bidirectional screw 202, thereby fixing the part of the patient that needs to be fixed under the action of the protective pads 208.

[0039] Secondly, the fixing mechanism 116 includes a fixing screw 209, a rotating sleeve 210 and a protective box 211. One end of the fixing screw 209 is provided with a supporting pad 212, one end of the rotating sleeve 210 is provided with a secondary gear 213, the rotating sleeve 210 has an internal thread 214, and the protective box 211 is provided with a main gear 219, and the volume of the main gear 219 is multiple times that of the secondary gear 213. The rotating sleeve 210 is rotatably connected to the C-shaped block 115 through a bearing. The rotating sleeve 210 is also threadedly connected to the fixed screw 209 and sleeved on the outside of the fixed screw 209, and the supporting pad 212 is located on the inner side of the C-shaped block 115. The protective box 211 is fixedly connected to the C-shaped block 115 and is located below the C-shaped block 115. The main gear 219 is meshed with the sub-gear 213 and is located on the outside of the sub-gear 213, and is also located in the protective box 211.

[0040] At the same time, the fixing mechanism 116 also includes a square block 215, an anti-rotation cylinder 216 and a rotating disk 217. The anti-rotation cylinder 216 has a square groove 218. The square block 215 is fixedly connected to the fixing screw 209 and is located below the fixing screw 209. The square block 215 is also slidably connected to the anti-rotation cylinder 216 and is located in the square groove 218. The anti-rotation cylinder 216 is fixedly connected to the protective box 211 and is located below the protective box 211. The rotating disk 217 is fixedly connected to the main gear 219 and is located on the main gear 219. The main gear 219 is driven clockwise by the rotating disk 217. The sub-gear 213 drives the rotating sleeve 210 to rotate under the action of the main gear 219. The fixing screw 209 moves upward under the action of the square block 215 and the internal thread 214, thereby pushing the abutment pad 212 to abut the bed, thereby completing the fixation.

[0041] When using a vertebral universal reducer for orthopedic spinal surgery of this embodiment, the bidirectional screw 202 is driven by the clockwise knob 207, and the two T-shaped blocks 201 are moved in a direction approaching each other under the action of the second thread groove 206 and the bidirectional screw 202, so that the part of the patient that needs to be fixed is fixed under the action of the protective pad 208; the main gear 219 is driven clockwise by the rotating disk 217, and the sub-gear 213 drives the rotating sleeve 210 to rotate under the action of the main gear 219, and the fixing screw 209 moves upward under the action of the square block 215 and the internal thread 214, thereby pushing the abutment pad 212 to abut against the bed, thereby completing the fixation.

[0042] Third embodiment:

[0043] Based on the first embodiment, please refer to Figure 11-12 ,in Fig.11 is a front view of a third embodiment of the present invention, Fig.12 The present invention Fig.11 Sectional view along line HH.

[0044] The present invention provides a vertebral universal reducer for orthopedic spinal surgery, which also includes a reinforcement component and two supporting mechanisms. The reinforcement component is arranged between the parallel block 103 and the fixed tube 105, and the two supporting mechanisms are respectively arranged below the C-shaped block 115 and are also symmetrically arranged on both sides of the protective box 211.

[0045] Among them, the reinforcement component includes a reinforcement rod 301 and a reinforcement sleeve 302, the reinforcement rod 301 is fixedly connected to the reinforcement sleeve 302 and is located on the outside of the reinforcement sleeve 302, the reinforcement rod 301 is also fixedly connected to the parallel block 103 and is located below the parallel block 103, the reinforcement sleeve 302 is slidably connected to the fixed tube 105 and is sleeved on the outside of the fixed tube 105. The arrangement of the reinforcement rod 301 and the reinforcement sleeve 302 can facilitate the improvement of the support stability of the parallel block 103.

[0046] Secondly, the support mechanism includes a support block 303 and a support shell 304, a support pad 305 is arranged below the support block 303, a hydraulic cylinder 306 is arranged in the support shell 304, the support block 303 is slidably connected to the support shell 304, and is located in the support shell 304, and is also located at the output end of the hydraulic cylinder 306, the support shell 304 is fixedly connected to the C-shaped block 115, and is located below the C-shaped block 115, and is also located on one side of the protective box 211, by starting the hydraulic cylinder 306, the hydraulic cylinder 306 pushes the support block 303 to slide in the support shell 304, so that the support pad 305 is against the ground, thereby improving the support stability of the device.

[0047] When using a vertebral universal reducer for orthopedic spinal surgery according to the present embodiment, the support stability of the parallel block 103 can be improved by setting the reinforcement rod 301 and the reinforcement sleeve 302; the hydraulic cylinder 306 is started to push the support block 303 to slide in the support shell 304, so that the support pad 305 is against the ground, thereby improving the support stability of the device.

[0048] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A vertebral universal reducer for orthopedic spine surgery, characterized in that: It includes a servo motor, a translation block, a parallel block, a lifting screw and a fixed cylinder, wherein the output end of the servo motor is provided with a reset mechanism, the translation block has a first thread groove, the parallel block has a translation groove, one end of the parallel block is provided with a translation motor, the output end of the translation motor is provided with a translation screw, and the translation screw is located in the translation groove, one end of the fixed cylinder is sleeved with a threaded sleeve, the outer side of the threaded sleeve is provided with a driven gear, the outer side of the fixed cylinder is provided with a lifting motor, and the output end of the lifting motor is provided with a driving gear, and The driving gear is meshed with the driven gear, a C-shaped block is arranged below the fixed cylinder, a fixing mechanism is arranged in the C-shaped block, the servo motor is arranged at one end of the translation block, the translation block is slidably connected with the parallel block and is located in the translation groove, and the translation screw is threadedly connected with the parallel block and is located in the first thread groove, the parallel block is arranged above the lifting screw, the lifting screw is arranged in the fixed cylinder, and the threaded sleeve is threadedly connected with the lifting screw and is sleeved on the outside of the lifting screw.

2. The vertebral universal reducer for orthopedic spine surgery according to claim 1, characterized in that: Two lifting rods are arranged in the translation groove, and two lifting grooves are also arranged in the translation block, and the two lifting rods are respectively located in the corresponding lifting grooves.

3. The vertebral universal reducer for orthopedic spine surgery according to claim 2, characterized in that: A polygonal rod is arranged in the fixing cylinder, a polygonal groove is arranged in the lifting screw rod, and the polygonal rod is located in the polygonal groove.

4. The vertebral universal reducer for orthopedic spine surgery according to claim 3, characterized in that: The reset mechanism includes two T-blocks, a bidirectional screw and a fixed seat, a reset clamp is arranged below the T-block, a T-slot is arranged in the fixed seat, a second thread groove is arranged in the T-block, the two T-blocks are respectively slidably connected to the fixed seat and are symmetrically arranged in the T-slot, the bidirectional screw is rotatably connected to the fixed seat and is located in the fixed seat, and the bidirectional screw is also threadedly connected to the corresponding T-block and is located in the second thread groove, the fixed seat is fixedly connected to the servo motor and is located at the output end of the servo motor.

5. The vertebral universal reducer for orthopedic spine surgery according to claim 4, characterized in that: The reset mechanism also includes a knob and two protective pads. A plurality of anti-slip protrusions are arranged on the outer side of the knob. The knob is fixedly connected to the bidirectional screw and is located at one end of the bidirectional screw. The two protective pads are respectively bonded to the corresponding reset clamps and are located on the inner side of the reset clamps.

6. The vertebral universal reducer for orthopedic spine surgery according to claim 5, characterized in that: The fixing mechanism includes a fixed screw, a rotating sleeve and a protective box. A supporting pad is provided at one end of the fixed screw, a secondary gear is provided at one end of the rotating sleeve, an internal thread is provided in the rotating sleeve, a main gear is provided in the protective box, and the volume of the main gear is multiple times that of the secondary gear, the rotating sleeve is rotatably connected to the C-shaped block through a bearing and is located in the C-shaped block, the rotating sleeve is also threadedly connected to the fixed screw and is sleeved on the outside of the fixed screw, and the supporting pad is located on the inside of the C-shaped block, the protective box is fixedly connected to the C-shaped block and is located below the C-shaped block, the main gear is meshed with the secondary gear, is located on the outside of the secondary gear, and is also located in the protective box.

7. The vertebral universal reducer for orthopedic spine surgery according to claim 6, characterized in that: The fixing mechanism also includes a square block, an anti-rotation cylinder and a rotating disk. The anti-rotation cylinder has a square groove. The square block is fixedly connected to the fixing screw and is located below the fixing screw. The square block is also slidably connected to the anti-rotation cylinder and is located in the square groove. The anti-rotation cylinder is fixedly connected to the protective box and is located below the protective box. The rotating disk is fixedly connected to the main gear and is located on the main gear.

Images