Cerebrovascular intervention puncture positioning device for neurology department

Abstract

The invention provides a neurology cerebrovascular intervention puncture positioning device which comprises a fixing bottom frame, a rear side plate is fixedly connected to the rear side of the fixing bottom frame, an upper top plate is fixedly connected to the top end of the rear side plate, fixing plates are fixedly connected to the four corners of the upper top plate, a first threaded rod is rotatably connected between the fixing plates on one side, and a second threaded rod is rotatably connected between the fixing plates on the other side. A sliding rod is fixedly connected between the fixing plates on the other side, moving blocks are arranged in the middle of the first threaded rod and the middle of the sliding rod, the first threaded rod is in threaded fit with the moving blocks, the sliding rod is in sliding fit with the moving blocks, and a moving frame is fixedly connected to the top end between the moving blocks. The first motor drives the first threaded rod to rotate, the first threaded rod and the moving block are in threaded fit after rotation, transverse threaded movement can be achieved, the sliding rod structure on the other side is matched to keep stable position movement, and then the second motor drives the threaded sleeve to move in the longitudinal position.

Description

Technical Field

[0001] The invention relates to the technical field of cerebrovascular puncture positioning, in particular to a neurology cerebrovascular interventional puncture positioning device. Background Art

[0002] Neurology cerebrovascular interventional puncture is an interventional procedure used to treat neurovascular diseases. In this procedure, doctors use special guide wires and catheters to introduce them into abnormal blood vessels through vascular puncture, and then use guide needles or microcatheters to treat vascular diseases. This interventional procedure is suitable for various neurovascular diseases, such as cerebral aneurysms, cerebral vascular stenosis, cerebral thrombosis, etc. Through interventional surgery, the function of abnormal blood vessels can be effectively repaired or improved, blood flow obstruction can be reduced, and potential cerebrovascular events (such as stroke) can be avoided.

[0003] In the prior art, neurology departments need to give patients anesthesia when performing puncture positioning. However, patients are unconscious after anesthesia, so during the puncture process, patients will involuntarily shift their positions, affecting the puncture operation. At the same time, traditional puncture positioning is manually operated by medical staff, and inexperienced medical staff cannot complete accurate positioning, which is inconvenient to use. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a neurological cerebrovascular interventional puncture positioning device, which solves the problem that traditional puncture positioning is all done manually by medical staff, and inexperienced medical staff cannot complete accurate positioning.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: A neurology cerebrovascular interventional puncture positioning device, comprising: a fixed base frame, a rear side of the fixed base frame is fixedly connected to a rear side plate, the top of the rear side plate is fixedly connected to an upper plate, the four corners of the upper plate are fixedly connected to fixed plates, a first threaded rod is rotatably connected between the fixed plates on one side, and a sliding rod is fixedly connected between the fixed plates on the other side, a moving block is arranged in the middle of the first threaded rod and the sliding rod, the first threaded rod and the moving block are threadedly matched, the sliding rod and the moving block are slidably matched, a moving frame is fixedly connected to the top between the moving blocks, a T-shaped groove is provided inside the moving frame, a moving sleeve is provided inside the T-shaped groove, a groove is provided below the middle of the moving sleeve, the groove and the moving frame are slidably matched, the inner bottom end of the moving sleeve is fixedly connected to a third motor, the driving end of the third motor is fixedly connected to a second threaded rod, the external thread of the second threaded rod is threadedly matched with a telescopic rod, and the telescopic rod and the moving sleeve are plug-fitted.

[0008] Preferably, an adjusting bolt is threadedly connected to the middle of the bottom end of the fixed base frame, and a resistance plate is rotatably connected to the top end of the adjusting bolt, and the resistance plate is slidably matched with the inner wall of the rear side plate.

[0009] Preferably, an arc-shaped groove is provided on the front side of the upper top plate, and clamping plates are provided at both ends of the inner side of the arc-shaped groove.

[0010] Preferably, a fastening bolt is rotatably connected to the middle portion of the outer side of the clamping plate, and the fastening bolt is threadably matched with the upper top plate.

[0011] Preferably, the top end of the telescopic rod is fixedly connected with a puncture needle body.

[0012] Preferably, a screw rod is rotatably connected to one side of the interior of the movable frame, and the screw rod and the movable sleeve are threadedly matched.

[0013] Preferably, a second motor is fixedly connected to the outer side of the moving block on one side, and a driving end of the second motor is fixedly connected to the screw rod.

[0014] Preferably, a first motor is fixedly connected to the rear side of the fixing plate on one side, and a driving end of the first motor is fixedly connected to the first threaded rod.

[0015] (III) Beneficial effects

[0016] The present invention provides a neurological cerebrovascular interventional puncture positioning device, which has the following beneficial effects:

[0017] 1. The present invention discloses a neurological cerebrovascular interventional puncture positioning device, which comprises: a first motor, a first threaded rod, a moving block, a second motor, a screw and a moving sleeve. The first motor drives the first threaded rod to rotate. After the rotation, the first threaded rod and the moving block are threadedly matched to achieve lateral thread movement and cooperate with the sliding rod structure on the other side to maintain a stable position movement. Subsequently, the second motor drives and drives the screw to rotate. After the rotation, the screw is threadedly matched with the moving sleeve to perform longitudinal position movement operation of the threaded sleeve. The lateral and longitudinal position adjustment is completed through this structure.

[0018] 2. The present invention provides a neurological cerebrovascular interventional puncture positioning device, which is provided with: a third motor, a second threaded rod and a telescopic rod. The third motor drives the second threaded rod to rotate, and the second threaded rod cooperates with the telescopic rod thread to realize thread movement. Since the telescopic rod and the movable sleeve cooperate in telescopic manner, a stable rising and falling effect is maintained, and a height adjustment effect is completed, thereby realizing positioning at different positions.

[0019] 3. The present invention provides a neurological cerebrovascular interventional puncture positioning device, which is provided with: an adjusting bolt, a contact plate, a fastening bolt and a clamping plate. By rotating the adjusting bolt, the contact plate contacts with the bottom plate of the bed after rotation to achieve clamping, which is convenient for installation and disassembly. Subsequently, by rotating the fastening bolt, the thread of the clamping plate is moved after rotation to complete the extension, which is convenient for completing the contact fixation of the patient's head and maintaining stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0021] Figure 2 It is a side bottom view schematic diagram of the present invention;

[0022] Figure 3 It is a schematic cross-sectional view of the movable sleeve of the present invention;

[0023] Figure 4 It is a top view schematic diagram of the present invention;

[0024] Figure 5 For the present invention Figure 4 A is an enlarged schematic diagram;

[0025] Figure 6 It is an enlarged schematic diagram of the movable sleeve structure of the present invention.

[0026] Among them, 1. Fixed base frame; 2. Rear side plate; 3. First threaded rod; 4. First motor; 5. Second motor; 6. Moving sleeve; 7. Telescopic rod; 8. Puncture needle body; 9. Moving frame; 10. Moving block; 11. Sliding rod; 12. Fastening bolt; 13. Clamping plate; 14. Resistance plate; 15. Adjusting bolt; 16. Upper top plate; 17. Arc groove; 18. T-shaped groove; 19. Second threaded rod; 20. Third motor; 21. Fixed plate; 22. Groove; 23. Screw rod. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] Embodiment 1:

[0029] like Figure 1-6As shown, the embodiment of the present invention provides a neurological cerebrovascular interventional puncture positioning device, comprising: a fixed base frame 1, characterized in that: a rear side plate 2 is fixedly connected to the rear side of the fixed base frame 1, the fixed base frame 1, the rear side plate 2 and the concave structure of the upper top plate 16 are clamped with the bed, the top of the rear side plate 2 is fixedly connected to the upper top plate 16, the four corners of the upper top plate 16 are fixedly connected to the fixed plates 21, a first threaded rod 3 is rotatably connected between the fixed plates 21 on one side, a sliding rod 11 is fixedly connected between the fixed plates 21 on the other side, a moving block 10 is arranged in the middle of the first threaded rod 3 and the sliding rod 11, the first threaded rod 3 and the moving block 10 are threadedly matched, the sliding rod 11 and the moving block 10 are slidably matched, a moving frame 9 is fixedly connected to the top between the moving blocks 10, a T-shaped slot 18 is provided inside the moving frame 9, a moving sleeve 6 is provided inside the T-shaped slot 18, a groove 22 is provided at the lower middle part of the moving sleeve 6, and the groove 22 and the moving frame 9 are slidably matched The inner bottom end of the movable sleeve 6 is fixedly connected to the third motor 20, which is driven by the third motor 20. After driving, the second threaded rod 19 is driven to rotate, and after rotation, it is threadedly matched with the telescopic rod 7 to realize threaded movement. The driving end of the third motor 20 is fixedly connected to the second threaded rod 19, and the external thread of the second threaded rod 19 is matched with the telescopic rod 7. The telescopic rod 7 and the movable sleeve 6 are telescopically matched to maintain a stable rising and falling effect and complete the height adjustment effect, thereby realizing positioning at different positions. The telescopic rod 7 and the movable sleeve 6 are plug-in matched, and an arc groove 17 is provided on the front side of the upper top plate 16. Clamping plates 13 are provided at both ends of the inner side of the arc groove 17. The middle part of the outer side of the clamping plate 13 is rotatably connected with a fastening bolt 12. Through the rotation of the fastening bolt 12, the thread of the clamping plate 13 is moved after rotation to complete the extension, which is convenient for completing the resistance fixation of the patient's head and maintaining stability. The fastening bolt 12 and the upper top plate 16 are threadedly matched.

[0030] The middle part of the bottom end of the fixed base frame 1 is threadedly connected with an adjusting bolt 15. By rotating the adjusting bolt 15, the bottom plate of the bed is contacted by the contact plate 14 after rotation to achieve clamping, which is convenient for installation and disassembly. The top of the adjusting bolt 15 is rotatably connected with the contact plate 14. The contact plate 14 and the inner wall of the rear side plate 2 are slidably matched. The top of the telescopic rod 7 is fixedly connected with the puncture needle body 8. The inner side of the movable frame 9 is rotatably connected with a screw rod 23. The screw rod 23 and the movable sleeve 6 are threadedly matched. The outer side of the movable block 10 on one side is fixedly connected with a second motor 5. The second motor 5 drives the screw rod 23, which drives the screw rod 23 to move. The rod 23 rotates and, after rotation, is threadedly matched with the movable sleeve 6, so that the longitudinal position of the threaded sleeve 6 can be moved. The lateral and longitudinal position adjustment is completed through this structure. The driving end of the second motor 5 is fixedly connected to the screw rod 23. The rear side of the fixed plate 21 on one side is fixedly connected to the first motor 4. The first motor 4 and the second motor 5 are adjusted according to the puncture position. After the first motor 4 is driven, it drives the rotation of the first threaded rod 3. After rotation, the first threaded rod 3 and the movable block 10 are threadedly matched to realize lateral thread movement. The driving end of the first motor 4 is fixedly connected to the first threaded rod 3.

[0031] Embodiment 2:

[0032] The embodiment of the present invention provides a neurology cerebrovascular interventional puncture positioning device, comprising: a fixed base frame 1, characterized in that: a rear side plate 2 is fixedly connected to the rear side of the fixed base frame 1, the fixed base frame 1, the rear side plate 2 and the concave structure of the upper top plate 16 are clamped with the bed, the top of the rear side plate 2 is fixedly connected to the upper top plate 16, the four corners of the upper top plate 16 are fixedly connected to the fixed plate 21, a first threaded rod 3 is rotatably connected between the fixed plates 21 on one side, a sliding rod 11 is fixedly connected between the fixed plates 21 on the other side, a moving block 10 is arranged in the middle of the first threaded rod 3 and the sliding rod 11, the first threaded rod 3 and the moving block 10 are threadedly matched, the sliding rod 11 and the moving block 10 are slidably matched, a moving frame 9 is fixedly connected to the top between the moving blocks 10, a T-shaped slot 18 is provided inside the moving frame 9, a moving sleeve 6 is provided inside the T-shaped slot 18, a groove 22 is provided below the middle of the moving sleeve 6, and the groove 22 and the moving frame 9 are slidably matched, The inner bottom end of the movable sleeve 6 is fixedly connected to a third motor 20, which is driven by the third motor 20. After driving, the second threaded rod 19 is driven to rotate, and after rotation, it is threadedly matched with the telescopic rod 7 to realize threaded movement. The driving end of the third motor 20 is fixedly connected to the second threaded rod 19, and the external thread of the second threaded rod 19 is matched with the telescopic rod 7. The telescopic rod 7 and the movable sleeve 6 are telescopically matched to maintain a stable rising and falling effect and complete the height adjustment effect, thereby realizing positioning at different positions. The telescopic rod 7 and the movable sleeve 6 are plug-in matched. An arc groove 17 is provided on the front side of the upper top plate 16, and clamping plates 13 are provided at both ends of the inner side of the arc groove 17. The middle part of the outer side of the clamping plate 13 is rotatably connected with a fastening bolt 12. Through the rotation of the fastening bolt 12, the thread of the clamping plate 13 is moved after rotation to complete the extension, which is convenient for completing the resistance fixation of the patient's head and maintaining stability. The fastening bolt 12 and the upper top plate 16 are threadedly matched.

[0033] The middle part of the bottom end of the fixed base frame 1 is threadedly connected with an adjusting bolt 15. By rotating the adjusting bolt 15, the contact plate 14 contacts the bottom plate of the bed after rotation to achieve clamping, which is convenient for installation and disassembly. The top of the adjusting bolt 15 is rotatably connected with the contact plate 14, and the contact plate 14 and the inner wall of the rear side plate 2 are slidably matched. The top of the telescopic rod 7 is fixedly connected with the puncture needle body 8, and the inner side of the movable frame 9 is rotatably connected with a screw rod 23, and the screw rod 23 and the movable sleeve 6 are threadedly matched. The outer side of the movable block 10 on one side is fixedly connected with a second motor 5. The second motor 5 is driven, and after driving, it drives the rotation of the screw rod 23, and after rotating, it is threadedly matched with the movable sleeve 6, so that the longitudinal position of the threaded sleeve 6 can be moved. The horizontal and longitudinal position adjustment is completed through this structure.

[0034] Embodiment three:

[0035] The embodiment of the present invention provides a neurology cerebrovascular interventional puncture positioning device, comprising: a fixed base frame 1, characterized in that: a rear side plate 2 is fixedly connected to the rear side of the fixed base frame 1, the fixed base frame 1, the rear side plate 2 and the concave structure of the upper top plate 16 are clamped with the bed, the top of the rear side plate 2 is fixedly connected to the upper top plate 16, the four corners of the upper top plate 16 are fixedly connected to the fixed plate 21, a first threaded rod 3 is rotatably connected between the fixed plates 21 on one side, a sliding rod 11 is fixedly connected between the fixed plates 21 on the other side, a moving block 10 is arranged in the middle of the first threaded rod 3 and the sliding rod 11, the first threaded rod 3 and the moving block 10 are threadedly matched, the sliding rod 11 and the moving block 10 are slidably matched, a moving frame 9 is fixedly connected to the top between the moving blocks 10, a T-shaped slot 18 is provided inside the moving frame 9, a moving sleeve 6 is provided inside the T-shaped slot 18, a groove 22 is provided below the middle of the moving sleeve 6, and the groove 22 and the moving frame 9 are slidably matched, The inner bottom end of the movable sleeve 6 is fixedly connected to a third motor 20, which is driven by the third motor 20. After driving, the second threaded rod 19 is driven to rotate, and after rotation, it is threadedly matched with the telescopic rod 7 to realize threaded movement. The driving end of the third motor 20 is fixedly connected to the second threaded rod 19, and the external thread of the second threaded rod 19 is matched with the telescopic rod 7. The telescopic rod 7 and the movable sleeve 6 are telescopically matched to maintain a stable rising and falling effect and complete the height adjustment effect, thereby realizing positioning at different positions. The telescopic rod 7 and the movable sleeve 6 are plug-in matched. An arc groove 17 is provided on the front side of the upper top plate 16, and clamping plates 13 are provided at both ends of the inner side of the arc groove 17. The middle part of the outer side of the clamping plate 13 is rotatably connected with a fastening bolt 12. Through the rotation of the fastening bolt 12, the thread of the clamping plate 13 is moved after rotation to complete the extension, which is convenient for completing the resistance fixation of the patient's head and maintaining stability. The fastening bolt 12 and the upper top plate 16 are threadedly matched.

[0036] An adjusting bolt 15 is threadedly connected to the middle of the bottom end of the fixed base frame 1. By rotating the adjusting bolt 15, the contact plate 14 contacts the bottom plate of the bed after rotation to achieve clamping, which is convenient for installation and disassembly. The top end of the adjusting bolt 15 is rotatably connected to the contact plate 14, and the contact plate 14 and the inner wall of the rear side plate 2 are slidably matched. The top end of the telescopic rod 7 is fixedly connected to the puncture needle body 8.

[0037] Embodiment 4:

[0038] The embodiment of the present invention provides a neurology cerebrovascular interventional puncture positioning device, comprising: a fixed base frame 1, characterized in that: a rear side plate 2 is fixedly connected to the rear side of the fixed base frame 1, the fixed base frame 1, the rear side plate 2 and the concave structure of the upper top plate 16 are clamped with the bed, the top of the rear side plate 2 is fixedly connected to the upper top plate 16, the four corners of the upper top plate 16 are fixedly connected to the fixed plate 21, a first threaded rod 3 is rotatably connected between the fixed plates 21 on one side, a sliding rod 11 is fixedly connected between the fixed plates 21 on the other side, a moving block 10 is arranged in the middle of the first threaded rod 3 and the sliding rod 11, the first threaded rod 3 and the moving block 10 are threadedly matched, the sliding rod 11 and the moving block 10 are slidably matched, a moving frame 9 is fixedly connected to the top between the moving blocks 10, a T-shaped slot 18 is provided inside the moving frame 9, a moving sleeve 6 is provided inside the T-shaped slot 18, a groove 22 is provided below the middle of the moving sleeve 6, and the groove 22 and the moving frame 9 are slidably matched, The inner bottom end of the movable sleeve 6 is fixedly connected to a third motor 20, which is driven by the third motor 20. After driving, the second threaded rod 19 is driven to rotate, and after rotation, it is threadedly matched with the telescopic rod 7 to realize threaded movement. The driving end of the third motor 20 is fixedly connected to the second threaded rod 19, and the external thread of the second threaded rod 19 is matched with the telescopic rod 7. The telescopic rod 7 and the movable sleeve 6 are telescopically matched to maintain a stable rising and falling effect and complete the height adjustment effect, thereby realizing positioning at different positions. The telescopic rod 7 and the movable sleeve 6 are plug-in matched. An arc groove 17 is provided on the front side of the upper top plate 16, and clamping plates 13 are provided at both ends of the inner side of the arc groove 17. The middle part of the outer side of the clamping plate 13 is rotatably connected with a fastening bolt 12. Through the rotation of the fastening bolt 12, the thread of the clamping plate 13 is moved after rotation to complete the extension, which is convenient for completing the resistance fixation of the patient's head and maintaining stability. The fastening bolt 12 and the upper top plate 16 are threadedly matched.

[0039] Working principle: when in use, first fix the base frame 1, the rear side plate 2 and the concave structure of the upper top plate 16 to the bed, then rotate the adjusting bolt 15, and after rotation, the contact plate 14 contacts with the bottom plate of the bed to achieve clamping, which is convenient for installation and disassembly, then rotate the fastening bolt 12, and after rotation, the thread of the clamping plate 13 moves to complete the extension, which is convenient for completing the contact fixation of the patient's head and maintaining stability, and then adjust the first motor 4 and the second motor 5 according to the puncture position, first drive the first motor 4 to drive the rotation of the first threaded rod 3, and after rotation, the first threaded rod 3 and the moving block 10 are threadedly matched, that is, It can realize lateral thread movement and cooperate with the slide bar 11 structure on the other side to maintain stable position movement. Then the second motor 5 is driven, and the screw rod 23 is driven to rotate after driving. After rotation, it is threadedly matched with the movable sleeve 6 to perform the longitudinal position movement operation of the threaded sleeve 6. The lateral and longitudinal position adjustment is completed through this structure. After adjustment, it can be driven again by the third motor 20. After driving, it drives the second threaded rod 19 to rotate. After rotation, it is threadedly matched with the telescopic rod 7 to realize thread movement. Due to the telescopic cooperation between the telescopic rod 7 and the movable sleeve 6, a stable rising and falling effect is maintained, and the height adjustment effect is completed, thereby realizing positioning at different positions.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A neurological cerebrovascular interventional puncture positioning device, comprising: The fixed base frame (1) is characterized in that: the rear side of the fixed base frame (1) is fixedly connected to a rear side plate (2), the top of the rear side plate (2) is fixedly connected to an upper plate (16), the four corners of the upper plate (16) are fixedly connected to fixed plates (21), a first threaded rod (3) is rotatably connected between the fixed plates (21) on one side, and a sliding rod (11) is fixedly connected between the fixed plates (21) on the other side, a moving block (10) is provided in the middle of the first threaded rod (3) and the sliding rod (11), the first threaded rod (3) and the moving block (10) are threadedly matched, and the sliding rod (11) and the moving block (10) are slidingly matched, A moving frame (9) is fixedly connected to the top of the moving blocks (10), a T-shaped slot (18) is provided inside the moving frame (9), a moving sleeve (6) is provided inside the T-shaped slot (18), a groove (22) is provided at the lower middle part of the moving sleeve (6), the groove (22) and the moving frame (9) are slidably matched, a third motor (20) is fixedly connected to the bottom inner end of the moving sleeve (6), a second threaded rod (19) is fixedly connected to the driving end of the third motor (20), an external thread of the second threaded rod (19) is matched with a telescopic rod (7), and the telescopic rod (7) and the moving sleeve (6) are plug-fitted.

2. A neurology cerebrovascular interventional puncture positioning device according to claim 1, characterized in that: An adjusting bolt (15) is threadedly connected to the middle of the bottom end of the fixed base frame (1), and a contact plate (14) is rotatably connected to the top end of the adjusting bolt (15). The contact plate (14) is slidably matched with the inner wall of the rear side plate (2).

3. A neurological cerebrovascular interventional puncture positioning device according to claim 1, characterized in that: An arc-shaped groove (17) is provided on the front side of the upper top plate (16), and clamping plates (13) are provided at both ends of the inner side of the arc-shaped groove (17).

4. A neurological cerebrovascular interventional puncture positioning device according to claim 2, characterized in that: A fastening bolt (12) is rotatably connected to the middle portion of the outer side of the clamping plate (13), and the fastening bolt (12) and the upper top plate (16) are threadedly matched.

5. The neurology cerebrovascular interventional puncture positioning device according to claim 1, characterized in that: The top end of the telescopic rod (7) is fixedly connected to a puncture needle body (8).

6. A neurology cerebrovascular interventional puncture positioning device according to claim 1, characterized in that: A screw rod (23) is rotatably connected to one side of the interior of the movable frame (9), and the screw rod (23) and the movable sleeve (6) are threadedly matched.

7. The neurology cerebrovascular interventional puncture positioning device according to claim 1, characterized in that: A second motor (5) is fixedly connected to the outer side of the moving block (10) on one side, and a driving end of the second motor (5) is fixedly connected to a screw rod (23).

8. The neurology cerebrovascular interventional puncture positioning device according to claim 1, characterized in that: A first motor (4) is fixedly connected to the rear side of the fixed plate (21) on one side, and a driving end of the first motor (4) is fixedly connected to the first threaded rod (3).

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