Automatic cannula assembly equipment

By designing automatic cannulation assembly equipment, the valve body and pipe body are accurately operated by positioning, fixing, hot melting and moving mechanisms, the problems of loose connections and low accuracy caused by manual operation in the prior art are solved, and efficient and precise automatic assembly is achieved.

CN119748879APending Publication Date: 2025-04-04KUNSHAN TECHLEADER ENG
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Patent Information

Application Number
CN202411984173.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-31
Publication Date
2025-04-04

AI Technical Summary

Technical Problem

During the assembly of the cannula, manual operation of the existing valve body causes the connection degree to be not tight enough, easy to loosen, and the installation accuracy is low, there are differences, and it does not meet the product requirements.

Method used

An automatic cannulation assembly equipment is designed, including a positioning mechanism, a fixing mechanism, a hot melt mechanism and a moving mechanism. The valve body and the pipe body are accurately positioned and pressed through the pressing component and the compression component, and the hot melt assembly of the pipe body is used to ensure the automation and accuracy of the assembly process.

Benefits of technology

It achieves high degree of automation, precise assembly process control, prevents position deviation between the valve body and the pipe body during pressing, and improves assembly efficiency and product consistency.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present invention relates to the field of automation technology, and relates to an automatic intubation assembly device. The pressing component of the present invention presses and positions the valve body on the positioning fixture, and the pressing component presses and positions the tube body on the fixed fixture. The moving mechanism drives the tube body on the fixed mechanism to move to the hot melt mechanism. After the sliding component drives the tube body on the fixed fixture and the hot melt mechanism to heat, the moving mechanism drives the heated tube body to move to the positioning mechanism to be pressed and assembled with the valve body, thereby completing the pressing and installation of the valve body, pipe material, and pipe sleeve, with a high degree of automation and high work efficiency. The pressing component and the pressing component press and position the valve body and the tube body respectively, realizing accurate positioning of the valve body and the tube body, preventing the valve body and the tube body from shifting in position during the pressing process, and the assembly process is precisely controlled with high assembly efficiency.
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Description

Technical Field

[0001] The invention relates to the field of automation technology, and in particular to automatic cannula assembly equipment. Background Art

[0002] The valve body is a device used to control the direction, pressure, and flow of a fluid. It is usually installed on equipment or piping to achieve the cutoff, regulation, diversion, pressure stabilization, diversion, or pressure relief of the internal fluid. After the valve body on the market is processed, it needs to be inserted and assembled for use. The existing valve body is generally positioned by a jig and then manually inserted. Manual insertion can easily lead to the connection between the pipe and the valve body being not tight enough and easy to loosen. At the same time, the installation accuracy of the pipe and the valve body is low, which makes each product different and does not meet the product requirements. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an automatic intubation assembly device with a high degree of automation, which can prevent the position deviation of the valve body and the pipe body during the pressing process, accurately control the assembly process and have high assembly efficiency.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention to solve the technical problems is:

[0005] An automatic cannula assembly device, comprising:

[0006] The positioning mechanism comprises a positioning frame, on which a positioning fixture for positioning the valve body is arranged, and above the positioning fixture is a material pressing assembly, which is used to press the valve body tightly and position it on the positioning fixture;

[0007] A fixing mechanism is arranged opposite to the positioning fixture, the fixing mechanism comprises a fixing frame, a fixing fixture for loading the tube body is slidably arranged on the fixing frame, a pressing assembly is arranged on the fixing frame, and the pressing assembly is used to press the tube body and position it on the fixing fixture;

[0008] The hot melt mechanism is arranged opposite to the fixed fixture, the fixed fixture is drivingly connected to the sliding component, the sliding component drives the tube body on the fixed fixture to heat the hot melt mechanism, and then performs hot melt assembly with the tube body on the positioning fixture;

[0009] The moving mechanism is drivingly connected to the fixing frame, and the moving mechanism is used to drive the fixing mechanism to move and switch positions.

[0010] In one embodiment of the present invention, the positioning fixture comprises a fixture block, the fixture block is provided with a positioning inclined surface, the positioning inclined surface is provided with a positioning groove matching the valve body, and the bottom surface of the positioning groove is provided with a positioning hole and an air suction hole.

[0011] In one embodiment of the present invention, the pressing assembly includes a pressing cylinder, which is arranged on a positioning frame. The pressing cylinder is drivingly connected to the pressing frame, and the pressing frame is slidably arranged on a guide rail of the positioning frame. A pressing block is arranged on the pressing frame, and a contoured surface matching the valve body is arranged on the pressing block.

[0012] In one embodiment of the present invention, the fixing fixture includes a fixed seat and a movable seat, the tube body includes a tube and a tube sleeve, the fixed seat is arranged on the fixed frame, the fixed seat is provided with a support groove for placing the free end of the tube, the movable seat is slidably arranged on the fixed frame, the movable seat is provided with a limit groove matching the support groove, the limit groove is provided with a limit card groove, the outer side of the tube sleeve is provided with a limit protrusion matching the limit card groove, and the tube is passed through the tube sleeve.

[0013] In one embodiment of the present invention, the clamping assembly includes a clamping cylinder, which is drivingly connected to a clamping block. The clamping block is provided with a clamping block matching the tube body, and the clamping block is provided with a clamping groove. The clamping cylinder drives the clamping block to clamp the tube body and position it on the fixing fixture.

[0014] In one embodiment of the present invention, the sliding assembly includes a sliding cylinder, the sliding cylinder is arranged on the fixed frame, the sliding cylinder is drivingly connected to the movable seat, the fixed frame is provided with a slide rail, and the movable seat is slidably arranged on the slide rail.

[0015] In one embodiment of the present invention, the hot melt mechanism includes a hot melt, the hot melt is arranged on a hot melt frame, a hot melt rod is arranged on the hot melt frame, the hot melt frame is slidably arranged on a guide frame, a guide cylinder is arranged on the guide frame, and the guide cylinder is drivingly connected to the hot melt frame.

[0016] In one embodiment of the present invention, the moving mechanism includes a moving module, the moving module is drivingly connected to the moving plate, the fixing mechanism is arranged on the moving plate, and both sides of the moving plate are slidably arranged on the moving track.

[0017] In one embodiment of the present invention, a limiting mechanism is further included, wherein the limiting mechanism is arranged opposite to the fixing mechanism, the limiting mechanism includes a limiting frame, a reference plate is arranged on the limiting frame, the limiting frame is slidably arranged on a guide bracket, a limiting cylinder is arranged on the guide bracket, and the limiting cylinder is drivingly connected to the limiting frame.

[0018] In one embodiment of the present invention, the positioning mechanism is arranged on an adjustment plate, the adjustment plate is slidably arranged on an adjustment frame, an adjustment cylinder is arranged on the adjustment frame, and the adjustment cylinder is drivingly connected to the adjustment plate.

[0019] Beneficial effects of the present invention:

[0020] The pressing assembly of the present invention presses and positions the valve body on the positioning fixture, and the pressing assembly presses and positions the tube body on the fixed fixture. The moving mechanism drives the tube body on the fixed mechanism to move to the hot-melt mechanism. After the sliding assembly drives the tube body on the fixed fixture and the hot-melt mechanism to heat, the moving mechanism drives the heated tube body to move to the positioning mechanism for press-fit assembly with the valve body, thereby completing the press-fit installation of the valve body, pipe material, and pipe sleeve. The automation degree is high and the work efficiency is high. The pressing assembly and the pressing assembly press and position the valve body and the tube body respectively, so as to realize the precise positioning of the valve body and the tube body and prevent the valve body and the tube body from shifting in position during the pressing process. The assembly process is precisely controlled and the assembly efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of an automatic cannula assembly device of the present invention.

[0022] Figure 2 It is a schematic diagram of the hot melt mechanism of the present invention.

[0023] Figure 3 It is a schematic diagram of the positioning mechanism of the present invention.

[0024] Figure 4 It is a schematic diagram of the fixing mechanism of the present invention.

[0025] Explanation of the reference numerals in the figure: 1. Positioning mechanism; 11. Positioning frame; 12. Adjusting plate; 13. Adjusting frame; 14. Adjusting cylinder; 2. Pressing cylinder; 21. Pressing frame; 22. Pressing block; 23. Profiling surface; 3. Valve body; 4. Positioning fixture; 41. Fixing block; 42. Positioning groove; 43. Positioning hole; 44. Air suction hole; 5. Fixing fixture; 51. Fixing seat; 52. Support groove; 53. Moving seat; 54. Limiting groove; 55. Limiting card slot; 56. Slide rail; 57. Sliding air cylinder Cylinder; 58, tube body; 59, tube; 591, tube sleeve; 592, limit protrusion; 6, limit mechanism; 61, limit frame; 62, reference plate; 63, guide bracket; 64, limit cylinder; 7, moving mechanism; 71, moving module; 72, moving plate; 73, moving track; 8, fixed frame; 81, clamping cylinder; 82, clamping block; 83, clamping block; 9, hot melt mechanism; 91, hot melt frame; 92, hot melt; 93, hot melt rod; 94, guide frame; 95, guide cylinder. DETAILED DESCRIPTION

[0026] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0027] Reference Figure 1-4 As shown, an automatic cannula assembly device comprises:

[0028] The positioning mechanism 1 comprises a positioning frame 11, on which a positioning fixture 4 for positioning the valve body 3 is arranged, and above the positioning fixture 4 a material pressing component is arranged, and the material pressing component is used to press and position the valve body 3 on the positioning fixture 4;

[0029] A fixing mechanism is arranged opposite to the positioning fixture 4, and the fixing mechanism includes a fixing frame 8, on which a fixing fixture 5 for loading a tube body 58 is slidably provided, and a clamping assembly is arranged on the fixing frame 8, and the clamping assembly is used to clamp and position the tube body 58 on the fixing fixture 5;

[0030] The hot melt mechanism 9 is arranged opposite to the fixed jig 5, and the fixed jig 5 is drivingly connected to the sliding assembly. The sliding assembly drives the tube body 58 on the fixed jig 5 to heat with the hot melt mechanism 9, and then performs hot melt assembly with the tube body 58 on the positioning jig 4;

[0031] The moving mechanism 7 is drivingly connected to the fixing frame 8, and the moving mechanism 7 is used to drive the fixing mechanism to move and switch positions.

[0032] The pressing assembly of the present invention presses and positions the valve body 3 on the positioning fixture 4, and the pressing assembly presses and positions the tube body 58 on the fixed fixture 5. The moving mechanism 7 drives the tube body 58 on the fixed mechanism to move to the hot melt mechanism 9. After the sliding assembly drives the tube body 58 on the fixed fixture 5 and the hot melt mechanism 9 to heat, the moving mechanism 7 drives the heated tube body 58 to move to the positioning mechanism 1 to be press-fitted and assembled with the valve body 3, thereby completing the press-fit installation of the valve body 3, the tube 59, and the pipe sleeve 591. The automation degree is high and the work efficiency is high. The pressing assembly and the pressing assembly press and position the valve body 3 and the tube body 58 respectively, so as to realize the precise positioning of the valve body 3 and the tube body 58 and prevent the valve body 3 and the tube body 58 from shifting in position during the pressing process. The assembly process is precisely controlled and the assembly efficiency is high.

[0033] In one embodiment of the present invention, the positioning fixture 4 includes a fixture block 41, the fixture block 41 is provided with a positioning inclined surface, the positioning inclined surface is provided with a positioning groove 42 matching the valve body 3, and the bottom surface of the positioning groove 42 is provided with a positioning hole 43 and an air suction hole 44.

[0034] In one embodiment of the present invention, the pressing assembly includes a pressing cylinder 2, which is arranged on a positioning frame 11. The pressing cylinder 2 is drivingly connected to the pressing frame 21, and the pressing frame 21 is slidably arranged on the guide rail of the positioning frame 11. A pressing block 22 is arranged on the pressing frame 21, and a contour surface 23 matching the valve body 3 is arranged on the pressing block 22. The valve body 3 is placed on the positioning groove 42, and the suction nozzle on the suction hole 44 generates negative pressure to adsorb the valve body 3. The pressing cylinder 2 drives the pressing block 22 to press and position the valve body 3 on the fixture plate, and the contour surface 23 on the pressing block 22 is pressed against the valve body 3, so as to quickly fix the position of the valve body 3, realize accurate positioning of the valve body 3, and prevent the valve body 3 from shifting in the pressed tube body 58. The contour surface 23 can be used to increase the clamping force of the valve body 3.

[0035] In one embodiment of the present invention, the fixing fixture 5 includes a fixing seat 51 and a movable seat 53, the tube body 58 includes a tube 59 and a tube sleeve 591, the fixing seat 51 is arranged on the fixing frame 8, the fixing seat 51 is provided with a supporting groove 52 for placing the free end of the tube 59, the movable seat 53 is slidably arranged on the fixing frame 8, the movable seat 53 is provided with a limiting groove 54 matching the supporting groove 52, the limiting groove 54 is provided with a limiting card groove 55, the outer side of the tube sleeve 591 is provided with a limiting protrusion 592 matching the limiting card groove 55, and the tube 59 is passed through the tube sleeve 591.

[0036] Specifically, the pipe sleeve 591 is placed in the limiting groove 54, the outer limiting protrusion 592 of the pipe sleeve 591 is clamped on the limiting clamping groove 55, the pipe groove is placed on the supporting groove 52 of the fixing seat 51, and one end of the pipe 59 is passed through the pipe sleeve 591 and abutted against the reference plate 62. The pipe 59 and the pipe sleeve 591 are pressed together in steps, which can effectively ensure the pressing accuracy of the valve body 3, the pipe 59, and the pipe sleeve 591.

[0037] The sliding cylinder 57 drives the sleeve 591 on the movable seat 53 to move toward the valve body 3, so that the sleeve 591 is sleeved on the pipe 59 and the valve body 3, thereby completing the press-fit installation of the valve body 3, the pipe 59, and the sleeve 591, with a high degree of automation and high work efficiency.

[0038] In one embodiment of the present invention, the clamping assembly includes a clamping cylinder 81, which is driven and connected to a clamping block 82. The clamping block 82 is provided with a clamping block 83 matching the tube body 58, and the clamping block 83 is provided with a clamping groove. The clamping cylinder 81 drives the clamping block 83 to clamp and position the tube body 58 on the fixing fixture 5, which can avoid positional deviation of the tube 59 when it is moved, hot-melted and pressed on the valve body 3, thereby improving the pressing accuracy of the tube 59.

[0039] In one embodiment of the present invention, the sliding assembly includes a sliding cylinder 57, which is arranged on the fixed frame 8. The sliding cylinder 57 is drivingly connected to the moving seat 53. The fixed frame 8 is provided with a sliding rail 56, and the moving seat 53 is slidably arranged on the sliding rail 56.

[0040] In one embodiment of the present invention, the hot melt mechanism 9 includes a hot melt 92, and the hot melt 92 is arranged on a hot melt frame 91, and a hot melt rod 93 is arranged on the hot melt 92. The hot melt frame 91 is slidably arranged on a guide frame 94, and a guide cylinder 95 is arranged on the guide frame 94. The guide cylinder 95 is drivingly connected to the hot melt frame 91, and the moving module 71 drives the fixed mechanism loaded with the tube body 58 to move to the hot melt mechanism 9, and the guide cylinder 95 drives the hot melt 92 on the hot melt frame 91 to move toward the tube body 58. The hot melt rod 93 on the hot melt 92 heats the pipe sleeve 591 and the pipe 59 for a period of time, which greatly improves the production efficiency and effectively reduces the production cost.

[0041] Specifically, the movable module 71 drives the fixed mechanism loaded with the tube body 58 to move to the hot melt mechanism 9, and the guide cylinder 95 drives the hot melter 92 on the hot melt rack 91 to move toward the tube body 58, and the hot melt rod 93 on the hot melter 92 heats the tube sleeve 591 and the tube 59 for a period of time.

[0042] In one embodiment of the present invention, the moving mechanism 7 includes a moving module 71 , the moving module 71 is drivingly connected to a moving plate 72 , the fixing mechanism is arranged on the moving plate 72 , and both sides of the moving plate 72 are slidably arranged on moving rails 73 .

[0043] Specifically, the movable module 71 drives the fixing mechanism on the movable plate 72 to move to the limiting mechanism 6, the hot melt mechanism 9 and the positioning mechanism 1, so as to realize the position switching of the tube body 58 on the fixing mechanism, realize the automated assembly production process of the valve body 3, and the assembly process is precisely controlled and the assembly efficiency is high.

[0044] In one embodiment of the present invention, a limiting mechanism 6 is further included, and the limiting mechanism 6 is arranged opposite to the fixing mechanism. The limiting mechanism 6 includes a limiting frame 61, and a reference plate 62 is arranged on the limiting frame 61. The limiting frame 61 is slidably arranged on a guide bracket 63, and a limiting cylinder 64 is arranged on the guide bracket 63. The limiting cylinder 64 is drivingly connected to the limiting frame 61.

[0045] Specifically, the movable module 71 drives the fixed mechanism on the movable plate 72 to move to the limit mechanism 6, and the limit cylinder 64 drives the reference plate 62 on the limit frame 61 to move to a suitable position. One end of the pipe 59 passes through the pipe sleeve 591 and abuts against the reference plate 62, so that the pipe 59 can extend one end to a certain distance to be pressed together with the valve body 3 first, thereby ensuring the extended position of each pipe 59, improving the subsequent installation consistency with the valve body 3, and improving the pressing accuracy.

[0046] In one embodiment of the present invention, the positioning mechanism 1 is disposed on an adjustment plate 12 , the adjustment plate 12 is slidably disposed on an adjustment frame 13 , an adjustment cylinder 14 is disposed on the adjustment frame 13 , and the adjustment cylinder 14 is drivingly connected to the adjustment plate 12 .

[0047] Specifically, the adjustment cylinder 14 drives the positioning mechanism 1 on the adjustment plate 12 to move toward the direction of the tube 59, so that the valve body 3 on the fixture block 41 and the tube 59 are pressed and connected for a period of time. After the tube 59 is pressed and connected, the tube 59 and the pipe sleeve 591 are pressed in steps, which can effectively ensure the pressing accuracy of the valve body 3, the tube 59, and the pipe sleeve 591 and ensure product quality.

[0048] Usage process

[0049] The valve body 3 is placed on the positioning groove 42, and the suction nozzle on the suction hole 44 generates negative pressure to absorb the valve body 3. The pressing cylinder 2 drives the pressing block 22 to press and position the valve body 3 on the fixture plate. The contoured surface 23 on the pressing block 22 is pressed against the valve body 3. The moving module 71 drives the fixing mechanism on the moving plate 72 to move to the limiting mechanism 6. The limiting cylinder 64 drives the reference plate 62 on the limiting frame 61 to move to a suitable position, and the pipe sleeve 591 is placed in the limiting groove 54. The outer limiting protrusion 592 of the pipe sleeve 591 is clamped on the limiting clamping groove 55. The pipe groove is placed on the supporting groove 52 of the fixing seat 51, and one end of the pipe 59 is passed through the pipe sleeve 591 to abut against the reference plate 62, so as to improve the pressing efficiency of the pipe body 58 and make each pipe body 58 consistent with the requirements. The pressing cylinder 81 drives the pressing block 83 to press and position the pipe body 58 on the fixed fixture 5 On the top, the moving module 71 drives the fixing mechanism loaded with the tube body 58 to move to the hot melt mechanism 9, the guide cylinder 95 drives the hot melt 92 on the hot melt rack 91 to move toward the tube body 58, and the hot melt rod 93 on the hot melt 92 heats the pipe sleeve 591 and the pipe 59 for a period of time. Then, the moving module 71 drives the fixing mechanism loaded with the tube body 58 to move to the positioning mechanism 1, and the adjustment cylinder 14 drives the positioning mechanism 1 on the adjustment plate 12 to move toward the pipe 59, so that the valve body 3 on the fixture block 41 and the pipe 59 are pressed and connected for a period of time. After the pressing and connection of the pipe 59 is completed, the sliding cylinder 57 drives the pipe sleeve 591 on the moving seat 53 to move toward the valve body 3, so that the pipe sleeve 591 is sleeved on the pipe 59 and the valve body 3, thereby completing the pressing installation of the valve body 3, the pipe 59, and the pipe sleeve 591, with a high degree of automation and high work efficiency.

[0050] The above-described embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or changes made by those skilled in the art based on the present invention are within the protection scope of the present invention. The protection scope of the present invention shall be subject to the claims.

Claims

1. An automatic cannula assembly device, characterized in that: include: The positioning mechanism comprises a positioning frame, on which a positioning fixture for positioning the valve body is arranged, and above the positioning fixture is a material pressing assembly, which is used to press the valve body tightly and position it on the positioning fixture; A fixing mechanism is arranged opposite to the positioning fixture, the fixing mechanism comprises a fixing frame, a fixing fixture for loading the tube body is slidably arranged on the fixing frame, a pressing assembly is arranged on the fixing frame, and the pressing assembly is used to press the tube body and position it on the fixing fixture; The hot melt mechanism is arranged opposite to the fixed fixture, the fixed fixture is drivingly connected to the sliding component, the sliding component drives the tube body on the fixed fixture to heat the hot melt mechanism, and then performs hot melt assembly with the tube body on the positioning fixture; The moving mechanism is drivingly connected to the fixing frame, and the moving mechanism is used to drive the fixing mechanism to move and switch positions.

2. The automatic cannula assembly device according to claim 1, characterized in that: The positioning fixture comprises a fixture block, the fixture block is provided with a positioning inclined surface, the positioning inclined surface is provided with a positioning groove matching the valve body, and the bottom surface of the positioning groove is provided with a positioning hole and an air suction hole.

3. The automatic cannula assembly device according to claim 1, characterized in that: The pressing assembly includes a pressing cylinder, which is arranged on a positioning frame. The pressing cylinder is drivingly connected to the pressing frame, and the pressing frame is slidably arranged on the guide rail of the positioning frame. A pressing block is arranged on the pressing frame, and a contoured surface matching the valve body is arranged on the pressing block.

4. The automatic cannula assembly device according to claim 1, characterized in that: The fixing fixture comprises a fixing seat and a moving seat, the tube body comprises a tube and a tube sleeve, the fixing seat is arranged on the fixing frame, the fixing seat is provided with a supporting groove for placing the free end of the tube, the moving seat is slidably arranged on the fixing frame, the moving seat is provided with a limiting groove matching the supporting groove, the limiting groove is provided with a limiting card groove, the outer side of the tube sleeve is provided with a limiting protrusion matching the limiting card groove, and the tube is passed through the tube sleeve.

5. The automatic cannula assembly device according to claim 1, characterized in that: The clamping assembly includes a clamping cylinder, which is drivingly connected to a clamping block. The clamping block is provided with a clamping block matching the tube body, and a clamping groove is provided on the clamping block. The clamping cylinder drives the clamping block to clamp the tube body and position it on the fixing fixture.

6. The automatic cannula assembly device according to claim 4, characterized in that: The sliding assembly comprises a sliding cylinder, the sliding cylinder is arranged on the fixed frame, the sliding cylinder is drivingly connected to the moving seat, the fixed frame is provided with a sliding rail, and the moving seat is slidably arranged on the sliding rail.

7. The automatic cannula assembly device according to claim 1, characterized in that: The hot melt mechanism comprises a hot melter, which is arranged on a hot melt frame, on which a hot melt rod is arranged, and the hot melt frame is slidably arranged on a guide frame, on which a guide cylinder is arranged, and the guide cylinder is drivingly connected to the hot melt frame.

8. The automatic cannula assembly device according to claim 1, characterized in that: The moving mechanism comprises a moving module, the moving module is drivingly connected to the moving plate, the fixing mechanism is arranged on the moving plate, and both sides of the moving plate are slidably arranged on the moving track.

9. The automatic cannula assembly device according to claim 1, characterized in that: It also includes a limiting mechanism, which is arranged opposite to the fixing mechanism. The limiting mechanism includes a limiting frame, a reference plate is arranged on the limiting frame, the limiting frame is slidably arranged on a guide bracket, a limiting cylinder is arranged on the guide bracket, and the limiting cylinder is drivingly connected to the limiting frame.

10. The automatic cannula assembly device according to claim 1, characterized in that: The positioning mechanism is arranged on an adjustment plate, the adjustment plate is slidably arranged on an adjustment frame, an adjustment cylinder is arranged on the adjustment frame, and the adjustment cylinder is drivingly connected to the adjustment plate.