A down-tightening assembly for a hemoperfusion screwing device

Abstract

This utility model discloses a downward tightening assembly for a blood perfusion device tightening equipment, including a frame and a tightening mechanism. The tightening mechanism includes a second drive mechanism and an upper fixture, the upper fixture being adapted to the upper end cap of the perfusion device. The second drive mechanism drives the upper fixture to rotate, for tightening the end cap of the perfusion device. A downward tightening mechanism is disposed on the upper end of the frame, including a third drive mechanism and a sliding platform. The third drive mechanism is fixedly connected to the frame, and the sliding platform is slidably connected to the frame, for guiding the sliding platform to slide only up and down. The tightening mechanism is connected to the sliding platform, and the third drive mechanism drives the sliding platform to slide up and down, for causing the tightening mechanism to move up and down with the sliding platform, thereby causing the upper fixture of the tightening mechanism to abut against or move away from the end cap of the perfusion device. In this utility model, the tightening force of both end caps of the perfusion device reaches a preset value, ensuring product consistency and a good sealing effect.

Description

Technical Field

[0001] This utility model relates to the field of perfusion device processing technology, and in particular to a pressure tightening component for a blood perfusion device tightening equipment. Background Technology

[0002] A hemoperfusion device is a medical device primarily used for blood purification therapy. It typically has a cylindrical structure containing a sterilized, coated absorbent. The outer shell of the perfusion device is made of plastic and includes upper and lower end caps, each with a small cap. A professional wrench is needed to unscrew the small caps counterclockwise during use. The end caps are usually connected to the device via threads. It is essential to ensure a secure and airtight connection between the end caps and the device, and the tightening force of the end caps must be greater than that of the small caps to prevent the end caps from opening when the small caps are removed.

[0003] Chinese utility model patent with publication number CN217345355U discloses an irrigation device tightening mechanism, which is equipped with a locking block frame and an end cap sleeve. In use, it is convenient to lock the irrigation device into the locking slot of the locking block frame, and then push the end cap to lock onto the end caps at both ends of the irrigation device. By rotating the end cap, the end caps at both ends of the irrigation device are tightened.

[0004] However, during the use of the aforementioned device, manual tightening is inefficient, and the tightening force cannot be precisely consistent, resulting in poor product consistency and sealing problems. If the end cap is not properly tightened, opening the cap will cause the end cap to open, rendering the device unusable. Furthermore, the production process of this device heavily relies on manual labor, resulting in long processing times for individual products and low production efficiency, making it difficult to meet the needs of large-scale production. Summary of the Invention

[0005] This invention aims to solve the problem in the prior art where the tightening force of the end caps of the irrigation device is inaccurate, resulting in poor product consistency or even poor sealing.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A pressure tightening assembly for a blood perfusion device tightening device includes a frame and further includes:

[0008] The tightening mechanism includes a second drive mechanism and an upper fixture. The upper fixture is adapted to the upper end cover of the irrigation device. The second drive mechanism drives the upper fixture to rotate for tightening the end cover of the irrigation device.

[0009] The pressing mechanism is located on the upper end of the frame. The pressing mechanism includes a third drive mechanism and a sliding platform. The third drive mechanism is fixedly connected to the frame, and the sliding platform is slidably connected to the frame. The sliding platform is used to guide the sliding platform to slide only up and down. The tightening mechanism is connected to the sliding platform. The third drive mechanism drives the sliding platform to slide up and down, so that the tightening mechanism moves up and down with the sliding platform, thereby causing the upper fixture of the tightening mechanism to abut against or move away from the end cap of the injector.

[0010] Preferably, the frame is a frame structure, including a first plate, a second plate and a third plate arranged in parallel from bottom to top. The first plate and the second plate are fixedly connected by a first support column, and the second plate and the third plate are fixedly connected by a second support column.

[0011] Preferably, the second drive mechanism and the upper fixture are connected by a flexible connector.

[0012] Preferably, the flexible connector includes a coaxial and upwardly extending sleeve disposed at the upper end of the upper fixture. The sleeve has an upward opening and vertically arranged sliding grooves on its front and rear walls. The sliding grooves are rounded rectangles. An upper fixture connecting shaft is slidably connected in the sliding grooves. A pin is disposed at the lower end of the upper fixture connecting shaft and slidably connected to the sliding groove. A spring is disposed at the bottom of the sliding groove inside the sleeve and arranged vertically. The upper end of the spring abuts against the lower end face of the upper fixture connecting shaft. A second driving mechanism drives the upper fixture connecting shaft to rotate.

[0013] Preferably, the third driving mechanism includes a pressing cylinder, which is fixed vertically on a third plate. A second through hole is provided in the middle of the third plate, and the piston rod of the pressing cylinder passes through the second through hole and is connected to the sliding platform for transmission.

[0014] Preferably, the sliding platform includes an upper support plate and a lower support plate arranged in parallel, and a plurality of guide shafts are arranged evenly in the vertical direction between the upper support plate and the lower support plate.

[0015] The second plate is fixed with a number of linear bearings corresponding to the guide shafts. The central axis of the linear bearings is arranged vertically, and the linear bearings are slidably connected to the corresponding guide shafts to guide the sliding platform to slide only up and down.

[0016] Preferably, the upper support plate is provided with a downward pressure buffer arranged in the vertical direction, which is used to provide buffering to reduce impact when the third drive mechanism presses the screwing mechanism down to a predetermined position and stops.

[0017] Preferably, the second plate is provided with a positioning shaft below the pressure buffer that cooperates with the pressure buffer. When the pressure cylinder drives the sliding platform to move downward to the predetermined position, the impact head of the pressure buffer directly contacts the positioning shaft to compensate for the insufficient stroke of the pressure buffer.

[0018] Preferably, the second drive mechanism includes a servo motor.

[0019] The beneficial effects of this utility model are:

[0020] 1. After positioning and fixing the irrigation device, send it into the position corresponding to the upper fixture. Then, the upper fixture moves downward to cooperate with the upper end cover of the irrigation device. The upper fixture is driven to rotate by the servo motor to tighten the upper end cover of the irrigation device. The servo motor can accurately control the tightening torque to ensure that the tightening force of the two end covers of the irrigation device reaches the preset value, ensuring product consistency and good sealing effect.

[0021] 2. A sleeve is installed at the upper end of the upper fixture. The sleeve has vertically oriented grooves on its front and rear walls. The upper fixture connecting shaft is slidably connected in the grooves. A pin is installed at the lower end of the upper fixture connecting shaft, which is slidably connected to the grooves. A spring is installed at the bottom of the groove inside the sleeve, which is arranged vertically. The upper end of the spring abuts against the lower end face of the upper fixture connecting shaft. This flexible connection of the upper fixture prevents hard contact between the irrigation device and the upper fixture, thus avoiding damage to the irrigation device. Attached Figure Description

[0022] Figure 1 This is a front view of Embodiment 1 of this utility model;

[0023] Figure 2 This is a schematic diagram of the frame three-dimensional structure in Embodiment 1 of this utility model;

[0024] Figure 3 This is a front view of the screwing mechanism in Embodiment 1 of this utility model;

[0025] Figure 4 This is a front view of the connection relationship between the pressing mechanism, the screwing mechanism, and part of the frame in Embodiment 1 of this utility model;

[0026] Figure 5 This is a front view of Embodiment 2 of this utility model;

[0027] Figure 6 This is a three-dimensional structural diagram of the feeding mechanism in Embodiment 2 of this utility model.

[0028] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Detailed Implementation

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0030] Example 1:

[0031] like Figures 1-4 As shown, a pressing and tightening assembly for a blood perfusion device includes a frame 4, a tightening mechanism 2, and a pressing mechanism 3.

[0032] The frame 4 is a frame structure, including a first plate 41, a second plate 42 and a third plate 43 arranged in parallel from bottom to top. The first plate 41 and the second plate 42 are fixedly connected by a first support column 44, and the second plate 42 and the third plate 43 are fixedly connected by a second support column 45.

[0033] The screwing mechanism 2 includes a second drive mechanism and an upper fixture 26. The second drive mechanism drives the upper fixture to rotate, which is used to drive the upper fixture to rotate and tighten the end cap of the irrigation device.

[0034] To reduce hard contact between the upper fixture and the irrigation device, which could damage the irrigation device, the second drive mechanism and the upper fixture are connected by a flexible connector.

[0035] In this embodiment, the screwing mechanism 2 includes an upper fixture 26 with its opening facing downwards. The upper fixture 26 is adapted to the upper end cover of the irrigation device. The flexible connector includes a sleeve 25 that is coaxially arranged and extends upwards at the upper end of the upper fixture 26. The sleeve 25 has an opening facing upwards and vertically arranged grooves 251 on its front and rear walls. The grooves 251 are rounded rectangles. An upper fixture connecting shaft 24 is slidably connected to the grooves 251. A pin 241 that is slidably connected to the grooves 251 is provided at the lower end of the upper fixture connecting shaft 24. A spring (not shown) arranged vertically is provided at the bottom of the groove inside the sleeve 25. The upper end of the spring abuts against the lower end face of the upper fixture connecting shaft 24. The second drive mechanism drives the upper fixture connecting shaft to rotate.

[0036] The second drive mechanism includes a servo motor 21, which drives the upper fixture connecting shaft to rotate.

[0037] Furthermore, the second drive mechanism also includes a reducer 22. The upper end of the upper fixture connecting shaft 24 is coaxially connected to the power output shaft of the reducer 22 via a coupling 23. A servo motor 21 is connected to the upper end of the reducer 22.

[0038] The pressing mechanism 3 includes a third drive mechanism and a sliding platform 35. The third drive mechanism is fixedly connected to the frame 4, and the sliding platform 35 is slidably connected to the frame 4 to guide the sliding platform 35 to slide only up and down. The sliding platform 35 is connected to the screwing mechanism 2. The third drive mechanism drives the sliding platform 35 to slide up and down, so that the screwing mechanism 2 moves up and down with the sliding platform 35, thereby causing the upper fixture 26 of the screwing mechanism 2 to abut against or move away from the upper end cover of the injector.

[0039] In this embodiment, the third driving mechanism includes a pressing cylinder 31, which is fixed vertically on a third plate 43. A second through hole 431 is provided in the middle of the third plate 43, and the piston rod of the pressing cylinder 31 passes through the second through hole 431 and is connected to the sliding platform 35 for transmission.

[0040] In this embodiment, the form of the third drive mechanism is not attached. Figure 1 Appendix Figure 5 As shown in the diagram, the third drive mechanism can also be an electric cylinder, which is limited to the downward-pressing cylinder 31.

[0041] The sliding platform 35 includes an upper support plate 351 and a lower support plate 353 arranged parallel to each other. A plurality of guide shafts 352 are arranged evenly in the vertical direction between the upper support plate 351 and the lower support plate 353. The pressing mechanism 3 also includes a plurality of linear bearings 34 corresponding to the number of guide shafts 352. The central axis of the linear bearings 34 is fixed in the vertical direction on the second plate 42. The linear bearings 34 are slidably connected to the corresponding guide shafts 352 to guide the sliding platform 35 to slide only up and down.

[0042] To facilitate the connection between the screwing mechanism 2 and the sliding platform 35, the reducer 22 is fixed vertically on the lower support plate 353. The second plate 42 has a first through hole 422 in the middle. The screwing mechanism 2 passes through the first through hole 422 to avoid interference with the frame 4 when the screwing mechanism 2 moves up and down.

[0043] In order to reduce the impact during the pressing process, the upper support plate 351 is provided with a pressing buffer 32 arranged in the vertical direction, which is used to provide buffering to reduce the impact when the third drive mechanism presses the screwing mechanism 2 down to a predetermined position and stops.

[0044] To compensate for the insufficient stroke of the pressure buffer 32, the second plate 42 is provided with a positioning shaft 33 that cooperates with the pressure buffer 32 below it. When the pressure cylinder 31 drives the sliding platform to move downward to the predetermined position, the impact head of the pressure buffer 32 directly contacts the positioning shaft 33 to provide buffering and reduce impact.

[0045] The working principle of this utility model is as follows:

[0046] First, the irrigation device is positioned and fixed vertically and then sent to the position corresponding to the lower end of the upper fixture 26 in the screwing mechanism.

[0047] Secondly, the pressing cylinder 31 drives the sliding platform 35 to slide downwards. With the cooperation of several linear bearings 34 and guide shafts 352, the sliding platform 35 slides up and down only along the central axis of the linear bearings 34. At the same time, the screwing mechanism 2 also slides downwards with the sliding platform 35. When the upper fixture 26 is about to contact the flow injector at the predetermined position, the pressing buffer 32 bumper and the positioning shaft 33 contact to provide buffering to reduce the impact during the pressing process.

[0048] In addition, since a spring is provided at the bottom of the internal groove of the sleeve 25, and the upper end of the spring abuts against the lower end face of the upper fixture connecting shaft 24, when the upper fixture 26 contacts the upper end cover of the irrigation device, the spring is compressed and the sleeve 25 slides upward along the upper fixture connecting shaft 24, thereby preventing the irrigation device and the upper fixture 26 from making hard contact and avoiding damage to the irrigation device.

[0049] Next, the servo motor 21 is started. The rotational power of the servo motor 21 is transmitted sequentially through the reducer 22, coupling 23, upper fixture connecting shaft 24, and sleeve 25 to the upper fixture 26, ultimately driving the upper fixture 26 to rotate. The upper fixture 26 then tightens the upper end cap of the injector. The torque provided by the servo motor 21 during the tightening process can be set and adjusted with high precision according to different product specifications, thus ensuring the consistency of tightening for products of the same specifications.

[0050] Finally, when the torque provided by the servo motor 21 reaches the predetermined value, it stops rotating. Then, the pressing cylinder 31 drives the sliding platform 35 to slide upward, which in turn drives the screwing mechanism 2 to slide upward along with the sliding platform 35, and the upper fixture 26 disengages from the upper end cover of the injector.

[0051] Example 2:

[0052] This embodiment also discloses a blood perfusion device tightening device, including a feeding mechanism 1 and the downward tightening assembly in Embodiment 1.

[0053] The feeding mechanism 1 includes a first drive mechanism and a feeding platform. A lower fixture 14 is provided on the feeding platform for positioning and clamping the irrigation device. The first drive mechanism drives the feeding platform to reciprocate between the loading point and the position corresponding to the twisting mechanism 2.

[0054] In this embodiment, the first driving mechanism is arranged on the first plate 41 in the left-right direction. The feeding platform includes a feeding plate 15 arranged parallel to the first plate 41. Two linear guide rails 17 extending in the left-right direction are provided below the feeding plate. The linear guide rails 17 are fixed on the first plate 41 in parallel front and back to guide the feeding plate 15 to slide only in the direction of the linear guide rails 17. A lower fixture pad plate 16 is detachably fixedly connected to the upper end face of the feeding plate 15. A lower fixture 14 with an upward opening is fixedly connected to the lower fixture pad plate 16. The lower fixture 14 is adapted to the lower end cover of the irrigation device.

[0055] The first drive mechanism includes a feeding cylinder 11, which is fixed on the first plate 41 in the left-right direction. The piston rod of the feeding cylinder 11 is connected to the feeding plate 15 through a floating joint 12.

[0056] To reduce the impact when the feed plate stops, the linear guide 17 is provided with a feed buffer 13 that cooperates with the feed plate 15 on the side near the feed cylinder 11. This buffer is used to reduce the impact when the first drive mechanism stops the feed plate 15 at a predetermined position.

[0057] The buffer, cylinder, servo motor, and control logic are all existing technologies and are not related to this utility model, so they will not be described in detail here.

[0058] The above embodiments are only used to illustrate and not limit the technical solutions of this utility model. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the utility model without departing from the spirit and scope of the utility model. Any modifications or partial substitutions should be covered within the scope of the claims of this utility model.

[0059] If the terms "first" or "second" are used in this document to define the components, those skilled in the art should know that the use of "first" or "second" is merely for the convenience of describing this utility model and simplifying the description, and unless otherwise stated, the above terms have no special meaning.

[0060] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0061] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0062] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A pressure tightening assembly for a blood perfusion device tightening device, comprising a frame, characterized in that, Also includes: The tightening mechanism includes a second drive mechanism and an upper fixture. The upper fixture is adapted to the upper end cover of the irrigation device. The second drive mechanism drives the upper fixture to rotate for tightening the end cover of the irrigation device. The pressing mechanism is located on the upper end of the frame. The pressing mechanism includes a third drive mechanism and a sliding platform. The third drive mechanism is fixedly connected to the frame, and the sliding platform is slidably connected to the frame. The sliding platform is used to guide the sliding platform to slide only up and down. The tightening mechanism is connected to the sliding platform. The third drive mechanism drives the sliding platform to slide up and down, so that the tightening mechanism moves up and down with the sliding platform, thereby causing the upper fixture of the tightening mechanism to abut against or move away from the end cap of the injector.

2. The pressing and tightening assembly for a blood perfusion device tightening device as described in claim 1, characterized in that, The frame is a frame structure, including a first plate, a second plate and a third plate arranged in parallel from bottom to top. The first plate and the second plate are fixedly connected by a first support column, and the second plate and the third plate are fixedly connected by a second support column.

3. The pressing and tightening assembly for a blood perfusion device tightening device as described in claim 1, characterized in that, The second drive mechanism and the upper fixture are connected by a flexible connector.

4. The pressing and tightening assembly for a blood perfusion device tightening device as described in claim 3, characterized in that, The flexible connector includes a coaxial and upwardly extending sleeve at the upper end of the upper fixture. The sleeve has an upward opening and vertically arranged sliding grooves on its front and rear walls. The sliding grooves are rounded rectangles. An upper fixture connecting shaft is slidably connected in the sliding grooves. A pin is provided at the lower end of the upper fixture connecting shaft and is slidably connected to the sliding groove. A spring is provided at the bottom of the sliding groove inside the sleeve and arranged vertically. The upper end of the spring abuts against the lower end face of the upper fixture connecting shaft. A second driving mechanism drives the upper fixture connecting shaft to rotate.

5. The pressing and tightening assembly for a blood perfusion device tightening device as described in claim 2, characterized in that, The third driving mechanism includes a pressing cylinder, which is fixed vertically on a third plate. A second through hole is provided in the middle of the third plate, and the piston rod of the pressing cylinder passes through the second through hole and is connected to the sliding platform for transmission.

6. The pressing and tightening assembly for a blood perfusion device tightening device as described in claim 2, characterized in that, The sliding platform includes an upper support plate and a lower support plate arranged in parallel, and a plurality of guide shafts are arranged evenly in the vertical direction between the upper support plate and the lower support plate. The second plate is fixed with a number of linear bearings corresponding to the guide shafts. The central axis of the linear bearings is arranged vertically, and the linear bearings are slidably connected to the corresponding guide shafts to guide the sliding platform to slide only up and down.

7. The pressing and tightening assembly for a blood perfusion device tightening device as described in claim 6, characterized in that, The upper support plate is provided with a downward pressure buffer arranged in the vertical direction, which is used to provide buffering when the third drive mechanism presses the screwing mechanism down to a predetermined position and stops.

8. The pressing and tightening assembly for a blood perfusion device tightening device as described in claim 7, characterized in that, The second plate is provided with a positioning shaft below the pressure buffer that cooperates with the pressure buffer. When the pressure cylinder drives the sliding platform to move downward to the predetermined position, the impact head of the pressure buffer directly contacts the positioning shaft to compensate for the insufficient stroke of the pressure buffer.

9. A pressure tightening assembly for a blood perfusion device tightening device as described in any one of claims 1-8, characterized in that, The second drive mechanism includes a servo motor.

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