Potting tooling

Abstract

The embodiment of the utility model relates to the technical field of medical devices, and discloses a potting tool, including: an upper fixing frame, used to fix the outer shell of the device to be potted, and the height of the upper fixing frame is less than the height of the outer shell of the device to be potted. A lower fixing frame, connected to the upper fixing frame, having a potting channel, the potting channel is used to connect to the inside of the outer shell of the device to be potted, and to introduce the potting glue into the inside of the outer shell of the device to be potted. A limiting member is fixed to the lower fixing frame and extends into the outer shell of the device to be potted, and the limiting member is used to limit and fix the parts of the device to be potted in the outer shell of the device to be potted. Using the potting tool provided by the embodiment of the utility model can simplify the assembly process of the device to be potted and improve production efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of potting equipment, in particular to a potting tool. Background Art

[0002] In the treatment of heart disease, when the patient's heart pumping capacity decreases, a fixed-blade catheter pump is usually placed into the patient's body through a trans-aortic valve intervention to assist blood circulation. Due to the small diameter of the axillary artery, in order to ensure the smooth implantation of the blood pump, the blood pump needs to meet a certain degree of miniaturization and lightweight design, and also needs to be able to withstand a certain impact force. Therefore, potting technology is generally used as a process procedure for product production and assembly.

[0003] However, existing potting tooling has design defects, resulting in a cumbersome assembly process and low production efficiency. Utility Model Content

[0004] The utility model aims to provide a potting tool, which can simplify the assembly process of the device to be potted and improve the production efficiency.

[0005] In order to solve the above technical problems, the embodiment of the utility model provides a potting tool, including:

[0006] An upper fixing frame is used to fix the shell of the device to be potted, and the height of the upper fixing frame is smaller than the height of the shell; a lower fixing frame is connected to the upper fixing frame and has a perfusion channel, and the perfusion channel is used to communicate with the inside of the shell of the device to be potted and introduce the potting glue into the inside of the shell; a limiting member is fixed to the lower fixing frame and extends into the shell, and the limiting member is used to limit and fix the blood pump parts in the shell of the device to be potted.

[0007] Compared with the prior art, the potting tool provided by the embodiment of the utility model includes an upper fixing frame, a lower fixing frame and a limiter. Among them, the upper fixing frame is used to fix the shell of the device to be potted, the limiter is fixed to the lower fixing frame and is used to extend into the shell of the device to be potted to limit and fix the parts of the device to be potted, and the lower fixing frame has a potting channel, which is used to connect the inside of the shell of the device to be potted and introduce the potting glue into the shell. When the potting glue is poured, the potting glue flows from the bottom to the top of the potting channel of the lower fixing frame into the shell of the device to be potted, which can ensure that the potting glue fills the inside of the shell and avoids the situation where there is no potting glue bonding in some positions. Since the height of the upper fixing frame is less than the height of the shell, when the potting glue overflows from the opening at the top of the shell, the overflowed potting glue can be directly removed, and the potting glue will not enter the gap between the shell and the upper fixing frame, reducing the steps of cleaning the overflow glue on the potting tool in the later stage, so that the shell can be smoothly separated from the upper fixing frame, simplifying the assembly process of the device to be potted, and improving production efficiency.

[0008] Optionally, the upper fixing frame includes a fixing portion and a connecting portion, the connecting portion is fixedly connected to the outer periphery of the fixing portion and extends radially along the fixing portion, and the connecting portion is used to connect to the lower fixing frame; the fixing portion has a receiving hole for accommodating the outer shell of the device to be encapsulated, and the axial height of the fixing portion is smaller than the axial height of the outer shell of the device to be encapsulated.

[0009] Optionally, it also includes an assembly base plate, the assembly base plate has a positioning pin and a first limiting hole, the connecting portion has a positioning hole, the lower fixing frame has a second limiting hole, the positioning pin cooperates with the positioning hole to fix the upper fixing frame on the assembly base plate, and the assembly base plate and the lower fixing frame are fixedly connected by positioning pieces that extend into the second limiting hole and the first limiting hole in turn.

[0010] Optionally, it further includes a base, the base has a positioning groove, the assembly base plate is partially located in the positioning groove, and the base supports and positions the assembly base plate.

[0011] Optionally, a fixing member is further included, the fixing portion has a fixing hole extending radially and connected to the accommodating hole, and the fixing member extends into the fixing hole to abut and fix the shell of the device to be potted along the radial direction.

[0012] Optionally, the perfusion channel comprises an input section and a reduced diameter section which are connected to each other, and the input section is connected to the interior of the housing of the device to be potted via the reduced diameter section.

[0013] Optionally, the lower fixing frame includes a mounting portion and a perfusion portion fixedly connected to the mounting portion, the mounting portion is fixedly connected to the upper fixing frame, and the perfusion portion is provided with the perfusion channel; the perfusion portion is also provided with a placement groove that accommodates the limiting member and is connected to the perfusion channel, and the extension direction of the placement groove is the same as the extension direction of the perfusion channel.

[0014] Optionally, the pouring part has a connecting head in the shape of an annular column, the connecting head has an input through hole connected to the pouring channel, and the outer diameter of the connecting head decreases from the mounting part in the direction away from the upper fixing frame; the input through hole is used to connect the tail pipe for conveying the potting glue.

[0015] Optionally, the connector is provided with a circumferentially extending fastening protrusion, and an outer diameter of the fastening protrusion decreases from the mounting portion toward a direction away from the upper fixing frame.

[0016] Optionally, the limiting member and the lower fixing frame are both plastic members with smooth surfaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0018] Figure 1 It is a top view schematic diagram of the potting tool provided by the embodiment of the utility model;

[0019] Figure 2 It is a bottom view schematic diagram of the potting tool provided by the embodiment of the utility model;

[0020] Figure 3 The potting tool provided by the embodiment of the utility model is Figure 2 Schematic cross-sectional view of line AA';

[0021] Figure 4 This is a schematic diagram of a working state of a potting tool provided by an embodiment of the utility model;

[0022] Figure 5 yes Figure 4 A magnified schematic diagram of the middle area A;

[0023] Figure 6 yes Figure 4 A magnified schematic diagram of the middle area B;

[0024] Figure 7 This is another working state schematic diagram of the potting tool provided in the embodiment of the utility model. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the utility model clearer, the various embodiments of the utility model will be described in detail below with reference to the accompanying drawings. However, it can be understood by those skilled in the art that in the various embodiments of the utility model, many technical details are provided in order to enable readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical schemes claimed for protection in the claims of the present application can be implemented.

[0026] In the embodiments of the present invention, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0027] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in this utility model can be understood according to specific circumstances.

[0028] In addition, the terms "installed", "set", "provided with", "opened", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0029] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0030] The implementation details of the potting tooling of this embodiment are specifically described below. The following content is only provided for easy understanding of the implementation details and is not necessary for implementing this solution.

[0031] In this embodiment, the device to be potted is a blood pump for illustration. By using the potting tool 100 provided in this embodiment, the assembly process of the blood pump can be simplified and the production efficiency can be improved. It is understandable that the device to be potted can also be other devices, which will not be described in detail in this embodiment.

[0032] See also Figures 1 to 7 A potting tool 100 according to an embodiment of the utility model includes: an upper fixing frame 110, which is used to fix the housing 200 of the blood pump, and the height of the upper fixing frame 110 is less than the height of the housing 200; a lower fixing frame 120, which is connected to the upper fixing frame 110 and has a potting channel 121, and the potting channel 121 is used to communicate with the interior of the housing 200 and introduce the potting glue into the interior of the housing 200; a limiting member 130, which is fixed to the lower fixing frame 120 and extends into the housing 200, and the limiting member 130 is used to limit and fix the blood pump parts 300 in the housing 200.

[0033] With such arrangement, when pouring the potting glue, the potting glue flows from the pouring channel 121 of the lower fixing frame 120 into the interior of the shell 200 from bottom to top, which can ensure that the potting glue fills the interior of the shell 200 and avoids the situation where some positions in the shell 200 are not bonded with the potting glue. Since the height of the upper fixing frame 110 is less than the height of the shell 200, when the potting glue overflows from the opening at the top of the shell 200, the overflowed potting glue can be directly removed, and the potting glue will not enter the gap between the shell 200 and the upper fixing frame 110, thereby reducing the steps of cleaning the overflowed glue on the potting tool 100 at a later stage, so that the shell 200 can be smoothly separated from the upper fixing frame 110, simplifying the assembly process of the blood pump and improving production efficiency.

[0034] It is understandable that the blood pump component 300 includes a coil 310 and a bearing 320. By injecting the potting glue into the interior of the housing 200, the coil 310 and the bearing 320 are fixed inside the housing 200, so that the internal structure of the blood pump has sufficient stability and sealing.

[0035] In this embodiment, the limiting member 130 can extend from the lower fixing frame 120 to extend out of the top opening of the outer shell 200. In this way, in addition to limiting and fixing the coil 310 and the bearing 320, the limiting member 130 can also, to a certain extent, drain the potting glue injected into the outer shell 200.

[0036] In this embodiment, the upper fixing frame 110 includes a fixing portion 111 and a connecting portion 112, wherein the connecting portion 112 is fixedly connected to the outer periphery of the fixing portion 111 and extends in the radial direction of the fixing portion 111, and the connecting portion 112 is used to connect the lower fixing frame 120. The fixing portion 111 has an accommodating hole 1111 for accommodating the housing 200, and the axial height of the fixing portion 111 is less than the axial height of the housing 200.

[0037] Specifically, the fixing portion 111 may be an annular cylindrical shape, and the connecting portion 112 may be an annular circular plate, wherein the inner diameter of the connecting portion 112 is equal to the outer diameter of the fixing portion 111, and the inner periphery of the connecting portion 112 is fixedly connected to the outer periphery of one end of the fixing portion 111. Alternatively, the fixing portion 111 and the connecting portion 112 may be integrally provided. The accommodating hole 1111 of the fixing portion 111 extending axially is used to accommodate the shell 200, and the axial dimension of the fixing portion 111 is smaller than the axial dimension of the shell 200. When the potting glue overflows, the potting glue opens at the top of the shell 200 instead of in the accommodating hole 1111 of the fixing portion 111. Therefore, the potting glue will not enter the gap between the shell 200 and the fixing portion 111, thereby preventing the potting glue that enters the gap between the shell 200 and the fixing portion 111 from entering the shell 200 and the fixing portion 111 and bonding them together after curing during subsequent processing, thereby ensuring that the shell 200 is smoothly separated from the fixing portion 111 and reducing the steps of removing residual glue on the fixing portion 111.

[0038] In this embodiment, the potting tool 100 further includes a fixing member 1113 , the fixing portion 111 has a fixing hole 1112 extending radially and connected to the accommodating hole 1111 , and the fixing member 1113 extends into the fixing hole 1112 to abut and fix the housing 200 along the radial direction.

[0039] In order to ensure that the housing 200 maintains a stable position during the process of pouring the potting glue, the fixing hole 1112 is opened on the side wall of the fixing portion 111, and the fixing member 1113 is inserted into the fixing hole 1112 to fix the housing 200. Specifically, the fixing hole 1112 can be a screw hole with a thread, and the fixing member 1113 can be a bolt. The bolt is screwed into the screw hole until the bolt abuts against the housing 200, and the housing 200 can be fixed by the bolt. It can be understood that when the device to be potted is a device other than a blood pump, the receiving hole 1111 can be set to other sizes and shapes. In other embodiments, the potting tool 100 also includes a filling piece (not shown in the figure), and the accommodating hole 1111 can be set to a larger size. The filling piece is placed in the accommodating hole 1111, and by setting different shapes and sizes of the filling pieces, different numbers and shapes of filling pieces can be used to form spaces of different sizes and shapes in the accommodating hole 1111 to meet the fixing requirements of different potting tools to be potted.

[0040] In this embodiment, the potting tool 100 also includes an assembly base plate 140, the assembly base plate 140 has a positioning pin 141 and a first limiting hole 142, the connecting portion 112 has a positioning hole 1121, and the lower fixing frame 120 has a second limiting hole 122. The positioning pin 141 cooperates with the positioning hole 1121 to fix the upper fixing frame 110 on the assembly base plate 140, and the assembly base plate 140 and the lower fixing frame 120 are fixedly connected by positioning parts that extend into the second limiting hole 122 and the first limiting hole 142 in turn.

[0041] It is understandable that after the connection portion 112 and the assembly base plate 140 are positioned through the positioning hole 1121 and the positioning pin 141, they can also be fixed using a positioning member. The specific setting method can refer to the setting method of the lower fixing frame 120 and the assembly base plate 140, which will not be repeated here. In some embodiments, the first limiting hole 142 and the second limiting hole 122 are threaded holes, and the positioning member is a bolt. In other embodiments, the positioning member can also be a rivet.

[0042] Furthermore, the assembly base plate 140 is provided with a limiting through hole 143, and the lower fixing frame 120 partially extends into the limiting through hole 143, thereby limiting the position of the lower fixing frame 120. In this way, by providing the positioning pin 141 on the assembly base plate 140, and providing the positioning hole 1121 on the connecting portion 112, the connecting portion 112 is positioned by using the cooperation of the positioning pin 141 and the positioning hole 1121, thereby positioning the upper fixing frame 110, and simultaneously positioning the lower fixing frame 120 by using the limiting through hole 143, it is possible to ensure that the upper fixing frame 110 and the lower fixing frame 120 are accurately aligned, thereby ensuring that the limiting member 130 passes through the housing 200, and avoiding interference between the limiting member 130 and the housing 200.

[0043] It is understandable that, in order to prevent the upper fixing frame 110 from rotating relative to the assembly base plate 140 , the positioning pin 141 may be configured as a prism, and the positioning hole 1121 may be configured as a hole matching the positioning pin 141 .

[0044] In this embodiment, the potting tool 100 further includes a base 150, the base 150 has a positioning groove 151, the assembly base 140 is partially located in the positioning groove 151, and the base 150 supports and positions the assembly base 140. For example, the base 150 may be an annular column, and an annular positioning groove 151 is provided at the top of the base 150 near the inner edge, and a portion of the assembly base 140 is embedded in the positioning groove 151.

[0045] In this embodiment, the lower fixing frame 120 includes a mounting portion 123 and a perfusion portion 124 fixedly connected to the mounting portion 123, the mounting portion 123 is fixedly connected to the upper fixing frame 110, and the perfusion portion 124 is provided with the perfusion channel 121. The perfusion portion 124 is also provided with a placement groove 1241 that accommodates the limiting member 130 and communicates with the perfusion channel 121, and the extension direction of the placement groove 1241 is the same as the extension direction of the perfusion channel 121. Specifically, the perfusion portion 124 extends in a direction away from the upper fixing frame 110. It can be understood that the mounting portion 123 is provided with the second limiting hole 122, and the mounting portion 123 is fixedly connected to the upper fixing frame 110 via the assembly base plate 140.

[0046] like Figure 5 As shown, in this embodiment, the perfusion channel 121 includes an input section 1211 and a reduced diameter section 1212 that are interconnected, and the input section 1211 is connected to the interior of the housing 200 via the reduced diameter section 1212. Specifically, the input section 1211 has a larger inner diameter, which can increase the flow rate of the potting glue, and the inner diameter of the reduced diameter section 1212 is smaller than the inner diameter of the input section 1211, so that the potting glue can be slowly injected into the interior of the housing 200, ensuring that the potting glue completely fills the interior of the housing 200, avoiding the existence of "empty glue" parts in the housing 200, that is, avoiding that some positions that need to be sealed are not filled with the potting glue, thereby ensuring the sealing of the blood pump.

[0047] In this embodiment, the pouring portion 124 has a connecting head 1242 in the shape of a circular column, and the connecting head 1242 has an input through hole 1243 connected to the pouring channel 121. The outer diameter of the connecting head 1242 decreases from the mounting portion 123 in a direction away from the upper fixing frame 110, and the input through hole 1243 is used to connect the tail pipe 160 for conveying the potting glue. By setting the outer diameter of the connecting head 1242 to decrease from the mounting portion 123 in a direction away from the upper fixing frame 110, the tail pipe can be more easily sleeved and fixed on the connecting head 1242.

[0048] like Figure 6 As shown, further, the connector 1242 is provided with a circumferentially extending fastening protrusion 1244, and the outer diameter of the fastening protrusion 1244 decreases from the mounting portion 123 toward the direction away from the upper fixing frame 110. By providing the fastening protrusion 1244, the tail pipe 160 can be prevented from being separated from the connector 1242 to a certain extent.

[0049] In the present embodiment, the limiter 130 is a plastic part with a smooth surface. For example, the limiter 130 can be made of polytetrafluoroethylene. With such a configuration, after the potting glue is cured, the demolding difficulty between the housing 200 and the limiter 130 can be reduced, and there is no need to use a release agent, thereby reducing production costs. In addition, since there is no need to use a release agent, the steps for cleaning the housing 200 and the potting tool 100 for the release agent can be reduced, and the biocompatibility risk of the blood pump caused by the release agent residue on the housing 200 can also be avoided. Specifically, the limiter 130 is a pin rod, and, according to different needs, pin rods of different sizes can be used, and the pin rod can be multiple sections, and the diameter of each section is different.

[0050] Furthermore, the lower fixing frame 120 may also be a plastic part with a smooth surface. Since the potting glue enters the interior of the housing 200 through the lower fixing frame 120, that is, the interior of the lower fixing frame 120 is also filled with the potting glue, therefore, setting the lower fixing frame 120 as a plastic part with a smooth surface can also reduce the demolding difficulty when demolding, without using a release agent.

[0051] Please also see Figure 3 , Figure 4 and Figure 7 The following briefly describes the use process of the potting tool 100 of this embodiment:

[0052] First, the lower fixing frame 120 is fixed to the assembly base plate 140 by bolts, and the assembly base plate 140 is placed on the base 150. The stopper 130 (pin rod) is fixed to the lower fixing frame 120, and the coil 310 and the bearing 320 of the blood pump are sleeved on the outer periphery of the pin rod in sequence, wherein the bearing 320 is also fixed to the top of the coil 310 by the pin rod, and then the housing 200 is sleeved on the outer periphery of the coil 310 and the bearing 320. The positioning hole 1121 on the fixing frame 110 is aligned with the positioning pin 141 on the assembly base plate 140, and the upper fixing frame 110 is fixed to the assembly base plate 140. Finally, the housing 200 is fixed by bolts, such as the fixing member 1113.

[0053] Secondly, the tail pipe 160 is fixed to the connector 1242, and the potting glue is injected through the tail pipe 160 until the potting glue fills the interior of the housing 200 and overflows from the top opening of the housing 200. After that, the glue injection is stopped, the tail pipe 160 is tied to prevent the potting glue from flowing out of the tail pipe 160, and the overflow glue at the top opening of the housing 200 is removed. Finally, the entire potting tool 100 and the device to be potted are placed in a hot box for curing.

[0054] Finally, the cured potting tool 100 is taken out of the hot box. The assembly base plate 140 is removed from the base 150, the bolts in the first limiting hole 142 and the second limiting hole 122 are removed, and the fixing member 1113 is removed, and the upper fixing frame 110 and the assembly base plate 140 are disassembled. At this time, the housing 200 is still connected to the lower fixing frame 120 due to the potting glue and the limiting member 130. The lower fixing frame 120 is removed by rotating the lower fixing frame 120 to break the glue opening, and then the positioning member 130 is pulled out of the housing 200.

[0055] The above is a detailed introduction to the potting tooling provided in the implementation mode of the utility model. Specific examples are used in this article to illustrate the principle and implementation mode of the utility model. The description of the above implementation mode is only used to help understand the idea of ​​the utility model. There may be changes in the specific implementation mode and the scope of application. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. A potting tool, characterized in that: include: An upper fixing frame, used to fix the shell of the device to be potted, wherein the height of the upper fixing frame is smaller than the height of the shell of the device to be potted; A lower fixing frame connected to the upper fixing frame, having a filling channel, wherein the filling channel is used to communicate with the inside of the shell of the device to be filled during filling, and can introduce the filling glue into the inside of the shell; The limiting member is fixed to the lower fixing frame and extends into the shell during potting. The limiting member is used to limit and fix the components in the shell of the potting device.

2. The potting tool according to claim 1, characterized in that: The upper fixing frame includes a fixing portion and a connecting portion, wherein the connecting portion is fixedly connected to the outer periphery of the fixing portion and extends radially along the fixing portion, and the connecting portion is used to connect to the lower fixing frame; the fixing portion has a receiving hole for accommodating the outer shell of the device to be encapsulated, and the axial height of the fixing portion is less than the axial height of the outer shell of the device to be encapsulated.

3. The potting tool according to claim 2, characterized in that: It also includes an assembly base plate, the assembly base plate has a positioning pin and a first limiting hole, the connecting portion has a positioning hole, the lower fixing frame has a second limiting hole, the positioning pin cooperates with the positioning hole to fix the upper fixing frame on the assembly base plate, and the assembly base plate and the lower fixing frame are fixedly connected by positioning pieces that extend into the second limiting hole and the first limiting hole in sequence.

4. The potting tool according to claim 3, characterized in that: It also includes a base, the base has a positioning groove, the assembly base plate is partially located in the positioning groove, and the base supports and positions the assembly base plate.

5. The potting tool according to claim 2, characterized in that: It also includes a fixing member, the fixing portion has a fixing hole extending in the radial direction and connected to the accommodating hole, and the fixing member extends into the fixing hole to abut and fix the shell of the device to be potted along the radial direction during potting.

6. The potting tool according to claim 1, characterized in that: The perfusion channel comprises an input section and a reduced diameter section which are connected to each other, and the input section is connected to the interior of the housing of the device to be potted via the reduced diameter section.

7. The potting tool according to claim 6, characterized in that: The lower fixing frame includes a mounting portion and a perfusion portion fixedly connected to the mounting portion, the mounting portion is fixedly connected to the upper fixing frame, the perfusion portion is provided with the perfusion channel; the perfusion portion is also provided with a placement groove for accommodating the limiter and communicating with the perfusion channel, and the extension direction of the placement groove is the same as the extension direction of the perfusion channel.

8. The potting tool according to claim 7, characterized in that: The pouring part has a connecting head in the shape of a circular column, and the connecting head has an input through hole connected to the pouring channel. The outer diameter of the connecting head decreases from the mounting part in the direction away from the upper fixing frame; the input through hole is used to connect the tail pipe for conveying the potting glue.

9. The potting tool according to claim 8, characterized in that: The connector is provided with a fastening protrusion extending circumferentially and protruding radially, and the outer diameter of the fastening protrusion decreases from the mounting portion toward a direction away from the upper fixing frame.

10. The potting tool according to any one of claims 1 to 9, characterized in that: At least one of the limiting member and the lower fixing frame is a plastic member with a smooth surface.

Images