Positioning and clamping mechanism for processing medical instrument parts

Abstract

The utility model provides a kind of positioning clamping mechanism for medical instrument parts processing, belong to medical instrument manufacturing technical field, including bearing mechanism, including bearing plate, operating table being set in the top of bearing plate;Driving mechanism is used to the clamping assembly for the fixation of material and the buffer assembly for the material clamping buffer.The utility model adopts cylinder drive rack to drive gear rotation, and then drive double-end threaded rod synchronous rotation, make two sides inner thread block under the constraint of guide groove relative movement, realize the automatic centering clamping of clamping plate, the buffer assembly being set in clamping end, effectively reduce the surface indentation risk of thin-walled or special-shaped medical instrument parts, simultaneously, high-precision initial positioning is realized between operating table and bearing plate by conical positioning block, and elastic locking is completed by positioning assembly cooperation, without tool, just dial card block quick assembly and disassembly, both improve the efficiency of change type, and avoid the reference wear caused by bolt connection, ensure the repeat positioning accuracy of long-term use.

Description

Technical Field

[0001] This utility model belongs to the field of medical device manufacturing technology, specifically relating to a positioning and clamping mechanism for processing medical device parts. Background Technology

[0002] In the field of medical device manufacturing, parts such as catheter connectors, miniature valve bodies, implantable screws, and sensor housings are typically characterized by their small size, thin walls, complex geometry, and the use of materials such as medical-grade stainless steel, titanium alloys, or high-performance engineering plastics. This places extremely high demands on the repeatability of positioning and the protection of clamping surfaces during processing. Existing machining fixtures mostly utilize rigid clamping structures from general mechanical fields, such as manual vises, three-jaw chucks, or screw clamping mechanisms. These fixtures are difficult to control precisely, and during clamping, localized stress concentration can easily cause indentations, elliptical deformation, or even micro-cracks in the parts, affecting product sealing or biocompatibility. Furthermore, these fixtures usually lack self-aligning capabilities, requiring repeated manual adjustments, which is inefficient and inconsistent. At the same time, most fixtures are bolted to the worktable, requiring tools for replacement or cleaning. This not only prolongs production line changeover time but also easily leads to wear on the positioning reference surface due to repeated disassembly and assembly, thus reducing the repeatability of positioning over long-term use.

[0003] In the existing technology, the clamping mechanisms used in the processing of medical device parts mostly rely on rigid contact and manual adjustment. When clamping thin-walled, miniature or irregularly shaped parts, the clamping force is often concentrated in a local area, which can easily cause indentations on the surface of the parts. At the same time, the operating table and the base are usually fixed by mechanical connection methods such as bolts and pins. Each time they are replaced or cleaned, tools such as wrenches are required for disassembly and assembly, which is not only time-consuming, but may also cause wear of the positioning reference due to repeated tightening, affecting the repeatability of positioning accuracy in long-term use. Utility Model Content

[0004] The purpose of this invention is to provide a positioning and clamping mechanism for processing medical device parts, which aims to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A positioning and clamping mechanism for machining medical device parts, comprising: The support mechanism includes a support plate, legs fixedly installed at the bottom of the support plate, a conical positioning block fixedly installed on the outer surface of the support plate, an operating platform disposed at the top of the support plate, and a positioning component for fixing the operating platform; The driving mechanism includes a cylinder adapted to be installed on the outer surface of the operating table, a rack fixedly installed on the output end of the cylinder, fixing blocks fixedly installed on both sides of the outer surface of the operating table, a clamping assembly for fixing the material, and a buffering assembly for clamping and buffering the material.

[0006] As a preferred embodiment of this utility model, the clamping assembly includes a double-threaded rod rotatably connected to the fixed block, a gear fixedly installed on the outer surface of the double-threaded rod and meshing with the rack, an internal threaded block threaded to both sides of the double-threaded rod, and a guide groove formed on the outer surface of the operating table and slidingly engaged with the internal threaded block.

[0007] As a preferred embodiment of this utility model, the buffer assembly includes a fixed frame fixedly connected to the outer surface of the internal threaded block, a fixed rod fixedly connected to the inner wall of the fixed frame, a second spring sleeved on the outer surface of the fixed rod, a fixed sleeve fixedly connected to both ends of the second spring and slidingly engaged with the outer surface of the fixed rod, an adjusting rod rotatably connected to the fixed sleeve, and a buffer block rotatably connected to the other end of the adjusting rod.

[0008] As a preferred embodiment of the present invention, the buffer assembly further includes a clamping plate fixedly connected to the buffer block, a positioning pin slidably engaged with the inner surface of the fixed frame, a third spring sleeved on the outer surface of the positioning pin, and a positioning groove formed on the inner surface of the fixed frame and slidably engaged with the positioning pin.

[0009] As a preferred embodiment of the present invention, the positioning component includes mounting blocks fixedly installed on both sides of the outer surface of the bearing plate, a locking block rotatably connected to the mounting blocks and snapped into contact with the operating table, and a first spring fixedly connected to the outer surface of the locking block, the other end of the first spring being fixedly connected to the mounting blocks.

[0010] As a preferred embodiment of this utility model, a bearing is provided at the connection between the double-ended threaded rod and the fixed block, and the outer surface of the internal threaded block slides in fit with the inner surface of the guide groove.

[0011] In a preferred embodiment of this utility model, the inner surface of the fixing frame is slidably engaged with the outer surface of the clamping plate, the inner surface of the fixing sleeve is slidably engaged with the outer surface of the fixing rod, the outer surface of the positioning pin is slidably engaged with the inner surface of the positioning groove, and the two ends of the third spring are respectively fixedly connected to the positioning pin and the outer surface of the fixing frame.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: by using a cylinder to drive the rack and pinion to rotate the gear, which in turn drives the double-headed threaded rod to rotate synchronously, the internal threaded blocks on both sides move towards each other under the constraint of the guide groove, realizing the automatic centering and clamping of the clamping plate. The buffer component set at the clamping end effectively reduces the risk of surface indentation on thin-walled or irregularly shaped medical device parts. At the same time, the operating table and the carrier plate achieve high-precision initial positioning through the conical positioning block, and the positioning component completes elastic locking. The clamping block can be quickly installed and removed without tools, which not only improves the efficiency of changing the type, but also avoids the reference wear caused by bolt connection, and ensures the repeatability of positioning accuracy for long-term use. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them: Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This utility model Figure 1 Enlarged view of point A in the middle; Figure 3 This is a schematic diagram of the structure of the present invention, showing the separation of the operating table and the support plate; Figure 4 This is a schematic diagram of the overall structure of the drive mechanism of this utility model; Figure 5 This is a schematic diagram of the internal structure of the fixing frame of this utility model; Figure 6 This is a side view sectional diagram of the buffer assembly of this utility model.

[0014] In the diagram: 100, bearing mechanism; 101, bearing plate; 102, support leg; 103, conical positioning block; 104, operating table; 105, positioning assembly; 105a, mounting block; 105b, locking block; 105c, first spring; 200, drive mechanism; 201, cylinder; 202, rack; 203, fixing block; 204, clamping assembly; 204a, double-ended threaded rod; 204b, gear; 204c, internal threaded block; 204d, guide groove; 205, buffer assembly; 205a, fixing frame; 205b, fixing rod; 205c, second spring; 205d, fixing sleeve; 205e, adjusting rod; 205f, buffer block; 205g, clamping plate; 205h, positioning pin; 205i, third spring; 205j, positioning groove. Detailed Implementation

[0015] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0016] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0017] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0018] Example Reference Figures 1-6 This is an embodiment of the present invention, which provides a positioning and clamping mechanism for processing medical device parts, comprising: The support mechanism 100 includes a support plate 101, a support leg 102 fixedly installed at the bottom of the support plate 101, a conical positioning block 103 fixedly installed on the outer surface of the support plate 101, an operating table 104 provided at the top of the support plate 101, and a positioning component 105 for fixing the operating table 104. The drive mechanism 200 includes a cylinder 201 adapted to be installed on the outer surface of the operating table 104, a rack 202 fixedly installed on the output end of the cylinder 201, a fixing block 203 fixedly installed on both sides of the outer surface of the operating table 104, a clamping assembly 204 for fixing materials, and a buffering assembly 205 for clamping and buffering materials.

[0019] Specifically, the clamping assembly 204 includes a double-threaded rod 204a rotatably connected to the fixing block 203, a gear 204b fixedly installed on the outer surface of the double-threaded rod 204a and meshing with the rack 202, an internal threaded block 204c threaded to both sides of the double-threaded rod 204a, and a guide groove 204d formed on the outer surface of the operating table 104 and slidingly engaged with the internal threaded block 204c.

[0020] In this process, the cylinder 201 extends and retracts, causing the rack 202 to move linearly. The rack 202 meshes with the gear 204b, thereby driving the double-threaded rod 204a to rotate. Since the double-threaded rod 204a has threads with opposite directions at both ends, the two internal threaded blocks 204c connected to it move synchronously towards or away from each other under the constraint of the guide groove 204d, thereby driving the buffer assembly 205 and the clamping plate to automatically center, clamp, or release the medical device parts.

[0021] Furthermore, the buffer assembly 205 includes a fixed frame 205a fixedly connected to the outer surface of the internal threaded block 204c, a fixed rod 205b fixedly connected to the inner wall of the fixed frame 205a, a second spring 205c sleeved on the outer surface of the fixed rod 205b, a fixed sleeve 205d fixedly connected to both ends of the second spring 205c and slidingly engaged with the outer surface of the fixed rod 205b, an adjusting rod 205e rotatably connected to the fixed sleeve 205d, and a buffer block 205f rotatably connected to the other end of the adjusting rod 205e.

[0022] Furthermore, the buffer assembly 205 also includes a clamping plate 205g fixedly connected to the buffer block 205f, a positioning pin 205h slidingly engaged with the inner surface of the fixed frame 205a, a third spring 205i sleeved on the outer surface of the positioning pin 205h, and a positioning groove 205j opened on the inner surface of the fixed frame 205a and slidingly engaged with the positioning pin 205h.

[0023] When the clamping plate 205g contacts the medical device part, the reaction force is transmitted to the fixing sleeves 205d on both sides through the buffer block 205f and the adjusting rod 205e. This causes the two fixing sleeves 205d to move synchronously towards each other along the fixing rod 205b, thereby centering and compressing the second spring 205c located between them. At the same time, the positioning pin 205h slides along the positioning groove 205j under the action of the third spring 205i, guiding and limiting the movement of the clamping plate. This ensures that the clamping process is stable and free from rigid impact, effectively protecting the surface of the precision medical parts from damage.

[0024] Furthermore, the positioning component 105 includes mounting blocks 105a fixedly mounted on both sides of the outer surface of the support plate 101, a locking block 105b rotatably connected to the mounting blocks 105a and snapped into contact with the operating table 104, and a first spring 105c fixedly connected to the outer surface of the locking block 105b, with the other end of the first spring 105c fixedly connected to the mounting blocks 105a.

[0025] When the operating table 104 is installed, its bottom center hole or groove is inserted and fitted with the conical positioning block 103 on the bearing plate 101. The high-precision initial positioning is achieved by utilizing the self-centering characteristic of the conical surface. Subsequently, the operating table 104 is pressed down, causing the locking block 105b to rotate outward under force and compress the first spring 105c. When it is fully in place, the first spring 105c drives the locking block 105b to rebound and lock into the side wall of the operating table 104, completing the mechanical locking. When disassembling, the locking block 105b only needs to be manually pushed outward to release the limit, and the operating table can be quickly removed.

[0026] Preferably, a bearing is provided at the connection between the double-threaded rod 204a and the fixed block 203, and the outer surface of the internal threaded block 204c slides in fit with the inner surface of the guide groove 204d.

[0027] It should be noted that the inner surface of the fixed frame 205a slides with the outer surface of the clamping plate 205g, the inner surface of the fixed sleeve 205d slides with the outer surface of the fixed rod 205b, the outer surface of the positioning pin 205h slides with the inner surface of the positioning groove 205j, and the two ends of the third spring 205i are fixedly connected to the outer surfaces of the positioning pin 205h and the fixed frame 205a, respectively.

[0028] In use, firstly, align the operating table 104 above the support plate 101, so that the center hole or positioning groove at its bottom engages with the conical positioning block 103 fixed to the top of the support plate 101. Thanks to the self-centering characteristic of the conical structure, the operating table 104 automatically achieves high-precision initial positioning during the lowering process, ensuring the consistency of the subsequent clamping reference. Subsequently, the operating table 104 continues to press down, and its side wall contacts the locking block 105b, pushing the locking block 105b to rotate outward around the mounting block 105a and compress it. When the operating table 104 is fully in place, the first spring 105c releases its elastic force, driving the locking block 105b to rebound and engage in the step or slot on the side wall of the operating table 104, completing the mechanical locking and thus firmly fixing the operating table 104 onto the bearing mechanism 100. At this time, the medical device parts to be processed are placed between the two clamping plates 205g, and the cylinder 201 is activated. Its piston rod extends, driving the rack 202 to move linearly. The rack 202 meshes with the gear 204b, thereby driving... As the double-threaded rod 204a rotates, and because its two ends have threads with opposite directions of rotation, under the constraint of the guide groove 204d, the two internal threaded blocks 204c move synchronously towards each other, causing the buffer assembly 205 to move towards the center. When the clamping plate 205g contacts the workpiece, the reaction force is transmitted through the buffer block 205f and the adjusting rod 205e to the fixed sleeves 205d on both sides, causing them to slide synchronously towards each other along the fixed rod 205b, thus compressing the second spring 205c in the middle for centering. The system provides flexible buffering. Meanwhile, the positioning pin 205h slides along the positioning groove 205j under the action of the third spring 205i, precisely guiding and limiting the movement trajectory of the clamping plate 205g to avoid skewing or shaking. This ensures a smooth clamping process without rigid impact, effectively protecting the surface of precision medical parts from being crushed or deformed. If cleaning or maintenance is required, simply manually push the two side blocks 105b outward to release their restriction on the operating table 104, and the entire operating table module can be quickly removed, achieving efficient model changeover.

[0029] In summary, by using cylinder 201 to drive rack 202 to rotate gear 204b, which in turn drives double-headed threaded rod 204a to rotate synchronously, the two internal threaded blocks 204c on both sides move towards each other under the constraint of guide groove 204d, achieving automatic centering and clamping of clamping plate 205g. The buffer component 205 set at the clamping end includes a fixed rod 205b, a second spring 205c, double-sided fixed sleeves 205d and adjusting rod 205e, so that the clamping force is evenly distributed and flexibly applied, effectively reducing the risk of surface indentation on thin-walled or irregularly shaped medical device parts. At the same time, the operating table 104 and the support plate 101 achieve high-precision initial positioning through tapered positioning block 103, and the locking block 105b in the positioning component 105 cooperates with the first spring 105c to complete elastic locking. The locking block 105b can be quickly installed and removed without tools, which not only improves the efficiency of changing shapes, but also avoids the reference wear caused by bolt connection, ensuring the repeatability of positioning accuracy for long-term use.

[0030] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0031] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0032] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0033] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A positioning and clamping mechanism for processing medical device parts, characterized in that: include, The support mechanism (100) includes a support plate (101), a support leg (102) fixedly installed at the bottom of the support plate (101), a conical positioning block (103) fixedly installed on the outer surface of the support plate (101), an operating table (104) set on the top of the support plate (101), and a positioning component (105) for fixing the operating table (104). The drive mechanism (200) includes a cylinder (201) adapted to be installed on the outer surface of the operating table (104), a rack (202) fixedly installed on the output end of the cylinder (201), a fixing block (203) fixedly installed on both sides of the outer surface of the operating table (104), a clamping assembly (204) for fixing the material, and a buffer assembly (205) for clamping and buffering the material.

2. The positioning and clamping mechanism for processing medical device parts according to claim 1, characterized in that: The clamping assembly (204) includes a double-threaded rod (204a) rotatably connected to the fixed block (203), a gear (204b) fixedly installed on the outer surface of the double-threaded rod (204a) and meshing with the rack (202), an internal threaded block (204c) threadedly connected to both sides of the double-threaded rod (204a), and a guide groove (204d) formed on the outer surface of the operating table (104) and slidingly engaged with the internal threaded block (204c).

3. The positioning and clamping mechanism for processing medical device parts according to claim 2, characterized in that: The buffer assembly (205) includes a fixed frame (205a) fixedly connected to the outer surface of the internal threaded block (204c), a fixed rod (205b) fixedly connected to the inner wall of the fixed frame (205a), a second spring (205c) sleeved on the outer surface of the fixed rod (205b), a fixed sleeve (205d) fixedly connected to both ends of the second spring (205c) and slidingly engaged with the outer surface of the fixed rod (205b), an adjusting rod (205e) rotatably connected to the fixed sleeve (205d), and a buffer block (205f) rotatably connected to the other end of the adjusting rod (205e).

4. The positioning and clamping mechanism for processing medical device parts according to claim 3, characterized in that: The buffer assembly (205) further includes a clamping plate (205g) fixedly connected to the buffer block (205f), a positioning pin (205h) slidably engaged with the inner surface of the fixed frame (205a), a third spring (205i) sleeved on the outer surface of the positioning pin (205h), and a positioning groove (205j) formed on the inner surface of the fixed frame (205a) and slidably engaged with the positioning pin (205h).

5. The positioning and clamping mechanism for processing medical device parts according to claim 4, characterized in that: The positioning component (105) includes mounting blocks (105a) fixedly mounted on both sides of the outer surface of the support plate (101), a locking block (105b) rotatably connected to the mounting block (105a) and snapped into the operating table (104), and a first spring (105c) fixedly connected to the outer surface of the locking block (105b). The other end of the first spring (105c) is fixedly connected to the mounting block (105a).

6. The positioning and clamping mechanism for processing medical device parts according to claim 5, characterized in that: A bearing is provided at the connection between the double-ended threaded rod (204a) and the fixed block (203), and the outer surface of the internal threaded block (204c) slides in fit with the inner surface of the guide groove (204d).

7. The positioning and clamping mechanism for processing medical device parts according to claim 6, characterized in that: The inner surface of the fixed frame (205a) is in sliding engagement with the outer surface of the clamp (205g), the inner surface of the fixed sleeve (205d) is in sliding engagement with the outer surface of the fixed rod (205b), the outer surface of the positioning pin (205h) is in sliding engagement with the inner surface of the positioning groove (205j), and the two ends of the third spring (205i) are fixedly connected to the positioning pin (205h) and the outer surface of the fixed frame (205a), respectively.

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