Medical artificial knee joint grinding and positioning tool

Abstract

The utility model belongs to the technical field of grinding positioning tools, and particularly relates to a medical artificial knee joint grinding positioning tool which comprises a connecting seat, an oil seat and a base, the oil seat and the base are installed at the front end of the connecting seat, the base is movably installed on the oil seat in the axial direction, and supporting bodies attached to a plurality of positions of the inner side of a workpiece are formed outside the base. A driving sleeve, a pressing sleeve and a nut which are used for axially clamping or loosening the connecting rod through threads are arranged in the base, the pressing sleeve is in threaded connection with the nut, and the driving sleeve is in extrusion fit with the pressing sleeve; the multi-position supporting bodies are arranged to support a workpiece, and then the connecting rod is clamped through the driving sleeve, the pressing sleeve and the nut, so that multi-point supporting is achieved while quick clamping is facilitated, and the stability of the workpiece during grinding is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of grinding positioning tooling technology, and in particular relates to grinding positioning tooling for medical artificial knee joints. Background Technology

[0002] Grinding is a machining method for removing material. It refers to the process of removing excess material from a workpiece using abrasives or grinding wheels. Grinding is one of the most widely used material removal methods; during grinding, positioning fixtures are required to fix the workpiece in place.

[0003] An existing type of artificial knee joint requires grinding during processing. Because the workpiece is relatively thin and irregularly shaped, it cannot be directly clamped using traditional methods. Multi-point independent support can ensure the positioning effect, but the ease of operation is not ideal.

[0004] To address the aforementioned issues, this application proposes a grinding and positioning fixture for medical artificial knee joints. Utility Model Content

[0005] The purpose of this invention is to provide a grinding and positioning fixture for artificial knee joints used in medical applications, which solves the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model relates to a grinding and positioning fixture for a medical artificial knee joint, comprising a connecting seat and an oil seat and a base installed at its front end. The base is axially movably installed on the oil seat. The base has a support body formed on its exterior that fits against multiple positions on the inner side of the workpiece. The base is provided with a drive sleeve, a pressure sleeve, and a nut that achieve axial clamping or loosening of the connecting rod through threads. The pressure sleeve and the nut are threadedly connected, and the drive sleeve and the pressure sleeve are press-fitted together.

[0008] Preferably, the base has a tightening groove in the radial direction to accommodate the drive sleeve, and the inner side of the drive sleeve has a through hole for the threaded body to pass through, and the through hole has a slope surface that cooperates with the elastic body.

[0009] Preferably, the pressure sleeve has a through hole in the middle for inserting the connecting rod, and the base has a through hole communicating with the tightening groove, and the through hole is slidably engaged with the threaded body.

[0010] Preferably, the threaded body and the through hole are non-circular components with a sliding fit.

[0011] Preferably, the base has a clamping groove that communicates with the through hole, and the nut is located in the clamping groove and is threadedly engaged with the threaded body.

[0012] Preferably, the oil seat has an oil cavity that slides axially with the movable rod, and the oil cavity has a cap at one end near the connecting seat.

[0013] Preferably, the connecting seat is provided with a pipe groove that communicates with the cover.

[0014] This utility model has the following beneficial effects:

[0015] This utility model supports the workpiece by setting up support bodies at multiple positions, and then clamps the connecting rod by driving sleeve, pressure sleeve and nut, thereby achieving multi-point support while facilitating quick clamping and ensuring the stability of the workpiece during grinding.

[0016] This invention improves grinding flexibility by providing axial movement of the workpiece through the extension and retraction between the oil seat and the base.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying 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.

[0019] Figure 1 This is a schematic diagram of the overall appearance structure of this utility model;

[0020] Figure 2 for Figure 1 A side view of the structure;

[0021] Figure 3 for Figure 1 Rear view structural diagram;

[0022] Figure 4 for Figure 1 A frontal view of the structural diagram;

[0023] Figure 5 for Figure 1 A schematic diagram of the structure after the workpiece is removed from the middle section;

[0024] Figure 6 This is a partial structural diagram of the present invention.

[0025] Figure 7 This is a partially enlarged structural diagram of the base;

[0026] Figure 8 A structural diagram showing the disassembled components of the base, drive sleeve, pressure sleeve, and nut;

[0027] Figure 9 A top-view, partially cross-sectional structural diagram of the workpiece in its connected state;

[0028] The attached diagram lists the components represented by each number as follows:

[0029] In the diagram: 1. Connecting seat; 11. Pipe groove; 2. Oil seat; 21. Oil cavity; 22. Cover; 3. Base; 31. Movable rod; 32. Support body; 33. Tightening groove; 34. Through hole; 35. Pressing groove; 4. Drive sleeve; 5. Pressure sleeve; 51. Elastic body; 52. Threaded body; 6. Nut; 7. Workpiece; 71. Connecting rod. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around" and other terms indicating orientation or positional relationship are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements 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.

[0032] Please see Figures 1-9 As shown, this utility model is a grinding and positioning fixture for a medical artificial knee joint, including a connecting seat 1 and an oil seat 2 and a base 3 installed at its front end. The base 3 is axially movably installed on the oil seat 2. An oil cavity 21 is provided through the oil seat 2 and slides axially with the movable rod 31. A cover 22 is provided at one end of the oil cavity 21 near the connecting seat 1. The cover 22 is sealed to the oil cavity 21. A pipe groove 11 is provided in the connecting seat 1 and communicates with the cover 22. A connection port for connecting an external oil pipe is provided on the cover 22. The oil pipe is connected to an external hydraulic device through the pipe groove 11. The injection or extraction of hydraulic oil by the hydraulic device drives the base 3 to extend and retract axially at the front end of the oil seat 2.

[0033] Furthermore, the base 3 has a support body 32 formed on the outside that fits against multiple positions on the inside of the workpiece 7. The support body 32 at multiple positions provides support from inside the workpiece 7 to prevent deformation of the workpiece 7 during external grinding. The base 3 is provided with a drive sleeve 4, a pressure sleeve 5, and a nut 6 that achieve axial clamping or loosening of the connecting rod 71 through threads. The pressure sleeve 5 and the nut 6 are threadedly connected, and the drive sleeve 4 and the pressure sleeve 5 are squeezed together.

[0034] Furthermore, the base 3 has a tightening groove 33 arranged radially to accommodate the drive sleeve 4. The drive sleeve 4 has a through hole for the threaded body 52 to pass through, and the through hole has a slope surface that cooperates with the elastic body 51. The diameter of the through hole 34 is smaller than that of the tightening groove 33, thereby providing axial support for the drive sleeve 4.

[0035] Furthermore, the middle of the pressure sleeve 5 is provided with a through hole for the insertion of the connecting rod 71, and the base 3 is provided with a through hole 34 communicating with the tightening groove 33. The diameter of the through hole 34 is smaller than that of the tightening groove 33, so as to provide axial support for the drive sleeve 4. The through hole 34 is in sliding fit with the threaded body 52. ​​The threaded body 52 and the through hole 34 are non-circular components in sliding fit. As shown in the figure, the two are D-shaped structures to prevent the pressure sleeve 5 from rotating synchronously after the nut 6 rotates, thereby ensuring the full transmission of force.

[0036] Furthermore, a clamping groove 35 communicating with the through hole 34 is provided in the base 3. The nut 6 is located in the clamping groove 35 and is threadedly engaged with the threaded body 52. ​​The nut 6 abuts against the through hole 34 axially. When the nut 6 and the threaded body 52 are screwed together, the pressure sleeve 5 is pulled to tighten. Finally, the workpiece 7 is positioned by the connecting rod 71.

[0037] A specific application of this embodiment is as follows: the connecting seat 1 and the oil seat 2 are bolted together, the movable rod 31 in the oil seat 2 slides axially in the oil cavity 21, the oil cavity 21 is fixed at the end of the oil seat 2 near the connecting seat 1, and the oil pipe is connected to the oil cavity 21 through the pipe groove 11 and the cover 22, thereby realizing the movement of the base 3 on the oil seat 2.

[0038] When clamped, the workpiece 7 rests against the base 3, and the supports 32 at multiple positions simultaneously contact the corresponding surfaces of the workpiece 7. The connecting rod 71 is inserted into the pressure sleeve 5. After the nut 6 is turned, the threaded body 52 moves axially towards the nut 6 through the helix of the nut 6. At this time, the elastic body 51 moves inward after being squeezed by the drive sleeve 4. Finally, the elastic body 51 clamps the connecting rod 71 in a ring-like manner, which can cooperate with the grinding disc to perform the grinding work on the workpiece 7. By injecting and extracting oil in the oil chamber 21, the base 3 and the workpiece 7 are driven to move axially.

[0039] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A grinding and positioning fixture for medical artificial knee joints, comprising a connecting seat (1) and an oil seat (2) and a base (3) mounted on its front end, characterized in that: The base (3) is axially mounted on the oil seat (2). The base (3) has a support body (32) that fits against multiple positions on the inner side of the workpiece (7). The base (3) is provided with a drive sleeve (4), a pressure sleeve (5), and a nut (6) that achieve axial clamping or loosening of the connecting rod (71) through threads. The pressure sleeve (5) is threadedly connected to the nut (6), and the drive sleeve (4) and the pressure sleeve (5) are squeezed together.

2. The medical artificial knee joint grinding and positioning fixture according to claim 1, characterized in that: The base (3) has a tightening groove (33) in the radial direction to accommodate the drive sleeve (4). The drive sleeve (4) has a through hole for the threaded body (52) to pass through, and the through hole has a slope surface that cooperates with the elastic body (51).

3. The medical artificial knee joint grinding and positioning fixture according to claim 1, characterized in that: The pressure sleeve (5) has a through hole in the middle for inserting the connecting rod (71), and the base (3) has a through hole (34) communicating with the tightening groove (33). The through hole (34) is in sliding fit with the threaded body (52).

4. The medical artificial knee joint grinding and positioning fixture according to claim 3, characterized in that: The threaded body (52) and the through hole (34) are non-circular components with a sliding fit.

5. The medical artificial knee joint grinding and positioning fixture according to claim 2, characterized in that: The base (3) has a clamping groove (35) that communicates with the through hole (34), and the nut (6) is located in the clamping groove (35) and is threadedly engaged with the threaded body (52).

6. The medical artificial knee joint grinding and positioning fixture according to claim 1, characterized in that: The oil seat (2) has an oil cavity (21) that slides axially with the movable rod (31), and the oil cavity (21) has a cover (22) at one end near the connecting seat (1).

7. The medical artificial knee joint grinding and positioning fixture according to claim 6, characterized in that: The connecting seat (1) is provided with a pipe groove (11) that communicates with the cover (22).

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