Femoral condyle prosthesis workpiece clamp

Abstract

The utility model provides a femur condyle prosthesis workpiece clamp which comprises a base, a main supporting rod and an auxiliary supporting rod, a clamping block is fixedly arranged at the top of the main supporting rod, an inserting hole for inserting a first inserting foot of a femur condyle prosthesis workpiece is formed in the clamping block, and a first locking part for locking the first inserting foot in the inserting hole is arranged on the clamping block; and the auxiliary support rod is used for supporting a second pin of the femoral condyle prosthesis workpiece. According to the femoral condyle prosthesis workpiece clamp, a femoral condyle prosthesis workpiece can be stably and reliably clamped under the combined action of the main supporting rod and the auxiliary supporting rod, and the femoral condyle prosthesis workpiece clamp is easy and convenient to operate and convenient to disassemble and assemble, so that the measuring efficiency can be improved; the femoral condyle prosthesis workpiece is clamped at the tops of the main supporting rod and the auxiliary supporting rod, and the main supporting rod and the auxiliary supporting rod are arranged at intervals in the horizontal direction, so that the clamp can be prevented from shielding light of a sensor of a measuring machine, the measuring machine can comprehensively and accurately measure the femoral condyle prosthesis workpiece, and the measuring precision is improved.

Description

Technical Field

[0001] This utility model belongs to the field of tooling and fixture technology, specifically relating to a fixture for clamping a femoral condyle prosthesis workpiece during measurement. Background Technology

[0002] The dimensional and shape accuracy of the femoral condyle prosthesis plays a crucial role in unicompartmental knee arthroplasty. Before use, the dimensions and shape of the femoral condyle prosthesis must be measured to ensure its accuracy. The structure of femoral condyle prosthesis piece 1 is as follows... Figure 1 As shown, it includes an arc-shaped femoral condyle prosthesis body 1.1 and a first pin 1.2 and a second pin 1.3 fixed on the back of the femoral condyle prosthesis body 1.1. The femoral condyle prosthesis body 1.1 is arc-shaped, and the first pin 1.2 and the second pin 1.3 are used to insert into the femur to fix the femoral condyle prosthesis.

[0003] The dimensions and shape of femoral condyle prostheses are typically measured using a coordinate measuring machine (CMM), which currently relies heavily on tooling fixtures. Existing technology often uses simple, conventional fixtures to clamp the femoral condyle prosthesis onto the CMM's worktable.

[0004] The structure of the existing simple fixture 2 for femoral condyle prosthesis workpiece is as follows: Figure 2 As shown, the fixture includes a clamp body 2.1, which has a V-shaped positioning groove 2.2. An annular positioning element 2.3 is fixedly supported within the V-shaped positioning groove 2.2. When the femoral condyle prosthesis workpiece is clamped, its first prong is inserted into the central hole of the annular positioning element 2.3 and fixed with adhesive. The second prong abuts against an outer side 2.4 of the clamp body 2.1 and is also fixed to this outer side surface with adhesive. The fixed position of the second prong is as follows... Figure 2 The position of the dotted line column is shown. After clamping, the femoral condyle prosthesis body is located on one side of the fixture body. The fixture body will block the light from the measuring machine sensor from being projected onto the back of the femoral condyle prosthesis body, making it difficult to measure some features on the back of the femoral condyle prosthesis body, thus affecting the measurement accuracy of the workpiece. In addition, the workpiece is fixed by adhesive, which is inconvenient to disassemble and assemble, thus affecting the workpiece measurement efficiency. Furthermore, although the second pin is fixed to the outer surface of the fixture body by adhesive, it has no vertical support and poor stability, thus affecting the support stability of the entire prosthesis workpiece, which will further affect the measurement accuracy. Summary of the Invention

[0005] This invention provides a femoral condyle prosthesis workpiece fixture, which can solve the problems of poor measurement accuracy and low measurement efficiency in the prior art due to the lack of a dedicated fixture for measuring femoral condyle prosthesis workpieces.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is a femoral condyle prosthesis workpiece clamp, comprising:

[0007] Base;

[0008] A main support rod is erected on the base. A clamping block is fixed to the top of the main support rod. An insertion hole for inserting the first pin of the femoral condyle prosthesis is formed on the clamping block. A first locking component is provided on the clamping block for locking the first pin in the insertion hole.

[0009] An auxiliary support rod is erected on the base and spaced horizontally from the main support rod. The auxiliary support rod is used to support the second pin of the femoral condyle prosthesis workpiece.

[0010] The technical solution of this utility model also includes the following additional technical features:

[0011] The axis of the insertion hole is a horizontal axis, the auxiliary support rod has a horizontal support top surface, and the second insertion pin is horizontally supported on the horizontal support top surface.

[0012] The clamping block has a first threaded hole that is perpendicularly connected to the insertion hole. The axis of the first threaded hole is a horizontal axis. The first locking component is a ball head bolt that mates with the first threaded hole.

[0013] The clamping block has a second threaded hole that is perpendicularly connected to the first threaded hole. The axis of the second threaded hole is a vertical axis. An anti-loosening screw is installed in the second threaded hole, and the anti-loosening screw abuts against the first locking component.

[0014] Multiple first locking components are arranged horizontally, and each anti-loosening top screw corresponds to one of the first locking components.

[0015] The main support rod has a horizontal mounting top surface with a threaded mounting hole. The clamping block has a horizontal bottom surface with a connecting stud formed thereon. The connecting stud is threaded into the threaded mounting hole, and the horizontal bottom surface is in contact with the horizontal mounting top surface.

[0016] The main support rod includes a fixed section and an adjustable section. The adjustable section is slidably connected to the fixed section to achieve lifting and lowering adjustment. The fixed section is provided with a second locking component for locking the adjustable section.

[0017] The auxiliary support rod includes a fixed section and an adjustable section. The adjustable section is slidably connected to the fixed section to achieve lifting and lowering adjustment. The fixed section is provided with a third locking component for locking the adjustable section.

[0018] The adjustable section of the main support rod is provided with scale lines distributed in the vertical direction, and the adjustable section of the auxiliary support rod is provided with corresponding scale lines distributed in the vertical direction.

[0019] The base has a plurality of threaded holes arranged in a rectangular array. The bottom end of the main support rod has a first stud, which is threadedly connected to one of the threaded holes a. The bottom end of the auxiliary support rod has a second stud, which is threadedly connected to one of the threaded holes b.

[0020] Compared with the prior art, the present invention has the following advantages and positive effects:

[0021] 1. The femoral condyle prosthesis workpiece clamp of this utility model includes a base and a main support rod and an auxiliary support rod erected on the base. A clamping block is fixed at the top of the main support rod for locking the first insertion foot of the femoral condyle prosthesis workpiece. The auxiliary support rod is used to support the second insertion foot of the femoral condyle prosthesis workpiece, thereby assisting in supporting and balancing the workpiece. Under the combined action of the main support rod and the auxiliary support rod, the femoral condyle prosthesis workpiece can be stably and reliably clamped, and the operation is simple and convenient for disassembly and assembly, which helps to improve measurement efficiency.

[0022] 2. The femoral condyle prosthesis workpiece is clamped on the top of the main support rod and the auxiliary support rod, and the main support rod and the auxiliary support rod are set at intervals along the horizontal direction. This avoids the fixture from blocking the light of the measuring machine sensor, which is conducive to the measuring machine to measure the femoral condyle prosthesis workpiece comprehensively and accurately, thereby improving the measurement accuracy. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A schematic diagram of the femoral condyle prosthesis component;

[0025] Figure 2 This is a schematic diagram of a simple fixture for femoral condyle prosthesis workpieces in the prior art;

[0026] Figure 3 This is a schematic diagram of the femoral condyle prosthesis workpiece fixture in an embodiment of this utility model;

[0027] Figure 4 for Figure 3 Enlarged view of part A;

[0028] Figure 5 This is a top view of the femoral condyle prosthesis workpiece fixture in this embodiment of the invention, omitting the base;

[0029] Figure 6 for Figure 5 BB section view;

[0030] Figure 7 for Figure 6 Enlarged view of part C;

[0031] Figure 8 This is a schematic diagram of the femoral condyle prosthesis workpiece fixture set on a coordinate measuring machine in an embodiment of this utility model.

[0032] Figure label:

[0033] 1. Femoral condyle prosthesis workpiece; 1.1. Femoral condyle prosthesis body; 1.2. First pin; 1.3. Second pin;

[0034] 2. Simple clamp; 2.1 Clamp body; 2.2 V-shaped positioning groove; 2.3 Annular positioning element; 2.4 Outer surface;

[0035] 3. Femoral condyle prosthesis workpiece clamp;

[0036] 4. Coordinate measuring machine; 4.1. Measuring machine worktable;

[0037] 10. Main support rod; 11. Horizontal mounting top surface; 12. Fixed section of main support rod; 13. Adjustable section of main support rod; 14. Circular tube section; 15. Threaded hole; 16. Threaded mounting hole; 17. First stud;

[0038] 20. Auxiliary support rod; 21. Horizontal support top surface; 22. Fixed section of auxiliary support rod; 23. Adjustable section of auxiliary support rod;

[0039] 30. Base; 31. Threaded hole in the base;

[0040] 40. Clamping block; 41. Insertion hole; 42. First threaded hole; 43. Second threaded hole; 44. Horizontal bottom surface; 45. Connecting stud;

[0041] 50. First locking component;

[0042] 60. Anti-loosening set screw;

[0043] 70. Second locking component;

[0044] 80. Third locking component;

[0045] 90. Scale lines. Detailed Implementation

[0046] 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 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.

[0047] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0048] Reference Figures 3 to 8 At the same time, combined Figure 1 In some embodiments of this utility model, a femoral condyle prosthesis workpiece clamp 3 includes a base 30, a main support rod 10, and an auxiliary support rod 20.

[0049] The base 30 serves as the supporting foundation for the entire femoral condyle prosthesis workpiece fixture 3. It is in the shape of a horizontal plate, with both the top and bottom surfaces being horizontal. The entire femoral condyle prosthesis workpiece fixture 3 can be fixed onto the worktable of a coordinate measuring machine 4 or other measuring equipment via the base 30.

[0050] The main support rod 10 is erected on the base 30. A clamping block 40 is fixed on the top of the main support rod 10. An insertion hole 41 is formed on the clamping block 40. The insertion hole 41 is used to insert the first pin 1.2 of the femoral condyle prosthesis workpiece 1. The clamping block 40 is also provided with a first locking component 50, which is used to lock the first pin 1.2 of the femoral condyle prosthesis workpiece 1 in the insertion hole 41, so that the entire femoral condyle prosthesis workpiece clamp 3 is clamped and fixed on the top of the main support rod 10.

[0051] The auxiliary support rod 20 is also erected on the base 30 and is spaced apart from the main support rod 10 in the horizontal direction. The auxiliary support rod 20 is used to support the second pin 1.3 of the femoral condyle prosthesis workpiece 1, that is, the second pin 1.3 of the femoral condyle prosthesis workpiece 1 is supported on the auxiliary support rod 20.

[0052] In some embodiments of this utility model, the femoral condyle prosthesis workpiece clamp 3 can stably and reliably clamp and support the femoral condyle prosthesis workpiece 1, and is easy to operate and disassemble, which is beneficial to improving measurement efficiency. The femoral condyle prosthesis workpiece 1 is clamped on the top of the main support rod 10 and the auxiliary support rod 20, and the main support rod 10 and the auxiliary support rod 20 are spaced a certain distance apart in the horizontal direction, which can avoid clamp interference and block the light of the measuring machine sensor from shining on the workpiece, which is beneficial for the coordinate measuring machine 4 to measure the femoral condyle prosthesis workpiece 1 comprehensively and accurately, so as to improve the measurement accuracy.

[0053] like Figure 4 and Figure 5 As shown, when the femoral condyle prosthesis workpiece 1 is in the clamping state, its first pin 1.2 is not fully inserted into the insertion hole 41, but a section is exposed, so that the femoral condyle prosthesis body 1.1 and the main support rod 10 and the auxiliary support rod 20 are also spaced a certain distance in the horizontal direction, thereby further effectively preventing the fixture from blocking the light from the measuring machine sensor from shining on the workpiece.

[0054] In some embodiments of this utility model, such as Figure 4 As shown, the axis of the insertion hole 41 on the clamping block 40 is a horizontal axis, that is, the insertion hole 41 is a horizontal hole, so the first insertion 1.2 is horizontally inserted into the insertion hole 41; the auxiliary support rod 20 has a horizontal support top surface 21, and the second insertion 1.3 is horizontally supported on the horizontal support top surface 21, so that the main measuring surface of the femoral condyle prosthesis body 1.1 (the smooth arc front and the back where the first insertion 1.2 and the second insertion 1.3 are located) can be in a better measuring position, which is convenient for measurement.

[0055] For the first locking component 50, specifically, as Figures 4 to 7 As shown, the clamping block 40 has a first threaded hole 42 that is perpendicularly connected to the insertion hole 41. The first threaded hole 42 is a horizontal hole with a horizontal axis. The first locking component 50 is a ball head bolt that mates with the first threaded hole 42. The mating structure between the ball head bolt and the first threaded hole 42 facilitates locking and unlocking, thereby facilitating the installation and removal of the femoral condyle prosthesis workpiece 1. The ball head of the ball head bolt has a protective function; when locked, the ball head rests against the first prong 1.2 of the workpiece, which can also prevent the workpiece from being pinched.

[0056] Furthermore, a second threaded hole 43 is formed on the clamping block 40, which is perpendicularly connected to the first threaded hole 42. The axis of the second threaded hole 43 is a vertical axis. An anti-loosening set screw 60 is installed in the second threaded hole 43. The anti-loosening set screw 60 abuts against the first locking component 50 (ball head bolt) and locks the first locking component 50 to prevent rotation. This can effectively prevent the first locking component 50 from loosening and falling off during measurement, and further improves the clamping stability of the femoral condyle prosthesis workpiece 1.

[0057] In some embodiments of this utility model, such as Figure 4 and Figure 5 As shown, multiple first locking components 50 are horizontally arranged, and multiple anti-loosening set screws 60 are also arranged in correspondence with the first locking components 50 to further improve the clamping stability.

[0058] For the installation of clamping block 40 on main support rod 10, such as Figure 7As shown, the main support rod 10 has a horizontal mounting top surface 11 with a threaded mounting hole 16. The clamping block 40 has a horizontal bottom surface 44 with a connecting stud 45 formed thereon. The connecting stud 45 is threaded into the threaded mounting hole 16, and the horizontal bottom surface 44 of the clamping block 40 is in contact with the horizontal mounting top surface 11 of the main support rod 10. This ensures that the main support rod 10 and the clamping block 40 have the largest possible contact area, improving the stability and reliability of the support. At the same time, the threaded connection facilitates the disassembly and replacement of different clamping blocks 40 according to different sizes and shapes of femoral condyle prosthesis workpieces 1, improving measurement efficiency.

[0059] To further improve clamping flexibility and measurement convenience, such as Figure 3 , Figure 5 and Figure 6 As shown, the main support rod 10 includes a fixed section 12 and an adjustable section 13. The adjustable section 13 is located above the fixed section 12 and is slidably connected to the fixed section 12 to allow for height adjustment of the adjustable section 13 relative to the fixed section 12, thereby achieving height adjustment of the main support rod 10. The fixed section 12 is provided with a second locking component 70 for locking the adjustable section 13, so as to position the adjustable section 13 in the adjusted position after it has been adjusted to the correct position.

[0060] Similarly, the auxiliary support rod 20 includes a fixed section 22 and an adjustable section 23. The adjustable section 23 is located above the fixed section 22 and is slidably connected to it to allow for height adjustment of the adjustable section 23 relative to the fixed section 22, thereby adjusting the height of the auxiliary support rod 20. The fixed section 22 is provided with a third locking component 80 to position the adjustable section 23 in the adjusted position after it has been adjusted to the correct position.

[0061] Specifically, the adjustable section 13 of the main support rod and the adjustable section 23 of the auxiliary support rod are cylindrical rods. The fixed section 12 of the main support rod has a cylindrical tube 14, and the fixed section 22 of the auxiliary support rod also has a cylindrical tube. The adjustable section 13 of the main support rod is inserted into the cylindrical tube 14 of the fixed section 12 of the main support rod, and the adjustable section 23 of the auxiliary support rod is inserted into the cylindrical tube of the fixed section 22 of the auxiliary support rod. The height of the main support rod 10 and the auxiliary support rod 20 can be adjusted by inserting and pulling the adjustable section 13 of the main support rod and the adjustable section 23 of the auxiliary support rod.

[0062] Of course, the main support rod fixed section 12 and the main support rod adjustable section 13, the auxiliary support rod fixed section 22 and the auxiliary support rod adjustable section 23 can also adopt other sliding connection structures, which will not be elaborated here.

[0063] For the second locking component 70, it can be a locking screw. The main support rod fixed section 12 has multiple threaded holes 15 arranged vertically at intervals along its upper edge. The main support rod adjustable section 13 is provided with a corresponding threaded hole (not shown). The main support rod adjustable section 13 is raised and lowered relative to the main support rod fixed section 12 to a suitable height. The threaded hole on the main support rod adjustable section 13 is aligned with the corresponding threaded hole 15 on the main support rod fixed section 12. Then, the locking screw is tightened to fix the main support rod adjustable section 13.

[0064] Similarly, the third locking component 80 is also a locking screw. The upper edge of the fixed section 22 of the auxiliary support rod has multiple threaded holes at vertical intervals, and the adjustable section 23 of the auxiliary support rod has one threaded hole. After the threaded hole on the adjustable section 23 of the auxiliary support rod is aligned with the threaded hole on the fixed section 22 of the auxiliary support rod, the locking screw is tightened to fix the adjustable section 23 of the auxiliary support rod.

[0065] Furthermore, the adjustable section 13 of the main support rod is provided with scale lines 90 distributed in the vertical direction, and the adjustable section 23 of the auxiliary support rod is provided with corresponding scale lines 90 distributed in the vertical direction, so as to achieve more accurate height adjustment.

[0066] In some embodiments of this utility model, a plurality of base threaded holes 31 arranged in a rectangular array are formed on the base 30. A first stud 17 is formed at the bottom end of the main support rod 10 (specifically, at the bottom end of the main support rod fixing section 12), and the first stud 17 is threadedly connected to one of the base threaded holes a. A second stud (not shown) is formed at the bottom end of the auxiliary support rod 20 (specifically, at the bottom end of the auxiliary support rod fixing section 22), and the second stud is threadedly connected to one of the base threaded holes b. That is, the first stud 17 and the second stud are threadedly connected to different base threaded holes 31, so that the main support rod 10 and the auxiliary support rod 20 are spaced apart on the base 30.

[0067] By arranging several threaded holes 31 on the base 30, the main support rod 10 and auxiliary support rod 20 are threadedly connected to the base 30. This allows for convenient adjustment of the positions of the main support rod 10 and auxiliary support rod 20 according to the actual workpiece measurement needs, to accommodate the workpiece clamping. Simultaneously, the base 30 can be fixed to the measuring machine's worktable 4.1 by connecting some of the threaded holes 31 on the base 30 to the threaded holes on the measuring machine's worktable 4.1 using screws. Figure 8 As shown, this facilitates the assembly and disassembly of the entire femoral condyle prosthesis workpiece fixture 3 on the measuring machine worktable 4.1.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A femoral condyle prosthesis workpiece clamp, characterized in that, include: Base; A main support rod is erected on the base. A clamping block is fixed to the top of the main support rod. An insertion hole for inserting the first pin of the femoral condyle prosthesis is formed on the clamping block. A first locking component is provided on the clamping block for locking the first pin in the insertion hole. An auxiliary support rod is erected on the base and spaced horizontally from the main support rod. The auxiliary support rod is used to support the second pin of the femoral condyle prosthesis workpiece.

2. The femoral condyle prosthesis workpiece fixture according to claim 1, characterized in that, The axis of the insertion hole is a horizontal axis, the auxiliary support rod has a horizontal support top surface, and the second insertion pin is horizontally supported on the horizontal support top surface.

3. The femoral condyle prosthesis workpiece fixture according to claim 2, characterized in that, The clamping block has a first threaded hole that is perpendicularly connected to the insertion hole. The axis of the first threaded hole is a horizontal axis. The first locking component is a ball head bolt that mates with the first threaded hole.

4. The femoral condyle prosthesis workpiece fixture according to claim 3, characterized in that, The clamping block has a second threaded hole that is perpendicularly connected to the first threaded hole. The axis of the second threaded hole is a vertical axis. An anti-loosening screw is installed in the second threaded hole, and the anti-loosening screw abuts against the first locking component.

5. The femoral condyle prosthesis workpiece fixture according to claim 4, characterized in that, Multiple first locking components are arranged horizontally, and each anti-loosening top screw corresponds to one of the first locking components.

6. The femoral condyle prosthesis workpiece fixture according to claim 1, characterized in that, The main support rod has a horizontal mounting top surface with a threaded mounting hole. The clamping block has a horizontal bottom surface with a connecting stud formed thereon. The connecting stud is threaded into the threaded mounting hole, and the horizontal bottom surface is in contact with the horizontal mounting top surface.

7. The femoral condyle prosthesis workpiece fixture according to claim 1, characterized in that, The main support rod includes a fixed section and an adjustable section. The adjustable section is slidably connected to the fixed section to achieve lifting and lowering adjustment. The fixed section is provided with a second locking component for locking the adjustable section. The auxiliary support rod includes a fixed section and an adjustable section. The adjustable section is slidably connected to the fixed section to achieve lifting and lowering adjustment. The fixed section is provided with a third locking component for locking the adjustable section.

8. The femoral condyle prosthesis workpiece fixture according to claim 7, characterized in that, The adjustable section of the main support rod is provided with scale lines distributed in the vertical direction, and the adjustable section of the auxiliary support rod is provided with corresponding scale lines distributed in the vertical direction.

9. The femoral condyle prosthesis workpiece fixture according to claim 1, characterized in that, The base has a plurality of threaded holes arranged in a rectangular array. The bottom end of the main support rod has a first stud, which is threadedly connected to one of the threaded holes a. The bottom end of the auxiliary support rod has a second stud, which is threadedly connected to one of the threaded holes b.

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