Orthopedic femoral stem ridge surface groove milling tool

Abstract

The utility model discloses an orthopaedic femoral stem ridge surface groove milling tool which comprises a base and an upper positioning piece, a positioning block is installed at the top end of the base, a rotating piece assembly is rotatably installed at the end, located at the positioning block, of the base, and a front fixing block assembly is installed on the upper portion of the rotating piece assembly. A rear fixing block assembly is adjustably installed at the end, away from the rotating piece assembly, of the positioning block. According to the utility model, in the whole machining process of the ridge surface grooves on the two sides of the femoral stem, the tool does not need to be disassembled and replaced, and secondary clamping is not needed, so that the time for replacing the tool and the secondary clamping is shortened, the tool cost and the machining time are reduced, secondary clamping is not needed, the machining precision is improved, and the efficiency of the whole machining process is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of femoral stem milling ridge surface grooves, in particular to an orthopedic femoral stem milling ridge surface groove tooling fixture. Background Art

[0002] At present, most of the existing orthopedic femoral stem milling ridge surface groove tooling fixtures mill the two-sided ridge surface grooves in two separate milling processes. After machining one side of the ridge surface groove, the femoral stem needs to be removed, the machining tooling fixture needs to be replaced, and after secondary clamping, the other side of the ridge surface groove can be machined again. It requires two separate clamps and two machining processes, which affects the machining efficiency of the orthopedic femoral stem ridge surface groove and increases the machining cost. Content of the Utility Model

[0003] The purpose of the utility model is to provide an orthopedic femoral stem milling ridge surface groove tooling fixture to solve the problems in the prior art.

[0004] To achieve the above purpose, the utility model provides the following technical solution: an orthopedic femoral stem milling ridge surface groove tooling fixture, including a base and an upper positioning member. A positioning block is installed at the top of the base. A rotating member assembly is rotatably installed at one end of the base relative to the positioning block. A front fixing block assembly is installed on the upper part of the rotating member assembly. A rear fixing block assembly is adjustably installed at one end of the positioning block away from the rotating member assembly.

[0005] Preferably, the positioning block is fixed to the base by bolts. A fixing protrusion is provided at the top of the positioning block, and a fixing protrusion is provided at the bottom of the upper positioning member.

[0006] Preferably, the positioning block is provided with a sliding groove, and the rear fixing block assembly includes a slider that cooperates with the sliding groove.

[0007] Preferably, the cross-sectional shapes of the sliding groove and the slider are both inverted T-shaped structures.

[0008] Preferably, the rotating member assembly includes a lower rotating member shaft, a ball head spring plug, and an upper rotating member shaft. A lower bearing is installed on the lower rotating member shaft, and an upper bearing is installed on the upper rotating member shaft;

[0009] The base is provided with a first shaft groove that cooperates with the lower bearing, a first positioning hole and a second positioning hole that cooperate with the ball head spring plug, and the positioning block is provided with a second shaft groove that cooperates with the upper bearing.

[0010] Preferably, the positioning block is provided with a clearance groove that cooperates with the front fixing block assembly, and the clearance groove is in an arc-shaped structure.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows: When machining the ridge surface grooves on both sides of the femoral stem, after installing the femoral stem at the corresponding positions of the positioning block assembly and the upper positioning block, and firmly fixing it by the front fixing block assembly and the rear fixing block assembly, rotate the rotating part assembly to the left positioning hole, the ball head spring plug falls into the left positioning hole of the base, and then start machining the ridge surface groove on the right side of the femoral stem. After the machining is completed, rotate the rotating part assembly to make the ball head spring plug fall into the right positioning hole of the base, and start machining the ridge surface groove on the left side of the femoral stem; During the entire machining process of the ridge surface grooves on both sides of the femoral stem, there is no need to disassemble the tooling, replace the tooling, or perform secondary clamping, which reduces the time for replacing the tooling and secondary clamping, reduces the tooling cost and machining time, eliminates the need for secondary clamping, improves the machining accuracy, and improves the efficiency of the entire machining process. Brief Description of the Drawings

[0012] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model. In the drawings:

[0013] Figure 1 is a schematic structural view of the present utility model;

[0014] Figure 2 is a schematic structural view of the present utility model with the positioning block removed;

[0015] Figure 3 is a schematic structural view of the base of the present utility model;

[0016] Figure 4 is a schematic structural view of the positioning block of the present utility model;

[0017] Figure 5 is the present utility model Figure 4 schematic structural view from the bottom perspective;

[0018] Figure 6 is a schematic structural view of the rotating part assembly of the present utility model;

[0019] Figure 7 is a schematic structural view of the present utility model during use.

[0020] In the drawings: 1. Base; 2. Positioning block; 3. Rotating part assembly; 4. Front fixing block assembly; 5. Upper positioning part; 6. Rear fixing block assembly; 11. First shaft groove; 12. First positioning hole; 13. Second positioning hole; 21. Second shaft groove; 22. Relief groove; 23. Fixed protrusion; 24. Slide groove; 31. Lower rotating part shaft; 32. Lower bearing; 33. Ball head spring plug; 34. Upper rotating part shaft; 35. Upper bearing. Detailed Embodiment

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model. Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model.

[0022] Please refer to Figures 1-7 , in an embodiment of the present utility model, an orthopedic femoral stem milling ridge surface groove tooling includes a base 1 and an upper positioning member 5. A positioning block 2 is installed at the top end of the base 1. A rotating member assembly 3 is rotatably installed at one end of the base 1 where the positioning block 2 is located. A front fixing block assembly 4 is installed on the upper part of the rotating member assembly 3. A rear fixing block assembly 6 is adjustably installed at one end of the positioning block 2 away from the rotating member assembly 3. The upper positioning member 5 is provided with a front fixing block assembly positioning hole and a rear fixing block assembly positioning hole. The front end guide post of the front fixing block assembly 4 and the rear fixing block assembly 5 is placed into the positioning block to confirm the positioning. After adjusting the position, it is locked and fixed by screws.

[0023] The positioning block 2 is provided with a clearance groove 22 that cooperates with the front fixing block assembly 4. The clearance groove 22 is an arc-shaped structure, and the clearance groove 22 restricts the rotation path of the rotating member assembly.

[0024] The positioning block 2 is fixed to the base 1 by bolts. A fixing protrusion 23 is provided at the top of the positioning block 2, and a fixing protrusion 23 is provided at the bottom of the upper positioning member 5. The positioning block 2 is provided with a sliding groove 24. The rear fixing block assembly 6 includes a slider that cooperates with the sliding groove 24. The front end guide post of the rear fixing block assembly 6 and the rear fixing block assembly positioning hole on the upper positioning block 5 determine the positioning. The position can be adjusted by cooperating with the slider. After determining that the installation is in place, it is locked and fixed by screws. The cross-sectional shapes of the sliding groove 24 and the slider are both inverted T-shaped structures.

[0025] The rotating component assembly 3 includes a lower rotating shaft 31, a ball head spring plug 33, and an upper rotating shaft 34. A lower bearing 32 is installed on the lower rotating shaft 31, and an upper bearing 35 is installed on the upper rotating shaft 34. The base 1 is provided with a first shaft groove 11 that cooperates with the lower bearing 32, a first positioning hole 12 and a second positioning hole 13 that cooperate with the ball head spring plug 33. The positioning block 2 is provided with a second shaft groove 21 that cooperates with the upper bearing 35. The first shaft groove 11 cooperates with the lower rotating shaft 31 and the lower bearing 32, enabling the entire rotating shaft assembly to rotate. The first positioning hole 12 and the second positioning hole 13 cooperate with the ball head spring plug 33, which can determine the accurate position when the rotating component assembly rotates in place, ensuring firm fixation and not affecting the machining process of the femoral stem ridge surface groove. The rotating shaft groove 21 of the positioning block assembly cooperates with the upper rotating shaft 34 and the upper bearing 35, enabling the entire rotating shaft assembly to rotate. The fixing protrusion 23 confirms the installation and fixing position of the femoral stem, ensuring the machining accuracy. The sliding groove 24 ensures the proper installation of the rear positioning block assembly. The lower rotating shaft 31 and the lower bearing 32 cooperate with the first shaft groove 11, and the lower rotating shaft 34 and the bearing 35 cooperate with the rotating shaft groove 21 of the positioning block assembly, causing the entire rotating component assembly to rotate. The ball head spring plug 33 cooperates with the first positioning hole 12 and the second positioning hole 13 to confirm the accurate rotation in place and firm positioning.

[0026] The working principle of the present utility model is as follows: Place the femoral stem at the corresponding positions of the positioning block assembly and the upper positioning block, and fasten and fix it by the front fixing block assembly and the rear fixing block assembly. Rotate the rotating component assembly to the left positioning hole, and the ball head spring plug drops into the first positioning hole, then start machining the right ridge surface groove of the femoral stem. After the machining is completed, rotate the rotating component assembly to make the ball head spring plug drop into the second positioning hole of the base, and start machining the left ridge surface groove of the femoral stem.

[0027] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An orthopedic femoral stem milling ridge groove tool, comprising a base (1) and an upper positioning member (5), characterized in that: A positioning block (2) is installed at the top of the base (1); a rotating member assembly (3) is rotatably installed on one end of the base (1) located on the positioning block (2); a front fixed block assembly (4) is installed on the upper part of the rotating member assembly (3); and a rear fixed block assembly (6) is adjustably installed on one end of the positioning block (2) away from the rotating member assembly (3).

2. The orthopedic femoral stem milling ridge groove tool according to claim 1, characterized in that: The positioning block (2) is fixed to the base (1) by means of bolts, a fixing protrusion (23) is provided on the top of the positioning block (2), and a fixing protrusion (23) is provided on the bottom of the upper positioning member (5).

3. The orthopedic femoral stem milling ridge groove tool according to claim 1, characterized in that: The positioning block (2) is provided with a slide groove (24), and the rear fixing block assembly (6) comprises a sliding block matched with the slide groove (24).

4. The tool for milling the ridge groove of the orthopedic femoral stem according to claim 3, characterized in that: The cross-sectional shapes of the slide groove (24) and the sliding block are both inverted T-shaped structures.

5. The tool for milling the ridge groove of an orthopedic femoral stem according to claim 1, characterized in that: The rotating member assembly (3) comprises a lower rotating member shaft (31), a ball head spring plug (33) and an upper rotating member shaft (34); the lower rotating member shaft (31) is provided with a lower bearing (32), and the upper rotating member shaft (34) is provided with an upper bearing (35); The base (1) is provided with a first shaft groove (11) cooperating with a lower bearing (32), the base (1) is provided with a first positioning hole (12) and a second positioning hole (13) cooperating with a ball head spring plug (33), and the positioning block (2) is provided with a second shaft groove (21) cooperating with an upper bearing (35).

6. The tool for milling the ridge groove of an orthopedic femoral stem according to claim 1, characterized in that: The positioning block (2) is provided with a clearance groove (22) that cooperates with the front fixing block assembly (4), and the clearance groove (22) is an arc-shaped structure.

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