A kind of grinding head blade strength testing device for orthopaedic surgical cutter

Abstract

The utility model discloses a kind of grinding head blade part strength testing devices for orthopedics surgical knives, including base assembly, test frame assembly and counterweight assembly.The base assembly includes bottom plate, and the bracket main body fixed on bottom plate.The test frame assembly includes knife mounting bracket and locking block.The knife mounting bracket is slidably connected on bracket main body.Installation groove that is matched with test knife is set on knife mounting bracket.Locking block is fixed in the notch of installation groove by screw.The counterweight assembly is connected between knife mounting bracket by transmission mechanism, and can provide upward tension to knife mounting bracket.The utility model uses high-precision precision guide rail and bearing structure design, simultaneously uses low impedance transmission cable to transmit the force of counterweight assembly to knife mounting bracket, realizes the real-time, accurate load required to be transmitted to grinding head test site, improves the accuracy and reliability of experiment.

Description

Technical Field

[0001] This utility model belongs to the field of surgical instrument technology, specifically relating to a device for testing the strength of the grinding head edge of orthopedic surgical instruments. Background Technology

[0002] In minimally invasive orthopedic surgery, electrically powered bone-powered surgical burrs are widely used due to their high efficiency and precision. However, the strength of the burr's cutting edge is a key factor affecting the safety and outcome of the surgery.

[0003] In existing technologies, the most common method for testing the strength of the grinding head cutting edge is to suspend a weight at the tip of the tool. This applies downward pressure to the tool by the suspended weight, simulating the tool's condition during use, thus allowing the strength of the grinding head cutting edge to be tested.

[0004] In the current testing method, the weight suspended on the cutting tool is prone to swaying under the influence of external factors, leading to errors in the final test results. Furthermore, the swaying weight is susceptible to collision with the cutting tool, posing a safety hazard. Therefore, there is an urgent need for an experimental device that can accurately and efficiently test the strength of the grinding head's cutting edge. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, this utility model provides a device for testing the strength of the cutting edge of an orthopedic surgical instrument, thereby solving the technical problem of low accuracy in testing the cutting edge of existing surgical instruments.

[0006] To achieve the above objectives, the specific technical solution of this utility model is as follows:

[0007] A device for testing the cutting edge strength of orthopedic surgical instruments includes a base assembly, a test frame assembly, and a counterweight assembly. The base assembly includes a base plate and a support body fixed to the base plate.

[0008] The test fixture assembly includes a tool mounting bracket and a locking block. The tool mounting bracket is slidably connected to the support body. The tool mounting bracket has mounting slots for mates with test tools. The locking block is fixed to the opening of the mounting slot by screws.

[0009] The counterweight assembly is connected to the tool mounting bracket via a transmission mechanism, which can provide an upward pulling force to the tool mounting bracket.

[0010] Furthermore, the tool mounting bracket is fixed with a guide rail slider. The main body of the bracket is provided with a precision guide rail that mates with the guide rail slider. The guide rail slider and the precision guide rail slide in contact. Limiting blocks are spaced apart below the precision guide rail.

[0011] Furthermore, the tool mounting bracket is divided into a support portion and a mounting portion. The support portion has a right-angled triangular structure. The mounting portion is located on the hypotenuse of the support portion.

[0012] Furthermore, a support rod is fixed to the bottom edge of the support portion. The outer end of the support rod is fixed to the mounting portion. A triangular structure is formed between the bottom edge of the support portion, the support rod, and the mounting portion.

[0013] Furthermore, the transmission mechanism includes a crossbeam, a transmission cable, and two bearings. The crossbeam is fixed to the top of the support body. Both bearings are mounted on the crossbeam, forming a fixed pulley structure with the transmission cable. One end of the transmission cable is connected to the guide rail slider, and the other end is connected to the counterweight assembly.

[0014] Furthermore, both ends of the transmission cable are equipped with hook-shaped claws. A cable hook that mates with the claws is fixed on the tool mounting bracket. The tool mounting bracket is hung on the corresponding claw hook of the transmission cable via the cable hook.

[0015] Furthermore, the counterweight assembly includes a hanging rod and a counterweight block. The top of the hanging rod is connected to the corresponding end of the transmission cable. The counterweight block is mounted on the hanging rod.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. High accuracy: This utility model adopts a high-precision guide rail and bearing structure design, and uses a low-resistance transmission cable to transmit the force of the counterweight component to the tool mounting bracket, realizing the real-time and accurate transmission of the required load to the grinding head test part, thus improving the accuracy and reliability of the experiment.

[0018] 2. Easy to operate: This utility model uses a hanging rod and a counterweight to form a counterweight assembly. During the test, the tester can change the counterweight of the corresponding weight according to the required test load on the test tool, which can easily realize the testing of different loads. The operation is simple and quick.

[0019] 3. Simple structure: This utility model features hook-shaped claws at both ends of the transmission cable. Simultaneously, cable hooks that mate with the claws are fixed on the tool mounting bracket. During installation, the tool mounting bracket and the transmission cable are connected via cable hooks attached to the corresponding claws, making the entire device easy to install and disassemble, and convenient for maintenance.

[0020] 4. High durability: The base plate and support body of this utility model are made of stainless steel, which makes it have excellent stability and durability, and can support the weight and load of the entire device for a long time. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a schematic diagram showing the relative positions of the test frame assembly and the counterweight assembly in this utility model;

[0023] Figure 3 This is a schematic diagram of the transmission mechanism in this utility model. Figure 2 (Enlarged view of part A in the middle)

[0024] Figure 4 This is a schematic diagram showing the relative positions of the counterweight component and the transmission mechanism in this utility model;

[0025] Figure 5 This is a schematic diagram of the counterweight component in this utility model. Figure 4 (Enlarged view of part B in the middle section).

[0026] Reference numerals in the attached drawings: 1. Test frame assembly; 2. Counterweight assembly; 3. Base plate; 4. Support body; 5. Transmission mechanism; 6. Tool mounting bracket; 6-1. Support part; 6-2. Mounting part; 7. Guide rail slider; 8. Locking block; 9. Precision guide rail; 10. Limiting block; 11. Support rod; 12. Crossbeam; 13. Transmission cable; 14. Bearing; 15. Hanging rod; 16. Counterweight block. Detailed Implementation

[0027] In the description of this utility model, it should be understood that the terms "one end", "the other end", "outer side", "upper side", "inner side", "horizontal", "coaxial", "center", "end", "length", "outer end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] The present invention will be further described below with reference to the accompanying drawings.

[0029] like Figure 1 and 2 As shown, a device for testing the cutting edge strength of orthopedic surgical instruments includes a base assembly, a test frame assembly 1, and a counterweight assembly 2. The base assembly includes a base plate 3 and a support body 4 fixed to the base plate 3. The test frame assembly 1 is slidably connected to the support body 4 and can slide downwards under gravity to provide a test load to the test instrument fixed to the test frame assembly 1. The counterweight assembly is connected to the test frame assembly 1 via a transmission mechanism 5, which provides an upward pulling force to the test frame assembly 1, thereby controlling the magnitude of the test load provided by the test frame to the test instrument.

[0030] like Figure 2 and 3 As shown, the test fixture assembly 1 includes a tool mounting bracket 6, a guide rail slider 7, and a locking block 8. The tool mounting bracket 6 is slidably connected to the support body 4 via the guide rail slider 7. The tool mounting bracket 6 has a mounting groove for mates with the test tool. The locking block 8 is fixed to the opening of the mounting groove with screws. When the tester places the test tool in the mounting groove, the tester secures the tool by fixing the locking block 8, thus preventing the test tool from detaching from the tool mounting bracket 6 during testing.

[0031] In this embodiment, as Figure 3 As shown, both the base plate 3 and the main body of the support 4 are made of stainless steel, giving them stability and durability. The main body of the support 4 is equipped with a precision guide rail 9 that mates with the guide rail slider 7. The guide rail slider 7 slides in conjunction with the precision guide rail 9. Limiting blocks 10 are spaced apart below the precision guide rail 9. The limiting blocks 10 limit the downward sliding position of the guide rail slider 7, thereby preventing the test tool tip and tool mounting bracket 6 from deforming due to impact with the base plate 3.

[0032] Furthermore, the tool mounting bracket 6 is divided into a support part 6-1 and a mounting part 6-2. The support part 6-1 has a right-angled triangular structure. The mounting part 6-2 is located on the hypotenuse of the support part 6-1, with an angle of 45° between it and the base plate. During testing, the mounting part 6-2 provides stable support through the support part 6-1.

[0033] Furthermore, a support rod 11 is fixed to the bottom edge of the support part 6-1. The outer end of the support rod 11 is fixed to the mounting part 6-2. A triangular structure is formed between the bottom edge of the support part 6-1, the support rod 11, and the mounting part 6-2, further ensuring the stability of the test tool during testing.

[0034] like Figure 3 and 4 As shown, the transmission mechanism 5 includes a crossbeam 12, a transmission cable 13, and two bearings 14. The crossbeam 12 is fixed to the top of the support body 4. The two bearings 14 are respectively installed at both ends of the crossbeam 12, forming a fixed pulley structure with the transmission cable 13. One end of the transmission cable 13 is connected to the guide rail slider 7, and the other end is connected to the counterweight assembly. Through the fixed pulley assembly formed by the transmission cable 13 and the two bearings 14, the downward force applied by the counterweight assembly is converted into an upward force applied to the tool mounting bracket 6, thereby precisely controlling the test load provided to the test tool.

[0035] In this embodiment, both ends of the transmission cable 13 are provided with hook-shaped claws. The tool mounting bracket 6 is fixed with cable hooks that cooperate with the claws. During installation, the tool mounting bracket 6 and the transmission cable 13 are connected by the cable hooks and hung on the corresponding claws, thereby realizing a quick connection between the transmission cable 13 and the tool mounting bracket 6.

[0036] like Figure 4 and 5 As shown, the counterweight assembly includes a hanging rod 15 and a counterweight block 16. The top of the hanging rod 15 is connected to the corresponding end of the transmission cable 13. The counterweight block 16 is mounted on the hanging rod 15. During the test, the counterweight block 16 is replaced with one of corresponding weights according to the required test load applied to the test tool.

[0037] The specific operating procedure is as follows: When the test load required to be applied to the test tool is F, the test tool is mounted on the test frame assembly. The total weight of the test tool and the test frame assembly is measured as G1. The counterweight block mounted on the other end of the transmission cable has a weight of G2. Wherein, counterweight G2 = G1 - F. The test personnel place the counterweight block of weight G2 on the counterweight frame and conduct the blade strength test.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A grinding head blade strength testing device for orthopedic surgical cutters, comprising a base assembly; the base assembly comprising a base plate (3) and a support body (4) fixed to the base plate (3), characterized in that: It also includes a test fixture assembly (1) and a counterweight assembly (2); The test fixture assembly (1) includes a tool mounting bracket (6) and a locking block (8); the tool mounting bracket (6) is slidably connected to the support body (4); the tool mounting bracket (6) has a mounting groove that mates with the test tool; the locking block (8) is fixed at the opening of the mounting groove; The counterweight assembly is connected to the tool mounting bracket (6) via a transmission mechanism (5) and can provide an upward pulling force to the tool mounting bracket (6).

2. The device for testing the cutting edge strength of a grinding head for orthopedic surgical instruments according to claim 1, characterized in that: The tool mounting bracket (6) is fixed with a guide rail slider (7); the bracket body (4) is provided with a precision guide rail (9) that cooperates with the guide rail slider (7); the guide rail slider (7) and the precision guide rail (9) are in sliding cooperation; and limit blocks (10) are provided at intervals below the precision guide rail (9).

3. The device for testing the cutting edge strength of a grinding head for orthopedic surgical instruments according to claim 1, characterized in that: The tool mounting bracket (6) is divided into a support part (6-1) and a mounting part (6-2); the support part (6-1) has a right-angled triangular structure; the mounting part (6-2) is located on the hypotenuse of the support part (6-1).

4. The device for testing the cutting edge strength of a grinding head for orthopedic surgical instruments according to claim 3, characterized in that: A support rod (11) is fixed on the bottom edge of the support part (6-1); the outer end of the support rod (11) is fixed to the mounting part (6-2); a triangular structure is formed between the bottom edge of the support part (6-1), the support rod (11) and the mounting part (6-2).

5. The device for testing the cutting edge strength of a grinding head for orthopedic surgical instruments according to claim 1, characterized in that: The transmission mechanism (5) includes a crossbeam (12), a transmission cable (13), and a bearing (14); the crossbeam (12) is fixed on the top of the support body (4); the bearing (14) is rotatably connected to the crossbeam (12) and can cooperate with the transmission cable (13) to form a fixed pulley structure; one end of the transmission cable (13) is connected to the guide rail slider (7), and the other end is connected to the counterweight assembly.

6. The device for testing the cutting edge strength of a grinding head for orthopedic surgical instruments according to claim 5, characterized in that: Both ends of the transmission cable (13) are provided with hook-shaped claws; the tool mounting bracket (6) is fixed with a cable hook that cooperates with the claw; the tool mounting bracket (6) is hung on the claw hook on the corresponding side of the transmission cable (13) through the cable hook.

7. The device for testing the cutting edge strength of a grinding head for orthopedic surgical instruments according to claim 5, characterized in that: The counterweight assembly includes a hanging rod (15) and a counterweight block (16); the top of the hanging rod (15) is connected to the corresponding side end of the transmission cable (13); the counterweight block (16) is installed on the hanging rod (15).

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