Rotational speed testing tool for medical power handle

Abstract

The utility model provides a kind of rotational speed test tool of medical power handle, including support seat, the inside of support seat is equipped with installation cavity;Transmission shaft, the transmission shaft is rotatably installed on support seat, and pass through the installation cavity, one end of the transmission shaft has the connecting portion for accessing medical power handle;Magnetic piece, it is set on the transmission shaft, and located in the installation cavity;Hall plate, the hall plate is installed on the support seat, and at least part is located in the installation cavity, at least one hall sensor is equipped on the hall plate, the hall sensor is inlaid in the installation cavity, and located on the outside of the magnetic piece.The utility model can solve the technical problem that prior art cannot satisfy the accurate, direct measurement of rotational speed under high rotational speed.

Description

Technical Field

[0001] This utility model relates to the field of medical power handle speed measurement technology, and in particular to a speed testing fixture for a medical power handle. Background Technology

[0002] A surgical power unit is a medical device used in surgical procedures to drill, mill, saw, grind, shave, and plan human bone and / or soft tissues. As a crucial component of the surgical power unit, the motor speed test of the medical power handpiece is critical to ensuring surgical efficiency and safety. Accurately detecting whether the speed meets the standards can avoid risks such as low surgical efficiency and tissue damage caused by abnormal speed, ensuring stable equipment performance, compliance with medical standards, and building a strong defense for surgical precision and patient safety.

[0003] In the existing technology, the torque of the motor of the medical power handpiece is tested at the same time using a speed and torque sensor. However, the speed and torque sensor needs to bear a load when testing the torque, which makes the overall structure more complex. This results in slow response speed, poor accuracy and low resolution of speed testing, and the test results are prone to errors. Summary of the Invention

[0004] This invention provides a speed testing fixture for a medical power handpiece, which solves the technical problems of slow response speed, poor accuracy and low resolution in the existing technology for testing the motor speed of a medical power handpiece.

[0005] This utility model provides a speed testing fixture for a medical power handle, comprising:

[0006] The support base has an internal mounting cavity;

[0007] A drive shaft is rotatably mounted on a support base and passes through the mounting cavity. One end of the drive shaft is provided with a connecting part for connecting to a medical power handle to be tested.

[0008] A magnetic component is disposed on the drive shaft and located within the mounting cavity;

[0009] A Hall plate is mounted on the support and is at least partially located within the mounting cavity. The Hall plate is provided with at least one Hall sensor, which extends into the mounting cavity and is located outside the magnetic component.

[0010] In one embodiment of the present invention, the Hall plate is provided with a plurality of Hall sensors, which are evenly distributed circumferentially on the outer side of the transmission shaft.

[0011] In one embodiment of this utility model, three Hall sensors are provided.

[0012] In one embodiment of the present invention, the interior of the mounting cavity is provided with a positioning step for positioning the Hall plate.

[0013] In one embodiment of the present invention, the rotation speed testing fixture of the medical power handle further includes a potting retainer ring disposed in the mounting cavity. The potting retainer ring is located between the Hall sensor and the magnetic component. The potting retainer ring, the Hall plate, and the inner wall of the mounting cavity enclose a potting cavity for accommodating the Hall sensor. The potting cavity is filled with potting adhesive for encapsulating the Hall sensor.

[0014] In one embodiment of the present invention, the support base includes a base body and a cover, and the transmission shaft is rotatably mounted on the base body and the cover via bearings.

[0015] In one embodiment of the present invention, the speed testing fixture for the medical power handle further includes a positioning bushing, which is sleeved on the transmission shaft and covers the outside of the magnetic component. The positioning bushing is positioned in contact with the bearing on the base.

[0016] In one embodiment of the present invention, the base is provided with a lateral opening, the lateral opening is connected to the mounting cavity, and the Hall plate extends out from the lateral opening.

[0017] In one embodiment of this utility model, the magnetic component is a magnetic steel ring or a plurality of magnetic steel blocks surrounding the transmission shaft.

[0018] In one embodiment of the present invention, the speed testing fixture for the medical power handle further includes a standard rod, the first end of which is used to connect to the medical power handle, and the second end of which is used to connect to the connecting part of the transmission shaft.

[0019] The beneficial effects of this utility model are as follows: This utility model proposes a speed testing fixture for a medical power handle. A support base provides support for the drive shaft and Hall plate. The drive shaft carries the power output from the power handle motor, causing a magnetic component to rotate. The magnetic component and a Hall sensor on the Hall plate generate a pulse signal through the Hall effect. The Hall plate outputs this pulse signal and converts it to obtain the speed of the drive shaft. In this technical solution, the drive shaft does not bear torque; the speed is directly measured by the Hall sensor. The Hall sensor's response time to changes in the magnetic field is on the order of microseconds, thus achieving rapid response, high precision, and high resolution for detecting the speed of the medical power handle motor, meeting the requirements for direct measurement of the speed of the medical power handle motor. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0021] In the attached diagram:

[0022] Figure 1 An exploded view of a speed testing fixture for a medical power handle provided in an embodiment of this utility model;

[0023] Figure 2 This is a side view of the rotation speed testing fixture for a medical power handle provided in one embodiment of the present invention;

[0024] Figure 3 for Figure 2 Sectional view along axis AA;

[0025] Figure 4 This is a schematic diagram illustrating an embodiment of the present invention connected to a power handle under test for speed testing.

[0026] The attached figures are labeled as follows:

[0027] 101, seat cover 102, mounting cavity 103, positioning step 104, side opening 105, bearing 106, drive shaft 201, magnetic component 202, positioning bushing 203, connecting part 204, Hall plate 301, Hall sensor 302, potting retaining ring 401, standard rod 501, and power handle to be tested 601. Detailed Implementation

[0028] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0029] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0030] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present invention.

[0031] See Figure 1 , Figure 1 This utility model provides a speed testing fixture for a medical power handpiece, used for power transmission and speed measurement of the motor of the medical power handpiece. It includes:

[0032] The support base has an internal mounting cavity 103;

[0033] The drive shaft 201 is rotatably mounted on the support base and passes through the mounting cavity 103. One end of the drive shaft 201 is provided with a connecting part for connecting the medical power handle to be tested. The connecting part can be a keyway, spline, slotted opening or other structure for shaft end connection opened at one end of the drive shaft 201.

[0034] The magnetic component 202 is disposed on the drive shaft 201 and located inside the mounting cavity 103;

[0035] Hall plate 301 is mounted on a support base and is at least partially located in the mounting cavity 103. Hall plate 301 is provided with at least one Hall sensor 302, which extends into the mounting cavity 103 and is located outside the magnetic component 202.

[0036] In this embodiment, the support base serves as the outer shell to support and protect the internal drive shaft 201, Hall plate 301, etc. The drive shaft 201 is supported by the support base and can rotate freely. The drive shaft 201 rotates due to the power output from the power handle motor, and the magnetic component 202 rotates with the drive shaft 201. During the rotation of the magnetic component 202, the Hall sensor 302 outputs a pulse signal every time it passes the Hall sensor 302. The Hall sensor 302 responds to changes in the magnetic field at the microsecond level. Therefore, in this embodiment, the Hall sensor 302 can measure the rotational speed of the magnetic component 202 as it rotates with the drive shaft 201 in a timely and accurate manner, even when the power handle motor is outputting at high speed.

[0037] It should be noted that in this embodiment, the Hall plate 301 is provided with multiple Hall sensors 302, which are evenly distributed circumferentially on the outer side of the drive shaft 201. The cooperation of multiple Hall sensors 302 can improve the accuracy and stability of speed detection through multi-dimensional signal acquisition.

[0038] For example, in this embodiment, three Hall sensors 302 are provided. In this embodiment, the three Hall sensors 302 are arranged around and evenly distributed on the outside of the drive shaft 201 and aligned with the magnetic component 202. The three Hall sensors 302 are distributed at 120° intervals on the outside. The three Hall sensors 302 synchronously output three sets of pulse signals, which can be cross-verified to eliminate errors, significantly improve detection accuracy, determine the direction of rotation of the shaft, enhance anti-interference and fault tolerance capabilities, and adapt to a wide speed range, meeting the high requirements for reliability and accuracy under different speed conditions.

[0039] See Figure 2 , Figure 3 For example, in this embodiment, the mounting cavity 103 is provided with a positioning step 104 for positioning the Hall plate 301. During the installation of the Hall plate 301, the Hall sensor 302 can be directly positioned on the outside of the magnetic component 202 through the positioning step 104.

[0040] For example, in this embodiment, the speed testing fixture for the medical power handle further includes a potting retainer ring 401 disposed within the mounting cavity 103. The potting retainer ring 401 is located between the Hall sensor 302 and the magnetic component 202. The potting retainer ring 401, the Hall plate 301, and the inner wall of the mounting cavity 103 enclose a potting cavity to accommodate the Hall sensor 302. The potting cavity is filled with potting compound to encapsulate the Hall sensor 302. The potting compound encapsulates and protects the Hall sensor 302, making the Hall sensor 302 less susceptible to external interference and enabling more accurate and reliable speed measurement.

[0041] For example, in this embodiment, the support base includes a base body 101 and a cover 102. The drive shaft 201 is rotatably mounted on the base body 101 and the cover 102 via bearings 106. The split structure design of the support base facilitates the installation of components such as the drive shaft 201, Hall plate 301, and potting retaining ring 401. Both ends of the drive shaft 201 are supported by bearings 106 on the base body 101 and the cover 102, respectively, so that the drive shaft 201 rotates smoothly.

[0042] It is worth noting that in this embodiment, the speed testing fixture for the medical power handle also includes a positioning bushing 203. The positioning bushing 203 is sleeved on the drive shaft 201 and covers the outside of the magnetic component 202. The positioning bushing 203 contacts and positions itself with the bearing 106 on the seat 101, so that the magnetic component 202 is directly positioned at a preset position, thereby enabling the magnetic component 202 and the Hall sensor 302 to be conveniently positioned and aligned.

[0043] For example, in this embodiment, the base 101 is provided with a lateral opening 105, which connects to the mounting cavity 103, and the Hall plate 301 extends out from the lateral opening 105. The lateral opening 105 facilitates the use of a flat plate structure for the Hall plate 301, and allows the Hall plate 301 to extend directly out of the support base.

[0044] It is worth noting that in this embodiment, the magnetic component 202 is a magnetic steel ring or multiple magnetic steel blocks surrounding the transmission shaft 201. Using a magnetic steel ring allows for multi-pole magnetization along the circumference, such as 2 poles, 4 poles, 8 poles, etc. The more poles, the higher the detection accuracy. Adjacent magnetic poles alternate between N and S poles, evenly distributed along the circumference. Thus, when the magnetic steel ring rotates, the Hall sensor 302 alternately detects the N and S pole magnetic fields, thereby outputting periodic high and low level pulses. Alternatively, a structure using multiple magnetic steel blocks distributes multiple magnetic steel blocks around the transmission shaft 201, with adjacent magnetic steel blocks having alternating N and S poles.

[0045] See Figure 4 For example, in this embodiment, the speed testing fixture for the medical power handle also includes a standard rod 501. The first end of the standard rod 501 is used to connect to the medical power handle, and the second end is used to connect to the connecting part 204 of the drive shaft 201. In this embodiment, the speed testing fixture for the medical power handle needs to be connected to the output end of the motor of the power handle 601 under test. This can be achieved by directly connecting the drive shaft 201 to the output end of the motor. However, different models of the power handle 601 motors under test have structural differences in their output ends. Therefore, a standard rod 501 is provided. The standard rod 501 has an end that is directly connected to the drive shaft 201. The other end of the standard rod 501 can be designed with different connection structures according to different power handle 601 motors under test. Thus, when performing speed testing on different models of power handle 601 motors under test, only the corresponding standard rod 501 needs to be matched to connect the motor to the drive shaft 201 and complete the power transmission. This design allows the speed testing fixture for the medical power handpiece of this invention to be compatible with speed testing of different models of medical power handpiece motors, thus possessing versatility. It eliminates the need for repeated transfers and installations of the speed testing fixture, reducing the impact of errors caused by repeated installations on the speed test results.

[0046] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A speed testing fixture for a medical power handle, characterized in that, include: The support base has an internal mounting cavity; A drive shaft is rotatably mounted on a support base and passes through the mounting cavity. One end of the drive shaft is provided with a connecting part for connecting to a medical power handle to be tested. A magnetic component is disposed on the drive shaft and located within the mounting cavity; A Hall plate is mounted on the support and is at least partially located within the mounting cavity. The Hall plate is provided with at least one Hall sensor, which extends into the mounting cavity and is located outside the magnetic component.

2. The speed testing fixture for a medical power handle according to claim 1, characterized in that: The Hall plate is provided with a plurality of Hall sensors, which are evenly distributed circumferentially on the outer side of the drive shaft.

3. The speed testing fixture for a medical power handle according to claim 2, characterized in that: The Hall sensor is provided in three parts.

4. The speed testing fixture for a medical power handle according to claim 3, characterized in that: The mounting cavity is provided with positioning steps for positioning the Hall plate.

5. The speed testing fixture for a medical power handle according to claim 4, characterized in that: The speed testing fixture for the medical power handle also includes a potting retainer ring disposed in the mounting cavity. The potting retainer ring is located between the Hall sensor and the magnetic component. The potting retainer ring, the Hall plate, and the inner wall of the mounting cavity enclose a potting cavity to accommodate the Hall sensor. The potting cavity is filled with potting adhesive to encapsulate the Hall sensor.

6. The speed testing fixture for a medical power handle according to claim 5, characterized in that: The support base includes a base body and a cover, and the drive shaft is rotatably mounted on the base body and the cover via bearings.

7. The speed testing fixture for a medical power handle according to claim 6, characterized in that: The speed testing fixture for the medical power handle also includes a positioning bushing, which is sleeved on the drive shaft and covers the outside of the magnetic component. The positioning bushing is positioned in contact with the bearing on the base.

8. The speed testing fixture for a medical power handle according to claim 7, characterized in that: The base has a lateral opening that connects to the mounting cavity, and the Hall plate extends out from the lateral opening.

9. The speed testing fixture for a medical power handle according to claim 8, characterized in that: The magnetic component is a magnetic ring or multiple magnetic blocks surrounding the drive shaft.

10. The speed testing fixture for a medical power handle according to claim 1, characterized in that: The speed testing fixture for the medical power handle also includes a standard rod, the first end of which is used to connect to the medical power handle, and the second end is used to connect to the connecting part of the drive shaft.

Images