Small grinding drill bit with variable rotating speed and rotating direction

Abstract

The invention provides a small grinding drill bit variable in rotating speed and rotating direction. The small grinding drill bit comprises a grinding drill bit body, a main machine and a driver. A motor forward and reverse rotation Hall control assembly and a motor rotating speed Hall control assembly are arranged in the main machine. The signal input end of the driver is connected with the motor forward and reverse rotation Hall control assembly and the motor rotating speed Hall control assembly, and the output end of the driver is connected with the grinding drill bit body. According to the small grinding drill bit, double adjustment of the rotating speed and the rotating direction can be achieved through the Hall sensor, and implementation of high-precision and high-complexity operations is effectively assisted.

Description

Technical Field

[0001] The invention relates to the technical field of medical instruments, in particular to a small grinding drill with variable rotation speed and steering. Background Art

[0002] Surgical burrs are widely used in neurosurgery, spinal surgery, microsurgery, etc., and usually the bone tissue is ground by the rotation of the cutter head.

[0003] Existing grinding drills can generally only achieve one-way rotation cutting, and the rotation speed cannot be adjusted in real time. Faced with diverse and complex surgical procedures, the existing grinding drills have single functionality and low convenience. Summary of the invention

[0004] The purpose of the invention is to provide a small drill bit capable of realizing dual switching of rotation speed and direction.

[0005] To achieve the above object, the present invention provides a small drill bit with variable speed and direction, comprising a drill bit body, a main machine and a driver;

[0006] The host is equipped with a motor forward and reverse Hall control component and a motor speed Hall control component; the signal input end of the driver is connected to the motor forward and reverse Hall control component and the motor speed Hall control component, and the output end of the driver is connected to the drill bit body.

[0007] Further, the motor forward and reverse Hall control assembly includes a first foot pedal button, a first return spring, a first magnet and a first Hall sensor;

[0008] The bottom of the first pedal button is connected to the first magnet, the first Hall sensor is connected to the motor drive chip in the host, and the first Hall sensor and the first magnet are arranged opposite to each other; the first pedal button is arranged on the surface of the host housing through the first return spring;

[0009] The motor speed Hall control assembly includes a second foot pedal button, a second return spring, a second magnet and a second Hall sensor;

[0010] The bottom of the second pedal button is connected to the second magnet, the second Hall sensor is connected to the motor drive chip in the host, and the second Hall sensor and the second magnet are arranged relative to each other; the second pedal button is arranged at the bottom of the host shell through the second reset spring.

[0011] Furthermore, the host is provided with a charging port and a signal output interface;

[0012] The tail end of the driver is connected to the signal output interface through a cable.

[0013] Further, the driver includes a drive housing, a motor and a coupling sleeve;

[0014] The motor is arranged in the driving housing, the input end of the motor is connected to the cable, the output shaft of the motor is connected to the coupling sleeve, and the coupling sleeve is arranged at the head end of the driving housing.

[0015] Further, the drill bit body includes a drill bit housing, a transmission shaft and a grinding tool clamping end;

[0016] The grinding drill bit housing is fixedly connected to the driving housing by pins; after the coupling sleeve is inserted into the tail of the grinding drill bit housing, it is connected to one end of the transmission shaft, and the other end of the transmission shaft is connected to the grinding tool clamping end.

[0017] Furthermore, the tail of the transmission shaft is a coupling sleeve, the coupling sleeve is inserted into the coupling sleeve, and an O-type sealing ring is arranged on the outer periphery of the coupling sleeve.

[0018] Compared with the prior art, the advantages of the present invention are:

[0019] 1. The small grinding drill bit with variable speed and direction of rotation of the present invention can realize dual adjustment of speed and direction of rotation through the Hall sensor, effectively assisting the implementation of high-precision and high-complexity surgery.

[0020] 2. The small drill bit of the present invention adopts a three-section design structure, including a drill bit body, a main unit and a driver, and any part can be quickly replaced, which is convenient for later maintenance and upgrading. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the connection structure of the product in the embodiment of the present invention;

[0022] Figure 2 Schematic diagram of the internal structure of the host in an embodiment of the present invention;

[0023] Figure 3 Schematic diagram of the internal structure of the driver in an embodiment of the present invention;

[0024] Figure 4 Schematic diagram of the internal structure of the drill bit body in an embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be further described below.

[0026] like Figure 1 As shown, the present invention provides a small drill bit with variable rotation speed and direction, comprising a drill bit body 1 , a host 2 and a driver 3 ; the drill bit body 1 is connected to the host 2 via the driver 3 .

[0027] Specifically, the host 2 is provided with a motor forward and reverse Hall control component 21 and a motor speed Hall control component 22; the host 2 is provided with a chip for controlling the motor, and the driver 3 adopts a three-phase brushless motor. According to the brushless motor drive requirements, the circuit selects STM8S105K6T6CTR as the control chip, Allegro A4960KJPTR-T as the brushless inductorless motor drive chip, the communication mode is SPI, and the drive mode is PWM. The ADC is used to sample the Hall sensor input. The brushless motor is driven by three-phase electricity. When the motor is commutated, the current will generate a large inductance voltage on the three-phase line. By connecting the inductance in series on each phase, the sudden change during current commutation can be suppressed, the inductance voltage can be reduced, and the heat generation can be reduced. Thus, the motor and the driver 3 are protected. The inductance in the brushless motor can change the normal component and the axial component of the armature reaction inductance, thereby affecting the balance of the magnetic flux. By adjusting the inductance value, the balance of the magnetic flux can be controlled, thereby changing the operating performance of the brushless motor.

[0028] Specifically, Figure 2 As shown, the motor forward and reverse Hall control component 21 is used to control the forward and reverse rotation of the motor, and is mainly composed of a first foot button, a first reset spring, a first magnet and a first Hall sensor. The bottom of the first foot button is connected to the first magnet, the first Hall sensor is connected to the motor driver chip in the host 2, and the first Hall sensor and the first magnet are arranged relative to each other; the first foot button is arranged on the surface of the main body 2 shell through the first reset spring; during the operation, the medical staff controls the output of the first Hall sensor by stepping on the first foot button and utilizing the magnetism on the first magnet, thereby forming a Hall switch to adjust the steering output of the motor driver chip to the motor.

[0029] The motor speed Hall control component 22 includes a second foot pedal, a second return spring, a second magnet and a second Hall sensor; the bottom of the second foot pedal is connected to the second magnet, the second Hall sensor is connected to the motor drive chip in the host 2, and the second Hall sensor and the second magnet are arranged relative to each other; the second foot pedal is arranged at the bottom of the housing of the host 2 through the second return spring. The medical staff controls the output of the second Hall sensor by stepping on the second foot pedal and using the magnetism on the second magnet, and the output is finally fed back to the driver 3 parameters, and the driver 3 controls the motor speed.

[0030] At the same time, if Figure 1 As shown, the host 2 is provided with a charging port and a signal output interface, the charging port is connected to a power supply device, and the signal output interface is connected to a driver 3.

[0031] like Figure 3As shown, the driver 3 is composed of a drive housing 31, a motor 32 and a coupling sleeve 33; the motor 32 is a three-phase brushless motor, which is arranged in the drive housing 31, the input end of the motor 32 is connected to one end of the cable, and the other end of the cable 34 is inserted into the signal output interface of the motor, and the output shaft of the motor 32 is connected to the coupling sleeve 33, and the coupling sleeve 33 is arranged at the head end of the drive housing 31.

[0032] like Figure 4 As shown, the drill bit body 1 includes a drill bit housing 11, a transmission shaft 12 and a tool clamping end 13; the drill bit housing 11 is fixed to the driving housing 31 by a pin; the tail of the transmission shaft 12 is a coupling sleeve 14, and after the coupling sleeve 33 is inserted into the coupling sleeve 14, it is connected to one end of the transmission shaft 12, and the other end of the transmission shaft 12 is connected to the tool clamping end 13. In order to further ensure the connection effect between the coupling sleeve 14 and the coupling sleeve 33, an O-ring is provided on the outer periphery of the coupling sleeve 33.

[0033] In this embodiment, the operating principle of the drill bit is as follows: during the operation, the surgeon steps on the first pedal button to output a Hall signal to the driver chip, and the driver chip drives the motor to realize forward or reverse rotation, and the motor drives the tool in the drill bit body 1 to realize forward or reverse rotation synchronously. By adjusting the strength of stepping on the second pedal button, the Hall signal is output to the driver chip, and the driver chip drives the motor to realize the speed adjustment, and the motor drives the tool in the drill bit body 1 to realize the speed adjustment synchronously.

[0034] The above is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any technician in the relevant technical field, without departing from the scope of the technical solution of the present invention, makes any form of equivalent replacement or modification to the technical solution and technical content disclosed in the present invention, which does not depart from the content of the technical solution of the present invention and still falls within the protection scope of the present invention.

Claims

1. A small grinding drill bit with variable speed and direction, characterized in that: It includes a drill bit body, a host and a driver; The host is provided with a motor forward and reverse Hall control component and a motor speed Hall control component; the signal input end of the driver is connected to the motor forward and reverse Hall control component and the motor speed Hall control component, and the output end of the driver is connected to the drill bit body.

2. The small grinding drill bit with variable speed and direction according to claim 1, characterized in that: The motor forward and reverse Hall control assembly comprises a first foot pedal button, a first return spring, a first magnet and a first Hall sensor; The bottom of the first foot pedal is connected to the first magnet, the first Hall sensor is connected to the motor driving chip in the host, and the first Hall sensor and the first magnet are arranged relative to each other; the first foot pedal is arranged on the surface of the host housing through the first return spring.

3. The small grinding drill bit with variable speed and steering according to claim 1, characterized in that: The motor speed Hall control assembly includes a second foot pedal button, a second return spring, a second magnet and a second Hall sensor; The bottom of the second foot pedal is connected to the second magnet, the second Hall sensor is connected to the motor drive chip in the host, and the second Hall sensor is arranged opposite to the second magnet; the second foot pedal is arranged at the bottom of the host housing through the second return spring.

4. The small grinding drill bit with variable speed and direction according to claim 1, characterized in that: The host is provided with a charging port and a signal output interface; The rear end of the driver is connected to the signal output interface via a cable.

5. The small grinding drill bit with variable speed and steering according to claim 4, characterized in that: The driver comprises a driving housing, a motor and a coupling sleeve; The motor is arranged in the driving housing, the input end of the motor is connected to the cable, the output shaft of the motor is connected to the coupling sleeve, and the coupling sleeve is arranged at the head end of the driving housing.

6. The small grinding drill bit with variable speed and direction according to claim 5, characterized in that: The drill bit body comprises a drill bit housing, a transmission shaft and a grinding tool clamping end; The drill bit housing is fixedly docked with the drive housing by pins; after the coupling sleeve is inserted into the tail of the drill bit housing, it is connected to one end of the transmission shaft, and the other end of the transmission shaft is connected to the grinding tool clamping end.

7. The small grinding drill bit with variable speed and direction according to claim 6, characterized in that: The tail of the transmission shaft is a coupling sleeve, the coupling sleeve is inserted into the coupling sleeve, and an O-type sealing ring is arranged on the outer periphery of the coupling sleeve.

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