Small grinding drill bit with variable rotating speed and rotating direction

Abstract

The utility model provides a small-sized grinding drill bit with variable rotating speed and rotating direction. The small-sized 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 high-precision and high-complexity operations can be effectively assisted to be achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical equipment technical field especially, it relates to a variable speed and steering small -size drill bit. BACKGROUND

[0002] The surgical drill is widely used in neurosurgery, spine surgery, microsurgery etc., usually utilizes the rotation of the cutter head to grind the bone tissue.

[0003] The existing drill can only realize one -way rotation cutting generally, the rotation speed also cannot be adjusted in real time, in the face of the diverse and complex operation process, the functional simplicity of existing drill, the convenience is low. UTILITY MODEL CONTENT

[0004] The utility model discloses a kind of small -size drill bits that can realize rotation speed and steering dual switching.

[0005] To achieve the above object, the utility model provides a variable speed and steering small -size drill bit, including drill bit body, host computer and driver;

[0006] Motor forward and reverse rotation hall control assembly and motor speed hall control assembly are equipped in host computer;The signal input end of driver is connected with motor forward and reverse rotation hall control assembly and motor speed hall control assembly, and the output end of driver is connected with drill bit body.

[0007] Further, motor forward and reverse rotation hall control assembly includes first foot pedal button, first reset spring, first magnet and first hall sensor;

[0008] The bottom of first foot pedal button is connected with first magnet, and first hall sensor is connected with motor drive chip in host computer, and first hall sensor and first magnet are oppositely arranged;First foot pedal button is arranged on the surface of host computer shell by first reset spring;

[0009] Motor speed hall control assembly includes second foot pedal button, second reset spring, second magnet and second hall sensor;

[0010] The bottom of second foot pedal button is connected with second magnet, and second hall sensor is connected with motor drive chip in host computer, and second hall sensor and second magnet are oppositely arranged;Second foot pedal button is arranged at the bottom position of host computer shell by second reset spring.

[0011] Further, host computer is equipped with charging hole and signal output interface;

[0012] The tail end of driver is connected with signal output interface by cable.

[0013] Further, driver includes drive shell, motor and coupling sleeve.

[0014] The motor is located inside the drive housing. The input end of the motor is connected to a cable, and the output shaft of the motor is connected to a coupling sleeve, which is located at the beginning of the drive housing.

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

[0016] The drill bit housing is fixed to the drive housing by a pin; after the coupling sleeve is inserted into the tail of the drill bit housing, it is connected to one end of the drive shaft, and the other end of the drive shaft is connected to the grinding tool clamping end.

[0017] Furthermore, the tail end of the drive shaft is a coupling sleeve, into which the coupling sleeve is inserted, and an O-ring is provided on the outer circumference of the coupling sleeve.

[0018] Compared with the prior art, the advantages of this utility model are:

[0019] 1. The variable speed and direction small grinding drill bit of this utility model can realize dual adjustment of speed and direction through Hall sensor, which can effectively assist in the realization of high-precision and high-complexity surgery.

[0020] 2. The small grinding drill bit of this utility model adopts a three-section design structure, including the grinding drill bit body, the main unit and the driver. Any part can be quickly replaced, which is convenient for later maintenance and upgrades. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the connection structure of the product in an embodiment of this utility model;

[0022] Figure 2 This is a schematic diagram of the internal structure of the host in an embodiment of this utility model;

[0023] Figure 3 This is a schematic diagram of the internal structure of the driver in an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the internal structure of the grinding drill bit body in an embodiment of this utility model. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be further described below.

[0026] like Figure 1 As shown, this utility model proposes a small grinding drill bit with variable speed and direction, including a grinding drill bit body 1, a main unit 2, and a driver 3; the grinding drill bit body 1 is connected to the main unit 2 through the driver 3.

[0027] Specifically, the host 2 is provided with a motor forward and reverse rotation Hall control assembly 21 and a motor rotating speed Hall control assembly 22; the host 2 is provided with a chip for controlling the motor, the driver 3 adopts a three-phase brushless motor, according to the brushless motor driving requirements, the circuit selects STM8S105K6T6CTR as the control chip, Allegro A4960KJPTR-T as the brushless non-inductive motor driving chip, the communication mode is SPI, and the driving mode is PWM. The Hall sensor input is sampled by using the ADC. The brushless motor is driven by three-phase electricity, when the motor commutates, the current will generate a large inductive voltage on the three-phase line, by connecting an inductor in series on each phase, the sudden change of the current during commutation can be inhibited, the inductive voltage is reduced, and the heat generation is 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, as shown in Figure 2 The motor forward and reverse rotation Hall control assembly 21 is used for controlling the forward and reverse rotation of the motor, mainly composed of a first foot pedal button, a first reset spring, a first magnet and a first Hall sensor, the bottom of the first foot pedal button is connected with the first magnet, the first Hall sensor is connected with the motor driving chip in the host 2, and the first Hall sensor and the first magnet are oppositely arranged; the first foot pedal button is arranged on the surface of the host 2 shell through the first reset spring; during the operation, the medical staff steps on the first foot pedal button, controls the output of the first Hall sensor by using the magnetism on the first magnet, forms a Hall switch to adjust the steering output of the motor driving chip to the motor.

[0029] The motor rotating speed Hall control assembly 22 includes a second foot pedal button, a second reset spring, a second magnet and a second Hall sensor; the bottom of the second foot pedal button is connected with the second magnet, the second Hall sensor is connected with the motor driving chip in the host 2, and the second Hall sensor and the second magnet are oppositely arranged; the second foot pedal button is arranged at the bottom position of the host 2 shell through the second reset spring. The medical staff steps on the second foot pedal button, controls the output of the second Hall sensor by using the magnetism on the second magnet, and finally feeds back the output to the driver 3 parameter, which is controlled by the driver 3 to control the motor rotating speed.

[0030] Meanwhile, as shown in Figure 1 The host 2 is provided with a charging hole and a signal output interface, the charging hole is connected with a power supply device, and the signal output interface is connected with the driver 3.

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

[0032] As shown in the figure, Figure 4 As shown in the figure, the drill bit body 1 comprises a drill bit housing 11, a transmission shaft 12 and a tool clamping end head 13; the drill bit housing 11 is fixedly connected with the driving housing 31 through a pin; a tail of the transmission shaft 12 is a coupling sleeve 14, the coupling sleeve 33 is inserted into the coupling sleeve 14 and is in driving connection with one end of the transmission shaft 12, and the other end of the transmission shaft 12 is connected with the tool clamping end head 13. In order to further ensure the connection effect between the coupling sleeve 14 and the coupling sleeve 33, a 0-type sealing ring is arranged on the outer periphery of the coupling sleeve 33.

[0033] In the embodiment, the operation principle of the drill bit is as follows: during the operation, a surgeon steps on a first foot pedal button to output a Hall signal to a driving chip, the driving chip drives the motor to realize forward rotation or reverse rotation, and the motor drives cutters in the drill bit body 1 to realize forward rotation or reverse rotation simultaneously. The intensity of stepping on a second foot pedal button is adjusted to output a Hall signal to the driving chip, the driving chip drives the motor to realize speed adjustment, and the motor drives the cutters in the drill bit body 1 to realize speed adjustment simultaneously.

[0034] The above is only the preferred embodiment of the present application, and does not limit the present application in any way. Any person skilled in the art, without departing from the technical solution of the present application, can make any form of equivalent replacement or modification of the technical solution and technical content disclosed in the present application, and such change still belongs to the protection scope of the present application.

Claims

1. A variable speed and direction small size grinding drill bit, characterized by, The grinding drill head body, the main machine and the driver are included; The main machine is internally provided with a motor forward and reverse rotation Hall control assembly and a motor rotating speed Hall control assembly; a 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 an output end of the driver is connected with the grinding drill head body.

2. The variable speed and direction, small-scale, abrasive burr of claim 1, wherein, The motor forward and reverse rotation Hall control assembly includes a first foot pedal button, a first reset spring, a first magnet and a first Hall sensor; The bottom of the first foot pedal button is connected with the first magnet, the first Hall sensor is connected with a motor driving chip in the main machine, and the first Hall sensor is oppositely arranged with the first magnet; the first foot pedal button is arranged on the surface of the main machine shell through the first reset spring.

3. The variable speed and direction, small-scale, abrasive burr of claim 1, wherein, The motor rotating speed Hall control assembly includes a second foot pedal button, a second reset spring, a second magnet and a second Hall sensor; The bottom of the second foot pedal button is connected with the second magnet, the second Hall sensor is connected with the motor driving chip in the main machine, and the second Hall sensor is oppositely arranged with the second magnet; the second foot pedal button is arranged at the bottom position of the main machine shell through the second reset spring.

4. The variable speed and direction, small-scale, abrasive burr of claim 1, wherein, The main machine is provided with a charging hole and a signal output interface; The tail end of the driver is connected with the signal output interface through a cable.

5. The variable speed and direction, small-scale, abrasive drill bit of claim 4, wherein, The driver includes a driving shell, a motor and a coupling sleeve; The motor is arranged in the driving shell, an input end of the motor is connected with the cable, an output shaft of the motor is connected with the coupling sleeve, and the coupling sleeve is arranged at the head end of the driving shell.

6. The variable speed and direction, small-scale, abrasive burr of claim 5, wherein, The grinding drill head body includes a grinding drill head shell, a transmission shaft and a grinding tool clamping end head; The grinding drill head shell is fixedly connected with the driving shell through a pin, the coupling sleeve is inserted into the tail end of the grinding drill head shell and is in transmission connection with one end of the transmission shaft, and the other end of the transmission shaft is connected with the grinding tool clamping end head.

7. The variable speed and direction, small-scale, abrasive burr of claim 6, wherein, The tail end of the transmission shaft is a coupling sleeve, the coupling sleeve is inserted into the coupling sleeve, and a 0-type sealing ring is arranged on the outer periphery of the coupling sleeve.

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