Electric pick with double protection mechanisms

Abstract

The utility model discloses an electric pick with a dual protection mechanism, which comprises a shell, a motor and a rotary impact component are arranged in the shell, one end of the rotary impact component is fixedly connected with a clamp, a drill bit is mounted on the clamp, a first gear is fixedly connected onto a rotating shaft of the motor, and a first transmission shaft is rotatably mounted in the shell. The upper end of the first transmission shaft is fixedly connected with a second gear, the edge of the second gear is hinged to a piston in the rotary impact assembly through a crankshaft connecting rod, the lower end of the first transmission shaft is fixedly connected with a third gear, and the third gear is in transmission connection with a transmission gear on an air cylinder in the rotary impact assembly through a clutch assembly. When the drill bit is locked, torsion is transmitted to the second transmission shaft through the transmission gear, and when the torsion value is larger than the elastic force of the spring, the clamping ball is forced to rotate to be separated from the coupling groove and pressed into the groove, so that the fourth gear cannot drive the disc to rotate, the machine reaches a no-load state, and the safety of a user is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of electric pickaxes, in particular to an electric pickaxe with a double protection mechanism. Background Art

[0002] The electric pick is a widely used electric tool. The electric pick is based on the electric drill, with an additional piston with a crankshaft connecting rod driven by an electric motor. The air is compressed back and forth in a cylinder, causing the air pressure in the cylinder to change periodically. The changing air pressure drives the hammer in the cylinder to reciprocate and strike the top of the drill bit, which is equivalent to hitting the drill bit with a hammer, hence the name electric pick.

[0003] If an existing electric pick suddenly gets stuck during use, such as when drilling a hole in concrete and suddenly hitting a steel bar, the huge reaction force will force the outer shell of the electric pick to reverse, which can easily cause harm to the user.

[0004] For this reason, an electric pick with a double protection mechanism is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide an electric pick with a double protection mechanism, so as to solve or at least alleviate one or more of the above-mentioned problems and other problems existing in the prior art.

[0006] In order to achieve the above-mentioned purpose, the main technical solutions adopted by the utility model include:

[0007] An electric pick with a double protection mechanism comprises a shell and a drill bit, wherein a motor and a rotary impact assembly are arranged inside the shell, one end of the rotary impact assembly is fixedly connected to a clamp, and the drill bit is detachably mounted on the clamp, a first gear is fixedly connected to the rotating shaft of the motor, a first transmission shaft is rotatably mounted inside the shell, a second gear is fixedly connected to the upper end of the first transmission shaft, an edge of the second gear is hinged to a piston in the rotary impact assembly via a crankshaft connecting rod, a third gear is fixedly connected to the lower end of the first transmission shaft, and the third gear is transmission-connected to the transmission gear on the cylinder in the rotary impact assembly via a clutch assembly.

[0008] In an electric pick with a double protection mechanism according to the utility model, the clutch assembly includes a second transmission shaft and a fourth gear, a bevel gear is fixedly connected to the top of the second transmission shaft, the bevel gear is meshed with the transmission gear, a disc is fixedly connected to the second transmission shaft, a plurality of grooves are provided on the top of the disc, springs and beads are arranged inside the grooves, the beads are arranged at the end of the groove away from the center of the disc, an assembly groove is provided at the bottom of the fourth gear, the fourth gear is covered on the disc through the assembly groove, a coupling groove corresponding to the bead is provided at the bottom of the fourth gear, and the bead can be pressed against the coupling groove under the elastic force of the spring.

[0009] In an electric pick with a double protection mechanism according to the utility model, a plurality of grooves are arranged at equal angles along the circumference of the disc.

[0010] In an electric pick with a double protection mechanism according to the utility model, the grooves are arranged in no less than four groups.

[0011] In an electric pick with a double protection mechanism according to the utility model, the coupling groove is arranged in an arc shape, and a protrusion is left between two adjacent coupling grooves.

[0012] In an electric pick with a double protection mechanism according to the utility model, a speed sensor for detecting the speed of the motor shaft is also installed inside the shell, a DSP controller is fixedly installed inside the shell, the speed sensor is electrically connected to the input end of the DSP controller, and the motor is controlled by the DSP controller.

[0013] The utility model has at least the following beneficial effects:

[0014] The utility model provides a clutch assembly. When the drill bit is blocked, the torque is transmitted to the second transmission shaft through the transmission gear and the bevel gear. When the torque value at this time is greater than the elastic force of the spring, the card bead is forced to rotate out of the coupling groove and press into the groove, so that the fourth gear cannot drive the disc to rotate, thereby making the machine reach an unloaded state, thereby ensuring the safety of the user.

[0015] By setting up a speed sensor in conjunction with the DSP controller, when the speed sensor detects that the speed of the motor fluctuates, the DSP controller will control the motor to stop working, thereby preventing the user from being injured by sudden reaction force. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of part A;

[0019] Figure 3 It is a schematic diagram of the exploded structure of the clutch assembly of the utility model;

[0020] Figure 4 It is a schematic cross-sectional structure diagram of the clutch assembly of the utility model.

[0021] Description of Figure Numbers:

[0022] 1. Housing; 2. Drill bit; 3. Motor; 4. First gear; 5. Second gear; 6. Third gear; 7. Second transmission shaft; 8. Fourth gear; 801. Assembly groove; 802. Coupling groove; 9. Bevel gear; 10. Transmission gear; 11. First transmission shaft; 12. Disc; 13. Card bead; 14. Spring; 15. Groove; 16. Speed ​​sensor; 17. Crankshaft connecting rod; 18. Rotary impact assembly; 19. Clamp. DETAILED DESCRIPTION

[0023] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0024] Please refer to Figures 1 to 4 As shown, in the embodiment of the utility model,

[0025] An electric pick with a double protection mechanism comprises a shell 1, wherein a motor 3 and a rotary impact assembly 18 are arranged inside the shell 1, one end of the rotary impact assembly 18 is fixedly connected to a clamp 19, a drill bit 2 can be detachably mounted on the clamp 19, the structure and working principle of the rotary impact assembly 18 and the clamp 19 are prior arts in the art, and are not elaborated herein, a first gear 4 is fixedly connected to the rotating shaft of the motor 3, a first transmission shaft 11 is rotatably mounted inside the shell 1, a second gear 5 is fixedly connected to the upper end of the first transmission shaft 11, an edge of the second gear 5 is hinged to a piston in the rotary impact assembly 18 through a crankshaft connecting rod 17, a third gear 6 is fixedly connected to the lower end of the first transmission shaft 11, and the third gear 6 is transmission-connected to a transmission gear 10 on a cylinder in the rotary impact assembly 18 through a clutch assembly, in this embodiment, the clutch assembly comprises a second transmission shaft 7 and a fourth gear 8, A bevel gear 9 is fixedly connected to the top of the second transmission shaft 7, and the bevel gear 9 is meshed with the transmission gear 10. A disc 12 is fixedly connected to the second transmission shaft 7. A plurality of grooves 15 are provided on the top of the disc 12. The plurality of grooves 15 are arranged at equal angles along the circumference of the disc 12. In order to ensure that the fourth gear 8 has sufficient connection strength with the disc 12, no less than four groups of grooves 15 are provided. A spring 14 and a card bead 13 are provided inside the groove 15. The card bead 13 is arranged at the end of the groove 15 away from the center of the disc 12. An assembly groove 801 is provided at the bottom of the fourth gear 8. The fourth gear 8 is covered on the disc 12 through the assembly groove 801. A coupling groove 802 corresponding to the card bead 13 is provided at the bottom of the fourth gear 8. The card bead 13 can be pressed against the coupling groove 802 under the elastic force of the spring 14. The coupling groove 802 is arranged in an arc shape, and a protrusion is left between two adjacent coupling grooves 802.

[0026] By adopting the above technical solution, when the drill bit 2 is blocked, the torque is transmitted to the second transmission shaft 7 through the transmission gear 10 and the bevel gear 9. When the torque value at this time is greater than the elastic force of the spring 14, the card bead 13 is forced to rotate out of the coupling groove 802 and press into the groove 15, so that the fourth gear 8 cannot drive the disc 12 to rotate, and then the machine reaches a no-load state, ensuring the safety of the user and forming the first level of protection.

[0027] In this embodiment, a speed sensor 16 for detecting the rotation speed of the shaft of the motor 3 is also installed inside the shell 1. A DSP controller is fixedly installed inside the shell 1. The speed sensor 16 is electrically connected to the input end of the DSP controller. The motor 3 is controlled by the DSP controller. The speed sensor 16 is set to cooperate with the DSP controller. When the speed sensor 16 detects that the speed of the motor 3 fluctuates, the DSP controller controls the motor 3 to stop working, thereby preventing the user from being injured by sudden reaction force, thereby forming a second level of protection.

[0028] It is worth noting that the DSP controller can be a TMS320F2812 DSP controller of model number, and the speed sensor 16 can be a Siemens SIEMENS motor speed sensor of model number AGG5.315.

[0029] The above description shows and describes several preferred embodiments of the utility model, but as mentioned above, it should be understood that the utility model is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the utility model concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not deviate from the spirit and scope of the utility model, and should be within the scope of protection of the claims attached to the utility model.

Claims

1. An electric pick with a double protection mechanism, comprising a shell (1) and a drill bit (2), wherein a motor (3) and a rotary impact assembly (18) are arranged inside the shell (1), one end of the rotary impact assembly (18) is fixedly connected to a fixture (19), the drill bit (2) can be detachably mounted on the fixture (19), a first gear (4) is fixedly connected to the rotating shaft of the motor (3), a first transmission shaft (11) is rotatably mounted inside the shell (1), a second gear (5) is fixedly connected to the upper end of the first transmission shaft (11), an edge of the second gear (5) is hinged to a piston in the rotary impact assembly (18) through a crankshaft connecting rod (17), a third gear (6) is fixedly connected to the lower end of the first transmission shaft (11), and the invention is characterized in that: The third gear (6) is in transmission connection with the transmission gear (10) on the cylinder in the rotary impact assembly (18) via a clutch assembly.

2. The electric pick with double protection mechanism according to claim 1, characterized in that: The clutch assembly comprises a second transmission shaft (7) and a fourth gear (8); a bevel gear (9) is fixedly connected to the top of the second transmission shaft (7), and the bevel gear (9) is meshed with the transmission gear (10); a disc (12) is fixedly connected to the second transmission shaft (7); a plurality of grooves (15) are provided on the top of the disc (12); a spring (14) and a card bead (13) are arranged inside the groove (15); the card bead (13) is arranged at one end of the groove (15) away from the center of the disc (12); a mounting groove (801) is provided at the bottom of the fourth gear (8); the fourth gear (8) is covered on the disc (12) through the mounting groove (801); a coupling groove (802) corresponding to the card bead (13) is provided at the bottom of the fourth gear (8); the card bead (13) can be pressed against the coupling groove (802) under the elastic force of the spring (14).

3. The electric pick with double protection mechanism according to claim 2, characterized in that: A plurality of grooves (15) are arranged at equal angles along the circumference of the disc (12).

4. The electric pick with double protection mechanism according to claim 3, characterized in that: The grooves (15) are arranged in no less than four groups.

5. The electric pick with double protection mechanism according to claim 2, characterized in that: The coupling grooves (802) are arranged in an arc shape, and a protrusion is left between two adjacent coupling grooves (802).

6. An electric pick with a double protection mechanism according to any one of claims 1 to 5, characterized in that: A speed sensor (16) for detecting the speed of the shaft of the motor (3) is also installed inside the housing (1), and a DSP controller is fixedly installed inside the housing (1). The speed sensor (16) is electrically connected to the input end of the DSP controller, and the motor (3) is controlled by the DSP controller.

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