Low-noise electric hammer apparatus

Abstract

A low-noise electric hammer apparatus, comprising a housing, an impact drill bit, an impacted main shaft, a hammer head of an electromagnetic hammer, driving iron cores of the electromagnetic hammer, driving coils, an electromagnetic driving controller, impact force reversing levers, a lever supporting seat, lever supporting seat bearings, and bearings. The apparatus uses two groups of driving iron cores to alternatively generate magnetic force to drive the hammer head to move back and forth; rebound force is obtained during hammering so as to form ping-pong type hammering; and a noise shielding apparatus is provided at a hammering position of the hammer head, thereby realizing low-noise work.

Description

A low-noise electric hammer device Technical Field

[0001] This device belongs to: Mechanical Engineering Background Art

[0002] Most of the current electric hammers rely on an eccentric connecting rod to drive the piston to compress the air so that the impact hammer head in the piston obtains kinetic energy, and then impacts the drill bit to drill holes and break rocks or concrete. In this way, the noise generated by the process of compressing and releasing the air, plus the sound of the drill bit impacting the rock and concrete, brings uncomfortable noise to the operator and people nearby. After testing, when the hammer hits the chisel, the point where the sound is emitted is the contact point between the hammer and the chisel, and the chisel and the object being hammered. In this way, low-noise operation can be achieved by eliminating the noise of compressed air pressure release and absorbing the noise of the hammering contact point. Summary of the Invention

[0003] In order to solve the problem of uncomfortable noise emitted by electric hammers during operation, an electromagnetic drive solution was invented to replace the piston solution of traditional electric hammers to achieve low noise.

[0004] A low-noise electric hammer device comprises a housing, an impact drill bit, a drill bit and a struck shaft connector, a struck main shaft, a hammer head, a driving iron core, a driving coil, an electromagnetic driving controller, an impact force reverse lever, a lever support seat, a lever support seat bearing, a noise shielding chamber, a bearing, and a struck shaft rotation driving gear; wherein the struck main shaft, the hammer head, the driving iron core, the driving coil, the impact force reverse lever, the lever support seat, the lever support seat bearing, the noise shielding chamber, the bearing, and the struck shaft rotation driving gear are all located in the housing; the impact drill bit is connected to the struck main shaft through the drill bit and the struck shaft connector, and the struck main shaft is sleeved with a struck shaft rotation driving gear; steps are provided at both ends of the struck main shaft, and the hammer head sleeve is arranged on the struck main shaft On the main shaft and between the steps at both ends; the impact force reverse lever is arranged on the lever support seat bearing through the lever support seat, which is used to provide rebound force to the struck main shaft; the driving coil is wound on the driving iron core, and the two sets of relative driving coils are alternately energized to make the hammer head hammer back and forth, forming a ping-pong type hammering together with the rebound force of the impact force reverse lever, and the reverse hammering is reversed by a lever to achieve unidirectional hammering, and the noise is shielded at the hammering point to achieve low-noise operation, which is characterized in that: a certain gap is maintained between one magnetic pole end face of the driving iron core and the side face of the sliding hammer head to provide a low magnetic resistance circuit, and the other magnetic pole is placed in front of the sliding hammer head to form an opposite magnetic pole with the front of the hammer head, which attracts the hammer head to do work.

[0005] The advantages are: high frequency and low power consumption, because the efficiency of converting electric energy into electromagnetic force is higher than that of compressed air, and secondly, long life. The hammer head is driven by magnetic force, does not require eccentric gears, has little wear and tear, long life, small size, and low noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] [Corrected 23.10.2023 according to Rule 91] Figure 1 shows a schematic diagram of the structure, in which 2 is an impact drill bit, 3 a connector between the drill bit and the struck shaft, 4 a rotary drive motor for the impact head, 5 a rotary drive gear for the struck shaft, 6 a bearing, 7 a housing, 8 a struck shaft, 9 and 16 noise shielding housings, 10 a hammering part of the hammer head, 11 and 15 a driving iron core of the electric hammer head, 12 a magnetic conductive core part of the hammer head, 13 and 14 are driving coils of the hammer head, 17 an impact force reverse lever, 18 a lever support seat, and 19 a bearing of the lever support seat. Implementation Method

[0007] [Corrected on 23.10.2023 according to Rule 91] As shown in Figure 1, there should be an electronic drive part, which is usually composed of a drive controller consisting of a single-chip microcomputer and an IGBT or MOS tube. The drive controller is not the main content of this application, so the details will not be described. It is only explained how to achieve low-noise operation. It is divided into three parts. First, the silencer part: Figure numbers 9 and 16 mainly shield the sound and represent the sound-absorbing cavity. This Figure 1 is convenient to understand with component representation, which can also be omitted. It consists of an outer shell. This scheme has a high-frequency hammering working mode, and the hammering energy can be done in small amounts and multiple times. It can also reduce the noise during hammering and achieve a low-noise working condition; Second, the hammering part: First of all, in terms of mechanics, there is a force at both ends of the device to maintain balance during normal operation, providing a basis for the hammer head to work in a ping-pong manner. When one of the electromagnet cores 11 applies magnetic force, the hammer head hammers the struck shaft. The electromagnetic core 11 also applies magnetic force to the hammer again, thus realizing ping-pong-style hammering. During this process, the 10 and 12 components of the hammer obtain kinetic energy by generating electromagnetic force with the 11 and 15 iron cores. At the same time, the motor 4 drives the gear 5 to rotate the struck shaft to realize hammering rotation. Third, the electromagnetic force driving part: the two opposite surfaces of the magnetic conductive core 12 of the hammer are respectively opposite to the pole claws of each magnetic pole of the moving iron cores 11 and 15, forming magnetic poles with opposite polarity. The electromagnetic force generated alternately is much greater than the resistance when the pole claws of each other magnetic pole of the driving iron cores 11 and 15 slide with the magnetic conductive core 12 of the hammer that maintains equidistant or constant magnetic resistance, thereby realizing electromagnetic force driving the hammer.

[0008] [Corrected on 23.10.2023 according to Rule 91] The above description and Figure 1 are only illustrative of the working method of reversing the reverse impact force. Figure 1 is only one scheme within the scope of this patent right. Any changes within the scope covered by the characteristic part in the claims shall not deviate from the scope of this patent. The scope of protection of this patent includes but is not limited to electric hammers, electric picks, and hammering equipment.

Claims

1. A low-noise electric hammer device comprises a housing, an impact drill bit, a drill bit and a striking shaft connector, a striking spindle, a hammer head, a driving iron core, a driving coil, an electromagnetic drive controller, an impact force reverse lever, a lever support seat, a lever support seat bearing, a noise shielding chamber, a bearing, and a striking shaft rotation drive gear; wherein, The striking spindle, hammer, driving iron core, driving coil, impact force reverse lever, lever support seat, lever support seat bearing, noise shielding chamber, bearing, striking shaft rotation driving gear are all located in the housing; the impact drill is connected to the striking spindle through the drill and striking shaft connector, and the striking spindle is sleeved with a striking shaft rotation driving gear; two steps are provided at both ends of the striking spindle, and the hammer is sleeved on the striking spindle and located between the steps at both ends; the impact force reverse lever is arranged on the lever support seat bearing through the lever support seat, and is used to provide the striking spindle with Rebound force; the driving coil is wound on the driving iron core, and two sets of relative driving coils are energized alternately to make the hammer head hammer back and forth, forming a ping-pong type hammering together with the rebound force of the impact force guide lever. The reverse hammering is reversed by a lever to achieve one-way hammering, and the noise is shielded at the hammering point to achieve low-noise operation. It is characterized in that: a certain gap is maintained between one magnetic pole end face of the driving iron core and the side face of the sliding hammer head to provide a low magnetic resistance circuit, and the other magnetic pole is placed in front of the sliding hammer head to form an opposite magnetic pole with the front part of the hammer head, which attracts the hammer head to do work.

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