High voltage prevention device for electric hammer

Abstract

The utility model relates to the technical field of electric hammers, in particular to an electric hammer high pressure prevention device which comprises a piston system, the piston system is covered with a front cover, and the piston system communicates with a gearbox used for driving the piston system to operate; the gearbox comprises a shell connected with the front cover and a gear set arranged in the shell, a pressure relief hole is formed in the shell, and waterproof wool felt is arranged in the pressure relief hole. The piston system has the effects that long-time high temperature and high pressure in the piston system can be prevented, and then the cylinder score condition is reduced.

Description

Technical Field

[0001] This application relates to the technical field of electric hammers, and in particular to a high-voltage protection device for electric hammers. Background Technology

[0002] An electric hammer is a high-efficiency impact power tool powered by electricity, widely used in construction, decoration, mining and other fields. It is mainly used for drilling or breaking up hard materials such as concrete, stone, and brick walls. Its core structure consists of an electric motor, transmission mechanism, cylinder piston system and drill bit. It converts electrical energy into high-frequency impact force through mechanical transmission, and combines it with rotational motion to achieve efficient penetration.

[0003] Compared to traditional electric drills, hammer drills utilize a pneumatic impact principle. During operation, an internal piston reciprocates within a cylinder, generating continuous impact forces. This allows the drill bit to produce thousands of impacts per minute (typically 4000-6000 impacts / minute), with impact energy reaching 2-10 joules. This design significantly improves the efficiency of processing hard materials, operating at a speed 3-5 times faster than ordinary electric drills, while effectively reducing the operator's physical exertion.

[0004] Regarding the aforementioned technologies, the inventors discovered that during a single long-term operation, when the piston in the piston system moves back and forth for an extended period of time, compressing the air, the internal air gradually becomes compressed, increasing in pressure and temperature. As the pressure and temperature rise, the piston sleeve is prone to deformation, which can lead to cylinder scoring. Utility Model Content

[0005] To address the aforementioned technical problems, this application provides an anti-high-pressure device for electric hammers, which has the advantage of preventing prolonged high temperature and high pressure within the piston system, thereby reducing the occurrence of cylinder scoring.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A high-voltage protection device for an electric hammer includes a piston system, the piston system being covered by a front cover, and the piston system being connected to a gearbox for driving the piston system.

[0008] The gearbox includes a housing connected to the front cover and a gear set disposed within the housing. The housing is provided with a pressure relief hole, and a waterproof wool felt is disposed inside the pressure relief hole.

[0009] To achieve the above technical solution, the high-temperature and high-pressure gas generated in the piston system can enter between the gearbox and the front cover, and then be discharged through the pressure relief hole. Due to the properties of the wool felt itself, the gas pressure in the gearbox will only be discharged from the capillaries in the wool felt after reaching a certain pressure, thereby achieving the effect of high pressure and automatic pressure relief. At the same time, the wool felt can prevent external dust from entering the gearbox through the pressure relief hole and contaminating the gearbox.

[0010] As a preferred embodiment of this application, the bottom of the housing is rotatably provided with an input shaft, and the pressure relief hole is located on the housing on the side away from the front cover.

[0011] By implementing the above technical solution, the pressure relief hole is located at the end away from the piston system, which can further prevent dust from clogging the wool felt and causing the guide post to fail to relieve pressure.

[0012] As a preferred embodiment of this application, it also includes a protective shell, the piston system is disposed inside the protective shell, a flexible gasket is provided between the pressure relief hole and the protective shell, and a pressure relief groove communicating with the pressure relief hole is provided on the outer wall of the shell.

[0013] The above technical solution ensures that the wool felt is pressed tightly into the pressure relief hole by the flexible gasket, preventing the wool felt from being blown out due to excessive air pressure. The high-pressure gas discharged from the pressure relief hole can also be discharged from the pressure relief groove to prevent the flexible gasket from blocking the wool felt while fixing it. Furthermore, the overall bending channel design of the pressure relief groove and the pressure relief hole can further prevent dust from contaminating the wool felt.

[0014] As a preferred embodiment of this application, it also includes a motor connected to the input shaft, a fan being provided on the output shaft of the motor, and an exhaust port being provided on the protective housing.

[0015] The above technical solution enables the motor to drive the gearbox and piston system to operate while simultaneously driving the fan to rotate, thereby expelling the high-temperature and high-pressure gas discharged from the pressure relief hole through the exhaust hole, thus preventing the temperature of various parts of the electric hammer from becoming too high.

[0016] In summary, this application includes at least one of the following beneficial technical effects:

[0017] 1. The high-temperature and high-pressure gas generated in the piston system can enter between the gearbox and the front cover, and then be discharged through the pressure relief hole. Due to the properties of the wool felt itself, the gas pressure in the gearbox will only be discharged from the capillaries in the wool felt after reaching a certain pressure, thereby achieving the effect of high pressure automatic pressure relief. At the same time, the wool felt can prevent external dust from entering the gearbox through the pressure relief hole and contaminating the gearbox. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1This is a schematic diagram of the overall structure of an embodiment of this application.

[0020] Figure 2 This is a cross-sectional view of an embodiment of this application.

[0021] Figure 3 yes Figure 2 A schematic diagram of the structure of part A.

[0022] Figure 4 This is a schematic diagram of the pressure relief groove in the embodiment of this application.

[0023] Reference numerals: 1. Piston system; 2. Front cover; 3. Gearbox; 31. Gear set; 32. Pressure relief hole; 33. Wool felt; 34. Input shaft; 35. Pressure relief groove; 36. Housing; 4. Protective shell; 41. Exhaust hole; 5. Flexible gasket; 6. Motor; 7. Fan. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0025] This application discloses a high-voltage protection device for electric hammers. (Refer to...) Figure 1 The electric hammer anti-high voltage device includes a piston system 1, a front cover 2 is provided on the outside of the piston system 1, and a gearbox 3 is connected to the piston system 1 for driving the piston system 1 to operate.

[0026] The gearbox 3 includes a housing 36 connected to the front cover 2 and a gear set 31 disposed within the housing 36. The housing 36 has a pressure relief hole 32, and a felt 33 is placed inside the pressure relief hole 32. Therefore, the high-temperature, high-pressure gas generated in the piston system 1 can enter between the gearbox 3 and the front cover 2, and then be discharged through the pressure relief hole 32. Due to the properties of the felt 33, the gas pressure inside the gearbox 3 will only be discharged from the capillaries in the felt 33 after reaching a certain pressure, thus achieving the effect of automatic pressure relief. At the same time, the felt 33 can prevent external dust from entering the gearbox 3 through the pressure relief hole 32 and contaminating the gearbox 3.

[0027] An input shaft 34 is rotatably mounted on the bottom of the housing 36. The pressure relief hole 32 is located on the side of the housing 36 away from the front cover 2, so that the pressure relief hole 32 is located at the end away from the piston system 1, which can further prevent dust from clogging the felt 33 and prevent the guide column from being unable to relieve pressure.

[0028] To prevent the wool felt 33 from being blown out due to excessive air pressure, the electric hammer anti-high pressure device also includes a protective shell 4. The piston system 1 is installed inside the protective shell 4. A flexible gasket 5 is installed between the pressure relief hole 32 and the protective shell 4. A pressure relief groove 35 communicating with the pressure relief hole 32 is provided on the outer wall of the shell 36. This allows the wool felt 33 to be pressed tightly in the pressure relief hole 32 by the flexible gasket 5, and the high-pressure gas discharged from the pressure relief hole 32 can be discharged from the pressure relief groove 35. This prevents the flexible gasket 5 from fixing the wool felt 33 while blocking it. Furthermore, the overall bending channel of the pressure relief groove 35 and the pressure relief hole 32 can further prevent dust from contaminating the wool felt 33.

[0029] To prevent the high-pressure, high-temperature gas discharged from the pressure relief hole 32 from remaining in the housing 36 for too long, which could cause the components inside the housing 36 to gradually heat up and deform, a motor 6 is connected to the input shaft 34. A fan 7 is installed on the output shaft of the motor 6, and an exhaust hole 41 is provided on the protective housing 4. This allows the motor 6 to drive the gearbox 3 and piston system 1 to operate while simultaneously driving the fan 7 to rotate, thereby expelling the high-pressure, high-temperature gas discharged from the pressure relief hole 32 through the exhaust hole 41, thus preventing the temperature of various parts of the electric hammer from becoming too high.

[0030] The implementation principle of the electric hammer anti-high pressure device in this application embodiment is as follows: the high temperature and high pressure gas generated in the piston system 1 can enter between the gearbox 3 and the front cover 2, and then be discharged through the pressure relief hole 32. Due to the properties of the wool felt 33 itself, the gas pressure in the gearbox 3 will only be discharged from the capillary in the wool felt 33 after reaching a certain pressure, thereby achieving the effect of automatic pressure relief. At the same time, the wool felt 33 can prevent external dust from entering the gearbox 3 through the pressure relief hole 32 and contaminating the gearbox 3.

[0031] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An anti-high pressure device for an electric hammer, characterized by: The piston system (1) is externally covered with a front cover (2), and a gearbox (3) for driving the piston system (1) to operate is communicated with the piston system (1); The gearbox (3) comprises a shell (36) connected with the front cover (2) and a gear set (31) arranged in the shell (36), and a pressure relief hole (32) is arranged on the shell (36), and a waterproof wool felt (33) is arranged in the pressure relief hole (32).

2. The high pressure preventing device for electric hammer according to claim 1, wherein: An input shaft (34) is rotatably arranged on the bottom of the shell (36), and the pressure relief hole (32) is arranged on the shell (36) away from the front cover (2).

3. The hammer high pressure prevention device of claim 1, wherein: A protective shell (4) is further arranged, the piston system (1) is arranged in the protective shell (4), a flexible gasket (5) is arranged between the pressure relief hole (32) and the protective shell (4), and a pressure relief groove (35) communicated with the pressure relief hole (32) is arranged on the outer side wall of the shell (36).

4. The hammer high pressure prevention device of claim 3, wherein: A motor (6) connected with the input shaft (34) is further arranged, a fan (7) is arranged on the output shaft of the motor (6), and an exhaust hole (41) is arranged on the protective shell (4).

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