Electric hammer motor overload protection structure

Abstract

The utility model discloses an electric hammer motor overload protection structure. The utility model discloses, including electric hammer body: electric hammer body bottom is installed motor casing, both sides of motor casing all are installed heat conduction piece, the inside of motor casing is provided with the fixing frame, the inside of motor casing is installed motor through the fixing frame, the middle position of fixing frame one end is provided with overload protector, the bottom of motor is provided with the cooling fan, the bottom of motor casing is provided with the base, both sides and the bottom of base all are provided with the heat dissipation mouth. The utility model discloses, is provided with overload protector, if the motor in electric hammer appears the phenomenon of overload, and overload protector can cut off the power of motor in time, avoids the element in motor and is damaged, and is provided with cooling fan and heat conduction piece, can discharge the heat in motor casing in time, prevents the element in high temperature damage inside motor.

Description

Technical Field

[0001] This utility model relates to the field of power tool technology, specifically to an overload protection structure for an electric hammer motor. Background Technology

[0002] A hammer drill is a power tool that can both rotate and impact. It uses the reciprocating motion of a piston to compress air in a cylinder to impact the tail of the drill bit to make a hole. The hammer drill does not require much force during the impact process, and the impact force is much greater than that of a drill bit, but the vibration is relatively large. It is mainly used for drilling holes in concrete and natural stone, and can also be used for demolishing floor slabs and walls, but it cannot be used for drilling holes in metal.

[0003] Due to the limited size of electric hammers, it is impossible to install an overload protection structure inside them. This can cause the motor to overload during operation, resulting in excessive current and a large amount of heat being generated. Since air has low heat transfer efficiency, the heat cannot be dissipated in time, and the high temperature can easily damage the internal components of the motor, thus reducing its lifespan. Utility Model Content

[0004] The purpose of this utility model is to provide an overload protection structure for electric hammer motors to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an overload protection structure for an electric hammer motor, comprising an electric hammer body: a motor housing is installed at the bottom of the electric hammer body, heat-conducting plates are installed on both sides of the motor housing, a fixing frame is provided inside the motor housing, a motor is installed inside the motor housing via the fixing frame, an overload protector is provided at the middle position of one end of the fixing frame, a cooling fan is provided at the bottom of the motor, a base is provided at the bottom of the motor housing, and heat dissipation vents are provided on both sides and at the bottom of the base.

[0006] By adopting the above technical solution, when the electric hammer is working, the motor is equipped with an overload protector. If the motor inside the electric hammer is overloaded, the overload protector on the motor can cut off the motor power in time to prevent the motor from being damaged. Moreover, with the assistance of heat conduction plates and cooling fans, the electric hammer can quickly dissipate the heat dissipated by the motor in time during operation, avoiding high temperature damage to the internal components of the motor.

[0007] Preferably, the motor housing has mounting ports on both sides, the size of the mounting ports on the motor housing is adapted to the size of the heat-conducting sheet, and the motor housing is connected to the heat-conducting sheet through the mounting ports.

[0008] By adopting the above technical solution, the heat-conducting plate can be stably and firmly installed on the motor housing through the mounting port. Moreover, the heat-conducting plate is in contact with the inside of the motor housing, which can transfer the heat inside the motor housing to the outside, thereby achieving the purpose of cooling and heat dissipation.

[0009] Preferably, both ends of the rotor inside the motor extend to the outside, and the bottom of the motor is connected to the cooling fan through the rotor.

[0010] By adopting the above technical solution, during the operation of the motor, the rotor inside the motor drives the cooling fan to rotate, so that the cooling fan can dissipate heat from the motor.

[0011] Preferably, the motor is electrically connected to the overload protector, and a baffle is provided on the outer surface of the motor's output end.

[0012] By adopting the above technical solution, if the motor is overloaded while it is working, the overload protector will cut off the power supply to the motor, so that the motor can be shut down in time and the motor can be prevented from being damaged due to overload.

[0013] Preferably, the fixing frame is sleeved with the motor, and the motor is connected to the motor housing through the fixing frame.

[0014] By adopting the above technical solution, the motor is stably and securely installed inside the motor housing by the fixing bracket, which can prevent the motor from shaking inside the motor housing and improve the stability of the motor.

[0015] Preferably, threaded holes are provided at both ends of the bottom of the motor housing, and through holes are provided at both ends of the bottom of the base. The positions of the threaded holes on the motor housing correspond to the positions of the through holes on the base.

[0016] By adopting the above technical solution, the base is stably and securely installed on the motor housing through threaded holes and through holes.

[0017] Preferably, a mounting component is provided on the top of the motor housing, and the motor housing is connected to the electric hammer body through the mounting component.

[0018] By adopting the above technical solution, the motor housing is stably and securely installed on the electric hammer body through the mounting parts, which can prevent the motor housing from falling off the electric hammer body.

[0019] Compared with the prior art, the beneficial effects of this utility model are: the electric hammer motor overload protection structure is equipped with an overload protector. If the motor inside the electric hammer is overloaded, the overload protector can cut off the power supply to the motor in time to avoid damage to the components inside the motor. In addition, it is equipped with a cooling fan and heat conduction plate to dissipate the heat inside the motor housing in time and prevent high temperature damage to the internal components of the motor. Attached Figure Description

[0020] Figure 1 This is a perspective view of the electric hammer of this utility model;

[0021] Figure 2 This is a perspective view of the motor housing of this utility model;

[0022] Figure 3 This is a front view of the motor housing of this utility model;

[0023] Figure 4 This is a side view of the motor housing of this utility model;

[0024] Figure 5 This is a front sectional view of the motor housing of this utility model;

[0025] Figure 6 This is the front view of the motor of this utility model.

[0026] In the diagram: 1. Electric hammer body; 2. Motor housing; 3. Heat-conducting plate; 4. Fixing frame; 5. Motor; 6. Overload protector; 7. Cooling fan; 8. Base; 9. Heat dissipation vent. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1-6 This utility model provides an embodiment of an overload protection structure for an electric hammer motor, comprising an electric hammer body 1: a motor housing 2 is installed at the bottom of the electric hammer body 1, heat-conducting plates 3 are installed on both sides of the motor housing 2, a fixing frame 4 is provided inside the motor housing 2, and a motor 5 is installed inside the motor housing 2 through the fixing frame 4. An overload protector 6 is provided at the middle position of one end of the fixing frame 4, a cooling fan 7 is provided at the bottom of the motor 5, and a base 8 is provided at the bottom of the motor housing 2. Heat dissipation vents 9 are provided on both sides and the bottom of the base 8. When the electric hammer is working, because the motor 5 is equipped with an overload protector 6, if the motor 5 inside the electric hammer experiences an overload, the overload protector 6 on the motor 5 can cut off the power supply to the motor 5 in time to prevent damage to the motor 5. Moreover, with the assistance of the heat-conducting plates 3 and the cooling fan 7, the electric hammer can quickly dissipate the heat emitted by the motor 5 during operation, avoiding damage to the internal components of the motor 5 due to high temperature.

[0029] In this embodiment, mounting ports are provided on both sides of the motor housing 2. The size of the mounting ports on the motor housing 2 is adapted to the size of the heat-conducting plate 3. The motor housing 2 is connected to the heat-conducting plate 3 through the mounting ports. The heat-conducting plate 3 can be stably and firmly installed on the motor housing 2 through the mounting ports. Moreover, the heat-conducting plate 3 is in contact with the inside of the motor housing 2, which can transfer the heat inside the motor housing 2 to the outside, thereby achieving the purpose of cooling and heat dissipation.

[0030] In this embodiment, both ends of the rotor inside the motor 5 extend to the outside. The bottom of the motor 5 is connected to the cooling fan 7 through the rotor. During operation, the rotor inside the motor 5 drives the cooling fan 7 to rotate, so that the cooling fan 7 can dissipate heat from the motor 5.

[0031] In this embodiment, the motor 5 is electrically connected to the overload protector 6. A baffle is provided on the outer surface of the output end of the motor 5. When the motor 5 is working, if the motor 5 is overloaded, the overload protector 6 will cut off the power supply to the motor 5 so that the motor 5 can be shut down in time to avoid damage to the motor 5 due to overload.

[0032] In this embodiment, the fixing frame 4 is sleeved with the motor 5, and the motor 5 is connected to the motor housing 2 through the fixing frame 4. The motor 5 is stably and securely installed inside the motor housing 2 through the fixing frame 4, which can prevent the motor 5 from shaking inside the motor housing 2 and improve the stability of the motor 5.

[0033] In this embodiment, threaded holes are provided at both ends of the bottom of the motor housing 2, and through holes are provided at both ends of the bottom of the base 8. The positions of the threaded holes on the motor housing 2 correspond to the positions of the through holes on the base 8. The base 8 is stably and securely installed on the motor housing 2 through the threaded holes and through holes.

[0034] In this embodiment, a mounting component is provided on the top of the motor housing 2. The motor housing 2 is connected to the electric hammer body 1 through the mounting component. The motor housing 2 is stably and firmly installed on the electric hammer body 1 through the mounting component, which can prevent the motor housing 2 from falling off the electric hammer body 1.

[0035] Working principle: When the electric hammer is in use, if the drill bit on the electric hammer gets stuck, the overload protector 6 can cut off the power supply to the motor 5 inside the electric hammer in time to prevent the motor 5 inside the electric hammer from being damaged due to overload. In addition, when the motor 5 inside the electric hammer is working, the cooling fan 7 and the heat conduction plate 3 can dissipate the heat inside the motor housing 2 to prevent the components inside the motor 5 from being damaged due to high temperature.

[0036] For those skilled in the art, this invention is not limited to the details of the exemplary embodiments described above, and can be implemented in other specific forms without departing from the spirit or scope of this invention. Therefore, the embodiments of this invention are exemplary and not restrictive. The scope of this invention is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An overload protection structure for an electric hammer motor, comprising an electric hammer body (1), characterized in that: The electric hammer body (1) has a motor housing (2) installed at the bottom. Heat-conducting plates (3) are installed on both sides of the motor housing (2). A fixing frame (4) is provided inside the motor housing (2). A motor (5) is installed inside the motor housing (2) through the fixing frame (4). An overload protector (6) is provided at the middle position of one end of the fixing frame (4). A cooling fan (7) is provided at the bottom of the motor (5). A base (8) is provided at the bottom of the motor housing (2). Heat dissipation vents (9) are provided on both sides and at the bottom of the base (8).

2. The overload protection structure for an electric hammer motor according to claim 1, characterized in that: The motor housing (2) has mounting ports on both sides. The size of the mounting ports on the motor housing (2) is adapted to the size of the heat-conducting plate (3). The motor housing (2) is connected to the heat-conducting plate (3) through the mounting ports.

3. The overload protection structure for an electric hammer motor according to claim 1, characterized in that: Both ends of the rotor inside the motor (5) extend to the outside, and the bottom of the motor (5) is connected to the cooling fan (7) through the rotor.

4. The overload protection structure for an electric hammer motor according to claim 1, characterized in that: The motor (5) is electrically connected to the overload protector (6), and a baffle is provided on the outer surface of the output end of the motor (5).

5. The overload protection structure for an electric hammer motor according to claim 1, characterized in that: The fixing frame (4) is sleeved with the motor (5), and the motor (5) is connected to the motor housing (2) through the fixing frame (4).

6. The overload protection structure for an electric hammer motor according to claim 1, characterized in that: The motor housing (2) has threaded holes at both ends of its bottom, and the base (8) has through holes at both ends of its bottom. The positions of the threaded holes on the motor housing (2) correspond to the positions of the through holes on the base (8).

7. The overload protection structure for an electric hammer motor according to claim 1, characterized in that: The motor housing (2) is provided with a mounting component on its top, and the motor housing (2) is connected to the electric hammer body (1) through the mounting component.

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