Electric hammer with inverted cooling air duct

Abstract

The utility model relates to an electric hammer with an inverted cooling air duct, which comprises a casing, a cylinder component, a motor component, a radiating component and a controller, and the cylinder component, the motor component, the radiating component and the controller are all mounted in the casing. The motor assembly is provided with a rotating shaft penetrating through and extending out of the head and the tail of the motor assembly, the head of the rotating shaft is connected with the cylinder assembly, and the tail of the rotating shaft is connected with the heat dissipation assembly; the controller is connected with the motor assembly; an air inlet is formed in the casing close to the controller, and an air outlet is formed in the casing close to the radiating component; a cooling air duct is arranged in the machine shell, and the path of the cooling air duct is from the air inlet to the interior of the machine shell and then to the air outlet. According to the utility model, the motor assembly, the rotating shaft and the controller in the casing are simultaneously cooled through the cooling air duct.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric hammers, and particularly relates to an electric hammer with an inverted cooling air duct. Background Art

[0002] The construction of a rotary hammer is both precise and crucial, with its key components broadly divided into several areas. First, the main structure consists of the motor, which provides a constant source of power for the hammer. Second, there's the cylinder assembly and the drill bit. The drill bit, the primary tool for drilling, is typically made of cemented carbide, offering exceptional hardness and wear resistance. The drill bit is driven by the cylinder assembly, which is powered by the motor.

[0003] In addition, there are external protective covers and handles. The protective cover not only protects the internal mechanical structure from dust and impurities, but also provides safety for the operator. The handle is designed with ergonomic principles in mind, ensuring comfort even during long-term use.

[0004] As a complex tool, every component of a rotary hammer plays a vital role. Strictly following operating procedures during assembly and use ensures proper function and operator safety. At the same time, every part reflects the ingenuity and practicality of its engineering design.

[0005] Inside the hammer, a sophisticated and complex process is constantly underway. Besides the powerful motor driving the hammer's strikes, a crucial cooling system silently works to ensure the hammer's stable and stable operation.

[0006] In existing lithium-ion rotary hammers, the fan blades that dissipate heat are typically placed between the motor and cylinder assembly, sharing the same motor shaft as the cylinder. While this design effectively cools the motor, it also has obvious limitations. Cooling the controller, which is farther from the fan blades, is less effective. The densely packed electronic components within the controller gradually heat up over time, and this accumulated heat significantly impacts the hammer's performance.

[0007] From the above, it can be seen that although the existing technology can cool the electric hammer, it can only effectively cool the motor part inside the electric hammer, and cannot cool the controller. Since the temperature of the controller continues to rise during use without being relieved, the controller will face the situation of overheating, failure or necrosis, causing the electric hammer to face the problems of low operating efficiency and short service life. Utility Model Content

[0008] The technical problem to be solved by the utility model is to provide an electric hammer with an inverted cooling air duct, which can cool the motor assembly, the rotating shaft and the controller in the casing at the same time through the cooling air duct.

[0009] The utility model provides an electric hammer with an inverted cooling air duct, comprising a casing, a cylinder assembly, a motor assembly, a heat dissipation assembly, and a controller, wherein the cylinder assembly, the motor assembly, the heat dissipation assembly, and the controller are all installed in the casing; the motor assembly is provided with a rotating shaft that passes through and extends from the head and tail of the motor assembly, the head of the rotating shaft is connected to the cylinder assembly, and the tail of the rotating shaft is connected to the heat dissipation assembly; the controller is connected to the motor assembly; the casing is provided with an air inlet near the controller, and an air outlet near the heat dissipation assembly; a cooling air duct is provided in the casing, and the cooling air duct path is from the air inlet to the casing and then to the air outlet. Due to the action of the heat dissipation assembly, external cold air flows into the casing from the air inlet, takes away the heat of the components in the casing, and is then discharged from the air outlet, thereby completing the cycle and cooling the components in the casing.

[0010] Preferably, the casing includes a front shell, a rear shell connected to the front shell, and a lower shell connected to the front shell. The cylinder assembly is installed in the front shell, the motor assembly and the heat dissipation assembly are installed in the rear shell, the rear shell is provided with an air outlet near the heat dissipation assembly, the controller is installed in the lower shell, and the lower shell is provided with an air inlet near the controller.

[0011] Preferably, the cooling air duct path is from the air inlet to the four sides of the controller in the casing, then to the four sides of the motor assembly, and then to the air outlet.

[0012] Preferably, the heat dissipation component is a centrifugal fan blade, which rotates to form vortex air in the cooling air duct of the casing.

[0013] Preferably, there is a gap between the motor assembly and the cylinder assembly, so that the motor assembly is fully exposed to air.

[0014] Preferably, there are a plurality of air inlets, so as to allow a large amount of external cold air to enter.

[0015] Preferably, the air outlet is provided with a plurality of outlets, so as to quickly discharge the air in the casing.

[0016] Preferably, a battery pack is connected below the lower housing to provide power for the electric hammer.

[0017] The utility model has the following technical effects:

[0018] 1. The cooling air duct is formed by the heat dissipation assembly acting on the casing, the cooling air flows into the controller from the air inlet, and then flows around the motor assembly and is discharged from the air outlet, so that the external cold air is sucked into the casing through the air inlet under the action of the heat dissipation assembly, and the flow of air in the casing is accelerated, the external cold air enters from the air inlet, first cools the controller, and then flows upwards along the cooling air duct, cools the motor assembly and the shaft, and is discharged from the air outlet under the action of the heat dissipation assembly. Through the action of the shaft penetrating and extending through the head and tail of the motor assembly, the cylinder assembly and the heat dissipation assembly can be started at the same time after the motor assembly is started, and the effect of cooling the motor assembly, the shaft and the controller is achieved while the electric hammer is working, without additional energy consumption.

[0019] 2. Since the controller is close to the air inlet, the external cold air can sufficiently cool the controller, and since the motor assembly is close to the heat dissipation assembly, the air flow speed around the motor assembly and the shaft is faster, and the cooling effect is the strongest, so that the problem of the cooling air entering the casing to cool the controller and then heating up when reaching the motor assembly and the shaft is not considered, and the motor assembly, the shaft and the controller can be sufficiently cooled. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The present application is a cross-sectional structure schematic view.

[0021] In the figure: 1, the casing; 11, the front shell; 12, the rear shell; 13, the lower shell; 2, the cylinder assembly; 3, the motor assembly; 31, the shaft; 4, the heat dissipation assembly; 5, the controller; 6, the cooling air duct; 61, the air inlet; 62, the air outlet; 7, the battery pack. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be specifically described below with reference to the drawings.

[0023] As Figure 1As shown, an electric hammer with an inverted cooling air duct 6 includes a housing 1, a cylinder assembly 2, a motor assembly 3, a heat sink assembly 4, and a controller 5. The cylinder assembly 2, motor assembly 3, heat sink assembly 4, and controller 5 are all installed in the housing 1. The motor assembly 3 is provided with a rotating shaft 31 that passes through and extends from the head and tail of the motor assembly 3. The head of the rotating shaft 31 is connected to the cylinder assembly 2, and the tail of the rotating shaft 31 is connected to the heat sink 4. The controller 5 is connected to the motor assembly 3. The housing 1 is provided with an air inlet 61 near the controller 5 and an air outlet 62 near the heat sink 4. The housing 1 is provided with a cooling air duct 6, which runs from the air inlet 61 into the housing 1 and then to the air outlet 62. Due to the action of the heat sink 4, external cold air flows into the housing 1 from the air inlet 61, removes heat from the components in the housing 1, and is then discharged from the air outlet 62. This cycle completes the cooling of the components in the housing 1.

[0024] The casing 1 includes a front shell 11, a rear shell 12 matched with the front shell 11, and a lower shell 13 matched with the front shell 11. The cylinder assembly 2 is installed in the front shell 11, the motor assembly 3 and the heat dissipation assembly 4 are installed in the rear shell 12, and the rear shell 12 is provided with an air outlet 62 near the heat dissipation assembly 4. The controller 5 is installed in the lower shell 13, and the lower shell 13 is provided with an air inlet 61 near the controller 5.

[0025] The cooling air duct 6 runs from the air inlet 61 to the four sides of the controller 5 in the housing 1, then to the four sides of the motor assembly 3, and finally to the air outlet 62. The cooling air duct 6 is formed in the housing 1 through the action of the heat dissipation component 4, which flows from the air inlet 61 to the four sides of the controller 5, then to the four sides of the motor assembly 3, and finally to the air outlet 62. The cooling air duct 6 is formed in the housing 1, and the air flows from the four sides of the motor assembly 3 to the four sides of the motor assembly 3. The external cold air is sucked into the housing 1 through the air inlet 61 under the action of the heat dissipation component 4 and accelerates the flow of air inside the housing 1. After entering from the air inlet 61, the external cold air first cools the controller 5, and moves upward along the direction of the cooling air duct 6, cooling the motor assembly 3 and the rotating shaft 31, and then is discharged from the air outlet 62 through the action of the heat dissipation component 4. Through the action of the rotating shaft 31 that penetrates and extends from the head and tail of the motor assembly 3, after the motor assembly 3 is started, the cylinder assembly 2 and the heat dissipation component 4 can be started at the same time, and the effect of cooling the motor assembly 3, the rotating shaft 31 and the controller 5 can be achieved while the electric hammer is operating, without the need for additional energy consumption. Since the controller 5 is close to the air inlet 61, the external cold air can fully cool down the controller 5; and since the motor assembly 3 is close to the heat dissipation assembly 4, the air flow rate around the motor assembly 3 and the rotating shaft 31 is faster, and the cooling effect is the strongest. Therefore, there is no need to worry about the problem of cold air entering the casing 1 to cool down the controller 5 and then heating up when it reaches the motor assembly 3 and the rotating shaft 31. The motor assembly 3, the rotating shaft 31 and the controller 5 can be fully cooled.

[0026] The heat dissipation assembly 4 is a centrifugal fan blade. The rotation of the centrifugal fan blade forms vortex air in the cooling air duct 6 of the casing 1.

[0027] There is a gap between the motor assembly 3 and the cylinder assembly 2. The motor assembly 3 is fully exposed to air.

[0028] The air inlet 61 is provided with a plurality of them, so that a large amount of external cold air can enter.

[0029] The air outlets 62 are provided in a plurality to quickly discharge the air in the housing 1 .

[0030] A battery pack 7 is connected below the lower housing 13 to provide power for the electric hammer.

[0031] A cooling method for an electric hammer with an inverted cooling air duct is as follows:

[0032] After the motor is turned on, the heat dissipation component 4 starts working, forming a vortex in the cavity of the casing 1, and external cold air is sucked into the interior of the lower shell 13 from the air inlet 61. After the cold air enters the casing 1 through the air inlet 61, it first comes into contact with the controller 5. Here, the cold air quickly absorbs the heat of the controller 5 and cools it down, effectively preventing the controller 5 from experiencing performance degradation or damage due to overheating. Subsequently, the cooling air duct 6 guides this cold air upward and flows toward the motor assembly 3. The motor assembly 3 is the part of the equipment that generates the most heat, so it needs to be cooled more efficiently. When the cold air flows through the motor assembly 3, it also takes away the heat from the motor assembly 3 and the rotating shaft 31 on the motor assembly 3. In addition, the motor assembly 3 is closest to the heat dissipation component 4, and the cold air flow rate is fast, so that the temperature of the motor assembly 3 and the rotating shaft 31 can be quickly reduced to maintain its normal working state. Finally, when the cool air is discharged from the air outlet 62 by the heat sink assembly 4, it has completed its cooling mission within the housing 1. New external cool air continues to enter through the air inlet 61, forming a continuous cooling cycle. This cooling method can simultaneously cool the motor assembly 3, the rotating shaft 31, and the controller 5, not only ensuring efficient operation of the equipment but also extending its service life. Furthermore, because the motor assembly 3 drives the heat sink assembly 4 and the cylinder assembly 2 simultaneously, no additional energy consumption is required, achieving efficient cooling and cost savings.

[0033] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements to the technical solutions of the present invention made by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. An electric hammer with an inverted cooling air duct, characterized in that: It includes a casing, a cylinder assembly, a motor assembly, a heat dissipation assembly, and a controller, and the cylinder assembly, motor assembly, heat dissipation assembly, and controller are all installed in the casing; the motor assembly is provided with a rotating shaft that passes through and extends out of the head and tail of the motor assembly, the head of the rotating shaft is connected to the cylinder assembly, and the tail of the rotating shaft is connected to the heat dissipation assembly; the controller is connected to the motor assembly; the casing is provided with an air inlet near the controller, and an air outlet near the heat dissipation assembly; a cooling air duct is provided in the casing, and the cooling air duct path is from the air inlet to the casing and then to the air outlet.

2. The electric hammer with an inverted cooling air duct according to claim 1, characterized in that: The casing includes a front shell, a rear shell connected to the front shell, and a lower shell connected to the front shell. The cylinder assembly is installed in the front shell, the motor assembly and the heat dissipation assembly are installed in the rear shell, the rear shell is provided with an air outlet near the heat dissipation assembly, the controller is installed in the lower shell, and the lower shell is provided with an air inlet near the controller.

3. The electric hammer with an inverted cooling air duct according to claim 2, characterized in that: The cooling air duct path is from the air inlet to the four sides of the controller in the casing, then to the four sides of the motor assembly, and then to the air outlet.

4. The electric hammer with an inverted cooling air duct according to claim 1, characterized in that: The heat dissipation component is a centrifugal fan blade.

5. The electric hammer with an inverted cooling air duct according to claim 1, characterized in that: There is a gap between the motor assembly and the cylinder assembly.

6. The electric hammer with an inverted cooling air duct according to claim 1 or 2, characterized in that: There are several air outlets.

7. The electric hammer with an inverted cooling air duct according to claim 1 or 2, characterized in that: There are several air inlets.

8. The electric hammer with an inverted cooling air duct according to claim 2, characterized in that: A battery pack is connected below the lower shell.

Images