Electric hammer with double fan blades

Abstract

The utility model relates to an electric hammer with double fan blades, which comprises a casing, a cylinder assembly, a motor assembly, a heat dissipation assembly, a wind partition plate and a controller, the heat dissipation assembly comprises a first fan blade, a second fan blade and a fan blade connecting plate, the wind partition plate is connected between the fan blade connecting plate and the casing, a first cavity and a second cavity which are mutually independent are formed in the casing, and the first cavity and the second cavity are communicated with each other. The cylinder assembly, the first fan blade and the controller are located in the first cavity, the motor assembly and the second fan blade are located in the second cavity, a first cooling air inlet is formed in the portion, close to the controller, of the machine shell, a first cooling air outlet is formed in the portion, close to the first fan blade, of the machine shell, and a second cooling air inlet is formed in the portion, close to the tail of the motor assembly, of the machine shell. A second cooling air outlet is formed in the position close to the second fan blade, the first cavity is provided with a first cooling air channel, and the second cavity is provided with a second cooling air channel. According to the utility model, the air pressure in the shell is enhanced, so that the air in the shell is quickly exhausted, and the cooling effect is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric hammers, in particular to an electric hammer with double fan blades. Background Art

[0002] A rotary hammer is a tool used on construction sites or in interior renovation projects, serving as a valuable aid for professional workers. Its powerful and rapid rotational force enables it to drill holes in hard materials, from concrete to stone. It works by using a motor to drive the drill bit at high speed, generating a powerful impact force to complete the drilling task.

[0003] The heat dissipation component is a key part of any electrical equipment, especially in high-intensity electric hammers. Electric hammers generate a lot of heat during continuous operation. If the heat is not properly dissipated, it will not only damage the internal structure of the motor, but also affect its working efficiency and life.

[0004] The heat dissipation component's primary task is to maintain a stable temperature inside the hammer. It typically consists of a set of fans. These fans draw in cool air from the outside and remove the hot air from the inside, removing more heat and lowering the temperature around the motor to maintain air circulation. This efficient heat dissipation system, which continuously removes hot air, ensures the hammer's continued stable operation and extends its lifespan.

[0005] In existing lithium-ion electric hammers, the fan device, which serves as a heat dissipation component, is a single-sided fan blade that is placed between the motor and the cylinder assembly and shares a motor shaft with the cylinder. Although this design can effectively cool the motor, its limitations are also obvious. For the controller part that is far away from the fan blade, the cooling effect is not satisfactory. The dense electronic components in the controller will gradually heat up after long-term operation, and this accumulation of heat has a huge impact on the performance of the electric hammer. In addition, due to the long path inside the electric hammer housing, heat continues to accumulate. By the time it reaches the motor and the mechanical rotating part of the shaft, the inhaled external cold air has already heated up, and the cooling effect is poor, causing the electric hammer to face the problems of low operating efficiency and short service life.

[0006] Chinese patent publication number CN210099940U discloses an electric hammer with heat dissipation function, comprising an electric hammer body, an electric hammer spindle, and a handshake. The surface of the electric hammer spindle is fixedly connected to a driven bevel gear, the output end of the drive motor is fixedly connected to a rotating shaft, the surface of the rotating shaft near the middle is fixedly connected to a fan blade, the circumferential surface of the drive motor is fixedly connected to a heat-conducting layer filled with thermal grease, the surface of the heat-conducting layer is rotatably connected to a heat-conducting column via a bearing, the circumferential surface of the heat-conducting column is fixedly connected to a heat sink, and the surface of the heat sink is rotatably connected to a heat dissipation mechanism via a bearing. Although the heat-conducting column can solve the heat dissipation problem of the rotating shaft mechanical part, a large amount of hot air will still accumulate in the housing cavity and cannot be discharged quickly and promptly. Utility Model Content

[0007] The technical problem to be solved by the present invention is to provide an electric hammer with double fan blades, which strengthens the wind pressure in the casing and improves the wind flow rate in the casing through the first fan blade and the second fan blade, so that the air in the casing is quickly discharged, thereby greatly improving the cooling effect.

[0008] The utility model provides an electric hammer with double fan blades, which includes a casing, a cylinder assembly, a motor assembly, a heat dissipation assembly, a wind shield, and a controller. The cylinder assembly, the motor assembly, the heat dissipation assembly, the wind shield, and the controller are all installed in the casing; the motor assembly head is provided with a rotating shaft, the rotating shaft is sequentially connected to the heat dissipation assembly and the cylinder assembly, and the control circuit of the controller is connected to the motor assembly; the heat dissipation assembly includes a first fan blade, a second fan blade and a fan blade connecting plate, the first fan blade and the second fan blade are respectively fixed to the front and back sides of the fan blade connecting plate, the wind shield The plate is connected between the fan blade connecting plate and the casing, forming a first cavity and a second cavity that are independent of each other in the casing. The cylinder assembly, the first fan blade, and the controller are located in the first cavity, and the motor assembly and the second fan blade are located in the second cavity. The casing is provided with a first cooling air inlet near the controller, a first cooling air outlet near the first fan blade, a second cooling air inlet near the tail of the motor assembly, and a second cooling air outlet near the second fan blade. The first cavity is provided with a first cooling air duct, and the second cavity is provided with a second cooling air duct.

[0009] Preferably, the first fan blade and the second fan blade are both composed of a plurality of evenly arranged fan blades.

[0010] Preferably, the first cooling air duct path is from the first cooling air inlet to the first cavity and then to the first cooling air outlet.

[0011] Preferably, the second cooling air duct path is from the second cooling air inlet to the second cavity and then to the second cooling air outlet.

[0012] Preferably, there are gaps between the motor assembly, the heat dissipation assembly, and the cylinder assembly, so that the cold air can fully contact the motor assembly, the heat dissipation assembly, the cylinder assembly, and the mechanical rotating parts of the shaft.

[0013] Preferably, the first cooling air outlet is provided in a plurality of portions to quickly draw external cold air into the first cavity.

[0014] Preferably, the first cooling air inlet is provided with a plurality of ports, so as to quickly discharge the air in the first cavity and achieve a stronger heat dissipation effect.

[0015] Preferably, the second cooling air outlet is provided in a plurality of portions to quickly draw external cold air into the second cavity.

[0016] Preferably, the second cooling air inlet is provided with a plurality of ports, so as to quickly discharge the air in the second cavity and achieve a stronger heat dissipation effect.

[0017] Preferably, a battery pack is connected below the first cavity to provide power to the motor assembly.

[0018] The utility model has the following technical effects:

[0019] 1. Since the heat dissipation component is composed of a first fan blade, a second fan blade and a fan blade connecting plate, and the first fan blade and the second fan blade are respectively fixed on the front and back sides of the fan blade connecting plate, the air in the casing forms two separate centrifugal vortex winds on the first fan blade and the second fan blade, and a first cavity and a second cavity independent of each other are formed in the casing through the wind partition plate. The first fan blade dissipates heat for the first cavity, and the second fan blade dissipates heat for the second cavity, thereby forming two independent cooling air ducts, a first cooling air duct and a second cooling air duct, inside the casing, shortening the distance between the heat dissipation component and the conventional air inlet and outlet, increasing the wind pressure in the casing, avoiding heat accumulation when a cooling air duct cools one component and then cools the next component, greatly improving the cooling effect, and at the same time quickly taking away dust that enters the casing with the cooling air when the device is working.

[0020] 2. The first cooling air duct cools the controller and the rotating shaft, heat dissipation component, and mechanical transmission structure surface of the cylinder component in the first cavity; the second cooling air duct cools the motor component and the rotating shaft, heat dissipation component, and mechanical transmission structure surface of the motor component in the second cavity. The first cooling air duct and the second cooling air duct are independent of each other. Since the heat dissipation component and the cylinder component are both connected to the rotating shaft of the motor component, when the motor component starts the cylinder component, the heat dissipation component is also started synchronously, and the first cooling air duct and the second cooling air duct start to operate. Therefore, without other losses, the heat dissipation component has stronger utilization efficiency and is more energy-saving and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural diagram of the utility model;

[0022] Figure 2 This is a schematic structural diagram of the heat dissipation component of the utility model;

[0023] Figure 3 This is a structural diagram of the heat dissipation component of the utility model from another perspective;

[0024] Figure 4 This is a structural schematic diagram of the heat dissipation component of the utility model from another perspective.

[0025] In the figure: 1. Casing; 11. First cavity; 12. Second cavity; 13. Wind shield; 2. Cylinder assembly; 3. Motor assembly; 31. Rotating shaft; 4. Heat dissipation assembly; 41. First fan blade; 42. Second fan blade; 43. Fan blade connecting plate; 5. Controller; 6. First cooling air duct; 61. First cooling air inlet; 62. First cooling air outlet; 7. Second cooling air duct; 71. Second cooling air inlet; 72. Second cooling air outlet; 8. Battery pack. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings.

[0027] like Figure 1 、 Figure 2, as shown, an electric hammer with double fan blades, which includes a casing 1, a cylinder assembly 2, a motor assembly 3, a heat dissipation assembly 4, a wind baffle 13, and a controller 5. The cylinder assembly 2, the motor assembly 3, the heat dissipation assembly 4, the wind baffle 13, and the controller 5 are all installed in the casing 1; the motor assembly 3 is provided with a rotating shaft 31 at the head, and the rotating shaft 31 is sequentially connected to the heat dissipation assembly 4 and the cylinder assembly 2, and the control circuit of the controller 5 is connected to the motor assembly 3; the heat dissipation assembly 4 includes a first fan blade 41, a second fan blade 42 and a fan blade connecting plate 43, the first fan blade 41 and the second fan blade 42 are respectively fixed to the front and back sides of the fan blade connecting plate 43, and the wind baffle 13 is connected Between the fan blade connecting plate 43 and the casing 1, a first cavity 11 and a second cavity 12 that are independent of each other are formed in the casing 1. The cylinder assembly 2, the first fan blade 41, and the controller 5 are located in the first cavity 11, and the motor assembly 3 and the second fan blade 42 are located in the second cavity 12. The casing 1 is provided with a first cooling air inlet 61 near the controller 5, a first cooling air outlet 62 near the first fan blade 41, a second cooling air inlet 71 near the tail of the motor assembly 3, and a second cooling air outlet 72 near the second fan blade 42. The first cavity 11 is provided with a first cooling air duct 6, and the second cavity 12 is provided with a second cooling air duct 7. Since the heat dissipation component 4 is composed of a first fan blade 41, a second fan blade 42 and a fan blade connecting plate 43, and the first fan blade 41 and the second fan blade 42 are respectively fixed on the front and back sides of the fan blade connecting plate 43, the air in the casing 1 forms two separate centrifugal vortex winds on the first fan blade 41 and the second fan blade 42, and the first cavity 11 and the second cavity 12 independent of each other are formed in the casing 1 through the wind baffle 13. The first fan blade 41 dissipates heat for the first cavity 11, and the second fan blade 42 dissipates heat for the second cavity 12, thereby forming two independent cooling air ducts, a first cooling air duct 6 and a second cooling air duct 7, inside the casing 1, shortening the distance between the heat dissipation component 4 and the conventional air inlet and outlet, strengthening the wind pressure in the casing 1, avoiding the heat accumulation of a cooling air duct after cooling one component and then cooling the next component, greatly improving the cooling effect, and at the same time quickly taking away the dust that enters the casing 1 with the cooling wind when the device is working. The controller 5 and the rotating shaft 31 located in the first cavity 11 and the heat dissipation component 4, the mechanical transmission structure surface of the cylinder assembly 2 are cooled through the first cooling air duct 6, and the motor assembly 3 and the rotating shaft 31 located in the second cavity 12 and the heat dissipation component 4, the mechanical transmission structure surface of the motor assembly 3 are cooled through the second cooling air duct 7. The first cooling air duct 6 and the second cooling air duct 7 are independent of each other. Since the heat dissipation component 4 and the cylinder assembly 2 are both connected to the rotating shaft 31 of the motor assembly 3, when the motor assembly 3 starts the cylinder assembly 2, the heat dissipation component 4 is also started synchronously, and the first cooling air duct 6 and the second cooling air duct 7 start to operate. Therefore, without other losses, the heat dissipation component 4 has a higher utilization efficiency and is more energy-saving and efficient.

[0028] like Figure 3 、 Figure 4 As shown, the first fan blade 41 and the second fan blade 42 are both composed of a plurality of evenly arranged fan blades.

[0029] The first cooling air duct 6 extends from the first cooling air inlet 61 to the first cavity 11 and then to the first cooling air outlet 62 .

[0030] The second cooling air duct 7 extends from the second cooling air inlet 71 to the second cavity 12 and then to the second cooling air outlet 72 .

[0031] There are gaps between the motor assembly 3, the heat dissipation assembly 4, and the cylinder assembly 2, so that the cold air can fully contact the mechanical rotating parts of the motor assembly 3, the heat dissipation assembly 4, the cylinder assembly 2, and the rotating shaft 31.

[0032] The first cooling air outlets 62 are provided in a plurality to quickly draw external cold air into the first cavity 11 .

[0033] The first cooling air inlet 61 is provided with a plurality of them, so as to quickly discharge the air in the first cavity 11 and achieve a stronger heat dissipation effect.

[0034] The second cooling air outlets 72 are provided in a plurality to quickly draw external cold air into the second cavity 12 .

[0035] The second cooling air inlet 71 is provided in a plurality to quickly discharge the air in the second cavity 12, thereby achieving a stronger heat dissipation effect.

[0036] A battery pack 8 is connected below the first cavity 11 to provide power to the motor assembly 3.

[0037] A cooling method for an electric hammer with double fan blades is as follows:

[0038] After the motor assembly 3 is turned on, the cylinder assembly 2 and the heat dissipation assembly 4 both start working, and the first fan blade 41 and the second fan blade 42 simultaneously form a vortex in the cavity of the casing 1. The first fan blade 41 forms a vortex in the first cavity 11, and the external cold air is sucked into the first cavity 11 from the first cooling air inlet 61. The external cold air contacts the controller 5, takes away the heat of the controller 5, and moves upward along the first cooling air duct 6 to take away the heat from the rotating shaft 31 and the heat dissipation assembly 4, and the mechanical transmission structure surface of the cylinder assembly 2, and finally discharges the hot air in the first cavity 11 from the first cooling air outlet 62. The second fan blade 42 forms a vortex in the second cavity 12, and the external cold air is sucked into the second cavity 12 from the second cooling air inlet 71. The external cold air contacts the motor assembly 3, takes away the heat of the motor assembly 3, and moves upward along the second cooling air duct 7 to take away the heat from the rotating shaft 31 and the heat dissipation assembly 4, and the mechanical transmission structure surface of the motor assembly 3, and finally discharges the hot air in the second cavity 12 from the second cooling air outlet 72. Since the casing 1 has independent first cooling air duct 6 and second cooling air duct 7 , the first fan blades 41 and second fan blades 42 form strong wind pressure in the casing 1 , have good cooling effect, and have a strong cleaning effect on the cavity of the casing 1 .

[0039] 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 double blades, characterized in that: The radiator fan is connected to the heat dissipation device of the motor vehicle body through the air filter, and the radiator fan is connected to the heat dissipation device of the motor vehicle body through the air filter.

2. The electric hammer with double blades according to claim 1, characterized in that: The first fan blade and the second fan blade are both composed of a plurality of evenly arranged fan blades.

3. The electric hammer with double blades according to claim 1, characterized in that: The first cooling air duct path is from the first cooling air inlet to the first cavity and then to the first cooling air outlet.

4. The electric hammer with double blades according to claim 1, characterized in that: The second cooling air duct path is from the second cooling air inlet to the second cavity and then to the second cooling air outlet.

5. The electric hammer with double blades according to claim 1, characterized in that: There are gaps between the motor assembly, the heat dissipation assembly and the cylinder assembly.

6. The electric hammer with double blades according to claim 1, characterized in that: There are a plurality of first cooling air outlets.

7. The electric hammer with double blades according to claim 1, characterized in that: There are a plurality of first cooling air inlets.

8. The electric hammer with double blades according to claim 1, characterized in that: There are a plurality of second cooling air outlets.

9. The electric hammer with double blades according to claim 1, characterized in that: There are a plurality of second cooling air inlets.

10. The electric hammer with double blades according to claim 1, characterized in that: A battery pack is connected below the first cavity.

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