Heat dissipation structure of electric hammer

Abstract

The utility model discloses a heat dissipation structure of an electric hammer, which relates to the technical field of electric hammers and comprises an electric hammer rear shell, an electric hammer middle shell is clamped on the front side of the electric hammer rear shell, an electric hammer front shell is clamped on the front side of the electric hammer middle shell, and an electric hammer handle shell is arranged on the rear side of the electric hammer rear shell. A motor is arranged in an inner cavity of the electric hammer rear shell, a fan shell is arranged on the front side of the motor, and the fan shell is fixedly installed on the front side of the inner wall of the electric hammer rear shell. According to the electric hammer, the air inlet hole, the fan shell, the heat dissipation fan, the first middle shell heat dissipation holes and the second middle shell heat dissipation holes are matched with one another, so that the motor of the electric hammer can drive the hammer body while being started, the heat dissipation fan can also be driven to rotate at a high speed, external air is rapidly guided into the rear shell of the electric hammer, and therefore the electric hammer can be used conveniently. And heat generated by the motor is quickly discharged through the motor heat dissipation holes, so that the heat dissipation efficiency of the motor of the electric hammer is improved, and the service life of electronic elements in the electric hammer is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric hammer technical field, concretely relates to a heat dissipation structure of electric hammer. BACKGROUND

[0002] Electric hammer is a kind of tool driven by electric power, it can transmit power to drill bit by high-speed rotating hammer head, reaches the purpose such as punching, chiseling wall, demolishing old wall.Compared with ordinary electric drill, the hammer head of electric hammer can repeatedly knock at certain frequency, so as to more easily penetrate hard material, easily chisel out the opening such as window, door, facilitate the decoration and reconstruction of house.For the following problems existing in prior art:

[0003] Because the existing electric hammer mainly relies on internal motor to drive, but due to the internal motor of electric hammer generates heat under load after long time work, only rely on the heat dissipation hole of shell to be opened cannot quickly dissipate heat, thereby leading to the internal temperature of electric hammer is easy to rise, makes its internal other electronic components work in high temperature environment for a long time, service life is shortened. CONTENT OF THE UTILITY MODEL

[0004] The utility model provides a kind of heat dissipation structure of electric hammer to solve the problems presented in above background technique.

[0005] To solve the above technical problems, the technical scheme adopted by the utility model is:

[0006] A kind of heat dissipation structure of electric hammer, including electric hammer rear shell body, the front side of the electric hammer rear shell body is clamped with electric hammer middle shell body, the front side of the electric hammer middle shell body is clamped with electric hammer front shell body, the rear side of the electric hammer rear shell body is provided with electric hammer handle shell body, the inner chamber of the electric hammer rear shell body is provided with motor, the front side of the motor is provided with fan shell, the inner wall front side of electric hammer rear shell body is fixedly installed with fan shell, the front side of fan shell is clamped with butt joint plate, the butt joint plate is provided with front and rear through air inlet, the inner chamber of the electric hammer middle shell body is provided with protective shell, the outer wall of the protective shell is provided with sealing groove, the inner side of the sealing groove is clamped with sealing ring, the inner chamber of the electric hammer front shell body is provided with hammer body, the front end of the hammer body is penetrated to the front side of electric hammer front shell body, the outer wall of the hammer body is provided with buffer spring, the top of the electric hammer handle shell body is provided with a plurality of motor heat dissipation holes through its inner chamber, the inner chamber of the electric hammer handle shell body and the inner chamber of the electric hammer rear shell body are mutually through.

[0007] The further improvement of the utility model technical scheme is that: the inner side of fan shell is fixedly installed with heat dissipation fan, the output shaft of motor is fixedly connected with the blade shaft of heat dissipation fan, the output shaft front end of motor is penetrated to the front side of heat dissipation fan and is fixedly installed with driving gear.

[0008] The further improvement in the utility model technical scheme lies in that the outer wall of the driving gear is engaged with a transmission gear one, the front end of the transmission gear one is fixedly installed with a swing bearing, the front end of the swing bearing is fixedly installed with a transmission gear two, the outer wall of the hammer body is fixedly installed with a transmission gear three, and the transmission gear three is engaged with the transmission gear two.

[0009] The further improvement in the utility model technical scheme lies in that the top of the electric hammer middle shell is provided with a plurality of middle shell heat dissipation holes one penetrating the inner cavity thereof, and the left and right sides of the electric hammer middle shell are provided with middle shell heat dissipation holes two penetrating the inner cavity thereof.

[0010] The further improvement in the utility model technical scheme lies in that the top of the electric hammer front shell is provided with a plurality of front shell heat dissipation holes penetrating the inner cavity thereof.

[0011] Due to the adoption of the above technical scheme, the utility model has the following technical progress compared with the prior art:

[0012] 1. The utility model provides a heat dissipation structure of electric hammer, through the cooperation between air inlet hole, fan shell, heat dissipation fan, middle shell heat dissipation hole one and middle shell heat dissipation hole two, so that the motor of electric hammer can not only drive the hammer body, but also can drive the heat dissipation fan to rotate at high speed at the same time when starting, the external air is rapidly guided into the rear shell body of electric hammer, and the heat generated by the motor is rapidly discharged through the motor heat dissipation hole, the heat dissipation efficiency of the motor of electric hammer is improved, and the service life of the internal electronic elements of electric hammer is guaranteed.

[0013] 2. The utility model provides a heat dissipation structure of electric hammer, through the cooperation between protection shell, sealing groove and sealing ring, so that the driving gear and transmission gear one of transmission core part can be sealed and protected, and the sealing property is improved with the help of the sealing ring, so that the dust contained in the air passing through the middle shell of electric hammer prevents the engagement stability of the driving gear and transmission gear one. ACCURATE DRAWINGS

[0014] Figure 1 It is the overall schematic view of the utility model structure;

[0015] Figure 2 It is the internal schematic view of the shell of the utility model structure;

[0016] Figure 3 It is the internal schematic view of the protection shell of the utility model structure;

[0017] Figure 4 It is the schematic view of the electric hammer middle shell and electric hammer front shell of the utility model structure.

[0018] In the figure: 1, the rear shell of the electric hammer; 11, the motor; 111, the driving gear; 12, the fan shell; 121, the cooling fan; 13, the docking plate; 131, the air inlet hole; 2, the middle shell of the electric hammer; 21, the protective shell; 211, the sealing groove; 212, the sealing ring; 22, the transmission gear one; 23, the swing bearing; 24, the transmission gear two; 25, the middle shell cooling hole one; 26, the middle shell cooling hole two; 3, the front shell of the electric hammer; 31, the hammer body; 311, the transmission gear three; 32, the buffer spring; 33, the front shell cooling hole; 4, the handle shell of the electric hammer; 41, the motor cooling hole. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, purposes and effects of the utility model easy to understand, the utility model is further described below in combination with specific embodiments.

[0020] As shown in Figure 1 , Figure 2 , the utility model provides a heat dissipation structure of electric hammer, including electric hammer rear shell 1, the front side of electric hammer rear shell 1 is connected with electric hammer middle shell 2, the front side of electric hammer middle shell 2 is connected with electric hammer front shell 3, the rear side of electric hammer rear shell 1 is provided with electric hammer handle shell 4, the inner chamber of electric hammer rear shell 1 is provided with motor 11, the front side of motor 11 is provided with fan shell 12, fan shell 12 is fixedly installed at the inner wall front side of electric hammer rear shell 1, the front side of fan shell 12 is connected with docking plate 13, docking plate 13 is provided with air inlet hole 131 that penetrates front and back, the inner chamber of electric hammer middle shell 2 is provided with protective shell 21, the outer wall of protective shell 21 is provided with sealing groove 211, the inner side of sealing groove 211 is connected with sealing ring 212, the inner chamber of electric hammer front shell 3 is provided with hammer body 31, the front end of hammer body 31 penetrates to the front side of electric hammer front shell 3, the outer wall of hammer body 31 is provided with buffer spring 32, the top of electric hammer handle shell 4 is provided with a plurality of motor cooling hole 41 that penetrates its inner chamber, the inner chamber of electric hammer handle shell 4 and the inner chamber of electric hammer rear shell 1 are mutually penetrated;

[0021] Driving gear 111 and transmission gear one 22 and other core driving components can be protected by protective shell 21, and the sealing property of protective shell 21 is improved by sealing ring 212 in sealing groove 211, dust is prevented from entering protective shell 21 and affecting the transmission effect of driving gear 111 and transmission gear one 22, and the overall hammer body 31 can provide buffering by buffer spring 32 when working, preventing a large amount of vibration from being transmitted to the shell and causing user's hand to be uncomfortable or affecting the stability of internal components.

[0022] As shown in Figure 3As shown, the inner side of the fan shell 12 is fixedly provided with a cooling fan 121, the output shaft of the motor 11 is fixedly connected with the blade shaft of the cooling fan 121, the front end of the output shaft of the motor 11 penetrates to the front side of the cooling fan 121 and is fixedly provided with a driving gear 111, the outer wall of the driving gear 111 is engaged with a transmission gear one 22, the front end of the transmission gear one 22 is fixedly provided with an oscillating bearing 23, the front end of the oscillating bearing 23 is fixedly provided with a transmission gear two 24, the outer wall of the hammer body 31 is fixedly provided with a transmission gear three 311, and the transmission gear three 311 is engaged with the transmission gear two 24.

[0023] In daily use, the electric hammer can be started by controlling the button to drive the motor 11 to rotate the driving gear 111, and the driving gear 111 is engaged with the transmission gear one 22 to drive the oscillating bearing 23 and the transmission gear two 24 to rotate, and the transmission gear two 24 is engaged with the transmission gear three 311 to drive the hammer body 31 to rotate, and the oscillating bearing 23 can move the hammer body 31 back and forth as a whole, so as to realize the rotating and knocking function. At the same time, the output shaft of the motor 11 can drive the fan blade of the cooling fan 121 in the fan shell 12 to rotate at high speed when the driving gear 111 rotates, so that the external air is sucked into the inner cavity of the electric hammer through the middle shell cooling holes one 25 and then through the air inlet holes 131 of the butt joint plate 13, so as to cool the motor 11, and the heat generated by the motor 11 can also be discharged through the motor cooling holes 41, so as to form air circulation and improve the cooling effect of the motor 11.

[0024] As shown in the figure, Figure 4 The top of the electric hammer middle shell 2 is provided with a plurality of middle shell cooling holes one 25 penetrating the inner cavity, the left and right sides of the electric hammer middle shell 2 are provided with middle shell cooling holes two 26 penetrating the inner cavity, and the top of the electric hammer front shell 3 is provided with a plurality of front shell cooling holes 33 penetrating the inner cavity.

[0025] When the fan blade of the cooling fan 121 rotates at high speed, the external air can be sucked in through the middle shell cooling holes one 25 and the middle shell cooling holes two 26, so as to cool the motor, and the front shell cooling holes 33 provided on the top of the electric hammer front shell 3 can also cool the hammer body 31 to prevent the oscillating bearing 23 or the transmission gear two 24 at the rear end of the hammer body 31 from being too hot.

[0026] Now the working principle of the cooling structure of the electric hammer will be described in detail.

[0027] As shown in the figure, Figures 1-4As shown, the electric hammer can drive the driving gear 111 to rotate by controlling the button to start the motor 11 in daily use, and drive the swing bearing 23 and the transmission gear two 24 to rotate by the meshing of the driving gear 111 and the transmission gear one 22, drive the hammer body 31 to rotate by the meshing of the transmission gear two 24 and the transmission gear three 311, and move the hammer body 31 as a whole back and forth by the swing bearing 23, so as to realize the rotating and knocking effect, and the fan blade of the cooling fan 121 in the fan shell 12 can rotate at high speed when the output shaft of the motor 11 drives the driving gear 111 to rotate, so that the external air is sucked into the inner cavity of the electric hammer middle shell 2 through the middle shell cooling hole one 25 and then through the air inlet hole 131 of the butt joint plate 13, so as to cool the motor 11, and the heat generated by the motor 11 can also be discharged through the motor cooling hole 41, forming air circulation, improving the cooling effect of the motor 11, and the core driving components such as the driving gear 111 and the transmission gear one 22 can be protected by the protection shell 21, and the sealing ring 212 in the sealing groove 211 can improve the sealing property of the protection shell 21, preventing dust from entering the protection shell 21 to affect the transmission effect of the driving gear 111 and the transmission gear one 22, and the overall hammer body 31 can provide buffering by the buffer spring 32 when working, preventing a large amount of vibration from being transmitted to the shell to cause the user's hand to be uncomfortable or affect the stability of the internal components, and the front shell cooling hole 33 opened at the top of the electric hammer front shell 3 can also cool the hammer body 31.

[0028] The above has made a detailed description of the utility model, but some modifications or improvements can be made on the basis of the utility model, which is obvious to those skilled in the art. Therefore, the modifications or improvements without departing from the spirit of the utility model are within the protection scope of the utility model.

Claims

1. A heat dissipation structure of an electric hammer, comprising a rear housing (1) of the electric hammer, characterized in that: The front side of the electric hammer rear shell (1) is clamped with an electric hammer middle shell (2), the front side of the electric hammer middle shell (2) is clamped with an electric hammer front shell (3), the rear side of the electric hammer rear shell (1) is provided with an electric hammer handle shell (4), the inner cavity of the electric hammer rear shell (1) is provided with a motor (11), the front side of the motor (11) is provided with a fan shell (12), the fan shell (12) is fixedly installed on the inner wall of the electric hammer rear shell (1), the front side of the fan shell (12) is clamped with a docking plate (13), the docking plate (13) is provided with an air inlet hole (131) penetrating through the front and rear, the inner cavity of the electric hammer middle shell (2) is provided with a protective shell (21), the outer wall of the protective shell (21) is provided with a sealing groove (211), the inner side of the sealing groove (211) is clamped with a sealing ring (212), the inner cavity of the electric hammer front shell (3) is provided with a hammer body (31), the front end of the hammer body (31) penetrates to the front side of the electric hammer front shell (3), the outer wall of the hammer body (31) is provided with a buffer spring (32), the top of the electric hammer handle shell (4) is provided with a plurality of motor heat dissipation holes (41) penetrating through the inner cavity, and the inner cavity of the electric hammer handle shell (4) and the inner cavity of the electric hammer rear shell (1) are interconnected.

2. The heat dissipation structure of an electric hammer according to claim 1, wherein: The inner side of the fan shell (12) is fixedly installed with a heat dissipation fan (121), the output shaft of the motor (11) is fixedly connected with the blade shaft of the heat dissipation fan (121), and the output shaft of the motor (11) penetrates to the front side of the heat dissipation fan (121) and is fixedly installed with a driving gear (111).

3. The heat dissipation structure of the electric hammer according to claim 2, wherein: The outer wall of the driving gear (111) is engaged with a transmission gear one (22), the front end of the transmission gear one (22) is fixedly installed with a swing bearing (23), the front end of the swing bearing (23) is fixedly installed with a transmission gear two (24), the outer wall of the hammer body (31) is fixedly installed with a transmission gear three (311), and the transmission gear three (311) is engaged with the transmission gear two (24).

4. The heat dissipation structure of an electric hammer drill according to claim 1, wherein: The top of the electric hammer middle shell (2) is provided with a plurality of middle shell heat dissipation holes one (25) penetrating through the inner cavity, and the left and right sides of the electric hammer middle shell (2) are provided with middle shell heat dissipation holes two (26) penetrating through the inner cavity.

5. The heat dissipation structure of an electric hammer drill according to claim 1, wherein: The top of the electric hammer front shell (3) is provided with a plurality of front shell heat dissipation holes (33) penetrating through the inner cavity.

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