External carbon brush structure of electric hammer

Abstract

The external carbon brush structure of the electric hammer relates to the technical field of electric tools and comprises an electric hammer body and a protective shell, the electric hammer body is fixedly installed inside the protective shell, a motor is arranged at one end of the electric hammer body, a shell fixing frame is fixedly installed on the inner wall of the protective shell, and butt joint assemblies are arranged on the two sides of the shell fixing frame. The butt joint assembly comprises a sleeve, a connecting cylinder and a fixing cylinder, a spring groove is formed in the inner wall of the connecting cylinder, a sliding groove is formed in the inner wall of the fixing cylinder, and a carbon brush is arranged in the sliding groove; through mutual cooperation of the electric hammer body, the protective shell, the motor, the shell fixing frame, the connecting plate, the butt joint assembly and the cap, after a worker rotates the cap, the cap can be directly taken down, meanwhile, the compression spring releases pressure, the worker can directly pour the carbon brush out of the sleeve and can also manually take out the carbon brush, and when a new carbon brush is installed, the worker can conveniently and rapidly install the carbon brush. And the spring grooves and the sliding grooves can limit the carbon brushes, so that the replacement efficiency of the carbon brushes is reduced, and the applicability is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric tool technical field, concretely relates to an external carbon brush structure of electric hammer. BACKGROUND

[0002] Electric hammer is a kind of electric rotary hammer drill with pneumatic hammer mechanism and safety clutch. Electric hammer is used to drill holes in concrete, brick, stone and other hard materials by using the principle of piston movement to compress air and impact the drill bit. Electric hammer is a kind of electric tool with wide application. Electric hammer is based on electric drill, and a piston driven by a crankshaft connecting rod is added to compress air in a cylinder, so that the air pressure in the cylinder changes periodically. The changing air pressure drives the hammer in the cylinder to hit the top of the drill bit repeatedly, which is equivalent to hitting the drill bit with a hammer. Therefore, it is called electric hammer. The motor used in electric hammer is mostly a brush motor, which needs to be replaced or repaired after long-term use.

[0003] The external carbon brush structure of the electric hammer in the prior art is mostly arranged inside the protective shell of the electric hammer. When the carbon brush is taken out, the shell needs to be disassembled to gradually take out and replace the carbon brush. The assembly and disassembly method is complex, which affects the replacement efficiency of the carbon brush and has poor applicability. At the same time, the locking structure is mostly locked by screws or bolts. When the lock is turned, a tool needs to be used, which is not convenient for manual operation and has great limitations. UTILITY MODEL CONTENTS

[0004] In view of the deficiencies of the prior art, the utility model provides an external carbon brush structure of electric hammer to overcome the above technical problems existing in the prior art.

[0005] An external carbon brush structure of electric hammer, comprising an electric hammer body and a protective shell, the electric hammer body is fixedly installed inside the protective shell, and one end is provided with a motor, the inner wall of the protective shell is fixedly installed with a shell fixing frame, both sides of the shell fixing frame are provided with a butt joint assembly, the butt joint assembly comprises a sleeve, a connecting cylinder and a fixed cylinder, the inner wall of the connecting cylinder is provided with a spring groove, the inner wall of the fixed cylinder is provided with a sliding groove, the sliding groove is provided with a carbon brush, one end of the carbon brush is fixedly installed with a compression spring, and one end is provided with a limiting assembly, the limiting assembly comprises a cap and a fixed disc, the cap is threadedly connected with the inner wall of the sleeve, the fixed disc is fixedly installed at one end of the cap, and one end is fixedly installed with a handle.

[0006] Preferably, the installation end of the motor is fixedly installed inside the shell fixing frame.

[0007] Preferably, the outer wall of the shell fixing frame is fixedly provided with a plurality of connecting plates and two reinforcing plates, and a fixed handle is fixedly arranged at one end of the shell fixing frame.

[0008] Preferably, the compression spring is arranged in the spring groove, one end of the carbon brush abuts against the cap, and the carbon brush is in sliding fit with the inner wall of the sliding groove.

[0009] Preferably, the connecting barrel is fixedly provided with a fixed block at one end, and the fixed block is fixedly connected with the shell fixing frame.

[0010] Preferably, the outer wall of the protective shell is fixedly provided with a handle.

[0011] Preferably, one end of the protective shell is provided with a switch.

[0012] Thanks to the above technical scheme, the present application has the following technical progress compared with the prior art:

[0013] 1. The external carbon brush structure of the electric hammer is characterized in that the electric hammer main body, the protective shell, the motor, the shell fixing frame, the connecting plate, the butt joint assembly and the cap are in mutual cooperation, after the cap is rotated by a worker, the cap can be directly taken off, the compression spring releases pressure, the worker can directly pour out the carbon brush from the sleeve, the carbon brush can also be manually taken out, the spring groove and the sliding groove can limit the carbon brush when a new carbon brush is installed, the replacement efficiency of the carbon brush is reduced, and the applicability is high.

[0014] 2. The external carbon brush structure of the electric hammer is characterized in that the handle, the fixed disc, the cap, the sleeve, the carbon brush and the protective shell are in mutual cooperation, the worker can directly rotate the handle and the cap by hand, other tools are not needed, the operation difficulty is further reduced, and the applicability is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic view of the three-dimensional structure of the present application;

[0016] Figure 2 It is a sectional view of the local structure of the present application;

[0017] Figure 3 It is Figure 2 It is an enlarged schematic view of part A of the present application;

[0018] Figure 4 It is a schematic view of the three-dimensional structure of the butt joint assembly in the present application;

[0019] Figure 5 It is a sectional view of the butt joint assembly in the present application.

[0020] Fig.:

[0021] 1, electric hammer body; 2, protective shell; 200, motor; 201, shell fixing frame; 202, fixed handle; 203, connecting plate; 204, reinforcing plate; 3, docking assembly; 301, sleeve; 302, connecting cylinder; 303, fixed cylinder; 304, spring groove; 305, sliding groove; 306, fixed block; 4, limiting assembly; 401, cap; 402, fixed disc; 403, handle; 5, carbon brush; 501, compression spring; 6, handle; 7, switch. DETAILED DESCRIPTION

[0022] 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:

[0023] As Figures 1-5 shown, the utility model provides an external carbon brush structure of electric hammer, including electric hammer body 1 and protective shell 2, electric hammer body 1 is fixedly installed in the inside of protective shell 2, and one end is provided with motor 200, the inner wall of protective shell 2 is fixedly installed with shell fixing frame 201, both sides of shell fixing frame 201 are provided with docking assembly 3, docking assembly 3 includes sleeve 301, connecting cylinder 302 and fixed cylinder 303, the inner wall of connecting cylinder 302 is opened with spring groove 304, the inner wall of fixed cylinder 303 is opened with sliding groove 305, sliding groove 305 is provided with carbon brush 5 in, one end of carbon brush 5 is fixedly installed with compression spring 501, and one end is provided with limiting assembly 4, limiting assembly 4 includes cap 401 and fixed disc 402, cap 401 is connected with the inner wall of sleeve 301 with screw thread, fixed disc 402 is fixedly installed at one end of cap 401, and one end is fixedly installed with handle 403, the installation end of motor 200 is fixedly installed in the inside of shell fixing frame 201, the outer wall of shell fixing frame 201 is fixedly installed with several connecting plates 203 and two reinforcing plates 204, and one end is fixedly installed with fixed handle 202, several connecting plates 203 and reinforcing plates 204 are fixedly connected with two sleeve 301 respectively, compression spring 501 is arranged in spring groove 304, one end of carbon brush 5 is in abutment with cap 401, carbon brush 5 and the inner wall of sliding groove 305 are in sliding fit, one end of connecting cylinder 302 is fixedly installed with fixed block 306, fixed block 306 is fixedly connected with shell fixing frame 201.

[0024] When the carbon brush is damaged or needs to be replaced after long time use, first, the electric hammer body 1 and the motor 200 are closed, then the handle 403 is rotated, the handle 403 drives the fixed disc 402 and the cap 401 to rotate, the cap 401 is threadedly connected with the sleeve 301 and slides in the sleeve 301, the cap 401 falls off from the sleeve 301 after moving a distance, at this time, the cap 401 no longer presses the compression spring 501, at this time, the compression spring 501 releases the pressure, then the worker takes out the carbon brush 5 from the fixed cylinder 303 by grabbing one end of the carbon brush 5 or tilting the device, the carbon brush 5 slides in the sliding groove 305 and the spring groove 304 in sequence, and falls off from the sleeve 301, by setting the limiting assembly 4 outside the protective shell 2, the operation difficulty is reduced, the installation and dismounting efficiency of the carbon brush 5 is effectively improved, the carbon brush 5 is convenient to replace, and the applicability is high.

[0025] Meanwhile, by setting the cap 401 in threaded connection with the sleeve 301, the difficulty of dismounting and mounting is further reduced, the handle 403 can also reduce the difficulty of rotating the cap 401, and the applicability is further improved.

[0026] As shown in Figure 1 In one embodiment, the outer wall of the protective shell 2 is fixedly provided with a handle 6, and one end of the protective shell 2 is provided with a switch 7.

[0027] The handle 6 can be conveniently held by the user, and the applicability is high, and the switch 7 is used to start and stop the electric hammer body 1.

[0028] The carbon brush 5 is a prior art, which is not described here.

[0029] The working principle of the external carbon brush structure of the electric hammer will be described below.

[0030] When the carbon brush is damaged or needs to be replaced after long time use, first, the electric hammer body 1 and the motor 200 are closed, then the handle 403 is rotated, the handle 403 drives the fixed disc 402 and the cap 401 to rotate, the cap 401 is threadedly connected with the sleeve 301 and slides in the sleeve 301, the cap 401 falls off from the sleeve 301 after moving a distance, at this time, the cap 401 no longer presses the compression spring 501, at this time, the compression spring 501 releases the pressure, then the worker takes out the carbon brush 5 from the fixed cylinder 303 by grabbing one end of the carbon brush 5 or tilting the device, the carbon brush 5 slides in the sliding groove 305 and the spring groove 304 in sequence, and falls off from the sleeve 301, by setting the limiting assembly 4 outside the protective shell 2, the operation difficulty is reduced, the installation and dismounting efficiency of the carbon brush 5 is effectively improved, the carbon brush 5 is convenient to replace, and the applicability is high.

[0031] Meanwhile, the cap 401 is screwed with the sleeve 301, which further reduces the difficulty of dismounting and mounting, and the handle 403 can also reduce the difficulty of rotating the cap 401, and further improves the applicability.

[0032] The utility model has been described in detail above, 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, without departing from the spirit of the utility model, the modifications or improvements are within the scope of the utility model.

Claims

1. An external carbon brush structure of an electric hammer, comprising an electric hammer body (1) and a protective shell (2), characterized in that: The electric hammer body (1) is fixedly installed in the inside of the protective shell (2), and is provided with a motor (200) at one end, the inner wall of the protective shell (2) is fixedly installed with a shell fixing frame (201), both sides of the shell fixing frame (201) are provided with a butt joint assembly (3), the butt joint assembly (3) comprises a sleeve (301), a connecting barrel (302) and a fixing barrel (303), the inner wall of the connecting barrel (302) is provided with a spring groove (304), the inner wall of the fixing barrel (303) is provided with a sliding groove (305), the sliding groove (305) is provided with a carbon brush (5), one end of the carbon brush (5) is fixedly installed with a compression spring (501), and one end is provided with a limiting assembly (4), the limiting assembly (4) comprises a cap (401) and a fixed disc (402), the cap (401) is screwed with the inner wall of the sleeve (301), the fixed disc (402) is fixedly installed at one end of the cap (401), and one end is fixedly installed with a handle (403).

2. The external carbon brush structure of an electric hammer according to claim 1, characterized in that: The mounting end of the motor (200) is fixedly installed in the inside of the shell fixing frame (201).

3. The external carbon brush structure of an electric hammer according to claim 1, characterized in that: The outer wall of the shell fixing frame (201) is fixedly installed with a plurality of connecting plates (203) and two reinforcing plates (204), and is fixedly installed with a fixed handle (202) at one end, a plurality of the connecting plates (203) and the reinforcing plates (204) are respectively fixedly connected with two sleeve (301).

4. The external carbon brush structure of an electric hammer according to claim 1, characterized in that: The compression spring (501) is arranged in the spring groove (304), one end of the carbon brush (5) abuts against the cap (401), and the carbon brush (5) is in sliding fit with the inner wall of the sliding groove (305).

5. The external carbon brush structure of an electric hammer according to claim 1, wherein: One end of the connecting barrel (302) is fixedly installed with a fixed block (306), and the fixed block (306) is fixedly connected with the shell fixing frame (201).

6. The external carbon brush structure of an electric hammer according to claim 1, characterized in that: The outer wall of the protective shell (2) is fixedly installed with a handle (6).

7. The external carbon brush structure of an electric hammer according to claim 1, characterized in that: One end of the protective shell (2) is provided with a switch (7).

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