Direct-current brushless multifunctional electric hammer gear shifting structure

Abstract

The utility model discloses a direct current brushless multifunctional electric hammer gear shifting structure, and particularly relates to the technical field of electric hammers, the gear shifting structure is installed on a direct current brushless electric hammer and comprises a rotary gear shifting switch, the outer wall of the rotary gear shifting switch is fixedly sleeved with an installation ring, the top end of the installation ring is provided with an annular groove, a fixing ring is arranged in the annular groove, and the fixing ring is connected with the rotary gear shifting switch. The fixing ring is arranged at the top of the rotary gear shifting switch, the two rubber limiting rings are fixedly arranged at the bottom end of the fixing ring, the two annular limiting grooves are formed in the top end of the rotary gear shifting switch, and the two rubber limiting rings are arranged in the two annular limiting grooves correspondingly and used for improving the stability of the rotary gear shifting switch. According to the direct-current brushless electric hammer, the gears of the direct-current brushless electric hammer are adjusted through the rotary gear shifting switch, the fixed ring is disassembled, the rotary gear shifting switch can be disassembled to be overhauled and replaced, when the direct-current brushless electric hammer is reinstalled, only the rotary gear shifting switch and the fixed ring need to be sequentially installed in the installation ring, the structure is simple, and the direct-current brushless electric hammer is very convenient to install and disassemble.

Description

Technical Field

[0001] The utility model relates to the technical field of electric hammers, and more specifically to a DC brushless multi-functional electric hammer shift structure. Background Art

[0002] A DC brushless electric hammer is a power tool that combines multiple functions such as an electric drill, an electric hammer, and a screwdriver. It uses a DC motor and has no brush design, thereby reducing wear and maintenance, improving efficiency and service life. This tool is commonly used in fields such as construction, decoration, and machining, and can perform operations such as drilling, hammering, and tightening screws. When the existing electric hammer is in use, in order to meet various working conditions, a shift structure is provided on the electric hammer to adjust the gear of the electric hammer.

[0003] For example, the electric hammer shift mechanism with the publication number CN214213680U in the prior art realizes the switching of multiple functions through one machine and one button, which is stable, reliable, has a long service life, is simple to manufacture, and improves the cost performance of the electric hammer; at the same time, it reduces the risk of the clutch paddle getting stuck or falling off during shifting.

[0004] However, the above-mentioned prior art still has the following problems when in use: The existing electric hammer shift structure is usually integrated with the electric hammer housing. When the shift structure is damaged after long-term use, it is not convenient to disassemble and repair. Based on this, the utility model provides a DC brushless electric hammer shift structure that is convenient for disassembly and assembly, facilitating users to perform maintenance and replacement. Summary of the Utility Model

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a DC brushless multi-functional electric hammer shift structure. By rotating the shift switch, the gear of the DC brushless electric hammer can be adjusted. And by removing the fixing ring, the shift switch can be removed for maintenance and replacement. When reinstalling, only need to install the shift switch and the fixing ring into the installation ring in sequence. The structure is simple, and the installation and disassembly are very convenient, so as to solve the problems in the above-mentioned background art.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A DC brushless multi-functional electric hammer shift structure is installed on a DC brushless electric hammer, including a shift switch. An installation ring is fixedly sleeved on the outer wall of the shift switch. An annular groove is opened at the top of the installation ring. A fixing ring is arranged in the annular groove. The fixing ring is arranged on the top of the shift switch. Two rubber limiting rings are fixedly arranged at the bottom end of the fixing ring. Two annular limiting grooves are opened at the top end of the shift switch. The two rubber limiting rings are respectively arranged in the two annular limiting grooves to improve the stability of the shift switch. A dust cover for sealing the installation ring is hinged at the top end of the installation ring. An annular rubber pad is inserted at the top end of the fixing ring.

[0007] In a preferred embodiment, a plurality of positioning blocks are fixedly provided on the inner wall of the mounting ring, and a plurality of positioning grooves are formed on the outer wall surface of the rotary shift switch. The plurality of positioning blocks are respectively arranged in the plurality of positioning grooves. Through the cooperation of the positioning blocks and the positioning grooves, the stability of the rotary shift switch is improved.

[0008] In a preferred embodiment, an annular embedding groove is formed at the top end of the fixing ring, and a plurality of mounting holes are formed at the top of the annular embedding groove. The plurality of mounting holes are annularly and arrayedly distributed on the annular embedding groove to improve the firmness between the rotary shift switch and the mounting ring.

[0009] In a preferred embodiment, a plurality of clamping blocks are fixedly provided at the bottom end of the annular rubber pad. The plurality of clamping blocks and the plurality of mounting holes are spaced apart. A plurality of clamping grooves are formed at the top of the annular embedding groove. The plurality of clamping blocks are respectively inserted into the plurality of clamping grooves. Through the clamping connection of the clamping blocks and the clamping grooves, the firmness of the annular rubber pad can be improved.

[0010] In a preferred embodiment, a plurality of arc-shaped iron sheets are provided at the bottom end of the dust-proof cover, and a plurality of arc-shaped magnets are provided at the top end of the mounting ring. The plurality of arc-shaped iron sheets are respectively magnetically attracted to the plurality of arc-shaped magnets. Through the magnetic attraction of the plurality of arc-shaped iron sheets and the plurality of arc-shaped magnets, the firmness between the dust-proof cover and the mounting ring can be improved.

[0011] In a preferred embodiment, a plurality of first arc-shaped grooves are formed on the outer wall at the top end of the mounting ring, and a plurality of second arc-shaped grooves are formed on the outer wall at the bottom end of the dust-proof cover. The plurality of second arc-shaped grooves correspond to the plurality of first arc-shaped grooves one by one. The plurality of arc-shaped magnets are respectively fixed in the plurality of first arc-shaped grooves, and the plurality of arc-shaped iron sheets are respectively fixed in the plurality of second arc-shaped grooves for accommodating the arc-shaped magnets and the arc-shaped iron sheets.

[0012] The technical effects and advantages of the present utility model:

[0013] 1. The present utility model adjusts the gear of the DC brushless electric hammer through the rotary shift switch, and by disassembling the fixing ring, the rotary shift switch can be removed for maintenance and replacement. When reinstalling, it is only necessary to install the rotary shift switch and the fixing ring into the mounting ring in sequence. The structure is simple, and the installation and disassembly are very convenient.

[0014] 2. Through the magnetic attraction of the arc-shaped iron sheets and the arc-shaped magnets, the firmness between the dust-proof cover and the mounting ring can be improved. With the help of the dust-proof cover to seal the mounting ring, dust and debris can be prevented from contaminating the rotary shift switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0016] Figure 2 It is a sectional view of the mounting ring and the fixing ring of the present utility model;

[0017] Figure 3 Structural diagram of the fixing ring and the annular rubber pad of the present utility model;

[0018] Figure 4 Top view of the mounting ring of the present utility model;

[0019] Figure 5 Installation schematic diagram of the present utility model on a DC brushless electric hammer.

[0020] Reference numerals are: 1, rotary shift switch; 2, mounting ring; 3, annular groove; 4, fixing ring; 5, rubber limit ring; 6, annular limit groove; 7, dust cover; 8, annular rubber pad; 9, positioning block; 10, positioning groove; 11, annular embedding groove; 12, mounting hole; 13, clamping block; 14, clamping groove; 15, arc-shaped iron sheet; 16, arc-shaped magnet; 17, first arc-shaped groove; 18, second arc-shaped groove. Specific implementation manner

[0021] Next, with reference to the accompanying drawings in the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] Refer to the attached drawings of the specification Figures 1-5 The present utility model provides a DC brushless multi-functional electric hammer shift structure, which is installed on a DC brushless electric hammer and includes a rotary shift switch 1. Specifically, the rotary shift switch 1 is connected to the internal circuit of the DC brushless electric hammer through a wire. The rotary shift switch 1 switches the internal circuit connection state by rotating a handle or a knob, so as to realize the selection or switching of different functions. An installation ring 2 is fixedly sleeved on the outer wall of the rotary shift switch 1;

[0023] Then, an annular groove 3 is opened at the top of the installation ring 2. A fixing ring 4 is arranged in the annular groove 3. The fixing ring 4 is arranged on the top of the rotary shift switch 1. Two rubber limit rings 5 are fixedly arranged at the bottom end of the fixing ring 4. Two annular limit grooves 6 are opened at the top end of the rotary shift switch 1. The two rubber limit rings 5 are respectively arranged in the two annular limit grooves 6 to improve the stability of the rotary shift switch 1. A dust cover 7 for sealing the installation ring 2 is hinged at the top end of the installation ring 2. An annular rubber pad 8 is inserted into the top end of the fixing ring 4.

[0024] In use, the user flips open the dust-proof cover 7 and can use the rotary shift switch 1 to adjust the gear of the DC brushless electric hammer. After adjustment, the dust-proof cover 7 is closed again to avoid dust and debris from contaminating the rotary shift switch 1. After long-term use, the user only needs to loosen a plurality of bolts to remove the fixing ring 4 and the rotary shift switch 1 from the mounting ring 2 for maintenance and replacement of the rotary shift switch 1. When reinstalling, only the rotary shift switch 1 and the fixing ring 4 need to be installed into the mounting ring 2 in sequence. The structure is simple and the installation and disassembly are very convenient.

[0025] Refer to the attached instructions Figures 1-5 On the inner wall of the mounting ring 2, a plurality of positioning blocks 9 are fixedly provided. On the outer wall surface of the rotary shift switch 1, a plurality of positioning grooves 10 are formed. The plurality of positioning blocks 9 are respectively arranged in the plurality of positioning grooves 10. Through the cooperation of the positioning blocks 9 and the positioning grooves 10, the stability of the rotary shift switch 1 is improved.

[0026] At the bottom end of the annular rubber pad 8, a plurality of clamping blocks 13 are fixedly provided. The plurality of clamping blocks 13 and the plurality of mounting holes 12 are distributed at intervals. On the top of the annular groove 11, a plurality of clamping grooves 14 are formed. The plurality of clamping blocks 13 are respectively inserted into the plurality of clamping grooves 14. Through the clamping connection of the clamping blocks 13 and the clamping grooves 14, the firmness of the annular rubber pad 8 can be improved.

[0027] Moreover, at the bottom end of the dust-proof cover 7, a plurality of arc-shaped iron sheets 15 are provided. At the top end of the mounting ring 2, a plurality of arc-shaped magnets 16 are provided. The plurality of arc-shaped iron sheets 15 are respectively magnetically attracted to the plurality of arc-shaped magnets 16. Through the magnetic attraction of the plurality of arc-shaped iron sheets 15 and the plurality of arc-shaped magnets 16, the firmness between the dust-proof cover 7 and the mounting ring 2 can be improved.

[0028] Furthermore, on the outer wall of the top end of the mounting ring 2, a plurality of first arc-shaped grooves 17 are formed. On the outer wall of the bottom end of the dust-proof cover 7, a plurality of second arc-shaped grooves 18 are formed. The plurality of second arc-shaped grooves 18 correspond to the plurality of first arc-shaped grooves 17 one by one. The plurality of arc-shaped magnets 16 are respectively fixed in the plurality of first arc-shaped grooves 17, and the plurality of arc-shaped iron sheets 15 are respectively fixed in the plurality of second arc-shaped grooves 18 for accommodating the arc-shaped magnets 16 and the arc-shaped iron sheets 15.

[0029] Finally: The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A DC brushless multifunctional electric hammer shifting structure, installed on a DC brushless electric hammer, characterized in that: It comprises a rotary shift switch (1), wherein a mounting ring (2) is provided on an outer wall fixing sleeve of the rotary shift switch (1); The top of the mounting ring (2) is provided with an annular groove (3), a fixing ring (4) is provided in the annular groove (3), the fixing ring (4) is arranged on the top of the rotary shift switch (1), two rubber limit rings (5) are fixedly provided on the bottom of the fixing ring (4), the top of the rotary shift switch (1) is provided with two annular limit grooves (6), the two rubber limit rings (5) are respectively arranged in the two annular limit grooves (6), and are used to improve the stability of the rotary shift switch (1); A dust cover (7) for sealing the mounting ring (2) is hingedly connected to the top of the mounting ring (2), and an annular rubber pad (8) is inserted into the top of the fixing ring (4).

2. A DC brushless multifunctional electric hammer shifting structure according to claim 1, characterized in that: A plurality of positioning blocks (9) are fixedly provided on the inner wall of the mounting ring (2), a plurality of positioning grooves (10) are provided on the outer wall surface of the rotary shift switch (1), and the plurality of positioning blocks (9) are respectively arranged in the plurality of positioning grooves (10).

3. A DC brushless multifunctional hammer shifting structure according to claim 1, characterized in that: The top of the fixing ring (4) is provided with an annular embedding groove (11), the top of the annular embedding groove (11) is provided with a plurality of mounting holes (12), and the plurality of mounting holes (12) are distributed in an annular array on the annular embedding groove (11).

4. A DC brushless multifunctional hammer shifting structure according to claim 3, characterized in that: A plurality of clamping blocks (13) are fixedly provided at the bottom end of the annular rubber pad (8), the plurality of clamping blocks (13) are spaced apart from the plurality of mounting holes (12), a plurality of clamping grooves (14) are provided at the top of the annular embedding groove (11), and the plurality of clamping blocks (13) are respectively inserted into the plurality of clamping grooves (14).

5. A DC brushless multifunctional electric hammer shifting structure according to claim 1, characterized in that: A plurality of arc-shaped iron sheets (15) are provided at the bottom end of the dust cover (7), and a plurality of arc-shaped magnets (16) are provided at the top end of the mounting ring (2). The plurality of arc-shaped iron sheets (15) are magnetically attracted to the plurality of arc-shaped magnets (16) respectively.

6. A DC brushless multifunctional electric hammer shifting structure according to claim 5, characterized in that: The outer wall at the top end of the mounting ring (2) is provided with a plurality of first arc-shaped grooves (17), the outer wall at the bottom end of the dust cover (7) is provided with a plurality of second arc-shaped grooves (18), the plurality of second arc-shaped grooves (18) correspond to the plurality of first arc-shaped grooves (17) one by one, the plurality of arc-shaped magnets (16) are respectively fixed in the plurality of first arc-shaped grooves (17), and the plurality of arc-shaped iron sheets (15) are respectively fixed in the plurality of second arc-shaped grooves (18).

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