Electric drill
By designing a detachable rear cover and multiple air outlets, the problem of difficulty in dismantling the existing electric drill case is solved, and the convenience of fan cleaning and motor rotor replacement is achieved.
Patent Information
- Application Number
- CN202421819057.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-07-30
AI Technical Summary
The existing electric drill rig has a complex structure and is difficult to disassemble, which leads to inconvenient cleaning of fan dust and replacement of motor rotors.
A casing structure including a motor case, a transmission case and a rear cover are designed. The rear cover is removable, surrounds the fan, and multiple air outlets are provided to improve the heat dissipation effect.
It realizes the convenience of fan dust cleaning and motor rotor replacement, simplifies the disassembly and installation process of electric drills, and avoids the problem of poor installation.
Smart Images
Figure CN222890596U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of electric tools, and in particular to an electric drill. Background Art
[0002] The casing of the electric drill currently on the market generally adopts a half structure, that is, it is composed of two half shells on the left and right. Therefore, when the fan in the casing needs to be cleaned or the motor rotor needs to be replaced, the whole machine must be disassembled to complete the task. However, disassembly of the whole machine is very troublesome, and what is worse is that technical problems such as poor installation are prone to occur during reinstallation. Therefore, it is necessary to improve this casing to facilitate cleaning of dust accumulated on the fan and replacement of the motor rotor. Utility Model Content
[0003] The utility model provides an electric drill which is convenient for cleaning dust accumulation on a fan and replacing a motor rotor.
[0004] The electric drill includes a casing, a motor and a transmission mechanism, the casing includes a motor casing, a transmission casing and a back cover, the motor casing is located between the transmission casing and the back cover, the motor casing and the transmission casing form an inner cavity, the inner cavity is used to accommodate the motor and the transmission mechanism, a fan is installed behind the motor, the fan is completely exposed outside the inner cavity, the back cover has an integrally formed end wall and a peripheral side wall, the peripheral side wall extends around the end wall, the back cover can be detachably mounted to the motor casing, the peripheral side wall of the back cover surrounds the fan, and the peripheral side wall is provided with an air outlet corresponding to the fan.
[0005] Furthermore, the motor includes a stator, a rotor and a drive shaft, the rotor is installed on the drive shaft of the motor, the drive shaft drives the rotor to rotate, the stator is sleeved on the outer circumference of the rotor, the end wall of the rear cover has a mounting seat, one end of the drive shaft of the motor is installed to the mounting seat through a bearing, and the rotor can be taken out from the inner cavity.
[0006] Further, the fan is mounted to the drive shaft of the motor and is located behind the stator and the rotor.
[0007] Furthermore, there are multiple air outlets, and the multiple air outlets surround the fan.
[0008] Furthermore, the air outlets are arranged on the top and on both left and right sides of the peripheral side wall.
[0009] Furthermore, the rear cover is mounted on the motor housing by screws.
[0010] Furthermore, the rear cover is mounted on the motor housing by snap-fitting.
[0011] Beneficial effects: The housing of the electric drill comprises a motor housing, a transmission housing and a rear cover, the motor is contained in the motor housing, the fan is installed behind the motor and is completely exposed from the motor housing, and the rear cover can surround and cover the fan. The rear cover is detachably connected to the motor housing, so it is convenient to remove the rear cover, expose the fan, and then clean the fan and replace the rotor of the motor. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of an electric drill in an embodiment of the utility model.
[0013] Figure 2 It is an exploded schematic diagram of an electric drill in an embodiment of the utility model.
[0014] Figure 3 It is a schematic diagram of the electric drill and the back cover being separated in the embodiment of the utility model. DETAILED DESCRIPTION
[0015] Here, exemplary embodiments will be described in detail, and examples thereof are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application.
[0016] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this utility model belongs. The "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one" or "one" do not indicate quantity restrictions, but indicate that there is at least one. "Multiple" or "several" means two and more than two. Unless otherwise specified, similar words such as "front", "rear", "lower" and / or "upper" are only for convenience of explanation and are not limited to one position or one spatial orientation. Similar words such as "include" or "include" mean that the elements or objects appearing in front of "include" or "include" include the elements or objects listed after "include" or "include" and their equivalents, and do not exclude other elements or objects. Similar words such as "connect" or "connected" are not limited to physical or mechanical connections, and can include electrical connections, whether direct or indirect. The singular forms "a", "said" and "the" used in this specification and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.
[0017] like Figure 1 As shown, this embodiment relates to an electric drill 100, which includes a housing 1, a motor 2 and a transmission mechanism 4. The housing 1 includes a motor housing 11, a transmission housing 12 and a rear cover 13, wherein the motor housing 11 is located between the transmission housing 12 and the rear cover 13, and the motor housing 11 and the transmission housing 12 form an inner cavity, which is used to accommodate the motor 2 and the transmission mechanism 4. Specifically, the motor housing 11 accommodates the motor 2, and the transmission housing 12 accommodates the transmission mechanism 4.
[0018] In this embodiment, combined with Figure 2 and 3 As shown, the motor housing 1 includes a left half housing 111 and a right half housing 112. The left half housing 111 and the right half housing 112 are assembled and fastened to form the motor housing 1 for accommodating the motor 2. A fan 3 is installed behind the motor 2, and the fan 3 is completely exposed outside the motor housing 1.
[0019] The rear cover 13 is detachably mounted to the motor housing 1. In this embodiment, the rear cover 13 is mounted to the left half shell 111 and the right half shell 112 respectively. The rear cover 13 has an integrally formed end wall 131 and a peripheral side wall 132. The end wall 131 of the rear cover 13 is used to close the opening of the inner cavity, and the peripheral side wall 132 of the rear cover 13 is formed by extending axially from the edge of the end wall 131. The peripheral side wall 132 of the rear cover 13 surrounds the fan 3.
[0020] The housing 1 of the electric drill 100 is formed by assembling a motor housing 11, a transmission housing 12 and a rear cover 13, and the rear cover 13 is detachably connected to the motor housing 11. Therefore, when it is necessary to clean the fan 3 and replace the rotor 22 of the motor 2, it is only necessary to remove the rear cover 13 from the left and right half shells 111 and 112 of the motor housing 11, and the fan 3 is exposed outside the inner cavity, so that the fan 3 can be cleaned very conveniently.
[0021] Combination Figure 2 As shown, the motor 2 includes a stator 21, a rotor 22 and a drive shaft 23. The rotor 22 is mounted on the drive shaft 23 of the motor 2. The drive shaft 23 drives the rotor 22 to rotate. The stator 21 is sleeved on the outer periphery of the rotor 22. The fan 3 is mounted on the drive shaft 23 of the motor 2 and is located behind the stator 21 and the rotor 22. The rear is the side close to the rear cover 13.
[0022] The end wall 131 of the rear cover 13 has a mounting seat, and one end of the driving shaft 23 of the motor 2 is mounted to the mounting seat through a bearing. Therefore, after the rear cover 13 is removed from the left and right half shells 111 and 112 of the motor housing 11, the rotor 22 can be taken out from the inner cavity for replacement, making it very convenient to repair the electric drill 100.
[0023] In order to improve the heat dissipation effect, combined Figure 3 As shown, a plurality of air outlets 133 are provided on the peripheral side wall 132 of the rear cover 13. The air outlets 133 surround the fan 3. In this embodiment, grid-shaped air outlets 133 are provided above and on both sides of the peripheral side wall 132. When the fan 3 is working, the external air is sucked into the inner cavity from the air outlet 133 to dissipate the heat of the motor 2.
[0024] In this embodiment, if Figure 2 As shown, the rear cover 13 is installed on the left half shell 111 and the right half shell 112 by screws. Therefore, when the rear cover 13 needs to be removed or installed, it is only necessary to loosen or tighten the screws. The removal and installation of the rear cover 13 is very convenient and simple, and there will be no problem of difficult removal and poor installation.
[0025] In other alternative embodiments, the back cover 13 can also be installed on the left half shell 111 and the right half shell 112 by snapping.
[0026] The above is only a preferred embodiment of the present application and does not constitute any form of limitation to the present application. Although the present application has been disclosed as a preferred embodiment as above, it is not intended to limit the present application. Any technician familiar with the profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present application. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application still falls within the scope of the technical solution of the present application.
Claims
1. An electric drill, characterized in that: The invention comprises a casing, a motor and a transmission mechanism, wherein the casing comprises a motor casing, a transmission casing and a back cover, wherein the motor casing is located between the transmission casing and the back cover, wherein the motor casing and the transmission casing form an inner cavity, wherein the inner cavity is used to accommodate the motor and the transmission mechanism, wherein a fan is installed behind the motor, wherein the fan is completely exposed outside the inner cavity, wherein the back cover comprises an integrally formed end wall and a peripheral side wall, wherein the peripheral side wall extends around the end wall, wherein the back cover is detachably mounted to the motor casing, wherein the peripheral side wall of the back cover surrounds the fan, and wherein the peripheral side wall is provided with an air outlet corresponding to the fan.
2. The electric drill according to claim 1, characterized in that: The motor includes a stator, a rotor and a drive shaft. The rotor is installed on the drive shaft of the motor. The drive shaft drives the rotor to rotate. The stator is sleeved on the outer circumference of the rotor. The end wall of the rear cover has a mounting seat. One end of the drive shaft of the motor is installed to the mounting seat through a bearing. The rotor can be taken out from the inner cavity.
3. The electric drill according to claim 2, characterized in that: The fan is mounted to the drive shaft of the motor and is located behind the stator and the rotor.
4. The electric drill according to claim 1, characterized in that: There are multiple air outlets, and the multiple air outlets surround the fan.
5. The electric drill according to claim 4, characterized in that: The air outlets are arranged on the upper part and the left and right sides of the peripheral side wall.
6. The electric drill according to claim 1, characterized in that: The rear cover is mounted on the motor housing by screws.
7. The electric drill according to claim 1, characterized in that: The rear cover is mounted on the motor housing by snap fastening.