A fixing mechanism for the front end of an electric drill housing

Abstract

A kind of fixing mechanism for the front end of electric drill shell, including electric drill assembly, upper and lower shell and screw for fixing;The outer wall of the electric drill assembly is provided with positioning feature one and positioning feature two;The inner wall of the upper and lower shell is correspondingly provided with positioning matching feature one and positioning matching feature two, the positioning matching feature one is matched with positioning feature one, and the positioning matching feature two is matched with positioning feature two, to realize the positioning between electric drill assembly and upper and lower shell;The screw is provided with upper and lower shell, and upper and lower shell are fixedly connected with electric drill assembly;By adopting buckle type connection to replace traditional screw column connection, the space interference between front end fixing point and speed push button advancing path is completely avoided, the step of tightening screw at front end is saved, when assembling, only need to put assembly into lower shell and press into position, automatic clamping fixing of front end can be realized, operation process is simplified, and production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of electric drill parts technology, and in particular to a fixing mechanism for the front end of an electric drill housing. Background Technology

[0002] As a commonly used handheld power tool, the housing of an electric drill not only protects internal core components such as the motor and gearbox, but also ensures structural stability and operational safety after assembly. The reliability of the front end of the housing directly affects the overall lifespan and user experience of the electric drill, making it a crucial aspect of its structural design.

[0003] In the production and assembly process of electric drills, the front end of the housing is typically secured using screw connections. However, this traditional method has a significant drawback: because the speed control knob of the electric drill needs to be moved forward to switch gears, its movement trajectory is highly susceptible to spatial interference with the screw posts used to secure the front end. To avoid this interference, the design often has to forgo placing screw posts at the front end of the housing, resulting in a lack of effective fixing points at the front end of the housing, insufficient connection strength, and impact on the overall stability and reliability of the machine. Utility Model Content

[0004] The technical problem to be solved by this utility model is: in order to solve the problem in the prior art that the speed adjustment push button of the electric drill interferes with the screw post at the front end of the fixed housing, resulting in the inability to arrange the screw post at the front end of the housing and to achieve reliable fixation, this utility model provides a fixing mechanism for the front end of the electric drill housing.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a fixing mechanism for the front end of an electric drill housing, including an electric drill assembly, upper and lower housings and screws for fixing; The outer wall of the electric drill assembly is provided with positioning feature one and positioning feature two; The inner walls of the upper and lower housings are respectively provided with positioning feature one and positioning feature two. Positioning feature one is adapted to and engaged with positioning feature one, and positioning feature two is adapted to and engaged with positioning feature two, so as to realize the positioning between the electric drill assembly and the upper and lower housings. The screws pass through the upper and lower housings to fix the upper and lower housings to the electric drill assembly, and are positioned to avoid the forward cutting path of the electric drill speed control push button, so as to avoid interference with the speed control push button cutting.

[0006] Furthermore, it also includes a gearbox, which is integrated into the front end of the electric drill assembly. The outer wall of the gearbox is provided with a decorative cover, and the decorative cover and the gearbox are integrally formed.

[0007] Furthermore, the outer wall of the gearbox is provided with a positioning feature three, and the inner walls of the upper and lower housings are provided with a mating structure adapted to the positioning feature three. The positioning feature three and the mating structure are tightly connected to achieve clamping and positioning of the gearbox and the upper and lower housings in the lateral direction.

[0008] Furthermore, the end of the positioning feature three is provided with a chamfer feature, which is used to guide the positioning feature three into the mating structure of the inner wall of the upper and lower housings.

[0009] Furthermore, the outer wall of the gearbox is provided with feature one, and the inner wall of the upper and lower housings is provided with feature two corresponding to feature one. The centers of feature one and feature two are eccentrically set, and the included angle between the two centers is 179.45 degrees. The screw passes through feature two and is fixedly connected to feature one to enhance the fixing effect between the upper and lower housings and the gearbox.

[0010] Furthermore, the positioning feature one and positioning feature two are integrally formed with the electric drill assembly, and the positioning mating feature one and positioning mating feature two are integrally formed with the upper and lower housings.

[0011] Furthermore, the first positioning feature and the second positioning feature are boss structures, and the first positioning mating feature and the second positioning mating feature are groove structures adapted to the boss structure. The mating gap between the boss structure and the groove structure is no more than 0.2mm to ensure positioning accuracy.

[0012] Furthermore, the number of screws is at least one, and they are evenly distributed circumferentially along the front end of the upper and lower housings. The screws are cross-head countersunk screws or hexagon countersunk screws, and the screws are made of stainless steel or high-strength alloy.

[0013] Furthermore, the upper and lower housings are made of engineering plastics, preferably PA6-GF30, which has the advantages of higher compressive strength and stronger temperature resistance than ABS material, making it more suitable for high-load scenarios. The housing of the electric drill assembly is made of PA66-GF30 to balance lightweight, structural strength and economy.

[0014] The beneficial effects of this utility model are: The fixing mechanism for the front end of the electric drill housing described in this utility model completely avoids spatial interference between the front fixing point and the forward path of the speed control push button by using a snap-fit ​​connection instead of the traditional screw post connection. It eliminates the step of tightening screws at the front end. During assembly, simply place the assembly into the lower housing and press it into place to achieve automatic snap-fit ​​fixing at the front end, which simplifies the operation process and improves production efficiency. The plasticity of the gearbox material is used to achieve a tight fit, and the snap-fit ​​structure can provide sufficient holding force to ensure that the front end of the housing remains firmly connected even under vibration. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Figure 1 This is a schematic diagram of the electric drill assembly according to a preferred embodiment of the present utility model; Figure 2 This is a schematic diagram of the gearbox structure according to a preferred embodiment of the present invention; Figure 3 This is a schematic diagram of the upper and lower housings according to a preferred embodiment of the present invention; Figure 4 This is a schematic diagram of the electric drill assembly inserted into the housing according to a preferred embodiment of the present invention; In the diagram, 1. Gearbox, 101. Decorative cover, 103. Positioning feature three, 104. Feature one, 2. Upper and lower housings, 202. Positioning fit feature one, 203. Positioning fit feature two, 204. Feature two, 3. Electric drill assembly, 301. Positioning feature one, 302. Positioning feature two, 4. Screw. Detailed Implementation

[0017] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0018] In the description of this utility model, it should be understood that the terms "upper", "lower", "horizontal", "top", "inner", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] like Figure 1-4 As shown, a fixing mechanism for the front end of an electric drill housing includes an electric drill assembly 3, upper and lower housings 2, and screws 4 for fixing. The outer wall of the electric drill assembly 3 is provided with positioning feature 301 and positioning feature 302; The inner walls of the upper and lower housings 2 are respectively provided with positioning feature 1 202 and positioning feature 203. Positioning feature 1 202 is adapted to and cooperates with positioning feature 1 301, and positioning feature 203 is adapted to and cooperates with positioning feature 2 302, so as to realize the positioning between the electric drill assembly 3 and the upper and lower housings 2. The screw 4 passes through the upper and lower housings 2 to fix the upper and lower housings 2 to the electric drill assembly 3, and its position avoids the forward cutting path of the electric drill speed control push button to avoid interference with the speed control push button cutting.

[0021] The assembly also includes a gearbox 1, which is integrated into the front end of the electric drill assembly 3. The outer wall of the gearbox 1 is provided with a decorative cover 101, which is integrally formed with the gearbox 1. The outer wall of the gearbox 1 is also provided with a positioning feature 103. The inner walls of the upper and lower housings 2 are correspondingly provided with mating structures adapted to the positioning feature 103. The positioning feature 103 is tightly fitted to the mating structures to achieve clamping and positioning of the gearbox 1 and the upper and lower housings 2 in the lateral direction. The end of the positioning feature 103 is provided with a chamfer feature, which guides the positioning feature 103 into the mating structure of the inner wall of the upper and lower housings 2. The outer wall of the gearbox 1 is provided with feature 104, and the inner wall of the upper and lower housings 2 is provided with feature 204 corresponding to feature 104. The centers of feature 104 and feature 204 are eccentrically set, and the included angle between the two centers is 179.45 degrees. The screw 4 passes through feature 204 and is fixedly connected to feature 104 to enhance the fixing effect between the upper and lower housings 2 and the gearbox 1.

[0022] Positioning feature 301 and positioning feature 302 are integrally formed with the drill assembly 3, and positioning mating feature 202 and positioning mating feature 203 are integrally formed with the upper and lower housings 2. Positioning feature 301 and positioning feature 302 are boss structures, and positioning mating feature 202 and positioning mating feature 203 are groove structures adapted to the boss structures. The mating gap between the boss structure and the groove structure is no greater than 0.2mm to ensure positioning accuracy.

[0023] The number of screws 4 is at least one, and they are evenly distributed circumferentially along the front end of the upper and lower housings 2. The screws 4 are cross-head countersunk screws or hexagon countersunk screws, and the screws 1 are made of stainless steel or high-strength alloy. The upper and lower housings 2 are made of PA6-GF30 material, and the outer shell of the electric drill assembly 3 is made of PA66-GF30 material to balance lightweight and structural strength.

[0024] During assembly, the operator tilts the drill assembly 3 at a certain angle, first placing its rear end into the lower housing 2, and then pressing it forward and downward to initially align the positioning features 301 and 302 on the assembly with the positioning mating features 202 and 203 on the housing. Continuing to press down, the positioning feature 103 on the gearbox 1, guided by its chamfered front end, contacts and squeezes into the mating structure on the inner wall of the lower housing 2. Utilizing the slight elastic deformation of the gearbox material, it ultimately snaps into place, achieving a tight fit and fixation of the front end of the housing. Afterward, other components are assembled, the upper housing is closed, and finally, screws 4 are used at the rear of the housing for final tightening, completing the entire assembly process.

[0025] In this specification, the illustrative expressions of the terms do not necessarily refer to the same embodiments. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments.

[0026] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A fixing mechanism for the front end of an electric drill housing, characterized in that, Includes the electric drill assembly (3), upper and lower housings (2), and screws (4) for fixing; The outer wall of the electric drill assembly (3) is provided with positioning feature one (301) and positioning feature two (302); The inner walls of the upper and lower housings (2) are respectively provided with positioning feature one (202) and positioning feature two (203). Positioning feature one (202) is adapted to position feature one (301), and positioning feature two (203) is adapted to position feature two (302) to realize the positioning between the electric drill assembly (3) and the upper and lower housings (2); The screw (4) passes through the upper and lower housings (2) to fix the upper and lower housings (2) to the electric drill assembly (3), and its position avoids the forward cutting path of the electric drill speed control push button, so as to avoid interference with the cutting of the speed control push button.

2. The fixing mechanism for the front end of an electric drill housing according to claim 1, characterized in that, It also includes a gearbox (1), which is integrated into the front end of the electric drill assembly (3). The outer wall of the gearbox (1) is provided with a decorative cover (101), and the decorative cover (101) and the gearbox (1) are integrally formed.

3. The fixing mechanism for the front end of an electric drill housing according to claim 2, characterized in that, The outer wall of the gearbox (1) is also provided with positioning feature three (103), and the inner wall of the upper and lower housings (2) is provided with a matching structure adapted to the positioning feature three (103). The positioning feature three (103) is tightly connected with the matching structure to achieve clamping and positioning of the gearbox (1) and the upper and lower housings (2) in the lateral direction.

4. The fixing mechanism for the front end of an electric drill housing according to claim 3, characterized in that, The end of the positioning feature three (103) is provided with a chamfer feature, which is used to guide the positioning feature three (103) to be inserted into the mating structure of the inner wall of the upper and lower housings (2).

5. The fixing mechanism for the front end of an electric drill housing according to claim 2, characterized in that, The outer wall of the gearbox (1) is provided with feature one (104), and the inner wall of the upper and lower housings (2) is provided with feature two (204) corresponding to feature one (104). The centers of feature one (104) and feature two (204) are eccentrically set, and the included angle between the two centers is 179.45 degrees. The screw (4) passes through feature two (204) and is fixedly connected to feature one (104) to enhance the fixing effect between the upper and lower housings (2) and the gearbox (1).

6. The fixing mechanism for the front end of an electric drill housing according to claim 1, characterized in that, The positioning feature one (301) and positioning feature two (302) are integrally formed with the electric drill assembly (3), and the positioning matching feature one (202) and positioning matching feature two (203) are integrally formed with the upper and lower housings (2).

7. The fixing mechanism for the front end of an electric drill housing according to claim 1, characterized in that, The positioning feature one (301) and positioning feature two (302) are boss structures, and the positioning mating feature one (202) and positioning mating feature two (203) are groove structures adapted to the boss structure. The mating gap between the boss structure and the groove structure is no more than 0.2mm to ensure positioning accuracy.

8. The fixing mechanism for the front end of an electric drill housing according to claim 1, characterized in that, The number of screws (4) is at least one, and they are evenly distributed around the front end of the upper and lower housings (2). The screws (4) are cross-head countersunk screws or internal hex countersunk screws. The material of the screws (4) is stainless steel or high-strength alloy.

9. The fixing mechanism for the front end of an electric drill housing according to claim 1, characterized in that, The upper and lower housings (2) are made of engineering plastics, and the outer shell of the electric drill assembly (3) is made of PA66-GF30, so as to balance lightweight, structural strength and economy.

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