A connecting structure of a fascia gun

Abstract

The utility model relates to a kind of connecting structure of fascia gun, including middle cover, motor support, middle cover is assembled with motor support, further including fixed shell, fixed shell one end is set in middle cover, the other end is connected motor support, fixed shell is used to fixedly mount middle cover on motor support;Fixed shell is close to the one end of motor support and set first thread, corresponding second thread is set on motor support, and fixed shell and motor support are assembled by first thread and second thread. The above connecting structure is fixed to middle cover using fixed shell, with high stability, low cost and the advantages such as low assembly difficulty.

Description

Technical Field

[0001] This utility model relates to a fascia gun, and more particularly to a connecting structure for a fascia gun. Background Technology

[0002] The existing method for connecting the inner cover of a fascia gun involves four machine screws that pass through the outer shell of the fascia gun and are then locked to the motor bracket. For small / portable fascia guns, due to size limitations and for aesthetic reasons, the machine screws can only be installed on the inside of the inner cover. The screw holes on the inner cover are not perfectly round holes but have broken edges. During the manufacturing process of the metal inner cover, these broken edges are prone to producing burrs, affecting screw assembly. Furthermore, because of the broken screw holes, the screws are prone to angled locking, affecting the assembly result. Moreover, because only smaller screws can be used, the tightening force is poor, and stripping is common, making disassembly impossible.

[0003] Therefore, a new structure is needed to replace the solution of fixing the middle cover with screws. Utility Model Content

[0004] In view of the above situation, it is necessary to provide a connection structure for a fascia gun that solves at least one of the above problems.

[0005] A connecting structure for a fascia gun includes a middle cover and a motor bracket, wherein the middle cover is assembled to the motor bracket, and a fixing shell is also included. One end of the fixing shell is disposed inside the middle cover, and the other end is connected to the motor bracket. The fixing shell is used to fix the middle cover to the motor bracket. The fixed housing is provided with a first thread at one end near the motor bracket, and the motor bracket is provided with a corresponding second thread. The fixed housing and the motor bracket are assembled through the first thread and the second thread.

[0006] As a further embodiment of this utility model: the middle cover is located outside the outer shell of the fascia gun and fits against the outer shell under the action of the fixing shell.

[0007] As a further embodiment of this utility model: the inner end of the middle cover near the outer shell is provided with an inwardly protruding step, and the outer side of the fixed shell opposite to the first thread is provided with an outwardly protruding shoulder; when the first thread and the second thread are engaged, the step and the shoulder contact each other, and the shoulder applies a pressing force to the step.

[0008] As a further embodiment of this utility model: the motor bracket is an outward extension of the motor stator.

[0009] The aforementioned connection structure uses a fixed shell to secure the middle cover, offering advantages such as high stability, low cost, and easy assembly. Attached Figure Description

[0010] Figure 1 This is an assembly diagram of the fixed shell and the motor bracket according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of the structure of the fixing shell according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the integrated structure of the motor and motor bracket according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the motor bracket structure according to an embodiment of the present utility model; Figure 5 yes Figure 1 Enlarged view of point A in the middle. Detailed Implementation

[0011] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0012] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "center," "longitudinal," "lateral," "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0013] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0014] like Figures 1-5As shown, this utility model discloses a connection structure for a fascia gun, including a middle cover 100, a motor bracket 200, and a fixing shell 300. The middle cover 100 is a decorative piece used to cover the holes on the outer shell for moving parts, and it is assembled onto the motor bracket 200 via the fixing shell 300. The fixing shell 300 includes a first thread 310 at one end and a shoulder 320 at the end opposite to the first thread 310. From the outside, it is a two-section cylinder with an external thread at the end with a smaller diameter. The interior of the fixing shell 300 is a through hole for the moving parts of the fascia gun to pass through. Several notches 330 are provided on the inner edge of the fixing shell 300 near the shoulder 320, which facilitate installation. During installation, the mounting housing 300 needs to pass through the middle cover 100 before being inserted into the motor bracket 200 and threaded together. Therefore, the mounting housing 300 needs to be rotated from the inside, i.e., through the through hole. The notch 330 facilitates the tool's gripping of the mounting housing 300 and its rotation. Because the thread size is much larger than that of a grommet screw, the mounting housing 300 is more stable and stronger than traditional grommets, and assembly is simpler, avoiding assembly problems such as screw misalignment, stripping, and instability. Furthermore, compared to drilling a broken screw hole on the middle cover 100, machining a step on the middle cover 100 is significantly simpler and has lower processing costs.

[0015] Furthermore, on the inner edge of the middle cover 100, near the end of the fixing shell 300, a step 110 is provided. The step 110 protrudes inward, and its shape matches the shape of the shoulder 320. The edge of the middle cover 100 near the fixing shell 300 abuts against the outer shell of the fascia gun. The fixing shell 300 is inserted through the middle cover 100, at which point the step 110 is clamped between the shoulder 320 and the fascia gun outer shell. As the fixing shell 300 screws into the motor bracket 200, the step 110 is also subjected to the clamping force of the shoulder 320 and the fascia gun outer shell, thus fixing the middle cover 100 to the fascia gun. Using this locking method, the force points are the step 110, the shoulder 320, the fascia gun outer shell, and the threads on the fixing shell 300 / motor bracket 200. Compared to traditional grommets, the dimensions of each force-bearing part are magnified by tens of times, providing greater locking force, resulting in better overall assembly stability. Furthermore, the structure is simple, facilitating production and disassembly.

[0016] Furthermore, the motor bracket 200 adopts an integrated motor bracket; specifically, the motor bracket 200 is an integrated component formed by the axial extension of the motor stator. The motor 400 is an external rotor brushless motor, and its outer shell 410, which houses the magnets, is the rotor. The stator includes an iron core 420 with coils wound around it and a motor bracket base 220. The motor bracket base 220 is cylindrical, and its two ends are assembled to the output shaft 430 of the motor 400 via bearings. The iron core 420 is located outside the motor bracket base 220. The motor bracket base 220 extends in the direction of the output shaft 430 to form a frame 230. A circular hole is provided on the side of the frame 230, and a second thread 210 is provided on the inner wall of the hole. In this embodiment, the motor bracket 200 can be regarded as the stator part of the motor 400. Compared with the frame fastened to the motor with screws in the traditional solution, this structure has significantly better stability. Moreover, this structure also reduces an assembly process, which can basically offset the increased cost caused by the complex shape.

[0017] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A connecting structure for a fascia gun, comprising a middle cover (100) and a motor bracket (200), wherein the middle cover (100) and the motor bracket (200) are assembled, characterized in that: It also includes a fixing shell (300), one end of which is disposed inside the middle cover (100) and the other end is connected to the motor bracket (200). The fixing shell (300) is used to fix the middle cover (100) to the motor bracket (200). The fixed shell (300) has a first thread (310) at one end near the motor bracket (200), and the motor bracket (200) has a corresponding second thread (210). The fixed shell (300) and the motor bracket (200) are assembled through the first thread (310) and the second thread (210).

2. The connection structure as described in claim 1, characterized in that: The middle cover (100) is located outside the outer shell of the fascia gun and fits against the outer shell of the fascia gun under the action of the fixing shell (300).

3. The connection structure as described in claim 2, characterized in that: The inner end of the middle cover (100) near the outer shell of the fascia gun is provided with an inwardly protruding step (110), and the outer side of the fixed shell (300) away from the first thread (310) is provided with an outwardly protruding shoulder (320); when the first thread (310) and the second thread (210) are engaged, the step (110) and the shoulder (320) contact each other, and the shoulder (320) applies a clamping force to the step (110).

4. The connection structure as described in claim 1, characterized in that: The motor bracket (200) is an outward extension of the stator of the motor (400).

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