Front end shell assembly of impact wrench

Abstract

The invention discloses a front end shell assembly of an impact wrench. The front end shell assembly comprises a first shell, a clamping ring, a second shell and two lamp bead pieces. The two opposite positions of the clamping ring are provided with outward bent parts, and after the clamping ring is clamped in the first groove, the two bent parts exceed the outer wall of the protruding part to form clamping points. Positioning between the first shell and the second shell is achieved through the second extending part of the second shell and the second groove of the first shell, and a wire groove allowing a power line of the lamp bead piece to penetrate out is formed between the second extending part and the second groove. Two clamping grooves are formed in the inner ring of the second shell, and the second shell is clamped and fixed to the first shell through cooperation of the two clamping grooves and the two clamping points. The device has the advantages of being simple in structure and convenient to assemble, and all parts are convenient to machine.

Description

Technical Field

[0001] The invention relates to an impact wrench, in particular to a front end housing assembly of the impact wrench. Background Art

[0002] An impact wrench generally includes: a grip housing assembly, a front housing assembly, a planetary gear reducer, a brushless motor, an adjustment module, a brushless motor driver, a battery, and a drill bit, etc. Among them, the front housing assembly generally includes: a cylindrical first housing and an annular second housing. The first housing is used to match the planetary gear reducer, and the front part of the planetary gear reducer is inserted into the front housing assembly. The front end of the output shaft is a chuck for clamping and fixing the drill bit, and the chuck passes through the front housing assembly. The second housing is provided with a light source, which is installed on the first housing. When the drill bit rotates, the light source lights up and can be used as a prompt and auxiliary lighting. In the existing front housing assembly, the second housing is generally installed to the first housing by bolts. Summary of the invention

[0003] The present application provides a front housing assembly for an impact wrench, which can solve the problems of a complicated structure, inconvenient processing and inconvenient assembly at the connection between the first housing and the second housing in the existing front housing assembly. In addition to impact wrenches, the front housing assembly can also be used for handheld electric drills, impact drivers and other tools.

[0004] In the present application, a front housing assembly of an impact wrench is provided, comprising: A cylindrical first shell, wherein the first end face is an opening, the second end face is provided with a coaxial convex portion and a through hole, the outer wall of the convex portion is provided with a first groove; the outer wall is also provided with a second groove connecting the first end face and the second end face; A clamping ring is clamped in the first groove, and two opposite positions are provided with outwardly curved portions to form clamping points beyond the outer wall of the raised portion; The second annular housing has two slots on its inner ring that are fixedly connected to the two clamping points; The third end surface of the first housing is provided with a third groove and a second extension portion inserted into the second groove to form a wire slot; Two lamp bead pieces connected in parallel are installed in the third groove; one of the lamp bead pieces is also connected to a power line, and the power line passes through the wire groove.

[0005] In some embodiments, the two lamp bead pieces are both fixed with a mounting portion for mounting with the second shell; the slot is formed by combining the second shell and the mounting portion.

[0006] In some implementations, the two lamp bead pieces and the second extending portion are in the same radial direction of the second shell.

[0007] In some embodiments, the second shell includes a transparent base and a covering layer covering the outer surface of the base; the covering layer is provided with through grooves at positions corresponding to the two lamp bead pieces.

[0008] In some embodiments, the covering layer is further provided with a raised sealing strip on the third end surface; and the second end surface of the first shell is provided with a sealing groove for the sealing strip to enter.

[0009] In some embodiments, the first groove is a closed circle, and the collar can rotate relative to the first groove.

[0010] In summary, in the present application, a front end housing assembly of an impact wrench includes a first housing, a clamping ring, a second housing and two lamp bead pieces. Outward bending parts are provided at two opposite positions of the clamping ring. After the clamping ring is clamped in the first groove, the two bending parts extend beyond the outer wall of the raised part to form a clamping point. The second extension part of the second housing and the second groove of the first housing realize the positioning between the first housing and the second housing, and a wire groove for the power cord of the lamp bead piece to pass through is formed between the second extension part and the second groove. The inner circle of the second housing is provided with two clamping grooves. Through the cooperation of these two clamping grooves and two clamping points, the second housing is clamped and fixed to the first housing. Beneficial effects: simple structure, convenient assembly, and convenient processing of each component. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background technology, the drawings required for use in the embodiments of the present application or the background technology will be described below.

[0012] Figure 1 A schematic diagram of this application; Figure 2 is a schematic diagram of a first shell; Figure 3 is a schematic diagram of the first shell from another viewing angle; Figure 4 is a schematic diagram of the clamping ring; Figure 5 is a schematic diagram of the clamping ring being installed on the first housing; Figure 6 A schematic diagram of another perspective of this application; Figure 7 It is a schematic diagram of the lamp bead piece being installed on the second shell; Figure 8 It is a schematic diagram that the second shell is composed of a base body and a covering layer.

[0013] In the figure, 1. first housing; 1a. raised portion; 1a1. first groove; 1b. through hole; 1c. second groove; 1d. first extension portion; 1e. sealing groove; 2. Clamp ring; 2a. Disconnection opening; 2b. Bending portion; 3. Second housing; 3a. Card slot; 3a1. Arc protrusion; 3b. Third groove; 3c. Second extension portion; 3d. Base; 3e. Covering layer; 3e1. Through groove; 3e2. Sealing strip; 4. Lamp bead piece; 4a. Power cord; 4b. Installation part; 5. Wire duct; 6. Light source. DETAILED DESCRIPTION

[0014] The following is further described in conjunction with the accompanying drawings, which are only used as examples and are not strictly drawn to scale. Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Including" or "including" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. In the absence of conflict, the embodiments in the present application can be combined with each other.

[0015] See also Figure 1 and Figure 6 A front end housing assembly of an impact wrench includes a first housing 1, a clamping ring 2, a second housing 3 and two lamp bead pieces 4.

[0016] See also Figure 2 and Figure 3 The first shell 1 is cylindrical, and of the first and second opposite end faces, the first end face is open; the second end face is provided with a convex portion 1a and a through hole 1b, and the axes of the convex portion 1a and the through hole 1b coincide with the axis of the first shell 1. In other words, the convex portion 1a is cylindrical, and the through hole 1b penetrates the second end face and the convex portion 1a. A first groove 1a1 is provided on the outer wall of the convex portion 1a.

[0017] A second groove 1c is also provided on the outer wall of the first housing 1, and the second groove 1c communicates with the first end surface and the second end surface. That is, two ends of the second groove 1c extend toward the first end surface and the second end surface respectively, penetrating the first end surface and the second end surface.

[0018] See also Figure 4 and Figure 5 , the collar 2 is clamped in the first groove 1a1. More specifically, there is a disconnection opening 2a on the collar 2, which is deformed to enlarge the disconnection opening 2a and enter the first groove 1a1. After the collar 2 is restored, it cannot be separated from the first groove 1a1. Two opposite positions of the collar 2 are provided with outwardly bent portions 2b. After the collar 2 is clamped in the first groove 1a1, the two bent portions 2b exceed the outer wall of the raised portion 1a to form clamping points. These two clamping points are used for subsequent clamping and fixing of the second housing 3.

[0019] See also Figure 7 The second housing 3 is annular, and the middle is used for the convex part 1a of the first housing 1 to enter. The inner ring of the second housing 3 is provided with two card slots 3a, and the second housing 3 is fixed to the first housing 1 by the cooperation of the two card slots 3a and the two card points.

[0020] See also Figure 6 and Figure 7 The third end surface of the second housing 3 close to the first housing 1 is provided with a third groove 3b and a second extension portion 3c. After the second extension portion 3c is inserted into the second groove 1c, a wire groove 5 is formed between the two.

[0021] In some embodiments, the first groove 1a1 may not be closed, that is, the position where the first groove 1a1 is disconnected corresponds to the position of the disconnection opening 2a of the collar 2. After the collar 2 is inserted into the first groove 1a1, it cannot rotate relative to the first groove 1a1. In this way, the position where the collar 2 is installed in the first groove 1a1 is fixed, and accordingly, after the collar 2 is connected to the first groove 1a1, the relative positions of the two curved portions 2b on the protruding portion 1a are determined.

[0022] In some embodiments, the first groove 1a1 is a closed circle, and the collar 2 can rotate relative to the first groove 1a1. In this way, after the collar 2 is engaged with the first groove 1a1, the collar 2 is rotated to first adjust the relative positions of the two curved portions 2b on the convex portion 1a so that the two clamping points and the two clamping grooves 3a of the second housing 3 are staggered; then the second housing 3 is directly mounted on the first housing 1, and the matching state of the two is observed. If the matching is appropriate, the second housing 3 can be removed, and the relative positions of the two curved portions 2b on the convex portion 1a are readjusted so that the two clamping points and the two clamping grooves 3a of the second housing 3 are aligned; finally, the second housing 3 is mounted on the first housing 1.

[0023] See also Figure 7 , the two lamp beads 4 are connected in parallel and installed in the third groove 3b. More specifically, the second housing 3 is light-transmissive only at positions corresponding to the two lamp beads 4, forming a light source 6.

[0024] One of the lamp beads 4 is also connected to a power line 4a, which passes through the wire groove 5. The outer wall of the first housing 1 can also be provided with a plurality of first extensions 1d with mounting holes at a position close to the first end face, which are used to mount the front housing assembly on the grip housing of the impact wrench, and the passed power line 4a is introduced into the grip housing to connect the power supply installed in the grip housing.

[0025] In some embodiments, both lamp bead sheets 4 are fixed with mounting portions 4b for mounting with the second housing 3, and the slot 3a is formed by the second housing 3 and the mounting portion 4b. More specifically, the lamp bead sheets 4 and the mounting portion 4b can be bonded and fixed to the second housing 3. The inner wall of the inner circle of the second housing 3 is integrally provided with an arc protrusion 3a1, and the arc portion on the mounting portion 4b exceeds the inner wall, and forms a slot 3a with the arc protrusion 3a1. That is to say, the two lamp bead sheets 4 correspond to the two slots 3a one by one, and the two lamp bead sheets 4 are also relative.

[0026] Compared with the case where the card slot 3a is directly and integrally arranged on the inner wall of the inner circle of the second shell 3, this can make the second shell 3 more convenient to mold and process.

[0027] See also Figure 7 and Figure 8 In some embodiments, the second housing 3 includes a transparent substrate 3d and a cover layer 3e covering the surface of the substrate 3d. The cover layer 3e is provided with through grooves 3e1 at positions corresponding to the two lamp beads 4. More specifically, the substrate 3d can be made of plastic material, and the cover layer 3e can be made of rubber material.

[0028] The structure is simple and the processing is convenient, and the requirements of the two lamp bead pieces 4 for the light transmission position and the shielding position are met, so that the lamp bead pieces 4 are easy to be installed on the second shell 3 to form the light source 6.

[0029] See also Figure 5 and Figure 8 In some embodiments, based on the above-mentioned "the second housing 3 includes a transparent substrate 3d and a cover layer 3e covering the surface of the substrate 3d", the cover layer is further provided with a raised sealing strip 3e2 on the third end surface, and the second end surface is provided with a sealing groove 1e for the sealing strip 3e2 to enter. More specifically, a portion of the cover layer 3e covers the second extension portion 3c, and the two ends of the sealing strip 3e2 are respectively connected to the two sides of this portion. Correspondingly, the two ends of the sealing groove 1e are connected to the second groove 1c.

[0030] A sealing strip 3e2 is provided to improve the sealing between the second end surface of the first shell 1 and the third end surface of the third shell, and to protect the working environment of the two lamp beads 4 inside.

[0031] See also Figure 7In some embodiments, the two lamp bead pieces 4 and the second extension part 3c are in the same radial direction of the second housing 3. That is, the positions of the two lamp bead pieces 4 are also relative, one of the lamp bead pieces 4 is on the inner side of the second extension part 3c, and the power line 4a is arranged on the lamp bead piece 4, which is convenient for wiring the wires between the two lamp bead pieces 4 in the third groove 3b, and also convenient for the power line 4a to be led out from the wire groove 5.

Claims

1. A front housing assembly of an impact wrench, characterized in that: include: A cylindrical first shell (1) has an opening at the first end face, a coaxial convex portion (1a) and a through hole (1b) at the second end face, a first groove (1a1) at the outer wall of the convex portion (1a), and a second groove (1c) connecting the first end face and the second end face; The clamping ring (2) is clamped in the first groove (1a1), and is provided with outwardly curved portions (2b) at two opposite positions to form clamping points that extend beyond the outer wall of the raised portion (1a); The annular second housing (3) has two clamping grooves (3a) on its inner ring that are clamped and fixed to two clamping points; The third end surface of the first housing (1) is provided with a third groove (3b) and a second extension portion (3c) inserted into the second groove (1c) to form a wire slot (5); Two lamp bead pieces (4) connected in parallel are installed in the third groove (3b); one of the lamp bead pieces (4) is also connected to a power line (4a), and the power line (4a) passes through the wire groove (5).

2. A front housing assembly of an impact wrench according to claim 1, characterized in that: The two lamp bead pieces (4) are both provided with a mounting portion (4b) for mounting with the second shell (3); the card slot (3a) is formed by combining the second shell (3) and the mounting portion (4b).

3. A front housing assembly of an impact wrench according to claim 1, characterized in that: The two lamp bead pieces (4) and the second extension portion (3c) are located in the same radial direction of the second shell (3).

4. A front housing assembly for an impact wrench according to claim 1, characterized in that: The second shell (3) comprises a transparent base (3d) and a covering layer (3e) covering the surface of the base (3d); the covering layer (3e) is provided with through grooves (3e1) at positions corresponding to the two lamp bead pieces (4).

5. A front housing assembly of an impact wrench according to claim 4, characterized in that: The covering layer (3e) is also provided with a raised sealing strip (3e2) on the third end surface; and the second end surface of the first shell (1) is provided with a sealing groove (1e) for the sealing strip (3e2) to enter.

6. A front housing assembly for an impact wrench according to claim 1, characterized in that: The first groove (1a1) is a closed circle, and the clamping ring (2) can rotate relative to the first groove (1a1).

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