A structure of a chain saw which is easy to assemble

Abstract

The utility model relates to chain saw casing structure technical field, concretely relates to a kind of structure of the chain saw of convenient assembly, including upper casing, lower casing and motor assembly, motor assembly is realized pre-fixing with lower casing by buckle structure, upper casing is covered on lower casing and is formed complete outer shell with lower casing, the outer side of upper casing is equipped with first screw hole, the inner side of lower casing is equipped with the second screw hole corresponding with first screw hole, motor assembly insertion end is equipped with the third screw hole with first screw hole same side arrangement, the outer side of upper casing is equipped with the fourth screw hole corresponding with third screw hole.The utility model realizes the pre-fixing of motor assembly and lower casing by buckle structure, after covering upper casing, screw can be driven from the same side of casing, the fixing of upper casing and lower casing, the fixing of motor assembly and upper casing are completed simultaneously, to realize the one-way, adjustmentless continuous operation of screw installation process, to shorten assembly time, reduce operation complexity.

Description

Technical Field

[0001] This utility model relates to the technical field of chainsaw housing structure, specifically a structure for convenient assembly of chainsaws. Background Technology

[0002] As a commonly used power tool in logging and timber processing, the core structure of a chainsaw consists of a housing assembly and a motor. The assembly efficiency of the housing assembly and the installation stability of the motor directly affect the production efficiency and reliability of the chainsaw.

[0003] Patent CN221021397U discloses a chainsaw structure that is easy to assemble, including a first outer shell, a second outer shell, and a motor. The motor includes a motor housing with a flange structure and a fourth screw hole. The first outer shell has a mounting groove for inserting the motor housing and a third screw hole corresponding to the fourth screw hole. When the first and second outer shells are combined, the second outer shell abuts against one end of the motor housing, and the flange structure on the motor housing contacts the inner side of the first outer shell, with the fourth screw hole on the flange structure corresponding to the third screw hole on the first outer shell. The first outer shell has a first screw hole, and the second outer shell has a second screw hole corresponding to the first screw hole. The first and third screw holes are arranged on the same plane. This utility model has a simple and convenient assembly process, reduces the difficulty of assembly, greatly improves assembly efficiency and assembly cost, and is conducive to realizing automated assembly.

[0004] However, the above technical solutions still have shortcomings in practical applications that limit further improvement in assembly efficiency:

[0005] The motor housing needs to be positioned using the first housing and screws. Subsequently, the entire housing structure of the fixed motor must be flipped to complete the installation of the second housing and the first housing. This requires a four-step process: "fixing the motor housing with screws - flipping the housing - installing the other half of the housing - fixing the entire housing with screws". The flipping of the housing adds an extra step to the operation. Furthermore, the existence of the flipping process makes it impossible to achieve continuous operation without adjustment in one direction when installing screws.

[0006] Therefore, a structure for easy assembly of chainsaws is proposed to solve the problems mentioned above. Utility Model Content

[0007] To address the shortcomings of existing technologies, this utility model provides a convenient assembly structure for chainsaws. A snap-fit ​​structure pre-fixes the motor assembly to the lower housing. Combined with the design of screw holes arranged on the same side and facing the same direction on the upper housing, lower housing, and motor assembly, screws can be driven in from the same side of the housing after the upper housing is closed, simultaneously fixing the upper and lower housings and the motor assembly to the upper housing. This optimizes the process of "screwing the motor housing - flipping the housing - installing the other half of the housing - screwing the entire housing" into a process of "snap-fitting pre-fixing - closing the housing - single-sided screw locking." This achieves unidirectional, adjustment-free continuous operation during screw installation, thereby shortening assembly time and reducing operational complexity, thus solving the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution: it includes an upper housing, a lower housing, and a motor assembly. The motor assembly and the lower housing are pre-fixed by a snap-fit ​​structure. The upper housing covers the lower housing and forms a complete outer shell with the lower housing.

[0009] The outer side of the upper housing is provided with a first screw hole, the inner side of the lower housing is provided with a second screw hole corresponding to the first screw hole, the insertion end of the motor assembly is provided with a third screw hole arranged on the same side as the first screw hole, and the outer side of the upper housing is provided with a fourth screw hole corresponding to the third screw hole.

[0010] Preferably, the openings of the first screw hole, the second screw hole, the third screw hole, and the fourth screw hole face the same direction.

[0011] Preferably, the snap-fit ​​structure includes two snap protrusions disposed on the outer side wall of the motor assembly and a snap groove disposed on the inner side wall of the lower housing, the snap groove corresponding to the snap protrusions, and the snap protrusions being inserted into the lower housing from the snap groove.

[0012] Preferably, the lower housing has an inner cavity that is adapted to the insertion end of the motor assembly, and the inner wall of the mounting cavity is in contact with the outer wall of the insertion end of the motor assembly.

[0013] Preferably, the mounting cavity is provided with a rotation limiting block adapted to the locking protrusion, and the surfaces of the locking protrusion and the motor assembly housing opposite to each other are in contact with the inner and outer surfaces of the lower housing.

[0014] Preferably, the insertion end of the motor assembly has a groove at the third screw hole, and the groove is adapted to the screw post of the fourth screw hole.

[0015] Compared with the prior art, this utility model provides a structure for convenient assembly of chainsaws, which has the following beneficial effects:

[0016] 1. The motor assembly and the lower housing are pre-fixed through a snap-fit ​​structure. With the screw holes on the upper housing, lower housing and motor assembly arranged on the same side and facing the same direction, screws can be driven in from the same side of the housing after the upper housing is closed. The upper housing and the lower housing are fixed at the same time, and the motor assembly is fixed to the upper housing. The process of "screw fixing motor housing - flipping housing - installing the other half of housing - screw fixing all housing" is optimized into the process of "screw rotation pre-fixing - closing housing - single-sided screw locking". This realizes unidirectional, adjustment-free continuous operation in the screw installation process, thereby shortening the assembly time and reducing the complexity of operation. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 A frontal perspective view of the structure of the chainsaw for easy assembly according to this utility model;

[0019] Figure 2 A three-dimensional back view of the structure of the chainsaw for easy assembly according to this utility model;

[0020] Figure 3 A schematic diagram of the end structure of the motor assembly for the convenient assembly of the chainsaw of this utility model;

[0021] Figure 4 A schematic diagram of the inner side structure of the lower housing provided for the structure of the convenient assembly chainsaw of this utility model;

[0022] Figure 5 A schematic diagram of the inner side structure of the upper housing provided for the structure of the convenient assembly chainsaw of this utility model;

[0023] Figure 6 A schematic diagram of the internal structure of the motor assembly provided for the structure of the conveniently assembled chainsaw of this utility model;

[0024] Figure 7 A schematic diagram of the overall three-dimensional structure of the chainsaw provided for the convenient assembly structure of this utility model.

[0025] In the diagram: 1. Upper housing; 2. Lower housing; 3. Motor assembly; 4. First screw hole; 5. Second screw hole; 6. Third screw hole; 7. Fourth screw hole; 8. Snap protrusion; 9. Snap groove; 10. Mounting cavity; 11. Rotation limit block; 12. Groove. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not 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 effort are within the protection scope of the present utility model.

[0027] Example:

[0028] Please see Figure 1 - Figure 7 The structure of a conveniently assembled chainsaw in this embodiment includes an upper housing 1, a lower housing 2, and a motor assembly 3. The motor assembly 3 and the lower housing 2 are pre-fixed by a snap-fit ​​structure. The upper housing 1 covers the lower housing 2 and forms a complete outer shell with the lower housing 2. The outer shell of the motor assembly 3 is connected as an integral structure. The motor assembly 3 integrates a motor and control circuit. The internal structure of the motor assembly 3 is a mature existing technology, and the specific internal structure will not be described in detail here. It can be directly used as an independent assembly unit during installation. The lower housing 2 has an installation cavity 10 that is adapted to the insertion end of the motor assembly 3. The inner wall of the installation cavity 10 fits against the outer wall of the insertion end of the motor assembly 3. The fitting design can form a radial limit on the motor assembly 3 to prevent large shaking and ensure the initial installation accuracy.

[0029] The snap-fit ​​structure includes two snap protrusions 8 on the outer side wall of the motor assembly 3 and a snap groove 9 on the inner side wall of the lower housing 2. The snap groove 9 corresponds to the snap protrusions 8. The snap protrusions 8 are inserted into the lower housing 2 from the snap groove 9. The precise fit between the snap protrusions 8 and the snap groove 9 can quickly complete the pre-fixation of the motor assembly 3 and the lower housing 2 without relying on screws for initial positioning, thus simplifying the initial installation steps.

[0030] Subsequently, the motor assembly 3 is rotated. The mounting cavity 10 is equipped with a rotation limiting block 11 that matches the locking protrusion 8. The surfaces of the locking protrusion 8 and the housing of the motor assembly 3 are in contact with the inner and outer surfaces of the lower housing 2. The rotation limiting block 11 can limit the rotation angle of the motor assembly 3, which is convenient for hole alignment. The contact between the locking protrusion 8 and the housing surface further improves the structural stability after pre-fixation, ensuring that the motor assembly 3 will not have a large displacement in subsequent operations.

[0031] Meanwhile, the insertion end of the motor assembly 3 has a groove 12 at the third screw hole 6. The groove 12 is adapted to the screw post of the fourth screw hole 7. The engagement of the screw post and the groove 12 can accurately position the motor assembly 3, ensuring that the third screw hole 6 on the motor assembly 3 is precisely aligned with the fourth screw hole 7 of the upper housing 1.

[0032] The upper housing 1 has a first screw hole 4 on its outer side, the lower housing 2 has a second screw hole 5 on its inner side corresponding to the first screw hole 4, the motor assembly 3 has a third screw hole 6 on the same side as the first screw hole 4 at its insertion end, and the upper housing 1 has a fourth screw hole 7 on its outer side corresponding to the third screw hole 6. The openings of the first screw hole 4, the second screw hole 5, the third screw hole 6 and the fourth screw hole 7 are all facing the same direction. The upper housing 1 and the lower housing 2, and the motor assembly 3 and the upper housing 1 can be fixed simultaneously by driving screws in from the same side of the housing without flipping the housing, thus simplifying the assembly process.

[0033] If the motor or control circuit fails during subsequent use, the entire motor assembly 3 can be directly replaced.

[0034] The design of all screw holes on the same side and in the same direction not only adapts to the unidirectional operation habits of manual assembly, but also allows direct connection to automated assembly equipment without the need to adjust the operating angle of the equipment, thus providing convenience for industrialized mass production.

[0035] The working principle of the above embodiment is as follows: First, insert the insertion end of the motor assembly 3 into the mounting cavity 10 of the lower housing 2, so that the snap protrusion 8 on the outer side wall of the motor assembly 3 is inserted from the snap groove 9 on the inner side wall of the lower housing 2. Rotate the motor assembly 3 until the snap protrusion 8 is in contact with the limiting surface of the rotation limiting block 11, and the motor assembly 3 reaches the preset installation position. Then, cover the upper housing 1. At this time, the groove 12 of the motor assembly 3 is engaged and positioned with the screw post of the fourth screw hole 7 of the upper housing 1.

[0036] Screws are driven into the first screw hole 4 from the same side of the housing and threaded into the second screw hole 5 to fix the upper housing 1 and the lower housing 2. Screws are driven into the fourth screw hole 7 and threaded into the third screw hole 6 to fix the motor assembly 3 and the upper housing 1, thus completing the overall assembly.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A structure for convenient assembly of a chainsaw, characterized in that: It includes an upper housing (1), a lower housing (2) and a motor assembly (3). The motor assembly (3) and the lower housing (2) are pre-fixed by a snap-fit ​​structure. The upper housing (1) covers the lower housing (2) and forms a complete outer shell with the lower housing (2). The upper housing (1) has a first screw hole (4) on its outer side, the lower housing (2) has a second screw hole (5) on its inner side corresponding to the first screw hole (4), the motor assembly (3) has a third screw hole (6) on the same side as the first screw hole (4) at its insertion end, and the upper housing (1) has a fourth screw hole (7) on its outer side corresponding to the third screw hole (6).

2. The structure of a conveniently assembled chainsaw according to claim 1, characterized in that: The openings of the first screw hole (4), the second screw hole (5), the third screw hole (6), and the fourth screw hole (7) are oriented in the same direction.

3. The structure of a conveniently assembled chainsaw according to claim 1, characterized in that: The buckle structure includes two buckle protrusions (8) disposed on the outer side wall of the motor assembly (3) and a buckle groove (9) disposed on the inner side wall of the lower housing (2). The buckle groove (9) corresponds to the buckle protrusions (8), and the buckle protrusions (8) are inserted into the lower housing (2) from the buckle groove (9).

4. The structure of a conveniently assembled chainsaw according to claim 3, characterized in that: The lower housing (2) has an inner side with a mounting cavity (10) adapted to the insertion end of the motor assembly (3), and the inner wall of the mounting cavity (10) fits against the outer wall of the insertion end of the motor assembly (3).

5. The structure of a conveniently assembled chainsaw according to claim 4, characterized in that: The mounting cavity (10) is provided with a rotation limiting block (11) that is adapted to the card protrusion (8). The surfaces of the card protrusion (8) and the housing of the motor assembly (3) are in contact with the surfaces of the inner and outer sides of the lower housing (2).

6. The structure of a conveniently assembled chainsaw according to claim 1, characterized in that: The insertion end of the motor assembly (3) is provided with a groove (12) at the third screw hole (6), and the groove (12) is adapted to the screw post of the fourth screw hole (7).

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