Box body structure of flame-retardant plastic gearbox

Abstract

The utility model discloses a flame-retardant plastic gearbox body structure which comprises a seat body, and a mounting groove is formed in the seat body; the two first connecting columns are symmetrically distributed on the two sides of the base body; the two second connecting columns are symmetrically distributed on the two sides of the base body; wherein the first connecting column and the second connecting column are arranged at an interval. The box body structure is formed by flame-retardant PC injection molding, flame retardance is achieved, meanwhile, the weight is effectively reduced, the first connecting column and the second connecting column which are arranged on the two sides of the base body are used for being rapidly clamped with the clamping openings in the frame body, and then the whole box body can be rapidly disassembled and assembled; and after the first connecting column and the second connecting column are connected, circumferential limiting of the box body in the horizontal direction is achieved, and in combination with the arrangement of the positioning column, the stability of the box body after positioning and installation is further improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of gear boxes, in particular to a flame-retardant plastic gear box body structure. BACKGROUND

[0002] Traditional gear boxes are generally connected with frames by fasteners, and in some electric garden tools, leaf fragments or grass fragments generated during pruning may enter the shell, and the shell needs to be cleaned frequently, and the traditional gear boxes are inconvenient to disassemble and assemble due to the fastener installation connection. CONTENT OF THE UTILITY MODEL

[0003] In order to improve the convenience of disassembling and assembling the gear box, the application provides a flame-retardant plastic gear box body structure.

[0004] The flame-retardant plastic gear box body structure provided by the application adopts the following technical scheme:

[0005] A flame-retardant plastic gear box body structure comprises:

[0006] A seat body is provided with a mounting groove;

[0007] A first connecting column is arranged on both sides of the seat body;

[0008] A second connecting column is arranged on both sides of the seat body;

[0009] The first connecting column and the second connecting column are arranged at intervals.

[0010] Preferably, a positioning column is arranged on both sides of the seat body, and the positioning column is arranged between the first connecting column and the second connecting column.

[0011] Preferably, the first connecting column and the second connecting column are the same in structure and each comprise:

[0012] A main body portion; and

[0013] An extension portion gradually reduces in diameter from one side of the main body portion.

[0014] Preferably, the first connecting column and the second connecting column are provided with at least one guide surface on the outer circumferential surface.

[0015] Preferably, the positioning column is provided with a groove with one side opening on the outer circumferential wall.

[0016] Preferably, the base includes an integral first base and a second base, with the first connecting post disposed on both sides of the first base and the second connecting post disposed on both sides of the second base; wherein, the first base is provided with a plurality of spaced first vertical reinforcing ribs on one end face, and the second base is provided with a plurality of second vertical reinforcing ribs on one end face, with one end of the first vertical reinforcing ribs extending toward one side of the second base and one end of the second vertical reinforcing ribs extending toward one side of the first base.

[0017] Preferably, the second base is further provided with a transverse reinforcing rib, one end of which is connected to the wall of the mounting groove.

[0018] In summary, this application includes at least one of the following beneficial technical effects:

[0019] 1. The first and second connecting columns on both sides of the base are used to quickly engage with the bayonet on the frame, which facilitates the quick assembly and disassembly of the entire box. After the first and second connecting columns are connected, the box is circumferentially limited in the horizontal direction. In combination with the setting of the positioning column, the positioning of the box and the stability after installation are further improved.

[0020] 2. The guide surfaces provided on the outer surfaces of the first and second connecting columns facilitate the quick entry of the first and second connecting columns into the opening of the bayonet. Furthermore, the guide surfaces can abut against the inner wall of the bayonet, reducing the possibility of the housing rotating around the first or second connecting column. Additionally, the diameter of the extension portion of the first and second connecting columns gradually decreases, which allows the housing to be quickly removed from the bayonet after being moved axially along the extension portion during disassembly, reducing sliding wear between the housing and the external frame and improving service life. Attached Figure Description

[0021] Figure 1 A schematic diagram of the flame-retardant plastic gearbox housing structure from one perspective;

[0022] Figure 2 This is a schematic diagram of the flame-retardant plastic gearbox housing structure from another perspective.

[0023] Figure 3 This is a top view of the flame-retardant plastic gearbox housing structure.

[0024] Explanation of reference numerals in the attached drawings: 1. Base; 11. First base; 12. Second base; 121. Mounting groove; 122. Mounting hole; 2. First connecting post; 21. Guide surface; 22. Main body; 23. Extension; 3. Second connecting post; 4. Positioning post; 41. Groove; 5. First vertical reinforcing rib; 6. Second vertical reinforcing rib; 7. Horizontal reinforcing rib. Detailed Implementation

[0025] The present application will be further described in detail below with reference to the accompanying drawings.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] Figure 1 and Figure 2 A flame-retardant plastic gearbox housing structure is shown, including a base 1, a first connecting post 2, a second connecting post 3, and a positioning post 4. The base 1 is made of flame-retardant PC through one-piece injection molding, which has a good flame-retardant effect.

[0029] The base 1 includes an integral first base 11 and a second base 12. Two first connecting posts 2 are respectively symmetrically connected to both sides of the first base 11, and the two first connecting posts 2 are coaxially arranged. Two second connecting posts 3 are respectively symmetrically connected to both sides of the second base 12, and the two second connecting posts 3 are coaxially arranged. At the same time, the axes of the second connecting posts 3 and the first connecting posts 2 are parallel.

[0030] The first base 11 and the second base 12 have a certain height difference, which means that the first connecting column 2 and the second connecting column 3 are distributed at intervals while also having a certain height difference. This is related to the frame structure to which the box is to be connected. There are also two positioning columns 4, which are located on both sides of the first base 11. The positioning columns 4 are also located between the first connecting column 2 and the second connecting column 3. The positioning columns 4 also have grooves 41 on their outer surfaces to reduce their weight.

[0031] The outer surfaces of the first connecting column 2 and the second connecting column 3 are further provided with guide-in surfaces 21, which have a certain flatness. In this embodiment, the first connecting column 2, the second connecting column 3 and the positioning column 4 all adopt a cylindrical shape, and the guide-in surfaces 21 are provided with two symmetrical surfaces, which can guide and position the first connecting column 2 and / or the second connecting column 3 when the first connecting column 2 and the second connecting column 3 are connected with the card mouth of the frame body, so as to quickly guide the first connecting column 2 and / or the second connecting column 3 into the opening of the card mouth. When the first connecting column 2 and / or the second connecting column 3 are engaged with the card mouth, the guide-in surfaces 21 can abut against the inner wall of the card mouth, so as to limit the rotation of the seat body 1 around the axis of the first connecting column 2 or the second connecting column 3.

[0032] In combination Figure 3 The first connecting column 2 and the second connecting column 3 have the same structure and both include a main body part 22 and an extension part 23 connected with the main body part 22. The main body part 22 is connected with the side wall of the seat body 1, and the extension part 23 extends outward from one end of the main body part 22. The diameter of the extension part 23 gradually decreases from one end of the main body part 22 outward, so as to have a frustum shape.

[0033] The seat body 1 is further provided with a mounting groove 121 at one end surface, and the mounting groove 121 is provided with a mounting hole 122. The mounting groove 121 is used for mounting a gear assembly, and the mounting hole 122 is used for penetrating a transmission shaft and engaging with the gear assembly. The seat body 1 is provided with a plurality of first vertical reinforcing ribs 5, second vertical reinforcing ribs 6 and horizontal reinforcing ribs 7 on the opposite surface of the mounting groove 121. The first vertical reinforcing ribs 5 are arranged on the first base 11 and along the length of the first base 11, and one end of the first vertical reinforcing ribs 5 extends toward the second base 12. The second vertical reinforcing ribs 6 are arranged on the second base 12 and along the length of the second base 12, and one end of the second vertical reinforcing ribs 6 extends toward the first base 11. The horizontal reinforcing ribs 7 are arranged on the second base 12 and along the width direction of the second base 12, and one end of the horizontal reinforcing ribs 7 is connected to the groove wall of the mounting groove 121.

[0034] The box body structure adopts flame-retardant PC injection molding, which has flame retardance and effectively reduces the weight. When connected with the frame body, the first connecting column 2 and the second connecting column 3 are clamped into the card mouth, and the positioning column 4 can also be connected with the corresponding card mouth or clamped with other external components. When the box body is disassembled, it only needs to be forced to separate the clamping of the box body, or to drive the box body to move horizontally, so that the opening of the card mouth is aligned with the area of the extension part 23. Since the diameter of the extension part 23 gradually decreases, it can quickly disengage the clamping of the card mouth, replacing the traditional fastener connection mode, so as to improve the disassembly efficiency of the box body.

[0035] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: all equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A fire retardant plastic gear case structure, characterised in that, The utility model relates to a kind of seat body (1), the seat body (1) is equipped with first connecting column (2) and second connecting column (3) in the installation slot (121) of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides of the two sides ​ ​ ​ ​ ​ 2. A fire retardant plastic gear case structure as claimed in claim 1, wherein, ​ 3. A fire retardant plastic gear case structure as claimed in claim 1, wherein, ​ ​ ​ 4. A fire retardant plastic gear case structure as claimed in claim 3, wherein, ​ 5. A fire retardant plastic gear case structure as claimed in claim 2, wherein, ​ 6. A fire retardant plastic gear case structure as claimed in claim 1, wherein, ​ 7. A fire retardant plastic gear case structure as claimed in claim 6 wherein, ​

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