Gearbox oil injection structure of electric tool

Abstract

The utility model discloses a gear box oil injection structure of an electric tool, which comprises a gear box with an oil injection hole and a blocking piece in threaded connection with the oil injection hole, the blocking piece is provided with a limiting section and a connecting section in threaded connection with the oil injection hole, and shells which are arranged in half and fixedly connected through screws are installed outside the gear box. The shell is provided with a dismounting hole corresponding to the oil injection hole in position, and the limiting section of the blocking piece can be hidden in the dismounting hole. Compared with the prior art, the electric tool has the advantages that the dismounting hole for dismounting the blocking piece in a threaded mode is formed in the shell, so that the space needed for dismounting the blocking piece is small, it is guaranteed that the gearbox is protected and wrapped by the shell, dismounting of the blocking piece can be facilitated, and after the electric tool leaves a factory, the electric tool can be conveniently disassembled and assembled. A user adds or replaces lubricating oil in the gear box; and the limiting section of the blocking piece is hidden in the dismounting hole, so that the stable installation of the gear box in the shell can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric tool technical field relates to electric tool gear box, especially electric tool gear box oil injection structure of the gear box. BACKGROUND

[0002] Electric tool gear box is a key transmission component in electric tool, usually is the box structure that is made of a series of gears, changes the rotational speed and torque of electric tool motor output through transmission power to meet the requirement of electric tool performance under different working scenes.

[0003] To ensure that the gear set in the gear box can supplement or replace lubricating oil, an oil injection hole is usually provided on the gear box, and the oil injection hole is blocked by a blocking piece. However, the gear box is clamped and wrapped by the shell of the electric tool, so that when the lubricating oil in the gear box is added or replaced after the electric tool is shipped, the shell needs to be removed in advance, and then the lubricating oil in the gear box is added or replaced. After the lubricating oil is added or replaced, the shell is assembled back to the gear box, which makes the operation of adding or replacing the lubricating oil in the gear box more troublesome.

[0004] Or part as the patent of a kind of electric tool for speed-changing planetary gear box with announcement number CN213981938U provides, wherein the blocking piece is provided with a connecting segment that is fixedly connected with the gear box and can be bent and deformed. Usually, to ensure the protection of the gear box by the shell, the shell has a small hollow part that can expose the gear box. If the shell that wraps the gear box of the patent is provided with a hollow part corresponding to the blocking piece, it will make the space required for plugging and unplugging the blocking piece larger, resulting in a larger hollow part and a decrease in the protection of the gear box. UTILITY MODEL CONTENTS

[0005] The utility model solves the problem of adding or replacing lubricating oil in the gear box of the existing electric tool after it is shipped or the decrease in the protection of the gear box by the shell when the blocking piece of the oil injection hole is exposed. The technical problem to be solved by the utility model is to provide a gear box oil injection structure of an electric tool that ensures the protection of the gear box by the shell and facilitates the addition or replacement of lubricating oil in the gear box.

[0006] The technical solution adopted by the utility model to solve the above technical problem is as follows: a gear box oil injection structure of an electric tool, comprising a gear box provided with an oil injection hole, and a blocking piece detachably installed in the oil injection hole.

[0007] The blocking piece is provided with a connecting segment and a limiting segment, and the connecting segment is threadedly connected with the oil injection hole.

[0008] The gear box is externally provided with a shell that is halved and fixedly connected by screws, and the shell is provided with a disassembly hole corresponding to the position of the oil injection hole. The limiting segment of the blocking piece can be hidden in the disassembly hole.

[0009] The further preferred scheme of the utility model is that a gasket one is sleeved on the connecting section, the gasket one is annular closed structure, and the gasket one adopts silica gel or rubber or metal material.

[0010] The further preferred scheme of the utility model is that a gasket two with elastic structure is sleeved on the connecting section, the outer dimension of the limiting section is greater than the outer dimension of the connecting section, the gasket two is located between the gasket one and the limiting section, and the gasket two adopts spring gasket.

[0011] The further preferred scheme of the utility model is that a boss with the oil injection hole is arranged on the gear box, when the plug screw thread is connected with the oil injection hole, the gasket one is attached on the boss, and the connecting section or the connecting section and the gasket one plug the oil injection hole.

[0012] The further preferred scheme of the utility model is that the shell comprises two half shells, and the two half shells clamp the gear box and are fixed through screws.

[0013] The further preferred scheme of the utility model is that the dismounting hole is arranged on the two half shells or any one half shell.

[0014] The further preferred scheme of the utility model is that the connecting section is connected to one end of the limiting section, and an acting groove is arranged on the other end of the limiting section.

[0015] The further preferred scheme of the utility model is that the acting groove is in cross shape or polygonal structure.

[0016] Compared with the prior art, the utility model has the advantages that in order to facilitate the installation of the shell wrapped on the gear box, the shell is usually arranged in half, the half-arranged shell is fixed and connected through screws, the dismounting hole for screwing and dismounting the plug is arranged on the shell, so that the space required for operating the plug is small, the shell can protect and wrap the gear box, the plug can be conveniently dismounted, the user can add or replace the lubricating oil in the gear box after the electric tool is delivered, the limiting section of the plug is hidden in the dismounting hole, and the stable installation of the gear box in the shell is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model will be further described in detail below in combination with the drawings and preferred embodiments, but the person skilled in the art will appreciate that these drawings are only drawn for the purpose of explaining the preferred embodiments, and therefore should not be regarded as the limitation to the scope of the utility model, and in addition, the drawings only schematically show the composition or structure of the described object conceptually and can contain exaggerated display, and the drawings are not necessarily drawn to scale, unless specifically indicated.

[0018] Figure 1The utility model discloses a mechanism schematic diagram of electric tool shell wrapping gear box for preferred embodiment of the utility model,

[0019] Figure 2 The utility model discloses an explosion drawing of electric tool shell and gear box for preferred embodiment of the utility model,

[0020] Figure 3 The utility model discloses a structure schematic diagram of half shell of setting dismounting hole for preferred embodiment of the utility model,

[0021] Figure 4 The utility model discloses a structure schematic diagram of plugging piece for preferred embodiment of the utility model.

[0022] In the drawing: 1, shell, 1a, half shell, 11, dismounting hole, 12, stop column;2, gear box, 21, oil hole, 22, boss;3, plugging piece, 31, connecting section, 32, limiting section, 33, action groove;4, washer one;5, washer two. DETAILED DESCRIPTION

[0023] The preferred embodiments of the utility model will be described in detail below with reference to the drawings, and those skilled in the art will appreciate that these descriptions are only descriptive, exemplary, and should not be interpreted as limiting the protection scope of the utility model.

[0024] It should be noted that: similar signs represent similar items in the following drawings, so once an item is defined in one drawing, it can not be further defined and explained in the subsequent drawings.

[0025] This embodiment mainly describes the gear box oiling structure of electric tool which ensures the protection of the shell to the gear box and facilitates the addition or replacement of lubricating oil in the gear box, and specifically as follows:

[0026] As shown in Figures 1-4 The gear box oiling structure of electric tool includes a shell 1, a gear box 2 installed in the shell 1 and provided with an oil hole 21, and a plugging piece 3 for plugging the oil hole 21. In this embodiment, a dismounting hole 11 is formed in the shell 1, the position of the dismounting hole 11 is aligned with the oil hole 21, the plugging piece 3 is provided with a connecting section 31 and a limiting section 32 connected at one end, the plugging piece 3 is inserted into the dismounting hole 11, the connecting section 31 of the plugging piece 3 is threadedly connected in the oil hole 21, the limiting section 32 is provided with an outer dimension larger than that of the connecting section 31, and the limiting section 32 is hidden in the dismounting hole 11.

[0027] Preferably, the hidden design of the limiting section 32 of the plugging piece 33 in the dismounting hole 11 can effectively prevent oil leakage caused by accidental touch of the plugging piece 33.

[0028] In order to facilitate the threaded disassembly of the plugging piece 33, the limiting section 32 is provided with an action groove 33 in a cross or polygonal structure at the end away from the connecting section 31, and the plugging piece 33 can be threaded disassembled by borrowing a screwdriver or the like.

[0029] In the present application, the threaded disassembly hole 11 for the plugging piece 33 is provided on the shell 1, so that the space required for the operation of the plugging piece 33 is small, and the shell 1 can protect the gear box 2 while facilitating the disassembly of the plugging piece 33, facilitating the addition or replacement of lubricating oil in the gear box 2 by the user after the electric tool is shipped; and the hidden arrangement of the limiting section 32 of the plugging piece 33 in the threaded disassembly hole 11 can also improve the stable installation of the gear box 2 in the shell 1.

[0030] As shown in Figures 2-4 The limiting section 32 is sleeved with a gasket one 4 and a gasket two 5, the gasket one 4 is in a ring-shaped closed structure, and the gasket two 5 has an elastic structure, the gasket two 5 is located between the gasket one 4 and the limiting section 32, preferably, the gasket one 4 can be made of silica gel or rubber or metal material, and the gasket two 5 can be made of a spring washer, and the arrangement of the gasket one 4 and the gasket two 5 can effectively reduce the loosening influence of the vibration of the electric tool during operation on the plugging piece 3.

[0031] In the present embodiment, the gear box 2 is provided with a boss 22, the boss 22 can be attached to the inner wall of the shell 1, and the oil injection hole 21 is provided on the boss 22, when the plugging piece 33 is threaded connected to the oil injection hole 21, the gasket one 4 is attached to the boss 22, and the connecting section 31 or the connecting section 31 and the gasket one 4 block the oil injection hole 21.

[0032] As shown in Figures 2-3 The shell 1 includes two half shells 1a that can be fixedly connected by screws, and the two half shells 1a are fixedly connected to the gear box 2 by screws, the half arrangement of the shell 1 facilitates the wrapping of the shell 1 around the gear box 2, and the half arrangement of the shell 1 is fixedly connected by screws, the plugging piece 33 can be directly made of screws or bolts or screws, the inner diameter size of the threaded disassembly hole 11 for hiding the plugging piece 33 is not much different from the inner diameter size of the hole for hiding the screw, so that the space required for the operation of the plugging piece 33 is small, and the shell 1 can protect the gear box 2.

[0033] The threaded disassembly hole 11 is usually provided on one half shell 1a, the inner wall of the half shell 1a is provided with a stop post 12, and the threaded disassembly hole 11 is provided through the stop post 12, and when the shell 1 wraps around the gear box 2, the end of the stop post 12 is attached to the boss 22 of the gear box 2, so that the gasket one 4 and the gasket two 5 can be detached from the threaded disassembly hole 11 when the plugging piece 33 is disassembled, and the plugging piece 33, the gasket one 4 and the gasket two 5 can be directly made of common combination screws on the market.

[0034] In other embodiments, the disassembly hole 11 can also be partially formed on the two half shells 1a, and the complete disassembly hole 11 can be formed after the two half shells 1a are combined and fixed.

[0035] In the description of the utility model, it is necessary to explain that the terms "upper", "lower", "front", "rear", "inner", "outer" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship commonly placed when the utility model product is used, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0036] The gear box oil injection structure of the electric tool provided by the utility model is described in detail above, the principle and implementation mode of the utility model are described in this paper by applying specific examples, and the above embodiment description is only for helping to understand the utility model and core idea, and it should be pointed out that, for ordinary skilled persons in the technical field, some improvements and modifications can be made to the utility model without departing from the principle of the utility model, and these improvements and modifications also fall within the protection scope of the utility model claims.

Claims

1. A gear box oil injection structure of an electric tool, comprising a gear box with an oil injection hole, and a plug member detachably installed in the oil injection hole. characterized in that The plug member is provided with a connecting section and a limiting section, and the connecting section is threadedly connected with the oil injection hole. An outer shell is installed on the gear box, and the outer shell is provided with a dismounting hole corresponding to the position of the oil injection hole.

2. The gear case oiling structure of the power tool according to claim 1, characterized by, A gasket one is sleeved on the connecting section, and the gasket one is annularly closed, and the gasket one is made of silica gel or rubber or metal.

3. The gear case oiling structure of the power tool according to claim 2, characterized by, A gasket two with elastic structure is sleeved on the connecting section, and the outer dimension of the limiting section is larger than that of the connecting section, and the gasket two is located between the gasket one and the limiting section, and the gasket two is a spring gasket.

4. The gear case oiling structure of the power tool according to claim 3, characterized by, A boss provided with the oil injection hole is arranged on the gear box, and when the plug member is threadedly connected with the oil injection hole, the gasket one is attached to the boss, and the connecting section or the connecting section and the gasket one seal the oil injection hole.

5. The gear case oiling structure of the power tool according to claim 1, wherein The outer shell comprises two half shells, and the two half shells are clamped on the gear box and are fixed by screws.

6. The gear case oiling structure of the power tool according to claim 5, wherein The dismounting hole is arranged on the two half shells or any one half shell.

7. The gear case oiling structure of the power tool according to claim 1, wherein The connecting section is connected to one end of the limiting section, and an acting groove is arranged on the other end of the limiting section.

8. The gear case oiling structure of the power tool according to claim 7, wherein The acting groove is in cross shape or polygonal shape.

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