Replaceable main shaft structure of electric tool

Abstract

The utility model discloses a replaceable main shaft structure of an electric tool, and relates to the technical field of auxiliary tools of electric tools. According to the technical scheme, one end of the mandrel is coaxially connected with an output shaft through a connecting sleeve, the outer side of the output shaft is sleeved with a protective shell, the protective shell is fixedly connected with the machine shell, at least two bearings are arranged in the protective shell, the output shaft penetrates through all the bearings in the protective shell, and a connector is arranged at the end, away from the mandrel, of the output shaft. The grinding machine has the advantages that a user is allowed to replace spindles with different lengths to adapt to grinding working conditions with different depths, and meanwhile, the connecting precision and the transmission precision can be effectively guaranteed by connecting through the connecting sleeve.

Description

Technical Field

[0001] The utility model relates to the technical field of electric tool auxiliary tools, in particular to a replaceable spindle structure of an electric tool. Background Art

[0002] There are various types of power tools, one of which is mainly used for cutting and grinding, such as angle grinders, which are handheld power tools that use fiberglass for cutting and grinding. They are mainly used for cutting, grinding and brushing metal and stone. The head of the current angle grinder cannot be replaced, and it can only be used as an angle grinder alone. The power tools that belong to the same category as angle grinders, such as polishers, sanders, straight grinders, etc., have similar output structures and output power when used.

[0003] There are many structures that need to be considered during improvement, such as whether the installed structure is simple, whether disassembly and assembly are convenient, whether the transmission is reliable, and other technical problems. For example, the patent with publication number CN213859100U discloses an electric tool that realizes the function of quick replacement by setting a first annular groove, a second annular groove, a first tooth groove, and a second tooth groove, and then using steel balls for corresponding clamping.

[0004] However, during use, the steel balls and limit ribs will wear out after repeated use, which will affect the stability of transmission. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a replaceable spindle structure for an electric tool, which has the advantages of using a specific structure for connection to achieve different functions while maintaining the existing structure, and also ensuring connection accuracy.

[0006] The above-mentioned purpose of the utility model is achieved through the following technical solutions:

[0007] A replaceable spindle structure for an electric tool comprises a housing, a rotor and a stator are arranged inside the housing, the stator is sleeved outside the rotor, and the rotor is characterized in that a core shaft is inserted into the rotor, one end of the core shaft is rotatably connected to the housing, and the other end of the core shaft passes through the housing;

[0008] One end of the core shaft is coaxially connected to the output shaft through a connecting sleeve, a protective shell is provided on the outer side of the output shaft, the protective shell is fixedly connected to the casing, at least two bearings are provided in the protective shell, the output shaft passes through all the bearings in the protective shell, and a connector is provided at one end of the output shaft away from the core shaft.

[0009] In a preferred example, the utility model can be further configured as follows: the connector is connected to a main shaft, and a spring clamp is provided on a side of the main shaft away from the connector.

[0010] In a preferred example, the utility model can be further configured as follows: a clamp nut is threadedly connected to the outer side of the spring clamp.

[0011] In a preferred example, the present invention can be further configured as follows: the housing and the protective shell are both half-shell splicing structures.

[0012] In a preferred example, the utility model can be further configured as follows: a slot is provided in the protective shell, and the bearing is clamped in the slot.

[0013] In summary, the present invention includes at least one of the following beneficial technical effects:

[0014] 1. Allow users to replace spindles of different lengths to adapt to grinding conditions of different depths, and the connection through the connecting sleeve can effectively ensure the connection accuracy;

[0015] 2. The front end structure of the spindle can be specially designed so that the electric grinding machine can achieve different functions by replacing the spindle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the internal structure of this technical solution.

[0017] Figure numerals: 1, housing; 2, rotor; 3, stator; 4, core shaft; 5, connecting sleeve; 6, output shaft; 7, protective shell; 8, bearing; 9, connecting head; 10, main shaft; 11, spring chuck; 12, chuck nut; 13, working head. DETAILED DESCRIPTION

[0018] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0019] like Figure 1 As shown, a replaceable spindle 10 structure of an electric tool disclosed in the technical solution includes a housing 1, a rotor 2 and a stator 3 are arranged inside the housing 1, the stator 3 is sleeved on the outside of the rotor 2, a core shaft 4 is inserted into the rotor 2, one end of the core shaft 4 is rotatably connected to the housing 1, and the other end of the core shaft 4 passes through the housing 1; for components not described such as the motor, existing technologies are used, and the technical solution shows modified structures.

[0020] One end of the mandrel 4 is coaxially connected to the output shaft 6 through a connecting sleeve 5. The connecting sleeve 5 here needs to ensure the processing accuracy and ensure that the mandrel 4 and the output shaft 6 are coaxially arranged. A protective shell 7 is provided on the outer side of the output shaft 6. The protective shell 7 is fixedly connected to the housing 1, and the two can also be arranged as one. At least two bearings 8 are provided in the protective shell 7, and two bearings 8 are shown in the figure. The provided bearings 8 can ensure the rotation of the output shaft 6 on the one hand, and can assist in ensuring the coaxiality of the output shaft 6 on the other hand. The output shaft 6 runs through all the bearings 8 in the protective shell 7, and a connector 9 is provided at the end of the output shaft 6 away from the mandrel 4. The provided connector 9 can be connected to different spindles 10 to adapt to grinding conditions of different depths.

[0021] The connector 9 is connected to the main shaft 10, and the connection between the two is detachable, such as a clamping or threaded connection. A spring chuck 11 is provided on the side of the main shaft 10 away from the connector 9, and the two are detachably connected. The spring chuck 11 can fix different working heads 13 to achieve different functions. The outer side of the spring chuck 11 is threadedly connected with a chuck nut 12, and the chuck nut 12 can be used to fix the spring chuck 11 to prevent the working head 13 from shaking.

[0022] The housing 1 and the protective shell 7 are both half-shell splicing structures, which are convenient for cleaning the interior and designing corresponding structures. A card slot is provided in the protective shell 7, and the bearing 8 is snapped into the card slot. The setting of the card slot can help fix the position of the bearing 8 and ensure the coaxiality of the device.

[0023] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A replaceable spindle structure for an electric tool, comprising a housing (1), wherein a rotor (2) and a stator (3) are arranged inside the housing (1), wherein the stator (3) is sleeved on the outer side of the rotor (2), wherein: A core shaft (4) is inserted into the rotor (2), one end of the core shaft (4) is rotatably connected to the casing (1), and the other end of the core shaft (4) passes through the casing (1); One end of the core shaft (4) is coaxially connected to an output shaft (6) via a connecting sleeve (5); a protective shell (7) is provided on the outer side of the output shaft (6); the protective shell (7) and the housing (1) are fixedly connected; at least two bearings (8) are provided in the protective shell (7); the output shaft (6) passes through all the bearings (8) in the protective shell (7); and a connector (9) is provided at one end of the output shaft (6) away from the core shaft (4).

2. The replaceable spindle structure of an electric tool according to claim 1, characterized in that: The connecting head (9) is connected to a main shaft (10), and a spring clamp (11) is provided on the side of the main shaft (10) away from the connecting head (9).

3. The replaceable spindle structure of an electric tool according to claim 2, characterized in that: The outer side of the spring clamp (11) is threadedly connected with a clamp nut (12).

4. The replaceable spindle structure of an electric tool according to claim 1, characterized in that: The housing (1) and the protective housing (7) are both half-shell spliced ​​structures.

5. The replaceable spindle structure of an electric tool according to claim 1, characterized in that: A slot is provided in the protective shell (7), and the bearing (8) is snap-connected in the slot.

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