CN-122003196-A - Rotary brush tool

Abstract

The invention relates to a rotary brush tool having a brush assembly (1, 2, 3) and a drive device (1, 4) having a drive housing (1) and an output shaft (4) for the brush assembly (1, 2, 3). The brush assembly (1, 2, 3) has a rotatably driven brush holder (1) and an annular brush (2, 3) having a bristle ring with outwardly projecting bristles (3). According to the invention, the drive housing (1) of the drive device (1, 4) serves as a brush holder (1) which is rotatably driven relative to a fixed output shaft (4).

Inventors

• S.H.J . hofst

Assignees

• 蒙蒂工具有限公司

Dates

Publication Date

20260508

Application Date

20240826

Priority Date

20230929

Claims (10)

1. 1. A rotary brush tool having a brush assembly (1, 2, 3) and a drive device (1, 4) having a drive housing (1) and an output shaft (4) for the brush assembly (1, 2, 3), wherein the brush assembly (1, 2, 3) has a rotatably driven brush holder (1) and an annular brush (2, 3) having a bristle ring with outwardly protruding bristles (3), characterized in that the drive housing (1) of the drive device (1, 4) serves as the brush holder (1) which is rotatably driven with respect to the fixed output shaft (4).
2. 2. A rotary brush tool according to claim 1, characterized in that the drive means (1, 4) are configured as an electric motor (1, 4) with a cylindrical drive housing (1).
3. 3. A rotary brush tool according to claim 1 or 2, characterized in that the ring brush (2, 3) has a brush band (2) to which bristles (3) protruding outwards are attached.
4. 4. A rotary brush tool according to any of claims 1-3, characterized in that the brush belt (2) is placed over the drive housing (1), optionally with an annular adapter (5) connected in between.
5. 5. A rotary brush tool according to any of claims 1-4, characterized in that a support (6) is provided, to which the output shaft (4) is connected at least on one side, and which support is preferably additionally provided with stop means (7) immersed in the rotary bristle ring.
6. 6. A rotary brush tool according to claim 5, characterized in that a handle (8) is connected to the holder (6) which can be swung relative to the holder (6).
7. 7. A rotary brush tool according to claim 6, characterized in that the handle (8) carries the drive means (1, 4) together with the annular brush (2, 3).
8. 8. A rotary brush tool according to claim 7, characterized in that the drive means (1, 4) and the ring brush (2, 3) are arranged coaxially with the rotational axis (a) of the handle (8).
9. 9. A rotary brush tool according to any of claims 5-8, characterized in that the holder (6) is supported on the foot side on the surface to be treated.
10. 10. A rotary brush tool according to any of claims 5-9, characterized in that the holder (6) is connected to an operating element (10) movable relative to the surface (a), such as a robot arm, a rotary unit for inner tube handling or the like.

Description

Rotary brush tool Technical Field The invention relates to a rotary brush tool having a brush assembly and a drive device having a drive housing and an output shaft for driving the brush assembly, wherein the brush assembly has a rotatably driven brush holder and an annular brush having bristle rings with outwardly projecting bristles. Background With such rotary brush tools, the metal surface is typically treated to remove rust or dirt. In practice, the surface can be adjusted to a specific roughness by means of bristles. For this purpose, there are various solutions proposed by the applicant in the prior art, as described in detail in EP 1 834 733 B1 or WO 2012/038537 A1. Within the scope of the application, EP 4 238 451 A1 is taken as starting point for the prior art for the formation of classes. The rotary brush tool provided in this prior art is for this purpose equipped with a machine housing and a drive unit accommodated therein or a drive for the brush assembly. The drive means may in principle be a pneumatic drive or an electric drive. When an electromotive drive with a drive housing and an output shaft is used, the rotational movement of the output shaft is reversed by a reversing gear of more or less complex design to the brush holder which can be driven in rotation thereby. This results in a relatively bulky overall structure. The present invention aims to improve this. Disclosure of Invention The technical problem on which the invention is based is that such rotary brush tools are further developed such that, while taking into account a compact structure, an implementation with reduced overall costs is achieved. In order to solve this problem, the invention proposes, starting from a rotary brush tool of the generic type, that the drive housing of the drive device be used as a brush carrier which is rotatably driven relative to a stationary output shaft. According to the invention, a special rotatably driven brush holder is used first. As the drive housing of the drive assumes its function. The invention is based on the recognition that drives for such rotary brush tools are generally equipped with an electric drive having a drive housing and an output shaft. Within the scope of the invention, the output shaft is now not used to drive the rotatably driven brush holder, but rather the drive housing itself serves as the rotatably driven brush holder. For this purpose, only the output shaft of the electric drive has to be fixed. This can be done, for example, in a stand. By fixing the output shaft of the electric drive, the invention achieves that the drive housing is conversely brought into a rotational state. I.e. the drive housing rotates relative to the fixed output shaft or the fixed output shaft holder. As described above, the driving device is generally configured as an electric motor. Such motors mostly have a cylindrical drive housing which, according to the invention, assumes the function of a rotatably driven brush holder. In practice, the annular brush is in this case equipped with a brush belt, to which bristles projecting outwards are attached. The brush strip may be a braid strip made of plastic, in particular polyamide. The bristles are usually formed as U-shaped steel bristles which are inserted into or through the brush belt. Whereby the bristles form a bristle ring. The bristle ring can be provided intermittently or uninterrupted. The brush belt of the annular brush is therefore designed in a cylindrical or annular shape, wherein the inner diameter of the brush belt generally corresponds to the outer diameter of the drive housing. The brush belt can thus be placed over the drive housing. If the inner diameter of the brush belt exceeds the inner diameter of the drive housing, an annular adapter can also be used if necessary. That is, in this case, the brush belt is fitted over the drive housing with the above-described ring adapter interposed therebetween. The ring adapter can be adapted to both the brush belt and the drive housing of the motor in its thickness. Furthermore, there is the additional possibility that the ring adapter is made of a thermally conductive material, for example a thermally conductive plastic. In addition, it has proven to be advantageous in this case if the ring adapter is provided with axial webs which each extend in the axial direction of the drive housing. That is, in this case, the axial webs assume the holding function of the annular brush belt or serve for additional fastening by means of their axial overlap brush belt. In this way, a gap is formed between the axial web and the brush strip, through which gap the heat that may be generated can be dissipated. Furthermore, the axial tab allows the brush belt to have a certain (and desired) deformation when the surface is treated. Such deformations are additionally observed when a stop device immersed in the rotating bristle field is provided, as described in principle in the prior art of EP 1 834 733 B