A polishing driving mechanism and a wire drawing and deburring combined machine

Abstract

The utility model provides a kind of polishing drive mechanism and wire drawing deburring compound machine, it includes: assembly box, the bottom plate of assembly box is equipped with multiple connecting through holes;Closed box, multiple closed boxes are respectively outer around multiple connecting through holes to be arranged to separate out sealed cavity and connecting cavity in assembly box;Drive assembly, it includes rotating electrical machine, drive shaft, flange and belt pulley, rotating electrical machine is set in sealed cavity, drive shaft connects rotating electrical machine, flange and belt pulley are all set in drive shaft, flange is located in sealed cavity, and belt pulley is located in connecting cavity.The utility model separates out sealed cavity and multiple connecting cavities by the structure cooperation between assembly box and closed box, rotating electrical machine is located in sealed cavity, and belt pulley is located in connecting cavity, thereby avoid the contact of polishing slag after escaping and rotating electrical machine.Compared with conventional polishing technique, the present application has the advantages of flexible use, long service life, high safety and stable operation process.

Description

Technical Field

[0001] This utility model relates to the field of grinding equipment technology, specifically to a grinding drive mechanism and a wire drawing and deburring composite machine. Background Technology

[0002] In the field of wire drawing, deburring, and polishing, the commonly used method currently employs an electric motor as the power source. The motor's rotational kinetic energy is transmitted to the polishing roller brush via a belt drive mechanism, causing the brush to rotate at high speed and contact the surface of the workpiece. This achieves wire drawing, deburring, and polishing. Due to its simple structure and direct power transmission, this technology is widely used in surface treatment processes across various industries, including metal processing and plastic parts handling, and can meet basic polishing requirements.

[0003] However, the aforementioned existing technologies have significant defects and shortcomings in practical applications. The core problem lies in the dispersion of slag generated during the rotation of the grinding roller, leading to a series of adverse consequences. Specifically, when the grinding roller rotates at high speed and rubs against the workpiece, it generates a large amount of metal shavings, plastic residues, or dust. Due to the lack of effective shielding and collection structures in existing equipment, this slag will disperse in all directions under the centrifugal force of the rotating roller. The dispersed slag will first contaminate the motor, which serves as the power source. Some fine slag will adhere to the surface of the motor casing and heat dissipation holes, hindering heat dissipation and reducing motor operating efficiency. Even worse, slag can enter the motor through gaps and adhere to critical components such as the rotor and stator, accelerating component wear, causing abnormal motor noise, unstable speed, and other malfunctions, severely shortening the motor's lifespan and increasing maintenance costs.

[0004] In addition, the spillage of slag poses a significant safety hazard. If metal slag comes into contact with live parts of the motor, it may cause a short circuit or even a fire in the motor, which poses a great threat to the personal safety of operators and the production environment of the workshop.

[0005] In summary, the problem of slag dispersion caused by the rotation of the roller brush in existing wire drawing, deburring and grinding technologies has not been effectively solved. It has become a key bottleneck affecting equipment stability, operational safety and environmental friendliness, and there is an urgent need for a technical solution that can protect the motor and eliminate safety hazards. Utility Model Content

[0006] Therefore, the technical problem to be solved by this utility model is to overcome the problems of grinding residue affecting motor use and posing safety hazards in the prior art, and to provide a grinding drive mechanism and a wire drawing and deburring composite machine.

[0007] To solve the above-mentioned technical problems, this utility model provides a grinding drive mechanism, comprising: an assembly box, the bottom plate of which has multiple connecting holes communicating with the external environment; multiple enclosed boxes, which are disposed in the assembly box and respectively arranged around the multiple connecting holes to separate a sealing cavity and multiple connecting cavities inside the assembly box, wherein the multiple connecting cavities are located inside the enclosed boxes and the sealing cavity is located outside the enclosed boxes; and multiple drive components, which are all connected inside the assembly box and are arranged in a one-to-one correspondence with the multiple enclosed boxes. Each drive component includes a rotary motor, a drive shaft, a flange, and a pulley. The rotary motor is disposed in the sealing cavity. One end of the drive shaft is connected to the power output end of the rotary motor, and the other end passes through the interior of the enclosed box. The flange and the pulley are both sleeved on the drive shaft. The flange is located in the sealing cavity and abuts against the side wall of the enclosed box. The pulley is located in the connecting cavity and is connected to an external transmission belt.

[0008] In one embodiment of the present invention, a plurality of drive components are arranged at intervals along the length of the assembly box, and two adjacent drive components are installed in opposite directions.

[0009] In one embodiment of the present invention, the enclosed box includes a box body and a cover plate. The box body is connected to the assembly box, and the cover plate is disposed on the side of the box body away from the drive component and is detachably connected to the box body.

[0010] In one embodiment of the present invention, the assembly box further includes a top plate and a side plate. The two ends of the closed box in the height direction are respectively connected to the top plate and the bottom plate. The side plate is arranged around the edges of the top plate and the bottom plate and is detachably connected to the top plate and the bottom plate respectively.

[0011] In one embodiment of the present invention, the top plate is provided with an external connection part in the middle, and an external rotation drive device is rotatably connected to the external connection part to drive the assembly box to move.

[0012] In one embodiment of the present invention, the assembly box further includes a plurality of support beams, all of which extend along the height direction of the assembly box, and both ends of the support beams are respectively connected to the top plate and the bottom plate, and the side plate is detachably connected to the support beams by means of a disassembly component.

[0013] In one embodiment of the present invention, the drive assembly further includes a mounting bracket connected to the base plate, and the rotary motor is mounted on the mounting bracket.

[0014] In one embodiment of the present invention, the drive assembly includes at least two pulleys spaced apart on the drive shaft.

[0015] In one embodiment of the present invention, the grinding drive mechanism further includes a control component, and the plurality of drive components are respectively connected to the control component.

[0016] This utility model also provides a wire drawing and deburring composite machine, which includes the above-mentioned grinding drive mechanism, grinding roller brush and transmission belt. One end of the transmission belt is sleeved on the pulley of the grinding drive mechanism, and the other end passes through the connecting through hole of the grinding drive mechanism and is connected to the grinding roller brush.

[0017] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art: The grinding drive mechanism and wire drawing / deburring composite machine described in this utility model separate a sealed cavity and multiple connecting cavities through the structural cooperation between the assembly box and the closed box. The rotary motor is located in the sealed cavity, and the pulley is located in the connecting cavity, thereby preventing grinding debris from contacting the rotary motor after it escapes. In this process, the flange not only improves the working stability of the drive component, but also further seals the assembly gaps. Compared with the current conventional grinding technology, this application has significant advantages such as flexible use, long service life, high safety, and stable operation. Attached Figure Description

[0018] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0019] Figure 1 This is a three-dimensional structural diagram of the grinding drive mechanism in a preferred embodiment of the present invention; Figure 2 yes Figure 1 A three-dimensional structural schematic diagram of the grinding drive mechanism from another perspective. Figure 3 yes Figure 1 The diagram shows the internal structure of the grinding drive mechanism. Figure 4 yes Figure 1 A three-dimensional structural diagram of the base plate, enclosed box, and drive assembly in the grinding drive mechanism shown. Figure 5 yes Figure 1 The diagram shows a three-dimensional structural schematic of the drive component in the grinding drive mechanism.

[0020] Explanation of reference numerals in the accompanying drawings: 100, Assembly box; 110, Base plate; 111, Connecting through hole; 120, Top plate; 121, External connection part; 130, Side plate; 140, Support beam; 150, Disassembly / assembly part; 200, Enclosed box; 210, Box body; 220, Cover plate; 300, Drive assembly; 310, Mounting bracket; 320, Rotary motor; 330, Drive shaft; 340, Flange; 350, Pulley. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0022] Example 1:

[0023] See Figures 1 to 4 As shown, this embodiment provides a grinding drive mechanism, which includes: an assembly box 100, the base plate 110 of the assembly box 100 having a plurality of connecting through holes 111 communicating with the external environment; a plurality of enclosed boxes 200, the plurality of enclosed boxes 200 being disposed in the assembly box 100 and respectively surrounding the plurality of connecting through holes 111, so as to separate a sealing cavity and a plurality of connecting cavities inside the assembly box 100, wherein the plurality of connecting cavities are respectively located inside the enclosed boxes 200, and the sealing cavity is located outside the enclosed boxes 200; and a plurality of drive components 300, the drive components 300 being all connected inside the assembly box 100 and connected to... Multiple enclosed boxes 200 are arranged one-to-one. Any drive assembly 300 includes a rotary motor 320, a drive shaft 330, a flange 340, and a pulley 350. The rotary motor 320 is disposed in the sealed cavity. One end of the drive shaft 330 is connected to the power output end of the rotary motor 320, and the other end passes through the interior of the enclosed box 200. The flange 340 and the pulley 350 are both sleeved on the drive shaft 330. The flange 340 is located in the sealed cavity and abuts against the side wall of the enclosed box 200. The pulley 350 is located in the connecting cavity and is connected to an external drive belt.

[0024] The grinding drive mechanism described in this embodiment separates a sealed cavity and multiple connecting cavities through the structural cooperation between the assembly box 100 and the closed box 200. The rotary motor 320 is located in the sealed cavity, and the pulley 350 is located in the connecting cavity, thereby preventing grinding debris from contacting the rotary motor 320 after it escapes. During this process, the flange 340 not only improves the working stability of the drive assembly 300 but also further seals assembly gaps. Compared with current conventional grinding technologies, this application has significant advantages such as flexible use, long service life, high safety, and stable operation.

[0025] In this embodiment, the assembly box 100 serves as the basic support and mounting frame for the entire grinding drive mechanism, providing a stable mounting base for all internal components such as the enclosed box 200 and the drive assembly 300. This ensures that each structure maintains a fixed relative position during operation, preventing vibration or displacement from affecting the mechanism's operational accuracy. Simultaneously, multiple connecting holes 111 on its base plate 110, communicating with the external environment, provide necessary channels for the connection between the drive assembly 300 and the external transmission structure, enabling the transmission of internal power to the external grinding components. Furthermore, the assembly box 100 also serves as the mounting carrier for the enclosed box 200, providing a structural foundation for the subsequent separation of the sealing cavity and connecting cavity, ensuring the internal spatial division and functional realization of the mechanism.

[0026] Furthermore, the assembly box 100 also includes a top plate 120 and a side plate 130. The two ends of the closed box 200 in the height direction are respectively connected to the top plate 120 and the bottom plate 110. The side plate 130 is arranged around the edges of the top plate 120 and the bottom plate 110, and is detachably connected to the top plate 120 and the bottom plate 110 respectively. The top plate 120 and the bottom plate 110 of the assembly box 100 are arranged opposite to each other, together forming the upper and lower support surfaces of the assembly box 100. The top plate 120 is connected to the top end of the closed box 200 in the height direction, and the bottom plate 110 is connected to the bottom end of the closed box 200 in the height direction. The two work together to fix the closed box 200 in both directions, preventing the closed box 200 from shifting or shaking in the height direction during the operation of the mechanism. This further ensures the stability of the separation between the sealing cavity and the connecting cavity by the closed box 200, and prevents the chamber seal from failing due to the displacement of the closed box 200. Side plates 130 are arranged around the edges of top plate 120 and bottom plate 110, forming circumferential protection and structural enclosure for assembly box 100. On the one hand, they can prevent impurities in the external environment from entering the internal cavity from the side of assembly box 100, thus enhancing the overall protection effect. On the other hand, side plates 130 are detachably connected to top plate 120 and bottom plate 110 respectively, which facilitates the assembly and disassembly of assembly box 100. During mechanism maintenance, side plates 130 can be removed to quickly access internal components such as closed box 200 and drive assembly 300, reducing maintenance difficulty. The assembly state of assembly box 100 can also be flexibly adjusted according to actual usage needs, improving the maintenance convenience and usage flexibility of the mechanism.

[0027] Specifically, the top plate 120 has an external connection part 121 in the middle, and an external rotation drive device is rotatably connected to the external connection part 121 to drive the assembly box 100 to move. The external rotation drive device can be configured as a robot, a rotation driver, a moving module, etc., and this utility model does not impose specific limitations on it.

[0028] Furthermore, the assembly box 100 also includes multiple support beams 140, all of which extend along the height direction of the assembly box 100. The two ends of each support beam 140 are connected to the top plate 120 and the bottom plate 110, respectively. The side plate 130 is detachably connected to the support beams 140 via a disassembly assembly 150. The support beams 140 effectively distribute the pressure borne by the top plate 120 and the bottom plate 110. Especially after components such as the enclosed box 200 and the drive assembly 300 are installed inside the assembly box 100, the support beams 140 prevent the top plate 120 from deforming due to uneven load distribution. Simultaneously, they prevent the bottom plate 110 from sinking under stress, affecting the alignment accuracy between the connecting through hole 111 and the external structure. This significantly improves the deformation resistance and overall stability of the entire assembly box 100, ensuring that the mechanism maintains structural rigidity during long-term high-frequency grinding operations. In addition, the support beam 140 provides a precise installation reference for the side plate 130. The side plate 130 is detachably connected to the support beam 140 through bolts, clips and other disassembly parts 150, rather than being directly connected to the edge of the top plate 120 and the bottom plate 110. This design can ensure the verticality and positional accuracy of the side plate 130 during installation through the positioning function of the support beam 140, and avoid gaps in the side plate 130 due to edge mating deviation.

[0029] In this embodiment, the enclosed box 200 is the core partition component of the internal space of the mechanism. By surrounding the connecting through-hole 111 within the assembly box 100, it divides the interior of the assembly box 100 into a sealed cavity and multiple connecting cavities. The connecting cavities are located inside the enclosed box 200, while the sealed cavities are located outside. This spatial division is crucial for achieving the mechanism's protective function. On one hand, the enclosed box 200 provides an independent connecting cavity for the pulley 350 located inside, making the connection between the pulley 350 and the external grinding environment more concentrated, facilitating the installation and operation of the drive belt. On the other hand, the sealed cavity formed by the enclosed box 200 and the assembly box 100 effectively isolates impurities such as slag and dust generated during the external grinding process, providing a clean working environment for the rotary motor 320 located within the sealed cavity and preventing impurities from intruding and affecting motor operation.

[0030] In this embodiment, the enclosed box 200 includes a box body 210 and a cover plate 220. The box body 210 is connected to the assembly box 100, and the cover plate 220 is disposed on the side of the box body 210 away from the drive component 300 and is detachably connected to the box body 210. Specifically, the box body 210 provides a circumferential enclosure for the internal connecting cavity, ensuring that the pulley 350 can operate stably in an independent space, and at the same time, it cooperates with the assembly box 100 to form an external sealed cavity to isolate grinding impurities. On the other hand, the box body 210 also provides an installation reference for the cover plate 220, and its side away from the drive component 300 has reserved an assembly position for the cover plate 220, laying a structural foundation for the subsequent detachable connection of the cover plate 220. The cover plate 220, as an openable and closable component of the enclosed box 200, is detachably installed on the side of the box body 210 away from the drive assembly 300. When it is necessary to inspect or replace the pulley 350, the end of the drive shaft 330, or the transmission belt in the connecting cavity, the cover plate 220 can be directly removed without disassembling the entire enclosed box 200 or the assembly box 100, which greatly reduces the difficulty of maintenance operations and shortens maintenance time. When the cover plate 220 is closed, it can form a complete enclosed space with the box body 210, further preventing external grinding slag and dust from entering the connecting cavity from the side of the box body 210, avoiding impurities from affecting the matching accuracy of the pulley 350 and the transmission belt, and at the same time preventing the transmission components in the connecting cavity from being exposed, thus improving the safety of the mechanism operation.

[0031] See Figure 5 As shown, in this embodiment, the drive assembly 300 is the core of the power output of the grinding drive mechanism, ensuring that each connecting through hole 111 can achieve independent power transmission, thus improving the flexibility of the mechanism. The drive assembly 300 integrates the rotary motor 320, drive shaft 330, flange 340, and pulley 350 to form a complete power output link, converting the power of the rotary motor 320 into the transmission power required by the external grinding components.

[0032] Furthermore, the plurality of drive components 300 are arranged at intervals along the length of the assembly box 100, and the installation directions of two adjacent drive components 300 are opposite.

[0033] On the one hand, the spaced arrangement allows each drive component 300 to correspond to an independent grinding station or grinding area, avoiding interference between the transmission belts and external grinding components caused by multiple drive components 300 being too close together during operation. This ensures that each drive component 300 can output power independently, adapting to the needs of multi-station synchronous grinding and significantly improving work efficiency. On the other hand, the design of adjacent drive components 300 with opposite installation directions allows the pulleys 350 of adjacent drive components 300 to face opposite directions, thus adapting to external grinding components in different directions. Multi-directional grinding operations can be achieved without additional adjustments to the transmission structure, improving the mechanism's adaptability to complex grinding scenarios. In addition, the reverse installation structure can prevent the rotary motors 320, drive shafts 330, and other components of adjacent drive components 300 from being excessively stacked on the same side, reducing space occupation conflicts between components. This makes the internal structure layout of the assembly box 100 more compact and orderly, allowing for the installation of more drive components 300 in a limited space. At the same time, it reduces the heat dissipation problem caused by structural stacking, ensuring the stable operation of each drive component 300.

[0034] Specifically, the rotary motor 320 is the power source of the drive assembly 300. It is fixedly installed in a sealed cavity outside the enclosed box 200, enabling stable operation in a clean, impurity-free environment. This effectively prevents direct contact between grinding debris and dust and the motor, significantly reducing the risk of motor failure due to impurity intrusion and extending the motor's service life. Simultaneously, the rotary motor 320 is connected to the drive shaft 330 via its power output end, converting electrical energy into mechanical energy. This provides continuous and stable power support for the operation of the entire drive assembly 300, serving as the source of the mechanism's power output.

[0035] Furthermore, the drive assembly 300 also includes a mounting bracket 310, which is connected to the base plate 110, and the rotary motor 320 is mounted on the mounting bracket 310. The mounting bracket 310 provides stable mounting support and positioning for the rotary motor 320, and also enables indirect connection between the rotary motor 320 and the base plate 110 of the assembly box 100.

[0036] One end of the drive shaft 330 is connected to the power output end of the rotary motor 320, and the other end passes through the interior of the enclosed box 200, realizing the cross-transmission of power from the sealed cavity to the connecting cavity. Through the rotation of the drive shaft 330, the torque generated by the rotary motor 320 can be accurately transmitted to the pulley 350, which in turn drives the external transmission belt to run, ultimately providing driving force for the grinding components; at the same time, the drive shaft 330 also provides a mounting carrier for the flange 340 and the pulley 350, ensuring that the two can move synchronously with the shaft, ensuring the continuity and stability of power transmission.

[0037] Flange 340 is fitted onto drive shaft 330 and located within the sealing cavity. On one hand, by abutting against the side wall of enclosure 200, flange 340 can limit the axial position of drive shaft 330, preventing axial movement of drive shaft 330 during high-speed rotation and improving the overall operational stability of drive assembly 300. On the other hand, flange 340 can tightly fit the side wall of enclosure 200 and the surface of drive shaft 330, further sealing the assembly gap where drive shaft 330 passes through enclosure 200, preventing the clean environment in the sealing cavity from penetrating with the impurity environment in the connection cavity. This not only prevents impurities from entering the sealing cavity and affecting the motor, but also ensures the cleanliness of the sealing cavity, while enhancing the firmness of the connection between drive assembly 300 and enclosure 200.

[0038] The pulley 350 is fitted onto one end of the drive shaft 330 located in the connecting cavity and serves as the connecting component between the drive assembly 300 and the external grinding components. Through connection with the external transmission belt, it converts the rotational power transmitted by the drive shaft 330 into linear or cyclic motion of the transmission belt, ultimately driving the external grinding components to perform the grinding action. Simultaneously, the connecting cavity provides the pulley 350 with independent installation and operating space, preventing interference between the pulley 350 and other structures, facilitating the installation, disassembly, and maintenance of the transmission belt, and ensuring efficient power transmission.

[0039] Specifically, the drive assembly 300 in this embodiment includes at least two pulleys 350 spaced apart on the drive shaft 330. In different embodiments, the pulleys 350 may be set to other quantities or models according to actual usage requirements. This utility model does not impose specific limitations on this.

[0040] The grinding drive mechanism described in this embodiment also includes a control component, with multiple drive components 300 respectively connected to the control component. During actual production and processing, operators can use the control component to adjust the structure in real time, thereby improving the flexibility of the equipment. Parameters can also be preset using the control component, thereby increasing the automation level of the equipment.

[0041] Example 2:

[0042] This embodiment provides a wire drawing and deburring composite machine, which includes the above-mentioned grinding drive mechanism, grinding roller brush and transmission belt. One end of the transmission belt is sleeved on the pulley 350 of the grinding drive mechanism, and the other end passes through the connecting through hole 111 of the grinding drive mechanism and is connected to the grinding roller brush.

[0043] In summary, the grinding drive mechanism and wire drawing / deburring composite machine described in this utility model, through the structural cooperation between the assembly box 100 and the closed box 200, separates a sealed cavity and multiple connecting cavities. The rotary motor 320 is located in the sealed cavity, and the pulley 350 is located in the connecting cavity, thereby preventing grinding debris from escaping and contacting the rotary motor 320. During this process, the flange 340 not only improves the working stability of the drive assembly 300 but also further seals assembly gaps. Compared with current conventional grinding technologies, this application has significant advantages such as flexible use, long service life, high safety, and stable operation.

[0044] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A grinding drive mechanism, characterized in that: include: An assembly box, wherein the bottom plate of the assembly box is provided with multiple through holes that communicate with the external environment; Multiple closed boxes are disposed in the assembly box and are respectively arranged around the multiple connecting through holes to separate a sealing cavity and multiple connecting cavities inside the assembly box. The multiple connecting cavities are located inside the closed boxes, and the sealing cavity is located outside the closed boxes. Multiple drive components are provided, each connected inside the assembly box and corresponding to one of the multiple enclosed boxes. Each drive component includes a rotary motor, a drive shaft, a flange, and a pulley. The rotary motor is located in the sealed cavity. One end of the drive shaft is connected to the power output end of the rotary motor, and the other end extends into the enclosed box. The flange and the pulley are both fitted onto the drive shaft. The flange is located in the sealed cavity and abuts against the side wall of the enclosed box. The pulley is located in the connecting cavity and is connected to an external drive belt.

2. The grinding drive mechanism according to claim 1, characterized in that: The plurality of drive components are arranged at intervals along the length of the assembly box, and two adjacent drive components are installed in opposite directions.

3. The grinding drive mechanism according to claim 1, characterized in that: The enclosed box includes a box body and a cover plate. The box body is connected to the assembly box, and the cover plate is disposed on the side of the box body away from the drive component and is detachably connected to the box body.

4. The grinding drive mechanism according to claim 1, characterized in that: The assembly box also includes a top plate and side plates. The two ends of the closed box in the height direction are respectively connected to the top plate and the bottom plate. The side plates are arranged around the edges of the top plate and the bottom plate and are detachably connected to the top plate and the bottom plate respectively.

5. The grinding drive mechanism according to claim 4, characterized in that: The top plate has an external connection part in the middle, and an external rotation drive device is rotatably connected to the external connection part to drive the assembly box to move.

6. The grinding drive mechanism according to claim 4, characterized in that: The assembly box also includes multiple support beams, all of which extend along the height direction of the assembly box. The two ends of each support beam are connected to the top plate and the bottom plate, respectively. The side plates are detachably connected to the support beams via disassembly components.

7. The grinding drive mechanism according to claim 1, characterized in that: The drive assembly also includes a mounting bracket connected to the base plate, and the rotary motor is mounted on the mounting bracket.

8. The grinding drive mechanism according to claim 1, characterized in that: The drive assembly includes at least two pulleys spaced apart on the drive shaft.

9. The grinding drive mechanism according to claim 1, characterized in that: The grinding drive mechanism also includes a control component, and the plurality of drive components are respectively connected to the control component.

10. A wire drawing and deburring composite machine, characterized in that: The invention includes the grinding drive mechanism, grinding roller brush, and transmission belt as described in any one of claims 1 to 9, wherein one end of the transmission belt is sleeved on the pulley of the grinding drive mechanism, and the other end passes through the connecting through hole of the grinding drive mechanism and is connected to the grinding roller brush.

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