Automatic sorting machine dispersion feed mechanism for rubber products

Abstract

The utility model discloses a kind of automatic sorting machine dispersion feeding mechanisms for rubber products, including feeding device, storage tank, feed conveyor, paddle scattering wheel and back material conveyor.Punching wheel is installed in the side plate of feed conveyor, and rim and band surface leave gap, and blanking is dispersed by pushing.The baffle between blanking port and punching wheel is adjustable by horizontal drive device, and formable positionable material pass-through port;Be thrown off and excess material is returned to storage tank by back material conveyor.The protection shell is arranged above the device, and the protective cover is arranged outside horizontal drive device.The structure realizes efficient dispersion and stable ration near feed surface, constitutes closed loop recycling, improves the efficiency of image detection and detection consistency.

Description

Technical Field

[0001] This utility model relates to automated feeding and sorting testing equipment, and more particularly to an automatic sorting machine for rubber products with a dispersed feeding mechanism. Background Technology

[0002] In automated sorting and online inspection production lines, rubber products are typically fed into a conveyor belt from a discharge port via a feeding device, and then sent to the inspection mechanism for imaging or measurement. However, rubber parts are viscoelastic, and their surfaces often retain residual formulation oils, release agents, or powders. Under the influence of temperature, static electricity, and pressure, they are prone to adhesion, agglomeration, or bridging at the hopper opening, resulting in insufficient dispersion and uneven layer thickness before entering the inspection station, thus affecting the accuracy of the inspection.

[0003] Existing technologies often employ components such as combing brush rollers on the side of the conveyor belt. However, when rigid material feeding components come into contact with flexible rubber, they are prone to dragging and secondary compaction, which limits the dispersion effect. In addition, the material inlets are mostly fixed or coarsely adjusted structures, which have poor quantitative stability when faced with different specifications, hardness and shape, and are prone to excessive accumulation in front of the dispersing device. Utility Model Content

[0004] This invention aims to solve the problems of easy adhesion, accumulation in front of the dispersing device, and unstable quantitative distribution of materials in the transition zone of the feeding belt.

[0005] The technical solution of this utility model is as follows: An automatic sorting machine for rubber products includes a dispersing feeding mechanism, comprising: a feeding device, the feeding device further comprising: a drive motor and a conveyor belt; the drive motor is used to drive the conveyor belt to run in a cycle, and the discharge end of the conveyor belt is provided with a discharge port; a storage tank is provided on one side of the feeding device; a feeding conveyor belt is provided below the discharge port for feeding raw materials into a detection device; a blade dispersing wheel is installed on the side plate of the feeding conveyor belt, with a gap between its rim and the surface of the conveyor belt for dispersing the raw materials; one end of the blade dispersing wheel is connected to the dispersing wheel drive motor; a return conveyor belt is provided on one side of the feeding conveyor belt for returning the raw materials thrown to the outside by the blade dispersing wheel and excess materials to the storage tank, and the return port of the return conveyor belt is located above the storage tank.

[0006] Furthermore, according to the aforementioned automatic sorting machine for rubber products, a protective housing is integrally covered above the feeding conveyor belt and the return conveyor belt. The protective housing extends along the conveying direction and is integrally formed by a top plate and left and right side plates extending downward from both sides of the top plate. The lower edge of the left and right side plates is provided with an installation edge.

[0007] Preferably, in the aforementioned automatic sorting machine dispersing feeding mechanism for rubber products, a stop is provided between the blade dispersing wheel and the discharge port, one corner of the stop is close to the feeding conveyor belt, a connecting rod is fixed on the stop, and the connecting rod is connected to the transverse drive device.

[0008] Preferably, in some embodiments, the lateral driving device is disposed above the protective housing and includes a lead screw, a lead screw nut, a fixed block, a moving block, a limiting plate, and a handwheel; the lead screw is sleeved inside the fixed block, and the limiting plates are respectively sleeved and fixed on both sides of the lead screw for axially limiting the lead screw relative to the fixed block; one end of the lead screw nut is connected to the moving block, the moving block is fixedly connected to the connecting rod, the connecting rod passes through the protective housing and is fixed to the stop block, and one end of the lead screw is fixedly connected to the handwheel. By rotating the handwheel, the lead screw nut is moved, thereby driving the moving block and the stop block connected by the connecting rod to move axially.

[0009] Preferably, according to the aforementioned automatic sorting machine dispersing and feeding mechanism for rubber products, the moving block has an axially extending guide protrusion on the side facing the protective housing, and the top plate of the protective housing has a corresponding guide groove to guide the moving block in a sliding manner.

[0010] Preferably, in the aforementioned automatic sorting machine dispersing feeding mechanism for rubber products, the side of the feeding conveyor belt near the return conveyor belt has a smooth edge.

[0011] Preferably, a support structure is provided below the feeding conveyor belt and the return conveyor belt, including a base, a pair of uprights and a load-bearing beam.

[0012] Preferably, the lateral drive device is provided with a protective cover.

[0013] The beneficial effects of this utility model are as follows: by setting an elastic blade dispersing wheel near the feed belt and cooperating with the gap on the belt surface, the rubber parts are efficiently disassembled and dispersed, improving the distribution and uniformity of layer thickness; the use of a screw and nut lateral adjustment mechanism to control the blocking and pushing of materials makes the feed amount stable and controllable; the displaced or excess material is returned to the storage tank via the return conveyor belt, forming a closed-loop recycling, reducing cleaning and material loss; the feed belt is equipped with a smooth guide edge near the return side to reduce scraping and edge accumulation; the support structure and adjustable installation connection improve the rigidity and centering of the whole machine, and facilitate maintenance and replacement. Attached Figure Description

[0014] Figure 1 A schematic diagram of the overall structure of an automatic sorting machine for rubber products provided in this application embodiment; Figure 2A side view of the dispersing and feeding mechanism of an automatic sorting machine for rubber products, provided in an embodiment of this application; Figure 3 A schematic diagram of the internal structure of a dispersing and feeding mechanism for an automatic sorting machine for rubber products, provided in an embodiment of this application; Figure 4 for Figure 3 An enlarged schematic diagram of the A-zone structure of an automatic sorting machine for rubber products, provided in an embodiment of this application; Figure 5 A schematic diagram of the back structure of an automatic sorting machine for rubber products provided in an embodiment of this application; Figure 6 for Figure 5 An enlarged schematic diagram of the structure of zone B in an automatic sorting machine for rubber products, provided in an embodiment of this application; Attached icon numbers: 1. Feeding device; 11. Drive motor; 12. Conveyor belt; 13. Drop port; 2. Storage trough; 3. Feeding conveyor belt; 4. Blade dispersing wheel; 41. Dispersing wheel drive motor; 5. Return conveyor belt; 51. Return port; 6. Protective housing; 7. Stop block; 71. Connecting rod; 8. Lateral drive device; 81. Lead screw; 82. Lead screw nut; 83. Fixing block; 84. Limiting plate; 85. Moving block; 851. Guide protrusion; 852. Guide groove; 86. Handwheel; 87. Protective cover; 9. Support structure. Detailed Implementation

[0015] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of this application.

[0016] In automated sorting and online inspection production lines, bulk rubber products are typically fed into the feed conveyor belt 3 through the discharge port 13 by the feeding device 1, and then sent to the inspection mechanism for imaging or measurement. However, rubber parts are viscoelastic, and their surfaces often have residual formulation oil, release agent, or powder. Under the influence of temperature, static electricity, and pressure, they are prone to adhesion, agglomeration, or bridging at the hopper opening, resulting in insufficient dispersion and uneven layer thickness before entering the inspection station, thus affecting the accuracy of the inspection.

[0017] Existing technologies often employ components such as combing brush rollers on the side of the conveyor belt to improve dispersion. However, when rigid material feeding components come into contact with flexible rubber, they are prone to dragging and secondary compaction, which limits the dispersion effect. The material inlets are mostly fixed or coarsely adjusted structures, which have poor quantitative stability when faced with different specifications, hardness and shape, and are prone to excessive accumulation in front of the dispersing device.

[0018] This invention aims to solve the problems of easy adhesion, accumulation in front of the dispersing device, and unstable quantitative distribution of materials in the transition zone of the feeding belt.

[0019] This embodiment discloses an automatic sorting machine for rubber products with a dispersing feeding mechanism, including: a feeding device 1, which further includes: a drive motor 11 and a conveyor belt 12; the drive motor 11 drives the conveyor belt 12 to run in a cycle, and the discharge end of the conveyor belt 12 is provided with a discharge port 13; a storage tank 2 is provided on one side of the feeding device 1; a feeding conveyor belt 3 is provided below the discharge port 13 and is used to feed the raw materials into the detection device; a blade dispersing wheel 4 is installed on the side plate of the feeding conveyor belt 3, and a gap is left between its wheel rim and the surface of the conveyor belt 12 for dispersing the raw materials; one end of the blade dispersing wheel 4 is connected to the dispersing wheel drive motor 41; and a return conveyor belt 5 is provided on one side of the feeding conveyor belt 3 and is used to return the raw materials thrown to the outside by the blade dispersing wheel 4 and the excess raw materials to the storage tank 2, and the return port 51 of the return conveyor belt 5 is located above the storage tank 2.

[0020] The automatic sorting machine for rubber products in this embodiment consists of a feeding device 1, a storage tank 2, a feeding conveyor belt 3, a blade dispersing wheel 4, and a return conveyor belt 5. The feeding device 1 adopts a belt structure, with the conveyor belt 12 driven by a drive motor 11 in a cyclical operation. Its discharge end forms a discharge port 13, which is positioned above the feeding conveyor belt 3 and substantially aligned with its width direction, ensuring a stable transition of bulk rubber parts to the feeding conveyor belt 3 under gravity. The storage tank 2 is located on one side of the feeding device 1, serving as a temporary storage and refeeding location for returned materials. The feeding conveyor belt 3 is horizontally positioned below the discharge port 13 and connects to the subsequent detection device, used to feed the falling rubber parts into the detection area at a constant speed.

[0021] The blade-dispersing wheel 4 is fixed to the side plate of the feed conveyor belt 3. The blades of the dispersing wheel, which are evenly distributed around its circumference, are made of a flexible material. A gap is maintained between the outer edge of the blades and the conveying surface of the feed conveyor belt 3. The size of the gap is related to the size of the rubber product to avoid direct contact and wear. The dispersing wheel is driven to rotate by a dedicated motor. Preferably, it forms a tangential turning direction with the belt surface on the side adjacent to the feed conveyor belt 3, so that the agglomerated rubber parts entering the belt area on this side are dispersed piece by piece into single pieces or thin layers of particles.

[0022] It is understood that "discharge port 13" refers to the opening at the discharge end of the feeding device 1. It is understood that the blade dispersing wheel 4 is a rotating component with multiple elastic blades used to disperse the material falling onto the feed belt; "slinging away" refers to the material that separates from the main feed belt under the action of centrifugal force and tangential force during the dispersing process.

[0023] The return conveyor belt 5 is located on the side of the feed conveyor belt 3. Its height allows it to receive materials spilled by the dispersing wheel and excess materials overflowing from the belt edge due to momentary overload. These materials are then transported along the return flow direction to the return port 51 above the storage trough 2, where gravity allows the material to re-enter the storage trough 2, completing a closed-loop recycling process. The return port 51 is located above the storage trough 2 to reduce secondary spillage and facilitate reloading.

[0024] With the above-described structure, after the material is evenly fed from the discharge port 13 onto the feed conveyor belt 3 via the feeding device 1, it is first gently agitated in the gap area formed by the belt edge and the blade dispersing wheel 4. The agglomerates are quickly dispersed and tend to spread into a single layer. When the local supply increases or the edge overflows due to irregular shape, the overflowing and excess material is promptly received by the return conveyor belt 5 and returned to the storage tank 2, avoiding accumulation in front of the dispersing area. This process ensures that the material entering the detection device is conveyed in a single layer, uniformly, and stably, improving the imaging efficiency and judgment consistency. At the same time, the non-contact combing between the blade and the belt surface reduces wear and the risk of material jamming, and the closed-loop return reduces manual cleaning and material loss. Based on the same structure, this embodiment is also applicable to rubber parts of different specifications, hardness, and surface conditions. By adjusting the speed of the dispersing wheel and the belt surface gap, the required dispersion effect and feeding stability can be obtained without changing the overall cycle time.

[0025] In some embodiments, a protective housing 6 is integrally covered above the feeding conveyor belt 3 and the return conveyor belt 5. The protective housing 6 extends along the conveying direction and is integrally formed by a top plate and left and right side plates extending downward from both sides of the top plate. The lower edge of the left and right side plates is provided with mounting edges.

[0026] In this embodiment, the protective housing 6 is a box-shaped component that extends integrally along the conveying direction, and is formed by bending the top plate and the left and right side plates that are folded down from both sides of the top plate as a whole.

[0027] The mounting edge refers to the flange formed by the outward folding of the lower edge of the side plate, used for detachable connection with the side beam of the frame. An elongated hole is provided on the mounting edge, allowing for bolt connection to the frame and the installation of an elastic sealing strip for vibration damping and dustproof sealing. The shell length covers the working area of ​​the feed conveyor belt 3 and the return conveyor belt 5. Openable inspection ports or transparent observation panels are provided at both ends of the top plate. Small inward folds or flexible slats can be provided on the inner edges of the side plates to suppress material leakage. The inner corners of the shell are rounded to avoid material accumulation. A safe clearance is maintained between the shell and the conveying surface to ensure smooth material passage.

[0028] During operation, the protective housing 6 forms a relatively enclosed and visible conveying space above the feeding conveyor belt 3 and the return conveyor belt 5, which restrains and blocks the scattered materials during the dispersing process, preventing personnel from accidentally touching moving parts; the elongated holes on the mounting side enable the housing to be quickly positioned and slightly adjusted relative to the conveying surface, adapting to working conditions with different thicknesses / heights; the detachable structure facilitates daily cleaning and maintenance, reduces downtime, and thus maintains a stable, clean and safe dispersed conveying environment without changing the conveying rhythm.

[0029] In some embodiments, a stop 7 is provided between the blade dispersing wheel 4 and the discharge port 13. One corner of the stop 7 is close to the feeding conveyor belt 3. A connecting rod 71 is fixed on the stop 7 and is connected to the transverse drive device 8.

[0030] like Figure 4 As shown, a stop block 7 is provided between the blade dispersing wheel 4 and the discharge port 13. The stop block 7 is preferably plate-shaped or wedge-shaped, with one corner facing the feeding conveyor belt 3 rounded or beveled, and maintaining a small gap with the conveying surface of the feeding conveyor belt 3 to form a flow-limiting and guiding effect without contacting the belt surface. A connecting rod 71 is fixedly connected to the stop block 7, and the connecting rod 71 is connected to the transverse drive device 8, which is used to drive the stop block 7 to make linear fine adjustments along the width direction of the belt, so that the width of the material passage formed between one corner of the stop block 7 and the belt edge can be adjusted, thereby controlling the amount of material entering the detection device. During operation, the material falls from the discharge port 13 and first cooperates with the window formed by the stop block 7 to achieve flow-limiting and shaping; the part exceeding the window is guided to one side of the blade dispersing wheel 4 and dispersed or diverted to avoid accumulation in front of the dispersing area. Because the stop block 7 is rounded and has a gap in the belt surface, it can reduce scraping and jamming, reduce agglomeration and bridging at this point, and ensure single-layer, uniform and stable conveying of materials falling into the transition zone of the feed belt.

[0031] In some embodiments, such as Figure 6 As shown, the transverse drive device 8 is arranged above the protective housing 6, with "transverse" meaning along the width direction of the feed conveyor belt 3. The lead screw 81 is rotatably supported by the fixed block 83, which acts as a bearing seat for the lead screw 81. The limiting plates 84 fitted and fixed on both sides of the lead screw 81 serve as thrust members, limiting the axial movement of the lead screw 81 relative to the fixed block 83, ensuring reliable torque transmission of the handwheel 86 without shaft slippage. One end of the lead screw 81 is fixedly connected to the handwheel 86. Manually rotating the handwheel 86 drives the lead screw 81 to rotate, causing the lead screw nut 82 to make a linear feed under the side effect of the thread and be fixedly connected to the moving block 85. The moving block 85 is then rigidly connected to the stop block 7 via the connecting rod 71. The connecting rod 71 passes through the through hole of the protective housing 6, and a sealing bushing can be installed at the protrusion position to take into account both guidance and vibration reduction. Thus, for each rotation of the handwheel 86, the stop block 7 moves one lead of the lead screw 81 laterally, realizing continuous adjustment and repeatable positioning of the feed window.

[0032] The limiting plate 84 prevents the lead screw 81 from axial displacement during frequent adjustments, thus improving the stability of the adjustment. The entire device is located above the housing, avoiding interference with the material flow area, facilitating observation and operation, and allowing for controllable lateral adjustment of the amount of material entering the detection device.

[0033] In some embodiments, the movable block 85 has an axially extending guide protrusion 851 on the side facing the protective housing 6, and the top plate of the protective housing 6 has a corresponding guide groove 852 to guide the movable block 85 to slide.

[0034] It is understood that the movable block 85 has a guide ridge 851 on the side facing the protective housing 6, which extends continuously along the width of the feed conveyor belt 3; the top plate of the protective housing 6 has a corresponding guide groove 852 that engages with it. The two work together to ensure that the movable block 85 slides only in a straight line relative to the top plate and cannot rotate or wobble. The guide ridge 851 can be a rectangular tongue-shaped or dovetail-shaped cross-section to reduce friction and wear, and ensure smooth sliding without significant wobbling. The length of the groove covers the effective adjustment stroke of the stop block 7, and the external protective housing 6 facilitates cleaning and maintenance and reduces the risk of dust entering the transmission pair.

[0035] In some embodiments, the side of the feed conveyor belt 3 near the return conveyor belt 5 has a smooth edge.

[0036] The feeding conveyor belt 3 has a smooth edge on the side closest to the return conveyor belt 5. This smooth edge consists of a smooth transition at the belt edge and an outer elastic guard: the belt edge has no right angles and is rounded; the elastic guard is made of wear-resistant and oil-resistant elastic material and is fixed to the belt body by embedding, snapping, or fasteners. The end transition is smooth and forms a continuous surface with the belt body. The smooth edge maintains a working gap with adjacent components, allowing it to guide the material in a non-contact state. During operation, material falling to the belt edge and being agitated by the blade-dispersing wheel 4 is guided to the main belt surface or the return conveyor belt 5, reducing scraping, jamming, and edge accumulation, decreasing wear on the belt body and workpiece, and improving the efficiency of removing and recovering displaced or excess material, thereby stabilizing the layer thickness and distribution before and after the dispersing area.

[0037] In some embodiments, a support structure 9 is provided below the feed conveyor belt 3 and the return conveyor belt 5, including a base, a pair of uprights and a load-bearing beam.

[0038] A support structure 9 is installed below the feeding conveyor belt 3 and the return conveyor belt 5. The support structure 9 consists of a base, paired columns, and a load-bearing crossbeam. The base is fixed to the ground, serving as a bearing and positioning reference. The paired columns are vertically installed on the upper end of the base, with the two columns arranged opposite each other to form a stable gantry. The load-bearing crossbeam spans the upper ends of the two columns and is used to connect to the support brackets of the two conveyor belts 12. The mounting surface of the load-bearing crossbeam is provided with elongated holes or guide grooves, which are adjustable to the conveyor belt 12 brackets via bolts, allowing for adjustments to the height, left-right alignment, and slight front-back positions of the conveyor belts 12 to maintain a reasonable clearance with the protective shell 6 above and adjacent components. The columns are bolted or welded to the base and crossbeams, and stiffeners are used to improve overall rigidity and vibration resistance. Through the above structure, the conveyor belt 12 assembly obtains a stable and adjustable mounting reference, ensuring the coaxial and parallel relationship of the feeding and return paths, reducing operational sway and wear, facilitating maintenance and cleaning, and thus providing reliable bottom support for dispersing, flow limiting, and closed-loop return.

[0039] In some embodiments, the lateral drive device 8 is provided with a protective cover.

[0040] Specifically, a protective cover is provided on the outside of the transverse drive device 8. The protective cover is a shell-type component that fits around the area where the handwheel 86, lead screw 81, lead screw nut 82, and moving block 85 are located. The top and sidewalls are integrally formed, and the bottom edge is detachably connected to the top plate or corresponding support of the protective housing 6 via a flange. A sealing / dustproof structure is provided at the connection to prevent dust from entering. An operating opening or an openable cover is provided on the protective cover corresponding to the position of the handwheel 86 to facilitate the adjustment of the handwheel 86. A through hole is provided at the position where the connecting rod 71 protrudes, and a guide or sealing bushing is installed in the hole to provide support and sealing for the connecting rod 71 during reciprocating movement, preventing shaking and dust leakage. A transparent observation window can be provided on the cover or the entire cover can be made of transparent material to facilitate observation of the relative position of the moving block 85 and the stop block 7 and the adjustment stroke.

[0041] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A dispersing and feeding mechanism for an automatic sorting machine for rubber products, characterized in that, include: The feeding device (1) further includes: a drive motor (11) and a conveyor belt (12); the drive motor (11) is used to drive the conveyor belt (12) to run in a cycle, and the discharge end of the conveyor belt (12) is provided with a discharge port (13). The storage tank (2) is located on one side of the feeding device (1); The feeding conveyor belt (3) is located below the discharge port (13) and is used to feed the raw materials into the detection device; The blade-shaped dispersing wheel (4) is installed on the side plate of the feed conveyor belt (3), with a gap between its rim and the surface of the conveyor belt (12) for dispersing the raw materials; one end of the blade-shaped dispersing wheel (4) is connected to the dispersing wheel drive motor (41); The return conveyor belt (5) is located on one side of the feed conveyor belt (3) and is used to return the raw materials that have been thrown to the outside by the blade dispersing wheel (4) and the excess raw materials to the storage tank (2). The return port (51) of the return conveyor belt (5) is located above the storage tank (2).

2. The automatic sorting machine dispersing and feeding mechanism for rubber products according to claim 1, characterized in that, The feeding conveyor belt (3) and the return conveyor belt (5) are covered by a protective shell (6). The protective shell (6) extends along the conveying direction and is integrally formed by a top plate and left and right side plates extending downward from both sides of the top plate. The lower edge of the left and right side plates is provided with an installation edge.

3. The automatic sorting machine dispersing and feeding mechanism for rubber products according to claim 2, characterized in that, A stop (7) is provided between the blade dispersing wheel (4) and the discharge port (13). One corner of the stop (7) is close to the feeding conveyor belt (3). A connecting rod (71) is fixed on the stop (7). The connecting rod (71) is connected to the transverse drive device (8).

4. The automatic sorting and dispersing feeding mechanism for rubber products according to claim 3, characterized in that, The lateral drive device (8) is located above the protective housing (6) and includes a lead screw (81), a lead screw nut (82), a fixed block (83), a moving block (85), a limiting piece (84), and a handwheel (86). The lead screw (81) is sleeved in the fixed block (83), and the limiting pieces (84) are respectively sleeved and fixed on both sides of the lead screw (81) to axially limit the lead screw (81) relative to the fixed block (83). One end of the lead screw nut (82) is connected to the moving block (85), and the moving block (85) is fixedly connected to the connecting rod (71). The connecting rod (71) passes through the protective housing (6) and is fixed to the stop block (7). One end of the lead screw (81) is fixedly connected to the handwheel (86). By rotating the handwheel (86), the lead screw nut (82) is moved, thereby driving the moving block (85) and the stop block (7) connected by the connecting rod (71) to move axially.

5. The automatic sorting and dispersing feeding mechanism for rubber products according to claim 4, characterized in that, The movable block (85) has an axially extending guide protrusion (851) on the side facing the protective housing (6), and the top plate of the protective housing (6) has a corresponding guide groove (852) to guide the movable block (85) to slide.

6. The automatic sorting and dispersing feeding mechanism for rubber products according to claim 2, characterized in that, The feeding conveyor belt (3) has a smooth edge on the side near the return conveyor belt (5).

7. The automatic sorting machine dispersing and feeding mechanism for rubber products according to claim 6, characterized in that, The feeding conveyor belt (3) and the return conveyor belt (5) are provided with a support structure (9), including a base, a pair of uprights and a load-bearing beam.

8. The automatic sorting and dispersing feeding mechanism for rubber products according to claim 4, characterized in that, The lateral drive device (8) is also provided with a protective cover.

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