Angle adjusting device for grooving carbon-carbon bolt

Abstract

The utility model relates to the technical field of bolt slotting, in particular to an angle adjusting device for slotting a carbon-carbon bolt. According to the specific technical scheme, the angle adjusting device for carbon-carbon bolt slotting comprises supporting plates which are correspondingly arranged, each supporting plate is sequentially provided with a conveying mechanism and an adjusting mechanism, the conveying mechanisms and the adjusting mechanisms are correspondingly arranged, the conveying mechanisms and the adjusting mechanisms are arranged on the supporting plates in a sliding mode, and the conveying mechanisms and the adjusting mechanisms are arranged on the supporting plates in a sliding mode. The two conveying mechanisms and the adjusting mechanism move oppositely or move away from each other, transition plates are arranged between the conveying mechanisms and the adjusting mechanism, and the distance between the transition plates is gradually reduced from the conveying mechanisms to the adjusting mechanism. According to the angle adjusting device disclosed by the utility model, the slotting cutter can be vertical to the texture of the head part of the carbon-carbon bolt, so that the slotting operation can be finished at one time.

Description

Technical Field

[0001] The utility model relates to the technical field of bolt grooving, in particular to an angle adjusting device for grooving carbon-carbon bolts. Background Technique

[0002] A carbon-carbon bolt is a product obtained by precision machining carbon-carbon composite materials through a CNC numerical control machining center. The carbon-carbon composite material is a fully carbonaceous composite material made of carbon fiber and its fabric as reinforcing materials and carbon as the matrix through processing and carbonization treatments. The carbon-carbon composite material has a series of excellent properties such as low density, high temperature resistance, corrosion resistance, good thermal shock performance, resistance to acids, alkalis, salts, and wear and friction. Therefore, the carbon-carbon composite material has excellent mechanical properties, can be used as a structural material to bear heavy loads, and can also function as a functional material, and is suitable for various high-temperature applications.

[0003] After processing the carbon-carbon composite material into a carbon-carbon bolt, the head has fiber textures facing the same direction. When grooving the head of the bolt, the grooving direction needs to be perpendicular to the texture of the bolt head. If grooving along the texture, it will affect the mechanical properties of the bolt. Therefore, a device for adjusting the angle during grooving the bolt head is needed. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the utility model provides an angle adjusting device for grooving carbon-carbon bolts, so that the grooving cutter is perpendicular to the texture of the carbon-carbon bolt head, thereby completing the grooving operation at one time.

[0005] To achieve the above purposes, the utility model is realized through the following technical solutions:

[0006] The utility model discloses an angle adjusting device for grooving carbon-carbon bolts, including corresponding support plates. A conveying mechanism and an adjusting mechanism are sequentially arranged on each support plate. The conveying mechanism and the adjusting mechanism are correspondingly arranged. The conveying mechanism and the adjusting mechanism are slidably arranged on the support plate, so that the two conveying mechanisms and the adjusting mechanisms move towards each other or away from each other respectively. A transition plate is arranged between the conveying mechanism and the adjusting mechanism, and the distance between the transition plates gradually decreases from the conveying mechanism to the adjusting mechanism.

[0007] Preferably, the conveying mechanism includes vertically and correspondingly arranged first transmission shafts. A first conveyor belt is sleeved on the two first transmission shafts. On the two support plates, the belt surfaces of the first conveyor belt are vertical and correspondingly arranged. The carbon-carbon bolt is placed between the two first conveyor belts, and the bottom surface of the carbon-carbon bolt head is in contact with the upper surface of the first conveyor belt.

[0008] Preferably, the adjusting mechanism includes second transmission shafts that are vertical and correspondingly arranged. A second conveyor belt is sleeved on the two second transmission shafts. On the two support plates, the belt surfaces of the second conveyor belt are vertical and correspondingly arranged. The carbon-carbon bolt is conveyed by the first conveyor belt to between the two second conveyor belts, and the belt surface of the second conveyor belt contacts the rod portion of the carbon-carbon bolt.

[0009] Preferably, fixing plates are respectively arranged between the first transmission shafts and between the second transmission shafts. The fixing plates are arranged at positions near the top and bottom ends of the first rotating shaft and the second transmission shaft. The distance between the two fixing plates is equal to the widths of the first conveyor belt and the second conveyor belt. Both the first transmission shaft and the second transmission shaft are driven by motors.

[0010] Preferably, the upper surfaces of the first conveyor belt and the second conveyor belt are flush, and the plate surface of the transition plate is flush with the upper surfaces of the first conveyor belt and the second conveyor belt.

[0011] Preferably, a spring piece is arranged beside the transition plate. One end of the spring piece bends towards the area between the transition plates. An electromagnet is arranged at the convex surface position near the bending part of the spring piece. A camera is arranged above the transition plate.

[0012] Preferably, the conveying mechanism and the adjusting mechanism are respectively arranged on a backing plate. A baffle is arranged on one side of the backing plate away from the first conveyor belt and the second conveyor belt. Waist-shaped holes are arranged near both ends of the backing plate. The backing plate is fixed to the support plate by bolts passing through the waist-shaped holes. The direction in which the waist-shaped holes are arranged is the same as the moving direction of the conveying mechanism and the adjusting mechanism.

[0013] Preferably, tensioning mechanisms are respectively arranged on the adjusting mechanism and the conveying mechanism. The tensioning mechanism includes a fixing frame in the shape of a "C". The two cross plates of the fixing frame are respectively located on the upper surface of the upper fixing plate and the lower surface of the lower fixing plate. Driving wheels are arranged in the inner circles of the first conveyor belt and the second conveyor belt. The output end of the motor passes through the lower cross plate of the fixing frame and is connected to the driving wheel. An adjusting bolt penetrates through the baffle. The adjusting bolt is threadedly connected to the vertical plate of the fixing frame.

[0014] Preferably, a notch for accommodating the lower cross plate of the fixing frame is arranged on the backing plate. The direction in which the notch is arranged is the same as the moving direction of the fixing frame.

[0015] Preferably, the conveying mechanism and the adjusting mechanism are arranged in an installation shell. The installation shell is arranged on the support plate. The belt surfaces of the first conveyor belt on the conveying mechanism and the second conveyor belt on the adjusting mechanism extend out of the installation shell. Cleaning pads are arranged at the gaps between the first conveyor belt and the second conveyor belt and the installation shell. Both the first conveyor belt and the second conveyor belt are inner-toothed conveyor belts.

[0016] The utility model has the following beneficial effects:

[0017] The utility model realizes the conveying of carbon-carbon bolts through a correspondingly arranged conveying mechanism. The conveying mechanism mainly consists of a first conveyor belt. The belt surfaces of the two first conveyor belts are vertically arranged. The carbon-carbon bolts are clamped between the belt surfaces of the two first conveyor belts. The distance between the two first conveyor belts can be adjusted to adapt to the conveying of carbon-carbon bolts of different sizes. At the same time, a transition plate is arranged at the tail end of the first conveyor belt. The carbon-carbon bolts on the first conveyor belt are conveyed to the adjusting mechanism through the transition plate. Then, by controlling the running speeds of the two second conveyor belts in the adjusting mechanism, the adjustment of the head pattern orientation of the carbon-carbon bolts is realized, and finally, a straight slot is opened in the direction of the vertical pattern. During the whole process, the number of carbon-carbon bolts entering the second conveyor belt is controlled by the elastic piece beside the transition plate, and the pattern orientation of the heads of the carbon-carbon bolts entering the second conveyor belt is monitored by the camera above the transition plate. The whole process is simple and convenient to operate, with a high degree of automation. The slotting operation of the heads of the carbon-carbon bolts is realized at one time through the arranged conveying mechanism and adjusting mechanism. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of the utility model;

[0019] Figure 2 is Figure 1 the left view of;

[0020] Figure 3 is a schematic structural diagram of the utility model after removing the installation shell;

[0021] Figure 4 is a schematic structural diagram of the tensioning mechanism;

[0022] Figure 5 is a schematic structural diagram of the connection structure between the backing plate and the fixing frame;

[0023] In the figure: support plate 1, transition plate 2, first transmission shaft 3, first conveyor belt 4, second transmission shaft 5, second conveyor belt 6, fixing plate 7, motor 8, elastic piece 9, electromagnet 10, camera 11, backing plate 12, baffle 13, waist-shaped hole 14, bolt 15, fixing frame 16, driving wheel 17, adjusting bolt 18, notch 19, installation shell 20, cleaning pad 21. Specific Embodiments

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] If not specifically specified, the technical means used in the implementation examples are conventional means well-known to those skilled in the art.

[0026] Reference Figures 1-5 , the present invention discloses an angle adjustment device for grooving carbon-carbon bolts, including corresponding support plates 1 arranged horizontally and away from each other. A conveying mechanism and an adjustment mechanism are sequentially arranged on each support plate 1. The conveying mechanisms and adjustment mechanisms on the two support plates are correspondingly arranged, that is, the conveying mechanisms correspond to each other, and the adjustment mechanisms correspond to each other. The gap between the conveying mechanisms or the adjustment mechanisms is located above the gap between the support plates. The conveying mechanism and the adjustment mechanism are slidably arranged on the support plate 1, so that the two conveying mechanisms and adjustment mechanisms move towards each other or away from each other respectively, thereby adjusting the gap between the conveying mechanism and the adjustment mechanism according to the size of the carbon-carbon bolt. A transition plate 2 is arranged between the conveying mechanism and the adjustment mechanism, so that the carbon-carbon bolt conveyed by the conveying mechanism enters the adjustment mechanism through the transition plate. The distance between the transition plates 2 gradually decreases from the conveying mechanism to the adjustment mechanism, so as to better fix the carbon-carbon bolt. By adjusting the distance between the transition plates, the carbon-carbon bolt gradually approaches the rod part of the carbon-carbon bolt from hanging on the transition plate. It is directly pushed from the transition plate into (during this process, the carbon-carbon bolt does not rotate, but is directly pushed linearly between the second conveyor belts) the rod part of the carbon-carbon bolt on the second conveyor belt is clamped by the second conveyor belt. At the same time, the bottom surface of the head of the carbon-carbon bolt contacts the upper surface of the second conveyor belt.

[0027] Specifically: The conveying mechanism includes vertically corresponding first transmission shafts 3. A first conveyor belt 4 is sleeved on the two first transmission shafts 3. On the two support plates 1, the belt surfaces of the first conveyor belt 4 are vertical and corresponding. The carbon-carbon bolt is placed between the two first conveyor belts 4, and the bottom surface of the head of the carbon-carbon bolt contacts the upper surface of the first conveyor belt 4.

[0028] The adjustment mechanism includes vertically corresponding second transmission shafts 5. A second conveyor belt 6 is sleeved on the two second transmission shafts 5. On the two support plates 1, the belt surfaces of the second conveyor belt 6 are vertical and corresponding. The carbon-carbon bolt is conveyed from the first conveyor belt 4 to between the two second conveyor belts 6, and the belt surface of the second conveyor belt 6 contacts the rod part of the carbon-carbon bolt.

[0029] It should be noted that: the first transmission shaft and the second transmission shaft are both arranged along the length direction of the support plate, so that the belt surfaces of the first conveyor belt and the second conveyor belt are arranged along the length direction of the support plate and are located at the gap between the support plates.

[0030] Furthermore, in order to increase the stability during the transportation of carbon-carbon bolts, fixing plates 7 are respectively arranged between the first transmission shafts 3 and between the second transmission shafts 5. The fixing plates 7 are arranged at positions near the top and bottom ends of the first rotating shaft and the second transmission shaft 5. The distance between the two fixing plates 7 is equal to the width of the first conveyor belt 4 and the second conveyor belt 6. During the operation of the conveyor belt, under the action of the fixing plates, the strength of the conveyor belt is increased, avoiding the influence on the transportation of carbon-carbon bolts due to the softness of the conveyor belt. The first transmission shaft 3 and the second transmission shaft 5 are both driven by a motor 8. It should be noted that: the carbon-carbon bolts can be manually placed on the conveying mechanism or can be placed on the conveying mechanism through other equipment, such as a bolt sorting device, which is used to neatly arrange the bolts and is an existing device.

[0031] Furthermore, the upper surfaces of the first conveyor belt 4 and the second conveyor belt 6 are flush, and the plate surface of the transition plate 2 is flush with the upper surfaces of the first conveyor belt 4 and the second conveyor belt 6, so that the carbon-carbon bolts can be stably clamped between the first conveyor belts and enter the second conveyor belt through the transition plate.

[0032] Furthermore, in order to control the number of carbon-carbon bolts entering the second conveyor belt through the transition plate, a spring piece 9 is arranged beside the transition plate 2. One end of the spring piece 9 bends towards the area between the transition plates 2, thereby blocking the carbon-carbon bolts transported to this position. At the same time, an electromagnet 10 is arranged at the convex surface position near the bending part of the spring piece 9, and a camera 11 is arranged above the transition plate 2. By energizing the electromagnet to adsorb the spring piece, the opening or closing of the spring piece is realized. When the spring piece is opened, the conveying mechanism operates to transport a carbon-carbon bolt into the adjusting mechanism, and then the spring piece closes, and the adjusting mechanism starts to adjust the direction of the threads on the carbon-carbon bolt.

[0033] Furthermore, in order to adjust the distance between the conveying mechanisms and between the adjusting mechanisms, the conveying mechanisms and the adjusting mechanisms are respectively arranged on a backing plate 12, and the backing plate is placed on the support plate.

[0034] On one side of the backing plate 12 away from the first conveyor belt 4 and the second conveyor belt 6, that is, on the side away from the gap between the support plates, a baffle 13 is provided. Waist-shaped holes 14 are provided near both ends of the backing plate 12. The direction in which the waist-shaped holes 14 are arranged is the same as the moving direction of the conveying mechanism and the adjusting mechanism, that is, the waist-shaped holes are perpendicular to the gap between the support plates. Bolts 15 pass through the waist-shaped holes 14 to fix the backing plate 12 to the support plate 1. By providing the waist-shaped holes, the distance between the adjusting mechanisms and between the conveying mechanisms can be adjusted according to the size of the carbon-carbon bolts. After the adjustment is completed, it can be fixed by bolts.

[0035] Further, tensioning mechanisms are respectively provided on the adjusting mechanism and the conveying mechanism to adjust the tension degree of the conveyor belts. The tensioning mechanism includes a "C"-shaped fixing frame 16. The two cross plates of the fixing frame 16 are respectively located on the upper surface of the upper fixing plate 7 and the lower surface of the lower fixing plate 7. Driving wheels 17 are arranged in the inner circles of the first conveyor belt 4 and the second conveyor belt 6. The output end of the motor 8 passes through the lower cross plate of the fixing frame 16 and is connected to the driving wheel 17. An adjusting bolt 18 penetrates through the baffle 13, and the adjusting bolt 18 is threadedly connected to the vertical plate of the fixing frame 16. It should be noted that: the output shaft of the motor sequentially penetrates through the lower cross plate of the fixing frame, the driving wheel, and the upper cross plate of the fixing frame, and the output shaft of the motor is rotatably connected to the fixing frame and fixedly connected to the driving wheel. The adjusting bolt is threadedly connected to the fixing frame. By screwing the adjusting bolt, the fixing frame can be adjusted, so that the fixing frame moves towards or away from the baffle, thereby realizing the adjustment of the tension degree of the conveyor belt.

[0036] Further, a notch 19 for accommodating the lower cross plate of the fixing frame 16 is provided on the backing plate 12. The direction in which the notch 19 is arranged is the same as the moving direction of the fixing frame 16, that is, the opening direction of the notch faces the gap between the support plates. The length of the notch is greater than the length of the cross plate of the fixing frame, which is convenient for the fixing frame to move along the notch when adjusting the fixing frame by the adjusting bolt. At the same time, a through hole for the motor to pass through is provided at the bottom of the support plate. The size of the through hole is determined according to the distance that the fixing frame can move, that is, when the fixing frame moves by the adjusting bolt, the motor moves together with the fixing frame.

[0037] Further, the conveying mechanism and the adjusting mechanism are arranged inside the mounting shell 20 to prevent the equipment from being exposed. The mounting shell 20 is arranged on the support plate 1. The belt surfaces of the first conveyor belt 4 on the conveying mechanism and the second conveyor belt 6 on the adjusting mechanism extend outside the mounting shell 20. A cleaning pad 21 is arranged at the gap between the first conveyor belt 4 and the second conveyor belt 6 and the mounting shell 20, which is convenient for cleaning the carbon-carbon composite material generated during grooving. Both the first conveyor belt 4 and the second conveyor belt 6 are internal-tooth conveyor belts, which can increase the accuracy during the operation of the conveying mechanism and the adjusting mechanism and prevent the conveyor belt from slipping. The camera is fixed on the top of the mounting shell through a mounting bracket, and the electromagnet is also fixed on the top of the mounting shell. The elastic piece is fixed on the side wall of the mounting shell on the same side as the conveyor belt.

[0038] When using the present utility model, place or convey the carbon-carbon bolt between the two first conveyor belts, and clamp the carbon-carbon bolt by adjusting the distance between the two first conveyor belts. When clamping, the bottom surface of the head of the carbon-carbon bolt is in contact with the top surface of the first conveyor belt. As the two first conveyor belts run, convey the carbon-carbon bolt to the position of the transition plate and stack it in the gap between the transition plates in sequence, and block it with the elastic piece; subsequently, when the electromagnet is powered on and the elastic piece opens, when the first conveyor belt runs, when the carbon-carbon bolt is transported towards the transition plate, the carbon-carbon bolt will squeeze the carbon-carbon bolts between the transition plates, so as to push the carbon-carbon bolt close to the second conveyor belt onto the second conveyor belt; after the carbon-carbon bolt enters the second conveyor belt, the elastic piece closes, and the first conveyor belt stops running. By controlling the running speed between the two second conveyor belts, the carbon-carbon bolt rotates on the second conveyor belt to achieve the purpose of adjusting the grain orientation. During this process, the rod part of the carbon-carbon bolt is in a clamped state by the belt surface of the second conveyor belt. The camera monitors the direction of the grain on the head of the carbon-carbon bolt at the initial position (on the transition plate), and then, based on this, adjusts the grain direction of the carbon-carbon bolt by controlling the running speed difference of the second conveyor belt. After adjustment, use the cutter arranged above the second conveyor belt to groove the head of the carbon-carbon bolt, specifically a slotted groove. It should be noted here that both of the two second conveyor belts need to run, while adjusting the grain direction, the carbon-carbon bolt is also transported to the designated position.

[0039] After the carbon-carbon bolt is grooved, it is conveyed to the tail end by the second conveyor belt and drops; then the first conveyor belt starts, and together with the elastic piece, pushes the carbon-carbon bolt closest to the elastic piece onto the second conveyor belt through other carbon-carbon bolts for grooving the next carbon-carbon bolt.

[0040] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0041] The embodiments described above are only descriptions of the preferred modes of the present utility model, and do not limit the scope of the present utility model. Without departing from the design spirit of the present utility model, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present utility model shall fall within the protection scope determined by the claims of the present utility model.

Claims

1. An angle adjustment device for slotting a carbon-carbon bolt, comprising a correspondingly arranged support plate (1), characterized in that: A conveying mechanism and an adjusting mechanism are sequentially arranged on each of the support plates (1), and the conveying mechanisms and adjusting mechanisms are arranged correspondingly. The conveying mechanisms and adjusting mechanisms are slidably arranged on the support plates (1), so that the two conveying mechanisms and adjusting mechanisms move towards each other or away from each other. A transition plate (2) is arranged between the conveying mechanisms and the adjusting mechanisms, and the distance between the transition plates (2) gradually decreases from the conveying mechanism to the adjusting mechanism.

2. The angle adjustment device for carbon-carbon bolt slotting according to claim 1, characterized in that: The conveying mechanism comprises first transmission shafts (3) which are arranged vertically and correspondingly, two first transmission shafts (3) are sleeved with first conveyor belts (4), the belt surfaces of the first conveyor belts (4) are arranged vertically and correspondingly on the two support plates (1), a carbon-carbon bolt is placed between the two first conveyor belts (4), and the bottom surface of the carbon-carbon bolt head is in contact with the upper surface of the first conveyor belt (4).

3. The angle adjustment device for carbon-carbon bolt slotting according to claim 2, characterized in that: The adjustment mechanism comprises second transmission shafts (5) which are arranged vertically and correspondingly, and second conveyor belts (6) are sleeved on the two second transmission shafts (5). The belt surfaces of the second conveyor belts (6) are arranged vertically and correspondingly on the two support plates (1). The carbon-carbon bolts are conveyed between the two second conveyor belts (6) by the first conveyor belt (4), and the belt surfaces of the second conveyor belts (6) are in contact with the rods of the carbon-carbon bolts.

4. The angle adjustment device for carbon-carbon bolt slotting according to claim 3, characterized in that: A fixing plate (7) is provided between the first transmission shafts (3) and between the second transmission shafts (5), respectively. The fixing plates (7) are provided at positions close to the top and bottom ends of the first rotating shaft and the second transmission shaft (5). The distance between the two fixing plates (7) is equal to the width of the first conveyor belt (4) and the second conveyor belt (6). The first transmission shaft (3) and the second transmission shaft (5) are both driven by a motor (8).

5. The angle adjustment device for carbon-carbon bolt slotting according to claim 4, characterized in that: The upper surfaces of the first conveyor belt (4) and the second conveyor belt (6) are flush, and the plate surface of the transition plate (2) is flush with the upper surfaces of the first conveyor belt (4) and the second conveyor belt (6).

6. The angle adjustment device for carbon-carbon bolt slotting according to claim 1, characterized in that: A spring sheet (9) is arranged on the side of the transition plate (2), one end of the spring sheet (9) is bent toward the area between the transition plates (2), an electromagnet (10) is arranged at a convex position close to the bent part of the spring sheet (9), and a camera (11) is arranged above the transition plate (2).

7. The angle adjustment device for carbon-carbon bolt slotting according to claim 4, characterized in that: The conveying mechanism and the adjusting mechanism are respectively arranged on a pad (12); a baffle (13) is arranged on a side of the pad (12) away from the first conveyor belt (4) and the second conveyor belt (6); waist-shaped holes (14) are arranged on the pad (12) near both ends thereof; the pad (12) is fixed to the support plate (1) by bolts (15) passing through the waist-shaped holes (14); and the direction in which the waist-shaped holes (14) are arranged is consistent with the direction in which the conveying mechanism and the adjusting mechanism move.

8. The angle adjustment device for carbon-carbon bolt slotting according to claim 7, characterized in that: Tensioning mechanisms are respectively arranged on the adjusting mechanism and the conveying mechanism. The tensioning mechanism includes a fixing bracket (16) in a "C" shape. The two cross plates of the fixing bracket (16) are respectively located on the upper surface of the upper fixing plate (7) and the lower surface of the lower fixing plate (7). Driving wheels (17) are arranged in the inner circles of the first conveyor belt (4) and the second conveyor belt (6). The output end of the motor (8) passes through the lower cross plate of the fixing bracket (16) and is connected to the driving wheel (17). An adjusting bolt (18) penetrates through the baffle (13), and the adjusting bolt (18) is threadedly connected to the vertical plate of the fixing bracket (16).

9. The angle adjustment device for carbon-carbon bolt slotting according to claim 8, characterized in that: A notch (19) for accommodating the lower cross plate of the fixing bracket (16) is arranged on the backing plate (12), and the direction of the notch (19) is the same as the moving direction of the fixing bracket (16).

10. The angle adjustment device for carbon-carbon bolt slotting according to any one of claims 1 to 9, characterized in that: The conveying mechanism and the adjusting mechanism are arranged in an installation shell (20). The installation shell (20) is arranged on a support plate (1). The conveyor belt surfaces of the first conveyor belt (4) on the conveying mechanism and the second conveyor belt (6) on the adjusting mechanism extend out of the installation shell (20). Cleaning pads (21) are arranged at the gaps between the first conveyor belt (4) and the second conveyor belt (6) and the installation shell (20). Both the first conveyor belt (4) and the second conveyor belt (6) are internal tooth conveyor belts.

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