Food feeding device for food packaging

Abstract

The invention relates to the technical field of food packaging, in particular to a food feeding device for food packaging. The walnut cake box conveying device comprises a conveying belt and a vertical frame, the vertical frame is arranged beside the conveying belt, and a plurality of walnut cake boxes are conveyed at the top of the conveying belt. Through the structural design of the feeding mechanism, walnut cake boxes can be stably and rapidly transferred from a conveying belt production line to a feeding carriage, the problems of collision, damage and the like possibly occurring in the manual carrying process are effectively avoided, meanwhile, the feeding efficiency is greatly improved, powerful support is provided for high-quality development of the walnut cake industry, and the economic benefit is improved. And through the structural design of the picking and placing mechanism, the device can control the gathering number of the walnut cake boxes on the first inclined guide rail, meanwhile, blockage generated at the joint of the conveying belt and the first inclined guide rail can be rapidly transferred to the first inclined guide rail, and rapid, accurate and automatic feeding operation is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of food packaging, in particular to a food loading device for food packaging. Background Art

[0002] Taosu, a traditional snack deeply rooted in Chinese culinary culture, has long enjoyed a place on the tongues of the public, beloved and highly praised by consumers of all ages. Its classic recipe utilizes premium ingredients, including finely textured, high-quality wheat flour, fresh, nutritious eggs, and pure, additive-free vegetable oil. This artful blend of high-quality ingredients imbues Taosu with a uniquely crisp texture and rich, mellow flavor, earning it a high reputation among the public and a shared memory across generations. From the silver-haired octogenarian to the tenderest child, the mention of Taosu brings a familiar and endearing feeling.

[0003] In today's teeming food market, the term "peach pastry" encompasses a vast array of categories and styles, some inheriting traditional methods while others innovating and refining them, each with its own distinct characteristics. Different brands, drawing on their own unique craftsmanship, meticulously craft peach pastry products with diverse flavors, alluring colors, and unique shapes. This not only enriches consumer choice but also fully satisfies the modern consumer's pursuit of food diversity and personalization.

[0004] From the production of peach cakes to the hands of consumers, the packaging process is equally important, and the role of the packaging machine is particularly critical. Typically, meticulously baked peach cakes are carefully placed in transparent plastic boxes. This design allows consumers to directly appreciate the peach cakes' beautiful appearance while effectively isolating them from adverse factors such as moisture and dust, preserving their freshness and taste. Subsequently, the staff will meticulously seal the lid of the box, marking the successful completion of the peach cakes' initial packaging process. However, there are still some areas for optimization in the delivery of peach cakes out of the factory. Specifically, when boxes filled with peach cakes need to be transported to a train for long-distance transportation, the current practice is to use a cart to transport them in small batches, and then rely on manual relays to move the boxes one by one to the train. This process is not only time-consuming but also labor-intensive, becoming a bottleneck in improving overall efficiency. To address this issue, we propose a food loading device for food packaging. Summary of the Invention

[0005] The object of the present invention is to provide a food loading device for food packaging to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] A food loading device for food packaging includes a conveyor belt and a stand. The stand is provided on one side of the conveyor belt. A plurality of peach cake boxes are conveyed on the top of the conveyor belt. A first oblique guide rail and a second oblique guide rail are fixed to one side of the stand, and the second oblique guide rail is located above the first oblique guide rail. One end of the first oblique guide rail is located below one end of the conveyor belt, and one end of the second oblique guide rail extends into the loading box. A loading mechanism is assembled on the inner side of the stand, and the loading mechanism is used to transport the peach cake boxes into the loading box.

[0008] Preferably, the feeding mechanism includes a power component and an auxiliary transport component, the power component is assembled on one side of the stand, and the auxiliary transport component is assembled on the inner side of the power component.

[0009] Preferably, the power assembly includes a transverse plate, a motor, a transverse shaft, a sprocket, a chain and a chain-linked shaft. Two transverse plates are fixed on one side of the vertical frame, a motor is fixed on one side of one of the transverse plates, the inner sides of the transverse plates are rotatably connected to the transverse shafts, the output end of the motor is fixed to one of the transverse shafts, a sprocket is fixed on one end of the transverse shafts, the outer sides of the two sprockets are connected to a chain, and the inner sides of the chains are evenly rotatably connected to multiple chain-linked shafts.

[0010] Preferably, a docking shaft is fixed on the inner side of the two chain linkage shafts, a cross plate is fixed at one end of the docking shaft, long guide columns are fixed at both ends of the cross plate, and short guide columns are fixed at the other two ends of the cross plate.

[0011] Preferably, the auxiliary transport component includes a partition, an annular guide groove, a vertical groove, a positioning plate and a bearing column. Two partitions are fixed on one side of the two horizontal plates. An annular guide groove is enclosed between the two partitions and the inner side of the vertical frame. The long guide columns are slidably connected to the annular guide groove. A vertical groove is opened on one side of the partition. The short guide column is slidably connected to the vertical groove. A positioning plate is fixed on the end of the docking shaft away from the cross plate, and multiple bearing columns are evenly fixed on one side of the positioning plate.

[0012] Preferably, the auxiliary transport component also includes a stop bar and a limit column, a stop bar is fixed at an end corner on one side of the positioning plate, a limit column is fixed at one end of the positioning plate, and the limit column is located above the supporting column, and the second oblique guide rail and the first oblique guide rail are both provided with an open notch at one end close to the stand, and the open notches are both loosely matched with the supporting column, the stop bar and the limit column.

[0013] Preferably, both ends of the two partitions close to each other are provided with inclined guide surfaces.

[0014] Preferably, a robotic arm is provided on one side of the conveyor belt, an equipment box is fixed to the output end of the robotic arm, and a pick-and-place mechanism is assembled on the inner side of the equipment box.

[0015] Preferably, the picking and placing mechanism includes an electric push rod, a first rack, a shell, a fan-shaped gear ring, a second rack, a connecting frame, a clamp and a toothed sleeve. An electric push rod is fixed to the inner side of the equipment box, and the output end of the electric push rod passes through the equipment box and is fixed with a first rack. The outer side of the first rack is slidably connected to the shell, and the shell is fixed to the equipment box. One end of the first rack is meshed and connected with the fan-shaped gear ring, and the fan-shaped gear ring is rotatably connected to the inner side of the shell. The outer side of the fan-shaped gear ring and the position deviating from the first rack are meshed and connected with the second rack. The second rack is slidably connected to the inner side of the shell, and one end of the shell is fixed with a connecting frame, and one end of the second rack is fixed with a toothed sleeve. The second rack and the toothed sleeve are both slidably connected to the inner side of the connecting frame, and the outer side of the connecting frame is evenly rotatably connected with a plurality of clamps, and one end of each clamp is meshed and connected with the toothed sleeve.

[0016] It can be seen without a doubt that the above-mentioned technical solution of this application can definitely solve the technical problem to be solved by this application.

[0017] At the same time, through the above technical solutions, the present invention has at least the following beneficial effects:

[0018] 1. Through the structural design of the feeding mechanism, the present invention enables the device to realize the smooth and rapid transfer of peach cake boxes from the conveyor belt production line to the feeding carriage, effectively avoiding problems such as collision and damage that may occur during manual handling, while greatly improving the feeding efficiency, and providing strong support for the high-quality development of the peach cake industry.

[0019] 2. The present invention uses the structural design of the pick-and-place mechanism to enable the device to control the number of peach cake boxes gathered on the first oblique guide track. At the same time, any blockage at the junction of the conveyor belt and the first oblique guide track can be quickly transferred to the first oblique guide track, thereby realizing fast, accurate and automated loading operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2Schematic diagram of the connection structure between the first oblique guide rail and the stand of the present invention;

[0023] Figure 3 This is a schematic diagram of the connection structure of the butt joint shaft and the cross plate of the present invention;

[0024] Figure 4 Schematic diagram of the connection structure of the transverse shaft and the sprocket of the present invention;

[0025] Figure 5 Schematic diagram of the connection structure between the horizontal plate and the vertical frame of the present invention;

[0026] Figure 6 Schematic diagram of the connection structure between the horizontal plate and the motor of the present invention;

[0027] Figure 7 It is a schematic cross-sectional view of the device box, housing and connecting frame of the present invention;

[0028] Figure 8 Schematic diagram of the connection structure between the robot arm and the equipment box of the present invention.

[0029] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0030] In the figure: 1. Conveyor belt; 2. Vertical frame; 3. Peach cake box; 4. First oblique guide rail; 5. Second oblique guide rail; 6. Loading car box; 7. Horizontal plate; 8. Motor; 9. Horizontal shaft; 10. Sprocket; 11. Chain; 12. Chain linkage shaft; 13. Docking shaft; 14. Cross plate; 15. Long guide column; 16. Short guide column; 17. Partition; 18. Annular guide groove; 19. Vertical groove; 20. Positioning plate; 21. Load-bearing column; 22. Bumper bar; 23. Limiting column; 24. Robotic arm; 25. Equipment box; 26. Electric push rod; 27. First rack; 28. Housing; 29. ​​Fan-shaped gear ring; 30. Second rack; 31. Connecting frame; 32. Clamp; 33. Toothed sleeve. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] Example 1

[0033] Reference Figure 1-6The first and second oblique guide rails 5 are arranged on one side of the conveyor belt 1, and the second oblique guide rails 5 are arranged on the other side of the conveyor belt 1.

[0034] The feeding mechanism includes a power assembly and an auxiliary transport assembly. The power assembly is installed on one side of the vertical frame 2, and the auxiliary transport assembly is installed on the inner side of the power assembly. The power assembly includes a transverse plate 7, a motor 8, a transverse shaft 9, a sprocket 10, a chain 11 and a chain linkage shaft 12. Two transverse plates 7 are fixed on one side of the vertical frame 2. A motor 8 is fixed on one side of one of the transverse plates 7. The inner sides of the transverse plates 7 are rotatably connected to the transverse shaft 9. The output end of the motor 8 is fixed to one of the transverse shafts 9. One end of the transverse shaft 9 is fixed to a sprocket 10. The outer sides of the two sprockets 10 are connected to a chain 11. The inner sides of the chains 11 are evenly rotatably connected to multiple chain linkage shafts 12. When the motor 8 is started, the output end of the motor 8 drives the transverse shaft 9 to rotate, thereby enabling the chain 11 to be transmitted.

[0035] A docking shaft 13 is fixed on the inner side of the two chain linkage shafts 12, a cross plate 14 is fixed at one end of the docking shaft 13, a long guide column 15 is fixed at both ends of the cross plate 14, and a short guide column 16 is fixed at the other two ends of the cross plate 14. The chain linkage shaft 12 is a conventional accessory of the chain 11, which plays the role of connecting the chain 11 as a whole.

[0036] The auxiliary transport component includes a partition 17, an annular guide groove 18, a vertical groove 19, a positioning plate 20 and a bearing column 21. Two partitions 17 are fixed on one side of the two horizontal plates 7. An annular guide groove 18 is enclosed between the two partitions 17 and the inner side of the vertical frame 2. The long guide columns 15 are slidably connected to the annular guide groove 18. A vertical groove 19 is opened on one side of the partition 17. The short guide column 16 is slidably connected to the vertical groove 19. The positioning plate 20 is fixed to the end of the docking shaft 13 away from the cross plate 14. A plurality of bearing columns 21 are evenly fixed on one side of the positioning plate 20. The bearing columns 21 are clearance-matched with the development notch. When the bearing columns 21 move with the positioning plate 20, there will be no motion interference between the bearing columns 21 and the development notch.

[0037] The auxiliary transport component also includes a stop bar 22 and a limit column 23. A stop bar 22 is fixed to an end corner on one side of the positioning plate 20. A limit column 23 is fixed to one end of the positioning plate 20, and the limit column 23 is located above the supporting column 21. The second oblique guide rail 5 and the first oblique guide rail 4 are both provided with open gaps at one end close to the stand 2. The open gaps are both gap-matched with the supporting column 21, the stop bar 22 and the limit column 23. Through the setting of the stop bar 22 and the limit column 23, the peach pastry box 3 is prevented from shifting sideways when moving along the motion trajectory of the chain 11, causing the peach pastry box 3 to fall from the supporting column 21.

[0038] Both ends of the two partitions 17 on the side close to each other are provided with inclined guide surfaces.

[0039] Example 2

[0040] Further optimize Example 1, specifically, as Figure 1 、 Figure 7 and Figure 8 As shown, a robotic arm 24 is provided on one side of the conveyor belt 1 , an equipment box 25 is fixed to the output end of the robotic arm 24 , and a pick-and-place mechanism is assembled inside the equipment box 25 .

[0041] The pick-and-place mechanism includes an electric push rod 26, a first rack 27, a housing 28, a sector gear ring 29, a second rack 30, a connecting frame 31, a clamping claw 32 and a toothed sleeve 33. The electric push rod 26 is fixed to the inside of the equipment box 25. The output end of the electric push rod 26 passes through the equipment box 25 and is fixed with the first rack 27. The outside of the first rack 27 is slidably connected with the housing 28. The housing 28 is fixed to the equipment box 25. One end of the first rack 27 is meshed with the sector gear ring 29. The sector gear ring 29 is rotatably connected to the inside of the housing 28. The outside of the sector gear ring 29 is meshed with the second rack 30 at a position deviating from the first rack 27. The second rack 30 is slidably connected to the inside of the housing 28. A connecting frame 31 is fixed to one end of the housing 28. A toothed sleeve 33 is fixed to one end of the second rack 30. The second rack 30 and the toothed sleeve 33 are both connected to the housing 25. The inner side of the connecting frame 31 is slidably connected, and the outer side of the connecting frame 31 is evenly distributed and rotatably connected with multiple clamps 32, one end of the clamps 32 is engaged with the toothed sleeve 33. When the conveyor belt 1 is blocked at the junction of the first oblique guide track 4, the electric push rod 26 is started, and the output end of the electric push rod 26 drives the first rack 27 to move, so that the first rack 27 engages the fan-shaped gear ring 29 to rotate, and then the fan-shaped gear ring 29 engages the second rack 30 to move synchronously, and the second rack 30 drives the toothed sleeve 33 to move, so that the toothed sleeve 33 engages one end of the clamps 32 to rotate, realizing the opening and closing action of multiple clamps 32, which is convenient for clamping or releasing the peach cake box 3. After grabbing the peach cake box 3, it can be directly placed in the first oblique guide track 4, which is convenient for quickly removing the blockage at the junction of the conveyor belt 1 and the first oblique guide track 4.

[0042] From the above, we can know that:

[0043] The present invention addresses the technical problem that there are still some areas that need to be optimized in the factory transportation link of peach cakes. Specifically, when boxes filled with peach cakes need to be transported to a carriage for long-distance transportation, the current practice is to use a small cart to transport them in batches, and then rely on manual relay to move the boxes one by one into the carriage. This process is not only time-consuming, but also consumes a lot of manpower, becoming a bottleneck for improving overall efficiency; the technical solutions of the above embodiments are adopted. At the same time, the implementation process of the above technical solution is:

[0044] The electrical components in this device are all existing technologies, and their models are only one of them. As long as the electrical components can achieve the purpose of this device, they can be used. All electrical components in the device are connected to their adapted power supplies through wires, and appropriate controllers should be selected according to actual conditions to meet control requirements. The specific connection and control sequence should refer to the following working principle, and the electrical connection between the electrical components is completed in the order of working. The detailed connection means are well known in the art. The following mainly introduces the working principle and process, and no further explanation of electrical control is given.

[0045] During use, the peach cake box 3 is transported by the conveyor belt 1. When the peach cake box 3 moves to the end of the conveyor belt 1, it falls into the first oblique guide track 4, and then moves along the inner side of the first oblique guide track 4 to the development gap, and then the motor 8 is started. The output end of the motor 8 drives the transverse shaft 9 to rotate. Because the transverse shaft 9 is fixed to the sprocket 10, and the sprocket 10 is connected by the chain 11, the chain 11 can be transmitted, and because the chain 11 is rotatably connected to the chain linkage shaft 12, the chain linkage shaft 12 is fixed to the docking shaft 13, the long guide column 15 is slidably connected to the annular guide groove 18, and the short guide column 16 is slidably connected to the vertical groove 19, so the chain linkage shaft 12 can drive the docking shaft 13 and the cross plate 14 to perform a circular motion along the inner side of the annular guide groove 18. When the long guide column 15 contacts the rounded corner inside the annular guide groove 18, it can be used for the long guide column 1 5 provides a guiding function, and at the same time, the short guide column 16 does not contact the annular guide groove 18, and the chain linkage shaft 12 itself does not rotate, so that the docking shaft 13 and the cross plate 14 can always maintain a stable state. When the docking shaft 13 drives the positioning plate 20 to move to below the development gap of the first oblique guide track 4, the docking shaft 13 drives the positioning plate 20 to continue to move, so that the supporting column 21 contacts the peach pastry box 3, lifts the peach pastry box 3, and separates the peach pastry box 3 from the development gap. After that, the peach pastry box 3 continues to be transported. When it moves to above the development gap of the second oblique guide track 5, the docking shaft 13 drives the positioning plate 20 to continue to move, so that the peach pastry box 3 contacts the development gap, supports the peach pastry box 3, and separates the peach pastry box 3 from the supporting column 21. At this time, the peach pastry box 3 moves along the inner side of the second oblique guide track 5 to the loading car box 6, and a loading and transportation operation can be completed.

[0046] Through the above configuration, this application can certainly solve the above technical problems and achieve the following technical effects:

[0047] 1. Through the structural design of the feeding mechanism of the present invention, the device can realize the smooth and rapid transfer of peach cake boxes 3 from the conveyor belt 1 production line to the feeding carriage 6, effectively avoiding the problems of collision and damage that may occur during manual handling, and at the same time greatly improving the feeding efficiency, providing strong support for the high-quality development of the peach cake industry.

[0048] 2. The present invention uses the structural design of the pick-and-place mechanism to enable the device to control the number of peach cake boxes 3 gathered on the first oblique guide track 4. At the same time, any blockage at the junction of the conveyor belt 1 and the first oblique guide track 4 can be quickly transferred to the first oblique guide track 4, thereby realizing fast, accurate and automated loading operations.

[0049] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0050] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. The preferred embodiments of the present invention are given in the accompanying drawings, but they do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions described in the aforementioned specific embodiments, or to make equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the present invention specification and drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present invention.

Claims

1. A food feeding device for food packaging, characterized in that: The invention comprises a conveyor belt (1) and a stand (2), wherein the stand (2) is provided on one side of the conveyor belt (1), a plurality of peach cake boxes (3) are conveyed on the top of the conveyor belt (1), a first oblique guide rail (4) and a second oblique guide rail (5) are fixed on one side of the stand (2), and the second oblique guide rail (5) is located above the first oblique guide rail (4), one end of the first oblique guide rail (4) is located below one end of the conveyor belt (1), and one end of the second oblique guide rail (5) extends into a loading box (6), and a loading mechanism is assembled on the inner side of the stand (2), and the loading mechanism is used to convey the peach cake boxes (3) into the loading box (6).

2. A food loading device for food packaging according to claim 1, characterized in that: The feeding mechanism comprises a power component and an auxiliary transport component. One side of the stand (2) is equipped with the power component, and the inner side of the power component is equipped with the auxiliary transport component.

3. A food loading device for food packaging according to claim 2, characterized in that: The power assembly comprises a transverse plate (7), a motor (8), a transverse shaft (9), a sprocket (10), a chain (11) and a chain linkage shaft (12); two transverse plates (7) are fixed on one side of the vertical frame (2); a motor (8) is fixed on one side of one of the transverse plates (7); the inner sides of the transverse plates (7) are rotatably connected to the transverse shaft (9); the output end of the motor (8) is fixed to one of the transverse shafts (9); one end of the transverse shaft (9) is fixed to a sprocket (10); the outer sides of the two sprockets (10) are connected to a chain (11); the inner sides of the chains (11) are evenly rotatably connected to a plurality of chain linkage shafts (12).

4. A food loading device for food packaging according to claim 3, characterized in that: A docking shaft (13) is fixed on the inner side of the two chain linkage shafts (12), a cross plate (14) is fixed on one end of the docking shaft (13), a long guide column (15) is fixed on both ends of the cross plate (14), and a short guide column (16) is fixed on the other two ends of the cross plate (14).

5. A food loading device for food packaging according to claim 4, characterized in that: The auxiliary transport component includes a partition (17), an annular guide groove (18), a vertical groove (19), a positioning plate (20) and a bearing column (21). Two partitions (17) are fixed on one side of the two transverse plates (7). An annular guide groove (18) is enclosed between the two partitions (17) and the inner side of the vertical frame (2). The long guide columns (15) are slidably connected to the annular guide groove (18). A vertical groove (19) is opened on one side of the partition (17). The short guide column (16) is slidably connected to the vertical groove (19). A positioning plate (20) is fixed on one end of the docking shaft (13) away from the cross plate (14). A plurality of bearing columns (21) are evenly distributed and fixed on one side of the positioning plate (20).

6. A food loading device for food packaging according to claim 5, characterized in that: The auxiliary transport component also includes a stop bar (22) and a limiting column (23), a stop bar (22) is fixed to an end corner of one side of the positioning plate (20), a limiting column (23) is fixed to one end of the positioning plate (20), and the limiting column (23) is located above the supporting column (21), and the second oblique guide rail (5) and the first oblique guide rail (4) are both provided with an open notch at one end close to the stand (2), and the open notch is clearance-matched with the supporting column (21), the stop bar (22) and the limiting column (23).

7. The food loading device for food packaging according to claim 5, characterized in that: Both ends of the two partitions (17) close to each other are provided with inclined guide surfaces.

8. The food loading device for food packaging according to claim 1, characterized in that: A mechanical arm (24) is provided on one side of the conveyor belt (1), a device box (25) is fixed to the output end of the mechanical arm (24), and a pick-and-place mechanism is assembled on the inner side of the device box (25).

9. A food loading device for food packaging according to claim 8, characterized in that: The pick-and-place mechanism comprises an electric push rod (26), a first rack (27), a housing (28), a sector gear ring (29), a second rack (30), a connecting frame (31), a clamping claw (32) and a gear sleeve (33). The electric push rod (26) is fixed on the inner side of the device box (25). The output end of the electric push rod (26) passes through the device box (25) and is fixed with the first rack (27). The outer side of the first rack (27) is slidably connected with the housing (28). The housing (28) is fixed to the device box (25). One end of the first rack (27) is meshed with the sector gear ring (29). The sector gear ring (29) ) is rotatably connected to the inner side of the housing (28), the outer side of the sector gear ring (29) is meshed with a second rack (30) at a position deviating from the first rack (27), the second rack (30) is slidably connected to the inner side of the housing (28), one end of the housing (28) is fixed with a connecting frame (31), one end of the second rack (30) is fixed with a toothed sleeve (33), the second rack (30) and the toothed sleeve (33) are both slidably connected to the inner side of the connecting frame (31), the outer side of the connecting frame (31) is evenly rotatably connected with a plurality of clamping claws (32), one end of each of the clamping claws (32) is meshed with the toothed sleeve (33).

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