A flour discharging structure for a noodle machine

Abstract

This invention discloses a flour feeding structure for a noodle machine, including an extrusion pipe and a screw rotatably disposed within the extrusion pipe. The extrusion pipe has a first opening. The structure also includes a rotating sleeve fitted onto the extrusion pipe to close the first opening. The rotating sleeve has a second opening and is rotatable relative to the extrusion pipe so that the second opening partially or completely overlaps with the first opening. The rotating sleeve rotates with the screw until it partially or completely overlaps with the second opening, and stops rotating. When the screw rotates in the opposite direction, the rotating sleeve rotates in the opposite direction until it reaches a preset angle and stops rotating. This invention requires only one drive source to drive the screw, saving the cost and space of the drive source for the rotating sleeve and making the entire feeding structure more compact.

Description

Technical Field

[0001] This invention relates to the field of kitchenware technology, and in particular to a flour feeding structure for a noodle machine. Background Technology

[0002] A noodle machine is a device that automatically kneads and shapes dough into noodles. It has a flour hopper at the top for storing and mixing flour. Before kneading, a certain amount of flour needs to be taken out, placed in the kneading hopper below, and an appropriate amount of water is added and mixed. After kneading, the dough is extruded and shaped.

[0003] As described in the utility model patent with announcement number "CN217958551U" and patent name "Noodle Making Mechanism and Noodle Machine", it includes: a shell, a dough mixing component, and a material feeding component. The shell is provided with a liquid chamber, a powder chamber, and a dough mixing chamber, and the liquid chamber and powder chamber are all connected to the dough mixing chamber. The dough mixing component is located in the dough mixing chamber and can process the materials in the dough mixing chamber. The material feeding component is located in the shell and is connected to the liquid chamber, powder chamber, and dough mixing chamber. The material feeding component can control the quantitative entry of materials from the liquid chamber and powder chamber into the dough mixing chamber.

[0004] As described in the aforementioned patent literature, the flour metering component includes a discharge port and a pusher screw. The forward and reverse rotation of the pusher screw and the opening and closing of the discharge port are supposed to be synchronous actions. However, due to limitations in the transmission structure, the two are not directly connected, thus requiring separate driving forces. Consequently, the noodle machine's feeding structure requires at least two motors to drive the pusher screw and discharge port respectively, resulting in a bulky structure and high production costs. Furthermore, the need for chip-controlled synchronous operation of the two motors further increases costs. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the prior art, the technical problem to be solved by the present invention is to propose a flour feeding structure for a noodle machine, which solves the problems of the prior art noodle machine feeding structure requiring separate motor drives for the discharge port and the push screw, resulting in a bulky structure and high cost.

[0006] The technical solution adopted by this invention to solve its technical problem is a flour feeding structure for a noodle machine, including an extrusion pipe and a screw rotatably disposed within the extrusion pipe, wherein the extrusion pipe is provided with a first opening, and further includes:

[0007] A rotating sleeve is fitted onto the extrusion pipe to close the first opening. The rotating sleeve has a second opening and can rotate relative to the extrusion pipe so that the second opening partially or completely overlaps with the first opening.

[0008] The rotating sleeve can rotate with the screw until the first opening and the second opening partially or completely overlap. When the screw rotates in the opposite direction, the rotating sleeve rotates in the opposite direction with the screw until it stops rotating at a preset angle.

[0009] Furthermore, a first permanent magnet is provided on the rotating sleeve, and a second permanent magnet is provided on the screw, wherein the magnetic pole of the first permanent magnet facing the second permanent magnet is opposite to the magnetic pole of the second permanent magnet approaching the first permanent magnet.

[0010] Furthermore, one of the rotating sleeve and the screw is provided with a permanent magnet, and the other is provided with a metal block that can be magnetically attracted.

[0011] Furthermore, the rotating sleeve is provided with a first electromagnet, and the screw is provided with a second electromagnet. When the first electromagnet and the second electromagnet are energized, the rotating sleeve rotates with the screw. When the first electromagnet and the second electromagnet are de-energized, the rotating sleeve remains stationary relative to the extrusion pipe.

[0012] Furthermore, one of the rotating sleeve and the screw is provided with an electromagnet, and the other is provided with a metal block.

[0013] Furthermore, the rotating sleeve is provided with a first elastic element, and the screw is provided with a second elastic element. The second elastic element can abut against the first elastic element and drive the rotating sleeve to rotate, and the second elastic element and the first elastic element can squeeze each other and move relative to each other.

[0014] Furthermore, one of the rotating sleeve and the screw is provided with an elastic element, and the other is provided with a stop block. The stop block can abut against the elastic element and move together, or squeeze the elastic element and move relative to the elastic element.

[0015] Furthermore, the rotating sleeve is provided with a limiting protrusion, and the extrusion pipe is provided with a limiting strip. When the rotating sleeve rotates to the point where the limiting protrusion abuts against the limiting strip, the rotation of the rotating sleeve in a clockwise or counterclockwise direction is locked. When the limiting protrusion abuts against one end of the limiting strip, the first opening coincides with the second opening.

[0016] Furthermore, the first opening is formed on the peripheral wall of the extrusion pipe, and the first opening faces directly downward;

[0017] The second opening is formed on the peripheral wall of the rotating sleeve and coincides with or is offset from the first opening.

[0018] Furthermore, the first opening is formed at the end of the extrusion pipe;

[0019] The second opening is formed at the end of the rotating sleeve and coincides with or is offset from the first opening.

[0020] Compared with the prior art, the present invention has at least the following beneficial effects:

[0021] (1) The opening and closing of the first opening are achieved by rotating the sleeve in both directions relative to the extrusion pipe, and the rotation of the sleeve in both directions is driven by the rotation of the screw in both directions. Therefore, only one drive source is needed to drive the screw to rotate, eliminating the need for an additional drive source to drive the sleeve, thus saving the cost and space of the drive source for the sleeve and making the entire feeding structure more compact. Moreover, there is no need to set up an additional chip to control the synchronous operation of the two drive sources, further reducing costs.

[0022] (2) After the feeding is completed, the screw needs to be reversed to drive the rotating sleeve to reverse and close the first opening. During this process, the reverse screw can drive the flour in the extrusion pipe to move backward (away from the direction of the first opening) a certain distance, thereby greatly reducing the amount of flour sticking to the first opening. When feeding again, when the rotating sleeve rotates forward, there will be no flour left at the first opening, which can effectively prevent flour from entering between the rotating sleeve and the extrusion pipe and causing the rotating sleeve to jam. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the flour feeding structure in the embodiment;

[0024] Figure 2 This is a schematic diagram of the rotating sleeve in the embodiment;

[0025] Figure 3 This is a schematic diagram of the extrusion pipe structure in the embodiment;

[0026] Figure 4 This is a schematic diagram of the screw structure in the embodiment;

[0027] In the picture:

[0028] 100. Extrusion pipe; 101. Limiting strip; 102. First opening; 110. Screw; 111. Second permanent magnet;

[0029] 200, Rotating sleeve; 210, Second opening; 220, Limiting protrusion; 230, First permanent magnet. Detailed Implementation

[0030] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0031] Example 1

[0032] Please refer to Figures 1-4 This invention discloses a flour feeding structure for a noodle machine, including an extrusion pipe 100 and a screw 110 rotatably disposed within the extrusion pipe 100. The extrusion pipe 100 has a first opening 102, and further includes:

[0033] A rotating sleeve 200 is sleeved on the extrusion pipe 100 to close the first opening 102. The rotating sleeve 200 has a second opening 210, and the rotating sleeve 200 can rotate relative to the extrusion pipe 100 so that the second opening 210 partially or completely overlaps with the first opening 102.

[0034] The rotating sleeve 200 can rotate with the screw 110 until the first opening 102 and the second opening 210 partially or completely overlap and then stop rotating. When the screw 110 rotates in the opposite direction, the rotating sleeve 200 rotates in the opposite direction with the screw 110 until it stops rotating at a preset angle.

[0035] Specifically, the rotating sleeve 200 is fitted onto the extrusion pipe 100 and can rotate relative to the extrusion pipe 100. The relative rotation of the two causes the first opening 102 and the second opening 210 to coincide or misalign, thereby opening or closing the first opening 102, allowing flour to fall from the first opening 102 for feeding. At the same time, the screw 110 rotates inside the extrusion pipe 100 to push the flour to move within the extrusion pipe 100 and fall from the first opening 102, thereby achieving continuous feeding of flour.

[0036] Specifically, the rotating sleeve 200 can rotate with the screw 110 to the position where the first opening 102 is opened (the first opening 102 and the second opening 210 are completely or partially overlapped), and the rotating sleeve 200 stops rotating with the screw 110 after stopping at this position. At this time, the screw 110 continues to rotate to realize the continuous conveying of flour, while the rotating sleeve 200 remains stationary, maintaining the open state of the first opening 102 to realize continuous feeding.

[0037] At the same time, after a certain amount of flour is taken out, the screw 110 reverses, and the rotating sleeve 200 rotates in the opposite direction with the screw 110 until the first opening 102 and the second opening 210 are completely misaligned. The rotating sleeve 200 then stops rotating, thereby closing the first opening 102.

[0038] In summary, this embodiment achieves the opening and closing of the first opening 102 by rotating the rotating sleeve 200 relative to the extrusion pipe 100 in both directions. The rotation of the rotating sleeve 200 relative to the extrusion pipe 100 is driven by the rotation of the screw 110 in both directions. Therefore, this embodiment only requires one drive source to drive the screw 110 to rotate, eliminating the need for an additional drive source to drive the rotating sleeve 200. This saves on the cost and space required for the drive source of the rotating sleeve 200, making the entire feeding structure more compact. Furthermore, the elimination of the need for an additional chip to control the synchronous operation of the two drive sources further reduces costs.

[0039] More specifically, after the feeding is completed, the screw 110 needs to be reversed, which in turn drives the rotating sleeve 200 to reverse and close the first opening 102. During this process, the reverse rotation of the screw 110 can move the flour in the extrusion pipe 100 backward (away from the first opening 102) a certain distance, thereby greatly reducing the amount of flour sticking to the first opening 102. During the next feeding, when the rotating sleeve 200 rotates forward, there will be no flour left at the first opening 102, which can effectively prevent flour from entering between the rotating sleeve 200 and the extrusion pipe 100 and causing the rotating sleeve 200 to jam.

[0040] Furthermore, a first permanent magnet 230 is provided on the rotating sleeve 200, and a second permanent magnet 111 is provided on the screw 110. The magnetic pole of the first permanent magnet 230 facing the second permanent magnet 111 is opposite to the magnetic pole of the second permanent magnet 111 near the first permanent magnet 230.

[0041] Specifically, a first permanent magnet 230 is provided at the bottom of the rotating sleeve 200, and a second permanent magnet 111 is provided at the end of the screw 110. The magnetic poles of the two ends of the first permanent magnet 230 and the second permanent magnet 111 that are close to each other are opposite, so that the first permanent magnet 230 and the second permanent magnet 111 attract each other, thereby creating a force between the rotating sleeve 200 and the screw 110 that brings them closer together. When the screw 110 rotates, it can drive the rotating sleeve 200 to rotate.

[0042] Furthermore, one of the rotating sleeve 200 and the screw 110 is provided with a permanent magnet, and the other is provided with a metal block that can be magnetically attracted.

[0043] Specifically, a permanent magnet can be set on the rotating sleeve 200 and a metal block can be set on the screw 110, or a metal block can be set on the rotating sleeve 200 and a permanent magnet can be set on the screw 110. The metal block and the permanent magnet have an attractive force, which can also achieve the purpose of the rotating sleeve 200 following the screw 110.

[0044] Furthermore, the rotating sleeve 200 is also provided with a limiting protrusion 220, and the extrusion pipe 100 is provided with a limiting strip 101. When the rotating sleeve 200 rotates to the point where the limiting protrusion 220 abuts against the limiting strip 101, the rotation of the rotating sleeve 200 in a clockwise or counterclockwise direction is locked. When the limiting protrusion 220 abuts against one end of the limiting strip 101, the first opening 102 coincides with the second opening 210.

[0045] The limiting protrusion 220 and the limiting strip 101 are configured so that when the rotating sleeve 200 rotates clockwise with the screw 110 to the position where the first opening 102 and the second opening 210 coincide, the limiting protrusion 220 abuts against one end of the limiting strip 101, thereby restricting the rotating sleeve 200 from continuing to rotate clockwise with the screw 110 and maintaining the open state of the first opening 102 for continuous material feeding; after the material feeding is completed, the rotating sleeve 200 rotates counterclockwise with the screw 110 until the first opening 102 and the second opening 210 are completely misaligned, and the limiting protrusion 220 abuts against the other end of the limiting strip 101, thereby restricting the rotating sleeve 200 from continuing to rotate counterclockwise with the screw 110 and preventing the rotating sleeve 200 from rotating counterclockwise to the position where the first opening 102 coincides with the second opening 210 again, thus maintaining the closed state of the first opening 102.

[0046] Furthermore, the first opening 102 is formed on the peripheral wall of the extrusion pipe 100, and the first opening 102 faces directly downward;

[0047] The second opening 210 is formed on the peripheral wall of the rotating sleeve 200 and coincides with or is offset from the first opening 102.

[0048] Specifically, the extrusion pipe 100 is arranged horizontally, with a first opening 102 located on the peripheral wall of the extrusion pipe 100 and a second opening 210 located on the side wall of the rotating sleeve 200. The screw 110 rotates within the extrusion pipe 100, causing the flour to move laterally within the extrusion pipe 100. When the flour moves to the first opening 102, it falls under its own gravity, thus achieving feeding. In this configuration, the permanent magnet or metal block is located at the end of the rotating sleeve 200, not in the same position as the second opening 210. The permanent magnet or metal block can be made circular to provide a larger and more uniform force.

[0049] Furthermore, the first opening 102 is formed at the end of the extrusion pipe 100;

[0050] The second opening 210 is formed at the end of the rotating sleeve 200 and coincides with or is misaligned with the first opening 102.

[0051] Specifically, the extrusion pipe 100 is arranged horizontally, with a first opening 102 at one end and a second opening 210 at the other end of the rotating sleeve 200. The screw 110 rotates within the extrusion pipe 100, causing the flour to move laterally within the pipe until it reaches the end. Continued rotation of the screw 110 then extrudes the flour from the end of the pipe 100 through the first opening 102, thus discharging the flour. In this configuration, a permanent magnet or metal block is positioned at the end of the rotating sleeve 200, at the same location as the second opening 210. The permanent magnet or metal block can be annular, with the second opening 210 located in a hollow circular section, preventing interference between the second opening 210 and the permanent magnet / metal block.

[0052] Furthermore, when the second opening 210 and the first opening 102 are located at the end, a semi-circular baffle can be provided at the end of the extrusion pipe 100, so that the other semicircle forms the first opening 102; a semi-circular baffle is also provided at the end of the rotating sleeve 200, and the other semicircle forms the second opening 210. When the two baffles overlap, the first opening 102 and the second opening 210 also overlap, so as to open the first opening 102 to realize material feeding; when the two baffles are misaligned, the first opening 102 and the second opening 210 are also misaligned, so as to close the first opening 102.

[0053] Example 2

[0054] In this embodiment, the rotating sleeve 200 is provided with a first electromagnet, and the screw 110 is provided with a second electromagnet. When the first electromagnet and the second electromagnet are energized, the rotating sleeve 200 rotates with the screw 110. When the first electromagnet and the second electromagnet are de-energized, the rotating sleeve 200 remains stationary relative to the extrusion pipe 100.

[0055] Specifically, the first and second electromagnets attract each other when energized, providing an attractive force to make the rotating sleeve 200 follow the screw 110. When the desired position is reached, the first and second electromagnets are de-energized. At this time, there is no longer a force between the rotating sleeve 200 and the screw 110, so the rotating sleeve 200 will no longer follow the screw 110, thereby realizing the continuous opening or closing of the first opening 102.

[0056] Since the rotating sleeve 200 will no longer rotate with the screw 110 after the first permanent magnet 230 and the second permanent magnet 111 are de-energized, there is no need to set a limiting structure (limiting protrusion 220 and limiting strip 101) for limiting, making the structure simpler.

[0057] Furthermore, one of the rotating sleeve 200 and the screw 110 is provided with an electromagnet, and the other is provided with a metal block.

[0058] Specifically, an electromagnet can be installed on the rotating sleeve 200 and a metal block can be installed on the screw 110, or a metal block can be installed on the rotating sleeve 200 and an electromagnet can be installed on the screw 110. Both methods can create an attraction between the rotating sleeve 200 and the screw 110, causing the rotating sleeve 200 to rotate with the screw 110.

[0059] Example 3

[0060] In this embodiment, the rotating sleeve 200 is provided with a first elastic element, and the screw 110 is provided with a second elastic element. The second elastic element can abut against the first elastic element and drive the rotating sleeve 200 to rotate, and the second elastic element and the first elastic element can squeeze each other and move relative to each other.

[0061] Specifically, the rotating sleeve 200 is provided with a first elastic element, and the screw 110 is provided with a second elastic element. When the limiting protrusion 220 is not abutting against the limiting strip 101, the second elastic element abuts against the first elastic element, allowing the rotating sleeve 200 to rotate with the screw 110. When it rotates to a preset position, the limiting protrusion 220 abuts against the limiting strip 101, making the force between the first and second elastic elements unable to overcome the force between the limiting protrusion 220 and the limiting strip 101. At this time, the first and second elastic elements press against each other, and the second elastic element moves relative to the first elastic element, allowing the screw 110 to continue rotating, while the rotating sleeve 200 no longer rotates with the screw 110 and remains at that position. In this way, the linkage between the rotating sleeve 200 and the screw 110 can also be achieved.

[0062] Furthermore, one of the rotating sleeve 200 and the screw 110 is provided with an elastic element, and the other is provided with a stop block. The stop block can abut against the elastic element and move together, or squeeze the elastic element and move relative to the elastic element.

[0063] Specifically, an elastic element can be provided on the rotating sleeve 200 and a stop block can be provided on the screw 110, or a stop block can be provided on the rotating sleeve 200 and an elastic element can be provided on the screw 110. During the rotation of the rotating sleeve 200 following the screw 110, the stop block moves against the elastic element, or the elastic element moves against the stop block; when the rotating sleeve 200 rotates to the point where the limiting protrusion 220 abuts against the limiting strip 101, the stop block squeezes the elastic element, and the two move relative to each other, so that the screw 110 can continue to rotate but the rotating sleeve 200 stays at that position.

[0064] Furthermore, the elastic element can be configured as an elastic protrusion or an elastic ring. Alternatively, the entire rotating sleeve 200 can be made of silicone material, so that the entire rotating sleeve 200 is compressed by the end of the screw 110, creating an interaction force between the screw 110 and the rotating sleeve 200. When the interaction force between the screw 110 and the rotating sleeve 200 is greater than the interaction force between the rotating sleeve 200 and the extrusion pipe 100, the rotating sleeve 200 can rotate with the screw 110; when the interaction force between the screw 110 and the rotating sleeve 200 is less than the interaction force between the rotating sleeve 200 and the extrusion pipe 100, the rotating sleeve 200 cannot rotate with the screw 110 and remains relatively stationary with respect to the extrusion pipe 100.

[0065] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0066] Furthermore, in this invention, descriptions involving terms such as "first," "second," and "a" are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0067] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0068] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

Claims

1. A flour feeding structure for a noodle machine, comprising an extrusion pipe and a screw rotatably disposed within the extrusion pipe, wherein the extrusion pipe has a first opening, characterized in that, Also includes: A rotating sleeve is fitted onto the extrusion pipe to close the first opening. The rotating sleeve has a second opening and can rotate relative to the extrusion pipe so that the second opening partially or completely overlaps with the first opening. The rotating sleeve can rotate with the screw until the first opening and the second opening partially or completely overlap. When the screw rotates in the opposite direction, the rotating sleeve rotates in the opposite direction with the screw until it stops rotating at a preset angle. The rotating sleeve is also provided with a limiting protrusion, and the extrusion pipe is provided with a limiting strip. When the rotating sleeve rotates to the point where the limiting protrusion abuts against the limiting strip, the rotation of the rotating sleeve in a clockwise or counterclockwise direction is locked. When the limiting protrusion abuts against one end of the limiting strip, the first opening coincides with the second opening. The rotating sleeve is provided with a first permanent magnet, and the screw is provided with a second permanent magnet. The magnetic pole of the first permanent magnet facing the second permanent magnet is opposite to the magnetic pole of the second permanent magnet facing the first permanent magnet.

2. A flour feeding structure for a noodle machine, comprising an extrusion pipe and a screw rotatably disposed within the extrusion pipe, wherein the extrusion pipe has a first opening, characterized in that, Also includes: A rotating sleeve is fitted onto the extrusion pipe to close the first opening. The rotating sleeve has a second opening and can rotate relative to the extrusion pipe so that the second opening partially or completely overlaps with the first opening. The rotating sleeve can rotate with the screw until the first opening and the second opening partially or completely overlap. When the screw rotates in the opposite direction, the rotating sleeve rotates in the opposite direction with the screw until it stops rotating at a preset angle. The rotating sleeve is also provided with a limiting protrusion, and the extrusion pipe is provided with a limiting strip. When the rotating sleeve rotates to the point where the limiting protrusion abuts against the limiting strip, the rotation of the rotating sleeve in a clockwise or counterclockwise direction is locked. When the limiting protrusion abuts against one end of the limiting strip, the first opening coincides with the second opening. One of the rotating sleeve and the screw is provided with a permanent magnet, and the other is provided with a metal block that can be magnetically attracted.

3. A flour feeding structure for a noodle machine, comprising an extrusion pipe and a screw rotatably disposed within the extrusion pipe, wherein the extrusion pipe has a first opening, characterized in that, Also includes: A rotating sleeve is fitted onto the extrusion pipe to close the first opening. The rotating sleeve has a second opening and can rotate relative to the extrusion pipe so that the second opening partially or completely overlaps with the first opening. The rotating sleeve can rotate with the screw until the first opening and the second opening partially or completely overlap. When the screw rotates in the opposite direction, the rotating sleeve rotates in the opposite direction with the screw until it stops rotating at a preset angle. The rotating sleeve is also provided with a limiting protrusion, and the extrusion pipe is provided with a limiting strip. When the rotating sleeve rotates to the point where the limiting protrusion abuts against the limiting strip, the rotation of the rotating sleeve in a clockwise or counterclockwise direction is locked. When the limiting protrusion abuts against one end of the limiting strip, the first opening coincides with the second opening. The rotating sleeve is provided with a first elastic element, and the screw is provided with a second elastic element. When the limiting protrusion does not abut against the limiting strip, the second elastic element abuts against the first elastic element and moves, so that the rotating sleeve can rotate with the screw. When the limiting protrusion abuts against the limiting strip, the first elastic element and the second elastic element squeeze each other, and the second elastic element moves relative to the first elastic element, so that the screw can continue to rotate.

4. A flour feeding structure for a noodle machine, comprising an extrusion pipe and a screw rotatably disposed within the extrusion pipe, wherein the extrusion pipe has a first opening, characterized in that, Also includes: A rotating sleeve is fitted onto the extrusion pipe to close the first opening. The rotating sleeve has a second opening and can rotate relative to the extrusion pipe so that the second opening partially or completely overlaps with the first opening. The rotating sleeve can rotate with the screw until the first opening and the second opening partially or completely overlap. When the screw rotates in the opposite direction, the rotating sleeve rotates in the opposite direction with the screw until it stops rotating at a preset angle. The rotating sleeve is also provided with a limiting protrusion, and the extrusion pipe is provided with a limiting strip. When the rotating sleeve rotates to the point where the limiting protrusion abuts against the limiting strip, the rotation of the rotating sleeve in a clockwise or counterclockwise direction is locked. When the limiting protrusion abuts against one end of the limiting strip, the first opening coincides with the second opening. The rotating sleeve is provided with an elastic element on one of the screws and a stop block on the other. As the rotating sleeve rotates with the screw, the stop block moves against the elastic element, or the elastic element moves against the stop block. When the rotating sleeve rotates to the point where the limiting protrusion abuts against the limiting strip, the stop block squeezes the elastic element, and the two move relative to each other, so that the screw can continue to rotate but the rotating sleeve stays at that position.

5. A flour feeding structure for a noodle machine according to claim 1, 2, 3, or 4, characterized in that, The first opening is formed on the peripheral wall of the extrusion pipe, and the first opening faces directly downward; The second opening is formed on the peripheral wall of the rotating sleeve and coincides with or is offset from the first opening.

6. A flour feeding structure for a noodle machine according to claim 1, 2, 3, or 4, characterized in that, The first opening is formed at the end of the extrusion tube; The second opening is formed at the end of the rotating sleeve and coincides with or is offset from the first opening.

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