Reciprocating feeding mechanism

Abstract

The reciprocating feeding mechanism comprises a frame assembly and a directional conveying belt arranged on the frame assembly, the directional conveying belt advances in the conveying direction, and the outer edge of the frame assembly is higher than the surface of the directional conveying belt so that materials can be limited on the conveying belt; the turning conveying belt is arranged on the frame assembly, adjacent to the directional conveying belt and located on the same plane with the directional conveying belt, and the turning conveying belt reciprocates in the conveying direction; the width of the directional conveying belt and the width of the turning conveying belt are 1.2-1.8 times of the width of materials. The chain plate is arranged at the end of the direction-changing conveying belt in the advancing direction, and an abutting plate, making contact with materials, on the chain plate is obliquely arranged, so that the length of the direction-changing conveying belt in the conveying direction is gradually reduced from the side close to the directional conveying belt to the other side away from the directional conveying belt. According to the scheme, no clamping stagnation in the conveying process is ensured, more materials can be fed at a time, an operator does not need to watch beside a production line all the time, the feeding amount is large, high efficiency is achieved, and the working intensity of the operator is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of feeding equipment, and more particularly to a reciprocating feeding mechanism. Background Art

[0002] Existing feeding equipment is a long straight conveyor line. Operators need to place materials, such as three-column shells, on the chain plate of the long straight conveyor line. However, due to the limitation of production space, the length of the conveyor line is limited, resulting in a small number of materials fed at one time. Personnel need to feed repeatedly, reducing production efficiency. Moreover, during the forward movement of the materials, there will be a phenomenon where two materials move forward in parallel and get stuck. Operators need to separate the stuck shells to make the conveyor line continue to operate normally. The transportation is unstable, and operators need to constantly pay attention to the transportation situation of the parts.

[0003] The existing feeding method has the following defects in actual use:

[0004] 1) The conveyor line is too long and occupies too much space. The existing conveyor line is a long straight conveyor line. Due to its long length, it will occupy a large space position.

[0005] 2) The quantity of materials fed at one time is limited. The existing conveyor line can feed about 15 materials at one time. Personnel need to feed repeatedly, which has a great impact on production efficiency.

[0006] 3) Material jamming is likely to occur during transportation. During the operation of the existing conveyor line, it is easy for two workpieces to push against each other and get stuck and unable to move. Operators need to separate them to continue the operation, which affects production efficiency. Summary of the Invention

[0007] To solve the problems of large space occupation and low feeding efficiency of the feeding structure, the present invention provides a reciprocating feeding mechanism, including:

[0008] A frame assembly;

[0009] A directional conveyor belt disposed on the frame assembly for transporting materials to an operating table. The directional conveyor belt advances along the conveying direction, and the outer edge of the frame assembly is higher than the surface of the directional conveyor belt to confine the materials on the conveyor belt.

[0010] A deflecting conveyor belt disposed on the frame assembly, adjacent to the directional conveyor belt and in the same plane, for transporting materials to the directional conveyor belt. The deflecting conveyor belt reciprocates along the conveying direction;

[0011] The width of the directional conveyor belt is 1.2 to 1.8 times the width of the material, and the width of the deflecting conveyor belt is 1.2 to 1.8 times the width of the material;

[0012] The chain plate is arranged at the end of the advancing direction of the deflecting conveyor belt to guide the material to move to the adjacent orienting conveyor belt. The abutting plate on the chain plate that contacts the material is inclined, so that the length of the deflecting conveyor belt in the conveying direction gradually decreases from the side close to the orienting conveyor belt to the side far from the orienting conveyor belt.

[0013] In some embodiments, the speed V at which the orienting conveyor belt advances in the conveying direction 定 is not less than the speed V at which the deflecting conveyor belt advances in the conveying direction 变进 , and the speed V at which the deflecting conveyor belt advances in the conveying direction 变进 is not less than its retreat speed V 变退 .

[0014] In some embodiments, the speed V at which the orienting conveyor belt advances in the conveying direction 定 and the speed V at which the deflecting conveyor belt advances in the conveying direction 变进 have the relationship: V 定 = 1.1V 变进 ; and the speed V at which the deflecting conveyor belt advances in the conveying direction 变进 and its retreat speed V 变退 have the relationship: V 变进 = 1.2V 变退 .

[0015] In some embodiments, the deflecting conveyor belt includes a first conveyor belt, a second conveyor belt, and a third conveyor belt distributed from the side close to the orienting conveyor belt to the side far from the orienting conveyor belt.

[0016] In some embodiments, the advancing speeds of the orienting conveyor belt, the first conveyor belt, the second conveyor belt, and the third conveyor belt in the conveying direction decrease in sequence.

[0017] In some embodiments, the width of the orienting conveyor belt is 1.5 times the width of the material, and the width of the deflecting conveyor belt is 1.5 times the width of the material.

[0018] In some embodiments, the abutting plate is a straight plate or a convex arc plate, and there is an angle greater than zero between the outermost tangent line of the arc plate far from the orienting conveyor belt and the frame tail plate of the frame assembly.

[0019] In some embodiments, there is an angle of 10° to 45° between the abutting plate and the frame tail plate of the frame assembly.

[0020] In some embodiments, there is an angle of 35° between the abutting plate and the frame tail plate of the frame assembly.

[0021] In some embodiments, a first motor and a second motor are further included. The first motor is connected to the directional conveyor belt and drives it to move forward along the conveying direction, and the second motor is connected to the reversing conveyor belt and drives it to reciprocate along the conveying direction.

[0022] The reciprocating feeding mechanism provided by the present invention conveys materials through the cooperation of the directional conveyor belt and the reversing conveyor belt. During the conveying process, the directional conveyor belt always moves forward to finally convey the materials to the operating table; while the reversing conveyor belt reciprocates by moving forward and then backward. The chain plates limit the farthest position of the materials conveyed on the reversing conveyor belt, and under the cooperative action of the inclined abutting plate, the reversing conveyor belt pushes the materials thereon to the directional conveyor belt. While setting the directional conveyor belt, a reversing conveyor belt adjacent to it is set, increasing the width of the conveying mechanism, enabling more materials to be accommodated simultaneously, thus greatly increasing the conveying volume of the materials, avoiding repeated feeding, and improving the feeding efficiency. Moreover, the above setting can reduce the length of the conveying line, thereby saving the occupied space of the feeding mechanism.

[0023] In addition, the widths of both the directional conveyor belt and the reversing conveyor belt are set to be 1.2 times to 1.8 times the width of the material. Therefore, when the materials are conveyed, they can be staggered from each other. Under the inclined action of the abutting plate, the materials on the reversing conveyor belt will generate a mutually pushing-in force. With the reciprocating movement of the reversing conveyor belt moving forward and then backward, the continuous internal pushing force between the materials and the acting force of the conveyor belt can push the materials on the reversing conveyor belt to the adjacent directional conveyor belt. The above solution of the present invention ensures no jamming during the conveying process, can load more materials at one time, and does not require the operator to always watch beside the production line, making the feeding volume large and efficient, and reducing the working intensity of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Shows an isometric schematic view of a reciprocating feeding mechanism according to an embodiment;

[0025] Figure 2 Shows an isometric schematic view of the feeding process of a reciprocating feeding mechanism according to an embodiment;

[0026] Figure 3 Shows a top view schematic view of a reciprocating feeding mechanism according to an embodiment;

[0027] Figure 4 Shows a top view schematic view of the feeding process of a reciprocating feeding mechanism according to an embodiment.

[0028] REFERENCE NUMERALS:

[0029] 10 is a frame component, 11 is a frame tail plate, 12 is a frame directional side plate, 13 is a frame deflecting side plate, 14 is an operating table; 20 is a directional conveyor belt; 30 is a deflecting conveyor belt; 40 is a chain plate, 41 is an abutting plate; 50 is a first motor; 60 is a second motor. Detailed implementation manners

[0030] The present disclosure will now be described with reference to several exemplary embodiments. It should be understood that these embodiments are described only to enable those of ordinary skill in the art to better understand and thus implement the present disclosure, rather than implying any limitation on the scope of the present disclosure.

[0031] As used herein, the term "comprising" and its variants are to be construed as open-ended terms meaning "including but not limited to". The term "based on" is to be construed as "at least partially based on". The terms "one embodiment" and "an embodiment" are to be construed as "at least one embodiment". The term "another embodiment" is to be construed as "at least one other embodiment". The orientation or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", etc. are based on the orientation or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit that the indicated devices, elements or components must have a specific orientation, or be constructed and operated in a specific orientation. And, in addition to being able to represent orientation or positional relationships, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present application can be understood according to specific circumstances. In addition, the terms "installed", "arranged", "provided with", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral structure; it may be a mechanical connection, or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, or there may be internal communication between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances. In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, the meaning of "a plurality" is two or more.

[0032] An embodiment of the present application provides a reciprocating feeding mechanism, including a frame component 10, a directional conveyor belt 20, a deflecting conveyor belt 30, and a chain plate 40.

[0033] The directional conveyor belt 20 is arranged on the frame assembly 10 and is used to convey materials to the operating table 14. The directional conveyor belt 20 advances along the conveying direction. The outer edge of the frame assembly 10 is higher than the surface of the directional conveyor belt 20 to confine the materials on the conveyor belt, thereby preventing the materials from falling during the conveying process. As Figure 1 shown, the directional conveyor belt 20 is located on one side of the frame assembly 10 close to the frame directional side plate 12. The length of the directional conveyor belt 20 exposed outside the frame assembly 10 for placing materials extends from the frame tail plate 11 of the frame assembly 10 to the operating table 14. As Figure 3 shown.

[0034] The reversing conveyor belt 30 is arranged on the frame assembly 10, adjacent to the directional conveyor belt 20 and in the same plane. It is used to convey materials onto the directional conveyor belt 20, so that the directional conveyor belt 20 conveys the materials to the operating table 14. During the conveying process, the reversing conveyor belt 30 makes a reciprocating motion along the conveying direction, that is, the reversing conveyor belt 30 advances sometimes and retreats sometimes. As Figure 1 shown, the reversing conveyor belt 30 is arranged between the directional conveyor belt 20 and the frame reversing side plate 13 of the frame assembly 10. When it is arranged, it is feasible to arrange one or more. This setting can reduce the length of the conveying line of the feeding mechanism and widen the conveying space at the same time, so as to avoid the feeding mechanism being too long while increasing the single - time conveying volume of materials and improving the conveying efficiency. The frame directional side plate 12, the frame tail plate 11 and the frame reversing side plate 13 of the frame assembly 10 are arranged on the outer periphery of the directional conveyor belt 20 and the reversing conveyor belt 30, and their heights are higher than the center of gravity of the materials. On the one hand, it forms the conveying space of the materials, and on the other hand, it prevents the materials from falling out of the feeding mechanism during the conveying process. The length of the reversing conveyor belt 30 exposed outside the frame assembly 10 for placing materials extends from the frame tail plate 11 of the frame assembly 10 to the abutting plate 41. As Figure 3 shown.

[0035] The chain plate 40 is arranged at the end of the reversing conveyor belt 30 in the advancing direction. The abutting plate 41 in contact with the materials is inclined, so that the length of the reversing conveyor belt 30 in the conveying direction gradually decreases from the side close to the directional conveyor belt 20 to the side far from the directional conveyor belt 20. As Figure 1 shown. Under the inclination of the abutting plate 41, the materials on the reversing conveyor belt 30 will generate a mutual inward pushing force. With the reciprocating motion of the reversing conveyor belt 30 advancing sometimes and retreating sometimes, the continuous inward pushing force between the materials and the acting force of the conveyor belt can push the materials on the reversing conveyor belt 30 to the adjacent directional conveyor belt 20. The above setting widens the feeding space of the feeding structure, so that the materials can be mutually pushed and moved in the direction of the directional conveyor belt 20. Therefore, while increasing the conveying volume, the high efficiency and smoothness of feeding are ensured.

[0036] The width of the above-mentioned directional conveyor belt 20 is 1.2 to 1.8 times the width of the material, and the width of the direction-changing conveyor belt 30 is 1.2 to 1.8 times the width of the material. At this time, only one material can be accommodated in the width direction of the directional conveyor belt 20 and the direction-changing conveyor belt 30, and two materials cannot be accommodated side by side. Therefore, during the conveying process, the materials can be staggered from each other, which facilitates the materials to enter the operation table 14 in sequence, avoids jamming during the conveying process, and makes the feeding more efficient.

[0037] In an embodiment of the present application, the width of the directional conveyor belt 20 is 1.5 times the width of the material, and the width of the direction-changing conveyor belt 30 is 1.5 times the width of the material. This enables the materials to be more orderly staggered on the conveyor belt and move forward more smoothly. Of course, the width of the directional conveyor belt 20 and the width of the direction-changing conveyor belt 30 can be set to be exactly the same, or different widths can be selected within the above range for conveying, all of which are within the protection scope of the present application.

[0038] In a preferred embodiment of the present application, the speed V at which the directional conveyor belt 20 advances along the conveying direction 定 is not less than the speed V at which the direction-changing conveyor belt 30 advances along the conveying direction 变进 , and the speed V at which the direction-changing conveyor belt 30 advances along the conveying direction 变进 is not less than its backward speed V 变退 . So that during the conveying process of the materials, there is a certain speed difference between the directional conveyor belt 20 and the direction-changing conveyor belt 30, and there is also a certain speed difference in the reciprocating movement of the direction-changing conveyor belt 30, so that there is a continuous internal thrust between the materials, and they can continuously push each other onto the directional conveyor belt 20.

[0039] In this embodiment, V 定 ≥V 变进 ≥V 变退 . Considering the stability of the materials on the conveyor belt during the conveying process and avoiding the materials that simultaneously contact the directional conveyor belt 20 and the direction-changing conveyor belt 30 from tipping over during the conveying process, it is necessary to limit the speed difference among V 定 , V 变进 and V 变退 . Preferably, 1.2V 变进 ≥V 定 ≥V 变进 , 1.35V 变退 ≥V 变进 ≥V 变退, the setting of this speed difference can generate sufficient driving force between adjacent materials, so as to realize the continuous and stable pushing of materials on the deflecting conveyor belt 30 towards the directional conveyor belt 20. By utilizing the speed difference between the directional conveyor belt 20 and the deflecting conveyor belt 30, and the speed difference during the forward and backward movement of the deflecting conveyor belt 30, and by using the inclined abutting plate 41, the materials close to the deflecting side plate 13 of the frame are moved to the directional conveyor belt 20 through mutual inward pushing. This setting achieves the effects of no jamming, large-batch feeding, and labor saving during the conveying process.

[0040] Specifically, the forward speed V of the directional conveyor belt 20 along the conveying direction 定 and the forward speed V of the deflecting conveyor belt 30 along the conveying direction 变进 are in the relationship of: V 定 = 1.1V 变进 ; the forward speed V of the deflecting conveyor belt 30 along the conveying direction 变进 and its backward speed V 变退 are in the relationship of: V 变进 = 1.2V 变退 . At this time, the conveying of materials and the mutual pushing between them are more stable. The above V 定 , V 变进 and V 变退 can also be the same speed, or two of them can be the same speed. At this time, relying on the reciprocating movement of the deflecting conveyor belt 30 and the inclined action of the abutting plate 41, the mutual pushing between materials can also be realized.

[0041] As a preferred solution, as Figure 3 shown, the deflecting conveyor belt 30 includes a first conveyor belt, a second conveyor belt, and a third conveyor belt distributed from the side close to the directional conveyor belt 20 to the side far from the directional conveyor belt 20, that is, the first conveyor belt is adjacent to the directional conveyor belt 20, and the third conveyor belt is adjacent to the deflecting side plate 13 of the frame. At this time, preferably, the forward speeds of the directional conveyor belt 20, the first conveyor belt, the second conveyor belt, and the third conveyor belt decrease in sequence along the conveying direction. And when the deflecting conveyor belt 30 is set to three, the length of the feeding mechanism can be greatly reduced, the feeding width is also greatly increased, and more materials can be conveyed at the same time, so the conveying efficiency is greater.

[0042] In addition, the forward speeds of the above-mentioned first conveyor belt, second conveyor belt, and third conveyor belt are respectively greater than their corresponding backward speeds, and the backward speeds of the first conveyor belt, second conveyor belt, and third conveyor belt also decrease in sequence. To maintain the speed difference between adjacent conveyor belts, so that the thrust between materials is more continuous, stable, and efficient. Of course, the number of the deflecting conveyor belt 30 can be specifically set according to the actual space and material size, and the present application does not make specific limitations.

[0043] In this embodiment, multiple parallel conveyor belts are provided. By reasonably controlling the forward and backward speeds of the conveyor belts, the width of the conveyor belts, and setting an inclination angle at the front end, it can ensure that there is no jamming during the conveying of materials. By increasing the width and reducing the length, space is also saved, and the quantity of materials loaded at one time by personnel is more. There is no jamming during the conveying process, avoiding the problem that personnel need to keep on duty all the time, enabling the operator to go to other processes to solve other problems, improving production efficiency, and saving labor.

[0044] In the embodiment of the present application, an included angle of 10° to 45° is provided between the abutting plate 41 and the frame end plate 11 of the frame assembly 10, as Figure 3 shown. This inclination range can enable the materials to be better pushed towards the directional conveyor belt 20 during the conveying process. Preferably, an included angle of 35° is provided between the abutting plate 41 and the frame end plate 11 of the frame assembly 10 to make the material pushing smoother and more efficient.

[0045] In a preferred embodiment of the present application, the abutting plate 41 can be set as a straight plate or a convex arc plate. When set as a straight plate, the structure is as Figure 2 and Figure 4 shown. From the end close to the directional conveyor belt 20 to the end fitting the frame deflecting side plate 13, it gradually approaches the direction of the frame end plate 11, so that the materials can be pushed towards the side of the directional conveyor belt 20 along this inclined direction under the action of the mutual pushing force. Preferably, the straight plate and the frame deflecting side plate 13 are smoothly connected by an arc. During the conveying process, in order to avoid the situation that the materials may get stuck and not move easily at this connection, the radian of this arc connection can be set as a circle with a diameter not less than the maximum width of the materials, or a certain number of circular protrusions can be provided at this arc connection to reduce the friction between the materials and the plate, so that it has a certain rolling force at the connection, thereby assisting the materials to move quickly and efficiently.

[0046] When set as an arc plate, the arc plate is a convex structure. Here, the convexity is towards the outside of the material placement space, towards the frame directional side plate 12 and the frame end plate 11. In addition, a non-zero included angle is provided between the outer tangent of the end of the arc plate close to the frame deflecting side plate 13 and the frame end plate 11 to ensure the inclination of the abutting plate 41 and avoid the materials getting stuck here and affecting the conveying. In the preferred solution, the included angle of the outer tangent of the arc plate with respect to the frame end plate 11 - here refers to the acute included angle - gradually increases from the end close to the frame deflecting side plate 13 to the end far from the frame deflecting side plate 13. This setting makes the materials on the deflecting conveyor belt 30 more and more smoothly and efficiently pushed towards the directional conveyor belt 20.

[0047] The reciprocating feeding mechanism of the present application further includes a first motor 50 and a second motor 60. The first motor 50 is connected to the directional conveyor belt 20 and drives it to move forward along the conveying direction. The second motor 60 is connected to the reversing conveyor belt 30 and drives it to reciprocate along the conveying direction. Of course, in addition to the second motor 60, other structures such as connecting rods and cylinders that can achieve reciprocating motion can also be used to drive the reversing conveyor belt 30 to move forward and backward, and the motor is the best choice.

[0048] In addition, it further includes a control device that can control the first motor 50 and the second motor 60. If the power device is other structures instead of a motor, the control device can also perform control. By controlling the power device, the forward and backward speeds of the directional conveyor belt 20 and the reversing conveyor belt 30 can be adjusted, and the duration of the forward and backward movement of the reversing conveyor belt 30 can also be adjusted, so as to make adaptive adjustments according to different material conditions, making the feeding process more efficient.

[0049] The reciprocating feeding mechanism provided by the embodiment of the present application transports materials through the cooperation of the directional conveyor belt 20 and the reversing conveyor belt 30. During the transportation process, the directional conveyor belt 20 always moves forward to finally transport the materials to the operation table 14; while the reversing conveyor belt 30 reciprocates by moving forward and backward from time to time. The chain plate 40 limits the farthest position of the materials transported on the reversing conveyor belt 30, and under the cooperative action of the inclined contact plate 41, the reversing conveyor belt 30 pushes the materials on it to the directional conveyor belt 20. By setting the directional conveyor belt 20 and the adjacent reversing conveyor belt 30 at the same time, the width of the conveying mechanism is increased, and more materials can be accommodated at the same time. Therefore, the material transportation volume is increased to a great extent, repeated feeding is avoided, and the feeding efficiency is improved. Moreover, the above setting can reduce the length of the conveying line, thereby saving the occupied space of the feeding mechanism.

[0050] In addition, the widths of both the directional conveyor belt 20 and the reversing conveyor belt 30 are set to be 1.2 to 1.8 times the width of the material. Therefore, when the materials are transported, they can be staggered from each other, and the situation of jamming caused by two parallel materials affecting subsequent transportation will not occur. Under the inclined action of the contact plate 41, the materials on the reversing conveyor belt 30 will generate a mutual inward pushing force. Combining with the reciprocating motion of the reversing conveyor belt 30 moving forward and backward from time to time, the continuous inward pushing force between the materials and the acting force of the conveyor belt can push the materials on the reversing conveyor belt 30 to the adjacent directional conveyor belt 20. The above solution of the embodiment of the present application ensures that there is no jamming during the transportation process, and more materials can be loaded at one time, and there is no need for the operator to always watch beside the production line, making the feeding volume large and efficient, and reducing the working intensity of the operator.

[0051] See Figure 2 and Figure 4, which is a schematic diagram of the feeding process when the material is a three-column shell. At this time, the placement space of the material is the area provided by all the conveyor belts. It can be seen that more three-column shells can be accommodated at the same time. Moreover, the material on the deflecting conveyor belt 30 located between the frame tail plate 11 and the abutting plate 41 is pushed to the directional conveyor belt 20 under the action of the driving force, and is conveyed to the operating table 14 through the channel between the frame directional side plate 12 and the chain plate 40 side plate opposite to the frame directional side plate 12 under the drive of the directional conveyor belt 20. The whole conveying process is smoother and more efficient, and at the same time, the labor intensity of the operator is greatly reduced.

[0052] Those of ordinary skill in the art can understand that the above embodiments are specific cases for implementing the present disclosure. In actual applications, various changes can be made to them in form and details without departing from the scope of the present disclosure.

Claims

1. A reciprocating feeding mechanism, characterized in that: include: Frame assembly (10); A directional conveyor belt (20) is arranged on the frame assembly (10) for conveying materials to the operating platform (14), the directional conveyor belt (20) moves along the conveying direction, and the outer edge of the frame assembly (10) is higher than the surface of the directional conveyor belt (20) to confine the materials on the conveyor belt; A direction-changing conveyor belt (30) is arranged on the frame assembly (10), adjacent to the directional conveyor belt (20) and located in the same plane as the directional conveyor belt (20), and is used to convey materials to the directional conveyor belt (20), and the direction-changing conveyor belt (30) reciprocates along the conveying direction; The width of the directional conveyor belt (20) is 1.2 to 1.8 times the width of the material, and the width of the direction-changing conveyor belt (30) is 1.2 to 1.8 times the width of the material; A chain plate (40) is arranged at the end of the direction of advance of the change-direction conveyor belt (30) to guide the material to move to the adjacent directional conveyor belt (20); a contact plate (41) on the chain plate (40) in contact with the material is arranged obliquely so that the length of the change-direction conveyor belt (30) in the conveying direction gradually decreases from one side close to the directional conveyor belt (20) to the other side away from the directional conveyor belt (20).

2. The reciprocating feeding mechanism according to claim 1, characterized in that: The directional conveyor belt (20) moves forward at a speed V along the conveying direction. 定 Not less than the speed V of the direction-changing conveyor belt (30) moving in the conveying direction 变进 The speed V of the changing conveyor belt (30) in the conveying direction is 变进 Not less than its retreat speed V 变退 .

3. The reciprocating feeding mechanism according to claim 2, characterized in that: The directional conveyor belt (20) moves forward at a speed V along the conveying direction. 定 The speed V of the changing conveyor belt (30) along the conveying direction 变进 The relationship is: V 定 =1.1V 变进 The speed V of the changing conveyor belt (30) in the conveying direction 变进 With its backward speed V 变退 The relationship is: V 变进 =1.2V 变退 .

4. The reciprocating feeding mechanism according to any one of claims 1 to 3, characterized in that: The change-of-direction conveyor belt (30) comprises a first conveyor belt, a second conveyor belt and a third conveyor belt distributed from one side close to the directional conveyor belt (20) to the other side away from the directional conveyor belt (20).

5. The reciprocating feeding mechanism according to claim 4, characterized in that: The speeds of the directional conveyor belt (20), the first conveyor belt, the second conveyor belt and the third conveyor belt moving in the conveying direction decrease in sequence.

6. The reciprocating feeding mechanism according to any one of claims 1 to 3, characterized in that: The width of the directional conveyor belt (20) is 1.5 times the width of the material, and the width of the direction-changing conveyor belt (30) is 1.5 times the width of the material.

7. The reciprocating feeding mechanism according to any one of claims 1 to 3, characterized in that: The abutment plate (41) is a straight plate or an outwardly convex arc-shaped plate, and an angle greater than zero is set between the outermost external tangent line of the arc-shaped plate away from the directional conveyor belt (20) and the frame tail plate (11) of the frame assembly (10).

8. The reciprocating feeding mechanism according to any one of claims 1 to 3, characterized in that: An included angle of 10° to 45° is set between the abutment plate (41) and the frame tail plate (11) of the frame assembly (10).

9. The reciprocating feeding mechanism according to claim 8, characterized in that: An included angle of 35° is set between the abutment plate (41) and the frame tail plate (11) of the frame assembly (10).

10. The reciprocating feeding mechanism according to any one of claims 1 to 3, characterized in that: It also includes a first motor (50) and a second motor (60), wherein the first motor (50) is connected to the directional conveyor belt (20) and drives it to move forward in the conveying direction, and the second motor (60) is connected to the change-direction conveyor belt (30) and drives it to reciprocate in the conveying direction.

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