Adjustable feeding device

Abstract

The utility model discloses an adjustable feeding device which comprises a box body, a lower feeding roller, an upper feeding roller, an upper transmission part and an adjusting seat, the lower feeding roller is rotationally connected to the box body and provided with a lower transmission part, the upper transmission part is rotationally connected to the box body and meshed with the lower transmission part, the upper feeding roller is rotationally connected to the adjusting seat, one end of the upper feeding roller is in sliding connection with the upper transmission part, and the other end of the upper feeding roller is in sliding connection with the adjusting seat. The adjusting seat can move along the box body, so that the upper feeding roller moves along the upper transmission part to be close to or far away from the lower feeding roller, and the adjusting seat is provided with a leveling mechanism capable of enabling the axis of the upper feeding roller to be parallel to the axis of the lower feeding roller. Due to the fact that the upper feeding roller is connected with the upper transmission part which is arranged on the box body and meshed with the lower transmission part in the sliding mode, the position of the upper transmission part is not changed when the upper feeding roller moves to be close to or away from the lower feeding roller, and the problems of abrasion and tooth clearance increase caused by collision between the upper transmission part and the lower transmission part are avoided. Due to the fact that the leveling mechanism enables the axis of the upper feeding roller to be parallel to the axis of the lower feeding roller, uneven thickness of the feeding gap is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical equipment, in particular to an adjustable feeding device. Background Art

[0002] A feeding device is a device for conveying materials, which includes two feeding rollers arranged up and down to form a feeding gap. There are meshing transmission teeth on the two feeding rollers. Among the two feeding rollers, one feeding roller is defined as the upper roller, and the other feeding roller is defined as the lower roller. Among the two transmission teeth, one transmission tooth is defined as the upper transmission tooth, and the other transmission tooth is defined as the lower transmission tooth. In the stamping process, it is necessary to lift the upper roller as a whole to relax it, and then lower it to reset during feeding. Since the transmission teeth are arranged at one end of the feeding roller, when the upper roller moves up, the upper transmission tooth moves up with the upper roller and disengages from the lower transmission tooth. When the upper roller moves down, the upper transmission tooth moves down with the upper roller and meshes with the lower transmission tooth. When the upper transmission tooth moves down and meshes with the lower transmission tooth, it will inevitably collide with the lower transmission tooth, causing wear of the upper / lower transmission teeth and an increase in the tooth gap, and ultimately leading to a decrease in the conveying accuracy of the feeding device. Summary of the Utility Model

[0003] The purpose of the utility model is to provide an adjustable feeding device to solve the problem that the upper transmission tooth of the existing feeding device is arranged at one end of the upper roller and moves up or down with the upper roller, and when the upper transmission tooth moves down and meshes with the lower transmission tooth, it collides with the lower transmission tooth, resulting in wear of the upper / lower transmission teeth and an increase in the tooth gap.

[0004] The utility model is realized by the following technical solutions:

[0005] The adjustable feeding device includes a box body, a lower feeding roller, an upper feeding roller, an upper transmission member and an adjusting seat. The lower feeding roller is rotatably connected to the box body and has a lower transmission part. The upper transmission member is rotatably connected to the box body and meshes with the lower transmission part. The upper feeding roller is rotatably connected to the adjusting seat and one end thereof is slidably connected to the upper transmission member. The adjusting seat can move along the box body to make the upper feeding roller move closer to or away from the lower feeding roller along the upper transmission member. The adjusting seat is provided with a leveling mechanism that can make the axis of the upper feeding roller parallel to the axis of the lower feeding roller.

[0006] Further, the axial direction of the lower feeding roller is defined as the left - right direction, and the direction in which the upper feeding roller moves closer to or away from the lower feeding roller is defined as the up - down direction. The leveling mechanism includes an adjusting rod and an adjusting block. The adjusting block is hung on the top of the box body. The adjusting rod extends vertically. One end of the adjusting rod is connected to the adjusting seat and the other end is threadedly connected to the adjusting block. There are 2 adjusting rods and 2 adjusting blocks. The two adjusting rods are opposite to each other left and right. When the adjusting seat moves along the box body, it drives the adjusting rod and the adjusting block to move up and down. When the adjusting block rotates relative to the adjusting rod, it makes the adjusting rod move up and down relative to the adjusting block.

[0007] Further, the box body has a connecting hole above the adjusting rod and a connecting block partially extending into the box body from the connecting hole. The connecting block has an insertion hole for the adjusting rod to be inserted. The adjusting block is hung on the connecting block and partially extends into the insertion hole and is threadedly connected to the adjusting rod.

[0008] Further, a connecting rod extending left and right is rotatably connected to the adjusting seat. The two adjusting rods are respectively arranged at the two axial ends of the connecting rod.

[0009] Further, a limiting mechanism is provided on the box body. The limiting mechanism limits the amplitude of the up - down movement of the adjusting rod and / or limits the left - right movement of the adjusting rod.

[0010] Further, the limiting mechanism includes a stop rod extending left and right provided on the box body and a limiting hole opened on the adjusting rod for the stop rod to be inserted. When the adjusting rod moves up and down relative to the box body, the stop rod slides along the limiting hole.

[0011] Further, the limiting mechanism further includes an outer abutting block and an inner abutting block. The outer abutting block is connected to the box body and is arranged at a left - right interval with the inner abutting block to form an assembly space for the adjusting rod to pass through. The stop rod connects the outer abutting block and the inner abutting block.

[0012] Further, the box body has a receiving cavity for accommodating the lower feeding roller, the upper feeding roller, the upper transmission member and the adjusting seat. An inner shell is provided in the receiving cavity and encloses an assembly cavity with the cavity wall. The upper transmission member and the lower transmission part are accommodated in the assembly cavity. The inner shell has a lower through - hole for the lower feeding roller to extend from the assembly cavity into the receiving cavity and an upper through - hole for the upper feeding roller to extend from the assembly cavity into the receiving cavity.

[0013] Further, the axial direction of the lower feeding roller is defined as the left - right direction, the direction in which the upper feeding roller moves closer to or away from the lower feeding roller is defined as the up - down direction. A power mechanism for driving the adjusting seat to move up and down is provided on the box body. The power mechanism includes a power roller, a cam, and a motor. The power roller extends left - right and is driven by the motor. The cam is sleeved on the power roller. When the power roller rotates, the cam pushes or releases the adjusting seat to make the adjusting seat move up and down. An air pressure spring is provided between the adjusting seat and the box body. The air pressure spring can make the adjusting seat move in a direction away from the lower feeding roller. There are 2 air pressure springs, and the two air pressure springs are arranged at intervals left - right. The air pressure springs and the leveling mechanism are arranged at intervals front - back.

[0014] Further, a first guiding groove is provided on one of the upper transmission member and the upper feeding roller, and a first guiding strip that is slidably engaged with the first guiding groove is provided on the other of them; and / or the upper transmission member has an upper transmission tooth that meshes with the lower transmission part and a universal joint that is slidably connected to the upper transmission tooth. A second guiding groove is provided on one of the universal joint and the upper transmission tooth, and a second guiding strip that is slidably engaged with the second guiding groove is provided on the other of them.

[0015] The advantages of this technical solution are as follows:

[0016] 1. By arranging the upper feeding roller on an adjusting seat that can move relative to the box body, one end of the upper feeding roller is slidably connected to an upper transmission member arranged on the box body and meshing with the lower transmission part. When the adjusting seat moves relative to the box body, it drives the upper feeding roller to slide along the upper transmission member to adjust the distance between the upper / lower feeding rollers. When the adjustable feeding device switches between the feeding state and the relaxation state, the position of the upper transmission member remains unchanged (the upper transmission member and the lower transmission part remain in the meshing state without separation). Therefore, it is avoided that the upper transmission tooth of the existing feeding equipment is arranged at one end of the upper roller and moves up or down with the upper roller. When the upper transmission tooth descends and meshes with the lower transmission tooth, it collides with the lower transmission tooth, resulting in wear of the upper / lower transmission teeth and an increase in the tooth clearance, thus extending the service life and transmission accuracy of the equipment.

[0017] 2. Also, since a leveling mechanism for making the axis of the upper feeding roller parallel to the axis of the lower feeding roller is provided on the adjusting seat, the axis of the upper feeding roller is made parallel to the axis of the lower feeding roller, avoiding uneven thickness of the feeding gap. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] To more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the attached drawings required for description in the embodiments.

[0020] Figure 1 is a perspective view of the adjustable feeding device disclosed in the embodiment;

[0021] Figure 2 is a top view of the adjustable feeding device disclosed in the embodiment;

[0022] Figure 3 is Figure 2 a cross-sectional view taken along line A-A in

[0023] Figure 4 is Figure 3 a partially enlarged view at position D in

[0024] Figure 5 is Figure 2 a cross-sectional view taken along line B-B in

[0025] Figure 6 is Figure 2 a cross-sectional view taken along line C-C in

[0026] Figure 7 is a perspective view of the adjustable feeding device disclosed in the embodiment (hiding part of the box body);

[0027] Figure 8 is an exploded view of the upper feeding roller and the upper transmission member in the embodiment;

[0028] Figure 9 is Figure 8 a partially enlarged view at position E in Specific embodiments

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the attached drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the protection scope of the present utility model.

[0030] Embodiment: As Figures 1-9As shown in the figure, the adjustable feeding device includes a box body 1, a lower feeding roller 2, an upper feeding roller 3, an upper transmission member 4, and an adjusting seat 5. The lower feeding roller 2 is rotatably connected to the box body 1 and has a lower transmission portion 201. The upper transmission member 4 is rotatably connected to the box body 1 and meshes with the lower transmission portion 201. The upper feeding roller 3 is rotatably connected to the adjusting seat 5 and one end thereof is slidably connected to the upper transmission member 4. The adjusting seat 5 can move along the box body 1 to make the upper feeding roller 3 move along the upper transmission member 4 closer to or away from the lower feeding roller 2. A leveling mechanism 6 is provided on the adjusting seat 5 to make the axis of the upper feeding roller 3 parallel to the axis of the lower feeding roller 2. Among them, when the upper feeding roller 3 moves along the upper transmission member 4 closer to or away from the lower feeding roller 2, the feeding distance between the upper feeding roller 3 and the lower feeding roller 2 is adjusted, so that the adjustable feeding device can be switched between the feeding state and the relaxation state. Among them, the axial direction of the lower feeding roller 2 is defined as the left-right direction, and the direction in which the upper feeding roller 3 moves closer to or away from the lower feeding roller 2 is defined as the up-down direction. This embodiment provides an adjustable feeding device to solve the problem that the upper transmission teeth of the existing feeding equipment are provided at one end of the upper roller and move up or down with the upper roller. When the upper transmission teeth move down and mesh with the lower transmission teeth, they collide with the lower transmission teeth, resulting in wear of the upper / lower transmission teeth and an increase in the tooth clearance. The main solution is to configure the upper feeding roller 3 on the adjusting seat 5 that can move relative to the box body 1. One end of the upper feeding roller 3 is slidably connected to the upper transmission member 4 that is arranged on the box body 1 and meshes with the lower transmission portion 201. When the adjusting seat 5 moves relative to the box body 1, it drives the upper feeding roller 3 to slide along the upper transmission member 4 to adjust the distance between the upper / lower feeding rollers, so that the adjustable feeding device can be switched between the feeding state and the relaxation state. Since the upper feeding roller 3 is slidably connected to the upper transmission member 4 that is arranged on the box body 1 and meshes with the lower transmission portion 201, the position of the upper transmission member 4 remains unchanged when the upper feeding roller 3 moves closer to or away from the lower feeding roller 2 (the upper transmission member 4 and the lower transmission portion 201 remain in the meshing state and do not separate). Therefore, it is possible to avoid the problem that the upper transmission teeth of the existing feeding equipment are provided at one end of the upper roller and move up or down with the upper roller. When the upper transmission teeth move down and mesh with the lower transmission teeth, they collide with the lower transmission teeth, resulting in wear of the upper / lower transmission teeth and an increase in the tooth clearance, and extend the service life and transmission accuracy of the equipment. Also, since a leveling mechanism 6 is provided on the adjusting seat 5 to make the axis of the upper feeding roller 3 parallel to the axis of the lower feeding roller 2, the axis of the upper feeding roller 3 is made parallel to the axis of the lower feeding roller 2, avoiding uneven thickness of the feeding gap.

[0031] In the embodiment of the present utility model, the leveling mechanism 6 includes an adjusting rod 601 and an adjusting block 602. The adjusting block 602 is hung on the top of the box body 1. The adjusting rod 601 extends vertically. One end of the adjusting rod 601 is connected to the adjusting seat 5 and the other end is threadedly connected to the adjusting block 602. There are 2 adjusting rods 601 and 2 adjusting blocks 602. The two adjusting rods 601 are opposite to each other left and right. When the adjusting seat 5 moves up and down, it drives the adjusting rod 601 and the adjusting block 602 to move up and down. When the adjusting block 602 rotates relative to the adjusting rod 601, the adjusting rod 601 moves up and down relative to the adjusting block 602. The above setting configures the leveling mechanism 6 as an adjusting block 602 hung on the top of the box body 1 and an adjusting rod 601 that extends vertically, with one end connected to the adjusting seat 5 and the other end threadedly connected to the adjusting block 602. Therefore, the height of the axial two ends of the upper feeding roller 3 can be adjusted by rotating the adjusting block 602, so that the axis of the upper feeding roller 3 is parallel to the axis of the lower feeding roller 2. The leveling structure is simple and easy to implement. At the same time, when the upper feeding roller 3 moves up and down relative to the lower feeding roller 2, its axis can still maintain a state parallel to the axis of the lower feeding roller 2.

[0032] In the embodiment of the present utility model, the box body 1 has a connecting hole (not marked in the figure) located above the adjusting rod 601 and a connecting block 102 partially extending into the box body 1 from the connecting hole. The connecting block 102 has an insertion hole 103 for the adjusting rod 601 to insert. The adjusting block 602 is hung on the connecting block 102 and partially extends into the insertion hole 103 and is threadedly connected to the adjusting rod 601. The above setting configures the connecting block 102 on the box body 1 for the adjusting block 602 to hang on and be inserted with the adjusting rod 601, making the connection between the adjusting block 602, the adjusting rod 601 and the box body 1 compact and stable.

[0033] In the embodiment of the present utility model, a connecting rod 7 extending left and right is rotatably connected to the adjusting seat 5. The two adjusting rods 601 are respectively arranged at the axial two ends of the connecting rod 7. The above setting rotatably connects the connecting rod 7 connected to the two adjusting rods 601 to the adjusting seat 5, so that when the adjusting seat 5 moves up and down along the adjusting rod 601, it moves up and down and rotates relative to the connecting rod 7. That is, the movement track formed by the up and down movement of the adjusting seat 5 can be an arc extending up and down.

[0034] In the embodiment of the present utility model, a limiting mechanism 8 is provided on the box body 1. The limiting mechanism 8 limits the amplitude of the up and down movement of the adjusting rod 601. Specifically, the limiting mechanism 8 includes a stop rod 801 extending left and right provided on the box body 1 and a limiting hole 802 opened on the adjusting rod 601 for the stop rod 801 to insert. The limiting hole 802 extends vertically. When the adjusting rod 601 moves up and down relative to the box body 1, the stop rod 801 slides along the limiting hole 802. The above setting sets the stop rod 801 extending left and right on the box body 1 and the limiting hole 802 provided on the adjusting rod 601 to cooperate with the stop rod 801 to limit the amplitude of the up and down movement of the adjusting rod 601, making the up and down movement of the adjusting rod 601 stable and smooth, and avoiding excessive movement of the adjusting rod 601.

[0035] In the embodiment of the present utility model, the limiting mechanism 8 restricts the left - right movement of the adjusting rod 601. The limiting mechanism 8 further includes an outer abutting block 803 and an inner abutting block 804. The outer abutting block 803 is connected to the box body 1 and is arranged at a left - right interval with the inner abutting block 804 to form an assembly space (not marked in the figure) for the adjusting rod 601 to pass through. The stop rod 801 connects the outer abutting block 803 and the inner abutting block 804. Since the limiting mechanism 8 further includes the outer abutting block 803 and the inner abutting block 804, and the stop rod 801 connects the outer abutting block 803 and the inner abutting block 804, the left - right swaying of the adjusting rod 601 is restricted, improving the stability and accuracy of leveling.

[0036] In the embodiment of the present utility model, the box body 1 has a receiving cavity 104 for accommodating the lower feeding roller 2, the upper feeding roller 3, the upper transmission member 4 and the adjusting seat 5. An inner shell 106 that encloses an assembly cavity 105 with its cavity wall is provided in the receiving cavity 104. The upper transmission member 4 and the lower transmission part 201 are accommodated in the assembly cavity 105. The inner shell 106 has a lower through - hole 107 for the lower feeding roller 2 to extend from the assembly cavity 105 into the receiving cavity 104 and an upper through - hole 108 for the upper feeding roller 3 to extend from the assembly cavity 105 into the receiving cavity 104. Through the above - mentioned setting, by configuring the inner shell 106 that encloses the assembly cavity 105 with the cavity wall of the receiving cavity 104 in the receiving cavity 104, and the upper transmission member 4 and the lower transmission part 201 are accommodated in the assembly cavity 105, the transmission components of the adjustable feeding device are accommodated in the same space, and the assembly is compact and reasonable.

[0037] In the embodiment of the present utility model, a power mechanism 9 for driving the adjusting seat 5 to move up and down is provided on the box body 1. The power mechanism 9 includes a power roller 901, a cam 902 and a motor 903. The power roller 901 extends left - right and is driven by the motor 903. The cam 902 is sleeved on the power roller 901. When the power roller 901 rotates, the cam 902 pushes against or releases the adjusting seat 5 to make the adjusting seat 5 move up and down. Among them, when the cam 902 abuts against the adjusting seat 5, the adjusting seat 5 moves down, and when the cam 902 releases the adjusting seat 5, the adjusting seat 5 moves up. Through the above - mentioned setting, by configuring the power mechanism 9 as the power roller 901 and the cam 902 sleeved on the power roller 901, and realizing the up - and - down movement of the adjusting seat 5 by the cam 902 pushing against or releasing the adjusting seat 5, the driving structure is simple and easy to implement.

[0038] In the embodiment of the present utility model, a first guiding groove 403 is provided on one of the upper driving member 4 and the upper feeding roller 3, and a first guiding bar 301 slidably engaged with the first guiding groove 403 is provided on the other one of them. The upper driving member 4 has an upper driving tooth 401 engaged with the lower driving portion 201 and a universal joint 402 slidably connected to the upper driving tooth 401. A second guiding groove 404 is provided on one of the universal joint 402 and the upper driving tooth 401, and a second guiding bar 405 slidably engaged with the second guiding groove 404 is provided on the other one of them. The above arrangement enables the upper feeding roller 3 to move closer to or away from the lower feeding roller 2 along a vertical line or an arc extending vertically up and down, with a high degree of freedom of movement.

[0039] In the embodiment of the present utility model, an air pressure spring 10 is provided between the adjusting seat 5 and the box body 1. The air pressure spring 10 causes the adjusting seat 5 to move in a direction away from the lower feeding roller 2. There are 2 air pressure springs 10, which are arranged at intervals left and right, and the air pressure springs 10 and the leveling mechanism 6 are arranged at intervals front and back. The above arrangement is by providing the air pressure spring 10 between the adjusting seat 5 and the box body 1, and the air pressure spring 10 causes the adjusting seat 5 to move in a direction away from the lower feeding roller 2. Therefore, when the cam 902 releases the adjusting seat 5, the adjusting seat 5 can move in a direction away from the lower feeding roller 2, so that the adjustable feeding device is switched to the relaxed state. Also, since there are 2 air pressure springs 10 and the air pressure springs 10 and the leveling mechanism 6 are arranged at intervals front and back, the movement of the adjusting seat 5 is made stable.

[0040] It should be understood that in the present utility model, terms such as "first" and "second" are used to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present utility model, the "first" information can also be called the "second" information, and similarly, the "second" information can also be called the "first" information. In addition, the orientation or positional relationship indicated by terms such as "center of the circle", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0041] As described above, one or more implementation manners are provided in combination with specific contents, and it is not determined that the specific implementation of the present utility model is only limited to these descriptions. Any approximation, similarity to the method, structure, etc. of the present utility model, or several technical deductions or replacements made under the premise of the concept of the present utility model should be regarded as within the protection scope of the present utility model.

Claims

1. Adjustable feeding device, characterized in that: It includes a box body, a lower feed roller, an upper feed roller, an upper transmission member and an adjustment seat, the lower feed roller is rotatably connected to the box body and has a lower transmission part, the upper transmission member is rotatably connected to the box body and meshes with the lower transmission part, the upper feed roller is rotatably connected to the adjustment seat and one end is slidably connected to the upper transmission member, the adjustment seat can move along the box body to make the upper feed roller move along the upper transmission member close to or away from the lower feed roller, and the adjustment seat is provided with a leveling mechanism that can make the axis of the upper feed roller parallel to the axis of the lower feed roller.

2. The adjustable feeding device according to claim 1, characterized in that: The axial direction of the lower feed roller is defined as the left-right direction, the direction in which the upper feed roller moves closer to or away from the lower feed roller is defined as the up-down direction, the leveling mechanism includes an adjusting rod and an adjusting block, the adjusting block is hung on the top of the box, the adjusting rod extends up and down, one end of the adjusting rod is connected to the adjusting seat and the other end is threadedly connected to the adjusting block, there are two adjusting rods and two adjusting blocks, and the two adjusting rods are opposite to each other. When the adjusting seat moves along the box body, the adjusting rod and the adjusting block are driven to move up and down. When the adjusting block rotates relative to the adjusting rod, the adjusting rod is driven to move up and down relative to the adjusting block.

3. The adjustable feeding device according to claim 2, characterized in that: The box body has a connecting hole located above the adjusting rod and a connecting block partially extending from the connecting hole into the box body, the connecting block has a socket for inserting the adjusting rod, the adjusting block is hung on the connecting block and partially extends into the socket to be threadedly connected with the adjusting rod.

4. The adjustable feeding device according to claim 2, characterized in that: The adjusting seat is rotatably connected with a connecting rod extending left and right, and the two adjusting rods are respectively arranged at two axial ends of the connecting rod.

5. The adjustable feeding device according to claim 2, characterized in that: The box body is provided with a limiting mechanism, and the limiting mechanism limits the upward and downward movement of the adjusting rod and / or limits the left and right movement of the adjusting rod.

6. The adjustable feeding device according to claim 5, characterized in that: The limiting mechanism comprises a stop rod extending left and right on the box body and a limit hole provided on the adjusting rod for the stop rod to be inserted into. When the adjusting rod moves up and down relative to the box body, the stop rod slides along the limit hole.

7. The adjustable feeding device according to claim 6, characterized in that: The limiting mechanism also includes an outer resistance block and an inner resistance block. The outer resistance block is connected to the box body and is spaced to the left and right of the inner resistance block to form an assembly space for the adjustment rod to pass through. The stop rod connects the outer resistance block and the inner resistance block.

8. The adjustable feeding device according to claim 1, characterized in that: The box body has a receiving cavity for receiving the lower feed roller, the upper feed roller, the upper transmission member and the adjustment seat. The receiving cavity is provided with an inner shell which is surrounded by the cavity wall to form an assembly cavity. The upper transmission member and the lower transmission part are accommodated in the assembly cavity. The inner shell has a lower through hole for the lower feed roller to extend from the assembly cavity into the receiving cavity and an upper through hole for the upper feed roller to extend from the assembly cavity into the receiving cavity.

9. The adjustable feeding device according to claim 1, characterized in that: The axial direction of the lower feed roller is defined as the left-right direction, and the direction in which the upper feed roller moves closer to or away from the lower feed roller is defined as the up-down direction. The box body is provided with a power mechanism that drives the adjustment seat to move up and down, and the power mechanism includes a power roller, a cam and a motor. The power roller extends left and right and is driven by the motor. The cam is arranged on the power roller, and when the power roller rotates, the cam pushes or releases the adjustment seat to make the adjustment seat move up and down; A gas pressure spring is arranged between the adjustment seat and the box body, and the gas pressure spring can move the adjustment seat in a direction away from the lower feeding roller. There are two gas pressure springs, and the two gas pressure springs are arranged at intervals on the left and right. The gas pressure spring and the leveling mechanism are arranged at intervals on the front and back.

10. The adjustable feeding device according to claim 1, characterized in that: One of the upper transmission member and the upper feeding roller is provided with a first guide groove, and the other of the upper transmission member and the upper feeding roller is provided with a first guide strip slidably matched with the first guide groove; And / or the upper transmission member has an upper transmission tooth meshing with the lower transmission part and a universal member slidably connected to the upper transmission tooth, one of the universal member and the upper transmission tooth is provided with a second guide groove, and the other of the two is provided with a second guide strip slidably matched with the second guide groove.

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