Automatic feeding device for oven

Abstract

The present invention relates to the field of feeding and conveying technology, and proposes an automatic feeding device for an oven, comprising a housing, an electric push rod and a motor mounted on either side of the housing, a first synchronous wheel fixedly connected to the upper portion of the output shaft of the motor, a first screw fixedly mounted on the first synchronous wheel, a damping shaft mounted on the electric push rod, a docking rod fixedly connected to the damping shaft, a fixed rod fixedly connected to the docking rod, an inner rod attached to the outer side of the fixed rod, a vortex spring mounted on the outer side of the inner rod, and a second synchronous wheel mounted on the outer side of the vortex spring. The above technical solution solves the problem that the existing feeding device cannot automatically reset the first connecting plate and the second connecting plate used for discharging after switching the feeding and discharging actions, and cannot automatically and slowly discharge the steam in the device to the outside during the feeding process.

Description

Technical Field

[0001] The present invention relates to the technical field of feeding and conveying, and in particular to an automatic feeding device for an oven. Background Art

[0002] An oven is a device used to heat and dry materials or samples. The oven heats the materials by providing a stable temperature environment to remove moisture or water from them, or to bring them to the required temperature state. After drying is completed, a loading device is needed to dry the next batch of materials. Therefore, a loading device is required. Existing loading devices still have some defects when used.

[0003] For example, the automatic loading device for ovens disclosed in publication number CN105108745B adopts a "one-to-two" method for automatic loading, that is, only one loading device is needed to complete the loading of two ovens, thereby improving the utilization rate of the loading device. However, this patent cannot accurately adjust the loading position, and cannot automatically and slowly discharge the steam in the device during the loading process, posing a safety hazard when the cover is opened. Summary of the Invention

[0004] The invention provides an automatic feeding device for an oven, which can accurately adjust the feeding position.

[0005] The technical solutions of the present invention are as follows:

[0006] An automatic feeding device for an oven, wherein an electric push rod and a motor are respectively installed on both sides of the shell, the output shaft of the motor is fixedly connected to a first synchronous wheel, the first synchronous wheel is fixedly installed with a first screw, the electric push rod is installed with a damping shaft, the damping shaft is fixedly connected with a docking rod, the docking rod is fixedly connected with a fixing rod, an inner rod is attached to the outer side of the fixing rod, a vortex spring is installed on the outer side of the inner rod, a second synchronous wheel is installed on the outer side of the vortex spring, the surfaces of the second synchronous wheel and the inner rod are respectively provided with a first docking groove and a second docking groove for docking with the docking rod, a synchronous belt is installed between the second synchronous wheel and the first synchronous wheel, and a spline rod is fixedly connected to the fixing rod , a second screw is provided on the outer side of the spline rod, and the first screw and the second screw are rotatably connected to the outer shell, and a material port assembly suitable for opening or closing the material port of the oven is installed between the first screw and the second screw, and the second screw and the inner rod are coaxially fixedly connected, and a first outer bushing movably installed on the first screw, and a first connecting plate is fixedly connected below the first outer bushing, and a push plate suitable for acting on the material port assembly to open or close the material port of the oven is fixedly provided on the lower side of the first connecting plate, and a second outer bushing movably installed on the second screw, and a second connecting plate is fixedly connected to the second outer bushing, and a material temporary storage bin surrounded by an outer baffle is fixedly connected above the second connecting plate.

[0007] As a preferred solution of the present invention, in order to realize the function of exhaust before feeding, the feed port assembly includes an exhaust hole and a feed port opened above the outer shell, the exhaust hole is connected with the air port of the oven, and the feed port is connected with the feed port of the oven, and a slide plate for opening or closing the feed port is provided above the feed port, and the connection between the slide plate and the outer shell is a sliding connection, a support spring is fixedly provided on the slide plate, and a fixing frame is fixedly connected to the outer shell, the support spring is connected between the slide plate and the fixing frame, a connecting rod is fixedly connected to the slide plate, and a sealing plate is fixedly connected to the connecting rod, and the sealing plate covers the top of the exhaust hole when the slide plate is not pushed.

[0008] As a preferred solution of the present invention, the exhaust holes are distributed at equal intervals on the surface of the housing, and the diameters of the exhaust holes increase from a side close to the slide to a side away from the slide.

[0009] As a preferred solution of the present invention, the support springs and the fixing brackets are symmetrically arranged in two groups, and the lower surface of the slide plate and the upper surface of the feed port are arranged to fit each other.

[0010] As a preferred solution of the present invention, the first screw and the second screw have the same spiral direction, and the first screw and the second screw are parallel to each other.

[0011] As a preferred solution of the present invention, the first connecting plate and the second connecting plate are connected by a limited sliding connection, and the first connecting plate and the second connecting plate are respectively provided with an empty groove part and a sealing plate part, and the empty groove part and the sealing plate part of the first connecting plate and the second connecting plate are complementary and correspondingly arranged.

[0012] As a preferred solution of the present invention, the damping shaft includes a fixed block fixedly mounted on the surface of the electric push rod, a connecting shaft is rotatably mounted inside the fixed block, a rotating block is fixedly provided on the connecting shaft, and a plurality of damping pads are fixedly provided on the radial outer peripheral wall of the connecting shaft.

[0013] As a preferred solution of the present invention, the damping pad is in the shape of a hemisphere, and the diameter of the damping pad is larger than the radial gap distance between the connecting shaft and the fixing block.

[0014] As a preferred solution of the present invention, the central axes of the fixed rod, the second synchronous wheel and the inner rod are collinear, the first docking groove extends radially along the second synchronous wheel, and multiple first docking grooves are evenly distributed on the second synchronous wheel along the circumference of the second synchronous wheel, the second docking grooves are evenly distributed on the inner rod along the circumference of the inner rod, and the second docking grooves and the first docking grooves are evenly distributed along the circumference.

[0015] As a preferred solution of the present invention, one end of the vortex spring is connected to the second synchronous wheel, and the other end of the vortex spring is connected to the inner rod. The connection between the second screw and the second synchronous wheel is a rotational connection. A keyway and a movable groove are provided inside the second screw. When the spline rod moves axially to be located in the keyway, the spline rod and the second screw are key-connected. When the spline rod moves axially to be located in the movable groove, the spline rod and the second screw are relatively freely connected.

[0016] The working principle and beneficial effects of the present invention are:

[0017] 1. By setting the first screw, the second screw and the electric push rod, when the electric push rod is shortened, the docking rod is disengaged from the inside of the first docking groove and the second docking groove. At this time, when the motor drives the first synchronous wheel to rotate, the synchronous belt drives the second synchronous wheel to slide on the outside of the inner rod, so that the second synchronous wheel no longer acts on the second screw, and then the first outer bushing continues to move and the second outer bushing stops moving. At this time, the empty slot part of the first connecting plate is aligned with the empty slot part of the second connecting plate, so that the material falls automatically, realizing the functions of automatic loading and automatic discharging. By changing the shortening time of the second electric push rod, the device can accurately adjust the loading position.

[0018] 2. Through the material port assembly on the device, the exhaust holes at various positions can be gradually opened in the process of the device pushing the slide plate to move, so that the device can first discharge the steam generated during the drying inside the device during the loading process, and because the diameter of the exhaust holes increases from the side close to the slide plate to the side away from the slide plate, the device can slowly discharge the steam during the loading process, ensuring the safety of the device during use, and solving the problem of the existing loading device that the existing loading device cannot automatically and slowly discharge the steam in the device during the loading process.

[0019] 3. Through the provision of the vortex spring and the spline rod, when the electric push rod is shortened, the connection mode between the spline rod and the second screw is changed from a relatively free connection relationship to a key connection. At the same time, the second synchronous wheel and the inner rod are disengaged from the docking state, and the second synchronous wheel no longer directly acts on the second screw. At this time, the second screw can stop rotating until the vortex spring torque gradually increases and drives the second screw to rotate, thereby causing the second outer bushing to continue to move after stopping for a period of time, so that the device can limit the maximum distance between the first connecting plate and the second connecting plate, thereby ensuring the safety of the device during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 This is a schematic diagram of the overall structure of an automatic feeding device for an oven according to the present invention;

[0022] Figure 2 yes Figure 1 A magnified schematic diagram of the structure at center A;

[0023] Figure 3 yes Figure 1 A magnified schematic diagram of the structure at B in the middle;

[0024] Figure 4 yes Figure 1 A magnified schematic diagram of the structure at C in the middle;

[0025] Figure 5 This is a schematic diagram of the split structure of the first connecting plate and the second connecting plate of the present invention;

[0026] Figure 6 This is a schematic diagram of the present invention's docking rod and the second synchronous wheel in a separated state;

[0027] Figure 7 This is a schematic diagram of the docking state of the docking rod and the second synchronous wheel of the present invention;

[0028] Figure 8 This is a schematic diagram of the internal structure of the second synchronous wheel of the present invention;

[0029] Figure 9 yes Figure 8 A magnified schematic diagram of the structure at D in the middle;

[0030] Figure 10 yes Figure 8 Enlarged schematic diagram of the structure at E in the middle.

[0031] 1501, fixed block; 1502, rotating block; 1503, connecting shaft; 1504, damping pad; 16, docking rod; 17, fixed rod; 18, second synchronous wheel; 19, first docking groove; 20, inner rod; 21, second docking groove; 22, vortex spring; 23, keyway; 24, spline rod; 25, movable groove. DETAILED DESCRIPTION

[0032] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0033] Example 1

[0034] like Figures 1-9As shown, this embodiment proposes an automatic feeding device for an oven, including a shell 1, an electric push rod 2 and a motor 3 are respectively installed on both sides of the shell 1, a first synchronous wheel 4 is fixedly connected to the output shaft of the motor 3, a first screw 7 is fixedly installed on the first synchronous wheel 4, the first synchronous wheel 4 is driven to rotate by the motor 3, and the first synchronous wheel 4 drives the first screw 7 to rotate, a damping shaft 15 is installed on the electric push rod 2, a docking rod 16 is fixedly connected to the damping shaft 15, a fixed rod 17 is fixedly connected to the docking rod 16, an inner rod 20 is provided on the outer side of the fixed rod 17, a vortex spring 22 is installed on the outer side of the inner rod 20, and a second synchronous shaft 15 is installed on the outer side of the vortex spring 22. The surfaces of the step wheel 18, the second synchronous wheel 18 and the inner rod 20 are respectively provided with a first docking groove 19 and a second docking groove 21 for docking with the docking rod 16, a synchronous belt 5 is installed between the second synchronous wheel 18 and the first synchronous wheel 4, a spline rod 24 is fixedly connected to the fixed rod 17, a second screw 8 is provided on the outside of the spline rod 24, the first screw 7 and the second screw 8 are both rotatably connected to the outer shell 1, a material port assembly 6 is installed between the first screw 7 and the second screw 8, the second screw 8 and the inner rod 20 are coaxially fixedly connected, a first outer bushing 9 is movably installed on the first screw 7, and a first connecting plate 10 is fixedly connected to the bottom of the first outer bushing 9. When the first screw 7 rotates, it drives the first outer bushing 9 to move, thereby driving the first connecting plate 10 to move. A push plate 13 is fixedly provided on the lower side of the first connecting plate 10. Before loading the material into the oven, the push plate 13 on the first connecting plate 10 can act on the material port assembly 6. The material port assembly 6 is suitable for opening the material port and the air port of the oven. The air port is opened to slowly discharge the steam in the oven, so as to avoid the material on the first connecting plate 10 being blown away due to the excessive air pressure in the oven when loading the material into the oven, thereby ensuring the safety of the device during use. A second outer bushing 11 is movably installed on the second screw 8. A second connecting plate 12 is fixedly connected to the second outer bushing 11. The second connecting plate 12 A material temporary storage bin surrounded by an outer baffle 14 is fixedly connected above. When the docking rod 16 is inserted into the first docking groove 19 and the second docking groove 21 by the electric push rod 2, the first synchronous wheel 4 rotates, and the synchronous belt 5 drives the second synchronous wheel 18 to rotate. Since the second synchronous wheel 18 drives the inner rod 20 to rotate together through the cooperation of the docking rod 16, the first docking groove 19 and the second docking groove 21, the rotation of the inner rod 20 drives the second screw 8 to rotate, and the second screw 8 drives the second outer bushing 11 and the second connecting plate 12 to move. In this state, the empty groove portion on the second connecting plate 12 coincides with the sealing plate portion on the first connecting plate 10, and no material is discharged.After the electric push rod 2 moves to pull the damping shaft 15 and its docking rod 16 and fixed rod 17, causing the docking rod 16 to disengage from the second docking groove 21 on the inner rod 20 and the first docking groove 19 on the second synchronous wheel 18, the second synchronous wheel 18 then drives the vortex spring 22 to rotate to accumulate torque. At this time, the fixed rod 17 and the second screw rod 8 stop rotating until the torque of the vortex spring 22 accumulates to a level sufficient to pull the second screw rod 8 to overcome the friction force of the damping shaft 15 and rotate. The first connecting plate 10 and the second connecting plate 12 move synchronously again, and the empty slot on the second connecting plate 12 coincides with the empty slot on the first connecting plate 10, thereby allowing the material to automatically fall into the oven, achieving a precise feeding function. The vortex spring 22 can then be used to automatically reset the second screw rod 8.

[0035] Example 2

[0036] like Figures 1-10 As shown, based on Example 1, this embodiment also has the following structure: the feed port assembly 6 includes an exhaust hole 606 and a feed port 607 opened above the shell 1, the exhaust hole 606 is connected to the air port of the oven, the feed port 607 is connected to the feed port of the oven, a slide 601 for opening or closing the feed port 607 is provided above the feed port 607, the connection between the slide 601 and the shell 1 is a sliding connection, a support spring 603 is fixedly provided on the slide 601, and a fixing frame 606 is fixedly connected to the shell 1. 02. The support spring 603 is connected between the slide 601 and the fixed frame 602. The slide 601 is fixedly connected with a connecting rod 604. The connecting rod 604 is fixedly connected with a sealing plate 605. When the slide 601 is not pushed, the sealing plate 605 covers the exhaust holes 606. When the slide 601 is pushed, the sealing plate 605 opens the exhaust holes 606 one by one, so that the steam can be automatically discharged before the feed port 607 is opened, avoiding the material being blown away due to a one-time pressure relief, and ensuring the stability during loading.

[0037] In this embodiment, the exhaust holes 606 are evenly spaced on the surface of the housing 1, and the diameter of the exhaust holes 606 increases from the side close to the slide 601 to the side away from the slide 601, so that the device can slowly discharge steam, thereby ensuring the safety of the device when in use.

[0038] In this embodiment, two groups of support springs 603 and fixing frames 602 are symmetrically arranged, and the lower surface of the slide plate 601 and the upper surface of the feed port 607 are arranged to fit each other. The push plate 13 can push the slide plate 601 during the sliding process, so that the slide plate 601 can slide smoothly on the shell 1, and the slide plate 601 can be reset subsequently by the support spring 603.

[0039] In this embodiment, the spiral direction of the first screw 7 and the second screw 8 are the same, the first screw 7 and the second screw 8 are parallel to each other, and the first screw 7 and the second screw 8 can maintain synchronization when rotating to ensure the stability of the device during operation.

[0040] In this embodiment, the first connecting plate 10 and the second connecting plate 12 are connected by a limited sliding connection, and the first connecting plate 10 and the second connecting plate 12 are respectively provided with an empty slot portion and a sealing plate portion. The empty slot portion and the sealing plate portion of the first connecting plate 10 and the second connecting plate 12 are complementary and correspondingly arranged. When the first connecting plate 10 and the second connecting plate 12 move synchronously, the empty slot portion of the first connecting plate 10 corresponds to the sealing plate portion of the second connecting plate 12. When the second connecting plate 12 stops moving, the empty slot portion of the second connecting plate 12 and the empty slot portion of the first connecting plate 10 are aligned with each other, thereby realizing the feeding function after loading.

[0041] In this embodiment, the damping shaft 15 includes a fixed block 1501 fixedly mounted on the surface of the electric push rod 2, and a connecting shaft 1503 is rotatably mounted inside the fixed block 1501. A rotating block 1502 is fixedly arranged on the connecting shaft 1503, and a plurality of damping pads 1504 are fixedly arranged on the radial outer peripheral wall of the connecting shaft 1503. The damping pads 1504 can resist the inside of the fixed block 1501, so that the connecting shaft 1503 and the rotating block 1502 need to overcome greater resistance when rotating. The resistance to the rotation of the connecting shaft 1503 inside the fixed block 1501 can be provided by pressing the damping pads 1504 installed in the fixed block 1501.

[0042] In this embodiment, the damping pad 1504 is shaped like a hemisphere, and the diameter of the damping pad 1504 is larger than the radial gap distance between the connecting shaft 1503 and the fixed block 1501, ensuring that the damping pad 1504 remains in a compressed state between the connecting shaft 1503 and the fixed block 1501, so that the connecting shaft 1503 remains stationary when not subjected to torque.

[0043] In this embodiment, the central axes of the fixed rod 17, the second synchronous wheel 18 and the inner rod 20 are collinear, the first docking groove 19 extends radially along the second synchronous wheel 18, and multiple first docking grooves 19 are evenly distributed on the second synchronous wheel 18 along the circumference of the second synchronous wheel 18, and the second docking grooves 21 are evenly distributed on the inner rod 20 along the circumference of the inner rod 20. The second docking grooves 21 and the first docking grooves 19 are evenly distributed along the circumference, which makes the device more convenient when docking.

[0044] When the second synchronous wheel 18 and the inner rod 20 are out of docking state and the spline rod 24 is key-connected with the second screw 8, the second synchronous wheel 18 rotates and drives the vortex spring 22 to accumulate torque, and the vortex spring 22 drives the inner rod 20 and the second screw 8 to automatically reset, thereby realizing the automatic reset function.

[0045] Specifically, first, Figure 1-Figure 7 As shown, in the initial state, the electric push rod 2 causes the docking rod 16 to be stuck in the first docking groove 19 and the second docking groove 21, and the material to be dried is placed in the material temporary storage bin. At this time, the first synchronous wheel 4 and the first screw 7 are driven to rotate by the motor 3. When the first synchronous wheel 4 and the first screw 7 rotate, they can drive the first outer bushing 9 to move, and when the first synchronous wheel 4 rotates, it will drive the second synchronous wheel 18 to rotate through the synchronous belt 5. At this time, because the second synchronous wheel 18 drives the inner rod 20 to rotate together through the cooperation of the docking rod 16, the first docking groove 19 and the second docking groove 21, the inner rod 20 drives the second screw 8 to rotate when it rotates. When the first screw 7 and the second screw 8 rotate synchronously, the first outer bushing 9 and the second outer bushing 11 move synchronously, so that The empty groove parts and the sealing plate parts of the first connecting plate 10 and the second connecting plate 12 complement each other, so that the material will not fall. During the continuous movement of the first connecting plate 10, the push plate 13 will push the slide plate 601, and the support spring 603 on the slide plate 601 and the fixing frame 602 will be compressed. In the process of the movement of the slide plate 601, the sealing plate 605 will be driven to move through the connecting rod 604, so that as the slide plate 601 moves, the sealing plate 605 can gradually open the exhaust holes 606 of different sizes. First, the exhaust hole 606 of the smallest size is opened, until the exhaust hole 606 of the largest size is opened, and finally the feed port 607 under the slide plate 601 is opened, realizing the function of slowly exhausting steam before feeding into the oven.

[0046] like Figure 1-Figure 3 and Figures 8-10As shown, the electric push rod 2 moves to pull the damping shaft 15 and the docking rod 16 and the fixed rod 17 thereon, so that the docking rod 16 is disengaged from the second docking groove 21 on the inner rod 20 and the first docking groove 19 on the second synchronous wheel 18, and the spline rod 24 on the fixed rod 17 is stuck in the key groove 23. Under the action of the damping shaft 15, the second synchronous wheel 18 cannot pull the inner rod 20 through the vortex spring 22, thereby causing the second screw 8 to be temporarily stagnant when the first screw 7 rotates (because the fixed block The damping pad 1504 between 1501 and the connecting shaft 1503 makes the rotating block 1502 have a large resistance when rotating. At this time, the second synchronous wheel 18 needs to rotate the vortex spring 22 more circles to drive the inner rod 20 to rotate. Therefore, the second screw 8 will stop rotating temporarily until the torque of the vortex spring 22 is sufficient to overcome the resistance between the fixed block 1501 and the connecting shaft 1503, and the second screw 8 will rotate again). When the second screw 8 rotates again, the first connecting plate 10 and the second connecting plate 12 are rotated. When the first connecting plate 10 and the second connecting plate 12 overlap, the electric push rod 2 moves, so that the docking rod 16 is stuck in the first docking groove 19 and the second docking groove 21, so that when the synchronous belt 5 rotates, the first screw 7 and the second screw 8 rotate synchronously, and the feed port 607 is also closed by the slide plate 601, and the exhaust hole is also closed by the sealing plate 605. The oven can perform drying work. After the material is dried, the material is discharged by opening the door panel on the front side of the shell 1 (such as Figure 1 As shown), the first connecting plate 10 and the second connecting plate 12 move synchronously to Figure 1 The reset process is completed.

[0047] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An automatic feeding device for an oven, comprising a housing (1), characterized in that: An electric push rod (2) and a motor (3) are respectively installed on both sides of the housing (1); the output shaft of the motor (3) is fixedly connected to a first synchronous wheel (4); a first screw (7) is fixedly installed on the first synchronous wheel (4); a damping shaft (15) is installed on the electric push rod (2); a docking rod (16) is fixedly connected to the damping shaft (15); a fixing rod (17) is fixedly connected to the docking rod (16); an inner screw (17) is attached to the outer side of the fixing rod (17). Rod (20), a vortex spring (22) is installed on the outside of the inner rod (20), a second synchronous wheel (18) is installed on the outside of the vortex spring (22), the second synchronous wheel (18) and the surface of the inner rod (20) are respectively provided with a first docking groove (19) and a second docking groove (21) for docking with the docking rod (16), a synchronous belt (5) is installed between the second synchronous wheel (18) and the first synchronous wheel (4), and a fixed connection is provided on the fixed rod (17). A spline rod (24) is connected, and a second screw rod (8) is provided on the outside of the spline rod (24). The first screw rod (7) and the second screw rod (8) are both rotatably connected to the housing (1). A material port assembly (6) suitable for opening or closing the material port of the oven is installed between the first screw rod (7) and the second screw rod (8). The second screw rod (8) and the inner rod (20) are coaxially fixedly connected. A first outer bushing (9) is movably installed on the first screw rod (7). A first connecting plate (10) is fixedly connected to the bottom of the first outer bushing (9), and a push plate (13) suitable for acting on the material port assembly to open or close the material port of the oven is fixedly provided on the lower side of the first connecting plate (10). A second outer bushing (11) is movably mounted on the second screw (8), and a second connecting plate (12) is fixedly connected to the second outer bushing (11), and a material temporary storage bin surrounded by an outer baffle (14) is fixedly connected to the top of the second connecting plate (12).

2. The automatic feeding device for an oven according to claim 1, characterized in that: The material port assembly (6) includes an exhaust hole (606) and a feed port (607) opened above the shell (1), the exhaust hole (606) is connected to the air port of the oven, and the feed port (607) is connected to the material port of the oven. A slide plate (601) for opening or closing the feed port (607) is provided above the feed port (607), and the connection between the slide plate (601) and the shell (1) is a sliding connection. A fixed plate is provided on the slide plate (601). A support spring (603) is provided, a fixing frame (602) is fixedly connected to the housing (1), the support spring (603) is connected between the slide plate (601) and the fixing frame (602), a connecting rod (604) is fixedly connected to the slide plate (601), a sealing plate (605) is fixedly connected to the connecting rod (604), and when the slide plate (601) is not pushed, the sealing plate (605) covers the top of the exhaust hole (606).

3. The automatic feeding device for an oven according to claim 2, characterized in that: The exhaust holes (606) are distributed at equal intervals on the surface of the housing (1), and the diameters of the exhaust holes (606) increase gradually from a side close to the slide plate (601) to a side away from the slide plate (601).

4. The automatic feeding device for an oven according to claim 2, characterized in that: The support springs (603) and the fixing brackets (602) are symmetrically arranged in two groups, and the lower surface of the slide plate (601) and the upper surface of the feed port (607) are arranged to fit each other.

5. The automatic feeding device for an oven according to claim 1, characterized in that: The spiral directions of the first screw (7) and the second screw (8) are the same, and the first screw (7) and the second screw (8) are parallel to each other.

6. The automatic feeding device for an oven according to claim 1, characterized in that: The first connecting plate (10) and the second connecting plate (12) are connected in a limited sliding manner. The first connecting plate (10) and the second connecting plate (12) are respectively provided with a slot portion and a sealing plate portion. The slot portion and the sealing plate portion of the first connecting plate (10) and the second connecting plate (12) are complementary and correspondingly arranged.

7. The automatic feeding device for an oven according to claim 1, characterized in that: The damping shaft (15) includes a fixed block (1501) fixedly mounted on the surface of the electric push rod (2), a connecting shaft (1503) rotatably mounted inside the fixed block (1501), a rotating block (1502) fixedly mounted on the connecting shaft (1503), and a plurality of damping pads (1504) fixedly mounted on the radial outer peripheral wall of the connecting shaft (1503).

8. The automatic feeding device for an oven according to claim 7, characterized in that: The damping pad (1504) is in the shape of a hemisphere, and the diameter of the damping pad (1504) is larger than the radial gap distance between the connecting shaft (1503) and the fixing block (1501).

9. The automatic feeding device for an oven according to claim 1, characterized in that: The central axes of the fixed rod (17), the second synchronous wheel (18) and the inner rod (20) are collinear, the first docking groove (19) extends radially along the second synchronous wheel (18), and a plurality of the first docking grooves (19) are evenly distributed on the second synchronous wheel (18) along the circumference of the second synchronous wheel (18), the second docking grooves (21) are evenly distributed on the inner rod (20) along the circumference of the inner rod (20), and the second docking grooves (21) and the first docking grooves (19) are evenly distributed along the circumference.

10. The automatic feeding device for an oven according to claim 1, characterized in that: One end of the vortex spring (22) is connected to the second synchronous wheel (18), and the other end of the vortex spring (22) is connected to the inner rod (20). The connection between the second screw rod (8) and the second synchronous wheel (18) is a rotational connection. A key groove (23) and a movable groove (25) are provided inside the second screw rod (8). When the spline rod (24) moves axially to be located in the key groove (23), the spline rod (24) and the second screw rod (8) are in a key connection; when the spline rod (24) moves axially to be located in the movable groove (25), the spline rod (24) and the second screw rod (8) are in a relatively free connection relationship.

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