Feeding device and welding equipment

By designing a loading device for laser automatic welding of plastic products, the clamping components and support components are used to realize loading one by one, solving the problems of low loading automation and production efficiency in the prior art, and reducing production costs.

CN222697968UActive Publication Date: 2025-04-01HANS LASER TECH IND GRP CO LTD
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Patent Information

Application Number
CN202421246531.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-31
Publication Date
2025-04-01
Estimated Expiration
2034-05-31

AI Technical Summary

Technical Problem

In the prior art, the degree of automation and production efficiency of laser welding of plastic products is low, and the production cost is high.

Method used

A feeding device is designed, including a material rack, a support assembly and a clamping assembly. By contacting several materials above the bottom material in the silo, it prevents falling. The supporting assembly supports the bottom material in the silo to achieve feeding one by one.

Benefits of technology

It improves the degree of automation and production efficiency of loading, and reduces labor costs and production costs.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model belongs to the technical field of laser machining, and particularly relates to a feeding device and welding equipment, the feeding device comprises a material frame, the material frame comprises a platform, a material bin, a bearing assembly and a clamping assembly, the material bin is arranged on the platform and used for stacking materials, and the bearing assembly and the clamping assembly are both arranged on the platform and used for clamping the materials; the bearing assembly is used for bearing the lowermost material in the stock bin, the clamping assembly is used for abutting against a plurality of materials above the lowermost material in the stock bin so as to prevent the materials above the lowermost material in the stock bin from falling, and the welding equipment comprises the feeding device. The automation degree and the production efficiency are improved, and the labor cost and the production cost are reduced.
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Description

Technical Field

[0001] The present application belongs to the field of laser processing technology, and more specifically, relates to a feeding device and welding equipment. Background Art

[0002] In the automatic laser welding of plastic products, the plastic base and the upper cover of the product need to be welded together. In the prior art, the materials to be welded are generally placed one by one on the tray of the belt transmission mechanism manually, and the belt transmission mechanism transports the tray loaded with materials to the side of the material-picking robot. The robot picks up the materials, and then the welding device performs welding. This loading method has a low degree of automation and production efficiency, and a high production cost. Utility Model Content

[0003] The embodiments of the present application provide a feeding device and welding equipment, in which the supporting components and clamping components on the material rack cooperate with each other to control the number of materials fed, thereby improving the degree of automation and production efficiency and reducing labor costs and production costs.

[0004] The technical solution adopted in the embodiment of the present application is: to provide a feeding device, comprising:

[0005] The material rack comprises a platform, a silo, a supporting assembly and a clamping assembly, wherein the silo is arranged on the platform and is used for stacking materials, the supporting assembly and the clamping assembly are both arranged on the platform, the supporting assembly is used for supporting the material at the bottom of the silo, and the clamping assembly is used for contacting with several materials above the material at the bottom of the silo to prevent the material above the material at the bottom of the silo from falling.

[0006] Optionally, the clamping assembly includes an abutment member and a side-push driving member, the side-push driving member is arranged on the platform, the side-push driving member is transmission-connected to the abutment member, the abutment member is used to abut against the side walls of several materials above the bottom material in the silo, the side wall of the silo is provided with a first through hole for passing the clamping assembly, the first through hole is opposite to the inner side wall of the silo, the side-push driving member pushes the abutment member to move in a direction close to the material, so that the abutment member passes through the first through hole and abuts against the side walls of several materials above the bottom material in the silo, and the several materials above the bottom material in the silo are clamped between the abutment member and the inner side wall of the silo.

[0007] Optionally, the supporting assembly includes a supporting member and a supporting driving member, the supporting driving member is arranged on the platform, the supporting driving member is transmission-connected to the supporting member, the side wall of the silo is provided with a second through hole for passing the supporting assembly, the supporting driving member drives the supporting member to move toward the direction close to the lowest material in the silo, so that the supporting member passes through the second through hole and is located below the lowest material in the silo to support the lowest material in the silo.

[0008] Optionally, the feeding device further includes a material picking mechanism, and a material dropping port connected to the material bin is provided on the platform, and the material picking mechanism is provided under the material rack to pick up the material dropped from the material dropping port and transport the material to the next workstation.

[0009] Optionally, the material picking mechanism includes a translation component, a lifting component and a material picking component, the material picking component is used to pick up materials, the lifting component is transmission connected to the material picking component to drive the material picking component to move toward or away from the platform, and the translation component is transmission connected to the lifting component to drive the lifting component and the material picking component to move in a horizontal direction below the platform.

[0010] Optionally, the material picking assembly includes a material picking rack and an adsorption component, the material picking rack is transmission connected to the translation assembly, a limiting groove is provided on the material picking rack, the limiting groove is used to accommodate materials, the adsorption component is used to absorb materials, a third through hole is opened in the limiting groove, the adsorption component is arranged in the limiting groove, the lifting assembly is penetrated through the third through hole and is transmission connected to the adsorption component to drive the adsorption component to move toward or away from the platform.

[0011] Optionally, the limiting groove includes a first limiting portion and a second limiting portion, the first limiting portion and the second limiting portion are respectively used to accommodate materials of different sizes, the second limiting portion is arranged in the first limiting portion, the third through hole is opened in the second limiting portion, and the adsorption member is arranged in the second limiting portion.

[0012] Optionally, the lifting assembly includes a first lifting drive member and a second lifting drive member, and the first lifting drive member and the second lifting drive member are both transmission connected to the translation assembly, and the first lifting drive member and the second lifting drive member are relatively arranged below the adsorption member to jointly drive the adsorption member to move toward or away from the platform.

[0013] Optionally, an in-place detection member is provided on the adsorption member.

[0014] Optionally, a quantity detection component is provided on the material rack to detect the quantity of materials in the silo.

[0015] An embodiment of the present application also provides a welding device, including the feeding device described above.

[0016] The beneficial effects of the feeding device and welding equipment provided by the embodiments of the present application are as follows: the feeding device of the embodiments of the present application abuts against several materials above the lowest material in the silo through the clamping component to prevent the materials above the lowest material in the silo from falling, and the materials at the lowest material in the silo supported by the supporting component can be transported to the next workstation separately, and the materials above the lowest material in the silo do not move with the movement of the lowest material, thereby realizing one by one feeding, and then, the supporting component is reset, and the clamping component releases several materials above the lowest material in the silo, so that the materials above the lowest material in the silo fall, and the second to last material in the silo falls onto the supporting component to become the lowest material in the silo, and such cyclic feeding can replace manual one-by-one feeding, thereby improving the degree of automation and production efficiency of feeding, and reducing labor costs and production costs;

[0017] Since the welding equipment of the embodiment of the present application includes the loading device in any of the above embodiments, it has the beneficial effects brought by the loading device in any of the above embodiments, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 A schematic diagram of the three-dimensional structure of a feeding device provided in an embodiment of the present application;

[0020] Figure 2 A top view of a feeding device provided in an embodiment of the present application;

[0021] Figure 3 For along Figure 2 The cross-sectional structure diagram along the AA line;

[0022] Figure 4 This is a schematic diagram of the three-dimensional structure of the material taking assembly used in the embodiment of the present application.

[0023] Among them, the reference numerals in the figure are:

[0024] 1. Material rack; 11. Platform; 12. Material bin; 13. Supporting assembly; 14. Clamping assembly; 15. Quantity detection member; 111. Material drop opening; 131. Supporting member; 132. Supporting driving member; 141. Abutting member; 142. Side push driving member;

[0025] 2. Material picking mechanism; 21. Translation assembly; 22. Lifting assembly; 23. Material picking assembly; 221. First lifting drive member; 222. Second lifting drive member; 231. Material picking rack; 232. Adsorption member; 2311. Limiting groove; 2321. In-place detection member; 23111. First limiting portion; 23112. Second limiting portion. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0027] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0028] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0030] See also Figure 1 , Figure 2 and Figure 3, the feeding device provided in the embodiment of the present application is now described. The feeding device provided in the embodiment of the present application includes a material rack 1. Among them, the material rack 1 includes a platform 11, a silo 12, a supporting assembly 13 and a clamping assembly 14, the silo 12 is arranged on the platform 11, the silo 12 is used to stack materials, the supporting assembly 13 and the clamping assembly 14 are both arranged on the platform 11, the supporting assembly 13 is used to support the material at the bottom of the silo 12, and the clamping assembly 14 is used to abut against several materials above the bottom material in the silo 12 to prevent the material above the bottom material in the silo 12 from falling.

[0031] The material in the embodiment of the present application may be a plastic base or an upper cover plate to be welded.

[0032] The silo 12 in the embodiment of the present application can be surrounded by a number of limiting columns or enclosures, and the materials are stacked in the silo 12. A plurality of silos 12 of different sizes can be arranged on the platform 11 to accommodate materials of different types, thereby improving the compatibility of the feeding device.

[0033] The clamping assembly 14 may include a clamping drive and two oppositely disposed clamping plates. The clamping drive drives the clamping plates to move closer to or farther away from each other to clamp the material. The clamping assembly 14 may only clamp the second-to-last material in the silo 12 to prevent the material above the lowest material in the silo 12 from moving downward. The clamping assembly 14 may clamp one or more materials, and the clamping assembly 14 may be disposed in the silo 12.

[0034] The supporting assembly 13 may include a rotating driving member and a supporting block. The rotating driving member is drivingly connected to the supporting block to drive the supporting block to be located below the material or away from the material. The supporting assembly 13 may be disposed in the silo 12 .

[0035] The clamping assembly 14 of the embodiment of the present application abuts against several materials above the lowest material in the silo 12 to prevent the materials above the lowest material in the silo 12 from falling. The materials at the bottom of the silo 12 supported by the supporting assembly 13 can be transported to the next workstation separately, and the materials above the lowest material in the silo 12 do not move with the movement of the lowest material, thereby realizing one by one material removal. Then, the supporting assembly 13 is reset, and the clamping assembly 14 releases several materials above the lowest material in the silo 12, causing the materials above the lowest material in the silo 12 to fall. The second to last material in the silo 12 falls onto the supporting assembly 13 and becomes the lowest material in the silo 12. Such cyclic loading can replace manual loading one by one, thereby improving the automation degree and production efficiency of loading, and reducing labor costs and production costs.

[0036] Preferably, see Figure 3The clamping assembly 14 includes an abutment 141 and a side push driving member 142, wherein the side push driving member 142 is arranged on the platform 11, and the side push driving member 142 is transmission-connected with the abutment 141, and the abutment 141 is used to abut against the side walls of several materials above the lowest material in the silo 12, and the side wall of the silo 12 is provided with a first through hole for passing the clamping assembly 14, and the first through hole is opposite to the inner side wall of the silo 12, and the side push driving member 142 pushes the abutment 141 to move toward the material, so that the abutment 141 passes through the first through hole and abuts against the side walls of several materials above the lowest material in the silo 12, and the several materials above the lowest material in the silo 12 are clamped between the abutment 141 and the inner side wall of the silo 12.

[0037] The side push drive member 142 can be a cylinder, an electric cylinder or a linear motor. Taking the cylinder as an example, the drive shaft of the cylinder is connected to the abutment member 141. The cylinder drives the abutment member 141 through the first through hole through the drive shaft, and abuts against the side walls of several materials above the bottom material in the silo 12, so that several materials above the bottom material in the silo 12 are clamped between the abutment member 141 and the inner wall of the silo 12.

[0038] The abutment member 141 may be an abutment plate made of silicone material, which can increase the friction with the material side wall to prevent the material from moving downward. The side push drive member 142 is arranged outside the silo 12, which is more convenient to install than being arranged inside the silo 12.

[0039] The material is prevented from moving downward by clamping. Compared with the supporting assembly 13 that is separately provided to support the second-to-last material in the silo 12, the clamping assembly 14 does not need to enter between the second-to-last material and the lowest material in the silo 12, so as to prevent the upper and lower surfaces of the material from being squeezed and causing damage to the material.

[0040] Preferably, the supporting assembly 13 includes a supporting member 131 and a supporting driving member 132, the supporting driving member 132 is arranged on the platform 11, the supporting driving member 132 is transmission-connected to the supporting member 131, the side wall of the silo 12 is provided with a second through hole for passing the supporting assembly 13, the supporting driving member 132 drives the supporting member 131 to move toward the direction of the material at the bottom of the silo 12, so that the supporting member 131 passes through the second through hole and is located below the material at the bottom of the silo 12 to support the material at the bottom of the silo 12.

[0041] The supporting member 131 may be a supporting plate, and the supporting driving member 132 may be a cylinder, an electric cylinder or a linear motor. Taking the cylinder as an example, the driving shaft of the cylinder is connected to the supporting member 131, and the cylinder drives the supporting member 131 to move toward the material through the driving shaft. After passing through the second through hole, the supporting member 131 is located below the lowest material in the silo 12 to support the lowest material in the silo 12. The cylinder drives the supporting member 131 to move away from the material through the driving shaft, so that the supporting member 131 exits the silo 12 from the second through hole to release the lowest material in the silo 12.

[0042] The supporting assembly 13 can be disposed on two sides of the silo 12 opposite to the clamping assembly 14, with the first through hole being opposite to the second through hole.

[0043] The loading device further includes a material taking mechanism 2. The platform 11 is provided with a material drop opening 111 connected to the silo 12. The material taking mechanism 2 is provided below the material rack 1 to take the material dropped from the material drop opening 111 and transport the material to the next station. The material taking mechanism 2 may be a belt transmission device provided below the material rack 1. The material at the bottom of the silo 12 drops onto the belt transmission device through the material drop opening 111, and the belt transmission device transports the material to the next station.

[0044] Preferably, see Figure 1 and Figure 4 The material picking mechanism 2 includes a translation component 21, a lifting component 22 and a material picking component 23. The material picking component 23 is used to pick up materials. The lifting component 22 is connected to the material picking component 23 to drive the material picking component 23 to move toward or away from the platform 11. The translation component 21 is connected to the lifting component 22 to drive the lifting component 22 and the material picking component 23 to move horizontally below the platform 11.

[0045] The translation assembly 21 can be a mobile platform driven by a rotary motor, including a rotary motor, a screw, a slider, and a slide rail to move the platform. The rotary motor is connected to the screw to drive the screw to rotate, the slider is threadedly connected to the screw, the slider is slidably connected to the slide rail, the mobile platform is connected to the slider, the length direction of the screw is parallel to the length direction of the slide rail, and the rotary motor rotates the screw to drive the mobile platform on the slider to move along the length direction of the slide rail. The lifting assembly 22 can adopt the same structure as the translation assembly 21. The lifting assembly 22 is installed on the mobile platform on the translation assembly 21, and the material collection assembly 23 can be installed on the mobile platform of the lifting assembly 22.

[0046] The translation assembly 21 moves the lifting assembly 22 and the material taking assembly 23 to below the material drop opening 111 of the platform 11 , and the lifting assembly 22 drives the material taking assembly 23 to approach the material drop opening 111 to take the material.

[0047] The material taking component 23 can be a clamp or a suction cup for taking materials.

[0048] Preferably, the material picking component 23 includes a material picking rack 2311 and an adsorption component 232, the material picking rack 2311 is transmission connected to the translation component 21, a limiting slot 2311 is provided on the material picking rack 2311, the limiting slot 2311 is used to accommodate materials, the adsorption component 232 is used to absorb materials, a third through hole is opened in the limiting slot 2311, the adsorption component 232 is arranged in the limiting slot 2311, the lifting component 22 is penetrated through the third through hole and is transmission connected to the adsorption component 232 to drive the adsorption component 232 to move toward or away from the platform 11.

[0049] The material collecting rack 2311 does not move with the movement of the lifting assembly 22. After the lifting assembly 22 drives the adsorbing member 232 to approach the material drop opening 111 to adsorb the material, the supporting assembly 13 releases the material, and the lifting assembly 22 drives the adsorbing member 232 away from the material drop opening 111 to place the material in the limiting groove 2311 of the material collecting rack 2311. The limiting groove 2311 can prevent the material from shifting on the material collecting rack 2311 when the material is transported to the next station.

[0050] The adsorption member 232 is an adsorption plate provided with a plurality of suction cups or suction holes, and the suction cups or suction holes are connected to an external vacuum device.

[0051] Preferably, the limiting groove 2311 includes a first limiting portion 23111 and a second limiting portion 23112, the first limiting portion 23111 and the second limiting portion 23112 are respectively used to accommodate materials of different sizes, the second limiting portion 23112 is arranged in the first limiting portion 23111, the third through hole is opened in the second limiting portion 23112, and the adsorption member 232 is arranged in the second limiting portion 23112.

[0052] At least two limiting parts can be arranged in the limiting groove 2311 to accommodate materials of different sizes. The size of the first limiting part 23111 is larger than that of the second limiting part 23112. The first limiting part 23111 can accommodate materials of larger size, and the second limiting part 23112 can accommodate materials of smaller size. The first limiting part 23111 and the second limiting part 23112 are both grooves sunken in the material taking frame 2311.

[0053] The lifting assembly 22 includes a first lifting drive member 221 and a second lifting drive member 222. The first lifting drive member 221 and the second lifting drive member 222 are both transmission-connected to the translation assembly 21. The first lifting drive member 221 and the second lifting drive member 222 are relatively arranged below the adsorption member 232 to jointly drive the adsorption member 232 to move toward or away from the platform 11.

[0054] The two lifting driving members drive the adsorption member 232 to move in the vertical direction to improve the stability of the adsorption member 232 during movement. The first lifting driving member 221 can be a cylinder, a hydraulic cylinder or a linear motor, and the second lifting driving member 222 can have the same structure as the first lifting driving member 221.

[0055] The adsorption member 232 is provided with a position detection member 2321. The position detection member 2321 can be a contact sensor or an infrared sensor to detect whether the adsorption member 232 has adsorbed the material.

[0056] The rack 1 is provided with a quantity detection member 15 to detect the quantity of materials in the silo 12. The quantity detection member 15 may be an infrared sensor, which can remind the staff to refill materials when the quantity of materials in the silo 12 is insufficient, so as to prevent the lack of materials from affecting the work efficiency.

[0057] The working principle / process of the feeding device provided in the embodiment of the present application is as follows:

[0058] The clamping assembly 14 abuts against several materials above the lowest material in the silo 12, the supporting assembly 13 supports the lowest material in the silo 12, the translation assembly 21 moves the lifting assembly 22 and the material taking assembly 23 to below the drop opening 111 of the platform 11, the lifting assembly 22 drives the adsorption component 232 of the material taking assembly 23 to approach the drop opening 111 to adsorb the lowest material in the silo 12, the supporting driving component 132 drives the supporting component 131 to move away from the material, so that the supporting component 131 exits the silo 12 from the second through hole to release the lowest material in the silo 12, the lifting assembly 22 drives the adsorption component 232 away from the drop opening 111 to place the material in the limiting groove 2311 of the material taking frame 2311, and the translation assembly 21 transports the material to the next station;

[0059] Then, the supporting driving member 132 drives the supporting member 131 to move towards the material, and the supporting member 131 passes through the second through hole. The clamping assembly 14 releases several materials above the material at the bottom of the silo 12, causing the material above the material at the bottom of the silo 12 to fall down, and the second to last material in the silo 12 falls onto the supporting member 131 to become the material at the bottom of the silo 12, and the material taking mechanism 2 can carry out the next round of material taking.

[0060] An embodiment of the present application also provides a welding device, including the feeding device described above.

[0061] Since the welding equipment of the embodiment of the present application includes the loading device in any of the above embodiments, it has the beneficial effects brought by the loading device in any of the above embodiments, which will not be described in detail here.

[0062] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A feeding device, characterized in that: include: The material rack comprises a platform, a silo, a supporting assembly and a clamping assembly, wherein the silo is arranged on the platform and is used for stacking materials, the supporting assembly and the clamping assembly are both arranged on the platform, the supporting assembly is used for supporting the material at the bottom of the silo, and the clamping assembly is used for contacting with several materials above the material at the bottom of the silo to prevent the material above the material at the bottom of the silo from falling.

2. The feeding device according to claim 1, characterized in that: The clamping assembly includes an abutment member and a side-push driving member, the side-push driving member is arranged on the platform, the side-push driving member is transmission-connected with the abutment member, the abutment member is used to abut against the side walls of several materials above the lowest material in the silo, the side wall of the silo is provided with a first through hole for passing the clamping assembly, the first through hole is opposite to the inner side wall of the silo, the side-push driving member pushes the abutment member to move in the direction approaching the material, so that the abutment member passes through the first through hole and abuts against the side walls of several materials above the lowest material in the silo, and the several materials above the lowest material in the silo are clamped between the abutment member and the inner side wall of the silo.

3. The feeding device according to claim 1, characterized in that: The supporting assembly includes a supporting member and a supporting driving member, the supporting driving member is arranged on the platform, the supporting driving member is transmission-connected with the supporting member, the side wall of the silo is provided with a second through hole for passing the supporting assembly, the supporting driving member drives the supporting member to move toward the direction close to the lowest material in the silo, so that the supporting member passes through the second through hole and is located below the lowest material in the silo to support the lowest material in the silo.

4. The feeding device according to any one of claims 1 to 3, characterized in that: It also includes a material taking mechanism. The platform is provided with a material dropping port connected to the material bin. The material taking mechanism is arranged under the material rack to obtain the material dropped from the material dropping port and transport the material to the next workstation.

5. The feeding device according to claim 4, characterized in that: The material picking mechanism includes a translation component, a lifting component and a material picking component. The material picking component is used to pick up materials. The lifting component is transmission-connected with the material picking component to drive the material picking component to move toward or away from the platform. The translation component is transmission-connected with the lifting component to drive the lifting component and the material picking component to move horizontally under the platform.

6. The feeding device according to claim 5, characterized in that: The material picking assembly includes a material picking rack and an adsorption component, the material picking rack is transmission connected to the translation assembly, a limiting groove is provided on the material picking rack, the limiting groove is used to accommodate materials, the adsorption component is used to absorb materials, a third through hole is opened in the limiting groove, the adsorption component is arranged in the limiting groove, the lifting assembly is penetrated through the third through hole and is transmission connected to the adsorption component to drive the adsorption component to move toward or away from the platform.

7. The feeding device according to claim 6, characterized in that: The limiting groove includes a first limiting portion and a second limiting portion, the first limiting portion and the second limiting portion are respectively used to accommodate materials of different sizes, the second limiting portion is arranged in the first limiting portion, the third through hole is opened in the second limiting portion, and the adsorption member is arranged in the second limiting portion.

8. The feeding device according to claim 6, characterized in that: The lifting assembly includes a first lifting drive member and a second lifting drive member, both of which are transmission-connected to the translation assembly, and the first lifting drive member and the second lifting drive member are relatively arranged below the adsorption member to jointly drive the adsorption member to move toward or away from the platform.

9. The feeding device according to claim 6, characterized in that: The adsorption member is provided with an in-place detection member.

10. The feeding device according to claim 1, characterized in that: The material rack is provided with a quantity detection member to detect the quantity of materials in the silo.

11. A welding device, characterized in that: It comprises the feeding device described in any one of claims 1 to 10.