Refrigerator door liner trimming device

Abstract

The utility model relates to an edge cutting device for a refrigerator door liner. The edge cutting device comprises an upper frame, a lower frame and connecting rods. The positioning mechanism comprises a positioning frame and a positioning assembly, and the positioning frame can move up and down along the connecting rod so as to position the target door liner; the punching mechanism comprises a punching frame and a punching assembly, and the punching frame can move up and down to punch a target door liner; the driving mechanism comprises a first driving assembly and a second driving assembly, and the first driving assembly can drive the positioning mechanism to move up and down and can drive the punching mechanism to move up and down; the conveying track is arranged between the positioning mechanism and the punching mechanism in a penetrating mode in the first direction, the target door liner can move along the conveying track so as to have a first position located between the positioning mechanism and the punching mechanism and a second position except the first position, and when the target door liner is located at the first position, the positioning mechanism moves towards the target door liner for positioning; the punching mechanism moves towards the target door shield for punching, it is guaranteed that the door liner cannot deform during edge cutting, the edge cutting quality is improved, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to plate edge cutting technical field, concretely relates to a refrigerator door liner edge cutting device. BACKGROUND

[0002] In the production process of refrigerator door liner, the edge of door liner usually needs to be edge cut to ensure its size accuracy and appearance quality. In the prior art, the edge cutting operation of refrigerator door liner mostly depends on manual operation, which is not only low in efficiency, but also causes inconsistent edge cutting quality due to inconsistent manual operation, thereby affecting product quality.

[0003] Therefore, it is necessary to improve the prior art to overcome the defects in the prior art. SUMMARY

[0004] Therefore, the refrigerator door liner edge cutting device provided by the embodiments of the present application solves at least one problem in the background art.

[0005] The frame comprises an upper frame, a lower frame and a connecting rod for connecting the upper frame and the lower frame;

[0006] The positioning mechanism is located between the upper frame and the lower frame and comprises a positioning frame and a positioning assembly arranged on the positioning frame. The positioning frame can move up and down along the connecting rod under the action of an external force to drive the positioning assembly to move up and down to position the target door liner.

[0007] The punching mechanism is located between the positioning mechanism and the upper frame and comprises a punching frame and a punching assembly arranged on the punching frame. The punching frame can move up and down along the connecting rod under the action of an external force to drive the punching assembly to move up and down to punch the target door liner.

[0008] The driving mechanism comprises a first driving assembly arranged on the positioning frame and a second driving assembly arranged on the upper frame. The first driving assembly can drive the positioning mechanism to move up and down, and the second driving assembly can drive the punching mechanism to move up and down.

[0009] The conveying track is arranged between the positioning mechanism and the punching mechanism along a first direction. The target door liner can move along the conveying track to have a first position between the positioning mechanism and the punching mechanism and a second position other than the first position. When the target door liner is located at the first position, the first driving assembly drives the positioning mechanism to move towards the target door liner to position the target door liner, and the second driving assembly drives the punching mechanism to move towards the target door liner to punch the target door liner. The punching assembly and the positioning assembly have an area smaller than the area of the target door liner in the orthographic projection on the target door liner.

[0010] Optionally, the refrigerator door liner trimming device, the trimming device further comprises a supporting and limiting mechanism mounted on the lower frame, the supporting and limiting mechanism comprises two groups of driving cylinders and a limiting rod connected with the driving cylinders, the two groups of driving cylinders can drive the limiting rod to move in a first direction to have a limiting position and a supporting position;

[0011] When being in the limiting position, the limiting rod is located outside the positioning mechanism and is used to abut against the outside of the positioning frame;

[0012] When being in the supporting position, the limiting rod is located below the positioning mechanism and is used to abut against the below of the positioning frame.

[0013] Optionally, the refrigerator door liner trimming device, the trimming device further comprises a sliding mechanism, the sliding mechanism comprises a sliding block arranged on one of the lower frame and the limiting rod and a sliding rail arranged on the other one, the sliding rail is matched with the sliding block.

[0014] Optionally, the refrigerator door liner trimming device, the first driving assembly comprises a first driving motor, a first rotating shaft arranged in a second direction and a first transmission component connecting the first rotating shaft and the connecting rod, the first transmission component can convert the rotating motion of the first driving motor into the linear motion of the positioning frame along the connecting rod.

[0015] Optionally, the refrigerator door liner trimming device, the positioning frame is provided with a connecting hole matched with the connecting rod, the connecting rod is arranged through the connecting hole.

[0016] The transmission component comprises a gear arranged outside the first rotating shaft, and part of the gear is located in the connecting hole, the connecting rod is provided with gear teeth matched with the gear.

[0017] Optionally, the refrigerator door liner trimming device, the positioning frame comprises a mounting rack for mounting the positioning assembly and a connecting rack surrounding outside the mounting rack, the connecting rack comprises mounting plates connected with the mounting rack and arranged in the second direction and a connecting seat clamped and fixed between the two mounting plates, the connecting hole is located on the connecting seat, one side of the connecting seat is provided with a notch, and the gear is located in the connecting hole from the notch.

[0018] Optionally, the refrigerator door liner trimming device, the second driving assembly comprises a second driving motor, a second rotating shaft arranged in a second direction and a second transmission component connecting the second rotating shaft and the punching mechanism, the second transmission component can convert the rotating motion of the second driving motor into the linear motion of the punching mechanism along the connecting rod.

[0019] Optionally, the refrigerator door liner trimming device, the second transmission component comprises a cam sleeved on the second rotating shaft, a first connecting part connected with the cam, a second connecting part rotatable relative to the first connecting part, and a third connecting part fixed on the punching mechanism, the second connecting part is used for connecting with the third connecting part, and the second driving motor drives the cam to rotate, so as to drive the first connecting part to rotate, thereby driving the third connecting part and the punching mechanism to move up and down.

[0020] Optionally, the refrigerator door liner trimming device, the trimming device further comprises a guide mechanism, the guide mechanism comprises a guide column arranged on one of the punching mechanism and the positioning mechanism and a guide groove arranged on the other and matched with the guide column.

[0021] Optionally, the refrigerator door liner trimming device, one of the punching assembly and the positioning assembly is provided with a positioning column, and the other is provided with a positioning groove matched with the positioning column, and when the punching assembly punches the target door liner, the positioning column is located in the positioning groove.

[0022] Compared with the prior art, the refrigerator door liner trimming device has the following beneficial effects: by arranging the positioning mechanism and the punching mechanism, the positioning assembly of the positioning mechanism can move up and down along the connecting rod under the action of external force, accurately position the target door liner, ensure that the door liner does not deform during trimming, and improve the trimming quality; the punching assembly of the punching mechanism can quickly and accurately punch the target door liner under the action of external force, and the production efficiency is improved; by arranging the first driving assembly and the second driving assembly to drive the positioning mechanism and the punching mechanism to move up and down respectively, the trimming process is automated, manual intervention is reduced, and the production efficiency and consistency are improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a structural schematic view of the refrigerator door liner trimming device shown in the present application;

[0024] Figure 2 is Figure 1 a lower frame schematic view of the refrigerator door liner trimming device shown in the present application;

[0025] Figure 3 is Figure 1 a structural schematic view of the positioning mechanism of the refrigerator door liner trimming device shown in the present application;

[0026] Figure 4 is Figure 1 a structural schematic view of the positioning mechanism of the refrigerator door liner trimming device shown in the present application;

[0027] Figure 5 is Figure 4is a partial enlarged view of the cutting device of the refrigerator door liner;

[0028] Figure 6 is Figure 1 is a schematic view of the positioning mechanism and the cutting mechanism of the cutting device of the refrigerator door liner;

[0029] Figure 7 is Figure 1 is another schematic view of the positioning mechanism and the cutting mechanism of the cutting device of the refrigerator door liner from another direction;

[0030] Figure 8 is Figure 7 is a partial enlarged view of the cutting device of the refrigerator door liner;

[0031] Figure 9 is Figure 1 is a schematic view of the upper frame and the cutting mechanism of the cutting device of the refrigerator door liner.

[0032] Reference signs:

[0033] 1-frame, 11-upper frame, 12-lower frame, 13-connecting rod;

[0034] 2-positioning mechanism, 21-positioning frame, 211-connecting hole, 212-mounting bracket, 213-connecting bracket, 214-mounting plate, 215-connecting seat, 216-notch, 22-positioning assembly;

[0035] 3-cutting mechanism, 31-cutting frame, 32-cutting assembly;

[0036] 4-driving mechanism, 41-first driving assembly, 411-first driving motor, 412-first rotating shaft, 413-first transmission part, 4131-gear, 4132-tooth, 42-second driving assembly, 421-second driving motor, 422-second rotating shaft, 423-second transmission part, 4231-cam, 4232-first coupling part, 4233-second coupling part, 4234-third coupling part;

[0037] 5-guiding mechanism, 51-guiding column, 52-guiding groove, 53-positioning column, 54-positioning groove;

[0038] 6-supporting and limiting mechanism, 61-driving cylinder, 62-limiting rod;

[0039] 7-sliding mechanism, 71-sliding block, 72-sliding rail. DETAILED DESCRIPTION

[0040] The exemplary embodiments disclosed in this application will now be described in more detail. Numerous specific details are set forth in the following description to provide a more thorough understanding of this application. However, it will be apparent to those skilled in the art that this application can be implemented without one or more of these details. In other instances, to avoid confusion with this application, some technical features well-known in the art have not been described; that is, not all features of actual embodiments are described herein, nor are well-known functions and structures described in detail.

[0041] It should be understood that when an element or layer is referred to as "on," "adjacent to," "connected to," or "coupled to" other elements or layers, it may be directly on, adjacent to, connected to, or coupled to other elements or layers, or there may be intervening elements or layers. Conversely, when an element is referred to as "directly on," "directly adjacent to," "directly connected to," or "directly coupled to" other elements or layers, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc., may be used to describe various elements, components, areas, layers, and / or portions, these elements, components, areas, layers, and / or portions should not be limited by these terms. These terms are only used to distinguish one element, component, area, layer, or portion from another element, component, area, layer, or portion. Therefore, without departing from the teachings of this application, the first element, component, area, layer, or portion discussed below may be referred to as a second element, component, area, layer, or portion. And the discussion of a second element, component, area, layer, or portion does not imply that the first element, component, area, layer, or portion necessarily exists in this application.

[0042] Spatial relation terms such as “below,” “under,” “below,” “under,” “above,” “above,” etc., are used here for convenience to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms are intended to also include different orientations of devices in use and operation.

[0043] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. When used herein, the singular forms “a,” “an,” and “ / the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “compose” and / or “comprising,” when used in this specification, identify the presence of features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups. When used herein, the term “and / or” includes any and all combinations of the associated listed items.

[0044] For a thorough understanding of the present application, detailed steps and detailed structures will be presented in the following description in order to illustrate the technical solutions of the present application. The preferred embodiments of the present application are described in detail as follows, however, in addition to these detailed descriptions, the present application can also have other implementation manners.

[0045] In the refrigerator manufacturing process, the processing of the door liner is an important link. Precise trimming operation can ensure the dimensional accuracy and appearance quality of the door liner, thereby affecting the overall performance and aesthetics of the refrigerator.

[0046] However, in the field, the trimming operation is usually pure manual trimming operation, which not only has insufficient cutting accuracy, but also has low trimming efficiency; or is semi-automatic trimming operation using simple single-machine shearing equipment, which also has low efficiency. According to the statistics of the researchers, in the pure manual trimming operation, 2-4 people are needed for manual cutting, which wastes labor and the efficiency can only reach 180-240 pieces / hour; while the semi-automatic simple single-machine shearing equipment only needs one person to operate, but the efficiency can only reach 120-150 pieces / hour.

[0047] In order to solve the above problems, the present application provides a refrigerator door liner trimming device, which realizes full-automatic trimming of the refrigerator door liner. The device has a reasonable structure design and can efficiently and accurately complete the trimming work of the refrigerator door liner. After using the device, the refrigerator door liner production process can be completely automated, which can help the production enterprises save 1-4 people of labor compared with the traditional process; the production efficiency is improved by 17% to 33% compared with manual cutting, and is improved by 87% to 100% compared with the simple single-machine shearing equipment.

[0048] Reference Figure 1As shown, the trimming device includes a frame 1, a positioning mechanism 2, a punching mechanism 3, and a driving mechanism 4 and a conveying track. The frame 1 includes an upper frame 11 and a lower frame 12 and a connecting rod 13 for connecting the upper frame 11 and the lower frame 12, the positioning mechanism 2 and the punching mechanism 3 are located between the upper frame 11 and the lower frame 12, and the conveying track is arranged between the positioning mechanism 2 and the punching mechanism 3 along a first direction; the driving mechanism 4 includes a first driving assembly 41 arranged on the positioning mechanism 2 and a second driving assembly 42 arranged on the upper frame 11, the target door barrel can move along the conveying track to have a first position between the positioning mechanism 2 and the punching mechanism 3 and a second position other than the first position, when located at the first position, the first driving assembly 41 drives the positioning mechanism 2 to move towards the target door barrel for positioning, and the second driving assembly 42 drives the punching mechanism 3 to move towards the target door barrel and the positioning mechanism 2 to realize the trimming operation on the door barrel on the conveying track, which is high in automation and strong in applicability, reduces manual work, improves production efficiency, and has simple structure and low cost. It should be noted that in the embodiment, the punching assembly 32 and the positioning assembly 22 have a projection area on the target door barrel smaller than the area of the target door barrel, so as to trim the door barrel to obtain the required specification.

[0049] Specifically, with reference to Figures 3-5 As shown, the positioning mechanism 2 includes a positioning frame 21 and a positioning assembly 22 arranged on the positioning frame 21, the first driving assembly is arranged on the positioning frame 21, and the positioning frame 21 can move up and down along the connecting rod 13 under the action of an external force, that is, the first driving assembly 41 provides an external force for the positioning frame 21 to drive the positioning assembly 22 to move up and down for positioning the target door barrel; the punching mechanism 3 includes a punching frame 31 and a punching assembly 32 arranged on the punching frame 31, and the punching frame 31 can move up and down along the connecting rod 13 under the action of an external force, that is, the second driving assembly 42 provides an external force for the punching frame 31 to drive the punching assembly 32 to move up and down for punching the target door barrel. It can be understood that the positioning assembly 22 can first position the door barrel to be trimmed, which can prevent the punching mechanism 3 and the positioning mechanism 2 from cooperating with each other to ensure the punching accuracy and meet the processing requirements.

[0050] More specifically, with reference to Figures 6-8As shown, the edge cutting device further comprises a guide mechanism 5, which comprises guide posts 51 arranged on one of the punching mechanism 3 and the positioning mechanism 2 and guide grooves 52 arranged on the other and matched with the guide posts 51. In this embodiment, a plurality of guide posts 51 are arranged around the positioning mechanism 2, and the punching mechanism 3 is provided with guide grooves 52 matched with the guide posts 51 one by one. When the positioning mechanism 2 and the punching mechanism 3 are closed, each guide post 51 is located in the corresponding guide groove 52, so that the punching mechanism 3 and the positioning mechanism 2 are tightly fitted, preventing the punching mechanism 3 and the positioning mechanism 2 from being unable to approach in the height direction, thereby achieving precise edge cutting of the target door barrel. It should be noted that the positioning mechanism 2 comprises a positioning plate for positioning the target door barrel, and the punching mechanism 3 comprises a punching piece for cutting, wherein the mounting form of the positioning plate and the punching piece is not specifically limited here and can be adjusted according to actual needs, which will not be described here.

[0051] Further, one of the punching assembly 32 and the positioning assembly 22 is provided with a positioning post 53, and the other is provided with a positioning groove 54 matched with the positioning post 53. In this embodiment, the positioning plate is smaller than the punching piece, the positioning groove 54 is located on the punching piece, and the positioning post 53 is located on the positioning plate. When the punching assembly 32 punches the target door barrel, the positioning post 53 is located in the positioning groove 54 to prevent the positioning plate and the punching piece from being positionally offset in the horizontal direction, further improving the edge cutting precision.

[0052] In this embodiment, as shown in Figure 1 and Figure 2 As shown, the edge cutting device further comprises a support limiting mechanism 6 mounted on the lower frame 12, which comprises two groups of driving cylinders 61 and limiting rods 62 connected with the driving cylinders 61. The two groups of driving cylinders 61 can drive the limiting rods 62 to move in the first direction to have a limiting position and a supporting position. When located at the limiting position, the limiting rod 62 is located outside the positioning mechanism 2 and is used to abut against the outside of the positioning frame 21. When located at the supporting position, the limiting rod 62 is located below the positioning mechanism 2 and is used to abut against the lower side of the positioning frame 21 to support the positioning mechanism 2, improve the stability, and prevent the impact force from being too large when the punching mechanism 3 and the positioning mechanism 2 are closed, causing a gap between them and failing to cut the edge accurately.

[0053] In this embodiment, the edge cutting device further comprises a sliding mechanism 7, which comprises a sliding block 71 arranged on one of the lower frame 12 and the limiting rod 62 and a sliding rail 72 arranged on the other and matched with the sliding block 71. The driving cylinders 61 drive the limiting rods 62 to move in the first direction under the action of the sliding block 71 and the sliding rail 72.

[0054] As described above, the first driving assembly 41 comprises the first driving motor 411, the first rotating shaft 412 arranged in the second direction, and the first transmission component 413 connecting the first rotating shaft 412 and the connecting rod 13, and the first transmission component 413 can convert the rotating motion of the first driving motor 411 into the linear motion of the positioning frame 21 along the connecting rod 13, and the transmission mode is simple and direct, reduces the energy loss and deviation in the motion process, ensures that the positioning frame 21 can accurately move according to the predetermined track, ensures the accuracy and consistency of each positioning, thereby improving the quality of door liner trimming and product qualification rate.

[0055] Further, the positioning frame 21 is provided with the connecting hole 211 matched with the connecting rod 13, and the connecting rod 13 penetrates through the connecting hole 211; the transmission component comprises the gear 4131 sleeved outside the first rotating shaft 412, and part of the gear 4131 is located in the connecting hole 211, and the connecting rod 13 is provided with the gear teeth 4132 matched with the gear 4131. It can be understood that by arranging the connecting hole 211 matched with the connecting rod 13 on the positioning frame 21, and the connecting rod 13 penetrating through the connecting hole 211, the close connection between the positioning frame 21 and the connecting rod 13 is realized, the stability of the positioning frame 21 in the up-down movement process is ensured, and the shaking or deviation of the positioning frame 21 in the horizontal direction is prevented, and at the same time, the meshing mode of the gear 4131 and the gear teeth 4132 on the connecting rod 13 not only transmits the rotating force of the first rotating shaft 412 to the positioning frame 21, but also further enhances the stability of the connection between the two.

[0056] Further, the positioning frame 21 comprises the mounting frame 212 for mounting the positioning assembly 22 and the connecting frame 213 surrounding the outside of the mounting frame 212, the connecting frame 213 comprises the mounting plate 214 connected with the mounting frame 212 and arranged in the second direction, and the connecting seat 215 clamped and fixed between the two mounting plates 214, the connecting hole 211 is located on the connecting seat 215, and the connecting seat 215 is provided with the notch 216 on one side, and the gear 4131 is partially located in the connecting hole 211 from the notch 216. It can be understood that by arranging the connecting frame 213 as the mounting plate 214 and the connecting seat 215 fixed between the two mounting plates 214, the connecting hole 211 is located on the connecting seat 215, and the connecting seat 215 is provided with the notch 216 on one side, so that the gear 4131 is partially located in the connecting hole 211 from the notch 216, that is, the gear 4131 is arranged on the connecting frame 213, and cooperates with the gear teeth 4132 on the connecting rod 13 penetrating through the connecting hole 211, and is reasonably arranged, and the gear 4131 and the gear teeth 4132 structure do not need to be separately arranged, so that the whole device is more compact, and the occupied space is reduced.

[0057] As described above, with reference to Figure 9As shown, the second driving assembly 42 comprises a second driving motor 421, a second rotating shaft 422 extending in the second direction, and a second transmission component 423 connecting the second rotating shaft 422 and the punching mechanism 3, and the second transmission component 423 can convert the rotating motion of the second driving motor 421 into the linear motion of the punching mechanism 3 along the connecting rod 13.

[0058] Further, the second transmission component 423 comprises a cam 4231 sleeved on the second rotating shaft 422, a first connecting part 4232 connected with the cam 4231, a second connecting part 4233 rotatable relative to the first connecting part 4232, and a third connecting part 4234 fixed on the punching mechanism 3, the second connecting part 4233 is used for connecting with the third connecting part 4234, and the second driving motor 421 drives the cam 4231 to rotate to drive the first connecting part 4232 to rotate, so as to drive the third connecting part 4234 and the punching mechanism 3 to move up and down.

[0059] It can be understood that the second transmission component 423 adopts the unique structure of the cam 4231, the first connecting part 4232, the second connecting part 4233 and the third connecting part 4234, which can realize the accurate control of the up and down movement of the punching mechanism 3. Through the transmission structure of the cam 4231, the punching mechanism 3 can be buffered to avoid impacting the door liner.

[0060] In summary, the working process of the refrigerator door liner edge cutting device in the embodiment is as follows: the target door liner reaches the first position, the first driving assembly drives the positioning frame to drive the positioning assembly to move upward to position the target door liner, the driving cylinder drives the limiting rod to move from the limiting position to the supporting position, so that the limiting rod abuts against the lower part of the positioning assembly, then the second driving assembly drives the punching assembly to move downward, so that the guide column is inserted into the guide groove, so that the punching piece is tightly attached to the positioning plate, at the same time, the positioning column is clamped in the positioning groove to prevent the punching piece from deviating horizontally from the positioning plate, thereby realizing the edge cutting of the door liner.

[0061] The above is only one specific embodiment of the present application, and any improvement made on the basis of the concept of the present application is considered to be within the protection scope of the present application.

Claims

1. A refrigerator door liner trimming device, characterized by, The cutting device comprises a frame, a positioning mechanism, a punching mechanism, a driving mechanism and a conveying track. The frame comprises an upper frame, a lower frame and a connecting rod for connecting the upper frame and the lower frame. The positioning mechanism is located between the upper frame and the lower frame and comprises a positioning frame and a positioning assembly arranged on the positioning frame. The positioning frame can move up and down along the connecting rod under external force to drive the positioning assembly to move up and down to position a target door core. The punching mechanism is located between the positioning mechanism and the upper frame and comprises a punching frame and a punching assembly arranged on the punching frame. The punching frame can move up and down along the connecting rod under external force to drive the punching assembly to move up and down to punch the target door core.

2. The refrigerator door liner trimming device according to claim 1, characterized in that, The driving mechanism comprises a first driving assembly arranged on the positioning frame and a second driving assembly arranged on the upper frame. The first driving assembly can drive the positioning mechanism to move up and down. The second driving assembly can drive the punching mechanism to move up and down.

3. The refrigerator door liner trimming device according to claim 2, characterized in that, The conveying track is arranged between the positioning mechanism and the punching mechanism in a first direction.

4. The refrigerator door liner trimming apparatus according to claim 1, wherein The target door core can move along the conveying track to have a first position between the positioning mechanism and the punching mechanism and a second position other than the first position.

5. The refrigerator door liner trimming device according to claim 4, characterized in that, When the target door core is located at the first position, the first driving assembly drives the positioning mechanism to move towards the target door core to position the target door core. The second driving assembly drives the punching mechanism to move towards the target door core to punch the target door core. The punching assembly and the positioning assembly have a projection area on the target door core smaller than the area of the target door core. The cutting device further comprises a support limiting mechanism arranged on the lower frame. The support limiting mechanism comprises two groups of driving cylinders and limiting rods connected with the driving cylinders. The two groups of driving cylinders can drive the limiting rods to move in a first direction to have a limiting position and a supporting position. When the limiting rods are located at the limiting position, the limiting rods are located outside the positioning mechanism and abut against the outside of the positioning frame. When the limiting rods are located at the supporting position, the limiting rods are located below the positioning mechanism and abut against the below of the positioning frame. The cutting device further comprises a sliding mechanism. The sliding mechanism comprises a sliding block arranged on one of the lower frame and the limiting rods and a sliding rail arranged on the other one. The sliding rail is matched with the sliding block. The first driving assembly comprises a first driving motor, a first rotating shaft arranged in a second direction and a first transmission member connecting the first rotating shaft and the connecting rod. The first transmission member can convert the rotating motion of the first driving motor into the linear motion of the positioning frame along the connecting rod. The positioning frame is provided with a connecting hole matched with the connecting rod. The connecting rod passes through the connecting hole. The transmission member comprises a gear arranged outside the first rotating shaft. Part of the gear is located in the connecting hole. The connecting rod is provided with gear teeth matched with the gear.

6. The refrigerator door liner trimming device according to claim 5, characterized in that, The positioning frame comprises a mounting frame for mounting the positioning assembly and a connecting frame surrounding outside of the mounting frame, the connecting frame comprises mounting plates connected with the mounting frame and arranged along the second direction and connecting seats clamped and fixed between the two mounting plates, the connecting holes are located on the connecting seats, one side of the connecting seat is provided with a notch, and the gear is located in the connecting hole from the notch part.

7. The refrigerator door liner trimming apparatus according to claim 1, wherein The second driving assembly comprises a second driving motor, a second rotating shaft arranged in the second direction and a second transmission part connecting the second rotating shaft and the punching mechanism, and the second transmission part can convert the rotating motion of the second driving motor into the linear motion of the punching mechanism along the connecting rod.

8. The refrigerator door liner trimming device according to claim 7, characterized in that, The second transmission part comprises a cam sleeved on the second rotating shaft, a first connecting part connected with the cam, a second connecting part rotatable relative to the first connecting part and a third connecting part fixed on the punching mechanism, the second connecting part is used for being connected with the third connecting part, the second driving motor drives the cam to rotate, so as to drive the first connecting part to rotate, thereby driving the third connecting part and the punching mechanism to move up and down.

9. The refrigerator door liner trimming apparatus according to any one of claims 1-8, characterized in that, The edge cutting device further comprises a guide mechanism, the guide mechanism comprises a guide column arranged on one of the punching mechanism and the positioning mechanism and a guide groove arranged on the other and matched with the guide column.

10. The refrigerator door liner trimming apparatus according to any one of claims 1-8, wherein, One of the punching assembly and the positioning assembly is provided with a positioning column, and the other is provided with a positioning groove matched with the positioning column, and when the punching assembly punches the target door barrel, the positioning column is located in the positioning groove.

Images