Device for eliminating deviation of rotating center

Abstract

The utility model discloses a device for eliminating rotation center deviation, which relates to the technical field of cantilever type tray winding machines, and comprises a positioning shell, a rotating shaft, a rotating shaft and a rotating shaft, the neat curved surface body is movably arranged in the cavity of the positioning shell, the outer wall of the neat curved surface body is in clearance fit with the inner wall of the positioning hole, an air cylinder connecting guide rod is vertically and fixedly connected to the top of the neat curved surface body, and the top of the air cylinder connecting guide rod penetrates through the positioning hole and extends to the position above the positioning shell; the bottom plate is fixedly connected to the side, away from the positioning hole, of the positioning shell. According to the utility model, the curve outer wall of the neat curved surface body is in clearance fit with the inner wall of the positioning hole, so that self-centering positioning is realized, the deviation when the guide rod and the cantilever are not concentric is eliminated, the disc does not deviate any more, and the packaging quality of the tray is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of cantilever pallet winding machines, and in particular to a device for eliminating rotation center offset. Background Technology

[0002] The cantilever pallet wrapping machine is a high-efficiency packaging machine mainly used to wrap and package goods on pallets. It tightly wraps the goods with stretch film to prevent them from being damaged by collisions, squeezing, etc. during transportation, so as to fix and protect the goods and facilitate storage and transportation.

[0003] In the existing technology, cantilever pallet wrapping machines must be equipped with a top pressing mechanism during the wrapping process to prevent the pallet top frame from moving. However, due to processing or installation deviations, the center of the top pressing device and the center of the rotating arm may not coincide in current cantilever pallet wrapping machines. It is difficult to ensure that the rotation center of the cantilever and the axis of the top pressing mechanism are consistent. This causes the top pressing disc to shift back and forth during the wrapping process, thereby pushing the pallet top frame to move. The outer dimensions of the pallet change, resulting in a decrease in pallet packaging quality.

[0004] To address the aforementioned problems, a device for eliminating rotation center offset is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a device for eliminating the offset of the rotation center, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a device for eliminating rotation center offset, comprising:

[0007] A positioning housing, wherein the interior of the positioning housing is a hollow cavity structure, and a positioning hole is provided at the center of the top axis of the positioning housing;

[0008] A neat curved surface body is movably disposed in the cavity of the positioning housing. The outer wall of the neat curved surface body is clearance-fitted with the inner wall of the positioning hole. A cylinder connecting guide rod is vertically fixedly connected to the top of the neat curved surface body, and the top of the cylinder connecting guide rod extends through the positioning hole to the top of the positioning housing.

[0009] The base plate is fixedly connected to the side of the positioning housing away from the positioning hole.

[0010] Preferably, a wear-resistant bushing is fixedly connected to the inner wall of the positioning hole. The inner cavity of the wear-resistant bushing is a frustum shape that is narrower at the top and wider at the bottom. The wear-resistant bushing is made of any one of polytetrafluoroethylene, nylon, or polyester fiber.

[0011] Preferably, the inner wall of the positioning hole and the outer wall of the wear-resistant bushing are both truncated cone-shaped with a narrow top and a wide bottom, and the wear-resistant bushing is provided with an installation component between the positioning housing and the positioning housing. The installation component is used to lock and fix the wear-resistant bushing at the positioning hole position.

[0012] Preferably, the mounting components include:

[0013] A cylindrical tube is fixedly connected to the end of the wear-resistant bushing away from the workpiece curved surface, and the cylindrical tube extends above the positioning hole;

[0014] A positioning nut, which is threaded onto the outer wall of a cylindrical tube, has a diameter larger than the diameter of the positioning hole.

[0015] Preferably, the wear-resistant bushing is composed of two semi-circular frustum tubes spliced ​​together, and the cylindrical tube is composed of two semi-circular cylindrical tubes spliced ​​together. One end of the semi-circular frustum tube is fixedly connected to the opposite end of the semi-circular cylindrical tube, and the outer walls of the two semi-circular cylindrical tubes are provided with external thread grooves that match the cylindrical tube.

[0016] Preferably, the shaped curved surface is a sphere, and the top and bottom of the shaped curved surface are provided with horizontal cross-sections. A first connecting mechanism is provided between the shaped curved surface and the cylinder connecting guide rod, and the shaped curved surface is fixed to the bottom of the cylinder connecting guide rod through the first connecting mechanism.

[0017] Preferably, the first connecting mechanism includes:

[0018] The mounting through hole is vertically opened at the axis of the workpiece curved surface;

[0019] The truncated cylindrical column, the mounting through hole and the truncated cylindrical column are both truncated cylindrical in shape, wider at the top and narrower at the bottom. The truncated cylindrical column is vertically inserted into the mounting through hole. The top of the truncated cylindrical column is fixedly connected to the bottom of the cylinder connecting guide rod. The top diameter of the truncated cylindrical column is larger than the top diameter of the mounting through hole.

[0020] An extension screw is fixedly connected to the bottom end of a frustum column and extends to a position below the shaped curved surface. A limiting component is provided on the extension screw, which is used for blocking and positioning at the bottom end of the shaped curved surface.

[0021] Preferably, the limiting component includes a clamping nut, which is threaded to the outer wall of the extension screw. An auxiliary pad is provided on the side of the clamping nut near the workpiece, and the diameter of the auxiliary pad is larger than the diameter of the clamping nut.

[0022] Preferably, the shaped curved surface is a hollow frustum tube composed of multiple petal molds spliced ​​together, which is narrow at the top and wide at the bottom. An adjustment mechanism is provided between the cylinder connecting guide rod and the shaped curved surface, and the adjustment mechanism is used to adjust the expansion size of the shaped curved surface.

[0023] Preferably, the adjustment mechanism includes:

[0024] The symmetrical curved surface is a frustum that is narrow at the top and wide at the bottom. Both ends of the symmetrical curved surface are fixedly connected to adjusting screws. The adjusting frustum is fixedly connected to the bottom end of the cylinder connecting guide rod through one of the adjusting screws. Multiple petal molds are wrapped around the outer wall of the adjusting frustum.

[0025] The clamping spring has arc-shaped grooves at both ends of the outer walls of the multiple neat curved surfaces for the clamping spring to be fitted.

[0026] An adjusting nut is threaded onto the outer wall of an adjusting screw, and a limit end cap is fixedly connected to the side of the adjusting nut near the adjusting frustum.

[0027] Compared with the prior art, the technical effects of this utility model are as follows:

[0028] This invention features a precisely curved surface within the inner cavity of the positioning housing. A positioning hole at the top of the housing connects the cylinder connecting rod to the precisely curved surface. When the cylinder connecting rod is driven by the cylinder to move the precisely curved surface toward the positioning hole, the outer curved wall of the precisely curved surface forms a clearance fit with the inner wall of the positioning hole, achieving self-centering positioning. This eliminates deviations when the guide rod and the cantilever are not concentric, preventing the disc from shifting and improving the quality of pallet packaging. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of a partial three-dimensional cross-sectional view of the present invention.

[0030] Figure 2 This is a three-dimensional half-sectional view of the positioning shell of this utility model.

[0031] Figure 3 This is a front cross-sectional view of the neat curved surface in Embodiment 2 of this utility model.

[0032] Figure 4 This is a front cross-sectional view of the neat curved surface in Embodiment 3 of this utility model. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] This utility model provides, for example Figures 1-4 The diagram shows a device for eliminating rotation center offset.

[0035] Example 1, such as Figure 1 As shown, the system includes a positioning housing 100, a curved surface body 400, and a base plate 200. The positioning housing 100 has a hollow cavity structure. A positioning hole 101 is provided at the axial center of the top of the positioning housing 100. The curved surface body 400 is movably disposed within the cavity of the positioning housing 100. The outer wall of the curved surface body 400 is clearance-fitted with the inner wall of the positioning hole 101. A cylinder connecting guide rod 300 is vertically fixedly connected to the top of the curved surface body 400, and the top of the cylinder connecting guide rod 300 extends through the positioning hole 101 to the top of the positioning housing 100. Plate 200 is fixedly connected to the side of positioning housing 100 away from positioning hole 101. When cylinder connecting guide rod 300 drives the shaped curved body 400 located in the inner cavity of positioning housing 100 to move upward, since the diameter of positioning hole 101 is smaller than the maximum diameter of shaped curved body 400, shaped curved body 400 can form an automatic positioning function with the positioning hole 101 through clearance fit. This can eliminate the deviation problem caused by the guide rod and cantilever not being concentric on the cantilever pallet wrapping machine, so that the disc no longer shifts, which helps to improve the quality of pallet packaging.

[0036] Example 2, as follows Figure 2 As shown, a wear-resistant bushing 102 is fixedly connected to the inner wall of the positioning hole 101. The inner cavity of the wear-resistant bushing 102 is a frustum shape, narrower at the top and wider at the bottom. The wear-resistant bushing 102 is made of any one of polytetrafluoroethylene, nylon, or polyester fiber. Adding the wear-resistant bushing 102 to the inner wall of the positioning hole 101 can protect the positioning hole 101 on the positioning housing 100, preventing the positioning hole 101 from gradually wearing out and losing its function due to the squeezing and friction between the positioning hole 101 and the workpiece curved surface 400. Furthermore, by replacing the wear-resistant bushing 102, the fit and positioning between the workpiece curved surface 400 and the positioning hole 101 can be maintained. The quality of use; the inner wall of the positioning hole 101 and the outer wall of the wear-resistant bushing 102 are both frustum-shaped with a narrow top and a wide bottom, and the wear-resistant bushing 102 is provided with an installation component between the positioning housing 100 and the positioning housing 100. The installation component is used to lock and fix the wear-resistant bushing 102 at the position of the positioning hole 101. In this embodiment, since the positioning hole 101 and the wear-resistant bushing 102 are both frustum-shaped with a narrow top and a wide bottom, and the wear-resistant bushing 102 is subjected to an upward pressure, the wear-resistant bushing 102 only needs to maintain an upward thrust to maintain the tightness between it and the inner wall of the positioning hole 101, thereby ensuring the stability of the wear-resistant bushing 102 installed at the position of the positioning hole 101.

[0037] The mounting components include a cylindrical tube 103 and a positioning nut 104. The cylindrical tube 103 is fixedly connected to the end of the wear-resistant bushing 102 away from the workpiece curved surface 400. The cylindrical tube 103 extends above the positioning hole 101. The positioning nut 104 is threaded onto the outer wall of the cylindrical tube 103. The diameter of the positioning nut 104 is larger than the diameter of the port of the positioning hole 101. The positioning nut 104 is threaded onto the outer wall of the cylindrical tube 103. When the positioning nut 104 is rotated clockwise, it presses down on the top of the positioning housing 100, which provides an upward force to the cylindrical tube 103, thereby providing an upward pulling force to the wear-resistant bushing 102. Combined with the shape fit between the wear-resistant bushing 102 and the positioning hole 101, which is narrower at the top and wider at the bottom, the stability of the wear-resistant bushing 102 in the positioning hole 101 is ensured.

[0038] In other embodiments, the wear-resistant bushing 102 can be composed of two semi-circular frustum tubes joined together, and the cylindrical tube 103 can be composed of two semi-circular tubes joined together. One end of the semi-circular frustum tube is fixedly connected to the opposite end of the cylindrical tube. The outer walls of the two semi-circular tubes are provided with external threaded grooves that match the cylindrical tube 103. By setting the wear-resistant bushing 102 as a splice of two semi-circular frustum tubes, a single semi-circular frustum tube can be inserted into the positioning housing 100 from the outside through the positioning hole 101, or it can be removed from the positioning housing 100 from the inside through the positioning hole 101, thereby facilitating the positioning hole 101 in the positioning housing. The installation, positioning, or removal of the wear-resistant bushing 102 on the positioning housing 100 avoids the need for the wear-resistant bushing 102 to be inserted from the bottom end of the positioning housing 100 to the positioning hole 101 for installation. This makes the installation of the wear-resistant bushing 102 at the positioning hole 101 more convenient and efficient. At the same time, the cylindrical tube 103 is designed as a split structure in conjunction with the wear-resistant bushing 102, and a threaded groove is provided on its outer wall to cooperate with the positioning nut 104. This still satisfies the purpose of keeping the wear-resistant bushing 102 and the positioning hole 101 port pressed and fixed by the rotation of the positioning nut 104 to the top of the positioning housing 100.

[0039] Example 3, such as Figure 3 As shown, the difference between this embodiment and Embodiment 1 is that the spherical curved surface 400 is a sphere, and the top and bottom of the spherical curved surface 400 are provided with horizontal cross-sections. A first connecting mechanism is provided between the spherical curved surface 400 and the cylinder connecting guide rod 300. The spherical curved surface 400 is fixed to the bottom of the cylinder connecting guide rod 300 through the first connecting mechanism. The outer wall of the sphere is a spherical curved surface, which can cooperate with the positioning hole 101 to form automatic positioning, eliminating the deviation problem caused by the guide rod and cantilever not being concentric on the cantilever pallet wrapping machine, so that the disc no longer shifts, and improving the quality of pallet packaging.

[0040] The first connecting mechanism includes a mounting through hole 401, a frustum column 402, and an extension screw 403. The mounting through hole 401 is vertically opened at the axis of the shaped curved surface 400. Both the mounting through hole 401 and the frustum column 402 are frustum-shaped, wider at the top and narrower at the bottom. The frustum column 402 is vertically inserted into the mounting through hole 401. The top of the frustum column 402 is fixedly connected to the bottom of the cylinder connecting guide rod 300. The top diameter of the frustum column 402 is larger than the top diameter of the mounting through hole 401. The extension screw 403 is fixedly connected to the bottom of the frustum column 402 and extends to a position below the shaped curved surface 400. The extension screw 403 is provided with a limiting component, which is used to block and position the bottom of the shaped curved surface 400. The limiting component includes a clamping nut 404, which is threaded to the outer wall of the extension screw 403. The clamping nut 404 has an auxiliary component on the side near the shaped curved surface 400. The diameter of the pad 405 is larger than that of the clamping nut 404. The shaped curved surface 400 is fitted onto the outer wall of the frustum 402 through the mounting through hole 401. The shape of the frustum 402 and the mounting through hole 401 allows for automatic centering of the shaped curved surface 400 on the frustum 402, ensuring that the axis of the shaped curved surface 400 and the cylinder connecting guide rod 300 are on the same vertical line. Furthermore, the top of the frustum 402 can press against the top of the shaped curved surface 400 through the pressing action of the mounting through hole 401. Finally, the clamping nut 404 rotates clockwise and moves upward on the outer wall of the extension screw 403, pressing against the bottom of the shaped curved surface 400 with the auxiliary pad 405. This ensures tight contact between the frustum 402 and the mounting through hole 401, improving the stability of the shaped curved surface 400 on the frustum 402.

[0041] Example 4, such as Figure 4 As shown, the difference between this embodiment and Embodiment 1 is that the symmetrical curved body 400 is a hollow frustum tube composed of multiple petal molds and is narrower at the top and wider at the bottom. An adjustment mechanism is provided between the cylinder connecting guide rod 300 and the symmetrical curved body 400. The adjustment mechanism is used to adjust the expansion size of the symmetrical curved body 400. The hollow frustum tube composed of multiple petal molds also has a curved outer wall. When it cooperates with the positioning hole 101, it can eliminate the deviation problem caused by the guide rod and the cantilever not being concentric on the cantilever pallet wrapping machine, so that the disc no longer shifts, thereby improving the quality of pallet packaging. Furthermore, the multiple petal molds on the symmetrical curved body 400 can be contracted or expanded to change the contact position between the outer wall of the symmetrical curved body 400 and the positioning hole 101. This avoids the situation where the same position on the symmetrical curved body 400 frequently contacts the inner wall of the positioning hole 101, which can easily cause wear and deformation, affecting the accuracy of the symmetrical curved body 400 and the positioning hole 101 in achieving self-centering.

[0042] The adjustment mechanism includes a symmetrical curved surface 400, a clamping spring 411, and an adjusting nut 415. The symmetrical curved surface 400 is a frustum-shaped body that is narrower at the top and wider at the bottom. Adjusting screws 413 are fixedly connected to both ends of the symmetrical curved surface 400. The adjusting frustum 412 is fixedly connected to the bottom end of the cylinder connecting guide rod 300 via one of the adjusting screws 413. Multiple lobes are wrapped around the outer wall of the adjusting frustum 412. Arc-shaped grooves for the clamping spring 411 are provided at both ends of the outer wall of the multiple symmetrical curved surfaces 400. The adjusting nut 415 is threaded onto the outer wall of the adjusting screw 413. A limit end cap 414 is fixedly connected to the side of the adjusting nut 415 closest to the adjusting frustum 412. The adjustment mechanism adjusts the position of the adjusting nut 415 on the adjusting frustum 412 by rotation. The position of the adjusting nut 415 on the adjusting screw 413 at both ends of 412 is adjusted to achieve the vertical position of the adjusting frustum 412 inside the shaped curved surface 400. The inclined surface of the adjusting frustum 412 can cooperate with the inclined surface of the inner wall of the shaped curved surface 400, and through the elastic clamping action of the clamping spring 411, the multiple lobes of the shaped curved surface 400 can be horizontally expanded or contracted, changing the diameter of the outer wall of the shaped curved surface 400 at different heights. This allows the outer wall of the shaped curved surface 400 to have multiple positions that contact the inner wall of the positioning hole 101, satisfying the changing use of different outer wall positions on the shaped curved surface 400 and extending the service life of the shaped curved surface 400.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for eliminating rotation center offset, characterized in that, include: The positioning housing (100) has a hollow cavity structure inside, and a positioning hole (101) is provided at the top axis of the positioning housing (100). A neat curved surface (400) is movably disposed in the cavity of the positioning housing (100). The outer wall of the neat curved surface (400) is clearance-fitted with the inner wall of the positioning hole (101). A cylinder connecting guide rod (300) is vertically fixedly connected to the top of the neat curved surface (400), and the top of the cylinder connecting guide rod (300) extends through the positioning hole (101) to the top of the positioning housing (100). The base plate (200) is fixedly connected to the side of the positioning housing (100) away from the positioning hole (101).

2. The device for eliminating rotation center offset according to claim 1, characterized in that, The inner wall of the positioning hole (101) is fixedly connected to a wear-resistant bushing (102). The inner cavity of the wear-resistant bushing (102) is a frustum shape that is narrow at the top and wide at the bottom. The wear-resistant bushing (102) is made of any one of polytetrafluoroethylene, nylon or polyester fiber.

3. The device for eliminating rotation center offset according to claim 2, characterized in that, The inner wall of the positioning hole (101) and the outer wall of the wear-resistant bushing (102) are both truncated cones that are narrower at the top and wider at the bottom. The wear-resistant bushing (102) is provided with an installation component between the positioning housing (100) and the installation component is used to lock and fix the wear-resistant bushing (102) at the position of the positioning hole (101).

4. The device for eliminating rotation center offset according to claim 3, characterized in that, The installation components include: A cylindrical tube (103) is fixedly connected to one end of the wear-resistant bushing (102) away from the workpiece curved body (400), and the cylindrical tube (103) extends above the positioning hole (101); A positioning nut (104) is threaded onto the outer wall of a cylindrical tube (103), and the diameter of the positioning nut (104) is larger than the diameter of the positioning hole (101).

5. The apparatus for eliminating rotation center offset according to claim 4, characterized in that, The wear-resistant bushing (102) is composed of two semi-circular truncated tubes spliced ​​together, and the cylindrical tube (103) is composed of two semi-circular tubes spliced ​​together. One end of the semi-circular truncated tube is fixedly connected to the opposite end of the semi-circular tube. The outer walls of the two semi-circular tubes are provided with external thread grooves that match the cylindrical tube (103).

6. The device for eliminating rotation center offset according to claim 1, characterized in that, The spherical curved surface (400) is a sphere. The top and bottom of the spherical curved surface (400) are provided with horizontal cross-sections. A first connecting mechanism is provided between the spherical curved surface (400) and the cylinder connecting guide rod (300). The spherical curved surface (400) is fixed to the bottom of the cylinder connecting guide rod (300) through the first connecting mechanism.

7. The apparatus for eliminating rotation center offset according to claim 6, characterized in that, The first connecting mechanism includes: Mounting through hole (401), which is vertically opened at the axis of the workpiece curved surface (400); The truncated cone (402) has a wide top and narrow bottom. The truncated cone (402) is vertically inserted into the mounting through hole (401). The top of the truncated cone (402) is fixedly connected to the bottom of the cylinder connecting guide rod (300). The top diameter of the truncated cone (402) is larger than the top diameter of the mounting through hole (401). An extension screw (403) is fixedly connected to the bottom end of the frustum column (402) and extends to the position below the workpiece curved body (400). A limiting component is provided on the extension screw (403), which is used for blocking and positioning at the bottom end of the workpiece curved body (400).

8. The apparatus for eliminating rotation center offset according to claim 7, characterized in that, The limiting component includes a clamping nut (404), which is threaded to the outer wall of the extension screw (403). An auxiliary pad (405) is provided on the side of the clamping nut (404) near the workpiece curved body (400), and the diameter of the auxiliary pad (405) is larger than the diameter of the clamping nut (404).

9. The device for eliminating rotation center offset according to claim 1, characterized in that, The neat curved surface (400) is a hollow frustum tube composed of multiple petal molds spliced ​​together and is narrow at the top and wide at the bottom. An adjustment mechanism is provided between the cylinder connecting guide rod (300) and the neat curved surface (400), and the adjustment mechanism is used to adjust the expansion size of the neat curved surface (400).

10. The apparatus for eliminating rotation center offset according to claim 9, characterized in that, The adjustment mechanism includes: The well-formed curved surface (400) and the adjusting frustum (412) are provided. The well-formed curved surface (400) is a frustum that is narrow at the top and wide at the bottom. Both ends of the well-formed curved surface (400) are fixedly connected to adjusting screws (413). The adjusting frustum (412) is fixedly connected to the bottom end of the cylinder connecting guide rod (300) through one of the adjusting screws (413). Multiple petal molds are wrapped around the outer wall of the adjusting frustum (412). The clamping spring (411) has arc-shaped grooves at both ends of the outer walls of the plurality of regular curved surfaces (400) for the clamping spring (411) to be fitted. Adjusting nut (415) is threaded to the outer wall of adjusting screw (413), and a limit end cap (414) is fixedly connected to the side of adjusting nut (415) near adjusting truncated cone (412).

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