Adjusting structure for parallelism between double shafts

Abstract

The utility model relates to a parallelism adjusting structure between double shafts, which is used for realizing parallelism adjustment of the double shafts in off-line and off-line states. Comprising a shaft seat and a shaft arranged on the shaft seat, and the second end of the shaft is assembled with the shaft seat through a posture adjusting part; and the posture of the second end is adjusted through the posture adjusting part. The axial posture of the shaft is rapidly adjusted, the effect of the two-shaft parallel precision requirement of the terminal is achieved, the overall assembling difficulty of equipment is reduced, and the assembling efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of mechanical assembly structures, and in particular to a parallelism adjustment structure between two axes. Background Technology

[0002] In a slitting machine, the winding shaft of the winding unit needs to be parallel to the upstream guide roller. If the parallelism between these two shafts is not met, the tension of the wound film will be uneven. Therefore, the issue of parallelism between the two shafts has a significant impact on the quality of film winding.

[0003] Reference application number 2022107742632, entitled "An Invention Patent for a Film Material Winding Mechanism and a Double Unwinding Slitting Machine," discloses a winding mechanism with a mainstream structure, including a winding bracket, winding arm, air shaft, guide rail, and transmission gears. In this structure, due to the large number of components and the cumulative tolerances between them, the parallelism error between the winding shaft and the upstream guide roller is very large. To ensure that the parallelism between the air shaft and the upstream guide roller meets the winding requirements after the winding mechanism is installed on the slitting machine, the parallelism of the air shaft needs to be adjusted after the winding mechanism is installed. Each slitting machine typically has dozens of winding mechanisms, each requiring individual adjustment, and the adjustment results are difficult to verify off-site; therefore, the installation and commissioning efficiency of the equipment is very low.

[0004] Furthermore, customers who purchase the equipment cannot perform independent adjustments and need the manufacturer to send specialists on business trips for equipment maintenance, resulting in excessively high time and personnel costs for maintenance. Utility Model Content

[0005] In view of the above situation, it is necessary to provide a dual-axis parallelism adjustment structure to solve at least one of the above problems, including a bearing seat, a shaft disposed on the bearing seat, and a second end of the shaft being assembled to the bearing seat via an attitude adjustment member; there is clearance between the attitude adjustment member and the bearing seat;

[0006] The second end is adjusted in attitude by the attitude adjustment component.

[0007] As a further embodiment of this utility model: the first end of the shaft is fixed by a bearing, and the adjustment range of the second end is a tapered region with the first end as the apex.

[0008] As a further embodiment of this utility model: the first end of the shaft is not fixed in posture, and the adjustment range of the second end is a conical region with the deflection center of the posture adjustment component as its vertex.

[0009] As a further embodiment of this utility model: the attitude adjustment component is a flange;

[0010] The flange portion and the bearing seat are pre-pressed and tightened by adjusting screws;

[0011] The flange is connected to the shaft via a bearing through the central through hole.

[0012] As a further embodiment of this utility model, a clearance is intentionally provided between the attitude adjustment component and the bearing seat.

[0013] As a further embodiment of this utility model, a shim may also be provided between the attitude adjustment component and the bearing seat.

[0014] The aforementioned dual-axis parallelism adjustment structure employs an attitude adjustment component mounted between the shaft and the bearing seat. This design offers advantages such as reduced overall equipment assembly difficulty and improved assembly efficiency. Specifically, it utilizes the clearance between the attitude adjustment component and the bearing seat, overcoming the previous technical bias of reducing tolerances to improve assembly precision. This represents a breakthrough in engineering concepts, going against traditional methods. By intentionally increasing the tolerance to create clearance, the shaft's attitude can be fine-tuned by tapping the attitude adjustment component under moderate preload, achieving rapid adjustment. Combined with calibration fixtures, offline and off-machine adjustments can be performed. After calibration, the shaft can be assembled into the equipment or production line, shortening the overall equipment assembly time and improving assembly efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the first type of shaft assembly provided by this utility model;

[0016] Figure 2 This is a schematic diagram of the second type of shaft assembly provided by this utility model;

[0017] Figure 3 This is an assembly diagram of the attitude adjustment component provided by this utility model;

[0018] Figure 4 This is a second assembly diagram of the attitude adjustment component provided by this utility model;

[0019] Figure 5 This is a schematic diagram of the winding mechanism of the slitting machine;

[0020] Figure 6 yes Figure 5 A schematic diagram showing the positional relationships of the various components.

[0021] Figure 7 This is a schematic diagram of the adjustment method under the first type of shaft assembly structure;

[0022] Figure 8 This is a schematic diagram of the adjustment method under the second type of shaft assembly structure;

[0023] Figure 9 This is a schematic diagram showing the deflection direction of the attitude adjustment component when adjusting adjacent adjustment screws. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0025] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "center," "longitudinal," "lateral," "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or posture relationships based on the orientation or posture relationships shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] This application provides a dual-axis parallelism adjustment structure, including a bearing seat 100, a shaft 200, and an attitude adjustment component 300. The second end 220 of the shaft 200 is assembled with the bearing seat 100 through the attitude adjustment component 300, and the axial attitude of one end of the shaft 200 is adjusted by the attitude adjustment component 300 so that the attitude of the shaft 200 meets the assembly requirements of the equipment.

[0028] The first end 210 of the shaft 200 is either a fixed end or a free end. This can be understood as both ends of the shaft 200 being assembled with the bearing seat 100, or only the second end 220 being assembled with the bearing seat 100.

[0029] like Figure 1As shown, when the first end 210 is a fixed end, the first end 210 and the bearing seat 100 are assembled via a bearing, and there is only relative rotation between the first end 210 and the bearing seat 100; there is no relative displacement between them. When the attitude of the second end 220 is adjusted by the attitude adjustment component 300, the axial adjustment range of the shaft 200 is a tapered region with the first end 210 as its apex (defined by the bearing clearance accuracy), such as... Figure 8 As shown by the dashed line.

[0030] like Figure 2 As shown, when the first end 210 is the movable end, only the second end 220 of the shaft 200 is assembled with the bearing 100. When the attitude of the second end 220 is adjusted by the attitude adjustment component 300, the axial adjustment range of the end of the shaft 200 is a tapered region with the deflection center of the attitude adjustment component 300 as its apex, such as... Figure 7 As shown by the dashed line.

[0031] Furthermore, the attitude adjustment component 300 is a flange, positioned between the second end 220 and the shaft seat 100, forming a holding relationship with the second end 220. An appropriate clearance is intentionally designed between the outer circumferential surface 320 of the attitude adjustment component 300 and the shaft seat 100 for assembly. Therefore, the attitude adjustment component 300 can be adjusted in its radial position (offset from the concentric position holding the shaft seat 100) by gently tapping 310 at any angle under moderate preload of the 100 locking screw. The circular flange design provides flexible selection of 360-degree tapping direction, further meeting the accuracy requirements of higher resolution calibration. Due to the holding relationship between the attitude adjustment component 300 and the second end 220, when the attitude adjustment component 300 adjusts its attitude, it can drive the second end 220 to move, thereby achieving attitude adjustment of the shaft 200. After completion, the fixing screws to 100 are locked. Thus, the "parallelism between two shafts" technical solution described in this application has been easily, efficiently, and quickly calibrated by the attitude adjustment component 300.

[0032] Specifically, such as Figure 3 As shown, the flange portion 310 of the attitude adjustment component 300 is assembled with the bearing seat 100 via an adjustment screw.

[0033] like Figures 3-4 As shown, further, after determining the posture of the second end 220, there will be a gap between the outer circumferential surface 320 of the posture adjustment component 300 and the bearing 100 at a certain point. To ensure the long-term stability of the adjustment result, a precision shim 400 of appropriate thickness is added into this gap to achieve the most perfect assembly. In any case, inserting the precision shim 400 into the gap is not a necessary technical means of the present invention, but only an auxiliary means to further consolidate the technical effect of the present invention.

[0034] The embodiments of this application, such as Figures 5-6As shown, the parallelism adjustment structure is applied between the take-up arm and the take-up bracket. In this embodiment, the connection between the take-up roller and the take-up arm is not adjustable. Therefore, in this embodiment, the take-up arm and the take-up roller are adjusted as a whole. Thus, the connecting pivot between the take-up arm and the take-up bracket is equivalent to shaft 200, and the take-up bracket is equivalent to bearing 100. At this time, both ends of shaft 200 are assembled with bearing 100, but only the second end 220 can be adjusted. This achieves indirect adjustment of the parallelism between the take-up roller and the upstream guide roller.

[0035] like Figure 6 As shown, A is the slide rail on the slitting equipment used to assemble the winding mechanism, B is the winding mechanism, C is the winding shaft of the winding mechanism, and D is the upstream roller of the winding mechanism. The equipment assembly requirements stipulate that C and D must remain relatively parallel.

[0036] During assembly, it is easy to keep A and B relatively perpendicular. However, after assembly, D, as the end part of the mechanism, will not meet the parallelism requirements between C and D due to the superposition of tolerances. Therefore, the attitude adjustment component 300 in this application can adjust the parallelism between the shaft 200 and the winding shaft before the winding mechanism is installed on the slide rail, that is, to eliminate the superposition of tolerances of the end parts, so as to realize the calibration before the winding mechanism is installed on the equipment.

[0037] In the above embodiments, the attitude adjustment component 300 is used to achieve rapid tolerance compensation. Combined with calibration fixtures, it can also achieve off-machine calibration of the slitting machine's winding device, greatly improving the equipment's assembly efficiency. Furthermore, the adjustment method is simple, and customers can handle it themselves, solving the pain point of traditional structures requiring engineers to be dispatched to the site for debugging.

[0038] The working principle of this utility model: According to conventional mechanical design principles, the smaller the assembly tolerance between the attitude adjustment component 300 and the bearing seat 100, the higher the precision. In this application, the tolerance between the two needs to be enlarged to achieve a certain range of concentricity offset of the attitude adjustment component 300 on the bearing seat 100.

[0039] As an auxiliary means to consolidate the technical effects of the present invention, refer to Figures 3-4 The outer circumferential surface 320 and the inner circumferential surface 110 of the bearing 100 are two surfaces in contact with each other. When the width of the shim 400 is smaller than these two surfaces, the outer circumferential surface 320 can be divided into a first surface 321 and a second surface 322, as shown below. Figure 3-4As shown, if the shim 400 is closer to the first surface 321, the second end 220 of the shaft 200 will be closer to the side where the shim 400 is located; if the shim 400 is closer to the second surface 322, the second end 220 will be farther away from the side where the shim 400 is located. It should be noted that the shim 400 can be positioned in any orientation on the circumference, therefore the angle adjustment range of the shaft 200 presents a conical region. Furthermore, if the shim 400 is placed at different 360-degree graduations on the outer circumferential surface 320, the orientation adjustment of the shaft 200 can achieve a finer adjustment resolution than changing the thickness of the shim 400. (Refer to...) Figure 9 If multiple shims 400 are set between the outer circumferential surface 320 and the bearing seat 100, the deflection angle of the shaft 200 can be further adjusted to meet the assembly requirements of the equipment.

[0040] In the actual assembly process, the angle that needs to be adjusted can be calibrated first. That is, the attitude adjustment component 300 is pre-pressed and assembled first, and then the 310 is manually tapped to make adjustments to determine the direction and degree of parallelism offset. The shim 400 can then be pushed into the corresponding attitude gap, and finally the assembly is confirmed to be tight.

[0041] What needs to be known is that Figure 3-6 To clearly illustrate the concept of adjustment range, the adjustment angle is enlarged. In actual working conditions, since it is used to compensate for tolerances, the deflection angle of the attitude adjustment component 300 will be very small.

[0042] Furthermore, in the embodiments of this application, the bearing's own clearance tolerance, assembled at the first end 210, is used in conjunction with the attitude adjustment component 300 to adjust the shaft's attitude. Specifically, taking an NSK6001 bearing with an inner diameter of 12mm as an example, its own inner diameter clearance ranges from 3 to 18 micrometers. The degree of change in the included angle between the inner and outer rings of the bearing can be calculated using trigonometric functions to be 0.0215° to 0.1290°. Since the shaft 200 and the bearing are assembled together, the deflectable angle of the shaft 200 is consistent with the deflectable angle of the bearing's inner ring. Given that the length of the shaft 200 is 55.4mm, the deflectable amount of the first end 210 of the shaft 200 can be calculated using trigonometric functions to be 0.020775mm to 0.12465mm. Therefore, by utilizing the bearing's own inner diameter clearance, the attitude adjustment of the shaft 200 is achieved, thereby achieving the purpose of offline adjustment of the dual-axis parallelism.

[0043] Specifically, it is important to understand that the technical solution provided in this application runs counter to traditional methods for improving assembly precision. In the field of mechanical design, improving assembly precision often requires increasing the machining precision of parts to reduce assembly tolerances and achieve overall precision improvement. This leads to increased difficulties for enterprises in supplier selection and processing costs due to higher precision requirements. In this application, we have designed and added a key attitude adjustment component 300, and deliberately enlarged the tolerance between the second end 220 of the attitude adjustment component 300 and the shaft seat 100, creating a certain clearance between them, thus enabling the second end 220 of the shaft to be positionally adjustable. Simultaneously, the attitude adjustment component uses a flange, whose protruding flange portion 310 from the shaft seat 100 provides a basis for tapping adjustment. Furthermore, the ingenious circular flange design provides flexible selection of 360-degree tapping directions, further meeting the precision requirements of higher resolution calibration.

[0044] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A dual-axis parallelism adjustment structure, comprising a bearing seat (100) and a shaft (200) disposed on the bearing seat (100), characterized in that: The second end (220) of the shaft (200) is assembled to the bearing seat (100) via an attitude adjustment component (300), and there is a clearance between the attitude adjustment component (300) and the bearing seat (100); the clearance is based on the tolerance between the attitude adjustment component (300) and the bearing seat (100); The second end (220) is adjusted in attitude by the attitude adjustment member (300).

2. The biaxial parallelism adjustment structure as described in claim 1, characterized in that: The first end (210) of the shaft (200) is fixed by a bearing, and the adjustment range of the second end (220) is a tapered region with the first end (210) as the apex.

3. The biaxial parallelism adjustment structure as described in claim 1, characterized in that: The first end (210) of the shaft (200) is not fixed, and the adjustment range of the second end (220) is a conical region with the deflection center of the attitude adjustment member (300) as the vertex.

4. The biaxial parallelism adjustment structure as described in any one of claims 1-3, characterized in that: The attitude adjustment component (300) is a flange; The flange portion (310) of the flange is fastened to the bearing seat (100) by adjusting screws; The flange is connected to the shaft (200) via a bearing through the central through hole.

5. The biaxial parallelism adjustment structure as described in claim 4, characterized in that: A shim (400) is provided between the attitude adjustment component (300) and the bearing seat (100).

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