CN210795385U

CN210795385U - Expansion mechanism and winding mechanism

Info

Publication number: CN210795385U
Application number: CN201921640126.XU
Authority: CN
Inventors: 周俊杰; 马港; 黄振奎
Original assignee: Guangdong Lyric Robot Automation Co Ltd
Current assignee: Guangdong Lyric Robot Automation Co Ltd
Priority date: 2019-09-27
Filing date: 2019-09-27
Publication date: 2020-06-19
Anticipated expiration: 2029-09-27

Abstract

The application provides tight mechanism and winding mechanism expand relates to the axle technical field that expands. The expansion mechanism comprises a shaft sleeve, an expansion shaft ejector block, a sliding bearing and a plurality of inclined blocks, wherein the expansion shaft ejector block is installed in the shaft sleeve through the sliding bearing, the inclined blocks are distributed around the expansion shaft ejector block and form inclined plane cooperation with the expansion shaft ejector block, and a through groove for the inclined blocks to pass through is formed in the shaft sleeve. The tight mechanism expands installs the axle kicking block that expands in the axle sleeve through adopting slide bearing, has avoided the sliding fit's between axle sleeve and the bloated axle kicking block necessity, and this just makes the bloated axle kicking block only need carry out sliding fit with slide bearing, and the machining precision of guarantee bloated axle kicking block can the standard component such as slide bearing, and tight mechanism that expands can normal use. The processing precision requirement and the assembly precision requirement of parts such as the shaft sleeve and the expanding shaft jacking block are greatly reduced. When will expand tight mechanism and use in the middle of the winding mechanism, can ensure the stable fixed to material book, be favorable to follow-up production.

Description

Expansion mechanism and winding mechanism

Technical Field

The application relates to the technical field of expansion shafts, in particular to an expansion mechanism and a winding mechanism.

Background

The inflatable shaft in the prior art is mainly of a pneumatic type, the inflatable shaft is often unstable in work due to influences of gas fluctuation and the like in the use process of the winding mechanism, and meanwhile, the inflatable shaft of the pneumatic type is often unstable in inward contraction and outward expansion control due to reasons of gas fluctuation and the like, so that the normal use of the winding mechanism is seriously influenced. Further, some mechanical inflatable shafts have been developed to improve the instability of use.

The existing mechanical air-expanding shaft can be expanded only by ensuring high-precision sliding fit between the shaft sleeve and the ejector block, and is difficult to process and assemble.

SUMMERY OF THE UTILITY MODEL

An object of this application is to provide a tight mechanism expands, and it can improve the too high problem of assembly required precision between axle sleeve and the kicking block.

Another object of the present application is to provide a winding mechanism comprising the above tensioning mechanism, which is also capable of improving the corresponding problems.

The embodiment of the application is realized as follows:

the embodiment of the application provides a tight mechanism expands, including axle sleeve, bloated axle kicking block, slide bearing and a plurality of sloping block, bloated axle kicking block passes through slide bearing install in the axle sleeve, a plurality of sloping blocks distribute in bloated axle kicking block around and with bloated axle kicking block forms the inclined plane cooperation, the confession has been seted up on the axle sleeve the logical groove that the sloping block passed.

The expansion mechanism adopts the sliding bearing to install the expansion shaft top block into the shaft sleeve, and the necessity of sliding fit between the shaft sleeve and the expansion shaft top block is avoided. This just makes the bloated axle kicking block only need carry out sliding fit with slide bearing, ensures the machining precision of bloated axle kicking block and can adapt such standard component of slide bearing, and bloated tight mechanism can normal use.

In addition, according to the expansion mechanism provided by the embodiment of the application, the following additional technical features can be provided:

in an alternative embodiment of the present application, the sliding bearing is an oilless bushing.

Oilless bush is the standard component, when processing bloated axle kicking block, as long as the precision that the guarantee bloated axle kicking block can the adaptation oilless bush, just can ensure to expand and realize sliding fit between axle kicking block and the oilless bush.

In an optional embodiment of the present application, one end of the expansion shaft top block is provided with a first sliding bearing, and the other end of the expansion shaft top block is provided with a second sliding bearing.

In an alternative embodiment of the present application, the expansion mechanism further includes an end cap, the end cap is mounted to one end of the shaft sleeve, and the first sliding bearing is fixed in the end cap.

In an alternative embodiment of the present application, the tensioning mechanism further comprises a resilient compression assembly for applying a radially inward compression force to the swash block.

The elastic pressing assembly applies a radially inward pressing force to the inclined block, so that the inclined block always has a resetting tendency, and the inclined block can retract into the shaft sleeve after the expansion shaft top block is removed from being pressed.

In an alternative embodiment of the present application, the elastic pressing assembly includes a pressing block and an elastic member, the pressing block is connected to the bushing, and the elastic member is pressed by the pressing block and the inclined block.

The elastic piece is pressed between the inclined block and the pressing block through the pressing block, the elastic piece can keep applying a reaction force to the inclined block, so that the reset of the inclined block is realized without sliding fit between the shaft sleeve and the expansion shaft jacking block, and the assembly precision between the shaft sleeve and the expansion shaft jacking block is not required to be as high as that required in the prior art.

In an alternative embodiment of the present application, the compression block is located outside the shaft sleeve and spans the through groove, and both ends of the compression block are detachably connected to the shaft sleeve by fasteners.

The assembly is carried out outside the shaft sleeve, so that the compression block can play a role, and is easy to assemble or disassemble and replace, and the difficulty of the assembly of the accessory of the compression block is lower than that of the assembly of the extrusion block of the existing mechanical air inflation shaft in the shaft sleeve.

In an optional embodiment of the present application, a groove is formed in an outer surface of the shaft sleeve, and the pressing block is accommodated in the groove, so that the pressing block does not protrude from an outer circumferential surface of the shaft sleeve.

An embodiment of the application provides a winding mechanism, which comprises a linear driving device, a unreeling shaft and the expansion mechanism of any one of the above items;

the unwinding shaft is connected with one end of the shaft sleeve, and an output shaft of the linear driving device penetrates through the unwinding shaft and is connected with the expansion shaft top block.

When the tight mechanism that will expand was used in the middle of the winding mechanism, only need to ensure sliding fit between bloated axle kicking block and the slide bearing, need not to require that there is sliding fit between axle sleeve and the bloated axle kicking block, and is corresponding, and the assembly precision requirement between axle sleeve and the bloated axle kicking block can be lower than prior art. Although the precision requirement during assembly is reduced, the stable fixation of the material roll can be still ensured, and the subsequent production is facilitated.

In the optional embodiment of this application, the one end of bloated axle kicking block is equipped with first slide bearing, the other end of bloated axle kicking block is equipped with second slide bearing, second slide bearing embedded in the inner bore wall of unreeling the axle.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a cross-sectional view of a tensioning mechanism and environmental elements provided in accordance with an embodiment of the present application;

FIG. 2 is a schematic view of a bushing provided in accordance with an embodiment of the present application;

FIG. 3 is a schematic view of an expansion shaft top block provided by an embodiment of the present application;

FIG. 4 is a schematic diagram illustrating a first perspective view of a swash block and an elastic pressing assembly according to an embodiment of the present application;

FIG. 5 is a schematic diagram illustrating a second perspective view of a swash block and an elastic pressing assembly according to an embodiment of the present application;

FIG. 6 is a schematic view of the expansion mechanism provided in an embodiment of the present application with the bushing and end cap removed;

FIG. 7 is a schematic view of an end cap and a first slide bearing provided by an embodiment of the present application;

fig. 8 is a schematic view of a second sliding bearing provided by an embodiment of the present application.

Icon: 100-a tensioning mechanism; 10-shaft sleeve; 11-a through slot; 12-a groove; 20-expanding the shaft jacking block; 21-shaft rod; 22-a top block; 31-a first sliding bearing; 32-a second sliding bearing; 40-oblique blocks; 50-end cap; 60-a compaction block; 70-an elastic member; 80-a nut; 200-unwinding the shaft; 300-pull rod.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

In the description of the present application, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the product conventionally places when used, and are only used for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the reference is made must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Examples

Referring to fig. 1 to 8, the embodiment provides an expanding mechanism 100, which includes a shaft sleeve 10, an expanding shaft top block 20, a sliding bearing, and a plurality of inclined blocks 40, wherein the expanding shaft top block 20 is installed in the shaft sleeve 10 through the sliding bearing, the plurality of inclined blocks 40 are distributed around the expanding shaft top block 20 and form an inclined plane fit with the expanding shaft top block 20, and a through groove 11 for the inclined blocks 40 to pass through is formed in the shaft sleeve 10.

When the expanding shaft top block 20 is pulled, the inclined block 40 can be enabled to protrude outwards from the through groove 11, and therefore the material roll is expanded. Because the expansion shaft top block 20 is installed in the shaft sleeve 10 through the sliding bearing, the sliding of the expansion shaft top block 20 can depend on the sliding bearing, the sliding fit between the expansion shaft top block and the shaft sleeve 10 is not needed, the common fitting precision between the expansion shaft top block and the inclined block 40 in the prior art is not needed, and the inclined block 40 can be expanded in the moving process of the expansion shaft top block 20 only through the sliding fit.

Specifically, the expansion shaft top block 20 is composed of a shaft 21 and a top block 22, and the two top blocks 22 are distributed along the axial direction of the shaft 21. The surface of the top block 22 is a slope, and correspondingly, the slope is also provided with another slope which is matched with the slope.

Specifically, in the present embodiment, the sliding bearing is an oilless bushing. Oilless bush is the standard component, when processing bloated axle kicking block 20, as long as guarantee bloated axle kicking block 20's precision can the oilless bush of adaptation, just can ensure to realize sliding fit between bloated axle kicking block 20 and the oilless bush. During processing, the high matching precision among the shaft expanding top block 20, the shaft sleeve 10 and the inclined block 40 is not required at the same time. The processing of the expanding shaft top block 20 is more convenient. And the defective rate during processing can be reduced to a certain extent, and the cost is reduced. For example, if the original slightly deficient finished product of the expansion shaft top block 20 needs to be in sliding fit with the shaft sleeve 10, the slightly deficient finished product cannot meet the assembly precision and needs to be scrapped or reprocessed. Through the improvement of the application, even if the finished product is deficient, the sliding bearing can be normally used as long as the sliding bearing can be in sliding fit with the finished product. This correspondingly reduces the production costs.

In detail, in the present embodiment, one end of the expansion shaft top block 20 is provided with a first sliding bearing 31, and the other end of the expansion shaft top block 20 is provided with a second sliding bearing 32. The expansion mechanism 100 further includes an end cap 50, the end cap 50 is mounted on one end of the shaft sleeve 10, and the first sliding bearing 31 is fixed in the end cap 50. The expansion mechanism 100 of the present application may be applied to a winding mechanism. The winding mechanism basic structure is identical to the winding device of the prior art, for example comprising the environmental elements shown in fig. 1: linear drive, unreeling shaft 200. The expansion mechanism 100 of the present application functions as an expansion shaft of a general winding apparatus. The unwinding shaft 200 is connected with one end of the shaft sleeve 10, and the output shaft of the linear driving device is inserted into the unwinding shaft 200 and connected with the shaft expansion top block 20. Accordingly, the second sliding bearing 32 of the expansion shaft top block 20 is embedded in the inner hole wall of the unwinding shaft 200. When the expansion mechanism 100 is applied to the winding mechanism, only sliding fit between the expansion shaft top block 20 and the sliding bearing needs to be guaranteed, sliding fit between the shaft sleeve 10 and the expansion shaft top block 20 does not need to be required, and correspondingly, the assembly precision requirement between the shaft sleeve 10 and the expansion shaft top block 20 is lower than that in the prior art. Although the precision requirement during assembly is reduced, the stable fixation of the material roll can be still ensured, and the subsequent production is facilitated.

The linear driving device may be a conventional telescopic cylinder such as an air cylinder, the pull rod 300 is configured as an output shaft, an external thread is processed at one end of the pull rod 300, an internal thread is processed at one end of the expansion shaft ejector block 20 and forms a thread fit with the pull rod 300, and it is considered that the nut 80 is sleeved on the pull rod 300 and then the pull rod 300 is screwed to be installed, so as to avoid thread slipping caused by excessive screwing between the expansion shaft ejector block 20 and the pull rod 300. The piston cylinder of the air cylinder is connected with the pull rod 300, and then the expansion shaft top block 20 can be further driven to move.

In addition to the solution adopted by the embodiment, in other embodiments, it is conceivable that, in the view of fig. 1, the left end of the sleeve 10 is extended to fit with the unreeling shaft 200, and the inner wall of the sleeve 10 corresponding to the upper and lower positions of the second sliding bearing 32 is increased in wall thickness to embed the second sliding bearing 32, and the design of the right end of the sleeve 10 is kept unchanged.

It is conceivable that the wall thickness of the inner wall at the right end of the sleeve 10 is increased in the view of fig. 1 to embed the first slide bearing 31, while the design of the left end of the sleeve 10 remains unchanged.

Referring to fig. 4 and 5, in particular, in the present embodiment, the expansion mechanism 100 further includes an elastic pressing component for applying a radially inward pressing force to the swash block 40, so that the swash block 40 has a tendency to return. Thus, after the expansion of the shaft top block 20 is released, the swash block 40 can be retracted into the shaft sleeve 10. The inclined blocks 40 of the present embodiment have three blocks, which are distributed in a central symmetry manner, and there are three sets of elastic pressing components correspondingly adopted.

In detail, the elastic pressing assembly includes a pressing block 60 and an elastic member 70, the pressing block 60 is connected with the shaft sleeve 10, and the elastic member 70 is pressed by the pressing block 60 and the inclined block 40. In this embodiment, the elastic member 70 is a spring. It is contemplated that other resilient members 70, such as spring blades, springs, etc., capable of providing a resilient force to the swash block 40 may be suitable for this embodiment to allow the swash block 40 to be reset. The elastic piece 70 is pressed by the pressing block 60, so that the elastic piece 70 is pressed between the inclined block 40 and the pressing block 60, the elastic piece 70 can keep applying a reaction force to the inclined block 40, the reset of the inclined block 40 is realized without the sliding fit between the shaft sleeve 10 and the expansion shaft top block 20, and the assembly precision between the shaft sleeve 10 and the expansion shaft top block 20 is not required to be as high as the existing requirement.

Referring to fig. 2, in detail, the pressing block 60 is located outside the shaft sleeve 10 and spans the through slot 11, and two ends of the pressing block 60 are detachably connected to the shaft sleeve 10 through fasteners. In this example, a common screw is used as the fastener. Because the assembly is carried out outside the shaft sleeve 10, the pressing block 60 can play the role of the shaft sleeve, and the assembly, the assembly or the disassembly and the replacement of the fitting part such as the pressing block 60 can be easier than the assembly of the extrusion block of the existing mechanical air inflation shaft in the shaft sleeve.

Further, a groove 12 is formed on the outer surface of the shaft sleeve 10, and the pressing block 60 is accommodated in the groove 12, so that the pressing block 60 does not protrude from the outer circumferential surface of the shaft sleeve 10. Therefore, when the material roll is taken and placed, the material roll is not influenced by the protrusion of the pressing block 60. Correspondingly, the material roll cannot scratch the pressing block 60, and the pressing block 60 is prevented from being damaged.

The principle of the embodiment is as follows:

when the expansion shaft top block 20 is pulled to move leftwards, the expansion shaft top block 20 presses the inclined block 40, the inclined block 40 moves towards the periphery of the shaft sleeve 10 along the through groove 11, and the spring is further pressed in the moving process by taking the view angle shown in figure 1 as a reference. At this time, the sloping block 40 of the expansion mechanism 100 can press against the hole wall of the central inner hole of the material roll, so that the relative position between the material roll and the expansion mechanism 100 is kept fixed.

When the material roll is to be discharged, the expansion shaft top block 20 is moved rightward, and the pressing of the inclined block 40 is released. The swash block 40 is pressed into the through groove 11 again by the restoring force of the spring. The sloping block 40 releases the compression of the hole wall of the central inner hole of the material roll. This enables the roll to be discharged.

Since the expansion shaft top block 20 of the present application is in sliding fit with the oilless bushing, it is not necessary to have sliding fit with the shaft sleeve 10 as in the conventional art. Therefore, during machining, only the dimensional accuracy of the expansion shaft top block 20 needs to be controlled to be matched with a standard part such as an oilless bushing, and then only the assembly accuracy between the expansion shaft top block 20 and the oilless bushing needs to be guaranteed during assembly. Therefore, the precise matching between the shaft sleeve 10 and the expansion shaft top block 20 is not needed, the requirement on the corresponding processing precision is reduced, and the production cost is reduced.

And after the requirement for installation accuracy is reduced, the assembly is more convenient, and the improvement of the production efficiency is promoted to a certain extent.

Although the processing precision and the assembly precision are reduced, the expanding mechanism 100 of the present application can still work normally and stably, and after the expanding mechanism is applied to a winding mechanism, stable fixation of a material roll during winding can be ensured.

To sum up, the tight mechanism 100 that expands of this application has been exempted from the sliding fit's between axle sleeve 10 and the bloated axle kicking block 20 necessity through adopting slide bearing to install bloated axle kicking block 20 in the axle sleeve 10, and this just makes bloated axle kicking block 20 only need carry out sliding fit with slide bearing, guarantees the machining precision ability adaptation standard component such as slide bearing of bloated axle kicking block 20, and tight mechanism 100 that expands can normal use. The processing precision requirement and the assembly precision requirement of parts such as the shaft sleeve 10 and the expanding shaft top block 20 are greatly reduced. When the expanding mechanism 100 is applied to the winding mechanism, the precision requirement during assembly is reduced, the stable fixation of the material roll can be still ensured, and the subsequent production is facilitated.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. The utility model provides a tight mechanism expands, its characterized in that, includes axle sleeve, bloated axle kicking block, slide bearing and a plurality of sloping block, bloated axle kicking block passes through slide bearing install in the axle sleeve, a plurality of sloping blocks distribute in around bloated axle kicking block and with bloated axle kicking block forms the inclined plane cooperation, set up the confession on the axle sleeve the logical groove that the sloping block passed.

2. The tightening mechanism according to claim 1, characterized in that the sliding bearing is an oilless bushing.

3. The tightening mechanism as claimed in claim 1, wherein one end of the expansion shoe is provided with a first sliding bearing, and the other end of the expansion shoe is provided with a second sliding bearing.

4. The tightening mechanism according to claim 3, further comprising an end cap mounted to an end of the bushing, the first sliding bearing being secured within the end cap.

5. The tightening mechanism of claim 1, further comprising a resilient compression assembly for applying a radially inward compressive force to the swash block.

6. The tightening mechanism of claim 5, wherein the resilient compression assembly comprises a compression block and a resilient member, the compression block is coupled to the bushing, and the resilient member is compressed by the compression block and the ramp.

7. The tightening mechanism of claim 6, wherein the compression block is located outside the bushing and spans the through slot, and wherein both ends of the compression block are detachably connected to the bushing by fasteners.

8. The tightening mechanism as claimed in claim 6, wherein a groove is provided on an outer surface of the sleeve, and the pressing block is received in the groove so that the pressing block does not protrude from an outer circumferential surface of the sleeve.

9. A winding mechanism comprising a linear drive, a pay-off spool and an expansion mechanism according to any one of claims 1 to 8;

10. The winding mechanism according to claim 9, wherein one end of the expansion shaft top block is provided with a first sliding bearing, and the other end of the expansion shaft top block is provided with a second sliding bearing, and the second sliding bearing is embedded in an inner hole wall of the unwinding shaft.