CN110449976B - Armor formula guard shield and lathe - Google Patents
Armor formula guard shield and lathe Download PDFInfo
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- CN110449976B CN110449976B CN201910882148.5A CN201910882148A CN110449976B CN 110449976 B CN110449976 B CN 110449976B CN 201910882148 A CN201910882148 A CN 201910882148A CN 110449976 B CN110449976 B CN 110449976B
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- 230000001681 protective effect Effects 0.000 claims abstract description 77
- 239000004744 fabric Substances 0.000 claims abstract description 26
- 238000005452 bending Methods 0.000 claims description 16
- 238000003780 insertion Methods 0.000 claims description 6
- 230000037431 insertion Effects 0.000 claims description 6
- 230000000452 restraining effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 21
- 230000008569 process Effects 0.000 abstract description 21
- 239000000463 material Substances 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 11
- 230000002035 prolonged effect Effects 0.000 abstract description 6
- 238000005299 abrasion Methods 0.000 abstract description 3
- 238000004078 waterproofing Methods 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 23
- 239000002184 metal Substances 0.000 description 14
- 238000007789 sealing Methods 0.000 description 8
- 230000009471 action Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/08—Protective coverings for parts of machine tools; Splash guards
- B23Q11/0825—Relatively slidable coverings, e.g. telescopic
Abstract
An armor type shield and a machine tool. According to the invention, waterproof fabrics are connected between the inner supports of the armor type protective cover, so that the waterproof fabrics cover the inner side of the armor type protective cover, and the elastic connecting device and the limiting belt between the inner supports of the armor type protective cover are sealed between the waterproof fabrics and scales. According to the elastic connecting device and the limiting belt, linkage between all levels of structures in the armor type protective cover can be achieved, meanwhile, the spacing between scales of the armor type protective cover can be automatically compressed, and first-level waterproof is achieved. According to the invention, only the waterproof fabric in the armor type protective cover is used for providing additional waterproofing, so that the waterproof effect is better, and the integral failure of the protective cover caused by any stage of waterproof failure can be avoided. The armor type protective cover disclosed by the invention transfers the acting force born by the flexible material to the elastic connecting device and the limiting belt in the stretching and compressing process, so that the pulling abrasion of the waterproof fabric can be effectively avoided, and the service life of the armor type protective cover is prolonged.
Description
Technical Field
The invention relates to the field of machine tool protection devices, in particular to an armor type shield and a machine tool.
Background
The armor formula guard shield is a protection device commonly used on the lathe, and it sets up on the extending structure of lathe, prevents that lathe processing waste material from getting into inside the lathe, also can avoid operating personnel direct and lathe extending structure contact and be injured.
The outer side of the armor type protective cover is provided with a plurality of stages of mutually sequentially overlapped scales, and the inner side of each scale is provided with a connecting device. The prior armor type protective cover, the connecting device comprises supporting plates for supporting and fixing each scale, and flexible materials such as woven belts, inner liners and the like connected between the supporting plates. The scale is arranged on the outer side of the supporting plate, and the inner side of the scale is connected into a whole by the supporting plate and the flexible material.
Because the whole body of the existing armor type protective cover is connected through flexible materials, the flexible materials are necessarily stressed in the stretching or shrinking process. The useful life and mechanical strength of the flexible material limit the useful life of existing armor shields and the mechanical strength that they can withstand. In particular, the scales of the armor type protective cover are usually made of metal materials, the supporting plates inside the armor type protective cover are usually made of PVC materials, and the external structural strength is obviously higher than that of the internal connecting device, so that the internal connecting device is easily worn in the process of external scale movement, the service life of the protective cover is further shortened, and the protective effect of the protective cover is limited.
Existing armor shields are only waterproof through a single layer of flexible material. Once the layer of flexible material is broken, the armor-type shield will be in a water leak condition.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the armor type shield and the machine tool, and the inner support of the armor type shield can be connected by utilizing the elastic connecting device, so that the pushing force or the pulling force for helping the inner support to restore the initial distance is provided, the integral stability of the inner support is ensured, and the service life of the armor type shield is prolonged. The invention adopts the following technical scheme.
First, to achieve the above object, there is provided an armor type shield comprising: flakes of water; the internal brackets are respectively arranged on the inner sides of each flake; and the waterproof fabric is connected between the inner brackets and covers the inner side of the armor type protective cover.
Optionally, the armor type protecting cover further comprises an elastic connecting device, wherein the elastic connecting device is connected between two adjacent internal brackets and stretches or compresses in linkage with the scales and the internal brackets; the inner support and the elastic connecting device are located between the scales and the waterproof fabric.
Optionally, the armor type shield, wherein the elastic connection device includes: one end of the first connecting piece is provided with a first connecting structure, and the other end of the first connecting piece is connected with the side wall of the inner bracket of the armor type shield; one end of the second connecting piece is provided with a second connecting structure, and the other end of the second connecting piece is connected with the side wall of the other adjacent internal bracket of the armor type shield; the second connecting structure is fixedly connected with the first connecting structure.
Optionally, the armor type protecting cover, wherein the first connecting structure is a plugging groove, and the second connecting structure is a protrusion matching with the plugging groove in size; the insertion groove is parallel to the end edge of the first connector; the protrusion protrudes out of the end edge of the second connecting piece and is parallel to the inserting groove.
Optionally, in the armor-type shield, a distance between an end part of the first connecting piece far away from the first connecting structure and an end part of the second connecting piece far away from the second connecting structure at least reaches a distance between two adjacent internal brackets in the tensile state of the armor-type shield.
Optionally, the armor type shield, wherein a fixing piece is further disposed near the first connection structure and the second connection structure, and the fixing piece limits relative rotation between the first connection piece and the second connection piece.
Optionally, the armor type shield is characterized in that a limiting belt is further connected between the inner brackets on the inner sides of the scales, the limiting belt is installed between the inner brackets of the armor type shield and is fixed close to the side wall of the inner brackets, and the limiting belt is connected with the inner side end parts of the inner brackets and the outer side end parts of the adjacent inner brackets.
Optionally, in the armor type protecting cover, the limiting bands are sequentially connected from the inner side of the inner support connected with each layer of scales to the outer side of the inner support of one layer of scales from inside to outside.
Optionally, in the armor-type protecting cover, the limiting band is stretched along with the armor-type protecting cover to be gradually straightened, the inner side of the inner support of the scale is pulled outwards in an inclined mode, the outer side of the inner support of the scale is pulled inwards in an inclined mode, the scale connected with the inner support is driven to turn inwards, and the inner wall of the scale is tightly attached to or abutted against the outer surface of one layer of scale in the scale.
Meanwhile, the invention also provides a machine tool which comprises the armor type protective cover.
Advantageous effects
According to the invention, waterproof fabrics are connected between the inner supports of the armor type protective cover, so that the waterproof fabrics cover the inner side of the armor type protective cover, and the elastic connecting device and the limiting belt between the inner supports of the armor type protective cover are sealed between the waterproof fabrics and scales. According to the elastic connecting device and the limiting belt, linkage between all levels of structures in the armor type protective cover can be achieved, meanwhile, the spacing between scales of the armor type protective cover can be automatically compressed, and first-level waterproof is achieved. According to the invention, only the waterproof fabric in the armor type protective cover is used for providing additional waterproofing, so that the waterproof effect is better, and the integral failure of the protective cover caused by any stage of waterproof failure can be avoided. The armor type protective cover transfers the acting force born by the flexible material to the elastic connecting device and the limiting belt in the stretching and compressing process, can effectively avoid the traction and abrasion of the waterproof fabric, and prolongs the service life of the armor type protective cover
The elastic connecting device is arranged between each level of the inner support of the armor type protective cover and is abutted between two adjacent side walls of the inner support of the armor type protective cover, acting force for maintaining initial spacing between each level of the inner support of the armor type protective cover is provided, and linkage between each level of structures in the armor type protective cover is achieved. Therefore, the invention transfers the acting force born by the flexible material to the elastic connecting device in the stretching and compressing process of the armor type protective cover, and the elastic connecting device has higher mechanical strength and larger stress bearing range, so that the wear of the waterproof fabric can be effectively avoided, and more durable and more sufficient waterproof can be realized.
Furthermore, the two connecting pieces of the elastic connecting device are respectively fixed and formed by adopting elastic metal sheets in a plugging manner. The splicing structure is symmetrical with the long axis of the integral elastic connecting device, and the connecting part between two connecting pieces can be ensured to be stressed uniformly. The fixing piece is matched and arranged between the splicing structure and the bending of the connecting piece, and the connecting parts of the two connecting pieces are mutually overlapped and mutually abutted without relative rotation, so that the problem of unstable connection caused by uneven stress on one side of any connecting piece can be effectively avoided, and the stress failure of the elastic connecting device in the stretching or compressing process of the armor type protective cover is avoided.
Meanwhile, the plug-in structure adopted by the invention can realize self-locking between the two connecting pieces. The distance between two adjacent side walls in the inner support of the armor type protective cover is smaller than the distance between the far ends, deviating from each other, of the connecting pieces, the two connecting pieces are abutted by the side walls of the inner support to be tightly attached to each other, and therefore the connecting point between the two connecting pieces is not stressed all the time in the whole stretching or compressing process of the armor type protective cover. Therefore, the internal support, in particular the elastic connecting device arranged between the internal support and the elastic connecting device, maintains the allowance of deformation in the whole stretching or shrinking process of the armor type protective cover, and is rarely stressed in the whole stretching or compressing process, so that the service life of the internal support can be further prolonged.
According to the invention, the strength of the scales of the armor type shield is lower than that of the inner support, and the strength of the inner support is lower than that of the elastic connecting device arranged between the inner support and the inner support, so that the scales outside each stage can be drawn inwards through the structure inside the armor type shield, so that the scales at each stage are mutually attached more tightly, the sealing of the outer part of the shield is realized, and the scales are prevented from being mutually hit in the moving process. Meanwhile, the limiting belt is connected with the internal support of each scale in a Z-shaped mode, and is stretched along with the armor type protective cover to be gradually straightened. Therefore, the inner sides of the inner brackets of the scales can be pulled outwards by the limiting belts connected between the scales at all levels in an inclined way, the scales connected with the inner brackets are driven to turn inwards, and the inner walls of the scales are tightly attached to or abutted against the outer surfaces of one layer of scales in the inner brackets. Therefore, the invention can apply inward overturning pulling force to each layer of scales in the armor type protective cover, effectively prevent the scales from overturning outwards, ensure that each layer of scales are tightly attached, and realize better sealing effect. The invention can reduce the noise generated by striking between scales and the shake of the intermediate structure, so that the whole structure of the armor type shield is more stable, and the service life of the armor type shield is prolonged.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, and do not limit the invention. In the drawings:
FIG. 1 is a schematic view of the assembly process of the elastic connection device for armor type shields of the present invention;
FIG. 2 is a schematic view of the internal structure of an armor-type shield incorporating elastic attachment means in accordance with the present invention;
FIG. 3 is a side view of the armor-type shield of the present invention;
FIG. 4 is a perspective view of an armor-type shield of the present invention;
FIG. 5 is a schematic view of a machine tool with an armor-type shield of the present invention mounted thereon;
FIG. 6 is a schematic view of the armor-type shield of the present invention mounted on a machine tool;
FIG. 7 is a side view of the armor-type shield of the present invention mounted on a machine tool;
FIG. 8 is a schematic illustration of the connection between spacing bands and scales in the armor shield of the present invention;
FIG. 9 is a schematic view of another implementation of the armor shroud of the present invention;
fig. 10 is a schematic view of the addition of waterproof fabric in another implementation of the armor shield of the present invention.
In the drawings, 1 denotes a first connection member; 11 denotes a first connection structure; 12 denotes a first stent attachment point; 13 denotes a first fastener attachment point; 2 represents a second connection; 21 represents a second connection structure; 22 denotes a second stent attachment point; 23 denotes a second fastener attachment point; 3 represents a fixing member; 4 represents scales; 41 denotes an internal stent; 42 denotes a screw; 43 denotes a tablet; 51 denotes a card slot; 52 denotes a wear block; 53 denotes a pulley; 6 represents a machine tool; 61 denotes a lower rail; 62 denotes an upper sheet metal baffle; 63 represents an upper sheet metal auxiliary rail; 64 denotes a lower sheet metal baffle; 65 denotes sheet metal of the machine tool housing; 7, a machine casting; 8 denotes a slider; 9 represents a limit belt; 91 a spacing strap mount; 10 represents a waterproof fabric; 11 denotes a flange.
Detailed Description
In order to make the purpose and technical solutions of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present invention fall within the protection scope of the present invention.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The meaning of "and/or" in the present invention means that each exists alone or both exist.
The meaning of the inner and outer in the invention is that the direction from the scales to the elastic connecting device between the inner brackets is inner relative to the armor type protective cover, and the opposite is outer; and not to a particular limitation of the mechanism of the device of the present invention.
The meaning of the term "front and rear" in the present invention means that, with respect to the elastic connection device itself, the direction approaching the connection structure is front and the direction approaching the connection point of the bracket is rear; and not to a particular limitation of the mechanism of the device of the present invention.
"Connected" as used herein means either a direct connection between components or an indirect connection between components via other components.
The armor formula guard shield is mainly used to cover at the extending structure surface of lathe, provides the protection. The conventional armor type shield comprises scales arranged outside, a supporting plate arranged inside perpendicular to the scales, and a flexible material connected with the supporting plates corresponding to the scales at each level. The support plates or scales of the armor type shield are pulled or pushed by the telescopic structure of the machine tool, in the process, the flexible material is matched with corresponding bending or stretching of the support plates at all levels, the expansion and the contraction are realized, the limitation of the movable travel range between the scales is realized, and the excessive stretching between the scales is avoided to loosen or expose the internal structure of the shield. However, the flexible material has insufficient mechanical strength and is easy to break at the bending part so as to cause the whole shield structure to fail.
In order to prolong the service life of the shield, the invention provides a brand new armor type shield which replaces the structure.
Referring to fig. 2, the armor type shield provided by the invention is provided with an inner bracket 41 attached to the side wall of each stage of scales 4 which are bent inwards. Or the inner bracket can be bent inwards from the inner side of the scale to form a support for the scale. The inner support may be selected from a metal material, and it is generally preferable to select a metal sheet having a higher strength and a greater thickness than the scale 4, for example, a stainless steel sheet. The side walls of the inner brackets 41 of the adjacent two-stage scales 4 can be connected by elastic connecting devices with elasticity to realize linkage.
Referring to fig. 1, in one implementation, the elastic connection device includes:
a first connecting piece 1, one end of which is provided with a first connecting structure 11, and the other end of which is connected with the side wall of the inner bracket of the armor type shield;
a second connecting member 2, one end of which is provided with a second connecting structure 21, and the other end of which is connected to the side wall of another adjacent inner bracket of the armor-type shield;
the second connection structure 21 is fixedly connected with the first connection structure 11.
In the above elastic connection device, in the connection state of the first connection member and the second connection member, the first connection member 1 and the second connection member 2 are used for connecting the ends of the inner support 41 of the armor-type shield, which are away from each other. The initial distance between the two ends of the elastic connecting device is set to exceed the stretching limit distance between the two adjacent stages of scales 4 inside the armor type protective cover under the condition that the elastic connecting device is not subjected to external force, so that elastic driving force for restoring the initial distance of the inner support can be provided for the inner support.
When the elastic connecting device is installed between the inner brackets 41 of the armor-type protective cover, the far ends of the first connecting piece and the second connecting piece, which are away from each other, are respectively provided with screw holes shown in fig. 1 as a first bracket connecting point 12 and a second bracket connecting point 22, and the first bracket connecting point 12 and the second bracket connecting point 22 are respectively fixed between the side walls of the inner brackets 41 connected with the adjacent two-stage scales 4 inside the armor-type protective cover in a mode of bolts, clamping pieces, puncture structures and the like. Because the distance between the internal brackets is smaller than the initial distance of the elastic connecting device, the far ends of the first connecting piece and the second connecting piece, which are mutually away from each other, are respectively abutted against the side walls of the adjacent internal brackets, and the acting force for maintaining the initial state is provided for the internal brackets and the scales connected with the internal brackets.
To avoid failure of the first and second bracket attachment points, a pressing piece 43 may be provided between the screw 42 and the first bracket attachment point 12 and/or the second bracket attachment point 22, respectively. The screw 42 presses the pressing piece 43, and the pressing piece evenly applies the abutting force to the two first bracket connecting points 12 and the two second bracket connecting points 22 at the distal ends of the first connecting piece 1 and the second connecting piece 2 from the pressing piece plane, so that the pressing piece is stably and reliably fixed on the side wall of the inner bracket.
Therefore, the elastic connecting devices can be stably assembled between the inner supports 41 of the scales 4 of each level of the armor type protective cover respectively, and linkage of each level of the inner supports is realized. Under the action of the elastic connecting device, the armor type protective cover is driven by the telescopic structure of the machine tool to compress or stretch the distance between scales. At this time, the relative displacement between the scales 4 of each stage drives the inner frame 41 at the bending side thereof to compress or stretch each elastic connection device connected between the inner frames. Since the elastic connection means is already in a slightly compressed state in the initial assembled state, the further compression or stretching between the scales does not exceed the stress range that it can withstand. The elastic connecting device is elastically deformed under the action of the internal brackets, and transmits strain force to the front and rear internal brackets, so that the internal brackets are driven to have potential energy for recovering the initial state. Once the driving force of the machine tool telescopic structure is released, all levels of scales in the armor type protective cover can be driven by the elastic connecting device in the armor type protective cover to be in linkage and restored to the initial state.
Compared with the passive stress of the existing flexible material, the elastic connecting device can actively drive all levels of scales of the armor type shield to synchronously link. Because the mechanical strength and the thickness of the integral metal spring plate of the elastic connecting device are both larger than those of the inner bracket connected with the elastic connecting device and are larger than those of the outer scales, the inner strong and outer weak structures are formed, and the inner connecting system of the armor type protective cover cannot fail due to the abrasion of the scales. Therefore, the invention can effectively ensure that the whole structure of the shield is complete and is not easy to fail and break, and further prolongs the service life of the whole shield structure.
Referring to fig. 2, in the above elastic connection device, the first connection structure 11 may be configured as a socket, and the second connection structure 21 may be correspondingly configured as a protrusion matching the size of the socket. The two are spliced to realize self-locking, and the installation is convenient.
Considering the stress condition between the inverted connection structures, the inserting grooves can be further arranged parallel to the end edges of the first connecting piece 1; the protrusion is arranged to protrude from the end edge of the second connector 2, parallel to the insertion groove. So as to avoid the connection loss caused by the mutual separation of the structures due to the relative rotation of the plug-in structures.
In a more specific implementation manner, the insertion groove is arranged at the middle position of the end part of the first connecting piece 1, the protrusion protrudes from the middle position of the edge of the end part of the second connecting piece 2, and both the insertion groove and the protrusion are in a form of being symmetrical to the long axis of the integral elastic connecting device. Therefore, the instability caused by single-side plugging can be further avoided, and the two plugging structures are prevented from being separated from failure due to relative rotation at the single-side plugging position. Under the state that the bulge is inserted into the inserting groove, the front end of the first connecting piece 1 and the front end of the second connecting piece 2 are overlapped and mutually abutted, and the rear ends of the first connecting piece are mutually far away and respectively abutted and fixed on two adjacent side walls in the inner support of the armor type protective cover, so that linkage between all levels of the inner support is realized.
In order to ensure that the elastic connection device has enough elasticity to support the automatic recovery of the stages of the internal support to the original spacing, in one implementation manner, the invention further provides a bending away from the second connection piece 2 at a position close to the inserting groove in the first connection piece 1; a bend is provided in the second connecting piece 2 near the projection away from the first connecting piece 1. The connecting pieces at the back ends of the bending are mutually deviated, and the connecting pieces at the front ends of the bending are mutually abutted and spliced. The bending part is used as a fulcrum. When the armor type protective cover stretches to two sides, the distance between the connecting pieces at the bent rear ends is increased, but the stretching limit size of the protective cover can not reach the initial distance between the two ends under the action of external force, so that the two connecting pieces still keep in a compressed state. In the state that the two connecting pieces are compressed, the bending part is used as a fulcrum, and the front end of the first connecting piece 1 and the front end of the second connecting piece 2 are always overlapped and mutually abutted due to the action of the bending angle and the fixing action of the bending front end splicing structure on the end parts of the two connecting pieces. The plug-in structure is not affected by external force applied by the shield structure in the whole compression or stretching process of the armor type shield. That is, the attachment points 13, 23 between the two connectors of the present invention are not stressed all the way through stretching or compression of the armor-type shield. Therefore, the internal support, in particular the elastic connecting device arranged between the internal support and the elastic connecting device, maintains the allowance of deformation in the whole stretching or shrinking process of the armor type protective cover, and is rarely stressed in the whole stretching or compressing process, so that the service life of the internal support can be further prolonged.
However, in a preferred manner, in order to avoid that the elastic connection device is stable due to the loose of the plugging structure caused by the relative rotation of the fixing element connection points 13 and 23 between the two connection elements, the invention may further provide a fixing element 3 between the first connection structure 11 and the bend and between the second connection structure 21 and the bend, and the fixing element 3 is used to connect the front ends of the two connection elements, so as to limit the relative rotation between the first connection element 1 and the second connection element 2, thereby ensuring that the plugging structure cannot be loose due to rotation, and ensuring that the acting force of the elastic connection device on the internal support cannot be invalid.
In a simpler implementation manner, the fixing member 3 may be provided in the form of two or more screws, buckles, puncture structures, etc. arranged parallel to the insertion groove. It is only responsible for connecting two connecting pieces, avoids relative rotation between the connecting pieces, and does not need to bear the extrusion or stretching force of the whole armor type shield stretching process. Therefore, the connecting piece structure adopted by the invention can also effectively protect the fixing piece 3 and avoid the loosening failure caused by the stress.
Further, referring to fig. 3 and 4, the elastic connection devices are symmetrically arranged at both ends of each pair of adjacent inner brackets in the armor type shield along a straight line perpendicular to the scales, respectively. With particular reference to fig. 3, the bracket attachment points 12, 22 of each elastic attachment device are all set at equal distances from the respective inner bracket ends. Like this, outside scale overlap joint each other end to end, and its inside elastic connection device aligns along the broken line of fig. 3, because elastic connection device mechanical strength is higher than outside scale, the scale can be because inside elastic connection device and by slight inwards pulling deformation for more inseparable laminating between the scale at every stage realizes the seal between the scale, forms first level waterproof construction through the scale of mutual inseparable butt. Therefore, in the stretching or shrinking moving process, scales on the surface of the armor type protective cover provided by the invention can be pulled by the internal support and the elastic connecting device all the time to be approximately in a straight line arrangement, scales are tightly attached to each other, all levels are linked, friction between scales only exists in the moving process along the moving direction, the surface attaching degree is high, and the armor type protective cover has a preliminary waterproof effect. Therefore, the invention can solve the problem that scales of the armor type protective cover connected by the existing flexible material are mutually flapped and tilted.
In order to ensure that each level of scales of the armor type shield moves along a straight line, the invention can further refer to the mode shown in fig. 4 and 7, wherein a wear-resistant block 52 and/or a pulley 53 are arranged at the end part of the inner bracket, or a clamping groove 51 is further formed between the wear-resistant block 52 and/or the pulley 53 and the scales.
The grinding block 52 and/or the pulley 53 move along a guide device of a machine tool provided with the armor type shield, stretching the armor type shield or compressing the armor type shield. The clamping groove 51 can be used for further guiding the clamping of the guiding structure to prevent the armor type shield from bending in the compression process.
In one implementation, the armor shroud of the present invention may be provided on the machine tool 6 structure shown in fig. 5 in the manner shown in fig. 6. The clamping groove 51 is clamped with a sheet metal structure at the side part of the guiding device of the machine tool, the machine tool is guided and sealed by the armor type protective cover, and the wear-resisting block 52 and/or the pulley 53 move along the guiding device of the telescopic structure of the machine tool so as to ensure that the armor type protective cover is stretched or compressed in a straight line all the time, and cannot generate lateral inclined acting force on the internal structure, and ensure that the internal structure is stable and does not rotate relatively.
Taking the structure shown in fig. 4 and5 as an example, the upper end and the lower end of each stage of internal support of the armor type shield are respectively provided with a wear-resistant sliding block 52 and a pulley 53 at intervals, and an equal gap is reserved between the two and the inner side surface of the scale to form a clamping groove 51. The armour type cover is mounted on a machine tool 6 shown in fig. 5. The wear-resistant block 52 and/or the pulley 53 at the lower end are/is abutted against the upper end face of the lower rail 61, the clamping groove 51 at the lower end is clamped against the upper end face of the lower sheet metal baffle plate 64 arranged on the outer side of the lower rail 61 and parallel to the scales, the wear-resistant block 52 and/or the pulley 53 at the upper end are/is abutted against the upper end face of the inner wall of the upper sheet metal auxiliary rail 63, the upper end of the scales is blocked and sealed by the outer upper sheet metal baffle plate 62, and the clamping groove 51 at the upper end is clamped against the lower end face of the machine tool shell sheet metal 65 extending downwards between the upper sheet metal auxiliary rail 63 and the upper sheet metal baffle plate 62. Thus, the whole armor type shield can be pushed by the machine casting 7 to move synchronously with the sliding blocks 8 arranged on the lower rail 61, and can stretch or compress along the left-right direction of the drawing along the lower rail 61, so that the sealing of the internal structure of the machine tool is realized.
On the basis, in order to be conveniently installed on a machine tool 6 shown in fig. 5, the inner brackets corresponding to the outermost and innermost scales in the armor type protective cover are respectively connected with flanges shown in fig. 9 or 10. The machine tool telescoping structure drives the movable end flange 11 while the fixed end flange 32 is fixed to the fixed structure of the machine tool and remains stationary. Therefore, the armor type protective cover disclosed by the invention stretches or compresses correspondingly along with the movement of the telescopic structure of the machine tool along the track direction of the telescopic structure synchronously, and limits on scales are provided in the stretching process, so that the scales are prevented from turning outwards. The inside of the armor type shield is also provided with a limit belt for connecting all levels of scales. In order to fix the two ends of the limiting belt 9, the flanges 11 may be further provided with pressing pieces, the pressing pieces 4 abut against the side wall surfaces of the flanges 11, and the two ends of the limiting belt 9 are respectively limited therebetween to fix the limiting belt 9.
The pressing piece 4 can be correspondingly fixed on the inner bracket or the flange 11 through screws. The screws simultaneously penetrate the inner bracket, the pressing piece, the flange structure between the pressing pieces and the limiting belt 9, so that the inner bracket, the pressing piece and the flange structure are connected into a whole.
The machine tool has a complex structure, and some telescopic structures need to provide protection from multiple directions, so that the middle of the scale is also provided with a plurality of bends along the telescopic direction according to the requirement of the telescopic structure in a similar way to that of fig. 9. In order to ensure synchronous operation among the bending structures, the invention can be further provided with one or more limit belts 9 at each bending part of each scale along the direction parallel to the movement of the scale. Each limit belt 9 stretches along the stretching direction or the compression direction of the armor type protective cover, each part of each level of scales and each longer scale can be synchronously linked, and each scale integrally stretches or contracts along the uniform direction, so that the internal structure of the armor type protective cover is further stabilized.
The limiting belt 9 refers to a structure between scales of the armor type protective cover and waterproof fabric shown in fig. 8. The outside of the limit belt is sequentially overlapped by a plurality of layers of scales 4 to form the protection of the telescopic structure in the machine tool. The end of each scale may be provided to be bent inwardly, or an internal bracket extending inwardly perpendicularly to the inner wall surface of the scale may be attached. The bent inner side of the inner support or scale forms the inner support 41. The limiting belts 9 are arranged on the inner brackets, are arranged between the inner brackets of the armor type protective cover and are fixed close to the side walls of the inner brackets, the limiting belts are connected with the inner side end parts of the inner brackets and the outer side end parts of the adjacent inner brackets and are connected with the scales 4 of the armor type protective cover in a Z-shaped manner, and the scales 4 of the armor type protective cover are pulled inwards to prevent the scales from turning outwards.
In the connection mode shown in fig. 8, the scale on the right side of fig. 8 is arranged at the innermost side of the outer surface of the integral armor type protective cover, the left side of the scale is provided with an inner bracket which is perpendicular to the inner surface of the scale and is bent inwards to be close to 90 degrees, and the left side of the outer surface of the scale is lapped with another layer of scale. The scales are arranged in the same direction and are sequentially overlapped outside the outer surfaces of the scales on the right sides. The scales are equal or at least close to each other in interval, all levels of scales are parallel to each other, and the scales are drawn close to each other or far away from each other for stretching due to the movement of the telescopic structure in the random bed 6. Wherein, the limit belt 9 connects the inner side and the outer side of the internal support 41 of each scale, and forms a Z-shaped connection between each scale to limit each scale from turning outwards.
In fig. 8, the right scale is disposed at the innermost side of the armor-type shield, and the left scale is at the outermost side. In order to reduce the gaps among the scales in the armor type protective cover as far as possible to realize waterproof sealing, the limiting belt 9 is sequentially formed from the inner side of the inner support 41 of each layer of scales to the outer side of the inner support 41 of one layer of scales according to the sequence from inside to outside of the scales, and then is connected from the inner side of the inner support 41 of the one layer of scales to the outer side of the inner support 41 of the other layer of scales, so that the limiting belt is reciprocated to limit the scales. Therefore, in the process that the armor type protective cover is gradually stretched to the limit position by the machine tool, the limit belt 9 is gradually straightened along with the stretching of the armor type protective cover, the inner side of the inner support 41 of the scale is pulled outwards in an inclined mode, the scale 4 connected with the inner support 41 is driven to turn inwards, and the inner wall of the scale is tightly attached to or abutted against the outer surface of one layer of scale in the inner support.
Taking one scale as an example, the pulling force of the scale is analyzed in the mode of fig. 8. The inner side of the corresponding inner bracket 41 of the limiting belt 9 connected with any one layer of scales in the middle generates an inclined outward traction force F1 through the traction of the outer layer of scales, and the outer side of the corresponding inner bracket 41 generates an inclined inward traction force F2 through the traction of the inner layer of scales. Both pulling forces have an inward component which acts on the scale 4 such that the outer side of the scale 4 tends to rotate inwards. When the scale rotates inward, the inner wall surface of the scale is limited by abutting against the outer wall surface of one layer of scale. At this time, adjacent scales are slightly deformed due to the connection of the limit belts 9, and the outer parts of the adjacent scales are mutually pressed, so that shaking between the scales can be limited, the scales are limited to outwards overturn, and noise generated by mutually beating the scales is effectively reduced. The scales are tightly attached, so that the waterproof sealing device has good sealing effect, the first-stage waterproof effect is reinforced, and the sealing waterproof effect can be improved along with the increase of the stretching degree of the scales.
In order to realize the assembly of the above-mentioned limit bands 9, the internal brackets 41 of each of the scales may also be provided with a limit band fixing structure, respectively. The fixing structure can be provided as a through hole through which the limit band 9 passes. The limiting belt 9 passes through the through hole and can be attached to the side wall of the inner bracket, the limiting belt 9 is stretched from the outer side of the inner bracket 41 close to the scale to the inner side of the inner bracket 41, so that the limiting belt 9 on each layer of scale is connected to the inner side of the inner bracket 41 of the adjacent inner layer of scale from the outer side of the inner bracket 41 close to the scale, and is connected to the outer side of the inner bracket 41 of the adjacent outer layer of scale from the inner side of the inner bracket 41 far away from the scale.
In other implementations, the assembly of the spacing band 9 can also be achieved by a spacing band fixture 91 as shown in fig. 8. The fixing piece 91 may be in the form of a patch or a tablet, and is attached to and abutted against the inner support 41, so that the limiting belt 9 is attached to the side wall of the inner support 41 and is pressed and fixed in the width direction. Because of the abutment restriction of the inner side and the outer side of the limiting belt fixing piece 91, the limiting belt 9 is connected to the inner side of the inner bracket 41 of the inner layer of scales from the outer side of the limiting belt fixing piece 91, and is connected to the outer side of the inner bracket 41 of the outer layer of scales from the inner side of the limiting belt fixing piece 91, so that a Z-shaped connection is formed, an inward overturning pulling force is provided for the scales, and the connection between the scales is stabilized.
In addition to the sealing waterproof effect of the structure, the inner side of the inner support is connected with waterproof fabric, so that the inner side of the armor type protective cover is covered by the waterproof fabric. Therefore, the water leakage problem caused by gaps formed in the external scale moving process can be avoided. The waterproof fabric seals the elastic connection structure between the internal support and the support outside the waterproof fabric in the scales, the internal structure of the protective cover is smooth, the interference to the internal structure of the machine tool can be reduced, and better waterproof performance is provided.
According to the invention, through the self-locking type plug-in structure, the structure is used for connecting the connecting pieces with enough elasticity, so that the connection and linkage of the internal support of the scale are realized. The connecting and linkage structure is ingenious in design, the internal structure can be avoided in the whole range of the telescopic movement of the armor type protective cover, particularly the waterproof fabric is directly driven by the telescopic structure of the machine tool to be stressed and damaged, the service life of the armor type protective cover can be effectively prolonged, and the waterproof effect of the armor type protective cover is protected. The internal structure is assembled only through bolts, screws or inserting modes, and the assembly and disassembly are simple and easy to maintain. Through the waterproof fabric inside, the waterproof fabric can achieve better waterproof effect and prolong the service life of the waterproof fabric by virtue of a special internal linkage mode.
The foregoing is a description of embodiments of the invention, which are specific and detailed, but are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention.
Claims (5)
1. An armor-type shield comprising:
Flakes (4);
An inner bracket (41) which is respectively arranged at the inner side of each flake (4);
A waterproof fabric (10) connected between the inner brackets (41) and covering the inner side of the armor type shield; elastic connection means connected between two adjacent internal brackets (41) and stretching or compressing in linkage with the scales and the internal brackets; wherein the inner bracket (41) and the elastic connecting device are positioned between the scales (4) and the waterproof fabric (10);
The elastic connection device includes: a first connecting piece (1), one end of which is provided with a first connecting structure (11), and the other end of which is connected with the side wall of the inner bracket of the armor type shield;
A second connecting piece (2), one end of which is provided with a second connecting structure (21), and the other end of which is connected with the side wall of the other adjacent internal bracket of the armor type shield;
the second connecting structure (21) is fixedly connected with the first connecting structure (11);
The first connecting structure (11) is a splicing groove, and the second connecting structure (21) is a bulge matched with the size of the splicing groove; the insertion groove is parallel to the end edge of the first connecting piece (1); the bulge protrudes out of the end edge of the second connecting piece (2) and is parallel to the inserting groove;
A bending part deviating from the second connecting piece (2) is arranged at a position, close to the inserting groove, in the first connecting piece (1), and a bending part deviating from the first connecting piece (1) is arranged at a position, close to the bulge, in the second connecting piece (2);
the front end of the first connecting piece (1) is overlapped with the front end of the second connecting piece (2) and is in mutual abutting joint in a state that the bulge is inserted into the inserting groove, and the rear ends of the first connecting piece are far away from each other and are respectively in abutting joint with and fixed on two adjacent side walls in the inner bracket of the armor type protective cover;
A limiting belt (9) is further connected between the inner brackets (41) on the inner sides of the scales, the limiting belt (9) is installed between the inner brackets (41) of the armor type protective cover and is fixed close to the side wall of the inner brackets (41), and the limiting belt is connected with the inner side end parts of the inner brackets (41) and the outer side end parts of the adjacent inner brackets (41);
The limiting belt (9) is stretched along with the armor type protective cover to be gradually straightened, the inner side of the inner support (41) of the scale is pulled outwards in an inclined mode, the outer side of the inner support (41) of the scale is pulled inwards in an inclined mode, the scale (4) connected with the inner support (41) is driven to turn inwards, and the inner wall of the scale is tightly attached to or abutted against the outer surface of one layer of scale in the scale.
2. The armour-type cover according to claim 1, characterized in that the distance between the end of the first connecting element (1) remote from the first connecting structure (11) and the end of the second connecting element (2) remote from the second connecting structure (21) is at least as great as the distance between adjacent inner struts in the stretched state of the armour-type cover.
3. Armor type shield according to claim 1, characterized in that a fixing element (3) is further arranged near the first connection structure (11) and the second connection structure (21), and the fixing element (3) limits the relative rotation between the first connection element (1) and the second connection element (2).
4. Armor type shield according to claim 1, characterized in that the restraining strips (9) are connected in sequence from inside to outside of the inner support (41) to which each layer of scales is connected to the outside of the inner support (41) of the other layer of scales.
5. A machine tool comprising an armour-type cover according to any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910882148.5A CN110449976B (en) | 2019-09-18 | 2019-09-18 | Armor formula guard shield and lathe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910882148.5A CN110449976B (en) | 2019-09-18 | 2019-09-18 | Armor formula guard shield and lathe |
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| CN110449976A CN110449976A (en) | 2019-11-15 |
| CN110449976B true CN110449976B (en) | 2024-04-26 |
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Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB961217A (en) * | 1967-03-14 | 1964-06-17 | Louis Henri Denys Marie Ballu | Improvements in armour |
| JPH02111736U (en) * | 1989-02-23 | 1990-09-06 | ||
| JP2007144534A (en) * | 2005-11-25 | 2007-06-14 | Naberu:Kk | Protective cover device |
| JP2008012639A (en) * | 2006-07-07 | 2008-01-24 | Naberu:Kk | Bellows |
| TWM362729U (en) * | 2009-02-27 | 2009-08-11 | Sun Yuan Technology Inc | Improved structure of stretchable protective cover |
| JP2014008541A (en) * | 2012-06-27 | 2014-01-20 | Brother Ind Ltd | Cover device and machine tool |
| JP2015009306A (en) * | 2013-06-27 | 2015-01-19 | 株式会社牧野フライス製作所 | Machine tool |
| CN204413749U (en) * | 2015-01-12 | 2015-06-24 | 苏州伟扬精机有限公司 | Quick-moving type armor telescopic cover |
| CN204430944U (en) * | 2014-12-24 | 2015-07-01 | 尚园科技有限公司 | Expansion guard cover |
| CN204430945U (en) * | 2014-12-24 | 2015-07-01 | 尚园科技有限公司 | Expansion guard cover |
| CN104999340A (en) * | 2015-07-30 | 2015-10-28 | 安庆市阳光机械制造有限责任公司 | Telescopic armor type machine tool protective cover |
| CN204771830U (en) * | 2015-07-30 | 2015-11-18 | 安庆市阳光机械制造有限责任公司 | Telescopic armour formula lathe protection casing |
| DE102014110571A1 (en) * | 2014-07-25 | 2016-01-28 | Thodacon Werkzeugmaschinenschutz Gmbh | Telescopic protective cover |
| DE202015001696U1 (en) * | 2015-03-05 | 2016-06-09 | Hema Maschinen- Und Apparateschutz Gmbh | Variable length protective cover with folding element |
| JP2016215364A (en) * | 2015-05-15 | 2016-12-22 | 株式会社ナベル | Shutter apparatus |
| CN206393342U (en) * | 2016-12-31 | 2017-08-11 | 东莞市世欣五金制品有限公司 | Armor protective cover |
| CN206952655U (en) * | 2017-07-11 | 2018-02-02 | 广东群辉防护技术有限公司 | A kind of Collapsible containment cover |
| CN208358403U (en) * | 2018-06-13 | 2019-01-11 | 上海交大智邦科技有限公司 | A kind of armor shield with mobile door |
| CN208749738U (en) * | 2018-08-20 | 2019-04-16 | 福建杜氏木业有限公司 | A kind of plank invisible connecting piece |
| CN211102984U (en) * | 2019-09-18 | 2020-07-28 | 河北速博机械制造有限公司 | Armoured shield and machine tool |
-
2019
- 2019-09-18 CN CN201910882148.5A patent/CN110449976B/en active Active
Patent Citations (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB961217A (en) * | 1967-03-14 | 1964-06-17 | Louis Henri Denys Marie Ballu | Improvements in armour |
| JPH02111736U (en) * | 1989-02-23 | 1990-09-06 | ||
| JP2007144534A (en) * | 2005-11-25 | 2007-06-14 | Naberu:Kk | Protective cover device |
| JP2008012639A (en) * | 2006-07-07 | 2008-01-24 | Naberu:Kk | Bellows |
| TWM362729U (en) * | 2009-02-27 | 2009-08-11 | Sun Yuan Technology Inc | Improved structure of stretchable protective cover |
| JP2014008541A (en) * | 2012-06-27 | 2014-01-20 | Brother Ind Ltd | Cover device and machine tool |
| JP2015009306A (en) * | 2013-06-27 | 2015-01-19 | 株式会社牧野フライス製作所 | Machine tool |
| DE102014110571A1 (en) * | 2014-07-25 | 2016-01-28 | Thodacon Werkzeugmaschinenschutz Gmbh | Telescopic protective cover |
| CN204430944U (en) * | 2014-12-24 | 2015-07-01 | 尚园科技有限公司 | Expansion guard cover |
| CN204430945U (en) * | 2014-12-24 | 2015-07-01 | 尚园科技有限公司 | Expansion guard cover |
| CN204413749U (en) * | 2015-01-12 | 2015-06-24 | 苏州伟扬精机有限公司 | Quick-moving type armor telescopic cover |
| DE202015001696U1 (en) * | 2015-03-05 | 2016-06-09 | Hema Maschinen- Und Apparateschutz Gmbh | Variable length protective cover with folding element |
| JP2016215364A (en) * | 2015-05-15 | 2016-12-22 | 株式会社ナベル | Shutter apparatus |
| CN104999340A (en) * | 2015-07-30 | 2015-10-28 | 安庆市阳光机械制造有限责任公司 | Telescopic armor type machine tool protective cover |
| CN204771830U (en) * | 2015-07-30 | 2015-11-18 | 安庆市阳光机械制造有限责任公司 | Telescopic armour formula lathe protection casing |
| CN206393342U (en) * | 2016-12-31 | 2017-08-11 | 东莞市世欣五金制品有限公司 | Armor protective cover |
| CN206952655U (en) * | 2017-07-11 | 2018-02-02 | 广东群辉防护技术有限公司 | A kind of Collapsible containment cover |
| CN208358403U (en) * | 2018-06-13 | 2019-01-11 | 上海交大智邦科技有限公司 | A kind of armor shield with mobile door |
| CN208749738U (en) * | 2018-08-20 | 2019-04-16 | 福建杜氏木业有限公司 | A kind of plank invisible connecting piece |
| CN211102984U (en) * | 2019-09-18 | 2020-07-28 | 河北速博机械制造有限公司 | Armoured shield and machine tool |
Non-Patent Citations (1)
| Title |
|---|
| 一种新型高速导轨防护罩;尤国强;机械工程师;20040325(第03期);64-65 * |
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