CN115324447A

CN115324447A - Differential motion aperture cover

Info

Publication number: CN115324447A
Application number: CN202211002732.5A
Authority: CN
Inventors: 李德胜; 王林; 程敏林; 奂玖平; 黄俊杰; 常项开; 殷军
Original assignee: Hubei Sanjiang Aerospace Wanfeng Technology Development Co Ltd
Current assignee: Hubei Sanjiang Aerospace Wanfeng Technology Development Co Ltd
Priority date: 2022-08-19
Filing date: 2022-08-19
Publication date: 2022-11-11
Anticipated expiration: 2042-08-19
Also published as: CN115324447B

Abstract

The invention relates to a differential motion aperture cover, which comprises an aperture frame fixedly connected with equipment, a main aperture cover and an auxiliary aperture cover which are sequentially arranged on the back surface of Kong Koukuang, and a driving cylinder connecting the aperture frame and the main aperture cover. The main opening cover and the auxiliary opening cover are designed in a superposed mode, so that the occupied space of the opening covers is reduced; through increasing differential mechanism, only need a power supply of actuating cylinder just can realize main flap, vice flap along the linear differential removal of vertical direction, stop gear is used for controlling the opening height of vice flap.

Description

Differential motion aperture cover

Technical Field

The invention relates to the technical field of automatic special equipment, in particular to a hatch cover moving in a differential mode.

Background

The doors and windows of the special automation equipment are generally provided with hatch covers which are mainly used for people or articles to enter and exit, used as observation windows, used for protecting people and the like. The structural forms of the hatch cover are various, and the hatch cover has a plurality of opening modes, such as inward or outward turnover type, left-right translation push-pull type, up-down translation lifting type, rolling shutter type and the like. Conventional aperture covers are opened and closed primarily manually. With the development of modern industrial technology, the automation degree of mechanical equipment is higher and higher. In recent years, various novel hatches have been developed, and the opening and closing modes thereof tend to be automated and intelligent.

On some special equipment, because of limited equipment space, a large hole needs to be opened quickly by a hole cover, so that equipment operation and entering and exiting of personnel or goods are facilitated. Among the prior art, for realizing this kind of function, design into the mode of main flap and vice flap combination with the flap usually to install differential mechanism additional in equipment, the flap opening in-process, vice flap can be relative main flap motion under differential mechanism's effect, and vice flap opening speed is faster than main flap opening speed like this, thereby realizes the open-ended purpose of increase flap fast. However, such differentials are generally only suitable for use with a rotatably open aperture cover and not for use with a linearly open aperture cover; and the differential mechanism has the advantages of complex structure, high maintenance difficulty and high cost. In addition, two power sources are usually needed to drive the main opening cover and the auxiliary opening cover to move respectively in the prior art, the cost is high, and the occupied space of the two power sources is large. Therefore, the prior art has the defects of low applicability, complex structure, high maintenance difficulty and high cost.

Disclosure of Invention

The invention aims to provide a hatch cover with differential motion, wherein a main hatch cover and an auxiliary hatch cover are designed in a superposed manner, so that the occupied space of the hatch cover is reduced; through the addition of the differential mechanism, the linear differential movement of the main port cover and the auxiliary port cover along the vertical direction can be realized only by one power source of the driving cylinder.

In order to achieve the purpose, the differential motion aperture cover comprises an aperture frame, a main aperture cover, a driving cylinder and two auxiliary aperture covers, wherein the Kong Koukuang is fixedly connected with equipment; the lower end of the main port cover is symmetrically provided with two auxiliary ports matched with the auxiliary port cover in size, the middle of the front surface of the main port cover is provided with a main linear slide rail matched with the hollow upright post Kong Koukuang, two sides of the main linear slide rail are symmetrically provided with two mounting frames, the back surface of the main port cover is provided with an auxiliary linear slide rail matched with the auxiliary port cover, the cylinder body of the driving cylinder is mounted in the hollow upright post Kong Koukuang, and the output end of the driving cylinder is connected with the upper end of the main port cover; the method is characterized in that: the aperture cover with differential motion also comprises two differential mechanisms and two limiting mechanisms; the two differential mechanisms are respectively arranged in the two mounting frames of the main opening cover, the two limiting mechanisms are respectively arranged at two sides of the hollow upright post of Kong Koukuang, and the limiting mechanisms are positioned right in front of the differential mechanisms;

the differential mechanism comprises a fixed frame, an upper pulley assembly, a lower pulley assembly, a transmission belt and a clamping block; the fixing frame is fixedly connected with the mounting frame, an opening is formed in the middle of the fixing frame in the vertical direction, the upper pulley assembly is arranged at the upper end of the opening, the lower pulley assembly is arranged at the lower end of the opening, the transmission belt is meshed with the upper pulley assembly and the lower pulley assembly, the inner side of the clamping block is fixedly connected with the transmission belt on the back side, and the outer side of the clamping block is fixedly connected with the auxiliary opening cover;

the limiting mechanism comprises a body and a limiting slide block, the body is installed on the side face of the hollow stand column, the limiting slide block comprises an outer slide block and an inner slide block, the outer slide block is installed on the body, a positive transmission belt is arranged between the outer slide block and the inner slide block, and the outer slide block, the positive transmission belt and the inner slide block are fixedly connected through screws.

After the limiting slide block is blocked by the limiting mechanism body, the main port cover and the differential mechanism continue to move upwards along with the driving cylinder because the positive driving belt is clamped by the limiting slide block, at the moment, the limiting slide block pulls the positive driving belt to rotate around the upper pulley assembly and the lower pulley assembly, so that the driving belt drives the auxiliary port cover to move relative to the main port cover, the moving speed of the auxiliary port cover is higher than that of the main port cover, and the auxiliary port cover and the main port cover generate speed difference.

According to the preferable scheme, the fixing frame comprises an outer frame, an inner frame, a reinforcing plate and guide grooves, the outer frame is fixedly connected with the mounting frame through a plurality of screws, the inner frame is vertically arranged on the back face of the outer frame, the opening is formed in the middle of the inner frame, the reinforcing plate is arranged in the middle of the opening, two sides of the reinforcing plate are fixedly connected with the inner side of the inner frame, and the guide grooves are symmetrically and fixedly arranged at the lower end of the inner frame.

Further, the upper pulley subassembly includes upper pulley, upper pulley frame, goes up the fixed axle, upper pulley frame fixed mounting is in the inside casing upper end, go up the fixed axle and transversely install in the upper pulley frame, the upper pulley is worn to establish at last fixed axle outside, drive belt upper end and upper pulley meshing.

Furthermore, the lower pulley assembly comprises a lower pulley, a lower pulley frame and a lower fixing shaft, the lower pulley frame is slidably mounted in the guide groove, a mounting hole is formed in the lower end of the lower pulley frame, the lower fixing shaft is transversely mounted in the lower pulley frame, the lower pulley is arranged outside the lower fixing shaft in a penetrating mode, and the lower end of the transmission belt is meshed with the lower pulley.

Furthermore, the clamping block comprises an outer clamping block and an inner clamping block, the transmission belt on the back surface is arranged between the outer clamping block and the inner clamping block, the transmission belt on the back surface, the outer clamping block and the auxiliary opening cover are fixedly connected through screws.

Furthermore, the differential mechanism further comprises a tensioning screw rod used for adjusting the tightness of the transmission belt and a tensioning spring sleeved outside the tensioning screw rod, the tensioning screw rod is arranged in a circular hole in the lower end of the inner frame, the upper end of the tensioning screw rod is arranged in a mounting hole in the lower end of the lower pulley frame, a gap is reserved between the upper end of the tensioning screw rod and the lower end of the transmission belt, and the lower end of the tensioning screw rod locks the tensioning spring through a gasket and a nut.

Further, the body comprises an upper mounting seat, a lower mounting seat, a guide rod and two buffer springs; the upper mounting seat and the lower mounting seat are mounted on the side face of the hollow upright column from top to bottom, two ends of the guide rod are mounted in the upper mounting seat and the lower mounting seat respectively, the middle of the guide rod penetrates through a unthreaded hole formed in the outer sliding block, and the two buffer springs are sleeved at two ends of the guide rod respectively.

Further, the upper mounting seat comprises an upper fixing block and an upper connecting block which are perpendicular to each other, the upper fixing block is connected with the upper portion of the side face of the hollow upright column through a screw, the upper connecting block is perpendicular to the guide rod, and the upper end of the guide rod penetrates through a through hole of the upper connecting block and is locked through a nut.

Further, the lower mounting seat comprises a lower fixing block and a lower connecting block which are perpendicular to each other, the lower fixing block is connected with the middle of the side face of the hollow upright column through a screw, the lower connecting block is perpendicular to the guide rod, and the lower end of the guide rod penetrates through a through hole of the lower connecting block and is locked through a nut.

The invention has the beneficial effects that:

the hatch cover with differential motion is designed by overlapping the main hatch cover and the auxiliary hatch cover, so that the occupied space of the hatch cover can be reduced; the linear differential movement of the main opening cover and the auxiliary opening cover along the vertical direction can be realized only by driving one power source of the cylinder, so that the cost can be greatly reduced; the transmission belt is a self-adaptive tensioning transmission belt, so that the stable operation of the auxiliary opening cover can be ensured.

The principle of generating linear differential of the main opening cover and the auxiliary opening cover is as follows: after the limiting slide block is blocked by limiting mechanism's body upper end, because positive drive belt is pressed from both sides tightly motionless by limiting slide block, and the main flap, differential mechanism continue along with the driving cylinder upward movement, at this moment, limiting slide block can only stimulate positive drive belt around pulley assembly, the lower pulley assembly rotates, the vice flap upward movement of drive belt pulling setting at the fixed frame back, at this moment, vice flap except along with main flap upward movement together, vice flap still moves upward relative to the main flap under the pulling of drive belt simultaneously, consequently vice flap velocity of motion is faster than main flap velocity of motion, vice flap, the two production speed difference of main flap. The movement principle of the closing process and the opening process of the hatch is the same, but the movement directions are opposite.

In conclusion, the invention has the advantages of high applicability, simple structure, small maintenance difficulty, low cost and small occupied space.

Drawings

FIG. 1 is a front perspective view of the present invention in an open state;

FIG. 2 is a schematic view of a back side perspective structure of the present invention in an open state;

FIG. 3 is a front perspective view of the present invention in a closed state;

FIG. 4 is a schematic perspective view of the main flap;

FIG. 5 is a schematic perspective view of the secondary linear slide rail and the back of the secondary flap;

FIG. 6 is a schematic perspective view of Kong Koukuang and a drive cylinder;

FIG. 7 is a schematic front perspective view of the differential mechanism and the limiting mechanism;

FIG. 8 is a schematic view of a back side perspective structure of the differential mechanism and the limiting mechanism;

FIG. 9 is a schematic view of the differential mechanism and the limiting mechanism;

fig. 10 is a schematic perspective view of the back surface of the fixing frame;

FIG. 11 is a schematic perspective view of the upper pulley assembly;

FIG. 12 is a schematic perspective view of the lower pulley assembly;

FIG. 13 is a schematic perspective view of a spacing mechanism;

FIG. 14 is a schematic view of the closing to opening process of the present invention;

FIG. 15 is a schematic diagram of the differential generation of the present invention.

The reference numbers in the figures are as follows:

kong Koukuang 1 (hollow upright post 11, side wall 12), main port cover 2, auxiliary port cover 3 (reinforcing block 31), driving cylinder 4, differential mechanism 5, and limit mechanism 6;

main port cover 2: the auxiliary orifice 21, the mounting frame 22, the main orifice 23, the main linear slide rail 24, and the auxiliary linear slide rail 25;

the driving cylinder 4: a main cylinder 41, a sub-cylinder 42;

the differential mechanism 5: a fixed frame 51, an opening 52, an upper pulley assembly 53, a lower pulley assembly 54, a transmission belt 55, a pressing block 56, a clamping block 57 (an outer clamping block 571 and an inner clamping block 572), a tension screw 58 and a tension spring 59;

the fixing frame 51: an outer frame 511, an inner frame 512, a reinforcing plate 513, a guide groove 514 and a round hole 515;

upper pulley assembly 53: an upper pulley 531, an upper pulley frame 532, an upper fixed shaft 533;

lower pulley block 54: a lower pulley 541, a lower pulley frame 542, a lower fixed shaft 543, and a mounting hole 544;

and a limiting mechanism 6: the device comprises a body 60, an upper mounting seat 61 (an upper fixing block 611 and an upper connecting block 612), a lower mounting seat 62 (a lower fixing block 621 and a lower connecting block 622), a guide rod 63, a buffer spring 64 and a limiting sliding block 65;

the limiting slide block 65: outer slider 651, inner slider 652, light aperture 653.

Detailed Description

In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; 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 meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

The visible surface of the orifice frame 1 is defined as a front surface, the invisible surface of the orifice frame 1 is defined as a back surface, the front surface corresponds to the outer side, and the back surface corresponds to the inner side.

As shown in fig. 1 to 3, the aperture cover with differential motion related to the present invention comprises an aperture frame 1 fixedly connected with equipment through screws, a main aperture cover 2, a driving cylinder 4, two auxiliary aperture covers 3, two differential mechanisms 5 and two limiting mechanisms 6. The lower end of the main opening cover 2 is symmetrically provided with two auxiliary openings 21 matched with the auxiliary opening covers 3 in size, the middle of the front surface of the main opening cover 2 is provided with a main linear slide rail 24 matched with the hollow upright post 11 of the opening frame 1, two sides of the front surface of the main opening cover 2 are symmetrically provided with two main linear slide rails 24 matched with the side wall 12 of the opening frame 1, two sides of the middle main linear slide rail 24 are symmetrically provided with two mounting frames 22 along the vertical direction, and two differential mechanisms 5 are respectively mounted in the two mounting frames 22; the back of the main port cover 2 is provided with an auxiliary linear slide rail 25 matched with the auxiliary port cover 3, the cylinder body of the driving cylinder 4 is arranged in the hollow upright post 11 of Kong Koukuang, and the output end of the driving cylinder 4 is connected with the upper end of the main port cover 2; the two limiting mechanisms 6 are respectively arranged on two sides of the hollow upright post 11, and the limiting mechanisms 6 are arranged in parallel in the front of the differential mechanism 5.

As shown in fig. 4, three main linear sliding rails 24 are installed on the front surface of the main opening cover 2 through screws, one main linear sliding rail 24 in the middle of the main opening cover 2 is in sliding fit with a sliding block on the back surface of the hollow upright post 11, and two main linear sliding rails 24 on the two sides of the main opening cover 2 are in rolling fit with cam sets on the back surfaces of the two side walls 12 respectively. The back of the main opening cover 2 is provided with four linear auxiliary sliding rails through screws respectively, and the four linear auxiliary sliding rails are matched with the sliding blocks on the two auxiliary opening covers 3. The main opening cover 2 is symmetrically provided with two rectangular mounting frames 22 along a middle linear slide rail, the two mounting frames 22 are positioned on the side surfaces of the two auxiliary orifices 21, and the two differential mechanisms 5 are respectively arranged in the two mounting frames 22; the limiting mechanism 6 is arranged on the front side of the differential mechanism 5 in parallel, the stroke of the limiting mechanism 6 is smaller than that of the differential mechanism 5, and one end of the limiting mechanism 6 is fixedly connected with the hollow upright post 11 of the orifice frame 1 through a screw; when the limiting slide block 65 is blocked by the limiting mechanism 6, the transmission belt 55 starts to rotate around the upper pulley component 53 and the lower pulley component 54, the transmission belt 55 drives the auxiliary opening cover 3 to move relative to the main opening cover 2, the moving speed of the auxiliary opening cover 3 is higher than that of the main opening cover 2, and the speed difference is generated between the auxiliary opening cover 3 and the main opening cover 2.

As shown in fig. 5, each secondary flap 3 is respectively provided with two reinforcing blocks 31, four sliding blocks, two oil storage boxes and two anti-collision blocks, each secondary linear sliding rail 25 passes through one oil storage box, lubricating grease is stored in the oil storage box, so that lubrication can be provided for the secondary linear sliding rail 25, and the two anti-collision blocks are used for preventing the sliding blocks from being damaged by overtravel.

As shown in fig. 6, the aperture frame 1 includes a hollow upright post 11 and two side walls 12 disposed at two sides of the hollow upright post 11, a slider engaged with the main linear slide rail 24 in the middle is mounted at the back of the hollow upright post 11, and a cam set engaged with the main linear slide rails 24 at two sides is mounted at the back of each of the two side walls 12.

The invention only needs one power source of the driving cylinder 4, and the driving cylinder 4 can be a servo electric cylinder, an air cylinder or a hydraulic cylinder. The driving cylinder 4 is divided into two-stage driving, and can realize a longer stroke, the driving cylinder 4 comprises a main cylinder 41 and an auxiliary cylinder 42, the main cylinder 41 is arranged in the hollow cylinder body, the auxiliary cylinder 42 is arranged in the main cylinder 41, and the top of the auxiliary cylinder 42 extends out of the main cylinder 41; the hollow cylinder body is fixedly connected with the orifice frame 1 through a screw, and the auxiliary cylinder 42 is connected with the top end of the main orifice cover 2 through a pin shaft. The sub-cylinder 42 is extended faster than the main cylinder 41 because the sub-cylinder 42 has a smaller cylinder diameter than the main cylinder 41, and the sub-cylinder 42 is extended faster than the main cylinder 41 under a constant pressure.

As shown in fig. 7 to 9, the differential mechanism 5 includes a fixed frame 51 fixedly connected with the main door 2 by screws, an opening 52 is formed in the middle of the fixed frame 51 along the vertical direction, the differential mechanism 5 further includes an upper pulley assembly 53 transversely disposed at the upper end of the opening 52, a lower pulley assembly 54 transversely disposed at the lower end of the opening 52, a transmission belt 55 engaged with the upper pulley assembly 53 and the lower pulley assembly 54, a limit slider 65 disposed at the front of the fixed frame 51 and capable of sliding on the limit mechanism 6, two clamping blocks 57 disposed at the back of the fixed frame 51, and a pressing block 56; the pressure piece 56 is arranged between two clamping pieces 57. The clamping block 57 comprises an outer clamping block 571 and an inner clamping block 572, the transmission belt 55 on the back side is arranged between the outer clamping block 571 and the inner clamping block 572, the transmission belt 55 on the back side, the outer clamping block 571 and the reinforcing block 31 on the back side of the auxiliary opening cover 3 are fixedly connected through screws, so that the auxiliary opening cover 3 can move together with the transmission belt 55. The pressing block 56 comprises an upper pressing block and a lower pressing block, and the end-to-end parts of the transmission belt 55 are pressed tightly through the upper pressing block and the lower pressing block to form a closed ring shape, so that the transmission belt 55 can be tensioned conveniently.

The differential mechanism 5 further comprises a tensioning screw 58 for adjusting the tightness of the transmission belt 55 and a tensioning spring 59 sleeved outside the tensioning screw 58, the tensioning screw 58 is arranged in a circular hole 515 at the lower end of the inner frame 512, the upper end of the tensioning screw 58 is arranged in a mounting hole 544 at the lower end of the lower pulley frame 542, a gap is reserved between the upper end of the tensioning screw 58 and the lower end of the transmission belt 55, and the lower end of the tensioning screw 58 locks the tensioning spring 59 through a gasket and a nut.

As shown in fig. 10, the fixing frame 51 includes an outer frame 511 and an inner frame 512 having an opening structure in the middle, and a reinforcing plate 513 disposed in the opening of the inner frame 512, the outer frame 511 is fixedly connected to the main flap 2 by a plurality of screws, a circular hole 515 is disposed at the lower end of the inner frame 512, the inner frame 512 extends toward the back of the main flap 2, the depth of the inner frame 512 is matched with the diameters of the upper pulley assembly 53 and the lower pulley assembly 54, the reinforcing plate 513 is disposed between the inner and outer transmission belts 55, and the reinforcing plate 513 can increase the strength of the inner frame 512 and prevent the inner frame 512 from deforming.

As shown in fig. 11, the upper pulley assembly 53 includes an upper pulley assembly 531, an upper pulley frame 532, and an upper fixing shaft 533, the upper pulley frame 532 is fixedly installed at the upper end of the inner frame 512, the upper fixing shaft 533 is transversely installed in the upper pulley frame 532, the upper pulley assembly 531 is inserted outside the upper fixing shaft 533, and the upper end of the driving belt 55 is engaged with the upper pulley assembly 531.

As shown in fig. 12, the lower pulley assembly 54 includes a lower pulley assembly 541, a lower pulley frame 542, and a lower fixing shaft 543, the lower pulley frame 542 is slidably mounted in the guide groove 514, the lower pulley assembly 54 is slidable in the guide groove 514 and used for adjusting the tension of the driving belt 55 together with the tension screw 58, the lower pulley assembly 54 is anti-loose by means of the tension screw 58 and the tension spring 59, a mounting hole 544 is formed at the lower end of the lower pulley frame 542, the lower fixing shaft 543 is transversely mounted in the lower pulley frame 542, the lower pulley assembly 541 is inserted outside the lower fixing shaft 543, and the lower end of the driving belt 55 is engaged with the lower pulley assembly 541.

As shown in fig. 13, the limiting mechanism 6 includes a body 60 and a limiting slider 65, wherein the body 60 includes an upper mounting seat 61, a lower mounting seat 62, a guide rod 63, and two buffer springs 64; go up mount pad 61, lower mount pad 62 from top to bottom install in cavity stand 11 side, guide bar 63 is installed at last mount pad 61, down between the mount pad 62, guide bar 63 parallel arrangement is positive at fixed frame 51, buffer spring 64 sets up both ends about guide bar 63, buffer spring 64 can avoid limit slide 65 and last mount pad 61 and mount pad 62 to collide down, play the cushioning effect, and the sliding distance of adjustment limit slide 65 that can the self-adaptation on guide bar 63, avoid vice flap 3 random motion or landing, prevent vice flap 3 motion range excessive simultaneously. The outer side of the limiting slide block 65 is arranged in the guide rod 63 in a penetrating mode, and the inner side of the limiting slide block 65 is fixedly connected with the front driving belt 55 through screws.

The upper mounting seat 61 comprises an upper fixing block 611 and an upper connecting block 612 which are perpendicular to each other, the upper fixing block 611 is connected with the upper portion of the side face of the hollow upright post 11 through a screw, the upper connecting block 612 is perpendicular to the guide rod 63, and the upper end of the guide rod 63 penetrates through a through hole of the upper connecting block 612 and is locked by a nut. The lower mounting seat 62 comprises a lower fixing block 621 and a lower connecting block 622 which are perpendicular to each other, the lower fixing block 621 is connected with the middle of the side face of the hollow upright post 11 through a screw, the lower connecting block 622 is perpendicular to the guide rod 63, and the lower end of the guide rod 63 penetrates through a through hole of the lower connecting block 622 and is locked through a nut. The limiting slide block 65 comprises an outer slide block 651 and an inner slide block 652, the outer slide block 651 is provided with a light hole 653 for installing the guide rod 63, the front transmission belt 55 is arranged between the outer slide block 651 and the inner slide block 652, and the outer slide block 651, the front transmission belt 55 and the inner slide block 652 are fixedly connected through screws.

The opening process of the hatch cover comprises the following steps:

as shown in fig. 14, the opening process of the hatch is divided into an early stage of ascent and a late stage of ascent. In the early stage of rising, the main opening cover 2 moves upwards relative to the opening frame 1 under the action of the driving cylinder 4, the auxiliary opening cover 3 and the differential mechanism 5 move upwards together with the main opening cover 2, wherein the limiting slide block 65 slides upwards on the limiting mechanism 6, and the transmission belt 55, the upper pulley assembly 53 and the lower pulley assembly 54 are relatively static at the moment; in the later stage of rising, the limiting slide block 65 is blocked by the upper end of the limiting mechanism 6, because the positive drive belt 55 is clamped by the limiting slide block 65 and is not moved, the main port cover 2 and the differential mechanism 5 continue to move upwards under the action of the driving cylinder 4, at the moment, the limiting slide block 65 can only pull the positive drive belt 55 to rotate around the upper pulley assembly 53 and the lower pulley assembly 54, the drive belt 55 pulls the auxiliary port cover 3 arranged on the back surface of the fixed frame 51 to move upwards, at the moment, the auxiliary port cover 3 moves upwards along with the main port cover 2, and the auxiliary port cover 3 simultaneously moves upwards relative to the main port cover 2 under the pulling of the drive belt 55, so the movement speed of the auxiliary port cover 3 is higher than that of the main port cover 2, and the speed difference is generated between the auxiliary port cover 3 and the main port cover 2, and the movement principle is the same as that of the movable pulley.

After the main port cover 2 rises, a main port 23 is formed between the main port cover 2 and the equipment, the rising height of the main port cover 2, namely the height of the main port 23, is H1, the stroke of the driving cylinder 4 is H2, the height of the auxiliary port 21 is H3, and the rising height of the auxiliary port cover 3 is H4; h1= H2, H4 ≧ H1+ H3. The stroke of the limiting mechanism 6 is smaller than that of the differential mechanism 5, and the limiting mechanism 6 is used for adjusting the rising height of the auxiliary opening cover 3, preventing the auxiliary opening cover 3 from being separated from the main opening cover 2 and providing buffer for the movement of the limiting slide block 65.

The movement principle of the closing process and the opening process of the hatch is the same, but the movement directions are opposite.

As shown in fig. 15, on the left side, the length of the transmission belt between the upper end of the limiting mechanism 6 and the upper pulley assembly 53 is L1, and the length of the transmission belt between the upper end of the auxiliary flap 3 and the upper pulley assembly 53 is L2; on the right side, the length of a transmission belt between the upper end of the limiting mechanism 6 and the upper pulley assembly 53 is L1', and the length of a transmission belt between the upper end of the auxiliary opening cover 3 and the upper pulley assembly 53 is L2'; the main flap 2 rises, that is, the upper sheave assembly 53 rises at a height H5, and the sub flap 3 rises at a height H6.

The total length of the transmission belt from the upper end section of the limiting mechanism 6 to the upper end section of the auxiliary opening cover 3 is unchanged, namely L1+ L2= L1'+ L2', and the elongation of the transmission belt at the left section = the contraction of the transmission belt at the right section, namely L1'-L1= L2-L2'; as can be seen from the figure, L1'= L1+ H5, H5+ L2= L2' + H6; thus, H6=2H5. It can be seen that the auxiliary flap 3 is raised twice as far as the main flap 2 in the differential speed generation stage.

Because the hatch board rises earlier stage, by the effect of spacing mechanism 6, vice flap 3 lifting distance equals with main flap 2 lifting distance, and stop mechanism 6 is used for adjusting vice flap 3's whole rising height promptly, prevents that vice flap 3 breaks away from main flap 2, consequently, the height H4 that whole rising in-process vice flap 3 rises is greater than the height H1 that main flap 2 rises, and the two is not twice the relation. In addition, the buffer spring 64 in the limit mechanism 6 also provides buffer for the movement of the limit slider 65.

The length and the installation position of the transmission belt 55 in the two differential mechanisms 5 are adjusted to be consistent so as to ensure that the opening and the closing of the two auxiliary opening covers 3 are synchronous. In addition, the transmission belt can be changed into a steel wire rope for transmission.

In the actual use process, the front skin and the rear skin are additionally arranged outside the aperture cover, so that the purposes of attractiveness and aperture cover protection can be achieved.

The differential motion hatch cover is not only suitable for doors and windows of special equipment, but also suitable for machine tool shield doors, boiler doors, automobile skylights, rocket hatches, ship hatches, garage doors, square hatches and the like.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The differential motion aperture cover comprises Kong Koukuang (1), a main aperture cover (2), a driving cylinder (4) and two auxiliary aperture covers (3), wherein Kong Koukuang (1) is fixedly connected with equipment; the lower end of the main opening cover (2) is symmetrically provided with two auxiliary openings (21) matched with the auxiliary opening cover (3) in size, the middle of the front side of the main opening cover (2) is provided with a main linear sliding rail (24) matched with the hollow upright post (11) of the opening frame (1), two sides of the main linear sliding rail (24) are symmetrically provided with two mounting frames (22), the back side of the main opening cover (2) is provided with an auxiliary linear sliding rail (25) matched with the auxiliary opening cover (3), a cylinder body of the driving cylinder (4) is mounted in the hollow upright post (11) of Kong Koukuang (1), and the output end of the driving cylinder (4) is connected with the upper end of the main opening cover (2); the method is characterized in that: the aperture cover with differential motion also comprises two differential mechanisms (5) and two limiting mechanisms (6); the two differential mechanisms (5) are respectively arranged in the two mounting frames (22) of the main opening cover (2), the two limiting mechanisms (6) are respectively arranged at two sides of the hollow upright post (11) of the Kong Koukuang (1), and the limiting mechanisms (6) are positioned right in front of the differential mechanisms (5);

the differential mechanism (5) comprises a fixed frame (51), an upper pulley assembly (53), a lower pulley assembly (54), a transmission belt (55) and a clamping block (57); the fixing frame (51) is fixedly connected with the mounting frame (22) of the main opening cover (2), an opening (52) is formed in the middle of the fixing frame (51) in the vertical direction, the upper pulley assembly (53) is arranged at the upper end of the opening (52), the lower pulley assembly (54) is arranged at the lower end of the opening (52), the transmission belt (55) is meshed with the upper pulley assembly (53) and the lower pulley assembly (54), the inner side of the clamping block (57) is fixedly connected with the transmission belt (55) on the back side, and the outer side of the clamping block (57) is fixedly connected with the auxiliary opening cover (3);

the limiting mechanism (6) comprises a body (60) and a limiting sliding block (65), the body (60) is installed on the side face of the hollow upright post (11), the limiting sliding block (65) comprises an outer sliding block (651) and an inner sliding block (652), the outer sliding block (651) is installed on the body (60), a front driving belt (55) is arranged between the outer sliding block (651) and the inner sliding block (652), and the outer sliding block (651), the front driving belt (55) and the inner sliding block (652) are fixedly connected through screws.

2. The differentially movable aperture cover according to claim 1, wherein: fixed frame (51) include frame (511), inside casing (512), reinforcing plate (513), guide way (514), frame (511) are through a plurality of screws and installing frame (22) fixed connection, inside casing (512) set up the back at frame (511) perpendicularly, the centre at inside casing (512) is seted up in opening (52), reinforcing plate (513) set up at opening (52) middle part, reinforcing plate (513) both sides and inside casing (512) inboard fixed connection, guide way (514) symmetry fixed mounting is at inside casing (512) lower extreme.

3. The differentially movable aperture cover of claim 2, wherein: the upper pulley component (53) comprises an upper pulley (531), an upper pulley frame (532) and an upper fixing shaft (533), the upper pulley frame (532) is fixedly installed at the upper end of the inner frame (512), the upper fixing shaft (533) is transversely installed in the upper pulley frame (532), the upper pulley (531) penetrates through the outer portion of the upper fixing shaft (533), and the upper end of the transmission belt (55) is meshed with the upper pulley (531).

4. The differentially movable aperture cover of claim 3, wherein: lower pulley subassembly (54) include lower pulley (541), lower pulley frame (542), lower fixed axle (543), lower pulley frame (542) slidable mounting is in guide way (514), and mounting hole (544) are seted up to lower pulley frame (542) lower extreme, lower fixed axle (543) transversely installs in lower pulley frame (542), lower pulley (541) are worn to establish at lower fixed axle (543) outside, and drive belt (55) lower extreme and lower pulley (541) mesh.

5. The differentially movable aperture cover of claim 4, wherein: the clamping block (57) comprises an outer clamping block (571) and an inner clamping block (572), a transmission belt (55) on the back side is arranged between the outer clamping block (571) and the inner clamping block (572), the transmission belt (55) on the back side, the outer clamping block (571) and the auxiliary opening cover (3) are fixedly connected through screws.

6. The differentially movable aperture cover of claim 5, wherein: the differential mechanism (5) further comprises a tensioning screw rod (58) used for adjusting the tightness of the transmission belt (55) and a tensioning spring (59) sleeved outside the tensioning screw rod (58), the tensioning screw rod (58) is arranged in a circular hole (515) in the lower end of the inner frame (512), the upper end of the tensioning screw rod (58) is arranged in a mounting hole (544) in the lower end of the lower pulley frame (542), a gap is reserved between the upper end of the tensioning screw rod (58) and the lower end of the transmission belt (55), and the lower end of the tensioning screw rod (58) locks the tensioning spring (59) through a gasket and a nut.

7. The differentially movable aperture cover according to claim 6, wherein: the body (60) comprises an upper mounting seat (61), a lower mounting seat (62), a guide rod (63) and two buffer springs (64); go up mount pad (61), install in cavity stand (11) side down mount pad (62) from top to bottom, guide bar (63) both ends are installed respectively in last mount pad (61), lower mount pad (62), and light hole (653) of seting up on outer slider (651) are passed in guide bar (63) middle part, two buffer spring (64) are established respectively at guide bar (63) both ends.

8. The differentially movable aperture cover of claim 7, wherein: the upper mounting seat (61) comprises an upper fixing block (611) and an upper connecting block (612) which are perpendicular to each other, the upper fixing block (611) is connected with the upper portion of the side face of the hollow upright post (11) through a screw, the upper connecting block (612) is perpendicular to the guide rod (63), and the upper end of the guide rod (63) penetrates through a through hole of the upper connecting block (612) and is locked through a nut.

9. The differentially movable aperture cover of claim 8, wherein: lower mount pad (62) are including mutually perpendicular's lower fixed block (621) and lower connecting block (622), and lower fixed block (621) passes through bolted connection with hollow upright post (11) side middle part, lower connecting block (622) are perpendicular with guide bar (63), the through-hole of connecting block (622) is passed down to guide bar (63) lower extreme and is locked with the nut.