CN110578458B - Buffering type door leaf anti-pinch device - Google Patents
Buffering type door leaf anti-pinch device Download PDFInfo
- Publication number
- CN110578458B CN110578458B CN201810591103.8A CN201810591103A CN110578458B CN 110578458 B CN110578458 B CN 110578458B CN 201810591103 A CN201810591103 A CN 201810591103A CN 110578458 B CN110578458 B CN 110578458B
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- main
- ventilation
- ejector rod
- door leaf
- main piston
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- 230000003139 buffering effect Effects 0.000 title abstract description 4
- 238000009423 ventilation Methods 0.000 claims description 113
- 238000007789 sealing Methods 0.000 claims description 29
- 239000012528 membrane Substances 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 abstract description 15
- 238000007906 compression Methods 0.000 abstract description 15
- 230000001965 increasing effect Effects 0.000 abstract description 12
- 230000006378 damage Effects 0.000 abstract description 3
- 230000007423 decrease Effects 0.000 description 9
- 230000000903 blocking effect Effects 0.000 description 8
- 238000009434 installation Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000013022 venting Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B7/00—Special arrangements or measures in connection with doors or windows
- E06B7/28—Other arrangements on doors or windows, e.g. door-plates, windows adapted to carry plants, hooks for window cleaners
- E06B7/36—Finger guards or other measures preventing harmful access between the door and the door frame
Abstract
The invention relates to a buffer type door leaf anti-pinch device. In daily life, the hand is often injured by the door leaf, and serious damage is caused. The invention is composed of a buffer type inflator component with a locking device, the compression resistance of which is automatically adjusted along with the compression speed, and an inflator fixing seat which is matched with an auxiliary fixing seat or an inclined surface stop block. The invention has simple structure and convenient use, and is suitable for various opening and closing doors and sliding doors. The resistance of the buffering type door leaf anti-pinch device can be automatically adjusted according to the closing speed of the door leaf. When the speed of closing the door leaf is smaller, the resistance of the buffer type door leaf anti-pinch device is smaller, and the door can be easily closed. When the door leaf is closed at a high speed, the resistance of the buffer type door leaf anti-clamping device is automatically increased when a clamping accident is possibly caused, so that the closing speed of the door leaf is reduced when the door is closed, and even the door leaf is directly blocked by the locking device, so that the accident of clamping the door leaf is effectively prevented.
Description
Technical Field
The invention relates to a door leaf anti-pinch device. In particular to a mechanical device which is fixedly arranged on a door leaf or a door frame and is used for preventing the door leaf from clamping a hand accident.
Background
In daily life, the hands are often injured by the door leaves. The bleeding is light, the skin is broken, and the bone is injured by heavy, so that serious damage is caused.
Products for preventing door leaf from clamping hands in the market at present mainly comprise two types: the products such as the door blocking card, the door blocking plug and the like which are made of soft materials such as sponge are various in market and various in shape, and can play a role in preventing door leaves from clamping hands. However, the products are all independent products separated from the door, the products are required to be assembled immediately when the door is opened, and the products are required to be taken down for being placed separately when the door is closed, so that the use is inconvenient. And can not ensure that the door stop is remembered to be installed or the door stopper is blocked after each door opening, so that the function of preventing the clamping hand is lost. Meanwhile, when the door is closed, the door blocking card and the blocking door plug are easy to lose because the product must be taken off and placed separately. The other type is a protection strip for preventing the door from being clamped, the products are more in market, the basic principles are similar, and the protection strip is fixedly arranged on the door shaft side, but only the door crack on the door shaft side can be prevented from being clamped, so that the door lock side clamping accidents more frequent in accidents can not be overcome.
Disclosure of Invention
The invention aims to overcome the defects of the existing anti-pinch products in installation and use, and provides a buffer type door leaf anti-pinch device which reduces the occurrence of accidents that hands are pinched by door leaves.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention is composed of a buffer type inflator component 2-2 with a locking device, the compression resistance of which is automatically adjusted along with the compression speed, and an inflator fixing seat 2-1 which is matched with an auxiliary fixing seat 2-3 or an inclined surface stop block 2-5 and an auxiliary positioning seat 2-4.
The buffer type inflator assembly 2-2 comprises a main piston ejector rod 38 which can move up and down, a bearing 1 and a bearing shaft 2 for fixing the bearing are arranged at the upper part of the main piston ejector rod 38, and the bearing 1 slightly protrudes out of the upper edge of the main piston ejector rod 38; the main air cylinder shell 12 is sleeved outside the main piston ejector rod 38, the lower piston of the main piston ejector rod 38 can move up and down along the inner wall of the main air cylinder shell 12, and the main piston ejector rod 38 extends out of the main air cylinder shell 12 through the upper opening 30 of the main air cylinder shell; the unidirectional piston sealing ring 28 with unidirectional ventilation is sleeved in the lower groove 11 of the main piston ejector rod 38 and is elastically and hermetically fixed with the lower part of the main piston ejector rod 38, and the unidirectional piston sealing ring 28 moves up and down along with the main piston ejector rod 38 to form a unidirectional piston; the outer wall of the one-way piston sealing ring 28 is elastically contacted with the inner wall of the main inflator housing 12 to play a role in one-way airtight air; the reset spring 27 is arranged in the main inflator shell 12, and two ends of the reset spring 27 are respectively clamped between the bottom of the main piston ejector rod 38 and the elastic ventilation membrane 25; the elastic ventilation membrane 25 is clamped between the thread step 20 at the lower part of the main inflator housing 12 and the ventilation fixing seat 23; the main inflator housing 12 and the ventilation fixing seat 23 are in airtight connection through the threaded fit of the main inflator sealing ring 22; the middle of the elastic ventilation membrane 25 is provided with a ventilation hole 13, and large ventilation holes 24 are uniformly distributed around the ventilation hole 13, and the diameter of the large ventilation holes 24 is about 3 mm; the center of the ventilation fixing seat 23 is provided with a ventilation adjusting nut 17, and the ventilation adjusting nut 17 is in air-tight connection with the ventilation fixing seat 23 through a ventilation adjusting sealing ring 16 in a threaded fit manner; a main ventilation gap 18 of 0.2 to 1.5 mm exists between the central area of the lower surface 19 of the elastic ventilation membrane and the upper end surface 14 of the ventilation adjusting nut 17, and the size of the main ventilation gap 18 can be adjusted by rotating the ventilation adjusting nut 17; a hexagonal ventilation through hole 15 is formed in the center of the ventilation adjusting nut 17, and the ventilation adjusting nut 17 can be rotated by an inner hexagonal wrench, so that the size of a main ventilation gap 18 is adjusted; the large vent hole 24 and the main vent gap 18 and the vent through hole 15 form a large vent passage; the supporting sleeve 7 is positioned at the middle position inside the main piston ejector rod 38 and is fixedly connected with the main piston ejector rod 38 through the countersunk head screw 9; the locking swing piece rotating shaft 37 of the locking swing piece 36 is fixed on the upper part of the supporting sleeve 7 through a through hole on the supporting sleeve 7; the fork rod pin 4 is fixed at the upper part of the fork rod 5 of the swinging piece, the fork rod pin 4 is positioned in the swinging chute 3 of the locking swinging piece 36, and the locking swinging piece 36 can generate corresponding swinging by moving the fork rod 5 of the swinging piece up and down; a part of the locking swing piece 36 is positioned in the upper fork groove 35 of the swing piece fork 5 and can slide in the fork groove 35; the swing plate fork rod 5 is positioned in the positioning through hole 6 of the supporting sleeve 7 and can slide up and down along the positioning through hole 6; the lower part of the swing plate fork rod 5 is provided with internal threads, and is in matched connection with the external threads on the upper part of the secondary piston ejector rod 8 of the secondary piston 10, so that the total length of the secondary piston ejector rod 8 and the swing plate fork rod 5 can be adjusted through threads; the secondary piston sealing ring 29 is sleeved on a groove of the secondary piston 10, is hermetically fixed with the secondary piston 10 and moves together with the secondary piston 10; the secondary piston sealing ring 29 is elastically contacted with the inner wall of the main piston ejector rod 38 to play a role in sealing air; the secondary return spring 31 is positioned in the main piston ejector rod 38, and two ends of the secondary return spring 31 are respectively clamped between the bottom of the support sleeve 7 and the secondary piston 10; a sleeve bolt opening 34 is formed in the support sleeve 7 at a position corresponding to the swing piece bolt 33 for locking the swing piece 36, and the swing piece bolt 33 can extend out of the support sleeve 7 through the sleeve bolt opening 34; a main piston ejector rod spring bolt opening 32 is formed in the main piston ejector rod 38 at a position corresponding to the swing piece spring bolt 33 for locking the swing piece 36, and the swing piece spring bolt 33 can extend out of the main piston ejector rod through the main piston ejector rod spring bolt opening 32.
The inflator fixing seat 2-1 is sleeved at the bottom of the main inflator housing 12 of the buffer type inflator assembly 2-2, the buffer type inflator assembly 2-2 is prevented from moving downwards, and a through hole is formed in the bottom of the inflator fixing seat 2-1 and is used for ventilation and a tool rotation ventilation adjusting nut 17 is convenient to use. The buffer type air cylinder assembly 2-2 can rotate in the air cylinder fixing seat 2-1 along the axial direction of the buffer type air cylinder assembly 2-2 to select the most suitable rolling direction of the bearing 1.
The auxiliary fixing seat 2-3 is sleeved on the upper part of the main air cylinder shell 12 of the buffer air cylinder assembly 2-2 and is tightly matched with the main air cylinder shell 12 of the buffer air cylinder assembly 2-2, so that the buffer air cylinder assembly 2-2 is fixed and supported.
The auxiliary positioning seat 2-4 is sleeved outside the main piston ejector rod 38 of the buffer type inflator assembly 2-2 and is in loose fit with the main piston ejector rod 38 of the buffer type inflator assembly 2-2, so that the main piston ejector rod 38 can slide up and down freely in the axial direction in the through hole of the auxiliary positioning seat 2-4, one side of the through hole of the auxiliary positioning seat 2-4 is provided with the abdicating groove 2-6, the spring bolt 33 extending out of the swinging piece can pass through freely, and the auxiliary positioning seat 2-4 can not block the spring bolt 33 of the swinging piece.
The inclined stop block 2-5 is arranged right above the main piston mandril 38 of the buffer type inflator assembly 2-2 in the axial direction.
In the implementation of the invention, one or two of the auxiliary fixing seat 2-3, the auxiliary positioning seat 2-4 and the inclined surface stop block 2-5 can be selectively used according to actual use occasions, and not all the auxiliary fixing seat, the auxiliary positioning seat and the inclined surface stop block are used.
The invention has the advantages of simple structure, convenient use and suitability for various opening and closing type and translation doors. The buffer type door leaf anti-pinch device has the advantages that the resistance of the buffer type door leaf anti-pinch device can be adjusted pertinently according to the closing speed of the door leaf, so that door leaf pinching accidents are prevented. If the speed of closing the door leaf is low, the buffer door leaf anti-pinch device has small resistance even if the door leaf is clamped to hands and cannot cause injury, and the door can be easily closed; when the door leaf is closed at a high speed and a clamping accident is possibly caused, the buffer type door leaf anti-clamping device automatically increases the resistance of closing the door leaf, so that the closing speed of the door leaf is reduced when the door is closed; when the speed of closing the door leaf is particularly high, the buffer type door leaf anti-pinch device can directly block the door leaf from being closed, and the occurrence of accidents of door leaf pinching is effectively prevented.
Drawings
FIG. 1 is a schematic view of the present invention, not including an auxiliary positioning seat and a bevel stop, in which a buffer type inflator assembly is in a reset state.
Fig. 2 is a schematic top view of the structure of fig. 1.
Fig. 3 is a schematic bottom view of the structure of fig. 1.
FIG. 4 is a schematic view of the vent portion of the cushioned inflator assembly of the present invention with a flexible vent membrane.
FIG. 5 is a schematic structural view of the vent portion of the cushioned inflator assembly of the present invention, excluding the elastomeric vent membrane.
FIG. 6 is a schematic cross-sectional view of the cushion-type inflator assembly of the present invention in a locked condition, wherein the elastic vent membrane is in a closed fit with the upper end surface of the vent adjustment nut, the secondary piston is in a compressed condition, the wobble plate locking tongue is in a locked position, and the secondary piston, 17, the vent adjustment nut, 25, the elastic vent membrane, 33, the wobble plate locking tongue are shown in the figure.
Fig. 7 is a schematic cross-sectional view of the cushion-type inflator assembly of the present invention in a fully compressed state, with the swing blade lock tongue in the reset position and 33 in the drawings.
FIG. 8 is a schematic diagram of the principle of operation of the main piston ram of the cushion cylinder assembly of the present invention in a low speed (1-3 cm/s) downward motion with the swing blade lock tongue in the reset position. 33. Swing the blade lock tongue, 38. The main piston ejector pin.
FIG. 9 is a schematic diagram of the principle of operation of the main piston rod of the cushion-type inflator assembly of the present invention in a downward motion at moderate speed (3-5 cm/s), wherein the elastic vent membrane is deformed downward, the main vent gap is narrowed, but the elastic vent membrane is not sealed against the upper end surface of the vent adjustment nut, and the venting capacity of the large vent channel is reduced but still kept smooth. In the figure, 14, the upper end face of the ventilation adjusting nut, 17, the ventilation adjusting nut, 18, the main ventilation gap, 19, the lower surface of the elastic ventilation diaphragm, 25, the elastic ventilation diaphragm and 1-2, the large ventilation channel.
FIG. 10 is a schematic diagram of the working principle of the main piston rod of the buffer inflator assembly of the present invention when the main piston rod moves downward at high speed (5-50 cm/s), the elastic ventilation membrane and the upper end surface of the ventilation adjusting nut are in a fitting and sealing state, the secondary piston is in a compression state, and the large ventilation channel is closed. In the figure, 10, a secondary piston, 17, a ventilation adjusting nut, 25, an elastic ventilation diaphragm.
FIG. 11 is a table showing the correspondence between the movement speed of the master piston ram and the resistance experienced by the master piston ram of the cushioned inflator assembly of the present invention, with the resistance experienced by the master piston ram increasing rapidly when the movement speed of the master piston ram is greater than the start speed threshold; when the velocity of movement of the master piston ram decreases and the air pressure in the lower cavity 26 is less than the relief pressure threshold, the resistance experienced by the master piston ram decreases rapidly.
FIG. 12 is a schematic view of a combination of components of the present invention, shown in FIG. 2-1, a cartridge holder, 2-2, a cushion cartridge assembly, 2-3, an auxiliary holder, 2-4, an auxiliary positioning seat, 2-5, a bevel stop, and 2-6, a relief groove for the auxiliary positioning seat.
FIG. 13 is a schematic cross-sectional view of a combination of parts of the present invention, shown in FIG. 2-1, a cartridge holder, 2-2, a cushioned cartridge assembly, 2-3, an auxiliary holder, 2-4, an auxiliary positioning seat, 2-5, a bevel stop, and 2-6, a relief groove for the auxiliary positioning seat.
Fig. 14 is a schematic structural view of an embodiment of the present invention.
Fig. 15 is a schematic view illustrating an operating state of the embodiment of the present invention shown in fig. 14 in an activated state.
Fig. 16 is a schematic view showing an operation state in which the embodiment shown in fig. 14 is in a locked state according to the present invention.
Fig. 17 is a schematic structural view of another embodiment of the present invention.
Fig. 18 is a partially enlarged schematic construction view of the embodiment of the present invention shown in fig. 17.
Fig. 19 is a schematic view showing an operation state in which the embodiment shown in fig. 17 is in a locked state according to the present invention.
Fig. 20 is a schematic structural view of a third embodiment of the present invention.
Fig. 21 is a partially enlarged schematic construction view of the embodiment of the present invention shown in fig. 17.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings.
As shown in fig. 1 to 13, the present invention is composed of a buffer type inflator assembly 2-2 with locking means, the compression resistance of which is automatically adjusted according to the compression speed, and an auxiliary fixing seat 2-3 or an inclined stop block 2-5 and an auxiliary positioning seat 2-4 for the inflator fixing seat 2-1.
As shown in fig. 1, the buffer type inflator assembly 2-2 comprises a main piston ejector rod 38 capable of moving up and down, a bearing 1 and a bearing shaft 2 for fixing the bearing are arranged on the upper part of the main piston ejector rod 38, and the bearing 1 slightly protrudes from the upper edge of the main piston ejector rod 38; the main air cylinder shell 12 is sleeved outside the main piston ejector rod 38, the lower piston of the main piston ejector rod 38 can move up and down along the inner wall of the main air cylinder shell 12, and the main piston ejector rod 38 extends out of the main air cylinder shell 12 through the upper opening 30 of the main air cylinder shell; the unidirectional piston sealing ring 28 with unidirectional ventilation is sleeved in the lower groove 11 of the main piston ejector rod 38 and is elastically and hermetically fixed with the lower part of the main piston ejector rod 38, and the unidirectional piston sealing ring 28 moves up and down along with the main piston ejector rod 38 to form a unidirectional piston; the outer wall of the one-way piston sealing ring 28 is elastically contacted with the inner wall of the main inflator housing 12 to play a role in one-way airtight air; the reset spring 27 is arranged in the main inflator shell 12, and two ends of the reset spring 27 are respectively clamped between the bottom of the main piston ejector rod 38 and the elastic ventilation membrane 25; the elastic ventilation membrane 25 is clamped between the thread step 20 at the lower part of the main inflator housing 12 and the ventilation fixing seat 23; the main inflator housing 12 and the ventilation fixing seat 23 are in airtight connection through the threaded fit of the main inflator sealing ring 22; the middle of the elastic ventilation membrane 25 is provided with a ventilation hole 13, and large ventilation holes 24 are uniformly distributed around the ventilation hole 13, and the diameter of the large ventilation holes 24 is about 3 mm; the center of the ventilation fixing seat 23 is provided with a ventilation adjusting nut 17, and the ventilation adjusting nut 17 is in air-tight connection with the ventilation fixing seat 23 through a ventilation adjusting sealing ring 16 in a threaded fit manner; a main ventilation gap 18 of 0.2 to 1.5 mm exists between the central area of the lower surface 19 of the elastic ventilation membrane and the upper end surface 14 of the ventilation adjusting nut 17, and the size of the main ventilation gap 18 can be adjusted by rotating the ventilation adjusting nut 17; a hexagonal ventilation through hole 15 is formed in the center of the ventilation adjusting nut 17, and the ventilation adjusting nut 17 can be rotated by an inner hexagonal wrench, so that the size of a main ventilation gap 18 is adjusted; the large vent hole 24 and the main vent gap 18 and the vent through hole 15 form a large vent passage; the supporting sleeve 7 is positioned at the middle position inside the main piston ejector rod 38 and is fixedly connected with the main piston ejector rod 38 through the countersunk head screw 9; the locking swing piece rotating shaft 37 of the locking swing piece 36 is fixed on the upper part of the supporting sleeve 7 through a through hole on the supporting sleeve 7; the fork rod pin 4 is fixed at the upper part of the fork rod 5 of the swinging piece, the fork rod pin 4 is positioned in the swinging chute 3 of the locking swinging piece 36, and the locking swinging piece 36 can generate corresponding swinging by moving the fork rod 5 of the swinging piece up and down; a part of the locking swing piece 36 is positioned in the upper fork groove 35 of the swing piece fork 5 and can slide in the fork groove 35; the swing plate fork rod 5 is positioned in the positioning through hole 6 of the supporting sleeve 7 and can slide up and down along the positioning through hole 6; the lower part of the swing plate fork rod 5 is provided with internal threads, and is in matched connection with the external threads on the upper part of the secondary piston ejector rod 8 of the secondary piston 10, so that the total length of the secondary piston ejector rod 8 and the swing plate fork rod 5 can be adjusted through threads; the secondary piston sealing ring 29 is sleeved on a groove of the secondary piston 10, is hermetically fixed with the secondary piston 10 and moves together with the secondary piston 10; the secondary piston sealing ring 29 is elastically contacted with the inner wall of the main piston ejector rod 38 to play a role in sealing air; the secondary return spring 31 is positioned in the main piston ejector rod 38, and two ends of the secondary return spring 31 are respectively clamped between the bottom of the support sleeve 7 and the secondary piston 10; a sleeve bolt opening 34 is formed in the support sleeve 7 at a position corresponding to the swing piece bolt 33 for locking the swing piece 36, and the swing piece bolt 33 can extend out of the support sleeve 7 through the sleeve bolt opening 34; a main piston ejector rod spring bolt opening 32 is formed in the main piston ejector rod 38 at a position corresponding to the swing piece spring bolt 33 for locking the swing piece 36, and the swing piece spring bolt 33 can extend out of the main piston ejector rod through the main piston ejector rod spring bolt opening 32.
The inflator fixing seat 2-1 is sleeved at the bottom of the main inflator housing 12 of the buffer type inflator assembly 2-2, so that the buffer type inflator assembly 2-2 is prevented from moving downwards, and a through hole is formed at the bottom of the inflator fixing seat 2-1 for ventilation and a tool rotation ventilation adjusting nut 17 is convenient to use. The buffer type air cylinder assembly 2-2 can rotate in the air cylinder fixing seat 2-1 along the axial direction of the buffer type air cylinder assembly 2-2 to select the most suitable rolling direction of the bearing 1.
Under the condition that no external force acts, if the buffer type air cylinder assembly 2-2 is in a compressed state, the main piston ejector rod 38 and the supporting sleeve 7 move upwards under the action of the return spring 27, the one-way piston sealing ring 28 is in a one-way ventilation state, at the moment, part of air accumulated in the cavity inside the main air cylinder shell 12 at the upper part of the one-way piston sealing ring 28 is discharged out of the main air cylinder shell 12 through a gap between the main piston ejector rod 38 and the upper opening 30 of the main air cylinder shell 12, and the other part of air enters the lower cavity 26 at the lower part of the one-way piston sealing ring 28 through the opened one-way piston sealing ring 28; air outside the main air cylinder housing 12 passes through the hexagonal vent hole 15 in the middle of the vent adjustment nut 17, and then passes through the large vent hole 24 and the vent hole 13 of the elastic vent membrane 25 to enter the lower cavity 26 inside the main air cylinder housing 12. At this time, the air flows through the channel smoothly, the air compression resistance is negligible, and the main piston ejector rod 38 finally stretches out of the main inflator housing 12 to the greatest extent under the action of the return spring 27, so that the return is completed; meanwhile, as no air pressure exists in the lower cavity 26, the secondary return spring 31 is reset, and the swing piece lock tongue 33 is retracted into the main piston ejector rod. The reset state is shown in fig. 1.
After the reset is completed, under the condition that external force acts on the bearing 1 of the main piston ejector rod 38, downward external force components along the axial direction of the main piston ejector rod 38 drive the main piston ejector rod 38 to move downwards, and the one-way piston sealing ring 28 enters a closed state. According to the difference of the movement speed, three situations are described:
1. as shown in fig. 8, the master piston ram 38 moves downward, but at a slower rate, such as 1-3 cm/s. The air in the lower cavity 26 inside the main cartridge housing 12 is compressed and moves in the direction of arrows 1-3. The compressed air is largely discharged outside the cartridge through the large vent passage formed by the large vent hole 24 and the main vent gap 18 shown by the arrow 1-2, and the very small portion of the compressed air is discharged outside the cartridge through the vent passage formed by the vent hole 13 shown by the arrow 1-1. At this time, the air discharge channel is very smooth, the air pressure in the lower cavity 26 is very small, the air resistance applied to the main piston ejector rod 38 when moving downwards is small, and only the return force of the return spring 27 is applied, so that the main piston ejector rod can move downwards easily; at the same time, because the air pressure inside the lower cavity 26 is small, the swing blade lock tongue 33 is held inside the main piston rod 38. Eventually, under external force, the master piston ram 38 may move downward until the cushion-type cartridge assembly is in a fully compressed state, as shown in fig. 7.
2. As shown in fig. 9, the master piston ram 38 moves downward, but at a relatively high rate, such as 3-5 cm/s. The air in the lower cavity 26 inside the main cartridge housing 12 is compressed relatively quickly and moves in the direction of arrows 1-3. The relatively rapidly compressed air pushes the elastic vent membrane 25 slightly downward to narrow the main vent gap 18 between the central region of the lower surface 19 of the elastic vent membrane 25 and the upper end surface 14 of the vent adjustment nut 17, so that the large vent passage vent capacity, indicated by arrows 1-2, formed by the large vent hole 24 and the main vent gap 18 is reduced but still remains clear, the air pressure of the lower cavity 26 begins to become greater, and the resistance to downward movement of the main piston ram 38 is also slightly increased; and because the air pressure within the lower cavity 26, although increased, is still insufficient to push the secondary piston 10 into sufficient motion, the flap lock tongue 33 remains within the primary piston ram 38. Eventually, under external force, the master piston ram 38 may move downward until the cushion-type cartridge assembly is in a fully compressed state, as shown in fig. 7.
3. As shown in fig. 6 and 10, the primary piston ram 38 moves downwardly, but initially at a relatively high rate of movement, such as 5-50 cm/s. The air in the lower cavity 26 inside the main air cylinder housing 12 is strongly compressed and presses the elastic ventilation diaphragm 25 in the direction of the arrow 1-3 to deform it downward to become large, so that the main ventilation gap 18 between the central area of the lower surface 19 of the elastic ventilation diaphragm 25 and the upper end surface 14 of the ventilation adjusting nut 17 becomes narrower, the air discharge capacity of the large ventilation passage formed by the large ventilation hole 24 and the main ventilation gap 18 is further reduced, and the air flow rate through the main ventilation gap 18 is increased. If the air compression speed of the lower cavity 26 inside the main air cylinder housing 12 is continuously greater than the air discharge speed, the central area of the lower surface 19 of the elastic ventilation diaphragm 25 is fitted with the upper end surface 14 of the ventilation adjusting nut 17 and the large ventilation passage 18 is completely closed by the double action of the negative pressure formed by the lower pressure of the compressed air of the lower cavity 26 and the rapid flow air current flowing through the main ventilation gap 18. Once the large ventilation channel is closed, the air displacement is suddenly reduced, and the air pressure of the lower cavity 26 is multiplied under the condition that the air compression speed of the lower cavity 26 is kept unchanged, so that the central area of the lower surface 19 of the elastic ventilation membrane 25 is completely attached to the upper end surface 14 of the ventilation adjusting nut 17, and the closing of the large ventilation channel is more consolidated. As shown in fig. 10, the main ventilation gap 18 is fully closed. Once the main vent gap 18 is completely closed, the compressed air can only be slowly discharged outside the air cylinder through the air release passage 1-1 formed by the air release hole 13, the air discharge passage is suddenly reduced, the air pressure of the lower cavity 26 is rapidly increased, the resistance to downward movement of the main piston rod 38 also rapidly becomes large, and the downward movement speed of the main piston rod 38 is continuously reduced. Meanwhile, as the air pressure of the lower cavity 26 is rapidly increased, the air pressure pushes the secondary piston 10 to move upwards in the direction of the arrows 1-4, so that the fork rod pin 4 at the upper part of the fork rod 5 pushes the swing piece fork rod 5 to move upwards, the swing chute 3 of the locking swing piece 36 enables the locking swing piece 36 to swing towards the direction of the main piston rod bolt opening 32, and finally the swing piece bolt 33 of the locking swing piece 36 extends out of the main piston rod bolt opening 32. In the case where the swing piece lock tongue 33 extends outside the main piston rod lock tongue opening 32, if the main piston rod 38 continues to move downward, the extended swing piece lock tongue 33 collides with the upper end surface of the main cylinder housing 12, thereby preventing the main piston rod 38 from continuing to move downward, as shown in the state of fig. 6. After the main piston ejector rod 38 stops moving, the air pressure of the lower cavity 26 is not increased any more, the air of the lower cavity 26 is slowly discharged through the air discharge hole 13, the compressed air of the lower cavity 26 is finally discharged slowly, the air pressure of the lower cavity 26 is gradually reduced, the secondary piston 10 is reset under the action of the secondary reset spring 31, the secondary piston ejector rod 8 drives the swing piece fork rod 5, the swing piece fork rod 5 drives the locking swing piece 36 again, so that the swing piece spring bolt 33 is retracted into the main piston ejector rod spring bolt opening 32, and at the moment, the main piston ejector rod 38 can continue to move downwards until the buffer type inflator assembly is in a full compression state, as shown in fig. 7.
The elastic ventilation membrane 25 may be made of a silicone material or a rubber material having a thickness of 0.3-2 mm.
The size of the aperture of the vent hole 13 is inversely related to the downward movement resistance of the main piston rod 38 after the large vent passage is closed, and the smaller the aperture of the vent hole 13 is, the slower the venting is, and the larger the downward movement resistance of the main piston rod 38 is. The aperture of the vent hole 13 is typically between 0.05 mm and 0.5 mm, depending on design requirements.
As shown in fig. 11, the process in which the main ventilation gap 18 is completely closed is a positive feedback process. The value of the downward movement speed of the main piston ram 38 immediately after the main vent gap 18 begins to be completely closed is referred to as the start speed threshold of the cushion gas cylinder assembly 2-2; the pressure value at which the air pressure in the lower cavity 26 is released just below the deformation elastic force of the elastic ventilation diaphragm 25 and the main ventilation gap 18 is just opened after the closing is called a release pressure threshold. When the velocity of the downward movement of the primary piston ram 38 once exceeds the start velocity threshold, the primary vent gap 18 is rapidly and completely closed. Once the closing is completed, the air pressure in the lower cavity 26 increases rapidly, several times the air pressure before the main vent gap 18 is completely closed, further enhancing the closing of the main vent gap 18, and the resistance to downward movement of the main piston ram 38 also increases rapidly. After closing, the large vent passage is re-opened only if the air pressure in the lower cavity 26 is less than the release pressure threshold. Once the large vent passage is opened, the air pressure in the lower cavity 26 is rapidly released, the large vent passage is immediately fully opened, and the resistance to downward movement of the main piston ram 38 is rapidly reduced.
The rotary vent adjustment nut 17 may be used to adjust the size of the main vent gap 18 between the central region of the lower surface 19 of the flexible vent membrane 25 and the upper end surface 14 of the vent adjustment nut 17 to adjust the amount of downward movement of the main piston ram 38 just before the main vent gap 18 is completely closed, i.e., the actuation speed threshold of the cushion type air cylinder assembly 2-2. The main vent gap 18 is large, the starting speed threshold is also large, and the main vent gap 18 can be completely closed only when the downward movement speed of the main piston ejector rod 38 is correspondingly large; the main vent gap 18 is small and the start speed threshold is small, and the main vent gap 18 can be completely closed when the downward movement speed of the main piston rod 38 is correspondingly small. After the downward movement speed of the main piston rod 38 exceeds the starting speed threshold of the buffer type air cylinder assembly 2-2, the main ventilation gap 18 is completely closed, and the downward movement resistance of the main piston rod 38 of the buffer type air cylinder assembly 2-2 is suddenly increased, so that the movement speed of the main piston rod 38 is forced to be reduced.
The return spring 27 is a lightweight spring with a small elastic coefficient, and only needs to overcome the friction force of the elastic contact between the outer wall of the one-way piston sealing ring 28 and the inner wall of the main inflator housing 12 during the return, and the elastic force is enough to complete the return. During compression, the spring force of the return spring 27 is negligible compared to the air pressure experienced by the primary piston ram 38 after the primary vent gap 18 is fully closed.
The secondary return spring 31 has a relatively large spring rate, and the air pressure before the main ventilation gap 18 is completely closed does not compress the secondary return spring 31, and only the air pressure after the main ventilation gap 18 is completely closed compresses the secondary return spring 31, thereby moving the secondary piston 10.
In summary, when the buffer door leaf anti-pinch device is not acted by external force, the main piston ejector rod 38 automatically stretches out under the action of the return spring, so that the return is completed. When the main piston ejector rod 38 is moved downwards under the action of external force during closing, if the movement speed is small, the resistance is small during movement, and the main piston ejector rod 38 can move downwards without effort, so that the door can be closed easily. If the speed of movement is high and exceeds a preset starting speed threshold value, the resistance applied during movement will suddenly increase, and the swing piece lock tongue 33 of the swing piece 36 extends out of the main piston rod lock tongue opening 32. The greater resistance forces the speed of movement of the master piston ram 38 to decrease to a lower level. When the movement speed of the main piston ejector rod 38 is reduced, after the air pressure of the lower cavity 26 is smaller than the release pressure threshold, the main ventilation gap 18 is opened, the air pressure of the lower cavity 26 is suddenly reduced, the movement resistance of the main piston ejector rod 38 is reduced, and meanwhile, the swing piece lock tongue 33 of the swing piece 36 is retracted into the main piston ejector rod 38, so that the door leaf can be smoothly closed; if the door is closed at a very high speed, the resistance of the main ram 38 still cannot reduce the closing speed of the door to a safe speed (e.g., less than 2 cm/s), the air in the lower cavity 26 continues to maintain a high pressure, and the latch 33 extending out of the main ram latch opening 32 prevents continued movement of the main ram 38, as shown in the state of fig. 6, thereby directly blocking the closing of the door. After the door leaf is blocked by the main piston ejector rod spring bolt 33 to stop moving, the air pressure of the lower cavity 26 starts to be reduced until the spring bolt 33 is retracted into the main piston ejector rod spring bolt opening 32, and the door leaf can be smoothly closed.
As shown in fig. 12 and 13, the auxiliary fixing base 2-3 is sleeved on the upper part of the main air cylinder housing 12 of the buffer air cylinder assembly 2-2, and is tightly matched with the main air cylinder housing 12 of the buffer air cylinder assembly 2-2, so as to fix and support the buffer air cylinder assembly 2-2. The auxiliary positioning seat 2-4 is sleeved outside the main piston ejector rod 38 of the buffer type inflator assembly 2-2 and is in loose fit with the main piston ejector rod 38 of the buffer type inflator assembly 2-2, so that the main piston ejector rod 38 can axially and freely slide up and down in the through hole of the auxiliary positioning seat 2-4, one side of the through hole of the auxiliary positioning seat 2-4 is provided with the abdicating groove 2-6, the swing piece lock tongue 33 can freely pass through, and the auxiliary positioning seat 2-4 can not block the swing piece lock tongue 33. The inclined stop block 2-5 is arranged right above the main piston ejector rod 38 of the buffer type inflator assembly 2-2 axially. In the implementation of the invention, one or two of the auxiliary fixing seat 2-3, the auxiliary positioning seat 2-4 and the inclined surface stop block 2-5 can be selectively used according to actual use occasions, and not all the auxiliary fixing seat, the auxiliary positioning seat and the inclined surface stop block are used.
Embodiment 1 of an embodiment of the invention for an openable door leaf:
as shown in fig. 14 and 16, the buffer door leaf anti-pinch device is mounted on the lower side surface of the upper door frame 3-4, and the buffer air cylinder assembly 2-2 is fixedly mounted on the upper door frame 3-4 through the air cylinder fixing seat 2-1 and the auxiliary fixing seat 2-3, so that the bearing shaft 2 of the bearing 1 is perpendicular to the lower surface of the upper door frame 3-4 during mounting. When the door leaf 3-3 is closed to leave a certain gap 3-5, the door leaf 3-3 contacts with the bearing 1 of the main plunger rod 38 of the cushion type air cylinder assembly 2-2 and performs compression movement on the cushion type air cylinder assembly 2-2.
If the kinetic energy of the door leaf 3-3 when closed is smaller and the speed is lower, the movement speed of the main piston ejector rod 38 is also slower and is lower than the starting speed threshold of the buffer type inflator 2-2, and the buffer type door leaf anti-pinch device keeps smaller resistance, so that the door leaf can be easily closed.
If the kinetic energy of the door leaf 3-3 when closed is large, the speed is fast, the movement speed of the main piston ejector rod 38 is also fast, once the movement speed is larger than the starting speed threshold of the buffer type inflator assembly 2-2, the resistance of the buffer type door leaf anti-pinch device suddenly becomes large, and meanwhile the swing piece lock tongue 33 of the swing piece 36 extends out of the main piston ejector rod lock tongue opening 32. The suddenly increasing resistance forces the movement speed of the main ram 38 to decrease, and also the closing speed of the door leaf 3-3 to decrease. If the movement speed of the main piston ram 38 is reduced to a lower level (less than 2 cm/s) and the air pressure of the lower cavity 26 is below the release pressure threshold, the main ventilation gap 18 is opened, the air pressure of the lower cavity 26 is suddenly reduced, the movement resistance of the main piston ram 38 is reduced, and meanwhile, the swing piece lock tongue 33 of the swing piece 36 is retracted into the main piston ram 38 because of the reduced air pressure of the lower cavity 26, at this time, the closing speed of the door leaf is reduced to a safer speed, the door leaf can be smoothly closed, and even if a hand is clamped, the door leaf cannot cause a clamping accident. If the kinetic energy of the door leaf 3-3 when closing is large and the speed is too high, the resistance of the buffer type inflator assembly 2-2 still cannot reduce the movement speed of the main piston ejector rod 38 to a lower level (less than 2 cm/s), and the closing speed of the door leaf is still large, the spring bolt 33 extending out of the spring bolt opening 32 of the main piston ejector rod can prevent the main piston ejector rod 38 from continuing to move, thereby preventing the door leaf from continuing to close, ensuring enough safety gap 3-10 is left between the door leaf 3-3 and the door frame, and preventing the occurrence of door leaf clamping accidents.
When the door leaf is opened, the blocking of the door leaf is avoided, and the main piston ejector rod 38 of the buffer type door leaf anti-pinch device automatically resets and stretches out under the action of the return spring 27 so as to be ready for the next starting.
The starting gap 3-5 of the buffer type door leaf anti-pinch device when being started can be adjusted by adjusting the left and right positions of the buffer type door leaf anti-pinch device when the upper door frame 3-4 is installed, if the installation position is moved in the direction of an arrow 3-1, the starting gap 3-5 of the buffer type door leaf anti-pinch device and the safety gap 3-10 are correspondingly large, if the installation position is moved in the direction of an arrow 3-2, the starting gap 3-5 of the buffer type door leaf anti-pinch device and the safety gap 3-10 are correspondingly smaller.
Another embodiment of the invention for an embodiment of a door leaf
As shown in fig. 17 and 19, the buffer door anti-pinch device is mounted on the upper edge of the door 3-3, and the buffer air cylinder assembly 2-2 is fixedly mounted on the door 3-3 through the air cylinder fixing seat 2-1 and the auxiliary positioning seat 2-4. When in installation, the bearing shaft 2 of the bearing 1 is parallel to the upper edge of the door leaf 3-3; the main piston rod spring bolt opening 32 faces the direction of the abdicating groove 2-6 of the auxiliary positioning seat 2-4 so as to prevent the auxiliary positioning seat 2-4 from blocking the swing piece spring bolt 33 when the swing piece spring bolt 33 stretches out. The inclined stop block 2-5 is mounted on the door frame 3-4 corresponding to the axial position of the main piston rod 38 of the buffer type inflator assembly 2-2. When the door leaf 3-3 is closed to leave a certain gap 3-5, the inclined stop block 2-5 is contacted with the bearing 1 of the main plunger rod 38 of the buffer door leaf anti-pinch device. The buffer type inflator assembly 2-2 performs a compression motion due to the slope of the slope stopper 2-5.
If the kinetic energy of the door leaf 3-3 when closed is smaller and the speed is lower, the movement speed of the main piston ejector rod 38 is also slower and is lower than the starting speed threshold of the buffer type inflator 2-2, and the buffer type door leaf anti-pinch device keeps smaller resistance, so that the door leaf can be easily closed.
If the kinetic energy of the door leaf 3-3 when closed is large, the speed is fast, the movement speed of the main piston ejector rod 38 is also fast, once the movement speed is larger than the starting speed threshold of the buffer type inflator assembly 2-2, the resistance of the buffer type door leaf anti-pinch device suddenly becomes large, and meanwhile the swing piece lock tongue 33 of the swing piece 36 extends out of the main piston ejector rod lock tongue opening 32. The suddenly increasing resistance forces the movement speed of the main ram 38 to decrease, and also the closing speed of the door leaf 3-3 to decrease. If the movement speed of the main piston ram 38 is reduced to a lower level (less than 2 cm/s) and the air pressure of the lower cavity 26 is below the release pressure threshold, the main ventilation gap 18 is opened, the air pressure of the lower cavity 26 is suddenly reduced, the movement resistance of the main piston ram 38 is reduced, and meanwhile, the swing piece lock tongue 33 of the swing piece 36 is retracted into the main piston ram 38 because of the reduced air pressure of the lower cavity 26, at this time, the closing speed of the door leaf is reduced to a safer speed, the door leaf can be smoothly closed, and even if a hand is clamped, the door leaf cannot cause a clamping accident. If the kinetic energy of the door leaf 3-3 when closing is large and the speed is too high, the resistance of the buffer type inflator assembly 2-2 still cannot reduce the movement speed of the main piston ejector rod 38 to a lower level (less than 2 cm/s), and the closing speed of the door leaf is still large, the spring bolt 33 extending out of the spring bolt opening 32 of the main piston ejector rod can prevent the main piston ejector rod 38 from continuing to move, thereby preventing the door leaf from continuing to close, ensuring enough safety gap 3-10 is left between the door leaf 3-3 and the door frame, and preventing the occurrence of door leaf clamping accidents.
When the door leaf is opened, the inclined stop blocks 2-5 are not blocked, and the main piston ejector rod 38 of the buffer type door leaf anti-pinch device automatically resets and stretches out under the action of the return spring 27, so that preparation is made for the next starting.
The starting gap 3-5 of the buffer type door leaf anti-pinch device when being started can be adjusted by adjusting the left and right positions of the buffer type door leaf anti-pinch device when the door leaf 3-3 is installed, if the installation position is moved in the direction of an arrow 3-1, the starting gap 3-5 of the buffer type door leaf anti-pinch device and the safety gap 3-10 are correspondingly large, if the installation position is moved in the direction of an arrow 3-2, the starting gap 3-5 of the buffer type door leaf anti-pinch device and the safety gap 3-10 are correspondingly smaller.
Embodiment of the invention an embodiment for a sliding door leaf
As shown in fig. 20 and 21, the door leaves 3-6 and 3-7 are mounted on the slide rails 3-8 of the upper door frame 3-9 of the sliding door. The buffer type door leaf anti-pinch device is arranged on one side of the upper edge of the door leaf 3-7, and the buffer type air cylinder translation assembly 2-2 is fixedly arranged on the door leaf 3-7 through the air cylinder fixing seat 2-1 and the auxiliary fixing seat 2-3. When the sliding door is closed, the side surface of the door leaf 3-6 is contacted with the bearing 1 of the main piston ejector rod 38 of the buffering type door leaf anti-pinch device when the door leaf 3-6 is separated from the door leaf 3-7 by a certain starting gap 3-13. The cushion type inflator assembly 2-2 is made to perform a compression motion.
If the kinetic energy of the door leaves 3-6 and 3-7 is smaller and the speed is lower, the movement speed of the main piston ejector rod 38 is also slower and is lower than the starting speed threshold of the buffer type inflator 2-2, and the buffer type door leaf anti-pinch device keeps smaller resistance, so that the door leaf can be easily closed.
If the kinetic energy of the door leaf 3-6 and the door leaf 3-7 when closed is larger, the movement speed of the main piston ejector rod 38 is also fast, once the movement speed is larger than the starting speed threshold of the buffer type inflator assembly 2-2, the resistance of the buffer type door leaf anti-pinch device suddenly increases, and meanwhile the swing piece lock tongue 33 of the swing piece 36 extends out of the lock tongue opening 32 of the main piston ejector rod. The suddenly increasing resistance forces the movement speed of the main ram 38 to decrease and also the speed at which the door leaves 3-6 close with the door leaves 3-7 to decrease. If the movement speed of the main piston ram 38 is reduced to a lower level (less than 2 cm/s) and the air pressure of the lower cavity 26 is below the release pressure threshold, the main ventilation gap 18 is opened, the air pressure of the lower cavity 26 is suddenly reduced, the movement resistance of the main piston ram 38 is reduced, and meanwhile, the swing piece lock tongue 33 of the swing piece 36 is retracted into the main piston ram 38 because of the reduced air pressure of the lower cavity 26, at this time, the closing speed of the door leaf is reduced to a safer speed, the door leaf can be smoothly closed, and even if a hand is clamped, the door leaf cannot cause a clamping accident. If the kinetic energy of the door leaf 3-6 and the door leaf 3-7 are large and the speed is too high, the resistance of the buffer type inflator assembly 2-2 still cannot reduce the movement speed of the main piston ejector rod 38 to a lower level (less than 2 cm/s), and the closing speed of the door leaf 3-6 and the door leaf 3-7 is also large, the lock tongue 33 extending out of the lock tongue opening 32 of the main piston ejector rod can prevent the main piston ejector rod 38 from moving continuously, thereby preventing the door leaf 3-6 and the door leaf 3-7 from continuing to close, ensuring enough gap is left between the door leaf 3-6 and the door leaf 3-7, and preventing the occurrence of a door leaf clamping accident.
When the door leaves are opened, the blocking of the door leaves 3-6 is avoided, and the main piston ejector rod 38 of the buffer type door leaf anti-pinch device automatically resets and stretches out under the action of the return spring 27 so as to be ready for the next starting.
Claims (1)
1. The buffer type door leaf anti-pinch device comprises a buffer type inflator assembly (2-2) and an inflator fixing seat (2-1), wherein the buffer type inflator assembly is matched with an auxiliary fixing seat (2-3) or is matched with an inclined surface stop block (2-5) and an auxiliary positioning seat (2-4); the method is characterized in that:
the inflator fixing seat (2-1) is sleeved at the bottom of the main inflator shell (12) of the buffer type inflator assembly (2-2), and a through hole is formed in the bottom of the inflator fixing seat (2-1);
the buffer type inflator assembly (2-2) comprises a main piston ejector rod (38) capable of moving up and down, a bearing (1) and a bearing shaft (2) for fixing the bearing are arranged on the upper part of the main piston ejector rod (38), and the bearing (1) slightly protrudes out of the upper edge of the piston ejector rod (38); the main air cylinder shell (12) is sleeved outside the piston ejector rod (38), a lower piston of the main piston ejector rod (38) can move up and down along the inner wall of the main air cylinder shell (12), and the main piston ejector rod (38) extends out of the main air cylinder shell (12) through an upper opening (30) of the main air cylinder shell; the unidirectional piston sealing ring (28) with unidirectional ventilation is sleeved in the lower groove (11) of the main piston ejector rod (38) and is elastically and hermetically fixed with the lower part of the main piston ejector rod (38); the outer wall of the one-way piston sealing ring (28) is elastically contacted with the inner wall of the main inflator shell (12); the reset spring (27) is arranged in the main inflator shell (12), and two ends of the reset spring (27) are respectively clamped between the bottom of the main piston ejector rod (38) and the elastic ventilation membrane (25); the elastic ventilation membrane (25) is clamped between the thread step (20) at the lower part of the main inflator shell (12) and the ventilation fixing seat (23); the main inflator shell (12) is in airtight connection with the ventilation fixing seat (23) through the threaded fit of the main inflator sealing ring (22); the middle of the elastic ventilation membrane (25) is provided with a ventilation hole (13), and large ventilation holes (24) which are uniformly distributed are arranged around the ventilation hole (13); the middle of the ventilation fixing seat (23) is provided with a ventilation adjusting nut (17), and the ventilation adjusting nut (17) is in air-tight connection with the ventilation fixing seat (23) through a ventilation adjusting sealing ring (16) in a threaded fit manner; a main ventilation gap (18) is formed between the lower surface (19) of the elastic ventilation diaphragm (25) and the upper end surface (14) of the ventilation adjusting nut (17), and the size of the main ventilation gap (18) can be adjusted by rotating the ventilation adjusting nut (17); a hexagonal ventilation through hole (15) is formed in the middle of the ventilation adjusting nut (17); the supporting sleeve (7) is positioned at the middle position inside the main piston ejector rod (38) and is fixedly connected with the main piston ejector rod (38) through a countersunk head screw (9); a locking swing piece rotating shaft (37) of the locking swing piece (36) is fixed on the upper part of the supporting sleeve (7) through a through hole; the fork rod pin (4) is fixed at the upper part of the fork rod (5) of the swinging piece, the fork rod pin (4) is positioned in the swinging chute (3) of the locking swinging piece (36), and the locking swinging piece (36) can swing correspondingly by moving the fork rod (5) of the swinging piece up and down; the locking swing piece (36) is partially positioned in the fork groove (35) at the upper part of the fork rod (5) of the swing piece; the swinging piece fork rod (5) is positioned in the positioning through hole (6) of the supporting sleeve (7) and can slide up and down along the positioning through hole (6); the lower part of the swinging plate fork rod (5) is provided with an internal thread which is matched and connected with the external thread at the upper part of the secondary piston ejector rod (8) of the secondary piston (10); the secondary piston sealing ring (29) is sleeved on a groove of the secondary piston (10) and is hermetically fixed with the secondary piston (10); the secondary piston sealing ring (29) is elastically contacted with the inner wall of the main piston ejector rod (38); the secondary return spring (31) is positioned in the main piston ejector rod (38), and two ends of the secondary return spring (31) are respectively clamped between the bottom of the support sleeve (7) and the secondary piston (10); a sleeve bolt opening (34) is formed in the support sleeve (7) at a position corresponding to a swing piece bolt (33) of the locking swing piece (36); a main piston ejector rod spring bolt opening (32) is arranged at the position of the main piston ejector rod (38) corresponding to the swing piece spring bolt (33);
the auxiliary fixing seat (2-3) is sleeved on the upper part of the main air cylinder shell (12) of the buffer air cylinder assembly (2-2) and is tightly matched with the main air cylinder shell (12) of the buffer air cylinder assembly (2-2);
the auxiliary positioning seat (2-4) is sleeved outside a main piston ejector rod (38) of the buffer type inflator assembly (2-2) and is in loose fit with the main piston ejector rod (38); the inclined surface stop block (2-5) is arranged on a door frame right above the main piston ejector rod (38) of the buffer type inflator assembly (2-2) in the axial direction and is matched with the bearing (1) of the main piston ejector rod (38) in an inclined surface mode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810591103.8A CN110578458B (en) | 2018-06-10 | 2018-06-10 | Buffering type door leaf anti-pinch device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810591103.8A CN110578458B (en) | 2018-06-10 | 2018-06-10 | Buffering type door leaf anti-pinch device |
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| CN110578458A CN110578458A (en) | 2019-12-17 |
| CN110578458B true CN110578458B (en) | 2024-02-02 |
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| CN201810591103.8A Active CN110578458B (en) | 2018-06-10 | 2018-06-10 | Buffering type door leaf anti-pinch device |
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