CN116537659A - Design method of hinge door-closing hydraulic buffer - Google Patents
Design method of hinge door-closing hydraulic buffer Download PDFInfo
- Publication number
- CN116537659A CN116537659A CN202310711102.3A CN202310711102A CN116537659A CN 116537659 A CN116537659 A CN 116537659A CN 202310711102 A CN202310711102 A CN 202310711102A CN 116537659 A CN116537659 A CN 116537659A
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- oil
- piston rod
- cavity
- piston
- oil cylinder
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 239000000872 buffer Substances 0.000 title claims abstract description 30
- 238000004146 energy storage Methods 0.000 claims abstract description 58
- 238000007789 sealing Methods 0.000 claims description 29
- 239000004519 grease Substances 0.000 claims description 4
- 230000001050 lubricating effect Effects 0.000 claims description 4
- 239000003921 oil Substances 0.000 description 247
- 238000013016 damping Methods 0.000 description 8
- 230000001105 regulatory effect Effects 0.000 description 8
- 230000003139 buffering effect Effects 0.000 description 7
- 238000005299 abrasion Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F5/00—Braking devices, e.g. checks; Stops; Buffers
- E05F5/06—Buffers or stops limiting opening of swinging wings, e.g. floor or wall stops
- E05F5/08—Buffers or stops limiting opening of swinging wings, e.g. floor or wall stops with springs
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F3/00—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices
- E05F3/04—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices with liquid piston brakes
- E05F3/12—Special devices controlling the circulation of the liquid, e.g. valve arrangement
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F3/00—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices
- E05F3/20—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices in hinges
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
- E05F5/00—Braking devices, e.g. checks; Stops; Buffers
- E05F5/06—Buffers or stops limiting opening of swinging wings, e.g. floor or wall stops
- E05F5/10—Buffers or stops limiting opening of swinging wings, e.g. floor or wall stops with piston brakes
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
- E05Y2900/00—Application of doors, windows, wings or fittings thereof
- E05Y2900/10—Application of doors, windows, wings or fittings thereof for buildings or parts thereof
- E05Y2900/13—Type of wing
- E05Y2900/132—Doors
Landscapes
- Closing And Opening Devices For Wings, And Checks For Wings (AREA)
Abstract
The design method of the hinge door-closing hydraulic buffer comprises an oil cylinder, a piston rod, an energy storage spring and an oil seal, wherein the oil seal divides an inner cavity of the oil cylinder into an oil-free cavity and an oil-free cavity positioned at the lower side of the oil-free cavity, the piston is positioned in the oil-free cavity, the energy storage spring is positioned in the oil-free cavity, the piston divides the oil-free cavity into an upper oil cavity and a lower oil cavity, an oil passing channel which is communicated with the upper oil cavity and the lower oil cavity is formed on an oil plug rod, an oil valve needle which is capable of adjusting the oil passing quantity of the oil passing channel is arranged in the oil cylinder, the piston is movably arranged on the piston rod, the piston is separated from the piston rod along with the upward movement of the piston rod to form an oil passing gap which is communicated with the upper oil cavity and the lower oil cavity, the valve needle is moved downwards along with the piston rod to adjust the oil passing quantity of the oil passing channel, the rigidity of the energy storage spring is designed to adjust the rotating force of the oil cylinder required by driving the piston rod to move upwards, and the shape and the position of the valve needle are designed to adjust the speed of the downward movement of the piston rod. The invention saves more labor when opening the door, reduces the cost of the buffer, and has simple structure and high practicability.
Description
Technical Field
The invention relates to a design method of a hinge door closing hydraulic buffer, and belongs to the technical field of door closing hydraulic buffers.
Background
Hinge door closing hydraulic buffers, also called closers, hydraulic door closing buffers or hidden closers, are usually installed on doors of large office areas (and commercial merchants, supermarkets and the like) to control the speed of closing the door. The door closer is a hydraulic device which is arranged on a door hinge and is similar to a spring, and is generally a structure of combining the spring and a hydraulic cylinder. When the door is opened, the spring is compressed and stored by the downward movement of the piston rod in the hydraulic cylinder, and when the door is closed, the piston rod is pushed to move downward by the potential energy released by the spring to close the door leaf. A flow regulating valve is arranged in the hydraulic cylinder to control the flow and the flow speed of hydraulic oil, form damping force and regulate the closing speed of the door, so as to prevent the door leaf from suddenly contacting with the door frame when the door is closed, and slow down the collision between the door leaf and the door frame; when the door is opened, the door leaf is pushed by door opening force to drive the piston rod to extend upwards, so that the pressure of an oil cavity in the hydraulic cylinder is changed to jack up a valve on the piston, the piston rod continuously extends upwards to achieve the aim of opening the door, the door leaf is pushed by applying larger force to jack up the valve on the piston when the door is opened, the door closer is labor-saving in use, the internal space of the hydraulic cylinder is small, the flow regulating valve and the valve on the piston are complex in structure, more parts are arranged, the assembly efficiency is low, and the cost of the product is high.
Disclosure of Invention
According to the design method of the hinge door-closing hydraulic buffer, the oil cylinder rotates to drive the piston rod to move upwards, so that the piston and the piston rod are separated to form an oil passing gap, the door opening force is reduced, the door opening force is more labor-saving, the piston is used as a separating sealing piece of the upper oil cavity and the lower oil cavity and is also used as a movable piece for communicating the upper oil cavity and the lower oil cavity when the piston rod moves upwards, the movement characteristics of rapid upward movement and buffering downward movement of the piston rod are realized, the structure in the oil cylinder is simplified, the assembly and the forming are easier, the cost of the buffer is reduced, and the hinge door-closing hydraulic buffer is simple in structure and high in practicability.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the design method of the hinge door-closing hydraulic buffer comprises an oil cylinder, wherein a piston rod which moves along the axial direction along with the rotation of the oil cylinder, a piston which is in sealing fit with the inner wall of the oil cylinder, an energy storage spring which is compressed along with the upward movement of the piston rod, and an oil seal which is in sealing fit with the piston rod and the inner wall of the oil cylinder are arranged in the oil cylinder, the oil seal divides the inner cavity of the oil cylinder into an oil-free cavity and an oil-containing cavity which is positioned at the lower side of the oil-free cavity, the piston is positioned in the oil-containing cavity, the energy storage spring is positioned in the oil-free cavity, and the piston divides the oil-containing cavity into an upper oil cavity and a lower oil cavity, and the design method is characterized in that: the oil piston rod is provided with an oil passing channel which is communicated with the upper oil cavity and the lower oil cavity, a valve needle which can adjust the oil passing quantity of the oil passing channel is arranged in the oil cylinder, the piston is movably arranged on the piston rod, the piston moves upwards along with the piston rod and is separated from the piston rod to form an oil passing gap which is communicated with the upper oil cavity and the lower oil cavity, the valve needle moves downwards along with the piston rod to adjust the oil passing quantity of the oil passing channel, the rigidity of the energy storage spring is designed to adjust the rotating force of the oil cylinder required for driving the piston rod to move upwards, and the shape and the position of the valve needle are designed to adjust the speed of the downward movement of the piston rod.
Preferably, the upper end of the piston rod penetrates through the oil seal to extend into the oil-free cavity to be matched with the energy storage spring, the lower end of the piston rod extends into the oil cavity in a cross shape, the oil passing channel is arranged at the lower end of the piston rod and consists of an axial oil duct arranged along the axial direction and a radial oil duct arranged along the radial direction which are in cross connection, the valve needle extends into the axial oil duct in the oil cavity along the axial direction, and the valve needle is in a multi-section variable-diameter shape with the diameter reduced from top to bottom.
Preferably, the valve needle is composed of a plurality of segments, the diameters of the segments from top to bottom are sequentially reduced, the difference between the diameter of the segment at the uppermost layer and the inner diameter of the axial oil duct is not more than 0.05-0.2 mm, and the difference between the diameters of the adjacent segments is 0.2-0.5 mm.
Preferably, the lower end of the oil cylinder is sealed through a screw plug, the screw plug is matched with the end cover at the lower end of the oil cylinder to extend into the end cover at the lower end of the oil cylinder and is matched with the end cover at the lower end of the oil cylinder to seal, the lower end of the valve needle is a spherical ball end, an arc groove matched with the ball end and arranged along the radial direction is formed in the top surface of the screw plug, the ball end extends into the arc groove, the number of segments in the valve needle, the length of each segment, the diameter difference of the adjacent segments and the axial position of the screw plug at the lower end of the oil cylinder are designed, so that the speed of the piston rod moves downwards from slow speed to fast speed change times and the speed change quantity of the piston rod during each speed change are regulated.
Preferably, the piston comprises a piston body sleeved at the lower end of the piston rod and a contact sealing ring arranged on the piston body, the contact sealing ring is tightly pressed on the inner wall of the oil cylinder, the piston body is in clearance fit with the lower end of the piston rod and the inner wall of the oil cylinder respectively, and the piston body is separated from the piston rod along with the upward movement of the piston rod to form an oil passing gap communicated with the upper oil cavity and the lower oil cavity and is abutted against the piston rod along with the downward movement of the piston rod.
Preferably, the lower end of the piston rod is provided with an annular groove, the annular groove is provided with an elastic retainer ring, the elastic retainer ring is positioned below the piston body and is axially separated from the piston body, the piston body is propped against the elastic retainer ring along with the upward movement of the piston rod, an oil passing gap is formed by separating the piston body from the piston rod, and the axial distance between the piston body and the elastic retainer ring is 0.3-1 mm.
Preferably, an annular positioning groove which is recessed inwards is formed in the piston body, the contact sealing ring is hooped in the annular positioning groove, and lubricating grease is coated in the annular positioning groove.
Preferably, the upper end of the piston rod is fixed with a cross rod which is arranged along the radial direction, the end part of the cross rod penetrates out of the oil cylinder, and a spiral hole for the end part of the cross rod to penetrate out and move is formed in the oil cylinder.
Preferably, a guide post matched with the upper end of the piston rod and a spring matching post matched with the energy storage spring are arranged in the oil cylinder, a matching groove is formed in the lower end of the guide post, the upper end of the piston rod stretches into the matching groove, the upper end of the guide post is in spherical surface shape and contacts with the lower end of the spring matching post, the spring matching post stretches into the energy storage spring, the lower end of the energy storage spring abuts against the spring matching post, the upper end of the energy storage spring abuts against the upper end of the oil cylinder, the guide post is in guide fit with the inner wall of the oil cylinder, the spring matching post is pushed to compress the energy storage spring along with the upward movement of the piston rod, the length of the guide post is designed, and the length of the energy storage spring is adjusted, so that the rigidity of the energy storage spring is designed.
Preferably, the inner wall of the oil cylinder is provided with an annular step surface positioned above the oil seal, the top surface of the oil seal is provided with a spring seat, an oil seal spring is clamped between the spring seat and the annular step surface, the upper end of the piston rod passes through the oil seal, the spring seat and the oil seal spring to be matched with the guide post, and the spring seat and the oil seal spring are respectively in clearance fit with the piston rod.
The invention has the beneficial effects that:
according to the design method of the hinge door closing hydraulic buffer, the oil cylinder is used as a rotating shaft of the door hinge, the oil cylinder is driven to rotate through rotation of the door hinge, so that the piston rod moves in the oil cylinder in the axial direction, the oil cylinder rotates to drive the piston rod to move upwards when the hinge is unfolded, the energy storage spring is compressed, a door opening process is formed, and the energy storage spring drives the piston rod to move downwards through elasticity after the door hinge is unfolded in place, so that the oil cylinder is driven to rotate, the door hinge is folded, and a door closing process is formed; when the door is opened, external force pushes the door hinge to expand, the oil cylinder is driven to rotate, the piston rod moves upwards, at the moment, the piston can be separated from the piston rod to form an oil passing gap for communicating the upper oil cavity and the lower oil cavity, the volume of the upper oil cavity is reduced along with the upward movement of the piston rod, the pressure is increased, the formation of the oil passing gap increases the excessive flow, so that oil can rapidly flow from the upper oil cavity to the lower oil cavity, the oil pressure of the upper oil cavity is rapidly reduced, the piston rod can rapidly move upwards, the aim of rapidly opening the door is fulfilled, the oil cylinder rotates to drive the piston rod to move upwards, the piston and the piston rod are separated to form the oil passing gap, the force required for opening the door is reduced, the door is more labor-saving, the initial rigidity of the energy storage spring is designed to adjust the rotating force required for driving the piston rod to move upwards, and the probability of mistakenly opening the door is reduced under the condition that the external force is smaller; when the door is closed, the energy storage spring pushes the piston rod to move downwards so as to enable the piston rod to be in contact with the piston again, the width of the oil passing gap is reduced to zero, the volume of the lower oil cavity is reduced along with the downward movement of the piston rod, the pressure is increased, oil can only flow from the lower oil cavity to the upper oil cavity through the oil passing channel, at the moment, the valve adjusts the oil passing quantity of the oil passing channel to form damping force for the downward movement of the piston rod, and forms buffering for the downward movement of the piston rod, so that the door hinge is buffered, the door is closed, the oil passing quantity of the oil passing channel in the downward movement process of the piston rod is adjusted through the shape and the position of the valve needle, the speed of the downward movement of the piston rod is adjusted, the purpose of adjusting the door closing speed is achieved, the abrupt contact between the door leaf and the door frame is prevented, and the collision between the door leaf and the door frame is slowed down; the piston is used as a separating sealing piece for the upper oil cavity and the lower oil cavity and a moving piece for communicating the upper oil cavity and the lower oil cavity when the piston rod moves upwards, so that the moving characteristics of the piston rod for rapidly moving upwards and buffering the downward movement are realized, the structure inside the oil cylinder is simplified, the assembly forming is easier, the cost of the buffer is reduced, and the structure is simple and the practicability is high.
Drawings
Fig. 1 is a schematic view of a hinge-door-closing hydraulic buffer in an embodiment.
Fig. 2 is a partial schematic view of a hinge-gate hydraulic damper.
Fig. 3 is a schematic view of the upward movement of the piston rod separated from the piston to form an oil passing gap.
Fig. 4 is a schematic view of the piston rod moving downward against the piston.
Detailed Description
Embodiments of the present invention are described in detail below with reference to fig. 1 to 4.
The design method of the hinge door-closing hydraulic buffer comprises an oil cylinder 1, wherein a piston rod 2 which moves along the axial direction along with the rotation of the oil cylinder 1, a piston 3 which is in sealing fit with the inner wall of the oil cylinder 1, an energy storage spring 4 which is compressed along with the upward movement of the piston rod 2, and an oil seal 5 which is in sealing fit with the piston rod 2 and the inner wall of the oil cylinder 1 are arranged in the oil cylinder 1, the oil seal 5 divides the inner cavity of the oil cylinder 1 into an oil-free cavity and an oil-containing cavity which is positioned at the lower side of the oil-free cavity, the piston 3 is positioned in the oil-containing cavity, the energy storage spring 4 is positioned in the oil-free cavity, and the piston 3 divides the oil-containing cavity into an upper oil cavity A and a lower oil cavity B, and the design method is characterized in that: the oil plug rod 2 is provided with an oil passing channel 6 which is communicated with an upper oil cavity A and a lower oil cavity B, a valve needle 7 which can adjust the oil passing quantity of the oil passing channel 6 is arranged in the oil cylinder 1, the piston 3 is movably arranged on the piston rod 2, the piston 3 is separated from the piston rod 2 along with the upward movement of the piston rod 2 to form an oil passing gap C which is communicated with the upper oil cavity A and the lower oil cavity B, the valve needle 7 is used for adjusting the oil passing quantity of the oil passing channel 6 along with the downward movement of the piston rod 2, the rigidity of the energy storage spring 4 is designed to adjust the rotating force of the oil cylinder 1 required for driving the piston rod 2 to move upwards, and the shape and the position of the valve needle 7 are designed to adjust the downward movement speed of the piston rod 2.
According to the design method of the hinge door closing hydraulic buffer, the oil cylinder 1 is used as the rotating shaft of the door hinge, the oil cylinder 1 is driven to rotate through the rotation of the door hinge, so that the piston rod 2 moves axially in the oil cylinder 1, when the hinge is unfolded, the oil cylinder 1 rotates to drive the piston rod 2 to move upwards, the energy storage spring 4 is compressed, a door opening process is formed, and after the door hinge is unfolded in place, the energy storage spring 4 pushes the piston rod 2 to move downwards through elasticity, so that the oil cylinder 1 is driven to rotate, the door hinge is folded, and a door closing process is formed; when the door is opened, external force pushes the door hinge to expand, the oil cylinder 1 is driven to rotate, the piston rod 2 moves upwards, at the moment, the piston 3 and the piston rod 2 are separated to form an oil passing gap C communicated with the upper oil cavity A and the lower oil cavity B, the volume of the upper oil cavity A is reduced along with the upward movement of the piston rod 2, the pressure is increased, the formation of the oil passing gap C increases the excessive flow, so that the oil rapidly flows from the upper oil cavity A to the lower oil cavity B, the oil pressure of the upper oil cavity A is rapidly reduced, the piston rod 2 can rapidly move upwards, the aim of rapidly opening the door is achieved, the oil cylinder 1 rotates to drive the piston rod 2 to move upwards, the piston 3 and the piston rod 2 are separated to form the oil passing gap C, the force required for opening the door is reduced, the door is opened more labor-saving, the initial rigidity of the energy storage spring is designed to regulate the oil cylinder rotating force required for driving the piston rod to move upwards, and the force required for opening the door is regulated, and the probability of false door opening is reduced under the condition of smaller external force; when the door is closed, the energy storage spring 4 pushes the piston rod 2 to move downwards so as to enable the piston rod 2 to be in contact with the piston 3 again, the width of the oil passing gap C is reduced to zero, the volume of the lower oil cavity A is reduced along with the downward movement of the piston rod 2, the pressure is increased, oil can only flow from the lower oil cavity B to the upper oil cavity A through the oil passing channel 6, at the moment, the valve needle 7 regulates the oil passing quantity of the oil passing channel 6, forms damping force for the downward movement of the piston rod 2, forms buffering closure of a door hinge, realizes buffering door closing, regulates the oil passing quantity of the oil passing channel 6 in the downward movement process of the piston rod 2 by designing the shape and the position of the valve needle 7, regulates the downward movement speed of the piston rod 2, achieves the aim of regulating the door closing speed, prevents abrupt contact between a door leaf and a door frame, and slows down collision between the door leaf and the door frame; the piston 3 is used as a separating sealing piece for the upper oil cavity A and the lower oil cavity and a moving piece for communicating the upper oil cavity A and the lower oil cavity B when the piston rod 2 moves upwards, so that the quick upward movement of the piston rod 2 and the buffering of the downward movement are realized, the structure inside the oil cylinder 1 is simplified, the assembly forming is easier, the cost of the buffer is reduced, and the structure is simple and the practicability is high.
The upper end of the piston rod 2 penetrates through an oil seal to extend into an oil-free cavity to be matched with the energy storage spring 4, the lower end of the piston rod 2 extends into an oil cavity in a cross shape, an oil passing channel 6 is formed in the lower end of the piston rod 2 and consists of an axial oil duct 61 arranged along the axial direction and a radial oil duct 62 arranged along the radial direction in a cross-shaped communication mode, a valve needle 7 extends into the axial oil duct 61 in the oil cavity along the axial direction, and the valve needle 7 is in a multi-section reducing shape with the diameter reduced from top to bottom. As shown in the drawing, the lower end of the piston rod 2 is provided with an oil passing channel 6, an axial oil channel 61 is opened upwards from the bottom surface of the piston rod 2, a radial oil channel 62 is in crisscross communication with the axial oil channel 61 and penetrates the piston rod 2 in the radial direction, the piston rod 2 is not contacted with the inside of the oil cylinder 1, the valve needle 7 stretches into the axial oil channel 61 to limit the oil passing quantity in the axial oil channel 61, the valve needle 7 is in a multi-section reducing shape, the piston rod 2 and the piston 3 are not separated when the piston rod 2 moves downwards, an oil passing gap C is not formed, only the oil passing channel 6 passes oil, the oil quantity flowing from the lower oil cavity B to the upper oil cavity A gradually increases along with the diameter of the downward movement of the valve needle 7 from top to bottom, the damping force of the downward movement of the piston rod gradually decreases from large to small, the closing speed of the door hinge gradually increases from slow to fast, a slow-fast door closing process is formed, and an effective buffer closing door is formed.
The valve needle 7 is composed of a plurality of segments 71, the diameters of the segments 71 are sequentially reduced from top to bottom, the difference between the diameter of the segment 71 at the uppermost layer and the inner diameter of the axial oil duct 61 is not more than 0.05-0.2 mm, and the difference between the diameters of the adjacent segments 71 is 0.2-0.5 mm. The valve needle 7 is composed of a plurality of segments 71, the diameter of the uppermost segment 71 is the largest, the oil passing amount in the axial channel 61 is the smallest through cooperation with the axial channel 61, the downward movement damping force of the formed piston rod 2 is the largest, when the diameter of the downward movement segment 71 of the piston rod 2 is sequentially reduced, the oil passing amount in the axial channel 61 is sequentially increased, the downward movement damping force of the piston rod 2 is sequentially reduced, the downward movement of the piston rod 2 is sequentially accelerated, and a slow-first-then-fast door closing process can be formed.
The lower end of the oil cylinder 1 is sealed through a plug 8, the plug 8 is in threaded fit and extends into an end cover at the lower end of the oil cylinder 1 and is in fit and sealing with the end cover at the lower end of the oil cylinder, the lower end of the valve needle 7 is a spherical ball end 72, an arc groove 81 which is matched with the ball end 72 and is arranged along the radial direction is formed in the top surface of the plug 8, the ball end 72 extends into the arc groove 81, the number of segments 71 in the valve needle, the length of each segment 71, the diameter difference of the adjacent segments 71 and the axial position of the plug 8 at the lower end of the oil cylinder 1 are designed, and therefore the speed change quantity of the piston rod 2 from slow speed to fast speed when the piston rod 2 moves downwards and the speed change quantity of the piston rod 2 when the piston rod 2 changes every time are regulated. The ball end 72 is positioned on the plug 8 by the arc groove 81, and can not move along with the movement of the piston rod 2, and because the cylinder 1 drives the piston rod 2 to move through rotation, and the plug 8 can synchronously rotate along with the cylinder 1, the arc groove 81 and the ball end 72 are matched, so that the arc groove 81 rotates relative to the ball end 72 when the plug 81 rotates, the plug 81 can axially position the valve needle 7, and the valve needle 7 can not be driven to rotate due to the rotation of the cylinder 1, so that the valve needle 7 is ensured to be fixed, and the reliability of the valve needle 7 when the oil passage 6 is adjusted to pass oil is improved. The sealing rings are hooped on the plug 8, the sealing rings are screwed into the lower end cover of the oil cylinder, namely, the sealing rings are contacted with the lower end cover of the oil cylinder to form a seal, the axial position of the plug 8 at the lower end of the oil cylinder 1 can be adjusted in a threaded rotation mode, the axial position of the valve needle 7 can be adjusted, so that the axial position of the uppermost segment 71 relative to the piston rod 2 can be adjusted, the number of segments 71 in the valve needle, the length of each segment 71, the diameter difference of the adjacent segments 71 and the axial position of the plug 8 at the lower end of the oil cylinder 1 are designed according to the application scene and the closing speed requirement of the hinge closing hydraulic buffer, the speed change of the piston rod 2 from slow to fast speed when the piston rod 2 moves downwards and the speed change amount of the piston rod 2 when the piston rod 2 changes every time can be adjusted, the speed of the first half of the closing process can be formed, the axial position of the uppermost segment 71 is at the lowest position in the whole process, the piston rod 71 almost cooperates with the uppermost segment 71 when the piston rod moves downwards when the position is adjusted to the lowest position, and the whole process of the whole process can be slow.
The piston 3 comprises a piston body 31 sleeved at the lower end of the piston rod 2 and a contact sealing ring 32 arranged on the piston body 31, the contact sealing ring 32 is tightly pressed on the inner wall of the oil cylinder 1, the piston body 31 is in clearance fit with the lower end of the piston rod 2 and the inner wall of the oil cylinder 1 respectively, the piston body 31 is separated from the piston rod 2 along with the upward movement of the piston rod 2 to form an oil passing clearance C communicated with the upper oil cavity A and the lower oil cavity B, and the piston body is tightly pressed on the piston rod 2 along with the downward movement of the piston rod 2. The contact sealing ring 32 is tightly pressed on the inner wall of the oil cylinder 1, when the piston rod 2 moves upwards, the piston 3 can not move upwards synchronously with the piston rod 2 due to the tight pressure between the contact sealing ring 32 and the oil cylinder 1, and can move relatively with the piston rod 2, so that an oil passing gap C is formed separately, the oil passing gap C has large oil passing quantity, oil in the upper oil cavity A can quickly flow into the lower oil cavity B when the piston rod 2 moves upwards, the formed damping force is small, the piston rod 2 can quickly move upwards, and because the piston rod 2 can compress the energy storage spring 4 when moving upwards, the upward movement speed of the piston rod 2 is gradually reduced, the door opening process of fast front half speed and slow half speed of door opening is formed, the door opening process of the latter half speed of door opening is prevented from causing extrusion damage of the edge of a door leaf due to the too fast speed, the door opening can be easily opened, and door damage caused by too large door opening thrust can be avoided.
The lower end of the piston rod 2 is provided with an annular groove 21, the annular groove 21 is provided with a circlip 9, the circlip 9 is located below the piston body 31 and is axially separated from the piston body 31, the piston body 31 is propped against the circlip 9 along with the upward movement of the piston rod 2, an oil passing gap C is formed by separating the piston body 31 from the piston rod 2, and the axial distance between the piston body 31 and the circlip 9 is 0.3-1 mm. For the restriction of the contact seal ring 32, when the piston rod 2 moves upwards, the piston 3 stays at the original position, the circlip 9 moves upwards synchronously along with the piston rod and is propped against the piston 2, so that the piston 3 and the piston rod 2 are separated to form an oil passing gap C, the piston rod continues to move upwards, the piston 2 is pulled upwards synchronously through the circlip 9, the oil passing gap C is unchanged at the moment, oil in the upper oil cavity A can quickly flow into the lower oil cavity B through the oil passing gap C, the gap between the piston rod 2 and the inner wall of the oil cylinder 1 and the gap between the piston rod 2 and the piston body 31, so that the piston rod 2 quickly moves upwards, the piston rod 2 upwards compresses the energy storage spring 4, the ascending speed is from high to low, after the upward speed of the piston rod 2 is reduced to zero, the compressed energy storage spring 4 pushes the piston rod 2 to move downwards, and the downward movement of the piston rod 2 drives the oil cylinder 1 to rotate, and the retraction of the door hinge is formed.
Wherein, an annular positioning groove 311 which is concave inwards is arranged on the piston body 31, the contact sealing ring 32 is hooped in the annular positioning groove 311, and lubricating grease is coated in the annular positioning groove 311. After the piston rod body 31 and the circlip 9 are propped against each other when the piston rod 2 moves upwards, the piston rod 2 drives the piston 3 to synchronously upwards through the circlip 9, the contact sealing ring 32 can move on the oil cylinder 2 in a friction way, the piston rod 2 props against the piston 3 to push the piston 3 to synchronously downwards when the piston rod 2 moves downwards, the contact sealing ring 32 can also move on the oil cylinder 2 in a friction way, so that the friction force between the piston rod 2 and the circlip is reduced, the abrasion of the contact sealing ring 32 is reduced, a certain amount of lubricating grease is coated in the positioning groove 311, the abrasion of the contact sealing ring 32 is reduced, and the service life of the contact sealing ring is prolonged.
The upper end of the piston rod 2 is fixed with a cross rod 22 arranged along the radial direction, the end part of the cross rod 22 penetrates out of the oil cylinder 1, and the oil cylinder 1 is provided with a spiral hole 10 for the end part of the cross rod to penetrate out and move. When the door hinge is unfolded, the oil cylinder 1 is driven to rotate, the end part of the cross rod 22 moves in the spiral hole 10 by the rotation of the oil cylinder 1, so that the piston rod 2 moves upwards along the threaded hole 10 to adapt to the movement of the cross rod 22 along the spiral hole 10, and when the energy storage spring 4 pushes the piston rod 2 to move downwards, the piston rod 2 moves downwards along the spiral hole 10 to drive the oil cylinder 1 to rotate, so that the door hinge is folded. The cooperation of the cross rod 11 and the spiral hole 10 realizes that the rotation of the oil cylinder 1 drives the upward movement of the piston rod 2, and the downward movement of the piston rod 2 drives the rotation of the oil cylinder 1, so that the movement of the piston rod 2 in the oil cylinder 1 is formed in the rotation process of the door hinge, and hydraulic buffering is formed for opening and closing the door.
The cylinder 1 is internally provided with a guide post 11 matched with the upper end of the piston rod 2 and a spring matching post 12 matched with the energy storage spring 4, the lower end of the guide post 11 is provided with a matching groove 111, the upper end of the piston rod 2 stretches into the matching groove 111, the upper end of the guide post 11 is in spherical contact with the lower end of the spring matching post 12, the spring matching post 12 stretches into the energy storage spring 4, the lower end of the energy storage spring 4 is propped against the spring matching post 12, the upper end of the energy storage spring is propped against the upper end of the cylinder 1, the guide post 11 is matched with the inner wall of the cylinder 1 in a guiding way, the spring matching post 12 is pushed to compress the energy storage spring 4 along with the upward movement of the piston rod 2, the length of the guide post 12 is designed, and the length of the energy storage spring 4 is adjusted, so that the rigidity of the energy storage spring 4 is designed. The upper end of the guide post 11 is a sphere, friction force between the piston rod 1 and the spring matching post 12 is reduced, the piston 3 and the piston rod 2 are separated to form an oil passing gap C when the piston rod 2 moves upwards, the oil passing gap C has large oil passing amount, so that oil damping force born by the piston rod 2 when the piston rod 2 moves upwards is small, the piston rod 2 moves upwards to compress the energy storage spring 4, the larger the rigidity of the energy storage spring 4 is, the larger the required force of the piston rod 2 moves upwards to compress the energy storage spring 4 is, the upward movement of the piston rod 2 is driven by the rotation of the oil cylinder 1, the rotation of the oil cylinder 1 is driven by the expansion of a door hinge caused by the external force pushing the door, the larger the rigidity of the energy storage spring 4 is, the larger the external force for the expansion of the door hinge is required to be regulated, and the external force required by the door opening can be regulated, through forming piston 3 and piston village 2 and forming oily clearance C, quick a large amount of oil that cross when the piston rod upwards moves, make the door open more laborsaving, the required dynamics of opening the door is adjusted through adjusting the rigidity of energy storage spring 4, avoid under the circumstances that external force is very little under the circumstances of guaranteeing laborsaving, the door just can be pushed open easily, reduce the probability that causes the mistake to open the door under the circumstances that external force is less, energy storage spring 4 is free state when the initial state of piston rod not upwards movement, energy storage spring 4 only compressed when piston rod 2 upwards moves, the length of guide post 11 is bigger, the length of energy storage spring 4 will be longer, its rigidity is just less, therefore the rigidity of energy storage spring 4 can be adjusted through adjusting the length of guide post 11.
The inner wall of the oil cylinder 1 is provided with an annular step surface 13 positioned above the oil seal 5, the top surface of the oil seal 5 is provided with a spring seat 14, an oil seal spring 15 is clamped between the spring seat 14 and the annular step surface 12, the upper end of the piston rod 2 passes through the oil seal 5, the spring seat 14 and the oil seal spring 15 to be matched with the guide post 10, and the spring seat 14 and the oil seal spring 15 are respectively in clearance fit with the piston rod. The oil seal spring 15 and the spring seat 14 elastically position the oil seal 5, when the piston rod 2 moves upwards to be in contact with the oil seal 5, the oil seal 5 is pushed by the piston rod 2 to move upwards to compress the oil seal spring 15, the upward movement speed of the piston rod 2 is reduced, the door opening angle is increased, and meanwhile door hinge damage caused by the over-fast door opening speed is prevented; after the door is opened in place, the oil seal spring 15 and the energy storage spring 4 push the piston rod 2 to move downwards together, so that the piston rod 2 is in contact with the piston 3 quickly, the width of the oil passing gap C is reduced to zero, and the oil seal spring 15 is protected from moving after being restored to a free state.
The foregoing disclosure of embodiments of the present invention has been fully described with reference to the accompanying drawings, in which it is to be understood that the embodiments described are merely some of the embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Claims (10)
1. The design method of the hinge door-closing hydraulic buffer comprises an oil cylinder, wherein a piston rod which moves along the axial direction along with the rotation of the oil cylinder, a piston which is in sealing fit with the inner wall of the oil cylinder, an energy storage spring which is compressed along with the upward movement of the piston rod, and an oil seal which is in sealing fit with the piston rod and the inner wall of the oil cylinder are arranged in the oil cylinder, the oil seal divides the inner cavity of the oil cylinder into an oil-free cavity and an oil-containing cavity which is positioned at the lower side of the oil-free cavity, the piston is positioned in the oil-containing cavity, the energy storage spring is positioned in the oil-free cavity, and the piston divides the oil-containing cavity into an upper oil cavity and a lower oil cavity, and the design method is characterized in that: the oil piston rod is provided with an oil passing channel which is communicated with the upper oil cavity and the lower oil cavity, a valve needle which can adjust the oil passing quantity of the oil passing channel is arranged in the oil cylinder, the piston is movably arranged on the piston rod, the piston moves upwards along with the piston rod and is separated from the piston rod to form an oil passing gap which is communicated with the upper oil cavity and the lower oil cavity, the valve needle moves downwards along with the piston rod to adjust the oil passing quantity of the oil passing channel, the rigidity of the energy storage spring is designed to adjust the rotating force of the oil cylinder required for driving the piston rod to move upwards, and the shape and the position of the valve needle are designed to adjust the speed of the downward movement of the piston rod.
2. The method for designing a hinge-closed hydraulic buffer according to claim 1, wherein: the upper end of the piston rod penetrates through the oil seal to extend into the oil-free cavity to be matched with the energy storage spring, the lower end of the piston rod extends into the oil cavity in a cross shape, the oil passing channel is formed at the lower end of the piston rod and consists of an axial oil channel arranged along the axial direction and a radial oil channel arranged along the radial direction in a cross connection mode, the valve needle extends into the axial oil channel in the oil cavity along the axial direction, and the valve needle is in a multi-section reducing shape with the diameter reduced from top to bottom.
3. The method for designing a hinge-closed hydraulic buffer according to claim 2, wherein: the valve needle is composed of a plurality of sections, the diameters of the sections from top to bottom are sequentially reduced, the difference between the diameter of the section on the uppermost layer and the inner diameter of the axial oil duct is not more than 0.05-0.2 mm, and the difference between the diameters of the adjacent sections is 0.2-0.5 mm.
4. The method for designing a hinge-closed hydraulic buffer according to claim 2, wherein: the lower end of the oil cylinder is sealed through a screw plug, screw plug thread matching stretches into an end cover at the lower end of the oil cylinder and is matched with the end cover at the lower end of the oil cylinder, the lower end of the valve needle is a spherical ball end, an arc groove which is matched with the ball end and is arranged along the radial direction is formed in the top surface of the screw plug, the ball end stretches into the arc groove, the number of segments in the valve needle, the length of each segment, the diameter difference of the adjacent segments and the axial position of the screw plug at the lower end of the oil cylinder are designed, and therefore the speed change quantity of the piston rod from slow speed to fast speed change when the piston rod moves downwards and the speed change quantity of the piston rod when the piston rod changes speed every time are adjusted.
5. The method for designing a hinge-closed hydraulic buffer according to claim 1, wherein: the piston comprises a piston body sleeved at the lower end of the piston rod and a contact sealing ring arranged on the piston body, the contact sealing ring is tightly pressed on the inner wall of the oil cylinder, the piston body is in clearance fit with the lower end of the piston rod and the inner wall of the oil cylinder respectively, and the piston body is separated from the piston rod along with the upward movement of the piston rod to form an oil passing gap communicated with the upper oil cavity and the lower oil cavity and is abutted against the piston rod along with the downward movement of the piston rod.
6. The method for designing a hinge-closed hydraulic buffer according to claim 5, wherein: the piston rod lower extreme offer the annular groove, be equipped with the circlip in the annular groove, the circlip is located piston body below and separates along the axial with the piston body, the piston body offsets with the circlip along with the upward movement of piston rod, separates with the piston rod and forms the oil clearance, the axial interval between piston body and the circlip is 0.3~1 millimeter.
7. The method for designing a hinge-closed hydraulic buffer according to claim 6, wherein: the piston body is provided with an annular positioning groove which is recessed inwards, the contact sealing ring is hooped in the annular positioning groove, and lubricating grease is coated in the annular positioning groove.
8. The method for designing a hinge-closed hydraulic buffer according to claim 2, wherein: the upper end of the piston rod is fixedly provided with a cross rod which is arranged along the radial direction, the end part of the cross rod penetrates out of the oil cylinder, and a spiral hole for the end part of the cross rod to penetrate out and move is formed in the oil cylinder.
9. The method for designing a hinge-closed hydraulic buffer according to claim 1, wherein: the cylinder is internally provided with a guide post matched with the upper end of the piston rod and a spring matching post matched with the energy storage spring, the lower end of the guide post is provided with a matching groove, the upper end of the piston rod extends into the matching groove, the upper end of the guide post is in spherical surface shape and contacts with the lower end of the spring matching post, the spring matching post extends into the energy storage spring, the lower end of the energy storage spring is propped against the spring matching post, the upper end of the energy storage spring is propped against the upper end of the cylinder, the guide post is matched with the inner wall of the cylinder in a guiding way, the spring matching post is pushed to compress the energy storage spring along with the upward movement of the piston rod, the length of the guide post is designed, and the length of the energy storage spring is adjusted, so that the rigidity of the energy storage spring is designed.
10. The method for designing a hinge-closed hydraulic buffer according to claim 9, wherein: the oil cylinder is characterized in that an annular step surface positioned above the oil seal is arranged on the inner wall of the oil cylinder, a spring seat is arranged on the top surface of the oil seal, an oil seal spring is clamped between the spring seat and the annular step surface, the upper end of the piston rod penetrates through the oil seal, the spring seat and the oil seal spring to be matched with the guide post, and the spring seat and the oil seal spring are respectively in clearance fit with the piston rod.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310711102.3A CN116537659A (en) | 2023-06-15 | 2023-06-15 | Design method of hinge door-closing hydraulic buffer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310711102.3A CN116537659A (en) | 2023-06-15 | 2023-06-15 | Design method of hinge door-closing hydraulic buffer |
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| Publication Number | Publication Date |
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| CN116537659A true CN116537659A (en) | 2023-08-04 |
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| CN202310711102.3A Pending CN116537659A (en) | 2023-06-15 | 2023-06-15 | Design method of hinge door-closing hydraulic buffer |
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| Country | Link |
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| CN (1) | CN116537659A (en) |
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- 2023-06-15 CN CN202310711102.3A patent/CN116537659A/en active Pending
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