CN109057598B - Axle center and hydraulic floor spring applying same - Google Patents
Axle center and hydraulic floor spring applying same Download PDFInfo
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- CN109057598B CN109057598B CN201811138200.8A CN201811138200A CN109057598B CN 109057598 B CN109057598 B CN 109057598B CN 201811138200 A CN201811138200 A CN 201811138200A CN 109057598 B CN109057598 B CN 109057598B
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- 230000006835 compression Effects 0.000 claims abstract description 44
- 238000007906 compression Methods 0.000 claims abstract description 44
- 238000007789 sealing Methods 0.000 claims abstract description 14
- 230000008859 change Effects 0.000 claims abstract description 6
- 239000010720 hydraulic oil Substances 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 239000003921 oil Substances 0.000 description 21
- 230000009471 action Effects 0.000 description 7
- 238000005336 cracking Methods 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 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
- 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
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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
- 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
- E05F3/10—Closers or openers with braking devices, e.g. checks; Construction of pneumatic or liquid braking devices with liquid piston brakes with a spring, other than a torsion spring, and a piston, the axes of which are the same or lie in the same direction
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- 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
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- Vehicle Body Suspensions (AREA)
Abstract
The invention relates to the technical field of floor springs, and discloses an axle center. The axle center comprises: the axle center body comprises a cylinder body with an opening at the bottom end; the shaft neck is in sealing connection with the bottom end opening of the cylinder body so as to form a balance cavity between the shaft neck and the cylinder body; the compression assembly is arranged in the balance cavity and seals and separates the balance cavity into a first cavity and a second cavity. Wherein, the top end of the axle center body is provided with a first channel, one end of which is communicated with the first cavity, and the other end of which is communicated with the outside; the inside of the journal is formed with a second passage having one end communicating with the second chamber and the other end communicating with the outside, so that when there is a pressure difference between the first passage and the second passage, the compression assembly can change the volumes of the first chamber and the second chamber by reciprocating in the balancing chamber to balance the pressures in the first passage and the second passage. The axle center of the invention can better balance the oil pressure in the hydraulic floor spring and prolong the service life of the hydraulic floor spring.
Description
Technical Field
The invention relates to the technical field of floor springs, in particular to an axle center and a hydraulic floor spring using the same.
Background
The hydraulic floor spring is a hydraulic door closer, and because the hydraulic floor spring is arranged below the ground surface and the structure of the hydraulic floor spring is covered by the cover plate after being connected with the door, people cannot observe accessories related to the hydraulic floor spring which obstruct the visual field or hinder the visual field through the door, and the door is more attractive in use; and because hydraulic ground springs are suitable for almost all wooden doors, steel doors, aluminum alloy doors, and borderless glass doors, they are increasingly being used.
However, the hydraulic floor spring often generates larger expansion pressure due to the fact that the surface temperature is too high in the high-temperature period in summer, hydraulic oil sealed inside the floor spring is caused to rise due to the fact that the expansion pressure acts on the sealing element, oil leakage of the hydraulic floor spring is prone to occur, and even the floor spring body is cracked in severe cases. The existence of oil leakage phenomenon not only easily causes the performance reduction of the hydraulic floor spring, but also causes pollution to the surrounding environment, and simultaneously influences the using aesthetic property. In order to reduce the influence of the oil leakage phenomenon, a structure with an oil pressure relieving function is generally designed in the conventional hydraulic ground spring, most of the structure with the oil pressure relieving function is that a balance pressure component is arranged in a closed cavity in the hydraulic ground spring, the balance pressure component is used for unloading the high pressure in the hydraulic ground spring by compressing air in the closed cavity in the hydraulic ground spring, but the disadvantage of the balance pressure mode is that the oil pressure rising in the closed cavity is balanced by utilizing the compressibility of the gas, the effect of the balance oil pressure is limited by the ratio of the gas volume sealed at the initial position of a piston in the closed cavity to the gas volume sealed at the final position of the piston, and the compressibility of the gas in the closed cavity is gradually reduced along with the gradual rising of the oil pressure, so that the capability of pressure unloading in the cavity is limited, and the pressure unloading effect is not ideal.
Aiming at the defects of the prior art, a person skilled in the art hopes to seek a hydraulic ground spring so that the hydraulic ground spring can better balance the oil pressure in a cavity of the hydraulic ground spring, thereby effectively avoiding the risks of oil leakage and cracking of a hydraulic ground spring body and further prolonging the service life of the hydraulic ground spring.
Disclosure of Invention
In order to better balance the oil pressure in the cavity of the hydraulic floor spring, the service life of the hydraulic floor spring is prolonged. The invention provides an axle center and a hydraulic floor spring using the same.
According to a first aspect of the present invention, there is provided a hub comprising: the axle center body comprises a cylinder body with an opening at the bottom end; the shaft neck is in sealing connection with the bottom end opening of the cylinder body so as to form a balance cavity between the shaft neck and the cylinder body; the compression assembly is arranged in the balance cavity and divides the balance cavity into a first cavity and a second cavity in a sealing way. Wherein, the top end of the axle center body is provided with a first channel, one end of which is communicated with the first cavity, and the other end of which is communicated with the outside; the inside of the journal is formed with a second passage having one end communicating with the second chamber and the other end communicating with the outside, so that when there is a pressure difference between the first passage and the second passage, the compression assembly is capable of changing the volumes of the first and second chambers by reciprocating within the balancing chamber to balance the pressures within the first and second passages.
Further, the compression assembly includes a first piston for hermetically dividing the balance cavity into a first cavity and a second cavity, and a first elastic member connected to the first piston, the first elastic member being connected to an inner wall of one of the first cavity and the second cavity.
Further, the journal comprises a first connecting end for being in sealing connection with the bottom end opening of the cylinder body and a second connecting end which is connected with the first connecting end and used for fixing the bearing piece, and a limiting boss is formed on the peripheral wall of the first connecting end.
Further, the axle center also comprises a shaft sleeve which is connected with the bottom end opening of the cylinder body and is coaxially matched with the outer surface of the limit boss.
Further, a first filter element is disposed within the first passage.
Further, a second filter element is disposed within the second channel.
Further, a cam is formed on the outer peripheral wall of the cylinder, and the axis of the cylinder is perpendicular to the plane of the cam.
According to a second aspect of the present invention, a hydraulic floor spring is presented. The hydraulic ground the spring comprises: a housing; the axle center is in sealed rotary connection with the inside of the shell, the first channel is communicated with the outside of the shell, and the second channel is communicated with the inside of the shell; and the hydraulic assembly is connected with the axle center, can reciprocate in the shell, and divides the interior of the shell into a first chamber and a second chamber for containing hydraulic oil in a sealing way.
Wherein the second passage communicates with the second chamber such that the compression assembly is stationary within the balance chamber when the pressure inside the housing is equal to the pressure outside the housing; when the ambient temperature rises, the pressure of the second chamber inside the shell rises due to oil expansion, the compression assembly moves upwards in the balance cavity to make room for the rising pressure oil to unload, and when the pressure of the second chamber inside the shell is approximately balanced with the pressure outside the shell, the compression assembly is in a static state for a relatively long time, and only when the ambient temperature drops again and the pressure of the second chamber inside the shell drops again, the compression assembly slowly moves downwards again to return to the initial position.
Further, the hydraulic assembly includes a second piston (a second piston has a built-in one-way ball valve, which is opened when the door is opened and closed when the door is closed) for dividing the interior of the housing into a first chamber and a second chamber, a connecting rod for connecting the second piston and the shaft center, and a second elastic member between the shaft center and the second piston.
Further, a limiting part is formed in the second chamber, the second elastic part is abutted between the limiting part and the second piston, and the connecting rod penetrates through the limiting part and is connected with the cam of the axle center.
Through the scheme, compared with the prior art, the axle center of the invention has the following two advantages: on the one hand, because the first channel is communicated with the outside, gas in the first cavity can be discharged to the external atmosphere environment through the first channel under the action of pressure, and the gas in the external atmosphere can be sucked to compress the second cavity under the action of suction, so that the regulation of the pressure of the gas in the first cavity to the second cavity is realized, namely the regulation of the pressure of the gas in the first cavity to the inside of the airtight structure is realized. Therefore, the axle center can better balance pressure, so that the stability of the whole structure of the closed structure applying the axle center is ensured, and particularly when the axle center is applied to the hydraulic ground spring, the axle center can better avoid the phenomena of oil leakage or body cracking of the hydraulic ground spring, thereby prolonging the service life of the hydraulic ground spring; on the other hand, compared with the existing axle center, the compression assembly additionally arranged in the axle center not only fully utilizes the available space in the axle center, but also reduces the weight of the axle center while guaranteeing the rotation and pressure adjusting functions of the axle center, and particularly reduces the overall weight of the hydraulic floor spring when the axle center is applied to the hydraulic floor spring.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.
FIG. 1 is a schematic view of a first embodiment of a hub according to the present invention;
FIG. 2 is a schematic structural view of a first embodiment of the hub body shown in FIG. 1;
FIG. 3 is a schematic view of the first embodiment of the journal shown in FIG. 1;
FIG. 4 is a schematic view of a second embodiment of a hub according to the present invention;
FIG. 5 is a schematic view of a second embodiment of the hub body shown in FIG. 4;
FIG. 6 is a schematic view of a second embodiment of the journal shown in FIG. 4;
FIG. 7 is a schematic view of a construction of a hydraulic ground spring according to the present invention;
fig. 8 is a cross-sectional view of the hydraulic ground spring shown in fig. 7 taken along the A-A direction.
Detailed Description
The technology of the invention will be described with reference to the accompanying drawings embodiments of the scheme are described in detail. The following examples are only for more clearly illustrating the technical aspects of the present invention, and thus are merely examples, and are not intended to limit the scope of the present invention.
Fig. 1 shows the structure of a hub 1 according to the invention. As shown in fig. 1, the shaft center 1 includes: the axle center body 11, the axle center body 11 includes a cylinder 13 with an opening at the bottom end; a journal 12, the journal 12 being sealingly connected to the bottom end opening of the cylinder 13 to form a balance cavity 131 between the journal 12 and the cylinder 13; the compression assembly 14, the compression assembly 14 is disposed in the balance cavity 131, and the balance cavity 131 is sealed and separated into a first cavity 132 and a second cavity 133. Wherein, the top end 111 of the axle center body 11 is formed with a first channel 112 with one end communicated with the first cavity 132 and the other end communicated with the outside; the journal 12 is internally formed with a second passage 121 having one end communicating with the second chamber 133 and the other end communicating with the outside, so that when there is a pressure difference between the first passage 112 and the second passage 121, the compression assembly 14 can change the volumes of the first chamber 132 and the second chamber 133 by reciprocating in the balance chamber 131 to approximately equalize the pressures in the first passage 112 and the second passage 121, thereby balancing the pressures in the first passage 112 and the second passage 121. The pressures in the first and second channels 112 and 121 are approximately equal, which means that when the compression assembly 14 balances the pressures in the first and second channels 112 and 121, the frictional resistance of the compression assembly 14 generated by the reciprocating motion in the balancing cavity 131 needs to be overcome.
The axle center 1 is mainly used for being connected with a closed structure to adjust the pressure inside the closed structure (such as a hydraulic ground spring), so that the structural stability of the closed structure can be effectively ensured. Specifically, the second channel 121 is communicated with the inner cavity of the closed structure, and the first channel 112 is communicated with the external atmosphere. Since the first channel 112 is connected to the outside and the first cavity 132, the gas pressure in the first cavity 132 is approximately equal to the external atmospheric pressure, when there is a pressure difference between the first channel 112 and the second channel 121, that is, when there is a difference between the external atmospheric pressure and the pressure in the sealed structure, the pressure in the first channel 112 or the second channel 121 with a larger pressure acts on the compression assembly 14, so that the compression assembly 14 moves in the cylinder 13 towards the direction with a smaller pressure, and the compression assembly 14 moves in the cylinder 13 under the action of the pressure, so that the volumes of the first cavity 132 and the second cavity 133 change until the pressure in the second channel 121 is equal to the pressure in the first channel 112, and the compression assembly 14 stops moving.
For example, when the pressure in the first channel 112 is smaller than the pressure in the second channel 121, that is, when the pressure of the external atmosphere is smaller than the pressure in the sealed structure, the pressure in the second channel 121 acts on the compression assembly 14 to move toward the first channel 112, and as the compression assembly 14 moves, the volume of the second cavity 133 becomes larger and the pressure becomes smaller gradually, until the volumes in the first cavity 132 and the second cavity 133 reach an equilibrium state to make the pressure in the first channel 112 equal to the pressure in the second channel 121, and the compression assembly 14 stops moving. Therefore, the axle center 1 of the invention can achieve the purpose of balancing the pressure in the first channel 112 and the second channel 121 by moving the compression assembly 14 under the action of the pressure difference, thereby effectively avoiding the occurrence of structural rupture and other problems caused by overlarge pressure in the closed structure, and further effectively ensuring the structural stability of the closed structure.
Compared with the prior art, the axle center 1 has the following two advantages: on the one hand, since the first channel 112 is communicated with the outside, the gas in the first cavity 132 can be discharged to the external atmosphere through the first channel 112 under the action of pressure, and the gas in the external atmosphere can be sucked to compress the second cavity under the action of suction, so that the pressure of the gas in the first cavity 132 to the second cavity 133 is adjusted, that is, the pressure of the gas in the first cavity 132 to the inside of the closed structure is adjusted. Therefore, the axle center 1 can better balance the pressure of the external atmosphere and the pressure of the inside of the closed structure, so that the stability of the whole structure of the closed structure applying the axle center 1 is ensured, and particularly when the axle center 1 is applied to a hydraulic ground spring, the axle center 1 can better avoid the phenomena of oil leakage or body cracking of the hydraulic ground spring, thereby prolonging the service life of the hydraulic ground spring; on the other hand, compared with the existing axle center, the axle center 1 has the compression assembly 14 additionally arranged in the axle center 1, so that not only is the available space in the axle center 1 fully utilized, but also the weight of the axle center 1 is reduced while the rotation and pressure adjusting functions of the axle center 1 are ensured, and especially, when the axle center 1 is applied to a hydraulic floor spring, the overall weight of the hydraulic floor spring is also reduced.
As shown in fig. 1, preferably, the compression assembly 14 may include a first piston 141 for dividing the balance chamber 131 into closed first and second chambers 132 and 133 and a first elastic member 142 (preferably, a spring) connected to the first piston 141, the first elastic member 142 being connected to an inner wall of one of the first and second chambers 132 and 133. With this arrangement, when there is a pressure difference between the first passage 112 and the second passage 121, and the pressure is balanced by the compression assembly 14, the balanced pressure only needs to overcome the resistance of the first elastic member 142 and the frictional resistance of the first piston 141 and the inner wall of the cylinder 13, so that the pressure adjusting function provided by the shaft center 1 of the present invention is related to the compression resistance of the first elastic member 142 and the frictional resistance of the first piston 141 and the inner wall of the cylinder 13.
Preferably, a sealing ring 15 is provided inside the compression assembly 14, and the sealing ring 15 is provided between the first piston 141 and the balance chamber 131. When the compression assembly 14 balances the pressure, the balanced pressure only needs to overcome the resistance of the first elastic element 142, the friction resistance of the first piston 141 and the inner wall of the cylinder 13 and the friction force between the sealing ring 15 and the balance cavity 131, so that the pressure adjusting function provided by the axle center 1 of the invention is related to the compression resistance of the first elastic element 142, the friction resistance of the first piston 141 and the inner wall of the cylinder 13 and the friction force between the sealing ring 15 and the balance cavity 131.
As shown in fig. 3, the journal 12 may preferably include a first connection end 122 for sealing-connecting with the bottom end opening of the cylinder 13 and a second connection end 123 connected with the first connection end 122 for fixing the bearing member, and a limit boss 124 may be formed on an outer circumferential wall of the first connection end 122.
Through the arrangement, when the axle center 1 is applied to the hydraulic floor spring, on one hand, the hydraulic floor spring is connected with a door through the axle center 1, the door opening moment born by the axle center 1 is transmitted to the axle journal 12 through the axle center body 11, and the axle center 1 can reliably operate in the service life range by designing the proper axial length of the first connecting end 122 and the interference magnitude of the interference fit between the first connecting end 122 and the inner wall of the barrel 13, so that the friction resistance between the first connecting end 122 and the inner wall of the barrel 13 can prevent the axle journal 12 from rotating relative to the axle center body 11, thereby ensuring that the axle center 1 has good structural strength during rotation; on the other hand, the limiting boss 124 also plays a limiting role on the journal 12, namely, prevents the journal 12 from moving further towards the direction of the axle center body 11 so as to stabilize the volume of the balance cavity 131.
In the preferred embodiment shown in fig. 1, the hub 1 further comprises a sleeve 18 located on the peripheral wall of the limit boss 124, the sleeve 18 being in clearance fit with the boss 124 of the journal 12, the sleeve 18 having a height less than the boss 124, one end of the sleeve 18 being in abutment with the bottom end of the barrel 13. When the hub 1 of the present invention is applied to a hydraulic floor spring, an axial pressure generated by gravity of a door connected to the top end of the hub 1 is transmitted to the journal 12 through the hub body 11, and then transmitted to other parts of the hydraulic floor spring through the lower end of the boss 124 of the journal 12. The shaft sleeve 18 is arranged to reduce the friction moment transmitted to the shaft neck 12, so that the risk of relative rotation between the shaft neck 12 and the cylinder 13 is reduced, the structural strength of the shaft center 1 is improved, and the service life of the shaft center 1 is prolonged.
It should be noted that, in the embodiment shown in fig. 4, the shaft center 1' may also not include the shaft sleeve 18, and as shown in fig. 5 and 6, the arrangement increases the contact area between the inner wall of the cylinder 13' and the first connecting end 122' of the journal 12', so as to enhance the connection strength between the shaft center body 11' and the journal 12', and the cooperation between the limiting boss 124' and the cylinder 13' plays a role in limiting the journal 12 '. Therefore, by the above arrangement, the strength of the journal 12 'itself is ensured while ensuring the function of using the shaft center 1'.
As shown in fig. 1, preferably, a first filter member 16 for filtering dust in the air may be disposed in the first passage 112; the second passage 121 may be provided therein with a second filter member 17 for filtering impurities in the hydraulic oil. This arrangement avoids the compressible volume of the balancing chamber 131 becoming smaller due to dust or impurities entering the balancing chamber 131, resulting in a smaller pressure that can be balanced, and thus affects the pressure balancing effect of the hub 1.
As shown in fig. 2, it is also preferable that a cam 113 is formed on the outer peripheral wall of the cylinder 13, and the axis of the cylinder 13 may be perpendicular to the plane in which the cam 113 is located. The cam 113 is used to connect with the structure inside the closed structure to drive the structure inside it to move. For example, as shown in fig. 7, the cam 113 is used to connect with the hydraulic assembly 21 inside the hydraulic ground spring 100, so that when the axle center 1 rotates, the cam 113 can be driven to rotate, and then the hydraulic assembly 21 connected with the cam 113 is driven to move, so as to realize reliable operation of the hydraulic assembly 21.
Fig. 7 shows a schematic structural view of a hydraulic floor spring 100 according to the present invention. As shown in fig. 7, a hydraulic floor spring 100 of the present invention includes: a housing 2; the shaft center 1, the shaft center 1 is connected with the inside of the shell 2 in a sealing and rotating way, the first channel 112 is communicated with the outside of the shell 2, and the second channel 121 is communicated with the inside of the shell 2; a hydraulic assembly 21 connected to the shaft center 1, the hydraulic assembly 21 being provided so as to be capable of reciprocating within the housing 2 and dividing the interior of the housing 2 into a first chamber 22 and a second chamber 23 for containing hydraulic oil in a sealing manner. Wherein the second passage 121 communicates with the second chamber 23 such that when the pressure of the second chamber 23 inside the housing 2 is equal to the pressure of the outside of the housing 2, the hydraulic assembly 21 reciprocates in the housing 2 under the rotation of the shaft center 1, and the compression assembly 14 is stationary in the balance chamber 131. While the pressure of the inner second chamber 23 of the housing 2 increases due to the expansion of the oil when the ambient temperature increases, the compression assembly 14 moves upward in the balance chamber 131 when the pressure thereof is greater than the resistance of the first elastic member 142, the frictional resistance of the first piston 141 and the inner wall of the cylinder 13, the frictional force between the seal ring 15 and the balance chamber 131, and the pressure of the external atmosphere. Since the ambient temperature rises relatively slowly, the compression assembly 14 moves slowly upward at a very low rate until the ambient temperature no longer changes, the compression assembly 14 is at rest; when the ambient temperature decreases, the volume of the oil in the second chamber 23 inside the housing 2 contracts, the pressure also decreases, and the compression assembly 14 slowly moves downward against the friction force under the elastic force of the first elastic member 142 and the atmospheric pressure until the ambient temperature is no longer changed, and the compression assembly 14 is again in a stationary state. The speed of movement of the compression assembly 14 is slow relative to the speed of reciprocation of the hydraulic assembly 21 and does not affect the movement of the hydraulic assembly 21, and can be considered as two independent movements.
As shown in fig. 1, the interior of the housing 2 is sealed and divided into a first chamber 22 and a second chamber 23 for containing hydraulic oil, and the main reason for the change of the internal pressure of the hydraulic ground spring 100 is the change of the internal temperature of the same, when the temperature of the interior of the hydraulic ground spring 100 increases, the expansion coefficient of the hydraulic oil contained in the second chamber 23 is larger than that of the housing 2, the hydraulic oil in the second chamber 23 can reach the second channel 121 connected with the second chamber 23 through the gap of the bearing member 25 installed at the lower part of the axle center 1 under the condition of complete sealing, and then pass through the second channel 121 and the second filter member 17 to enter the second chamber 133, the expanded hydraulic oil pushes the first piston 141 of the compression assembly 14 to move upwards and compress the air in the first chamber 132, and the air in the first chamber 132 can reach the balance between the pressure in the first channel 112 and the pressure in the second channel 121 through the first channel 112 and the first filter member 16, that is, so that the pressure in the second chamber is balanced by the hydraulic oil in the second channel 121, the pressure in the second chamber is released, and the pressure balance of the hydraulic oil in the second chamber 100 is achieved, and the purpose of the pressure balance in the expansion of the spring is achieved.
By the above arrangement, when the hydraulic floor spring 100 is operated, the shaft center 1 is engaged with the hydraulic unit 21, so that not only a function of a conventional general hydraulic floor spring can be realized, but also the hydraulic floor spring 100 of the present invention can have a function of balancing an internal pressure. The hydraulic floor spring 100 of the present invention can limit the maximum value of the internal pressure of the housing only by overcoming the elastic force of the first elastic member 142 in the axle center 1 and the friction force between the first piston 141 and the inner wall of the cylinder 13 when balancing the pressure, but the axle center of the hydraulic floor spring in the prior art does not have the pressure adjusting function of the axle center 1 of the hydraulic floor spring 100 of the present invention, so that the purpose that the hydraulic floor spring 100 of the present invention can effectively prolong the service life thereof cannot be achieved.
As shown in fig. 7, the hydraulic assembly 21 may preferably include a second piston 211 for dividing the interior of the housing 2 into a first chamber 22 and a second chamber 23 (as shown in fig. 8, the second piston 211 has a ball check 214 built therein, the ball check 214 is opened when the door is opened, the ball check 214 is closed when the door is closed), a connecting rod 212 for connecting the second piston 211 and the hub 1, and a second elastic member 213 between the hub 1 and the second piston 211. The second chamber 23 may preferably further have a limiting member 24 formed therein, and the second elastic member 213 abuts between the limiting member 24 and the second piston 211, and the connecting rod 212 is connected to the cam 113 of the shaft center 1 through the limiting member 24.
Through the connection between the cam 113 and the connecting rod 212, in the door opening process, the position of the connecting rod 212 acting on the cam 113 changes, the connecting rod 212 drives the second piston 211 to move towards the axle center 1 along the inner wall of the shell 2, and compresses the second elastic piece 213 abutted between the limiting component 24 and the second piston 211, so that the volume of the first chamber 22 is increased, the volume in the second chamber 23 is reduced, and oil in the second chamber 23 freely flows into the first chamber 22 through the one-way ball valve 214 arranged in the second piston 211, namely, when the door is in an open state, the first chamber 22 is communicated with the second chamber 23; during the closing process, the built-in one-way ball valve 214 of the second piston 211 is closed, so that the second piston 211 can move away from the axle center 1 under the action of the elastic force of the compressed second elastic member 213, and the closed oil of the first chamber 22 flows back to the second chamber 23 through the throttle valve 215 (shown in fig. 8) of the floor spring 100.
In summary, on the premise of ensuring the existing hydraulic floor spring function, the hydraulic floor spring 100 of the present invention can better balance the oil pressure in the cavity of the hydraulic floor spring 100 by only overcoming the elastic force of the first elastic member 142 and the friction force between the first piston 141 and the inner wall of the cylinder 12 in the axle center 1 through the compression assembly 14 additionally arranged in the axle center 1, so as to effectively avoid the risk of oil leakage of the hydraulic floor spring 100 and the cracking of the body of the hydraulic floor spring 100, and further improve the service life of the hydraulic floor spring 100.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: it is still possible to modify the technical solutions described in the foregoing embodiments, or equivalent substitution of some or all of the technical features thereof; such modifications and substitutions do not depart from the spirit of the invention, and are intended to be included within the scope of the appended claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (10)
1. An axle center, characterized by comprising,
the axle center body comprises a cylinder body with an opening at the bottom end,
a journal sealingly connected to the bottom end opening of the cylinder to form a balance cavity between the journal and the cylinder,
the compression assembly is arranged in the balance cavity and seals and separates the balance cavity into a first cavity and a second cavity,
wherein, the top end of the axle center body is provided with a first channel, one end of which is communicated with the first cavity, and the other end of which is communicated with the outside; the inside of the journal is formed with a second passage having one end communicating with the second chamber and the other end communicating with the outside, so that the compression assembly can change the volumes of the first chamber and the second chamber by reciprocating in the balance chamber to balance the pressures in the first passage and the second passage when there is a pressure difference in the first passage and the second passage.
2. The hub of claim 1, wherein said compression assembly includes a first piston for sealingly dividing said balance cavity into said first and second cavities and a first resilient member connected to said first piston, said first resilient member being connected to an inner wall of one of said first and second cavities.
3. The hub according to claim 1 or 2, wherein the journal comprises a first connection end for sealing connection with the bottom end opening of the cylinder and a second connection end connected with the first connection end for fixing a bearing member, and a limit boss is formed on an outer peripheral wall of the first connection end.
4. A hub according to claim 3, further comprising a sleeve on the peripheral wall of the limit boss, one end of the sleeve abutting the bottom end of the barrel.
5. A hub according to claim 1 or 2, wherein a first filter element is provided in the first passage.
6. A hub according to claim 1 or 2, wherein a second filter element is provided in the second passage.
7. The hub of claim 1 or 2, wherein a cam is further formed on the peripheral wall of the barrel, and wherein the axis of the barrel is perpendicular to the plane of the cam.
8. A hydraulic floor spring, comprising:
the shell body is provided with a plurality of grooves,
a hub according to any one of claims 1 to 7, said hub being in sealed rotary connection with the interior of said housing, said first passage being in communication with the exterior of said housing, said second passage being in communication with the interior of said housing,
a hydraulic assembly coupled to the hub, the hydraulic assembly configured to reciprocate within the housing and to sealingly divide the housing interior into a first chamber and a second chamber for containing hydraulic oil,
wherein the second passage communicates with the second chamber such that when the pressure inside the housing is equal to the pressure outside the housing, the hydraulic assembly reciprocates within the housing under the rotation of the hub while the compression assembly is stationary within the balance chamber; and the compression assembly reciprocates within the balance chamber when the pressure inside the housing is unequal to the pressure outside the housing.
9. The hydraulic floor spring according to claim 8, wherein the hydraulic assembly includes a second piston dividing the interior of the housing into the first and second chambers, a connecting rod connecting the second piston and the hub, and a second elastic member located between the hub and the second piston.
10. The hydraulic floor spring according to claim 9, wherein a limiting member is formed in the second chamber, the second elastic member abuts between the limiting member and the second piston, and the connecting rod passes through the limiting member to be connected with the cam of the shaft center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811138200.8A CN109057598B (en) | 2018-09-28 | 2018-09-28 | Axle center and hydraulic floor spring applying same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811138200.8A CN109057598B (en) | 2018-09-28 | 2018-09-28 | Axle center and hydraulic floor spring applying same |
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| CN109057598A CN109057598A (en) | 2018-12-21 |
| CN109057598B true CN109057598B (en) | 2024-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811138200.8A Active CN109057598B (en) | 2018-09-28 | 2018-09-28 | Axle center and hydraulic floor spring applying same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110715056B (en) * | 2019-10-21 | 2021-08-03 | 高新兴物联科技有限公司 | Sealing ring and protective structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE9014665U1 (en) * | 1990-10-23 | 1991-01-03 | Stabilus Gmbh, 5400 Koblenz | Gas spring with temperature-compensated holding force |
| CN101975006A (en) * | 2010-10-28 | 2011-02-16 | 肇庆市志成气动有限公司 | Multifunctional floor spring |
| CN107419985A (en) * | 2017-09-13 | 2017-12-01 | 厦门德浦精密科技有限公司 | A kind of damper with temperature-compensating |
| CN209761146U (en) * | 2018-09-28 | 2019-12-10 | 上海东铁五金有限公司 | axle center and use its hydraulic floor spring |
-
2018
- 2018-09-28 CN CN201811138200.8A patent/CN109057598B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE9014665U1 (en) * | 1990-10-23 | 1991-01-03 | Stabilus Gmbh, 5400 Koblenz | Gas spring with temperature-compensated holding force |
| CN101975006A (en) * | 2010-10-28 | 2011-02-16 | 肇庆市志成气动有限公司 | Multifunctional floor spring |
| CN107419985A (en) * | 2017-09-13 | 2017-12-01 | 厦门德浦精密科技有限公司 | A kind of damper with temperature-compensating |
| CN209761146U (en) * | 2018-09-28 | 2019-12-10 | 上海东铁五金有限公司 | axle center and use its hydraulic floor spring |
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| CN109057598A (en) | 2018-12-21 |
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