CN201326674Y - Hydraulic damper - Google Patents
Hydraulic damper Download PDFInfo
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- CN201326674Y CN201326674Y CNU2008201811865U CN200820181186U CN201326674Y CN 201326674 Y CN201326674 Y CN 201326674Y CN U2008201811865 U CNU2008201811865 U CN U2008201811865U CN 200820181186 U CN200820181186 U CN 200820181186U CN 201326674 Y CN201326674 Y CN 201326674Y
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- pull bar
- hydraulic oil
- lid
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Abstract
The utility model relates to a hydraulic damper, which comprises a cylinder body, a push-and-pull rod and a piston which is arranged on one end which extends into the cylinder body of the push-and-pull rod as well as a bias part which supplies a reciprocating bias force to the piston along with the axial direction of the cylinder body; the piston is provided with a circulation retaining valve and a limit device; and the circulation retaining valve limits that the hydraulic oil inside a sealing cavity can only flows from a first part of the sealing cavity on one side of the piston to a second part of the sealing cavity on the other side of the piston, and the limit device limits the flow rate of the hydraulic oil between the two parts of the sealing cavity. The hydraulic damper has easy processing and simple structure, and can precisely adjust and control the damping effect of the hydraulic oil on the piston; when the foreign force which is applied on the push-and-pull rod is cancelled and when the bias part supplies the reciprocating bias force to the piston along with the axial direction of the cylinder body, the piston can slowly and softly return.
Description
Technical field
The utility model relates to a kind of damper.Specifically a kind of adjustable hydraulic damper.
Background technique
Chinese patent literature CN201129105Y discloses a kind of damper, comprise cylinder body and piston rod, piston rod links to each other with piston after passing banking stop and damping fin, keep certain oil-gap of crossing between piston, damping fin and banking stop and the inboard wall of cylinder block, it is to come the fluid flow that slit flow is crossed between control piston and the cylinder body to regulate and control the size of hydraulic oil to damping function that piston produces by damping fin.But this damper is if will realize regulating and control the size of hydraulic oil to damping function that piston produces more accurately, and its requirement on machining accuracy height is produced difficulty, can cause more waste product, makes to produce and economizes this raising.Chinese patent literature CN2727345Y discloses a kind of hydraulic damper, comprise piston and piston cylinder, described piston comprises an one-way valve tool, this valve tool be set as when piston in piston cylinder when a certain direction moves, only can allow hydraulic fluid flow towards a direction via this piston, experience little resistance thereby making flows, piston can move towards this direction with comparalive ease; Be provided with a bypass channel between the inner sleeve of piston cylinder and the outer sleeve, so that piston when other direction moves, can allow fluid flow through from compartment, making flows suffers bigger resistance, and piston moves towards this direction very lentamente.The size of hydraulic oil to the piston damping function can not accurately be regulated and control to disclosed technological scheme in the above-mentioned patent documentation, and the damper structure more complicated, increased the operation of producing, and also makes cost of production improve.
The model utility content
For this reason, technical problem to be solved in the utility model is to provide a kind of easy processing, simple in structure, can accurately regulate and control the size of hydraulic oil to described piston damping function, and remove the external force that is applied on the described pull bar, biasing member to described piston provide along described Boring mill to the answer biasing force time, can make described piston slowly, mildly return.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solution: a kind of hydraulic damper, comprise a cylinder body, and described cylinder body has at least one opening end;
Cylinder body covers, and seals the opening end of described cylinder body, to form sealed chamber in described cylinder body, forms through hole on the end face of one of them described cylinder body lid;
The through hole that a pull bar, one end pass on the end face of described cylinder body lid stretches in the described cylinder body (12);
A piston is installed in described pull bar and stretches on the end in the described cylinder body, and described sealed chamber is divided into two-part, and can be along described inboard wall of cylinder block back and forth movement hermetically; And
A biasing member is arranged between described piston and the described cylinder body, to described piston provide along described Boring mill to the answer biasing force; Described piston is provided with circulation one-way valve and current-limiting apparatus, described circulation one-way valve limits in the second portion of described sealed chamber that hydraulic oil in the described sealed chamber can only flow to described piston opposite side in the first portion of the described sealed chamber of described piston one side, and described current-limiting apparatus limits the flow rate of hydraulic oil between two-part of described sealed chamber.
Above-mentioned hydraulic damper, the described current-limiting apparatus opening that exceeds.
Above-mentioned hydraulic damper, described current-limiting apparatus are Check valve of current limiter, and described Check valve of current limiter allows the direction of flow of fluid to allow the direction of flow of fluid opposite with described circulation one-way valve.
Above-mentioned hydraulic damper, described biasing member are the Returnning spring that is arranged between described piston and the described cylinder body lid.
Above-mentioned hydraulic damper, described piston comprises
Piston only, described piston only have a cylinder side wall and are arranged on the next door of described cylinder side wall middle part radial arrangement, and described next door is provided with described circulation one-way valve and described current-limiting apparatus; And
Described circulation one-way valve comprises first valve opening of the part taper that is molded on the described next door, be arranged on the valve ball in described first valve opening, first piston lid on end that is fixedly installed on described piston only with through hole, and be arranged on spring between described first piston lid and the described valve ball;
Be provided with a slit that is used for the hydraulic oil circulation between described first piston lid and the described next door.
Above-mentioned hydraulic damper, described pull bar covers by being fixedly attached to described first piston, is connected with described piston; The described through hole that described first piston covers is to be arranged on the hydraulic oil channel that described pull bar closes on an end of described first piston lid, and an end of described hydraulic oil channel is communicated with corresponding described sealed chamber by the sidewall of described pull bar; The other end of described hydraulic oil channel is communicated with the slit that is used for the hydraulic fluid circulation between described first piston lid and the described next door.
Above-mentioned hydraulic damper, described current-limiting apparatus comprises second valve opening of the part taper that is molded on the described next door, the tapered direction of described second valve opening is opposite with the tapered direction of described first valve opening, be arranged on the valve ball in described second valve opening, second piston cap on the other end that is fixedly installed on described piston only with through hole, and be arranged on spring between described second piston cap and the described valve ball;
Be provided with a slit that is used for the hydraulic fluid circulation between described second piston cap and the described next door.
Above-mentioned hydraulic damper, described pull bar is connected with described piston by being fixedly attached on described first piston lid or described second piston cap; Described through hole on described first piston lid or described second piston cap is to be arranged on the hydraulic oil channel that described pull bar closes on an end of described piston, and an end of described hydraulic oil channel is communicated with corresponding described sealed chamber by the sidewall of described pull bar; The other end of described hydraulic oil channel is communicated with the slit that is used for the hydraulic oil circulation between described first piston lid or described second piston cap and the described next door.
Above-mentioned hydraulic damper, described cylinder body lid comprises sealing cover and fixed cover; Be provided with seal ring between the internal surface of described sealing cover outer surface and described cylinder ends corresponding position; The outer surface of described fixed cover internal surface and described cylinder ends corresponding position is provided with screw thread, so that described fixed cover fixes with the corresponding end thread of described cylinder body, and described sealing cover is pressed in the corresponding end of described cylinder body.
Above-mentioned hydraulic damper, in forming the described cylinder body lid of through hole, also comprise pull bar sealed screw cover and pull bar seal ring, the through hole of described sealing cover has radially inwardly outstanding boss near an end portion of described sealed chamber, and be provided with the internal thread that matches with the outside thread of described pull bar sealed screw cover away from the inwall of an end portion of described sealed chamber, described pull bar seal ring is between described pull bar sealed screw cover and described sealing cover, along with described pull bar sealed screw cover is tightened towards described sealing cover, described pull bar seal ring forms the sealing between described pull bar and described pull bar sealed screw cover and the sealing cover.
Technique scheme of the present utility model has the following advantages compared to existing technology: (1) the utility model hydraulic damper is owing to be provided with circulation one-way valve and current-limiting apparatus on described piston, make that the overall structure of damper is fairly simple, the glide path of hydraulic oil is also fairly simple, and production and processing is easy.(2) described current-limiting apparatus adopts Check valve of current limiter, can more accurately regulate and control the size of hydraulic oil to described piston damping function when being convenient to production and processing, better by the described piston of design control slowly, mildly return.(3) structure that hydraulic oil channel is set in the structure that is connected with piston by piston cap of pull bar and the pull bar makes hydraulic damper structure of the present utility model compact more, is convenient to miniaturization.
Description of drawings
For the easier quilt of content of the present utility model is clearly understood, according to specific embodiment of the utility model also in conjunction with the accompanying drawings, the utility model is described in further detail, wherein below
Fig. 1 is the structural representation of the utility model hydraulic damper;
Fig. 2 is the another kind of structural representation of the utility model hydraulic damper shown in Figure 1;
Fig. 3 is the another kind of structural representation of the utility model hydraulic damper shown in Figure 1;
Fig. 4 is the another kind of structural representation of the utility model hydraulic damper;
Fig. 5 is the another kind of structural representation of the utility model hydraulic damper shown in Figure 4;
Fig. 6 is the structural representation of cross section of the piston of Fig. 1 and the utility model hydraulic damper shown in Figure 4;
Fig. 7 is the structural representation of longitudinal section of the piston of the utility model hydraulic damper shown in Figure 1;
Fig. 8 is the structural representation of another kind of longitudinal section of the piston of the utility model hydraulic damper shown in Figure 4;
Fig. 9 is the structural representation of another kind of longitudinal section of the piston of the utility model hydraulic damper shown in Figure 4;
Figure 10 is the structural representation of another kind of longitudinal section of the piston of the utility model hydraulic damper shown in Figure 1;
Figure 11 is the another kind of structural representation of the utility model hydraulic damper shown in Figure 4.
Reference character is expressed as among the figure: 1-pull bar termination, 2-pull bar, 3-Returnning spring, 4-first piston lid, the 5-seal ring, 6-piston only, 7-second piston cap, 8-left side fixed cover, 9-pull bar sealed screw cover, 10-left side sealing cover, 11-pull bar seal ring, the 12-cylinder body, 13-right side fixed cover, 14-right side sealing cover, 151-current limliting through hole, 152-Check valve of current limiter, the 16-one-way valve that circulates, the 17-valve ball, 18-hydraulic oil channel, 19-spring.
Embodiment
As Fig. 1, Fig. 2, Fig. 3, Fig. 6 and shown in Figure 7, the hydraulic damper of present embodiment comprises cylinder body 12, pull bar 2 and piston, and described pull bar 2 has one and is convenient to the pull bar termination 1 that is connected with other parts, and described cylinder body 12 has two opening ends.Wherein said cylinder body 12 right openings ends seal with right side cylinder body lid, described cylinder body lid comprises right side fixed cover 13 and 14 sealings of right side sealing cover, the right-hand member of described right side sealing cover 14 forms the outstanding flange of radially outward, is provided with seal ring 5 between the internal surface of described right side sealing cover 14 outer surfaces and described cylinder body 12 end corresponding positions; The outer surface of described right side fixed cover 13 internal surfaces and described cylinder body 12 end corresponding positions is provided with screw thread, so that right side fixed cover 13 is fixed with the corresponding end thread of described cylinder body 12, and form the cooperating of end of the outstanding described flange of radially outward and described cylinder body 12 right openings ends by the right-hand member of described right side sealing cover 14, described right side sealing cover 14 is pressed in described cylinder body 12 right parts.Described cylinder body 12 left side opening ends are formed the left side cylinder body lid sealing of through hole on the end face.In described cylinder body 12, form sealed chamber like this.Described left side cylinder body lid comprises left side sealing cover 10, left side fixed cover 8, forms externally threaded pull bar sealed screw cover 9, pull bar seal ring 11; The left end of described left side sealing cover 10 forms the outstanding flange of radially outward, is provided with seal ring 5 between the internal surface of described left side sealing cover 10 outer surfaces and described cylinder body 12 end corresponding positions; The outer surface of described left side fixed cover 8 internal surfaces and described cylinder body 12 end corresponding positions is provided with screw thread, so that described left side fixed cover 8 is fixed with the corresponding end thread of described cylinder body 12, and form the cooperating of end of the outstanding described flange of radially outward and described cylinder body 12 left side opening ends by the right-hand member of described left side sealing cover 10, described left side sealing cover 10 is pressed in described cylinder body 12 left parts; The through hole of described left side sealing cover 10 has radially inwardly outstanding boss near an end portion of described sealed chamber, and be provided with the internal thread that matches with the outside thread of described pull bar sealed screw cover 9 away from the inwall of an end portion of described sealed chamber, described pull bar seal ring 11 is between described pull bar sealed screw cover 9 and described left side sealing cover 10, along with described pull bar sealed screw cover 9 is tightened towards described left side sealing cover 10, described pull bar seal ring 11 form described pull bars 2 and described pull bar sealed screw overlap 9 and left side sealing cover 10 between sealing.Described piston comprises piston only 6, circulation one-way valve 16 and current-limiting apparatus; Described piston only 6 has a cylinder side wall and is arranged on the next door of described cylinder side wall middle part radial arrangement, and described next door is provided with described circulation one-way valve 16 and described current-limiting apparatus; Described circulation one-way valve 16 comprises four first valve openings that are molded over the part taper on the described next door, be arranged on the valve ball 17 in described first valve opening, first piston lid 4 on end that is fixed on described piston only 6 by being threaded with through hole, and be arranged on spring 19 between described first piston lid 4 and the described valve ball 17, be provided with one between described first piston lid 4 and the described next door and be used for the slit that hydraulic oil circulates; Described current-limiting apparatus comprises second valve opening that is molded over the part taper on the described next door, the tapered direction of described second valve opening is opposite with the tapered direction of described first valve opening, be arranged on the valve ball 17 in described second valve opening, second piston cap 7 on the other end that is fixedly installed on described piston only 6 by being threaded with through hole, and be arranged on spring 19 between described second piston cap 7 and the described valve ball 17, be provided with a slit that is used for the hydraulic fluid circulation between described second piston cap 7 and the described next door.One end of pull bar 2 passes described left side fixed cover 8 successively, left side sealing cover 10 and pull bar sealed screw cover 9, pull bar seal ring 11 stretches in the described cylinder body 12 and to cover 4 with described first pistons and fixedly connected by screw thread, thereby realize being connected with described piston, the end that described pull bar 2 closes on described piston is provided with hydraulic oil channel 18, the sidewall of one end of described hydraulic oil channel 18 by described pull bar 2 is communicated with described pull bar 2 residing sealed chamber, the other end of described hydraulic oil channel 18 be communicated with described first piston cover 4 and described next door between be used for the slit that hydraulic oil circulates.The Returnning spring 3 of described in the present embodiment biasing member for being provided with in the cylinder body between described second piston cap 7 and described right side sealing cover 14, the length of preferred Returnning spring 3 is poor more than or equal to the length of described sealed chamber and described piston axial length, make damper work better and play a role, the diameter of preferred described Returnning spring 3 is slightly less than the internal diameter of described cylinder body, directly places described cylinder body so that described Returnning spring 3 two ends need not be fixed.
As shown in Figure 2, by pull bar 2 make piston to the right sealing cover 14 directions move and compression reseting spring 3, valve ball 17 in the hydraulic oil extruding circulation one-way valve 16 between piston and the right side sealing cover 14 in the sealed chamber makes it pressure spring 19, and then open through hole, hydraulic oil enters hydraulic oil channel 18 by the slit between first piston lid 4 and the compartment, enters the sealed chamber between piston and the left side sealing cover 10 at last; And the valve ball 17 in the Check valve of current limiter 152 is subjected to the extruding of hydraulic oil, thereby the through hole on the shutoff compartment can not pass through hydraulic oil.As shown in Figure 3, after removing the external force that is applied on the pull bar 2, under the effect of Returnning spring 3, piston slowly and mildly along Boring mill to the left sealing cover 10 move, valve ball 17 in the hydraulic oil extruding circulation one-way valve 16 between piston and the left side sealing cover 10 in the sealed chamber, thereby the through hole on the shutoff compartment can not pass through hydraulic oil from circulation one-way valve 16; And the valve ball 17 in the Check valve of current limiter 152 is subjected to the extruding of hydraulic oil, pressure spring 19, and then open through hole, the hydraulic oil between piston and the left side sealing cover 10 in the sealed chamber can only pass through slit between hydraulic oil channel 18, Check valve of current limiter 152, second piston cap 7 and the compartment successively and enter in the sealed chamber between piston and the right side sealing cover 14.
Therefore, under external force piston along Boring mill when the compression reseting spring 3, circulation one-way valve 16 is all opened, hydraulic oil flow to sealed chamber between piston and the left side sealing cover 10 from the sealed chamber between piston and the right side sealing cover 14 with comparalive ease, this moment, hydraulic oil was less to the damping function of piston, and less external force can make piston move; After removing external force, circulation one-way valve 16 Close Alls, Check valve of current limiter 152 is opened, hydraulic oil is relatively difficult from the sealed chamber that the sealed chamber between piston and the left side sealing cover 10 flow between piston and the right side sealing cover 14, this moment, hydraulic oil was bigger to the damping function of piston, thereby realized that piston slowly, mildly reset.The hydraulic damper easy processing of present embodiment, simple in structure, can accurately regulate and control the size of hydraulic oil to described piston damping function, occasion difference according to the application of present embodiment hydraulic damping implement body, can be by quantity of regulating circulation one-way valve 16 and Check valve of current limiter 152 and the aperture that allows hydraulic oil to pass through, thereby accurately regulate and control the size of hydraulic oil to described piston damping function, and removing the external force that is applied on the described pull bar, when Returnning spring 3 provides along the axial elastic force of described cylinder body 12 to described piston, make described piston slow, mildly return.In the present embodiment, described current-limiting apparatus is a Check valve of current limiter 152, described Check valve of current limiter 152 allows the direction of flow of fluid to allow the direction of flow of fluid opposite with described circulation one-way valve 16, make it possible to more accurately regulate and control the size of hydraulic oil to described piston damping function, and removing the external force that is applied on the described pull bar 2, Returnning spring 3 when described piston provides along the axial back stretch of described cylinder body 12, controlling described piston better slowly, mildly return.In addition, described circulation one-way valve 16 and Check valve of current limiter 152 are made of valve opening and the spring 19 and the valve ball 17 that are arranged in the valve opening, make it possible to more accurately control amount, thereby more accurately regulate and control the size of hydraulic oil described piston damping function through the hydraulic oil of valve opening.
As Figure 11, Fig. 4, Fig. 5, Fig. 6 and shown in Figure 8, present embodiment and embodiment's 1 a difference is that Returnning spring 3 is arranged between piston and the left side sealing cover 10; The another one difference is that conversion has taken place structure of piston, thereby make the flow direction of the hydraulic oil that circulation one-way valve 16 and Check valve of current limiter 152 allow and the structure of first piston lid 4 and second piston cap 7 that variation also take place, described pull bar 2 and second piston cap 7 are by fixedlying connected, and all the other are all identical.
As shown in Figure 4, by pull bar 2 make piston to the left sealing cover 10 directions move and compression reseting spring 3, hydraulic oil between piston and the left side sealing cover 10 in the sealed chamber enters slit between second piston cap 7 and the compartment by hydraulic oil channel 18, and then the valve ball 17 in the extruding circulation one-way valve 16 makes it pressure spring 19, open through hole, thereby hydraulic oil enters the sealed chamber between piston and the right side sealing cover 14; And the valve ball 17 in the Check valve of current limiter 152 is subjected to the extruding of hydraulic oil, thereby the through hole on the shutoff compartment can not pass through hydraulic oil.As shown in Figure 5, after removing the external force that is applied on the pull bar 2, under the effect of Returnning spring 3, piston slowly and mildly along Boring mill to the right sealing cover 14 move, valve ball 17 in the hydraulic oil extruding circulation one-way valve 16 between piston and the right side sealing cover 14 in the sealed chamber, thereby the through hole on the shutoff compartment can not pass through hydraulic oil from circulation one-way valve 16; And the valve ball 17 in the Check valve of current limiter 152 is subjected to the extruding of hydraulic oil, pressure spring 19, and then open through hole, the hydraulic oil between piston and the right side sealing cover 14 in the sealed chamber can only be successively enters in the sealed chamber between piston and the left side sealing cover 10 through slit, hydraulic oil channel 18 between slit, Check valve of current limiter 152, second piston cap 7 and the compartment between first piston lid 4 and the compartment.Present embodiment has been realized the purpose of the invention equally.
In embodiment 1, described piston also can be a structure as shown in figure 10, the described current-limiting apparatus opening 151 that exceeds, during compression reseting spring 3, hydraulic oil flows to the seal chamber of the opposite side of piston simultaneously from circulate one-way valve 16 and current limliting through hole 151, described second piston cap 7 can not have yet, and this spline structure is simple more, processing is more prone to.In embodiment 2, described piston also can be a structure as shown in Figure 9, and the described current-limiting apparatus opening 151 that exceeds, hydraulic oil flow to the seal chamber of the opposite side of piston simultaneously from circulation one-way valve 16 and current limliting through hole 151.Make and removing the external force that is applied on the described pull bar 2, biasing member when described piston provides along the axial answer biasing force of described cylinder body 12, hydraulic oil only enters in the sealed chamber of described piston opposite side by described current limliting through hole 151, make that described structure of piston is simpler, be more prone to processing.Can accurately regulate and control the size of hydraulic oil equally to described piston damping function, and removing the external force that is applied on the described pull bar 2, biasing member when described piston provides along the axial answer biasing force of described cylinder body 12, making described piston slowly, mildly return.In addition, also can be according to the occasion difference of concrete application, by quantity of regulating circulation one-way valve 16 and current limliting through hole 151 and the aperture that allows hydraulic oil to pass through, thereby accurately regulate and control the size of hydraulic oil to described piston damping function, and removing the external force that is applied on the described pull bar 2, biasing member when described piston provides along the axial answer biasing force of described cylinder body 12, making described piston slowly, mildly return.
In addition, in the foregoing description, described cylinder body lid can also adopt another kind of replacement form.In this replacement mode of execution, the sealing cover in the foregoing description forms outside thread near the part of described cylinder body 12 ends, and the screw-internal thread fit of itself and described cylinder body 12 end corresponding sites directly is fixed on the end of described cylinder body 12.Described sealing cover exposes described cylinder part and has radially outstanding flange, so that be pressed on when fastening on the ora terminalis of described cylinder body 12.Such structure can be saved the fixed cover parts.
Have, a replacement form of described cylinder body is that described cylinder body 12 an only end has opening again, the other end is the blind hole end, arranged outside and other parts connection structure connecting at described blind hole end can reduce number of components and parts like this, and structure can be more succinct.
Obviously, the foregoing description only is for example clearly is described, and is not the qualification to mode of execution.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all mode of executions.And conspicuous variation of being extended out thus or change still are among the protection domain of the utility model claim.
Claims (10)
1. a hydraulic damper comprises
A cylinder body (12), described cylinder body (12) has at least one opening end;
Cylinder body covers, and seals the opening end of described cylinder body (12), to form sealed chamber in described cylinder body (12), forms through hole on the end face of one of them described cylinder body lid;
The through hole that a pull bar (2), one end pass on the end face of described cylinder body lid stretches in the described cylinder body (12);
A piston is installed in described pull bar (2) and stretches on the interior end of described cylinder body (12), and described sealed chamber is divided into two-part, and can be along described cylinder body (12) inner wall sealing ground back and forth movement; And
A biasing member is arranged between described piston and the described cylinder body (12), provides along the axial answer biasing force of described cylinder body (12) to described piston;
It is characterized in that:
Described piston is provided with circulation one-way valve (16) and current-limiting apparatus, hydraulic oil in the described sealed chamber of described circulation one-way valve (16) restriction can only flow in the first portion of the described sealed chamber of described piston one side in the second portion of described sealed chamber of described piston opposite side, and described current-limiting apparatus limits the flow rate of hydraulic oil between two-part of described sealed chamber.
2. hydraulic damper according to claim 1 is characterized in that, the described current-limiting apparatus opening (151) that exceeds.
3. hydraulic damper according to claim 1 is characterized in that, described current-limiting apparatus is Check valve of current limiter (152), and described Check valve of current limiter (152) allows the direction of flow of fluid to allow the direction of flow of fluid opposite with described circulation one-way valve (16).
4. hydraulic damper according to claim 1 is characterized in that, described biasing member is the Returnning spring (3) that is arranged between described piston and the described cylinder body lid.
5. the hydraulic damper of stating according to claim 1 is characterized in that, described piston comprises
Piston only (6), described piston only (6) have a cylinder side wall and are arranged on the next door of described cylinder side wall middle part radial arrangement, and described next door is provided with described circulation one-way valve (16) and described current-limiting apparatus; And
Described circulation one-way valve (16) comprises first valve opening of the part taper that is molded on the described next door, be arranged on the valve ball (17) in described first valve opening, first piston lid (4) on end that is fixedly installed on described piston only (6) with through hole, and be arranged on spring (19) between described first piston lid (4) and the described valve ball (17);
Be provided with a slit that is used for the hydraulic oil circulation between described first piston lid (4) and the described next door.
6. hydraulic damper according to claim 5 is characterized in that, described pull bar (2) is connected with described piston by being fixedly attached on the described first piston lid (4); Described through hole on the described first piston lid (4) is for being arranged on the hydraulic oil channel (18) that described pull bar (2) closes on an end of described first piston lid (4), and an end of described hydraulic oil channel (18) is communicated with corresponding described sealed chamber by the sidewall of described pull bar (2); The other end of described hydraulic oil channel (18) is communicated with the slit that is used for the hydraulic fluid circulation between described first piston lid (4) and the described next door.
7. hydraulic damper according to claim 5, it is characterized in that, described current-limiting apparatus comprises second valve opening of the part taper that is molded on the described next door, the tapered direction of described second valve opening is opposite with the tapered direction of described first valve opening, be arranged on the valve ball (17) in described second valve opening, second piston cap (7) on the other end that is fixedly installed on described piston only (6) with through hole, and be arranged on spring (19) between described second piston cap (7) and the described valve ball (17);
Be provided with a slit that is used for the hydraulic fluid circulation between described second piston cap (7) and the described next door.
8. hydraulic damper according to claim 7 is characterized in that, described pull bar (2) is connected with described piston by being fixedly attached on described first piston lid (4) or described second piston cap (7); Described through hole on described first piston lid (4) or described second piston cap (7) is for being arranged on the hydraulic oil channel (18) that described pull bar (2) closes on an end of described piston, and an end of described hydraulic oil channel (18) is communicated with corresponding described sealed chamber by the sidewall of described pull bar (2); The other end of described hydraulic oil channel (18) is communicated with the slit that is used for the hydraulic oil circulation between described first piston lid (4) or described second piston cap (7) and the described next door.
9. hydraulic damper according to claim 1 is characterized in that, described cylinder body lid comprises sealing cover (10,14) and fixed cover (8,13); Be provided with seal ring (5) between the internal surface of described sealing cover (10,14) outer surface and described cylinder body (12) end corresponding position; The outer surface of described fixed cover (8,13) internal surface and described cylinder body (12) end corresponding position is provided with screw thread, so that described fixed cover (8,13) fixes with the corresponding end thread of described cylinder body (12), and described sealing cover (10,14) is pressed in the corresponding end of described cylinder body (12).
10. hydraulic damper according to claim 9, it is characterized in that, in forming the described cylinder body lid of through hole, also comprise pull bar sealed screw cover (9) and pull bar seal ring (11), described sealing cover (10,14) through hole has radially inwardly outstanding boss near an end portion of described sealed chamber, and be provided with the internal thread that matches with the outside thread of described pull bar sealed screw cover (9) away from the inwall of an end portion of described sealed chamber, described pull bar seal ring (11) is positioned at described pull bar sealed screw cover (9) and described sealing cover (10,14) between, along with described pull bar sealed screw cover (9) towards described sealing cover (10,14) tighten, described pull bar seal ring (11) forms described pull bar (2) and described pull bar sealed screw cover (9) and sealing cover (10,14) sealing between.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201811865U CN201326674Y (en) | 2008-12-15 | 2008-12-15 | Hydraulic damper |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201811865U CN201326674Y (en) | 2008-12-15 | 2008-12-15 | Hydraulic damper |
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| CN201326674Y true CN201326674Y (en) | 2009-10-14 |
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| CNU2008201811865U Expired - Fee Related CN201326674Y (en) | 2008-12-15 | 2008-12-15 | Hydraulic damper |
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| CN103216565A (en) * | 2013-03-27 | 2013-07-24 | 杨炯华 | Gas-assisted hydraulic damper |
| CN103352896A (en) * | 2013-07-16 | 2013-10-16 | 安吉宏峰气弹簧科技有限公司 | Telescopic structure unit and telescopic rod composed of same |
| CN104154160A (en) * | 2014-08-11 | 2014-11-19 | 浙江建科减震科技有限公司 | Self-resetting viscous damper |
| CN102537177B (en) * | 2010-12-28 | 2016-12-14 | 日立汽车系统株式会社 | Buffer |
| CN106641058A (en) * | 2016-11-19 | 2017-05-10 | 孙路生 | Spring device and application and product thereof |
| CN107401576A (en) * | 2017-09-14 | 2017-11-28 | 河海大学常州校区 | A kind of pantograph damper |
| CN108071624A (en) * | 2017-08-24 | 2018-05-25 | 深圳市罗伯医疗科技有限公司 | A kind of integrated hydraulic cylinder |
| CN109404467A (en) * | 2018-12-10 | 2019-03-01 | 新昌县万合机械有限公司 | A kind of hydraulic shock-absorbing cylinder |
| CN110566073A (en) * | 2019-10-22 | 2019-12-13 | 宁波市五角阻尼股份有限公司 | Door closer |
| CN110699906A (en) * | 2018-07-09 | 2020-01-17 | 青岛海尔洗衣机有限公司 | Damping device and top-opening type clothes treatment equipment |
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2008
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| CN102537177B (en) * | 2010-12-28 | 2016-12-14 | 日立汽车系统株式会社 | Buffer |
| CN102537177A (en) * | 2010-12-28 | 2012-07-04 | 日立汽车系统株式会社 | Shock absorber |
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| CN103216565A (en) * | 2013-03-27 | 2013-07-24 | 杨炯华 | Gas-assisted hydraulic damper |
| CN103216565B (en) * | 2013-03-27 | 2015-11-25 | 杨炯华 | The hydraulic damper that gas is auxiliary |
| CN103352896A (en) * | 2013-07-16 | 2013-10-16 | 安吉宏峰气弹簧科技有限公司 | Telescopic structure unit and telescopic rod composed of same |
| CN103352896B (en) * | 2013-07-16 | 2015-12-09 | 安吉宏峰气弹簧科技有限公司 | A kind of telescopic structure unit and the flexible rod be made up of this element of construction |
| CN104154160B (en) * | 2014-08-11 | 2017-01-11 | 浙江建科减震科技有限公司 | Self-resetting viscous damper |
| CN104154160A (en) * | 2014-08-11 | 2014-11-19 | 浙江建科减震科技有限公司 | Self-resetting viscous damper |
| CN106641058A (en) * | 2016-11-19 | 2017-05-10 | 孙路生 | Spring device and application and product thereof |
| CN108071624A (en) * | 2017-08-24 | 2018-05-25 | 深圳市罗伯医疗科技有限公司 | A kind of integrated hydraulic cylinder |
| CN107401576A (en) * | 2017-09-14 | 2017-11-28 | 河海大学常州校区 | A kind of pantograph damper |
| CN107401576B (en) * | 2017-09-14 | 2019-06-11 | 河海大学常州校区 | A kind of pantograph damper |
| CN110699906A (en) * | 2018-07-09 | 2020-01-17 | 青岛海尔洗衣机有限公司 | Damping device and top-opening type clothes treatment equipment |
| CN109404467A (en) * | 2018-12-10 | 2019-03-01 | 新昌县万合机械有限公司 | A kind of hydraulic shock-absorbing cylinder |
| CN110566073A (en) * | 2019-10-22 | 2019-12-13 | 宁波市五角阻尼股份有限公司 | Door closer |
| CN114991591A (en) * | 2021-03-01 | 2022-09-02 | 青岛海尔电冰箱有限公司 | Lock catch assembly, door body and refrigerator |
| CN114991591B (en) * | 2021-03-01 | 2024-01-05 | 青岛海尔电冰箱有限公司 | Lock catch assembly, door body and refrigerator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091014 Termination date: 20111215 |