CN102052357A - Jack hydraulic part with function of automatically regulating descending speed - Google Patents
Jack hydraulic part with function of automatically regulating descending speed Download PDFInfo
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- CN102052357A CN102052357A CN2010105994477A CN201010599447A CN102052357A CN 102052357 A CN102052357 A CN 102052357A CN 2010105994477 A CN2010105994477 A CN 2010105994477A CN 201010599447 A CN201010599447 A CN 201010599447A CN 102052357 A CN102052357 A CN 102052357A
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- oil
- oil return
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- circuit
- valve rod
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Abstract
The invention discloses a jack hydraulic part with a function of automatically regulating the descending speed. The jack hydraulic part provided by the invention is characterized in that an automatic flow limiter and an oil return valve rod assembly are arranged in a high-pressure oil release circuit system; an O-shaped sealing loop is arranged on a flow limiter fixing seat; a throttling port is formed on a positioning sleeve; a compression spring is contained in the positioning sleeve; the outer circle of a piston and the inner hole of the positioning sleeve form a sliding pair in a clearance fit mode with a shaft hole; a sealing ring is arranged in the sliding pair; a damping hole is formed in the center of the piston; the left end surface of the piston is positioned by the inner end surface of the flow limiter fixing seat and provided with an oil return circuit communicated with a diversion trench; an oil circuit at the left end of an oil return check valve steel ball is communicated with an annular through-flow cavity on the periphery of the positioning sleeve of the automatic flow limiter; and the left end surface of a release valve rod is provided with the oil return check valve steel ball. The jack hydraulic part provided by the invention has the beneficial effect that the safety of releasing hoisted loads and the equipment safety are guaranteed.
Description
Technical field
The present invention relates to a kind of hoist hydraulic unit, be to implement to control automatically the hydraulic unit that hoist comes directly towards the hoist of rate of descent fully under the high pressure of this loaded article in the process with manually-operable oil circuit relief valve behind a kind of jacking weight specifically.
Background technique
The Hydraulic for lifting load equipment, be widely used in every field, especially the aspect effects such as rectification on jacking automobile, general weight and special building basis are particularly outstanding, consider from intensity, carrying capacity yet traditional hydraulic jack is many, only demand and afford to push up, set aside concerns, volume does not produce permanent deformation or the like after carrying down and using, and ignores the may command to hoist rate of descent under the heavy duty for a long time.In general, non-this field professional and technical personnel's hoist user is often when discharging the oil return valve rod, the speed that unscrews screw thread is difficult to control, revolve not open, be exactly one to unscrew the oil return valve rod, high pressure oil in the hydraulic system promptly promptly returns into shoe cream room, causes the huge vibrations of jacking thing even makes the body of hoist be subjected to major injury and lost efficacy.How to solve such puzzlement, Chinese patent ZL200420078326.8 discloses a kind of hydraulic unit that has the hydraulic slow release device, it will discharge oil circuit and be arranged to oil return valve rod front and back section, sealing respectively, concrete structure is to be provided with oil return valve rod, Sealing on the oil cylinder seat, to establish drain pan and damping hole etc. on the oil return valve rod, so that the oil return valve rod when being released, can have the rate of descent of level ground control jack hoist.The author has carried out careful research with regard to this patent scheme, finds that this scheme implementation difficulty is higher, and especially its processability of product structure is relatively poor, and again, its structure can not realize infinitely regulating oil return speed.
Summary of the invention
The objective of the invention is to deficiency at above-mentioned correlation technique scheme, propose a kind ofly in general personnel operation hydraulic jack, can easily unscrew scavenger valve, and the lotus size of refusing to take a passenger is controlled the safe release organization plan of oil return flow in real time automatically, to overcome the deficiencies in the prior art, the operability of this tool-type product is improved and guarantee to use steadily and reliable.
Above-mentioned purpose of the present invention is achieved through the following technical solutions: a kind of hoist hydraulic unit with automatic adjusting reduction of speed, comprise oil cylinder seat, pump housing parts, cylinder part, piston rod part, the top cap member, outer casing part, the oil suction line system, press oily oil-way system and high pressure oil to discharge circuit system, it is characterized by: discharge in the circuit system at high pressure oil, be provided with the groove oil circuit that is communicated with shoe cream room and guiding gutter respectively, between the high-pressure oil passage of groove oil circuit and straight-through oil cylinder working oil chamber, be provided with automatic current limiting device and oil return valve rod assembly, on the restrictor fixed base, be provided with O-ring seals, on setting sleeve, offer restriction, hold stage clip in the setting sleeve, outside piston and setting sleeve endoporus form the sliding pair of axis hole Spielpassung, and in this sliding pair, be provided with seal ring, center at piston offers damping hole, implement to connect firmly sealing with screw pair three and Sealing between setting sleeve and the restrictor fixed base, the piston left side is located by the interior edge face of restrictor fixed base, in the oil return valve body, be provided with the one-way valve steel ball, and on its entity, offered the oil return circuit of linking up with guiding gutter; Return check valve steel ball left end oil circuit is communicated with the annular through-flow chamber of the setting sleeve periphery of automatic current limiting device, be provided with radial direction seal ring between oil return valve body left end section cylindrical and the annular through-flow chamber, discharging valve rod adopts screw pair two to connect with the oil return valve body, the left side that discharges valve rod is provided with the return check valve steel ball, be provided with the sealing of screw pair one and angle between oil return valve body and the oil cylinder seat, and be provided with by discharging the mobile revolute pair that has low pressure seal that valve rod and oil return valve body are formed in the right-hand member section of screw pair two.
The beneficial effect that the present invention compared with prior art has is: owing to reset complete hyraulic controlled type backflow throttling arrangement in the unidirectional valve seat of tradition inside, make manipulation oil return valve rod no longer need to be grasped the Security that stronger technology ability can guarantee to discharge lifting loads thing and equipment itself, significantly reduce the risk in the oil return release.
Description of drawings
Embodiment's description of drawings:
Figure 1 shows that the plan view of technical solution of the present invention;
Fig. 2 is relative Fig. 1 of the present invention " D-D " sectional view;
Fig. 3 is the partial bottom view of the relative Fig. 1 of the present invention;
Fig. 4 is relative Fig. 1 of the present invention " A-A " sectional view;
Fig. 5 is the present invention's " B-B " sectional view on Fig. 1;
Fig. 6 is the present invention's " C-C " sectional view on Fig. 3;
Fig. 7 is that the present invention's ratio on Fig. 2 is 2: 1 partial enlarged drawing I.
The component title is as follows shown in each label of accompanying drawing:
1 oil cylinder seat, 2 pump housing parts, 3 pump cores, 4 pressure springs, 5 cylinder parts, 6 outer casing parts, 7 shoe cream rooms, 8 top cap members, 9 pump housing oil pockets, 10 oil return valve rod assemblies, 11 one-way valve steel balls, 12 oil return circuits, 13 screw pairs, one, 14 screw pair two, 15 moves revolute pair, and 16 discharge valve rod, 17 radial direction seal rings, 18 jiaos of sealings, 19 guiding gutters, 20 groove oil circuits, 21 automatic current limiting devices, 22 O-ring seals, 23 oil cylinder working oil chambers, 24 high-pressure oil passages, 25 current limliting filler openings, 26, setting sleeve, 27 restrictor fixed bases, 28 screw pairs, three, 29 Sealings, 30 damping holes, 31 pistons, 32 seal rings, 33 stage clips, 34 restrictions, 35 annular through-flow chambeies, 36 oil suction lines, one, 37 oil suction line, two, 38 oil sucting one-way valve steel balls, 39 pressure regulation oil circuits, 40 pressure regulator valve steel balls, 41 spring seats, 42 pressure adjusting springs, 43 pressure regulating screw assemblies, 44 screw pairs, four, 45 pressure limiting draining chambeies, 46 press oily one-way valve steel ball, and 47 press oil circuit one, 48 to press oily oil circuit two, 49 press oil circuit three, 50 piston rod parts, 51 oil return valve bodies.
Embodiment
The invention will be further described below in conjunction with embodiment's accompanying drawing, will help the understanding to this case technology contents and effect, but embodiment do not constitute the restriction to the technical program.
By each accompanying drawing as seen, embodiments of the invention are building a kind of new structure schemes that redesign forms to the oil return circuit system on conventional hydraulic hoist basis, mainly contain its whole composition: respectively with separately screw pair connection, with top cap member 8 piston rod part 50, outer casing part 6 are connected firmly on oil cylinder seat 1 between cylinder part 5, pump housing parts 2 and the oil cylinder seat 1; With the entity periphery that pressure spring 4 is inserted in pump housing parts 2, the one end is positioned on the oil cylinder seat 1, the end face of the other end and pump core 3 connects firmly, and pump core 3 is inserting pump housing parts 2 back formation pump housing oil pockets 9; Form shoe cream room 7 in the outer casing part 6; In oil cylinder seat 1, be provided with basic oil suction line 1, oil suction line 2 37, oil sucting one-way valve steel ball 38, and be provided with and press oil circuit 1, press oil circuit 48, press oil circuit 3 49, again at oil sucting one-way valve steel ball 38 and press between the oily one-way valve steel ball 46 and be provided with pressure regulation oil circuit 39, pressure regulator valve steel ball 40, spring seat 41, pressure adjusting spring 42, pressure limiting draining chamber 45, pressure regulating screw assembly 43, and with screw pair 4 44 with pressure regulating screw assembly 43 preset pressures be fixed in the oil cylinder seat 1; In oil return system, be provided with the groove oil circuit 20 that is communicated with shoe cream room 7 and guiding gutter 19 respectively, between the high-pressure oil passage 24 of groove oil circuit 20 and straight-through oil cylinder working oil chamber 23, be provided with automatic current limiting device 21 and oil return valve rod assembly 10; The composition situation of automatic current limiting device 21 is as follows: be provided with the O-ring seals 22 as the sealing of hole between centers on restrictor fixed base 27, on setting sleeve 26, offer restriction 34, hold stage clip 33 in the setting sleeve 26, from the opening of setting sleeve 26 piston 31 of packing into, piston 31 cylindricals and setting sleeve 26 endoporus form the sliding pair of axis hole Spielpassung, and implement the hole shaft sealing with seal ring 32; Offer damping hole 30 in the center of piston 31, to form from the oil pressure of high-pressure oil passage 24 oil pressure pressure difference in current limliting filler opening 25 places and damping hole 30 right-hand member outlet ports; Implement to connect firmly sealing with screw pair 3 28 and Sealing 29 between setting sleeve 26 and the restrictor fixed base 27; The degrees of freedom that it is moved to the left is eliminated by the interior edge face of restrictor fixed base 27 location in piston 31 left sides; The composition situation of oil return valve rod assembly 10 then is: be provided with one-way valve steel ball 11 in oil return valve body 51, and offered the oil return circuit 12 of linking up with guiding gutter 19 on its entity; Return check valve steel ball left end oil circuit is communicated with the annular through-flow chamber 35 of setting sleeve 26 peripheries of automatic current limiting device 21, and with the sealing between radial direction seal ring 17 enforcement oil return valve body 51 left end section cylindricals and the annular through-flow chamber 35, discharging valve rod 16 adopts screw pair 2 14 to connect with oil return valve body 51, the left side that discharges valve rod 16 is used for tightening or unclamps return check valve steel ball 11, and with the sealing 18 of screw pair 1 and angle oil return valve body 51 and oil cylinder seat 1 are connected firmly and seal, and formed by discharging the mobile revolute pair 15 that has low pressure seal that valve rod 16 and oil return valve body 51 are formed in the right-hand member section of screw pair 2 14.
The embodiment of the invention is to use like this: the valve seat of at first closing return check valve steel ball 11, make pump core 3 after left dislocation, discharge the effect of extrapolability, just displacement to the right under the elastic return of pressure spring 4 of pump core 3, hydraulic oil in the shoe cream room 7 is just through oil suction line 1, oil suction line 2 37, oil sucting one-way valve steel ball 38 is inhaled into pump housing oil pocket 9, when pump core 3 is pressed into left, high pressure oil in the pump housing oil pocket 9 is through pressing oil circuit 1, press oil circuit 2 48, press the valve seat of oily one-way valve steel ball 46, press oil circuit 3 49 to be pressed into oil cylinder working oil chamber 23, with this reciprocation cycle, constantly make piston rod part 50 outside jacking weights.Hoist is after lifting is finished using, desire to put down the automobile or the weight of lifting, just should unscrew discharging valve rod 16, make one-way valve steel ball 11 leave its valve seat, at this moment, high pressure oil in the oil cylinder working oil chamber is at first through high-pressure oil passage 24, current limliting filler opening 25, damping hole 30 enters the die cavity that holds stage clip 33, again through restriction 34, the through-flow chamber 35 of annular, return check valve steel ball 11, oil return circuit 12, guiding gutter 19, groove oil circuit 20 flows into shoe cream room 7, piston rod part 50 just descends with the loaded article that is positioned at its top, because the high pressure oil oil pressure that place, two apertures exists about damping hole 30 is poor, when loaded article very heavy, be that oil liquid pressure is when big, the high oil pressure of the left end of piston 31 will force piston to overcome the displacement of the differential property of being used as of spring force to the right, piston left end section cylindrical just can cover partial throttling mouth 34, the flow of approach restriction 34 is reduced, thereby reduce the retractility reduction of speed of the piston rod part of hoist, cause piston rod part 50 more slowly steadily with the loaded article decline displacement movement that is positioned at its top, otherwise, induced pressure hour, the energy of this stepped piston 31 is just less, piston 31 displacement amount to the right reduces, the fluid that will cause the big flow restriction 34 of flowing through finally flows back to shoe cream room 7 and causes the loaded article on the piston rod part to descend safely with fast speeds.Realize realizing the rate of descent of step-less adjustment hoist thus with the flow area that infinitely changes restriction 34.
Claims (5)
1. hoist hydraulic unit with automatic adjusting reduction of speed, comprise oil cylinder seat, pump housing parts, cylinder part, piston rod part, the top cap member, outer casing part, the oil suction line system, press oily oil-way system and high pressure oil to discharge circuit system, it is characterized by: discharge in the circuit system at high pressure oil, be provided with the groove oil circuit (20) that is communicated with shoe cream room (7) and guiding gutter (19) respectively, between the high-pressure oil passage (24) of groove oil circuit (20) and straight-through oil cylinder working oil chamber (23), be provided with automatic current limiting device (21) and oil return valve rod assembly (10), on restrictor fixed base (27), be provided with O-ring seals (22), on setting sleeve (26), offer restriction (34), hold stage clip (33) in the setting sleeve (26), piston (31) cylindrical and setting sleeve (26) endoporus form the sliding pair of axis hole Spielpassung, and in this sliding pair, be provided with seal ring (32), offer damping hole (30) in the center of piston (31), the oil return circuit (12) of linking up with guiding gutter (19) has been offered by the interior edge face of restrictor fixed base (27) location in piston (31) left side on oil return valve body (51) entity; Return check valve steel ball left end oil circuit is communicated with the annular through-flow chamber (35) of setting sleeve (26) periphery of automatic current limiting device (21), and the left side that discharges valve rod (16) is provided with return check valve steel ball (11).
2. the hoist hydraulic unit with automatic adjusting reduction of speed according to claim 1 is characterized in that: be provided with screw pair three (28) and Sealing (29) between setting sleeve (26) and the restrictor fixed base (27).
3. the hoist hydraulic unit with automatic adjusting reduction of speed according to claim 1 is characterized in that: be provided with radial direction seal ring (17) between oil return valve body (51) left end section cylindrical and the annular through-flow chamber (35).
4. the hoist hydraulic unit with automatic adjusting reduction of speed according to claim 1 is characterized in that: be provided with screw pair one (13) and angle sealing (18) between oil return valve body (51) and the oil cylinder seat (1).
5. the hoist hydraulic unit with automatic adjusting reduction of speed according to claim 1, it is characterized in that: discharge between valve rod (16) and the oil return valve body (51) and be provided with screw pair two (14), be provided with by discharging the mobile revolute pair (15) that has low pressure seal that valve rod (16) and oil return valve body (51) are formed in the right-hand member section of screw pair two (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105994477A CN102052357A (en) | 2010-12-22 | 2010-12-22 | Jack hydraulic part with function of automatically regulating descending speed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105994477A CN102052357A (en) | 2010-12-22 | 2010-12-22 | Jack hydraulic part with function of automatically regulating descending speed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102052357A true CN102052357A (en) | 2011-05-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105994477A Pending CN102052357A (en) | 2010-12-22 | 2010-12-22 | Jack hydraulic part with function of automatically regulating descending speed |
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| Country | Link |
|---|---|
| CN (1) | CN102052357A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016149968A1 (en) * | 2015-03-23 | 2016-09-29 | 常熟通润汽车零部件股份有限公司 | Oil returning structure |
| CN107313996A (en) * | 2017-08-23 | 2017-11-03 | 山东弘宇农机股份有限公司 | A kind of oil cylinder of adjustable decrease speed |
| CN109795960A (en) * | 2019-02-15 | 2019-05-24 | 杭州富阳诺德液压技术有限公司 | A kind of high-order transport top |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6042085A (en) * | 1998-12-15 | 2000-03-28 | Tang; Kun-Jui | Jack for extending the lifting piston quickly |
| US20080006330A1 (en) * | 2006-07-05 | 2008-01-10 | Zhou Huasong | A Throttle Mechanism |
| CN101513982A (en) * | 2009-02-18 | 2009-08-26 | 常熟通润汽车零部件股份有限公司 | Oil return structure of hydrostatic trigger |
| CN201339622Y (en) * | 2009-01-20 | 2009-11-04 | 常熟通润汽车零部件股份有限公司 | Novel hydraulic position-limiting structure |
| CN201902383U (en) * | 2010-12-22 | 2011-07-20 | 常熟通润汽车零部件股份有限公司 | Lifting jack hydraulic part with automatic adjusting and decelerating function |
-
2010
- 2010-12-22 CN CN2010105994477A patent/CN102052357A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6042085A (en) * | 1998-12-15 | 2000-03-28 | Tang; Kun-Jui | Jack for extending the lifting piston quickly |
| US20080006330A1 (en) * | 2006-07-05 | 2008-01-10 | Zhou Huasong | A Throttle Mechanism |
| CN201339622Y (en) * | 2009-01-20 | 2009-11-04 | 常熟通润汽车零部件股份有限公司 | Novel hydraulic position-limiting structure |
| CN101513982A (en) * | 2009-02-18 | 2009-08-26 | 常熟通润汽车零部件股份有限公司 | Oil return structure of hydrostatic trigger |
| CN201902383U (en) * | 2010-12-22 | 2011-07-20 | 常熟通润汽车零部件股份有限公司 | Lifting jack hydraulic part with automatic adjusting and decelerating function |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016149968A1 (en) * | 2015-03-23 | 2016-09-29 | 常熟通润汽车零部件股份有限公司 | Oil returning structure |
| CN107313996A (en) * | 2017-08-23 | 2017-11-03 | 山东弘宇农机股份有限公司 | A kind of oil cylinder of adjustable decrease speed |
| CN107313996B (en) * | 2017-08-23 | 2023-08-11 | 山东弘宇农机股份有限公司 | Oil cylinder capable of adjusting descending speed |
| CN109795960A (en) * | 2019-02-15 | 2019-05-24 | 杭州富阳诺德液压技术有限公司 | A kind of high-order transport top |
| CN109795960B (en) * | 2019-02-15 | 2024-03-08 | 杭州富阳诺德液压技术有限公司 | High-order top of transporting |
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| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110511 |