CN101700861A - Hydraulic jack with slow decline of load - Google Patents
Hydraulic jack with slow decline of load Download PDFInfo
- Publication number
- CN101700861A CN101700861A CN200910035772A CN200910035772A CN101700861A CN 101700861 A CN101700861 A CN 101700861A CN 200910035772 A CN200910035772 A CN 200910035772A CN 200910035772 A CN200910035772 A CN 200910035772A CN 101700861 A CN101700861 A CN 101700861A
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- oil
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- oil return
- base
- damping
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Abstract
The invention relates to a hydraulic jack with slow decline of a load, which belongs to the field of lifting devices. The hydraulic jack comprises a base, an outer sleeve arranged on the base, an oil cylinder, an oil pump, a piston rod arranged in the oil cylinder, a pressing head arranged at the top of the oil pump, and an oil return passage formed on the base, as well as an oil return valve rod and a steel ball arranged in the oil return passage. The hydraulic jack is characterized in that a compression spring hole, a spring hole, a damping hole and a screw hole are further formed on the oil return passage of the base, a screw, a damping base, a second spring, a first retaining ring and a compression hole are sequentially arranged in the screw hole, the damping hole, the spring hole and the compression spring hole; one end of the oil return valve rod is sheathed on the first spring, the other end is matched with an oil return pedal, and the oil return pedal is pivotally connected on the base; and a first oil passage communicated with a cylinder cavity and the screw hole, a second oil passage communicated with the cylinder cavity and the damping hole and a third oil passage communicated with an oil storage cavity and the oil return passage are formed on the base. The hydraulic jack has the advantages that the hydraulic jack can prolong the fall back time of a heavy object after being jacked up by the jack, improve the safety of an operator and realize simple structure and low cost.
Description
Technical field
The present invention relates to a kind of bont, specifically is the hydraulic jack that a kind of load descends at a slow speed, is the improvement to existing hydraulic jack oil return circuit inner structure.
Background technology
Hydraulic jack on the market mainly comprises base now, be separately fixed at overcoat and oil cylinder on the base, between described overcoat and oil cylinder, be formed with shoe cream room, be arranged at the piston rod in the cylinder chamber of oil cylinder, be located on the base and by the oil pump of oil transportation oil circuit by shoe cream room oil transportation in the cylinder chamber of oil cylinder, what be located at the oil pump top presses hand with the oil pump piston bonded assembly, with be opened in the cylinder chamber that is used for the conducting oil cylinder on the base and the oil return circuit of shoe cream room, and be located at oil returning valve structure in the oil return circuit, described oil returning valve structure comprises oil return valve rod and steel ball, when the hydraulic jack release, unclamp steel ball by rotating the oil return valve rod, hydraulic medium is entered the shoe cream room through the oil return circuit on the base from the cylinder chamber of oil cylinder.This oil returning valve structure, the descending speed of energy held stationary when underloading or unloading decline, but when dropping of load, because the interior pressure in oil cylinder cylinder chamber increases, cause the flow velocity of hydraulic medium to strengthen, it is too fast that institute's top weight is descended, and operator and vehicle are lacked the actv. safety control.
Summary of the invention
Task of the present invention is will provide a kind of can descend at a slow speed when load, and the novel hydraulic jack that after underloading or unloading, can descend fast, it can not only prolong the time of falling after rise behind the jack stand weight effectively, improve safety of operators, reduce load to ground-surface impact, and it is simple in structure, easy to manufacture.
Task of the present invention is finished like this, the hydraulic jack that a kind of load descends at a slow speed, comprise base 12, be separately fixed at overcoat 13 and oil cylinder 15 on the base 12, between described overcoat 13 and oil cylinder 15, be formed with shoe cream room 14, be arranged at the piston rod 23 in the cylinder chamber 18 of oil cylinder 15, be located on the base 12 and by the oil pump 29 of oil transportation oil circuit 30 by shoe cream room 14 oil transportation in the cylinder chamber 18 of oil cylinder 15, what be located at oil pump 29 tops presses hand 31 with the oil pump piston bonded assembly, with the oil return circuit 25 that is opened on the base 12, and be located at oil return valve rod 2 in the oil return circuit 25 and the steel ball 4 that cooperates with oil return valve rod 2, be characterized in: on the oil return circuit 25 of described base 12, also be formed with compression spring hole 22, spring eye 21, damping hole 19 and screw hole 16, described screw hole 16 and damping hole 19, and damping hole 19 and spring eye 21, with respectively form a step between spring eye 21 and the compression spring hole 22, and at screw hole 16, damping hole 19, be disposed with screw 11 in spring eye 21 and the compression spring hole 22, damping seat 8 with draining hole 28, second spring 7, first back-up ring 6, the stage clip 5 that cooperates with steel ball 4; Be arranged with one first spring 3 on an end of described oil return valve rod 2, the other end of oil return valve rod 2 cooperates with an oil return step 1, and described oil return step 1 pivotal joint is on base 12; On described base 12, also offer first oil circuit 17, second oil circuit 20 and the 3rd oil circuit 24 respectively, wherein: an end of first oil circuit 17 communicates with cylinder chamber 18, the other end communicates with screw hole 16, one end of second oil circuit 20 communicates with cylinder chamber 18, the other end communicates with damping hole 19, and an end of the 3rd oil circuit 24 communicates with shoe cream room 14, the other end communicates with oil return circuit 25.
In a specific embodiment of the present invention, constitute bearing fit between described damping seat 8 and the damping hole 19, and between the step surface 26 of front end face 27 that makes damping seat 8 under the effect of second spring 7 and damping hole 19, have certain clearance.
In another specific embodiment of the present invention, be provided with the fuel screen 10 that is used for filtered fluid piezodielectric impurity in the described screw hole 16, fuel screen 10 is positioned at the front end end of screw 11.
In another specific embodiment of the present invention, also be provided with the front end end that second back-up ring, 9, the second back-up rings 9 are positioned at fuel screen 10 in the described screw hole 16, be used for fixing described damping seat 8.
The present invention is owing to have additional the autoinhibition structure on the oil return circuit of base, this autoinhibition structure can utilize the oil pressure before and after the load to change dexterously, make the hydraulic oil in the oil cylinder in the oil return process, can unload oil mass by automatically regulating, can download at a slow speed when the load to obtain, and the effect that can descend fast after underloading or unloading has been guaranteed the safety of using; And simple in structure, cost is low.
Description of drawings
Fig. 1 is an embodiment front view of hydraulic jack of the present invention.
Fig. 2 is the birds-eye view of Fig. 1.
Fig. 3 is the B-B cutaway view among Fig. 2.
Fig. 4 is middle oil return circuit structural representation for the A-A among Fig. 2 analyses and observe.
Fig. 5 is the I portion enlarged drawing among Fig. 4.
Wherein: 1. oil return step, 2. oil return valve rod, 3. first spring, 4. steel ball, 5. stage clip, 6. first back-up ring, 7. second spring, 8. damping seat, 9. second back-up ring, 10. fuel screen, 11. screw, 12. base, 13. overcoat, 14. shoe cream room, 15. oil cylinder, 16. screw hole, 17. first oil circuit, 18. cylinder chamber, 19. damping hole, 20. second oil circuit, 21. spring eye, 22. compression spring hole, 23. piston rod, 24. the 3rd oil circuit, 25. oil return circuit, 26. step surface, 27. front end face, 28. draining hole, 29. oil pump, 30. oil transportation oil circuit, 31. press hand.
The specific embodiment
By the description of applicant, will help to understand the present invention more, and good effect of the present invention is embodied more, but embodiment should not be considered as the restriction to some extent to technical solution of the present invention embodiment.
See also Fig. 1 and in conjunction with Fig. 2, Fig. 3, Fig. 4 and Fig. 5, in the present embodiment, the hydraulic jack roof construction that is disclosed belongs to known prior art, therefore only do simple the description here, it mainly comprises base 12, be separately fixed at overcoat 13 and oil cylinder 15 on the base 12, between described overcoat 13 and oil cylinder 15, be formed with shoe cream room 14, be arranged at the piston rod 23 in the cylinder chamber 18 of oil cylinder 15, be located on the base 12 and by the oil pump 29 of oil transportation oil circuit 30 by shoe cream room 14 oil transportation in the cylinder chamber 18 of oil cylinder 15, what be located at oil pump 29 tops presses hand 31 with the oil pump piston bonded assembly, with the oil return circuit 25 that is opened on the base 12, and be located at oil return valve rod 2 in the oil return circuit 25 and the steel ball 4 that cooperates with oil return valve rod 2.Now done improvement, on described oil return circuit 25, also be formed with compression spring hole 22, spring eye 21, damping hole 19 and screw hole 16, described screw hole 16 and damping hole 19, and damping hole 19 and spring eye 21, and respectively form a step between spring eye 21 and the compression spring hole 22, in screw hole 16, be placed with screw 11, the step place of screw hole 16 has placed second back-up ring 9 and fuel screen 10 successively, in damping hole 19, placed damping seat 8, offered the draining hole 28 of metering function on the damping seat 8, constitute bearing fit between damping seat 8 and the damping hole 19, in spring eye 21, placed second spring 7, placed first back-up ring 6 at the step place of spring eye 21, one end of second spring 7 contacts with first back-up ring 6, the other end of second spring 7 contacts with damping seat 8, damping seat 8 has certain clearance between the step surface 26 of its front end face 27 and damping hole 19 under the effect of second spring, 7 spring forces, be provided with stage clip 5 in the described compression spring hole 22, steel ball 4 has been placed at step place at compression spring hole 22, one end of stage clip 5 contacts with steel ball 4, and the other end of stage clip 5 contacts with first back-up ring 6.Described oil return valve rod 2 is arranged in the oil return circuit 25 of base 12 and corresponding to described steel ball 4, on an end of oil return valve rod 2, be arranged with first spring 3 that is used to reset, the other end of oil return valve rod 2 cooperates with an oil return step 1, and described oil return step 1 pivotal joint is on base 12.The present invention also offers first oil circuit 17, second oil circuit 20 and the 3rd oil circuit 24 respectively on described base 12, wherein: an end of first oil circuit 17 communicates with cylinder chamber 18, the other end of first oil circuit 17 communicates with screw hole 16, one end of second oil circuit 20 communicates with cylinder chamber 18, the other end of second oil circuit 20 communicates with damping hole 19, and an end of the 3rd oil circuit 24 communicates with shoe cream room 14, the other end of the 3rd oil circuit 24 communicates with oil return circuit 25.
Please continue to consult Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5, narrate principle of work of the present invention: when jack when underloading or unloading are replied, because the interior pressure in the oil cylinder 15 is less, damping seat 8 has certain clearance between the step surface 26 of its front end face 27 and damping hole 19 under the effect of second spring, 7 elastic force, the most hydraulic oil in the cylinder chamber 18 of oil cylinder 15 directly by second oil circuit 20 successively through damping hole 19 → spring eye 21 → compression spring hole 22 → and steel ball 4 is opened → got back in the shoe cream room 14 behind oil return circuit 25 → the 3rd oil circuit 24 by oil return valve rod 2 by oil return step 1; Minimum part hydraulic oil in the cylinder chamber 18 of oil cylinder 15 is then passing through screw hole 16 after draining hole 28 on the damping seat 8 and the hydraulic oil in the damping hole 19 compile by first oil circuit 17, and the flow of oil return this moment is bigger, and the speed that piston rod 23 descends is very fast.When the jack load is replied, because the interior pressure in the oil cylinder 15 is bigger, make damping seat 8 overcome the effect of second spring, 7 elastic force, its front end face 27 is fitted fully with the step surface 26 of damping hole 19, substantially cut off the hydraulic oil that flows into from second oil circuit 20, make the hydraulic oil in the cylinder chamber 18 of oil cylinder 15 only can be from first oil circuit 17 successively through draining hole 28 → spring eye, the 21 → compression spring hole 22 on screw hole 16 → fuel screen 10 → damping seat 8 → and steel ball 4 is opened → got back to the shoe cream room 14 behind oil return circuit 25 → the 3rd oil circuit 24 by oil return valve rod 2 by oil return step 1, the flow of oil return this moment is very little, the speed that piston rod 23 descends just becomes slow, play the effect that load descends at a slow speed, thereby can reach the requirement of safe handling.
Claims (4)
1. hydraulic jack that load descends at a slow speed, comprise base (12), be separately fixed at overcoat (13) and oil cylinder (15) on the base (12), between described overcoat (13) and oil cylinder (15), be formed with shoe cream room (14), be arranged at the piston rod (23) in the cylinder chamber (18) of oil cylinder (15), be located on the base (12) and by the oil pump (29) of oil transportation oil circuit (30) by shoe cream room (14) oil transportation in the cylinder chamber (18) of oil cylinder (15), what be located at oil pump (29) top presses hand (31) with the oil pump piston bonded assembly, with the oil return circuit (25) that is opened on the base (12), and be located at oil return valve rod (2) in the oil return circuit (25) and the steel ball (4) that cooperates with oil return valve rod (2), it is characterized in that on the oil return circuit (25) of described base (12), also being formed with compression spring hole (22), spring eye (21), damping hole (19) and screw hole (16), described screw hole (16) and damping hole (19), and damping hole (19) and spring eye (21), with respectively form a step between spring eye (21) and the compression spring hole (22), and in screw hole (16), damping hole (19), be disposed with screw (11) in spring eye (21) and the compression spring hole (22), damping seat (8) with draining hole (28), second spring (7), first back-up ring (6), the stage clip (5) that cooperates with steel ball (4); Be arranged with one first spring (3) on an end of described oil return valve rod (2), the other end of oil return valve rod (2) cooperates with an oil return step (1), and described oil return step (1) pivotal joint is on base (12); On described base (12), also offer first oil circuit (17), second oil circuit (20) and the 3rd oil circuit (24) respectively, wherein: an end of first oil circuit (17) communicates with cylinder chamber (18), the other end communicates with screw hole (16), one end of second oil circuit (20) communicates with cylinder chamber (18), the other end communicates with damping hole (19), and an end of the 3rd oil circuit (24) communicates with shoe cream room (14), the other end communicates with oil return circuit (25).
2. the hydraulic jack that a kind of load according to claim 1 descends at a slow speed, it is characterized in that constituting bearing fit between described damping seat (8) and the damping hole (19), and between the step surface (26) of front end face (27) that makes damping seat (8) under the effect of second spring (7) and damping hole (19), have certain clearance.
3. the hydraulic jack that a kind of load according to claim 1 descends at a slow speed is characterized in that being provided with the fuel screen (10) that is used for filtered fluid piezodielectric impurity in the described screw hole (16), and fuel screen (10) is positioned at the front end end of screw (11).
4. the hydraulic jack that a kind of load according to claim 3 descends at a slow speed, it is characterized in that also being provided with in the described screw hole (16) second back-up ring (9), second back-up ring (9) is positioned at the front end end of fuel screen (10), is used for fixing described damping seat (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910035772A CN101700861A (en) | 2009-10-14 | 2009-10-14 | Hydraulic jack with slow decline of load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910035772A CN101700861A (en) | 2009-10-14 | 2009-10-14 | Hydraulic jack with slow decline of load |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101700861A true CN101700861A (en) | 2010-05-05 |
Family
ID=42155794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910035772A Pending CN101700861A (en) | 2009-10-14 | 2009-10-14 | Hydraulic jack with slow decline of load |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101700861A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102092653A (en) * | 2011-03-11 | 2011-06-15 | 常熟市藕渠针织机械厂 | Oil pressure hoisting jack provided with safe release valve |
| CN102358595A (en) * | 2011-10-11 | 2012-02-22 | 上海航空机械有限公司 | Portable hydraulic jack of airplane |
| CN102718170A (en) * | 2012-06-01 | 2012-10-10 | 常熟通润汽车零部件股份有限公司 | Self-return oil drain valve of hydraulic jack |
| CN103332630A (en) * | 2013-07-23 | 2013-10-02 | 常熟通润汽车零部件股份有限公司 | Hydraulic jack with automatic speed regulation function |
| CN103848374A (en) * | 2014-03-19 | 2014-06-11 | 宁海佰成机械有限公司 | Hydraulic safety system for manual fork truck |
| WO2016183995A1 (en) * | 2015-05-18 | 2016-11-24 | 杭州盈江机械制造有限公司 | Hydraulic oil pump with automatic speed regulation |
| CN107572446A (en) * | 2017-10-31 | 2018-01-12 | 常熟通润汽车修理设备有限公司 | Dolly is transported in one kind lifting |
| CN108059108A (en) * | 2017-12-30 | 2018-05-22 | 广东技术师范学院 | A kind of jack type mobile device and method |
| CN109052209A (en) * | 2018-10-17 | 2018-12-21 | 常熟通润汽车零部件股份有限公司 | Jack oil-returning structure and jack |
| CN109534230A (en) * | 2018-11-20 | 2019-03-29 | 东台市海邦电气有限公司 | A kind of carrying implement main shaft lifting mechanism assembly |
| US11460119B2 (en) | 2019-11-04 | 2022-10-04 | Shinn Fu Corporation | Oil returning valve set with multi-stage throttling control |
-
2009
- 2009-10-14 CN CN200910035772A patent/CN101700861A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102092653A (en) * | 2011-03-11 | 2011-06-15 | 常熟市藕渠针织机械厂 | Oil pressure hoisting jack provided with safe release valve |
| CN102358595A (en) * | 2011-10-11 | 2012-02-22 | 上海航空机械有限公司 | Portable hydraulic jack of airplane |
| CN102718170A (en) * | 2012-06-01 | 2012-10-10 | 常熟通润汽车零部件股份有限公司 | Self-return oil drain valve of hydraulic jack |
| CN102718170B (en) * | 2012-06-01 | 2014-04-02 | 常熟通润汽车零部件股份有限公司 | Self-return oil drain valve of hydraulic jack |
| CN103332630A (en) * | 2013-07-23 | 2013-10-02 | 常熟通润汽车零部件股份有限公司 | Hydraulic jack with automatic speed regulation function |
| CN103848374B (en) * | 2014-03-19 | 2016-08-17 | 宁海佰成机械有限公司 | Manual forklift hydraulic safe system |
| CN103848374A (en) * | 2014-03-19 | 2014-06-11 | 宁海佰成机械有限公司 | Hydraulic safety system for manual fork truck |
| WO2016183995A1 (en) * | 2015-05-18 | 2016-11-24 | 杭州盈江机械制造有限公司 | Hydraulic oil pump with automatic speed regulation |
| CN107572446A (en) * | 2017-10-31 | 2018-01-12 | 常熟通润汽车修理设备有限公司 | Dolly is transported in one kind lifting |
| CN108059108A (en) * | 2017-12-30 | 2018-05-22 | 广东技术师范学院 | A kind of jack type mobile device and method |
| CN108059108B (en) * | 2017-12-30 | 2023-09-22 | 广东技术师范大学 | Jack type moving device and method |
| CN109052209A (en) * | 2018-10-17 | 2018-12-21 | 常熟通润汽车零部件股份有限公司 | Jack oil-returning structure and jack |
| CN109052209B (en) * | 2018-10-17 | 2024-02-20 | 常熟通润汽车零部件股份有限公司 | Jack oil return structure and jack |
| CN109534230A (en) * | 2018-11-20 | 2019-03-29 | 东台市海邦电气有限公司 | A kind of carrying implement main shaft lifting mechanism assembly |
| US11460119B2 (en) | 2019-11-04 | 2022-10-04 | Shinn Fu Corporation | Oil returning valve set with multi-stage throttling control |
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Legal Events
| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20100505 |