CN2388174Y - Hand hydraulic pump - Google Patents
Hand hydraulic pump Download PDFInfo
- Publication number
- CN2388174Y CN2388174Y CN 99239557 CN99239557U CN2388174Y CN 2388174 Y CN2388174 Y CN 2388174Y CN 99239557 CN99239557 CN 99239557 CN 99239557 U CN99239557 U CN 99239557U CN 2388174 Y CN2388174 Y CN 2388174Y
- Authority
- CN
- China
- Prior art keywords
- pump
- piston
- oil
- plunger
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000006071 cream Substances 0.000 claims description 9
- 239000003921 oil Substances 0.000 abstract description 17
- 239000010720 hydraulic oil Substances 0.000 abstract description 3
- 239000002828 fuel tank Substances 0.000 description 3
- 241000269799 Perca fluviatilis Species 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000010734 process oil Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Details Of Reciprocating Pumps (AREA)
- Reciprocating Pumps (AREA)
Abstract
The utility model relates to a hand hydraulic pump. A piston pump, a control unloading valve, an overflow valve and a plunger cylinder are arranged in an oil storage cavity enclosed by a pump body and a pump cover, and the pump body is provided with an oil passage which is communicated with each component. A piston, a push rod and the plunger extend out of the pump cover, and a junction surface of the pump cover and the pump body is higher than the oil surface. The utility model has the advantages that all the components are integrally arranged in the oil storage cavity of the pump body, so all the paths of the hydraulic oil leakage are stopped; simultaneously, each component is arranged on the same vertical plane, so the oil passage processing on the pump body is very simple.
Description
The utility model relates to the lifting elevating gear, specifically, is mounted in a kind of with the hydraulic hand-pump on the floor truck of pallet fork lifting goods.
Hydraulic hand-pump, also claim jack, comprise handle, piston pump, fuel tank, control unloader valve, plunger case, the pump housing and pump cover, piston pump in the existing structure, fuel tank, plunger case and control unloader valve are setting of being separated by of branch chamber, by the oil duct connection, prevent leakage of oil with seal ring between each parts and the pump housing or the pump cover between each parts, liquid level in the fuel tank is higher than the horizontal surface of each seal ring, the performance of seal ring can weaken with the increase of period of service, and therefore, leakage of oil and oil impregnate are common faults.
The purpose of this utility model provides a kind of hydraulic hand-pump, can thoroughly eliminate leakage of oil and oil impregnate phenomenon.
The technical solution of the utility model is: a kind of hydraulic hand-pump, comprise shoe cream room, piston pump, control unloader valve, by pass valve, plunger case, the pump housing and pump cover, the pump housing is provided with the oil duct that is communicated with between each parts, it is characterized in that, described piston pump, control unloader valve, by pass valve, plunger case are arranged in the closed cavity of being enclosed by the pump housing and pump cover, and this closed cavity is shoe cream room; The tappet of the piston of piston pump, control unloader valve and the plunger of plunger case stretch out in pump cover; The faying face of the pump cover and the pump housing is higher than oily plane.
Be further described below in conjunction with embodiment of the present utility model and accompanying drawing thereof.
Accompanying drawing is the structural representation of embodiment.
As shown in drawings, a kind of hydraulic hand-pump, comprise the pump housing 20 and pump cover 4, the piston pump that constitutes by piston 2, spring 6, plunger shaft 9, seal ring 21, by tappet 4, handle the control unloader valve that spool 7, check valve 8,11, flow regulating valve 12 constitute, the by pass valve that constitutes by check valve 16, spring perch 17, overflow spring 18, the plunger case that constitutes by plunger 15, plunger cavity 14; The pump housing is provided with oil duct 10,13 and is communicated with piston pump, control unloader valve, by pass valve, plunger case; Each block construction in the foregoing description, identical with existing hydraulic hand-pump, its principle of work is also identical, repeats no more herein.The characteristics of present embodiment are to be these position component arrangements: the pump housing 20 and pump cover 4 are enclosed a closed cavity and are shoe cream room 19: insert above-mentioned piston pump in this shoe cream room 19, the control unloader valve, by pass valve, plunger, the piston 2 of piston pump, the tappet 5 of control unloader valve and the plunger 15 of plunger case stretch out in pump cover 4, the pump housing 20 connects one handle seat 1 with axle 22, be compressed on the top of piston 2 with the roller 6 of handle set 1 interlock, but insert in handle set 1 with the one handle (not shown) and carry out pump oil with regard to driven plunger 2, the pump housing 20 also is coupling and one handles the top that arm-tie 3 is compressed on tappet 5, affects with a joystick (not shown) and handles arm-tie 3 and just can handle the unloader valve work of controlling; Pump cover 4 is higher than oily plane with the faying face of the pump housing 20, (just in the shoe cream room 19) oil in the pump housing 20 has only a unlimited outlet on pump cover 4 directions, therefore, as long as pump cover 4 closes tightly, oil in the pump housing 20 will not leak into the outside, even 21 wearing and tearing of the seal ring of plunger shaft 9, the hydraulic oil that is leaked out just flows back to shoe cream room, just need open pump cover 4 maintenance until sealing circle 21 complete loss failures; Process oil duct 10,13 for convenience, the axis of piston pump, control unloader valve, by pass valve, plunger case should be sequentially arranged on the same vertical plane surface.
In sum, the utility model has the advantages that all parts integral body with hydraulic hand-pump The inner chamber that is built in the pump housing is in the shoe cream room, has stopped all approach that hydraulic oil leaks; With The time with each arrangements of components on same vertical plane, make the oil duct processing on the pump housing very simple.
Claims (2)
1. hydraulic hand-pump, comprise shoe cream room, piston pump, control unloader valve, by pass valve, plunger case, the pump housing and pump cover, the pump housing is provided with the oil duct that is communicated with between each parts, it is characterized in that, described piston pump, control unloader valve, by pass valve, plunger case are arranged in the closed cavity of being enclosed by the pump housing and pump cover, and this closed cavity is shoe cream room; The tappet of the piston of piston pump, control unloader valve and the plunger of plunger case stretch out in pump cover; The faying face of the pump cover and the pump housing is higher than oily plane.
2. hydraulic hand-pump according to claim 1 is characterized in that the axis of piston pump, control unloader valve, by pass valve, plunger case is sequentially arranged on the same vertical plane surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99239557 CN2388174Y (en) | 1999-09-07 | 1999-09-07 | Hand hydraulic pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99239557 CN2388174Y (en) | 1999-09-07 | 1999-09-07 | Hand hydraulic pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2388174Y true CN2388174Y (en) | 2000-07-19 |
Family
ID=34026791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99239557 Expired - Fee Related CN2388174Y (en) | 1999-09-07 | 1999-09-07 | Hand hydraulic pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2388174Y (en) |
-
1999
- 1999-09-07 CN CN 99239557 patent/CN2388174Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |