CN202879624U - Gapless seal hydraulic reversing system - Google Patents
Gapless seal hydraulic reversing system Download PDFInfo
- Publication number
- CN202879624U CN202879624U CN 201220481404 CN201220481404U CN202879624U CN 202879624 U CN202879624 U CN 202879624U CN 201220481404 CN201220481404 CN 201220481404 CN 201220481404 U CN201220481404 U CN 201220481404U CN 202879624 U CN202879624 U CN 202879624U
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- CN
- China
- Prior art keywords
- reversing shaft
- hole
- pump housing
- reversing
- lifting
- 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
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Abstract
The utility model relates to a gapless seal hydraulic reversing system. The gapless seal hydraulic reversing system comprises a pump body and a reversing shaft. The reversing shaft is in gapless fit with a shaft hole of the pump body, an oil drainage tank is machined in the outer side wall of the reversing shaft, an outlet end of the oil drainage tank is connected with an oil drainage port of the pump body, an inlet end of the oil drainage tank is arranged on a side edge of a dropping oil hole, and two through holes in the pump body are respectively communicated with the inlet end of the oil drainage tank and the dropping oil hole in a dropping state. The gapless seal hydraulic reversing system is ingenious in design, convenient to use, strong in practicability and high in cost performance, and in addition, the gapless seal hydraulic reversing system has the advantages of being good in sealing effect, long in service life, high in safe reliability, strong in market competitiveness and the like.
Description
Technical field
The utility model relates to the driver's cab turnover lifting device in the automobile technical field, especially a kind of gap-free sealed hydraulic reversing system.
Background technology
Hydraulic reversing system in the driver's cab turnover lifting device is the important foundation that guarantees the lifting state, this hydraulic reversing system mainly is made of the pump housing and reversing shaft, reversing shaft is inserted in the pump housing, be shaped with two lifting oilholes and a falling oilhole on the reversing shaft, be shaped with two through holes that are used for installing oil nozzle on the pump housing, lead to the hole site is corresponding with the lifting oilhole.All adopt the free-running fit mounting means between reversing shaft and the pump housing at present, so that make oil product enter fuel tank through the gap by pump housing draining orifice flow, therefore when obtaining accurately lift location, obtain again good leak tightness, to guarantee the safety of whole lifting process.The most domestic product all adopts traditional O type circle sealing now, and to having relatively high expectations of sealing member, frequent commutation can cause seal degree to reduce, even oil leakage phenomenon occurs.Although external product has solved this technical barrier, price is very expensive, and enterprise is difficult to bear expensive cost of equipment.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of simple in structure, reasonable in design, cost is low and the gap-free sealed hydraulic reversing system of good sealing effect.
The utility model solves its technical matters and is achieved through the following technical solutions:
A kind of gap-free sealed hydraulic reversing system, comprise the pump housing and reversing shaft, be shaped with axis hole on the pump housing, reversing shaft is inserted in this axis hole, reversing shaft inside is shaped with axial cavity, be shaped with the fuel feed hole that is communicated with this cavity on the reversing shaft, two lifting oilholes and a falling oilhole, two lifting oilholes are positioned at same side, fall oilhole after rise and be positioned at another side, be shaped with two through holes that are used for connecting oil nozzle on the pump housing, these two through holes are connected with two lifting oilholes respectively when being in the lifting state, it is characterized in that: cooperate for gapless between reversing shaft and the pump housing axis hole, make a drain pan on the lateral wall of reversing shaft, the exit end of this drain pan is connected with pump housing draining hole, the entrance point of this drain pan is positioned at and falls the oilhole side after rise, and two through holes when being in the falling state on the pump housing are connected with entrance point and the falling oilhole of drain pan respectively.
And a commutation pin-and-hole is made in the end of described reversing shaft, and the reversing shaft outside face between commutation pin-and-hole and fuel feed hole is coaxial makes a boss.
Advantage of the present utility model and beneficial effect are:
1, the pump housing of native system and reversing shaft adopt the gapless fit structure, and make drain pan on the reversing shaft, oil product can enter fuel tank by pump housing draining orifice flow through this drain pan, therefore use this product when obtaining accurately lift location, obtain again good leak tightness, guaranteed the safe reliability of whole lifting process.
2, the coaxial boss of making of reversing shaft outside face between commutation pin-and-hole and fuel feed hole, oil product was excessive when this boss can prevent oil suction.
3, the reversing shaft of native system adopts the environmental protection coating technology, has then reached special seal requirement between the pump housing and the reversing shaft by special processing, has replaced traditional sealing means.In addition, novel coating technology has also increased resistance to abrasion and the anti-corrosive properties of this product, and improve ten times than original technique the service life of product.
4, the native system cost performance is high, same Product Precision, quality and working ability, and the similar product of cost ratio hangs down 50%, and technical service is more quick and economical than foreign-made merchant especially.
The plurality of advantages such as 5, the utility model is a kind of gap-free sealed hydraulic reversing system ingenious, easy to use, practical, that cost performance is high that designs, and native system has good sealing effect, long service life, security and stability is high, the market competitiveness is strong.
Description of drawings
Fig. 1 is cutaway view of the present utility model (lifting state);
Fig. 2 is the left view of Fig. 1;
Fig. 3 is cutaway view of the present utility model (falling state);
Fig. 4 is the scheme drawing one (showing the lifting oilhole) of reversing shaft;
Fig. 5 is the scheme drawing two (show and fall oilhole and drain pan after rise) of reversing shaft.
The specific embodiment
The utility model is described in further detail below by specific embodiment, and following examples are descriptive, is not determinate, can not limit protection domain of the present utility model with this.
A kind of gap-free sealed hydraulic reversing system comprises the pump housing 1 and reversing shaft 2, is shaped with an axis hole on the pump housing, and reversing shaft is inserted in this axis hole.An axial cavity 3 is made in reversing shaft inside, built-in steel ball 8 and the spring of being placed with of this cavity.Make the fuel feed hole 7 that is communicated with cavity, two lifting oilholes 4 and a falling oilhole 11 on the reversing shaft, two lifting oilholes are positioned at same side, fall oilhole after rise and be positioned at another side, be shaped with two through holes that are used for connecting oil nozzle 5 on the pump housing, as shown in Figure 1, when being in the lifting state, these two through holes are connected with two lifting oilholes respectively.Because above structure is prior art, therefore no longer give unnecessary details.
Innovative point of the present utility model is: cooperate installation for gapless between reversing shaft and the pump housing axis hole, make a drain pan 9 at the lateral wall of reversing shaft, the exit end of this drain pan is communicated with pump housing draining hole 10, and the entrance point of this drain pan is positioned at and falls the oilhole side after rise.As shown in Figure 3, when being in the falling state, two through holes on the pump housing are connected with entrance point and the falling oilhole of drain pan respectively.
A commutation pin-and-hole 13 that is used for plug-in mounting reversing pin 6 is made in the end of reversing shaft, the coaxial boss 12 of making of reversing shaft outside face between commutation pin-and-hole and fuel feed hole, and this boss can play the excessive effect of oil product when preventing oil suction.
Principle of work of the present utility model is:
1, lifting process
The arm shaft upward movement, drive on the plunger axis and move, steel ball rises from the oil-sucking hole oil suction, and arm shaft moves downward, steel ball falls the sealing oil-sucking hole after rise, utilize oil pressure that the steel ball in the reversing shaft is opened, oil is headed in the reversing shaft, when two lifting oilholes of reversing shaft are connected oil nozzle, hydraulic oil flows into elevating ram through an oil nozzle, oil product forms circulation by flowing into reversing shaft from another oil nozzle, plays castering action.
2, falling process
The arm shaft upward movement, drive on the plunger axis and move, steel ball rises from the oil-sucking hole oil suction, and arm shaft moves downward, and steel ball falls the sealing oil-sucking hole after rise, utilize oil pressure that the steel ball in the reversing shaft is opened, oil is headed in the reversing shaft, and when the falling oilhole was aimed at oil nozzle with drain pan, hydraulic oil flowed into elevating ram with the oil cylinder roof fall through falling the oilhole oil nozzle after rise, oil product enters fuel tank through the reversing shaft drain pan by pump housing draining orifice flow, and this is the decline process.
Claims (3)
1. gap-free sealed hydraulic reversing system, comprise the pump housing and reversing shaft, be shaped with axis hole on the pump housing, reversing shaft is inserted in this axis hole, reversing shaft inside is shaped with axial cavity, be shaped with the fuel feed hole that is communicated with this cavity on the reversing shaft, two lifting oilholes and a falling oilhole, two lifting oilholes are positioned at same side, fall oilhole after rise and be positioned at another side, be shaped with two through holes that are used for connecting oil nozzle on the pump housing, these two through holes are connected with two lifting oilholes respectively when being in the lifting state, it is characterized in that: cooperate for gapless between reversing shaft and the pump housing axis hole, make a drain pan on the lateral wall of reversing shaft, the exit end of this drain pan is connected with pump housing draining hole, the entrance point of this drain pan is positioned at and falls the oilhole side after rise, and two through holes when being in the falling state on the pump housing are connected with entrance point and the falling oilhole of drain pan respectively.
2. gap-free sealed hydraulic reversing system according to claim 1 is characterized in that: a commutation pin-and-hole is made in the end of described reversing shaft.
3. gap-free sealed hydraulic reversing system according to claim 2 is characterized in that: the reversing shaft outside face between commutation pin-and-hole and fuel feed hole is coaxial makes a boss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220481404 CN202879624U (en) | 2012-09-19 | 2012-09-19 | Gapless seal hydraulic reversing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220481404 CN202879624U (en) | 2012-09-19 | 2012-09-19 | Gapless seal hydraulic reversing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202879624U true CN202879624U (en) | 2013-04-17 |
Family
ID=48071080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220481404 Expired - Fee Related CN202879624U (en) | 2012-09-19 | 2012-09-19 | Gapless seal hydraulic reversing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202879624U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102837744A (en) * | 2012-09-19 | 2012-12-26 | 天津市恒信精密机械有限公司 | Gapless sealing hydraulic reversing device |
| CN107738698A (en) * | 2017-11-07 | 2018-02-27 | 中国重汽集团南充海乐机械有限公司 | A kind of durable in use, lightweight hydraulic lifting system |
-
2012
- 2012-09-19 CN CN 201220481404 patent/CN202879624U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102837744A (en) * | 2012-09-19 | 2012-12-26 | 天津市恒信精密机械有限公司 | Gapless sealing hydraulic reversing device |
| CN102837744B (en) * | 2012-09-19 | 2016-03-23 | 天津市恒信精密机械有限公司 | Gap-free sealed hydraulic commutator |
| CN107738698A (en) * | 2017-11-07 | 2018-02-27 | 中国重汽集团南充海乐机械有限公司 | A kind of durable in use, lightweight hydraulic lifting system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130417 Termination date: 20140919 |
|
| EXPY | Termination of patent right or utility model |