CN202746172U - Novel axial plunger pump - Google Patents
Novel axial plunger pump Download PDFInfo
- Publication number
- CN202746172U CN202746172U CN 201220064342 CN201220064342U CN202746172U CN 202746172 U CN202746172 U CN 202746172U CN 201220064342 CN201220064342 CN 201220064342 CN 201220064342 U CN201220064342 U CN 201220064342U CN 202746172 U CN202746172 U CN 202746172U
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- CN
- China
- Prior art keywords
- plunger
- cylinder body
- disc
- transmission shaft
- pump
- 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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- Details Of Reciprocating Pumps (AREA)
Abstract
The utility model provides a novel axial plunger pump, comprising a front pump body, a middle pump body, a cylinder body, an outer cylinder body, a rear cover and a transmission shaft. The front pump body cooperates with one end of the transmission shaft through a bearing, and the cylinder body sleeves the other end of the transmission shaft. The outer cylinder body is in an interference fit with the outer circumference of the cylinder body, and the middle pump body cooperates with the outer circumference of the outer cylinder body through a needle bearing. The rear cover is disposed at the end part of the transmission shaft and is fixedly connected to one end of the middle pump body, and the other end of the middle pump body is fixedly connected to one end of the front pump body. The end face of the cylinder body is provided with a plunger hole, and the bottom of the plunger hole is provided with a plunger spring. One end of the plunger spring is connected to the bottom part of the plunger hole, and the other end of the plunger spring is connected to one end of a plunger. The end part of the cylinder body is provided with a disc, and one end of the disc abuts against the other end of the plunger, and the other end of the disc cooperates with a tilting disc fixed to an inner cavity of the rear cover. The novel axial plunger pump is advantageous in that the disc contacts with the tilting disc through an end face bearing, and the bottom of the plunger is provided with the plunger spring, enabling the plunger to reset, and thereby the original sliding friction is changed into rolling massage, and quantity of parts is reduced.
Description
Technical field
The utility model belongs to railway switch machine hydraulic system pump technical field, is specifically related to a kind of novel axial plunger pump.
Background technique
In the existing plunger pump structure, plunger is under the effect of central spring, ball pivot and platen, make plunger be close to disc, this kind plunger pump structure complexity, cost is high, and disc directly contacts with swash plate, be sliding friction between disc and the swash plate, wearing and tearing are high, and mechanism efficiency is large, can not meet consumers' demand, therefore be necessary to improve.
The model utility content
The technical problem that the utility model solves: a kind of novel axial plunger pump is provided, and disc contacts with swash plate by the end face bearing, and plunger base design piston spring makes plunger return, original sliding friction is become rolling massage, and reduced number of spare parts.
The technical solution adopted in the utility model: novel axial plunger pump, comprise the front pump housing, middle pump body, cylinder body, outer cylinder body, bonnet and transmission shaft, the described front pump housing by bearing fit at transmission shaft one end, described cylinder body is sleeved on the transmission shaft the other end, outer cylinder body and cylinder body excircle interference fit, described middle pump body cooperates with the outer cylinder body excircle by needle bearing, be covered on end part of driving shaft after described and be fixedly connected with middle pump body one end, the described middle pump body the other end is fixedly connected with the front pump housing one end, described cylinder body end face is shaped with plunger hole, the plunger hole bottom is provided with piston spring, described piston spring one end is connected with the plunger hole bottom, the piston spring the other end is connected with plunger one end, described cylinder ends is provided with disc and disc one end and the plunger the other end and pushes against, and the described disc the other end matches with the swash plate that is fixed on rear cover cavity.
Further, described plunger axis is to being shaped with blind hole, and the described piston spring the other end stretches in the blind hole and is connected with the blind hole bottom.
Further, described disc matches with swash plate by the end face bearing.
Further, the described front pump housing one end is provided with oil distribution casing and oil distribution casing and cylinder ends frictional fit.
Further, described bearing end is provided with cushion cover, oil sealing and lid and transmission shaft is sealed and matched successively.
The utility model advantage compared with prior art:
1, plunger resets by piston spring, has cancelled the drawback that traditional plunger just can reset under the acting in conjunction of central spring, ball pivot and disc, simplifies the structure;
2, contact by the end face bearing between disc and swash plate, original sliding friction is become rolling friction, it is little to wear and tear, and mechanism efficiency is little.
Description of drawings
Fig. 1 is the utility model structural representation;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is the right elevation of Fig. 1;
Fig. 4 is the B-B sectional view of Fig. 1;
Fig. 5 is the A-A sectional view of Fig. 2.
Embodiment
Below in conjunction with accompanying drawing 1,2,3,4,5 a kind of embodiment of the present utility model is described.
Novel axial plunger pump, comprise the front pump housing 7, middle pump body 9, cylinder body 12, outer cylinder body 11, bonnet 19 and transmission shaft 2, the described front pump housing 7 is engaged in transmission shaft 2 one ends by bearing 6, described cylinder body 12 by spline package at transmission shaft 2 the other ends, outer cylinder body 11 and cylinder body 12 excircle interference fit, described middle pump body 9 cooperates with outer cylinder body 11 excircles by needle bearing 10, described bonnet 19 is located at transmission shaft 2 ends and is fixedly connected with middle pump body 9 one ends, bonnet 19 end faces be provided with O RunddichtringO II20 with middle pump body 9 end face joint places, described middle pump body 9 the other ends are fixedly connected with by socket head screw 1 with the front pump housing 7 one ends, and the front pump housing 7 is provided with O RunddichtringO I8 with middle pump body 9 end face joint places, described cylinder body 12 end faces are shaped with plunger hole 24, plunger hole 24 bottoms are provided with piston spring 21, described piston spring 21 1 ends are connected with plunger hole 24 bottoms, piston spring 21 the other ends are connected with plunger 13 1 ends, specifically, described plunger 13 axially is shaped with blind hole 25, described piston spring 21 the other ends stretch in the blind hole 25 and are connected with blind hole 25 bottoms, so can increase the stroke of plunger 13.
Described cylinder body 12 ends are provided with disc 14 and disc 14 1 ends and plunger 13 the other ends and push against, and described disc 14 the other ends match with the swash plate 16 that is fixed on bonnet 19 inner chambers by end face bearing 15.Specifically, swash plate 16 1 ends are fixed on bonnet 19 inner chambers by locating stud 30, fix in the hole in the middle of swash plate 16 the other ends insertion disc 14 and with shaft block ring I17, and cooperate by end face bearing 15 between disc 14 and the swash plate 16, make between disc 14 and the swash plate 16 and form sliding friction.The described front pump housing 7 one ends are fixedly connected with oil distribution casing 18 by locating stud 26, oil distribution casing 18 and cylinder body 12 end frictional fit; Described bearing 6 ends are provided with successively cushion cover 5, oil sealing 4 and cover 3 and are sealed and matched with transmission shaft 2, and bearing 6 ends also are provided with shaft block ring 22, and the front end of lid 3 is provided with the hole with back-up ring 23.
During work, transmission shaft 2 drives cylinder body 12 by spline and rotates, plunger 13 slides along plunger hole 24 under the pressure of piston spring 21, because the effect of swash plate 16 as shown in Figure 5, it is maximum forming sealed volume at Fig. 5 left side plunger 13 and cylinder body 12, and hydraulic oil is under the effect of atmosphere, be pressed into through filler opening 27, be formed on sealed volume for minimum at figure right side plunger 13 and cylinder body 12, hydraulic oil is forced out through oil outlet 28 under the effect of atmosphere.Be shaped with Leak hole 29 at middle pump body 9, hydraulic oil can produce under the effect of pressure and leak, and the hydraulic oil of leakage flows back to fuel tank through Leak hole 29.
Above-described embodiment is preferred embodiment of the present utility model, is not to limit the utility model practical range, so all equivalences of being done with the described content of the utility model claim change, all should be included within the utility model claim scope.
Claims (5)
1. novel axial plunger pump, comprise the front pump housing (7), middle pump body (9), cylinder body (12), outer cylinder body (11), bonnet (19) and transmission shaft (2), the described front pump housing (7) is engaged in transmission shaft (2) one ends by bearing (6), described cylinder body (12) is sleeved on transmission shaft (2) the other end, outer cylinder body (11) and cylinder body (12) excircle interference fit, described middle pump body (9) cooperates with outer cylinder body (11) excircle by needle bearing (10), described bonnet (19) is located at transmission shaft (2) end and is fixedly connected with middle pump body (9) one ends, described middle pump body (9) the other end is fixedly connected with the front pump housing (7) one ends, it is characterized in that: described cylinder body (12) end face is shaped with plunger hole (24), plunger hole (24) bottom is provided with piston spring (21), described piston spring (21) one ends are connected with plunger hole (24) bottom, piston spring (21) the other end is connected with plunger (13) one ends, described cylinder body (12) end is provided with disc (14) and disc (14) one ends and plunger (13) the other end and pushes against, and described disc (14) the other end matches with the swash plate (16) that is fixed on bonnet (19) inner chamber.
2. novel axial plunger pump according to claim 1, it is characterized in that: described plunger (13) axially is shaped with blind hole (25), and described piston spring (21) the other end stretches in the blind hole (25) and is connected bottom blind hole (25).
3. novel axial plunger pump according to claim 1 and 2, it is characterized in that: described disc (14) matches with swash plate (16) by end face bearing (15).
4. novel axial plunger pump according to claim 3 is characterized in that: the described front pump housing (7) one ends are provided with oil distribution casing (18) and oil distribution casing (18) and cylinder body (12) end frictional fit.
5. novel axial plunger pump according to claim 4 is characterized in that: described bearing (6) end is provided with successively cushion cover (5), oil sealing (4) and lid (3) and is sealed and matched with transmission shaft (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220064342 CN202746172U (en) | 2012-02-27 | 2012-02-27 | Novel axial plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220064342 CN202746172U (en) | 2012-02-27 | 2012-02-27 | Novel axial plunger pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202746172U true CN202746172U (en) | 2013-02-20 |
Family
ID=47705574
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220064342 Expired - Fee Related CN202746172U (en) | 2012-02-27 | 2012-02-27 | Novel axial plunger pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202746172U (en) |
-
2012
- 2012-02-27 CN CN 201220064342 patent/CN202746172U/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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130220 Termination date: 20140227 |