CN202746188U - Oil feed pump with wear-resistant inner gear - Google Patents
Oil feed pump with wear-resistant inner gear Download PDFInfo
- Publication number
- CN202746188U CN202746188U CN 201220346357 CN201220346357U CN202746188U CN 202746188 U CN202746188 U CN 202746188U CN 201220346357 CN201220346357 CN 201220346357 CN 201220346357 U CN201220346357 U CN 201220346357U CN 202746188 U CN202746188 U CN 202746188U
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- Prior art keywords
- gear
- cavity
- internal gear
- wear
- external gear
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Abstract
The utility model discloses an oil feed pump with a wear-resistant inner gear. The oil feed pump comprises a pump body, an inner gear, an outer gear and a pump cover which is fixed on the pump body, wherein the outer gear and a through hole are arranged on the same centre line; a centre line of the inner gear deviates from the centre line of the outer gear and the through hole; a reference circle of the outer gear is internally tangent with a reference circle of the inner gear; the outer gear is engaged with the inner gear; a spacer block is formed in a hollow cavity and arranged between the inner gear and the outer gear; a lining is fixed on an outer ring of the inner gear; a plurality of grooves are formed in the inner wall of the hollow cavity; a wear-resistant layer is arranged on the outer wall of the lining and contacted with the inner wall of the hollow cavity; and the hardness of the wear-resistant layer is smaller than the hardness of the inner wall of the hollow cavity. According to the utility model, as the lining is arranged between the inner walls of the inner gear and the cavity of the pump body and the wear-resistant layer is arranged on the outer wall of the lining, the wear of the outer ring of the inner gear is reduced under high-speed rotation of the outer and inner gears, so that the service life of the oil feed pump is improved.
Description
Technical field:
The utility model relates to the gear pump field, the internal gear wear-resisting type oil feed pump of using more specifically to a kind of gearbox.
Background technique:
Existing gearbox oil feed pump generally is internal gear and is meshed with external gear, the standard pitch circle phase inscribe of the standard pitch circle of external gear and internal gear, the drive external gear rotation of motor, external gear has just driven the internal gear rotation, in violent rotation, can make the wearing and tearing of internal gear outer ring, reduce the working life of oil feed pump, reduce working efficiency, needed in time to repair, improved cost.
The model utility content:
The purpose of this utility model is exactly the deficiency for prior art, and provide a kind of internal gear wear-resisting type oil feed pump, it is provided with lining between the cavity inner wall of internal gear and the pump housing, outer wall at lining arranges wearing layer simultaneously, so that external gear and internal gear are under High Rotation Speed, reduce the wearing and tearing of the outer ring of internal gear, improve the working life of oil feed pump.
Technology solution of the present utility model is as follows:
A kind of internal gear wear-resisting type oil feed pump, comprise the pump housing, internal gear, external gear and the pump cover that is fixed on the pump housing, form the through hole of vertical perforation in the middle of the pump housing, the coupling shaft sleeve is in through hole, and be fixedly connected in the external gear, the centre of the pump housing forms cavity, internal gear and external gear sleeve are in cavity, external gear and through hole are on same center line, the center line of internal gear departs from the center line of external gear and through hole, the standard pitch circle phase inscribe of the standard pitch circle of external gear and internal gear, external gear and internal gear are meshed, and form spacer block in the cavity, spacer block is between internal gear and external gear, lining is fixed on the outer ring of internal gear, forms many grooves on the inwall of cavity, and the outer wall of lining is provided with wearing layer, wearing layer contacts with the inwall of cavity, and wearing layer hardness is less than the inwall of cavity.
Described spacer block is crescent shape, and spacer block, internal gear and external gear make cavity be divided into oil sucting cavity and pumping cavity.
Described wearing layer is ceramic wearing coat, and coupling shaft is hollow shaft.
The beneficial effects of the utility model are:
It is provided with lining between the cavity inner wall of internal gear and the pump housing, outer wall at lining arranges wearing layer simultaneously, so that external gear and internal gear under High Rotation Speed, reduce the wearing and tearing of the outer ring of internal gear, only need resleeve just, improve the working life of oil feed pump; Simultaneously, form many grooves at the inwall of cavity, improved the effect of heat radiation.
Description of drawings:
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation between the pump housing of the present utility model, internal gear and the external gear.
Among the figure: 1, the pump housing; 11, spacer block; 12, cavity; 13, groove; 121, oil sucting cavity; 122, pumping cavity; 2, internal gear; 3, external gear; 4, pump cover; 5, coupling shaft; 6, lining; 7, wearing layer.
Embodiment:
Embodiment: see shown in Fig. 1 to 2 that a kind of internal gear wear-resisting type oil feed pump comprises the pump housing 1, internal gear 2, external gear 3 and is fixed on pump cover 4 on the pump housing 1, moulding in the middle of the pump housing 1
The through hole that vertical perforation is arranged, coupling shaft 5 sleeves are in through hole, and be fixedly connected in the external gear 3, the cavity 12 that the centre of the pump housing 1 forms, internal gear 2 and external gear 3 sleeves are in cavity 12, external gear 3 and through hole are on same center line, the center line of internal gear 2 departs from the center line of external gear 3 and through hole, the standard pitch circle phase inscribe of the standard pitch circle of external gear 3 and internal gear 2, external gear 3 and internal gear 2 are meshed, form spacer block 11 in the cavity 12, spacer block 11 is between internal gear 2 and external gear 3, lining 6 is fixed on the outer ring of internal gear 2, forms many grooves 13 on the inwall of cavity 12, and the outer wall of lining 6 is provided with wearing layer 7, wearing layer 7 contacts with the inwall of cavity 12, and wearing layer 7 hardness are less than the inwall of cavity 12.
Described spacer block 11 is crescent shape, and spacer block 11, internal gear 2 and external gear 3 make cavity 12 be divided into oil sucting cavity 121 and pumping cavity 122.
Described wearing layer 7 is ceramic wearing coat, and coupling shaft 5 is hollow shaft.
Working principle: rotate by driven by motor coupling shaft 5, coupling shaft 5 drives external gear 3 and rotates, external gear 3 drives internal gear 2 and rotates, and realizes oil suction and force feed, owing to be provided with lining 6 between cavity 12 inwalls of internal gear 2 and the pump housing 1, outer wall at lining 6 arranges wearing layer 7 simultaneously, so that external gear 3 and internal gear 2 under High Rotation Speed, reduce the wearing and tearing of the outer ring of internal gear 2, simultaneously, inwall at cavity 12 forms many grooves 14, has improved the effect of heat radiation.
Claims (3)
1. internal gear wear-resisting type oil feed pump, comprise the pump housing (1), internal gear (2), external gear (3) and be fixed on pump cover (4) on the pump housing (1), form the through hole of vertical perforation in the middle of the pump housing (1), coupling shaft (5) sleeve is in through hole, and be fixedly connected in the external gear (3), the centre of the pump housing (1) forms cavity (12), internal gear (2) and external gear (3) sleeve are in cavity (12), it is characterized in that: external gear (3) and through hole are on same center line, the center line of internal gear (2) departs from the center line of external gear (3) and through hole, the standard pitch circle phase inscribe of the standard pitch circle of external gear (3) and internal gear (2), external gear (3) and internal gear (2) are meshed, form spacer block (11) in the cavity (12), spacer block (11) is between internal gear (2) and external gear (3), lining (6) is fixed on the outer ring of internal gear (2), form many grooves (13) on the inwall of cavity (12), the outer wall of lining (6) is provided with wearing layer (7), wearing layer (7) contacts with the inwall of cavity (12), and wearing layer (7) hardness is less than the inwall of cavity (12).
2. a kind of internal gear wear-resisting type oil feed pump according to claim 1, it is characterized in that: described spacer block (11) is crescent shape, and spacer block (11), internal gear (2) and external gear (3) make cavity (12) be divided into oil sucting cavity (121) and pumping cavity (122).
3. a kind of internal gear wear-resisting type oil feed pump according to claim 1, it is characterized in that: described wearing layer (7) is ceramic wearing coat, and coupling shaft (5) is hollow shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220346357 CN202746188U (en) | 2012-07-17 | 2012-07-17 | Oil feed pump with wear-resistant inner gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220346357 CN202746188U (en) | 2012-07-17 | 2012-07-17 | Oil feed pump with wear-resistant inner gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202746188U true CN202746188U (en) | 2013-02-20 |
Family
ID=47705589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220346357 Expired - Lifetime CN202746188U (en) | 2012-07-17 | 2012-07-17 | Oil feed pump with wear-resistant inner gear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202746188U (en) |
-
2012
- 2012-07-17 CN CN 201220346357 patent/CN202746188U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Oil feed pump with wear-resistant inner gear Effective date of registration: 20171213 Granted publication date: 20130220 Pledgee: Agricultural Bank of China Limited by Share Ltd. Xinchang county subbranch Pledgor: ZHEJIANG ZHONGCHAI MACHINERY Co.,Ltd. Registration number: 2017330000276 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20190718 Granted publication date: 20130220 Pledgee: Agricultural Bank of China Limited by Share Ltd. Xinchang county subbranch Pledgor: ZHEJIANG ZHONGCHAI MACHINERY Co.,Ltd. Registration number: 2017330000276 |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130220 |