CN207813916U - A kind of oil pump - Google Patents
A kind of oil pump Download PDFInfo
- Publication number
- CN207813916U CN207813916U CN201721682071.XU CN201721682071U CN207813916U CN 207813916 U CN207813916 U CN 207813916U CN 201721682071 U CN201721682071 U CN 201721682071U CN 207813916 U CN207813916 U CN 207813916U
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- CN
- China
- Prior art keywords
- oil
- gear
- oil return
- pump housing
- cover board
- 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.)
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Abstract
The utility model discloses a kind of oil pumps,Including the pump housing,Pump housing ecto-entad is equipped with seal mounting hole successively,Bearing mounting hole,The oily boss of gear and gear cavity,Oil sealing is located in seal mounting hole,Bearing is located in bearing mounting hole,External gear and internal gear are located in gear cavity and are intermeshed,Cover board covers gear cavity and is mounted on the pump housing by screw,The inner end of splined shaft sequentially passes through oil sealing,Bearing,It is connect with internal gear by spline after the oily boss of gear,The outer ring of internal gear is fixed with bushing,The outer wall of bushing is equipped with wearing layer,The outboard end of splined shaft is for connecting transmission main shaft,The oily boss of gear and splined shaft clearance fit,The spline of internal gear is equipped with oil return notch,The pump housing is equipped with pump housing oil return hole,Cover board is equipped with cover board oil return hole,Cover board oil return hole and pump housing oil return hole interconnect,Its middle pump body oil return hole input end is located at seal mounting hole bottom,Cover board oil return hole outlet end connects with transmission oil shell phase.
Description
Technical field
The utility model is related to a kind of oil pump, more particularly to a kind of oil pump belongs to oil pump internal gear equipment technical field.
Background technology
Existing transmission oil pump is typically mounted on front end cover assembly, including the pump housing, cover board, external gear, internal gear, flower
The components such as key axis, bearing, transmission oil pump are directly driven by splined shaft by transmission main shaft, since pump housing side does not allow to leak
Oil, therefore splined shaft needs to install additional oil sealing for sealing close to the position of pump housing side, prevents splined shaft from leaning on the oil leak of pump housing side end face.
The high pressure oil that pump housing internal gear face leakage comes out is blocked by oil sealing, these are needed to set on the pump housing by the high pressure oil that oil sealing blocks
It sets an oil return hole and oil is led back into oilcan, but is due to gearbox compact-sized, the oil return hole of oil sealing can not be by theoretical size
Design causes the oil return capacity of oil return hole insufficient, the high pressure oil of oil pump face leakage will to generating very high pressure at oil sealing,
And oil sealing leads to speed changer exception oil leak phenomena such as easy ting produce poor sealing, advanced wear after bearing high pressure, and then damage
Speed changer, meanwhile, gearbox oil feed pump generally is internal gear and is meshed with external gear, the reference circle of external gear and internal gear
Reference circle phase inscribe, the drive external gear rotation of motor, external gear has just driven internal gear rotation, in violent rotation, meeting
So that internal gear outer ring is worn, reduces the service life of oil feed pump, reduce working efficiency, need to repair in time, improve cost.
Utility model content
The utility model proposes a kind of oil pump, solve it is compact-sized due to gearbox in the prior art, oil sealing
Oil return hole by theoretical size design, can not cause the oil return capacity of oil return hole insufficient, and the high pressure oil of oil pump face leakage will be right
Very high pressure is generated at oil sealing, and oil sealing causes to become phenomena such as easy ting produce poor sealing, advanced wear after bearing high pressure
Fast device exception oil leak, and then speed changer is damaged, meanwhile, gearbox oil feed pump generally is internal gear and is meshed with external gear, outside
The reference circle phase inscribe of the reference circle of gear and internal gear, the drive external gear rotation of motor, external gear have just driven internal gear
Rotation can be such that internal gear outer ring wears, reduce the service life of oil feed pump, reduce working efficiency in violent rotation, need
The problem of repairing in time, improve cost.
In order to solve the above-mentioned technical problem, the utility model provides the following technical solution：
A kind of oil pump of the utility model, including the pump housing, external gear, cover board, internal gear, splined shaft, bearing, oil sealing, it is described
Pump housing ecto-entad is equipped with the oily boss of seal mounting hole, bearing mounting hole, gear and gear cavity successively, and the oil sealing is located at oil sealing peace
It fills in hole, the bearing is located in bearing mounting hole, and the external gear and internal gear are located in gear cavity and are intermeshed, described
Cover board covers gear cavity and is mounted on the pump housing by screw, and the inner end of the splined shaft sequentially passes through oil sealing, bearing, gear oil
It is connect with internal gear by spline after boss, the outer ring of the internal gear is fixed with bushing, is set on the outer wall of the bushing
There is wearing layer, the outboard end of splined shaft is for connecting transmission main shaft, the oily boss of the gear and the splined shaft clearance fit, institute
The spline for stating internal gear is equipped with oil return notch, and the pump housing is equipped with pump housing oil return hole, and the cover board is equipped with cover board oil return
Hole, cover board oil return hole and pump housing oil return hole interconnect, and middle pump body oil return hole input end is located at seal mounting hole bottom, cover board
Oil return hole outlet end connects with transmission oil shell phase.
As a kind of optimal technical scheme of the utility model, the wearing layer is in ceramic wearing coat, with gear cavity
Wall is in contact, and the hardness of wearing layer is less than the inner wall hardness of gear cavity.
It is heavy that decompression is equipped with as a kind of optimal technical scheme of the utility model, between the gear cavity and gear oil boss
Hole.
As a kind of optimal technical scheme of the utility model, the spline of the internal gear is equipped with multiple circumferentially symmetrical
The oil return notch of distribution.
As a kind of optimal technical scheme of the utility model, the oil sealing is C-shaped oil sealing, and the bearing is cylinder needle roller
Bearing.
The advantageous effect that the utility model is reached is：A kind of oil pump of the utility model is equipped with due to inner gear spline
Oil return notch is clearance fit between splined shaft and the oily boss of gear, can be to avoid generating high pressure oil at oil sealing, and oil sealing will not be because
Oil leak or advanced wear are caused for the high pressure of inside, oily boss is kept off and has blocked most of oil stream to oil sealing so that returning at oil sealing
The phenomenon of oilhole oil return capacity deficiency is all alleviated, and avoids oil sealing and bears high pressure and causes speed change after oil leak or advanced wear
Device oil, which enters on the outside of the pump housing, damages speed changer, to improve the reliability of speed changer, while internal gear and the pump housing
It is provided with bushing between cavity inner wall, while wearing layer is set on the outer wall of bushing so that external gear and internal gear are in high speed
Under rotation, the abrasion of the outer ring of internal gear is reduced, it is only necessary to which resleeve just, improves the service life of oil feed pump.
Description of the drawings
Attached drawing is used to provide a further understanding of the present invention, and a part for constitution instruction, with this practicality
Novel embodiment for explaining the utility model, does not constitute limitations of the present invention together.In the accompanying drawings：
Fig. 1 is the subjective structural schematic diagram of the utility model；
Fig. 2 is the partial structural diagram of the utility model；
In figure：1, the pump housing；2, external gear；3, cover board；4, internal gear；5, splined shaft；6, oily boss is kept off；7, bearing；8, subtract
Sink hole；9, oil sealing；10, bushing；11, gear cavity；12, pump housing oil return hole；13, seal mounting hole；14, bearing mounting hole；
15, wearing layer；31, cover board oil return hole.
Specific implementation mode
The preferred embodiment of the utility model is illustrated below in conjunction with attached drawing, it should be understood that described herein excellent
It selects embodiment to be only used for describing and explaining the present invention, is not used to limit the utility model.
Embodiment 1
As shown in Figs. 1-2, the utility model provides a kind of oil pump, including the pump housing 1, external gear 2, cover board 3, internal gear 4, flower
Key axis 5, bearing 7, oil sealing 9,1 ecto-entad of the pump housing are equipped with the oily boss of seal mounting hole 13, bearing mounting hole 14, gear successively
6 and gear cavity 11, the oil sealing 9 be located in seal mounting hole 13, the bearing 7 is located in bearing mounting hole 14, the external tooth
Wheel 2 and internal gear 4 are located in gear cavity 11 and are intermeshed, and the cover board 3 covers gear cavity 11 and is mounted on pump by screw
On body 1, the inner end of the splined shaft 5 sequentially passes through after the oily boss of oil sealing 9, bearing 7, gear 6 through spline and the company of internal gear 4
It connects, the outer ring of the internal gear 4 is fixed with bushing 10, and the outer wall of the bushing 10 is equipped with wearing layer 15, splined shaft 5
Outboard end is for connecting transmission main shaft, the oily boss 6 of the gear and 5 clearance fit of the splined shaft, the spline of the internal gear 4
It is equipped with oil return notch, the pump housing 1 is equipped with pump housing oil return hole 12, and the cover board 3 is equipped with cover board oil return hole 31, cover board
Oil return hole 31 and pump housing oil return hole 12 interconnect, and 12 input end of middle pump body oil return hole is located at 13 bottom of seal mounting hole, lid
31 outlet end of plate oil return hole connects with transmission oil shell phase.
The wearing layer 15 is ceramic wearing coat, is in contact with the inner wall of gear cavity 11, and the hardness of wearing layer 15 is less than
The inner wall hardness of gear cavity 11, will not injure the inner wall of gear cavity while wear-resisting.Between the gear cavity 11 and gear oil boss 6
Equipped with decompression counterbore 8.The spline of the internal gear 4 is equipped with multiple circumferentially symmetrical oil return notches.The oil sealing 9 is
C-shaped oil sealing, the bearing 7 are cylinder needle bearing.
Specifically, inner gear spline is equipped with oil return notch, and it is clearance fit between splined shaft and the oily boss of gear, so
Most of oil directly flows back to speed changer oilcan by the oil return notch in inner gear spline, only small part oil by splined shaft with
Gap between the oily boss of gear reaches at oil sealing, and then this small part oil flows back to speed change further through the oil return hole on the pump housing and cover board
, thus can be to avoid high pressure oil be generated at oil sealing in device oilcan, oil sealing will not cause oil leak because of the high pressure of inside or carry
Preceding abrasion.Also, since the oily boss of gear has blocked most of oil stream to oil sealing so that the oil return hole oil return capacity at oil sealing is insufficient
The phenomenon that all alleviated, avoid oil sealing and bear high pressure and oil leak or advanced wear Rear Derailleur oil is caused to enter on the outside of the pump housing
Speed changer is damaged, meanwhile, under high speed rotation, village's set and wearing layer play a protective role for external gear and internal gear,
Reduce the abrasion of the outer ring of internal gear.
A kind of oil pump of the utility model is since inner gear spline is equipped with oil return notch, between splined shaft and the oily boss of gear
, can be to avoid high pressure oil be generated at oil sealing for clearance fit, oil sealing will not cause oil leak because of the high pressure of inside or grind in advance
Damage keeps off oily boss and has blocked most of oil stream to oil sealing so that the phenomenon of the oil return hole oil return capacity deficiency at oil sealing is by whole
Alleviation is fallen, and avoids oil sealing and bears high pressure oil leak or advanced wear Rear Derailleur oil is caused to enter on the outside of the pump housing to cause speed changer
Damage to improve the reliability of speed changer, while being provided with bushing between internal gear and the cavity inner wall of the pump housing, while
Wearing layer is set on the outer wall of bushing so that external gear and internal gear reduce the mill of the outer ring of internal gear under high speed rotation
Damage, it is only necessary to which resleeve just, improves the service life of oil feed pump.
Finally it should be noted that：The above descriptions are merely preferred embodiments of the present invention, is not limited to this
Utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art
For, it still can be with technical scheme described in the above embodiments is modified, or to which part technical characteristic
Carry out equivalent replacement.Within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on,
It should be included within the scope of protection of this utility model.
Claims (5)
1. a kind of oil pump, including the pump housing (1), external gear (2), cover board (3), internal gear (4), splined shaft (5), bearing (7), oil sealing
(9), which is characterized in that the pump housing (1) ecto-entad is equipped with seal mounting hole (13), bearing mounting hole (14), gear oil successively
Boss (6) and gear cavity (11), the oil sealing (9) are located in seal mounting hole (13), and the bearing (7) is located at bearing mounting hole
(14) in, the external gear (2) and internal gear (4) are located in gear cavity (11) and are intermeshed, and the cover board (3) covers gear
Chamber (11) is simultaneously mounted on by screw on the pump housing (1), the inner end of the splined shaft (5) sequentially pass through oil sealing (9), bearing (7),
It is connect with internal gear (4) by spline after the oily boss (6) of gear, the outer ring of the internal gear (4) is fixed with bushing (10), institute
The outer wall for stating bushing (10) is equipped with wearing layer (15), and the outboard end of splined shaft (5) is for connecting transmission main shaft, the gear oil
The spline of boss (6) and the splined shaft (5) clearance fit, the internal gear (4) is equipped with oil return notch, the pump housing (1)
It is equipped with pump housing oil return hole (12), the cover board (3) is equipped with cover board oil return hole (31), cover board oil return hole (31) and pump housing oil return
Hole (12) interconnects, and middle pump body oil return hole (12) input end is located at seal mounting hole (13) bottom, cover board oil return hole (31)
Outlet end connects with transmission oil shell phase.
2. a kind of oil pump according to claim 1, which is characterized in that the wearing layer (15) is ceramic wearing coat, with tooth
The inner wall of wheel chamber (11) is in contact, and the hardness of wearing layer (15) is less than the inner wall hardness of gear cavity (11).
3. a kind of oil pump according to claim 1, which is characterized in that between the gear cavity (11) and the oily boss (6) of gear
Equipped with decompression counterbore (8).
4. a kind of oil pump according to claim 1, which is characterized in that the spline of the internal gear (4) is equipped with multiple edges
Circumferential symmetrical oil return notch.
5. a kind of oil pump according to claim 1, which is characterized in that the oil sealing (9) is C-shaped oil sealing, the bearing (7)
For cylinder needle bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721682071.XU CN207813916U (en) | 2017-12-06 | 2017-12-06 | A kind of oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721682071.XU CN207813916U (en) | 2017-12-06 | 2017-12-06 | A kind of oil pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207813916U true CN207813916U (en) | 2018-09-04 |
Family
ID=63335266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721682071.XU Active CN207813916U (en) | 2017-12-06 | 2017-12-06 | A kind of oil pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207813916U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109931489A (en) * | 2019-04-08 | 2019-06-25 | 湖南机油泵股份有限公司 | A kind of impeller pump convenient for remaining oil liquid to be discharged into oil sump |
-
2017
- 2017-12-06 CN CN201721682071.XU patent/CN207813916U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109931489A (en) * | 2019-04-08 | 2019-06-25 | 湖南机油泵股份有限公司 | A kind of impeller pump convenient for remaining oil liquid to be discharged into oil sump |
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| GR01 | Patent grant |