CN217816128U

CN217816128U - Lubrication gear-shifting duplex oil pump

Info

Publication number: CN217816128U
Application number: CN202221445594.3U
Authority: CN
Inventors: 李建文; 冯斌林; 刘小东
Original assignee: Taizhong Yuye Changzhi Hydraulic Industry Co ltd
Current assignee: Taizhong Yuye Changzhi Hydraulic Industry Co ltd
Priority date: 2022-06-10
Filing date: 2022-06-10
Publication date: 2022-11-15
Anticipated expiration: 2032-06-10

Abstract

The utility model relates to a lubrication gear-shifting duplex oil pump, which belongs to the technical field of oil pumps; the pump comprises a pump body, wherein end covers are arranged at the left end and the right end of the pump body, a pump assembly is respectively arranged in the left cavity and the right cavity, the two pump assemblies share the same pump shaft, an oil inlet is formed in the middle of the pump body, oil outlets are respectively arranged at the two sides of the oil inlet, the oil inlets are communicated with oil inlet cavities of the two pump assemblies, the oil outlets are respectively connected with pressure oil cavities of the corresponding pump assemblies, an oil return port is also formed in the inner side of the oil inlet, and the oil return port is communicated with the pump shaft; a pin hole which sequentially penetrates through the end covers at the two sides and the pump body is arranged on the oil pump along the axis direction, and a pin shaft is inserted in the pin hole; the pump shaft is provided with a retaining ring groove at the inner side of the end covers at two sides, a retaining ring is arranged in the retaining ring groove, and the retaining rings are respectively contacted with the outer ends of the inner rotors of the two pump assemblies; the problem of present automatic gear derailleur need use two oil pumps to realize lubricated and the helping hand of shifting, the structure is loaded down with trivial details, weight is great is solved.

Description

Lubrication gear-shifting duplex oil pump

Technical Field

The utility model belongs to the technical field of the oil pump, concretely relates to lubricated pair oil pump of shifting.

Background

Along with the rapid development of the agricultural machinery industry in China in recent years, the demand on a high-horsepower tractor is increasingly high, the demand on a tractor transmission, particularly an automatic transmission, is increasingly high, and under the guidance of a new policy of one generation and the same way, all domestic tractor brands are moving towards internationalization, so that the function of the tractor transmission is updated to be a necessary condition for continuous development of enterprises.

SUMMERY OF THE UTILITY MODEL

The utility model overcomes the defects of the prior art and provides a lubricating and gear shifting duplex oil pump; the problem of present automatic gear derailleur need use two oil pumps to realize lubricated and the helping hand of shifting, the structure is loaded down with trivial details, weight is great is solved.

In order to achieve the above purpose, the present invention is achieved by the following technical solutions.

A lubrication and gear shifting dual-unit oil pump comprises a pump body, wherein openings are formed in the left end and the right end of the pump body, cavities are formed in the openings, detachable end covers are arranged at the openings, a pump assembly is arranged in each cavity, the two pump assemblies share the same pump shaft, an oil inlet is formed in the middle of the pump body, an oil outlet is formed in each of two sides of the oil inlet, the oil inlets are communicated with oil inlet cavities of the two pump assemblies, the oil outlets are respectively connected with oil pressing cavities of the corresponding pump assemblies, an oil return opening is formed in the inner side of each oil inlet, and the oil return opening is communicated with the pump shaft; a pin hole which sequentially penetrates through the end covers at the two sides and the pump body is arranged on the oil pump along the axis direction, and a pin shaft is inserted in the pin hole; the pump shaft is provided with a retaining ring groove at the inner sides of the end covers at two sides, a retaining ring is arranged in the retaining ring groove, and the retaining ring is respectively contacted with the outer ends of the inner rotors of the two pump assemblies.

Further, the two pump assemblies are respectively a left pump assembly and a right pump assembly, and the thickness of the left pump assembly is smaller than that of the right pump assembly.

Further, the left pump assembly includes a left inner rotor and a left outer rotor, wherein the left inner rotor is connected to the pump shaft via a flat key, the left outer rotor is fixed inside the left cavity, and the left inner rotor is located inside the left outer rotor and engaged with the left outer rotor.

Furthermore, the right pump assembly comprises a right inner rotor and a right outer rotor, wherein the right inner rotor is connected with the pump shaft through a flat key, the right outer rotor is fixed in the right cavity, and the right inner rotor is positioned on the inner side of the right outer rotor and meshed with the right outer rotor.

Further, the left pump oil outlet and the right pump oil outlet are respectively arranged on the front side and the rear side of the pump body.

Furthermore, the inner edges of the ends, close to the end covers, of the left inner rotor and the right inner rotor are respectively provided with an annular groove, and the end faces of the check rings are in contact with the bottom faces of the annular grooves of the two inner rotors.

Furthermore, the pin holes are stepped holes, the pin shafts are stepped shafts, and the pin shafts are sequentially inserted into the pin holes along different diameters.

The utility model discloses produced beneficial effect for prior art does: two oil pumps with different functions are integrated into one oil pump, and the functions of lubrication and gear shifting assistance can be realized, so that the structure is simplified, the weight is reduced, the occupied space is reduced, and the overall space of the gearbox is saved; due to the fact that the displacement and the pressure of the two pump assemblies are different, a through pin hole and a pin shaft are designed to solve the problem that the radial hydraulic pressure is unbalanced, and the problem that the pump cannot work normally due to the wrong assembling direction can be prevented; an oil return opening is formed in the oil inlet of the pump, so that the lubricating effect of a bearing of the pump shaft is guaranteed, and the service life of the pump is prolonged.

Drawings

The invention will be described in further detail with reference to the accompanying drawings:

fig. 1 is a schematic structural view of the whole of the present invention;

FIG. 2 is an enlarged partial schematic view of FIG. 1;

FIG. 3 isbase:Sub>A sectional view A-A of FIG. 1;

FIG. 4 is a cross-sectional view B-B of FIG. 1;

FIG. 5 is a cross-sectional view C-C of FIG. 1;

wherein, 1 is a pump shaft, 2 is a left inner rotor, 3 is a left outer rotor, 4 is a flat key, 5 is a pump body, 6 is a right outer rotor, 7 is a right inner rotor, 8 is a retainer ring, 9 is a right end cover, 10 is a left end cover, 11 is a pin hole, 12 is a left pump oil outlet, 13 is an oil pump oil outlet, 14 is an oil inlet, and 15 is an oil return port.

Detailed Description

In order to make the technical problem, technical scheme and beneficial effect that the utility model will solve more clearly understand, combine embodiment and attached drawing, it is right to go on further detailed description the utility model discloses. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solution of the present invention is described in detail below with reference to the embodiments and the drawings, but the scope of protection is not limited thereto.

As shown in fig. 1-5, the utility model provides a lubricated pair oil pump of shifting, including the pump body 5, the both ends of the pump body 5 all are provided with the opening, and two openings part are provided with detachable left end lid 10 and right-hand member lid 9 respectively, and left end lid 10 and right-hand member lid 9 are connected with the pump body 5 through the bolt respectively.

The both ends opening part of the pump body 5 is provided with left cavity and right cavity respectively, and the inside left pump subassembly that is provided with of left cavity, the inside right pump subassembly that is provided with of right cavity, pump shaft 1 pass the pump body 5 and are linked together with left cavity and right cavity respectively, and a pump shaft 1 is shared with right pump subassembly to left pump subassembly.

The left pump assembly comprises a left inner rotor 2 and a left outer rotor 3, wherein the left inner rotor 2 is connected with a pump shaft 1 through a flat key 4, and the left inner rotor 2 is driven to rotate through the pump shaft 1. The left outer rotor 3 is fixed inside the left cavity, and the left inner rotor 2 is positioned inside the left outer rotor 3 and meshed with the left outer rotor 3.

The right pump assembly comprises a right inner rotor 7 and a right outer rotor 6, wherein the right inner rotor 7 is connected with the pump shaft 1 through a flat key 4, and the right inner rotor 7 is driven to rotate through the pump shaft 1. The right outer rotor 6 is fixed inside the right cavity, and the right inner rotor 7 is positioned inside the right outer rotor 6 and meshed with the right outer rotor 6.

The thickness of the left inner rotor 2 and the left outer rotor 3 is larger than the thickness of the right inner rotor 7 and the right outer rotor 6.

An oil inlet 14 is formed in the middle of the pump body 5, the oil inlet 14 is connected with an external oil inlet pipeline, and the inner side of the oil inlet 14 is communicated with oil inlet cavities of the left pump assembly and the right pump assembly through two oil inlet pipelines respectively. The pump body 5 is provided with a left pump oil outlet 12 on the left side of the oil inlet 14, a right pump oil outlet on the right side of the oil inlet 14, the inner side of the left pump oil outlet 12 is connected with a pressure oil cavity of the left pump assembly through an oil outlet pipeline, and the inner side of the right pump oil outlet is connected with the pressure oil cavity of the right pump assembly through an oil outlet pipeline.

The left pump oil outlet 12 and the right pump oil outlet are respectively arranged on the front side and the rear side of the pump body 5.

An oil return opening 15 is further formed in the inner side of the oil inlet 14 of the pump body 5, the oil return opening 15 is communicated with the pump shaft 1, and oil lubrication is performed on the surface of the pump shaft 1 through the oil return opening 15.

Both ends of the pump shaft 1 penetrate through the end covers at both sides and extend out of the outer side of the pump body 5. The inner edges of one ends, close to the end covers, of the left inner rotor 2 and the right inner rotor 7 are respectively provided with an annular groove. Left side inner rotor 2 and right side inner rotor 7 all are provided with a 8 grooves of retaining ring with end cover matched with one end, and 8 inslots of retaining ring are provided with retaining ring 8, and the terminal surface of retaining ring 8 contacts with the annular groove bottom surface of two inner rotors to fix a position two inner rotors and pump shaft 1 through two retaining rings 8.

The oil pump is provided with a pin hole 11 along the axis direction, wherein the pin hole 11 is a stepped hole and sequentially penetrates through the left end cover 10, the pump body 5 and the right end cover 9. A pin shaft is inserted into the pin hole 11, is a stepped shaft and is sequentially inserted into the pin hole 11 along different diameters, so that the pin hole 11 corresponds to the pin shaft.

The pump body 5 is made of a ductile iron material QT400-15, so that the forming of a complex inner cavity and high mechanical strength are ensured, and the reliability of the operation of the outer rotor and the pump cavity is ensured. The inner rotor and the outer rotor of the oil pump are both made of powder metallurgy materials and comprise the following components: c (0.6-1.0), cu (1.0-3.0) and Fe in balance, and has high finishing performance, high surface roughness, high strength and high wear resistance, and greatly prolonged service life of oil pump and speed variator. The material of the pump shaft 1 is selected from novel 8620RH, so that the mechanical property after heat treatment is improved, and the service life of the pump shaft 1 is ensured.

Like this carry out the oil feed through an oil inlet 14, then supply out oil of different discharge capacities and pressure to two oil productions respectively through left pump assembly and oil pump assembly, the double pump links simultaneously, and a pump plays lubricated effect, and another pump plays the effect of helping hand of shifting, and is integrated as an organic whole with two pumps that the function is different, has saved the space of gearbox, has alleviateed gearbox weight.

The left pump assembly has the main functions of gear shifting assistance, small displacement and high pressure reaching 3Mpa; the right pump assembly mainly plays a role in lubrication, the pressure is low, the discharge capacity is large, two pumps with different functions are linked through the same pump shaft 1, the structural size is reduced, the two pumps are provided with the same oil inlet 14, in the middle of the pump body 5, the two pumps are provided with respective oil outlets for realizing different functions, and the two ends of the pump body 5 are provided with the oil outlets.

Looking at the position of oil-out, the pump can appear radially receiving the unbalanced problem of hydraulic pressure force in the use, through setting up pinhole 11, downthehole round pin axle will play the function of preventing the pivoted, and simultaneously, this structure can also prevent that the pump from adorning wrong direction and unable normal work.

In order to ensure the reliable performance of the pump, an oil return opening 15 is formed in an oil inlet 14 of the pump, so that the lubricating effect of a bearing of a pump shaft 1 is ensured, and the service life of the pump is prolonged.

In order to ensure the integrity of the pump, reduce the collision of parts and ensure the cleanliness of the pump, end covers are added at two ends of the pump, and in order to reduce the axial movement of the

pump shaft

1, 8 grooves are designed at two ends of the inner rotor.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A lubrication gear-shifting duplex oil pump is characterized in that: the pump comprises a pump body (5), wherein openings are formed in the left end and the right end of the pump body (5), cavities are formed in the openings, detachable end covers are arranged at the openings, a pump assembly is arranged in each of the two cavities, the two pump assemblies share the same pump shaft (1), an oil inlet (14) is formed in the middle of the pump body (5), oil outlets are formed in two sides of the oil inlet (14), the oil inlets (14) are communicated with oil inlet cavities of the two pump assemblies, the oil outlets are respectively connected with oil pressing cavities of the corresponding pump assemblies, oil return openings (15) are further formed in the inner sides of the oil inlets (14), and the oil return openings (15) are communicated with the pump shafts (1); a pin hole (11) which sequentially penetrates through the end covers at the two sides and the pump body (5) is formed in the oil pump along the axis direction, and a pin shaft is inserted in the pin hole (11); a retaining ring groove is formed in the inner side of the end covers on the two sides of the pump shaft (1), a retaining ring (8) is arranged inside the retaining ring groove, and the retaining ring (8) is respectively contacted with the outer ends of inner rotors of the two pump assemblies.

2. The lubricating and shifting dual oil pump of claim 1, wherein: the two pump assemblies are respectively a left pump assembly and a right pump assembly, and the thickness of the left pump assembly is smaller than that of the right pump assembly.

3. The lubricating and shifting dual oil pump of claim 2, wherein: the left pump assembly comprises a left inner rotor (2) and a left outer rotor (3), wherein the left inner rotor (2) is connected with the pump shaft (1) through a flat key (4), the left outer rotor (3) is fixed inside the left cavity, and the left inner rotor (2) is located on the inner side of the left outer rotor (3) and meshed with the left outer rotor (3).

4. The lubricating and shifting dual oil pump of claim 2, wherein: the right pump assembly comprises a right inner rotor (7) and a right outer rotor (6), wherein the right inner rotor (7) is connected with the pump shaft (1) through a flat key (4), the right outer rotor (6) is fixed inside the right cavity, and the right inner rotor (7) is located on the inner side of the right outer rotor (6) and meshed with the right outer rotor (6).

5. The lubricating and shifting dual oil pump according to claim 2, characterized in that: the left pump oil outlet (12) and the right pump oil outlet are respectively arranged on the front side and the rear side of the pump body (5).

6. The lubricating and shifting dual oil pump of claim 2, wherein: the inner edges of one ends, close to the end covers, of the left inner rotor (2) and the right inner rotor (7) are respectively provided with an annular groove, and the end faces of the check rings (8) are in contact with the bottom faces of the annular grooves of the two inner rotors.

7. The lubricating and shifting dual oil pump of claim 1, wherein: the pin holes (11) are stepped holes, the pin shafts are stepped shafts, and the pin shafts are sequentially inserted into the pin holes (11) along different diameters.