CN220769699U

CN220769699U - Direction-adjustable gearbox lubricating oil pump

Info

Publication number: CN220769699U
Application number: CN202322271067.6U
Authority: CN
Inventors: 沈强
Original assignee: Taicang Jikaian Transmission Technology Co ltd
Current assignee: Taicang Jikaian Transmission Technology Co ltd
Priority date: 2023-08-23
Filing date: 2023-08-23
Publication date: 2024-04-12
Anticipated expiration: 2033-08-23

Abstract

The utility model provides a direction-adjustable gearbox lubricating oil pump, which comprises a pump cover and a pump body which are mutually fixed, wherein an inner rotor and an outer rotor are accommodated in the pump cover and the pump body, and the inner rotor and the outer rotor can rotate at different speeds and different axes in the inner part of the outer rotor; the method is characterized in that: an eccentric flange capable of synchronously rotating along with the outer rotor is arranged between the outer rotor and the inner wall of the pump body, and a limiting pin is arranged on the eccentric flange and is in limiting fit with the pump body to limit the movement stroke of the eccentric flange; when the eccentric flange rotates from one end of the semicircular annular limiting groove with the central angle of 180 degrees to the other end, the eccentric flange fixed with the eccentric flange is limited and stops rotating because the cylindrical pin is blocked by the limiting groove, and at the moment, the outer rotor continues to synchronously rotate along with the inner rotor, and the eccentric distance is reversed because the eccentric flange rotates 180 degrees, so that the eccentric distances of the inner rotor shaft and the outer rotor shaft are also reversed, and the oil suction port and the oil discharge port can be kept unchanged.

Description

Direction-adjustable gearbox lubricating oil pump

Technical Field

The utility model relates to the technical field of gearboxes, in particular to a direction-adjustable gearbox lubricating oil pump.

Background

The cycloidal pump is a gear pump which utilizes inter-tooth sealing volume change to realize oil absorption and pressure oil, and is widely applied to low-pressure occasions, however, most of the existing cycloidal pumps rotate unidirectionally, if the existing cycloidal pumps run reversely, oil absorption and pressure oil ports need to be adjusted, and for lubrication and cooling occasions of a gearbox, the cycloidal pumps generally drive an inner rotor through a motor to realize lubrication and cooling of parts needing lubrication according to a specified flow direction, but the existing gearbox always has a forward gear and a reverse gear at the same time, the steering of the inner rotor connected with a driving shaft can be correspondingly changed in the forward gear and the reverse gear, the change of the steering of the inner rotor can lead to the change of the oil absorption and pressure oil ports, and the oil absorption and pressure oil ports need not to be changed in the actual use manufacturing process, so that certain limitation is brought to the application.

Accordingly, there is a need to provide a direction-adjustable lubrication pump for a gearbox, which overcomes the above-mentioned drawbacks and disadvantages of the prior art.

Disclosure of Invention

Therefore, in order to solve the defects and shortcomings in the prior art, the utility model provides the direction-adjustable gearbox lubricating oil pump.

The technical scheme provided by the utility model is as follows:

the direction-adjustable gearbox lubricating oil pump comprises a pump cover and a pump body which are mutually fixed, wherein an inner rotor and an outer rotor are accommodated in the pump cover and the pump body, and the inner rotor and the outer rotor can rotate at different speeds and different axes in the inner part of the outer rotor; the method is characterized in that: an eccentric flange capable of synchronously rotating along with the outer rotor is arranged between the outer rotor and the inner wall of the pump body, and a limiting pin is arranged on the eccentric flange and is in limiting fit with the pump body to limit the movement stroke of the eccentric flange.

As a further preferable implementation mode of the utility model, the pump cover is provided with a pump cover hole, the pump body is provided with a pump body hole, and the mounting piece sequentially passes through the pump cover hole and the pump body hole to realize the fixed connection between the pump cover and the pump body.

As a further preferred embodiment of the present utility model, the mounting member includes at least a positioning member and a fixing member.

As a further preferable embodiment of the present utility model, the outer wall of the inner rotor is provided with external teeth, the inner wall of the outer rotor is provided with internal teeth, and the inner rotor is connected with the internal teeth of the outer rotor through the external teeth in a meshing manner, and the number of external teeth is 1 less than the number of internal teeth.

As a further preferred embodiment of the present utility model, the rotational speed of the inner rotor is greater than the rotational speed of the outer rotor.

As a further preferred embodiment of the present utility model, the eccentricity of the eccentric flange and the eccentricity of the inner rotor and the outer rotor are equal.

As a further preferred embodiment of the utility model, the inner wall of the eccentric flange is in clearance fit with the outer wall of the outer rotor.

As a further preferable embodiment of the present utility model, an elastic piece groove is formed in the inner wall of the eccentric flange, and an elastic piece is provided in the elastic piece groove.

As a further preferable implementation mode of the utility model, a limit groove is formed in the pump body, one end of the limit pin is fixedly connected with the eccentric flange, and the other end of the limit pin is positioned in the limit groove.

As a further preferable embodiment of the utility model, the limit groove is arranged in a semicircular arc ring shape with a central angle of 180 degrees.

The beneficial effects obtained by the utility model relative to the prior art include:

1) The utility model provides a direction-adjustable gearbox lubricating oil pump, when the steering of an inner rotor changes, the steering of the outer rotor also changes along with the change and drives an eccentric flange to rotate, when the eccentric flange rotates from one end of a semicircular annular limiting groove with a central angle of 180 degrees to the other end, the eccentric flange fixed with the eccentric flange is limited and stops rotating because a cylindrical pin is blocked by the limiting groove, at the moment, the outer rotor continues to synchronously rotate along with the inner rotor, and the eccentric distance rotates 180 degrees, so that the eccentric distance of an inner rotor shaft and an outer rotor shaft also rotates reversely, thereby ensuring that the eccentric distance of the inner rotor shaft and the outer rotor shaft continuously rotates reversely (rotates once every 180 degrees) no matter the inner rotor is connected with a driving shaft or rotates reversely, and further ensuring that oil suction and oil discharge ports are unchanged.

2) The utility model provides a direction-adjustable gearbox lubricating oil pump which is simple in structure, and can reduce complex structural changes caused by oil suction and oil discharge port changes due to pump steering problems by adopting an eccentric flange.

3) The utility model provides a direction-adjustable gearbox lubricating oil pump, which ensures that the elasticity is stable enough through determining the matching tolerance and the structural design of an elastic sheet, realizes reliable reversing, reduces the damage or the accelerated abrasion of the gearbox caused by untimely reversing, and prolongs the service life of the gearbox.

Drawings

Fig. 1 is a schematic structural view of a direction-adjustable gearbox lubricating oil pump according to the present utility model from a front side perspective.

Fig. 2 is a schematic structural view of a direction-adjustable gearbox lubricating oil pump according to the utility model from a rear side view.

Fig. 3 is a front view of a structure of a direction-adjustable gearbox lubricating oil pump provided by the utility model.

Fig. 4 is a rear view of a structure of a direction-adjustable gearbox lubricating oil pump provided by the utility model.

Fig. 5 is an exploded view of a direction-adjustable lubrication pump for a gearbox.

Fig. 6 is a side sectional view of a direction-adjustable gearbox lubricating oil pump provided by the utility model.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be configured and operated in the specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "provided," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

First embodiment

As shown in fig. 1-6, the direction-adjustable gearbox lubricating oil pump provided by the first embodiment of the utility model comprises a pump cover 1 and a pump body 2 which are fixed with each other, as shown in fig. 5, the pump cover 1 in the embodiment is provided with a pump cover hole 11, the pump body 2 is provided with a pump body hole 21, the mounting piece 7 sequentially passes through the pump cover hole 11 and the pump body hole 21 to realize the fixed connection between the pump cover 1 and the pump body 2, the mounting piece 7 in the embodiment at least comprises a positioning piece 71 and a fixing piece 72, the positioning piece 71 is used for realizing the positioning between the pump cover 1 and the pump body 2, the fixing piece 72 is used for realizing the fixed installation between the pump cover 1 and the pump body 2, the positioning piece 71 can be selected from positioning pieces such as positioning pins which are common in the mechanical field, and the mounting fixing piece 72 can be selected from mounting fixing pieces such as bolts or screws which are common in the mechanical field.

As shown in fig. 5, in the present embodiment, an inner rotor 3 and an outer rotor 4 are accommodated in a pump cover 1 and a pump body 2, an outer tooth is provided on an outer wall of the inner rotor 3, an inner tooth is provided on an inner wall of the outer rotor 4, the inner rotor 3 is engaged with the inner tooth of the outer rotor 4 through the outer tooth, and the number of teeth is 1 less than the number of teeth of the inner tooth, so that when a driving shaft rotates to drive the inner rotor 3 to rotate, the inner rotor 3 can drive the outer rotor 4 to rotate synchronously through the outer tooth and the inner tooth which are engaged with each other, and the inner rotor 3 is positioned in the inner rotor 4 and the rotation movement tracks of the two are different, so that the outer rotor 4 eccentrically rotates on an outer circumference of the inner rotor 3, and meanwhile, the inner rotor 3 can rotate in the inner rotor 4 and the outer rotor 4 at different speeds because the number of teeth is 1 less than the number of teeth of the inner tooth; specifically, in the present embodiment, the rotation speed of the inner rotor 3 is greater than the rotation speed of the outer rotor 4.

The inner rotor 3 and the outer rotor 4 rotate along the axial direction of the respective rotating shafts, the number of teeth of the inner rotor is Z1, the number of teeth of the outer rotor is Z2, the number of teeth of the outer rotor is 1 more than that of the inner rotor, the inner rotor rotates to drive the outer rotor to rotate, meanwhile, the inner rotor and the outer rotor have relative sliding speeds, the inner rotor rotates for one circle, and the outer rotor rotates for Z1/Z2 circles, so that the relative speed of the inner rotor and the outer rotor is 1-Z1/Z2=1/Z2, namely the relative speed of the inner rotor and the outer rotor is 1/Z2, and due to the eccentricity and the relative speed, the inter-tooth sealing volume of the inner rotor and the outer rotor is periodically changed in the rotating process, and the corresponding oil absorption and oil discharge process is realized.

The improvement points of the embodiment compared with the prior art are that: an eccentric flange 5 capable of synchronously rotating along with the outer rotor 4 is arranged between the outer rotor 4 and the inner wall of the pump body 2, and the eccentric distance of the eccentric flange 5 is equal to the eccentric distances of the inner rotor 3 and the outer rotor 4 and is equal to e.

In this embodiment, the inner wall of the eccentric flange 5 is in clearance fit with the outer wall of the outer rotor 4, so as to ensure smooth movement between the outer rotor 4 and the eccentric flange 5. The inner wall of the eccentric flange 5 is provided with the spring plate groove 51, the spring plate 8 is arranged in the spring plate groove 51, a certain friction force can be provided through the spring plate 8, when no limit action exists, the friction force provided by the spring plate 8 can drive the eccentric flange 5 to synchronously rotate along with the outer rotor 4, and when the limit action exists, the outer rotor 4 can overcome the friction force provided by the spring plate 8 to synchronously rotate along with the inner rotor 3, and at the moment, the eccentric flange 5 does not synchronously rotate along with the outer rotor 4.

In the embodiment, a limiting pin 6 is arranged on the eccentric flange 5, and the limiting pin 6 is in limiting fit with the pump body 2 to limit the movement stroke of the eccentric flange 5; the method comprises the following steps: a limiting groove 22 is formed in the pump body 2, one end of the limiting pin 6 is fixedly connected with the eccentric flange 5, and the other end of the limiting pin is positioned in the limiting groove 22; the limiting groove 22 in this embodiment is provided in a semicircular arc shape with a central angle of 180 °. When the eccentric flange rotates from one end of the semicircular annular limiting groove with the central angle of 180 degrees to the other end, the cylindrical pin is blocked by the limiting groove, so that the eccentric flange fixed with the eccentric flange is limited and stops rotating, at the moment, the outer rotor continues to synchronously rotate along with the inner rotor, and the eccentric distance is reversed because the eccentric flange rotates 180 degrees, so that the eccentric distance of the inner rotor shaft and the outer rotor shaft is reversed, and the eccentric distance of the inner rotor shaft and the outer rotor shaft can be guaranteed to be continuously reversed (once every 180 degrees of reversing) no matter the inner rotor connected with the driving shaft is in the forward rotation or the reverse rotation process, so that the oil suction port and the oil discharge port are guaranteed to be unchanged.

The technical scheme provided by the embodiment is not only suitable for application of a gearbox end, but also can be applied to oil supplementing or lubrication occasions with low pressure and changed pump steering.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model 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. The utility model provides a direction adjustable gearbox lubricating oil pump, includes mutually fixed pump cover (1) and pump body (2), is held in pump cover (1) and the inside of pump body (2) has inner rotor (3) and external rotor (4), inner rotor (3) can be in the inside of external rotor (4) with external rotor (4) different coaxial and different speed rotation; the method is characterized in that: an eccentric flange (5) capable of rotating synchronously along with the outer rotor (4) is arranged between the outer rotor (4) and the inner wall of the pump body (2), a limiting pin (6) is arranged on the eccentric flange (5), and the limiting pin (6) is in limiting fit with the pump body (2) to limit the movement stroke of the eccentric flange (5).

2. A direction-adjustable gearbox lubrication pump according to claim 1, wherein: the pump cover (1) is provided with a pump cover hole (11), the pump body (2) is provided with a pump body hole (21), and the mounting piece (7) sequentially penetrates through the pump cover hole (11) and the pump body hole (21) to realize the fixed connection between the pump cover (1) and the pump body (2).

3. A direction-adjustable gearbox lubrication pump according to claim 2, wherein: the mounting part (7) at least comprises a positioning part (71) and a fixing part (72).

4. A direction-adjustable gearbox lubrication pump according to claim 1, wherein: the outer wall of the inner rotor (3) is provided with external teeth, the inner wall of the outer rotor (4) is provided with internal teeth, the inner rotor (3) is connected with the internal teeth of the outer rotor (4) through the external teeth in a meshed mode, and the number of external teeth is 1 less than the number of internal teeth.

5. A direction-adjustable gearbox lubrication pump according to claim 1, wherein: the rotational speed of the inner rotor (3) is greater than the rotational speed of the outer rotor (4).

6. A direction-adjustable gearbox lubrication pump according to claim 1, wherein: the eccentricity of the eccentric flange (5) is equal to the eccentricity of the inner rotor (3) and the eccentricity of the outer rotor (4).

7. A direction-adjustable gearbox lubrication pump according to claim 1, wherein: the inner wall of the eccentric flange (5) is in clearance fit with the outer wall of the outer rotor (4).

8. A direction-adjustable gearbox lubrication pump according to claim 1, wherein: the inner wall of the eccentric flange (5) is provided with an elastic piece groove (51), and an elastic piece (8) is arranged in the elastic piece groove (51).

9. A direction-adjustable gearbox lubrication pump according to claim 1, wherein: a limiting groove (22) is formed in the pump body (2), one end of the limiting pin (6) is fixedly connected with the eccentric flange (5), and the other end of the limiting pin is located in the limiting groove (22).

10. A direction-adjustable gearbox lubrication pump according to claim 9, wherein: the limiting groove (22) is arranged in a semicircular shape with a central angle of 180 degrees.