CN213235433U - Oil replenishing pump and hydraulic power unit - Google Patents

Abstract

The utility model provides an oil compensating pump and hydraulic power unit, this oil compensating pump includes: the shell comprises a pump body and a first end cover arranged on the pump body, the pump body is provided with an oil compensation cavity, the first end cover is provided with an oil absorption window arranged corresponding to the oil compensation cavity, the shell is provided with a connecting structure, the shell is connected with a connected piece through the connecting structure, and the connecting structure and the first end cover are positioned at the same end of the shell; the transmission assembly is rotatably arranged in the oil supplementing cavity. Through the technical scheme provided by the application, the problem of complex structure in the prior art can be solved.

Description

Oil replenishing pump and hydraulic power unit

Technical Field

The utility model relates to a hydraulic transmission technical field particularly, relates to an oil supplementing pump and hydraulic power unit.

Background

At present, an oil inlet is formed in a pump body of an oil supplementing pump, the oil supplementing pump connects the oil inlet with an oil tank through an external oil suction pipeline, and the oil supplementing pump absorbs oil from the oil tank through the oil suction pipeline.

However, in the prior art, the oil supplementing pump needs to utilize an external oil suction pipeline to suck oil, so that the problem of complex structure exists.

SUMMERY OF THE UTILITY MODEL

The utility model provides an oil supplementing pump and hydraulic power unit to solve the problem that the structure is complicated among the prior art.

According to an aspect of the utility model provides an oil compensating pump, oil compensating pump includes: the shell comprises a pump body and a first end cover arranged on the pump body, the pump body is provided with an oil compensation cavity, the first end cover is provided with an oil absorption window arranged corresponding to the oil compensation cavity, the shell is provided with a connecting structure, the shell is connected with a connected piece through the connecting structure, and the connecting structure and the first end cover are positioned at the same end of the shell; the transmission assembly is rotatably arranged in the oil supplementing cavity.

Furthermore, the transmission assembly comprises a driving gear and a driven gear, external teeth are arranged on the driving gear, internal teeth are arranged on the driven gear, the driving gear penetrates through the driven gear and is meshed with the driven gear, the driving gear is matched with the driven gear to enable the oil supplementing cavity to be divided into an oil suction area and an oil pressing area, and the oil suction window is arranged corresponding to the oil suction area.

Further, the size of the oil suction window is gradually increased along the rotation direction of the driving gear.

Furthermore, an oil suction groove and an oil pressing groove are arranged on the bottom wall of the oil supplementing cavity at intervals, the oil suction groove is arranged corresponding to the oil suction area, the oil pressing groove is arranged corresponding to the oil pressing area, and a crescent plate is arranged between the oil suction groove and the oil pressing groove.

Further, the crescent moon board corresponds the interval setting of driving gear and driven gear, and the crescent moon board extends along driven gear's direction of rotation, has the clearance between crescent moon board and external tooth and the internal tooth.

Further, the shape and size of the oil suction window are matched with the shape and size of the oil suction groove.

Further, the oil supplementing pump further comprises an annular sealing element, an annular sealing groove is formed in the pump body and/or the first end cover, the annular sealing groove is located on the periphery of the oil absorption window, and the annular sealing element is arranged in the annular sealing groove.

Further, the transmission assembly further comprises: the first end cover is provided with a mounting hole, the spline shaft penetrates through the mounting hole and extends into the pump body, the driving gear is sleeved on the spline shaft, and the oil absorption window is positioned at the periphery of the mounting hole; and the bearing assembly is sleeved on the spline shaft and comprises a first bearing and a second bearing, the first bearing is positioned between the spline shaft and the inner wall of the mounting hole, and the second bearing is positioned between the spline shaft and the pump body.

Further, the casing still includes the second end cover, and first end cover is located the one end of the pump body, and the second end cover is located the other end of the pump body, all is provided with the sealing member between first end cover and the pump body and between second end cover and the pump body.

According to the utility model discloses an on the other hand provides a hydraulic power unit, and hydraulic power unit includes: a plunger pump having a flow port; the oil replenishing pump is provided with a connecting structure, the oil replenishing pump is connected with the plunger pump through the connecting structure, an oil absorption window of the oil replenishing pump is communicated with the circulation port, and the oil replenishing pump is the oil replenishing pump provided by the method.

Use the technical scheme of the utility model, this oil supplementing pump include casing and drive assembly, and the casing includes the pump body and sets up the first end cover on the pump body, and drive assembly rotationally sets up in the oil supplementing intracavity of the pump body. Through set up the oil absorption window on first end cover, when utilizing the connection structure on the casing to mend the oil pump with be connected by the connecting piece, because connection structure and first end cover are located the same of casing and serve, the oil absorption window can directly with by the connecting piece intercommunication, utilize the oil absorption window can be by the oil absorption in the connecting piece, need not additionally to set up the oil absorption pipeline, can simplify the structure of device.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a cross-sectional view of an oil replenishing pump provided by an embodiment of the present invention;

fig. 2 shows a schematic structural diagram of an oil replenishing pump provided by an embodiment of the present invention;

FIG. 3 shows an assembly view of the pump body and transmission assembly of FIG. 1;

fig. 4 shows a schematic view of the pump body of fig. 1.

Wherein the figures include the following reference numerals:

10. a housing; 11. a pump body; 111. an oil supply cavity; 1111. an oil absorption area; 1112. pressing an oil area; 112. an oil suction groove; 113. pressing an oil tank; 114. a crescent plate; 115. an annular seal groove; 12. a first end cap; 121. an oil absorption window; 13. a second end cap; 14. connecting lugs; 141. a first connection hole;

20. a transmission assembly; 21. a driving gear; 211. an outer tooth; 22. a driven gear; 221. internal teeth; 23. a spline shaft; 24. a bearing assembly; 241. a first bearing; 242. a second bearing;

30. a seal member; 40. a retainer ring; 50. a semicircular key.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1 to 4, an embodiment of the present invention provides an oil supply pump, which includes a housing 10 and a transmission assembly 20. The housing 10 includes a pump body 11 and a first end cap 12 disposed on the pump body 11, the pump body 11 has an oil supply cavity 111, the transmission assembly 20 is rotatably disposed in the oil supply cavity 111, and the transmission assembly 20 is used to drive oil to flow in the oil supply cavity 111. Specifically, the first end cover 12 has an oil suction window 121 disposed corresponding to the oil compensation chamber 111, and the housing 10 has a connecting structure, through which the housing 10 is connected to the connected member, the connecting structure and the first end cover 12 being located on the same end of the housing 10. Wherein the connecting structure includes, but is not limited to, a threaded structure, a fastener, and a weld.

By using the oil replenishing pump provided by the embodiment, when the oil replenishing pump is connected with a connected piece by using the connecting structure, because the connecting structure and the first end cover 12 are located at the same end of the shell 10, the oil absorption window 121 can be directly communicated with the connected piece, and the oil absorption window 121 can be used for directly absorbing oil in the connected piece, so that an oil absorption pipeline does not need to be additionally arranged, the structure of the device can be simplified, and the integration level of the device is improved.

And, through set up the oil absorption window on first end cover, the size of oil absorption window can not receive the thickness influence of the pump body to can guarantee that the oil absorption window has enough big oil absorption area. In the prior art, the size of the oil inlet is limited by the thickness of the pump body of the oil supplementing pump due to the small volume of the oil supplementing pump, and in order to prevent the oil supplementing pump from being vacuumed under a high-speed working condition, a screw joint can be arranged at the oil inlet so as to increase the cross-sectional area of an oil suction pipeline. In this embodiment, through setting up the oil absorption window on first end cover, need not to set up the butt joint, can further simplify the structure of device when guaranteeing the oil absorption.

As shown in fig. 1 and 3, the transmission assembly 20 includes a driving gear 21 and a driven gear 22, the driving gear 21 and the driven gear 22 are engaged with each other, and both the driving gear 21 and the driven gear 22 are rotatably disposed in the oil replenishing cavity 111. Specifically, the driving gear 21 is provided with external teeth 211 on an outer wall thereof, the driven gear 22 has a through hole provided with internal teeth 221 thereon, and the driving gear 21 is inserted into the through hole of the driven gear 22 and engaged with the driven gear 22. In this embodiment, the driving gear 21 and the driven gear 22 cooperate to divide the oil supplementing chamber 111 into an oil sucking region 1111 and an oil pressing region 1112, and the oil sucking window 121 is disposed corresponding to the oil sucking region 1111, so that the oil sucking window 121 can be used to suck oil from the connected object when the driving gear 21 and the driven gear 22 cooperate.

In order to further enhance the oil suction effect, the size of the oil suction window 121 is gradually increased along the rotation direction of the driving gear 21. In this embodiment, an oil suction window is opened in an area where the effective volume of the corresponding driving gear and the corresponding driven gear of the first end cover gradually increases according to the state of engagement.

As shown in fig. 4, an oil suction groove 112 and an oil pressing groove 113 are provided at intervals on the bottom wall of the oil compensation chamber 111, the oil suction groove 112 is provided corresponding to the oil suction area 1111, and the oil pressing groove 113 is provided corresponding to the oil pressing area 1112. During the rotation of the driving gear 21 and the driven gear 22, oil can be sucked into the oil suction groove 112 through the oil suction window 121, and then oil can be pressed by the oil pressing groove 113. In this embodiment, the crescent plate 114 is disposed between the oil suction groove 112 and the oil pressing groove 113, so that the oil suction groove 112 and the oil pressing groove 113 can be separated by the crescent plate 114, and the driving gear 21 and the driven gear 22 can be axially limited by the crescent plate 114, thereby preventing the driving gear 21 and the driven gear 22 from axially shaking.

As shown in fig. 4, in the present embodiment, the oil pressing groove 113 is located on the left side of the oil compensation cavity bottom wall, the oil suction groove 112 is located on the right side of the oil compensation cavity bottom wall, and the crescent 114 is located on the top of the oil compensation cavity bottom wall and located between the oil suction groove 112 and the oil pressing groove 113. Specifically, the oil pressing groove 113, the crescent 114, and the oil suction groove 112 are arranged annularly along the circumferential direction of the oil compensation chamber.

As shown in fig. 3 and 4, the crescent 114 is disposed corresponding to the interval between the driving gear 21 and the driven gear 22, and the crescent 114 extends along the rotation direction of the driven gear 22, so that the driving gear 21 and the driven gear 22 are limited by the crescent 114. The crescent plate 114 is provided corresponding to the end of the external teeth of the drive gear 21 and the end of the internal teeth of the driven gear 22. Further, the crescent plate 114 has a gap with the external teeth 211 and the internal teeth 221, and the crescent plate 114 does not interfere with the driving gear 21 and the driven gear 22 during the rotation of the driving gear 21 and the driven gear 22.

In the present embodiment, the shape and size of the oil suction window 121 are matched with the shape and size of the oil suction groove 112, so that the oil suction efficiency can be further improved. Specifically, the oil suction window 121 and the oil suction groove 112 are both crescent structures. The cross-sectional area of the oil suction window 121 is greater than or equal to the cross-sectional area of the oil suction groove 112.

In order to improve the sealing performance of the device, the oil replenishing pump further comprises an annular sealing element, an annular sealing groove 115 is formed in the pump body 11 and/or the first end cover 12, the annular sealing groove 115 is located on the periphery of the oil suction window 121, and the annular sealing element is arranged in the annular sealing groove 115. In this embodiment, an annular seal groove 115 is provided in an end surface of the pump body 11, and a seal ring is provided in the annular seal groove. When the oil supplementing pump is connected with the connected piece, the sealing performance can be improved by utilizing the annular sealing groove and the annular sealing piece. In other embodiments, an annular seal groove may be provided on the first end cap, or both the pump body and the first end cap.

As shown in fig. 1, the transmission assembly 20 further includes a spline shaft 23 and a bearing assembly 24, wherein the bearing assembly 24 is sleeved on the spline shaft 23. Wherein, be provided with the mounting hole on the first end cover 12, the integral key shaft 23 is worn to establish in the mounting hole and is stretched into in the pump body 11, and driving gear 21 cover is established on integral key shaft 23, utilizes integral key shaft 23 can be for driving gear 21 transmission drive power, and oil absorption window 121 is located the periphery of mounting hole. Specifically, bearing assembly 24 includes a first bearing 241 and a second bearing 242, first bearing 241 being located between spline shaft 23 and the inner wall of the mounting hole to reduce the friction between spline shaft 23 and first end cap 12, and second bearing 242 being located between spline shaft 23 and pump body 11 to reduce the friction between spline shaft 23 and pump body 11.

As shown in fig. 1, the housing 10 further includes a second end cap 13, the first end cap 12 is located at one end of the pump body 11, the second end cap 13 is located at the other end of the pump body 11, and sealing members 30 are disposed between the first end cap 12 and the pump body 11 and between the second end cap 13 and the pump body 11, so as to ensure the sealing performance of the device.

As shown in fig. 4, a coupling lug 14 is provided on an outer wall of the housing, and a first coupling hole 141 is provided on the coupling lug. Through set up the second connecting hole on being connected the piece, wear to establish the fastener in first connecting hole and second connecting hole, can utilize the fastener can be connected with the oil replenishing pump by the connecting piece. Specifically, the engaging lug is provided on the outer wall of the pump body, and the engaging lug and the first end cover 12 are located on the same end of the housing 10.

As shown in fig. 1, in the present embodiment, the oil replenishment pump further includes a retainer ring 40 and a half key 50.

The phenomenon of insufficient oil absorption is called suction emptying because the resistance of an oil inlet of the oil supplementing pump is too large, the rotating speed of the oil supplementing pump is too high, the viscosity of oil is too large and the like. The wire aligning joint is a joint capable of changing the inner diameters of two ends of the connecting port.

In this embodiment, the ratio of the cross-sectional area of the oil suction window 121 to the cross-sectional area of the inner diameter of the oil suction pipeline in the prior art is greater than or equal to 3, so that the oil replenishing pump can be ensured to have sufficient oil inlet amount, the phenomenon of air suction cannot occur in the oil replenishing pump, and the requirement of the engineering machinery under the high-speed working condition can be met. Specifically, the ratio of the cross-sectional area of the oil suction window 121 to the cross-sectional area of the inner diameter of the oil suction line in the related art is 3.6.

As shown in fig. 3, in order to facilitate understanding of the oil supply pump provided in the present embodiment, the following explanation is made in conjunction with the operation process of the oil supply pump: when the driving gear 21 rotates in the direction indicated by the arrow, the driving gear 21 drives the driven gear 22 to rotate in the same direction in the pump body 11, and the driving and driven gears are matched with the crescent plate 114, so that the liquid is conveyed and pressurized by the change of the working volume formed between the oil supply cavity and the meshed driving and driven gears. With the continuous rotation of the driving and driven gears, the oil supplementing pump repeats the oil absorbing and discharging processes.

In other embodiments, the driving gear 21 can rotate in the opposite direction as shown by the arrow, and the left side is the oil suction area and the right side is the oil pressing area, accordingly, in this case, the oil suction window is opened on the left side. Regardless of the rotation of the driving gear 21, the oil absorption window can be opened corresponding to the oil absorption area, so that the oil absorption window can be used for absorbing oil.

The utility model discloses still another embodiment provides a hydraulic power unit, and this hydraulic power unit includes plunger pump and oil compensating pump, and the plunger pump has the circulation mouth, and oil absorption window 121 of oil compensating pump is linked together with the circulation mouth, and the oil compensating pump that the oil compensating pump provided for the aforesaid. The oil supplementing pump is connected with the plunger pump through the connecting structure, and the oil supplementing pump absorbs oil through the oil absorption window and the common oil inlet of the plunger pump and supplies oil to the main oil way. In this embodiment, the plunger pump is a coupled piece.

Through the device that this embodiment provided, set up the oil absorption window on first end cover, replace traditional external oil absorption pipeline oil absorption's structure, solved the difficult problem of pipeline overall arrangement, pipeline leakage, suction phenomenon, satisfied the requirement of the high-speed operating mode of engineering machine tool, can guarantee that the device satisfies energy-concerving and environment-protective requirement to promote the life of oil supplementing pump.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. An oil replenishment pump, characterized by comprising:

the oil supply device comprises a shell (10), wherein the shell (10) comprises a pump body (11) and a first end cover (12) arranged on the pump body (11), the pump body (11) is provided with an oil supply cavity (111), the first end cover (12) is provided with an oil suction window (121) arranged corresponding to the oil supply cavity (111), the shell (10) is provided with a connecting structure, the shell (10) is connected with a connected piece through the connecting structure, and the connecting structure and the first end cover (12) are positioned at the same end of the shell (10);

and the transmission assembly (20) is rotatably arranged in the oil supplementing cavity (111).

2. The oil supply pump of claim 1, wherein the transmission assembly (20) comprises a driving gear (21) and a driven gear (22), the driving gear (21) is provided with external teeth (211), the driven gear (22) is provided with internal teeth (221), the driving gear (21) is arranged in the driven gear (22) in a penetrating manner and meshed with the driven gear (22), the driving gear (21) is matched with the driven gear (22) to enable the oil supply chamber (111) to be divided into an oil suction area (1111) and an oil pressing area (1112), and the oil suction window (121) is arranged corresponding to the oil suction area (1111).

3. The oil replenishment pump according to claim 2, wherein the size of the oil suction window (121) becomes gradually larger in a rotation direction of the drive gear (21).

4. The oil supply pump of claim 2, characterized in that an oil suction groove (112) and an oil pressing groove (113) are arranged on the bottom wall of the oil supply cavity (111) at intervals, the oil suction groove (112) corresponds to the oil suction area (1111) setting, the oil pressing groove (113) corresponds to the oil pressing area (1112) setting, and a crescent plate (114) is arranged between the oil suction groove (112) and the oil pressing groove (113).

5. The oil replenishment pump according to claim 4, wherein the crescent plate (114) is provided in correspondence with an interval between the drive gear (21) and the driven gear (22), the crescent plate (114) extends in a rotation direction of the driven gear (22), and a gap is provided between the crescent plate (114) and the external teeth (211) and the internal teeth (221).

6. The oil replenishment pump according to claim 4, wherein the oil suction window (121) has a shape and a size that are matched with those of the oil suction groove (112).

7. The oil replenishment pump according to claim 1, characterized in that the oil replenishment pump further comprises an annular seal, an annular seal groove (115) is provided on the pump body (11) and/or the first end cover (12), the annular seal groove (115) is located at an outer periphery of the oil suction window (121), and the annular seal is provided in the annular seal groove (115).

8. The oil replenishment pump of claim 2, wherein the transmission assembly (20) further comprises:

the first end cover (12) is provided with a mounting hole, the spline shaft (23) penetrates through the mounting hole and extends into the pump body (11), the driving gear (21) is sleeved on the spline shaft (23), and the oil absorption window (121) is located on the periphery of the mounting hole;

the bearing assembly (24) is sleeved on the spline shaft (23), the bearing assembly (24) comprises a first bearing (241) and a second bearing (242), the first bearing (241) is located between the spline shaft (23) and the inner wall of the mounting hole, and the second bearing (242) is located between the spline shaft (23) and the pump body (11).

9. The oil replenishment pump according to claim 1, characterized in that the housing (10) further comprises a second end cover (13), the first end cover (12) being located at one end of the pump body (11), the second end cover (13) being located at the other end of the pump body (11), a seal (30) being provided between the first end cover (12) and the pump body (11) and between the second end cover (13) and the pump body (11).

10. A hydraulic power unit, comprising:

a plunger pump having a flow port;

the oil supply pump, the oil supply pump has connection structure, the oil supply pump is connected with the plunger pump through connection structure, the oil absorption window (121) of oil supply pump is linked together with the circulation mouth, the oil supply pump of any one of claims 1 to 9.

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