CN211116570U

CN211116570U - Linear conjugate inner gearing bidirectional gear pump

Info

Publication number: CN211116570U
Application number: CN201920885987.8U
Authority: CN
Inventors: 王锦选
Original assignee: Xianju County Bochuang Hydraulic Machinery Factory
Current assignee: Xianju Bochuang Hydraulic Machinery Co.,Ltd.
Priority date: 2019-06-13
Filing date: 2019-06-13
Publication date: 2020-07-28
Anticipated expiration: 2029-06-13

Abstract

The utility model discloses a linear conjugate inner gearing bidirectional gear pump, which comprises a front pump body, a rear pump body and a front end cover, wherein a gear and an inner gear ring are arranged in the rear pump body, and a transmission shaft passes through the front end cover and the front pump body and is connected to the gear in a transmission way; the rear pump body is internally provided with an accommodating cavity, the gear and the inner gear ring are arranged in the accommodating cavity, the gear and the inner gear ring are meshed at one side, a convex strip is arranged in the accommodating cavity at the interval between the gear and the inner gear ring, and two opposite side walls of the front pump body are respectively provided with an oil port; an oil discharge flow passage is axially arranged in the transmission shaft, the front port of the oil discharge flow passage is communicated with the cavity of the front pump body, and the rear port is arranged on the rear end surface of the transmission shaft; the outer end face of the rear pump body is detachably provided with a rear end cover, an oil discharge port is formed in the position, corresponding to the rear port, of the rear end cover, and the rear port is communicated with the oil discharge port. The utility model discloses well two-way gear pump structure is simplified rationally to can retrieve the oil of revealing to the intracavity by the preceding pump body to hydraulic tank in and reuse through oil extraction runner and oil drain port guide.

Description

Linear conjugate inner gearing bidirectional gear pump

Technical Field

The utility model relates to a gear pump specifically is a two-way pump gear of straight line conjugate inner gearing.

Background

In conventional industrial installations, hydraulic systems play a crucial role. A complete hydraulic system mainly comprises five parts, namely a power element (oil pump), a control element (valve), an execution element (oil cylinder), an auxiliary element and hydraulic oil. The oil pump of one of the power elements is divided into an involute gear pump, a vane pump, a plunger pump, a cycloid pump and a screw pump according to the structural form, and the pumps all have the working modes that one end of each pump is fed with oil and the other end of each pump is discharged with oil. Most of the existing bidirectional gear pumps (for example, a hydraulic pump needs to be equipped with a gear pump bidirectional valve mechanism disclosed in patent document CN205260305U to realize bidirectional output) in the existing market have the problems of complex structure, more component parts and high production cost.

SUMMERY OF THE UTILITY MODEL

Not enough to the above-mentioned technique, the utility model provides a structure simplifies reasonable straight line conjugate crescent bidirectional gear pump relatively.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:

a linear conjugate inner gearing bidirectional gear pump comprises a front pump body and a rear pump body which are connected with each other and a front end cover which is hermetically arranged on the end surface of the front pump body, wherein a gear and an inner gear ring which are meshed with each other are arranged in the rear pump body, and a transmission shaft penetrates through the front end cover and the front pump body and is connected to the gear in a transmission manner; the rear pump body is internally provided with a containing cavity, the gear and the inner gear ring are arranged in the containing cavity, the gear and the inner gear ring are meshed on one side, raised bars in a crescent shape are arranged at intervals between the gear and the inner gear ring in the containing cavity, oil ports are formed in two opposite side walls of the front pump body, and the two oil ports are symmetrically arranged above two ends of the raised bars and communicated with the containing cavity.

In the technical scheme, an oil discharge flow passage is axially formed in the transmission shaft, the front port of the oil discharge flow passage is communicated with the cavity of the front pump body, and the rear port of the oil discharge flow passage is formed in the rear end face of the transmission shaft; the outer end face of the rear pump body is detachably provided with a rear end cover, an oil discharge port is formed in the position, corresponding to the rear port, of the rear end cover, and the rear port is communicated with the oil discharge port.

In the technical scheme, the oil drain port is formed in a round hole shape on the surface of the transmission shaft.

In the technical scheme, the oil discharge flow channel is formed into a round hole shape in the transmission shaft.

In the technical scheme, the rear end cover is provided with a through hole, correspondingly, a screw hole is formed in the end face of the rear pump body, and a bolt penetrates through the through hole and is connected into the screw hole.

In the technical scheme, a sealing ring is arranged between the rear end cover and the rear pump body in a padded mode.

In the technical scheme, the end face of the rear end cover is provided with a placement groove, and the sealing ring is arranged in the placement groove.

Compared with the prior art, the beneficial effects of the utility model are that: in the bidirectional gear pump of the utility model, two oil ports are symmetrically arranged above two ends of the raised bar, the adoption of the symmetrical structural design can realize bidirectional transmission, for the convenience of description, the two oil ports are respectively called as a first oil port and a second oil port, when the bidirectional gear pump in the utility model is used, the motor shaft of the motor is coaxially fixed with the front end of the transmission shaft, when the motor rotates in the positive direction, the motor drives the transmission shaft to rotate, further drives the gear through the transmission shaft, drives the inner gear ring to rotate through the gear, under the meshing separation acting force of the gear and the inner gear ring, hydraulic oil flows from the first oil port to the second oil port to realize the forward work of the executive component, and similarly, when the motor rotates reversely, the switching of the high-pressure cavity and the low-pressure cavity is realized, thereby drive hydraulic oil and flow to first hydraulic fluid port direction by the second hydraulic fluid port to realize the reverse work of execute component. Through the two-way drive switching with the motor just reversing realization execute component, compare current two-way gear pump structure, the utility model provides a two-way gear pump structure is more simplified, has reduced control element's use, has reduced manufacturing cost.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic sectional view taken along line A-A in FIG. 1.

Fig. 3 is a partially enlarged view of fig. 2.

FIG. 4 is a schematic sectional view taken along line B-B in FIG. 1.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Referring to fig. 1 to 4, a linear conjugate internal-meshing bidirectional gear pump includes a front pump body 1 and a rear pump body 2 connected to each other, and a front end cap 7 hermetically disposed on an end surface of the front pump body 1, a gear 4 and an internal gear ring 5 engaged with each other are disposed in the rear pump body 2, and a transmission shaft 3 penetrates through the front end cap 7 and the front pump body 1 and is drivingly connected to the gear 4; the rear pump body is internally provided with a containing cavity, the gear 4 and the inner gear ring 5 are arranged in the containing cavity, the gear 4 and the inner gear ring 5 are meshed on one side, a crescent-shaped raised strip 6 is arranged at the interval between the gear 4 and the inner gear ring 5 in the containing cavity, oil ports are formed in two opposite side walls of the front pump body 1, and the oil ports are symmetrically arranged above two ends of the raised strip 6 and communicated with the containing cavity. In this embodiment, the two oil ports are symmetrically arranged above the two ends of the raised strip 6, and the symmetrical structural design is adopted to avoid the problem of inconsistent reversing caused by asymmetry, for convenience of description, the two oil ports are respectively called as a first oil port 10 and a second oil port 11, when the bidirectional gear pump in the embodiment is used, a motor shaft of the motor is coaxially fixed with the front end of the transmission shaft, when the motor rotates in the positive direction, the motor drives the transmission shaft 3 to rotate, further drives the gear 4 through the transmission shaft, drives the inner gear ring 5 to rotate through the gear 4, under the meshing separation acting force of the gear 4 and the inner gear ring 5, hydraulic oil flows from the first oil port 10 to the second oil port 11 to realize the forward work of the actuating element, and similarly, when the motor rotates reversely, the switching of the high-pressure cavity and the low-pressure cavity is realized, thereby driving the hydraulic oil to flow from the second oil port 11 to the first oil port 10, and realizing the reverse work of the actuating element. The bidirectional driving switching of the actuating element is realized by forward and reverse rotation of the motor, and compared with a traditional hydraulic system, the bidirectional driving switching hydraulic system has the advantages that the use of control elements is reduced, and the cost can be reduced.

In the embodiment, the tooth surface of the gear 4 is a straight line, and the tooth surface of the inner gear ring 5 is a straight conjugate line, so that the special tooth-shaped matching operation can achieve the effects of stable pulsation and extremely low noise, has no pause and frustration, and has no difference with a one-way pump when being used.

As a further improvement, in this embodiment, an oil discharge flow passage 30 is axially formed in the transmission shaft 3, a front port 30a of the oil discharge flow passage 30 communicates with the cavity of the front pump body 1, and a rear port is formed in a rear end surface of the transmission shaft 3; the dismantled and assembled rear end cap 8 that is equipped with of outer terminal surface of the back pump body 2 and the oil drain 80 has been seted up with the rear end port corresponding position on the rear end cap 8, the rear end port with the oil drain 80 is linked together, and in the above-mentioned structure, set up the oil extraction runner on the transmission shaft, can be with by the preceding pump body reveal to the intracavity oil through oil extraction runner and oil drain guide retrieve to hydraulic tank in and reuse, structural design is more reasonable.

In this embodiment, the front pump body 1 and the rear pump body 2 are connected by bolts, the front end cover 6 and the front pump body 1 are connected by bolts, and sealing members are arranged between the front pump body 1 and the front pump cover 7 and between the front pump cover 7 and the transmission shaft 3.

In the present embodiment, both the oil discharge port 80 and the oil discharge pipe 30 are configured to be circular holes, and the circular holes of the oil discharge port 80 and the oil discharge pipe 30 are convenient for machining, such as drilling. However, the present invention is not limited to the circular hole-shaped oil discharge port 30a and the oil discharge flow passage 30.

In the present embodiment, the surface of the rear end cap 7 has more than two through holes 71, correspondingly, the same position of the end surface of the rear pump body 2 is provided with a screw hole 20, and the bolt 9 passes through the through hole 71 and is screwed into the screw hole 20, thereby completing the connection. In order to ensure sealing, a placing groove 72 is further formed in the end face of the rear end cover 7, a sealing ring 8 is arranged in the placing groove 72, and the sealing ring 8 can be better attached to a gap; and the seal ring 8 is configured as an O-ring 8.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and all modifications, equivalents, improvements and the like that are made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a two-way gear pump of straight line conjugate inner gearing, is in including the preceding pump body that is connected and the back pump body and sealed the front end housing of preceding pump body terminal surface be equipped with gear and ring gear that the transmission is connected in the back pump body, the transmission shaft passes front end housing and preceding pump body and transmission are connected to gear, its characterized in that: the rear pump body is internally provided with a containing cavity, the gear and the inner gear ring are arranged in the containing cavity, the gear and the inner gear ring are meshed on one side, raised bars in a crescent shape are arranged at intervals between the gear and the inner gear ring in the containing cavity, oil ports are formed in two opposite side walls of the front pump body, and the two oil ports are symmetrically arranged above two ends of the raised bars and communicated with the containing cavity.

2. The linear conjugated internal gear pump of claim 1, wherein: an oil discharge flow passage is axially formed in the transmission shaft, the front port of the oil discharge flow passage is communicated with the cavity of the front pump body, and the rear port of the oil discharge flow passage is formed in the rear end face of the transmission shaft; the outer end face of the rear pump body is detachably provided with a rear end cover, an oil discharge port is formed in the position, corresponding to the rear port, of the rear end cover, and the rear port is communicated with the oil discharge port.

3. The linear conjugated crescent gear pump of claim 2, wherein: the oil discharge port is formed in a round hole shape on the surface of the transmission shaft.

4. The linear conjugated crescent gear pump of claim 2, wherein: the oil discharge flow channel is formed in the transmission shaft into a round hole shape.

5. The linear conjugated crescent gear pump of claim 2, wherein: the rear end cover is provided with a through hole, correspondingly, the end face of the rear pump body is provided with a screw hole, and a bolt penetrates through the through hole and is connected into the screw hole.

6. The linear conjugated internal gear pump of claim 5, wherein: and a sealing ring is arranged between the rear end cover and the rear pump body in a cushioning manner.

7. The linear conjugated internal gear pump of claim 6, wherein: the end face of the rear end cover is provided with a placement groove, and the sealing ring is arranged in the placement groove.