TW201619503A - Gear pump - Google Patents

Abstract

A gear pump includes a pump set having an accommodation chamber, two first axle holes, and two second axle holes; a first gear wheel set having a gear wheel disposed in the accommodation chamber of the pump set and connected with two gear axles, which are respectively inserted in the first axle holes of the pump set; and a second gear wheel set having a gear wheel disposed in the accommodation chamber of the pump set and connected with two gear axles, which are respectively inserted in the second axle holes of the pump set. A rolling bearing is installed between the first axle holes of the pump set and the gear axles of the first gear wheel set. A rolling bearing is installed between the second axle holes of the pump set and the gear axles of the second gear wheel set. The rolling bearing includes a plurality of rolling elements.

Description

Gear pump

The invention relates to pumps, and in particular to a gear pump.

The conventional gear pump uses a bushing between the shaft hole of the pump set and the pinion of the gear set; since the lateral thrust is large, the inner edge of the bushing and the outer circumference of the gear shaft of the gear set are easily worn, and must be frequently replaced. Not only reduces the time of operation, but also wastes parts.

Therefore, it is known that the loss of the gear pump still needs to be improved.

In view of the above, the main object of the present invention is to provide a gear pump which can improve the rotation benefit between the shaft hole of the pump set and the pinion of the gear set, and is changed from a sliding contact to a rolling contact, thereby reducing friction and reducing parts. Wear, increase the time of use, reduce the frequency of replacement, and reduce the drive current to achieve energy saving and carbon saving benefits.

To achieve the above object, the present invention provides a gear pump including a pump set having a chamber, two first shaft holes, and two second shaft holes; a first gear set having a gear disposed on the pump set a two-toothed shaft is connected to the first shaft hole of the pump set; a second gear set has a gear disposed in the chamber of the pump set and two toothed shafts are connected thereto. a pinion shaft is disposed in the second shaft hole of the pump set; a rolling bearing is disposed between the first shaft hole of the pump set and the pinion shaft of the first gear set, and the second shaft hole of the pump set and the second A rolling bearing is mounted between the pinions of the gear set, the rolling bearing having a plurality of rolling elements.

Rolling contact with the teeth of the first gear set by rolling elements of the rolling bearing The rolling elements of the shaft and the rolling bearing can rollly contact the pinion of the second gear set, that is, the rolling can reduce the friction, thereby reducing the friction and reducing the wear of the parts, increasing the use time, reducing the frequency of replacement, and reducing the driving current, thereby achieving energy saving. The benefits of carbon saving.

The detailed structure and characteristics of the gear pump provided by the present invention will be This will be described in detail in the continued embodiments. However, it should be understood by those of ordinary skill in the art that the particular embodiments of the invention are described herein.

(4) ‧‧‧ front pump cover

(6) ‧‧‧ rear pump cover

(9) ‧‧‧ pump body

(10) ‧‧‧ pump sets

(12) ‧ ‧ ‧ room

(13)‧‧‧First shaft hole

(14)‧‧‧Second shaft hole

(30)‧‧‧First gear set

(31)‧‧‧ Gears

(32)‧‧‧rings

(40)‧‧‧Second gear set

(41)‧‧‧ Gears

(42)‧‧‧rings

(50)‧‧‧ rolling bearings

(51) ‧ ‧ retaining ring

(52) ‧‧‧ rolling elements

(53) ‧ ‧ outer ring

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a cross-sectional view of a combination of a preferred embodiment of the present invention.

Figure 2 is a cross-sectional view of another combination of a preferred embodiment of the present invention.

Figure 3 is an exploded view of a rolling bearing in accordance with a preferred embodiment of the present invention.

The Applicant first describes here that the adjectives relating to directionality, such as inside, outside, up, and down, as referred to throughout the specification, are based on the directions in the drawings of the present invention.

The technical contents and features of the present invention will be described in detail below with reference to the accompanying drawings, in which: FIG. 1 to FIG. 4, a gear pump according to a preferred embodiment of the present invention, The utility model comprises a pump set (10) comprising at least a pump cover and a pump body (9), a chamber (12), two first shaft holes (13) coaxial and same aperture, and two second shaft holes (14) Coaxial and same aperture. In this embodiment, the first shaft hole (13) and the second shaft hole (14) are parallel to each other. The pump cover includes a front pump cover (4) and a rear pump cover (6) that are respectively coupled to both sides of the pump body (9).

a first gear set (30) having a gear (31) disposed in the chamber (12) of the pump set (10) and coupled with two pinion shafts (32), the pinion shaft (32) being disposed therein The first shaft hole (13) of the pump set (10).

a second gear set (40) having a gear (41) disposed in the chamber (12) of the pump unit (10) and coupled with two pinion shafts (42), the pinion shaft (42) being disposed therein The second shaft hole (14) of the pump set (10).

That is, shaft holes (13) (14) for passing the pinion (32) (42) are provided in the front pump cover (4) and the rear pump cover (6).

A rolling bearing (50) is mounted between the first shaft hole (13) of the pump set (10) and the pinion (32) of the first gear set (30), and the second shaft hole of the pump set (10) (14) A rolling bearing (50) is mounted between the pinion (42) of the second gear set (40). The rolling bearing (50) is mounted in the shaft hole (13) (14), and an inner ring of the rolling bearing (50) is sleeved on an outer wall of the pinion (32) (42).

In this embodiment, the rolling bearing (50) is a needle bearing, each having a retaining ring (51) supporting a rolling element (52), and a plurality of rolling elements (52), that is, needles are disposed on the retaining ring (51). And an outer ring (53) having an inner edge receiving the rolling element (52), the outer ring (53) framing the outer edge and the side edge of the rolling element (52); in addition, the outer ring (53) The outer edge is plugged to the inner edge of the first shaft hole (13) of the pump set (10) and the inner edge of the second shaft hole (14).

The operation description and the effect of the embodiment are as follows: the first gear set (30) is driven by the active gear to rotate the second gear set (40), and the oil in the low pressure chamber is compressed and transmitted to the high pressure chamber; The pinion (32) of the first gear set (30) and the pinion (42) of the second gear set (40) are respectively pressed against the first shaft hole (13) of the pump set (10) and One side of the second shaft hole (14).

At this time, with the rolling contact concept of the present invention, the rolling contact of the needle roller transfers the force to each of the needle rollers, which can reduce the friction force, improve the bearing life, and reduce the driving current.

In addition to the foregoing embodiments, the present invention may be arbitrarily matched or substituted for the following aspects: for example, wherein the needle bearing is a drawn outer ring type needle bearing, a needle bearing with a needle retainer element , Turned needle roller bearings or needle roller bearings with separate cages.

Furthermore, the rolling bearings (50) also include needle bearings, and also include roller bearings and ball bearings; the terms of the other bearings are not limited, and the bushings may be equivalent, that is, they may be referred to as needle bushings, roller linings. Set and ball bushing.

Moreover, the rolling bearings (50) on both sides are provided with two sets of juxtaposition, which can further increase the effects of the various effects described above.

Any of the above-described embodiments can be used in combination with one or more of them, and the object of the present invention can be achieved.

In summary, the gear pump of the present invention can rollably contact the pinion of the first gear set by the rolling elements of the rolling bearing, and the rolling elements of the rolling bearing can rollly contact the pinion of the second gear set, that is, the rolling can be reduced to reduce friction. The purpose of the present invention is achieved by improving the effect of the rotation between the shaft hole of the pump set and the pinion of the gear set, reducing the wear of the parts, increasing the time of use, and reducing the frequency of replacement.

(4) ‧‧‧ front pump cover

(6) ‧‧‧ rear pump cover

(9) ‧‧‧ pump body

(10) ‧‧‧ pump sets

(12) ‧ ‧ ‧ room

(13)‧‧‧First shaft hole

(14)‧‧‧Second shaft hole

(30)‧‧‧First gear set

(31)‧‧‧ Gears

(32)‧‧‧rings

(40)‧‧‧Second gear set

(41)‧‧‧ Gears

(42)‧‧‧rings

(50)‧‧‧ rolling bearings

Claims (9)

A gear pump includes: a pump set (10) having a chamber (12), two first shaft holes (13), two second shaft holes (14), and a first gear set (30) having A gear (31) is disposed in the chamber (12) of the pump group (10) and is connected with two pinion shafts (32), and the pinion shaft (32) is disposed in the first shaft hole of the pump group (10) (13); a second gear set (40) having a gear (41) disposed in the chamber (12) of the pump set (10) and coupled with two pinion shafts (42), the pinion (42) a second shaft hole (14) disposed in the pump set (10); a first shaft hole (13) of the pump set (10) and a pinion (32) of the first gear set (30) A rolling bearing (50) is disposed, and a rolling bearing (50) is mounted between the second shaft hole (14) of the pump set (10) and the pinion (42) of the second gear set (40), the rolling bearing (50) There are a plurality of rolling elements (52). A gear pump according to claim 1, wherein each of the rolling bearings (50) has a retaining ring (51) supporting the rolling element (52). A gear pump according to claim 2, wherein each of the rolling bearings (50) has an outer ring (53) for surrounding the rolling element (52). A gear pump according to claim 1, wherein each of the rolling bearings (50) has an outer ring (53) for surrounding the rolling element (52). The gear pump according to any one of claims 1 to 4, wherein the pump set (10) comprises a pump body (9) and a pump cover, the pump cover comprising two pump bodies (9) respectively connected a front pump cover (4) and a rear pump cover (6), the front pump cover (4) and the rear pump cover (6) are provided with shaft holes for the pinion (32) (42) to pass through ( 13) (14), the rolling bearing (50) is mounted in the shaft hole (13) (14), and an inner ring of the rolling bearing (50) is sleeved on an outer wall of the pinion (32) (42). According to the gear pump of claim 5, the rolling bearing (50) is a roller bearing or a needle bearing. The gear pump according to claim 6, wherein the needle bearing is rushed Outer ring needle roller bearings, needle roller bearings with needle roller cage components, turned needle roller bearings or needle roller bearings with separate cage. The gear pump according to any one of claims 1 to 4, wherein the rolling bearing (50) is a roller bearing or a needle bearing. The gear pump according to claim 8, wherein the needle roller bearing is a drawn outer ring type needle bearing, a needle bearing with a needle retainer element, a turned needle bearing or a separate type of retaining Needle roller bearings.