CN101968052A

CN101968052A - High-pressure gear oil pump

Info

Publication number: CN101968052A
Application number: CN 201010542770
Authority: CN
Inventors: 陈文辉; 陈海强; 邓玉; 孙小平; 刘伟
Original assignee: Hefei Changyuan Hydraulics Co Ltd
Current assignee: Hefei Changyuan Hydraulics Co Ltd
Priority date: 2010-11-12
Filing date: 2010-11-12
Publication date: 2011-02-09

Abstract

The invention discloses a high-pressure gear oil pump which is characterized in that a front cover, a rear cover and a pump body adopt three-section type structures, a perforating type positioning pin is arranged on the pump body and perforates through the pump body along an axial direction, a front-cover positioning pin pole and a rear-cover positioning pin pole are coaxially extended on the front end surface and the rear end surface of the pump body and are respectively connected with a front cover and a rear cover, and oil holes are arranged on the rear cover and comprise a lateral oil inlet positioned on one side of the rear cover, a lateral oil outlet positioned on the other side of the rear cover or an end oil inlet and an end oil outlet which are positioned on the end surface of the rear cover. The invention not only can adopt a last-in and last-out external connection mode, but also can adopt a side-in and side-out external connection mode.

Description

High pressure gear oil pump

Technical field

The present invention relates to gear oil pump, be applicable to industries such as lifting handling machinery, road building machine, environmental protection machinery, light industry and machinery as the hydraulic system dynamical element.

Background technique

Shown in Figure 4, in the prior art, the pump housing 4 of gear oil pump and protecgulum 2, the pump housing 4 and bonnet 5 are to position connection by short positioning dowel 3, existing problem is on the both ends of the surface of the pump housing 4 during the processing positioning pin hole, coaxality and position accuracy be difficult to guarantee, thereby be difficult to guarantee the positional accuracy of spindle hole on gear hole on the pump housing 4 and the protecgulum 2, increased the radial force of driving gear 1 thus, reduce the working life of gear oil pump, reduced product performance.

In the prior art,, can only be to adopt side to advance the outer connection mode that side goes out or the outer connection mode of last-in, last-out on the connecting mode of oil inlet and outlet, have significant limitation at same pump.

Summary of the invention

The present invention is for avoiding above-mentioned existing in prior technology deficiency, provide a kind of simple in structure, the high pressure gear oil pump of unique outlook, in the hope of on the pump housing, adopting the anti-offset structure of penetration type locating stud, to improve the coaxality and the positional accuracy of locating stud, thereby the positional accuracy of spindle hole on gear hole on the assurance pump housing and the protecgulum, make the suffered radial force of driving gear reduce to minimum, increase the working life of gear oil pump, enhance product performance, and on same pump, realize both can having adopted side to advance the outer connection mode that outer connection mode that side goes out also can adopt last-in, last-out.

Technical solution problem of the present invention adopts following technological scheme:

Gear oil pump of the present invention has a pair of intermeshing driving gear and driven gear, constitutes pump case with protecgulum, bonnet and the pump housing, and its structural feature is:

Described protecgulum, bonnet and the pump housing adopt three stage structure, the penetration type locating stud is set on the described pump housing, described penetration type locating stud runs through the pump housing vertically and extend to form coaxial protecgulum positioning pin column and bonnet positioning pin column on the front-end face of the pump housing and ear end face, is connected protecgulum and bonnet with described protecgulum positioning pin column with the bonnet positioning pin column respectively;

Each hydraulic fluid port is set on described bonnet, and described each hydraulic fluid port is respectively: be positioned at the sidepiece filler opening of bonnet one side, be positioned at the sidepiece oil outlet of bonnet opposite side, or be positioned at end filler opening and end oil outlet on the end face of bonnet; Logical oil pocket road is set in described bonnet, is communicated with the inner chamber formation of the pump housing at each hydraulic fluid port with described logical oil pocket road.

The structural feature of gear oil pump of the present invention also is: be arranged at described bonnet on the end face of inner chamber of the pump housing bearing hole is set, driving gear and driven gear are supported in the bearing hole of described bonnet.

Compared with the prior art, beneficial effect of the present invention is embodied in:

1, the present invention adopts the penetration type locating stud, thoroughly eliminated skew, improved the positional accuracy of positioning pin hole, thereby guaranteed the positional accuracy of spindle hole on gear hole on the pump housing and the protecgulum, make the suffered radial force of driving gear reduce to minimum, increase the working life of gear oil pump, reduced difficulty of processing, improved product performance.

2, the present invention both can adopt the outer connection mode of last-in, last-out, also can adopt side to advance the outer connection mode that side goes out, and made its application more flexible, can satisfy the different needs of user, and adaptability is strong.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a bonnet floor map of the present invention;

Fig. 2 a advances the bonnet side schematic view that side goes out structure for side of the present invention;

Fig. 2 b is the A-A generalized section of Fig. 2 a;

Fig. 3 a is the bonnet end view of last-in, last-out structure of the present invention;

Fig. 3 b is the B-B generalized section of Fig. 3 a;

Fig. 4 is a prior art middle gear oil pump structure schematic representation.

Number in the figure: 1 driving gear, 2 protecgulums, 3 locating studs, 4 pump housings, 5 bonnets, 6 driven gears, 7 sidepiece filler openings, 8 sidepiece oil outlets, 9 end filler openings, 10 end oil outlets, 11 logical oil pocket roads, 12 bearing holes.

Embodiment

Referring to Fig. 1, Fig. 2, present embodiment is to constitute pump case with protecgulum 2, bonnet 5 and the pump housing 4, has a pair of intermeshing driving gear 1 and driven gear 6 in pump case;

Shown in Figure 1, protecgulum 2, bonnet 5 and the pump housing 4 adopt three stage structure in the present embodiment, penetration type locating stud 3 is set on the pump housing 4, penetration type locating stud 3 runs through the pump housing 4 vertically and extend to form coaxial protecgulum positioning pin column and bonnet positioning pin column on the front-end face of the pump housing 4 and ear end face, is connected protecgulum 2 and bonnet 5 with the bonnet locating stud with the protecgulum locating stud respectively; This anti-offset structure has effectively improved the positional accuracy of positioning pin hole, guarantees the positional accuracy of spindle hole on gear hole on the pump housing and the protecgulum, and the suffered radial force of driving gear is reduced greatly, increased gear oil pump working life, enhance product performance.

In the present embodiment, each hydraulic fluid port is set on bonnet 5, is respectively: sidepiece filler opening that is positioned at bonnet 5 one sides 7 shown in figure Fig. 2 a and Fig. 2 b and the sidepiece oil outlet 8 that is positioned at bonnet 5 opposite sides; Or end filler opening 9 on the end face that is positioned at bonnet 5 shown in Fig. 3 a and Fig. 3 b and end oil outlet 10; Logical oil pocket road 11 is set in bonnet 5, is communicated with the inner chamber formation of the pump housing 4 at each hydraulic fluid port with logical oil pocket road 11.This form makes this oil pump both can adopt the outer connection mode of last-in, last-out, also can adopt side to advance the outer connection mode that side goes out, and satisfies different requirements of customers, and adaptability is strong.

In concrete the enforcement, be arranged at bonnet 5 on the end face of inner chamber of the pump housing bearing hole 12 is set, driving gear 1 and driven gear 6 are supported in the bearing hole 12 of bonnet 5, this structural type makes gear oil pump compact structure more, reduced installing space, simultaneously also effectively reduce axial dimension, reduce production costs.

Claims

1. a high pressure gear oil pump has a pair of intermeshing driving gear (1) and driven gear (6), constitutes pump case with protecgulum (2), bonnet (5) and the pump housing (4), it is characterized in that:

Described protecgulum (2), bonnet (5) and the pump housing (4) adopt three stage structure, penetration type locating stud (3) is set on the described pump housing (4), described penetration type locating stud (3) runs through the pump housing (4) vertically and extend to form coaxial protecgulum positioning pin column and bonnet positioning pin column on the front-end face of the pump housing (4) and ear end face, is connected protecgulum (2) and bonnet (5) with the bonnet positioning pin column with described protecgulum positioning pin column respectively;

On described bonnet (5), each hydraulic fluid port is set, described each hydraulic fluid port is respectively: the sidepiece filler opening (7) that is positioned at bonnet (5) one sides, be positioned at the sidepiece oil outlet (8) of bonnet (5) opposite side, or be positioned at end filler opening (9) and end oil outlet (10) on the end face of bonnet (5); Logical oil pocket road (11) is set in described bonnet (5), is communicated with the inner chamber formation of the pump housing (4) at each hydraulic fluid port with described logical oil pocket road (11).

2. high pressure gear oil pump according to claim 1, it is characterized in that: be arranged at described bonnet (5) on the end face of inner chamber of the pump housing (4) bearing hole (12) is set, driving gear (1) and driven gear (6) are supported in the bearing hole (12) of described bonnet (5).