CN201696243U

CN201696243U - Lifting oil pump for cab

Info

Publication number: CN201696243U
Application number: CN201020207388XU
Authority: CN
Inventors: 陈洪福; 冯永清; 赵俊
Original assignee: CHANGZHOU XIELI AUTO PARTS Co Ltd
Current assignee: CHANGZHOU XIELI AUTO PARTS Co Ltd
Priority date: 2010-05-28
Filing date: 2010-05-28
Publication date: 2011-01-05
Anticipated expiration: 2020-05-28

Abstract

The utility model discloses a lifting oil pump for a cab, which comprises a pump shell, a pump cover, a change valve, a plunger pair, a shifting fork, a bidirectional valve cover, an oil inlet joint, an oil outlet joint and a return spring. The pump cover is fixedly connected at the lower end of the pump shell, the change valve is arranged on the pump cover, the oil inlet joint and the oil outlet joint are fixedly connected at the lower end of the pump cover, the pump cover is provided with an installation lug boss, the installation lug boss is located in an inner cavity of the pump shell, a plunger cylinder of the plunger pair is fixedly connected on an inner hole of the installation lug boss, the bidirectional valve cover is fixedly connected on a lug boss on the upper end face or the lower end face of the pump shell, a first one-way valve and a second one-way valve are arranged on the bidirectional valve cover, an inlet of the first one-way valve is communicated with the inner cavity of the pump shell, an outlet of the first one-way valve is communicated with the inlet of the second one-way valve and is communicated with the atmosphere outside the pump shell by a vent hole, and the outlet of the second one-way valve is communicated with the inner cavity of the pump shell. The lifting oil pump can reduce oil seepage and leakage.

Description

The operator cabin lifting oil pump

Technical field

The utility model relates to a kind of oil pump, especially a kind of automobile cab lifting oil pump.

Background technique

The operator cabin lifting oil pump is for the parts such as the motor that services a car the time, the oil pump that the operator cabin lifting is got up, the two-way valve gap of common operator cabin lifting oil pump is positioned at the side of pump case, this structure exists shortcoming to be, if the hydraulic pressure pasta surpasses the exhaust port of two-way valve gap in the operator cabin lifting oil pump, the pump case internal air pressure raises, gas pressure is on the hydraulic pressure pasta, air can't be discharged by two-way valve gap, when pressure is enough opened two-way valve gap, hydraulic oil can ooze out by two-way valve gap, and generation is oozed, oil leakage phenomenon.

Summary of the invention

The purpose of this utility model is to provide a kind of energy to reduce oozes, the operator cabin lifting oil pump of oil leakage phenomenon.

In order to achieve the above object, the technical solution of the utility model is: a kind of operator cabin lifting oil pump, comprise pump case, pump cover, selector valve, plunger is paid, shift fork, two-way valve gap, fuel inlet fitting, delivery connection and Returnning spring, pump cover is fixedly connected on the lower end of pump case, selector valve is contained on the pump cover, fixedly connected fuel inlet fitting in the lower end of pump cover and delivery connection, pump cover has installation base, and installation base is positioned at the inner chamber of pump case, the plunger tube that plunger is paid is fixedly connected on the endoporus of installation base, the inner chamber of plunger tube communicates with the inner chamber and the selector valve of pump case by one-way valve, one end of Returnning spring and the plunger rod that plunger is paid offset, the other end and installation base offset, shift fork and pump case are hinged, and have and stretch out the outer external part of pump case, the other end of shift fork is connected with the plunger rod that plunger is paid or offsets, two-way valve gap is fixedly connected on the upper-end surface of pump case or on the boss of upper-end surface, two-way valve covers first one-way valve and second one-way valve is housed, the import of first one-way valve communicates with the inner chamber of pump case, the outlet of first one-way valve communicates with the import of second one-way valve and communicates by the outer atmosphere of exhaust port and pump case, and the outlet of second one-way valve communicates with the inner chamber of pump case.

The upper end of the plunger rod that described plunger is paid has positive stop lug boss, and an end of Returnning spring and the positive stop lug boss on the plunger rod offset.

Has handle hole on the external part of described shift fork.

The side of described pump case has the fixing protruding wing, has mounting hole on the fixing protruding wing.

After adopting said structure, because two-way valve gap is fixedly connected on the upper-end surface of pump case or on the boss of upper-end surface, two-way valve covers first one-way valve and second one-way valve is housed, the import of first one-way valve communicates with the inner chamber of pump case, the outlet of first one-way valve communicates with the import of second one-way valve and communicates by the outer atmosphere of exhaust port and pump case, the outlet of second one-way valve communicates with the inner chamber of pump case, this kind structure hydraulic pasta can not surpass two-way valve gap, when the pump case internal air pressure raises, air is directly discharged from two-way valve gap, after air in time obtains discharging, reduced the burden of low pressure seal element, oozed thereby reduced, oil leakage phenomenon.

Description of drawings

Fig. 1 is a structure complete section schematic representation of the present utility model;

Fig. 2 is Fig. 1 left view;

Fig. 3 is the I portion zoomed-in view of Fig. 1.

Embodiment

The embodiment who provides below in conjunction with accompanying drawing is described in further detail the utility model.

Referring to Fig. 1,2, shown in 3, a kind of operator cabin lifting oil pump, comprise pump case 1, pump cover 2, selector valve 3, plunger pays 4, shift fork 5, two-way valve gap 6, fuel inlet fitting 7, delivery connection 8 and Returnning spring 9, pump cover 2 is fixedly connected on the lower end of pump case 1, selector valve 3 is contained on the pump cover 2, fixedly connected fuel inlet fitting 7 in the lower end of pump cover 2 and delivery connection 8, pump cover 2 has installation base 2-1, and installation base 2-1 is positioned at the inner chamber 1-3 of pump case 1, plunger is paid 4 plunger tube 4-2 and is fixedly connected on the endoporus of installation base 1-1, the inner chamber of plunger tube 4-2 communicates with the inner chamber 1-3 and the selector valve 3 of pump case 1 by one-way valve 4-3, one end of Returnning spring 9 and plunger are paid 4 plunger rod 4-1 and are offseted, the other end and installation base 1-1 offset, shift fork 5 is hinged with pump case 1, and have and stretch out the outer external part 5-1 of pump case 1, the other end of shift fork 5 and plunger are paid 4 plunger rod 4-1 and are offseted, the upper-end surface 1-4 that two-way valve gap 6 is fixedly connected on pump case 1 go up or the boss 1-4-1 of upper-end surface 1-4 on, the first one-way valve 6-1 and the second one-way valve 6-2 are housed on the two-way valve gap 6, the import of the first one-way valve 6-1 communicates with the inner chamber 1-3 of pump case 1, the outlet of the first one-way valve 6-1 communicates with the import of the second one-way valve 6-2 and communicates with pump case 1 outer atmosphere by exhaust port 6-3, and the outlet of the second one-way valve 6-2 communicates with the inner chamber 1-3 of pump case 1.

Referring to shown in Figure 1, for the ease of Returnning spring 9 is installed, the upper end that described plunger is paid 4 plunger rod 4-1 has positive stop lug boss 4-1-1, and an end of Returnning spring 9 and the positive stop lug boss 4-1-1 on the plunger rod 4-1 offset.

Referring to shown in Figure 2,, has handle hole 5-1-1 on the external part 5-1 of described shift fork 5 for artificial easy-to-operat shift fork 5.

Referring to shown in Figure 2, for convenience the utility model is fixed on the automobile, the side of described pump case 1 has fixing protruding wing 1-2, has mounting hole 1-2-1 on the fixing protruding wing 1-2.

Shown in Fig. 1,2, when the utility model uses, stir shift fork 5 in the handle hole 5-1-1 of artificial tool using insertion shift fork 5 external part 5-1, make shift fork 5 rotations, the other end of shift fork 5 is paid 4 plunger rod 4-1 plunger and is pressed down, oil in the plunger 4 enter oil cylinder by selector valve 3 and the fuel-displaced pipeline that is connected on the delivery connection 8, make the operator cabin lifting; Paying 4 the plunger rod 4-1 elastic force by Returnning spring 9 when plunger rises down, the negative pressure that produces makes the interior oil of the inner chamber 1-3 of pump case 1 flow into plungers by selector valve 3 and pays in 4, circulation successively, pump case 1 internal air pressure is too high, the first one-way valve 6-1 that will touch in the two-way valve gap 6 opens, and exhausting air reduces the air pressure in the pump case 1.

Claims

1. operator cabin lifting oil pump, comprise pump case (1), pump cover (2), selector valve (3), plunger is paid (4), shift fork (5), two-way valve gap (6), fuel inlet fitting (7), delivery connection (8) and Returnning spring (9), pump cover (2) is fixedly connected on the lower end of pump case (1), selector valve (3) is contained on the pump cover (2), the fixedly connected fuel inlet fitting in lower end (7) of pump cover (2) and delivery connection (8), pump cover (2) has installation base (2-1), and installation base (2-1) is positioned at the inner chamber (1-3) of pump case (1), the plunger tube (4-2) that plunger is paid (4) is fixedly connected on the endoporus of installation base (1-1), the inner chamber of plunger tube (4-2) communicates with the inner chamber (1-3) and the selector valve (3) of pump case (1) by one-way valve (4-3), the plunger rod (4-1) that one end and the plunger of Returnning spring (9) paid (4) offsets, the other end and installation base (1-1) offset, shift fork (5) is hinged with pump case (1), and have and stretch out the outer external part (5-1) of pump case (1), the other end of shift fork (5) is paid (4) with plunger plunger rod (4-1) is connected or offsets, it is characterized in that: the upper-end surface (1-4) that two-way valve gap (6) is fixedly connected on pump case (1) go up or the boss (1-4-1) of upper-end surface (1-4) on, first one-way valve (6-1) and second one-way valve (6-2) are housed on the two-way valve gap (6), the import of first one-way valve (6-1) communicates with the inner chamber (1-3) of pump case (1), the outlet of first one-way valve (6-1) communicates with the import of second one-way valve (6-2) and communicates with the outer atmosphere of pump case (1) by exhaust port (6-3), and the outlet of second one-way valve (6-2) communicates with the inner chamber (1-3) of pump case (1).

2. operator cabin lifting oil pump according to claim 1, it is characterized in that: the upper end that described plunger is paid the plunger rod (4-1) of (4) has positive stop lug boss (4-1-1), and the positive stop lug boss (4-1-1) on an end of Returnning spring (9) and the plunger rod (4-1) offsets.

3. operator cabin lifting oil pump according to claim 1 is characterized in that: have handle hole (5-1-1) on the external part (5-1) of described shift fork (5).

4. operator cabin lifting oil pump according to claim 1 is characterized in that: the side of described pump case (1) has the fixing protruding wing (1-2), has mounting hole (1-2-1) on the fixing protruding wing (1-2).