CN202138985U

CN202138985U - Oil return speed adjustable device for jack

Info

Publication number: CN202138985U
Application number: CN201120249108U
Authority: CN
Inventors: 周爱兴
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-07-13
Filing date: 2011-07-13
Publication date: 2012-02-08
Anticipated expiration: 2021-07-13

Abstract

The utility model discloses an oil return speed adjustable device for a jack. The oil return speed adjustable device, which has a simple structure and good reliability and is anti-clogging, comprises a jack switch; through the jack switch, a large oil cylinder and an oil tank are opened or closed; the jack switch comprises a valve port; the valve port communicated with the large oil cylinder is formed on a jack seat; a steel ball is mounted at the mouth of the valve port; a switch knob screwed into the jack seat through threads is mounted at the rear end of the steel ball; and an oil return hole communicated with an oil return tank is formed on the side surface of a threaded hole. The utility model is characterized in that when the switch is turned off, the mouth of the oil return hole faces the threaded section on the switch knob; when the switch is turned on to be oil return state, the mouth of the oil return hole faces a space between the threaded section of the switch knob and a section with the external diameter smaller than that of the threaded section. An oil drain gap of the oil inlet/return hole is adjusted by the threads, so that the opening adjustment can be very accurate. The utility model has the advantages that the oil drain speed is adjustable, the adjusting amount is accurate, and the oil drain gap is not easily clogged.

Description

Jack oil return speed tunable arrangement

Technical field

The utility model relates to the adjustable device of a kind of hydraulic flow, particularly a kind of anti-blocking jack oil return speed tunable arrangement.

Background technology

Jack is the most frequently used hydraulic tool or device; When the large tank that behind the weight of jack-uping, needs unloading or stretch out need bounce back; Just open the oil return switch of locking, under the action of gravity of large tank plunger, make the oil in the large tank return fuel tank through fuel return hole.But in the speed that many occasions need make the weight of jack-up slowly descend or regulate decline, this did not also have in the hydraulic efficiency gear of ordinary jack or similar jack.Realize that such functional structure is complicated; And these throttling devices; In use restriction can be because of containing impurity or because the colloid of separating out after the polar molecule of fluid and the oxidation, pitch etc. partly are adsorbed on restriction in the oil; Thereby change original circulating face area, flow is changed even the restriction obstruction, and influence the control of flow.

The utility model content

The purpose of the utility model provides a kind of simple in structure, good reliability, anti-blocking jack oil return speed tunable arrangement.

In order to address the above problem; The utility model is realized through following technical scheme: it includes the jack switch that large tank and fuel tank are opened or closed; Described jack switch includes and on jack pad assembly, is shaped on the valve opening logical with large tank; Valve orifice is equipped with steel ball, in the rear end of steel ball the switch handle that is threaded into jack pad assembly is installed, and is shaped on the fuel return hole that communicates with oil sump tank in the side of tapped bore; It is characterized in that when the switch closed condition described oil return aperture facing to the thread segment on the switch handle, when switch oil return state described oil return aperture facing to the thread segment on the switch handle and external diameter less than thread segment between.

Thread segment front end on the said switch handle is shaped on chamfering.

According to the jack oil return speed tunable arrangement that such scheme is made, its flow control is rotated by handle, controls; When draining, when the handle rotation was retreated, at first steel ball was thrown off valve opening; The hydraulic oil of large tank through valve opening to the front end of tapped bore, and according to the degree of retreating of handle, the gap length between jack pad assembly and the spool; Hydraulic oil gets into fuel return hole from handle thread segment front end, because the draining gap in oil inlet and oil return hole is regulated by screw thread; Therefore, the adjusting of its aperture can be accomplished very accurate.When the front end at thread segment was shaped on chamfering, the adjusting of its aperture can be accomplished more accurate, and hydraulic oil can flow to the fuel return hole oil-feed tank in the gap between screw thread pair, whole gap ringwise or spiral fashion, the draining gap just is not easy to stop up.Therefore it has the draining adjustable-speed, and regulated quantity is accurate, and susceptible to plugging advantage is not allowed in the draining gap.

Description of drawings

Fig. 1 is the structural representation of jack oil return speed tunable arrangement when the switch closed condition;

Fig. 2 is the structural representation of switch handle;

Fig. 3 is the structural representation of jack oil return speed tunable arrangement when switch open state draining.

Wherein: 1, jack pad assembly; 2, valve opening; 3, steel ball; 4, switch handle; 5, tapped bore; 6, fuel return hole; 7, thread segment; 8, chamfering.

The specific embodiment

Below in conjunction with accompanying drawing and specific embodiment the utility model is done further to describe.

Fig. 1 is that jack oil return speed tunable arrangement is installed in the structural representation on the jack.From figure, find out; It includes the jack switch that large tank and fuel tank are opened or closed, and described jack switch includes and on jack pad assembly 1, is shaped on the valve opening 2 logical with large tank, and valve opening is equipped with steel ball 3 for 2 mouthfuls; It is as shown in Figure 2 that the switch handle 4 that is threaded into jack pad assembly 1 is installed in the rear end of steel ball 3; Be shaped on the fuel return hole 6 that communicates with oil sump tank in the side of tapped bore 5, when the switch closed condition, 6 mouthfuls of thread segments 7 that face toward on the switch handle 4 of described fuel return hole; Steel ball 3 is being pressed on the top of switch handle 4, blocks valve opening 2.As shown in Figure 3 when switch oil return state, 6 mouthfuls of described fuel return holes facing to the thread segment 7 on the switch handle 4 and external diameter less than between the thread segment 7.Oil circuit trend during oil return is shown in the arrow points among Fig. 3.Thread segment 7 front ends on the switch handle 4 are shaped on chamfering 8.

Claims

1. jack oil return speed tunable arrangement; It includes the jack switch that large tank and fuel tank are opened or closed; Described jack switch includes and on jack pad assembly, is shaped on the valve opening logical with large tank; Valve orifice is equipped with steel ball, in the rear end of steel ball the switch handle that is threaded into jack pad assembly is installed, and is shaped on the fuel return hole that communicates with oil sump tank in the side of tapped bore; It is characterized in that when the switch closed condition described oil return aperture facing to the thread segment on the switch handle, when switch oil return state described oil return aperture facing to the thread segment on the switch handle and external diameter less than thread segment between.

2. jack oil return speed tunable arrangement according to claim 1 is characterized in that the thread segment front end on the said switch handle is shaped on chamfering.