CN201027872Y

CN201027872Y - Full hydraulic extension spring reset open oil cylinder with constant brake clearance

Info

Publication number: CN201027872Y
Application number: CNU2007201041451U
Authority: CN
Inventors: 李福海; 纪新科; 温东
Original assignee: BEIJING PUSHIKE PETROLEUM MACHINERY NEW TECHNOLOGY Co Ltd
Current assignee: BEIJING PUSHIKE PETROLEUM MACHINERY NEW TECHNOLOGY Co Ltd
Priority date: 2007-04-05
Filing date: 2007-04-05
Publication date: 2008-02-27
Anticipated expiration: 2017-04-05

Abstract

The utility model provides an open type oil cylinder of full hydraulic pullback spring restoration constant brake clearance and relates to the brake clamp technique used for oil borer and can automatically adjust and control the exterior pullback spring restoration constant brake clearance. A main piston and an auxiliary piston are serially connected in a cylinder body with one end opened; a small control piston is arranged between the main piston and the auxiliary piston; the main piston is arranged on the opening end of the cylinder body; the auxiliary piston is provided with a holding valve; a seal ring and a dustproof ring are arranged between the pistons and the cylinder body; the stroke delta S of the main piston is the equivalent value of the brake clearance e. After a brake block is abraded, brake oil pressure passes through the holding valve and flows into a compensating oil cavity at the right side of the auxiliary piston, thereby the main piston and the auxiliary piston are pushed to move left simultaneously and the deficient stroke delta S is compensated to keep the brake clearance e unchanged and achieve normal brake. When the brake oil pressure is loosed, the holding valve is closed, the oil in the compensating oil cavity is kept, the displacement of the auxiliary piston is also kept, the main piston returns for delta S under the effect of the outer spring, and the process of braking is finished.

Description

The reset open type oil cylinder of permanent braking gap of all-hydraulic extension spring

Technical field

The utility model relates to a kind of hydraulic disc brake clamp device that is used for oil-well rig, and the full liquid principle of especially a kind of usefulness makes the braking clamp braking gap keep the open type brake oil cylinder of a desired constant value all the time automatically.

Background technique

The adjusting of the hydraulic disc brake braking gap that current oil-well rig is used adopts extension spring to add the movable joint screw or extension spring adds hydraulic pressure pilot plunger etc., belong to the artificial adjusting of level is arranged, be braking gap change to certain big after, the people is for being adjusted to certain value again, so circulation, in time adjust if fail, influence braking quality, the oil cylinder of the braking device that adopts does not have automatic stroke compensating action at present, can not carry out automated randomized compensation with the wearing and tearing of brake block, reach the work brake of permanent gap, can not make braking gap remain the reference value state.

The model utility content

In order to overcome existing braking clamp braking gap the artificial deficiency of irregularly regulating of level is arranged, the purpose of this utility model provides the reset open type oil cylinder of permanent braking gap of a kind of all-hydraulic extension spring, this oil cylinder can be with the stroke of the automated randomized stepless compensating cylinder of wearing and tearing of brake block, make the braking clamp braking gap remain the steady state value of standard, need not manual operation.

For achieving the above object, the technical solution of the utility model is:

The reset open type oil cylinder of permanent braking gap of a kind of all-hydraulic extension spring, the all-hydraulic outside extension spring permanent braking gap that resets; Its cylinder body is an end open type, and main piston and sub-piston be tandem arrangement in the cylinder body cavity volume, and main piston is positioned at the cylinder body open-mouth end, and seal ring and dust ring are arranged between piston and the cylinder body; Wherein,

The main piston central shaft is provided with blind hole, and Zhou Yuanbi is provided with elastic scheibe in the blind hole; Between major and minor piston middle part is axial small piston is arranged, the blind hole on small piston left end and the main piston central shaft is suitable, and is set in the blind hole, and the small piston left-external side pastes mutually with the blind hole bottom surface, and elastic scheibe is positioned at small piston left end right side; Sub-piston is a ring-type, and the center hole of small piston right-hand member and sub-piston is suitable, and stretches out sub-piston center hole right-hand member, and the center bore inner wall of microcephaly's periphery cylndrical surface and sub-piston is provided with seal ring;

The part that the small piston right-hand member stretches out the sub-piston center hole is provided with elastic scheibe, and elastic scheibe and sub-piston right flank be the company of subsides mutually;

Sub-piston is provided with passage, and passage one end communicates with active chamber between the major and minor piston, and the other end communicates with gap compensated cavity between sub-piston and the cylinder body closed end, is provided with one-way valve in the passage, and one-way valve is opened to gap compensated cavity direction;

Main piston exposes the uncovered side of cylinder body and is provided with the cylinder ear, and the outside of cylinder body closed end also is provided with the cylinder ear, and two cylinder ears are connected with external equipment and extension spring by bearing pin respectively.

Described open type oil cylinder, its described small piston is a T shape, and the blind hole on its major part and the main piston central shaft is suitable, and is set in the blind hole, and small piston major part left-external side pastes mutually with the blind hole bottom surface, and elastic scheibe is positioned at the outside, the small piston major part right side; The microcephaly of T shape small piston and the center hole of sub-piston are suitable, and stretch out sub-piston center hole right-hand member, and the center bore inner wall of microcephaly's periphery cylndrical surface and sub-piston is provided with seal ring.

Described open type oil cylinder, its described bearing pin is connected with outside extension spring, and extension spring is two, and the two ends of every extension spring are connected with the two ends of bearing pin respectively.

The beneficial effects of the utility model are: can control the compensating cylinder stroke automatically flexibly, need not artificial adjusting and can reach braking clamp permanent gap work, improve working efficiency, make brake soft, and structure and less complex, it is less demanding to adjust manufacturing technology.

Description of drawings

Fig. 1 is the structural representation of the utility model oil cylinder; Wherein, Fig. 1 (A) is a plan view, and Fig. 1 (B) is a sectional drawing;

Fig. 2 is application of the present utility model---the structural representation of hydraulic control disc brake calliper.

Embodiment

The reset open type oil cylinder of permanent braking gap of the all-hydraulic extension spring of the utility model, its structure is seen Fig. 1.

In Fig. 1, cylinder body 11 is an end open type, main piston 1 and sub-piston 6 be tandem arrangement in cylinder body 11 cavity volumes, main piston 1 is positioned at cylinder body 11 open-mouth ends,

seal ring

3,5 and dust ring 2 are arranged between piston and the cylinder body 11, main piston 1 central shaft is provided with blind hole, and Zhou Yuanbi is provided with elastic scheibe 4 in the blind hole, makes Stroke Control and uses.Between major and

minor piston

1,6 middle parts are axial small piston 10 is arranged, small piston 10 is T-shaped, and the blind hole on its major part and main piston 1 central shaft is suitable, and is set in the blind hole, small piston 10 major part left-external sides paste mutually with the blind hole bottom surface, and elastic scheibe 4 is positioned at the outside, the small piston 10 major part right sides; Sub-piston 6 is a ring-type, and the microcephaly of T shape small piston 10 and the center hole of sub-piston 6 are suitable, and microcephaly's periphery circle side is provided with seal ring 8, and seal ring 8 is dynamically connected with the center bore inner wall of sub-piston 6.The part that small piston 10 microcephalies stretch out sub-piston 6 center holes is provided with elastic scheibe 9, and being connected by elastic scheibe 9 of small piston 10 and sub-piston 6 realizes.Sub-piston 6 is provided with passage, passage one end communicates with gap between the major and

minor piston

1,6, gap between the major and

minor piston

1,6 constitutes active chamber 19, the other end communicates with gap compensated cavity 20 between sub-piston 6 and cylinder body 11 closed ends, be provided with one-way valve 7 in the passage, one-way valve 7 is opened to gap compensated cavity 20 directions.Main piston 1 exposes cylinder body 11 uncovered sides and is provided with the cylinder ear, and the outside of cylinder body 11 closed ends also is provided with the cylinder ear, and two cylinder ears are connected with external equipment and extension spring 12 by bearing pin respectively.

Extension spring 12 is two, and the two ends of every extension spring 12 are connected with the two ends of bearing pin respectively.

Work use of the present utility model and gap adjustment principle are seen Fig. 2.

In embodiment shown in Figure 2, the braking clamp of forming for the open type oil cylinder of the permanent braking gap that resets with the all-hydraulic extension spring of the utility model, tong holder 16 is fixed, 17 of brake discs are done fore-and-aft direction and are rotatablely moved, supporting axle 15 relative fixed are on tong holder 16, the middle part of two tong arms 14 is hinged on the two ends of supporting axle 15 respectively, and two cylinder ears of oil cylinder 13 link to each other by a hinged end with two tong arms 14 respectively, and two brake block 18 link to each other by the hinged the other end with two tong arms 14.After the oil-filled pressure of oil cylinder 13 hydraulic fluid ports, press oil to enter active chamber 19 by oil circuit, the pulling force promotion main piston 1 that oil pressure overcomes extension spring 12 moves to left, and at this moment tong arm 14 is around swing inwardly contact brake disc 17 brakes of brake block 18 with the articulating point of supporting axle 15.After oil pressure released, oil pressure was 0 in the active chamber 19, and main piston 1 resets under extension spring 12 power effects, and brake block 18 and brake disc 17 disengage pine and stop.The stroke Δ S of the elastic scheibe 4 control main pistons 1 of main piston 1, stroke Δ S and braking gap e are proportional, i.e. the scaled value of braking gap e.

Continuous increase along with the positive braking number of times, brake block 18 produces wearing and tearing, brake disc 17 also has wearing and tearing, and braking gap e value will increase, after braking gap e value increases, Δ S just can not satisfy the requirement of permanent gap e, oil pressure is just opened from dynamic pressure one-way valve 7, enters the gap compensated cavity 20 on sub-piston 6 right sides by one-way valve 7, and sub-piston 10 is moved to left, small piston 10 also utilizes circlip 9 drive sub-pistons 6 and main piston 1 to move together simultaneously, reaches permanent gap e brake; After the brake oil pressure releases, under the pressure difference effect, one-way valve 7 is closed automatically, and the fluid in the gap compensated cavity 20 on sub-piston 6 right sides keeps, and has compensated piston stroke, main piston 1 travelling backwards Δ S under extension spring 12 effects stops apart from pine, continuous wearing and tearing with brake block 18 like this, under the one-way valve action of pressure, the stroke of automatic compensating piston, keep braking gap e value constant, reach the brake of permanent gap.

Claims

1. the all-hydraulic extension spring open type oil cylinder of permanent braking gap that resets, the all-hydraulic outside extension spring permanent braking gap that resets; It is characterized in that: cylinder body is an end open type, and main piston and sub-piston be tandem arrangement in the cylinder body cavity volume, major-minor piston central part positioning string dress control small piston, and main piston is positioned at the cylinder body open-mouth end, and seal ring and dust ring are arranged between piston and the cylinder body; Wherein,

The main piston central shaft is provided with blind hole, and Zhou Yuanbi is provided with elastic scheibe in the blind hole; There is small piston at major and minor piston middle part between axially, and the blind hole on small piston left end and the main piston central shaft is suitable, and is set in the blind hole, and small piston left-external side and blind hole bottom surface be the company of subsides mutually, and elastic scheibe is positioned at small piston left end right side; Sub-piston is a ring-type, and the center hole of small piston right-hand member and sub-piston is suitable, and stretches out sub-piston center hole right-hand member, and microcephaly's periphery disc is provided with seal ring, and the center bore inner wall of seal ring and sub-piston is dynamically connected;

2. open type oil cylinder according to claim 1, it is characterized in that: described small piston is a T shape, and the blind hole on its major part and the main piston central shaft is suitable, and is set in the blind hole, small piston major part left-external side pastes mutually with the blind hole bottom surface, and elastic scheibe is positioned at the outside, the small piston major part right side; The microcephaly of T shape small piston and the center hole of sub-piston are suitable, and stretch out sub-piston center hole right-hand member, and the part that the small piston right-hand member stretches out the sub-piston center hole is provided with elastic scheibe.

3. open type oil cylinder according to claim 1 is characterized in that: described bearing pin is connected with outside extension spring, and extension spring is two, and the two ends of every extension spring are connected with the two ends of bearing pin respectively.