CN217107665U

CN217107665U - Normally open type oil cylinder with self-adjusting clearance

Info

Publication number: CN217107665U
Application number: CN202220767232.XU
Authority: CN
Inventors: 王爱国; 荆有为; 於贤超
Original assignee: Renqiu Collier Electromechanical Equipment Co ltd
Current assignee: Renqiu Collier Electromechanical Equipment Co ltd
Priority date: 2022-04-06
Filing date: 2022-04-06
Publication date: 2022-08-02
Anticipated expiration: 2032-04-06

Abstract

The utility model discloses a normally open type oil cylinder with a self-adjusting clearance, which comprises an oil cylinder body, wherein an opening at one end of the oil cylinder body is fixedly provided with an oil cylinder cover, an adjusting cavity and a working cavity are arranged in the oil cylinder body, a limiting sleeve is arranged in the oil cylinder body, a limiting platform at one side of the limiting sleeve is abutted against the inner step surface of the oil cylinder body, an adjusting piston is arranged in the limiting sleeve and can do linear reciprocating motion along the limiting sleeve, and one end of the adjusting piston extends out of the oil cylinder body; floating working piston installs in the working cavity of hydro-cylinder body, is provided with one-way relief valve on the floating working piston, the utility model discloses the leakproofness mutually noninterfere of two cavitys in the hydro-cylinder body, double piston only one piston stretches out the hydro-cylinder, has solved hydro-cylinder body and has not strong point, unstability, makes equipment more reliable and more stable when letting the clearance obtain the compensation, the utility model discloses can be stable, the stroke of automatic compensation hydro-cylinder change reliably, let hydraulic disc brake automatic maintenance the brake clearance of an ideal all the time.

Description

Normally open type oil cylinder with self-adjusting clearance

Technical Field

The utility model relates to an oil-well rig, workover rig, geological prospecting rig, wind generating set and marine anchor windlass hydraulic pressure disc brake field, especially a self-interacting clearance normally open hydro-cylinder.

Background

At present, a hydraulic disc brake device is widely applied to winches of oil drilling machines and workover rigs as a standard brake system, and is used as a normally-opened clamp mainly used for controlling the drilling machine and the workover rig to feed, adjust the bit pressure and adjust the speed of tripping the drill.

The common working pliers in the market at present mainly have the forms of adjusting the extension amount of a tension spring, adjusting the extension amount of a piston by a nut, adjusting the extension amount of the piston by manual oil injection and the like, and the forms have the condition of high labor intensity of workers or frequent invalid operation.

Disclosure of Invention

The utility model provides a normally open hydro-cylinder in self-interacting clearance can be stable, the stroke that the automatic compensation hydro-cylinder changes reliably, lets hydraulic disc brake automatic all the time keep a reasonable, invariable brake clearance. The specific scheme is as follows:

the utility model provides a normally open hydro-cylinder in self-interacting clearance, includes the hydro-cylinder body, and the one end opening part fixed mounting of hydro-cylinder body has hydro-cylinder cap, its characterized in that: the adjusting piston is arranged in the limiting sleeve and can do linear reciprocating motion along the limiting sleeve, and one end of the adjusting piston extends out of the cylinder body of the oil cylinder; floating working piston installs in the working chamber of hydro-cylinder body, and this working chamber communicates with the oil inlet on the hydro-cylinder body, is provided with one-way relief valve on the floating working piston, can restrict the passing through of hydraulic oil through one-way relief valve.

The adjusting piston is a T-shaped piston, a through hole is arranged in a piston rod of the adjusting piston, and the through hole is communicated with an exhaust joint arranged on the adjusting piston and used for exhausting air in a cavity between the adjusting piston and the floating type working piston.

One end of the adjusting piston close to the floating type working piston is provided with an adjusting sleeve, and the adjusting sleeve is fixedly connected with the adjusting piston through a fixing bolt.

A round hole is formed in the left side of a piston rod of the adjusting piston, and a copper sleeve is arranged in the round hole.

The floating type working piston is in a circular plate shape, a through hole is formed in the center of the left side of the floating type working piston and is coaxially communicated with a threaded hole in the center of the right side of the floating type working piston, and the one-way safety valve is installed in the threaded hole.

The cylinder cover passes through the adjusting piston and is fastened with the cylinder body of the cylinder through a bolt and a spring washer, and when the adjusting piston moves along the limiting sleeve, the cylinder cover can centralize the adjusting piston.

The cylinder cover of the oil cylinder is provided with a through hole which is communicated with the adjusting cavity, and the through hole is provided with a respirator which enables the adjusting cavity to be communicated with the outside atmosphere.

A circular hole is formed in the boss on the right side of the cylinder body of the oil cylinder, and a copper sleeve is arranged in the circular hole.

The adjusting piston, the limiting sleeve and the oil cylinder body are coaxial.

The cylinder cover, the adjusting piston and the floating working piston are all provided with a sealing ring and a guide belt; the limit sleeve is provided with a seal ring.

The utility model has the advantages of simple structure and reasonable design, the leakproofness mutually noninterfere of two cavitys in the hydro-cylinder body, the hydro-cylinder is stretched out to the double piston only one piston, unilateral piston stretches out the hydro-cylinder and replaces the double piston to stretch out the hydro-cylinder, the hydro-cylinder body does not have strong point, the unstability has been solved, the short oil leak problem of sealing member life-span to make equipment more stable and reliable when letting the clearance obtain the compensation, improve braking response speed, hydro-cylinder and sealed life have greatly been guaranteed, reduce workman intensity of labour and invalid operation. The utility model discloses can be stable, the stroke that automatic compensation hydro-cylinder changes reliably, let hydraulic disc brake automatic all the time keep a reasonable, invariable brake clearance, improved the reliability that hydraulic disc stopped greatly, reduced intensity of labour.

Drawings

FIG. 1 is a schematic diagram of a normally open type oil cylinder with self-adjusting clearance according to the present invention;

fig. 2 is a schematic structural diagram of the self-gap-adjusting normally-open type cylinder of the present invention applied to a hydraulic disc brake apparatus.

In the figure: the hydraulic oil cylinder comprises an adjusting piston 1, a first sealing ring 2, a first guide belt 3, an oil cylinder cover 4, an adjusting cavity 5, an oil cylinder body 6, a floating type working piston 7, an exhaust joint 8, a second guide belt 9, a second sealing ring 10, a limiting sleeve 11, a third guide belt 12, a third sealing ring 13, a working oil cavity 14, a one-way safety valve 15, a breather 16, a fourth sealing ring 17, an adjusting sleeve 18, a fixing bolt 19, an oil inlet 20, a pin shaft III21, a spiral tension spring adjusting device 22, a working lever 23, a pin shaft II24, a support rod 25, a caliper frame 26, a pin shaft I27, a caliper body 28, a brake block 29 and a brake disc 30.

Detailed Description

The preferred embodiments of the present invention will be described with reference to the accompanying drawings, which are not intended to limit the scope of the invention, but rather, are intended to cover all modifications and equivalents of the claims.

As shown in fig. 1, the utility model discloses a normally open hydro-cylinder of self-interacting clearance includes hydro-cylinder body 6, is provided with limiting sleeve 11 in the hydro-cylinder body 6, and limiting sleeve 11 one side is provided with the spacing platform of inward bulge, and this spacing platform is inconsistent with the interior step face of hydro-cylinder body 6, is equipped with sealing washer four 17 on limiting sleeve 11's the outer disc.

The adjusting piston 1 is provided with a second sealing ring 9 and a second guide belt 10, the adjusting piston 1 is arranged in the limiting sleeve 11 and is positioned in the adjusting cavity 5 of the oil cylinder body 6, one end of the adjusting piston 1 extends out of the oil cylinder body 6, and the adjusting piston 1 can do linear reciprocating motion along the limiting sleeve 11. A round hole is formed in the left side of a piston rod of the adjusting piston 1, a copper sleeve is arranged in the round hole, and the adjusting piston 1 is connected with a working lever 23 through a pin shaft III 21. One end of the adjusting piston 1 close to the floating type working piston 7 is provided with an adjusting sleeve 18, the adjusting sleeve 18 is fixedly connected with the adjusting piston 1 through a fixing bolt 19, and the adjusting sleeve 18 can be used for adjusting the maximum expansion amount of the adjusting piston 1 and can be used on working pliers of different models.

Furthermore, the adjusting piston 1 is a T-shaped piston, and the adjusting piston 1, the limiting sleeve 11 and the cylinder body 6 are coaxial.

And a first sealing ring 2 and a first guide belt 3 are arranged on the cylinder cover 4, and the cylinder cover 4 penetrates through the adjusting piston 1 and is fastened with the cylinder body 6 through a bolt and a spring washer. When the adjusting piston 1 moves in the adjusting cavity 5 of the cylinder body 6, the cylinder cover 4 can centralize the adjusting piston 1. The cylinder cover 4 is also provided with a through hole which is communicated with the adjusting cavity 5, the through hole is provided with a breather 16, and the adjusting cavity 5 can be communicated with the outside atmosphere through the breather 16.

The floating type working piston 7 is in a circular plate shape, a sealing ring III 13 and a guide belt III 12 are arranged on the floating type working piston 7, and the floating type working piston 7 is arranged in a working cavity 14 of the oil cylinder body 6. The center of the left side of the floating type working piston 7 is provided with a through hole which is coaxially communicated with a threaded hole at the center of the right side of the floating type working piston 7, and a one-way safety valve 15 is arranged in the threaded hole.

The inside through-hole that is provided with of piston rod of adjusting piston 1, this through-hole is linked together with the exhaust joint 8 of installation on adjusting piston 1, when the hydro-cylinder assembly has hydraulic oil P to get into working chamber 14 from oil inlet 20, hydraulic oil promotes floating working piston 7 earlier and removes to the left side, make working piston 7 laminate mutually with the spacing sleeve 11 in the hydro-cylinder body 6, hydraulic oil pressure gets into the cavity between floating working piston 7 and the adjusting piston 1 through one-way relief valve 15 when being greater than a definite value, after being full of hydraulic oil in this cavity, hydraulic oil continues to promote adjusting piston 1 and removes to hydro-cylinder cap 4 direction. In the process that the cavity is filled with hydraulic oil, the air initially stored in the cavity can be extruded out of the oil cylinder by the hydraulic oil through the exhaust joint 8, so that the action of the oil cylinder assembly is more rapid and stable. When the brake block needs to be replaced, the oil inlet 20 is in a state without hydraulic oil input, a spare pressure measuring pipeline is connected to the exhaust joint 8, and the hydraulic oil in the cavity between the adjusting piston 1 and the floating type working piston 7 is exhausted by increasing the tension of the spiral tension spring adjusting device 22, so that the gap between the brake block 29 and the brake disc 30 is increased.

The outer circle surface and the right side end surface of the oil cylinder body 6 are provided with threaded through holes as oil inlets, the two oil inlets are communicated with each other, and the two oil inlets are communicated with the working cavity 14. The oil inlet 20 on the right end face is selected according to the requirements of field users, and the other oil inlet can be blocked by an oil plug. A round hole is formed in a boss on the right side of the oil cylinder body 6, a copper sleeve is arranged in the round hole, and the oil cylinder body 6 is connected with the working lever 23 through a pin shaft III 21.

As shown in fig. 2, the adjusting piston 1 and the cylinder body 6 of the present invention are connected to the upper end of the working lever 23 through the pin shaft III21, the spiral tension spring adjusting device 22 is installed between the pin shaft III21 and the pin shaft III21, the number of the spiral tension spring adjusting devices 22 is two, the two spiral tension spring adjusting devices are symmetrically arranged on both sides of the cylinder body 6, the middle portion of the working lever 23 is connected to the supporting rod 25 through the pin shaft II24, so that the two working levers 23 form a lever structure with both ends of the supporting rod 25 as supporting points, the supporting rod 25 is fixedly installed on the caliper frame 26 of the hydraulic disc brake device, the lower portion of the working lever 23 is connected to the caliper body 28 through the pin shaft I27, the brake blocks 29 are installed on the inner sides of the two caliper bodies 28, the caliper body 28 is connected to the brake blocks 29 through the bolt set, the brake disc 30 is installed on the winch drum, the installation needs to make the axis of the brake disc 30 the same as the axis of the caliper frame 26, and the center between the disc surfaces on both sides of the brake disc 30 is made to be the same as the center between the two side surfaces of the caliper frame 26.

The working principle is as follows: when the brake caliper needs to perform a braking action, a driller pulls a working brake handle, hydraulic oil enters a working oil cavity 14 from an oil inlet 20 and pushes a working piston 7 to move leftwards, the working piston 7 moves and is attached to a limiting sleeve 11 arranged in an oil cylinder body 6, and since the opening pressure of the one-way safety valve 15 is set, when the hydraulic oil pressure is greater than a certain value, the hydraulic oil can enter a cavity between the working piston 7 and the adjusting piston 1 through the one-way safety valve 15 and push the adjusting piston 1 to extend out. The cylinder body 6 and the adjusting piston 1 respectively push the working levers 23 at two sides of the cylinder assembly to move outwards, meanwhile, the spiral tension spring adjusting device 22 is stretched to generate a certain tensile force, the working levers 23 push the caliper body 28 to move inwards under the action of the lever principle, and finally, the brake block 29 tightly brakes the brake disc 30 rotating along with the roller to realize the working braking.

When the brake caliper is released, the driller releases the working brake handle, at the moment, the pressure at the oil inlet 20 of the oil cylinder assembly is 0, the adjusting piston 1 is reset under the tension action of the spiral tension spring adjusting device 22, and due to the sealing action of the one-way safety valve 15 on the working piston 7, hydraulic oil in the cavity between the two pistons cannot flow out, and only the working piston 7 can be pushed to move towards the oil inlet at the bottom of the oil cylinder body 6, so that the hydraulic oil in the working oil cavity 14 is discharged back to the oil tank of the hydraulic station. With the gradual abrasion of the brake block 29 and the brake disc 30, only the working piston 7 is reset after the working brake handle releases the brake, the storage amount of hydraulic oil in the cavity between the adjusting piston 1 and the working piston 7 is gradually increased, and the space of the adjusting cavity 5 is gradually reduced, so that the clearance between the brake block 29 and the brake disc 30 is kept at an ideal value (namely the maximum stroke of the working piston 7), and the normally open oil cylinder assembly realizes the function of self-adjusting the clearance.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. The utility model provides a normally open hydro-cylinder of self-interacting clearance, includes hydro-cylinder body (6), and the one end opening part fixed mounting of hydro-cylinder body (6) has hydro-cylinder cap (4), its characterized in that: an adjusting cavity (5) and a working cavity (14) are arranged in the oil cylinder body (6), a limiting sleeve (11) is arranged in the oil cylinder body (6), an inward-protruding limiting table is arranged on one side of the limiting sleeve (11) and is abutted against the inner step surface of the oil cylinder body (6), an adjusting piston (1) is arranged in the limiting sleeve (11) and can do linear reciprocating motion along the limiting sleeve (11), and one end of the adjusting piston (1) extends out of the oil cylinder body (6); floating working piston (7) are installed in working chamber (14) of hydro-cylinder body (6), and oil inlet intercommunication on this working chamber (14) and hydro-cylinder body (6) is provided with one-way relief valve (15) on floating working piston (7), can restrict the passing through of hydraulic oil through one-way relief valve (15).

2. The self-adjusting gap normally open cylinder of claim 1, wherein: the adjusting piston (1) is a T-shaped piston, a through hole is formed in the piston rod of the adjusting piston (1), and the through hole is communicated with an exhaust joint (8) installed on the adjusting piston (1) and used for exhausting air in a cavity between the adjusting piston (1) and the floating type working piston (7).

3. The self-adjusting gap normally open cylinder of claim 2, wherein: an adjusting sleeve (18) is arranged at one end of the adjusting piston (1) close to the floating type working piston (7), and the adjusting sleeve (18) is fixedly connected with the adjusting piston (1) through a fixing bolt (19).

4. The self-adjusting clearance normally open cylinder of claim 3, wherein: a round hole is formed in the left side of a piston rod of the adjusting piston (1), and a copper sleeve is arranged in the round hole.

5. The self-adjusting gap normally open cylinder of claim 1, wherein: the floating type working piston (7) is in a circular plate shape, a through hole is formed in the center of the left side of the floating type working piston (7), the through hole is coaxially communicated with a threaded hole in the center of the right side of the floating type working piston (7), and the one-way safety valve (15) is installed in the threaded hole.

6. The self-adjusting gap normally open cylinder of claim 1, wherein: the oil cylinder cover (4) penetrates through the adjusting piston (1) and is fastened with the oil cylinder body (6) through a bolt and a spring washer, and when the adjusting piston (1) moves along the limiting sleeve (11), the oil cylinder cover (4) can centralize the adjusting piston (1).

7. The self-adjusting gap normally open cylinder of claim 6, wherein: the cylinder cover (4) is provided with a through hole which is communicated with the adjusting cavity (5), and the through hole is provided with a breather (16) which enables the adjusting cavity (5) to be communicated with the outside atmosphere.

8. The self-adjusting gap normally open cylinder of claim 1, wherein: a round hole is arranged on the boss on the right side of the cylinder body (6), and a copper sleeve is arranged in the round hole.

9. The self-adjusting clearance normally open cylinder of claim 1, wherein: the adjusting piston (1), the limiting sleeve (11) and the oil cylinder body (6) are coaxial.

10. The self-adjusting gap normally open cylinder of claim 1, wherein: the cylinder cover (4), the adjusting piston (1) and the floating working piston (7) are all provided with a sealing ring and a guide belt; the limit sleeve (11) is provided with a sealing ring.