CN116336033A

CN116336033A - Oil cylinder

Info

Publication number: CN116336033A
Application number: CN202310351479.2A
Authority: CN
Inventors: 唐新望; 高益红
Original assignee: Shanxi Xinwang New Technology Co ltd
Current assignee: Shanxi Xinwang New Technology Co ltd
Priority date: 2023-04-04
Filing date: 2023-04-04
Publication date: 2023-06-27

Abstract

The invention belongs to the technical field of hydraulic pressure, and discloses an oil cylinder. The oil cylinder comprises a main cylinder body, a main piston rod, a guide sleeve and a cleaning brush; the main cylinder body is provided with a main inlet and a main outlet, and the main piston is positioned in the main cylinder body and can reciprocate; one end of the main piston rod is connected with the main piston, and the other end of the main piston rod penetrates through the guide sleeve to extend out of the main cylinder body; the guide sleeve is connected to the main cylinder body; the cleaning brush is sleeved outside the main piston rod and is in sliding contact with the outer surface of the main piston rod, and the cleaning brush can rotate relative to the main piston rod. The oil cylinder can clean and scrub impurities attached to the main piston rod by utilizing the cleaning brush, so that the impurities are prevented from contacting with the sealing element, the sealing element is protected, and the service life of the oil cylinder is prolonged.

Description

Oil cylinder

Technical Field

The invention belongs to the technical field of hydraulic pressure, and particularly relates to an oil cylinder with a self-locking function.

Background

The cylinder is a hydraulic cylinder, which is a linear motion type actuating element with output force being proportional to the effective area of the piston and the pressure difference between two sides of the piston, and has the function of converting hydraulic energy into mechanical energy. The input of the hydraulic cylinder is the flow and pressure of the fluid, and the output is the linear motion speed and force. The oil cylinder has the characteristics of simple structure, long service life and the like, so that the oil cylinder has wide application in the field of engineering machinery.

However, the cylinder used at present still has the following problems:

1. when the oil cylinder is used on engineering mechanical equipment, due to the fact that the working environment of the engineering mechanical equipment is severe, more impurities are adsorbed on the piston rod when the piston rod of the oil cylinder stretches, so that the impurities can move along with the piston rod in the process of shrinkage of the piston rod, the impurities are blocked outside the oil cylinder by the sealing piece in the guide sleeve, the sealing piece is damaged due to accumulation of the impurities, the oil cylinder leaks, and the service life of the oil cylinder is influenced;

2. the oil cylinder is used as an executing element and always works under load when in operation, and because working conditions of engineering mechanical equipment are various, when the oil cylinder works, the load angle and the load size of the oil cylinder are changed along with the change of the working angle, the force born by the oil cylinder is not only along the direction of a piston rod, but also the piston rod is subjected to radial component force, and the larger the extension moment arm of the oil cylinder is, the larger the influence of the radial force on the piston rod is, the piston rod is bent when serious, so that the oil cylinder is damaged;

3. when the conventional oil cylinder is used, the stroke of the oil cylinder is the moving distance of the piston in the cylinder barrel, so that the stroke of the oil cylinder cannot be limited rapidly, and the applicability of the oil cylinder is reduced.

Disclosure of Invention

In view of the above, the present invention proposes an oil cylinder to overcome or at least partially solve the above-mentioned problems.

The oil cylinder comprises a main cylinder body, a main piston rod, a guide sleeve and a cleaning brush; the main cylinder body is provided with a main inlet and a main outlet, and the main piston is positioned in the main cylinder body and can move back and forth; one end of the main piston rod is connected with the main piston, and the other end of the main piston rod penetrates through the guide sleeve to extend out of the main cylinder body; the guide sleeve is connected to the main cylinder body; the cleaning brush is sleeved outside the main piston rod and is in sliding contact with the outer surface of the main piston rod, and the cleaning brush can rotate back and forth relative to the main piston rod.

Preferably, the oil cylinder further comprises a connecting cap; the connecting cap is rotationally connected to one end of the main piston rod extending out of the main cylinder body; the connecting cap is in fit contact with the main piston rod along the axial direction of the main piston rod; and a gap is arranged between the connecting cap and the main piston rod along the radial direction of the main piston rod.

Preferably, the oil cylinder further comprises a sliding plate, a rack, a first gear, a second gear, a third gear and a rotating ring; the sliding plate is connected with the connecting cap along the axial direction of the main piston rod, the rack is arranged on the sliding plate along the axial direction of the main piston rod, the first gear and the second gear are coaxially arranged and rotationally connected on the guide sleeve, the first gear is in meshed connection with the rack, the second gear is in meshed connection with the third gear, the third gear is in coaxial fixed connection with the rotating ring, the rotating ring is sleeved outside the main piston rod and rotationally connected with the guide sleeve, and the cleaning brush is connected on the rotating ring.

Preferably, the sliding plate is provided with a plurality of positioning holes for penetrating through the positioning pieces so as to limit the moving distance of the sliding plate relative to the guide sleeve.

Preferably, the positioning hole adopts a threaded hole.

Preferably, the oil cylinder further comprises a supporting cylinder body, a supporting piston and a supporting piston rod; the support cylinder body is rotationally connected with the main cylinder body and can move back and forth relative to the radial direction of the main cylinder body, and a support inlet and a support outlet are arranged on the support cylinder body; the support piston is positioned in the support cylinder body and can reciprocate; one end of the supporting piston rod is connected with the supporting piston, and the other end of the supporting piston rod extends out of the supporting cylinder body and is rotationally connected with the connecting cap.

Preferably, the oil cylinder comprises a corner slide block; the corner sliding block is connected with the guide sleeve in a sliding manner along the radial direction of the main piston; the support cylinder body passes through the corner sliding block and is rotationally connected with the corner sliding block.

Preferably, the oil cylinder comprises a threaded gear, a screw rod and a guide rod; the screw is in threaded connection with the screw gear, and the end part of the screw is connected with the corner sliding block; the guide rod is parallel to the screw rod, one end of the guide rod is connected with the corner sliding block, and the other end of the guide rod is in sliding connection with the guide sleeve.

Preferably, the oil cylinder comprises a fourth gear and a fifth gear; the fourth gear is in meshed connection with the third gear, the fifth gear is coaxially connected with the fourth gear, and the threaded gear is in meshed connection with the fifth gear.

Preferably, the main inlet communicates with the support inlet and the main outlet communicates with the support outlet.

Compared with the oil cylinder in the existing structural form, the oil cylinder has the following beneficial technical effects:

1. according to the invention, the sliding plate which moves along with the main piston rod is arranged, the rack is arranged on the sliding plate, and the rotatable cleaning brush is arranged on the guide sleeve, so that when the main piston rod stretches, the sliding plate is driven to move and match with the rack and the gear, and the cleaning brush is driven to rotate, and impurities attached to the main piston rod can be brushed down by the cleaning brush, so that the impurities are prevented from contacting with the sealing element, the sealing element is protected, and the service life of the oil cylinder is prolonged.

2. According to the invention, the connecting cap is arranged, and the connecting cap and the main piston rod are connected together through rotation, so that the main piston rod can drive the connecting cap to move along the direction of the main piston rod, and radial force borne by the connecting cap can not be directly transmitted to the main piston rod due to the gap between the connecting cap and the main piston rod, thereby protecting the main piston rod and preventing the main piston rod from bending.

3. According to the invention, the supporting piston rod and the corner sliding block are arranged, the screw rod is arranged on the corner sliding block and matched with the nut gear, so that when the oil cylinder stretches out, the sliding plate is driven to move along with the main piston rod, the nut gear is driven to rotate through gear transmission, the screw rod is driven to drive the corner sliding block to move, the supporting piston rod, the guide sleeve and the sliding plate form a triangular structure, the connecting cap is supported, and when the connecting cap is subjected to radial force, the supporting cylinder body is rotationally connected on the corner sliding block, and along with the stretching of the main piston rod, the corner sliding block drives the supporting cylinder body to move, so that the included angle formed by the supporting piston rod and the main piston rod is larger, the supporting piston rod can better support the radial force, and the main piston rod is protected.

4. According to the invention, the plurality of threaded holes are formed in the sliding plate, and the extending distance of the sliding plate can be controlled by means of the screws arranged in the threaded holes, so that the stroke of the oil cylinder is controlled, the stroke control of the oil cylinder is simple and quick, and the applicability of the oil cylinder is improved.

Drawings

FIG. 1 is a schematic cross-sectional view of an oil cylinder according to the present embodiment;

FIG. 2 is a schematic view of the cross-sectional structure in the direction A-A in FIG. 1;

FIG. 3 is an enlarged schematic view of a portion of the portion I in FIG. 1;

FIG. 4 is a schematic view showing a cross-sectional structure in the direction B-B in FIG. 3;

FIG. 5 is a schematic view of the cross-sectional structure in the direction C-C in FIG. 3;

fig. 6 is a schematic view of a cross-sectional structure in the direction D-D in fig. 3.

Detailed Description

The technical scheme of the invention is further described in detail below with reference to the accompanying drawings and the examples.

As shown in fig. 1 to 6, the oil cylinder of the present embodiment includes a main cylinder body 1, a main piston 2, a main piston rod 3, a guide bush 4, and a cleaning brush 5. The main cylinder 1 is provided with a main inlet 6 and a main outlet 7, and the main piston 2 is positioned in the main cylinder 1 and can move back and forth between the main inlet 6 and the main outlet 7. One end of the main piston rod 3 is connected with the main piston 2, and the other end passes through the guide sleeve 4 and extends out of the main cylinder body 1. The guide sleeve 4 is connected to the main cylinder 1. The cleaning brush 5 is fitted over the outside of the main piston rod 3 and is in sliding contact with the outer surface of the main piston rod 3, and is rotatable back and forth with respect to the main piston rod 3.

At this time, through the reciprocal rotation of drive cleaning brush for the main piston rod, just can clean the scrubbing to the main piston rod for the impurity that adheres to on the piston rod can be brushed down by the cleaning brush, prevents impurity and sealing member contact, protection sealing member, extension hydro-cylinder's life.

As shown in fig. 1 to 3, in the cylinder of the present embodiment, a connecting cap 8 is further provided. The connecting cap 8 is rotatably connected to one end of the main piston rod 3 extending out of the main cylinder 1 for connecting to an external load. Wherein, along the axial direction of the main piston rod 3, the connecting cap 8 and the main piston rod 3 form fit contact; in the radial direction of the main piston rod 3, a gap is arranged between the connecting cap 8 and the main piston rod 3.

At this time, through setting up the connecting cap, connecting cap and main piston rod link together through rotating for the main piston rod can drive the axial displacement of connecting cap along main piston rod, simultaneously owing to there is the clearance between connecting cap and the piston rod, makes the radial force that the connecting cap received can not directly transmit on the main piston rod, and then protection main piston rod prevents that the main piston rod from buckling.

As shown in fig. 1 and 3, in the cylinder of the present embodiment, a slide plate 9, a rack 10, a first gear 11, a second gear 12, a third gear 13, and a rotary ring 14 are further included. Wherein, slide plate 9 is connected with connecting cap 8 along the axial of main piston rod 3, rack 10 sets up on slide plate 9 along the axial of main piston rod 3, first gear 11 and second gear 12 coaxial setting and rotate and connect on uide bushing 4, first gear 11 and rack 10 meshing are connected, second gear 12 and third gear 13 meshing are connected, third gear 13 and rotatory ring 14 coaxial fixed connection, and rotatory ring 14 then the cover is established in the outside of main piston rod 3 and is rotated with uide bushing 4 and be connected, cleaning brush 5 is connected on rotatory ring 14.

At this moment, in the process that the main piston rod drives the connecting sleeve to reciprocate, the connecting sleeve can drive the sliding plate to synchronously move, so that the rack drives the first gear to reciprocate, and then the second gear and the third gear drive the rotating ring to drive the cleaning brush to reciprocate, and the cleaning operation of the cleaning brush on the main piston rod is realized.

As shown in fig. 3 and 6, a plurality of positioning holes 15 are provided in the sliding plate 9 of the present embodiment for penetrating positioning members to limit the moving distance of the sliding plate 9 relative to the guide bush 4. In this embodiment, the positioning hole adopts a threaded hole, and by inserting screws into the positioning holes at different positions, the continuous extension of the main piston rod can be limited by means of the abutment formed by the screws and the guide sleeve in the process that the connecting sleeve drives the sliding plate to move, so that the stroke control of the oil cylinder is achieved.

As shown in fig. 1 and 3, in the cylinder of the present embodiment, there are further provided a support cylinder 16, a support piston 17, and a support piston rod 18. The support cylinder 16 is rotatably connected to the main cylinder 1 and can reciprocate in the radial direction with respect to the main cylinder 1. The support cylinder 16 is provided with a support inlet 19 and a support outlet 20. The support piston 17 is located inside the support cylinder 16 and is capable of reciprocating between a support inlet 19 and a support outlet 20. One end of the support piston rod 18 is connected with the support piston 17, and the other end extends out of the support cylinder 16 through the support guide sleeve 27 to be rotatably connected with the connection cap 8.

At this time, by setting the support piston rod rotatably connected with the connecting cap and setting the support piston rod in the support cylinder rotatably connected with the main cylinder, the support piston rod can be made to extend synchronously while the connecting cap is extended, and by controlling the rotation of the support piston rod relative to the main cylinder, a triangle structure can be formed between the support piston rod, the guide sleeve and the sliding plate to support the connecting cap, thereby supporting the radial force and protecting the main piston rod.

As shown in fig. 1, 3 and 4, the cylinder of the present embodiment further includes a corner slider 21. The corner slide block 21 is slidingly connected with the guide sleeve 4 along the radial direction of the main piston 2. The support cylinder 16 passes through the corner slider 21 and is rotatably connected to the corner slider 21.

At this time, through the reciprocating motion of drive control corner slider for the uide bushing, just can drive the support cylinder body and rotate and change the contained angle between its and the main piston rod to provide better radial holding power to the main piston rod.

As shown in fig. 3 and 4, the cylinder in this embodiment further includes a screw gear 22, a screw 23, and a guide bar 24. The threaded gear 22 is rotatably connected to the guide sleeve 4, the threaded rod 23 is screwed to the threaded gear 22, and its end is connected to the corner slide 21. The guide rod 24 is arranged in parallel with the screw rod 23, one end of the guide rod is connected with the corner sliding block 21, and the other end of the guide rod is in linear sliding connection with the guide sleeve 4.

At the moment, the screw rod and the guide rod can drive the corner sliding block to reciprocate relative to the guide sleeve by driving and controlling the reciprocating rotation of the threaded gear, so that the included angle between the supporting piston rod and the main piston rod is changed.

Further, as shown in fig. 3 and 4, in the cylinder of the present embodiment, a fourth gear 25 and a fifth gear 26 are also provided. The fourth gear 25 is meshed with the third gear 13, the fifth gear 26 is coaxially connected with the fourth gear 25, and the screw gear 22 is meshed with the fifth gear 26. At this time, in the process of stretching and contracting the main piston rod, the threaded gear can be driven to reciprocate, so that the inclination angle of the supporting piston rod is automatically changed, and automatic adjustment is realized.

As shown in fig. 1 to 6, when the cylinder of the present embodiment is used, the main inlet 6 is communicated with the support inlet 19, and the main outlet 7 is communicated with the support outlet 20, and the specific operation is as follows:

when the main piston rod 3 needs to be controlled in extension, high-pressure oil is introduced into the main inlet 6 and the support inlet 19, and the main outlet 7 and the support outlet 20 are communicated with oil return so as to drive the main piston 2 and the support piston 17 to move and drive the main piston rod 3 and the support piston rod 18 to extend respectively. The main piston rod 3 drives the connecting cap 8 to move together, so that the connecting cap 8 bears an axial force formed by an external load, meanwhile, due to the movement of the connecting cap 8, the sliding plate 9 is driven to synchronously move, the rack 10 drives the first gear 11 to rotate, the second gear 12 drives the third gear 13 to rotate, and the third gear 13 drives the rotating ring 14 and the fourth gear 25 to rotate respectively. The rotating ring 14 then drives the cleaning brush 5 to rotate relative to the main piston rod 3, thereby cleaning the surface of the main piston rod 3. The fourth gear 25 drives the fifth gear 26 to rotate, and then drives the threaded gear 22 to drive the screw 23 to rotate, and the corner sliding block 21 is driven to move relative to the guide sleeve 4 under the guide of the guide rod 24, so that an included angle is formed between the supporting piston rod 18 and the main piston rod 3, and as the extending distance of the main piston rod 3 increases, the greater the moving distance of the corner sliding block 21 relative to the guide sleeve 4, the greater the included angle between the supporting piston rod 18 and the main piston rod 3 is, and a triangular structure is formed among the supporting piston rod 18, the guide sleeve 4 and the sliding plate 9 so as to bear the radial force transmitted on the connecting cap 8, and protect the main piston rod 3.

In the process, by inserting the positioning piece into the positioning hole 15, the abutting formed between the positioning piece and the guide sleeve 4 in the process of moving along with the connecting cap 8 by the sliding plate 9 can limit the continuous extension of the main piston rod 3, thereby controlling the stroke of the oil cylinder.

When the main piston rod 3 needs to be contracted and controlled, high-pressure oil is introduced into the main outlet 7 and the support outlet 20, and the main inlet 6 and the support inlet 19 are communicated with oil return so as to drive the main piston 2 and the support piston 17 to move reversely and respectively drive the main piston rod 3 and the support piston rod 18 to be contracted. In this process, the rack 10 moves reversely along with the sliding plate 9 to drive the first gear 11 to rotate reversely, and the cleaning brush 5 is continuously driven to rotate relative to the main piston rod 3 through the second gear 12, the third gear 13 and the rotating ring 14 to perform cleaning operation on the main piston rod 3. At the same time, the first gear 11 rotates reversely, the second gear 12, the third gear 13, the fourth gear 25 and the fifth gear 26 drive the threaded gear 22 to rotate reversely, the screw 23 drives the corner sliding block 21 to move reversely to reset, and after the main piston rod 3 and the supporting piston rod 18 are completely retracted, the retraction of the oil cylinder is completed.

Claims

1. An oil cylinder is characterized by comprising a main cylinder body, a main piston rod, a guide sleeve and a cleaning brush; the main cylinder body is provided with a main inlet and a main outlet, and the main piston is positioned in the main cylinder body and can reciprocate; one end of the main piston rod is connected with the main piston, and the other end of the main piston rod penetrates through the guide sleeve to extend out of the main cylinder body; the guide sleeve is connected to the main cylinder body; the cleaning brush is sleeved outside the main piston rod and is in sliding contact with the outer surface of the main piston rod, and the cleaning brush can rotate relative to the main piston rod.

2. The cylinder of claim 1, further comprising a connecting cap; the connecting cap is rotationally connected to one end of the main piston rod extending out of the main cylinder body; the connecting cap is in fit contact with the main piston rod along the axial direction of the main piston rod; and a gap is arranged between the connecting cap and the main piston rod along the radial direction of the main piston rod.

3. The ram of claim 2, further comprising a slide plate, a rack, a first gear, a second gear, a third gear, and a rotating ring; the sliding plate is connected with the connecting cap along the axial direction of the main piston rod, the rack is arranged on the sliding plate along the axial direction of the main piston rod, the first gear and the second gear are coaxially arranged and rotationally connected on the guide sleeve, the first gear is in meshed connection with the rack, the second gear is in meshed connection with the third gear, the third gear is in coaxial fixed connection with the rotating ring, the rotating ring is sleeved outside the main piston rod and rotationally connected with the guide sleeve, and the cleaning brush is connected on the rotating ring.

4. The cylinder as set forth in claim 3, wherein the sliding plate is provided with a plurality of positioning holes for penetrating a positioning member to limit a moving distance of the sliding plate with respect to the guide sleeve.

5. The cylinder as set forth in claim 4, wherein said positioning hole is a threaded hole.

6. A cylinder according to claim 3, further comprising a support cylinder, a support piston and a support piston rod; the support cylinder body is rotationally connected with the main cylinder body and can move back and forth relative to the radial direction of the main cylinder body, and a support inlet and a support outlet are arranged on the support cylinder body; the support piston is positioned in the support cylinder body and can reciprocate; one end of the supporting piston rod is connected with the supporting piston, and the other end of the supporting piston rod extends out of the supporting cylinder body and is rotationally connected with the connecting cap.

7. The cylinder of claim 6, wherein the cylinder includes a corner slide; the corner sliding block is connected with the guide sleeve in a sliding manner along the radial direction of the main piston; the support cylinder body passes through the corner sliding block and is rotationally connected with the corner sliding block.

8. The cylinder of claim 7, wherein the cylinder comprises a threaded gear, a screw, and a guide rod; the screw is in threaded connection with the screw gear, and the end part of the screw is connected with the corner sliding block; the guide rod is parallel to the screw rod, one end of the guide rod is connected with the corner sliding block, and the other end of the guide rod is in sliding connection with the guide sleeve.

9. The cylinder of claim 8, wherein the cylinder includes a fourth gear and a fifth gear; the fourth gear is in meshed connection with the third gear, the fifth gear is coaxially connected with the fourth gear, and the threaded gear is in meshed connection with the fifth gear.

10. The cylinder of claim 6, wherein the main inlet communicates with the support inlet and the main outlet communicates with the support outlet.