CN216518975U

CN216518975U - Hydraulic oil cylinder with built-in displacement sensor

Info

Publication number: CN216518975U
Application number: CN202220058826.3U
Authority: CN
Inventors: 王真; 王世凤
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-01-11
Filing date: 2022-01-11
Publication date: 2022-05-13
Anticipated expiration: 2032-01-11

Abstract

The utility model discloses a hydraulic cylinder with a built-in displacement sensor, which relates to the technical field of hydraulic cylinders and comprises a cylinder body, an end cover and a movable rod, wherein the end cover is fixedly connected with the open end of the cylinder body through a bolt, one end of the movable rod movably penetrates through the middle part of the end cover and is inserted into the inner cavity of the cylinder body, one end of the movable rod is fixedly connected with a first piston matched with the inner cavity of the cylinder body, one side of the first piston is provided with a second piston, the second piston is fixedly sleeved with one end of the movable rod, and one side surface of the end cover is provided with an installation groove. According to the utility model, the sensor body matched with the installation groove is arranged in the inner cavity of the installation groove, and one end of the stay wire on the sensor body is fixedly connected with the second piston, so that the sensor body can monitor the expansion amount of the movable rod in real time, and the sensor body is arranged in the inner cavity of the installation groove, so that the sensor body is not damaged due to exposure outside, and the whole volume of the device is not increased.

Description

Hydraulic oil cylinder with built-in displacement sensor

Technical Field

The utility model relates to the technical field of hydraulic oil cylinders, in particular to a hydraulic oil cylinder with a built-in displacement sensor.

Background

The hydraulic oil cylinder is driven by a power source (a manual hydraulic oil pump and an electric hydraulic oil pump) into the hydraulic oil cylinder, a piston rod of the hydraulic oil cylinder generates linear motion, and the hydraulic oil cylinder is an actuating element and converts hydraulic energy into mechanical energy and is matched with various transmission mechanisms to complete various mechanical motions. When the hydraulic oil cylinder is used, a displacement sensor is required to be installed to monitor the telescopic amount of the hydraulic oil cylinder in real time.

However, at present, current hydraulic cylinder, its displacement sensor generally adopt the exposed formula, be about to displacement sensor integral erection in the hydro-cylinder outside, on the one hand, displacement sensor exposes not the protection outside, and is impaired easily, and secondly, exposed displacement sensor can make the volume grow of whole hydro-cylinder to it installs in little space to be difficult to. Therefore, it is necessary to provide a hydraulic cylinder with a built-in displacement sensor to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a hydraulic cylinder with a built-in displacement sensor, so as to solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme: a hydraulic cylinder with a built-in displacement sensor comprises a cylinder body, an end cover and a movable rod, wherein the end cover is fixedly connected with the open end of the cylinder body through a bolt, one end of the movable rod movably penetrates through the middle part of the end cover and is inserted into the inner cavity of the cylinder body, one end of the movable rod is fixedly connected with a first piston matched with the inner cavity of the cylinder body, a second piston is arranged on one side of the first piston and fixedly sleeved with one end of the movable rod, a mounting groove is arranged on one side surface of the end cover, a sensor body matched with the mounting groove is arranged in the inner cavity of the mounting groove, a threading hole is arranged at the bottom of the mounting groove in a penetrating way, a stay wire on the sensor body penetrates through the threading hole and extends to the inner cavity of the cylinder body to be fixedly connected with the second piston, the open end outside of mounting groove covers there is the protective cover, the protective cover passes through the fixed laminating of a side of screw and end cover and is connected.

Preferably, the other side of the end cover is provided with a guide sleeve, the guide sleeve is positioned in the inner cavity of the opening end of the cylinder body and matched with the inner cavity, and a rubber pad is bonded on the outer side wall of the guide sleeve.

Preferably, the outer side wall of the first piston and the outer side wall of the second piston are both annularly provided with sealing grooves, and sealing rings matched with the sealing grooves are arranged in the sealing grooves.

Preferably, an inner elastic sealing layer and an outer elastic sealing layer are arranged between the first piston and the second piston, the inner elastic sealing layer is located on the inner side of the outer elastic sealing layer, one end of the inner elastic sealing layer and one end of the outer elastic sealing layer are both bonded with the first piston, and the other end of the inner elastic sealing layer and the other end of the outer elastic sealing layer are both bonded with the second piston.

Preferably, an inflation hole is formed in one side face of the second piston in a penetrating mode, and a cavity formed between the inner elastic sealing layer and the outer elastic sealing layer is communicated with an inner cavity of the inflation hole.

Preferably, the inner cavity of the inflation hole is provided with a one-way valve, and an opening at one end of the inflation hole is provided with a dustproof plug matched with the inflation hole.

Preferably, the other end of the outer side wall of the cylinder body is fixedly connected with an oil pipe, an inner cavity of the oil pipe is communicated with an inner cavity of the other end of the cylinder body, and an electromagnetic valve is arranged in the middle of the oil pipe.

The utility model has the technical effects and advantages that:

1. according to the utility model, the mounting groove is formed in one side face of the end cover, the sensor body matched with the mounting groove is arranged in the inner cavity of the mounting groove, one end of the stay wire on the sensor body is fixedly connected with the second piston, and the second piston is fixedly sleeved outside one end of the movable rod, so that the sensor body can monitor the expansion amount of the movable rod in real time, and the sensor body is mounted in the inner cavity of the mounting groove, so that the sensor body is not damaged due to exposure outside, and the whole volume of the device is not increased;

2. according to the utility model, the inner elastic sealing layer and the outer elastic sealing layer are arranged between the first piston and the second piston, the inflation hole is formed in one side surface of the second piston in a penetrating manner, and the one-way valve is arranged in the inner cavity of the inflation hole, so that the outer elastic sealing layer can be expanded outwards and tightly attached to the inner side wall of the cylinder body by inflating the sealed cavity between the inner elastic sealing layer and the outer elastic sealing layer through the inflation hole, and the sealing effect on the inner cavity at the bottom of the cylinder body is effectively improved.

Drawings

Fig. 1 is a perspective view of the overall structure of the present invention.

Fig. 2 is a schematic perspective cross-sectional view of a first piston structure according to the present invention.

Fig. 3 is an exploded view of the end cap structure of the present invention.

Fig. 4 is a perspective view of the end cap structure of the present invention.

In the figure: 1. a cylinder body; 2. an end cap; 3. a movable rod; 4. a first piston; 5. a second piston; 6. mounting grooves; 7. a sensor body; 8. threading holes; 9. a protective cover; 10. a guide sleeve; 11. a rubber pad; 12. a seal ring; 13. an inner elastomeric sealing layer; 14. an outer elastomeric sealing layer; 15. an inflation hole; 16. a one-way valve; 17. a dust plug; 18. an oil pipe; 19. an electromagnetic valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The utility model provides a hydraulic cylinder with a built-in displacement sensor as shown in figures 1-4, which comprises a cylinder body 1, an end cover 2 and a movable rod 3, wherein the end cover 2 is fixedly connected with the open end of the cylinder body 1 through a bolt, one end of the movable rod 3 movably penetrates through the middle part of the end cover 2 and is inserted into the inner cavity of the cylinder body 1, the movable rod 3 can stretch and retract, one end of the movable rod 3 is fixedly connected with a first piston 4 matched with the inner cavity of the cylinder body 1, one side of the first piston 4 is provided with a second piston 5, the second piston 5 is fixedly sleeved with one end of the movable rod 3, the arrangement of the first piston 4 and the second piston 5 forms a seal with the inner cavity at the bottom of the cylinder body 1, when the inner cavity at the bottom of the cylinder body 1 is filled with hydraulic oil, the pressure of the inner cavity at the bottom of the cylinder body 1 is increased, the first piston 4 and the second piston 5 are enabled to move, and further drive the movable rod 3 to extend, on the contrary, after the hydraulic oil at the bottom of the cylinder body 1 is pumped away, the pressure of the inner cavity at the bottom of the cylinder body 1 is reduced, and the first piston 4 and the second piston 5 slide reversely and drive the movable rod 3 to contract.

Secondly, mounting groove 6 has been seted up at one side of end cover 2, the inner chamber of mounting groove 6 is provided with the sensor body 7 of looks adaptation with it, the model of sensor body 7 is BK-L0300 displacement sensor that acts as go-between, the tank bottom of mounting groove 6 runs through and has seted up through wires hole 8, act as go-between on the sensor body 7 runs through wires hole 8 and extends to the inner chamber and the second piston 5 fixed connection of cylinder body 1, consequently, second piston 5 is at the slip in-process, sensor body 7 can carry out real-time measurement to the interval between end cover 2 and the second piston 5, and then can carry out real-time supervision to the flexible volume of movable rod 3, the open end outside of mounting groove 6 covers has protective cover 9, protective cover 9 passes through the fixed laminating of screw and end cover 2 and is connected.

Further, another side at end cover 2 is provided with uide bushing 10, and uide bushing 10 is located the open end inner chamber of cylinder body 1 and looks adaptation with it, and the setting of uide bushing 10 is used for leading the flexible of movable rod 3 to avoid movable rod 3 to take place the slope, and the lateral wall of uide bushing 10 bonds there is rubber pad 11, and the setting of rubber pad 11 can reduce the extrusion force that produces between uide bushing 10 and the 1 inside wall of cylinder body.

And, the equal annular seal groove of having seted up of lateral wall at first piston 4 and the lateral wall of second piston 5, and be provided with sealing washer 12 with its looks adaptation in the seal groove, the setting of sealing washer 12 is used for improving the leakproofness between first piston 4 and the cylinder body 1 inside wall and the leakproofness between second piston 5 and the cylinder body 1 inside wall.

Furthermore, an inner elastic sealing layer 13 and an outer elastic sealing layer 14 are arranged between the first piston 4 and the second piston 5, the inner elastic sealing layer 13 is positioned at the inner side of the outer elastic sealing layer 14, one end of the inner elastic sealing layer 13 and one end of the outer elastic sealing layer 14 are both bonded with the first piston 4, the other end of the inner elastic sealing layer 13 and the other end of the outer elastic sealing layer 14 are both bonded with the second piston 5, therefore, a sealed cavity can be formed between the inner elastic sealing layer 13 and the outer elastic sealing layer 14, one side surface of the second piston 5 is provided with an inflation hole 15 in a penetrating way, the cavity formed between the inner elastic sealing layer 13 and the outer elastic sealing layer 14 is communicated with the inner cavity of the inflation hole 15, the sealed cavity between the inner elastic sealing layer 13 and the outer elastic sealing layer 14 is inflated through the inflation hole 15, and the outer elastic sealing layer 14 can expand outwards and is tightly attached to the inner side wall of the cylinder body 1, thereby improve the sealed effect to cylinder body 1 bottom inner chamber, the inner chamber of inflation hole 15 is provided with check valve 16, and the setting of check valve 16 can avoid the gas that fills between interior elastic seal layer 13 and the outer elastic seal layer 14 to take place to reveal from inflation hole 15, and the one end opening part of inflation hole 15 is provided with the dust plug 17 of looks adaptation with it, and the setting of dust plug 17 is used for avoiding dust or impurity to carry out the inner chamber of inflation hole 15 and leads to its jam.

Secondly, at the other end fixedly connected with oil pipe 18 of cylinder body 1 lateral wall, and the inner chamber of oil pipe 18 and the other end inner chamber intercommunication of cylinder body 1, oil pipe 18 sets up and is used for filling hydraulic oil to the bottom inner chamber of cylinder body 1, perhaps takes away the hydraulic oil of cylinder body 1 bottom inner chamber, and oil pipe 18's middle part is provided with solenoid valve 19, and solenoid valve 19's setting is used for avoiding the hydraulic oil of cylinder body 1 bottom inner chamber to reveal.

The working principle of the utility model is as follows:

when the device is used, hydraulic oil is filled into the inner cavity at the bottom of the cylinder body 1 through the oil pipe 18, the pressure of the inner cavity at the bottom of the cylinder body 1 is increased, the first piston 4 and the second piston 5 move under the action of oil pressure and drive the movable rod 3 to extend, otherwise, the hydraulic oil in the inner cavity at the bottom of the cylinder body 1 is pumped away through the oil pipe 18, and the first piston 4 and the second piston 5 can drive the movable rod 3 to contract under the action of negative pressure;

because sensor body 7 fixed mounting is inside end cover 2, and sensor body 7 is connected with second piston 5 through acting as go-between, therefore second piston 5 is when sliding, and sensor body 7 can carry out real-time measurement to the interval between end cover 2 and the second piston 5, and then can carry out real-time supervision to the flexible volume of movable rod 3.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.

Claims

1. The utility model provides a hydraulic cylinder with built-in displacement sensor, includes cylinder body (1), end cover (2) and movable rod (3), its characterized in that: the end cover (2) is fixedly connected with the opening end of the cylinder body (1) through a bolt, one end of the movable rod (3) is movably connected with the middle of the end cover (2) and inserted into the inner cavity of the cylinder body (1), one end of the movable rod (3) is fixedly connected with a first piston (4) matched with the inner cavity of the cylinder body (1), one side of the first piston (4) is provided with a second piston (5), the second piston (5) is fixedly sleeved with one end of the movable rod (3), one side face of the end cover (2) is provided with a mounting groove (6), the inner cavity of the mounting groove (6) is provided with a sensor body (7) matched with the mounting groove, the groove bottom of the mounting groove (6) is provided with a threading hole (8) in a penetrating manner, a threading wire on the sensor body (7) penetrates through the threading hole (8) and extends to the inner cavity of the cylinder body (1) and is fixedly connected with the second piston (5), the open end outside of mounting groove (6) covers has protective cover (9), protective cover (9) are connected through the fixed laminating of a side of screw and end cover (2).

2. The hydraulic cylinder with the built-in displacement sensor as claimed in claim 1, wherein: the other side of end cover (2) is provided with uide bushing (10), uide bushing (10) are located the open end inner chamber of cylinder body (1) and are mutually supported, rubber pad (11) are bonded to the lateral wall of uide bushing (10).

3. The hydraulic cylinder with the built-in displacement sensor as claimed in claim 2, wherein: the sealing groove is annularly formed in the outer side wall of the first piston (4) and the outer side wall of the second piston (5), and a sealing ring (12) matched with the sealing groove is arranged in the sealing groove.

4. The hydraulic cylinder with the built-in displacement sensor as claimed in claim 3, wherein: be provided with interior elasticity sealing layer (13) and outer elasticity sealing layer (14) between first piston (4) and second piston (5), and interior elasticity sealing layer (13) are located the inboard of outer elasticity sealing layer (14), the one end of interior elasticity sealing layer (13) and the one end of outer elasticity sealing layer (14) all bond with first piston (4), the other end of interior elasticity sealing layer (13) and the other end of outer elasticity sealing layer (14) all bond with second piston (5).

5. The hydraulic cylinder with the built-in displacement sensor as claimed in claim 4, wherein: an inflation hole (15) penetrates through one side face of the second piston (5), and a cavity formed between the inner elastic sealing layer (13) and the outer elastic sealing layer (14) is communicated with an inner cavity of the inflation hole (15).

6. The hydraulic cylinder with the built-in displacement sensor as claimed in claim 5, wherein: the inner cavity of the inflation hole (15) is provided with a one-way valve (16), and an opening at one end of the inflation hole (15) is provided with a dustproof plug (17) matched with the inflation hole.

7. The hydraulic cylinder with the built-in displacement sensor as claimed in claim 6, wherein: the oil pipe (18) is fixedly connected to the other end of the outer side wall of the cylinder body (1), the inner cavity of the oil pipe (18) is communicated with the inner cavity of the other end of the cylinder body (1), and the electromagnetic valve (19) is arranged in the middle of the oil pipe (18).