CN217080970U

CN217080970U - Gas injection type stroke detection oil cylinder

Info

Publication number: CN217080970U
Application number: CN202220947818.4U
Authority: CN
Inventors: 李传飞
Original assignee: Beidefu Mechanics And Technology Changzhou Co ltd
Current assignee: Beidefu Mechanics And Technology Changzhou Co ltd
Priority date: 2022-04-22
Filing date: 2022-04-22
Publication date: 2022-07-29
Anticipated expiration: 2032-04-22

Abstract

The utility model relates to a hydro-cylinder technical field especially relates to a gas injection formula area stroke detection hydro-cylinder, include: the bottom of the cylinder barrel is provided with a rotary oil inlet assembly and a stroke detection assembly; the rotary oil inlet assembly comprises a fixed disc fixed at the bottom of the cylinder barrel and an oil inlet seat sleeved on the fixed disc in a rotating mode, the stroke detection assembly comprises a detection ring and a sensing assembly, the detection ring is sleeved on the oil inlet seat, a plurality of detection guide rods arranged along the circumferential direction penetrate through a flange of the fixed disc and are fixedly connected with the piston rod, the sensing assembly is installed on the oil inlet seat and comprises two proximity switches and a detection ring used for detecting synchronous movement with the piston rod. The utility model discloses a setting of detection circle has avoided the piston rod to rotate under the effect of receiving radial force and has leaded to the detected signal inefficacy, can carry out real-time detection to the stroke of piston rod, improves the convenience to the hydro-cylinder control to the detection circle is connected with the piston rod through detecting the guide arm, and simple structure is compact, has guaranteed the accuracy that the piston rod stroke top and end position detected.

Description

Gas injection type stroke detection oil cylinder

Technical Field

The utility model relates to a hydro-cylinder technical field especially relates to a gas injection formula area stroke detects hydro-cylinder.

Background

The hydraulic oil cylinder is a hydraulic actuating element which converts hydraulic energy into mechanical energy and realizes linear reciprocating motion (or swinging motion). The reciprocating motion device has simple structure and reliable work, can avoid a speed reducer when the reciprocating motion is realized, has no transmission clearance, and moves stably, thereby being widely applied to hydraulic systems of various machines. Certain specific applications require that the hydraulic cylinder be capable of stroke sensing for controlling the working stroke of the hydraulic cylinder.

In the hydraulic cylinder with the stroke detection function in the prior art, the guide rod is arranged between the mandrel and the piston rod at the bottom of the cylinder, and the proximity switches at different positions are triggered through the guide rod to detect the stroke starting and ending positions of the hydraulic cylinder. The mounting structure of the detection device is only suitable for detecting the stroke of the oil cylinder, and has no solution for the failure of detection signals caused by the rotation of the piston rod under the action of radial force.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is known to a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the utility model provides a gas injection formula area stroke detects hydro-cylinder, solves the piston rod and rotates under the effect of receiving the radial force and lead to the problem of detected signal distortion.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a gas injection type stroke detection oil cylinder comprises: the stroke detection device comprises a cylinder barrel and a piston rod movably arranged in the cylinder barrel, wherein a rotary oil inlet assembly and a stroke detection assembly are arranged at the bottom of the cylinder barrel;

the rotary oil inlet assembly comprises a fixed disc fixed to the bottom of the cylinder barrel and an oil inlet seat arranged on the fixed disc in a rotating mode, the stroke detection assembly comprises a detection ring and a sensing assembly, the detection ring is sleeved on the oil inlet seat, a plurality of detection guide rods arranged along the circumferential direction penetrate through a flange of the fixed disc and fixedly connected with the piston rod, the sensing assembly is installed on the oil inlet seat and comprises two proximity switches, and the detection ring is used for detecting the synchronous motion of the piston rod.

Furthermore, a separation blade is arranged on the connecting surface of the piston rod and the detection guide rod, the end part of the detection guide rod is embedded into the piston rod, a clamping groove is formed in the position corresponding to the separation blade, and the separation blade is embedded into the clamping groove.

Furthermore, the oil inlet seat comprises an oil inlet shell and a rear cover, the detection ring is sleeved on the oil inlet shell, the induction assembly is arranged on the rear cover, and the diameter of the rear cover is larger than that of the oil inlet shell.

Furthermore, a gap exists between the inner hole of the detection ring and the outer circular surface of the oil inlet shell.

Furthermore, a gap exists between the oil inlet shell and the flange end face of the fixed disc.

Furthermore, the induction assembly also comprises an induction bracket which comprises a cushion block fixed on the rear cover and an installation plate arranged on the cushion block;

the mounting plate is provided with a first mounting surface and a second mounting surface, adjusting plates are arranged on the first mounting surface and the second mounting surface, and the two proximity switches are arranged on the adjusting plates on the first mounting surface and the second mounting surface respectively.

Furthermore, a sealing ring is arranged on an outer cylindrical surface of the detection guide rod, which is in contact with the fixed disk.

Furthermore, one side of the fixed disc, which faces the cylinder barrel, is provided with a step shaft, the step shaft extends into the inner hole of the piston rod, and the inner hole of the piston rod is provided with a sealing ring.

Further, the center of the fixed disk is provided with a gas injection hole along the axial direction.

Further, the rear cover is provided with a gas injection nozzle, and the gas injection nozzle is communicated with the gas injection hole.

The utility model has the advantages that: the utility model discloses a setting of detection circle has avoided the piston rod to rotate under the effect of receiving radial force and has leaded to the detected signal inefficacy, can effectively carry out real-time detection to the stroke of piston rod, improves the convenience to the hydro-cylinder control to the detection circle is connected with the piston rod through detecting the guide arm, and simple structure is compact, has guaranteed the accuracy that the piston rod stroke top and end position detected.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of a gas injection type cylinder with stroke detection in an embodiment of the present invention;

FIG. 2 is a schematic view of the internal structure of the cylinder barrel in the embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2;

FIG. 4 is a schematic sectional view of the gas injection type cylinder with stroke detection in the embodiment of the present invention;

fig. 5 is an installation diagram of the detection guide rod in the embodiment of the present invention.

Reference numerals: 10. a cylinder barrel; 20. a piston rod; 30. fixing the disc; 31. a step shaft; 32. a gas injection hole; 40. an oil inlet seat; 41. an oil inlet shell; 42. a rear cover; 50. detecting the ring; 60. an inductive component; 61. a proximity switch; 62. an induction support; 621. cushion blocks; 622. mounting a plate; 70. detecting a guide rod; 71. a card slot; 80. a baffle plate; 90. and (5) sealing rings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The gas injection type oil cylinder with the stroke detection function shown in fig. 1 to 5 comprises a cylinder barrel 10 and a piston rod 20 movably arranged in the cylinder barrel 10, wherein a rotary oil inlet assembly and a stroke detection assembly are arranged at the bottom of the cylinder barrel 10; the rotary oil inlet assembly comprises a fixed disc 30 fixed at the bottom of the cylinder barrel 10 and an oil inlet seat 40 rotatably sleeved on the fixed disc 30, the stroke detection assembly comprises a detection ring 50 and a sensing assembly 60, the detection ring 50 is sleeved on the oil inlet seat 40, a plurality of detection guide rods 70 arranged along the circumferential direction penetrate through a flange of the fixed disc 30 to be fixedly connected with the piston rod 20, the sensing assembly 60 is installed on the oil inlet seat 40 and comprises two proximity switches 61 for detecting the detection ring 50 moving synchronously with the piston rod 20.

When oil enters the rodless cavity of the cylinder barrel 10, hydraulic oil enters the rotary oil inlet assembly through the rodless oil inlet hole in the oil inlet seat 40 and enters the rodless cavity through the first oil path of the fixed disk 30, so that the piston rod 20 extends out; when oil enters the rod cavity of the cylinder barrel 10, hydraulic oil enters the rotary oil inlet assembly through the rod oil inlet hole in the oil inlet seat 40 and enters the annular oil cavity through the second oil path of the fixed disk 30, and the hydraulic oil in the annular oil cavity enters the rod cavity through the two oil inlet paths in the cylinder barrel 10, so that the piston rod 20 retracts; the detection ring 50 is fixed on the piston rod 20 and synchronously moves with the piston rod 20, and the sensing assembly 60 arranged on the oil inlet seat 40 detects the starting position and the ending position of the piston rod 20 through the detection ring 50. The utility model discloses a setting of detection circle 50 has avoided piston rod 20 to rotate under the effect of the radial force and has leaded to the detected signal inefficacy, can effectively carry out real-time detection to piston rod 20's stroke, improves the convenience to cylinder control to detection circle 50 is connected with piston rod 20 through detecting guide arm 70, and simple structure is compact, has guaranteed the accuracy that 20 stroke top and end positions of piston rod detected.

As shown in fig. 2 to 3, a blocking piece 80 is disposed on a connecting surface of the piston rod 20 and the detection guide rod 70, an end portion of the detection guide rod 70 is embedded in the piston rod 20, a clamping groove 71 is disposed at a position corresponding to the blocking piece 80, and the blocking piece 80 is embedded in the clamping groove 71.

Specifically, through the arrangement of the blocking piece 80, the displacement of the detection guide rod 70 along the axial direction is limited, the connection stability of the detection guide rod 70 and the piston rod 20 is ensured, and the accuracy of the detection of the stroke start and end positions of the piston rod 20 is improved.

The utility model discloses in the preferred embodiment, oil feed seat 40 includes into oil shell 41 and back lid 42, detects circle 50 covers and establishes on into oil shell 41, and response subassembly 60 sets up on back lid 42, and the diameter of its back lid 42 is greater than the diameter of into oil shell 41.

Specifically, the oil inlet seat 40 adopts a split structure design, so that the processing difficulty is reduced, the installation convenience is improved, the length of the oil inlet shell 41 is greater than that of the detection guide rod 70, the retraction stroke of the piston rod 20 is effectively ensured, and in addition, the diameter of the rear cover 42 is greater than that of the oil inlet shell 41, so that the installation space of the induction assembly 60 is ensured.

On the basis of the above embodiment, in order to ensure the synchronous movement of the detection ring 50 and the piston rod 20, a gap exists between the inner hole of the detection ring 50 and the outer circular surface of the oil inlet casing 41, so that the phenomenon of blocking caused by inclination of the detection ring 50 is avoided, the detection feasibility is ensured, and the service life of the detection ring 50 is prolonged.

In order to reduce the friction resistance when the oil cylinder rotates, a gap exists between the oil inlet shell 41 and the flange end face of the fixed disc 30.

As a preference of the above embodiment, the sensing assembly 60 further includes a sensing bracket 62, which includes a cushion block 621 fixed on the rear cover 42, and a mounting plate 622 disposed on the cushion block 621; the mounting plate 622 is provided with a first mounting surface and a second mounting surface, the first mounting surface and the second mounting surface are both provided with adjusting plates, and the two proximity switches 61 are respectively arranged on the adjusting plates on the first mounting surface and the second mounting surface.

Specifically, the first installation surface and the second installation surface are arranged at a certain included angle, and the distance between the tangent point of the first installation surface and the circle center of the second installation surface on the excircle is equal, so that the detection angles from the two proximity switches 61 to the detection ring 50 are the same, and the detection accuracy is improved.

The utility model discloses in the preferred embodiment, as shown in fig. 4~5, be equipped with sealing washer 90 on the outer cylindrical surface that detects guide arm 70 and fixed disk 30 contact, guaranteed the leakproofness in no pole chamber, improved the stability of piston rod 20 motion.

In order to increase the guidance of the piston rod 20 along the axial direction, a step shaft 31 is arranged on one side of the fixed disk 30 facing the cylinder 10, the step shaft 31 extends into the inner hole of the piston rod 20, a sealing ring 90 is arranged in the inner hole of the piston rod 20, an air injection hole 32 is arranged at the center of the fixed disk 30 along the axial direction, and an air injection nozzle is arranged on the rear cover and communicated with the air injection hole 32.

Specifically, by the arrangement of the step shaft 31, the influence of the detection guide rod 70 on the movement accuracy of the piston rod 20 is avoided, and the gas injection nozzle on the rear cover 42 is communicated with the gas injection hole 32, and gas is discharged from the inner hole of the piston rod 20 through the gas injection hole 32.

It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A gas injection type oil cylinder with a stroke detection function comprises a cylinder barrel (10) and a piston rod (20) movably arranged in the cylinder barrel (10), and is characterized in that a rotary oil inlet assembly and a stroke detection assembly are arranged at the bottom of the cylinder barrel (10);

the rotary oil inlet assembly comprises a fixed disc (30) fixed to the bottom of the cylinder barrel (10) and an oil inlet seat (40) arranged on the fixed disc (30) in a rotating mode, the stroke detection assembly comprises a detection ring (50) and a sensing assembly (60), the detection ring (50) is arranged on the oil inlet seat (40) in a sleeved mode, a plurality of detection guide rods (70) arranged in the circumferential direction penetrate through a flange of the fixed disc (30) and a piston rod (20) and are fixedly connected, the sensing assembly (60) is arranged on the oil inlet seat (40) and comprises two proximity switches (61) used for detecting and synchronously moving the piston rod (20) and the detection ring (50).

2. The gas injection type cylinder with stroke detection function according to claim 1, wherein a blocking piece (80) is disposed on a connecting surface of the piston rod (20) and the detection guide rod (70), an end portion of the detection guide rod (70) is embedded into the piston rod (20), a locking groove (71) is disposed at a position corresponding to the blocking piece (80), and the blocking piece (80) is embedded into the locking groove (71).

3. The gas injection type cylinder with stroke detection as claimed in claim 1, wherein the oil inlet seat (40) comprises an oil inlet housing (41) and a rear cover (42), the detection ring (50) is sleeved on the oil inlet housing (41), the sensing assembly (60) is arranged on the rear cover (42), and the diameter of the rear cover (42) is larger than that of the oil inlet housing (41).

4. The gas injection type cylinder with stroke detection according to claim 3, wherein there is a gap between the inner hole of the detection ring (50) and the outer circumferential surface of the oil inlet housing (41).

5. The gas injection type cylinder with stroke detection as claimed in claim 3, wherein a gap exists between the oil inlet casing (41) and the flange end face of the fixed disk (30).

6. The gas injection type belt stroke detecting cylinder according to claim 3, wherein the sensing assembly (60) further comprises a sensing bracket (62) including a cushion block (621) fixed on the rear cover (42), and a mounting plate (622) disposed on the cushion block (621);

the mounting plate (622) is provided with a first mounting surface and a second mounting surface, adjusting plates are arranged on the first mounting surface and the second mounting surface, and the proximity switches (61) are arranged on the adjusting plates on the first mounting surface and the second mounting surface respectively.

7. The gas injection type cylinder with stroke detection as claimed in claim 1, wherein a sealing ring (90) is disposed on an outer cylindrical surface of the detection guide rod (70) contacting the fixed plate (30).

8. The gas injection type cylinder with stroke detection as claimed in claim 1, wherein a step shaft (31) is provided on a side of the fixed plate (30) facing the cylinder (10), the step shaft (31) extends into the inner bore of the piston rod (20), and a sealing ring (90) is provided in the inner bore of the piston rod (20).

9. The gas injection type cylinder with stroke detection as claimed in claim 3, wherein the center of the fixed disk (30) is provided with a gas injection hole (32) along the axial direction.

10. The gas injection type oil cylinder with stroke detection as claimed in claim 9, wherein the rear cover is provided with a gas injection nozzle, and the gas injection nozzle is communicated with the gas injection hole (32).