Hydraulic cylinder with stroke detection function

Abstract

The utility model discloses a hydraulic cylinder with a stroke detection function, and relates to the technical field of hydraulic cylinders. The lower end of the cylinder barrel is provided with an end cover, the upper end of the cylinder barrel is provided with a gland, the inner wall of the gland is in sliding fit with a telescopic rod, the lower end of the telescopic rod is fixedly connected with a piston, one side of the gland is provided with a magneto-dependent sensor assembly, the inner wall of the telescopic rod is provided with a plurality of magnetic scales, and the upper side of the gland is provided with a mounting shell; a sponge ring is arranged in the mounting shell, and a plurality of permeation holes are uniformly formed in the inner wall of the mounting shell. Through the arrangement of the extrusion mechanism, an operator can rotate a knob to drive the extrusion mechanism, accurately control the extrusion force on a sponge ring and extrude lubricating liquid as required, waste is avoided, the lubricating effect is guaranteed, shutdown maintenance is reduced, the service life of the hydraulic cylinder is prolonged, a built-in magnetic scale and a magneto-dependent sensor assembly are tightly integrated, and the reliability of the hydraulic cylinder is improved. Accurate and stable stroke detection is ensured, and a solid foundation is laid for automatic control.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of hydraulic cylinder, concretely relates to a hydraulic cylinder with stroke detection. BACKGROUND

[0002] In today's industrial field, as a widely used executive element, the performance of the hydraulic cylinder directly affects the running efficiency and stability of the whole equipment. The friction and wear problem between the piston rod and the cylinder barrel has been a key problem that troubles the user during the long-term use of the traditional hydraulic cylinder. In order to solve this problem, many technologies have emerged, among which the lubricating mechanism equipped on the hydraulic cylinder has become a common improvement direction.

[0003] The Chinese patent with the application number CN202022128348.2 discloses a hydraulic cylinder with stroke detection, which comprises a hydraulic cylinder main body, a lubricating mechanism is arranged on the outer side of the top end of the hydraulic cylinder main body, the lubricating mechanism comprises an oil injection ring, an oil injection groove is formed in the inside of the oil injection ring, an extension rod is arranged on the inside of the oil injection ring, oil guide holes are formed on the inside surface of the oil injection ring, a sponge pad is arranged on the inside of the oil injection groove, extrusion blocks are arranged on both sides of the sponge pad, a pull block is arranged on one side of the extrusion block, a first limiting groove is formed on the outer side of the inner wall of the oil injection ring, and springs are arranged on both sides of the pull block.

[0004] The above-mentioned scheme uses the designed lubricating mechanism to pull the pull block, inject the lubricating oil, and continuously extrude the sponge pad under the action of the spring. The intention is to make the lubricating oil absorbed by the sponge pad evenly coated on the extension rod to reduce the friction. However, in actual application, the lubricating oil in the sponge pad is excessively extruded in the local area due to the continuous pressure of the extrusion block, which cannot comprehensively and effectively lubricate the piston rod. This continuous high-intensity extrusion makes the lubricating oil not fully penetrate and diffuse in the sponge pad, causing a large amount of lubricating oil to be squeezed out without playing a role, which not only wastes resources but also cannot achieve the ideal lubrication effect.

[0005] Therefore, the utility model is provided. UTILITY MODEL CONTENT

[0006] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide a hydraulic cylinder with stroke detection.

[0007] To solve the above technical problems, the basic idea of the technical scheme of the utility model is as follows:

[0008] The hydraulic cylinder with stroke detection comprises a cylinder barrel, an end cover arranged at the lower end of the cylinder barrel, a gland arranged at the upper end of the cylinder barrel, a telescopic rod slidingly matched with the inner wall of the gland, a piston fixedly connected with the lower end of the telescopic rod, a magnetic sensor assembly arranged at one side of the gland, a plurality of magnetic scales arranged on the inner wall of the telescopic rod, a mounting shell arranged on the upper side of the gland, a sponge ring arranged in the mounting shell, a plurality of penetration holes uniformly arranged on the inner wall of the mounting shell, and an extrusion mechanism arranged in the mounting shell.

[0009] By arranging the extrusion mechanism, the operator can drive the extrusion mechanism by rotating the knob, accurately control the extrusion force of the sponge ring, and squeeze out the lubricating liquid as needed, which avoids waste and guarantees lubrication effect, reduces downtime maintenance, prolongs the service life of the hydraulic cylinder, and tightly integrates the built-in magnetic scale and the magnetic sensor assembly, thereby ensuring accurate and stable stroke detection and laying a foundation for automatic control.

[0010] Preferably, the piston is slidingly matched with the inner wall of the cylinder barrel, and the plurality of magnetic scales are matched with the magnetic sensor assembly.

[0011] Preferably, the extrusion mechanism comprises two bidirectional screws rotatingly matched with the inner wall of the mounting shell, two driving blocks threadedly matched with the bidirectional screws, an arc-shaped extrusion plate fixedly connected with the opposite side of the two driving blocks, a worm rotatingly matched with the lower side of the inner wall of the mounting shell, a worm wheel arranged at one end of one of the two bidirectional screws, a driving wheel arranged at one end of one of the two bidirectional screws, a driven wheel arranged at one end of the other one of the two bidirectional screws, and a knob fixedly connected with the upper end of the worm.

[0012] Preferably, the two arc-shaped extrusion plates are matched with the sponge ring, the worm is engaged with the worm wheel, and the driving wheel is connected with the driven wheel through belt tensioning.

[0013] Preferably, a one-way valve is arranged on the upper side of the mounting shell and matched with the sponge ring.

[0014] Preferably, a sealing ring is arranged on each side of the mounting shell and matched with the telescopic rod.

[0015] Preferably, a plurality of pull rods are arranged between the end cover and the gland.

[0016] Preferably, an oil port hole is arranged on one side of each of the end cover and the gland, and a U-shaped connecting block is arranged on the upper end of the telescopic rod.

[0017] After the above technical scheme is adopted, the present application has the following advantages compared with the prior art.

[0018] By setting the extrusion mechanism, the operator rotates the knob to drive the extrusion mechanism, accurately controls the extrusion degree of the sponge ring, extrudes the lubricating liquid as needed, avoids waste and guarantees the lubricating effect, reduces downtime maintenance, prolongs the service life of the hydraulic cylinder, and the built-in magnetic scale and the magnetic sensor component are tightly integrated, ensuring accurate and stable stroke detection, laying a foundation for automatic control.

[0019] The specific embodiments of the utility model will be described in further detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0020] The drawings in the following description are only some embodiments, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings. In the drawings:

[0021] Figure 1 It is a three-dimensional structure schematic view of an embodiment of the utility model;

[0022] Figure 2 It is an internal structure schematic view of an embodiment of the utility model;

[0023] Figure 3 It is a telescopic rod section structure schematic view of an embodiment of the utility model;

[0024] Figure 4 It is an installation shell structure schematic view of an embodiment of the utility model;

[0025] Figure 5 It is an installation shell section structure schematic view of an embodiment of the utility model.

[0026] In the drawings, the component list represented by each sign is as follows:

[0027] 1, cylinder barrel; 2, end cover; 3, gland; 4, telescopic rod; 5, piston; 6, magnetic sensor component; 7, magnetic scale; 8, installation shell; 9, sponge ring; 10, penetration hole; 11, extrusion mechanism; 111, bidirectional screw rod; 112, driving block; 113, arc extrusion plate; 114, worm; 115, worm wheel; 116, driving wheel; 117, driven wheel; 118, knob; 12, check valve; 13, sealing ring; 14, pull rod; 15, oil port hole; 16, U-shaped connecting block.

[0028] It should be noted that these drawings and textual descriptions are not intended to limit the concept range of the utility model in any way, but to illustrate the concept of the utility model to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments.

[0030] Therefore, the following detailed description of the embodiments of the present application is not intended to limit the scope of the claimed application, but merely represents some embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0031] It should be noted that the embodiments in the present application and the features and technical solutions in the embodiments can be combined with each other without conflict.

[0032] It should be noted that: similar labels and letters in the following drawings represent similar items, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0033] In the description of the present application, it should be noted that the orientation or position relationship indicated by the terms "upper", "lower" and the like is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the present application is usually placed, or the orientation or position relationship commonly understood by those skilled in the art. Such terms are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0034] In order for those skilled in the art to better understand the present application, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings.

[0035] It should be noted that the embodiments in the present application and the features and technical solutions in the embodiments can be combined with each other without conflict.

[0036] It should be noted that: similar labels and letters in the following drawings represent similar items, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0037] Embodiment 1

[0038] Please refer to Figures 1-5The utility model provides a kind of hydraulic cylinder with stroke detection, comprising: cylinder 1, the lower end of cylinder 1 is equipped with end cover 2, the upper end of cylinder 1 is equipped with gland 3, the inner wall of gland 3 is slidably fitted with telescopic rod 4, the lower end of telescopic rod 4 is fixedly connected with piston 5, one side of gland 3 is equipped with magnetic sensor assembly 6, the inner wall of telescopic rod 4 is provided with multiple magnetic scales 7, the upper side of gland 3 is provided with mounting shell 8, the inside of mounting shell 8 is equipped with sponge ring 9, multiple permeation holes 10 are evenly provided on the inner wall of mounting shell 8, extrusion mechanism 11 is arranged in the inside of mounting shell 8.Piston 5 is slidably fitted in the inner wall of cylinder 1, and multiple magnetic scales 7 cooperate with magnetic sensor assembly 6.The upper side of mounting shell 8 is equipped with one-way valve 12, and one-way valve 12 cooperates with sponge ring 9.Sealing ring 13 is arranged on the both sides of mounting shell 8, and sealing ring 13 cooperates with telescopic rod 4.A plurality of pull rods 14 are arranged between end cover 2 and gland 3, and the two ends of pull rod 14 are respectively matched with end cover 2 and gland 3.Oil hole 15 is formed in one side of end cover 2 and gland 3, and the upper end of telescopic rod 4 is equipped with U-shaped connecting block 16.

[0039] Implementation process: when hydraulic oil enters the inside of cylinder 1 from oil hole 15 on end cover 2 or gland 3, hydraulic oil exerts pressure on piston 5, pushes piston 5 to slide upwards on the inner wall of cylinder 1, since telescopic rod 4 is fixedly connected with piston 5, the movement of piston 5 drives telescopic rod 4 to synchronously extend upwards, in this process, multiple magnetic scales 7 arranged on the inner wall of telescopic rod 4 move together with telescopic rod 4, while magnetic sensor assembly 6 on one side of gland 3 is fixed, the relative position of magnetic scale 7 and magnetic sensor assembly 6 changes, magnetic sensor assembly 6 can sensitively perceive the magnetic field change of magnetic scale 7, according to its built-in detection principle and algorithm, converts magnetic field signal into electric signal and transmits to external control system, external control system processes these electric signals, accurately calculates the real-time stroke of telescopic rod 4, so as to realize accurate detection of the stroke of hydraulic cylinder, on the contrary, when hydraulic oil is discharged from the other oil hole 15, under the action of external load or other reset force, piston 5 drives telescopic rod 4 to retract, similarly, magnetic scale 7 and magnetic sensor assembly 6 continuously interact, real-time feedback stroke information.

[0040] Implementation benefit: built-in magnetic scale 7 and magnetic sensor assembly 6 are directly integrated on the main structure of hydraulic cylinder, which can provide reliable real-time stroke data for equipment control system, realize more accurate automatic control.

[0041] Example 2

[0042] The extrusion mechanism 11 comprises two bidirectional screws 111 which are rotatably fitted on the inner wall of the mounting shell 8, two driving blocks 112 are threadedly fitted on the bidirectional screws 111, the opposite sides of the two driving blocks 112 are fixedly connected with an arc-shaped extrusion plate 113, the lower side of the inner wall of the mounting shell 8 is rotatably fitted with a worm 114, one end of one of the two bidirectional screws 111 is provided with a worm wheel 115, one end of one of the two bidirectional screws 111 is provided with a driving wheel 116, one end of the other of the two bidirectional screws 111 is provided with a driven wheel 117, and the upper end of the worm 114 is fixedly connected with a knob 118. The two arc-shaped extrusion plates 113 are matched with the sponge ring 9, the worm 114 is engaged with the worm wheel 115, and the driving wheel 116 is tautly connected with the driven wheel 117 through a belt.

[0043] Implementation process: Before or during the operation of the hydraulic cylinder, if it is necessary to lubricate and protect the telescopic rod 4, the operator can start the extrusion mechanism 11 by rotating the knob 118, the knob 118 drives the worm 114 to rotate, since the worm 114 is engaged with the worm wheel 115, the rotation of the worm 114 drives the worm wheel 115 to rotate, and the worm wheel 115 is coaxially connected with one of the two bidirectional screws 111, so that the bidirectional screw 111 rotates, and since the two bidirectional screws 111 are linked through the driving wheel 116, the driven wheel 117 and the belt, the other bidirectional screw 111 also rotates synchronously, when the bidirectional screw 111 rotates, the two driving blocks 112 which are threadedly fitted on the bidirectional screw 111 move towards or away from each other, the two driving blocks 112 drive the arc-shaped extrusion plates 113 to extrude the sponge ring 9, the sponge ring 9 has pre-stored lubricating liquid inside, under the extrusion action, the lubricating liquid seeps out through the multiple penetration holes 10 evenly arranged on the inner wall of the mounting shell 8, and is applied on the surface of the telescopic rod 4, thereby playing a lubricating role, reducing the friction between the telescopic rod 4 and the pressure cover 3, and also preventing dust, impurities and the like from adhering to the telescopic rod 4 to a certain extent, when the lubricating liquid in the sponge ring 9 needs to be replenished, the single-way valve 12 on the upper side of the mounting shell 8 can be used for adding lubricating liquid, the single-way valve 12 ensures that the lubricating liquid can only flow into the sponge ring 9 in one direction, preventing the lubricating liquid from flowing back during the operation of the hydraulic cylinder, and the sealing rings 13 on both sides of the mounting shell 8 are tightly attached to the telescopic rod 4, which not only prevents the lubricating liquid from leaking from the gap between the mounting shell 8 and the telescopic rod 4, but also further blocks the external dust and other pollutants from entering the inside of the mounting shell 8, thereby ensuring the stable operation of the lubricating and protecting system.

[0044] Implementation benefits: The self-lubricating and protecting system composed of the specially designed mounting shell 8, the extrusion mechanism 11 inside the mounting shell 8 and the sponge ring 9 enables the hydraulic cylinder to have self-lubricating and protecting capabilities. The operator can conveniently replenish the lubricating liquid for the telescopic rod 4 at any time, without the need to stop the machine and disassemble the complex lubricating device, thereby reducing the equipment maintenance time and cost.

[0045] The above examples are only used to illustrate the technical solutions described in the utility model and do not limit the utility model. Although the utility model has been described in detail with reference to the above-described various embodiments, the utility model is not limited to the above-described specific embodiments, and therefore any modification or equivalent replacement of the utility model; and all technical solutions and improvements that do not deviate from the spirit and scope of the invention are all included in the scope of the claims of the utility model.

Claims

1. A hydraulic cylinder with stroke detection, characterized in that The utility model relates to a piston pump, including: The lower end of cylinder barrel (1) is equipped with end cover (2), the upper end of cylinder barrel (1) is equipped with gland (3), the inner wall of gland (3) is slidably connected with telescopic rod (4), the lower end of telescopic rod (4) is fixedly connected with piston (5), one side of gland (3) is equipped with magnetic sensor assembly (6), the inner wall of telescopic rod (4) is provided with multiple magnetic scales (7), the upper side of gland (3) is provided with installation shell (8), the inside of installation shell (8) is equipped with sponge ring (9), the inner wall of installation shell (8) is evenly provided with multiple permeation holes (10), the inside of installation shell (8) is provided with extrusion mechanism (11).

2. The hydraulic cylinder with stroke detection of claim 1, wherein, Piston (5) is slidably connected in the inner wall of cylinder barrel (1), multiple magnetic scales (7) are matched with magnetic sensor assembly (6).

3. The hydraulic cylinder with stroke detection of claim 1, wherein, Extrusion mechanism (11) includes two bidirectional screw rods (111) that are rotatably connected in the inner wall of installation shell (8), two driving blocks (112) are threadedly connected on the bidirectional screw rod (111), one arc extrusion plate (113) is fixedly connected to the opposite side of two driving blocks (112), a worm (114) is rotatably connected to the lower side of the inner wall of installation shell (8), a worm wheel (115) is arranged at one end of one of two bidirectional screw rods (111), a driving wheel (116) is arranged at one end of one of two bidirectional screw rods (111), a driven wheel (117) is arranged at one end of the other of two bidirectional screw rods (111), and a knob (118) is fixedly connected to the upper end of the worm (114).

4. The hydraulic cylinder with travel detection of claim 3, wherein, Two arc extrusion plates (113) are matched with sponge ring (9), the worm (114) is engaged with the worm wheel (115), and the driving wheel (116) is connected to the driven wheel (117) through a belt.

5. The hydraulic cylinder with travel detection of claim 1, wherein, The upper side of installation shell (8) is equipped with one-way valve (12), and one-way valve (12) is matched with sponge ring (9).

6. The hydraulic cylinder with travel detection of claim 1, wherein, Both sides of installation shell (8) are provided with sealing rings (13), and the sealing rings (13) are matched with telescopic rod (4).

7. The hydraulic cylinder with travel detection of claim 1, wherein, Multiple pull rods (14) are arranged between end cover (2) and gland (3), and the two ends of pull rod (14) are matched with end cover (2) and gland (3) respectively.

8. The hydraulic cylinder with travel detection of claim 1, wherein, The side of end cover (2) and gland (3) is provided with oil hole (15), and the upper end of telescopic rod (4) is equipped with U-shaped connecting block (16).

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