Long-stroke hydraulic cylinder with built-in displacement sensor

Abstract

The utility model relates to a long-stroke hydraulic cylinder with a built-in displacement sensor, which belongs to the technical field of long-stroke hydraulic cylinders and comprises a cylinder body, a cylinder bottom is fixedly mounted at one end of the cylinder body, a cylinder top is fixedly mounted at the other end of the cylinder body, a piston plate is movably connected inside the cylinder body, and a piston rod is fixedly connected to one side of the piston plate. A pull handle is fixedly connected to the end, away from the piston plate, of the piston rod, a magnetic ring is arranged on the outer side of the piston rod, a displacement sensor body and a waveguide rod are arranged in the cylinder bottom, a built-in mechanism is arranged in the cylinder bottom, replacement mechanisms are arranged at the two ends of the outer side of the cylinder body, and sealing mechanisms are arranged between the cylinder bottom and the cylinder body and between the cylinder top and the cylinder body. The utility model has the beneficial effects that through the arrangement of the replacement mechanism, the cylinder bottom and the cylinder top can be conveniently separated from the inside of the cylinder body, so that the independent magnetic ring and waveguide rod can be conveniently replaced and overhauled, and through the arrangement of the sealing mechanism, the sealing performance between the cylinder bottom and the cylinder body and between the cylinder top and the cylinder body can be enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to long stroke hydraulic cylinder technical field especially relates to a built -in displacement sensor's long stroke hydraulic cylinder. BACKGROUND

[0002] Hydraulic cylinder is the actuating mechanism of hydraulic system, is widely used in a variety of hydraulic control system, is mainly divided into force control and displacement control two types, among them, in displacement control system, system sends displacement instruction to hydraulic cylinder, and the displacement signal of hydraulic cylinder is gathered to control system and displacement instruction is compared, the opening of servo valve or proportional valve is controlled to control the movement of hydraulic cylinder, to reach the purpose of accurate action, and the displacement of hydraulic cylinder is gathered and is realized through the displacement sensor integrated on the hydraulic cylinder.

[0003] Through the retrieval, China patent discloses a kind of high-precision displacement control hydraulic cylinder system (authorized announcement No.CN206368871U), including controller, hydraulic cylinder, first displacement sensor and second displacement sensor, wherein, the first displacement sensor and second displacement sensor are used to detect the displacement of the output rod of hydraulic cylinder, and the range of first displacement sensor is greater than the range of second displacement sensor;The controller can receive the displacement feedback signal of the first displacement sensor, second displacement sensor and select main feedback signal, the controller can control the action of hydraulic cylinder, the patent technology although has large stroke, but also can greatly improve displacement control precision in small stroke range;This kind of hydraulic cylinder system is simple to realize, and it widens the application field of hydraulic cylinder, and is widely used.

[0004] At present, displacement sensor is usually arranged outside hydraulic cylinder, and corresponds to the magnet on the piston in the hydraulic cylinder, since displacement sensor is arranged outside hydraulic cylinder, not only occupies space, but also is easily influenced by surrounding working environment, such as oil stain, solution, dust pollution, leading to its detection precision is lower and lower, gradually unable to meet the requirements of automatic control, and long stroke hydraulic cylinder is used for a long time, its inside magnetic ring and waveguide rod will be worn or damaged, need to disassemble hydraulic cylinder, the existing hydraulic cylinder structure is complex, disassembly is troublesome, further inconvenient to overhaul and maintenance. UTILITY MODEL CONTENTS

[0005] In view of the prior art, since the displacement sensor is arranged outside the hydraulic cylinder, it not only occupies space, but also is easily affected by the surrounding working environment, such as oil stains, solution, dust pollution, resulting in its detection accuracy is getting lower and lower, gradually unable to meet the requirements of automatic control, and the magnetic ring and the waveguide rod in the long-stroke hydraulic cylinder will be worn or damaged after long time use, the hydraulic cylinder needs to be disassembled, the existing hydraulic cylinder structure is complex, disassembly is troublesome, and then it is inconvenient to maintain and maintain, the main purpose of the utility model is to provide a long-stroke hydraulic cylinder with built-in displacement sensor.

[0006] The technical scheme of the utility model is as follows: a long-stroke hydraulic cylinder with built-in displacement sensor, including cylinder body, one end of the cylinder body is fixedly installed with cylinder bottom, the other end of the cylinder body is fixedly installed with cylinder top, the inside of the cylinder body is movably connected with piston plate, one side of the piston plate is fixedly connected with piston rod, the end of the piston rod away from the piston plate is fixedly connected with pull handle, the outside of the piston rod is provided with magnetic ring, the inside of the cylinder bottom is provided with displacement sensor body and waveguide rod, the inside of the cylinder bottom is provided with built-in mechanism, both ends of the outside of the cylinder body are provided with replacement mechanism, the cylinder bottom and the cylinder top are both provided with sealing mechanism between the cylinder body.

[0007] Through the replacement mechanism, the cylinder bottom and the cylinder top can be separated from the cylinder body, and the magnetic ring and the waveguide rod can be replaced and maintained, and the sealing performance between the cylinder bottom, the cylinder top and the cylinder body is enhanced through the sealing mechanism.

[0008] As a preferred embodiment, the replacement mechanism includes L-shaped plates fixedly connected to both ends of the outside of the cylinder body, the inside of the L-shaped plate is provided with a insertion hole, both sides of the cylinder bottom and the cylinder top are fixedly connected with fixed boxes, the inside of the fixed box is slidably connected with a transmission block, one side of the transmission block close to the insertion hole is fixedly connected with an insertion rod, the insertion rod is clamped with the corresponding insertion hole, both sides of the cylinder body are provided with external threads, the inner walls of the cylinder bottom and the cylinder top are provided with internal threads, the cylinder bottom and the cylinder top are threadedly connected with the cylinder body.

[0009] Through the internal threads and the external threads, the cylinder bottom and the cylinder top can be quickly installed on both sides of the cylinder body, the connection between the cylinder bottom and the cylinder body and the cylinder body is enhanced, and the insertion rod and the insertion hole can be clamped together as the transmission block is tightly contacted.

[0010] As a preferred implementation, the replacement mechanism further comprises a screw rod threadedly connected inside the L-shaped plate, the inner walls of the fixed box are slidably connected with sliding blocks, one end of the screw rod extends into the interior of the fixed box and is rotatably connected with the sliding blocks, the sliding blocks abut against the sides of the transmission blocks close to the sliding blocks, and the outer sides of the insertion rods are each sleeved with a spring.

[0011] By adopting the above technical scheme, the rotation of the screw rod can drive the sliding blocks to slide in the fixed box, thereby achieving the fixation between the L-shaped plate and the fixed box and the quick disassembly design between the cylinder bottom and the cylinder body and between the cylinder top and the cylinder body.

[0012] As a preferred implementation, the sealing mechanism comprises sealing rings fixedly connected to the two sides of the cylinder body, the interiors of the cylinder bottom and the cylinder top are each provided with a sealing groove matched with the sealing ring, and the sealing rings are each clamped with the sealing groove.

[0013] By matching the sealing groove with the sealing ring, the sealing property between the cylinder bottom and the cylinder top and the cylinder body can be improved, thereby avoiding liquid leakage.

[0014] As a preferred implementation, the built-in mechanism comprises a base fixedly connected to the inner wall of the cylinder bottom, the interior of the base is provided with a mounting groove, the displacement sensor body is fixedly installed in the interior of the mounting groove, one end of the displacement sensor body is fixedly connected with a waveguide rod, and the interior of the piston plate is embedded with a control valve block.

[0015] By adopting the above technical scheme, the displacement sensor body is fixedly installed in the mounting groove by using the bolt, thereby saving space and avoiding the influence of the surrounding working environment.

[0016] As a preferred implementation, the side of the base close to the piston plate is fixedly connected with an anti-collision ring, and the side of the cylinder top close to the piston plate is fixedly connected with an anti-collision disc.

[0017] By adopting the above technical scheme, the anti-collision disc and the anti-collision ring can reduce the impact of the piston plate on the cylinder bottom and the cylinder top.

[0018] As a preferred implementation, the two ends of the top of the cylinder body are each fixedly connected with an oil inlet pipe, and the sides of the transmission blocks and the sliding blocks close to each other are each provided with a matched inclined surface.

[0019] By adopting the above technical scheme, the oil inlet pipe can guide hydraulic oil into the cylinder body.

[0020] Compared with the prior art, the utility model has the advantages and positive effects that,

[0021] 1. The utility model discloses a sliding block is slid in fixed box through the rotation of screw rod, not only can realize the fixing between L-shaped board and fixed box, can realize the quick detachable design between cylinder bottom and cylinder body, cylinder top and cylinder body, to separate cylinder bottom and cylinder top from the cylinder body, and then facilitate the replacement and overhaul of magnetic ring and waveguide rod.

[0022] 2. The utility model discloses a displacement sensor body is fixedly installed in the installation groove through the use of bolt, and then can save space, can avoid the influence of surrounding working environment simultaneously, and then can satisfy the requirement of automatic control. DRAWINGS

[0023] Figure 1 It is the extension state structural diagram of the utility model;

[0024] Figure 2 It is the contraction state structural diagram of the utility model;

[0025] Figure 3 It is the internal structure schematic diagram of the utility model;

[0026] Figure 4 It is the utility model Figure 3 The enlarged view of A.

[0027] Legend: 1, cylinder body;2, piston rod;3, pull handle;4, L-shaped board;5, oil inlet pipe;6, cylinder bottom;7, cylinder top;8, base;9, displacement sensor body;10, waveguide rod;11, plug rod;12, piston plate;13, magnetic ring;14, control valve block;15, anti -collision ring;16, sealing ring;17, sealing groove;18, fixed box;19, jack;20, screw;21, transmission block;22, spring. DETAILED DESCRIPTION

[0028] The technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0029] REFERENCE Figures 1-4The utility model provides a long -stroke hydraulic cylinder of built -in displacement sensor, including cylinder body 1, one end fixed mounting of cylinder body 1 has cylinder bottom 6, the other end fixed mounting of cylinder body 1 has cylinder top 7, the inside movable joint of cylinder body 1 has piston plate 12, one side fixed connection of piston plate 12 has piston rod 2, the end fixed connection of piston rod 2 away from piston plate 12 has pull handle 3, the outside of piston rod 2 is provided with magnetic ring 13, the inside of cylinder bottom 6 is provided with displacement sensor body 9 and waveguide rod 10, the inside of cylinder bottom 6 is provided with built -in mechanism, the both ends of cylinder body 1 outside are provided with replacement mechanism, and the both between cylinder bottom 6 and cylinder top 7 and cylinder body 1 are provided with sealing mechanism, through the setting of replacement mechanism, to facilitate the separation of cylinder bottom 6 and cylinder top 7 from cylinder body 1, to facilitate the replacement and overhaul of the individual magnetic ring 13 and waveguide rod 10, and through the setting of sealing mechanism, to enhance the sealing performance between cylinder bottom 6 and cylinder top 7 and cylinder body 1, avoid the leakage event of long -stroke hydraulic cylinder in the use process.

[0030] With reference to Figure 4 Replacement mechanism includes L-shaped plate 4 fixedly connected at the both ends of the outside of cylinder body 1, the inside of L-shaped plate 4 is provided with insertion hole 19, both sides of cylinder bottom 6 and cylinder top 7 are fixedly connected with fixed box 18, the inside of fixed box 18 is slidably connected with transmission block 21, both sides of transmission block 21 close to insertion hole 19 are fixedly connected with insertion rod 11, insertion rod 11 is clamped with corresponding insertion hole 19, both sides of cylinder body 1 are provided with external thread, the inner wall of cylinder bottom 6 and cylinder top 7 is provided with internal thread, cylinder bottom 6 and cylinder top 7 are threadedly connected with cylinder body 1, by setting internal thread and external thread, to facilitate the installation of cylinder bottom 6 and cylinder top 7 on both sides of cylinder body 1, and to strengthen the connection relationship between cylinder bottom 6 and cylinder body 1 and cylinder body 1, and with the abutting of transmission block 21, the clamping purpose between insertion rod 11 and insertion hole 19 can be realized, further improve the stability between cylinder bottom 6 and cylinder body 1 and cylinder body 1, ensure that long -stroke hydraulic cylinder can operate stably.

[0031] With reference to Figure 3 Replacement mechanism further includes screw rod 20 threadedly connected in the inside of L-shaped plate 4, the inner wall of fixed box 18 is slidably connected with sliding block, one end of screw rod 20 extends to the inside of fixed box 18 and is rotationally connected with sliding block, the side close to transmission block 21 of sliding block is abutted, the outside of insertion rod 11 is sleeved with spring 22, by the rotation of screw rod 20, sliding block can slide in fixed box 18, not only the fixation between L-shaped plate 4 and fixed box 18 can be realized, but also the quick dismounting design between cylinder bottom 6 and cylinder body 1 and cylinder top 7 and cylinder body 1 can be realized.

[0032] With reference to Figure 4The sealing mechanism comprises sealing rings 16 fixedly connected to both sides of the cylinder body 1, and sealing grooves 17 are formed in the interiors of the cylinder bottom 6 and the cylinder top 7 and used in cooperation with the sealing rings 16. The sealing rings 16 are clamped with the sealing grooves 17. The cooperation of the sealing grooves 17 and the sealing rings 16 can improve the sealing between the cylinder bottom 6, the cylinder top 7 and the cylinder body 1, and avoid liquid leakage.

[0033] With reference to Figure 3 The built-in mechanism comprises a base 8 fixedly connected to the inner wall of the cylinder bottom 6, and an installation groove is formed in the interior of the base 8. A displacement sensor body 9 is fixedly installed in the interior of the installation groove. One end of the displacement sensor body 9 is fixedly connected with a waveguide rod 10. A control valve block 14 is embedded in the interior of the piston plate 12. The displacement sensor body 9 is fixedly installed in the installation groove by using bolts. Thus, the space can be saved, the influence of the surrounding working environment can be avoided, and the requirement of automatic control can be met.

[0034] With reference to Figure 3 The base 8 is fixedly connected with an anti-collision ring 15 on the side close to the piston plate 12. The cylinder top 7 is fixedly connected with an anti-collision disc on the side close to the piston plate 12. The anti-collision disc and the anti-collision ring 15 can reduce the impact of the piston plate 12 on the cylinder bottom 6 and the cylinder top 7.

[0035] With reference to Figure 4 Both ends of the top of the cylinder body 1 are fixedly connected with oil inlet pipes 5. The transmission blocks 21 and the sliding blocks are provided with inclined surfaces used in cooperation on the sides close to each other. The hydraulic oil can be introduced into the cylinder body 1 through the oil inlet pipes 5.

[0036] Working principle: Firstly, the internal thread and the external thread are arranged to facilitate the installation of the cylinder bottom 6 and the cylinder top 7 on both sides of the cylinder body 1, to strengthen the connection relationship between the cylinder bottom 6, the cylinder top 7 and the cylinder body 1, to realize the clamping between the inserting rod 11 and the inserting hole 19 with the transmission block 21 tightly abutting, to further improve the stability between the cylinder bottom 6, the cylinder top 7 and the cylinder body 1, to ensure the stable operation of the long-stroke hydraulic cylinder, to drive the sliding block to slide in the fixed box 18 through the rotation of the screw rod 20, to realize the fixation between the L-shaped plate 4 and the fixed box 18, and to realize the quick dismounting design between the cylinder bottom 6 and the cylinder body 1 and between the cylinder top 7 and the cylinder body 1, to facilitate the separation of the cylinder bottom 6 and the cylinder top 7 from the cylinder body 1, to facilitate the replacement and maintenance of the separate magnetic ring 13 and the waveguide rod 10, and to fixedly install the displacement sensor body 9 in the installation groove by using bolts, to save the space and avoid the influence of the surrounding working environment, to meet the requirement of automatic control.

[0037] The above merely describes the preferred embodiments of the present application, and is not used to limit the present application, and although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or make equivalent replacements to some technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A long-stroke hydraulic cylinder with a built-in displacement sensor, comprising a cylinder body (1), characterized in that: One end of the cylinder body (1) is fixedly installed with a cylinder bottom (6), and the other end of the cylinder body (1) is fixedly installed with a cylinder top (7). A piston plate (12) is movably connected inside the cylinder body (1). A piston rod (2) is fixedly connected to one side of the piston plate (12). A handle (3) is fixedly connected to the end of the piston rod (2) away from the piston plate (12). A magnetic ring (13) is provided on the outside of the piston rod (2). A displacement sensor body (9) and a waveguide rod (10) are provided inside the cylinder bottom (6). An internal mechanism is provided inside the cylinder bottom (6). A replacement mechanism is provided at both ends of the outer side of the cylinder body (1). The replacement mechanism includes an L-shaped plate (4) fixedly connected to both ends of the outer side of the cylinder body (1). The L-shaped plate (4) has an insertion hole (19) inside. Fixed boxes (18) are fixedly connected to both sides of the cylinder bottom (6) and cylinder top (7). A transmission block (21) is slidably connected inside the fixed box (18). A plug rod (11) is fixedly connected to the side of the transmission block (21) near the insertion hole (19). The plug rod (11) is engaged with the corresponding insertion hole (19). External threads are provided on both sides of the cylinder body (1). Internal threads are provided on the inner walls of the cylinder bottom (6) and cylinder top (7). The cylinder bottom (6) and cylinder top (7) are threadedly connected to the cylinder body (1). The replacement mechanism also includes a threaded connection to the L-shaped plate (4). The screw (20) inside the shaped plate (4) and the inner wall of the fixed box (18) are slidably connected to the slider. One end of the screw (20) extends into the interior of the fixed box (18) and is rotatably connected to the slider. The slider abuts against the side of the transmission block (21) that is close to it. The outer side of the insert rod (11) is fitted with a spring (22). The cylinder bottom (6) and cylinder top (7) are both provided with a sealing mechanism between them and the cylinder body (1).

2. The long-stroke hydraulic cylinder with a built-in displacement sensor according to claim 1, characterized in that: The sealing mechanism includes sealing rings (16) fixedly connected to both sides of the cylinder body (1). The bottom (6) and top (7) of the cylinder are provided with sealing grooves (17) that cooperate with the sealing rings (16). The sealing rings (16) are engaged with the sealing grooves (17).

3. A long-stroke hydraulic cylinder with a built-in displacement sensor according to claim 1, characterized in that: The built-in mechanism includes a base (8) fixedly connected to the inner wall of the cylinder bottom (6), the base (8) has an installation groove inside, the displacement sensor body (9) is fixedly installed inside the installation groove, one end of the displacement sensor body (9) is fixedly connected to a waveguide rod (10), and the piston plate (12) has a control valve block (14) embedded inside.

4. A long-stroke hydraulic cylinder with a built-in displacement sensor according to claim 3, characterized in that: A collision ring (15) is fixedly connected to the side of the base (8) near the piston plate (12), and a collision disc is fixedly connected to the side of the cylinder top (7) near the piston plate (12).

5. A long-stroke hydraulic cylinder with a built-in displacement sensor according to claim 1, characterized in that: Both ends of the top of the cylinder (1) are fixedly connected to oil inlet pipes (5), and the transmission block (21) and the slider are provided with inclined surfaces for cooperation.

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