A hydraulic cylinder stroke deviation detection device

Abstract

The utility model discloses a stroke deviation detection device for a hydraulic cylinder, comprising a bracket and a hydraulic cylinder body, wherein a conical cylinder is fixedly connected to the bracket, the hydraulic cylinder body is placed in the conical cylinder, mounting plates are fixedly connected to both sides of the bracket, a limit assembly for fixing the hydraulic cylinder body is provided on the mounting plate, a transverse plate is fixedly connected between the two mounting plates, two slides are movably connected to the transverse plate, and a marking assembly and a warning assembly are provided on the two slides, so that when the piston rod of the hydraulic cylinder body is extended or retracted, the state of the piston rod deviation can be intuitively judged and marked in time. The utility model can not only mark the eccentricity in time by spraying the marking liquid inside the rubber ball from the needle tube and spraying it on the eccentricity of the piston rod, but also can rotate the gear by moving the rack, and then the shaft drives the fan blade to rotate, and the detection personnel can intuitively judge the eccentricity of the piston rod by the rotation of the fan blade, and the detection is more intuitive and accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinders, in particular to a stroke deviation detection device for a hydraulic cylinder. Background Art

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion or swinging motion. It has a simple structure and reliable operation. When it is used to achieve reciprocating motion, a deceleration device can be eliminated, and there is no transmission gap and the motion is smooth. Therefore, it is widely used in the hydraulic systems of various machines. After long-term use, the hydraulic cylinder needs to regularly detect the deviation of the piston rod extension and retraction. Traditional detection methods are mostly manual and direct judgment through visual observation. This observation is not intuitive enough and is prone to errors. In addition, the eccentric position that occurs during the detection process cannot be marked in time, and the detection has limitations. Therefore, a technician in this field provides a stroke deviation detection device for a hydraulic cylinder to solve the problems raised in the above background technology. Utility Model Content

[0003] The utility model aims to solve the shortcomings in the prior art and proposes a stroke deviation detection device for a hydraulic cylinder.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A stroke deviation detection device for a hydraulic cylinder comprises a bracket and a hydraulic cylinder body, wherein the bracket is fixedly connected with a conical cylinder, the hydraulic cylinder body is placed in the conical cylinder, mounting plates are fixedly connected on both sides of the bracket, a limiting assembly for fixing the hydraulic cylinder body is provided on the mounting plate, a cross plate is fixedly connected between the two mounting plates, two slide seats are movably connected on the cross plate, and marking assemblies and warning assemblies are provided on the two slide seats, so that when the piston rod of the hydraulic cylinder body is extended or retracted, the state of the piston rod offset can be intuitively judged and marked in time.

[0006] As a further solution of the utility model, the marking component is a needle tube, and the two slide seats are movably connected with the needle tube, and the needle tube is in contact with the piston rod of the hydraulic cylinder body. One end of the needle tube is fixedly connected to a rubber ball, and one side of the two slide seats is fixedly connected to a connecting frame, and the rubber ball is in contact with the connecting frame.

[0007] As a further solution of the utility model, the warning component is a fan blade, the two needle tubes are fixedly connected with a rack, the two slide seats are movably connected with a rotating shaft, the circumferential outer wall of the rotating shaft is fixedly connected with a gear, and the gear is meshed with the rack, and the fan blade is fixed at one end of the rotating shaft.

[0008] As a further solution of the utility model, the circumferential outer walls of the two needle tubes are movably connected with tension springs, and the two ends of the tension springs are respectively fixed to the needle tubes and the sliding seat.

[0009] As a further solution of the utility model, a bidirectional screw is movably connected between the two mounting plates, and the bidirectional screw passes through the two slide seats and is movably connected to the two slide seats.

[0010] As a further solution of the utility model, the limiting assembly is two locking rings, and the two mounting plates are both movably connected with a push rod, the two locking rings are respectively fixedly connected to one end of the push rod, the circumferential outer walls of the two push rods are both movably connected with a spring, and the two ends of the spring are respectively fixed to the push rod and the mounting plate.

[0011] The beneficial effects of the utility model are:

[0012] 1. Through the cooperation of the needle tube and the rubber ball, when the piston rod becomes eccentric during the extension process, the piston rod squeezes the needle tube to move it, and the marking liquid inside the rubber ball is ejected from the needle tube and sprayed on the eccentric part of the piston rod, marking the eccentric part in time to facilitate subsequent maintenance of the piston rod.

[0013] 2. Through the coordinated use of racks and gears, when the piston rod is eccentric, the rack moves to cause the gear to rotate, and then the shaft drives the fan blades to rotate. The inspector can visually judge whether the piston rod is eccentric through the rotation of the fan blades, and the detection is more intuitive and accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front side stereoscopic structural diagram of a hydraulic cylinder stroke deviation detection device proposed by the utility model;

[0015] Figure 2 This is a rear three-dimensional structural schematic diagram of a hydraulic cylinder stroke deviation detection device proposed by the utility model;

[0016] Figure 3 The utility model is a partial cross-sectional structural schematic diagram of a hydraulic cylinder stroke deviation detection device.

[0017] In the figure: 1. bracket; 2. mounting plate; 3. cross plate; 4. slide seat; 5. bidirectional screw; 6. hydraulic cylinder body; 7. conical cylinder; 8. locking ring; 9. spring; 10. push rod; 11. rubber ball; 12. connecting frame; 13. fan blade; 14. rotating shaft; 15. tension spring; 16. needle tube; 17. rack; 18. gear. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. It should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "setting" should be understood in a broad sense. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0019] Reference Figure 1-Figure 3 A stroke deviation detection device for a hydraulic cylinder comprises a bracket 1 and a hydraulic cylinder body 6. A conical cylinder 7 is fixed to the bracket 1 by bolts. The hydraulic cylinder body 6 is placed in the conical cylinder 7. When the hydraulic cylinder body 6 is kept vertical, it can be on the same central axis as the conical cylinder 7. Mounting plates 2 are fixed to both sides of the bracket 1 by bolts. The mounting plates 2 are provided with a limit assembly for fixing the hydraulic cylinder body 6. A cross plate 3 is fixed between the two mounting plates 2 by bolts. Two slide seats 4 are slidably connected to the cross plate 3. Marking assemblies and warning assemblies are provided on the two slide seats 4, so that when the piston rod of the hydraulic cylinder body 6 is extended or retracted, the state of the piston rod offset can be intuitively judged and marked in time.

[0020] In the utility model, the marking component is a needle tube 16, and the two slide seats 4 are both penetrated by the needle tube 16 for sliding connection, and the needle tube 16 is in contact with the piston rod of the hydraulic cylinder body 6. One end of the needle tube 16 is fixedly connected with a rubber ball 11, and one side of the two slide seats 4 is fixed with a connecting frame 12 by bolts, and the rubber ball 11 is in contact with the connecting frame 12, so that the piston rod of the hydraulic cylinder body 6 is controlled to extend slowly, and the piston rod extends and moves along the needle tube 16. If the piston rod is eccentric during the extension process, the piston rod will squeeze the needle tube 16 on one side. At this time, the needle tube 16 is squeezed by the piston rod and moves along the slide seat 4, and the rubber ball 11 squeezes the connecting frame 12. At this time, the marking liquid inside the rubber ball 11 is sprayed out from the needle tube 16 and sprayed on the eccentric part of the piston rod, thereby marking the eccentric part in time.

[0021] In the utility model, the warning component is a fan blade 13, two needle tubes 16 are fixed with a rack 17 by bolts, two slide seats 4 are rotatably connected with a rotating shaft 14, the circumferential outer wall of the rotating shaft 14 is keyed with a gear 18, and the gear 18 is meshed with the rack 17, and the fan blade 13 is fixed at one end of the rotating shaft 14. When the needle tube 16 moves, the rack 17 follows the movement and causes the gear 18 to rotate, so that the rotating shaft 14 drives the fan blade 13 to rotate, and the inspection personnel can intuitively judge that the piston rod is eccentric through the rotation of the fan blade 13.

[0022] In the utility model, the circumferential outer walls of the two needle tubes 16 are sleeved with tension springs 15, and the two ends of the tension springs 15 are respectively fixed to the needle tubes 16 and the slide seat 4. When the needle tubes 16 are squeezed and moved by the piston rod, the tension springs 15 are forced to contract, and when the piston rod no longer squeezes the needle tubes 16, the tension springs 15 rebound and reset, causing the needle tubes 16 to reset in the opposite direction.

[0023] In the utility model, a bidirectional screw 5 is rotatably connected between the two mounting plates 2, and the bidirectional screw 5 passes through the two slide seats 4 and is threadedly connected to the two slide seats 4. According to the diameter of the piston rod, the bidirectional screw 5 is rotated to move the two slide seats 4 as a whole inward, and the movement of the two slide seats 4 moves the needle tube 16 until the needle tube 16 stops after contacting the piston rod.

[0024] In the utility model, the limiting components are two locking rings 8, and the two mounting plates 2 are both penetrated by push rods 10 that are slidably connected. The two locking rings 8 are respectively fixed to one end of the push rods 10 by bolts. The circumferential outer walls of the two push rods 10 are sleeved with springs 9, and the two ends of the springs 9 are respectively fixed to the push rods 10 and the mounting plates 2. When the hydraulic cylinder body 6 is fixed, the two push rods 10 are moved outward to move the locking rings 8 outward, and the springs 9 are contracted under the force. Then, after the hydraulic cylinder body 6 is placed in the conical tube 7, the push rods 10 are released. At this time, the springs 9 rebound and reset to reset the push rods 10, and the two locking rings 8 lock the hydraulic cylinder body 6 inside it.

[0025] Working principle: When the hydraulic cylinder body 6 needs to be inspected, the two push rods 10 are moved outward to make the lock ring 8 move outward, and the spring 9 is forced to shrink. Then, after the hydraulic cylinder body 6 is placed in the conical tube 7, the push rod 10 is released. At this time, the spring 9 rebounds and resets the push rod 10, and the two lock rings 8 lock the hydraulic cylinder body 6 inside.

[0026] According to the position of the piston rod, the two-way screw rod 5 is rotated to make the two slide seats 4 move inward as a whole, and the movement of the two slide seats 4 makes the needle tube 16 move until the needle tube 16 contacts the piston rod and stops, and the piston rod of the hydraulic cylinder body 6 is controlled to slowly extend, and the piston rod extends and moves along the needle tube 16. If the piston rod is eccentric during the extension process, the piston rod will squeeze the needle tube 16 on one side. At this time, the needle tube 16 is squeezed by the piston rod and moves along the slide seat 4. The tension spring 15 is forced to shrink, and the rack 17 on the needle tube 16 follows the movement and makes the gear 18 rotate, thereby causing the rotating shaft 14 to drive the fan blade 13 to rotate. The inspection personnel intuitively judge that the piston rod is eccentric through the rotation of the fan blade 13, and the movement of the needle tube 16 causes the rubber ball 11 to squeeze the connecting frame 12. At this time, the marking liquid inside the rubber ball 11 is sprayed from the needle tube 16 and sprayed on the eccentric part of the piston rod, thereby timely marking the eccentric part, realizing the detection and marking of the piston rod stroke deviation;

[0027] When the piston rod is normally extended, the piston rod no longer presses the needle tube 16, and the tension spring 15 rebounds and resets. The needle tube 16 is reversely reset so that the rubber ball 11 is no longer pressed against the connecting frame 12, and the marking liquid stops spraying from the needle tube 16.

[0028] In this application, structures and connection relationships that are not described in detail are all prior arts, and their structures and principles are well-known technologies and will not be described in detail here.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A hydraulic cylinder stroke deviation detection device, comprising a bracket (1) and a hydraulic cylinder body (6), characterized in that: The support (1) is fixedly connected with a conical cylinder (7), the hydraulic cylinder body (6) is placed in the conical cylinder (7), the two sides of the support (1) are fixedly connected with mounting plates (2), the mounting plates (2) are provided with a limit assembly for fixing the hydraulic cylinder body (6), a cross plate (3) is fixedly connected between the two mounting plates (2), two slide seats (4) are movably connected to the cross plate (3), and both slide seats (4) are provided with a marking assembly and a warning assembly, so that when the piston rod of the hydraulic cylinder body (6) is extended or retracted, the state of the piston rod displacement can be intuitively judged and marked in time.

2. A hydraulic cylinder stroke deviation detection device according to claim 1, characterized in that: The marking component is a needle tube (16), and the two slide seats (4) are both movably connected with the needle tube (16), and the needle tube (16) is in contact with the piston rod of the hydraulic cylinder body (6). One end of the needle tube (16) is fixedly connected to a rubber ball (11), and one side of the two slide seats (4) is fixedly connected to a connecting frame (12), and the rubber ball (11) is in contact with the connecting frame (12).

3. A hydraulic cylinder stroke deviation detection device according to claim 2, characterized in that: The warning component is a fan blade (13), the two needle tubes (16) are fixedly connected with a rack (17), the two slide seats (4) are movably connected with a rotating shaft (14), the circumferential outer wall of the rotating shaft (14) is fixedly connected with a gear (18), and the gear (18) is meshed with the rack (17), and the fan blade (13) is fixed to one end of the rotating shaft (14).

4. A hydraulic cylinder stroke deviation detection device according to claim 2, characterized in that: The circumferential outer walls of the two needle tubes (16) are movably connected with tension springs (15), and the two ends of the tension springs (15) are respectively fixed to the needle tubes (16) and the sliding seat (4).

5. The stroke deviation detection device of a hydraulic cylinder according to claim 1, characterized in that: A bidirectional screw rod (5) is movably connected between the two mounting plates (2), and the bidirectional screw rod (5) passes through the two slide seats (4) and is movably connected to the two slide seats (4).

6. A hydraulic cylinder stroke deviation detection device according to claim 1, characterized in that: The limiting components are two locking rings (8), and the two mounting plates (2) are both movably connected with a push rod (10). The two locking rings (8) are respectively fixedly connected to one end of the push rod (10), and the circumferential outer walls of the two push rods (10) are both movably connected with a spring (9), and the two ends of the spring (9) are respectively fixed to the push rod (10) and the mounting plate (2).

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