External stay wire displacement sensor

Abstract

The utility model relates to the technical field of sensors, in particular to an external stay wire displacement sensor, which comprises a sensor body, a stay wire end is arranged on the outer wall of the sensor body, a stay rope is arranged in the stay wire end, slots which are symmetrically distributed are arranged on the outer wall of the stay wire end, the slots are connected with a protective sleeve in a sliding manner, and the protective sleeve is connected with the sensor body. The head end of the pull rope is fixedly connected with a connecting column, and the connecting column is connected with a circular ring hook through a quick replacement structure. According to the utility model, through the arrangement of the quick replacement structure, when the circular ring hook is damaged, the screw rod can be screwed to move upwards, under the action of the spring, the limiting cylinder leaves from the limiting hole and retracts into the connecting column, and the circular ring hook can be taken out and replaced by a new circular ring hook after the limitation is lost; therefore, the damaged hook can be quickly replaced, the sensor can be continuously used, the service life is greatly prolonged, and the protective sleeve can protect the sensor body from being damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to an external pull-wire displacement sensor. Background Art

[0002] An external wire displacement sensor is a measuring device that converts mechanical motion into an electrical signal that can be measured, recorded, or transmitted. Its sophisticated structure combines the advantages of both angle sensors and linear displacement sensors, resulting in a small installation footprint, compact structure, large measuring range, and high accuracy. Travels range from several hundred millimeters to tens of meters. External wire displacement sensors offer numerous advantages, including high measurement accuracy, excellent reliability, long life, and minimal maintenance. They also feature a variety of output signal modes to meet diverse application requirements. They are widely used in automation equipment, lifting machinery, engineering vehicles, hydraulic gates, linear guide systems, hydraulic cylinder systems, testing machines, telescopic systems, warehouse positioning, pressure machinery, papermaking machinery, textile machinery, sheet metal machinery, packaging machinery, printing machinery, level controllers, construction machinery, and many other fields, serving as an ideal solution for length or displacement measurement and positioning.

[0003] Common external pull-wire displacement sensors on the market all install the sensor in a fixed position, tie the pull rope to the moving object through a hook, and then calculate the distance by the extension and contraction of the pull rope. However, the hook is prone to breakage after long-term use. The hook cannot be hung on the object, and the damaged hook cannot be replaced, making the sensor unusable. In addition, if the hook suddenly breaks during use, the pull rope will be suddenly retracted. The impact force during retraction will directly act on the sensor body, causing damage to the sensor body. Utility Model Content

[0004] The purpose of the utility model is to solve the problem that the existing hook is prone to breakage after long-term use, the hook cannot be hung on an object, and the damaged hook cannot be replaced, which makes the sensor unusable. In addition, if the hook suddenly breaks during use, the pull rope will be suddenly retracted. The impact force during the retraction will directly act on the sensor body, causing damage to the sensor body. An external pull-wire displacement sensor is proposed.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] An external pull-wire displacement sensor includes a sensor body, a pull-wire end is provided on the outer wall of the sensor body, a pull-wire end is provided inside the pull-wire end, symmetrically distributed slots are opened on the outer wall of the pull-wire end, a protective cover is slidably connected to the slots, the head end of the pull-wire is fixedly connected to a connecting column, and the connecting column is connected to a ring hook through a quick-change structure.

[0007] Preferably, the protective cover includes an upper protective shell, a lower protective shell, an insert, symmetrically distributed protruding blocks, bolts, and nuts. The insert is fixedly connected to the inner wall of the upper protective shell, and the insert is fixedly connected to the inner wall of the lower protective shell. The insert in the upper protective shell and the insert in the lower protective shell are symmetrically distributed.

[0008] Preferably, the protruding block is fixedly connected to the outer wall of the upper protective shell, the protruding block is fixedly connected to the outer wall of the lower protective shell, the bolt is threadedly connected to the nut, a hole is opened on the outer wall of the protruding block, the bolt is slidably connected to the hole, and the upper protective shell is connected to the lower protective shell by the bolt and the nut.

[0009] Preferably, the quick-change structure includes a T-slot, a spiral rod, a moving block, a symmetrically distributed moving trapezoidal platform, a limiting cylinder, a spring, and a limiting hole. The T-slot is arranged inside the connecting column, the spiral rod is threadedly connected to the outer wall of the connecting column, the moving block is slidingly connected to the T-slot, and the spiral rod is slidingly connected to one end of the moving block.

[0010] Preferably, the movable trapezoidal platform is slidably connected to the inner wall of the T-slot, the limiting cylinder is fixedly connected to the outer wall of the movable trapezoidal platform, one end of the spring is fixedly connected to the outer wall of the movable trapezoidal platform, the other end of the spring is fixedly connected to the inner wall of the T-slot, and the other end of the movable block is slidably connected to the outer wall of the movable trapezoidal platform.

[0011] Preferably, the limiting hole is provided on the inner wall of the ring hook, and the limiting cylinder is slidably connected to the limiting hole.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. When the utility model is in use, the quick replacement structure can be set up so that when the ring hook is damaged, it can be moved upward by twisting the spiral rod. Under the action of the spring, the limiting cylinder leaves the limiting hole and is retracted into the connecting column. After the restriction is lost, the ring hook can be taken out and replaced with a new one. In this way, the damaged hook can be quickly replaced, so that the sensor can continue to be used and its service life is greatly increased.

[0014] 2. When the utility model is in use, the protective cover can be set so that when the pull rope is suddenly retracted, the protective cover is set on the outside of the pull rope end to protect the pull rope end from being damaged by the impact force of the pull rope, thereby protecting the sensor body from damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of an external wire displacement sensor proposed by the utility model;

[0016] Figure 2 This is a schematic diagram of the three-dimensional structure of a protective cover of an external wire displacement sensor proposed by the present invention;

[0017] Figure 3 This is a schematic diagram of a half-cutaway three-dimensional structure of a protective cover of an external wire displacement sensor proposed in the present invention;

[0018] Figure 4 This is a schematic diagram of a transverse half-section three-dimensional structure of a connecting column of an external wire displacement sensor proposed by the present invention;

[0019] Figure 5 This is a vertical half-section schematic diagram of the three-dimensional structure of the connecting column of an external wire displacement sensor proposed by the utility model;

[0020] Figure 6 This is a schematic diagram of a half-section three-dimensional structure of a circular hook of an external pull-wire displacement sensor proposed by the utility model.

[0021] In the figure: 1. Sensor body; 2. Pull wire end; 3. Pull rope; 4. Slot; 5. Protective cover; 6. Connecting column; 7. Ring hook; 8. Upper protective shell; 9. Lower protective shell; 10. Insert block; 11. Protruding block; 12. Bolt; 13. Nut; 14. T-slot; 15. Screw rod; 16. Moving block; 17. Moving trapezoidal stage; 18. Limiting cylinder; 19. Spring; 20. Limiting hole. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] Reference Figures 1-6 An external wire displacement sensor includes a sensor body 1, a wire end 2 is provided on the outer wall of the sensor body 1, a pull rope 3 is provided inside the wire end 2, and a symmetrically distributed slot 4 is opened on the outer wall of the wire end 2. A protective cover 5 is slidably connected to the slot 4. The head end of the pull rope 3 is fixedly connected to a connecting column 6, and the connecting column 6 is connected to a ring hook 7 through a quick replacement structure.

[0024] It should be noted that the sensor body 1 and the ring hook 7 are existing technologies. The specific model specifications need to be selected and determined based on the actual specifications of the device. The specific selection calculation method adopts the existing technology in this field, so it will not be repeated.

[0025] Furthermore, the protective cover 5 includes an upper protective shell 8, a lower protective shell 9, an insert 10, symmetrically distributed protruding blocks 11, bolts 12, and nuts 13. The insert 10 is fixedly connected to the inner wall of the upper protective shell 8, and the insert 10 is fixedly connected to the inner wall of the lower protective shell 9. The insert 10 in the upper protective shell 8 and the insert 10 in the lower protective shell 9 are symmetrically distributed.

[0026] The position, shape and size of the insert block 10 are all adapted to those of the slot 4 , and the insert block 10 can be inserted into the slot 4 .

[0027] Furthermore, the protruding block 11 is fixedly connected to the outer wall of the upper protective shell 8, the protruding block 11 is fixedly connected to the outer wall of the lower protective shell 9, the bolt 12 is threadedly connected to the nut 13, a hole is opened on the outer wall of the protruding block 11, the bolt 12 is slidably connected to the hole, and the upper protective shell 8 is connected to the lower protective shell 9 through the bolt 12 and the nut 13.

[0028] The outer walls of the upper protective shell 8 and the lower protective shell 9 are both provided with semicircular arc grooves, which together form a circular hole that is just large enough for the pull rope 3 to pass through.

[0029] Furthermore, the quick replacement structure includes a T-slot 14, a spiral rod 15, a moving block 16, a symmetrically distributed moving trapezoidal platform 17, a limiting cylinder 18, a spring 19, and a limiting hole 20. The T-slot 14 is arranged inside the connecting column 6, the spiral rod 15 is threadedly connected to the outer wall of the connecting column 6, the moving block 16 is slidingly connected to the T-slot 14, and the spiral rod 15 is slidingly connected to one end of the moving block 16.

[0030] The bottom end of the spiral rod 15 is conical, and one end of the moving block 16 is provided with a 45-degree slope. The outer wall of the bottom end of the spiral rod 15 abuts against the slope, so that when the spiral rod 15 moves downward, it can push the moving block 16 to move rightward.

[0031] Furthermore, the movable trapezoidal platform 17 is slidably connected to the inner wall of the T-slot 14, the limiting cylinder 18 is fixedly connected to the outer wall of the movable trapezoidal platform 17, one end of the spring 19 is fixedly connected to the outer wall of the movable trapezoidal platform 17, the other end of the spring 19 is fixedly connected to the inner wall of the T-slot 14, and the other end of the movable block 16 is slidably connected to the outer wall of the movable trapezoidal platform 17.

[0032] Among them, the other end of the moving block 16 is triangular in shape, and the moving trapezoidal platform 17 is provided with a slope. The other end of the moving block 16 is against the slopes of the moving trapezoidal platforms 17 on both sides, so that when the moving block 16 moves to the right, it can push the moving trapezoidal platform 17 to extend toward the outer walls of the connecting column 6 on both sides.

[0033] Furthermore, a limiting hole 20 is provided on the inner wall of the ring hook 7 , and the limiting cylinder 18 is slidably connected to the limiting hole 20 .

[0034] Among them, one end of the limiting cylinder 18 passes through the outer wall of the connecting column 6 and is slidably connected. The position and thickness of the limiting cylinder 18 are adapted to the position and thickness of the limiting hole 20, so that the limiting cylinder 18 can be inserted into the limiting hole 20.

[0035] Working principle: When installing the protective cover 5, you can first align the plug blocks 10 on the upper protective shell 8 and the lower protective shell 9 with the slots 4 on the wire pulling end 2 and then align them with the protruding blocks 11 on the upper protective shell 8 and the lower protective shell 9, and use bolts 12 and nuts 13 to connect the upper protective shell 8 and the lower protective shell 9. This completes the installation of the protective cover 5.

[0036] Then, when the ring hook 7 is damaged and needs to be replaced, the spiral rod 15 can be used to move upward with a tool. After losing the restriction, the movable trapezoidal platforms 17 on both sides are pulled inward under the action of the spring 19. The movable trapezoidal platforms 17 drive the limiting cylinder 18 to move toward the inside of the connecting column 6, so that the limiting cylinder 18 leaves the limiting hole 20, and the restriction of the limiting cylinder 18 is lost. The ring hook 7 can be taken out, and then the new ring hook 7 is inserted into the connecting column 6. Then, the spiral rod 15 is twisted downward again to push the moving block 16 to move to the right. The moving block 16 pushes the movable trapezoidal platform 17 to move to both sides. The movable trapezoidal platform 17 pushes the limiting cylinder 18 to extend out of the connecting column 6, and then the limiting cylinder 18 enters the limiting hole 20, completing the restriction of the ring hook 7. The damaged hook can be quickly replaced, so that the sensor can continue to be used, the service life is greatly increased, and the sensor body 1 is protected from damage.

[0037] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An external wire displacement sensor, comprising a sensor body (1), characterized in that: The outer wall of the sensor body (1) is provided with a pull wire end (2), a pull rope (3) is provided inside the pull wire end (2), the outer wall of the pull wire end (2) is provided with symmetrically distributed slots (4), the slots (4) are slidably connected to a protective cover (5), the head end of the pull rope (3) is fixedly connected to a connecting column (6), and the connecting column (6) is connected to a ring hook (7) through a quick replacement structure.

2. The external wire displacement sensor according to claim 1, characterized in that: The protective cover (5) comprises an upper protective shell (8), a lower protective shell (9), an insert (10), symmetrically distributed protruding blocks (11), bolts (12), and nuts (13); the insert (10) is fixedly connected to the inner wall of the upper protective shell (8); the insert (10) is fixedly connected to the inner wall of the lower protective shell (9); and the insert (10) in the upper protective shell (8) and the insert (10) in the lower protective shell (9) are symmetrically distributed.

3. The external wire displacement sensor according to claim 2, characterized in that: The protruding block (11) is fixedly connected to the outer wall of the upper protective shell (8), the protruding block (11) is fixedly connected to the outer wall of the lower protective shell (9), the bolt (12) is threadedly connected to the nut (13), a hole is opened on the outer wall of the protruding block (11), the bolt (12) is slidably connected to the hole, and the upper protective shell (8) is connected to the lower protective shell (9) through the bolt (12) and the nut (13).

4. The external wire displacement sensor according to claim 1, characterized in that: The quick-change structure comprises a T-slot (14), a spiral rod (15), a moving block (16), a symmetrically distributed moving trapezoidal platform (17), a limiting cylinder (18), a spring (19), and a limiting hole (20); the T-slot (14) is arranged inside the connecting column (6); the spiral rod (15) is threadedly connected to the outer wall of the connecting column (6); the moving block (16) is slidably connected to the T-slot (14); and the spiral rod (15) is slidably connected to one end of the moving block (16).

5. The external wire displacement sensor according to claim 4, characterized in that: The movable trapezoidal platform (17) is slidably connected to the inner wall of the T-slot (14), the limiting cylinder (18) is fixedly connected to the outer wall of the movable trapezoidal platform (17), one end of the spring (19) is fixedly connected to the outer wall of the movable trapezoidal platform (17), the other end of the spring (19) is fixedly connected to the inner wall of the T-slot (14), and the other end of the movable block (16) is slidably connected to the outer wall of the movable trapezoidal platform (17).

6. The external wire displacement sensor according to claim 5, characterized in that: The limiting hole (20) is arranged on the inner wall of the ring hook (7), and the limiting cylinder (18) is slidably connected to the limiting hole (20).

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