Simple buffer mechanism for stay wire sensor

Abstract

The utility model relates to the technical field of stay wire sensors, and aims to solve the problem that the reliability and the service life of the sensor are affected due to the fact that breakage of a stay wire cable is difficult to effectively prevent when the conventional stay wire sensor faces abnormal conditions such as stay wire loosening. Therefore, the utility model provides the simple buffer mechanism for the stay wire sensor, the stay wire sensor comprises a stay wire and a wire outlet, the simple buffer mechanism comprises a hollow shell, an elastic component and a fixing block, the fixing block is fixed on the stay wire, and the stay wire penetrates through the hollow shell; the elastic component and the fixing block are both arranged in the hollow shell, and the elastic component is arranged to provide buffering for the fixing block under the conditions that the stay wire is retracted into the wire outlet and the hollow shell collides with the wire outlet. According to the utility model, the contact time of the fixing block at the tail end of the stay wire and the wire outlet can be prolonged, so that the impact strength is reduced, wire breakage is prevented, the original wire diameter and preset tension are not changed, the use convenience and the product appearance are not influenced, and the workload of operators is not increased.

Description

Technical Field

[0001] The utility model relates to the technical field of pull-wire sensors, in particular to a simple buffer mechanism for pull-wire sensors. Background Art

[0002] As a commonly used device for measuring displacement changes, the draw-wire sensor is widely used in various industries, scientific research and daily life. It senses and measures the displacement of objects by stretching and retracting the wire, and has the advantages of simple structure, easy use and low cost. However, in practical applications, the draw-wire sensor also faces some challenges and problems, especially when the wire is loose or other abnormal conditions occur, which may cause the wire cable to break, thus affecting the normal operation and service life of the sensor.

[0003] In the traditional design of the cable sensor, the cable itself has a certain pulling force. When the cable becomes loose or in other abnormal situations, the cable will be quickly retracted due to the pulling force, and the fixed block at the end of the cable will also be quickly retracted. In this process, the speed of the fixed block will gradually increase, and when it is fully retracted, its speed has reached a relatively high level. At this time, the fixed block will collide with the sensor outlet, causing its speed to drop to zero instantly. This instantaneous speed change will cause the cable to be subjected to greater stress, which may lead to a break at the connection between the cable and the fixed block.

[0004] To solve this problem, some existing technical solutions have adopted the method of thickening the cable or reducing the tension. Thickening the cable can increase the strength of the cable, making it more able to withstand the stress during impact; reducing the tension can reduce the acceleration during winding and the impact force during impact. However, these methods all have certain limitations. Thickening the cable will increase the gravity of the cable, which may cause the cable to bend more under the influence of greater gravity, affecting the measurement accuracy and user experience of the sensor; reducing the tension may cause the cable to bend more due to insufficient tension, which also affects the performance and use of the sensor.

[0005] Another solution is to add a wristband and connect the fixed block at the end of the cable through a separate cable. Before use, the operator puts the wristband on his hand and then pulls out the cable, which can prevent the cable from being quickly reeled in and hit due to slipping out of his hand. However, this method increases the workload of the operator and the complexity of use, and may not be popular in actual operation.

[0006] Another method is to add a buffer component to extend the contact time between the fixed block at the end of the cable and the sensor outlet, thereby reducing the impact intensity. This method can effectively prevent the cable from breaking, but the design of the buffer mechanism needs to be very careful, otherwise it may introduce other problems, such as inconvenience in use and affected appearance.

[0007] In summary, existing wire sensors still have some shortcomings and challenges when dealing with abnormal situations such as loose wires.

[0008] In view of this, the art needs a simple buffer mechanism for a pull-wire sensor to solve the above technical problems. Utility Model Content

[0009] (I) Purpose of the utility model

[0010] The utility model aims to solve the problem in the prior art that when a pull-wire sensor faces an abnormal situation such as a loose pull wire, it is difficult to effectively prevent the pull-wire cable from breaking, thereby affecting the reliability and service life of the sensor.

[0011] (II) Technical solution

[0012] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0013] The utility model provides a simple buffer mechanism for a pull-wire sensor, the pull-wire sensor comprises a pull-wire and a wire outlet, the simple buffer mechanism comprises a hollow shell, an elastic component and a fixed block, the fixed block is fixed on the pull-wire, and the pull-wire passes through the hollow shell; the elastic component and the fixed block are both arranged inside the hollow shell, and the elastic component is arranged to provide buffering for the fixed block when the pull-wire is retracted into the wire outlet and the hollow shell hits the wire outlet.

[0014] Preferably, the elastic member is arranged on a side of the fixing block close to the wire outlet.

[0015] Preferably, the elastic member is arranged on a side of the fixing block away from the wire outlet.

[0016] Preferably, the elastic member comprises a first elastic member and a second elastic member, the first elastic member is arranged on a side of the fixing block close to the wire outlet, and the second elastic member is arranged on a side of the fixing block away from the wire outlet.

[0017] Preferably, a detachable movable cover is provided at one end of the hollow housing away from the wire outlet;

[0018] A first opening is provided at one end of the hollow shell body close to the wire outlet, a second opening is provided on the movable cover, and the pull wire passes through the first opening and the second opening.

[0019] Preferably, the elastic member is a cylindrical spring, and the pull wire passes through a central portion of the cylindrical spring.

[0020] Preferably, the elastic member is a conical spring, and the pull wire passes through a central portion of the conical spring.

[0021] Preferably, the hollow housing has a cylindrical hollow cavity, and the diameter of the hollow cavity is greater than or equal to the maximum diameter of the conical spring.

[0022] Preferably, the fixing block is cylindrical in shape, and there is a gap between the outer wall of the fixing block and the inner wall of the hollow cavity.

[0023] Preferably, the diameter of the conical spring gradually increases along the direction in which the pulling wire is retracted into the wire outlet.

[0024] The utility model sets a fixed block in a hollow shell, and sets an elastic member in the hollow shell that can play a buffering role for the fixed block, so that when the wire sensor retracts to the wire outlet due to the wire loosening, the hollow shell can first contact the wire outlet, so that the speed of the hollow shell changes instantly, but the fixed block still has a relatively high speed. Under the action of inertia and the traction of the wire, the fixed block will continue to be accelerated and pulled toward the wire outlet. However, since the speed of the hollow shell has dropped to zero, the fixed block will deform the elastic member and slow down under the action of inertia and wire pulling force (mainly the action of inertia) until the speed of the fixed block also drops to zero. This process plays a buffering role.

[0025] Compared with the prior art, the utility model provides a simple buffer mechanism for a pull-wire sensor, which has the following beneficial effects:

[0026] Only a simple buffer mechanism is added to prolong the contact time between the fixed block at the end of the pull wire and the outlet of the pull wire sensor, thereby reducing the impact intensity and preventing wire breakage. The mechanism has the following characteristics:

[0027] (1) Do not change the original wire diameter and preset tension;

[0028] (2) It does not affect the ease of use, does not increase the workload of operators, and does not affect the appearance of the product;

[0029] (3) Does not affect the normal operation of the sensor;

[0030] (4) Fewer parts are added, only a shell and an elastic part are added, and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a structural schematic diagram of a simple buffer mechanism for a wire-drawing sensor proposed by the utility model;

[0032] In the figure:

[0033] 1. Hollow shell;

[0034] 2. Elastic components;

[0035] 3. Fixed block;

[0036] 4. Movable cover;

[0037] 5. Pull the wire;

[0038] 6. First opening;

[0039] 7. Second opening;

[0040] 8. Wire outlet;

[0041] 9. Pull wire sensor. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present invention will be described clearly and completely below 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 of the embodiments.

[0043] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0044] Based on the background technology, it is difficult to effectively prevent the breakage of the pull-wire sensor in the prior art when facing abnormal situations such as the pull-wire being loosened, which affects the reliability and service life of the sensor. The utility model provides a simple buffer mechanism for the pull-wire sensor, which is intended to extend the contact time between the fixed block at the end of the pull-wire and the sensor outlet, thereby reducing the impact intensity to prevent the wire from breaking, and has the advantages of not changing the original wire diameter and the preset tension, not affecting the convenience of use, not affecting the product appearance, and not increasing the workload of the operator.

[0045] Reference Figure 1 The wire sensor 9 of the utility model includes a wire 5 and a wire outlet 8, and the simple buffer mechanism includes a hollow shell 1, an elastic member 2 and a fixed block 3, wherein the fixed block 3 is fixed on the wire 5, and the wire 5 passes through the hollow shell 1; the elastic member 2 and the fixed block 3 are both arranged inside the hollow shell 1, and the elastic member 2 is arranged to provide buffering for the fixed block 3 when the wire 5 is retracted into the wire outlet 8 and the hollow shell 1 hits the wire outlet 8. Among them, the elastic member 2 can be a spring, or other elastic materials such as polyurethane, but it is best to be processed into a special elastic structure to reduce weight, and those skilled in the art can flexibly set the specific structure of the elastic member 2 in practical applications.

[0046] In the present invention, it should be noted that when the pull wire 5 is wound, the fixed block 3 is quickly pulled back by the pull wire 5, and at the same time, the elastic member 2 is synchronously pulled back together with the hollow housing 1. Obviously, since the two ends of the elastic member 2 are not subjected to tension or pressure, before contacting the outlet 8 of the sensor, the spring is basically in a natural state and is basically not compressed or stretched.

[0047] In an alternative scenario, as Figure 1 In the structure shown, the elastic member 2 is arranged on the side of the fixed block 3 close to the wire outlet 8. This arrangement makes the elastic member 2 closer to the wire outlet 8. When the wire sensor 9 retracts into the wire outlet 8 due to the wire loosening, the hollow shell 1 can contact the wire outlet 8 first. At this time, the speed of the hollow shell 1 changes instantly, but the fixed block 3 still has a relatively high speed. Under the action of inertia and the traction of the wire 5, the fixed block 3 will continue to be accelerated and pulled toward the wire outlet 8. However, since the speed of the hollow shell 1 has dropped to zero, the fixed block 3 will compress the elastic member 2 (the elastic member 2 provides a rebound force to the fixed block 3) and decelerate under the action of inertia and the pulling force of the wire 5 (mainly the action of inertia) until the speed of the fixed block 3 also drops to zero. This process plays a buffering role.

[0048] In another optional situation, the elastic member 2 is arranged on the side of the fixed block 3 away from the wire outlet 8. This arrangement makes the elastic member 2 farther away from the wire outlet 8. At this time, the elastic member 2 can be connected to the fixed block 3 by means of snap-on, screw-on and / or welding. When the wire sensor 9 retracts into the wire outlet 8 due to loose wire, the hollow shell 1 can contact the wire outlet 8 first. At this time, the speed of the hollow shell 1 changes instantly, but the fixed block 3 still has a relatively high speed. Under the action of inertia and the traction of the wire 5, the fixed block 3 will continue to be accelerated and pulled toward the wire outlet 8. However, since the speed of the hollow shell 1 has dropped to zero, the fixed block 3 will be stretched (the elastic member 2 provides a pulling force to the fixed block 3) and decelerated under the action of inertia and the pulling force of the wire 5 (mainly the action of inertia) until the speed of the fixed block 3 also drops to zero. This process plays a buffering role.

[0049] In another optional situation, the elastic member 2 includes a first elastic member and a second elastic member, the first elastic member is arranged on the side of the fixed block 3 close to the outlet 8, and the second elastic member is arranged on the side of the fixed block 3 away from the outlet 8. At this time, the second elastic member can be connected to the fixed block 3 by means of clamping, screwing and / or welding, so that when the wire sensor 9 is loose and retracts to the outlet 8, the hollow shell 1 can first contact the outlet 8. At this time, the speed of the hollow shell 1 changes instantly, but the fixed block 3 still has a high speed. Under the action of inertia and the traction of the wire 5, the fixed block 3 will continue to be accelerated and pulled toward the outlet 8. However, since the speed of the hollow shell 1 has dropped to zero, the fixed block 3 will decelerate under the action of inertia and the pulling force of the wire 5 (mainly the action of inertia) to compress the first elastic member (the first elastic member provides rebound force to the fixed block 3) and stretch the second elastic member (the second elastic member provides pulling elastic force to the fixed block 3) until the speed of the fixed block 3 is also reduced to zero. This process plays a buffering role.

[0050] Preferably, a removable movable cover 4 is provided at one end of the hollow housing 1 away from the outlet 8; a first opening 6 is provided at one end of the hollow housing 1 close to the outlet 8, and a second opening 7 is provided on the movable cover 4, and the pull wire 5 passes through the first opening 6 and the second opening 7. In the above, the movable cover 4 is preferably connected to the hollow housing 1 by means of snap-fitting or plug-in, and of course, it can also be connected by means of screwing, and those skilled in the art can flexibly set this, and the shape of the first opening 6 and the second opening 7 can be circular, or elliptical or square, and this can be flexibly set in the art, and of course, it is most preferred to be circular, so as to avoid scratching the pull wire 5.

[0051] In the utility model, when the elastic member 2 adopts a spring, the spring can be a cylindrical spring, and the pull wire 5 passes through the central part of the cylindrical spring. Of course, more preferably, the spring is a tower spring, and the pull wire 5 passes through the central part of the tower spring. The use of a tower spring can reduce the length in the direction of the pull wire 5, so that appropriate weight reduction can be achieved. Alternatively, the spring can also be replaced by a reed or other elastic component. When the spring is a cylindrical spring, the hollow shell 1 preferably has a cylindrical hollow cavity, and the diameter of the hollow cavity is greater than or equal to the diameter of the cylindrical spring. When the spring is a tower spring, the hollow shell 1 preferably has a cylindrical hollow cavity, and the diameter of the hollow cavity is greater than or equal to the maximum diameter of the tower spring. The diameter of the tower spring preferably increases gradually along the direction in which the pull wire 5 is retracted into the outlet 8. Thereby ensuring that the spring can be accommodated and placed in the hollow shell 1.

[0052] In the above, the shape of the fixing block 3 is preferably cylindrical, and there is a gap between the outer wall of the fixing block 3 and the inner wall of the hollow cavity, so that the fixing block 3 can move freely in the hollow shell 1.

[0053] 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 simple buffer mechanism for a pull-wire sensor, characterized in that: The pull-wire sensor (9) comprises a pull-wire (5) and a wire outlet (8); the simple buffer mechanism comprises a hollow shell (1), an elastic member (2) and a fixing block (3); the fixing block (3) is fixed on the pull-wire, and the pull-wire passes through the hollow shell (1); The elastic component (2) and the fixing block (3) are both arranged inside the hollow shell (1), and the elastic component (2) is arranged to provide a buffer for the fixing block (3) when the pull wire is retracted into the wire outlet (8) and the hollow shell (1) collides with the wire outlet (8).

2. The simple buffer mechanism according to claim 1, characterized in that: The elastic component (2) is arranged on a side of the fixing block (3) close to the wire outlet (8).

3. The simple buffer mechanism according to claim 1, characterized in that: The elastic component (2) is arranged on a side of the fixing block (3) away from the wire outlet (8).

4. The simple buffer mechanism according to claim 1, characterized in that: The elastic component (2) comprises a first elastic member and a second elastic member, the first elastic member being arranged on a side of the fixing block (3) close to the wire outlet (8), and the second elastic member being arranged on a side of the fixing block (3) away from the wire outlet (8).

5. The simple buffer mechanism according to claim 1, characterized in that: A detachable movable cover (4) is provided at one end of the hollow housing (1) away from the wire outlet (8); A first opening (6) is provided at one end of the hollow shell (1) close to the wire outlet (8), a second opening (7) is provided on the movable cover (4), and the pull wire passes through the first opening (6) and the second opening (7).

6. The simple buffer mechanism according to claim 1, characterized in that: The elastic component (2) is a cylindrical spring, and the pull wire passes through the central part of the cylindrical spring.

7. The simple buffer mechanism according to claim 1, characterized in that: The elastic component (2) is a conical spring, and the pull wire passes through the central part of the conical spring.

8. The simple buffer mechanism according to claim 7, characterized in that: The hollow housing (1) has a cylindrical hollow cavity, the diameter of which is greater than or equal to the maximum diameter of the conical spring.

9. The simple buffer mechanism according to claim 8, characterized in that: The fixing block (3) is cylindrical in shape, and there is a gap between the outer wall of the fixing block (3) and the inner wall of the hollow cavity.

10. The simple buffer mechanism according to claim 7, characterized in that: The diameter of the conical spring gradually increases along the direction in which the pulling wire is retracted into the wire outlet (8).

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