阅读说明：本技术 一种防止接近开关震动失稳的方法 (Method for preventing proximity switch from being unstable due to vibration ) 是由 孙承玉 于 2021-01-07 设计创作，主要内容包括：一种防止接近开关震动失稳的方法,在使用接近开关时,通过将接近开关固定装置和接近开关触发装置集成于同一个接近开关座中使固定在接近开关固定装置上的接近开关与接近开关触发装置的触发板的位置相对固定,安装在设备基体上的接近开关座在设备振动作用下接近开关与触发板的相对位置不会发生变化。该防止接近开关震动失稳的方法使接近开关不会受到设备振动的影响,接近开关与检测板的距离不会发生改变,通过改变接近开关的触发方式实现了接近开关与检测板的距离的相对稳定,同时通过设置调整机构使得接近开关与检测板距离可调,能适应不同型号的接近开关。(A method for preventing the vibration instability of a proximity switch is characterized in that when the proximity switch is used, a proximity switch fixing device and a proximity switch triggering device are integrated in the same proximity switch seat, so that the positions of a proximity switch fixed on the proximity switch fixing device and a triggering plate of the proximity switch triggering device are relatively fixed, and the relative positions of the proximity switch and the triggering plate cannot be changed under the vibration action of equipment by the proximity switch seat arranged on an equipment base body. The method for preventing the proximity switch from shaking and destabilizing enables the proximity switch not to be influenced by the vibration of equipment, the distance between the proximity switch and the detection board can not be changed, the relative stability of the distance between the proximity switch and the detection board is realized by changing the triggering mode of the proximity switch, and meanwhile, the distance between the proximity switch and the detection board is adjustable by arranging an adjusting mechanism, so that the proximity switch can adapt to the proximity switches of different models.)

1. A method for preventing the shock instability of a proximity switch is characterized in that when the proximity switch (3) is used, a proximity switch fixing device and a proximity switch triggering device are integrated into the same proximity switch seat, so that the position of the proximity switch (3) fixed on the proximity switch fixing device and the position of a triggering plate of the proximity switch triggering device are relatively fixed, and the relative position of the proximity switch (3) and the triggering plate cannot change under the action of equipment vibration of a proximity switch seat arranged on an equipment base body (1);

when the moving direction of the moving component (4) is consistent with the moving direction of the trigger plate, the moving component (4) presses down the trigger plate to enable the trigger plate to enter the detection range of the proximity switch (3) for detecting the limit position state of the moving component (4);

when the moving direction of the moving component (4) is vertical to the moving direction of the trigger plate, the moving component (4) firstly gradually presses down the trigger plate to enable the trigger plate to enter the detection range of the proximity switch (3), and along with the continuous movement of the moving component (4), the trigger plate gradually leaves the detection range of the proximity switch (3) under the action of the resetting device of the trigger plate to be used for detecting the position state of the moving component (4).

2. The method for preventing the shock instability of the proximity switch according to claim 1, wherein the trigger plate is only moved up and down along the guide device in the proximity switch seat by arranging the guide device of the trigger plate in the proximity switch seat, so that the movement of the trigger plate in the left-right direction is avoided, and the horizontal linear distance of the trigger plate of the proximity switch (3) is not changed.

3. The method of claim 1, wherein the trigger plate is prevented from being separated from the proximity switch base by providing a snap-fit device between the trigger plate and the proximity switch base.

4. The method for preventing vibration instability of a proximity switch as claimed in claim 3, wherein the horizontal linear distance between the trigger plate and the proximity switch is adjusted to adapt to the proximity switch types in different detection ranges by adjusting the position of the proximity switch trigger device in the proximity switch base when the trigger plate is installed.

5. Method for preventing shock destabilization of a proximity switch according to claim 2, characterized in that increasing the frictional resistance between said trigger plate and the guiding means of said trigger plate ensures that the trigger plate does not move spontaneously downwards due to the vibration of the device in the non-triggered state of the moving part (4).

Technical Field

The invention relates to the technical field of contactless electronic switches, in particular to a method for preventing a proximity switch from being unstable due to vibration.

Background

The proximity switch is also called contactless proximity switch, and is an ideal electronic switching value sensor. When the metal detection body approaches to the induction area of the switch, the switch can send out an electric command rapidly without contact, pressure and spark, and accurately reflect the position and the stroke of the motion mechanism. It is widely used in machine tool, metallurgy, chemical industry, light textile and printing industries. The automatic control system can be used as the links of limiting, counting, positioning control, automatic protection and the like. The proximity switch is a position switch which can be operated without mechanical direct contact with a moving part, and when the sensing surface of the object proximity switch reaches an action distance, the switch can be actuated without mechanical contact and any pressure applied, so that a direct current electric appliance is driven or a control instruction is provided for a computer (plc) device. The approach switch is a switch type sensor (i.e. a non-contact switch), which has the characteristics of a travel switch and a microswitch, and has the characteristics of sensing performance, reliable action, stable performance, fast frequency response, long service life, strong anti-interference capability and the like, and has the characteristics of water resistance, shock resistance, corrosion resistance and the like. The product has inductance type, capacitance type, Hall type, AC type and DC type.

Most of mechanical equipment needs to complete actions through the cooperative matching of various mechanisms, and the state information of different parts is acquired through the proximity switch, so that the proximity switch has a wide application range in the modern mechanical equipment industry. Fig. 1 is a state diagram showing a typical proximity switch in the prior art. As shown, the proximity switch 3 is fixed on the bracket 2, the bracket 2 is fixed on the equipment base body 1, the moving component 4 carries the detection plate 5 to move, and when the detection plate 5 enters the detection range of the proximity switch 3, the proximity switch 3 sends a signal to a control system of the equipment. In some work, the device base body 1 or the moving part 4 can be influenced by the vibration of the device, so that the distance between the detection plate 5 and the proximity switch 3 is changed, the signal of the proximity switch 3 is flickered, and the real state of the moving part 4 cannot be reflected. In particular, in some large-scale automatic production lines, production pause often occurs due to sudden change of signals of the proximity switch 3, and the efficiency and stability of automatic production are severely limited.

Disclosure of Invention

The invention provides a method for preventing a proximity switch from being unstable due to vibration, which can ensure that the proximity switch is not influenced by the vibration of equipment, can ensure that the distance between the proximity switch and a proximity switch trigger plate is not changed, can realize the relative stability of the distance between the proximity switch and a detection plate by changing the trigger mode of the proximity switch, and can adapt to the proximity switches of different models by arranging an adjusting mechanism to ensure that the distance between the proximity switch and the detection plate is adjustable.

The purpose of the invention is realized by the following technical scheme.

A method for preventing the vibration instability of a proximity switch comprises the steps that when the proximity switch is used, a proximity switch fixing device and a proximity switch triggering device are integrated into the same proximity switch seat, so that the positions of a proximity switch fixed on the proximity switch fixing device and a triggering plate of the proximity switch triggering device are relatively fixed, and the relative positions of the proximity switch and the triggering plate cannot be changed under the vibration effect of equipment by a proximity switch seat arranged on an equipment base body;

when the moving direction of the moving component is consistent with the moving direction of the trigger plate, the moving component presses down the trigger plate to enable the trigger plate to enter the detection range of the proximity switch, and the detection range is used for detecting the limit position state of the moving component;

when the moving direction of the moving component is vertical to the moving direction of the trigger plate, the moving component firstly gradually presses down the trigger plate to enable the trigger plate to enter the detection range of the proximity switch, and along with the continuous movement of the moving component, the trigger plate gradually leaves the detection range of the proximity switch under the action of the resetting device of the trigger plate to be used for detecting the position state of the moving component.

According to the method for preventing the proximity switch from being unstable due to vibration, the guide device of the trigger plate is arranged in the proximity switch seat, so that the trigger plate can only move up and down along the guide device in the proximity switch seat, the movement of the trigger plate in the left-right direction is avoided, and the horizontal linear distance of the trigger plate of the proximity switch cannot be changed.

In the method for preventing the proximity switch from being unstable due to vibration, the trigger plate is ensured not to be separated from the proximity switch seat by arranging the clamping device between the trigger plate and the proximity switch seat.

In the method for preventing the proximity switch from being unstable due to vibration, when the trigger plate is installed, the horizontal linear distance between the trigger plate and the proximity switch is adjusted by adjusting the position of the proximity switch trigger device in the proximity switch base so as to adapt to the types of the proximity switches in different detection ranges.

The method for preventing the shock instability of the proximity switch ensures that the trigger plate does not spontaneously move downwards due to the vibration of the equipment in the non-trigger state of the moving part by increasing the friction resistance between the trigger plate and the guide device of the trigger plate.

The invention has the beneficial effects that:

1. the method for preventing the proximity switch from being unstable due to vibration cannot be influenced by equipment vibration, and the distance between the proximity switch and the detection plate cannot be changed.

2. The method for preventing the proximity switch from being unstable due to vibration realizes the relative stability of the distance between the proximity switch and the detection plate by changing the trigger mode of the proximity switch.

3. The method for preventing the proximity switch from being unstable due to vibration enables the distance between the proximity switch and the detection plate to be adjustable by arranging the adjusting mechanism, and can adapt to proximity switches of different models.

4. According to the method for preventing the proximity switch from being unstable due to vibration, the friction ring is arranged in the guide sleeve, so that the inserting plate has enough resistance without being triggered by a moving part, and the inserting plate cannot move downwards under the vibration of equipment to generate a signal flickering phenomenon.

Drawings

The aspects and advantages of the present application will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. In the drawings:

fig. 1 is a schematic view of a proximity switch in a prior art.

Fig. 2 is a schematic view of a use state of the method for preventing the proximity switch from shaking instability according to embodiment 1 of the present invention.

Fig. 3 is a left side view of a usage state of the method of preventing shock instability of the proximity switch of fig. 2.

Fig. 4 is a schematic usage state diagram of a method for preventing a proximity switch from shock instability according to embodiment 2 of the present invention.

Fig. 5 is a left side view of a use state of the method of preventing shock instability of the proximity switch of fig. 4.

Fig. 6 is an enlarged view of a portion a of fig. 2.

The components represented by the reference numerals in the figures are:

the device comprises a device base body 1, a support 2, a proximity switch 3, a moving part 4, a detection plate 5, a bottom plate 6, a left vertical plate 7, a right vertical plate 7, a cover plate 8, an inserting plate 9, a clamping table 9a, a collision block 10, a guide sleeve 11, a spring 12 and a friction ring 13.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

A method for preventing the shock instability of a proximity switch, when using the proximity switch 3, the proximity switch 3 fixed on the proximity switch fixing device and the position of the trigger plate of the proximity switch trigger device are relatively fixed by integrating the proximity switch fixing device and the proximity switch trigger device into the same proximity switch seat, the relative position of the proximity switch 3 and the trigger plate installed on a device base body 1 can not change under the vibration effect of the device;

when the moving direction of the moving component 4 is consistent with the moving direction of the trigger plate, the moving component 4 presses down the trigger plate to enable the trigger plate to enter the detection range of the proximity switch 3, and the limit position state of the moving component 4 is detected;

when the moving direction of the moving component 4 is vertical to the moving direction of the trigger plate, the moving component 4 firstly gradually presses down the trigger plate to enable the trigger plate to enter the detection range of the proximity switch 3, and along with the continuous movement of the moving component 4, the trigger plate gradually leaves the detection range of the proximity switch 3 under the action of the resetting device of the trigger plate to be used for detecting the position state of the moving component 4.

Furthermore, the trigger plate can only move up and down along the guide device in the proximity switch seat by arranging the guide device of the trigger plate in the proximity switch seat, so that the movement of the trigger plate in the left-right direction is avoided, and the horizontal linear distance of the trigger plate of the proximity switch 3 cannot be changed.

Further, it is ensured that the trigger plate does not come out of the proximity switch holder by providing a snap-fit means between the trigger plate and the proximity switch holder, i.e. a snap-fit table 9a provided at the lower part of the plug-in board 9, as will be described in detail in the proximity switch system below.

Further, when the trigger plate is installed, the horizontal linear distance between the trigger plate and the proximity switch is adjusted by adjusting the position of the proximity switch trigger device in the proximity switch seat so as to adapt to the proximity switch types in different detection ranges.

Further, by increasing the frictional resistance between the trigger plate and the guide means of the trigger plate, it is ensured that the trigger plate does not move spontaneously downwards due to the vibration of the device in the non-triggered state of the moving part 4.

The approach switch system used by the method for preventing the approach switch from vibration instability comprises an approach switch and an approach switch seat; the proximity switch base is fixed on the equipment base body and comprises a proximity switch fixing device and a proximity switch triggering device; the proximity switch fixing device and the proximity switch triggering device are both fixed on the proximity switch base to form a stable whole, and under the action of external vibration, the relative position of the proximity switch and the triggering device cannot change due to vibration.

The proximity switch fixing device is used for fixedly mounting the proximity switch.

The proximity switch trigger device is used for detecting a moving part, and after the moving part touches a trigger plate of the proximity switch trigger device, the trigger plate enters a detection range of the proximity switch under the pushing of the moving part.

The proximity switch base further comprises a resetting device of the trigger plate, and the resetting device can restore the trigger plate to the initial position after the moving part leaves the trigger plate.

According to the shockproof proximity switch system, the proximity switch fixing device comprises the bottom plate and the support, the bottom plate is fixedly connected with the equipment base body, the support is fixedly connected to the bottom plate, and the proximity switch is fixedly installed on the support.

According to the shockproof proximity switch system, the proximity switch trigger device comprises a bottom plate, a left vertical plate, a right vertical plate, a guide sleeve and an inserting plate; the bottom plate is fixedly connected with the equipment base body, the 2 left and right vertical plates are fixedly arranged on the bottom plate, guide sleeves are arranged on the inner sides of the left and right vertical plates and used for guiding the inserting plate, and the inserting plate can only do vertical linear motion along holes of the guide sleeves; and the collision block fixed on the moving part can enable the plugboard to move up and down along the guide sleeve when touching the plugboard, and the plugboard leaves or enters the detection range of the proximity switch along with the up-and-down movement of the plugboard.

According to the shockproof proximity switch system, the proximity switch trigger device further comprises a cover plate, the cover plate is fixed above the left vertical plate and the right vertical plate, a hole through which the inserting plate passes is formed in the cover plate, and a clamping table is arranged at the lower part of the inserting plate and can be clamped in the hole of the cover plate so that the inserting plate cannot be separated from the cover plate.

According to the shockproof proximity switch system, the guide rail matched with the bottom of the guide sleeve is arranged on the bottom plate, and the guide sleeve moves on the bottom plate along the guide rail.

According to the shockproof proximity switch system, the guide sleeve is fixedly connected with the left vertical plate and the right vertical plate through bolts, the left vertical plate and the right vertical plate are provided with the oblong holes, the guide sleeve can move in the proximity switch seat to adjust the distance between the guide sleeve and the proximity switch, and the guide sleeve is fastened on the left vertical plate and the right vertical plate through bolts after the adjustment is finished.

In the shockproof proximity switch system, the reset device is an elastic element arranged at the lower part of the plug board.

In the shockproof proximity switch system, the elastic element is a spring.

According to the shockproof proximity switch system, the guide sleeve is provided with the friction ring, and the friction ring increases the resistance of the inserting plate to move in the guide sleeve.

In the shockproof proximity switch system, the friction ring is a wear-resistant rubber ring.

Example 1

Referring to fig. 2 and 3, fig. 2 and 3 are a shockproof proximity switch system according to embodiment 1 of the present invention, which includes a proximity switch 3 and a proximity switch holder; the proximity switch base is fixed on the equipment base body 1 and comprises a proximity switch fixing device and a proximity switch triggering device; the fixing device for fixing the proximity switch and the trigger device for triggering the proximity switch are fixed in the same proximity switch seat to form a whole, so that the relative position of the proximity switch and the trigger device cannot be changed under the action of external vibration; the proximity switch fixing device is used for fixedly mounting the proximity switch 3; the proximity switch triggering device is used for detecting a moving part 4, and after the moving part 4 touches a triggering plate of the proximity switch triggering device, the triggering plate enters a detection range of the proximity switch 3 under the pushing of the moving part 4; the proximity switch base further comprises a resetting device of the trigger plate, and the resetting device can restore the trigger plate to the initial position after the moving part 4 leaves the trigger plate.

Specifically, the proximity switch fixing device comprises a bottom plate 6 and a support 2, wherein the bottom plate 6 is welded on the equipment base body 1 through a bolt, the support 2 is fixedly welded on the bottom plate 6, the proximity switch 3 is fixedly installed on the support 2, the installation mode of the proximity switch 3 is determined according to the type of the proximity switch 3, as shown in fig. 1, the proximity switch 3 is inserted into a hole of the support 2, and two ends of the proximity switch are fixed through nuts.

As best shown in fig. 3, the proximity switch trigger device comprises a bottom plate 6, a left vertical plate 7, a right vertical plate 7, a guide sleeve 11 and an inserting plate 9, wherein the inserting plate 9 is a trigger plate for solving the problem of the switch trigger device; the bottom plate 6 is fixedly connected with the equipment base body 1, 2 left and right vertical plates 7 are fixedly arranged on the bottom plate 6 through bolts, guide sleeves 11 are arranged on the inner sides of the left and right vertical plates 7, the guide sleeves 11 provide guidance for the plug board 9, and the plug board 9 can only do vertical linear motion along holes of the guide sleeves 11; the collision block 10 fixed on the moving part 4 can enable the inserting plate 9 to move up and down along the guide sleeve 11 when touching the inserting plate 9, and the inserting plate 9 leaves or enters the detection range of the proximity switch 3 along with the up-and-down movement of the inserting plate 9; in this embodiment, the two ends of the insertion plate 9 are in the shape matched with the holes of the guide sleeve 11, and the middle part is a part for triggering the proximity switch 3, the material of the part should be selected to be the material capable of being detected by the selected proximity switch 3, for example, the proximity switch 3 is the type of copper, the material of at least the middle part of the insertion plate 9 should be the copper material, and the top part of the insertion plate 9 is widened and thickened, so that the contact area between the collision block 10 and the insertion plate can be increased.

In this embodiment, the moving member 4 is not moved downward after pressing down the inserting plate 9, and reaches the limit position of the downward movement of the moving member 4, and the proximity switch 3 is used for detecting whether the moving member 4 reaches the limit position.

Specifically, the proximity switch triggering device further comprises a cover plate 8, the cover plate 8 is fixedly installed above the left vertical plate 7 and the right vertical plate 7 through bolt connection, a hole through which the inserting plate 9 passes is formed in the cover plate 8, a clamping table 9a is arranged on the lower portion of the inserting plate 9, and the clamping table 9a can be clamped in the hole of the cover plate 8 to prevent the inserting plate 9 from falling out of the cover plate 8.

Preferably, the bottom plate 6 is provided with a guide rail used in cooperation with the bottom of the guide sleeve 11, as shown in fig. 3, the bottom plate 6 is provided with a groove shaped like a Chinese character 'tu', and the bottom plate of the guide sleeve 11 is provided with a clamping edge matched with the groove, so that the guide sleeve 11 can move on the bottom plate 6 along the guide rail, and the position of the guide sleeve 11 on the proximity switch base can be conveniently adjusted.

Further, the guide sleeve 11 is fixedly connected with the left vertical plate 7 and the right vertical plate 7 through bolts, the left vertical plate 7 and the right vertical plate 7 are provided with oblong holes, the guide sleeve 11 can move in the proximity switch seat to adjust the distance between the guide sleeve 11 and the proximity switch 3, and the guide sleeve 11 is fastened on the left vertical plate 7 and the right vertical plate 7 through bolts after adjustment is finished.

In particular, the resetting device is provided with an elastic element at the lower part of the trigger plate, namely, the elastic element is provided at the lower part of the inserting plate 9, so that the elastic element can spontaneously upwards move under the action of the elastic element.

Further, the elastic element is a spring 12, in this embodiment, the spring 12 is disposed in the guide sleeve 11, and the spring 12 has two functions, one is to provide a restoring force to the inserting plate 9, and the other is to provide a certain upward force to the inserting plate 9 when the moving part 4 does not touch the inserting plate 9, so that the moving part itself is not affected by the vibration of the device.

Preferably, the guide sleeve 11 is provided with a friction ring 13, as shown in fig. 6, the friction ring 13 increases the resistance of the insert plate (9) to move in the guide sleeve 11, and the friction ring 13 further increases the resistance of the guide sleeve 11 to the insert plate 9, so that the insert plate 9 cannot move downwards under a certain degree of equipment vibration, and can move downwards only under the touch of the moving part 4.

Preferably, the friction ring 13 should be a wear-resistant rubber ring.

Example 2

If under certain conditions, the opening and closing of the street lamp umbrella are required to be more purposeful or more accurate, the opening and closing conditions of the street lamp umbrella are required to be further set, and the embodiment provides a scheme for controlling the opening and closing of the street lamp umbrella by combining rainwater and a light intensity signal.

Referring to fig. 4 and 5, fig. 4 and 5 show a shockproof proximity switch system according to embodiment 2 of the present invention, which is different from embodiment 1 in that the moving member 4 continues to move after the proximity switch 3 is triggered, and more intuitively, the moving direction of the moving member 4 is perpendicular to the moving direction of the trigger plate, while in embodiment 1, the moving direction of the moving member 4 is the same as the moving direction of the trigger plate.

Specifically, the top of the trigger plate, i.e. the plug board 9, is set to be trapezoidal, the collision block 10 gradually presses down the plug board 9 through the contact with the inclined surface of the plug board 9 when contacting the plug board 9, and then the collision block further contacts with a section of plane, at this time, the lower part of the plug board 9 enters the detection range of the proximity switch 3, then the collision block 10 gradually leaves the plug board 9 along with the continuous movement of the moving part 4, and the plug board 9 leaves the detection range of the proximity switch 3 under the action of the reset device.

Preferably, the contact portion of the striking block 10 and the insert plate 9 is rounded or is shaped to match the top slope of the insert plate 9 so that it can smoothly match the striking block 10.

Other technical contents not mentioned in this embodiment may be the same as those in embodiment 1, and are not described again.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.