TWM590772U - Anti-rotation type material level switch with adjustable rotary shaft length - Google Patents

Abstract

This creation discloses a rotary resistance level switch with adjustable rotating shaft length, which includes a casing, a motor mechanism, a sleeve mechanism and a detection blade, and at least two rotating shafts, which are detachably connected to each other and connected to form a total shaft. One end of the main shaft is connected to the sleeve mechanism, and the other end is connected to the detection blade. This switch no longer needs to remove the entire section of the shaft from the sleeve mechanism and the detection blade, to separate the shaft from the sleeve components, only need to remove one or several sections, the disassembly is convenient and fast, and can avoid possible occurrence Missing parts, incorrect installation, mismatch between the new shaft and the sleeve mechanism, etc. In addition, the multi-segment detachable shaft can be multiple shafts with short lengths, one long and short, or many long and short. The use of rotating shafts of various specifications will not cause the backlog of certain types of rotating shafts caused by the existing practices, reducing the waste of parts and saving production costs.

Description

Rotary resistance level switch with adjustable shaft length

This creation relates to a material level switch, in particular to a resistance rotary material level switch with adjustable shaft length.

Rotary resistance level switch is widely used in modern industrial production process to detect or control powder and granular materials in open containers. In the market, we can see different shape of the material level switch. The principle is that the AC micromotor is used to slow down the detection blade after deceleration. When the material level of the tested material rises, the rotation of the blade is blocked. , The power of the motor is cut off to stop it. As long as the material level in the silo remains unchanged, this state will be maintained; when the material level drops and the detection blade loses its block, the level switch will return to the original state.

Through practical use, we found that the current rotary shaft level switch, the rotating shaft is usually a fixed length, if you need to detect the level of different heights, you need to replace the switch with a different length of shaft to detect; Or remove the shaft on the switch and replace it with a shaft of another length, and then continue to use it. You can know that because one end of the shaft is connected inside the sleeve mechanism, if you need to remove the shaft, you need to replace the shaft mechanism Some internal small parts are removed together, such as the shaft connector connecting the rotating shaft and the motor rotor, which is troublesome to disassemble and has a certain impact on production efficiency, and if the specifications of the new rotating shaft (such as diameter and other parameters) and the sleeve If the internal structure of the mechanism is unsuitable or there are missing parts and incorrect installation positions of parts during reinstallation, it may also cause the failure of the entire switch and cause more trouble; and, now the factory will adapt to different production needs. Prepare a variety of shafts, including shorter ones and longer ones. If the material level in the silo is deeper, longer length shafts will be used in large quantities, while shorter shaft lengths will be used. Less used, and vice versa, this will make the stock of a certain shaft in the warehouse backlog, resulting in a waste of cost.

The purpose of this creation is to provide a resistance level switch with adjustable shaft length for the above problems. It can easily and quickly adjust the length of the shaft to adapt to the detection of different heights.

In order to achieve the above purpose, the author provides the following technical solutions: a rotary resistance level switch with adjustable length of the rotating shaft, including a housing, a motor mechanism, a sleeve mechanism and a detection blade, and at least two rotating shafts, which are detachable from each other Connected and connected to form a main shaft, one end of the main shaft is connected to the sleeve mechanism and the other end is connected to the detection blade.

Preferably, the at least two rotating shafts are detachably connected by a coupling.

Preferably, the above-mentioned motor mechanism includes a motor group, a torsion spring, and a circuit board having a plurality of bayonets. One end of the torsion spring is connected to the motor group, and the other end is connected to any one of the plurality of bayonets of the circuit board.

Preferably, the shaft sleeve mechanism includes a shaft sleeve and a shaft connector set, an elastic piece and at least two balls arranged in the shaft sleeve, the elastic piece sleeve is arranged on the shaft connector set, the ball is arranged on the elastic piece and the shaft connection Between groups.

Preferably, the above-mentioned housing includes an upper housing and a lower housing, and a sealing ring is provided between the upper housing and the lower housing.

The beneficial effect of adopting the above technical solution is that: the traditional rotating shaft connected between the sleeve mechanism and the detection blade is made into a multi-stage type including at least two rotating shafts, which are detachably connected to each other, so that they are different in the face During the inspection of the deep material level, the length of the shaft can be adjusted quickly. Taking the two-stage rotating shaft as an example, when the height of the material level is low, connect the two rotating shafts together to perform the detection; when the height of the material level is high, remove the section of the shaft connecting the front end and the detection blade (Or change to a shorter version) The length of the shaft can be shortened to detect this level. Compared with the prior art, this switch no longer needs to remove the entire shaft from the sleeve mechanism and the detection blade, and then install another shaft of other length to install (generally there is no shaft to change, all are Directly change the product), it only needs to remove one or several of the sections, there is no need to separate the shaft and the sleeve component, the disassembly is convenient and fast, and it can also avoid possible missing parts, incorrect installation, and new shaft and shaft The sleeve mechanism is not suitable, etc. In addition, because the switch adopts a multi-segment detachable shaft design, it can be composed of multiple shafts with short lengths, one long and short, or many long and short, which can be combined The full use of various specifications of rotating shafts will no longer cause a backlog of certain types of rotating shafts in the warehouse caused by existing practices, thereby reducing waste of parts and saving production costs.

The preferred embodiment of this creation will be described in detail below with reference to the drawings.

Example 1

This embodiment is more preferable for implementing this creation. As shown in FIG. 1, the rotary resistance level switch with adjustable rotating shaft length in this embodiment includes a housing 1, a motor mechanism 2, a sleeve mechanism 3, and a detection blade 4, wherein the motor mechanism 2 is installed in the housing 1 It is connected to the sleeve mechanism 3 inside, and the sleeve mechanism 3 is connected to the housing 1 through the spring 24 and other parts. The resistance level switch also includes two rotating shafts 51, which can be the same length or can be With different lengths, the two rotating shafts 51 are detachably connected to each other and connected to form a total shaft. One end of the total shaft is connected to the sleeve mechanism 3 and the other end is connected to the detection blade 4. Wherein, the connection between the main shaft and the sleeve mechanism 3 can be detachable by a snap spring or a screw connection, and the connection between the main shaft and the detection blade 4 can be detachable by a cotter pin or a screw connection. This switch makes the traditional rotating shaft connected between the sleeve mechanism and the detection blade into a multi-stage type including two rotating shafts, which are detachably connected to each other, so that when facing the detection operation of the material level of different depths , You can quickly adjust the length of the shaft. When the height of the material level is low, the two rotating shafts are connected together, and the detection can be performed; when the height of the material level is high, the length of the shaft connecting the front end and the detection blade is removed, and the length of the shaft can be shortened To detect this level. Compared with the prior art, this switch no longer needs to remove the entire section of the shaft from the sleeve mechanism and the detection blade, and then replace it with another shaft of other length for installation. It only needs to remove one section (Or replace it with a shorter specification), there is no need to separate the shaft and bushing components, it is convenient and quick to disassemble, and it can also avoid possible missing parts, incorrect installation, and the mismatch between the new shaft and the bushing mechanism; in addition; Because the switch adopts a multi-segment detachable shaft design, it can be composed of a plurality of shafts with short lengths or one length and one short, which can make full use of various specifications of the shaft, which will no longer cause the existing practice. Bringing a certain type of inventory of the rotating shaft inventory in the warehouse, thereby reducing the waste of parts and saving production costs.

Continuing as shown in FIG. 1, the two rotating shafts 51 can be detachably connected by a coupling 52, and in particular, the coupling 52 and the rotating shaft 51 can be fixed by screws and other parts. Through the installation of the coupling 52, the rotation direction and rotation speed can be kept uniform between the rotation shafts 51, so that one of the rotation shafts 51 connected to the sleeve member 3 can accurately transmit torque to the other rotation shaft 51 connected to the detection blade 4 .

As shown in FIG. 2, the motor mechanism 2 may include a motor group 21, a torsion spring 22, and a circuit board 23 having a first bayonet 231, a second bayonet 232, and a third bayonet 233, and one end of the torsion spring 22 is connected to the electric The other end of the unit 21 is connected to the first bayonet 231, the second bayonet 232 or the third bayonet 233. The motor group 21 may include a motor 211 and a motor frame 212, the motor 211 is fixedly installed in the motor frame 212, the circuit board 23 may be connected to the motor frame 212 by screwing, and one end of the torsion spring 22 may form a hook and Hook the motor frame 212 (a hole can be formed in the motor frame 212 to match the hook), the other end can also form a hook to hook the first bayonet 231, the second bayonet 232 or the third bayonet 233, of course twist The spring 22 may also form ferrules at both ends thereof to connect the motor unit 21 and the circuit board 23 in a sleeve manner, and the connection method is not limited to the form of a hook. By adjusting the torsion spring 22, the end of the torsion spring 22 connected to the circuit board 23 can be switched between the first bayonet 231, the second bayonet 232, and the third bayonet 233, and by switching between different bayonets, The torsion spring 22 forms different resistances to the motor unit 21, and the first bayonet 231, the second bayonet 232, and the third bayonet 233 in this embodiment respectively represent three levels of resistance, strong, medium, and weak, thus To adapt to the detection operation of materials with different specific gravity.

The bayonet of the above-mentioned circuit board 23 can also be set to two, four or more, which can adapt to a wider range of operational requirements. We can change the number of bayonet of the circuit board 23 according to actual needs. The number is not limited to the three above.

As shown in FIG. 3, the sleeve mechanism 3 may include a sleeve 31 and a shaft connector group 32, an elastic piece 33 and two balls 34 provided in the sleeve 31. The elastic piece 33 is sleeved on the shaft connector group 32 The ball 34 is disposed between the elastic piece 33 and the shaft connector group 32. The shaft connector group 32 may specifically include a first shaft connector 321 and a second shaft connector 322, the first shaft connector 321 is sleeved on the rotor of the motor mechanism 2, and the second shaft connector 322 is sleeved on the first shaft On the connector 321, the balls 34 can be evenly distributed on the outer wall of the second shaft connector 322 and disposed in the through hole opened on the outer wall, and then the elastic sheet 33 is sleeved on the second shaft connector 322 and the ball 34 on. When the motor mechanism 2 rotates, its rotor usually sways and deviates from the axis. At this time, it will touch the ball 34 through the shaft connector group 32. After the ball 34 contacts the spring 33 outside it, it passes through the spring 33. The rebound force springs the rotor back to the axis, and through this cooperation, the forward and reverse protection of the motor mechanism 2 can be achieved.

The number of the above-mentioned balls 34 can also be set to three, four, or more, which can cooperate with the elastic piece 33 to form a denser springback point for the motor mechanism 2, and can also achieve forward and reverse protection of the motor mechanism 2.

As shown in FIG. 4, the housing 1 may include an upper housing 11 and a lower housing 12. A sealing ring 13 is provided between the upper housing 11 and the lower housing 12. Specifically, the upper housing may also be screwed or other parts. 11 and the lower housing 12 are locked with each other. By providing the sealing ring 13, the housing 1 can have the advantages of waterproof and dustproof.

Example 2

The other contents are the same as those described in Embodiment 1, except that the rotation shaft is set to three, which can be adapted to a wider range of different material level detection operations. The three rotating shafts may be the same length or different lengths, or two of the rotating shafts have the same length, and the other one has a different length from the two rotating shafts.

The above three rotating shafts can be detachably connected by two couplings.

The above is only the preferred embodiment of this creation. It should be pointed out that for those of ordinary skill in the art, several variations and improvements can be made without departing from the creative concept of this creation. The scope of protection of creation.

1‧‧‧Housing 11‧‧‧Upper case 12‧‧‧Lower case 13‧‧‧Seal 2‧‧‧Motor mechanism 21‧‧‧Motor unit 211‧‧‧Motor 212‧‧‧Motor frame 22‧‧‧torsion spring 23‧‧‧ circuit board 231‧‧‧ First bayonet 232‧‧‧Second bayonet 233‧‧‧ third bayonet 24‧‧‧Clamp 3‧‧‧Shaft sleeve mechanism 31‧‧‧Sleeve 32‧‧‧Axis connector group 321‧‧‧ First axis connector 322‧‧‧Second axis connector 33‧‧‧Shrapnel 34‧‧‧ball 4‧‧‧Detection blade 51‧‧‧spindle 52‧‧‧Coupling

FIG. 1 is a schematic structural view of the rotary resistance level switch with adjustable shaft length in the first embodiment of the present invention. Figure 2: This is a schematic structural diagram of the motor mechanism of the rotary shaft level switch with adjustable shaft length in the first embodiment in Embodiment 1. Figure 3: This is a schematic structural view of the sleeve mechanism of the rotary shaft level switch with adjustable shaft length in the first embodiment of the present invention. Fig. 4: It is a schematic structural view of the casing of the rotary resistance level switch with adjustable shaft length in the first embodiment.

1‧‧‧Housing

2‧‧‧Motor mechanism

24‧‧‧Clamp

3‧‧‧Shaft sleeve mechanism

4‧‧‧Detection blade

51‧‧‧spindle

52‧‧‧Coupling

Claims (5)

A rotary resistance level switch with adjustable rotating shaft length includes a housing, a motor mechanism, a bushing mechanism and a detection blade, and is characterized in that it also includes at least two rotating shafts, which are detachably connected to each other and connected to form a total shaft. One end of the total shaft is connected to the sleeve mechanism, and the other end is connected to the detection blade. A rotary resistance level switch with adjustable shaft length as described in item 1 of the patent application range, wherein the at least two shafts are detachably connected by a coupling. A rotary resistance level switch with adjustable shaft length as described in item 1 of the patent scope, wherein the motor mechanism includes a motor group, a torsion spring, and a circuit board with a plurality of bayonet, one end of the torsion spring Connect to the motor set and connect to any one of the multiple bayonet of the circuit board at the other end. A rotary resistance level switch with adjustable shaft length as described in item 1 of the patent application scope, wherein the shaft sleeve mechanism includes a shaft sleeve and a shaft connector set, shrapnel and at least two For the ball roller, the elastic piece is sleeved on the shaft connector group, and the ball is arranged between the elastic piece and the shaft connector group. A rotary resistance level switch with adjustable shaft length as described in item 1 of the patent application scope, wherein the housing includes an upper housing and a lower housing, and a Sealing ring.

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