A new trigger structure of a motor limit switch

Abstract

The utility model discloses a novel trigger structure of motor limit switch belongs to motor auxiliary tool technical field. The structure includes motor body, threaded output shaft, special-shaped nut and respectively set in the lower limit switch and upper limit switch of threaded output shaft bottom and motor one side. The upper limit switch can be carried out height adjustment through the adjusting hole on the mounting support, thereby and the lower limit switch cooperation realizes the flexible adjustment to motor rotation circle number, makes the user to be able to according to actual demand self -definition stroke end position, significantly improves the applicability and flexibility of equipment. In addition, by arranging two limit switches staggered, effectively optimize longitudinal space structure, help to realize the miniaturization of adjustable circle number electric valve controller, and respectively accurate control positive and negative two directions limit position. Special-shaped nut can reliably, accurately trigger corresponding limit switch in the up and down movement of threaded output shaft, and operation is stable, response is accurate.

Description

Technical Field

[0001] This utility model relates to the field of motor auxiliary equipment technology, specifically a novel triggering structure for a motor limit switch. Background Technology

[0002] Motor limit switches are crucial safety and control components in motor operating systems, acting like precise "spatial sentinels." They are typically installed at the endpoints of the travel range of motor-driven moving parts, constantly monitoring the part's range of motion. When the motor drives the part to a preset limit position, the limit switch quickly senses this and triggers its action, promptly cutting off the motor power or changing the motor's direction of rotation to prevent collisions and damage caused by excessive movement, thus ensuring the safe operation of the equipment. They come in various structures, including mechanical and electronic types, to adapt to different working environments. With their sensitive response and reliable performance, motor limit switches are widely used in automated production lines, machinery, elevators, and other fields, providing a solid defense for the stable and safe operation of motors.

[0003] Under the current technological landscape, the application of electric valve controllers faces significant limitations. On one hand, most electric valve controllers on the market operate on a fixed number of rotations, severely restricting their flexibility in application scenarios and making it difficult to meet the precise control requirements for valve opening and closing under different working conditions. On the other hand, while valve controllers with adjustable rotation numbers can solve the above problems, their large size becomes a new obstacle. In narrow spaces such as small piping rooms or compact equipment layouts, it is impossible to find a suitable installation location, causing considerable difficulties for equipment selection and installation in related industries.

[0004] Therefore, a novel triggering structure for a motor limit switch is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a novel triggering structure for a motor limit switch to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a novel triggering structure for a motor limit switch, comprising a motor body, a threaded output shaft on the motor body, the threaded output shaft being threaded, a shaped nut being screwed onto the threaded output shaft, the threaded output shaft penetrating a base plate, a lower limit switch and an upper limit switch bracket being fixedly mounted on the base plate, the upper limit switch bracket mounting the upper limit switch. The shaped nut can contact the lower limit switch and the upper limit switch respectively.

[0007] Preferably, an upper limit switch bracket is installed on the base plate, with one side of the upper limit switch bracket in contact with the other side of the upper limit switch body.

[0008] Preferably, the lower limit switch and the upper limit switch are arranged in a staggered manner.

[0009] Preferably, two fixing bolts are fixedly installed on the upper limit switch bracket. The two fixing bolts pass through the upper limit switch body and are threaded with two locking nuts respectively. One side of each locking nut is in contact with the corresponding side of the upper limit switch body.

[0010] Preferably, the upper limit switch bracket has two vertically symmetrical adjustment holes, and two fixing bolts are vertically slidably installed inside the two adjustment holes respectively.

[0011] Preferably, the upper limit switch bracket has a vertical limit hole, and one end of the irregular nut is vertically slidably installed inside the limit hole.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] (1) This utility model adjusts the number of rotations of the valve motor by adjusting the distance between two limit switches. This means that the stroke end point is no longer fixed, and users can flexibly and accurately set the stop position according to actual needs, greatly increasing the applicability and flexibility of the equipment.

[0014] (2) This utility model effectively optimizes the longitudinal spatial structure by staggering the two limit switches, which helps to realize the miniaturization of the adjustable number of turns electric valve controller and accurately control the extreme positions in both the positive and negative directions.

[0015] (3) The present invention features a non-standard nut. The non-standard nut can reliably and accurately trigger the corresponding misaligned limit switches as it moves up and down with the threaded output shaft, resulting in stable operation and precise response. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 2 This is a side view of the structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the unfolded structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the connection structure of the threaded output shaft, the irregular nut, and the upper limit switch bracket of this utility model;

[0020] In the diagram: 1. Motor body; 2. Threaded output shaft; 3. Irregular nut; 4. Lower limit switch body; 5. Upper limit switch body; 6. Fixing bolt; 7. Locking nut; 8. Upper limit switch bracket; 9. Limit hole; 10. Base plate; 11. Adjustment hole. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example: Please refer to Figure 1-3 This utility model provides a technical solution: a novel triggering structure for a motor limit switch, comprising a motor body 1, a threaded output shaft 2 on the motor body 1, the threaded output shaft 2 being threaded, a shaped nut 3 screwed onto the threaded output shaft 2, the threaded output shaft 2 passing through a base plate 10, a lower limit switch body 4 and an upper limit switch bracket 8 fixedly mounted on the base plate 10, the upper limit switch bracket 8 fixing an upper limit switch body 5, and the shaped nut 3 being able to contact the lower limit switch body 4 and the upper limit switch body 5 respectively. Two positioning bolts 6 are fixedly mounted on one side of the motor body 1, the two positioning bolts 6 passing through the upper limit switch body 5 and respectively screwing onto two locking nuts 7, one side of each locking nut 7 contacting the corresponding side of the upper limit switch body 5. The motor body 1 drives the threaded output shaft 2 to rotate, and the threaded output shaft 2 drives the irregular nut 3 to move vertically. The number of rotations of the threaded output shaft 2 driven by the motor body 1 is controlled by controlling the distance between the lower limit switch body 4 and the upper limit switch body 5. The lower limit switch body 4 and the upper limit switch body 5 are used to realize the automatic control of the start and stop of the motor body 1 after rotation. This not only controls the number of rotations of the threaded output shaft 2, but also avoids the waste of electricity and damage to the motor body 1 when it runs idle. At the same time, the device has a simple structure, small size, and significantly improved applicability.

[0023] Furthermore, an upper limit switch bracket 8 is installed on the base plate 10. Two vertically symmetrical adjustment holes 11 are formed on the bracket 8, and two positioning bolts 6 are vertically slidably installed inside the two adjustment holes 11. One side of the bracket 8 contacts the other side of the upper limit switch body 5. By using the vertical sliding of the fixing bolts 6 within the adjustment holes 11 on the bracket 8, the distance between the lower limit switch body 4 and the upper limit switch body 5 can be effectively and conveniently adjusted, thereby facilitating the control and adjustment of the number of rotations of the threaded output shaft 2. Simultaneously, a limit hole 9 is vertically formed on the bracket 8, and one end of the irregular nut 3 is vertically slidably installed inside the limit hole 9. By using the sliding of the irregular nut 3 within the limit hole 9 on the bracket 8, the irregular nut 3 is restricted to sliding only along the vertical inner wall of the limit hole 9 when the threaded output shaft 2 rotates, preventing the irregular nut 3 from rotating with the threaded output shaft 2.

[0024] The working principle is as follows: During the use of the motor, first screw the irregular nut 3 onto the threaded output shaft 2 and pass it through the limiting hole 9. Then, install the lower limit switch body 4 and the bracket 8 on the base plate 10. Next, adjust the upper limit switch 5 vertically within the adjustment hole 11 on the bracket 8 according to the actual number of rotations required for the motor body 1. After the position of the limit switch 5 is determined, use two locking nuts 7 to fix the upper limit switch body 5 and the bracket 8 onto two fixing bolts 6, thus completing the assembly. When using the motor body after assembly, first connect the motor body 1 to an external power supply or connect it to an AC cable. Then, press the start switch on the motor body 1, which will drive the threaded output shaft 2 to rotate. At this time, because one end of the irregular nut 3 is restricted by the limiting hole 9 on the bracket 8, the irregular nut 3 can only move along the vertical inner wall of the limiting hole 9 during the rotation of the threaded output shaft 2. When the irregular nut 3 moves vertically to contact the contact switch of the lower limit switch body 4 during the continuous rotation of the threaded output shaft 2, the motor body 1 will automatically stop. When the motor body 1 rotates in the reverse direction, the threaded output shaft 2 drives the irregular nut 3 to move upward. When the irregular nut 3 moves to contact the contact switch on the upper limit switch body 5, it will also cause the motor body 1 to stop automatically, thereby effectively controlling the number of turns of the threaded output shaft 2 on the motor body 1.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A new type of triggering structure of a motor limit switch, comprising a motor body (1), characterized in that: The motor body (1) is provided with a threaded output shaft (2), which is threaded. A special-shaped nut (3) is screwed onto the threaded output shaft (2). The threaded output shaft (2) passes through the base plate (10). The base plate (10) is fixedly installed with a lower limit switch body (4) and an upper limit switch bracket (8). The upper limit switch bracket (8) is equipped with an upper limit switch body (5). The special-shaped nut (3) can contact the lower limit switch body (4) and the upper limit switch body (5) respectively.

2. A new type of triggering structure of a motor limit switch according to claim 1, characterized in that: The upper limit switch bracket (8) has two vertically symmetrical adjustment holes (11). Two fixing bolts (6) are fixedly installed on one side of the 1. The two fixing bolts (6) are vertically slidably installed inside the two adjustment holes (11) for adjusting the upper limit switch body (5) up and down.

3. A new type of triggering structure of a motor limit switch according to claim 2, characterized in that: Both fixing bolts (6) penetrate the upper limit switch body (5) and are threaded with two locking nuts (7). One side of each locking nut (7) is in contact with the corresponding side of the upper limit switch body (5).

4. A new type of triggering structure of a motor limit switch according to claim 3, characterized in that: The upper limit switch bracket (8) has a vertical limit hole (9) and one end of the irregular nut (3) is vertically slidably installed inside the limit hole (9).

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