Feedback potentiometer fixing support of PSL straight-stroke electric actuating mechanism

Abstract

The utility model discloses a feedback potentiometer fixing support of a PSL straight-stroke electric actuating mechanism. The feedback potentiometer fixing support comprises a base fixed on a bottom plate in the PSL straight-stroke electric actuating mechanism, and a hinge arm vertically arranged at the front end of the base. The top of the hinge arm is hinged to the lower end of the rotating arm, a mounting hole is formed in the top of the rotating arm, and the feedback potentiometer is mounted in the mounting hole. The bottom of the rotating arm is connected with the tail of the base through a spring, the spring tensions the rotating arm, a gear of the feedback potentiometer is pressed on the toothed plate, and the gear and the toothed plate are kept in an engaged state. The feedback potentiometer and the gear are supported by the base and the rotating arm, the feedback potentiometer and the gear have a certain movement range by hinging the rotating arm, and the gear of the feedback potentiometer is firmly pressed on the toothed plate through the pressing force of the spring.

Description

Technical Field

[0001] The utility model relates to the technical field of fixed brackets, in particular to a feedback potentiometer fixed bracket of a PSL linear travel electric actuator. Background Art

[0002] PSL linear electric actuator is a device that can be widely used for the switching and regulating control of single-seat valves, double-seat valves, sleeve valves, three-way regulating valves and diaphragm valves with linear motion.

[0003] The working principle of the PSL linear electric actuators with models PSL208.1MA, PSL214MA-30-AMT, and PSL312MA is that when a signal is received to adjust and control the valve, the toothed plate inside the PSL linear electric actuator will move up and down, thereby driving the feedback potentiometer gear, and the gear then drives the potentiometer knob to change the resistance value of the potentiometer. After the resistance value changes, it is converted into a displacement signal. In this way, the current valve opening can be obtained through the change in resistance value, completing the transmission of the feedback signal. There is a bracket inside the PSL linear electric actuator, which is used to fix the position of the feedback potentiometer. The gear can press the toothed plate, thereby accurately transmitting the up and down displacement signal to the potentiometer.

[0004] The original feedback potentiometer gear bracket inside the PSL linear electric actuator is made of plastic, and it does not take into account the frequent vibrations that may occur during operation of the actuator. Long-term operation under frequent vibration conditions will cause a high failure rate of the feedback potentiometer, which will reduce the service life of the feedback potentiometer. In addition, the plastic bracket will become fatigued and brittle and break under frequent vibration conditions for a long time. Once the bracket is damaged, the feedback potentiometer gear and the tooth plate will lose reliable transmission, and the electric actuator will not be able to receive the feedback model, causing the actuator to fail. The tooth plate sizes inside different models of PSL linear electric actuators are inconsistent. The bracket is not universal between different models and there are no related accessories that can be purchased separately. The entire PSL linear electric actuator needs to be replaced directly, which has high maintenance costs. In the existing feedback potentiometer fixed bracket, for example, the Chinese utility model patent with patent number CN 201320658448.3 discloses a potentiometer bracket for an angular stroke electric actuator, including a potentiometer bracket frame, the potentiometer bracket frame is L-shaped, one end of which is provided with a circular hole passing through the fixed bracket, the other end of which is provided with a limiting hole with a notch for fixing the indicating disk shaft, and the middle of the corner is provided with a potentiometer jack for connecting the potentiometer. Although the patent is a potentiometer bracket, it is only applicable to angular stroke actuators, not to linear actuators. The gear plate of the PSL linear stroke electric actuator and the gear meshing of the potentiometer will frequently vibrate during operation, while the angular stroke actuator is a gear-gear rotating meshing transmission, and its vibration amplitude is small, and the patent is a fixed bracket, which cannot reduce the vibration of the actuator. The notch on the potentiometer bracket frame limits the fixed indicating disk shaft, and the limiting notch is easy to contact and rub with the indicating disk shaft when limiting the indicating disk shaft, affecting the rotation of the indicating disk shaft, and easily aggravating the vibration of the indicating disk shaft. Summary of the invention

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a feedback potentiometer fixing bracket for a PSL linear travel electric actuator.

[0006] The utility model is realized by the following technical solutions:

[0007] A feedback potentiometer fixing bracket of a PSL linear travel electric actuator, comprising:

[0008] A base 1 is fixed on a bottom plate 4 inside the PSL linear electric actuator, and a hinged arm 11 is vertically arranged at the front end of the base 1;

[0009] The lower end of the rotating arm 2 is hinged to the top of the articulated arm 11, and a sleeve hole 21 is provided on the top of the rotating arm 2 for installing the feedback potentiometer 5;

[0010] The spring 3 has one end connected to the bottom of the rotating arm 2 and the other end connected to the tail of the base 1, and is used to tighten the rotating arm 2 so that the gear 6 of the feedback potentiometer 5 remains in a state of meshing with the toothed plate 7.

[0011] Furthermore, a first hook 12 is disposed at the tail of the base 1 , a second hook 22 is disposed at the bottom of the rotating arm 2 , and two ends of the spring 3 are hung on the first hook 12 and the second hook 22 , respectively.

[0012] Furthermore, the bottom of the rotating arm 2 is a U-shaped structure, and two articulated arms 11 are vertically arranged at the front end of the base 1. The width of the two articulated arms 11 is greater than the width of the bottom of the rotating arm 2. A hinge shaft 13 is arranged on the top of the two articulated arms 11. Hinge holes are arranged on the two side walls of the U-shaped structure at the bottom of the rotating arm 2, and the rotating arm 2 is rotatably connected to the hinge shaft 13 through the articulated holes.

[0013] Furthermore, at least two waist-shaped holes 14 are provided on the base 1, and threaded holes corresponding to the waist-shaped holes 14 are provided on the bottom plate 4 inside the PSL linear electric actuator. The base 1 is installed in the threaded holes on the bottom plate 4 by passing bolts through the waist-shaped holes 14.

[0014] Furthermore, when the rotating arm 2 is in a vertical state and the tooth plate 7 descends to the lowest point of the stroke, the height of the top of the rotating arm 2 matches the height of the top of the tooth plate 7 .

[0015] Furthermore, the base 1 and the rotating arm 2 are made of stainless steel or aluminum alloy.

[0016] The working principle of this utility model:

[0017] The utility model supports the feedback potentiometer 5 and the gear 6 through the base 1 and the rotating arm 2, and the feedback potentiometer 5 and the gear 6 have a certain range of motion by articulating the rotating arm 2, and the feedback potentiometer 5 and the gear 6 are firmly pressed on the tooth plate 7 by the pressing force of the spring 3. When the PSL linear electric actuator rotates during operation, the force of the vibration of the tooth plate 7 is transmitted to the gear 6, and the rotating arm 2 is stressed and drives the gear 6 to rotate following the vibration amplitude of the tooth plate 7. At the same time, the spring 3 follows the rotation of the rotating arm 2 and expands and contracts. The elastic force of the spring 3 always pulls the bottom of the rotating arm 2 toward the outside of the base 1, so that the top of the rotating arm 2 always has a force to rotate in the direction of the tooth plate 7, thereby firmly pressing the gear 6 on the tooth plate 7 for meshing transmission.

[0018] When installing the utility model, the rotating arm 2 is sleeved onto the outer sleeve of the gear shaft of the gear 6 of the feedback potentiometer 5 through the sleeve hole 21, and the rotating arm 2 and the feedback potentiometer 5 are fixed with bolts. Then the rotating arm 2 is rotated and adjusted to determine the height of the rotating arm 2, so that the gear 6 can effectively transmit with the gear plate 7 within the full stroke of the gear plate 7, and the bracket base 1 can fall on the bottom plate 4. The bracket base 1 is installed in the threaded hole on the bottom plate 4 by bolts. The two hooks are connected by springs 3, so that the gear 6 on the rotating arm 2 is meshed with the gear plate 7.

[0019] Compared with the prior art, the utility model has the following beneficial effects:

[0020] The utility model will not be damaged even under frequent vibration conditions, thereby saving a lot of manpower, material resources and economic costs for replacing the electric actuator due to bracket damage.

[0021] The bracket currently manufactured by the utility model can rotate and adjust the rotating arm 2 of the bracket according to the size of the tooth plate 7, so that the bracket can be suitable for different models of PSL linear travel electric actuators, which is convenient and universal.

[0022] The utility model can be used for PSL linear travel electric actuators of different models, realizes the function of fixing the position of the feedback potentiometer and enabling the gear to press the tooth plate, and also has the characteristic of being durable. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0024] Figure 2 This is a schematic diagram of the installation of the utility model, the feedback potentiometer and the gear;

[0025] Figure 3 This is a schematic diagram of the movement direction of the rotating arm of the utility model;

[0026] Figure 4 This is a usage state diagram of the utility model.

[0027] Numbers in the figure:

[0028] 1-base, 11-articulated arm, 12-first hook, 13-articulated shaft, 14-waist-shaped hole;

[0029] 2-rotating arm, 21-hole, 22-second hook;

[0030] 3- Spring;

[0031] 4-base plate; 5-feedback potentiometer; 6-gear; 7-tooth plate. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the technical solution of the utility model, its specific implementation method is described in detail below with reference to the accompanying drawings.

[0033] like Figure 1-4 As shown, a feedback potentiometer fixing bracket of a PSL linear electric actuator comprises a base 1 fixed on a bottom plate 4 inside the PSL linear electric actuator, an articulated arm 11 is vertically arranged at the front end of the base 1; the top of the articulated arm 11 is hinged to the lower end of a rotating arm 2, a sleeve hole 21 is arranged at the top of the rotating arm 2, and a feedback potentiometer 5 is installed on the sleeve hole 21; the bottom of the rotating arm 2 and the tail of the base 1 are connected by a spring 3, and the spring 3 tightens the rotating arm 2 to keep the gear 6 and the toothed plate 7 in a meshing state.

[0034] In an embodiment, Figure 1 , 2 As shown in Figures 3 and 4, a first hook 12 is provided at the tail of the base 1, a second hook 22 is provided at the bottom of the rotating arm 2, and both ends of the spring 3 are respectively hung on the first hook 12 and the second hook 22. When vibration occurs during the transmission process between the toothed plate 7 and the gear 6, the rotatable rotating arm 2 has a vibration reduction effect; at the same time, the tension of the spring 3 presses the top of the rotating arm 2 toward the toothed plate 7, and the pressing force of the rotating arm 2 firmly presses the gear 6 of the feedback potentiometer 5 onto the toothed plate 7, ensuring long-term and reliable transmission between the toothed plate 7 and the gear 6.

[0035] In an embodiment, Figure 2 As shown, the bottom of the rotating arm 2 is a U-shaped structure, and two hinged arms 11 are vertically arranged at the front end of the base 1. The width of the two hinged arms 11 is greater than the width of the bottom of the rotating arm 2. A hinge shaft 13 is arranged on the top of the two hinged arms 11. Hinge holes are arranged on the two side walls of the U-shaped structure at the bottom of the rotating arm 2. The rotating arm 2 is rotatably connected to the hinge shaft 13 through the hinge holes. The U-shaped structure at the bottom of the rotating arm 2 ensures that the rotating arm 2 is parallel to the tooth plate 7, prevents the rotating arm 2 from tilting, affects the meshing of the gear 6 and the tooth plate 7, and reduces the vibration of the tooth plate 7 caused by unbalanced force.

[0036] In an embodiment, Figure 3 As shown, at least two waist-shaped holes 14 are provided on the base 1, and threaded holes corresponding to the waist-shaped holes 14 are provided on the bottom plate 4 inside the PSL linear electric actuator. The base 1 is installed in the threaded holes on the bottom plate 4 by passing bolts through the waist-shaped holes 14.

[0037] In the embodiment, as shown in the figure, when the rotating arm 2 is in a vertical state and the toothed plate 7 is lowered to the lowest point of the travel, the height of the top of the rotating arm 2 matches the height of the top of the toothed plate 7. When the toothed plate 7 is lowered to the lowest point, the gear 6 at the top of the rotating arm 2 is engaged with the toothed plate 7 and is located at the upper position of the toothed plate 7, ensuring that the gear 6 is always within the travel range of the toothed plate 7 when the toothed plate 7 moves up and down.

[0038] In the embodiment, the base 1 and the rotating arm 2 are made of stainless steel or aluminum alloy, which has high structural strength and is durable.

[0039] Working mode of the utility model:

[0040] When installing this utility model:

[0041] Step 1: Sleeve the rotating arm 2 onto the outer sleeve of the gear shaft of the feedback potentiometer 5 gear 6 through the sleeve hole 21, and fix the rotating arm 2 and the feedback potentiometer 5 with bolts.

[0042] Step 2: Rotate and adjust the rotating arm 2 to determine the height of the rotating arm 2 so that the gear 6 can effectively transmit to the toothed plate 7 within the full stroke of the toothed plate 7 and the bracket base 1 can fall on the bottom plate 4.

[0043] Step 3: Install the bracket base 1 into the threaded hole on the base plate 4 by means of bolts.

[0044] Step 4: Connect the two hooks with the spring 3 so that the gear 6 on the rotating arm 2 is meshed with the toothed plate 7.

[0045] It should be noted that the above detailed introduction of the technical solution of the utility model and the description of the principle of the utility model are provided, and the above description of the working principle is only used to help understand the core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

[0046] The technical personnel in the technical field of the utility model can make modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, which shall fall within the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A feedback potentiometer fixing bracket for a PSL linear electric actuator, characterized in that: include: A base (1) is fixed on a bottom plate (4) inside the PSL linear electric actuator, and a hinged arm (11) is vertically arranged at the front end of the base (1); The lower end of the rotating arm (2) is hinged to the top of the articulated arm (11), and the top of the rotating arm (2) is provided with a sleeve hole (21) for installing a feedback potentiometer (5); The spring (3) has one end connected to the bottom of the rotating arm (2) and the other end connected to the tail of the base (1), and is used to tighten the rotating arm (2) so that the gear (6) of the feedback potentiometer (5) remains in a meshing state with the toothed plate (7).

2. The feedback potentiometer fixing bracket of the PSL linear electric actuator according to claim 1 is characterized in that: The base (1) is provided with a first hook (12) at the rear, the rotating arm (2) is provided with a second hook (22) at the bottom, and the two ends of the spring (3) are respectively hung on the first hook (12) and the second hook (22).

3. The feedback potentiometer fixing bracket of the PSL linear electric actuator according to claim 1 is characterized in that: The bottom of the rotating arm (2) is in a U-shaped structure. Two hinged arms (11) are vertically arranged at the front end of the base (1). The width of the two hinged arms (11) is greater than the width of the bottom of the rotating arm (2). A hinge shaft (13) is arranged at the top of the two hinged arms (11). Hinge holes are arranged on the two side walls of the U-shaped structure at the bottom of the rotating arm (2). The rotating arm (2) is rotatably connected to the hinge shaft (13) through the hinge holes.

4. The feedback potentiometer fixing bracket of the PSL linear electric actuator according to claim 1 is characterized in that: The base (1) is provided with at least two waist-shaped holes (14), and the bottom plate (4) inside the PSL linear electric actuator is provided with threaded holes corresponding to the waist-shaped holes (14). The base (1) is installed in the threaded holes on the bottom plate (4) by means of bolts passing through the waist-shaped holes (14).

5. The feedback potentiometer fixing bracket of the PSL linear electric actuator according to claim 1 is characterized in that: When the rotating arm (2) is in a vertical state and the toothed plate (7) descends to the lowest point of its travel, the height of the top of the rotating arm (2) matches the height of the top of the toothed plate (7).

6. The feedback potentiometer fixing bracket of the PSL linear electric actuator according to claim 1 is characterized in that: The base (1) and the rotating arm (2) are made of stainless steel or aluminum alloy.

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