Intelligent electric actuator for new automobile energy thermal management

Abstract

The utility model relates to the technical field of actuators, and discloses an intelligent electric actuator for new automobile energy heat management, which comprises a pipeline, a base is fixedly mounted at the bottom end of the pipeline, a water outlet is fixedly mounted at one end of the pipeline, and a mounting port is fixedly mounted on one side, away from the water outlet, of the pipeline. The device is composed of an actuator valve body, an intermittent rotating device, a base and the like, the actuator valve body achieves fine adjustment and self-resetting through a threaded lead screw and a spring, the intermittent rotating device drives a rotating disc to be matched with a grooved wheel through a motor, accurate intermittent control over an actuator is achieved, and the base is provided with a mounting hole and a sealing base. The device is simple in structure, convenient to install and capable of preventing cooling liquid from leaking, effectively adjusts the flow of the cooling liquid by accurately controlling opening and closing of the valve, and improves the performance and reliability of an automobile thermal management system.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of actuator, specifically to a new intelligent electric actuator for automobile energy thermal management. BACKGROUND

[0002] In the automobile energy thermal management system, the intelligent electric actuator plays a crucial role. It is responsible for accurately controlling the flow and direction of various fluid media to ensure the efficient and stable operation of the automobile energy system. However, the existing intelligent electric actuator still has some deficiencies in design.

[0003] Patent announcement number for CN210920131U, this actuator through the clever setting of parts box, piston pipe, valve seat, fixed magnet, coil, moving magnet and other components, realized the simple structure and long service life advantage, it utilizes electromagnetic principle, through the interaction of the magnetic field generated by the coil electrification and the moving magnet, to control the up and down movement of the piston plate, thereby realizing the opening and closing control of the valve, this design improves the response speed and stability of the actuator to a certain extent, however, the above patent in the execution of automobile energy thermal management task, although it can basically meet the control demand, but still has some limitations, it mainly solves the problem of complex structure and short service life of electric actuator, but does not fully consider the particularity and complexity of automobile energy thermal management system, for example, in the automobile energy thermal management system, the actuator often needs to accurately control the flow of multiple different media, and also needs to have high high-temperature resistance and high-pressure resistance, therefore, we propose a new intelligent electric actuator for automobile energy thermal management. UTILITY MODEL CONTENTS

[0004] In view of the deficiencies of the prior art, the utility model provides an intelligent electric actuator for new automobile energy thermal management, which solves the above problems.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: an intelligent electric actuator for new automobile energy thermal management, comprising a pipeline, a bottom end of the pipeline is fixedly installed with a base, one end of the pipeline is fixedly installed with a water outlet, the side of the pipeline away from the water outlet is fixedly installed with a mounting port, the top end of the middle part of the pipeline is fixedly installed with a valve body mounting cylinder, the top end of the valve body mounting cylinder is fixedly installed with an upper cover, the top end of the upper cover is fixedly installed with a socket, the inside of the valve body mounting cylinder is provided with an actuator valve body, the inside of the upper cover is provided with an intermittent rotating device, further comprising:

[0006] The actuator valve body realizes fine adjustment and self-resetting function through the precise transmission of the threaded screw rod and the elastic force of the spring;

[0007] The intermittent rotating device realizes the precise intermittent control of the actuator valve body by converting the rotating motion into intermittent linear or rotating motion through the cooperation of the rotating disc and the gear wheel driven by the motor.

[0008] Preferably, a plurality of mounting holes are formed on the two sides of the base, and a sealing base is fixedly installed at the top of the inside of the base.

[0009] Preferably, the intermittent rotating device comprises a motor, a rotating disc, a round pin and an arc plate, the motor is fixedly installed at the top of the inside of the upper cover, the output shaft of the motor is fixedly installed with the rotating disc, the side, away from the motor, of the rotating disc is fixedly installed with the round pin, and the other side is fixedly installed with the arc plate.

[0010] Preferably, the actuator valve body comprises a fixed disc, a fixed plate, a fixed slide rod and a moving plate, the fixed disc is fixedly installed at the top of the inside of the valve body mounting cylinder, a plurality of fixed slide rods are fixedly installed around the fixed disc, a fixed plate is fixedly installed at the middle of the plurality of fixed slide rods, the middle of the fixed plate is provided with an opening, and the moving plate is slidingly installed on the side, away from the fixed disc, of the fixed slide rod.

[0011] Preferably, the actuator valve body further comprises a threaded screw rod, a spring and a mounting column, the threaded screw rod is rotatably installed at the middle of the fixed disc, the other end of the threaded screw rod is rotatably installed with the moving plate, the bottom end of the moving plate is fixedly installed with the mounting column, the middle of the mounting column is hollowed out, the inside of the fixed disc, close to the plurality of fixed slide rods, is fixedly installed with the spring, and the other end of the spring is fixedly installed with the moving plate.

[0012] Preferably, the mounting column is fixedly installed with a sealing plate on the side, corresponding to the inside of the sealing base of the base, and the sealing plate corresponds to the groove of the sealing base.

[0013] Preferably, the other end of the threaded screw rod extends out of the side of the fixed disc and is fixedly installed with a gear wheel, a plurality of linear grooves are formed around the gear wheel, the diameters of the linear grooves correspond to the diameter of the round pin, an arc-shaped groove is formed around the plurality of linear grooves close to the gear wheel, and the arc-shaped groove corresponds to the arc plate.

[0014] Compared with the prior art, the intelligent electric actuator for new automobile energy thermal management has the following beneficial effects:

[0015] 1. The new intelligent electric actuator for vehicle energy thermal management, compared with the prior art CN210920131U, although the opening and closing control of the valve is realized by the cooperation of the moving magnet and the fixed magnet, but the fine adjustment and self-resetting functions still need to be improved, the fine adjustment and self-reseting functions of the actuator valve body are realized through the precise transmission of the threaded screw rod combined with the elastic force of the spring, this design not only improves the sealing performance and reliability of the valve, but also makes the valve tightly fit the sealing base when closed, effectively preventing the leakage of cooling liquid, compared with the technology in the prior art, the device exhibits higher precision and stability in fine adjustment and self-resetting, which is crucial for the precise control of the vehicle thermal management system.

[0016] 2. The new intelligent electric actuator for vehicle energy thermal management, compared with the prior art CN210920131U, although the opening and closing control of the valve is realized by the cooperation of the moving magnet and the fixed magnet, but the fine adjustment and self-resetting functions still need to be improved, the fine adjustment and self-reseting functions of the actuator valve body are realized through the precise transmission of the threaded screw rod combined with the elastic force of the spring, this design not only improves the sealing performance and reliability of the valve, but also makes the valve tightly fit the sealing base when closed, effectively preventing the leakage of cooling liquid, compared with the technology in the prior art, the device exhibits higher precision and stability in fine adjustment and self-resetting, which is crucial for the precise control of the vehicle thermal management system.

[0017] 3. The new intelligent electric actuator for vehicle energy thermal management, compared with the prior art CN210920131U, the intermittent rotation control may rely on a more complex electronic control system or mechanical structure, while the device realizes the precise intermittent control of the actuator valve body by rotating the rotating disc in cooperation with the mechanical components such as the grooved wheel, converting the rotary motion into intermittent linear or rotary motion, this mechanical transmission method not only has simple structure and high reliability, but also can maintain certain valve control function when the electronic control system fails, compared with the technology in the prior art, the device exhibits obvious advantages in the accuracy and reliability of intermittent rotation control, improving the safety and redundancy of the system. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a front view structure schematic diagram of the utility model;

[0019] Figure 2 It is a partial sectional view structure schematic diagram of the utility model;

[0020] Figure 3 It is a partial sectional view structure schematic diagram of the utility model;

[0021] Figure 4The utility model discloses an actuator valve body structure schematic diagram.

[0022] In the drawing: 1, pipeline; 2, base; 3, water outlet; 4, mounting port; 5, valve body mounting cylinder; 6, upper cover; 7, socket; 8, sealing base; 9, sealing plate; 10, actuator valve body; 11, intermittent rotating device; 12, motor; 13, rotating disc; 14, round pin; 15, arc plate; 16, groove wheel; 17, threaded screw rod; 18, spring; 19, fixed disc; 20, fixed plate; 21, fixed sliding rod; 22, moving plate; 23, mounting column. DETAILED DESCRIPTION

[0023] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0024] Please refer to Figures 1-4 A new intelligent electric actuator for automobile energy thermal management, including pipeline 1, the bottom end fixed mounting of pipeline 1 has base 2, one end fixed mounting of pipeline 1 has water outlet 3, the side fixed mounting of pipeline 1 away from water outlet 3 has mounting port 4, the top end fixed mounting of pipeline 1 middle part has valve body mounting cylinder 5, the top end fixed mounting of valve body mounting cylinder 5 has upper cover 6, the top end fixed mounting of upper cover 6 has socket 7, the inside of valve body mounting cylinder 5 is provided with actuator valve body 10, the inside of upper cover 6 is provided with intermittent rotating device 11, still includes:

[0025] Actuator valve body 10, through the accurate transmission of threaded screw rod 17 and the elastic force of spring 18, realizes the fine adjustment and self-resetting function of actuator valve body;

[0026] Intermittent rotating device 11, through the rotation of rotating disc 13 driven by motor 12 cooperates groove wheel 16, converts the rotary motion into intermittent linear or rotary motion, realizes the accurate intermittent control of actuator valve body.

[0027] Further, a group of mounting holes are formed in the two sides of base 2, a sealing base 8 is fixedly installed at the top end in base 2, a recess is formed in one side of sealing base 8, the mounting holes formed in the two sides of base 2 are designed to facilitate the quick positioning and stable installation of the actuator in the automobile thermal management system, the sealing base 8 at the top end in base 2 and the recess thereof provide a reliable sealing basis for the actuator, effectively prevent the leakage of coolant and improve the safety and reliability of the system.

[0028] Further, the intermittent rotating device 11 comprises a motor 12, a rotating disc 13, a round pin 14 and an arc plate 15, the motor 12 is fixedly installed at the top end inside the upper cover 6, the output shaft of the motor 12 is fixedly installed with the rotating disc 13, the side of the rotating disc 13 away from the motor 12 is fixedly installed with the round pin 14, and the other side is fixedly installed with the arc plate 15, the intermittent rotating device 11 realizes the precise intermittent control of the actuator valve body, the motor 12 drives the rotating disc 13 to rotate, and through the cooperation of the round pin 14, the arc plate 15 and the grooved wheel 16, the rotating motion is converted into intermittent linear or rotating motion, thereby improving the control precision and response speed of the actuator.

[0029] Further, the actuator valve body 10 comprises a fixed disc 19, a fixed plate 20, a fixed slide rod 21 and a moving plate 22, the top end inside the valve body mounting cylinder 5 is fixedly installed with the fixed disc 19, a group of fixed slide rods 21 are fixedly installed around the fixed disc 19, and the middle part of the plurality of groups of fixed slide rods 21 is fixedly installed with the fixed plate 20, the middle part of the fixed plate 20 is provided with an opening, and the side of the fixed slide rod 21 away from the fixed disc 19 is slidingly installed with the moving plate 22, the structural design of the actuator valve body 10 ensures the stability and durability of the valve body in the opening and closing process, the guiding effect of the fixed slide rod 21 enables the moving plate 22 to slide smoothly, thereby improving the sealing performance of the valve and the reliability of the opening and closing.

[0030] Further, the actuator valve body 10 further comprises a threaded lead screw 17, a spring 18 and a mounting column 23, the middle part of the fixed disc 19 is rotatably installed with the threaded lead screw 17, the other end of the threaded lead screw 17 is rotatably installed with the moving plate 22, the bottom end of the moving plate 22 is fixedly installed with the mounting column 23, the middle part of the mounting column 23 is hollow, the inside of the fixed disc 19 close to the plurality of groups of fixed slide rods 21 is fixedly installed with the spring 18, the other end of the spring 18 is fixedly installed with the moving plate 22, the combination of the threaded lead screw 17, the spring 18 and the mounting column 23 realizes the fine adjustment and self-resetting function of the actuator valve body, the precise transmission of the threaded lead screw 17, combined with the elastic force of the spring 18, enables the valve to tightly fit the sealing base 8 when closed, effectively preventing the leakage of cooling liquid, at the same time, the spring 18 also provides assistance when the valve is opened, thereby improving the response speed.

[0031] Further, the mounting column 23 is fixedly installed with a sealing plate 9 corresponding to one side of the sealing base 8 inside the base 2, the sealing plate 9 corresponds to the groove of the sealing base 8, and the sealing plate 9 at the bottom end of the mounting column 23 cooperates with the groove of the sealing base 8, thereby further enhancing the sealing performance of the valve, and such double sealing design ensures the safety of the cooling liquid during the flow process, preventing system failure or efficiency decline caused by leakage.

[0032] Further, the other end of the threaded rod 17 extends through one side of the fixed disc 19 and is fixedly installed with a grooved wheel 16, the periphery of the grooved wheel 16 is provided with straight slots, and the straight slots correspond to the diameter of the round pin 14, the periphery of the grooved wheel 16 close to the plurality of straight slots is provided with an arc-shaped slot, and the arc-shaped slot corresponds to the arc-shaped plate 15, the design of the grooved wheel 16, the straight slots on the periphery thereof correspond to the round pin 14, and the arc-shaped slot corresponds to the arc-shaped plate 15, so that the intermittent rotation control mechanism of the actuator valve body is realized, the mechanical transmission mode is simple in structure and high in reliability, even if the electronic control system fails, the valve control function can be maintained to a certain extent, and the safety and redundancy of the system are improved.

[0033] Structure description: 1, pipeline 1: function as providing a channel for cooling liquid flow, position relationship is the main part of the device, the bottom end is fixedly installed with a base 2, one end is fixedly installed with a water outlet 3, the side away from the water outlet 3 is fixedly installed with a mounting port 4, the top end of the middle part is fixedly installed with a valve body mounting cylinder 5;

[0034] 2, base 2: function as supporting and fixing the whole actuator, facilitating installation in the automobile thermal management system, position relationship is located at the bottom end of the pipeline 1, a group of mounting holes are formed on both sides, and a sealing base 8 is fixedly installed at the top end inside;

[0035] 3, water outlet 3: function as the outlet for cooling liquid flowing out of the device, position relationship is fixedly installed at one end of the pipeline 1;

[0036] 4, mounting port 4: function as providing a connection interface with other components or systems, position relationship is fixedly installed on the side away from the water outlet 3 of the pipeline 1;

[0037] 5, valve body mounting cylinder 5: function as installing and supporting the actuator valve body 10, position relationship is fixedly installed at the top end of the middle part of the pipeline 1;

[0038] 6, upper cover 6: function as covering and protecting the components inside the valve body mounting cylinder 5, position relationship is fixedly installed at the top end of the valve body mounting cylinder 5, and the intermittent rotation device 11 is arranged inside;

[0039] 7, socket 7: function as providing a power connection interface, position relationship is fixedly installed at the top end of the upper cover 6;

[0040] 8, actuator valve body 10: function as controlling the flow of cooling liquid to realize the opening and closing of the valve, position relationship is installed inside the valve body mounting cylinder 5, and the precise transmission of the threaded rod 17 and the elastic force of the spring 18 realize fine adjustment and self-resetting function;

[0041] 9, intermittent rotation device 11: function as the implementation of the actuator valve body 10 of the precise intermittent control, position relationship is installed in the inside of the upper cover 6, through the motor 12 drive rotating disc 13 rotation matching slot wheel 16, the rotation movement into intermittent linear or rotation movement;

[0042] 10, motor 12: function as the drive rotating disc 13 rotation, position relationship is fixedly installed in the top of the inside of the upper cover 6, the output shaft is fixedly installed with rotating disc 13;

[0043] 11, rotating disc 13: function as the transmission motor 12 of the rotation movement, position relationship is fixedly installed on the output shaft of the motor 12, the side away from the motor 12 is fixedly installed with round pin 14 and arc plate 15;

[0044] 12, round pin 14: function as with the linear slot of slot wheel 16 matching, realize intermittent rotation, position relationship is fixedly installed in the side away from the motor 12 of rotating disc 13;

[0045] 13, arc plate 15: function as with the arc slot of slot wheel 16 matching, push slot wheel 16 intermittent rotation, position relationship is fixedly installed on the other side of rotating disc 13;

[0046] 14, fixed disc 19: function as supporting and fixing other components of the actuator valve body 10, position relationship is fixedly installed in the top of the inside of the valve body installation cylinder 5;

[0047] 15, fixed plate 20: function as providing the support of the sliding of moving plate 22, position relationship is fixedly installed in the middle of the multiple sets of fixed slide rod 21, the middle is provided with opening;

[0048] 16, fixed slide rod 21: function as guiding the stable sliding of moving plate 22, position relationship is fixedly installed around fixed disc 19;

[0049] 17, moving plate 22: function as driving valve opening and closing, position relationship is slidingly installed in the side away from fixed disc 19 of fixed slide rod 21, the bottom end is fixedly installed with installation column 23;

[0050] 18, threaded rod 17: function as transmission rotation movement, realize the fine adjustment of the actuator valve body 10, position relationship is rotatingly installed in the middle of fixed disc 19, the other end is rotatingly installed with moving plate 22;

[0051] 19, spring 18: function as providing the power assistance when closing the valve and the reset power assistance when opening, position relationship is fixedly installed in the inside of fixed disc 19 close to multiple sets of fixed slide rod 21, the other end is fixedly installed with moving plate 22;

[0052] 20, mounting column 23: function as a connection between the mobile plate 22 and the sealing plate 9, the position relationship is fixedly installed at the bottom end of the mobile plate 22, the middle is hollowed out;

[0053] 21, sealing plate 9: function as to enhance the sealing performance of the valve, the position relationship is fixedly installed in the corresponding bottom seat 2 inside the sealing base 8 on one side, matched with the groove of the sealing base 8;

[0054] 22, sealing base 8: function as to provide the basis for valve sealing, the position relationship is fixedly installed at the top end inside the base 2, one side is provided with a groove;

[0055] 23, groove wheel 16: function as to realize the intermittent rotation control mechanism of the actuator valve body 10, the position relationship is fixedly installed at the other end of the threaded screw rod 17, the periphery is provided with linear slot and arc slot, matched with the round pin 14 and the arc plate 15.

[0056] Working principle: the actuator valve body 10 is composed of fixing disc 19, fixing plate 20, fixed slide rod 21, moving plate 22, threaded screw rod 17, spring 18 and mounting column 23, when the valve needs to be opened or closed, the threaded screw rod 17 is driven to rotate by external control signal, the rotary motion of the threaded screw rod 17 is converted into the linear sliding motion of the moving plate 22 on the fixed slide rod 21 through the rotary connection between the threaded screw rod 17 and the moving plate 22, the sliding of the moving plate 22 drives the mounting column 23 and the sealing plate 9 to move, so as to realize the opening or closing of the valve, the spring 18 provides power when the valve is closed, so that the sealing plate 9 closely contacts the sealing base 8, and the sealing performance of the valve is ensured, when the valve is opened, the spring 18 also helps the quick reset of the moving plate 22, the intermittent rotation device 11 is composed of motor 12, rotating disc 13, round pin 14, arc plate 15 and grooved wheel 16, the motor 12 receives external control signal and drives the rotating disc 13 to rotate, the rotation of the rotating disc 13 drives the round pin 14 and the arc plate 15 to move, the round pin 14 is inserted into the linear slot of the grooved wheel 16, the arc plate 15 is matched with the arc slot of the grooved wheel 16, when the round pin 14 slides in the linear slot, the grooved wheel 16 remains stationary, when the round pin 14 slides out of the linear slot and enters the next linear slot, the grooved wheel 16 is intermittently rotated under the pushing of the arc plate 15, the intermittent rotation of the grooved wheel 16 is converted into the intermittent motion of the actuator valve body 10 through the connection between the grooved wheel 16 and the threaded screw rod 17 or other transmission components, so as to realize the accurate intermittent control of the valve, when the automobile thermal management system needs to adjust the cooling liquid flow, the control system sends control signal to the motor 12 of the intermittent rotation device 11, the motor 12 drives the rotating disc 13 to rotate, the intermittent motion of the actuator valve body 10 is realized through the cooperation of the round pin 14, the arc plate 15 and the grooved wheel 16, the intermittent motion of the actuator valve body 10 drives the moving plate 22 and the sealing plate 9 to move, so as to adjust the opening of the valve and control the flow of the cooling liquid, the spring 18 provides power when the valve is closed, so as to ensure the sealing performance of the valve, and provides reset power when the valve is opened, so as to improve the response speed, the cooperation between the sealing base 8 inside the base 2 and the sealing plate 9 further enhances the sealing performance of the valve and prevents the leakage of the cooling liquid.

[0057] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A novel intelligent electric actuator for automotive energy thermal management, comprising a pipe (1), a base (2) fixedly installed at the bottom end of the pipe (1), a water outlet (3) fixedly installed at one end of the pipe (1), an installation port (4) fixedly installed on the side of the pipe (1) away from the water outlet (3), a valve body mounting cylinder (5) fixedly installed at the top end of the middle part of the pipe (1), a top cover (6) fixedly installed at the top end of the valve body mounting cylinder (5), a socket (7) fixedly installed at the top end of the top cover (6), an actuator valve body (10) disposed inside the valve body mounting cylinder (5), and an intermittent rotation device (11) disposed inside the top cover (6), characterized in that, Also includes: The actuator valve body (10) achieves fine adjustment and self-reset function through the precise transmission of the threaded screw (17) combined with the elastic force of the spring (18); The intermittent rotation device (11) drives the turntable (13) to rotate in conjunction with the grooved wheel (16) via the motor (12), converting the rotational motion into intermittent linear or rotational motion, thereby achieving precise intermittent control of the actuator valve body.

2. The intelligent electric actuator for automotive energy thermal management according to claim 1, characterized in that: The base (2) has a set of mounting holes on both sides, and a sealing base (8) is fixedly installed at the top inside the base (2). The sealing base (8) has a groove on one side.

3. The intelligent electric actuator for automotive energy thermal management according to claim 1, characterized in that: The intermittent rotation device (11) includes a motor (12), a turntable (13), a round pin (14), and an arc plate (15). The motor (12) is fixedly installed at the top inside the upper cover (6). The turntable (13) is fixedly installed on the output shaft of the motor (12). The round pin (14) is fixedly installed on one side of the turntable (13) away from the motor (12), and the arc plate (15) is fixedly installed on the other side.

4. The intelligent electric actuator for automotive energy thermal management according to claim 1, characterized in that: The actuator valve body (10) includes a fixed disc (19), a fixed plate (20), a fixed slide rod (21), and a movable plate (22). The fixed disc (19) is fixedly installed at the top of the valve body mounting cylinder (5). A set of fixed slide rods (21) are fixedly installed around the fixed disc (19), and a fixed plate (20) is fixedly installed in the middle of the multiple sets of fixed slide rods (21). The fixed plate (20) has an opening in the middle. The movable plate (22) is slidably installed on the side of the fixed slide rod (21) away from the fixed disc (19).

5. A novel intelligent electric actuator for automotive energy thermal management according to claim 4, characterized in that: The actuator valve body (10) also includes a threaded screw (17), a spring (18) and a mounting post (23). The threaded screw (17) is rotatably mounted in the middle of the fixed plate (19), and the other end of the threaded screw (17) is rotatably mounted together with the moving plate (22). The mounting post (23) is fixedly mounted at the bottom of the moving plate (22). The middle of the mounting post (23) is hollowed out. The spring (18) is fixedly mounted inside the fixed plate (19) near the multiple sets of fixed slide rods (21). The other end of the spring (18) is fixedly mounted together with the moving plate (22).

6. A novel intelligent electric actuator for automotive energy thermal management according to claim 5, characterized in that: The mounting post (23) is fixedly fitted with a sealing plate (9) on one side of the sealing base (8) inside the base (2), and the sealing plate (9) corresponds to the groove of the sealing base (8).

7. A novel intelligent electric actuator for automotive energy thermal management according to claim 5, characterized in that: The other end of the threaded screw (17) extends through one side of the fixed plate (19) and is fixedly installed with a grooved wheel (16). The grooved wheel (16) has straight grooves around its perimeter, and the straight grooves correspond to the diameter of the round pin (14). The grooved wheel (16) has arc grooves around its perimeter near the multiple sets of straight grooves, and the arc grooves correspond to the arc plate (15).

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