Guiding and limiting structure of lead frame of electronic actuator

Abstract

The utility model relates to a guiding and limiting structure of a lead frame of an electronic actuator, which comprises an upper cover, a lower cover and a lead frame, the limiting element is arranged in the convex part I; the pin is used for inserting the end part of the power supply terminal and is positioned in the limiting element, and the limiting element is used for positioning the pin; the limiting element comprises an installation body, a limiting plate and a second protruding part, the limiting plate is connected with the first protruding part, the second protruding part is arranged on the end face, away from the installation body, of the limiting plate, the pin penetrates through the installation body, the limiting plate and the second protruding part, and after the pin is connected with the plug-in power supply terminal in a plug-in mode, the outer side wall of the pin makes contact with the inner wall of the installation body. According to the guiding and limiting structure of the lead frame of the electronic actuator, in order to control deviation and warping of vibration, the movement of the pins is limited by the limiting element, and meanwhile, the limiting element plays a role in guiding; the problem that the electrical continuity of the electronic actuator is unstable under the high-temperature vibration condition is solved; and the reliability and the service life of the electronic actuator product are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding, in particular to a guiding and limiting structure for a lead frame of an electronic actuator. Background Art

[0002] An actuator (final controlling element) is a device in an automation technology tool that receives control information and exerts a control action on a controlled object. An actuator is also an instrument in the forward path of a control system that directly changes the manipulated variable.

[0003] The actuator is one of the most important components in a diesel engine electronic speed control system, and its structure, process, reliability, and energy consumption directly affect the speed control performance of the diesel engine.

[0004] Among them, the lead frame in the electronic actuator is dedicated to two pins of the motor power supply, protruding from the plastic inside the actuator, and is appropriately shaped to make electrical contact with the power supply terminals of the motor. The contacts must be able to ensure electrical continuity under variable temperature conditions up to 200°C (and the resulting thermal expansion) and very strong vibration conditions (typical of internal combustion engines). For this purpose, Faist created a contact through a suitably shaped fork structure to produce elastic compression on the coupled terminal, thus ensuring the contact. However, under high-temperature and vibration conditions, the contact between the lead frame pins of the actuator and the power supply terminals of the motor is often unstable. Summary of the Utility Model

[0005] Therefore, the technical problem to be solved by the utility model is to overcome the problem in the prior art that the structural design of the actuator causes unstable connection when the pins of the lead frame contact the power supply terminals, which is likely to cause virtual connection.

[0006] To solve the above technical problem, the utility model provides a guiding and limiting structure for a lead frame of an electronic actuator, including: an upper cover, which is provided with a first convex part; a limiting element, which is arranged inside the first convex part; a pin, the end for plugging into the power supply terminal is located inside the limiting element, and the limiting element is used for positioning the pin; the limiting element includes an installation body, a limiting plate, and a second convex part. One end of the installation body is arranged inside the first convex part, the limiting plate is arranged at the end of the installation body extending out of the first convex part, and the limiting plate is connected to the first convex part. The second convex part is arranged on the end face of the limiting plate away from the installation body. The pin penetrates through the installation body and the limiting plate, and the end of the pin extends into the second convex part. After the pin is plugged into the power supply terminal to be plugged, the outer side wall of the pin contacts the inner wall of the installation body.

[0007] In an embodiment of the present utility model, a welding convex portion is provided on the end surface of the limiting plate opposite to the first convex portion, and the welding convex portion and the end surface of the first convex portion are ultrasonically welded.

[0008] In an embodiment of the present utility model, the first convex portion is a rectangular body, and a first groove is provided at the center of the first convex portion. The first groove is a rectangular groove, and the mounting body is arranged in the first groove.

[0009] In an embodiment of the present utility model, convex ribs are provided on three of the inner walls of the first groove. The convex ribs are arched, and the convex ribs extend from the bottom surface of the first groove to the top surface of the first groove.

[0010] In an embodiment of the present utility model, the mounting body is a rectangular body, and second grooves are provided on three of the outer side walls of the mounting body. The second grooves are arc-shaped grooves, and the second grooves and the convex ribs are arranged in one-to-one correspondence, and the convex ribs are arranged in the second grooves.

[0011] In an embodiment of the present utility model, rounded corners are provided at the four corner positions of the mounting body.

[0012] In an embodiment of the present utility model, a through hole one is provided among the mounting body, the limiting plate and the second convex portion, and the pin is located in the through hole one.

[0013] In an embodiment of the present utility model, a through hole two is provided among the mounting body, the limiting plate and the second convex portion, and the through hole two is used to avoid inserting a power terminal.

[0014] In an embodiment of the present utility model, the through hole one and the through hole two are arranged in a cross shape.

[0015] In an embodiment of the present utility model, both the through hole one and the through hole two are rectangular holes, the pins are two symmetrically arranged, and the two pins are respectively located on both sides of the center point of the through hole one.

[0016] The above technical solution of the present utility model has the following beneficial effects compared with the prior art:

[0017] For the guiding and limiting structure of the lead frame of the electronic actuator of the present utility model, in order to control the deviation and warping of vibration, the movement of the pins is restricted by the limiting elements, and at the same time, the limiting elements play a guiding role; the instability of the electrical continuity of the electronic actuator under high-temperature vibration conditions is solved; the reliability and service life of the electronic actuator product are improved. Description of the Drawings

[0018] In order to make the content of the present utility model easier to be clearly understood, the following further details the present utility model according to the specific embodiments of the present utility model and in conjunction with the drawings, wherein

[0019] Figure 1 This is a schematic structural diagram of the guiding and limiting structure of the lead frame of the electronic actuator in the preferred embodiment of the present utility model;

[0020] Figure 2 This is a partial structural schematic diagram of the guiding and limiting structure of the lead frame of the electronic actuator in the preferred embodiment of the present utility model Figure 1 ;

[0021] Figure 3 This is a partial structural schematic diagram of the guiding and limiting structure of the lead frame of the electronic actuator in the preferred embodiment of the present utility model Figure 2 ;

[0022] Figure 4 This is a structural schematic diagram of the limiting element in the preferred embodiment of the present utility model Figure 1 ;

[0023] Figure 5 This is a structural schematic diagram of the limiting element in the preferred embodiment of the present utility model Figure 2 。

[0024] Explanation of the reference numerals in the drawings of the specification: upper cover 1, first convex part 11, first groove 111, convex rib 112, limiting element 2, mounting body 21, second groove 211, first through hole 212, second through hole 213, limiting plate 22, welding convex part 221, second convex part 23, pin 3. Detailed implementation manners

[0025] The following further describes the present utility model in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the present utility model and be able to implement it, but the embodiments cited are not intended to limit the present utility model.

[0026] Referring to Figures 1-3 As shown, the guiding and limiting structure of the lead frame of the electronic actuator of the present utility model includes three parts: an upper cover 1, a limiting element 2, and a pin 3; for the upper cover 1, a first convex part 11 is provided thereon; for the limiting element 2, it is arranged within the first convex part 11; for the pin 3, the end for plugging into the power supply terminal is located within the limiting element 2, and the limiting element 2 is used for positioning the pin 3. The limiting element 2 is made of rubber or silica gel. By providing the limiting element 2, the pin 3 can be limited within the first convex part 11, thereby ensuring the stability of the pin 3. And when the pin 3 and the plugging power supply terminal are plugged together, through the limiting element 2 being pressed between the connectors, a sealing effect is achieved.

[0027] Referring to Figures 2-5As shown in the figure, the limiting element 2 includes a mounting body 21, a limiting plate 22 and a second convex part 23. One end of the mounting body 21 is arranged in the first convex part 11. The limiting plate 22 is arranged at the end of the mounting body 21 extending out of the first convex part 11, and the limiting plate 22 is connected to the first convex part 11. The second convex part 23 is arranged on the end face of the limiting plate 22 away from the mounting body 21. The pin 3 penetrates through the mounting body 21 and the limiting plate 22, and the end of the pin 3 extends into the second convex part 23. After the pin 3 is inserted into the plug-in power terminal, the outer side wall of the pin 3 contacts the inner wall of the mounting body 21. The mounting body 21 and the second convex part 23 are respectively arranged on two opposite end faces of the limiting plate 22. When the mounting body 21 is arranged in the first convex part 11, the limiting plate 22 just contacts the end face of the first convex part 11.

[0028] In the above structure, a welding convex part 221 is arranged on the end face of the limiting plate 22 opposite to the first convex part 11, and the welding convex part 221 and the end face of the first convex part 11 are ultrasonically welded. By arranging the welding convex part 221, the welding stability between the limiting plate 22 and the first convex part 11 can be increased.

[0029] In the above structure, the first convex part 11 is a rectangular body, and a first groove 111 is arranged at the center of the first convex part 11. The first groove 111 is a rectangular groove, and the mounting body 21 is arranged in the first groove 111.

[0030] In the above structure, convex ribs 112 are arranged on three of the inner walls of the first groove 111. The convex ribs 112 are arranged in an arched shape, and the convex ribs 112 extend from the bottom surface of the first groove 111 to the top surface of the first groove 111. The mounting body 21 is a rectangular body, and arc-shaped grooves 211 are arranged on three of the outer side walls of the mounting body 21. The arc-shaped grooves 211 and the convex ribs 112 are arranged in one-to-one correspondence, and the convex ribs 112 are arranged in the arc-shaped grooves 211. By arranging the structure of the convex ribs 112 and the arc-shaped grooves 211, when installing the limiting element 2, the three convex ribs 112 can be aligned with the three arc-shaped grooves 211, so that the installation position can be found, and thus the installation between the limiting element 2 and the first convex part 11 can be quickly realized, avoiding misinstallation.

[0031] In the above structure, chamfered corners are arranged at the four corner positions of the mounting body 21. And arc-shaped surfaces are used for transition at the transition positions between the convex ribs 112 and the mounting body 21.

[0032] In the above structure, a through hole one 212 is provided among the mounting body 21, the limiting plate 22 and the second convex part 23, and the pin 3 is located in the through hole one 212. A through hole two 213 is provided among the mounting body 21, the limiting plate 22 and the second convex part 23, and the through hole two 213 is used to avoid interfering with the inserted power terminal. The through hole one 212 and the through hole two 213 are arranged in a cross shape. Both the through hole one 212 and the through hole two 213 are rectangular holes, the pins 3 are two symmetrically arranged ones, and the two pins 3 are respectively located on both sides of the center point of the through hole one 212. The inserted power terminal is inserted between the two pins 3, and the edge of the inserted power terminal is located in the through hole two 213, so as to avoid interference. The second convex part 23 is arranged along the cross-shaped outer shape presented by the through hole one 212 and the through hole two 213, so the outer shape of the second convex part 23 is also in the shape of a "plus" sign.

[0033] Obviously, the above embodiments are only examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present utility model.

Claims

1. A guiding and limiting structure for an electronic actuator lead frame, characterized in that: including an upper cover provided with a first convex part thereon a limiting element disposed within the first convex part a pin, the end for plugging into a power terminal is located within the limiting element, and the limiting element is used for positioning the pin the limiting element includes a mounting body, a limiting plate and a second convex part. One end of the mounting body is disposed within the first convex part. The limiting plate is disposed at the end of the mounting body extending out of the first convex part, and the limiting plate is connected to the first convex part. The second convex part is disposed on the end face of the limiting plate away from the mounting body. The pin penetrates through the mounting body and the limiting plate, and the end of the pin extends into the second convex part. After the pin is plugged into the power terminal, the outer side wall of the pin is in contact with the inner wall of the mounting body 2. The guiding and limiting structure of the electronic actuator lead frame according to claim 1, characterized in that: a welding convex part is provided on the end face of the limiting plate opposite to the first convex part, and the welding convex part and the end face of the first convex part are ultrasonically welded 3. The guiding and limiting structure of the electronic actuator lead frame according to claim 1, wherein: the first convex part is a rectangular body, and a first groove is provided at the center of the first convex part. The first groove is a rectangular groove, and the mounting body is disposed within the first groove 4. The guiding and limiting structure of the lead frame of the electronic actuator according to claim 3, characterized in that: convex ridges are provided on three of the inner walls of the first groove. The convex ridges are arched and extend from the bottom surface of the first groove to the top surface of the first groove 5. The guiding and limiting structure of the lead frame of the electronic actuator according to claim 4, characterized in that: the mounting body is a rectangular body, and second grooves are provided on three of the outer side walls of the mounting body. The second grooves are arc-shaped grooves, and the second grooves and the convex ridges are arranged in one-to-one correspondence, and the convex ridges are disposed within the second grooves 6. The guiding and limiting structure of the lead frame of the electronic actuator according to claim 5, characterized in that: rounded corners are provided at the four corner positions of the mounting body 7. The guiding and limiting structure of the lead frame of the electronic actuator according to claim 1, characterized in that: a through hole one is provided among the mounting body, the limiting plate and the second convex part, and the pin is located within the through hole one 8. The guiding and limiting structure of the electronic actuator lead frame according to claim 7, characterized in that: a through hole two is provided among the mounting body, the limiting plate and the second convex part, and the through hole two is used to avoid the power terminal to be plugged 9. The guiding and limiting structure of the lead frame of the electronic actuator according to claim 8, characterized in that: the through hole one and the through hole two are arranged in a cross shape 10. The guiding and limiting structure of the electronic actuator lead frame according to claim 1, characterized in that: both the through hole one and the through hole two are rectangular holes, the pins are two symmetrically arranged, and the two pins are respectively located on both sides of the center point of the through hole one

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