Special ultralow temperature coefficient resistor for automobile ECU (Electronic Control Unit)

Abstract

The utility model relates to the technical field of automobile electronics, in particular to an ultralow temperature coefficient resistor special for an automobile ECU (Electronic Control Unit). The resistor comprises a resistor body, an interface is fixedly connected to the surface of the resistor body, an access end is inserted into an inner cavity of the interface, a clamping and limiting assembly is arranged on the surface of the interface, and the clamping and limiting assembly is composed of two parts and comprises a connecting frame fixedly connected to the surface of the interface and a fixing frame fixedly connected to the surface of the access end. And a fixing frame is inserted into an inner cavity of the connecting frame. The connecting end and the connector are connected in an inserted and welded mode, meanwhile, the fixing frame and the connecting frame are embedded in a sleeved mode, a double-fixing mechanism is formed, and therefore the situation that due to continuous and complex vibration of an automobile, the connector and the connecting end are separated is effectively avoided; and relative positions of the two can be maintained.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile electronic technology, specifically, relate to a kind of super low temperature coefficient resistance special for automobile ECU. BACKGROUND

[0002] The super low temperature coefficient resistance special for automobile ECU (Electronic Control Unit) is a resistor specially designed for automobile ECU with extremely low temperature coefficient. The resistance value of ordinary resistance will change significantly with temperature, while the resistance value of super low temperature coefficient resistance changes very little within a wide temperature range. This is achieved by using special materials and manufacturing processes, ensuring that the resistance value remains stable under various operating conditions of the automobile, even with significant fluctuations in ambient temperature. The ECU provides accurate electrical parameters, with very high resistance accuracy, accurately controlling current, voltage and other parameters in the circuit, ensuring accurate and reliable signal processing and control functions of the ECU. Generally, its resistance accuracy can reach ±0.1% or even higher, meeting the high-precision requirements of automobile electronic systems.

[0003] Considering the continuous and complex vibrations generated during automobile driving, the current common connection method between resistance and access end is mainly welding. The welding connection relies on the melting of solder at high temperature to fix the connection between the access and output terminals of the resistance and the circuit board. However, the vibrations generated during automobile driving are multidirectional and continuous. Under the long-term vibration effect, the welding part will gradually develop fatigue cracks due to repeated stress impact, and with the passage of time, the cracks will continuously expand, eventually leading to loose welding points and unstable connection between the access and output terminals of the resistance. SUMMARY

[0004] The purpose of the utility model is to solve the problem that resistance and access end are mainly fixed by high-temperature melting of solder, but the vibrations during automobile driving are complex and continuous, the welding part is subjected to multidirectional stress impact, and the solder is prone to fatigue cracks. With the passage of time, the cracks expand, leading to loose welding points and unstable connection between the access and output terminals of the resistance.

[0005] To achieve the above purpose, the utility model provides a super low temperature coefficient resistance special for automobile ECU, which comprises a resistance main body, an interface fixedly connected to the surface of the resistance main body, an access end inserted into the inner cavity of the interface, and a clamping limiting assembly arranged on the surface of the interface.

[0006] The clamping limiting assembly is composed of two parts, including a connecting frame fixedly connected to the surface of the interface, and a fixing frame fixedly connected to the surface of the access end, and the inner cavity of the connecting frame is inserted with the fixing frame.

[0007] The access end and the interface first carry out plugging operation, in this process, because the access end surface is fixedly connected with the fixed frame, and the interface surface is fixedly connected with the connecting frame, the insertion action of the access end synchronously drives the fixed frame to be plugged into the inner cavity of the connecting frame, so that the mutual embedding of the fixed frame and the connecting frame is realized, then, the access end and the interface which have completed plugging and made the fixed frame and the connecting frame mutually embedded are welded, the double operations of plugging and welding, and the mutual embedding of the fixed frame and the connecting frame jointly constitute the double fixation between the access end and the interface.

[0008] As a further improvement of the technical solution, the connecting frame surface is provided with a limiting groove, and the fixed frame surface is fixedly connected with a limiting column;

[0009] The limiting column surface is plugged into the inner wall of the limiting groove;

[0010] The inner wall of the limiting groove is fixedly connected with two protrusions, and when the limiting column slides on the inner wall of the limiting groove and contacts the protrusions, the limiting column passes through the surface of the protrusions and is located in the inner cavity of the limiting groove;

[0011] The limiting groove and the protrusions are made of engineering plastic material and have a certain elasticity;

[0012] By manually rotating the access end, the fixed frame connected with the access end is driven to approach the connecting frame, and the fixed frame is rotated to make the limiting column slide along the inner wall of the limiting groove, in this process, the limiting column gradually approaches and contacts the protrusions on the inner wall of the limiting groove, because the protrusions are in a protruding structure, and the limiting groove and the protrusions are made of plastic material, when the limiting column contacts the protrusions, the protrusions will be extruded, so that the limiting column passes through the protrusions and enters the inner cavity of the limiting groove.

[0013] As a further improvement of the technical solution, the limiting column surface is fixedly connected with a baffle, and the baffle bottom contacts the surface of the connecting frame;

[0014] When the limiting column is inserted into the inner cavity of the limiting groove, at this time, the baffle gradually approaches the surface of the connecting frame, and when the baffle bottom completely matches the surface of the connecting frame, the limiting column cannot continue to penetrate into the limiting groove, so that the position of the limiting column is limited.

[0015] Compared with the prior art, the utility model has the advantages of:

[0016] In the automobile ECU special super low temperature coefficient resistor, the access end and the interface adopt the plug-in and welding mode, and the fixing frame and the connecting frame are nested with each other, forming a double fixing mechanism, which effectively avoids the separation of the interface and the access end due to the continuous and complex vibration of the automobile, the limiting structure formed by the nested connection of the connecting frame and the fixing frame can maintain the relative position of the access end and the interface during welding, and even if the welding point is loose due to vibration under the complex vibration condition of the automobile, the nested structure of the connecting frame and the fixing frame can still maintain the connection of the access end and the interface, which improves the reliability of the resistor in the subsequent use process. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic view of the overall structure of the utility model;

[0018] Figure 2 It is a schematic view of the clamping and limiting assembly structure of the utility model;

[0019] Figure 3 It is a schematic view of the enlarged structure of A of the utility model;

[0020] Figure 4 It is a schematic view of the connecting frame structure of the utility model.

[0021] The meanings of various reference numerals in the drawing are as follows:

[0022] 1, resistor main body; 11, interface; 12, access end;

[0023] 2, clamping and limiting assembly; 21, connecting frame; 210, limiting groove; 2101, protruding block; 22, fixing frame; 220, limiting column; 221, baffle; DETAILED DESCRIPTION

[0024] The technical solutions 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, 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 protection of the utility model.

[0025] EMBODIMENT

[0026] Please refer to Figures 1-4 The embodiment provides an automobile ECU special super low temperature coefficient resistor, which comprises a resistor main body 1, the surface of the resistor main body 1 is fixedly connected with an interface 11, the interface 11 is plugged with an access end 12 in the cavity, and the surface of the interface 11 is provided with a clamping and limiting assembly 2.

[0027] The clamping limiting assembly 2 is composed of two parts, including a connecting frame 21 fixedly connected to the surface of the interface 11, and a fixed frame 22 fixedly connected to the surface of the access end 12, and the inner cavity of the connecting frame 21 is inserted with the fixed frame 22;

[0028] Firstly, the access end 12 is inserted into the inner cavity of the interface 11, at this time the movement of the access end 12 will simultaneously drive the fixed frame 22 on the surface thereof to be inserted into the inner cavity of the connecting frame 21, and the surface of the fixed frame 22 is inserted into the inner cavity of the connecting frame 21, so as to realize the mutual nesting of the connecting frame 21 and the fixed frame 22, then the access end 12 is welded with the interface 11, and the connecting frame 21 and the fixed frame 22 are nested with each other to form a limiting structure, even if there is a risk of separation between the access end 12 and the interface 11 under complex vibration conditions of the automobile, the nesting structure can still maintain the connection, guarantee the welding quality and subsequent use reliability, and support the stable operation of the resistance.

[0029] The improvement of the embodiment is that:

[0030] Considering that continuous and complex vibrations will be generated during the driving of the automobile, the current common connection mode of the resistance and the access end is mainly welding, and the welding connection relies on the melting of the solder at high temperature to fix the connection between the access and output ends of the resistance and the circuit on the circuit board. However, the vibrations generated during the driving of the automobile are multidirectional and continuous, and under the long-term vibration effect, the solder will gradually appear fatigue cracks due to repeated stress impact at the welding position, and with the passage of time, the cracks will continuously expand, eventually leading to loosening of the welding point and unstable connection of the access and output ends of the resistance. Therefore, the plug-in and welding mode of the access end 12 and the interface 11 is adopted, and the fixed frame 22 and the connecting frame 21 are nested with each other to form a double fixation mechanism, which effectively avoids the separation of the interface 11 and the access end 12 due to continuous and complex vibrations of the automobile. The limiting structure formed by the mutual nesting of the connecting frame 21 and the fixed frame 22 can maintain the relative positions of the access end 12 and the interface 11 during welding, and even if the welding point is at risk of loosening due to vibrations under complex vibration conditions of the automobile, the nesting structure of the fixed frame 22 and the connecting frame 21 can still maintain the connection between the access end 12 and the interface 11, which improves the reliability of the resistance during subsequent use.

[0031] In order to enable the fixed frame 22 and the connecting frame 21 to be inserted and nested with each other, the parts of the fixed frame 22 and the connecting frame 21 need to be further disclosed, so that a limiting groove 210 is formed on the surface of the connecting frame 21, and a limiting column 220 is fixedly connected to the surface of the fixed frame 22;

[0032] The limiting column 220 is inserted on the inner wall of the limiting groove 210, and when the surface of the access end 12 is inserted into the inner cavity of the interface 11, the fixed frame 22 will be driven to approach the connecting frame 21. In this process, the limiting column 220 will gradually approach the inner cavity of the limiting groove 210, and will be inserted into the inner cavity of the limiting groove 210.

[0033] When the limiting column 220 is located in the inner cavity of the limiting groove 210, the access end 12 needs to be fixed in the inner cavity of the interface 11, so that the access end 12 can be prevented from being separated from the interface 11 when the car shakes. Therefore, two protrusions 2101 are fixedly connected to the inner wall of the limiting groove 210, and when the limiting column 220 slides on the inner wall of the limiting groove 210 and contacts the protrusions 2101, the limiting column 220 passes over the surface of the protrusions 2101 and is located in the inner cavity of the limiting groove 210.

[0034] By manually rotating the access end 12, the fixed frame 22 connected to the access end 12 is driven to approach the connecting frame 21, and the fixed frame 22 is rotated to make the limiting column 220 slide along the inner wall of the limiting groove 210. In this process, the limiting column 220 gradually approaches and contacts the protrusions 2101 on the inner wall of the limiting groove 210. Since the protrusions 2101 have a protruding structure, the limiting column 220 will exert a pressing force on the protrusions 2101 when it contacts the protrusions 2101. With the continuous rotation of the access end 12, the limiting column 220 overcomes the obstruction of the protrusions 2101 and passes through the protrusions 2101 to enter the groove of the limiting groove 210. Thereafter, the protrusions 2101 on the surface of the limiting groove 210 form an obstruction to the limiting column 220, so that the limiting column 220 cannot slide out of the inner cavity of the limiting groove 210 when the resistance main body 1 shakes.

[0035] In order to make the limiting column 220 extrude the protrusions 2101 during the process of sliding along the inner wall of the limiting groove 210, the protrusions 2101 need to be shrunk when extruded by the limiting column 220. Therefore, the limiting groove 210 and the protrusions 2101 are made of engineering plastic material and have a certain elasticity.

[0036] By setting the limiting groove 210 and the protrusions 2101 to be made of plastic material, the limiting column 220 can extrude the protrusions 2101 when it slides in the inner cavity of the limiting groove 210 and contacts the protrusions 2101. Then, based on the elastic properties of the plastic material, the protrusions 2101 will elastically deform and shrink to a certain extent when subjected to the extrusion force of the limiting column 220. When the limiting column 220 continuously slides and passes over the protrusions 2101, the protrusions 2101 will restore to the original shape by relying on their own elasticity, thereby forming an obstruction to the limiting column 220.

[0037] Considering that the position of the limiting column 220 needs to be limited when the limiting column 220 is inserted into the inner cavity of the limiting groove 210, the surface of the limiting column 220 is fixedly connected with a baffle 221, the bottom of the baffle 221 contacts the surface of the connecting frame 21, when the limiting column 220 is inserted into the inner cavity of the limiting groove 210, at this time, the baffle 221 will gradually approach the surface of the connecting frame 21, when the bottom of the baffle 221 completely adheres to the surface of the connecting frame 21, the limiting column 220 cannot continue to penetrate into the limiting groove 210, and the position of the limiting column 220 is limited, at this time, the end portion of the access end 12 will be attached to the inner cavity of the interface 11.

[0038] The automobile ECU special ultra-low temperature coefficient resistance of the utility model in specific use, first, handheld access end 12 makes its surface insert into the inner cavity of interface 11, in this process, will drive fixed frame 22 to approach connecting frame 21, until the surface of limiting column 220 is inserted into the inner cavity of limiting groove 210, and rotates fixed frame 22 and makes limiting column 220 slide along the inner wall of limiting groove 210, in this process, limiting column 220 gradually approaches and contacts the protruding block 2101 of the inner wall of limiting groove 210, because the protruding block 2101 is convex structure, when limiting column 220 contacts protruding block 2101, will apply extrusion force to it, along with the continuous rotation of access end 12, limiting column 220 overcomes the hindrance of protruding block 2101 and passes through protruding block 2101, enters the groove of limiting groove 210, at this time, access end 12 and interface 11 are welded.

[0039] The basic principle, main features and advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited by the above embodiments, the above embodiments and descriptions in the specification are only preferred examples of the utility model, and are not used to limit the utility model, various changes and improvements of the utility model can be made without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The protection scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A super low temperature coefficient resistance for automotive ECU, comprising a resistance body (1), characterized in that: The interface (11) is internally inserted with an access end (12), and the surface of the interface (11) is provided with a clamping limiting component (2). The clamping limiting component (2) is composed of two parts, including a connecting frame (21) fixedly connected to the surface of the interface (11), and a fixing frame (22) fixedly connected to the surface of the access end (12), and the internal cavity of the connecting frame (21) is inserted with the fixing frame (22).

2. The ultra-low temperature coefficient resistor for automotive ECU according to claim 1, characterized in that: The surface of the connecting frame (21) is provided with a limiting groove (210), and the surface of the fixing frame (22) is fixedly connected with a limiting column (220). The surface of the limiting column (220) is inserted into the inner wall of the limiting groove (210).

3. The ultra-low temperature coefficient resistor for automotive ECU according to claim 2, characterized in that: The inner wall of the limiting groove (210) is fixedly connected with two protrusions (2101), and when the limiting column (220) slides on the inner wall of the limiting groove (210) and contacts the protrusions (2101), the limiting column (220) passes over the surface of the protrusions (2101) and is located in the internal cavity of the limiting groove (210).

4. The ultra-low temperature coefficient resistor for automotive ECU according to claim 3, characterized in that: The limiting groove (210) and the protrusions (2101) are made of engineering plastic material and have a certain elasticity.

5. The ultra-low temperature coefficient resistor for automotive ECU according to claim 3, characterized in that: The surface of the limiting column (220) is fixedly connected with a baffle (221), and the bottom of the baffle (221) contacts the surface of the connecting frame (21).

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