CN218577673U - CAN circuit structure based on vehicle diagnosis - Google Patents
CAN circuit structure based on vehicle diagnosis Download PDFInfo
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- CN218577673U CN218577673U CN202222816268.5U CN202222816268U CN218577673U CN 218577673 U CN218577673 U CN 218577673U CN 202222816268 U CN202222816268 U CN 202222816268U CN 218577673 U CN218577673 U CN 218577673U
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Abstract
The utility model discloses a CAN circuit structure based on vehicle diagnosis, including CAN line module, diagnosis subassembly, wiring subassembly. The utility model has the advantages that: the diagnosis universal meter is provided with a normally-connected fixed value resistor and a diagnosis fixed value resistor, and the diagnosis fixed value resistor and the normally-connected fixed value resistor are connected in series by rotating the two-throw switch to change the resistance value of the access circuit, so that after the diagnosis universal meter is accessed into the circuit, whether the circuit is accessed can be further measured according to whether the change of the resistor can be measured; the CAN-H line and the CAN-L line CAN be respectively diagnosed only by rotating the rotary knob without replacing clamping parts for many times.
Description
Technical Field
The utility model relates to a CAN circuit structure specifically is a CAN circuit structure based on vehicle diagnosis, belongs to CAN circuit diagnosis technical field.
Background
Automotive manufacturers have developed a variety of different electronic control systems. Since the types of data used for communication between these electronic control systems and the requirements for reliability and the like are different, the number of wire harnesses is increased, which brings about a certain difficulty in the manufacture and design of automobiles, and in order to meet the need for "reducing the number of wire harnesses" and "performing high-speed communication of a large amount of data through a plurality of LANs", the german electric company bosch in 1986 developed a CAN communication protocol for automobiles. CAN is one of the most widely applied field buses in the world, and provides powerful technical support for realizing real-time and reliable data communication among all nodes of a distributed control system.
To when the vehicle breaks down, often through diagnosing the CAN circuit, and then be convenient for in time and accurate find trouble position and trouble reason, though current patent number is: CN109050444a discloses a CAN circuit structure and a vehicle diagnostic device thereof, which are intended to solve the problem that there are still a plurality of different versions of the signal specification of the logic level of the existing car CAN network protocol specification, such as the common CAN network protocol specification and the 24V trailer CAN network protocol specification, and the software diagnosis of the CAN circuit is aimed at, and the diagnosis process also needs a professional person to operate and use, and the existing patent number is: CN205091568U discloses a circuit CAN of an automobile remote controller, which also solves the problems of complicated connection structure between various control circuits inside an automobile and a remote controller, more cables, and increased manufacturing cost in the prior art, but aims at a software part, how to perform quick connection on a specific connection hardware part, and how to avoid the technical problem of changing connection parts for multiple times, and is not disclosed.
SUMMERY OF THE UTILITY MODEL
An object of the present invention is to provide a CAN circuit structure based on vehicle diagnosis for solving at least one of the above-mentioned technical problems.
The utility model discloses a following technical scheme realizes above-mentioned purpose: a CAN circuit structure based on vehicle diagnosis comprises
The CAN line component forms a main structure of the CAN circuit and comprises a twisted CAN-H line and a CAN-L line, wherein the CAN-H line and the CAN-L line are connected in parallel with a plurality of node modules, two ends of the CAN-H line and two ends of the CAN-L line are respectively connected with a load resistor, and the load resistor comprises a constant value connecting resistor and a diagnosis constant value resistor;
the diagnosis assembly is used for performing fault diagnosis of open circuit or short circuit on a CAN line and comprises a diagnosis multimeter connected with a CAN-H line and a CAN-L line, an adjusting seat is connected in series on a line connected with the diagnosis multimeter and the CAN line assembly, the adjusting seat comprises a bottom shell provided with a cover plate and a rotating column rotatably connected in the bottom shell, the upper end of the rotating column is fixedly connected with a rotating knob penetrating through a through hole formed in the center of the cover plate, binding posts are respectively arranged on two sides of the rotating column in the bottom shell, and a plurality of metal sheets used for being in butt joint with the binding posts are arranged on the column body of the rotating column;
the wiring subassembly, it be used for with diagnosis universal meter is connected with CAN line assembly, and it include with the binding clip that the diagnosis universal meter connecting wire was connected, the binding clip comprises two splint, and one of them the last conducting strip that carries out the connection with the positive negative pole connecting wire end of diagnosis universal meter that is provided with of binding clip.
As a further aspect of the present invention: the diagnosis constant value resistor is connected with a normally open line in parallel, and the diagnosis constant value resistor and the normally open line are connected to a connecting line of the normally connected constant value resistor through a two-throw switch.
As the utility model discloses further scheme again: the tail ends of the metal sheets are respectively embedded in the rotating columns, and the two metal sheets which are centrosymmetric are connected through a line.
As a further aspect of the present invention: the two binding posts arranged on one side of the bottom shell are respectively connected with a circuit led out by the binding clips, and the two binding posts arranged on the other side of the bottom shell are respectively connected with a circuit led out by the diagnostic multimeter.
As a further aspect of the present invention: diagnosis marks are carved on the cover plate surface connected with the opening at the upper end of the bottom shell, and one end of the rotary knob, which is close to the diagnosis marks, is connected with a closed-angle pointer.
As a further aspect of the present invention: two wire grooves are formed in the clamping plate, and the conducting strips are fixedly clamped in the wire grooves respectively.
The utility model has the advantages that:
1. the diagnosis universal meter is provided with a normally-connected fixed value resistor and a diagnosis fixed value resistor, and the diagnosis fixed value resistor and the normally-connected fixed value resistor are connected in series by rotating the two-throw switch to change the resistance value of the access circuit, so that after the diagnosis universal meter is accessed into the circuit, whether the circuit is accessed can be further measured according to whether the change of the resistor can be measured;
2. the CAN-H line and the CAN-L line CAN be respectively diagnosed only by rotating the rotary knob without replacing clamping parts for many times.
Drawings
FIG. 1 is a schematic diagram of the overall circuit structure of the present invention;
fig. 2 is a schematic diagram of the load resistor circuit structure of the present invention;
fig. 3 is a schematic view of the connection structure of the diagnostic module and the wiring module of the present invention;
FIG. 4 is a schematic view of the internal structure of the adjusting seat of the present invention;
fig. 5 is a schematic view of the splint structure of the present invention.
In the figure: 1. a CAN-H line, 2, a CAN-L line, 3, a load resistor, 31, a normally-connected constant value resistor, 32, a diagnosis constant value resistor, 33, a normally-open line, 34, a two-throw switch, 4, a node module, 5 and a diagnosis universal meter, 6, an adjusting seat 61, a rotating knob 62, a bottom shell 63, a rotating column 64, a wiring terminal 65, a metal sheet 7, a wiring clip 71, a clamping plate 72, a wire groove 73 and a conducting plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example one
As shown in FIGS. 1 to 5, a CAN circuit structure based on vehicle diagnosis includes
The CAN line component forms a main structure of the CAN circuit and comprises a twisted CAN-H line 1 and a CAN-L line 2, wherein the CAN-H line 1 and the CAN-L line 2 are connected in parallel with a plurality of node modules 4, two ends of the CAN-H line 1 and the CAN-L line 2 are respectively connected with a load resistor 3, and the load resistor 3 comprises a connecting constant value resistor 31 and a diagnosis constant value resistor 32;
the diagnostic assembly is used for diagnosing open circuit or short circuit faults of a CAN line and comprises a diagnostic multimeter 5 connected with a CAN-H line 1 and a CAN-L line 2, an adjusting seat 6 is connected in series on a line connecting the diagnostic multimeter 5 and the CAN line assembly, the adjusting seat 6 comprises a bottom shell 62 provided with a cover plate and a rotating column 63 rotatably connected in the bottom shell 62, the upper end of the rotating column 63 is fixedly connected with a rotating knob 61 penetrating through a through hole formed in the center of the cover plate, binding posts 64 are respectively arranged on two sides of the rotating column 63 in the bottom shell 62, and a plurality of metal sheets 65 used for being in butt joint with the binding posts 64 are arranged on a column body of the rotating column 63;
wiring assembly, it be used for with diagnosis universal meter 5 is connected with CAN line assembly, and it include with the binding clip 7 that diagnosis universal meter 5 connecting wire goes on connecting, binding clip 7 comprises two splint 71, and one of them be provided with on the binding clip 7 with the positive negative pole connecting wire end of diagnosis universal meter 5 carry out the conducting strip 73 of being connected.
Example two
As shown in fig. 1 to 5, the present embodiment includes, in addition to all the technical features of the first embodiment:
the diagnosis fixed value resistor 32 is connected with a normally open line 33 in parallel, the diagnosis fixed value resistor 32 and the normally open line 33 are connected to a connecting line of the normally connected fixed value resistor 31 through a two-throw switch 34, and when the circuit structure is subjected to open circuit diagnosis, the diagnosis fixed value resistor 32 and the normally connected fixed value resistor 31 are connected in series through rotating the two-throw switch 34, so that the resistance value of the access circuit is changed, therefore, after the diagnosis multimeter 5 is accessed into the circuit, whether the circuit is accessed can be further measured according to whether the change of the resistor can be measured.
EXAMPLE III
As shown in fig. 1 to 5, the present embodiment includes, in addition to all the technical features of the first embodiment:
the tail ends of the metal sheets 65 are respectively embedded in the rotating column 63, and the two metal sheets 65 which are centrosymmetric are connected through a line, when the rotating knob 61 is rotated to drive the rotating column 63 to rotate along with the rotating column, the two connected metal sheets 65 can be butted to the corresponding binding posts 64 on the two sides, so that diagnosis of different lines is realized.
Two binding posts 64 arranged on one side edge of the bottom shell 62 are respectively connected with a circuit led out by the binding clips 7, two binding posts 64 arranged on the other side edge of the bottom shell 62 are respectively connected with a circuit led out by the diagnostic multimeter 5, a circuit connected through the two-throw switch 34 is arranged between positive and negative circuits led out by the diagnostic multimeter 5, when the circuit structure is subjected to voltage diagnosis, a negative circuit port of the diagnostic multimeter 5 is connected, the negative end is grounded, the two binding posts 64 are both connected with a positive end, and meanwhile, when the rotating column 63 is rotated to enable the metal sheet 65 to be in butt joint with the binding post 64 connected with the positive end of one of the diagnostic multimeter 5, the other metal sheet 65 connected with the binding post 64 connected with the positive end of the other diagnostic multimeter 5 CAN be in butt joint, namely, the CAN-H line 1 and the CAN-L line 2 CAN be diagnosed respectively only by rotating the rotating knob 61 without replacing clamping parts for multiple times.
Example four
As shown in fig. 1 to 5, the present embodiment includes all the technical features of the first embodiment, in addition to the following features:
diagnosis marks are carved on the cover plate surface connected with the opening at the upper end of the bottom shell 62, and one end, close to the diagnosis marks, of the rotating knob 61 is connected with a pointed pointer, so that the rotating position of the rotating knob 61 can be determined, and the operation and the use are convenient.
Two wire grooves 72 are formed in the clamping plate 71, and the conducting strips 73 are fixedly clamped in the wire grooves 72 respectively, so that the connecting part of the CAN-H wire 1 and the CAN-L wire 2 CAN be clamped in the wire grooves 72, and the clamping firmness is ensured.
The working principle is as follows: the diagnosis universal meter 5 is connected with the circuit structure by clamping the connection part of the CAN-H line 1 and the CAN-L line 2 in the line groove 72, when the rotating column 63 is rotated to butt the metal sheet 65 on the wiring terminal 64 connected with the CAN-H line 1 or the CAN-L line 2 according to the diagnosis requirement, the other connected metal sheet 65 CAN be butt-jointed with the wiring terminal 64 connected with the positive terminal of one diagnosis universal meter 5, namely the CAN-H line 1 and the CAN-L line 2 CAN be respectively diagnosed by rotating the rotating knob 61 without replacing the clamping part for many times.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. A CAN circuit structure based on vehicle diagnosis is characterized in that: comprises that
The CAN line component forms a main structure of the CAN circuit and comprises a twisted CAN-H line (1) and a CAN-L line (2), a plurality of node modules (4) are connected in parallel on the CAN-H line (1) and the CAN-L line (2), two ends of the CAN-H line (1) and the CAN-L line (2) are respectively connected with a load resistor (3), and the load resistor (3) comprises a constant value connecting resistor (31) and a diagnosis constant value resistor (32);
the diagnosis assembly is used for performing fault diagnosis of open circuit or short circuit on a CAN line and comprises a diagnosis multimeter (5) connected with a CAN-H line (1) and a CAN-L line (2), an adjusting seat (6) is connected in series on the line connected with the diagnosis multimeter (5) and the CAN line assembly, the adjusting seat (6) comprises a bottom shell (62) provided with a cover plate and a rotary column (63) rotatably connected in the bottom shell (62), the upper end of the rotary column (63) is fixedly connected with a rotary knob (61) penetrating through a through hole formed in the center of the cover plate, binding posts (64) are respectively arranged on two sides of the rotary column (63) in the bottom shell (62), and a plurality of metal sheets (65) used for being in butt joint with the binding posts (64) are arranged on a column body of the rotary column (63);
wiring subassembly, it be used for with diagnosis universal meter (5) are connected with CAN line subassembly, and it include with binding clip (7) that diagnosis universal meter (5) connecting wire goes on connecting, binding clip (7) comprise two splint (71), and wherein one be provided with on binding clip (7) and carry out conducting strip (73) of being connected with diagnosis universal meter (5) positive and negative pole connecting wire end.
2. The CAN circuit structure based on vehicle diagnosis according to claim 1, wherein: the diagnosis constant value resistor (32) is connected with a normally-on line (33) in parallel, and the diagnosis constant value resistor (32) and the normally-on line (33) are connected to a connecting line of the normally-on constant value resistor (31) through a two-throw switch (34).
3. The CAN circuit structure based on vehicle diagnosis according to claim 1, wherein: the tail ends of the metal sheets (65) are respectively embedded in the rotating columns (63), and the two metal sheets (65) which are centrosymmetric are connected through a line.
4. The CAN circuit structure based on vehicle diagnosis according to claim 1, wherein: two binding posts (64) arranged on one side edge of the bottom shell (62) are respectively connected with a circuit led out by the binding clips (7), two binding posts (64) arranged on the other side edge of the bottom shell (62) are respectively connected with a circuit led out by the diagnostic multimeter (5), and a circuit connected through a two-throw switch (34) is arranged between a positive circuit and a negative circuit led out by the diagnostic multimeter (5).
5. The CAN circuit structure based on vehicle diagnosis according to claim 1, wherein: diagnosis marks are carved on the surface of the cover plate connected with the opening at the upper end of the bottom shell (62), and one end, close to the diagnosis marks, of the rotating knob (61) is connected with a sharp-horn-shaped pointer.
6. The CAN circuit structure based on vehicle diagnosis according to claim 1, wherein: two wire grooves (72) are formed in the clamping plate (71), and the conducting strips (73) are fixedly clamped in the wire grooves (72) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222816268.5U CN218577673U (en) | 2022-10-25 | 2022-10-25 | CAN circuit structure based on vehicle diagnosis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222816268.5U CN218577673U (en) | 2022-10-25 | 2022-10-25 | CAN circuit structure based on vehicle diagnosis |
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| Publication Number | Publication Date |
|---|---|
| CN218577673U true CN218577673U (en) | 2023-03-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222816268.5U Active CN218577673U (en) | 2022-10-25 | 2022-10-25 | CAN circuit structure based on vehicle diagnosis |
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| CN (1) | CN218577673U (en) |
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- 2022-10-25 CN CN202222816268.5U patent/CN218577673U/en active Active
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