CN108107288B - Vehicle-mounted engineering machinery fault diagnosis instrument - Google Patents
Vehicle-mounted engineering machinery fault diagnosis instrument Download PDFInfo
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- CN108107288B CN108107288B CN201711146597.0A CN201711146597A CN108107288B CN 108107288 B CN108107288 B CN 108107288B CN 201711146597 A CN201711146597 A CN 201711146597A CN 108107288 B CN108107288 B CN 108107288B
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- 238000003745 diagnosis Methods 0.000 title claims abstract description 15
- 238000009423 ventilation Methods 0.000 claims description 18
- 239000003990 capacitor Substances 0.000 claims description 6
- 238000002955 isolation Methods 0.000 claims description 6
- 241000463219 Epitheca Species 0.000 claims description 4
- 230000017525 heat dissipation Effects 0.000 abstract description 6
- 238000004458 analytical method Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 230000002441 reversible effect Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 230000001629 suppression Effects 0.000 description 3
- 230000001052 transient effect Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Connection Or Junction Boxes (AREA)
- Casings For Electric Apparatus (AREA)
Abstract
The invention relates to a vehicle-mounted engineering machinery fault diagnosis instrument which comprises a shell and a circuit board assembly, wherein the shell comprises an upper shell and a lower shell; a mounting seat for mounting the circuit board assembly is arranged in the lower shell, and a connecting hole is formed in the mounting seat; the inner bottom of the lower shell is also provided with a first heat conduction column with the same height as the mounting seat; the upper shell is internally provided with a second heat conduction column, and the first heat conduction column and the second heat conduction column are respectively in contact heat conduction with the circuit board assembly; the connection part of the upper shell and the lower shell is provided with a matched connection port, the connection port is provided with a data wire connector, and the data wire connector is electrically connected with the circuit board assembly; the lower part of the lower shell is provided with a shockproof bracket. According to the invention, data in the engineering machinery CAN bus is imported into the circuit board assembly for analysis and processing, so that analysis and processing of faults are realized; meanwhile, the invention has the advantages of simple structure, good heat dissipation effect and light weight, and is worth popularizing.
Description
Technical Field
The invention relates to the technical field of engineering machinery, in particular to a vehicle-mounted engineering machinery fault diagnosis instrument.
Background
With the development of economy in China, the development of the mechanical manufacturing industry and the highway transportation industry is rapid, the requirements on the control technology and equipment of mechanical equipment are increasing, the faults of the mechanical equipment are particularly important, and the corresponding fault detection technology is not developed rapidly.
At present, the fault error reporting technology of engineering machinery in the whole industry is weak, and because the engineering machinery has complex working environment and various devices, the problems are required to be manually arranged one by one under the condition of faults, so that the reasons can not be timely found out, and the working efficiency is low. Not only influencing the working progress, but also not carrying out timely analysis and early warning on the possible problems, leaving potential safety hazards for subsequent work, and the negative effects caused by the potential safety hazards are very large.
Along with the stronger and stronger requirements of the whole industry on fault reporting of engineering machinery, the urgency of solving the technical problem is also stronger. Because the working environment of engineering machinery is complex, the equipment is numerous, and the reasons can not be found out in time under the condition of faults; the fault equipment can be rapidly positioned through real-time data acquisition, and the service condition of the equipment can be counted.
Disclosure of Invention
In order to solve the technical problems, the invention discloses a vehicle-mounted engineering machinery fault diagnosis instrument, which aims to analyze and process the operation condition of engineering machinery by recording and detecting various data on a CAN bus of the engineering machinery, early warn the hidden danger of work in the working operation, and indicate specific faults after the faults occur, thereby avoiding manual investigation, saving a great amount of time, improving the efficiency and ensuring the smooth operation of the engineering machinery.
The technical scheme adopted by the invention is as follows:
the vehicle-mounted engineering machinery fault diagnosis instrument comprises a shell and a circuit board assembly. The circuit board assembly is connected to a CAN bus of an external engineering machine, and data of the bus are collected and analyzed, so that fault diagnosis is achieved. The shell wraps and protects the circuit board assembly, and good heat dissipation and shock resistance are achieved.
Specifically, the shell comprises an upper shell and a lower shell, the upper shell and the lower shell are provided with corresponding threaded holes, and fastening bolts are arranged in the threaded holes. Generally, the upper shell and the lower shell are square shells, and threaded holes are formed in four corners of the shells; on the basis, besides the upper shell and the lower shell which are connected by using threaded holes to match with bolts, the upper shell and the lower shell can be connected by adopting a bolt, a buckle and the like.
Further, a mounting seat for mounting the circuit board assembly is arranged in the lower shell, and a connecting hole is formed in the mounting seat. The mount pad sets up along the inside edge of inferior valve, and the quantity of mount pad is two at least, and when inferior valve was square, the mount pad set up in the four corners department of inferior valve.
Further, the inner bottom of the lower shell is also provided with a first heat conduction column with the same height as the mounting seat; the upper shell is internally provided with a second heat conduction column, and the first heat conduction column and the second heat conduction column are respectively in contact heat conduction with the circuit board assembly.
The first heat conduction column is embedded at the inner bottom of the lower shell, contacts the bottom of the circuit board assembly and plays a role in supporting the circuit board assembly; the second heat conduction column is clamped and embedded at the inner top of the upper shell and contacts with the upper part of the circuit board assembly, and meanwhile the circuit board assembly is compressed.
Further, the circuit board assembly comprises a main board and a core board, the main board is fixed on the mounting seat, an input anti-reverse connection circuit, a common mode filter circuit and an overvoltage protection circuit which are sequentially communicated are arranged on the main board, and the input anti-reverse connection circuit is electrically connected with the data line connector; the core board is installed inside the upper case and electrically connected with the main board. A unidirectional diode, a transient suppression diode and a self-recovery fuse are arranged in the input reverse connection prevention circuit; the common-mode filter circuit is provided with a common-mode coil inductor; the overvoltage protection circuit is provided with a fixed value resistor, a voltage stabilizing diode and an MOS tube.
Still further, in order to protect the core board circuit, prevent the interference, not receive the surge of thunderbolt or voltage spike to destroy, the mainboard on be provided with the isolation power module, the electricity of isolation power module and core board is connected.
Still further, in order to prevent the conductance from causing the data damage, be provided with the electric capacity on the mainboard, the electric capacity links to each other with the power supply circuit of mainboard.
Still further, in order to ensure proper operation of the diagnostic apparatus, a watchdog is integrated on the motherboard.
The connection part of the upper shell and the lower shell is provided with a matched connection port, the connection port is provided with a data wire connector, and the data wire connector is electrically connected with the circuit board assembly; the lower part of the lower shell is provided with a shockproof bracket.
Still further, the data line connector be waterproof joint.
Further, in order to enhance the heat dissipation inside the diagnostic apparatus, the side wall surface of the upper shell is provided with ventilation holes, and ventilation valves are arranged in the ventilation holes. The connection relation between the ventilation valve and the ventilation holes can be regulated in a normal state, so that the air tightness is changed, the temperature inside the diagnostic instrument is kept in a proper range, and the working efficiency and the working speed of the diagnostic instrument are improved.
Still further, the ventilation valve is a threaded, pressed-in, snap-in or twist-buckle ventilation valve; ventilation can also be performed by arranging a breathing sheet at the air holes.
Further, the mainboard on be equipped with a plurality of pilot lamps, the epitheca is equipped with the lamp hole the same with pilot lamp quantity, the pilot lamp is located the lamp hole. Different circuits are arranged on the main board, and the on-off state of each circuit represents different working states; in order to more directly show the working state of the diagnostic apparatus, the main circuit of the main board, the power supply circuit between the main board and the core board, the input reverse connection preventing circuit and the circuit where the isolation power supply module is positioned are respectively connected with an indicator lamp, and the color of the indicator lamp of each circuit is different.
Still further, the lateral wall face of epitheca and inferior valve on be equipped with corresponding draw-in groove or fixture block, epitheca and inferior valve are connected the location through the cooperation of draw-in groove and fixture block. The meaning of setting like this is that the location to upper shell and inferior valve is more accurate, and the connection is more firm simultaneously.
Still further, consider that this diagnostic apparatus is vehicle-mounted device, in order to reduce vibrations in the use, the support that takes precautions against earthquakes include two at least rectangular connecting pieces, the both ends of connecting piece are provided with the bolt, still be equipped with two at least connecting holes on the connecting piece, be equipped with the bolt mechanism of being connected with the inferior valve in the connecting hole, be equipped with the flexible circle between connecting hole and the bolt mechanism.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention realizes the collection and analysis of CAN bus data by connecting the circuit board assembly with the CAN bus of the engineering machinery, thereby achieving the detection of faults, saving time and energy of people, having high efficiency and being very convenient.
2. According to the invention, the vibration-proof support is arranged, so that the working state of the diagnostic instrument is more stable, the interference of the external environment is reduced, and the accuracy in the detection process is improved.
3. According to the invention, by arranging the first heat conduction column and the second heat conduction column, heat conduction to the circuit board assembly is realized, the positive effect on reducing the temperature inside the diagnostic instrument is realized, the temperature inside the diagnostic instrument is reasonably and effectively controlled, the working efficiency and accuracy of the diagnostic instrument are improved, and the probability of dead halt is reduced.
4. According to the invention, through arranging the ventilation holes and the ventilation valves, heat exchange of the internal heat of the diagnostic instrument can be realized in an air convection mode, the internal temperature of the diagnostic instrument is controlled more simply and directly, and the working efficiency and the working accuracy of the diagnostic instrument are improved conveniently.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is an exploded view of the present invention.
Fig. 3 is a schematic structural view of the upper case.
Fig. 4 is a schematic structural view of the lower case.
Fig. 5 is a schematic structural view of the connector.
Fig. 6 is an exploded view of the shock mount.
Fig. 7 is a partial circuit schematic.
Fig. 8 is a schematic diagram of an isolated power module circuit.
Fig. 9 is a schematic circuit diagram of a capacitor.
In the above drawings, the names corresponding to the reference numerals are: 1-upper shell, 101-first heat conduction column, 102-bleeder vent, 103-pilot lamp, 2-lower shell, 201-second heat conduction column, 202-mount pad, 203-connecting hole, 3-ventilation valve, 4-shockproof support, 401-flexible circle, 402-connecting piece, 403-bolt cover, 404-bolt, 5-data line connector, 501-sand grip, 502-locating port, 503-connector link, 6-lamp hole, 7-fastening bolt, 701-screw hole.
Detailed Description
The invention is further described below with reference to the accompanying drawings. Embodiments of the present invention include, but are not limited to, the following examples.
Examples
As shown in fig. 1-9, the present embodiment discloses a vehicle-mounted engineering machinery fault diagnosis apparatus, which includes a housing and a circuit board assembly. The circuit board assembly is connected to a CAN bus of an external engineering machine, and data of the bus are collected and analyzed, so that fault diagnosis is achieved.
The casing is cuboid, wraps up the protection with the circuit board subassembly to realize good heat dissipation, shock resistance.
Specifically, as shown in fig. 2, the housing includes an upper case 1 and a lower case 2, the upper case 1 and the lower case 2 are provided with corresponding screw holes 701, and fastening bolts 7 are provided in the screw holes 701. The four corners of the upper shell 1 and the lower shell 2 are respectively provided with an epitaxial wing-shaped structure, the wing-shaped structures of the upper shell 1 and the lower shell 2 are correspondingly attached, and the wing-shaped structures are provided with threaded holes 701.
Meanwhile, as shown in fig. 1, the upper surface of the upper case 1, the side wall surface of the upper case 1, the lower surface of the lower case 2, the side wall surface of the lower case 2 and the surface of the wing-like structure are provided with hollowed-out groove-like structures, and the significance of the arrangement is that: the wall thickness of the upper shell 1 and the lower shell 2 can be reduced through the hollow groove-shaped structure, so that the heat dissipation of the shell is facilitated; meanwhile, the hollowed-out structure is more material-saving, and the weight of the shell is smaller.
As shown in fig. 3 and 4, a mounting seat 202 for mounting a circuit board assembly is provided in the lower case 2, and a connection hole 203 is provided in the mounting seat 202. The mounting seats 202 are arranged along the edge of the inner part of the lower shell 2, the number of the mounting seats 202 is four, one mounting seat 202 is respectively arranged at the four corners of the lower shell 2, and the height of the mounting seat 202 is exactly half of the inner height of the lower shell 2.
The connecting hole 203 on the mounting seat 202 is internally provided with threads, and the circuit board assembly is provided with through holes corresponding to the positions of the connecting hole 203 on the mounting seat 202, and is fixed on the mounting seat 202 through bolts.
The inner bottom of the lower shell 2 is also provided with a first heat conduction column 101 with the same height as the mounting seat 202; the upper shell 1 is internally provided with a second heat conduction column 201, and the first heat conduction column 101 and the second heat conduction column 201 are respectively in contact heat conduction with the circuit board assembly.
The first heat conductive post 101 is embedded in the inner bottom of the lower case 2, contacts the bottom of the circuit board assembly, and plays a supporting role on the circuit board assembly. The number of the first heat conductive pillars 101 is one, and the first heat conductive pillars 101 are rectangular parallelepiped, and the first heat conductive pillars 101 are made of a metal material, preferably a copper material in this embodiment. The section of the first heat conduction column 101, which is in contact with the circuit board assembly, is provided with heat conduction silicone grease, so that the contact between the first heat conduction column and the circuit board assembly is good, and the heat conduction is uniform.
The second heat conductive post 201 is snap-fitted to the inner top of the upper case 1, contacts the upper portion of the circuit board assembly, and simultaneously plays a role in compressing the circuit board assembly. The number of the second heat conductive pillars 201 is three, and the second heat conductive pillars 201 are rectangular parallelepiped, and the second heat conductive pillars 201 are made of a metal material, preferably a copper material in this embodiment. The section of the second heat conduction column 201, which is in contact with the circuit board assembly, is provided with heat conduction silicone grease, so that the contact between the second heat conduction column and the circuit board assembly is good, and the heat conduction is uniform.
The circuit board assembly comprises a main board and a core board, wherein the main board and the core board are both PCB circuit boards. The main board is fixed on the mounting seat 202, and is provided with an input anti-reverse connection circuit, a common mode filter circuit and an overvoltage protection circuit which are sequentially communicated, and the input anti-reverse connection circuit is electrically connected with the data line connector 5; the core board is installed inside the upper case 1 and electrically connected with the main board.
The lower surface of the main board is in contact connection with the first heat conductive columns 101, and the upper surface of the core board is in contact connection with the second heat conductive columns 201.
As shown in fig. 7, a unidirectional diode, a transient suppression diode and a self-recovery fuse are arranged in the input reverse connection prevention circuit, the unidirectional diode is a product of an ES2B model, the transient suppression diode is a product of an SMBJ18CA or SMBJ51CA model, and the self-recovery fuse is a product of an MSM 110/33 model; the common-mode filter circuit is internally provided with a common-mode coil inductor, and the common-mode coil inductor is a product of ACM1211-102-2PL model; the overvoltage protection circuit is provided with a fixed value resistor, a voltage stabilizing diode and MOS (metal oxide semiconductor) tubes, wherein the number of the fixed value resistor is three, and the fixed value resistor is a product of 20K/1%SR0603 series, the three resistors are prevented from 29 ohm, 30 ohm and 31 ohm respectively, the number of the voltage stabilizing diode is two, and the fixed value resistor is a product of MMSZ5242B and MMSZ5258B type respectively, and the number of the MOS tubes is two, and the fixed value resistor is a product of IRFR6215PBF and ME2301 type respectively.
As shown in FIG. 8, in order to protect the core board circuit, the main board is provided with an isolation power module which is electrically connected with the main board or the core board, so as to prevent interference and prevent the damage of lightning surge or voltage spike. The isolated power module in this embodiment employs URB2405YMD-10WR3 and is configured Jin Shengyang to isolate the power module circuitry.
As shown in fig. 9, in order to prevent the data from being damaged due to the power failure, a capacitor is arranged on the main board and is connected with a power supply circuit of the main board. The capacitor is used for storing electricity, the capacitor is charged in the normal working process of the diagnostic instrument, and after external power supply is disconnected, the capacitor supplies power in a short time, so that the data in the diagnostic instrument are not lost.
In order to ensure the normal operation of the diagnostic apparatus, a watchdog is integrated on the motherboard.
As shown in fig. 5, a matched connection port is arranged at the connection position of the upper shell 1 and the lower shell 2, a data wire connection head 5 is arranged at the connection port, and the data wire connection head 5 is electrically connected with the circuit board assembly;
in order to ensure the safe and reliable connection between the diagnostic apparatus and the outside, the data line connector 5 adopts a waterproof connector. The waterproof connector comprises a plurality of connecting terminals and positioning ports 502, the positioning ports 502 are elliptical coamings, at least two positioning convex strips 501 are arranged on the coamings, a connecting buckle 503 is further arranged, two fixing holes for fixing external data lines are formed in the connecting buckle 503, and two sliding grooves for positioning the external data lines are further formed in the connecting buckle 503.
In order to enhance the heat dissipation inside the diagnostic apparatus, the side wall surface of the upper shell 1 is provided with an air vent 102, and an air vent valve 3 is arranged in the air vent 102. The connection relation between the ventilation valve 3 and the ventilation holes 102 can be regulated in a normal state, so that the air tightness is changed, the temperature inside the diagnostic instrument is kept in a proper range, and the working efficiency and the working speed of the diagnostic instrument are improved.
In this embodiment, the breather valve 3 is a threaded breather valve 3.
Four LED pilot lamps 103 of red Huang Lanbai are arranged on the mainboard, the upper shell 1 is provided with lamp holes 6 the same as the pilot lamps 103 in number, and the pilot lamps 103 are positioned in the lamp holes 6. Different circuits are arranged on the main board, and the on-off state of each circuit represents different working states; in order to more directly show the working state of the diagnostic apparatus, the main circuit of the main board, the power supply circuit between the main board and the core board, the input reverse connection preventing circuit and the circuit where the isolation power supply module is located are respectively connected with an indicator lamp 103, and the indicator lamps 103 of each circuit are different in color.
The side wall surface of the upper shell 1 is provided with a clamping block, the side wall surface of the lower shell 2 is provided with a clamping groove corresponding to the clamping block, and the upper shell 1 and the lower shell 2 are connected and positioned through the matching of the clamping groove and the clamping block.
Considering that the diagnostic apparatus is a vehicle-mounted device, in order to reduce vibration during use, the lower part of the lower housing 2 is provided with a vibration-proof bracket 4.
As shown in fig. 6, the shock-proof bracket 4 includes two elongated connectors 402, two ends of each connector 402 are respectively provided with a bolt, and the shock-proof bracket 4 is connected to the outside by the bolts and is fixed; the connecting piece 402 is also provided with two connecting holes 203, a bolt 404 mechanism connected with the lower shell 2 is arranged in the connecting holes 203, and a flexible ring 401 is arranged between the connecting holes 203 and the bolt 404 mechanism.
The lower shell 2 is provided with a through hole connected with a bolt 404 mechanism, the bolt 404 mechanism comprises a bolt 404 and a bolt sleeve 403, the bolt 404 is connected with the through hole, the bolt sleeve 403 is sleeved on the bolt 404, a flexible ring 401 is sleeved outside the bolt sleeve 403 of the colleague, and the flexible ring 401 is clamped by the connecting hole 203.
The flexible loop 401 is an i-shaped loop made of rubber material.
The present invention can be well implemented according to the above-described embodiments. It should be noted that, based on the above design principle, even if some insubstantial changes or color modification are made on the basis of the structure disclosed in the present invention, the adopted technical solution is still substantially the same as the present invention, so that the technical solution is also within the protection scope of the present invention.
Claims (6)
1. The vehicle-mounted engineering machinery fault diagnosis instrument comprises a shell and a circuit board assembly, and is characterized in that the shell comprises an upper shell (1) and a lower shell (2), the upper shell (1) and the lower shell (2) are provided with corresponding threaded holes (701), and fastening bolts (7) are arranged in the threaded holes (701); a mounting seat (202) for mounting the circuit board assembly is arranged in the lower shell (2), and a connecting hole (203) is formed in the mounting seat (202); the inner bottom of the lower shell (2) is also provided with a first heat conduction column (101) with the same height as the mounting seat (202); a second heat conduction column (201) is arranged in the upper shell (1), and the first heat conduction column (101) and the second heat conduction column (201) are respectively in contact heat conduction with the circuit board assembly; the connection part of the upper shell (1) and the lower shell (2) is provided with a matched connection port, the connection port is provided with a data wire connector (5), and the data wire connector (5) is electrically connected with the circuit board assembly; the lower part of the lower shell (2) is provided with a shockproof bracket (4); the circuit board assembly comprises a main board and a core board, wherein the main board is fixed on a mounting seat (202), an input anti-reverse connection circuit, a common mode filter circuit and an overvoltage protection circuit which are sequentially communicated are arranged on the main board, and the input anti-reverse connection circuit is electrically connected with a data line connector (5); the core board is arranged in the upper shell (1) and is electrically connected with the main board; the main board is provided with an isolation power supply module which is electrically connected with the core board; the main board is provided with a capacitor which is connected with a power supply circuit of the main board; the main board on be equipped with a plurality of pilot lamps (103), epitheca (1) are equipped with lamp hole (6) the same with pilot lamp (103) quantity, pilot lamp (103) are located lamp hole (6).
2. The vehicle-mounted engineering machinery fault diagnosis apparatus according to claim 1, wherein the side wall surface of the upper case (1) is provided with ventilation holes (102), and ventilation valves (3) are arranged in the ventilation holes (102).
3. The vehicle-mounted engineering machinery fault diagnosis apparatus according to claim 2, wherein the ventilation valve (3) is a threaded, press-in, snap-in or twist-buckle ventilation valve.
4. The vehicle-mounted engineering machinery fault diagnosis apparatus according to claim 1, wherein the data line connector (5) is a waterproof connector.
5. The vehicle-mounted engineering machinery fault diagnosis apparatus according to claim 1, wherein a clamping block is arranged on the side wall surface of the upper shell (1), a clamping groove is arranged on the side wall surface of the lower shell (2), and the upper shell (1) and the lower shell (2) are connected and positioned through the matching of the clamping groove and the clamping block.
6. The vehicle-mounted engineering machinery fault diagnosis apparatus according to claim 1, wherein the shock-proof support (4) comprises at least two strip-shaped connecting pieces (402), bolts are arranged at two ends of each connecting piece (402), at least two connecting holes (203) are further formed in each connecting piece (402), a bolt (404) mechanism connected with the lower shell (2) is arranged in each connecting hole (203), and a flexible ring (401) is arranged between each connecting hole (203) and each bolt (404) mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711146597.0A CN108107288B (en) | 2017-11-17 | 2017-11-17 | Vehicle-mounted engineering machinery fault diagnosis instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711146597.0A CN108107288B (en) | 2017-11-17 | 2017-11-17 | Vehicle-mounted engineering machinery fault diagnosis instrument |
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| Publication Number | Publication Date |
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| CN108107288A CN108107288A (en) | 2018-06-01 |
| CN108107288B true CN108107288B (en) | 2024-01-09 |
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| CN108107288A (en) | 2018-06-01 |
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