CN2502953Y - Repair experimental platform for vehicle automatic transmission - Google Patents

Abstract

A maintenance test bench for a vehicle automatic transmission, which particularly comprises a support bench of the test bench, a hydraulic station, an instrument penal for testing oil pressure, a working table and an electromagnetic valve detecting and driving device, wherein, the test bench comprises a multi-function installing frame of the transmission, an output shaft gripper, an output shaft expander and a testing device for a rotatory angle. The test bench has the advantages of simple structure and light weight, carrying out complete fault diagnosis and analysis of various aspects of the vehicle automatic transmission such as machinery, hydraulic pressure, electric control without assistance of a driving motor and a load equipment, being intuitionistic and easy to be studied. The detecting and driving device can also be used independently and the test bench can be widely applied to the industry of vehicle maintenance.

Description

A kind of automatic gearbox maintenance test bench set

One, technical field

Automobile service equipment under the automatic gearbox test cell of the present utility model.

Two, background technology

Automatic transmission with hydraulic torque converter is the device that automobile is used for changing transmission speed ratio, it utilizes full hydraulic control or electrically controlled and hydraulically technology, realize gear shift according to the load of vehicle ' and the variation of the speed of a motor vehicle, in motor repair trade,, check for the repairing of automatic transmission with hydraulic torque converter, normally on automobile, install and carry out, tend to so just that the repairman repairs repeatedly and checks, labour intensity is very big, and fault cause is difficult to diagnosis.

In car production manufacturing firm, a kind of comprehensive transmission test is arranged, its defeated end at change-speed box is provided with high-performance buncher, its mouth is provided with load device, be a kind of test under load platform, though it can carry out the quantitative detection of change-speed box, as measurements such as moment of torsion rotating speeds, but its device structure is huge, system complex, entire equipment cost height, and be helpless to repairman's visual in image detection, load-carrying test can make the as easy as rolling off a log damage of change-speed box in bad order, and can not repair again.Transmission Test Bed is not suitable for using in motor repair trade like this.

Three, summary of the invention

The utility model provides a kind of and is suitable for automobile repair, safeguards the automatic transmission test bench that industry is used, and is detected actuating device two parts composition by organization hydraulic pressure test cell and electromagnetic valve.

1, machinery and hydraulic pressure are formed test cell, and be characterized in by the automobile test supporting station, be the Hydraulic Station of change-speed box fuel feeding, the oil pressure testing gauge panel, compositions such as bench board, and contain an electromagnetic valve detection that is used for automatic transmission with hydraulic torque converter, device driven.Described test supporting station comprises bearing support, panel all around, top board, a carrying cylinder has been welded on bearing support top, its an end plug-in mounting the erection of transmission frame, the center of erecting frame is a hollow hole, its termination and carrying cylinder that inserts carrying cylinder is provided with fixed pin holes, and is connected by the pin that inserts on it; A nyliner is housed in its carrying cylinder, wherein installing a spanner torsion bar, in torsion bar erecting frame termination is the square toes of connector bushing, be connected with sleeve pipe on its square toes, and connect the defeated axle clamp of change-speed box and change device, and the other end torsion bar termination of support tube is adorned a survey and is turned round spanner, described Hydraulic Station is installed in the bottom in the supporting station, and its delivery pipe is connected to the pressure testing disk compression indicator and for change-speed box, the piezometric tube and the compression indicator of at least one test oil pressure is housed also on its pressure disc.Bench board is located at the supporting station next door, below erecting frame.

Above-mentioned test cell also comprise a transmission output shaft tension device and be connected the corner proving installation that uses on its clampers.

2, electromagnetic valve detection, actuating device, it comprises the main control system box, connecting cable, compositions such as rotating disk box on the grafting Automotive transmission ripple case electromagnetic valve and control circuit thereof.Described circuit contains three parts such as mainboard control circuit, display circuit and conversion junction circuit to be formed.Wherein: the mainboard control circuit has master control micro controller system, keyboard interface, keyboard input scan chip, the pio chip of four command valves, the pio chip of all the other valves, change-over switch AND circuit chip, crystal resonator, boxcar connection jaws, display panel interface, and solenoid-driven and the testing circuit formed by aerotron, diode, resistance, relay and switch contact.Display circuit has mainboard interface, 3 control display chips, and circuit of LED, and 3 drive the charactron amplifier chip; And also include the required frequency of generation electromagnetic valve, adjust the square-wave signal of dutycycle and send out device and corresponding coupling adjustment circuit.Panel on the described host box is soft master cock keyboard, and has dutycycle to adjust the knob of potential device.

Automatic gearbox maintenance test bench set provided by the utility model belongs to automobile repair specialized equipment mechanical, electrical, the liquid one.It does not need motor and the force-input device and the electrical control gear thereof of drive speed transmission, thereby makes device structure simple, in light weight, and the equipment manufacturing cost cost is low.Adopt the multi-functional clamping device in the test cell, can satisfy the detection of the change-speed box of different automobile kinds, utilize the dynamometry spanner, corner is surveyed device, and electromagnetic valve detects, actuating device, can realize the machinery to automatic transmission with hydraulic torque converter, the diagnosis of electrical accident.Its electromagnetic valve detects, actuating device can be used on machinery, hydraulic test bench, constitutes complete automatic gearbox maintenance test bench set, again can be independently in condition of the vehicle detection in service and the trouble diagnosing.

Four, description of drawings

Fig. 1 is an automatic gearbox maintenance test bench set overall structure scheme drawing;

Fig. 2 is an erection of transmission frame cutaway view;

Fig. 3 is an erection of transmission frame front view;

Fig. 4 is an input shaft clamper cutaway view;

Fig. 5 is an input shaft clamper front view;

Fig. 6 is an input shaft clamper grip block scheme drawing;

Fig. 7 is a transmission output shaft tension device constructional drawing;

Fig. 8 is a transmission output shaft tension device side diagrammatic sketch;

Fig. 9 is a corner proving installation master diagrammatic sketch;

Figure 10 is a corner proving installation calibrated disc scheme drawing;

Figure 11 is the Hydraulic Station hydraulic circuit;

Figure 12 is that electromagnetic valve detects, the actuating device scheme drawing;

Figure 13 is motherboard circuit and boxcar interconnecting wiring diagram;

Figure 14 is display board circuit figure.

Five, the specific embodiment

Describe specific embodiment of the utility model in detail below in conjunction with accompanying drawing.

Fig. 1, a kind of automatic gearbox maintenance test bench set by test supporting station 1, is the Hydraulic Station 2 of change-speed box 10 fuel feeding, oil pressure testing gauge panel 3, bench board 4, and compositions such as the detection of the electromagnetic valve of automatic transmission with hydraulic torque converter, actuating device 5.Described test cell comprise bearing support 101, panel 102 all around, top board 103.The carrying cylinder 104 that has been welded on bearing support top, its an end plug-in mounting erection of transmission frame 105, and the center of erecting frame is a hollow hole, and its termination and carrying cylinder that inserts carrying cylinder is provided with fixed pin holes, and goes up pin 106 connections and fix by inserting it; One or two linings 107 are housed in carrying cylinder, wherein installing a spanner torsion bar 108, it is the square toes of coupling bush that frame end is installed at the torsion bar place, be connected with sleeve pipe 109 on its square toes, and connect input shaft clamper 6, turn round spanner 7 and adorn a survey in the other end torsion bar termination of support tube; Described Hydraulic Station is installed in the bottom in the supporting station; It has to connect surveys oil pressure indicator and the delivery pipe that supplies change-speed box on the pressure test gauge panel, on its dish a plurality of oil pipe and compression indicators that are used to survey oil pressure are housed also.Figure 11 is the Hydraulic Station work system.Its Hydraulic Station includes electrical motor 201, oil pump 202, fil 203, fuel tank 204, precursor overflow valve 205, reducing valve 206, compression indicator 207, the high definition fil 209 when flow regulating valve 208 and filtering oil etc.Constitute working connection output 300 by it, decompression oil circuit output 301, and the filtering oil circuit 302 of the precision of raising system oil.Its working connection is to the change-speed box fuel feeding, and the decompression oil circuit can use in the fluid control valve that detects change-speed box, realizes its measuring ability with the pressure of adjusting reducing valve.

Fig. 2 and erection of transmission frame 105 shown in Figure 3, it is a kind of multi-functional erecting frame, can adapt to the use of different car type change-speed boxs.It comprises the tube head 1051 that cooperates with support tube 104, the connecting panel 1052 that fuses is arranged on it, have four position adjustments holes 1053 on the plate, wherein: two inclinations and line of centers (30 °-60 °) are at an angle arranged, two horizontal arrangement, and on its hole, have bolt 1054 to connect the bar 1055 of positioning fixed installation change-speed box, and it is four.On its bar, be provided with connecting bore 1056 with the bolt change-speed box.

Fig. 4, Fig. 5 and shown in Figure 6, the defeated axle of change-speed box clamper 6, it comprises the clamper plate 601 that has six square toes, middle is square hole and the clamping frame 602 of dividing two halves at the center equally, the clamping frame of dividing equally is connected fastening fastening bolt 603, nut 604, and, a nylon grip block 606 is housed in its square hole with the bolt 605 that clamping frame is captiveed joint with the clamper plate, its piece is two halves, close and be loaded in the square hole, and profile is trapezoidal 607, interior semicircle orifice.On its hole, have the groove 608 that tightens.

Fig. 7 and transmission output shaft tension device 8 shown in Figure 8, it comprises the nylon jacket of inserting in the transmission output shaft splined hole 801, it puts and has mouthfuls 802 the splash ringfeders 803 and have the push rod 804 of square toes that rise, its ringfeder of splashing has four grooves 805 that expand of splashing, described nylon jacket is enclosed within the termination of the ringfeder of splashing, its push rod is threaded, and is contained in its ringfeder of splashing.

The corner proving installation 9 that Fig. 9 and transmission output shaft shown in Figure 10 are used.With corner proving installation 9, it is by rotating shaft 901 by transmission output shaft for it, clamping cap 902 spring coils 903, and scale rotation angle disk 904, pointer 905, pointer bolt of rear end plate 906, and support 907 is formed; Described rotating shaft one end is for connecting square toes, and the other end is a pointer; Be with the scale rotation angle disk on its axle, its dish is fixed a support, is provided with tapped bore in the back of its dish, installs rotating shaft in the hole, is adorning spring coil in bottom, its hole, and suit clamping nut thereon.

Change-speed box electromagnetic valve shown in Figure 12 detects, driving control device 5.It is by the main control system box 51 of band thin-film switch panel 50, connecting cable line 52, and boxcar 53, and control circuit is formed.The thin-film switch key position of its panel 50 comprises that gear shows 501, open piece key 502, a key 503 falls, gear shift electromagnetic valve manipulating key 504, lock-up solenoid valve manipulating key 505, frequency valve manipulating key 506, duty cycle adjustment knob 507, detect and drive options button 508, live wire and ground wire master mode options button 509 are in type demonstration 510 etc.Described boxcar contains input terminal 531 and lead-out terminal 532.

The motherboard circuit part of control circuit shown in Figure 13, its circuit contains master control chip micro controller system U1, keyboard interface 10PIN, keyboard input scan chip U2, the pio chip U3 of four command valves, the pio chip U4 of all the other valves, crystal resonator RC, change box wiring circuit DB, display panel interface 8PIN, and by aerotron 3D1,3D2,3D3,3D4, diode D1, D2, D3, D4, D5, resistance R 4, R5, R6, R7, R8, R9, the solenoid-driven that relay J 1, J2 and K switch 1, K2 form, protection and testing circuit DJ; Port x TAL1, the XTAL2 of described master control chip U1 is connected with crystal resonator RC, and its port P30 is connected, and connects display panel interface pin 2 with scanning chip U2 command valve pio chip U3, its port AB that adopts valve output U4; The gear shift output port S1 of its U1 ... S5, L1, L2 are connected, and are connected to the pairing end pin of boxcar S1out ... S5out, L1out, L2out; The corresponding connection of port Y11, Y23 of its chip U1 port P37, P33, P34 and change-over switch chip; Its chip Vcc port is the input of 5V voltage; Port output S1 also is connected between the zener diode and resistance R 6 that detects identification circuit DT; Port P16, P17 also meet matched resistance R2, R3, and be connected to keyboard; Its port RST with charge and discharge circuit resistance R 1 capacitor C 1 and be connected; Its resistance, electric capacity polyphone back centre tap are connected to port RST; Chip U1 port P31 connects the port CLK of keyboard scan chip U2 and is connected to change-over switch chip U5 port Y21, Y12, Y41; Chip U1 port GND ground connection; Chip U2 port Q0 ... Q7 connects input keyboard, its port MR power connection+5V; Chip U3 port Q0 links to each other with resistance R 4 among the detection identification circuit JC, and its port CLK is connected to change-over switch chip U5 port out1 and is connected to display panel interface 3; Its port MR, power connection+5V; Chip U4 port Q2 with detect identification circuit TL in resistance R 10 be connected, port Q7 is connected with resistance R 9 among its TL, and is connected to boxcar, its U4 port CLK is connected to change-over switch U5 port out4 and is connected to display panel interface 5, port MR power connection+5V; Change-over switch chip U4 port out2 is connected to display interface 4; Its port out3 is connected to display interface 6, and port Y31 is connected to display interface 7, its port Vcc power connection+5V, its GVD ground connection.

Display circuit part in the control circuit shown in Figure 13, its circuit contains mainboard interface 8PIN, control display chip U6, U7, U8, ten demonstrations of vehicle, individual position shows driving charactron amplifier U9, U10, the U11 that shows with gear, charactron produces the required frequency of electromagnetic valve, the square wave signal generator U12 of EDM Generator of Adjustable Duty Ratio and the corresponding circuit of adjusting; Wherein: output port Q0, the Q1 of display chip U6, the corresponding connection string of Q2, Q3 have indication light-emitting diode S1, S2, S3, the S4 of resistance, and its port Q4, Q5, Q6, Q7 show that with gear pin A, B, C, the D of charactron amplifier U11 are connected; Output port Q2, the Q3 of display chip U7, Q4, Q5, the corresponding connection string of Q6, Q7 have the indication light-emitting diode (with fire, L1, F, S5, L2, detection and driving) of resistance, wherein, be connected therebetween by phase inverter f1, f2 between the light-emitting diode that detects and drive with fire; Output port Q0, the Q1 of display chip U8, Q2, a Q3 vehicle position show that pin A, B, C, the D of digital amplifier are connected; Its port Q4, Q5, Q6, Q7 show that with ten of vehicles digital amplifier pin A, B, C, D are connected; Corresponding A, B among described display chip U6, U7, the U8 are connected with the clock CLOCK line of mainboard interface pin 2, the corresponding respectively mainboard interface pin 3,4,5 that connects of its port MR power connection+5V, its port CLK; Mouth pin A, B, C, D, E, F, G connect charactron among display amplifier U9, U1O, the U11, its corresponding pin LT, BI power connection+5V, pin LE ground connection; Described square wave signal generator U12 pin Vcc power connection+5V, Q output square-wave signal F is connected to mainboard interface pin 6, the adjustment duty cycle signals producer of being made up of resistance, diode, electric capacity on it.

The principle of work of automatic gearbox test:

Test cell comprise that machinery, hydraulic pressure stand and electromagnetic valve detect, actuating device, and they are used in combination, can to full hydraulic control system and electrohydraulic control type automatic transmission with hydraulic torque converter is tested or to its fault cause dynamic diagnosis.

1, mechanical-hydraulic stand part

The omnipotent erecting frame 105 of test cell of use automatic transmission with hydraulic torque converter is the change-speed box 10 of all size model fixedly, then change-speed box and erecting frame is inserted in the carrying cylinder 4 of trestle table 1 together, and uses pin 106 fixing, and change-speed box is contained on the T/S.With multi-function variable-speed device input shaft clamper 6, tighten input shaft, and connect torsion bar 108 and torque spanners 7 with sleeve pipe 109, torsion bar is at lining 107 and carrying cylinder internal support.With splashing of the multi-functional output shaft device 8 chucking output shafts that rise, and corner proving installation 9 is gone up in connection, connect the oil pipe of Hydraulic Station 2 and change-speed box working connection test port, and change-speed box is equipped with the test port of power-transfer clutch and drg is connected with oil pressure indicator on the gauge panel, starting hydraulic motor 201 and oil pump 202, the manual control band stream valve of operating system is pressed the relevant position, the cut-in pressure table, remove the change-speed box drain pan, by observation to force value and oil liquid leakage, but the mode of operation of testing hydraulic control system.Use torque spanner to rotate input shaft, observe, promptly can turn to change over condition and make detection and discriminatory analysis gear by corner to angle station.Under different gear stages, adopt corresponding means, lock fixedly output shaft, rotate torque spanner, the test breakaway torque with electromagnetic valve detection, actuating device.Then under the situation of locking output shaft not, rotate (forward and reverse) torque spanner and can record rotational resistance torque each range state under, analyze comparison and can test the installation situation of respectively carrying out Transmission and the part of change-speed box and have defective and fault.

The reducing valve 206 of the decompression oil circuit 301 of operation electromagnetic valve detecting device or Hydraulic Station can make shifting of transmission.

2, electromagnetic valve detection, actuating device

(1) work of compatibility test stand, Wiring port with boxcar 53 grafting change-speed boxs, the driving of the panel switch 50 of operating host box 51 connects key, and select accurately change-speed box model coding, and press the gear key 502 that upgrades, and lock key 505 and adjust dutycycle knob 507, just can do gear shift, locking, oil pressure to automatic transmission with hydraulic torque converter and regulate and control, test the responsive state of automatic transmission with hydraulic torque converter.

(2) the independent use.Use it to detect in the automotive operation, boxcar 53 is connected on the input end 532 of automatic transmission with hydraulic torque converter, and its input port is connected 531 with the mouth of car control computer, make that electromagnetic valve detects, the measuring ability key 508 on the host box 51 of actuating device, vehicle options button 510, can be in road examination to the computer of the control change-speed box of automobile, the gear shift of change-speed box, locking and oil pressure conditioning signal are made test.When using the driving key 508 of motherboard face, host computer control and will with the circuitry cuts of the boxcar that connects the Automotive transmission computer, only need corresponding lifting shelves key 502,503 of operation or lock key 505, oil pressure adjusting knob 507 can carry out each actions such as gear shift, locking or oil pressure adjusting of change-speed box by horizontal wall inscription automobile computer signal.The fault of automatic transmission with hydraulic torque converter is done the analysis and the diagnosis of automatically controlled part.

(3) circuit working principle.

Electromagnetic valve detects the circuit of actuating device and mainly is made up of motherboard circuit, display board circuit and boxcar three parts.Motherboard circuit is the control core of this device, be as control chip with 89C2051 micro controller system U1, inner in store control command, be used to detect the input of keyboard, the control signal of the electromagnetic valve of output, detect incoming signal and storage and read the solenoid control information of internal memory, its keyboard input and output circuit all adopts the serial circuit of micro controller system to realize.U2 forms the serial input circuit by a slice 74LS164 chip; 2 * 8 dynamic keyboard; cooperate with diaphragm panel switch 50 and to finish incoming signal and be afraid of identification; five command valves of change-speed box; the output signal of two shutoff valves and a frequency valve adopts two 74LS164 chip U3; the U4 transformation from serial to parallel produces; utilize CD4081 NAND gate integrated circuit U5 as change-over switch; mainboard also comprises and utilizes large power triode 3AD50; 3D1; 3D2; 3D3; driving circuit for electromagnetic valve and short-circuit protection circuit that 3D4 etc. constitute; testing circuit aerotron D1; D2 realizes; and return to carry out the identification of live wire and ground wire, signal is cooperated by input of single chip to be judged with corresponding software.System has also adopted little relay road J1, J2 on two to finish driving respectively, has detected the switching of live wire input and the switching of ground wire.The soft of system year be general purpose control software, and contain the activation bit of the electromagnetic valve of the various vehicles of having solidified.Very convenient user calls.

Display circuit is mainly used in display system output electromagnetic valve situation, gear and model data, produce the adjustable square-wave signal of the required accounting of frequency valve in addition, show that the output electricity utilizes 74LS164 chip U6, U7, U8 serial output, the direct drive light-emitting diode is exported the electromagnetic valve working condition respectively, and configuration CD4511 charactron typical case driving circuit U9, U10, U11 shows output gear and model data, the required fixed frequency of frequency valve is by integrated circuit NC555U12, matched resistance and diode have constituted the adjustable signal generator of dutycycle on a large scale, and it cooperates output corresponding driving electromagnetic valve signal with NAND gate circuit in the mainboard.

Boxcar is used for the electromagnetic valve detecting device and is connected with the conversion of electromagnetic valve, utilize the relay J 1 and the J2 of two four contacts of detection drive of mainboard output, guarantee the not anti-phase change-speed box controlling computer that seals in of output model under the car driving situation, with anti-tamper, guarantee that under detection case change speed gear box controlling computer output signal divides two-way to give the terminal electromagnetic valve respectively and the input main frame detects.In addition, also comprise the electromagnetic valve operating mode testing circuit that diode constitutes, whether with the short circuit that detects the electromagnetic valve that is driven.

Claims (7)

1, a kind of automatic gearbox maintenance test bench set is characterized in that being the Hydraulic Station (2) of change-speed box fuel feeding by test supporting station (1), oil pressure testing gauge panel (3), bench board (4) is formed, and comprises that the electromagnetic valve of an automatic transmission with hydraulic torque converter (10) detects actuating device (5); Described test supporting station (1) comprises bearing support (101), panel all around (102), top board (103), a carrying cylinder (104) has been welded on bearing support top, its an end plug-in mounting erection of transmission frame (105), the center of erecting frame is a hollow hole, and its termination and carrying cylinder that inserts carrying cylinder is provided with fixed pin holes, and pin (106) connects on it by inserting; One or two linings (107) are housed in carrying cylinder, wherein installing a spanner torsion bar (108), it is the square toes that connecting sleeve pipe that frame end is installed at the torsion bar place, be connected with sleeve pipe (109) on its square toes, and connect input shaft clamper (6), turn round spanner (7) and adorn a survey in the other end torsion bar termination of support tube; Described Hydraulic Station is installed in the bottom in the supporting station; It has to connect surveys oil pressure indicator and the delivery pipe that supplies change-speed box on the pressure test gauge panel, on its dish pressure measurement oil pipe and the compression indicator that at least one surveys oil pressure is housed also.

2, a kind of automatic gearbox maintenance test bench set according to claim 1, it is characterized in that described erecting frame (105), comprise and insert the support tube termination for connecting tube head (1051), the connecting panel (1052) that fuses is arranged on it, have four position adjustments holes (1053) on the plate, wherein: two are in tilted layout, two horizontal arrangement, and on its hole, there is bolt (1054) to connect the bar (1055) of positioning fixed installation change-speed box, and be four, on its bar, be provided with connecting bore (1056) with the bolt change-speed box.

3, a kind of automatic gearbox maintenance test bench set according to claim 1, it is characterized in that described input shaft clamper (6), comprise the clamper plate (601) that has six square toes, the centre is for square hole and divide evolution clevis frame (602) equally, to divide clamping frame bonded assembly bolt, nut (603,604) equally, and the bolt (605) that clamping frame is captiveed joint with grip block, the nylon grip block of in its clamping frame square hole, installing (606), its piece is that two halves close and are loaded on square hole, and profile is trapezoidal (607), interior semicircle orifice has the groove (608) that tightens on its hole.

4, a kind of automatic gearbox maintenance test bench set according to claim 1, it is characterized in that also comprising a transmission output shaft tension device (8), comprise the nylon jacket of inserting in the transmission output shaft spline trepanning (801), it puts and has one rise mouthful (802); The ringfeder (803) of splashing has the push rod (804) of square toes; Its ringfeder of splashing has four grooves (805) that rise of splashing, and described nylon jacket is enclosed within the termination of the ringfeder of splashing, and its push rod is threaded, and is contained in its ringfeder of splashing.

5, a kind of automatic gearbox maintenance test bench set according to claim 1, it is characterized in that also comprising transmission output shaft corner proving installation (9), it is by rotating shaft (901), clamping cap (902) spring coil (903), scale rotation angle disk (904), pointer (905), pointer bolt of rear end plate (906), and support (907) is formed; Described rotating shaft one end is for connecting square toes, and the other end is a pointer; Be with the scale rotation angle disk on its axle, its dish is fixed a support, is provided with tapped bore in the back of its dish, installs rotating shaft in the hole, is adorning spring coil in bottom, its hole, and suit clamping nut thereon.

6, a kind of automatic gearbox maintenance test bench set according to claim 1, it is characterized in that described automatic transmission with hydraulic torque converter electromagnetic valve detection, actuating device (5) are by the main control system box (51) of being with thin-film switch panel (50), connecting cable line (52), boxcar (53), and control circuit is formed; Described circuit comprises mainboard control circuit, display circuit and conversion junction circuit three parts composition; Wherein: governor circuit contains main control singlechip (U1), keyboard interface 10PIN, keyboard input scan chip (U2), the pio chip of four command valves (U3), it adopts valve output (U4), change-over switch AND circuit chip (U5), crystal resonator (RC), boxcar wiring circuit (DB), display panel meets (8PIN), and by aerotron (3D1), (3D2), (3D3) (3D4) diode (D1), (D2), (D3), (D4), (D5), resistance (R4), (R5,) (R6), (R7,) (R8), (R9), relay (J1), (J2) and switch (K1), (K2) solenoid-driven of Zu Chenging, protection and testing circuit (DJ); The port of described master control chip (U1) (XTAL1, XTAL2) is connected with crystal resonator (RC), its port (P30) is connected with scanning chip (U2) command valve pio chip (U3), its port (AB) of adopting valve output (U4), and connects display panel interface pin (2); Gear shift output port (the S1 of its (U1) ... S5, L1, L2) be connected, and be connected to the pairing end pin of boxcar (S1out ... S5out, L1out, L2out); Port (Y11), (Y23) corresponding connection of its chip (U1) port (P37), (P33), (P34) and change-over switch chip; Its chip Vcc port is the input of 5V voltage; Port output S1 also is connected between the zener diode and resistance (R6) that detects identification circuit (DT); Port (P16, P17) also connects matched resistance (R2, R3), and be connected to keyboard; Its port (RST) with charge and discharge circuit resistance (R1) electric capacity (C1) and be connected; Its resistance, electric capacity polyphone back centre tap are connected to port (RST); Chip (U1) port (P31) connects the port (CLK) of keyboard scan chip (U2) and is connected to change-over switch chip (U5) port (Y21, Y12, Y41); Chip (U1) port (GND) ground connection; Chip (U2) port (Q0 ... Q7) connect input keyboard, its port (MR) power connection (+5V); Chip (U3) port (Q0) links to each other with resistance R 4 in the detection identification circuit (JC), and its port (CLK) is connected to change-over switch chip (U5) port (out1) and is connected to display panel interface (3); Its port (MR), power connection (+5V); Chip (U4) port (Q2) is connected with resistance (R10) in the detection identification circuit (TL), port (Q7) is connected with resistance (R9) in its (TL), and be connected to boxcar, its (U4) port (CLK) is connected to change-over switch (U5) port (out4) and is connected to display panel interface (5), port (MR) power connection (+5V); Change-over switch chip (U4) port (out2) is connected to display interface (4); Its port (out3) is connected to display interface (6), and port (Y31) is connected to display interface (7), its port (Vcc) power connection (+5V), its (GVD) ground connection.

7, a kind of automatic gearbox maintenance test bench set according to claim 6, it is characterized in that described display circuit contains mainboard interface (8PIN), control display chip (U6), (U7), (U8), ten demonstrations of vehicle, individual position shows driving charactron amplifier (U9), (U10), (U11) that shows with gear, charactron produces the required frequency of electromagnetic valve, square wave signal generator of EDM Generator of Adjustable Duty Ratio (U12) and the corresponding circuit of adjusting; Wherein: the corresponding connection string of the output port of display chip (U6) (Q0, Q1, Q2, Q3) has the indication light-emitting diode (S1, S2, S3, S4) of resistance, and its port (Q4, Q5, Q6, Q7) shows that with gear the pin (A, B, C, D) of charactron amplifier (U11) is connected; The corresponding connection string of the output port of display chip (U7) (Q2, Q3, Q4, Q5, Q6, Q7) has the indication light-emitting diode (with fire, L1, F, S5, L2, detection and driving) of resistance, wherein, be connected therebetween by phase inverter (f1, f2) between the light-emitting diode that detects and drive with fire; The output port of display chip (U8) (Q0, Q1, Q2, a Q3) vehicle position shows that the pin (A, B, C, D) of digital amplifier is connected; Its port (Q4, Q5, Q6, Q7) shows that with ten of vehicles digital amplifier pin (A, B, C, D) is connected; Corresponding (A, B) in the described display chip (U6, U7, U8) is connected with clock (CLOCK) line of mainboard interface pin (2), its port (MR) power connection (+5V), the corresponding respectively mainboard interface pin (3,4,5) that connects of its port (CLK); Mouth pin (A, B, C, D, E, F, G) connects charactron in the display amplifier (U9, U10, U11), its corresponding pin (LT, BI) power connection (+5V), pin (LE) ground connection; Described square wave signal generator (U12) pin (Vcc) power connection (+5V), pin (Q) output square-wave signal (F) is connected to mainboard interface pin (6), the adjustment duty cycle signals producer of being made up of resistance, diode, electric capacity on it.

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