JPS6326752Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a connection device between an engine and a dynamometer in engine load testing.

BACKGROUND OF THE INVENTION Conventionally, engines completed at an assembly factory are subjected to predetermined inspections before being shipped. The device for connecting the engine and dynamometer in engine load tests is simple, the connection and disconnection work can be done quickly and easily, and furthermore, the power performance test can be performed in accordance with the actual situation. being considered. Automotive engines generally come in two types: gear drive and torque converter drives, but due to production lines, load tests are performed using the same dynamometer.

Conventionally, in a gear drive type engine, a spline hole is provided in the center of the clutch, and a matching spline is formed at the tip of the main drive gear of the transmission. The tip of the meter was formed into a spline shaft similar to the main drive gear, and the engine and the dynamometer were connected by fitting and engaging this. However, in a torque converter drive type engine, the torque converter adapter is only attached to the rear end of the crankshaft, and there is no spline hole as described above, so remove several bolts for attaching the torque converter adapter, and insert the bolt into the empty screw hole. A torque converter side adapter having a spline hole in the center was attached, and the spline shaft at the end of the dynamometer was fitted and engaged to connect the engine and the dynamometer.

Problems that the invention aims to solve: In gear drive type engines, there is no problem because the flywheel and clutch have shock absorbing parts, but in torque converter drive type engines, there is no such device. Noise caused by bumps and bumps in the spline section makes load testing difficult, and the dynamometer drive shaft frequently breaks due to fluctuations in engine rotation and torque, making it difficult to perform load testing smoothly. There were flaws.

Means for Solving the Problems A guide protrusion 25 that is coaxially connected to the shaft of a dynamometer and that can be fitted into a bearing hole 2b provided at the rear end of the crankshaft 2 of the engine 1, and a gear drive type engine. A connecting drive shaft 27 has a spline shaft 26 that can engage with the spline hole of the clutch, and a buffer pushbutton is integrally attached to the shaft side end of the dynamometer from the spline shaft 26 of the connecting drive shaft 27, and has a buffer pusher on the periphery. A dynamometer side adapter 28 having a dynamometer side adapter 31 and a connecting pin 13 which can be fixed to the rear end of the crankshaft 2 and can be engaged with the buffer pusher 31 are provided on the periphery, and a connecting drive is provided at the center. Torque converter side adapter 9 provided with a housing hole 14 that separately accommodates the spline shaft 26 of the shaft 27
When performing a load test on a torque converter drive type engine, after fixing the torque converter side adapter 9 to the rear end of the crankshaft, the connecting drive shaft is moved closer and the buffer bushing 31 is engaged with the connecting pin 13. At the same time, by fitting the guide protrusion 25 into the bearing hole 2b and the spline shaft 26 into the accommodation hole 14 of the torque converter side adapter 9, the crankshaft and the shaft of the dynamometer are connected. A connection device between an engine and a dynamometer in a load test is characterized by:

Function From the configuration of this devised device, if the engine is a gear drive type, the connection between the engine and the dynamometer is simply by inserting the drive shaft for connecting the dynamometer into the bearing hole at the rear end of the crankshaft, and by inserting the spline shaft into the bearing hole at the rear end of the crankshaft. This can be done easily and quickly by fitting the clutch into the spline hole and tightening the housing with the mounting bolts.If the engine is a torque converter drive type, the dynamometer can be left as is, and the torque converter adapter can be installed only on the engine side. Install the torque converter side adapter using the mounting bolt hole, fit the connection pin near the outer periphery of this torque converter side adapter into the connection hole of the dynamometer side adapter provided on the connecting driveshaft, and connect the center tip connection part to the crankshaft. The connection is made by fitting the spline shaft into the bearing hole of the torque converter side adapter and inserting the intermediate spline shaft into the receiving hole of the torque converter side adapter. In this way, since the gear drive type is equipped with a flywheel and clutch device on the engine side itself, all load tests can be performed with a direct connection by fitting and meshing the connecting drive shaft with a spline shaft. Even if it is a torque converter drive type, the torque converter side adapter and dynamometer side are disk-shaped, so
The flywheel itself performs the function of a flywheel to help the engine run smoothly, and the connection hole is equipped with a cushioning bushing made of vibration-proof rubber or other cushioning material, which reduces the rotation and torque on the engine side. Even if there is a fluctuation in the value, this can be absorbed by the bushing.

Description of the embodiment The present invention will be described below with reference to the drawings, which are an example of the embodiment. In Figs. 3 and 4, 1 is a passenger car engine, which shows the rear end of a torque converter drive type crankshaft, and 2 is a crankshaft.
The rear end face 2a of the torque converter 8 has six screw holes 3 at equal intervals on the same circumference, and the torque converter adapter 8 is usually attached with six mounting bolts 7. Every other one of the mounting bolts 7 is removed, and the torque converter side adapter 9 according to the present invention is attached to the rear end face of the torque converter adapter 8 with separately prepared mounting bolts 10. The mounting portion 9a of the adapter 9 is formed in a cylindrical shape, and is provided with a receiving hole 14 that passes through its center, and mounting holes 11 that pass through at positions corresponding to every other mounting screw hole 3 of the torque converter adapter. A flange 12 is formed integrally with the outer edge of the mounting portion 9a, and a connection pin 13 is provided on the outer periphery of the flange so as to protrude rearward. The mounting portion 9 of the connection pin
The bearing holes 2b are provided on the rear end surface 2a of the crankshaft 2, and the mounting bolts 7 are provided at equal intervals (four locations in the figure) on the same circumference with the central axis of the crankshaft 2 as a reference, and are parallel to the axis.
This is an escape route.

As shown in FIGS. 1 and 2, the dynamometer 20 has both ends of its shaft 21 protruding from front and rear wall surfaces 20a and 20b, respectively, and is supported by bearings 23 and 23 provided on a frame 22. . Then, the shaft 21 is connected to the connection side end 21a of the shaft 21.
A coupling drive shaft 27 is coaxially coupled to the coupling drive shaft 27 by a coupling ring 24. This driveshaft 2
The tip of 7 is the rear end surface 2a of the crankshaft 2.
formed on the guide protrusion 25 that fits into the bearing hole 2b,
A spline shaft 2 that can mesh with a spline hole provided in a clutch of a gear drive type engine is inserted halfway between the tip and base of the drive shaft 27.
Form into 6. A disk-shaped dynamometer-side adapter 23 is fitted to the outer periphery of the connection side of the connection drive shaft 27 in the coupling ring 24, and a mounting hole 29 penetrating the front and rear surfaces of the dynamometer-side adapter 28 is inserted into the connection pin. 13, and attach a rubber cushioning bushing 31 having a connection hole 30 at the center to each of the attachment holes 29, and move the dynamometer 20, for example, to the connection hole 30 on the torque converter side. The connecting pin 13 of the adapter 9 is provided so as to be fitable therein. In this embodiment, the dynamometer side adapter 28 is provided with a fitting hole 32 in the center as shown in the figure, and a mounting screw hole 33 is provided in correspondence with the tightening bolt hole 34 of the coupling ring 24. Therefore, the coupling ring 24 itself can be tightened and the dynamometer adapter 28 can be installed at the same time.

A housing 36 that approximately accommodates the dynamometer side adapter 28 is attached to the front surface of the frame 22, and a connecting portion 37 with the rear end surface of the engine 1 is provided on the front surface of the housing, and mounting bolts 38, 38 ( (see Figure 5).

Since the embodiment of this invention is constructed as described above, for example, in the final process of an engine assembly line, engines flowing one after another are guided to a load test site and then stopped, and then connected to the dynamometer 20. In the case of the torque converter drive type engine 1, as mentioned above, remove several mounting bolts 7 of the torque converter adapter 8 attached to the rear end of the crankshaft 2, for example, every other three as shown in the figure. ,
After attaching the torque converter side adapter 8 with another long mounting bolt 10 and setting the engine in this state, bring it close to the dynamometer 22 and insert the guide protrusion 25 at the tip of the connecting drive shaft 27 to the rear of the crankshaft 2. Insert it into the bearing hole 2b at the end, then rotate the shaft 21 of the dynamometer 20, make the connection hole 30 of the dynamometer side adapter 28 and the connection pin 13 of the torque converter side adapter 9 face each other, bring them close together, and then fit it in. Then, insert the spline shaft 26 of the coupling drive shaft 27 into the accommodation hole 14 of the torque converter side adapter 9, and insert the guide protrusion 2 at the tip.
5 into the bearing hole 2b. During this connection work, if the connection pins 13 are arranged every 90 degrees as shown in the figure, but the connection holes 30 are arranged every 45 degrees, the shaft 21 of the dynamometer 20 can be rotated by a maximum of 22.5 degrees.
Torque converter side adapter 9 and dynamometer adapter 28
It is possible to connect with. Finally, a load test is performed by completely connecting the front side of the housing 36 to the engine 1 and the dynamometer 20. After the test is completed,
This separation of the engine 1 and the dynamometer 20 is performed in the reverse order of the connection work described above, and the torque converter side adapter 9 is removed again, and the mounting bolt 7 is tightened again.

Next, if the engine is a gear drive type engine, first insert the connecting drive shaft 27 and the guide protrusion 25 at the tip into a bearing hole similar to the rear end bearing hole 2b of the crankshaft 2 of the torque converter drive type engine described above. Then, the spline shaft portion 26 is fitted into the spline hole of the clutch, and the engine and the dynamometer are completely connected by screwing the engine and the housing 36, and a predetermined load test is performed. Then, the engine 1 and the dynamometer 20 are disconnected from each other in the reverse order as described above, and the engine 1 is sent out from the load test site again.

Effects of the invention As is clear from the above explanation, if the engine is a gear drive type, the connection between the engine and the dynamometer is simply by inserting the drive shaft for connecting the dynamometer into the bearing hole at the rear end of the crankshaft. This can be done easily and quickly by fitting the spline shaft into the spline hole of the clutch and tightening the housing with the mounting bolts.If it is a torque converter drive type, the dynamometer can be left in the same configuration and attached to the engine side. With the torque converter side adapter, which can be easily installed using the mounting bolt hole of the torque converter adapter, the connecting pin near the outer periphery of the torque converter side adapter is inserted into the connection hole of the dynamometer side adapter provided on the coupling drive shaft. However, since the connection is made by fitting the center tip connection part into the bearing hole of the crankshaft and inserting the midway spline shaft into the accommodation hole of the torque converter side adapter, the connection work is done by the gear drive type. Comparatively speaking, it is simple, requiring only the addition of an adapter on the torque converter side, and the dynamometer side can be directly connected to any type of engine.

Next, in terms of connection performance, since the gear drive type is equipped with a flywheel and clutch device on the engine side, all loads are handled by a so-called direct connection in which the connecting drive shaft with a spline shaft is fitted and engaged. Even with the torque converter drive type, the torque converter side adapter and dynamometer side adapter are disk-shaped, so they themselves function as flywheels and help the engine rotate smoothly. , and the connection hole is equipped with a cushioning bushing using a cushioning material such as anti-vibration rubber, so that even if there are fluctuations in rotation and torque on the engine side, this will be absorbed by the bushing, and the connecting drive shaft This prevents breakage accidents, improves load test work efficiency, and prevents the occurrence of abnormal noises that tend to occur with conventional spline shafts.

Note that in this embodiment, the dynamometer side adapter 28
Although the shock absorbing bush 31 is provided on the torque converter side adapter 9 and the connecting pin 13 is provided on the torque converter side adapter 9, these may be arranged in the opposite manner.

[Brief explanation of the drawing]

Figure 1 is a partially sectional side view of this devised connecting device.
Figure 2 is a front view showing the main parts of the connection device, Figure 3 is a longitudinal sectional view showing the torque converter side adapter used when connecting to a torque converter drive type engine and how it is attached to the rear end of the crankshaft of the engine;
FIG. 4 is a rear view of the torque converter side adapter, and FIG. 5 is a partially sectional side view showing the state of connection between the torque converter drive type engine and the dynamometer. 1...Passenger car engine, 2...Crankshaft, 3...Screw hole, 7...Mounting bolt, 8...
Torque converter adapter, 9... Torque converter side adapter, 10... Mounting bolt, 11... Mounting hole,
12...Flange, 13...Connection pin, 14...
Accommodation hole, 20...Dynamometer, 21...Shaft, 2
2... Frame, 23... Bearing, 24... Coupling, 25... Guide protrusion, 26... Spline shaft, 27... Drive shaft, 28... Dynamometer adapter..., 29... Mounting hole, 30... Connection hole,
31...butsuyu, 36...housing, 37...
...Connection part, 38...Mounting bolt.

Claims (1)

[Scope of utility model registration request] A guide protrusion 25 is connected coaxially with the shaft of the dynamometer and can be fitted into a bearing hole 2b provided at the rear end of the crankshaft 2 of the engine 1, and can be engaged with a spline hole of a clutch in a gear drive type engine. A connecting drive shaft 27 having a spline shaft 26, and a dynamometer side adapter that is integrally attached to the end of the connecting drive shaft 27 on the shaft side of the dynamometer from the spline shaft 26, and is provided with a cushioning bush 31 on the peripheral edge. 28, and a connecting pin 13 which can be fixed to the rear end of the crankshaft 2 and can be engaged with the buffer bushing 31 are provided on the periphery, and the spline shaft 26 of the connecting drive shaft 27 is spaced from the center. Torque converter side adapter 9 equipped with an accommodation hole 14 for accommodating
When performing a load test on a torque converter drive type engine, after fixing the torque converter side adapter 9 to the rear end of the crankshaft, the connecting drive shaft is moved closer and the buffer bushing 31 is engaged with the connecting pin 13. The crankshaft and the shaft of the dynamometer are connected by fitting the guide protrusion 25 into the bearing hole 2b and the spline shaft 26 into the accommodation hole 14 of the torque converter side adapter 9. A connection device between an engine and a dynamometer in a load test, characterized by: