CN203745202U - Test engine rear power take-off - Google Patents

Abstract

The utility model discloses a rear power takeoff of an engine for test. The rear power takeoff comprises a shell, a transitional connection disk and a flange shaft sleeve. A first main shaft is rotationally mounted in the shell, and connected with a second main shaft via a spline, the other end of the second main shaft is provided with an external spline, a spline-shaft spacer sleeve sleeves the second main shaft, and the spline-shaft spacer sleeve abuts against the end surface of the spline in the rear power takeoff output end. The shell is mounted on the transitional connection disk, and the transitional connection disk is mounted on a flywheel casing of the engine. The flange shaft sleeve sleeves the other end of the first main shaft, and is connected with a universal shaft coupling of a rear power takeoff testing stand via a fastener. When different specifications of engines are tested, it is only required to change the transitional connection disk, the second main shaft and the spline-shaft spacer sleeve in the rear power takeoff of the engine to complete assembly, thereby reducing the cost of tools, shortening the preparation period for test, and improving the utilization rate of the testing stand.

Description

Test engine rear power take-off

technical field

The utility model relates to an engine performance testing tool, in particular to an engine rear power take-off for testing.

Background technique

The rear power take-off mechanism is one of the important accessories of the engine. It plays an important role in the output of working torque in a variety of construction machinery models. It also consumes a certain amount of power while outputting torque. Therefore, in order to ensure safe, reliable and smooth completion of the rear power take-off work, it is necessary to control the rear take-off of the engine. The output structure of the power end is subjected to a bench test to simulate the actual working conditions of the power take-off of the engine; however, in the actual bench test, because there are many types of splines in the power take-off output end of the engine, it is necessary to design a general-purpose The rear power take-off is very necessary to meet the needs of engines with different spline structures.

At present, in the engine rear power take-off bench test, there are two ways to connect the rear power take-off output end in the form of a spline with the bench measurement and control system: as shown in Figure 1, the first prior art method is through one end is The other end of the external spline is connected by the spline shaft 23 of the flange, and the spline end of the spline shaft 23 is directly connected with the internal spline of the power take-off output end 5 of the engine, and the flange end of the spline shaft 23 is Link to each other with the universal joint 17 of stand, connect in this way and transmit power. For the first method, since the entire transmission system has no radial support, the shaft system will generate radial force on the spline shaft 23, which will accelerate the wear of the spline shaft 23, and the reliability is not high; at the same time, this structure has no seal oil Oil seal, there is a problem of oil loss in the engine gearbox, which can easily cause damage to the engine due to low engine oil pressure; The internal spline structure of the power output end 5 may be different, so it is necessary to design different spline shafts 23 to meet the test requirements. Due to the structure of the spline shaft 23, one end is a larger disc and the other end is a spline shaft , the processing technology is more complicated. As shown in Figure 2, the second prior art method is to connect through a special rear power take-off, and design the special rear power take-off, transition Connecting plate 1 and rear power take-off spline shaft 24, after the transition connecting plate 1 is completed, the connection between the power take-off and the flywheel housing 16 is fixed, and one end of the rear power take-off spline shaft 24 is connected to the internal spline of the engine rear power take-off output Connect the universal coupling 3 of the stand to complete the transmission of power. For the second method, although the special rear power take-off meets the test requirements of a certain type of rear power take-off, after the engine is replaced, due to the change of the internal spline structure of the rear power take-off output end 5 of the engine, and The change in the structure of the flywheel housing 16 has caused the special rear power take-off to be unusable, and the special rear power take-off must be redesigned to meet the test requirements, which is a huge waste in terms of processing cost and processing cycle.

Utility model content

The technical problem to be solved by the utility model is: to provide a test engine rear power take-off, when replacing engines of different specifications, only the transition connection plate, the second main shaft and the flower in the universal engine rear power take-off need to be replaced. The key spacer can be assembled, which reduces the cost of tooling production, shortens the test preparation period, and improves the utilization rate of the test bench.

In order to solve the above-mentioned technical problems, the technical solution of the present invention is: the rear power take-off of the test engine, including

Outer sleeve, the first main shaft is installed in rotation in the outer sleeve, one end of the first main shaft is connected with the second main shaft through a spline, and the other end of the second main shaft is provided with the rear power output end of the engine. An external spline that is compatible with the spline, a spline shaft spacer is set on the second main shaft, and the spline shaft spacer is against the end surface of the internal spline of the rear power output end of the engine;

A transition connection plate, the transition connection plate has a hollow cavity, the second main shaft protrudes from the cavity, the jacket is installed on the transition connection plate through fasteners, and the transition connection plate is tightened the firmware is mounted on the flywheel housing of the engine;

A flange bushing, the flange bushing is sheathed and installed on the other end of the first main shaft through a fastener, and the flange bushing is connected to the rear power take-off test bench of the engine through a fastener. Connect to the coupling.

Preferably, the outer casing includes an outer casing and an outer casing end cap installed together by fasteners, a bearing installation cavity is arranged in the outer casing, two bearings are installed in the bearing installation cavity, and the two bearings A bearing spacer is arranged between them, and the first main shaft is installed on the two bearings.

Preferably, two ends of the bearing installation cavity are respectively provided with an oil seal, a lubricating oil chamber is formed between the outer casing and the bearing spacer, and a lubricating oil filling chamber communicating with the lubricating oil chamber is provided on the outer casing. The lubricating oil filling port is provided with a lubricating oil filling plug.

Preferably, a threaded hole is provided at the end of the first main shaft close to one end of the flange bushing, and a pressing block installation groove is provided on the flange end surface of the flange bushing, and the pressing block installation groove passes through A bolt is pressed with a pressing block, and the bolt is installed in the threaded hole.

Adopting the above-mentioned technical scheme, the beneficial effects of the utility model are as follows: due to the jacket, the transition connection plate and the flange bushing of the universal engine rear power take-off, the first main shaft is installed in rotation in the outer jacket, and the first main shaft passes through the spline It is connected with the second main shaft, and the other end of the second main shaft is provided with an external spline matching the internal spline of the rear power take-off output end of the engine. The firmware is installed on the flywheel housing of the engine; the flange bushing is connected with the universal coupling of the power take-off test bench behind the engine through fasteners, and when the engine is replaced by the power take-off test bench behind the engine , because the general-purpose rear power take-off only needs to replace the transition connection plate, the second main shaft and the spline shaft spacer, these three parts have simple structure, simple processing technology, and low manufacturing cost, which greatly reduces the test preparation cost and shortens the test time. The test preparation period improves the utilization rate of the test bench. The universal rear power take-off is suitable for all rear power take-off engine models; by installing the universal rear power take-off, the torsional force at the output end of the rear power take-off can be reliably transmitted To the measurement system, so as to accurately measure the output power of the rear force. When replacing engines of different specifications, the assembly can be completed only by replacing the transition connection plate, the second main shaft and the spline spacer in the rear power take-off of the general-purpose engine, which reduces the cost of tooling production, shortens the test preparation period, and improves the test bench. rack utilization purposes.

Description of drawings

Fig. 1 is the reference diagram of the state of use of the first prior art;

Fig. 2 is the reference diagram of the state of use of the second prior art;

Fig. 3 is a structural representation of the utility model;

Fig. 4 is an exploded view of parts of the utility model;

Fig. 5 is the reference diagram of the use status of the utility model;

Among them: 1. Transition connection plate; 2. Flange bushing 2; 3. First main shaft; 4. Second main shaft; 5. Rear power output end; 6. Spline shaft spacer; , Outer body end cover; 9, Bearing installation cavity; 10, Bearing; 11, Bearing spacer; 12, Oil seal; 13, Lubricating oil cavity; 14, Lubricating oil filling port; 15, Lubricating oil filling plug; 16, Flywheel housing; 17. Universal coupling; 18. Threaded hole; 19. Press block installation groove; 20. Bolt; 21. Press block; 22. Thrust spring; 23. Spline shaft; 24. Rear force spline shaft.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

As shown in Figures 3 and 4 together, the engine rear power take-off used in the test includes an outer casing, a transition connection plate 1 and a flange bushing 2 .

A first main shaft 3 is installed in rotation in the jacket, and one end of the first main shaft 3 is connected with a second main shaft 4 through a spline, and the other end of the second main shaft 4 is provided with an internal spline suitable for the rear power output end 5 of the engine. With the external spline, the second main shaft 4 is equipped with a spline shaft spacer 6, the spline shaft spacer 6 is against the end face of the internal spline at the rear power output end 5 of the engine, and the spline shaft spacer 6 It plays the role of radial support for the entire transmission system, effectively avoids the wear of the second main shaft 4, and greatly improves the reliability. Wherein, the outer casing includes an outer casing 7 and an outer casing end cap 8 installed together by fasteners, and a bearing installation cavity 9 is arranged in the outer casing 7, and two bearings 10 are installed in the bearing installation cavity 9, and a gap between the two bearings 10 A bearing spacer 11 is provided, the first main shaft 3 is mounted on two bearings 10, and a thrust retaining spring 22 is provided between the bearing 10 close to the outer cover 8 and the outer cover 8. Two ends of the bearing installation cavity 9 are respectively provided with an oil seal 12, a lubricating oil chamber 13 is formed between the outer casing 7 and the bearing spacer 11, and a lubricating oil filling port 14 communicating with the lubricating oil chamber 13 is provided on the outer casing, and the lubricating oil The filling port 14 is provided with a lubricating oil filling plug 15, which can effectively avoid the oil loss of the engine gearbox and protect the engine from damage.

The transition connection plate 1 has a hollow cavity, the second main shaft 4 protrudes from the cavity, the outer casing is installed on the transition connection plate 1 through fasteners, and the transition connection plate 1 is installed on the flywheel housing 16 of the engine through fasteners. In this embodiment, the fasteners involved are all bolts.

The flange bushing 2 is sheathed and installed on the other end of the first main shaft 3 through fasteners, and the flange bushing 2 is connected with the universal coupling 17 of the rear power take-off test bench of the engine through fasteners. The end of the first main shaft 3 close to the end of the flange bushing 2 is provided with a threaded hole 18, and the flange end surface of the flange bushing 2 is provided with a pressing block installation groove 19, and a bolt 20 is pressed in the pressing block installation groove 19. There is a pressing block 21, and the bolt 20 is installed in the threaded hole 18.

As shown in Figure 5, when the engine is replaced on the rear power take-off test bench of the engine, since the general-purpose rear power take-off only needs to replace the transition connection plate 1, the second main shaft 4 and the spline shaft spacer 6, these three parts The component structure is simple, the processing technology is simple, the production cost is low, the test preparation cost is greatly reduced, the test preparation cycle is shortened, and the utilization rate of the test bench is improved. This universal rear power take-off is suitable for all rear power take-off engine models; through Installing the universal rear power take-off can reliably transmit the torsional force of the rear power take-off output end 5 to the measuring system, thereby accurately measuring the output power of the rear power take-off. When replacing engines of different specifications, the assembly can be completed only by replacing the transition connection plate 1, the second main shaft 4 and the spline spacer in the rear power take-off of the general-purpose engine, which reduces the cost of tooling manufacturing, shortens the test preparation period, and improves Purpose of test bench utilization.

The utility model is not limited to the above-mentioned specific implementation manners, and various transformations made by those skilled in the art starting from the above-mentioned ideas without creative work all fall within the protection scope of the utility model.

Claims (4)

1. The test engine rear power take-off is characterized in that it includes Outer sleeve, the first main shaft is installed in rotation in the outer sleeve, one end of the first main shaft is connected with the second main shaft through a spline, and the other end of the second main shaft is provided with the rear power output end of the engine. An external spline that is compatible with the spline, a spline shaft spacer is set on the second main shaft, and the spline shaft spacer is against the end surface of the internal spline of the rear power output end of the engine; A transition connection plate, the transition connection plate has a hollow cavity, the second main shaft protrudes from the cavity, the jacket is installed on the transition connection plate through fasteners, and the transition connection plate is tightened the firmware is mounted on the flywheel housing of the engine; A flange bushing, the flange bushing is sheathed and installed on the other end of the first main shaft through a fastener, and the flange bushing is connected to the rear power take-off test bench of the engine through a fastener. Connect to the coupling. 2. The test engine rear power take-off as claimed in claim 1, wherein the outer casing includes an outer casing and an outer casing end cover installed together by fasteners, and the outer casing is provided with a bearing installation cavity , two bearings are installed in the bearing installation cavity, a bearing spacer is arranged between the two bearings, and the first main shaft is installed on the two bearings. 3. The test engine rear power take-off as claimed in claim 2, wherein the two ends of the bearing mounting cavity are respectively provided with an oil seal, and a lubricating oil cavity is formed between the outer casing and the bearing spacer. The outer casing is provided with a lubricating oil filling port communicating with the lubricating oil cavity, and a lubricating oil filling plug is provided in the lubricating oil filling port. 4. The test engine rear power take-off as claimed in claim 1, wherein the end of the first main shaft close to one end of the flange bushing is provided with a threaded hole, and the flange bushing is provided with a threaded hole. A pressing block installation groove is provided on the end surface of the flange, and a pressing block is arranged in the pressing block installation groove through a bolt, and the bolt is installed in the threaded hole.