JPH11316174A - Testing device of cylinder block bearing part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To execute the strength and durability test of a cylinder block bearing part by fixing a support member for supporting a shaft arranged in the bearing part to be tested by a vibration exciting plate. SOLUTION: A support member for supporting a shaft 10 arranged in a bearing part 130 to be tested is fixed to a vibration exiting plate 201. Con'rods 20 are assembled to both sides of the shaft 10, and the base ends of both the con'rods 20 are fixed onto a lower plate 21. An upper plate 32 functions as a fixing member for fixing a cylinder block 100 to a vibration exciting plate 202. According to such an assembling, the cylinder block 100 and the shaft 10 are fixed to the vibration exciting plate 202 side and to the vibration exciting plate 201, respectively, and the load added between the vibration exciting plates 201, 202 is received by the bearing part 130. Thus, the strength and durability test of the bearing part 130 can be executed by vibrating the vibration exciting plates 201, 202 with prescribed amplitude and frequency.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylinder block bearing testing apparatus for performing a strength / durability test of a bearing in a cylinder block.

[0002]

2. Description of the Related Art A cylinder serving as a sliding space for a piston is formed in a cylinder block constituting an engine body. The reciprocating motion of the piston drives the crankshaft to rotate. A bearing for supporting the rotating crankshaft is also formed in the cylinder block. This bearing portion is configured by fixing a concave bearing cap, facing the concave portion protruding from the cylinder block main body.In a multi-cylinder engine, each partition portion that partitions adjacent cylinders and the crankshaft are formed. Such bearings are formed on both sides of the penetrating cylinder block.

[0003]

Since the piston and the crankshaft are connected via a connecting rod (connecting rod), a large gas force applied to the piston by combustion directly acts on the bearing of the crankshaft. In addition, it is necessary to ensure sufficient strength and durability for the bearing portion. To this end, it is desirable to carry out a test for confirming the strength and durability of the bearing portion, but conventionally, it has been mainly confirmed by an actual machine durability evaluation using an actually mounted engine.

Japanese Patent Application Laid-Open No. 5-288644 discloses a structure in which a vibrator is connected to a part of a test member. However, a test apparatus applicable to a strength / durability test on a bearing portion of a cylinder block is disclosed. Is not disclosed at all.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide a testing device for a cylinder block bearing which can perform a strength / durability test of a bearing in a cylinder block.

[0006]

SUMMARY OF THE INVENTION Accordingly, a testing apparatus for a cylinder block bearing according to the present invention comprises a cylinder block fixed between a pair of vibrating plates, and a cylinder block bearing test for testing the cylinder block bearing. An apparatus, wherein a shaft member disposed on a predetermined bearing portion to be tested, a pair of support members supporting both sides of the shaft member, and a pair of support members for fixing the pair of support members to one of the vibration plates. It comprises one fixing member and a second fixing member for fixing the cylinder block to the other vibration plate.

[0007] With this configuration, the test shaft member arranged in the bearing portion is fixed to one of the vibration plates via the first fixing member, and the cylinder block side is connected to the other through the second fixing member. Fixed to the excitation plate. This allows
By vibrating both vibrating plates, the cylinder block and the shaft member relatively vibrate.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described.
This will be described with reference to the accompanying drawings.

FIGS. 1 and 2 show a main part of a test apparatus for a cylinder block bearing (hereinafter, referred to as a bearing) according to the present embodiment. This test apparatus has a structure in which both sides of a shaft 10 are supported by connecting rods 20.

The shaft 10 has a columnar shape, a journal portion 11 is formed at the center, and support portions 12 are formed on both sides thereof.
The outer diameters of the support portions 12 on both sides of the journal portion 11 are smaller than the outer diameter of the journal portion 11. The connecting rod 20 is fixed to the support portion 12.

The connecting rod 20 has a rod portion 21 having a semicircular concave portion to be fitted to the support portion 12 of the shaft 10.
And a cap portion 22 having a semicircular concave portion to be fitted to the support portion 12 of the shaft 10, and the support portion 12 is sandwiched between the concave portions from both sides. Further, a bolt hole 22a penetrates on both sides of the concave portion of the cap portion 22, and a bolt hole 21a reaching the inside of the rod portion 21 is formed on the rod portion 21 at a position corresponding to the penetrated bolt hole 22a. ing. Then, the bolt 51 is screwed into the communicating bolt holes 21a and 22a, so that the rod part 21 and the cap part 22 constituting the connecting rod 20 are fastened.

As described above, the pair of connecting rods 20 supporting the shaft 10 from both sides is formed by a flat lower plate 31.
Fixed against. That is, the T-shaped base end of the rod portion 21 is penetrated by bolt holes 21b on both sides opposite to the center portion, and is located below the position corresponding to the penetrated bolt hole 21b. Plate 3
A bolt hole 31a reaching the inside of the lower plate 31 is also formed on one side. Then, the communicating bolt holes 21b, 31
b by screwing the bolt 52 into the pair of connecting rods 2.
0 is fixed to the lower plate 31.

FIG. 3 shows an example of a cylinder block to be subjected to a strength / durability test.

The cylinder block 100 includes a block body 110 and a crank cap 120.

In the block body 110, cylinders 111 each having a space in which a piston (not shown) reciprocates are formed in two rows along the axial direction of the crankshaft 101 shown by a dashed line (see FIG. 4). Crankshaft 1
Cylinders 111 in each row are arranged in a V-shape around 01,
It has a so-called V-type engine structure.

In the lower part of the block body 110 in FIG. 3, a semicircular concave portion is formed, and this concave portion is one bearing portion 130 for supporting the crankshaft 101. The semicircular bearings 130 on the block body 110 side are formed on each of the partition walls that partition adjacent cylinders 111 and on both sides of the block body 110 through which the crankshaft 101 passes.

On the other hand, the crank cap 120 is
Each of the bearings 130 of the block body 110 is fixed to one of the bearings 130. A semicircular recess is formed in the center of the block 130, and the recess is formed in the crankshaft 101.
The other bearing part 130 that supports. Each crank cap 120 has a bolt hole 122
Are formed so as to penetrate two by two, and a bolt hole 112 reaching the inside of the block main body 110 is formed at a position corresponding to each bolt hole on the block main body 110 side. Then, the bolt 141 is screwed into the communicating bolt holes 112 and 122 to fasten the crank cap 120 to the block body 110, and thus an annular bearing portion for supporting the crankshaft 101. 130 are formed.

FIGS. 4 and 5 show a state in which the bearing block test device is assembled to the cylinder block 100 having such a structure. In FIG. 4, illustration of the crank cap 120 is omitted for convenience.

In this assembly, first, the bearing 130 on the block body 110 side and the crank cap 12
The journal 10 of the test shaft 10 is sandwiched between the bearings 130 of the cylinder block 100 and the bearing 10 of the cylinder block 100 to be tested.

Next, the support portion 12 at one end of the shaft 10
Is sandwiched between the concave portion of the rod portion 21 and the concave portion of the cap portion 22, and this portion is fastened with a bolt 51. Similarly, the support portion 12 at the other end is sandwiched between the concave portion of the rod portion 21 and the concave portion of the cap portion 22, and this portion is fastened with a bolt 51. In this manner, the connecting rods 20 are assembled on both sides of the shaft 10.

Next, the base ends of both connecting rods 20 are fixed on the lower plate 31 by bolts 52. The lower plate 31 functions as a fixing member for fixing the connecting rod 20 to one of the vibrating plates 201 in the vibrator. Bolt holes are formed in the lower plate 31 at positions corresponding to the bolt holes formed in the vibration plate 201, and the bolts 53 are screwed into the bolt holes communicating the lower plate 31 and the vibration plate 201. Then, the lower plate 31
Is fixed to the excitation plate 201. Thus, the test shaft 10 is assembled on the vibration plate 201 side.

The upper plate 32 shown in FIG. 4 is also a component of the bearing testing device, and serves as a fixing member for fixing the cylinder block 100 to the vibrating plate 202 of the vibrator. It is functioning. Normally, a cylinder head is fixed on the upper deck 113 by a head bolt.
A number of head bolt holes 114 are formed on 13. Bolt holes are formed in the upper plate 32 at positions corresponding to the head bolt holes 114.
By screwing the bolt 54 into the head bolt hole 114 on the upper deck 113 via the second bolt hole, the upper plate 32 is fixed to the block main body 110.
Further, a bolt hole communicating with each other is formed in the upper plate 32 and the vibration plate 202. By screwing a bolt 55 into the bolt hole, the upper plate 32
Fixed against. Thereby, the cylinder block 1
00 is assembled on the vibration plate 202 side.

By assembling as described above, the cylinder block 100 is fixed to the vibration plate 202 side, and the test shaft 10 is fixed to the vibration plate 201 side. The applied load is received by the joint between the cylinder block 100 and the shaft 10, that is, the bearing 130. Therefore, in this state, by vibrating the vibrating plates 201 and 202 at a predetermined amplitude and a predetermined frequency, a strength / durability test of the bearing unit 130 can be performed.

At this time, as shown in FIG. 6, for example, as shown in FIG. 6, the shape of the shaft 10 is a columnar shape having two flat surfaces on opposite sides along the axial direction.
It is also possible to carry out the test so that a load is applied only to a predetermined portion of the test. In addition, the upper plate 32 and the lower plate 3
For example, as shown in FIG. 7, as the shape of the upper plate 32, the thickness of the upper plate 32 can be changed to a tapered shape, and the fixing surface of the cylinder block 100 can be inclined at a predetermined angle. The direction of the load applied to the bearing unit 130 can be changed. In this way,
By appropriately selecting the shapes of the cylinder 10, the upper plate 32, and the lower plate 31, it is possible to adjust a portion of the bearing portion 130 to which a load is applied and a load direction with respect to the bearing portion 130, and perform various tests. .

Although the procedure for assembling the test apparatus has been illustrated as an embodiment, the present invention is not limited to the illustrated procedure, and can be assembled in a desired order.

[0026]

As described above, according to the cylinder block bearing testing apparatus according to the present invention, a pair of support members for fixing the shaft member disposed on the cylinder block bearing to one of the vibration plates is provided. A second fixing means for fixing the cylinder block to the other vibration plate while providing a first fixing member;
Since the fixed member is provided, after assembling this test device to the cylinder block, by vibrating both vibrating plates, the cylinder block and the shaft member relatively vibrate, and a predetermined load is applied to the cylinder block bearing portion. This makes it possible to carry out a strength / durability test of the cylinder block bearing. Also, by appropriately selecting the shape of the shaft member and the first and second fixing members, the direction and location of the load applied to the cylinder block bearing can be changed. It is possible to carry out tests according to the actual conditions of the vehicle-mounted engine.

[Brief description of the drawings]

FIG. 1 is a side view showing a cylinder block bearing testing device according to an embodiment.

FIG. 2 is an exploded view of the test apparatus of FIG. 1 as viewed from the front.

FIG. 3 is a front view showing a block main body and a crank cap constituting a cylinder block.

FIG. 4 is a side view showing a state where the test apparatus is assembled to a cylinder block. The illustration of the crank cap is omitted.

FIG. 5 is a front view showing a state where the test apparatus is assembled to a cylinder block.

FIG. 6 is an exploded view of a test apparatus according to another embodiment as viewed from the front.

FIG. 7 is a front view showing a state where a test apparatus according to another embodiment is assembled to a cylinder block.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... shaft (shaft member), 20 ... connecting rod (support member), 21 ... rod part, 22 ... cap part, 3
DESCRIPTION OF SYMBOLS 1 ... Lower plate (1st fixing member), 32 ... Upper plate (2nd fixing member), 100 ... Cylinder block, 110
… Block body, 120… Crank cap.

Claims (1)

[Claims] An apparatus for testing a cylinder block bearing, wherein the cylinder block is fixed between a pair of vibrating plates and a cylinder block bearing is tested, wherein the shaft member is disposed on a predetermined bearing to be tested. A pair of support members for supporting both sides of the shaft member; a first fixing member for fixing the pair of support members to one of the vibrating plates; and a cylinder for the other of the vibrating plates. A cylinder block bearing testing device comprising: a second fixing member for fixing a block.