CN212363648U - Testing device for axial force loading of crankshaft - Google Patents

Abstract

The utility model discloses a loaded testing arrangement of bent axle axial force, include: the test bracket is arranged on one side of the belt pulley of the engine to be tested; the loading bracket is arranged on the test bracket; the loading bolt is arranged on the loading bracket; the two bracket assemblies are arranged on the test bracket at a certain distance and positioned between the loading bracket and the belt pulley, and each bracket assembly is provided with a sensor assembling hole; two ends of the pressure sensor are arranged in the sensor assembling holes in a penetrating way, and two ends of the pressure sensor are provided with screw holes; one end of the force transmission bolt is screwed in the screw hole at one end of the pressure sensor, and the other end of the force transmission bolt is abutted to the loading bolt; a thrust bearing is arranged in a bearing hole at one end of the test fixing part, and a stud at the other end is screwed in a screw hole at the other end of the pressure sensor; the thrust bearing is connected to the one end of test connection rotating part, and the belt pulley is connected to the other end, and the test connection rotating part can rotate along with the belt pulley. Therefore, the loading test can be carried out without disconnecting the dynamometer.

Description

Testing device for axial force loading of crankshaft

Technical Field

The utility model relates to an engine field especially is about a loaded testing arrangement of bent axle axial force.

Background

In a diesel engine development test, the influence of the crankshaft on the performance of an engine and related parts when the crankshaft is loaded by an axial force needs to be known, so that corresponding improvement measures are taken, the performance of the engine is better, and the reliability of the related parts is better.

The testing device for axial force loading of the crankshaft in the prior art mostly applies axial force loading to the flywheel end, the flywheel end is a power output end, the flywheel and the dynamometer are necessarily disconnected when the axial force loading is applied by the scheme, and the performance of the engine cannot be tested when the axial loading is applied.

The prior art testing device for axial force loading of the crankshaft has the following defects: the axial force loading applied from the flywheel end can only know the abrasion influence on the thrust plate after the axial loading. The flywheel must be disconnected from the dynamometer and the performance of the engine cannot be tested while axial loading is applied.

The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a loaded testing arrangement of bent axle axial force, it is given bent axle loading axial force from belt pulley one end, can be to carrying out the loading test in the condition of not breaking the dynamometer machine.

In order to achieve the above object, the utility model provides a loaded testing arrangement of bent axle axial force, including test support, loading bolt, biography power bolt, two bracket components, pressure sensor, test fixed part and test connection rotating part. The test bracket is arranged on one side of the belt pulley of the engine to be tested; the loading bracket is arranged on the test bracket; the loading bolt is arranged on the loading bracket; the two bracket assemblies are arranged on the test bracket at a certain distance and positioned between the loading bracket and the belt pulley, and each bracket assembly is provided with a sensor assembling hole; two ends of the pressure sensor are arranged in the sensor assembling holes in a penetrating way, and two ends of the pressure sensor are provided with screw holes; one end of the force transmission bolt is screwed in the screw hole at one end of the pressure sensor, and the other end of the force transmission bolt is abutted to the loading bolt; a thrust bearing is arranged in a bearing hole at one end of the test fixing part, and a stud at the other end is screwed in a screw hole at the other end of the pressure sensor; the thrust bearing is connected to the one end of test connection rotating part, and the belt pulley is connected to the other end, and the test connection rotating part can rotate along with the belt pulley.

In a preferred embodiment, the test rack comprises a first bottom plate, a first top plate, two first vertical plates and four first rib plates. A bracket fixing hole is formed in the first bottom plate; the first top plate is parallel to the first bottom plate and is separated from the first bottom plate by a certain distance, a first support mounting hole and a plurality of second support mounting holes are formed in the first top plate, the first support mounting hole is formed in one end of the longitudinal center line of the first top plate, and the plurality of second support mounting holes are symmetrically distributed in two sides of the other end of the longitudinal center line of the first top plate; the two first vertical plates are parallel to each other and are arranged between the first bottom plate and the first top plate at intervals, and the two first vertical plates are perpendicular to the short sides of the first bottom plate and the first top plate; the four first rib plates are arranged on the outer sides of two ends of the two first vertical plates in a pairwise parallel manner; wherein the loading bracket is arranged on the first bracket mounting hole, and the two bracket components are arranged on the plurality of second bracket mounting holes.

In a preferred embodiment, the loading bracket comprises a second bottom plate, a second vertical plate and two second rib plates. The second bottom plate is provided with a first mounting hole which is used for being connected with the first bracket mounting hole through a bolt; the second vertical plate and the second bottom plate are vertically arranged at one end of the second bottom plate, and the second vertical plate is provided with a loading bolt hole for installing a loading bolt; the two second rib plates are arranged along the edges of the second bottom plate and the second vertical plate.

In a preferred embodiment, the bracket assembly includes a sensor bracket and a sensor fixing plate. The third bottom plate of the sensor bracket comprises a second mounting hole which is used for being connected with the plurality of second bracket mounting holes through bolts; the third vertical plate is vertically connected with the third bottom plate, and the third vertical plate is provided with an abdicating arc and a plurality of first assembling holes; the sensor fixing plate comprises a plurality of second assembling holes which are arranged at two sides below the sensor assembling holes and are used for being connected with the first assembling holes through bolts; and the locking screw hole is arranged at the top of the sensor fixing plate, is intersected and vertical with the sensor assembling hole and is used for installing a locking screw to prevent the pressure sensor from rotating.

In a preferred embodiment, the nut of the force-transmitting bolt is provided with a force-transmitting counter bore, and the loading bolt abuts against the force-transmitting counter bore.

In a preferred embodiment, the test connection rotating portion includes a journal and a flange. The shaft neck is arranged at one end of the test connection rotating part and is used for connecting the thrust bearing; the flange sets up the other end at the test connection rotating part, is provided with a plurality of connecting holes on the flange, and a plurality of connecting holes are used for passing through bolt and belt pulley connection.

In a preferred embodiment, the testing device for axial force loading of the crankshaft further comprises a testing bench, and the engine to be tested and the testing support are both arranged on the testing bench.

In a preferred embodiment, the testing device for the axial force loading of the crankshaft further comprises a first locking nut, a second locking nut and a third locking nut, wherein the first locking nut is arranged on the loading bolt and used for locking the loading bolt with the loading bolt hole; the second locking nut is arranged on the force transmission bolt and used for locking the force transmission bolt and a screw hole at one end of the pressure sensor; and the third locking nut is arranged on the stud of the test fixing part and used for locking the stud and the screw hole at the other end of the pressure sensor.

Compared with the prior art, the utility model discloses a loaded testing arrangement of bent axle axial force has following beneficial effect: because the axial load is applied to the crankshaft from the belt pulley section through a series of supports and pressure sensors, the flywheel and the dynamometer are not required to be disconnected, the axial force can be applied to the crankshaft, and the influence of the crankshaft on the performance of the engine when the crankshaft is loaded by the axial force is detected in real time. And the testing device has simple structure and does not have complicated structures such as a pull rope, a guide wheel and the like.

Drawings

Fig. 1 is a schematic front view of a test apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of the operation of a testing device according to an embodiment of the present invention;

fig. 3 is a schematic front view of a test rack according to an embodiment of the present invention;

FIG. 4 is a schematic side view of a test rack according to an embodiment of the present invention;

fig. 5 is a schematic top view of a test rack according to an embodiment of the present invention;

FIG. 6 is a schematic cross-sectional view taken at A-A of FIG. 3;

fig. 7 is a schematic front view of a loading stand according to an embodiment of the present invention;

fig. 8 is a side view schematic of a loading stand according to an embodiment of the present invention;

fig. 9 is a schematic top view of a loading stand according to an embodiment of the present invention;

fig. 10 is a schematic front view of a force transfer bolt according to an embodiment of the invention;

FIG. 11 is a schematic cross-sectional view taken at B-B of FIG. 10;

fig. 12 is a schematic front view of a sensor holder according to an embodiment of the present invention;

fig. 13 is a schematic top view of a sensor holder according to an embodiment of the invention;

fig. 14 is a front view of a sensor mounting plate according to an embodiment of the present invention;

fig. 15 is a schematic top view of a sensor mounting plate according to an embodiment of the present invention;

fig. 16 is a front view schematically illustrating a test fixture according to an embodiment of the present invention;

FIG. 17 is a schematic cross-sectional view at C-C of FIG. 16;

FIG. 18 is a schematic front view of a test connection rotation section according to an embodiment of the present invention;

fig. 19 is a schematic sectional view at D-D of fig. 18.

Description of the main reference numerals:

1-a test support, 101-a first bottom plate, 1011-a support fixing hole, 102-a first top plate, 1021-a first support mounting hole, 1022-a second support mounting hole, 103-a first vertical plate, 104-a first rib plate, 2-a loading support, 201-a second bottom plate, 2011-a first mounting hole, 202-a second vertical plate, 2021-a loading bolt hole, 203-a second rib plate, 3-a loading bolt, 4-a first locking nut, 5-a force transmission bolt, 501-a force transmission counter bore, 6-a second locking nut, 7-a support assembly, 701-a third bottom plate, 7011-a second mounting hole, 702-a third vertical plate, 7021-a first assembling hole, 7022-an abdicating arc, 703-a sensor fixing plate, 7031-a sensor assembling hole, 7032-second assembly hole, 7033-locking screw hole, 8-pressure sensor. 9-third locking nut, 10-test fixing part, 1001-bearing hole, 1002-stud, 11-test connection rotating part, 1101-connection hole, 1102-journal, 12-engine to be tested, 1201-belt pulley and 13-test bench.

Detailed Description

The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited by the following detailed description.

Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.

As shown in fig. 1 to 2, the testing device for crankshaft axial force loading according to the preferred embodiment of the present invention includes a loading bracket 2, a loading bolt 3, a first locking nut 4, a force transferring bolt 5, a second locking nut 6, two bracket assemblies 7, a pressure sensor 8, a third locking nut 9, a testing fixing portion 10, a thrust bearing (not shown) and a testing connecting rotating portion 11 sequentially installed on a testing bracket 1.

As shown in fig. 3 to 6, in some embodiments, the engine under test 12 and the test rack 1 are both disposed on the test bed 13, and the test rack 1 is located on the pulley 1201 side of the engine under test 12. The test support 1 comprises a first bottom plate 101, a first top plate 102, two first vertical plates 103 and four first rib plates 104. The first base plate 101 is provided with a bracket fixing hole 1011. The first top plate 102 is parallel to and spaced apart from the first bottom plate 101 by a distance, the first top plate 102 is provided with a first bracket mounting hole 1021 and a plurality of second bracket mounting holes 1022, the first bracket mounting hole 1021 is arranged at one end of a longitudinal center line of the first top plate 102, and the plurality of second bracket mounting holes 1022 are symmetrically distributed at two sides of the other end of the longitudinal center line of the first top plate 102. The two first vertical plates 103 are parallel to each other and are arranged between the first bottom plate 101 and the first top plate 102 at a certain distance, and the two first vertical plates 103 are perpendicular to the short sides of the first bottom plate 101 and the first top plate 102. The four first rib plates 104 are arranged on the outer sides of the two ends of the two first vertical plates 103 in a pairwise parallel manner. Wherein the loading bracket 2 is disposed on the first bracket mounting hole 1021 and the two bracket assemblies 7 are disposed on the plurality of second bracket mounting holes 1022. In the present embodiment, the test rack 1 is welded by steel plates into an approximately square box structure. The bracket fixing hole 1011, the first bracket mounting hole 1021 and the second bracket mounting hole 1022 are all in the form of long holes, so that the position adjustment and the positioning accuracy during the bracket mounting are facilitated. Lightening holes are arranged on the first vertical plate 103 and the first rib plate 104, so that the weight of the test support 1 is lightened and materials are saved.

As shown in fig. 7 to 9, in some embodiments, the loading rack 2 is provided on the test rack 1. The loading bracket 2 comprises a second bottom plate 201, a second vertical plate 202 and two second rib plates 203. The second bottom plate 201 is provided with a first mounting hole 2011, and the first mounting hole 2011 is used for connecting with the first bracket mounting hole 1021 through a bolt. The second upright plate 202 is disposed at one end of the second base plate 201 perpendicular to the second base plate 201, and the second upright plate 202 is disposed with a loading bolt hole 2021, where the loading bolt hole 2021 is used to mount a loading bolt 3. Two second rib plates 203 are arranged along the edges of the second bottom plate 201 and the second vertical plate 202 to reinforce the strength and rigidity of the loading bracket 2.

Referring to fig. 1 and 2, in some embodiments, a loading bolt 3 is disposed on the loading bracket 2, a first locking nut 4 is disposed on the loading bolt 3, and the first locking nut 4 is used to lock the loading bolt 3 with a loading bolt hole 2021.

As shown in fig. 12 to 15, referring to fig. 1 and 2, in some embodiments, two rack assemblies 7 are disposed on the test rack 1 at a distance from each other and between the loading rack 2 and the pulley 1201. The bracket assembly 7 includes a sensor bracket and a sensor fixing plate 703. The third base plate 701 of the sensor bracket includes a second mounting hole 7011, and the second mounting hole 7011 is configured to be coupled to a plurality of second bracket mounting holes 1022 through bolts. And the third vertical plate 702 is vertically connected with the third bottom plate 701, and the third vertical plate 702 is provided with a plurality of first assembling holes 7021 and abdicating arcs 7022. The first plurality of assembly holes 7021 are configured to be coupled to the second plurality of rack mounting holes 1022 on the test rack 1 by bolts. The sensor mounting hole 7031 is provided in the middle of the upper portion of the sensor fixing plate 703, and the sensor fixing plate 703 includes a plurality of second mounting holes 7032 provided at both sides below the sensor mounting hole 7031, the plurality of second mounting holes 7032 being configured to be connected to the plurality of first mounting holes 7021 by bolts. And a locking screw hole 7033 arranged at the top of the sensor fixing plate 703, wherein the locking screw hole 7033 is intersected and vertical with the sensor assembling hole 7031, and the locking screw hole 7033 is used for installing a locking screw to prevent the pressure sensor 8 from rotating.

Referring to fig. 1 and 2, in some embodiments, a pressure sensor 8 is disposed between two bracket assemblies 7. Both ends of the pressure sensor 8 are inserted into the sensor mounting holes 7031 of the two sensor fixing plates 703, and both ends of the pressure sensor 8 are provided with screw holes.

Referring to fig. 1 and 2, as shown in fig. 10 to 11, in some embodiments, one end of the force transmission bolt 5 is screwed into a screw hole at one end of the pressure sensor 8, a force transmission counter bore 501 is formed in a nut at the other end of the force transmission bolt 5, and the loading bolt 3 abuts against the force transmission counter bore 501. The second locking nut 6 is arranged on the force transmission bolt 5 and used for locking the force transmission bolt 5 and a screw hole at one end of the pressure sensor 8.

Referring to fig. 1 and 2, as shown in fig. 16 to 17, in some embodiments, a thrust bearing (not shown) is installed in a bearing hole 1001 at one end of the test fixing portion 10, and a stud 1002 at the other end is screwed into a screw hole at the other end of the pressure sensor 8. The third locking nut 9 is provided on the stud 1002 of the test fixture 10 to lock the stud 1002 and the screw hole at the other end of the pressure sensor 8.

In some embodiments, the end faces of the screw holes at both ends of the pressure sensor 8 should slightly extend out of the sensor mounting holes 7031 on the two sensor fixing plates 703, so that the second locking nut 6 and the third locking nut 9 lock the studs 1002 of the force transmission bolt 5 and the test fixture 10 with the end faces of the screw holes at both ends of the pressure sensor 8. That is, the second locking nut 6 and the third locking nut 9 are theoretically not in contact with the sensor fixing plate 703, and thus do not affect the transmission of the axial loading force. The abdicating circular arc 7022 on the third vertical plate 702 of the sensor bracket is used for abdicating the middle part of the pressure transmitter.

Referring to fig. 1 and 2, as shown in fig. 18 to 19, in some embodiments, the test connection rotation part 11 includes a journal 1102 and a flange. A journal 1102 is provided at one end of the test connection rotation part 11, and the journal 1102 is used to connect a thrust bearing. A flange is provided at the other end of the test connection rotating portion 11, and a plurality of connection holes 1101 are provided on the flange, and the plurality of connection holes 1101 are configured to be connected to the pulley 1201 by bolts.

In some embodiments, the present invention provides a method for testing axial force loading of a crankshaft as follows: firstly, a test bracket 1 is arranged at one end of a belt pulley 1201 of a test bench 13 of an engine 12 to be tested; the fastening bolts of the crankshaft pulley 1201 are removed, and the flange at the end of the test connection rotating portion 11 is fixed to the crankshaft together with the pulley 1201 by bolts. An inner ring of a thrust bearing is arranged on the shaft diameter of the other end of the test connection rotating part 11; an outer ring of the thrust bearing is mounted in a bearing hole 1001 of the test fixing portion 10; mounting the two bracket assemblies 7 on the second mounting holes 7011 of the test bracket 1; the sensor assembling holes 7031 of the two sensor fixing plates 703 are respectively sleeved on the two ends of the pressure sensor 8, and the force transmission bolt 5 and the stud 1002 of the test fixing part 10 are respectively locked with the end faces of screw holes at the two ends of the pressure sensor 8 by using a second locking nut 6 and a third locking nut 9; a fastening nut (third locking nut 9) is screwed on the stud 1002 of the test fixture 10 in advance, and then the stud 1002 is screwed into the screw hole at the end of the pressure sensor 8; a nut for fastening (a second locking nut 6) is pre-screwed on the force transmission bolt 5, and then the force transmission bolt 5 is screwed into a screw hole at the end of the pressure sensor 8; then as a whole, the two sensor fixing plates 703 are respectively fixed on the two sensor brackets through bolts; fixing the loading bracket 2 on a first bracket mounting hole 1021 on the test bracket 1, screwing a loading bolt 3 into a loading bolt hole 2021 of the loading bracket 2, then screwing a locking nut (a first locking nut 4), and enabling the tail part of the bolt to enter a force transmission counter bore 501 on a nut of a force transmission bolt 5; after the position is adjusted, a second locking nut 6 and a third locking nut 9 at two ends of the pressure sensor 8 are locked; and starting the engine 12 to be tested, adjusting the loading bolt 3 and the first locking nut 4, observing the display pressure value on the pressure sensor 8, and simultaneously recording the working condition data of the dynamometer under the condition of the axial loading force. And adjusting the loading bolt 3 and the first locking nut 4 for multiple times to change the axial loading force data, and recording the working condition data change of the engine 12 to be tested displayed by the dynamometer under the condition of different axial loading forces.

To sum up, the utility model discloses a loaded testing arrangement of bent axle axial force has following advantage: because the axial load is applied to the crankshaft from the belt pulley section through a series of supports and pressure sensors, the flywheel and the dynamometer are not required to be disconnected, the axial force can be applied to the crankshaft, and the influence of the crankshaft on the performance of the engine when the crankshaft is loaded by the axial force is detected in real time. And the testing device has simple structure and does not have complicated structures such as a pull rope, a guide wheel and the like.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims (8)

1. A crankshaft axial force loading test device is characterized by comprising:

the test bracket is arranged on one side of the belt pulley of the engine to be tested;

a loading rack disposed on the test rack;

a loading bolt disposed on the loading bracket;

the two bracket assemblies are arranged on the test bracket at intervals and are positioned between the loading bracket and the belt pulley, and each bracket assembly is provided with a sensor assembling hole;

the two ends of the pressure sensor penetrate through the sensor assembling holes, and the two ends of the pressure sensor are provided with screw holes;

one end of the force transmission bolt is locked in the screw hole at one end of the pressure sensor in a rotating mode, and the other end of the force transmission bolt is abutted to the loading bolt;

the test fixing part is provided with a thrust bearing in a bearing hole at one end, and a stud at the other end is screwed in the screw hole at the other end of the pressure sensor; and

the test connection rotating part, its one end is connected thrust bearing, and the other end is connected the belt pulley, just the test connection rotating part can follow the belt pulley rotates.

2. The crankshaft axial force loading test apparatus of claim 1, wherein the test fixture comprises:

the first bottom plate is provided with a bracket fixing hole;

the first top plate is parallel to the first bottom plate and is separated from the first bottom plate by a certain distance, a first support mounting hole and a plurality of second support mounting holes are formed in the first top plate, the first support mounting hole is formed in one end of the longitudinal center line of the first top plate, and the plurality of second support mounting holes are symmetrically distributed in two sides of the other end of the longitudinal center line of the first top plate;

the two first vertical plates are parallel to each other and are arranged between the first bottom plate and the first top plate at intervals, and the two first vertical plates are perpendicular to the short sides of the first bottom plate and the first top plate at the same time;

the four first rib plates are arranged on the outer sides of the two ends of the two first vertical plates in a pairwise parallel manner;

wherein the loading bracket is disposed on the first bracket mounting hole and the two bracket assemblies are disposed on the plurality of second bracket mounting holes.

3. The crankshaft axial force loading test apparatus of claim 2, wherein the loading bracket comprises:

the second bottom plate is provided with a first mounting hole, and the first mounting hole is used for being connected with the first support mounting hole through a bolt;

the second vertical plate is arranged at one end of the second bottom plate and is perpendicular to the second bottom plate, and a loading bolt hole is formed in the second vertical plate and used for installing the loading bolt; and

and the two second rib plates are arranged along the edges of the second bottom plate and the second vertical plate.

4. The crankshaft axial force loading test apparatus of claim 2, wherein said carriage assembly comprises:

a sensor holder, comprising:

a third base plate including second mounting holes to be connected with the plurality of second bracket mounting holes by bolts; and

the third vertical plate is vertically connected with the third bottom plate, and a abdicating circular arc and a plurality of first assembling holes are formed in the third vertical plate; and

a sensor fixing plate, the sensor assembly hole being provided in the middle of the upper portion of the sensor fixing plate, the sensor fixing plate including:

a plurality of second assembly holes provided at both sides below the sensor assembly hole, the plurality of second assembly holes to be connected with the plurality of first assembly holes by bolts; and

and the locking screw hole is arranged at the top of the sensor fixing plate, the locking screw hole is intersected and vertical to the sensor assembling hole, and the locking screw hole is used for installing a locking screw to prevent the pressure sensor from rotating.

5. The crankshaft axial force loading test device of claim 2, wherein a force transmission counter bore is formed in a nut of the force transmission bolt, and the loading bolt abuts against the force transmission counter bore.

6. The crankshaft axial force loading test apparatus of claim 2, wherein said test connection rotation portion comprises:

a journal provided at one end of the test connection rotating part, the journal for connecting the thrust bearing; and

the flange, it sets up the other end of test connection rotating part, be provided with a plurality of connecting holes on the flange, a plurality of connecting holes be used for through the bolt with belt pulley connection.

7. The crankshaft axial force loading test apparatus of claim 3, further comprising a test rig on which the engine under test and the test fixture are both disposed.

8. The apparatus for testing axial force loading of a crankshaft as set forth in claim 7, further comprising a first locking nut, a second locking nut, and a third locking nut, said first locking nut being disposed on said loading bolt for locking said loading bolt with said loading bolt hole; the second locking nut is arranged on the force transmission bolt and used for locking the force transmission bolt and the screw hole at one end of the pressure sensor; the third locking nut is arranged on the stud of the test fixing part and used for locking the stud and the screw hole at the other end of the pressure sensor.

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