Reduction gear life test bench considering impact load

Abstract

The application relates to a reducer life test bench considering impact load, characterized in that a support is fixed to the upper end of a base, a mounting hole is arranged on the front vertical plate of the support, the mounting hole is positioned and matched with the outer shell of the output end of a measured reducer, the front end of a flange is positioned and matched with the rear end of the measured reducer, the flange and the measured reducer are fixed to the support through screws, the output end of a motor is positioned and matched with the rear end of the flange and is fixedly connected through screws, the rear end of a load disc is positioned and matched with the front end of the output disc of the measured reducer and is fixedly connected through screws, the front end center light shaft of the disc body is rotationally connected with one end of a swing arm, and a counterweight disc is connected to the other end of the swing arm; a plurality of pairs of screw holes are symmetrically arranged on the two sides of the center light shaft of the disc body; a force applying column and a force receiving column are connected with one pair of screw holes; the force applying column is in contact and cooperation with the force applying column during the process that the swing arm rotates from a low point to a high point; and the swing arm is in impact contact with the force receiving column when the swing arm rotates to the low point position. The application can better reflect the actual service life of the reducer.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of fatigue life of a reducer, and particularly relates to a reducer life test bench considering impact load. BACKGROUND

[0002] The fatigue life of a reducer is one of key indexes for measuring the performance of the reducer, and the life test by a load bench is a conventional test means. In actual use of the reducer, the load is unstable and often accompanied by abnormal conditions such as impact and vibration. However, the conventional load bench cannot be consistent with the actual working conditions due to the constant load, and often leads to that the test life cannot well reflect the actual service life of the reducer. SUMMARY

[0003] The application aims at overcoming the deficiencies of the prior art, and provides a reducer life test bench considering impact load, which is convenient for structure detection and test, can adjust the impact load size, and meets the test requirements of different working conditions.

[0004] The above object of the application is achieved by the following technical scheme.

[0005] The reducer life test bench considering impact load comprises a base, a support, a motor, a flange, a measured reducer, a load disc, a swing arm, a force applying column, a force receiving column and a counterweight disc.

[0006] The support is fixed to the upper end of the base, and a mounting hole is arranged on the front side stand plate of the support. The output end shell of the measured reducer is in positioning cooperation with the mounting hole on the support. The front end of the flange is in positioning cooperation with the rear end of the measured reducer. The flange and the measured reducer are fixedly connected with the front side stand plate of the support through screws. The output end shell of the motor is in positioning cooperation with the rear end of the flange, and is fixedly connected with the flange through a screw.

[0007] The rear end of the load disc is in positioning cooperation with the front end of the output disc of the measured reducer, and is fixedly connected with the output disc through a screw. The front end center optical axis of the load disc is rotatably connected with one end of the swing arm through a bearing. The other end of the swing arm is a free end. The other end of the swing arm is connected with a detachable counterweight disc. A plurality of pairs of screw holes are symmetrically arranged on the disc body at both sides of the center optical axis. The distance between the plurality of pairs of screw holes and the center line of the load disc increases in sequence. The force applying column and the force receiving column are selectively connected with one pair of screw holes in a forward extending manner, so that the force applying column and the force receiving column are arranged at 180° at the front end of the load disc. The force applying column is in contact cooperation with the force applying column when the swing arm is pushed to rotate from the low point to the high point. The swing arm is in impact contact with the force receiving column when the swing arm is rotated to the low point position.

[0008] Moreover, the support is a welded metal piece, which is composed of a bottom plate, the front vertical plate arranged on the upper end of the bottom plate, and the two left and right reinforcing rib plates connecting the bottom plate and the front vertical plate.

[0009] Moreover, the flange is a hard aluminum alloy piece, which is provided with a rear interface at the rear end, which is matched with the shape of the output end shell part of the motor, and is provided with a front interface at the front end, which is matched with the shape of the input end shell part of the reducer to be tested, and is provided with an O-ring for sealing at the front interface.

[0010] Moreover, the load disc includes a disc body, which is provided with a positioning stop at the rear end center of the disc body, which can form a positioning cooperation with the output disc of the reducer, and is provided with the central optical axis at the front end center of the disc body, and is provided with the weight reduction holes on both sides of the threaded holes.

[0011] Moreover, the force applying column and the force receiving column adopt the same structure, which is composed of a metal main body and an outer rubber layer, and the rear end of the metal main body is provided with an external thread segment matched with the threaded hole on the load disc, and the outer rubber layer is fixed on the non-thread segment of the metal main body.

[0012] Moreover, one end of the swing arm is provided with an inner hole matched with the bearing, and the other side is provided with a threaded hole, and the counterweight disc is fixed on the other end of the swing arm through the central mounting screw of the counterweight disc and the threaded hole.

[0013] The present application has the advantages and positive effects that:

[0014] 1. The load assembly composed of the load disc, the swing arm, the force applying column, the force receiving column, the bearing and the counterweight disc is installed on the output disc end of the reducer to be tested, so that the periodic alternating load and the impact load of the reducer in the whole operation process are realized, the actual working condition is met, and the actual service life of the reducer can be better reflected through the test bed.

[0015] 2. The impact load size adjustment can be realized by installing the force applying column and the force receiving column in the different threaded holes from the center of the load disc, and the test personnel can meet the test requirements of different working conditions.

[0016] 3. The impact load size adjustment can be realized by changing the number of the counterweight discs, and the test personnel can meet the test requirements of different working conditions.

[0017] 4. The rubber layer wrapped outside the force applying column and the force receiving column can provide good buffering and protection effects.

[0018] In summary, the actual working condition of the reducer can be better reflected by reasonably setting the test conditions, and the test requirements of the complex working conditions of the reducer can be met. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 is a sectional view of the present application;

[0020] Fig. 2 is a perspective view of the present application. DETAILED DESCRIPTION

[0021] The structure of the present application is further described below in connection with the accompanying drawings and by way of examples. It should be noted that the examples are descriptive rather than limiting.

[0022] A reducer life test bench considering impact load, please see Figs. 1-2 The invention point is: including base 1, support 2, motor 3, flange 4, measured reducer 5, load disc 6, swing arm 8, force column 12, force column 7, bearing 9, counterweight disc 10. The load disc, swing arm, force column, force column, bearing and counterweight disc constitute a load assembly.

[0023] The base is a metal casting, fixed to the ground by bolts, providing support for the entire test bench, and the upper end is a support table.

[0024] The support is a welded metal part, used to install and support the flange, motor, measured reducer and load assembly. It is mainly composed of a bottom plate, a front side plate arranged at the upper end of the bottom plate, and two left and right reinforcing rib plates connecting the bottom plate and the front side plate. There are mounting holes on the side plate for matching with the external interface of the reducer output end, and threaded holes are arranged around the mounting holes on the side plate for fixing and installing the measured reducer and flange.

[0025] The flange is a hard aluminum alloy part, with a rear interface at the rear end matching the shape of the output end shell part of the motor, and a front interface at the front end matching the shape of the input end shell part of the measured reducer, and an O-ring is installed at the front interface to ensure sealing. There are screw mounting holes on the flange around the rear interface corresponding to the screw through holes on the measured reducer.

[0026] The load disc is a machined metal member, comprising a disc body, a positioning stopper is arranged at the center of the rear end of the disc body and can form a positioning fit with the output disc of the speed reducer, and screw passing holes are arranged on the load disc in the circumferential direction and correspond to the threaded holes on the output disc of the speed reducer one by one. A central optical axis is arranged at the center of the front end of the disc body and extends outward, used for installing a bearing and realizing the rotational connection with one end of the swing arm. A plurality of pairs of threaded holes are symmetrically arranged on the disc body on both sides of the central optical axis, the distance between the threaded holes and the center line of the load disc increases in sequence, used for realizing the relative installation of the force applying column and the force bearing column, and the impact load size is adjusted by adjusting the installation distance between the force applying column and the force bearing column and the center line of the load disc. In addition, weight reduction holes are symmetrically arranged on the disc body on both sides of the threaded holes, realizing the weight reduction treatment of the disc body.

[0027] The force applying column and the force bearing column adopt the same structural form and are both composed of a metal body and an outer rubber layer, the rear end of the metal body is provided with an outer threaded segment matched with the threaded holes on the load disc, and the outer rubber layer is fixed to the non-threaded segment of the metal body. The force applying column and the force bearing column adopt the above structural form, which can provide good buffering and protection effects.

[0028] The swing arm is a cuboid metal processing member, one end of the swing arm is processed with an inner hole matched with the bearing, and the other side is processed with a threaded hole, used for installing the counterweight disc.

[0029] The support is arranged on the support table of the base and is fixedly connected with the base through bolts. The support forms a positioning fit with the external interface of the output end of the to-be-tested speed reducer through the mounting hole; the flange forms a positioning fit with the input end shell of the to-be-tested speed reducer through the front interface, and the flange and the to-be-tested speed reducer are fixedly connected with the support through a plurality of screws 11 arranged along the circumference. The flange forms a positioning fit with the output end shell of the motor through the rear interface, and the motor is fixed to the rear end of the flange through the screws.

[0030] The load disc forms a positioning fit with the output disc of the to-be-tested speed reducer through the positioning stopper, and the two are fixedly connected through screws. The swing arm forms a relatively rotatable connection with the central optical axis on the load disc through the bearing arranged at the end of the swing arm. The swing arm and the load disc and the bearing are axially positioned through the retaining ring arranged on the central optical axis during installation. The counterweight disc is fixed to the end of the swing arm provided with the threaded hole through the screws.

[0031] The force applying column and the force bearing column are installed in a pair of threaded holes on the load disc in a selectable manner through the outer threaded segments. The force applying column is used to push the swing arm to rotate from the low point to the high point position during the operation of the to-be-tested speed reducer. The force bearing column is used to bear the impact of the swing arm when the swing arm rotates from the high point to the low point position under the action of the weight, and the impact force is transmitted to the speed reducer through the load disc to build the load working condition of the impact load.

[0032] The test method for the fatigue life of the reducer by using the reducer life test bench considering impact load is as follows:

[0033] 1. installing the reducer to be tested on the test bench;

[0034] 2. adjusting the impact load size by adjusting the positions of the force applying column and the force receiving column from the center of the load disc and the weight of the counterweight disc according to the actual application conditions of the reducer;

[0035] 3. starting the motor to drive the flange, the reducer to be tested and the load disc to rotate coaxially, when the force applying column on the load disc rotates to the position of contacting the swing arm, the swing arm is pushed to rotate from the low point to the high point, after rotating to the high point, the swing arm rotates from the high point to the low point rapidly under the action of the weight, the impact force is applied to the force receiving column at the low point position, the impact force is transmitted to the reducer to be tested through the load disc to form the impact load, the reducer is subjected to the periodic alternating load and the impact load in the whole operation process, the situation consistent with the actual working condition is achieved, and the actual service life of the reducer can be better reflected through the test bench.

[0036] Although the embodiments and drawings of the present application are disclosed for the purpose of illustration, those skilled in the art can understand that various substitutions, changes and modifications are possible without departing from the spirit of the present application and the appended claims, therefore, the scope of the present application is not limited to the disclosed contents of the embodiments and drawings.

Claims

1. A reducer life test bench considering impact loads, characterized in that: Includes base, bracket, motor, flange, reducer under test, load plate, swing arm, force-applying column, force-bearing column, and counterweight plate; The bracket is fixed to the upper end of the base. Mounting holes are provided on the front upright plate of the bracket. The output end housing of the reducer under test forms a positioning fit with the mounting holes on the bracket. The front end of the flange forms a positioning fit with the rear end of the reducer under test. The flange and the reducer under test are fixedly connected to the front upright plate of the bracket by screws. The output end housing of the motor forms a positioning fit with the rear end of the flange and is fixedly connected by screws. The rear end of the load disk is positioned and fixedly connected to the front end of the output disk of the reducer under test by screws. The central optical axis of the front end of the load disk is rotatably connected to one end of the swing arm through a bearing. The other end of the swing arm is a free end, and a detachable counterweight disk is connected to the other end of the swing arm. Multiple pairs of threaded holes are symmetrically arranged on both sides of the central optical axis on the disk body, and the distance of the multiple pairs of threaded holes from the center line of the load disk increases sequentially. The force-applying column and the force-receiving column can be selectively connected to one of the pairs of threaded holes in a forward-extending manner, so that the force-applying column and the force-receiving column are set at 180° at the front end of the load disk. During the process of the swing arm rotating from the low point to the high point, it forms a contact engagement with the force-applying column. When the swing arm rotates to the low point position, it forms an impact contact with the force-receiving column.

2. The reducer life test bench considering impact load according to claim 1, characterized in that: The bracket is a welded metal component, consisting of a base plate, a front upright plate located at the upper end of the base plate, and two reinforcing ribs connecting the base plate and the front upright plate.

3. The reducer life test bench considering impact load according to claim 1, characterized in that: The flange is a hard aluminum alloy part. Its rear end is provided with a rear interface that matches the shape of the output end housing of the motor, and its front end is provided with a front interface that matches the shape of the input end housing of the reducer under test. An O-ring is installed at the front interface to achieve sealing.

4. The reducer life test bench considering impact load according to claim 1, characterized in that: The load plate includes a plate body, with a positioning stop at the center of the rear end of the plate body that can form a positioning fit with the output plate of the reducer; a central optical axis at the center of the front end of the plate body; and weight reduction holes symmetrically arranged on both sides of the threaded hole on the plate body.

5. The reducer life test bench considering impact load according to claim 1, characterized in that: The force-applying column and the force-receiving column adopt the same structural form, both consisting of a metal body and an outer rubber layer. The rear end of the metal body is provided with an external thread section that mates with the threaded hole on the load plate, and the outer rubber layer is wrapped around the non-threaded section of the metal body.

6. The reducer life test bench considering impact load according to claim 1, characterized in that: One end of the swing arm is machined with an inner hole that mates with the bearing, and the other side is machined with a threaded hole. By installing a screw at the center of the threaded hole and the counterweight plate, the counterweight plate is fixed to the front side of the other end of the swing arm.

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