CN117168848A

CN117168848A - Caterpillar track durability test method and tester

Info

Publication number: CN117168848A
Application number: CN202311262030.5A
Authority: CN
Inventors: 唐顺锋; 张洪国; 杜伟; 李青云; 高丰春; 鲁守浩; 刘晓波; 王丹; 宋庆鑫
Original assignee: Qingdao Houze Jinye Technology Co ltd
Current assignee: Qingdao Houze Jinye Technology Co ltd
Priority date: 2023-09-27
Filing date: 2023-09-27
Publication date: 2023-12-05

Abstract

The application discloses a method and a machine for testing durability of a crawler, wherein the method comprises the steps that the crawler to be tested is arranged on a crawler driving part, the crawler driving part is used for driving the crawler to rotate, and the crawler driving part is arranged on a lifting part; the tensioning force of the crawler belt is adjusted by a tensioning driving mechanism; the radial loading part drives the lifting part to move up and down, and the radial loading part drives the lifting part to move down so as to enable the crawler belt to be in contact with the simulated pavement; the simulated road surface is served by a rotating drum that contacts the track to provide frictional resistance to the track. The test method is used for testing the durability of the rubber track under the conditions of pretension, simulated dead weight of the vehicle body and ground friction, and provides more accurate and reliable durability test data by simulating the real working condition of the rubber track.

Description

Caterpillar track durability test method and tester

Technical Field

The application relates to the technical field of caterpillar band performance test, in particular to a caterpillar band durability test method and a tester.

Background

The rubber crawler belt is an annular rubber belt made of rubber and metal or fiber composite materials, and has good passing performance, so that the rubber crawler belt plays an important role in the fields of military, agriculture, construction and the like. The road simulation test can reflect the reliability and safety of the rubber track.

The prior test scheme comprises the following steps: the rubber tracks of different types are respectively arranged on different crawler-type vehicle running mechanisms, the crawler-type vehicle is driven to a specified road condition and mileage, and the fatigue durability and abrasion performance of the product are judged by detecting the problems of the rubber tracks in the driving process. The disadvantages of the existing test schemes are: the method can only play a role in post-hoc prevention through loading operation, and corresponding test data cannot be collected to guide the research and development of the product, so that the research and development cost of the product is high, the period is long, and the like.

Chinese patent CN103837421a discloses a crawler-type drum test stand device, in which a wheeled vehicle is installed on a track shoe support simulation road, and the device can measure the whole performance of the wheeled vehicle. Although the performance and reliability of the vehicle can be checked under the same condition, the single tire cannot be quantitatively loaded, and the single track cannot be quantitatively loaded and quantitatively tensioned, so that the performance test of the single tire or the single track under the same condition cannot be provided.

The above information disclosed in this background section is only for enhancement of understanding of the background section of the application and therefore it may not form the prior art that is already known to those of ordinary skill in the art.

Disclosure of Invention

Aiming at the problems pointed out in the background art, the application provides a track durability test method and a test machine, which are used for testing the durability of a rubber track under the conditions of pretension, simulated dead weight of a vehicle body and ground friction, and providing more accurate and reliable durability test data by simulating the real working condition of the rubber track.

In order to achieve the aim of the application, the application is realized by adopting the following technical scheme:

the application provides a method for testing durability of a crawler belt, which comprises the following steps:

the crawler belt to be tested is arranged on a crawler belt driving part, the crawler belt driving part is used for driving the crawler belt to rotate, and the crawler belt driving part is arranged on the lifting part;

the tensioning force of the crawler belt is adjusted by a tensioning driving mechanism;

the lifting part is driven to move up and down by the radial loading part, and the radial loading part drives the lifting part to move down so as to enable the crawler belt to be in contact with the simulated pavement;

the simulated road surface is served by a rotating drum that contacts the track to provide frictional resistance to the track.

The application also provides a track durability testing machine, which tests the durability of the track by applying the testing method, and comprises the following steps:

a frame;

the lifting part is arranged on the frame in a sliding manner, and moves up and down along the height direction of the frame;

the radial loading part is arranged on the frame and used for driving the lifting part to move up and down;

the crawler driving part is arranged on the lifting part and is used for driving the crawler to be tested to rotate;

a tensioning drive mechanism for providing a tensioning force to the track to be tested;

and the rotating drum part is arranged below the crawler driving part and is used for contacting with the crawler to be tested so as to provide friction resistance for the crawler.

In some embodiments, the track driving part comprises a track driving motor, a transmission shaft and a wheel frame assembly, wherein the track driving motor is used for driving the transmission shaft to rotate, the transmission shaft is connected with the wheel frame assembly, and the wheel frame assembly is provided with a track to be tested.

In some embodiments, a front-to-back open mounting space is formed in the frame;

the lifting part comprises a lifting vertical part and a box body, the lifting vertical part is arranged on the front side surface of the frame in a sliding manner, and the box body extends from the lifting vertical part to the rear of the frame through the installation space;

the crawler driving motor is arranged in the box body, a supporting bearing is arranged on the lifting vertical part, and the transmission shaft penetrates through the supporting bearing.

In some embodiments, the wheel frame assembly comprises a wheel frame, a driving wheel and a guiding wheel, the wheel frame is fixedly arranged on the lifting part, the driving wheel is connected with the transmission shaft, the driving wheel is positioned above the wheel frame, the guiding wheel is arranged at the left end and the right end of the wheel frame, and the lower riding wheel is arranged at the bottom side of the wheel frame;

at least one guide wheel is connected with a tensioning driving mechanism, and the tensioning driving mechanism drives the guide wheel to move along the horizontal direction so as to adjust the tensioning force of the crawler to be tested.

In some embodiments, the wheel frame comprises a wheel frame main body and a wheel frame extension arm, the wheel frame extension arm is fixedly connected with the lifting part, the driving wheel is positioned above the wheel frame main body, the guide wheels are arranged at two ends of the wheel frame main body, and the lower riding wheel is arranged at the bottom side of the wheel frame main body;

an installation space for installing the tensioning driving mechanism is formed in the wheel frame main body.

In some embodiments, the tensioning driving mechanism includes a tensioning driving portion and a tensioning moving portion, the tensioning driving portion is fixedly arranged in an internal installation space of the wheel frame, an opening for the tensioning moving portion to extend out is formed in the end portion of the wheel frame, one end of the tensioning moving portion is slidably connected with an inner wall surrounding the installation space, the other end of the tensioning moving portion is provided with the guide wheel, and the tensioning driving portion is used for driving the tensioning moving portion to move in the horizontal direction.

In some embodiments, the bottom side of the wheel frame is provided with a plurality of lower riding wheels, and the plurality of lower riding wheels are positioned in the same horizontal plane so that the bottom of the crawler belt to be tested is formed with a flat section, and the flat section is contacted with the rotary drum part.

In some embodiments, the radial loading part comprises a lifter and a radial driving motor, the lifter and the radial driving motor are arranged at the top of the frame, one end of the lifter is connected with the lifting part through a force sensor, the other end of the lifter is connected with the radial driving motor, and the lifter is used for driving the lifting part to move up and down.

In some embodiments, the drum portion includes a drum, a drum drive motor, and a brake coupled to the drum drive motor, the drum drive motor coupled to the drum for contact with the track to be tested.

Compared with the prior art, the application has the advantages and positive effects that:

the method for testing the durability of the crawler belt is used for testing the durability of the rubber crawler belt under the conditions of pretension, simulating dead weight of a vehicle body and ground friction. Tensioning the crawler belt by a tensioning driving mechanism and adjusting the tensioning force of the crawler belt; the loading of the radial loading part is used for simulating the gravity of the tracked vehicle; the drum portion is used as a simulated road surface to provide frictional resistance to the track. The tester has the functions of loading, tensioning and simulating ground friction, provides the truest working condition for the crawler belt, and further provides more accurate and reliable endurance test data for crawler belt users, manufacturers and the like.

Other features and advantages of the present application will become apparent upon review of the detailed description of the application in conjunction with the drawings.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.

FIG. 1 is a schematic view of a placement structure of a track durability tester on the ground according to an embodiment;

FIG. 2 is a schematic view of a track durability tester according to an embodiment;

FIG. 3 is a force analysis diagram of a track durability tester according to an embodiment;

FIG. 4 is a schematic view of a construction of a track durability tester according to an embodiment with a drum portion omitted;

FIG. 5 is a schematic view of a track durability tester according to an embodiment, from the rear side;

FIG. 6 is a schematic view of a structure of a lifting portion, track drive portion according to an embodiment;

FIG. 7 is a schematic view of a structure of a drum portion according to an embodiment;

reference numerals:

10. a track; 11. a straight section;

20. ground surface; 21. a pit;

100. a frame; 110. a first slide rail;

200. a radial loading section; 210. a radial drive motor; 220. a lifter;

300. a crawler belt driving part; 310. a transmission shaft; 320. a track drive motor; 330. a speed reducer; 380. a support bearing; 390. a wheel carrier assembly; 391. a wheel carrier; 3911. a wheel carrier body; 3912. a wheel carrier extension arm; 392. a driving wheel; 393. a guide wheel; 394. a lower riding wheel;

400. a tensioning drive mechanism; 410. a tension driving part; 411. a power output shaft; 420. tensioning the moving part;

500. a drum section; 510. a rotating drum; 520. a drum driving motor; 530. a brake; 540. a first chassis; 550. a second chassis;

600. a lifting part; 610. lifting the vertical portion; 620. a box body.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

In the present application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The following disclosure provides many different embodiments, or examples, for implementing different features of the application. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the application. Furthermore, the present application may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

The embodiment discloses a track durability testing machine which is used for testing the durability of a rubber track under the conditions of pretension, simulating the dead weight of a vehicle body and ground friction. Referring to fig. 1 and 2, it mainly includes a frame 100, a lifting part 600, a radial loading part 200, a track driving part 300, a drum part 500, and the like.

The frame 100 has a rectangular frame structure as a whole, and serves as a mounting carrier for the lifting unit 600, the radial loading unit 200, and the crawler belt driving unit 300.

The lifting part 600 is slidably disposed on the frame 100, and the lifting part 600 moves up and down along the height direction of the frame 100.

The up-and-down movement of the lifting part 600 is driven by the radial loading part 200, the radial loading part 200 is provided on the frame 100, and the radial loading part 200 drives the lifting part 600 to move up-and-down. The loading of the radial loading portion 200 serves to simulate the weight of a tracked vehicle.

The track driving part 300 is provided on the lifting part 600 for driving the track 10 to be tested to rotate.

The tensioning drive 400 is used to provide tensioning force to the track 10.

The drum part 500 is provided below the track driving part, and the drum part 500 is used to provide frictional resistance to the track 10 to be tested. Drum portion 500 functions to simulate a road surface.

At the time of the test, the crawler belt 10 to be tested is mounted on the crawler belt driving section 300; tensioning the track 10 by the tensioning drive mechanism 400 and adjusting the tensioning force of the track 10; the radial loading part 200 drives the lifting part 200 to move downwards, so that the crawler 10 is contacted with the drum part 500, the radial loading part 200 continues to load, the crawler 10 continuously presses the drum part 500 downwards, and the loading of the radial loading part 200 is used for simulating the gravity of the crawler vehicle; the track driving part 300 drives the track 10 to rotate, and the drum part 500 contacts the track 10 to provide frictional resistance to the track 10.

The loading force provided by the radial loading portion 200 is denoted as F _{Loading force} The tension provided by the tension drive mechanism 400 is denoted as F _{Tension force} The friction force provided by drum portion 500 is denoted as F _{Friction force} The force analysis is shown in figure 3.

The tester in the embodiment has the functions of loading, tensioning and simulating ground friction, provides the truest working condition for the crawler belt, and further provides more accurate and reliable endurance test data for users, manufacturers and the like of the crawler belt.

In some embodiments, referring to fig. 4, the radial loading part 200 includes a lifter 220 and a radial driving motor 210, one end of the lifter 220 is connected to the lifter 600 through a force sensor, and the other end is connected to the radial driving motor 210, and the lifter 220 is used to drive the lifter 600 to move up and down, thereby moving the track 10 downward to contact the drum 510 or upward to be separated from the drum 510.

The lifter 220 is disposed above the lifting portion 600, a force sensor is disposed at the top of the lifting portion 600, and the radial driving motor 210 is disposed at the top of the frame 100.

In some embodiments, referring to fig. 4 to 6, the track driving part 300 includes a track driving motor 320, a driving shaft 310, and a wheel frame assembly 390, the track driving motor 320 is used to drive the driving shaft 310 to rotate, the driving shaft 310 is connected with the wheel frame assembly 390, and the wheel frame assembly 390 is provided with the track 10 to be tested.

A front-rear open installation space is formed in the housing 100. Referring to fig. 6, the elevation part 600 includes an elevation vertical part 610 and a case 620, an inner cavity having both front and rear ends opened is formed in the case 620, and the elevation vertical part 610 is provided at the front side opened of the case 620.

The lifting vertical portion 610 is slidably disposed on a front side of the frame 100, and the case 620 extends from the lifting vertical portion 610 to a rear of the frame 100 through an internal installation space of the frame 100.

The front side of the frame 100 is provided with a first sliding rail 110, the lifting vertical portion 610 is correspondingly provided with a first sliding block, and sliding installation of the lifting portion 600 on the frame 100 is realized through sliding connection between the first sliding block and the first sliding rail 110.

The track driving motor 320 is disposed on the bottom wall of the inner cavity of the box 620, the lifting vertical portion 610 is provided with a support bearing 380, and the transmission shaft 310 passes through the support bearing 380.

Referring to fig. 5 and 6, a driving wheel 392 is provided at one end of the driving shaft 310, a first coupling is provided at the other end, the track driving motor 320 is connected to a second coupling through the speed reducer 330, and the first coupling is connected to the second coupling through a torque sensor.

The track driving motor 320 is disposed at one side of the housing 620, the track 10 is disposed at the other side of the housing 620, and both are disposed at the outer side of the frame 100, so that the main body portion of the housing 120 is disposed in the inner cavity of the frame 100, and the structure is compact, and the up-down movement of the housing 120 along the frame 100 is facilitated. The crawler belt driving motor 320 and the crawler belt 10 have larger volumes, and are externally arranged on the outer side of the frame 100, so that the crawler belt 10 is convenient to assemble and disassemble, and the compact assembly between the frame 100 and the box 120 is not affected.

In some embodiments, referring to fig. 6, wheel carriage assembly 390 includes a wheel carriage 391, a drive wheel 392, and a guide wheel 393.

The wheel frame 391 is fixedly disposed on the lifting part 600, specifically, the lifting vertical part 610. The driving wheel 392 is connected to the transmission shaft 310, the driving wheel 392 is located above the wheel frame 391, guide wheels 393 are provided at both left and right ends of the wheel frame, and a lower supporting wheel 394 is provided at the bottom side of the wheel frame 391.

At least one guide wheel 393 is connected to the tensioning drive 400, the tensioning drive 400 driving the guide wheel 393 to move in a horizontal direction to adjust the tensioning force of the track 10 to be tested.

The four-way arrangement of the driving wheel 392, the left and right guide wheels 393, and the lower riding wheel 394 improves the mounting reliability of the crawler belt 10.

The wheel frame 391 also serves as a mounting carrier for the tensioning drive 400, which is more compact in construction, facilitating adjustment of the tensioning force of the track 10.

In one embodiment, the guide wheels 393 on the left and right sides of the wheel frame 391 act as tensioning wheels, each of which is driven by a separate tensioning drive 400.

In some embodiments, drive wheel 392 is removable, and the overall machine applicability is improved by changing drive wheels 392 of different specifications to test different specifications of tracks.

In some embodiments, referring to fig. 6, the wheel frame 391 includes a wheel frame main body 3911 and a wheel frame extension arm 3912, the wheel frame extension arm 3912 is fixedly connected with the lifting vertical portion 610, the driving wheel 392 is located above the wheel frame main body 3911, the left and right ends of the wheel frame main body 3911 are provided with guide wheels 393, and the bottom side of the wheel frame main body 3911 is provided with a lower riding wheel 394.

The wheel carrier main body 3911 is internally provided with an installation space for installing the tensioning driving mechanism 400, and the tensioning driving mechanism 400 is built in and has a more compact structure.

In some embodiments, referring to fig. 6, the tensioning driving mechanism 400 includes a tensioning driving part 410 and a tensioning moving part 420, the tensioning driving part 410 is fixedly arranged in an internal installation space of the wheel frame main body 3911, one end of the tensioning moving part 420 is slidably connected with an inner wall surrounding the installation space, the other end of the tensioning moving part 420 is provided with a guiding wheel 393, and the tensioning driving part 410 is used for driving the tensioning moving part 420 to move along the horizontal direction. Specifically, the power output shaft 411 of the tensioning driving part 410 is fixedly connected with the tensioning moving part 420, and the tensioning moving part 420 is driven to synchronously move horizontally through the horizontal movement of the power output shaft 411.

The second sliding rail is arranged on the bottom wall of the inner cavity of the wheel carrier main body 3911, the second sliding block is correspondingly arranged on the tensioning moving part 420 and is in sliding connection with the second sliding rail, and the second sliding block plays a role in guiding the horizontal movement of the tensioning moving part 420.

In some embodiments, the bottom side of the truck body 2911 is provided with a plurality of lower idlers 394, the plurality of lower idlers 394 being in the same horizontal plane, such that the bottom of the track to be tested is formed with a flat segment 11, the flat segment 11 being in contact with the drum 510, so that the drum 510 provides frictional resistance to the track 10.

In some embodiments, referring to fig. 7, drum portion 500 includes a drum 510, a drum drive motor 520, and a brake 530, brake 530 being coupled to drum drive motor 520, drum drive motor 520 being coupled to drum 510, drum 510 being configured to contact track 10 to be tested.

Drum drive motor 520 is controlled by brake 530 to adjust the rotational speed of drum 510, and thus the speed differential between drum 510 and track 10, to provide different frictional resistance to track 10.

The drum 510 is mounted on the first chassis 540 through a rotation shaft, and the brake 530 and the drum driving part 520 are mounted on the second chassis 550.

In some embodiments, referring to fig. 1, a pit 21 is dug downwards on the ground 20, the first chassis 540 and the second chassis 550 are placed in the pit 21, the drum part 500 is located in the pit 21 and is arranged in a sinking manner relative to the ground 20, and the frame 100 is placed on the ground 20, so that the installation position of the crawler belt can be lowered, and the disassembly and assembly operations of the crawler belt are facilitated.

In some embodiments, a track durability test method is provided, comprising:

the track to be tested 10 is mounted on the track driving part 300, the track driving part 300 is used for driving the track 10 to rotate, and the track driving part 300 is mounted on the lifting part 600;

the tensioning force of the track 10 is adjusted by the tensioning drive 400;

the lifting part 600 is driven to move up and down by the radial loading part 200, and the lifting part 600 is driven to move down by the radial loading part 200 so that the crawler 10 is in contact with the simulated road surface;

the drum 510 acts as a simulated road surface, the drum 510 being in contact with the track 10 to provide frictional resistance to the track 10.

In the description of the above embodiments, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present application should be included in the scope of the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.

Claims

1. A method for testing durability of a track, comprising:

2. A track durability testing machine for performing a durability test on a track using the test method of claim 1, said testing machine comprising:

a frame;

3. The machine for testing the durability of a crawler belt according to claim 2, wherein,

the crawler driving part comprises a crawler driving motor, a transmission shaft and a wheel frame assembly, wherein the crawler driving motor is used for driving the transmission shaft to rotate, the transmission shaft is connected with the wheel frame assembly, and the wheel frame assembly is provided with a crawler to be tested.

4. The machine for testing the durability of a crawler belt according to claim 3, wherein,

an installation space with front and rear openings is formed in the frame;

5. The machine for testing the durability of a crawler belt according to claim 3, wherein,

the wheel frame assembly comprises a wheel frame, a driving wheel and a guiding wheel, the wheel frame is fixedly arranged on the lifting part, the driving wheel is connected with the transmission shaft and is positioned above the wheel frame, the guiding wheel is arranged at the left end and the right end of the wheel frame, and a lower riding wheel is arranged at the bottom side of the wheel frame;

6. The machine for testing the durability of a crawler belt according to claim 5, wherein,

the wheel carrier comprises a wheel carrier main body and a wheel carrier extension arm, the wheel carrier extension arm is fixedly connected with the lifting part, the driving wheel is positioned above the wheel carrier main body, the guide wheels are arranged at two ends of the wheel carrier main body, and the lower riding wheels are arranged at the bottom side of the wheel carrier main body;

7. The machine for testing the durability of a crawler belt according to claim 5, wherein,

the tensioning driving mechanism comprises a tensioning driving part and a tensioning moving part, the tensioning driving part is fixedly arranged in an inner installation space of the wheel frame, an opening for the tensioning moving part to extend out is formed in the end part of the wheel frame, one end of the tensioning moving part is in sliding connection with the inner wall surrounding the installation space, the other end of the tensioning moving part is provided with the guide wheel, and the tensioning driving part is used for driving the tensioning moving part to move along the horizontal direction.

8. The machine for testing the durability of a crawler belt according to claim 5, wherein,

the bottom side of the wheel frame is provided with a plurality of lower riding wheels which are positioned in the same horizontal plane, so that a flat section is formed at the bottom of the caterpillar band to be tested, and the flat section is contacted with the rotary drum part.

9. The machine according to any one of claims 2 to 8, wherein,

the radial loading part comprises a lifter and a radial driving motor, the lifter and the radial driving motor are arranged at the top of the frame, one end of the lifter is connected with the lifting part through a force sensor, the other end of the lifter is connected with the radial driving motor, and the lifter is used for driving the lifting part to move up and down.

10. The machine according to any one of claims 2 to 8, wherein,

the rotary drum part comprises a rotary drum, a rotary drum driving motor and a brake, wherein the brake is connected with the rotary drum driving motor, the rotary drum driving motor is connected with the rotary drum, and the rotary drum is used for being contacted with a track to be tested.