CN109000907B - Fatigue test method for guide wheel tensioning mechanism - Google Patents
Fatigue test method for guide wheel tensioning mechanism Download PDFInfo
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- CN109000907B CN109000907B CN201810583692.5A CN201810583692A CN109000907B CN 109000907 B CN109000907 B CN 109000907B CN 201810583692 A CN201810583692 A CN 201810583692A CN 109000907 B CN109000907 B CN 109000907B
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- G01M13/00—Testing of machine parts
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Abstract
The invention relates to a fatigue test method of a guide wheel tensioning mechanism, which comprises the following steps: step one, installing and combining a tensioning oil cylinder, a compression spring and a guide wheel into a whole; secondly, placing the guide wheel tensioning mechanism on a test device, adjusting a hydraulic oil cylinder to enable a sliding seat to move forwards, enabling a spring seat of the guide wheel tensioning mechanism to be abutted against a fixed seat on the rear side of the test device, and enabling an upper group of supporting wheel assemblies and a lower group of supporting wheel assemblies to be abutted against guide wheels; adjusting the front and rear positions of the righting mechanism on the guide rod, and enabling the upper righting plate and the lower righting plate to clamp the guide wheel bracket and suspend the guide wheel in the air; and fourthly, starting the motor reducer, enabling the hydraulic oil cylinder to stretch back and forth to simulate the actual working condition, and simultaneously performing fatigue test on the tensioning oil cylinder, the compression spring and the guide wheel. The invention can combine the guide wheel and the tensioning mechanism together to simultaneously carry out fatigue test, can simulate the actual working condition compared with the independent test of parts, has more accurate test result, simplifies the detection process and improves the test efficiency.
Description
Technical Field
The invention relates to a fatigue test method for a guide wheel tensioning mechanism, and belongs to the technical field of engineering machinery.
Background
Because the engineering machinery industry is rapidly developed at home in recent years, the country greatly promotes the development of the engineering machinery manufacturing industry, and simultaneously, because the engineering machinery manufacturing industry level in China is still behind compared with that in foreign countries, the foreign engineering machinery is huge to firmly grasp the key technology and inhibit the development of the domestic manufacturing level. With the increase of domestic demand of engineering machinery, the contradiction between supply and demand is gradually increased. The excavator has the advantages of large traction force, strong climbing capability, small turning radius and the like, so the excavator is widely applied to engineering construction and mine development.
The crawler excavator is influenced by the complex road conditions on the ground in the walking process and is inclined forwards under the action of large excavating force, the front end of the crawler belt is stressed and retracted, the crawler belt walking device of the excavator can work normally, proper tension is kept, impact load and extra power consumption during walking are reduced, faults such as breakage or derailment and the like of the crawler belt in the walking process of a vehicle due to impact are avoided, each crawler belt is provided with a tensioning device, and the tensioning device has great influence on the walking performance of the crawler belt.
The present widely used caterpillar band tensioning device is a hydraulic tensioning device with a buffer spring, mainly comprising a tensioning oil cylinder and a compression spring, wherein in the using process, firstly, grease is injected into the tensioning oil cylinder to generate a certain compression amount (pretightening force) to the spring. When the impact force generated by the crawler belt is transmitted to the spring in the structure through the guide wheels in the driving process, the spring correspondingly deforms to absorb the energy of the spring, and meanwhile, the impact force is reduced to the minimum limit, so that the chassis is ensured to work stably.
The performance indexes of the tensioning oil cylinder, the compression spring and the guide wheel are crucial to the normal work of the excavator, so that the quality of the excavator can be guaranteed after the parts are produced through various tests, wherein a fatigue detection test is an important test. The conventional detection test method is characterized in that the tensioning oil cylinder, the compression spring and the guide wheel are respectively and independently detected, the detection process is complex, the detection efficiency is low, the independent detection cannot accurately simulate the actual working condition, the condition of integral use of the oil cylinder cannot be detected, and the detection result is not accurate.
Disclosure of Invention
The invention aims to solve the technical problem of providing a fatigue test method of a guide wheel tensioning mechanism in the prior art, which can combine a tensioning oil cylinder, a compression spring and a guide wheel together to carry out fatigue test at the same time, can simulate the actual working condition compared with the independent test of parts, has more accurate test result, simplifies the detection process and improves the test efficiency.
The technical scheme adopted by the invention for solving the problems is as follows: a method of fatigue testing a tension mechanism of a guide wheel, the method comprising the steps of:
step one, a tensioning oil cylinder, a compression spring and a guide wheel are installed and combined into a whole to form a whole guide wheel tensioning mechanism;
step two, taking a test device, wherein the test device comprises a frame, a front fixing seat and a rear fixing seat are arranged on the frame, a left guide rod group and a right guide rod group are arranged between the front fixing seat and the rear fixing seat, a sliding seat is arranged on the left guide rod group and the right guide rod group, the sliding seat can move back and forth along the guide rods, a hydraulic oil cylinder is arranged on the fixing seat at the rear side, the front end of the hydraulic oil cylinder is connected with the sliding seat, a guide wheel tensioning mechanism is arranged at the front side of the sliding seat, the guide wheel tensioning mechanism comprises a cylinder body, a compression spring and a spring seat, the spring seat is positioned at the front side of the cylinder body, the spring seat is abutted against the fixing seat at the front side through a cushion block, the compression spring is sleeved between the cylinder body and the spring seat, a guide wheel support is arranged at the rear side of the, an upper group of supporting wheels and a lower group of supporting wheels are arranged on the rear side of the sliding seat, and the guide wheels are driven by the upper group of supporting wheels and the lower group of supporting wheels to rotate;
the left side and the right side of the guide wheel are respectively provided with a centering mechanism, each centering mechanism comprises a sliding block, the sliding blocks are sleeved on the guide rods, the inner sides of the sliding blocks are provided with upper centering plates, sliding grooves are formed in the vertical direction below the upper centering plates, lower centering plates are arranged in the sliding grooves, the upper centering plates and the lower centering plates are respectively positioned on the upper side and the lower side of the guide wheel bracket, and locking bolts are arranged between the upper centering plates and the lower centering plates;
the sliding seat is provided with a motor speed reducer which drives the supporting wheel assembly;
a pressure sensor is arranged between the cylinder body and the guide wheel bracket, a rotating speed sensor is arranged between the guide wheel and a rotating shaft of the guide wheel, a displacement sensor is arranged between the cylinder body and the compression spring, a human-computer interface is arranged on one side of the rack, and the pressure sensor, the rotating speed sensor and the displacement sensor are all connected with the human-computer interface;
the guide wheel tensioning mechanism is placed between the left guide rod and the right guide rod of the test device, the hydraulic oil cylinder is adjusted to enable the sliding seat to move forwards, a spring seat of the guide wheel tensioning mechanism is enabled to abut against a fixed seat on the rear side of the test device through a cushion block, and the upper supporting wheel assembly and the lower supporting wheel assembly abut against the guide wheel;
adjusting the front and rear positions of the centering mechanisms on the guide rods to enable the centering mechanisms to be positioned on the left and right sides of the guide wheel bracket, clamping the left and right sides of the guide wheel bracket between an upper centering plate and a lower centering plate of the left and right centering mechanisms, and enabling the upper centering plate and the lower centering plate to clamp the guide wheel bracket and enable the guide wheel to be suspended through locking bolts;
starting a motor reducer, driving a guide wheel to rotate through an upper group of support wheels and a lower group of support wheels, adjusting the rotating speed of the motor reducer to adjust the rotating speed of the guide wheel, and performing fatigue test on a tensioning oil cylinder, a compression spring and the guide wheel simultaneously by simulating the actual working condition of a tensioning mechanism of the guide wheel through the back-and-forth expansion of a hydraulic oil cylinder;
and fifthly, transmitting the pressure of the tensioning oil cylinder, the displacement of the compression spring and the rotating speed of the guide wheel to a human-computer interface display screen by a pressure sensor, a displacement sensor and a rotating speed sensor in real time, and monitoring all parameters in real time in the whole fatigue test process.
Each group of guide rods comprises an upper guide rod and a lower guide rod, and the two guide rods are arranged in parallel up and down.
The motor speed reducer is a double-output-shaft speed reducer, one output shaft is connected with the supporting rotating shaft of the upper grid supporting wheel assembly through a chain wheel mechanism, and the other output shaft is connected with the supporting rotating shaft of the lower side supporting wheel assembly through a gear train.
Compared with the prior art, the invention has the advantages that:
the fatigue test method of the guide wheel tensioning mechanism can combine the tensioning oil cylinder, the compression spring and the guide wheel together to simultaneously carry out fatigue test, can simulate the actual working condition compared with the independent test of parts, has more accurate test result, simplifies the detection process and improves the test efficiency; in addition, the height of the righting plate of the righting mechanism is adjusted, so that the device can be suitable for guide wheels with different diameters and specifications to test; a human-computer interface is arranged on the rack, a display screen on the human-computer interface is used for displaying real-time parameters measured by each sensor, results are visual, and test parameters of each part can be monitored in real time.
Drawings
Fig. 1 is a schematic structural diagram of a testing device used in a fatigue testing method of a guide wheel tensioning mechanism of the invention.
Fig. 2 is a schematic structural diagram of another view angle of a testing device used in the fatigue testing method of the guide wheel tensioning mechanism.
Wherein:
frame 1
Fixed seat 2
Sliding seat 4
Guide wheel tensioning mechanism 6
Cushion block 7
Supporting wheel assembly 8
Supporting rotating shaft 81
Supporting wheel 83
Lock bolt 94
Motor reducer 10
Sprocket mechanism 11
A human-machine interface 13.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
As shown in fig. 1 and 2, the fatigue test device for the guide wheel tensioning mechanism in this embodiment includes a frame 1, the frame 1 is provided with a front fixing seat and a rear fixing seat 2, a left guide rod and a right guide rod 3 are disposed between the front fixing seat and the rear fixing seat 2, a sliding seat 4 is disposed on the left guide rod and the right guide rod 3, the sliding seat 4 can move back and forth along the guide rods 3, a hydraulic oil cylinder 5 is disposed on the fixing seat 3 at the rear side, the front end of the hydraulic oil cylinder 5 is connected with the sliding seat 4, the front side of the sliding seat 4 is provided with a guide wheel tensioning mechanism 6, the guide wheel tensioning mechanism 6 includes a cylinder 65, a compression spring 63 and a spring seat 62, the spring seat 62 is located at the front side of the cylinder 65, the spring seat 62 abuts against the fixing seat 2 at the front side through a cushion block 7, the compression spring 63 is sleeved between the cylinder 65 and the, the guide wheel bracket 61 is provided with a guide wheel 64 through a rotating shaft, the center of the cylinder body 65 is provided with a piston in a penetrating way, the rear end of the piston is connected with the guide wheel bracket 61, the rear side of the sliding seat 4 is provided with an upper group of support wheel components 8 and a lower group of support wheel components 8, and the guide wheel 64 rotates under the driving of the upper group of support wheel components 8 and the lower group of support wheel components 8;
the guide wheel bracket 61 is U-shaped;
the righting mechanisms 9 are arranged on the left side and the right side of the guide wheels 64;
the righting mechanism 9 comprises a sliding block 91, the sliding block 91 is sleeved on the guide rod 3, an upper righting plate 92 is arranged on the inner side of the sliding block 91, a sliding groove is formed in the vertical direction below the upper righting plate 92, a lower righting plate 93 is arranged in the sliding groove, the upper righting plate 92 and the lower righting plate 93 are respectively located on the upper side and the lower side of the guide wheel support 61, a locking bolt 94 is arranged between the upper righting plate 92 and the lower righting plate 93, and the upper righting plate and the lower righting plate can clamp the guide wheel support through the locking bolt, so that the guide wheel support is limited and righted;
each group of guide rods 3 comprises an upper guide rod and a lower guide rod, and the two guide rods 3 are arranged in parallel up and down;
the sliding seat 4 is provided with a motor speed reducer 10, and the motor speed reducer 10 drives the supporting wheel assembly 8;
the supporting wheel assembly 8 comprises a supporting rotating shaft 81, the supporting rotating shaft 81 is arranged on the sliding seat 4 through a left bearing seat and a right bearing seat 82, and a left supporting wheel and a right supporting wheel 83 are arranged on the supporting rotating shaft 81;
a spacer 84 is arranged between the left supporting wheel 83 and the right supporting wheel 83;
the motor reducer 10 is a double-output-shaft reducer, one output shaft of the double-output-shaft reducer is connected with a supporting rotating shaft 81 of the upper grid supporting wheel assembly 8 through a chain wheel mechanism 11, and the other output shaft of the double-output-shaft reducer is connected with a supporting rotating shaft 81 of the lower supporting wheel assembly 8 through a gear train 12;
be provided with pressure sensor between cylinder body 65 and the guide wheel 61 support, be provided with speed sensor between guide wheel 64 and its pivot, be provided with displacement sensor between cylinder body 65 and the compression spring 63, 1 one side of frame is provided with human-computer interface 13, pressure sensor, speed sensor and displacement sensor all are connected with human-computer interface 13, and the various parameters audio-visual demonstration that the sensor surveyed are come out with the display screen on human-computer interface.
The test method comprises the following steps:
step one, a tensioning oil cylinder, a compression spring and a guide wheel are installed and combined into a whole to form a whole guide wheel tensioning mechanism;
secondly, placing the guide wheel tensioning mechanism between a left guide rod group and a right guide rod group of the test device, adjusting a hydraulic oil cylinder to enable a sliding seat to move forwards, enabling a spring seat of the guide wheel tensioning mechanism to abut against a fixed seat on the rear side of the test device through a cushion block, and enabling an upper supporting wheel group and a lower supporting wheel group to abut against guide wheels;
adjusting the front and rear positions of the centering mechanisms on the guide rods to enable the centering mechanisms to be positioned on the left and right sides of the guide wheel bracket, clamping the left and right sides of the guide wheel bracket between an upper centering plate and a lower centering plate of the left and right centering mechanisms, and enabling the upper centering plate and the lower centering plate to clamp the guide wheel bracket and enable the guide wheel to be suspended through locking bolts;
starting a motor reducer, driving a guide wheel to rotate through an upper group of support wheels and a lower group of support wheels, adjusting the rotating speed of the motor reducer to adjust the rotating speed of the guide wheel, and performing fatigue test on a tensioning oil cylinder, a compression spring and the guide wheel simultaneously by simulating the actual working condition of a tensioning mechanism of the guide wheel through the back-and-forth expansion of a hydraulic oil cylinder;
and fifthly, transmitting the pressure of the tensioning oil cylinder, the displacement of the compression spring and the rotating speed of the guide wheel to a human-computer interface display screen by a pressure sensor, a displacement sensor and a rotating speed sensor in real time, and monitoring all parameters in real time in the whole fatigue test process.
In addition to the above embodiments, the present invention also includes other embodiments, and any technical solutions formed by equivalent transformation or equivalent replacement should fall within the scope of the claims of the present invention.
Claims (3)
1. A fatigue test method of a guide wheel tensioning mechanism is characterized by comprising the following steps:
step one, a tensioning oil cylinder, a compression spring and a guide wheel are installed and combined into a whole to form a whole guide wheel tensioning mechanism;
step two, taking a test device, wherein the test device comprises a frame, a front fixing seat and a rear fixing seat are arranged on the frame, a left guide rod and a right guide rod are arranged between the front fixing seat and the rear fixing seat, a sliding seat is arranged on the left guide rod and the right guide rod and can move back and forth along the guide rods, a hydraulic oil cylinder is arranged on the fixing seat at the rear side, the front end of the hydraulic oil cylinder is connected with the sliding seat, a guide wheel tensioning mechanism is arranged at the front side of the sliding seat, a spring seat is arranged at the front side of a cylinder body of the tensioning oil cylinder and is abutted against the fixing seat at the front side through a cushion block, a guide wheel support is arranged at the rear side of the cylinder body, a compression spring is sleeved on the cylinder body and is arranged between the spring seat and the guide wheel support, a guide wheel is arranged on the guide, an upper group of supporting wheel assemblies and a lower group of supporting wheel assemblies are arranged on the rear side of the sliding seat, and the guide wheels are driven by the upper group of supporting wheel assemblies and the lower group of supporting wheel assemblies to rotate;
the left side and the right side of the guide wheel are respectively provided with a centering mechanism, each centering mechanism comprises a sliding block, the sliding blocks are sleeved on the guide rods, the inner sides of the sliding blocks are provided with upper centering plates, sliding grooves are formed in the vertical direction below the upper centering plates, lower centering plates are arranged in the sliding grooves, the upper centering plates and the lower centering plates are respectively positioned on the upper side and the lower side of the guide wheel bracket, and locking bolts are arranged between the upper centering plates and the lower centering plates;
the sliding seat is provided with a motor speed reducer which drives the supporting wheel assembly;
a pressure sensor is arranged between the cylinder body and the guide wheel bracket, a rotating speed sensor is arranged between the guide wheel and a rotating shaft of the guide wheel, a displacement sensor is arranged between the cylinder body and the compression spring, a human-computer interface is arranged on one side of the rack, and the pressure sensor, the rotating speed sensor and the displacement sensor are all connected with the human-computer interface;
the guide wheel tensioning mechanism is placed between the left guide rod and the right guide rod of the test device, the hydraulic oil cylinder is adjusted to enable the sliding seat to move forwards, a spring seat of the guide wheel tensioning mechanism is enabled to abut against a fixed seat on the rear side of the test device through a cushion block, and the upper supporting wheel assembly and the lower supporting wheel assembly abut against the guide wheel;
adjusting the front and rear positions of the centering mechanisms on the guide rods to enable the centering mechanisms to be positioned on the left and right sides of the guide wheel bracket, clamping the left and right sides of the guide wheel bracket between an upper centering plate and a lower centering plate of the left and right centering mechanisms, and enabling the upper centering plate and the lower centering plate to clamp the guide wheel bracket and enable the guide wheel to be suspended through locking bolts;
starting a motor reducer, driving a guide wheel to rotate through an upper group of support wheels and a lower group of support wheels, adjusting the rotating speed of the motor reducer to adjust the rotating speed of the guide wheel, and performing fatigue test on a tensioning oil cylinder, a compression spring and the guide wheel simultaneously by simulating the actual working condition of a tensioning mechanism of the guide wheel through the back-and-forth expansion of a hydraulic oil cylinder;
and fifthly, transmitting the pressure of the tensioning oil cylinder, the displacement of the compression spring and the rotating speed of the guide wheel to a human-computer interface display screen by a pressure sensor, a displacement sensor and a rotating speed sensor in real time, and monitoring all parameters in real time in the whole fatigue test process.
2. The fatigue test method of the tension mechanism of the guide wheel according to claim 1, characterized in that: each group of guide rods comprises an upper guide rod and a lower guide rod, and the two guide rods are arranged in parallel up and down.
3. The fatigue test method of the tension mechanism of the guide wheel according to claim 1, characterized in that: the motor speed reducer is a double-output-shaft speed reducer, one output shaft is connected with the supporting rotating shaft of the upper supporting wheel assembly through a chain wheel mechanism, and the other output shaft is connected with the supporting rotating shaft of the lower supporting wheel assembly through a gear train.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810583692.5A CN109000907B (en) | 2018-06-08 | 2018-06-08 | Fatigue test method for guide wheel tensioning mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810583692.5A CN109000907B (en) | 2018-06-08 | 2018-06-08 | Fatigue test method for guide wheel tensioning mechanism |
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| CN109000907A CN109000907A (en) | 2018-12-14 |
| CN109000907B true CN109000907B (en) | 2020-03-20 |
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| CN201810583692.5A Active CN109000907B (en) | 2018-06-08 | 2018-06-08 | Fatigue test method for guide wheel tensioning mechanism |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111929051B (en) * | 2020-08-21 | 2022-05-03 | 三一重机有限公司 | Guide wheel endurance test system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011042316A (en) * | 2009-08-24 | 2011-03-03 | Caterpillar Sarl | Recoil device of crawler type vehicle |
| CN102183426A (en) * | 2011-03-22 | 2011-09-14 | 三一重机有限公司 | Novel method for testing durability of track tensioning device of hydraulic excavator |
| CN102501057A (en) * | 2011-11-02 | 2012-06-20 | 三一重机有限公司 | Press-installing machine for crawler tension device assembly of hydraulic excavator |
| CN203581160U (en) * | 2013-12-09 | 2014-05-07 | 中联重科股份有限公司 | Track tensioning device and excavator comprising same |
| CN203772555U (en) * | 2013-12-26 | 2014-08-13 | 北京市三一重机有限公司 | Test system of crawler belt tensioning device and crawler belt walking mechanism |
| CN106080821A (en) * | 2016-08-16 | 2016-11-09 | 徐工集团工程机械股份有限公司 | A kind of crawling traction transport vehicle and tensioner thereof |
-
2018
- 2018-06-08 CN CN201810583692.5A patent/CN109000907B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011042316A (en) * | 2009-08-24 | 2011-03-03 | Caterpillar Sarl | Recoil device of crawler type vehicle |
| CN102183426A (en) * | 2011-03-22 | 2011-09-14 | 三一重机有限公司 | Novel method for testing durability of track tensioning device of hydraulic excavator |
| CN102501057A (en) * | 2011-11-02 | 2012-06-20 | 三一重机有限公司 | Press-installing machine for crawler tension device assembly of hydraulic excavator |
| CN203581160U (en) * | 2013-12-09 | 2014-05-07 | 中联重科股份有限公司 | Track tensioning device and excavator comprising same |
| CN203772555U (en) * | 2013-12-26 | 2014-08-13 | 北京市三一重机有限公司 | Test system of crawler belt tensioning device and crawler belt walking mechanism |
| CN106080821A (en) * | 2016-08-16 | 2016-11-09 | 徐工集团工程机械股份有限公司 | A kind of crawling traction transport vehicle and tensioner thereof |
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