A kind of excavator rotation torque testing device

Abstract

The utility model discloses an excavator rotation torque test device, which realizes flexible adjustment of the position of the dynamometer through a lifting block to ensure the accuracy of the test. The device adopts a cylindrical stone pier counterweight block and a U-shaped bracket design, and the use of reinforcing rods and steel cables enhances the load-bearing capacity and stability. During the test, the operator can adjust the position of the lifting block according to the height of the excavator bucket and lock it to prevent rotation. The torque of the excavator during the rotation process is measured by a dynamometer, and the accurate value is calculated using a formula. The device has a reasonable design, simple operation, and accurate testing. It provides an effective tool for excavator torque testing and helps to improve excavator performance evaluation and improvement work.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering machinery, in particular to a rotary moment testing device for an excavator. Background Art

[0002] With the continuous development of engineering machinery technology, the excavator rotation torque test device is also constantly updated and upgraded to adapt to more complex and sophisticated testing needs. The excavator rotation torque test device is a device that performs integrated testing on the excavator's rotation torque and rotation friction resistance torque to improve the test accuracy and device utilization rate. Through precise measurement and analysis, it can provide important data support for the design, manufacture and maintenance of the excavator, thereby improving the performance and reliability of the excavator.

[0003] In the prior art, there is an excavator rotation torque test device with a publication number of "CN212621214U", which includes a counterweight block and multiple brackets; the counterweight block is fixed on the ground, and the multiple brackets are installed on the counterweight block; during measurement, a dynamometer is connected to the bracket, and the position of the dynamometer on the bracket is adjusted to ensure that the dynamometer and the rotation circle of the excavator being tested are in the same plane. The device has a simple structure, low cost, strong practicality, and good stability. During the loading process, it can not only ensure that the fixed point will not move, but also make the fixed point adjustable up and down to ensure that the dynamometer and the rotation circle of the tested model are in the same plane.

[0004] However, the existing technology still has major deficiencies, such as:

[0005] Since the sizes and heights of excavators in the prior art are different, it is difficult for the above-mentioned device to complete the test of excavators of different heights. Although the operator can complete the test of excavators of different heights by designing different brackets, adding multiple brackets will not only increase the manufacturing cost, but also increase the difficulty of manufacturing the test device. Therefore, a device that can test excavators of different sizes and heights is needed. Utility Model Content

[0006] The purpose of the utility model is to provide a rotary torque testing device for an excavator to solve the problems raised in the above background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A device for testing the rotary torque of an excavator comprises a counterweight and a bracket, wherein the counterweight is fixedly arranged on the ground, the bracket is fixedly arranged on the counterweight, a lifting block is movably arranged on the bracket, the lifting block can move up and down along the axial direction of the bracket, a pull ring for fixing a dynamometer is rotatably arranged on the lifting block, and a locking device for preventing the lifting block from rotating is arranged between the lifting block and the bracket.

[0009] Preferably, the locking device comprises a guide groove formed on a side wall of the bracket, and a locking bolt is rotatably provided on the lifting block. The locking bolt passes through the lifting block and is arranged in the guide groove.

[0010] Preferably, the counterweight block is a cylindrical stone pier, and the cylindrical stone pier is formed by cement casting.

[0011] Preferably, the bracket is a U-shaped frame, and both ends of the U-shaped frame are embedded in and penetrate the counterweight block.

[0012] Preferably, the portion of the U-shaped frame located at the counterweight block is provided with anti-slip grooves.

[0013] Preferably, a reinforcing rod is fixedly provided on the U-shaped frame, and the reinforcing rod is arranged in the cylindrical stone pier, and the axis of the reinforcing rod coincides with the axis of the cylindrical stone pier.

[0014] Preferably, a connecting rod is fixedly provided on the reinforcing rod, and one end of the connecting rod passes through the cylindrical stone pier.

[0015] Preferably, the end of the U-shaped frame is fixedly connected with a steel cable, the end of the connecting rod is also fixedly connected with a steel cable, and the other end of the steel cable is fixedly arranged on the bottom surface.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The lifting block design in the device makes the test operation more flexible and convenient. The lifting block can move up and down along the axis of the bracket. This design allows the operator to accurately adjust the position of the dynamometer according to the different heights of the excavator bucket to ensure that it is in the same plane as the swing circle of the excavator being tested. This flexibility not only improves the accuracy of the test, but also greatly simplifies the test process and improves work efficiency.

[0018] 2. The setting of the reinforcement rod significantly enhances the load-bearing capacity and stability of the bracket. The reinforcement rod is firmly set in the cylindrical stone pier by welding and fixedly connected to the U-shaped frame to form a stable support structure. This design not only improves the overall strength of the bracket, but also effectively disperses the tensile force generated during the test, preventing the device from being deformed or damaged due to uneven force.

[0019] 3. The application of steel cables further enhances the stability of the device. Steel cables are fixed to the ends of the U-shaped frame and the ends of the connecting rods, and the other ends of these steel cables are firmly fixed to the ground, forming a stable support network. This design enables the device to maintain a stable posture when subjected to the rotary torque of the excavator, preventing the accuracy of the test results from being affected by shaking or offset.

[0020] During the use of the utility model, the excavator must first be parked stably so that the device is located in the tangent direction of the excavator bucket's rotation circle. Then, the operator moves the position of the lifting block on the bracket according to the specific height of the excavator bucket, and locks the lifting block on the bracket with a locking bolt. Next, the dynamometer is connected between the pull ring and the excavator bucket. The excavator is started to rotate. At this time, the distance between the excavator bucket and its rotation center is L, and the value measured by the dynamometer is F. According to the formula M=FxL, the moment M of the excavator during the rotation process can be calculated. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of the overall device of the utility model;

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of the reinforcing rod of the utility model;

[0023] Figure 3 This is a schematic diagram of the three-dimensional structure of the anti-slip pattern of the utility model;

[0024] Figure 4 This is a schematic diagram of the three-dimensional structure of the guide groove of the utility model;

[0025] Figure 5 This is a top view of the utility model during the test experiment.

[0026] In the figure: 1. counterweight; 2. bracket; 3. lifting block; 4. pull ring; 5. guide groove; 6. locking bolt; 7. anti-slip groove; 8. reinforcement rod; 9. connecting rod; 10. steel cable. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1-5 , the utility model provides a technical solution:

[0029] An excavator slewing moment test device includes a counterweight 1 and a bracket 2. The counterweight 1 is fixedly set on the ground. The counterweight 1 is the basic part of the device. It adopts a cylindrical stone pier design and is formed by cement casting to ensure the stability and load-bearing capacity of the entire device. The bracket 2 is fixedly set on the counterweight 1. The bracket 2 adopts a U-shaped frame design, and its two ends are embedded in and penetrate the counterweight 1 to increase the stability of the bracket 2. Anti-skid patterns 7 are set at the part of the U-shaped frame located at the counterweight 1. These anti-skid patterns 7 not only increase the friction between the U-shaped frame and the counterweight 1, but also increase the contact area, so that the U-shaped frame is more secure in the counterweight 1 and is not easy to loosen.

[0030] During measurement, a dynamometer is connected to the bracket 2, and the position of the dynamometer on the bracket 2 is adjusted to ensure that the dynamometer and the rotating circle of the excavator being tested are in the same plane. A lifting block 3 is movably provided on the bracket 2, and the lifting block 3 can move up and down along the axis of the bracket 2. This design enables the device to adapt to excavator buckets of different heights and facilitates test operations. A pull ring 4 for fixing the dynamometer is rotatably provided on the lifting block 3, and a locking device for preventing the lifting block 3 from rotating is provided between the lifting block 3 and the bracket 2.

[0031] In order to ensure the stability of the lifting block 3 during the excavator rotation torque test and prevent it from rotating or deflecting, the device is carefully designed with a locking device. The design of the locking device fully considers the needs in actual use and ensures the accuracy and reliability of the test.

[0032] Specifically, the locking device mainly consists of a guide groove 5 and a locking bolt 6. The guide groove 5 is cleverly opened on the side wall of the bracket 2, and its shape and size are precisely calculated to accommodate the passage of the locking bolt 6 and effectively guide and constrain it. The lifting block 3 is rotatably provided with a locking bolt 6. This design allows the locking bolt 6 to flexibly adjust its position to adapt to excavator buckets of different heights.

[0033] During the test, the operator first accurately moves the position of the lifting block 3 on the bracket 2 according to the specific height of the excavator bucket. When the lifting block 3 is moved to the appropriate position, the operator uses the locking screw to firmly lock the lifting block 3 on the bracket 2. At this time, the locking bolt 6 not only fixes the lifting block 3, but also prevents the lifting block 3 from rotating because it passes through the lifting block 3 and is set in the guide groove 5. In this way, even when the dynamometer is subjected to tension, the lifting block 3 will not deflect or loosen, thereby ensuring the stability and accuracy of the value measured by the dynamometer. The counterweight block 1 adopts a cylindrical stone pier, which is formed by cement casting.

[0034] Bracket 2 adopts a U-shaped frame design, which is not only simple in structure but also has excellent stability and load-bearing performance.

[0035] The two ends of the U-shaped frame are embedded in and penetrate the counterweight 1. This design makes the bracket 2 and the counterweight 1 form a tight whole, greatly improving the stability of the entire device. When the test device is subjected to the rotation torque of the excavator bucket, the U-shaped frame can effectively distribute the force to the counterweight 1, thereby ensuring that the entire device will not tilt or deform due to uneven force.

[0036] In order to further increase the stability of the U-shaped frame in the counterweight 1, we set anti-skid patterns 7 on the part of the U-shaped frame located at the counterweight 1. These anti-skid patterns 7 not only increase the friction between the U-shaped frame and the counterweight 1, so that the bracket 2 is not easy to slide when subjected to external force; at the same time, the anti-skid patterns 7 also increase the contact area, making the U-shaped frame more firmly fixed in the counterweight 1, and not easy to loosen or deform due to force. A reinforcing rod 8 is fixedly arranged on the U-shaped frame, and the reinforcing rod 8 is arranged in the cylindrical stone pier. The axis of the reinforcing rod 8 coincides with the axis of the cylindrical stone pier. The reinforcing rod 8 is arranged in the cylindrical stone pier by welding. Through such an arrangement, the U-shaped frame can be more stable when subjected to tension. At the same time, the reinforcing rod 8 can also strengthen the strength of the cylindrical stone pier, making the cylindrical stone pier more stable when subjected to force, thereby increasing the overall service life of the device. The reinforcing rod 8 can be made of materials such as threaded steel. The material of the reinforcing rod 8 is not specifically limited here, and the operator can choose a suitable material according to actual conditions.

[0037] In this embodiment, in order to enhance the load-bearing capacity and stability of the bracket 2, a reinforcing rod 8 is fixedly provided on the U-shaped frame of the device. The reinforcing rod 8 is arranged in the cylindrical stone pier, and its axis coincides with the axis of the cylindrical stone pier. The reinforcing rod 8 is firmly arranged in the cylindrical stone pier by welding, so that the U-shaped frame can remain stable when subjected to tension. At the same time, the reinforcing rod 8 can also strengthen the strength of the cylindrical stone pier, making it more stable when subjected to force, thereby extending the service life of the entire device. A connecting rod 9 is fixedly provided on the reinforcing rod 8, and one end of the connecting rod 9 passes through the cylindrical stone pier and is arranged in the middle part of the reinforcing rod 8. The connecting rod 9 is also fixedly provided on the reinforcing rod 8 by welding. Through the arrangement of the connecting rod 9, the fixing points of the reinforcing rod 8 are further increased, so that the bracket 2 is more stable when subjected to tension.

[0038] A connecting rod 9 is fixedly arranged on the reinforcing rod 8, one end of the connecting rod 9 passes through the cylindrical stone pier, the connecting rod 9 is arranged in the middle part of the reinforcing rod 8, and the connecting rod 9 is also fixed on the reinforcing rod 8 by welding. Through the arrangement of the connecting rod 9 and the steel cable 10, the fixing points of the reinforcing rod 8 are increased, so that the bracket 2 is more stable when under tension.

[0039] In order to improve the stability of the device, a steel cable 10 is fixedly connected to the end of the U-shaped frame, and a steel cable 10 is also fixedly connected to the end of the connecting rod 9, and the other end of the steel cable 10 is fixedly set on the bottom surface. The steel cable 10 is fixed to the end of the U-shaped frame and the end of the connecting rod 9, and the other end of the steel cable 10 is fixedly set on the ground, which increases the stability of the cylindrical stone column and the bracket 2 when they are under tension. Even if they are subjected to the pulling force of the excavator, they can work stably. The other end of the steel cable 10 can be fixed to the ground by connecting ground nails, etc. The specific installation method is not limited here, and the operator can flexibly implement it according to the specific situation. The steel cable 10 can be fixed to the end of the above-mentioned components by welding, etc.

[0040] Working principle: First, make sure the excavator is parked on a flat and stable ground to prevent it from moving or tilting during the test. Then, place the device in the tangent direction of the excavator bucket's rotation circle, so that the dynamometer can accurately measure the tension generated by the bucket when the excavator is rotating.

[0041] Next, the operator needs to adjust the position of the lifting block 3 on the bracket 2 according to the specific height of the excavator bucket. By moving the lifting block 3, it can be ensured that the dynamometer and the swing circle of the excavator under test are in the same plane, thereby improving the accuracy of the test. After adjusting the position of the lifting block 3, the locking bolt 6 is used to firmly lock the lifting block 3 on the bracket 2 to prevent sliding or offset during the test.

[0042] Subsequently, one end of the dynamometer is connected to the pull ring 4, and the other end is connected to the excavator bucket. In this way, when the excavator performs a rotation action, the dynamometer can measure the pulling force generated by the bucket in real time.

[0043] Start the excavator and make it rotate. At this time, the operator needs to pay close attention to the changes in the dynamometer readings and record the distance L between the excavator bucket and its rotation center and the value F measured by the dynamometer. These two data are key parameters for calculating the excavator's rotation torque.

[0044] Finally, according to the formula M = FxL, the moment M of the excavator during the rotation process can be calculated. By comparing the moment values ​​under different test conditions, the performance of the excavator can be evaluated, providing an important basis for safe use.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An excavator rotation torque test device, comprising a counterweight (1) and a bracket (2), wherein the counterweight (1) is fixedly arranged on the ground, and the bracket (2) is fixedly arranged on the counterweight (1), characterized in that: A lifting block (3) is movably provided on the bracket (2), and the lifting block (3) can move up and down along the axial direction of the bracket (2). A pull ring (4) for fixing a tensile gauge is rotatably provided on the lifting block (3), and a locking device for preventing the lifting block (3) from rotating is provided between the lifting block (3) and the bracket (2).

2. The excavator rotation torque test device according to claim 1, characterized in that: The locking device comprises a guide groove (5) formed on the side wall of the bracket (2); a locking bolt (6) is rotatably arranged on the lifting block (3); the locking bolt (6) passes through the lifting block (3) and is arranged in the guide groove (5).

3. The excavator rotation torque test device according to claim 2, characterized in that: The counterweight block (1) is a cylindrical stone pier, and the cylindrical stone pier is formed by pouring cement.

4. The excavator rotation torque test device according to claim 3, characterized in that: The bracket (2) is a U-shaped frame, and both ends of the U-shaped frame are embedded in and penetrate the counterweight (1).

5. The excavator rotation torque test device according to claim 4, characterized in that: The portion of the U-shaped frame located on the counterweight (1) is provided with anti-slip grooves (7).

6. The excavator rotation torque test device according to claim 5, characterized in that: A reinforcing rod (8) is fixedly arranged on the U-shaped frame, and the reinforcing rod (8) is arranged in the cylindrical stone pier, and the axis of the reinforcing rod (8) coincides with the axis of the cylindrical stone pier.

7. The excavator rotation torque test device according to claim 6, characterized in that: A connecting rod (9) is fixedly arranged on the reinforcing rod (8), and one end of the connecting rod (9) passes through the cylindrical stone pier.

8. The excavator rotation torque test device according to claim 7, characterized in that: The end of the U-shaped frame is fixedly connected to a steel cable (10), the end of the connecting rod (9) is also fixedly connected to a steel cable (10), and the other end of the steel cable (10) is fixedly arranged on the bottom surface.

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