Self-leveling traction test bench

Abstract

The utility model relates to traction test technical field especially discloses an automatic leveling traction test bench, including test bench main frame, automatic leveling device, tension sensor and connecting fixing device, is equipped with the test area of being used for setting the equipment to be measured on test bench main frame, automatic leveling device sets up on test bench main frame, tension sensor sets up on automatic leveling device, and automatic leveling device can level tension sensor, and tension sensor is connected with the equipment to be measured through connecting fixing device, is used for detecting the traction of equipment to be measured. The utility model sets up the equipment to be measured on automatic leveling device to level tension sensor, so that the traction of measured keeps as horizontal direction, effectively guarantees the accuracy of measurement data, and also avoids the damage of angle too big to the equipment to be measured and tension sensor.

Description

Technical Field

[0001] This utility model relates to the field of traction force testing technology, and in particular to an automatic leveling traction force test bench. Background Technology

[0002] Before being shipped from the factory, the equipment under test is typically subjected to a traction force test using a direct measurement method. Whether the traction force test meets the standard is a crucial indicator of whether the equipment under test is qualified. Therefore, an efficient and accurate traction force testing method is essential for the equipment under test. Traction force measurement methods vary depending on the application scenario and are generally divided into two main categories: direct measurement and indirect calculation. Direct measurement primarily involves connecting a tension sensor (force sensor) in series with the traction chain, rope, or transmission system. When subjected to force, the strain gauge inside the sensor deforms, outputting an electrical signal, which is then converted into a force value after calibration. A common application is testing the traction force of agricultural machinery pulled by a tractor. However, this method yields results that include the tractor's own resistance, resulting in low accuracy, and requires two devices to complete the experiment.

[0003] Indirect measurement methods estimate traction force indirectly by measuring other physical quantities (such as torque, power, and acceleration): 1. Calculate traction force using torque and speed, which require torque and speed sensors; 2. Calculate traction force when motor power and vehicle speed are known; 3. Infer traction force from acceleration and resistance. Indirect measurement methods are purely theoretical calculations and do not consider losses during motion, thus they cannot provide the same intuitive measurement of traction force as direct measurement methods.

[0004] Therefore, it is necessary to provide a new automatic leveling traction test bench to solve the above-mentioned technical problems. Utility Model Content

[0005] The main purpose of this invention is to provide an automatic leveling traction force test bench, which aims to solve the problem of low accuracy in traction force measurement of existing test equipment.

[0006] To achieve the above objectives, the present invention proposes an automatic leveling traction force test bench, comprising a main frame of the test bench, an automatic leveling device, a tension sensor, and a connecting and fixing device. The main frame of the test bench is provided with a test area for the device under test to be installed. The automatic leveling device is installed on the main frame of the test bench. The tension sensor is installed on the automatic leveling device, which can level the tension sensor. The tension sensor is connected to the device under test through the connecting and fixing device to detect the traction force of the device under test.

[0007] Optionally, the automatic leveling device includes a mounting base, a leveling drive, a tilt sensor, and a controller. The mounting base is detachably mounted on the main frame of the test bench. The leveling drive is mounted on the mounting base, and its output end is connected to the tension sensor. Both ends of the tension sensor are slidably connected to the mounting base and the connecting fixing device in the vertical direction, respectively. The two ends of the tension sensor can be deflected vertically relative to the mounting base and the connecting fixing device, respectively. The tilt sensor is mounted on the tension sensor and is used to detect the angle between the tension sensor and the horizontal plane. The controller is mounted on the mounting base and is electrically connected to the leveling drive and the tilt sensor, respectively.

[0008] Optionally, the mounting base includes a base plate and a support body. The base plate is connected to the main frame of the test bench by fasteners, the support body is disposed on the base plate, and the end of the tension sensor away from the connecting and fixing device is slidably disposed on the support body.

[0009] Optionally, the support body is provided with two horizontal plates spaced apart in the vertical direction; the mounting base also includes a first pin, the two ends of the first pin are respectively connected to the two horizontal plates, the end of the tension sensor away from the connecting and fixing device is slidably sleeved on the first pin, and the tension sensor is clearance-fitted with the first pin.

[0010] Optionally, the main frame of the test bench includes a test bench body, side supports, a reinforcing structure, and stiffeners. The test bench body is provided with the test area, and the test area is provided with anti-slip strips. The side supports are provided on both sides of the test bench body. The reinforcing structure is provided on the test bench body and is connected to the side supports on both sides respectively. Multiple stiffeners are provided between the reinforcing structure and the test bench body, and between the side supports and the test bench body.

[0011] Optionally, the test bench body is provided with multiple mounting holes, and the base plate can be connected to the mounting holes at different positions by fasteners.

[0012] Optionally, the device under test is provided with two symmetrically arranged docking plates; the connecting and fixing device includes a fixing base, a second pin, and a third pin. The fixing base includes a connecting part and docking parts disposed at both ends of the connecting part. The connecting part is slidably connected to the tension sensor through the second pin, and the second pin is clearance-fitted with the tension sensor. The docking part forms a docking groove corresponding to the docking plate. The docking plate is inserted into the docking groove and is detachably fixedly connected to the fixing base through the third pin.

[0013] Optionally, the automatic leveling traction test bench further includes a counterweight device, which is mounted on the main frame of the test bench.

[0014] In this utility model, setting the device under test in the automatic leveling device can level the tension sensor so that the measured traction force is kept in the horizontal direction, effectively ensuring the accuracy of the measurement data, and also avoiding damage to the device under test and the tension sensor caused by excessive angle. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of the automatic leveling traction force test bench in the embodiments of this utility model; Figure 2 This is a schematic diagram of the automatic leveling device, tension sensor, and connecting and fixing device in the embodiments of this utility model; Figure 3 This is a schematic diagram of the main frame of the test bench in an embodiment of this utility model.

[0017] Explanation of icon numbers: 1. Main frame of the test bench; 1.1. Main body of the test bench; 1.1.1. Test area; 1.1.2. Anti-slip strip; 1.2. Side support; 1.3. Reinforcing structure; 1.4. Rib plate; 1.5. Support frame; 2. Automatic leveling device; 2.1. Mounting base; 2.1.1. Base plate; 2.1.2. Support body; 2.1.3. Horizontal plate; 2.1.4. First pin; 2.2. Leveling drive component; 2.3. Tilt sensor; 2.4. Controller; 3. Tension sensor; 4. Connecting and fixing device; 4.1. Fixing base; 4.1.1. Connecting part; 4.1.2. Butt joint; A1. Butt joint groove; 4.2. Second pin; 4.3. Third pin; 5. Counterweight device; 6. Equipment to be tested.

[0018] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0021] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0023] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0024] This invention proposes an automatic leveling traction force test bench, which aims to solve the problem of low accuracy in traction force measurement of existing test equipment.

[0025] like Figure 1As shown, an automatic leveling traction force testing bench includes a main frame 1, an automatic leveling device 2, a tension sensor 3, and a connecting and fixing device 4. The main frame 1 has a test area 1.1.1 for mounting the device under test 6. The automatic leveling device 2 is mounted on the main frame 1. The tension sensor 3 is mounted on the automatic leveling device 2, which levels the tension sensor 3. The tension sensor 3 is connected to the device under test 6 via the connecting and fixing device 4 to detect the traction force of the device under test 6. Placing the device under test 6 on the automatic leveling device 2 levels the tension sensor 3, ensuring the measured traction force is horizontal, making the measured data closer to the actual traction force, effectively guaranteeing the accuracy of the measured data, and avoiding damage to the device under test 6 and the tension sensor 3 caused by excessive angles. Furthermore, the test does not require a large site or multiple devices for traction, resulting in lower costs. Data can be measured directly after installation, making it convenient and efficient. In this embodiment, the device under test 6 is a tunneling and anchoring machine, and the tension sensor 3 is a 200T wireless transmission tension sensor 3. This sensor can measure both tension and pressure, and uses wireless data transmission, so the operator does not need to be close to the test site, increasing the safety of the test. This sensor has both tension and pressure detection functions, and when used with the test bench, it enables the test bench to detect both pressure and tension.

[0026] Among them, see reference Figure 2The automatic leveling device 2 includes a mounting base 2.1, a leveling drive component 2.2, an inclination sensor 2.3, and a controller 2.4. The mounting base 2.1 is detachably mounted on the main frame 1 of the test bench. The leveling drive component 2.2 is mounted on the mounting base 2.1, and its output end is connected to the tension sensor 3. The two ends of the tension sensor 3 are slidably connected to the mounting base 2.1 and the connecting fixing device 4 in the vertical direction, respectively. The two ends of the tension sensor 3 can be deflected up and down relative to the mounting base 2.1 and the connecting fixing device 4, respectively. The inclination sensor 2.3 is mounted on the tension sensor 3 and is used to detect the angle between the tension sensor 3 and the horizontal plane. The controller 2.4 is mounted on the mounting base 2.1 and is electrically connected to the leveling drive component 2.2 and the inclination sensor 2.3, respectively. The leveling drive 2.2 can be a pneumatic cylinder or a servo motor. In this embodiment, the leveling drive 2.2 is a hydraulic cylinder. The first end of the tension sensor 3 can deflect up and down relative to the mounting base 2.1, and the second end of the tension sensor 3 can deflect up and down relative to the connecting fixing device 4. The tilt sensor 2.3 is connected to the tension sensor 3 by bolts and is used to sense the real-time angle between the tension sensor 3 and the horizontal plane. The measured real-time data is then transmitted to the controller 2.4. After data analysis, the controller 2.4 calculates the displacement required by the hydraulic cylinder when the tension sensor 3 is horizontal and transmits the command to the hydraulic cylinder. After receiving the command, the hydraulic cylinder moves axially to drive the tension sensor 3 to deflect until the feedback data from the tilt sensor 2.3 is within the allowable range, that is, the tension sensor 3 is horizontal, and the hydraulic cylinder stops moving. The automatic leveling device 2, through the coordinated work of the tilt sensor 2.3, the controller 2.4, and the leveling drive 2.2, can detect and adjust the horizontal state of the tension sensor 3 in real time, so that the measured traction force is in the horizontal direction, ensuring the accuracy of the measurement data, and also avoiding damage to the equipment and sensor caused by excessive angle.

[0027] Furthermore, the mounting base 2.1 includes a base plate 2.1.1 and a support body 2.1.2. The base plate 2.1.1 is detachably connected to the main frame 1 of the test bench via fasteners. The support body 2.1.2 is mounted on the base plate 2.1.1, and the end of the tension sensor 3 away from the connecting fixing device 4 is slidably mounted on the support body 2.1.2. The mounting base 2.1 is detachably mounted on the main frame 1 of the test bench via the base plate 2.1.1, so as to facilitate the adjustment of the position of the mounting base 2.1 on the main frame 1 of the test bench to adapt to the parking position of the tunneling and anchoring machine.

[0028] Furthermore, the support body 2.1.2 is provided with two horizontal plates 2.1.3 spaced apart in the vertical direction; the mounting base 2.1 also includes a first pin 2.1.4, the two ends of the first pin 2.1.4 are respectively connected to the two horizontal plates 2.1.3, and the end of the tension sensor 3 away from the connecting fixing device 4 is slidably sleeved on the first pin 2.1.4, and the tension sensor 3 and the first pin 2.1.4 are in clearance fit. The tension sensor 3 is provided with an assembly hole, and the first pin 2.1.4 is slidably disposed in the assembly hole and is clearance-fitted with the assembly hole to provide room for the tension sensor 3 to deflect up and down. The tension sensor 3 is connected to the horizontal plate 2.1.3 on the mounting base 2.1 through the first pin 2.1.4 and can slide up and down along the first pin 2.1.4 so as to be leveled under the action of the leveling drive 2.2. After the tension sensor 3 is connected to the anchor boring machine through the connecting fixing device 4, the tension sensor 3 has a slight tilt due to the limitation of the installation structure. The tension sensor 3 can be leveled by adjusting the automatic leveling device 2 so that it can slide up and down.

[0029] See also Figure 3 The main frame 1 of the test bench includes a test bench body 1.1, side supports 1.2, a reinforcing structure 1.3, and stiffeners 1.4. The test bench body 1.1 is provided with a test area 1.1.1, and the test area 1.1.1 is provided with anti-slip strips 1.1.2. Side supports 1.2 are provided on both sides of the test bench body 1.1. The reinforcing structure 1.3 is set on the test bench body 1.1 and is connected to the side supports 1.2 on both sides respectively. Multiple stiffeners 1.4 are provided between the reinforcing structure 1.3 and the test bench body 1.1, as well as between the side supports 1.2 and the test bench body 1.1. In this embodiment, the anti-slip strip 1.1.2 is made of round steel and is used to increase the friction between the main frame 1 of the test bench and the track of the tunneling and anchoring machine, so as to prevent the tunneling and anchoring machine from slipping during the test. Side supports 1.2 are welded on both sides of the main frame 1 of the test bench to increase the rigidity of the main frame 1 of the test bench and prevent the main frame 1 of the test bench from deforming during the test. In this embodiment, the reinforcing structure 1.3 includes a connecting plate and an inclined support plate. The connecting plate is connected between the side supports 1.2 on both sides, and inclined support plates are respectively provided between the two ends of the connecting plate and the side supports 1.2. The inclined support plates form a stable triangular structure between the connecting plate, the connecting plate and the side supports 1.2. Multiple stiffening plates 1.4 are welded between the connecting plate and the main body 1.1 of the test bench and between the side supports 1.2 and the main body 1.1 of the test bench to increase the strength of the main frame 1 of the test bench, prevent the main frame from breaking during the test, and further improve the structural strength of the main frame 1 of the test bench.

[0030] Specifically, the test bench body 1.1 is provided with multiple mounting holes, and the base plate 2.1.1 can be connected to the mounting holes at different positions by fasteners. In this embodiment, the fasteners are bolts, and the base plate 2.1.1 and the test bench body 1.1 are connected and fastened with bolts. This ensures structural strength while also facilitating the assembly and disassembly of the mounting base 2.1 on the test bench body 1.1. Multiple sets of mounting holes are distributed on the test bench body 1.1, allowing for the selection of appropriate mounting holes based on the location where the tunneling and anchoring machine is parked, thus ensuring alignment between the tunneling and anchoring machine and the test bench body 1.1.

[0031] Furthermore, the device under test 6 is provided with two symmetrically arranged docking plates; the connecting and fixing device 4 includes a fixing base 4.1, a second pin 4.2, and a third pin 4.3. The fixing base 4.1 includes a connecting part 4.1.1 and docking parts 4.1.2 disposed at both ends of the connecting part 4.1.1. The connecting part 4.1.1 is slidably connected to the tension sensor 3 through the second pin 4.2, and the second pin 4.2 is clearance-fitted with the tension sensor 3; the docking part 4.1.2 forms a docking groove A1 corresponding to the docking plate. The docking plate is inserted into the docking groove A1 and is detachably fixedly connected to the fixing base 4.1 through the third pin 4.3. Both ends of the tension sensor 3 are provided with mounting holes. The second pin 4.2 is slidably disposed in the mounting holes and is clearance-fitted with the mounting holes to provide space for the tension sensor 3 to deflect vertically relative to the connecting and fixing device 4. The connecting and fixing device 4 is assembled to the rear of the roadheader chassis using a pin connection. Since the pre-installed docking plates on the roadheader may have varying heights, the docking groove A1 on the connecting and fixing device 4 has reserved space in both height and direction to accommodate different interface heights. This allows the tension sensor 3 to be adjusted in height along the axial direction of the pin, increasing the versatility of the test bench. In this embodiment, the second pin 4.2 is detachably connected to the connecting part 4.1.1.

[0032] In addition, the automatic leveling traction force test bench also includes a counterweight device 5, which is mounted on the main frame 1 of the test bench. In this embodiment, the counterweight device 5 includes multiple counterweight blocks, and a support frame 1.5 is added to the front end of the main frame 1 of the test bench to hold the counterweight blocks and prevent the main frame from tilting during the experiment. Operators can adjust the weight of the counterweight blocks according to the magnitude of the traction force to avoid displacement and deformation of the test bench caused by excessive tension or pressure during the test, thereby increasing the safety of the test.

[0033] In this embodiment, the operation steps of the automatic leveling traction force test bench are as follows: ① Place the counterweight device 5 at the front end of the main frame 1 of the test bench; ②Use the third pin 4.3 to assemble the fixed seat 4.1 with the matching mounting holes on the anchoring plate of the tunneling machine; ③ Connect the rear end of the tension sensor 3 to the fixed base 4.1 using the second pin 4.2; ④ Connect the mounting base 2.1 to the test bench body 1.1 using bolts; ⑤ Connect the front end of the tension sensor 3 to the mounting base 2.1 using the first pin 2.1.4; ⑥ Use bolts to attach the tilt sensor 2.3 to the upper part of the tension sensor 3; ⑦ Connect the controller 2.4, hydraulic cylinder and tilt sensor 2.3 related circuits, and place the hydraulic cylinder below the tension sensor 3 to level the sensor; ⑧ The tilt sensor 2.3 measures the tilt angle of the tension sensor 3, the controller 2.4 analyzes the data, determines the direction and magnitude of adjustment, drives the hydraulic cylinder to lift and lower to the corresponding support point, and after the adjustment is completed, the tilt sensor 2.3 continues to feed back data, and the adjustment is repeated until the target threshold is reached; ⑨ After the tension sensor 3 is horizontal, the roadheader's tension or compression sensor is activated to obtain the tension or compression force, which is the roadheader's traction force. The above description is only a preferred embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model, utilizing the content of this utility model's specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. An automatic leveling traction force testing bench, characterized in that, The test bench includes a main frame (1), an automatic leveling device (2), a tension sensor (3), and a connecting and fixing device (4). The main frame (1) of the test bench is provided with a test area (1.1.1) for the device under test (6). The automatic leveling device (2) is set on the main frame (1) of the test bench. The tension sensor (3) is set on the automatic leveling device (2). The automatic leveling device (2) can level the tension sensor (3). The tension sensor (3) is connected to the device under test (6) through the connecting and fixing device (4) and is used to detect the traction force of the device under test (6).

2. The automatic leveling traction force test bench as described in claim 1, characterized in that, The automatic leveling device (2) includes a mounting base (2.1), a leveling drive (2.2), a tilt sensor (2.3), and a controller (2.4). The mounting base (2.1) is detachably mounted on the main frame (1) of the test bench. The leveling drive (2.2) is mounted on the mounting base (2.1), and its output end is connected to the tension sensor (3). Both ends of the tension sensor (3) are connected to the mounting base (2.1) and the connecting and fixing device (2.4), respectively. 4) The connection is slidable in the vertical direction, and the two ends of the tension sensor (3) can be deflected up and down relative to the mounting base (2.1) and the connecting fixing device (4) respectively; the tilt sensor (2.3) is set on the tension sensor (3) and is used to detect the angle between the tension sensor (3) and the horizontal plane; the controller (2.4) is set on the mounting base (2.1) and is electrically connected to the leveling drive (2.2) and the tilt sensor (2.3) respectively.

3. The automatic leveling traction force test bench as described in claim 2, characterized in that, The mounting base (2.1) includes a base plate (2.1.1) and a support body (2.1.2). The base plate (2.1.1) is connected to the main frame (1) of the test bench by fasteners. The support body (2.1.2) is disposed on the base plate (2.1.1). The end of the tension sensor (3) away from the connecting and fixing device (4) is slidably disposed on the support body (2.1.2).

4. The automatic leveling traction force test bench as described in claim 3, characterized in that, The support body (2.1.2) is provided with two horizontal plates (2.1.3) spaced apart in the vertical direction; the mounting base (2.1) also includes a first pin (2.1.4), the two ends of the first pin (2.1.4) are respectively connected to the two horizontal plates (2.1.3), the end of the tension sensor (3) away from the connecting fixing device (4) is slidably sleeved on the first pin (2.1.4), and the tension sensor (3) and the first pin (2.1.4) are clearance-fitted.

5. The automatic leveling traction force test bench as described in claim 4, characterized in that, The main frame (1) of the test bench includes a test bench body (1.1), side supports (1.2), a reinforcing structure (1.3), and stiffeners (1.4). The test bench body (1.1) is provided with the test area (1.1.1), and the test area (1.1.1) is provided with anti-slip strips (1.1.2). The side supports (1.2) are provided on both sides of the test bench body (1.1). The reinforcing structure (1.3) is provided on the test bench body (1.1) and is connected to the side supports (1.2) on both sides respectively. Multiple stiffeners (1.4) are provided between the reinforcing structure (1.3) and the test bench body (1.1) and between the side supports (1.2) and the test bench body (1.1).

6. The automatic leveling traction force test bench as described in claim 5, characterized in that, The test bench body (1.1) is provided with multiple mounting holes, and the base plate (2.1.1) can be connected to the mounting holes at different positions by fasteners.

7. The automatic leveling traction force test bench as described in any one of claims 1 to 6, characterized in that, The device under test (6) is provided with two symmetrically arranged docking plates; the connecting and fixing device (4) includes a fixing seat (4.1), a second pin (4.2) and a third pin (4.3). The fixing seat (4.1) includes a connecting part (4.1.1) and docking parts (4.1.2) arranged at both ends of the connecting part (4.1.1). The connecting part (4.1.1) is slidably connected to the tension sensor (3) through the second pin (4.2), and the second pin (4.2) is clearance-fitted with the tension sensor (3). The docking part (4.1.2) forms a docking groove (A1) corresponding to the docking plate. The docking plate is inserted into the docking groove (A1) and is detachably fixedly connected to the fixing seat (4.1) through the third pin (4.3).

8. The automatic leveling traction force test bench as described in any one of claims 1 to 6, characterized in that, The automatic leveling traction test bench also includes a counterweight device (5), which is mounted on the main frame (1) of the test bench.

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