Special impact wrench detection device for railway

Abstract

The utility model discloses a railway special-purpose impact wrench detection apparatus, comprising a support, a torque sensor, a first connecting piece, a second connecting piece and a display instrument, the support is provided with a steel rail, the steel rail is fixed on the support through a bolt and a track fastener, the torque sensor is installed on the support and is located above the bolt, and the display instrument is installed on the support. An input shaft of the torque sensor is connected with the first connecting piece and used for connecting the impact wrench, an output shaft is connected with the second connecting piece, a sleeve is arranged at the bottom of the second connecting piece and used for connecting a bolt and driving the bolt to rotate so as to loosen and tighten the rail fastener, and the displayer is connected with the torque sensor and used for displaying detection data of the torque sensor. The whole detection process of the device is carried out under the real-time operation condition of the impact wrench, the precise detection effect can be achieved, the device has the advantages of being high in detection precision, good in stability and high in anti-interference performance, the impact wrench can be debugged through detection data, the requirement of a fastener system is met, and railway driving safety is ensured.

Description

Technical Field

[0001] This utility model relates to the field of wrench testing technology, specifically to a railway-specific impact wrench testing device. Background Technology

[0002] Railway-specific (diesel and lithium-ion battery) impact wrenches are commonly used tools in railway track maintenance and repair work. The main function of an impact wrench is to provide the torque required for railway fastening systems, used to tighten or loosen threaded connections such as bolts and nuts that require the appropriate torque. The quality of the impact wrench directly affects the quality of railway maintenance work and ultimately, railway traffic safety.

[0003] Currently, various types of impact wrenches are widely used on both conventional and high-speed railways, ballastless and ballasted lines, and turnouts. After a period of use, impact wrenches may exhibit the following abnormal behaviors: 1. The torque, power, rotation speed, and rail fastener clearance parameters of the impact wrench are higher than the parameters output for the corresponding setting, resulting in insufficient rail fastener clearance and severe deformation of the spring clip, causing damage to railway fasteners and increasing railway maintenance and operation costs. 2. The torque, power, rotation speed, and rail fastener clearance parameters of the impact wrench are lower than the parameters output for the corresponding setting, resulting in insufficient fastening pressure in the railway fastener system, seriously affecting the quality of railway maintenance and traffic safety.

[0004] The inability to accurately control the output torque and power of the impact wrench can lead to the rail bolts not meeting the requirements of the fastening system, which seriously affects train operation safety. Currently, there is no testing equipment for railway-specific (diesel and lithium battery) impact wrenches to test and debug them before they are put into use. Utility Model Content

[0005] To address the aforementioned issues, this utility model provides a railway-specific impact wrench testing device. It uses a simulated impact wrench tightening or loosening method to determine whether the impact wrench meets the tightening requirements of the railway fastening system, thereby ensuring the quality of railway maintenance.

[0006] Specifically, this utility model is implemented as follows:

[0007] A railway-specific impact wrench testing device includes:

[0008] Torque sensor;

[0009] A bracket is provided with a steel rail, which is fixed to the bracket by bolts and rail fasteners. The torque sensor is installed on the bracket and located above the bolts.

[0010] The first connector is connected to the input shaft of the torque sensor and is used to connect the impact wrench;

[0011] The second connector is connected to the output shaft of the torque sensor, and a sleeve is provided at its bottom for connecting the bolt.

[0012] A display device is connected to the torque sensor and is used to display the torque sensor detection data.

[0013] Furthermore, the support includes:

[0014] Base plate, used for mounting steel rails;

[0015] A vertical plate is fixedly connected to the base plate to form an L-shaped structure, and the torque sensor is mounted on the vertical plate.

[0016] Furthermore, the torque sensor is configured to be positionally adjustable along the height direction of the vertical plate.

[0017] Furthermore, the vertical plate is provided with a vertical waist-shaped hole, and the torque sensor is provided with a mounting plate on the side near the vertical plate, the mounting plate being connected to the vertical waist-shaped hole.

[0018] Furthermore, a rubber pad is provided on the base plate, and the rail is placed on the rubber pad; gauge blocks are provided on both sides of the rail;

[0019] An iron pad is provided on the side of the gauge block away from the rubber pad. In use, the track fastener is located above the gauge block and the iron pad, and the bolt passes through the track fastener and connects to the iron pad.

[0020] Furthermore, the first connector includes:

[0021] Wrench connector for connecting an impact wrench;

[0022] The input section is keyed to the input shaft of the torque sensor.

[0023] Furthermore, the second connector includes:

[0024] The output section is keyed to the output shaft of the torque sensor;

[0025] The sleeve connection part is provided with a square shaft, which is used to connect the sleeve.

[0026] Furthermore, a standing platform is provided on the side of the vertical plate away from the base plate, and the standing platform is used for testing personnel to stand on.

[0027] Furthermore, the railway-specific impact wrench testing device also includes:

[0028] The power supply is connected to the display.

[0029] The working principle of this utility model:

[0030] When tightening the track fastener 65, first connect the first connecting piece 3 and the second connecting piece 4 to the torque sensor 2 respectively. Then adjust the height of the torque sensor 2 so that the sleeve 5 fits over the nut of the track fastener 65. Next, connect the output end of the impact wrench 9 to the first connecting piece 3, turn on the display 7, turn on the impact wrench 9, and rotate the sleeve 5 to tighten the nut of the track fastener 65, causing it to move down and press the track fastener 65. After tightening, use a feeler gauge to measure whether the gap of the track fastener 65 meets the standard. The torque, power, and rotation speed of the impact wrench 9 are measured by the torque sensor 2. The torque sensor 2 uses strain gauge electrical measurement technology, forming a strain bridge on the elastic shaft. Providing power to the strain bridge can measure the electrical signal of the elastic shaft under torsion. After amplifying the strain signal, it is converted into a frequency signal proportional to the torsional strain through voltage / frequency conversion. Through optical coupling and corresponding processing circuits, the rotation speed signal is converted into a pulse signal output, with 60 pulses output for each rotation of the rotating equipment.

[0031] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0032] The railway-specific impact wrench testing device provided by this utility model conducts the entire testing process under the real-time operation of the impact wrench, achieving accurate testing results and ensuring the authenticity of the test data. It features high testing accuracy, good stability, and strong anti-interference capabilities. The test data can be used to adjust the impact wrench so that its performance meets the requirements of the fastening system, thereby ensuring railway traffic safety. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the railway-specific impact wrench detection device in Example 1;

[0034] Figure 2 This is a schematic diagram of the railway-specific impact wrench detection device in Example 1;

[0035] Figure 3 This is an exploded view of the support structure in Example 1;

[0036] Figure 4 This is a schematic diagram of the connection between the vertical plate and the torque sensor in Example 1;

[0037] Figure 5 This is an exploded view of the first connector, torque sensor, and second connector in Example 1.

[0038] Figure label:

[0039] 1-Bracket; 11-Base plate; 12-Vertical plate; 13-Vertical waist-shaped hole; 14-Standing platform; 2-Torque sensor; 21-Mounting plate; 3-First connector; 31-Wrench connector; 32-Input part; 4-Second connector; 41-Output part; 42-Sleeve connector; 5-Sleeve; 61-Rubber pad; 62-Rail; 63-Gap block; 64-Iron pad plate; 65-Rail fastener; 66-Bolt; 7-Display instrument; 8-Power supply; 9-Impact wrench. Detailed Implementation

[0040] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0041] Example 1

[0042] like Figure 1-3 As shown, this embodiment provides a railway-specific impact wrench testing device for daily performance testing of internal combustion impact wrenches and lithium-ion battery impact wrenches used in various engineering stations, workshops, and work groups. It can also be used by manufacturers of internal combustion and lithium-ion battery impact wrenches to test and inspect the assembly and debugging of impact wrenches. This railway-specific impact wrench testing device includes: a bracket 1, a rail 62, a torque sensor 2, a display instrument 7, and a power supply 8. The bracket 1 consists of a base plate 11, a vertical plate 12, and a standing platform 14. The base plate 11 is placed on the ground and used to install the rail 62 and its rail fastening system. The vertical plate 12 is fixedly connected to the base plate 11 by bolts, forming an L-shaped bracket located on the side of the standing platform 14 away from the base plate 11. Its overall shape is "┌", providing a standing space for the operator to operate the impact wrench 9.

[0043] like Figure 3 As shown, the rail 62 is fixed by a rail fastening system, which includes: rubber pads 61, gauge blocks 63, iron pads 64, rail fasteners 65, and bolts 66. The rubber pads 61 are located on the base plate 11 to support the rail 62. The gauge blocks 63 are located on both sides of the bottom of the rail 62, and the iron pads 64 are located on the side of the gauge blocks 63 away from the rail 62. The distance between the rail 62 and the iron pads 64 can be adjusted using the gauge blocks 63 to simulate the distance between the rail 62 and the sleeper under real-world conditions. Above the gauge blocks 63 and the iron pads 64 is the rail fastener 65, which is tightened by bolts 66. While the impact wrench 9 tightens the nut of the bolt 66, the torque sensor 2 detects the parameters of the impact wrench 9 during tightening, thus detecting the parameters of the impact wrench 9 under real-time operation, achieving accurate detection and ensuring the authenticity of the detection data.

[0044] like Figure 4As shown, the torque sensor 2 is mounted on the vertical plate 12 via a mounting plate 21. A vertical oblong hole 13 is provided at a corresponding position on the vertical plate 12. The mounting plate 21 and the vertical oblong hole 13 are connected by bolts, allowing adjustment of the height of the mounting plate 21 and the torque sensor 2 through the vertical oblong hole 13. The torque sensor 2 is connected to the display instrument 7, and the power supply 8 provides power to both the torque sensor 2 and the display instrument 7. The torque sensor 2 employs strain gauge electrical measurement technology, forming a strain bridge on the elastic shaft. Providing power to the strain bridge allows for the measurement of the electrical signal of the elastic shaft under torsion. After amplification, the strain signal is converted into a frequency signal proportional to the torsional strain through a voltage-to-frequency converter. Through optical coupling and corresponding processing circuitry, the rotational speed signal is converted into a pulse signal output, with 60 pulses output for each revolution of the rotating equipment. It should be noted that the above-mentioned strain gauge electrical measurement technology is a basic extension of dynamic torque sensor. This application does not involve any improvement to its methods or algorithms. In this embodiment, the torque sensor 2 is a commercially available ZN-DNJ torque sensor, which can detect performance in forward / reverse and dynamic / static modes, and can continuously measure multiple impact wrenches with a torque measurement range of 0-3000 Nm.

[0045] like Figure 5 As shown, the upper end of the torque sensor 2 is the input shaft and the lower end is the output shaft. The input shaft is connected to the output end of the impact wrench 9 through the first connector 3. The output shaft is connected to the sleeve 5 through the second connector 4. The sleeve 5 is then connected to the nut of the bolt 66. Through the transmission of the first connector 3, the torque sensor 2, the second connector 4 and the sleeve 5, the rotation of the nut is realized, thereby realizing the tightening and loosening of the bolt 66.

[0046] The first connector 3 includes a wrench connector 31 and an input connector 32, with the wrench connector 31 on top and the input connector 32 on the bottom. The upper part of the wrench connector 31 has an opening to mate with the output shaft of the impact wrench 9, and the lower part of the input connector 32 is connected to the input shaft of the torque sensor 2 via a key. The second connector 4 includes an output connector 41 and a sleeve connector 42, with the output connector 41 on top and the sleeve connector 42 on the bottom. The output connector 41 is connected to the output shaft of the torque sensor 2 via a key, and the lower part of the sleeve connector 42 is a square shaft 43, through which the sleeve 5 is connected.

[0047] When tightening the track fastener 65, first connect the first connecting piece 3 and the second connecting piece 4 to the torque sensor 2 respectively. Then adjust the height of the torque sensor 2 so that the sleeve 5 fits over the nut of the bolt 66. Then, the operator stands on the standing platform 14, aligns the output end of the impact wrench 9 with the wrench connection part 31, and then turns on the impact wrench 9 to rotate the sleeve 5, causing the nut of the bolt 66 to move down and tighten the track fastener 65. After tightening, use a feeler gauge to measure whether the gap of the track fastener 65 meets the standard. During the tightening process, the torque, power, and rotation speed of the impact wrench 9 are measured by the torque sensor 2 and then displayed on the display instrument 7.

[0048] The above-described specific examples are for illustrative purposes only and are not intended to limit the scope of this invention. Those skilled in the art to which this invention pertains can make various simple deductions, modifications, or substitutions based on the concept of this invention.

Claims

1. A railway-specific impact wrench testing device, comprising: The torque sensor (2) is characterized in that it further includes: A bracket (1) is provided with a steel rail (62), which is fixed to the bracket (1) by bolts (66) and rail fasteners (65). The torque sensor (2) is installed on the bracket (1) and located above the bolts (66). The first connector (3) is connected to the input shaft of the torque sensor (2) and is used to connect the impact wrench (9); The second connector (4) is connected to the output shaft of the torque sensor (2), and a sleeve (5) is provided at its bottom. The sleeve (5) is used to connect the bolt (66). The display (7) is connected to the torque sensor (2) and is used to display the detection data of the torque sensor (2).

2. The railway-specific impact wrench testing device as described in claim 1, characterized in that, The support (1) includes: Base plate (1), used for mounting rails (62); The vertical plate (12) is fixedly connected to the base plate (11) to form an L-shaped structure, and the torque sensor (2) is installed on the vertical plate (12).

3. The railway-specific impact wrench testing device as described in claim 2, characterized in that, The torque sensor (2) is configured to be position-adjustable along the height direction of the vertical plate (12).

4. The railway-specific impact wrench testing device as described in claim 3, characterized in that, The vertical plate (12) is provided with a vertical waist-shaped hole (13), and the torque sensor (2) is provided with a mounting plate (21) on the side near the vertical plate (12), and the mounting plate (21) is connected to the vertical waist-shaped hole (13).

5. The railway-specific impact wrench testing device as described in claim 2, characterized in that, A rubber pad (61) is provided on the base plate (11), and the rail (62) is placed on the rubber pad (61); gauge blocks (63) are provided on both sides of the rail (62); The gauge block (63) is provided with an iron pad (64) on the side away from the rubber pad (61). In use, the track fastener (65) is located above the gauge block (63) and the iron pad (64), and the bolt (66) passes through the track fastener (65) and connects to the iron pad (64).

6. The railway-specific impact wrench testing device as described in claim 1, characterized in that, The first connector (3) includes: Wrench connector (31) for connecting an impact wrench (9); The input section (32) is keyed to the input shaft of the torque sensor (2).

7. The railway-specific impact wrench testing device as described in claim 1, characterized in that, The second connector (4) includes: The output section (41) is keyed to the output shaft of the torque sensor (2); The sleeve connecting part (42) is provided with a square shaft (43), which is used to connect the sleeve (5).

8. The railway-specific impact wrench testing device as described in claim 2, characterized in that, A standing platform (14) is provided on the side of the vertical plate (12) away from the base plate (11), and the standing platform (14) is used for the testing personnel to stand on.

9. The railway-specific impact wrench testing device as described in claim 1, characterized in that, Also includes: The power supply (8) is connected to the display (7).

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