A sprocket wear detection tool

Abstract

The utility model discloses a chain wheel abrasion detection tool belongs to the mining scraper conveyor chain wheel abrasion detection technical field, including longitudinal locating block, the lateral width of longitudinal locating block is with the interval adaptation between the axially adjacent gear tooth on the chain wheel piece, and longitudinal locating block is along the lateral symmetry setting and is used for measuring the lateral detection rod of wheel groove lateral interval, and is along the longitudinal symmetry setting and is used for measuring the longitudinal detection rod of wheel groove longitudinal interval, the lateral detection rod and longitudinal detection rod are respectively with the sliding fit of longitudinal locating block, longitudinal locating rod is equipped with first lug for the contact tooth groove upper edge, and the lateral detection rod is equipped with second lug for the contact tooth groove upper edge. The utility model discloses through longitudinal detection rod and lateral detection rod respectively drive first lug and second lug accurate detection to tooth groove upper edge position, help to promote the detection accuracy, and convenient quick, accurate reading wear data simultaneously.

Description

Technical Field

[0001] This utility model belongs to the field of sprocket wear detection technology for mining scraper conveyors, and specifically relates to a sprocket wear detection tool. Background Technology

[0002] In coal mine production, scraper conveyors are the core equipment for coal transportation, and their operational stability directly affects mine production efficiency and operational safety. The transmission system of this equipment mainly consists of sprockets and scraper chains. The sprocket assembly contains multiple sets of coaxially arranged sprocket plates with teeth evenly distributed circumferentially. Axially adjacent teeth and circumferentially adjacent teeth cooperate to form grooves for meshing with the scraper chain. The chain links of the scraper chain need to be precisely embedded in the grooves to achieve power transmission, while the connecting rings are correspondingly embedded in the gaps between axially adjacent teeth. At the same time, the grooves between circumferentially adjacent teeth of the sprocket plates also need to provide space for the scraper to ensure that the scraper runs smoothly with the chain.

[0003] However, due to the complex working conditions underground, the sprocket teeth are prone to wear and deformation. If not addressed in time, this can lead to derailment, jamming, or even breakage of the scraper chain, causing equipment downtime or safety accidents. Therefore, scraper conveyors need to be shut down periodically to disassemble the sprockets and inspect the wear condition of the teeth to determine whether the sprockets need repair or replacement.

[0004] Currently, gear tooth wear detection relies on visual inspection by personnel, lacking standardized testing criteria and quantifiable indicators. This leads to two problems: firstly, it heavily depends on the experience of the inspectors, as different personnel may use different standards, increasing the risk of misjudgment. For example, a sprocket that is still usable might be judged as "needing replacement," resulting in wasted equipment costs for the company; secondly, a sprocket that needs replacement might be misjudged as "repairable," leading to serious malfunctions due to tooth meshing failure after being put back into use, increasing maintenance costs and posing a significant threat to downhole safety.

[0005] A search revealed existing technologies for detecting sprocket wear. For example, Chinese utility model patent (CN214666568U) describes a novel mining sprocket chain wear detection and measurement device. This patent designs a first detection claw, a second detection claw, a third detection claw, and a fourth detection claw that are adapted to the chain wear. Each detection claw is connected by a measuring ruler. During detection, the detection claws are embedded in the chain wear, and the distance between the detection claws is read by the measuring ruler.

[0006] During the operation of scraper conveyors, the wear on the gear teeth is mainly concentrated at the point where the chain link separates from the tooth groove, specifically the upper edge of the tooth groove, which is the upper edge of the chain groove. However, once the detection claw is fully embedded, it is confined to the bottom of the chain groove and cannot move towards the wear area. Consequently, the measuring ruler cannot accurately measure the distance; the only way to measure it is by observation or using an external measuring ruler, making the inspection cumbersome and preventing quick readings.

[0007] For the reasons mentioned above, we propose a sprocket wear detection tool. Utility Model Content

[0008] The purpose of this utility model is to provide a sprocket wear detection tool, which aims to solve the problems existing in the prior art mentioned above.

[0009] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A sprocket wear detection tool includes a longitudinal positioning block. The lateral width of the longitudinal positioning block is adapted to the spacing between axially adjacent teeth on the sprocket. The longitudinal positioning block is symmetrically arranged with lateral detection rods for measuring the lateral spacing of the tooth grooves and longitudinal detection rods for measuring the longitudinal spacing of the tooth grooves. The lateral detection rods and longitudinal detection rods are slidably engaged with the longitudinal positioning block. The longitudinal detection rods are provided with a first protrusion for contacting the longitudinal upper edge of the tooth groove, and the lateral detection rods are provided with a second protrusion for contacting the lateral upper edge of the tooth groove.

[0010] Furthermore, the bottom of the longitudinal positioning block is provided with a transverse positioning seat, which is adapted to the groove between adjacent teeth on the sprocket along the circumferential direction.

[0011] Furthermore, the longitudinal end face of the longitudinal positioning block is provided with a longitudinal groove, the longitudinal detection rod slides through the longitudinal groove, the end of the longitudinal detection rod is vertically connected to a limiting plate, the limiting plate extends laterally to the outside of the longitudinal positioning block, and the first protrusion is disposed on the limiting plate.

[0012] Furthermore, the longitudinal positioning block has an extension on its transverse sidewall, and the extension has a transverse groove, through which the transverse detection rod slides.

[0013] Furthermore, the top surface of the longitudinal positioning block is provided with a first elongated hole corresponding to the longitudinal slide groove, the longitudinal detection rod is provided with a first threaded rod extending through the first elongated hole, the top surface of the extension is provided with a second elongated hole corresponding to the transverse slide groove, the transverse detection rod is provided with a second threaded rod extending through the second elongated hole, and both the first threaded rod and the second threaded rod are threadedly connected with locking nuts.

[0014] Furthermore, the surfaces of the longitudinal and transverse detection rods are provided with length scale lines.

[0015] Furthermore, two sets of longitudinal positioning blocks are spaced apart on the transverse positioning seat, and the transverse positioning seat is equipped with a hand handle.

[0016] Compared with the shortcomings and deficiencies of existing technologies, this utility model has the following beneficial effects: This invention provides a sprocket wear detection tool. Using 0.1mm precision scale lines on the surfaces of the longitudinal and transverse detection rods, combined with the precise fit of the first and second protrusions with the sprocket groove, the wear amount in the longitudinal and transverse directions of the groove can be directly quantified. Furthermore, the preset spacing between the first and second protrusions is consistent with the sprocket design parameters, providing a unified benchmark for wear judgment. Compared to the detection claws in existing technologies, the longitudinal and transverse detection rods respectively drive the first and second protrusions to accurately detect the upper edge of the tooth groove, which helps improve detection accuracy and facilitates quick and accurate reading of wear data.

[0017] In this invention, by adapting the transverse positioning seat to the circumferential groove of the sprocket and the longitudinal positioning block to the axial tooth spacing, dual reference positioning of the circumference and axis can be quickly completed, which helps to improve the reliability of the test. At the same time, the transverse positioning seat is provided with two sets of longitudinal positioning blocks, which can simultaneously test two sets of coaxially arranged sprockets, which helps to improve the test efficiency. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the sprocket wear detection tool of this utility model.

[0019] Figure 2 This is a schematic diagram of the structure of the transverse positioning seat with two sets of longitudinal positioning blocks in this utility model.

[0020] Figure 3 yes Figure 2 A magnified schematic diagram of the structure at point A in the middle.

[0021] Figure 4 This is a schematic diagram of the connection structure between the handheld lever and the horizontal positioning seat in this utility model.

[0022] In the diagram: 10. Longitudinal positioning block; 11. Longitudinal slide groove; 12. Extension; 13. Transverse slide groove; 20. Longitudinal detection unit; 21. Longitudinal detection rod; 22. Limiting plate; 23. First protrusion; 24. First threaded rod; 30. Transverse detection unit; 31. Transverse detection rod; 32. Second protrusion; 33. Second threaded rod; 40. Transverse positioning seat; 50. Handheld rod; 60. Locking nut; 71. Sprocket piece; 72. Gear tooth; 73. Gear groove. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] Reference Figure 1 This utility model discloses a sprocket wear detection tool for quantitative detection of wear on sprockets of mining scraper conveyors, including a positioning component and a detection component.

[0025] Reference Figure 2 and Figure 4 The positioning assembly includes a transverse positioning seat 40, a longitudinal positioning block 10, and a handheld lever 50. The bottom contour of the transverse positioning seat 40 is adapted to the groove between adjacent teeth 71 in the circumferential direction on the sprocket. The longitudinal positioning block 10 is fixed to the top of the transverse positioning seat 40, and its transverse width is consistent with the spacing between adjacent teeth 71 in the axial direction on the sprocket, thereby further restricting the axial displacement of the inspection tool and precisely positioning the longitudinal positioning block 10 to the center of the groove 72. The handheld lever 50 is welded to the middle of the transverse positioning seat 40, facilitating a stable grip on the tool by the inspection personnel.

[0026] Reference Figure 1 and Figure 3 The detection assembly includes a longitudinal detection unit 20 and a transverse detection unit 30. Two sets of longitudinal detection units 20 are symmetrically arranged at both ends of the longitudinal positioning block 10, and two sets of transverse detection units 30 are symmetrically arranged on both sides of the transverse positioning block 10.

[0027] The longitudinal detection unit 20 includes a longitudinal detection rod 21 and a limiting plate 22 that are vertically connected and L-shaped. A longitudinal groove 11 is provided on the longitudinal end face of the longitudinal positioning block 10. The longitudinal detection rod 21 slides through the longitudinal groove 11 and can move longitudinally. The limiting plate 22 is welded to one end of the longitudinal detection rod 21 and extends laterally to the outside of the longitudinal positioning block 10. A first protrusion 23 is provided on the side of the limiting plate 22 facing the wheel groove 72, and the first protrusion 23 is used to contact the longitudinal upper edge of the wheel groove 72. A first elongated hole communicating with the longitudinal groove 11 is provided on the top surface of the longitudinal positioning block 10. A first threaded rod 24 is fixedly connected to the top surface of the longitudinal detection rod 21. The first threaded rod 24 passes through the first elongated hole and is perpendicular to the top surface of the longitudinal positioning block 10. A locking nut 60 is threaded onto the first threaded rod 24. Tightening the locking nut 60 to make it abut against the top surface of the longitudinal positioning block 10 fixes the position of the longitudinal detection rod 21.

[0028] The transverse detection unit 30 includes a transverse detection rod 31. An extension 12 is fixedly connected to the transverse sidewall of the longitudinal positioning block 10. A transverse groove 13 is opened on the end face of the extension 12 along the transverse direction. The transverse detection rod 31 slides through the transverse groove 13 and can move laterally. A second protrusion 32 is provided at the end of the transverse detection rod 31 facing the wheel groove 72. The second protrusion 32 is used to contact the upper transverse edge of the wheel groove 72. A second elongated hole communicating with the transverse groove 13 is opened on the top surface of the extension 12. A second threaded rod 33 is fixedly connected to the top surface of the transverse detection rod 31. The second threaded rod 33 passes through the second elongated hole. The second threaded rod 33 is perpendicular to the top surface of the extension 12 and is threadedly connected to a locking nut 60. Tightening the locking nut 60 to make it abut against the top surface of the extension 12 can fix the position of the transverse detection rod 31.

[0029] Both the longitudinal detection rod 21 and the transverse detection rod 31 have length scale lines with an accuracy of 0.1 mm engraved on their surfaces, making it easy to read the measurement values.

[0030] In one embodiment, two sets of longitudinal positioning blocks 10 are spaced apart on the top surface of the transverse positioning seat 40, facilitating a single inspection of the wear condition of two parallel sets of wheel grooves 72 and improving inspection efficiency. The longitudinal positioning blocks 10 are welded to the transverse positioning seat 40. The handheld lever 50 is located between the two sets of longitudinal positioning blocks 10.

[0031] When using this sprocket wear detection tool: First, the inspector holds the handle 50 and aligns the transverse positioning seat 40 with the groove between adjacent teeth 71 in the circumferential direction on the sprocket plate, slowly inserting it until the bottom surface of the transverse positioning seat 40 is completely in contact with the bottom surface of the groove. During this process, the transverse sides of the longitudinal positioning block 10 need to be observed simultaneously to ensure that it is in contact with the side of the adjacent teeth 71 in the axial direction on the sprocket plate without obvious gaps. This completes the dual reference positioning of the inspection tool in the "circumferential direction" and "axial direction" to prevent errors caused by positioning offset in subsequent inspections.

[0032] It should be noted that when the tool is not in use, the distance between the two sets of first protrusions 23 located on the same longitudinal line is preset to the longitudinal standard length of the corresponding model sprocket groove 72; the distance between the two sets of second protrusions 32 located on the same transverse line is preset to the transverse standard length of the groove 72. This preset value is consistent with the sprocket design parameters and provides a benchmark for subsequent wear calculation.

[0033] Next, loosen the locking nut 60 corresponding to the top of the longitudinal detection rod 21 to release the fixation restriction on the longitudinal detection rod 21; (refer to...) Figure 2Then, push the longitudinal detection rod 21 along the longitudinal groove 11, causing the limiting plate 22 to move synchronously until the first protrusion 23 on the limiting plate 22 is in close contact with the upper edge (point a or point a') of the wheel groove 72 on both sides of the longitudinal direction; tighten the locking nut 60 so that the bottom surface of the nut abuts against the top surface of the longitudinal positioning block 10, fixing the position of the longitudinal detection rod 21; read the scale value on the surface of the longitudinal detection rod 21, and take the sum of the extension distances of the two sets of longitudinal detection rods 21 located on the same straight line. This value is the actual wear amount on one side of the longitudinal direction of the wheel groove 72.

[0034] Then, first loosen the locking nut 60 corresponding to the top of the transverse detection rod 31, and push the transverse detection rod 31 along the transverse slide 13 so that the second protrusion 32 at the end of the rod is in close contact with the upper edge (point b or point b') of the wheel groove 72 on both sides of the transverse side; then tighten the locking nut 60 to fix the position of the transverse detection rod 31; read the scale value on the surface of the transverse detection rod 31, and take the sum of the extension distances of the two sets of transverse detection rods 31 located on the same straight line, which is the actual wear amount on one side of the transverse side of the wheel groove 72.

[0035] Finally, the evenly distributed grooves 72 on the sprocket are inspected. After all points are inspected, the longitudinal and lateral wear of each groove 72 are compared with the preset replacement standard values ​​for the sprocket. If the wear of any groove 72 exceeds the standard value, the sprocket needs to be replaced immediately. If the wear of all grooves 72 is within the standard value range, the sprocket can be put into use after routine maintenance, and the test data is recorded as a comparison benchmark for the next test.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sprocket wear detection tool characterized by, The sprocket includes a longitudinal positioning block (10), the lateral width of which is adapted to the spacing between adjacent teeth on the sprocket. The longitudinal positioning block (10) is symmetrically arranged with a lateral detection rod (31) for measuring the lateral spacing of the tooth groove and a longitudinal detection rod (21) for measuring the longitudinal spacing of the tooth groove. The lateral detection rod (31) and the longitudinal detection rod (21) are slidably engaged with the longitudinal positioning block (10). The longitudinal detection rod (21) is provided with a first protrusion (23) for contacting the upper edge of the tooth groove, and the lateral detection rod (31) is provided with a second protrusion (32) for contacting the upper edge of the tooth groove.

2. The sprocket wear detection tool of claim 1, wherein, The bottom of the longitudinal positioning block (10) is provided with a transverse positioning seat (40), which is adapted to the groove between adjacent teeth along the circumferential direction on the sprocket.

3. The sprocket wear detection tool of claim 1, wherein, The longitudinal end face of the longitudinal positioning block (10) is provided with a longitudinal groove (11), the longitudinal detection rod (21) slides through the longitudinal groove (11), the end of the longitudinal detection rod (21) is vertically connected to a limiting plate (22), the limiting plate (22) extends laterally to the outside of the longitudinal positioning block (10), and the first protrusion (23) is provided on the limiting plate.

4. The sprocket wear detection tool of claim 3, wherein, The longitudinal positioning block (10) has an extension (12) on its transverse sidewall, and the extension (12) has a transverse groove (13). The transverse detection rod (31) slides through the transverse groove (13).

5. The sprocket wear detection tool of claim 4, wherein, The top surface of the longitudinal positioning block (10) is provided with a first elongated hole corresponding to the longitudinal slide groove (11), the longitudinal detection rod (21) is provided with a first threaded rod (24) passing through the first elongated hole, the top surface of the extension (12) is provided with a second elongated hole corresponding to the transverse slide groove (13), the transverse detection rod (31) is provided with a second threaded rod (33) passing through the second elongated hole, and both the first threaded rod (24) and the second threaded rod (33) are threadedly connected with a locking nut (60).

6. The sprocket wear detection tool of claim 1, wherein, The surfaces of the longitudinal detection rod (21) and the transverse detection rod (31) are provided with length scale lines.

7. The sprocket wear detection tool of claim 2, wherein, Two sets of longitudinal positioning blocks (10) are spaced apart on the transverse positioning seat (40), and the transverse positioning seat (40) is provided with a hand handle (50).

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