Automatic adjusting mechanism for rail flaw detection wheel

Abstract

This utility model discloses an automatic adjustment mechanism for rail flaw detection wheels, including a frame assembly, a guide frame assembly disposed on the lower left side of the frame assembly, an adjustment frame assembly disposed in the middle of the guide frame assembly, and a detection wheel assembly disposed in the lower middle of the adjustment frame assembly. The frame assembly includes a mounting plate, a guide frame rail, a guide frame compression spring, an adjustment frame rail, and a lever. The frame assembly is connected to an external vehicle body via the mounting plate. The guide frame assembly is connected to the frame assembly via the guide frame rail, and the adjustment frame assembly is connected to the frame assembly via the adjustment frame rail. The guide frame assembly includes a guide wheel, a first water spray nozzle, a guide block, a guide frame rail sleeve, and a translation motor. This adjustment mechanism adopts a cage-type frame structure, which effectively improves the rigidity and stability of the overall structure compared to the poor stability of existing small flaw detection vehicle detection mechanisms, ensuring the stability of the detection wheel during operation and reducing detection errors caused by mechanism swaying.

Description

Technical Field

[0001] This utility model belongs to the technical field of rail flaw detection, specifically relating to an automatic adjustment mechanism for rail flaw detection wheels. Background Technology

[0002] The automatic adjustment mechanism for rail flaw detection wheels is a device used in rail flaw detection equipment. Its main function is to automatically adjust the contact state between the flaw detection wheel and the rail, ensuring that the wheel maintains a stable and accurate contact with the rail surface for flaw detection. This mechanism automatically changes the position, angle, and pressure parameters of the flaw detection wheel based on the actual condition of the rail, such as surface flatness, wear degree, and rail type variations. This automatic adjustment ensures that the flaw detection wheel maintains a good coupling state during rail operation, improving the accuracy and reliability of flaw detection, promptly detecting internal damage, cracks, and other defects in the rail, and ensuring the safe operation of the railway track.

[0003] The existing small flaw detection vehicle inspection mechanism has poor stability and insufficient overall rigidity because it does not adopt a cage frame structure. Affected by the relative movement between the vehicle body and the rail, the unevenness of the rail surface, and the vibration of the vehicle body, the mechanism is prone to shaking, displacement, or deformation. This causes the relative position of components such as the probe wheel and guide wheel to be unstable, making it impossible for the probe wheel to maintain the preset relative posture with the rail, affecting the contact effect and detection accuracy, and causing deviation in the detection data. Utility Model Content

[0004] The purpose of this invention is to provide an automatic adjustment mechanism for rail flaw detection wheels, addressing the shortcomings of existing small flaw detection vehicle mechanisms in the background art, which suffer from poor stability and insufficient overall rigidity due to the lack of a cage-like frame structure. Affected by the relative movement between the vehicle body and the rail, uneven rail surfaces, and vehicle vibration, the mechanism is prone to swaying, displacement, or deformation, leading to unstable relative positions of components such as the detection wheel and guide wheel. This prevents the detection wheel from maintaining its preset relative posture with the rail, affecting the contact effect and detection accuracy, and causing deviations in the detection data.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an automatic adjustment mechanism for rail flaw detection wheels, comprising a frame assembly, a guide frame assembly disposed on the lower left side of the frame assembly, an adjustment frame assembly disposed in the middle of the guide frame assembly, and a detection wheel assembly disposed in the middle of the lower side of the adjustment frame assembly;

[0006] The frame assembly includes a mounting plate, a guide rail, a guide spring, an adjustment rail, and a lever. The frame assembly is connected to the external vehicle body via the mounting plate. The guide rail assembly and the frame assembly are connected via the guide rail. The adjustment rail assembly and the frame assembly are connected via the adjustment rail.

[0007] The guide frame assembly includes a guide wheel, a first water spray nozzle, a guide block, a guide frame guide rail sleeve, and a translation motor. The guide frame assembly is sleeved on the guide frame guide rail through the guide frame guide rail sleeve.

[0008] The adjustment frame assembly includes an adjustment frame guide sleeve, a deflection shaft, a deflection motor, and a lever shaft. The adjustment frame assembly is sleeved on the adjustment frame guide rail through the adjustment frame guide sleeve and is connected to the guide frame assembly through a translation motor.

[0009] The probe wheel assembly includes a flaw detection wheel body, a probe wheel frame, a probe wheel pressure block, a probe wheel adjustment plate, a probe wheel clamping plate, a leveling screw, a second water spray nozzle, and mounting bolts. The probe wheel assembly is connected to the deflection shaft of the adjustment frame assembly via the mounting bolts.

[0010] Preferably, the mounting plate is used to fix it to the vehicle body, the guide rail and the adjustment rail are arranged in a horizontal direction, the guide spring is used to apply lateral pressure to the guide assembly, and the lever is rotatable with the pin on the frame assembly as the fulcrum.

[0011] Preferably, the guide wheel is fixed on the guide frame assembly, the guide frame guide rail sleeve cooperates with the guide frame guide rail of the frame assembly to achieve horizontal movement, and the extension and retraction of the translation motor can adjust the horizontal relative position of the guide frame assembly and the adjustment frame assembly.

[0012] Preferably, the adjustment frame guide sleeve cooperates with the adjustment frame guide rail of the frame assembly to achieve horizontal movement, and the extension and retraction of the deflection motor can adjust the vertical deflection angle of the adjustment frame assembly and the probe wheel assembly.

[0013] Preferably, the flaw detection wheel body is fixed on the flaw detection wheel frame, the wheel axle of the flaw detection wheel body is rotatable with a gap between it and the flaw detection wheel frame, the flaw detection wheel adjustment plate and the flaw detection wheel clamping plate hold the shaft end of the flaw detection wheel body tightly, the leveling screw is used to finely adjust the front and rear horizontal level of the flaw detection wheel body, and the flaw detection wheel assembly is connected by mounting bolts and adjustment frame assembly.

[0014] Preferably, the guide frame compression spring of the frame assembly is connected to the frame assembly and the guide frame assembly at both ends to provide lateral pressure to the guide frame assembly, and the guide frame guide rail sleeve of the guide frame assembly is sleeved on the guide frame guide rail of the frame assembly, so that the guide frame assembly can slide horizontally along the guide frame guide rail.

[0015] Preferably, the adjustment frame guide sleeve of the adjustment frame assembly is sleeved on the adjustment frame guide rail of the frame assembly, so that the adjustment frame assembly can slide horizontally along the adjustment frame guide rail. One end of the deflection shaft is hinged to the adjustment frame assembly, and the other end is fixedly connected to the probe wheel assembly.

[0016] Preferably, the probe wheel pressure block of the probe wheel assembly is pressed onto the probe wheel frame to fix the relative position of the probe wheel frame and the flaw detection wheel body. One end of the translation motor of the guide frame assembly is connected to the guide frame assembly, and the other end is connected to the adjustment frame assembly, changing the horizontal distance between the two by its own extension and retraction.

[0017] Preferably, the lever shaft of the adjusting frame assembly is in contact with the lever, and when the lever rotates, it drives the adjusting frame assembly to move through the lever shaft. The guide block of the guide frame assembly is arranged opposite to the side of the rail to assist the guide frame assembly in moving along the rail direction.

[0018] Preferably, the second water nozzle of the probe wheel assembly is disposed opposite to the main body of the flaw detection wheel and is used to spray water onto the contact area between the main body of the flaw detection wheel and the rail, and the first water nozzle of the guide frame assembly is disposed opposite to the guide wheel and is used to spray water onto the contact area between the guide wheel and the rail.

[0019] Compared with the prior art, this utility model provides an automatic adjustment mechanism for rail flaw detection wheels, which has the following advantages:

[0020] The adjustment mechanism adopts a cage-like frame structure, which effectively improves the rigidity and stability of the overall structure compared to the poor stability of existing small flaw detection vehicle inspection mechanisms. This ensures that the probe wheel maintains a stable posture during operation and reduces inspection errors caused by mechanism swaying.

[0021] Among them, the horizontal adjustment of the flaw detection wheel adopts a screw fine-tuning structure. Compared with the shortcomings of the low adjustment accuracy of the flaw detection wheel in the existing technology, the horizontal state of the flaw detection wheel can be slightly adjusted by finely turning the leveling screw, which greatly improves the accuracy of the flaw detection wheel attitude adjustment and ensures the horizontal alignment accuracy between the flaw detection wheel and the rail.

[0022] Linear bearings are used at both ends of the linear motion parts (the cooperation between the guide frame assembly and the frame assembly, and the cooperation between the adjustment frame assembly and the frame assembly), which effectively reduces motion resistance, makes the horizontal movement of each component smoother and more stable, reduces adjustment lag or position deviation caused by motion jamming, and further ensures the accuracy of the relative position of the flaw detection wheel and the rail.

[0023] This adjustment mechanism can automatically achieve the contact and relative position of the flaw detection wheel with the rail through the lateral pressure of the guide frame compression spring and the coordinated adjustment of the translation motor and the deflection motor. Combined with the lever principle of the manual lever, the flaw detection wheel can be disengaged. The operation mechanism is more reliable and can more stably meet the requirements of contact, alignment and disengagement of the flaw detection wheel with the rail compared with the existing technology, thus improving the continuity and stability of the inspection process. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the flaw detection mechanism in this utility model.

[0025] Figure 2 This is a schematic diagram showing the disassembled structure of the flaw detection mechanism in this utility model.

[0026] Figure 3 This is a structural schematic diagram of the guide frame assembly in cross-section of this utility model.

[0027] Figure 4 This is a cross-sectional structural diagram of the adjustment frame assembly in this utility model.

[0028] Figure 5 This is a schematic diagram of the probe assembly in this utility model.

[0029] In the diagram: A. Frame assembly; A1. Hanging plate; A2. Guide frame rail; A3. Guide frame compression spring; A4. Adjustment frame rail; A5. Lever; B. Guide frame assembly; B1. Guide wheel; B2. First spray nozzle; B3. Guide block; B4. Guide frame rail sleeve; B5. Translation motor; C. Adjustment frame assembly; C1. Adjustment frame rail sleeve; C2. Deflection shaft; C3. Deflection motor; C4. Lever shaft; D. Probe wheel assembly; D1. Probe wheel body; D2. Probe wheel frame; D3. Probe wheel pressure block; D4. Probe wheel adjustment plate; D5. Probe wheel clamping plate; D6. Leveling screw; D7. Second spray nozzle; D8. Mounting bolt. Detailed Implementation

[0030] 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.

[0031] This utility model provides, for example Figure 1-5 The automatic adjustment mechanism for rail flaw detection wheels shown includes a frame assembly A, a guide frame assembly B disposed on the lower left side of the frame assembly A, an adjustment frame assembly C disposed in the middle of the guide frame assembly B, and a detection wheel assembly D disposed in the middle of the lower side of the adjustment frame assembly C.

[0032] Frame assembly A includes a mounting plate A1, a guide rail A2, a guide spring A3, an adjustment rail A4, and a lever A5. The mounting plate A1 is used to fix the frame assembly A to the external vehicle body, maintaining a fixed relative position between the frame assembly A and the vehicle body. The guide rail A2 and the adjustment rail A4 are arranged parallel to each other in the horizontal direction, providing guidance for the horizontal movement of the guide frame assembly B and the adjustment frame assembly C. The guide spring A3 is connected at both ends to frame assembly A and guide frame assembly B, respectively, to apply continuous lateral pressure to guide frame assembly B. The lever A5 is rotatable around a pin on frame assembly A, driving the movement of other components through a lever principle.

[0033] The guide frame assembly B includes guide wheels B1, first water nozzles B2, guide blocks B3, guide frame rail sleeves B4, and a translation motor B5. There are two guide wheels B1, symmetrically fixed on both sides of the guide frame assembly B. Their outer surfaces are used to contact the top surface of the rail, and their inner surfaces are used to contact the side surface of the rail. The first water nozzles B2 are positioned corresponding to the guide wheels B1 and are used to spray water onto the contact area between the guide wheels B1 and the rail. The guide blocks B3 are positioned opposite the side surface of the rail to assist the guide frame assembly B in moving along the rail direction. The guide frame rail sleeves B4 are fitted onto the guide frame rails A2 of the frame assembly A, and both ends are equipped with linear bearings. Figure 3 As shown, the guide frame assembly B can slide smoothly horizontally along the guide frame rail A2; one end of the translation motor B5 is connected to the guide frame assembly B, and the other end is connected to the adjustment frame assembly C, and the horizontal relative position of the two is changed by its own extension and retraction.

[0034] The adjustment frame assembly C includes an adjustment frame guide sleeve C1, a deflection shaft C2, a deflection motor C3, and a lever shaft C4. The adjustment frame guide sleeve C1 is fitted onto the adjustment frame guide rail A4 of the frame assembly A, and both ends also use linear bearings. Figure 4 As shown, the adjustment frame assembly C can slide smoothly horizontally along the adjustment frame guide rail A4; one end of the deflection shaft C2 is hinged to the adjustment frame assembly C, and the other end is fixedly connected to the probe wheel assembly D through the mounting bolt D8; one end of the deflection motor C3 is connected to the adjustment frame assembly C, and the other end is connected to the probe wheel assembly D, and drives the probe wheel assembly D to deflect around the deflection shaft C2 through its own extension and retraction; the lever shaft C4 is fixed on the adjustment frame assembly C and contacts the lever A5 of the frame assembly A, and is used to transmit the force of the lever A5.

[0035] The probe wheel assembly D includes the probe wheel body D1, the probe wheel frame D2, the probe wheel pressure block D3, the probe wheel adjustment plate D4, the probe wheel clamping plate D5, the leveling screw D6, the second water spray nozzle D7, and the mounting bolt D8. The flaw detection wheel body D1 is fixed on the flaw detection wheel frame D2, with a gap between its axle and the flaw detection wheel frame D2 for rotation; the flaw detection wheel adjusting plate D4 and the flaw detection wheel clamping plate D5 are fastened to the shaft end of the flaw detection wheel body D1 by bolts, and the flaw detection wheel pressure block D3 is pressed on the flaw detection wheel frame D2 to fix the relative position of the flaw detection wheel frame D2 and the flaw detection wheel body D1; the leveling screw D6 passes through the flaw detection wheel adjusting plate D4, and its end abuts against the flaw detection wheel frame D2, and can be finely adjusted in terms of the front and rear horizontal level of the flaw detection wheel body D1 by screwing; the second water spray nozzle D7 is set corresponding to the flaw detection wheel body D1 and is used to spray water to the contact part between the flaw detection wheel body D1 and the rail; the flaw detection wheel assembly D is fixedly connected to the deflection shaft C2 of the adjusting frame assembly C by mounting bolt D8.

[0036] In this embodiment, frame assembly A is fixed to the vehicle body via a mounting plate A1, and the vehicle body and the rail are relatively fixed in position. Guide frame assembly B moves horizontally along guide frame rail A2 via guide frame guide sleeve B4, and adjustment frame assembly C moves horizontally along adjustment frame guide rail A4 via adjustment frame guide sleeve C1. Under the lateral pressure of guide frame compression spring A3, the inner surfaces of the two guide wheels B1 are always in close contact with the side of the rail, and the outer surfaces are always in contact with the top surface of the rail. By adjusting the horizontal relative position of guide frame assembly B and adjustment frame assembly C through the telescopic adjustment of translation motor B5, the center of flaw detection wheel body D1 is adjusted to the vertical center line of the rail. By adjusting the vertical deflection angle of adjustment frame assembly C and flaw detection wheel assembly D through the telescopic adjustment of deflection motor C3, the vertical line of flaw detection wheel body D1 is aligned with the vertical center line of the rail, and the contact between guide wheel B1 and the top surface of the rail ensures the downward pressure of flaw detection wheel body D1 on the rail.

[0037] When it is necessary to adjust the level of the flaw detector wheel body D1, tighten the leveling screw D6. Through the contact force between the leveling screw D6 and the flaw detector wheel frame D2, the flaw detector wheel body D1 will rotate slightly around its wheel axle, thereby achieving a fine adjustment of the front and rear level.

[0038] When it is necessary to detach the flaw detection wheel from the rail, manually press down lever A5. Lever A5 rotates around the pin on frame assembly A, which drives adjustment frame assembly C to move towards the car body via lever shaft C4. At the same time, adjustment frame assembly C drives guide frame assembly B and flaw detection wheel assembly D to move synchronously, so that the flaw detection wheel body D1 moves horizontally inward relative to the rail, and the inner side of guide wheel B1 moves away from the side of the rail, thus detaching the flaw detection wheel body D1 from the rail surface.

[0039] The frame of this utility model adopts a cage structure, and the linear motion part is connected by linear bearings, which results in low motion resistance and strong stability. The horizontal adjustment of the flaw detection wheel adopts a screw fine-tuning structure, which has high adjustment accuracy and is suitable for precise control of the attitude of the flaw detection wheel in railway rail inspection equipment.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., 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. An automatic adjustment mechanism for a rail flaw detection wheel, comprising a frame assembly (A), a guide frame assembly (B) disposed on the lower left side of the frame assembly (A), an adjustment frame assembly (C) disposed in the middle of the guide frame assembly (B), and a detection wheel assembly (D) disposed in the middle of the lower side of the adjustment frame assembly (C); Its features are: The frame assembly (A) includes a mounting plate (A1), a guide rail (A2), a guide spring (A3), an adjustment rail (A4), and a lever (A5). The frame assembly (A) is connected to the external vehicle body via the mounting plate (A1). The guide rail assembly (B) is connected to the frame assembly (A) via the guide rail (A2). The adjustment rail assembly (C) is connected to the frame assembly (A) via the adjustment rail (A4). The guide frame assembly (B) includes a guide wheel (B1), a first water nozzle (B2), a guide block (B3), a guide frame guide rail sleeve (B4), and a translation motor (B5). The guide frame assembly (B) is sleeved on the guide frame guide rail (A2) through the guide frame guide rail sleeve (B4). The adjustment frame assembly (C) includes an adjustment frame guide sleeve (C1), a deflection shaft (C2), a deflection motor (C3), and a lever shaft (C4). The adjustment frame assembly (C) is sleeved on the adjustment frame guide rail (A4) through the adjustment frame guide sleeve (C1) and is connected to the guide frame assembly (B) through a translation motor (B5). The probe wheel assembly (D) includes a flaw detection wheel body (D1), a probe wheel frame (D2), a probe wheel pressure block (D3), a probe wheel adjustment plate (D4), a probe wheel clamping plate (D5), a leveling screw (D6), a second water spray nozzle (D7), and a mounting bolt (D8). The probe wheel assembly (D) is connected to the deflection shaft (C2) of the adjustment frame assembly (C) via the mounting bolt (D8).

2. The automatic adjustment mechanism for rail flaw detection wheels according to claim 1, characterized in that: The mounting plate (A1) is used to fix it to the vehicle body. The guide rail (A2) and the adjustment rail (A4) are arranged in the horizontal direction. The guide spring (A3) is used to apply lateral pressure to the guide assembly (B). The lever (A5) is rotatable with the pin on the frame assembly (A) as the fulcrum.

3. The automatic adjustment mechanism for rail flaw detection wheels according to claim 2, characterized in that: The guide wheel (B1) is fixed on the guide frame assembly (B). The guide frame guide rail sleeve (B4) cooperates with the guide frame guide rail (A2) of the frame assembly (A) to achieve horizontal movement. The extension and retraction of the translation motor (B5) can adjust the horizontal relative position of the guide frame assembly (B) and the adjustment frame assembly (C).

4. The automatic adjustment mechanism for rail flaw detection wheels according to claim 3, characterized in that: The adjustment frame guide sleeve (C1) cooperates with the adjustment frame guide rail (A4) of the frame assembly (A) to achieve horizontal movement, and the extension and retraction of the deflection motor (C3) can adjust the vertical deflection angle of the adjustment frame assembly (C) and the probe wheel assembly (D).

5. The automatic adjustment mechanism for rail flaw detection wheels according to claim 4, characterized in that: The flaw detection wheel body (D1) is fixed on the flaw detection wheel frame (D2). The wheel axle of the flaw detection wheel body (D1) is left with a gap to rotate with the flaw detection wheel frame (D2). The flaw detection wheel adjustment plate (D4) and the flaw detection wheel clamping plate (D5) hold the shaft end of the flaw detection wheel body (D1). The leveling screw (D6) is used to fine adjust the front and rear horizontal level of the flaw detection wheel body (D1). The flaw detection wheel assembly (D) is connected to the adjustment frame assembly (C) by mounting bolts (D8).

6. The automatic adjustment mechanism for rail flaw detection wheels according to claim 5, characterized in that: The guide frame compression spring (A3) of the frame assembly (A) is connected to the frame assembly (A) and the guide frame assembly (B) at both ends, providing lateral pressure to the guide frame assembly (B). The guide frame guide rail sleeve (B4) of the guide frame assembly (B) is sleeved on the guide frame guide rail (A2) of the frame assembly (A), so that the guide frame assembly (B) can slide horizontally along the guide frame guide rail (A2).

7. The automatic adjustment mechanism for rail flaw detection wheels according to claim 6, characterized in that: The adjustment frame assembly (C) has its adjustment frame guide sleeve (C1) fitted onto the adjustment frame guide rail (A4) of the frame assembly (A), allowing the adjustment frame assembly (C) to slide horizontally along the adjustment frame guide rail (A4). One end of the deflection shaft (C2) is hinged to the adjustment frame assembly (C), and the other end is fixedly connected to the probe wheel assembly (D).

8. The automatic adjustment mechanism for rail flaw detection wheels according to claim 7, characterized in that: The probe wheel assembly (D) has a probe wheel pressure block (D3) pressed onto the probe wheel frame (D2) to fix the relative position of the probe wheel frame (D2) and the flaw detection wheel body (D1). One end of the translation motor (B5) of the guide frame assembly (B) is connected to the guide frame assembly (B), and the other end is connected to the adjustment frame assembly (C). The horizontal distance between the two is changed by its own extension and retraction.

9. The automatic adjustment mechanism for rail flaw detection wheels according to claim 8, characterized in that: The lever shaft (C4) of the adjusting frame assembly (C) is in contact with the lever (A5). When the lever (A5) rotates, it drives the adjusting frame assembly (C) to move through the lever shaft (C4). The guide block (B3) of the guide frame assembly (B) is arranged opposite to the side of the rail to assist the guide frame assembly (B) in moving along the rail direction.

10. The automatic adjustment mechanism for rail flaw detection wheels according to claim 9, characterized in that: The second water nozzle (D7) of the probe wheel assembly (D) is arranged opposite to the flaw detection wheel body (D1) and is used to spray water onto the contact area between the flaw detection wheel body (D1) and the rail. The first water nozzle (B2) of the guide frame assembly (B) is arranged opposite to the guide wheel (B1) and is used to spray water onto the contact area between the guide wheel (B1) and the rail.

Images