A catenary positioning hook and positioning support wear measuring tool

Abstract

The utility model belongs to the positioning hook and positioning support wear measuring technical field of contact network, especially, relate to a kind of contact network positioning hook and positioning support wear measuring tool. Including the vertical setting plug gauge, the plug gauge is conical platform structure, the diameter of plug gauge lower end is less than the diameter of its upper end, the outside wall of plug gauge is provided with several scale lines from lower to upper distribution and for indicating the diameter of plug gauge scale line. The utility model inserts the plug gauge of conical shape from upper to lower between the movable hole diameter between positioning seat and positioning hook, until plug gauge cannot be active, reads out the scale line size on plug gauge representing its diameter, wear size between positioning support and positioning hook can be accurately judged.

Description

Technical Field

[0001] This utility model belongs to the field of wear measurement technology for contact wire positioning hooks and positioning supports, and in particular relates to a tool for measuring the wear of contact wire positioning hooks and positioning supports. Background Technology

[0002] During routine maintenance, abnormal wear was found to be particularly prominent at the connection between the positioning hook and the positioning support of the high-speed railway catenary. Under normal circumstances, the positioner should be under tension (≥80N), leading to wear at the contact point between the positioning support and the positioning hook, and an increase in the static angle of the positioner. Simultaneously, repeated impacts between the two components at the hook-ring connection during operation cause stress concentration and excessive local stress at the connection point. This repeated vibration and friction exacerbates wear at the contact point, making stress concentration caused by the hook-ring structure the root cause of abnormal wear. Furthermore, factors such as corrosive environments and tunnel wind tunnel effects accelerate wear at the hook-ring connection. This can lead to component breakage and detachment, intruding into the dynamic envelope of the train's pantograph and causing a pantograph-catenary accident.

[0003] In existing technologies, the main tools used by operators to judge the degree of wear are vernier calipers or feeler gauges. However, mechanical vernier calipers are difficult to operate and inconvenient to read when measuring inner diameters, while digital vernier calipers are prone to malfunction in inclement weather. Feeler gauges are cylindrical (also called feeler pins), consisting of two cylinders with different diameters, the lower cylinder having a smaller diameter than the upper cylinder. During measurement, the feeler gauge is inserted from top to bottom into the movable hole between the positioning hook and the positioning support (the gap between the back of the positioning hook and the hook ring of the positioning support). When the positioning hook and the positioning support wear to a certain extent, the movable hole increases to the point where the lower cylinder of the feeler gauge can be inserted, indicating that the wear of the positioning hook and the positioning support has exceeded the diameter of the lower cylinder, reaching a point where they need to be replaced. However, this method is relatively crude and cannot accurately measure the wear dimensions of the positioning hook and the positioning support, thus making it impossible to determine the inspection cycle based on the degree of wear. Utility Model Content

[0004] The purpose of this invention is to provide a tool for measuring the wear of contact wire positioning hooks and supports, which can accurately measure the wear dimensions of the positioning hooks and supports.

[0005] The aforementioned contact wire positioning hook and positioning support wear measuring tool includes a vertically arranged feeler gauge. The feeler gauge has a truncated cone structure, with the diameter of the lower end of the feeler gauge being smaller than the diameter of its upper end. Several scale lines are arranged on the outer wall of the feeler gauge from bottom to top to display the wear size.

[0006] Furthermore, the upper end of the feeler gauge is connected to an operating rod, the operating rod has a through hole that communicates with the upper part, the upper end of the feeler gauge has a blind hole that communicates with the through hole, the same sliding column that can slide up and down is installed in the through hole and the blind hole, the outer wall of the operating rod is provided with a locking screw that can lock the sliding column, and the feeler gauge is provided with an indicator head for indicating the scale line, the indicator head and the sliding column are connected by a connecting component.

[0007] Furthermore, the connecting assembly includes two connecting plates arranged left and right. Two sliding grooves arranged left and right and communicating with through holes are opened on the side wall of the operating rod. Two connecting blocks arranged symmetrically left and right and slidingly engaged with the sliding grooves are fixed on the sliding column. The two connecting blocks pass through the sliding grooves and connect to the connecting plates respectively. The bottom of the two connecting plates is fixed with the same reference ring. The reference ring is independently fitted on the feeler gauge. There are two indicating heads, which are symmetrically distributed front and back on the outer side wall of the reference ring.

[0008] Furthermore, a guide groove is provided on the outer wall of the operating lever, and the connecting plate is located in the guide groove.

[0009] Furthermore, the connecting assembly includes two connecting blocks distributed front to back, and two sliding grooves symmetrically distributed front to back and communicating with blind holes are opened on the feeler gauge. The two connecting blocks are fixed on the sliding column and slide up and down with the sliding grooves. There are two indicator heads, and the two connecting blocks pass through the sliding grooves and are connected to the two indicator heads respectively.

[0010] Furthermore, the locking screw is located directly in front of the operating lever.

[0011] Furthermore, the upper end of the feeler gauge is fixed with a connecting pipe communicating with the blind hole, and the lower end of the operating rod is provided with a countersunk hole that connects to the connecting pipe. The connecting pipe and the countersunk hole are connected by a thread.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This invention allows for accurate determination of the wear dimension between the positioning support and the positioning hook by inserting a conical feeler gauge from top to bottom into the movable hole between the positioning seat and the positioning hook until the feeler gauge can no longer move, and then reading the scale line representing its diameter on the feeler gauge. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure at point AA;

[0016] Figure 3 for Figure 1 A schematic diagram of the left-side view structure;

[0017] Figure 4 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 5 This is an exploded structural diagram of the present invention;

[0019] Figure 6 A schematic diagram of the measurement points for the positioning support;

[0020] Figure 7 A schematic diagram of the measurement points for the positioning hook;

[0021] The components in the diagram are named as follows: 1. Feeler gauge; 2. Slide groove; 3. Operating lever; 4. Connecting block; 5. Slide column; 6. Connecting plate; 7. Connecting pipe; 8. Reference ring; 9. Locking screw; 10. Indicator head; 11. Positioning support; 12. Positioning hook. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0023] Example 1

[0024] This embodiment describes a wear measuring tool for contact wire positioning hooks and supports, such as... Figures 1 to 5 As shown, it includes a vertically arranged feeler gauge 1, which has a frustum-shaped structure. The diameter of the lower end of the feeler gauge 1 is smaller than the diameter of its upper end. Several scale lines are arranged on the outer wall of the feeler gauge 1 from bottom to top to indicate the diameter of the feeler gauge 1.

[0025] The feeler gauge 1 is made of a high-hardness, wear-resistant metal material (such as tool steel), and its main body has a truncated cone structure, meaning its diameter increases uniformly from bottom to top. The taper of the feeler gauge 1 is precisely calculated to ensure measurement accuracy. Several annular graduation lines are machined on the outer wall of the feeler gauge 1 using laser engraving or precision etching. These graduation lines are distributed sequentially from bottom to top. The diameter value of the feeler gauge 1 corresponding to each graduation line is known, and the diameter value (unit: mm) can be directly marked next to the line or looked up using a separate lookup table. The bottom of the feeler gauge 1 is the starting point of the graduation line, representing "0" (actual diameter 8.2 mm), and the top graduation line represents 14 mm (actual diameter 22.2 mm). The graduation lines, from smallest to largest, correspond to the diameter of the feeler gauge 1, from thinnest to thickest.

[0026] In addition, the 8.4mm mark should be highlighted, as this is the maximum wear value. Once this value is exceeded, the positioning support 11 and positioning hook 12 need to be replaced.

[0027] To clearly indicate the scale value on feeler gauge 1, this embodiment is equipped with a precision indicating mechanism, as follows:

[0028] The upper end of the feeler gauge 1 is connected to an operating rod 3, which has a through hole. The upper end of the feeler gauge 1 has a blind hole communicating with the through hole. A connecting tube 7 communicating with the blind hole is fixed to the upper end of the feeler gauge 1. The lower end of the operating rod 3 has a countersunk hole that connects to the connecting tube 7. The connecting tube 7 and the countersunk hole are connected by threads. The outer wall of the connecting tube 7 has an external thread, and the wall of the countersunk hole has an internal thread that is threaded to the external thread, thus realizing a detachable connection between the feeler gauge 1 and the operating rod 3.

[0029] A single sliding column 5, capable of sliding up and down, is installed inside both the through hole and the blind hole. The sliding column 5 can slide axially between the through hole and the blind hole. A locking screw 9, capable of locking the sliding column 5, is provided on the outer wall of the operating lever 3. An indicator head 10 for indicating the scale lines is provided on the feeler gauge 1. The indicator head 10 is connected to the sliding column 5 via a connecting assembly. The locking screw 9 is located on the front side of the operating lever 3.

[0030] like Figure 2 As shown, a threaded hole communicating with the through hole is provided on the outer wall of the operating lever 3. The locking screw 9 is threaded into the threaded hole. In use, the locking screw 9 is tightened so that the top end of the locking screw 9 abuts against the slide column 5 to lock it. The stationary slide column 5 slides, thereby locking the current position of the indicator head 10, making it easy for the operator to read the value on the scale line.

[0031] The connecting assembly includes two connecting plates 6 arranged horizontally. Two sliding grooves 2, arranged horizontally and communicating with through holes, are formed on the side wall of the operating lever 3. Two connecting blocks 4, symmetrically arranged horizontally and slidingly engaged with the sliding grooves 2, are fixed on the sliding column 5. The two connecting blocks 4 extend through the sliding grooves 2 and connect to the connecting plates 6. A common reference ring 8 is fixed to the bottom of the two connecting plates 6. The reference ring 8 is independently fitted onto the feeler gauge 1, allowing it to move freely up and down. The centerline of the reference ring 8 is on the same straight line as the centerline of the feeler gauge 1. Two indicator heads 10 are symmetrically distributed front and back on the outer side wall of the reference ring 8.

[0032] The bottom of the indicator head 10 is flush with the bottom of the reference ring 8. When reading the value on the scale, the bottom of the indicator head 10 is used as the reference. In use, when the feeler gauge 1 is inserted through the movable hole between the positioning hook 12 and the positioning support 11, the indicator head 10 and the reference ring 8 are pressed against the top of the hook ring of the positioning support 11 and cannot move with the feeler gauge 1. When the feeler gauge 1 cannot be inserted further, tighten the locking screw 9 to lock the sliding pin 5, and then remove the feeler gauge 1 from the movable hole. At this time, the scale that is flush with the bottom of the indicator head 10 represents the degree of wear of the positioning support 11 and the positioning hook 12.

[0033] like Figure 3 and Figure 4 As shown, a guide groove is provided on the outer wall of the operating lever 3, and the connecting plate 6 is located in the guide groove to prevent external factors from causing the connecting plate 6 to shake, thereby improving its stability.

[0034] In actual use:

[0035] Loosen the locking screw 9 and slide the sliding column 5 downwards, causing the reference ring 8 and the indicator head 10, which are connected to it via the connecting block 4 and the connecting plate 6, to move downwards together, bringing the indicator head 10 close to the lower end of the feeler gauge 1. Then, holding the operating lever 3, vertically insert the lower end of the cone of the feeler gauge 1 into the movable hole between the positioning support 11 and the positioning hook 12 to be measured, while the indicator head 10 remains at the top of the hook ring of the positioning support 11. Gently apply downward pressure, and the feeler gauge 1 will descend in the gap due to its taper until its outer conical surface makes tight contact with the inner wall of the wear gap, at which point it can no longer descend.

[0036] Finally, keeping the feeler gauge 1 stationary, tighten the locking screw 9 to lock the sliding pin 5, remove the feeler gauge 1, and observe the scale line on the feeler gauge 1 directly opposite the bottom of the indicator head 10. The diameter value corresponding to this scale line is the size of the movable hole formed after the current positioning support 11 and positioning hook 12 are worn.

[0037] like Figure 6 and Figure 7 As shown, D1 is initially 18mm, D2 is initially 17.8mm, and the inner diameter of the hole ring of the positioning support 11 is 26mm. When the positioning hook 12 is connected to the positioning support 11, the movable hole diameter between the two is 8.2mm (the size before wear). At this time, the lower end of the feeler gauge 1 cannot be inserted into the movable hole diameter. When the feeler gauge 1 can be inserted into the movable hole diameter, it means that the positioning support 11 and the positioning hook 12 are worn. The value fed back by the scale line on the feeler gauge 1 represents the sum of the wear of the two. If this value is divided by two, it is equivalent to the wear degree of a single component of the positioning support 11 or the positioning hook 12.

[0038] Finally, by comparing the measured aperture size with the safety threshold (8.4mm), the wear size can be accurately determined. If the size has not yet reached 8.4mm, the next maintenance time can be scientifically arranged accordingly. If it reaches or exceeds 8.4mm, it should be replaced immediately. The wear of the designated support 11 and the positioning hook 12 is 8.4mm. The wear of a single component is approximately 4.2mm.

[0039] Example 2:

[0040] This embodiment further illustrates the technology, and its main difference from Embodiment 1 lies in the different connecting components.

[0041] The connecting assembly includes two connecting blocks 4 distributed front to back. The feeler gauge 1 has two sliding grooves 2 that are symmetrically distributed front to back and communicate with blind holes. The two connecting blocks 4 are fixed on the sliding column 5 and slide up and down with the sliding grooves 2. There are two indicator heads 10. The two connecting blocks 4 pass through the sliding grooves 2 and are connected to the two indicator heads 10 respectively.

[0042] The groove 2 is modified to be formed on the side wall of the feeler gauge 1, symmetrically distributed front and back, and communicating with the blind hole at the upper end of the feeler gauge 1. There are two connecting blocks 4, distributed front and back, directly fixed to the sliding column 5. The two connecting blocks 4 extend to the outside through the two grooves 2 on the feeler gauge 1. There are two indicating heads 10, each directly fixed to the outer end of one of the front and one back connecting blocks 4.

[0043] The working principle of this embodiment is the same as that of embodiment 1: the sliding column 5 can directly drive the indicator head 10 to move up and down along the groove 2 on the feeler gauge 1, thereby indicating the corresponding scale value. This structure is more compact and has better overall integrity, avoiding positional interference caused by the conflict between the positioning hook 12 and the reference ring 8 due to the presence of the reference ring 8, and is more conducive to working in narrow spaces.

Claims

1. A wear measuring tool for contact wire positioning hooks and positioning supports, comprising a vertically arranged feeler gauge (1), characterized in that: The feeler gauge (1) has a truncated cone structure. The diameter of the lower end of the feeler gauge (1) is smaller than the diameter of the upper end. Several scale lines are arranged on the outer wall of the feeler gauge (1) from bottom to top to indicate the wear size.

2. The wear measuring tool for contact wire positioning hooks and positioning supports according to claim 1, characterized in that: The upper end of the feeler gauge (1) is connected to an operating rod (3). The operating rod (3) has a through hole that is open from top to bottom. The upper end of the feeler gauge (1) has a blind hole that is open to the through hole. The same sliding column (5) that can slide up and down is installed in the through hole and the blind hole. A locking screw (9) that can lock the sliding column (5) is provided on the outer wall of the operating rod (3). The feeler gauge (1) is provided with an indicator head (10) for indicating the scale line. The indicator head (10) and the sliding column (5) are connected by a connecting component.

3. The wear measuring tool for contact wire positioning hooks and positioning supports according to claim 2, characterized in that: The connecting assembly includes two connecting plates (6) arranged left and right. Two sliding grooves (2) arranged left and right and communicating with through holes are opened on the side wall of the operating rod (3). Two connecting blocks (4) arranged left and right symmetrically and slidingly engaged with the sliding grooves (2) are fixed on the sliding column (5). The two connecting blocks (4) pass through the sliding grooves (2) and connect to the connecting plates (6). The bottom of the two connecting plates (6) is fixed with the same reference ring (8). The reference ring (8) is independently fitted on the feeler gauge (1). There are two indicator heads (10) arranged symmetrically in front and behind on the outer side wall of the reference ring (8).

4. The wear measuring tool for contact wire positioning hooks and positioning supports according to claim 3, characterized in that: The operating lever (3) has a guide groove on its outer side wall, and the connecting plate (6) is located in the guide groove.

5. The wear measuring tool for contact wire positioning hooks and positioning supports according to claim 2, characterized in that: The connecting assembly includes two connecting blocks (4) distributed front to back. The feeler gauge (1) has two sliding grooves (2) that are symmetrically distributed front to back and communicate with blind holes. The two connecting blocks (4) are fixed on the sliding column (5) and slide in a vertically sliding fit with the sliding grooves (2). There are two indicator heads (10). The two connecting blocks (4) pass through the sliding grooves (2) and are connected to the two indicator heads (10) respectively.

6. The wear measuring tool for contact wire positioning hooks and positioning supports according to claim 2, characterized in that: The locking screw (9) is located directly in front of the operating lever (3).

7. The wear measuring tool for contact wire positioning hooks and positioning supports according to claim 2, characterized in that: The upper end of the feeler gauge (1) is fixed with a connecting pipe (7) that communicates with the blind hole, and the lower end of the operating rod (3) is provided with a countersunk hole that connects to the connecting pipe (7). The connecting pipe (7) and the countersunk hole are connected by a thread.

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