A locomotive driven gear testing tool

Abstract

This utility model belongs to the field of parts inspection technology and discloses a locomotive driven gear inspection tool. It includes a ruler body, with a measuring rod mounted at one end. The lower end of the measuring rod abuts against the end face of the gear, and the length of the measuring rod is greater than the gear radius. A vernier scale is slidably mounted on the ruler body, and a vertical ruler frame is mounted on the vernier scale. A positioning seat is mounted on the vertical ruler frame and placed on a shaft. A positioning claw is mounted on the vertical ruler frame, and the positioning claw abuts against the end face of the shaft. A first graduation is set on the ruler body along its length, and a second graduation is also set on the vernier scale. The length direction of the ruler body is parallel to the axis of the shaft, and the first graduation is flush with the contact surface of the measuring rod. This invention solves the problem in existing technologies where the distance between the shoulder end face of the lower gear axle and the inner end face of the driven gear hub cannot be directly measured.

Description

Technical Field

[0001] This utility model relates to the field of parts inspection technology, and in particular to a locomotive driven gear inspection tool. Background Technology

[0002] Locomotive wheelsets are a crucial component of the running gear of locomotives and rolling stock. A wheelset assembly includes a driven gear, drive motor, axle housing, wheel and axle box assembly, etc. The pressing position of the wheel relative to the axle is a critical dimension affecting wheelset operation. This pressing position is determined by the position of the driven gear relative to the axle; therefore, the assembly position dimension of the driven gear relative to the axle serves as the benchmark for locomotive wheelset pressing dimensions.

[0003] The driven gear's inner bore and the axle gear seat are fitted with an interference fit, typically assembled using cold pressing, hot fitting, or oil injection press fitting. After assembly, the driven gear's position relative to the axle needs to be checked. Generally, technical documents specify that the measurement is based on the axle shoulder end face on the tooth side, measuring the distance from the inner end face of the driven gear hub. This dimension needs to be measured around the top of the gear, constituting a spatial dimension, and cannot be directly measured using ordinary measuring tools.

[0004] Currently, the measurement method generally uses a vernier depth gauge for indirect measurement. This involves using the vernier depth gauge with the tooth flank shoulder as a reference to measure the outer end face of the driven gear hub, then adding this measurement to the driven gear hub thickness to indirectly calculate the driven gear's indentation distance. However, because the reference surface is relatively small, the vernier caliper may be unstable, leading to errors during measurement. Furthermore, adding the measured value to the gear hub thickness amplifies these errors, ultimately resulting in an inaccurate reference dimension. Utility Model Content

[0005] The purpose of this utility model is to provide a locomotive driven gear detection tool to solve the problem that the distance between the end face of the axle shoulder on the lower gear side and the inner end face of the driven gear hub cannot be directly measured in the prior art.

[0006] To achieve this objective, the present invention adopts the following technical solution: The present invention provides a locomotive driven gear detection tool, including a ruler body, a measuring rod installed at the end of the ruler body, the lower end of the measuring rod abutting against the end face of the gear, the length of the measuring rod being greater than the radius of the gear, a vernier scale slidably mounted on the ruler body, a vertical ruler frame mounted on the vernier scale, a positioning seat mounted on the vertical ruler frame, the positioning seat being placed on a shaft, a positioning claw mounted on the vertical ruler frame, the positioning claw abutting against the end face of the shaft, a first scale being provided on the ruler body along its length direction, and a second scale being provided on the vernier scale, the length direction of the ruler body being parallel to the axis of the shaft, and the first scale being flush with the contact surface of the measuring rod.

[0007] Preferably, a digital display screen is installed on the vernier scale, and a distance sensor is installed inside the digital display screen, which can display the movement distance of the vernier scale.

[0008] Preferably, the locomotive driven gear testing tool further includes a calibration component, which includes a calibration rod placed on a calibration support, with the positioning claw and the measuring rod respectively abutting against both sides of the calibration rod.

[0009] Preferably, the measuring rod is detachably equipped with an outer head, which is parallel to the ruler body and extends toward one side of the vertical ruler frame.

[0010] Preferably, a sleeve is installed on the vernier scale, and a screw is screwed onto the side wall of the sleeve. The vertical ruler frame is inserted into the sleeve, and the screw abuts against the vertical ruler frame.

[0011] Preferably, the side of the vertical ruler frame away from the ruler body is Y-shaped, and the vertical ruler frame includes a first sleeve rod and a second sleeve rod. The ends of the first sleeve rod and the second sleeve rod are equipped with positioning seats, which are snapped onto the shaft or the calibration rod.

[0012] Preferably, a handle is installed at the upper end of the second sleeve rod.

[0013] Preferably, a connecting rod is installed between the first sleeve rod and the second sleeve rod, and a counterweight is installed on the connecting rod.

[0014] Preferably, a bolt is screwed onto the positioning claw, and a first screw hole is provided on the positioning claw. The bolt passes through the first screw hole and is screwed onto the second sleeve rod.

[0015] Preferably, the positioning seat has a V-shaped groove, and sliders are installed on both sides of the V-shaped groove. The sliders are in contact with the shaft or the calibration rod, and the sliders slide along the inclined surface in the V-shaped groove.

[0016] Beneficial effects: By increasing the length of the measuring rod and the distance between the positioning claw and the ruler body, the U-shaped space formed by the measuring rod, the ruler body, and the vertical ruler frame can bypass the gear, enabling the locomotive driven gear inspection tool to directly measure the inner end face of the gear hub and the end face of the shaft shoulder, reducing the error caused by indirect measurement. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the connection between the ruler body and the calibration rod of this utility model;

[0018] Figure 2 This is a schematic diagram of the connection between the ruler body and the shaft of this utility model.

[0019] In the diagram: 1. Ruler body; 2. Measuring rod; 3. Gear; 4. Vernier caliper; 5. Vertical ruler frame; 51. First set of rods; 52. Second set of rods; 6. Positioning seat; 7. Digital display screen; 8. Calibration rod; 9. Calibration support; 10. Outer head; 11. Sleeve; 12. Screw; 13. Handle; 14. Connecting rod; 15. Counterweight; 16. Bolt; 17. Positioning claw; 18. Shaft. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0021] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0024] In the current technology, during the measurement process, the gear body acts as an obstruction between the axle shoulder end face and the inner end face of the gear hub. The ruler-shaped vernier caliper cannot directly measure the distance between the two faces. The measurement is performed indirectly, but the thickness of the gear hub may increase the error, which ultimately leads to a further amplification of the measured distance error.

[0025] To solve the above problems, such as Figures 1 to 2 As shown, this utility model provides a locomotive driven gear testing tool, including a ruler body 1, a measuring rod 2 installed at the end of the ruler body 1, the lower end of the measuring rod 2 abutting against the end face of the gear 3, the length of the measuring rod 2 being greater than the radius of the gear 3, a vernier scale 4 slidably installed on the ruler body 1, a vertical ruler frame 5 installed on the vernier scale 4, a positioning seat 6 installed on the vertical ruler frame 5, the positioning seat 6 being placed on the shaft body 18, a positioning claw 17 installed on the vertical ruler frame 5, the positioning claw 17 abutting against the end face of the shaft body 18, a first scale is provided on the ruler body 1 along the length direction of the ruler body 1, and a second scale is also provided on the vernier scale 4, the length direction of the ruler body 1 is parallel to the axis of the shaft body 18, and the first scale is flush with the contact surface of the measuring rod 2.

[0026] This invention extends the measuring rods 2 at both ends of the ruler body 1 and the vertical ruler frame 5, forming a U-shaped space between the vertical ruler frame 5, the ruler body 1, and the measuring rods 2. This U-shaped space can accommodate the gear 3. The measuring rods 2 abut against the end face of the gear 3, i.e., the inner end face of the gear hub, and the positioning claw 17 abuts against the end face of the shaft 18. This allows the ruler body 1 to directly contact the two end faces to be measured, enabling the locomotive driven gear detection tool to bypass the gear 3 and directly measure the distance between the inner end face of the gear 3 hub and the end face of the axle shoulder. This direct measurement reduces errors caused by indirect distance measurement and improves accuracy. The final detection data can be obtained through the coordination of the first and second scales.

[0027] The vernier caliper 4 of this invention is equipped with a digital display screen 7, and a distance sensor is installed inside the digital display screen 7. The digital display screen 7 can display the moving distance of the vernier caliper 4. By setting up the digital display screen 7 and the distance sensor, the moving distance of the vernier caliper 4 can be intuitively obtained during the movement of the vernier caliper 4, thereby obtaining the data obtained by the locomotive driven gear detection tool and reducing the complexity of measurement.

[0028] The locomotive driven gear testing tool of this utility model also includes a calibration component, which includes a calibration rod 8. The calibration rod 8 is placed on a calibration support 9, and the positioning claw 17 and the measuring rod 2 respectively abut against both sides of the calibration rod 8.

[0029] Before using the ruler 1 for testing, a pre-test is required to set the zero point. First, place the calibration rod 8 on the calibration support 9, then place the measuring rod 2 and the positioning claw 17 against the two ends of the calibration rod 8, and observe the value on the digital display screen 7. Observe whether the value is consistent with the length of the calibration rod 8. If there is an error, adjust it until it is consistent. Then, place the measuring rod 2 and the positioning claw 17 on the shaft 18 for measurement. This can further reduce the measurement error and make the final measurement data of the inner end face of the gear 3 hub and the shoulder end face of the shaft 18 more accurate.

[0030] The measuring rod 2 of this utility model is detachably equipped with an outer head 10. The outer head 10 is parallel to the ruler body 1 and extends towards the vertical ruler frame 5. By setting the outer head 10, the ruler body 1 can measure the distance of the end face recessed into the object being measured, making the locomotive driven gear detection tool more versatile. By replacing the outer head 10 with different shapes, it is possible to measure various types of end face distances.

[0031] A sleeve 11 is installed on the vernier scale 4, and a screw 12 is screwed onto the side wall of the sleeve 11. The vertical ruler frame 5 is inserted into the sleeve 11, and the screw 12 abuts against the vertical ruler frame 5. The vertical ruler frame 5 slides inside the sleeve 11, which can adjust the distance between the positioning claw 17 and the scale body 1. At the same time, the measuring rod 2 and the outer head 10 can be replaced with different lengths, so that the locomotive driven gear detection tool can measure the axle with gears 3 of different diameters.

[0032] The side of the vertical ruler frame 5 away from the ruler body 1 is Y-shaped. The vertical ruler frame 5 includes a first sleeve rod 51 and a second sleeve rod 52. The ends of the first sleeve rod 51 and the second sleeve rod 52 are equipped with positioning seats 6, which are snapped onto the shaft body 18 or the calibration rod 8.

[0033] To improve the stability of the ruler 1 during measurement, positioning seats 6 on the first and second sets of rods 51 and 52 are connected to the shaft 18. The positioning seats 6 are mounted on the shaft 18, keeping the ruler 1 stable. This allows the measuring rod 2 to maintain stable contact with the side being measured, reducing errors caused by wobbling. Simultaneously, it ensures stable contact between the positioning claw 17 and the surface being measured, further reducing errors caused by ruler 1 wobbling. This ensures that the length direction of the ruler 1 remains parallel to the axis of the shaft 18, improving the accuracy of the test data and reducing errors.

[0034] The upper end of the second rod 52 is equipped with a handle 13. The handle 13 makes it easier for the testing personnel to hold the second rod 52 and change the position of the positioning claw 17 and the positioning seat 6, which facilitates the subsequent data testing.

[0035] A connecting rod 14 is installed between the first set of rods 51 and the second set of rods 52. A counterweight 15 is installed on the connecting rod 14. By setting the counterweight 15, the center of gravity of the locomotive driven gear detection tool can be changed, so that the locomotive driven gear detection tool can be stably placed on the shaft 18 without shaking, thereby improving the accuracy of the detection data.

[0036] A bolt 16 is screwed onto the positioning claw 17. A first screw hole is opened on the positioning claw 17. The bolt 16 passes through the first screw hole and is screwed onto the second sleeve rod 52. The positioning claw 17 of different sizes and lengths can be replaced by the bolt 16 to adapt to the measurement of different scenarios, so that the positioning claw 17 can abut against the contact surface and improve the accuracy of the detection distance.

[0037] The positioning seat 6 has a V-shaped groove, and sliders are installed on both sides of the V-shaped groove. The sliders contact the shaft 18 or the calibration rod 8 and slide along the inclined surface inside the V-shaped groove. By setting the sliders, the distance between the sliders can be adjusted, so that the sliders can be engaged with shafts 18 of different diameters, and the ruler 1 can be kept parallel to shafts 18 of different diameters, thereby improving the accuracy of the measurement distance.

[0038] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A locomotive driven gear inspection tool characterized by, The device includes a ruler body (1), a measuring rod (2) is installed at the end of the ruler body (1), the lower end of the measuring rod (2) abuts against the end face of the gear (3), the length of the measuring rod (2) is greater than the radius of the gear (3), a vernier scale (4) is slidably installed on the ruler body (1), a vertical ruler frame (5) is installed on the vernier scale (4), a positioning seat (6) is installed on the vertical ruler frame (5), the positioning seat (6) is placed on the shaft (18), a positioning claw (17) is installed on the vertical ruler frame (5), the positioning claw (17) abuts against the end face of the shaft (18), a first scale is set on the ruler body (1) along the length direction of the ruler body (1), a second scale is also set on the vernier scale (4), the length direction of the ruler body (1) is parallel to the axis of the shaft (18), and the first scale is flush with the contact surface of the measuring rod (2).

2. The locomotive driven gear detection tool of claim 1, wherein, A digital display screen (7) is installed on the vernier scale (4), and a distance sensor is installed inside the digital display screen (7). The digital display screen (7) can display the moving distance of the vernier scale (4).

3. The locomotive driven gear detection tool of claim 2, wherein, The locomotive driven gear testing tool also includes a calibration component, which includes a calibration rod (8) placed on a calibration support (9). The positioning claw (17) and the measuring rod (2) respectively abut against both sides of the calibration rod (8).

4. The locomotive driven gear inspection tool of claim 1, wherein, The measuring rod (2) is detachably equipped with an outer head (10), which is parallel to the ruler body (1) and extends toward the vertical ruler frame (5).

5. The locomotive driven gear inspection tool of claim 1, wherein, A sleeve (11) is installed on the vernier scale (4), and a screw (12) is screwed onto the side wall of the sleeve (11). The vertical ruler frame (5) is inserted into the sleeve (11), and the screw (12) abuts against the vertical ruler frame (5).

6. The locomotive driven gear detection tool of claim 3, wherein, The vertical ruler frame (5) is Y-shaped on the side away from the ruler body (1). The vertical ruler frame (5) includes a first sleeve rod (51) and a second sleeve rod (52). The positioning seat (6) is installed at the end of both the first sleeve rod (51) and the second sleeve rod (52). The positioning seat (6) is snapped onto the shaft body (18) or the calibration rod (8).

7. The locomotive driven gear detection tool of claim 6, wherein, The second sleeve rod (52) has a handle (13) installed on its upper end.

8. The locomotive driven gear detection tool of claim 6, wherein, A connecting rod (14) is installed between the first sleeve rod (51) and the second sleeve rod (52), and a counterweight (15) is installed on the connecting rod (14).

9. The locomotive driven gear detection tool of claim 6, wherein, A bolt (16) is screwed onto the positioning claw (17), and a first screw hole is provided on the positioning claw (17). The bolt (16) passes through the first screw hole and is screwed onto the second sleeve rod (52).

10. The locomotive driven gear detection tool of claim 6, wherein, The positioning seat (6) has a V-shaped groove, and sliders are installed on both sides of the V-shaped groove. The sliders are in contact with the shaft (18) or the calibration rod (8), and the sliders slide along the inclined surface in the V-shaped groove.

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