Railway wheelset bearing axial clearance measuring device

Abstract

This invention relates to a railway wheelset bearing axial clearance measuring device, comprising a spindle, a sliding sleeve, a torque wrench, bearing end face positioning claws, bearing end clamping claws, a cam, a cam handle, a gauge base, an indicator, a rear stop positioning claw, and a front cover clamping claw. The spindle passes through the sliding sleeve and protrudes from the front and rear ends of the sleeve. The torque wrench is connected to the outer side of the middle part of the sliding sleeve. The bearing end face positioning claws are symmetrically connected to both sides of the rear end of the sliding sleeve. The cam is set in a mounting groove at the upper end of the sliding sleeve. One end of the cam handle passes through the mounting groove and connects to the cam. The bearing end clamping claw is fitted onto the outer surface of the spindle at the front end of the sliding sleeve. Rotating the cam handle rotates the lower side of the bearing end clamping claw to swing backward and clamp the front end face of the bearing. The upper end of the gauge base is connected to the front end surface of the sliding sleeve, and the lower end of the gauge base extends backward and downward to connect with the indicator. The front cover clamping claw and the rear stop positioning claw are respectively positioned at the front and rear ends of the spindle. Locking nuts are connected to the front and rear ends of the spindle. This invention features simple operation and high accuracy in measurement results.

Description

Technical Field

[0001] This invention relates to a measuring device, and more particularly to a measuring device for axial clearance of railway wheelset bearings. Background Technology

[0002] Measurement of axial clearance in railway wheelset bearings is a crucial measurement item during the maintenance of railway locomotives, especially high-speed rail wheelsets and bullet train wheelsets. Existing mechanisms for measuring axial clearance in wheelset bearings can be found in Chinese invention patent application number 201310730116.6, which describes a "Railway Freight Car Wheelset Bearing Axial Clearance Measuring Machine." This measuring machine includes a base, column slide, measuring head, hydraulic system, and control console. Its measurement principle is as follows: the axial force applied to the bearing end face is obtained using hydraulic transmission and a hydraulic pressure sensor; the axial clearance is acquired using a displacement sensor; and an industrial control computer processes the acquired force and displacement to obtain the required axial clearance force. A single hydraulic counter-current bearing is used. However, using this existing measuring machine to measure the axial clearance of wheelset bearings is costly, inconvenient to carry, and involves complex operation, requiring experienced operators. There is also a simple measurement method in the industry, which is to use a dial indicator to check. When the shaft is moved to two extreme positions by a pry bar, the difference in the dial indicator reading is the axial clearance of the bearing. This measurement method is not only labor-intensive, but also has a large measurement error. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of the existing technology by providing a railway wheelset bearing axial clearance measuring device that is small in size, easy to carry, simple to operate, and provides high accuracy in measurement results.

[0004] The technical solution adopted by the present invention to achieve the above objectives is as follows: a railway wheelset bearing axial clearance measuring device, comprising a spindle, a sliding sleeve, a torque wrench, bearing end face positioning claws, bearing end clamping claws, a cam, a cam handle, a gauge base, an indicator, a rear stop positioning claw, and a front cover clamping claw. The inner side of the sliding sleeve is provided with a sliding hole penetrating both ends of the sliding sleeve. The spindle is set in the sliding hole of the sliding sleeve, with both ends protruding from the front and rear ends of the sliding hole. The torque wrench is connected to the outer side of the middle part of the sliding sleeve via a connecting device. When the torque wrench is pushed, the sliding sleeve can slide back and forth relative to the spindle. Two bearing end face positioning claws are symmetrically connected to both sides of the rear end of the sliding sleeve via a connecting device. A mounting groove is provided on the upper side of the front end of the sliding sleeve. The cam is located at the rear end of the mounting groove. One end of the cam handle passes through the side wall of the mounting groove and is connected to the cam. The bearing end clamping claw includes a drive connecting rod and two front clamping claws symmetrically connected to both sides of the front end of the drive connecting rod. The drive connecting rod clamps the two front clamping claws. The jaws are connected in the middle and bend upward and backward to form a shape. The drive link is connected to the two front clamping jaws and has a positioning hole that runs through its front and rear surfaces. The upper side of the positioning hole of the drive link is provided with a hinge hole. The bearing end clamping jaw is sleeved on the outer surface of the spindle at the front end of the slide sleeve through the positioning hole. The drive link is hinged to the front end of the mounting groove by a pin. The end of the drive link extends backward and upward to the upper side of the cam. Rotating the cam handle causes the cam to rotate and push the drive link to swing upward, causing the two front clamping jaws to swing backward and clamp the front end face of the bearing. The upper end of the gauge base is connected to the front surface of the slide sleeve. The lower end of the gauge base extends backward and downward. The indicator probe is installed horizontally backward at the lower end of the gauge base. The rear stop positioning jaw is sleeved on the outer surface of the spindle at the rear end of the slide sleeve. The front cover clamping jaw is sleeved on the outer surface of the spindle at the front end of the bearing end clamping jaw. The rear lock nut is connected to the outer surface of the spindle on the rear side of the rear stop positioning jaw. The front lock nut is connected to the outer surface of the spindle on the front side of the front cover clamping jaw.

[0005] A further technical solution of the present invention is: the bottom inner side of the bearing end face positioning claw is provided with a positioning step that positions itself in relation to the bearing end face.

[0006] A further technical solution of the present invention is: the outer surface of the sliding sleeve is also provided with two outer diameter claws that can be positioned on the outer surface of the bearing, and the two outer diameter claws are symmetrically connected on opposite sides of the sliding sleeve.

[0007] A further technical solution of the present invention is: the dial base is in the shape of an inverted L, the dial base includes a horizontal arm and a vertical arm connected to the front end of the horizontal arm, and the indicator is connected to the bottom end of the vertical arm by an indicator locking pin.

[0008] A further technical solution of the present invention is: the rear stop positioning claw includes a sleeve I and a positioning claw I connected to the bottom end of the sleeve I. The sleeve I is fixed to the surface of the spindle by a locking screw, and the inner surface of the positioning claw I is a flat positioning surface.

[0009] A further technical solution of the present invention is: the front cover clamping claw includes a sleeve II and a positioning claw II connected to the bottom end of the sleeve II. The sleeve II is fixed to the surface of the spindle by a locking screw, and the inner surface of the bottom end of the positioning claw II is a flat positioning surface.

[0010] The axial clearance measuring device for railway wheelset bearings of the present invention has the following advantages: A sliding sleeve is provided on the surface of the spindle. Bearing end face positioning claws and bearing end clamping claws, capable of being positioned at both ends of the bearing, are provided outside the spindle at the front and rear ends of the sliding sleeve. A rear stop positioning claw and a front cover clamping claw are provided outside the spindle on the front and rear outer sides of the bearing end face positioning claws and bearing end clamping claws. The rear stop positioning claw is positioned on the bearing rear stop surface, and the front cover clamping claw abuts against the bearing front cover surface. After the measuring device is positioned, only a torque wrench needs to be rotated in the opposite direction to reach the correct position to read the bearing axial clearance value from the indicator. Compared with the prior art, this measuring device is small in size and easy to carry, the measurement process is simple to operate, the labor intensity is low, and the measurement results can be directly read with high accuracy.

[0011] The axial clearance measuring device for railway wheelset bearings of the present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0012] Figure 1 This is a front view of the railway wheelset bearing axial clearance measuring device of the present invention;

[0013] Figure 2 This is a perspective view of the railway wheelset bearing axial clearance measuring device of the present invention;

[0014] Figure 3 yes Figure 2 Another view of the railway wheelset bearing axial clearance measuring device shown;

[0015] Figure 4 This is a schematic diagram of the measuring structure of the railway wheelset bearing axial clearance measuring device of the present invention;

[0016] Explanation of reference numerals: 1-Mandrel, 2-Rear locking nut, 3-Rear stop positioning claw, 4-Bearing end face positioning claw, 5-Sliding sleeve, 6-Torque wrench, 7-Cam, 8-Cam handle, 9-Bearing end clamping claw, 10-Outer diameter chuck, 11-Indicator base, 12-Front cover clamping claw, 13-Front locking nut, 14-Indicator, 15-Indicator locking pin, 16-Positioning step, 17-Drive linkage, 18-Mounting groove, 19-Pin, 20-Sleeve II, 21-Positioning claw II, 22-Sleeve I, 23-Positioning claw I, 24-Bearing, 25-Bearing rear stop, 26-Bearing front cover, 27-Front end clamping claw. Detailed Implementation

[0017] like Figures 1 to 3As shown, the axial clearance measuring device for railway wheelset bearings of the present invention includes a spindle 1, a sliding sleeve 5, a torque wrench 6, a bearing end face positioning claw 4, a bearing end clamping claw 9, a cam 7, a cam handle 8, a gauge base 11, an indicator 14, a rear stop positioning claw 3, and a front cover clamping claw 12. Figure 1 The direction indicated by the middle arrow F is forward.

[0018] like Figure 1 , Figure 2 , Figure 3 As shown, the mandrel 1 is a solid round steel bar, and the sliding sleeve 5 is a hollow steel structure. The inner side of the sliding sleeve 5 has sliding holes penetrating both ends of the sliding sleeve 5. The mandrel 1 is positioned within the sliding holes of the sliding sleeve 5, with both ends protruding from the front and rear ends of the holes. The torque wrench 6 is connected to the outer side of the sliding sleeve 5 near the center via a connecting device. When the torque wrench 6 is pushed, the sliding sleeve 5 can slide back and forth relative to the mandrel 1. The lower end of the torque wrench 6 has an unlocking mechanism that can lock or unlock the torque wrench 6. This unlocking mechanism is existing technology and will not be described in detail here. The outer surface of the sliding sleeve 5 also has two outer diameter claws 10 that can be positioned on the outer surface of the bearing 24. The two outer diameter claws 10 are symmetrically connected on opposite sides of the sliding sleeve 5. During measurement, the two outer diameter claws 10 are positioned on the outer surface of the bearing 24, ensuring the stability of the measuring device during measurement.

[0019] like Figure 1 , Figure 2 , Figure 3 As shown, two bearing end face positioning claws 4 are symmetrically connected to both sides of the rear end of the sliding sleeve 5 via a connecting device. The bearing end face positioning claws 4 are used to position the rear end face of the bearing 24. A positioning step 16 is also provided at the bottom inner side of the bearing end face positioning claw 4 to position itself relative to the bearing 24 end face. The positioning step 16 allows the bearing end face positioning claw 4 to be positioned more stably and quickly on the rear end face of the bearing 24, preventing slippage. An installation groove 18 is provided on the upper side of the front end of the sliding sleeve 5. The extension direction of the installation groove 18 is basically consistent with the extension direction of the sliding hole. The installation groove 18 consists of two opposing steel plates connected to the upper surface of the front end of the sliding sleeve 5, each steel plate forming one sidewall. A cam 7 is located at the rear end of the installation groove 18. One end of the cam handle 8 passes through the sidewall of the installation groove 18 and connects to the cam 7. Rotating the cam handle 8 rotates the cam 7.

[0020] like Figure 1 , Figure 2 , Figure 3As shown, the bearing end clamping jaw 9 includes a drive link 17 and two front clamping jaws 27 symmetrically connected to both sides of the front end of the drive link 17. The drive link 17 is connected to the two front clamping jaws 27 at the middle and extends upward and backward. A positioning hole is provided at the connection between the drive link 17 and the two front clamping jaws 27, penetrating its front and rear surfaces. A hinge hole is provided on the upper side of the positioning hole of the drive link 17. The central axis 1 of the hinge hole is perpendicular to the central axis 1 of the positioning hole. The positioning hole and the sliding hole extend in the same direction, while the hinge hole extends in a direction perpendicular to the positioning hole. The bearing end clamping jaw 9 is fitted onto the outer surface of the spindle 1 at the front end of the sliding sleeve 5 through the positioning hole. The drive link 17 is hinged to the front end of the mounting groove 18 through the pin 19. The end of the drive link 17 extends backward and upward to the upper side of the cam 7. Rotating the cam handle 8 rotates the cam 7, which pushes the drive link 17 to swing upward, causing the two front clamping jaws 27 to swing backward and clamp the front end face of the bearing 24.

[0021] like Figure 1 , Figure 2 , Figure 3 As shown, the upper end of the base 11 is connected to the front surface of the sliding sleeve 5, and the lower end of the base 11 extends backward and downward. The probe of the indicator 14 is installed horizontally backward at the lower end of the base 11. In this embodiment, the base 11 has an overall inverted L-shaped structure. The base 11 includes a horizontal arm and a vertical arm connected vertically to the front end of the horizontal arm. The indicator 14 is connected to the bottom end of the vertical arm through the indicator locking pin 15. The probe of the indicator 14 contacts the front surface of the bearing 24 horizontally backward. The rear stop positioning claw 3 is fitted onto the outer surface of the spindle 1 at the rear end of the sliding sleeve 5, and the front cover clamping claw 12 is fitted onto the outer surface of the spindle 1 at the front end of the bearing clamping claw 9. In this embodiment, the rear stop positioning claw 3 includes a sleeve I 22 and a positioning claw I 23 connected to the bottom end of the sleeve I 22. The sleeve I 22 is fixed to the surface of the spindle 1 by a locking screw, and the inner surface of the positioning claw I 23 is a flat positioning surface. The front cover clamping claw 12 includes a sleeve II 20 and a positioning claw II connected to the bottom end of the sleeve II 20. The sleeve II 20 is fixed to the surface of the spindle 1 by a locking screw, and the inner surface of the bottom end of the positioning claw II 21 is a flat positioning surface. During measurement, the rear stop positioning claw 3 is positioned on the surface of the bearing rear stop 25, and the front cover clamping claw 12 abuts against the surface of the bearing front cover 26. Two rear locking nuts 2 are connected to the outer surface of the spindle 1 behind the rear stop positioning claw 3, and two front locking nuts 13 are connected to the outer surface of the spindle 1 in front of the front cover clamping claw 12.

[0022] When measuring, refer to Figure 4As shown: 1. Place the measuring device on the bearing 24 of the wheelset being measured. The outer diameter chuck 10 clamps the outer diameter of the bearing 24, so that the rear stop positioning chuck 3 contacts the end face of the bearing rear stop 25. Move the measuring device using the torque wrench 6 (at this time, the torque wrench 6 is not locked) so that the positioning step 16 of the bearing end face positioning chuck 4 contacts the rear end face of the bearing 24; 2. Rotate the cam handle 8. The cam 7 rotates and pushes the drive linkage 17 of the bearing end clamping chuck 9 to swing upward, so that the two front end clamping chucks 27 of the bearing end clamping chuck 9 swing backward to clamp the front end face of the bearing 24; 3. Install the indicator 14 on the indicator base 11, and the indicator probe... 1. With the indicator facing horizontally backward, bring the probe of indicator 14 into contact with the bearing front cover 26 and tighten the indicator locking screw; 2. Adjust the locking screw outside the sleeve II 20 of the front cover clamping claw 12 to bring the front cover clamping claw 12 into contact with the bearing front cover 26; 3. After turning the torque wrench 6 and hearing a "click" sound, rotate the outer dial of indicator 14 until the long pointer of indicator 14 points to 0 (or you can leave the outer dial unrotated); 4. Turn the torque wrench 6 in the opposite direction until the "click" sound remains unchanged. At this point, you can read the bearing clearance value from indicator 14 (when the dial is not rotated, you can directly read the pointer change, which is the bearing clearance value being measured).

[0023] The above embodiments are merely preferred embodiments of the present invention. The structure of the present invention is not limited to the forms listed in the above embodiments. Any modifications, equivalent substitutions, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for measuring the axial clearance of railway wheelset bearings, characterized in that, The components include a spindle (1), a sliding sleeve (5), a torque wrench (6), a bearing end face positioning claw (4), a bearing end clamping claw (9), a cam (7), a cam handle (8), a gauge base (11), an indicator (14), a rear stop positioning claw (3), and a front cover clamping claw (12). The inner side of the sliding sleeve (5) is provided with a sliding hole that penetrates the front and rear end faces of the sliding sleeve (5). The spindle (1) is set in the sliding hole of the sliding sleeve (5) and its two ends protrude from the front and rear ends of the sliding hole. The torque wrench (6) is connected to the outer side of the middle part of the sliding sleeve (5) through a connecting device. When the torque wrench (6) is pushed, the sliding sleeve (5) can be positioned relative to the spindle (1). The two bearing end face positioning claws (4) are symmetrically connected to the two rear ends of the sliding sleeve (5) through a connecting device. The upper front end of the sliding sleeve (5) is provided with a mounting groove (18). The cam (7) is located at the rear end of the mounting groove (18). One end of the cam handle (8) passes through the side wall of the mounting groove (18) and is connected to the cam (7). The bearing end clamping claw (9) includes a driving link (17) and two front end clamping claws (27) symmetrically connected to the two front end clamping claws (27) on both sides of the front end of the driving link (17). The driving link (17) is connected to the middle of the two front end clamping claws (27) and extends upward and backward. The drive link (17) is provided with a positioning hole that runs through its front and rear surfaces at the connection between it and the two front clamping claws (27). The upper side of the positioning hole of the drive link (17) is provided with a hinge hole. The bearing end clamping claw (9) is sleeved on the outer surface of the spindle (1) at the front end of the sliding sleeve (5) through the positioning hole. The drive link (17) is hinged to the front end of the mounting groove (18) through the pin (19). The end of the drive link (17) extends backward and upward to the upper side of the cam (7). When the cam handle (8) is rotated, the cam (7) rotates and pushes the drive link (17) to swing upward, so that the two front clamping claws (27) swing backward to clamp the shaft. The front end of the bearing (24) is connected to the upper end of the base (11) and the front end of the sliding sleeve (5). The lower end of the base (11) extends backward and downward. The probe of the indicator (14) is installed horizontally backward at the lower end of the base (11). The rear stop positioning claw (3) is sleeved on the outer surface of the spindle (1) at the rear end of the sliding sleeve (5). The front cover clamping claw (12) is sleeved on the outer surface of the spindle (1) at the front end of the bearing end clamping claw (9). The outer surface of the spindle (1) behind the rear stop positioning claw (3) is connected to the rear locking nut (2). The outer surface of the spindle (1) in front of the front cover clamping claw (12) is connected to the front locking nut (13).

2. The railway wheelset bearing axial clearance measuring device as described in claim 1, characterized in that, The bearing end face positioning claw (4) has a positioning step (16) at the bottom of its inner side that is positioned relative to the bearing (24) end face.

3. The railway wheelset bearing axial clearance measuring device as described in claim 1, characterized in that, The outer surface of the sliding sleeve (5) is also provided with two outer diameter claws (10) that can be positioned on the outer surface of the bearing (24). The two outer diameter claws (10) are symmetrically connected on opposite sides of the sliding sleeve (5).

4. The railway wheelset bearing axial clearance measuring device as described in claim 1, characterized in that, The base (11) is in the shape of an inverted L. The base (11) includes a horizontal arm and a vertical arm connected to the front end of the horizontal arm. The indicator (14) is connected to the bottom end of the vertical arm by the indicator locking pin (15).

5. The railway wheelset bearing axial clearance measuring device as described in claim 1, characterized in that, The rear stop positioning claw (3) includes a sleeve I (22) and a positioning claw I (23) connected to the bottom end of the sleeve I (22). The sleeve I (22) is fixed to the surface of the spindle (1) by a locking screw, and the inner surface of the positioning claw I (23) is a flat positioning surface.

6. The railway wheelset bearing axial clearance measuring device as described in claim 1, characterized in that, The front cover clamping claw (12) includes a sleeve II (20) and a positioning claw II (21) connected to the bottom end of the sleeve II (20). The sleeve II (20) is fixed to the surface of the spindle (1) by a locking screw, and the inner surface of the bottom end of the positioning claw II (21) is a flat positioning surface.

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