A gauge for detecting the raceway width of the outer ring of a cylindrical roller bearing.

Abstract

This utility model discloses a fixture for detecting the raceway width of the outer ring of a cylindrical roller bearing, belonging to the technical field of bearing production equipment. It includes a first fixture body and a second fixture body with sliding fit. The first and second fixture bodies have the same structure, each having a first end and a second end. The first and second ends have a first abutment surface and a second abutment surface located on the same plane. The first and second abutment surfaces are used to abut against the inner stepped ring end faces of the bearing outer ring on opposite sides. The first fixture body has a first detection surface and a first flange, and the second fixture body has a second detection surface and a second flange. The distance 'a' between the two ends of the first detection surface is equal to the minimum value of the bearing outer ring raceway surface detection, and the distance 'b' between the two ends of the second detection surface is equal to the maximum value of the bearing outer ring raceway surface detection. This utility model has a simple and practical structure, is easy to operate, and is suitable for mass bearing inspection.

Description

Technical Field

[0001] This utility model belongs to the technical field of bearing production equipment, and specifically relates to a gauge for detecting the width of the raceway of the outer ring of a cylindrical roller bearing. Background Technology

[0002] Bearings, often referred to as the "food of the machinery industry," provide support for shafts housing components such as wheels, gears, turbines, and rotors, ensuring smooth rotation. They are essential components in the vast majority of machines. NF, NCF, and NNCF type cylindrical roller bearings are widely used in large motors, machine tool spindles, engine front and rear support shafts, train and passenger car axle supports, diesel engine crankshafts, and automotive and tractor gearboxes—machines indispensable in daily life. These bearings share a common structural feature: one end of the outer ring has a flange, and the other end has an annular groove for a locking ring. The dimension between the inner end face of the flange and the groove position determines the installation position dimension along the length of the roller, i.e., the raceway width. If this dimension is too small, the rollers may get stuck; if it is too large, the rollers may move back and forth during operation, causing tilting and affecting the bearing's performance and lifespan.

[0003] Currently, there are many methods and gauges available for inspecting the width of the raceway surface of bearing outer rings, mainly falling into three categories: First, using a coordinate measuring machine (CMM). This method provides accurate and high-precision readings, but for batches of bearings with tens of thousands of sets, individual CMM inspection is inefficient and time-consuming. Furthermore, for smaller bearings, the CMM may not be able to enter the raceway. Second, manufacturing specialized instruments for inspection. These instruments have many parts, are complex to assemble, have high manufacturing costs, and are difficult to operate. (Refer to...) Figure 1 and Figure 2 The third method involves creating a template fixture for inspection 5. However, this type of template is only attached to one end face of the inner cylindrical step. During manual inspection, this can easily lead to the inspection surface not fitting flush with the end face of the bearing's inner step ring, resulting in a larger inspection error. Therefore, we propose a fixture for inspecting the raceway width of cylindrical roller bearings to improve upon the shortcomings of the existing template fixture 5. Utility Model Content

[0004] The purpose of this invention is to provide a gauge for detecting the width of the raceway of the outer ring of a cylindrical roller bearing, thereby solving the problems existing in the prior art described in the background.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A fixture for detecting the width of the raceway of the outer ring of a cylindrical roller bearing includes a first fixture body and a second fixture body that are in sliding fit. The first fixture body and the second fixture body have the same structure, each having a first end and a second end. The first end and the second end have a first abutting surface and a second abutting surface located on the same plane. The first abutting surface and the second abutting surface are used to abut against the end faces of the inner stepped ring of the outer ring of the bearing on opposite sides. The first fixture body has a first detection surface and a first flange. The second fixture body has a second detection surface and a second flange. The distance a between the two ends of the first detection surface is equal to the minimum value of the outer ring raceway surface being detected, and the distance b between the two ends of the second detection surface is equal to the maximum value of the outer ring raceway surface being detected.

[0007] Furthermore, both the first and second detection surfaces are provided with grooves.

[0008] Furthermore, the first end is provided with a 60° chamfer, and the first inspection fixture body and the second inspection fixture body respectively form inclined surfaces.

[0009] Furthermore, the first abutment surface is provided with a recessed portion, the recessed portion is slidably connected to a slide block, the slide block includes a support plate, the top surface of the support plate is provided with mutually parallel slide rails at intervals, the first inspection fixture body and the second inspection fixture body are respectively provided with sliders located in the recessed portion, the sliders are slidably connected to the slide rails, and the ends of the slide rails are provided with baffles.

[0010] Furthermore, the recessed portion is provided with a sliding rod, the sliding block is slidably sleeved on the sliding rod, a second spring is sleeved on the sliding rod between the baffle and one side of the recessed portion, and a first spring is provided between the other side of the recessed portion and the slider.

[0011] Compared with the shortcomings and deficiencies of the prior art, the present invention has the following beneficial effects.

[0012] 1. This utility model provides a fixture for detecting the raceway width of the outer ring of a cylindrical roller bearing. It employs a first fixture body and a second fixture body for coordinated detection. Compared to existing template fixtures, the distance 'a' between the two ends of the first detection surface represents the minimum width of the bearing outer ring raceway, and the distance 'b' between the two ends of the second detection surface represents the maximum width of the bearing outer ring raceway. This coordinated approach facilitates accurate screening of qualified bearing outer rings within the detection range. Furthermore, the first and second fixture bodies are respectively provided with a first abutment surface and a second abutment surface. By abutting against the inner stepped ring end faces of the bearing outer ring on opposite sides, the fixture body can be flush with the inner stepped ring end faces of the bearing outer ring, thus preventing tilting of the first and second fixture bodies and ensuring detection accuracy. This utility model has a simple and practical structure, is easy to operate, and is suitable for large-scale bearing outer ring inspection.

[0013] 2. Both the first and second inspection surfaces are provided with grooves, allowing for direct observation of the contact between the first or second inspection surface and the raceway surface, facilitating quick and accurate judgment of inspection results. The first contact surface features a combination structure of a groove and a slide. On one hand, the support plate helps ensure that the first and second inspection fixture bodies are perpendicular to the inner stepped ring end face of the bearing outer ring, reducing the risk of inspection errors caused by tilting during inspection. On the other hand, connecting the first and second inspection fixture bodies facilitates use. The recessed parts are respectively provided with a first spring and a second spring to assist the first and second inspection fixture bodies in resetting after inspection, facilitating subsequent inspection use. Attached Figure Description

[0014] Figure 1 This is a cross-sectional structural diagram of the detection state of existing inspection tools in the background art.

[0015] Figure 2 This is a schematic diagram of the existing inspection fixture in contact with the bearing outer ring raceway surface.

[0016] Figure 3 This is a schematic diagram of the structure of the first inspection fixture body in this utility model.

[0017] Figure 4 This is a schematic diagram of the structure of the second inspection fixture body in this utility model.

[0018] Figure 5 This is a schematic diagram of the structure of the inspection tool for detecting the raceway surface of the outer ring of a bearing in this utility model.

[0019] Figure 6 This is a schematic diagram of the structure of the first and second inspection fixture bodies with supporting plates in this utility model.

[0020] Figure 7 This is a schematic diagram of the connection structure between the recess and the slide in this utility model.

[0021] Figure 8 This is a schematic diagram of the connection structure between the slider and the slide rail in this utility model.

[0022] In the diagram: 1. Bearing outer ring; 2. Inner stepped ring end face; 3. Raceway surface; 4. Annular groove; 5. Template fixture; 6. First fixture body; 7. Second fixture body; 8. Second end; 9. First end; 10. Second abutment surface; 11. First abutment surface; 12. First inspection surface; 13. First flange; 14. Groove; 15. Second inspection surface; 16. Second flange; 17. Inclined surface; 18. Support plate; 19. Slide rail; 20. Baffle; 21. Slide rod; 22. Recess; 23. Slider; 24. First spring; 25. Slide seat; 26. Second spring. Detailed Implementation

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

[0024] Reference Figures 1-8 A gauge for detecting the raceway width of a cylindrical roller bearing includes a first gauge body 6 and a second gauge body 7 used in conjunction. The first gauge body 6 and the second gauge body 7 are used in conjunction to detect the raceway width of the cylindrical roller bearing. The first gauge body 6 and the second gauge body 7 have the same structure and are both plate-shaped structures. The first gauge body 6 will be used as an example for explanation.

[0025] The first inspection fixture body 6 has a first end 9 and a second end 8. The first end 9 and the second end 8 are respectively provided with a first abutment surface 11 and a second abutment surface 10 located on the same plane. The first abutment surface 11 and the second abutment surface 10 are used to abut against the inner stepped ring end face 2 of the outer ring 1 of the bearing during measurement. The first abutment surface 11 and the second abutment surface 10 are spaced apart and abut against the opposite sides of the inner stepped ring end face 2 of the outer ring 1 of the bearing, which is beneficial to the parallelism of the length direction of the first inspection fixture body 6 with the inner stepped ring end face 2 of the outer ring 1 of the bearing during detection. The first end 9 has a first detection surface 12, which is perpendicular to the first abutment surface 11. The first detection surface 12 is provided with a first flange 13 on the side away from the first abutment surface 11. When the first detection surface 12 abuts against the raceway surface 3 of the outer ring 1 of the bearing, the first flange 13 is used to embed into the annular groove 4 of the outer ring 1 of the bearing.

[0026] The difference between the first inspection fixture body 6 and the second inspection fixture body 7 is that the first inspection fixture body 6 has a first inspection surface 12 and a first flange 13, while the second inspection fixture body 7 has a second inspection surface 15 and a second flange 16. The distance between the first abutting surface 11 and the first flange 13 on the first inspection fixture body 6 is a, and the distance between the first abutting surface and the second flange 16 on the second inspection fixture body 7 is b. a is the minimum value of the raceway width of the outer ring 1 of the bearing, and b is the maximum value of the raceway width of the outer ring 1 of the bearing.

[0027] Slide the first inspection fixture body 6 and the second inspection fixture body 7 to bring the first inspection surface 12 and the second inspection surface 15 closer to the raceway surface 3 of the outer ring 1 of the bearing. When the first flange 13 abuts against the raceway surface 3 (i.e., the first flange 13 does not penetrate the annular groove 4), the second flange 16 penetrates the annular groove 4, and the second inspection surface 15 abuts against the raceway surface 3, the bearing is qualified. When the first flange 13 and the second flange 16 penetrate the annular groove 4 at the same time, the width of the raceway surface 3 is too small, and the bearing is unqualified. When both the first flange 13 and the second flange 16 abut against the raceway surface 3 and cannot penetrate the annular groove 4, the width of the raceway surface 3 is too large, and the bearing is unqualified.

[0028] In one embodiment, the first detection surface 12 and the second detection surface 15 are respectively provided with grooves 14. The grooves 14 facilitate the operator to observe the contact between the first detection surface 12 and the second detection surface 15 and the raceway surface 3, which helps to ensure the accuracy of the detection.

[0029] In one embodiment, the first ends 9 of the first gauge body 6 and the second gauge body 7 are respectively provided with a 60° chamfer to form an inclined surface 17. The inclined surface 17 helps to reduce the width of the first detection surface 12 and the second detection surface 15, thereby reducing the interference of the thickness of the first gauge body 6 and the second gauge body 7 on the detection, and helps the first detection surface 12 and the second detection surface 15 to be closer to the raceway surface 3, thereby improving the detection accuracy.

[0030] In one embodiment, the first abutting surfaces 11 of the first inspection fixture body 6 and the second inspection fixture body 7 are respectively provided with recesses 22, and slide blocks 25 are slidably embedded in the recesses 22. Specifically, the recesses 22 are provided with slide rods 21, and the slide blocks 25 are sleeved on the slide rods 21 and slidably connected to the slide rods 21. The first inspection fixture body 6 and the second inspection fixture body 7 are respectively provided with sliders 23 in the recesses 22. The slide blocks 25 include a support plate 18, and the two sides of the support plate 18 extend to the outside of the first inspection fixture body 6 and the second inspection fixture body 7 respectively. The bottom surface of the support plate 18 is flush with the first abutting surface 11. The support plate 18 is provided with two sets of slide rails 19 at intervals. The two sets of slide rails 19 are parallel to each other. The ends of the slide rails 19 are provided with baffles 20. The sliders 23 of the first inspection fixture body 6 and the second inspection fixture body 7 are slidably connected to the slide rails 19 on both sides respectively. The support plate 18 is perpendicular to the first fixture body 6 and the second fixture body 7 respectively. On the one hand, the support plate 18 can provide support for the first fixture body 6 and the second fixture body 7 during the test, and avoid the first fixture body 6 and the second fixture body 7 from tilting relative to the inner stepped ring end face 2 of the outer ring 1 of the bearing, which would cause measurement error. On the other hand, the first fixture body 6 and the second fixture body 7 are connected by the slide 25, which helps to improve the convenience of measurement.

[0031] In one embodiment, the second abutment surfaces 10 of the first abutment body 6 and the second abutment body 7 are also provided with a sliding fit structure of recess 22 and slide 25, and the structure is the same as that of the first abutment surface 11, which will not be described in detail here. The simultaneous provision of recess 22 and slide 25 on the first abutment surface 11 and the second abutment surface 10 is beneficial to improving the stability of the connection between the first abutment body 6 and the second abutment body 7.

[0032] In one embodiment, a first spring 24 is provided between the slider 23 and the side of the recess 22, where the side of the recess 22 refers to the side located near the first detection surface 11. A second spring 26 is provided between the baffle 20 and the other side of the recess 22, and the second spring 26 is sleeved on the slide rod 21. In its natural state, under the action of the first spring 24 and the second spring 26, the slider 23 is forced to abut against the baffle 20, thereby facilitating the alignment of the first inspection fixture body 6 and the second inspection fixture body 7.

[0033] When using this inspection tool for testing the raceway width of cylindrical roller bearings, the combined structure of the first inspection tool body 6 and the second inspection tool body 7 is placed on the inner stepped ring end face 2 of the outer ring 1 of the bearing. The two side support plates 18 respectively abut against the inner stepped ring end face 2 of the outer ring 1 of the bearing. That is, the first abutting surface 11 and the second abutting surface 10 respectively abut against the inner stepped ring end face 2 of the outer ring 1 of the bearing. The first inspection tool body 6 and the second inspection tool body 7 are pushed synchronously. The first flange 13 abuts against the raceway surface 3, and the first detection surface 12 does not contact the raceway surface 3. At the same time, the second flange 16 passes into the annular groove 4. The bearing that abuts against the raceway surface 3 with the second detection surface 15 is qualified. After the test, under the action of the first spring 24 and the second spring 26, the slider 23 abuts against the baffle 20, and the first inspection tool body 6 and the second inspection tool body 7 are aligned for easy retesting.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gauge for detecting the width of the raceway of an outer ring of a cylindrical roller bearing, characterized in that The first inspection fixture body (6) and the second inspection fixture body (7) are slidingly fitted. The first inspection fixture body (6) and the second inspection fixture body (7) have the same structure, both having a first end (9) and a second end (8). The first end (9) and the second end (8) have a first abutting surface (11) and a second abutting surface (10) located on the same plane. The first abutting surface (11) and the second abutting surface (10) are used to abut against the inner stepped ring end face (2) of the bearing outer ring (1) on opposite sides. The first inspection fixture body (6) has a first detection surface (12) and a first flange (13). The second inspection fixture body (7) has a second detection surface (15) and a second flange (16). The distance a between the two ends of the first detection surface (12) is the minimum value detected by the raceway surface (3) of the bearing outer ring (1). The distance b between the two ends of the second detection surface (15) is the maximum value detected by the raceway surface (3) of the bearing outer ring (1).

2. The gauge of claim 1 wherein, Both the first detection surface (12) and the second detection surface (15) are provided with grooves (14).

3. The inspection fixture for detecting the raceway width of the outer ring of a cylindrical roller bearing as described in claim 1, characterized in that, The first end (9) has a 60° chamfer, and the first inspection fixture body (6) and the second inspection fixture body (7) respectively form inclined surfaces (17).

4. The inspection fixture for detecting the raceway width of the outer ring of a cylindrical roller bearing as described in claim 1, characterized in that, The first abutment surface (11) is provided with a recess (22), the recess (22) is slidably connected to a slide block (25), the slide block (25) includes a support plate (18), the top surface of the support plate (18) is provided with parallel slide rails (19) at intervals, the first inspection fixture body (6) and the second inspection fixture body (7) are respectively provided with sliders (23) in the recess (22), the sliders (23) are slidably connected to the slide rails (19), and the end of the slide rails (19) is provided with a baffle (20).

5. The inspection fixture for detecting the raceway width of the outer ring of a cylindrical roller bearing as described in claim 4, characterized in that, The recess (22) is provided with a slide rod (21), the slide block (25) is slidably sleeved on the slide rod (21), the slide rod (21) between the baffle (20) and one side of the recess (22) is sleeved with a second spring (26), and the other side of the recess (22) is provided with a first spring (24) between the slider (23) and the slide block (22).

Images