Contact angle measuring device for angular contact bearing

Abstract

The utility model discloses a contact angle measuring device for an angular contact bearing, which is applied to the technical field of contact angle measuring devices, and is characterized in that the contact angle measuring device comprises a measuring base with a circular structure; 360-degree graduation scales are carved on the circumferential edge of the measuring base, at least three groups of bearing positioning assemblies used for positioning the angular contact bearing at the central position of the measuring base are uniformly arranged on the measuring base in the circumferential direction, and meanwhile, a loading ball which is placed and fixed on an inner ring of the angular contact bearing and is attached to the inner ring is also arranged on the measuring base; the outer ring of the measuring base is rotatably connected with a reading needle used for reading the rotation angle reading of the retainer along the circumferential direction based on the arc-shaped sliding assembly. The device has the technical effects of simple structure, wide adaptation range and low measurement cost.

Description

Technical Field

[0001] The utility model relates to the technical field of contact angle measuring devices, in particular to a contact angle measuring device for angular contact bearings. Background Art

[0002] Ultra-precision angular contact bearings are mostly used in industrial machine tools, machining centers, servo guides, etc., and have an important influencing factor on the overall operation and machining accuracy of the equipment. The contact angle of the angular contact bearing indicates the direction of force transmission between the steel balls and the cage inside the bearing, and reflects the bearing's ability to bear radial loads and axial loads. The contact angle affects the bearing's load-bearing capacity, bearing stiffness, and shafting rigidity. Testing the bearing contact angle can understand the actual contact angle of the bearing, which is very important for the production and use of paired bearings.

[0003] The contact angle measuring instruments for angular contact ball bearings currently sold on the market are relatively expensive and have complex structures. They are not suitable for situations where there are many bearing models and a large range of measurements are required during factory production, and need to be improved. Utility Model Content

[0004] The utility model aims to provide a contact angle measuring device for angular contact bearings, which has the advantages of simple structure, wide adaptability and low measurement cost.

[0005] The above technical objectives of the present utility model are achieved through the following technical solutions: a contact angle measuring device for angular contact bearings, comprising a measuring base with a circular structure; the circumference of the measuring base is engraved with a 360-degree graduation scale, at least three groups of bearing positioning assemblies for positioning the angular contact bearing at the center of the measuring base are evenly arranged on the measuring base along the circumferential direction, and a loading ball is also provided for placing and fixing on the inner ring of the angular contact bearing and fitting with the inner ring, and a reading needle for reading the cage angle reading is connected to the outer ring of the measuring base based on an arc-shaped sliding assembly and rotated along the circumferential direction.

[0006] The utility model is further configured as follows: the bearing positioning assembly includes an adjustment slot opened on the measuring base along the diameter direction of the measuring base and an adjustment slider slidably connected to the adjustment slot; the adjustment slider is rotatably connected to a locking positioning block for pressing and fixing the adjustment slider in the adjustment slot and for abutting against the outer wall of the positioning angular contact bearing.

[0007] The utility model is further configured as follows: three groups of bearing positioning assemblies are provided, and the angle between adjacent bearing positioning assemblies is 120 degrees.

[0008] The present invention is further configured as follows: the adjustment groove is engraved with an adjustment graduation scale along the diameter direction of the measuring base for adjusting the position of the adjustment slider in the adjustment groove to ensure that the angular contact bearing can be positioned at the center position of the measuring base.

[0009] The utility model is further configured as follows: the arc-shaped sliding assembly includes an arc-shaped slide groove opened on the outside of the measuring base along the circumferential direction and an arc-shaped slider slidably connected to the arc-shaped slide groove along the circumferential direction; a mounting block is fixedly connected to the arc-shaped slider; the reading needle is fixedly connected to the mounting block along the diameter direction of the measuring base; and the arc-shaped slider is provided with a scale line corresponding to the 360-degree graduation scale at the downward projection position of the reading needle.

[0010] The utility model is further configured as follows: a rotating block is coaxially fixedly connected to the top of the loading ball and drives the loading ball and the inner ring of the angular contact bearing to rotate synchronously.

[0011] In summary, the present invention has the following beneficial effects:

[0012] 1. The measuring base is equipped with multiple bearing positioning assemblies for positioning the angular contact bearing at the center of the measuring base, and loading balls are placed on the inner ring of the angular contact bearing to fit the inner ring. Pressure is applied to the inner ring of the bearing by the loading balls to achieve synchronous movement with the inner ring of the bearing. Before measurement, the inner ring, outer ring, and cage of the angular contact bearing are marked on the same side of the diameter line, corresponding to the 0-degree position of the 360-degree indexing scale. The loading balls are then rotated to cause the inner ring of the bearing to rotate precisely and synchronously for 10 revolutions. After the rotation is completed, the angle between the inner ring and the cage is obtained by comparing the reading needle with the 360-degree indexing scale. The contact angle of the angular contact bearing is then calculated using a formula. This method has a simple structure and reduces measurement costs.

[0013] 2. By arranging at least three sets of bearing positioning assemblies along the circumferential direction on the measuring base, the bearing positioning assembly opens an adjustment groove on the measuring base and slides the adjustment slider in the adjustment groove, and at the same time, a locking positioning block for abutting the outer wall of the angular contact bearing is fixedly provided on the adjustment slider. By abutting the outer wall of the bearing through multiple sets of locking positioning blocks, the angular contact bearing is positioned in the center position of the measuring base, and the position of the adjustment slider in the adjustment groove can be flexibly adjusted to adapt to the measurement requirements of angular contact bearings of different specifications and sizes, thereby improving the adaptation range. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of this embodiment;

[0015] Figure 2 yes Figure 1 A magnified schematic diagram of part A;

[0016] Figure 3 is Figure 1 a partial enlarged schematic view of B.

[0017] Fig. 1 is a measurement base; 2 is a 360-degree scale; 3 is a bearing positioning assembly; 31 is an adjusting sliding groove; 32 is an adjusting sliding block; 33 is a locking positioning block; 34 is an adjusting scale; 4 is a loading ball; 41 is a rotating block; 5 is an arc sliding assembly; 51 is an arc sliding groove; 52 is an arc sliding block; 53 is a mounting block; 54 is a scale line; 6 is a reading needle. DETAILED DESCRIPTION

[0018] The utility model will be further explained in detail below in combination with the drawings.

[0019] Embodiment:

[0020] Referring to Figures 1 to 3 , a contact angle measuring device for angular contact bearings, comprising a measurement base 1 in a circular configuration, a 360-degree scale 2 is engraved on the circumference of the measurement base 1, at least three groups of bearing positioning assemblies 3 for positioning the angular contact bearing at the center position of the measurement base 1 are uniformly arranged on the measurement base 1 along the circumferential direction, and a loading ball 4 fixed to the inner ring of the angular contact bearing and in contact with the inner ring is also arranged, the top of the loading ball 4 is coaxially fixedly connected with a rotating block 41 for driving the loading ball 4 and the inner ring of the angular contact bearing to rotate synchronously, and the reading needle 6 for reading the rotation angle of the retainer is rotationally connected on the outer ring of the measurement base 1 along the circumferential direction based on the arc sliding assembly 5, before measurement, the inner ring, the outer ring and the retainer of the angular contact bearing are marked on the same side along the diameter line and correspond to the 0-degree position of the 360-degree scale 2 and are marked with a line, then the loading ball 4 is rotated to drive the bearing inner ring to rotate accurately and synchronously for 10 times, after rotation is completed, the included angle Δy between the inner ring and the retainer is obtained by the reading needle 6 against the 360-degree scale 2, and the contact angle of the angular contact bearing is calculated by the formula, wherein the formula for obtaining the contact angle based on the included angle between the inner ring and the retainer is as follows:

[0021]

[0022] Wherein, αK=contact angle of angular contact bearing;

[0023] Dw=diameter of the rolling ball of the angular contact ball bearing;

[0024] Dd=diameter of the ball joint of the angular contact ball bearing;

[0025] Δy=deviation degree of 4 times retainer rotation after 10 times rotation of the inner ring of the angular contact ball bearing;

[0026] Note: Δy=(1800×(Dd-Dw×cosαK) / Dd)-1440.

[0027] refer to Figure 1 and Figure 2 Specifically, the bearing positioning assembly 3 includes an adjustment slot 31 defined along the diameter of the measuring base 1 and an adjustment slider 32 slidably connected to the adjustment slot 31. A locking block 33 is rotatably connected to the adjustment slider 32, which is used to press and secure the adjustment slider 32 within the adjustment slot 31 and abut against the outer wall of the angular contact bearing. An adjustment scale 34 is engraved along the diameter of the measuring base 1 to adjust the position of the adjustment slider 32 within the adjustment slot 31, ensuring that the angular contact bearing is positioned at the center of the measuring base 1. Multiple sets of locking blocks 33 abut the outer wall of the bearing, thereby positioning the angular contact bearing at the center of the measuring base 1. The position of the adjustment slider 32 within the adjustment slot 31 can be flexibly adjusted to accommodate the measurement needs of angular contact bearings of different sizes, thereby increasing the range of adaptability. In this embodiment, three sets of bearing positioning assemblies 3 are provided, with the angle between adjacent bearing positioning assemblies 3 being 120 degrees.

[0028] refer to Figure 1 and Figure 3 Specifically, the arc sliding assembly 5 includes an arc chute 51 opened on the outer side of the measuring base 1 along the circumferential direction and an arc slider 52 slidably connected to the arc chute 51 along the circumferential direction. A mounting block 53 is fixedly connected to the arc slider 52. The reading needle 6 is fixedly connected to the mounting block 53 along the diameter direction of the measuring base 1. A scale line 54 corresponding to the 360-degree graduation scale 2 is provided at the downward projection position of the reading needle 6 on the arc slider 52. When the test is completed, it is necessary to measure the inner circle and When the angle Δy between the retainers is Δy, the arc-shaped slider 52 is driven to slide in the arc-shaped slot 51 so that the needle tip of the reading needle 6 corresponds to the marked position of the retainer of the angular contact bearing and the scale line 54 is compared with the 360-degree graduation scale 2 to read the angle between the marked position of the retainer of the angular contact bearing at this time and the 0-degree position. Since the inner ring of the angular contact bearing has rotated exactly 10 revolutions, the marked position of the inner ring is the 0-degree position, and the angle between the inner ring and the retainer is calculated.

[0029] Brief description of use: the angular contact bearing is positioned in the center of the measuring base 1 by the abutment of the locking positioning blocks 33 against the bearing outer wall, then the loading ball 4 is used to apply pressure to the bearing inner ring to achieve synchronous movement of the loading ball 4 and the bearing inner ring, the inner ring, the outer ring and the retainer of the angular contact bearing are marked on the same side along the diameter line before measurement, corresponding to the 0 degree position of the 360 degree scale 2, then the loading ball 4 is rotated to drive the bearing inner ring to rotate synchronously for 10 turns, after the rotation is completed, the included angle between the inner ring and the retainer is obtained by reading the needle 6 against the 360 degree scale 2, and the contact angle of the angular contact bearing is calculated by the formula.

[0030] The specific embodiment is only an explanation of the utility model, and is not a limitation of the utility model. Those skilled in the art can make modifications with creative contributions according to the needs after reading the specification, but as long as it is within the scope of the claims of the utility model, it is protected by the patent law.

Claims

1. A contact angle measuring device for an angular contact bearing, comprising a measuring base (1) having a circular structure; characterized in that: The circumference of the measuring base (1) is engraved with a 360-degree graduation scale (2). The measuring base (1) is evenly provided with at least three groups of bearing positioning components (3) for positioning the angular contact bearing at the center of the measuring base (1) along the circumferential direction. A loading ball (4) is also provided for placing and fixing on the inner ring of the angular contact bearing and fitting with the inner ring. A reading needle (6) for reading the angle of the cage is connected to the outer ring of the measuring base (1) based on an arc-shaped sliding component (5) and rotates along the circumferential direction.

2. A contact angle measuring device for angular contact bearings according to claim 1, characterized in that: The bearing positioning assembly (3) comprises an adjusting slot (31) provided on the measuring base (1) along the diameter direction of the measuring base (1) and an adjusting slider (32) slidably connected to the adjusting slot (31); a locking positioning block (33) is rotatably connected to the adjusting slider (32) for pressing and fixing the adjusting slider (32) in the adjusting slot (31) and for abutting against the outer wall of the positioning angular contact bearing.

3. A contact angle measuring device for angular contact bearings according to claim 2, characterized in that: The bearing positioning components (3) are provided in three groups, and the included angle between adjacent bearing positioning components (3) is 120 degrees.

4. A contact angle measuring device for angular contact bearings according to claim 2, characterized in that: The adjusting slot (31) is provided with an adjusting graduation scale (34) along the diameter direction of the measuring base (1) for adjusting the position of the adjusting slider (32) in the adjusting slot (31) to ensure that the angular contact bearing can be positioned at the center position of the measuring base (1).

5. The contact angle measuring device for angular contact bearings according to claim 1, characterized in that: The arc-shaped sliding assembly (5) comprises an arc-shaped sliding groove (51) provided on the outer side of the measuring base (1) along the circumferential direction and an arc-shaped sliding block (52) slidably connected to the arc-shaped sliding groove (51) along the circumferential direction, a mounting block (53) being fixedly connected to the arc-shaped sliding block (52), the reading needle (6) being fixedly connected to the mounting block (53) along the diameter direction of the measuring base (1), and a scale line (54) for comparing with the 360-degree graduation scale (2) being provided on the arc-shaped sliding block (52) at a downward projection position of the reading needle (6).

6. The contact angle measuring device for angular contact bearings according to claim 1, characterized in that: The top of the loading ball (4) is coaxially fixedly connected to a rotating block (41) that drives the loading ball (4) and the inner ring of the angular contact bearing to rotate synchronously.

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