Measuring tool for spherical raceway of rotary bearing

Abstract

The utility model relates to industrial measurement technical field, concretely relates to a kind of rotary table bearing spherical raceway measuring tool, including measuring rod, fixed end mounting plate, fixed end measuring ball, measuring mechanism and measuring table;The measuring mechanism includes measuring end mounting plate, support assembly and measuring end measuring ball, the measuring end mounting plate and the fixed end mounting plate are fixed on the measuring rod with interval, the fixed end measuring ball is vertically fixed on the fixed end mounting plate, the measuring end measuring ball is connected on the measuring end mounting plate by support assembly, the measuring end measuring ball and the fixed end measuring ball are set back to and on same axis, the back of the measuring end measuring ball is equipped with lengthening rod, the lengthening rod passes through the measuring end and is connected with the measuring table.The utility model is supported to the measuring end measuring ball by support assembly, reduces the deformation caused by the weight of measuring end measuring ball, improves the measurement accuracy, solves the technical problem that the result error of the existing rotary table bearing spherical raceway measuring tool measurement is larger.

Description

Technical Field

[0001] This utility model relates to the field of industrial measuring tools, and in particular to a measuring fixture for the spherical raceway of a turntable bearing. Background Technology

[0002] Slewing bearings are generally large in size, and the most accurate method for measuring their raceway diameter is using a coordinate measuring machine (CMM). However, CMM is costly and generally used for random sampling. Currently, the most common method is to use a measuring ruler for comparative measurement. The structure of a slewing bearing ball raceway dimension measuring ruler is generally as described in Chinese Patent CN206459600U. This patent modifies existing measuring tools, reducing the difficulty of changing the measurement direction of the measuring hemisphere, simplifying the operation steps, making the operation simpler and more convenient, and improving measurement accuracy and ease of inspection.

[0003] However, for slewing bearings with larger ball diameters, the measuring steel balls need to be placed into the raceway during testing. This requires compressing the measuring balls and the dial indicator. The larger the ball diameter of the slewing bearing, the greater the required compression, which in turn necessitates a longer connecting rod for the dial indicator. This connecting rod needs to be connected to a standard dial indicator; the longer it is, the less rigid it becomes, leading to larger measurement errors. Utility Model Content

[0004] The main purpose of this utility model is to provide a measuring fixture for the spherical raceway of a slewing bearing, which aims to solve the technical problem of large measurement errors in existing spherical raceway measuring tools for slewing bearings.

[0005] To achieve the above objectives, this utility model proposes a measuring fixture for spherical raceways of slewing bearings, comprising a measuring rod, a fixed-end mounting plate, a fixed-end measuring ball, a measuring mechanism, and a measuring gauge. The measuring mechanism includes a measuring-end mounting plate, a support assembly, and a measuring ball. The measuring-end mounting plate and the fixed-end mounting plate are fixedly fixed to the measuring rod at intervals. The fixed-end measuring ball is vertically fixed to the fixed-end mounting plate and connected to the measuring-end mounting plate via the support assembly. The measuring-end measuring ball and the fixed-end measuring ball are arranged back-to-back and on the same axis. The curvature of the measuring-end measuring ball and the fixed-end measuring ball is equal to the curvature of the raceway being measured. An extension rod is provided on the back of the measuring-end measuring ball, which passes through the measuring end and connects to the measuring gauge.

[0006] The present invention further improves the measuring fixture for the spherical raceway of a turntable bearing by comprising a support rod, an elastic element, and an annular slider. The annular slider is slidably mounted on the extended rod. The measuring end mounting plate is provided with a groove for the first end of the support rod to be slidably mounted. The elastic element is connected between the end of the groove and the first end of the support rod. The second end of the support rod is connected to the annular slider.

[0007] The spherical raceway measuring fixture of this utility model is further improved in that the end of the slide is provided with a fixed block, the first end of the support rod is connected to a slider, and the elastic element is connected between the fixed block and the slider.

[0008] The spherical raceway measuring fixture of this utility model is further improved in that the fixing block is located at the end of the slide groove away from the extension rod, and the elastic element is a compression spring.

[0009] The spherical raceway measuring fixture of this utility model is further improved in that the end of the extended rod near the fixed end of the measuring ball is provided with a stepped surface that contacts the annular slider.

[0010] The spherical raceway measuring fixture for turntable bearings of this invention is further improved in that the number of the support rod and the slide groove are both at least three, and they are installed in a one-to-one correspondence.

[0011] The spherical raceway measuring fixture of this utility model is further improved in that the fixed end measuring ball and the measuring end measuring ball are hollow structures or made of ceramic material.

[0012] The spherical raceway measuring fixture of this utility model is further improved in that the measuring rod is made of carbon fiber.

[0013] The technical solution of this utility model has the following beneficial effects: This utility model discloses a spherical raceway measuring fixture for rotary bearings. By supporting the measuring ball at the measuring end with a support assembly, it reduces deformation caused by the weight of the measuring ball, improves measurement accuracy, and solves the technical problem of large measurement errors in existing rotary bearing spherical raceway measuring tools. This utility model reduces deformation caused by the weight of the measuring ball by using ceramic or hollow measuring balls, and reduces the influence of temperature on the measurement length by using a carbon fiber measuring rod, thus improving measurement accuracy. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the measurement state of the measuring fixture for the spherical raceway of the turntable bearing of this utility model; Figure 2 This is a schematic diagram of the measuring mechanism of the rotary bearing spherical raceway measuring fixture of this utility model; Figure 3 This is a schematic diagram showing the connection of the elastic element of the measuring fixture for the spherical raceway of the turntable bearing of this utility model; Figure 4 This is a schematic diagram of the measuring end of the ball measuring fixture for measuring the spherical raceway of a turntable bearing according to this utility model.

[0016] Explanation of icon numbers: 1. Measuring rod; 2. Fixed end mounting plate; 3. Fixed end measuring ball; 4. Measuring mechanism; 5. Measuring gauge; 6. Slewing bearing; 7. Measuring end mounting plate; 8. Measuring end measuring ball; 9. Support rod; 10. Annular slider; 11. Slider; 12. Fixing block; 13. Elastic element; 14. Connecting pin; 15. Extension rod; 16. Stepped surface; 17. Slide groove. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0019] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0020] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0022] like Figures 1-4 As shown, this utility model proposes a measuring fixture for the spherical raceway of a turntable bearing, including a measuring rod 1, a fixed end mounting plate 2, a fixed end measuring ball 3, a measuring mechanism 4, and a measuring gauge 5. The measuring mechanism 4 includes a measuring end mounting plate 7, a support assembly, and a measuring end measuring ball 8. The measuring end mounting plate 7 and the fixed end mounting plate 2 are fixedly fixed to the measuring rod 1 at intervals. The fixed end measuring ball 3 is vertically fixed to the fixed end mounting plate 2. The measuring end measuring ball 8 is connected to the measuring end mounting plate 7 through the support assembly. The measuring end measuring ball 8 and the fixed end measuring ball 3 are arranged back to back and on the same axis. An extension rod 15 is provided on the back of the measuring end measuring ball 8. The extension rod 15 passes through the measuring end and connects to the measuring gauge 5.

[0023] Specifically, the measuring instrument 5 uses a standard dial indicator. The measuring end mounting plate 7 and the fixed end mounting plate 2 are fixed to the measuring rod 1 by screws or clips (not shown in the drawing), ensuring that after installation, the axes of the measuring end ball 8 and the fixed end ball 3 are concentric, and their axes are in the same plane as the axis of the measuring rod 1. The fixed end ball 3 is mounted on the fixed end mounting plate 2, with no relative movement between them. The measuring end ball 8 and the measuring rod are connected to the measuring instrument 5 by threads (not shown in the drawing).

[0024] Preferably, such as Figure 2 As shown, the support assembly includes a support rod 9, an elastic element 13, and an annular slider 10. The annular slider 10 is slidably mounted on the extension rod 15. The measuring end mounting plate 7 is provided with a groove 17 for the first end of the support rod 9 to be slidably mounted. The elastic element 13 is connected between the end of the groove 17 and the first end of the support rod 9. The second end of the support rod 9 is connected to the annular slider 10.

[0025] Preferably, such as Figure 3 As shown, a fixing block 12 is provided at the end of the slide groove 17, and a slider 11 is connected to the first end of the support rod 9. The elastic element 13 is connected between the fixing block 12 and the slider 11. Specifically, the cross-section of the slide groove 17 is T-shaped, and the shape of the slider 11 is adapted to the shape of the slide groove 17, thereby preventing the slider 11 from falling out of the slide groove 17. Both the slider 11 and the annular slider 10 are provided with ear plates for connecting the support rod 9, and a rotatable connection is achieved by connecting pins 14 passing through the ear plates.

[0026] Preferably, the fixing block 12 is located at the end of the slide groove 17 away from the extension rod 15, and the elastic element 13 is a compression spring that is always under pressure during use, thereby generating elastic force in both directions.

[0027] Preferably, such as Figure 4 As shown, the extended rod 15 has a stepped surface 16 at one end near the fixed end measuring ball 3 that contacts the annular slider 10.

[0028] Preferably, there are at least three support rods 9 and three sliding grooves 17, and they are installed in a one-to-one correspondence. The three sliding grooves 17 are arranged in a radiating pattern with the extension rod 15 as the center.

[0029] Preferably, the fixed end measuring ball 3 and the measuring end measuring ball 8 are hollow structures or made of ceramic material, and both the fixed end measuring ball 3 and the measuring end measuring ball 8 are hemispherical in shape to reduce deformation caused by the weight of the measuring ball and improve measurement accuracy.

[0030] Preferably, the measuring rod 1 is made of carbon fiber, which can reduce the influence of temperature on the measuring length. Alternatively, high-strength materials such as steel can be used.

[0031] like Figure 1 As shown, before measurement, the distance between the fixed-end measuring ball 3 and the measuring-end measuring ball 8 is adjusted to the diameter of the raceway of the slewing bearing 6. During measurement, the fixed-end measuring ball 3 is first placed in the raceway of the slewing bearing. The measuring-end measuring ball 8 is compressed, and the stepped surface 16 of the measuring-end measuring ball 8 abuts against the annular slider 10, causing the circular slider 11 to drive the support rod 9. The support rod 9 drives the slider 11 to move linearly in the slide groove 17. At this time, the distance between the fixed-end measuring ball 3 and the measuring-end measuring ball 8 is less than the diameter of the raceway of the slewing bearing 6, so the measuring-end measuring ball 8 can be placed in the raceway of the slewing bearing. The compression of the measuring-end measuring ball 8 is stopped, and at this time, the measuring-end measuring ball 8 abuts against the raceway of the slewing bearing 6. Keeping the fixed-end measuring ball 3 close to the raceway, the measuring-end measuring ball 8 is moved along the raceway, and the diameter of the raceway of the slewing bearing 6 is read through the measuring dial 5.

[0032] This utility model discloses a spherical raceway measuring fixture for rotary bearings. By supporting the measuring ball 8 at the measuring end with a support assembly, it reduces deformation caused by the weight of the measuring ball 8, improves measurement accuracy, and solves the technical problem of large measurement errors in existing rotary bearing spherical raceway measuring tools. This utility model reduces deformation caused by the weight of the measuring ball by using ceramic or hollow measuring balls, and the carbon fiber measuring rod 1 reduces the influence of temperature on the measurement length, further improving measurement accuracy.

[0033] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A measuring fixture for the spherical raceway of a slewing bearing, characterized in that, The device includes a measuring rod (1), a fixed end mounting plate (2), a fixed end measuring ball (3), a measuring mechanism (4), and a measuring table (5). The measuring mechanism (4) includes a measuring end mounting plate (7), a support assembly, and a measuring end measuring ball (8). The measuring end mounting plate (7) and the fixed end mounting plate (2) are fixed to the measuring rod (1) at intervals. The fixed end measuring ball (3) is vertically fixed to the fixed end mounting plate (2). The measuring end measuring ball (8) is connected to the measuring end mounting plate (7) through the support assembly. The measuring end measuring ball (8) and the fixed end measuring ball (3) are arranged back to back and on the same axis. The curvature of the measuring end measuring ball (8) and the fixed end measuring ball (3) is equal to the curvature of the raceway being measured. An extension rod (15) is provided on the back of the measuring end measuring ball (8). The extension rod (15) passes through the measuring end and connects to the measuring table (5).

2. The spherical raceway measuring fixture for turntable bearings as described in claim 1, characterized in that, The support assembly includes a support rod (9), an elastic element (13), and an annular slider (10). The annular slider (10) is slidably mounted on the extension rod (15). The measuring end mounting plate (7) is provided with a groove (17) for the first end of the support rod (9) to be slidably mounted. The elastic element (13) is connected between the end of the groove (17) and the first end of the support rod (9). The second end of the support rod (9) is connected to the annular slider (10).

3. The measuring fixture for the spherical raceway of a turntable bearing as described in claim 2, characterized in that, The end of the slide (17) is provided with a fixing block (12), the first end of the support rod (9) is connected to a slider (11), and the elastic element (13) is connected between the fixing block (12) and the slider (11).

4. The spherical raceway measuring fixture for turntable bearings as described in claim 3, characterized in that, The fixing block (12) is located at the end of the slide (17) away from the extension rod (15), and the elastic element (13) is a compression spring.

5. The spherical raceway measuring fixture for turntable bearings as described in claim 2, characterized in that, The extended rod (15) has a stepped surface (16) that contacts the annular slider (10) at one end near the fixed end measuring ball (3).

6. The measuring fixture for the spherical raceway of a turntable bearing as described in claim 2, characterized in that, The number of the support rod (9) and the slide (17) is at least three, and they are installed in a one-to-one correspondence.

7. The measuring fixture for the spherical raceway of a turntable bearing as described in claim 1, characterized in that, The fixed end measuring ball (3) and the measuring end measuring ball (8) are hollow structures or made of ceramic material.

8. The spherical raceway measuring fixture for slewing bearings as described in claim 1, characterized in that, The measuring rod (1) is made of carbon fiber.

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