Fastening device for measuring radial clearance of bearing
By designing a fastening device for radial clearance measurement of bearings and using digital torque display device to display and record the tightening torque, the problem of inaccurate results caused by different axial tightening forces in the radial clearance measurement of bearings is solved, and the problem of inaccurate results is achieved. The numericalization of torque and the consistency of measurement results are achieved.
Patent Information
- Application Number
- CN202411600715.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-11
- Publication Date
- 2025-01-03
AI Technical Summary
When measuring the radial clearance of the double-half inner ring angular contact ball bearing, the measurement results are not accurate enough due to different axial tightening forces, and the operating habits of different operators lead to large differences in the results.
A fastening device for measuring radial clearance of bearings is designed, including a mandrel, a fastening insert and a digital torque display device. The tightening torque is displayed and recorded through the digital torque display device to ensure that the two and half inner rings are fitted and The moment is numerical, reducing the influence of human factors.
The numericalization of the axial tightening torque in the radial clearance measurement of bearings is achieved, which reduces the difference in measurement results, and determines the most suitable tightening force through data analysis, which improves measurement accuracy and consistency.
Smart Images
Figure CN119245585A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a fastening device for measuring radial clearance of a bearing, and belongs to the technical field of measuring radial clearance of a bearing. Background Art
[0002] The method for measuring the radial clearance of a bearing is to fix a ring, apply a measuring load that can obtain a stable measured value to the unfixed ring, and make reciprocating movements in the diameter direction to perform the measurement.
[0003] The following problems exist when measuring double-half inner ring angular contact ball bearings: Due to the structural characteristics of the bearing, the inner ring is fixed and the load is applied to the outer ring during measurement. The two half inner rings need to be installed and fixed on the same spindle, and a certain axial tightening force is applied to make the two half inner rings fit together and not separate, so as to ensure that the rolling elements fall into the bottom of the groove. At present, manual methods are mostly used for axial tightening. There are differences between different operators that cannot be unified and difficult to reproduce. There is a problem of differences in the radial clearance measurement results of double-half inner ring angular contact ball bearings caused by different axial tightening forces.
[0004] In summary, when measuring the radial clearance of a double-half inner ring angular contact ball bearing, there is a technical problem that the radial clearance measurement result of the double-half inner ring angular contact ball bearing is not accurate enough due to different axial tightening forces. Summary of the invention
[0005] The present invention aims to solve the technical problem that when measuring the radial clearance of a double-half inner ring angular contact ball bearing, the radial clearance measurement result of the double-half inner ring angular contact ball bearing is not accurate enough due to different axial fastening forces, and further provides a fastening device for measuring the radial clearance of the bearing.
[0006] The technical solution of the present invention is a fastening device for measuring radial clearance of a bearing, which comprises a spindle, a fastening plug and a digital torque device. The spindle is installed on an external bearing measuring instrument in a horizontal direction. A positioning surface is provided at the right end of the fastening plug, and a positioning surface is provided at the left end of the spindle. A threaded hole is provided at the center of the spindle. A threaded rod is provided at the middle part of the fastening plug along the center direction of the spindle. The threaded rod of the fastening plug and the threaded hole provided in the center of the spindle are detachably threadedly connected. The fastening plug is rotated in a vertical circumferential direction to adjust the distance between the fastening plug and the spindle. The external bearing to be measured is installed between the positioning surface of the fastening plug and the positioning surface of the spindle. The digital torque device is detachably installed on the left end surface of the fastening plug. The digital torque device is used to rotate the fastening plug and display the torque value.
[0007] As another improvement of the present invention, the size of the positioning surface of the spindle matches the size of the inner ring of the bearing to be tested, and the size of the positioning surface of the fastening insert matches the size of the inner ring of the bearing to be tested.
[0008] As another improvement of the present invention, a positioning groove is radially provided on the outer surface of the spindle, and the spindle is mounted on the external bearing measuring instrument by rotating an external screw against the positioning groove.
[0009] As another improvement of the present invention, a connecting hole is provided in the middle of the left end surface of the fastening plug, and the digital torque device is detachably mounted on the left end surface of the fastening plug through the connecting hole.
[0010] As another improvement of the present invention, the connecting hole is a square hole.
[0011] As another improvement of the present invention, the digital torque device includes a torque wrench and an LCD display screen. The LCD display screen is arranged on the upper surface of the digital torque device, and the digital torque device displays the torque value through the LCD display screen.
[0012] As another improvement of the present invention, the torque wrench is made of vanadium-chromium steel.
[0013] As another improvement of the present invention, a measuring instrument is installed on the upper part of the external bearing measuring instrument, and the measuring instrument is used to measure the radial clearance of the bearing to be measured.
[0014] Beneficial effects of the present invention:
[0015] 1. The fastening insert in the fastening device for measuring radial clearance of bearings of the present invention makes the two half inner rings of the bearing fit together without separation, and at the same time numerically displays the torque required for fastening, thereby achieving the goal of numericalizing the axial fastening force in the process of measuring radial clearance of bearings. Before the use of this device, the axial clamping force of the bearing depends on the experience of the inspection personnel, and the value cannot be read, and it is difficult to achieve uniformity among different personnel. After the use of this device, the fastening torque can be numericalized, and different personnel can select the same value for fastening, which is convenient for unified operation and reduces the difference in measurement results caused by human factors during the measurement process.
[0016] 2. The bearing radial clearance measurement fastening device of the present invention measures and records the bearing radial clearance values measured under different tightening torques, as well as multiple groups of bearing radial clearance values repeatedly measured under a fixed tightening torque, and other data measured under various conditions. Combined with the data analysis function in the detection system, the above data can be analyzed and compared, and the average value, standard deviation, range, median and other values of the measurement results can be calculated, and a normal distribution diagram or control diagram can be drawn to determine the most suitable axial tightening force. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 The invention is a longitudinal cross-sectional schematic diagram of a fastening device for measuring radial clearance of a bearing.
[0018] Figure 2It is a front view schematic diagram of a fastening device for measuring radial clearance of a bearing according to the present invention. DETAILED DESCRIPTION
[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the examples of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention. In the description of the present invention, it should be explained that the positional relationships indicated by the terms "upper", "lower", "left", "right", etc. are only based on the positional relationships of the orientations shown in the drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the referred components have specific orientations, are constructed and operated in specific orientations, and therefore cannot be understood as limitations on the present invention.
[0020] Specific implementation method 1: Combination Figure 1 to Figure 2 The present embodiment is described. The present embodiment is a fastening device for measuring radial clearance of a bearing, which comprises a spindle 1, a fastening plug 2 and a digital torque device 3. The spindle 1 is mounted on an external bearing measuring instrument 4 in a horizontal direction. The fastening plug 2 is arranged axially opposite to the spindle 1. A positioning surface is provided at the right end of the fastening plug 2, and a positioning surface is provided at the left end of the spindle 1. A threaded hole is provided at the center of the spindle 1. A threaded rod 7 is provided at the middle part of the fastening plug 2 along the center direction of the spindle 1. The threaded rod 7 of the fastening plug 2 is detachably threadedly connected to the threaded hole provided at the center of the spindle 1. The fastening plug 2 is rotated in a vertical circumferential direction to adjust the distance between the fastening plug 2 and the spindle 1. The external bearing 5 to be measured is mounted between the positioning surface of the fastening plug 2 and the positioning surface of the spindle 1. The digital torque device 3 is detachably mounted on the left end surface of the fastening plug 2. The digital torque device 3 is used to rotate the fastening plug 2 and display the torque value.
[0021] First, install the mandrel on the bearing measuring instrument, and fix the mandrel and the bearing measuring instrument.
[0022] Install the bearing to be tested on the mandrel. The size of the mandrel is designed according to the inner diameter of the bearing to be tested. The size of the mandrel positioning surface refers to the inner and outer diameters of the bearing to be tested and can be appropriately enlarged.
[0023] Use the fastening insert to initially fasten the inner ring of the bearing. The fastening insert is an integrated piece with a threaded bottom, which cooperates with the threaded hole in the center of the spindle for fixing. The positioning surface size of the middle part of the fastening insert refers to the inner and outer diameter size of the measured bearing. The positioning surface of the fastening insert cooperates with the mounting positioning surface of the spindle to fasten the two half inner rings of the measured bearing, thereby ensuring that the rolling body falls into the bottom of the groove, so that the measured bearing meets the measurement conditions. The upper raised part of the fastening insert has a connection hole that cooperates with the digital torque device.
[0024] The digital torque device is installed with the fastening plug through the upper connection hole of the fastening plug. The fastening plug makes the two half inner rings fit together without separation, and the torque Nm required for fastening is numerically displayed at the same time, so as to achieve the goal of numericalizing the axial fastening force in the process of bearing radial clearance measurement, facilitate unified operation, and reduce the difference in measurement results caused by human factors during the measurement process. Measure and record the bearing radial clearance values measured under different fastening torques, as well as multiple groups of bearing radial clearance values repeatedly measured under a fixed fastening torque. Combined with the data analysis function in the detection system, the above data can be analyzed and compared, and the average value, standard deviation, range, median and other values of the measurement results can be calculated, and a normal distribution diagram or control diagram can be drawn to determine the most suitable axial fastening force.
[0025] Specific implementation method 2: Combination Figure 1 to Figure 2 This embodiment is described. The difference between this embodiment and the first embodiment is that the positioning surface size of the spindle 1 matches the inner ring size of the bearing 5 to be measured, and the positioning surface size of the fastening insert 2 matches the inner ring size of the bearing 5 to be measured. The purpose of this design is to adapt to the size of the bearing to be measured and improve the measurement efficiency. The other components and connection methods are the same as those of the first embodiment.
[0026] Specific implementation method three: Combination Figure 1 to Figure 2 This embodiment is described. The difference between this embodiment and the first embodiment is that a positioning groove is radially provided on the outer surface of the mandrel 1. The mandrel 1 is mounted on the external bearing measuring instrument 4 by rotating the external screw against the positioning groove. The purpose of such design is to facilitate the fixing of the mandrel and the bearing measuring instrument. The other components and connection methods are the same as those of the first or second embodiment.
[0027] Specific implementation method four: Combination Figure 1 to Figure 2 This embodiment is described. The difference between this embodiment and the first embodiment is that a connection hole is provided in the middle of the left end face of the fastening plug 2, and the digital torque device 3 is detachably mounted on the left end face of the fastening plug 2 through the connection hole. The other components and connection methods are the same as any one of the first to third embodiments.
[0028] Specific implementation method five: Combination Figure 1 to Figure 2 This embodiment is described. The difference between this embodiment and the first embodiment is that the connection hole is a square hole. The purpose of this design is to facilitate processing, transmission and measurement of torque. The other components and connection methods are the same as any one of the first to fourth embodiments.
[0029] Specific implementation method six: Combination Figure 1 to Figure 2This embodiment is described. This embodiment is different from the specific embodiment 1 in that the digital torque device 3 includes a torque wrench 31 and an LCD display screen 32. The LCD display screen 32 is provided on the upper surface of the digital torque device 3. The digital torque device 3 displays the torque value through the LCD display screen 32. Other components and connection methods are the same as any one of the specific embodiments 1 to 5.
[0030] Specific implementation method seven: Combination Figure 1 to Figure 2 This embodiment is described. The difference between this embodiment and the first embodiment is that the material of the torque wrench 31 is vanadium-chrome steel. The use of vanadium-chrome steel ensures that the torque wrench is strong and durable. At the same time, the torque wrench has a compact structure, light weight, and is easy to operate. The other components and connection methods are the same as any one of the first to sixth embodiments.
[0031] Specific implementation method eight: Combination Figure 1 to Figure 2 This embodiment is described. The difference between this embodiment and the specific embodiment 1 is that a measuring instrument 6 is installed on the upper part of the external bearing measuring instrument 4. The measuring instrument 6 is used to measure the radial clearance of the bearing 5 to be tested. The function is to measure and record the radial clearance value of the bearing under different tightening torques. The other components and connection methods are the same as any one of the specific embodiments 1 to 7.
[0032] Combination Figure 1 to Figure 2 The working principle of the present invention is described:
[0033] First, install the spindle on the bearing measuring instrument, and fix the spindle and the bearing measuring instrument. Install the bearing to be tested on the spindle, and use the tightening insert to initially tighten the inner ring of the bearing. The tightening insert is an integrated piece, which cooperates with the threaded hole in the center of the spindle to fix and tighten the two half inner rings of the bearing to be tested, so as to ensure that the rolling body falls into the bottom of the groove, so that the bearing to be tested meets the measurement conditions. Use a digital torque device to install and connect the tightening insert through the square hole on the upper part of the tightening insert. The tightening insert makes the two half inner rings fit together without separation, and at the same time numerically displays the torque Nm required for tightening, so as to achieve the goal of numericalizing the axial tightening force during the bearing radial clearance measurement process, facilitate unified operation, and reduce the difference in measurement results caused by human factors during the measurement process. Measure and record the bearing radial clearance values measured under different tightening torques, as well as multiple groups of bearing radial clearance values repeatedly measured under a fixed tightening torque, and other data measured under various conditions. Combined with the data analysis function in the detection system, the above data can be analyzed and compared, the mean value, standard deviation, range, median and other values of the measurement results can be calculated, and a normal distribution diagram or control diagram can be drawn to determine the most suitable axial tightening force.
[0034] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A fastening device for measuring radial clearance of a bearing, characterized in that The invention comprises a spindle (1), a fixing plug (2) and a digital torque device (3). The spindle (1) is mounted on an external bearing measuring instrument (4) in a horizontal direction. A positioning surface is provided at the right end of the fixing plug (2), and a positioning surface is provided at the left end of the spindle (1). A threaded hole is provided at the center of the spindle (1). A threaded rod (7) is provided at the middle of the fixing plug (2) along the center direction of the spindle (1). The threaded rod (7) of the fixing plug (2) is detachably threadedly connected to the threaded hole provided at the center of the spindle (1). The fixing plug (2) is rotated in a vertical circumferential direction to adjust the distance between the fixing plug (2) and the spindle (1). An external bearing to be measured (5) is mounted between the positioning surface of the fixing plug (2) and the positioning surface of the spindle (1). The digital torque device (3) is detachably mounted on the left end surface of the fixing plug (2). The digital torque device (3) is used to rotate the fixing plug (2) and display the torque value.
2. A fastening device for measuring radial clearance of a bearing according to claim 1, characterized in that: The size of the positioning surface of the spindle (1) matches the size of the inner ring of the bearing (5) to be tested, and the size of the positioning surface of the fastening insert (2) matches the size of the inner ring of the bearing (5) to be tested.
3. A fastening device for measuring radial clearance of a bearing according to claim 1, characterized in that: The outer surface of the spindle (1) is provided with a positioning groove in the radial direction, and the spindle (1) is mounted on the external bearing measuring instrument (4) by rotating an external screw against the positioning groove.
4. A fastening device for measuring radial clearance of a bearing according to claim 1, characterized in that: A connection hole is provided in the middle of the left end surface of the fixing plug piece (2), and the digital torque display device (3) is detachably mounted on the left end surface of the fixing plug piece (2) through the connection hole.
5. A fastening device for measuring radial clearance of a bearing according to claim 4, characterized in that: The connecting hole is a square hole.
6. A fastening device for measuring radial clearance of a bearing according to claim 1, characterized in that: The digital torque display device (3) comprises a torque wrench (31) and an LCD display screen (32). The LCD display screen (32) is arranged on the upper surface of the digital torque display device (3). The digital torque display device (3) displays the torque value through the LCD display screen (32).
7. A fastening device for measuring radial clearance of a bearing according to claim 1, characterized in that: The material of the torque wrench (31) is vanadium-chromium steel.
8. A fastening device for measuring radial clearance of a bearing according to any one of claims 1 to 7, characterized in that: A measuring instrument (6) is installed on the upper part of the external bearing measuring instrument (4), and the measuring instrument (6) is used to measure the radial clearance of the bearing (5) to be measured.