A ball head test pen for detecting the appearance quality of the spherical rolling element of a bearing

Abstract

A ball head test pen for detecting the appearance quality of a spherical rolling element of a bearing relates to a device for detecting the appearance quality of a spherical rolling element. The invention aims to solve the problem that the existing ball head test pen for detecting the appearance quality of a spherical rolling element is greatly affected by the operator's technical level and subjective judgment, resulting in inaccurate detection results. The outer shell of the invention is a columnar structure with one end open and the other end closed; the ball head is clamped at the open end of the outer shell for contacting the ball to be detected, and the ball head and the outer shell form a hollow cavity; the elastic connecting rod and the pressure sensor are both arranged in the hollow cavity; wherein the pressure sensor is fixed at the rear end of the hollow cavity of the outer shell, one end of the elastic connecting rod is fixed on the ball head, and the other end of the elastic connecting rod is fixed on the pressure sensing part of the pressure sensor. The beneficial effect is that the accuracy of detection is improved.

Description

Technical Field

[0001] The invention relates to a device for improving the appearance quality of a spherical rolling body. Background Art

[0002] The ball test pen can detect the appearance quality of the bearing. It is easy to operate and can help determine whether there are defects on the bearing surface. It can simply determine the degree of surface damage of the bearing and ensure the quality of the bearing. The detection method is to hold the ball test pen, contact the ball head of the ball test pen with the surface to be tested, and slide the ball head of the ball test pen on the surface to be tested. At the same time, manually apply pressure and use the touch of the hand to help determine the quality of the surface to be tested.

[0003] However, for the appearance quality inspection of the spherical rolling element of the bearing, it is not easy to fix the spherical rolling element and the contact with the ball head test pen is point contact, so it is not easy to accurately control the relative position during the test. In addition, the use of the existing ball head test pen to inspect the appearance quality of the spherical rolling element is greatly affected by the operator's technical level and subjective judgment. The inspection is time-consuming and laborious, and may even cause errors in the inspection results, resulting in inaccurate inspection results. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that the existing ball head test pen for detecting the appearance quality of spherical rolling elements is greatly affected by the operator's technical level and subjective judgment, resulting in inaccurate detection results. A ball head test pen for detecting the appearance quality of spherical rolling elements of bearings is proposed.

[0005] The ball head test pen for detecting the appearance quality of the spherical rolling element of a bearing according to the present invention comprises a ball head, an elastic connecting rod, a pressure sensor and a housing;

[0006] The shell is a columnar structure with one end open and the other end closed;

[0007] The ball head is clamped at the open end of the housing and is used to contact the ball to be tested, and the ball head and the housing form a hollow cavity;

[0008] The elastic connecting rod and the pressure sensor are both arranged in the hollow cavity; wherein the pressure sensor is fixed at the rear end of the hollow cavity of the shell, one end of the elastic connecting rod is fixed on the ball head, and the other end of the elastic connecting rod is fixed at the pressure sensing part of the pressure sensor.

[0009] Further, it also includes a controller and a display;

[0010] The pressure signal output end of the pressure sensor is connected to the pressure signal input end of the controller;

[0011] The display signal output terminal of the controller is connected to the display signal input terminal of the display.

[0012] Further, the display is arranged on a side wall of the housing or on a rear end surface of the housing;

[0013] The controller is fixed inside the shell.

[0014] Further, a spring is also included;

[0015] The spring is nested on the elastic connecting rod, and one end of the spring contacts the ball head, and the other end of the spring contacts the pressure sensing portion of the pressure sensor.

[0016] Furthermore, the shell is a cylindrical structure, and the front end of the shell is a conical structure.

[0017] Furthermore, the ball head is a spherical structure.

[0018] The working principle of the ball-tip test pen for detecting the appearance quality of the spherical rolling element of a bearing described in the present invention is as follows:

[0019] When the ball head test pen is not working, the ball head will be stuck at the front end of the shell; when the ball head test pen is detecting the surface quality of the ball to be detected, the ball head contacts the ball to be detected through the ball head, and the ball head will retract into the hollow cavity of the shell under the pressure of the ball to be detected, and transmit the pressure to the pressure sensor through the elastic connecting rod; the pressure sensor outputs a pressure signal; the ball head test pen is rotated or the ball to be detected is rotated; the pressure sensor outputs a continuous pressure signal; based on the continuous pressure signal, it is judged whether the surface quality of the ball to be detected is intact. When the surface of the ball to be detected is intact, the continuous pressure signal output by the pressure sensor is flat. When the continuous pressure signal output by the pressure sensor fluctuates, it indicates that there are defects on the surface of the ball to be detected; and the direction and size of the defects on the surface of the ball to be detected can be qualitatively and quantitatively judged by the fluctuation size and fluctuation direction of the continuous pressure signal.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The ball head of the ball head test pen described in the present invention is in point contact with the ball to be tested, and the front end of the shell can fit various specifications of the ball to be tested; surface quality detection can be performed more conveniently and stably, thereby improving detection efficiency and detection stability; at the same time, a pressure sensor is provided in the hollow cavity of the ball head test pen, and the surface quality of the ball to be tested is judged by the pressure sensing signal output by the pressure sensor. Therefore, the ball head test pen changes from analysis based on operator experience to qualitative and quantitative analysis of electronic signals; the shortcomings of insufficient technical level of operators and inaccurate subjective judgment can be avoided, thereby improving the accuracy of detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1This is a schematic diagram of the structure of a ball-tip test pen for detecting the appearance quality of a spherical rolling element of a bearing according to a specific implementation mode 1;

[0023] Figure 2 It is a structural schematic diagram of a ball head test pen used for detecting the appearance quality of a spherical rolling element of a bearing as described in the first specific implementation mode;

[0024] Figure 3 This is a schematic diagram of the pressure signal output when the surface quality of the ball to be tested is intact in the first specific implementation mode; wherein the abscissa is time, the unit is S; the ordinate is the pressure signal, the unit is N;

[0025] Figure 4 It is a schematic diagram of the pressure signal output when the surface quality of the ball to be tested in the first specific implementation method is concave and convex, wherein the horizontal axis is time, the unit is S; the vertical axis is the pressure signal, the unit is N. DETAILED DESCRIPTION

[0026] Specific implementation method 1. Combination Figures 1 to 4 The present embodiment is described. The present embodiment is a ball tip test pen for detecting the appearance quality of a spherical rolling element of a bearing, characterized in that it comprises a ball tip 1, an elastic connecting rod 2, a pressure sensor 3 and a housing 4;

[0027] The housing 4 is a columnar structure with one end open and the other end closed;

[0028] The ball head 1 is clamped at the open end of the housing 4 to contact the ball 6 to be tested, and the ball head 1 and the housing 4 form a hollow cavity;

[0029] The elastic connecting rod 2 and the pressure sensor 3 are both arranged in the hollow cavity; wherein the pressure sensor 3 is fixed at the rear end of the hollow cavity of the shell 4, one end of the elastic connecting rod 2 is fixed on the ball head 1, and the other end of the elastic connecting rod 2 is fixed at the pressure sensing point of the pressure sensor 3.

[0030] In this embodiment, the elastic connecting rod 2 is a retractable structure, and the elastic connecting rod 2 is made of an elastic material; for example, rubber; when the ball head test pen is not working, the ball head 1 will be stuck at the front end of the housing 4; Figure 1 As shown; when the ball head test pen is testing the surface quality of the ball to be tested, the ball head 1 contacts the ball to be tested 6, and the ball head 1 will retract into the hollow cavity of the housing 4 under the pressure of the ball to be tested 6, as shown Figure 2As shown, the pressure is transmitted to the pressure sensor 3 through the elastic connection 2; the pressure sensor 3 outputs a pressure signal; the ball head test pen is rotated or the ball 6 to be tested is rotated; the pressure sensor 3 outputs a continuous pressure signal; according to the continuous pressure signal, it is judged whether the surface quality of the ball 6 to be tested is intact. When the surface of the ball 6 to be tested is intact, the continuous pressure signal output by the pressure sensor 3 is straight, as shown in FIG. Figure 3 As shown, the first 1 second is the stage where the ball head 1 and the ball 6 to be detected just come into contact; when the continuous pressure signal output by the pressure sensor 3 fluctuates, such as Figure 4 As shown, it indicates that there are defects on the surface of the ball 6 to be detected; when the pressure signal fluctuates upward (i.e. the pressure signal becomes larger), it indicates that there is a protrusion on the ball 6 to be detected; conversely, when the pressure signal fluctuates downward (i.e. the pressure signal becomes smaller), it indicates that there is a depression on the ball 6 to be detected; the direction and size of the defect on the surface of the ball 6 to be detected can be qualitatively and quantitatively determined by the fluctuation size and fluctuation direction of the continuous pressure signal.

[0031] Specific implementation method 2: This implementation method further defines the ball tip test pen for detecting the appearance quality of the spherical rolling element of a bearing described in specific implementation method 1. In this implementation method, it also includes a controller and a display;

[0032] The pressure signal output end of the pressure sensor 3 is connected to the pressure signal input end of the controller;

[0033] The display signal output terminal of the controller is connected to the display signal input terminal of the display.

[0034] In this embodiment, a controller and a display are provided to visualize the pressure signal output by the pressure sensor 3, and then it is directly determined whether the ball 6 to be inspected has defects based on the pressure signal displayed on the display.

[0035] Specific implementation method 3: This implementation method further defines the ball head test pen for detecting the appearance quality of the spherical rolling element of the bearing described in specific implementation method 2. In this implementation method, the display is arranged on the side wall of the housing 4 or on the rear end surface of the housing 4;

[0036] The controller is fixed inside the housing 4 .

[0037] In this embodiment, the controller is arranged inside the housing 4 for easy carrying and connecting wires; the display is arranged on the side wall of the housing 4 or on the rear end face of the housing 4 for easy observation.

[0038] Specific implementation method 4: This implementation method further defines the ball head test pen for detecting the appearance quality of the spherical rolling element of a bearing described in specific implementation method 1. In this implementation method, it further includes a spring 5;

[0039] The spring 5 is nested on the elastic connecting rod 2 , and one end of the spring 5 is in contact with the ball head 1 , and the other end of the spring 5 is in contact with the pressure sensing portion of the pressure sensor 3 .

[0040] In this embodiment, the spring 5 is added to increase the elasticity of the elastic connecting rod 2 to ensure that the ball head 1 is in close contact with the ball 6 to be tested during the test, thereby improving the accuracy of the test.

[0041] Specific implementation method five: This implementation method further limits the ball tip test pen for detecting the appearance quality of the spherical rolling element of a bearing described in specific implementation method one. In this implementation method, the shell 4 is a cylindrical structure, and the front end of the shell 4 is a conical structure.

[0042] In this embodiment, the housing 4 is a cylindrical structure, which is convenient for operators to use and carry, and the front end of the housing 4 is a conical structure, which is more convenient to use.

[0043] Specific implementation method 6: This implementation method further limits the ball head test pen for detecting the appearance quality of the spherical rolling element of a bearing described in specific implementation method 1. In this implementation method, the ball head 1 is a spherical structure.

[0044] In this embodiment, the ball head 1 is a spherical structure so that the ball head 1 is just stuck at the front end of the shell 4 before testing; and the spherical structure of the ball head 1 is in point-to-point contact with the ball 6 to be tested. When there are scratches or other defects at the contact point on the surface of the ball 6 to be tested, the position of the ball head 1 changes up and down more obviously, and the test accuracy is higher.

[0045] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A ball-tip test pen for detecting the appearance quality of a spherical rolling element of a bearing, characterized in that: It comprises a ball head (1), an elastic connecting rod (2), a pressure sensor (3) and a housing (4); The housing (4) is a columnar structure with one end open and the other end closed; The ball head (1) is clamped at the open end of the housing (4) and is used to contact the ball (6) to be detected, and the ball head (1) and the housing (4) form a hollow cavity; The elastic connecting rod (2) and the pressure sensor (3) are both arranged in the hollow cavity; wherein the pressure sensor (3) is fixed to the rear end of the hollow cavity of the housing (4), one end of the elastic connecting rod (2) is fixed to the ball head (1), and the other end of the elastic connecting rod (2) is fixed to the pressure sensing location of the pressure sensor (3).

2. A ball tip test pen for detecting the appearance quality of a spherical rolling element of a bearing according to claim 1, characterized in that: Also includes controller and display; The pressure signal output end of the pressure sensor (3) is connected to the pressure signal input end of the controller; The display signal output terminal of the controller is connected to the display signal input terminal of the display.

3. A ball tip test pen for detecting the appearance quality of a spherical rolling element of a bearing according to claim 2, characterized in that: The display is arranged on a side wall of the housing (4) or on a rear end surface of the housing (4); The controller is fixed inside the housing (4).

4. A ball tip test pen for detecting the appearance quality of a spherical rolling element of a bearing according to claim 1, characterized in that: Also includes a spring (5); The spring (5) is nested on the elastic connecting rod (2), and one end of the spring (5) is in contact with the ball head (1), and the other end of the spring (5) is in contact with the pressure sensing portion of the pressure sensor (3).

5. A ball tip test pen for detecting the appearance quality of a spherical rolling element of a bearing according to claim 1, characterized in that: The shell (4) is a cylindrical structure, and the front end of the shell (4) is a conical structure.

6. A ball tip test pen for detecting the appearance quality of a spherical rolling element of a bearing according to claim 1, characterized in that: The ball head (1) is a spherical structure.

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