A digital indicator with roller bearing

Abstract

The utility model provides a digital display indicator with roller bearings, which includes a digital display module and a measuring module fixedly connected to the digital display module; the measuring module includes a housing, a measuring rod and a force measuring spring located in the housing, and the measuring rod is equipped with a fixed grid; the two ends of the force measuring spring are respectively connected to the housing and the measuring rod, so that the measuring rod can be pulled by the force measuring spring and move along its own axial direction to generate relative displacement between the fixed grid and the moving grid arranged parallel to the surface thereof; a roller bearing is rotatably mounted on a fixed portion provided in the housing to tension the middle part of the force measuring spring, and the angle θ formed by the straight line where the part of the force measuring spring located between the housing and the roller bearing and the straight line where the part of the force measuring spring located between the measuring rod and the roller bearing is located has a value range of 0°<θ<90°. The digital display indicator with roller bearings provided by the utility model can effectively increase the measuring range without changing its own appearance size, and extend its overall service life.

Description

Technical Field

[0001] The utility model belongs to the technical field of measuring instruments, in particular to a digital display indicator with a roller bearing. Background Art

[0002] The digital display indicator is a mechanical measuring instrument. The current digital display indicator includes a shell, a circuit board, an LCD display, a measuring board, an original device seat, an original device, a fixed grid plate, a fixed grid seat, a moving grid plate, a moving grid seat, a cover, a measuring rod, a force measuring spring, a measuring head, etc. The circuit board and the original device seat are installed on the shell, and the moving grid seat is connected with a flat cable (the moving grid is installed on the moving grid seat); at this time, the fixed grid is installed on the fixed grid seat and then assembled on the measuring rod, and the measuring rod is installed in the shell so that the fixed grid and the moving grid surface are parallel and fit; the measuring rod is pulled by the force measuring spring to cause the moving grid and the fixed grid to displace, and a voltage signal is generated by the displacement, and a digital signal is generated after MCU data processing to generate a digital display on the display chip.

[0003] Generally, if the measuring range of digital indicators of the same series is increased, the stroke of the force measuring spring needs to be increased. This will involve changes in the appearance size of the digital indicator. In order to minimize the changes in the appearance size of the digital indicator caused by the change in the stroke of the force measuring spring, the stroke of the force measuring spring is not linear, but has a corner. Since the corner is fixed and the supporting area of ​​the force measuring spring is small, the force measuring spring will be deformed and lose its elasticity after being stretched many times, which is not conducive to maintaining the overall service life of the digital indicator. Utility Model Content

[0004] In view of the above-mentioned problems existing in the prior art, the main purpose of the utility model is to provide a digital display indicator with roller bearings. The provided digital display indicator with roller bearings can effectively increase the measurement range and extend its overall service life without changing its own appearance size.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] The utility model provides a digital display indicator for a roller bearing, the digital display indicator for the roller bearing comprising a digital display module and a measuring module fixedly connected under the digital display module;

[0007] The measuring module comprises a housing, a measuring rod and a force measuring spring located in the housing, wherein the measuring rod is equipped with a fixed grid; the two ends of the force measuring spring are respectively connected to the housing and the measuring rod, so that the measuring rod can be pulled by the force measuring spring to move along its own axis direction, so that a relative displacement is generated between the fixed grid and the moving grid arranged parallel to the surface thereof;

[0008] Wherein, a fixed part is provided in the shell, and a roller bearing is rotatably mounted on the fixed part to tension the middle part of the force measuring spring. The value range of the angle θ formed by the straight line where the part of the force measuring spring located between the shell and the roller bearing is located and the straight line where the part of the force measuring spring located between the measuring rod and the roller bearing is located is 0°<θ<90°.

[0009] As a further description of the above technical solution, the roller bearing is further provided with a limiting groove along its circumference, and the middle portion of the force measuring spring is tensioned on a side of the limiting groove away from the fixing portion.

[0010] As a further description of the above technical solution, the limiting groove includes a groove bottom wall and two groove side walls respectively connected to the groove bottom wall and arranged opposite to each other;

[0011] The bottom wall of the groove abuts against the force measuring spring, and the force measuring spring is gap-fitted between the two side walls of the groove.

[0012] As a further description of the above technical solution, two ends of the force measuring spring are connected to the housing and the measuring rod respectively through screws.

[0013] As a further description of the above technical solution, a positioning sleeve is further provided on the outer side of the housing along the axial direction of the measuring rod;

[0014] The measuring rod can pass through the housing along its own axial direction and slide in the positioning sleeve.

[0015] As a further description of the above technical solution, one end of the measuring rod passing through the positioning sleeve is further provided with a measuring head, and the other end of the measuring rod passing through the shell is provided with a lifting cap.

[0016] As a further description of the above technical solution, it also includes a back cover, which is fastened to a side of the shell away from the digital display module to close the shell.

[0017] By means of the above technical solution, the outstanding effects of the utility model are:

[0018] 1. The digital indicator with roller bearing provided by the utility model has a fixed part arranged in the housing, and a roller bearing is rotatably installed on the fixed part to continuously tension the middle part of the force measuring spring. Therefore, during the stretching process, the force measuring spring is divided into two parts, one between the housing and the roller bearing and the other between the measuring rod and the roller bearing. The value range of the angle θ formed by the straight lines where the two parts are located is 0°<θ<90°, so that the measuring rod can be driven to move along its own axial direction, so as to drive the fixed grid assembled thereon to generate relative displacement with respect to the moving grid arranged parallel to the surface of the fixed grid, thereby generating a voltage signal. After the MCU data is processed, the digital signal is generated and a digital display is generated on the display chip of the digital display module, thereby effectively increasing its measuring range without changing the external dimensions of the digital indicator itself. Compared with conventional digital indicator gauges that do not use roller bearings, the roller bearings are rotatably mounted on the fixed portion to tension the force measuring spring, and the area supporting the force measuring spring is larger. Therefore, during the expansion and contraction process of the force measuring spring, compared with its original expansion and contraction trajectory, the angle θ formed by the straight line where the portion of the force measuring spring located between the housing and the roller bearing and the straight line where the portion of the force measuring spring located between the measuring rod and the roller bearing is also larger. Therefore, although the force measuring spring is tensioned, the stress is dispersed, which effectively reduces the deformation of the force measuring spring, increases its effective service life, and thus ensures the overall service life of the digital indicator gauge.

[0019] 2. Since a roller bearing is arranged on the fixed part in the housing, it plays a tensioning role on the middle part of the force measuring spring, so that the angle θ formed by the straight lines between the force measuring spring located between the housing and the roller bearing and between the measuring rod and the roller bearing is larger, so that the overall transition of the force measuring spring during the expansion and contraction process is smoother, and thus the change of a complete measurement stroke of the digital indicator is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a rear view of the digital indicator with roller bearing (excluding the rear cover) in the embodiment of the utility model;

[0021] Figure 2 It is an axial schematic diagram of a roller bearing in an embodiment of the utility model.

[0022] Description of Figure Numbers:

[0023] 1. Digital display module; 21. Housing; 22. Measuring rod; 23. Force measuring spring; 3. Fixing part; 4. Roller bearing; 5. Limiting groove; 51. Groove bottom wall; 52. Groove side wall; 6. Screw; 7. Positioning sleeve; 81. Measuring head; 82. Lifting cap; 9. Original telescopic track. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the description of the present utility model, it should be noted that the terms "upper", "middle", "lower", "inside", "outside", "front", "back", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The following describes the implementation method of the present utility model based on its overall structure.

[0026] See also Figure 1 to Figure 2 The utility model discloses a digital display indicator with a roller bearing 4, the digital display indicator with a roller bearing 4 comprises a digital display module 1 and a measuring module fixedly connected under the digital display module 1;

[0027] The measuring module comprises a housing 21, a measuring rod 22 and a force measuring spring 23 located in the housing 21, wherein the measuring rod 22 is equipped with a fixed grid; the two ends of the force measuring spring 23 are respectively connected to the housing 21 and the measuring rod 22, so that the measuring rod 22 can be pulled by the force measuring spring 23 to move along its own axis direction, so that a relative displacement is generated between the fixed grid and the moving grid arranged parallel to the surface thereof;

[0028] Among them, a fixing part 3 is provided in the shell 21, and a roller bearing 4 is rotatably mounted on the fixing part 3 to tension the middle part of the force measuring spring 23. The value range of the angle θ formed by the straight line where the part of the force measuring spring 23 located between the shell 21 and the roller bearing 4 is located and the straight line where the part of the force measuring spring 23 located between the measuring rod 22 and the roller bearing 4 is located is 0°<θ<90°.

[0029] In the above-mentioned setting, since a fixing portion 3 is provided in the housing 21 of the digital display indicator, and a roller bearing 4 is rotatably installed on the fixing portion 3 to continuously tension the middle part of the force measuring spring 23, the force measuring spring 23 is divided into two parts located between the housing 21 and the roller bearing 4 and between the measuring rod 22 and the roller bearing 4 during the stretching process, and the value range of the angle θ formed by the straight lines where the two parts are located is 0°<θ<90°, so that the measuring rod 22 can be driven to move along its own axial direction, so as to drive the fixed grid assembled thereon to generate relative displacement with respect to the moving grid arranged parallel to the surface of the fixed grid, thereby generating a voltage signal, and the digital signal generated by MCU data processing generates a digital display on the display chip of the digital display module 1 (the components involved in the digital display module 1 and the connection relationship of the components are all conventional designs, which are not repeated here), thereby effectively increasing its measurement range without changing the external dimensions of the digital display indicator itself. Among them, compared with the conventional digital display indicator that does not use the roller bearing 4, the roller bearing 4 is rotatably installed on the fixed part 3 to tension the force measuring spring 23, and the area supporting the force measuring spring 23 is larger. Therefore, during the extension and retraction process of the force measuring spring 23, compared with its original extension and retraction trajectory 9, the angle θ formed by the straight line where the part of the force measuring spring 23 located between the shell 21 and the roller bearing 4 and the straight line where the part of the force measuring spring 23 located between the measuring rod 22 and the roller bearing 4 is located is also larger. Therefore, although the force measuring spring 23 is tensioned, the stress is dispersed, which effectively reduces the deformation of the force measuring spring 23 and increases its effective service life, thereby ensuring the overall service life of the digital display indicator; the angle θ formed by the straight line where the part of the force measuring spring 23 located between the shell 21 and the roller bearing 4 and the straight line where the part of the force measuring spring 23 located between the measuring rod 22 and the roller bearing 4 is larger, which also makes the overall transition of the force measuring spring 23 smoother during the extension and retraction process, and thus the change of a complete measurement stroke of the digital display indicator is more stable.

[0030] See also Figure 2 Specifically, in this embodiment, the roller bearing 4 is further provided with a limiting groove 5 along its circumference. Figure 1 As shown, the roller bearing 4 is rotatably mounted on the fixed part 3, and in the vertical direction, the bottom end of the fixed part 3 is connected to the middle part of the roller bearing 4, so the bottom end of the fixed part 3 is located between the limit grooves 5 in the vertical direction, and the left end of the force measuring spring 23 is connected to the measuring rod 22, and the right end thereof is connected to the preset position inside the shell 21 on the right side, and the middle part is tensioned by the side of the limit groove 5 located below the bottom end of the fixed part 3.

[0031] Please continue reading Figure 2Specifically, in the present embodiment, the limiting groove 5 comprises a groove bottom wall 51 and two groove side walls 52 respectively connected to the groove bottom wall 51 and arranged opposite to each other, the groove bottom wall 51 abuts against the force measuring spring 23, and the force measuring spring 23 is clearance-fitted between the two groove side walls 52, which is equivalent to the force measuring spring 23 being always limited in the limiting groove 5 during the extension and retraction process and will not fall off the roller bearing 4, and also effectively avoiding the bending of the force measuring spring 23 and the friction between the roller bearing 4.

[0032] See also Figure 1 Specifically, in this embodiment, the left and right ends of the force measuring spring 23 are respectively fastened to the measuring rod 22 and the housing 21 by screws 6. More specifically, since the diameter of the measuring rod 22 is relatively small, in order to ensure the continuous connection between the force measuring spring 23 and the measuring rod 22, a transfer block can be used to assist the fastening and connection function of the screw 6, that is, the transfer block is fixed on the measuring rod 22, and then the screw 6 is used to fasten the left end of the force measuring spring 23 to the transfer block.

[0033] Specifically, in this embodiment, a positioning sleeve 7 is further provided at the lower outer side of the housing 21, and when the force measuring spring 23 is extended or retracted, the measuring rod 22 can be driven to pass through the housing 21 in the vertical direction and slide in the positioning sleeve 7. The positioning sleeve 7 is provided so that the displacement of the measuring rod 22 moving up and down is within a controllable range.

[0034] Specifically, in this embodiment, a measuring head 81 is provided at the lower end of the measuring rod 22 passing through the positioning sleeve 7 , and a lifting cap 82 is provided at the upper end of the measuring rod 22 passing through the housing 21 .

[0035] Specifically, in this embodiment, a rear cover (not shown) is fastened to the side of the housing 21 away from the digital display module 1, and the rear cover is fastened to the housing 21 to close the housing 21. The housing 21 can be made of aluminum material, which is light and more convenient for the use of the digital display indicator.

[0036] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not limited to the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any changes, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A digital indicator with roller bearing, characterized in that: It includes a digital display module and a measuring module fixedly connected under the digital display module; The measuring module comprises a housing, a measuring rod and a force measuring spring located in the housing, wherein the measuring rod is equipped with a fixed grid; the two ends of the force measuring spring are respectively connected to the housing and the measuring rod, so that the measuring rod can be pulled by the force measuring spring to move along its own axis direction, so that a relative displacement is generated between the fixed grid and the moving grid arranged parallel to the surface thereof; Wherein, a fixed part is provided in the shell, and a roller bearing is rotatably mounted on the fixed part to tension the middle part of the force measuring spring. The value range of the angle θ formed by the straight line where the part of the force measuring spring located between the shell and the roller bearing is located and the straight line where the part of the force measuring spring located between the measuring rod and the roller bearing is located is 0°<θ<90°.

2. The digital indicator of the roller bearing according to claim 1, characterized in that: The roller bearing is also provided with a limiting groove along its circumference, and the middle part of the force measuring spring is tensioned on a side of the limiting groove away from the fixing part.

3. The digital indicator of the roller bearing according to claim 2, characterized in that: The limiting groove comprises a groove bottom wall and two groove side walls respectively connected to the groove bottom wall and arranged opposite to each other; The bottom wall of the groove abuts against the force measuring spring, and the force measuring spring is gap-fitted between the two side walls of the groove.

4. The digital indicator of the roller bearing according to claim 1, characterized in that: The two ends of the force measuring spring are respectively connected to the housing and the measuring rod through screws.

5. The digital indicator of the roller bearing according to claim 1, characterized in that: A positioning sleeve is also provided on the outer side of the housing along the axis direction of the measuring rod; The measuring rod can pass through the housing along its own axial direction and slide in the positioning sleeve.

6. The digital indicator for roller bearing according to claim 5, characterized in that: One end of the measuring rod passing through the positioning sleeve is also provided with a measuring head, and the other end of the measuring rod passing through the shell is provided with a lifting cap.

7. The digital indicator of the roller bearing according to claim 1, characterized in that: It also includes a back cover, which is fastened to a side of the shell facing away from the digital display module to close the shell.

Images