High-precision digital display depth gauge

Abstract

The utility model provides a high-precision digital display depth gauge, which comprises a base, a shell, a gauge body, a movable gate, a fixed gate, a measuring rod and a display module, and is characterized in that the gauge body is longitudinally and fixedly connected to the top of the base, and the fixed gate is arranged on the gauge body; the upper end of the measuring rod is fixedly connected to the shell, and the lower end passes through a longitudinal measuring rod through hole formed in the base; the front end of the shell is provided with a movable grid mounting groove, at least two positioning columns arranged in the front-back direction are mounted in the movable grid mounting groove, and the movable grid is slidably connected to the positioning columns through mounting holes and connected and positioned with the movable grid mounting groove through structural adhesive. According to the high-precision digital display depth gauge provided by the utility model, the gap between the movable gate and the fixed gate can be adjusted, and the measurement precision of the digital display depth gauge can be effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of digital depth gauge technology, specifically to a high-precision digital depth gauge. Background Technology

[0002] Digital depth gauges are important measuring tools in the machinery industry. Existing digital depth gauges typically include a gauge body, a gauge frame, a moving grid module, a fixed grid module, and a display module. The moving grid sensor and display module are mounted on the gauge frame, while the fixed grid is mounted on the gauge body. The gauge frame and the gauge body move relative to each other during measurement. The depth measurement is achieved by measuring the linear displacement of the gauge frame and the gauge body.

[0003] With the development of technology and the progress of industry, the precision requirements for measuring tools in mechanical manufacturing are becoming increasingly higher, and the requirements for digital depth gauges are becoming more stringent. The signals from the moving and fixed grating sensors are microelectronic signals, requiring very high precision in the gap and parallelism between them. Excessive gap between the moving and fixed gratings can cause jumps in the measurement readings, while insufficient gap can cause the measuring rod to jam. Insufficient gap will result in significant measurement errors. Poor parallelism between the moving and fixed gratings will cause changes in their spacing during measurement, leading to reading errors on the digital display and affecting measurement accuracy. Current digital depth gauges primarily rely on improving machining precision to ensure the gap and parallelism of the moving and fixed gratings, which places extremely high demands on machining. Furthermore, the gap between the moving and fixed gratings cannot be adjusted according to requirements, making it difficult to meet the precision requirements of modern industry for measuring tools.

[0004] Based on the above problems, a high-precision digital depth gauge needs to be proposed to ensure the gap and parallelism between the moving and fixed gauges, improve the measurement accuracy of the gauge, and meet the precision requirements of modern mechanical manufacturing. Utility Model Content

[0005] This invention proposes a high-precision digital depth gauge, in which the gap between the moving and fixed grids can be adjusted, and the parallelism between the moving and fixed grids can be effectively guaranteed, which is beneficial to improving the measurement accuracy of the digital depth gauge.

[0006] To achieve the above-mentioned technical objectives and effects, this utility model solves the above-mentioned problems through the following technical solution:

[0007] A high-precision digital depth gauge includes a base, a housing, a gauge body, a moving grid, a fixed grid, a measuring rod, and a display module. The gauge body is longitudinally fixed to the top of the base, and the fixed grid is installed on the gauge body. The housing has a square gauge hole that slides longitudinally with the gauge body. The upper end of the measuring rod is fixed to the housing, and the lower end passes through a longitudinal measuring rod through hole in the base. The front end of the housing has a moving grid mounting groove, in which at least two positioning posts arranged in the front-rear direction are installed. The moving grid has mounting holes that match the number and position of the positioning posts. The moving grid is slidably connected to the positioning posts and is connected and positioned to the moving grid mounting groove by structural adhesive.

[0008] Furthermore, an arc-shaped spring is installed on the inner wall of the left or right side of the square ruler hole, and two threaded through holes are opened on the opposite side; the two ends of the arc-shaped spring are fixed to the side wall of the square ruler hole, and the arc-shaped section abuts against the ruler body; a ball is inserted into the threaded through hole, and a guide screw is screwed into the threaded through hole from the outer end so that the ball abuts against the ruler body; the abutting height of the arc-shaped spring is located between the two threaded through holes.

[0009] Furthermore, the positioning posts are four distributed along the four corners of a rectangle, and the moving grid mounting slot has post holes for the positioning posts to be inserted and positioned.

[0010] Furthermore, the housing has a measuring rod positioning hole for inserting and positioning the top of the measuring rod, and the measuring rod is interference-fitted with the measuring rod positioning hole; the measuring rod positioning hole is a circular hole that communicates with the square ruler hole.

[0011] Furthermore, the top of the base has an oblong hole that fits into the bottom of the ruler body, and the bottom of the ruler body is interference-fitted with the oblong hole; the through hole of the measuring rod is a circular hole that communicates with the oblong hole.

[0012] Furthermore, the ruler body has a grid groove for installing the grid and the scale film, and the grid and the scale film are sequentially bonded and positioned in the grid groove.

[0013] The advantages and effects of this utility model are:

[0014] This invention discloses a high-precision digital depth gauge. A fixed grid is mounted on the gauge body and slides longitudinally relative to the housing. A movable grid slides back and forth relative to the housing via a positioning post, thus adjusting the relative distance between the movable and fixed grids and allowing for gap adjustment. Simultaneously, the positioning post is installed along the front-back direction of the housing, ensuring the parallelism between the movable grid sliding along the post and the housing, thereby guaranteeing the parallelism between the movable and fixed grids and improving the instrument's measurement accuracy.

[0015] This design incorporates opposing bow-shaped springs and ball bearings within the square scale hole of the housing. The ball bearings, guided by guide screws, abut against the scale body. The guide screws allow adjustment of the clearance between the scale body and the housing, reducing frictional resistance. Furthermore, the bow-shaped springs and ball bearings on both sides of the scale body limit movement, reducing scale body wobble and thus improving the parallelism between the moving and fixed scales, thereby lowering measurement errors. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 for Figure 1 Exploded view of the structure shown;

[0018] Figure 3This is a schematic diagram of the internal assembly structure of the shell.

[0019] Part Number Identification: 1. Base, 1-1. Measuring rod through hole, 1-2. Waist-shaped hole, 2. Housing, 2-1. Square ruler hole, 2-2. Moving grid mounting slot, 2-3. Positioning post, 2-4. Threaded through hole, 2-5. Measuring rod positioning hole, 2-6. Post hole, 3. Ruler body, 4. Moving grid, 4-1. Mounting hole, 5. Fixed grid, 6. Measuring rod, 7. Display module, 8. Bow-shaped spring, 9. Ball bearing, 10. Guide screw, 11. Scale film. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. The specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] This embodiment describes a high-precision digital depth gauge, as shown in the attached figure. Figure 1 , 2 As shown in Figure 3, the device includes a base 1, a housing 2, a ruler 3, a moving grid 4, a fixed grid 5, a measuring rod 6, a display module 7, and a graduated film 11. The ruler 3 is longitudinally inserted into the oblong hole 1-2 at the top of the base 1, and the bottom end of the ruler 3 is fixed with the oblong hole 1-2 by an interference fit. The ruler 3 has a fixed grid groove for installing the fixed grid 5 and the graduated film 11. The fixed grid 5 and the graduated film 11 are sequentially bonded and positioned in the fixed grid groove without affecting the relative sliding between the ruler 3 and the housing 2.

[0022] The housing 2 has a square ruler hole 2-1 that slides longitudinally with the ruler body 3. The housing 2 drives the fixed grid 5 and the scale film 11 to slide longitudinally relative to the ruler body 3. The housing 2 has a longitudinal measuring rod positioning hole 2-5. The measuring rod 6 is fixed by an interference fit with the measuring rod positioning hole 2-5. The measuring rod positioning hole 2-5 is a circular hole that communicates with the square ruler hole 2-1. The base 1 has a longitudinal measuring rod through hole 1-1. The lower end of the measuring rod 6 slides through the measuring rod through hole 1-1. The measuring rod through hole 1-1 is a circular hole that communicates with the oblong hole 1-2.

[0023] A movable grid mounting groove 2-2 is provided at the front end of the housing 2. Four positioning posts 2-3, arranged in the front-rear direction, are installed along the four corners of the rectangular groove 2-2. The groove 2-2 also has post holes 2-6 for the positioning posts 2-3 to be inserted and positioned. The movable grid 4 has four mounting holes 4-1 matching the number and position of the positioning posts 2-3. The movable grid 4 slides back and forth relative to the housing 2 via the positioning posts 2-3, thereby adjusting the gap between the movable grid 4 and the fixed grid 5. During adjustment, the movable grid 4 is adjusted to a suitable position, and then connected and fixed to the housing 2 using structural adhesive, thus completing the positioning and installation of the movable grid. The display module 7 is mounted on the front side of the housing 2, sealing the front end of the housing 2.

[0024] As attached Figure 2 , 3 As shown, an arc-shaped spring piece 8 is installed on the inner left side of the square ruler hole 2-1. The two ends of the arc-shaped spring piece 8 are welded to the side wall of the square ruler hole 2-1, and the middle arc-shaped section abuts against the ruler body 3. Two threaded through holes 2-4 are opened on the side of the square ruler hole 2-1 opposite to the installation position of the arc-shaped spring piece 8. Ball bearings 9 are inserted into the threaded through holes 2-4. A guide screw 10 is screwed into the threaded through holes 2-4 from the outer end of the housing 2, causing the ball bearings 9 to abut against the ruler body 3. The ruler body 3 is limited by the arc-shaped spring pieces 8 and ball bearings 9 on both sides, reducing the wobbling of the ruler body 3 and improving the parallelism between the moving grid 4 and the fixed grid 5. Adjusting the guide screw 10 can adjust the fit clearance between the ruler body 3 and the housing 2, preventing friction between the ruler body 3 and the housing 2 from affecting sliding. Preferably, the abutment height of the arc-shaped spring piece 8 is located at the center line of the two threaded through holes 2-4, providing more stable support for both sides of the ruler body 3.

[0025] Various changes, modifications, substitutions, and variations of the described embodiments without departing from the principles and spirit of this utility model still fall within the protection scope of this utility model.

Claims

1. A high-precision digital depth gauge, comprising a base (1), a housing (2), a gauge body (3), a moving grid (4), a fixed grid (5), a measuring rod (6), and a display module (7), characterized in that: The ruler body (3) is longitudinally fixed to the top of the base (1), and the fixed grid (5) is installed on the ruler body (3); the housing (2) has a square ruler hole (2-1) that slides longitudinally with the ruler body (3); the upper end of the measuring rod (6) is fixed to the housing (2), and the lower end passes through the longitudinal measuring rod through hole (1-1) opened in the base (1); The front end of the housing (2) has a moving grid mounting groove (2-2). At least two positioning posts (2-3) arranged in the front-rear direction are installed in the moving grid mounting groove (2-2). The moving grid (4) has mounting holes (4-1) that match the number and position of the positioning posts (2-3). The moving grid (4) is slidably connected to the positioning posts (2-3) and connected and positioned to the moving grid mounting groove (2-2) by structural adhesive.

2. The high-precision digital depth gauge according to claim 1, characterized in that: An arc-shaped spring piece (8) is installed on the inner wall of the left or right side of the square ruler hole (2-1), and two threaded through holes (2-4) are opened on the opposite side. The two ends of the bow-shaped spring (8) are fixed to the side wall of the square ruler hole (2-1), and the bow-shaped section abuts against the ruler body (3); the threaded through hole (2-4) is filled with a ball (9), and the guide screw (10) is screwed into the threaded through hole (2-4) from the outer end so that the ball (9) abuts against the ruler body (3); The contact height of the bow-shaped spring (8) is located between the upper and lower threaded through holes (2-4).

3. The high-precision digital depth gauge according to claim 1, characterized in that: The positioning posts (2-3) are four distributed along the four corners of the rectangle, and the moving grid mounting groove (2-2) has post holes (2-6) for the positioning posts (2-3) to be inserted for positioning.

4. A high-precision digital depth gauge according to claim 1, characterized in that: The housing (2) has a measuring rod positioning hole (2-5) for the top of the measuring rod (6) to be inserted and positioned. The measuring rod (6) is interference-fitted with the measuring rod positioning hole (2-5). The measuring rod positioning hole (2-5) is a circular hole that communicates with the square ruler hole (2-1).

5. A high-precision digital depth gauge according to claim 1, characterized in that: The base (1) has a waist-shaped hole (1-2) at the top that fits into the bottom of the ruler (3), and the bottom of the ruler (3) is press-fitted with the waist-shaped hole (1-2); the measuring rod through hole (1-1) is a circular hole that connects to the waist-shaped hole (1-2).

6. A high-precision digital depth gauge according to claim 1, characterized in that: The ruler body (3) has a grid groove for installing the grid (5) and the scale film (11). The grid (5) and the scale film (11) are sequentially bonded and positioned in the grid groove.

Images