A high-precision measuring rod limiting mechanism for a displacement measuring device

Abstract

The utility model provides a kind of high-precision measuring rod limiting mechanism for displacement measuring equipment, including watchcase, lower sleeve, lower guide sleeve, measuring rod and fixed grid seat, fixed grid seat is slid along the longitudinal through hole of watchcase, annular upper guide sleeve is fixedly connected on longitudinal through hole upper end, the left and right sides of fixed grid seat are the arc surface of longitudinal sliding fit with upper guide sleeve inner ring;Two symmetric adjusting screws are assembled on the back of upper guide sleeve, adjusting screw front end acts on the back of fixed grid seat, and the clearance adjustment and parallelism adjustment of moving grid sensor and fixed grid sensor can be realized by adjusting the adjusting screw on the back of upper guide sleeve.The high-precision measuring rod limiting mechanism of the utility model, the clearance and parallelism of moving grid and fixed grid are adjustable, can reduce the processing difficulty of digital dial micrometer mechanical component, ensure the measurement accuracy of digital dial micrometer.

Description

Technical Field

[0001] This utility model relates to the field of digital display measuring equipment technology, specifically a high-precision measuring rod limiting mechanism for displacement measuring equipment. Background Technology

[0002] Displacement measurement equipment, including dial indicators, displacement sensors, and direct-acting micrometers, is an indispensable tool in the production and R&D processes of the machinery industry. Large-range digital dial indicators, in particular, are widely used in high-precision measurement scenarios due to their extremely high measurement accuracy and excellent performance. Digital dial indicators typically consist of mechanical components and electronic display components. The linear displacement of the measuring rod drives an internal sensor, which converts the mechanical displacement into an electrical signal. This signal is then processed by the circuitry and displayed digitally to visually represent the length measurement result.

[0003] The mechanical components of a digital dial indicator consist of a moving grating sensor and a fixed grating sensor, which work together to produce linear displacement to complete the measurement. The moving grating sensor and the display module are mounted on the dial indicator housing, while the fixed grating sensor is mounted on the measuring rod via a fixed grating mount and moves linearly with it, generating relative displacement. High-precision measurements require extremely high precision in the gap and parallelism between the moving and fixed grating sensors; failure to meet these requirements will result in significant measurement errors.

[0004] Existing digital dial indicators primarily ensure the gap and parallelism between the moving and fixed grating sensors through machining of mechanical components, but lack the function of adjusting the gap and parallelism between the moving and fixed gratings. This structure requires extremely high precision in machining, easily leading to a high scrap rate. Furthermore, the existing structure cannot adjust the gap and parallelism between the moving and fixed gratings in practical applications, failing to meet the requirements of high-precision measurement.

[0005] Based on the above problems, a high-precision measuring rod limiting mechanism for displacement measurement equipment needs to be proposed to ensure the gap and parallelism between the moving grid and the fixed grid, and reduce the processing difficulty of the mechanical components of the digital micrometer. Utility Model Content

[0006] This invention provides a high-precision measuring rod limiting mechanism for displacement measuring equipment. The gap and parallelism between the moving grid and the fixed grid are adjustable, which can reduce the processing difficulty of the mechanical components of the digital micrometer and ensure the measurement accuracy of the digital micrometer.

[0007] To achieve the above-mentioned technical objectives and effects, this utility model solves the above-mentioned problems through the following technical solution:

[0008] A high-precision measuring rod limiting mechanism for displacement measuring equipment includes a housing, a lower sleeve, a lower guide sleeve, a measuring rod, and a fixed grid seat. The housing has a longitudinal through hole. The lower sleeve and the lower guide sleeve are sequentially installed at the lower end of the longitudinal through hole. The fixed grid seat slides longitudinally along the longitudinal through hole with the measuring rod. An annular upper guide sleeve is fixedly connected to the upper end of the longitudinal through hole of the housing. The fixed grid seat is fixedly connected to the measuring rod. The left and right sides of the fixed grid seat are arc-shaped surfaces that slide longitudinally with the inner ring of the upper guide sleeve. Two symmetrical adjusting screw holes are horizontally opened on the back of the upper guide sleeve. The housing has an adjusting through hole for the adjusting screw to pass through and engage with the threaded adjusting screw hole. The front end of the adjusting screw acts on the back of the fixed grid seat.

[0009] Furthermore, the fixed grid base adopts a columnar structure with a rounded rectangular cross-section, and a measuring rod mounting hole is opened in the middle for the measuring rod to pass through; multiple longitudinally arranged assembly holes are opened on the back of the fixed grid base, and positioning screws pass through the mounting holes and engage with the measuring rod threads to lock the measuring rod.

[0010] Furthermore, a fastening screw hole is horizontally opened at the middle position of the back of the upper guide sleeve, and an assembly hole corresponding to the fastening screw hole is opened on the watch case. The fastening screw and the fastening screw hole are threaded together to fix the upper guide sleeve to the watch case.

[0011] The advantages and effects of this utility model are:

[0012] This utility model proposes a high-precision measuring rod limiting mechanism for displacement measuring equipment. It is equipped with two adjusting screws on the left and right sides acting on the fixed grid seat. By adjusting the screws, the rotation angle of the fixed grid seat can be adjusted, thereby realizing the gap adjustment and parallelism adjustment between the moving grid sensor and the fixed grid sensor, overcoming the problem that traditional machining cannot meet the gap and parallelism requirements.

[0013] Meanwhile, the measuring rod and the fixed grid seat form a whole, which is guided by the upper guide sleeve and the lower guide sleeve in the longitudinal sliding direction. The fixed grid seat and the upper guide sleeve adopt the arc surface guide cooperation. The deflection of the fixed grid seat on the circumference will not affect the longitudinal guidance of the upper guide sleeve, which can better meet the angle adjustment requirements of the fixed grid seat and effectively ensure the stable longitudinal sliding of the measuring rod. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is an exploded view of the present invention;

[0016] Figure 3 This is a back structure diagram of the present invention;

[0017] Figure 4 For along Figure 3 Sectional view of line AA in the middle;

[0018] Figure 5 for Figure 3The main sectional view of the structure shown.

[0019] Part number markings: 1. Case, 2. Lower sleeve, 3. Lower guide sleeve, 4. Measuring rod, 5. Fixed grid seat, 6. Upper guide sleeve, 61. Adjusting screw hole, 62. Fastening screw hole, 7. Adjusting screw, 8. Fastening screw. Detailed Implementation

[0020] The present invention will be further described below with reference to the embodiments, but the present invention is not limited to these embodiments.

[0021] This embodiment describes a high-precision measuring rod limiting mechanism for displacement measuring equipment, as shown in the attached figure. Figure 1-5 As shown, the main body includes a case 1, a lower sleeve 2, a lower guide sleeve 3, a measuring rod 4, a fixed grid seat 5, an upper guide sleeve 6, an adjusting screw 7, and a fastening screw 8. A longitudinal through hole is opened in the middle of the case 1. The upper guide sleeve 6 and the lower sleeve 2 are respectively installed at the upper and lower ends of the longitudinal through hole. The top of the lower sleeve 2 is inserted into the longitudinal through hole and positioned by a screw. The lower guide sleeve 3 is installed at the bottom of the lower sleeve 2 by interference fit.

[0022] A fastening screw hole 62 is horizontally opened at the middle of the back of the upper guide sleeve 6. The watch case 1 has an assembly hole corresponding to the fastening screw hole 62. The fastening screw 8 is threaded into the fastening screw hole 62 to fix the upper guide sleeve 6 into the longitudinal through hole of the watch case 1, as shown in the attached figure. Figure 4 As shown.

[0023] The measuring rod 4 and the fixed grid seat 5 together slide along the longitudinal through hole of the case 1 under the guidance of the upper guide sleeve 6 and the lower guide sleeve 3. A measuring rod mounting hole for the measuring rod 4 to pass through is opened in the middle of the fixed grid seat 5, and multiple longitudinally arranged assembly holes are opened on the back of the fixed grid seat 5, which lock the measuring rod 4 in place with positioning screws. The fixed grid seat 5 adopts a columnar structure with a rounded rectangular cross-section, and its left and right sides are arc-shaped surfaces that slide longitudinally with the inner ring of the upper guide sleeve 6. Therefore, the upper guide sleeve 6 can effectively guide the grid seat 5 longitudinally at any angle of deflection. The bottom end of the measuring rod 4 passes through the lower guide sleeve 3 and slides longitudinally with it.

[0024] Two symmetrical adjusting screw holes 61 are horizontally opened on the back of the upper guide sleeve 6. The housing 1 has an adjusting through hole for the adjusting screw 7 to pass through and engage with the threaded screw holes 61. The front end of the adjusting screw 7 acts on the back of the fixed grid seat 5. The fixed grid sensor is mounted on the fixed grid seat 5. By adjusting the two adjusting screws 7, the deflection angle of the fixed grid seat 5 can be adjusted and locked, thereby adjusting the gap and parallelism between the moving grid sensor and the fixed grid sensor, reducing the radial wobble of the fixed grid seat, and improving the measurement accuracy.

[0025] The high-precision measuring rod limiting mechanism for displacement measurement equipment in this embodiment can adjust the gap and parallelism between the moving grid sensor and the fixed grid sensor by adjusting the adjusting screws 7 on both sides. The upper guide sleeve 6 and the lower guide sleeve 3 can effectively guide the measuring rod 4 and the fixed grid seat 5 as a whole, ensuring improved measurement accuracy.

[0026] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations of these 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 measuring rod limiting mechanism for a displacement measuring device, comprising a housing (1), a lower sleeve (2), a lower guide sleeve (3), a measuring rod (4), and a fixed grid seat (5), wherein the housing (1) has a longitudinal through hole, the lower sleeve (2) and the lower guide sleeve (3) are sequentially installed at the lower end of the longitudinal through hole, and the fixed grid seat (5) slides longitudinally along the longitudinal through hole with the measuring rod (4), characterized in that: The upper end of the longitudinal through hole of the watch case (1) is fixedly connected to an annular upper guide sleeve (6), and the fixed grid seat (5) is fixedly connected to the measuring rod (4). The left and right sides of the fixed grid seat (5) are arc-shaped surfaces that slide longitudinally with the inner ring of the upper guide sleeve (6). The upper guide sleeve (6) has two symmetrical adjustment screw holes (61) on the back. The watch case (1) has an adjustment through hole for the adjustment screw (7) to pass through and threadedly engage with the adjustment screw hole (61). The front end of the adjustment screw (7) acts on the back of the fixed grid seat (5).

2. The high-precision measuring rod limiting mechanism for displacement measuring equipment according to claim 1, characterized in that: The fixed grid base (5) adopts a columnar structure with a rounded rectangular cross section, and a measuring rod mounting hole is opened in the middle for the measuring rod (4) to pass through; multiple assembly holes are arranged longitudinally on the back of the fixed grid base (5), and the positioning screws pass through the mounting holes and engage with the measuring rod (4) to lock the measuring rod (4).

3. The high-precision measuring rod limiting mechanism for displacement measuring equipment according to claim 1, characterized in that: The upper guide sleeve (6) has a horizontal fastening screw hole (62) at the middle position on the back. The watch case (1) has an assembly hole corresponding to the fastening screw hole (62). The fastening screw (8) is threaded into the fastening screw hole (62) to fix the upper guide sleeve (6) to the watch case (1).

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