Portable absolute type large-scale length measuring device

Abstract

The utility model belongs to the technical field of length measuring tools, and particularly relates to a portable absolute type large-scale length measuring device, which comprises a grating ruler and a guide rail base, the grating ruler comprises a scale grating, a grating reading head and a display which are matched with each other, and the guide rail base is provided with a linear guide rail. A linear guide rail is arranged on the guide rail base, a movable measuring seat is arranged on the linear guide rail, a fixed measuring seat is arranged on the guide rail base, a scale grating is arranged on the guide rail base or the linear guide rail, and a grating reading head is arranged on the movable measuring seat. Therefore, the grating ruler is used for measuring the length, the measurement precision is high, the use requirement of high-precision measurement can be met through absolute measurement, and high-precision measurement is more convenient.

Description

TECHNICAL FIELD

[0001] The utility model belongs to length measuring tool technical field, concretely relates to a portable absolute type large -scale length measuring device. BACKGROUND

[0002] Large -scale length measuring device is used more in processing industry, scientific research, building drawing etc. field, and the precision requirement of measuring device is different in different application scene. For some application scene of industrial production, the requirement of measuring precision is higher, and the large -scale length measuring device on the market is measured after being calibrated by comparison at present, and this measurement mode belongs to relative type measurement mode, and the measuring device needs to be repeatedly compared, and it is inconvenient to additionally purchase a calibration instrument. Compared with relative type measurement, absolute type measurement is directly compared with the basic unit of the measured length of the measured object, and the absolute type measurement does not need to be compared, and can directly give the measurement result, and the absolute type length measuring device has the insufficient of low precision at present, for example, the measuring precision of some absolute type measuring device can reach 0.01mm, and it is already the absolute type measuring instrument of high precision, but the precision can not meet the high-precision measurement requirement. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at providing a portable absolute type large -scale length measuring device, to realize through absolute type measurement to meet the high-precision measurement use demand by the portable absolute type large -scale length measuring device, so that high-precision measurement is more convenient.

[0004] In order to realize the above object, the utility model adopts the following technical scheme:

[0005] Provide a portable absolute type large -scale length measuring device, including grating ruler, the grating ruler includes the ruler grating of being matched, grating reading head and display, still including guide rail base, is equipped with linear guide on the guide rail base, is equipped with mobile measuring seat on the linear guide, is equipped with fixed measuring seat on the guide rail base, the ruler grating is arranged on the guide rail base or linear guide, the grating reading head is arranged on the mobile measuring seat, is equipped with the first measuring head for clamping in the fixed measuring seat on the side of measured object, is equipped with the second measuring head for clamping on the mobile measuring seat on the other side of measured object, the mobile measuring seat can move along the linear guide and approach or away from the fixed measuring seat, so that the grating reading head reads the length of measured object through the ruler grating.

[0006] Preferably, the first measuring head and the second measuring head each include an L-shaped measuring head holder, a measuring head baffle insertion slot is provided on the measuring head holder, and a measuring head baffle is provided in the measuring head baffle insertion slot.

[0007] Preferably, a measuring head mounting plate is arranged below the mobile measuring seat and the fixed measuring seat respectively, and a measuring head frame embedding groove is arranged at the bottom of the measuring head mounting plate, and the top of the measuring head frame is arranged in the measuring head frame embedding groove.

[0008] Preferably, a measuring head frame connecting screw hole is arranged in the measuring head frame embedding groove, a long screw hole is correspondingly arranged on the measuring head frame, and the measuring head frame is fixedly connected to the measuring head frame connecting screw hole through a bolt penetrating through the long screw hole.

[0009] Preferably, a support foot plate is arranged at the bottom of the measuring head baffle.

[0010] Preferably, a fine adjustment device is arranged on one side of the mobile measuring seat, the fine adjustment device comprises a U-shaped frame, the U-shaped frame is movably arranged on one side of the mobile measuring seat, a fine adjustment screw rod is further arranged between the U-shaped frame and the mobile measuring seat, and a locking knob for locking the U-shaped frame on the guide rail base or the linear guide rail is arranged on the U-shaped frame.

[0011] Preferably, a handle is further arranged on both sides of the top of the guide rail base.

[0012] Preferably, the guide rail base is a 7075 aluminum guide rail base.

[0013] Compared with the prior art, the portable absolute large length measuring device comprises a grating ruler, the grating ruler comprises a matched scale grating, a grating reading head and a display, further comprises a guide rail base, a linear guide rail is arranged on the guide rail base, a mobile measuring seat is arranged on the linear guide rail, a fixed measuring seat is arranged on the guide rail base, the scale grating is arranged on the guide rail base or the linear guide rail, and the grating reading head is arranged on the mobile measuring seat, so that the grating ruler is used to measure the length, the measurement precision is high, the absolute measurement can meet the high-precision measurement use requirement, and the high-precision measurement is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present application, and constitute a part of the specification, and are used to explain the present application together with embodiments of the present application, and do not constitute a limitation to the present application. In the drawings:

[0015] Figure 1 It is a front view of an embodiment of the portable absolute large length measuring device of the present application.

[0016] Figure 2 It is a bottom view of an embodiment of the portable absolute large length measuring device of the present application.

[0017] Figure 3This is a right view of an embodiment of the portable absolute large length measuring device of this utility model.

[0018] In the diagram, the labels represent: 1. Grating reading head; 2. Display; 3. Guide rail base; 31. Handle; 4. Linear guide rail; 5. Moving measuring seat; 5. Probe mounting plate; 51. Probe holder embedding slot; 511. Fixed measuring seat; 6. First probe; 7. Second probe; 8. Probe holder; 81. Probe baffle embedding slot; 811. Long screw hole; 812. Probe baffle; 82. Support foot plate; 83. Fine adjustment device; 9. U-shaped frame; 91. Guide rod; 92. Fine adjustment screw; 93. Locking knob; 94. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] In one embodiment, a portable absolute large-scale length measuring device is provided, such as... Figures 1-3 As shown, this portable absolute large-scale length measuring device includes a grating ruler, which is a moving distance measuring instrument utilizing the optical principle of gratings. The grating ruler includes a matching scale grating, a grating reading head 1, and a display 2. When the grating reading head 1 moves relative to the scale grating, it converts the light signal into a digital pulse signal and displays the length data on the display 2. Figures 1-3 As shown, the portable absolute large length measuring device also includes a guide rail base 3, which is a rigid, slender strip plate that mainly serves as a support. A linear guide rail 4 is fixedly installed at the bottom of the guide rail base. The linear guide rail 4 is a rigid, slender guide rail that mainly serves as a linear guide. A movable measuring seat 5 is provided on the linear guide rail 4. The movable measuring seat 5 has a guide rail groove that matches the linear guide rail 4. A fixed measuring seat 6 is provided on the guide rail base 3. The fixed measuring seat 6 is fixedly installed on the left end of the guide rail base 3.

[0021] The scale grating of the grating ruler is arranged on the rear side of the guide rail base 3, the grating reading head 1 is arranged on the moving measuring seat 5, the first measuring head 7 for clamping on one side of the measured object is arranged on the fixed measuring seat 6, the second measuring head 8 for clamping on the other side of the measured object is arranged on the moving measuring seat 5, the moving measuring seat 5 can move along the linear guide rail 4 to approach or move away from the fixed measuring seat 6, when the moving measuring seat 5 moves along the linear guide rail 4, the grating reading head 1 can move relative to the scale grating, so that the grating reading head 1 reads the distance between the first measuring head 7 and the second measuring head 8 through the scale grating, and the distance is the length of the measured object.

[0022] Based on the above embodiment, the portable absolute large length measuring device includes a guide rail base, a linear guide rail arranged on the guide rail base, and a moving measuring seat arranged on the linear guide rail. The scale grating of the grating ruler is arranged on the guide rail base, and the grating reading head is arranged on the moving measuring seat, so that the grating ruler is used to measure the length, and the measuring precision is high. In the above embodiment, the resolution of the grating ruler is 0.0001 mm, that is, the resolution of the portable absolute large length measuring device for measuring the length reaches 0.0001 mm. By integrating the grating ruler on the guide rail base and the moving measuring seat, the measuring device is highly integrated, and the whole device has the characteristics of miniaturization, can be easily moved, and is convenient to carry.

[0023] Further, in another embodiment, as shown in Figures 1-3 the first measuring head 7 and the second measuring head 8 in the portable absolute large length measuring device are arranged in the same structure in left-right symmetry. Taking the second measuring head 8 as an example, it includes an L-shaped measuring head frame 81, the measuring head frame 81 includes a top horizontal plate and a vertical plate on one side of the horizontal plate, a measuring head baffle embedding groove 811 is arranged on the vertical plate of the measuring head frame 81, a measuring head baffle 82 is arranged in the measuring head baffle embedding groove 811, the side of the measuring head baffle 82 facing the first measuring head is a measuring surface for abutting on the measured object, the measuring surface needs high flatness, and the measuring head baffle 82 can be fixedly installed in the measuring head baffle embedding groove 811 by screws screwed downward from the top of the measuring head frame 81. The first measuring head 7 and the second measuring head 8 are arranged by arranging the measuring head frame, and then the measuring head baffle is arranged in the measuring head baffle embedding groove, so that the measuring head baffle for directly contacting the measured object can be individually processed, which is beneficial to guarantee the processing precision of the measuring head baffle, thereby guaranteeing the measuring precision. And the left and right sides of the measuring head baffle embedding groove can constrain the measuring head baffle, thereby improving the installation precision of the measuring head baffle.

[0024] Further, in another embodiment, as shown in Figures 1-3As shown, the portable absolute large length measuring device is provided with a probe mounting plate below the movable measuring seat 5 and the fixed measuring seat 6. Taking the probe mounting plate 51 at the bottom of the movable measuring seat 5 as an example, key grooves are respectively provided on the bottom surface of the movable measuring seat 5 and the top surface of the probe mounting plate 51, so as to set a positioning key 52 therebetween, and then the probe mounting plate 51 is fixedly installed on the bottom surface of the movable measuring seat 5 through screws at four corners thereof. Figure 2 As shown, the probe mounting plate 51 is provided with a probe holder embedding groove 511 at the bottom thereof, the width of the probe holder embedding groove 511 is consistent with the width of the top plate of the probe holder 81, the top plate of the probe holder 81 is arranged in the probe holder embedding groove 511, and the probe holder 81 is positioned and the installation accuracy is ensured through the arrangement of the probe holder embedding groove 511.

[0025] Further, in another embodiment, as shown in the drawings, Figures 1-3 As shown, the portable absolute large length measuring device is provided with a probe holder connecting screw hole in the probe holder embedding groove 511, and a long screw hole 812 is correspondingly provided on the top plate of the probe holder 81, the top plate of the probe holder 81 is fixedly connected to the probe holder connecting screw hole through a bolt passing through the long screw hole 812, and the installation position of the probe holder 81 in the left-right direction can be finely adjusted through the arrangement of the long screw hole 812.

[0026] Further, in another embodiment, as shown in the drawings, Figures 1-3 As shown, the probe holder 82 of the portable absolute large length measuring device is provided with a support foot plate 83 at the bottom thereof, and the support foot plate 83 is integrally formed with the probe holder 82. Similarly, the probe holder at the bottom of the fixed measuring seat 6 is also provided with a support foot plate, and the portable absolute large length measuring device can be stably supported on the ground through the support foot plate.

[0027] Further, in another embodiment, as shown in the drawings, Figures 1-3As shown, the portable absolute large length measuring device is provided with a fine adjustment device 9 on one side of the moving measuring seat 5, which is used to fine adjust the moving position of the moving measuring seat 5. The fine adjustment device 9 comprises a U-shaped frame 91, which is movably arranged on one side of the moving measuring seat 5. Specifically, guide rods 92 are arranged between the bottom of the U-shaped frame 91 and the moving measuring seat 5 on both sides, and the movement of the U-shaped frame 91 is guided by the guide rods 92. A fine adjustment screw 93 is further arranged between the middle of the bottom of the U-shaped frame 91 and the moving measuring seat 5. The front end of the fine adjustment screw 93 is threadedly connected with the moving measuring seat 5 through a high-precision thread, and the rear end of the fine adjustment screw 93 is provided with an end cap for screwing. A locking knob 94 is arranged on the U-shaped frame 91 for locking the U-shaped frame 91 on the guide rail base 3. The fine adjustment device 9 is used in the case of fine adjustment during the length measurement. When the fine adjustment device 9 is used, the U-shaped frame 91 is first locked by the locking knob 94 pressing against the guide rail base 3, and then the end cap at the rear end of the fine adjustment screw 93 is screwed, so that the moving measuring seat 5 is pushed forward, and the moving measuring seat 5 is moved forward.

[0028] Further, in another embodiment, as shown in the drawings, Figure 1 The portable absolute large length measuring device is further provided with a handle 31 on the top of the guide rail base 3 on both sides, so as to be portable.

[0029] Further, in another embodiment, as shown in the drawings, Figure 1 The guide rail base 3 in the portable absolute large length measuring device is a 7075 aluminum guide rail base. The material is light in quality, convenient to carry, high in strength, wear-resistant, and not easy to deform after long-term use.

[0030] It should be noted that, in the present document, the terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0031] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A portable absolute large-scale length measuring device, comprising a grating ruler, said grating ruler including a matching scale grating, a grating reading head, and a display, characterized in that, It also includes a guide rail base, on which a linear guide rail is provided, on which a movable measuring seat is provided, and on which a fixed measuring seat is provided, the scale grating is provided on the guide rail base or the linear guide rail, the grating reading head is provided on the movable measuring seat, the fixed measuring seat is provided with a first probe for locking onto one side of the object being measured, and the movable measuring seat is provided with a second probe for locking onto the other side of the object being measured. The movable measuring seat can move along the linear guide rail to approach or move away from the fixed measuring seat, so that the grating reading head reads the length of the object being measured through the scale grating.

2. The portable absolute large-scale length measuring device according to claim 1, characterized in that: Both the first probe and the second probe include an L-shaped probe frame, on which a probe baffle is provided, and a probe baffle is provided in the probe baffle embedding groove.

3. The portable absolute large-scale length measuring device according to claim 2, characterized in that: A probe mounting plate is provided below the movable measuring base and the fixed measuring base respectively. The bottom of the probe mounting plate is provided with a probe holder embedding groove, and the top of the probe holder is set in the probe holder embedding groove.

4. The portable absolute large-scale length measuring device according to claim 3, characterized in that: The probe holder is provided with a probe holder connecting screw hole in the probe holder embedding groove, and the probe holder is provided with a corresponding elongated screw hole. The probe holder is fixedly connected to the probe holder connecting screw hole by a bolt passing through the elongated screw hole.

5. The portable absolute large-scale length measuring device according to claim 2, characterized in that: The probe baffle is equipped with a support foot plate at the bottom.

6. The portable absolute large-scale length measuring device according to claim 1, characterized in that: A fine-tuning device is provided on one side of the movable measuring seat. The fine-tuning device includes a U-shaped frame, which is movably mounted on one side of the movable measuring seat. A fine-tuning screw is also provided between the U-shaped frame and the movable measuring seat. A locking knob is provided on the U-shaped frame for locking it onto the guide rail base or linear guide rail.

7. The portable absolute large-scale length measuring device according to claim 1, characterized in that: Handles are also provided on both sides of the top of the guide rail base.

8. The portable absolute large-scale length measuring device according to claim 1, characterized in that: The guide rail base is a 7075 aluminum guide rail base.

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