Vernier caliper for measuring tall products

Abstract

The utility model belongs to a measuring instrument, and particularly relates to a vernier caliper for measuring tall products, which comprises a main scale and a vernier, symmetrical lower measuring jaws are arranged at the lower ends of the main scale and the vernier, and is characterized in that a hollow sliding block is sleeved on the two lower measuring jaws, a sliding block fastening bolt is arranged at the inner end of the sliding block, a vertical extension rod hole is arranged on the outer side of the sliding block, and the extension rod hole is connected with the vernier. An extension rod is arranged in the extension rod hole, and an extension rod fastening bolt is arranged at the outer end of the sliding block. The device has the advantages of being reasonable in structure, low in cost, convenient to use and wide in application range. A plurality of sets of lower measuring jaws do not need to be prepared, only two sets of sliding blocks and extension rods need to be prepared, the requirements for machining precision of the sliding blocks and the extension rods are low, and cost is reduced; 2) the sliding block is sleeved on the lower measuring jaw, the installation belongs to lossless installation, the original function of the lower measuring jaw is not influenced, and 3) the length of the two extension rods is adjusted, the operation is simple, the outer diameter of a tall product and the projection size of an inclined plane / bevel edge can be conveniently and rapidly measured, and the application range is wide.

Description

Technical Field

[0001] The utility model belongs to a measuring instrument, in particular to a vernier caliper for measuring tall products. Background Art

[0002] A vernier caliper is a measuring tool for measuring length, inner and outer diameters, and depth. The vernier caliper consists of a main scale and a slidable vernier attached to the main scale. The upper and lower ends of the main scale and the vernier are respectively provided with symmetrical upper jaws (inner measuring jaws) and lower jaws (outer measuring jaws). Generally, the upper jaws are used to measure the inner diameter, and the lower jaws are used to measure the outer diameter. The height of the lower jaws of a traditional vernier caliper is fixed. For tall products, the lower jaws cannot clamp the two ends of the product to be measured and cannot measure the product size. In order to solve this problem, those skilled in the art have developed a vernier caliper with replaceable lower jaws, such as the invention patent technology of a vernier caliper disclosed by the China Patent Office on April 3, 2013, with publication number CN103017624A, which is named as a vernier caliper, which includes a main scale, a depth scale, a vernier, an inner measuring jaw and an outer measuring jaw. The length of the two measuring jaws is 30% to 60% of the length of the main scale, and the two measuring jaws are detachably connected to the main scale.

[0003] The above solution increases the length of the two measuring claws, so that the caliper can measure the workpiece size that the conventional vernier caliper cannot measure. However, the vernier caliper of the above structure also has the following defects:

[0004] 1) It is necessary to prepare measuring claws of various lengths and specifications, and the machining precision of the measuring claws is high, resulting in relatively high costs;

[0005] 2) The measuring claws are detachably connected (threaded or pinned) to the main scale and the vernier. The steps for replacing the measuring claws each time are cumbersome, and the wear of the connecting parts after multiple disassembly and assembly will affect the measurement accuracy. Utility Model Content

[0006] The utility model aims to provide a vernier caliper for measuring tall and large products. Slide blocks and extension rods are arranged on two lower measuring jaws. By adjusting the lengths of the two extension rods, the lengths of the lower measuring jaws are extended in disguise, so as to facilitate the measurement of the outer diameter of the tall and large products.

[0007] The utility model is realized by the following technical solutions:

[0008] That is, a vernier caliper for measuring tall products, including a main scale and a vernier. The lower ends of the main scale and the vernier are provided with symmetrical lower measuring jaws. The characteristic is that a hollow slider is mounted on the two lower measuring jaws, the inner end of the slider is provided with a slider fastening bolt, the outer side of the slider is provided with a vertical extension rod hole, the extension rod is provided in the extension rod hole, and the outer end of the slider is provided with an extension rod fastening bolt.

[0009] The slider of the utility model is preferably arranged in the middle of the lower measuring jaw without changing the original structure of the lower end of the lower measuring jaw. After the slider and the extension rod are removed, the lower measuring jaw can still be used normally, that is, it can still be used as an ordinary vernier caliper after the slider and the extension rod are removed.

[0010] The extension rod of the utility model can adopt a straight rod structure. In this case, the distance between the two extension rods cannot be equal to the distance between the two lower measuring claws. The value on the main ruler cannot be read directly, and the distance between the two extension rods and the lower measuring claws on the side where they are located needs to be added.

[0011] In order to solve the above problems, further, the extension rod of the utility model has a three-section structure, including a vertical upper section, a horizontal middle section and a vertical lower section, and the inner side of the lower section is flush with the inner side of the lower measuring claw on the same side.

[0012] With the above arrangement, the inner side of the lower section of the extension rod is flush with the inner side of the lower measuring claw on the same side. The distance between the lower sections of the two extension rods is the distance between the two lower measuring claws, and the value on the main ruler can be directly read.

[0013] The vernier caliper of the above structure can still be used as an ordinary vernier caliper after the slider and the extension rod are removed.

[0014] Furthermore, a groove is concavely provided on the inner side of the middle part of the two lower measuring claws of the utility model, and the slider fastening bolt is completely located in the groove.

[0015] The slider fastening bolt is completely located in the groove and does not affect the alignment of the two lower measuring jaws. Through the above arrangement, it can still be used as an ordinary vernier caliper without removing the slider and the extension rod.

[0016] Furthermore, a bubble level is provided on the cursor of the utility model.

[0017] The utility model can not only measure the outer diameter of tall products, but also measure the projection size of the inclined surface / beveled edge of tall products (the two extension rods have different lengths). When measuring the projection size of the inclined surface / beveled edge, the vernier caliper needs to be kept in a horizontal state. With the help of a bubble level, the vernier caliper can be kept in a horizontal state more conveniently.

[0018] The utility model discloses a bubble level, also known as a cylindrical level bubble or a balanced level bubble, and is a mature commercial product in the prior art.

[0019] The utility model has the advantages of reasonable structure, low cost, convenient use and wide application range.

[0020] 1) No need to prepare multiple sets of lower measuring jaws, only two sets of sliders and extension rods are needed. The machining accuracy requirements of the sliders and extension rods are low, which reduces the cost;

[0021] 2) The slider is installed on the lower measuring claw, which is a non-destructive installation and does not affect the original function of the lower measuring claw;

[0022] 3) The utility model can adjust the length of two extension rods, is easy to operate, and can conveniently and quickly measure the outer diameter and the projection size of the bevel / bevel of tall products, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0024] Figure 2 for Figure 1 AA section view of the middle slider;

[0025] Figure 3 This is a schematic diagram of the structure of Embodiment 2 of the present utility model;

[0026] Figure 4 This is a schematic diagram of the structure of Example 3 of the utility model.

[0027] As shown in the figure: 1. Main ruler; 2. Vernier; 3. Upper measuring claw; 4. Slider; 5. Extension rod fastening bolt; 6. Slider fastening bolt; 7. Extension rod; 7-1. Upper section; 7-2. Middle section; 7-3. Lower section; 8. Lower measuring claw; 9. Groove; 10. Extension rod hole; 11. Bubble level. DETAILED DESCRIPTION

[0028] The following is a detailed description of the embodiments of the technical solution of the utility model in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the scope of protection of the utility model. It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should be the common meanings understood by technicians in the field to which the utility model belongs.

[0029] Embodiment 1, as Figure 1 , Figure 2 As shown: the upper and lower ends of the main scale 1 and the vernier 2 are respectively provided with two symmetrical upper measuring claws 3 and lower measuring claws 8, the middle parts of the two lower measuring claws 8 are square sections, and a slider 4 is mounted on the square section of each lower measuring claw 8, and the slider 4 is provided with a sliding hole with a rectangular cross-section and a circular extension rod hole, the inner end of the slider is provided with a slider fastening bolt 6 communicated with the slider, and the outer end is provided with an extension rod fastening bolt 5 communicated with the extension rod hole 10, and a linear extension rod 7 is installed in the extension rod hole 10.

[0030] When the utility model measures the outer diameter of a tall product, the extension rod fastening bolt 5 and the slider fastening bolt 6 are loosened, and the lengths of the two extension rods 7 are adjusted synchronously so that the lower ends of the two extension rods 7 clamp the product, and the value on the main scale 1 is read, and the distance between the two extension rods 7 and the lower measuring claws 8 on the side where they are located is added, so that the outer diameter of the tall product can be obtained.

[0031] When the utility model measures the projection size of the inclined surface / bevel of a tall product, the lengths of the two extension rods 7 are adjusted asynchronously. When the main ruler 1 is kept horizontal, the lower ends of the two extension rods 7 are respectively pressed against the upper and lower ends of the inclined surface / bevel. The value on the main ruler 1 is read, and the distance between the two extension rods 7 and the lower measuring claws 8 on the side where they are located is added to obtain the projection size of the inclined surface / bevel of the tall product.

[0032] In this embodiment, after the slider 4 is removed, the lower measuring claw 8 is restored to its original state and restored to be used as an ordinary vernier caliper.

[0033] Embodiment 2, as Figure 3 As shown: the extension rod 7 is a three-section structure, including a vertical upper section 7-1, a horizontal middle section 7-2 and a vertical lower section 7-3. The inner side of the lower section 7-3 is flush with the inner side of the lower measuring claw 8 on the side where it is located. The rest is the same as in Example 1.

[0034] This embodiment is used in the same manner as the first embodiment, except that the value on the main scale 1 can be directly read in this embodiment, which is more convenient to use.

[0035] Embodiment 3, as Figure 4 As shown: a bubble level 11 is provided on the vernier 2, a groove 9 is concavely provided on the inner side of the middle of the two lower measuring claws 8, and the slider fastening bolt 6 is completely located in the groove 9, and the rest is the same as in embodiment 1.

[0036] This embodiment is used in the same manner as embodiment 2.

[0037] This embodiment is different from Embodiment 1 and Embodiment 2 in that, without disassembling the slider 4 and the extension rod 7, the two lower measuring jaws 8 can still be aligned (the two slider fastening bolts 6 are completely located in the corresponding grooves 9), and can still be used as an ordinary vernier caliper.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features can be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A vernier caliper for measuring tall products, comprising a main scale and a vernier, wherein the lower ends of the main scale and the vernier are provided with symmetrical lower measuring claws, characterized in that A hollow slider is mounted on the two lower measuring claws, a sliding hole with a rectangular cross-section is provided on the slider, a slider fastening bolt is provided at the inner end of the slider, a vertical extension rod hole is provided on the outer side of the slider, an extension rod with a straight rod structure or a three-section structure is provided in the extension rod hole, an extension rod fastening bolt is provided at the outer end of the slider, the extension rod is a three-section structure, including a vertical upper section, a horizontal middle section and a vertical lower section, the inner side of the lower section is flush with the inner side of the lower measuring claw on that side, a groove is concave on the inner side of the middle part of the two lower measuring claws, and the slider fastening bolt is completely located in the groove.

2. A vernier caliper for measuring tall products according to claim 1, characterized in that There is a bubble level on the vernier.

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