CN-122015614-A - Bending ruler

Abstract

The invention relates to the technical field of measuring tools, and discloses a bending ruler which is universal in inner and outer diameters and used for accurate measurement of obstacle winding and taper holes, the bending ruler comprises a bending platy body, two ends of the bending platy body are fixed with coaxial sliding sleeves, two offset positioning devices are respectively and tightly installed in the sliding sleeves in a sliding and locking manner, each offset positioning device consists of a main ruler, a ruler frame capable of sliding along the main ruler, a positioning part provided with an arc notch and a regulating rod which is inserted into the sliding sleeve and can slide, the mounting fixture at the end of the main scale can respectively clamp the micrometer or the thimble, one side of the scale frame is provided with a fine adjustment mechanism formed by fine adjustment bolts and the like for driving the main scale to do micro axial displacement, the extension length of the thimble is adjustable, the body is provided with a lightening hole, the edge of the body can be also provided with an auxiliary positioning device with a supporting rod and a positioning part, and the auxiliary positioning device and the two positioning parts form a three-point support together on the end face of a workpiece. The bending ruler is simple in structure and convenient to adjust, and can be used for realizing high-precision and repeated measurement under the working conditions of deep holes and the like under the condition that barriers such as boring bars exist in holes.

Inventors

• SUN HONGDA
• JIANG BENQING
• BU JUN
• Sun Fanian

Assignees

• 大连九成船舶重工舵轴有限公司

Dates

Publication Date

20260512

Application Date

20260325

Claims (10)

1. 1. A bending ruler comprising a bending plate-shaped body (1), characterized in that: two identical sliding sleeves (2) are coaxially arranged at two ends of the body (1); two identical offset positioning devices (3) are respectively and slidably arranged in the two sliding sleeves (2); the micrometer (5) and the thimble (4) are respectively detachably arranged on the two identical offset positioning devices (3).
2. 2. A bending ruler according to claim 1, characterized in that the offset locating means (3) comprises: The main scale (31) and cover are established chi frame (32) on main scale (31), main scale (31) can be in axial slip in chi frame (32), and fixed setting location portion (34) in top of chi frame (32), bottom spiro union have regulation pole (35), and the first end of main scale (31) is fixed to be set up mounting fixture (33), and the lateral wall of mounting fixture (33) sets up locking bolt (331) and is used for the locking fixed clamped part.
3. 3. A bending ruler according to claim 2, wherein the end of the ruler frame (32) remote from the mounting clamp (33) is fixedly provided with a fine adjustment mechanism (36).
4. 4. A bending ruler according to claim 3, characterized in that the fine adjustment mechanism (36) comprises: the trimming device is characterized in that the trimming device is sleeved on the main scale (31) and can axially slide, a trimming bolt (362) is arranged in the trimming device body (361) in a penetrating manner, one end of the trimming bolt (362) is fixedly arranged on the side face of the scale frame (32) and extends along the axial direction of the main scale (31) in parallel, a trimming nut (363) is connected to the trimming bolt (362) in a threaded manner, the trimming nut (363) is located in a notch of the trimming device body (361), two end faces of the trimming nut are respectively abutted to two side end faces of the notch, and a locking bolt (364) is arranged on the upper wall of the trimming device body (361) and used for locking the main scale (31).
5. 5. A bending ruler according to claim 4, wherein the positioning part (34) is provided with an arc-shaped notch (341) for accommodating a measuring head of a micrometer (5) or a thimble (4) fixed on the mounting fixture (33).
6. 6. A bending ruler according to claim 5, wherein the extension of the ejector pin (4) is adjustable.
7. 7. A bending ruler according to claim 6, wherein the body (1) is provided with a plurality of lightening holes for lightening the whole weight of the bending ruler while guaranteeing rigidity.
8. 8. A bending ruler according to any of claims 1 to 7, further comprising an auxiliary positioning device (6), the auxiliary positioning device (6) comprising: the auxiliary positioning device comprises an auxiliary positioning device body (601), wherein one end of the auxiliary positioning device body (601) is fixed on the body (1), the other end of the auxiliary positioning device body is fixedly connected with one end of a supporting rod (602), and the other end of the supporting rod (602) is fixedly connected with a positioning part (34).
9. 9. The bending ruler according to claim 8, wherein the length of the support bar (602) is adjustable.
10. 10. A bending ruler according to claim 8, characterized in that the auxiliary positioning means (6) are detachable.

Description

Bending ruler Technical Field The invention relates to the technical field of measuring tools, in particular to a bending ruler which is universal in inner diameter and outer diameter and used for accurately measuring obstacle winding and taper holes, and is suitable for size detection of large-scale shaft holes, deep holes and obstacles such as boring bars, spindles and the like. Background During machining and equipment maintenance, aperture measurement of large size, deep holes or obstructions within the holes is a common and difficult condition. For example, when a machine tool is used for boring deep holes, boring bars are often arranged in the center of the holes, and when a large-scale shaft system is assembled or overhauled, structures such as a main shaft, a supporting piece, a clamp and the like are often arranged in the holes. These obstructions occupy the center of the hole, making it difficult to use the conventional gauges, inside diameter dial gauges, etc. that need to be placed along the center of the hole directly. In actual production, in order to obtain the aperture value on the premise of continuously detaching the boring bar or the main shaft without disconnecting the tool, an operator usually adopts simple tools such as calipers, templates and the like to estimate or compare under the condition of bypassing the obstacle, and then indirectly checks by means of a standard measuring tool. The method has large operational randomness, is obviously influenced by the experience of operators, has large measurement error and poor repeatability, is unfavorable for ensuring the matching precision, often needs to increase working procedures such as grinding, trimming and the like, and causes waste of time and cost. At present, although electronic measuring instruments capable of solving the problems are available on the market, the electronic measuring instruments are high in price and are difficult to purchase for some small and medium-sized enterprises. Meanwhile, the maintenance of the measuring instrument is higher and more strict, and the use environment is limited, for example, some electronic measuring instruments can be interfered by electromagnetic fields to malfunction in the environment with electric welding operation. Therefore, the popularization is difficult and the cost is high. The Chinese patent No. 202119363U, measuring ruler for measuring inner diameter, discloses a structure for measuring the inner diameter of a barrier by utilizing a semicircular arc ruler seat, an inner micrometer and a thimble. According to the scheme, the micrometer and the thimble are respectively arranged at the two ends of the semicircular ruler seat, so that the micrometer and the thimble can bypass the boring bar to realize deep hole inner diameter measurement, and the obstacle detouring measurement problem is solved to a certain extent. However, this solution still has the following disadvantages: Positioning measurement is carried out on two ends of the ruler seat only by means of two-point contact, a stable supporting structure is lacked, swinging is easy to generate under the hand-held state of an operator, and measurement repeatability and precision are affected; The method is mainly oriented to the inner diameter measurement of the cylindrical hole, cannot realize the conversion of the size of the conical hole, and is inconvenient to align to the damaged area of the hole wall for depth measurement and accurate positioning; Mainly faces to the measurement of the inner diameter of the cylindrical hole, the outer diameter cannot be measured; Therefore, a bending ruler which further realizes the inner and outer diameter universality, has a stable supporting, positioning and fine adjusting mechanism and can finish taper hole measurement and damage depth measurement on the basis of inheriting obstacle-surrounding capability is needed, so that the measurement precision, repeatability and application range under complex working conditions are improved. Disclosure of Invention The invention provides a universal bending ruler with inner diameter and outer diameter, which aims at the problems of unstable positioning, inconvenient adjustment, limited measurement precision and repeatability and the like of the existing obstacle-detouring measuring tool, on the premise of ensuring simple and reliable structure, stable supporting and positioning and high-precision fine adjustment measurement are realized, and the method is suitable for detecting the inner diameter and the outer diameter under complex working conditions such as deep holes, large holes and the like. The invention adopts the following technical means: A bending ruler comprises a bending plate-shaped body, two identical sliding sleeves are coaxially arranged at two ends of the body, two identical offset positioning devices are respectively and slidably arranged in the two sliding sleeves, and a micrometer and a thimble are respectively and detachab