阅读说明：本技术 一种剪刀式内径千分尺 (Scissors type inside micrometer ) 是由 高兴军 李源流 王治富 刘文龙 曹许明 徐文 陈儒兵 王淑荣 李志强 张雷 师瑞 于 2020-05-12 设计创作，主要内容包括：本发明公开了一种剪刀式内径千分尺,其结构是在固定尺和游动尺中间通过第一连接销交叉连接,固定尺和游动尺的一端分别设有固定尺触头和游动尺触头,固定尺和游动尺的另一端分别设有U型卡和矩形卡,U型卡与矩形卡之间竖向插接着刻度尺,刻度尺一端通过第二连接销与所述的U型卡相连接,另一端通过倒T形轴横向连接桩与矩形卡相连接,倒T形连接轴为中空结构,刻度尺一端穿过竖向的倒T形连接轴与调节阀相触,调节阀是由可旋转阀体、弹簧、固定圈和限力阀组成,其中可旋转阀体圆周面上设有刻度码,倒T形连接轴上置有固定帽,固定帽的侧壁置有顶丝。本发明的有益效果是：结构简单,使用方便,测量准确,可广泛应用于不同筒体内径的测量。(The invention discloses a scissor type inside micrometer, which is structurally characterized in that a fixed ruler and a movable ruler are connected in a cross mode through a first connecting pin, one end of the fixed ruler and one end of the movable ruler are respectively provided with a fixed ruler contact and a movable ruler contact, the other end of the fixed ruler and the other end of the movable ruler are respectively provided with a U-shaped clamp and a rectangular clamp, a graduated scale is vertically inserted between the U-shaped clamp and the rectangular clamp, one end of the graduated scale is connected with the U-shaped clamp through a second connecting pin, the other end of the graduated scale is connected with the rectangular clamp through an inverted T-shaped shaft transverse connecting pile, the inverted T-shaped connecting shaft is of a hollow structure, one end of the graduated scale penetrates through the vertical inverted T-shaped connecting shaft to be contacted with an adjusting valve, the adjusting valve is composed of a rotatable valve body, a spring, a fixed ring and a force limiting valve, wherein scale codes are arranged on the circumferential surface of the rotatable valve body, a fixing cap is arranged on the inverted T-shaped connecting shaft, and a top thread is arranged on the side wall of the fixing cap. The invention has the beneficial effects that: simple structure, convenient use and accurate measurement, and can be widely applied to the measurement of the inner diameters of different cylinders.)

1. A scissor-type inside micrometer comprises a fixed ruler (1), a movable ruler (2), a U-shaped clamp (4), a rectangular clamp (6), a graduated scale (7), an inverted T-shaped connecting shaft (8) and a regulating valve (9), and is characterized in that the middle of the fixed ruler (1) and the movable ruler (2) is connected in a cross mode through a first connecting pin (3), one end of the fixed ruler (1) and one end of the movable ruler (2) are respectively provided with a fixed ruler contact (101) and a movable ruler contact (202), the other end of the fixed ruler (1) and the other end of the movable ruler (2) are respectively provided with the U-shaped clamp (4) and the rectangular clamp (6), and the graduated scale (7) is vertically inserted between the U-shaped clamp (4) and the rectangular clamp (6); one end of the graduated scale (7) is connected with the U-shaped card (4) through a second connecting pin (5), the other end of the graduated scale is connected with a transverse connecting hole (604) formed in the middle of the fixing plate (601) through an inverted T-shaped shaft transverse connecting pile (801), and the side surface of the rectangular card (6) is provided with symmetrical upper and lower screw holes (603) which are connected with the fixing plate (601) through bolts (602); a fixing cap (901) is arranged on the inverted T-shaped connecting shaft (8), and a jackscrew (906) is arranged on the side wall of the fixing cap (901).

2. A scissors micrometer in inside diameter according to claim 1, wherein the scale (7) is a flat structure, the front and back surfaces are flat surfaces, the same scale codes (702) are arranged on the flat surfaces, the two side walls are arc surfaces, and the arc surfaces are respectively provided with adjusting threads (701).

3. A scissors type inside micrometer according to claim 1, wherein the inverted T-shaped connecting shaft (8) is a hollow structure, one end of the scale (7) passes through the vertical inverted T-shaped connecting shaft (8) to contact the regulating valve (9), and a thread provided on a side surface of the scale (7) is connected with an internal thread of the rotary valve body (902).

4. A scissors type inside micrometer according to claim 1 or 3, wherein the adjusting valve (9) is composed of a rotatable valve body (902), a spring (903), a fixing ring (904) and a force limiting valve (905), wherein the circumferential surface of the rotatable valve body (902) is provided with fine scale codes, the spring (903), the force limiting valve (905) and the fixing ring (904) are arranged in a groove arranged at the upper end of the inner wall, the lower end of the inner wall is provided with symmetrical bosses, and the bosses are contacted with the top end of the inverted T-shaped connecting shaft (8).

5. A scissors inside micrometer according to claim 4, wherein the outer wall of the fixed ring (904) is provided with a rotatable screw thread, and the screw thread is connected with an internal screw thread on the rotary valve body (902), so that the force limiting valve (905) is fixed in the rotary valve body (902) and always has a certain elastic force.

6. A scissors micrometer according to claim 1, wherein the fixed ruler contact (101) and the vernier contact (202) are semicircular to facilitate sliding on the inner wall of the workpiece to be measured, and the end of the scale (7) connected to the U-shaped card (4) is spherical.

Technical Field

The invention belongs to the technical field of a cylinder inner diameter measuring ruler, and particularly relates to a scissor type inner diameter micrometer.

Background

The inside micrometer is an important measuring tool for producing and maintaining the inside diameter of the cylinder, and is an essential measuring tool in the detection and maintenance of the oil well pump cylinder, the water injection pump cylinder and the engine cylinder. The inner diameter measuring tool produced and used in the market at present is expensive, the measuring range is small, the durability is poor, and errors are easy to occur. Chinese patent discloses a reducing pipe internal diameter measuring tool, and the patent number is: 201720805297.8, when the measuring tool is used to measure the inner diameter of the pipe wall, the front end of the clamp is inserted into the measured workpiece, then the inner diameter value D of the workpiece inlet is measured after the handle is opened, and the inner diameter value D of the reducing pipe is obtained by using the method of calculating the coefficient a being L/I and D being a D.

Disclosure of Invention

The invention aims to provide a barrel type inside micrometer with simple structure, convenient use and accurate measurement aiming at the defects in the technology. In order to achieve the purpose, the technical scheme of the invention is as follows: a scissor-type inside micrometer comprises a fixed ruler, a movable ruler, a U-shaped clip, a rectangular clip, a graduated scale, an inverted T-shaped connecting shaft and a regulating valve, wherein the fixed ruler and the movable ruler are in cross connection through a first connecting pin,

one end of the fixed ruler and one end of the movable ruler are respectively provided with a fixed ruler contact and a movable ruler contact, the other end of the fixed ruler and the other end of the movable ruler are respectively provided with a U-shaped clamp and a rectangular clamp, and a graduated scale is vertically inserted between the U-shaped clamp and the rectangular clamp; one end of the graduated scale is connected with the U-shaped clamp through a second connecting pin, the other end of the graduated scale is connected with a transverse connecting hole arranged in the middle of the fixed plate through an inverted T-shaped shaft transverse connecting pile, and the side surface of the rectangular clamp is provided with symmetrical upper and lower screw holes which are connected with the fixed plate through bolts; the reverse T-shaped connecting shaft is provided with a fixing cap, and the side wall of the fixing cap is provided with a jackscrew.

Furthermore, the scale is of a flat structure, the front surface and the back surface of the scale are planes, the same scale codes are arranged on the planes, the two side walls are arc-shaped surfaces, and adjusting threads are respectively arranged on the arc surfaces.

Furthermore, the inverted T-shaped connecting shaft is of a hollow structure, one end of the graduated scale penetrates through the vertical inverted T-shaped connecting shaft to be in contact with the regulating valve, and threads arranged on the side face of the graduated scale are connected with internal threads of the rotary valve body.

Furthermore, the governing valve constitute by rotatable valve body, spring, retainer plate and limit for force valve, wherein be equipped with meticulous scale code on the rotatable valve body circumference, the recess that the inner wall upper end was equipped with embeds there are spring, limit for force valve and retainer plate, the inner wall lower extreme is equipped with the boss of symmetry, this boss touches with the top of falling T-shaped connecting axle.

Furthermore, the outer wall of the fixed ring is provided with a rotatable thread, and the thread is connected with an internal thread on the rotary valve body, so that the force limiting valve is fixed in the rotary valve body and always has certain elasticity.

Furthermore, the fixed ruler contact and the movable ruler contact are semicircular, and one end of the dividing ruler connected with the U-shaped card is spherical.

The invention has the beneficial effects that: the measuring device has the advantages of simple structure, convenience in use and accuracy in measurement, and can be widely applied to measurement of inner diameters of different cylinders and variable-diameter cylinders.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic cross-sectional view of the inverted T-shaped connecting shaft and the regulating valve;

FIG. 3 is a schematic structural view of a rectangular card and an inverted T-shaped connecting shaft;

FIG. 4 is a schematic view of a mounting plate on a rectangular card;

figure 5 is a partial schematic view of a scale. Reference numbers in the drawings: 1-fixing a ruler; 101-fixed ruler contacts; 2-moving the ruler; 202-

A traveling scale contact; 3-a first connecting pin; 4-U type card; 5-a second connecting pin; 6-rectangular card;

a fixing plate; 602-bolt; 603-screw holes; 604-transverse connection holes; 7-a graduated scale; 701-thread; 702-a scale code; 8-inverted T-shaped shaft; 801-inverted T-shaped shaft transverse connecting piles; 9-adjusting valve; 901-a locking cap; 902-rotary valve body; 903-a spring; 904-a retaining ring; 905-force limiting valve; 906-top thread.

Detailed Description

In order to facilitate understanding of those skilled in the art, the embodiments of the present invention will be further described with reference to the accompanying drawings. The scissor type inside micrometer described by figures 1-5 comprises a fixed ruler 1, a movable ruler 2, a U-shaped clip 4, a rectangular clip 6, a graduated scale 7, an inverted T-shaped connecting shaft 8 and a regulating valve 9, wherein the fixed ruler 1 and the movable ruler 2 are connected in a cross way through a first connecting pin 3, one end of the fixed ruler 1 and one end of the movable ruler 2 are respectively provided with a fixed ruler contact 101 and a movable ruler contact 202,

the other ends of the fixed ruler 1 and the movable ruler 2 are respectively provided with a U-shaped clamp 4 and a rectangular clamp 6, and a graduated scale 7 is vertically inserted between the U-shaped clamp 4 and the rectangular clamp 6; one end of the graduated scale 7 is connected with the U-shaped card 4 through a second connecting pin 5, the other end of the graduated scale is connected with a transverse connecting hole 604 arranged in the middle of the fixing plate 601 through an inverted T-shaped shaft transverse connecting pile 801, and the rectangular card 6

The side surface is provided with symmetrical upper and lower screw holes 603 which are connected with the fixing plate 601 through bolts 602; a fixing cap 901 is arranged on the inverted T-shaped connecting shaft 8, and a jackscrew 906 is arranged on the side wall of the fixing cap 901.

In a preferred embodiment, the scale 7 is a flat structure, the front and back surfaces of the scale are flat surfaces, the same scale codes 702 are arranged on the flat surfaces, the two side walls are cambered surfaces, and the cambered surfaces are respectively provided with adjusting threads 701.

In a preferred embodiment, the inverted T-shaped connecting shaft 8 is a hollow structure, one end of the graduated scale 7 penetrates through the vertical inverted T-shaped connecting shaft 8 to be in contact with the regulating valve 9, and threads arranged on the side surface of the graduated scale 7 are connected with internal threads of the rotary valve body 902.

In a preferred embodiment, the regulating valve 9 is composed of a rotatable valve body 902, a spring 903, a fixing ring 904 and a force limiting valve 905, wherein fine scale codes are arranged on the circumferential surface of the rotatable valve body 902, the spring 903, the force limiting valve 905 and the fixing ring 904 are arranged in a groove formed in the upper end of the inner wall, symmetrical bosses are arranged at the lower end of the inner wall, and the bosses are contacted with the top end of the inverted-T-shaped connecting shaft 8.

In a preferred embodiment, the outer wall of the fixing ring 904 is provided with a rotatable screw thread, and the screw thread is connected with an internal screw thread on the rotary valve body 902, so that a certain elastic force always exists when the force limiting valve 905 is fixed in the rotary valve body 902.

In a preferred embodiment, the fixed scale contact 101 and the vernier scale contact 202 have a semicircular shape to facilitate sliding on the inner wall of the work to be measured, and one end of the scale 7 connected to the U-shaped card 4 has a spherical shape.

When the measuring device is used, the fixed ruler and the moving ruler are combined, the graduated scale is adjusted to the position of 0 graduation, the fixed ruler and two contacts on the moving ruler extend into corresponding positions inside a workpiece to be measured, then the force limiting valve on the adjusting valve is slowly screwed, under the action of the spring, the force limiting valve can smoothly rotate and drive the rotary valve body to rotate under the condition of no resistance interference, the included angle between the fixed ruler and the moving ruler is continuously increased, when the ruler contacts of the fixed ruler and the moving ruler touch the end face of the workpiece to be measured, the force limiting valve cannot continuously drive the rotary valve body to rotate under resistance, at the moment, the scale code on the graduated scale exposed at the tail end of the force limiting valve is the preliminary numerical value of the workpiece, and then the corresponding graduation on the circumferential surface of the valve body is read to be the accurate inner diameter value of the workpiece. If the inner diameter value is 302.42 mm, the scale exposed on the scale at the tail end of the force limiting valve is 302-303 mm, 10 scales are uniformly marked on the circumferential surface of the rotary valve body, 10 small scales are arranged between each scale, the arrow is aligned to 42 on the rotary valve body, namely 0.42 mm, and the inner diameter value is 302 mm plus 0.42 mm, namely 302.42 mm.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.