Non-full-circle arc measuring device

Abstract

The utility model relates to the technical field of measuring devices, in particular to a non-full-circle arc measuring device. A measuring tool body is fixedly connected below a display dial plate, a T-shaped seat is connected to the bottom of the measuring tool body, an ejector rod steel ball linked with the display dial plate is arranged at the bottom of the T-shaped seat, a supporting steel ball I is arranged on the left side of the T-shaped seat, and a supporting steel ball II and a supporting steel ball III are arranged on the right side of the T-shaped seat. The supporting steel ball I, the supporting steel ball II and the supporting steel ball III abut against the arc part of the workpiece to be measured and are reflected to the display dial plate through the position of the ejector rod steel ball for arc measurement. The beneficial effects of the utility model are that the utility model provides a measuring device suitable for mass production process quality control aiming at the problems and defects in the prior art, the device is suitable for mass production, the measuring cost is low, the measuring tool is convenient to operate, and the measuring efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring devices, in particular to a non-full circle arc measuring device. Background Art

[0002] In existing mechanical equipment, batch processing of bearing holes in engine and hydraulic piston pump housings requires arc measurement. Most of the existing arc measuring tools are generally developed and manufactured based on the measurement of arcs of full circles or those larger than semicircles. The measurement of arcs smaller than semicircles or with only a very small local angle has always been a difficult problem in the mechanical processing industry. How to accurately and precisely measure the size of such arcs restricts the quality stability and reliability of such products.

[0003] The commonly used method of measuring arcs is to pre-process a standard sample hole with a sufficiently large material. When processing the finished product, the sample hole is sent to the three-coordinate measuring machine or the inner hole measuring tool is used for measurement and calibration. If the size is not qualified, the machine tool parameters are readjusted and the sample hole is reprocessed until the sample hole is qualified, and then the finished product is processed according to this machine tool parameter. In the subsequent processing process, according to experience, after processing a certain number of products, it is necessary to reprocess the sample hole according to the first piece for verification and adjust the machine tool and tool parameters, which is a great waste of materials and labor.

[0004] To this end, the present application designs a non-full circle arc measuring device to solve the above problems. Summary of the invention

[0005] In order to make up for the deficiencies in the prior art, the utility model provides a non-full circle arc measuring device.

[0006] A non-full circle arc measuring device, comprising a display dial, characterized in that:

[0007] A measuring body is fixedly connected below the display dial, and a T-shaped seat is connected to the bottom of the measuring body. A push rod steel ball for linking the display dial is provided at the bottom of the T-shaped seat. A supporting steel ball I is provided on the left side of the T-shaped seat, and supporting steel balls II and III are provided on the right side of the T-shaped seat. Supporting steel balls I, II and III are in contact with the arc part of the workpiece to be measured, and the position of the push rod steel ball is reflected on the display dial to perform arc measurement.

[0008] Furthermore, in order to better realize the utility model, the measuring body is a hollow cylinder with a through hole inside. The top of the measuring body is connected to the display dial, and the bottom is fastened to the T-shaped seat by a threaded pair. A fastening nut is also fastened to the bottom of the measuring body for backup to prevent the thread from loosening during the measurement process, which affects the accuracy of the measured dimensional precision.

[0009] Furthermore, in order to better realize the utility model, a long push rod that can move axially is installed in the through hole of the measuring body, the bottom of the long push rod is in contact with a short push rod, the short push rod passes through the measuring body and the T-shaped seat, the bottom of the short push rod extends out of the T-shaped seat, and the bottom of the short push rod is provided with a steel ball fixing hole and is equipped with a push rod steel ball.

[0010] Furthermore, in order to better implement the utility model, the push rod steel ball can rotate freely in the steel ball fixing hole.

[0011] Further, in order to better realize the utility model, a steel ball fixing hole is provided at the center of the left side of the T-shaped seat, and a supporting steel ball I is installed in the hole, and it can rotate freely in the steel ball fixing hole. Two steel ball fixing holes are evenly distributed on the left and right sides of the right center line position of the T-shaped seat, and supporting steel balls II and III are respectively installed in them, and both can rotate freely in the steel ball fixing holes.

[0012] Furthermore, in order to better realize the utility model, the supporting steel balls I, II and III are spatially distributed on the same horizontal plane, and the plane is perpendicular to the short push rod.

[0013] Furthermore, in order to better implement the present invention, the T-shaped seat has a symmetrical structural layout relative to the center line.

[0014] Furthermore, in order to better realize the present invention, the non-full circle arc measuring device is equipped with an auxiliary ring gauge for zeroing the measuring device. The auxiliary ring gauge has two arc grooves, namely an upper ring gauge and a lower ring gauge. The arc size of the upper ring gauge corresponds to the upper limit of the arc size of the workpiece being measured, and the arc size of the lower ring gauge corresponds to the lower limit of the arc size of the workpiece being measured.

[0015] The beneficial effects of the utility model are:

[0016] The utility model aims at providing a measuring device suitable for mass production process quality control in view of the difficulties and shortcomings of the prior art. The device is suitable for mass production, has low measuring cost, convenient measuring tool operation and high measuring efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a main structural sectional view of the utility model;

[0018] Figure 2 It is a left view of the utility model;

[0019] Figure 3 It is a right side view of the utility model;

[0020] Figure 4 This is a schematic diagram of the utility model when measuring a workpiece;

[0021] Figure 5 This is a schematic diagram of the structure of the auxiliary ring gauge of the utility model;

[0022] Figure 6 This is a schematic diagram of the utility model when using an auxiliary ring gauge.

[0023] In the figure,

[0024] 1. Display dial, 2. Specific measurement, 3. Long push rod, 4. Short push rod, 5. Fastening nut, 6. T-seat, 7. Support steel ball I, 8. Push rod steel ball, 9. Support steel ball II, 10. Support steel ball III, 11. Auxiliary ring gauge, 12. Upper ring gauge, 13. Lower ring gauge. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only some embodiments of the utility model, not all embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the utility model provided in the accompanying drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents selected embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0027] Figure 1-Figure 6 This is a specific embodiment of the utility model, which is a non-full circle arc measurement device. Figure 1 Figure 2 Figure 3 As shown, the measuring body 2 is hollow in design and has a cylindrical structure. A through hole is provided inside. One end of the measuring body 2 is connected to the display dial 1, and the other end is fastened to the T-shaped seat 6 through a threaded pair. The fastening nut 5 is fastened to the measuring body 2 to play a tightening role to prevent the thread from loosening during the measurement process, which affects the accuracy of the measured dimensional accuracy; a long push rod 3 is installed in the through hole of the measuring body 2, and the long push rod 3 can move freely axially in the hole; a short push rod 4 passes through the inner hole of the measuring body 2 and contacts with the long push rod 3 at one end, and a steel ball fixing hole is provided at one end, on which a push rod steel ball 8 is installed, and passes through the T-shaped seat together with the short push rod 4 and extends from the lower end of the T-shaped seat; the push rod steel ball 8 can rotate freely in the steel ball fixing hole.

[0028] like Figure 4As shown, during measurement, the push rod steel ball 8 first contacts the measured arc, and due to the support steel balls I7, II9 and III10 distributed on the left and right sides of the T-shaped seat 6, the T-shaped seat 6 is positioned on the surface of the measured arc. Under the positioning and support of the support steel balls I7, II9 and III10, a reference horizontal plane is formed in space, and the reference horizontal plane is perpendicular to the push rod steel ball 8. The distance difference measured between the reference horizontal plane and the reference horizontal plane is transmitted to the long push rod 3 in a 1:1 ratio through the short push rod 4, and then transmitted to the display head in a 1:1 ratio, and displayed by the pointer of the display dial 1.

[0029] like Figure 5 , Figure 6 As shown, during comparison and calibration, the push rod steel ball 8 first contacts the arc of the upper ring gauge 12 or the lower ring gauge 13 of the auxiliary ring gauge 11, and the T-shaped seat 6 is positioned on the arc of the upper ring gauge or the lower ring gauge due to the supporting steel balls I7, II9 and III10 distributed on the left and right sides of the T-shaped seat 6. Under the positioning support of the supporting steel balls I7, II9 and III10, a reference horizontal plane is formed in space, and the reference horizontal plane is perpendicular to the push rod steel ball 8. The distance difference measured between the reference horizontal plane and the reference horizontal plane is transmitted to the long push rod 3 in a 1:1 ratio through the short push rod 4, and then transmitted to the display head in a 1:1 ratio, and the pointer is set to zero by rotating the display dial 1.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the utility model by ordinary technicians in this field should be included in the scope of the claims of the utility model as long as they do not depart from the spirit and scope of the technical solution of the utility model.

Claims

1. A non-full circle arc measuring device, comprising a display dial (1), characterized in that: A measuring body (2) is fixedly connected below the display dial (1), and a T-shaped seat (6) is connected to the bottom of the measuring body (2). A push rod steel ball (8) is provided at the bottom of the T-shaped seat (6), a supporting steel ball I (7) is provided on the left side of the T-shaped seat (6), and a supporting steel ball II (9) and a supporting steel ball III (10) are provided on the right side of the T-shaped seat (6). The supporting steel balls I (7), II (9) and III (10) are in contact with the arc portion of the workpiece to be measured, and the position of the push rod steel ball (8) is reflected on the display dial (1) to perform arc measurement.

2. The non-full circle arc measuring device according to claim 1, characterized in that: The measuring body (2) is a hollow cylinder with a through hole therein. The top of the measuring body (2) is connected to the display dial (1), and the bottom is fastened to the T-shaped seat (6) through a threaded pair. A fastening nut (5) is also fastened to the bottom of the measuring body (2) for backup tightening to prevent the thread from loosening during the measurement process, thereby affecting the accuracy of the measured dimensional precision.

3. The non-full circle arc measuring device according to claim 1, characterized in that: A long push rod (3) that can move axially is installed in the through hole of the measuring body (2), the bottom of the long push rod (3) is in contact with a short push rod (4), the short push rod (4) passes through the measuring body (2) and the T-shaped seat (6), the bottom of the short push rod (4) protrudes out of the T-shaped seat (6), and the bottom of the short push rod (4) is provided with a steel ball fixing hole and is equipped with a push rod steel ball (8).

4. The non-full circle arc measuring device according to claim 3, characterized in that: The push rod steel ball (8) can rotate freely in the steel ball fixing hole.

5. The non-full circle arc measuring device according to claim 1, characterized in that: A steel ball fixing hole is provided at the center of the left side of the T-shaped seat (6), and a supporting steel ball I (7) is installed in the hole and can rotate freely in the steel ball fixing hole; Two steel ball fixing holes are evenly distributed on the left and right sides of the right center line of the T-shaped seat (6), and a supporting steel ball II (9) and a supporting steel ball III (10) are respectively installed therein, and both can rotate freely in the steel ball fixing holes.

6. The non-full circle arc measuring device according to claim 5, characterized in that: The supporting steel balls I (7), II (9) and III (10) are spatially distributed on the same horizontal plane, and the plane is perpendicular to the short push rod (4).

7. The non-full circle arc measuring device according to claim 1, characterized in that: The T-shaped seat (6) has a symmetrical structural layout relative to the center line.

8. The non-full circle arc measuring device according to claim 1, characterized in that: The incomplete circle arc measuring device is equipped with an auxiliary ring gauge (11) for performing zero calibration on the measuring device. The auxiliary ring gauge (11) is provided with two arc grooves, namely an upper ring gauge (12) and a lower ring gauge (13). The arc size of the upper ring gauge (12) corresponds to the upper limit of the arc size of the workpiece being measured, and the arc size of the lower ring gauge (13) corresponds to the lower limit of the arc size of the workpiece being measured.

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