Coaxiality detection tool for rapidly detecting two excircles

Abstract

The utility model discloses a coaxiality detection tool for rapidly detecting two outer circles. The coaxiality detection tool comprises a bearing sleeve, a bearing cover, a clamping cone, a taper sleeve, a spacer bush, a precision bearing, a gauge clamping rod and a dial gauge. The clamping cone is arranged in the center of the interior of the taper sleeve; a precision bearing is mounted at each of the two ends of the outer circle of the taper sleeve; the two precision bearings are separated by a spacer bush; the bearing sleeve is mounted on the outer rings of the two precision bearings, is pressed through the two bearing covers, and is assembled into a whole through the screw I; the meter clamping rod is connected to the outer circle of the bearing sleeve through a screw II; the dial gauge is installed at the outer end of the gauge clamping rod and is pressed tightly through a screw III. The dial gauge can be driven by the bearing sleeve and the gauge clamping rod to rotate by 360 degrees around the axis of the precision bearing. The device is simple in structure, scientific and reasonable in design, low in cost and convenient and fast to operate, and solves the problems that the coaxiality detection of two outer circles is complex and slow in speed.

Description

Technical Field

[0001] This utility model belongs to the field of coaxiality inspection tool technology, and in particular relates to a coaxiality inspection tool for rapid detection of two outer circles. Background Technology

[0002] The application of coaxiality inspection of parts is very common in the machining industry. Coaxiality refers to the positioning deviation between the axis of the reference cylindrical surface and the axis of the measuring cylindrical surface. Researchers have studied coaxiality inspection fixtures and proposed several solutions. For example, Chinese patent application number 202221929860.X discloses a coaxiality inspection fixture, including a positioning post, a first inspection sleeve, a second inspection sleeve, and a first elastic element. The positioning post extends along a first direction and has a positioning part for positioning the inspection reference of the workpiece. The first inspection sleeve can slide relative to the positioning post. The first inspection sleeve has a first inspection hole for detecting the coaxiality of the first circumferential feature of the workpiece relative to the inspection reference. The second inspection sleeve is slidably disposed relative to the positioning post. The second inspection sleeve has a second inspection hole for detecting the coaxiality of the second circumferential feature of the workpiece relative to the inspection reference. The first elastic element is elastically supported between the first and second inspection sleeves. For example, Chinese patent application number 202322395282.7 discloses a hollow shaft coaxiality inspection tool, comprising: a shaft seat for mounting the shaft to be tested; and an inspection fixture including an indicator rod and a measuring rod, the indicator rod and the measuring rod being hinged together by a self-closing hinge, one end of the indicator rod being provided with a displacement gauge, the probe of the displacement gauge being connected to the measuring rod; the shaft seat including a first slide groove and a second slide groove, the first slide groove and the second slide groove being vertically arranged, a first slider being lockably slidably connected in the first slide groove, a second slider being lockably slidably connected in the second slide groove, a first V-block being provided at the top of the first slider, and a second V-block being provided at the top of the second slider; it also includes a horizontal slide rail and a base, the horizontal slide rail being fixedly mounted on the base, one of the first slide groove and the second slide groove being lockably slidably connected to the horizontal slide rail, and the other being located at one end of the horizontal slide rail and fixedly connected to the base.

[0003] The coaxiality of two outer circles is usually measured using a coordinate measuring machine (CMM). However, due to the complexity and slow speed of CMM testing, it cannot be implemented on the production floor. For companies without CMM equipment, it is impossible to measure the coaxiality of two outer circles. When using two center holes for positioning and a runout tester, only the coaxiality of the two outer circles with respect to the common axis of the two centers can be detected, but it cannot reflect the true coaxiality of the two outer circles. Utility Model Content

[0004] The purpose of this invention is to provide a convenient, fast, and easy-to-operate tool for quickly detecting the coaxiality of two outer circles, so as to solve the problems of complex and slow detection of the coaxiality of two outer circles.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A rapid coaxiality testing tool for two outer circles includes a bearing sleeve, a bearing cap, a clamping cone, a conical sleeve, a spacer, a precision bearing, a dial indicator rod, and a dial indicator. The clamping cone is placed in the center inside the conical sleeve. A precision bearing is installed at each end of the outer circle of the conical sleeve. The two precision bearings are separated by a spacer. The bearing sleeve is installed on the outer rings of the two precision bearings and is pressed together by two bearing caps, assembled into a single unit with screw I. The dial indicator rod is connected to the outer circle of the bearing sleeve by screw II. The dial indicator is installed at the outer end of the dial indicator rod and pressed together by screw III. The dial indicator can rotate 360° around the axis of the precision bearing by the drive of the bearing sleeve and the dial indicator rod.

[0007] This utility model further includes a gland, a nut, and a bolt. The bolt, nut, and gland, when used together, allow the workpiece to be fixed onto the coaxiality gauge.

[0008] The present invention further explains that the clamping cone is made of alloy steel and has elastic glue injected into the longitudinal groove, which has good elasticity.

[0009] This utility model further explains that the outer conical surface of the clamping cone and the inner conical surface of the cone sleeve are precision ground to achieve a precise fit.

[0010] In the loosened state, the workpiece to be measured (the part being measured) can be inserted into the inner cavity of the clamping cone. When the bolt is tightened, the cone sleeve moves to the left, and the inner cone surface evenly presses against the outer cone surface of the clamping cone, so that the clamping cone fits tightly against the outer circle of the part being measured without gaps. The measuring head of the dial indicator makes perpendicular contact with the outer circle of the other end of the part being measured. Driven by the clamping rod, the dial indicator rotates around the axis of the outer circle of one end of the part being measured, and the reading of the dial indicator is the specific value of its coaxiality.

[0011] This invention further explains that the clamping rod is a telescopic rod. The telescopic rod can adapt to the measured parts of different lengths.

[0012] Compared with existing technologies, the present invention has the following advantages:

[0013] 1. This utility model has a simple structure and low cost, which can solve the problem of high testing costs in the prior art.

[0014] 2. The present invention has a scientific and reasonable structural design, is convenient and quick to operate, and solves the problems of complex and slow detection of the coaxiality of two outer circles.

[0015] 3. This utility model, through the precise fit between the clamping cone and the cone sleeve, allows the clamping cone to fit tightly against the outer circle of the part being measured without any gaps, making the data measured by the dial indicator more accurate. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of an embodiment of the present invention.

[0017] Reference numerals: 1-Screw I, 2-Bearing sleeve, 3-Bearing cap, 4-Glander cap, 5-Nut, 6-Bolt, 7-Clamping cone, 8-Conical sleeve, 9-Spacer, 10-Precision bearing, 11-Clamping rod, 12-Screw II, 13-Screw III, 14-Dial indicator. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings. Example

[0019] like Figure 1 As shown, a rapid coaxiality testing tool for two outer circles includes a bearing sleeve 2, a bearing cover 3, a clamping cone 7, a cone sleeve 8, a spacer 9, a precision bearing 10, a gauge rod 11, and a dial indicator 14. The clamping cone 7 is placed in the center inside the cone sleeve 8. A precision bearing 10 is installed at each end of the outer circle of the cone sleeve 8. The two precision bearings 10 are separated by the spacer 9. The bearing sleeve 2 is installed on the outer ring of the two precision bearings 10 and is pressed by the two bearing covers 3, and assembled into a whole by screw I1. The gauge rod 11 is connected to the outer circle of the bearing sleeve 2 by screw II12. The dial indicator 14 is installed on the outer end of the gauge rod 11 and is pressed by screw III13. The dial indicator 14 can rotate 360° around the axis of the precision bearing 10 by the drive of the bearing sleeve 2 and the gauge rod 11.

[0020] The inspection fixture in this embodiment also includes a pressure cap 4, a nut 5, and a bolt 6.

[0021] When using the gauge in this embodiment, first, the bolt 6 is passed through the part to be measured, and one end of the part to be measured is inserted into the inner cavity of the clamping cone 7. Then, the pressure cap 4 is placed on the protruding end of the bolt 6, and then the nut 5 is tightened. When the bolt 6 is tightened, the cone sleeve 8 moves to the left, and the inner cone surface of the cone sleeve 8 evenly presses the outer cone surface of the clamping cone 7, so that the clamping cone 7 fits tightly against the outer circle of the part to be measured without gaps. At this time, the measuring head of the dial indicator 14 is in vertical contact with the outer circle of the other end of the part to be measured. Then, driven by the clamping rod 11, the dial indicator 14 rotates around the outer circle axis of one end of the part to be measured, and the reading of the dial indicator 14 is the specific value of its coaxiality.

[0022] As a further explanation of this embodiment, the clamping cone 7 is made of alloy steel and has elastic glue injected into the longitudinal groove to give it good elasticity.

[0023] As a further explanation of this embodiment, the outer conical surface of the clamping cone 7 and the inner conical surface of the cone sleeve 8 are precision ground to achieve a precise fit.

[0024] As one of the preferred embodiments of this example, the clamp rod 11 is a telescopic rod.

[0025] Obviously, the above embodiments are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. For those skilled in the art, other variations or modifications can be made based on the above description; it is neither necessary nor possible to exhaustively list all possible implementations here; however, obvious variations or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A rapid coaxiality inspection tool for two outer circles, characterized in that: The instrument includes a bearing sleeve (2), a bearing cover (3), a clamping cone (7), a cone sleeve (8), a spacer (9), a precision bearing (10), a gauge rod (11), and a dial indicator (14). The clamping cone (7) is placed in the center inside the cone sleeve (8). A precision bearing (10) is installed at each end of the outer circle of the cone sleeve (8). The two precision bearings (10) are separated by a spacer (9). The bearing sleeve (2) is installed on the outer ring of the two precision bearings (10) and pressed by the two bearing covers (3), and assembled into one piece by screw I (1). The gauge rod (11) is connected to the outer circle of the bearing sleeve (2) by screw II (12). The dial indicator (14) is installed on the outer end of the gauge rod (11) and pressed by screw III (13). The dial indicator (14) can rotate 360° around the axis of the precision bearing (10) by the drive of the bearing sleeve (2) and the gauge rod (11).

2. The rapid detection fixture for the coaxiality of two outer circles according to claim 1, characterized in that: It also includes a pressure cap (4), a nut (5), and a bolt (6).

3. The rapid detection fixture for the coaxiality of two outer circles according to claim 1, characterized in that: The clamping cone (7) is made of alloy steel and has elastic glue injected into the longitudinal groove.

4. The rapid detection fixture for the coaxiality of two outer circles according to claim 1, characterized in that: The outer conical surface of the clamping cone (7) and the inner conical surface of the cone sleeve (8) are precision ground together for a precise fit.

5. The rapid detection fixture for the coaxiality of two outer circles according to claim 1, characterized in that: The clamp rod (11) is a telescopic rod.

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