Gauge for taper hole

Abstract

The utility model provides a taper hole gauge, which relates to the technical field of measuring tools for measuring parts, and comprises a measuring block, the measuring block is in the shape of a circular truncated cone, a groove is arranged between the side wall and the lower bottom surface of the measuring block, the groove is arranged towards the central axis of the measuring block, and the cross section of the groove is in the shape of a right trapezoid; the handle part is vertically arranged on the lower bottom surface of the measuring block, and the handle part and the central axis of the measuring block are coaxially arranged; wherein a step is arranged between the groove surface of the groove and the outer wall of the handle part, the groove surface, which is vertical to the central axis of the measuring block, on the groove is a through end, and the lower bottom surface, which is not intersected with the handle part, on the measuring block is a stop end. According to the utility model, the measurement of the large-end diameter and the taper angle of the taper hole on the part is combined into a whole, so that the processing and measuring time is shortened, the operation is simple and fast, and the reworking and repairing risk is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring tools for parts measurement, in particular to a gauge for tapered holes. Background Art

[0002] The existing methods for detecting tapered holes include digital caliper measurement, CMM three-coordinate measurement, optical detection, X-ray detection and ultrasonic detection. Among them, digital caliper measurement gives the result of whether the large end diameter and the taper angle of the tapered hole after processing are qualified. It takes a long time, about 2-3 minutes, and has the disadvantages of large execution uncertainty and large method uncertainty; CMM three-coordinate measurement is measured on a three-coordinate measuring machine after the part is processed. There is a situation of lagging in the evaluation of the processing size of the part, and there is a risk of rework and repair; optical detection is simple to operate and fast, but has high requirements for light and environment; X-ray detection and ultrasonic detection are both characterized by high precision, high sensitivity and non-destructiveness, but the two methods have high requirements for equipment and technology, and are also difficult to operate. In summary, in the detection of tapered holes for large quantities of long parts, digital caliper measurement and CMM three-coordinate measurement methods are basically used, while the method of using a digital caliper to measure the large end diameter of the taper of the part and using a three-coordinate measuring machine to measure the taper angle has the disadvantages of long measurement time, low production efficiency and the risk of rework and repair. Utility Model Content

[0003] The utility model provides a gauge for a tapered hole to solve the shortcomings of long measuring time, low production efficiency and risk of rework and repair when a digital caliper measures the large end diameter of a taper of a part and a three-dimensional coordinate measuring machine measures the taper angle. The gauge combines the measurement of the large end diameter of a tapered hole on a part and the taper angle into one, shortens the processing and measuring time, is simple and quick to operate, and avoids the risk of rework and repair.

[0004] The technical solution adopted by the utility model is:

[0005] A gauge for a tapered hole is provided, comprising:

[0006] A measuring block, the measuring block is in the shape of a truncated cone, a groove is provided between the side wall and the lower bottom surface of the measuring block, the groove is provided toward the central axis of the measuring block, and the cross section of the groove is a right-angled trapezoid; a handle, the handle is vertically arranged on the lower bottom surface of the measuring block and coaxially arranged with the central axis of the measuring block; wherein a step is provided between the groove surface of the groove and the outer wall of the handle, the groove surface on the groove perpendicular to the central axis of the measuring block is a through end, and the part of the lower bottom surface of the measuring block that does not intersect with the handle is a stop end.

[0007] In some embodiments of the utility model, a screw hole with a "T"-shaped cross-section is provided on the lower bottom surface of the measuring block, and a stud is provided at one end of the handle connected to the measuring block, and the stud is threadedly connected to the measuring block through the screw hole.

[0008] In some embodiments of the utility model, a fixing ring is sleeved on the outer wall of the handle, and a circular ring is provided at one end of the fixing ring facing the measuring block, the circular ring is coaxial with the central axis of the fixing ring, the outer wall of the circular ring is flush with the outer wall of the fixing ring, and the inner diameter of the circular ring is equal to the diameter of the measuring block at the lower bottom surface, the height of the circular ring along its own central axis direction is greater than the height from the upper bottom surface to the lower bottom surface of the measuring block, and a protective cover is threadedly connected to the other end of the circular ring.

[0009] In some embodiments of the utility model, a plurality of spring sheets are inclined toward one end of the protective cover of the measuring block, the plurality of spring sheets are distributed in a ring shape along the center point of the protective cover, and the extension lines of each spring sheet toward the measuring block intersect at the same point, and a cleaning brush is provided at one end of each spring sheet toward the measuring block.

[0010] In some embodiments of the utility model, a first through hole is provided on the free end of the handle, the first through hole extends along the axial direction of the handle, a second through hole connected to the first through hole is provided inside the stud, the handle is slidably connected to a clamping rod through the first through hole, a card is provided at one end of the clamping rod close to the stud, and a hand-held portion located on the outside of the handle is provided at the other end, a clamping slot located in the screw hole is provided on the measuring block, and the clamping slot is adapted to the card; wherein the aperture of the first through hole is smaller than the aperture of the second through hole.

[0011] In some embodiments of the present invention, a gasket located on the screw hole is provided on the measuring block.

[0012] In some embodiments of the present invention, a knurled pattern is provided on the side wall of the handle.

[0013] The beneficial effects of the utility model are:

[0014] 1. Put the measuring block into the tapered hole to be tested by holding the handle, and gradually move the measuring block along the central axis direction of the tapered hole. When the measuring block can no longer be fed toward the tapered hole, place the knife edge ruler on the surface of the part with the tapered hole and the through end of the groove opened by the measuring block, and place a feeler gauge in the gap between the knife edge ruler and the through end. If the feeler gauge can pass through, the through end can enter; then place the knife edge ruler on the other end of the part surface, and move the knife edge ruler toward the through end of the measuring block. If the knife edge ruler stops before moving to the stop end of the measuring block, it means that the stop end cannot pass through the tapered hole, which proves that the size of the tapered hole on the part is qualified. If the knife edge ruler can move to the stop end surface of the measuring block, and the feeler gauge can pass through the gap between the knife edge ruler and the stop end of the measuring block, it means that the stop end can pass through the tapered hole, which proves that the size of the tapered hole on the part is unqualified, that is, compared with the existing gauges for measuring tapered holes, the utility model can shorten the time for testing the quality of tapered holes;

[0015] 2. When measuring the cone angle on the tapered hole, evenly apply the red lead powder on the outer wall of the measuring block, then hold the handle and push the measuring block toward the inside of the tapered hole. When the measuring block can no longer move toward the inside of the tapered hole, hold the handle tightly and rotate the handle back and forth to make the measuring head rotate back and forth in the tapered hole. After rotating back and forth many times, hold the handle to take the measuring block out of the tapered hole and observe the red lead powder applied on the outer wall of the measuring block. If the contact area between the measuring block and the tapered surface is not less than 85%, there will be horizontal stripes on the red lead powder distributed along the rotation direction of the handle, so as to achieve the effect of judging the cone angle and personality of the part. That is, the utility model solves the problem of measuring the large end diameter and cone angle on the tapered hole separately, and improves the detection efficiency of the tapered hole processing parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 Main view of the taper hole gauge Figure 1 ;

[0018] Figure 2 It is a schematic diagram of the structure of the gauge for tapered holes;

[0019] Figure 3 This is a schematic diagram of the structure of the protective cover in the tapered hole gauge;

[0020] Figure 4 It is a schematic diagram of the structure of the spring sheet in the gauge for tapered holes;

[0021] Figure 5 This is a schematic diagram of the structure of the clamping rod in the tapered hole gauge;

[0022] Figure 6 For gauges for tapered holes;

[0023] Figure 7 Main view of the taper hole gauge Figure 2 ;

[0024] Figure 8 Schematic diagram of the measurement of the tapered hole gauge.

[0025] Reference numerals:

[0026] 1-measuring block, 10-groove, 11-screw hole, 12-card slot, 2-handle, 20-stud, 21-first through hole, 22-second through hole, 23-clamp rod, 24-card, 25-handle, 26-arc groove, 27-knurled pattern, 3-fixing ring, 30-round ring, 31-protective cover, 32-spring sheet, 33-cleaning brush, 4-gasket, 5-parts, 6-knife edge ruler, 7-feeler gauge. DETAILED DESCRIPTION

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention.

[0029] The embodiments of the utility model are described in detail below with reference to the accompanying drawings.

[0030] Example

[0031] like Figure 1 and Figure 8 As shown, this embodiment provides a gauge for a tapered hole, comprising:

[0032] The measuring block 1 is in the shape of a truncated cone, a groove 10 is provided between the side wall and the bottom surface of the measuring block 1, and the groove 10 is provided toward the central axis of the measuring block 1, and the cross section of the groove 10 is a right-angled trapezoid;

[0033] A handle 2, which is vertically arranged on the lower bottom surface of the measuring block 1 and coaxially arranged with the central axis of the measuring block 1;

[0034] There is a step between the groove surface of the groove 10 and the outer wall of the handle 2. The groove surface of the groove 10 perpendicular to the central axis of the measuring block 1 is the through end, and the lower bottom surface of the measuring block 1 that does not intersect with the handle 2 is the end.

[0035] The groove 10 is formed at the connection between the side wall and the bottom surface of the measuring block 1. The axial section of the measuring block 1 at the central axis is a right-angle trapezoid and is formed in a direction perpendicular to the central axis of the handle 2. If the cross-sectional view of the handle 2 and the measuring block 1 is taken in the direction of the central axis of the handle 2, the plain line length on the side of the measuring block 1 where the groove 10 is formed is shorter than the plain line length on the other side where no treatment is performed. In this view, there is a step between the connection between the handle 2 and the measuring block 1 and the groove surface of the groove 10, and the bottom surface of this part where the groove 10 is formed is the through end, and the other bottom surface where no treatment is performed is the end.

[0036] When in use, by holding the handle 2, the measuring block 1 is placed in the tapered hole to be tested, and the measuring block 1 is gradually moved along the central axis direction of the tapered hole. When the measuring block 1 can no longer be fed toward the tapered hole, the knife edge ruler 6 is placed on the surface of the part 5 with the tapered hole and the through end of the groove 10 opened by the measuring block 1, and the feeler gauge 7 is placed in the gap between the knife edge ruler 6 and the through end. If the feeler gauge 7 can pass through, the through end can enter; then the knife edge ruler 6 is placed on the other end of the surface of the part 5, and the knife edge ruler 6 is directed toward the measuring block 1. If the knife-edge ruler 6 stops before moving to the stop end of the measuring block 1, it means that the stop end cannot pass through the tapered hole, which proves that the size of the tapered hole on the part 5 is qualified. If the knife-edge ruler 6 can move to the stop end surface of the measuring block 1 and the feeler gauge 7 can pass through the gap between the knife-edge ruler 6 and the stop end of the measuring block 1, it means that the stop end can pass through the tapered hole, which proves that the size of the tapered hole on the part 5 is unqualified. That is, compared with the existing gauge for measuring tapered holes, the time for testing the quality of tapered holes can be shortened.

[0037] When it is necessary to measure the cone angle on the tapered hole, the red lead powder is evenly applied on the outer wall of the measuring block 1, and then the handle 2 is held and the measuring block 1 is pushed toward the inside of the tapered hole. When the measuring block 1 can no longer move toward the inside of the tapered hole, the handle 2 is held tightly and the measuring head is rotated back and forth in the tapered hole. After rotating back and forth many times, the measuring block 1 is taken out of the tapered hole by holding the handle 2, and the red lead powder applied on the outer wall of the measuring block 1 is observed. If the contact area between the measuring block 1 and the tapered surface is not less than 85%, there will be horizontal stripes on the red lead powder distributed along the rotation direction of the handle 2, so that the cone angle and personality of the part 5 can be judged. That is, the utility model solves the problem of measuring the large end diameter and the cone angle on the tapered hole separately, and improves the detection efficiency of the tapered hole processing part 5.

[0038] Further, such as Figure 2 As shown, a screw hole 11 with a T-shaped cross section is provided on the lower bottom surface of the measuring block 1 , and a stud 20 is provided at one end of the handle 2 connected to the measuring block 1 , and the stud 20 is threadedly connected to the measuring block 1 through the screw hole 11 .

[0039] The screw hole 11 is provided on the bottom surface of the measuring block 1, and the central axis of the screw hole 11 is coaxial with the central axis of the measuring block 1, and the cross section of the screw hole 11 is in a "T" shape. The stud 20 is provided at one end of the handle 2 facing the measuring block 1, and the central axis of the stud 20 is also coaxial with the central axis of the measuring block 1. It is worth noting that the outer diameter of the stud 20 is smaller than the outer diameter of the handle 2, so that the end face of the handle 2 facing the stud 20 is in contact with the top surface of the screw hole 11.

[0040] When in use, the handle 2 changes from a fixed connection to a detachable connection, that is, the stud 20 on the handle 2 is threadedly connected with the screw hole 11 on the measuring block 1, and different measuring heads can be installed through the handle 2 for use, which reduces the manufacturing cost of the gauge.

[0041] Further, such as Figure 3 As shown, a fixing ring 3 is sleeved on the outer wall of the handle 2, and a circular ring 30 is provided at one end of the fixing ring 3 facing the measuring block 1. The circular ring 30 is coaxial with the central axis of the fixing ring 3, and the outer wall of the circular ring 30 is flush with the outer wall of the fixing ring 3, and the inner diameter of the circular ring 30 is equal to the diameter of the measuring block 1 at the lower bottom surface. The height of the circular ring 30 along its own central axis is greater than the height from the upper bottom surface to the lower bottom surface of the measuring block 1, and a protective cover 31 is threadedly connected to the other end of the circular ring 30.

[0042] The inner diameter of the fixing ring 3 is larger than the inner diameter of the circular ring 30, the outer diameter of the fixing ring 3 is equal to the outer diameter of the circular ring 30, and the height of the fixing ring 3 along the central axis of the handle 2 is much smaller than the height of the circular ring 30 along the central axis of the handle 2, so that after the circular ring 30 is threadedly connected with the protective cover 31, a structure with a cavity can be formed between the protective cover 31, the fixing ring 3 and the circular ring 30, and the cavity is not completely closed, so that the handle 2 can enter, so as to protect the measuring block 1.

[0043] When the measuring block 1 is not in use, the protective cover 31 is threadedly connected to the circular ring 30. The structure with a cavity formed by the protective cover 31, the circular ring 30 and the fixing ring 3 closes the measuring block 1, which can prevent the measuring block 1 from being damaged when not in use. When the measuring block 1 needs to be used for measurement, the protective cover 31 is twisted to remove the protective cover 31 from the circular ring 30, and then the circular ring 30 is held to slide the fixing ring 3 along the handle 2 until the fixing ring 3 and the handle 2 are separated, so as to prevent the fixing ring 3 and the circular ring 30 from affecting the measurement of the handle 2 and the measuring block 1.

[0044] Further, such as Figure 4 As shown, a plurality of spring sheets 32 are inclined at one end of the protective cover 31 toward the measuring block 1, and the plurality of spring sheets 32 are distributed in a ring shape along the center point of the protective cover 31, and the extension lines of each spring sheet 32 ​​toward the measuring block 1 intersect at the same point, and a cleaning brush 33 is provided at one end of each spring sheet 32 ​​toward the measuring block 1.

[0045] There are multiple spring sheets 32, which are distributed in a ring shape around the central axis of the protective cover 31 in sequence. Each spring sheet 32 ​​is tilted on the protective cover 31, and each spring sheet 32 ​​is tilted outward along the radial direction of the protective cover 31, that is, each spring sheet 32 ​​and the connection point of the protective cover 31 are connected in sequence, so that a circle with the same area as the upper bottom surface of the measuring block 1 can be formed, and the angle between each spring sheet 32 ​​and the central axis of the protective cover 31 will be smaller than the angle between the element line on the measuring block 1 and its own central axis, that is, when the protective cover 31 is attached to the measuring block 1, the spring sheet 32 ​​will be squeezed on the outer wall of the measuring block 1. The cleaning brush 33 is a soft brush, which can prevent the outer wall of the measuring block 1 from being scratched by the cleaning brush 33 when cleaning the outer wall of the measuring block 1, so as to avoid affecting the measurement of the tapered hole by the measuring block 1.

[0046] During use, after the red lead powder is smeared on the outer wall of the measuring block 1 and the follow-up measurement of the tapered hole is completed, the outer wall of the measuring block 1 needs to be cleaned. At this time, the protective cover 31 can be picked up and the side of the protective cover 31 provided with the spring sheet 32 ​​is placed toward the measuring block 1. During the fitting process, the cleaning brush 33 on each spring sheet 32 ​​will be combined with the outer wall of the measuring block 1, and as the protective cover 31 moves, the cleaning brush 33 located between the spring sheet 32 ​​and the measuring block 1 will gradually be squeezed, thereby causing the spring sheet 32 ​​to be squeezed, and also causing the protective cover 31 to fit with the upper bottom surface of the measuring block 1. After the spring sheet 32 ​​is squeezed, due to the need to restore the deformation, the cleaning brush 33 on the spring sheet 32 ​​will always fit with the outer wall of the measuring block 1, which has a good cleaning effect on the red lead powder on the outer wall of the measuring block 1.

[0047] Further, such as Figure 5 As shown, a first through hole 21 is provided on the free end of the handle 2, and the first through hole 21 extends along the axial direction of the handle 2. A second through hole 22 communicating with the first through hole 21 is provided inside the stud 20. A clamping rod 23 is slidably connected to the handle 2 through the first through hole 21. A clamping rod 24 is provided at one end of the clamping rod 23 close to the stud 20, and a hand-held portion 25 located outside the handle 2 is provided at the other end. A clamping groove 12 located in the screw hole 11 is provided on the measuring block 1, and the clamping groove 12 is adapted to the clamping groove 24.

[0048] The diameter of the first through hole 21 is smaller than the diameter of the second through hole 22 .

[0049] The clamping rod 23 is located inside the first through hole 21 and the second through hole 22. When the card 24 on the clamping rod 23 is matched with the card slot 12 in the screw hole 11, the hand-holding part 25 at the other end of the clamping rod 23 is just flush with the end face of the handle 2. It is worth noting that the hand-holding part 25 is specifically a plate-shaped clamping plate, and an arc groove 26 is provided on the clamping plate to facilitate the finger pressing to take and place the clamping rod 23.

[0050] When in use, hold the handle 2 and align the stud 20 on the handle 2 with the screw hole 11 opened on the measuring block 1 for threaded connection. As the handle 2 rotates, the gasket 4 located at the top of the screw hole 11 will contact the handle 2. As the handle 2 rotates, the stud 20 and the screw hole 11 are completely threadedly connected, and the gasket 4 is squeezed between the handle 2 and the top surface of the screw hole 11 with a "T"-shaped cross-section, thereby improving the connection stability between the stud 20 and the measuring block 1, and avoiding the measurement of the tapered hole of the part 5 being affected due to the unstable connection between the stud 20 and the measuring block 1.

[0051] Further, such as Figure 6 As shown, the measuring block 1 is provided with a gasket 4 located on the screw hole 11 .

[0052] The gasket 4 is a silicone gasket 4 , the maximum inner diameter of the gasket 4 is equal to that of the stud 20 , and a hole is required to be provided in the middle portion of the gasket 4 for the stud 20 to pass through.

[0053] When in use, the gasket 4 is placed on the top of the screw hole 11 with a "T"-shaped cross-section, and the stud 20 on the handle 2 passes through the hole opened on the gasket 4. After passing through the hole, the stud 20 is threadedly connected to the inside of the screw hole 11, and the end of the handle 2 facing the stud 20 will squeeze the gasket 4. The squeezing of the gasket 4 by the handle 2 can strengthen the stability of the connection between the handle 2 and the measuring block 1, and prevent the connection between the handle 2 and the measuring block 1 from being unstable and shaking, thereby affecting the measurement of the tapered hole.

[0054] Further, such as Figure 7 As shown, a knurling pattern 27 is provided on the side wall of the handle 2 .

[0055] When in use, a knurled pattern 27 is provided on the outer wall of the handle 2 . The provision of the knurled pattern 27 improves the anti-slip property of the handle 2 when held by hand, and can improve the controllability of the handle 2 by the staff.

[0056] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. In the absence of conflicts, the embodiments of the present application and the features in the embodiments may be arbitrarily combined with each other. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A gauge for a tapered hole, characterized in that: include: A measuring block, the measuring block is in the shape of a truncated cone, a groove is provided between the side wall and the lower bottom surface of the measuring block, the groove is provided toward the central axis of the measuring block, and the cross section of the groove is a right-angled trapezoid; a handle, the handle is vertically arranged on the lower bottom surface of the measuring block and coaxially arranged with the central axis of the measuring block; wherein a step is provided between the groove surface of the groove and the outer wall of the handle, the groove surface on the groove perpendicular to the central axis of the measuring block is a through end, and the portion of the lower bottom surface of the measuring block that does not intersect with the handle is a stop end.

2. A taper hole gauge according to claim 1, characterized in that: A screw hole with a "T"-shaped cross section is provided on the lower bottom surface of the measuring block, and a stud is provided at one end of the handle connected to the measuring block, and the stud is threadedly connected to the measuring block through the screw hole.

3. A taper hole gauge according to claim 2, characterized in that: A fixing ring is sleeved on the outer wall of the handle, and a circular ring is provided at one end of the fixing ring facing the measuring block. The circular ring is coaxial with the central axis of the fixing ring, the outer wall of the circular ring is flush with the outer wall of the fixing ring, and the inner diameter of the circular ring is equal to the diameter of the measuring block at the lower bottom surface, the height of the circular ring along its own central axis direction is greater than the height from the upper bottom surface to the lower bottom surface of the measuring block, and a protective cover is threadedly connected to the other end of the circular ring.

4. A tapered hole gauge according to claim 3, characterized in that: The protective cover is inclined toward one end of the measuring block and is provided with a plurality of spring sheets, the plurality of spring sheets are distributed in a ring shape along the center point of the protective cover, and the extension lines of each spring sheet toward the measuring block intersect at the same point, and each spring sheet is provided with a cleaning brush at one end toward the measuring block.

5. A taper hole gauge according to claim 4, characterized in that: A first through hole is provided on the free end of the handle, and the first through hole extends along the axial direction of the handle. A second through hole connected to the first through hole is provided inside the stud. The handle is slidably connected with a clamping rod through the first through hole. A card is provided at one end of the clamping rod close to the stud, and a hand-held portion located on the outside of the handle is provided at the other end. A clamping slot is provided on the measuring block and is located in the screw hole, and the clamping slot is adapted to the card. The aperture of the first through hole is smaller than the aperture of the second through hole.

6. A taper hole gauge according to claim 2, characterized in that: The measuring block is provided with a gasket located on the screw hole.

7. A taper hole gauge according to claim 1, characterized in that: The side wall of the handle is provided with knurling patterns.

Images