An apparatus for detecting the depth of a cross-arc surface and a method for using the same

Abstract

The present invention discloses a device for detecting the depth of a cross-arc surface, comprising a dial indicator, a positioning base, a gauge body, a slider and a gauge block, a top surface of the positioning base is provided with a clearance notch on the left side, a gauge body is provided on the top of the positioning base, a rectangular opening is provided on the left side of the bottom surface of the gauge body, a travel slot is provided on the top surface of the rectangular opening, a slider is provided in the rectangular opening on the left side of the bottom surface of the gauge body, a contact block is provided on the top surface of the slider, the contact block extends upward from the travel slot, a gauge block is provided on the bottom surface of the slider, a measuring end is provided at the bottom of the gauge block, a guiding structure for guiding the slider to move left and right is provided on the slider, a clamping seat is provided on the top surface of the gauge body, a through hole is provided on the right end surface of the clamping seat, and a dial indicator is provided in the through hole on the right end surface of the clamping seat. When detecting the depth of the cross-arc surface, the present invention is easy to use, the acquired parameters are accurate, and meet the corresponding process requirements; it is very convenient in obtaining reference points and measuring the cross-arc surface, and improves work efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of engine inspection tools, and particularly relates to a cross-arc surface depth detection device and a using method thereof. Background Art

[0002] In the machinery industry, especially in the manufacturing process of the engine industry, since the whole is a precision device, the assembly position is often detected to verify whether the parameter meets the process requirements. Among them, a keyway groove is provided at the main shaft hole of the engine cylinder block for positioning the bearing shell. Therefore, the depth of the keyway groove is an important parameter for measuring the looseness of the bearing shell. Since the main shaft hole is arc-shaped and the keyway groove is also arc-shaped, the two surfaces of the main shaft hole and the keyway groove form a cross-arc surface. That is, from the cross-sectional view of the main shaft hole, the arc edge of the main shaft hole and the arc edge of the keyway groove intersect. At present, the depth of the cross-arc surface is generally measured by inserting one end of a depth vernier caliper into the keyway groove. However, due to the structural characteristics of the depth vernier caliper, it is used in a hole cavity with straightness, while for the cross-arc surface, not only the measured surface is arc-shaped, but also its reference surface is arc-shaped. Using a depth vernier caliper for measurement has a large error and is not suitable for measurement scenarios with high precision requirements. If the detected error exceeds the process requirement range, it will affect the subsequent assembly work. The cylinder block that does not meet the process requirements needs to be reworked, which affects the work efficiency. Summary of the Invention

[0003] The purpose of the present invention is to provide a cross-arc surface depth detection device and a using method thereof, so as to solve the problems that there are large measurement errors in the detection of the cross-arc edge / surface formed by the arc edge of the main shaft hole and the keyway groove, and it is not suitable for measurement scenarios with high precision requirements; if the detected error exceeds the process requirement range, it will affect the subsequent assembly work, and the cylinder block that does not meet the process requirements needs to be reworked, affecting the work efficiency, etc.

[0004] To solve the above technical problems, the present application adopts the following technical solutions:

[0005] A cross-arc surface depth detection device includes a dial indicator, a positioning base, a gauge body, a slider and a gauge block. A relief notch is provided on the left side of the top surface of the positioning base. A gauge body is provided on the top of the positioning base. A rectangular opening is provided on the left side of the bottom surface of the gauge body. A travel through groove is provided on the top surface of the rectangular opening. A slider is provided in the rectangular opening on the left side of the bottom surface of the gauge body. A contact block is provided on the top surface of the slider. The contact block extends upward from the travel through groove. A gauge block is provided on the bottom surface of the slider. A measuring end is provided at the bottom of the gauge block. A guiding structure for guiding the left and right movement of the slider is provided on the slider. A dial indicator holder is provided on the top surface of the gauge body. A through hole is provided on the right end surface of the dial indicator holder. A dial indicator is provided in the through hole on the right end surface of the dial indicator holder.

[0006] Furthermore, the bottom surface of the positioning base is provided with a plurality of stepped through holes, the bottom surface of the gauge body is provided with a plurality of threaded holes, the plurality of stepped through holes and threaded holes are coaxially distributed one by one, and fixing bolts are provided in the coaxially distributed stepped through holes and threaded holes.

[0007] Furthermore, the measuring end is a semicircular metal sheet, the top surface of which is a plane and is welded to the lower left corner of the gauge block, the bottom surface of which is an arc surface, and the measuring end is placed in a clearance notch on the left side of the top surface of the positioning base.

[0008] Furthermore, the slider and the gauge block are connected by welding or bolting.

[0009] Furthermore, the guiding structure includes a reset spring and a guide rod, the right end face of the slider is provided with a stepped through hole, the left end face and the right end face of the rectangular opening are respectively provided with coaxial circular holes, guide rods are provided in the circular holes of the left end face and the right end face of the rectangular opening, the slider is sleeved on the guide rod through its own stepped through hole, and the guide rod is provided with a reset spring.

[0010] Furthermore, the guide structure is provided in two groups, and the stepped through hole on the right end surface of the slider and the left end surface and the right end surface of the rectangular opening are respectively provided with two groups of coaxial circular holes.

[0011] Furthermore, a guide pin is provided at the middle of the left end surface of the sliding block, an axial hole is opened at the middle of the left end surface of the rectangular opening, and the guide pin is placed in the axial hole.

[0012] Furthermore, the meter clamp body is a rectangular metal block, the top surface of the meter clamp is provided with a threaded through hole that penetrates to the top surface of the through hole provided on the right end surface of the meter clamp, and a dial indicator fixing bolt is provided in the threaded through hole on the top surface of the meter clamp.

[0013] Furthermore, the dial indicator is a pointer dial indicator or a digital dial indicator.

[0014] A method for using a cross arc surface depth detection device comprises the following steps:

[0015] Step 1: Place the positioning base in the arc surface of the spindle hole, so that the bottoms of the left and right ends of the gauge body are placed on the separated surfaces at both ends of the spindle hole, and the measuring ends of the positioning base and the gauge block fit the arc surface of the spindle hole. The gauge block and the slider are blocked and limited by the arc surface of the spindle hole. When the positioning base is placed downward, the gauge block and the slider will move to the right until the positioning base stops moving downward;

[0016] Step 2: When the gauge block and the slider move to the right, the right end face of the contact block on the slider will push against the tip of the dial indicator, and the value on the tip will change. At this time, zero the value on the dial indicator. After zeroing, place the positioning base at this position as the reference point, that is, the zero point.

[0017] Step 3: Move the whole device longitudinally towards the chuck groove. When the measuring end of the gauge block passes through the chuck groove, the measuring end of the gauge block is displaced by the depression at the chuck groove, so that the measuring end is placed inside the chuck groove. At the same time, the return spring will push the slider and the two blocks to the left because there is no resistance until they contact the cross arc surface and then stop moving. At this time, the value on the dial indicator changes due to the movement of the gauge block. When the value on the dial indicator is a fixed value, the reading on the dial indicator is the depth of the cross arc surface.

[0018] The beneficial effects achieved by the present invention are:

[0019] The key point of the present invention is to propose a novel measurement method for the depth of the cross arc surface that is not suitable for measurement with a vernier caliper or a depth vernier caliper. When this device detects the depth of the cross arc surface, it is convenient to use, the obtained parameters are accurate, and it meets the corresponding process requirements; at the same time, due to the elastic force of the return spring, it is very convenient in both the acquisition of the reference point and the measurement of the cross arc surface; it reduces the number of rework due to inaccurate detection and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In the drawings:

[0021] Figure 1 is a schematic diagram of the cross arc surface on the existing engine main shaft hole;

[0022] Figure 2 is the front view of the present invention;

[0023] Figure 3 is the top view of the present invention;

[0024] Figure 4 is Figure 3 the sectional view taken along A-A in

[0025] Figure 5 is Figure 3 the sectional view taken along B-B in

[0026] Figure 6 is the three-dimensional schematic diagram of the present invention.

[0027] Reference numerals: 1, positioning block; 2, gauge body; 3, dial indicator; 4, dial indicator holder; 5, slider; 5-1, contact block; 5-2, guiding pin shaft; 6, gauge block; 7, return spring; 8, guide rod; 9, dial indicator fixing bolt; 10, fixing bolt; 11, positioning pin. DETAILED DESCRIPTION OF THE INVENTION

[0028] The following will be specifically described in conjunction with specific embodiments.

[0029] The present invention will be further described in detail below in conjunction with specific implementation manners. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope of the present invention and its applications.

[0030] As Figures 1-6 shown, a cross-arc surface depth detection device includes a dial indicator 3, a positioning base 1, a gauge body 2, a slider 5, and a gauge block 6. The left and right end faces of the positioning base 1 are arc-shaped, facilitating the positioning base 1 to be placed on the arc surface of the spindle hole. A relief notch is provided on the left side of the top surface of the positioning base 1. A gauge body 2 is provided on the top of the positioning base 1. A number of stepped through-holes are provided on the bottom surface of the positioning base 1, and a number of threaded holes are provided on the bottom surface of the gauge body 2. The stepped through-holes and the threaded holes are coaxially distributed one by one, and fixing bolts 10 are provided in the coaxially distributed stepped through-holes and threaded holes.

[0031] A rectangular opening facing downward is provided on the left side of the bottom surface of the gauge body 2. A travel through-slot is provided on the top surface of the rectangular opening. A slider 5 is provided in the rectangular opening on the left side of the bottom surface of the gauge body 2. A contact block 5-1 is provided on the top surface of the slider 5, and the contact block 5-1 extends upward from the travel through-slot. A gauge block 6 is provided on the bottom surface of the slider 5. A measuring end is provided at the bottom of the gauge block 6. The measuring end is a semi-circular metal sheet, the top surface thereof is a plane, and it is welded to the lower left corner of the gauge block 5. The bottom surface of the measuring end is an arc surface, and the measuring end is placed in the relief notch on the left side of the top surface of the positioning base 1. The connection mode between the slider 5 and the gauge block 6 is welding or bolt connection. In this solution, bolt connection is preferably used to facilitate the replacement of the gauge block 6.

[0032] A guiding structure for guiding the left and right movement of the slider 5 is provided on the slider 5. The guiding structure includes a return spring 7 and a guide rod 8. A stepped through-hole is provided on the right end surface of the slider 5. Coaxial round holes are respectively provided on the left end surface and the right end surface of the rectangular opening on the gauge body 2. A guide rod 8 is provided in the round holes on the left end surface and the right end surface of the rectangular opening. The slider 5 is sleeved on the guide rod 8 through its own stepped through-hole. A return spring 7 is provided on the guide rod 8. The guiding structure is in two groups. The stepped through-hole on the right end surface of the slider 5 and the round holes on the left end surface and the right end surface of the rectangular opening are also in two groups, so as to ensure that the slider 5 will not rotate and maintain balance when moving; a guiding pin shaft 5-2 is provided at the middle position of the left end surface of the slider 5, and a shaft hole is provided at the middle of the left end surface of the rectangular opening, and the guiding pin shaft 5-2 is placed in the shaft hole.

[0033] The top surface of the gauge body 2 is provided with a dial gauge holder 4. A through hole is provided on the right end surface of the dial gauge holder 4. A dial indicator 3 is arranged in the through hole on the right end surface of the dial gauge holder 4. The dial indicator 3 is a pointer dial indicator or a digital display dial indicator. In this solution, a digital display dial indicator is preferably used. The body of the dial gauge holder 4 is a rectangular metal block. A threaded through hole is provided on the top surface of the dial gauge holder 4, which penetrates through to the top surface of the through hole provided on the right end surface of the dial gauge holder 4. A dial indicator fixing bolt 9 is arranged in the threaded through hole on the top surface of the dial gauge holder 4.

[0034] Usage method: After assembling this detection device, place the positioning base 1 into the arc surface of the main shaft hole. At this time, the bottoms of the left and right ends of the gauge body 2 are placed on the split surfaces at both ends of the main shaft hole. The measuring ends of the positioning base 1 and the gauge block 6 are in contact with the arc surface of the main shaft hole. At this time, the gauge block 6 and the slider 5 will be blocked by the arc surface of the main shaft hole and move a certain distance to the right. The contact block 5-1 on the slider 5 will push against the thimble of the dial indicator 3, and the value on the dial indicator 3 will change. At this time, it is necessary to zero the value on the dial indicator 3. After zeroing the value, take this position as the reference point, that is, the zero point; then move the whole device longitudinally towards the chuck groove to measure its cross arc surface. When the measuring end of the gauge block 6 is placed at the chuck groove, since there is no object blocking the measuring end of the gauge block 6, the return spring 7 will push the slider 5 and the gauge block 6 together to the left until they stop moving when they come into contact with the cross arc surface. At this time, the value on the dial indicator 3 will also change due to the movement of the gauge block 6. At this time, the reading of this dial on the dial indicator 3 is the depth dimension of the cross arc surface.

[0035] This device can be designed with positioning bases 1 and gauge blocks 6 of different sizes to meet the measurement of the depth of the cross arc surface of different reference arc surfaces.

Claims

1. A cross-arc surface depth detection device, comprising a dial indicator, characterized in that: It also includes a positioning base, a gauge body, a slider and a gauge block. A relief notch is provided on the left side of the top surface of the positioning base. A gauge body is provided on the top of the positioning base. A rectangular opening is provided on the left side of the bottom surface of the gauge body. A travel through slot is provided on the top surface of the rectangular opening. A slider is provided in the rectangular opening on the left side of the bottom surface of the gauge body. A contact block is provided on the top surface of the slider. The contact block extends upward from the travel through slot. A gauge block is provided on the bottom surface of the slider. A measuring end is provided at the bottom of the gauge block. A guiding structure for guiding the left - right movement of the slider is provided on the slider. A dial indicator holder is provided on the top surface of the gauge body. A through hole is provided on the right end surface of the dial indicator holder. A dial indicator is provided in the through hole on the right end surface of the dial indicator holder.

2. The cross-arc surface depth detection device according to claim 1, wherein: A number of stepped through holes are provided on the bottom surface of the positioning base. A number of threaded holes are provided on the bottom surface of the gauge body. The stepped through holes and the threaded holes are coaxially distributed one by one. A fixing bolt is provided in the coaxially distributed stepped through holes and threaded holes.

3. The cross-arc surface depth detection device according to claim 1, characterized in that: The measuring end is a semi - circular metal sheet. Its top surface is flat and is welded to the lower left corner of the gauge block. The bottom surface of the measuring end is an arc surface. The measuring end is placed in the relief notch on the left side of the top surface of the positioning base.

4. The cross-arc surface depth detection device according to claim 1, characterized in that: The connection mode between the slider and the gauge block is welding or bolt connection.

5. The cross-arc surface depth detection device according to claim 1, wherein: The guiding structure includes a return spring and a guide rod. A stepped through hole is provided on the right end surface of the slider. Coaxial round holes are respectively provided on the left end surface and the right end surface of the rectangular opening. The guide rod is provided in the round holes on the left end surface and the right end surface of the rectangular opening. The slider is sleeved on the guide rod through its own stepped through hole. The return spring is provided on the guide rod.

6. The cross-arc surface depth detection device according to claim 5, characterized in that: There are two groups of the guiding structures. The stepped through holes on the right end surface of the slider and the coaxial round holes on the left end surface and the right end surface of the rectangular opening are also two groups.

7. The cross-arc surface depth detection device according to claim 1, wherein: A guiding pin shaft is provided at the middle position of the left end surface of the slider. A shaft hole is provided at the middle of the left end surface of the rectangular opening. The guiding pin shaft is placed in the shaft hole.

8. The cross-arc surface depth detection device according to claim 1, characterized in that: The dial indicator holder body is a rectangular metal block. A threaded through hole is provided on the top surface of the dial indicator holder, penetrating through to the top surface of the through hole provided on the right end surface of the dial indicator holder. A dial indicator fixing bolt is provided in the threaded through hole on the top surface of the dial indicator holder.

9. The cross-arc surface depth detection device according to claim 1, wherein: The dial indicator is a pointer dial indicator or a digital display dial indicator.

10. A method for using the cross-arc surface depth detection device according to any one of claims 1-9, characterized in that: It includes the following steps: Step 1: Place the positioning base in the arc surface of the main shaft hole, so that the bottoms at both ends of the gauge body are placed on the parting surfaces at both ends of the main shaft hole. The measuring ends of the positioning base and the gauge block are in contact with the arc surface of the main shaft hole. The gauge block and the slider are blocked and limited by the arc surface of the main shaft hole. When the positioning base is placed downward, the gauge block and the slider will move to the right until the positioning base stops moving downward. Step 2: When the gauge block and the slider move to the right, the right end surface of the contact block on the slider will push against the tip of the dial indicator, and the value on the tip will change. At this time, zero the value on the dial indicator. After zeroing, take the position where the positioning base is placed here as the reference point, that is, the zero point. Step 3: Move the whole device longitudinally towards the slip groove. When the measuring end of the gauge block passes through the slip groove, the measuring end of the gauge block is displaced by the depression at the slip groove, allowing the measuring end to be placed inside the slip groove. At the same time, since there is no resistance, the return spring will push the slider and the two blocks to the left until they contact the cross arc surface and then stop moving. At this time, the value on the dial indicator changes due to the movement of the gauge block. When the value on the dial indicator is a fixed value, the reading on the dial indicator is the depth of the cross arc surface.

Images