Device for measuring depth of seam allowance of cylinder hole of cylinder block

Abstract

The utility model relates to the technical field of engine measuring equipment, and discloses an air cylinder body hole spigot depth measuring device which comprises a cross beam, a depth measuring tool is fixedly installed on the cross beam, a measuring head of the depth measuring tool penetrates through the cross beam and extends to the position below the cross beam, and a first sliding groove and a second sliding groove are formed in the bottom face, close to the two ends, of the cross beam in parallel. A top block is slidably arranged in the first sliding groove and connected with the first sliding groove through a spring, the bottom end of the top block extends out of the first sliding groove, a lead screw sliding block structure is arranged at the position of the second sliding groove, the sliding block slides up and down in the second sliding groove, and the bottom end of the sliding block can extend out of the bottom face of the cross beam by a set distance. The bubble type gradienter is arranged in the middle of the top of the cross beam to achieve leveling of the cross beam, spigot depth data measured after the cross beam is leveled eliminate the influence of the uneven surface of the cylinder hole surface on spigot depth measurement, and the measured data are accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of engine measuring equipment, in particular to a cylinder block cylinder bore stop depth measuring device. Background Technology

[0002] The depth of the cylinder bore stop of the engine cylinder block is an important dimension of the cylinder block. If the depth of the cylinder bore stop of the produced cylinder block does not meet the process standard, it will affect the subsequent installation of the steel sleeve, which will cause high water temperature of the whole machine, water backflow, and even cause problems such as cracking of the cylinder liner. Therefore, after the cylinder bore stop processing of the cylinder block is completed, the depth of the cylinder bore stop needs to be manually tested to determine whether the product meets the manufacturing standard. The measurement of the cylinder bore stop depth dimension is generally carried out by means of three-coordinate measuring machines, testing platforms and height gauges, but these testing methods require the cylinder block to be transported away from the production line and sent to the corresponding measuring machine or platform for measurement. The transportation distance is long and troublesome, which is not suitable for batch testing and has low detection efficiency.

[0003] The utility model patent with the authorization announcement number CN216205929U discloses a device for measuring the depth of the spigot. This solution installs a micrometer on a crossbeam. When measuring, the crossbeam is clamped on the cylinder bore surface to measure the depth of the spigot. However, when the cylinder body has an uneven surface due to manufacturing errors, the data of the spigot depth measured by this solution is inaccurate. The measurement method of this solution does not consider the impact of the uneven surface of the cylinder bore on the measurement of the spigot depth, so it has certain limitations. Contents of utility model

[0004] Aiming at the shortcomings of the prior art, the purpose of the utility model is to provide a cylinder block cylinder bore stopper depth measuring device. By setting a bubble level and a lead screw slider structure, the stopper depth data measured after leveling the crossbeam eliminates the influence of the uneven surface of the cylinder bore on the stopper depth measurement, and the measured data is accurate.

[0005] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0006] A cylinder block cylinder bore stop depth measuring device comprises a crossbeam, a depth measuring tool is fixedly mounted on the crossbeam, a measuring head of the depth measuring tool passes through the crossbeam and extends to the bottom of the crossbeam, a first slide groove and a second slide groove are arranged in parallel at the bottom surface of the crossbeam near both ends, a top block is slidably arranged in the first slide groove, the top block and the first slide groove are connected by a spring, the bottom end of the top block extends out of the first slide groove, a lead screw slider structure is arranged at the second slide groove, the slider slides up and down in the second slide groove, and the bottom end of the slider can extend out of the bottom surface of the crossbeam to set a distance; a bubble level is arranged in the middle of the top of the crossbeam.

[0007] As a further implementation, the length direction of the bubble level is the same as that of the cross beam.

[0008] As a further implementation, a clamping member is provided near one end of the top of the cross beam, and a depth measuring tool is fixed by the clamping member. The depth measuring tool uses a micrometer or a dial indicator.

[0009] As a further implementation, the bubble level is arranged at the middle position of the top of the cross beam, and handle mounting points are provided on the cross beam at both ends of the bubble level, and handles are mounted through the handle mounting points.

[0010] As a further implementation, the depths of the first chute and the second chute are both smaller than the thickness of the cross beam, and the height of the top block is greater than the depth of the first chute.

[0011] As a further implementation, the lead screw slider structure includes a lead screw, a nut and a slider. The top end of the lead screw is connected to the nut, and the bottom end passes through the cross beam and extends into the second chute to be in threaded cooperation with the slider. The thread on the lead screw is arranged near the bottom end of the lead screw.

[0012] As a further implementation, the bottom surface of the nut is in contact with the top surface of the cross beam, and a limiting piece is provided on the lead screw. The top surface of the limiting piece abuts against the top surface of the second chute to fix the height position of the lead screw.

[0013] As a further implementation, the bottom end of the lead screw is higher than the bottom surface of the cross beam.

[0014] As a further implementation, both the first chute and the second chute are arranged vertically.

[0015] As a further implementation, the first chute and the second chute form openings on the bottom surface of the cross beam.

[0016] The beneficial effects of the above-mentioned utility model are as follows:

[0017] 1. By arranging a bubble level on the cross beam, the utility model can accurately judge whether the heights of different positions on the cylinder hole surface are flush before measurement. By arranging a lead screw slider structure, the bottom end of the slider can extend out of the bottom surface of the cross beam by a set distance to level the cross beam. The measured data of the stop depth after leveling the cross beam eliminates the influence of the uneven surface of the cylinder hole on the measurement of the stop depth, and the measured data is accurate.

[0018] 2. The lead screw of the utility model is provided with a limiting piece, and the top surface of the limiting piece abuts against the top surface of the second chute to fix the height position of the lead screw, preventing the lead screw from sliding relative to the cross beam and affecting the measurement. Description of the Drawings

[0019] The accompanying drawings of the specification, which form a part of the present utility model, are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation to the present utility model.

[0020] Figure 1 is the overall structure diagram of the cylinder block cylinder hole stop depth measuring device in the embodiment of the present utility model;

[0021] Figure 2 is the axonometric schematic diagram of the cylinder block cylinder hole stop depth measuring device in the embodiment of the present utility model;

[0022] Figure 3 is the sectional structure schematic diagram of the right end of the cross beam in the embodiment of the present utility model.

[0023] In the figure: The distances or dimensions between each part are exaggerated for showing the positions of each part, and the schematic diagram is only for illustration.

[0024] Wherein: 1. calibration body, 11. first comparison block, 12. second comparison block; 2. cross beam, 21. first top block, 22. second top block, 23. through hole, 24. spring, 25. first sliding groove, 26. second sliding groove, 27. nut, 28. limiting piece, 29. lead screw; 3. bubble level, 4. handle, 5. clamping piece, 6. depth measuring tool, 7. measuring head, 8. slider. Detailed implementation manners

[0025] It should be noted that the following detailed descriptions are all illustrative and are intended to provide a further description of the present utility model. Unless otherwise specified, all technical and scientific terms used in the present utility model have the same meanings as those commonly understood by those of ordinary skill in the technical field to which the present utility model belongs.

[0026] As mentioned in the background art, in the prior art, a dial indicator is installed on the cross beam. During measurement, the two ends of the cross beam are clamped on the cylinder hole surface to measure the stop depth of the cylinder hole. However, when the surface of the cylinder hole is uneven due to manufacturing errors of the cylinder block, the data of the stop depth measured by this scheme is inaccurate. The measurement method of this scheme does not consider the influence of the uneven surface of the cylinder hole on the measurement of the stop depth, so there are certain limitations.

[0027] Embodiment 1

[0028] In a typical implementation manner of the present utility model, with reference to Figure 1As shown in the figure, a measuring device for the depth of the counterbore of a cylinder block includes a cross beam 2. A depth measuring tool 6 is fixedly installed on the cross beam 2. The measuring head 7 of the depth measuring tool 6 passes through the cross beam 2 and extends below the cross beam 2. At the bottom surface of the cross beam 2 near both ends, a first sliding groove 25 and a second sliding groove 26 are arranged in parallel. A top block is slidably arranged in the first sliding groove 25, and the top block is connected to the first sliding groove 25 through a spring 24. The bottom end of the slider 8 extends out of the first sliding groove 25. A lead screw slider structure is arranged at the second sliding groove 26, and the slider 8 slides up and down in the second sliding groove 26. The bottom end of the slider can extend out of the bottom surface of the cross beam by a set distance. At the middle position of the top of the cross beam, a bubble level 3 is arranged.

[0029] As Figure 1 shown in the figure, a clamping member 5 is arranged at the top of the cross beam 2 near the left end. A through hole 23 is arranged on the cross beam at the clamping member 5 to facilitate the depth measuring tool 6 to pass through. The depth measuring tool 6 is fixed by the clamping member 5. The depth measuring tool 6 adopts a micrometer or a dial indicator. In this embodiment, a dial indicator is adopted.

[0030] It can be understood that the method of fixing the dial indicator by the cross beam 2 through the clamping member 5 is a prior art. As long as the dial indicator can be clamped to prevent the dial indicator from moving up and down when measuring the depth.

[0031] As Figures 1 - 3 shown in the figure, at the bottom surface of the cross beam 2 near both ends, a first sliding groove 25 and a second sliding groove 26 are arranged in parallel. The bottom ends of the first sliding groove 25 and the second sliding groove 26 extend to the bottom surface of the cross beam to form openings. The top surface of the sliding groove is lower than the bottom surface of the cross beam to facilitate the arrangement of the spring and the limit piece structure. The second sliding groove 26 is located at the end of the cross beam 2, and the first sliding groove 25 is located on one side of the two second sliding grooves 26 away from the end of the cross beam 2. Both the first sliding groove and the second sliding groove 26 are vertically arranged, and the depth of the sliding groove is less than the thickness of the cross beam 2.

[0032] The top block includes a first top block 21 and a second top block 22. The first top block 21 is located in the first sliding groove 25 at the left end of the cross beam, and the second top block 22 is located in the first sliding groove 25 at the right end of the cross beam. The top block is slidably matched with the first sliding groove 25, and the top of the top block is connected to the first sliding groove through a spring 24. In the natural state, the bottom end of the top block extends out of the first sliding groove.

[0033] As Figure 1 shown in the figure, the length direction of the bubble level 3 is the same as the length direction of the cross beam. When the cross beam 2 is pressed on the cylinder hole surface, if the heights of both ends of the cross beam 2 are different, the bubble in the bubble level 3 will not be located in the middle position, but will deflect towards the end of the cross beam 2 with a higher height. Through the setting of the bubble level 3, the height relationship of the cylinder hole surfaces abutted by both ends of the cross beam 2 can be quickly judged.

[0034] The bubble level 3 is provided at the middle position on the top of the cross beam 2. Handle mounting points are provided on the cross beam 2 at both ends of the bubble level 3. The U-shaped handle 4 is installed through the handle mounting points. Through the handle 4, it is convenient to control the cross beam 2.

[0035] The structures of the first top block 21 and the second top block 22 are completely the same. The height of the top block is greater than the depth of the first sliding groove 25. When the cross beam is pressed against the plane through the handle, the spring 24 is completely compressed. At this time, the bottom surface of the top block protrudes from the opening of the first sliding groove at the bottom surface of the cross beam 2, that is, the bottom surface of the top block is lower than the bottom surface of the cross beam 2.

[0036] When measuring the depth of the stop bore, calibration is required. The calibration body 1 is used. The calibration body 1 is also of the cross beam structure and has the same length as the cross beam 2. First comparison blocks 11 and second comparison blocks 12 are respectively provided at the top ends of both ends of the calibration body 1. The top surfaces of the first comparison block 11 and the second comparison block 12 are flat surfaces and have the same height.

[0037] During calibration, the bottom surface of the first top block 21 of the cross beam is abutted against the first comparison block 11, and the bottom surface of the second top block 22 is abutted against the second comparison block 12 through the handle 4. The cross beam 2 is pressed down through the handle 4 so that the spring 24 is completely compressed, and the top block shrinks into the first sliding groove 25 to the maximum extent. After calibrating the micrometer, the next step can be to measure the depth of the stop bore.

[0038] During measurement, the two ends of the cross beam 2 also need to be clamped on the cylinder hole surface through the handle 4. The cross beam 2 should pass through the center of the cylinder hole as much as possible. When the cross beam 2 is pressed tightly, if the heights of the two ends of the cross beam 2 are different, the bubble will shift to the higher end. The prior art does not consider the influence of different cylinder hole surfaces on the measurement of the stop bore depth, and the measured data has no reference value.

[0039] In order to improve the measurement accuracy, the cross beam 2 needs to be leveled. If the handle is lifted by hand to raise the lower end of the cross beam 2, this method is greatly affected by human factors and the human hand will shake. Therefore, a lead screw slider structure is set in this embodiment.

[0040] As Figure 3 shown, the lead screw slider structure includes a lead screw 29, a nut 27 and a slider 8. The top end of the lead screw 29 is connected to the nut 27, and the bottom end passes through the cross beam 2 and extends into the second sliding groove 26 to be in threaded cooperation with the slider 8.

[0041] The cross sections of the slider 8 and the top block are both square, and the cross section of the sliding groove is also correspondingly set to be square, so that the slider 8 and the top block are in sliding fit with the sliding groove.

[0042] As Figure 3As shown, the bottom end of the lead screw 29 is higher than the bottom surface of the cross beam 2, that is, the bottom end of the lead screw 29 does not extend beyond the bottom surface of the cross beam 2. The bottom surface of the nut 27 at the top end of the lead screw 29 contacts the top surface of the cross beam. A through hole needs to be provided in the part of the cross beam 2 above the second chute 26 to facilitate the lead screw to pass through. The thread on the lead screw 29 is arranged near the bottom end of the lead screw 29, and no thread is provided at the mating part of the lead screw 29 and the through hole of the cross beam, ensuring that the lead screw 29 can only rotate itself under the drive of the nut 27 and will not change its relative position with the cross beam 2.

[0043] To prevent the lead screw 29 from being lifted when the slider 8 extends beyond the bottom surface of the cross beam 2, a limiting piece 28 is provided on the circumferential side of the lead screw 29, and the top surface of the limiting piece 28 abuts against the top surface inside the second chute 26 to fix the height position of the lead screw 29.

[0044] Before the test, the slider 8 needs to slide into the second chute 26. The bottom surface of the slider 8 is higher than the bottom surface of the cross beam. When measuring the depth of the stop bore, if the left end of the cross beam 2 is high, at this time the air bubble deflects to the left end of the bubble level 3, and the lead screw slider structure at the right end of the cross beam 2 needs to be adjusted. Rotate the nut 27 to drive the lead screw 29 to rotate, so that the slider 8 extends beyond the bottom surface of the cross beam 2. When the slider 8 extends and the bottom surface of the slider 8 contacts the cylinder bore surface, since the slider 8 is close to the second top block 22, at this time the bottom surfaces of the slider and the second top block 22 are basically flush. Continue to rotate the nut, and the slider will lift the right end of the cross beam. At this time, the distance between the top surface of the second top block 22 and the top surface of the first chute becomes larger, and the spring 24 starts to recover its length. By extending the slider 8, the height of the right end of the cross beam 2 is adjusted to the same height as the left end, leveling the cross beam 2, and then measuring the depth of the stop bore. The measured depth data is more accurate. Using the measuring device of this embodiment for measurement takes into account the influence of the unevenness of the cylinder bore surface on the measurement of the stop bore depth, and overcomes this influence by adjusting the slider 8. The measured stop bore depth is more valuable for reference.

[0045] It can be understood that in other examples, the cross section of the nut is set to be circular, and a pointer is provided on the circumferential side of the nut. A corresponding circle of scales is provided on the surface of the cross beam on the circumferential side of the nut. The cross beam can be pressed against a plane. When the bottom surfaces of the slider and the top block are flush, the pointer indicates the initial scale. After adjustment, the difference between the adjusted scale and the initial scale is the height by which the end of the cross beam is raised. By setting the scale and subsequent calculations, the measured stop bore depth is more accurate.

[0046] It can be understood that the bubble level 3 in this embodiment can be replaced by an inclination sensor. The inclination data of the inclination sensor is connected to a computer through a wire, and the inclination data is displayed on the computer. By adjusting the slider 8, the two ends of the cross beam are leveled, and this method is more accurate.

[0047] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A cylinder block cylinder bore stop depth measuring device, characterized in that: The invention comprises a cross beam (2), on which a depth measuring tool (6) is fixedly mounted, the measuring head of the depth measuring tool (6) passes through the cross beam (2) and extends to the bottom of the cross beam (2), a first slide groove (25) and a second slide groove (26) are arranged in parallel at the bottom surface of the cross beam (2) near both ends, a top block is slidably arranged in the first slide groove (25), the top block and the first slide groove (25) are connected by a spring (24), the bottom end of the top block extends out of the first slide groove (25), a lead screw slider structure is arranged at the second slide groove (26), a slider (8) slides up and down in the second slide groove (26), and the bottom end of the slider (8) can extend out of the bottom surface of the cross beam (2) to set a distance; and a bubble level (3) is arranged at the middle position of the top of the cross beam (2).

2. A cylinder block bore stop depth measuring device according to claim 1, characterized in that: The length direction of the bubble level (3) is in the same direction as the length direction of the crossbeam (2).

3. A cylinder block bore stop depth measuring device according to claim 1, characterized in that: A clamping piece (5) is provided near one end of the top of the crossbeam (2), and a depth measuring tool (6) is fixed by the clamping piece (5). The depth measuring tool (6) is a micrometer or a dial gauge.

4. A cylinder block bore stop depth measuring device according to claim 1, characterized in that: The bubble level (3) is arranged at the middle position of the top of the crossbeam (2), and handle mounting points are arranged on the crossbeam (2) at both ends of the bubble level (3), and the handles (4) are mounted through the handle mounting points.

5. The cylinder block bore stop depth measuring device according to claim 1, characterized in that: The depths of the first slide groove (25) and the second slide groove (26) are both less than the thickness of the crossbeam (2), and the height of the top block is greater than the depth of the first slide groove (25).

6. A cylinder block bore stop depth measuring device according to claim 5, characterized in that: The lead screw slider structure comprises a lead screw (29), a nut (27) and a slider (8); the top end of the lead screw (29) is connected to the nut (27), and the bottom end passes through the cross beam (2) and extends into the second slide groove (26) to cooperate with the slider (8) thread; the thread on the lead screw (29) is arranged near the bottom end of the lead screw (29).

7. A cylinder block bore stop depth measuring device according to claim 6, characterized in that: The bottom surface of the nut (27) contacts the top surface of the crossbeam (2), and a limiting plate (28) is provided on the lead screw (29). The top surface of the limiting plate (28) abuts against the top surface of the second slide groove (26) to fix the height position of the lead screw (29).

8. The cylinder block bore stop depth measuring device according to claim 6, characterized in that: The bottom end of the lead screw (29) is higher than the bottom surface of the crossbeam (2).

9. The cylinder block bore stop depth measuring device according to claim 1, characterized in that: The first sliding groove (25) and the second sliding groove (26) are both arranged vertically.

10. A cylinder block bore stop depth measuring device according to claim 9, characterized in that: The first sliding groove (25) and the second sliding groove (26) form openings on the bottom surface of the crossbeam (2).

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