A height detection device and a method of using the same
By designing a height detection device including columns, detection rods and pins, the problems of slow speed and low accuracy of traditional detection methods are solved, and fast and accurate cylinder height detection is achieved, which is suitable for low-cost online inspection in the workshop.
Patent Information
- Application Number
- CN201910559735.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2019-06-26
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2039-06-26
AI Technical Summary
The traditional engine cylinder height detection method is slow, has low accuracy, is complex in operation and is not suitable for factory-based large-scale online inspection. The high-precision three-coordinate detector equipment is costly and has high operating requirements, making it difficult to conduct real-time inspections in the workshop.
A height detection device is designed, including a detection platform, a positioning mechanism and a detection mechanism. Using a combined structure of columns, detection rods, latches and positioning rods, the reference surface to the processing surface is directly judged by adjusting the position of the positioning rod and the coordination of the latch. Whether the height of the test is in compliance with the specifications simplifies the detection process.
It realizes fast, accurate, simple to operate and low-cost high-level inspection, and is suitable for on-site online inspection in the workshop, improving detection efficiency and safety.
Smart Images
Figure CN110118517B_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the field of engines, and in particular relates to a height detection device. Background Art
[0002] When processing the engine cylinder block, it is necessary to detect the height between the reference surface and the processing surface. The traditional marking detection method is as follows: (1) Detect the height from the reference surface 101 to the processing surface 102. Support the cylinder block 1 horizontally on three reference blocks (201, 202, 203) on the detection platform 3. The height difference of the three reference blocks (201, 202, 203) is consistent with the height difference between the reference surfaces they contact. Use a height gauge to draw a horizontal line A on the end face of the cylinder block 1; (2) Turn over the cylinder block 1 with the top face of the cylinder block 1 facing upward. And use four tops (401, 402, 403, 404) to support the bottom surface of the cylinder body 1, adjust the height of the tops (401, 402, 403, 404) so that the end surface horizontal line A of the cylinder body 1 is aligned with the angle ruler on the detection platform 3, so as to adjust the verticality and horizontality of the cylinder body 1 to the right position; (3) Use a height gauge to measure the height of the reference surface 101 and the processing surface 102 of the cylinder body 1 respectively, and the height from the reference surface 101 to the processing surface 102 can be obtained by conversion, and the data can be compared with the upper and lower limits of the size specification to determine whether it is out of tolerance. The traditional method has slow detection speed, low accuracy, low work efficiency, and is not suitable for factory-based large-scale online detection.
[0003] Another detection method is to use a high-precision three-coordinate measuring instrument, but the equipment purchase cost is high, the operating ability and working environment requirements of the staff are high, and the detection speed is slow. It is impossible to detect every engine cylinder block on site in the workshop. Summary of the invention
[0004] The purpose of the present invention is to design a height detection device to address the shortcomings of traditional marking methods. During the detection process, there is no need to adjust the direction, angle and position of the cylinder body to detect whether the height size of the cylinder body meets the product requirements. It has the advantages of being fast, accurate, with small operating errors and safe.
[0005] The present invention solves the problem by adopting the following technical solution: a height detection device for detecting the height dimension of an engine cylinder block, comprising a detection platform, a positioning mechanism and a detection mechanism, characterized in that: the detection mechanism comprises a base and at least one detection unit, the detection unit comprises a column, a detection rod, a latch and a positioning rod, one end of the column is connected to the base, and the other end is connected to the detection rod, the first end of the positioning rod is connected to the base, the detection rod is provided with a pin hole for placing the latch, the pin hole cooperates with the latch, an L-shaped notch is provided on the side of the head of the latch, the distance from the second end of the positioning rod to the side of the latch and the distance from the vertical plane of the L-shaped notch are respectively the height limit values, and the width of the L-shaped notch is the tolerance.
[0006] The method of using the present invention is as follows: (1) Place the cylinder body horizontally on the detection platform and use the positioning device to position the cylinder body, thereby adjusting the verticality and horizontality of the cylinder body; (2) Adjust the distance from the second end of the positioning rod to the side of the pin, so that the distance from the second end of the positioning rod to the side of the pin and the distance from the vertical surface of the L-shaped notch are respectively the limit values of the height to be measured; (3) Push the detection device into the cylinder body and place the end face of the positioning rod against the reference surface; (4) Put the pin into the pin hole and observe whether the processed surface is within the L-shaped notch range of the pin head. If it is within the notch range, it means that the height from the reference surface to the processed surface is qualified, otherwise it is unqualified.
[0007] The detection rod is provided with more than two pin holes and corresponding plugs. Taking the same reference plane as the positioning reference, when detecting whether the height between several processing surfaces and the reference plane is qualified, the end face of the positioning rod is attached to the reference plane, and the plug of the corresponding size is pressed to observe whether the processing surface falls into the L-shaped notch of the plug, so that the height between the reference plane and the processing surface can be intuitively judged whether it is qualified.
[0008] The detection rod is provided with more than two detection arms, and the detection arms are provided with a plurality of pin holes and corresponding plugs. The function of this structural design is as follows: taking the same reference plane as the positioning reference, when the points to be measured on the two processing surfaces are not in a straight line with the positioning points of the reference plane, the end face of the positioning rod is fitted to the reference plane, and two plugs of corresponding sizes are pressed respectively to observe whether the two processing surfaces fall into the L-shaped notches of the corresponding two plugs, so as to intuitively judge whether the height between the reference plane and the processing surface is qualified.
[0009] The column and the base are connected by means of a limit block, a pressure block and bolts. This installation structure is convenient for the later replacement of the detection arm and the column. The limit block can ensure a safe distance between the lower edge of the pin and the surface of the cylinder body when the detection arm and the column are assembled for the first time or replaced later.
[0010] The positioning rod is connected to the base by means of a limit block, a pressure block and bolts. This installation structure facilitates the replacement of the end face of the positioning rod after wear. The limit block can ensure the position size of the end face of the positioning rod and the cylinder body reference surface during the first assembly or subsequent replacement of the positioning rod.
[0011] The detection unit also includes a spring for supporting the latch. The spring has the following functions: (1) fixes the latch on the detection rod, eliminating the need for unnecessary plugging and unplugging of the latch during the detection process; (2) prevents the head of the latch from contacting the cylinder when the detection device is pushed into the cylinder, thereby ensuring a safe distance between the head of the latch and the cylinder.
[0012] The positioning device comprises a plurality of reference blocks, the height difference of the plurality of reference blocks is the same as the height difference of the cylinder body reference surface, and the plurality of reference blocks fit the cylinder body reference surface so that the cylinder body is in a horizontal position.
[0013] The positioning device further comprises at least one pair of L-shaped guide blocks, and the L-shaped guide blocks are in contact with two adjacent surfaces of the cylinder body. The L-shaped guide blocks can prevent the cylinder body from moving during the detection process, thereby affecting the detection result.
[0014] The beneficial effects of the present invention are: (1) the detection device of the present invention has a simple structure and is easy to operate; (2) by observing whether the processed surface falls within the L-shaped notch of the latch, it is possible to intuitively determine whether the height to be measured is qualified. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the height dimension from the reference surface to the processing surface;
[0016] Figure 2 It is a schematic diagram of the first step of the traditional line detection method;
[0017] Figure 3 It is a schematic diagram of the second step of the traditional line detection method;
[0018] Figure 4 A schematic diagram of a detection mechanism of a height detection device according to an embodiment of the present invention;
[0019] Figure 5 It is a schematic diagram of the positioning state of the cylinder body;
[0020] Figure 6 This is a schematic diagram of the distance between the end face of the positioning rod and the side face of the latch head and the vertical face of the L-shaped notch;
[0021] Figure 7 It is a schematic diagram of the relative position state between the detection mechanism and the cylinder body;
[0022] Figure 8 for Figure 7 A partial schematic diagram of
[0023] Fig. 9 for Figure 7 A top view of
[0024] Fig.10 for Fig. 9 Middle F1-F1 section;
[0025] Fig.11 for Figure 8 Middle F2-F2 section;
[0026] Fig.12 It is a schematic diagram of the detection status;
[0027] Fig.13 It is a schematic diagram of the detection status;
[0028] In the accompanying drawings, 1 is a cylinder body; 101 is a reference surface; 102 is a machining surface; 103 is a machining surface; 104 is a machining surface; 105 is a machining surface; 106 is a machining surface; 201 is a reference block; 202 is a reference block; 203 is a reference block; 3 is a detection platform; 401 is a top; 402 is a top; 403 is a top; 404 is a top; 5 is a base; 6 is a column; 7 is a positioning rod; 8 is a detection rod; 801 is a pin; 802 is a pin; 803 is a notch; 804 is a notch; 805 is a spring; 806 is a spring; 9 is a pressure block; 10 is a limit block; 11 is a pressure block; 1201 is a guide block; 1202 is a guide block. DETAILED DESCRIPTION
[0029] See also Figure 4 The height detection device includes a detection platform 3, a positioning mechanism and a detection mechanism, and the detection mechanism includes a base 5 and two detection units. The first detection unit includes a column 6, a positioning rod 7, and a detection rod 8. The detection rod 8 is a single-arm structure. The detection rod 8 is provided with latches 801 and 802. Springs 805 and 806 are used to support the latches 801 and 802 respectively. The second detection unit includes a column 6', a positioning rod 7', and a detection rod 8'. The detection rod 8' is a double-arm structure. The detection rod 8' is provided with latches 801' and 802'. Springs 805' and 806' are used to support the latches 801' and 802' respectively. The head sides of the latches (801, 802, 801', 802') are respectively provided with L-shaped notches (803, 804, 803', 804'). The uprights (6, 6') are fixed to the base 5 respectively through pressing blocks (9, 9'), limiting blocks (10, 10') and bolts, and the positioning rods (7, 7') are fixed to the base 5 respectively through pressing blocks (11, 11'), limiting blocks (10, 10') and bolts.
[0030] The positioning mechanism includes reference blocks 201 , 202 , 203 and L-shaped guide blocks 1201 , 1202 .
[0031] The positioning method of this embodiment is as follows: the cylinder body 1 is horizontally placed on the reference blocks 201, 202, and 203, and the three reference blocks are all fitted with the cylinder body 1, and the height difference of the three reference blocks is the same as the height difference of the reference surface they contact; the L-shaped guide blocks (1201, 1202) are fitted with the cylinder body 1, as shown in FIG. Figure 5 shown.
[0032] See also Figure 6 , the qualified dimensions from the reference surface 101 to the processing surface 102 and the qualified dimensions from the reference surface 104 to the processing surface 105 are 122-122.5 mm; the qualified dimensions from the reference surface 101 to the processing surface 103 and the qualified dimensions from the reference surface 104 to the processing surface 106 are 211.2-211.8 mm. Push the detection mechanism toward the cylinder body 1 so that the positioning rods (7, 7') are respectively in contact with the reference surfaces 101 and 104 (see Figure 7 , Figure 8 and Fig. 9 ).
[0033] Check whether the distance from the reference surface 101 to the processing surface 102 and the processing surface 103 is qualified. The detection method is as follows: the widths of the notch 803 and the notch 804 are designed to be 0.5 mm and 0.6 mm respectively, and the distance from the end face of the positioning rod 7 to the side of the latch 801 is adjusted to 122 mm (i.e., the lower limit of the height from the reference surface 101 to the processing surface 102), and the distance to the side of the latch 802 is adjusted to 211.2 mm (i.e., the lower limit of the height from the reference surface 101 to the processing surface 103); the end face of the positioning rod 7 is attached to the reference surface 101, the latches 801 and 802 are pressed down, and it is observed whether the processing surface 102 and the processing surface 103 fall within the range of the notch 803 and the notch 804 respectively. If yes, it is qualified, otherwise it is unqualified (see Fig.10 and Fig.12 ).
[0034] Check whether the distance from the reference surface 104 to the processing surface 105 and the processing surface 106 is qualified. The detection method is as follows: the widths of the notch 803' and the notch 804' are designed to be 0.5mm and 0.6mm respectively, and the distance from the end face of the positioning rod 7' to the side of the latch 801' is adjusted to 122mm (i.e., the lower limit of the height from the reference surface 104 to the processing surface 105), and the distance to the side of the latch 802' is adjusted to 211.2mm (i.e., the lower limit of the height from the reference surface 104 to the processing surface 106); the end face of the positioning rod 7' is attached to the reference surface 104, the latches 801' and 802' are pressed, and it is observed whether the processing surface 105 and the processing surface 106 fall within the range of the notch 803' and the notch 804' respectively. If yes, it is qualified, otherwise it is unqualified (see Fig.11 and Fig.13 ).
[0035] The present invention is suitable for providing a method and method for detecting cylinder body dimensions online, quickly, accurately, with small operation error, safely and at low cost by using a checking fixture in a foundry workshop.
[0036] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent transformation made by using the contents of the present invention and the drawings, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.
Claims
1. A height detection device for detecting the height dimension of an engine cylinder, comprising a detection platform, a positioning mechanism and a detection mechanism, characterized in that: The detection mechanism includes a base and at least one detection unit, the detection unit includes a column, a detection rod, a latch and a positioning rod, one end of the column is connected to the base, and the other end is connected to the detection rod, the first end of the positioning rod is connected to the base, the detection rod is provided with a pin hole for placing the latch, the pin hole is matched with the latch, an L-shaped notch is provided on the side of the head of the latch, the distance from the second end of the positioning rod to the side of the latch and the distance from the vertical surface of the L-shaped notch are respectively the limit values of the height, and the width of the L-shaped notch is the tolerance; The positioning mechanism includes a plurality of reference blocks and at least one pair of L-shaped guide blocks; the height difference of the plurality of reference blocks is the same as the height difference of the cylinder reference surface, and the plurality of reference blocks fit with the cylinder reference surface so that the cylinder is in a horizontal position; the L-shaped guide block fits with two adjacent surfaces of the cylinder, and the L-shaped guide block can prevent the cylinder from moving during the detection process.
2. The height detection device according to claim 1, characterized in that: The detection rod is provided with more than two pin holes and corresponding latch pins.
3. The height detection device according to claim 1, characterized in that: The detection rod is provided with more than two detection arms, and the detection arms are provided with a plurality of pin holes and corresponding latch pins.
4. The height detection device according to claim 1, characterized in that: The column and the base are connected via a limit block, a pressure block and bolts.
5. The height detection device according to claim 1, characterized in that: The positioning rod is connected to the base through a limit block, a pressure block and bolts.
6. The height detection device according to claim 1, characterized in that: The detection unit further includes a spring for supporting the latch.
7. The method for using the height detection device according to any one of claims 1 to 6, characterized in that: The method comprises the following steps: (1) placing the cylinder body horizontally on a detection platform, and positioning the cylinder body with a positioning device, thereby adjusting the verticality and horizontality of the cylinder body; (2) adjusting the distance from the second end of the positioning rod to the side of the latch pin, so that the distance from the second end of the positioning rod to the side of the latch pin and the distance from the vertical surface of the L-shaped notch are respectively the height limit values; (3) pushing the detection device into the cylinder body, and placing the end face of the positioning rod against the reference surface; (4) placing the latch pin into the pin hole, and observing whether the machined surface is within the L-shaped notch range of the latch pin head. If it is within the notch range, it means that the height from the reference surface to the machined surface is qualified, otherwise it is unqualified.