Diesel engine piston multifunctional parameter measuring device

Abstract

The invention relates to the technical field of piston detection, in particular to a diesel engine piston multifunctional parameter measuring device which comprises a U-shaped frame, a supporting plate with the middle protruding is rotationally installed below the U-shaped frame, the upper portion of the middle of the supporting plate is rotationally connected with the U-shaped frame through a plane bearing, and supporting blocks are fixedly installed at the two ends of the supporting plate. A connecting column is fixedly installed below each supporting block and used for being connected with the upper portion of a piston. The two mounting plates are arranged at the two ends of the U-shaped frame respectively, and each mounting plate is provided with a detection piece used for detecting the size of the peripheral face of the piston; according to the method, the surface size of each position of the outer surface of the piston can be clearly and accurately known, and the abrasion loss of each side of the surface of the piston can be more accurately known.

Description

Technical Field

[0001] This invention relates to the field of piston testing technology, and more specifically to a multi-functional parameter measuring device for diesel engine pistons. Background Technology

[0002] Marine diesel engines are generally large in size, and the piston is one of the main components of the diesel engine. Since the piston is usually under high temperature and high pressure during operation, the failure rate of the piston is also relatively high. Regular inspection and maintenance of the piston are required. The dimensional accuracy and wear condition of the piston head of marine diesel engines are crucial to the performance and life of the engine.

[0003] Typically, when testing the diameter of a piston, the disassembled diesel engine piston head is placed on a testing platform. Then, the operator uses measuring tools to clamp the piston head on both sides of its outer circumference and reads the data. During the measurement process, the operator needs to continuously adjust the rotation angle of the piston head and measure the diameter of the piston head at multiple positions. However, this measurement method can only reflect the overall wear of the piston head circumference and cannot accurately reflect the wear on a specific side of the piston head. Summary of the Invention

[0004] Technical problems to be solved In view of the above-mentioned shortcomings of the existing technology, the present invention provides a multi-functional parameter measuring device for diesel engine pistons, which can effectively solve the problem that existing technicians need to continuously adjust the rotation angle of the piston head and measure the piston head diameter at multiple positions. However, this measurement method can only reflect the overall wear of the piston head circumference and cannot accurately reflect the wear of a certain side of the piston head.

[0005] Technical solution To achieve the above objectives, the present invention provides the following technical solution: This invention provides a multi-functional parameter measuring device for a diesel engine piston, including a U-shaped frame with a centrally protruding support plate rotatably mounted below it. The upper part of the support plate is rotatably connected to the U-shaped frame via a plane bearing. Support blocks are fixedly mounted at both ends of the support plate, and a connecting column is fixedly mounted below each support block. The connecting column is used to connect to the top of the piston. Two mounting plates are respectively set at both ends of the U-shaped frame, and each mounting plate is equipped with a detection element for detecting the outer circumferential dimensions of the piston.

[0006] Furthermore, a support plate is fixedly installed on the U-shaped frame, the central axis of the support plate coincides with the central axis of the plane bearing, an annular groove is provided below the support plate, a support column is fixedly installed on the support block, and the upper end of the support column extends into the annular groove and is slidably connected to the inner wall of the annular groove.

[0007] Furthermore, a rectangular through hole is provided on the end face of the mounting plate facing the outer peripheral surface of the piston, and the detection element is slidably installed inside the rectangular through hole. A sliding groove for guiding the up and down movement of the detection element is provided inside the rectangular through hole.

[0008] Furthermore, the detection component includes a sliding frame and a laser rangefinder located inside the sliding frame. An elastic element is provided below the sliding frame for pulling the sliding frame downwards, and a connecting rope for pulling the sliding frame upwards is fixedly installed above the sliding frame.

[0009] Furthermore, a winding box is provided in the middle of the U-shaped frame, which is used to tighten the connecting rope to control the up and down position of the laser rangefinder.

[0010] Furthermore, a winding post is fixedly installed in the middle of the support plate. The upper end of the winding post passes through the planar bearing and the U-shaped frame. The upper end of the winding post extends into the interior of the winding box. The end of the connecting rope away from the sliding frame is fixedly connected to one side of the outer circumference of the winding post.

[0011] Furthermore, a connecting plate is fixedly installed above each of the test pieces, one end of the connecting rope is connected to the connecting plate, and a locking block is fixedly installed on the connecting plate for locking onto the connecting column.

[0012] Furthermore, the card block is provided with a card groove for locking onto the outside of the connecting post, and a protrusion is provided at the end of the inner wall of the card groove away from the connecting plate. The protrusion is elastic and is used to lock onto one side of the connecting post.

[0013] Furthermore, horizontal plates are fixedly installed on both sides of the middle part of the U-shaped frame, and multiple laser detectors for detecting the top of the piston are fixedly installed on each horizontal plate. The laser detectors are detachably installed on the horizontal plates.

[0014] Beneficial effects The technical solution provided by this invention has the following advantages compared with known public technologies: 1. In this invention, a U-shaped frame that can be locked onto the piston is provided, and a support plate is rotatably installed below the U-shaped frame. During use, the connecting columns at both ends of the support plate can be locked above the piston to support the rotation of the U-shaped frame. At the same time, mounting plates are provided below both ends of the U-shaped frame. The surface dimensions of each position on the outer surface of the piston can be clearly and accurately understood through the detection components on the mounting plates. This allows for a more precise understanding of the wear on each side of the piston surface, timely understanding of the piston surface wear condition, and facilitates the investigation of the cause of excessive wear.

[0015] 2. In this invention, by setting a support plate on the U-shaped frame and an annular groove below the support plate, and setting a support column on the support block, the bending of the U-shaped frame extending to both sides can be avoided during use, the distance between the two mounting plates at both ends of the U-shaped frame can be avoided, and the detection error can be reduced. In addition, during the detection process of the U-shaped frame rotating, the support column can be supported on the support plate, which can make the U-shaped frame more stable during rotation, and can prevent the U-shaped frame from tilting during rotation, further reducing the detection error.

[0016] 3. In this invention, by setting a winding box on the U-shaped frame, the coiled connecting rope can be protected to prevent damage during storage. By setting a winding post on the support plate and extending the upper end of the winding post into the winding box, the detection position of the laser rangefinder can be changed during the rotation of the U-shaped frame. Furthermore, by winding the connecting rope around the winding post, the laser rangefinder can be pulled upward, which can change the detection height of the laser rangefinder, allowing the laser rangefinder to perform detection in a spiral upward mode. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0018] Figure 1 This is a schematic diagram of the installation structure of the present invention; Figure 2 This is a schematic diagram of the overall structure of the present invention; Figure 3 This is an exploded view of the present invention; Figure 4 This is a schematic diagram of the folded state of the present invention; Figure 5 This is a schematic diagram of the folded state of the present invention from another perspective; Figure 6 This is a schematic diagram of the internal structure of the protective cover of the present invention; Figure 7 This is a schematic diagram of the internal structure of the winding box of the present invention; Figure 8 This is a schematic diagram of the mounting structure on the mounting plate of the present invention; Figure 9 For the present invention Figure 8 A magnified schematic diagram of the structure at point A.

[0019] The labels in the diagram represent: 1. Piston; 2. U-shaped frame; 21. Support plate; 211. Scale line; 2101. Annular groove; 22. Protective cover; 23. Connecting rope; 24. Winding box; 25. Horizontal plate; 251. Laser detector; 3. Mounting plate; 301. Rectangular through hole; 302. Slide groove; 31. Detection component; 311. Laser rangefinder; 312. Connecting plate; 313. Locking block; 3131. Protrusion; 3101. Locking groove; 32. Elastic component; 33. Connecting shaft; 4. Support plate; 41. Surface bearing; 42. Support block; 43. Connecting column; 44. Support column; 45. Winding column. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] The present invention will be further described below with reference to embodiments.

[0022] Example: A multi-functional parameter measuring device for diesel engine pistons, such as... Figure 1 - Figure 4 As shown, it includes a U-shaped frame 2, with a centrally protruding support plate 4 rotatably mounted below it. The upper part of the middle of the support plate 4 is rotatably connected to the U-shaped frame 2 through a plane bearing 41. Support blocks 42 are fixedly mounted at both ends of the support plate 4. A connecting column 43 is fixedly mounted below each support block 42. The connecting column 43 is used to connect to the upper part of the piston 1. Two mounting plates 3 are respectively set at both ends of the U-shaped frame 2, and each mounting plate 3 is equipped with a detection element 31 for detecting the outer circumferential surface dimension of the piston 1.

[0023] In this invention, a U-shaped frame 2 that can be locked onto the piston 1 is provided, and a support plate 4 is rotatably installed below the U-shaped frame 2. During use, the connecting columns 43 at both ends of the support plate 4 can be locked above the piston 1 to support the rotation of the U-shaped frame 2. At the same time, mounting plates 3 are provided below both ends of the U-shaped frame 2. The surface dimensions of each position on the outer surface of the piston 1 can be clearly and accurately obtained through the detection elements 31 on the mounting plates 3 (the distance between the two detection elements 31 is fixed, and the surface dimensions of the piston 1 can be determined by detecting the distance from the surface of the piston 1 to the detection elements 31). The wear amount on each side of the surface of the piston 1 can be more accurately obtained.

[0024] It should be noted that by performing multi-point sampling inspection on piston 1, it is possible to determine whether each area is excessively worn (after abnormal dimensions appear, manual fine measurement is performed). When the wear reaches a certain level, piston 1 is replaced. Above piston 1, there is a pre-set insertion port for the connecting column 43 to be inserted, which is the basic structure of commonly used piston 1.

[0025] It should be noted that a connecting shaft 33 is provided on the mounting plate 3. The mounting plate 3 is rotatably connected to the U-shaped frame 2 through the connecting shaft 33. The rotational connection angle between the connecting shaft 33 and the U-shaped frame 2 is 90 degrees, and there is damping between the connecting shaft 33 and the U-shaped frame 2. During the rotation of the U-shaped frame 2, the mounting plate 3 will not rotate naturally. These are all common rotational connection methods in the prior art, so they will not be described in detail in this application document.

[0026] In addition, a drive motor is fixedly installed on the support plate 4. The drive motor is used to drive the U-shaped frame 2 to rotate on the support plate 4. The drive motor drives the U-shaped frame 2 to rotate through gear meshing. The above technical features are common technical features in the prior art, so they will not be described in detail here.

[0027] Furthermore, such as Figure 3 and Figure 4 As shown, a support plate 21 is fixedly installed on the U-shaped frame 2. The central axis of the support plate 21 coincides with the central axis of the plane bearing 41. An annular groove 2101 is provided below the support plate 21. A support column 44 is fixedly installed on the support block 42. The upper end of the support column 44 extends into the annular groove 2101 and slides in connection with the inner wall of the annular groove 2101.

[0028] By setting a support plate 21 on the U-shaped frame 2 and an annular groove 2101 below the support plate 21, and setting a support column 44 on the support block 42, the bending of the U-shaped frame 2 extending to both sides can be avoided during use, the distance between the two mounting plates 3 at both ends of the U-shaped frame 2 can be avoided, and the detection error can be reduced. In addition, during the rotation of the U-shaped frame 2 for detection, the support column 44 can be supported on the support plate 21, which can make the rotation of the U-shaped frame 2 more stable and prevent the U-shaped frame 2 from tilting during rotation, further reducing the detection error.

[0029] In addition, a scale line 211 is provided on the support plate 21, which can provide a basis for the rotation angle of the U-shaped frame 2 and make it easy to understand the rotation angle of the U-shaped frame 2.

[0030] Furthermore, such as Figure 2 and Figure 3As shown, a rectangular through hole 301 is provided on the end face of the mounting plate 3 facing the outer peripheral surface of the piston 1. The detection element 31 is slidably installed inside the rectangular through hole 301. A sliding groove 302 for guiding the vertical movement of the detection element 31 is provided inside the rectangular through hole 301. The detection element 31 includes a sliding frame and a laser rangefinder 311 located inside the sliding frame. An elastic element 32 is provided below the sliding frame. The elastic element 32 is used to pull the sliding frame downward. A connecting rope 23 for pulling the sliding frame upward is fixedly installed above the sliding frame. A protective cover 22 is provided on the outside of the U-shaped frame 2 to protect the connecting rope 23.

[0031] Among them, by sliding the laser rangefinder 311 on the mounting plate 3, the outer peripheral surface of the piston 1 at different heights can be detected, and the wear of the piston 1 surface can be detected more thoroughly. By setting the connecting rope 23 above the sliding frame, the sliding frame and the laser rangefinder 311 on the sliding frame can be easily moved up and down by pulling the connecting rope 23 during the detection process.

[0032] Furthermore, such as Figure 6 and Figure 7 As shown, a winding box 24 is provided in the middle of the U-shaped frame 2. The winding box 24 is used to tighten the connecting rope 23 to control the up and down position of the laser rangefinder 311. A winding post 45 is fixedly installed in the middle of the support plate 4. The upper end of the winding post 45 passes through the plane bearing 41 and the U-shaped frame 2. The upper end of the winding post 45 extends into the interior of the winding box 24. The end of the connecting rope 23 away from the sliding frame is fixedly connected to one side of the outer circumference of the winding post 45.

[0033] The winding box 24 on the U-shaped frame 2 protects the coiled connecting rope 23 from damage during storage. The winding post 45 on the support plate 4 extends into the winding box 24. This allows the laser rangefinder 311 to change its detection position by rotating the U-shaped frame 2. Furthermore, by winding the connecting rope 23 around the winding post 45, the laser rangefinder 311 can be pulled upwards, changing its detection height and causing it to spiral upwards during detection.

[0034] Furthermore, such as Figure 4 and Figure 8 As shown, a connecting plate 312 is fixedly installed above each of the detection components 31. One end of the connecting rope 23 is connected to the connecting plate 312. A locking block 313 is fixedly installed on the connecting plate 312. The locking block 313 is used to lock onto the connecting post 43.

[0035] Specifically, by fixing a connecting plate 312 to the testing component 31 and setting a locking block 313 on the connecting plate 312, when the mounting plate 3 rotates to a horizontal position, the locking block 313 can be locked onto the connecting post 43, which can easily tighten the rotation position of the mounting plate 3, and facilitate folding the mounting plate 3 under the U-shaped frame 2 for easy storage (e.g., Figure 4 (Medium state).

[0036] Furthermore, such as Figure 9 As shown, the locking block 313 is provided with a locking groove 3101 for locking onto the outside of the connecting post 43. The inner wall of the locking groove 3101 is provided with a protrusion 3131 at one end away from the connecting plate 312. The protrusion 3131 is elastic and is used to lock onto one side of the connecting post 43.

[0037] Specifically, by setting a slot 3101 on the slot 313 and a protrusion 3131 on the inner wall of the slot 3101, when the slot 3101 is locked on one side of the connecting post 43, the protrusion 3131 can be locked on one side of the connecting post 43, preventing the connecting post 43 from falling out of the slot 3101, and making the slot 313 more stably locked on the outside of the connecting post 43.

[0038] Furthermore, such as Figure 5 and Figure 6 As shown, horizontal plates 25 are fixedly installed on both sides of the middle part of the U-shaped frame 2. Multiple laser detectors 251 for detecting the top of the piston 1 are fixedly installed on each horizontal plate 25 (the laser detectors 251 and the laser rangefinder 31 mentioned above are the same type of parts). The laser detectors 251 can be detachably installed on the horizontal plate 25.

[0039] By fixing horizontal plates 25 on both sides of the U-shaped frame 2 and installing multiple laser detectors 251 at intervals on the horizontal plates 25, the distance from the top of the piston 1 to the horizontal plate 25 can be conveniently detected during the rotation of the U-shaped frame 2, thereby calculating the wear amount at each position on the top of the piston 1, and determining whether to replace the piston 1 based on the wear amount.

[0040] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-functional parameter measuring device for diesel engine pistons, characterized in that, include: The U-shaped frame (2) has a centrally protruding support plate (4) rotatably mounted below it. The upper part of the support plate (4) is rotatably connected to the U-shaped frame (2) via a plane bearing (41). Support blocks (42) are fixedly mounted at both ends of the support plate (4). A connecting column (43) is fixedly mounted below each support block (42). The connecting column (43) is used to connect to the upper part of the piston (1). Two mounting plates (3) are respectively set at both ends of the U-shaped frame (2), and each mounting plate (3) is provided with a detection element (31) for detecting the outer circumferential dimension of the piston (1).

2. The multi-functional parameter measuring device for diesel engine pistons according to claim 1, characterized in that, A support plate (21) is fixedly installed on the U-shaped frame (2). The central axis of the support plate (21) coincides with the central axis of the plane bearing (41). An annular groove (2101) is provided below the support plate (21). A support column (44) is fixedly installed on the support block (42). The upper end of the support column (44) extends into the annular groove (2101) and slides in connection with the inner wall of the annular groove (2101).

3. The multi-functional parameter measuring device for diesel engine pistons according to claim 2, characterized in that, The mounting plate (3) has a rectangular through hole (301) on the end face facing the outer peripheral surface of the piston (1). The detection element (31) is slidably installed inside the rectangular through hole (301). The rectangular through hole (301) has a sliding groove (302) for guiding the detection element (31) to move up and down.

4. The multi-functional parameter measuring device for diesel engine pistons according to claim 3, characterized in that, The detection component (31) includes a sliding frame and a laser rangefinder (311) located inside the sliding frame. An elastic element (32) is provided below the sliding frame. The elastic element (32) is used to pull the sliding frame downward. A connecting rope (23) for pulling the sliding frame upward is fixedly installed above the sliding frame.

5. A multi-functional parameter measuring device for diesel engine pistons according to claim 4, characterized in that, A winding box (24) is provided in the middle of the U-shaped frame (2). The winding box (24) is used to tighten the connecting rope (23) to control the up and down position of the laser rangefinder (311).

6. The multi-functional parameter measuring device for diesel engine pistons according to claim 5, characterized in that, A winding post (45) is fixedly installed in the middle of the support plate (4). The upper end of the winding post (45) passes through the plane bearing (41) and the U-shaped frame (2). The upper end of the winding post (45) extends into the inside of the winding box (24). The end of the connecting rope (23) away from the sliding frame is fixedly connected to one side of the outer circumference of the winding post (45).

7. A multi-functional parameter measuring device for diesel engine pistons according to claim 6, characterized in that, A connecting plate (312) is fixedly installed above each of the test pieces (31). One end of the connecting rope (23) is connected to the connecting plate (312). A locking block (313) is fixedly installed on the connecting plate (312). The locking block (313) is used to lock onto the connecting column (43).

8. A multi-functional parameter measuring device for diesel engine pistons according to claim 7, characterized in that, The card block (313) is provided with a card groove (3101) for locking on the outside of the connecting post (43). The inner wall of the card groove (3101) away from the connecting plate (312) is provided with a protrusion (3131). The protrusion (3131) is elastic and is used to lock on one side of the connecting post (43).

9. A multi-functional parameter measuring device for diesel engine pistons according to claim 1, characterized in that, Both sides of the middle part of the U-shaped frame (2) are fixedly installed with horizontal plates (25), and each horizontal plate (25) is fixedly installed with multiple laser detectors (251) for detecting the top of the piston (1). The laser detectors (251) are detachably installed on the horizontal plate (25).

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