Piston pin clamp spring in-place detection device

Abstract

The utility model discloses a piston pin clamp spring in-place detection device, and belongs to the field of diesel engine assembling and manufacturing. Comprising a mounting frame, a placing frame and movable frames arranged in pairs, the placing frame is arranged in the middle of one side of the mounting frame, the movable frames are arranged on the two sides of the placing frame, the movable frames are arranged on the mounting frame in a sliding mode, the movable frames move face to face or back to back, and each movable frame is provided with a measuring structure; the measuring structure comprises a measuring frame, a measuring seat, a measuring rod and a displacement sensor; the measuring frame is arranged on the movable frame, the measuring seat is arranged on the measuring frame, the measuring rod is coaxially arranged in the measuring seat, one end of the measuring rod can stretch out in an elastic retraction mode to form a telescopic measuring end, the displacement sensor is arranged on the measuring frame and connected with the measuring rod, and the displacement sensor can measure the retraction amount of the measuring rod. The technical problems that manual visual detection is difficult to find, efficiency is low and automation is inconvenient in traditional piston pin clamp spring in-situ detection are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of diesel engine assembly and manufacturing, especially to a piston pin snap spring in position detection device. BACKGROUND

[0002] In the diesel engine assembly and manufacturing, the piston pin snap spring (inner snap spring) needs to be clamped into the clamping groove of the piston pin hole, so that the piston and the piston connecting rod are connected and limited by the spring clamp without being pulled out. The piston pin snap spring is the main piston pin locking part. If the snap spring is not completely seated in the groove, it will be easily hit and pulled out by the piston pin during engine operation, resulting in engine cylinder pulling and scrapping. Therefore, after assembling the piston pin snap spring, it is necessary to detect whether the snap spring is assembled in place and whether the piston pin is correctly locked. The snap spring is small in size and rich in toughness. After the snap spring is assembled into the groove, it is interference fit and cannot be moved by fingers. After manual or automatic assembly of the snap spring, the open part of the snap spring is easy to be placed on the groove edge, which is difficult to be found by manual visual inspection. Moreover, one piston has two piston pin snap springs, and one engine has six pistons. Manual visual inspection or bending over to check is easy to be tired and has man-machine engineering risk. Manual detection by holding tool is difficult to control in cleanliness and lacks data record to improve detection ability.

[0003] Therefore, it is necessary to invent a device for improving the installation of the piston pin snap spring in place, improving the detection ability and reducing the man-machine engineering risk of frequent manual bending over visual inspection. SUMMARY

[0004] The utility model aims at the above problems, provides a kind of piston pin snap spring in position detection device, solves the technical problems that traditional piston pin snap spring in position detection exists manual visual inspection difficult to find, low efficiency and poor effect.

[0005] To achieve the above object, the technical scheme adopted by the utility model is as follows:

[0006] A kind of piston pin snap spring in position detection device, including mounting frame, placing rack, the movable frame of being set in pairs, the placing rack is equipped in the middle of the mounting frame one side, the movable frame is set in pairs in the both sides of the placing rack, the movable frame is slidably equipped in the mounting frame, the movable frame moves towards each other or away from each other, each movable frame is provided with measuring structure;The measuring structure includes measuring frame, measuring seat, measuring rod and displacement sensor;The measuring frame is equipped in the movable frame, the measuring seat is equipped in the measuring frame, the measuring rod is coaxially equipped in the measuring seat and the outer end of one end can be elastically retracted to form telescopic measuring end, the displacement sensor is equipped in the measuring frame and is connected with the measuring rod, the displacement sensor can measure the retraction amount of the measuring rod.

[0007] Further, the movable racks arranged in pairs are connected through a telescopic device, and the telescopic device is telescoped to form the opposite or opposite movement of the movable racks.

[0008] Further, a buffer is arranged on the mounting rack and located between the movable racks arranged in pairs.

[0009] Further, the movable rack is slidably arranged on the mounting rack through a first sliding rail, and limit blocks are arranged at both ends of the first sliding rail.

[0010] Further, a side of the upper part of the placing rack is provided with a connecting rod group placing part, and a lower part of the placing rack is provided with a piston placing part.

[0011] Further, a rack and a servo telescopic mechanism are further included, the placing rack is slidably arranged on the rack through a second sliding rail, and the servo telescopic mechanism is arranged on the rack and pushes the mounting rack to slide.

[0012] Further, each movable rack is provided with multiple groups of measuring structures of different types.

[0013] Further, a protruding positioning column is arranged in the middle of the end face of the telescopic measuring end.

[0014] Further, one end of the positioning column is arranged in a cylindrical shape, and the other end is arranged in a tapered shape, and the cylindrical end is connected with the telescopic measuring end.

[0015] Due to the adoption of the above technical scheme, the beneficial effects of the present application are as follows:

[0016] 1. When the present application is used, the piston to be detected is placed on the placing rack, the movable rack drives the two movable racks to move towards each other, so that the measuring structures located at both ends of the piston pin approach the piston; then the measuring end of the measuring rod abuts against the outer end of the snap spring at both ends of the piston pin, until the measuring seat moves to the position, the relative displacement between the measuring rod and the measuring seat is measured by the displacement sensor, the displacement measured by the displacement sensor is compared with the standard amount of the assembled snap spring, and whether the snap spring is in place is obtained; based on the above, the present application realizes automatic detection, and the standardization of high detection consultation and effect are improved, the labor intensity of workers is reduced, and the technical problems of traditional piston pin snap spring in-place detection, such as difficult to detect by manual visual inspection, low efficiency and poor effect, are solved.

[0017] 2. The buffer can reduce the impact force between the device and the parts, the limit block and the buffer are arranged, and the telescopic device can realize the movement of the movable racks arranged in pairs relative to the piston, prevent the movable rack from being opened only in one direction, and improve the reliability.

[0018] 3. The utility model discloses a rack and servo telescopic mechanism can be set up, can make mounting frame, rest, the integral movement of the pair of movable frame set, can be convenient for mounting frame, rest, the integral station change of pair of movable frame set uses, the application of convenient production line, through being provided with the locating post, the locating post can be inserted into the through -hole of piston pin, realizes the accurate positioning of piston pin, makes the end of piston pin opposite the measuring rod, improves the accuracy of measurement. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is three-dimensional view of the utility model in use state;

[0020] Figure 2 It is top view of the utility model in use state;

[0021] In the drawing, 1-mounting frame, 2-rest, 3-movable frame, 4-measuring structure, 5-telescopic device, 6-rack, 7-servo telescopic mechanism, 8-piston, 9-connecting rod group, 11-bumper, 12-first slide rail, 13-limiting block, 21-connecting rod group placement part, 22-piston placement part, 41-measuring frame, 42-measuring seat, 43-measuring rod, 44-displacement sensor, 45-positioning column, 61-second slide rail. DETAILED DESCRIPTION

[0022] The specific implementation of the utility model is further described below in combination with the drawings.

[0023] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "length", "width", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0024] In the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, can be fixedly connected, can be detachably connected, or can be integrated, can be directly connected, or indirectly connected through an intermediate medium, can be the communication or interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0025] In the utility model, unless another definite provision and limitation, first feature is in second feature "on" or "under" can include that first and second features are in direct contact, also can include that first and second features are not in direct contact but contact through other feature between them.Moreover, first feature is in second feature "on", "above" and "upper surface" include that first feature is in second feature directly above and obliquely above, or just indicate that first feature horizontal height is higher than second feature.First feature is in second feature "under", "below" and "under surface" include that first feature is in second feature directly below and obliquely below, or just indicate that first feature horizontal height is less than second feature.

[0026] Please see Figure 1 and Figure 2 A piston pin snap spring in position detection device, including mounting frame 1, placing frame 2, the pair of movable frame 3 that is arranged, placing frame 2 is equipped in the middle of one side of mounting frame 1, and the movable frame 3 is arranged on the both sides of placing frame 2, and the movable frame 3 is slidably equipped in mounting frame 1, and the movable frame 3 moves towards each other or away from each other, and the measuring structure 4 is arranged on each movable frame 3;Measuring structure 4 includes measuring frame 41, measuring seat 42, measuring rod 43 and displacement sensor 44;Measuring frame 41 is equipped on movable frame 3, measuring seat 42 is equipped on measuring frame 41, measuring rod 43 is coaxially equipped in measuring seat 42 and the outer extension of one end is formed retractable measuring end, and displacement sensor 44 is equipped on measuring frame 41 and is connected with measuring rod 43, and displacement sensor 44 can measure the retraction of measuring rod 43.

[0027] In the embodiment, the pair of movable frame 3 is connected through a telescopic device 5, and the telescopic device 5 is telescopic to form the movement of the movable frame 3 towards each other or away from each other, specifically, the telescopic device 5 is a pneumatic telescopic rod, the cylinder bottom of the pneumatic telescopic rod is fixedly connected with one movable frame 3, and the extension end of the pneumatic telescopic rod is fixedly connected with the other movable frame 3.

[0028] In the embodiment, one side of the upper portion of the placing frame 2 is provided with a connecting rod set placing part 21, and the lower portion of the placing frame 2 is provided with a piston placing part 22.

[0029] In the embodiment, the rack 6 and the servo telescopic mechanism 7 are further included, the placing rack 2 is slidably arranged on the rack 6 through the second slide rail 61, and the servo telescopic mechanism 7 is arranged on the rack 6 and pushes the mounting rack 1 to slide. By arranging the rack 6 and the servo telescopic mechanism 7, the mounting rack 1, the placing rack 2 and the pair of movable racks 3 can be moved as a whole, the mounting rack 1, the placing rack 2 and the pair of movable racks 3 can be conveniently used in the change of the whole station, and the application on the production line is facilitated.

[0030] In the embodiment, each movable rack 3 is provided with a plurality of groups of measuring structures 4 of different types, and the plurality of groups of measuring structures 4 of different types can meet the measuring use of pistons of different types. The end face of the telescopic measuring end is provided with a protruding positioning column 45. One end of the positioning column 45 is arranged in a cylindrical shape, and the other end is arranged in a tapered shape which is smaller. The cylindrical end is connected with the telescopic measuring end. The tapered end is used for guiding, and the cylindrical end can be inserted into the internal through hole of the piston pin to realize accurate positioning.

[0031] The use principle is as follows:

[0032] 1. The device rotates on the production line, and when detection is needed, the servo telescopic mechanism 7 moves the mounting rack 1, the placing rack 2 and the pair of movable racks 3 as a whole to the measuring station.

[0033] 2. The lower part of the piston 8 is placed in the recess, and the upper part of the connecting rod set 9 is placed on one side of the connecting rod set placing part 21.

[0034] 3. The pair of movable racks 3 move towards each other, the tapered end of the positioning column 45 is used for guiding, and the cylindrical end can be inserted into the internal through hole of the piston pin to realize accurate positioning of the piston 8.

[0035] 4. The telescopic measuring end is positioned by abutting against the snap spring, and the relative displacement amount is measured by the displacement sensor 44.

[0036] 5. The displacement amount measured by the displacement sensor 44 is compared with the standard amount of the assembled snap spring, whether the snap spring is positioned or not is obtained, and the detection is completed.

[0037] The above description is a detailed description of the preferred and feasible embodiment of the utility model, but the embodiment is not used to limit the patent application range of the utility model, and any equivalent change or modification change completed under the technical spirit of the utility model should belong to the patent range covered by the utility model.

Claims

1. A piston pin clip in place detection device characterized by: The utility model provides a kind of measuring device, including mounting frame, placing rack, pair of movable frame, the placing rack is equipped in the middle of one side of the mounting frame, the movable frame is set in the both sides of the placing rack, the movable frame is slidably equipped in the mounting frame, the movable frame moves towards each other or away from each other, and measuring structure is set on each movable frame;The measuring structure includes measuring frame, measuring seat, measuring rod and displacement sensor;The measuring frame is equipped in the movable frame, the measuring seat is equipped in the measuring frame, the measuring rod is coaxially equipped in the measuring seat and one end can be elastically retracted to form telescopic measuring end, the displacement sensor is equipped in the measuring frame and is connected with the measuring rod, and the displacement sensor can measure the retraction amount of the measuring rod.

2. A piston pin clip in place detection device according to claim 1, characterized in that: The pair of movable frames are connected by a telescopic device, and the telescopic movement of the telescopic device forms the towards or away from each other movement of the movable frames.

3. A piston pin clip in place detection device according to claim 2, wherein: The mounting frame is also provided with a buffer between the pair of movable frames.

4. A piston pin clip in place detection device according to claim 2, wherein: The movable frame is slidably equipped in the mounting frame by a first sliding rail, and the both ends of the first sliding rail are provided with limit blocks.

5. A piston pin clip in place detection device as defined in claim 1 wherein: One side of the upper part of the placing rack is provided with a connecting rod group placing part, and the lower part of the placing rack is provided with a piston placing part.

6. A piston pin clip in place detection device as defined in claim 1 wherein: The placing rack is slidably equipped in the rack by a second sliding rail, and a servo telescopic mechanism is equipped in the rack and pushes the mounting frame to slide.

7. A piston pin clip in place detection device as defined in claim 1 wherein: Each movable frame is provided with multiple groups of measuring structures of different types.

8. A piston pin clip in place detection device as defined in claim 1 wherein: The end surface of the telescopic measuring end is provided with a protruding positioning column in the middle.

9. A piston pin clip in place detection device according to claim 8, wherein: One end of the positioning column is cylindrical, and the other end is tapered. The cylindrical end is connected with the telescopic measuring end.

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