A piston pin circlip assembly detection device

Abstract

The present invention discloses a piston pin snap ring assembly detection device, which is used in the assembly process of the snap ring and the piston pin. The piston pin snap ring assembly detection device includes a support seat and a detection component; the support seat is used for detachably mounting on the top of the piston pin, and the support seat is formed with a plurality of detection positions in the up and down directions. A detection rod is provided on the support seat, and the detection rod can move up and down, so that when one end of the detection rod moves into the piston pin and abuts against the snap ring in the piston pin or the bottom of the piston pin, the other end of the detection rod can move to the corresponding detection position; the detection component includes a plurality of induction parts provided on the support seat and a trigger part provided at the other end of the detection rod. The plurality of induction parts are arranged corresponding to the plurality of detection positions, so that when the other end of the detection rod moves to the corresponding detection position, it can be triggered by the trigger part on the other end of the detection rod to generate an induction signal, and the plurality of induction signals of the plurality of induction parts are used to respectively correspond to a plurality of different assembly states of the snap ring.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile assembly manufacturing, and particularly to a piston pin circlip assembly detection device. Background Art

[0002] The piston pin circlip is an important component for the power output of the engine, and is a limiting part to prevent the piston pin connecting the connecting rod and the piston of the engine from disengaging during high-speed reciprocating motion. The piston pin circlip is a ring with a diameter between ten and twenty millimeters, and the cross-section of the ring is circular. Due to the characteristic of having a variable cross-section and an opening in the circumferential direction, the piston pin circlip can radially contract under the action of an external force, making it easy to install the piston pin circlip into the piston circlip hole. And after the piston pin circlip is installed into the piston hole, it is not easy to fall off due to the action of its elastic expansion force, thus achieving the effect of restricting the detachment of the piston pin; whether the piston pin circlip is pressed in place is related to the safety and performance of the engine operation and other characteristics.

[0003] During the circlip pressing process, common defects include missing installation of the circlip and incomplete pressing; currently, most workers use visual inspection by operators or error prevention by vision systems to detect whether the circlip pressing is defective; however, visual inspection by operators is prone to problems such as missed inspection or misjudgment, and error prevention by vision systems not only has high costs, but also is easily affected by part factors, resulting in a low success rate of error prevention recognition. Summary of the Invention

[0004] The main object of the present invention is to propose a piston pin circlip assembly detection device, aiming to solve the problems that the existing circlip pressing detection methods are prone to missed inspection or misjudgment, and the detection cost is high and the success rate is low.

[0005] To achieve the above object, the present invention proposes a piston pin circlip assembly detection device for use in the assembly process of the circlip and the piston pin. The piston pin circlip assembly detection device includes:

[0006] A support seat for detachably mounting on the top of the piston pin. The support seat is formed with a plurality of detection positions in the up and down directions. A detection rod is provided on the support seat, and the detection rod can move up and down so that when one end of it moves into the piston pin and abuts against the circlip inside the piston pin or the bottom of the piston pin, the other end of it can move to the corresponding detection position; and,

[0007] A detection assembly including a plurality of induction parts provided on the support seat and a trigger part provided at the other end of the detection rod. The plurality of induction parts are arranged corresponding to the plurality of detection positions so that when the other end of the detection rod moves to the corresponding detection position, it can be triggered by the trigger part at the other end of the detection rod to generate an induction signal, and the plurality of induction signals of the plurality of induction parts are respectively used to correspond to a plurality of different assembly states of the circlip.

[0008] Optionally, the support base has an installation cavity;

[0009] The detection rod is arranged in the installation cavity, and one end of the detection rod is used for movably penetrating through the bottom plate of the support base in the up-and-down direction and extending into the piston pin;

[0010] The triggering part is arranged at the other end of the detection rod;

[0011] A plurality of the detection positions are formed on the inner wall of the installation cavity. Correspondingly, the sensing parts at each of the detection positions are arranged on the inner wall of the installation cavity.

[0012] Optionally, the installation cavity has a first side wall and a second side wall which are oppositely arranged;

[0013] The plurality of detection positions include a first detection position, a second detection position and a third detection position. The first detection position is formed on the first side wall, the second detection position is formed on the second side wall and is above the first detection position, and the third detection position is formed on the top wall of the installation cavity;

[0014] Three sensing parts are provided. The three sensing parts are respectively arranged corresponding to the first detection position, the second detection position and the third detection position, so as to be triggered by the triggering part and respectively generate a first induction signal, a second induction signal and a third induction signal, which are used to respectively correspond to the missing installation state, the qualified state and the non-in-place assembly state of the circlip.

[0015] Optionally, the piston pin circlip assembly detection device further includes a circuit board assembly, and corresponding current circuits are formed at positions corresponding to each of the detection positions on the circuit board assembly;

[0016] The detection assembly includes a plurality of conduction parts arranged on the support base. Each conduction part is arranged corresponding to each detection position and is on the corresponding current circuit;

[0017] The detection rod is electrically connected to the circuit board assembly, so that when the other end of the detection rod moves to the corresponding detection position, the triggering part at the other end of the detection rod can contact the corresponding conduction part and make the corresponding current circuit conduct, so as to generate a corresponding conduction current signal;

[0018] Among them, the plurality of sensing parts include the plurality of conduction parts;

[0019] The induction signal includes the conduction current signal.

[0020] Optionally, each of the conducting parts includes a conducting contact and a detection probe arranged at intervals. The conducting contact is arranged corresponding to the tail of the detection probe, and the detection probe is movably arranged so as to be able to move to make its tail contact and conduct with the conducting contact;

[0021] On the moving stroke of the detection rod, the triggering part at the other end of the detection rod can move to abut against the head of the detection probe and push the detection probe to move so that its tail moves to contact and conduct with the conducting contact, thereby making the current loop conduct.

[0022] Optionally, a conducting bump is provided at the other end of the detection rod. The side part of the conducting bump protrudes outward from the side part of the detection rod. When the other end of the detection rod moves to the corresponding detection position, the side part of the conducting bump can abut against the head of the detection probe and push the detection probe to move;

[0023] Wherein, the triggering part includes the conducting bump.

[0024] Optionally, a stop bump is provided on the periphery of the detection probe and at a position close to its head;

[0025] A first return spring is sleeved on the detection probe, and the first return spring is located between the stop bump and the support seat.

[0026] Optionally, the piston pin circlip assembly detection device further includes:

[0027] An indicating component, including a plurality of indicating lights electrically connected to the circuit board component, and each of the indicating lights is respectively on each of the current loops; and,

[0028] A controller, electrically connected to the circuit board component, to control the indicating light on the corresponding current loop to turn on when the current loop conducts and generates a corresponding conduction current signal.

[0029] Optionally, the detection rod has a first end and a second end arranged oppositely. The first end includes an end body and a pressing plate arranged on the end body. The pressing plate is used to abut against the circlip in the piston pin or the bottom of the piston pin;

[0030] Wherein, the triggering part is arranged at the second end.

[0031] Optionally, a second return spring is provided between the pressing plate and the bottom plate of the support seat.

[0032] In the technical solution of the present invention, a detection rod is provided on the support base, and the detection rod can move up and down; a plurality of induction parts are provided on the support base, and a trigger part is provided at the other end of the detection rod. The plurality of induction parts are arranged corresponding to a plurality of detection positions, so that when the other end of the detection rod moves to the corresponding detection position, it can be triggered by the trigger part on the other end of the detection rod to generate an induction signal. The plurality of induction signals of the plurality of induction parts are used to respectively correspond to a plurality of different assembly states of the circlip; that is to say, a plurality of the detection positions are formed on the support base, and the plurality of detection positions at least correspond to three states of the circlip being missing, qualified, and not assembled in place. During detection, the support base is arranged on the piston pin, and one end of the detection rod extends into the piston pin. When the circlip is missing, one end of the detection rod abuts against the bottom of the piston pin, and the other end of the detection rod drives the trigger part to move to the detection position corresponding to the state of the missing circlip, and the trigger part triggers the induction part at this detection position to generate a corresponding missing induction signal; when the circlip is assembled qualifiedly, one end of the detection rod abuts against the circlip in the piston pin, and the other end of the detection rod drives the trigger part to move to the detection position corresponding to the qualified state, and the trigger part triggers the induction part at this detection position to generate a corresponding qualified induction signal; when the circlip is assembled unqualifiedly, one end of the detection rod abuts against the circlip in the piston pin, and the other end of the detection rod drives the trigger part to move to the detection position corresponding to the state of not assembled in place, and the trigger part triggers the induction part at this detection position to generate a corresponding not assembled in place induction signal; with such a setting, the piston pin circlip assembly detection device has a simple structure and low cost; at the same time, using the piston pin circlip assembly detection device to replace the operator's visual inspection is not likely to have problems such as missed inspection or misjudgment; furthermore, the detection method of the piston pin circlip assembly detection device will not be affected by part factors and can accurately detect assembly defects, thereby improving the detection success rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0034] Figure 1 It is a schematic structural diagram of a piston pin circlip assembly detection device (one embodiment) provided by the present invention;

[0035] Figure 2 is Figure 1 a schematic diagram of the assembly state of the circlip in

[0036] Description of the reference numerals in the embodiments provided by the present invention:

[0037]

[0038]

[0039] The realization, functional features and advantages of the object of the present invention will be further described in conjunction with the embodiments with reference to the accompanying drawings. Specific embodiments

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0041] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention, then the directional indications are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0042] In addition, if there are descriptions such as "first", "second", etc. in the embodiments of the present invention, then the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0043] During the process of snap ring press-fitting, common defects include missing snap rings and incomplete press-fitting; currently, most staff use visual inspection by operators or error prevention by vision systems to detect whether the snap ring press-fitting is defective; however, visual inspection by operators is prone to problems such as missed inspection or misjudgment, and error prevention by vision systems not only has high costs but is also easily affected by part factors, resulting in a low success rate of error prevention recognition.

[0044] In view of this, the present invention provides a piston pin snap ring assembly detection device. Figures 1 to 2This is an embodiment of the piston pin circlip assembly detection device provided by the present invention.

[0045] Please refer to Figure 1 , the piston pin circlip assembly detection device 100 is used in the assembly process of the circlip 200 and the piston pin 300. The piston pin circlip assembly detection device 100 includes a support seat 1 and a detection assembly 3. The support seat 1 is used for detachably mounting on the top of the piston pin 300. The support seat 1 is provided with a plurality of detection positions in the up and down directions. A detection rod 2 is provided on the support seat 1. The detection rod 2 can move up and down, so that when one end of it moves into the piston pin 300 and abuts against the circlip 200 inside the piston pin 300 or the bottom of the piston pin 300, the other end of it can move to the corresponding detection position. The detection assembly 3 includes a plurality of induction parts 31 provided on the support seat 1 and a trigger part 32 provided at the other end of the detection rod 2. The plurality of induction parts 31 are arranged corresponding to the plurality of detection positions, so that when the other end of the detection rod 2 moves to the corresponding detection position, it can be triggered by the trigger part 32 on the other end of the detection rod 2 to generate an induction signal. The plurality of induction signals of the plurality of induction parts 31 are used to respectively correspond to a plurality of different assembly states of the circlip 200.

[0046] In the technical solution of the present invention, a detection rod 2 is provided on the support base 1, and the detection rod 2 can move up and down; a plurality of induction parts 31 are provided on the support base 1, and a trigger part 32 is provided at the other end of the detection rod 2. The plurality of induction parts 31 are arranged corresponding to a plurality of detection positions, so that when the other end of the detection rod 2 moves to the corresponding detection position, it can be triggered by the trigger part 32 on the other end of the detection rod 2 to generate an induction signal. The plurality of induction signals of the plurality of induction parts 31 are used to respectively correspond to a plurality of different assembly states of the circlip 200; that is to say, a plurality of the detection positions are formed on the support base 1, and the plurality of detection positions at least correspond to three states of missing installation, qualified, and misassembly of the circlip 200. During detection, the support base 1 is arranged on the piston pin 300, and one end of the detection rod 2 extends into the piston pin 300. When the circlip 200 is missing, one end of the detection rod 2 abuts against the bottom of the piston pin 300, and the other end of the detection rod 2 drives the trigger part 32 to move to the detection position corresponding to the missing installation state of the circlip 200, and the trigger part 32 triggers the induction part 31 at this detection position to generate a corresponding missing installation induction signal; when the circlip 200 is assembled qualifiedly, one end of the detection rod 2 abuts against the circlip 200 in the piston pin 300, and the other end of the detection rod 2 drives the trigger part 32 to move to the detection position corresponding to the qualified state, and the trigger part 32 triggers the induction part 31 at this detection position to generate a corresponding qualified induction signal; when the circlip 200 is assembled unqualifiedly, one end of the detection rod 2 abuts against the circlip 200 in the piston pin 300, and the other end of the detection rod 2 drives the trigger part 32 to move to the detection position corresponding to the misassembly state, and the trigger part 32 triggers the induction part 31 at this detection position to generate a corresponding misassembly induction signal; with such a setting, the piston pin circlip assembly detection device 100 has a simple structure and low cost; at the same time, using the piston pin circlip assembly detection device 100 to replace the operator's visual inspection is not prone to problems such as missed inspection or misjudgment; furthermore, the detection method of the piston pin circlip assembly detection device 100 will not be affected by part factors and can accurately detect assembly defects, thereby improving the detection success rate.

[0047] Specifically, the support base 1 has an installation cavity 11; the detection rod 2 is arranged in the installation cavity 11, and one end of it is used to move up and down through the bottom plate 12 of the support base 1 and extend into the piston pin 300; the trigger part 32 is arranged at the other end of the detection rod 2; a plurality of the detection positions are formed on the inner wall of the installation cavity 11. Correspondingly, the induction parts 31 at each detection position are arranged on the inner wall of the installation cavity 11; with such a setting, the structure installation of the piston pin circlip assembly detection device 100 is more compact.

[0048] Further refer toFigure 1 and Figure 2 The installation cavity 11 has a first side wall and a second side wall that are oppositely arranged; the multiple detection positions include a first detection position, a second detection position, and a third detection position. The first detection position is formed on the first side wall, the second detection position is formed on the second side wall and is above the first detection position, and the third detection position is formed on the top wall of the installation cavity 11; three induction parts 31 are provided, and the three induction parts 31 are respectively arranged corresponding to the first detection position, the second detection position, and the third detection position, so as to be triggered by the trigger part 32 and respectively generate a first induction signal, a second induction signal, and a third induction signal, which are used to respectively correspond to the missing installation state, the qualified state, and the misassembly state of the snap ring 200; that is to say, when the snap ring 200 is missing, one end of the detection rod 2 abuts against the bottom of the piston pin 300, and the other end of the detection rod 2 drives the trigger part 32 to move to the first detection position, and the trigger part 32 triggers the induction part 31 at the first detection position to generate a corresponding missing installation induction signal; when the snap ring 200 is assembled qualifiedly, one end of the detection rod 2 abuts against the snap ring 200 in the piston pin 300, and the other end of the detection rod 2 drives the trigger part 32 to move to the second detection position, and the trigger part 32 triggers the induction part 31 at the second detection position to generate a corresponding qualified induction signal; when the snap ring 200 is assembled unqualifiedly, one end of the detection rod 2 abuts against the snap ring 200 in the piston pin 300, and the other end of the detection rod 2 drives the trigger part 32 to move to the third detection position, and the trigger part 32 triggers the induction part 31 at the second detection position to generate a corresponding misassembly induction signal; with such a setting, the piston pin snap ring assembly detection device 100 has a simple structure and low cost; at the same time, using the piston pin snap ring assembly detection device 100 to replace the operator's visual inspection is not prone to problems such as missed inspection or misjudgment; furthermore, the detection method of the piston pin snap ring assembly detection device 100 will not be affected by part factors and can accurately detect assembly defects, thereby improving the detection success rate.

[0049] It should be noted that for further reference Figure 2, the three states of the snap ring 200 installation respectively correspond to three depths (a, b, c) of one end of the detection rod 2 in the piston pin 300. When one end of the detection rod 2 is at depth a, the wire diameter center of the snap ring 200 is located at the notch of the installation groove of the piston pin 300. Due to the tension operation of the snap ring 200, the snap ring 200 can smoothly slide into the installation groove, and the snap ring 200 is pressed in place, and its depth fully meets the requirements of the snap ring 200 assembly design; when one end of the detection rod 2 is at depth b, the wire diameter center of the snap ring 200 is higher than the notch of the installation groove of the piston pin 300, and the snap ring 200 cannot slide into the installation groove and stays above the notch of the installation groove, and the snap ring 200 is not pressed in place; when one end of the detection rod 2 is at depth c, one end of the detection rod 2 contacts the bottom of the piston pin 300, and the snap ring 200 is not installed; and from the positional relationship of a, b, c, it can be known that a - b > 1 / 2d 卡簧 (d is the wire diameter of the snap ring), c - a > d 卡簧 , with such a setting, the three depths of one end of the detection rod 2 in the piston pin 300 are segmented, which also makes the dimensions corresponding to the three states of the snap ring 200 installation have no overlapping areas, and the corresponding induction parts 31 are also set at different positions, so as to ensure the accuracy of detection.

[0050] It should be noted that the present invention does not limit the specific forms of the induction part 31 and the trigger part 32, and can detect through electromagnetic induction or infrared induction.

[0051] Specifically, in the present invention, the piston pin snap ring assembly detection device 100 further includes a circuit board assembly 4, and corresponding current circuits are formed at each of the detection positions on the circuit board assembly 4; the detection assembly 3 includes a plurality of conduction parts arranged on the support seat 1, and each of the conduction parts is correspondingly arranged at each of the detection positions and is on the corresponding current circuit; the detection rod 2 is electrically connected to the circuit board assembly 4, so that when the other end of the detection rod 2 moves to the corresponding detection position, the trigger part 32 on the other end of the detection rod 2 can contact the corresponding conduction part and make the corresponding current circuit conduct, so as to generate a corresponding conduction current signal; wherein, the plurality of induction parts 31 include the plurality of conduction parts; the induction signal includes the conduction current signal; that is to say, when the detection rod 2 moves to make one end of it extend into the piston pin 300 and abut against the snap ring 200 or the bottom of the piston pin 300 in the piston pin 300, the other end of the detection rod 2 can move to the corresponding detection position, and the induction part 31 at the corresponding detection position is triggered by the trigger part 32 and generates a corresponding conduction current signal, and the plurality of conduction current signals are used to respectively correspond to a plurality of different assembly states of the snap ring 200. In this way, the piston pin snap ring assembly detection device 100 has a simple structure and convenient detection.

[0052] More specifically, each of the conducting parts includes conducting contacts 311 and detection probes 312 that are arranged at intervals. The conducting contacts 311 are arranged corresponding to the tails of the detection probes 312. The detection probes 312 are movably arranged so that they can move to make their tails contact and conduct with the conducting contacts 311. On the moving stroke of the detection rod 2, the triggering part 32 at the other end of the detection rod 2 can move to abut against the heads of the detection probes 312 and push the detection probes 312 to move so that their tails move to contact and conduct with the conducting contacts 311, thereby making the current loop conduct. In this embodiment, by the triggering part 32 abutting against the heads of the detection probes 312 and pushing the detection probes 312 to move so that their tails move to contact and conduct with the conducting contacts 311, the current loop is made to conduct, and the structure is simple and the detection is convenient.

[0053] It should be noted that a conducting bump 321 is provided at the other end of the detection rod 2. The side part of the conducting bump 321 protrudes outward from the side part of the detection rod 2. When the other end of the detection rod 2 moves to the corresponding detection position, the side part of the conducting bump 321 can abut against the heads of the detection probes 312 and push the detection probes 312 to move. Among them, the triggering part 32 includes the conducting bump 321. That is to say, when the other end of the detection rod 2 moves to the corresponding detection position, the side part of the conducting bump 321 can abut against the heads of the detection probes 312 and push the detection probes 312 to move, so that the current loop conducts, and the structure is simple and the detection is convenient.

[0054] At the same time, a stop bump 313 is provided on the circumferential side of the detection probe 312 and near its head. A first return spring 314 is sleeved outside the detection probe 312. The first return spring 314 is located between the stop bump 313 and the support base 1. When the other end of the detection rod 2 moves away from the detection position, the side part of the conducting bump 321 can be separated from the heads of the detection probes 312, and the first return spring 314 drives the detection probes 312 to reset, and the structure is simple.

[0055] In the present invention, the piston pin snap ring assembly detection device 100 further includes an indicating component 5 and a controller; the indicating component 5 includes a plurality of indicator lights 51 electrically connected to the circuit board component 4, and each of the indicator lights 51 is respectively located on each of the current loops; the controller is electrically connected to the circuit board component 4 to control the corresponding indicator light 51 on the current loop to turn on when the current loop is turned on and a corresponding conduction current signal is generated; with such a setting, due to the difference in the positional relationship of the snap ring 200 in different press-fitting states and converting it into a circuit on-off relationship, the operator has a clearer visual judgment, thus solving the problem in the prior art that the visual inspection cannot accurately judge the press-fitting state of the snap ring 200.

[0056] It should be noted that, to make the detection more convenient and accurate, the indicator lights 51 on the plurality of current loops can be set to have different colors. Taking the following specific embodiment as an example, when the snap ring 200 is missing, one end of the detection rod 2 abuts against the bottom of the piston pin 300, and the other end of the detection rod 2 moves to the first detection position, and the side of the conduction bump 321 at the other end of the detection rod 2 can abut against the head of the detection probe 312 at the first detection position and push the detection probe 312 to move, so as to turn on the corresponding current loop, and the indicator light 51 (red light) turns on; when the snap ring 200 is assembled qualifiedly, one end of the detection rod 2 abuts against the snap ring 200 inside the piston pin 300, and the other end of the detection rod 2 moves to the second detection position, and the side of the conduction bump 321 at the other end of the detection rod 2 can abut against the head of the detection probe 312 at the second detection position and push the detection probe 312 to move, so as to turn on the corresponding current loop, and the indicator light 51 (green light) turns on; when the snap ring 200 is assembled unqualifiedly, one end of the detection rod 2 abuts against the snap ring 200 inside the piston pin 300, and the other end of the detection rod 2 moves to the third detection position, and the side of the conduction bump 321 at the other end of the detection rod 2 can abut against the head of the detection probe 312 at the third detection position and push the detection probe 312 to move, so as to turn on the corresponding current loop, and the indicator light 51 (yellow light) turns on; with such a setting, for different installation states of the snap ring 200, indicator lights 51 of different colors turn on, with obvious distinction, so that the operator has a clearer visual judgment, thus solving the problem in the prior art that the visual inspection cannot accurately judge the press-fitting state of the snap ring 200.

[0057] In the present invention, the detection rod 2 has a first end and a second end which are oppositely arranged. The first end includes an end body and a pressing plate 21 provided on the end body. The pressing plate 21 is used to abut against the circlip 200 in the piston pin 300 or the bottom of the piston pin 300. Among them, the triggering part 32 is arranged at the second end. By providing the pressing plate 21, the detection rod 2 can better abut against the circlip 200 in the piston pin 300 or the bottom of the piston pin 300, making the detection result more accurate.

[0058] Specifically, a second return spring 22 is provided between the pressing plate 21 and the bottom plate 12 of the support seat 1. By providing the second return spring 22, when the pressing plate 21 disengages from the circlip 200 in the piston pin 300 or the bottom of the piston pin 300, the second return spring 22 can push the pressing rod to drive the detection rod 2 to reset, with a simple structure and convenient operation.

[0059] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention under the inventive concept of the present invention, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A piston pin snap ring assembly detection device, which is used in the assembly process of the snap ring and the piston pin, and is characterized in that, The piston pin circlip assembly detection device includes: A support base, which is used for detachably installing on the top of the piston pin. The support base is formed with a plurality of detection positions in the up and down directions. A detection rod is provided on the support base, and the detection rod can move up and down so that when one end of it moves into the piston pin and abuts against the circlip inside the piston pin or the bottom of the piston pin, the other end of it can move to the corresponding detection position; and A detection component, including a plurality of induction parts provided on the support base and a trigger part provided at the other end of the detection rod. The plurality of induction parts are arranged corresponding to the plurality of detection positions, so that when the other end of the detection rod moves to the corresponding detection position, it can be triggered by the trigger part at the other end of the detection rod and generate an induction signal. The plurality of induction signals of the plurality of induction parts are used to respectively correspond to a plurality of different assembly states of the circlip; The support base has an installation cavity; The detection rod is arranged in the installation cavity, and one end of it is used to move up and down and penetrate through the bottom plate of the support base and extend into the piston pin; The trigger part is arranged at the other end of the detection rod; The plurality of detection positions are formed on the inner wall of the installation cavity. Correspondingly, the induction parts at each detection position are arranged on the inner wall of the installation cavity; The installation cavity has a first side wall and a second side wall arranged oppositely; The plurality of detection positions include a first detection position, a second detection position and a third detection position. The first detection position is formed on the first side wall, the second detection position is formed on the second side wall and is above the first detection position, and the third detection position is formed on the top wall of the installation cavity; Three induction parts are provided. The three induction parts are respectively arranged corresponding to the first detection position, the second detection position and the third detection position, so that they can be triggered by the trigger part and generate a first induction signal, a second induction signal and a third induction signal respectively, which are used to respectively correspond to the missing installation state, the qualified state and the misassembly state of the circlip; When the circlip is missing, one end of the detection rod abuts against the bottom of the piston pin, and the other end of the detection rod drives the trigger part to move to the first detection position. The trigger part triggers the induction part at the first detection position to generate a corresponding missing installation induction signal; when the circlip is assembled qualifiedly, one end of the detection rod abuts against the circlip inside the piston pin, and the other end of the detection rod drives the trigger part to move to the second detection position. The trigger part triggers the induction part at the second detection position to generate a corresponding qualified induction signal; when the circlip is assembled unqualifiedly, one end of the detection rod abuts against the circlip inside the piston pin, and the other end of the detection rod drives the trigger part to move to the third detection position. The trigger part triggers the induction part at the third detection position to generate a corresponding misassembly induction signal.

2. The piston pin snap ring assembly detection device according to claim 1, characterized in that, The piston pin circlip assembly detection device further includes a circuit board assembly, and the circuit board assembly forms corresponding current circuits at corresponding positions of each detection position; The detection component includes a plurality of conduction parts arranged on the support base, and each of the conduction parts is correspondingly arranged with each of the detection positions and is on the corresponding current loop; The detection rod is electrically connected to the circuit board assembly, so that when the other end of the detection rod moves to the corresponding detection position, the triggering part on the other end of the detection rod can contact the corresponding conduction part and make the corresponding current loop conduct, so as to generate a corresponding conduction current signal; Among them, the plurality of induction parts include the plurality of conduction parts; The induction signal includes the conduction current signal.

3. The piston pin circlip assembly detection device according to claim 2, wherein, Each of the conduction parts includes conduction contacts arranged at intervals and detection probes. The conduction contacts are arranged corresponding to the tails of the detection probes, and the detection probes are movably arranged so as to be able to move to make the tails thereof contact and conduct with the conduction contacts; On the movement stroke of the detection rod, the triggering part at the other end of the detection rod can move to abut against the head of the detection probe and push the detection probe to move so that the tail of the detection probe moves to contact and conduct with the conduction contact, so as to make the current loop conduct.

4. The piston pin circlip assembly detection device according to claim 3, characterized in that, A conduction bump is arranged at the other end of the detection rod, and the side part of the conduction bump protrudes outward from the side part of the detection rod, so that when the other end of the detection rod moves to the corresponding detection position, the side part of the conduction bump can abut against the head of the detection probe and push the detection probe to move; Among them, the triggering part includes the conduction bump.

5. The piston pin circlip assembly detection device according to claim 3, wherein, A stop bump is arranged on the circumferential side of the detection probe and near its head; A first return spring is sleeved outside the detection probe, and the first return spring is between the stop bump and the support base.

6. The piston pin circlip assembly detection device according to claim 2, wherein, The piston pin circlip assembly detection device further includes: An indication component, including a plurality of indicator lights electrically connected to the circuit board assembly, and each of the indicator lights is respectively on each of the current loops; and, A controller, electrically connected to the circuit board assembly, so as to control the indicator light on the corresponding current loop to turn on when the current loop conducts and generates a corresponding conduction current signal.

7. The piston pin circlip assembly detection device according to claim 1, characterized in that, The detection rod has a first end and a second end arranged oppositely. The first end includes an end body and a pressing plate arranged on the end body. The pressing plate is used to abut against the circlip in the piston pin or the bottom of the piston pin; Among them, the triggering part is arranged at the second end.

8. The piston pin circlip assembly detection device according to claim 7, characterized in that A second return spring is arranged between the pressing plate and the bottom plate of the support base.

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