A clamp spring quantitative pushing device

Abstract

The utility model belongs to vehicle manufacturing technical field discloses a kind of clamping spring quantitative pusher.Including main body frame, main body frame is provided with placing groove, and the clamping spring in placing groove mutually abuts, and first push rod is slidably installed in one end of placing groove, and first push rod drives clamping spring to move along the length direction of placing groove, and second push rod is slidably installed in the other end of placing groove, and the moving direction of second push rod is perpendicular to first push rod, and the side of placing groove close to second push rod is formed with notch, and second push rod pushes out clamping spring from notch;Solve the quantity error in the process that existing technology staff picks up clamping spring and installs in engine, cannot match the problem of production tempo.

Description

Technical Field

[0001] This utility model relates to the field of vehicle manufacturing technology, and in particular to a snap ring quantitative pushing device. Background Technology

[0002] In the assembly process of core engine components, the power transmission interface between the piston and connecting rod constitutes a critical functional unit. This interface is hinged through a precision cylindrical component—the piston pin. Specifically, the piston pin passes through the pin hole in the piston skirt and the bushing hole at the small end of the connecting rod, forming a floating support structure. When the engine is operating at high speed, the piston assembly is subjected to cyclic alternating loads within the cylinder. Under the combined action of inertial force and combustion pressure, the piston pin is prone to axial micro-displacement. This axial movement can lead to multiple failure risks: firstly, abnormal contact between the piston pin end face and the cylinder wall, resulting in cylinder wall scoring and abnormal wear; secondly, accelerated fatigue failure of the connecting rod small end bushing due to unexpected off-center loading; and thirdly, disruption of the lubricating oil film distribution between the piston pin and the pin hole, inducing adhesive wear.

[0003] To eliminate the aforementioned risks, a reliable displacement constraint mechanism must be established at both ends of the piston pin's axial direction. Current technical solutions employ elastic retaining rings (i.e., snap rings) as the axial positioning element. Their implementation includes three key features: First, a rectangular groove conforming to ISO standards is machined at the end of the piston pin bore, with the groove depth and snap ring wire diameter forming an interference fit; second, a high-carbon steel snap ring, strengthened by heat treatment, is selected, utilizing its elastic restoring force to achieve a self-locking function; finally, the snap ring is pressed into the groove using a specialized assembly tool, making the outer edge of the snap ring flush with the piston's outer surface. When the piston pin is subjected to axial force, the snap ring's annular structure, through mechanical interference with the groove sidewall, forms a bidirectional displacement constraint (i.e., simultaneously restricting the piston pin's movement in both the left and right directions).

[0004] During the assembly of piston circlips, workers need to manually pick up the piston circlips and install them on the piston pins of the engine each time. Because the production line is fast, each worker needs to assemble six sets of piston circlips on the engine at once. This requires the worker to pick up six sets of piston circlips from the holder, which is inefficient and may result in the wrong number of circlips being picked up. This reduces production efficiency and is inconsistent with the assembly efficiency of the production line. Utility Model Content

[0005] The purpose of this invention is to provide a quantitative pushing device for retaining rings, which solves the problem of quantity errors that occur when workers pick up retaining rings and install them on the engine, and the inability to match the production cycle.

[0006] To achieve this objective, the present invention adopts the following technical solution: The present invention provides a spring clip quantitative pushing device, including a main frame, on which a placement groove is provided, and spring clips in the placement groove abut against each other. A first push rod is slidably installed at one end of the placement groove, and the first push rod pushes the spring clip to move along the length direction of the placement groove. A second push rod is slidably installed at the other end of the placement groove, and the second push rod is perpendicular to the moving direction of the first push rod. A notch is formed on the side of the placement groove near the second push rod, and the second push rod pushes the spring clip out from the notch.

[0007] Preferably, a first connecting rope is installed on the side of the first push rod away from the retaining ring, and a counterweight is installed on the first connecting rope. The counterweight is on the side away from the notch, and the weight of the counterweight is greater than the weight of the first push rod. A first pulley is installed on the main frame on the side close to the notch, and the middle section of the first connecting rope is wound around the first pulley.

[0008] Preferably, a positioning rod is installed on the main frame, a fixing rod is slidably sleeved on the positioning rod, a fixing ring is formed at one end of the fixing rod, a positioning post is formed on the side of the first push rod away from the snap ring, and the fixing ring is sleeved in the positioning post.

[0009] Preferably, a spring is installed on the main frame, the second push rod is connected to the spring via the second connecting rope, a third connecting rope is installed on the other end of the second push rod, a pedal is slidably installed on the main frame, the pedal moves vertically and horizontally, and the third connecting rope is connected to the pedal.

[0010] Preferably, a first mounting rod is mounted on the first push rod, and a first sliding sleeve is mounted on the first mounting rod, with the first sliding sleeve sleeved onto the main frame.

[0011] Preferably, a second mounting rod is mounted on the second push rod, and a second sliding sleeve is mounted on the second mounting rod, the second sliding sleeve being sleeved on the main frame.

[0012] Preferably, a push plate is detachably installed at the front end of the second push rod, the push plate abutting against the retaining spring, and the thickness of the push plate is the same as the thickness of the six sets of retaining springs stacked together.

[0013] Preferably, the push plate has an internal thread, the front end of the second push rod has an external thread, and the push plate is screwed onto the second push rod.

[0014] Preferably, the snap ring quantitative pushing device further includes a movable frame, which is U-shaped. A first overlapping beam and a second overlapping beam are respectively provided on both sides of the movable frame. A first U-shaped frame and a second U-shaped frame are respectively formed at both ends of the snap ring. The first U-shaped frame overlaps on the first overlapping beam, and the second U-shaped frame overlaps on the second overlapping beam.

[0015] Preferably, the main frame is provided with a first roller, which abuts against the second push rod.

[0016] Beneficial effects: The second push rod is pushed in from the side of the placement slot. Each time the second push rod can automatically push out a certain amount of retaining rings, eliminating the need for manual counting and reducing production efficiency. After the second push rod is pushed out, the installer can directly take the retaining rings and install them on the movable pin of the engine. The installer does not need to count and confirm the number of retaining rings, improving installation efficiency and keeping up with the pace of the production line. Attached Figure Description

[0017] Figure 1 This is a main drawing of the snap ring quantitative pushing device of this utility model.

[0018] In the diagram: 1. Main frame; 2. First push rod; 3. Placement slot; 4. Snap ring; 5. Second push rod; 6. First connecting rope; 7. Counterweight; 8. Positioning rod; 9. Fixing rod; 10. Fixing ring; 11. Positioning post; 12. Spring; 13. Second connecting rope; 14. Pedal; 15. First mounting rod; 16. First sliding sleeve; 17. Second mounting rod; 18. Second sliding sleeve; 19. Push plate; 20. First roller. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0020] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0023] In the field of precision engine assembly, the reliable connection between the piston and connecting rod is the core link in achieving power transmission. The piston pin, as a critical connecting component, bears the responsibility of transmitting alternating loads under high temperature and high pressure conditions. To ensure the piston pin maintains a stable working state within the pin hole during high-speed engine operation, elastic retaining ring assemblies are installed at both ends of its axial direction to form an effective axial displacement constraint mechanism. This constraint is crucial for preventing unintended movement of the piston pin due to inertial forces or vibration. Once movement occurs, it will lead to abnormal cylinder wall wear, knocking noises, and even structural failure, directly affecting the overall engine's operational safety and durability.

[0024] In the current assembly process commonly used in the industry, the installation of snap rings is highly dependent on manual operation. Specifically, operators must manually sort snap rings one by one from containers of bulk materials at a moving workstation on the production line, and then precisely insert them into the annular groove at the end of the piston pin seat hole. This process has several systemic defects: First, as miniature elastic elements, snap rings are small and have a delicate structure, making manual grasping inherently demanding in terms of operational precision and physical control, especially in continuous operation environments where visual fatigue or weakened tactile feedback can easily lead to grasping failures. Second, because multiple snap rings need to be installed simultaneously in a single assembly, operators must repeatedly perform the cyclical action of "positioning the container - sorting individual pieces - transferring and installing." This discrete operation mode significantly prolongs the cycle time of a single operation, causing a serious mismatch between the assembly rhythm and the overall pace of the automated production line. More importantly, the manual sorting process lacks a rigid quantity control mechanism, relying entirely on the operator's immediate memory and visual judgment, which easily leads to quantity deviations such as missing or over-sorrying under the pressure of high-speed continuous operation. Such assembly errors are characterized by their high degree of concealment and difficulty in online detection. If they flow into subsequent processes, they will trigger a chain of quality risks.

[0025] The aforementioned manual operation mode has become the core bottleneck for improving the quality and efficiency of engine assembly lines. On the one hand, the random stacking of bulk materials makes it impossible for operators to obtain the precise number of snap rings through a single action. The target quantity must be accumulated through multiple sorting actions, which directly results in a large amount of effective assembly time being squeezed out by the material picking process. On the other hand, the inherent fluctuations in attention and randomness of actions in manual operations make it impossible to guarantee the accuracy of quantitative picking.

[0026] Especially in high-capacity engine production lines, where the cycle time is compressed to tens of seconds, the lag effect of the snap ring assembly process is amplified dramatically. To keep up with production line speed, operators are often forced to simplify operating procedures, further increasing the risk of incorrect assembly.

[0027] To solve the above problems, such as Figure 1 As shown, this utility model provides a spring clip quantitative pushing device, including a main frame 1, a placement groove 3 is provided on the main frame 1, spring clips 4 in the placement groove 3 abut against each other, a first push rod 2 is slidably installed at one end of the placement groove 3, the first push rod 2 pushes the spring clips 4 to move along the length direction of the placement groove 3, a second push rod 5 is slidably installed at the other end of the placement groove 3, the second push rod 5 is perpendicular to the moving direction of the first push rod 2, a notch is formed on the side of the placement groove 3 near the second push rod 5, the second push rod 5 pushes the spring clips 4 out of the notch.

[0028] The retaining rings 4 are usually placed side by side in the placement slot 3, with the retaining rings 4 in the placement slot 3 close to each other. The first push rod 2 can press them together in the placement slot 3. The second push rod 5 pushes some of the retaining rings 4 in the placement slot 3 from one side, so that the target number of retaining rings 4 can be moved out from the other side of the placement slot 3. The personnel can directly take the protruding retaining rings 4. Then the first push rod 2 continues to push the retaining rings 4 to the edge of the placement slot 3 near the notch, so that the retaining rings 4 can be pushed out again. There is no need for manual counting of the retaining rings 4. The thickness of the front end of the second push rod 5 does not change, so a fixed number of retaining rings 4 can be pushed out from the placement slot 3 each time. The worker can take out a fixed number of retaining rings 4 each time, which improves the installation efficiency and keeps up with the production rhythm. Since the number pushed out by the second push rod 5 does not change, there will be no problem of taking the wrong number of retaining rings 4, which can improve the installation efficiency of the engine and reduce the number of times the wrong number of retaining rings 4 is taken.

[0029] A first connecting rope 6 is installed on the side of the first push rod 2 away from the retaining spring 4. A counterweight 7 is installed on the first connecting rope 6. The counterweight 7 is on the side away from the notch. The weight of the counterweight 7 is greater than the weight of the first push rod 2. A first pulley is installed on the main frame 1 on the side close to the notch. The middle section of the first connecting rope 6 is wound around the first pulley.

[0030] The snap ring quantitative pushing device of this utility model moves the first push rod 2 by pushing it with a counterweight 7. Since the counterweight 7 is greater than the weight of the first push rod 2, it moves downward by gravity and can replace the electric device, thereby reducing the design cost of the snap ring quantitative pushing device.

[0031] A positioning rod 8 is installed on the main frame 1. A fixing rod 9 is slidably sleeved on the positioning rod 8. A fixing ring 10 is formed at one end of the fixing rod 9. A positioning post 11 is formed on the side of the first push rod 2 away from the snap ring 4. The fixing ring 10 is sleeved in the positioning post 11.

[0032] If the retaining ring 4 is used up, the first push rod 2 will abut against the notch in the placement slot 3. In order to place a new retaining ring 4, the first push rod 2 needs to be fixed in advance. The first push rod 2 can be fixed by the positioning ring on the fixing rod 9. The first push rod 2 is manually moved to the side away from the notch. Then the fixing ring 10 is put on the positioning post 11 so that the first push rod 2 can stop moving and leave space in the placement slot 3 to place the retaining ring 4, so that the worker can put the retaining ring 4 in. After placing the retaining ring 4 in the placement slot 3, the fixing ring 10 is removed from the positioning post 11 so that the first push rod 2 continues to abut against the retaining ring 4, and the retaining ring 4 placed in the placement slot 3 is fixed again so that the second push rod 5 can push the retaining ring 4 out from the side.

[0033] A spring 12 is installed on the main frame 1. The second push rod 5 is connected to the spring 12 through the second connecting rope 13. The other end of the second push rod 5 is installed with a third connecting rope. A pedal 14 is slidably installed on the main frame 1. The pedal 14 moves vertically and horizontally. The third connecting rope is connected to the pedal 14.

[0034] When the pedal 14 is manually pressed, the second push rod 5 is moved by the third connecting rope, so that the second push rod 5 can abut against the side of the retaining spring 4, pushing part of the retaining spring 4 out of the notch for easy manual removal. At this time, the spring 12 is stretched under the pull of the second connecting rope 13. When the pedal 14 is released, the spring 12 will return to its initial state, and then pull the second push rod 5 back to move back, so as to continue pushing the retaining spring 4 next time. By setting the spring 12 to control the second push rod 5 to move back and forth freely, the corresponding number of retaining spring 4 can be taken out from the notch by the operator pressing the pedal 14, so that the operator does not need to count the retaining spring 4, saving preparation time before installation and allowing the production personnel to keep up with the production rhythm.

[0035] A first mounting rod 15 is installed on the first push rod 2, and a first sliding sleeve 16 is installed on the first mounting rod 15. The first sliding sleeve 16 is sleeved on the main frame 1. Typically, the first push rod 2 of the utility model has two sets of first sliding grooves and two sets of first mounting rods 15. During the movement of the first push rod 2, the first sliding sleeve 16 will move along the beam on the main frame 1. The two sets of first mounting rods 15 are respectively placed on both sides of the first push rod 2. This makes the movement of the first push rod 2 more stable under the pull of the first connecting rope 6, so that the first push rod 2 will not shake during the movement.

[0036] A second mounting rod 17 is installed on the second push rod 5, and a second sliding sleeve 18 is installed on the second mounting rod 17. The second sliding sleeve 18 is sleeved on the main frame 1. By sliding the second push rod 5 onto the main frame 1 using the second sliding sleeve 18, the second push rod 5 can be made more stable during movement. Each time, the same number of retaining springs 4 can be pushed out from the side notch, making it easier for the operator to pick up the retaining springs 4 pushed out by the second push rod 5, and ensuring that the operator picks up the same number of retaining springs 4 each time.

[0037] The front end of the second push rod 5 is detachably equipped with a push plate 19, which abuts against the retaining spring 4. The thickness of the push plate 19 is the same as the thickness of the six sets of retaining springs 4 stacked together.

[0038] The push plate 19 of this utility model has a thickness of 11mm, which is the same as the thickness of the 6 sets of retaining springs 4 stacked together. By abutting with the push plate 19, the 6 sets of retaining springs 4 can be pushed out of the notch in the placement groove 3 each time. The push plate 19 can be replaced with different thicknesses, so that different numbers of retaining springs 4 can be pushed out by the second push rod 5 on different production lines, so that the retaining spring quantitative pushing device can adapt to the production lines of different types of engines.

[0039] The push plate 19 of this invention has an internal thread, and the front end of the second push rod 5 has an external thread. The push plate 19 is screwed onto the second push rod 5. By rotating, the push plate 19 is installed on the second push rod 5, reducing the difficulty of replacing the push plate 19 and facilitating the replacement of push plates 19 of different thicknesses.

[0040] The snap ring metering device also includes a movable frame, which is U-shaped. A first overlapping beam and a second overlapping beam are respectively provided on both sides of the movable frame. The snap ring 4 has a first U-shaped frame and a second U-shaped frame formed at both ends. The first U-shaped frame overlaps the first overlapping beam, and the second U-shaped frame overlaps the second overlapping beam. During the placement of the snap ring 4 into the placement slot 3, the movable frame can be fully loaded with snap rings 4 before being placed inside the snap ring 4. Then, after the first push rod 2 abuts against the snap ring 4, the movable frame is pulled out from one side, completing the placement of the snap ring 4 in the placement slot 3.

[0041] The main frame 1 is equipped with a first roller 20, which abuts against the second push rod 5. The second push rod 5 moves back and forth, and the first roller 20 abuts against one side of the second push rod 5, which can make the second push rod 5 more stable during its movement along its own axis.

[0042] The main frame 1 of the snap ring quantitative pushing device of this utility model is assembled together by splicing, which can reduce manufacturing difficulty and cost. At the same time, if the parts are damaged, they can be repaired in time, reducing maintenance costs. The weight of the counterweight 7 can be freely replaced. A connecting rod is installed on the counterweight 7, and a docking rod is installed on the counterweight 7. The weight body is inserted into the docking rod. By adding or subtracting the weight body, the weight of the counterweight 7 can be increased or decreased.

[0043] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A clasp spring dosing pusher device, characterized in that The device includes a main frame (1), on which a placement groove (3) is provided. Snap rings (4) within the placement groove (3) abut against each other. A first push rod (2) is slidably mounted on one end of the placement groove (3), and the first push rod (2) pushes the snap ring (4) to move along the length of the placement groove (3). A second push rod (5) is slidably mounted on the other end of the placement groove (3), and the second push rod (5) is perpendicular to the moving direction of the first push rod (2). A notch is formed on the side of the placement groove (3) near the second push rod (5), and the second push rod (5) pushes the snap ring (4) out of the notch.

2. The clasp dosing pusher device of claim 1, wherein, A first connecting rope (6) is installed on the side of the first push rod (2) away from the snap ring (4). A counterweight (7) is installed on the first connecting rope (6). The counterweight (7) is on the side away from the notch. The weight of the counterweight (7) is greater than the weight of the first push rod (2). A first pulley is installed on the main frame (1) near the notch. The middle section of the first connecting rope (6) is wound around the first pulley.

3. The snap ring quantitative pushing device according to claim 2, characterized in that, A positioning rod (8) is installed on the main frame (1), and a fixing rod (9) is slidably sleeved on the positioning rod (8). A fixing ring (10) is formed at one end of the fixing rod (9). A positioning post (11) is formed on the side of the first push rod (2) away from the snap ring (4), and the fixing ring (10) is sleeved in the positioning post (11).

4. The snap ring quantitative pushing device according to claim 1, characterized in that, A spring (12) is installed on the main frame (1). The second push rod (5) is connected to the spring (12) through a second connecting rope (13). A third connecting rope is installed on the other end of the second push rod (5). A pedal (14) is slidably installed on the main frame (1). The pedal (14) moves vertically and horizontally. The third connecting rope is connected to the pedal (14).

5. The snap ring quantitative pushing device according to claim 1, characterized in that, A first mounting rod (15) is installed on the first push rod (2), and a first sliding sleeve (16) is installed on the first mounting rod (15). The first sliding sleeve (16) is sleeved on the main frame (1).

6. The snap ring quantitative pushing device according to claim 1, characterized in that, A second mounting rod (17) is installed on the second push rod (5), and a second sliding sleeve (18) is installed on the second mounting rod (17). The second sliding sleeve (18) is sleeved on the main frame (1).

7. The snap ring quantitative pushing device according to claim 1, characterized in that, The second push rod (5) has a push plate (19) detachably installed at its front end. The push plate (19) abuts against the snap ring (4). The thickness of the push plate (19) is the same as the thickness of the six snap rings (4) stacked together.

8. The snap ring quantitative pushing device according to claim 7, characterized in that, The push plate (19) has an internal thread, and the front end of the second push rod (5) has an external thread. The push plate (19) is screwed onto the second push rod (5).

9. The snap ring quantitative pushing device according to claim 1, characterized in that, The snap ring quantitative pushing device also includes a movable frame, which is U-shaped. A first overlapping beam and a second overlapping beam are respectively provided on both sides of the movable frame. A first U-shaped frame and a second U-shaped frame are respectively formed at both ends of the snap ring (4). The first U-shaped frame overlaps on the first overlapping beam, and the second U-shaped frame overlaps on the second overlapping beam.

10. The snap ring quantitative pushing device according to claim 1, characterized in that, The main frame (1) is provided with a first roller (20), which abuts against the second push rod (5).

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