Engine piston snap ring assembling equipment
By designing an engine piston retaining ring assembly device, and utilizing an electric push rod and gear rack structure to achieve synchronous installation of the retaining ring, the problem of piston pin displacement caused by piston rollover was solved, and the installation efficiency was improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-26
- Publication Date
- 2026-03-10
AI Technical Summary
In existing technologies, the piston pin displacement is caused by the need to repeatedly flip the piston during the installation of the piston retainer ring, resulting in excessively long installation time.
An engine piston retaining ring assembly device was designed, including a base, an adjustment component, a support seat, a snap-fit component, and an assembly component. The retaining ring is installed synchronously through an electric push rod and a gear and rack structure, ensuring the stable fixation of the piston pin.
This allows for the synchronous installation of the retaining ring, reduces piston pin displacement during piston rotation, and improves installation efficiency.
Smart Images

Figure CN223981424U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of piston assembly technology, and in particular to an engine piston retaining ring assembly device. Background Technology
[0002] The piston is a moving part in the cylinder of a car engine, which usually reciprocates. The piston is also one of the important components of a car engine. By bearing the pressure of combustion gases, the piston transmits the pressure to the connecting rod, causing the crankshaft to rotate and output power, so that the engine works.
[0003] A piston typically consists of a piston crown, piston head, and piston skirt. The piston is connected to the connecting rod via a piston pin. The connection between the piston pin and the piston is secured by a piston retainer. The piston retainer installation device typically consists of a piston mounting base, a retainer delivery pipe, and a pressure rod. The piston is fixed by the piston mounting base, the retainer delivery pipe pushes the retainer above the piston pin, and finally the pressure rod presses the retainer into the groove at the piston pin, thereby fixing the piston pin.
[0004] However, in practice, single-sided piston ring installation is often used. The piston ring installation device first fixes one side of the piston pin. After fixing, the piston is flipped over, and then the piston pin on the other side is fixed. This installation method requires repeated operation to achieve complete fixation of the piston pin. However, during the piston flipping process, the position of the piston pin is prone to displacement, and the piston pin needs to be reset before the piston ring installation can continue. This leads to a long operation time. To address this issue, an engine piston ring assembly device is proposed to solve the above problems. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides an engine piston retaining ring assembly device, which aims to improve the problem in the prior art where the piston pin is displaced due to piston flipping during piston retaining ring installation, resulting in excessively long installation time.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] An engine piston retaining ring assembly device includes a base with a placement groove inside. An adjustment component is installed in the middle of the base, a support base is installed at the bottom of the adjustment component, a buckle component is installed on the outside of the support base, an upper horizontal plate and a lower horizontal plate are installed on the outside of the adjustment component, and an assembly component is installed in the middle of both the upper and lower horizontal plates.
[0008] The assembly includes a second outer shell, which is fixedly connected to the middle of the lower horizontal plate. An electric push rod is fixedly connected to the bottom of the second outer shell. A discharge port is opened at the top of the second outer shell. A connecting pipe is fixedly connected to the outside of the second outer shell. The other end of the connecting pipe is fixedly connected to the first outer shell. An electric push rod is fixedly connected to the bottom of the first outer shell. A feed port is opened at the top of the first outer shell.
[0009] As a further description of the above technical solution:
[0010] The adjustment assembly includes a support column, which is slidably connected to the middle of the support base. A rotating shaft is rotatably connected inside the support column, and a gear is fixedly connected to the outside of the rotating shaft. Racks are fixedly connected to the outside of both the upper and lower horizontal plates, and the gears and racks mesh with each other.
[0011] As a further description of the above technical solution:
[0012] The rack is fixedly connected to the outer side of the push rod two, and a button is fixedly connected to the other end of the push rod two. A spring is sleeved on the outer side of the push rod two.
[0013] As a further description of the above technical solution:
[0014] A pressure block is fixedly connected to the middle part of the push rod 2, and the pressure block is fixedly connected to one end of the spring;
[0015] As a further description of the above technical solution:
[0016] The buckle assembly includes a buckle seat, which is fixedly connected to the outside of the support base. A pull rod is slidably connected inside the buckle seat. A spring is sleeved on the outside of the pull rod. Positioning holes are opened on the outside of both the support base and the support column. The positioning holes and the pull rod are engaged with each other.
[0017] As a further description of the above technical solution:
[0018] A support block is fixedly connected to the outside of the support base, and a pull ring is fixedly connected to the end of the pull rod;
[0019] As a further description of the above technical solution:
[0020] A fixed base is fixedly connected to the outer side of the outer shell, and a push rod is slidably connected to the middle of the fixed base;
[0021] As a further description of the above technical solution:
[0022] A ratchet is fixedly connected to the top of the output end of the electric push rod one, and a top block is fixedly connected to the output end of the electric push rod two.
[0023] This utility model has the following beneficial effects:
[0024] 1. In this utility model, with the cooperation of structures such as outer shell one, outer shell two, electric push rod one, electric push rod two, connecting pipe, feed port, discharge port, fixed seat, and push rod one, the storage, conveying and installation processes of the retaining ring are realized.
[0025] 2. In this utility model, with the cooperation of the button, push rod two, pressure block, spring one, rack, gear, rotating shaft and other structures, the upper horizontal plate and the lower horizontal plate can move towards the base and away from each other at the same time, so that the retaining ring can be installed at the same time. Attached Figure Description
[0026] Figure 1 This is a three-dimensional schematic diagram of an engine piston retaining ring assembly device proposed in this utility model;
[0027] Figure 2 This is a cross-sectional structural diagram of a support column for an engine piston retaining ring assembly device proposed in this utility model.
[0028] Figure 3 This is a cross-sectional structural diagram of the outer shell of an engine piston retaining ring assembly device proposed in this utility model.
[0029] Figure 4 This is a schematic diagram of the support base for an engine piston circlip assembly device proposed in this utility model;
[0030] Figure 5 for Figure 2 Enlarged diagram of point A in the middle.
[0031] Legend:
[0032] 1. Base; 2. Support column; 3. Support seat; 4. Support block; 5. Upper horizontal plate; 6. Lower horizontal plate; 7. Placement slot; 8. Card seat; 9. Button; 10. Electric push rod one; 11. Feed port; 12. Push rod one; 13. Outer shell one; 14. Discharge port; 15. Electric push rod two; 16. Connecting pipe; 17. Pressure block; 18. Push rod two; 19. Spring one; 20. Fixed seat; 21. Top block; 22. Outer shell two; 23. Pawl; 24. Pull rod; 25. Positioning hole; 26. Spring two; 27. Pull ring; 28. Rotating shaft; 29. Gear; 30. Rack. Detailed Implementation
[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0034] Reference Figure 1 and Figure 3This utility model provides an embodiment of an engine piston retaining ring assembly device, including a base 1. The base 1 has a placement groove 7 inside, into which the piston is placed and fixed, facilitating subsequent installation of the retaining ring. An adjustment component is installed in the middle of the base 1, controlling the upper horizontal plate 5 and the lower horizontal plate 6 to move simultaneously into the placement groove 7 for retaining ring installation. A support base 3 is installed at the bottom of the adjustment component, supporting the support column 2 to ensure stable operation without shaking. A buckle component is installed on the outside of the support base 3, used for height adjustment and subsequent fixing of the entire device. An upper horizontal plate 5 and a lower horizontal plate 6 are installed on the outer side of the assembly. The upper horizontal plate 5 and the lower horizontal plate 6 drive the installation assembly to move, allowing the installation assembly to better install the retaining ring. Assembly components are installed in the middle of both the upper horizontal plate 5 and the lower horizontal plate 6. The process of feeding and installing the retaining ring is carried out through the installation components. The assembly components include a second outer shell 22, which is fixedly connected to the middle of the lower horizontal plate 6. The second outer shell 22 positions the retaining ring to prevent its position from shifting and causing installation obstruction. An electric push rod 10 is fixedly connected to the bottom of the second outer shell 22. The electric push rod 10 pushes the retaining ring out of the second outer shell 22, allowing it to be installed into the piston pin groove. The output end of the electric push rod 10... A pawl 23 is fixedly connected to the top, which limits the retaining ring to prevent misalignment and presses it into the piston pin groove, thus completing the installation of the retaining ring. A discharge port 14 is opened at the top of the second outer casing 22, through which the retaining ring is delivered, thus achieving the installation of the retaining ring. A connecting pipe 16 is fixedly connected to the outside of the second outer casing 22, through which the retaining ring is transported from the first outer casing 13 to the second outer casing 22, allowing the retaining ring to enter the installation stage. The other end of the connecting pipe 16 is fixedly connected to the first outer casing 13, which limits the retaining ring, ensuring that the notch positions of the retaining rings are aligned, improving the aesthetics of the installation. An electric push rod 25 is fixedly connected to the bottom of the first outer casing 13, which is used for electric push... A top block 21 is fixedly connected to the output end of rod 2 15. The top block 21 is pushed upward by electric push rod 2 15, thereby pushing the retaining ring upward to the connecting pipe 21. The top of the outer shell 1 13 has a feed port 11. The retaining ring enters the interior of the outer shell 1 13 through the feed port 11, completing the storage and limiting of the retaining ring. A fixed seat 20 is fixedly connected to the outside of the outer shell 1 13. A push rod 12 is slidably connected to the middle of the fixed seat 20. The fixed seat 20 fixes the push rod 12 so that it can work stably. The push rod 12 transports the retaining ring from the connecting pipe 21 to the outer shell 2 22. Through the mutual cooperation of the various structures of the assembly components, the storage, limiting, transportation and installation process of the retaining ring is completed.
[0035] Reference Figure 1 , Figure 2 and Figure 5The adjustment assembly includes a support column 2, which supports the upper horizontal plate 5 and the lower horizontal plate 6, ensuring stable operation and facilitating the installation of the retaining ring. The support column 2 is slidably connected to the middle of the support base 3, which supports the support column 2 to prevent wobbling and stably support the upper horizontal plate 5 and the lower horizontal plate 6. A rotating shaft 28 is rotatably connected inside the support column 2, and a gear 29 is fixedly connected to the outside of the rotating shaft 28, fixing the gear and preventing displacement during operation for greater stability. Racks 30 are fixedly connected to the outside of both the upper horizontal plate 5 and the lower horizontal plate 6, driving the upper horizontal plate 5 and the lower horizontal plate 6 to move, achieving precise installation of the retaining ring. The gear 29 and the rack 30 mesh with each other, causing the rack 30 to drive the gear 29 to rotate, thus simultaneously moving the upper horizontal plate 5 and the lower horizontal plate 6. The base 1 moves, and a push rod 18 is fixedly connected to the outer side of the rack 30. A button 9 is fixedly connected to the other end of the push rod 18. Pressing the button 9 pushes the push rod 18 to move, which in turn pushes the rack 30 to move, thereby driving the gear 29 to rotate and causing the other rack 30 to move simultaneously. This allows the upper horizontal plate 5 and the lower horizontal plate 6 to move towards the base 1 at the same time. A spring 19 is sleeved on the outer side of the push rod 18. The spring 19 rebounds and pushes the push rod 18 back to its original position, thereby causing the rack 30 to move and the upper horizontal plate 5 and the lower horizontal plate 6 to move away from the base 1 at the same time. A pressure block 17 is fixedly connected to the middle of the push rod 18. The pressure block 17 is fixedly connected to the end of the spring 19. The pressure block 17 causes the spring 19 to deform. The spring 19 rebounds and pushes the pressure block 17 to move upward, causing the push rod 18 to return to its original position. By adjusting the breathing coordination of the various structures of the components, the effect of the upper horizontal plate 5 and the lower horizontal plate 6 moving towards and away from the base 1 at the same time can be achieved.
[0036] Reference Figure 1 and Figure 4 The buckle assembly includes a buckle seat 8, which is fixedly connected to the outside of the support base 3. A pull rod 24 is slidably connected inside the buckle seat 8. The buckle seat 8 limits the pull rod 24, allowing it to work stably and without deviation during operation. A spring 26 is sleeved on the outside of the pull rod 24. The deformation of the spring 26 allows the pull rod 24 to achieve a reset effect. Positioning holes 25 are opened on the outside of both the support base 3 and the support column 2. The positioning holes 25 and the pull rod 24 are engaged with each other. The height adjustment effect of the support column 2 is achieved by the cooperation of the positioning holes 25 and the pull rod 24. A pull ring 27 is fixedly connected to the end of the pull rod 24. Pulling the pull ring 27 moves the pull rod 24. A support block 4 is fixedly connected to the outside of the support base 3. The support block 4 allows the support base 3 to stably support the support column 2 during operation.
[0037] Working principle: In use, the retaining ring is placed in the outer casing 13. The retaining ring is raised by the electric push rod 15, and then the push rod 12 is pushed to transport the retaining ring through the connecting pipe 16 to the outer casing 22. The piston is then placed in the placement slot 7, and the button 9 is pressed to push the push rod 18 downwards, thereby pushing the rack 30 to slide downwards in the support column 2. This drives the gear 29 to rotate, which in turn drives the other rack 30 to slide upwards. This causes the upper horizontal plate 5 and the lower horizontal plate 6 to move towards the center simultaneously, thus... When the feed port 14 is connected to the piston pin, the electric push rod 10 and the pawl 23 work together to deliver the retaining ring to the piston pin slot, thus continuing to fix the piston pin. When it is necessary to adjust the overall height, the pull rod 24 can be pulled to disengage it from the positioning hole 25 and contact the limit. At this time, the support column 2 is moved upward to the appropriate position, the pull rod 24 is released, and the spring 26 resets the pull rod 24, so that the pull rod 24 and the positioning hole 25 are engaged to fix the support column 2 and the support base 3, thus completing the height adjustment.
[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. An engine piston snap ring assembly apparatus comprising a base (1) characterised in that: The base (1) is internally provided with a placing groove (7), the base (1) is provided with an adjusting assembly in the middle, the adjusting assembly is provided with a supporting seat (3) at the bottom, the supporting seat (3) is provided with a buckle assembly on the outside, the adjusting assembly is provided with an upper horizontal plate (5) and a lower horizontal plate (6) on the outside, the upper horizontal plate (5) and the lower horizontal plate (6) are both provided with an assembling assembly in the middle; The assembling assembly comprises a shell two (22), the shell two (22) is fixedly connected to the middle of the lower horizontal plate (6), the shell two (22) is fixedly connected with an electric push rod one (10) at the bottom, the shell two (22) is provided with a discharge port (14) at the top, the shell two (22) is fixedly connected with a connecting pipe (16) on the outside, the other end of the connecting pipe (16) is fixedly connected with a shell one (13), the shell one (13) is fixedly connected with an electric push rod two (15) at the bottom, and the shell one (13) is provided with an inlet (11) at the top.
2. An engine piston snap ring assembly apparatus as defined in claim 1, wherein: The adjusting assembly comprises a supporting column (2), the supporting column (2) is slidingly connected to the middle of the supporting seat (3), the supporting column (2) is rotatably connected with a rotating shaft (28) in the inside, the rotating shaft (28) is fixedly connected with a gear (29) on the outside, the upper horizontal plate (5) and the lower horizontal plate (6) are both fixedly connected with a rack (30) on the outside, and the gear (29) and the rack (30) are meshed with each other.
3. An engine piston snap ring assembly apparatus as defined in claim 2, wherein: The rack (30) is fixedly connected with a push rod two (18) on the outside, the other end of the push rod two (18) is fixedly connected with a button (9), and the push rod two (18) is sleeved with a spring one (19) on the outside.
4. An engine piston snap ring assembly apparatus as defined in claim 3, wherein: The push rod two (18) is fixedly connected with a pressing block (17) in the middle, and the pressing block (17) is fixedly connected to the end of the spring one (19).
5. An engine piston snap ring assembly apparatus as defined in claim 2, wherein: The buckle assembly comprises a clamping seat (8), the clamping seat (8) is fixedly connected to the outside of the supporting seat (3), the clamping seat (8) is slidingly connected with a pull rod (24) in the inside, the pull rod (24) is sleeved with a spring two (26) on the outside, the supporting seat (3) and the supporting column (2) are both provided with a positioning hole (25) on the outside, and the positioning hole (25) and the pull rod (24) are mutually clamped.
6. An engine piston snap ring assembly apparatus as defined in claim 5, wherein: The supporting seat (3) is fixedly connected with a supporting block (4) on the outside, and the end of the pull rod (24) is fixedly connected with a pull ring (27).
7. An engine piston snap ring assembly apparatus as in claim 1, wherein: The shell one (13) is fixedly connected with a fixing seat (20) on the outside, and the fixing seat (20) is slidingly connected with a push rod one (12) in the middle.
8. An engine piston snap ring assembly apparatus as in claim 1, wherein: The output end of the electric push rod one (10) is fixedly connected with a pawl (23) at the top, and the output end of the electric push rod two (15) is fixedly connected with a top block (21).