Connecting rod for disassembling piston

Abstract

The utility model belongs to the technical field of piston dismounting tools, and particularly relates to a connecting rod for dismounting a piston. A connecting rod for disassembling a piston comprises a supporting base and a connecting rod assembly. The supporting seat is provided with a plurality of fixing holes, and the positions of the fixing holes correspond to screw holes of an outer frame of the crankcase access hole; the connecting rod assembly comprises a connecting rod, an angle-adjustable connecting mechanism and a push-out part; one end of the connecting rod is provided with a hand-held part, and the other end of the connecting rod extends into the access hole of the crankcase, bends upwards, extends to the position below a piston in the crankcase and is hinged to the push-out part; the connecting rod is connected with the supporting base through the angle-adjustable connecting mechanism and used for achieving rotation of the connecting rod relative to the supporting base, and the push-out part exerts upward thrust on the piston. According to the utility model, the downward operating force applied to the handheld part is converted into the vertical upward thrust of the push-out part to the piston by utilizing the lever principle, so that the piston can be simply and efficiently dismantled.

Description

Technical Field

[0001] This utility model belongs to the technical field of piston disassembly tools, specifically relating to connecting rods used for disassembling pistons. Background Technology

[0002] The piston is a reciprocating component in the cylinder block of a car engine. It plays a crucial role during engine startup, bearing gas pressure and driving the crankshaft to rotate via the connecting rod and piston pin. As a core component of the car engine, the piston's testing and evaluation requirements are becoming increasingly stringent. However, due to limitations in piston structural design, removing the piston during testing is difficult, easily leading to damage such as dropping or impacts. This severely impacts piston reusability and even hinders product development progress.

[0003] Traditionally, piston removal involves an operator reaching under the piston in the crankcase and using a wooden stick or similar tool to push it upwards from the cylinder. However, since the piston is vertically mounted in the crankcase, and the crankcase access port is usually horizontal, extending under the piston, this traditional method of manually reaching under the piston through the access port is extremely unsafe, labor-intensive, and the force applied during piston removal varies from person to person, making it difficult to control and potentially damaging the piston. This is especially true when the piston seizes up, becoming stuck inside the cylinder, making removal very difficult. Furthermore, insufficient protective force during removal poses a safety hazard to the operator and complicates the process.

[0004] Therefore, it is urgent to develop and design a connecting rod for disassembling the piston in order to solve the above problems. Utility Model Content

[0005] This invention addresses the technical problems existing in the prior art by providing a connecting rod for disassembling a piston, which enables simple and efficient piston removal.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0007] A connecting rod for disassembling a piston, comprising:

[0008] The support base has several fixing holes, the positions of which correspond to the screw holes on the outer frame of the crankcase access port, for fixing the support base to the outer frame of the crankcase access port;

[0009] The linkage assembly includes a linkage, an adjustable angle connection mechanism, and an extension part;

[0010] The connecting rod has a hand-held part at one end and extends upward from the crankcase inspection port at the other end, and is hinged to the adjustment plate. The adjustment plate extends to the piston inside the crankcase and has the push-out part.

[0011] The connecting rod is connected to the support base via the adjustable angle connecting mechanism, which enables the connecting rod to rotate relative to the support base, and the ejector applies an upward thrust to the piston.

[0012] Based on the above technical solution, the present invention can be further improved as follows.

[0013] Furthermore, the adjustable angle connection mechanism includes:

[0014] A first connecting plate, one end of which is connected to the connecting rod by a first bolt;

[0015] The second connecting plate has one end connected to the support base by a second bolt and the other end connected to the first connecting plate by a third bolt;

[0016] When the first bolt is not tightened, the connecting rod can rotate relative to the support base.

[0017] Furthermore, it also includes a first fixing plate and a second fixing plate;

[0018] The first fixing plate is provided with a first positioning hole that matches the mounting hole on the side of the upper bearing bush. The first fixing plate is detachably connected to the support base by a first fixing bolt. After the first fixing plate is disassembled, it can be installed on the side of the upper bearing bush by the first fixing bolt.

[0019] The second fixing plate is provided with a second positioning hole that matches the mounting hole on the other side of the upper bearing bush. The second fixing plate is detachably connected to the support base by a second fixing bolt. After the second fixing plate is disassembled, it can be installed on the other side of the upper bearing bush by the second fixing bolt.

[0020] Furthermore, the connecting rod is eccentrically connected to the support seat via an adjustable angle connection mechanism. After the connecting rod extends from the crankcase inspection port, it bends upward and extends to below the piston, so that the ejection part is located directly below the mounting hole on either side of the upper bearing.

[0021] Furthermore, the fixing hole is a threaded hole and is equipped with a fixing adjustment handwheel or fastening bolt for fixing the support to the outer frame of the crankcase inspection port.

[0022] Furthermore, the connecting rod is hinged to the adjusting plate via a hinge.

[0023] Furthermore, the ejector part uses a flat-head knurled hand-tightening screw.

[0024] Furthermore, the handheld part is equipped with a spring-loaded stop pin, which is vertically connected to the end of the connecting rod.

[0025] Furthermore, the support base is inverted U-shaped, matching the upper half of the outer frame of the crankcase access port, and has a fixing hole on each of the left and right sides, the position of which corresponds to the screw holes on both sides of the outer frame of the crankcase access port, for fixing the support base to the outer frame of the crankcase access port.

[0026] The beneficial effects of this utility model are:

[0027] 1. The rigid connection between the support base and the crankcase access port outer frame provides a stable force reference for the connecting rod assembly. Combined with the structural design of the connecting rod extending upward after entering the crankcase access port, it directly adapts to the vertically installed piston space layout inside the crankcase, ensuring that the ejector part accurately abuts the bottom of the piston. Through the adjustable angle connection mechanism, the operator only needs to loosen the first bolt to adjust the relative angle between the rod body and the support base. Utilizing the lever principle, the downward operating force applied to the hand is converted into a vertical upward thrust of the ejector part on the piston. This not only solves the problem of spatial adaptation between the horizontal inlet of the crankcase access port and the vertical piston inside the crankcase, but also achieves efficient conversion of the thrust direction, significantly improving disassembly efficiency and operational safety.

[0028] 2. This utility model uses a three-stage bolt design with double connecting plates. When the first bolt (the bolt connecting the first connecting plate and the connecting rod) is loosened, the connecting rod can rotate freely relative to the support seat, quickly adjusting the insertion angle to adapt to the internal structure of the crankcase. At the same time, the lever effect is used to convert the downward force applied by the operator into a vertically upward piston thrust, causing the upper part of the piston to push out. The operation is simple and the practicality is strong. Attached Figure Description

[0029] Figure 1 This is a side view of the connecting rod for disassembling the piston as described in an embodiment of the present invention;

[0030] Figure 2 This is a top view of the connecting rod for disassembling the piston as described in an embodiment of the present invention;

[0031] Figure 3 This is a front view of the connecting rod for disassembling the piston as described in an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the structure where the lower part of the engine connecting rod is separated from the upper bearing bush according to an embodiment of the present invention.

[0033] The attached diagram lists the components represented by each number as follows:

[0034] 1. Connecting rod; 2. Support base; 3. Second connecting plate; 4. First connecting plate; 5. Adjusting plate; 6. Fixed adjusting handwheel; 7. First fixing plate; 8. Second fixing plate; 9. Hinge; 10. Flat-head knurled hand screw; 11. Spring stop pin; 12. Hex bolt; 13. Washer; 14. Lock nut; 15. Cylindrical head socket head cap screw; 16. Knurled socket head cap screw; 17. Internal / external thread conversion nut; 18. Mounting hole on one side of the upper bearing shell; 19. Mounting hole on the other side of the upper bearing shell. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0037] In the description of this application, the term "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to implement and use the present invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the present invention can be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the present invention with unnecessary detail. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0038] Example

[0039] A connecting rod for disassembling a piston, such as Figure 1-3 As shown, it includes a support base 2 and a connecting rod 1 assembly.

[0040] The support base 2 is inverted U-shaped and matches the upper half of the outer frame of the crankcase access port. It has a fixing hole on each of its left and right sides, corresponding to the screw holes on both sides of the outer frame of the crankcase access port, for fixing the support base 2 to the outer frame. The fixing holes are threaded and equipped with a fixing and adjusting handwheel 6 for securing the support base 2 to the outer frame of the crankcase access port. The fixing and adjusting handwheel 6 allows for quick installation and removal of the support base 2, and also allows for fine-tuning to enhance the fit between the support base 2 and the outer frame of the crankcase access port, preventing loosening during operation.

[0041] The connecting rod 1 assembly includes a connecting rod 1, an adjustable angle connecting mechanism, and an extension part;

[0042] The connecting rod 1 has a handle at one end and extends upward from the crankcase inspection port at the other end, bending upward and hinged to the adjusting plate 5 via a hinge 9. The adjusting plate 5 extends to below the piston inside the crankcase and has a push-out part for applying thrust to the piston. The push-out part is made of a flat-head knurled hand-tightening screw 10. The hinge ensures that the push-out part has a certain degree of freedom of movement and that it fits snugly against the part below the piston. The connecting rod 1 and the adjusting plate 5 are fixed to both sides of the hinge 9 by cylindrical head hexagonal screws 15, forming a hinge connection via the hinge 9.

[0043] The connecting rod 1 is connected to the support base 2 through the adjustable angle connecting mechanism, which is used to realize the rotation of the connecting rod 1 relative to the support base 2, and the pushing part applies an upward thrust to the piston.

[0044] In a preferred embodiment, the adjustable angle connection mechanism includes:

[0045] The first connecting plate 4 is connected to the connecting rod 1 at one end by the first bolt;

[0046] The second connecting plate 3 is connected to the support base 2 at one end by a second bolt, and to the first connecting plate 4 at the other end by a third bolt.

[0047] When the first bolt is not tightened, the connecting rod 1 can rotate relative to the support base 2.

[0048] Specifically, the first bolt, the second bolt, and the third bolt are all hexagonal bolts 12; one end of the first connecting plate 4 is connected to the connecting rod 1 via hexagonal bolts 12, locking nuts 14, and washers 13; one end of the second connecting plate 3 is connected to the support base 2 via hexagonal bolts 12, locking nuts 14, and washers 13, and the other end is connected to the first connecting plate 4 via hexagonal bolts 12, locking nuts 14, and washers 13.

[0049] In a preferred embodiment, it further includes a first fixing plate 7 and a second fixing plate 8;

[0050] The first fixing plate 7 is provided with a first positioning hole that matches the mounting hole 18 on the side of the upper bearing bush. The first fixing plate 7 is detachably connected to the support base 2 by the first fixing bolt. After the first fixing plate 7 is disassembled, it can be installed on the side of the upper bearing bush by the first fixing bolt.

[0051] The second fixing plate 8 is provided with a second positioning hole that matches the mounting hole 19 on the other side of the upper bearing bush. The second fixing plate 8 is detachably connected to the support base 2 by the second fixing bolt. After the second fixing plate 8 is disassembled, it can be installed on the other side of the upper bearing bush by the second fixing bolt.

[0052] The first fixing plate 7 and the second fixing plate 8 are respectively installed on both sides of the upper bearing bush, which can prevent the upper bearing bush from falling off, and at the same time provide the action point for the ejection part to avoid damage to the upper bearing bush.

[0053] Specifically, both the first fixing bolt and the second fixing bolt are knurled hexagon socket head cap screws 16 and internal / external thread conversion nuts 17. The first fixing plate 7 is detachably connected to the support base 2 by the knurled hexagon socket head cap screws 16 and internal / external thread conversion nuts 17. The second fixing plate 8 is detachably connected to the support base 2 by the knurled hexagon socket head cap screws 16 and internal / external thread conversion nuts 17.

[0054] The connecting rod 1 is eccentrically connected to the support base 2 via an adjustable angle connection mechanism. The connecting rod 1 extends from the crankcase access port, bends upward, and extends below the piston, positioning the ejection portion directly below the mounting hole 18 on the upper bearing side. This eccentric connection of the connecting rod 1 to the support base 2, combined with its upward bending extension path, ensures the ejection portion is directly below the mounting hole 18 on the upper bearing side, ensuring the thrust acts perpendicularly to the piston axis, reducing lateral force wear on the piston surface, and facilitating smooth ejection.

[0055] In a preferred embodiment, the handle uses a spring-loaded stop pin 11, which is vertically connected to the end of the connecting rod 1. The spring-loaded stop pin 11 allows for quick insertion and removal of the handle through spring loading, preventing accidental detachment during operation. Furthermore, the vertical connection design is ergonomic, facilitating grip and force application.

[0056] The working process of this utility model includes:

[0057] 1. Pre-fix the upper bearing: Before disassembling the piston, if... Figure 4As shown, the lower part of the engine connecting rod 1 is separated from the upper bearing shell; the first fixing plate 7, the second fixing plate 8 and their fixing bolts are removed from the support seat 2; the first fixing plate 7 is installed to the mounting hole 18 on one side of the upper bearing shell through the first fixing bolt, and the second fixing plate 8 is installed to the mounting hole on the other side of the bearing shell through the second fixing bolt, forming a temporary support structure to prevent the upper bearing shell from falling off when the piston is disassembled;

[0058] 2. Install support seat 2: Loosen the first bolt of the adjustable angle connecting mechanism so that the connecting rod 1 can rotate relative to the support seat 2; insert the connecting rod 1 into the crankcase access port, so that the extension part is located directly below the first fixed plate 7 or the second fixed plate 8; then align the support seat 2 with the outer frame of the crankcase access port; by fixing the adjusting handwheel 6, use the fixing holes on both sides of the support seat 2 to align and connect with the screw holes on both sides of the outer frame of the crankcase access port, ensuring that the support seat 2 is aligned with the outer frame of the crankcase access port.

[0059] 3. Piston ejection operation: Hold the spring stop pin 11 handle and apply a downward force. The rod rotates around the first bolt fulcrum, pushing the ejection part to generate a vertical upward thrust on the bottom of the piston. Through the connecting rod 1 rotating around the support seat 2, with the first bolt as the fulcrum, a lever effect is formed. The ejection part generates an upward thrust that acts on the bottom of the piston, causing the piston to eject from the cylinder liner.

[0060] 4. Disassemble connecting rod 1 assembly: Loosen the first bolt, remove the support seat 2 from the crankcase inspection port, and remove the connecting rod 1 from the crankcase inspection port.

[0061] While embodiments or examples of this disclosure have been described with reference to the accompanying drawings, it should be understood that the methods, systems, and devices described above are merely exemplary embodiments or examples, and the scope of this utility model is not limited by these embodiments or examples, but only by the granted claims and their equivalents. Various elements in the embodiments or examples may be omitted or replaced by their equivalents. Furthermore, the steps may be performed in a different order than that described in this disclosure. Further, various elements in the embodiments or examples may be combined in various ways. Importantly, as technology evolves, many elements described herein can be replaced by equivalents that appear after this disclosure.

Claims

1. A connecting rod for disassembling a piston, characterized in that, include: The support base has several fixing holes, the positions of which correspond to the screw holes on the outer frame of the crankcase access port, for fixing the support base to the outer frame of the crankcase access port; The linkage assembly includes a linkage, an adjustable angle connection mechanism, and an extension part; The connecting rod has a hand-held part at one end and extends upward from the crankcase inspection port at the other end, and is hinged to the adjustment plate. The adjustment plate extends to the piston inside the crankcase and has the push-out part. The connecting rod is connected to the support base via the adjustable angle connecting mechanism, which enables the connecting rod to rotate relative to the support base, and the ejector applies an upward thrust to the piston.

2. A connecting rod for a disassembled piston according to claim 1, characterized in that, The adjustable angle connection mechanism includes: A first connecting plate, one end of which is connected to the connecting rod by a first bolt; The second connecting plate has one end connected to the support base by a second bolt and the other end connected to the first connecting plate by a third bolt; When the first bolt is not tightened, the connecting rod can rotate relative to the support base.

3. The connecting rod for a disassembled piston according to claim 1, characterized in that, It also includes a first fixing plate and a second fixing plate; The first fixing plate is provided with a first positioning hole that matches the mounting hole on the side of the upper bearing bush. The first fixing plate is detachably connected to the support base by a first fixing bolt. After the first fixing plate is disassembled, it can be installed on the side of the upper bearing bush by the first fixing bolt. The second fixing plate is provided with a second positioning hole that matches the mounting hole on the other side of the upper bearing bush. The second fixing plate is detachably connected to the support base by a second fixing bolt. After the second fixing plate is disassembled, it can be installed on the other side of the upper bearing bush by the second fixing bolt.

4. The connecting rod for a disassembled piston according to claim 3, characterized in that, The connecting rod is eccentrically connected to the support seat via an adjustable angle connection mechanism. After the connecting rod extends from the crankcase inspection port, it bends upward and extends to below the piston, so that the ejection part is located directly below the mounting hole on either side of the upper bearing.

5. The connecting rod for a disassembled piston according to claim 1, characterized in that, The fixing hole is a threaded hole and is equipped with a fixing adjustment handwheel or fastening bolt, which is used to fix the support to the outer frame of the crankcase inspection port.

6. The connecting rod for disassembling the piston according to claim 1 or 4, characterized in that, The connecting rod is hinged to the adjusting plate.

7. A connecting rod for a disassembled piston according to claim 6, characterized in that The ejector section uses flat-head knurled hand-tightening screws.

8. The connecting rod for a disassembled piston according to claim 1, characterized in that, The handheld part is equipped with a spring-loaded stop pin, which is vertically connected to the end of the connecting rod.

9. A connecting rod for a disassembled piston according to claim 1 or 2, characterized in that The support base is inverted U-shaped and matches the upper half of the outer frame of the crankcase access port. There is a fixing hole on each of the left and right sides, and its position corresponds to the screw holes on both sides of the outer frame of the crankcase access port, which is used to fix the support base to the outer frame of the crankcase access port.

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