Crank-link mechanism of piston engine
By introducing breakable limiting components and connecting bolts into the crankshaft connecting rod mechanism of a piston engine, the problem of piston connecting rod bending or breakage is solved, and the impact force is buffered and the broken parts are collected, reducing maintenance difficulty and cost, and improving equipment reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-17
- Publication Date
- 2026-04-07
AI Technical Summary
In existing crank-connecting rod mechanisms, the piston connecting rod is prone to bending or breaking after liquid enters the combustion chamber, leading to piston damage and crankshaft deformation, increasing the difficulty and cost of equipment maintenance.
A piston engine crankshaft connecting rod mechanism was designed, which uses a breakable limiting component and connecting bolts to connect the first connecting rod and the second connecting rod. When the limiting component breaks, the second connecting rod retracts into the telescopic hole to buffer the impact force, and the broken pin rod is collected by a protective cover and a magnet to avoid damage to the combustion chamber.
This effectively avoids damage to the piston and crankshaft, reduces maintenance difficulty and cost, and at the same time reduces the impact on the combustion chamber, improving the reliability and ease of maintenance of the equipment.
Smart Images
Figure CN224093476U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of crank connecting rod mechanism, concretely relates to a piston engine crank connecting rod mechanism. BACKGROUND
[0002] The piston is connected with the crank through the crank connecting rod mechanism in the engine, so that the piston movement in the engine is facilitated.
[0003] The existing crank connecting rod mechanism comprises a machine body group, a piston connecting rod group and a crankshaft flywheel group, in the working stroke, the piston bears the gas pressure and moves linearly in the cylinder, the linear motion is converted into the rotary motion of the crankshaft through the connecting rod, and the power is outputted from the crankshaft, the existing piston connecting rod is of an integral structure, when the combustion chamber is filled with liquid, the piston connecting rod is directly bent and broken, in this process, the piston can scratch the combustion chamber, and the piston is damaged, the crankshaft is deformed, and the difficulty and cost of the later maintenance of the equipment are greatly increased. UTILITY MODEL CONTENTS
[0004] The utility model discloses a piston engine crank connecting rod mechanism, which solves the problems in the background art.
[0005] To achieve the above object, the utility model provides the following technical scheme: a piston engine crank connecting rod mechanism, comprising: a piston body, one end of the piston body is sequentially provided with a first connecting rod and a second connecting rod connected, a breakable limiting piece is arranged between the first connecting rod and the second connecting rod, an expansion hole for accommodating the second connecting rod is formed in the first connecting rod, and one end of the second connecting rod is retracted into the expansion hole based on the breakage.
[0006] Preferably, the limiting piece comprises two plug rods which are the same in structure, a threaded hole is arranged on the same axis of the two plug rods, a connecting bolt is arranged between the two threaded holes for connection, plug holes extending into the expansion hole are formed in the two symmetrical sides of the first connecting rod, and the two plug rods are respectively inserted into the corresponding plug holes from the outside to the inside.
[0007] Preferably, a protective cover for collecting the plug rods is arranged on the outside of each plug hole, a magnet for collecting the plug rods is inlaid on the inner wall of the protective cover, and an external thread seat for connecting the protective cover is arranged on the outside of the plug hole.
[0008] Preferably, a connecting block extending into the expansion hole is arranged at one end of the second connecting rod, one end of the connecting block abuts on the two plug rods, a connecting piece connected with the first connecting rod is arranged on the second connecting rod, and the connecting piece is used for limiting the connecting block in the expansion hole.
[0009] Preferably, the connecting piece comprises a screw sleeve, the screw sleeve is sleeved on the second connecting rod, the inner diameter of the screw sleeve is smaller than the outer diameter of the connecting block, and the end of the first connecting rod is provided with an external thread joint matched with the screw sleeve.
[0010] Preferably, the opposite end of each of the plug-in rods is provided with a taper surface, and the connecting block abuts on the taper surface.
[0011] Compared with the prior art, the utility model has the following beneficial effects:
[0012] (1) The utility model discloses a first connecting rod, a second connecting rod and a limiting piece are additionally arranged, when the impact force borne by the first connecting rod and the second connecting rod is greater than the bearing force of the limiting piece, the limiting piece breaks, thereby allowing the second connecting rod to retract into the telescopic hole, the bending or breaking between the first connecting rod and the second connecting rod can be avoided, the impact on the combustion chamber caused by the piston body is reduced, and the bending deformation of the crankshaft is avoided.
[0013] (2) The utility model discloses two plug-in rods connected through connecting bolts, when the connecting bolts break, the two plug-in rods release the limitation on the second connecting rod, thereby facilitating the retraction of the second connecting rod into the telescopic hole, and facilitating the buffering of the impact force borne by the connecting rod.
[0014] (3) The utility model discloses a protective cover and a magnetite are additionally arranged, the broken plug-in rods can be collected through the above-mentioned components, and the broken plug-in rods can be prevented from entering the combustion chamber. DRAWINGS
[0015] Figure 1 It is a side view of the utility model;
[0016] Figure 2 It is a partial sectional view of the utility model;
[0017] Figure 3 It is a perspective view of the plug-in rod of the utility model;
[0018] In the drawing: 1, piston body; 2, first connecting rod; 3, external thread joint; 4, screw sleeve; 5, second connecting rod; 6, protective cover; 7, magnetite; 8, external thread seat; 9, plug-in hole; 10, plug-in rod; 11, taper surface; 12, connecting bolt; 13, telescopic hole; 14, connecting block; 15, thread hole. PREFERRED EMBODIMENT
[0019] The technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0020] Reference Figures 1-2 As shown in the figure, the utility model provides a piston engine crank connecting rod mechanism, including: piston body 1, one end of piston body 1 is equipped with the first connecting rod 2 and second connecting rod 5 that connect in proper order, and the first connecting rod 2 and second connecting rod 5 are equipped with the breakable limit piece between connection, the telescopic hole 13 for accommodating second connecting rod 5 is set up on the first connecting rod 2, and the one end of second connecting rod 5 is retracted into telescopic hole 13 based on breakage.
[0021] Above, when the first connecting rod 2 and second connecting rod 5 are greater than threshold value when force, limit piece force breaks, second connecting rod 5 telescopes on the first connecting rod 2 through telescopic hole 13, and the bending and breakage of connecting rod can be avoided.
[0022] In the utility model, in combination with Figures 2-3 As shown in the figure, the limit piece of the embodiment includes two structure same bolt rods 10, and the same axial line of two bolt rods 10 is all penetrated with threaded hole 15, and the connecting bolt 12 for connecting is equipped between two threaded holes 15, and the bolt hole 9 extending into telescopic hole 13 is set up in the two symmetrical sides of the first connecting rod 2 inward, and two bolt rods 10 are respectively inserted in the corresponding bolt hole 9 from outside to inside.
[0023] Reference Figure 2 As shown in the figure, the one end of second connecting rod 5 is equipped with the connecting block 14 extending into telescopic hole 13, and the one end of connecting block 14 is abutted on two bolt rods 10, and the connecting piece for connecting first connecting rod 2 is equipped on second connecting rod 5, and the connecting piece is used to limit connecting block 14 in telescopic hole 13.
[0024] Above, when the first connecting rod 2 and second connecting rod 5 are greater than threshold value when force, limit piece force breaks, second connecting rod 5 telescopes on the first connecting rod 2 through telescopic hole 13, and the bending and breakage of connecting rod can be avoided.
[0025] Further, in order to facilitate the detachable connection of the first connecting rod 2 and the second connecting rod 5, referenceFigures 1-2 As shown, the connecting piece comprises a sleeve 4 sleeved on the second connecting rod 5, the inner diameter of the sleeve 4 is smaller than the outer diameter of the connecting block 14, and the end of the first connecting rod 2 is provided with an external thread joint 3 matched with the sleeve 4. The connecting block 14 on the second connecting rod 5 is placed in the telescopic hole 13, at this time, the sleeve 4 is screwed on the external thread joint 3 on the first connecting rod 2, so as to connect the first connecting rod 2 and the second connecting rod 5.
[0026] Further, in order to avoid the interference of the broken bolt rod 10 to the telescopic movement of the second connecting rod 5, referring to Figures 2-3 As shown, the opposite end of each bolt rod 10 is provided with a tapered surface 11, and the connecting block 14 abuts against the tapered surface 11. When the connecting bolt 12 is broken, the connecting block 14 is forced to abut against the tapered surface 11, so as to push the bolt rod 10 out of the bolt hole 9 through the tapered surface 11, avoiding the interference of the bolt rod 10 to the telescopic movement of the second connecting rod 5 in the telescopic hole 13.
[0027] In the utility model, in combination with Figure 2 As shown, the outer side of each bolt hole 9 of the embodiment is provided with a protective cover 6 for collecting the bolt rod 10, the inner wall of the protective cover 6 is inlaid with a magnet 7 for collecting the bolt rod 10, and the outer side of the bolt hole 9 is provided with an external thread seat 8 for connecting the protective cover 6.
[0028] As described above, when the protective cover 6 provided by the utility model is used, after the installation of the bolt rod 10 is completed, the protective cover 6 is detachably installed on the first connecting rod through the external thread seat 8, at this time, the protective cover 6 is located on the outer side of the bolt rod 10, when the connecting bolt 12 is broken and pushed outwards, the bolt rod 10 is adsorbed in the protective cover 6 through the magnet 7, avoiding the entry of the bolt rod 10 into the combustion chamber.
[0029] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.
Claims
1. A crank-connecting rod mechanism for a piston engine, characterized in that, include: A piston body (1) is provided with a first connecting rod (2) and a second connecting rod (5) connected in sequence at one end of the piston body (1). A breakable limiting member is provided between the first connecting rod (2) and the second connecting rod (5). A telescopic hole (13) is provided on the first connecting rod (2) for accommodating the second connecting rod (5). Based on the break, one end of the second connecting rod (5) is retracted into the telescopic hole (13).
2. The piston engine crankshaft connecting rod mechanism according to claim 1, characterized in that: The limiting component includes two identical pin rods (10), both of which have threaded holes (15) passing through the same axis. A connecting bolt (12) for connection is provided between the two threaded holes (15). The first connecting rod (2) has pin holes (9) extending into the telescopic hole (13) on both symmetrical sides. The two pin rods (10) are inserted into the corresponding pin holes (9) from the outside to the inside.
3. The piston engine crankshaft connecting rod mechanism according to claim 2, characterized in that: Each of the pin holes (9) is provided with a protective cover (6) for collecting the pin rod (10) on the outside. The inner wall of the protective cover (6) is inlaid with a magnet (7) for collecting the pin rod (10). The outside of the pin hole (9) is provided with an external threaded seat (8) for connecting the protective cover (6).
4. The piston engine crankshaft connecting rod mechanism according to claim 2, characterized in that: One end of the second connecting rod (5) is provided with a connecting block (14) extending into the telescopic hole (13). One end of the connecting block (14) abuts against two pin rods (10). The second connecting rod (5) is provided with a connector connected to the first connecting rod (2). The connector is used to restrict the connecting block (14) in the telescopic hole (13).
5. A piston engine crankshaft connecting rod mechanism according to claim 4, characterized in that: The connector includes a threaded sleeve (4), which is sleeved on the second connecting rod (5). The inner diameter of the threaded sleeve (4) is smaller than the outer diameter of the connecting block (14). The end of the first connecting rod (2) is provided with an external threaded connector (3) that mates with the threaded sleeve (4).
6. The piston engine crankshaft connecting rod mechanism according to claim 4, characterized in that: Each of the pins (10) has a conical surface (11) at one end, and the connecting block (14) abuts against the conical surface (11).