Length-adjustable connecting rod

Abstract

The utility model relates to the technical field of connecting rods, in particular to a length-adjustable connecting rod which comprises a first connecting rod assembly and a lower connecting rod assembly, a connecting and fixing assembly is installed at the lower end of the first connecting rod assembly, and the lower connecting rod assembly is installed at the lower end of the connecting and fixing assembly. Lug seats are fixedly connected to the front end and the rear end of the connecting rod body, a cylindrical oil groove is formed in the lower end of the connecting rod body, limiting shaft grooves are formed in the inner sides of the lug seats, limiting rings are rotationally connected to the inner sides of the limiting shaft grooves formed in the lug seats, bolts are fixedly connected to the inner sides of the limiting rings, and inner threaded cylinders are spirally connected to the outer sides of the bolts; the top end and the bottom end of the connecting rod are fixedly connected with built-in columns, the outer sides of the built-in columns are fixedly connected with first rubber rings, the phenomenon that the adjusted connecting rod is hollow is reduced, the strength and stability of the connecting rod after length adjustment are improved, and then the service life of the connecting rod is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of linkage technology, specifically to an adjustable-length linkage. Background Technology

[0002] Linkages are an important component in mechanical transmission systems. They are typically used to connect two relatively moving components, transmitting and converting the reciprocating linear or rotational motion of one component into the corresponding motion of the other, thereby realizing the transmission of power and the conversion of motion. They are widely used in various mechanical equipment such as engines, compressors, and robotic arms, and are key connecting elements for realizing mechanical motion and energy transmission.

[0003] Connecting rods are a key component of an engine, primarily responsible for connecting the piston and crankshaft, converting the reciprocating linear motion of the piston into the rotational motion of the crankshaft, and transmitting the force acting on the piston to the crankshaft to output power.

[0004] In automotive connecting rod length adjustment technology, existing methods typically employ a hollow design inside the connecting rod to achieve length adjustment. However, since some areas inside the connecting rod are hollow, this significantly affects the overall strength of the connecting rod. The connecting rod is responsible for transmitting output power in the engine and needs to withstand a large load. Under high-intensity working conditions, especially when the engine is running under high load or the vehicle is traveling on rough roads, this type of connecting rod is more prone to deformation or damage, thus affecting the normal operation of the engine and the performance of the vehicle. Therefore, an adjustable length connecting rod is proposed to address the above problems. Utility Model Content

[0005] The purpose of this invention is to provide an adjustable length connecting rod to solve the problem that existing methods typically use a hollow design inside the connecting rod to achieve length adjustment. Under high-intensity working conditions, this type of connecting rod is more prone to deformation or damage, thereby affecting the normal operation of the engine and the performance of the vehicle.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An adjustable-length connecting rod includes a first connecting rod assembly and a lower connecting rod assembly. A connecting and fixing assembly is mounted on the lower end of the first connecting rod assembly, and the lower connecting rod assembly is mounted on the lower end of the connecting and fixing assembly. The first connecting rod assembly includes a connecting rod body, with lugs fixedly connected to both its front and rear ends. A cylindrical oil groove is formed at the lower end of the connecting rod body. A limiting shaft groove is formed inside the lugs, and a limiting ring is rotatably connected inside the limiting shaft groove. A bolt is fixedly connected inside the limiting ring, and an internal thread is helically connected to the outer side of the bolt. The threaded cylinder, the connecting and fixing assembly includes a load-bearing base, an internal column fixedly connected to the top and bottom of the load-bearing base, a first rubber ring fixedly connected to the outside of the internal column, a second oil passage opened on the inside of the internal column, a first oil passage opened on the inside of the load-bearing base, a threaded hole opened at the right end of the load-bearing base, a second rubber ring fixedly connected to one side of the threaded hole opened on the load-bearing base, a double channel opened on the inside of the load-bearing base, a perforated screw screw spirally fitted on the inside of the threaded hole opened on the load-bearing base, and the bottom end of the internal threaded cylinder fixedly connected to the top end of the load-bearing base.

[0008] As a further optimization of this utility model, the cylindrical oil groove is cylindrical in shape, the cylindrical oil groove passes through the lower end of the connecting rod body, and the upper end of the lower connecting rod assembly is provided with an ear seat and a cylindrical oil groove.

[0009] As a further optimization of this utility model, the limiting shaft groove is shaped as a three-section cylinder, the limiting shaft groove extends through the inner side of the ear seat from top to bottom, and the number of limiting shaft grooves is the same as the number of ear seats.

[0010] As a further optimization of this utility model, the limiting ring is in the shape of a circular ring, the limiting ring is embedded in the limiting shaft groove opened in the ear seat, the upper end of the bolt is embedded in the limiting shaft groove opened in the ear seat, and the top end of the bolt is flush with the top end of the ear seat.

[0011] As a further optimization of this utility model, the following features are provided: the inner side of the internally threaded cylinder has a threaded hole; two internally threaded cylinders are fixed at the top and bottom of the bearing seat; the internally threaded cylinders are distributed at the front and rear ends of the built-in column; and two-fifths of the bolt is located inside the internally threaded cylinder.

[0012] As a further optimization of this utility model, the built-in column is cylindrical in shape, with two-fifths of the built-in column embedded inside the cylindrical oil groove. The outer side of the built-in column is in contact with the cylindrical oil groove opened in the connecting rod body, and the outer side of the first rubber ring is in close contact with the inner side of the cylindrical oil groove opened in the connecting rod body.

[0013] As a further optimization of this utility model, the following features are provided: the first oil passage extends vertically through the inner side of the support seat, the second oil passage extends vertically through the inner side of the built-in column, the first oil passage and the second oil passage are connected, the first oil passage is connected to the inside of the threaded hole through a double channel, the threaded hole extends through the right end of the support seat, the left side of the perforated screw has a smooth planar structure, and the right side of the second rubber ring is fitted with the left side of the perforated screw.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] In this utility model, by setting the first connecting rod assembly and the connecting and fixing assembly, the device greatly reduces the hollowness inside the adjusted connecting rod by filling it with hydraulic oil, improves the strength and stability of the connecting rod after length adjustment, and thus extends the service life of the connecting rod, ensuring the normal operation of the engine connecting rod;

[0016] Specifically, during the connecting rod length adjustment process, multiple Torx screwdrivers and rotating connecting parts are used to adjust the spacing between various parts of the connecting rod, enabling flexible adjustment of the connecting rod length. After adjustment, hydraulic oil is injected and relevant channels are sealed to create constant pressure inside the connecting rod, significantly enhancing the connection stability between the connecting rod components and effectively preventing changes in the distance between components. This greatly improves the strength and service life of the connecting rod, ensuring the normal operation of the engine under harsh conditions such as high loads and improving the overall performance of the vehicle, providing a strong guarantee for the stable and efficient operation of the car engine. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a cross-sectional structural diagram of the connecting rod body of this utility model;

[0019] Figure 3 This is a cross-sectional structural diagram of the load-bearing seat of this utility model;

[0020] Figure 4 This is a schematic diagram of the bolt structure of this utility model;

[0021] Figure 5 This is a cross-sectional structural diagram of the built-in column of this utility model;

[0022] Figure 6 This is a schematic diagram of the perforated screw structure of this utility model;

[0023] Figure 7 This utility model Figure 6 A schematic diagram of the structure at point A.

[0024] In the diagram: 1. First connecting rod assembly; 11. Connecting rod body; 12. Ear seat; 13. Cylindrical oil groove; 14. Limiting shaft groove; 15. Bolt; 16. Limiting ring; 17. Internal threaded cylinder;

[0025] 2. Connecting and fixing components; 21. Load-bearing base; 22. Built-in column; 23. First rubber ring; 24. First oil passage; 25. Second oil passage; 26. Threaded hole; 27. Second rubber ring; 28. Perforated screw; 29. ​​Dual channel;

[0026] 3. Lower connecting rod assembly. Detailed Implementation

[0027] 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.

[0028] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0029] Please see Figure 1-7 This utility model provides a technical solution:

[0030] An adjustable-length connecting rod includes a first connecting rod assembly 1 and a lower connecting rod assembly 3. A connecting and fixing assembly 2 is mounted on the lower end of the first connecting rod assembly 1, and the lower connecting rod assembly 3 is mounted on the lower end of the connecting and fixing assembly 2. The first connecting rod assembly 1 includes a connecting rod body 11. Ear seats 12 are fixedly connected to both the front and rear ends of the connecting rod body 11. A cylindrical oil groove 13 is formed at the lower end of the connecting rod body 11. A limiting shaft groove 14 is formed on the inner side of the ear seat 12. A limiting ring 16 is rotatably connected to the inner side of the limiting shaft groove 14 in the ear seat 12. A bolt 15 is fixedly connected to the inner side of the limiting ring 16, and an internally threaded cylinder 17 is spirally connected to the outer side of the bolt 15. The connecting and fixing assembly 2 includes a load-bearing base 21. The top and bottom ends of the load-bearing base 21 are fixedly connected to an internal column 22. A first rubber ring 23 is fixedly connected to the outside of the internal column 22. A second oil passage 25 is opened on the inside of the internal column 22. A first oil passage 24 is opened on the inside of the load-bearing base 21. A threaded hole 26 is opened at the right end of the load-bearing base 21. A second rubber ring 27 is fixedly connected to one side of the threaded hole 26 in the load-bearing base 21. A double channel 29 is opened on the inside of the load-bearing base 21. A perforated screw 28 is spirally fitted inside the threaded hole 26 in the load-bearing base 21. The bottom end of the internal threaded cylinder 17 is fixedly connected to the top end of the load-bearing base 21.

[0031] As a further implementation of this solution, the cylindrical oil groove 13 is cylindrical in shape and passes through the lower end of the connecting rod body 11. The lower connecting rod assembly 3 is provided with an ear seat 12 and a cylindrical oil groove 13 at its upper end. With this arrangement, the distances between the first connecting rod assembly 1, the lower connecting rod assembly 3 and the connecting and fixing assembly 2 can be adjusted respectively.

[0032] As a further implementation of this solution, the limiting shaft groove 14 is shaped as a three-section cylinder, extending vertically through the inner side of the lug 12. The number of limiting shaft grooves 14 is the same as the number of lugs 12. The limiting ring 16 is annular in shape and is embedded in the limiting shaft groove 14 of the lug 12. The upper end of the bolt 15 is embedded in the limiting shaft groove 14 of the lug 12, with the top of the bolt 15 flush with the top of the lug 12. The inner side of the internally threaded cylinder 17 has a threaded hole. The top and bottom of the load-bearing seat 21 are... Two internal threaded cylinders 17 are fixed, and the internal threaded cylinders 17 are distributed at the front and rear ends of the built-in column 22. Two-fifths of the bolt 15 is inside the internal threaded cylinder 17. With this setting, the bolt 15 can be rotated with a tool, so that the bolt 15 rotates spirally inside the internal threaded cylinder 17, thereby adjusting the distance between the bolt 15 and the internal threaded cylinder 17, and thus achieving the effect of adjusting the distance between the connecting rod body 11 and the load-bearing seat 21. The design of the limiting shaft groove 14 and the limiting ring 16 can prevent the bolt 15 from separating from the ear seat 12.

[0033] As a further implementation of this solution, the built-in column 22 is cylindrical in shape, with two-fifths of the built-in column 22 embedded inside the cylindrical oil groove 13. The outer side of the built-in column 22 is in contact with the cylindrical oil groove 13 opened in the connecting rod body 11, and the outer side of the first rubber ring 23 is in close contact with the inner side of the cylindrical oil groove 13 opened in the connecting rod body 11. This setting can improve the connection strength between the cylindrical oil groove 13 and the built-in column 22 or between the lower connecting rod assembly 3 and the built-in column 22, and at the same time prevent the built-in column 22 from detaching from the interior of the cylindrical oil groove 13.

[0034] As a further implementation of this solution, the first oil passage 24 penetrates the inner side of the support seat 21 vertically, and the second oil passage 25 penetrates the inner side of the built-in column 22 vertically. The first oil passage 24 and the second oil passage 25 are connected. The first oil passage 24 is connected to the inside of the threaded hole 26 through the double channel 29. The threaded hole 26 penetrates the right end of the support seat 21. The left side of the perforated screw 28 has a smooth flat structure. The right side of the second rubber ring 27 fits against the left side of the perforated screw 28. With this setting, hydraulic oil can be filled into the first connecting rod assembly 1 and the connecting fixing assembly 2 through the threaded hole 26 to prevent the distance between the built-in column 22 and the connecting rod body 11 from changing. At the same time, it improves the stability of the connection between the bolt 15 and the internal threaded cylinder 17. This design not only improves the strength after the connecting rod length is adjusted, but also improves the service life of the connecting rod and ensures the normal operation of the starting connecting rod.

[0035] Workflow: When adjusting the length of the connecting rod, fix the connecting and fixing assembly 2 to the existing clamp or fixed structure, so that the direction of the inner column 22 is upward. Place two screwdrivers on the Torx of the bolt 15 respectively, and rotate the two bolts 15 at the same time. Through the design of multiple bolts 15 and internal threaded cylinder 17, the stability of the connection between the connecting and fixing assembly 2 and the first connecting rod assembly 1 can be improved. The bolts 15 are rotatably connected to the inner side of the limiting shaft groove 14 opened in the ear seat 12 through the limiting ring 16. When the two bolts 15 are rotated, the bolts 15 rotate and move up and down inside the internal threaded cylinder 17. At this time, the bolts 15 drive the connecting rod body 11 to move upward or downward. Then, in the same way, turn the lower connecting rod assembly 3 upward and adjust the distance between the lower connecting rod assembly 3 and the connecting and fixing assembly 2. At this time, the adjustment effect of the connecting rod length is completed.

[0036] To improve the strength and stability of the connecting rod after adjustment, following the same principle, when the distance between the connecting rod body 11 and the load-bearing seat 21 changes, the built-in column 22 slides inside the cylindrical oil groove 13 opened in the connecting rod body 11. The first rubber ring 23 seals the space between the built-in column 22 and the connecting rod body 11. Simultaneously, because the built-in column 22 is installed inside the cylindrical oil groove 13, when the distance between the load-bearing seat 21 and the connecting rod body 11 moves away, external air enters the double channel 29 and the first oil passage 24 through the threaded hole 26, and then enters the second oil passage 25 and the cylindrical oil groove 13 through the first oil passage 24, thus balancing the air pressure inside the cylindrical oil groove 13 and the second oil passage 25. When the distance between the connecting rod body 11 and the load-bearing seat 21 moves away, the air inside the cylindrical oil groove 13 and the second oil passage 25 exits through the threaded hole... After the distance between the connecting rod assembly 3 and the connecting fixing assembly 2 and the first connecting rod assembly 1 and the connecting fixing assembly 2 are adjusted, hydraulic oil is injected into the cylindrical oil groove 13, the second oil passage 25, the first oil passage 24 and the double channel 29 through the threaded hole 26. After the injection is completed, the threaded hole 26 is sealed through the perforated screw 28. The left side of the perforated screw 28 is in close contact with the right side of the second rubber ring 27, which serves to seal the double channel 29. At this time, the pressure inside the cylindrical oil groove 13 and the second oil passage 25 is constant, which can prevent the distance between the built-in column 22 and the connecting rod body 11 from changing. At the same time, it improves the stability of the connection between the bolt 15 and the internal threaded cylinder 17. This design not only improves the strength after the connecting rod length is adjusted, but also improves the service life of the connecting rod and ensures the normal operation of the engine connecting rod.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An adjustable-length linkage, comprising a first linkage assembly (1) and a lower linkage assembly (3), characterized in that: A connecting and fixing component (2) is installed at the lower end of the first connecting rod assembly (1), and a lower connecting rod assembly (3) is installed at the lower end of the connecting and fixing component (2). The first connecting rod assembly (1) includes a connecting rod body (11), with lugs (12) fixedly connected to both the front and rear ends of the connecting rod body (11). A cylindrical oil groove (13) is provided at the lower end of the connecting rod body (11). A limiting shaft groove (14) is provided inside the lug (12). A limiting ring (16) is rotatably connected inside the limiting shaft groove (14) provided in the lug (12). A bolt (15) is fixedly connected inside the limiting ring (16). An internal threaded cylinder (17) is spirally connected to the outside of the bolt (15). The connecting and fixing assembly (2) includes a load-bearing seat (21). The top and bottom are both fixedly connected to an internal column (22). The outer side of the internal column (22) is fixedly connected to a first rubber ring (23). The inner side of the internal column (22) is provided with a second oil passage (25). The inner side of the bearing seat (21) is provided with a first oil passage (24). The right end of the bearing seat (21) is provided with a threaded hole (26). The threaded hole (26) of the bearing seat (21) is fixedly connected to one side of a second rubber ring (27). The inner side of the bearing seat (21) is provided with a double channel (29). The inner side of the threaded hole (26) of the bearing seat (21) is spirally fitted with a perforated screw (28). The bottom end of the internal threaded cylinder (17) is fixedly connected to the top end of the bearing seat (21).

2. The adjustable length connecting rod according to claim 1, characterized in that: The cylindrical oil groove (13) is cylindrical in shape and passes through the lower end of the connecting rod body (11). The upper end of the lower connecting rod assembly (3) is provided with an ear seat (12) and a cylindrical oil groove (13).

3. The adjustable length connecting rod according to claim 1, characterized in that: The limiting shaft groove (14) is shaped as a three-section cylinder. The limiting shaft groove (14) extends through the inner side of the ear seat (12) from top to bottom. The number of limiting shaft grooves (14) is the same as the number of ear seats (12).

4. The adjustable length connecting rod according to claim 1, characterized in that: The limiting ring (16) is in the shape of a circular ring. The limiting ring (16) is embedded in the limiting shaft groove (14) opened in the ear seat (12). The upper end of the bolt (15) is embedded in the limiting shaft groove (14) opened in the ear seat (12). The top end of the bolt (15) is flush with the top end of the ear seat (12).

5. The adjustable length connecting rod according to claim 1, characterized in that: The inner threaded cylinder (17) has a threaded hole on its inner side. The top and bottom of the bearing seat (21) are fixed with two inner threaded cylinders (17). The inner threaded cylinders (17) are distributed at the front and rear ends of the built-in column (22). Two-fifths of the bolt (15) is inside the inner threaded cylinder (17).

6. The adjustable length connecting rod according to claim 1, characterized in that: The built-in column (22) is cylindrical in shape. Two-fifths of the built-in column (22) is embedded in the interior of the cylindrical oil groove (13). The outer side of the built-in column (22) is in contact with the cylindrical oil groove (13) opened on the connecting rod body (11). The outer side of the first rubber ring (23) is in close contact with the inner side of the cylindrical oil groove (13) opened on the connecting rod body (11).

7. The adjustable length connecting rod according to claim 1, characterized in that: The first oil passage (24) passes through the inner side of the support seat (21) vertically, and the second oil passage (25) passes through the inner side of the built-in column (22) vertically. The first oil passage (24) and the second oil passage (25) are connected. The first oil passage (24) is connected to the inside of the threaded hole (26) through the double channel (29). The threaded hole (26) passes through the right end of the support seat (21). The left side of the perforated screw (28) is a smooth planar structure. The right side of the second rubber ring (27) is in contact with the left side of the perforated screw (28).

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