Heavy truck thrust rod end cap

Abstract

The utility model relates to heavy truck suspension system technical field discloses a heavy truck thrust rod end cover, including fixed link, the left and right ends of fixed link all install buffer pipe, the end of buffer pipe is fixedly connected with end cover body, the inside of end cover body is equipped with annular groove, the inboard of annular groove installs elastic sealing ring, in the utility model, end cover body is nylon 66 injection molding, its inner wall is equipped with annular groove, elastic sealing ring is fluorine rubber material, is nested in annular groove, metal reinforcing ring is stainless steel stamping part, is embedded in the outer edge of end cover body, when vehicle vibration, buffer pipe absorbs axial impact, end cover body damping characteristic reduces the vibration energy that transmits to metal reinforcing ring, metal reinforcing ring restricts the plastic deformation of end cover body under long -term load, maintains the pre -tightening force of sealing ring, elastic sealing ring is tightly close to thrust rod journal under radial compression force, blocks dust and moisture invasion.

Description

Technical Field

[0001] This utility model relates to the technical field of heavy truck suspension systems, and in particular to a thrust rod end cap for heavy trucks. Background Technology

[0002] The thrust rod in the suspension system of a heavy truck is a key component connecting the frame and the axle. Its end is usually sealed and protected by an end cap. With the increase in the load capacity of heavy trucks and the increasing complexity of the driving environment, the thrust rod end cap needs to withstand greater impact loads and vibration wear.

[0003] A search revealed Chinese Patent Publication No. CN115056614A, which discloses a thrust rod comprising a rod body, a connector shell, a ball head, a polymer elastomer, a length adjustment device, and a gap adjustment device. The connector shell is installed at the end of the rod body and has a mounting portion. The rod body is a hollow structure. The length adjustment device has a control end and a locking end, and is installed within the mounting portion. Both the control end and the locking end of the length adjustment device extend out of the mounting portion. The control end controls the locking end to lock onto the inner side of the rod body. The polymer elastomer is die-cast onto the outside of the ball head. The ball head and the polymer elastomer are fitted inside the connector shell. The gap adjustment device is installed... The gap adjustment device, installed between the polymer elastomer and the connector shell, has a free state and a tightened state. The diameter of the gap adjustment device in the tightened state is smaller than that in the free state, which increases the tire service life. However, the end cap has poor corrosion resistance. The end cap is subjected to surface anti-corrosion treatment, such as zinc plating, nickel plating, and spraying anti-corrosion coating, to improve its corrosion resistance. The coating material with good corrosion resistance is selected, and the thickness and adhesion of the coating are ensured to meet the requirements. However, during long-term use, the end cap is prone to sealing failure and metal fatigue fracture, resulting in lubricating oil leakage and dust intrusion, which in turn accelerates the wear of the thrust rod joint bearing and affects the overall vehicle driving safety and suspension life. Utility Model Content

[0004] To overcome the above deficiencies, this utility model provides a heavy-duty truck thrust rod end cap, which aims to improve the problems in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a heavy-duty truck thrust rod end cap, comprising a fixing rod, with buffer tubes installed at both ends of the fixing rod, and an end cap body fixedly connected to the end of the buffer tubes. An annular groove is formed on the inner side of the end cap body, and an elastic sealing ring is installed on the inner side of the annular groove. A metal reinforcing ring is installed on the outer wall of the end cap body, with an upper housing installed at the top of the metal reinforcing ring and a lower housing installed at the bottom of the metal reinforcing ring. Multiple mounting holes are equidistantly formed on the outer walls of the upper and lower housings, and a fixing mechanism is installed on the inner wall of the mounting holes. The fixing mechanism is used to fix the upper housing, the lower housing, and the metal reinforcing ring together to prevent the structure from loosening and being damaged.

[0006] Through the above technical solution: the end cap body is injection molded from nylon 66, and its inner wall is provided with an annular groove. The elastic sealing ring is made of fluororubber and is nested in the annular groove. The metal reinforcing ring is a stainless steel stamped part and is embedded in the outer edge of the end cap body. When the vehicle vibrates, the buffer tube absorbs the axial impact, the damping characteristics of the end cap body reduce the vibration energy transmitted to the metal reinforcing ring, the metal reinforcing ring restricts the plastic deformation of the end cap body under long-term load, maintains the preload of the sealing ring, and the elastic sealing ring is tightly attached to the thrust rod journal under radial compression force, preventing dust and moisture from entering.

[0007] As a further description of the above technical solution: The fixing mechanism includes a gasket, which is installed on the inner bottom wall of the mounting hole. A second fixing block is installed on the top of the gasket, and a first fixing block is installed on the top of the second fixing block. A bolt is threadedly connected to the first fixing block, the second fixing block, and the inner wall of the gasket. A fixing ring is installed on the outer side of the first fixing block, and a mounting groove is opened on the inner side of the fixing ring. The first fixing block is threadedly connected to the mounting groove.

[0008] The above technical solution involves placing the gasket at the bottom of the mounting hole, then inserting the second fixing block and the first fixing block in sequence, and then screwing in the first bolt. The first bolt passes through the gasket and enters the inner wall of the metal reinforcing ring, fixing the upper and lower housings together with the metal reinforcing ring, protecting the internal structure, preventing loosening, and further improving the sealing performance to prevent dust and moisture from entering the internal structure.

[0009] As a further description of the above technical solution: The outer wall of the buffer tube is equipped with mounting blocks, which are installed on the left and right sides of the outer wall of the buffer tube.

[0010] The above technical solution involves fixing the buffer tube to the outer surface of the fixing rod using the mounting block.

[0011] As a further description of the above technical solution: The mounting block has screw holes on its outer wall, which are equidistantly located on the front and rear sides of the outer wall.

[0012] Through the above technical solution, screw holes are mainly used to connect, fix and position parts through threaded fasteners.

[0013] As a further description of the above technical solution: The inner wall of the screw hole is threaded with a second bolt, which is threaded onto the inner wall of the buffer tube.

[0014] Through the above technical solution: Bolt 2 is used to fix the mounting block on the buffer tube to ensure a firm and reliable connection that can withstand various forces during vehicle operation.

[0015] As a further description of the above technical solution: A fixing frame is installed inside the elastic sealing ring, and a bearing is installed inside the fixing frame.

[0016] The above technical solution involves a fixed frame that mates with the bearing housing and the mechanical casing, with raceways on the inner side that, together with the inner ring raceways, constrain the movement trajectory of the balls.

[0017] As a further description of the above technical solution: The bearing is rotatably connected to the inner side of the fixed frame with multiple balls, and the fixed frame constrains the movement trajectory of the balls.

[0018] The above technical solution involves a bearing that mates with a connecting rod, with a shaft hole machined on the inner side of the inner ring and a raceway on the outer side for the balls to roll. The balls transmit load through rolling contact, reducing friction.

[0019] As a further description of the above technical solution: A connecting rod is installed on the inner wall of the bearing, and the connecting rod is fixedly connected to the bearing and rotates with the bearing.

[0020] The above technical solution involves the bearing cooperating with the connecting rod and rotating together with it.

[0021] This utility model has the following beneficial effects: 1. In this utility model, the end cap body is injection molded from nylon 66, and its inner wall is provided with an annular groove. The elastic sealing ring is made of fluororubber and is nested in the annular groove. The metal reinforcing ring is a stainless steel stamped part and is embedded in the outer edge of the end cap body. When the vehicle vibrates, the buffer tube absorbs the axial impact, the damping characteristics of the end cap body reduce the vibration energy transmitted to the metal reinforcing ring, the metal reinforcing ring restricts the plastic deformation of the end cap body under long-term load, maintains the preload of the sealing ring, and the elastic sealing ring is tightly attached to the thrust rod journal under radial compression force to prevent dust and moisture from entering.

[0022] 2. In this utility model, the gasket is placed at the bottom of the mounting hole, and then the second fixing block and the first fixing block are placed in sequence. Then the first bolt is screwed in. The first bolt passes through the gasket and enters the inner wall of the metal reinforcing ring, fixing the upper shell and the lower shell together with the metal reinforcing ring, protecting the internal structure, preventing loosening, and further improving the sealing performance to prevent dust and moisture from entering the internal structure. Attached Figure Description

[0023] Figure 1 This is a perspective view of a heavy-duty truck thrust rod end cap proposed in this utility model; Figure 2 This is a front view of a heavy-duty truck thrust rod end cap proposed in this utility model; Figure 3 This is a partial structural schematic diagram of a heavy-duty truck thrust rod end cap proposed in this utility model; Figure 4 This is a partial structural cross-sectional view of a heavy-duty truck thrust rod end cap proposed in this utility model; Figure 5 This is a schematic diagram of a fixing mechanism for the end cap of a heavy-duty truck thrust rod proposed in this utility model.

[0024] Legend: 1. Fixing rod; 2. Fixing mechanism; 201. Fixing ring; 202. Mounting groove; 203. Bolt 1; 204. Fixing block 1; 205. Fixing block 2; 206. Gasket; 3. Buffer tube; 4. Mounting block; 5. Screw hole; 6. Bolt 2; 7. Elastic sealing ring; 8. Connecting rod; 9. Upper housing; 10. Metal reinforcing ring; 11. Lower housing; 12. Mounting hole; 13. Bearing; 14. End cap body; 15. Annular groove; 16. Ball bearing; 17. Fixing frame. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0026] Reference Figure 1 , Figure 3 and Figure 4This utility model provides an embodiment of a heavy-duty truck thrust rod end cap, including a fixing rod 1. Buffer tubes 3 are installed at both ends of the fixing rod 1. An end cap body 14 is fixedly connected to the end of each buffer tube 3. An annular groove 15 is formed on the inner side of the end cap body 14. An elastic sealing ring 7 is installed inside the annular groove 15. A metal reinforcing ring 10 is installed on the outer wall of the end cap body 14. An upper housing 9 is installed at the top of the metal reinforcing ring 10, and a lower housing 11 is installed at the bottom of the metal reinforcing ring 10. Multiple mounting holes 12 are equidistantly formed on the outer walls of both the upper housing 9 and the lower housing 11. A fixing mechanism 2 is installed on the inner wall of each mounting hole 12. The end cap body 14 is made of nylon 66 material and manufactured by injection molding. It has an annular groove 15 inside, into which an elastic sealing ring 7 made of fluororubber material is embedded. This sealing ring effectively provides a sealing effect. The metal reinforcing ring 10 is made of stainless steel. The buffer tube 3 is precisely embedded in the outer edge of the end cap body 14. During vehicle operation, vibration is inevitable. At this time, the buffer tube 3 can absorb most of the axial impact force. The damping characteristics of the end cap body 14 help reduce the transmission of vibration energy to the metal reinforcing ring 10, thereby reducing the impact of vibration on the metal reinforcing ring 10. The function of the metal reinforcing ring 10 is to limit the plastic deformation of the end cap body 14 under long-term load, maintain the pre-tightening force of the elastic sealing ring 7, and ensure that the sealing effect is not affected. When the elastic sealing ring 7 is subjected to radial compression force, it will fit tightly against the thrust rod journal, effectively blocking the intrusion of dust and moisture and protecting the internal mechanical parts from contamination. The fixing mechanism 2 is used to fix the upper housing 9, the lower housing 11, and the metal reinforcing ring 10 together to prevent the structure from loosening and being damaged. The outer wall of the buffer tube 3 is equipped with a mounting block 4, and the outer wall of the mounting block 4 is provided with screw holes 5. Specifically, the end cap body 14 is injection molded from nylon 66, and its inner wall is provided with an annular groove 15. The elastic sealing ring 7 is made of fluororubber and is nested in the annular groove 15. The metal reinforcing ring 10 is a stainless steel stamping part and is embedded in the outer edge of the end cap body 14. When the vehicle vibrates, the buffer tube 3 absorbs the axial impact, the damping characteristics of the end cap body 14 reduce the vibration energy transmitted to the metal reinforcing ring 10, the metal reinforcing ring 10 restricts the plastic deformation of the end cap body 14 under long-term load, maintains the preload of the sealing ring, and the elastic sealing ring 7 is tightly attached to the thrust rod journal under radial compression force to prevent dust and moisture from entering.

[0027] Reference Figure 3 , Figure 4 and Figure 5The fixing mechanism 2 includes a gasket 206, which is installed on the inner bottom wall of the mounting hole 12. A second fixing block 205 is installed on the top of the gasket 206, and a first fixing block 204 is installed on the top of the second fixing block 205. The first fixing block 204, the second fixing block 205, and the inner wall of the gasket 206 are threaded together with a bolt 203. A fixing ring 201 is installed on the outer side of the first fixing block 204, and a mounting groove 202 is opened on the inner side of the fixing ring 201. The first fixing block 204 is threadedly connected to the mounting groove 202. During installation, the gasket 206 should first be placed at the bottom of the mounting hole 12, and then the fixing blocks 204 should be inserted sequentially. Fixed block 204 and fixed block 205 are connected. Then, by screwing in bolt 203, which passes through washer 206 and enters the inner wall of metal reinforcing ring 10, a stable connection is achieved between upper housing 9 and lower housing 11 and metal reinforcing ring 10. This structure can not only protect the internal mechanical structure from damage and prevent loosening caused by vibration or impact, but also further enhance the sealing performance, effectively prevent external pollutants such as dust and moisture from entering the internal structure, ensure stable operation of equipment and extend its service life. Bolt 26 is threaded on the inner wall of screw hole 5, and fixed frame 17 is installed on the inner side of elastic sealing ring 7. Specifically, during installation, first place the gasket 206 at the bottom of the mounting hole 12, then install the fixing block 204 and fixing block 205 in sequence. Then, pass the bolt 203 through the gasket 206 and screw it into the inner wall of the metal reinforcing ring 10 to tightly connect the upper housing 9 and the lower housing 11 with the metal reinforcing ring 10. This structure not only protects the internal machinery from damage and prevents loosening caused by vibration or impact, but also enhances the sealing performance, prevents the intrusion of contaminants such as dust and moisture, and ensures stable operation and extended service life of the equipment.

[0028] Reference Figure 1 , Figure 2 and Figure 3 A bearing 13 is installed on the inner side of the fixed frame 17. Multiple balls 16 are rotatably connected to the inner side of the fixed frame 17. A connecting rod 8 is installed on the inner wall of the bearing 13. Specifically, the bearing 13 is fitted with the connecting rod 8 and rotates together with the connecting rod 8. The inner ring has a shaft hole machined on the inner side and a raceway on the outer side for the balls 16 to roll. The balls 16 transmit the load through rolling contact to reduce friction. The material is mostly high carbon chromium steel, and the surface is quenched to improve hardness and wear resistance. The inner side of the fixed frame 17 has a raceway, which together with the raceway of the bearing 13 constrains the movement trajectory of the balls 16.

[0029] Working principle: The end cap body 14 is manufactured from nylon 66 material through injection molding. It has an internal annular groove 15, in which an elastic sealing ring 7 is embedded. This sealing ring is made of fluororubber, a high-performance material, which effectively provides a seal. Simultaneously, a metal reinforcing ring 10, a part stamped from stainless steel, is precisely embedded into the outer edge of the end cap body 14. During vehicle operation, vibrations are inevitable. The buffer tube 3 absorbs most of the axial impact force, while the damping characteristics of the end cap body 14 help reduce the transmission of vibration energy to the metal reinforcing ring 10. The metal reinforcing ring 10 restricts the plastic deformation of the end cap body 14 under long-term load, thus maintaining the preload of the elastic sealing ring 7 and ensuring its sealing effect is not affected. When the elastic sealing ring 7 is subjected to radial compression, it fits tightly against the thrust rod journal, effectively preventing the intrusion of dust and moisture and protecting internal mechanical components from contamination. During installation, the gasket 206 is first placed at the bottom of the mounting hole 12, and then the fixing block 204 and fixing block 205 are inserted in sequence. Next, the bolt 203 is screwed in, which passes through the gasket 206 and enters the inner wall of the metal reinforcing ring 10, thereby firmly connecting the upper housing 9 and the lower housing 11 to the metal reinforcing ring 10. This structure not only protects the internal mechanical structure from damage and prevents loosening due to vibration or impact, but also further improves the sealing performance, effectively preventing external contaminants such as dust and moisture from entering the internal structure, ensuring stable operation of the equipment and extending its service life.

[0030] 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. A heavy-duty truck thrust rod end cap, comprising a fixing rod (1), characterized in that: The left and right ends of the fixed rod (1) are equipped with buffer tubes (3), and the end cap body (14) is fixedly connected to the end of the buffer tube (3). An annular groove (15) is provided on the inner side of the end cap body (14), and an elastic sealing ring (7) is installed on the inner side of the annular groove (15). A metal reinforcing ring (10) is installed on the outer wall of the end cap body (14). An upper shell (9) is installed on the top of the metal reinforcing ring (10), and a lower shell (11) is installed on the bottom of the metal reinforcing ring (10). Multiple mounting holes (12) are provided at equal intervals on the outer walls of the upper shell (9) and the lower shell (11). A fixing mechanism (2) is installed on the inner wall of the mounting hole (12). The fixing mechanism (2) is used to fix the upper shell (9), the lower shell (11) and the metal reinforcing ring (10) together to prevent the structure from loosening and being damaged.

2. The heavy-duty truck thrust rod end cap according to claim 1, characterized in that: The fixing mechanism (2) includes a gasket (206), which is installed on the inner bottom wall of the mounting hole (12). A second fixing block (205) is installed on the top of the gasket (206), and a first fixing block (204) is installed on the top of the second fixing block (205). A bolt (203) is threadedly connected to the first fixing block (204), the second fixing block (205), and the inner wall of the gasket (206). A fixing ring (201) is installed on the outer side of the first fixing block (204), and an mounting groove (202) is opened on the inner side of the fixing ring (201). The first fixing block (204) is threadedly connected to the mounting groove (202).

3. The heavy-duty truck thrust rod end cap according to claim 1, characterized in that: The outer wall of the buffer tube (3) is equipped with an installation block (4), which is installed on the left and right sides of the outer wall of the buffer tube (3).

4. The heavy-duty truck thrust rod end cap according to claim 3, characterized in that: The mounting block (4) has screw holes (5) on its outer wall, and the screw holes (5) are equally spaced on the front and back sides of the outer wall of the mounting block (4).

5. The heavy-duty truck thrust rod end cap according to claim 4, characterized in that: The inner wall of the screw hole (5) is threaded with a bolt two (6), which is threaded onto the inner wall of the buffer tube (3).

6. The heavy-duty truck thrust rod end cap according to claim 1, characterized in that: A fixing frame (17) is installed inside the elastic sealing ring (7), and a bearing (13) is installed inside the fixing frame (17).

7. The heavy-duty truck thrust rod end cap according to claim 6, characterized in that: The bearing (13) is rotatably connected to the inner side of the fixed frame (17) with a plurality of balls (16), and the fixed frame (17) constrains the movement trajectory of the balls (16).

8. The heavy-duty truck thrust rod end cap according to claim 7, characterized in that: A connecting rod (8) is installed on the inner wall of the bearing (13). The connecting rod (8) is fixedly connected to the bearing (13) and rotates together with the bearing (13).

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