Die-cast special-shaped aluminum bushing

Abstract

The invention discloses a die-cast special-shaped aluminum bushing, which relates to the technical field of bushings and comprises an inner core, two ends of the inner core are respectively sleeved with a locking block and a shell, the outer wall of an annular boss is in threaded connection with the inner wall of the shell, and the die-cast special-shaped aluminum bushing further comprises a reinforcing mechanism; through the arrangement of the reinforcing mechanism, after the annular boss is in threaded connection with the shell, if the elastic limiting structure is not aligned with the positioning hole, the position of the elastic limiting structure can be rapidly adjusted through a switching ring which is arranged outside the locking block in a surrounding and rotating sleeving mode till the elastic limiting structure accurately corresponds to the positioning hole in the end face of the shell; then air is injected into a cavity of the switching ring through an air injection structure on the top end face of the switching ring, an elastic limiting structure arranged in the fixing sleeve is driven by air pressure to stretch out and be inserted into a positioning hole, and secondary reinforcing fixing of threaded connection of the annular boss and the shell is formed. And thread loosening caused by high-frequency vibration is effectively prevented.

Description

Technical Field

[0001] This invention relates to the field of bushing technology, specifically to a die-cast irregular-shaped aluminum bushing. Background Technology

[0002] Due to the lightweight, corrosion-resistant, and thermally conductive properties of aluminum alloys, shaped aluminum bushings have become key basic components in automotive transmission systems, hydraulic components of engineering machinery, and general mechanical connection parts. Their core function is to achieve precise positioning between components, reduce relative motion wear, and buffer vibration and impact, directly affecting the operational stability and service life of equipment.

[0003] As modern industry develops towards higher speeds, heavier loads, and longer lifespans, the operating conditions of irregularly shaped aluminum bushings are becoming increasingly demanding. This places higher requirements not only on structural adaptability and dimensional accuracy, but also on wear resistance and continuous lubrication. To address the insufficient wear resistance of traditional bushings, existing technologies have developed wear-resistant irregularly shaped bushings, such as the one disclosed in the invention patent with authorization announcement number CN222351189U. This bushing employs a structural design that uses a sponge-like structure on the inner wall of the core to store oil, a cavity in the outer shell to supply oil, and through-holes to guide oil, attempting to improve lubrication and reduce wear. Simultaneously, a threaded cap assembly is used to seal the lubricating oil within the cavity.

[0004] However, this existing technology still has insurmountable defects in practical applications, and combined with the limitations of existing molding processes, it cannot meet the needs of use under complex working conditions. This existing technology uses a cap assembly with a ring boss and a threaded connection to the inner wall of the cavity to seal the lubricating oil. However, its threaded connection structure lacks an effective anti-loosening design under the high-frequency vibration conditions of the equipment operation. After long-term use, the threads are prone to loosening. This problem directly leads to the leakage of lubricating oil in the cavity. On the one hand, it pollutes the working environment and affects the cleanliness and normal operation of the surrounding parts of the equipment. On the other hand, it directly interrupts the lubrication supply to the sponge, causing the bushing and the workpiece to lose lubrication protection, quickly triggering dry friction, aggravating bushing wear, and even causing premature bushing failure, which seriously weakens its original expected wear resistance and service life. Summary of the Invention

[0005] To solve the above-mentioned technical problems, a die-cast irregular aluminum bushing is provided, which solves the problems existing in the prior art.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a die-cast irregular aluminum bushing, including an inner core, with a locking block and an outer shell respectively fitted at both ends of the inner core, an annular boss provided on the end face of the locking block facing the outer shell, the outer wall of the annular boss being threadedly connected to the inner wall of the outer shell, and also including a reinforcing mechanism for preventing loosening between the annular boss and the outer shell.

[0007] The reinforcing mechanism includes a switching ring with an internal cavity that can rotate around the outside of the locking block, several fixed sleeves that are fixedly inserted around the inner wall of the bottom end of the switching ring, and an elastic limiting structure provided in the fixed sleeves. The outer shell has a positioning hole corresponding to the elastic limiting structure at one end facing the locking block, and the top surface of the switching ring has an air injection structure.

[0008] The outer wall of the locking block is fixedly fitted with a toothed ring, and the switching ring is also provided with an elastic locking structure that cooperates with the toothed ring.

[0009] Preferably, the elastic positioning element is an I-shaped positioning pin that can be elastically slidably inserted into the fixed sleeve.

[0010] Preferably, the air injection structure is an air injection nozzle, and the air injection nozzle has a built-in valve core.

[0011] Preferably, a return spring and a fixing ring are sleeved on the outer side of the I-shaped positioning pin. One end of the return spring abuts against the stepped surface of the I-shaped positioning pin, and the other end is fixed to the fixing ring. The outer wall of the fixing ring is fixed to the inner wall of the fixing sleeve. A sealing ring that fits tightly against the inner wall of the fixing sleeve is fixedly sleeved on the outer wall of the top of the I-shaped positioning pin.

[0012] Preferably, the elastic locking structure includes a pressure-bearing airbag fixed to the inner wall of the switching ring, and a horizontal locking pin is provided on the inner side of the pressure-bearing airbag. One end of the locking pin is fixed to the inner wall of the pressure-bearing airbag, and the other end of the locking pin faces the toothed ring and passes through the switching ring.

[0013] Preferably, the outer wall of the locking block is further fixed with an annular rail, and an anti-disengagement ring is slidably provided inside the annular rail and fixed to the inner wall of the switching ring.

[0014] Compared with the prior art, the advantages of the present invention are as follows: By strengthening the mechanism, if the elastic limiting structure and the positioning hole are not aligned after the annular boss and the outer shell are threaded together, the position of the elastic limiting structure can be quickly adjusted by rotating the switching ring sleeved around the locking block until it precisely corresponds to the positioning hole on the end face of the outer shell; then, air is injected into its cavity through the air injection structure on the top surface of the switching ring, and the air pressure drives the elastic limiting structure set in the fixed sleeve to extend and insert into the positioning hole, forming a secondary strengthening and fixing of the threaded connection between the annular boss and the outer shell. This strengthening mechanism effectively prevents the threads from loosening due to high-frequency vibration through the dual fixing method of "threaded connection + elastic limiting". Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 This is a schematic diagram of the separation structure of the present invention;

[0017] Figure 3 This is a schematic diagram of the internal structure of the switching coil of the present invention;

[0018] Figure 4 This is a schematic diagram of the internal structure of the present invention;

[0019] Figure 5 For the present invention Figure 4 Schematic diagram of the structure at point A in the middle;

[0020] Figure 6 This is a schematic diagram of the elastic positioning component structure of the present invention.

[0021] The numbers on the map are:

[0022] 1. Inner core; 2. Locking block; 3. Outer shell; 4. Cavity; 5. Sponge body; 6. Switching ring; 7. Gear ring; 8. Locking pin; 9. Pressure-bearing airbag; 10. Air inlet; 11. Circular rail; 12. Anti-disengagement ring; 13. Fixing sleeve; 14. Positioning hole; 15. I-shaped positioning pin; 16. Sealing ring; 17. Fixing ring; 18. Return spring. Detailed Implementation

[0023] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0024] Reference Figure 1-6 As shown, a die-cast aluminum bushing includes an inner core 1 and a sponge 5 disposed on the inner wall of the inner core 1. Locking blocks 2 and outer shells 3 are respectively fitted at both ends of the inner core 1. A cavity 4 is provided between the inner wall of the outer shell 3 and the outer wall of the inner core 1. An annular boss is provided on the end face of the locking block 2 facing the outer shell 3. The outer wall of the annular boss is threadedly connected to the inner wall of the outer shell 3.

[0025] An annular groove is formed on the inner wall of the inner core 1, and the sponge 5 is located in the annular groove. Several through holes connected to the annular groove are formed around the outer wall of the inner core 1.

[0026] Referring to patent publication number CN222351189U, entitled "A Wear-Resistant Shaped Bushing," the above structure is the core component of the wear-resistant shaped bushing disclosed in this patent. Its design aims to achieve lubrication and wear resistance through the cooperation of "inner core 1 - sponge 5 - outer shell 3 - cavity 4." The annular groove on the inner wall of the inner core 1 is used to position and install the sponge 5, which acts as an oil storage carrier, absorbing and continuously releasing lubricating oil. The cavity 4 between the outer shell 3 and the inner core 1 stores lubricating oil, while the through hole on the outer wall of the inner core 1 serves as an oil guide channel, guiding the lubricating oil from the cavity 4 into the sponge 5. The annular boss on the end face of the locking block 2, connected to the threaded connection with the inner wall of the outer shell 3, is a key structure in this patent for sealing the cavity 4 and preventing lubricating oil leakage. The threaded fastening achieves the sealing of the cavity 4, ensuring that lubricating oil can be continuously supplied to the sponge 5 through the through hole, ultimately improving the lubrication effect between the bushing and the workpiece and reducing wear.

[0027] Furthermore, referring to Figure 4-6 As shown, it is worth noting that a reinforcing mechanism is also included to prevent loosening between the annular boss and the housing 3.

[0028] The reinforcing mechanism includes a switching ring 6 with an internal cavity that can rotate around the outside of the locking block 2, several fixing sleeves 13 that are fixedly inserted around the inner wall of the bottom end of the switching ring 6, and an elastic limiting structure provided in the fixing sleeves 13. The outer shell 3 has a positioning hole 14 corresponding to the elastic limiting structure at one end facing the locking block 2, and the top surface of the switching ring 6 is provided with an air injection structure.

[0029] By strengthening the mechanism, if the elastic limiting structure is not aligned with the positioning hole 14 after the annular boss and the outer shell 3 are threaded together, the position of the elastic limiting structure can be quickly adjusted by rotating the switching ring 6 around the locking block 2 until it precisely corresponds to the positioning hole 14 on the end face of the outer shell 3. Then, air is injected into its cavity through the air injection structure on the top surface of the switching ring 6, and the air pressure drives the elastic limiting structure located in the fixed sleeve 13 to extend and insert into the positioning hole 14, forming a secondary reinforcement and fixation of the threaded connection between the annular boss and the outer shell 3. This strengthening mechanism not only effectively prevents the threads from loosening due to high-frequency vibration through the dual fixation method of "threaded connection + elastic limiting", but also...

[0030] Furthermore, referring to Figure 4-6 As shown, it is worth noting that the elastic positioning element is an I-shaped positioning pin 15 that can be elastically slidably inserted into the fixed sleeve 13. A return spring 18 and a fixing ring 17 are sleeved on the outside of the I-shaped positioning pin 15. One end of the return spring 18 abuts against the stepped surface of the I-shaped positioning pin 15, and the other end is fixed to the fixing ring 17. The outer wall of the fixing ring 17 is fixed to the inner wall of the fixed sleeve 13. A sealing ring 16 that fits tightly against the inner wall of the fixed sleeve 13 is fixedly sleeved on the outer wall of the top of the I-shaped positioning pin 15.

[0031] With the elastic positioning element, during air injection, the air pressure pushes the I-shaped positioning pin 15 down along the fixed sleeve 13 and inserts it into the positioning hole 14, forming a mechanical lock to prevent the threads from loosening due to high-frequency vibration. During this process, the return spring 18 contracts to store energy, while the fixing ring 17 restricts the spring's offset to prevent the I-shaped positioning pin 15 from getting stuck. The sealing ring 16 fits tightly against the inner wall of the fixed sleeve 13, preventing air pressure leakage to ensure effective drive and blocking lubricating oil from seeping in to protect the spring's performance. During maintenance, only air needs to be released, and the return spring 18 can push the I-shaped positioning pin 15 back to its original position, allowing the fixing to be released without disassembling the entire structure.

[0032] Furthermore, referring to Figure 4-6 As shown, it is worth noting that the air injection structure is an air injection nozzle 10, and the air injection nozzle 10 has a built-in valve core.

[0033] The air injection nozzle 10 serves two purposes: firstly, it acts as an air injection interface, allowing an external air pump to inject air into the cavity of the switching ring 6, providing pneumatic power for the drive of the elastic positioning component; secondly, its built-in valve core enables one-way sealing, automatically blocking reverse air pressure leakage after air injection, ensuring stable air pressure within the switching ring 6, guaranteeing the continuous insertion of the elastic positioning component into the positioning hole 14, and achieving long-term secondary fixation of the threaded connection; when subsequent maintenance requires air release, simply pressing the valve core releases the air pressure, making the operation convenient and requiring no disassembly of the overall structure.

[0034] Furthermore, referring to Figure 4-6 As shown, it is worth noting that the outer wall of the locking block 2 is fixedly fitted with a toothed ring 7, and the switching ring 6 is also provided with an elastic locking structure that cooperates with the toothed ring 7.

[0035] The elastic locking structure includes a pressure airbag 9 fixed to the inner wall of the switching ring 6. The inner side of the pressure airbag 9 is provided with a horizontal locking pin 8. One end of the locking pin 8 is fixed to the inner wall of the pressure airbag 9, and the other end of the locking pin 8 faces the toothed ring 7 and passes through the switching ring 6.

[0036] With the elastic locking structure, once the position of the switching ring 6 is determined, the pressure-bearing airbag 9 on its inner wall can deform, pushing the horizontal locking pin 8 toward the toothed ring 7, so that the locking pin 8 and the toothed ring 7 are engaged. This effectively restricts the subsequent accidental rotation of the switching ring 6, ensuring that the elastic positioning component is always accurately aligned with the positioning hole 14, and preventing the elastic positioning component from being unable to be smoothly inserted into the positioning hole 14 due to the offset of the switching ring 6. This ensures the secondary fixing effect of the threaded connection between the annular boss and the outer shell 3, and further enhances the overall stability of the structure under high-frequency vibration conditions.

[0037] Furthermore, referring to Figure 3As shown, it is worth noting that the outer wall of the locking block 2 is also fixed with a ring-shaped annular rail 11, and an anti-disengagement ring 12 that is fixed to the inner wall of the switching ring 6 is slidably provided in the annular rail 11.

[0038] By setting the annular rail 11 and the anti-detachment ring 12, the movement trajectory of the switching ring 6 can be precisely constrained. The annular rail 11 provides a sliding track for the anti-detachment ring 12, which can ensure that the switching ring 6 can rotate smoothly around the locking block 2, and strictly limit the movement of the switching ring 6 along the axial direction of the locking block 2.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A die-cast shaped aluminum bushing, comprising an inner core (1), wherein a locking block (2) and a shell (3) are respectively fitted at both ends of the inner core (1), and an annular boss is provided on the end face of the locking block (2) facing the shell (3), the outer wall of the annular boss being threadedly connected to the inner wall of the shell (3), characterized in that, It also includes a reinforcing mechanism to prevent loosening between the annular boss and the housing (3); The strengthening mechanism includes a switching ring (6) with an internal cavity that can rotate around the outside of the locking block (2), a plurality of fixing sleeves (13) that are fixedly inserted around the inner wall of the bottom end of the switching ring (6), and an elastic limiting structure provided in the fixing sleeves (13). The outer shell (3) has a positioning hole (14) corresponding to the elastic limiting structure at one end facing the locking block (2), and the top surface of the switching ring (6) is provided with an air injection structure. The outer wall of the locking block (2) is fixedly fitted with a toothed ring (7), and the switching ring (6) is also provided with an elastic locking structure that cooperates with the toothed ring (7).

2. The die-cast irregular-shaped aluminum bushing according to claim 1, characterized in that, The elastic positioning element is an I-shaped positioning pin (15) that can be elastically slidably inserted into the fixed sleeve (13).

3. The die-cast irregular-shaped aluminum bushing according to claim 1, characterized in that, The air injection structure is an air injection nozzle (10), and the air injection nozzle (10) has a built-in valve core.

4. The die-cast irregular-shaped aluminum bushing according to claim 2, characterized in that, The outer side of the I-shaped positioning pin (15) is fitted with a return spring (18) and a fixing ring (17). One end of the return spring (18) abuts against the stepped surface of the I-shaped positioning pin (15), and the other end is fixed to the fixing ring (17). The outer wall of the fixing ring (17) is fixed to the inner wall of the fixing sleeve (13). The outer wall of the top of the I-shaped positioning pin (15) is fitted with a sealing ring (16) that fits tightly against the inner wall of the fixing sleeve (13).

5. The die-cast irregular-shaped aluminum bushing according to claim 1, characterized in that, The elastic locking structure includes a pressure airbag (9) fixed to the inner wall of the switching ring (6). The inner side of the pressure airbag (9) is provided with a horizontal locking pin (8). One end of the locking pin (8) is fixed to the inner wall of the pressure airbag (9), and the other end of the locking pin (8) faces the toothed ring (7) and passes through the switching ring (6).

6. The die-cast irregular-shaped aluminum bushing according to claim 1, characterized in that, The outer wall of the locking block (2) is also fixed with a ring-shaped annular rail (11), and an anti-disengagement ring (12) is slidably provided inside the annular rail (11) and fixed to the inner wall of the switching ring (6).

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