A kind of auxiliary tool for sealing and plugging of wheel hub assembly air duct air tightness detection

Abstract

This application discloses an auxiliary tooling for sealing and testing the air tightness of a wheel hub assembly's air passage, relating to the field of air tightness testing technology. It includes: a positioning seat for placing the wheel hub assembly; a partition plate on the positioning seat; and bolts connecting the positioning seat, partition plate, and pressure plate. Two opposing sealing groups are fitted onto the bolts between the partition plate and the pressure plate. The ends of the variable-diameter bodies in the two sealing groups, with their far ends abutting against the partition plate and the pressure plate respectively, and their near ends abutting against a baffle plate, are fitted between the baffle plate and the bolts. A rubber sleeve is placed around the variable-diameter bodies. When the nut and bolt are tightened to press down the pressure plate, the diameter of the variable-diameter bodies increases, pushing the rubber sleeves outwards. The two rubber sleeves then abut against the inner diameter of the oil seal seat rings. This solves the problems existing in current wheel hub assembly air passage air tightness testing processes, avoids damage to the seals during testing, improves the accuracy of test results, reduces manual labor intensity, increases testing efficiency, and meets production needs.

Description

Technical Field

[0001] This application relates to the field of airtightness testing technology, and in particular to an auxiliary tooling for sealing and testing the airtightness of a wheel hub assembly air passage. Background Technology

[0002] The following issues exist in the current process of testing the air tightness of the air ducts in wheel hub assemblies: 1. Quality issues. For example... Figure 4 and Figure 5 As shown, the original sealing method imitates the sealing method of the product, which requires overcoming the squeezing and friction between the O-ring and the oil seal seat. During installation and disassembly, the O-ring is easily damaged, which leads to inaccurate or failed test results, and in turn leads to rework and repair problems in subsequent processes. 2. Efficiency issues. The original sealing method imitates the product's sealing method, which is very difficult to install and remove. In the process of installing the sealing auxiliary tooling into the oil seal hole, it is necessary to overcome the squeezing and friction forces between the O-ring and the oil seal seat ring, which is time-consuming and labor-intensive, making it difficult to meet production needs. It has problems such as high labor intensity, low efficiency, and impact on production cycle.

[0003] Therefore, a tooling for airtightness testing is needed to solve the problems existing in the current process of testing the airtightness of wheel hub assembly air passages, avoid damage to seals during testing, improve the accuracy of test results, reduce manual labor intensity, improve testing efficiency, and meet production needs. Utility Model Content

[0004] To address the aforementioned problems, prevent damage to seals during testing, improve the accuracy of test results, reduce manual labor intensity, increase testing efficiency, and meet production needs, this application provides an auxiliary tooling for sealing and testing the air tightness of wheel hub ducts.

[0005] The auxiliary tooling for air tightness testing and sealing of the air passage of a wheel hub assembly provided in this application adopts the following technical solution.

[0006] An auxiliary tooling for air tightness testing and sealing of a wheel hub assembly air passage includes: a positioning seat and a pressure plate. The positioning seat is used to place the wheel hub assembly and is provided with a partition. The positioning seat, partition, and pressure plate are connected by bolts. Two oppositely arranged sealing groups are fitted on the bolts between the partition and the pressure plate. Each sealing group includes a variable diameter body, a baffle, and a rubber ring. The ends of the variable diameter bodies in the two sealing groups that are far apart abut against the partition and the pressure plate, respectively. The ends of the variable diameter bodies in the two sealing groups that are close together abut against the baffle. A rubber sleeve is provided between the baffle and the bolt, and the rubber ring is fitted around the variable diameter body. The bolt is fitted with a nut. When the nut and the bolt are tightened together and the pressure plate is pressed down, the two reducing bodies are squeezed, causing the diameter of the reducing bodies to increase and push the rubber rings outward. The two rubber rings respectively abut against the inner diameter of the oil seal seat ring.

[0007] By adopting the above technical solution, the positioning seat can be used to place the wheel hub assembly, and stable placement improves operational convenience and safety. Through the cooperation of the pressure plate, partition, bolts, and nuts, tightening the nuts causes the pressure plate and partition to press against each other, thereby compressing the two sealing assemblies. This increases the diameter of the variable-diameter body in the sealing assembly, pushing the rubber rings outward. The outer walls of the two rubber rings abut against the inner diameters of the two oil seal seats, ensuring a tight seal and preventing gas leakage at the connection between the rubber ring outer wall and the oil seal seats. Furthermore, the rubber sleeves, placed back-to-back, are also compressed and deformed, ensuring that the gaps between the bolts, baffles, and rubber sleeves are completely sealed, preventing gas leakage. This ensures that the entire auxiliary tooling, the wheel hub assembly's oil seal assembly, oil seal seats, and air passage form a completely sealed cavity. By connecting the air passage to an air supply source, the sealing performance of the entire wheel hub assembly's air passage can be tested.

[0008] Optionally, a pressure block is provided on the bolt above the pressure plate, and the nut is provided on the bolt above the pressure block.

[0009] By adopting the above technical solution, the setting of the pressure block facilitates the rotation and tightening of the nut to press the pressure plate, and also serves as a pad.

[0010] Optionally, the bolt passes through the pressure plate, sealing assembly, and partition, and its bottom threadedly engages with the positioning seat.

[0011] By adopting the above technical solution, bolts connect all components, and finally, pneumatic or electric wrenches can be used to tighten the nuts to secure the auxiliary tooling. This reduces labor intensity, facilitates assembly, and improves testing efficiency.

[0012] Optionally, the end of the rubber ring is sealed to the baffle.

[0013] By adopting the above technical solution, air leakage between the rubber ring and the baffle is avoided, ensuring airtightness.

[0014] Optionally, the top of the positioning seat is provided with a first support portion for abutting against the oil seal seat ring.

[0015] By adopting the above technical solution, the first support can support the oil seal seat from the bottom, avoiding the oil seal seat being damaged and detached from the wheel hub assembly due to downward pressure of air pressure during ventilation testing, which is beneficial to improving the protection of the seal.

[0016] Optionally, the bottom edge of the pressure plate is provided with a second support portion protruding downwards. The bottom of the second support portion is used to abut against the oil seal seat ring, and the inner diameter of the second support portion is used to abut against the outer diameter of the oil seal seat ring.

[0017] By adopting the above technical solution, the bottom of the second support part is used to abut against the oil seal seat ring, so as to avoid the air pressure squeezing the oil seal seat ring upward during the ventilation test, causing damage to the oil seal seat ring and separation from the wheel hub assembly. The inner diameter of the second support part is used to abut against the outer diameter of the oil seal seat ring, that is, to support the oil seal seat ring from the outside, so as to avoid the oil seal seat ring being excessively squeezed when the diameter of the variable body increases, which is conducive to improving the protection of the seal and ensuring that the rubber ring and the oil seal seat ring fit tightly together.

[0018] Optionally, the variable diameter body includes a central convex spring, wherein when both ends of the central convex spring are compressed, the central diameter expands outward.

[0019] By adopting the above technical solution, the convex spring has a simple structure and stable and reliable deformation.

[0020] Optionally, the auxiliary tooling also includes an air supply pipe for connecting to the air passage of the wheel hub assembly, the air supply pipe being used to connect to an air supply source, and the air supply pipe being equipped with a valve and a pressure gauge.

[0021] By adopting the above technical solution, and through the setting of valves and pressure gauges, it is convenient to control the operation during testing and obtain more intuitive and accurate test parameters.

[0022] Optionally, the hub assembly is mounted on a positioning seat, and the top of the positioning seat abuts against the shoulder of the inner bore of the hub assembly used to house the oil seal assembly.

[0023] In summary, this application includes at least the following beneficial effects: The positioning seat in this application can be used to place the wheel hub assembly, and stable placement improves operational convenience and safety. Through the cooperation of the pressure plate, partition, bolts, and nuts, tightening the nuts causes the pressure plate and partition to press against each other, thereby compressing the two sealing assemblies. This increases the diameter of the variable-diameter element in the sealing assembly, pushing the rubber rings outward. The outer walls of the two rubber rings abut against the inner diameters of the two oil seal seats, ensuring a tight seal and preventing gas leakage at the connection between the rubber ring outer wall and the oil seal seats. Furthermore, the rubber sleeves, placed back-to-back, are also compressed and deformed, ensuring that the gaps between the bolts, baffles, and rubber sleeves are completely sealed, preventing gas leakage. This ensures that the entire auxiliary tooling, the wheel hub assembly's oil seal assembly, oil seal seats, and air passage form a completely sealed cavity, preventing damage to the seals during assembly. By connecting the air passage to the air supply, the sealing performance of the entire wheel hub assembly's air passage can be tested. Bolts connect all the components, and finally, pneumatic or electric wrenches can be used to tighten the nuts to secure the auxiliary tooling. This reduces labor intensity, facilitates assembly, and improves testing efficiency. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of an auxiliary tooling (after assembly) for sealing and testing the air tightness of the air passage in a wheel hub assembly.

[0026] Figure 2 This is a schematic diagram of the structure of an auxiliary tooling for sealing and testing the air tightness of a wheel hub assembly air passage (after assembly and tightening the nut).

[0027] Figure 3 This is a schematic diagram of the auxiliary tooling for sealing and testing the air tightness of the air passage in a wheel hub assembly.

[0028] Figure 4 and Figure 5 This is a schematic diagram of the original sealing method.

[0029] Figure 6 This is a schematic diagram of the wheel hub assembly structure.

[0030] Explanation of reference numerals in the attached drawings: 1. Positioning seat; 2. Bolt; 3. Pressure plate; 4. Partition plate; 5. Pressure block; 6. Nut; 7. Convex spring; 8. Baffle plate; 9. Rubber ring; 10. Rubber sleeve; 11. Second support part; 12. Air source pipe; 13. Valve; 14. Air pressure gauge; 15. Wheel hub assembly; 16. Oil seal seat ring; 17. Oil seal assembly; 18. Air passage. Detailed Implementation

[0031] 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.

[0032] The following is in conjunction with the appendix Figures 1 to 3 Section 6 provides further detailed description of this application.

[0033] This application discloses an auxiliary tooling for sealing and testing the air tightness of the air passage in a wheel hub assembly.

[0034] Reference Figures 1 to 3 6. An auxiliary tooling for sealing and testing the air tightness of the air passage of a wheel hub assembly, comprising: a positioning seat 1, a pressure plate 3, a partition 4, a convex spring 7, a rubber ring 9, a rubber sleeve 10, a baffle 8, a pressure block 5, a bolt 2, and a nut 6.

[0035] The positioning seat 1 is used to place the wheel hub assembly 15. A first support portion is provided on the top of the positioning seat 1. The wheel hub assembly 15 is fitted onto the first support portion. The top of the first support portion abuts against the shoulder of the inner hole of the wheel hub assembly 15, which is used to house the oil seal assembly 17. The top of the first support portion also abuts against the bottom of the oil seal seat ring 16. The first support portion can support the oil seal seat ring 16 from the bottom, preventing air pressure from squeezing the oil seal seat ring 16 downwards during ventilation testing, thus avoiding damage to the oil seal seat ring 16 and its detachment from the wheel hub assembly 15, and improving the protection of the seal.

[0036] Bolt 2 connects positioning seat 1 and pressure plate 3. A partition plate 4 is fitted on bolt 2 above positioning seat 1. Two oppositely arranged sealing groups are fitted on bolt 2 between partition plate 4 and pressure plate 3. A pressure block 5 is provided on bolt 2 above pressure plate 3. Nut 6 is provided on bolt 2 above pressure block 5. The setting of pressure block 5 makes it easy to rotate and tighten nut 6 to press pressure plate 3, and also serves as a pad.

[0037] The sealing assembly includes a reducing body, a baffle 8, and a rubber ring 9. The ends of the reducing bodies in the two sealing assemblies that are furthest apart abut against the partition 4 and the pressure plate 3, respectively. The ends of the reducing bodies that are closest together abut against the baffle 8. A rubber sleeve 10 is provided between the baffle 8 and the bolt 2; that is, the baffle 8 is fitted onto the bolt 2, and the rubber sleeve 10 provides a seal. The rubber ring 9 is fitted around the reducing body. When the nut 6 is tightened in conjunction with the bolt 2 and the pressure plate 3 is pressed down, the two reducing bodies are squeezed, causing their diameters to increase and pushing the rubber ring 9 outwards. The two rubber rings 9 abut against the inner diameter of the oil seal seat ring 16.

[0038] The variable diameter body can be a convex spring 7. When the two ends of the convex spring 7 are compressed, the diameter in the middle expands outward. The convex spring 7 has a simple structure, is easy to assemble, and has stable and reliable deformation.

[0039] The end of the rubber ring 9 is sealed to the baffle 8 to prevent air leakage between the rubber ring 9 and the baffle 8 and ensure airtightness.

[0040] The bottom edge of the pressure plate 3 protrudes downwards and is provided with a second support part 11. The bottom of the second support part 11 is used to abut against the oil seal seat ring 16, and the inner diameter of the second support part 11 is used to abut against the outer diameter of the oil seal seat ring 16. The bottom of the second support part 11 abuts against the oil seal seat ring 16 to prevent the air pressure from squeezing the oil seal seat ring 16 upwards during ventilation testing, which could cause damage to the oil seal seat ring 16 and cause it to detach from the wheel hub assembly 15. The inner diameter of the second support part 11 abuts against the outer diameter of the oil seal seat ring 16, that is, it supports the oil seal seat ring 16 from the outside, preventing the oil seal seat ring 16 from being excessively squeezed when the diameter of the variable body increases. This helps to improve the protection of the seal and also ensures that the rubber ring 9 and the oil seal seat ring 16 fit tightly together.

[0041] Bolt 2 passes through pressure plate 3, sealing assembly, and partition 4. The bottom of bolt 2 is threaded with positioning seat 1. Bolt 2 connects all the parts. Finally, nut 6 can be tightened with a pneumatic or electric wrench to tighten and fix the auxiliary tooling. It has low labor intensity, convenient assembly operation, and improves testing efficiency.

[0042] The auxiliary tooling also includes an air source pipe 12 for connecting to the air passage 18 on the wheel hub assembly 15. The air source pipe 12 is used to connect to the air supply source. A valve 13 and a pressure gauge 14 are provided on the air source pipe 12. The valve 13 and the pressure gauge 14 facilitate the control operation during testing and obtain more intuitive and accurate test parameters.

[0043] The positioning seat 1 in this application can be used to place the wheel hub assembly 15, and stable placement is beneficial to improving the convenience and safety of operation. Through the cooperation of pressure plate 3, partition plate 4, bolt 2 and nut 6, tightening nut 6 can cause pressure plate 3 and partition plate 4 to squeeze each other, thereby compressing the two sealing groups. This increases the diameter of the variable body in the sealing group and pushes the rubber ring 9 outward. The outer walls of the two rubber rings 9 abut against the inner diameter of the two oil seal seat rings 16 and fit tightly to seal, thus ensuring that no gas escapes at the connection between the outer wall of the rubber ring 9 and the oil seal seat ring 16. Furthermore, through the setting of rubber sleeve 10, the two back-to-back rubber sleeves 10 are also squeezed and deformed, thus ensuring that the gap between bolt 2, baffle 8 and rubber sleeve 10 is completely sealed, ensuring that no gas escapes here. This ensures that the entire auxiliary tooling, the oil seal assembly 17 of the wheel hub assembly 15, the oil seal seat ring 16 and the air passage form a completely closed cavity. By connecting the air passage to the air supply source, the sealing performance of the air passage 18 of the entire wheel hub assembly 15 can be tested.

[0044] Inspection process: First, place the positioning seat 1 on the workbench, then place the hub assembly 15, with the oil seal assembly 17 and oil seal seat ring 16 assembled, onto the positioning seat 1; assemble the partition 4, the convex spring 7, the rubber ring 9, the baffle 8, the rubber sleeve 10 (back to back), the baffle 8, the rubber ring 9, the convex spring 7, the pressure plate 3, the pressure block 5, and the nut 6 in sequence, then connect all the parts with bolts 2, and finally tighten the auxiliary fixture using a pneumatic or electric wrench; during the tightening of the nut 6, the nut 6 will cause the pressure block 5, pressure plate 3, and other parts to move downwards, from... The compression deformation of the convex spring 7 causes the rubber ring 9 to expand radially, resulting in a tight seal between the outer wall of the rubber ring 9 and the inner hole of the oil seal seat 16. This ensures that no gas escapes from the connection between the outer wall of the rubber ring 9 and the oil seal seat 16. Additionally, the two back-to-back rubber sleeves 10 are also compressed and deformed, ensuring that the gaps between the bolt 2, baffle 8, and rubber sleeves 10 are completely sealed, preventing gas leakage. At this point, connecting the air supply pipe 12 to the air inlet of the air passage 18 ensures that the entire auxiliary fixture and the air supply pipe 12 form a completely sealed cavity. Opening the air supply and valve 13 allows for testing of the sealing performance of the air passage 18 of the entire wheel hub assembly 15.

[0045] In the description of this utility model, it should be understood that the terms "bottom," "top," "above," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise specified and limited, it should be noted that the term "connection" should be interpreted broadly, for example, it can be a mechanical connection or an electrical connection, or it can be a connection within two components, which can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0046] The above are merely preferred embodiments of the utility model and are not intended to limit the utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the utility model should be included within the protection scope of the utility model.

Claims

1. A kind of wheel hub assembly airway air tightness detection plugging auxiliary tool, it is characterized in that, include: The system includes a positioning seat and a pressure plate. The positioning seat is used to place the wheel hub assembly and is equipped with a partition. The positioning seat, partition, and pressure plate are connected by bolts. Two opposing sealing groups are fitted onto the bolts between the partition and the pressure plate. Each sealing group includes a variable diameter body, a baffle, and a rubber ring. The ends of the variable diameter bodies in the two sealing groups that are far apart abut against the partition and the pressure plate, respectively. The ends of the variable diameter bodies in the two sealing groups that are close together abut against the baffle. A rubber sleeve is provided between the baffle and the bolt, and the rubber ring is fitted around the variable diameter body. The bolt is fitted with a nut. When the nut and the bolt are tightened together and the pressure plate is pressed down, the two reducing bodies are squeezed, causing the diameter of the reducing bodies to increase and push the rubber rings outward. The two rubber rings respectively abut against the inner diameter of the oil seal seat ring.

2. The auxiliary tool for sealing and detecting air tightness of a wheel hub assembly air duct according to claim 1, characterized in that, A pressure block is provided on the bolt above the pressure plate, and the nut is provided on the bolt above the pressure block.

3. The auxiliary tool for sealing and detecting air tightness of a wheel hub assembly air duct according to claim 1, characterized in that, The bolt passes through the pressure plate, sealing assembly, and partition, and its bottom threadedly engages with the positioning seat.

4. The auxiliary tool for sealing and detecting air tightness of a wheel hub assembly air duct according to claim 1, characterized in that, The end of the rubber ring is sealed to the baffle.

5. The auxiliary tool for sealing and detecting air leakage of a wheel hub assembly air duct according to claim 1, wherein, The top of the positioning seat is provided with a first support portion for abutting against the oil seal seat ring.

6. The auxiliary tool for sealing and plugging a hub assembly air passage for air tightness detection according to claim 1, characterized in that, The bottom edge of the pressure plate protrudes downward and is provided with a second support part. The bottom of the second support part is used to abut against the oil seal seat ring, and the inner diameter of the second support part is used to abut against the outer diameter of the oil seal seat ring.

7. The auxiliary tool for sealing and plugging a hub assembly air passage for air tightness detection according to claim 1, characterized in that, The variable diameter body includes a central convex spring, which expands outward in diameter when both ends are compressed.

8. The auxiliary tool for sealing and detecting air leakage of a wheel hub assembly air duct according to claim 1, wherein, The auxiliary tooling also includes an air supply pipe for connecting to the air passage of the wheel hub assembly. The air supply pipe is used to connect to an air supply source and is equipped with a valve and a pressure gauge.

9. The auxiliary tool for sealing and detecting air leakage of a wheel hub assembly air duct according to claim 1, wherein, The hub assembly is mounted on the positioning seat, and the top of the positioning seat abuts against the shoulder of the inner hole of the hub assembly used to house the oil seal assembly.

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