Hydraulic bushing and wet-type packaging tool thereof
By opening inner and outer communication through holes at the upper end of the mandrel of the hydraulic bush and using wet packaging tooling to realize liquid entering the cavity, the problem of premature failure caused by excessive pressure in the hydraulic bushing is solved, which extends the service life and improves the packaging efficiency.
Patent Information
- Application Number
- CN202421647937.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-07-12
AI Technical Summary
In the packaging process of existing hydraulic bushings, it is difficult to achieve a balance between the internal liquid and the external air pressure, resulting in excessive internal pressure of the hydraulic bushings and early failure.
A hydraulic bushing is designed to enable liquid to enter the cavity from the gap between the outer jacket and the rubber body and the inner and outer communication through holes at the upper end of the mandrel, and to ensure that the pressure inside and outside the cavity is equal.
It effectively avoids premature failure caused by excessive internal pressure, extends the service life of hydraulic bushings, and improves packaging efficiency and reliability.
Smart Images
Figure CN222894562U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a hydraulic bushing and a wet packaging tooling thereof, belonging to the technical field of hydraulic bushing packaging. Background Art
[0002] During use, the bushing plays the role of reducing vibration and absorbing impact energy. Long-term vibration and deformation have high requirements on the durability of the bushing, especially the hydraulic bushing, which is filled with liquid. If the pressure of the internal liquid is too high, it is easy to damage the rubber surface during the long-term deformation process, resulting in a shortened life of the hydraulic rubber bushing. At present, there are two methods to achieve liquid filling and jacket packaging for hydraulic bushings:
[0003] 1. Filling the inside with liquid and then encapsulating the outside with liquid. This process can complete the filling of the hydraulic bushing, but there is a problem that there is no way to achieve pressure balance inside and outside the hydraulic bushing. It is easy to cause the internal pressure to be greater than the external pressure, causing damage to the rubber surface during the long-term deformation process, and then causing the hydraulic bushing to fail prematurely.
[0004] Second, the hydraulic bushing is first packaged, and then the cavity is vacuumed, and then the vacuumed inner cavity is filled with liquid. Although this process method can control the amount of filling liquid to control the pressure inside the cavity, it is difficult to ensure the reliability of vacuuming due to the need for vacuuming. In the continuous production process, the reliability of the equipment is extremely high. If the equipment is aged or other influencing factors occur, the vacuuming link will not be completed accurately, the quality of the internal filling will be defective, and the cost will be high.
[0005] The vacuuming in the above packaging process is difficult and costly, and the method of filling the inside with liquid and packaging the outside easily causes the pressure of the internal liquid to be greater than the external air pressure, which can easily shorten the life of the hydraulic bushing. Utility Model Content
[0006] The hydraulic bushing provided by the utility model ensures that the pressure inside and outside the cavity is equal, avoids premature failure due to excessive internal pressure of the hydraulic bushing, and prolongs the service life of the hydraulic bushing. The utility model also provides a wet packaging tool for the hydraulic bushing, which supports the hydraulic bushing with a support seat, and uses the conical surface of the pressing component and the reducing component to cooperate to achieve the inward movement of the reducing component to package the outer jacket of the hydraulic bushing on the rubber body, thereby improving the packaging efficiency and reliability.
[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0008] The hydraulic bushing comprises a core shaft, a rubber body vulcanized on the core shaft, and a jacket encapsulated on the rubber body, wherein a cavity for containing liquid is formed between the jacket and the molding surface of the rubber body, and the characteristic is that an inner and outer connecting hole communicating with the cavity is provided at the upper end of the core shaft, and the inner and outer connecting hole is sealed by a steel ball.
[0009] Preferably, the inner and outer connecting holes are formed by connecting an axial hole opened axially from the upper end of the core shaft and a radial hole opened radially, the radial hole is connected to the cavity, and the steel ball is interference-fitted into the axial hole.
[0010] The wet packaging tooling of the hydraulic bushing described above includes a support seat, a pressing assembly connected to a pressing device and a reducing assembly. The hydraulic bushing is placed upright on the support seat, and is characterized in that the reducing assembly is placed on the support seat and arranged on the outer periphery of the hydraulic bushing in contact with the outer sleeve. The conical surface of the pressing assembly fits on the reducing assembly, and as the pressing device presses down, the reducing assembly is pushed inward to form a package for the hydraulic bushing.
[0011] Preferably, the pressing assembly comprises a pressing head, a pressing sleeve and a conical sleeve which are coaxially connected in sequence from top to bottom. The inner wall of the conical sleeve is a conical surface with an inner diameter gradually increasing from top to bottom. The conical sleeve is sleeved on the reducing assembly to form a conical fit.
[0012] Preferably, the reducing component includes a reducing flap mold that forms a conical surface with the inner wall of the conical sleeve. The number of the reducing flap molds is multiple and is evenly distributed on the outer periphery of the hydraulic bushing. Adjacent reducing flap molds are separated and not in contact. The inner side surface of the reducing cone mold is in contact with the outer sleeve. The reducing flap mold moves inward as the conical sleeve is pressed downward to press the outer sleeve against the rubber body, thereby forming a package for the hydraulic bushing.
[0013] Preferably, it also includes a reduction limit assembly supported on the hydraulic bushing, the reduction limit assembly includes a locating pin extending into the core shaft of the hydraulic bushing and a reduction limit plate fixed to the locating pin and supported on the end face of the hydraulic bushing, the reduction limit plate is coaxially arranged in the inner ring of the reduction assembly and forms a limit gap with the inner side surface of the reduction flap mold.
[0014] Preferably, a guide block is coaxially fixed on the top surface of the reduction limit plate, a support tube is coaxially fixed in the downward pressing sleeve, and the guide block guides and fits into the support tube.
[0015] Preferably, the support seat includes a horizontally arranged base plate, a positioning plate fixed on the base plate and a support plate fixed on the positioning plate, the support plate has an inner cavity cooperating with the hydraulic bushing, the hydraulic bushing extends into the inner cavity of the support plate and is placed upright on the support plate.
[0016] The beneficial effects of the utility model are:
[0017] The hydraulic bushing of the utility model has an inner and outer connecting hole connected with the cavity at the upper end of the core shaft. When the hydraulic bushing is packaged, the hydraulic bushing is immersed in liquid, and the liquid enters the cavity from the gap between the outer sleeve and the rubber body and the inner and outer connecting hole. The outer sleeve is then packaged on the rubber body. The inner and outer connecting hole connects the liquid inside and outside the cavity to avoid the volume of the liquid filled in the cavity being greater than the volume of the cavity, so that the pressure inside and outside the cavity is consistent after packaging, and the cavity is just filled with liquid. After the packaging is completed, the hydraulic bushing is taken out of the liquid, and the inner and outer connecting hole is sealed with a steel ball to ensure that the pressure inside and outside the cavity is equal, so as to avoid premature failure due to excessive internal pressure of the hydraulic bushing and extend the service life of the hydraulic bushing.
[0018] The wet packaging tooling of the hydraulic bushing uses a support seat to support the hydraulic bushing, and uses the conical surfaces of the pressing component and the reducing component to cooperate to realize the inward movement of the reducing component to package the outer sleeve of the hydraulic bushing on the rubber body. When packaging, the unpackaged hydraulic bushing is first supported on the tooling and the tooling and the hydraulic bushing are immersed in the liquid, and then the pressing component is pressed down to realize the filling and packaging of the hydraulic bushing. The internal and external connecting holes connect the liquid inside and outside the cavity to avoid the volume of the liquid filled in the cavity being greater than the volume of the cavity, so that the cavity is just filled with liquid. After the hydraulic sleeve bushing is taken out of the liquid, the internal and external connecting holes are sealed with steel balls. The pressure inside and outside the cavity is equal, which avoids compression damage to the rubber surface due to the high liquid pressure in the cavity, improves the packaging efficiency and reliability, and extends the service life of the hydraulic bushing. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of a hydraulic bushing in a specific implementation manner.
[0020] Figure 2 Schematic diagram of hydraulic bushing mounted on wet packaging tooling of hydraulic bushing. DETAILED DESCRIPTION
[0021] Combine the following Figure 1~2 The embodiments of the utility model are described in detail.
[0022] The hydraulic bushing includes a core shaft 1, a rubber body 2 vulcanized on the core shaft 1, and a sleeve 3 encapsulated on the rubber body 2. A cavity 4 for containing liquid is formed between the sleeve 2 and the mold surface of the rubber body. The characteristic is that an inner and outer connecting hole 11 connected to the cavity 4 is opened at the upper end of the core shaft 1, and the inner and outer connecting hole 11 is sealed by a steel ball 5.
[0023] The hydraulic bushing 100 described above has an inner and outer connecting hole 11 connected to the cavity 4 at the upper end of the core shaft 1. When the hydraulic bushing is packaged, the hydraulic bushing is immersed in liquid, and the liquid enters the cavity from the gap between the outer sleeve 3 and the rubber body 2 and the inner and outer connecting hole 11. The outer sleeve 3 is then packaged on the rubber body 2. The inner and outer connecting hole 11 connects the liquid inside and outside the cavity 4 to avoid the volume of the liquid filled in the cavity 4 being greater than the volume of the cavity 4, so that the pressure inside and outside the cavity is consistent after packaging, and the cavity is just filled with liquid. After packaging, the hydraulic bushing is taken out of the liquid, and the inner and outer connecting hole 11 is sealed with a steel ball 5 to ensure that the pressure inside and outside the cavity 4 is equal, thereby avoiding premature failure due to excessive internal pressure of the hydraulic bushing and extending the service life of the hydraulic bushing.
[0024] The inner and outer connecting holes 11 are formed by connecting an axial hole 12 opened axially from the upper end of the core shaft 1 and a radial hole 13 opened radially. The radial hole 13 is connected to the cavity 4, and the steel ball 5 is inserted into the axial hole 12. The inner hole connecting hole 11 is opened from the upper end of the core shaft 1. The axial hole 12 and the radial hole 13 are connected to form an L-shaped inner and outer connecting hole 11. After the outer sleeve is packaged in the liquid, the hydraulic bushing is taken out of the liquid. The liquid will not flow outward from the inner hole connecting hole 11. The inner and outer connecting holes 11 connect the inside and outside of the cavity during packaging, ensuring that the pressure inside and outside the cavity 4 is consistent, avoiding the increase of the liquid pressure in the cavity due to the shrinkage packaging of the outer sleeve, and avoiding the compression damage to the rubber surface due to the high liquid pressure in the cavity, which can effectively extend the service life of the hydraulic bushing.
[0025] The wet packaging tooling of the hydraulic bushing described above includes a support seat 6, a pressing component 7 connected to a pressing device, and a reducing component 8. The hydraulic bushing is placed upright on the support seat 6, and is characterized in that the reducing component 8 is placed on the support seat 6 and is arranged on the outer periphery of the hydraulic bushing in contact with the outer sleeve 3. The conical surface of the pressing component 7 fits on the reducing component 8, and as the pressing device presses down, the reducing component 8 is pushed inward to form a package for the hydraulic bushing.
[0026] The wet packaging tooling of the hydraulic bushing described above uses a support seat 6 to support the hydraulic bushing 100, and uses the conical surfaces of the pressing component 7 and the reducing component 8 to cooperate to realize the inward movement of the reducing component to package the outer sleeve 3 of the hydraulic bushing on the rubber body 3. When packaging, the unpackaged hydraulic bushing is first supported on the tooling and the tooling and the hydraulic bushing are immersed in the liquid, and then the pressing component is pressed down to realize the filling and packaging of the hydraulic bushing. The internal and external connecting holes connect the liquid inside and outside the cavity to avoid the volume of the liquid filled in the cavity being greater than the volume of the cavity, so that the cavity is just filled with liquid. After the hydraulic sleeve bushing is taken out of the liquid, the internal and external connecting holes are sealed with steel balls. The pressure inside and outside the cavity is equal, which avoids compression damage to the rubber surface due to the high liquid pressure in the cavity, improves the packaging efficiency and reliability, and extends the service life of the hydraulic bushing.
[0027] The pressing assembly 7 comprises a pressing head 71, a pressing sleeve 72 and a conical sleeve 73 which are coaxially connected from top to bottom. The inner wall of the conical sleeve 73 is a conical surface with an inner diameter gradually increasing from top to bottom. The conical sleeve 73 is sleeved on the reducing assembly 8 to form a conical surface fit. The pressing head 71 is connected to the pressing device. The pressing sleeve 72 and the conical sleeve 73 are pressed down with the pressing head 71. The pressing of the conical sleeve 73 causes the reducing assembly 8 to move inward to form a reducing action to encapsulate the outer sleeve 3 on the rubber body 3.
[0028] The reducing component 8 includes a reducing flap mold 81 that forms a conical surface with the inner wall of the conical sleeve 73. The number of the reducing flap molds 81 is multiple and evenly distributed on the outer periphery of the hydraulic bushing. Adjacent reducing flap molds 81 are separated and do not contact each other. The inner side of the reducing cone mold 81 contacts the outer sleeve 3. The reducing flap mold 81 moves inwardly with the downward pressure of the conical sleeve 73 to press the outer sleeve 3 onto the rubber body 2, thereby forming a package for the hydraulic bushing. When the conical sleeve 73 is pressed downward, the multiple reducing flap molds 81 move inwardly in the radial direction synchronously, that is, move inwardly to press the outer sleeve 3 onto the rubber body 2, so that the outer sleeve 3 is buckled with the rubber skeleton on the rubber body 2, thereby forming a package for the hydraulic bushing.
[0029] It also includes a reduction limit assembly 9 supported on the hydraulic bushing, which includes a positioning pin 91 extending into the core shaft 1 of the hydraulic bushing and a reduction limit plate 92 fixed to the positioning pin 91 and supported on the end face of the hydraulic bushing. The reduction limit plate 92 is coaxially arranged in the inner ring of the reduction assembly 8, and forms a limiting gap with the inner side of the reduction flap mold 81. The reduction limit plate 92 is used to limit the inward approaching position of the reduction flap mold 81. When the reduction flap mold 81 contacts the reduction limit plate 92, the inward approaching displacement of the reduction flap mold 81 reaches the maximum value, and the reduction flap mold 81 can no longer move inward intermittently. The reduction limit plate 92 is used to protect the outer sleeve 3, which can be sealed in place without being crushed, so as to avoid the reduction flap mold 81 crushing the outer sleeve 3 due to the conical sleeve 73 pressing down too much.
[0030] The top surface of the reducing limit plate 92 is coaxially fixed with a guide block 10, the inner side of the pressing sleeve 72 is coaxially fixed with a support tube 74, and the guide block 10 is guided and extended into the support tube 74. Through the guiding cooperation between the guide block 10 and the support tube 74, the pressing sleeve 72 is guided to press down, so as to guide the pressing down assembly 7, thereby preventing the pressing down assembly 7 from tilting and improving the reliability of the package.
[0031] The support seat 6 includes a horizontally arranged bottom plate 61, a positioning plate 62 fixed on the bottom plate 61, and a support plate 63 fixed on the positioning plate 62. The support plate 63 has an inner cavity that cooperates with the hydraulic bushing 100. The hydraulic bushing 100 extends into the inner cavity of the support plate 63 and is placed upright on the support plate. The support seat 6 supports the hydraulic bushing 100 to remain upright during the packaging process, thereby avoiding the packaging being not in place due to the tilt of the hydraulic bushing 100 during the packaging process, thereby improving the packaging reliability.
[0032] The packaging process of the hydraulic bushing 100 by the wet packaging tool of the hydraulic bushing described above is described in detail below:
[0033] 1. Install the unpackaged hydraulic bushing 100 onto the wet packaging tooling of the hydraulic bushing described above;
[0034] 2. Immerse the tooling and hydraulic bushing in the liquid, and the liquid enters the cavity from the gap between the outer sleeve 3 and the rubber body 2 and the internal and external connecting holes 11;
[0035] 3. Connect the pressing device to the pressing head 71 and apply downward pressure to the pressing head 71 to press the conical sleeve 73 downward, push the reduced diameter flap die 81 inward to buckle the outer sleeve 3 with the rubber skeleton on the rubber body 2, and form a package for the hydraulic bushing;
[0036] 4. Use a pressing device to lift the pressing assembly 7 to separate the pressing assembly 7 from the reducing assembly 8, and remove the hydraulic bushing 100 from the liquid;
[0037] 5. Press the steel ball into the inner and outer connecting hole 11 to seal it.
[0038] The above is a complete description of the technical solutions of the embodiments of the utility model in combination with the accompanying drawings. It should be noted that the described embodiments are only part of the embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
Claims
1. A hydraulic bushing, comprising a mandrel, a rubber body vulcanized on the mandrel, and a jacket encapsulated on the rubber body, wherein a cavity for accommodating liquid is formed between the jacket and the rubber body, and characterized in that: The upper end of the core shaft is provided with an inner and outer connecting hole which is communicated with the cavity, and the inner and outer connecting hole is sealed by a steel ball.
2. The hydraulic bushing according to claim 1, characterized in that: The inner and outer connecting holes are formed by connecting an axial hole opened axially from the upper end of the core shaft and a radial hole opened radially, the radial hole is connected to the cavity, and the steel ball is interference-fitted into the axial hole.
3. The wet packaging tooling of the hydraulic bushing according to any one of claims 1 to 2 comprises a support seat, a pressing assembly connected to a pressing device and a reducing assembly, the hydraulic bushing is placed upright on the support seat, and is characterized in that: The reducing component is placed on the support seat and arranged on the outer periphery of the hydraulic bushing in contact with the outer sleeve. The conical surface of the pressing component fits on the reducing component and pushes the reducing component inward as the pressing device presses down, forming a package for the hydraulic bushing.
4. The wet packaging tool for the hydraulic bushing according to claim 3, characterized in that: The pressing assembly comprises a pressing head, a pressing sleeve and a conical sleeve which are coaxially connected from top to bottom. The inner wall of the conical sleeve is a conical surface with an inner diameter gradually increasing from top to bottom. The conical sleeve is mounted on the reducing assembly to form a conical fit.
5. The wet packaging tool for the hydraulic bushing according to claim 4, characterized in that: The reducing component includes a reducing flap mold that forms a conical surface with the inner wall of the conical sleeve. There are multiple reducing flap molds and they are evenly distributed on the outer periphery of the hydraulic bushing. Adjacent reducing flap molds are separated and do not contact each other. The inner side surface of the reducing cone mold contacts the outer sleeve. The reducing flap mold moves inward as the conical sleeve is pressed downward to press the outer sleeve against the rubber body, thereby forming a package for the hydraulic bushing.
6. The wet packaging tool for the hydraulic bushing according to claim 5, characterized in that: It also includes a reduction limit assembly supported on the hydraulic bushing, the reduction limit assembly includes a locating pin extending into the core shaft of the hydraulic bushing and a reduction limit plate fixed to the locating pin and supported on the end face of the hydraulic bushing, the reduction limit plate is coaxially arranged in the inner ring of the reduction assembly and forms a limit gap with the inner side surface of the reduction flap mold.
7. The wet packaging tool for the hydraulic bushing according to claim 6, characterized in that: A guide block is coaxially fixed on the top surface of the reduction limit plate, and a support tube is coaxially fixed in the downward pressing sleeve, and the guide block guides and cooperates to extend into the support tube.
8. The wet packaging tool for the hydraulic bushing according to claim 3, characterized in that: The support seat includes a horizontally arranged bottom plate, a positioning plate fixed on the bottom plate and a support plate fixed on the positioning plate. The support plate has an inner cavity that cooperates with the hydraulic bushing. The hydraulic bushing extends into the inner cavity of the support plate and is placed upright on the support plate.