Hydraulic bushing liquid filling tool

Abstract

The application discloses a hydraulic bushing liquid filling tool, which comprises a damping liquid container for filling damping liquid, an upper die assembly fixedly installed on a movable end of a press, and a lower die assembly installed in the damping liquid container and located below the damping liquid surface, wherein the lower die assembly comprises a base, a plurality of guide rails distributed in a ring shape, and a plurality of press fitting sliders slidably installed on the guide rails, the upper die assembly drives the plurality of press fitting sliders to move synchronously when the upper die assembly is closed, and the plurality of press fitting sliders after moving combine to form a cavity matched with the hydraulic bushing; wherein a flow guide groove is arranged on the press fitting slider, the flow guide groove is located on the left and right sides of the press fitting slider along the moving direction, and the adjacent two flow guide grooves form a drainage structure when the adjacent two press fitting sliders combine. The hydraulic bushing liquid filling tool is provided, and the flow guide groove arranged on the slider is used for reducing the generation of air bubbles due to the movement of the slider in the damping liquid.

Description

Technical Field

[0001] This invention relates to the field of hydraulic bushing machining tooling technology, and more specifically, to a hydraulic bushing filling tooling. Background Technology

[0002] Ordinary rubber bushings have a small hysteresis angle, within 10°. At higher excitation frequencies, they undergo dynamic hardening, making them unsuitable for low-frequency vibration control and high-frequency noise isolation. Although researchers have continuously attempted to address this issue by modifying the rubber material formulation, resulting in an increased hysteresis angle, certain properties have deteriorated, failing to meet practical application requirements. Therefore, new requirements have been placed on vibration isolation elements: they should possess high stiffness and high damping characteristics at low frequencies (1-50Hz) to rapidly attenuate vehicle body vibrations caused by random excitation from road surface unevenness, and low stiffness and low damping at high frequencies above 50Hz to meet vibration isolation and noise reduction requirements. Through continuous improvement of bushing elements, it was discovered that hydraulic rubber bushings, formed by encapsulating liquid inside the rubber bushing, can effectively meet these requirements.

[0003] Combination Figure 1 and Figure 2 As shown, the mainstream hydraulic bushing 1 includes a rubber main spring, an outer sleeve 11, and a flow channel ring 14, which together form a flow channel structure 15 for filling damping fluid. The rubber main spring includes an inner core 16, a metal skeleton 13, and a rubber component 12. The rubber component 12 is formed around the outer periphery of the inner core 16 and wraps around the metal skeleton 13. The damping fluid is mainly composed of a mixture of ethylene glycol and water.

[0004] Traditional damping fluid assembly methods mainly include dry assembly and wet assembly. Dry assembly involves injecting liquid into the flow channel structure 15 in a metered or slightly saturated manner through a specially designed filling channel to achieve the filling purpose. Its filling rate is slow, affecting production efficiency. Wet assembly, also known as submerged assembly, involves immersing the part to be filled in damping fluid and using the press-fit slider 43 to compress the outer jacket 11 to deform it and complete the seal. However, during the movement of the press-fit slider 43, air bubbles are easily generated in the damping fluid. If these air bubbles enter the flow channel structure 15, they will affect the shock absorption performance of the hydraulic bushing 1. Summary of the Invention

[0005] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, this invention proposes a hydraulic bushing filling fixture, which reduces the generation of air bubbles caused by the movement of the slider in the damping fluid by providing a guide groove on the slider.

[0006] The technical solution adopted by this invention is: to provide a hydraulic bushing filling fixture, comprising:

[0007] Damping fluid container, used for filling damping fluid;

[0008] The upper mold assembly is fixedly installed at the moving end of the press;

[0009] The lower mold assembly is installed in the damping fluid container and located below the damping fluid surface. The lower mold assembly includes a base, multiple guide rails arranged in a ring, and multiple press-fit sliders slidably installed on the guide rails. When the upper mold assembly closes the mold, it drives the multiple press-fit sliders to move synchronously. The multiple press-fit sliders after movement combine to form a cavity that is compatible with the hydraulic bushing.

[0010] The press-fit slider is provided with a flow guide groove, which is located on the left and right sides of the press-fit slider along the moving direction. When two adjacent press-fit sliders are combined, the two adjacent flow guide grooves surround each other to form a flow diversion structure.

[0011] With the above structure, the clamping force of the upper and lower mold assemblies drives multiple press-fit sliders to move inward synchronously. After mold closing, the press-fit sliders press against the outer sleeve of the hydraulic bushing, causing the outer sleeve to shrink and deform, thus completing the seal. A guide groove is provided on the press-fit slider to reduce the generation of air bubbles during its movement, preventing residual air bubbles from affecting the subsequent assembly of the hydraulic bushing. Compared to traditional press-fit slider structures, the guide groove in this invention can guide the damping fluid inside the press-fit slider to the outside. With approximately equal amounts of air bubbles generated, the press-fit slider in this invention moves at a faster speed, resulting in higher production efficiency.

[0012] According to one embodiment of the present invention, the press-fit slider is provided with a guide hole, which penetrates both ends of the press-fit slider along the moving direction; the damping fluid at the front end of the press-fit slider flows to the rear end of the press-fit slider through the guide hole.

[0013] According to one embodiment of the present invention, the cross-sectional area of ​​the guide hole gradually increases from the front end to the rear end of the press-fit slider; the flow velocity of the damping fluid in the guide hole gradually decreases from the front end to the rear end of the press-fit slider, so as to avoid the generation and retention of air bubbles in the guide hole.

[0014] According to one embodiment of the present invention, the upper mold assembly includes an upper template and a pressure block. The upper template is used to be mounted on a press, and the pressure block is mounted on the upper template. The pressure block has a guide surface for abutting against the pressing slider and guiding the movement of the pressing slider. The pressing slider is provided with an inclined surface corresponding to the guide surface. The inclined surface and the guide surface are combined to form a wedge structure, so that the downward movement of the upper mold assembly is the lateral movement of the pressing slider.

[0015] According to one embodiment of the present invention, the pressure block is provided with at least one first oil discharge channel, which connects the inside and outside of the pressure block; during the downward movement of the pressure block, the first oil discharge channel discharges the damping fluid at the bottom of the pressure block outward, thereby reducing the damping fluid fluctuation near the hydraulic bushing.

[0016] According to one embodiment of the present invention, the base is provided with a plurality of guide rods for positioning and cooperating with the pressure block; correspondingly, the pressure block is provided with a guide sleeve or a guide hole structure.

[0017] According to one embodiment of the present invention, the upper mold assembly further includes a core and a first elastic member, the core being slidably connected to the pressure block, the first elastic member abutting against the core and having an elastic tendency to cause the core to move away from the pressure block; the first elastic member is provided so that the core remains abutting against the end face of the hydraulic bushing, avoiding displacement of the rubber part during the pressing process.

[0018] According to one embodiment of the present invention, the lower mold assembly further includes a center block and a center positioning rod. The center block is located on the surface of the base and protrudes. The center positioning rod is fixedly installed on the center block for positioning and engaging with the inner core on the hydraulic bushing. The hydraulic bushing is sleeved on the center positioning rod to prevent the hydraulic bushing from rotating during the pressing process.

[0019] According to one embodiment of the present invention, a second elastic element is provided between the pressing slider and the center block, and the second elastic element has an elastic tendency to move the pressing slider away from the center block; the provision of the second elastic element ensures that the inclined surface on the pressing slider remains in contact with the guide surface, thereby achieving the purpose of synchronous operation of multiple pressing sliders.

[0020] According to one embodiment of the present invention, the press-fit slider is provided with a mounting groove for mounting the second elastic element, and the press-fit slider is provided with at least one second oil discharge channel, wherein the second oil discharge channel communicates the inner surface of the mounting groove with the outer surface of the press-fit slider. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A perspective view of a hydraulic bushing in the prior art;

[0023] Figure 2This is a cross-sectional view of a hydraulic bushing in the prior art;

[0024] Figure 3 This is a perspective view of the liquid filling fixture in an embodiment of the present invention;

[0025] Figure 4 This is a top view of the liquid filling fixture in an embodiment of the present invention;

[0026] Figure 5 for Figure 4 Sectional view of line AA in the middle;

[0027] Figure 6 This is an exploded view of the liquid filling fixture in an embodiment of the present invention;

[0028] Figure 7 This is a half-sectional view of the liquid filling tool after explosion in an embodiment of the present invention;

[0029] Figure 8 for Figure 7 A magnified view of a section at point B in the middle;

[0030] Figure 9 This is a cross-sectional view of the upper mold assembly in an embodiment of the present invention;

[0031] Figure 10 This is a perspective view of the lower mold assembly in an embodiment of the present invention;

[0032] Figure 11 for Figure 10 A magnified view of a section at point C;

[0033] Figure 12 This is a perspective view of the lower mold assembly after the press-fit slider is closed in an embodiment of the present invention;

[0034] Figure 13 This is a perspective view of the press-fit slider in an embodiment of the present invention;

[0035] Figure 14 This is a cross-sectional view of the press-fit slider in an embodiment of the present invention.

[0036] Explanation of the labels in the diagram:

[0037] 1. Hydraulic bushing; 2. Damping fluid container; 3. Upper mold assembly; 4. Lower mold assembly;

[0038] 11. Outer casing; 12. Rubber parts; 13. Metal skeleton; 14. Flow channel ring; 15. Flow channel structure; 16. Inner core;

[0039] 31. Upper template; 32. Pressure block; 33. Core; 34. First elastic element; 35. First oil drainage channel;

[0040] 32a. Guide surface;

[0041] 41. Base; 42. Guide rail; 43. Press-fit slider; 44. Center block; 45. Center positioning rod; 46. Guide rod; 47. Second elastic element;

[0042] 43a. Guide hole; 43b. Guide groove; 43c. Mounting groove; 43d. Second oil drain channel. Detailed Implementation

[0043] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0044] like Figures 3 to 8 As shown, this embodiment discloses a hydraulic bushing filling fixture, comprising:

[0045] Damping fluid container 2, used for filling damping fluid;

[0046] Upper mold assembly 3 is fixedly installed at the movable end of the press;

[0047] The lower mold assembly 4 is installed in the damping fluid container 2 and is located below the damping fluid surface. The lower mold assembly 4 includes a base 41, a plurality of guide rails 42 arranged in a ring, and a plurality of press-fit sliders 43 slidably installed on the guide rails 42. When the upper mold assembly 3 closes the mold, it drives the plurality of press-fit sliders 43 to move synchronously. The plurality of press-fit sliders 43 after moving combine to form a cavity adapted to the hydraulic bushing 1.

[0048] The press-fit slider 43 is provided with a flow guide groove 43b, which is located on the left and right sides of the press-fit slider 43 along the moving direction. When two adjacent press-fit sliders 43 are combined, the two adjacent flow guide grooves 43b surround each other to form a flow guiding structure.

[0049] Furthermore, in this embodiment, the lower mold assembly 4 is mounted on the base 41 of the press, and the moving end of the press drives the upper mold assembly 3 to move towards or away from the lower mold assembly 4. When the upper mold assembly 3 and the lower mold assembly 4 approach each other until they abut each other, the upper mold assembly 3 and the lower mold assembly 4 close together.

[0050] Furthermore, in this embodiment, when the upper mold assembly 3 and the lower mold assembly 4 are closed, the press-fit slider 43 abuts against the outer sleeve 11 and deforms the upper and lower ends of the outer sleeve 11 to form a constricted structure, achieving the effect of sealing the rubber part 12. In another embodiment, the press-fit slider abuts against the outer periphery of the outer sleeve 11 and abuts against the outer periphery of the rubber part 12 to form a seal. In another embodiment, while deforming the outer sleeve 11 to form a constricted structure, the press-fit slider 43 also abuts against the outer periphery of the outer sleeve 11 to form a seal.

[0051] Furthermore, combined Figures 13 to 14 As shown, in this embodiment, the pressing slider 43 has guide grooves 43b on both the left and right sides along the moving direction. When the mold is closed, the sides of two adjacent pressing sliders 43 abut against each other, and the guide grooves 43b on the two pressing sliders 43 enclose each other to form a flow-guiding structure. The flow-guiding structure is used to guide the damping fluid on the front side of the moving pressing slider 43 to the rear side, avoiding the generation of air bubbles in the damping fluid due to turbulence.

[0052] Specifically, in combination Figure 13 and Figure 14 As shown, the press-fit slider 43 is provided with a guide hole 43a, which penetrates the front and rear ends of the press-fit slider 43 along the moving direction.

[0053] Specifically, the cross-sectional area of ​​the guide hole 43a gradually increases from the front end to the rear end of the press-fit slider 43.

[0054] Furthermore, in this embodiment, the guide hole 43a is a tapered guide hole 43a, and the opening of the guide hole 43a at the front end of the press-fit slider 43 is smaller than its opening at the rear end of the press-fit slider 43.

[0055] Specifically, the upper mold assembly 3 includes an upper template 31 and a pressure block 32. The upper template 31 is used to be mounted on a press, and the pressure block 32 is mounted on the upper template 31. The pressure block 32 has a guide surface 32a for abutting against the pressing slider 43 and guiding the pressing slider 43 to move.

[0056] Combination Figures 7 to 9 As shown, in this embodiment, the upper template 31 is fixedly installed at the movable end of the press, and the pressure block 32 is fixedly installed below the upper template 31. The lower surface of the pressure block 32 is recessed upward to form a parting surface structure, and the guide surface 32a is located on this parting surface.

[0057] Furthermore, the press-fit slider 43 is provided with an inclined surface corresponding to the guide surface 32a. The inclined surface and the guide surface 32a are combined to form an inclined wedge structure, so that the downward movement of the upper mold assembly 3 is used as the lateral movement of the press-fit slider 43.

[0058] Specifically, in combination Figure 9 As shown, the pressure block 32 is provided with at least one first oil discharge channel 35, which connects the inside and outside of the pressure block 32.

[0059] Furthermore, in this embodiment, one end of the first oil drain channel 35 is located in the parting surface structure at the bottom of the pressure block 32, and the other end is located on the outer surface of the pressure block 32. During the downward movement of the pressure block 32, the first oil drain channel 35 discharges the air and / or damping fluid at the bottom of the pressure block 32 to the outside.

[0060] Specifically, in combination Figure 10 As shown, the base 41 is provided with a plurality of guide rods 46 for positioning and cooperating with the pressure block 32.

[0061] Furthermore, four guide rails 42 are provided on the base 41, and the four guide rails 42 are respectively located at the four corners of the base 41.

[0062] Specifically, in combination Figure 7 and Figure 8 As shown, the upper mold assembly 3 further includes a core 33 and a first elastic element 34. The core 33 is slidably connected to the pressure block 32. The first elastic element 34 abuts against the core 33 and has an elastic tendency to cause the core 33 to move away from the pressure block 32.

[0063] Specifically, in combination Figures 10 to 12 As shown, the lower mold assembly 4 also includes a center block 44 and a center positioning rod 45. The center block 44 is located on the surface of the base 41 and protrudes. The center positioning rod 45 is fixedly installed on the center block 44 and is used to position and cooperate with the inner core 16 on the hydraulic bushing 1.

[0064] Furthermore, in this embodiment, the upper surface of the center block 44 is flush with the upper surface of the guide rail 42. A notch is provided on the inner wall of the inner core 16 of the hydraulic bushing 1, and a protrusion adapted to the notch is provided on the outer periphery of the central positioning rod 45. The notch and protrusion engage to prevent relative rotation of the hydraulic bushing 1 relative to the central positioning rod 45 during the pressing process.

[0065] Specifically, in combination Figure 11 As shown, a second elastic element is provided between the pressing slider 43 and the center block 44, and the second elastic element has an elastic tendency to cause the pressing slider 43 to move away from the center block 44.

[0066] Specifically, the press-fit slider 43 is provided with a mounting groove 43c for mounting the second elastic element, and the press-fit slider 43 is provided with at least one second oil drain channel 43d, and the second oil drain channel 43d communicates the inner surface of the mounting groove 43c with the outer surface of the press-fit slider 43.

[0067] Furthermore, in this embodiment, a T-shaped groove is recessed downward on the guide rail 42, and the press-fit slider 43 slides in the T-shaped groove. The second elastic member is located between the press-fit slider 43 and the center block 44, more specifically, one end of the second elastic member abuts against the outer periphery of the center block 44, and the other end abuts against the inner wall of the mounting groove 43c.

[0068] The working steps of the hydraulic bushing filling fixture in this embodiment are as follows:

[0069] First, inject an appropriate amount of damping fluid into the damping fluid container 2. The level of the damping fluid should not be lower than the height of the lower mold assembly 4 + the height of the hydraulic bushing 1 + 5 cm.

[0070] Then, the rubber main spring and the flow channel ring 14 are assembled below the damping fluid surface, and the assembled rubber main spring is pressed into the outer sleeve 11.

[0071] Next, the partially assembled hydraulic bushing 1 is placed into the lower mold assembly 4, with the notch on the inner core 16 aligned with the protrusion on the center positioning rod 45.

[0072] Finally, during the slow closing of the upper mold assembly 3 and the lower mold assembly 4, the core 33 first contacts the rubber main spring. As the upper mold assembly 3 continues to move downward, it drives the rubber main spring downward as well. During this downward movement, the rubber main spring provides a reaction force to the core 33, causing it to move upward relative to the pressure block 32. The first elastic element 34 is compressed until the rubber main spring is completely pressed into the outer sleeve 11, and the bottom end of the inner core 16 abuts against the center block 44. The upper mold assembly 3 continues to move downward and provides a radial force to the pressing slider 43 through the guide surface 32a, causing the second elastic element to gradually compress. This causes the pressing slider 43 to move radially along the guide rail 42. The simultaneous radial movement of the twelve-petal pressing mechanism compresses the outer sleeve 11 of the hydraulic bushing 1, completing the diameter reduction. During this process, the rubber main spring provides a reaction force to the core 33, causing it to continue moving upward relative to the pressure block 32. The first elastic element 34 is compressed, and the excess damping fluid squeezed out of the cavity is discharged through the first oil discharge channel 35 on the pressure block 32 and the guide groove 43b and guide hole 43a on the pressing slider 43. During the pressing process, the core 33 and the first elastic element 34 restrict the axial movement of the part and ensure the free extension of the metal jacket 11 during the diameter reduction process.

[0073] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0074] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0075] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0076] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A hydraulic bushing liquid filling tool characterized by, The application relates to a hydraulic bushing pressing device, which comprises the following components: a damping liquid container (2) for filling damping liquid; an upper die assembly (3) fixedly installed at the movable end of a press machine; a lower die assembly (4) installed in the damping liquid container (2) and located below the damping liquid liquid level, wherein the lower die assembly (4) comprises a base (41), a plurality of guide rails (42) distributed in a ring shape and a plurality of pressing sliding blocks (43) slidably installed on the guide rails (42), the upper die assembly (3) drives the plurality of pressing sliding blocks (43) to move synchronously when the upper die assembly (3) is closed, and the plurality of pressing sliding blocks (43) after moving are combined to form a cavity matched with the hydraulic bushing (1); wherein a flow guide groove (43b) is arranged on the pressing sliding block (43), the flow guide groove (43b) is located on the left and right sides of the pressing sliding block (43) along the moving direction, and two adjacent flow guide grooves (43b) form a drainage structure when two adjacent pressing sliding blocks (43) are combined.

2. The hydraulic bushing liquid filling tool according to claim 1, characterized in that: A flow guide hole (43a) is arranged on the pressing sliding block (43), and the flow guide hole (43a) penetrates through the front and rear ends of the pressing sliding block (43) along the moving direction.

3. The hydraulic bushing liquid filling tool according to claim 2, characterized in that: The cross-sectional area of the flow guide hole (43a) gradually increases from the front end of the pressing sliding block (43) to the rear end of the pressing sliding block (43).

4. The hydraulic bushing liquid filling tool according to claim 1, characterized in that: The upper die assembly (3) comprises an upper die plate (31) and a pressing block (32), the upper die plate (31) is used for being installed on the press machine, the pressing block (32) is installed on the upper die plate (31), and the pressing block (32) has a guide surface (32a) used for abutting against the pressing sliding block (43) to guide the movement of the pressing sliding block (43).

5. The hydraulic bushing liquid filling tool according to claim 4, characterized in that: At least one first oil discharge channel (35) is arranged on the pressing block (32), and the first oil discharge channel (35) communicates the inside and outside of the pressing block (32).

6. The hydraulic bushing liquid filling tool according to claim 4, characterized in that: A plurality of guide rods (46) used for positioning and matching with the pressing block (32) are arranged on the base (41).

7. The hydraulic bushing liquid filling tool according to claim 4, characterized in that: The upper die assembly (3) further comprises a core (33) and a first elastic member (34), the core (33) is slidably connected with the pressing block (32), the first elastic member (34) abuts against the core (33) and has an elastic tendency of moving the core (33) away from the pressing block (32).

8. The hydraulic bushing liquid filling tool according to claim 1, characterized in that: The lower die assembly (4) further comprises a center block (44) and a center positioning rod (45), the center block (44) is located on the surface of the base (41) and is protrusively arranged, and the center positioning rod (45) is fixedly installed on the center block (44) and is used for positioning and matching with an inner core (16) on the hydraulic bushing (1).

9. The hydraulic bushing liquid filling tool according to claim 8, characterized in that: A second elastic member (47) is arranged between the pressing sliding block (43) and the center block (44), and the second elastic member (47) has an elastic tendency of moving the pressing sliding block (43) away from the center block (44).

10. The hydraulic bushing liquid filling tool of claim 9, wherein: The pressing slider (43) is provided with a mounting groove (43c) for mounting the second elastic member (47), and the pressing slider (43) is provided with at least one second oil discharge channel (43d) in communication with the inner surface of the mounting groove (43c) and the outer surface of the pressing slider (43).

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